| 摘要 |
PROBLEM TO BE SOLVED: To prevent a back-filling material from being solidified sticking into an injection pipe in a shield tunneling method and to easily dissolve trouble at the occurrence of trouble. SOLUTION: This back-filling material injection device is provided with a base part 6 composed of a back-filling material supply system, a washing water supply system, and a confluence pipe of these systems; a tube 7 made of an elastic flexible material connected to the confluence pipe; a pressing rod 8 pressing to squeeze the required range of the tube; and an operating mechanism 9 for moving the pressing rod in a tube squeezing direction. The back-filling material supply system is composed of two systems which are an A-liquid supply system and a B-liquid supply system. A B-liquid injection pipe 10 connected to the B-liquid supply system is made of an elastic flexible material and inserted close to the tip in the tube, and a piece 11 for squeezing a part of the tip of the tube is provided in a position between the tube tip and the B-liquid injection pipe tip. A locking means 12 is provided for holding the tube squeezing state of the piece and releasing the hold of the piece at the operation termination of the operating mechanism. COPYRIGHT: (C)2005,JPO&NCIPI
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