Study On The Influence Of Deep Foundation Pit Construction On Underground Comprehensive Pipe Gallery

As the city buildings and underground pipelines dense,more and more strict to the requirement of deep foundation pit excavation,not only to ensure the safety of the excavation process,while also ensuring foundation pit draw neighboring buildings and underground pipelines completely within the scope of normal operation.Therefore,it is very important to study the subsidence and displacement of surrounding ground and adjacent underground pipeline.The research of domestic and foreign scholars mainly focuses on the deformation of foundation pit support structure and the settlement of surrounding surface,and focuses on excavation of foundation pit in soft soil foundation.Numerical analysis research has focused on the 2 d plane analysis method in finite element simulation analysis,a few studies using the 3 d spatial analysis also seldom will be under the jurisdiction of the underground and supporting structure,the soil near the combination as a whole for the deformation of underground pipeline simulation analysis.Based on the research results of domestic and foreign scholars,this paper uses ABAQUS finite element software to simulate the influence of deep foundation pit construction on the underground comprehensive pipe corridor.The main contents are as follows:1.This paper introduces the development situation of the domestic and foreign comprehensive pipe corridor and the research results of the impact of foundation pit deformation,and introduces the research content and starting point of this paper.2.The basic principle of finite element method is introduced.The finite element analysis is divided into finite element analysis and finite element analysis.The influence of ABAQUS for deep foundation pit construction on the underground tunnel was studied.In this paper,the moori-coulomb constitutive model embedded in ABAQUS finite element software is used to simulate the soil model.3.ABAQUS was used for numerical simulation to simulate the excavation of deep foundation pit and the supporting process,and described the influence of the comprehensive tube corridor adjacent to deep foundation pit.By setting the longitudinal connection with prestressed reinforcement,further understand caused by deep foundation pit excavation of site soil deformation of prestressed reinforcement stress and strain,the quantity of the roots of the pipe gallery flat-fell seam open simulation to provide some reference for future similar projects,ensure the normal use of the pipe gallery.4.Analysis of the excavation and support process of deep foundation pit,the different distance between deep foundation pit and comprehensive tube corridor and the different buried depth of the comprehensive tube corridor,the influence of deep foundation pit excavation on the comprehensive tube corridor.