34_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011

34_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011 -...

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p17 NC Magnitude of Consolidation, pc: Normally consolidated (NC) clay (saturated) for NC Clay .... cr'o = de (or Pc) i.e. the present effective overburden pressure, a'o. is the maximum pressure that the soil has ever experienced, (j'C (or Pc) = preconsolidation pressure History of NC clay: ::- ijZ\\vZZS\ \ == Element of soil deposited at P Pressure increases with - continued deposition Water is squeezed out P Void ratio decreases (e=V,N,) External Load Applied Void Ratio, e / Nature deposits soil
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Unformatted text preview: (approx 10 yrs process) Virgin Curve with Slope F/I'JIIL IfH IT() STf\T At'1E.~ !-oAt AppelE;) a'o cr', = cr'o + !1(Jv From the e vs, log cr'v plot then: [-l:1e ) C --c -I:110gp--(e,-e o ) or: ( cr' +l:1cr' ) l:1e=(e,-eo)=-C c log cr'o v But this latter form is awkward since we are interested in settlement, not changes in void ratio, Unfortunately we will need to use some prior knowledge, I.e, "phase diagram" information....
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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.

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