水泥搅拌桩复合地基研究

A Study of Cement Clay Mixed Pile Composite Fondation

针对南河闸水泥搅拌桩复合地基的物理力学模型，采用有限元数值计算方法，对复合地基结构设计中的关键问题———最优置换率和综合模量进行了研究，并对南河闸复合地基结构进行了非线性应力分析，得到了以复合地基的承载力和地基加固处理的工程投资为目标的最优置换率．研究结果表明，复合地基的综合模量随置换率的变化并非呈线性关系．

In connection with the cement clay mixed pile composite foundation of the Nanhe lock project,this paper discusses the optimal replacement ratio and the synthetic modulus—key problemes in the design of such composite foundation.FEM is used in the numerical analysis.The optimal replacement ratio subject to better loading capacity and less cost is obtained.It is shown that the ralationship between the synthetic modulus and replacement ratio is nonlinear.