【摘要】 针对万家沟水库坝址区工程地质条件复杂，岩体节理裂隙发育、覆盖层厚和完整性差等不良地质问题，采用高密度电法和钻孔成像物探测试，结合钻孔探查和室内注水试验等方法，相互对比验证查明影响工程安全稳定的关键因素，获得坝址区地层情况及断层破碎带分布规律等详实可靠的地质数据资料。结果表明：坝址区岩体大部分处于弱透水带中部，河床岩体完整性相对较差，裂隙发育，存在绕坝渗漏等可能。通过帷幕灌浆防渗处理后，大坝具备成库条件。更多还原

【Abstract】 In response to the complex geological conditions of the Wanjiagou Reservoir dam site area, such as the development of rock joints and fissures, thick and poor integrity of the covering layer, high-density electrical methods and drilling imaging geophysical testing were adopted. Combined with drilling exploration and indoor water injection tests, key factors affecting the safety and stability of the project were compared and verified, and detailed and reliable geological data such as the geological conditions and distribution patterns of fault fracture zones in the dam site area were obtained. The results indicate that the majority of the rock mass in the dam site area is located in the middle of the weakly permeable zone, and the integrity of the riverbed rock mass is relatively poor, with developed cracks and possible leakage around the dam. After curtain grouting anti-seepage treatment,the dam has the conditions for reservoir formation.更多还原