Table 4.
Pullout capacity of the anchor pile system of different square pile groups configurations (2 × 2, 3 × 3 and 4 × 4) and spacings for different L/D ratios.
| Parameter | 2 × 2 pile groups configurations | 3 × 3 pile groups configurations | 4 × 4 pile groups configurations |
|---|---|---|---|
| Length (m) | 3 | 3 | 3 |
| Diameter (m) | 0.6 | 0.4 | 0.3 |
| L/D ratio | 5 | 7.5 | 10 |
| Pullout capacity of single pile | 227 | 144 | 107 |
| Pullout capacity of 2 × 2 pile group at S- 2.5 D | 2751.04 | 1421.27 | 881.74 |
| Pullout capacity of 2 × 2 pile group at S- 3.0 D | 3358 | 1728 | 1040.56 |
| Pullout capacity of 2 × 2 pile group at S- 3.5 D | 3520.43 | 1834.19 | 1149.79 |
| Efficiency of 2 × 2 pile group at S- 2.5 D (%) | 303 | 247 | 206 |
| Efficiency of 2 × 2 pile group at S- 3.0 D (%) | 370 | 300 | 243 |
| Efficiency of 2 × 2 pile group at S- 3.5 D (%) | 388 | 318 | 268 |
| Pullout capacity of 3 × 3 pile group at S- 2.5 D | 5804.14 | 2814.52 | 1785.26 |
| Pullout capacity of 3 × 3 pile group at S- 3.0 D | 7084.27 | 3421.91 | 2106.75 |
| Pullout capacity of 3 × 3 pile group at S- 3.5 D | 7427.15 | 3632.01 | 2327.98 |
| Efficiency of 3 × 3 pile group at S- 2.5 D (%) | 284 | 217 | 185 |
| Efficiency of 3 × 3 pile group at S- 3.0 D (%) | 346 | 264 | 219 |
| Efficiency of 3 × 3 pile group at S- 3.5 D (%) | 363 | 280 | 241 |
| Pullout capacity of 4 × 4 pile group at S- 2.5 D | 10204.23 | 4958.06 | 3054.54 |
| Pullout capacity of 4 × 4 pile group at S- 3.0 D | 12454.81 | 6028.04 | 3604.6 |
| Pullout capacity of 4 × 4 pile group at S- 3.5 D | 13057.62 | 6398.16 | 3979.48 |
| Efficiency of 4 × 4 pile group at S- 2.5 D (%) | 281 | 215 | 178 |
| Efficiency of 4 × 4 pile group at S- 3.0 D (%) | 343 | 261 | 210 |
| Efficiency of 4 × 4 pile group at S- 3.5 D (%) | 359 | 278 | 232 |