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Physical Modeling Of Thermo-Hydro-Mechanical Behavior Of Single Energy Piles In Unsaturated Soil

Rahnemai Shahsavari, Salar | 2024

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 57198 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Jafarzadeh, Fardin
  7. Abstract:
  8. Thermal piles represent a novel technology in engineering for harnessing clean, cost-effective, and renewable surface geothermal energy. Due to their composite nature, they have a lower initial construction cost compared to other similar systems. However, their dual thermal-mechanical performance presents challenges in analyzing their interaction behavior and designing them safely and efficiently, necessitating further research and studies.The main objective of this research is to investigate the thermo-hydro-mechanical behavior of single geothermal energy piles (GEPs) in unsaturated soils. By physically modeling these systems under gravitational acceleration conditions (g1), this study aims to examine their mechanical performance, including bearing capacity, settlement, strain and stress distribution, and other factors, under the influence of thermal loads and changes in the hydraulic conditions of the surrounding soil. Additionally, the behavior of the surrounding soil is monitored.To achieve this, an appropriate physical model was developed using the available equipment in the Advanced Soil Mechanics Laboratory at Sharif University of Technology (SUT). Experiments conducted on this model provided adequate and suitable data to understand the dual behavior patterns of these piles. Significant findings include the lack of influence of mechanical surcharge on pile head fixity, the increased contribution of pile tip bearing due to rising pile temperature, and the increase in bearing capacity with heating and decrease with cooling
  9. Keywords:
  10. Energy Pile ; Physical Model ; Unsaturated Soil ; Firuzkouh Sand ; Geothermal Pile ; Thermo Hydromechanical Analysis

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