METHOD OF CREATION OF CUT-OFF CURTAINS WITH FILTER WINDOWS Russian patent published in 2015 - IPC E02B3/16 

FIELD: agriculture.

SUBSTANCE: method comprises development and filling of the trench 1 with impervious material from geomembrane 2. Before lowering into the trench 1 of the geomembrane 2 the additional plate of geomembrane 4 is glued to it 3. The space between the geomembrane 2 and the additional plate 4 is filled with sorbing-filter material 5 to form a drainage system of rectangular shape. In the main 2 and the additional plate 4 of the geomembrane on opposite sides near the places of gluing 3 of the additional plate 4 the filter windows 6 are made. At the inlet to the drainage system from the side of groundwater dam 7 in the additional plate 4 of the geomembrane and in the main geomembrane 2, in the place of location of the filter windows 6, in the soil to a depth of the trench the receiving 8 and the outlet 9 niches are located, which are filled with coarse filter material 10.

EFFECT: improvement of efficiency of purification of contaminated groundwater flow and increase in the volume of its passing.

1 dwg