About the ground surface collapse event near the construction site of the Tokyo outer ring road (Kan-etsu-Tomei)

About the ground surface collapse event near the construction site of the Tokyo outer ring road (Kan-etsu-Tomei)

Tokyo Gaikan Tunnel Construction Review Committee Expert Committee

About the progress of work and investigation on the surface depression of Chofu City

About maintenance measures associated with the shutdown of the shield machine

東京外かく環状道路工事現場付近での陥没事象等に関する説明会

About the house interim survey accompanying the Tokyo outer ring road project

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