The Influence Of The Subway Station And Overpass Integration Of Construction For The Support Structure And Surrounding Rock

Currently,the economy is in a stage of rapid development and the urban population is also growing rapidly, resulting in the urban traffic situation of deterioration, it becomes the city's economic development bottleneck. So many cities in our country are speeding up the construction of urban transportation facilities,the rail transit and viaduct are very popular in recent years. But in some bustling Old Quarter, the planning of roads red line is limited,so it is unable to widen the road. In the future,in order to avoid the level crossings changed to three-dimensional transport lead to municipal pipeline secondary demolition,in this article the integration of subway station and overpass, were designed, constructed and used at the same time. However, currently the subway station-overpass combined project is scarce and mature construction experience is limited. Some problems are presented during design and construction process.This paper is based on deep excavation Mingguang Station and Overpass integration of the first rail transit of Hefei constituted the background,on the basis of relevant research results on the analysis of home and abroad,taking theoretical analysis, site monitoring and numerical simulation method. It focus on discussing the subway station-overpass combined structure of Long Strip Foundation excavation that the support structure and rock in the section stratified construction process of interaction. The main achievements of the paper were summarize as follow:1. Summarizing current research results in terms of Deep Station Foundation, concluding some deformation characteristics of deep foundation pit of metro station.2. Studying deformation mechanism and the theory of Deep Foundation, analyzing of the calculation method of earth pressure, and establishing a two-dimensional finite element model is established,and comparing its results with the moment Lizheng software calculations.3. According to the field monitoring program and analysis of monitoring data collation, it mastered the variation of ground settlement, enclosure structure displacement and pit resilience during construction.4. The actual process of deep excavation pit was simulated by using finite element analysis software Midas GTS,comparing numerical results with experimental results analysis,verifying the model of accuracy and rationality of parameters; and using numerical simulation to analyze the variation of different methods of excavation pit of Long Strip Foundation envelope displacement, surface settlement, axial force and pit resilience,verifying that the correct rationality actual construction process of excavation methods.