建设过程中，中铁五局采用"2横洞+2斜井+1平导"施工方案和中间小导洞先行贯通措施，在施工高峰期，多达22个掌子面同步进行掘进 作业。针对工程地质难题，建设者构建起"注浆+管棚支护+智能排水"的立体防线，将风险降至可控范围，月进尺最高达到135米，成功实现 了单线隧道快速高效施工。 渝昆高铁全长约700公里，其中云南省境内长388.6公里，是云南省内首条设计时速350公里的高速铁路。渝昆高铁全线建成通车后，重 庆到昆明的行车时间将大幅压缩，极大地提升西南地区与全国的交通便利性，促进区域经济协同发展。（记者丁怡全） 炳辉隧道位于云南省昭通市彝良县境内，由中铁二院勘察设计、中铁五局承建，属一级高风险隧道，是渝昆高铁全线控制性工程。全 隧集低瓦斯、岩溶、软岩大变形等多种不良地质于一体，勘察设计和施工组织难度极大。 中铁二院渝昆高铁项目部副经理李济良说："我们通过超前地质预报与地质核查相结合，建立'事前预警、事中核查、事后确认'的工作 模式，为全隧安全贯通提供保障。" 记者从京昆高铁西昆公司获悉，8月19日，我国"八纵八横"高铁网京昆通道重要组成部分渝昆高铁建设取得重大突破，全长21.17公里的 炳辉隧道贯通，这是渝 ...

炳辉隧道位于云南省昭通市彝良县境内，采用双洞单线设计，地质条件复杂，属一级高风险隧道，是渝昆高铁全线控制性工 程。隧道建设期间，软岩大变形、涌水等多种复杂地质情况频繁发生，参建单位提出37项应急解决方案，有效提升了施工作业效 率。 央视网消息：8月19日，渝昆高铁控制性工程——全长21.17公里的炳辉隧道顺利贯通，这是渝昆高铁贯通的首座超20公里特长 隧道，也是我国西南地区首座贯通的20公里以上时速350公里的高速铁路特长隧道。 渝昆高铁作为我国"八纵八横"高铁网京昆通道的重要组成部分，全长约700公里，全线建成通车后，重庆到昆明的行车时间将 大幅压缩，极大地提升西南地区与全国的交通便利性，促进区域经济协同发展。 ...

Core Points - The Chongqing-Wanzhou High-Speed Railway (Yuwan High-Speed Railway) has successfully completed the construction of the Quxi River Double-Line Bridge, a significant milestone in the project [2][4][6] - The bridge, located in the Fuling District of Chongqing, spans approximately 953 meters and is considered a key challenging project along the railway line [8][10][12] - The Yuwan High-Speed Railway is part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, with a total length of 251 kilometers and a designed speed of 350 kilometers per hour [2][4][6]

Core Viewpoint - The successful completion of the Quxi River Double-Line Bridge marks a significant milestone for the Chongqing-Wanzhou High-Speed Railway, laying a solid foundation for the timely operation of the entire line [1][3] Group 1: Project Details - The Quxi River Double-Line Bridge spans approximately 953 meters and is considered a key challenging project along the railway [1] - The Chongqing-Wanzhou High-Speed Railway is part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, connecting major regions [1] - The railway line starts from Chongqing East Station and extends 251 kilometers to Wanzhou North Station, with a designed speed of 350 kilometers per hour [1] Group 2: Economic and Social Impact - The completion of the project will significantly enhance the connectivity between the urban clusters in the northeastern Sichuan Three Gorges Reservoir area and the main urban area of Chongqing [3] - It will greatly facilitate travel for local residents and promote economic and social development along the route [3] - The project is crucial for implementing the strategic development of the Chengdu-Chongqing economic circle and for the coordinated development of the "Belt and Road" initiative and the Yangtze River Economic Belt [3]

Core Points - The Yibin Junlian Tunnel, the last tunnel of the Chongqing-Kunming High-Speed Railway (Yukun High-Speed Railway) Sichuan-Yunnan section, has successfully been completed, marking a new phase in the project construction [1][3] - The tunnel is 7,888 meters long and is located in the transitional zone between the Sichuan Basin and the Yunnan-Guizhou Plateau, making it a key engineering project due to its complex geological conditions [3] - With the completion of this tunnel, all 28 tunnels in the Sichuan-Yunnan section of the Yukun High-Speed Railway have been connected, and the project is now moving into the ballastless track construction phase [3] Industry Impact - The Yukun High-Speed Railway is a crucial part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, connecting major regions and enhancing transportation efficiency [5] - The railway will span approximately 700 kilometers, starting from Chongqing West Station and ending at Kunming South Station, with a designed speed of 350 kilometers per hour [5] - Once completed in 2026, the travel time between Chongqing and Kunming will be significantly reduced, strengthening the economic ties between the Chengdu-Chongqing economic circle and the central Yunnan region [5]

Core Points - The new Chongqing to Wanzhou high-speed railway (referred to as "New Yuwan High-speed Railway") has successfully completed the main bridge's connection, laying a solid foundation for the timely operation of the entire line [1][2] - The New Yuwan High-speed Railway is part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, connecting key regions and enhancing transportation efficiency [2] Summary by Sections Project Overview - The New Yuwan High-speed Railway features a total length of 251 kilometers and a design speed of 350 kilometers per hour, starting from Chongqing East Station and connecting to Wanzhou North Station [2] - The newly constructed double-line bridge spans 1,848 meters and is located in the Fuling District of Chongqing, with a maximum pier height of 100 meters [2] Construction Techniques - The bridge construction utilized a method that involved breaking down 64-meter simple beams into 17 segments of approximately 4 meters each, employing a factory-prefabrication approach for enhanced safety and simplicity compared to traditional methods [2] Economic Impact - The completion of the New Yuwan High-speed Railway is expected to facilitate convenient connections between the northeastern Sichuan Three Gorges Reservoir area and the main urban area of Chongqing, significantly benefiting local residents and promoting economic and social development along the route [2]

Core Points - The completion of the last segment of the New Bridge Double-Line Super Bridge marks a significant milestone for the Chongqing-Wanzhou High-Speed Railway, ensuring the bridge's readiness for timely operation [1][3] - The bridge, designed by China Railway Erju and constructed by China Railway Construction Bridge Bureau, spans 1848 meters and features a maximum pier height of 100 meters [3] - The innovative structure of the 64-meter prefabricated segmental beam, consisting of 17 segments, simplifies construction and enhances safety and reliability compared to traditional methods [5] - The Chongqing-Wanzhou High-Speed Railway is part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, facilitating economic development and connectivity in the region [7]

Core Points - The successful completion of the Ruoergai Tunnel marks a significant milestone in the construction of the Xining to Chengdu Railway, which is part of China's "Eight Vertical and Eight Horizontal" high-speed rail network [1][2] - The Xining to Chengdu Railway spans approximately 170 kilometers in Sichuan, with most sections at an altitude of around 3,500 meters [1] - The Ruoergai Tunnel, a single-hole double-track tunnel, is 2,176.92 meters long and designed for a speed of 200 km/h, presenting complex geological conditions and high construction risks [1] Construction Progress - As of now, the tunnel engineering in the Sichuan section of the Xining to Chengdu Railway has reached 66.2% completion, with five tunnels already connected [2] - Bridge engineering is 77.5% complete, and roadbed engineering is at 58.8%, indicating that all construction activities are progressing in an orderly manner [2] Investment and Economic Impact - The construction of the Xining to Chengdu Railway in the Sichuan section involves investment from Shudao Investment Group, and the completed railway is expected to greatly facilitate travel for local residents and promote economic and social development along the route [2]

Core Viewpoint - The completion of the first "four electricity" engineering house for the Chengdu-Chongqing middle-line high-speed railway marks the beginning of a critical phase for the project, which is part of China's significant high-speed rail network [1] Group 1: Project Details - The Chengdu-Chongqing middle-line high-speed railway is an essential component of China's "eight vertical and eight horizontal" high-speed rail network, with a total length of 292 kilometers [1] - The railway is designed for a maximum speed of 350 kilometers per hour, connecting multiple locations in Chongqing and Sichuan [1] Group 2: Impact and Benefits - Once completed, the railway will link several high-speed rail lines, enhancing the transportation network in the Chengdu-Chongqing region and significantly reducing travel time between the two cities [1] - The project aims to facilitate travel for local residents along the route, improving accessibility and convenience [1]

Core Viewpoint - The construction of the Xiyu High-speed Railway, an important part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, has made significant progress with the successful completion of the Miaojialiang Tunnel, which is 1285 meters long, marking a key milestone for the project [1] Group 1 - The Xiyu High-speed Railway is a crucial component of the Jingkun and Baoyin-Hai corridors [1] - The construction team from China Railway 12th Bureau has worked for 683 days to achieve this breakthrough [1] - A total of 28 tunnels have been completed in the Kangyu section of the Xiyu High-speed Railway, laying a solid foundation for the timely operation of the entire line [1]