The drainage device with the screen from the Angle PROFILE

摘要

The drainage device with screen of the angular profile, comprising a perforated tube with an impermeable screen formed intermittently along the length, and a filter material filled into the ground shield gap, characterized in that the screen is made of an angular profile facing upward angle, the angle at the top of the screen is 180 ° -2α, where α - angle of internal friction of the backfill soil.