A method for reinforcing a double-curved arch bridge with a corrugated arch plate

Abstract

A method for reinforcing a double-curved arch bridge with a corrugated arch plate comprises pouring a main arch ring arch rib reinforcement layer on the outside of the main arch ring supply rib, pouring a main arch plate reinforcement layer on that main arch ring arch plate, the main arch plate reinforcement layer and an arch plate groove area forming a cavity. Compared with the reinforcement method of directly filling the groove area on the arch plate in the prior art, the invention increases the bending moment of inertia of the section, at the same time, the material consumption is small, which is favorable for the stress of the structure before the newly poured concrete reaches the strength standard value. The invention does not change the characteristics of the double-curved arch bridge, and retains the historical style and features of the bridge. The invention also replaces the original filler with the lightweight filler, lightens the dead weight of the structure, reduces the stress level under the action of the original structure under the dead load, makes the load shared by the reinforcement layer larger, and gives full play to the bearing capacity of the reinforcement layer.

Description

technical field [0001] The invention relates to the field of bridge reinforcement, in particular to a method for reinforcing a double-curved arch bridge with corrugated arch plates. Background technique [0002] The double-curved arch bridge was widely used in the 1960s and 1970s because it fully utilized the advantages of prefabrication and was suitable for construction without supports and large-scale lifting equipment. However, with the increase in service life and poor structural integrity, many double-curvature arch bridges have serious cracks, which affect their bearing capacity and pose potential safety hazards. Therefore, the completed double-curvature arch bridges have been reinforced and reconstructed. Significant. [0003] The main arch ring of a double-curved arch bridge is generally multi-ribbed and multi-wave, mainly composed of arch ribs, arch waves, arch plates and transverse connections, among which the arch plates are divided into filling arch plates and c...

AI Technical Summary

Problems solved by technology

In the prior art, the reinforcement method for double-curved arch bridges with corrugated arch slabs is to fill the grooves between the corrugated arch slabs with concrete, and then transform them into filled arch slabs. However, the added concrete in the reinforcement process will increase the load of the original bridge body, and before the newly added concrete has solidified to a certain strength, it will have an adverse effect on the force of the original bridge body structure; The area surrounded by ribs and arch waves is filled with concrete, and it is directly transformed into a slab arch. Although the bearing capacity is improved, the increased load is large, and there is also the problem that the structure is unfavorable to the force before the reinforcement layer reaches a certain strength, and the main The cross-section of the arch ring has become the form of a slab arch, which is a pity for the commemorative double-curved arch bridge with corrugated arches.

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