单斜构造岩溶发育区成库条件分析及工程处理措施

碳酸盐岩地区修建水库,尤其要注意水库渗漏问题。云南某新建水库坐落在向斜山山坡上,水库周边岩溶发育,地质环境复杂,存在岩溶渗漏问题。为保证该水库顺利修建,针对其岩溶渗漏问题,在开展工程地质测绘、岩溶调查统计、钻孔勘探及压水试验等工作的基础上,分析了水库区岩溶发育规律及地下水分布情况,并对库尾岩溶进行了重点分析,结果表明水库库尾存在岩溶渗漏的可能性较小,而右坝肩及右岸山体存在永久性渗漏的可能。针对这一问题,结合岩层透水特性的分析,提出采用帷幕灌浆的方法对水库岩溶渗漏问题进行处理。

Analysis of Reservoir Forming Conditions and Engineering Treatment Measures for Monocline Tectonic Karst Development Area

Reservoir leakage should be paid special attention to when constructing reservoir in carbonate rock area.A newly built reservoir in Yunnan Province is located on the slope of syncline mountain.The karst around the reservoir is developed,and the geological environment is complex,so there is karst leakage problem.In order to ensure the smooth construction of the reservoir,based on the engineering geological mapping,karst investigation and statistics,borehole exploration and water pressure test,the karst development law and groundwater distribution in the reservoir area are analyzed,and the karst at the end of the reservoir is mainly analyzed.The results show that the possibility of karst leakage at the end of the reservoir is relatively small,while there is a possibility of permanent seepage in the right dam abutment and right bank mountain.To solve this problem,curtain grouting is proposed to deal with the karst leakage of reservoir in combination with the analysis of permeability characteristics of rock strata.