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Composite self-drilling soil nail and method

a self-drilling, soil nail technology, applied in the direction of soil conditioning compositions, coatings, applications, etc., can solve the problems of inability to fully cure, inability to withstand corrosion, and the thickness of cementious may be very small, so as to achieve high corrosion resistance, simple lengthening of body, and cost-effective

Inactive Publication Date: 2013-08-15
R&B LEASING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a soil nail with improved properties. The soil nail has a fiberglass body with a metal tip, which increases its cost-effectiveness and resistance to corrosion. The metal tip is attached to the fiberglass body by a single piece of metal, making the soil nail more adaptable for different soil or rock formations without having to modify its body. The soil nail can be self-centered, meaning it can be easily installed without a launcher. Additionally, the soil nail can be self-drilled, meaning it can be installed by drilling. The use of the inner member also enhances the strength of the soil nail and compensates for weakening of the metallic coupler over time.

Problems solved by technology

If the soil nail is not centered and makes contact with the interior surface of the outer member, the inner member is subject to corrosion.
Additionally, if the inner member is spaced too closely to the interior surface of the outer member, there may be small voids or spaces that do not completely fill with cementious material and / or the cementious may have a very small thickness which is more susceptible to being fractured.

Method used

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  • Composite self-drilling soil nail and method
  • Composite self-drilling soil nail and method
  • Composite self-drilling soil nail and method

Examples

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Embodiment Construction

[0043]Referring to FIG. 1, the subsurface support 10 in a first embodiment of the present invention is shown installed in the ground G. The support device includes an outer member; preferably in the form of a steel or iron tube 12 having a selected length and diameter, and having an integral pointed tip 14. The tip 14 can be conical in shape that facilitates emplacement of the outer tube as by a launcher, as discussed below. After the outer tube is emplaced, the stabilizing mixture is placed in the interior chamber of the outer tube. Then, an inner support member that can be in the form of an epoxy coated steel rod or bar is then placed within the stabilizing mixture prior to hardening of the mixture. When the stabilizing mixture cures, the inner support member 16 can provide support to an overlying structure in compression, tension, and / or shear. Depending upon the design requirements of the particular structure to be built, a plurality of subsurface supports may be emplaced at des...

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PUM

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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.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation-in-part application of co-pending U.S. application Ser. No. 11 / 693,584, filed on Mar. 29, 2007 entitled “METHOD AND APPARATUS FOR CREATING SOIL ORROCK SUBSURFACE SUPPORT”, which is a continuation-in-part application of co-pending U.S. application Ser. No. 11 / 460,317, filed on Jul. 27, 2006, entitled “METHOD AND APPARATUS FOR CREATING SOIL OR ROCK SUBSURFACE SUPPORT”, which is a continuation-in-part of co-pending U.S. application Ser. No. 10 / 741,951, filed on Dec. 18, 2003, entitled “METHOD AND APPARATUS FOR CREATING SOIL OR ROCK SUBSURFACE SUPPORT”, the disclosures of these applications being hereby incorporated by reference herein in their entirety.FIELD OF THE INVENTION[0002]The present invention relates generally to subsurface supports placed in the ground, and more particularly, to a method and apparatus for creating soil or rock subsurface supports that can be used in multiple applications to includ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E02D5/80E02D7/02
CPCE02D7/02E02D5/80E02D5/808
Inventor BARRETT, COLBYRUCKMAN, TIMOTHY ALLEN
Owner R&B LEASING