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 will enable high-speed trains to cross the Yangtze River at speeds of 350 km/h without reduction, marking a significant advancement in China's high-speed rail infrastructure [1][2]. Group 1: Bridge Construction - The Chongqi Railway and Highway Yangtze River Bridge features a main span of 400 meters, ranking first in the world among similar bridges under construction [2]. - 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 [2]. - The construction team has overcome significant challenges related to bridge deformation caused by wind and train forces, ensuring the stability of high-speed rail tracks [2][3]. 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 [4][5]. - The tunnel construction involves advanced technology, including a shield machine equipped with an intelligent system for autonomous operation, ensuring precision and safety under high water pressure [5][6]. - Innovative materials and structural designs have been implemented to enhance the tunnel's stability and waterproofing, allowing for safe high-speed rail operation [5][6].