公路土质路基边坡坡面冲刷稳定性的模糊综合评价

在综合分析公路土质路基边坡坡面冲刷稳定性影响因素的基础上,提出了公路土质路基边坡坡面冲刷稳定性模糊综合评价系统方法。首先选取18项评价指标,建立这些评价指标的量化方法。对于连续型指标,可采用4类共16种隶属函数描述方法;对于离散型指标,可采用经验赋值方法。然后采用专家打分法确定评价指标的权重,提出模糊综合评价的模型及两种评价原则,最后通过应用实例分析,验证了模糊综合评价方法在评价公路土质路基边坡坡面冲刷稳定性方面的可行性和有效性。

Fuzzy evaluation method of scouring stability on soil subgrade slope

Based on a synthetical study on the influence factors of scouring stability, the fuzzy evaluation method of scouring stability on soil subgrade slope is put forward. First, the authors select 18 judgment indexes, and establish a numerical method on them in which 4 types subordinate functions with 16 mathematical expressions are set up to describe the continuous indexes, and experiment methods are used to deal with dispersion indexes. Then, the authors adopt expert-giving-marks method to define the weight coefficients of these judgment indexes. A fuzzy evaluation model is set up and 2 types of evaluation principles are proposed. Finally, the engineering example is analyzed by the method. On the results, the correctness and effectiveness of fuzzy evaluation method of scouring stability on soil subgrade slope are proved.