SU1189942A1 - Method of constructing an earth track - Google Patents

Abstract

A METHOD OF GROWING A GROUND COVER, which includes clearing the roadway from forest and shrubs, removing moss-growing cover, arranging lateral drainage ditches, natural thawing and draining the soils of the base during a warm period, layer-by-layer excavation of the soil as it is thawed and sifting down the soils of the base during the warm period, layer-by-layer excavation of the soil as it is thawed and dumping the soils of the base during the warm period, layer-by-layer excavation of the soil as it is thawed and dumping the soils of the base during the warm period, layer-by-layer excavation of the soil as it is thawed and dumping the soils of the base during the warm period, layer-by-layer excavation of the soil as it is thawed and dumped its compaction and erection of the embankment, characterized in that, in order to shorten the construction time of the web by preventing deep re-freezing and ensuring In winter, before the onset of the winter period, a layer of thermal insulation is laid on the surface of the cleared strip and it increases as the air temperature decreases, then after the end of the winter period before snow begins, not the thermal insulation layer is removed, and then the frozen, ice-saturated upper ice is removed. the ground layer of the base, and i the thawed ground is filled immediately after removal (L of the upper frozen layer on the thawed base of the said earth bed.

Description

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4 N5

The invention relates to mining and transport construction and can be used in the construction of land embankments in permafrost zones.

The purpose of the invention is to reduce the time of erection of the web by preventing deep re-freezing and to enable the base to be drained in winter.

The proposed method consists in the fact that a year before the construction of a landbed in the spring, the road strip is cleared from the forest and shrubs, the vegetation cover is removed and the side drainage ditches are arranged. The road strip prepared in this way is left for the entire summer period to achieve the required depth of thawing, preliminary draining and soil compaction.

Before the onset of the winter period, a layer of thermal insulation is placed on the surface of the cleared strip, for example, from fast-hardening foam, moss, snow, peat, foam, etc. materials. The thickness of the thermal insulation layer during the winter period increases as the air temperature decreases, so that the temperature on the ground surface under the thermal insulation maintains a temperature that ensures a long-term freezing of the upper soil layer throughout the winter, but to a small depth. In a closed system (thawed ground lies on the permafrost-water seal and there is no inflow from groundwater) in winter, the moisture from the thawed layer is intensively pulled (migrates) to the freezing front with the formation of ice layers in the upper freezing layer. This will allow, regulating the thickness of the thermal insulation layer, the speed and depth of frost penetration, to achieve the required degree of depleted soils during the winter period.

Before the end of the winter period prior to the start of snowing, neither the thermal insulation layer is removed, then the frozen upper layer of the soil is removed and the embankment is erected, layer by layer developing thawed ground with dumping on the thawed base immediately after removing the upper frozen layer.

This makes it possible to accelerate the flow of sediment of the base under the design load, to obtain a durable earth web and on it to make road pavement, i.e. to ensure the commissioning of the road almost a year earlier compared to known methods.

Claims (1)

METHOD FOR EARTHWAY CONSTRUCTION, including clearing the road lane from the forest and shrubs, removing mossy cover, installing lateral drainage ditches, natural thawing and drainage of the ground during the warm period, layer-by-layer development of the soil as it thaws and the ground is thawed on the ground web, its compaction and construction of the embankment, characterized in that, in order to reduce the time of construction of the canvas by preventing deep re-freezing and ensuring possible In order to drain the soil of the base in the winter, before the onset of the winter period, a layer of thermal insulation is laid on the surface of the cleaned strip and increase it as the air temperature drops, then after the end of the winter period before the snowmelt begins, the insulation layer is removed, after which the frozen ice-saturated upper layer of the base soil is removed, and § thawed soil is sprinkled immediately after removing the “upper frozen layer on the thawed foundation of the specified subgrade.