基于可变模糊识别模型的争岗堆积体稳定性评价

Stability Assessment of Zhenggang Landslide Deposit Based on Variable Fuzzy Recognition Model

堆积体边坡稳定性直接关系着工程建设的施工与运营安全.基于可变模糊集理论构建的可变模糊识别模型以及指标稳定性分级标准构建堆积体边坡稳定性评价体系;应用向量夹角余弦定理的概念定义指标权重可信度(剔除可信度低的权重向量),将所得指标权重带入堆积体稳定性评价体系中,实现堆积体边坡稳定性评价.考虑影响堆积体边坡稳定性的4个一级指标12个二级指标构建堆积体边坡评价指标稳定性分级标准.以争岗堆积体边坡为例,根据地质勘查情况及相关分析资料,应用可变模糊识别模型对其在暴雨工况下的稳定性进行评价.结果表明:争岗堆积体边坡的稳定性等级特征值为3.432,稳定性等级属于Ⅳ级,说明堆积体处于较不稳定的状态,评价结果与工程实际情况吻合.

The stability of deposit slope has a direct influence on the construction and operational safety of engineering.4first grade indices and 12second grade indices which affect the stability of deposit slope are taken into consideration to build the stability grading standards of deposit slope evaluating indicators.Variable fuzzy recognition model based on variable fuzzy sets theory and the stability grading standards of deposit slope evaluating indicators are used to build the stability assessment sets of deposit slope.Cosine theorem of vector angle is used to define the reliability of indicator weight(weight vectors with low reliability are rejected).Then indicator weights obtained are taken into the stability assessment sets of deposit slope to assess the stability of deposit slope.Zhenggang landslide deposit is taken as an example.According to the geological exploration and related analysis data,variable fuzzy recognition model is used to assess the stability under storm condition.The results show that:the stability grade eigenvalue of Zhenggang landslide deposit is 3.432;and its stability grade level isⅣ;it is shown that the deposit is in the unstable state;the results have a good agreement with the actual project.