A combined suction anchor reinforced by grouting screw anchor

Abstract

This utility model relates to the field of marine engineering, and particularly to a combined suction anchor reinforced with a grouting helical anchor. It includes a first column, a second column with a helical groove, and a helical block. The first column has an internal hollow groove design, into which the second column is inserted. The outer wall of the second column has a helical block with a helical design and an elastic mechanism. The outer wall of the first column has a helical groove, and the upper end of the first column has a connection port. This device, through the insertion and combination of the first and second columns and the pre-contraction state of the helical block controlled by air pressure, reliably ejects the helical block and engages with the helical groove, instantly forming a powerful external helical anchoring structure. This improves operational efficiency and solves the problems of low installation efficiency, insufficient anchoring force, and difficulty in adapting to complex seabed geological conditions in existing seabed foundation construction devices.

Description

Technical Field

[0001] This utility model relates to the field of marine engineering, and in particular to a combined suction anchor reinforced with a grouting helical anchor. Background Technology

[0002] A suction anchor is a basic anchoring device used in marine engineering, typically a cylindrical structure with a closed top and an open bottom. During installation, a pump creates negative pressure inside, using the water pressure difference at the seabed surface to force it into the sediment, thus providing strong pull-out resistance for subsea facilities (such as floating platforms, pipelines, and wind power equipment). Its advantages include rapid installation, precise positioning, high load-bearing capacity, and minimal disturbance to the seabed.

[0003] A search revealed patent publication number CN208088329U, which discloses a soil plug-proof suction anchor. The anchor includes a main body with lateral wing tubes evenly distributed around its sidewalls. These lateral wing tubes are connected to the sidewalls of the main body via wing plates. A boss is located at the top of the main body, and a negative pressure interface is located at the top of the boss. This soil plug-proof suction anchor is simple, reliable, safe, and secure. It features a multi-cylinder composite load-bearing auxiliary structure, effectively preventing foundation weakening and failure. The top soil plug removal structure based on the hydraulic scouring principle effectively prevents soil plug bulging that may occur during installation.

[0004] While existing technologies can achieve certain anchor pile effects in use, they also have drawbacks: low installation efficiency, insufficient anchoring force, and difficulty in adapting to complex seabed geological conditions. In view of this, we propose a combined suction anchor reinforced with grouting spiral anchors, which solves the above problems. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a combined suction anchor reinforced with grouting spiral anchors.

[0006] The technical solution of this utility model is: a combined suction anchor reinforced by grouting spiral anchor, including a column one, a column two with spiral groove and spiral block. The inside of the column one is a hollow groove design, and the column two is inserted into the hollow groove. The outer wall of the column two is provided with a spiral block with a spiral design and elastic mechanism. The outer wall of the column one is provided with spiral groove. The upper end of the column one is provided with connection port.

[0007] When using this device, preparations are made on land first. Gas is injected into the space between column one and column two through the connection port, so that the helical block is just not inserted into the helical groove. At this time, the spring is in a compressed state. Then, the device is transported into the sea and buried in the predetermined area on the seabed surface. Then, an external underwater pump is connected to the connection port, and pressure (grouting) is continued to be applied to the area between column one and column two. Under the pressure, column two moves downward, and the helical block is just inserted into the helical groove, so that a threaded helical block appears on the outer wall of column one. At this time, the device can achieve the effect of fixing and positioning. Applying external force to rotate it can make it rotate into the harder seabed. The one-way valve releases pressure when the device is lifted. This device can achieve the effect of combined rapid insertion into the seabed and reinforcement of anchor points, thus optimizing the seabed foundation construction and having high practicality.

[0008] Preferably, the upper outer wall of the second column is provided with a multi-layered sealing ring. After the second column is inserted into the first column, the sealing ring provides an effective sealing effect. The multi-layered sealing ring ensures the reliability of the dynamic seal between the first and second columns. In the two key stages of inflation pre-compression and high-pressure grouting expansion, it effectively prevents the leakage of the pressure medium (gas / grout) and ensures that the pressure driving the second column can be stably established. This is a key guarantee for the smooth operation of the entire hydraulic expansion mechanism and improves the stability and success rate of the device.

[0009] Preferably, the upper end of the column is provided with sinkers on both sides, and a connecting block is rotatably installed inside the sinker. The cooperation between the sinker and the rotatable connecting block facilitates quick and flexible connection with hoisting equipment or installation frame before or during construction. This not only facilitates preparation and transportation on land, but also adapts to the swaying and adjustment needs of ships at sea, enhancing the convenience of construction and the operability of the device.

[0010] Preferably, grooves are formed between the spiral blocks, and guide rails arranged in a ring array are provided on the inner wall of the first column. The grooves are inserted into the guide rails. Through the insertion and cooperation of the grooves and guide rails, precise axial guidance and circumferential limiting are provided for the movement of the second column relative to the first column, preventing it from deflecting or jamming under pressure. This ensures that the spiral blocks can be accurately aligned and embedded in the spiral grooves of the first column, guaranteeing the accuracy and reliability of the deformation process.

[0011] Preferably, the lower end of the second column is provided with a conical head, and the outer wall of the conical head is provided with a protrusion. The conical head greatly reduces the end resistance when the device penetrates the seabed. The protrusion on its outer wall can slightly disturb the soil during the penetration process. While maintaining smooth penetration, it creates more favorable conditions for the penetration and diffusion of subsequent grouting slurry, which helps to form a larger anchor body, thereby further improving the final anchoring force.

[0012] Preferably, a one-way valve is embedded in the outer wall of the upper end of column one, and the integrated one-way valve forms a safe and reliable pressure relief channel. When it is necessary to recycle or adjust the device, the residual pressure in the cavity between column one and column two can be safely released through this valve, causing the spiral block to retract under the action of the spring, releasing the locking state with the surrounding soil, thereby realizing the recyclability or adjustability of the device, increasing the flexibility of application and reducing risks.

[0013] Preferably, the thickness of the spiral block is slightly smaller than the width of the spiral groove. The spiral block is inserted into the groove on the two surfaces of the column, and a spring is provided inside the groove. The dimensional fit between the spiral block and the spiral groove ensures tight engagement, while the reserved space prevents jamming. The spring mechanism inside the groove provides the elastic force to reset the spiral block and is the core component for realizing the bidirectional "contraction-expansion" movement of the spiral block, ensuring the device's stable and automatic switching function between the two states.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] I. This utility model, through its innovative retractable spiral structure design, achieves intelligent switching of device states and dynamic enhancement of anchoring performance. During transportation and initial penetration, the inflation pressure causes the spiral block to retract, and the device takes on a streamlined columnar structure, minimizing penetration resistance and achieving rapid, low-energy initial positioning and insertion. This effectively overcomes the shortcomings of traditional spiral anchors, such as difficulty in "biting" the soil and inaccurate positioning in deep-water complex strata. Once the device is in place, high-pressure grouting is performed through the connection port. Driven by liquid pressure, the second column moves downward, forcing the spiral block to overcome spring resistance, extend radially, and precisely engage within the spiral groove of the first column, thereby instantly forming a full-size continuous threaded anchoring surface on the seabed. This two-stage anchoring mechanism of "penetration first, then shaping" not only avoids the large torque rotation and corresponding complex heavy equipment required for traditional spiral anchor installation, greatly reducing construction difficulty and cost, but also enhances the anchoring force from the traditional end-bearing-friction hybrid mode to friction anchoring with ultra-large surface area through the formation of the ultra-large spiral contact surface. This significantly enhances the pull-out bearing capacity and stability of the device, making it particularly suitable for soft and loose seabed geological conditions, and providing a more reliable foundation solution for offshore wind power, aquaculture facilities and other applications.

[0016] II. Based on the first beneficial effect, the anchoring performance of traditional fixed helical anchors cannot be changed once their geometry is determined, while the anchoring form of this utility model can be adjusted according to geological feedback. Under preset pressure, the extension degree of the helical block can form a dynamic balance with the stratum resistance. If the resistance is too high in hard strata, the grouting pressure will increase synchronously. The system can judge and optimize the grouting parameters accordingly, and even suspend pressurization to avoid structural damage, thus achieving controllability and adjustability of the construction process. In addition, the device integrates the function of grouting anchor rods. The high-pressure injected grout can penetrate into the surrounding soil, effectively improving the mechanical properties of the soil near the anchor point, forming a solidified enlarged head, further increasing the anchoring force several times. After completion, the pressure can be safely released through a one-way valve, facilitating the recovery of construction equipment. This design, which integrates rapid penetration, intelligent deformation, pressure grouting, and soil improvement, subverts the traditional seabed anchoring operation mode and provides core technical equipment for achieving efficient, economical, and reliable offshore engineering construction.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] Figure 1 This is an exploded view of the present invention;

[0019] Figure 2 This is a schematic diagram of the guide rail position of this utility model;

[0020] Figure 3 This is a three-dimensional schematic diagram of the present invention;

[0021] Figure 4 This is a schematic diagram showing the position of the spring in this utility model.

[0022] Figure label:

[0023] 1. Column one; 2. Connection port; 3. Settling groove; 4. Spiral groove; 5. Column two; 6. Groove; 7. Conical head; 8. Spiral block; 9. Sealing ring; 10. Guide rail; 11. Check valve; 12. Connecting block; 13. Spring. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more readily understood, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0028] Example 1

[0029] Please see Figures 1-4 As shown, this embodiment is a combined suction anchor reinforced with grouting spiral anchor, including column 1, column 2 5 spiral groove 4 and spiral block 8. The inside of column 1 is a hollow groove design, and column 2 5 is inserted into the hollow groove. The outer wall of column 2 5 is provided with spiral block 8 with elastic mechanism in spiral design. The outer wall of column 1 is provided with spiral groove 4, and the upper end of column 1 is provided with connection port 2.

[0030] When using this device, preparations are made on land first. Gas is injected into the space between column 1 and column 5 through connection port 2, so that the spiral block 8 is just not inserted into the spiral groove 4. At this time, the spring 13 is in a compressed state. Then, the device is transported into the sea and buried in the preset area on the seabed surface. Then, the external underwater pump is connected to connection port 2, and pressure (grouting) is continued to be applied to the area between column 1 and column 5. Under the pressure, column 25 moves downward, and the spiral block 8 is just inserted into the spiral groove 4, so that the spiral block 8 appears on the outer wall of column 1. At this time, the device can achieve the effect of fixing and positioning. Applying external force to rotate it can make it rotate into the interior of a harder seabed. One-way valve 11 performs pressure relief when the device is lifted. This device can achieve the effects of combined rapid insertion into the seabed and reinforcement of anchor points, optimize seabed foundation construction, and has high practicality.

[0031] The upper outer wall of column 2 5 is equipped with a multi-layered sealing ring 9. After column 2 5 is inserted into column 1, the sealing ring 9 provides an effective sealing effect. The multi-layered sealing ring 9 ensures the reliability of the dynamic seal between column 1 1 and column 2 5. In the two key stages of inflation pre-compression and high-pressure grouting expansion, it effectively prevents leakage of pressure medium (gas / grout) and ensures that the pressure driving column 2 5 can be stably established. It is the key guarantee for the smooth operation of the entire hydraulic expansion mechanism and improves the stability and success rate of the device.

[0032] Example 2

[0033] Please see Figures 1-4 As shown, this embodiment, based on embodiment 1, further includes: a sinkhole 3 is provided on both sides of the upper end of the column 1, and a connecting block 12 is rotatably installed inside the sinkhole 3. The cooperation between the sinkhole 3 and the rotatable connecting block 12 facilitates quick and flexible connection with hoisting equipment or installation frame before or during construction. This not only facilitates preparation and transportation on land, but also adapts to the swaying and adjustment needs of ships at sea, enhancing the convenience of construction and the operability of the device.

[0034] Grooves 6 are provided between the spiral blocks 8, and guide rails 10 arranged in a ring array are provided on the inner wall of the column 1. The grooves 6 are inserted into the guide rails 10. Through the insertion and cooperation of the grooves 6 and the guide rails 10, the movement of the column 2 5 relative to the column 1 is provided with precise axial guidance and circumferential limit, preventing it from deflecting or jamming under pressure. This ensures that the spiral blocks 8 can be accurately aligned and embedded in the spiral grooves 4 of the column 1, thus guaranteeing the accuracy and reliability of the deformation process.

[0035] The lower end of column 2 5 is provided with a conical head 7, and the outer wall of the conical head 7 is provided with a protrusion. The conical head 7 greatly reduces the end resistance when the device penetrates the seabed. The protrusion on its outer wall can slightly disturb the soil during the penetration process. While maintaining smooth penetration, it creates more favorable conditions for the penetration and diffusion of subsequent grouting slurry, which helps to form a larger anchor body, thereby further improving the final anchoring force.

[0036] A one-way valve 11 is embedded in the outer wall of the upper end of column 1, forming a safe and reliable pressure relief channel. When it is necessary to recycle or adjust the device, the residual pressure in the cavity between column 1 and column 2 5 can be safely released through this valve, causing the spiral block 8 to retract under the action of spring 13, releasing the locking state with the surrounding soil. This achieves the recyclability or adjustability of the device, increases the flexibility of application, and reduces risks.

[0037] The thickness of the spiral block 8 is slightly smaller than the width of the spiral groove 4. The spiral block 8 is inserted into the groove on the surface of the column 5, and a spring 13 is provided inside the groove. The dimensional fit between the spiral block 8 and the spiral groove 4 ensures tight engagement, while the reserved space prevents jamming. The spring 13 mechanism inside the groove provides the elastic force to reset the spiral block 8. It is the core component for realizing the bidirectional "contraction-expansion" movement of the spiral block 8, ensuring the stable and automatic switching function of the device between the two states.

[0038] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A combined suction anchor reinforced with grouting spiral anchor, comprising column one (1), column two (5), spiral groove (4), and spiral block (8), characterized in that: The interior of column one (1) is designed with a hollow groove, and column two (5) is inserted into the hollow groove. The outer wall of column two (5) is provided with a spiral block (8) with a spiral design and elastic mechanism. The outer wall of column one (1) is provided with a spiral groove (4). The upper end of column one (1) is provided with a connection port (2).

2. A combined suction anchor reinforced with a grouting spiral anchor as described in claim 1, characterized in that: The upper outer wall of the second column (5) is provided with a multi-layered sealing ring (9). After the second column (5) is inserted into the first column (1), the sealing ring (9) provides an effective sealing effect.

3. A combined suction anchor reinforced with a grouting spiral anchor according to claim 2, characterized in that: The upper end of the column (1) is provided with sinkholes (3) on both sides, and a connecting block (12) is rotatably installed inside the sinkhole (3).

4. A combined suction anchor reinforced with a grouting spiral anchor as described in claim 1, characterized in that: The spiral blocks (8) are provided with grooves (6), and the inner wall of the column (1) is provided with guide rails (10) arranged in a ring array. The grooves (6) are inserted into the guide rails (10).

5. A combined suction anchor reinforced with a grouting spiral anchor according to claim 1, characterized in that: The lower end of the column (5) is provided with a conical head (7), and the outer wall of the conical head (7) is provided with a protrusion.

6. A combined suction anchor reinforced with a grouting spiral anchor according to claim 1, characterized in that: A one-way valve (11) is embedded in the outer wall of the upper end of the column (1).

7. A combined suction anchor reinforced with a grouting spiral anchor according to claim 1, characterized in that: The thickness of the spiral block (8) is slightly less than the width of the spiral groove (4). The spiral block (8) is inserted into the groove on the surface of the column (5), and a spring (13) is provided inside the groove.

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