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岩体质量评价中定性的方法很多,但缺少定量的评价方法。本文介绍了分形的基本概念以及工程岩体的分形特性。通过对野外结构面调查结果的分析统计,采用结构面网络模拟技术,分析了分形维数的计算方法,并给出了用分形维数来评价路堑边坡岩体质量的实例。所得结果与经验公式法所得结果基本一致,认为该方法可以作为定量评价岩体质量的方法。但是该方法现场计算存在一定困难,有待进一步简化研究。
There are many qualitative methods in rock mass quality assessment, but there is no quantitative evaluation method. This paper introduces the basic concepts of fractal and the fractal characteristics of engineering rock mass. Based on the analysis and statistics of the investigation results of the structural plane in the open field, the calculation method of the fractal dimension is analyzed by using the structural surface network simulation technique. The fractal dimension is given to evaluate the rock mass quality of the cutting slope. The results obtained are basically the same as those obtained by empirical formula method, and the method can be used as a method for quantitative evaluation of rock mass quality. However, there are some difficulties in field calculation of this method, which needs to be further simplified.