COMPOSITE SELF-DRILLING SOIL NAIL AND METHOD
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United States of America Patent
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app pub date -
Aug 15, 2012
filing date -
Mar 29, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A subsurface support comprises a soil nail having an outer member and an inner member placed within the outer member. Features are provided to maintain a uniform spaced relationship between the inner and outer members. The spaced relationship may be achieved by crimping the outer member, or by use of an insert installed between the inner and outer members. In another embodiment, the support is made of composite construction materials, and having a self-drilling capability. The outer member may be fiberglass, and a metallic drill bit may be secured to a distal end of the soil nail. The inner member is preferably steel. A method is also provided to improve pull-out capacity by galvanizing the inner and outer members.
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