【摘要】 针对城市轨道交通快速发展引发的能源消耗和温室气体排放问题，提出一种基于预算定额的轨道交通碳排放核算方法，通过整合碳排放强度和经济强度指标，构建“车站-区间-线路”多层级碳排放分析体系。以福州地铁6号线一期工程及西延线工程为案例，定量分析轨道交通建设阶段的碳排放特征。研究结果表明：建材生产阶段是碳排放的主要来源，占总排放的50%～79%，其中钢筋、混凝土（商品混凝土）和水泥是主要贡献因子。车站层面的碳排放强度为1.67～3.40 tCO₂e/m²，受车站规模和结构设计影响；单位经济强度为1.54～3.40 tCO₂e/万元，主要受轨道交通低碳程度影响。区间层面的碳排放强度因施工方法不同呈现显著差异，其中采用明挖法施工的区间碳排放强度更高，最高达36.5 tCO₂e/双延米，主要因其对钢材和混凝土的需求较高。本研究为城市轨道交通全生命周期低碳建设提供科学依据，对推进轨道交通绿色低碳转型具有重要的理论价值和实践指导意义。更多还原

【Abstract】 This study addresses the issues of energy consumption and greenhouse gas emissions caused by the rapid development of urban rail transit and proposes a budget quota-based carbon emission accounting method for rail transit. By integrating carbon emission intensity and economic intensity indicators, a multi-level carbon emission analysis framework—comprising “stationsection-line”—is constructed. Using the Fuzhou Metro Line 6 Phase I and its western extension project as a case study, the carbon emission characteristics during the construction phase of rail transit are quantitatively analyzed. The results indicate that the production of construction materials is the primary source of carbon emissions, accounting for 50% to 79% of total emissions, with steel reinforcement, concrete, and cement being the major contributing factors. At the station level, the carbon emission intensity per unit area ranges from 1.67 to 3.40 tCO₂ e/m², influenced by station scale and structural design; the economic intensity ranges from 1.54 to 3.40 tCO₂ e per ten thousand yuan, mainly affected by the low-carbon level of rail transit technologies. At the section level, carbon emission intensity varies significantly with different construction methods.Sections using the cut-and-cover method exhibit higher carbon emissions, with the maximum reaching 36.5 tCO₂ e per double track meter, primarily due to higher demand for steel and concrete. This study provides a scientific basis for low-carbon construction throughout the lifecycle of urban rail transit, and holds significant theoretical and practical value for promoting the green and low-carbon transformation of the rail transit sector.更多还原