Deformation Mechanism Analysis Of Deep Foundation Pit Support Structure

With the application of deep foundation pit engineering in cities more and more widely,the engineering safety problems caused by deep foundation pit engineering emerge one after another.In order to make the design and construction of deep foundation pit more standard and safe,and the social and economic order more stable,the research on the support structure of deep foundation pit will be one of the biggest subjects for scientists all over the world.Based on the deep foundation pit project of the comprehensive pipe gallery of chunshenhu road,S city,this paper conducts an in-depth analysis and research on the deformation of the deep foundation pit support structure by combining theoretical analysis,numerical simulation and foundation pit monitoring.The main contents are as follows:(1)This paper based on the deep foundation pit supporting structure research status at home and abroad,the research background and significance of deep foundation pit supporting structure deformation,do a simple interpretation of deep foundation pit supporting type made simple introduction,in theory,focuses on analysis of the deformation of deep foundation pit engineering phenomena and mechanism,composition and deformation of supporting structure and the work mechanism of the basic theoretical knowledge to carry on the preliminary understanding.(2)Combined with the engineering example of the deep foundation pit of the comprehensive pipe gallery in chunshenhu road of S city,the finite element software MIDAS/GTS is used to select some standard sections of the foundation pit for 3d modeling,and the data such as surface subsidence,supporting structure deformation and soil stress around the foundation pit are obtained,and the reasons for the change are analyzed emphatically.(3)Through the comprehensive monitoring of the surface settlement,pile top displacement,pile top settlement and pipeline settlement of the deep foundation pit,based on the monitoring data and its cumulative change chart,in-depth analysis of the change rules and reasons,as well as the judgment and warning of the safety and stability of the whole deep foundation pit.(4)The numerical simulation results and monitoring data for analysis,it is concluded that in the process of the excavation simulation that the data obtained in the overall change and growth trend and the actual monitoring data,thus can be learned that the simulation results to some extent,can response the real deformation of retaining structure for the city and the surrounding urban area S similar to the design and construction of foundation pit engineering provides the theoretical basis and practical experience,have certain reference value for similar projects later.Figure[40]table[11]reference[51]...