牛—滇补水工程大五山隧洞寒武系地层工程地质问题

THE ENGINEERING GEOLOGY FEATURE OF CAMBRIAN STRATA OF DAWUSHAN TUNNEL OF NIULANJIANG RIVER—DIANCHI LAKE WATER SUPPLY ENGINEERING

大五山施工隧洞中寒武系地层最长,工程地质问题突出,尤以断裂裂隙发育,地下水水位较高,涌水、涌砂、塌方、泥化等常见。施工前期、施工过程等不同阶段,采取不同的预防措施和适时处治工程,保证了工程进度和质量。

The distribution area of Cambrian strata the longest one in Dawushan tunnel construction. The engineering geological problems are prominent, especially the frequent development of fault and fissure, high level of underground water, welling, sand boil, collapse, etc. In the early period and other different stage of the construction, we have carried out different prevention measures and suitable processing building, which have ensured the construction progress and quality.