Analysis Of The Influence Of Deep Foundation Pit And High Rise Building Construction On The Subway Tunnel

Deep foundation pit and high-rise building construction,is the two often in the subway lines around the typical engineering activities.In the existing tunnel excavation,will inevitably lead to the bottom soil resilience and tunnel uplift,when the value exceeds a certain range of tunnel deformation,it will affect the safe operation of the tunnel,so the tunnel deformation caused by excavation is strictly controlled.Due to the complicated geographical location and geological conditions,the subway tunnels are often located on the basis of the pile foundation of the upper part of the foundation.With the construction of the superstructure,the load on the pile foundation is increased,and the influence on the tunnel is also greater.In practical engineering,because people pay more and more attention to the use of space,building high-rise towers in plots also often built around the tower around the podium,the completion of the construction project after the builders in the complete and comprehensive consideration,the underground space will be the focus of such projects.Therefore,the deep foundation pit and high-rise building construction on the impact of the subway tunnel is a prominent two problems.In order to explore this kind of influence,this paper relies on the project of Financial Street City,Chongqing City,to analyze the influence of the high building and deep foundation pit of the E15-2 and E15-1 block on the construction of the metro line.Collection of small tunnel design and terutoshi high-rise building deep foundation pit design,influence of disturbance on the displacement of the pit within the tunnel and the surrounding soil are calculated,finally the safety of the structure is evaluated,the results are as follows:(1)Collection of small tunnel design data and terutoshi deep excavation of high-rise building design,explore the best construction process of deep foundation pit project;according to the construction process of deep foundation pit,terutoshi discussion high-rise building high-rise buildings built after the completion of displacement disturbance within Tunnel and surrounding soil body;(2)According to the deep excavation of high-rise building and construction of the tunnel deformation and soil disturbance degree of additional internal force calculationof tunnel structure resulting from the safety evaluation of the tunnel horizontal and vertical structure;at the same time calculation of structure safety after excavation pile plate retaining wall.(3)According to the results of safety assessment,the safety of deep foundation pit and high-rise building in the construction process is discussed in the end.