中新网昭通9月30日电 (胡国英 韩胜 张琛魁)9月30日，由中国铁建大桥局承建的渝昆高铁重难点控制性 工程三股水特大桥合龙。 渝昆高铁三股水特大桥合龙。张琛魁 摄 中国铁建大桥局渝昆高铁项目部现场负责人高子行介绍，在基础施工环节，针对陡峭地形，他们采用精 准的测量定位和特殊的钻孔桩施工技术，让桥墩基础在复杂的地质条件下也能保持稳固。在高墩施工方 面，运用液压爬模技术，实现了高效、安全的高空作业，有效保证了墩身施工质量和进度。在混凝土浇 筑方面，采用了智能化温控系统，确保了大体积混凝土的施工质量。 9月30日， 随着三股水特大桥合龙，渝昆高铁桥梁施工完成97%。渝昆高铁全长约700公里，其中云南段长388.6公 里，设计时速350公里，是云南省内首条时速达350公里的高速铁路，全线建成通车后，重庆到昆明的行 车时间将大幅压缩，对构建新发展格局、促进沿线地区经济社会高质量发展具有重要意义。(完) 三股水特大桥位于云南省昭通市盐津县境内，由中铁二院勘察设计，为主跨168米、全长546米大跨度高 墩桥梁。桥梁跨越高山峡谷区，两侧陡立，断面呈"V"字形，地形地质条件极为复杂，施工难度极大， 是渝昆高铁全线重难点控制性 ...

中新网昭通9月17日电 (王华 韩胜 徐宏鹏)由中国铁建大桥局承建的渝昆高铁盐津南站白水江四线特大桥 17日合龙。 图为渝昆 高铁盐津南站白水江四线特大桥合龙。徐宏鹏 摄 盐津南站白水江四线特大桥是渝昆高铁"出川入滇"第一站盐津南站的站台桥，全长787米，最大墩高82 米，主跨152米，桥面距离水面80米，相当于26层楼的高度，水上和高空作业安全风险高、施工难度 大。 渝昆高铁全长约700公里，其中云南段长388.6公里，设计时速350公里，是云南省内首条时速达350公里 的高速铁路，全线建成通车后，重庆到昆明的行车时间将大幅压缩。(完) 渝昆高铁中国铁建大桥局现场负责人郭万辉介绍，桥梁所在地区地形复杂，采用高铁站台和桥梁一体设 计，既有效解决了高铁车站的选址难题，又最大程度减少对了生态环境的影响。 ...

资讯编辑：罗莹 021-26093550 资讯监督：乐卫扬 021-26093827 资讯投诉：陈跃进 021-26093100 9月4日，在西延高铁宜君站至黄陵站区间，随着恒张力放线车完成最后一个锚段接触网导线架设任务， 标志着由西成客专陕西公司建设、中铁电气化局承建的西延高铁全线接触网实现贯通，为后续全线送电 及联调联试奠定了坚实基础。 西安至延安高速铁路是陕北革命老区的首条高铁，是国家高速铁路网包(银)海高速铁路通道的重要组成 部分，与正在建设的西渝高铁共同形成南北大通道，是陕西省"米"字型高铁网主骨架的重要构成， 是"十四五"时期的重点建设项目。线路全长299.8公里，建设标准为双线高速铁路，设计速度350公里/小 时。线路建成投入运营后，西安至延安的运行时间将从目前的2个半小时缩短至1小时左右，对提升陕西 省区位优势和全国铁路网枢纽地位，进一步完善优化国家高速铁路网络布局，服务革命老区乡村振兴具 有重要意义。 ...

Group 1 - The Guangzhan High-speed Railway's joint debugging and testing work officially started on August 28, with the first test train running from Xinxing South Station to Zhanjiang North Station [1] - The Guangzhan High-speed Railway is a crucial part of China's "eight vertical and eight horizontal" high-speed rail network, with a total length of 401 kilometers and a designed speed of 350 kilometers per hour [1][2] - The railway will significantly shorten the travel time between the western Guangdong region and the Guangdong-Hong Kong-Macao Greater Bay Area, enhancing transportation capacity and improving travel conditions for local residents [2] Group 2 - The construction of the Guangzhan High-speed Railway faces significant challenges due to complex terrain and geological conditions, with a bridge-tunnel ratio of 76.8% [1] - The project includes 190 bridges and 50 tunnels, with key engineering challenges such as the Zhanjiang Bay underwater tunnel and the Foshan Grand Bridge [1] - The collaboration between China Railway Guangzhou Bureau Group and Guangdong Railway Construction Investment Group has been crucial in ensuring quality and progress in construction [1]

Core Points - The completion of the Binhui Tunnel, measuring 21.17 kilometers, marks a significant milestone for the Yukun High-Speed Railway, being the first tunnel over 20 kilometers in length in Southwest China [1][3] - 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 [6] Summary by Sections - **Tunnel Completion**: The Binhui Tunnel, located in Yiliang County, Zhaotong City, Yunnan Province, is a dual-tube single-line design and is classified as a high-risk tunnel due to its complex geological conditions [3] - **Construction Progress**: With the completion of the first tunnel over 20 kilometers, the overall tunnel completion rate in Yunnan Province for the Yukun High-Speed Railway has reached 85%, and over 95% of bridge and tunnel construction is completed [4] - **Future Impact**: Once operational, the Yukun High-Speed Railway will significantly reduce travel time between Chongqing and Kunming [6]

Group 1 - The Baoyin High-speed Railway's Baohui section has entered a critical phase of engineering acceptance with the launch of joint debugging and testing [1][2] - The line will utilize various testing equipment to conduct comprehensive tests on high-speed rail systems, ensuring operational readiness [1] - The Baoyin High-speed Railway is a key part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, significantly improving connectivity in the northwest region [2] Group 2 - The total length of the Baoyin High-speed Railway's Baohui section is approximately 420 kilometers, with a design speed of 250 kilometers per hour [2] - The railway will reduce travel time from Baotou to Yinchuan from 6 hours to under 3 hours, enhancing the efficiency of transportation in the region [2] - The completion of the Baoyin High-speed Railway will facilitate rapid passenger travel and strengthen economic ties between northwest and north China, promoting high-quality socio-economic development [2]

Core Viewpoint - The successful completion of the Hujia Yuan Tunnel marks the full breakthrough of all 42 tunnels of the Xishi High-speed Railway, laying the foundation for the comprehensive construction of ballastless tracks and the operation of the line [1][2] Group 1: Project Overview - The Xishi High-speed Railway has a total length of 255.7 kilometers, with the Shaanxi section measuring 169.4 kilometers and the Hubei section measuring 86.3 kilometers [1] - The Hubei section includes 26.5 tunnels, with a total length of 77 kilometers, accounting for 89% of the section [1] Group 2: Tunnel Details - The Hujia Yuan Tunnel, located in the Yuxi County of Shiyan City, is 4,456 meters long and has a maximum burial depth of approximately 200 meters [1] - It is the last tunnel to be completed in the Hubei section and is considered a key project due to its complex geological conditions, including the crossing of three fault zones and a high proportion (84.4%) of grade IV and V surrounding rock [1] Group 3: Construction Challenges and Solutions - The construction faced significant challenges such as high groundwater content and unstable geological conditions, with over 30% of the tunnel located in soft rock areas prone to deformation [1] - The construction unit adhered to principles of safety, quality, speed, environmental protection, and cost-effectiveness, employing advanced support measures like pre-injection grouting to ensure stability and control risks [2] - The use of GIS visualization platforms enhanced process management and allowed for dynamic adjustments to support parameters and excavation methods, ensuring safety during construction [2] Group 4: Strategic Importance - The Xishi High-speed Railway is a crucial component of the national railway network planning and the "13th Five-Year" development plan, designed for a speed of 350 kilometers per hour [2] - Once completed, it will enhance connectivity between the Guanzhong urban agglomeration and the Yangtze River midstream urban agglomeration, promoting socio-economic development along the route [2]

Group 1 - The Chengyu Middle Line High-Speed Railway will operate at a speed of 400 km/h, reducing travel time between Chengdu and Chongqing to 50 minutes upon completion [1] - The railway is a key part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, with a total length of 292 kilometers and a design speed of 350 km/h [2][3] - The railway will connect with several existing and under-construction high-speed rail lines, enhancing the transportation network in the Chengdu-Chongqing area and supporting the development of the Chengdu-Chongqing economic circle [3] Group 2 - The CR450 high-speed train is expected to be the core technology supporting the 400 km/h speed target, with ongoing technological innovations and infrastructure verification [4] - The CR450 train has achieved international leadership in key performance indicators such as operational speed, energy consumption, noise levels, and braking distance, promising a better travel experience [4] - The CR450 train has completed various stages of development, including prototype testing and performance validation, in preparation for trial operations [4][5]

Core Points - The completion of the box girder erection task for the Xi'an to Shiyan high-speed railway marks a significant milestone, allowing the project to enter the bridge deck construction phase [1][3] Group 1: Project Overview - The Xi'an to Shiyan high-speed railway is a crucial part of Shaanxi's "米" shaped high-speed rail network, connecting Xi'an, Shangluo, and Shiyan, with a total new line length of 255.7 kilometers and a design speed of 350 kilometers per hour [2] - The Shaanxi section of the railway is 169 kilometers long and includes five stations: Xi'an East, Lantian, Shangluo West, Shanyang, and Manchuan Pass [2] Group 2: Construction Details - The only precast beam yard for the entire line is located in Lantian, covering an area of 153 acres and responsible for the prefabrication and erection of 698 box girders [2] - The box girder erection faced significant challenges, including multiple crossings over existing roads and high-voltage lines, resulting in high safety risks [2] - The project team implemented strict on-site monitoring and data recording to ensure the safe and orderly erection of the box girders [2] Group 3: Impact and Significance - Once operational, the Xi'an to Shiyan high-speed railway will reduce travel time from Xi'an to Shiyan to under one hour and cut the travel time from Xi'an to Wuhan from five hours to approximately 2.5 hours [2] - The railway will enhance the national high-speed rail network, improving connectivity between Shaanxi and regions such as the Yangtze River Delta and Pearl River Delta, and strengthening ties between the Guanzhong urban agglomeration and the central Yangtze River urban agglomeration [2]