Soil Properties: CH to GM
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 |
|---|---|---|---|---|---|---|---|---|---|
| CH | 25 | Clay of high plasticity, fat clay | practically_impermeable | 22 | 0 | 0 | 0 | Typical values. Actual properties depend on density, moisture, and site conditions. | fine_grained |
| CL | 20 | Clay of low plasticity, lean clay | very_poor | 27 | 0.000001 | 0.00001 | 0 | Typical values. Actual properties depend on density, moisture, and site conditions. | fine_grained |
| GC | 0 | Clayey gravel | poor | 34 | 0.00001 | 0.0001 | 0.000001 | Typical values. Actual properties depend on density, moisture, and site conditions. | gravel |
| GC-CL | 3 | Clayey gravel with many fines | poor | 29 | 0.00001 | 0.0001 | 0.000001 | Typical values. Actual properties depend on density, moisture, and site conditions. | gravel |
| GM | 0 | Silty gravel | fair | 36 | 0.0001 | 0.001 | 0.00001 | Typical values. Actual properties depend on density, moisture, and site conditions. | gravel |
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