YOOSHIN pursues co-existence between human and nature.
YOOSHIN provides planning and design services for ultra long, large-sectioned, soft-ground, and under-river tunnels and other types as well using various tunneling technologies such as the shield TBM method. YOOSHIN leads the development of domestic tunnel technologies through consistent R&D activities, technical supports for the tunnel construction supervisions and construction performance analysis. Performed the nation’s first shield tunnel design in the 1980's, it boasts various project experiences: the Gyeongbu High-speed Railway Tunnel, the Solan Tunnel of Yeongdong Expressway (the largest road tunnel in Korea: L=16.2km), the Shield Tunnel under the Han River (Bundang Railway Line from Wangsipri to Cheongdam), and the Three-Arch Tunnel (nation’s largest (W≒28m) passing under the Daejeon Subway Line No. 1.