Compact 200 Bailey Bridge Located in Tongxiang Erection Completed

On January 4, 2020, tongxiang Compact 200 Bailey Bridge was completed.The bridge is 30.48 meters long, with a maximum single span of 30.48 meters, a load of 60 tons and a clear width of 4.2 meters.The design of the bridge adopts HD200 four-row single-layer type and adopts cantilever push-out method to complete erection.The technical difficulty of the bridge is that the multi-row truss is connected by widened support frame, which strictly controls the processing precision of the manufacturer.The successful erection of the bridge shows Great Wall's ingenuity.

The compact 200 prefabricated steel bridge is similar in appearance to the Compact 100 bridge, but the truss height is raised to 2.134 m.The tongxiang Berei bridge has a long span, so the staggered arrangement of the joints between the strings and the trusses is adopted to reduce the inelastic deformation caused by the gap between the pin holes, and the pre-arch method is adopted to greatly reduce the vertical deflection of the bridge span.The bolt connection member adopts the method of guide sleeve positioning and fixing to increase the product connection accuracy, guide sleeve shear, bolt tension, improve the service life of bolts, ensure the safety of steel bridge assembly.The wind - resistant tie rod is made into a whole and connected with the beam to improve the overall stability of the prefabricated steel bridge. Between the horizontal support frame and the truss piece is a span fixed, so as to ensure that the whole bridge has no side bending, and the whole bridge with pre-camber.

The bridge has a single carriageway, and the deck can be assembled into a double carriageway, extending the bridge's use. It is suitable for the load design of automobile -10, automobile -20, HS, HL93, track -50 and so on to meet the different needs of customers.