Shear Load Transfer Characteristics of Drilled Shafts in Weathered Rocks
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 125, Issue 11
Abstract
The load distribution and deformation of drilled shafts subjected to axial loads were evaluated by a load-transfer approach. The emphasis was on quantifying the load-transfer mechanism at the interface between the shafts and surrounding highly weathered rocks based on a numerical analysis and on small-scale tension load tests performed on nine instrumented piles. An analytical method that takes into account the soil coupling effect was developed using a modified Mindlin's point load solution. Based on the analysis, a single-modified hyperbolic model is proposed for the shear transfer function of drilled shafts in highly weathered rocks. Through comparisons with field case studies, it is found that the prediction by the present approach is in good agreement with the general trend observed by in situ measurements, and thus represents a significant improvement in the prediction of load deflections of drilled shafts.
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Information & Authors
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 125 • Issue 11 • November 1999
Pages: 999 - 1010
History
Received: Apr 10, 1998
Published online: Nov 1, 1999
Published in print: Nov 1999
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