Anti-freezing water-resisting layer and roadbed

Abstract

The application provides an anti-freezing water-resisting layer and a roadbed. The anti-freezing water-resisting layer is arranged at the bottom of the roadbed, and comprises at least one layer of anti-seepage film and non-woven geotextile, wherein the anti-seepage film is used for blocking the migration of water in frozen earth to the roadbed direction; and the non-woven geotextile is arranged ontwo side surfaces of the anti-seepage film and used for coating the anti-seepage film, so that the anti-seepage film can be isolated from a roadbed filler or the frozen earth and protected against relatively large deformation caused by load. The anti-freezing water-resisting layer provided by the invention is arranged at the bottom of the roadbed, and serves as a partition between the roadbed andthe frozen earth in a plateau seasonally-frozen zone; and due to the own anti-seepage function of the anti-freezing water-resisting layer, the migration of the water in the frozen earth to the roadbed can be blocked, the water content of the roadbed fill in the roadbed can be stabilized, and the roadbed frost-heaving or frost-boiling caused by the roadbed fill in a freezing and thawing environment can be avoided.

Description

technical field [0001] The application relates to the technical field of roadbed structures, in particular to an antifreeze water-proof layer and a roadbed. Background technique [0002] The subgrade is the foundation of the road surface and is a geotechnical structure formed after excavation or filling. The subgrade can provide the necessary conditions for pavement laying and vehicle operation, and bear the load of the road surface and vehicles or the road surface and traffic, and at the same time transmit and spread the traffic load to the depth of the subgrade. [0003] At present, subgrades are usually constructed by means of low-fill and shallow excavation such as digging and rolling, excavation and replacement, and adding gravel blind ditches to form low-fill and shallow-cut subgrades. The subgrade filler in the low-fill and shallow-cut subgrade is of good quality, which can increase the bearing capacity of the subgrade and curb the adverse effects of groundwater on t...

AI Technical Summary

Problems solved by technology

[0005] This application provides an antifreeze water-repellent layer and roadbed to solve the problem of frost heaving and muddying of the roadbed caused by the high water content of the roadbed

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