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目前各种岩体质量评价方法考虑的因素及其评分标准不统一,导致岩体质量评价存在一定的局限性。通过采用灰色系统理论改进传统TOPSIS法在多指标综合评价中的不足,提出一种基于组合赋权和灰色逼近理想解排序(TOPSIS)的岩体质量评价方法。根据岩石性质选取8项评价指标,建立了符合工程实际的评价指标体系,并依据信息熵原理对各项评价指标进行主客观组合赋权,克服了传统单一赋权方法的缺陷,保证了指标权重的客观性。最后探讨了提出方法在水布垭地下厂房围岩质量评价中的应用。结果表明:本文提出方法相比于可拓物元法、模糊可变集法和分形插值评价方法,评价结果是准确可靠的,操作简单,计算精度高,较好解决了岩体工程中的实际问题,亦可推广应用于其他水利工程的评价中。
At present, the factors considered by various rock mass quality evaluation methods and their evaluation standards are not unified, which leads to the limitation of rock mass quality evaluation. By using gray system theory to improve the deficiencies of traditional TOPSIS method in multi-index comprehensive evaluation, a rock mass quality assessment method based on combination weighting and gray approximation ideal solution ordering (TOPSIS) is proposed. According to the properties of rock, eight evaluation indexes are selected and an evaluation index system is established which is in line with engineering practice. Based on entropy principle, each evaluation index is subjectively and objectively combined to overcome the shortcomings of traditional single weighting method, Objectivity. Finally, the application of the proposed method in the evaluation of surrounding rock quality of the Shuibuya underground powerhouse is discussed. The results show that the proposed method is more accurate and reliable than the extrinsic multi-element method, the fuzzy variable set method and the fractal interpolation method, with simple operation and high computational accuracy, which solves the problems in rock mass engineering The problem can also be applied to the evaluation of other water conservancy projects.