The Study On Railway Ecological Environment Evaluation Index

The construction of the railway brings the fast development of the economics and the pressure to the ecological environment. In order to reduce or avoid the occurrence of ecological disasters due to railway construction, it is necessary to study technology for the comprehensive evaluation of the impact of railways on ecological environment.Based on the relevant information of home and abroad, according to the characteristics of the railway, the paper analyses the relation between the ecological environment and the railway in its building process, searches for the reasons of the negative impact which railways may do to the ecological environment, and applies the thoughtful thread of the pressure-state-response framework model for reference, sets up the indicator set of the railway ecological assessment.FAHP (Fuzzy Analytic Hierarchy Process) is presented to evaluate the impact of railway on ecological environment to establish the hierarchy model of the comprehensive railway ecological evaluation system, and to present the evaluation indexes for every class. By constructing the judging matrix and calculating every index's weight, the functions have been built for the degree of subordination of the bottom indexes, and the evaluation thresholds. Having the indexes none-dimensionally, educe the degree of subordination of every index, and get the results of the comprehensive evaluation.The comprehensive degree of the impact of Yong-Tai-Wen Railway on ecological environment is evaluated, and every evaluation index is analyzed.