Study On The Stability Of Enclosure Structure For An Open-Cut Metro Station

With the development of economy of our country, subway plays a vital role in overall arrangement of a city, such as city planning, traffic, economy and environment and so on. The primay task in constructing subway is to maintain the stability of enclosure structure of subway station. Deep excavation is fundamental basis of subway station. To ensure its security is of significant economic and social benefit.Pit deformation is influnenced by many factors, such as soil physical parameters, the size of support force, the design of diaphragm wall, the size of support prestressing and so on. The stability of pit becomes a research focus. At present, the calculation methods of pit deformation at all over the world include finite element method, the soil loss theory and equivalent method, of which the finite element method can take all deformed factors into consideration and predict all kinds of deformation of pit. So, this paper will make use of finite element method as principle calculation method.This thesis studies the stability of the enclosure structure of subway station by using numerical simulation.In this thesis, the importance of the stability of deep excavation was analyzed, the calculation methods were discussed and the application of the deformation of the enclosure structure of deep exaction was studied.By using the calculation software of Midas GTS, numerical simulation was carried out to research the deep excavation of subway station in 2nd affiliated hospitalof Harbin medical university.It solved the following problems about the stability of enclosure structure of deep excavation:(1) Precise numerical simulation research was taken as a prerequisite for the reseach of the stability of subway station;(2) The result of numerical simulation was analyzed;(3) All factors influenced the stability of enclosure structure of deep excavation was analyzed.Through reseaching above mentioned problems, this paper can figure out the the stability of enclosure structure of deep excavation.lt can provide the guidance to the construction of the similar Engineering and the standardized design of the subway station in the future...