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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
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http://www.rembco.com/.
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JULY
1997
Cast-In-Drilled-Hole Piles
6-16
CALTRANS FOUNDATION MANUAL
The following casing removal problems can cause pile defects:
ITEM
CASING REMOVAL PROBLEM/PILE DEFECT
1
The Contractor waits too long to pull the casing during concrete
placement. This may result in three problems: (1) the concrete sets up and
comes up with the casing as shown in Figure 6-17(a), (2) the concrete sets
casing cannot be removed as shown in Figure 6-17(b), and (3) the concrete
sets up enough so that it cannot fill the voids left by the casing as it is
removed, as shown in Figure 6-17(c). The first problem may result in a void
being formed in the pile at the bottom of the casing. It is possible that the
suction created may cause a cave-in at this location. The second and third
problems result in the loss of the pile's capacity to transfer skin friction to
the ground.
Historically, problems with casings have produced the largest number and the worst type of
CIDH pile defects. However, these problems are preventable. Adherence to the contract
specifications and timely inspection will prevent most of these problems. It is recommended
to allow the penetration value of the concrete placed in the pile to be at the high end of the
allowable range. Research has shown that concrete with higher fluidity will consolidate and
fill in the voids better than concrete with lower fluidity. To further prevent CIDH pile defect
problems when casings are used in construction the CIDH pile contract specifications have
been revised so that all CIDH piles constructed with the use of temporary casings will be
tested for structural adequacy prior to acceptance. The pile testing methods used to test piles
constructed by the slurry displacement method (as described in Chapter 9 of this manual)
would be used in this circumstance.