Hydro-Mechanical Properties of an Unsaturated Frictional Material

8.3. SUMMARY 183
Volumetric water content (%)
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0
Experimental drainage results (Initial void ratio 0.66) Experimental imbibition results (Initial void ratio 0.66) Drainage fit and Imbitioin fit using
0.1 1 10 100
Suction (kPa)
drainage results (Initial void ratio 0.89) Experimental imbibition results (Initial void ratio 0.89) Experimental
proposed model
Figure 8.10: Model validation results from main drainage and main imbibition curve derived
from steady state tests in the modified pressure plate apparatus (loose and dense specimen)
Figure 8.11: Model validation results from scanning imbibition curves derived from steady
state tests in the modified pressure plate apparatus (loose specimen-left, dense specimen-right)
in upper part of the soil-water characteristic curve. Modifications of the proposed model may
be necessary, using the above described procedure.
8.3 Summary
Following a well understood statistical method (process modeling) new soil-water character-
istic curve models were proposed for drainage and imbibition process. The procedure was
introduced in detail in Chapter 3 and easily could be applied in this chapter for any suction-
volumetric water content (saturation, gravimetric water content) measurements derived from
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