MULTILAYER MEMBRANE WITH DRAINAGE ELEMENT Russian patent published in 2020 - IPC E02B3/16 

FIELD: construction.

SUBSTANCE: invention relates to hydraulic engineering and nature protection construction and can be used in making anti-filtration and drainage coatings on polygons of solid domestic, industrial and municipal wastes in order to protect soil, ground and underground water from contamination, as well as centralized discharge of liquid filtrate. Multilayer imperfection coating with drainage element includes preparation of soil base 1, laying of anti-filtration element 2 of bentonite mats, laying of protective layers 3, drainage element 4, represented by composite material consisting of two layers of non-woven geotextiles, between which there are polymer perforated drain tubes with perforation in upper part. Draining element 4 in multilayer screen is arranged with inclination towards water intake collector in order to efficiently collect and centralize discharge of liquid filtrate. At the same time filtrate drainage from drainage element is made to water intake collector arranged near end part of tubes, with subsequent collection of filtrate into settling pond.

EFFECT: use of multilayer imperfection coating with drainage element will allow to create combined screens on wastes accumulators, which enable not only to provide high anti-filtration effect, but also simultaneous removal of filtered liquid through system of drain devices made in composition of coating.

4 cl, 3 dwg