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坝基岩体质量评价具有模糊性和随机性等不确定性特点。基于云模型理论探讨了坝基岩体质量评价的一种新模型,进一步丰富了坝基岩体质量评价中的不确定性分析。该模型依据坝基岩体质量评价指标分级标准,计算各评价指标隶属于不同质量级别的云数字特征,并结合评价指标权重和正向正态云算法,得到实测样本岩体的综合确定度,以最终确定坝体基岩质量级别。该新模型与可拓理论法的对比表明,该模型应用于坝基岩体质量评价是有效可行的,且计算过程简便,结果可靠,为其他类似问题的不确定性分析提供了新的研究思路。
The quality evaluation of dam foundation rock mass is characterized by uncertainties such as fuzziness and randomness. Based on the cloud model theory, a new model of rock mass quality evaluation is discussed, which further enriches the uncertainty analysis of rock mass quality evaluation. Based on the grading criteria of rock mass quality evaluation index of dam foundation, the model calculates the cloud digital characteristics of each evaluation index under different quality levels. Combined with the evaluation index weight and the forward normal cloud algorithm, the comprehensive determination degree of the measured sample rock mass is obtained. Finally, Determine the bedrock quality level of the dam. The comparison between the new model and extension theory shows that the model is effective and feasible for rock mass quality evaluation of dam foundation. The calculation process is simple and the result is reliable, which provides a new research idea for the uncertainty analysis of other similar problems.