广东阳信高速公路建成通车 粤西直通大湾区再添“动脉”

Core Viewpoint - The completion and opening of the Yangxin Expressway, constructed and operated by China Railway, marks a significant development in connecting the western Guangdong region with the Guangdong-Hong Kong-Macao Greater Bay Area, enhancing regional coordination and economic growth [1]. Group 1: Project Overview - The Yangxin Expressway spans approximately 141.9 kilometers, featuring a dual six-lane design with a maximum speed of 120 km/h, linking Yangchun City in Guangdong to the border with Guangxi [1]. - The project includes 28.487 kilometers of the main line constructed by China Railway Guangzhou Engineering Group, comprising 47 roadbed sections, 41 bridges, 5 tunnels, 3 interchanges, and 1 service area, with a bridge-tunnel ratio of 64% [1]. Group 2: Construction Challenges and Innovations - The construction faced significant challenges due to the need to traverse ecologically sensitive areas, including the Feisai Ridge Nature Reserve and the Gaozhou Reservoir water source protection area, necessitating high environmental protection standards [1]. - Advanced techniques such as the "Three Color Management Method" and the "Eternal Combination" construction model were employed to balance engineering progress with ecological preservation, successfully protecting over 200 acres of farmland and upgrading 16.7 kilometers of rural roads [1]. Group 3: Key Engineering Achievements - The longest tunnel, Fei'an Tunnel, measures 3,220 meters and overcame complex geological conditions, achieving double-line completion 82 days ahead of schedule after 19 months of construction [3]. - The Baotangling Tunnel, the most challenging segment, spans 2,782 meters with a maximum depth of 233 meters, utilizing advanced geological forecasting and drilling techniques to improve monthly excavation rates from under 10 meters to 50 meters, completing ahead of schedule [5]. Group 4: Strategic Importance - The Yangxin Expressway is a crucial part of Guangdong's highway network, enhancing connectivity between the Beibu Gulf Economic Zone and the Guangdong-Hong Kong-Macao Greater Bay Area, thereby promoting economic and social development in the surrounding cities [1]. - The expressway's opening is expected to significantly contribute to rural revitalization, regional coordinated development, and the construction of a strong transportation network in China [1].