Stability Analysis Of Open-cut Subway Sstation Deep Foundation Pit Support Structure

In recent years, with increasing degree of urban density, widening transportation needs, the development of the underground metro project and making full use of underground space become trend of easing traffic congestion in China's major cities. Deep excavation not only is the basis of the subway station, but also is its primary construction elements. So to ensure the safety of Deep Station Foundation is of great significance and is a prerequisite for the security of the subway station. The construction process of deep pit, the stability of its envelope is the most important issue undoubtedly for the success of its construction and is one of the key issues.First, this paper simply introduces the development of the subway station,research status now at home and abroad, theory analysis of foundation pit support structure and so on.Then, taking a subway station in Zhengzhou deep excavation engineering as example, the calculation software Beijing Lizheng excavation of deep foundation pit F-SPW7.0PB1 version, ANSYS numerical simulation and monitoring of the construction site of combine. The envelope subway station calculation, simulation, data of monitoring obtained corresponding compare, such as surface subsidence, the amount of sway around the station,etc. According to the data of construction monitoring and modeling respective analysis stability of deep foundation pit structure, and can draw its calculation,numerical simulation feasibility. Take the analysis the factors that influence the stability of Deep Foundation Supporting Structures by calculation,simulation, such as, changes in the position of supporting deep foundation pit;pit soil conditions.Through the above research, take a brief analysis of relevant factors about the stability Subway Station Deep Foundation Supporting Structures.By comparing the results of simulation and calculating under the same conditions, the research of changing position of internal support is beneficial for construction design optimization and chose different programs according to the soil of foundation pit, which provides a frame of reference for the structural design of future subway station in the region.