# 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