Patent ID: 7618213

Claim:
A method for the manufacture of a geocomposite ( 1 , 2 ) that includes a drainage sheet ( 4 ) on which are placed perforated, girdled mini-drains ( 5 ) parallel to each other, and at least one filtration sheet ( 31 ) covering said mini-drains, characterized in that the method includes: a first step of superimposition of the following components ( 4 , 5 , 31 ): at least one drainage sheet, girdled mini-drains that include two series of perforations created with an offsetting groove, a first series of two diametrically opposing perforations created in every two grooves, a second series of two diametrically opposing perforations created in every two grooves offset by 90 degrees in relation to the first series; at least one filtration sheet, a second step of conveyance of the components thus superimposed by means of conveyance devices ( 6 , 7 ) to a needlepunching machine ( 8 ) in which needle plate ( 81 ) includes spaces ( 811 ) allowing the passage of the mini-drains ( 5 ), a third step for joining together of the components by needlepunching.