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结合现行岩体参数研究方法,以西藏如美水电站为背景,通过分区分级裂隙岩体数值模拟等效计算方法,根据该地区边坡岩石的类型、强度及风化程度,裂隙结构面的发育特征和几何特征等因素,对下坝址区裂隙岩体进行了合理的区域划分和数值模拟计算,并与岩体质量评价系统GSI计算结果进行了对比分析,分析发现,两种方法得到的如美水电站下坝址区碎裂岩体参数基本一致,并从两种方法自身理论角度分析了其差异性,虽有差别,但都在允许范围之内,证明其结果是可靠可用的。另外,裂隙岩体参数分区分级法还可以简化数值模型,并能有效地降低运算量,提高了计算精度和速度。
Based on the existing research methods of rock mass parameters and the equivalent of the Rumuho Hydropower Station in Tibet, through the numerical simulation of the fractured rockmass in the district and its equivalent calculation method, according to the rock type, strength and degree of weathering in the area, Geological characteristics and other factors, the fractured rock mass at the lower dam site is reasonably divided into regions and numerical simulation calculations, and compared with the GSI calculation results of the rock mass quality evaluation system. It is found that the two methods, such as the Mei-Mei Hydropower Station The parameters of the fractured rock mass in the lower dam site are basically the same, and their differences are analyzed from the theoretical perspective of the two methods. Although they are different, they are all within the allowable range, and their results are proved to be reliable and available. In addition, the fractured rock mass parameter classification grading method can also simplify the numerical model, and can effectively reduce the computational load and improve the calculation accuracy and speed.