Seasonally frozen soil area roadbed anti-freezing structure and construction method thereof

Abstract

The invention relates to a seasonally frozen soil area roadbed anti-freezing structure and a construction method thereof, and belongs to the technical field of seasonally frozen soil area roadbed anti-freezing. The overall longitudinal section of the roadbed structure is trapezoidal, the roadbed structure sequentially comprises a roadbed, a gravel layer, a packing layer, a cement stabilized macadam layer, a conductive base layer and a pavement layer from bottom to top, and the roadbed structure further comprises a roadbed anti-freezing structure heating control system and a power supply system; and the gravel layer can prevent underground water in cold seasons from migrating to the upper part of the roadbed structure. Some industrial waste can be mixed into the conductive base layer to beturned into wealth, the electric heating effect is achieved, freezing of the roadbed structure is prevented, freezing of the roadbed structure side slope can be prevented through the hard heat preservation plate and the gravel slope protection layer of the side slope, water in the roadbed can be drained through an one-way drainage pipe, and freezing of the roadbed structure is prevented. Accordingto the seasonally frozen soil area roadbed anti-freezing structure and the construction method thereof, active defense, passive heat preservation and waterproof and drainage principles are comprehensively adopted, frost heaving of the roadbed in the seasonally frozen soil area can be effectively prevented, and the freeze-thaw resistance stability of the roadbed structure is improved.

Description

technical field [0001] The invention relates to the technical field of highway roadbeds in seasonally frozen soil regions, in particular to an antifreeze structure and construction method for roadbeds in seasonally frozen soil regions. Background technique [0002] The freezing damage of subgrade in seasonally frozen soil areas has always been an important problem that plagues road construction and safe operation in northern my country. Frost heave phenomenon of subgrade in seasonally frozen soil area is common, and the distribution of frost heave along the line has great randomness. Subgrade filling type, soil water content, permeability characteristics, drainage conditions, groundwater level, temperature, etc. will all affect subgrade frost heave. In the cold season, under the action of temperature gradient, water will migrate to the upper roadbed of the subgrade, and this vertical migration will cause a strong frost heaving effect on the subgrade structure. At the same ...

AI Technical Summary

Problems solved by technology

The replacement and improvement of foundation soil will significantly increase the investment of the project, which will pollute the soil environment along the line. At the same time, the replacement and improvement of foundation soil cannot effectively block the migration channel of water in the cold season

The insulation board method can prevent the intrusion of cold energy in cold seasons and slow down the freezing degree of the roadbed structure, etc., but when the ambient temperature continues to drop, the insulation board cannot effectively prevent the freezing of the roadbed structure

In addition, the deterioration of the strength of the insulation board over time will affect the thermal stability of the subgrade structure

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