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Development and validation of a method to predict the soil thermal conductivity using thermal piezocone penetration testing (T-CPTU)
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Liu, Xiaoyan, Congress, Surya Sarat Chandra, Cai, Guojun, Liu, Lulu, Liu, Songyu, Puppala, Anand J. and Zhang, Wenwei (2021) Development and validation of a method to predict the soil thermal conductivity using thermal piezocone penetration testing (T-CPTU). Canadian Geotechnical Journal, 59 (4). pp. 510-525. doi:10.1139/cgj-2021-0034 ISSN 1208-6010.
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Official URL: https://doi.org/10.1139/cgj-2021-0034
Abstract
A new in-situ thermal piezocone penetration test (T-CPTU) system is developed to determine the thermal properties of soil. It is expected to overcome most of the shortcomings observed in existing in-situ test techniques. Based on Fourier's heat conduction equation and pore pressure dissipation theoretical equation, a method for calculating the thermal conductivity, namely the predicted temperature method, was proposed. The accuracy of T-CPTU probe testing process and thermal conductivity calculation results were verified by numerical simulation, laboratory large-scale model tank tests and thermal needle tests. Finally, the field data of T-CPTU at three sites in Nanjing, China were collected and compared with the laboratory thermal needle tests. The results indicated that the thermal conductivities obtained using T-CPTU were accurate and closer to those of laboratory thermal needle tests for most soils. The thermal conductivities of the undisturbed soil samples measured in the laboratory were lower than those obtained by T-CPTU.
| Item Type: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||
| SWORD Depositor: | Library Publications Router | ||||||
| Journal or Publication Title: | Canadian Geotechnical Journal | ||||||
| Publisher: | Canadian Science Publishing | ||||||
| ISSN: | 1208-6010 | ||||||
| Official Date: | 12 July 2021 | ||||||
| Dates: |
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| Volume: | 59 | ||||||
| Number: | 4 | ||||||
| Page Range: | pp. 510-525 | ||||||
| DOI: | 10.1139/cgj-2021-0034 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||
| Copyright Holders: | © 2021 The Author(s). Permission for reuse (free in most cases) can be obtained from copyright.com. |
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