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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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Foundation Investigations
July 1997
1-5
The appearance and feel of the cuttings, difficulties or changes of the rate of advancement
of the drilling tools, and other observations help the Engineering Geologist to estimate the
strengths of the soil or rock layers. These observations are noted within the field logs. Any
groundwater encountered during the drilling operation is also noted and special care is
taken to accurately determine its elevation. The Engineering Geologist also determines
whether or not the groundwater encountered is “perched” or in an “artesian” condition.
These observations along with the various field and laboratory testing assist in the develop-
ment of the soil/rock profile.
Two of the most important facets of the subsurface drilling operation are the recovery of soil
samples retrieved during the drilling operations and the in-situ soil tests.
Soil samples are divided into two categories, disturbed and undisturbed. Disturbed soil
samples are those which have experienced large structural disturbances during the sam-
pling operation and may be used for identification and classification tests. Undisturbed
samples are those in which structural disturbance is kept to a minimum during the
sampling process. Undisturbed samples are used for consolidation tests and strength tests.
Examples of these tests are direct shear, triaxial shear, and unconfined compression tests.
The strength tests provide shear strength design parameters which are used in static
analysis for pile foundations. Consolidation tests provide parameters needed to estimate
settlements of spread footings or pile groups.
The most common method of retrieving a disturbed soil sample is with the split spoon
sampler. The split spoon sampler is used for the Standard Penetration Test. As previously
stated, disturbed samples, such as those retrieved from the split spoon sampler, are mainly
used to assist in the soil classification and final identification of the soil.
Several types of soil samplers are used to retrieve undisturbed samples during subsurface
investigations. Types include the California Sampler (which is used by the Office of Struc-
tural Foundations), the Shelby Tube, the Piston Sampler, and the Hydraulic Piston Sampler.
Undisturbed soil samples provide the Engineering Geologist the best opportunity to evaluate
the soil in its natural undisturbed state. This type of sampling usually provides the most
accurate soil parameters once tests are performed.
In-situ tests are needed to provide soil parameters for the design of structure foundations,
especially when standard drilling and sampling methods cannot be used to obtain high
quality undisturbed samples. Undisturbed samples from non-cohesive soils are difficult to
obtain, trim, and test in the laboratory. Soft saturated clays, saturated sands and intermixed