Research Article
Experiments on Reducing Negative Skin Friction of Piles
| Moisture content (%) | Vertical force (kN) | Compressive stress (kPa) | Horizontal force (kN) | Friction strength (kPa) | Friction coefficient | Average friction coefficient |
| 21 | 10 | 47.26 | 2.12 | 10.02 | 0.212 | 0.22 | 20 | 94.52 | 4.94 | 23.35 | 0.247 | 30 | 141.78 | 5.88 | 27.79 | 0.196 | 19 | 10 | 47.26 | 2.65 | 12.52 | 0.265 | 0.25 | 20 | 94.52 | 4.85 | 22.92 | 0.243 | 30 | 141.78 | 7.07 | 33.41 | 0.236 | 17 | 10 | 47.26 | 3.17 | 14.98 | 0.317 | 0.32 | 20 | 94.52 | 6.56 | 31.00 | 0.328 | 30 | 141.78 | 9.72 | 45.94 | 0.324 | 15 | 10 | 47.26 | 5.42 | 25.61 | 0.542 | 0.55 | 20 | 94.52 | 10.56 | 49.91 | 0.528 | 30 | 141.78 | 17.16 | 81.10 | 0.572 | 13 | 10 | 47.26 | 6.26 | 29.58 | 0.626 | 0.61 | 20 | 94.52 | 10.98 | 51.89 | 0.549 | 30 | 141.78 | 19.50 | 92.16 | 0.650 |
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