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Unformatted text preview: Q", expressed as Q = WRh II S+C (8.99) where W R = weight of the ram (for example, see Table 8.6) h = height of fall of the ram S = penetration of pile per hammer blow C = a constant The pile penetration, S, is usually based on the average value obtained from the last few driving blows. In the equation's original fonn, the following values of C were recommended. For drop hammers: C = 0.1 inch (if the units of Sand h are in inches) For steam hammers: C = 1.0 inch (if the units ofS and II are in inches) Also, a factor of safety, FS = 6, was recommended to estimate the allowable pile capacity. Note that, for single and doubleacting hammers, the term WRh can be replaced by EH s (where E = hammer efficiency and HE = rated energy of hammer). Thus (8.100)...
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This note was uploaded on 02/10/2012 for the course CEG 4012 taught by Professor Staff during the Fall '08 term at University of Florida.
 Fall '08
 Staff

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