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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
7-34
CALTRANS FOUNDATION MANUAL
Driveability Study. In the Driveability Study, the wave equation analysis would be used
in the design phase. For this study, the user (as of now this would be someone from the
Office of Structural Foundations) will input a driving system model. The input information
consists of a typical hammer, cushion, soil characteristics, and length of pile; all of which is
generally referred to as the pile driving system.
The output of the analysis will tell the user if the pile is driveable. The output information
will include the internal stresses of the pile as it travels through the varying strata and as it
approaches a particular tip elevation. The output will also give driving rates for specific
hammers at specific elevations. The hammer input information is within a range for a
“typical hammer” that might be used. The soil information is based on information gained
from the Log of Test Borings for the particular site. All of the above input information is
refined for further uses in the wave equation. As a summary for this use, the Driveability
Study is one which is used by the Project Designer to help in choosing a foundation type.
Hammer Acceptance Study. The Hammer Acceptance Study would typically be done
after the contract is bid. This type of study requires information regarding all of the compo-
nents that a Contractor would propose to use for the installation of contract piles. This
information would be submitted to the user. The user inputs all of the submitted informa-
tion and, from the output of the program, determines if the hammer can drive the pile,
what the driving rate would be, and the user will be able to predict the internal stresses of
the driven pile. From this information, the Engineer can decide if the Contractor’s hammer
will drive the pile to tip without overstressing the pile. From the output information, the
Contractor might discover that the chosen hammer would not be efficient to use in a given
situation. The Contractor might choose to use a different hammer that might be more
efficient. The new hammer’s characteristics would be re-input and the output would be
studied for the previous stated reasons.
Acceptance Curve Study. For the Acceptance Curve study, the previous two studies are
completed. After the Contractor’s hammer is known, modeled and accepted, a pile would be
driven in the field. The driving of this pile would be monitored using Pile Dynamic Analysis
(PDA) equipment, which records a dynamic analysis using monitors attached to the driven
pile. After the pile is driven a static load test might be performed. Using information gained
from the PDA, the static load test and information from other analysis programs, the input
information for the WAVE analysis is refined to more closely model the hammer and soil
system characteristics. From the refined input, the WAVE output can be used to develop
acceptance curves, based on stroke, blow count and driving rate relative to a specific footing
location. The output would be used by the Engineer in the field to determine acceptance of
a driven pile. Refer to Appendix E for samples of acceptance curves.