The Role Of Bailey Steel Bridge in Construction

In the actual construction process of the project, there are often some emergencies, such as the bridge is destroyed by flood, which requires rapid repair to ensure that the cross-straits traffic is not blocked, and the Bell steel bridge is a better choice. In the construction of the Qinghai-Tibet railway road construction, the use of the Bailey steel bridge for quick repair, only 4 days will be successfully set up 2 bridge, to ensure the smooth passage of the leadership of the ministry on time, now the site application of this bridge to do some introduction.

The prefabricated Bailey steel bridge is a semi-penetrating bridge. The main beam is made of each 3m long truss connected with pins, and the two main beams are connected with beams. Two beams are arranged on the lower chord rod of each truss. The bridge panel is placed on the beam, and the bridge panel is connected with the beam with pins. Each truss is cross-connected with two oblique tie rods to control the distance between the left and right trusses and increase the transverse stiffness. In order to increase the strength of the bridge, the main beam can be arranged in parallel rows or double pipes, or reinforcing string rods can be added to the upper and lower string rods of the truss. If the span is within 30m, the latter can meet the requirements. The upper distance of the inner row trusses on both sides of the bridge is 4.2m, and the clear width of the bridge deck is 3.7m. Only one car is allowed to pass at a time and the speed limit is 5Km. Bailey steel bridge is characterized by light parts, the parts with bell pin or bolt connection, convenient assembly and disassembly, with simple tools and manpower can be quickly built for water damage emergency repair.