Study of thermal migration and induced mechanical effects in double U-tube energy piles. (November 2017)

• Record Type: Journal Article
• Authors: Luo, Jin; Zhao, Haifeng; Gui, Shuqiang; Xiang, Wei; Rohn, Joachim
• Is Part Of: Computers and geotechnics. Volume 91(2017)
• Page Start: 1
• Page End: 11
• Publication Date: 2017-11
• Subjects: Energy piles -- Thermal response test -- Thermally induced mechanical effects -- Restraint conditions; Engineering geology -- Data processing -- Periodicals; Soil mechanics -- Data processing -- Periodicals; Rock mechanics -- Data processing -- Periodicals; 624.1510285
• DOI: 10.1016/j.compgeo.2017.06.015
• Languages: English
• ISSNs: 0266-352X

Abstract

Abstract: This paper investigates two geothermal energy piles using thermal response tests (TRTs). A set of parameters including pile wall temperature, ground temperature and strain are monitored at four different depths. The thermally induced mechanical behavior of the energy piles are then analyzed based on the monitoring data. The results show the following: (1) The temperature at the pile wall clearly varies throughout the heating and cooling cycle, and the ground temperature distribution shows a delay compared to the TRT stages. (2) The thermally induced mechanical effects are influenced by both the temperature and restraint conditions.