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Study on Calculation Method and Influencing Factors of Carbon Emission during Construction of Rectangular Pipe-jacking Tunnels
(1. School of Civil Engineering, North China University of Technology, Beijing 100144; 2. School of Civil and Architectural Engineering, Beijing Jiaotong University, Beijing 100044; 3. China Railway Fourth Survey and Design Institute Group Co., Ltd.,Wuhan 430064; 4. Haixia Traffic Engineering Design Co., Ltd., Fuzhou 350004)
Abstract Based on the rectangular pipe jacking project at the square in front of Putian Railway Station and using the life cycle theory framework combined with the emission coefficient method, this study investigates the calculation method and influencing factors of carbon emissions during the construction of rectangular pipe-jacking tunnels.The research indicates that cement, steel, and electricity are the primary sources of carbon emissions during the construction of rectangular pipe-jacking tunnels. The jacking length of the tunnel is directly proportional to the total carbon emissions of the project, but inversely proportional to the carbon emissions per meter. When the jacking length increases from 224 m to 424 m, the carbon emissions per meter decrease the most, with a reduction of over 26%. When the segment width increases from 1.2 m to 2.4 m, the carbon emissions in terms of segment waterproofing decrease by up to 72%. For the same excavation length, increasing the segment width from 1.2 m to 1.5 m provides the best carbon emission reduction benefits, with a maximum reduction of 4.3%. When the segment width exceeds 1.5 m, the reduction in carbon emissions per meter is no longer significant.
Abstract：
Based on the rectangular pipe jacking project at the square in front of Putian Railway Station and using the life cycle theory framework combined with the emission coefficient method, this study investigates the calculation method and influencing factors of carbon emissions during the construction of rectangular pipe-jacking tunnels.The research indicates that cement, steel, and electricity are the primary sources of carbon emissions during the construction of rectangular pipe-jacking tunnels. The jacking length of the tunnel is directly proportional to the total carbon emissions of the project, but inversely proportional to the carbon emissions per meter. When the jacking length increases from 224 m to 424 m, the carbon emissions per meter decrease the most, with a reduction of over 26%. When the segment width increases from 1.2 m to 2.4 m, the carbon emissions in terms of segment waterproofing decrease by up to 72%. For the same excavation length, increasing the segment width from 1.2 m to 1.5 m provides the best carbon emission reduction benefits, with a maximum reduction of 4.3%. When the segment width exceeds 1.5 m, the reduction in carbon emissions per meter is no longer significant.
.Study on Calculation Method and Influencing Factors of Carbon Emission during Construction of Rectangular Pipe-jacking Tunnels[J] MODERN TUNNELLING TECHNOLOGY, 2024,V61(4): 126-134
2024, Vol. 61 