Abstract: Highway tunnel construction needs to consume energy and materials and emit a large amount of greenhouse gases into the atmosphere. As the main process of highway tunnel construction, surrounding rock support accounts for a large proportion of energy and material consumption, but at present, less attention is paid to the carbon emission of tunnel surrounding rock support and specific carbon reduction methods. Based on this, the calculation caliber and measurement model of carbon emissions were standardized and studied. According to the carbon emission calculation results of tunnel support construction of 40 tunnels with different grades and lengths of surrounding rock, key carbon emission sources were analyzed, and a carbon emission prediction model for tunnel support construction was established thereby. The specific carbon reduction paths including optimizing construction machinery configuration and using recycled materials were proposed. Finally, a case study was conducted to analyze the carbon reduction effect. The research results show that two carbon reduction measures can reduce carbon emissions by up to 7.62% and 24.83%, respectively.

Key words: enviroment engimeering, tunnel construction, surrounding rock support, carbon emissions, carbon reduction path

摘要： 公路隧道施工需要消耗能源与材料，并向大气中排放大量温室气体。围岩支护作为公路隧道施工的关键工序，其能源、材料消耗占比较大，但目前对隧道围岩支护碳排放与具体减碳方法关注较少。因此，笔者标准化研究了碳排放计算口径与碳排放计量模型，根据40座不同围岩级别与长度的隧道支护施工碳排放计算结果，分析出重点碳排放源，并依此建立了隧道支护施工碳排放预测模型，提出了包括优化施工机械配置、使用再生材料的具体减碳路径，最后通过案例进行了减碳效果分析。研究结果表明：2项减碳措施分别至多可减少碳排放7.62%与24.83%。

关键词: 资源环境, 隧道施工, 围岩支护, 碳排放, 减碳路径