BS 1377 Part 8 1990
Consolidation undrained triaxial compression test with measurement of pore pressure
Location
Job Ref:
BH No.
Soil Description
Sample No.
Depth
Test method
BS1377: Part 8:
1990
Clause 7
Date
Pressure system no.
Membrane
Start compression
Failure
Max.deviator stress
Nominal
s
3
'
kPa
Cell no.
Thickness
mm
L
c
mm
Criterion*
Max.stress ratio
Cell pressure
kPa
Machine no.
With/without*
A
c
mm
2
Critical state
Machine speed
mm/min
Force device no.
side drains
V
c
cm
2
Axial strain of
%
Rate of strain
% per h
Date
Time
Axial strain
Area
Axial force
Pore
Deviator stress
Principal stresses
A
Stress Path*
Pressure
Coeff.
Reading
D
L
e
A
s
Reading
Diff-
C
r
P
u
u - u
o
(
s
1
-
s
3
)
m
s
mb
+
s
dr
(
s
1
-
s
3
)
s
1
s
1
'
s
3
'
Ratio
u - u
o
s'
t'
erence
s
1
' /
s
3
'
s
1
-
s
3
mm
mm
2
R
R
-
R
o
N/div
N
kPa
kPa
kPa
kPa
kPa
kPa
kPa
kPa
kPa
kPa
0
0
0
0
0
0
1
0
*Delete as appropriate
Operator
Checked
Approved
Form 8D