昌九高铁南昌扬子洲赣江公铁大桥主桥顺利合龙

Core Points - The completion of the last concrete pouring for the Chang-Jiu High-Speed Railway's Ganjiang Public-Rail Bridge marks the successful closure of all three main bridges across the Ganjiang River, laying a solid foundation for the entire bridge's connectivity [1][3] Group 1: Bridge Specifications and Achievements - The Ganjiang South Main Bridge is a concrete single-tower cable-stayed bridge, measuring 510 meters in total length with a main span of 240 meters and a tower height of 108 meters, currently the world's largest single-tower concrete cable-stayed bridge designed for a speed of 350 km/h [3] - The Chang-Jiu High-Speed Railway Ganjiang Public-Rail Bridge is a large-scale project integrating 14 channels, including high-speed rail and urban expressways, with a total length of 19 kilometers, crossing three tributaries of the Ganjiang River [3] - The project has set multiple world records, with the middle and west main bridges having completed closure in January and May of this year, respectively [3] Group 2: Economic and Infrastructure Impact - The completion of the bridge is expected to alleviate urban traffic congestion and reshape the regional economic landscape [3] - The Chang-Jiu High-Speed Railway is a key component of the national "Eight Vertical and Eight Horizontal" high-speed rail network, connecting Nanchang and Jiujiang in Jiangxi Province, with a total length of 138 kilometers and a design speed of 350 km/h [7] - Upon completion, the railway will enhance the connectivity of urban clusters in the middle reaches of the Yangtze River, the Poyang Lake area, and surrounding cities in the Yangtze River Delta and Guangdong-Hong Kong-Macau regions, significantly contributing to the development of the Yangtze Economic Belt and improving transportation infrastructure in Jiangxi Province [7]