Volume 39 Issue 4
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Article Navigation >  GEOTECHNICAL ENGINEERING TECHNIQUE  > 2025  >  39(4): 617-623
Li Zhigang, Li Yang, Wang Xiaofeng, Chai Xiandong, Ren Gang, Chang Honglin, Deng Tianyao. Compressive bearing performance of the helical pile embedded in silty clay[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(4): 617-623. doi: 10.20265/j.cnki.issn.1007-2993.2024-0127
Citation: Li Zhigang, Li Yang, Wang Xiaofeng, Chai Xiandong, Ren Gang, Chang Honglin, Deng Tianyao. Compressive bearing performance of the helical pile embedded in silty clay[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(4): 617-623. doi: 10.20265/j.cnki.issn.1007-2993.2024-0127
shu

Compressive bearing performance of the helical pile embedded in silty clay

doi: 10.20265/j.cnki.issn.1007-2993.2024-0127
  • 1.

    State Grid Fuyang Power Supply Company, Fuyang 236017, Anhui, China

  • 2.

    Anhui Huadian Engineering Consultating and Design Co., Ltd., Hefei 230022, Anhui, China

  • 3.

    Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210024, Jiangsu, China

  • Received Date: 2024-03-21
  • Accepted Date: 2024-08-29
  • Rev Recd Date: 2024-05-12
  • Publish Date: 2025-08-08
    Abstract
  • The helical pile has advantages such as simple structure, convenient construction, and environmental friendliness, and is gradually being applied to the foundation of transmission line towers. Field tests on compressive bearing capacity of helical pile in silty clay foundation were carried out, and the applicability of different determination methods for ultimate bearing capacity was discussed. A three-dimensional model of the helical pile and soil was established using the finite element software ABAQUS. The axial force and lateral frictional resistance of the helical pile, and soil failure mode under vertical compression load were studied. The load sharing ratio of anchor rod and anchor plates under ultimate state was comparatively analyzed through code-based calculation and numerical simulation. The research results show that under vertical compression load, the load-displacement curve of the helical pile exhibits a typical linear-highly nonlinear-approximate linear trend. The lg P-s method and Reese & O’Neill method can be used to assist in determining the ultimate compressive bearing capacity. The upper region of anchor plate exhibits less lateral frictional resistance from the anchor rod, the vertical compression load is mainly resisted through the end resistance of the anchor plate and the lateral friction resistance of the anchor rod between anchor plates. Under ultimate load, soil displacement occurs through three anchor plates to form a relatively complete cylindrical slip surface. The maximum stress and plastic strain of soil under the bottom plate occur first, leading to shear failure. Under ultimate conditions, the load distribution among different parts of the helical pile is as follows: bottom plate > middle plate > top plate > anchor rod. The anchor plates collectively bear around 85% of the load.

     

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