ANCHOR BOLT MADE OF SYNTHETIC RESIN

Japanese Patent JP3486029

B2

PROBLEM TO BE SOLVED: To reinforce the ground stably by displaying extremely large tensile yield strength when this anchor bolt is fixed onto the ground and preventing the ground collapse of the face of a slope of a tunnel excavating ground and a bedrock.
SOLUTION: An anchor bolt body 1 is made of FRPs and a helical projection 2 is formed extending over the overall length of the surface of the anchor bolt body 1, and the anchor bolt body 1 is inserted into a pit 12 bored to the ground and fixed by the filling of a curable material 13 such as mortar. This anchor bolt is fixed firmly through the helical projection 2 while the base end section of the anchor bolt body 1 projected from a ground surface is covered with a cap body 4 made of steel, in which helical channels 5, 6 are formed to inner and outer circumferential surfaces, and the inside of the cap body 4 is filled with an aluminum-powder mixed epoxy resin adhesive 11. Accordingly, the helical projection 2 of the anchor bolt body 1 and the helical channel 6 of the cap body 4 are unified firmly by anchor action to the epoxy resin adhesive 11 of both the helical projection 2 and the helical channel 6 while both tips of a pin 10 penetrated and fitted in the radial direction to the anchor bolt body 1 are engaged with engaging holes 7, 8 bored to both side sections of the cap body 4, and drawing yield strength is increased.

JP4173511

Lock bolt and lock bolt installation method

Hitoshi Furukoshi
Junji Kobayashi
Kazuhisa Yoshizawa
Toh Furukawa
Akira Koga
Toru Hanuma

JP30077995A

January 13, 2004

October 24, 1995

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THE TOKYO ELECTRIC POWER COMPANY,INCORPORATED
Okumura Gumi Co., Ltd.
KFC Inc.

E21D20/00; (IPC1-7): E21D20/00

JP62182400A
JP341181A
JP5718484B2

Takuya Yamamoto

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