西气东输重要工程首条山岭隧道贯通

Core Viewpoint - The successful completion of the first mountain tunnel of the Guozi Pass pipeline marks a significant breakthrough for the West-to-East Gas Transmission project, enhancing the overall safety and risk resilience of the pipeline system [1][2]. Group 1: Project Overview - The Guozi Pass pipeline is a key energy infrastructure project located in the Ili Kazakh Autonomous Prefecture of Xinjiang, with a designed annual gas transmission capacity of 60 billion cubic meters [1]. - The new pipeline spans 32 kilometers and utilizes a dual-pipe system, which will operate in conjunction with existing pipelines to improve overall safety [2]. Group 2: Engineering Achievements - The project features four long-distance mountain tunnels, setting multiple industry records, including the longest single excavation length of 6,612 meters and the largest cross-section size of 6,870 millimeters [2]. - It is the highest tunnel project at an elevation of 2,005 meters and has the largest elevation difference of 324 meters, as well as the steepest slope of 10.61% [2]. Group 3: Environmental Considerations - The Guozi Pass area has a forest coverage rate of 53% and is home to 146 species of terrestrial vertebrates, serving as an ecological corridor [3]. - The company has implemented measures to minimize environmental impact, including optimized route design and innovative technology applications, as well as a tunnel drainage treatment system and comprehensive dust control measures [3].