能源桩传热与承载特性研究现状及展望

能源桩是一种在传递上部结构荷载的同时获取浅层地热能源的新技术，给桩基结构的设计及安全服役提出了新的挑战。从能源桩实际应用的角度，围绕能源桩传热性能和承载性能两个关键科学问题，从4个方面综述目前的研究现状：（1）能源桩的热传递研究；（2）能源桩的结构响应特征；（3）能源桩的承载变形特性；（4）能源桩的荷载传递机制。在此基础上，对当前能源桩传热模型的适用性、热交换作用下能源单桩及群桩的承载特性以及长期运行条件下的承载性能及结构安全性进行了讨论，最后对能源桩工程下一步研究进行了展望。分析成果对于保证结构安全，合理开发浅层地能具有重要意义。

Review and prospect on heat transfer and bearing performance of energy piles

Energy pile is a relatively new foundation technology for extracting the shallow geothermal energy from surrounding rock and soil mass when transferring the load of the upper building, which poses a new challenge for the design and safety service of pile foundations. In the view of the practical application of energy piles, this paper focuses on two key scientific issues of heat transfer performance and bearing performance of energy piles. The main research problems related to energy piles are introduced from the following four types of research: heat transfer of energy piles, structural response characteristics of energy piles, bearing performance of energy piles, and load transfer mechanism of energy piles. On this basis, the applicability of current heat transfer model of energy piles, the bearing characteristics of single pile and pile groups under heat exchange, bearing performance and structural safety under long-term operating conditions are discussed. Finally, future research on energy pile engineering is prospected. The analysis results are significant for ensuring structural safety and developing the shallow ground energy rationally.