Earth Pressure Coefficients: sand_poorly_graded
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) |
|---|---|---|---|---|---|---|---|---|---|---|
| sand_poorly_graded | 28 | 0.5307 | 0.361 | 2.7698 | 0 | 0 | 19 | Poorly graded sand (SP), USCS | 16.5 | 105 |
| sand_poorly_graded | 30 | 0.5 | 0.3333 | 3 | 0 | 0 | 20 | Poorly graded sand (SP), USCS | 17 | 108 |
| sand_poorly_graded | 32 | 0.47 | 0.3073 | 3.2546 | 0 | 0 | 21 | Poorly graded sand (SP), USCS | 17.5 | 111 |
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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