为助力我国“双碳”目标，并为地铁工程节能减排工作提供数据支撑，解决地铁深基坑工程施工阶段温室气体量化复杂繁琐的问题，基于全生命周期理论，建立地铁基坑工程施工阶段碳排放量模块化计算方法。考虑到地铁深基坑工程临时性的特点，将施工阶段碳排放量计算分为上游材料生产、基坑现场施工和材料运输3个阶段，并对北京城市副中心站综合交通枢纽工程02B基坑及坑中坑基坑施工过程中的温室气体排放量进行计算和分析。结果表明： 1）02B基坑施工阶段排放二氧化碳20
498.50 t，坑中坑基坑施工阶段排放二氧化碳32 422.50 t，共排放二氧化碳52 921.00 t； 2）地铁深基坑工程施工阶段碳排放量与地铁深基坑施工方法和支护强度有关。
To promote China′s Carbon Peaking and
Neutralization Policy, provide data support for energy conservation and
emission reduction of metro projects, and address the complex and cumbersome
problem of greenhouse gas quantification process in the construction stage of
metro deep foundation pit engineering, a modular calculation method for carbon
emissions in the construction stage of metro foundation pit engineering is
established based on the whole life cycle theory. Due to the fact that the
metro foundation pits are temporary, the carbon emission calculation process is
divided into three stages: upstream material production, foundation pit site
construction, and material transportation. Furthermore, the greenhouse gas
emissions during construction process of the 02B foundation pit and the pit in
pit of the Beijing City SubCentral station
comprehensive transportation hub project are calculated and analyzed. The
results show that: (1) The CO2 emitted during the
construction stage of 02B foundation pit and the pit in pit reached 20 498.50 t
and 32 422.50 t, respectively. (2) The carbon emission in the construction
stage of the metro deep foundation pit project is related to the construction
method and support strength of the metro deep foundation pit.
