Full
Outline
This study addresses the issues of energy consumption and greenhouse gas emissions caused by the rapid development of urban rail transit and proposes a budget quota-based carbon emission accounting method for rail transit. By integrating carbon emission intensity and economic intensity indicators, a multi-level carbon emission analysis framework—comprising “station-section-line”—is constructed. Using the Fuzhou Metro Line 6 Phase I and its western extension project as a case study, the carbon emission characteristics during the construction phase of rail transit are quantitatively analyzed. The results indicate that the production of construction materials is the primary source of carbon emissions, accounting for 50% to 79% of total emissions, with steel reinforcement, concrete, and cement being the major contributing factors. At the station level, the carbon emission intensity per unit area ranges from 1.67 to 3.40 tCO2 e/m2, influenced by station scale and structural design; the economic intensity ranges from 1.54 to 3.40 tCO2 e per ten thousand yuan, mainly affected by the low-carbon level of rail transit technologies. At the section level, carbon emission intensity varies significantly with different construction methods. Sections using the cut-and-cover method exhibit higher carbon emissions, with the maximum reaching 36.5 tCO2 e per double track meter, primarily due to higher demand for steel and concrete. This study provides a scientific basis for low-carbon construction throughout the lifecycle of urban rail transit, and holds significant theoretical and practical value for promoting the green and low-carbon transformation of the rail transit sector.
73
19
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
