岩土力学2025，Vol.46Issue(2)：573-581,612,10.DOI:10.16285/j.rsm.2024.0488
综合管廊始发井能源支护桩热力响应现场试验
Field tests on thermal response characteristics of energy support piles in starting well of utility tunnel
摘要
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.关键词
能源支护桩/基坑开挖/间歇比/换热性能/热力响应Key words
energy support pile/pit excavation/interval ratio/heat transfer performance/thermal response分类
建筑与水利引用本文复制引用
任连伟,王书彪,孔纲强,杨权威,邓岳保..综合管廊始发井能源支护桩热力响应现场试验[J].岩土力学,2025,46(2):573-581,612,10.基金项目
国家自然科学基金(No.51922037,No.U23A20600) （No.51922037,No.U23A20600）
宁波大学滨海城市轨道交通协同创新中心开放基金(No.XT2022001). This work was supported by the National Natural Science Foundation of China(51922037,U23A20600)and the Open Fund Project of Collaborative Innovation Center of Coastal Urban Rail Transit,Ningbo University(XT2022001). （No.XT2022001）
