Widening device and widening method for existing tunnel



【課題】施工能率の向上。 【解決手段】拡幅装置10は、既設トンネルAの外周側に拡幅した拡幅トンネルDを構築する際に用いられ、先行架台12と、後行架台14と、移動ステージ16と、拡幅作業用機材18と、移送装置20と、移動装置22とを備えている。架台12は、拡幅トンネルの切羽面と対向配置され、トンネル軸方向に沿って移動可能になっている。架台14は、架台12の後方に隣接設置され、トンネル軸方向に沿って移動可能になっている。ステージ16は、架台14の天井部に、トンネル周方向に沿って移動自在に設けられている。機材18は、架台14の天井部にトンネル軸方向に沿って、移動自在に搭載されている。移送装置20は、拡幅工事の進行に伴って機材18を選択して、架台14からステージ16に移送搭載させる。移動装置22は、ステージ16に搭載された機材18を拡幅作業が可能な状態で、トンネル周方向に沿って移動させる。 【選択図】 図1
<P>PROBLEM TO BE SOLVED: To provide a widening device and a widening method for an existing tunnel, which are improved in working efficiency. <P>SOLUTION: The widening device 10 is for use in constructing a widened tunnel D on an outer peripheral side of an existing tunnel A, and formed of a leading stand 12, a trailing stand 14, a moving stage 16, widening work equipment 18, a transfer device 20, and a moving device 22. The stand 12 is arranged so as to be opposed to a working face of the widened tunnel and movable along a tunnel axial direction. The stand 14 is arranged adjacently to the rear of the stand 12, and movable along the tunnel axial direction. The stage 16 is arranged on a ceiling portion of the stand 14 in a manner movable along a tunnel circumferential direction. The equipment 18 is mounted on the ceiling portion of the stand 14 in a manner movable along the tunnel axial direction. The transfer device 20 selects pieces of the equipment 18 according to the procedure of widening works, and transfers the selected pieces from the stand 14 to the stage 16 to be mounted on the same. The moving device 22 moves the selected pieces of the equipment 18 mounted on the stage 16 along the tunnel circumferential direction while setting the selected pieces in a readily available state for the widening works. <P>COPYRIGHT: (C)2005,JPO&NCIPI




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    WO-2008034415-A1March 27, 2008Gta Maschinensysteme GmbhMobile einhausung mit vortriebsaggregaten