The Evaluation Effect of Thermal Load on Geothermal Pile in Layered Soil

Document Type : Original Article

Authors

1 Assistant professor, Faculty of engineering.Qom University of Technology

2 Graduated Student in Civil Engineering, Civil Engineering Department, Faculty of Engineering, Qom University of Technology, Qom, Iran

Abstract

Energy pile is dual purpose foundation that transfers structural loads and also transforms energy. They act as heat exchanger in addition to transferring loads to underneath earth layers. The change in temperature along energy piles, resulting from their employment in heat exchange operations, causes axial displacements, thermally induced axial stresses and changes in mobilized shaft resistance which may have possible effects on their behavior. To investigate the effects of soils on energy pile, in present study a two dimensional (2D), axisymmetric numerical model for the energy piles has been created using finite element method base on the field test. The main purpose of this study is investigating energy pile response in various soils. This was performed by considering some different hypothetical layers with the bedrock under them and their results which included displacement, strain and stresses induced by thermal load compared with four layered soil experimental data. The results showed that soil properties have important effect on the response of energy pile. Also temperature affects pile reactions. e results showed that soil properties have important effect on the response of energy pile. Also temperature affects pile reactions. Obtained results show that displacements, stresses and strains in layered soils are between the displacements, stresses and strains obtained in homogeneous soil layers. The results show that the soil stiffness increases, the strains decreases

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Main Subjects

Scientific Quarterly Journal of Iranian Association of Engineering Geology
Volume 16, Issue 2 - Serial Number 2
September 2023
Pages 75-88

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History

  • Receive Date: 18 December 2022
  • Revise Date: 04 July 2023
  • Accept Date: 06 August 2023

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