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| DOI | 10.1007/s11629-023-8482-y |
| Thermal performance of cast-in-place piles with artificial ground freezing in permafrost regions | |
| 发表日期 | 2024 |
| ISSN | 1672-6316 |
| EISSN | 1993-0321 |
| 起始页码 | 21 |
| 结束页码 | 4 |
| 卷号 | 21期号:4 |
| 英文摘要 | During the construction of cast-in-place piles in warm permafrost, the heat carried by concrete and the cement hydration reaction can cause strong thermal disturbance to the surrounding permafrost. Since the bearing capacity of the pile is quite small before the full freeze-back, the quick refreezing of the native soils surrounding the cast-in-place pile has become the focus of the infrastructure construction in permafrost. To solve this problem, this paper innovatively puts forward the application of the artificial ground freezing (AGF) method at the end of the curing period of cast-in-place piles in permafrost. A field test on the AGF was conducted at the Beiluhe Observation and Research Station of Frozen Soil Engineering and Environment (34 degrees 51.2 ' N, 92 degrees 56.4 ' E) in the Qinghai Tibet Plateau (QTP), and then a 3-D numerical model was established to investigate the thermal performance of piles using AGF under different engineering conditions. Additionally, the long-term thermal performance of piles after the completion of AGF under different conditions was estimated. Field experiment results demonstrate that AGF is an effective method to reduce the refreezing time of the soil surrounding the piles constructed in permafrost terrain, with the ability to reduce the pile-soil interface temperatures to below the natural ground temperature within 3 days. Numerical results further prove that AGF still has a good cooling effect even under unfavorable engineering conditions such as high pouring temperature, large pile diameter, and large pile length. Consequently, the application of this method is meaningful to save the subsequent latency time and solve the problem of thermal disturbance in pile construction in permafrost. The research results are highly relevant for the spread of AGF technology and the rapid building of pile foundations in permafrost. |
| 英文关键词 | Permafrost engineering; Cast-in-place pile; Artificial ground freezing; Thermal performance |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| WOS记录号 | WOS:001234635800018 |
| 来源期刊 | JOURNAL OF MOUNTAIN SCIENCE
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/303603 |
| 作者单位 | Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS |
| 推荐引用方式 GB/T 7714 | . Thermal performance of cast-in-place piles with artificial ground freezing in permafrost regions[J],2024,21(4). |
| APA | (2024).Thermal performance of cast-in-place piles with artificial ground freezing in permafrost regions.JOURNAL OF MOUNTAIN SCIENCE,21(4). |
| MLA | "Thermal performance of cast-in-place piles with artificial ground freezing in permafrost regions".JOURNAL OF MOUNTAIN SCIENCE 21.4(2024). |
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