四川九寨沟至绵阳高速全线建成通车
Zhong Guo Xin Wen Wang·2025-09-29 11:40

Core Viewpoint - The G8513 Jiuzhaigou to Mianyang Expressway (referred to as "Jiuzhai Expressway") has officially opened, marking the end of the historical lack of expressway access for Jiuzhaigou, Pingwu, and Beichuan counties in Sichuan [1][3]. Group 1: Infrastructure Details - The Jiuzhai Expressway spans a total length of 245.809 kilometers, featuring a dual four-lane highway standard with a design speed of 80 km/h [3]. - The expressway includes 131 bridges, 45 tunnels, 18 interchanges, 17 toll stations, and 6 service areas, with a bridge-tunnel ratio of 82.15%, indicating a high density of bridge and tunnel structures [3]. - The expressway was opened in segments, with the final segment connecting the Jiuzhaigou Chaimenguan to Jiamuhai section completed in 2023, achieving full connectivity [3]. Group 2: Connectivity and Ecological Considerations - The Jiuzhai Expressway connects with the G8513 Pingtian to Mianyang Expressway in the north and links to the G5 Jingkun Expressway and G93 Chengyu Ring Expressway in the south, forming a significant interprovincial highway corridor between Sichuan and Gansu [5]. - The expressway traverses sensitive ecological areas, including the Giant Panda National Park and the National Aquatic Germplasm Resource Conservation Area, with a high bridge-tunnel ratio of 95% in the panda park section, minimizing ecological impact [5]. - The expressway integrates over 30 cultural and tourism resources, enhancing the region's tourism potential through a design that reflects local cultural elements [5]. Group 3: Construction Challenges - Construction of the Jiuzhai Expressway began in 2016 and involved over 40,000 workers, facing significant geological challenges, including multiple fault zones and natural disasters such as the 8.0 magnitude Jiuzhaigou earthquake [7]. - The Baima Tunnel, noted for its high design and construction difficulty, passes through seven fault zones and has a maximum burial depth of 1,092 meters, highlighting the engineering challenges faced during construction [7].