GATE CE 2020 Set 1 — Question 56
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Geotechnical Engineering → Earth Pressure → Active Earth Pressure
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Question
A vertical retaining wall of height has to support soil having unit weight of , effective cohesion of , and effective friction angle of . As per Rankine's earth pressure theory and assuming that a tension crack has occurred, the lateral active thrust on the wall per meter length (in kN/m, round off to two decimal places), is ________.
Correct answer
21 to 23
Solution
1.Calculate the coefficient of active earth pressure ():
2.Determine the depth of the tension crack ():
3.Calculate the active earth pressure at the base of the wall ():
4.Calculate the total lateral active thrust () per meter length, assuming the tension crack has occurred (neglecting the negative pressure zone):
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