成达万高铁是我国"八纵八横"高速铁路网沿江通道的重要组成部分，线路全长486.4公里，其中新 建铁路432.4公里，设计时速350公里，建成后将成为四川东向出川的重要快速便捷大通道。 目前，里程125公里的成达万高铁达州段，桥梁架梁累计完成95%，无砟轨道道床累计完成10%。 同时，高铁达州南站高架站房主体结构（含钢结构）已全面封顶。 本报讯 记者近日从达州市铁路建设服务中心获悉，随着全长4288米的峨层山隧道等贯通，成达万 高铁达州段隧道已全部贯通，为成达万高铁如期建成打下坚实基础。 达州段是成达万高铁全线隧道分布最密集的区段之一，有全线重难点控制性工程华蓥山隧道、全 线四座高瓦斯高风险隧道之一的长胜隧道等关键工程。据了解，自2020年底，成达万高铁开工建 设以来，达州坚持"铁事特办"理念，在用地保障、地材供应等方面倾力支持，努力为高铁建设提 供优良施工环境。 ...

Core Insights - The China National Railway Group reported a fixed asset investment of 46.3 billion yuan in railway construction for January 2026, marking a year-on-year increase of 5.5%, indicating a strong start for the year and a positive impact on overall social investment [1] Group 1: Investment and Progress - The railway construction sector is focusing on major national strategies and regional economic development, leveraging the advantages of a long industrial chain and broad influence [1] - Key projects such as the Jin Jian High-Speed Railway from Lanxi to Jiande have entered trial operation, while static acceptance work has begun for the Shandong section of the Xiong'an New Area to Shangqiu High-Speed Railway and the Xi'an to Shiyan High-Speed Railway [1] - Various construction units are optimizing construction organization and ensuring safety and quality management during winter construction, with significant progress reported in multiple projects across different provinces [1] Group 2: Future Plans - The China National Railway Group aims to accelerate the construction of a world-class modern railway network, focusing on connectivity, network supplementation, and chain strengthening [2] - The group plans to enhance construction organization, widely apply new engineering technologies and processes, and strengthen controls over safety, quality, investment, and environmental protection to effectively promote key railway projects [2]

Core Viewpoint - The completion of the main structure of the Dazhou South Station for the Chengdu-Dazhou-Wanzhou High-Speed Railway marks a significant milestone, paving the way for subsequent decoration and supporting engineering work [1][4]. Group 1: Project Overview - Dazhou South Station is located in Dazhou City, Sichuan Province, serving as a crucial junction for the Chengdu-Dazhou-Wanzhou and Xiyu High-Speed Railways, featuring a total of 7 platforms and 16 tracks [3]. - The station building combines side and elevated designs, covering a total area of approximately 53,000 square meters, with three floors and an underground space [3]. Group 2: Design and Construction Challenges - The design of the station incorporates elements from the Ba Mountain Grand Canyon, symbolizing "the divine bird spreading its wings" and reflecting regional characteristics through an abstract representation of the word "Dazhou" [3]. - The construction faces challenges such as high space, super-span trusses, and simultaneous operations of multiple towers, with the maximum formwork height reaching 16.3 meters and the maximum truss span at 72 meters [3]. Group 3: Current Progress - As of now, the metal roofing of the side station has been completed, the curtain wall work is 30% finished, and the corrosion-resistant metal roofing of the columned rain shelter is 40% complete, with the project entering a critical phase of decoration and renovation [4]. - The Chengdu-Dazhou-Wanzhou High-Speed Railway spans 477 kilometers from Chengdu Tianfu Station to Wanzhou North Station, with a design speed of 350 kilometers per hour [4].

Core Insights - The Chengyu Middle Line High-Speed Railway, Chengda-Wanzhou High-Speed Railway, and Yukun High-Speed Railway are making significant progress in construction, enhancing connectivity in the region [1][4][10] Group 1: Chengyu Middle Line High-Speed Railway - The Chengyu Middle Line High-Speed Railway is approximately 292 kilometers long with a design speed of 350 km/h, expected to be completed by 2027, reducing travel time from Chengdu to Chongqing to about 50 minutes [4] - Key construction milestones include the successful completion of signal replacement and line switching at the Biali Station, facilitating the railway's integration into Chengdu Station [1][2] Group 2: Chengda-Wanzhou High-Speed Railway - The Chengda-Wanzhou High-Speed Railway's fifth segment has successfully placed the last box girder, measuring 32.6 meters long and weighing 700 tons, as part of a critical construction phase [5][7] - The project aims to complete all bridge construction tasks before the Spring Festival, with a focus on ensuring high precision in the box girder installation [7] Group 3: Yukun High-Speed Railway - The Yukun High-Speed Railway has achieved a significant milestone with the safe completion of the Huashan Song Tunnel, leaving only one tunnel remaining in the Yunnan section [10][11] - The railway spans approximately 700 kilometers, with the Yunnan section being 388.6 kilometers long, and is expected to enhance economic connectivity between the Chengdu-Chongqing economic circle and the central Yunnan urban cluster [13]

Project Overview - Tianfu Station is located in Chengdu and serves as the starting point for the Chengdu-Dazhou-Wanzhou high-speed railway, with a total construction area of approximately 612,000 square meters, making it the largest railway station building in Sichuan [1] - The station features a total of 12 platforms and 22 tracks, with a structure comprising 3 above-ground levels and 2 underground levels [1] Project Progress - The installation of the ceiling and internal construction is nearing completion, with the next phase set to begin the decoration work, aiming for overall completion by 2026 [2] Construction Details - The construction team, consisting of over 600 workers, has been working continuously for more than a month, with the installation of the outer facade and indoor ceiling expected to be completed by the end of the month [6] - Tianfu Station is recognized as the first in the country to adopt the "rib-ring large opening single-layer shell structure" for railway station buildings, presenting significant construction challenges due to its large area and complex design [6] Design Features - The design concept of Tianfu Station is based on "building a nest to attract phoenixes," featuring numerous curved elements that resemble a soaring phoenix [6] - The main visual focus of the station is the "Phoenix Eye," a non-concentric ellipsoidal steel shell structure, which is the largest single-span non-concentric ellipsoidal glass curtain wall structure in China [8] - Advanced technologies such as "Rhino + GH" software and 3D laser scanning are employed to ensure precision in the construction of the "Phoenix Eye" [8] High-Speed Railway Development - Tianfu Station is the starting point for the Chengdu-Dazhou-Wanzhou high-speed railway, which will have a speed of 350 km/h and is expected to connect various cities in Sichuan and Chongqing, with completion anticipated in 2027 [10] - Construction is progressing on seven new stations along the line, with all currently in active construction phases [10] Tunnel Construction - The key tunnel connecting Sichuan and Chongqing, known as the Guangming Tunnel, has been completed, measuring 8,468.8 meters in length, with significant challenges faced during construction [12] - The project management team has implemented enhanced safety measures and utilized advanced equipment to ensure construction efficiency and safety [12] Overall Railway Infrastructure - Approximately 46 million cubic meters of earthworks have been completed for the Chengdu-Dazhou-Wanzhou high-speed railway, accounting for 98.87% of the total, with all bridge foundations and piers completed [14] - The railway network in Sichuan has expanded to cover 21 cities and towns, with operational railway mileage exceeding 7,000 kilometers, ranking 11th in the country for high-speed railway mileage [14]

Core Viewpoint - The Chengda-Wanzhou High-Speed Railway (成达万高铁) is a significant infrastructure project in China, with the completion of the Guangming Tunnel marking a key milestone in its construction. The railway is expected to enhance connectivity between major cities, reducing travel time significantly by 2027 [3][5]. Group 1: Project Progress - The Guangming Tunnel, a critical component of the Chengda-Wanzhou High-Speed Railway, has been completed, with 132 out of 136 designed tunnels already finished [3]. - The project has entered the construction phase for the ballastless track bed, station buildings, and electrical systems [3]. - The entire railway line has completed approximately 46 million cubic meters of earthworks, accounting for 98.87% of the total [4]. Group 2: Technical Details - The Guangming Tunnel spans over 8 kilometers and is designed for a speed of 350 kilometers per hour, featuring a single-hole double-track low-gas tunnel [3]. - The construction faced challenges such as unstable surrounding rock, mud and water bursts, and the presence of harmful gases, necessitating advanced safety measures [3][4]. - The project management team utilized specialized mining explosives and digital detonators to enhance safety during construction [3]. Group 3: Strategic Importance - The Chengda-Wanzhou High-Speed Railway is a vital part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, connecting key regions [5]. - Upon completion in 2027, the railway will reduce travel time from Chengdu to Shanghai and Beijing to under 7 hours [3][5].

Core Insights - The Chengdu-Dazhou-Wanzhou High-Speed Railway (referred to as Chengda-Wan High-Speed Railway) is a significant infrastructure project that is expected to be completed and operational by 2027, reducing travel time from Chengdu to Shanghai and Beijing to under 7 hours [2][3] Group 1: Project Progress - The railway's tunnel engineering includes the design of 136 tunnels, with 132 already completed, and the project has now entered the construction phase for ballastless track beds, station buildings, and electrical systems [2] - The Guangming Tunnel, a key component of the project, spans over 8 kilometers and is designed for a speed of 350 km/h, featuring a single-tube double-track low-gas tunnel [2] Group 2: Construction Challenges and Solutions - The construction faced significant challenges, including unstable surrounding rock, mud and water bursts, and the presence of harmful gases, which posed high safety risks [2][3] - The project management team implemented higher safety standards by using specialized mining explosives and digital detonators, along with enhanced ventilation and monitoring systems to ensure safety during construction [2] - Over 600 workers are engaged in simultaneous construction across four work fronts, successfully overcoming various difficulties related to the tunnel [3] Group 3: Overall Project Status - Approximately 46 million cubic meters of earthworks have been completed, accounting for 98.87% of the total, with all bridge pile foundations, caps, and pier bodies finished, and three out of four turning bridges completed [3] - The Chengda-Wan High-Speed Railway is an essential part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, connecting key cities in Sichuan and Chongqing [3]

Core Points - The Chengdu-Dazhou-Wanzhou High-Speed Railway (Chengda-Wan High-Speed Railway) has successfully completed the key engineering project, the Guangming Tunnel, which is a significant milestone in the construction of this railway [1][3] - The railway is designed to connect key regions in Sichuan and Chongqing, with a total length of over 8 kilometers and a design speed of 350 km/h [3][7] - The project is part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, expected to be completed and operational by 2027, significantly reducing travel time between Chengdu and major cities like Shanghai and Beijing to under 7 hours [7] Construction Progress - The overall tunnel engineering design includes 136 tunnels, with 132 already completed, achieving a completion rate of nearly 97% [1] - The construction team has successfully addressed various challenges, including sudden mud and water inflow, gas, and harmful gas exceedances, with over 600 workers operating across four work fronts [5][7] - The project has completed approximately 46 million cubic meters of earthworks, representing 98.87% of the total earthworks required [7] Safety Measures - To mitigate risks associated with harmful gases like methane and hydrogen sulfide, the project management team has employed higher safety-grade explosives and digital detonators, along with enhanced ventilation and monitoring systems [5] - The use of intelligent construction equipment has improved efficiency and reduced labor intensity, ensuring that safety and quality targets are met [5]

Core Points - The Chengda-Wanzhou High-Speed Railway (成达万高铁) has successfully completed the key construction milestone of the Quxi River Grand Bridge, which is a significant step towards its completion [3] - The bridge is the world's largest double-track high-speed railway prestressed concrete low-tower cable-stayed bridge, with a main span of 278 meters and a total length of 557.5 meters [3] - The construction team utilized innovative techniques such as the "suspension method" and conducted the final segment during nighttime to minimize temperature-induced structural deformation [3] Construction Progress - The Quxi River Grand Bridge is part of the challenging "4 tunnels and 4 bridges" control project along the Chengda-Wanzhou High-Speed Railway [3] - Currently, 130 out of 136 tunnels along the railway have been completed, with bridge construction at 86% and roadbed construction at 96% [3] - The project is now entering the phases of ballastless track, station building, and electrical engineering [3]

Core Viewpoint - The successful completion of the Quxiang Grand Bridge marks a significant milestone for the Chengdu-Dazhou-Wanzhou high-speed railway project, enhancing the infrastructure of China's high-speed rail network [1] Group 1: Project Details - The Quxiang Grand Bridge, constructed by China Railway Fifteenth Bureau, spans a total length of 1983.81 meters, with the main bridge being a prestressed concrete cable-stayed bridge measuring 557.5 meters [1] - The project team implemented a scientifically efficient construction plan, optimizing concrete pouring timing and mix design to achieve millimeter-level precision in the connection of the bridge segments [1] Group 2: Strategic Importance - The Chengdu-Dazhou-Wanzhou high-speed railway is a crucial part of the national "eight vertical and eight horizontal" high-speed rail network, with a total length of approximately 477 kilometers [1] - Once operational, the travel time from Chengdu to Chongqing via Dazhou will be reduced from around 5 hours to under 2 hours, significantly improving connectivity in the region [1]