Combined suction anchor reinforced by grouting spiral anchor

A combined suction anchor reinforced by a grouting spiral anchor, comprising a gravity suction anchor, an L-shaped skirt board and a spiral anchor;

• wherein the gravity suction anchor is closed at an upper end and open at a lower end and comprises a suction anchor top plate and a wall of a suction anchor barrel body, a groove is formed between the wall of the suction anchor barrel body and the suction anchor top plate, and a concrete press block is provided in the groove;
• and the suction anchor top plate is further provided with a suction anchor negative pressure hole, and a suction anchor eye is provided at an upper end of the suction anchor negative pressure hole;
• the L-shaped skirt board has an annular shape and is provided with skirt board lugs that are symmetrically arranged at an upper part of the L-shaped skirt board, the skirt board lugs are configured to lift the L-shaped skirt board to outside of the suction anchor to be connected to the suction anchor, and a plurality of rows of skirting anchors are provided at a lower part of the L-shaped skirt board, so as to improve a horizontal bearing capacity and an anti-pulling bearing capacity of the suction anchor;
• and
• the spiral anchor comprises a spiral anchor rod and an anti-rotation plate provided at an top end of the spiral anchor rod, the spiral anchor rod is vertically and rotatably installed into seabed soil through a skirt board hole formed in the L-shaped skirt board, until the anti-rotation plate contacts the L-shaped skirt board, and concrete is poured through the skirt board hole to form a concrete reinforced area.