Study On Influence Of Adjacent Subway Station Foundation Due To Deep Foundation Pit Excavation

With the urban construction scale of the escalating and the floor space increasing saturation, people began to look towards the underground space to find room for urban development--development and utilization of the urban underground space. And the development and construction of underground space is the first excavation. Along with the development of underground space level unceasingly thoroughly and the scale of excavation more and more larger, engineering problems encountered more and more, and enabling calculation of the traditional theory of excavation project can not meet the ever-changing project requirements. For example, the mutual influence of two adjacent deep excavation pit at the time which is currently one problem to be solved. Is well known, classical Rankine's and Conclom's theories earth pressure theory, uses a semi-infinite soil assumptions. However, with the two adjacent deep excavation pit at the same time, the role of the proposed excavation of earth pressure on retaining structure is a limited scope of soil earth pressure, from the calculation theoretical, the traditional theory of lateral pressure and the stability of the calculation has been unable to fill the limited circumstances consistent with the calculation, but how to solve this new problem is before us a new task. This new research projects, enrich the field of computational theory and solve practical problems in engineering has an important theoretical research and practical significance.In this paper, Suzhou Industrial Park Jinhe Square excavation as the background, use of theory with practical methods and the use of finite element simulation analysis of the entire process of deep excavation, research influence of adjacent subway station foundation due to deep foundation pit excavation and construction protection measures.In this paper, Systematic analysis of the structure of the foundation pit design theory and analysis of finite element theory in the deep foundation engineering and progress. This article is based on the actual situation, consider the complicated geological conditions, supporting measures, excavation methods and other factors and establishment of a limited soil earth pressure calculation model, according to two conditions--the status quo of excavation and the excavation pit in the end,analysis the variation of retaining structure horizontal displacement and after the wall surface settlement when the subway station excavation. And introduction of contact surface model,this model more realistic simulation of the soil-structure interaction and make simulation results closer to the true value, thus ensuring the accuracy of simulation results.Last, According to the measured data, verify the feasibility and practicality of numerical analysis program and demonstrate the rationality of using parameters, and put forward some measures to control the deformation of foundation pit method. To get some of meaningful conclusions and recommendations of similar design and construction of deep foundation pit...