Treatment of Water Gushing in Working Shaft for Pipe Jacking Construction in Jinjiang Tunnel of Second West to East Gas Pipeline Project

This article introduces the design scheme of water sealing in the working shaft for pipe jacking construction in Jinjiang Tunnel of the Second West to East Gas Pipeline Project,the cause analysis of water gushing happened in the working shaft during construction and the treatment scheme.The method of applying water barrier of high-pressure rotary jet grouting piles combined with drilling grouting is taken to stop the water gushing under complex stratum conditions,and gains satisfactory effect of smooth construction progress.