Freeze-thaw cycle roadbed disposal method and structure

Abstract

The invention discloses a freeze-thaw cycle roadbed treatment method, which belongs to the technical field of road construction, and comprises three parts, namely water blocking and water insulation, water drainage and deformation compensation, and the water blocking and water insulation are used for blocking surface water from entering a roadbed and isolating a connection channel between underground water outside the roadbed and the roadbed; the drainage is to collect underground water in the ground layer within the roadbed range and discharge the collected underground water out of the roadbed; according to deformation compensation, a cushion layer with the deformation characteristic opposite to that of the pavement base layer is used for counteracting the influence of deformation of the pavement base layer on the pavement. The invention further provides a freeze-thaw cycle roadbed structure, the water insulation assembly can block the connection between the pavement base layer and external formation water, water supply in the pavement base layer is reduced, and the increment problem is solved; the drainage assembly can reduce the content of underground water in the pavement base layer and solve the storage problem; the compensation cushion layer can correct the influence of the residual underground water, and plays a role in counteracting the deformation acting force of the pavement base layer. The invention has obvious effect and is suitable for wide popularization.

Description

technical field [0001] The invention relates to the technical field of road construction, in particular to a freeze-thaw cycle roadbed treatment method and structure. Background technique [0002] The treatment of roadbed in freeze-thaw areas is a worldwide problem. After the roadbed is frozen at low temperature, the water in the roadbed will expand when it becomes ice, and the volume of ice will shrink when it is melted at high temperature. This freeze-thaw cycle will lead to the cyclic expansion and contraction deformation of the subgrade, which will have an adverse effect on the road, resulting in cracking and deformation of the road. [0003] Existing disposal schemes include freezing method, heat preservation method, leaping method and so on. The freezing method is to use liquid nitrogen to freeze, so that the roadbed is always in a frozen state, so as to ensure that it does not melt. The thermal insulation method is to insulate the subgrade to keep it in a frozen sta...

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Problems solved by technology

[0004] In view of the above-mentioned defects, the technical problem to be solved by the present invention is to provide a freeze-thaw cycle embankment disposal method and structure to solve the problems existing in the current technology that the cost is too high or the energy consumption is too high, and the cost is large, which is not conducive to large-scale promotion and long-term Use; the problem of poor roadbed treatment effect

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