Environmental Engineering Reference
In-Depth Information
soil property functions in order to obtain convergence of
the solution.
7. When a soil undergoes significant volume change during
the change in soil suction, it necessary to use the shrink-
age curve (or measure volume change in the SWCC test)
and use the appropriate water content versus suction
relationship for the estimation of the unsaturated soil
property functions. For example, volumetric water con-
tent versus soil suction should be used when computing
the water storage function for a soil. On the other hand,
the degree of saturation versus soil suction relationship
must be used for the interpretation of the correct air-entry
value for the soil and the computation of the unsaturated
soil property functions.
8. The practicing geotechnical engineer needs to recognize
that the reliability of theoretical or statistical estimation
techniques becomes progressively less reliable as the
clay content of a soil increases.
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