本报电(记者叶传增)记者从京昆高铁西昆公司获悉，渝昆高铁控制性工程——全长21.17公里的炳辉隧道 日前顺利贯通，这是渝昆高铁贯通的首座超20公里特长隧道，也是中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。 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，采用双洞单线设计。隧 道地处乌蒙山区，地质条件复杂，属一级高风险隧道。 随着该隧道的贯通，渝昆高铁云南境内隧道贯通已达85%，桥隧施工完成超95%。目前，渝昆高铁建设 进入冲刺阶段，路基、桥梁、隧道等站前主体工程已基本成型，站后"四电"及站房工程正在加速推进， 即将全面进入无砟轨道施工。 ...

渝昆高铁是我国"八纵八横"高铁网京昆通道的重要组成部分。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。 场内设置制梁台座10个，双层存梁台座53个，最大存梁能力116孔。主要承担1标、2标420孔箱梁预 制任务，其中1标制梁315孔，2标制梁105孔。 中铁四局项目部使用智慧梁场信息化管理系统，引进数智化平台系统、四轴卧式弯曲中心、纵向分 布钢筋免拆卸定位组件、箱梁自动打磨喷涂一体机等多种智能化新工艺和新设备，实现制梁重要工序机 械化、自动化和智能化，在满足工艺要求和建设标准的同时，显著提升生产效率。 施工过程中，中铁四局项目团队狠抓工期节点，不断细化落实施工组织设计，严把材料进场关、工 序过程关、安全文明施工关，通过各环节标准化作业，全面提升预制箱梁的实体质量；对施工现场实施 全员、全过程、全覆盖、全方位的安全穿透式管理，强化安全管理和隐患排查，降低作业风险，保证箱 梁预制安全稳步推进。同时，项目团队狠抓节点任务落实，严格落实领导包保制度，项目领导班子深入 现场，强化对生产进度、安全质量管理、标准化建设等工作的盯控，为圆满完成箱梁预制任 ...

Core Points - The last tunnel of the Yukun High-speed Railway's Sichuan-Yunnan section, the Junlian Tunnel, successfully broke through on August 15, marking the completion of all 28 tunnels in this section [1] - Once completed, the Yukun High-speed Railway will enable travel from Chengdu to Kunming in approximately 3 hours [1] Group 1 - The Junlian Tunnel is located between Yibin County in Sichuan and Yanjin County in Yunnan, featuring complex geological conditions and is a key project for the Yukun High-speed Railway [1] - The tunnel measures 7,888 meters in length with a maximum depth of 635 meters, and 84% of the surrounding rock is classified as level four and five, indicating significant construction challenges [1] - Advanced technologies such as geological radar scanning and advanced horizontal drilling were utilized to predict risks associated with karst water and gas distribution, leading to substantial cost savings in construction [1] Group 2 - The maximum monthly excavation rate for the Junlian Tunnel reached 140 meters, and the tunnel was completed ahead of schedule with a focus on safety [1] - Currently, the roadbed engineering for the Sichuan-Yunnan section is 99% complete, while bridge engineering is 92% complete, with electrical and station construction progressing rapidly [1]

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 Viewpoint - The successful completion of the Hanjiaping and Nijiacun tunnels marks a significant milestone in the construction of the Yukun High-speed Railway, indicating that the project is entering a critical phase towards timely operation [1] Group 1: Project Progress - The Hanjiaping tunnel is 10.6 kilometers long, while the Nijiacun tunnel is 10.3 kilometers long, both being single-tube double-track tunnels [1] - A total of 45 tunnels have been completed in the Yukun High-speed Railway within Yunnan, achieving over 80% completion in tunnel construction [1] Group 2: Construction Challenges - The construction faced complex geological conditions, including sudden mud and water inflow, soft rock deformation, and harmful gases, which posed high safety risks and significant construction difficulties [1] - Targeted measures were implemented by the builders to ensure construction safety and quality [1] Group 3: Current Status - The Yukun High-speed Railway in Yunnan has entered a sprint phase, with the main body of the roadbed, bridges, and tunnels nearly completed, while the "four electrics" and station building projects are accelerating [1]

Core Viewpoint - The successful completion of the Changshui Airport Tunnel marks a significant breakthrough in China's high-speed rail construction, particularly in complex geological and sensitive environmental conditions [1][2]. Group 1: Project Overview - The Yukun High-Speed Railway spans approximately 700 kilometers and is a crucial part of the "Eight Vertical and Eight Horizontal" high-speed rail network, significantly reducing travel time between Chongqing and Kunming upon completion [1]. - The railway's segment in Yunnan Province is 388.6 kilometers long and is the first high-speed railway in the province designed for a speed of 350 kilometers per hour, with a high bridge and tunnel ratio of 87.4% [1]. Group 2: Technical Challenges and Innovations - The Changshui Airport Tunnel, measuring 8,770 meters, passes under sensitive structures including the airport's operational area and existing railways, presenting unique geological challenges such as fractured rock and karst development [1][2]. - Traditional blasting methods were avoided to minimize impact on airport operations; instead, advanced cantilever tunneling machines were employed, making this the longest continuous section using this method in China at 4,145 meters [2]. Group 3: Project Progress - With the completion of the Changshui Airport Tunnel, 43 tunnels have been completed in the Yunnan section of the Yukun High-Speed Railway, achieving over 80% completion of the tunnel work [3]. - The project is now in the final stages, with the main structures of the roadbed, bridges, and tunnels nearly complete, while the subsequent electrical and station works are progressing rapidly [3].

Core Viewpoint - The successful completion of the Changshui Airport Tunnel marks a significant milestone for the Yukun High-Speed Railway, enhancing transportation efficiency between Chongqing and Kunming, and promoting regional economic development [1] Group 1: Project Details - The Changshui Airport Tunnel, constructed by China Railway Eighteenth Bureau and China Railway Second Academy, has a total length of 8,770 meters [1] - The tunnel passes under sensitive structures including the airport operational area, freight channels, and existing railways, presenting high environmental sensitivity and geological risks [1] - With the completion of the Changshui Airport Tunnel, 43 tunnels have been completed in Yunnan province, achieving an 80% tunnel completion rate for the Yukun High-Speed Railway [1] Group 2: Economic Impact - The Yukun High-Speed Railway spans approximately 700 kilometers, with 388.6 kilometers located within Yunnan province [1] - Once fully operational, the railway will significantly reduce travel time between Chongqing and Kunming, enhancing transportation convenience in the Southwest region and facilitating coordinated regional economic development [1]

Core Insights - The construction of the Yukun High-Speed Railway has achieved a significant breakthrough with the successful completion of the Baoyun Tunnel, which is the longest single-hole double-line tunnel in the project, measuring 16.8 kilometers [1][2] Group 1: Project Details - The Baoyun Tunnel is located in Huize County, Qujing City, Yunnan Province, with a maximum depth of 386 meters, making it a critical control project for the Yukun High-Speed Railway [2] - The tunnel's construction faced complex geological conditions, including soft rock deformation, water-rich fault zones, and sudden changes in rock types, necessitating advanced construction techniques [2] - The Yukun High-Speed Railway spans approximately 700 kilometers, with 388.6 kilometers located within Yunnan Province, and is designed for a maximum speed of 350 kilometers per hour [2] Group 2: Construction Progress - With the completion of the Baoyun Tunnel, 41 tunnels have been completed in the Yukun High-Speed Railway within Yunnan, achieving a 75% completion rate for tunnel construction [2] - The project is currently in a critical phase, with over 14,000 construction workers and more than 1,500 large machinery units deployed daily to expedite the construction of key projects [2] - The completion of the railway is expected to significantly reduce travel time between Chongqing and Kunming, enhancing transportation convenience in the southwestern region and promoting high-quality regional economic development [2]

Core Viewpoint - The completion of the Ningjingli Tunnel marks a significant milestone in the construction of the Yukun High-Speed Railway, with 40 tunnels now completed in the Yunnan section, representing 75% of the total tunnel work [1][2]. Group 1: Project Progress - The Ningjingli Tunnel, measuring 6,327 meters, is a critical and challenging project located in Huize County, Qujing City, Yunnan Province [1]. - Since the start of construction in September 2021, the tunnel has faced significant challenges, including a maximum daily water inflow exceeding 40,000 cubic meters, equivalent to filling over 20 international standard swimming pools in a single day [2]. - With the completion of the Ningjingli Tunnel, over 90% of the bridge and tunnel construction for the Yunnan section of the Yukun High-Speed Railway is finished, and 97% of the earthworks for the roadbed have been completed [2]. Group 2: Strategic Importance - The Yukun High-Speed Railway is a vital part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, with a total length of approximately 700 kilometers, of which the Yunnan section is 388.6 kilometers long [2]. - Once operational, the railway will significantly reduce travel time between Chongqing and Kunming, enhancing transportation convenience in the southwestern region of China [2].

Core Viewpoint - The construction of the Yukun High-speed Railway is progressing steadily, with significant completion rates in various segments of the project [2][4][6][8][10][12] Group 1: Project Overview - The Yukun High-speed Railway is a crucial part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, specifically the Beijing-Kunming corridor [2][4][6][8][10][12] - The total length of the railway is approximately 700 kilometers, with a designed speed of 350 kilometers per hour [2][4][6][8][10][12] Group 2: Construction Progress - As of now, the earthwork for the foundation in the Yunnan section of the Yukun High-speed Railway has been completed by 97% [2][4][6][8][10][12] - The construction of bridges and tunnels has surpassed 90% completion [2][4][6][8][10][12]