FIELD: construction.
SUBSTANCE: ground dam comprises a body and an antifiltration device arranged within the limits of the central part of the ground dam body and coupled with permafrost soils in a watertight manner. Coupling is carried out by means of an ice-soil shell made of a moist cohesive soil, arranged within the limits of the middle part of the ground dam foot on natural surface of permafrost soils and frozen to them. The lower end of the antifiltration device is jammed in the ice-soil shell for the specified value in a watertight manner. Cooling elements of the freezing system are arranged in an ice-soil shell and provide for maintenance of this shell in a frozen, ice-soil condition during operation of the ground dam.
EFFECT: invention prevents disturbance of watertightness in the upper layer of permafrost soils when erecting a ground dam and during its operation, improved quality of watertight coupling of the antifiltration device with permafrost soils and better accuracy of soils thawing forecasting.
5 cl, 3 dwg
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