Study On Carbon Emission Calculation And Prediction Of Guangxi Expressway Construction Period

As a basic public transportation industry,highways consume a lot of energy and generate a lot of carbon emissions while promoting economic growth.Nowadays,under the background of "double carbon",during the construction of expressway projects,the impact on the environment should be fully considered,and carbon emissions should be scientifically and reasonably reduced.Therefore,from the perspective of expressway construction units,this paper calculates and forecasts carbon emissions during expressway construction,and proposes countermeasures for energy conservation and emission reduction.This paper analyzes the status quo of expressway carbon emission calculation and prediction.On this basis,based on the LCA life cycle theory,the carbon emission process during the construction period of the expressway is divided into four parts: the carbon emission in the material production stage,the material transportation stage and the construction stage,and the carbon sink reduced by land acquisition and demolition.The expressway project is divided into nine unit projects.Then,a database of carbon emission factors during the construction period of Guangxi expressway was established,and the calculation model of carbon emission during the expressway construction period was constructed by using the emission coefficient method.Based on the carbon emission calculation model,calculate the carbon emission data of 25 completed expressways in Guangxi during the construction period,and use the expert survey method to select important and representative carbon emission indicators,and use BP neural network and random forest to measure carbon emissions.Based on the data,two prediction models for carbon emissions during the construction period of expressways in Guangxi were established.Through the actual case A highway project,the carbon emission calculation model is used to calculate the carbon emission,and the actual carbon emission and the carbon emission of the prediction model are compared and analyzed.The results show that the neural network prediction model has better effect and can predict quickly and accurately.Carbon emissions during highway construction.The carbon emission calculation results were analyzed,and it was concluded that the carbon emission in the material production stage was the highest,accounting for 85.92% of the total carbon emission.According to the research results and the actual situation of the project,targeted emission reduction countermeasures are put forward for the four stages of the expressway construction period.This paper is a preliminary exploration of the research on the calculation and prediction of carbon emissions during the construction period of expressways.It is helpful to explore suitable methods for calculating and predicting carbon emissions during the construction period of expressways in Guangxi,implement energy conservation and emission reduction measures for the highway industry,and further carry out carbon emission evaluation during the construction period.Management and research are important.