Core Viewpoint - The successful completion of the 1st mountain tunnel of the Guozi Valley pipeline project marks a significant milestone in the West-to-East Gas Transmission project, showcasing advanced engineering capabilities and addressing complex geological challenges [1][3]. Group 1: Project Overview - The Guozi Valley pipeline project is a critical part of the West-to-East Gas Transmission project, featuring four long-distance mountain tunnels [3]. - The total length of the new pipeline is 32 kilometers, designed for dual-pipe installation, enhancing the overall safety of the West-to-East pipeline system [3]. - The project is expected to be fully operational by September 2027, with the existing West-to-East pipelines having already transported over 557 billion cubic meters of natural gas, benefiting 500 million people along the route [3]. Group 2: Engineering Challenges and Solutions - The project faces complex geological conditions, including dense joint zones, water surges, shallow burial, and significant deformation, with over 80% of the weak surrounding rock [7][9]. - To tackle these challenges, the construction team utilized the largest diameter and longest distance dual-shield hard rock tunneling machine in the oil and gas industry [7][9]. - The machine, measuring 193 meters in length, functions like a geological MRI, capable of detecting changes in the geological conditions up to 120 meters ahead, effectively preventing tunnel water inflow and collapse [9]. Group 3: Technological Innovations - The project employs advanced guiding systems to monitor the tunneling equipment's posture, ensuring precision control within 5 centimeters [11]. - A smart construction site center has been established to monitor tunneling parameters, life support system data, and safety and environmental information in real-time [13]. - The system has collected and analyzed over 900,000 data points, triggering more than 300 automatic warnings, with a correction rate exceeding 98% [14].