Optimum Design And Stability Analysis Of Pile-Anchor Retaining Structure In Deep Foundation Pit Based On BIM Technology

Deep foundation pit engineering is a comprehensive and strong geotechnical engineering problem.In the process of excavation and support,it is necessary to ensure the normal safety of the foundation pit and prevent the displacement of the supporting structure and the pit Foundation buildings around the pit,roads,municipal pipelines,etc.are not destroyed.The design optimization of deep foundation pit engineering support scheme is an important means to ensure the smooth excavation of foundation pit construction.At the same time,with the continuous development of computer technology in China,BIM technology and numerical simulation technology has been applied to deep foundation pit engineering,and played an important role in solving many engineering problems.Based on the deep foundation pit engineering of He Long Urban Life Plaza in Changsha,this paper uses BIM software Revit,Navisworks and deep foundation pit design analysis software to optimize and verify the initial design of the deep foundation pit.Finally,Plaxis finite element software was used to simulate the optimized support system.The main tasks include:(1)Modeling the foundation pit support system with BIM modeling software Revit,then colliding the support model with Navisworks,checking the problems in the initial design and optimizing it initially.(2)Deeply design the BIM optimized scheme with rational deep foundation pit software,analyze the horizontal displacement of the supporting structure and the surrounding ground subsidence,and then verify its overall stability,anti-overturning stability and anti-uplift stability.(3)The numerical simulation of the optimization scheme and the initial scheme is carried out by Plaxis2 D.The deformation of the soil during the excavation of the foundation pit,the horizontal displacement of the supporting pile and the bending moment of the pile are analyzed.The deep excavation depth of the foundation pit,the horizontal displacement of the retaining pile and the variation law of the surface subsidence.(4)Compare the initial scheme with the numerical results of the optimization scheme to prove the effectiveness of the optimization scheme.At the same time,the horizontal displacement,settlement and deep horizontal displacement monitoring data of the top slope are analyzed and compared with the Plaxis2 D numerical simulation results of the optimization scheme to verify the feasibility of the optimized scheme to ensure the safety of excavation process sex.The research of this paper is a combination of BIM technology and numerical simulation technology theory and practice,which is very important for the design and construction of deep foundation pit engineering.