Hydraulic and earth engineering – Earth treatment or control – Rock or earth bolt or anchor
Patent
1994-07-20
1996-08-13
Buiz, Michael Powell
Hydraulic and earth engineering
Earth treatment or control
Rock or earth bolt or anchor
E21D 2002
Patent
active
055449816
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention-relates to a capsule for use in fixing an anchor bolt to a base, such as concrete, a rock bed or the like. More particularly, the present invention is concerned with a capsule for use in fixing an anchor bolt, which comprises (1) a casing having a sealed construction or a fluid-tight construction, (2) a curable resin composition, contained in the casing, comprising an epoxy acrylate resin composed mainly of an ester of an epoxy resin with (meth)acrylic acid, and a reactive monomer, wherein each of the epoxy acrylate resin and the reactive monomer has a specific gravity equal to or greater than the specific gravity of sea water, (3) a curing agent for the curable resin composition, disposed in association with the casing and in isolation from the curable resin composition, wherein the curing agent comprises an organic peroxide, and (4) a surfactant contained in at least one member selected from the group consisting of the curable resin composition and the curing agent, or disposed in association with the casing and separately from the curable resin composition and the curing agent, wherein the primary casing is breakable by the action of an anchor bolt when the anchor bolt is driven into the capsule.
Generally, in using a capsule comprising a casing, a curable resin composition contained therein, and a curing agent disposed in isolation from the resin composition, a hole is drilled in a base and the capsule is inserted into the hole. Then, an anchor bolt is driven into the hole. The capsule is broken by the driven anchor bolt, thereby allowing the curable resin composition to be reacted with the curing agent, so that a cured resin is formed and the inserted anchor bolt is fixed to the base. By virtue of the specific construction of the capsule of the present invention, wherein a surfactant is used in addition to a combination of a curable resin composition and a curing agent disposed in isolation from the curable resin composition, and wherein each of the main components of the curable resin composition has a specific gravity equal to or greater than the specific gravity of sea water, not only does it become possible to stably fix an anchor bolt to a base located in sea water or water, or to a base located on a shore, with high strength, but also it is unlikely that any portion of the Curable resin composition will escape and float to the surface of the sea. Thus, the anchor bolt-fixing work can be safely done without a danger of polluting the sea.
BACKGROUND ART
The term "anchor bolt" as used herein is intended to mean a bolt which is used in fixing a machine or other structures to bases, such as a rock bed, concrete and masonry.
Heretofore, various methods have been known for fixing an anchor bolt to a base. For example, one of the known methods is as described below. A hole is drilled in a base and a capsule comprising a casing, a thermosetting resin contained therein, e.g., an unsaturated polyester resin, and a-curing agent for the thermosetting resin disposed in isolation from the thermosetting resin, is inserted into the hole. An anchor bolt is driven into the hole by means of a hammer drill which has been coupled to the rear end of the bolt. The capsule in the hole is broken by the rotary percussion of the anchor bolt during the driving thereof, allowing the thermosetting resin to be reacted with the curing agent, so that a cured resin is formed and the inserted anchor bolt is fixed to the base. (See Examined Japanese Patent Application Publication No. 38-12863.)
However, the above-mentioned method has drawbacks in that when an anchor bolt is fixed to a base located in sea water or water, or to a base located on a shore, a reactive monomer component, e.g., a styrene monomer component, of the curable resin composition escapes and floats to the surface of the sea, thereby polluting the sea. Further, there is also a problem in that the escape of the reactive monomer leaves a portion of the resin remaining intact and uncured. This uncured resin sinks to the botto
REFERENCES:
patent: 3108443 (1963-10-01), Schuermann et al.
patent: 4103771 (1978-08-01), Klatt et al.
patent: 4341301 (1982-07-01), Meyer et al.
patent: 4353463 (1982-10-01), Seemann
patent: 4402633 (1983-09-01), Self
patent: 4443567 (1984-04-01), Sternisa et al.
patent: 4475998 (1984-10-01), Okitsu et al.
patent: 4729696 (1988-03-01), Goto et al.
patent: 4906684 (1990-03-01), Say
patent: 4907917 (1990-03-01), Liebhard
patent: 5069581 (1991-12-01), Kistner et al.
patent: 5080531 (1992-01-01), Kistner et al.
Kai Shoichiro
Nishida Seiji
Asahi Kasei Kogyo Kabushiki Kaisha
Buiz Michael Powell
Lagman Frederick L.
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