Abstract The river-crossing tunnel is an important traffic infrastructure in the urban traffic network and one of the main sources of carbon emission in urban traffic, so it is necessary to investigate carbon emission measurement and assessment of river-crossing tunnels and emission reduction mechanism. The first step is to establish the carbon emission measurement boundary and list for the full life cycle of river-crossing tunnels. The life cycle is divided into two parts, i.e. materialization stage and O&M stage. Based on the list analysis, the carbon emission measurement model for the full life cycle of river-crossing shield tunnels is created based on the carbon emission factor method,the correlation between the full life cycle of river-crossing tunnels and the engineering activities is systematically analyzed, and the river-crossing tunnel carbon emission reduction effect estimation process driven by green technologies is devised. The carbon emission result is represented by using the carbon emission reduction effect coefficient. As the study indicates: there is severe lack of quantitative research into the carbon emission reduction effect of various green technologies both at home and abroad. In the materialization stage, the unit carbon emission of shield tunnel increases as the tunnel diameter increases, and there is only limited potential of carbon emission reduction as long as the material and structural design remain unchanged. In the O&M stage, the carbon emission of mechanical and electrical installations is largely equivalent to the carbon emission in the materialization stage. From the aspect of full life cycle, the O&M stage has greater potential of carbon emission reduction and better controllability.
Abstract：
The river-crossing tunnel is an important traffic infrastructure in the urban traffic network and one of the main sources of carbon emission in urban traffic, so it is necessary to investigate carbon emission measurement and assessment of river-crossing tunnels and emission reduction mechanism. The first step is to establish the carbon emission measurement boundary and list for the full life cycle of river-crossing tunnels. The life cycle is divided into two parts, i.e. materialization stage and O&M stage. Based on the list analysis, the carbon emission measurement model for the full life cycle of river-crossing shield tunnels is created based on the carbon emission factor method,the correlation between the full life cycle of river-crossing tunnels and the engineering activities is systematically analyzed, and the river-crossing tunnel carbon emission reduction effect estimation process driven by green technologies is devised. The carbon emission result is represented by using the carbon emission reduction effect coefficient. As the study indicates: there is severe lack of quantitative research into the carbon emission reduction effect of various green technologies both at home and abroad. In the materialization stage, the unit carbon emission of shield tunnel increases as the tunnel diameter increases, and there is only limited potential of carbon emission reduction as long as the material and structural design remain unchanged. In the O&M stage, the carbon emission of mechanical and electrical installations is largely equivalent to the carbon emission in the materialization stage. From the aspect of full life cycle, the O&M stage has greater potential of carbon emission reduction and better controllability.
AI Qing1 LI Yixuan1 ZHU Junyi2
.Study on Carbon Emission Characteristics and Emission Reduction Approaches in the Full Life Cycle of River-crossing Shield Tunnels[J] MODERN TUNNELLING TECHNOLOGY, 2023,V60(6): 11-19
2023, Vol. 60 