126_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011

126_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011 - o...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
DF12 Static Analysis Based on insitu Measurements: CPT o CPT measures end bearing and side shear directly o Penetration is quasi·static, not dynamic - not a good pile model o several methods including LPC program and Schmertmann/Noltingham method o limited by penetration capability, piles usually driven into strong soil SPT o dynamic insertion of sampler is model pile, good basis for correlation o does not separate end bearing and side shear o bearing on sampler dominates in sand and Side shear dominates in clays o possible to guess approximate ratio of side shear to end bearing based on soil type o several methods, FDOT Bulletin 121-A by Schmertmann (1967) calibrated against static load tests www.bsi-web.ce.ufl.edu) o program from FDOT Bulletin 121-B by Nottingham and Renfro (1967) o program updated by McVay, et al. at (1994) o 'Pil8' capacili' based 0 G
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: o side shear, f, vs. N and end bearing, q vs. N based on soil type and pile type (concrete, H-pile, steel pipe pile) o N < 5 assigned N = 0, N > 60 assigned N = 60 o method based on <:: N 60 (safety hammer), program will correct tor automatic hammer, must correct for other hammer energy efficiencies o P u = Os + Or W 2,----,------,-----DESIGN CHART - CONCRETE PILES ULTIMATE UNIT SIDE FRIcnON 5On. Tvn . . Mft Lbo'*'_ .."'? n.",. 5 ... ........... ! ............................. ! so,------,--------,-------, DESIGN CHART - CONCRETE PILES MOBlLIZED UNIT END BEARING , OIL TYPE 2. 5. ...a.,. 1<th,5Qb" \'''7U1J' ~,---------:---, , , 50IL nn" a... '-II , , ,---------.--, , , , , , ,----------~~~~~~-~-~-~-~:-----__l , , , , , , , , , , , I IL TYn:-u.ft~ ... VIf'J st.,. Is. .. I , , , , o 5!-----;;2~5----:C 45 ,.....-.,.-. ..J SPT BLOWCOUNTS, N ~ ~ Z a 1,5 B [E w " in ... Z => ~ F 05-~ . =>...
View Full Document

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.

Ask a homework question - tutors are online