Suction anchor capable of downwards penetrating to position below sea bottom surface and mounting method thereof

Abstract

The invention discloses a suction anchor capable of downwards penetrating to the position below the sea bottom surface. The suction anchor comprises an anchor bucket with a downward opening; a drainage hole is formed in the top end of the anchor bucket, and a plurality of opening conduits which communicate with the inside and outside of the anchor bucket are arranged at the top end of the anchor bucket; the upper portion of the drainage hole is connected with a submerged pump; the lower end of each opening conduit is connected with a spray nozzle communicating with the corresponding opening conduit through a bearing; the upper portion of each spray nozzle is in a hollow round tube shape and connected with the outer ring of the corresponding bearing, and the lower portion of each spray nozzle is an inverted regular hexagon prismoid; a bottom conduit used for vertically impacting on a sea bottom surface soil body is disposed on the lower bottom surface of each inverted regular hexagon prismoid; every three inclined conduits and every three horizontal conduits are alternately arranged on the corresponding six side surfaces; the angle between the center lines of every three inclined conduits and the center axis of the anchor bucket is 30 to 60 degrees; every three horizontal conduits are located in the same horizontal plane, and the tail ends of all the horizontal conduits are bent by a certain radian along the same circumference and in the same direction; and self-rotation of the spray nozzles is achieved through free rotation of the outer rings of the bearings. The invention further discloses a mounting method of the suction anchor at the same time.

Description

technical field [0001] The invention relates to a suction anchor capable of penetrating below the seabed and an installation method thereof. Background technique [0002] Suction anchor is a basic structural form widely used in marine engineering and has broad development prospects. Its structure is generally a steel cylinder with a closed top and an open bottom. At first, it falls freely with the help of gravity, and the lower edge of the cylinder is inserted into the soil. When the top of the anchor barrel is in contact with the seabed, the anchor barrel runs down and stops. At this time, the submersible pump is removed, and the installation of the suction anchor is completed. [0003] Generally, the bearing capacity of the suction anchor is mainly provided by the friction between the inner wall and the outer wall of the cylinder and the soil, and when the end of the suction anchor is level with the seabed, the downward penetration of the suction anchor stops, and the end...

AI Technical Summary

Problems solved by technology

Although the device penetrates the suction anchor below the seabed surface, the penetration depth formed by overcoming the normal stress between the end of the suction anchor and the seabed surface is limited.

In addition, the bearing capacity of the suction anchor still mainly comes from the friction between the inner and outer cylinder walls and the seabed soil, and the end of the suction anchor has not been effectively utilized.

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