ROCK AND EARTH DAM Russian patent published in 2013 - IPC E02B7/06 

FIELD: construction.

SUBSTANCE: dam comprises a core from clayey soil, upper and lower transition zones from a non-cohesive soil, upper and lower prisms, at least the lower of which is made from rock riprap, a head of non-swelling soil, a retaining wall from concrete, a layer from an air-impermeable material and equipment required for operation of the dam. The dam head includes a heated reinforced concrete gallery, between external supports of which there is a section of free surface of the core comb arranged. The retaining wall has specified height, is installed in the dam base at the lower side of the core and adjoins it in a water impermeable manner. The retaining wall comprises in its body a footway on elevations that are not flooded at the side of the lower reach. The layer of the air impermeable materials covers the dam comb and its lower slope, at least within the height of the head and has dark colour. The upper wall of the gallery is made as water impermeable, and the lower wall of the gallery comprises air ducts, which provide for hydraulic connection of the gallery cavity with the pore space of the rock riprap of the head and the lower prism. The retaining wall comprises air ducts, which provide for hydraulic connection of the footway cavity with the pore space of the rock riprap of the lower prism in the place of its adjacency to the lower face of the retaining wall. Equipment may via the gallery cavity and the footway cavity provide for forced motion of warm atmospheric air along the rock riprap of the lower prism.

EFFECT: invention provides for positive temperatures near a comb and a lower face of a dam core, core freezing is prevented, and higher dam reliability during its operation.

12 cl, 2 dwg