摘要
以博斯坦水库库区为研究对象,对库区工程地质条件进行了分析,在此基础上探讨了库区存在的主要工程地质问题,库区位于高山区"U"型谷中,河谷深切,沿河两岸发育的数条冲沟沟头高程远高于正常蓄水位,且组成库岸、库盘及坝后的主要岩性为花岗岩和变质岩,岩体新鲜、透水性弱,库区内无区域性和规模较大的断层通过,发育的小断层与河道多为大角度相交,且倾向上游,断层带内充填物较为密实,故水库蓄水后产生永久渗漏的可能性不大。分析了水库诱发地震的可能性,从岩性、构造、水文地质条件分析,水库蓄水后产生水库诱发地震的概率不大,即使诱发地震,地震烈度不会超过该区地震的基本烈度。为水库修建提供了详细的依据,并奠定了基础保障。
Taking Bostan Reservoir as the research object,this paper analyzed the engineering geological conditions of the reservoir area,and discussed the main engineering geological problems existing in the reservoir area.Bostan Reservoir is located in the"U"type Valley in high mountainous area,and the valley is deep.The elevation of several gully heads along both banks of the river is much higher than the normal water level.The main lithologies behind the reservoir bank,reservoir pan and dam are granite and metamorphic rocks.The rock mass is fresh and weak in water permeability.There are no regional and large-scale faults passing through the reservoir area.Most of the developed small faults intersect with the river at large angles and tend to upstream.The fillings in the fault zone are relatively dense.Therefore,there is little possibility of permanent leakage after reservoir impounding.The possibility of reservoir-induced earthquake is analyzed.From the analysis of lithology,structure and hydrogeological conditions,the probability of reservoir-induced earthquake after reservoir impounding is not large.Even if the induced earthquake,the seismic intensity will not exceed the basic intensity of the earthquake in this area.It provides detailed basis for reservoir construction and lays a foundation guarantee.
作者
张欣
令军帅
ZHANG Xin;LING Jun-shuai(Xinjiang Institute of Water&Hydropower Engineering Investigation,Design and Research,Xinjiang830091,China)
出处
《云南水力发电》
2021年第7期89-92,共4页
Yunnan Water Power
关键词
博斯坦水库
工程地质条件
工程地质评价
水库库区
Bostan Reservoir
engineering geological condition
engineering geological evaluation
reservoir area
作者简介
张欣(1984-),男,新疆乌鲁木齐人,工程师,主要从事水利水电工程地质勘察方面的工作。
