江西瑞金机场首航、贵州花江峡谷大桥通车、四川夹金山隧道开通——连日来，赣黔川革命老区 三个标志性工程相继建成投用，不仅为地区交通、物流畅通提供了坚实支撑，也成为当地文旅火 热的"流量担当"。 革命老区是党和人民军队的根，是中国人民选择中国共产党的历史见证。习近平总书记指出："吃 水不忘掘井人。我们绝不能忘记革命先烈，绝不能忘记老区人民，要把革命老区建设得更好，让 老区人民过上更好生活。" 今年是中央红军长征出发91周年。江西瑞金、贵州北盘江、四川夹金山，这三个红军长征的重要 地理坐标，见证曾经艰险的长征路逐渐变为通途。 党的十八大以来，以习近平同志为核心的党中央在革命老区部署实施了一系列支持措施和重大项 目，支持革命老区振兴发展。沿着草鞋踩出的"红飘带"，一座座现代化交通工程拔地而起，一张 综合立体交通网络加速成型，助力老区经济社会发展按下"加速键"，吸引更多的人流、物流、资 金流，绘就新时代革命老区振兴新图景。 交通蝶变 长征沿线老区不再山高路远 刚刚过去的国庆中秋假期，赣州瑞金机场航站楼内客流涌动，"红都瑞金欢迎你"打卡处排起长 队。 9月28日，瑞金机场正式通航，飞机的轰鸣声划过红都山峦。"跟着课本去旅 ...

Core Viewpoint - The completion of the Qiaojin Mountain Tunnel, the longest secondary highway tunnel in China, significantly reduces travel time across the mountain and addresses transportation challenges for 110,000 residents during winter snow closures [3][4]. Group 1: Project Overview - The Qiaojin Mountain Tunnel spans 10.07 kilometers, with the main tunnel measuring 9.35 kilometers and a parallel tunnel of 9.36 kilometers [6]. - The project was initiated on December 26, 2021, with a total investment exceeding 1.8 billion yuan [6]. - The tunnel is designed to accommodate a speed of 60 kilometers per hour, adhering to secondary highway technical standards [6]. Group 2: Environmental Considerations - The tunnel's construction was mindful of the ecological impact, particularly as it is located within a giant panda national park [4]. - To minimize ecological disruption, the design of the ventilation and smoke exhaust system was modified from conventional shafts to parallel tunnels [4]. Group 3: Construction Achievements - The project utilized a Tunnel Boring Machine (TBM) for the first time in the construction of a national highway, achieving remarkable progress rates: 50 meters per day, 736 meters per month, and 1,000 meters over 40 consecutive days [4]. - The TBM used for the Qiaojin Mountain Tunnel was repurposed from a previous project, significantly reducing costs [4]. Group 4: Historical Significance - The tunnel is located at an average altitude of 3,000 meters and serves as a critical route for emergency rescue operations during natural disasters, such as the Wenchuan and Lushan earthquakes [4]. - The historical context of the area is highlighted by its association with the Long March, where key leaders of the Red Army traversed the mountain [3].