A clamping and strengthening method for prefabricated concrete hole hollow slab bridges

Abstract

The invention relates to a clamping and strengthening method for a prefabricated concrete hole hollow slab bridge, which comprises the following steps: step 1, measuring the span x of the hollow slab bridge; selecting a steel beam with a suitable cross-section, the steel beam is made of I-shaped steel, First determine the shear stiffness of the steel beam according to the shear stiffness curve formula of the steel beam; step 2, place the steel beam on the lower surface of the hollow slab girder forming the hollow slab bridge, and the two adjacent hollow slab girders are hinged joints. The anti-tension screw is pierced in the seam, and the lower end of the anti-tension screw is fixedly connected with the steel beam, and the upper end of the anti-tension screw is connected with an upper steel plate; step 3, pouring the fixing material in the hinge joint at the position where the anti-tension screw is set, and A connecting device is fixedly arranged at the end of the steel beam, and the connecting device is used for fixedly connecting the upper steel plate and the steel beam. The invention has the effect of improving the reinforcing performance of the steel beam to the hollow plate beam.

Description

technical field [0001] The invention relates to the technical field of reinforcement of a prefabricated slab bridge, in particular to a clamping and reinforcing method of a prefabricated hollow slab bridge with concrete holes. Background technique [0002] The prefabricated slab bridge connects the hollow slabs horizontally as a whole by casting concrete hinges or welding steel plates between the slabs. It is widely used because of its light weight, convenient construction, good structural performance, and centralized production. With the development of society, more and more vehicles are passing on the road, and the frequency of overweight vehicles is getting higher and higher. Most of the hinge joints of hollow slab bridges are damaged to varying degrees, and longitudinal cracks are generated along the hinge joints of hollow slab bridges. , part or even all of the hinged concrete peels off. When the vehicle load passes on the bridge, the load on the bridge slab is too lar...

AI Technical Summary

Problems solved by technology

[0004] However, in the above structure, the connecting rods are pre-buried in the hinge joints. After long-term use, the filling medium in the hinge joints is damaged, which reduces the reinforcement performance of the steel beams on the hollow slab beams.

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