Construction method for reducing underwater adsorption force of anti-sinking plate of bottom-supported guide frame

Abstract

The invention discloses a construction method for reducing underwater adsorption force of an anti-sinking plate of a bottom-supported guide frame, belongs to the technical field of offshore wind power plant construction and bridge construction, and aims to solve the technical problems that in the prior art, the adsorption force between the anti-sinking plate and a seabed mud surface is too large, so that a guide frame is difficult to move, and the construction efficiency is low. According to the method, the desilting depth is determined through early-stage accurate measurement, then the desilting equipment is hoisted to a designated position through the sling with the fixed length to carry out desilting operation, and a ditch with the proper width and depth is formed in the edge of the anti-sinking plate to release adsorption force; and after desilting is completed, a high-pressure water gun is used for comprehensively and thoroughly flushing the anti-settling plate, the integrity of the silt is damaged, and the adsorption capacity is further reduced. The device is used for rapidly reducing the underwater adsorption force of the anti-sinking plate, the displacement efficiency of the guide frame is effectively improved, the overall construction progress is accelerated, the construction cost is reduced, and meanwhile the construction safety is enhanced.

Description

Technical Field

[0001] The present invention relates to foundation construction technology in the field of offshore wind farm construction and bridge construction, and in particular to a construction method for reducing the underwater adsorption force of a bottom-mounted guide frame anti-sinking plate. Background Art

[0002] During the construction of offshore wind farms, foundation construction technology, a critical step in wind farm construction, requires high technical requirements and involves complex processes. The bottom-supported guide frame, a commonly used auxiliary pile driving equipment, plays a vital role in offshore foundation construction. The bottom-supported guide frame primarily consists of a main structure, a guide system, auxiliary piles, and anti-sinking plates. During operation, the anti-sinking plates stabilize the frame on the seabed, providing a stable working platform for subsequent pile driving operations.

[0003] However, during the use of a bottom-mounted guide frame, adsorption forces develop between the anti-sinking plate and the seabed mud surface. This is due to the viscosity of the seabed mud and the hydrodynamic effects. As the operation time at a single position increases, the adsorption forces between the anti-sinking plate and the seabed mud surface gradually increase due to factors such as waves, currents, and siltation. This increased adsorption force can make it difficult to lift the guide frame when it needs to be moved, thus affecting construction progress and efficiency.

[0004] Currently, the industry's commonly used solution to the problem of excessive adsorption between the anti-sinking plates and the seabed mud surface is to install a pile system at the bottom of the anti-sinking plates to reduce the adsorption force by flushing the silt at the bottom of the plates. However, this method suffers from poor treatment effects and low efficiency, making it difficult to meet the needs of quickly reducing adsorption force and improving displacement efficiency. Specifically, when flushing silt, the pile system may not completely reduce the adsorption force due to incomplete flushing or a limited flushing range. At the same time, the flushing process is time-consuming, affecting the overall construction progress.

[0005] For example, CN113734948A discloses an underwater guide frame anti-sinking structure, in which pile pipe sleeves are vertically installed at the four corners of the frame, and the lower part of the pile pipe sleeves is movably fitted with an anti-sinking plate. The top end of the high-pressure water pipe is connected to the high-pressure water source device of the offshore construction vessel. The tail end of the high-pressure water pipe is diverted through a metal bellows and connected to the spray branch pipe, which is fixed to the anti-sinking plate via a mounting frame. Although this solution uses water flow to spray the sea mud at the bottom of the anti-sinking plate, making it loose and unable to adhere to the bottom surface of the anti-sinking plate to form a sealed space and generate adsorption force, this solution has problems such as high structural complexity and strong dependence on material properties, resulting in low construction efficiency, poor treatment effect, and low reliability.

[0006] Therefore, in order to quickly reduce the adsorption force between the anti-sinking plate and the seabed mud surface, improve the displacement efficiency of the bottom-supported guide frame, and accelerate the construction progress, it is urgent to develop a more efficient and reliable construction method. This invention is based on this need and proposes a construction method for reducing the underwater adsorption force of the anti-sinking plate of the bottom-supported guide frame. It aims to solve the problems existing in the existing technology, improve construction efficiency, shorten the construction period, and reduce construction costs. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a construction method for reducing the underwater adsorption force of the anti-sinking plate of a bottom-mounted guide frame, so as to solve the problem that in fields involving the application of bottom-mounted guide frames such as offshore wind farm construction and bridge construction, the excessive adsorption force generated between the anti-sinking plate and the seabed mud surface is a key problem affecting construction efficiency and safety. The method overcomes the limitations of poor processing effect and low efficiency in the existing technology, so as to realize rapid and safe displacement of the guide frame, thereby improving overall construction efficiency and reducing costs.

[0008] In order to achieve the above objectives, the present invention adopts the following technical solutions: The present invention provides a construction method for reducing the underwater adsorption force of the anti-sinking plate of a bottom-mounted guide frame. The method includes a series of carefully designed steps to ensure that the dredging operation is completed efficiently and safely, thereby reducing the adsorption force between the anti-sinking plate and the seabed mud surface. Specifically, the method first involves the positioning of the guide frame and the preparation of the sling. By measuring the elevation difference between the top surface of the guide frame platform and the seabed surface, a fixed-length sling with sufficient operating space is selected for the subsequent lifting of the underwater dredging equipment. Next, the dredging equipment is marked and the reference point is set. According to the height of the dredging equipment, the control reference point of the dredging depth is accurately marked on the sling to ensure the accuracy and effectiveness of the dredging operation.

[0009] During the dredging equipment positioning phase, divers explore and determine the exact location of the anti-sinking plate. A crane then precisely lowers the dredging equipment to the designated location using fixed-length slings. Subsequently, dredging operations are carried out on one side. The dredging equipment is lowered to the seabed, and its depth is controlled based on pre-set reference points. The dredging equipment is then moved horizontally to complete dredging on one side, forming the necessary trench. This process is repeated until dredging is completed on the remaining sides of the guide frame.

[0010] After desilting is complete, high-pressure water jets are used to thoroughly flush the silt from the top and bottom of the anti-sinking plates, disrupting their integrity and further reducing their adsorption capacity. During the flushing process, the high-pressure water jets are applied in a symmetrical sequence to prevent the plates from shifting due to uneven force. Furthermore, the flushing pressure and flow rate can be flexibly adjusted according to actual needs to ensure a deep and effective flushing of the bottom silt.

[0011] This method also includes a series of optimized solutions to improve operational quality and efficiency. For example, a detailed geological survey is conducted before dredging operations to determine optimal operating parameters and plans; the operating status and effectiveness of the dredging equipment are monitored in real time during the operation to ensure operational quality; and after the operation is completed, the anti-sinking plate and surrounding seabed are inspected to ensure that the adsorption force has been effectively reduced and the requirements for guide frame displacement have been met. Through these measures, the present invention not only improves the efficiency of adsorption force reduction operations, but also significantly shortens the construction period and saves construction costs.

[0012] The present invention provides a construction method for reducing the underwater adsorption force of a bottom-mounted guide frame anti-sinking plate, which has the following beneficial effects: 1. The present invention effectively solves the key problem of excessive adsorption force between the anti-sinking plate and the seabed mud surface affecting construction efficiency and safety in fields involving the application of bottom-mounted guide frames such as offshore wind farm construction and bridge construction.

[0013] 2. The present invention overcomes the limitations of the existing technology in dealing with the underwater adsorption force problem of anti-sinking plates, such as poor treatment effect and low efficiency, and realizes the rapid and safe displacement of the guide frame, thereby improving the overall construction efficiency and reducing costs.

[0014] 3. The present invention combines professional dredging equipment with high-pressure water guns to achieve rapid and effective reduction of the underwater adsorption force of the anti-sinking plate, significantly improving construction efficiency and shortening the construction period.

[0015] 4. The present invention uses professional silt removal equipment to remove silt from the edge of the anti-sinking plate, and uses a high-pressure water gun to flush the silt at the bottom of the anti-sinking plate, effectively destroying the integrity of the silt, quickly reducing the adsorption force of the anti-sinking plate, and improving the efficiency of the adsorption force reduction operation.

[0016] 5. The present invention adopts a high-pressure water gun to flush the silt on the top of the anti-sinking plate, thereby reducing the thickness of the covering silt on the top of the anti-sinking plate and reducing the top load of the anti-sinking plate. In combination with the flushing of the bottom silt of the anti-sinking plate, the adsorption force reduction efficiency of the anti-sinking plate is further improved, thereby speeding up the construction speed.

[0017] 6. The implementation of the method of the present invention reduces the idle time of ship machinery and equipment, reduces construction costs, and improves the economic benefits of the project.

[0018] 7. The present invention enhances the safety during the construction process by reducing the underwater operation time, while reducing the idle labor costs and further saving the construction cost.

[0019] 8. The present invention addresses working conditions where the guide frame is detained for a long time, the anti-sinking plate is severely covered by silt and the adsorption force far exceeds the design. It can quickly reduce the adsorption force of the anti-sinking plate, speed up the platform shifting speed, thereby shortening the construction period and indirectly reducing the construction cost.

[0020] 9. The present invention determines the fixed length of the sling through precise measurement and calculation, thereby achieving precise positioning and lifting of the dredging equipment underwater and improving the operation accuracy.

[0021] 10. The present invention sets multiple reference points on the sling, and controls the height of the dredging equipment to different reference points, thereby achieving precise control of the dredging depth and ensuring the dredging effect.

[0022] 11. The present invention not only flushes the silt on the surface of the anti-sinking plate, but also flushes the edge and bottom of the anti-sinking plate. The symmetrical flushing principle is adopted to more effectively destroy the integrity of the silt.

[0023] 12. In view of the complex geological conditions, the present invention proposes adaptive adjustment measures such as increasing the length of the slings and taking enhanced dredging operations, thereby improving the flexibility and effectiveness of the construction method.

[0024] 13. The adaptive adjustment measures proposed by the present invention for complex geological conditions enable the construction method to adapt to a wider range of construction environments and needs, thereby improving the applicability and flexibility of the construction method.

[0025] 14. The present invention reduces underwater operation time, thus enhancing the safety during the construction process and providing a strong guarantee for the life safety of construction workers.

[0026] 15. The present invention ensures the construction quality and the safe lifting and displacement of the guide frame through a strict quality inspection and acceptance process, thereby improving the reliability and safety of the construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 It is a schematic elevation view of the bottom-supported guide frame of the present invention; Figure 2 A schematic diagram of the arrangement of the sling marker of the present invention; Figure 3 This is a construction drawing of step 3 of reducing the adsorption force of the anti-sinking plate of the present invention; Figure 4 The construction drawings of steps 4 and 5 for reducing the adsorption force of the anti-sinking plate of the present invention; Figure 5 A schematic plan view of the dredging range outside the anti-sinking plate of the present invention; Figure 6 These are construction drawings of steps 6 and 7 for reducing the adsorption force of the anti-sinking plate of the present invention.

[0028] In the figure: guide frame 1, seabed surface 2, sling 3, dredging equipment 4, anti-sinking plate 5, crane 6, ditch 7, high-pressure water gun 8, first reference point 9, second reference point 10, third reference point 11. DETAILED DESCRIPTION

[0029] The technical solutions of the present invention are further described below with reference to the accompanying drawings and embodiments: Example 1 like Figures 1 to 6 As shown, this embodiment provides a construction method for reducing the underwater adsorption force of the anti-sinking plate of the bottom-mounted guide frame, and the specific steps are as follows: Step 1: Guide frame positioning and sling preparation Measurement and calculation: First, accurately measure the elevation of the top surface of the guide frame 1 platform and the seabed 2 to determine the height difference between the two. Based on this height difference, select the appropriate length of the fixed sling 3. The length of the sling 3 should be set to the height difference plus a certain safety margin to ensure that the dredging equipment 4 has sufficient operating space during operation to avoid collision with the seabed or the guide frame 1. Inspection of sling 3: Carefully inspect the selected sling 3 to ensure that it has no safety hazards such as wear and tear and breakage, to ensure the safety and reliability of the lifting process.

[0030] Step 2: 4 marking and benchmark setting of dredging equipment Equipment height measurement: Measure the overall height of the dredging equipment 4 to provide data support for subsequent benchmark setting; Benchmark mark: On the sling 3, three key benchmark points are accurately marked according to the height of the dredging equipment 4 and the expected dredging depth: the first benchmark point 3 is the point where the height difference between the top surface of the guide frame 1 platform and the seabed surface 2 is greater than the height difference between the dredging equipment 4, which serves as a reference for the start of dredging; the second benchmark point 10 and the third benchmark point 11 are set above and below the first benchmark point 9 respectively, and the height difference between them is determined according to the actual dredging needs, which serves as the basis for controlling the dredging depth.

[0031] Step 3: Positioning of dredging equipment 4 Determine the position of the anti-sinking plate 5: Experienced divers dive to the operation area and determine the specific position of the anti-sinking plate 5 by exploration; Equipment hoisting into place: The crane 6 slowly and steadily lifts the dredging equipment 4 to the position designated by the diver through a fixed-length sling 3, ensuring that the dredging equipment 4 can be accurately aligned with the edge of the anti-sinking plate 5, preparing for subsequent dredging operations.

[0032] Step 4: Unilateral dredging operation Equipment lowering and alignment with reference points: The dredging equipment 4 is lowered to the seabed surface 2 and its position is adjusted so that the first reference point 9 is flush with the top surface of the guide frame 1 platform, which serves as the starting point for the dredging operation; Execution of dredging operation: Start the dredging equipment 4 and dredge according to the preset dredging depth (i.e., the distance from the first reference point 9 to the third reference point 11) until the third reference point 11 is flush with the top surface of the guide frame 1 platform, completing the dredging at this depth; Equipment hooking and horizontal movement: After dredging to the third reference point 11, the dredging equipment 4 is lifted to the second reference point 10 and flush with the top surface of the guide frame 1 platform, and then the dredging equipment 4 is moved horizontally to the next working position. The above dredging process is repeated until the dredging of the single-side area is completed and the necessary ditch 7 is formed to facilitate the smooth shifting of the subsequent guide frame 1.

[0033] Step 5: Repeat dredging Process cycle: Repeat Step 2 to Step 3 to perform dredging operations on the remaining sides of the guide frame 1 to ensure that the seabed silt around the anti-sinking plate 5 is completely removed to reduce the adsorption force.

[0034] Step 6: Flushing Flushing with a high-pressure water gun 8: After the desilting operation is completed, the diver uses a high-pressure water gun 8 to thoroughly flush the residual silt on the top and bottom of the anti-sinking plate 5. During the flushing process, the symmetry principle is followed, and the process is carried out gradually from the edge of the anti-sinking plate 5 to the inside to avoid the anti-sinking plate 5 from shifting due to uneven force. Flushing parameter adjustment: According to actual needs, flexibly adjust the flushing pressure and flow of the high-pressure water gun 8 to ensure deep and effective flushing of the bottom silt, destroy the integrity of the silt, and further reduce the adsorption force.

[0035] Step 7: Lifting and acceptance of guide frame 1 Lifting operation: The crane 6 of the crane ship hooks the guide frame 1 and attempts to perform the lifting operation; Checking the adsorption force and repeating the flushing: If resistance is encountered during the lifting process, it indicates that the adsorption force has not been completely reduced. In this case, it is necessary to repeat Step 6, that is, flush again with the high-pressure water gun 8 until the guide frame 1 can be lifted and shifted smoothly.

[0036] Quality inspection: After the guide frame 1 is moved, the anti-sinking plate 5 and the surrounding seabed are inspected to ensure that the adsorption force has been effectively reduced and meets the requirements for subsequent construction.

[0037] In addition, to ensure the smooth progress of the entire construction process and the quality of the work, the present invention also includes the following preferred measures: Geological survey: Before dredging operations, a detailed geological survey of the construction area is conducted to understand the geological conditions of the seabed, silt distribution and properties, etc., to provide a scientific basis for determining the specific parameters and plans of the dredging operation.

[0038] Real-time monitoring: During the dredging operation, advanced monitoring equipment and technical means are used to monitor the operating status and dredging effect of the dredging equipment in real time, promptly identify and deal with potential problems, and ensure the quality and efficiency of the dredging operation.

[0039] Safety protection: During the entire construction process, strictly abide by safety operating procedures and take necessary safety protection measures to ensure the personal safety of workers and the integrity of construction equipment.

[0040] In summary, the present invention forms a complete, efficient and safe construction method for reducing the underwater adsorption force of the anti-sinking plate of the bottom-mounted guide frame through a series of carefully designed steps and preferred measures.

[0041] Example 2 In another preferred embodiment, based on the above-mentioned embodiment 1, this embodiment provides a construction method for reducing the underwater adsorption force of the bottom-supported guide frame anti-sinking plate in a conventional sea environment according to the present invention. The method includes the following steps to ensure the efficiency and accuracy of the construction: 1. Measurement and sling selection In a conventional marine environment, the top elevation H1 of the guide frame 1 platform is first accurately measured using high-precision measuring instruments. Simultaneously, based on the known seabed 2 elevation H2, the height L1 = H1 - H2 from the top of the guide frame 1 platform to the seabed 2 is calculated. Based on this height L1, a sling 3 with a fixed length of L2 = L1 + 10m is selected for the subsequent underwater dredging operation, which will be used to hoist the dredging equipment 4.

[0042] 2. Desilting equipment 4 height measurement and benchmark setting Use a measuring tool to measure the height L3 of the dredging equipment 4. Then, pre-mark the selected sling 3 and determine three key reference points: the first reference point 9 is located at the length L1-L3. That is, when the dredging equipment 4 is lowered to the seabed 2, the first reference point 9 should be at the same height as the top surface of the guide frame 1 platform; the second reference point 10 is located 2 meters below the first reference point 9 and serves as a reference point when the dredging equipment 4 is hooked; the third reference point 11 is located 2 meters above the first reference point 9 and serves as the lower limit of the dredging depth.

[0043] 3. Diver exploration and dredging equipment 4 positioning The diver, equipped with the necessary diving equipment, enters the water and, upon reaching the seabed 2, confirms the top and edge positions of the anti-sinking plate 5 by feel. Subsequently, the crane 6 uses a fixed-length sling 3 to lift the dredging equipment 4. Under the diver's underwater guidance, the dredging equipment 4 is slowly and steadily lowered to the planned dredging location, ensuring that it is accurately aligned with the edge of the anti-sinking plate 5.

[0044] 4. Unilateral dredging operation When the dredging equipment 4 is lowered to the seabed surface 2, its position is adjusted so that the first reference point 9 on the sling 3 is at the same height as the top surface of the guide frame 1 platform. Start the dredging equipment 4 to start the operation, and slowly dredge downwards until the third reference point 11 is at the same height as the top surface of the guide frame platform 1. At this time, the dredging depth is about 2m below the anti-sinking plate 5. After completing the dredging at this depth, the crane 6 is hooked so that the second reference point 10 on the sling 3 is at the same height as the top surface of the guide frame 1 platform. At this time, the dredging equipment 4 is higher than the mud surface. Subsequently, the dredging equipment 4 is moved horizontally to the next position. The single movement distance must ensure that the overlapping range of the cleaning area is not less than 0.5m and the cleaning width is not less than 2m. Continue the dredging operation according to the above process until the dredging operation within the single side of the guide frame 1 is completed, forming a ditch 7 with a width of 2m and a depth of 2m.

[0045] 5. Repeated dredging operations Repeat steps 2 and 3 to complete the dredging operation on the side areas of the remaining guide frames 1 in sequence, ensuring that the seabed silt around the anti-sinking plates 5 is completely removed.

[0046] 6. High-pressure water gun 8 flushing operation After the silt around the guide frame 1 is cleared, the diver uses a high-pressure water gun 8 underwater to first flush the silt that has accumulated on the anti-sinking plate 5, and then flushes the silt on the bottom of the anti-sinking plate 5 inward along the edge of the anti-sinking plate 5. During the flushing process, the silt on the four sides of the anti-sinking plate 5 is flushed in sequence, following the principle of symmetry, thereby destroying the integrity of the silt and reducing its adsorption force.

[0047] 7. Lifting and acceptance of guide frame 1 The crane 6 of the crane vessel hooks the guide frame 1 and begins lifting. If resistance is encountered during the lifting process, it indicates that the suction force has not been completely reduced. In this case, repeat step 6 and continue to flush with the high-pressure water gun 8 until the guide frame 1 can be lifted and moved smoothly. After the guide frame 1 is moved, the anti-sinking plate 5 and the surrounding seabed are inspected to confirm that the suction force has been effectively reduced.

[0048] Example 3 In another preferred embodiment, based on the above-mentioned embodiments 1 and 2, this embodiment describes a construction method of the present invention for reducing the underwater adsorption force of the anti-sinking plate of the bottom-mounted guide frame. The embodiment is safe and efficient under complex geological conditions. The details are as follows: 1. Geological survey and measurement adjustment In a geologically complex marine environment, a detailed geological survey was first conducted to understand the seabed's geological conditions, silt distribution, and properties. Based on the survey results, the top elevation H1 of the guide frame platform 1 and the elevation H2 of the seabed 2 were accurately measured, and the height L1 from the top of the guide frame platform 1 to the seabed 2 was calculated. Considering the potential uncertainty associated with the complex geological conditions, a sling 3 with a fixed length of L2 = L1 + 12m (a 2m safety margin compared to Example 1) was selected for the subsequent lifting of the dredging equipment 4 during underwater dredging operations.

[0049] 2. Dredging equipment height measurement and benchmark setting As in Example 1, the height L3 of the dredging equipment 4 is measured, and marks are set on the sling 3 to determine the positions of the first reference point 9, the second reference point 10, and the third reference point 11. However, in complex geological conditions, it may be necessary to fine-tune the reference points according to actual conditions to ensure the accuracy and effectiveness of the dredging operation.

[0050] 3. Diver exploration and special positioning After entering the water, divers must not only explore and confirm the top surface and edge position of the anti-sinking plate 5, but also pay special attention to observing geological changes in the surrounding seabed, such as the hardness and distribution of the silt. When positioning the dredging equipment 4, special measures may be required, such as using auxiliary equipment such as underwater cameras to ensure that the dredging equipment 4 can accurately align with the edge of the anti-sinking plate 5 and adapt to complex geological conditions.

[0051] 4. Unilateral dredging operation During the dredging process, in response to complex geological conditions, enhanced dredging operations may be required. For example, in areas where the silt layer is hard or unevenly distributed, the power of the dredging equipment 4 can be increased, the angle of the dredging tool can be adjusted, or special dredging techniques can be used to ensure the dredging effect. At the same time, pay close attention to the operating status and dredging effect of the dredging equipment 4, and adjust the dredging parameters and operating methods in a timely manner. After completing the dredging at this depth, the hook is lifted and the dredging equipment 4 is moved horizontally to the next position according to the method in Example 1, and the dredging operation is continued until the dredging operation within the single side of the guide frame 1 is completed.

[0052] 5. Repeated dredging and local treatment Repeat steps 2 and 3 to complete the dredging operation for the remaining side areas of the guide frame 1. Under complex geological conditions, special treatment may be required for certain local areas, such as local flushing with a high-pressure water gun 8 and local crushing with tools such as a drill bit, to ensure the thoroughness of the dredging operation.

[0053] 6. High-pressure water gun 8 flushing and effect evaluation After desilting is complete around the guide frame 1, a comprehensive flushing operation is performed. During the flushing process, the flushing results are closely monitored, and the flushing parameters and operation methods are adjusted according to the actual situation. Especially in complex geological conditions, it may be necessary to increase the number of flushes or adjust the flushing angle to ensure that the silt under the anti-sinking plate 5 is completely removed. After the flushing is completed, the anti-sinking plate 5 and the surrounding seabed are inspected to assess the effectiveness of the adsorption reduction.

[0054] 7. Lifting and subsequent processing of guide frame 1 The crane vessel's crane 6 hooks the guide frame 1 and begins lifting. If resistance is encountered during the lifting process, the flushing or local treatment steps are repeated until the guide frame 1 can be smoothly lifted and repositioned. After the guide frame 1 is repositioned, the construction area is cleaned and restored, including the recovery of auxiliary equipment such as the sling 3, dredging equipment 4, and high-pressure water guns 8, as well as the disposal of waste generated during the construction process, to ensure proper protection of the marine environment.

[0055] In the preferred solution, the specific operation steps of Step 1 are to measure the elevation of the top surface of the guide frame 1 platform and the elevation of the seabed surface 2, the height from the top surface of the guide frame 1 platform to the seabed surface 2, and select a fixed-length sling 3 for hoisting the underwater dredging equipment 4; the above settings ensure that the length of the sling 3 is appropriate, which can not only stably suspend the underwater dredging equipment 4, but also facilitate operation and adjustment; then, the sling 3 is connected to the underwater dredging equipment 4, and accurately positioned through the guide frame 1, ready to implement the seabed dredging operation.

[0056] In the preferred solution, the length of the fixed-length sling 3 is the height from the top surface of the guide frame 1 platform to the seabed surface 2 plus a set margin to ensure that the dredging equipment has sufficient operating space; the above setting allows the sling to maintain stable suspension during the dredging operation, while avoiding accidental contact due to uneven seabed or equipment operation, thereby ensuring the safe and efficient implementation of the dredging operation.

[0057] In the preferred scheme, the specific operating steps of Step 2 for marking and setting the reference point of the dredging equipment 4 are to measure the height of the dredging equipment 4, set a mark on the sling 3, and define the point where the height difference between the top surface of the guide frame 1 platform and the seabed surface 2 and the height of the dredging equipment 4 is defined as the first reference point 9, and the points above and below which the heights are set are the second reference point 10 and the third reference point 11 respectively. The set height is the control reference for the dredging depth; the above settings ensure that during the dredging operation, the dredging equipment 4 is adjusted to the position of the second reference point 10 or the third reference point 11 through the sling 3 to achieve precise control of the dredging depth. At the same time, the first reference point 9 is used to verify the equipment height to ensure operation stability and accuracy.

[0058] In the preferred solution, the specific operation steps of Step 3 are: the diver explores the position of the anti-sinking plate 5, and the crane 6 lifts the dredging equipment 4 to the designated position through the fixed-length sling 3; after the above setting, the diver assists in fixing the dredging equipment 4 on the anti-sinking plate 5, and after ensuring that the equipment is stable, the dredging equipment 4 is started to operate, and at the same time, the crane 6 keeps the sling 3 taut to prevent the equipment from shifting during the dredging process.

[0059] In the preferred solution, the specific operation steps of Step 4 are: the dredging equipment 4 is lowered to the seabed surface 2, the first reference point 9 is flush with the top surface of the guide frame 1 platform, dredging is started until the third reference point 11 is flush with the top surface of the guide frame 1 platform, the hook is raised to the second reference point 10 is flush with the top surface of the guide frame 1 platform, and the dredging equipment 4 is moved horizontally to complete single-side dredging to form a ditch 7; the above settings can ensure that the dredging depth is uniform and precisely controlled, and then the dredging equipment 4 is adjusted to the other side, and the above operations are repeated until the entire area is dredged; during this period, the dredging progress and depth are monitored in real time through the monitoring system to ensure that the operation is efficient and meets the design requirements.

[0060] In the preferred solution, the specific operating steps of Step 6 are: after the dredging is completed, the diver uses a high-pressure water gun 8 to flush the silt on the top and bottom of the anti-sinking plate 5 to destroy the integrity of the silt; the above settings ensure that the surface of the anti-sinking plate 5 is clean and free of residue, and then the anti-sinking plate 5 is lifted by a crane and moved to the designated position for the next step of inspection and maintenance to ensure the smooth progress of subsequent construction.

[0061] In the preferred embodiment, the high-pressure water gun 8 flushes in a symmetrical sequence to prevent the anti-sinking plate 5 from shifting due to uneven force. This arrangement ensures efficient cleaning and the stability of the anti-sinking plate 5. Furthermore, the intelligent control system monitors the flushing intensity and progress in real time, adjusting the operating parameters of the high-pressure water gun 8 in a timely manner, further improving the safety and accuracy of the cleaning operation.

[0062] In the preferred solution, the flushing pressure and flow rate of the high-pressure water gun 8 are adjusted according to actual needs, and the bottom silt is deeply flushed inward along the edge of the anti-sinking plate 5 to ensure that the integrity of the silt is effectively destroyed and the adsorption force is further reduced; the above settings can significantly improve the dredging efficiency and quality; at the same time, the equipped silt collection device 10 immediately recovers the loosened silt to avoid secondary deposition. The entire dredging process is efficient and environmentally friendly, and greatly reduces manpower and time costs.

[0063] In the preferred scheme, the construction method also includes conducting a detailed geological survey of the construction area before the dredging operation to determine the specific parameters and plans of the dredging operation; the above settings can not only ensure the safety and efficiency of the dredging operation, but also effectively avoid unnecessary damage to the surrounding geological environment. At the same time, according to the survey results, resources can be reasonably allocated to reduce construction costs.

[0064] In the preferred solution, the construction method also includes real-time monitoring of the operating status and dredging effect of the dredging equipment during the dredging operation to ensure the quality and efficiency of the dredging operation; the above settings can promptly discover and solve problems in the dredging process. At the same time, through data analysis, the dredging strategy is optimized to reduce the impact on the environment and achieve the goal of efficient and environmentally friendly dredging operations.

[0065] In the preferred solution, the construction method also includes a quality inspection of the anti-sinking plate 5 and the surrounding seabed after the dredging operation is completed to ensure that the adsorption force has been effectively reduced and the requirements for the displacement of the guide frame 1 are met; the above settings can significantly improve the construction efficiency, ensure that the guide frame 1 can be smoothly and accurately shifted to the next construction position, and at the same time reduce potential risks during the construction process, laying a solid foundation for subsequent marine engineering construction.

[0066] In summary, this invention presents an innovative solution for offshore foundation construction, particularly in areas such as offshore wind farm construction and bridge construction, where bottom-supported guide frames are widely used. This effectively overcomes the technical challenge of excessive adsorption between the anti-sinking plate and the seabed mud, which hinders construction efficiency and safety. Compared to existing technologies, this invention significantly improves treatment effectiveness and operational efficiency through a series of innovative designs and technological breakthroughs, providing strong technical support for related projects.

[0067] In practice, this invention precisely measures the elevation between the top surface of the guide frame 1 platform and the seabed 2 to calculate the fixed length of the sling 3, achieving precise underwater positioning and efficient lifting of the dredging equipment 4. Furthermore, by pre-setting reference points on the sling 3 and precisely controlling the height of the dredging equipment 4 to different reference points, millimeter-level control of the dredging depth is achieved, ensuring the accuracy and thoroughness of the dredging operation.

[0068] Furthermore, the present invention innovatively proposes a comprehensive and efficient flushing process. This process not only thoroughly flushes the backfilled silt on the surface of the anti-sinking plate 5, but also penetrates deep into the edges and bottom of the plate. Utilizing a symmetrical flushing principle, this process effectively disrupts the silt's overall structure and significantly reduces its adsorption capacity. This invention demonstrates a high degree of flexibility and adaptability to complex and changing geological conditions. By increasing the length of the slings 3 and employing enhanced dredging techniques, the method ensures effective implementation in a variety of geological environments.

[0069] In summary, this invention, with its systematic construction methods, efficient adsorption force reduction technology, flexible construction method adjustment strategies, and rigorous quality inspection and acceptance procedures, provides a comprehensive and innovative solution to the underwater adsorption problem of bottom-mounted guide frame anti-sinking plates. Its significant technical advantages and practicality not only improve construction efficiency and reduce costs, but also significantly enhance the safety and reliability of the construction process, injecting new vitality into the development of water-based foundation construction.

Claims

1. A construction method for reducing the underwater adsorption force of a bottom-mounted guide frame anti-sinking plate, characterized in that: The following steps are involved: Step 1: Positioning of guide frame (1) and preparation of sling (3); Step 2: Desilting equipment (4) marking and benchmark setting; Step 3: Position the dredging equipment (4), determine the position of the anti-sinking plate (5), and lift the dredging equipment (4) to the designated position; Step 4: Unilateral dredging operation; Step 5: Repeat the dredging process, repeating Step 2 to Step 3 to complete the dredging of the remaining sides of the guide frame (1); Step 6: After silting, use a high-pressure water gun (8) to flush the silt on the top and bottom of the anti-sinking plate (5); Step 7: The guide frame (1) is lifted, and the crane (6) of the crane ship hooks the guide frame (1). If the guide frame (1) cannot be lifted, repeat Step 6 until the guide frame (1) is displaced.

2. The construction method for reducing the underwater adsorption force of the anti-sinking plate of the bottom-supported guide frame according to claim 1 is characterized by: The specific operation steps of Step 1 are: measuring the elevation of the top surface of the guide frame (1) platform and the elevation of the seabed surface (2), the height from the top surface of the guide frame (1) platform to the seabed surface (2), and selecting a fixed length sling (3) for hoisting the underwater dredging equipment (4).

3. The construction method for reducing the underwater adsorption force of the anti-sinking plate of the bottom-supported guide frame according to claim 2 is characterized by: The length of the fixed-length sling (3) is the height from the top surface of the guide frame (1) platform to the seabed surface (2) plus a set margin to ensure that the dredging equipment has sufficient operating space.

4. The construction method for reducing the underwater adsorption force of the anti-sinking plate of the bottom-supported guide frame according to claim 3 is characterized by: The specific operation steps of Step 2 for setting the marking and reference point of the dredging equipment (4) are to measure the height of the dredging equipment (4), set a mark on the sling (3), define the point where the height difference between the top surface of the guide frame (1) platform and the seabed surface (2) and the height of the dredging equipment (4) is defined as the first reference point (9), and the points above and below the height setting point are the second reference point (10) and the third reference point (11), respectively. The set height is the control reference of the dredging depth.

5. The construction method for reducing the underwater adsorption force of the anti-sinking plate of the bottom-supported guide frame according to claim 4 is characterized in that: The specific operation steps of Step 3 are as follows: the diver explores the position of the anti-sinking plate (5), and the crane (6) lifts the dredging equipment (4) to the designated position through the fixed-length sling (3).

6. The construction method for reducing the underwater adsorption force of the anti-sinking plate of the bottom-supported guide frame according to claim 5 is characterized by: The specific operation steps of Step 4 are as follows: the dredging equipment (4) is lowered to the seabed surface (2), the first reference point (9) is flush with the top surface of the guide frame (1) platform, dredging is started until the third reference point (11) is flush with the top surface of the guide frame (1) platform, the hook is raised to the second reference point (10) is flush with the top surface of the guide frame (1) platform, and the dredging equipment (4) is moved horizontally to complete unilateral dredging to form a ditch (7).

7. The construction method for reducing the underwater adsorption force of the anti-sinking plate of the bottom-supported guide frame according to claim 6 is characterized by: The specific operation steps of Step 6 are as follows: after the dredging is completed, the diver uses a high-pressure water gun (8) to flush the silt on the top and bottom of the anti-sinking plate (5) to destroy the integrity of the silt.

8. The construction method for reducing the underwater adsorption force of the anti-sinking plate of the bottom-supported guide frame according to claim 7 is characterized in that: The flushing sequence of the high-pressure water gun (8) is performed in a symmetrical order to prevent the anti-sinking plate (5) from deflecting due to uneven force.

9. The construction method for reducing the underwater adsorption force of the anti-sinking plate of a bottom-mounted guide frame according to claim 8 is characterized by: The flushing pressure and flow rate of the high-pressure water gun (8) are adjusted according to actual needs, and the bottom sludge is deeply flushed inward along the edge of the anti-sinking plate (5) to ensure that the integrity of the sludge is effectively destroyed and the adsorption force is further reduced.

10. The construction method for reducing the underwater adsorption force of the anti-sinking plate of the bottom-supported guide frame according to claim 9, characterized in that: The construction method also includes conducting a detailed geological survey of the construction area before the dredging operation to determine the specific parameters and plan of the dredging operation; the construction method also includes real-time monitoring of the operating status and dredging effect of the dredging equipment during the dredging operation to ensure the quality and efficiency of the dredging operation.

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