Implementation Steps Of The Construction Of Bailey Frame Suspension

The Bailey piece is a shaped truss welded by 10# channel steel. The size of each piece is 3m×1.5m. There are male and female connecting heads at both ends, which are connected by connecting pins during assembly. In order to strengthen the stiffness of the joint, the joint is strengthened with a connecting piece, the size of the connecting piece is 0.5m×1.0m, and there are bolt holes on the Beret piece and the connecting piece, which are connected and fixed with bolts during assembly. According to the stress needs, it can be assembled into a single row of single layer, double row of single layer, single row of double layer, double row of double layer and other forms. The upper and lower chord bars of the truss pieces can be reinforced by another chord bar to meet the needs of various loads.

During the construction, serpentine columns (1.5m high column, 0.55m higher than the bridge) were embedded on the pier columns, and steel plates were welded to install I-steel on the serpentine columns, and then Bailey truss was built on the I-steel. Three serpentine columns were embedded on each pier column. The Bailey frame adopts a double-row single-layer structure (four rows of Beret truss), in which the spacing between the first row and the second row is 50cm; 3m between the second row and the third row; The spacing between the third and fourth rows is 50cm.

After that, the suspension bars are welded on the Bailey sheet, and the safety platform is formed on the lower part. 78 suspension bars are actually used for each span. In order to prevent the deformation of the middle part of the force from shifting, welding tendons at both ends of the Bailey frame are connected to the abutment column inserted ribs, and the Bailey frame and Bailey frame are strengthened by scissors support connection.