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# PVD Consolidation Analysis Input File
# All units: m, kPa, years
# Soil layers (from top to bottom)
soil_layers:
- thickness: 5.0 # Layer thickness (m)
Cv: 0.5 # Vertical coefficient of consolidation (m²/year)
Ch: 1.5 # Horizontal coefficient of consolidation (m²/year)
RR: 0.05 # Recompression ratio
CR: 0.30 # Compression ratio
sigma_ini: 50.0 # Initial effective stress (kPa)
sigma_p: 80.0 # Preconsolidation pressure (kPa)
- thickness: 8.0
Cv: 0.3
Ch: 1.0
RR: 0.04
CR: 0.35
sigma_ini: 90.0
sigma_p: 90.0
- thickness: 7.0
Cv: 0.4
Ch: 1.2
RR: 0.045
CR: 0.32
sigma_ini: 140.0
sigma_p: 150.0
# PVD installation properties
pvd:
dw: 0.05 # Equivalent diameter of drain (m) - typically 50-100 mm
ds: 0.15 # Smear zone diameter (m) - typically 2-4 times dw
De:
1.5 # Equivalent diameter of unit cell (m)
# For triangular pattern: De = 1.05 × S
# For square pattern: De = 1.13 × S
# where S = drain spacing
L_drain:
20.0 # Total drain length (m)
# For two-way drainage: actual drain length
# For one-way drainage: 2 × actual drain length
kh: 2.0 # Horizontal permeability (m/year)
ks: 1.0 # Smear zone permeability (m/year) - typically 0.5-0.67 × kh
qw:
100.0 # Well discharge capacity (m³/year)
# For negligible well resistance, use very large value (1e12)
# Analysis parameters
analysis:
surcharge: 100.0 # Applied surcharge load (kPa)
dt: 0.01 # Time step for finite difference (years)
t_max: 20.0 # Maximum time for analysis (years)
n_points: 200 # Number of points in settlement vs time curve
# Time points to check in report (years)
t_check:
- 0.1
- 0.5
- 1.0
- 2.0
- 5.0
- 10.0
- 20.0
# Times to generate consolidation profiles (years)
t_profiles:
- 0.5
- 2.0
- 10.0
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