Carbon Emission Calculation And Carbon Peaking Prediction Of Qin-tang Expressway Based On LCA

Low-carbon expressway is an important part of green transportation,and the main goal of highway transportation development is to achieve the "Carbon Peaking" and the "Carbon Neutrality" of the highway life cycle.This paper studies and analyzes the key technology of carbon emission accounting and carbon peak prediction on the expressway based on the Qin-Tang expressway construction and the whole life cycle theory:(1)The basic concept and theoretical framework of carbon emission assessment of highway life cycle are applied to the calculation of highway carbon emission and the study of energy conservation and emission reduction based on the LCA model(life cycle theoretical model).(2)The carbon emissions of the main projects,construction materials and construction machinery in different stages are calculated based on the four stages of the whole life cycle of Qin-tang Expressway.The result is researched and analyzed: The main carbon emission in the physical and chemical stage of expressway is concentrated in the material production and processing stage,the carbon emission of bridge engineering is the highest during in the stage of material production and processing;The carbon emission of dynamic tamper is the largest in subgrade engineering,pavement engineering mixing equipment has the most carbon emissions,the cyclotron rig produces the most carbon emission in bridge engineering,bulldozers produce the most carbon emissions of any temporary project during in the construction stage;Carbon emissions in operation phase mainly come from infrastructure revolving;The levelling of the site produced more carbon emissions,while the transport of materials produced relatively less carbon emissions during in the demolition stage.According to the results,corresponding emission reduction measures are proposed to reduce the carbon emissions in the phase of highway materialization,construction,operation and demolition.(3)A set of low carbon highway index system suitable for Qin-tang Expressway is constructed by combining the LCA model and DPSIR model based on the calculation and analysis results of carbon emissions in each stage of the life cycle of Qin-tang Expressway,Taking the environmental impact of the driving force criterion layer,the utilization rate of energy-saving measures during the operation period of the state criterion layer,the utilization rate of high-performance concrete and the utilization rate of warm mixed asphalt pavement of the influence criterion layer as the starting point after calculating weight of the system,the Benchmark Situation and Peaking Situation of the expressway are set according to the carbon reduction measures in the actual project.The carbon peak year of Qin-tang expressway is predicted to be 2034,and the corresponding energy-saving and carbon reduction measures are proposed to ensure maximum carbon emissions by 2030.