砂土地层中地下连续墙的抗震性能研究OA

To study the response law of underground diaphragm wall of pipeline groove foundation pit project in Changqing District of Wuhan city under seismic conditions,the rapid simulation method of foundation pit earthquake response is established by using FLAC2D software.The response analysis of diaphragm wall structure of foundation pit under different seismic wave applying positions and stratum type is carried out.The results show that the closer the seismic wave is to the diaphragm wall,the greater the bending moment and shear force of the wall,the greater the destructive effect on the wall.In the dense sand,the bending moment of the wall are obviously smaller than those in the loose sand.However,the shear force is larger than that in the loose sand.In addition,under seismic load,the bending moment and shear force of diaphragm wall are 2.8 and 2.7 times of the static analysis,respectively.The axial force of bracing support will increase under the action of earthquake,which is very likely to be destroyed.Therefore,it is suggested that in the high seismic intensity area,the foundation pit design should fully consider the seismic damage.