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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
7-46
time, they can be dwarfed by the size of the pile. This can result in a situation analogous to
driving a large spike with a tack hammer.
Hard driving can also be the result of a pressure bulb developed near the pile tip. This can
occur in saturated sandy materials. Driving in stages is a suggested remedy for this situa-
tion.
Soil consolidation due to cluster driving of displacement piles frequently causes hard
driving problems. A revised driving sequence often will alleviate this problem. This can
often be a trial and error process. Driving from one side of the footing in a uniform heading
helps. Driving from the center in a uniform outward pattern also can be helpful.
There are many factors which could contribute to hard driving and there are many solu-
tions.
Because of the many variables involved, each hard driving problem must be evaluated on
its own merit. There is no substitute for engineering judgement in this area. It should also
be remembered that these are not infrequent problems and there is a broad base of experi-
ence to draw from within the Office of Structure Construction.
Occasionally, pile penetration to the specified tip elevation may not always be accom-
plished, despite the Contractor’s best efforts. When this situation occurs, the Engineer may
consider accepting piles that are not driven to specified tip. This solution, while it may solve
the construction problem, may present administrative problems that will require resolution.
Situations have been experienced where the foundation design was changed, during
construction, from a driven pile foundation to another type of footing. Prior to making a
decision to accept piles that are not driven to specified tip, or initiating a change in footing
design, discuss the problem in detail with the Bridge Construction Engineer and, depending
on the results of the discussion, with the Engineering Geologist and the Project Designer.
Soft Piles and Retap
In this situation, the pile has been driven to the specified tip elevation but the specified
bearing value, as determined by the ENR formula, has not been obtained. The Standard
Specifications require the Contractor to satisfy both requirements.
Following are some ground conditions that may produce soft driving: