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Micro Piles |
Pressure Grouting |
Rock Anchors |
Permeation Grouting
Soil Nailing |
Compaction Grouting |
Micropiles |
Injection Grouting |
Chemical Grouting
Our
techniques apply when adding new structures:
especially
rock anchor,
microfine cement,
soil nailing,
micropile
installations for
foundation support.
We
specialize in
slope stabilization,
anchors,
permeation grouting,
foundation repair
and support,
grouting,
soil nails,
rock drilling,
micropile installations, and
sinkholes. We
use a
problem-solving approach geotechnical
architecture of buildings, bridges,
water plants, sewage plants, tunnels,
sinkholes,
caisson,
shoring,
underpinning,
agriculture, and
roads
construction. We
are experienced in these applications:
micro piles,
sinkhole repair,
permeation grouting, pressure
grout,
soil nails,
chemical grouting,
micropiles,
compaction grout, and
rock anchors.
Our specialties are
rock anchor,
acrylamide and
compaction grouting,
mini piles,
sinkhole repair,
micropiles,
acrylamide grouting, and
soil nailing.
We will continue to dedicate ourselves to
excellence,
including
insurance mortgage, in our performance, in our
integrity, and in our relationships with our
customers. We will carefully weigh our
decisions, actions, and results to make sure
that we remain the most trusted name in the
geotechnical contracting industry. Please
visit our website
http://www.rembco.com/.
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JULY
1997
Slurry Displacement Piles
9-16
Figure 9-8: Bentonite Slurry
Attapulgite comes from a clay mineral that is native to Georgia. It is processed from the clay
mineral Palygorskite, and is similar in structure to Bentonite. However, it does not hydrate
in water and will not flocculate in the presence of acids and ionized salts and can be used in
ground formations where salt water is present. Due to the expense of transport and the
relative rarity of use of this type of drilling slurry in California, it is unlikely that this type of
mineral slurry will be encountered on Caltrans projects.
Mineral slurries stabilize the sides of the drilled hole by positive effective stress and by
filtration. Mineral slurries will penetrate deeper into more open formations, such as gravels,
and will form thicker filter cakes in these formations. While filtration is desirable, a thick
filter cake is not desirable because it is necessary to remove it before concrete placement.
Continuous agitation or recirculation of the mineral slurry will help reduce the thickness of
the filter cake by reducing the amount of suspended material in the mineral slurry.
The contract specifications require the removal of “caked slurry” from the sides and bottom
of the drilled hole before concrete is placed. Office of Structure Construction policy is that
“caked slurry” is considered to be an excessively thick filter cake that has formed on the
sides or bottom of the drilled hole. Because the amount of filter cake that forms on the sides
and bottom of the drilled hole is dependent upon so many variables and because research