A frictionless retaining wall is 7 m high and supports a horizontal backfill with the following properties: dry unitweight = 14.6 kN/m, saturated unit weight = 19.21 kN/m, angle of friction - 34°.%3D• If the ground water table is very deep, what is the expected total active thrust in the wall if it is 1.5 mwide? (Select )• If the ground water table is 3,5 m deep and the soil above the water table is dry, what is the magnitude ofthe active force in kN per 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 thetotal active force from the top of the wall? (Select)

Water table also cause Active earth pressure on the retaining wall . Area of the pressure diagram…

Answered: A frictionless retaining wall is 7 m…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Q2. Which of the two retaining walls in Figure 2 produces a larger horizontal component of active thrust? y = 18 kN/m³ $'= 34° c' = 0 kPa 14 H=7m H = 7m Figure 2 115°
A smooth vertical wall of height 6 m retains a granular backfill with unit weight of 22 kN/m³ and a friction angle of 36°. Compute the value and location of the resultant active thrust.
A smooth vertical wall 4 m retains cohesive soil backfill with c = 10 kN/m?. O = 0 and y = 18 kN/m2. Determine (i) The depth at which active earth pressure is zero. (ii) Depth of tension crack (iii) Depth at which total active thrust is zero (iv) Plot of active pressure distribution (v) Total active thrust per unit length of wall when tension cracks not developed.
A retaining wall with a smooth vertical back retains sand backfill for a depth of 6m. The horizontal backfill has the following properties. d' = 0, y = 16KN/m³; Vsat = 20k N/m³. Calculate the magnitude of total thrust against the wall for given conditions: (a) backfill fully drained but the top of wall is restrained against yielding: (b) backfill fully drained and the wall is free to yield, and (c) wall free to yield, water table at 3m depth without drainage. Determine the point of application for the resultant thrust case(c).
The following figure shows a section of an anchored retaining wall embedded into a saturated stiff clay layer. The sand has a unit weight of = 18 kN/m³, c' = 0 kPa and o' = 34º. The clay has a unit weight of = 20 kN/m³, c₁ = 80 kPa and = 0°. A uniform pressure of 40 kPa is applied on the soil surface. The short term stability of the wall is considered in an undrained analysis. Use the Rankin's theory of lateral earth pressure to determine the active and passive horizontal stresses. You should apply the requirements of AS 4678 and the partial factors of safety method in estimation of soil pressures. Assume the soil is in-situ and use a structural classification factor of ₁ = 1. 3m 1m Water table 1.5m 40 kPa Not to Scale Sand Clay Ta
A retaining wall supports a horizontal backfill that is composed of two types of soil. First layer: 4.84 meters high, Unit weight of 17.36 kN/m3, coefficient of active pressure of 0.285 Second layer: 5.68 meters high, Unit weight of 18.9 kN/m3, coefficient of active pressure of 0.307 Determine the distance of the total active force measured from the bottom of the wall. Round off t
(4) The backfill behind a retaining wall is clay with a unit weight of 18 kN/m', cohesion of 15 kPa, and an internal friction angle of 30°. The height of the wall is 6 m. The back of the wall is vertical and smooth, and the surface of the backfill is horizontal. Please calculate the active earth pressure on the wall back, including its distribution, the resultant force and its position.

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