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《Sichuan Building Science》 2013-02
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Numerical analysis of the long pile on the composite foundation

ZHAI Xiaoli1,GE Xinsheng2(1.Shanxi Conservancy Technical College,Taiyuan 030027,China; 2.College of Architecture and Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,China)  
This paper uses the finite element analysis software ANSYS to build the long-short-pile composite foundation model.The research in this paper discusses the settlement of pile and stress characteristic influence of the corner pile,side pile and center pile about the modulus and the length of long pile variation of long-short-pile composite foundation,and provide a theoretical evidence for a suitable selection of the modulus and the length of long pile and an optimal design for the composite foundations.The analysis results show that:The stress of long pile has an important feature along the changes of the depth.It is that the point of maximum stress is not on the top of long pile,but in a certain depth under it,the stress of pile gradually increased along the depth upon this depth while decrease below it.The maximum stress points are on the top of short pile,and the stress decreases along the depth from the pile top.As the modulus and the length of long pile increases,the settlement of long pile and short pile decrease,but the rate of decrease is getting smaller and smaller.The stress of the long pile gets greater and greater,the change rule of the stress of short pile is irregular.
【Fund】: 国家自然科学基金资助项目(50678110)
【CateGory Index】: TU473.1
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