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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,
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foundation repair
and support,
grouting,
soil nails,
rock drilling,
micropile installations, and
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use a
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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
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mini piles,
sinkhole repair,
micropiles,
acrylamide grouting, and
soil nailing.
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insurance mortgage, in our performance, in our
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geotechnical contracting industry. Please
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http://www.rembco.com/.
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Cast-In-Drilled-Hole Piles
JULY
1997
6-13
The following concrete placement problems can cause pile defects:
ITEM
CONCRETE PLACEMENT PROBLEM/PILE DEFECT
1
A cave-in at a location above the top of concrete or sloughing material from
the top of the drilled hole occurs during concrete placement. This can result
in degraded concrete at the location, thus reducing the capacity of the pile.
This defect is shown in Figure 6-13.
2
The Contractor tailgates concrete into the drilled hole without the use of a
hopper or elephant trunk to guide it. The concrete falls on the rebar cage or
supporting bracing and segregates. This can result in defective concrete,
thus reducing the capacity of the pile. This defect is shown in Figure 6-14.
3
A new hole is drilled adjacent to a freshly poured pile or concrete is placed in
a drilled hole that is too close to an adjacent open drilled hole. This can
result in the sidewall blowout of freshly poured piled into the adjacent
drilled hole. This would probably cause the rebar cage to buckle. This defect
is shown in Figure 6-15.
4
The Contractor does not remove groundwater from the drilled hole. This
groundwater mingles with the concrete placed and may result in defective
concrete at the bottom of the pile. If the pile is designed for end bearing, the
capacity would be reduced. This defect is shown in Figure 6-16.
Most of these problems are preventable. Adherence to the contract specifications and timely
inspection will prevent most of these problems. However, if a cave-in occurs during concrete
placement, the Contractor may need to remove the rebar cage and concrete, and then start
over.