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Evolution of mechanical and thermal behaviors of energy piles considering soil consolidation

Author

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  • Zhao, Yong Zhi
  • Shi, Zhenming
  • Ai, Zhi Yong

Abstract

This study investigates the interaction between energy piles and layered saturated soils, considering the consolidation induced by the thermal loads and mechanical loads. Initially, the coupled thermo-hydro-mechanical solution of layered media is obtained by utilizing the boundary element method (BEM) and the transformed differential quadrature method. Subsequently, the energy piles are discretized and modelled by the finite element method (FEM), and the solving equation for piles is established. To reflect the interaction between piles and soils, a coupled BEM-FEM matrix equation is formulated and solved by incorporating displacement coordination conditions and force equilibrium conditions. This approach facilitates the analysis of the temporal evolution of displacements and temperatures of piles and surrounding soils. The proposed methodology is validated through comparisons with monitoring data of field tests and results from simulations. Ultimately, the key factors, including the temperature increments, mechanical loads, length-diameter aspect ratio are examined through examples.

Suggested Citation

  • Zhao, Yong Zhi & Shi, Zhenming & Ai, Zhi Yong, 2024. "Evolution of mechanical and thermal behaviors of energy piles considering soil consolidation," Applied Energy, Elsevier, vol. 361(C).
    • Handle: RePEc:eee:appene:v:361:y:2024:i:c:s0306261924003106
    DOI: 10.1016/j.apenergy.2024.122927
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    References listed on IDEAS

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