基于LCA的改扩建公路碳排放计算与分析  

Calculation and Analysis of Carbon Emissions for Road Expansion and Improvement Based on Life Cycle Assessment(LCA)

作　　者：彭雄慧 章胜平[1] 肖镇江 宋志刚[1] PENG Xionghui;ZHANG Shengping;XIAO Zhenjiang;SONG Zhigang(Kunming University of Science and Technology,Kunming,Yunnan 650504,China)

机构地区：[1]昆明理工大学,云南昆明650504

出　　处：《公路工程》2024年第6期151-157,共7页Highway Engineering

基　　金：云南省重点领域科技计划项目(202003AC100001)。

摘　　要：为对公路基础设施的能耗及碳排放进行量化评估,在现有研究的基础上,首先总结确定了资源性改变、人工活动、材料消耗和机械使用作为碳排放源的四大主体,提出了一种基于碳排放源分组的混合生命周期碳排放计算法;其次,采用LCA理论,基于实际案例构建碳排放计算模型进行碳排放分析;最后,对比分析各组分碳排放量,确定碳排放的主要影响因素。研究结果表明:可溯源组碳排放占总量的81.93%,其中,材料消耗占比最大为67.26%,主要以水泥和钢材为主,以此提出注重设计优化、减少建筑材料的用量或增加绿色建材的使用降碳减排的研究重点;人工和机械消耗对碳排放贡献不大,机械施工柴油比重占67.9%,表明提高工人劳动效率、促进清洁能源使用是降低建设施工阶段碳排放的合理化途径;不可溯源组占17.95%,其排放量也不容忽视,并提供减少土地资源的占用并强化管理的节能减排新途径,以期为改扩建公路建设节能减排提供理论支持。In order to quantitatively assess the energy consumption and carbon emissions of highway infrastructure,this paper first summarizes and confirms the four major sources of carbon emissions,including resource changes,manual activities,material consumption and machinery use based on existing research,and proposes a mixed life cycle carbon emission calculation method based on carbon emission source grouping is proposed;secondly,the LCA theory is used to construct a carbon emission calculation model based on actual cases for carbon emission analysis;finally,the carbon emissions of each component are comparatively analyzed to determine the carbon emissions main influencing factors.The research results show that traceable group carbon emissions account for 81.93%of the total,of which material consumption accounts for the largest 67.26%,mainly cement and steel.Therefore,this study suggests focusing on design optimization,reducing the amount of building materials,or increasing the use of green building materials as the research priority for carbon emissions reduction and mitigation;labor and mechanical consumption contribute little to carbon emissions,and diesel for mechanical construction accounts for 67.9%,indicating that improving worker labor efficiency and promoting the use of clean energy are rational ways to reduce carbon emissions during the construction phase;the non-traceable group accounts for 17.95%,and its emissions cannot be ignored.It provides a new way of energy conservation and emission reduction to reduce the occupation of land resources and strengthen management,in order to provide theoretical support for energy conservation and emission reduction in highway reconstruction and expansion.

关 键 词：道路工程 节能减排 混合生命周期评价法 碳排放核算 

分 类 号：X734[环境科学与工程—环境工程]