Piles that hold a slope: resistance vs sliding depth.
Wide-spacing pile-row demand/capacity across your supplied slip surfaces, with convergence checked on every solve — a pile-row analysis, not a global slope-stability solver.
Stabilizing piles are loaded by the moving soil, not by a head load — so the analysis imposes a free-field soil displacement profile on the p-y springs and solves for the pile response, the approach RSPile implements as its applied-displacement feature.
The method resolves lateral p-y and axial t-z resistance tangent to movement, aggregates an explicit pile count, and selects the governing supplied surface by demand/capacity. It applies to independent piles at least six diameters apart; closer spacing and automatic global slip-surface search are rejected explicitly.
Applied displacement
Free-field movement tangent to each supplied surface is resolved into lateral and axial components.
Explicit wide-spacing row
Pile count, spacing, tributary width, distributed demand, row resistance, and demand/capacity are reported.
Governing supplied surface
The largest demand/capacity ratio governs; the tool does not substitute maximum sampled resistance.
Convergence enforced
Every lateral and axial component solve must converge; unsupported close spacing is rejected explicitly.
Validated against published benchmarks
Every figure below is produced by the engine on the cited published problem — closed-form solutions, design-manual tables, or independent codes — and reproduced by the test suite on every release.
Applied soil-displacement method (RSPile)
| Quantity | PileCalc | Reference | Agreement |
|---|---|---|---|
| Displacement resolution at 5° slip (axial / lateral, 25 mm)RSPile multi-layer slope-stabilization example | 2.18 / 24.91 mm | 2.18 / 24.91 mm | exact |
| Lateral resistance at the 8 m slip surfaceRSPile / TZPile / LPILE | 607 kN | 582 kN | within 4% |
The numbers, published
PileCalc's engine is checked term-by-term against the reference codes. A representative sample of the benchmarks — every intermediate value is visible in the app so you can reproduce them yourself.
Slope stabilization piles: common questions
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