坝基层状岩体质量评价探讨

以西南某电站坝基岩体质量分级的工程实践为基础 ，结合目前国内外广泛应用的岩体质量分级方法，针对性地论述了影响层状岩体质量评价的 一些主要因素如原生层面、软弱夹层及岩层倾角等，分析了层状岩体质量评价过程中常遇到 的各向异性问题、评价指标的跳跃性问题及层状结构对岩体质量评价结果的影响问题等，并 对这些问题进行了较为细致的剖析，提出了层状岩体质量评价应注意的一些问题。

Discussion for Quality Appraisal of Layered Rock-mass

On the basis of the engineering practice of the rock-mass quality classification of certain power station in southwest China, and in combination with the universal methods used at home and abroad, some major factors influencing rock-mass quality of layered rock-mass such as original bedding, soft interlayer and dip angle of the rock stratum are expounded. The problems occurred in the process of appraisement, such as the aeolotropism of the layered rock-mass, spring feature of evaluating indicator and the influence of the layered structure on evaluation results etc., are analyzed. Some problems needed to be noted on layered rock-mass quality appraisal are put forwards.