This paper takes a deep foundation pit project in soft soil area as the research object,and uses finite element software to model and analyze two different kinds of support structures of the foundation pit.In order to study the support effect of different support structures in the foundation pit project,the deformation of the two kinds of support piles and the settlement of the foundation pit soil during the excavation process are analyzed,and the simulated horizontal displacement of the pile body and the surface settlement are compared with the measured data.The research shows that with the excavation of the foundation pit,the horizontal displacement of the pile body and the surface settlement show a gradually increasing trend;the horizontal displacement of the pile body can be effectively controlled by adding steel pipe inner bearing,the simulation results of the inner-supported row pile structure have a similar change trend with the field measured results,which verifies the feasibility of the finite element simulation method;compared with the double-row pile support structure,the inner-supported row pile support structure has smaller deformation and pile bending moment,which meets the requirements of the design specification.
soft soil areafoundation pit projectrow pile supportfinite element analysispile bending moment
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