Method for reinforcing arch bridge with EPS Expandable Polystyrene light concrete

Abstract

The invention relates to a method for reinforcing an arch bridge with EPS Expandable Polystyrene light concrete. The method comprises the following steps: a, chipping away pavement on the old deck of the arch bridge to be reinforced and filling materials on original arches; b, preforming scabbling treatment on naked back arch concrete; c, preparing the EPS light concrete and performing casting, vibrating and rolling compaction; and d, pouring a new deck reinforced concrete pavement layer. Through the adoption of the method for reinforcing the arch bridge, the following benefits can be obtained: 1, the dead weight of the upper structure of the arch bridge can be reduced obviously, and the EPS light concrete has higher strength and thus can enhance the integrity of the construction on the arches and improve the load diffusion effect of the deck; 2, arch axis coefficients are regulated and optimized, so as to effectively improve the load-carrying capacity of a double curvature arch bridge; and 3, the EPS light concrete is low in manufacturing cost and can be made from recycled waste polystyrene material, thereby having favorable economic and environmental benefits.

Description

technical field [0001] The invention relates to bridge reinforcement technology, in particular to a method for reinforcing an arch bridge with EPS lightweight concrete. Background technique [0002] EPS concrete is a kind of cement material that is mixed and stirred and solidified by cement, river sand, EPS particles, micro silica fume, water reducing agent and other materials in a certain proportion. EPS concrete is light and high-strength, with a bulk density of about 12kN / m3 and a compressive strength of about 1.7MPa. It has good energy absorption and water resistance, and no shrinkage cracks will occur during large-area pouring. [0003] It is made by replacing all or part of the sand and gravel in ordinary concrete with recycled or original EPS particles, and adding admixtures. It has low density, good water resistance, and strong energy absorption. It is a kind of high economic and social benefits. New Building Materials. There are a large number of existing arch bri...

AI Technical Summary

Problems solved by technology

There are a large number of existing arch bridges in my country, and conventional arch bridges have high packing density and low strength. It is difficult to ensure the integrity under the action of vehicle loads, which will lead to bridge deck pavement cracking and damage, side wall bulging and other diseases, which will affect the structural stress.

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