The Numerical Simulation In Large Deformation Analysis Of Surrounding Building In Process Of Excavation

During the construction, a large number of deep foundation excavations have appeared. It's scale and depth increase constantly. The engineering environment of urban deep foundation excavations is complex. Urban deep foundation excavations are generally close to some constructed buildings. They influence each other and interact. The study of excavation focused more on the safety of itself wllile the influence on the building around is neglected. Through applying numerical simulation analysis, this text study excavation process to the effect of adjacent building.Firstly, this paper studies the surface displacement and deformation induced by excavation through computing and analyzing, and the influence of which on the adjacent building. For the case of deep foundation pit, this paper makes detailed analysis and summarizing.Secondly, based on the engineering geological investigation of this project, find out the construction internal and around adverse geological processes of effect engineering stability, divided into ground types and construction site, analysis and evaluation the ground and foundation earthquake effect; find out internal construction the type, thickness, distribution each rock-soil layer, find out internal groundwater burial conditions. Provided bearing capacity of foundation relative to design requirements and simulation, physical mechanical properties and deformation calculation parameters of each rock-soil layer.Thirdly, by means of three-dimensional non-liner finite element software named ANSYS to simulate and analyze the whole process of excavation, based yield criterion of Drucke-Prager, using shell element simulate the interaction between soil and supporting structure, so that improving accuracy of calculation founding out rule of the excavation process to the effect of adjacent building and optimal excavation order. The research result in this paper provides a reference for actual engineering design and construction, and has reference value for numerical simulation and analysis in the future.