Soil Density
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Average soil density for the soil layer.
Note: If the water table is located within a soil layer, soil layer should be split into two parts with different soil densities.
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Epsilon 50
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Soil strain which corresponds to 50% of the maximum principle stress. Some typical values for ε50—taken from EI 02C097—are shown in the following table.
Table 1. Representative values of ε50
Consistency of Clay |
Avg. Undrained Shear Strength (ksf) |
ε50 |
Soft |
- |
0.020 |
Medium |
- |
0.010 |
Stiff |
1-2 |
0007 |
2-4 |
0.005 |
4-8 |
0.004 |
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Cohesion
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Undrained shear strength of a cohesive soil. |
J Parameter
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An empirical, dimensionless parameter. A value of 0.5 is frequently used (soft clay). A value of 0.25 can be used for a medium clay.
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Initial Soil Stiffness
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Slope, k, to use for the initial, straight-line portion of the p-y curve representing static, linear loading. Some typical values for k—taken from EI 02C097—are shown in the following table.
Table 2. Representative values of k for stiff clays
Avg. Undrained Shear Strength (ksf) |
ks (lb/in.3) |
kc (lb/in.3) |
1-2 |
500 |
200 |
2-4 |
1,000 |
400 |
4-8 |
2,000 |
800 |
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