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Micro Piles |
Pressure Grouting |
Prestressed 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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Tiebacks, Tiedowns, and Soil Nails
JULY
1997
11-13
Testing
You should refer to your contract documents for specific test requirements for your project.
The following is a general description of the required tests.
A pullout test consists of incrementally loading the test soil nail assembly to the maximum
test load or the failure point, whichever occurs first. The failure point is the point where the
movement of the test soil nail continues without an increase in the load or when the soil
nail creep rate exceeds 0.08 inch between 6 and 60 minutes. Movement of the soil nail end
shall be measured and recorded to the nearest 0.001 inch at each increment of load,
including the ending alignment load, relative to an independent fixed reference point.
The pullout test measuring the test load is applied to the test soil nail and measures the test
soil nail end movement at each load. Each increment of load shall be applied in less than
one minute and held for at least one minute but not more than two minutes. During the 10
minute load hold, the movement of the end of the soil nail shall be measured at 1, 2, 3, 4,
5, 6, and 10 minutes. After the 0.08 inch creep rate is established, the load is reduced to the
final alignment load, and then the soil nail is unloaded. If a test soil nail fails to attain the
maximum test load, one or all of the following procedures may be performed: (1) install
and test additional test soil nails if the initial test results are believed to be in error, (2)
determine if the cause is due to a variation of the soil conditions, installation procedure or
materials, or (3) reevaluate the soil properties if differing soil conditions are encountered
and redesign the wall if necessary. Any changes necessitated by failing tests shall be ap-
proved by the Project Designer.
Safety
The soil nail wall should be monitored during construction for movement and for signs of
failure. Occasionally, poor material will be encountered as the excavation continues
downward. This differing condition may require a change to the plans or safety provisions
in the construction method.