CN114134891A

CN114134891A - Screw anchor assembly

Info

Publication number: CN114134891A
Application number: CN202210109701.3A
Authority: CN
Inventors: 罗仑博; 张子良; 张炜; 田英辉; 王乐; 岳洋; 代加林; 李洲
Original assignee: China Three Gorges Corp
Current assignee: China Three Gorges Corp
Priority date: 2022-01-29
Filing date: 2022-01-29
Publication date: 2022-03-04

Abstract

The present invention provides a screw anchor assembly comprising: an anchor rod; the friction disc is provided with a mounting hole, and the anchor rod penetrates through the mounting hole; the positioning structure is movably arranged in the mounting hole and is provided with a locking position connected with the anchor rod and an unlocking position separated from the anchor rod. When the anchor rod and the friction disc need to be assembled, the friction disc is installed from top to bottom, and the upper end of the anchor rod penetrates through the installation hole. When the anchor rod and the friction disc are relatively moved to a preset position, the positioning structure is matched with the anchor rod, and the friction disc and the anchor rod are locked together. The anchor rod and the friction disc can be quickly and simply installed through the structure, so that the cost is saved, and the installation risk is reduced. Therefore, the technical scheme of the invention overcomes the defect of high difficulty in installation and construction of the spiral anchor and the friction disc in the prior art.

Description

Screw anchor assembly

Technical Field

The invention relates to the technical field of offshore operation equipment, in particular to a spiral anchor assembly.

Background

The development and utilization of ocean resources need the support of a large ocean engineering platform, and the anchoring foundation at the lower part of the large ocean engineering platform plays a key role in the stability of the ocean platform. For the anchoring foundation of a large offshore platform, human research and application have a long history, from the last 70 th century, ocean oil and gas development is carried out into deep water, floating platform facilities begin to replace fixed platforms to become main development facilities, and how to safely, economically and reliably anchor a floating structure on the seabed becomes a key technology for developing deep-sea oil and gas resources. Currently, the spiral anchor foundation is beginning to be applied to the field of offshore wind power and is considered as one of the high-efficiency foundation types. The spiral anchor foundation has high resistance to plucking bearing capacity, but, the spiral anchor receives reverse moment of torsion rotation soil surface easily, causes the toppling and destruction of superstructure, in order to avoid the emergence of above-mentioned condition, need exert certain vertical pressure on the spiral anchor, utilizes the weight of friction disk self and the weight of upper portion riprap, can increase the pressure on spiral anchor upper portion effectively, through combining together friction disk foundation and spiral anchor foundation, can also improve overall structure's anti-skidding and anti-toppling bearing capacity simultaneously. Under the condition of the same steel consumption, the composite basic form of the two has more excellent bearing performance.

However, due to the particularity of the rotary pressing installation of the spiral anchor foundation, the installation and construction difficulty is high after the spiral anchor and the friction disc are spliced. It is therefore common in the prior art to assemble the spiral bolts after they have been installed in place. And considering the complexity of the offshore construction environment, the conventional butt joint construction mode has high precision requirement and large construction difficulty.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect of high difficulty in installation and construction of the screw anchor and the friction disc in the prior art, and provide a screw anchor assembly.

In order to solve the above problems, the present invention provides a screw anchor assembly comprising: an anchor rod; the friction disc is provided with a mounting hole, and the anchor rod penetrates through the mounting hole; the positioning structure is movably arranged in the mounting hole and is provided with a locking position connected with the anchor rod and an unlocking position separated from the anchor rod.

Optionally, the location structure includes the kicking block, and the kicking block is provided with the constant head tank along radially movably setting on the lateral wall of mounting hole on the lateral wall of stock, and the kicking block is suitable for and the constant head tank cooperation.

Optionally, the positioning structure further comprises an elastic member disposed between the top block and the side wall of the mounting hole, the elastic member being adapted to apply an elastic force to the top block in a direction toward the center line of the mounting hole.

Optionally, a mounting groove is formed in the side wall of the mounting hole, the elastic piece is a spring, the spring is arranged in the mounting groove, and the top block is connected with the spring.

Optionally, the top block is multiple, and the multiple top blocks are arranged at intervals along the circumferential direction of the mounting hole.

Optionally, the locating slot is an annular slot.

Optionally, the outer surface of the top block is provided with a first guiding bevel.

Optionally, the upper end of the anchor rod is provided with a second guiding bevel.

Optionally, the lower end of the mounting hole is provided with a third guiding inclined surface.

Optionally, a grouting hole is arranged at the positioning groove of the anchor rod.

The invention has the following advantages:

by using the technical scheme of the invention, when the anchor rod and the friction disc need to be assembled, the friction disc is installed from top to bottom, and the upper end of the anchor rod penetrates through the installation hole. When the anchor rod and the friction disc are relatively moved to a preset position, the positioning structure is matched with the anchor rod, and the friction disc and the anchor rod are locked together. The anchor rod and the friction disc can be quickly and simply installed through the structure, so that the cost is saved, and the installation risk is reduced. Therefore, the technical scheme of the invention overcomes the defect of high difficulty in installation and construction of the spiral anchor and the friction disc in the prior art.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 shows a schematic cross-sectional view of a helical anchor assembly of the present invention;

FIG. 2 shows an enlarged schematic view at A in FIG. 1;

FIG. 3 shows a schematic structural view of a friction disk of the screw anchor assembly of FIG. 1;

FIG. 4 shows a schematic structural view of the shank of the screw anchor assembly of FIG. 1; and

fig. 5 shows a schematic view of the use of the screw anchor assembly of fig. 1.

Description of reference numerals:

10. an anchor rod; 11. positioning a groove; 12. a second guide slope; 13. grouting holes; 20. a friction disk; 21. mounting holes; 211. mounting grooves; 212. a third guide slope; 30. a positioning structure; 31. a top block; 311. a first guide slope; 32. an elastic member.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 and 2, a screw anchor assembly of the present embodiment includes a shank 10, a friction disc 20, and a positioning structure 30. Wherein, the friction disc 20 is provided with a mounting hole 21, and the anchor rod 10 passes through the mounting hole 21. The positioning structure 30 is movably disposed within the mounting hole 21, the positioning structure 30 having a locked position coupled to the anchor rod 10 and an unlocked position decoupled from the anchor rod 10.

With the technical solution of the present embodiment, when it is required to assemble the anchor rod 10 and the friction disc 20, the friction disc 20 is installed from top to bottom, and the upper end of the anchor rod 10 is passed through the installation hole 21. When the anchor rod 10 and the friction disc 20 are relatively moved to a predetermined position, the locating structure 30 engages the anchor rod, thereby locking the friction disc 20 and the anchor rod 10 together. The above structure allows the anchor rod 10 and the friction disk 20 to be quickly and easily installed, thereby saving cost and reducing installation risk. Therefore, the technical scheme of the embodiment overcomes the defect that the installation and construction difficulty of the screw anchor and the friction disc in the prior art is high.

It should be noted that the anchor rod 10 is a rod-shaped structure, and a spiral drilling plate is disposed at the lower end of the anchor rod 10, so that the anchor rod 10 can penetrate into the seabed soil. The friction disc 20 is a block-like structure, and as will be appreciated by those skilled in the art, a cross-sectional block diagram of the friction disc 20 is shown in FIG. 1 for ease of illustration of the locating feature.

As shown in fig. 1 and 2, in the solution of the present embodiment, the positioning structure 30 includes a top block 31, and the top block 31 is movably disposed on the sidewall of the mounting hole 21 in the radial direction of the mounting hole 21. The side wall of the anchor rod 10 is provided with a positioning slot 11, and the top block 31 is adapted to cooperate with the positioning slot 11.

Specifically, the top block 31 is movable in the radial direction, so that the top block 31 can be inserted into the positioning groove 11 or be removed from the positioning groove 11. That is, when the top block 31 is inserted into the positioning groove 11, the top block 31 is in the locking position, and the relative position between the friction disk 20 and the anchor rod 10 is locked. When the top block 31 is released from the positioning slot 11, the top block 31 is in the unlocking position, and the friction disc 20 and the anchor rod 10 can relatively slide along the circumferential direction.

Based on the above structure, as shown in fig. 5, during construction, the anchor rod 10 is first inserted into the soil body at a predetermined position, the anchor rod 10 is externally used on the soil body to be fixed with the friction disk 20 by the remaining length, and the soil body is reinforced after the insertion is completed. The friction disc 20 is then lifted and the friction disc 20 slowly descends at a constant speed under the force of the friction disc 20 itself. When the friction disc 20 moves until the top block 31 corresponds to the location of the locating slot 11, the top block 31 snaps into the locating slot 11, thereby fixing the relative positions of the friction disc 20 and the anchor rod 10.

As shown in fig. 3, in the solution of the present embodiment, the positioning structure 30 further includes an elastic member 32, the elastic member 32 is disposed between the top block 31 and the sidewall of the mounting hole 21, and the elastic member 32 is adapted to apply an elastic force to the top block 31 in a direction toward the center line of the mounting hole 21. Specifically, the elastic force of the elastic member 32 can cause the positioning structure 30 to be pushed into the positioning groove 11, so that the relative position between the anchor rod 10 and the friction disk 20 is fixed.

As shown in fig. 3 and 4, in the solution of the present embodiment, a mounting groove 211 is provided on a side wall of the mounting hole 21. Preferably, the elastic member 32 is a spring, which is disposed in the mounting groove 211, and the top block 31 is coupled with the spring.

Specifically, the spring is accommodated in the mounting groove 211, and when the top block 31 is not subjected to an external force, a portion of the top block 31 is accommodated in the mounting groove 211 (i.e., an end portion of the top block 31 protrudes from an inner sidewall of the mounting hole 21).

When assembly is performed, the upper end of the anchor rod 10 pushes against the ejector block 31, thereby causing the ejector block 31 to retract inwardly. When the friction disc 20 moves until the top block 31 is aligned with the detent 11, the top block 31 is inserted into the detent 11 by the elastic force of the spring, so that the relative position between the anchor rod 10 and the friction disc 20 is fixed.

Preferably, both ends of the spring are connected with the mounting groove 211 and the top block 31 by welding, thereby ensuring the connection strength of the spring.

As shown in fig. 3 and 4, in the solution of the present embodiment, there are a plurality of top blocks 31, and the plurality of top blocks 31 are arranged at intervals along the circumferential direction of the mounting hole 21. Specifically, the number of the top blocks 31 is two, and accordingly, the number of the springs is also two. The positioning groove 11 is an annular groove to facilitate the assembly of the top block 31. And preferably, the mounting groove 211 is also an annular groove.

As shown in fig. 3, in the solution of the present embodiment, the outer surface of the top block 31 is provided with a first guiding inclined surface 311. Specifically, the first guide slope 311 is provided at a lower portion of the top block 31. When the fitting is performed, the upper end of the anchor rod 10 pushes the first guide slope 311, thereby retracting the knock block 31 inward.

As shown in fig. 4, in the present embodiment, the upper end of the anchor rod 10 is provided with a second guide slope 12. Specifically, the upper end of the anchor 10 has a reduced diameter structure. The second guiding bevel 12 can on the one hand cooperate with the first guiding bevel 311 such that the second guiding bevel 12 pushes against the first guiding bevel 311. On the other hand, the second guide slope 12 makes the upper end of the anchor rod 10 smaller in diameter, facilitating the upper end of the anchor rod 10 to be inserted into the installation hole 21.

As shown in fig. 3, in the solution of the present embodiment, the lower end of the mounting hole 21 is provided with a third guiding slope 212. Specifically, the lower end of the mounting hole 21 is flared. The third guide slope 212 allows the diameter of the lower end of the installation hole 21 to be large, so that the upper end of the anchor rod 10 can be guided to facilitate the upper end of the anchor rod 10 to be inserted into the installation hole 21.

As shown in fig. 4, in the solution of the present embodiment, a grouting hole 13 is provided at the positioning slot 11 of the anchor rod 10. Specifically, when grouting is performed after the foundation is installed, grouting is performed from the top of the anchor rod 10, and when grouting is performed to the positioning groove 11, grouting material is flowed to the top block 31, so that the anchor rod 10 and the friction disk 20 are tightly coupled.

Based on the above description, the present invention designs a novel installation technique for assembling a screw anchor and a friction disc, which has an automatic locking function by providing a spring, a top block and a guide structure (i.e., a second guide slope and a third guide slope) on the friction disc. The anchor rod and the friction disc can be rapidly and simply installed through the structure, the cost is saved, and the installation risk is reduced. The spiral anchor and the friction disc are assembled, so that the bearing capacity of the spiral anchor and the friction disc can be fully exerted, and the spiral anchor structure can be more stable due to the self weight of the friction disc. The composite foundation is an assembly body, and the size, the material and the position of the spiral anchor, the friction disc, the spring and the top block can be adjusted according to the actual environment and soil conditions. The spiral anchor friction disc has no excessive requirements on materials of the spiral anchor and the friction disc, is low in processing difficulty and convenient to transport, and can be produced, transported and installed in batches when being suitable for fixing large ocean engineering. Therefore, the invention is a novel spiral anchor and friction disk mounting technology, the designed novel friction disk structure has the advantages of production modularization, low production cost, flexible transportation, low mounting difficulty and excellent bearing capacity, and the composite structure is a novel structural type with high practical value.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A screw anchor assembly, comprising:

an anchor rod (10);

the friction disc (20) is provided with a mounting hole (21), and the anchor rod (10) penetrates through the mounting hole (21);

a positioning structure (30) movably disposed within the mounting hole (21), the positioning structure (30) having a locked position coupled to the anchor bar (10) and an unlocked position decoupled from the anchor bar (10).

2. Screw anchor assembly according to claim 1, wherein the positioning structure (30) comprises a top block (31), the top block (31) being movably arranged on a side wall of the mounting hole (21) in a radial direction of the mounting hole (21), the side wall of the anchor rod (10) being provided with a positioning slot (11), the top block (31) being adapted to cooperate with the positioning slot (11).

3. The screw anchor assembly according to claim 2, wherein the positioning structure (30) further comprises a resilient member (32), the resilient member (32) being arranged between the top piece (31) and a side wall of the mounting hole (21), the resilient member (32) being adapted to exert a resilient force on the top piece (31) in a direction towards a centre line of the mounting hole (21).

4. Screw anchor assembly according to claim 3, wherein a mounting groove (211) is provided on a side wall of the mounting hole (21), the elastic member (32) is a spring, the spring is disposed in the mounting groove (211), and the top block (31) is connected with the spring.

5. The screw anchor assembly according to any one of claims 2 to 4, wherein the top block (31) is plural, and the plural top blocks (31) are provided at intervals in the circumferential direction of the mounting hole (21).

6. Screw anchor assembly according to claim 5, wherein the positioning slot (11) is an annular groove.

7. Screw anchor assembly according to any one of claims 2 to 4, wherein the outer surface of the top block (31) is provided with a first guiding bevel (311).

8. Screw anchor assembly according to any one of claims 2 to 4, wherein the upper end of the shank (10) is provided with a second guiding bevel (12).

9. Screw anchor assembly according to any one of claims 2 to 4, wherein the lower end of the mounting hole (21) is provided with a third guiding bevel (212).

10. Screw anchor assembly according to any one of claims 2 to 4, wherein a grout hole (13) is provided at the positioning slot (11) of the anchor rod (10).