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Unformatted text preview: 18 E Rated Hammer Energy Per Blow (ft-lb) W P Weight of Pile plus Driving Appurtenances (lb) W r Weight of Hammer Ram (lb) s Pile Set (in/blow) e Coefficient of Restitution FDOT The Florida Department of Transportation under specification 455-3.3 (1991) recommends the following bearing formula (FDOT, 1991). P S E R 01 . 1 . 2 + + = (3-5) where R Safe Bearing Value in Tons P Weight of Pile as Driven, in Tons S Average Penetration per Blow, in Inches E Energy per Blow of Hammer, in Foot-Tons The last formula was used for concrete piles, composite concrete-steel piles and steel piles. The bearing capacity obtained using the latter FDOT approach either coincided or exceed the design capacity (suggested FS = 1.0)....
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- Spring '11
- Deep foundation, Allowable Pile Load