Driven Concrete Pile Capacity Calculator
Calculate geotechnical load capacity for driven piles using Skin Friction and End Bearing. Features dynamic soil layering (Sand, Clay, Silt).
1. Pile Dimensions
2. Soil Stratigraphy (Layers)
About
Deep foundations rely on piles to transfer structural loads to stronger soil layers deep underground. This calculator estimates the Ultimate Bearing Capacity (Qu) of a precast driven concrete pile by summing two components: Skin Friction (Qs), derived from the adhesion of soil along the pile shaft, and End Bearing (Qb), the resistance at the pile tip.
Users can construct a digital bore log by adding multiple soil layers (Sand, Clay). The tool applies the Alpha (α) Method for cohesive soils (Clay) and frictional analysis (β or N-values) for cohesionless soils (Sand), providing a total static capacity estimate essential for preliminary foundation design.
Formulas
Total Ultimate Capacity (Qu) is:
For Clay layers (Alpha Method):
For Sand layers (simplified stress method):
Reference Data
| Soil Type | Interaction Type | Key Parameter | Typical Values |
|---|---|---|---|
| Clay (Soft) | Adhesion (α) | Cohesion (cu) | 10 - 25 kPa |
| Clay (Stiff) | Adhesion (α) | Cohesion (cu) | 50 - 100+ kPa |
| Sand (Loose) | Friction | Angle (φ) | 28° - 30° |
| Sand (Dense) | Friction | Angle (φ) | 35° - 40° |
| Concrete Pile | Material | Density | 2400 kg/m3 |