天生桥水电站暗河混凝土拱堵头补强加固设计

论述了天生桥水电站封堵天然暗河，形成以山体挡水的水库特点、原暗河混凝土拱堵头的设计情况、施工质量事故产生的原因以及采取防渗截漏、灌浆补强、降低堵头内部应力等综合补强加固措施，工程建成投入运行以来，原廊道和堵头下游的漏水点全部消失，补强加固防渗效果显著。

Consolidation Design of Concrete Caulking the Underground River for Tianshengqiao Hydropower Station

The concrete caulking the underground river for Tianshengqiao Hydropower Station was expounded in the paper. By caulking, the hill body blocked the water and reservoir was formed. The features of the reservoir, the design of concrete caulking, the cause of construction accident were analyzed, and the measures for seepage prevention, grouting consolidation, and lower down internal stress in the caulking were demonstrated. The leakage in the gallery and downstream the caulking has been disappeared since the completion of caulking, the seepage prevention effects are distinct.