减少交通基础设施碳排放被认为是应对气候变化的潜在途径之一.为了估算高速公路施工活动二氧化碳排放量,确定施工期主要碳排放源,提出一种基于工程预算高速公路施工期的碳排放估算方法,将施工期分为材料运输和现场施工两个阶段.研究结果表明:75％以上的碳排放来自于施工机械设备,材料运输和人工分别占13％和8.5％,并且材料运输、人工和施工机械平均碳排放为211.43、136.06、1236.54 t CO2/km;同时,路基、路面和桥梁涵洞的平均单位里程碳排放为1038.05、1038.05、2 925.68 t CO2/km,单位建安费平均碳排放水平为0.47、0.05、0.28 tCO2/万元;此外,在材料运输中,超过75％的碳排放来自于自卸汽车;在现场施工中,77％以上的碳排放来自打桩钻孔机械、金属木石料加工机械、土石方工程机械和起重及垂直运输机械.总体而言,研究结果可以为施工单位开展碳排放管理、机械设备选择提供参考.
Research on Carbon Emission Estimation of Expressway Construction Period Based on Project Budget
Reducing carbon emissions from transport infrastructure is considered one of the potential ways to combat climate change.In order to estimate CO2 emissions from expressway construction activities and determine the main carbon emission sources during construction period,this paper proposes a carbon emission estimation method based on project budget for expressway construction period,which is divided into two stages:material transportation and on-site construction.The results show that more than 75％of carbon emissions come from construction machinery and equipment,material transportation and labor accounted for 13％and 8.5％respectively,and the average carbon emissions of material transportation,labor and construction machinery are 211.43,136.06,1 236.54 t CO2/km,respectively.Meanwhile,the average carbon emission per unit mileage of roadbed,pavement and bridge culvert is 1 038.05,1 038.05,2 925.68 t CO2/km,and the average carbon emissions per unit construction and installation cost are 0.47,0.05,0.28 t CO2/(ten thousand yuan).In addition,more than 75％of carbon emissions in the transportation of materials come from dump trucks;in site construction,more than 77％of carbon emissions come from piling and drilling machinery,metal wood and stone processing machinery,earthwork engineering machinery and lifting and vertical transport machinery.In general,the research results of this paper can provide reference for the construction unit to carry out carbon emission management and mechanical equipment selection.
expresswayconstruction periodcarbon emission estimationcarbon emissions per mile
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