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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
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including
insurance mortgage, in our performance, in our
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geotechnical contracting industry. Please
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9
CHAPTER
JULY
1997
CALTRANS FOUNDATION MANUAL
9-1
Slurry Displacement
Piles
Introduction
A slurry displacement pile is a Cast-In-Drilled-Hole (CIDH) pile whose method of construc-
tion differs from the usual CIDH pile in that a drilling fluid is introduced into the excava-
tion concurrently with the drilling operation. The drilling fluid, also referred to as slurry or
drilling slurry, is used to prevent cave-in of unstable ground formations and intrusion of
groundwater into the drilled hole. The drilling slurry remains in the drilled hole until it is
displaced by concrete, which is placed under the drilling slurry through a rigid delivery
tube.
Because the slurry displacement method is a specific construction method for the construc-
tion of CIDH piles, the reader is advised to review Chapter 6 of this manual. Chapter 6
contains information about inspection duties and responsibilities of the Engineer for
construction of CIDH piles. This chapter contains modifications of inspection duties and
responsibilities of the Engineer as necessary for the construction of CIDH piles using the
slurry displacement method.
History
The use of drilling slurry is commonly associated with methods used by the oil well drilling
industry over the last 100 years, which naturally provided much of the technical and
practical knowledge concerning their use in drilled foundation applications. Use of the
slurry displacement method for constructing drilled shafts began in Texas in the years
following World War II. This early method involved the use of soil-based drilling slurries to
advance the drilled hole, after which a casing was used to stabilize the drilled hole for shaft
construction. In the 1960’s, processed clay mineral slurry was introduced as a means of
eliminating the need for casing to stabilize the drilled hole. However, the properties of the