Environmental Engineering Reference
In-Depth Information
Table 2. Range of hoek-Brown criterion values used
for the parametric study.
masses were obtained from the hoek-Brown
criterion, based on a parametric study consider-
ing the possible range of values for each param-
eter, as presented in Table 2. The soil parameters
are mainly based on the Figure 12 and on values
available from the literature.
e
intact
[GPa]
σ
c,intact
[MPa]
Description
Gsi
mi
D
Fresh to slightly
weathered basalts
105
241
651
70
80
90
20
25
30
0
0.5
0.8
60
73
100
ReFeRences
Moderately weathered,
partially vacuolar
basalts
16
50
95
55
65
75
20
25
30
0
0.5
0.8
10
34
59
Bieniawski, Z.T. 1989.
Engineering rock mass classifica-
tions
. new York: John Wiley & sons.
hoek, e., carranza-Torres, c. and corkum, B. 2002.
hoek-Brown criterion—2002 edition
. Proc. NARMS-
TAC Conference,
Toronto, 2002, 1, 267-273.
hoek, e. and Diederichs, M.s. 2006. empirical estima-
tion of rock mass modulus.
International Journal of
Rock Mechanics and Mining Sciences
, 43, 203-215.
Marinos, P. and hoek, e. 2000 Gsi—a geologically
friendly tool for rock mass strength estimation.
Proc.
GeoEng2000 Conference
, Melbourne. 1422-1442.
Rosa, s. 1995.
Geological and geotechnical characteriza-
tion of Madeira's volcanic formations—Geotechnical
plan of the North area of Funchal
. M.sc. Thesis in
Geological engineering (in Portuguese). Universidade
nova de lisboa.
highly weathered,
vacuolar basalts
1
7
9
40
50
60
20
25
30
0
0.5
0.8
0.2
3
6
Fresh to slightly
weathered breccias
11
18
55
45
60
75
14
19
24
0
0.5
0.8
8
16
62
Moderatelly weathered
partially vacuolar
breccias
1
5
10
25
40
55
14
19
24
0
0.5
0.8
0.3
3
8
stiffness parameters for the different formations
that can be used as a guideline for preliminary
design purposes. The parameters of the rock
