南京师大学报（自然科学版）2026，Vol.49Issue(3)：146-152,7.DOI:10.3969/j.issn.1001-4616.2026.03.016
盾构渣土现场机制砂石生产与外运处置的碳排放对比及减排效益分析
Carbon Emission Comparison and Mitigation Benefit Analysis of On-site Manufactured Sand/gravel Production versus Off-site Disposal of Shield Muck
摘要
Abstract
The utilization of shield muck for manufactured sand and gravel(MSG)production holds significant potential for advancing the national strategy of resource conservation and promoting carbon peaking and carbon neutrality goals.However,current research in China on the carbon reduction potential of producing MSG from shield muck remains limited.This study takes a section of the Guangzhou-Huadu Intercity Railway as a case and employs a life cycle assessment(LCA)approach to establish a carbon emission accounting model for both off-site disposal and on-site MSG production from shield muck.Based on this model,the study systematically evaluates the carbon reduction benefits of on-site resource utilization compared to traditional off-site disposal and further estimates the carbon mitigation potential associated with the production and reuse of MSG.The results show that,compared to conventional off-site disposal(assuming a transport distance of 50 km),on-site MSG production from shield muck can reduce carbon emissions by more than 3.03 kg CO2 per ton.If all shield muck generated from the case section(1000 rings)is used for MSG production,the total carbon reduction benefit could reach approximately 10601 t CO2e.Furthermore,additional measures such as optimizing transport distances for MSG products and reusing dewatered filter cakes could further enhance carbon reduction.This study provides methodological support for the development of carbon reduction assessment frameworks and standards for the resource utilization of shield muck and offers scientific guidance for low-carbon decision-making in the MSG industry.关键词
渣土资源化/机制砂石/生命周期评价/碳排核算/碳减效应Key words
muck recycling/manufactured sand and gravel/life cycle assessment/carbon accounting/carbon reduction effect分类
资源环境引用本文复制引用
曹小卫,章邦超,王顺生,蔡才武,宋康,李继宁..盾构渣土现场机制砂石生产与外运处置的碳排放对比及减排效益分析[J].南京师大学报（自然科学版）,2026,49(3):146-152,7.基金项目
广东省科学院专项资金项目(2023010103,2022010104-2). （2023010103,2022010104-2）
