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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
9-2
mineral drilling slurries were not controlled. Initial information on the properties of
mineral drilling slurries was obtained from the Reese and Touma Research Report, which
was a cooperative research program conducted in 1972 by the University of Texas at Austin
and the Texas Highway Department. Due to the numerous failures that occurred, by the
mid-1970’s, more attention was paid to the physical properties of mineral drilling slurries
and appropriate methods of preparing and recirculating drilling slurries.
Because processed clay mineral slurries are considered to be environmentally hazardous
and are difficult to dispose of, in the 1980’s, the drilled shaft industry began a trend towards
the use of polymer drilling slurries. These drilling slurries are less hazardous to the envi-
ronment and are easier to dispose of.
There are still many unknowns about the use of drilling slurries, among them the effect of
the drilling slurry on the ability of a pile shaft to develop skin friction. Research done to
date has given conflicting results, most of which indicate that pile capacities may be less
than that of CIDH piles constructed without the use of drilling slurry. However, the design
method used by Caltrans for determining the pile capacity adequately accounts for the
potential loss of pile capacity when drilling slurry is used. Research funded in part by the
Federal Highway Administration (FHWA) is ongoing at the University of Houston. Caltrans
has also conducted research on several contracts in recent years, which has lead to the
development of revised contract specifications for use of the slurry displacement method of
CIDH pile construction.
CALTRANS first used the slurry displacement method on a construction contract in 1984 and
has used this method sporadically since then. However, a change in Caltrans seismic design
philosophy has resulted in the use of more and larger CIDH piles. Because of this, ground
conditions have become less of a factor in the pile type selection process. Other factors such
as lower construction costs and construction in an urban environment with restricted access
and noise limitations have also led towards the expanded use of CIDH piles. Because of
these factors, in 1994 Caltrans started inserting the slurry displacement method specifica-
tions into all contracts with CIDH piles.
Slurry Displacement Method
The slurry displacement method of construction is similar to that of ordinary CIDH pile
construction until groundwater or caving materials are encountered. When groundwater or
caving materials are encountered during the drilling operation, the Contractor must decide