Anti-rotation suction cylinder anchoring foundation

Abstract

The invention discloses an anti-rotation suction cylinder anchoring foundation which comprises a suction cylinder, an anti-torsion cover and a balancing weight. The anti-torsion cover is of a flat circular ring structure and is provided with a sealing plate on the bottom side; the anti-torsion cover is sleeved and fixed on the suction barrel sealing cover; a plurality of compartments which are uniformly distributed along the circumferential direction are arranged in the anti-torsion cover; an anchor point is arranged on the right side wall of the suction barrel, when the anchor point is located above the optimal loading point, the balancing weight is arranged in the left side compartment, and when the anchor point is located below the optimal loading point, the balancing weight is arranged in the right side compartment; the optimal loading point is an anchor point position with the highest bearing force of the suction tube anchoring foundation; and an anti-scouring sheet is arranged right above the anchor point, is made of a flexible material, is connected to the bottom of the anti-torsion cover through a steel rope and is tightly attached to the side wall of the suction barrel. The comprehensive bearing performance of the suction cylinder anchoring foundation can be improved, the rotation amplitude of the foundation is restrained, meanwhile, water flow can be prevented from scouring a passive area soil body, and the safety reserve of an anchoring system is improved.

Description

Technical Field

[0001] The invention relates to marine foundation engineering, in particular to an anti-rotation suction tube anchoring foundation. Background Art

[0002] As the main foundation form of the existing mooring system, the bearing capacity of the suction cylinder mooring foundation is directly related to the safety of its floating platform. At present, there are limited methods to improve the bearing capacity of the suction cylinder mooring foundation. With the increasing scale of marine engineering, it is necessary to configure suction cylinder foundations with larger and larger diameters to provide higher bearing capacity, which greatly increases the cost. Summary of the invention

[0003] Purpose of the invention: The purpose of the present invention is to provide a rotation-resistant suction tube anchoring foundation with good load-bearing performance and economy.

[0004] Technical solution: An anti-rotation suction cylinder mooring foundation of the present invention includes a suction cylinder, an anti-torsion cover and a counterweight block; the anti-torsion cover is a flat circular ring structure, and a sealing plate is provided on the bottom side; the anti-torsion cover is sleeved and fixed on the suction cylinder cover; the anti-torsion cover has a plurality of compartments evenly distributed along the circumferential direction; an anchor point is provided on the right side wall of the suction cylinder, and when the anchor point position is above the optimal loading point, the counterweight block is placed in the left compartment, and when the anchor point position is below the optimal loading point, the counterweight block is placed in the right compartment; the optimal loading point is the anchor point position with the highest bearing capacity of the suction cylinder mooring foundation.

[0005] Furthermore, the plurality of compartments are formed by arranging a plurality of partitions inside the anti-twist cover, and the plurality of compartments are centrally symmetrical about the center of the anti-twist cover.

[0006] Furthermore, the height of the partition is 0.1 to 0.2 m.

[0007] Furthermore, the thickness of the anti-twist cover is smaller than the thickness of the suction tube cover, and when the suction tube is installed, the bottom surface of the anti-twist cover just contacts the soil.

[0008] Furthermore, after the suction cylinder is installed, the counterweight is lowered into the corresponding compartment through the anchor chain.

[0009] Furthermore, the anti-twist cover is connected to the suction tube cover by welding.

[0010] Furthermore, the outer diameter of the anti-twist cover is 1 to 2 meters larger than the diameter of the suction tube.

[0011] Furthermore, the counterweight block is a hollow structure, the interior of which is filled with industrial waste.

[0012] Furthermore, an anti-scour sheet is arranged just above the anchor point. The anti-scour sheet is made of a flexible material, connected to the bottom of the anti-torsion cover through a steel rope and closely attached to the side wall of the suction cylinder.

[0013] During the service period, seawater continuously scours the soil around the suction cylinder, and the repeated tightening of the anchor chain will form seabed grooves, resulting in a significant reduction in the foundation bearing capacity. The present invention further provides an anti-scouring sheet on the soil side above the anchor chain to effectively prevent the passive zone soil from being affected by scouring, thereby ensuring the bearing performance of the foundation during service.

[0014] Furthermore, the flexible material includes plastic.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages:

[0016] When the suction cylinder anchor foundation bears the inclined load transmitted by the anchor chain, the foundation will rotate in different directions due to the difference in the position of the anchor point, resulting in a decrease in the horizontal bearing performance. The present invention pre-applies a negative bending moment to offset the rotation caused by the horizontal load by providing an anti-torsion cover and a counterweight block, thereby effectively improving the horizontal bearing performance of the foundation and suppressing the rotation amplitude of the foundation.

[0017] The vertical bearing capacity of the suction cylinder mooring foundation is much smaller than its horizontal bearing capacity. The mooring system usually reduces the vertical load transmitted by the deadweight of the extra-long anchor chain. The present invention increases the overall weight of the suction cylinder foundation by adding a counterweight block, thereby improving its vertical bearing capacity and enhancing the safety reserve of its floating platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an anti-rotation suction cylinder anchoring foundation provided by an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 Top view of the . DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Attached Figures 1 to 2 The reference numerals in the figures are as follows:

[0022] 1, suction cylinder; 2, anti-torsion cover; 20, partition; 21, compartment; 22, counterweight; 23, anti-scour plate; 3, anchor point.

[0023] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides an anti-rotation suction cylinder anchoring foundation, comprising a suction cylinder 1, an anti-torsion cover 2 and a counterweight block 22, and an anchor point 3 is arranged on the right side wall of the suction cylinder 1.

[0024] The anti-torsion cover 2 is a flat ring structure with a sealing plate on the bottom. The anti-torsion cover 2 is sleeved and welded to the sealing cover of the suction cylinder 1. The outer diameter of the anti-torsion cover 2 is set according to the actual engineering needs, and is usually 1 to 2 meters larger than the diameter of the suction cylinder 1. The thickness of the anti-torsion cover 2 is less than the thickness of the sealing cover of the suction cylinder 1. When the suction cylinder 1 is installed, the bottom surface of the anti-torsion cover 2 just contacts the soil.

[0025] Four partitions 20 are arranged inside the anti-twist cover 2 to form four compartments 21 evenly distributed along the circumferential direction, and the four compartments 21 are centrally symmetrical about the center of the anti-twist cover 2. The height of the partition 20 is 0.1-0.2 m.

[0026] The placement position of the counterweight 22 is related to the position of the anchor point 3. When the anchor point 3 is above the optimal loading point, the counterweight 22 is placed in the left compartment 21; when the anchor point 3 is below the optimal loading point, the counterweight 22 is placed in the right compartment 21.

[0027] The suction cylinder anchor foundation has a loading point with the best theoretical bearing performance, and its approximate position can be determined through numerical simulation, usually 0.6 to 0.8 times the length of the cylinder downward along the cylinder cover. When anchor point 3 coincides with the optimal loading point, after applying an inclined load on anchor point 3, the suction cylinder foundation only moves horizontally without rotating; when anchor point 3 is above the optimal loading point, after applying an inclined load, the suction cylinder foundation rotates clockwise; when anchor point 3 is below the optimal loading point, after applying an inclined load, the suction cylinder foundation rotates counterclockwise.

[0028] The counterweight block 22 is a hollow structure, and its structural form is not required. The counterweight block 22 is filled with industrial waste, such as steel slag, etc. After the suction cylinder 1 is installed, the counterweight block 22 is lowered into the corresponding compartment 21 through the anchor chain.

[0029] An anti-scour sheet 23 is arranged directly above the anchor point 3 . The anti-scour sheet 23 is made of a flexible material (such as plastic) and is connected to the bottom of the anti-twist cover 2 through a steel rope and is close to the side wall of the suction cylinder 1 .

Claims

1. A rotation-resistant suction cylinder anchoring foundation, comprising a suction cylinder (1), characterized in that: It also comprises an anti-twist cover (2) and a counterweight (22); the anti-twist cover (2) is a flat circular ring structure, and has a sealing plate on the bottom side; the anti-twist cover (2) is sleeved and fixed on the suction cylinder (1) sealing cover; the anti-twist cover (2) has a plurality of compartments (21) uniformly distributed along the circumferential direction; an anchor point (3) is provided on the right side wall of the suction cylinder (1); when the anchor point (3) is located above the optimal loading point, the counterweight (22) is placed on the left compartment (21); when the anchor point (3) is located below the optimal loading point, the counterweight (22) is placed on the right compartment (21); the optimal loading point is the anchor point position with the highest bearing capacity of the suction cylinder anchoring foundation.

2. The anti-rotation suction cylinder anchoring foundation according to claim 1 is characterized in that: The plurality of compartments (21) are formed by arranging a plurality of partition plates (20) inside the anti-twist cover (2), and the plurality of compartments (21) are centrally symmetrically structured with respect to the center of the anti-twist cover (2).

3. The anti-rotation suction cylinder anchoring foundation according to claim 2 is characterized in that: The height of the partition (20) is 0.1 to 0.2 m.

4. The anti-rotation suction cylinder anchoring foundation according to claim 1, characterized in that: The thickness of the anti-twist cover (2) is smaller than the sealing thickness of the suction cylinder (1). When the suction cylinder (1) is installed, the bottom surface of the anti-twist cover (2) just contacts the soil.

5. The anti-rotation suction cylinder anchoring foundation according to claim 1, characterized in that: After the suction cylinder (1) is installed, the counterweight (22) is lowered into the corresponding compartment (21) via the anchor chain.

6. The anti-rotation suction cylinder anchoring foundation according to claim 1, characterized in that: The anti-twist cover (2) is connected to the suction cylinder (1) cover by welding.

7. The anti-rotation suction cylinder anchoring foundation according to claim 1, characterized in that: The outer diameter of the anti-twist cover (2) is 1 to 2 meters larger than the diameter of the suction cylinder (1).

8. The anti-rotation suction cylinder anchoring foundation according to claim 1, characterized in that: The counterweight (22) is a hollow structure, and the interior thereof is filled with industrial waste.

9. The rotation-resistant suction cylinder anchoring foundation according to any one of claims 1 to 8, characterized in that: An anti-scour sheet (23) is arranged directly above the anchor point (3). The anti-scour sheet (23) is made of a flexible material and is connected to the bottom of the anti-twist cover (2) through a steel rope and is closely attached to the side wall of the suction cylinder (1).

10. The anti-rotation suction cylinder anchoring foundation according to claim 9, characterized in that: The flexible material includes plastic.

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