Soils and Foundations

Soils and Foundations

Volume 54, Issue 2, April 2014, Pages 233-242
Soils and Foundations

Predicting pile dynamic capacity via application of an evolutionary algorithm

https://doi.org/10.1016/j.sandf.2014.02.013Get rights and content
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Abstract

This study presents the development of a new model obtained from the correlation of dynamic input and SPT data with pile capacity. An evolutionary algorithm, gene expression programming (GEP), was used for modelling the correlation. The data used for model development comprised 24 cases obtained from existing literature. The modelling was carried out by dividing the data into two sets: a training set for model calibration and a validation set for verifying the generalization capability of the model. The performance of the model was evaluated by comparing its predictions of pile capacity with experimental data and with predictions of pile capacity by two commonly used traditional methods and the artificial neural networks (ANNs) model. It was found that the model performs well with a coefficient of determination, mean, standard deviation and probability density at 50% equivalent to 0.94, 1.08, 0.14, and 1.05, respectively, for the training set, and 0.96, 0.95, 0.13, and 0.93, respectively, for the validation set. The low values of the calculated mean squared error and mean absolute error indicated that the model is accurate in predicting pile capacity. The results of comparison also showed that the model predicted pile capacity more accurately than traditional methods including the ANNs model.

Keywords

Pile
Dynamic capacity
Gene expression programming
Training
Validation

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Peer review under responsibility of The Japanese Geotechnical Society.

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