Environmental Engineering Reference
In-Depth Information
Natural water
content = 16%
1.30
Saturation
1.20
1.00
∆
e
0.80
Saturated water
content = 21%
0.60
0.40
0.3 0.5 0.7 1.0
2
4
8
Applied pressure (kg/cm
2
)
FIGURE 10.30
Effect of saturation on the pressure vs. void ratio curve of a porous clay from Brazil. (From Vargas, M.,
VIII
Seminario Nacional de Grandes Barragems
, Sao Paulo, 1972. With permission.)
FIGURE 10.31
Stereo-pair of aerial photos of area of porous clays showing probable collapse zones (state of Sao Paulo, Brazil).
Although residual soils are clays, the lack of drainage patterns indicates high infiltration. (From Hunt, R.E. and
Santiago, W.B.,
Proceedings 1, Congresso Brasileiro de Geologia de Engenharia,
Rio de Janeiro, 1976, pp. 79-98. With
permission.)
