Model tests on thermal response of phase-change pile in saturated silt foundation

TANG Yang; ZHENG Ming-fei; SHI Shi-yong

doi:10.11779/CJGE2022S2030

Volume 44 Issue S2

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Chinese Journal of Geotechnical Engineering > 2022 > 44(S2): 139-142. > DOI: 10.11779/CJGE2022S2030

TANG Yang, ZHENG Ming-fei, SHI Shi-yong. Model tests on thermal response of phase-change pile in saturated silt foundation[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(S2): 139-142. DOI: 10.11779/CJGE2022S2030

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Model tests on thermal response of phase-change pile in saturated silt foundation

1.
Ningbo Ningda Foundation Treatment Technology Co., Ltd., Ningbo 315211, China
2.
Institute of Geotechnical Engineering, Ningbo University, Ningbo 315211, China

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Received Date: December 05, 2022
Available Online: March 26, 2023

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Abstract

Abstract

The phase-change concrete energy pile is prepared by using the composite phase-change materials, and the thermal response model tests on the phase-change pile is carried out in silt. On this basis, the finite element model for energy pile is established, and the thermal response characteristics of the phase-change pile and ordinary pile are compared and analyzed. the results show that during the thermal response process in summer (10 ℃→40 ℃→10 ℃, 10 ℃→25 ℃→10 ℃) and winter (16 ℃→5 ℃→16 ℃). The variation range of temperature of the phase-change pile is smaller than that of the ordinary pile, which is helpful to alleviate the thermal accumulation effects of the soil around the pile. The addition of phase-change ceramsite reduces the displacement of the energy pile caused by the pile-soil thermal expansion during the process of heat exchange.
- saturated silt,
- phase-change material,
- energy pile,
- thermal response,
- model test

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