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隧道建设(中英文) ›› 2026, Vol. 46 ›› Issue (6): 1254-1264.DOI: 10.3973/j.issn.2096-4498.2026.06.011

• 研究与探索 • 上一篇    下一篇

基于LCA的泥水盾构弃浆制备同步注浆材料碳足迹模型及工程应用

沈婕1, 2, 章邦超3, 王顺生3, 蒋浩梁4, 5, 肖磊4, 5, 王树英6, *   

  1. (1. 广州地铁集团有限公司, 广东 广州 510000; 2. 广州地铁建设管理有限公司, 广东 广州 510220; 3. 中铁建华南建设有限公司, 广东 广州 511455; 4. 中铁十一局集团有限公司, 湖北 武汉 430061; 5. 中铁十一局集团城市轨道工程有限公司, 湖北 武汉 430074; 6. 深圳大学土木与交通工程学院, 广东 深圳 518052)
  • 出版日期:2026-06-20 发布日期:2026-06-20
  • 作者简介:沈婕(1993—),女,上海人,2020年毕业于华南理工大学,工程管理专业,硕士,高级工程师,现从事轨道交通管理与研究工作。Email: tthhvv@126.com。*通信作者: 王树英, E-mail: swang24@szu.edu.cn。

Life Cycle  Assessment-Based Carbon Footprint Model for Synchronous Grouting Material Prepared From Waste Slurry From Slurry Shield Tunneling

SHEN Jie1, 2, ZHANG Bangchao3, WANG Shunsheng3, JIANG Haoliang4, 5, XIAO Lei4, 5, WANG Shuying6, *   

  1. (1. Guangzhou Metro Corporation, Guangzhou 510000, Guangdong, China; 2. Guangzhou Metro Corporation Management Co., Ltd., Guangzhou 510220, Guangdong, China; 3. China Railway Construction South China Construction Co., Ltd., Guangzhou 511455, Guangdong, China; 4. China Railway Eleventh Bureau Group Co., Ltd., Wuhan 430061, Hubei, China; 5. China Railway 11th Bureau Group Urban Rail Engineering Co., Ltd., Wuhan 430074, Hubei, China; 6. School of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518052, Guangdong, China)
  • Online:2026-06-20 Published:2026-06-20

摘要: 针对泥水盾构施工过程中产生的大量弃浆,在传统压滤脱水—外运填埋处置模式下存在能耗高、碳排放量大及环境风险突出的工程问题,以盾构弃浆资源化利用为目标,提出一种将弃浆原位转化为流态盾构弃浆基同步注浆材料的技术路径。基于生命周期评价(LCA)方法,构建涵盖弃浆收集与筛分、调控搅拌、浆液制备及泵送注浆等全过程的碳足迹模型,并结合广花城际白方—方石区间大直径泥水盾构工程开展实证分析,对比传统弃浆处理与同步注浆模式下的碳排放特征及减排潜力。研究结果表明: 1)所提出的盾构弃浆资源化利用工艺在满足同步注浆材料流动性、凝结时间及强度等工程性能要求的同时,具备良好的施工适应性与稳定性。2)基于LCA构建的碳足迹模型能够系统量化各阶段碳排放贡献,其中浆液制备阶段碳排放占比最高,为全过程主要排放来源; 与传统弃浆处理及同步注浆模式相比,采用该资源化利用路径每环可减少碳排放11 369.16 kg CO2eq,整体碳排放强度降低约14.04%。3)敏感性分析表明,原材料运输距离对碳排放的影响最为显著,其敏感度系数达0.59,而泵送设备工作效率对减碳具有正向促进作用,是优化碳排放的重要控制参数。综上,盾构弃浆原位资源化制备同步注浆材料在降低碳排放和减少弃浆处置规模方面具有显著优势。

关键词: 盾构弃浆, 资源化利用, 同步注浆材料, 生命周期评价, 碳足迹分析

Abstract: To address the significant energy consumption, carbon emissions, and environmental risks associated with traditional treatment methods, a novel approach is proposed for recycling shield slurries to produce a flowable synchronous grouting material. Based on the life cycle assessment (LCA) method, a carbon footprint analysis model is constructed to encompass the entire process of slurry disposal, controlled mixing, slurry preparation, and pumping grouting. A case study is conducted on a large-diameter slurry shield tunnel project of the Baifang-Fangshi Section of the Guangzhou East Railway Station-Huadu Tiangui Intercity Railway, and the carbon emissions and carbon-reduction potential of different stages are systematically evaluated. The proposed resource-utilization process for shield waste slurry meets the engineering performance requirements of synchronous grouting material, such as fluidity, setting time, and strength, while exhibiting good construction adaptability and stability. In addition, the LCA-based carbon footprint model systematically quantifies the carbon-emission contributions of each stage, among which the slurry-preparation stage accounts for the largest share of carbon emissions. Compared with traditional disposal methods, recycling the slurry as a grouting material reduces carbon emissions by 11 369.16 kg CO2eq per ring, resulting in a total carbon-emission reduction of about 14.04%. Furthermore, sensitivity analysis indicates that the transportation distance of raw materials has the greatest impact on carbon emissions, with a sensitivity coefficient of 0.59. In addition, the working efficiency of the pumping equipment has a positive effect on carbon reduction and is a key control parameter for reducing emissions. In summary, the insitu resource utilization of shield waste slurry for preparing synchronous grouting material exhibits significant advantages in reducing carbon emissions and minimizing the scale of waste slurry disposal.

Key words: shield slurry, resource utilization, synchronous grouting, life cycle assessment, carbon footprint analysis