Method for reinforcing culvert through inflatable internal mold and self-compacting concrete

Abstract

The invention discloses a method for reinforcing a culvert through an inflatable internal mold and self-compacting concrete. The method comprises the following steps: firstly, positioning devices are mounted; secondly, the inflatable internal mold is mounted; thirdly, an annular cavity is blocked; fourthly, the self-compacting concrete is poured into the annular cavity to form a concrete strengthening layer; and fifthly, the inflatable internal mold is dismounted. A rubber air bag is adopted in the method for reinforcing the culvert for serving as the inflatable internal mold, the self-compacting concrete is poured into the position between the inflatable internal mold and an existing culvert, and the concrete strengthening layer formed by the self-compacting concrete which has certain bearing capacity and is uniform and dense serves as a reinforcing body of the existing culvert; the concrete strengthening layer and a culvert structure jointly bear load action and carry out cooperative work; and the bearing force of the existing structure is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of culvert reinforcement, and in particular relates to a method for reinforcing a culvert by using an inflatable inner mold and self-compacting concrete. Background technique [0002] A culvert is a small structure that crosses and is buried in an embankment for flood discharge, irrigation or as a channel. In highway engineering, the number of culvert projects is large, accounting for more than 50% of the total number of highway bridges and culverts. According to statistics, in plain areas, there are 3 to 5 culverts per kilometer; in mountainous and hilly areas, there are an average of 6 to 8 culverts per kilometer. Among them, slab culvert and arch culvert are common culvert structure types. [0003] With the increase of the service life of the culvert, due to the environment, load, and foundation deformation, some reinforced concrete cover culverts have culvert fractures, concrete spalling, pitting, rein...

AI Technical Summary

Problems solved by technology

The clearance or clear span of most highway culverts is about 1.5m. For these culverts with small clearance, the above-mentioned measures such as increasing the structural section size or setting support members in the culvert are used for reinforcement. Due to the limited space in the culvert, the construction work is difficult. Larger, more difficult to set up and remove the formwork

Due to the thin thickness of the concrete reinforcement layer, it is difficult to achieve the expected dense state when pouring ordinary concrete in the formwork

However, if the plan of excavating the subgrade and pavement to replace or reinforce the damaged components is adopted, the normal passage of the road may be affected for the heavy traffic section, and temporary access roads need to be built sometimes; The culvert top and culvert side roadbed are more difficult to construct

Therefore, for these working conditions, technical measures can only be taken in the culvert to repair and strengthen the culvert

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