Japan Society of Civil Engineers 2026 Annual Meeting
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Session Details

Section VI

山岳トンネル(1)

Wed. Sep 2, 2026 8:50 AM - 10:10 AM JST
Wed. Sep 2, 2026 11:50 PM - 1:10 AM UTC
Room 25, 2nd Floor, Building 3 (Hokkai-Gakuen University)
8:50 AM - 9:00 AM JST(11:50 PM - 12:00 AM UTC)

[VI-100]Tunnel Excavation at a Steep and Narrow Portal Section

*Atsushi Kuge1, Yoshiaki Nakato1, Fuminori Asano1 (1. OBAYASHI CORPORATION)
9:00 AM - 9:10 AM JST(12:00 AM - 12:10 AM UTC)

[VI-101]Construction Study at Tunnel Portal in Steeply Sloped and Uneven Terrain

*Daisuke Kobayashi1, Ishida Takumi1, Akita Tetsushi3, Nagao Yuki3, Kikuchi Jun3, Oya Koudai2, Fukuda Tsuyoshi2 (1. Central Nippon Expressway Company Limited, 2. SHIMIZU CORPORATION, 3. Shimizu-Toa JV)
9:10 AM - 9:20 AM JST(12:10 AM - 12:20 AM UTC)

[VI-102]Measurement and Evaluation of the Effects of Tunnel Excavation on Portal Slopes and Surrounding Ground

*Tomohiro Tanaka1, Kazuya Miyamoto1, Hideaki Nishiura1, Yusuke Kinomura1, Katsunori Mochizuki1, Hiyoshi Takanabe2 (1. OBAYASHI CORPORATION, 2. East Nippon Expressway Company Limited)
9:20 AM - 9:30 AM JST(12:20 AM - 12:30 AM UTC)

[VI-103]Application of the Early Closure Method for Full-Section Excavation of the Phase II Tunnel, Taking into Account the Impact on the Phase I Tunnel

*Takumi Arai1, Naoki Hamada1, Takahiro Shirai1, Tsuyoshi Hukuda1, Kenji Sawai2 (1. SHIMIZU CORPORATION, 2. West Nippon Expressway Company Limited)
9:30 AM - 9:40 AM JST(12:30 AM - 12:40 AM UTC)

[VI-104]Construction Report on a Mountain Tunnel in a Shallow Overburden Fractured Zone

*Koji Hirakawa1, Youichi Mizobata1 (1. OKUMURA CORPORATION)
9:40 AM - 9:50 AM JST(12:40 AM - 12:50 AM UTC)

[VI-105]Verification of the effectiveness of ground improvement using uniform injection reinforced insert pipes.

*Takahiro MIZUNO Mizuno1, Akihito Iwamoto1, Yoshimichi Asai1, Junichi Nagata1 (1. katecs Co., Ltd.)
9:50 AM - 10:00 AM JST(12:50 AM - 1:00 AM UTC)

[VI-106]Trial Application of a Support Method Selection Sheet Using Excavation Data from a Small-Section Tunnel

*Ryuga Kina1, Yoshiharu Tanaka1, Fumiaki Matsusaki1, Tatsuhiko Otani1, Atsushi Iuchi1 (1. Nishimatsu Construction Co., Ltd)
10:00 AM - 10:10 AM JST(1:00 AM - 1:10 AM UTC)

[VI-107]Effect of the structural shape of H-steel on the load-bearing capacity of tunnel support

*Toshihiro Noguchi1, Naoya Nishihara1, Hisashi Hayashi2, Yasuyuki Okazaki3, Isamu Yoshitake4 (1. Mashino Co.,Ltd., 2. Setsunan University, 3. Hiroshima Institute of Technology, 4. Yamaguchi University)
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