China Railway First Bureau undertakes Asian prestressed concrete dwarf pagodas and the widest bridge to open to traffic

Wen Yang Zhongming Wang Xinglong

The construction lasted for 4 years. On September 21, the Mafang Bridge of Zhaoqing East Avenue 3rd in Zhaoqing East Avenue, which was established by the China Railway First Bureau, was officially completed and opened to traffic.

The Martin Bridge overlooks the picture

The Mafang Bridge is located at the junction of Foshan and Zhaoqing. It is connected to the east and west sides of Beijiang, with a total length of 1639 meters, a main bridge of 455.35 meters long, and an ultra -wide single -box four -chamber oblique board -type consecutive box beam with a main beam of 44.85 meters. Type prestressed concrete dwarf tower cable -stayed bridge. The main road of the bridge is two -way six lanes, with a design speed of 80 km/h; the auxiliary road is one -way two lanes, the design speed is 40 km/h.

Mafangt Bridge

Mafangt Bridge

Since the construction of the project, the participating units have overcome difficulties such as new crown pneumonia, complex construction, and difficult construction. They used the bridge BIM three -dimensional model to simulate the construction process, investigate the conflict between the main bridge diamond -shaped hanging basket truss and the position of the cable cable, and intervened in advance during the construction to timely adjust and optimize the construction organization design, which greatly improved the safety quality progress. Since the main tower of the bridge is a "H" type of some curve, the construction team uses the Sota model to build a Sota line type; Quality; Suo saddle uses adjustable bracket devices and high -precision all -site instruments for space positioning to ensure accurate installation of cable cables; it also exceeds the continuous irrigation of super -deep and deep pile foundations, and double -hole pile bases of 100 meters. Excluding technical problems such as the installation of the main reinforced reinforcement holes. At present, the project has obtained 22 provincial and ministerial level and national scientific and technological innovation achievements, of which 9 of invention patents and practical new patent certificates have been obtained, filling a number of gaps in the domestic deep -water bridge field.

Source: China China Railway

Edit: Jia Qi

Review: Xiangwen

School counterpart: Lulu

Editor: Deng Zhuo

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