Principles of Foundation Engineering (MindTap Course List)
8th Edition
ISBN: 9781305081550
Author: Braja M. Das
Publisher: Cengage Learning
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In Figure 12.24, which shows a vertical retaining wall with a granular backfill, let H = 4 m, α = 17.5º, γ = 16.5 kN/m3, Φ' = 35º, and ẟ' = 10º. Based on Caquot and Kerisel’s solution, what would be the passive force per meter length of the wall?
(Solve the following exercise, showing and explaining step by step to its resolution). An 8.50 m high retaining wall is built to support a sandy silt with a volumetric weight of 1850 kg/m3 and an angle of internal friction of 28°. The silt also has a cohesion of 1300 kg/m2. The ground surface is horizontal. The effect of the friction of the wall is neglected. Determine the pressure at the base of the screen.
A retaining wall 6m high retains sand with φ = 30° and unit weight24kN/m3 upto the depth of 3 m from top. From 3 m to 6 m the material is cohesive soil with c = 20kN/m2 and φ = 20°. Unit weight of cohesivesoil is 18 kN/m3 A uniform surcharge of 100 kN/m2 acts on top of thesoil determine the total lateral pressure acting on the wall and its pointsof application.
Chapter 13 Solutions
Principles of Foundation Engineering (MindTap Course List)
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- (i). Calculate lateral earth pressure for the basement structure. Use the following data, depth of wall 8m, cohesion = 0, angle of friction = 25°, soil type = clay, OCR=2.0, bulk unit weight = 19 kN/m3. (ii)What will change if we would have coarse sand behind the retaining wall instead of clay? Assume compacted coarse sand behind retaining wall and get the recommended values of Cohesion and friction for sand from literature and calculate lateral earth pressure for wall with dimensions given in section (i) and compare both results.arrow_forwardA 6m vertical retaining wall is supporting a cohesion less horizontal back fill having a unit weight of 16kN/m3 and an angle off riction of 32 degrees. It carries a uniforms urcharge of15kN/m3. a)Determine the at rest lateral force per unit length of wall. b) Determine the Rankines active force per unit length of wall. c)Determine the Rankines passive force per unit length of wall.arrow_forwardGiven the height of the retaining wall, H is 6.4 m; the backfill is a saturated clay with f 5 08, c 5 30.2 kN/m2 , gsat 5 17.76 kN/m3 , a. Determine the Rankine active pressure distribution diagram behind the wall. b. Determine the depth of the tensile crack, zc. c. Estimate the Rankine active force per foot length of the wall before and after the occurrence of the tensile crack.arrow_forward
- The cantilever retaining wall, whose cross section is shown below, retains a sandy backfill with soils properties as given in the figure.5.1. Evaluate the stability of the wall against overturning and sliding. Assume that thepassive earth pressure is fully mobilized in front of the wall, i.e. use include passive pressure in your calculations. 5.2. Draw the pressure distribution beneath the retaining wall indicating the numerical values of the maximum and minimum pressures. Given density of concrete = 24kN/m3 revision paper 2020arrow_forwardA 4m high vertical wall supports, a saturated cohesive soil (du= 0) with horizontal surface. The top 2.5 m of the backfill has bulk density 17.6 kN/m³ and apparent cohesion of 15 kN/m². The bulk density and apparent cohesion of the bottom 1.5 m is 19.2 kN/m² and 20 kN/m² respectively. If tension cracks develop, what would be the total active pressure on the wall?Also draw the pressure distribution diagram.arrow_forwardA retaining wall 6 m high is supporting a horizontal backfill of soil having a void ratio of 0.5 and specific gravity of 2.7. The angle of internal friction is 32°.Compute the rankine active force on the wall if there is no water.Compute the rankine active force on the wall if the water table is on top of the horizontal backfill level.Compute the rankine active force on the wall if the water table is at the bottom of the wall and the water content is 10%.arrow_forward
- A 4m high vertical wall supports a saturated cohesive soil φ = 0 withhorizontal surface. The top 2.5m of the backfill has bulk density of 17.6kN/m3 and apparent cohesion of 15 kN/m2 The bulk density and apparent cohesion of the bottom 1.5 m is 19.2 kN/m3 and 20 kN/m2 respectively. If tension cracks develop, what would be the total active pressure on the wall? Also draw the pressure distribution diagramarrow_forwardA 8-meter-high retaining wall, with a perpendicular back, retains the soil with a unit weight of 17.17 kN/m3. The cohesion and the internal friction angle of the backfill were measured as 13 kPa and 20°, respectively. Assume that there is no friction on the wall and the surface of the backfill is horizontal. Calculate the expected active force on the wall and the position of this force.arrow_forward
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