第38卷第5期 2016年10月
土木建筑与环境工程
Journal of Civil,Architectural &.Environmental Engineering
doi:10.11835/j.issn.1674-4764.2016.05.020
双U型埋管能源桩桩周岩土体温度场
分布特征试验研究
赵海丰1.2，唐荣彬3，桂树强1，骆进2，贾甲2
Vol. 38 No. 5 Oct.2016
可口
（1.长江勘测规划设计研究有限责任公司，武汉430010；2.中国地质大学（武汉）工程学院，
武汉430074；3.武汉科技大学资源与环境工程学院，武汉430080）
摘要：以信阳地区两根相邻的双U型埋管能源桩为研究对象，通过较长时间的TRT增温测试一地温恢复-TPT制冷测试模拟了能源桩的间歌性运行状态，在能源桩桩壁和岩土体中理设传感器实测获得了能源桩运行过程中的桩周岩土体温度场分布。研究成果显示，能源桩运行过程中的传热表现为三维传热特征，桩端岩土体的温度变化滞后于桩体中间区域岩土体，建议能源桩设计时在桩端部位适当增加埋管量，以提高能源桩的换热效率；测试结果显示在经过172h的TRT测试并进行约25d的地温恢复后，桩周岩土体温度整体升高了约1C，验证了岩土体温度扩散的缓慢性
及其具有良好的热储性，同时也预示了地源热泵运行过程中存在冷热失衡的可能性。关键词：能源桩；双U型埋管；温度场；分布特征
中图分类号：TU473.1
文献标志码：A
文章编号：1674-4764(2016)05-0157-07
Experimental analysis of ground temperature distribution of
double-Utypeenergypiles
Zhao Haifengl.2,Tang Rongbin",Gui Shuqiang',Luo Jin",Jia Jia(1. Changjiang Institute of Survey, Planning, Design and Research, Wuhan 430010, P.R. China : 2. Faculty of Engineering, China University of Geosciences, Wuhan 430074,P. R. China; 3. Faculty
of Resources and Environmental Engineering Wuhan University of Science and Technology, Wuhan 43008o,P. R. China) Abstract: Two double U-type buried tube energy piles in Xinyang region were investiguted. Long time TRT tests and temperature recovery-TPT test are conducted to simulate the operating state of energy piles under intermittent conditions. Sensors are prepared in the energy pile wall and soil, the distribution of temperature field during the operation of energy piles is measured. ? The research results show energy piles in the operating process of heat transfer performs three-dimensional characteristics, the soil temperature in pile end position changes lag to the middle region of the pile body. It is hence suggested that the increace of the buried pipe in pile end position could increase energy pile heat exchange efficiency. The test results show the temperature of the soil around the pile is increased about 1 'C after temperature recovery about 25
收稿日期：2016-03-09
基金项目：国家自然科学基金（41502238）。
作者简介：赵海丰（1983-），男，高级工程师，博士，主要从事浅层地热能开发利用及岩土工程研究，（E-mail)zhaohaifeng83
@163.com。
Received:2016-03-09
Foundation item:National Natural Science Foundation of China (No. 41502238).
Author brief.Zhao Haifeng (1983-), senior engineer, PhD,main research interest: development and utilization of shallow
万方数据othermal energy, design and research of geotechnical engineering，（E-mail)zhaohaifeng83@163.com