Soil Properties: SM-SL to SW
Geotechnical soil engineering properties by USCS classification — friction angles, cohesion values for foundation and earthwork design
| uscs type | cohesion kPa (kPa) | description | drainage class | friction angle deg (deg) | hydraulic conductivity cm s (cm/s) | hydraulic conductivity max cm s (cm/s) | hydraulic conductivity min cm s (cm/s) | notes | soil group |
|---|---|---|---|---|---|---|---|---|---|
| SM-SL | 0 | Silty sand with many fines | fair | 34 | 0.0001 | 0.001 | 0.00001 | Typical values. Actual properties depend on density, moisture, and site conditions. | sand |
| SP | 0 | Poorly graded sand | good | 36 | 0.01 | 0.1 | 0.001 | Typical values. Actual properties depend on density, moisture, and site conditions. | sand |
| SW | 0 | Well-graded sand, fine to coarse sand | good | 38 | 0.01 | 0.1 | 0.001 | Typical values. Actual properties depend on density, moisture, and site conditions. | sand |
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