“八纵八横”高铁网扩容——广湛高铁、汕汕高铁全线通车运营

Core Viewpoint - The opening of the Guangzhou-Zhanjiang High-Speed Railway (GZHSR) and the Shantou-Shantou South High-Speed Railway (SSHSSR) marks a significant expansion of China's "Eight Vertical and Eight Horizontal" high-speed rail network, enhancing connectivity in Guangdong province and promoting regional development [1][3][4] Group 1: Guangzhou-Zhanjiang High-Speed Railway (GZHSR) - GZHSR officially commenced operations on the 22nd, with travel time from Guangzhou Baiyun Station to Zhanjiang North Station reduced to approximately 1 hour and 32 minutes [1] - The project features the longest single-bore underwater tunnel in China, measuring 9,640 meters, which was completed in 33 months while maintaining millimeter-level ground settlement control [1] - GZHSR is a crucial part of the national high-speed rail network, covering a total length of 401 kilometers and including nine new stations [1][3] Group 2: Shantou-Shantou South High-Speed Railway (SSHSSR) - SSHSSR also commenced operations on the same day, achieving full line connectivity and featuring the world's first 350 km/h single-bore double-track underwater tunnel, measuring 9,781 meters [3][4] - The tunnel crosses complex geological conditions, including high seismic zones and multiple fault lines, showcasing significant engineering challenges [3][4] - The opening of SSHSSR allows for travel from Guangzhou to Shantou in as little as 1 hour and 50 minutes, marking a historic breakthrough in operational coverage [3][4]