This paper analyzes the ground deformation during multiple parallel pipe jacking for the installation of Gongbei tunnel ......

采用地表预注浆和管棚超前预支护技术,对渝怀铁路武隆隧道进口段的浅埋、软弱围岩进行处理.实践表明,本文所采用的地层预加固方法......