TUNNEL EXCAVATOR

• Main Authors: UCHIHASHI SHUICHI, IMAI TETSUYA, KONDO YOSHIYA, SAITO MANABU, OBAYASHI HIROHIKO, IGUCHI YASUO, MIZUNO HIDEO, KOGA HIROSHI
• Format: Patent
• Language: English; Japanese
• Published: 30.06.2023
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

To provide a tunnel excavator having a sediment sampling device for sampling excavated sediment at a position separated from a partition wall in a chamber, without affecting properties of the excavated sediment.SOLUTION: A partition wall 13 of a tunnel excavator 1 is provided with a sediment sampling device 100. The sediment sampling device 100 has: a first passage 21 having a first opening 21a at a tip end of a fixed blade 13a; a second passage 22 branched from the first passage 21 and having a second opening 22a at a rear part in an axial direction from the partition wall 13; a plug member 31 slidably provided in the first passage 21; a moving mechanism 32 for sliding the plug member 31 in the first passage 21 in such a way that at least a front end of the plug member 31 straddles a branching position P1 of the first passage 21 and the second passage 22; and a first on-off valve 41 provided on the first opening 21a side in relation to the branching position P1 in the first passage 21 and capable of opening/closing the first passage 21.SELECTED DRAWING: Figure 2 【課題】チャンバ内において隔壁から離隔した位置の掘削土砂を当該掘削土砂の性状に変化を与えることなくサンプリングする。【解決手段】トンネル掘削機１の隔壁１３には、土砂サンプリング装置１００が設けられており、土砂サンプリング装置１００は、固定翼１３ａの先端部に第１開口２１ａを有する第１流路２１と、第１流路２１から分岐し、隔壁１３よりも軸方向後方に第２開口２２ａを有する第２流路２２と、第１流路２１内に摺動可能に設けられる栓部材３１と、栓部材３１を、栓部材３１の少なくとも前端が第１流路２１と第２流路２２との分岐位置Ｐ１を跨ぐように、第１流路２１内で摺動させる移動機構３２と、第１流路２１のうち分岐位置Ｐ１に対して第１開口２１ａ側に設けられ、第１流路２１を開閉可能な第１開閉弁４１と、を有する。【選択図】図２