上海嘉闵线盾构掘进突破千环

Core Viewpoint - The Shanghai Metro Jia Min Line, constructed by China Railway 16th Bureau, has made significant progress with the successful breakthrough of the right-line shield machine "Ding An No. 2" at the section between Chengbei Road Station and Xincheng Road Station, reaching over 1000 rings [1] Group 1: Project Progress - The section is approximately 2.55 kilometers long, primarily consisting of weak geological layers, and requires crossing numerous underground pipelines, bridges, and buildings [1] - The project team has enhanced construction efficiency and quality by installing a soil weighing and posture automatic correction system, utilizing digital methods for dynamic parameter control [1] - An innovative "three-step cleaning method" has been adopted to address water accumulation at the shield tail, along with the establishment of a special responsibility system [1] Group 2: Safety and Communication - A comprehensive three-network integration communication system has been deployed within the tunnel to achieve seamless signal coverage, enabling rapid location and response to emergencies, thereby improving emergency communication capabilities and safety management efficiency [1] Group 3: Project Significance - The Jia Min Line spans 44.04 kilometers and serves as a major north-south trunk line in Shanghai, connecting Jiading New Town, Hongqiao Hub, and Minhang [1] - Upon completion, the line will alleviate traffic pressure on the Hongqiao Hub and contribute to the construction of the Yangtze River Delta rail transit network [1]