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 | 1.17 | 5.53 | 0.117 | 0.13 | 20 | 94.52 | 2.84 | 13.42 | 0.142 | 30 | 141.78 | 4.28 | 20.23 | 0.143 | 19 | 10 | 47.26 | 2.71 | 12.81 | 0.271 | 0.25 | 20 | 94.52 | 4.73 | 22.35 | 0.237 | 30 | 141.78 | 6.85 | 32.37 | 0.228 | 17 | 10 | 47.26 | 4.09 | 19.33 | 0.409 | 0.39 | 20 | 94.52 | 7.72 | 36.48 | 0.386 | 30 | 141.78 | 11.12 | 52.55 | 0.371 | 15 | 10 | 47.26 | 5.06 | 23.91 | 0.506 | 0.51 | 20 | 94.52 | 10.40 | 49.15 | 0.520 | 30 | 141.78 | 15.02 | 70.98 | 0.501 | 13 | 10 | 47.26 | 5.30 | 25.05 | 0.530 | 0.53 | 20 | 94.52 | 10.57 | 49.95 | 0.529 | 30 | 141.78 | 15.76 | 74.48 | 0.525 |
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