Technologies of Micro-disturbance Construction of Pipe-Jacking

Abstract

As a mature subsurface excavation method, pipe-jacking has already been widely used in many fields of city construction. The fact that the construction environment becomes more and more complicated requires micro-disturbance pipe-jacking. Combining the successful micro-disturbance construction of the pipe-jacking part of Shanghai Expo Power Cable Tunnel, some methods such as the preparations before construction, disturbance controlling during different construction phases and many specific construction technologies are summarized. During pipe jacking, a lot of measures like keeping the stabilization of the excavation surface, controlling the pipe jacking speed, adopting new sludge lubricating sleeve technologies, achieving precise attitude control and conducting timely slurry replacement. It is hoped that this will be helpful to the later micro-disturbance pipe-jacking.