Lecture 7

# Lecture 7 - 21 OC Magnitude of Consolidation C...

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ρ 22 Highly Over-consolidated (HOC): Since σ ' F does not exceed σ ' C : ( ) + - = - = - - = = 0 V 0 R 0 F R 0 F R 0 F σ ' Δσ σ ' log C σ ' σ ' log C σ ' log σ ' log C ) e - (e Δ e And as before: C 0 ρ e 1 H Δ e Δ H = + - = Therefore: + + = 0 V 0 0 R C σ ' Δσ σ ' log e 1 H C ρ (HOC) C R is typically 10-20% of C C ( σ ' 0 + Δσ V ) σ C Reload with Slope C R (= Recompression index) Virgin Curve with Slope C C (= Compression index) e 0 e F σ 0 Δ e Void Ratio, e Log Vertical Effective Stress, σ V Initial Insitu State Δσ V σ C σ F
ρ 23 Lightly Over-consolidated (LOC): Consolidation occurs in two steps: 1) Δ e 1 along the reload curve to σ ' C Δ H 1 2) Δ e 2 along the virgin curve to σ ' F Δ H 2 step 1: ( ) - = - = - - = 0 C R 0 C R 0 C R 1 σ ' σ ' log C σ ' σ ' log C σ ' log σ ' log C Δ e + = = + - = 0 C 0 R C1 0 1 1 σ ' σ ' log e 1 H C ρ e 1 H Δ e Δ H step 2: ( ) Δ + - = -

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## This note was uploaded on 09/12/2011 for the course CEG 4012 taught by Professor Staff during the Fall '08 term at University of Florida.

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Lecture 7 - 21 OC Magnitude of Consolidation C...

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