跨京杭运河斜拉桥顺利合龙

Group 1 - The Tongtaiyang Grand Bridge, part of the Shanghai-Chongqing-Chengdu high-speed railway, has successfully completed the key construction milestone of the cross-Jinghang Canal cable-stayed bridge, laying a crucial foundation for the railway's timely operation [3] - The Tongtaiyang Grand Bridge spans approximately 172.9 kilometers, making it the longest high-speed railway bridge under construction in the world, connecting the cities of Nantong, Taizhou, and Yangzhou in Jiangsu province [3] - The Shanghai-Chongqing-Chengdu high-speed railway is a significant component of the national "Eight Vertical and Eight Horizontal" high-speed rail network, with a total length of about 2100 kilometers and a design speed of 350 kilometers per hour, linking six provinces and municipalities [3] Group 2 - The completion of the bridge will enhance the integration of rail and water transport along the Yangtze River, optimizing the comprehensive transportation system in the region and contributing to the development of the "Railway on the Yangtze River Delta" [3] - The project involves overcoming significant construction challenges, having crossed existing railways, highways, and waterways 116 times [3] - The bridge is noted for having the largest span, the tallest main tower, and the most complex technology among the key control nodes of the entire railway line [3]