铜头电站大坝是国内第一座在下第三系砾岩上建筑的双曲薄拱坝 ,由于砾岩形成的时代新 ,岩石成岩固结程度相对较差 ,且砾石和胶结物均主要为碳酸盐类 ,因此岩体中发育有岩溶 ,岩溶成为大坝的主要工程地质问题。通过对坝区砾岩岩溶的分析研究 ,阐明了坝区岩溶发育规律 ,根据拱坝特点 ,采取了一系列工程处理措施 ,处理后效果显著。 The dam of Tongtou Hydropower Station is the first hyperbolic thin arch dam built on the lower Tertiary conglomerate. Because of the new age of conglomerate, the degree of diagenesis and consolidation of rock is relatively poor, and the gravel and cement are mainly carbonated Therefore, karstification develops in the rock mass and karstification becomes the major engineering geological problem of the dam. Through the analysis and study of conglomerate karst in the dam area, the law of karst development in the dam area is clarified. According to the characteristics of the arch dam, a series of engineering measures have been taken and the result is obvious after the treatment.