管道运输是油气战略资源长距离输送最经济有效的运输方式，加热输送能获得最优运输效率和输送成本。目前管道输送设计温度高达177℃，高温下地基的水热耦合效应和管道稳定性研究成为土木、能源领域的重要课题。. 本项目首先基于土体本构理论、渗流和热传导理论，构建管周地基热传导-渗流-变形耦合作用模型，并进行相应的足尺模型试验验证；在此基础上提出地基对管道约束力分析方法，揭示管周地基水热耦合作用机制，建立考虑水热耦合效应的管土相互作用分析模型；基于考虑水热耦合效应和时间效应的地基模型，结合管土接触条件，建立高温管道-地基相互作用三维简化分析方法，并提出温度影响范围评估方法和管道屈曲灾变主动防控措施。拟开展研究提出地基水热耦合效应对管道承载特性影响这一研究新思路，将丰富和发展管土相互作用理论，为改进现有油气管道设计提供科学支撑。

Pipeline transportation is one of the most economical and effective way to transport for long-distance transportation of oil and gas strategic resources, one optima way is transporting by heating oil and gas. At present, the design temperature of oil and gas pipelines nearly up to 177℃, and the study of hydro-thermal coupling effect and the stability of pipelines under high temperature has become an important topic in the field of civil engineering and energy engineering.. Based on the constitutive equations of soils, continuity equations and heat conduction equations, the thermo-hydro-mechanical coupling model of saturated soil around the pipeline will be established and be validated by a full scale model test. On this basis, the analysis approach for the soils resistance will be presented and the thermo-hydro-mechanical coupling mechanism of soils around the pipeline will be revealed, and then an analysis model of pipe-soil interaction will be proposed. Considering the hydro-thermal coupling effect and time effect of the soils, a three-dimensional simplified analysis method for high temperature pipeline-soil interaction will be proposed, corresponding evaluation methods for the depth of heat affected zone and disaster control measures of the pipelines will be brought forward. The research to be carried out will establish a new idea to study the effects of hydro-thermal coupling effect of soils on the bearing capacity of the pipelines, and will develop the theory of pipe-soil interaction greatly, which will provide a scientific support for improving oil and gas pipeline design.