| 摘要 |
The subject matter of the invention is a combined bridge structure consisting of an expandable, stiffenable and collapsible bearer frame and actuators that move the latter, including the supplementary subassemblies and bridge deck, wherein the bearer frame comprises scissor-like paired rods (1) joined at the centre of their longitudinal axis allowing the swivel motion of rods, at least part of which have bore-holes (2) at each end for enmeshing hinge-pins forming part of pins bent at a definite angle (3) and hinges (4) constituting jointly interconnecting pieces (E), and the paired rods arranged in sequence to form at least three rows are joined by means of interconnecting pieces to form a stiff frame under the angle of plane of the paired rods. Actuator (5) responsible for expansion / contraction and actuator (6) responsible for tilting, swivels (7) joining the two bottom corners of one end of the frame, roller bed (12) joining some bottom middle nodes of the frame and other supplementary subassemblies jointly allow the controlled motion of the bridge structure, whereas bridge deck (8) allowing passage is capable of moving together with the latter. The structure is installed on the platform of truck (9) equipped with outriggers (11) and licensed for road transport. Typically the bridge is slightly vaulted. By means of wire ropes (15) and other well-known supplementary subassemblies the frame can be reinforced to allow even tuggage inside the structure. The rapid deployment structure forming the subject of the invention can be taken into account in emergency recovery and disaster control tasks requiring high level of mobility such as at the time of flooding. |
