ANALYSIS OF CARBON REDUCTION EFFECT OF TUNNEL CONSTRUCTION MUCK SOIL UTILIZATION BASED ON LIFE CYCLE ASSESSMENT

QUAN Zhaoxi; CHEN Xiangsheng; CHEN Feng; GAO Wang; HAN Wenlong

doi:10.13205/j.hjgc.202310012

Volume 41 Issue 10

Oct. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(10): 91-98,162

QUAN Zhaoxi, CHEN Xiangsheng, CHEN Feng, GAO Wang, HAN Wenlong. ANALYSIS OF CARBON REDUCTION EFFECT OF TUNNEL CONSTRUCTION MUCK SOIL UTILIZATION BASED ON LIFE CYCLE ASSESSMENT[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(10): 91-98,162. doi: 10.13205/j.hjgc.202310012

Citation:

QUAN Zhaoxi, CHEN Xiangsheng, CHEN Feng, GAO Wang, HAN Wenlong. ANALYSIS OF CARBON REDUCTION EFFECT OF TUNNEL CONSTRUCTION MUCK SOIL UTILIZATION BASED ON LIFE CYCLE ASSESSMENT[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(10): 91-98,162. doi: 10.13205/j.hjgc.202310012

Citation:

QUAN Zhaoxi, CHEN Xiangsheng, CHEN Feng, GAO Wang, HAN Wenlong. ANALYSIS OF CARBON REDUCTION EFFECT OF TUNNEL CONSTRUCTION MUCK SOIL UTILIZATION BASED ON LIFE CYCLE ASSESSMENT[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(10): 91-98,162. doi: 10.13205/j.hjgc.202310012

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ANALYSIS OF CARBON REDUCTION EFFECT OF TUNNEL CONSTRUCTION MUCK SOIL UTILIZATION BASED ON LIFE CYCLE ASSESSMENT

doi: 10.13205/j.hjgc.202310012

1. College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China;
2. Key Laboratory for Resilient Infrastructures of Coastal Cities (MOE), Shenzhen 518060, China;
3. Shenzhen Key Laboratory of Green, Efficient and Intelligent Construction of Underground Metro Station, Shenzhen 518060, China;
4. Foshan Jianying Development Co., Ltd., Foshan 528313, China

Received Date: 2023-01-06
Available Online: 2023-12-26

Abstract

Abstract

The utilization of muck soil has become one of the key tasks in green shield construction. In order to further quantify the carbon emission reduction potential of the resource utilization of the muck soil from tunnel shield construction, the carbon emission estimation method for the whole process of subgrade filling with improved muck soil from tunnel shield construction was established. Based on the actual engineering data of the Shunde Waterway Tunnel Project of the West Extension Line of Jihua Road, the difference in carbon emissions between the utilization of muck soil and conventional landfill treatment was analyzed. In addition, the sensitivity analysis of carbon emissions in the whole process of residue utilization was also carried out. The results showed that:carbon emissions from the utilization of muck soil mainly occur in the muck soil improvement and transportation stage, while those of the conventional landfill treatment mainly occur in the generation stage; the total discharge of muck soil from the Project is about 65029 m³, of which 53162 m³ can be used for muck soil improvement. If totally landfilled, the CO₂ emission during the whole life cycle is about 1.84×10⁶ kg CO₂eq, occupying 11058 m² of landfill site; the CBR of muck soil improved by 3% lime+3% desulfurized gypsum can reach 141.4, and the rebound modulus is 198.8 MPa. The CO₂ produced in the whole process is 8.89×10⁵ kg CO₂eq more than that produced by conventional treatment of muck soil; the CBR of muck soil improved by 3% carbide slag+6% fly ash can reach 89.06, and the rebound modulus is 158.9 MPa. The CO₂ produced in the whole process is 6.44×10⁵ kg CO₂eq less than that produced by conventional treatment of muck soil.
- shield tunnel,
- muck soil utilization,
- life cycle assessment,
- carbon emission reduction

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References(20)

References

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