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Lateral soil pressure on box SOE

beagleboy

Structural
May 31, 2013
6
hey Engineers!

Looking for some input on the lateral soil pressure on the box SOE system. I'm designing a box SOE. The box is about 18ft square x 25ft deep. Sheet piles are running vertically with walers all along the perimeter with vertical spacing of 6-8ft. On the sheet piles what the lateral soil pressure distribution would look like? Would it be a triangular or any other shape such as trapezoidal? Would the pressure distribution change because walers are experiencing bending as well as axial loads from the soil? Please note the soil pressure on one waler induces the bending in that waler and axial into the walers that it is connected to at both ends. Any thoughts, experiences would be helpful. Thanks.
 
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It sounds like you are designing a "braced cofferdam," so the recommended soil pressure diagram is the Terzaghi trapezoidal distribution.
 

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