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Ningxia University (2022)

Study on the Influence of Highway Construction on Carbon Emission and Dune Movement in Desert Area


Titre : Study on the Influence of Highway Construction on Carbon Emission and Dune Movement in Desert Area

Auteur : 胡志勇

Grade : Master 2022

Université : Ningxia University

Résumé partiel
With the implementation of the "Double Carbon Strategy",the realization of the double carbon goal in the transportation sector focuses on how to promote the low carbon and green transformation of transportation to achieve sustainable development of the industry.In addition,with the further development of the national western development strategy,the highway infrastructure in desert areas has been developed rapidly and the desert ecosystem has been challenged,but the impact of highway construction on the desert ecosystem has been left blank.Therefore,this research studied the impact of desert highway construction on the corridor environment from the perspectives of "carbon emission"and "dune movement impact".Firstly,this paper takes the 17.2 km section of Ningxia Uma Expressway(Qingtongxia-Zhongwei section)through the desert area as the relying project,and optimizes and improves the model of energy consumption and carbon emission from "road construction materials","material transportation" and"mechanical equipment" in the road construction stage with the help of factor decomposition method,global warming potential,inventory analysis and other theories."The total carbon emission is calculated based on the relying project,and the error is 10.42%and 13.36%,when compared with the existing relatively mature carbon emission calculation platform during the road construction period,which indicates that the research results of this paper are reliable.The research in this paper compares the construction carbon emissions of road projects in desert and non-desert regions respectively from a macroscopic perspective,and takes the ratio of carbon emissions of 1 functional unit desert and non-desert roads as an indicator,and finds that in terms of road construction materials,steel sections and steel bars produce higher carbon emissions in non-desert sections than in desert sections ;in terms of mechanical equipment,diesel and coal contribute more to carbon emissions in desert sections,and gasoline and electricity in non-desert sections In terms of micro-comparison analysis,during the road construction stage,"material transportation" has the highest contribution to total energy consumption,accounting for 47.60%,while "road construction materials" and "machinery and equipment" are at the same level.The main source of carbon emission of highway is "road construction materials",and its production brings the highest percentage of Carbon emission,which is 45.46%,while the Carbon emission of "material transportation" and "machinery and equipment" is 45.46%."Finally,combined with the characteristics of the dependent projects,this paper proposes the practice of pavement structure and road base filling methods based on carbon reduction,and finds that under the condition of ensuring the same performance of pavement structure,the use of graded gravel(flexible)base pavement can effectively reduce energy consumption and carbon emissions,reaching 6.03%and 9.17%respectively.The use of wind-cum-sand as roadbed filling material has a significant impact on energy saving and carbon reduction while solving the lack of desert materials,and compared with ordinary roads,the use of wind-cum-sand as filling material for desert roads can reduce energy consumption and carbon emission by 20.63%and 15.08%.

Mots clés : dual carbon strategy ;desert highway ;carbon emission ;tilt photography ;dune movement ;

Présentation (CNKI)

Page publiée le 9 mai 2023