【摘要】 将能源桩技术应用到支护桩形成能源支护桩，不仅可以解决能源桩技术的结构安全问题，还能使资源回收再利用。依托焦作市新河商务区高压线路归并改造综合管廊基坑支护工程，开展基坑开挖前后能源支护桩的热响应试验，并在基坑开挖稳定后进行不同间歇比下能源支护桩的热力响应现场试验，实测进水口、出水口、桩身温度以及应变变化数据，初步探讨了能源支护桩的换热性能、热致应力及桩身弯矩的变化规律。研究结果表明：此试验条件下，基坑的开挖使能源支护桩的换热量得到提升，而桩身附加温度应力减小。不同间歇比下能源支护桩的换热量随着间歇比减小而得到提升，桩身附加温度应力随着循环次数的增加而逐渐增大，且沿埋深逐渐减小。基坑开挖引起桩身弯矩在-8.0 m处最大为128.98 kN·m，且越往两端弯矩越小，随着桩身温度逐渐上升，桩身弯矩先减小后上升；不同间歇比下能源支护桩桩身弯矩随着间歇比的增大而逐渐增大，间歇比为2.0时桩身-4.0 m处产生的弯矩最大为7.12 kN·m。更多还原

【Abstract】 Applying energy pile technology to support piles not only addresses structural safety issues, but also facilitates resource recovery and reuse. Based on the foundation pit support project of high-voltage line merging and reconstruction of a utility tunnel in Xinhe Business District of Jiaozuo City, thermal response tests of energy support piles were conducted before and after foundation pit excavation. Additionally, thermal response field tests of energy support piles under different interval ratios were performed once the excavation stabilized. The inlet/outlet water temperature, pile temperature, and strain change data were measured. Preliminary discussions covered heat transfer performance, thermal stress, and pile bending moments of energy support piles. Results indicate that under these test conditions, pit excavation enhances the heat transfer capacity of the energy support piles, while reducing additional temperature stress on the pile body. For energy support piles with different interval ratios, the heat transfer capacity improves as the interval ratio decreases. Additional temperature stress on the pile body increases with more cycles and decreases with depth. The bending moment of pile body caused by pit excavation is 128.98 kN·m at -8.0 m, decreasing towards both ends. As pile temperature increases, the bending moment initially decreases and then rises. For energy support piles with different interval ratios, the bending moment of pile body increases with the increase of interval ratio, reaching a maximum of 7.12 kN·m at-4.0 m when the interval ratio is 2.0.更多还原