Corrugated Steel Web PC Composite Box Girder Bridge Lifecycle Environmental Impact Assessment

With the rapid development of China’s economy in recent years,the public transport infrastructure construction scale and the numbers are increasing year by year, especially roads and bridges projects,but with it comes the environmental issues are becoming more and more apparent. Effect of bridge engineering on the environment throughout the life cycle,in order to improve the environment caused by the construction of the bridge,it is necessary to bridge the environmental impact of the entire lifecycle of a comprehensive quantitative evaluation analysis. Domestic and foreign researchers of prestressed concrete bridge steel and concrete composite bridge have conducted environmental impact evaluation studies,and the combination of corrugated steel web PC box girder bridge of this study is small,as this type of bridge app promotion,sustainable development considerations bridge construction,therefore, it is necessary to carry out life cycle Assessment of the environmental impact of such a system for the bridge.Based on the theory of life cycle assessment and to human health,ecosystems and the quality of resources and energy conservation goals for the end of the three major damage assessment model,based on the Zhengzhou City Longhai Road Changzhuang main canal section corrugated steel web PC box girder bridge engineering background,this bridge for full life cycle analysis and environmental impact assessment, research results are as follows:(1) Construction of one pair of main bridge material,calculates energy environmental impact, in accordance with damage evaluation step, after the impact of the classification of substances,characterization,standardization and environmental impact-weighted eigenvalues and weight value unit material and energy.(2) For corrugated steel web PC composite box girder bridge, respectively, materials production and processing phase,construction phase,operation and maintenance phase and demolition phase to calculate environmental impact analysis, environmental impact at every stage of integrated load value, to achieve a full bridge life cycle environmental impact Assessment. Which focuses on the environmental impact of the construction phase comparison method and the use of stents push the method The results showed that incremental launching construction impact on the environment is comparatively small.(3) From the bridge the whole life cycle perspective,the environmental impact of contrast effect produced four stages,the results showed that:ecological impact human health and quality of major energy resources are derived from material production and processing stages;the bridge throughout the life cycle of human health the greatest impact,followed by damage to the resources and energy,the final impact on the ecological quality of the minimum.In this paper,corrugated steel web bridge full life cycle analysis and environmental impact assessment,while comparing the environmental impact of different construction process produces,adding the environmental impact factors in the choice of bridge construction methods,design and construction for the bridge program provides data comparison reference.