QUESTION 5a) A retaining wall is defined as a structure whose primary purpose is to provide lateralsupport for soil or rock. In some cases, such as basement walls and certain types of bridgeabutments, it may also support vertical loads. Evaluate the performance of wall failures in thefollowing retaining walls.1. OverturningII. Bearing on groundIII. Rotational SlipIV. Gravity Walls

A retaining wall is a structure, design to resist the lateral pressure of the soil. Three types of…

QUESTION 5 a) A retaining wall is defined as a structure whose primary purpose is to provide latera support for soil or rock. In some cases, such as basement walls and certain types of bridg abutments, it may also support vertical loads. Evaluate the performance of wall failures in th following retaining walls. I. Overturning II. Bearing on ground III. Rotational Slip IV. Gravity Walls

QUESTION 5 a) A retaining wall is defined as a structure whose primary purpose is to provide latera support for soil or rock. In some cases, such as basement walls and certain types of bridg abutments, it may also support vertical loads. Evaluate the performance of wall failures in th following retaining walls. I. Overturning II. Bearing on ground III. Rotational Slip IV. Gravity Walls

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter13: Lateral Earth Pressure: At-rest, Rankine, And Coulomb

Section: Chapter Questions

Problem 13.25P

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3. Compute the resultant lateral force for the soil-wall system shown in Figure 3. You may ignore tensile cracks. Use •A- Coloumb •B - Rankine +30", y-20&N m Ground water table 7m e-SOKNim, -10,y-18KN/m° +25, y-20KN m Gravity wall Figure 3
A 3-m 150 mm CHB wall rests on a 600 mm thick concrete footing. The CHB wall weighs 3.3 kN/m² and will carry a construction live load of 20 kN per meter length of wall. 24 kN/m3 , 18 kN/m³ , ,fc' = 28 MPa, fy = 248 MPa. Steel %3D %3D cover to bar centroid is 90mm. Pp + Pµ 600 mm Determine the effective soil pressure if the soil bearing capacity is 130 kPa and the top of the footing is 1.0m from the NGL. Determine the required width of the footing. Determine the magnitude of critical moment at the footing and the spacing of the 16 mm bars. 3 m 1 m
A 320 mm thick footing slab supports a 300 mm thick wall carrying uniform service dead load of 235.5 kN/m and service live load of 124.3 kN/m. The base of the wall footing slab is 1.4 m from the ground surface. Use 16 mm diameter for main bars. Design parameters are as follows: γsoil = 16 kN/m3, γconc = 24 kN/m3, qa = 231 kPa, f’c = 27 MPa and fy = 414 MPa. Calculate the allowable nominal beam shear stress in MPa. Express your answer in 3 decimal places.
Find the active lateral force/unit of width and the point of application for a verticalretaining wall with the following data: γ = 110 pcf, Φ= 36° , C = 0 psf, H = 18 ft; Using theCoulomb equation with δ = 20° and (a) horizontal backfill, (b) backfill slope 10° , and (c)backfill slope -10°
].Find the active lateral force/unit of width and the point of application for a verticalretaining wall with the following data: γ = 110 pcf, Φ= 36° , C = 0 psf, H = 18 ft; Using theCoulomb equation with δ = 20° and (a) horizontal backfill, (b) backfill slope 10° , and (c)backfill slope -10°. Do Prob. 1 using the Rankine equations.
300 mm thick footing slab supports a 300 mm thick wall carrying uniform service dead load of 214.31 kN/m and service live load of 145.9 kN/m. The base of the wall footing slab is 1.2 m from the ground surface.Design parameters are as follows: γsoil = 16 kN/m3, γconc = 24 kN/m3, qa = 215.46 kPa, f’c = 27 MPa and fy = 420MPa. 1.Calculate the net allowable bearing capacity of soil in kPa. 2.Calculate the minimum required width of the wall footing slab. 3 Calculate the maximum ultimate moment (kNm) in the slab if the width of footing slab is 2.1 m 4 Calculate the required center to center spacing of 16 mm bars for flexure if the maximum factored moment in thr slab is 75 kN-m 5 Calculate the ultimate beam shear stress on the footing slab if the footing slab is 2.1 m wide.
Question 2: A gravity retaining wall is shown in figure below. Use ô'=2/3¢', and Coulomb's active earth pressure theory. Determine: 1. Factor of safety against overturning; 2. Factor of safety against sliding; 3. The pressure on the soil at the toe and heel. Y = 18.5 kN/m³ 4i = 32° cj = 0 Use Yconcrete = 23.58 kN/m³ Note: For Coulomb method, note that the weight 5 m of the soil above the back face of the wall is not taken into account in the resisting 5.7 m P. moment. 150 2.83 m - ----- Ph 75° 2.167 m 1.5 m 0.27 m 0.6 m 1.53 m 0.8 m C' Y2 = 18 kN/m³ $i = 24° c = 30 kN/m² 0.8 m 0.3 m - 3.5 m %3D
ASAP
13.1 through 13.4 Figure 13.39 shows a retaining wall that is restrained from yield- ing. For each problem, determine the magnitude of the lateral earth force per unit length of the wall. Also, find the location of the resultant, 7, measured from the bottom of the wall. Over-consolidation ratio, OCR Problem H 4' (deg) 13.1 7.5 m 31 19.2 kN/m³ 2.2 13.2 27 ft 38 121 lb/ft³ 1.9 13.3 11 m 28 179 kN/m³ 1.3 13.4 16 ft 41 118 lb/ft³ 1.0 Sand Unit weight = y (or density = p) H c' = 0 8' (angle of wall friction) = 0 Activate Windows Go to PC settings to activate Windows. Figure 13.39
In retaining walls, what happen when lateral soil pressure exceeds the weight of the wall (its slab + its heel)? Hint: the wall cross section is ideal with toe and shear key. wall overtunes wall slides wall develops excessive bearing oressure
Retaining wall with geotextile reinforcement is 6m high. A granular backfill has a unit weight of 15.9 kN/m3 and effective friction angle of 30°. The allowable tensile force (Tall) in the geotextile fabric is 16 kN/m. Determine the vertical spacing of fabric if the factor of safety against breakout of the geotextile is equal to 1.5? If factor of safety against the pullout is 1.5 what is the in-plane length (L) of the geotextile? Assume that the interface friction angle between the backfill soil and geotextile is equal to 2/3 of the effective friction angle of the backfill. Also compute factors of safety against the overturning and sliding of the mechanically stabilized earth wall for the previously selected dimensions of the wall. Assume that the backfill soil is also located directly below the wall.
A retaining wall is to be constructed shown below. It has the following information: Soil Parameters Retaining Wall Specifications 01 = 30 degrees Y1= 18 kPa W1 0.4 m b;= 1.6 m b2= 1.2 m by= 0.7 m It- 0.3 m 2 = 28 degrees Y2- 17 kPa C2- 0 a- 28 degrees Va 20 kPa Cg- 15 kPa D- 1.6 m H- 4.5 m Yeoncrete 23.58 kN/m 8'- 2/34 H. 14 b, b, Figure 1 Determine 1) Ка 2) Determine the Coulomb active force per unit length of the wall, Pa kN/m 3) Overturning moment (Mo) at the toe kN- m/m 4) Total vertical forces kN/m 5) Resisting moment (Mo) at the toe kN- m/m