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<p>A novel thermal anchor pipe frame (TAPF) structure is proposed for stabilizing permafrost slopes by integrating two-phase closed thermosyphons (TPCTs) with anchor frame supports. However, its cooling and mechanical performance is not clear. In this paper, the mathematical model containing ice-water phase transition, heat transfer, moisture migration, and thermo-mechanical interactions was developed. Numerical simulations were conducted to assess the cooling and mechanical performance of the TAPF. Results show that TAPF creates a persistent “elliptical” frozen core near the active layer, reducing the maximum thawing depth from 2.21&#xa0;m (unprotected slope) to 1.65&#xa0;m and increasing the permafrost table by 0.56&#xa0;m. During peak cooling, the temperature near the evaporator section dropped to − 8.9&#xa0;°C and the maximum instantaneous heat flux reached 48.75 W/m<sup>2</sup>. TAPF also reduced shear stress along the slip surface and improved the mechanical stability compared to TPCT-only or anchor-only systems. The findings preliminarily suggest that the proposed TAPF structure could offer a promising solution for mitigating thaw-induced slope failures in warm permafrost regions.</p>

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Thermo-Mechanical Evaluation of a Thermal Anchor Pipe Frame System for Permafrost Slope Stabilization

  • 期刊论文

  • 发表日期：

    2025年8月21日

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  • Xiaolei Wu,
  • Jianhua Dong,
  • Pengfei He,
  • Bo Lian,
  • Lu Wang

摘要

A novel thermal anchor pipe frame (TAPF) structure is proposed for stabilizing permafrost slopes by integrating two-phase closed thermosyphons (TPCTs) with anchor frame supports. However, its cooling and mechanical performance is not clear. In this paper, the mathematical model containing ice-water phase transition, heat transfer, moisture migration, and thermo-mechanical interactions was developed. Numerical simulations were conducted to assess the cooling and mechanical performance of the TAPF. Results show that TAPF creates a persistent “elliptical” frozen core near the active layer, reducing the maximum thawing depth from 2.21 m (unprotected slope) to 1.65 m and increasing the permafrost table by 0.56 m. During peak cooling, the temperature near the evaporator section dropped to − 8.9 °C and the maximum instantaneous heat flux reached 48.75 W/m2. TAPF also reduced shear stress along the slip surface and improved the mechanical stability compared to TPCT-only or anchor-only systems. The findings preliminarily suggest that the proposed TAPF structure could offer a promising solution for mitigating thaw-induced slope failures in warm permafrost regions.