重大突破！深江铁路再传新进展

Core Insights - The completion of the main tower of the Hongqili Waterway Rail-Road Bridge marks a significant milestone in the construction of the Shenzhen-Jiangmen Railway, indicating progress into the next phase of main beam installation and cable construction [1][2] Group 1: Project Overview - The Hongqili Waterway Rail-Road Bridge is a key engineering project in the Greater Bay Area, featuring a dual-tower and dual-cable semi-floating system, showcasing advanced technology and high construction difficulty [1] - The main bridge spans 1.411 kilometers with a main span of 808 meters, utilizing an innovative hybrid steel-concrete box girder cable-stayed bridge structure, designed to efficiently integrate rail and road traffic [1] Group 2: Construction Techniques - The project employed the KTY5000 rotary drill developed by China Railway Bridge Bureau, combined with rotary drilling machines, to enhance the quality and efficiency of the construction of 70 four-meter diameter piles [2] - Advanced techniques such as the dual admixture method of fly ash and mineral powder, along with high-performance water-reducing agents, were used to improve the performance and crack resistance of C60 concrete [2] Group 3: Strategic Importance - Upon completion, the bridge will facilitate a half-hour high-speed rail connection between Shenzhen Qianhai and Guangzhou Nansha, and a one-hour direct link between Shenzhen and Jiangmen, promoting regional integration and development in the Pearl River Delta [2]