Modeling Landslides with a Material Instability Criterion - Multiscale Geomechanics: From Soil to Engineering Projects - page 231

Soil parameters Symbols Units Blue clayey silt

kN/m 3 grain specific weight ρ s 27.40

initial tangent Young modulus E MPa 95.0

initial tangent Poisson ratio ν − 0.21

porosity n − 0.3

◦

initial friction angle ϕ c0 = ϕ e0 1.0

◦

friction angle at failure ϕ cf = ϕ ef 19.0

hardening parameter 1 B p − 0.01

10 −3 initial cohesion c 0 kPa

cohesion at failure c f kPa 171

hardening parameter 2 B c − 0.02

◦

dilatancy angle at failure ψ f 0

Table 8.2. Calibration parameters

1

0.8

0.6

0.4

0.2

experimental results
Van-Genuchten

0

0 2 4 6

10 10 10 10

p c (kPa)

Figure 8.9. Typical water retention curve of a clay [FLE 02] used for the Petacciato soil

Hydraulic parameters Symbols Units Clay

m 2 10 −17 intrinsic permeability k 0

residual saturation degree S r0 − 0.1

Pa −1 1.0 10 −5 first retention parameter α

second retention parameter β − 1.35

Table 8.3. Water retention parameters