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Question 5.6: If the water level in Ex. 5.5 remains unchanged and an excav...

If the water level in Ex. 5.5 remains unchanged and an excavation is made by dredging, what depth of clay must be removed to reduce the effective pressure at point A at a depth of 37 ft by 1000 lb / ft ^{2}? (Fig. Ex. 5.5)

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