Novel reinforcing method of fabricated masonry arch body

Abstract

The invention discloses a novel reinforcing method of a fabricated masonry arch body. The novel reinforcing method comprises the following steps: a, concrete arch blocks are prefabricated; b, the concrete arch blocks are linearly arrayed and flatly laid to be orderly so as to form an arch block linear array; c, an FRP cloth is flatly laid on the upper surface of the arch block linear array to obtain the flexible arch body; d, a mortar protective layer is poured; e, left and right side permanent supports are poured; f, left and right side temporary supports are fixedly placed; g, left and rightside jacks are mounted; h, hoisting is prepared; i, the flexible arch body is hoisted, and arch rings are formed; j, lifting eye bolts are dismantled; k, the arch rings are pushed in place; l, the left and right side jacks are reset; m, the step h to the step l are repeated to complete subsequent arch ring mounting operation till all the needed arch rings are mounted below a bridge floor of an original bridge; and n, the left and right side temporary supports are dismantled. According to the reinforcing method, an original bridge structure can be effectively machined, the construction processis convenient and quick, and durability is good.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a method for reinforcing a novel assembled masonry arch. Background technique [0002] The use of arch bridge structures in our country has a long history, and arch bridge structures have good load-bearing performance and durability. Since the 1990s, the state has invested heavily in high-grade highways, which has made my country's bridge industry develop unprecedentedly; with the continuous development and progress of the economy and society, the number of automobiles in my country has also continued to increase. With the continuous increase in the number of vehicles and the vehicle load Larger and larger, for some concrete girder bridges it is likely to exceed the original vehicular specifications met. [0003] In addition, the corrosion of steel reinforcement due to environmental factors will also lead to the degradation of concrete performance, which will accelerate...

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Problems solved by technology

[0003] In addition, the corrosion of steel reinforcement due to environmental factors will also lead to the degradation of concrete performance, which will accelerate the performance degradation of the bridge structure, reduce the bearing capacity, reduce the service life of the structure, and affect the normal use. The specific performance is as follows:

[0004] 1. In simply supported girder bridges, steel bar deformation and corrosion are irreversible damages;

[0005] 2. Under the heavy vehicle load of the concrete beam bridge structure, the cracking of the concrete will cause the corrosion damage of the steel bar, thereby reducing the performance of the structure;

[0006] 3. The collapse of the bridge is a brittle failure, and once it is damaged, the consequences will be serious

[0007] Based on the above situation, it can be seen that some bridges are more prone to decline in durability, strength and other mechanical properties caused by corrosion of steel bars after a short service life, resulting in a sharp increase in maintenance difficulty, greatly shortening the bridge inspection and evaluation cycle, and costing a lot Human and material resources, what's more, it will lose the traffic carrying capacity, resulting in safety accidents, which is not conducive to the development and progress of society in the long run

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