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A vertical-sided trench was being cut in a very soft clay soil with a density of...

A vertical-sided trench was being cut in a very soft clay soil with a density of about 110 pcf. A depth of 8 ft had been reached when the sides of the trench caved in. Could the trench be completed to a depth of 10 ft by sloping the sides before installing bracing? If so, how steeply may the sides be cut? Show your calculations and sketch the procedure you would follow to complete the job. Apply both the design criteria and the OSHA requirements to this problem.

ANSWER is: Trench will need to be structurally supported. SHOW WORK

Engineering   Civil-Engineering   
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