Numerical Analysis of Installation Performance and Uplift Bearing Capacity of Helical Piles in Clay

Abstract Helical piles are widely used for their low installation noise, low disturbance, recyclability, and increased load-bearing capacity. This study investigated the effects of installing multiple-plate helical piles on the surrounding soil using the coupled Eulerian–Lagrangian finite-element me...

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Bibliographic Details
Published in:International journal of geomechanics 2025-02, Vol.25 (2)
Main Authors: Zhang, Liting, Zhou, Hang, Xu, Wenhan, Chen, Yong
Format: Article
Language:English
Subjects:
Bearing capacity
Diameters
Finite element method
Limit analysis
Load bearing elements
Mathematical analysis
Mathematical models
Numerical analysis
Numerical models
Parameters
Penetration depth
Piles
Plastic deformation
Recyclability
Soil
Soil bearing capacity
Soil investigations
Soil strength
Soils
Technical Papers
Uplift
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Summary:Abstract Helical piles are widely used for their low installation noise, low disturbance, recyclability, and increased load-bearing capacity. This study investigated the effects of installing multiple-plate helical piles on the surrounding soil using the coupled Eulerian–Lagrangian finite-element method. The comprehensive parametric study was carried out using the advancement ratio, the spacing ratio, the ratio of helix plate diameter to shaft diameter, the embedment depth ratio, and the soil strain softening parameters. The influence on the uplift capacity was then investigated by mapping the remolded soil strength field, derived from the coupled Eulerian–Lagrangian computation, into a numerical model for finite-element limit analysis. The results reveals that the penetration of single- and multiple-plate helical piles affects the soil strength in a cylindrical region with a radius of 0.7 times the helix plate diameter and a height of the penetration depth surrounding the pile. Although strain softening parameters have a significant impact on soil strength, they do not alter the range of soil strength disturbance. The impact of embedment depth ratio on uplift bearing capacity is most notably significant.
ISSN:1532-3641
1943-5622
DOI:10.1061/IJGNAI.GMENG-10565