新春走基层 | 一桥一隧筑通途 高铁过江不减速

Core Viewpoint - The construction of the Chongqi Railway and Highway Yangtze River Bridge and the Chongtai Yangtze River Tunnel is set to revolutionize high-speed rail travel in China, allowing trains to cross the Yangtze River at speeds of 350 km/h without slowing down, marking a significant advancement in infrastructure development [2][3][6]. Group 1: Bridge Construction - The Chongqi Railway and Highway Yangtze River Bridge features a main span of 400 meters, making it the longest of its kind under construction globally [3]. - The bridge employs a dual-layer design, accommodating a six-lane highway on the upper level and high-speed rail on the lower level, creating a three-dimensional transportation system [3][4]. - Engineers have overcome significant challenges related to bridge deformation caused by wind and train movement, ensuring the stability required for high-speed rail [3][4]. Group 2: Tunnel Construction - The Chongtai Yangtze River Tunnel is the largest high-speed rail underwater tunnel in China, with a total length exceeding 14 kilometers and a single-shield tunneling distance of 11.3255 kilometers, the longest in the world [5][6]. - The tunnel construction utilizes advanced technology, including a shield machine equipped with an intelligent system for autonomous operation, ensuring precision and safety under challenging conditions [6][7]. - Innovative materials and structural designs have been implemented to enhance the tunnel's stability and waterproofing, allowing it to withstand high water pressure and complex geological conditions [6][7].