贵州安盘高速古牛河特大桥合龙

Core Viewpoint - The successful completion of the Guuniuhe Grand Bridge marks a significant milestone in the construction of the Anshun-Panzhou Expressway, laying a solid foundation for subsequent engineering progress [1][3][5]. Group 1: Bridge Specifications - The Guuniuhe Grand Bridge spans 881.8 meters and features a main bridge that crosses the Guuniuhe River, utilizing a 520-meter span upper-construction steel box truss arch bridge design [3][5]. - It ranks as the second-largest in the world in terms of span, following the Chongqing Fenglai Daxihe Grand Bridge, which has a span of 580 meters [3]. - The bridge's main arch ring has a maximum lifting segment weight of approximately 290 tons, and its height from the bridge deck to the valley floor is about 400 meters, placing it 15th among the world's tallest bridges [3][5]. Group 2: Construction Challenges and Innovations - Since the initiation of the first segment lifting on June 14, 2025, the project team has overcome multiple challenges, including limited working space, stringent lifting precision requirements, and frequent extreme weather conditions [5][7]. - The project employed a self-developed smart cable lifting system and pioneered precise control technology for lifting trajectories, ensuring that 88 segments were smoothly and accurately positioned [5][7]. Group 3: Technological Integration - Advanced technologies such as 4D BIM, IoT, and big data analytics were integrated into the construction process, utilizing Beidou satellite positioning and various sensors for real-time data collection and analysis [7]. - These technologies provide comprehensive and intelligent solutions for the construction, operation, and management of the Guuniuhe Grand Bridge [7]. Group 4: Economic Impact - The completion of the bridge is expected to shorten the travel distance between Liupanshui and Anshun, thereby promoting high-quality economic and social development along the route [7].