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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
4-6
Figure 4-4: General Shear Failure Concept
General shear failure for the most part is sudden and catastrophic. Although bulging of the
ground surface may be observed on both sides of the footing at a stress level below failure,
failure usually occurs on one side of the footing. For example, an isolated structure may tilt
substantially or completely overturn. A footing restrained from rotation by the structure will
increase structure moments (stresses) and may lead to collapse or excessive settlement.
Punching shear failure (Figure 4-5)
presents little, if any, ground surface evi-
dence of failure, since the failure occurs
primarily in soil compression immediately
beneath the footing. This compression is
accompanied by vertical movement of the
footing which may or may not be observed,
i.e., movement may be occurring in small
increments. Footing stability (no rotation) is
usually maintained throughout failure.
Local shear failure (Figure 4-6) may exhibit
both general and punching shear character-
istics, soil compression beneath the footing, and possible ground surface bulging.
Refer to Figure 4-7 for photographs of actual test failures using a small steel rectangular
plate (about 6 inches wide) and sand of different densities.
Figure 4-5: Punching Shear Failure