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Geotechnical Eng
Quiz 1 Information
23
Civil Engineering
06/09/2011
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Cards

Term
Void Ratio
 Definition
e = Vv/Vs
Term
Porosity
 Definition
n = Vv/V
Term
Degree of Saturation
 Definition
S = Vw/Vv
Term
Specific Gravity of Solids
 Definition
Gs = [Ws/(Vs*γw)]
Term
Water Content
 Definition
ω = Ww/Ws
Term
Air Content
 Definition
A = Va/V
Term

Is it possible to have a void ratio greater than 1?

( e > 1)

 Definition
Yes, it is possible
Term
Variation of Void Ratio Equation
 Definition
e = n/(1 - n)
Term
Varition of Porosity Equation
 Definition
n = e/(1 + e)
Term

Is it possible to have a porosity greater than 1?

(n > 1)

 Definition

No, it is not possible. n < 1, because the volume of voids will always be less than the total volume.

 

( n = Vv/V )
Term
What are the allowable ranges for the Degree of Saturation?
 Definition

0% ≤ S ≤ 100%

OR

( 0 ≤ S ≤ 1 )
Term
S = 0 or 0%
 Definition
Dry Soil
Term
S = 1 or 100%
 Definition
(Fully) Saturated Soil
Term

0% < S < 100%

OR

( 0 < S < 1 )

 Definition
Partially Saturated Soil
Term
Vs
 Definition
Volume of Solids
Term
Vw
 Definition
Volume of Water
Term
Va
 Definition
Volume of Air
Term
Vv
 Definition

Volume of Voids

 

( Vv = Vw + Va )
Term
V
 Definition

Total Volume

 

( V = Vv+Vs = Va+Vw+Vs )
Term
Ws
 Definition
Weight of Solids
Term
Ww
 Definition
Weight of Water
Term
Wa
 Definition

Weight of Air

 

( Wa=0 )
Term
W
 Definition

Total Weight

 

( W = Ww+Ws )