Symbol
Designation
i
Gradient of groundwater pressures in
underseepage analysis.
K+A,
Coefficient of active earth pressures.
K+p,
Coefficient of passive earth
pressures.
K+v,
Modulus of subgrade reaction for
bearing plate or foundation of width
b.
K+v*,
Modulus of subgrade reaction for 1 ft
square bearing plate at ground
surface.
k
Coefficient of permeability in
general.
k+H,
Coefficient of permeability in
horizontal direction.
k+m,
Mean coefficient of permeability of
anisotropic subsoil.
ksf
Kips per sq ft pressure intensity.
ksi
Kips per sq in pressure intensity.
k+V,
Coefficient of permeability in
vertical direction.
L,1
Length in general or longest dimension
of foundation unit.
LI
Liquidity index.
LL
Liquid limit.
m+v,
Coefficient of volume compressibility
in consolidation test.
n
Porosity of soil sample.
n+d,
Number of equipotential drops in flow
net analysis of underseepage.
n+e,
Effective porosity, percent by volume
of water drainable by gravity in
total volume of soil sample.
n+f,
Number of flow paths in flow net
analysis of underseepage.
OMC
Optimum moisture content of compacted
soil.
P+A,
Resultant active earth force.
P+AH,
Component of resultant active force in
horizontal direction.
pcf
Density in pounds per cubic foot.
P+c,
Preconsolidation stress.
P+h,
Resultant horizontal earth force.
P+o,
Existing effective overburden pressure
acting at a specific height in the
soil profile or on a soil sample.
PI
Plasticity index.
PL
Plastic limit.
P+P,
Resultant passive earth force.
P+PH,
Component of resultant passive earth
force in horizontal direction.
P+v,
Resultant vertical earth force.
P+w,
Resultant force of water pressure.
p
Intensity of applied load.
q
Intensity of vertical load applied to
foundation unit.
q+u,
Unconfined compressive strength of
soil sample.
q+ult,
Ultimate bearing capacity that causes
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