摘要
在“双碳”战略背景下,本研究针对铁路工程建设阶段碳排放量化管控方法缺失问题,提出基于施工图与工程预算为碳核算活动水平数据来源的碳预算方法,构建“目标设定-五级预警-减排路径优化-动态评估”的控碳方法体系。以西渝高铁何家湾大桥为实证对象,核算得到物化阶段总碳预算23895tCO_(2)其中材料隐含碳排放占比77.4%(主导因素),能源间接排放15.6%,直接排放6.3%,运输排放0.7%。通过帕累托分析识别出混凝土(C35/C50)、钢筋及混凝土搅拌输送车、汽车起重机等6种关键排放源(累计贡献率>80%),进而以0#-2#墩台为例,建立其碳排放预警机制,计算碳效指标P,结果表明0#-2#墩台的混凝土(P=0.93)和钢筋(P=0.86)碳预警等级分别为合格与良好,而电力(P=0.98)与柴油(P=1.02)分别处于一般与超标状态。据此提出靶向调控策略,即对混凝土搅拌输送车、汽车起重机等重大排放源实施精细化能效管理,如优化设备调度、减少设备空转时间、以电代油等措施降低施工碳排放量。
Under the background of the"dual carbon"strategy,this study addresses the lack of carbon emission quantification and management methods during the construction phase of railway projects.This paper proposes a carbon budgeting method that takes construction drawings and project budgets as the data sources for carbon accounting activity levels,and innovatively constructs a carbon control method system featuring"target setting-fivelevel early warning-emission reduction path optimization-dynamic evaluation".Taking the Hejiawan Bridge of the Xiyue High-Speed Railway as an empirical case,the total carbon budget during the materialization phase is calculated to be 23,895 tCO 2.Among this,embodied carbon emissions from materials account for 77.4%(the dominant factor),indirect energy emissions for 15.6%,direct emissions for 6.3%,and transportation emissions for 0.7%.Through Pareto analysis,six key emission sources are identified,including concrete(C35/C50),steel bars,concrete mixing and conveying trucks,and truck cranes(with a cumulative contribution rate>80%).Furthermore,taking Piers O#−2#as an example,a carbon emission early warning mechanism is established,and the carbon efficiency index P is calculated.The results show that the carbon early warning levels for concrete(P=0.93)and steel bars(P=0.86)of Piers O#−2#are"qualified"and"good"respectively,while those for electricity(P=0.98)and diesel oil(P=1.02)are"average"and"below the standard"respectively.Based on this,targeted regulation strategies are proposed,namely implementing refined energy efficiency management for major emission sources such as concrete mixing and conveying trucks and truck cranes.Measures include optimizing equipment scheduling,reducing equipment idling time,and replacing oil with electricity to reduce construction carbon emissions.
作者
全斐
王君楼
王先毫
吴健春
赵鹏
朱丽
Quan Fei;Wang Junlou;Wang Xianhao;Wu Jianchun;Zhao Peng;Zhu Li(Science and Technology Innovation and Digitalization Department,China Railway 10th Bureau Group Co.,Ltd.,Shandong,Jinan 250101,China;Dazhou Command Center,Xikun Co.,Ltd.of Beijing-Kunming Highspeed Railway,Chongqing 400020,China;School of Municipal and Environmental Engineering,Shandong Jianzhu University,Shandong,Jinan 250101,China)
出处
《铁道技术标准(中英文)》
2025年第11期17-25,共9页
Railway Technical Standard(Chinese & English)
基金
山东省建筑与交通双碳创新创业共同体重大科技研发项目(STGTT0201202406)。
关键词
铁路工程
碳预算
碳排放预警
控碳减碳路径
碳效指标
应用
railway engineering
carbon budget
carbon emission early warning
paths for carbon control and reduction
carbon efficiency indicator
application
