贵州省开阳县三岔河水库混凝土拱坝设计

Concrete Arch Dam Design of Sanchahe Reservoir in Kaiyang County, Guizhou Province

三岔河水库为地方性水利工程,工程投资控制较严。设计根据地形地质条件,优选坝轴线,优化体形设计,采取合理的基础处理措施;泄洪采用挑跌流结合坝下水垫塘的消能型式;提出大坝混凝土温度控制的标准和可行措施;大坝结构和构造设计力求简化。设计及建设实践表明,拱坝设计较为合理,75 m的高拱坝坝体混凝土总方量仅10万m^3,取得了较好的经济效果,可供类似工程参考。

Sanchahe Reservoir is a local water conservancy project with strict investment control. According to the topographic and geological conditions, the dam axis and the dam shape are optimized, reasonable foundation treatment measures are also considerred. The energy dissipation type of overhang-drop flow combined with plunge pool under the dam is adopted in the design. The criteria and feasible measures for temperature control of the dam concrete are proposed. Dam structure and constructional detail design was simplified. The design and actual construction show that the design of the arch dam is reasonable. The total concrete volume of the 75 m high arch dam is only 100 000 m^3, which has greatly reduced the cost and can be used as a reference for similar projects.