In the Zhapu Road,Tiantong Road foundation excavation group project in Shanghai soft soil area,a three-dimensional finite element method considering the interaction between soil and structure is proposed by using a small strain constitutive model,the complex construction process of foundation excavation group is simulated,field measurement results verify the rationality of finite element analysis.On this basis,the spatial effect of ground settlement caused by excavation,the gradual development process of ground settlement along with excavation of each foundation excavation area.The results show that,the spatial effect of ground settlement caused by foundation excavation is significant,the surface deformation behavior around the foundation excavation group is obviously different from the surface settlement law for soft soil single excavation,under the influence of superposition and interaction of each excavation area.During the excavation of foundation excavation group,due to the different soil widths between different foundation excavation zones,the surface settlement curve presents a complex deformation pattern,such as symmetrical W-shape,asymmetric W-shape,U-shape,groove type and relatively flat groove type.
关键词
基坑群/地表沉降/叠加影响/有限元模型
Key words
foundation excavation group/settlement/superimposed effects/finite element model
维普
万方数据