Comparative Analysis on Ground Subsidence Above Entrances of Shield Tunnels by Horizontal Freezing

LU Qingrui; JIN Xiuwei; LI Dongwei; CEHN Shijun; WANG Shuairu

doi:10.13204/j.gyjzG22070507

Volume 53 Issue 11

Nov. 2023

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LU Qingrui, JIN Xiuwei, LI Dongwei, CEHN Shijun, WANG Shuairu. Comparative Analysis on Ground Subsidence Above Entrances of Shield Tunnels by Horizontal Freezing[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(11): 50-54,49. doi: 10.13204/j.gyjzG22070507

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Comparative Analysis on Ground Subsidence Above Entrances of Shield Tunnels by Horizontal Freezing

doi: 10.13204/j.gyjzG22070507

Donghua University of Technology, Nanchang 330013, China

Received Date: 2022-07-05

Abstract

Abstract

Taking a shield tunnel section in Shanghai Rail Transit as the research object, considering different influencing factors including frozen and unfrozen construction and different frozen days, the thermal-mechanical coupling model of tunneling for shield tunnels was constructed and the simulation results were compared with the in-situ monitoring data. The results indicated that the overall trend of the calculated subsidence was consistent with the measured data; the ground subsidence at the entrance of tunnels was reduced by 82.3% in the horizontal frozen condition compared with not being horizontally frozen condition; simultaneously, the different horizontal-frozen days had little effect on the ground subsidence.
- shield tunnel,
- entrance of tunnel,
- horizontal freezing,
- ground subsidence

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