Calculation report
- Model
- Driven pile group in clay
- Analysis
- Piles
- Date
- 15 October 2026
- Units
- SI · kN, m, kPa
1Summary
The model satisfies its check.
| Check | Value | Limit | Margin | Result |
|---|---|---|---|---|
| Pile group | 3.46 | ≥ 3.00 | +15 % | OK |
Limits are Rischio's defaults.
2Model
Piles
Driven pilePile · Circular · Driven
| Shape | Circular |
| Diameter or side | 0.600 m |
| Length | 20.00 m |
| Installation | Driven |
GroupGroup of 6 piles
| Piles along x | 2.00 |
| Piles along y | 3.00 |
| Spacing | 1.50 m |
Soil
| Behavior | m | kN/m³ | kN/m³ | kPa | |
|---|---|---|---|---|---|
| Soft clay | Undrained | 10.00 | 18.00 | 18.00 | 50.00 |
| Stiff clay | Undrained | 20.00 | 18.00 | 18.00 | 250.0 |
Thickness · Unit weight · Saturated unit weight · Undrained shear strength
Water
Water tableWater table · depth below ground
| Depth | 5.00 m |
Loads
Pile cap loadLoad · on the group
| Vertical load | 5000.0 kN |
3Shaft resistance
Perimeter of the pile
= 1.88 m
Critical depth
Shaft resistance stratum by stratum
| Stratum | m | kPa | kPa | kN | |
|---|---|---|---|---|---|
| Soft clay | 10.00 | 90.00 | 0.680 | 34.00 | 640.9 |
| Stiff clay | 10.00 | 171.9 | 0.340 | 85.00 | 1602.2 |
Length · Effective stress at mid-length · Adhesion factor · Unit shaft resistance · Shaft resistance
, with and .
Shaft resistance
where in Soft clay = 640.9 kN, in Stiff clay = 1602.2 kN
4Toe resistance
Area of the toe
= 0.283 m²
Unit toe resistance
Toe resistance
where = 2250.0 kPa, = 0.283 m²
5Single pile
Ultimate capacity of a pile
where = 2243.1 kN, = 636.2 kN
6Pile group
Sum of the single piles
where = 2879.3 kN
Capacity of the group as a block
Group efficiency
where = 50028.8 kN, = 17275.6 kN
Capacity of the group
where = 2.90 , = 17275.6 kN
Check · Pile group
margin +15 %
where = 17275.6 kN, = 5000.0 kN