下坂地水利枢纽工程主要工程地质问题及对策

新疆下坂地水利枢纽工程区地质构造复杂,坝区地震基本烈度8度,坝址覆盖层厚达约150m,库区两岸山体雄厚,大坝两岸的边坡高陡,岩石破碎稳定性差,工程地质中的深厚覆盖层、高边坡、高应力岩爆及有害气体、砂层液化等多种疑难问题都得到反映。因此解决好工程地质是搞好下坂地水利枢纽工程建设的关键所在。为此,简要介绍该工程的主要工程地质问题及对策。

Key geological problem and countermeasure for Xiabandi Water Control Project

The geological structure within the area of Xiabandi Water Control Project is complicated with the seismic intensity of 8 degree and the thickness of the coverage of about 150 m at the dam site. The mountains on both the banks of the reservoir are rugged with steep slopes at the dam site and the rock is quite broken with poor stability; for which many problems of engineering geology such as deep coverage, high side slope, rock-burst with high stress and harmful gas, liquefaction of sand-layer etc. exist therein. Therefore, the key problem to construct the project well is how to solve all the problems concerned above. Consequently, the engineering geological problems and the relevant countermeasures are briefly described herein.