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《Journal of Zhejiang University(Engineering Science)》 2007-01
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Settlement of composite ground reinforced by deformable piles

ZHANG Yi-ping,XU Dong(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310027,China)  
An advanced unit cell model was put forward to evaluate the settlement of deformable pile under flexible foundation.Based on the assumed vertical displacement of the unit cell and the assumed distribution on the pile-soil interface of the pure friction pile,and using the boundary conditions that there was no relative slipping between pile and soil,the pile decrement was equal to that of soil on the pile-soil interface and that the vertical sheer stress of the unit cell's outer edge was equal to zero,the formula for the frictional distribution of the pure friction pile and the formulas for the displacement of pile and soil in the treated area were deduced.As the load increases,when the pile is no longer the pure friction pile,the method is also applicable for the cases that the pile has end support or the friction acting on the pile reaches limit.After computing and comparison,the result of the theory is close to the real value.
【Fund】: 国家自然科学基金资助项目(50278089)
【CateGory Index】: TU433
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