Check cuttings, embankments and natural slopes by limit equilibrium. Draw the ground surface and layer boundaries, give each layer drained or undrained strength, add a piezometric line or ru, surcharges, a pseudo-static earthquake coefficient and rows of soil nails or anchors; the studio searches a grid of centres for the critical slip circle, refines it, and reports the factor of safety by the Bishop, Spencer, Janbu and Ordinary methods — or analyses your own non-circular surface — with the section, slice table, method comparison, a 3D view, calculation sheets and Excel.
Scope & limitations
Preliminary stability assessment for study and feasibility. Strength and groundwater parameters must come from a site investigation; have the design checked by a qualified geotechnical engineer.
What the Slope Stability Studio does
The cross-section is a ground-surface polyline with any number of layer boundaries below it and a hard stratum the slip surface may not cut. Each layer is drained (c', φ', γ, γsat) or undrained (cu, φ = 0); pore pressure comes from a piezometric line or a pore-pressure ratio ru, and strip surcharges and a horizontal seismic coefficient kh can be added.
The critical circle is found by evaluating a grid of centres with a range of radii and then refining the best by a pattern search. On that surface the factor of safety is computed by the Ordinary (Fellenius), Bishop simplified, Janbu simplified (with the f0 correction) and Spencer methods; a user polyline can be analysed as a non-circular surface by Spencer and Janbu.
Soil nails and ground anchors are entered by head position, angle, length, tensile capacity, bond and spacing; the force each one contributes is limited by the bond length beyond the slip surface and is included in the equilibrium of the slice it crosses.
Output: the section with layers, water, loads, the search grid and the critical surface with its slices, a method comparison chart, a slice table, a 3D view of the sliding mass, PDF calculation sheets, an A3 drawing and Excel.