岩溶区隧道注浆技术质量控制

Quality control of grouting technology of crossing karst area

岩溶地区地质条件复杂,同时多伴随岩溶涌水,高水压、突泥给隧道施工带来诸多困难,目前解决这一难题,通常采用注浆技术加固地层,但是注浆技术工序复杂,稍有不慎难以保证注浆质量,导致施工失败。文章结合国内具有"隧道设计、施工禁区"之称的圆梁山隧道某一标段正洞导坑出现的突泥突水现象,对注浆技术加固地层进行阐述。

The karst geological conditions are complicated, with karst water gushing over at the same time, high pressure, sudden mud and pose bring many difficulties to the tunnel construction. The current solution to this problem is usually grouting reinforcement strata, but the grouting process is complex, and it is difficult to guarantee the quality of grouting for a slight mistake, resulting in construction of failure. In combination with pit water inrush phenomenon of Yuanliangshan tunnel - hole which is so - called ＂restricted area for tunnel design and construction＂, reinforcement strata grouting technique is elaborated.