Bridge head highway subgrade structure

Abstract

The invention discloses a bridge head highway subgrade structure which comprises a subgrade body, a composite protective cushion layer arranged in the subgrade body, a bearing surface layer arranged on the upper surface of the subgrade body and provided with curbstone bonding parts at the two ends, a stone cushion layer arranged under the composite protective cushion layer and provided with a stone wrapping protective layer on the outer surface, and a concrete cushion layer arranged between the bearing surface layer and the stone cushion layer; and a dense cushion layer is arranged on the surface of the lower end of the concrete cushion layer. The subgrade is good in bearing stability and not prone to being affected by the external environment temperature, so that the problems that the subgrade is prone to being damaged and needs to be maintained frequently are effectively solved, a good waterproof effect is achieved, and rainwater is prevented from leaking from the upper surface of asubgrade body to damp a bottom stone cushion layer; meanwhile, a heat insulation cushion layer has a good heat insulation protection effect, and the influence of the temperature difference between summer and winter on excessive thermal expansion and cold contraction of the subgrade body is prevented.

Description

technical field [0001] The invention relates to the technical field of roadbed structures, in particular to a bridgehead road roadbed structure. 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 investment. The subgrade is a str...

AI Technical Summary

Problems solved by technology

[0003] The existing subgrade structure of Qiaotou highway does not have good bearing stability, poor functionality, and is easily affected by the external environment and cause subgrade fission. Therefore, it is necessary to develop a new subgrade structure of Qiaotou highway

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