A 6 m high unyielding retaining wall having a backfill of submerged clay in its over consolidated state with over consolidation ratio of 3. The porosity and specific gravity of the backfill material is 0.35 and 2.6 respectively. The Poisson's ratio of the backfill is 0.23 for normally consolidated state. The earth pressure at the bottom of the retaining wall (Water table is at ground level) is

A 6 m high unyielding retaining wall having a backfill of submerged clay in its over consolidated state with over consolidation ratio of 3. The porosity and specific gravity of the backfill material is 0.35 and 2.6 respectively. The Poisson's ratio of the backfill is 0.23 for normally consolidated state. The earth pressure at the bottom of the retaining wall (Water table is at ground level) is

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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An 8 m tall retaining wall holds cohesionless sand with a density and angle of internal friction of 1.85 Mg/m3 and 33°, respectively. If the surface of the backfill slopes upwards at 86° to the vertical, Use Rankine’s conditions to find the force per unit length of the wall and its location for (a) Active State (b) Passive State Please draw the pressure diagram neatly for both cases
Q-f Calculate the settlement of the bridge pier shown in Fig. Q-f (page 3) due to primary consolidation of the clay. The bridge load imposes an approximate vertical stress increase at the center of the clay layer of 150 kPa. 9 m 1 m 1 m 12 MN Pier: 3 m x 10 m 3 m 5 m Dense sand e = 0.45 E' = 55 MPa v' = 0.35 $' = 36° Normally consolidated clay eo = 0.85 E' = 15 MPa Sand and gravel Cc = 0.3 (su) f = 40 kPa v' = 0.25, vμ = 0.45 c = 30°
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Calculate the settlement of the bridge pier shown in Fig. ?-f (page 3) due to primary consolidation of the clay. The bridge load imposes an approximate vertical stress increase at the center of the clay layer of 150 kPa.
2. At what depth would total the vertical stress in a deep deposit of clay (e = 1.1, G;= 2.74) be 100 kPa if the water table is 1 m below the ground surface and the above the water surface a saturation degree of 90 % exists. What is the effective stress at the same depth? 3. A soil layer consists of 4 meters of sand underlying 5 meters of clay. The water table is nat- urally located at the rock bed under the soil strata but rose by 6 meters due to a recent storm. Further, capillary action is expected to develop due to the nature of the soil in ques- tion. Compute the effective stresses at the end of expected capillary action, at the end of the water table, at the interface of the clay and sand and finally at the bottom of the soil strata. Pertinent soil properties are as follows: Average S, Capil- G, D10 lary Zone Clay 2.71 0.98 0.0125 25 55% Figu Sand 2.74 0.93 N.A. N.A. N.A.
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The sand layer shown is subjected to a downward flow of water. (52.58, 0.436, 14.36) In flow 0.70 in 0.80m 1.2 Sand e=0.52 Gs = 2,70 1.0 valve open Out flow Determine the total stress at point B. b. Determine hi. Determine the pore water pressure at point A. а. C.