Low-carbon effects of constructing a metro station with new pipe curtain method: A case study

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology Pub Date : 2025-09-22 DOI:10.1016/j.tust.2025.107114

Chao Kong , Baixin An , Shengtao Wang , Junru Zhang , Yong Wang , Jimeng Feng

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引用次数: 0

Abstract

By optimizing the connection method between adjacent steel pipes in the pipe curtain, conduct load-bearing capacity tests, while the construction sequence and support parameters were improved, the extended flange concrete-filled steel pipe curtain structure was formed. The carbon emissions of both the extended flange concrete-filled steel pipe curtain method and the pile beam arch method were calculated separately. Based on a bidirectional verification mechanism of top-down decomposition and bottom-up aggregation, the rationality of the system boundary was effectively validated, eliminating duplicate carbon emission calculations caused by fragmented construction processes. The research results indicate that: The welding of upper and lower flange plates + bolts connection method has the optimal bearing capacity, by integrating optimized measures such as the wing-reinforced concrete-steel pipe curtain structure, the pilot tunnel-rebar-steel pipe foot support system, and the steel pipe center column with top longitudinal reinforcement beams, the deformation control effectiveness of the extended flange concrete-filled steel pipe curtain method is further enhanced, while material consumption is reduced; The total carbon emissions of the extended flange concrete-filled steel pipe curtain method amounted to 4,305.55 tCO_2eq, representing a 10.55 % reduction compared to the pile beam arch method of this reduction, 76.12 % was contributed by the optimization of the support system. A carbon accounting system based on a bidirectional verification mechanism “unit project–subproject–unit process” was established, ensuring the accuracy of the settlement results. The optimized construction method proposed in this study better aligns with practical engineering requirements and national carbon emission reduction policies. A unique bidirectional carbon emission verification mechanism is employed to ensure the accuracy of calculated results, which may serve as a reference for related research.

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新型管幕法建设地铁车站的低碳效果研究

通过优化管幕内相邻钢管之间的连接方式，进行承载力试验，同时对施工顺序和支护参数进行改进，形成扩展法兰钢管混凝土幕结构。分别计算了扩展翼缘钢管混凝土帷幕法和桩梁拱法的碳排放量。基于自顶向下分解、自底向上聚合的双向验证机制，有效验证了系统边界的合理性，消除了施工过程碎片化造成的重复碳排放计算。研究结果表明：上下法兰板焊接+螺栓连接法承载能力最优，通过翼面钢筋混凝土-钢管幕结构、先导隧道-钢筋-钢管脚支撑体系、钢管中心柱顶部纵向配筋梁等优化措施的整合，进一步增强了扩展法兰钢管混凝土幕法的变形控制效果，同时降低了材料消耗；扩展法兰钢管混凝土帷幕法的总碳排放量为4305.55 tCO2eq，比桩梁拱法减少10.55%，其中76.12%的碳排放量来自于支护系统的优化。建立了基于“单位项目-子项目-单位流程”双向核查机制的碳核算体系，保证了结算结果的准确性。本研究提出的优化施工方法更符合实际工程要求和国家碳减排政策。采用独特的双向碳排放验证机制，保证了计算结果的准确性，可为相关研究提供参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Tunnelling and Underground Space Technology 工程技术-工程：土木

CiteScore

11.90

自引率

18.80%

发文量

454

审稿时长

10.8 months

期刊介绍： Tunnelling and Underground Space Technology is an international journal which publishes authoritative articles encompassing the development of innovative uses of underground space and the results of high quality research into improved, more cost-effective techniques for the planning, geo-investigation, design, construction, operation and maintenance of underground and earth-sheltered structures. The journal provides an effective vehicle for the improved worldwide exchange of information on developments in underground technology - and the experience gained from its use - and is strongly committed to publishing papers on the interdisciplinary aspects of creating, planning, and regulating underground space.