a _v

Coefficient of compressibility

c _v

Coefficient of consolidation

C _c

Compression index

C _r

Recompression index

C _{c ?}

Modified compression index

C _{r ?}

Modified recompression index

C _?

Secondary compression ratio

% C

Percent collapse

CP

Collapse potential

d

Distance as shown in Fig. 6.13

d ₀

Initial dial reading prior to inundation for collapse test

d _F

Final dial reading at end of inundation for collapse test

e

Void ratio

e ₀

Initial void ratio

? e

Change in void ratio

G _s

Specific gravity of soil solids

h ₀

Height of soil specimen

H

Thickness of soil layer

H _dr

Height of drainage path

H ₀

Initial thickness of in situ soil layer

? h

Change in height of soil specimen

i

Hydraulic gradient

k

Coefficient of permeability, also known as hydraulic conductivity

OCR

Overconsolidation ratio

s _c

Primary consolidation settlement

s _i

Initial settlement, also known as immediate settlement

s _s

Settlement due to secondary compression

s _t

Settlement at any given time

t

Time

T

Time factor

u _e

Excess pore water pressure

U _avg

Average degree of consolidation settlement

v

Superficial velocity, i.e., velocity of flow of water into or out of soil

V _v

Volume of voids

V _s

Volume of soil solids

w

Water content (also known as moisture content)

z

Vertical height to the nearest drainage boundary

?

Maximum differential settlement of foundation

? _v

Vertical strain