Earth Pressure Coefficients: gravel
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) |
|---|---|---|---|---|---|---|---|---|---|---|
| gravel | 34 | 0.4408 | 0.2827 | 3.5371 | 0 | 0 | 23 | Well-graded gravel (GW), USCS | 20 | 127 |
| gravel | 36 | 0.4122 | 0.2596 | 3.8524 | 0 | 0 | 24 | Well-graded gravel (GW), USCS | 20.5 | 130 |
| gravel | 38 | 0.3839 | 0.2379 | 4.2037 | 0 | 0 | 25 | Gravel, dense (GW/GP), USCS | 21 | 134 |
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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