RockPlane NX

Stability verification of rock slopes subject to planar failure mechanism — single persistent discontinuity with daylighting (Hoek-Bray / RocPlane).

Open the app 5-minute quickstart

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In a nutshell

• What it does: Limit Equilibrium (LEM) verification of a planar rock wedge, with automatic computation of the NTC §6.6 design resistance for anchors, §6.7 for passive nails (SoilNail Variant A), Clouterre criterion for N-V interaction on passive nails, R1 drape meshes and R2 cable panels.
• For whom: geologists and design engineers who need to validate the safety of a rock face against planar failure, size a reinforcement scheme (nailing + mesh) and produce the calculation report compliant with NTC 2018 / Eurocode 7.
• Time to first result: 5 minutes (sample case) → 30 minutes (real case with reinforcement).

Typical workflow

1. Open the app: nx.geostru.ai/rockplane/
2. Fill in Project details (Description, Lat/Lon, Date, Site).
3. Enter the wedge geometry: H, β, α, ψ, B; optional tension crack T/θ.
4. Enter the material: γ, c, φ (Mohr-Coulomb on the plane) or Barton-Bandis (φb, JRC, JCS).
5. Enter optional actions: water (Hw/Zw/Zt), seismic kh/Ω, external force E/δ.
6. Add reinforcement from the catalogue: nails/anchors with NTC design, R1/R2 meshes.
7. Choose the code approach: Characteristic (γ=1) · NTC 2018 (A2+M2+R2) · EC7 (DA1/DA2/DA3).
8. Read FS at the top and the checks (R_i ≥ E_d) for each element.
9. Export the Word report and/or the DXF of the section.

See the full workflow →

Manual chapters

Model input

• Wedge geometry — H, β, α, ψ, B, tension crack
• Material — unit weight γ, cohesion c, friction angle φ
• Water — Hw external ponded, Zw in the discontinuity, Zt in the crack
• Pseudo-static seismic — kh, kv, Ω direction
• External force E — magnitude, δ inclination, G/Q load type

Reinforcement

• Passive nails — NTC §6.7, SoilNail Variant A, Clouterre N-V
• Active anchors — NTC §6.6, ξ Tab. 6.6.III, γ_Ra,t
• Meshes — R1 drape (normal pressure), R2 caging (resisting τ)

Computation

• Theoretical model — Hoek-Bray equations (1)–(30)
• Code approach — TA · NTC · EC7 partial factors
• Critical α — sweep of the failure plane dip

Output

• Word/DXF export — full calculation report
• File formats — .rockplane (JSON)

Reference

• Resources — downloadable sample files
• Numerical example — hand-worked tracking case
• Glossary — symbols, terminology
• FAQ — frequently asked questions

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