METHOD FOR ERECTING A TUBULAR DRAINAGE OF A COMBINED DESIGN Russian patent published in 2023 - IPC E02B11/00 

FIELD: hydraulic engineering construction.

SUBSTANCE: method for erecting a pipe drainage of a combined design. The method includes installation of a water intake part, consisting of drainage perforated pipes 1, on which stiffening rings are arranged at a distance from each other with a rib height equal to the thickness of the water intake part, and installation of a discharge part of flexible mattresses 7. Around the perforated water discharge pipes 1 of the water intake part and between the stiffening rings, geomats 3 are wrapped in layers with a thickness equal to the height of the ribs of the stiffening rings, forming, together with the perforated pipe 1, the water intake part of the drainage, which is wrapped in a protective sheath of gabion mesh 5. The outlet part is made of flexible cylindrical mattresses 7, which are made of perforated pipes wrapped around with geomats and geogrid, which are laid in dense rows 6 from the water intake part of the drainage in the direction of the filtration flow towards the downstream of the structure at a certain distance from each other.

EFFECT: improving the efficiency of drainage in flat areas of rivers, earthen dams and dams.

1 cl, 5 dwg