the control project of the Chengdu Chongqing High speed Railway, the Zongshupo Tunnel, constructed by China Railway 21st Bureau, was successfully completed. This 1088 meter long single hole double track tunnel has a maximum excavation area of 184 square meters, setting a record for the entire section and marking a significant milestone in the project construction.

Faced with the complex geology and strict environmental requirements in the hilly area of central Sichuan, the project team innovatively adopted early high-strength shotcrete and low prestress hollow anchor technology, equipped with advanced equipment such as cantilever tunneling machines and intelligent arch anchor trolleys, forming a mechanized assembly line of "one bridge, four machines, and six trolleys" to achieve safe and efficient construction of super large section tunnels. The tunnel construction has also undertaken multiple high-speed rail research projects.

As a key node of the "Eight Verticals and Eight Horizontals" high-speed railway network along the Yangtze River, the Chengdu Chongqing Middle Line high-speed railway will become the smoothest and most direct expressway connecting Chengdu and Chongqing after its completion. The project leader stated that this connectivity will lay a solid foundation for the completion of the entire line by 2025 and will effectively promote the construction of the Chengdu Chongqing dual city economic circle. (This article is from the official website of Jian Dao www.seetao.com. Reproduction without permission is prohibited, otherwise it will be prosecuted. Please indicate Jian Dao website+original link when reprinting.) Jian Dao website strategy column editor/Wu Juan