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122_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011

122_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011 -...

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DF14 o no bearing correction if the overlying layer is stronger than the bearing layer o if DA < Dc and overlying layer is weaker than the bearing layer. then the unit bearing is interpolated as follows: q = q LC + ~: (qr - q LC) where q = corrected unit end bearing at pile tip qLC = unit end bearing at layer change qT = uncorrected unit end bearing at pile tip DA = actual embedment in bearing layer Dc = critical depth of embedment o side shear is calculated for each N value and integrated along the length of the pile o side shear in bearing layer is corrected when the overlying layer is weaker o if DA < Dc and overlying layer is weaker than bearing layer then the side shear (force) is corrected as follows: SFBL[ DA ] CSFBL= qLc+-(qr-qLc) q,. 2Dc where CSFBL = corrected side shear (force) in the bearing layer SFBL = uncorrected side shear (force) in the bearing layer qT, qLC. DA, Dc as previously defined o if DA ~ Dc and overlying layer is weakerthan bearing layer then the side shear (force) above Dc is corrected as follows: CSFACD = USFACD [
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