Evolutionary law of temperature field in thermal water-bearing tunnels and analysis of thermal insulation effect of grouting water-sealing
CHEN Shujie1, 2, ZHU Zhengguo1, 3, GU Guangyan1, AN Chenliang4, MA Kaimeng1, FAN Haobo1
(1. Key Laboratory of Roads and Railway Engineering Safety Control Ministry of Education, Shijiazhuang Tiedao University, Shijiazhuang, Hebei 050043, China; 2. School of Engineering and Applied Science, Queen?s University, Kingston, Ontario K7L, Canada; 3. Hebei Province Technical Innovation Center of Safe and Effective Mining of Metal Mines, Shijiazhuang, Hebei 050043, China; 4. Department of Road and Bridge Engineering, Hebei Jiaotong Vocational and Technical College,
Shijiazhuang, Hebei 050035, China)
Abstract：To investigate the thermal evolution of surrounding rock in high-water-temperature tunnels where both heat conduction and convective heat transfer between geothermal water and rock coexist, this study derives a finite difference solution for the coupled thermal-hydraulic temperature field and develops a three-dimensional numerical model that integrates the high-temperature water-saturated rock mass with tunnel air. A parametric study is conducted to analyze the effectiveness of grouting for water sealing and thermal insulation. Additionally, a physical model test system for high-temperature tunnels is developed to validate the finite difference solution and numerical results. The findings indicate that: (1) when rock permeability exceeds 5×10?? m/s, convective heat transfer from thermal water maintains the rock at its initial high temperature; as permeability decreases, rock temperature declines, but further reduction below 1×10?? m/s yields diminishing cooling returns. (2) Grouting significantly reduces convective heat transfer between water and rock, thereby lowering the temperatures of both rock and air. For rock with a permeability of 1×10?? m/s, a grout zone with permeability two orders of magnitude lower and a thickness of 3 m achieves more pronounced cooling. (3) Model tests demonstrate that initial ventilation leads to rapid rock cooling, which stabilizes over time; wall temperature trends align with the finite difference solution, and the relative errors in wall and outlet air temperatures between simulation and experiment are within 15% and 5%, respectively. Combined grouting and enhanced ventilation are recommended for thermal control in high-temperature tunnels. The results provide theoretical guidance for the cooling design of similar geothermal tunnels.
陈树杰1，2，朱正国1，3，谷广燕1，安辰亮4，马凯蒙1，樊浩博1. 高水温隧道温度场演变规律及注浆堵水隔热效果分析[J]. 岩石力学与工程学报, 2025, 44(12): 3349-3366.
CHEN Shujie1, 2, ZHU Zhengguo1, 3, GU Guangyan1, AN Chenliang4, MA Kaimeng1, FAN Haobo1. Evolutionary law of temperature field in thermal water-bearing tunnels and analysis of thermal insulation effect of grouting water-sealing. , 2025, 44(12): 3349-3366.
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2025, Vol. 44 
