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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
Slurry Displacement Piles
9-42
Once a pile has been determined to be defective, the Contractor has several options. The
defect can be accessed and repaired, the pile can be supplemented, the pile can be replaced,
or the Contractor may propose a solution that allows the pile to remain in place. For
whatever solution the Contractor proposes, additional investigation will be necessary to
determine the nature and extent of the defect. Other methods of pile testing, such as cross-
hole sonic logging or coring, may be used to perform this investigation. An investigation of
the ground formation will also be necessary since potential pile rebar corrosion will be a
major concern. These investigations are to be performed by the Contractor at the
Contractor’s expense. With the additional information, the Contractor can propose a
solution that may not require access to the defect or replacement of the pile. Methods of
repair that would not require the defect to be exposed include the placement of supplemen-
tal piles and the use of pressure grouting. If a supplemental pile is proposed, the Engineer
should keep in mind that corrosion of the existing pile rebar that may be exposed to the soil
may be a concern. The Contractor must investigate the corrosive nature of the soil at the
site of the defect before the existing pile can be assumed to have any capacity in combina-
tion with a supplemental pile. Pressure grouting is usually most effective as a means of
improving the quality of the concrete at the tip of the pile. Any proposal made by the
Contractor should be investigated by the Office of Structure Design and the Office of
Structural Foundations to ensure that the pile will have sufficient structural and
geotechnical capacity before approval is given.
Safety
Safety concerns to be considered during the construction of CIDH piles by the slurry
displacement method are similar to those to be considered when CIDH piles are constructed
by ordinary means. For specific information, refer to Chapter 6 of this manual. However,
there is one additional item that requires further attention, which is the drilling slurry itself.
Some of the components of drilling slurries, especially chemical additives, are considered to
be hazardous materials. It is advisable to avoid skin contact and to avoid breathing in
vapors. The Construction Safety Orders require the Contractor to provide Material Safety
Data Sheets (MSDS) for all drilling slurries and chemical additives. The Engineer should
obtain these MSDS sheets as part of the submittal for the pile placement plan. During the
tailgate safety meeting prior to CIDH pile construction, be sure to discuss the contents of the
MSDS and discuss how the safety precautions will be adhered to by Caltrans employees, the
Contractor’s employees, and any manufacturer’s representatives that may be present.