摘要
拟建水库蓄水后形成干流库区与支沟库区,大坝坝基直接坐落于可溶岩之上,干流库区可溶岩与非可溶岩并存,同时库盆内存在煤矿采空区,而支沟库区全为可溶岩,且在右岸存在低邻谷。可溶岩、低邻谷和煤矿采空区均可能导致水库渗漏,构成对水库成库的不利条件。通过分析,发现水库区存在邻谷渗漏及采空区渗漏的风险,同时坝址区存在绕坝渗漏的风险,均需进行防渗治理。结合水库地质条件,针对绕坝渗漏及支沟库区邻谷渗漏,提出在坝址和垭口处分别布置防渗帷幕进行治理;针对干流库区采空区渗漏,提出水平防渗+垂直防渗的综合方案进行治理。经过对坝址区及库区渗漏的工程防渗处理后,拟建水库可以成库。
After impoundment, the proposed reservoir will form the main stream reservoir area and the branch reservoir area.The dam foundation of the proposed reservoir is directly located on the soluble rocks. Soluble rocks and non-soluble rocks coexist in the main stream reservoir area, at the same time, there is a mined-out area of coal mine in the basin of the main stream reservoir area, while all over in the branch reservoir area only soluble rocks exist, and there is a low adjacent valley on the right bank of the branch reservoir area. Soluble rocks, low adjacent valley and mined-out area of coal mine may lead to reservoir leakage, which constitute unfavorable conditions for reservoir formation. Through analysis, it is found that there are risks of leakage of adjacent valley and mined-out area in the reservoir area, and there are risks of leakage around the dam site, which should be treated with anti-seepage. Combined with the reservoir geological conditions, aiming at the leakage around the dam and the leakage to adjacent valley in the branch reservoir area, the anti-seepage curtain was put forward to control the seepage at the dam site and the low pass respectively. Aiming at the mined-out area leakage in the main reservoir area, a comprehensive scheme of horizontal and vertical seepage prevention is put forward. After the seepage prevention treatment of dam site area and reservoir area, the proposed reservoir can be built successfully.
作者
张黔飞
Zhang Qianfei(Power China Guiyang Engineering Corporation Limited,Guiyang 550081,Guizhou;China Hydropower Consulting Group Guiyang Survey,Design and Research Institute Geotechnical Engineering Co.,Ltd.,Guiyang 550081,Guizhou)
出处
《陕西水利》
2021年第12期113-114,118,共3页
Shaanxi Water Resources
关键词
可溶岩
低邻谷
采空区
成库条件
水库渗漏
防渗处理
Soluble rock
low adjacent valley
mined-out area
reservoir conditions
reservoir leakage
anti-seepage treatment
