High intensity freezing damage prevention waterproof cushion layer

Abstract

The invention belongs to freezing damage prevention facilities of road and railway subgrounds and particularly relates to a high intensity freezing damage prevention waterproof cushion layer. Epoxy resin and curing agent (4) are adhered to high intensity fiber materials (2 and 5) on both surfaces of a composite geomembrane (3) to form a freezing damage prevention waterproof cushion layer, the waterproof cushion layer is made in a groove shape, both sides of the groove are external inclined planes, the bottom of the groove is horizontal, the bottom of the freezing damage prevention waterproof cushion layer is horizontally arranged at a maximum freezing depth line (1), the outer layer high intensity fiber materials (2) of the groove with the inclined planes are in contact with frozen soil (8) on the side surfaces, artificial filled soil (7) is arranged in the inner layer high intensity fiber materials (5), and an embankment or a building fundation (6) is arranged above the artificial filled soil (7). The high intensity freezing damage prevention waterproof cushion layer overcomes coarse particles and has the advantages of wider application soil range without regional and environmental influences on construction, high intensity, good compressive and crack resistance, good ageing resistance, wide application environment and temperature range, stable quality and long service life of engineering.

Description

technical field [0001] The invention belongs to antifreeze damage facilities for highway and railway subgrades, in particular to a high-strength antifreeze damage water-proof cushion. Background technique [0002] There are countless capillaries in the subgrade soil. The groundwater mainly rises to the interior of the subgrade through the capillaries in the subgrade. When winter comes, when the negative atmospheric temperature enters the ground, the free water on the surface first freezes into ice crystals. As the temperature continues to drop, The outermost layer of bound water also begins to freeze, making the ice crystals gradually expand and forming an ice interlayer in the soil layer. After the water is frozen, the volume will increase by 9%, which will cause the soil to bulge with expansion, and frost heaving will occur. The more fine particles, the more capillaries will be formed and the greater the impact on the roadbed. Therefore, methods such as gravel, medium-coa...

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Problems solved by technology

However, for the method of replacing the foundation soil with coarse particles, the "pollution prevention" problem of the gravel cushion and the problem of taking materials on the spot hinder its development in engineering applications. Although dynamic compaction is suitable for a wide range of soil types, the equipment is simple , convenient construction, material saving, low cost, but its applica

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