北沿江高铁南京特大桥跨滁河斜拉桥顺利合龙

Core Viewpoint - The successful completion of the Nanjing Grand Bridge's main span marks a significant milestone in the construction of the Shanghai-Nanjing-Hefei high-speed railway, transitioning to the bridge deck construction phase [1] Group 1: Project Overview - The Nanjing Grand Bridge and its connecting works span a total length of 14.186 kilometers, with the completed main span of the cross-Chu River cable-stayed bridge measuring 502 meters [3] - The bridge features a dual-tower, five-span hybrid beam cable-stayed design, located in the complex construction environment of the Chu River scenic area in Nanjing [3] Group 2: Technical Innovations - A specialized technical team was formed to address construction challenges, resulting in the successful application for five patents, including one invention patent [5] - The project team optimized the use of anchor cable pipe center positioning auxiliary devices to significantly enhance positioning accuracy and operational efficiency [5] - The development of an intelligent bridge deck hoisting construction method, combined with modular design and smart monitoring, improved the assembly precision and efficiency of the steel box beams, saving approximately 2.3 million yuan in project costs [6] Group 3: Safety and Environmental Measures - A comprehensive intelligent risk prevention system was established to monitor construction processes, utilizing stress monitoring for tower cranes and bridge decks, as well as harmful gas concentration monitoring [8] - The project employed BIM technology for three-dimensional construction simulation to anticipate and mitigate safety risks associated with high-altitude operations and large component hoisting [8] - Eco-friendly construction practices were implemented, including the establishment of ecological protective slopes and measures to control dust and noise pollution, ensuring minimal impact on local residents and aquatic life [10] Group 4: Strategic Importance - The Shanghai-Nanjing-Hefei high-speed railway is a crucial segment of the national "Eight Vertical and Eight Horizontal" high-speed rail network, facilitating major passenger flows and enhancing connectivity between urban agglomerations [12] - The completion of this project will create a new rapid transit corridor among the Shanghai, Nanjing, and Hefei metropolitan areas, contributing to the high-quality development of the Yangtze River Economic Belt and the integration of the Yangtze River Delta [12]