Janbu Characteristics
Values of the Janbu modulus m and of stress exponent j (according to Canadian Foundation Engineering Manual 1992)
Soil | Janbu modulus m | Stress index j |
Very dense to dense till, glacial till | 1000 - 300 | 1 |
Gravel | 400 - 40 | 0.5 |
Dense sand | 400 - 250 | 0.5 |
Medium condition sand | 250 - 150 | 0.5 |
Loose sand | 150 - 100 | 0.5 |
Dense silt | 200 - 80 | 0.5 |
Medium condition silt | 80 - 60 | 0.5 |
Loose silt | 60 - 40 | 0.5 |
Hard to very stiff clay | 60 - 20 | 0 |
Medium to stiff clay | 20 - 10 | 0 |
Soft clayey silt | 10 - 5 | 0 |
Soft marine clays | 20 - 5 | 0 |
Organic clays | 20 - 5 | 0 |
Peats | 5 - 1 | 0 |