Hydro-Mechanical Properties of an Unsaturated Frictional Material

7.2. SOIL-WATER CHARACTERISTIC CURVE 141
Volumetric water content (%)
Volumetric water content (%)
Volumetric water content (%)
Volumetric water content (%)
50
40
30
20
10
0
50
40
30
20
10
0
50
40
30
20
10
0
50
40
30
20
10
0
Experimental results - imbibition Best fit Brooks and Corey (1959)
100 10 1 0
Suction (kPa)
results - drainage Best fit Brooks and Corey (1959) Experimental
Experimental results - imbibition Best fit van Genuchten, m=1-1/n (1980)
100 10 1 0
Suction (kPa)
results - drainage Best fit van Genuchten, m=1-1/n (1980) Experimental
imbibition Best fit van Genuchten (1980)
100 10 1 0
Suction (kPa)
results - drainage Best fit van Genuchten (1980) Experimental
results - Experimental
Experimental results - imbibition Best fit Fredlund and Xing (1994)
0 1 10 100
Suction (kPa)
results - drainage Best fit Fredlund and Xing (1994) Experimental
Saturation (-)
Saturation (-)
Saturation (-)
Saturation (-)
1.0
0.8
0.6
0.4
0.2
0.0
1.0
0.8
0.6
0.4
0.2
0.0
1.0
0.8
0.6
0.4
0.2
0.0
1.0
0.8
0.6
0.4
0.2
0.0
Suction (kPa) 100 10 1 0
Suction (kPa) 100 10 1 0
Suction (kPa) 100 10 1 0
0 1 10 100
Suction (kPa)
Figure 7.3: Comparison between experimental results and best fitted relations derived from
several suction-water content models for drainage and imbibition process from modified pressure
plate apparatus (loose specimens, steady state test)