气候变暖条件下基于水一热耦合的隧道温度场变化规律研究

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中图分类号：U451.2 文献标志码：A 文章编号：1003-5168（2025）22-0072-06

DOI：10.19968/j.cnki.hnkj.1003-5168.2025.22.012

Study on Variation PatternsofTunnel TemperatureField Basedon Hydro-Thermal Couplingunder Climate Warming Conditions

WANG Wei1QU Fanqian'KANG Changle² （1.Jiuquan Transportation Energy Development Co.，Ltd.， Jiuquan 735Ooo， China; 2.Gansu Construction Traffic Construction Co.，Ltd.，Lanzhou 730o50， China）

Abstract： [Purposes] To investigate the impact of climate warming on the temperature field of cold-region tunnels.[Methods]A hydro-thermal coupled numerical model was established using COMSOL software for atunnel portal section. Considering a temperature rise of 2.6 C over the next 5O years，the evolution characteristics of the tunnel temperature field during freezing and thawing periods were analyzed.[Findings] The results show that the temperature of the surrounding rock near the surface continuously increases with the rising ambient temperature.However，behind the lining，the temperature of the suirounding rock exhibits a "decline followed by rise" trend due to the thaw-refreeze process induced by excavation disturbance，reaching its lowest values in the 1Oth year（-3.8 ℃ during the freezing period and-1.2 Cduring the thawing period）. The permafrost table descended from2.6min thebaseline year to3.9minthe 5Oth year，with a total displacement of 1.3 m.By the 5Oth year during the thawing period，the temperature of the localized surrounding rock behind the lining approached 0‰ ，forming a small seasonal freeze-thaw circle.[Conclusions] Rising temperatures and the descending permafrost table willdeteriorate the mechanical properties of the surrounding rock，intensifying the risks of thaw setlement and collapse.The research findings can provide a theoretical basis forfrost-prevention designsin cold-region tunnels. Keywords： climate warming; tunnel; hydro-thermal coupling; temperature field; COMSOL

0 引言

近年来，寒区隧道工程规模持续扩大。（剩余3975字）