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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
Driven Piles
7-48
2 per footing). However, when retap requirements are not listed in the Special Provisions, it
is up to the Engineer to determine what criteria will be used to determine pile acceptability.
At times piles will not attain minimum bearing at specified tip, even if retapped. In these
cases the Contractor is obligated to furnish longer piles to accomplish the work. While this
situation rarely happens with precast concrete piles, prudent contractors will drive “test”
piles at various locations on the job to confirm lengths prior to ordering piles. This should
be suggested to the Contractor before work starts. In the case of steel “H” piles, this situation
happens frequently. If overdriving is excessive, lugs or “stoppers” can be welded on the pile
to mitigate the problem. If lugs are not required by the contract, they can be added by
change order. Bridge Construction Memo 130-5.0 covers this problem in detail.
Alignment of Piles
Watch the alignment of each pile. This is extremely important if swinging leads are used.
Immediate correction should be made if the pile begins to move out of plumb. Driving may
have to be stopped and the pile may have to be pulled and redriven.
The Standard Specifications state that piles materially out of line will be rejected. This
brings up the question as to what is “materially out of line”. Some contracts have a specific
tolerance in the Special Provisions as to alignment and/or plumbness of the piles. This is
usually due to special considerations in the design of the structure. Each situation should
be analyzed separately and “engineering judgment” used in making final determination as
to the acceptability of any misaligned piles.
Overdriving
Occasionally the Contractor will want to overdrive prefabricated piles to avoid cutting piles
to grade. This can be allowed in some circumstances. However, no payment is allowed for
the additional length driven below the specified tip elevation. This subject is covered by
Bridge Construction Memo 130-6.0.
Safety
The potential for an accident around pile driving is probably greater than for any other
construction operation. The pile rig with a set of heavy leads and hammer is unwieldy
enough; add a long pile and a high potential for danger exists. Add a hammer in operation