Prediction of the End-Bearing Capacity of Axially Loaded Piles in Saturated and Unsaturated Soils Based on the Stress Characteristics Method

Abstract This study proposed an analytical approach for predicting the end-bearing capacity of driven piles that are subjected to axial loads in saturated and unsaturated soils. This is a generalized approach in which the stress characteristic method is employed successfully for both saturated and u...

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Bibliographic Details
Published in:International journal of geomechanics 2023-07, Vol.23 (7)
Main Authors: Cheng, Xinting, Vanapalli, Sai K.
Format: Article
Language:English
Subjects:
Analytical methods
Axial loads
Bearing capacity
Driven piles
Finite difference method
Finite element method
Iterative methods
Load tests
Mathematical models
Model testing
Numerical prediction
Pile bearing capacities
Pile foundations
Pile load tests
Piles
Saturated soils
Soil
Soil stresses
Technical Papers
Unsaturated soils
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Summary:Abstract This study proposed an analytical approach for predicting the end-bearing capacity of driven piles that are subjected to axial loads in saturated and unsaturated soils. This is a generalized approach in which the stress characteristic method is employed successfully for both saturated and unsaturated soils. An iterative technique computer code was developed for the proposed analytical approach extending the finite difference method to develop solutions with the aid of MATLAB (version 2019a) that provides graphical output to visualize the results. The results from the proposed approach were compared against measurements for 13 pile load tests that include 11 in saturated soils and 2 in unsaturated soils, with good agreement. In addition, numerical analyses were performed using ABAQUS (version 6.14) to simulate the driven pile penetration and pile loading by employing the arbitrary Lagrangian–Eulerian adaptive mesh methods. The comparisons between the numerical predictions and measurements from a published model pile test suggested that the ultimate bearing capacity is well predicted by the finite-element model in comparison to the proposed analytical method. However, the proposed analytical method was simple for use in engineering practice applications to estimate the end-bearing capacity of pile foundations in both saturated and unsaturated soils.
ISSN:1532-3641
1943-5622
DOI:10.1061/IJGNAI.GMENG-7965