A separate highway subgrade and its construction method

Abstract

The invention discloses a separated highway subgrade and a construction method thereof, which belong to the technical field of road engineering, and include a first-phase project subgrade. The side orientation of the first-phase project is provided with a second-phase subgrade. The inside of the subgrade of the first-phase project is embedded with a joint device, and the top of the subgrade of the second-phase project and the top of the subgrade of the first-phase project are laid with a stable backing plate. In the present invention, through the designed combination device, the first waterproof layer, the second waterproof layer, the first buffer board, the second buffer board, high polymer clay, high molecular polymer, steel grid, geotextile layer, sand Under the mutual cooperation between the pavement layer, the permeable pavement layer and the drainage pipe, by laying waterproof, noise reduction and buffer structures, it can avoid the subgrade of the first phase project and the subgrade of the second phase project from being damaged to a high extent, and prevent the subgrade of the first phase project from being damaged. The subgrade and the subgrade of the second-phase project have settled and deformed, which improves the stability of the subgrade of the first-phase project and the subgrade of the second-phase project.

Description

technical field [0001] The invention belongs to the technical field of road engineering, and in particular relates to a separated road subgrade and a construction method thereof. Background technique [0002] The subgrade is the foundation of the track or road surface, and it is a geotechnical structure formed after excavation or filling. The main function of the subgrade is to provide the necessary conditions for the laying of the track or road surface and the operation of trains or trains, and to bear the static and dynamic loads of the track and rolling stock or the road surface and traffic loads, and at the same time transfer and spread the load to the depth of the foundation. On the longitudinal section, the roadbed must ensure the elevation required by the line; on the plane, the roadbed is connected with bridges and tunnels to form a complete and continuous line. In civil engineering, subgrade plays an important role in terms of construction quantity, floor area and ...

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Problems solved by technology

[0004] The purpose of the present invention is: in order to solve the problem of the existing separated roadbed, the slopes are placed separately, and the cross-section is two trapezoidal or inverted trapezoidal. Affected by the structure, water accumulation is easy to occur on the road surface, and gradually penetrates into the roadbed, and at the same time Vehicles in the process of driving will also exert a certain pressure on the road surface. Through the effect of force transmission, it is easy to cause subsidence or deformation of the subgrade, which seriously affects the service life of the subgrade and the structural integrity of the subgrade. A separate road subgrade is proposed and its construction method

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