Undrained Shear Strength | Su(kPa) | |
Solid silty clays / oily silts (oc) | Su> 150 kPa | |
Stiff silty clays (oc) | Su = 75 ~ 150 kPa | |
Soft-stiff silty clays (oc) | Su = 40 ~ 75 kPa | |
Soft silty clays / tonic silts (nc) | Su = 20 ~ 40 kPa | |
Pulpy silty clays / tonic silt (nc) | Su <20 kPa | |
Drained shear strength | C ‘[kPa] | Φ ’[°] (φ’ cv - φ ’ max) |
Dense quartz sand | 0 | 35 ° - 45 + ° |
Loose quartz sand | 0 | 33 ° - 35 ° |
Mica in sand fraction | 0 | 25 ° - 31 ° |
Feldspar in sand fraction | 0 | 37 ° - 45 ° |
Poisson’s ratio | v |
Mostly Clay Soils | 0.4 to 0.5 |
Saturated Clay Soils | 0.45 to 0.5 |
Cohesionless, medium and dense | 0.3 to 0.4 |
Cohesionless, loose to medium | 0.2 to 0.35 |
Type of soil | USC | Range of k in MN m^(-3) |
Light peat and boggy soil | Pt | 3 - 5 |
Heavy peat, find loose sand | Pt & SP | 5 - 8 |
Rubble, poorly compacted | GP | 5-10 |
Wet Clay | CL to CH | 10 - 15 |
Damp Clay | 20 - 25 | |
Dry Clay | 30 - 50 | |
Sand Clay with some Gravel | SC to GC | 40 - 50 |
Sand Silt Gravel Mix | SW to GM | 50 - 60 |
Consistency | Loose (N between 4 - 10) | Medium to Dense (N between 11 - 30) | Dense (N between 31 - 50) |
Dry to Moist Sand | 2.2 | 6.6 | 17.6 |
Submerged Sand | 1.3 | 4.4 | 10.7 |