裂隙岩体注浆技术在长春地铁中的应用

地铁隧道建设中地下岩体裂隙形成的涌水通道致使地下水渗入隧道洞室,危害地铁运营安全。结合长春地铁2号线解放大路站—平阳街站区间隧道渗水情况,采用先深后浅,最后重点部位强化注浆方式综合治理围岩裂隙涌水获得了良好的治理效果,有效地根治了地铁隧道初期支护背后围岩裂隙涌水的问题,以期该技术为地铁隧道初支背后注浆提供借鉴。

Application of grouting technology in fractured rock mass in Changchun metro

In subway tunnel construction,water gushing channel formed by the underground rock fracture causes the underground water to infi ltrate into the tunnel chamber,endangering the subway operation safety.Based on the water seepage situation of the tunnel between Jiefang Road Station and Pingyang Street Station of Changchun metro line 2,this paper discusses the comprehensive measures of the surrounding rock fi ssure water gushing by adopting the method of fi rst-step deep and second-step shallow,and fi nalstep strengthening the grouting at the key parts and it has achieved good countermeasure effect,effectively eradicating the problem of the surrounding rock fissure water gushing behind the initial support of the metro tunnel,providing a reference for the grouting behind the initial support of the metro tunnel.