| 摘要 |
PROBLEM TO BE SOLVED: To sufficiently fill concrete by projecting an outflow part capable of being flowed out by ready-mixed concrete filled into the space of the inside of a tunnel near the gable end of the crest part of form for tunnel lining or in the neighborhood thereof to the inside of the form for the tunnel lining. SOLUTION: When ready-mixed concrete is injected until it is flowed out from the outlet 25 of an outflow part 7 in a space 3 from the injection opening of a form for tunnel lining 5, pressure is applied on the ready-mixed concrete, the filling density of the ready-mixed concrete of the inside of the space 3 is heightened, and adhered to the inner wall face 1 of a tunnel. When an opening and closing cover 15 is rotated in the direction of an arrow (b), the ready-mixed concrete remaining in the outflow part 7 is pushed and returned to the inside of the space 3 and the ready-mixed concrete in the inside of the space 3 is pressurized, the ready-mixed concrete is filled into the crest part of a gable side. Furthermore, after the support material 75 of a support tool 65 is slid downward, an air tube 55 is removed and the set of the form for the tunnel lining 5 is released. Thereby the ready-mixed concrete can be sufficiently filled into the corners of the space.
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