| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the attaching labor and the waste of the material cost of an air bleeder pipe for venting generating remaining air at the time when the secondary lining of a tunnel is executed. SOLUTION: The air bleeder device in the secondary lining of a tunnel is for a secondary lining 4a after the primary lining 3 of the tunnel 1, a pipe 4a is laid in the primary lining 3, in the air bleeder device of remaining air generated at the time when mortar 7a is placed between the primary lining 3 and the pipe 4a, a vertically opening fixture 9 projected to the side of the primary lining 3 is screwed in the grout hole 8 of the pipe 4a, further, a vertically opening socket 10 is detachably fitted on the upper part 9c of the fixture 9, and an air bleeder pipe 11 is detachably fitted on the upper outside of the socket 10.
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