Composite foundation reinforced arch box retaining wall structure and construction method

Abstract

The invention relates to the technical field of retaining wall projects, in particular to a composite foundation reinforced arch box retaining wall structure and a construction method. The composite foundation reinforced arch box retaining wall structure comprises a composite foundation, an arch box retaining wall, a geogrid and a filling body, wherein the composite foundation is positioned belowthe ground and comprises a plurality of vibration crushed stone piles, the arch box retaining wall is positioned on the composite foundation, the filling body is arranged on the right side of a rear arch wall of the arch box retaining wall, and the geogrid is horizontally arranged in the filling body. A spongy soil foundation and a deep overburden foundation are reinforced by a vibro-replacement method, a wall body is provided with an arch box reinforced concrete structure, the geogrid is added into the filling body on the rear side of the retaining wall and connected with the rear arch wall,integrity and deformation resistance of the retaining wall and reinforcement can be improved, and the applicable wall height of the arch box retaining wall can be increased, so that project requirements are met.

Description

technical field [0001] The invention relates to the technical field of retaining wall engineering, in particular to a composite foundation reinforced arch box-type retaining wall structure and a construction method. Background technique [0002] During the filling process of revetment embankment, road subgrade, field and other projects, retaining walls are usually used to resist the filling pressure. The traditional empty box retaining wall structure consists of a base plate, a front wall, and a rear wall to form a cubic box structure. When the height of the retaining wall reaches more than 10 meters according to the project requirements, only relying on the retaining wall itself to resist the filling pressure will increase the wall thickness of the box body, increase the amount of steel bars and concrete, and require more bearing capacity for the foundation. High, the economic effect of the retaining wall is poor. [0003] When the above-mentioned engineering construction...

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Problems solved by technology

When the height of the retaining wall reaches more than 10 meters according to the project requirements, only relying on the retaining wall itself to resist the filling pressure will increase the wall thickness of the box body, increase the amount of steel bars and concrete, and require more bearing capacity for the foundation. High, the economic effect of the retaining wall is poor

[0003] When the above-mentioned engineering construction is located in coastal areas, river and lake shores, soft soil areas, and areas with deep overburden layers, since the stratum structure is mostly composed of silty sand, silt, silty clay, and silty soil, the bearing capacity of the foundation is relatively low. The wall and the filling body behind the wall are prone to large deformation and even instability and damage, so it is not suitable to directly build a high retaining wall on the foundation of loose soft soil and deep covering layer

The patents with publication numbers CN103321243B, CN103410167B, and CN104389320B respectively use steel pipe micro piles, cast-in-place piles, and pipe piles to reinforce the foundation of the retaining wall, but the above piles are all plain concrete or reinforced concrete structures, and the construction process is complicated and the construction period is long. , high project cost

[0004] When the above-mentioned poor geological conditions are encountered, the traditional empty box retaining wall structure cannot meet the stability requirements of itself and the filling body behind the wall, so the structure must be improved and combined with the retaining wall in other ways , the fill pressure behind the joint bearing wall

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