The invention relates to an anchoring assembly for fastening an element (20) to the ground, the element including an orifice (22).The invention is characterized by the fact that anchoring assembly comprises: an anchoring part (40); a flexible line (60) having a first end that is fastened to the anchoring part, the flexible line being designed to pass through the orifice; and a blocking device (80) including an opening, the flexible line extending through the opening, and blocking means (86) for blocking sliding of the flexible line in the opening, the blocking device being suitable for taking up a first position in which the flexible line can slide in the opening in such a manner as to adjust the distance between the blocking device and the anchoring part, and a second position in which the flexible line is blocked in the blocking device in such a manner as to prevent the blocking device from moving relative to the anchoring part.