公路工程

基于碳足迹理论分析，运用全生命周期法和清单分析法，确定养护方案的核算范围和碳排放因子清单，构建国省干线沥青路面养护期养护方案的核算模型。利用构建的模型核算不同养护类型的碳排放量，分析不同类型养护工程的排放特点。研究结果表明：在定额工程量下，日常养护方案中清淤作业和除雪作业分别是清扫作业碳排放量的60倍和35倍；小修保养中坑槽修补、拥包处理和车辙处理碳排放量大；预防性养护中微表处、开普封层和同步碎石封层作业的原材生产阶段和施工建设阶段的碳排量占比相似；大中修养护中加铺沥青上面层的碳排放占比较大。路面修补和加铺上面层作业的碳排量分别为33.6 t和126.4 t,主要碳因素为石油沥青和拌合设备；大修基层作业中除就地热再生，其他基层作业原材生产阶段碳排放量均大于施工阶段，且主要碳因素为水泥。研究可为不同类型养护方案的低碳和绿色化提供数据支撑。

Based on the analysis of carbon footprint theory, the life-cycleand inventory analysis are used to determine the accounting scope and the carbon emission factorsof maintenance project, and the accounting model of maintenance project during the asphalt pavementmaintenance period of national and provincial trunk lines is constructed. The carbon emissions of different maintenance types are calculated by using the model, and the emission characteristics of different types of maintenance projects are analyzed. The results show that: under the quota quantity, the carbon emissions of dredging and snow removal operations in the daily maintenance project are 60 times and 35 times of that of cleaning operations; during minor repair and maintenance, pit repair, packing treatment and rutting treatment have large carbon emissions; the proportion of carbon emissions in the material production stage and construction stage of micro surfacing, Cape Seal and synchronous gravel seal in preventive maintenance is similar; the carbon emission of asphalt overlay in large and medium-sized maintenance accounts for a large proportion. The carbon emissions of pavement repair and overlay operations are 33.6 t and 126.4 t, and the main carbon factors are petroleum asphalt and mixing equipment; duringthe major overhaul of grassroots operations period, in addition to geothermal regeneration, the carbon emissions in the production phase of raw materials for other grass-roots operations are greater than those in the construction phase, and the main carbon factor is cement. The research can provide data support for the low-carbon and green of different types of maintenance projects.