Environmental Impact Assessment For Arterial Highways Widening

With the rapid development of China’s national economy,the pace of highway construction is becoming faster and faster.Along with the high-speed development of the highway,the pollution of the highway and the influence of the highway to the surrounding environment have also been highlighted.Therefore,it is necessary to evaluate the environmental impact of the roads that will be built or built.The research on environmental impact assessment of highway system mainly concentrated in the new highway construction project,especially the application in highway reconstruction project in the ordinary national and provincial trunk highways are few,in view of the environmental impact assessment of Highway Widening Engineering research.This paper first analyzes the main trunk road widening on the environmental impact of the project,the main factors determining the environmental impact assessment,and the theory and method of comprehensive evaluation of existing environmental impact analysis,level of analysis is selected as main highway environmental impact assessment.According to the EIA specification and the engineering characteristics of highway widening construction projects,we initially select the evaluation index of environmental impact and determine the index system and evaluation standard of EIA.The analytic hierarchy process(AHP)is used to determine the weight of each evaluation index,and the environmental impact assessment model of the trunk road widening project is established.In order to make the weight determination more reasonable,we select several experts in the environmental field to compare the indicators,and comprehensively analyze the shortcomings of weakening the subjectivity of AHP,so as to improve the scientificity of the evaluation results.The evaluation model of this paper is used to evaluate the environmental impact of G205 widening project.The evaluation results show that the environmental impact of this project is good,indicating that the construction process and operation of the project have little influence on the environment after operation,and the project is feasible.The example shows that the model is practical and effective.A detailed analysis of the evaluation results is made to sum up the degree of impact on the environment after the construction process and operation of the project,and to give suggestions for improvement based on the specific circumstances of the project.The evaluation from the perspective of environmental impact analysis of highway widening reasonable of construction project environmental impact of highway widening of highway widening layer analysis project environmental impact evaluation index system,in-depth understanding of the importance of each index layer and the internal relations,and provide scientific basis for optimization design,construction management and environmental protection management department.