中文摘要：

针对水电工程建设中广泛存在的岩溶问题,结合地质勘查资料,在分析区域地质环境、库区岩性、地质构造等条件的基础上,对裂隙性岩溶的分布规律与成因机制进行了分析。资料分析表明,该坝肩的岩溶是风化卸荷与构造作用等内外动力综合作用的结果,是北方岩溶形成的典型模式之一。鉴于裂隙性岩溶的空间位置的重要性,结合现场压水试验资料,对坝肩岩体的渗透参数取值进行了探讨,并对岩溶渗漏问题和加固防渗措施进行分析研究,为岩溶渗漏加固方案的选取提供了合理的依据。

英文摘要：

The problem of karst is often encountered in constructions of hydropower projects in China.Based on the geologic survey data and analysis of the geologic environment,rock,and geologic structure,this paper discusses the distribution pattern and the genetic mechanism of karst.The result indicates that the karst above the left dam abutment is the result of internal and external force coupling effect,and also one of the typical modes of karst formation in northern China.Considering the importance of the spatial location of the karst,this paper discusses the seepage coefficient and studies the seepage problem and the anti-seepage measures according to the field pump-in test.The research result provides a reasonable basis for the selection of the karst anti-seepage scheme.