铁路防沙工程方案的模糊综合评价

Fuzzy comprehensive evaluation of railway sand control engineering scheme

风沙灾害是威胁沙漠铁路安全运营的主要因素,科学合理的防沙工程可减小风沙危害和保护生态环境,但目前关于铁路防沙工程的评价方法还不多见。为了对防沙工程方案进行科学合理地评价,在分析铁路防沙工程影响因素的基础上,将其划分为工程设计因素和地理环境因素,利用提取的主影响因子建立铁路防沙工程模糊综合评价模型,将指数标度法与区间标度法结合,通过改进的层次分析法计算各影响因子的权重。方案评价时先确定单个评判对象对评语集的隶属程度建立单因素评判矩阵,再通过模糊综合评判矩阵计算评价值来实现方案评价。以敦格铁路某段的防沙工程为例,进行了实例验证。结果表明:该方法可适用于铁路防沙工程的方案评价,评价结果与工程实际情况基本吻合,具有一定的合理性和工程应用价值。

Wind sand disaster is the main factor threatening the safe operation of desert railway.Sand control engineering designed scientifically and reasonably can reduce the wind-sand damage and protect the ecological environment.But at present,there are few evaluation methods of the sand control engineering.In order to make the scheme evaluation of sand control engineering more practical and scientific,on the basis of analyzing the influencing factors of engineering design,the factors are divided into engineering factors and geographical environment factors.The fuzzy evaluation model of railway sand control engineering is established by using the main influence factors that have been extracted.Combining the index scale method with the interval scale method,the weight of every factor is calculated by the improved analytic hierarchy process.The membership of a single evaluation object to the evaluation set is determined first,and the single factor evaluation matrix is established.Then,the evaluation value is calculated by fuzzy comprehensive evaluation matrix to realize the scheme evaluation.Taking a sand control project of the Dunhuang-Golmud railway as an example,the above method is verified by a case study.The results show that this method can be applied to the scheme evaluation of railway sand control engineering,and the evaluation results are basically consistent with the actual situation of the engineering,which has certain rationality and engineering application value.