Grouting, Plugging and Spraying Waterproof Demonstration Test in Tunnel
of Underground Hydropower Station in the Right Bank of Three Gorges

1 Introductions
2 Analysis of reasons for leakages
3 Solutions
4 Application
4.1Waterproof materials
4.2Equipment and machines
4.3Process of application
5 Results
5.1Status before treatment
5.2Current situation after treatment
6 Several suggestions
7 Conclusions

Grouting, Plugging and Spraying Waterproof Demonstration Test in Tunnel
of Underground Hydropower Station in the Right Bank of Three Gorges

1 Introductions
　　In order to resolve the leakage and waterproofing problem in the main plant and traffic tunnel of underground hydropower station in the right bank of Three Gorges, our company delegated LIU Lian-xi and other seven people for the invitation of the Three Gorges Project Development Corporation. Using our company’s special waterproof materials and spray equipments, we had done the grouting, plugging and spraying waterproofing test in the serious leakage part of the Three Gorges underground power station traffic tunnel and 1# tailrace tunnel from 11, January to 17, January in 2006. Under the strong support of the Three Gorges Project Development Corporation, the test achieved a complete success and was unanimously admitted by the leaders (three chief engineer) and supervisors of the Three Gorges underground power station.