Rockbolts made of steel pipes

Rockbolts made of steel pipes

A sleeve 10 for introduction of a pressurized fluid, which is attached to a rockbolt main body 1, comprises a cylindrical projecting part 11 of a large diameter and a bearing-plate-holding part 12 of a diameter smaller than an aperture of a bearing plate 6. The projecting part 11 and the bearing-pla...

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Hauptverfasser: KITTAKA TOSHIHARU, ITOU TETSUO, NAKATA MASAHIRO, SHIROMA HIROMICHI, IWASAKI TATSUROU, OOSHIMA KENJI, TANASE HIROYUKI, NAKAKO TAKEFUMI, YOSHIDA TAKEYUKI
Format: Patent
Sprache:eng
Schlagworte:
EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
LARGE UNDERGROUND CHAMBERS
MINING
SHAFTS
TUNNELS
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creator KITTAKA TOSHIHARU
ITOU TETSUO
NAKATA MASAHIRO
SHIROMA HIROMICHI
IWASAKI TATSUROU
OOSHIMA KENJI
TANASE HIROYUKI
NAKAKO TAKEFUMI
YOSHIDA TAKEYUKI
description A sleeve 10 for introduction of a pressurized fluid, which is attached to a rockbolt main body 1, comprises a cylindrical projecting part 11 of a large diameter and a bearing-plate-holding part 12 of a diameter smaller than an aperture of a bearing plate 6. The projecting part 11 and the bearing-plate-holding part 12 preferably has the same inner diameter. When the rockbolt main body 1 is embedded in a bedrock or ground, the bearing plate 6 locates on an edge of a rockbolt-setting hole of the bedrock or ground, and the bearing-plate-holding part 12 extends through the bearing plate 6 into the rockbolt-setting hole. Since the projecting part 11 and the bearing plate 6 are disposed on a sprayed concrete layer, a projection height of the rockbolt is remarkably decreased. Consequently, lining concrete 8 is applied onto the sprayed concrete layer with ease, and the bedrock or ground is reinforced with high reliability.
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subjects EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
LARGE UNDERGROUND CHAMBERS
MINING
SHAFTS
TUNNELS
title Rockbolts made of steel pipes
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