Study On Stability Of The Deep Foundation Pit In Xinfalu Station Of Suzhou Subway

With the continuous development of the national economy, and the continues growth of urban population, the urban traffic congestion has become an urgent need to solve the problem. The development of the ground space is not satisfied with the traffic demand. And the development of underground space has become the mainstream, the deep foundation pit engineering in high-rise buildings, for example subway tunnels, bridges, municipal engineering and other major projects in the emerging, and rapid development. Deep foundation pit engineering is a difficult and complex system engineering in the subway.In this paper, the research background is based on the deep foundation pit of Suzhou Metro Line 2. It has complex geological conditions, and the length and width of foundation pit. Surrounding environment is more complex.This paper analyzes and studies basing on as the whole of the foundation of the underground continuous wall, supporting structure, the surrounding soil and the surrounding buildings. The paper uses the finite element software MIDAS-GTS to establish the three-dimensional model of the foundation pit to simulate and analyze the stability of the foundation pit itself and the surrounding environment. The deformation of foundation pit supporting structure deformation and stress and deformation of surrounding soil are analyzed, and the influence of foundation pit engineering construction on deformation of ground surface deformation and deformation of surrounding buildings is summarized.In the paper, the monitoring data of foundation pit construction is analyzed, and compared with the numerical simulation results, it is found that both of them are basically the same. It can be explained that the stability of the deep foundation pit of soft soil is reasonable under the MIDAS-GTS software.