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Geotechnical News • December 2012
45
THE GROUT LINE
Examples
Surrey, BC, Guilford Mall. Seismic
anchors.
The design called for the installation
of 12 #18 DCP seismic anchors in 2
footings, 6 each, as per picture #5. The
anchors were proof tested using the
recording apparatus, and conventional
measuring as shown in picture #6 and
#7.
Picture #8 shows the printout obtain-
able in the field with all the relevant
data of the proof test. Pictures #9 and
#10 show the printouts from the soft-
ware; the classic tension/elongation
graph and the graphics displacement
vs. time with the creep.
All the tests were conducted using the
conventional dial and pressure gauge
in order to be able to compare the
results. The results were comparable
and the behaviour of the anchors was
similar. Small differences in reading
of hydraulic jack
pressures and
displacement
were observed.
Additional inves-
tigation into these
aspects shall be
conducted.
New Westmin-
ster, BC. multi-
use civic facility
center
The design called
for the installa-
tion of 25 micro-
piles and all the
micropiles will
be tested in ten-
sion only due to
space constrains
and impossibil-
ity of installing
reaction anchors
for compression testing. The work, at
the time of the writing of this article,
is currently under construction and
only one sacrificial micropile has been
installed and tested.
The site arrangement is similar to pic-
ture #6 and in picture #11 the results
of the performance test carried out are
shown.
Also in this site the results obtained
with the electronic apparatus and the
“conventional” readings were compa-
rable.
Conclusions
To the author’s knowledge no lit-
erature is available related to the use
of electronic apparatus for continu-
ous monitoring and recording of the
testing of micropiles/anchors. Not
knowing the reason for this lack of
information, the author found that the
testing apparatus used for this prelimi-
Picture 7. Detail of the testing.
Picture 8. Print-
out in the field.
Picture 9. Printout from the software.