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一、注浆止水目的西湖引水隧洞在现浇与锚喷混凝土结束后，两帮、拱顶和底板的某些地方出现渗水现象。原因是石灰岩水系发育、节理密集、透水性良好。渗水存在一定压力（约0.1MPa左右）。对于涌水量较大处，已在浇和喷混凝土时用管道引水。隐隐渗水处不易发现，在浇注和锚喷工作结束后，有一定压力的水便从强度不足的混凝土里挤出来滴下或沿壁流下。另外，在两帮与拱顶交界处，我们使用喷混凝土的回弹物堆集此处，形成三角区。由于堆集不密实，某处从围岩渗出水经过此区，形成一段区域渗水，并沿帮壁下流。滴水中携带的碳酸钙成份沉积在滴水处周围或巷道壁上，如不采取措施，随着节理裂隙的扩张，水量也越来越
First, the purpose of grouting water stop West Lake diversion tunnel in the cast-in-place and anchored concrete after the end of the two gang, vault and floor some places seepage phenomenon. The reason is limestone aquifer development, joint intensive, good water permeability. Water seepage there is a certain pressure (about 0.1MPa or so). For large influx, has been poured and sprayed concrete pipe with water. Faint water seepage is not easy to find, pouring and anchor spray at the end of the work, there is a certain pressure of water will be out of strength concrete out of the drop or flow along the wall. In addition, at the junction of the two gangs and the domes, we use a rebound of shotcrete to accumulate here, forming a triangle. As the accumulation is not dense, somewhere from the surrounding rock seepage water through this area, forming a section of water seepage, and along the wall to flow. Dripping calcium carbonate components deposited in the drip around or roadway walls, if not take measures, as the expansion of joint fissures, the water is getting more and more