Geotechnical Engineering Calculator

Comprehensive calculations for foundation design, bearing capacity, settlement analysis, and earth pressure.

Bearing Capacity Calculator

Terzaghi's Ultimate Bearing Capacity:
qu = c·Nc·sc·dc·ic + γ·D·Nq·sq·dq·iq + 0.5·γ·B·Nγ·sγ·dγ·iγ
Soil Footing B L D Required: B, L, D, c, φ, γ Footing Dimensions

Settlement Calculator

Immediate + Consolidation Settlement:
Immediate: Se = (q·B·I) / (E·Cs)
Consolidation: Sc = (Cc·H)/(1+e0)·log10(σ'f/σ'i)
Dense Layer Compressible Layer Foundation q (psf) B H Required: q, B, E, Cc, e0, H Foundation & Soil Layers
Immediate Settlement
Consolidation Settlement

Lateral Earth Pressure Calculator

Active Earth Pressure: Ka = tan²(45° - φ/2)
Passive Earth Pressure: Kp = tan²(45° + φ/2)
Backfill H q Required: H, φ, γ, q Pressure Distribution

Pile Capacity Calculator

Ultimate Pile Capacity:
Qu = Qs + Qp = Σ(α·Su·As) + (Ap·Nq·σ'v + Ap·Nc·Su)
Soil D L Required: D, L, Su, σ'v Load Pile Dimensions
Pile Properties
Soil Properties

Retaining Wall Calculator

Check sliding, overturning, and bearing capacity
Factor of Safety for Sliding: FSsliding = (ΣResisting Forces) / (ΣDriving Forces) > 1.5
Backfill H B t Required: H, B, t, φ, γ, q Retaining Wall Geometry
Wall Geometry
Soil Properties & Loads

Results

Select a calculation type and enter the required parameters.

Other Tools

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Important Notes:
  • These are simplified calculations
  • Consult geotechnical engineer for design
  • Site-specific soil investigation required
  • Local codes and standards apply