Study on Ground Settlement and GFRP Reinforcement Deformation of Shield Barrier-Free Launching and Receiving

At present, the technology of using GFRP reinforced pile as enclosure structure at the launching and receiving ends of shield has been widely used at home and abroad. However, excessive deformation has been found at the receiving end of the GFRP reinforced pile. In order to solve this potential safety hazard, the construction technology properties of the launching and receiving ends are compared and analyzed, and three-dimensional numerical simulation method is used to analyze the ground settlement, GFRP reinforced pile deformation law and differences. The research results show that the GFRP reinforced pile has complex stress, high construction difficulty and many risk factors, and the control of shield thrust is very critical; Compared with the launching stage, the GFRP reinforced piles in the receiving stage need to pocess higher flexural and shear bearing capacity to ensure the stability of the opening, which has a certain reference value for the envelope design of similar projects.