The Study Of The Influence Of Deformation Of Subway Tunnel Shield Tunneling On Adjacent Pile Foundation Of Building

With the advance of urbanization, the subway as a fast, large capacity, social greenpublic transport, occupy an increasingly important position in the modern metropolis oftraffic. Ground movement and deformation caused by the construction of subway ownbuildings and facilities can not be ignored. Same as other forms of tunnel excavation method,the Shield Tunneling Method will disturb the surrounding rock, destruction of the originalstress equilibrium。Lines passing through the bustling downtown area, most of the high-risebuilding with pile foundation, Buildings adversely affect the deformation and stress in thisprocess, body weight distribution to be close to the building (structure).Therefore, to reducethe shield construction on existing pile foundation is an important research topics。In this paper, on the basis of summing up the existing research, the shield law causesurface deformation characteristics,combine the characteristics of shield construction process,elaborate analysis of the mechanism causing these deformation。On this basis, this paperanalyzes the response of the pile foundation and the upper structure deformation caused byshield construction.Reasonable assumptions, the use of large-scale finite element software Midas GTSnumerical calculation model, this article analyses the four conditions of shield construction onthe existing pile foundation. In the shield construction model of numerical experiments, themodel takes into account without spatial location of the pile foundation and tunnel shieldconstruction, the construction phase of the simulation, the simulation of grouting materialsand grouting pressure, soil lining and pilebase soil contact interaction simulation. Literatureand the calculated results of the model and the actual project monitoring results werecompared to verify the reasonableness of the numerical model of the simulated shieldconstruction. Analysis method and the model is applied to the Tianjin Metro Line Tucheng station to the south tower station construction engineering design optimization。...