黏性土复合地基挡墙侧压力研究

因技术进步和经济效益良好,现有大量工程项目采用复合地基。复合地基因其桩土共同作用,能有效减小地基变形和侧移。基于砂土复合地基侧向开挖离心试验和有限元分析模型获得的砂性土复合地基侧压力研究结果,建立黏性土ABAQUS有限元分析模型,分析附加荷载、黏聚力、内摩擦角和挡墙刚度对黏性土复合地基挡墙侧压力的影响,得出其侧压力沿深度分布规律,并与砂性土复合地基挡墙侧压力相比较。研究助于支护结构有效设计,控制复合地基及上部结构变形,降低工程造价。

Lateral pressures on retaining wall of composite foundation in clayey soils

Due to the technological progress and good economic benefits, a large number of existing projects have adopted composite foundation. Because of the combined effects of piles and soils, the composite foundation can effectively reduce the deformation and lateral displacement of foundation. Based on the studies on the side pressures of composite foundation in sandy soil obtained by the centrifugal tests and finite element analysis models for sandy composite foundation, the ABAQUS finite element analysis models for composite foundation in clayey soils are established to analyze the influences of the additional loads, cohesive forces, internal friction angles and stiffnesses of retaining wall on the lateral pressures on the retaining wall, and the distribution of the lateral pressures along depth is obtained. The research is helpful to the effective design of supporting structures, to control the deformation of composite foundation and superstructure, and to save the cost of engineering projects.