突破千米大关！深汕铁路“坪山东4号”有里程碑式进展

Core Viewpoint - The completion of the 500 rings by the "Pingzhong East No. 4" shield machine marks a significant milestone in the construction of the Pingzhong East Tunnel, which is crucial for connecting Shenzhen and Huizhou, and demonstrates the effectiveness of the project's safety management system [1][2]. Group 1: Project Overview - The Pingzhong East Tunnel has a total length of 27.885 kilometers, designed for a speed of 350 kilometers per hour, and features a single-tube double-track structure [1]. - The tunnel's construction involves a challenging 5.38-kilometer section using a 14.34-meter diameter shield machine, which operates under complex geological conditions adjacent to the existing Xiamen-Shenzhen high-speed railway [1]. Group 2: Safety and Risk Management - The project team adheres to a "zero tolerance for safety" principle, establishing a multi-dimensional protection system that includes high-precision geological models and real-time monitoring of key parameters [2]. - An automated settlement monitoring system is in place, with four monitoring points set up for each bridge pier, creating a comprehensive "neural perception network" to ensure precise settlement control [2]. Group 3: Strategic Importance - The Shenshan High-Speed Railway is a vital part of the national "eight vertical and eight horizontal" high-speed rail network and plays a key role in enhancing connectivity between the Guangdong-Hong Kong-Macao Greater Bay Area and other economic regions [3]. - The completion of the project will facilitate frequent and convenient connections between Shenzhen and the Shenshan Special Cooperation Zone, promoting integration and development within the Greater Bay Area [3].