摘要:研究目的:寒区隧道冻害问题时有发生，防排水对策是冻害防控措施的重要组成部分，其中尤以排水沟 的合理埋置深度最为重要，该深度受温度场控制，被气象环境、地质环境和工程措施三个因素影响。鉴于国内 外对考虑热流固耦合效应的寒区隧道温度场和排水沟埋置深度的研究较少，本文结合实际工程对此问题进 行研究，以期为寒区隧道冻害防治提供技术支撑。研究结论:本文采用理论分析、数值试验、现场测试三种手段，基于流固耦合传热理论，对寒区隧道温度场 和排水沟的埋置深度进行研究，得到结论如下:( 1)揭示了寒区隧道温度场的时空分布规律，发现了区域冻结 深度与隧道排水沟埋置深度的差异性;（2)研究寒区隧道排水沟埋置深度时，应以热扩散系数作为控制指标，密度、导热系数、比热容均为二级指标;（3)提出了排水沟埋置深度计算公式，该公式基于最冷月平均温度，考 虑了地表岩土体和隧道围岩的热扩散系数的差异性，为寒区隧道排水沟设计提供了依据；（4)通过对东北某 隧道温度场 的深 分 ， 该 的 ， 为 隧道工程的防寒工作。

Abstract: Research purposes: Freezing damage often happens in cold region tunnels. Waterproof and drainage measures are the important component to prevent freezing damage，for which the reasonable buried depth of drains is the most important factor. The depth is controlled by the temperature field， and influenced by the meteorological environment，geological environment and engineering measures. Since less research has been focused on the tunnel temperature field and buried depth of drains，this paper will deeply evaluate this problem based on practical project. The results can provide guidelines for preventing freezing damage. Research conclusions: Utilizing theoretical analysis，numerical experiment， and on - site test measures， and based upon the heat transfer theory of fluid - solid coupling , the temperature field and the buried depth have been thoroughly studied. Several conclusions have been obtained:(1 ) The time and space distribution rules of the temperature field for cold region tunnels have been reached. The relationship between the regional frozen depth and the buried depth of drains has been analyzed. (2) For this problem, thermal diffusivity is the first grade index and the density，thermal conductivity , specific heat are second grade ones. ( 3 ) The formula for the buried depth of drains has been obtained. This formula is based on the average temperature of the coldest month and considered the difference of the thermal diffusion between the surface soil and the surrounding rock of tunnel. Utilizing this formula，the design for drains in cold region can be realized more reasonably. (4)Through analyzing the monitored data from a highway tunnel in nortlieast China， the validity of tliis formula has been verified，which can provide reference and guidance for subsequent similar tunnels.