Earth Pressure Coefficients: silt
Earth pressure coefficients (Ka, K0, Kp) by soil category and friction angle for retaining wall and excavation design
| soil category | phi deg | K0 (dimensionless) | Ka (dimensionless) | Kp (dimensionless) | cohesion kPa (kPa) | cohesion psf (psf) | delta wall friction deg (deg) | description | gamma kN m3 (kN/m3) | gamma pcf (pcf) |
|---|---|---|---|---|---|---|---|---|---|---|
| silt | 24 | 0.5934 | 0.4217 | 2.371 | 5 | 104 | 16 | Low-plasticity silt (ML), USCS | 17 | 108 |
| silt | 26 | 0.5616 | 0.3905 | 2.5611 | 5 | 104 | 17 | Low-plasticity silt (ML), USCS | 17.5 | 111 |
| silt | 28 | 0.5307 | 0.361 | 2.7698 | 8 | 167 | 19 | Silt (ML), USCS | 18 | 115 |
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clay_high_plasticity3 rowsclay_low_plasticity3 rowscohesive_medium3 rowscohesive_soft3 rowscohesive_stiff3 rowscohesive_undrained_hard1 rowcohesive_undrained_medium1 rowcohesive_undrained_soft1 rowcohesive_undrained_stiff1 rowcohesive_undrained_very_stiff1 rowgranular_dense3 rowsgranular_loose3 rows