무동력 배수시스템을 활용한 도상월류 및 라돈저감방안 연구

A Study on Drainage System of Non-motorized For Overtopping and Radon Reduction

Seoul Metropolitan Rapid Transit Corporation has 148's stations. Total length is 152km and most of the station is located in the basement and Groundwater occur inflow of 700,000 tons per day. Groundwater is treated as a natural flow way instead of artificial ways. Therefore, most of the collection wells is located in the low place or station for the efficient induction and collecting water. Manhole overtopping is occurring frequently because groundwater is concentrated in the drain pipe near the collecting well and heavy rainfall in summer. As a result, ballast contamination and radon levels are increased in tunnel. This paper introduces a solution is increasing overflow in tunnel, which introduces drainage system of non-motorized that uses differencial head between collecting well and manhole.