山岳トンネル(2)

10:40 AM - 10:50 AM JST(1:40 AM - 1:50 AM UTC)

[VI-109] Pre-drainage Countermeasures for Tunnel Excavation in Water-bearing Unconsolidated White Tuffaceous Silt Layers

*Ryo Hemmi¹, Kenji Saikawa², Kazuhiro Koiwa¹, Takuya Todate¹, Daiki Yoshida¹, Dohta Awaji¹ (1. Shimizu corporation, 2. Aomori River and National Highway Office, Tohoku Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism)

Keywords:

Shirasu soil,White tuffaceous silt layer,Muding,Lake Towada,Drainage boring