复杂多因素影响下基坑开挖周边土体位移特性

The Characteristics of the Surrounding Soil Displacement in Foundation Pit Excavation under Multi Complex Factors

分析复杂多因素影响下基坑开挖周边土体位移特性,建立弹塑性有限元模型对地连墙刚度、地连墙插入比、土体流变的时效特性、基坑开挖方式4个因素进行模拟。通过计算,研究了地连墙刚度、地连墙插入比、基坑开挖方式和基坑周边土体水平位移的关系以及基坑开挖后周边土体的位移随时间的推移而增大的土体流变特性。

To analyze the characteristics of the soil displacement around the foundation pit under multi-complex factors,an elastic-plastic FEM is established,and four factors are simulated including the diaphragm wall stiffness,the wall insertion ratio,excavation methods and soil creep aging characteristics.According to the results of the calculation,the relationship between the first three factors and the horizontal displacement of soil around the foundation pit is researched.Afterward the rheological characteristics of surrounding soil after the excavation of foundation pit are studied.