Karst Seepage Analysis on left River Bend in the head area of GUANDI Hydropower Station reservoir
PENG Shixiong1，2，CHEN Weidong1，2，XIAO Qiang1，2
(1. PowerChina Chengdu Engineering Corporation，Chengdu，Sichuan 610072，China；2.High Concrete Dam Affiliation of National Hydropower Technology Research and Development Center，Chengdu，Sichuan 610072，China)
Abstract：Since karst seepage channels may be formed by the thorough karst limestone formations，which existing on the flimsy left river bend of head area of Guandi reservoir，farther research on these formations should be carried out. The difficulties in the process of research are the development degree and the forming process mechanism of the karst formation，which directly related to the treatment of antiseepage project and the safety issues during project operation. After adopting methods of macro-geological survey，exploration，groundwater level observation，and water chemistry testing，this paper basically ascertained the geological background and features of karst development，and the karst hydrogeological conditions etc. It emphatically researched the forming process mechanism of karst，adopting seepage field numerical simulation analysis combined with engineering experience，considering reservoir leakage is less likely to happen in the future. It proposed that anti-seepage project should depend on the long-term groundwater monitoring. The groundwater level monitoring after impoundment verified pre-analysis. The reservoir did not produce leakage along the flimsy river bend area，therefore，the anti-seepage project need not to be carried out，saving billions of project investment with significant economic benefits. The case in this paper can provide reference for similar major reservoir construction. The research methods and mentality can also be instructive.
彭仕雄1，2，陈卫东1，2，肖 强1，2. 官地电站库首左岸河湾地块岩溶渗漏分析[J]. 岩石力学与工程学报, 2015, 34(S2): 4030-4037.
PENG Shixiong1，2，CHEN Weidong1，2，XIAO Qiang1，2. Karst Seepage Analysis on left River Bend in the head area of GUANDI Hydropower Station reservoir. , 2015, 34(S2): 4030-4037.
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2015, Vol. 34 
