基于未确知测度的边坡稳定性评价研究

基于未确知测度理论,建立边坡稳定性的未确知评价模型。针对边坡稳定性评价中许多不确定性影响因素,从岩体的工程地质、地形地貌、水文气象等特征出发,选用7个指标作为边坡稳定性评价的指标,建立各评价指标未确知测度函数;根据信息熵理论计算得各评价指标的权重,并依照置信度识别准则进行稳定性评价;将建立的模型对某待评价边坡进行了实际应用,并与可拓理论、模糊评判结果进行了比较分析。结果表明:该模型评价结果与可拓理论、模糊评判结果一致,能够比较客观地反映该边坡稳定性的状况,且方法科学合理、意义明确,为边坡的稳定性评价提供了一种新思路。

RESEARCH ON EVALUATION OF SLOPE STABILITY BASED ON UNASCERTAINED MEASURE

Based on unascertained measure theory, the unascertained evaluation model of slope stability was established. For a lot of uncertainties factors in the assessment of slope stability,from the rock geology,topography,hydrology and meteorology and other characteristics,seven indicators were selected as assessment indicators of slope stability. Unascertained measure function for each evaluation index was established; weight of each index was calculated according to information entropy. And stability evaluation was done in accordance with credible identification; the established model was applied to some slope,whose results were compared with the extension theory,fuzzy evaluation results. The results show that the model evaluation results are consistent with the extension theory and fuzzy evaluation results,which can reflect objectively the situation of the slope stability,and the method is reasonable,the meaning is clear,thus providing new ideas for the slope stability evaluation.