What Is The Bailey Bridge?

Bailey bridge, also known as prefabricated steel bridge, is mixed with these two names in many places, and even the two words Bailey bridge and steel bridge are equal. Strictly speaking, steel bridge ≠ Bailey bridge, steel bridge includes Bailey bridge, only fabricated steel bridge = Bailey bridge. Steel bridges are defined by manufacturing materials. The main feature of Bailey bridges is modularity, while the scope of steel bridges is wider. Literally, it can be said that bridges whose main body is a steel structure can be called steel bridges. . It's just that the Bailey bridge is more typical and the most widely used. Relatively speaking, the term prefabricated steel bridge is closer to the original meaning of Bailey bridge, and it can also be said to explain what Bailey bridge is in another sense.

1. With the development of China's hydropower construction, the water-level development of most of the rivers has been extended to the upper reaches. The project sites are mostly located in complex terrain, inaccessible to the western mountainous areas, and the access roads serving the main project also cross the turbulent rivers. Construction sites are often sparsely populated, without the convenience of transportation and mountains. Kara, the young computer room dedicated road traffic ditch hydropower station is located in the upper reaches of the right bank of the Yalong River. The construction area of Yalong is located on the left bank without any road leading to the construction area on the other side of the river. Before construction, there is no large-scale machinery and equipment, and the construction of large-scale water piers is difficult. We used the main span of the 60.96-meter Bailey steel bridge across the river, the bridge to shorten the construction time, as the main construction for a period of time. We summarize the construction technology of Bailey Bridge to form this construction method.

2. Features of construction method

2.1 Compared with the cable bridge, the Bailey bridge is safer and more stable to transport materials;

2.2 The bridge erection equipment only needs excavators, jacks, etc. No need for large lifting equipment, speed, easy operation and high efficiency;

2.3 The overall structure is simple, the construction is safe, and the construction period is short.

3. Scope of application

This construction method is suitable for crossing rivers, rivers, valleys and other locations, especially the construction period of the project, the transportation of bulk materials, and the construction difficulties of piers in water.

4 Process principle

The upper steel bridge is erected by the "cantilever push method". The so-called "cantilever push method" is to install rock and roll on both sides of the river first. The bridge unfolds smoothly and slowly, directly across the rock that occurs afterward.

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