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3 A wide embankment 5m high is built on the ground described in the previous example....

3

A wide embankment 5m high is built on the ground described in the previous example. The material of this bank has a moisture content of 13% and a dry density of 1860kgm-3. Find the vertical effective stress in the clay at a depth of 7.33m below the original ground level.

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  1. A piezometer tip is set at 10m above datum into the top of a confined layer of sand. The water level in the piezometer is 40m above datum; what is the pressure of water above the sand?
  2. Clay overlies the sand and has a unit weight of 20kN/m3. How close to the top of the sand may an excavation be safely extended downwards into the clay? List the assumptions you have made to calculate this distance.
Engineering   Civil-Engineering   
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