Pile Group Efficiency & Settlement Calculator

1. Group Layout & Geometry

Rows (m)

Columns (n)

Pile Diameter D (m)

Center-to-Center Spacing s (m)

Pile Length L (m)

Load Transfer Mode

2. Capacities & Applied Load

Single Ult Capacity Qu (kN)

Total Group Load Qg (kN)

Avg Shaft Adhesion cu (kPa)

Tip Undrained Strength cub (kPa)

3. Compressibility & Settlement

Soil Modulus Es (MPa)

Poisson's Ratio ν

Compression Index Cc

Recompression Cr

Initial Void Ratio e0

Clay Thickness Hc (m)

Preconsolidation σ'p (kPa)

Overburden σ'v0 (kPa)

Efficiency η

78.5%

Converse-Labarre

Gov. Ult Capacity

6,712 kN

Group Friction

Factor of Safety

2.10

At applied Qg

Total Settlement

24.2 mm

Se: 4.8, Sc: 19.4 mm

Plan View Bg × Lg

2:1 Stress Cone Raft @ 2/3 L

Method / Check	Efficiency η	Group Ult Cap	Status
Converse-Labarre	78.5%	6,712 kN	Standard
Sayed & Baker (1992)	81.2%	6,942 kN	Comparative
Block Failure (Skempton)	94.1%	8,045 kN	Adequate

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