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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
7-42
Early contact with Transportation Laboratory representatives in either Los Angeles, Berkeley,
or Sacramento is encouraged as they can be very helpful. Reference should also be made to
Section 180 of the Bridge Construction Records and Procedures manual.
Timber Piles
Check the butt and tip diameters to ensure compliance with Section 49-2.01 of the Stan-
dard Specifications. Treated timber piles shall be driven within 6 months after treatment.
Piles shall have protective steel straps at 10-foot centers. Three additional straps are placed
at the tip and two at the butt. Straps are to be approximately 1
1
/
4
inches wide and 0.3 inch
in nominal thickness per Section 49-2.03 of the Standard Specifications.
The Contractor is also required to restrain the pile during driving from lateral movement at
intervals not exceeding 20 feet measured between the head and the ground surface. Make
sure the Contractor is equipped for this.
Logging of Piles
It is Office of Structure Construction policy to log at least one pile, in it’s entirety, per
footing. There are advantages to doing a more comprehensive logging of the piles. One
situation is when, during easy driving, the piles are not achieving the necessary blow counts
at specified tip. The Contractor will request to retap them later. A good log of the piles within
the footing will help the Engineer to determine how many piles might require a retap to
prove bearing. If all the piles drove in a similar manner, it might be possible to retap as few
as 10% of the piles that did not originally achieve bearing. If the piles all drove differently, a
retap of all of the piles may be required. The following is a discussion of factors affecting
pile log data.
Typically when driving begins, the driving resistance of the pile is very low. The stroke of the
hammer will be proportional to this pile resistance (low resistance equals low rebound
energy). As a result, the energy delivered to the pile will be different from the
manufacturer’s rated energy value. Keeping careful track of blows per foot and actual stroke
is necessary. If this difference is not taken into account, the log will be misleading when the
values are put in the ENR formula and bearing values are computed at various depths of
driving. This procedure should be followed all the way to the final tip penetration.