Effects of River Water Level on the Deformation and Stress of Deep and Shallow Subway Foundation Pit
The paper aims to study the influence of river water level on deep and shallow subway foundation pit engineering.The fluid-solid coupling calculation model in RS3 finite element software was used to study the influence of river water level change on the deformation and stress of deep and shallow subway foundation pit.The results show that the horizontal displacement and bending moment of the diaphragm wall,uplift displacement of pit bottom and vertical displacement of the lattice column all increase with the increase of river water level.The ground surface settlement displacement and the stability safety factor of foundation pit decrease with the increase of river water level.The variation of river water level has little effect on vertical displacement of lattice columns.When the elevation of river water level is in the range of 21～22 m,it has great influence on the horizontal displacement and bending moment of the diaphragm wall,ground surface settlement displacement,the uplift displacement of pit bottom and the stability safety factor of foundation pit.With the increase of river water level,the influence range of ground surface settlement displacement and uplift displacement of pit bottom expand to the soil at the bottom of the pit and the river side,and the plastic failure area at the shallow part of the foundation pit and the bottom of the retaining pile will also increase.
riverside conditionsdeep and shallow subway foundation pitstage of riverfinite element analysisfluid-solid coupling
NETL
NSTL
万方数据
