Group 1 - The construction of the first phase of the north anchor of the Zhang Jinggao Yangtze River Bridge has been completed, marking the full completion of the first phase for both the north and south anchor projects, allowing the bridge construction to enter the upper structure construction phase, including catwalk installation and main cable installation [1] - The anchor is described as the "stabilizing force" for large bridges, playing a crucial role in ensuring the overall structural stability of the bridge [1] - The north anchor of the bridge employs a left-right symmetrical split-type triangular frame gravity anchor, with a foundation made of caisson, and features two split-type anchor bodies to bear the main cable tension [1] Group 2 - The first phase of the project includes the construction of the anchor foundation, anchor body, anchoring system, and some auxiliary facilities [1] - After the installation of the upper structure's main cable is completed, the project will transition to the second phase, focusing on the construction of the top slab and front wall of the front anchor chamber, as well as the completion of remaining auxiliary works [1]

Core Insights - The completion of the upper beam on the south main tower of the Zhang Jinggao Yangtze River Bridge marks a significant milestone in the construction process, transitioning from the substructure to the superstructure phase [1][2] - The bridge, featuring a main span of 2300 meters, is recognized as the world's largest span suspension bridge, with both main towers standing at 350 meters, making them the tallest suspension bridge towers globally [1] - The innovative "steel box-steel pipe concrete constraint combination system" used in the main towers reduces the self-weight by approximately 50% while enhancing wind and seismic resistance by 30% [1] Construction Details - The construction of the south main tower took over 630 days, involving meticulous organization for each lifting and precise alignment of segments, showcasing the team's dedication and expertise in bridge engineering [2] - The upper beam installation involved three segments, with the heaviest segment weighing 262 tons, utilizing the world's first 10,000-ton meter tower crane and advanced full-section welding techniques [1] - The project team employed 3D digital technology for simulation, achieving high precision in the welding seam width, controlled between 6 to 10 millimeters, ensuring a stress-free and accurate connection during the assembly [1] Future Implications - The Zhang Jinggao Yangtze River Bridge is expected to be completed by 2028, significantly reducing travel time between Suzhou Zhangjiagang, Taizhou Jingjiang, and Nantong Rugao, thereby optimizing the layout of the Yangtze River mainline crossing channels [2]

Core Points - The Zhang Jinggao Yangtze River Bridge has completed the main tower construction for both the south and north navigation bridges, marking a transition from substructure to superstructure work [1] - The south navigation bridge features a main span of 2300 meters and is currently the tallest suspension bridge in the world, with both main towers standing at 350 meters [3] - The steel usage for a single main tower is approximately 34,000 tons, equivalent to the steel used in 4.6 Eiffel Towers [3] - The main towers utilize an innovative "steel box-steel pipe concrete constraint composite system," reducing the self-weight of the towers by about 50% and enhancing wind and seismic resistance by 30% [3] - The construction employs a modular assembly approach, with tower columns made of 30 prefabricated segments [3] - The installation of the upper crossbeam involved three segments, with the heaviest segment weighing 262 tons, using a world-first 10,000-ton level tower crane [4] - Advanced 3D digital technology was utilized for the entire process simulation, achieving high precision in the welding seams [4] - Key construction points for both navigation bridges are progressing simultaneously, laying a solid foundation for the subsequent cable system installation [6]

Core Viewpoint - The Zhang Jinggao Yangtze River Bridge has reached a significant construction milestone with the completion of the main towers for both the south and north navigation bridges, marking a transition from substructure to superstructure work [1][3]. Group 1: Construction Progress - The main towers of the south and north navigation bridges have been capped, completing the main structural work of the four towers [1]. - The south navigation bridge features a main span of 2300 meters, setting a world record for the largest span bridge [3]. - The two main towers of the south navigation bridge stand at 350 meters, making them the tallest suspension bridge towers globally [3]. Group 2: Engineering Innovations - The main tower construction utilizes a world-first "steel box-steel pipe concrete constraint composite system," reducing the tower's self-weight by approximately 50% while enhancing wind and seismic resistance by 30% [5][6]. - The tower columns are assembled in a modular fashion with 30 prefabricated segments, akin to building with blocks [6]. - The project team has achieved high-precision jointing under stress-free conditions, laying the groundwork for the subsequent installation of the cable system [6]. Group 3: Strategic Importance - The completion of the bridge is expected to significantly contribute to the integrated development of the Yangtze River Delta, optimize the river's crossing channels, and improve the regional road network layout [6].

Core Insights - The construction activities along the Yangtze River and Jianghuai Plain are experiencing a significant surge, with a focus on enhancing transportation infrastructure and logistics efficiency [1][2][4] Investment and Progress - In the first three quarters, the province completed transportation fixed asset investment of 185.8 billion yuan, accounting for 80.8% of the annual investment plan, exceeding the scheduled progress [1] - The province aims to complete a total transportation investment of 230 billion yuan for the year, ensuring high-quality completion of various work targets [1] Railway Construction - The North Jiangsu High-Speed Railway is progressing rapidly, with the completion of 98% of box girder erection and plans to finish beam erection by the end of November [2] - The total investment in railway projects reached 40.069 billion yuan in the first three quarters, with a strong push to meet annual construction targets in the fourth quarter [3] Bridge and Tunnel Developments - The Zhang Jinggao Yangtze River Bridge construction is advancing, with key engineering components like pile foundations and segment beams being completed [4] - The Jiangyin-Jingjiang Yangtze River Tunnel is also progressing, with 80.27% of the annual plan completed, expected to be operational by 2028, significantly reducing crossing time [5] Highway Expansion - The expansion of the Hu-Wu Expressway is underway, with 90.9% of the annual plan completed, aiming for basic completion by the end of the year [6] - The Jiangsu section of the Weishan-Suzhou High-Speed Railway has initiated box girder prefabrication and erection, transitioning to upper structure construction [3][7]

Core Insights - The transportation fixed asset investment in China reached 2.6 trillion yuan in the first three quarters of the year, maintaining a high level of investment [4] - Major transportation projects are entering critical construction phases, including the completion of the main towers of the Zhangjinggao Yangtze River Bridge and the initiation of the main structure construction of the Xiamen Jinmen Bridge [1][2] Investment Overview - The transportation fixed asset investment breakdown includes: - Railways: 593.7 billion yuan - Highways: 1.78 trillion yuan (with expressways at 929.6 billion yuan, national and provincial roads at 434.3 billion yuan, and rural roads at 275.3 billion yuan) - Waterways: 160.5 billion yuan - Civil aviation: 82.9 billion yuan [4] Project Progress - The Zhangjinggao Yangtze River Bridge, which connects multiple cities and is expected to be completed by October 2028, has all four main towers completed [1] - The Xiamen Jinmen Bridge, a key project for connecting Fujian coastal areas with Kinmen Island, has achieved 37% overall progress since construction began in January 2024, aiming for sea mainline traffic by the end of 2026 and full completion by 2027 [2] - The Pinglu Canal project, a significant infrastructure initiative, has completed 84.8% of its total investment, with substantial progress in earthworks and concrete pouring for the lock structures [3][4]

Core Points - The completion of the northern anchor pier construction for the Zhang Jinggao Yangtze River Bridge marks a significant milestone, being the first anchor body completed along the entire line, laying the foundation for the subsequent main cable installation [1] - The bridge features a main span of 1208 meters and the northern anchor serves as the ultimate anchoring point for the main cable, which must bear the entire load and safely transmit forces to the deep foundation [1] - The completed saddle support pier is a critical component of the northern anchor system, designed to support the heavy saddle that will distribute the main cable's load [1] Construction Techniques and Quality Control - The project team implemented precise strategies to address technical challenges and quality control requirements, including high-precision measurement and strict control of template positioning and embedded component installation [3] - An intelligent temperature control system for large-volume concrete was utilized to ensure the quality of the concrete during construction, maintaining safety and control throughout the process [3]

Core Viewpoint - The Zhang Jinggao Yangtze River Bridge, currently under construction, is set to be the world's largest span bridge, significantly enhancing transportation efficiency and promoting regional integration in the Yangtze River Delta area. The associated 220 kV power line relocation project is crucial for the bridge's completion by 2028 [1][2]. Group 1: Project Overview - The Zhang Jinggao Yangtze River Bridge connects Zhangjiagang, Taizhou Jingjiang, and Nantong Rugao, marking a milestone in China's bridge engineering by surpassing a 2000-meter span [1]. - The power line relocation involves the construction of 36 new towers and the dismantling of 32 old towers to facilitate the elevated road construction [1]. Group 2: Operational Details - A large-scale power outage is scheduled from September 29 to November 5 to ensure safety during the relocation work, affecting multiple 220 kV lines [2]. - The State Grid Zhangjiagang Power Supply Company has coordinated with key enterprises to minimize the impact of the power outage, ensuring continuous power supply during critical operations [2]. Group 3: Construction Progress - During the holiday period, construction workers are working overtime to expedite the project, with significant progress made on the installation of the B6 tower, completed ahead of schedule [3]. - Workers are engaged in physically demanding tasks, often working over eight hours a day at heights, demonstrating commitment to meeting project deadlines [3].

Core Points - The Zhang Jinggao Yangtze River Bridge construction has made significant progress with the completion of the south main tower's crossbeam hoisting [1][3] - The bridge features the world's largest main span of 2300 meters, connecting the cities of Suzhou, Taizhou, and Nantong in Jiangsu Province [3][7] Construction Details - The north and south main towers of the bridge utilize a door-type steel box structure, standing at a height of 208 meters (excluding the tower crown) [3] - The upper crossbeam consists of five precision segments, weighing approximately 640 tons, with strict control of joint gaps within 10 millimeters [3][5] - The hoisting segment of the south main tower measures 8 meters in width, 8 meters in length, and 9.1 meters in height, weighing 115 tons, and was lifted to a height of 100 meters with millimeter-level precision [5] Technological Integration - The project team employed advanced digital tools, utilizing BIM technology for full-process dynamic simulation of the hoisting operation, identifying and mitigating safety risks and quality issues [5] - A digital twin system was used to reconstruct the steel tower structure in a virtual environment, allowing for multi-dimensional simulation verification [5] Strategic Importance - Upon completion, the Zhang Jinggao Yangtze River Bridge will play a crucial role in promoting integrated development in the Yangtze River Delta, optimizing the river's crossing channels, and enhancing regional road network layout [7]

Core Insights - Jiangsu Province is accelerating the construction of water, land, and air infrastructure, showcasing significant "super projects" that reflect the speed of development in the region [1] Infrastructure Development - The Changtai Yangtze River Bridge, which began construction in 2019, is expected to be completed by 2025, significantly reducing travel time between Taizhou and Changzhou [1] - The Zhangjingao Yangtze River Bridge and the Haitai Yangtze River Tunnel, the latter being the world's longest underwater shield tunnel for road traffic, are also under construction [1] - Jiangsu has completed 20 cross-river passages, with multiple projects in progress, facilitating convenient travel for residents along the river and promoting the integration of cross-river urban clusters and the Yangtze River Delta [1] Economic Impact - These infrastructure projects are contributing to the high-quality economic development of the region [1]