【大ピンチ】都心の鉄道に迫る危機 ダイヤ改正で露呈した大ピンチ 計画段階の意外な姿とは｜JR総武快速線・横須賀線地下区間【小春六花】

●Chapters 0:00 Opening 0:21 Tokyo Station (Sobu Rapid Line/Yokosuka Line) 3:06 History of Construction of the Tokyo Underground Line 6:32 Proposal (Operational Mode/Tokyo Station Structure) 9:21 Intermediate Stations on the Sobu Rapid Line 11:53 Intermediate Stations on the Yokosuka Line 15:22 Tunnel Maintenance Issues ●Synopsis The JR Sobu Rapid Line and Yokosuka Line are approaching their 50th anniversary since their opening. The latest timetable revision announced a reduction in the first and last trains on this major railway line, exposing a major infrastructure maintenance crisis. This video delves into the railway crisis that has only become apparent after 50 years, from the story behind the creation of Tokyo Station's underground platforms to the unexpected platform structure considered during the planning stage and the serious groundwater issues posed by the shield tunnel. This video provides a thorough explanation of the underground battles hidden from passengers, including the current state of urban infrastructure maintenance, water leaks, subsidence, and measures to prevent platform rise! ●What you'll learn from this video The background to the construction of the Tokyo Station underground platforms for the Sobu Rapid Line and Yokosuka Line, and their relationship to the Five-Prong Commuter Strategy Surprising plans that were not adopted during the design of the Tokyo Station underground platforms, including a three-platform, six-track structure The benefits of the shield tunneling method used at Shin-Nihonbashi, Bakuro-cho, and Shimbashi stations, and the characteristics of each station The serious issues facing the tunnel facilities between Tokyo and Shinagawa, where the Yokosuka Line's first and last trains have been shortened due to a timetable revision The impact of rising groundwater levels due to groundwater restrictions on underground tunnels and station structures The risk of underground station structures floating up due to the buoyancy of groundwater, as seen in the case of Shin-Kodaira Station The installation of 200kg steel anchors to prevent floating on the Tokyo Station underground platforms The history of the blue water pipes installed alongside the Sobu Rapid Line tracks to prevent groundwater leaks ●About this channel This channel provides detailed explanations of the appeal of railway lines, stations, and trains. This program provides easy-to-understand information, featuring on-site footage, diagrams, aerial photographs, and management data. It focuses on railways in the Tokyo metropolitan area, but also covers lines and stations throughout Japan. ●Narration Koharu Rikka #SobuRapidLine #YokosukaLine #TokyoStation