Numerical Simulation Research of Soil Deformation Caused by Pipe Jacking Construction

Pipe jacking construction produces disturbance to the original formation, causing soil mass deformation and ground subsidence. Based on municipal sewage pipeline engineering in Xi'an, the process of pipe jacking construction was simulated by using the three-dimensional finite element method. In particular, the ground deformation caused by the construction disturbance was researched. The results showed that the deformation of soil is mainly distributed in the departure area and pipe jacking pressure surface. The size and distribution of the plastic zone of soil around the segment was analyzed, and the numerical simulation results and field test results are consistent. At the same time, in order to control the settlement of formation, the large plastic deformation area should have grouting reinforcement. The results have provided theoretical guidance for the safety of the pipe jacking construction.