Core Viewpoint - The successful completion of the gas pipeline relocation project at Pingshan Station marks a significant milestone for the Shenzhen-Shantou Railway, facilitating the construction of the Pingshan Grand Bridge and ensuring the smooth progress of subsequent engineering tasks [1][2]. Group 1: Project Overview - The Shenzhen-Shantou Railway is a crucial transportation backbone in the eastern Guangdong-Hong Kong-Macao Greater Bay Area, with the "three electricity" and pipeline relocation project being referred to as the "pioneering project" for the entire line [1]. - The project involves the relocation and protection of oil and gas pipelines and water supply and drainage pipelines over a total length of approximately 54 kilometers, including 35 points for oil and gas pipeline relocation and 61 points for water supply and drainage pipeline relocation [1]. Group 2: Project Management and Execution - The project team from China Railway Construction Corporation implemented a scientific deployment and established an efficient collaboration mechanism with relevant departments, completing meticulous management from comprehensive surveys to plan optimization and approval procedures [2]. - The team adhered to the principle of "high standards and zero accidents," ensuring comprehensive control over safety and quality through strict technical exchanges and safety grid management [2]. - As of now, a total of 65 pipeline relocations have been completed, with the successful gas connection at Pingshan Station indicating the overcoming of the most challenging obstacles [2].

Group 1 - The successful completion of the first segment of the switch continuous beam marks a significant breakthrough in the key technical node of the "four lines to three lines" switch area of the project [1][3] - The pouring of the first segment took nearly 19 hours, with a total volume of 1,024 cubic meters [1] - The Shenshan Railway is a crucial part of the intercity railway network in the Guangdong-Hong Kong-Macao Greater Bay Area, significantly reducing the travel distance between Shenzhen and the Shenshan Special Cooperation Zone [1] Group 2 - The switch continuous beam spans 228.7 meters and is divided into six segments, with the D segment measuring 45.7 meters [3] - The beam structure is a single box three-chamber design, with a height of 3.035 meters and a width that varies from 23.65 meters to 19.955 meters [3] - The project team faced multiple technical challenges, including complex structural systems and high precision control requirements, and established a joint technical task force to address these challenges [3]

Group 1 - The "Pingzhang East No. 3" shield machine, constructed by China Railway Third Bureau, successfully commenced operation on August 1 in Shenzhen Pingshan [2] - The shield machine has a diameter of 14.34 meters, a tunneling length of 3,850.6 meters, and a maximum burial depth of 62.5 meters, designed for a single-tube double-track tunnel [2] - The Shenzhen-Dongguan Railway, starting from Shenzhen Xili Station to the Shenzhen-Dongguan Special Cooperation Zone and connecting to the Guangshan Railway at Shenzhen-Dongguan Station, has a total length of 125.5 kilometers and is a key part of the national "Eight Vertical and Eight Horizontal" high-speed rail network coastal corridor [2]