陈忠源, 戴自航. 2020.水库边坡稳定性评价的改进云模型[J].工程地质学报, 28(3): 619-625. doi: 10.13544/j.cnki.jeg.2018-366.
    引用本文: 陈忠源, 戴自航. 2020.水库边坡稳定性评价的改进云模型[J].工程地质学报, 28(3): 619-625. doi: 10.13544/j.cnki.jeg.2018-366.
    Chen Zhongyuan, Dai Zihang. 2020. Improved cloud model for stability evaluation of reservoir slopes[J]. Journal of Engineering Geology, 28(3): 619- 625. doi: 10.13544/j.cnki.jeg.2018-366.
    Citation: Chen Zhongyuan, Dai Zihang. 2020. Improved cloud model for stability evaluation of reservoir slopes[J]. Journal of Engineering Geology, 28(3): 619- 625. doi: 10.13544/j.cnki.jeg.2018-366.

    水库边坡稳定性评价的改进云模型

    IMPROVED CLOUD MODEL FOR STABILITY EVALUATION OF RESERVOIR SLOPES

    • 摘要: 水库边坡的稳定性受诸多因素的影响,以致其准确评价仍存在一定的困难。为克服传统的正态云模型方法在实际应用中存在的云模型特征值取值不统一以及使用期望隶属度而非实际隶属度两个问题,提出了改进型正态云模型,并在MATLAB软件平台上开发了便于模型应用的程序。选取影响水库边坡稳定性的12个主要因素作为评价指标,应用程序生成各评价指标在各稳定性等级的综合隶属度云模型,接着使用改进的熵权层次分析法确定各评价指标的相应权重,最后将平均综合隶属度最高值所在的级别确定为边坡的稳定性等级。将该方法应用于34个水电边坡工程稳定性评价实例,并将结果与现行国家规范推荐的CSMR法及这些边坡的实际状态进行了比对。结果表明该方法的准确度比CSMR法高,具有较好的可靠性和实用性,也可供公路、铁路或建筑等其他岩质边坡在进行稳定性评价时参考。

       

      Abstract: The stability of reservoir slope is affected by various factors so that it is still difficult to accurately evaluate their stability. This paper overcomes the two existing problems:(1)the eigenvalues of cloud model are not unified and (2)the expected rather than actual membership degrees are used as the traditional normal cloud model method is actually applied. It proposes an improved normal cloud model. A program for model application is developed on MATLAB software platform. Twelve factors that mainly affect the reservoir slope stability are selected as the evaluation indexes. The comprehensive cloud model of each stability level in regard to every evaluation index is generated from the cloud generator. Meanwhile,the weight of every evaluation index are obtained by the analytic hierarchy process on the basis of improved entropy weight. The maximum average membership degree is determined as the stability grade of a slope. The proposed method is employed in the stability evaluation of 34 engineering examples of reservoir slopes. And the evaluation results are compared with the ones by the CSMR method recommended by the current national code as well as the actual state of these slopes. It shows that the accuracy of this method is higher than that of CSMR method,and it has good reliability and practicability. The method can also be referred when evaluating the stability of other rock slopes such as road,railway or building slopes.

       

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