吉林建筑大学学报

能源桩是将建筑桩基与地源热泵结合的一种新型桩基础。为探究不同温度荷载对能源桩力学特性的影响，开展室内模型试验。研究饱和砂土地基中不同温度荷载对桩-土温度场、桩侧摩阻力、桩顶位移的响应。试验结果表明：桩身温度沿深度逐渐减小，桩周土温度沿径向逐渐减小。附加侧摩阻力随入水口温度的升高而增大，升温阶段与自然恢复阶段均上部为负，下部为正。升温导致桩顶产生向上位移，自然恢复导致桩顶产生向下位移。不同温度荷载作用下能源桩模型试验的研究可以为能源桩推广使用提供理论依据。

The energy pile is a new type of pile foundation that combines a building pile foundation with a ground source heat pump.To investigate the effect of different temperature loads on the mechanical properties of energy piles, indoor model tests were carried out.To investigate the response of different temperature loads on the pile-soil temperature field, pile lateral frictional resistance and pile top displacement in saturated sandy soil foundations were studied.The test results show that the pile body temperature decreases gradually along the depth and the soil temperature around the pile decreases gradually along the radial direction.The value of the additional side resistance increases with increasing inlet temperature and is negative at the top and positive at the bottom in both the warm-up and natural recovery phases.The warming causes upward displacement of the pile top and natural recovery of the pile top displacement downwards.The study of model tests on energy piles under different temperature loads can provide a basis for energy piel's wider use.