Adding a Correlation

More than 140 equations are implemented in this version of NovoFORMULA. However, its database is expandable and can grow by adding new equations. User can add new formula by clicking on Tools⏵Add New Formula menu. This will show the screenshot on the left below:

In order to add an equation, NovoFORMULA's standard parameters should be used. For example the equation γw=γd(1+w) defines the relation between bulk and dry density using moisture content. This equation is stored as gwet=gdry*(1+w/100) in NovoFORMULA's database. A list of soil parameters defined in NovoFORMULA can be accessed via View⏵List of Soil Parameters menu, also listed below:

Symbol	Description	Unit (Metric)	Unit (Imperial)	Format
Cc_	Coefficient of Curvature (Sieve Test)			N2
Cu_	Uniformity Coefficient (Sieve Test)			N2
Cc	Consolidation Compression Index			N3
Cs	Consolidation Recompression Index			N3
Cv	Coefficient of Consolidation	m2/sec	ft2/sec	E3
Su	Undrained Shear Strength	kPa	psf	N1
Dr	Relative Density	%	%	N1
Es	Modulus of Elasticity of Soil	kPa	psf	N1
Er	Resilient Modulus of Soil	MPa	ksf	N1
Ed	Modulus of Deformation of Rock	GPa	1000ksf	N1
Phi	Friction Angle	deg	deg	N1
Ks	Modulus of Subgrade Reaction	kN/m3	pcf	N1
Vs	Shear Wave Velocity	m/s	ft/s	N1
Gmax	Shear Modulus	kPa	psf	N1
mv	Constraint Modulus	1/kPa	1/psf	E3
LL	Liquid Limit	%	%	N1
PL	Plastic Limit	%	%	N1
IP	Plastic Index	%	%	N1
LI	Liquid Index	%	%	N1
w	Moisture Content	%	%	N1
mu	Poisson Ratio			N2
e	Void Ratio			N2
Gs	Specific Gravity			N2
gsat	Saturated Unit Weight	kN/m3	pcf	N2
gdry	Dry Unit Weight	kN/m3	pcf	N2
gwet	Wet Unit Weight	kN/m3	pcf	N2
F	Percent fine-grained (clay & silt)	%	%	N1
Fc	Percent clay	%	%	N1
OCR	Over-consolidation Ratio			N2
Svt	Total Overburden Stress	kPa	psf	N2
Sve	Effective Overburden Stress	kPa	psf	N2
K	Coefficient of Permeability	cm/sec	in/sec	E3
D10	Effective Particle Diameter	mm	mm	N3
D30	30% Passing Diameter	mm	mm	N3
D50	Mean Particle Diameter	mm	mm	N3
D60	60% Passing Diameter	mm	mm	N3
CBRs	Subgrade CBR	%	%	N2
CBRb	Base Course CBR	%	%	N2
Pc	Preconsolidation Stress	kPa	psf	N2
S	Degree of Saturation	%	%	N1
n	Porosity			N2
Mv	Coefficient of Compressibility			E3
Ka	Coeff. of Active Earth Pressure			N3
Kp	Coeff. of Passive Earth Pressure			N3
Ko	Coeff. of At-rest Earth Pressure			N3
KD	Dilatometer Parameter			N2
RMR	Rock Mass Rating	%	%	N1
Tv	Time Factor-Consolidation			N3
Hdr	Drainage Thickness of the Layer-Consolidation	m	ft	N2
t	Time	sec	sec	N1
U	Degree of Saturation	%	%	N1
Ac	Clay Activity			N1
Sp	Swelling Potential			N1