sma04 - Effective Stress Soil loaded by an applied weight W...

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Effective Stress
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W W Soil loaded by an applied weight W Soil loaded by water weighing W
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W W Soil loaded by an applied weight W Soil loaded by water weighing W Compression No deformation
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σ v Vertical Stress Vertical Force Cross Sectional Area = = (1) Definition of Total and Effective Stress
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σ v Vertical Stress Vertical Force Cross Sectional Area = = v v w u ' = - (1) (2) Definition of Total and Effective Stress Effective vertical stress
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σ v Vertical Stress Vertical Force Cross Sectional Area = = v v w u ' = - (1) (2) Definition of Total and Effective Stress Effective vertical stress ∆ σ v u w ∆ σ v ´ Case (a) W A 0 W A
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σ v Vertical Stress Vertical Force Cross Sectional Area = = v v w u ' = - (1) (2) Definition of Total and Effective Stress Effective vertical stress ∆σ v u w ∆σ v ´ Case (a) W A 0 W A Case (b) W A W A 0
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Fig 2 Two Pieces of Rock in Contact N T Water pressure u w Effective Stress
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N T Water pressure u w Effective Force ′ = - N N U (3a) Effective Stress U = u w ( A - A c )
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N T Water pressure u w Effective Force ′ = - N N U (3a) Effective Stress U = u w ( A - A c ) Frictional Failure T N = μ
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N T Water pressure u w Effective Force ′ = - N N U (3a) Effective Stress U = u w ( A - A c ) Frictional Failure T N = μ Failure in terms of stress τ μσ = v (3b) T A N A U A = - μ
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Layer 2 Layer 3 d 1 d 2 d 3 γ
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This note was uploaded on 08/30/2011 for the course CIVL 2410 taught by Professor Dairey during the Three '11 term at University of Sydney.

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sma04 - Effective Stress Soil loaded by an applied weight W...

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