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Transcript of 05 Barrett - Case studies in shallow landslide
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Case Studies in Shallow Landslide
Repair
in
Sensitive
Coastal
and
Riparian Areas
Colby
Barrett,
Soil
Nail
Launcher,
Inc.
Outline• Technology
overview
– Launched
Soil
Nails
– Hollow Core Injection Anchors
– Surface
Treatments
• Structural Wire Mesh
• Shotcrete
• Case
Studies – Lewiston,
MT
Missile
Base
(WFLHD)
– Crescent
City,
CA
(Del
Norte
County)
– Highway
1
Near
Pescadero,
CA
(CalTrans)
– Lake
Tahoe
Bluff
Stabilization
(Private)
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Original vessel developed by the British during war time.
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A machined tip is welded to the end of the nail, then plastic collars are
attached.
The air is built-up and the rod is launched at approx. 350 kph/250 mph.
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Landslide in dry conditions, FOS>1.0
Perched
Water
Table
Due
to
Meteoric
Infiltration, FOS>1.0
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Traditional Soil NailSuperNail®
Grout
Galvanization
Steel
Epoxy
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Lake Lida, MN
Sand
e0=0.74
N-Values = 4-8Unit Weight = 120 pcf
Average Nail Penetration = 19-ft
Pullout
Results
Average bond = 3.1 psi (ungrouted); 11.5 psi
(grouted)
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SURFACE TREATMENTS
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