Analysis of Foundation Pit Deformation in Soft Soil Area Considering SMW Pile Steel Layout
In view of the deformation and stress characteristics of the retaining structure of long and deep foundation pit with SMW(soil mixing wall)pile,the three-dimensional modeling of a soft soil foundation pit in Hangzhou is carried out by finite element method.The variation law of displacement,surrounding surface settlement and deep soil displace-ment is explored,and the influence of SMW pile steel layout,soft soil layer distribution and soil performance on foun-dation pit deformation is explored.Comparing and analyzing the numerical simulation results,it can be seen that the denser the steel spacing is,the smaller the lateral horizontal displacement,surface settlement and deep soil displace-ment of SMW pile are.The maximum displacement of the enclosure structure of the close-inserted layout method is re-duced by 8.16%-9.74%compared with the maximum displacement of the enclosure structure of the insert-hop-one-type layout method,and the maximum settlement of the surrounding surface is reduced by about 10.00%-23.53%.The thickness of soft soil layer has a great influence on the deformation of foundation pit.The thicker the soft soil layer is,the larger the deformation value of foundation pit retaining structure and the surface settlement value are.After the thick-ness of soft soil layer increases,the lateral displacement of retaining structure increases by 14.55%-42.22%,and the surface settlement increases by 2-7 times.Through the above research and analysis results,it can provide reference ex-perience for similar foundation pit enclosure design using SMW pile.
soft soil excavationenclosure structure deformationSMW construction method pilefinite element sim-ulation
万方数据
维普
