Geology Reference
In-Depth Information
B
J
A
I
F
H
G
K
C
E
D
L
0.1
1.0
10
100
1000
LOG OF TIME (MINUTES)
A
TIME-DEFORMATION CURVE FROM DATA POINTS
B
DEFORMATION AT TIME = 0 MINUTES
C
EXTENSION OF FINAL LINEAR PORTION OF CURVE
D
EXTENSION OF STEEPEST LINEAR PORTION OF CURVE
d
100
DEFORMATION AT INTERSECTION OF LINES C AND D
E
t
1
SELECTED POINT IN TIME
F
t
2
TIME AT FOUR TIMES t
1
(DEFORMATION AT TIME t
2
SHOULD BE LESS
G
THAN 50% OF THE TOTAL DEFORMATION FOR THE LOAD INCREMENTS)
INCREMENT OF DEFORMATION BETWEEN TIMES t
1
AND t
2
H
I
INCREMENT OF DEFORMATION EQUAL TO H
J
d
0
CALCULATED INITIAL DEFORMATION
d
50
MEAN OF d
0
AND d
100
K
t
50
TIME AT d
50
L
Figure 20-3
Time-Deformation Curve From Log of Time Method [1]
298
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