About the depression of the ground surface near the construction site of the Tokyo outer ring road (Kan-etsu-Tomei) [8th report]

November 5, 2020
East Nippon Expressway Co., Ltd. Kanto Regional Head Office

Tokyo Outer Ring Road (Kan-Etsu-Tomei) Main Line Tunnel (Southbound) Regarding the underground cavity confirmed by the ground survey around the ground surface depression that occurred near the construction site, "Tokyo Outer Ring Tunnel Construction Review Committee" "Expert Committee" was held.
Please see here for an overview of the results.