水电站应用导管法水下浇筑不分散混凝土的实例

Non-dispersible Underwater Concrete Construction by Tremie Method in a Hydropower Station

湖南省益阳市某水电站大坝上游弧门前有大面积冲刷坑,最深处达3 m,最浅处约0.6 m,存在比较严重的冲刷破坏,通过应用导管法水下浇筑不分散混凝土的方法对破坏区域进行补强加固,区域水力学条件大为改善,抗冲蚀能力明显提高,成功消除了危及大坝安全稳定运行的重大隐患,确保了电站发电、防汛两不误。

In a hydropower station in Yiyang City of Hunan Province, large area scour damage is found in the dam before the radial gate with the maximum scour depth of 3 m and the minimum of 0.6 m. Then, the damaged area body is re- paired using the non-dispersible underwater concrete. The tremie method is adopted for the underwater concrete con- struction. After the treatment, the regional hydraulics conditions are greatly improved and the anti-scouring ability is dramatically increased. The major risk that would affect the safe and stable operation of the dam is eliminated successful- ly. Both the power generation and flood control requirements are satisfied.