Table 9

Measured and back-analysed skin frictions

DescriptionRelationshipWhen to use
Measured, robustτm = 0·42 × UCS1/2This relationship is proven and robust and may be used as default on Dubai projects.
Back-analysedτult = 0·54 × UCS1/2Before implementation, this relationship should be proven through PTP(s) loaded to geotechnical failure as defined in the section headed ‘Definition of geotechnical failure’.

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