A Study on the Increase in Load Capacity of Driven Pile Over Time or 'Set-Up'

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Date
2008
Authors
Selamat, Prof. Dr. Mohamad Razip
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Abstract
Cone Penetration Test (CPT) is commonly used in characterising soil parameters and geotechnical engineering application. Due to its similarity of insertion to pile installation, the cone data has been used to predict pile bearing capacity widely. This study focuses on CPT data used to predict pile side shear friction. Furthennore, it is also proposed to estimate the soil/pile set-up parameter such as the increased shaft capacity with time. The study consist a set of model piles which designated to simulate the actual pile driving mechanisms. The model pile has size similar to CPT in order to eliminate the size factor. CPT data such as tip resistance, qc and sleeve friction (fi) are used to predict the side shear friction of model pile and further compared to the actual tested capacity. Besides that, an indirect approach is proposed to find the soil/pile set-up parameters by sensitivity parameter surveyed by CPT. Findings of the study shown some new factors or friction coefficient of CPT method in estimation pile capacity is proposed for this particular side. that the factors such as empirical or semi-empirical will justify the suitability ofCPT fonnula to predict pile capacity and soil/pile set-up parameter.
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Civil Engineering
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