Laboratory Test Sheet
Triaxial Saturation - BS 1377 : Part 5 : 1990 |
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| Triaxial
Saturation |
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| Location |
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Job ref. |
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Borehole/Pit no. |
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| Soil
description |
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Sample No. |
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Depth |
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Date |
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| Group/Type |
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Date Form |
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| Test
method BS1377: Part
8: 1990 Clauses
5.3/5.4* |
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| Consolidated-undrained/consolidated-drained*triaxial
compression test |
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| With/without*side
drains |
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Date started |
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Completed |
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| Pressure system
no. |
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Cell no. |
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| Required
effective pressure |
s3 |
kPa |
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Initial diameter |
Do |
mm |
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| Cell pressure |
s3 |
kPa |
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Initial length |
Lo |
mm |
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| Back pressure |
ub |
kPa |
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Initial area |
Ao |
mm2 |
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| Pore pressure
after build-up |
ui |
kPa |
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Initial volume |
Vo |
cm3 |
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| Excess pore
pressure |
(ui - ub) |
kPa |
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| Consolidation
data |
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| Date |
Time |
Elapsed time |
/t |
Volume change |
Pore pressure |
| t(min) |
indicator |
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Reading |
Difference |
Reading |
Difference |
Dissipation |
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u |
(ui - u) |
U |
| mL |
mL |
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kPa |
% |
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| Final difference
= |
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| total
consolidation volume change DVc |
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| After
consolidated |
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| Consolidated
volume |
Vc = Vo - DVc |
cm3 |
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Coeffiecient of volume |
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| Volumetric
strain |
ev = |
DVc |
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Compressibility |
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Vo |
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mvi = |
1000ev |
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| Consolidated
length |
Lc = Lo(1 - 1/3 ev) |
mm |
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(ui - uc) |
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| Consolidated
area |
Ac = Ao(1 - 2/3 ev) |
mm2 |
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mvi = |
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m2/MN |
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| Value of l |
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Value of F |
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Coeffiecient of |
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| From graph |
/ t100 |
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t 100 = |
min |
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Consolidation |
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cvi = |
2.1 Ac |
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| Significant
testing time |
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tf = Ft100 |
min |
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lt100 |
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m2/year |
| Significant
strain : assumed failure/reading intervals* |
ef = |
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| Calculated rate
of axial displacement |
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dr = |
efLc |
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mm/min |
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tf |
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| Selected machine
speed |
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mm/min |
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Operator |
Checked |
Approved |
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| *Delete as
appropriate |
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Form 8C |
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