CN217778903U - Suction anchor structure - Google Patents

Suction anchor structure Download PDF

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Publication number
CN217778903U
CN217778903U CN202221263455.9U CN202221263455U CN217778903U CN 217778903 U CN217778903 U CN 217778903U CN 202221263455 U CN202221263455 U CN 202221263455U CN 217778903 U CN217778903 U CN 217778903U
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China
Prior art keywords
suction anchor
arc plate
main body
anchor structure
connecting rod
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CN202221263455.9U
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Inventor
王康杰
赵悦
何小花
陶安
俞华锋
贾献林
姜贞强
李炜
王永发
於刚节
杨玉宝
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PowerChina Huadong Engineering Corp Ltd
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PowerChina Huadong Engineering Corp Ltd
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Abstract

The utility model provides a suction anchor structure, which comprises a cylindrical suction anchor main body with a downward opening, arc plates positioned at two sides of the outer wall of the suction anchor main body, a drain valve and an anchoring part which are arranged on the top surface of the suction anchor main body; the convex surface of the arc plate is outward, the wall surface is smooth, the concave surface is inward, and the surface is rough; the bottom of the arc plate is rotatably connected with the suction anchor main body, one end of a connecting rod is hinged to the inner concave surface, and the other end of the connecting rod is hinged to the suction anchor main body, so that the arc plate can be folded or unfolded relative to the suction anchor main body. The technical scheme of the utility model wholly have simple structure, the atress is reasonable, the injection resistance is low, bearing capacity is high and the construction characteristics such as simple and easy, can realize the reliable anchor of ocean engineering structure, be applicable to the application scene of the deep and distant sea resource of big planning development. And can install fast and can retrieve and utilize, effectively practice thrift the construction cost of floating formula basis.

Description

Suction anchor structure
Technical Field
The utility model relates to an offshore wind power and ocean engineering structure's basic anchor technical field, concretely relates to suction anchor structure suitable for deep and distant ocean engineering.
Background
The exhaustion of fossil energy and global warming have become common problems facing the world, and the large-scale development of renewable energy and the reduction of carbon emission have become common knowledge of human society. At present, offshore wind power has the characteristics of abundant resources, high power generation utilization time, no land occupation and suitability for large-scale development, is the latest leading edge of global wind power development, and the development of offshore wind power gradually advances from offshore to deep and distant sea in a new development period. The deep sea area of China not only has rich wind energy resources, but also reserves a great amount of mineral and oil gas resources, and the development and utilization of the deep water area become a major measure of the strong national strategy of the ocean of China.
The deep and far sea engineering is not suitable for fixed foundations such as traditional single piles and guide pipe frames due to the large water depth, and a floating foundation consisting of a suction type cylindrical structure and anchor chains becomes the first choice. The deep and far sea environment is severe, the engineering geological condition is complex, and the suction anchor structure faces a plurality of technical problems of overlarge sinking penetration resistance, insufficient bearing performance in service, difficult recovery and extraction and the like.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the utility model is to overcome the defects existing in the prior art and provide a suction anchor structure with simple structure, low penetration resistance and high bearing performance.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
a suction anchor structure comprises a cylindrical suction anchor main body with a downward opening, arc plates positioned on two sides of the outer wall of the suction anchor main body, a drain valve and an anchoring part, wherein the drain valve and the anchoring part are arranged on the top surface of the suction anchor main body; the convex surface of the arc plate is outward, the wall surface of the arc plate is smooth, the concave surface of the arc plate is inward, and the surface of the arc plate is rough; the bottom of the arc plate is rotatably connected with the suction anchor main body, one end of a connecting rod is hinged to the inner concave surface, and the other end of the connecting rod is hinged to the suction anchor main body, so that the arc plate can be folded or unfolded relative to the suction anchor main body.
Furthermore, two connecting rods which are arranged side by side are arranged on each circular arc plate.
Furthermore, each circular arc plate is also provided with an auxiliary mechanism, and the auxiliary mechanism comprises a first sleeve and a pair of movable steel bolts; the first sleeve is fixed on the circular arc plate and positioned between the two connecting rods, the inner end of the movable steel bolt is respectively positioned in the end part of the first sleeve, and the outer end of the movable steel bolt penetrates through the end part of the adjacent connecting rod to be hinged with the connecting rod; the movable steel bolt can be separated from the connecting rod inwards after being stressed, so that the arc plate loses the action with the connecting rod.
Furthermore, the auxiliary mechanism further comprises a limiting part which is funnel-shaped, the inner end of the movable steel bolt is stopped in the large opening end of the limiting part in a natural state, and the inner end of the movable steel bolt moves towards the small opening end of the limiting part after being stressed.
Furthermore, the auxiliary mechanism comprises a cable, and the cable is respectively connected with the inner end of the movable steel bolt and converged at one position, then extends out of the first sleeve and is fixed on a cable hole at the top of the suction anchor main body.
Furthermore, the auxiliary mechanism further comprises a second sleeve, the second sleeve is vertically connected to the middle position of the first sleeve, and the cable is led out through the second sleeve.
Furthermore, a fixed pulley is further arranged on the inner concave surface of the arc plate, and the fixed pulley is located above the first sleeve and is used for the cable to pass through.
Furthermore, the shape of the arc plate gradually approaches to be straight from bottom to top.
The technical scheme has the characteristics of simple structure, reasonable stress, low injection resistance, high bearing performance, simple construction and the like, can realize reliable anchoring of the ocean engineering structure, and is suitable for application scenes of large-scale planning and development of deep and open sea resources. And can install fast and can retrieve and utilize, effectively practice thrift the construction cost of floating formula basis. Particularly, (1) through setting up the smooth degree difference in both sides and rotatable circular arc board, can effectively solve suction anchor structure and sink the too big injection resistance in complicated geological conditions, lead to unable problem that passes through to the design depth down. (2) Through setting up auxiliary device, can increase the friction effect of suction anchor structure and soil body, enlarge the scope of the overburden that receives the influence in-process of loading, improve the resistance to plucking bearing capacity of unidimensional suction anchor structure, solved the lower problem of small-size suction anchor structure resistance to plucking bearing capacity. (3) The two movable steel bolts are arranged in the sleeve connecting device, and the position adjusting arc plate of each movable steel bolt and the connecting rod are kept in different connection states at different working stages of the suction anchor, so that the suction anchor structure can be submerged and reliably connected with the connecting piece at the in-place service stage, and the arc plate and the connecting rod can be thoroughly disconnected at the suction anchor structure recovery and extraction stage. (4) The suction anchor structure can simultaneously improve the anti-pulling bearing characteristic of the same-size suction anchor structure, can reduce the injection resistance of the same-size suction anchor structure, and provides a practical and economic solution for the anchoring type of the ocean engineering structure in China.
Drawings
Fig. 1 is a schematic view of the longitudinal section structure of the present invention.
Fig. 2 is a schematic cross-sectional structural diagram of the present invention.
Fig. 3 is a schematic view of the vertical section structure of the auxiliary device of the present invention.
Fig. 4 is a schematic view of the auxiliary device in the penetration process of the suction anchor of the present invention.
Fig. 5 is a schematic view of the auxiliary device in the recovery process of the suction anchor of the present invention.
Fig. 6 is a schematic view of the process of the suction anchor structure of the present invention penetrating into mud downwards.
Fig. 7 is a schematic view of the suction anchor structure of the present invention during the on-site operation.
Fig. 8 is a schematic view of the process of recovering and extracting the suction anchor structure of the present invention.
In the figure: the device comprises a suction anchor body 1, an arc plate 2, a connecting rod 3, a mooring rope 4, a mooring rope hole 5, an anchoring part 6, a drain valve 7, a fixed pulley 8, a first sleeve 9, a second sleeve 10, a movable steel bolt 11, a limiting part 12, a hinge shaft 13, a seabed soil body 14, an anchor chain 15 of an upper ocean structure, an anchor chain 16 of a hoisting device, an outer convex surface 20 of the arc plate, an inner concave surface 21 of the arc plate, a connecting rod connecting port 30, an inner end 110 of the movable steel bolt and an outer end 111 of the movable steel bolt.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Reference is made to fig. 1-5. The suction anchor structure of this embodiment includes that the opening is decurrent tube-shape suction anchor main part 1, be located the circular arc board 2 of 1 outer wall both sides of suction anchor main part and set up in drain valve 7 and the anchor assembly 6 of 1 top surfaces of suction anchor main part. Wherein, the convex surface of the arc plate 2 is processed outwards and the wall surface is processed smoothly, and the concave surface is processed inwards and the surface is processed roughly, thus ensuring the low resistance penetration and high bearing load of the suction anchor structure. The two arc plates 2 are radially and symmetrically arranged, and the radian of the arc plates 2 in the height direction gradually approaches to be straight from bottom to top. The bottom of the circular arc plate 2 is hinged with the suction anchor body 1 through a hinge shaft 13.
The arc plate 2 is further provided with an auxiliary device, and the auxiliary device comprises a first sleeve 9, a second sleeve 10, a pair of movable steel bolts 11, a pair of limiting members 12, a fixed pulley 8 and a cable 4. The inner concave surface of each circular arc plate 2 is provided with a pair of connecting rods 3 which are horizontally arranged side by side. Specifically, the first sleeve 9 is horizontally fixed on the concave surface of the circular arc plate 2 and located between the two connecting rods 3, one end of each connecting rod 3 is provided with a connecting port 30, the inner end 110 of the movable steel bolt 11 is arranged in the end of the first sleeve 9, and the outer end 111 penetrates into the end connecting port 30 of the adjacent connecting rod 3 to be rotatably connected with the connecting rod 3, so that one end of each connecting rod 3 is hinged to the circular arc plate 2. The other end of the connecting rod 3 is hinged with the outer side wall of the suction anchor body 1. Therefore, the circular arc plate 2 can be folded or unfolded with respect to the force anchor main body 1 within a certain range. Therefore, the arc plate 2 has different working states when the suction anchor structure sinks for injection, is in-place loaded and is recovered and pulled out, and the suction anchor structure can be ensured to have low resistance for injection, high load bearing and effective recovery.
The limiting piece 12 is arranged in the first sleeve and corresponds to the movable steel bolt 11, the limiting piece 12 is funnel-shaped, the large opening end faces the connecting rod 3, and the small opening end is close to the first sleeve 9. The inner end 110 of the movable steel bolt is stopped in the large opening end of the limiting member 12 in a natural state, and the inner end 110 of the movable steel bolt can move towards the small opening end of the limiting member 12 after being stressed, so that the circular arc plate 2 is disconnected from the connecting rod 3, and the constraint effect of the connecting rod 3 is lost.
The second sleeve 10 is vertically connected to the middle position of the first sleeve 9 and communicated with the first sleeve 9, and the second sleeve 10 is positioned at the top position of the first sleeve 9. Still be equipped with fixed pulley 8 on the interior concave surface of circular arc board 2, fixed pulley 8 is close to the top of circular arc board 2 and is located first sleeve 9 tops.
The inner end of each movable steel bolt 11 is provided with a cable 4, and the two cables 4 pass through the limiting piece 12, intersect at the vertical position of the first sleeve 9 and the second sleeve 10, extend out of the second sleeve 10 and are fixed on the cable hole 5 at the top of the suction anchor main body 1 through the fixed pulley 8. The cable hole 5 is disposed near the top edge of the suction anchor body 1. The mooring rope 4 is lifted upwards, the movable steel bolt 11 overcomes the limit part 12 and is separated from the connecting rod connecting port 30, different working states exist when the suction anchor structure is sunk for penetration, is in-place loaded and recovered and pulled out, the suction anchor body 1 and the auxiliary device 2 are guaranteed to be tightly connected and reliably loaded when being sunk for penetration and in-place loaded, and are disconnected during recovery and stable recovery.
Reference is made to fig. 6, 7 and 8. When in use, the suction anchor structure sinking penetration construction method of the embodiment comprises the following steps:
step 1, checking whether two movable steel bolts 11 in a sleeve connecting device 8 are inserted into corresponding connecting rod connecting ports 30 or not, and ensuring that each movable steel bolt 11 is inserted into a corresponding connecting rod 3;
step 2, checking whether the cable 4 is fixed in a cable hole 5 on the periphery of the top of the suction anchor or not, and ensuring that the cable 4 is connected into the cable hole 5;
step 3, opening a drain valve 7, lifting and lowering the suction anchor structure to the surface of the sea bed, wherein the suction anchor structure penetrates through the surface of the sea bed under the action of self gravity and enters a sea bed soil body 14 to complete the self-weight mud entering process;
step 4, after the self-weight mud entering is completed, water pumping negative pressure penetration is carried out on the suction anchor structure, and in the process, the arc plate and the auxiliary device 2 are in contact with the seabed soil body 14 and sink below the mud surface; because the outer convex surface 20 of the arc plate is subjected to smoothing treatment, the penetration resistance of the suction anchor structure in the process of sinking penetration can be effectively reduced;
step 5, the arc plate 2 is connected with the side wall of the suction anchor main body 1 through the hinge shaft 13, so that after the auxiliary device enters the seabed soil body 13, the arc plate rotates around the hinge shaft 13 to the direction close to the suction anchor main body 1 due to the action of the injection resistance, and the disturbance to the soil body around the suction anchor 1 can be effectively reduced;
step 6, continuing pumping water to sink until the inner side of the top of the suction anchor main body contacts the seabed soil 14, stopping pumping water to sink, closing the drain valve 7, and penetrating the suction anchor structure to the designed depth;
step 7, after the suction anchor structure is completely penetrated, after the strength of seabed soil 14 around the anchor is recovered for a period of time, connecting an anchor chain 15 of an upper ocean structure to a central anchor chain anchoring part 6 at the top of the suction anchor main body, and gradually expanding the arc plate under the action of pulling load on the upper ocean structure to increase the friction of the soil in a cylinder and the range of the affected overlying soil layer, so that the pulling bearing performance of the suction anchor structure can be effectively improved;
and 8, completing a sinking penetration stage by the suction anchor structure with low penetration resistance and high bearing performance, and starting an in-place loading stage.
After the suction anchor structure of the embodiment is in service, the suction anchor structure needs to be recovered and pulled out, and the recovery and pulling construction method comprises the following steps:
step 1, pulling a cable 4 fixed in a cable hole 5 at the top of a suction anchor body 1 upwards, pulling two movable steel bolts 11 inserted into a first sleeve 9 out of a connecting rod connecting port 30 through respective corresponding limiting parts 12, so as to realize disconnection between an arc plate 2 and a connecting rod 3, wherein the disconnected arc plate 2 can rotate around a hinge shaft 13 in a direction away from the suction anchor body 1, and even can rotate to the lower side of the hinge shaft 13;
step 2, opening a drain valve 7, and injecting water into the suction anchor main body 1, so that on one hand, water injection disturbance of a soil layer can be realized, and the soil strength is reduced; on the other hand, water injection pressurization can be realized, and jacking recovery of the suction anchor structure can be realized;
3, vertically and mechanically pulling up the hoisting device through an anchor chain 16 connected to the anchoring part 6 at the top of the suction anchor main body 1, slowly increasing the pulling-up force, and slowly pulling out the suction anchor structure;
step 4, in the process of slowly pulling out the suction anchor structure, the arc plate 2 rotates around the hinge shaft 13 to one side far away from the side wall of the suction anchor 1 under the action of upward pulling resistance;
step 5, slowly increasing the uplifting force of the lifting equipment until the suction anchor structure is pulled out of the seabed soil body 14, stopping water injection, and recovering the suction anchor structure to the ship by means of the lifting equipment;
and 6, completing the stage of recovering and pulling out the suction anchor structure with low penetration resistance and high bearing performance.
It should be noted that the above describes exemplifying embodiments of the invention. However, it should be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, which are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the scope of the present invention, and the changes and modifications are intended to fall within the scope of the present invention as claimed.

Claims (7)

1. A suction anchor structure is characterized by comprising a cylindrical suction anchor body with a downward opening, arc plates positioned on two sides of the outer wall of the suction anchor body, a drain valve and an anchoring part, wherein the drain valve and the anchoring part are arranged on the top surface of the suction anchor body; the convex surface of the arc plate faces outwards, the wall surface of the arc plate is smooth, the concave surface of the arc plate faces inwards, and the surface of the arc plate is rough; the bottom of the arc plate is rotatably connected with the suction anchor main body, one end of a connecting rod is hinged to the inner concave surface, and the other end of the connecting rod is hinged to the suction anchor main body, so that the arc plate can be folded or unfolded relative to the suction anchor main body.
2. A suction anchor structure according to claim 1, wherein two of said connecting rods are provided side by side on each of said circular arc plates.
3. The suction anchor structure as claimed in claim 2, wherein each of said circular arc plates is further provided with an auxiliary mechanism, said auxiliary mechanism comprising a first sleeve and a pair of movable steel bolts; the first sleeve is fixed on the arc plate and positioned between the two connecting rods, the inner end of the movable steel bolt is positioned in the end part of the first sleeve respectively, and the outer end of the movable steel bolt penetrates through the end parts of the adjacent connecting rods and is hinged with the connecting rods; the movable steel bolt can be separated from the connecting rod inwards after being stressed, so that the arc plate loses the action with the connecting rod.
4. A suction anchor structure according to claim 3, wherein the auxiliary mechanism further comprises a stopper, the stopper is funnel-shaped, the inner end of the movable steel bolt ends in the large opening end of the stopper in a natural state, and the inner end of the movable steel bolt moves toward the small opening end of the stopper after being forced.
5. A suction anchor structure according to claim 3, wherein the auxiliary mechanism comprises cables which are respectively connected to the inner ends of the movable steel bolts and converged together, and then extend out of the first casing and are fixed to the cable holes at the top of the suction anchor body.
6. A suction anchor structure according to claim 5, wherein said auxiliary mechanism further comprises a second casing, said second casing being attached perpendicularly to an intermediate portion of said first casing, said cable being routed through said second casing.
7. A suction anchor structure according to claim 5, wherein the concave inner surface of the circular arc plate is further provided with a fixed pulley, the fixed pulley is positioned above the first sleeve, and the cable passes through the fixed pulley.
CN202221263455.9U 2022-05-24 2022-05-24 Suction anchor structure Active CN217778903U (en)

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CN202221263455.9U CN217778903U (en) 2022-05-24 2022-05-24 Suction anchor structure

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Application Number Priority Date Filing Date Title
CN202221263455.9U CN217778903U (en) 2022-05-24 2022-05-24 Suction anchor structure

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CN217778903U true CN217778903U (en) 2022-11-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116374080A (en) * 2023-04-07 2023-07-04 中国长江三峡集团有限公司 Annular anchor recycling tool and annular anchor recycling method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116374080A (en) * 2023-04-07 2023-07-04 中国长江三峡集团有限公司 Annular anchor recycling tool and annular anchor recycling method

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