Shoal elevator suitable for grouting screw anchor installation and using method thereof

Abstract

The invention discloses a shoal elevator suitable for grouting spiral anchor installation and a using method thereof. A spiral anchor fixed to the bottom of an anchoring base is screwed into an anchoring seabed, so that the anchoring base is fixed to a designated installation site, and shoal elevator installation is completed. When seabed soil is loosened, the rotary piling system starts to work, a sensor is arranged at the tip end of the grouting spiral anchor, and when the tip end touches seabed soil, an engineering ship can pressurize cement grout to the spiral anchor through a grouting pipe. And when the grouting screw anchor reaches the designed burial depth, the rotary piling system is disconnected from the grouting screw anchor, the fixed screw anchor at the bottom of the anchoring base is screwed out of the anchoring seabed, and the shoal elevator is pulled out of the seabed to be reused. According to the invention, the anchoring base can accurately reach a preset mounting site, and the deviation of the spiral anchor is reduced; it is ensured that the grouting spiral anchor reaches the sufficient penetration depth, and sufficient uplift bearing capacity is provided; the device is high in flexibility and suitable for shoal foundations of different oceans.

Description

Technical Field

[0001] The present invention belongs to the technical field of grouting screw anchors, and particularly relates to a shoal elevator applicable to the installation of grouting screw anchors and a using method thereof. Background Art

[0002] With the advancement of ocean resource development from coastal shoals to broader areas, more and more floating marine structures, such as floating oil production platforms, floating drilling platforms, and offshore booster stations, have become indispensable devices in ocean resource development. Under complex and variable ocean environments and geological conditions, with the increase in the number of floating marine structures, it is crucial to further improve the uplift bearing capacity of the anchoring structure. In addition, with the rapid development of renewable energy projects such as offshore wind power and shallow beach photovoltaic, the infrastructure construction of these projects also requires reliable anchoring solutions.

[0003] Due to its advantages such as a strong structure, convenient installation, low cost, and strong uplift resistance, the grouting screw anchor is widely used in the anchoring structures of coastal shoals. The grouting screw anchor is screwed into the seabed at a specified position through spiral blades. Combining with grouting technology, cement slurry is injected to fill the soil pores around the spiral blades to form a whole, improving the anchoring effect. However, during the installation process of traditional grouting screw anchors, they are affected by complex and variable ocean environments. Especially during the free screwing-in process, they are affected by lateral environmental loads (such as waves), resulting in a change in the penetration angle of the screw anchor from vertically downward to inclined downward, and a certain lateral displacement occurs before the screw anchor penetrates into the seabed. When the inclination angle and lateral displacement are large, it will seriously deviate from the designed anchor point and weaken the uplift bearing capacity of the grouting screw anchor.

[0004] With the continuous improvement of floating equipment in coastal shoals and the large-scale application of offshore wind power and shallow beach photovoltaic projects, more and more large and super-large floating marine structures require greater uplift bearing capacity. However, the traditional installation method of grouting screw anchors is difficult to accurately control the penetration angle and depth, and the uplift bearing capacity is limited. Therefore, there is an urgent need for a new grouting screw anchor installation technology to ensure its efficient anchoring performance in complex ocean environments and meet the needs of infrastructure construction such as offshore booster stations, offshore wind power, and shallow beach photovoltaic. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems raised in the background art, and propose a shoal elevator applicable to the installation of grouting screw anchors and a using method thereof.

[0006] To achieve the object of the present invention, the present invention discloses a shoal elevator suitable for the installation of grouting screw anchors, which includes a floating platform, a vertical guide rail, an anchoring base, a grouting pipe, and a rotary pile driving system; four vertical guide rails are connected to the lower part of the floating platform, the rotary pile driving system is fixed in direction through the vertical guide rails, the lower part of the vertical guide rails is connected to the anchoring base, and four fixed screw anchors are connected to the lower part of the anchoring base; the rotary pile driving system is provided with a grouting screw anchor, and the grouting pipe is connected to the grouting screw anchor.

[0007] Further, the fixed screw anchors at the bottom of the anchoring base are screwed into the anchoring seabed to fix the anchoring base at the designated installation location to complete the installation of the shoal elevator.

[0008] Further, the rotary pile driving system includes a fixed bracket, a vertical acceleration paddle, a rotary acceleration paddle, and a grouting screw anchor; the fixed bracket is composed of an embedded ball bearing, a steel bracket connecting the platform and a grouting hole; the fixed bracket is composed of steel brackets connecting the platform in the four directions of east, south, west, and north, the outermost end of the steel bracket connecting the platform is connected with a steel bracket hole for placing the vertical acceleration paddle, the middle and outer area of the steel bracket connecting the platform is composed of a roller bearing, the inner side of the roller bearing is connected with the vertical guide rail, and the middle part of the fixed bracket is the elevator connection part and the area where the grouting hole is located;

[0009] The fixed bracket is connected to the vertical acceleration paddle by welding, and the vertical acceleration paddle is fixed in the steel bracket hole. When the entire rotary pile driving system needs to move in the vertical direction, the vertical acceleration paddle is energized to provide a downward acceleration, so that the fixed bracket and the grouting pipe are connected by a leather plug. When grouting is required, an underwater robot is used to connect the grouting pipe to the grouting hole to complete the grouting process; the grouting screw anchor includes a sensor, a spiral blade, and a steel pipe; an anchor eye is provided at the topmost steel pipe of the grouting screw anchor for connecting with a chain; the grouting screw anchor is composed of a steel pipe and a pile tip from top to bottom, the steel pipe is surrounded by spiral blades on all sides, and a sensor for detecting the distance from the pile tip to the ground is provided on the side of the bottom pile body to determine the corresponding position of the pile;

[0010] When loosening the seabed soil, the rotary pile driving system starts to work. When the pile tip of the grouting screw anchor touches the seabed soil, the engineering ship pressurizes the cement slurry to the grouting screw anchor through the grouting pipe; when the grouting screw anchor reaches the designed burial depth, the rotary pile driving system is disconnected from the grouting screw anchor, and the fixed screw anchors at the bottom of the anchoring base are screwed out of the anchoring seabed to pull the shoal elevator out of the seabed for repeated use.

[0011] Further, the steel cable passes through the cable channel and the anchor eye and is fixed to the side of the grouting screw anchor.

[0012] Further, after the engineering vessel is put into the sea, the direction of the shoal elevator is controlled by the vertical acceleration paddle so that the equipment reaches the seabed surface; when the engineering vessel vertically drops the shoal elevator into the sea, the entire component moves downward under gravity. When the shoal elevator enters the water, the vertical acceleration paddle is powered on to make the vertical acceleration paddle rotate, pushing the shoal elevator downward. After the anchoring base contacts the bottom, the grouting screw anchor sensor measures its distance from the bottom seabed to determine the corresponding position of the pile.

[0013] Further, the lower part of the anchoring base is connected to the screw anchor. After the grouting screw anchor sensor feeds back that its distance from the bottom seabed is slowly changing for a long time, it indicates that the anchoring base has reached the seabed, and the grouting screw anchor is remotely controlled to rotate into the seabed; the power of the electric motor is increased to make the vertical acceleration paddle and the rotary acceleration paddle rotate faster, so that the pile enters the seabed soil and the real-time piling situation is detected by the sensor.

[0014] Further, after the rotary piling system contacts the seabed, the distance is detected by the grouting screw anchor. After the bottom of the anchoring base is fixed on the seabed surface, the power of the vertical acceleration paddle motor is increased to make the vertical acceleration paddle provide a downward acceleration, and the upward and downward speeds of the vertical acceleration paddle can be remotely controlled on the engineering vessel; the rotary acceleration paddle can provide torque for the grouting screw anchor, and through the forward and reverse rotation of the vertical acceleration paddle and the rotary acceleration paddle, the rotation direction and rotation speed can be remotely controlled on the engineering vessel.

[0015] To achieve the object of the present invention, the present invention also discloses a method for using a shoal elevator suitable for the installation of a grouting screw anchor, including the following steps:

[0016] Step 1: After the anchoring base is hoisted under the floating platform and kept vertically suspended, it quickly reaches the designated position by relying on free fall and the acceleration of the vertical propeller.

[0017] Step 2: After the floating platform reaches the designated location, the anchoring base is accurately reached at the predetermined installation location by remotely controlling the vertical acceleration paddle. The screw anchor fixed at the bottom of the anchoring base is rotated into the anchoring seabed to fix the anchoring base at the designated installation location to complete the installation of the shoal elevator.

[0018] Step 3: The rotary piling system is hoisted under the floating platform by the vertical guide rail and kept vertically suspended and released. The tip of the grouting screw anchor is reached at the seabed by remotely controlling the rotary piling system.

[0019] Step 4: When the tip of the grouting screw anchor reaches the seabed, start grouting remotely on the engineering vessel. While grouting, operate the pile driving system. The vertical acceleration paddle provides downward acceleration, and the rotational acceleration paddle provides the rotational torque for the grouting screw anchor. Ensure that the grouting screw anchor reaches the designed penetration depth, and ensure that the grouting screw anchor provides sufficient uplift bearing capacity for the floating marine structure.

[0020] Furthermore, on the seabed within 50 meters, the present invention can be directly placed at the designated position; when the seabed is more than 50 meters and accurate placement is not possible, use the pile driving system to place it accurately; the rotational acceleration paddle of the pile driving system is steered by remote control to meet the clockwise and counterclockwise rotation of the grouting screw anchor; the vertical acceleration paddle of the pile driving system is equipped with four independently operating motors to control the descending direction of the shoal elevator and ensure that the device reaches the designated position accurately.

[0021] Furthermore, the grouting screw anchor is connected to the floating marine structure by a steel cable on the side; the fixed ring on the side of the shoal elevator is flexibly connected to the pile driving system through a ball bearing; during the pile driving operation, the vertical acceleration screw paddle controls the vertical position of the fixed ring by precisely adjusting the thrust; when the grouting screw anchor reaches the predetermined design depth, the control system activates a closed-loop adjustment mechanism to make the acceleration screw paddle generate a reverse thrust that balances the system gravity, so as to achieve stable hovering of the fixed ring at the target height. This design ensures the stability and positioning accuracy of the system during the pile driving process and realizes the automatic control of the construction process.

[0022] Compared with the prior art, the significant progress of the present invention lies in: 1) The present invention has "accurate positioning". The four-direction motors of the vertical acceleration paddle of the rotating pile driving system of the present invention can operate independently, enabling the anchoring base to accurately reach the predetermined installation location, greatly reducing the offset that may occur under the action of lateral loads such as waves and tides during the installation of traditional screw anchors in the ocean; 2) The present invention has "good pile formation". The grouting screw anchor of the present invention provides downward pressure through the vertical acceleration paddle of the pile driving system, and the rotational acceleration paddle provides rotational torque. At the same time, the pressure of the cement slurry is controlled by the engineering vessel to ensure that the grouting screw anchor reaches a sufficient penetration depth and the cement slurry reaches the designed thickness, providing sufficient uplift bearing capacity for the floating marine structure; 3) The present invention is "easy to control". The present invention controls the pile driving descent speed and rotational speed by remotely controlling the rotating pile driving system, making the invention highly flexible and applicable to different shallow foundation of the ocean.

[0023] To more clearly illustrate the functional characteristics and structural parameters of the present invention, the following further explains in conjunction with the drawings and specific embodiments. Description of the Drawings

[0024] The accompanying drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and the schematic embodiments and descriptions thereof are used to explain the present invention without unduly limiting the present invention. In the drawings:

[0025] Figure 1 is a schematic diagram of the overall appearance of the present invention;

[0026] Figure 2 is a schematic cross-sectional view of the rotary pile driving system;

[0027] Figure 3 is a schematic cross-sectional view of the present invention;

[0028] Figure 4 is a schematic diagram of the installation of the shoal elevator of the present invention;

[0029] Figure 5 is a schematic diagram of the fixed installation of the present invention;

[0030] Figure 6 is a schematic diagram of the formation of a grouting screw anchor pile of the present invention;

[0031] Figure 7 is a schematic diagram of the interior of the torpedo anchor installation equipment of the present invention;

[0032] The reference numerals in the drawings are: 1, floating platform; 2, vertical guide rail; 3, anchoring base; 4, grouting pipe; 5, rotary pile driving system; 6, fixed screw anchor; 7, fixed bracket; 8, vertical acceleration paddle; 9, rotary acceleration paddle; 10, grouting screw anchor; 11, steel cable; 12, anchor eye. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] As Figures 1 - 3 shown, a shoal elevator suitable for the installation of a grouting screw anchor includes a floating platform 1, a vertical guide rail 2, an anchoring base 3, a grouting pipe 4, and a rotary pile driving system 5; four vertical guide rails 2 are connected to the lower part of the floating platform 1, the rotary pile driving system 5 is fixed in direction through the vertical guide rail 2, the lower part of the vertical guide rail 2 is connected to the anchoring base 3, and four fixed screw anchors 6 are connected to the lower part of the anchoring base 3; the rotary pile driving system 5 is provided with a grouting screw anchor 10, and the grouting pipe 4 is connected to the grouting screw anchor 10. The fixed screw anchor 6 at the bottom of the anchoring base 3 is screwed into the anchoring seabed to fix the anchoring base 3 at the designated installation location to complete the installation of the shoal elevator.

[0035] Specifically, in one embodiment, the rotary pile driving system 5 includes a fixed support 7, a vertical acceleration paddle 8, a rotary acceleration paddle 9, and a grouting screw anchor 10; the fixed support 7 is composed of an embedded ball bearing, a steel support connection platform, and a grouting hole; the fixed support 7 is composed of steel support connection platforms in the four directions of east, south, west, and north. The outermost end of the steel support connection platform is connected to a steel support hole for placing the vertical acceleration paddle 8. The outer area in the middle of the steel support connection platform is composed of a roller bearing, and the inner side of the roller bearing is connected to the vertical guide rail 2. The middle part of the fixed support is the elevator connection and the area where the grouting hole is located; the fixed support 7 is connected to the vertical acceleration paddle 8 by welding. The vertical acceleration paddle 8 is fixed in the steel support hole. When the entire rotary pile driving system needs to move in the vertical direction, the vertical acceleration paddle 8 is energized to provide a downward acceleration, causing the entire part of the fixed support 7 to move downward. The embedded ball bearing makes it easier for the overall component to slide downward or upward; the fixed support 7 and the grouting pipe 4 are connected by a leather plug. When grouting is required, an underwater robot is used to connect the grouting pipe 4 to the grouting hole to complete the grouting process; the grouting screw anchor 10 includes a sensor, a spiral blade, and a steel pipe; an anchor eye 12 is provided at the uppermost steel pipe of the grouting screw anchor 10 for connecting to a chain; the grouting screw anchor 10 is a steel pipe and a pile tip from top to bottom. The steel pipe is surrounded by spiral blades on all sides, and there is a sensor on the side of the bottom pile body to detect the distance from the pile tip to the ground, used to determine the corresponding position of the pile; when loosening the seabed soil, the rotary pile driving system 5 starts to work. When the pile tip of the grouting screw anchor 10 touches the seabed soil, the engineering ship pressurizes the cement slurry to the grouting screw anchor 10 through the grouting pipe 4; when the grouting screw anchor 10 reaches the designed burial depth, the rotary pile driving system 5 disconnects from the grouting screw anchor 10, and the fixed spiral anchor 6 at the bottom of the anchoring base 3 is screwed out of the anchored seabed, pulling out the shoal elevator from the seabed for repeated use.

[0036] Specifically, in one embodiment, the steel cable 11 passes through the steel cable channel anchor eye 12 and is fixed to the side of the grouting screw anchor 10.

[0037] Specifically, in one embodiment, after being put into the sea from the engineering ship, the direction of the shoal elevator is controlled by the vertical acceleration paddle 8 to make the equipment reach the seabed surface; when the engineering ship vertically throws the shoal elevator into the sea, the entire component moves downward under the action of gravity. When the shoal elevator enters the water, the vertical acceleration paddle 8 is energized to make the vertical acceleration paddle 8 rotate, pushing the shoal elevator downward. After the anchoring base 3 touches the bottom, the sensor of the grouting screw anchor 10 measures its distance from the bottom seabed position, used to judge the corresponding position of the pile.

[0038] Specifically, in one embodiment, the lower part of the anchoring base 3 is connected to the screw anchor. When the sensor of the grouting screw anchor 10 feeds back that its distance from the bottom seabed is in a "long-term slow change", it means that different standards are set for different seabed conditions. When it is a soft seabed, the sensor measures the change value of its distance from the bottom seabed, and the stabilization time should be controlled within 30 - 90 minutes. When it is a medium-hard seabed, the sensor measures the change value of its distance from the bottom seabed, and the stabilization time should be controlled within 15 - 45 minutes. When it is a hard seabed, the sensor measures the change value of its distance from the bottom seabed, and the stabilization time should be controlled within 8 - 15 minutes. After the sensor measures that the change value of its distance from the bottom seabed is stable, it indicates that the anchoring base 3 has reached the seabed, and the remote control grouting screw anchor 10 is rotated into the seabed; by increasing the power of the electric motor, the vertical acceleration paddle 8 and the rotary acceleration paddle 9 are accelerated to rotate, so that the pile enters the seabed soil and the real-time piling situation is detected through the sensor.

[0039] Specifically, in one embodiment, after the rotary piling system 5 touches the seabed, the distance is detected by the grouting screw anchor 10. After the bottom of the anchoring base 3 is fixed on the seabed surface, the power of the motor of the vertical acceleration paddle 8 is increased, so that the vertical acceleration paddle 8 provides a downward acceleration, and the upward and downward speeds of the vertical acceleration paddle 8 can be remotely controlled on the engineering ship; the rotary acceleration paddle 9 can provide torque for the grouting screw anchor 10, and through the forward and reverse rotation of the vertical acceleration paddle 8 and the rotary acceleration paddle 9, the rotation direction and the rotation speed can be remotely controlled on the engineering ship.

[0040] As Figures 4 - 7 shown, a method for using a shoal elevator suitable for the installation of a grouting screw anchor includes the following steps:

[0041] Step 1: After the anchoring base is hoisted under the floating platform and kept vertically suspended, it quickly reaches the designated position by relying on free fall and the acceleration of the vertical propeller.

[0042] Step 2: After the floating platform reaches the designated location, the anchoring base is accurately reached at the predetermined installation location by remotely controlling the vertical acceleration paddle. The screw anchor fixed at the bottom of the anchoring base is screwed into the anchoring seabed to fix the anchoring base at the designated installation location to complete the installation of the shoal elevator.

[0043] Step 3: The rotary piling system is hoisted under the floating platform through the vertical guide rail and kept vertically suspended and released. The tip of the grouting screw anchor reaches the seabed by remotely controlling the rotary piling system.

[0044] Step 4: When the tip of the grouting screw anchor reaches the seabed, start grouting remotely on the engineering ship. While grouting, the pile driving system rotates to work. The vertical acceleration paddle provides downward acceleration, and the rotational acceleration paddle provides the rotational torque of the grouting screw anchor. Ensure that the grouting screw anchor reaches the designed penetration depth to ensure that the grouting screw anchor provides sufficient uplift bearing capacity for the floating marine structure.

[0045] Specifically, in one embodiment, on the seabed within 50 meters, the present invention can be directly placed at the designated position; when the seabed is more than 50 meters and accurate placement is not possible, use the rotary pile driving system to place it in the accurate position; the rotational acceleration paddle of the rotary pile driving system is steered by remote control to meet the clockwise and counterclockwise rotations of the grouting screw anchor; the vertical acceleration paddle of the rotary pile driving system is equipped with four independently operating motors to control the descending direction of the shoal elevator to ensure that the device accurately reaches the designated position.

[0046] Specifically, in one embodiment, the grouting screw anchor is connected to the floating marine structure by a steel cable on the side; the fixed ring on the side of the shoal elevator is flexibly connected to the rotary pile driving system through a ball bearing; during the pile driving operation, the vertical acceleration screw propeller controls the vertical position of the fixed ring by precisely adjusting the thrust; when the grouting screw anchor reaches the predetermined design depth, the control system starts a closed-loop adjustment mechanism to make the acceleration screw propeller generate a reverse thrust that balances the system gravity, so as to achieve the stable hovering of the fixed ring at the target height. This design ensures the stability and positioning accuracy of the system during the pile driving process and realizes the automatic control of the construction process.

[0047] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shallow elevator applicable to the installation of grouting screw anchors, characterized in that, It includes a floating platform (1), vertical guide rails (2), an anchoring base (3), a grouting pipe (4), and a rotary pile driving system (5); four vertical guide rails (2) are connected to the lower part of the floating platform (1), the rotary pile driving system (5) is fixed in direction through the vertical guide rails (2), the lower part of the vertical guide rails (2) is connected to the anchoring base (3), and four fixed screw anchors (6) are connected to the lower part of the anchoring base (3); the rotary pile driving system (5) is provided with a grouting screw anchor (10), and the grouting pipe (4) is connected to the grouting screw anchor (10).

2. The shallow elevator applicable to the installation of grouting screw anchors according to claim 1, characterized in that, The fixed screw anchors (6) at the bottom of the anchoring base (3) are screwed into the anchoring seabed to fix the anchoring base (3) at the designated installation location to complete the installation of the shoal elevator.

3. A shallow elevator applicable to the installation of grouting screw anchors according to claim 1, characterized in that, The rotary pile driving system (5) includes a fixed bracket (7), a vertical accelerating paddle (8), a rotary accelerating paddle (9), and a grouting screw anchor (10); the fixed bracket (7) is composed of an embedded ball bearing, a steel bracket connecting the platform and a grouting hole; the fixed bracket (7) is composed of steel brackets connecting the platform in the four directions of east, south, west, and north. The outermost end of the steel bracket connecting the platform is connected to a steel bracket hole for placing the vertical accelerating paddle (8). The middle and outer area of the steel bracket connecting the platform is composed of a roller bearing. The inner side of the roller bearing is connected to the vertical guide rail (2). The middle part of the fixed bracket is the elevator connection part and the area where the grouting hole is located; The fixed bracket (7) is connected to the vertical accelerating paddle (8) by welding. The vertical accelerating paddle (8) is fixed in the steel bracket hole. When the entire rotary pile driving system needs to move in the vertical direction, the vertical accelerating paddle (8) is energized to provide a downward acceleration, so that the entire part of the fixed bracket (7) moves downward. The embedded ball bearing makes it easier for the overall component to slide downward or upward; The fixed bracket (7) and the grouting pipe (4) are connected by a leather plug. When grouting is required, an underwater robot is used to connect the grouting pipe (4) to the grouting hole to complete the grouting process; the grouting screw anchor (10) includes a sensor, a spiral blade, and a steel pipe; an anchor eye (12) is provided at the uppermost steel pipe of the grouting screw anchor (10) for connecting with a chain; the grouting screw anchor (10) is a steel pipe and a pile tip from top to bottom. The steel pipe is surrounded by spiral blades on all sides, and a sensor for detecting the distance from the pile tip to the ground is provided on the side of the bottom pile body to determine the corresponding position of the pile; When loosening the seabed soil, the rotary pile driving system (5) starts to work. When the pile tip of the grouting screw anchor (10) touches the seabed soil, the engineering ship pressurizes the cement slurry to the grouting screw anchor (10) through the grouting pipe (4); when the grouting screw anchor (10) reaches the designed burial depth, the rotary pile driving system (5) is disconnected from the grouting screw anchor (10), and the fixed screw anchors (6) at the bottom of the anchoring base (3) are screwed out of the anchoring seabed to pull the shoal elevator out of the seabed for repeated use.

4. A shoal elevator applicable to the installation of grouting screw anchors according to claim 1, characterized in that, The steel cable (11) passes through the cable channel anchor eye (12) and is fixed to the side of the grouting screw anchor (10).

5. A shallow elevator applicable to the installation of grouting screw anchors according to claim 3, characterized in that, After the engineering ship is put into the sea, the direction of the shoal elevator is controlled by the vertical acceleration paddle (8) to make the equipment reach the seabed surface; when the engineering ship vertically throws the shoal elevator into the sea, the whole component moves downward under gravity. When the shoal elevator enters the water, the vertical acceleration paddle (8) is electrified to make the vertical acceleration paddle (8) rotate, pushing the shoal elevator downward. After the anchoring base (3) touches the bottom, the grouting screw anchor (10) sensor measures its distance from the bottom seabed to judge the corresponding position of the pile.

6. A shoal elevator applicable to the installation of grouting screw anchors according to claim 3, characterized in that, The lower part of the anchoring base (3) is connected to the screw anchor. After the grouting screw anchor (10) sensor feeds back that its distance from the bottom seabed is slowly changing for a long time, it indicates that the anchoring base (3) has reached the seabed, and the grouting screw anchor (10) is remotely controlled to rotate into the seabed; the power of the electric motor is increased to make the vertical acceleration paddle (8) and the rotary acceleration paddle (9) rotate at an accelerated speed, so that the pile enters the seabed soil and the real-time piling situation is detected by the sensor.

7. A shoal elevator applicable to the installation of grouting screw anchors according to claim 6, characterized in that, After the rotary piling system (5) touches the seabed, the distance is detected by the grouting screw anchor (10). After the bottom of the anchoring base (3) is fixed on the seabed surface, the power of the motor of the vertical acceleration paddle (8) is increased to make the vertical acceleration paddle (8) provide a downward acceleration, and the upward and downward speeds of the vertical acceleration paddle (8) can be remotely controlled on the engineering ship; the rotary acceleration paddle (9) can provide torque for the grouting screw anchor (10), and through the forward and reverse rotation of the vertical acceleration paddle (8) and the rotary acceleration paddle (9), the rotation direction and rotation speed can be remotely controlled on the engineering ship.

8. A method for using a shoal elevator applicable to the installation of grouting screw anchors, the method being based on the shoal elevator according to any one of claims 1-7, characterized in that, It includes the following steps: Step 1: After the anchoring base is hoisted under the floating platform and kept vertically suspended, it quickly reaches the designated position by relying on free fall and the acceleration of the vertical propeller; Step 2: After the floating platform reaches the designated location, the anchoring base is accurately reached at the predetermined installation location by remotely controlling the vertical acceleration paddle. The screw anchor fixed at the bottom of the anchoring base is screwed into the anchoring seabed to fix the anchoring base at the designated installation location to complete the installation of the shoal elevator; Step 3: The rotary piling system is hoisted under the floating platform through the vertical guide rail and kept vertically suspended and released. The tip of the grouting screw anchor is made to reach the seabed by remotely controlling the rotary piling system; Step 4: When the tip of the grouting screw anchor reaches the seabed, grouting is remotely started on the engineering ship. While grouting, the rotary piling system works. The vertical acceleration paddle provides a downward acceleration, and the rotary acceleration paddle provides the rotational torque of the grouting screw anchor; ensure that the grouting screw anchor reaches the designed penetration depth and ensure that the grouting screw anchor provides sufficient uplift bearing capacity for the floating offshore structure.

9. A method for using a shoal elevator applicable to the installation of grouting screw anchors according to claim 8, characterized in that, On the seabed within 50 meters, the present invention can be directly placed at the designated position; when the seabed is more than 50 meters and it cannot be accurately placed, the rotary piling system is used to place it at the accurate position; the rotary acceleration paddle of the rotary piling system is steered by remote control to meet the clockwise and counterclockwise rotation of the grouting screw anchor; the vertical acceleration paddle of the rotary piling system is equipped with four independently operating motors to control the descending direction of the shoal elevator and ensure that the device accurately reaches the designated position.

10. A method for using a shallow elevator applicable to the installation of grouting screw anchors according to claim 8, characterized in that, The grouting screw anchor is connected to the floating offshore structure by a steel cable on the side; the fixed ring on the side of the shoal elevator is flexibly connected to the rotary pile driving system through a ball bearing; during the pile driving operation, the vertical accelerating propeller controls the vertical position of the fixed ring by precisely adjusting the thrust; when the grouting screw anchor reaches the predetermined design depth, the control system activates the closed-loop adjustment mechanism to make the accelerating propeller generate a reverse thrust that balances the system gravity, so as to achieve the stable hovering of the fixed ring at the target height.

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