5 The backfill retained by a gravity retaining wall shown in Figure P16.5 consists of two sand layers, compacted at dif- ferent densities. The properties of the sand are shown in the figure. Assuming that the gravity wall does not move later- ally (i.e., at-rest), determine the magnitude and location of the thrust on the wall. 2 m 3 m Sand 1 y = 17.5 kN/m³; ' = 32° Sand 2 y = 17.5 kN/m³; ' = 36°

5 The backfill retained by a gravity retaining wall shown in Figure P16.5 consists of two sand layers, compacted at dif- ferent densities. The properties of the sand are shown in the figure. Assuming that the gravity wall does not move later- ally (i.e., at-rest), determine the magnitude and location of the thrust on the wall. 2 m 3 m Sand 1 y = 17.5 kN/m³; ' = 32° Sand 2 y = 17.5 kN/m³; ' = 36°

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter16: Lateral Earth Pressure

Section: Chapter Questions

Problem 16.5P

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45.) A retaining wall supports a horizontal backfill that is composed of two types of soil. First layer: 5.91 meters high, Unit weight of 17.26 kN/m3, coefficient of active pressure of 0.291 Second layer: 5.36 meters high, Unit weight of 18.85 kN/m3, coefficient of active pressure of 0.301 Determine the distance of the total active force measured from the bottom of the wall. Round off to three decimal places.
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 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.
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For the frictionless wall shown in Figure No 1, Calculate the following: (a) The active lateral earth pressure distribution with depth.  (b) The passive lateral earth pressure distribution with depth(c) The magnitudes and locations of the active and passive forces.  (d) The resultant force and its location.  (e) The ratio of passive moment to active moment. Note: UDL should be considered as mentioned in the figure
A retaining wall 6 m high supports cohesionless soil having a dry density of 1600 kg/m³, angle of resistance 32 and void ratio of 0.68. 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. a. 73.1 b. 86.7 c. 62.4 d. 98.1 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. a. 112 b. 171 c. 147 d. 153 3. Find at what height above the base of the wall the thrust acts during the waterlogged condition. a. 2.21 m b. 2.00 m c. 1.74 m d. 1.42 m
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.
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