The accurate accounting and
effective management of carbon emissions in the embodied stage of railway
tunnels are essential. Therefore, in this study, the process analysis method is
used as the foundation for carbon emission accounting, and the input-output method supplements materials with unclear carbon emission
coefficients. This results in the application of a hybrid approach to carbon
emission accounting in the embodied stage of tunnels. The tunnels are divided
into unit modules based on their functional differences, and a carbon emission
accounting model for the embodied stage of railway tunnels is developed using
the modularization theory. Furthermore, the data quality index is integrated
with the Monte Carlo method to analyze the uncertainty in the inventory data
for carbon emission accounting. Finally, the K-means
algorithm is applied to classify the construction process into five management
item categories, thereby establishing a targeted carbon emission accounting
model based on carbon emissions and uncertainty. The results reveal the
following: (1) The total carbon emission per linear meter of the tunnel is
11.625 t, with a variation coefficient of 6.13%. This confirms the reliability of the accounting results. (2) The
carbon emission from secondary lining, primary support, and advance support
accounts for 78.54% of the total emissions. Thus, the emissions fall under the
"people-materials-machines"
management category and should be prioritized in carbon emission management.
(3) Furthermore, a detailed analysis of the carbon emissions and material
uncertainty indicates that key materials in emission management should also be
considered in addition to cement and steel, sand and stone, water-reducing agents, and slag powder.
BAO Xueying
,
LIAO Chenghan
,
LI Zilong
,
LYU Xiangru
.
Carbon Emission Accounting Methods and Management Paths in Embodied Stage of Railway Tunnels
[J]. Tunnel Construction, 2025
, 45(2)
: 284
-2
.
DOI: 10.3973/j.issn.2096-4498.2025.02.004
