METHOD FOR COMBINED DRAINAGE DEVICE WITH AUGER WATER LIFT Russian patent published in 2020 - IPC E02B11/00 

FIELD: construction.

SUBSTANCE: invention relates to hydraulic engineering and land reclamation construction, in particular to a method of device for filtration water to be diverted into the lower waterway of the hydraulic power plant and to lower the depression surface in the body of the dam, in the base of which there are pressure waters, and can be used in drying territories having pressure water-bearing horizons. Method of combined drainage device with auger water lift includes laying closed horizontal drain collector 1 in trench 2 filled with coarse sand with filter of granular material, and installation of vertical wells-amplifiers 6 along closed horizontal drain collector 1, filtration columns of which connect pressure head 5 and trench 2, for discharge of flow from dam body with subsequent discharge of flow through closed horizontal drain collector 1. To extend the filtration path and to reduce the pressure gradient in the inner pipe of vertical well-booster 6, screw-auger 7 with a spiral welded on the blade is rigidly fixed, the edge of which is tightly connected, through seals, to the housing of vertical well-booster 6.

EFFECT: prevention of development of mechanical suffusion and unloading of pressure waters of the dam base into combined drainage at pressure gradients at the inlet of the filtration flow into the horizontal drain collector less than critical for the ground of the dam, longer service life of the horizontal drainage and reduction of costs for its repair.

1 cl, 1 dwg