住宅密集地における営業線直下を横断するEV通路の築造: 東京メトロ丸ノ内線　中野新橋駅

摘要

丸ノ内線は1962年3月の全線開業から約50年が経過した現在，1日平均輸送人員は100万人を超え，首都東京を支える重要鉄道路線となっている.池袋～荻窪間を結ぶ本線と中野坂上～方南町間を結ぶ分岐線からなり，総営業キロは27.4kmにわたる.そのうち分岐線については，3.2kmの延長があり，閑静な住宅街および道路下を通っている(図-1).%The Tokyo Metro Marunouchi Line consists of the main line linking Ikebukuro and Ogikubo and the branch line linking Nakano-Sakaue and Honan-cho. Over 50 years has passed since all the lines opened in March, 1962. This line is currently a major railway line supporting the capital, Tokyo by carrying more than a million passengers a day on average.rnTokyo Metro is currently pushing ahead with the installation of facilities for accessibility such as elevators and escalators based on regulations related to accessibility. Installation works of an underground connecting passage for accessibility were planned at Nakano-Shinbashi Station of the Marunouchi Line. The station is located in a densely populated area and the path was designed to cross directly underneath the subway line in operation.rnThis report gives information on an example of underpinning subway tunnel structures and cut-and-cover works adjoining existing structure under a narrow road at crowded area while taking into consideration of the effects on existing structures.