环北广西工程加快攻坚六万大山最长隧洞

Group 1 - The "Huanbei Guangxi Project" has achieved a significant milestone with the successful launch of the "Huanbei Guangxi No. 7 TBM" in the Liuwanda Mountain tunnel, with two other TBMs expected to start by August, enhancing project efficiency [1] - The Liuwanda Mountain tunnel, which is 25 kilometers long and has complex geological conditions, will see the TBM undertake 11.427 kilometers of tunneling, advancing over 500 meters per month [1] - The project is a key component of the national water network and aims to improve water supply security for major cities in Guangxi, benefiting nearly 14 million people upon completion [1] Group 2 - The Huanbei Guangxi Project is equipped with a total of 7 TBMs, with 3 expected to start this year, creating a multi-point construction strategy that significantly enhances excavation efficiency [2] - The simultaneous operation of the 3 TBMs establishes a solid foundation for subsequent tunneling work [2]