Environmental Engineering Reference
In-Depth Information
Tension crack
Z
Z
w
V
U
H
L
W
θ
i
(a)
Z
H
FIGURE 9.68
Plane failure analysis of a rock slope
with a tension crack: (a) tension
crack in upper slope surface; (b)
tension crack in slope face. (From
Hoek, E. and Bray, J. W.,
Rock Slope
Engineering,
2nd ed., The Institute of
Mining and Metallurgy, London,
1977. With permission.)
Z
w
V
θ
U
i
W
(b)
Weathering profile
zone
Peizometric level in
permeable zones (IIA and IIB)
IC
Residual soil
D
B
Potential slide
(simple weldge)
Peizometer
IIA
Weathered rock
(permeable zone)
IIB
Unweathered
rock
III
A
Granite
Springs
Flow and
pore-pressure
conditions
FIGURE 9.69
Development of simple wedge failure in residual soil over rock. (After Patton, F. D. and Hendron, A. J., Jr.,
Pro-
ceedings of the 2nd International Congress, International Association of Engineering Geology,
Sao Paulo, 1974, p. V-GR 1.)
