Model Setup

Geometry type

Unit system

Dimensions

Slope height (m)

Slope ratio (1:n)

Crest length (m)

Toe length (m)

Depth below toe (m)

Thickness Y (m)

Tunnel radius (m)

Center depth (m)

Below invert (m)

Span X (m)

Excavation stages

Footing width (m)

Soil depth (m)

Footing center X (m)

Soil length X (m)

Fill height (m)

Crest half-width (m)

Side slope (1:n)

Soil depth (m)

Extra side (m)

Length X (m)

Depth Z (m)

Mesh density

Zones X

Zones Y

Zones Z

Materials

Name	Group	Model	E	ν	c	φ	ψ	σt	ρ	Extra

Materials are assigned to model groups. Set at least one material per active group.

Boundary Conditions

Fix bottom (z)

Fix sides X (x)

Fix sides Y (y)

Surface Load

Apply surface pressure

Pressure (kPa)

Face

X start (m)

X end (m)

For foundations the load is applied to the top surface over the region X0–X1. Excavation zones for tunnels are removed automatically.

Structural Elements

Axial elements (rock bolts, piles) attached to the mesh nodes. They carry axial force and yield at a limit force.

Type

E (kPa)

Area A (m²)

Yield force (kN)

X start (m)

X end (m)

Spacing (m)

Length (m)

Rebuild the model (Generate Model) to apply changes.

Solver

Constitutive model

Local damping α

Max steps

Convergence tolerance

Load ramp (steps)

Geostatic K0 initial stress

Transient seepage (effective stress)

Two-way Biot coupling (volumetric)

Hydrostatic initial pore pressure

Dynamic analysis (seismic)

Large-strain (updated Lagrangian)

Thermal coupling (Fourier + strain)

FISH script

Null zones (comma-separated ids)

Factor of Safety

Strength Reduction Method - reduces c and tan(φ) until the model fails. Runs multiple solves; may take a while.

FOS tolerance

FOS max steps

FOS trial tolerance

Non-matching Interface (Mortar)

Couple two grids that meet at a stair / non-conforming interface: a coarse MASTER (host) and a finer SLAVE whose interface nodes do not coincide with the master face. The slave internal force is returned to the master (Newton's 3rd law) and the slave interface nodes are kinematically tied to the master - so the stair mesh stays stable where a naive 1-to-1 tie explodes.

Cross-section (shared)

Length X (m)

Thickness Y (m)

Interface Z (m)

Master grid (coarse, host)

Height Z (m)

Zones X

Zones Y

Zones Z

Slave grid (fine, dangling nodes)

Height Z (m)

Zones X

Zones Y

Zones Z

Materials

Boundary condition

Mode

Solver

Constitutive model

Local damping α

Max steps

Convergence tolerance

The slave must be finer and meet the master at Interface Z. Mortar links are auto-generated by projecting each slave bottom node onto the master top edge at the same Y.

Ratio: — Steps: 0 Zones: 0 Tetrahedra: 0 dt: — FOS: —

Results

Contour field

Deformation scale

×0

Slices

Slice X0%

Slice Y0%

Slice Z0%

Wireframe

Vectors

Mortar links

Compression positive

History

Run a solve to populate the history plot.

CSV reflects the current field & slice filters.

Legend

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