The world's first high -speed railway concrete beam holding bridge!

Recently, the world ’s first high -speed railway concrete beam cable bridge -the main bridge of the Zengjiang Extra Bridge of the Guangshan Railway successfully coexist.

The Zengjiang Extra Bridge is a controlled project of Guangshan Railway. It is located in Shidan Town, Zengcheng District, Guangzhou, with a total length of 2569 meters. Among them, the main bridge uses the double tower cable -stayed bridge, the main crossing of 260 meters across the main channel of Zengjiang, and the main tower adopts the main tower. Reinforced concrete H bridge tower, the tower is 100 meters high.

The bridge is the world's first railway concrete beam cable -stayed bridge that has been used in prefabricated assembly technology in the world. The concrete beams of the large section are completed in the factory prefabricated in the factory. This can not only greatly shorten the construction cycle, but also realize the intelligent, standardized, and modular prefabricated construction of the bridge, which will greatly promote the development of my country's railway concrete cable -caving bridge construction technology and concrete beam section pre -assessment method.

In order to adapt to the characteristics of the prefabrication of the beam body, the "blending" technology is also adopted in the design, that is, two types of prestressed tendons are used in the beam body -the prestressed steel bars of the fine rolling threaded The steel bar can be flexibly arranged, and the prestressed steel twisted line can reduce "relaxation", which greatly improves the characteristics of structural stress, and ensures that the bridge is more secure, economical and reasonable.

此外，项目团队还从古代榫卯结构中获得灵感，创新性地提出了“大齿块剪力键构造设计”——在梁体节段中采用大齿块构造措施，“积木”之间如卯榫Subtoxionally bite, tightly connected together.

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