The Study Of Deformation Laws Of Deep Foundation Pit And Its Design Considering The Influence Of Adjacent Building

The design of the foundation pit support should not only take into account the safety of the whole supporting structure in the construction process,but also the deformation of the structure and the surrounding soil,which is to ensure the safety of the adjacent buildings and underground public facilities.Therefore,it is a very important and urgent problem to ensure the safety,reliability,economic rationality and practicality of the foundation pit project in the construction of the modern city.In this paper,a deep foundation pit project in Xi'an is taken as the background,and considering the design of the supporting structure in the case of adjacent buildings,and the deformation law is also studied.The main research is as follows:1.Additional stress generated from the influence of adjacent buildings on the foundation pit retaining structure was studied,and the influence of buildings with different distances and different foundation depth on the foundation pit structure was also discussed.2.The common supporting forms,the failure forms of the supporting structure,the deformation law of the foundation pit,the deformation mechanism,the influencing factors of deformation and the control measures of the deep foundation pit were summarized.3.According to the actual engineering background,considering the additional stress exerted by the adjacent building on the retaining structure,the internal force,the fulcrum force and the bending moment under each working condition were calculated,and the design of the deep foundation pit support was carried out.4.The numerical simulation software was used to simulate the engineering excavation.The safety and rationality of the support design were verified.And the distance between the adjacent buildingand the foundation pit,foundation depth were simulated to study the influence of them on the excavation deformation of the deep foundation pit.5.Combined with numerical simulation results and engineering data,the support designwas further verified.Meanwhile,the deformation law of deep foundation pit excavation in this area was analyzed,and it can provide a certain design basis for similar projects in the region.