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Closure of World's First High-speed Railway Cable-stayed Bridge with Large-span Segmental Precast Concrete Girder
Source: Date:2022年09月26日

Anthem of CREC—“Trailbreaker”

On September 13, China Railway Guangzhou Engineering Group, a subsidiary of CREC, completed the closure of the Zengjiang Bridge in Guangshan high-speed railway, the main traffic artery of the Guangdong-Hong Kong-Macao Greater Bay Area. The bridge is the first high-speed railway cable-stayed bridge in the world to adopt a large-span segmental precast concrete girder and also the first high-speed railway bridge in the world to adopt a large-span segmental precast glue assembly method.

The picture shows the closure of Zengjiang Bridge.

The Guangzhou-Shantou high-speed railway line, with a total length of about 369 kilometers, is an essential part of the "five vertical and two horizontal" high-speed railway backbone network in Guangdong Province. Zengjiang Bridge is the control project of the whole line. It is a concrete cable-stayed bridge with double towers and double cable planes, with a total length of 2569.48 meters. The main span is 260 meters across the Zengjiang River. The main tower is an H-shaped tower with a height of 100 meters.

The builders of the bridge have created four highlights in the construction. Firstly, the segmental beams are ingeniously prefabricated by the symmetrical short-line method. Secondly, for the first time in the world, large-span segmental precast concrete beams are used to construct high-speed railway cable-stayed bridges, and the large-span segmental precast glue splicing method is used to build high-speed railway bridges. Finally, the segmental beam erection adopts the asymmetric synchronous erection construction of the side and middle span, which shortens the construction period by 45 days. In addition, precise control with total precision station + 3D scanner technology.

After the Guangzhou-Shantou high-speed railway line is completed and opened to traffic, the distance between Guangzhou and Shantou will be reduced to less than 2 hours, which shortens the space-time distance between the eastern part of Guangdong and the Guangdong-Hong Kong-Macao Greater Bay Area, and accelerates the integration of the eastern part of Guangdong into the Guangdong-Hong Kong-Macao Greater Bay Area, which is of great significance for promoting the economic development of the eastern region of Guangdong and promoting the balanced and coordinated economic development of Guangdong Province.

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