Abstract
Accurate prediction of uplift pile displacement is necessary to ensure appropriate structural and serviceability performance of civil projects. On the other hand, in recent years, machine-learning models have been applied to many geotechnical-engineering problems, with some degrees of success. The scope of this research includes three main stages: (1) the compilation of load–displacement data sets, obtained from the published literature, (2) analysis of machine learning models that predict the uplift pile displacement based on the cone penetration test data, and the relative importance of input parameters that have been evaluated using senility analysis by the artificial neural network, In addition, this paper also examines the different selection of input parameters and internal network parameters to obtain the optimum model, (3) A parametric study has also been performed for the input parameters to study the consistency of the suggested model. The statistical parameters and parametric study obtained in this research show the superiority of the current model. It is demonstrated that machine learning models such as ANN and GP models outperform the traditional methods, and provide accurate uplift pile displacement predictions.
Highlights
Pile foundations are used to transmit the superstructure load to deeper strata, when the subsurface soil is of inadequate strength
The scope of this research includes three main stages: (1) the compilation of load–displacement data sets, obtained from the published literature, (2) analysis of machine learning models that predict the uplift pile displacement based on the cone penetration test data, and the relative importance of input parameters that have been evaluated using senility analysis by the artificial neural network, In addition, this paper examines the different selection of input parameters and internal network parameters to obtain the optimum model, (3) A parametric study has been performed for the input parameters to study the consistency of the suggested model
On the other the hand, the tensile strength of soil is quite small in comparison to its shear strength and it can be safely neglected for a conservative estimate of uplift pile displacement
Summary
Pile foundations are used to transmit the superstructure load to deeper strata, when the subsurface soil is of inadequate strength. Pile foundations are often subjected to axial and lateral loads. Under the action of lateral loads and moments, some of the piles in a group, may experience uplift displacement. The tip resistance of piles plays a major role in pile capacity. In contrast to the compressive loading situation, the shaft resistance capacity alone works against the piles uplift force. On the other the hand, the tensile strength of soil is quite small in comparison to its shear strength and it can be safely neglected for a conservative estimate of uplift pile displacement
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