154_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011

154_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011 - a...

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DF36 Negative Skin Friction o what happens it soil settles around pile? - side shear reverses direction and loads pile (instead of supporting itl) o maximum load on pile is the (negative) side shear capacity in zone of settlement Bridge Deck - ~ 0 analysis is tedious and inexact, but not difficult o determine limits of zone of settlement o conservatively remove all side shear capacity in this zone o add the removed side shear capacity as
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Unformatted text preview: a load on pile o determine capacity required below bottom of settlement zone (the "neutral plane") o if capacity insufficient, pile will move downward until it is o best to avoid "NSF" by driving piles after fill is placed, using lightweight fill, or by using bond breakers or casings through the settlement zone...
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