The construction of the Shanghai Suzhou Lake high-speed railway is another crucial city, marking the official closure of the first parallel bridge between the high-speed railway and the fourth line railway in China

Release time:Apr 14, 2024 12:31 PM

At 10:08 am on August 1st, with the completion of the final section of steel box girder welding, the first high-speed and conventional high-speed four track ballastless track cable-stayed bridge with a double sided box reinforced concrete composite beam, the Shanghai Suzhou Lake Railway over Shanghai Xietang Channel cable-stayed bridge, was successfully completed. This marks the completion of the main structure of the special span bridge with the largest span and the most difficult construction of the Shanghai Suzhou Lake high-speed railway, and a major breakthrough has been made in the construction of key and difficult control projects along the entire line, laying a solid foundation for the completion and opening of the entire line.

It is understood that the Shanghai Suzhou Lake high-speed railway starts from Shanghai Hongqiao Station, passes through Suzhou City, Jiangsu Province, and ends at Huzhou Station in Huzhou City, Zhejiang Province. The main line has a total length of about 163.8 kilometers, spanning multiple high-grade waterways and roads, with a total of 137 special span continuous beams, including 17 large span continuous beams over 100 meters.

The cable-stayed bridge of the Shanghai Suzhou Lake high-speed railway crossing the Xietang channel is located in Shihudang Town, Songjiang District, Shanghai. It is a parallel bridge connecting the Shanghai Suzhou Lake high-speed railway with a speed of 350 kilometers per hour and the Shanghai Kunming railway with a speed of 160 kilometers per hour. The total length of the bridge is 460 meters and the main span is 260 meters. It is managed by the Shanghai Railway Hub Construction Command of China Railway Shanghai Bureau and constructed by China Railway Guangzhou Engineering Bureau Group.

"This is the first domestically built double sided box reinforced concrete composite beam four track ballastless track bridge with four parallel lines of a 350 kilometer high-speed railway and a conventional railway. Advanced double sided box reinforced concrete composite beam structure and ballastless track technology were used in construction to enhance smoothness and stability, achieving an overall international advanced level." Tian Xiaoguang, Secretary of the Party Branch of the Shanghai Suzhou Lake Railway Fifth Section Project of China Railway Guangzhou Bureau, told reporters that as the most difficult control project of the entire Shanghai Suzhou Lake high-speed railway, the cable-stayed bridge crossing the Shanghai Xietang Channel has the characteristics of large bridge span, complex structural system, high construction difficulty, and many technological innovations.

The construction of the Shanghai Suzhou Lake high-speed railway is another crucial city, marking the official closure of the first parallel bridge between the high-speed railway and the fourth line railway in China

In order to solve technical difficulties, the construction unit of China Railway Shanghai Bureau Group Shanghai Railway Hub Engineering Construction Command, in conjunction with China Railway Guangzhou Engineering Bureau Group, Central South University, China Railway Fourth Institute and other units, has established a research group to carry out technical breakthroughs. Research has been conducted in 10 directions, including "Key Technology Research on Double sided Box Steel Concrete Composite Beam Cable Stayed Bridge of Ballastless Track in Four Line Railway" and "Research on Line Control of Four Line Railway Separate Double sided Box Steel Concrete Composite Beam Cable Stayed Bridge". Information management methods such as BIM technology have been introduced into the project to continuously optimize and improve construction plans, providing scientific and technological support for engineering construction. At present, 12 invention patents have been formed, including "A Railway Steel Concrete Composite Beam Cable Stayed Bridge and Its Construction Method", and 16 utility model patents, including "A Super Long Hole Pile Reinforcement Connection Structure".

In the specific construction process, technical personnel have overcome the adverse factors of steel beam hoisting, such as large bridge cantilevers and sensitivity of beam width to natural temperature and wind and rain. They continuously monitor and adjust the displacement and lifting tension of the steel beam in real time. Through precise control and precise operation, the accuracy of temporary connecting components is controlled within millimeters, ensuring the bridge's linear shape after steel beam hoisting.

Tian Xiaoguang said that since the commencement of construction, the participating units have overcome the adverse effects of the difficulties in continuous beam construction and line relocation, the high technical requirements for soft soil subgrade construction, the high construction safety risks of adjacent business lines, and the great impact of the COVID-19 on the construction period. They have strengthened quality and safety control, scientifically strengthened construction organization and resource allocation, and focused on scientific and technological innovation and management innovation to ensure the orderly progress of project construction.

At present, 89.2% of the roadbed engineering, 76.3% of the bridge engineering, 16.7% of the track engineering, 9.2% of the station building engineering, and 18% of the four electrical engineering have been completed along the entire Shanghai Suzhou Lake high-speed railway line. The remaining workload of each project is being comprehensively accelerated.

It is reported that after the completion and operation of the Shanghai Suzhou Lake high-speed railway, the core Songjiang hub will become a key node connecting key cities in the Yangtze River Delta, which is of great significance for promoting regional economic and social development along the line and the high-quality integrated development of the Yangtze River Delta.

Weng Leijun, Secretary of the Party Committee of Shihudang Town, stated that he will rely on the construction of the Shanghai Suzhou Lake high-speed railway, fully utilize the location advantages of Shihudang, collaborate with the Songjiang Comprehensive Bonded Zone, and create a functional modern multimodal transportation smart logistics hub led by domestic and international high-speed rail freight, water rail intermodal transportation, and public rail intermodal transportation.

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