Field Test and Numerical Simulation of Hydraulic-Thermal-Mechanical Tunnel in High Altitude Cold Area

Pan Zhenhua; Bao Weixing; Guo Qiang; Che Bowen; Lu Hanqing

doi:10.20174/j.JUSE.2025.02.31

Chinese Journal of Underground Space and Engineering >

2025 , Vol. 21 >Issue 2: 637 - 647

DOI: https://doi.org/10.20174/j.JUSE.2025.02.31

Field Test and Numerical Simulation of Hydraulic-Thermal-Mechanical Tunnel in High Altitude Cold Area

Pan Zhenhua ,
Bao Weixing ,
Guo Qiang ,
Che Bowen ,
Lu Hanqing

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1. School of Highway, Chang'an University, Xi'an 710064, P.R. China;
2. Xinjiang Transportation Construction Administration Bureau, Urumqi 830049, P.R. China

Received date: 2024-04-17

Online published: 2025-05-06

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Abstract

In the high altitude cold area, tunnel disease is a serious threat to road safety. In this paper, a large number of monitoring data obtained from field experiments are used to study the climatic characteristics and temporal and spatial distribution of temperature field in a tunnel in a cold area of high altitude on the Qinghai-Tibet Plateau. The coupling frost heave model of hydraulic-thermal-mechanical is established, and the hydraulic-thermal-mechanical numerical simulation is carried out by using the coefficient type partial differential equation and the solid mechanics model in COMSOL mathematical module. The accuracy of the model was verified by the monitoring data. On this basis, the hydraulic-thermal-mechanical distribution characteristics of the tunnel project in the cold region were studied. The results show that there is a strong correlation between the outside air temperature and the tunnel temperature, and the closer to the entrance, the stronger the response between the two. The influence of air temperature on the radial temperature field of tunnel is mainly reflected in the lining and shallow surrounding rock, and the influence on the temperature of deep surrounding rock is small and relatively lagging. In the cold season, the ice content at the invert of the tunnel and the secondary lining stress at the side wall of the tunnel reach the maximum. In addition, the interaction between meteorological elements, lining and surrounding rock is the main cause of freezing damage at tunnel entrance in high altitude cold area. The research results are helpful to better understand the mechanism of hydraulic-thermal-mechanical action of tunnels in cold areas of high altitude, and provide scientific basis and reference for the design and maintenance of tunnel engineering in cold areas.

Key words： high altitude; cold region tunnels; temperature; climate characteristics; hydraulic-thermal-mechanical coupling; numerical simulation

Cite this article

Pan Zhenhua , Bao Weixing , Guo Qiang , Che Bowen , Lu Hanqing . Field Test and Numerical Simulation of Hydraulic-Thermal-Mechanical Tunnel in High Altitude Cold Area[J]. Chinese Journal of Underground Space and Engineering, 2025 , 21(2) : 637 -647 . DOI: 10.20174/j.JUSE.2025.02.31

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