A device for and a method of inserting a drainage wick into the ground comprising the steps of: providing a drainage wick comprising a transversely permeable filter material surrounding a core adapted to longitudinal water circulation, where a portion of said drainage wick is arranged so as to be transversely and/or longitudinally impermeable; threading said drainage wick through an inserting tube; fixing an anchorage component to the lower end of said drainage wick extending out of said inserting tube; driving said anchorage component, said drainage wick and said inserting tube downwardly into the ground; and pulling up said inserting tube whereby said anchorage component and said drainage wick are permitted to remain into said ground.