Curved bridge fitting laying structure based on orthogonal prefabricated beam plate and laying method thereof

Abstract

Provided is a curved bridge fitting laying structure based on orthogonal prefabricated beam plates and a laying method thereof. The fitting laying structure includes an upper portion beam plate system, a beam plate protection structure and a lower portion support structure. The upper portion beam plate system comprises a plurality of spans of the beam plates arranged in the curve chord tangent direction of the curve, and each of the beam plates is the same in size, and each of the beam plates comprises the orthogonal prefabricated beam plates arranged side by side. Plate seams of every span formed by each of the orthogonal prefabricated beam plate are trapezoidal staggered, and the plate seams are filled with wedge-shaped wood strips. The laying method includes the determination of a benchmark span, the laying of pier capping beams, cushion rock and support seats, the laying of middle beams and cantilever side beams, and the laying of the filling of the plate seams and shielding structures of the plate beams. The curved bridge fitting laying structure based on the orthogonal prefabricated beam plates and the laying method thereof are applicable to a curved bridge with assembly typeconstruction on an upper portion of the curved bridge, and prefabricated beam plates of each span of the curved bridge are the same in size, the plate seams between each span are regularly staggered,the laying method is reasonable and ingenious, and the calculation of the design of the beam plates is simplified, the construction quality of the prefabricated beams is ensured, and the assembly construction can shorten the construction period of the curved beam bridge.

Description

technical field [0001] The invention relates to the technical field of bridge structures, in particular to a curved bridge fitting layout structure and a layout method based on orthogonal prefabricated girder slabs. Background technique [0002] When the bridge site is located in the curved section of the road, considering the smooth and comfortable alignment of the entire road, in order to ensure that the route index meets the design service level, it is necessary to build a curved bridge consistent with the direction and curvature of the route. At present, designers usually adopt the method of casting curved girder bridges on site, or prefabricating and assembling special-shaped slabs to fit the inner and outer curves. The disadvantages of cast-in-place curved girder bridges are obvious: it is necessary to build a full house of supports, which consumes a lot of formwork and has a long construction period. For bridges with high piers in mountainous areas and municipal bridg...

AI Technical Summary

Problems solved by technology

The disadvantages of cast-in-place curved girder bridges are obvious: it is necessary to build a full house of supports, which consumes a lot of formwork and has a long construction period. For bridges with high piers in mountainous areas and municipal bridges with large traffic flow under the bridge, cast-in-place support has great limitations.

The prefabricated and assembled special-shaped slab method, although the construction period is shorter than that of cast-in-place beams, has obvious disadvantages: the slope of each span of prefabricated beams is different, especially the inner and outer side beams of the side spans are irregular special-shaped beams and slabs, and non-standard special-shaped prefabricated beams and slabs are affected. The complex force and structural design also increase the complexity of assembly construction, and at the same time affect the continuity of the bridge deck between spans, making the internal force distribution of the cross bridge to each girder slab more complicated

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