Arch-type bridge pre-tensioned construction

Abstract

The arched bridge pre-stressed structure, its goal is new old arch rib between exerts the pre-stressed through the pre-stressed in the arched bridge, old arch rib plays to the arched bridge reduces negative and the reinforcement role, establishes old in the arched bridge arch rib under, old arch rib with is new arch rib between is equipped with the pre-stressed loader, on the pre-stressed loader screw rod has a part to insert in with in the new arch rib permanent connection steel pipe, revolves on the pre-stressed loader nut, causes the screw rod to rise long, goes against the backing strip, the nut presses the backing strip, also depends upon newly through the pre-stressed loader arch rib picks up old arch rib.

Description

technical field [0001] The present invention relates to bridges characterized by structures. Background technique [0002] At present, the main method of strengthening the arch bridge structure is to increase the cross-sectional area of ​​the arch rib. This method has a positive side to increase the bearing capacity of the original structure, but it also has the following shortcomings: [0003] 1. Increasing the cross-sectional area of ​​the arch rib is equivalent to increasing the load of the original arch bridge structure; [0004] 2. The old and new structures cannot work together in harmony. When the new structure is completed, it cannot bear the load immediately. Only when the old structure continues to deform under the load, the new structure can bear part of the load of the old structure and participate in the work. The prerequisite for the new structure to participate in the work is that the old structure continues to deform, and the continuous deformation of the o...

AI Technical Summary

Problems solved by technology

[0004] 2. Old and new structures cannot work together

The prerequisite for the new structure to participate in the work is that the old structure continues to deform, and the continued deformation of the old structure intensifies the danger of the structure

[0005] 3. In order to strengthen the connection between the old and new structures, the old structures will be damaged to some extent during construction;

[0006] 4. The construction is difficult;

[0007] 5. Block traffic during construction

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