Bailey main beam combination type

When designing the combination of Bailey main beams, it is necessary to consider factors such as the spatial span of the structure, the lifting stability of the Bailey main beam, the on-site lifting capacity, and the on-site operation period. As the overhead Bailey truss support system requires high-altitude operations, the design should minimize the difficulty and quantity of high-altitude operations, and strive to complete most of the operations on the ground.

The choice of overhead Bailey truss support system is a difficult problem in the design stage. The elevated Bailey support structure requires overhead operations and is higher from the ground. 

For example, the elevated Bailey support structure of the Three Gorges ship lift exceeds 120 m from the ground. The design of the overhead Bailey truss support system needs to consider factors such as the convenience of erection operations, the scientific nature of structural forces, and the economic efficiency of construction costs. Commonly used Bailey truss supports

There are 4 types of bracing system schemes: Bailey main beam structure system (plan A), Bailey column and Bailey main beam structure system (plan B), structure and Bailey main beam structure system (plan C), Bailey column and Corbel structure and Bailey main beam structure system (Scheme D). The four schemes are all assembled on the ground, hoisted in groups, and connected horizontally in the air.