Abstract: With the development and utilization of urban underground space, shallow buried rectangular pipe jacking engineering is widely used. The surface deformation caused by pipe jacking construction has an impact on the safety of superstructures. Based on the model test method, a laboratory model is designed to simulate the jacking process of rectangular pipe jacking, and the law of soil disturbance and deformation is analyzed. The test results show that the transverse influence range of ground settlement mainly occurs at twice the pipe jacking width from the pipe jacking center line, and the surface uplift mainly occurs directly above the pipe jacking. The subsequent pipe jacking construction will continuously disturb the soil layer in the jacked area, and the ground deformation monitoring shall be strengthened during the construction process. In addition to preventing excessive ground settlement, it is also necessary to prevent surface uplift damage caused by back soil effect in shallow buried rectangular pipe jacking. The research results can provide a reference for the design and construction of relevant rectangular pipe jacking project.

Key words: rectangular pipe jacking, ground settlement, model test, shallow buried tunnel, construction disturbance