摘要
黄河上游某电站Ⅲ#结构体位于坝后左岸岸坡,发育位置较高,且呈两面临空状态。结构体的边界主要由几条较大的断层构成,目前已有变形迹象。在电站建成并正常运行后,由于结构体会受到泄流雨雾的影响,其稳定性状况如何将直接影响电站的正常运行。文章根据结构体的边界条件及变形破坏特征,分析了结构体的稳定状况及可能的失稳方式。根据工程地质类比法及室内试验给出了各软弱结构面的力学强度参数,利用极限平衡原理对结构体在各种工况下的稳定性进行了评价。结果表明,Ⅲ#结构体的稳定状况较好,只需对表部岩体进行处理就可达到长期稳定的效果。
The No3 geologic body locates in the left bank of a certain power station at the upper reach of the Yellow River. Its postion is very high and its both sides are free face. The boundarys of the geologic body are made of several rather large faults. The deformation phenomenon of the geologic body has alreadly appeared at the present time. After the built of the power station, the geologic body will receive the rainfog caused by the drawoff, the stability of the geologic body will directly affect the regular service of the power station. Based on the boundary conditions, deformation and failure character of the geologic body, the paper analyses the stability state and possible failure way. According to the Engineering Geology analogism and indoor test, gets the shear strength of the various feeble structural plane. Applying the limiting equilibrium principle, the paper evaluates the stability of the geologic body in varous conditions. The result indicates that the stability state of the No3 geologic body is rather good, and it can be kept the longterm stabilization only by the treatment of the surface loose rock mass.
出处
《中国地质灾害与防治学报》
CSCD
2003年第2期72-75,86,共5页
The Chinese Journal of Geological Hazard and Control
