Proceedings of the Canadian Society of Civil Engineering Annual Conference 2021 - CSCE21 Construction Track Volume 1
Proceedings of the Canadian Society of Civil Engineering Annual Conference 2021 - CSCE21 Construction Track Volume 1
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加拿大土木工程学会 2021 年年会论文集 - CSCE21 建筑轨道第 1 卷
DOI：
10.1007/978-981-19-1029-6_12
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Hojjati A
中科院分区：
文献类型：
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作者：
Hojjati A
不断推进的城市化以及随之而来的开发新城市的要求刺激了对更多地下公用设施基础设施的需求。传统的公用设施布置方法，即明挖挖沟技术，其社会、环境和间接经济成本都很昂贵。这就需要考虑替代施工方法，例如多功能隧道 (MUT)。然而，缺乏对其短期和长期成本和影响的量化（即对转向 MUT 的所有后果的全面了解）阻碍了其采用。碳核算是全球重要的考虑因素，在建筑行业中越来越多地采用，并且可以用作令人信服的论据，说明为什么 MUT 等替代方案可能是正在推进全球可持续发展议程的城市中公用设施布局的首选方法。本文比较了露天挖掘与齐平安装 MUT 的碳成本估算。结果表明，虽然齐平式 MUT 与明切安装方法相比在短期内具有更大的碳足迹，但从长期（在其整个生命周期）来看，它们可以通过消除大量挖掘和恢复 (E&R) 程序来节省大量碳，而这些程序对于埋地公用设施服务的维修和维护是不可避免的。该研究揭示了当重复的 E&R 工作被消除时，在减少碳排放方面有利于嵌入式 MUT 的临界点，以支持其采用。
Progressive urbanization and the concomitant requirement to develop new cities fuels the need for more sub-surface utility infrastructure. Conventional methods of utility placement, i.e. open-cut trenching techniques, are expensive in terms of their many social, environmental, and indirect economic costs. This necessitates consideration of alternative construction methods such as Multi-Utility Tunnels (MUTs). However, a lack of quantification of their short-term and long-term costs and impacts (i.e. a comprehensive understanding of all the consequences of moving to MUTs) inhibits uptake. Carbon accounting, a globally important consideration, is increasingly adopted within the construction industry and could be used as a convincing argument for why alternatives such as MUTs might be a preferred method of utility placement in cities that are advancing global sustainability agendas. This paper compares carbon cost estimations of open-cut excavations with flush-fitting MUTs. The results show that although flush-fitting MUTs have much greater carbon footprints in the short-term compared to open-cut installation methods, they would save a considerable amount of carbon in the long-term (over their lifetime) by eliminating the need for numerous excavation and reinstatement (E&R) procedures, which are inevitable for repair and maintenance of buried utility services. The research reveals the tipping points in favour of flush-fitting MUTs, in terms of carbon saved, when repetitive E&R works are eradicated, to support their adoption.