水泥土复合式支挡结构是一种在水泥土搅拌桩墙体中插入钻孔灌注桩并架设内支撑的新型支挡形式.本文在分析其支挡特点及有限元程序设计的基础上,通过方案设计与其它支挡形式进行了比较,并将之应用到了实际工程中去;理论和实践证明,水泥土复合式支挡结构在控制墙体位移、坑底隆起、周围地面沉降及内支撑拆除后这些指标的变化等方面有其明显的优越性,其造价适中,建议在软土地区基坑工程中进一步推广. Cement-soil composite retaining structure is a new type of retaining structure that inserts cast-in-place piles and erects internal supports in the cement-soil mixing pile wall. This paper is based on the analysis of its retaining characteristics and FEM program design. The design of the plan was compared with other types of support and applied to the actual project; the theory and practice proved that the cement-soil composite support structure controls the displacement of the wall, the swell of the bottom of the pit, the settlement of the surrounding ground, and the removal of the internal support. After the changes in these indicators have their obvious advantages, its cost is moderate, it is recommended to further promote the soft pit in the pit project.