| 摘要 |
PROBLEM TO BE SOLVED: To provide a packing capable of preventing cavitation from occurring at the joint of embedded forms which are adjacent to each other in the longitudinal direction of a tunnel. SOLUTION: This packing 2 is installed at the joint 7 of embedded forms which are connected to each other in the longitudinal direction of a tunnel 1 among the joints of a plurality of embedded forms 6 laid down in the tunnel which are connected to each other in the longitudinal direction and the circumferential direction of the tunnel so as to hold the ends of the embedded forms 6 from the inner peripheral surface 6a side and the outer peripheral surface 6b side. The packing 2 includes a head part 3 provided so as to project to the inner peripheral surface 6a side of the embedded forms 6, a leg part 5 provided so as to project to the outer peripheral surface 6b side of the embedded forms 6, and a connection part 4 one end of which is connected to the head part 3 and the other end of which is connected to the leg part 5. COPYRIGHT: (C)2010,JPO&INPIT
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