A frictionless retaining wall is 7 m high and supports a horizontal backfill with the following properties: dry unit weight = 14.6 kN/m3,saturated unit weight = 19.21 kN/m, angle of friction = 34°.• If the ground water table is very deep, what is the expected total active thrust in the wall if it is 1.5 m wide?[ Select ]• If the ground water table is 3.5 m deep and the soil above the water table is dry, what is the magnitude of the active force in kNper meter of the wall? ( Select]• If the ground water table is 3.5 m deep and the soil above the water table is dry, what is the distance of the total active force fromthe top of the wall? [Select ]

Two strengths do the retaining wall have to withstand. The retaining walls will be prevented from…

Answered: A frictionless retaining wall is 7 m…

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 13.21P

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Q.9 A smooth retaining wall is 4 m high and supports a cohesive backfill with a unit weight of 17 kN/m3. The shear strength parameters of the soil are cohesion =10 kPa and Ø = 10°. Calculate the total active thrust acting against the wall and the depth to the point of zero lateral pressure
A retaining wall 7 m high, with its back face smooth and vertical. It retains sand with its surface horizontal. Using Rankine’s theory, determine the active earth pressure at the base when the backfill is submerged with water table at the surface. Take γ=18 kN/m^3 ,ϕ=30°, γ_sat=21 kN/m^3.
A retaining wall 7 m high, with its back face smooth and vertical. It retains sand with its surface horizontal. Using Rankine’s theory, determine the active earth pressure at the base when the backfill is saturated. Take γ=18 kN/m^3 ,ϕ=30°, γ_sat=21 kN/m^3.
A retaining wall 7 m high, with its back face smooth and vertical. It retains sand with its surface horizontal. Using Rankine’s theory, determine the active earth pressure at the base when the backfill is dry. Take γ=18 kN/m^3 ,ϕ=30°, γ_sat=21 kN/m^3.
Determine the total active thrust, in kN/m, for a retaining wall (height 5.12 m.) with horizontal backfill given the following properties: Unit weight = 17.79 kN/m3, Angle of internal friction = 30°, Cohesion = 11.71 kPa, and Surcharge = 9.33 kPa.
A retaining wall 8 m high supports cohesionless soil having a dry density of 1600 kg/m³, angle of resistance 33° and void ratio of 0.60. The surface of the soil is horizontal and level with the top of the wall. Neglecting wall friction and using Rankine’s formula for active pressure of a cohesionless soil. 1.Determine the nearest value of the total earth thrust on the wall in KN per lineal meter if the soil is dry. 2. Find the nearest value of the thrust on the wall in KN per lineal meter if owing to inadequate drainage, it is waterlogged to a level of 3.5 m below the surface? 3. Find at what height above the base of the wall the thrust acts during the waterlogged condition?
A retaining wall supports a horizontal backfill that is composed of two types of soil. First layer: 4.27 meters high, Unit weight of 17.25 kN/m3, coefficient of active pressure of 0.286 Second layer: 6.27 meters high, Unit weight of 18.27 kN/m3, coefficient of active pressure of 0.309 Determine the distance of the total active force measured from the bottom of the wall. Round off to three decimal places.
a retaining wall supports a horizontal backfill that is composed of two types of soil. first layer: 4.92 meters high, Unit weight of 16.29 kN/m^3, coefficient of active pressure of 0.296 second: 6.85 meters high, Unit weight of 18.31 kN/m^3, coefficient of active pressure of 0.302 determine the distance of the total active force measured from the bottom of the wall
A retaining wall 7 m high supports a cohesionless soil having a dry density of 1600 kg/m3, the angle of shearing resistance is 33° and void ratio of 0.68. The surface of the soil is horizontal and level with the top of the wall. Neglect wall friction and use Rankine’s formula for active pressure of a cohesionless soil. Determine the nearest value of the total earth thrust on the wall in kN per lineal meter if the soil is dry. Determine the nearest value to the thrust on the wall in kN per lineal meter if owing to inadequate drainage, it is water logged to a level 3 m below the surface. Determine the nearest value to the height above the base of the wall where the thrust acts during the waterlogged condition.
Determine the total active thrust, in kN/m, for a retaining wall (height 5.60 m) with horizontal backfill given the following properties: Unit weight = 17.42 kN/m3, angle of internal friction = 32 degrees, Cohesion = 11.76 kPa, Surcharge = 9.32 kPa.
A retaining wall supports a horizontal backfill that is composed of two types of soil. The first layer is 5.71 meters high. It has a unit weight of 16.03 kN/m3. The second layer is 6.21 meters and has a unit weight of 18.46 kN/m3. If the angle of friction for both layers is 37°, determine the total active force (kN) acting on the retaining wall per unit width.
A 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.

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