Heightening and strengthening structure and method for in-service steel bar concrete retaining wall

Abstract

The invention provides a heightening and strengthening structure and method for an in-service steel bar concrete retaining wall. The structure comprises the in-service steel bar concrete retaining wall, a strengthening vertical plate is arranged on the upper portion of the in-service steel bar concrete retaining wall, and the in-service steel bar concrete retaining wall is connected with the strengthening vertical plate through embedded steel bars; a horizontal pressure reduction unloading flat plate is arranged on the bottom of the strengthening vertical plate, the horizontal pressure reduction unloading flat plate is located above the wall back of the in-service steel bar concrete retaining wall, and injection pipes or mini piles are arranged on the lower portion of the horizontal pressure reduction unloading flat plate; a kick plate is further arranged between the strengthening vertical plate and the horizontal pressure reduction unloading flat plate. The method comprises the steps of construction preparation, filling and strengthening of the wall back of the in-service steel bar concrete retaining wall, digging of a base groove, construction of the horizontal pressure reduction unloading flat plate, construction of the embedded steel bars, construction of the strengthening vertical plate and the kick plate and backfill of the wall back of the strengthening vertical plate. According to the heightening and strengthening structure and method for the in-service steel bar concrete retaining wall, the time and cost can be saved, and meanwhile the safety and stability of an in-service slide slope are guaranteed.

Description

technical field [0001] The invention belongs to the technology of heightening and strengthening retaining walls, and in particular relates to a structure and method for heightening and strengthening reinforced concrete retaining walls in service. Background technique [0002] my country is a country with undulating terrain and landforms. A large number of construction projects, especially highway and railway projects, are inevitably built in complex areas such as mountainous areas. Due to the complex strata in the above areas, large changes in geological conditions, and many dangerous rocks, etc. With the existence of many unfavorable factors, slope support engineering is particularly important. [0003] The retaining wall is a structure used to support roadbed fill or hillside soil and prevent the deformation and instability of fill or soil. Retaining walls can be used to stabilize embankments and cutting slopes, reduce the height of excavated slopes, reduce the amount of e...

AI Technical Summary

Problems solved by technology

[0004] As a long-term structure, the retaining wall may encounter cracks and bulges during its use, or it may encounter planning adjustments that lead to heightening of the wall, and even accidental collapse in very few places. The development, piled up soil, filled soil, etc. caused the height of the original slope to increase, making the original retaining wall no longer applicable, and the safety and stability could not meet the requirements, threatening the life and property safety of the country and the people

The traditional solution is generally to demolish and rebuild the original retaining wall, but this method requires a large amount of work, is expensive, labor-intensive and time-consuming, and is also accompanied by certain dangers. The original slope is prone to instability. Therefore, no matter from the perspective of engineering construction or the safety of people's lives and property, the research and development of heightening and strengthening technology for reinforced concrete retaining walls in service is very necessary.

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