Method for enabling overweight vehicle to pass continuous beam bridge

Abstract

The invention relates to a method for allowing an overweight vehicle to pass a continuous beam bridge. The method includes the steps that a, before the overweight vehicle passes the bridge, traffic isinterrupted, steel bearing beams are laid on the continuous beam bridge, and bridge passing steel boxes are erected on the steel bearing beams; b, multiple auxiliary steel boxes are laid on the bridge passing steel boxes, and rubber cushion blocks are placed between the bridge passing steel boxes and the auxiliary steel boxes; c, two steel oblique cushion blocks are obliquely erected at the two ends of each auxiliary steel box, and the bridge passing steel boxes, the auxiliary steel boxes and the steel oblique cushion blocks form two paths for wheels of the overweight vehicle to pass; d, whenthe overweight vehicle passes the bridge, the auxiliary steel boxes transmit the load of the overweight vehicle to the bridge passing steel boxes, the load is then transmitted to a main beam of the continuous beam bridge through the steel bearing beams, and therefore the largest bending moment generated by the overweight vehicle on the continuous beam bridge is reduced; and e, after the overweight vehicle passes the bridge, the steel oblique cushion blocks, the auxiliary steel boxes, the rubber cushion blocks, the bridge passing steel boxes and the steel bearing beams are detached, and traffic is recovered. The largest bending moment generated by the overweight vehicle in a span of the continuous beam bridge can be reduced, cost is low, and construction is convenient. The invention relates to the technical field of bridge engineering.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a method for overweight vehicles passing a continuous girder bridge. Background technique [0002] With the development of economy and transportation, some overweight vehicles have the demand to pass through continuous girder bridges. However, due to the heavy load of overweight vehicles, the ultimate bending capacity of the main girder of continuous girder bridges is difficult to pass through. Passage is only allowed after the ultimate bending capacity is reached. In view of the above problems, the reinforcement method that can be used for reference at present, as disclosed in the patent CN104652293A: a cable-stayed bridge structure and construction method for strengthening PSC continuous girder bridge, is to reduce the internal stress of the main girder by changing the continuous girder bridge structure system , improve the bearing capacity, change the continuous g...

AI Technical Summary

Problems solved by technology

[0003] (1) Due to the complex structure, many times of assembly and welding are required, resulting in relatively poor structural reliability, and the structure is all composed of steel structures, with poor durability and high construction technology requirements

[0004] (2) It is necessary to adjust the force of the cables many times, and the design and construction technology requirements are high

[0005] (3) This reinforcement method directly anchors the composite steel on the web vertical prestressed tendon of the continuous girder bridge, which will cause the vertical prestressed tendon to generate excessive compressive stress locally on the web of the continuous girder bridge. produce adverse effects, causing local damage

[0006] (4) The construction procedures are cumbersome, the construction period is long, and the traffic needs to be closed for a long time for construction

[0007] (5) The overweight vehicle crossing the bridge is a temporary behavior, while the reinforced structure of this invention is a permanent structure, which loses its use value after the overweight vehicle crosses the bridge, resulting in great economic waste

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