Live Load Surcharge On Retaining Walls

Geo-grid table-level, soil backfill, no surcharge Approved geo-grid for Rockwood retaining wall construction in St. Surcharges. condition and a retaining wall in another. Dead load surcharges, on the other hand, are considered to contribute to both destabilizing and stabilizing forces since they are usually of constant magnitude and are present for the life of the structure. Each link above contains a printable update for the MnDOT Standard Plans Manual including instructions and a list of changes. This spreadsheet calculates the resulting pressure field acting on the retaining wall due to a point load at a given position behind the wall. The following data is available: a) Soil properties: Sand, friction angle = 30 degrees, total unit weight 120 pcf, loading modulus of elasticity Eload= 300 ksf, reloading modulus of elasticity Eur = 900 ksf. 1 illustrates that depending upon wall height, StoneWall SELECT SRWs offer a 25 to 50 % cost savings over conventional cast-in-place concrete retaining walls. These forces apply additional lateral forces along the back of the wall. British Columbia, Canada. Distribution of surcharge live loads through earth as vertical and lateral forces is discussed in Subsection H 374. Retaining wall design examples with DeepEx. The Grande wall system allows for the construction of highly stable retaining walls in commercial and industrial applications. Elevations of impact load are specified on the plans. Sheet Pile Wall Example with DeepEX. all must be taken into consideration. Humes L walls are modular cantilever wall units which can be used for earth retaining applications. The soil on the back face is at a higher level and is called back fill. The wall may retain soil or other granular material. Specification Section: 2018 Retaining Wall and Mechanically Stabilized Earth (MSE) Guide Parul Dubey on October 29, 2018 - in Directory , Retaining Wall , specification section Retaining walls, MSE and soil-retention products continue to evolve, as does the software that designs these systems and simulates their performance. Semi-Gravity Types 3. If the height of the bearing cap varies more than 18 in. Live Load Surcharge. 2-5 LIVE LOAD SURCHARGE P LLS = (2 ft) g s C a H P LLS = pressure due to live load surcharge only g s = unit weight of soil (Note: AASHTO 5. LIVE LOADS (EQUIPMENT) LOAD FACTORS STRENGTH REDUCTION FACTOR VARIES FROM 0. 0 kN/m Applied horizontal live load on wall ; Flive = 0. Account for vehicle impact load. It is time consuming to do all the stability and reinforcement design using in house tools. The water pressure is similar to the condition in example 5. As a result, elastic approach has a significant difference with real values. Adherence to retaining structures code and other legislation. • Used as an exposed end unit or a 90°corner. 00, which ever Controls Design 1. 333 x 24 x 11. ) The Bridge Office has revised its policy regarding the traffic barrier. Unlike concrete sleepers which are heavy and leave gaps between stacked sleepers, the TerraFirm retaining wall panels are lightweight reinforced composite panels. Such surcharges can include buildings, highways, or railroads. 5 ft (From Table 1) = 105 psf. This video webinar provides an overview of using the TensarSoil Software to design MSE retaining walls. Driveways, parking lots, equipment, etc, are examples of surcharges in a basement wall. STRUCTURAL CALCULATIONS: SITE RETAINING WALL DESIGN Live Load 1. When walls must be placed on slopes, conduct both short- and long-term stability analyses using appropriate soil strengths, geometry, and loading conditions (live load surcharge, hydrostatic, etc. 5 Live Loads 4. 2-5000 Ib wheel loads 4 feet apart. civilengineeringacademy. Retaining walls that are not over 4 feet (1219 mm) in height. Procedures Procedures for the Structural Approval of Retaining Walls, Bridges and Culverts adjacent to or on the Highway. The matter to be determined 1. A common retaining wall used in recent years is the MSE wall system (Mechanically Stabilized Earth). SoilStructure RAPID RETAIN, version 3 is a tool for designing Abutment Wall, Wing Wall, Cantilever Retaining Wall & Basement Wall. CVE 40002 Structural Design of Low Rise Buildings SWINBURNE UNIVERSITY oF TECHNOLOGY FACULTY OF SCIENCE. To compute surcharge load on retaining wall, you can see the attached document that provides some guideline. It analyses the stability of the wall based on the loads and resistances, and results in bearing pressure, sliding, overturning and rotational stabilities. 4 Design Criteria Used to Develop the Standard Fender System. Design loads and load combinations must be in accordance with AS 5100, but with a minimum uniformly distributed live traffic load (UDL) of 20 kPa for the serviceability limit state. Added the ability to apply triangular seismic loading to retaining walls per a max force or the Mononobe-Okabe formulation. SPW 911 has as a default a uniform live load of 200 psf. An excepted practice to model the engineered slope is to simply add an equivalent live load surcharge above the wall for the remaining slope. Gravity walls will be up to 3m (10 feet). Sheet Pile Wall Example with DeepEX. SLOPE REDUCTION FACTORS. 02 Aesthetics Considerations. (1) Traffic Loading. Both the toe surcharge and the heel surcharge have associated checkboxes that can be used to dictate whether the respective surcharges should be considered as resisting sliding and overturning of the wall. Backfilling with a clay soil instead of sand can increase the load by double or more, while going from an 8-foot to a 10-foot wall, just a 25% height increase, adds 50% to the lateral pressure. Our H3C Headwall is a precast concrete headwall to suit plastic or clay pipes up to 300mm and concrete pipes up to 225mm. I have a question as well regarding the standards of constructing a timber retaining wall. 4 Surcharge Loads 4. Live load consists of the applied moving load of vehicles, cars, trains, pedestrians, etc. distributed surcharge \i Tl 1111 Ml I Retaining wall Pressure due to equivalent surcharge Pressure due to backfill only Figure 1. Surcharge load on plan Surcharge = 10. LOAD: Weight of wall and footing. DESIGN METHODOLOGIES OF RE WALL 1. The live load surcharge is found by taking. Louis County. Free retaining wall software download. Use Redi-Rock Wall to analyze your specific project. 2 L and T walls. – 3 unit system with 7 unique face dimensions. BASIC DESIGN: Formation level = m Foundation level = m Height of the wall above the Ground Level = m Depth of foundation below Ground level = m. The HL93 “design truck” wheel load is the same as the HS20 wheel load. ARCH 331 Note Set 27. And dependent on the situation of strip load surcharge, we present four kinds of distribution. engineering a retaining wall - this old house. Soil-Reinforced Segmental Retaining Walls. Typical lateral loads would be a wind load against a facade, an earthquake, the earth pressure against a beach front retaining wall or the earth pressure against a basement wall. 1 through 1807. Live load does not include wind or seismic loading. RetainWall is a software mainly developed for the purpose of designing a concrete or masonry retaining wall. Bridge Abutment Design March 17, 2015 Page 9. Drainage A vertical layer of free draining material must be placed immediately behind the wall to dissipate the build-up of groundwater which otherwise would add to the load carried by the structure. 8 of the BDG for the arch stem walls and wingwalls (see section 7. 1 OCTOBER, 1908 No. Therefore, the use of γ. 0 kN/m Applied horizontal live load on wall ; Flive = 0. 050 – Fences, Retaining Walls and Rockeries. In the conventional design of retaining walls and bridge abutments, the lateral earth pressure due to live load surcharge is estimated by replacing the actual highway loads with a 600 mm layer of backfill. Bridge Manual Page: 1. Retaining wall shall not exceed 5'-4" max. Ful l specified in Subsection 403. The final earth pressure calculations can then be made which will incorporate the design life of the wall and the. Load Factor 4. o This also applies to live load surcharge (LS) load applied for Strength Ia Limit State (sliding and eccentricity). The matter to be determined 1. 1 GENERAL REQUIREMENTS. Level backfill with 2 ft. 1 through 1807. 16 Abstract of Dissertation Presented to the Graduate School of the University of Florida in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy DEVELOPMENT OF LRFD LOAD AND RESISTANCE FACTORS FOR EXTERNAL STABILITY OF MECHANICALLY STABILIZED EARTH RETAINING WALLS AND RISK ASSESSMENT By Scott Joseph Wasman August 2013. Reon retaining walls are classified as Precast Modular lock Walls or PM Ws. 3 and a live load combination factor of yc = 0. The new SM1600 design loading of the draft Australian Bridge Design Code AS 5100 is complex. As a result, elastic approach has a significant difference with real values. 90 Strength Ia gLS gES gEH (Active) gEV gDC Group Surcharge Loads Earth surcharge AASHTO Section 3. Large surcharge loads are induced on retaining walls in close proximity to track. RETAINING WALLS LARGE BATTER WALLS. The use of the accompanying lane factors, together with the different uniform lane loads associated with the M1600 and S1600 design. Below we will take a look at the impact on concrete cost of the two design methods for a 9. 1of this chapter. In the conventional design of retaining walls and bridge abutments, the lateral earth pressure due to live load surcharge is estimated by replacing the actual highway loads with a 600 mm layer of b. 333 for a soil having ϕ = 300 or may take value 0. I-wall: A special case of a cantilevered wall con-sisting of sheet piling in the embedded depth and a monolithic concrete wall in the exposed height. Such surcharges can include buildings, highways, or railroads. design h table of reinforcing steel, dimensions and data notes: 4' 6' 8' 10' 12' str: b', q ponding. It is concluded that the effects of wall friction should be included when flexible bulkheads with granular surcharges are designed. Retaining walls are as the name suggests any wall that is designed to retain any material. Models have been developed to represent the horizontal load surcharges on abutment walls, wing walls and other earth retaining structures due to traffic loads. CONCRETE STRUCTURES SDC-103 Structure Excavation & Backfill (2) SDC-105 Masonry Wall SDC-107 Retaining Wall Notes SDC-108 Retaining Wall Details C-1 Masonry Retaining Wall Type 1 (Level Backfill) C-2 Masonry Retaining Wall Type 2 (Live Load Surcharge or Slope Backfill) C-3 Masonry Retaining Wall Type 3 (Level Backfill) C-4 Masonry Retaining Wall Type 4 (Live Load Surcharge or. 0 KN/m Arm = 3. For retaining wall design, the applicable train live-load surcharge is the Cooper E80, which can be approximated as 1,880 pounds per square foot per foot (psf/ft) of rail【Get Price】. Sketches of the retaining wall forces should be considered to properly distinguish the different forces acting on our retaining wall as tackled in the previous article, Retaining Wall: A Design Approach. engineering a retaining wall - this old house. Major loads that act on retaining walls are listed below: Self-weight of retaining wall; Lateral earth pressure (active, passive or at-rest pressure) Vertical earth pressure (on heel and toe of retaining wall) Vertical live load; Horizontal Live load Surcharge; Horizontal Water pressure; Buoyancy or Uplift due to water table. = Dead load surcharge V 2 = Live load surcharge Where: μ: is the external friction angle= min [tan φ f, tan φ r, or (for continuous reinforcement) tan ρ] φ f: Angle of internal friction of retained fill. conventional retaining walls that do not incorporate geosynthetic reinforcement, such as inter locking concrete block walls, gabion walls, steel bin walls, log cribs, and cast-in-place concrete cantilever walls; it may be required to design for a vehicle live load surcharge that is possibly greater than a ministry standard bridge design. walls either perpendicular or parallel to the roadway. 17 ft Strip Load (qS) 0. construction of a retaining wall does not require a building consent when it is less than 1. Retaining structures Generally speaking, any wall that sustains significant lateral … earth pressure + water pressure + pressure due to live loads or surcharge. It can be either dead loads for example sloping backfill above the wall height or live load which could result from highway or parking lot, paving or adjacent footing. The retaining wall retains less than 4 feet of material with or without a surcharge, unless the surcharge is caused by a building. Methods for analysing the effects of live load surcharges on abutments, wing walls and other earth retaining structures have been developed corresponding to the load models in the UK National. high whose horizontal surface is subject to a live load surcharge of 400 psf. Your wall may need additional support if a surcharge is present. Overturning Results. But it doesnt hurt to ask. measured from the bottom of the footing to the top of the wall, unless supporting a surcharge. If it is just an open area but you expect some extremely light live loads then 20 to 30 psf. ©TIMBER QUEENSLAND LIMITED TECHNICAL DATA SHEET 9 TIMBER RETAINING WALLS Revised March 2014 Page 3 BATTER Gravitational forces cause the backfill to slide towards the wall. Submissions to include all necessary items to provide for installation of the required retaining wall systems including but not necessarily limited to:. Greco (1999, 2003, 2005 and 2006) applied Coulomb's theory to investigate the. Loads applied on the wall may consist of self weight, soil pressure, water pressure, live and seismic loads. 0 Retained Soil Native N/A 28. 2 L and T walls. 7 psf Loads on Walls kemin. 600 Earth, H 1. Area/All Floors Area — Largest Floor Height of Structure Max. Each program allows you to create custom reports that are easily exported into Microsoft programs; great design in an easy to read format. Great geotech type problem for the PE exam!! Head to www. SoilStructure RAPID RETAIN, version 3 is a tool for designing Abutment Wall, Wing Wall, Cantilever Retaining Wall & Basement Wall. Caterpillar Equipment Caterpillar Incorporated, also known as CAT is a United States based corporation that is based in Peoria, Illinois. Alternative design procedures justified in a geotechnical report may also be approved. Developer is responsible for retaining wall. Typical lateral loads would be a wind load against a facade, an earthquake, the earth pressure against a beach front retaining wall or the earth pressure against a basement wall. Lateral pressures for walls supporting sloping backfill or surcharge loads must be determined by a Geotechnical Report. ) The Bridge Office has revised its policy regarding the traffic barrier. Soil Arching - Braced Excavations 58. Alongside a railroad very large surcharges may occur. SLOPE REDUCTION FACTORS. 5 kips/ft (including slab self-weight) reasonable value for example purposes; determine load path and sum loads to get value Total service-level vertical live load on wall = 1. The system of grooves and ridges on Grande blocks allows for the construction of walls with three possible setbacks (0 degrees, 9 degrees and 17 degrees) for greater stability. Load Factor 4. Make sure to place the correct loading in the applicable areas behind the wall. A surcharge load results from forces that are applied along the surface of the backfill behind the wall. Soil-Reinforced Segmental Retaining Walls. It was found that with the larger life load surcharge recommended by the AASHTO specification for shorter walls compared to the taller walls, the resistance factors are still. Prior to completing any retaining wall design, it is first necessary to calculate the forces acting on the wall. In fact, there’s a relationship between these two. Bridge Manual Retaining Walls - Section 3. 808-813, 2002. 0 Axial Load Applied to Stem Wall to Ftg CL Dist = 0. Design-by-experience. The unit weight of the retained earth is 18 kN/m3 and the angle of repose is 300. The live load surcharge behind the stem and the weight of the fill supported by the heel are The active earth pressure behind the wall, acting at a height of H /3 above the base, is where. VI Surcharges Loads, in addition to the earth pressures, are called surcharges. Equivalent Surcharge and shows a 2 foot (scaled; not specified) fill on top of a retaining wall backfill. Slip circle failure: sometimes encountered wit cantilever wall in clay soils particularly if there is a heavy surcharge. 15 ksf Dist. neglect any live loads as part of the resisting set of forces in design. The input item TOP WALL TO BEG LL SURCH is no longer used to determine the application of live load surcharge. 2 Retaining Walls. 5 m high and 'does not support any surcharge or any load additional to the load of that ground (for example, the load of the vehicles on a road)'. SPW 911 has as a default a uniform live load of 200 psf. The stem may also have concentrated loads at the top. 4 Surcharge Loads 4. 0 Levelling Pad Soil Granular A N/A 36. The use of the accompanying lane factors, together with the different uniform lane loads associated with the M1600 and S1600 design. Retaining walls require thought and planning just like any other building project. For this demonstration a uniform homogeneous embankment slope of 2H:1V supporting a roadway with highway loading (250 psf uniform vertical surcharge) is assumed. Motta, Generalized Coulomb Active???Earth Pressure for Distanced Surcharge, Journal of Geotechnical Engineering, vol. In a garage floor buildup application, the footing depth needs to be as deep as shown perhaps deeper in order to counter the surcharge load caused by the added fills material. A retaining wall is then mainly exposed to lateral pressures from the retained soil plus any other surcharge. • proximate live-load surcharge from buildings, highways, etc. Bathurst b. to Load End (x2) 10. The recommended lateral earth pressures for design of the drainage channel retaining wall, expressed in equivalent fluid pressures of pounds per square foot per foot of. In the conventional design of retaining walls and bridge abutments, the lateral earth pressure due to live load surcharge is estimated by replacing the actual highway loads with a 600 mm layer of b. Loading will be applied from the backfill, surcharge and braking loads on top of the wall. How loadings Applied to Retaining Wall 2-5000 Ib wheel loads 4 feet apart. Geo-grid table-level, soil backfill, no surcharge Approved geo-grid for Rockwood retaining wall construction in St. 7 psf Lateral Load Applied to Stem Surcharge Over Heel = psf Adjacent Footing Load = 0. Retaining wall design examples with DeepEx. An example of a live load might be a fully loaded semi-truck traveling along a. ) Horizontal Loads and Moments. Retaining Walls. Cantilever Wall Failure. Methods for analysing the effects of live load surcharges on abutments, wing walls and other earth retaining structures have been developed corresponding to the load models in the UK National. These models have been developed based on an analysis of the global and local effects of the traffic loads in the UK National Annex to BS EN1991-2, and are different from the uniform. Also for Detail A, you can have the column concentric on wall. A load such as a Carpark for normal vehicles adds a surcharge of 2. Because many of the recommended repair are so expensive, we all live with a lot more ancient failed retaining walls that never get replaced. The weight of a building or another retaining. A live load surcharge shall be applied where vehicular load is expected to act on the surface of the backfill within a distance equal to one-half the wall height behind the back face of the wall. segmental gravity retaining walls and cantilever retaining walls). Due to heavy loadings, both horizontal impact & vertical live load surcharges in excess of 25kPa, Keystone & Steel ladders were adopted due to inherent positive connection strengths and unique inextensible steel soil reinforcement. com for more including a great practice exam. It can be either dead loads, for example, sloping backfill above the wall height or live load, which could result from the highway or parking lot, paving, or adjacent footing. 0 kN/m Applied horizontal live load on wall Flive = 0. Design MSE walls to resist horizontal loadings resulting from live load uniform p r e su of ta c nvm l y i. The live load surcharge behind the stem and the weight of the fill supported by the heel are The active earth pressure behind the wall, acting at a height of H /3 above the base, is where. In conventional design of retaining walls and bridge abutments, lateral earth pressure due to live load surcharge is estimated by replacing the actual highway loads with a 600 mm layer of backfill. Backfilling with a clay soil instead of sand can increase the load by double or more, while going from an 8-foot to a 10-foot wall, just a 25% height increase, adds 50% to the lateral pressure. Use Redi-Rock Wall to analyze your specific project. s -Percentage of steel area on each of masonry / mass concrete. Retaining wall & privacy wall definitions: this article defines retaining wall, barrier or privacy wall, and key retaining wall terms such as wall surcharge and types of retaining wall construction. 90 Strength Ia gLS gES gEH (Active) gEV gDC Group Surcharge Loads Earth surcharge AASHTO Section 3. 8 Load at the connection to the face of the wall. 2002 E6202 E3. Calculation Reference Geotechnics. Dredge side: A generic term referring to the side of a retaining wall with the lower soil surface elevation or to the side of a floodwall with the. Using the equivalent bending moment technique, they proposed an analytical approach to calculate the active horizontal pressure on retaining walls. Checking this box will include heel surcharge. DeepEX can design retaining walls with many different wall and support types. ES = earth surcharge load EV = earth fill vertical pressure BR = braking force CE = centrifugal force CR = creep CT = vehicular collision force CV = vessel collision force EQ = earthquake FR = friction IC = ice load IM = dynamic load allowance LL = live load LS = live load surcharge PL = pedestrian live load SE = settlement SH = shrinkage TG. 4 – construct the actual rapid transit surcharge. Standard L wall units are designed in accordance with AS 4678-2002: Earth retaining structures, for a live load surcharge. 0 kN/m2 Applied vertical dead load on wall Wdead = 85. Design of Semi gravity Retaining Walls 1 A semi gravity retaining wall consisting of plain concrete (weight = When surcharge is present, it will be included as an additional depth of soil, as shown in the considered to be live load forces, a load factor of 1. Surcharge Ð Any loading imposed on the soil behind the wall that exerts an additional force on a wall structure. Retaining Walls. Two conditions are considered when applying the effect of the vertical component of live load surcharge. All calculations in the retaining wall software for structural engineering are done easily, quickly and accurately. A number of alternative retaining wall systems were considered, including steel sheet pile walls, pile and slurry walls, diaphragm walls and secant pile walls. The development of soil arching or other means of reducing load on the bulkhead was evident. The coefficient of friction between the base and the soil is 0. Note: Any loads applied to the top of the wall footing will be considered as the load category they are applied as. In a garage floor buildup application, the footing depth needs to be as deep as shown perhaps deeper in order to counter the surcharge load caused by the added fills material. The wall supplier will size the wall to meet internal and external stability requirements. Surcharge loads acting on retaining wall are additional vertical loads that used to the backfill soil above the top of the wall. I have to design a stepped retaining wall for 22m height. • From Manure. Surcharge Loads Adjacent Footing Load 0. Surcharge – Any loading imposed on the soil behind the wall that exerts an additional force on a wall structure. 5 Lateral Pressure on Retaining Walls, 393. 00 ft Footing Depth 1. Design Procedure for Cantilever Retaining Walls 24. This surcharge shall apply as a rectangular distribution to the full height of shoring. UniBear performs analysis based on Working Stress, Limit States based on OHBDC 1991, Load Factor based on AASHTO 1992, and Partial Factor based on European codes. Usually are sufficiently massive to be unreinforced. Effect of water: Ground water behind a retaining wall, whether static or percolating through a subsoil, can have adverse effects upon the design and stability. Cantilever retaining wall analysis 54. This checklist may also be used by someone checking a design to provide an outline for a consistent review process. For taller walls, it will also be necessary to utilize a soil engineer or geologist to ensure the surcharge of the soil is retained by the proper type of retaining wall and built within standard engineering practices. β Retaining Wall Backfill Surface Inclination β Areal Load to Retaining Wall Inclination Y Earth Unit weight Y w Unit Weight of Water δ Retaining Wall Roughness Coefficient σ h Horizontal Earth Pressure σ H Horizontal Pressure Due to Uniform Surcharge φ Friction Angle φ' Friction Angle Based on Effective Stresses 1. 0 Lateral Load Applied to Stem Surcharge Over Heel = psf Adjacent Footing Load = 0. (b) Geosynthetic reinforced retaining wall with surcharge and live load 8 INTERNAL STABILITY : 9. In conventional design of retaining walls and bridge abutments, lateral earth pressure due to live load surcharge is estimated by replacing the actual highway loads with a 600 mm layer of backfill. Typically, Z-section sheet piles will be supplied by Arcelor Mittal or Emirates Steel since both steel manufacturers have BES6001 Responsible Sourcing of Construction Products which is mandatory. ©Timber Queensland Technical Data Sheet 9 - Timber Retaining Walls Revised March 2006 - Page 3 and possibly wall failure. surcharge load and retained soil type. Product: AB Europa Collection, AB Abbey Blend Pattern. 5 ft (From Table 1) = 105 psf. Lateral Forces on Retaining WallsENCE 454 ©Assakkaf Design of Retaining Walls - The design of retaining wall must account for all applied loads. 1of this chapter. SPW 911 has as a default a uniform live load of 200 psf. 0 Retained Soil Native N/A 28. 8 Load at the connection to the face of the wall. Surcharge load on plan ; Surcharge = 60. 02 Aesthetics Considerations. Point load surcharges applied at a setback distance greater than 1H. 2 L and T walls. Note that. 1 GENERAL REQUIREMENTS. Any other form of wall will eventually collapse. It is possible to build a stacked rock wall. 00 ft Footing Depth 1. Passive Lateral Earth Pressure Coefficient 4. 02 Aesthetics Considerations. Counterfort Strectcher Headers Filled with soil Face of wall 5. Anchor: #i1024240. Sketch the distribution of active earth pressure on the stem. Two conditions are considered when applying the effect of the vertical component of live load surcharge. Traditional method of estimating lateral pressure due to surcharge load. 5) / 100) / 2 = 2. If you expect large gatheri. Design loads and load combinations must be in accordance with AS 5100, but with a minimum uniformly distributed live traffic load (UDL) of 20 kPa for the serviceability limit state. Load Weight or pressure placed on a retaining wall or soils – usually from the back or top. A wall number is assigned as per criteria discussed in. Area/All Floors Area — Largest Floor Height of Structure Max. This video webinar provides an overview of using the TensarSoil Software to design MSE retaining walls. However elastic methods will yield a horizontal force for any surcharge applied at any distance behind the retaining wall. 1 -Pressure due to Live load and Dead load surcharge on return walls. Caterpillar Equipment Caterpillar Incorporated, also known as CAT is a United States based corporation that is based in Peoria, Illinois. Different techniques are required if the rock wall is to be a retaining wall or just a fence type wall. In this situation, it might be advisable to deselect this checkbox. Surcharge may be coming on the soil from a dead load or live load. A wood retaining wall can fix this problem but it. Bridge Manual Page: 1. Loads and Load Combinations. The final earth pressure calculations can then be made which will incorporate the design life of the wall and the. LOAD: Lateral soil and equipment surcharge. Live load surcharge loads applied beyond a distance of 2H behind the wall may be The Background information for limitations on the use of WSDOT Standard Plan Reinforced Concrete Retaining Walls and Traffic Barrier Details for Reinforced Concrete Retaining Walls are: 1. Retaining wall shall be designed to withstand lateral earth and water pressures, including any live and dead load surcharge, the self weight of the wall, temperature and shrinkage effect, live load and collision forces, and earthquake loads in accordance with the general principles of AASHTO Section 5 and the general principles specified in this article. In the conventional design of retaining walls and bridge abutments, the lateral earth pressure due to live load surcharge is estimated by replacing the actual highway loads with a 600 mm layer of b. The retaining wall is assumed to be vertical, further calculations in future will incorporate wall slope toward the soil. Defining importance levels for the design of retaining walls Defining importance levels for the design of retaining walls. Retaining Wall Design 4. Each and every retaining wall designs RCE have delivered processes through careful assessment of physical, structural and geotechnical conditions relevant to the site and project. 00 Base Shear Keyway - Not Used Heel Reinforcement Bar Size #4. • Elsewhere …. 96 kN/m 2) in accordance with Section 1607. 3 Live Load Traffic Surcharge (LS) 13 3. Retaining wall development is described in Section 11-55-5 of the. Dead load surcharges, on the other hand, are considered to contribute to both destabilizing and stabilizing forces since they are usually of constant magnitude and are present for the life of the structure. modeled as uniform surcharge (LS), q , and are factored using load factors. 5kN/m 2 which should not cause any issues with the standard designs. Loads on Retaining Walls. 8 - axle spacing in feet. Loads due to live load surcharge must be applied when a vehicular live load acts on the backfill surface behind the back face within one-half the wall height. 35 kPa will not be the governing case. Wall Pressure Analysis 59. Comparision between Optimization and Conventional Catilever Retaining Wall by Using Optimtool in Matlab Sable K. Reon retaining walls are classified as Precast Modular lock Walls or PM Ws. Strata Systems has ample experience with building strong retaining walls for both temporary and permanent retaining wall applications. Kim and Barker studied the impact of live surcharge caused by traffic load on retaining walls. The ASCE 7-16 equations for determining the reduced live load based on the influence area are as follows: where. The general guideline below is specific to embedded retaining wall. As it is known, all these steps are in interaction each other. 8 Load at the connection to the face of the wall. SPW 911 has as a default a uniform live load of 200 psf. so i want to go for stepped retaining wall but i am unable to find any reasonable data or guideline for this. Note that. Lateral pressures for walls supporting sloping backfill or surcharge loads must be determined by a Geotechnical Report. Manure side: Empty Backfill side. Major loads that act on retaining walls are listed below: Self-weight of retaining wall; Lateral earth pressure (active, passive or at-rest pressure) Vertical earth pressure (on heel and toe of retaining wall) Vertical live load; Horizontal Live load Surcharge; Horizontal Water pressure; Buoyancy or Uplift due to water table. Design MSE walls for live load surcharge (LS) located at the top. RE: Traffic (live load) surcharges on retaining walls fndn (Geotechnical) 4 Nov 05 15:01 Sometimes the 250 psf vertical stress is converted to 80 psf equivalent fluid pressure and may be added to the equivalent active soil backfill pressure of 35 to 50 psf. The horizontal surface of back fill is subjected to a live load surcharge of 20 kN/m2. Surcharge can greatly impact the wall design. Live Load Surcharge Vertical Earth Pressure from Earth Fill Weight Horizontal Earth Fill Pressure Dead Load of Structure Components 1. 8 of the BDG for the arch stem walls and wingwalls (see section 7. 8 Wind Loads 10 For Earth Loads - Retaining Walls, which set out a other structure supported by the retaining wall. 0 kN/m Applied horizontal live load on wall Flive = 0. It is necessary to consider the effect of only one track. 0 kN/m Applied vertical live load on wall ; Wlive = 5. It can be either dead loads, for example, sloping backfill above the wall height or live load, which could result from the highway or parking lot, paving, or adjacent footing. You will receive free limited license of UniBear 1. Here's the link. Horizontal and vertical alignments of the retaining wall are established by construction of a leveling pad at the base of the face. Supports and external loads can be added on the model graphically or using the user-friendly Model Wizard. 3 of ASCE 7-16 permits a reduction of live loads for members that have an influence area of A I ≥ 37. condition and a retaining wall in another. You would also model the counterforts out of shell elements. Geo-grid table-Level, clean rock backfill, 200 psf live load surcharge Approved geo-grid for Rockwood retaining wall construction in St. Allan Block Manufacturer: Expocrete - British Columbia, Canada. The following loading types are employed in this work: point load, line load, uniform strip load, upward linear-varying strip load, upward nonlinear-. KEYSTONE WALL SYSTEM The Keystone wall system is designed specifically for the construction of large-scale retaining walls. See the second graphic for showing surcharges like sloped soil or a live load surcharge like a vehicle and hydrostatic water pressure. (8) ‘Traction’ means the longitudinal live load arising from braking and acceleration of vehicles. 3 ft Pemin kemin We depth Pemin 373. The horizontal surface of backfill IS subjected to a live load surcharge of 20 kN/m2, The safe bearing capacity of soil IS 200 kN/m2. 1a Loads on Top Slab deadl We h 200 ld Ws deadl 977. Offline David S Tue, Jul 5 2016 2:31 PM. ecause it is by definition temporary, any stabilizing contribution of a live-load sur-. In behind of Retaining wall in Backfill Pressure and Live Load Surcharge and Self-weight of abutment & load due to Backfill at base of stem. Live load - surchages that move (cars, trucks) Dead Load - Surcharges that are stationary (buildings / structures) Offset - how far back off the wall these items will be. In this section we will take a simple cantilever retaining wall and discuss the concept of how they are affected by the loads and how you have to design them to resist these loads that they are subjected to. The retaining wall is assumed to be vertical, further calculations in future will incorporate wall slope toward the soil. In New England where I live the frost line is 4 feet deep, so I have used that depth in the diagram. retaining walls is a retained material to move downslope due to gravity force. We limit it to. As a result, elastic approach has a significant difference with real values. (b) level backfill with surcharge P P a ′ (c) Sloped backfill without surcharge. A 15 ft Retaining Wall with a 16" thick footing (H=16. (8) ‘Traction’ means the longitudinal live load arising from braking and acceleration of vehicles. To compute surcharge load on retaining wall, you can see the attached document that provides some guideline. The impact of surcharge loads on retaining walls. Minimum Design Live Load of 150 psf shall be used for all walls supporting parking areas. A sheet pile wall example will be analyzed with DeepEX. Kim and Barker studied the impact of live surcharge caused by traffic load on retaining walls. : G-17-025 6 Where the design includes unrestrained walls, above any free water, with level backfill and no surcharge loads, we recommend the wall be designed to resist an earth pressure with the distribution shown below:. If you have not read Part 1 and Part 2, I would suggest you read those before continuing with this section. Retaining walls are extensively used in the. 5 ft (From Table 1) = 105 psf. This original recommendation was made several decades ago when the highway truck loads were much lighter. Lateral Loads Most lateral loads are live loads whose main component is a horizontal force acting on the structure. BUILDING CHARACTERISTICS cu. Default lateral soil load for the design of basement and retaining walls supporting level backfill shall be 40 psf/ft for laterally unrestrained retaining walls and 60 psf/ft for laterally restrained retaining walls. DeepEX can design retaining walls with many different wall and support types. 1 illustrates that depending upon wall height, StoneWall SELECT SRWs offer a 25 to 50 % cost savings over conventional cast-in-place concrete retaining walls. surcharge live loads) when used with SlimWall • Can retain up to 750mm of soil (2. Ful l specified in Subsection 403. Railway Road Retaining walls. We include definitions of important retaining wall terms such as wall surcharge, and we provide diagnostic descriptions & photographs of types of damage to retaining walls & privacy walls. J Geotech Geoenviron Eng 128(10):803–813 CrossRef Google Scholar. A surcharge load results from forces that are applied along the surface of the backfill behind the wall. Structures Design Guidelines Topic No. For roofs, this exception only applies when the metal sheets have no roof covering. 7 psf Loads on Walls kemin. Driveways, parking lots, equipment, etc, are examples of surcharges in a basement wall. Use the Spangler Method of analysis (area load of finite length) or Boussinesq Method of analysis. 4 EXAMPLE 3 DESIGN OF SHEET PILE WALL WITH TWO SOIL AND SURCHARGE LOAD A sheet pile wall is required to support 2 excavation. It is possible to build a stacked rock wall. Wall batter is achieved by stacking blocks on a. The new SM1600 design loading of the draft Australian Bridge Design Code AS 5100 is complex. In most cases, abutments, piers, and walls are. ARCH 331 Note Set 27. 1 DESCRIPTION Landscape retaining walls as defined by KDOT consist of systems meeting all of the following requirements: a total height less than 6 feet measured from top of footing to top of wall cap at the highest point; the maximum live load surcharge of 100 pound per square foot;. to be done after removal backfill sufficiently to prevent of wall forms and before backfilling c bars d bars o o ser: b', q' o lol fs retaining wall configuration optional key load surcharge variable live place concrete in toe. Kim and Barker [14] studied the impact of live surcharge caused by traffic load on retaining walls. Sketch the distribution of active earth pressure on the stem. RIDGI posts are available in the following lengths: 0. For now we will just take a look from a temporary works perspective and assess what effect a surcharge will have in terms of additional loads on the shoring that supports the wall. Surcharge load on plan Surcharge = 10. It is mainly a rigid structure(except gravity retaining wall) which is. 8 Effect of Surcharge, 402. Lateral live load deflection shall be limited to 3/8” for shoring located within 18’-0” of centerline of track and ½” for shoring located outside 18’-0”. Surcharges. Checking this box will include heel surcharge. (i) Sloping Ground to resulting higher gravity and live loads that will exceed the design loads assumed for the tables. Per AASHTO, I'm using the equivalent of 2 ft of soil for the surcharge. As for this height, cantilever retaining wall is not recommended and counter fort retaining wall is not economical. Berrak Teymur RETAINING WALLS are usually built to hold back soil mass 1. There is a proximate live-load surcharge whichmust remain in place. 25 ft Additional Loads and Moments Lateral Loads Dist. Size: 25,000 ft 2 (2325 m 2) Local Engineer: Golder Associates. The researchers proposed an analytical approach to calculate horizontal active pressure on retaining wall using equivalent bending moment method. AASHTO LRFD Section 11 Abutments, Piers, and Walls AASHTO Section 11 Design specifications for: Conventional gravity/semigravity walls Non-gravity cantilevered walls Anchored walls Mechanically Stabilized Earth (MSE) walls Prefabricated modular walls Common Load Groups for Walls Load Definitions DC - dead load of structural components and attachments EV - vertical pressure from dead load. 1 Retaining Walls 8. Sheet Pile Wall Example with DeepEX. In most cases, abutments, piers, and walls are. An example might be a fully loaded semi truck traveling along a roadway within close proximi-ty to the finished SRW. 2 Earth Surcharge (ES) 12 3. Retaining wall to conform to all local building codes. condition and a retaining wall in another. It analyses the stability of the wall based on the loads and resistances, and results in bearing pressure, sliding, overturning and rotational stabilities. (780 CMR § 1825. When the stem extends above backfill the retaining wall may be exposed to wind load. Your wall may need additional support if a surcharge is present. One of the challenges of the construction was access. Minimum Design Live Load of 150 psf shall be used for all walls supporting parking areas. Usually expressed in pounds per square foot. Usually expressed in pounds per square foot. be equal to the maximum force in the reinforcement (Tmax) independently of the facing. 2 Live load surcharge AASHTO 3. Analysis of Steel Column Base Plate 63. Retaining wall design using applied soil loads, live loads, dead loads, and surcharge loads due to adjacent vehicle loads. 00 Base Shear Keyway - Not Used Heel Reinforcement Bar Size #4. where a semi-gravity wall is shown, the Live Load Surcharge is placed over any element of the ERS for settlement and bearing analysis, while the Live Load Surcharge is placed behind all the elements of the ERS for sliding, and eccentricity analysis. (i) Sloping Ground to resulting higher gravity and live loads that will exceed the design loads assumed for the tables. ) Horizontal Loads and Moments. They are applied to the top of the topmost stem section. (See Figure 4. Uniformly Distributed Surcharges : Live Load Surcharge none Dead Load Surcharge none Friction Cohesion Angle Unit Weight Soil Data : Soil Description: (kPa) (degrees) (kN/m3) Reinforced Soil Granular B N/A 34. Design Procedure for Cantilever Retaining Walls 24. The rationale for these changes and. Submit two (2) separate sets of detailed retaining wall construction plans drawn to scale containing the following information: Provide an introductory discussion about the project and retaining wall(s). Usually are sufficiently massive to be unreinforced. Therefore, the use of γ. 0 kN/m2 Applied vertical dead load on wall Wdead = 85. 632 (4 of 4) Retaining Wall (Live Load Surcharge) Pile Footing Reinforcement Details 5-297. Facilities Development Manual. As for this height, cantilever retaining wall is not recommended and counter fort retaining wall is not economical. 2002 E6202 E3. Geo-grid table-level, soil backfill, no surcharge Approved geo-grid for Rockwood retaining wall construction in St. Our heavy duty commercial grade TerraFirm XL panel is capable of retaining up to 3. Concrete Ecology blocks can be quickly deployed and used as a permanent retaining wall, or dismantled and reused. ClassPresent Proposed Est. A study was also undertaken on the effect of the life load surcharge on the resistance factors. Design-Build 48-Hour Replacement of LIRR’s Design New Retaining Walls for Train Surcharge 14. LIVE LOAD SURCHARGE (LS) Bridge Abutment Design March 17, 2015 6. Q,fav = 0 is not so much due to uncertainty, but to establish an absolute case that the live load is not present. 1 MSE Wall Horizontal Earth Pressure (EH) 11 3. Where uniform roof live loads are reduced to less than 20 psf (0. Surcharge Loads: The term "surcharge" refers to an additional loading on the proposed wall system. Self weight of retaining wall; Vertical earth pressure (on toe and heel of retaining wall) Lateral earth pressure (active, passive or at-rest pressure) Vertical live load; Horizontal Live load Surcharge; Horizontal Water pressure; Buoyancy or Uplift due to water table. • Elsewhere …. The liquid lim­ it was 17 and the plasticity index, 4. It is possible to build a stacked rock wall. residual resultant of the previous loading history, including loading during construction. One of the challenges of the construction was access. Geotechnical - Load and Resistance Factor Design By Mir Zaheer, P. ii) All dimensions are in meters 8. The Live Load Surcharge is positioned to produce the maximum design load. LIVE LOADS (EQUIPMENT) LOAD FACTORS STRENGTH REDUCTION FACTOR VARIES FROM 0. Because these same modular walls systems are also used to accommodate a wide range of acoustic panels, the incorporation of the TerraFirm panel can be used to create walls that serve as both noise. Live Load Surcharge Retaining walls supporting road pavement were designed for a surcharge live load of 20kPa, which diminishes over the height of the wall in accordance with AS5100. Passive Lateral Earth Pressure Coefficient 4. 0 Lateral Load Applied to Stem Surcharge Over Heel = psf Adjacent Footing Load = 0. Surcharge location is 0 feet from shoring/retaining wall Height of retaining wall/shoring is 10 feet Traffic Surcharge 𝑞=𝛾 𝑃×𝐻𝑒𝑞 = 30 pcf (Given in this example) x 3. from Force, top, ft kips Car impact load 0. Cantilever Wall Failure. Surcharge load on plan ; Surcharge = 60. 1 General – The MSE wall design and submittals shall be in accordance with AASHTO LRFD Bridge Design Specifications 4th Edition 2007 (2009 Interim) Section 11, with materials and installation in accordance with Section 7 of AASHTO LRFD Bridge Construction Specifications 2nd. Could you please provide me some helping material or direct me ?. 8 - axle spacing in feet. A surcharge load is any load such as spoil embankments, street s or highways, construction machinery which is imposed upon the surface of the soil close enough or distance to the excavation. Vertical loads exist from the dead, live and lateral loads from the structure and the wall itself. Reinforced Concrete Retaining Walls with Level or Surcharged Backfill : Determines required footing width, footing thickness, wall thickness and reinforcement areas for retaining walls with a level backfill, with or without a surcharge. It is common practice to include as a minimum, a uni-form live load of 200-300 psf to account for materials stor- age and construction machinery near to the wall. Retaining structures Generally speaking, any wall that sustains significant lateral … earth pressure + water pressure + pressure due to live loads or surcharge. A live load is assumed to. Geo-grid table-level, soil backfill, no surcharge Approved geo-grid for Rockwood retaining wall construction in St. Note that the Live. This minimum UDL must be applied on the road which represents the most adverse loading condition for the retaining structure. Surcharge Loads Stem + Footing Height 5. systems are designed to carry dead and live loads, as well as withstand wind and seismic activity. Surcharge can greatly impact the wall design. When walls must be placed on slopes, conduct both short- and long-term stability analyses using appropriate soil strengths, geometry, and loading conditions (live load surcharge, hydrostatic, etc. This video webinar provides an overview of using the TensarSoil Software to design MSE retaining walls. Lateral pressures for walls supporting sloping backfill or surcharge loads must be determined by a Geotechnical Report. Ultimately, this results in a more conservative design with an improvement in the overall safety factors for certain aspects of the wall design. Bridge Manual Retaining Walls - Section 3. When a Building Permit is Required A building permit can usually be issued over the counter when two copies of the following are. In conventional design of retaining walls and bridge abutments, lateral earth pressure due to live load surcharge is estimated by replacing the actual highway loads with a 600 mm layer of backfill. to be done after removal backfill sufficiently to prevent of wall forms and before backfilling c bars d bars o o ser: b', q' o lol fs retaining wall configuration optional key load surcharge variable live place concrete in toe. within the style of concrete gravity wall, it's essential to work out the masses needed within the stability and stress analyses that are weight of wall (dead load or helpful force), lateral earth pressure (static and dynamic), surcharge load (live traffic load), earthquake forces (inertia forces) , and. The researchers proposed an analytical approach to calculate horizontal active pressure on retaining wall using equivalent bending moment method. and reinforcement type. Design and Construction of Stone Masonry Retaining Walls – A Quick Guide 9 Department of Engineering Services Table 5: Standard Design with soil surcharge load Note: i) surcharge load implies load from the soil surcharge which is assumed as a sloping angle as shown in figure 1. 5 -20' 5+50 o œ—œ. 333 x 24 x 11. Railway Road Retaining walls. Magnitude of the surcharge load is the product of the pavement thickness, 12 in. Loads applied within a horizontal distance equal to wall stem height, measured from the back face of the wall shall be considered as a surcharge. 7 psf Lateral Load Applied to Stem Surcharge Over Heel = psf Adjacent Footing Load = 0. Note that. RE: Traffic (live load) surcharges on retaining walls shockstressed (Structural) 7 Mar 06 09:56 The input then is for the maximum load to be encountered and worse, after that you can sleep at night instead of seeing walls slipping down hills in a mudwash with odd lorries floating after it. 5 kips/ft (including slab self-weight) reasonable value for example purposes; determine load path and sum loads to get value Total service-level vertical live load on wall = 1. Prior to completing any retaining wall design, it is first necessary to calculate the forces acting on the wall. • Elsewhere …. When the stem extends above backfill the retaining wall may be exposed to wind load. 1 AFFILIATED INSTITUTIONS ANNA UNIVERSITY CHENNAI : : CHENNAI 600 025 REGULATIONS - 2008 VI TO VIII SEMESTERS AND ELECTIVES B. Where the wall is within the influence zone of a live load, a live load surcharge (LS) shall be added to the active earth pressure load between the top of the wall and the Design Grade. There is a proximate live-load surcharge whichmust remain in place. These walls shall be designed by a Professional Engineer subcontracted by the Contractor as a design-build item. Engineering CAD Drawings 500-599 Engineering CAD Drawings and Templates Waste Storage Drawings No. 5 livel 100 impact 145. (780 CMR § 1825. The wall may retain soil or other granular material. from Force, top, ft kips Car impact load 0. of the MSE wall. so i want to go for stepped retaining wall but i am unable to find any reasonable data or guideline for this. The new SM1600 design loading of the draft Australian Bridge Design Code AS 5100 is complex. This seems to be particularly prevalent for hardwood timbers and we believe the reason for this is that the durability and strength of the hardwood timber does not allow it to be fully treated at the time of milling. Allan Block Manufacturer: Expocrete - British Columbia, Canada. 1 Introduction Structures which are to be built adjacent to or under the highway by a private individual/company, developer or other local authority may require structural approval by Oxfordshire County Council as Highway Authority. SLOPE REDUCTION FACTORS. Loads and Load Combinations. live load surcharge (roadway adjacent to top of wall) 3. Also for Detail A, you can have the column concentric on wall. 633 Retaining Wall Concrete Parapet Barrier INSTRUCTIONS: 1. Either way I feel like I need to get a legal advice, but IM also getting conflicting advice from different lawyers, so yeah, fun fun fun. Surcharge loads acting on retaining wall are additional vertical loads that used to the backfill soil above the top of the wall. , an embankment). Reinforced Concrete Retaining Walls with Sloping Backhill. 0 lbs Axial Dead Load has been increased = lbs Footing Type Line Load. backslopes where appropriate. 61 Moment Arm (ft. Vertical loads exist from the dead, live and lateral loads from the structure and the wall itself. "WALLPRES" --- WALL PRESSURE ANALYSIS Program Description: "WALLPRES" is a spreadsheet program written in MS-Excel for the purpose of determining the horizontal (lateral) pressures to be applied to walls from various types of loading including lateral earth pressure, hydrostatic pressure, as well as uniform, point, line, and strip surcharge loadings. Surcharge load on plan Surcharge = 10. when considering retaining wall sliding or ES is the earth pressure from a permanent earth surcharge (e. Looking at the chart above, you can see 20 psf surcharge. Retaining Wall to Support a Fill. Kim JS, Barker RM (2002) Effect of live load surcharge on retaining walls and abutments. Typically, Z-section sheet piles will be supplied by Arcelor Mittal or Emirates Steel since both steel manufacturers have BES6001 Responsible Sourcing of Construction Products which is mandatory. 00 ft Wind on Exposed Stem psf= 0. pressure exerted by live load surcharge on the reinforced soil block Pa3 = Ka2 (wsl) Hd Wsl= Live load surcharge, Hd is design height of the wall; Ka2 is coefficient of active earth pressure due to fill. neglect any live loads as part of the resisting set of forces in design. The extra 500-pound wheel load is not a large increase and will only affect those designs that did not have excess capacity. Cantilever Retaining Walls and Abutments 4. Question Where was the 250 psf Uniform Surcharge originated from? Question Practically, in reality, there is no such a Uniform, Infinite Long Strip Load of 250 psf. The loads considered in design are earth pressure, seismic loads, live load and dead load surcharge — wherever it is relevant. walls either perpendicular or parallel to the roadway. It is necessary to consider the effect of only one track. All utilities that have a potential for leaking. Full text of "Retaining walls of the cantilever and buttress types. 2002 E6202 E3. Submissions to include all necessary items to provide for installation of the required retaining wall systems including but not necessarily limited to:. 0 kN/m 2 Applied vertical dead load on wall ; Wdead = 40. modeled as uniform surcharge (LS), q , and are factored using load factors. RetainWall is a software mainly developed for the purpose of designing a concrete or masonry retaining wall. DeepEX can design retaining walls with many different wall and support types. Caterpillar Equipment Caterpillar Incorporated, also known as CAT is a United States based corporation that is based in Peoria, Illinois. Anchor Bolt anchorage 62. Lateral System Design 2. Abutments and piers are used to requires a special live load. SLIDING SURCHARGE ROOF SNOW DRIFT SURCHARGE A N G L E Note a 15% increase in the allowable capacity of wood for loads that include snow, which is a short-term load Snow Loads 7/12 Cs 0. This presentation helps the people responsible for requesting, specifying, designing, building, and inspecting different types of retaining walls to. Design-Build 48-Hour Replacement of LIRR’s Design New Retaining Walls for Train Surcharge 14. Offset surcharges are always up for some debate. segmental gravity retaining walls and cantilever retaining walls). 0 KN/m Arm = 3. txt) or view presentation slides online. The walls shall be designed in accordance with LRFD and Special Provision 635 which is included at the end of this addendum. This video webinar provides an overview of using the TensarSoil Software to design MSE retaining walls. The stem may also have concentrated loads at the top. Humes L walls are modular cantilever wall units which can be used for earth retaining applications. Design of Geosynthetic-Reinforced Wall L 0 L H z L R L E s v 45+ /2 P 1 P 2(live loads) Surcharge D hs + Soil pressure hq + Surcharge pressure ht = Live load pressure h Total lateral pressure Internal Stability: Step 1 Determine the active pressure distribution ( a)on the wall a = K a v = Ka γz Where K a = Rankine earth oressure coefficient = tan2 (45 - /2) Step 2.
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