Deformation Analysis of Dewatering Excavation of Deep Foundation Pit in Soft Soil
[Purposes]This paper aims to study the impact of dewatering and excavation on the support structure and surrounding environment of soft soil deep foundation pits.[Methods]Based on a subway deep foundation pit project in Shenzhen,a three-dimensional foundation pit model was established using ABAQUS finite element software to analyze the impact of dewatering and excavation on the settlement and deformation of the support structure,adjacent surface and buildings.At the same time,monitoring data and simulation results were compared and analyzed.[Findings]The results show that the horizontal deformation of the slurry wall is parabolic,the horizontal displacement in the middle of the foundation pit is large,and the bottom displacement is small;the settlement displacement near the surface shows a trend of first increasing and then decreasing,and the settlement deformation of both the surface and buildings is within the control range;After the excavation of the foundation pit,the axial force of the middle support is the highest,and the deformation results of the excavation are consistent with the actual monitoring values.[Conclusions]By analyzing the deformation law of foundation pits,reference is pro-vided for future research on dewatering and excavation of soft soil deep foundation pits.
deep foundation pit engineeringfluid-structure interactiondeformation of support structuresurface subsidence
NETL
NSTL
万方数据
维普
