Study on the Mechanical Properties of Large Rectangular and Shallow Embedded Pipe-Jacking During Pushing-Process

Abstract With the continuous increase of urban population, the development degree of urban underground space is increasing, and the pipe jacking method has been widely used in the construction of urban underground space. This paper analyzes the disturbance mechanism of the pipe jacking construction on the surrounding soil, and analyzes the actual results of the surface subsidence in the rectangular pipe jacking project of Baima Road in Fuzhou Baolong Wanxiang Square and the civil defence project. By combining the three-dimensional finite element model, the law of ground surface settlement and deformation during the construction of shallow-buried large-section pipe jacking under the conditions of coastal stratum is studied. And through the on-site monitoring settlement data of the project and the finite element simulation, the ground surface subsidence deformation law and the pipe-tube stress variation law of the shallow-buried large-section pipe jacking under the coastal stratum are mastered, which can be used for the design and construction of related similar projects for reference in the future.