Study On Deformation Of Supporting Structure Of Deep Foundation Pit

With the improvement of people’s living standard and the rapid development of urbanization,convenient transportation has become the key to the development of economy and the promotion of urbanization.However,the growing number of buildings has led to a large reduction in the overground space,traffic congestion,it is clear that the continued development of traffic in the crowded overground space is not a long-term solution.The development and utilization of underground space can effectively solve this problem,the subway this environmental protection,fast underground transportation mode arises at the historic moment.All over the world,great efforts have been made to develop the subway,and the deep foundation pit project,as a crucial link in the process of subway construction,must be treated as a top priority.Region has a great influence on deep foundation pit engineering.Different hydrogeological conditions,soil structure and parameters are also different.Due to the different hydrogeological conditions faced by the popularization of subway engineering,the difficulty of foundation pit engineering is also increasing.Based on the theoretical analysis of the foundation pit engineering and the actual monitoring data of the foundation pit engineering of the west extension line of changchun metro line 2,Midas/GTS numerical simulation software is used to analyze and study the deformation of the foundation pit.The research background and significance of the foundation pit are described.Based on the research status of the foundation pit at home and abroad,the supporting types of deep foundation pit are simply introducedThis paper introduces the foundation pit deformation monitoring instrument and its working principle in detail.In this paper,Midas/GTS is used to conduct 3d modeling for the foundation pit engineering of the west extension line of changchun metro line 2.By comparing and analyzing the change law of pile top settlement,surfacesettlement,pile top lateral movement monitoring data and simulation data,the growth trend and change of the two are basically consistent.It can be concluded that the numerical simulation can truly reflect the deformation of foundation pit support structure to a certain extent,which provides theoretical basis and reference value for the later stage of subway foundation pit support.