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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A retaining wall of height 10 m with clay backfill is shown in the figure (not to scale). Weight of the retaining wall is 5000 kN per m acting at 3.3 m from the toe of the retaining wall. The interface friction ER angle between base of the retaining wall and the base soil is 20. The depth of clay in front of the retaining wall is 2.0 m. The properties of the clay backfill and the clay placed in front of the retaining wall are the same. Assume that the tension crack is filled with water. Use Rankine's earth pressure theory. Take unit weight of water, Y = 9.81 kN/m³ Yw
The backfill behind a retaining wall, located above the water table, consists of a sand of unit weight 19 kN/m³. The height of the wall is 8 m and the surface of the backfill is horizontal. Determine the total active thrust on the wall according to the Rankine theory if c'=0 and q'=38. If the wall is prevented from yielding, what is the approximate value of the thrust on the wall?
Q.5 A retaining wall has a vertical back and is 7.32 m high. The soil is sandy loam of unit weight 17.3kN/m3. It has a cohesion of 12 kN/m2 and Ø = 20°. Neglecting wall friction, determine the active thrust on the wall. The upper surface of the fill is horizontal.
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 single rectangular opening 10 ft (3.0 m) in height is driven in rock having strengths of fc = 18,000 lb/in2 (124 MPa) and ft=1500 lb/in2. (10.3 MPa).Rock specific gravity is 2.3.The opening is located at depth of 2000 ft (610 m) in a stress field of no lateral pressure and has a fillet ratio of h .a. Determine if the opening will fail when its width is 20 ft (6.1 m).b. Is there any benefit to reducing the width to 10 ft (3.0 m)? To 5 ft (1.5 m)?c. What is the maximum safe width of opening?
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.
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

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