Numerical Simulation Analysis To Influcences Of The Existing Buildings Out Of The Excavation Of Foundation Pit

The successful completion of a deep foundation pit project not only ensures the safety of the foundation pit itself,but also ensures the structural safety of its surrounding environment.If the horizontal displacement of the envelope structure will cause the surrounding surface settlement,the greater the settlement value,it will lead to the surrounding buildings to varying degrees of settlement,the consequences could be disastrous.Therefore,in order to ensure the safety of the foundation pit and the surrounding environment,we must consider these factors in the design and monitor the whole process in the construction stage.By establishing a three-dimensional numerical model of a foundation pit and comprehensively analyzing the Settlement rules,to further put forward to ensure the foundation pit and the surrounding environment related measures.In this paper,a deep foundation pit excavation in Shijiazhuang City as the research background,to design a scientific and rational support program.Based on the project example,the numerical simulation software MIDAS GTS was used to establish the integrated three-dimensional numerical model of the supporting structure of the foundation pit and the surrounding building environment.The Mohr-Coulomb yield criterion was applied to summarize the deformation of the foundation pit Objects,the surrounding surface subsidence)regularity.According to the calculation results of three-dimensional finite element method,the influence of excavation process on the buildings around the foundation pit is studied to provide a theoretical basis for ensuring the safety of the foundation pit and the surrounding structures,and also to provide reasonable construction for ensuring the foundation pit and the surrounding environment Suggest.The comparison between the monitoring data and the numerical results of the foundation pit and the adjacent buildings verifies the accuracy of the data predicted by the excavation and deformation effects of the foundation pit.The deformation of the foundation pit is analyzed and the deformation law of the foundation pit is obtained This is the guide to further optimize the parameters of foundation pit support.