One subscription. A growing suite of geotechnical tools.

NAVFAC Deep Foundation Analysis

Driven pile and drilled shaft axial capacity per NAVFAC DM-7 — skin friction and end bearing by soil layer, with code-traceable output.

• Axial capacity per NAVFAC DM-7 methods
• Driven piles and drilled shafts
• Skin friction and end bearing by soil layer
• Multiple pile types supported
• Code-traceable output with method references
• Formatted PDF calculation report

Slope Stability Analysis

Limit-equilibrium slope stability by Spencer, Bishop, Janbu, and Fellenius, with an automated grid search for the critical failure surface on multi-layer profiles.

• Spencer, Bishop, Janbu, and Fellenius methods
• Automated critical-surface search
• Layered soils, pore pressure, seismic loading
• Per-slice force and moment tabulations
• Global minimum factor of safety
• Formatted PDF calculation report

Lateral Pile Analysis (p-y)

Single piles and drilled shafts under lateral load and moment — Broms ultimate capacity plus nonlinear p-y finite-difference analysis with a full p-y curve library.

• Broms ultimate lateral capacity
• Nonlinear p-y finite-difference solver
• Deflection, shear, and moment profiles
• Full p-y curve library
• Free- and fixed-head conditions
• Automatic soil parameter tuning based on load test data
• Formatted PDF calculation report

Retaining Wall Design

Permanent cantilever, gravity, and semi-gravity retaining walls — overturning, sliding, bearing, eccentricity, and global stability.

• Cantilever, gravity, and semi-gravity walls
• Active and at-rest earth pressure
• Overturning, sliding, and bearing checks
• Base eccentricity and bearing-pressure distribution
• Global stability through the wall
• Formatted PDF calculation report

Helical Piles & Anchors

Compression and uplift capacity of helical piles and anchors per ICC-ES AC358 — individual-bearing and cylindrical-shear methods, with installation-torque QC.

• Compression and uplift (tension) capacity
• Individual-bearing and cylindrical-shear methods
• Single- and multi-helix configurations
• Automated optimal helix selection based on soil parameters and design loads
• Installation torque-to-capacity correlation
• LRFD and ASD capacity output
• Formatted PDF calculation report

Shallow Foundations

Spread footing bearing capacity by the Vesić general equation with a Terzaghi cross-check, plus settlement, applied-pressure, and sliding checks.

• Vesić general bearing-capacity equation
• Terzaghi bearing-capacity cross-check
• Effective-area reduction for eccentric loads
• e-log-p consolidation settlement
• Sliding-resistance check
• Formatted PDF calculation report

Geotechnical Calculators

A grab-bag of fast, stateless calculators — SPT corrections, OCR and modulus correlations, stress-influence factors, settlement, bearing, and sliding — each with a rendered equation.

• SPT N-value corrections
• OCR and modulus correlations
• Stress-influence factors
• Single-layer settlement
• Fully rendered equations
• No project setup required
• Perfect sandbox environment for young engineers to experiment with common geotechnical calculations

Sheet Pile & Soldier Pile Wall Design

Sheet pile and soldier pile wall design — cantilever, braced, and anchored — with surcharge loading, seepage, automatic section sizing, and CAD drawing output.

• Cantilever, braced, and tied-back walls
• Uniform, strip, area, and point surcharge loading
• Active and passive pressure diagrams
• Automatic steel-section sizing
• DXF CAD drawing export
• Formatted PDF calculation report

Coming soon

MSE Wall Design

Internal and external stability of MSE retaining walls — steel and geosynthetic reinforcement, pullout, rupture, sliding, eccentricity, bearing, and global stability.

• Reinforcement rupture and pullout checks
• Steel strip, grid, and geosynthetic reinforcement
• Sliding, eccentricity, and bearing
• Global (compound) stability
• LRFD and ASD load combinations
• Formatted PDF calculation report

Coming soon

Dewatering & Seepage

Aquifer-test analysis (pumping, slug, step-drawdown, constant-head) estimating T, S, and K with a plan-view drawdown heatmap, plus closed-form construction-dewatering design.

• Pumping, slug, step-drawdown, constant-head tests
• Estimates of transmissivity, storativity, and K
• Plan-view drawdown heatmap
• Well-system sizing (rate, spacing, drawdown)
• Base piping and heave checks
• Formatted PDF calculation report

Coming soon

Pile Group Analysis

Group capacity for driven piles and drilled shafts — Converse-Labarre efficiency, block failure, equivalent-raft settlement, and lateral p-multiplier analysis.

• Converse-Labarre group efficiency
• Block-failure capacity check
• Equivalent-raft group settlement
• Lateral p-multipliers by row position
• Driven piles and drilled shafts
• Formatted PDF calculation report

Coming soon

Drilled Shaft Design

Axial capacity and load-settlement of drilled shafts and CFA piles — clay, sand, clay-shale, rock-socket, and IGM methods, with capacity-vs-depth sweeps.

• Side resistance and end bearing by layer
• Clay, sand, IGM, and rock-socket methods
• Straight and belled shafts
• Capacity-versus-depth sweeps
• Load-settlement (t-z) curves
• Formatted PDF calculation report

Coming soon