地铁盾构渣土资源化碳排放强度与减碳潜力研究  

CARBON EMISSION INTENSITY AND CARBON REDUCTION POTENTIAL IN RECYCLINGAND DISPOSAL OF SUBWAY-RELATED SHIELD MUCK

作　　者：李伟 陈刚 曹太波 杨芳盛 陈坤阳 吴环宇[2] LI Wei;CHEN Gang;CAO Taibo;YANG Fangsheng;CHEN Kunyang;WU Huanyu(South China Regional Company,China Construction First Bureau(Group)Co.,Ltd.,Shenzhen 518002,China;College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518061,China)

机构地区：[1]中国建筑一局(集团)有限公司华南区域公司,广东深圳518002 [2]深圳大学土木与交通工程学院,广东深圳518061

出　　处：《环境工程》2023年第7期53-60,共8页Environmental Engineering

基　　金：广东省科技计划项目-广东省自然科学基金面上项目“基于人工智能的建筑废弃物固定消纳场安全风险评估研究”(2022A1515011662);技术开发(合作)课题“深圳市城市轨道交通13号线二期(北延)工程土建四工区隧道施工盾构渣土处理碳减排研究”(2020-13-01FT055)。

摘　　要：盾构渣土资源化利用是地铁建设领域响应国家“双碳”战略的重要举措。为科学量化地铁盾构渣土利用与处置的碳排放强度及减碳潜力,基于LCA方法构建了地铁盾构渣土利用与处置碳排放评价方法,以深圳地铁13号线某隧道区间为例,梳理了盾构渣土资源化利用工艺和系统,厘清了渣土现场资源化利用的管理路径,量化了渣土利用与处置的碳排放强度及减碳潜力。结果表明:案例中渣土资源化利用减碳总量约为4243.13 t CO_(2)e;制备1 m^(3)再生免烧砖可带来239.26 kg CO_(2)e减碳效益,填埋1 m^(3)渣土约产生89.42 kg CO_(2)e。未来深圳地铁建设若均采用案例提供的盾构渣土高效资源化利用方式,预计到2035年可累计实现约77万t CO_(2)e的减排效益。该研究结果可为政府部门科学制定地铁盾构渣土管理政策,推广地铁盾构渣土资源化利用提供理论方法及参考数据。The recycling of shield muck is an important measure in response to China’s Carbon Peak and Carbon Neutrality goal in subway construction.In order to quantify the carbon emission intensity and emission reduction potential in the recycling and disposal of subway shield muck,an assessment method of carbon emission from the recycling and disposal of related subway shield muck was established,based on the LCA method.Taking a tunnel section of Shenzhen Metro Line 13 as an example,the process and system for the recycling of subway-related shield muck were sorted out,the management pathway for the recycling on-site muck was clarified,and the carbon emission intensity and carbon reduction potential of recycling and disposal muck were quantified.The results implied that shield muck recycling reduced 4243.13 t of CO_(2) e emission.The preparation of one cubic meter of recycled unburned brick can contribute 239.26 kg of carbon reduction benefits,while the landfill of one cubic meter of shield muck produces 89.42 kg of CO_(2) e.If the shield muck efficient recycling method provided by the case is utilized for Shenzhen Metro,an amount of 770000 tons of CO_(2) e carbon reduction benefits can be achieved by 2035.The study provides theoretical methods and data for the government to formulate the management policy of subway shield muck and promote the recycling of subway shield muck.

关 键 词：地铁盾构渣土 资源化利用 生命周期评价 碳排放强度 减碳潜力 

分 类 号：X73[环境科学与工程—环境工程]