【摘要】 以往的基坑设计中水泥搅拌桩多作为止水帷幕,而不考虑其荷载分担作用,但是,一些试验和实测资料表明,水泥搅拌桩还可以分担部分土压力,与支护结构形成复合式围护结构。本文采用非线性有限元软件建立考虑止水帷幕的基坑平面模型,分析水泥搅拌桩的排数、插入比和位置对支护结构的变形和土压力分布的影响,并且发现不同基坑深度下止水帷幕对支护结构变形影响程度是不同的,相关结果可为以后基坑的优化设计提供参考。更多还原

【Abstract】 The cement mixing pile is used as waterproof curtain in the previous design of foundation pit,regardless of its role in load sharing.However,some tests and measured data indicated that the composite retaining structure formed by cement mixing pile and retaining pile can also share part of the earth pressure.In the thesis,the plane strain model of the foundation pit considering the waterproof curtain was made based on the nonlinear finite element software the waterproof curtain.The following factors that affect the deformation and the earth pressure of supporting structure were considered:the rows,the insertion ratio and the position of the cement mixing pile.The degree of effect on the deformation of supporting structure for the cement mixing pile is different for different depth of foundation pit.Based on the conclusions,this thesis provided the reference for the optimization design of the foundation pit.更多还原