花地河水库坝址坝型比选及工程地质条件评价

Comparison of Dam Types and Evaluation of Engineering Geological Conditions for Huadihe Reservoir Dam Site

花地河坝址区水文地质较复杂,强风化岩体破碎、岩溶管道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,对建坝河段、建坝坝址及大坝工程地质条件进行详细论证分析。设计优选的下坝址碾压混凝土拱坝,其坝型地质适宜性好、枢纽布置紧凑、防渗工程量小,方案技术可行且经济。花地河水库坝址区详细的工程地质勘察,针对性地查明影响工程枢纽布置及结构稳定的关键因素,为后期设计施工提供了合理的处理措施和地质建议。

The hydrogeology of Huadi River dam site area is relatively complex,with highly weathered rock masses,karst pipelines,and fault fissures coexisting in the reservoir area.To ensure high economic benefits after the reservoir is filled with water and combined with the geological survey results of the dam site area,this paper provides a detailed analysis of the geological conditions of the dam section,dam site,and dam engineering.The optimized design of the lower dam site roller compacted concrete arch dam has good geological suitability,compact hub layout,small amount of anti-seepage engineering,and the scheme is technically feasible and economical.The detailed engineering geological survey of Huadihe Reservoir dam site area has identified key factors affecting the layout and structural stability of the project hub,providing reasonable treatment measures and geological suggestions for later design and construction.