山岳トンネル (13)

[VI-312] Construction of large sections and branch tunnels for operation preparation areas of a railway mountain tunnel by NATM

*Yousuke Takahashi¹, Hiroyuki Otsubo¹, Akira Ishikuro¹, Masamichi Shintaku¹, Yoshinori Koyama² (1. Shimizu Corporation, 2. Japan Railway Construction, Transport and Technology Agency)

Keywords:NATM, mountain tunnel, large section tunnel, branch tunnel, operation preparation area