水泥土桩基坑支护与止水围护机理研究

Study on retaining and sealing system with deep-mixing pile

针对城市基坑建设的特点,结合环境岩土工程学研究,提出用水泥土桩加固体进行基坑支护和止水围护的方案。利用平面应变弹塑性有限元数值分析方法,对这种支护和止水围护作用机理进行了多方面研究。结果显示水泥土桩支护和止水作用明显,能满足基坑支护和止水的设计要求,同时可以控制临近地基和市政设施的沉降。

Based on two-dimensional FEM the deformation of retaining system with deep-mixing pile and drainage of foundation pit project during excavation is analyzed. Step-excavation is simulated with the finite element program PLAXIS. The results provide advice for foundation pit design and assess of environmental effect.