FIELD: hydraulic construction.;SUBSTANCE: invention relates to the field of hydraulic engineering construction, in particular to dams made from ground materials, and can be used in construction of high composite-type rockfill dams with a core to create deep reservoirs on mountain rivers in seismically active regions. In earthquakes and uneven deformations in core of such dams, water-conducting cracks can occur, which reduce performance and reliability of structure. In order to improve reliability of structure in case of intensive seismic action and manifestations of uneven operational deformations with occurrence of water-conducting cracks in dam core and its base, composite-type rockfill dam with core comprising central part 1 of mixture of disconnected mineral soil with clay aggregate and enclosing its closed shell 2. Closed shell 2 is made of the same mixture with reduced content of disjointed mineral soil of smaller size and with increased moisture content of clay aggregate. In such a dam, simultaneously with core water impermeability increase in contact zones, healing effect of cracks resulted due to their colmatation by particles of disconnected mineral soil is achieved. In dam core junction upper zone to rock foundation sides 4, enclosing core central part closed shell 2 can be strengthened by geotextile cloths 7.;EFFECT: invention is promising for use in hydraulic facilities construction, in land reclamation and in the field of environmental engineering.;1 cl, 3 dwg
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