FIELD: construction, road engineering.
SUBSTANCE: invention relates to the field of earth works production in stripping works, digging pits and trenches under permafrost soil condition. The method to prepare permafrost soil for development is realised by water distribution along the surface of the unfrozen section. At the same time after natural thawing of soil to the depth of 0.15-0.20 m the thawed soil is removed, to form a "trough", and running water is sent into it along the surface of the frozen section with a flow rate of 5-10 l/m2 of the surface per hour. At the same time preparation of permafrost soil is carried out in summer period at the air temperature of more than 0°C and water temperature of at least +1°C.
EFFECT: higher efficiency of permafrost soils unfreezing.
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