昼夜奋战，攻坚一线"不打烊" 图片一季度是铁路建设的"攻坚期"，也是全年投资的"窗口期"。面对有效施工时间短、冬施难度大、春节停工 期长等多重压力，甘肃铁投集团精准研判、分类施策，最大限度挖掘施工潜力，抢抓一切有利时机，以"一刻 不能停、一步不能慢"的紧迫感全力冲刺一季度"开门红"。 天陇铁路新麦积山隧道、武家梁隧道、柏林隧道内，建设者轮班作业、昼夜兼程，掌子面掘进、二衬浇筑有序 推进；兰合铁路西固隧道深处，机械穿梭、焊花飞溅，施工正酣。今年春节，千余名建设者主动留守、扎根一 线，在千米长隧中与坚硬围岩较量，在严寒条件下与工期赛跑，争分夺秒抢抓建设，以实干奏响新春奋进曲。 与此同时，针对兰张三四线铁路武威至张掖段、平庆铁路、西成铁路等因低温进入冬休的工点，甘肃铁投集团 会同项目代建机构未雨绸缪、提前布局，统筹调配劳务资源、物资设备，精细优化复工方案，逐工点明确"时 间表""路线图"，确保节后第一时间"满血复工"、快速起跑，迅速形成实物工作量，为全年建设开好局、起好步 蓄势赋能。 春潮涌动，战鼓催征。当万家团圆共庆新春之际，天陇铁路新麦积山隧道、兰合铁路西固隧道等关键工点依然 机器轰鸣、焊花飞溅。甘肃铁投集团以 ...

Group 1 - The construction of the longest bridge on the Chengyu Middle Line High-Speed Railway, the Longquan Grand Bridge, was completed on January 26, after 150 hours of beam placement work [2] - The bridge spans 14 kilometers, starting from Longquan District in Chengdu and ending in Longtan Street, and features a 72-meter tied arch structure made of reinforced concrete weighing 6,000 tons [2] - The project utilized 24 high-precision hydraulic jacks with a rated lifting capacity of 600 tons each, along with a PLC intelligent hydraulic synchronization system to ensure precise and safe beam placement [2] Group 2 - The Chengyu Middle Line High-Speed Railway is a crucial 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 kilometers per hour [3] - As of now, 25 tunnels and 47 bridges have been completed in the Sichuan section of the Chengyu Middle Line, with the project expected to be completed and operational by 2027, reducing travel time between Chengdu and Chongqing to 50 minutes [3]

Group 1 - The core point of the article highlights the successful completion of the 6000-ton tie-rod arch bridge at the Longquan Grand Bridge, marking a significant milestone in the construction of the Chengyu Central High-speed Railway [1] - The Chengyu Central High-speed Railway is an important part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, with a total length of 292 kilometers and a designed speed of 350 kilometers per hour [1] - The railway line starts from Chongqing North Station, passes through several districts in Chongqing, and connects to the cities of Ziyang and Chengdu in Sichuan, ultimately reaching Chengdu Station [1] Group 2 - The construction of the Sichuan section of the Chengyu Central High-speed Railway is progressing steadily, with 25 tunnels and 47 bridges already completed [1] - The project has now entered a critical phase involving the construction of station buildings, "four electricity" projects, and ballastless track laying [1]

Core Viewpoint - The Chengyu Middle Line High-Speed Railway has achieved significant progress with the successful completion of the "Shu'an" shield tunnel section, marking a crucial milestone for the project's timely completion and operation [3][4]. Group 1: Project Progress - The Shu'an Tunnel, a key project of the Chengyu Middle Line High-Speed Railway, has a total length of 10,380 meters, utilizing both "shield tunneling and open-cut" construction methods, with the shield section measuring 9,824 meters [3]. - The "Shu'an" shield machine, with a diameter of 14.5 meters and a total length of 155 meters, is the largest earth pressure balance shield machine currently in use in China, specifically designed for the local geological conditions [3]. - The project employs two shield machines, "Shu'an" and "Chengyu," which have excavated approximately 5.3 kilometers and 4.5 kilometers, respectively [3]. Group 2: Construction Challenges - The construction of the Shu'an Tunnel involves crossing over 30 significant structures, with a strict settlement control precision of within 1 millimeter per instance, making the construction process highly challenging [4]. - An innovative intelligent construction system has been established, integrating one intelligent device, two management platforms, and one intelligent system, allowing remote monitoring of underground construction dynamics [4]. Group 3: Future Implications - The Chengyu Middle Line High-Speed Railway is a vital part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, with a total length of 292 kilometers and a designed speed of 350 kilometers per hour [4]. - The railway is expected to be completed and operational by 2027, significantly reducing travel time between Chengdu and Chongqing to 50 minutes, thereby enhancing transportation convenience for local residents and supporting the development of the Chengdu-Chongqing economic circle [4].

Core Viewpoint - The successful completion of the "Shu'an" shield section of the Shu'an Tunnel marks a significant milestone for the Chengyu Central High-speed Railway, ensuring the project remains on schedule for completion and operation. Group 1: Project Details - The Shu'an Tunnel has a total length of 10,380 meters, utilizing both "shield tunneling and open-cut methods," with the shield section measuring 9,824 meters, making it the longest and largest diameter earth pressure balance shield tunnel in China [1][3] - The "Shu'an" shield machine has a diameter of 14.5 meters, a total length of 155 meters, and weighs approximately 3,300 tons, making it the largest diameter earth pressure balance shield machine currently in use in China [3] - The project team has developed an intelligent construction system that integrates smart devices and management platforms, enhancing the precision and efficiency of the tunneling process [5] Group 2: Construction Challenges and Innovations - The "Shu'an" shield machine successfully navigated over 30 critical structures, maintaining a strict settlement control precision of within 1 millimeter per instance, showcasing the complexity of the construction [3] - The project employs an intelligent driving system for the shield machine, achieving millimeter-level accuracy in tunneling, and utilizes a digital twin system for real-time data management and risk monitoring [5] - The goal of the project is to achieve a "three-no tunnel" standard, ensuring no damage, no leakage, and no misalignment during construction [5] Group 3: Project Significance and Timeline - The Chengyu Central 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 292 kilometers and a designed speed of 350 kilometers per hour [6] - The railway is expected to be completed and operational by 2027, with a potential maximum operational speed of 400 kilometers per hour, significantly reducing travel time between Chengdu and Chongqing to 50 minutes [6]

Group 1 - The Chengda-Wan High-Speed Railway (成达万高铁) has entered the long rail storage phase, with the arrival of a train carrying 500-meter long steel rails at the Nanchong North laying base, laying the groundwork for subsequent track laying construction [1] - The Nanchong North laying base covers an area of approximately 52,000 square meters, with the first batch of 50 rails weighing a total of 1,500 tons, capable of laying 12.5 kilometers of track [1] - The use of 500-meter long rails significantly reduces track joints compared to traditional short rails, enhancing train operation stability and safety [1] Group 2 - The Chengda-Wan High-Speed Railway is a crucial part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, stretching 477 kilometers from Chengdu to Wanzhou, with a design speed of 350 kilometers per hour [2] - Upon completion, the railway will provide a convenient passenger transport corridor from Chengdu to the Central Plains and Beijing-Tianjin-Hebei regions, playing a significant role in promoting the Chengdu-Chongqing economic circle and the development of the Yangtze River Economic Belt [2]

Core Viewpoint - The Shanghai Metro Jia Min Line, constructed by China Railway 16th Bureau, has made significant progress with the successful breakthrough of the right-line shield machine "Ding An No. 2" at the section between Chengbei Road Station and Xincheng Road Station, reaching over 1000 rings [1] Group 1: Project Progress - The section is approximately 2.55 kilometers long, primarily consisting of weak geological layers, and requires crossing numerous underground pipelines, bridges, and buildings [1] - The project team has enhanced construction efficiency and quality by installing a soil weighing and posture automatic correction system, utilizing digital methods for dynamic parameter control [1] - An innovative "three-step cleaning method" has been adopted to address water accumulation at the shield tail, along with the establishment of a special responsibility system [1] Group 2: Safety and Communication - A comprehensive three-network integration communication system has been deployed within the tunnel to achieve seamless signal coverage, enabling rapid location and response to emergencies, thereby improving emergency communication capabilities and safety management efficiency [1] Group 3: Project Significance - The Jia Min Line spans 44.04 kilometers and serves as a major north-south trunk line in Shanghai, connecting Jiading New Town, Hongqiao Hub, and Minhang [1] - Upon completion, the line will alleviate traffic pressure on the Hongqiao Hub and contribute to the construction of the Yangtze River Delta rail transit network [1]

Group 1 - The Cheng-Mei Line's elevated section in Meishan has successfully achieved "bridge connection," marking the completion of the 32-kilometer elevated main line, transitioning to the next phase of track laying and electromechanical installation [2] - The last pre-cast box girder, measuring 30 meters in length and weighing approximately 500 tons, was precisely placed at the junction of the elevated and underground sections, highlighting the challenges of precision control in construction [2] - The construction team implemented strict speed controls during the transportation and installation of the girder, with speeds not exceeding 3 kilometers per hour during transport and 1 meter per minute during the final placement phase, ensuring high precision [2][3] Group 2 - As of now, 11 out of 13 stations along the Cheng-Mei Line have completed their main structures, with 9 tunnel boring machines achieving a total excavation completion of 99% [3] - The pre-casting of box girders is 87% complete, with 75% of the girders already installed, and track laying has reached 35% completion [3] - The shield tunnel section in the Meishan segment has been fully "tunnel connected," and the elevated section has achieved "bridge connection" [3]

Core Viewpoint - The construction of Nanjing North Station is progressing rapidly, with significant infrastructure developments aimed at enhancing regional connectivity and supporting economic growth in the Yangtze River Delta region [1][6]. Group 1: Construction Progress - The Nanjing North Station project includes three main parts: the front station, station building, and rear station, with the front section primarily serving the Ninghuai Intercity Railway [1]. - The Nanjing Special Bridge, a key component of the project, features a total of 67 piers and spans approximately 2.5 kilometers, with the recently completed continuous beam consisting of 18 segments [3]. - The continuous beam design employs an innovative "single box double chamber" structure, enhancing torsional performance and lateral load capacity [3]. Group 2: Construction Techniques - The project utilizes a large-span fully enclosed hanging basket construction technique, which minimizes noise and dust while ensuring the normal flow of traffic on the busy Hu-Shan Expressway [3]. - The construction process incorporates a "smart construction site" system, which includes real-time monitoring of structural parameters through hundreds of sensors, ensuring quality control within millimeter precision [5]. Group 3: Safety and Quality Management - Safety measures include the installation of bolt loosening warning devices and visual alarm systems on cranes, providing dual safety guarantees during high-altitude operations [5]. - A comprehensive steel structure protection system has been established to prevent falling objects, along with 24-hour monitoring and emergency response plans in collaboration with traffic management authorities [5]. Group 4: Future Developments - Upon completion, Nanjing North Station will serve as a crucial hub for the North Yangtze River artery, facilitating integrated development in the Yangtze River Delta and the Yangtze Economic Belt [6]. - The city plans to accelerate the construction of related projects, including the North Yangtze River High-Speed Railway and the Ninghuai Intercity Railway, to enhance urban influence and connectivity [6].

Core Viewpoint - The completion of the overall lifting of the steel structure grid at Anyue Station marks a significant milestone in the construction of the Chengyu Middle Line High-speed Railway, transitioning the project into the decoration and renovation phase [2] Group 1: Project Details - Anyue Station is located in Sixian Town, Anyue County, Ziyang City, with a total construction area of approximately 8,000 square meters and a station scale of 2 platforms and 4 tracks [2] - The entire roof steel grid weighs about 245 tons and creatively integrates regional architectural features with modern engineering technology, resembling the unique shape of the "Thousand-Year Stone Carving Reclining Buddha" [2] Group 2: Construction Techniques - The overall lifting of the grid is a critical procedure in the station building project [2] - To ensure construction quality and effectiveness, the project team utilized Building Information Modeling (BIM) technology to create a high-precision model and visual animation for the lifting process [2] - The construction team conducted strict risk assessments and plan validations, implementing safety management to ensure the safe and smooth progress of the grid lifting operation [2]