Reinforcing method of arch bridges

Abstract

The invention discloses a reinforcing method of arch bridges. The method comprises following steps: prefabricating multiple concrete precast blocks with preformed holes in the middle according to thecurve of a lower edge of an original arch bridge; digging anchoring ends for fixing prestressed steel strands on arch supports at two ends of the original arch bridge; fixing one end of the prestressed steel strand on an arch support at one side through the anchoring end according to calculated stress; the prestressed steel strands passing through the preformed holes in the concrete precast blocks; the concrete precast blocks are bonded to a lower edge of the original arch bridge with cement mortar; repeating the steps in the length direction of the arch bridge; cement mortar is smeared between adjacent two concrete precast blocks away from the preformed holes; fixing the prestressed steel strands on the arch support through the anchoring end until the prestressed steel strands pass through the last piece of concrete precast block; then pasting a final concrete precast block; repeating the above steps until the whole bridge bottom is paved. The invention has no influence on the upper traffic, small investment, convenient and quick construction, and can significantly improve the load-bearing capacity of the structure.

Description

technical field [0001] The invention relates to a bridge reinforcement technology, in particular to an arch bridge reinforcement method. Background technique [0002] Arch bridge is the most common type of bridge in my country. It has the largest number of styles and is the crown of all bridge types. Especially road bridges, according to incomplete statistics, 7% of road bridges in my country are arch bridges. Especially the reinforced concrete arch bridge has the most styles in the world. With the continuous development of our country's social economy, the road traffic volume is increasing. Many bridges built in our country in the last century due to the increase in service life and increasing bridge load, many bridges have been damaged, the reinforced concrete structure is aging, the integrity is poor, and the bearing capacity is reduced, which poses a serious threat to driving safety and needs to be reinforced. reinforcement. At present, the commonly used arch bridge ...

AI Technical Summary

Problems solved by technology

However, the above method has problems such as affecting the upper traffic, large investment, and complicated construction.

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