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Unformatted text preview: adjusted CN = adjustment for effective overburden pressure p~ (kPa) computed [see Liao and Whitman (1986)]5 as eN = (9~~6r Factors 1); Country United States! Nonh America Japan United Kingdom China Hammer for 111 Average energy ratio E, Sampler correction 1b Remarks R-P = Rope-pulley or caIhead 'Ill = E,.IE". = E,/70 For U.S. lriplauto w/E, = 80 'Ill = 80/70 = 1.14 E rt X Nt = E r2 X N2 N is too high for L < 10 m Without liner 'Il3 = 1.00 With liner: Dense sand, clay = 0.80 Loose sand = 0.90 Borehole diameter correctiOD 1)4 Base value N is too high with liner Hole diameter:t 6O-l20mm ISOmm 200mm 'Il4 = 1.00 = LOS = US Base value; N is too small when there is an oversize hole DlIta synthesized from Riggs (1986). 8kemplOD (1986), Scbmertmann (19780) and Seed et at. (1985). t '14 . .. 1.00 for all diameter hollow-stem lIugers where 8FT is lllkCD through the stem....
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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