基于熵权物元理论的山区公路路侧安全性评价研究

摘要

In order to accurately evaluate the safety of roadside and minimize the interference of human factors,the safety evaluation index system of highway road side is established from the aspects of road shape,road cross section,traffic characteristics and traffic engineering facilities.At the same time,a security evaluation model based on entropy weight matter element extension theory is established.The weight of the evaluation index is calculated by using the entropy method to reflect the original information of most of the indicators,and the safety of the roadside is evaluated by the Matter-element extension model.In this paper,4 bends of provincial road in Guizhou Province are taken as examples.The evaluation results are basically consistent with the situation of the field by calculating the relative close degree of the bends and the ideal solution and the characteristic value of the level variable.It is demonstrated that the evaluation model has some reference value for roadside safety evaluation.%为准确评价路侧安全性,尽量减少人为因素的干扰,从道路线形、道路横断面、交通特性、交通工程设施等方面建立公路路侧安全性评价指标体系,同时建立基于熵权物元可拓理论的安全性评价模型.采用熵权法计算评价指标权重,以反映大部分指标的原始信息,并结合物元可拓模型对路侧安全性进行评价.以贵州省某省道4处弯道为例,通过计算各弯道与理想解的相对贴近度和级别变量特征值对其进行评价,其评价结果与现场情况基本一致.由此可知,该评价模型对于路侧安全性评价具有一定的参考价值.