Open AccessNumerical Simulation Research on Multi-field Coupling of Underground Energy Pile
Author(s) -
Qihui Zhou,
Zhan-jun Huang,
Yong Wu,
Huipeng Zhang,
Yufeng Shi,
Xueqiu He,
Qianshen Chen,
Wangjing Yao,
Wei-Ting Liu
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1838/1/012061
Subject(s) - pile , foundation (evidence) , geotechnical engineering , bearing capacity , structural engineering , finite element method , coupling (piping) , multiphysics , bearing (navigation) , stress (linguistics) , dynamic load testing , thermal , displacement (psychology) , engineering , mechanical engineering , physics , linguistics , philosophy , archaeology , astronomy , meteorology , history , psychology , psychotherapist
The bearing capacity of the pile foundation determines the safety and stability of the upper structure. However, during the thermal cycling of the energy pile, the stress of the pile will be changed due to temperature changes., which will affect the bearing capacity of the energy pile foundation. In order to analyze the mechanical properties of the energy pile under multi-field coupling, the finite element software COMSOL Multiphysics is used to establish the thermal-mechanical coupling analysis model of the energy pile. We apply thermal load on the pile body and vertical load on the top of the pile. The results show that: Under the multi-field coupling of temperature and mechanical load, the energy pile body expands when heated, and the displacement of the pile top decreases; this will cause uneven settlement between the energy pile foundation laying the heat exchange tube and other pile foundations, which will lead to the tilt and damage of the superstructure; the stress of the pile during the heating of the energy pile will increase.