A complete list of the D-Flow Slide material parameters
Symbol | Description | Unit | Global method | Detailed method | Advanced check liquefaction (SLIQ2D) | Advanced check breach flow (HMBreach) |
---|---|---|---|---|---|---|
Ced | Parameter defined in equation: εvoldm0 = 0.001 exp[(ID1 – ID) / Ced] | [-] | x | |||
D50 | Median grain size = grain diameter for which half the sample is smaller and half is larger | [μm] | x | x | ||
D15 | Grain diameter for which 15% of the sample is finer | [μm] | x | |||
Dr | Relative density on the basis of n: Dr = Rn = (nmax – n) / (nmax – nmin) | [-] | x | |||
E(x) | expected value of parameter x. | |||||
e | Void ratio: e = n / (1 – n) | [-] | (x) | x | ||
emax | Maximum e. | [-] | (x) | |||
emin | Minimum e. | [-] | (x) | |||
f(s) | Form of the dilatation curve as a function of s: f(s) = εvold / εvoldm | [-] | x | |||
ID | Relative density on the basis of e: ID = Re = (emax – e) / (emax – emin) | [-] | (x) | x | ||
ID1 | Parameter defined in the following equation: εvoldm0 = 0.001 exp[(ID1 – ID) / Ced] | [-] | x | |||
Ks | Elastic modulus for isotropic unloading | [kN/m2] | x | |||
Ks0 | Value of Ks at average stress p’0 | [kN/m2] | x | |||
Ks01 | Parameter defined in the following equation: Ks0 = Ks01 + ∂Ks0 / ∂ID × ID | [kN/m2] | x | |||
m | Parameter describing f(s), defined in the following equation: f(s) = A.sm – B.sr / (smax – s) | [-] | x | |||
n | Porosity: n = e / (1 + e) | [-] | (x) | |||
nmax | Maximum value of n. | [-] | (x) | |||
nmin | Minimum value of n. | [-] | (x) | |||
p’ | Mean effective stress (or isotropic effective stress): p' = (σ'1 + σ'2 + σ'3) / 3 | [kN/m2] | x | |||
p’CON | Mean effective stress after consolidation. | [kN/m2] | x | |||
p’0 | Reference value for p’. | [kN/m2] | x | |||
q | Deviatoric stress (or equivalent shear stress): q = (s1 – s3) | [kN/m2] | x | |||
Re | Relative density on the basis of the void ratio: Re = ID = (e – emin)/(emax – emin) | [-] | (x) | (x) | ||
r | Parameter describing f(s), defined in the following equation: | [-] | x | |||
Sr | The degree of saturation of the soil (0 \< Sr \< 1). For sand (generally dry) Sr = 0 and for clay (generally completely saturated) Sr = 1. | [-] | (x) | x | ||
s | Relative shear strength: s = q / p' | [-] | x | |||
s2 | Value of s at maximum contraction | [-] | x | |||
smax | Maximum value of s. The value of smax matches the friction angle φ, through the following equation: smax = 6 sin φ/ (3 – sin φ) | [-] | x | |||
sm2 | sm2 = smax – s2 | [-] | x | |||
sm2-0 | Parameter defined in equation sm2 = smax – s2 = sm2-0 + ∂sm2 / ∂ID . ID | [-] | x | |||
u | Parameter describing the influence of p’ on Ks defined in equation: Ks = Ks0 . (p' / p0')u | [-] | x | |||
v | Parameter describing the influence of p’CON on evoldm, defined in equation: εvoldm = εvoldm0 . (pCON' / p0')v | [-] | x | |||
w | The water grade: The water grade: w = Sr . e . γw / γs | [-] | x | |||
εcor | Correction on the measured volumetric strain with respect to the membrane, defined by the following equation: | [-] | x | |||
εvol | Volumetric strain (defined as positive for compaction). | [-] | x | |||
εvolc | Volumetric strain by isotropic unloading. | [-] | x | |||
εvold | Dilation volumetric strain or volumetric strain by contraction (positive) and dilatation (negative). | [-] | x | |||
εvoldm | Maximum volumetric strain by contraction. | [-] | x | |||
εvoldm0 | Value of evoldm at mean effective stress p’0. | [-] | x | |||
σ(x) | Standard deviation of parameter x. |
| ||||
σ' | Normal effective stress. | [kN/m2] | ||||
σ’1, σ’2, σ’3 | Principal effective stresses. | [kN/m2] | x | |||
σ’h | Horizontal effective stress. | [kN/m2] | x | |||
φ | Friction angle. | [°] | x | x | ||
φmob | Mobilized friction angle. | [º] | x | |||
ψ5m | State parameter (Psi 5m), describes the state of the soil. |
|
| x | ||
γ | Submerged unit weight of sand: γ = (1 – n) . (γs – γw) | [kN/m3] | (x) | x | ||
γs | Unit weight of sand. | [kN/m3] | (x) | x | ||
γw | Unit weight of water. | [kN/m3] | (x) | x |
(x) not directly used in the model as an input parameter