Study On The Influence Of Stratum And Pile Foundation By Shield Tunneling

Subway shield tunnel construction will cause stress redistribution around the surrounding soil,resulting in displacement of the soil,and then impact on the surrounding buildings.Based on the safety consideration of the shield and existing buildings,it is of great significance to study the influence of the shield construction on the adjacent buildings.It can provide reference for the similar subway construction in the future.Taking the West Village station to Wen Jin station of Shenzhen subway line nine as the engineering background,according to the measured geological data and the design data of the engineering organization,Based on Midas GTS NX,the influence of stratum settlement on the deformation of adjacent single pile and pile group during shield construction is studied,and the internal force of pile foundation is analyzed.This article is mainly studied in the following aspects:(1)Introduced the shield construction principle,elaborated the stratum subsidence mechanism and the pile bearing characteristic,explained the Midas GTS NX simulation shield construction realization process.(2)The deformation and internal force variation of piles with different pile position of the same pile length and different pile length of the same pile position are studied under the influence of shield construction.(3)The deformation rule and internal force variation rule of pile group during shield construction are analyzed.And the pile group and the stress of single pile are studied,the regularity effect of shielding effect in pile group in.The research results in this paper summarize the performance change of pile foundation during shield construction,which provides a theoretical basis for subway construction and design,and provides reference for pile foundation reinforcement.