| 摘要 |
PROBLEM TO BE SOLVED: To provide a tunnel construction method enabling compaction work of placed concrete to be easily carried out and high quality construction to be performed, and form vibrators.SOLUTION: A tunnel construction method includes the steps of: installing a slide center 1 in an excavated hole; placing ready-mixed concrete between the internal wall surface of the excavated hole and the slide center 1; and compacting the ready-mixed concrete by the vibration of vibrators 21 installed in a plurality of stages at the slide center 1. In a top end, the ready-mixed concrete is compacted by a higher operation frequency than that in a side wall part. The slide center 1 includes a form body 10; the vibrators 21 installed in the plurality of stages at the side face of the form body 10; and an inverter 22 for controlling the operation frequency of the vibrators 21. |
