A Study on the Vertical Bearing Characteristics of Screw Piles in Permafrost Regions
The screw piles used in permafrost regions represent a new type of pile, and their vertical bearing characteristics play a crucial role in ensuring the normal operation of engineering buildings. This study establishes a numerical calculation model to simulate the interaction between screw piles and...
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MDPI AG
2025-07-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/15/13/7416 |
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| author | Tao Liu Jun Lv Xuyan Deng Chunxiang Guo Weijia Zhang Daijun Jiang |
| author_facet | Tao Liu Jun Lv Xuyan Deng Chunxiang Guo Weijia Zhang Daijun Jiang |
| author_sort | Tao Liu |
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| description | The screw piles used in permafrost regions represent a new type of pile, and their vertical bearing characteristics play a crucial role in ensuring the normal operation of engineering buildings. This study establishes a numerical calculation model to simulate the interaction between screw piles and soil in permafrost regions and verifies the numerical simulation results through model tests. The bearing mechanism of screw piles in permafrost areas is studied and compared with common, bored, cast-in-place piles widely used. Finally, a method for estimating the bearing capacity of screw piles in permafrost regions is proposed. The research indicates that approximately 90% of the bearing capacity of screw piles in permafrost regions is derived from the mechanical interaction between the concrete pile’s side and the permafrost soil. The shear strength of the permafrost is the primary determinant of the pile foundation’s bearing capacity, while the seasonally active layer has a minimal impact on its bearing capacity, resulting in a stable year-round performance. In permafrost regions, the equivalent friction resistance of screw piles is significantly greater than that of the conventional cast-in-place piles. When the pile reaches its ultimate bearing capacity, the plastic zone on the pile’s side becomes connected, and shear failure occurs in the surrounding soil. The design value of the bearing capacity of a single pile can be effectively estimated in engineering practice by improving the formula of the code for calculating the vertical bearing capacity. |
| format | Article |
| id | doaj-art-2f853f1a5ce1439da31284c9b4997257 |
| institution | DOAJ |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
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| spelling | doaj-art-2f853f1a5ce1439da31284c9b49972572025-08-20T03:16:43ZengMDPI AGApplied Sciences2076-34172025-07-011513741610.3390/app15137416A Study on the Vertical Bearing Characteristics of Screw Piles in Permafrost RegionsTao Liu0Jun Lv1Xuyan Deng2Chunxiang Guo3Weijia Zhang4Daijun Jiang5Power China Guiyang Engineering Corporation Limited, Guiyang 550081, ChinaPower China Guiyang Engineering Corporation Limited, Guiyang 550081, ChinaPower China Engineering Corporation of Southwest Headquarters, Chengdu 610036, ChinaSchool of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, ChinaSchool of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, ChinaSchool of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, ChinaThe screw piles used in permafrost regions represent a new type of pile, and their vertical bearing characteristics play a crucial role in ensuring the normal operation of engineering buildings. This study establishes a numerical calculation model to simulate the interaction between screw piles and soil in permafrost regions and verifies the numerical simulation results through model tests. The bearing mechanism of screw piles in permafrost areas is studied and compared with common, bored, cast-in-place piles widely used. Finally, a method for estimating the bearing capacity of screw piles in permafrost regions is proposed. The research indicates that approximately 90% of the bearing capacity of screw piles in permafrost regions is derived from the mechanical interaction between the concrete pile’s side and the permafrost soil. The shear strength of the permafrost is the primary determinant of the pile foundation’s bearing capacity, while the seasonally active layer has a minimal impact on its bearing capacity, resulting in a stable year-round performance. In permafrost regions, the equivalent friction resistance of screw piles is significantly greater than that of the conventional cast-in-place piles. When the pile reaches its ultimate bearing capacity, the plastic zone on the pile’s side becomes connected, and shear failure occurs in the surrounding soil. The design value of the bearing capacity of a single pile can be effectively estimated in engineering practice by improving the formula of the code for calculating the vertical bearing capacity.https://www.mdpi.com/2076-3417/15/13/7416permafrostscrew pilevertical bearing characteristicsmodel testnumerical simulation |
| spellingShingle | Tao Liu Jun Lv Xuyan Deng Chunxiang Guo Weijia Zhang Daijun Jiang A Study on the Vertical Bearing Characteristics of Screw Piles in Permafrost Regions Applied Sciences permafrost screw pile vertical bearing characteristics model test numerical simulation |
| title | A Study on the Vertical Bearing Characteristics of Screw Piles in Permafrost Regions |
| title_full | A Study on the Vertical Bearing Characteristics of Screw Piles in Permafrost Regions |
| title_fullStr | A Study on the Vertical Bearing Characteristics of Screw Piles in Permafrost Regions |
| title_full_unstemmed | A Study on the Vertical Bearing Characteristics of Screw Piles in Permafrost Regions |
| title_short | A Study on the Vertical Bearing Characteristics of Screw Piles in Permafrost Regions |
| title_sort | study on the vertical bearing characteristics of screw piles in permafrost regions |
| topic | permafrost screw pile vertical bearing characteristics model test numerical simulation |
| url | https://www.mdpi.com/2076-3417/15/13/7416 |
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