A Combined Suction Anchor Reinforced by Grouting Spiral Anchor

Abstract

The invention discloses a combined suction anchor reinforced by a grouting spiral anchor, which comprises a gravity suction anchor, an L-shaped skirt plate and a spiral anchor. The gravity suction anchor used in this device is composed of the suction anchor top plate and the suction anchor cylinder wall, and at the same time, the concrete briquetting block is used to reach the estimated set position faster in the self-weight penetration stage of the suction anchor. Afterwards, the L-shaped skirt is lifted to the outside of the suction anchor through the lifting lug, and the L-shaped skirt is connected to the suction anchor with the skirt fixing bolts. The spiral anchor penetrates the prefabricated skirt hole on the L-shaped skirt into the depth of the seabed, grouts the concrete through the skirt hole to the seabed soil area loosened by the insertion of the spiral bolt, and forms concrete reinforcement after the concrete solidifies Area. In the present invention, by combining the grouting screw anchor, the skirt anchor and the gravity suction anchor, the vertical, horizontal bearing capacity and anti-overturning bearing capacity of the suction anchor are improved, and the safety performance and engineering performance of the suction anchor are improved at the same time.

Description

Technical field[0001]The invention relates to a combined suction anchor, in particular to a combined suction anchor reinforced by a grouting spiral anchor.Background technique[0002]With the increasing shortage of global energy, the development and utilization of new energy has received extensive attention from all countries in the world. Among them, marine wind energy, as a new type of pollution-free, renewable green energy, is of great significance to the sustainable development of the global society. Therefore, offshore wind power With rapid development like mushrooms after a rain, suction anchors, as the basic form of the ocean, have the characteristics of adapting to a variety of marine environments.[0003]Suction anchors have the characteristics of simple construction, safety, reliability, and reusability. Compared with traditional structural piles, gravity anchors, and chain anchors, they have better economic characteristics. However, in actual projects, suction anchors often f...

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Problems solved by technology

But this patent does not substantially improve the anti-overturning bearing capacity of the suction anchor

[0006] (2) The Chinese patent application number 201820207173.4 introduces a soil plugging-proof suction anchor, including a suction anchor main body, and lateral wing tubes are evenly distributed around the side wall of the suction anchor main body, but the patent main tube is connected to multiple side tubes After being integrated, the integrity is not strong, and it is difficult to exert the carrying capacity as a whole

However, the patent does not improve the anti-overturning bearing capacity

[0008] (4) The Chinese patent with the application number 201711253347.7 introduces a suction-type cylindrical foundation that can rotate downwards, including an anchor cylinder with a closed top surface and an open bottom end, and a rotating power cylinder at the top of the anchor cylinder. This patent significantly reduces the suction force Anchor penetration resistance, but the patent installation is difficult and the soil bearing capacity is reduced due to the excessive disturbance of the soil due to the rotation installation

[0009] (5) The Chinese patent with the application number 201711253348.1 introduces a hollow threaded suction anchor that can rotate downward by itself, including an anchor tube with a closed top surface and an open bottom end. The top of the anchor tube is provided with a drainage hole, which is connected to the submersible pump I , the combination of suction and rotation reduces the penetration resistance and improves the installation efficiency, but this patent fails to improve the anti-overturning bearing capacity of the suction anchor when it is pulled diagonally above the anchor chain

[0010] (6) The Chinese patent application number 201720217185.0 introduces a new type of submarine skirt suction anchor, which includes a concentric suction main barrel, a double skirt structure and an annular groove. The double skirt structure is composed of double skirts that is The outer skirt and the inner skirt surround the cylindrical structure around the periphery of the main suction barrel, but the skirt structure of this patent has little effect on the bearing capacity

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