Research on Mutual Influence between Pipes of Curved Pipe-jacking Roof Project

Considering the requirements of water sealing between pipes and control precision, the pipe roof currently implemented are all straight. Due to some special construction conditions, the pipe roof method needs to break the limit of linear condition. This results in several problems such as increasing the difficulty of precision control, enhancing the mutual influence between pipes, increasing the difficulty of forming roof and other issues. This study is based on the curved pipe-jacking roof project of Gongbei Tunnel of Zhuhai Link Road of Hong Kong-Zhuhai-Macao Bridge. Through the model test, numerical simulation and field test, the mutual influence between pipes of curved pipe-jacking roof is researched, and the laws of cumulative disturbance and strain of soil, pipe-soil contact pressure, influence of trajectory are analysed. The results demonstate that maximum soil cumulative is close to secondly jacked pipe and maximum pipe-soil contact pressure is loacted at horizontal position of firstly jacked pipe. The research provides reference for the construction of curved pipe-jacking project.