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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
Footing Foundations
4-24
Suitable Foundation Material
If the foundation material encountered at planned footing elevation is suitable, the
Contractor should be notified in writing of the Engineer’s decision.
Disturbed and/or Contaminated Material
A suitable foundation material encountered at planned footing elevation but disturbed or
contaminated is unacceptable and must be corrected. Disturbance of the foundation
bearing surface is invariably caused by the Contractor’s choice of excavation methods.
Often the bearing surface is disturbed simply by excavating below the footing elevation, and
occasionally the bearing surface is disturbed at grade by the teeth on the excavator bucket.
Contamination is usually due to water or sloughing.
All disturbed or contaminated material must be removed to expose a suitable foundation
surface. The foundation shall then be restored by the Contractor, at the Contractor’s
expense, to a condition at least equal to the undisturbed foundation as determined by the
Structure Representative.
Acceptable restoration methods include:
1) Maintain top of footing as planned and overform footing depth. With few exceptions,
the Contractor will choose this method when the restoration depth is about one foot or
less.
2) Replace the material removed (to planned bottom of footing elevation) with Class C (4
sack) concrete.
3) Footings having a design bearing pressure of not more than 3 TSF and where the depth
of the material removed does not exceed one foot, the bottom of footing may be
restored with structure backfill material compacted to 95% relative compaction.
Structure backfill material must meet the requirements of Section 19-3.06 of the
Standard Specifications.
It cannot be over-emphasized that the restored foundation must be at least equal to the
undisturbed foundation as determined by the Engineer.
It is recommended that the following precautionary measures be taken during excavation
and construction in order to avoid or minimize disturbance and/or contamination of the
foundation surface: