Vibration Compaction Method for Tunnel Lining Concrete

摘要

PROBLEM TO BE SOLVED: To provide a vibration compaction method of tunnel lining concrete which can further equalize the vibration acceleration of a tunnel lining framework in a tunnel excavation direction by verifying an installation position of a framework vibrator so that a smooth acceleration distribution is obtained by taking into consideration an influence by a reinforcing plate.SOLUTION: A reference acceleration distribution 13 in a tunnel excavation direction X of vibration acceleration is measured by installing a framework vibrator 11 in a reference position 12; a post-movement acceleration distribution 15 in the tunnel excavation direction X of the vibration acceleration is measured after moving the framework vibrator 11 in the tunnel excavation direction X from the reference position 12; an installation position of the framework vibrator in a more equal acceleration distribution is selected from these acceleration distributions 13, 15 as a proper installation position 16; and in a succeeding construction span, cast middle-flow concrete is compacted by installing the framework vibrator 11 at the selected proper installation position 16.