Abstract：Research purposes: The disaster accidents of burst water, mud and collapse occurred easily in construction of Yichang-Wanzhou Railway due to the complicated engineering and hydrologic geologies with karst, water in karst, underground river and their developments, which threatened the safety of tunnel construction 1. A set of economic, safe and feasible measures were explored through making treatment of underground river at Wuzhaoguan so as to guarantee the safety of construction and operation, which provided experience for similar construction.
Research methods: The engineering comparison and sate experiment were made.
Research results: The research and demonstration were made on construction order, diversion, grouting process, grouting materials and grouting parameters for the transverse hole and bottom plate of treated underground river as well as supporting structure, prevention and drainage of water for the tunnel during treatment of underground river in order to make the measures feasible.
Research conclusions: The upper bench of Wuzhaoguan Tunnel passed through underground river successfully through taking a serious of engineering measures. The practice proved the treatment measures were feasible.
2006, Vol. 23 
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