Presentation Information

[VI-627]Develop of small diamater lightweight steel pipes in auxiliary method of mountain construction and report on field demonstration test results.

*Kota Yasunaga1, Yoshimichi Asai1, Jun Agata2, Motonori Kameyama3 (1. Katecs Corporation, 2. Nippon Steels Corporation, 3. Kameyama Corporation)

Keywords:

Mountain tunnel,Auxiliary method,Presupport,Face bolt,labor saving,Carbon neutral