A construction method of composite retaining structure

Abstract

The invention discloses a construction method of a combined supporting and retaining structure, and relates to the technical field of civil construction. The method includes the steps of surveying and setting-out, mountain slope treatment, manufacturing of prefabricated reinforced concrete breast boards, foundation surface cleaning and replacement filling, construction of a cast-in-place concrete foundation, construction of a cantilever type structure, construction of pre-stressed anchor cables, masonry installation of the prefabricated reinforced concrete breast boards, and construction of a wrapped face reinforced soil structure and a covering layer. By using the vertical pre-stressed anchor cables, the workload can be reduced, the construction period can be shortened, the anti-overturning capacity and anti-slippage capacity of the combined supporting and retaining structure can be improved, and the overall stability and anti-lateral-deformation capacity of the whole combined supporting and retaining structure can be improved; by adopting the prefabricated reinforced concrete breast boards, the construction progress can be accelerated, and the project quality can be ensured; by using the wrapped face reinforced soil structure, the strength and integrity of a filling part can be improved, and the lateral soil pressure on the panel of the supporting and retaining structure can be reduced. By means of the method, the overall stability is improved, occupation of land is reduced, construction is simplified, and the construction cost is reduced; the method is especially suitable for roadbed construction in mountainous and hilly regions.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a construction method of a composite retaining structure. Background technique [0002] In civil engineering, retaining structures refer to artificial structures used to support and reinforce soil or mountain slopes to prevent landslides and ensure stability. Currently commonly used lightweight retaining structures include reinforced soil retaining walls, cantilever retaining walls, buttress retaining walls, etc.: the above retaining structures are all retaining structures located on the surface of rock and soil, and their foundations are relatively shallow and cannot For landslides and other unfavorable geological conditions, support and reinforcement should be realized; and their respective heights are limited, such as the height of the reinforced earth retaining wall should not exceed 10m, and the height of the cantilever retaining wall should not exceed 6m. In the ...

AI Technical Summary

Problems solved by technology

Currently commonly used lightweight retaining structures include reinforced soil retaining walls, cantilever retaining walls, buttress retaining walls, etc.: the above retaining structures are all retaining structures located on the surface of rock and soil, and their foundations are relatively shallow and cannot For landslides and other adverse geological conditions, support and reinforcement are realized; and their respective heights are limited, such as the height of reinforced earth retaining walls should not exceed 10m, and the height of cantilever retaining walls should not exceed 6m, etc.

In the reinforced earth retaining wall, the reinforced material needs to have a certain laying length to play its role. In mountainous and hilly areas, due to the narrow and limited site, the required laying length cannot be achieved, and the reinforced earth retaining wall has a large deformation. major issues

In the subgrade engineering in mountainous and hilly areas, it is difficult for the above-mentioned supporting structure to realize its supporting function due to the narrowness of the site in mountainous and hilly areas.

Pile-slab retaining walls need to be excavated to a considerable depth to install the anti-slide piles in a stable ground, which not only requires a large amount of excavation and concrete pouring, but also requires a long construction time, and the installation and excavation of anti-slide piles will cause The problem of reduced stability of existing slopes

[0003] The above-mentioned retaining structures are currently controlled by their stability after being stressed, and cannot meet the current use requirements for high-speed railways and expressway roadbeds that have strict deformation requirements.

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