基于D-S证据理论—正态隶属度的岩土边坡稳定性评价

针对岩土边坡稳定性评价具有模糊性和不确定性且各评价指标存在矛盾冲突性的特点，提出了基于D-S证据理论的岩土边坡稳定性综合评价方法。首先建立识别框架，选取评价指标，运用正态隶属函数确定各等级对应的质量函数。然后基于各等级质量函数间的距离，综合考虑各指标各等级之间的相互影响程度，确定指标权重。最后运用D-S组合规则，得出岩土边坡稳定性等级。将D-S证据理论评价模型运用到广州某稀土矿山工作场地，并将该方法与可拓法在质量函数与关联度、权重确定和评价结果等方面进行比较，结果表明D-S证据理论评价模型相对合理，所得结果精度较高并且与工程实际相吻合。

Stability Evaluation of Rock-soil Slope Based on D-S Evidence Theory and Normal Degree of Membership

In order to effectively solve the problems of vagueness and uncertainty，and the conflict between the evaluation indexes existing in the process of rock-soil stability evaluation，a new approach of comprehensive evaluation on rock-soil stability was proposed based on D-S theory of evidence.Firstly，the recognition framework was established，the evaluation indexes were selected，and the basic probability distribution of levels was determined by using the Gaussian membership function.Secondly，the index weight was determined based on the range of basic probability distribution and the mutual influence between indexes and grades.Finally，the stability of rock-soil slope was determined by using the combination rules of D-S evidence theory.Through comparison with the extension method in the basic probability distribution and relevancy of indexes，determination of weight and the revaluation result，D-S evidence theory was used in the workplace of a rare earth mine in Guangzhou.And the results show that the evaluation model of D-S evidence theory is more suitable and more practical，and with higher accuracy.