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| Teat damage prevention technology and development trend of high temperature tunnels |
| WANG Sheng1,2,3,4, YANG Lingrun1,2*, LI Liping3, WEI Qin1,2, HU Xuebing4
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1. State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, China;
2. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China;
3. State Key Laboratory of Intelligent Manufacturing of Advanced Construction Machinery, Shandong University, Jinan 250061, Shandong, China;
4. China Merchants Chongqing Communications Technology Research &
Design Institute Co., Ltd., Chongqing 400067, China |
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Abstract By clarifying the problems constraining the prevention and control of thermal damage in high-geothermal tunnels—including unclear multi-source heat transfer mechanisms, imperfect quantification of thermal damage classification, and low efficiency of cooling and prevention systems—the foundation was laid for building a collaborative and proactive thermal damage control system.This research systematically analyzed the geological causes, impacts, and prevention and control technology systems related to high-geothermal tunnel hazards.The multi-source heat transfer mechanism composed of magmatic activity, rock properties, structural geology, and deep-circulating groundwater was revealed. The controlling effects of various factors on thermal anomaly formation were clarified, along with unquantified factors in thermal hazard classification, challenges in mitigation methods, and future development trends. It was found that high-geothermal conditions lead to the deterioration of the mechanical properties of surrounding rock, resulting in reduced bolt anchoring strength, cracking of concrete linings, and decreased durability.To address thermal hazards, an advanced horizontal drilling temperature detection and early warning technology was proposed, and a collaborative prevention system integrating ventilation cooling, spray cooling, thermal insulation materials, and high-temperature-resistant materials was established.Limitations of the current system and potential breakthroughs were identified. Key challenges included the lack of clear quantitative thresholds for multi-technology coordination under extreme temperatures, the limited balance between strength and thermal insulation in lightweight aggregate concrete, and the urgent need for composite materials with excellent high-temperature resistance and environmental stability.Finally, three development trends for thermal hazard prevention were proposed, facilitating a shift from passive response to active prevention and control, thereby providing safer and more economical solutions for projects such as the Sichuan-Xizang Railway.
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Published: 29 December 2025
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