Foundation Pit Deformation Monitoring and Stability Analysis
In order to study the influence of zonal excavation on the deformation and stress behavior of subway foundation pit,taking the deep foundation pit of a subway station as an example,the displacement of deep horizontal wall,the axial force of support and the surface deformation are monitored.The theoretical and experimental results show that zonal excavation can reduce the length-diameter ratio of a single foundation pit,and then fully mobilize the spatial effect of excavation,which can effectively control the lateral wall deformation.Higher support stiffness can strengthen the integrity of the foundation pit and provide greater lateral force to prevent excessive axial force fluctuation in the deep foundation pit.In the design and construction,it is necessary to pay attention to the difference in the distribution of buildings on both sides of the long and narrow pits,because this will lead to different deformation of the walls on both sides.
foundation pitdeformationzoning excavationmonitoring
NETL
NSTL
万方数据
