基坑支护的混凝土芯搅拌桩有限元分析

Finite-element analysis of concrete-cored deep cement mixing piles in deep excavation engineering

介绍了一种新型的基坑支护形式,即混凝土芯水泥土搅拌桩,它是一种融合了复合地基和桩基础优点的地基处理方法,是一种结合围护挡土结构和防渗止水帷幕功能于一体的支扩结构。笔者还采用有限元方法分析了基坑支护中的混凝土芯水泥土搅拌桩的位移大小分布和方向分布、应力大小分布和方向分布、塑性区的分布和临空面的水平位移。分析结果表明,采用门型结构的混凝土芯水泥土搅拌桩进行支护,既安全可靠,又经济可行。

A new strutting system, named concrete-cored deep cement mixing (DCM) pile used in deep excavation engineering is introduced. It is proved that concrete-cored DCM pile has many advantages such as simple construction, little environmental disturbance, high bearing capacity, small settlement, low costs, and extensive adaptability in deep excavation engineering. Finite-element analysis is performed on concrete-cored deep cement mixing (DCM) piles of this new strutting system, and gives the displacement distribution, stress distribution, plastic area and horizontal displacement. This research is also valuable as a reference to the design of other kinds of composite piles.