纳学水库坝址区工程地质条件分析与坝型比选

Analysis of Engineering Geological Conditions and Comparison of Dam Types in the Dam Site Area of Naxue Reservoir

纳学水库坝址区水文地质较复杂,区域构造稳定性较差,强风化破碎岩体及断层裂隙共存于库区。为确保水库蓄水成库后具有较高经济效益,结合坝址区工程地质勘察成果,对建坝坝址、坝型及工程地质条件进行详细比选论证。设计优选的上坝址面板堆石坝枢纽,能充分利用区域水资源、坝型地形地质适宜性好,方案技术可行且经济。纳学水库坝址区详细的工程地质勘察,针对性地查明影响工程建设的不利地质体及渗漏稳定性等关键因素,为后期设计施工提供了合理的建议和处理措施。

The hydrogeological conditions in the dam site area of Naxue Reservoir are complex,and the regional structural stability is poor.Strong weathered and fractured rock masses and fault fissures coexist in the reservoir area.To ensure high economic benefits after the reservoir is filled with water and combined with the results of engineering geological survey in the dam site area,this article conducts a detailed comparison and demonstration of the dam site,dam type,and engineering geological conditions for dam construction.The optimized design of the upper dam site face rockfill dam hub can fully utilize regional water resources,and the dam type has good geological and topographical suitability.The scheme is technically feasible and economical.The detailed engineering geological survey of the dam site area of Naxue Reservoir has identified key factors such as unfavorable geological bodies and leakage stability that affect the construction of the project,providing reasonable suggestions and treatment measures for later design and construction.