南宁轨道交通6号线同定区间实现双线贯通

Group 1 - The core point of the article is that the Nanning Rail Transit Line 6 has successfully achieved double-line tunneling in the section from Tongle Station to Dingqiupo Station, marking it as the first double-line section to be completed on the entire line [1] - The total length of the double-line tunnel in the Tongding section is approximately 1,883 meters, which includes crossing through 280 meters of full-section gravel layer and 230 meters of full-section fine sand layer [1] - The construction faced challenges such as high groundwater levels and strong permeability, which posed risks of surging, flowing sand, surface subsidence, and even collapse during the tunneling process [1] Group 2 - To ensure safety and quality during construction, participating units implemented three major measures: enhancing shield machine equipment modifications, establishing an intelligent monitoring platform, and introducing "four new" technologies [1] - The shield machine was equipped with a "four small components" system to strengthen risk management during tunneling, and a smart construction digital platform was created to enable real-time data upload and timely risk management [1] - The combination of "manual + intelligent" dual control has led to a safe and smooth construction process in the Tongding section, with excellent quality in the assembly of the formed segments [1]