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Geotechnical News • March 2014
41
THE GROUT LINE
Paolo Gazzarrini
Overture
34th episode of the Grout Line and,
as usual for this time of the year, a
reminder, for those of you who are
interested in the 35th (one edition
more than the Grout Line, but with
annual frequency) Grouting Funda-
mentals & Current Practice to be held
at the Colorado School of Mines from
June 16 to June 20, 2014.
The figure above summarizes who
should attend and for more informa-
tion about the complete schedule
and instructors, please visit the web
site
http://csmspace/events/grouting
.
Notice the unique half day field dem-
onstration of grouting techniques and
grouting products.
In addition to the above reminder, for
this edition of the Grout line, I have a
Nordic (Swedish-Norwegian) grouting
article, mainly for grouting in rock in
tunnels. In the proceeding of the 7th
Nordic Grouting Symposium orga-
nized by BeFo (Stiftelsen Bergteknisk
Forskning or- in English- Rock Engi-
neering Research Foundation-
www.
befoonline.org
) held in Gothenburg
(Sweden) on November 13, 2013, I
found the following article that can be
of some interest to North American
grouters.
I have authorization to re-publish the
article from BeFo and I would like to
thank Eva Friedman, from BeFo, in
helping me to make this happen.
The authors are Eivind Grøv - Chief
Scientist SINTEF and Professor II
University of Science and Technology
in Trondheim (NTNU), Norway,
Johan Funehag- Assistant Professor,
Chalmers University of Technology;
Gothenburg; Sweden,
and
Thomas Janson- PhD rock mechanics,
Tyréns, Gothenburg, Sweden
Rock mass grouting in Sweden and Norway
A matter of cultural differences
or factual causes?
Eivind Grøv, Johan Funehag, Thomas Janson
Introduction
Rock mass grouting has become an
important aspect in tunneling and
underground excavation, particularly
whilst executing such work in urban
areas with a highly developed surface
infrastructure and also in areas which
due to various reasons are sensitive
to fluctuations in ground water levels.
The public focus on tunneling work
has increased during the last decades,
not only project cost and schedules
are scrutinized carefully, but also the
consequences caused by ground water
lowering on the surroundings such as
flora and fauna, building settlements
etc.
There is a difference in philosophy
around in the tunneling industry; some
scholars prefer high pressure grouting
whilst others prefer lower pressure.
One school using high pressure one
can say that the design is in a simpli-
fied way a similar process as when