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14. The soil profile consists of a 10 m layer of sand underlain by a 20 m layer of clay. The location of water table is 4 m from the ground surface. The unit weight of sand above the water table is 19.05 kN/m3 and below the saturated unit weight of sand is 20.11 kN/m3. The clay has a saturated unit weight of 18.73 kN/m3. a. Find the total stress at the bottom of clay. b. Compute the effective stress at the bottom of the clay. c. If the effective pressure at the bottom of sand is 81.9 kPa, what height above this point the water will rise in the piezometer.

14. The soil profile consists of a 10 m layer of sand underlain by a 20 m layer of clay. The location of water table is 4 m from the ground surface. The unit weight of sand above the water table is 19.05 kN/m3 and below the saturated unit weight of sand is 20.11 kN/m3. The clay has a saturated unit weight of 18.73 kN/m3. a. Find the total stress at the bottom of clay. b. Compute the effective stress at the bottom of the clay. c. If the effective pressure at the bottom of sand is 81.9 kPa, what height above this point the water will rise in the piezometer.

Structural Analysis
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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14. The soil profile consists of a 10 m layer of sand underlain by a 20 m layer of clay. The location of water table is 4 m from the ground surface. The unit weight of sand above the water table is 19.05 kN/m3 and below the saturated unit weight of sand is 20.11 kN/m3. The clay has a saturated unit weight of 18.73 kN/m3. a. Find the total stress at the bottom of clay. b. Compute the effective stress at the bottom of the clay. c. If the effective pressure at the bottom of sand is 81.9 kPa, what height above this point the water will rise in the piezometer.
Transcribed Image Text:14. The soil profile consists of a 10 m layer of sand underlain by a 20 m layer of clay. The location of water table is 4 m from the ground surface. The unit weight of sand above the water table is 19.05 kN/m3 and below the saturated unit weight of sand is 20.11 kN/m3. The clay has a saturated unit weight of 18.73 kN/m3. a. Find the total stress at the bottom of clay. b. Compute the effective stress at the bottom of the clay. c. If the effective pressure at the bottom of sand is 81.9 kPa, what height above this point the water will rise in the piezometer.
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