Spring-propped bridge reinforcing structure

Abstract

The invention relates to a spring-propped bridge reinforcing structure. In the structure, an intact pillar is fixed on a middle cushion cap and supports the slab cross beam of an irregular bridge slab by a support; the structure is characterized in that at least one unit spring-propped reinforcing structure is arranged at the periphery of the intact pillar and comprises two symmetrical pier columns, an n-shaped steel bent cap and two symmetrical dynamometry-adjustable supports; the lower bottom slabs of the two symmetrical pier columns are in threaded connection with the middle cushion cap, the n-shaped steel bent cap is of a symmetrical n-shaped structure and is symmetrically and fixedly arranged at the tops of the two symmetrical pier columns, and the two ends of the upper part of the n-shaped steel bent cap are supported at the lower part of the slab cross beam by the two symmetrical dynamometry-adjustable supports. The structure is used for reinforcement under the condition that key parts of the irregular slab crack seriously and have insufficient bearing force; a loaded reinforcing method is implemented, construction process is simple, and complicated prestress steel bundle construction process and the anchoring structure are avoided, and a good reinforcement effect is achieved.

Description

technical field [0001] The invention belongs to the field of bridge reinforcement, and in particular relates to a bridge structure reinforced by a spring support top. Background technique [0002] The existing bridge reinforcement technology is mainly divided into two categories, one is to change the structural system, such as reducing the span of the beam, simply supporting the beam to a continuous beam structure, in order to reduce the burden on the original beam; the other is to increase the cross-section Size and reinforced structure reinforcement, etc., most of the current reinforcement technologies use reinforcement measures such as pasting carbon fiber and steel plates in the tension area. These reinforcement methods belong to the category of passive reinforcement in principle. The self-weight and dead load of the component are borne by the original beam, and the live load is borne by the reinforced composite section. The strength of the reinforced material is limited...

AI Technical Summary

Problems solved by technology

For the reinforcement of bridges that cannot interrupt traffic, the prestressed construction process under the bridge is complicated, and anchorage measures are installed on the damaged bridge to cause further damage to the bridge to be strengthened

Due to the complex loss of prestressed steel tendons, after the reinforcement is completed, the effective prestressing effect is difficult to monitor. Most of them are obtained by theoretical analysis and calculation. There is a certain deviation from the actual situation, which makes it difficult for the management and maintenance units to grasp the stress state of the reinforced bridge. Wait

During the reinforcement construction, measures to interrupt or restrict traffic, or to further increase the prestress effect, etc. are often used, which brings a lot of inconvenience to the project.

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