潍宿高铁至青岛连接线 桃园隧道顺利贯通

Core Insights - The successful completion of the Taoyuan Tunnel marks a significant milestone in the construction of the Weishui High-Speed Railway to Qingdao connection line, which is crucial for the project's progress [1][2] - The tunnel, measuring 940 meters in length, faces complex geological challenges, including high-pressure environments and proximity to existing infrastructure, necessitating advanced construction techniques [1][2] Group 1: Project Overview - The Weishui High-Speed Railway to Qingdao connection line spans 108.78 kilometers with a designed speed of 350 km/h, serving as an important link in China's high-speed rail network [2] - The project is part of the national "Eight Vertical and Eight Horizontal" high-speed rail framework and is essential for enhancing connectivity between the Jiaodong Peninsula and major economic regions [2] Group 2: Construction Techniques and Achievements - The construction team implemented a "dual-direction tunneling" approach, reducing the planned construction period from 14 months to 11 months, achieving over a 20% increase in efficiency [2] - Strict adherence to a comprehensive construction guideline ensured that ground subsidence was controlled to within 3 millimeters, significantly below regulatory limits, thereby ensuring safety during the tunneling process [2]