山岳トンネル (11)

[VI-289] Report on Tunnel Excavation on Thin Ridge and Small Overburden Section

*Yohei Chiba¹, Kensaku Nagai¹, Masashi Yasuno¹, Hitoshi Morisawa¹, Masaya Miura¹, Shouzou Suzuki¹, Tomihiro Tanaka² (1. TOKYU CONSTRUCTION CO., 2. Ministry of Land, Infrastructure, Transport and Tourism Kinki Regional Development Bureau)

Keywords:mountain tunnel, Auxiliary method, All Ground Fasten Method, grouting material, thin ridge