Slide3 Upd Crack Full — Rocscience

| Item | Summary | |------|----------| | Critical mechanism | Planar slip parallel to Joint J1, intersecting the crown and toe. | | Deterministic FS (wet) | 1.34 – below the required 1.5 safety margin. | | Probability of failure | 38 % for FS < 1.5 under the 10‑yr storm; 5 % for FS < 1.0. | | Primary control | Joint cohesion and transient pore‑pressure on J1. | | Design adequacy | Existing geometry is not sufficient for the design storm; mitigation is required. |

  • Monitoring recommendations – Installation of piezometers across J1 at three depths (10 m, 20 m, 30 m) will provide early warning of pressure spikes. Inclinometers aligned with the joint dip will detect lateral movement exceeding 5 mm, which the model predicts as the onset of failure. rocscience slide3 upd crack full

    • Slide3 is a 3D limit equilibrium slope stability software developed by Rocscience. It's used for analyzing slope stability in various geological and geotechnical engineering projects. This software allows engineers to model complex slopes with different materials and groundwater conditions to assess stability and design safe slopes. | Item | Summary | |------|----------| | Critical

    | Mechanism | Description | FS (dry) | FS (wet, t = 12 h) | |-----------|-------------|----------|--------------------| | Planar | Slip surface parallel to joint J1, intersecting crown and toe. | 1.78 | 1.34 | | Wedge | Two‑joint block bounded by J1 and a bedding plane (dip = 20°). | 1.45 | 1.12 | | Circular | Rotational slide centred at 22 m depth, radius = 28 m. | 1.60 | 1.38 | Slide3 is a 3D limit equilibrium slope stability

    The planar mechanism governing J1 is the most critical.

    Key observations

    | Step | Action | Slide3 Module | |------|--------|---------------| | 1 | Static equilibrium (no water) – baseline FS. | Static | | 2 | Transient infiltration – solve for pore‑pressure distribution at t = 12 h (peak). | Hydrology + Static | | 3 | Kinematic search – generate all admissible slip surfaces (planar, wedge, circular). | Kinematic | | 4 | Limit‑equilibrium – compute FS for each mechanism using Strength (Mohr‑Coulomb) and Shear on joints. | Strength | | 5 | Monte‑Carlo – random sampling of φ and c (Gaussian) → 10 000 realizations → distribution of FS. | Statistical | | 6 | Post‑processing – extract critical mechanism, deformation contours, factor‑of‑safety maps. | Results |