Construction method for overall dismantling of main body of offshore wind power wind measurement tower

Abstract

The present application belongs to the offshore wind power construction technical field, especially relates to a kind of offshore wind power wind measurement tower main body integrated dismantling construction method, comprising: obtaining the tower data of wind measurement tower, the length and bearing capacity of pull rope and binding height are calculated according to tower data;Pull rope one end is fixed on wind measurement tower, the other end is connected with winch of anchor boat and makes pull rope keep slack state;Auxiliary tool is installed on wind measurement tower leg, tool includes first U-shaped steel plate and second U-shaped steel plate, first U-shaped steel plate is fixed with short H-shaped steel, second U-shaped steel plate is fixed with H-shaped steel column, and both are fixed by connecting steel pin;Tower leg cutting line is set between two U-shaped steel plates on tower leg, cutting depth of tower direction side is eighty percent of tower leg width, and cutting depth of reverse direction side is one hundred percent;Pull out connecting steel pin, start anchor boat and winch to pull wind measurement tower and dump.The present application can realize wind measurement tower one-time integrated dismantling, speed up progress, save cost.

Description

Technical Field

[0001] This invention belongs to the field of offshore wind power construction technology, and in particular relates to a construction method for the integral dismantling of the main body of an offshore wind power meteorological tower. Background Technology

[0002] In the development and utilization of offshore wind resources, offshore wind measurement data mainly comes from observations at coastal meteorological stations, marine vessel meteorological observations, oil platform meteorological observations, satellite remote sensing observations, and offshore wind measurement tower observations. Among these, offshore wind measurement tower observations are one of the most direct and reliable technical means of capturing wind resources in the local sea area, and also an important data support for the site selection of offshore wind farms. Currently, most commonly used offshore wind measurement towers are fixed, self-supporting towers, which need to be dismantled after completing their initial wind measurement mission and having no further demand.

[0003] However, due to the complex and changeable weather at sea, the available working windows are limited, and the dismantling of offshore wind measurement towers involves far more unstable factors than onshore construction. Existing dismantling methods often rely on empirical methods and involve blind construction, lacking systematic stress calculations and construction process design, resulting in slow dismantling progress, high construction costs, and significant safety hazards. In particular, controlling the direction of tower collapse, preventing accidental collapse, and ensuring the safety of construction vessels and personnel during the tower's toppling process are urgent technical challenges that need to be addressed.

[0004] Therefore, there is an urgent need for a construction method that allows for the overall dismantling of the main body of offshore wind turbine wind measurement towers. Summary of the Invention

[0005] The purpose of this invention is to provide a construction method for the integral dismantling of the main body of an offshore wind turbine wind measurement tower, so as to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following solution: A construction method for the integral dismantling of the main body of an offshore wind turbine wind measurement tower includes: Obtain the tower body data of the wind measurement tower, including the tower weight, tower height, and foundation half-open area. The length and load-bearing capacity of the guy rope, as well as the binding height of the guy rope, are obtained based on the tower body data. One end of the pull rope is fixed at the corresponding position on the wind measurement tower according to the binding height, and the other end of the pull rope is connected to the winch of the anchor boat, and the pull rope is in a slack state. Auxiliary fixtures are installed on each leg of the meteorological tower. The auxiliary fixtures include a first U-shaped steel plate and a second U-shaped steel plate fixed to the leg of the meteorological tower. The first U-shaped steel plate and the second U-shaped steel plate are spaced apart. A short H-shaped steel is fixed to one end of the first U-shaped steel plate, and an H-shaped steel column is fixed to one end of the second U-shaped steel plate. The short H-shaped steel and the H-shaped steel column are coaxially arranged and fixed by connecting steel pins. The H-shaped steel column is fixed to the base of the meteorological tower. A leg cutting line is provided on the legs of the wind measuring tower. The leg cutting line is located between the first U-shaped steel plate and the second U-shaped steel plate. The cutting depth of the leg cutting line on the side of the wind measuring tower facing the inverted direction is 80% of the width of the wind measuring tower leg, and the cutting depth of the leg cutting line on the side of the wind measuring tower facing the opposite inverted direction is 100% of the width of the wind measuring tower leg. Pull out the connecting steel pin to separate the short H-beam and the H-beam column, and start the anchor boat and the winch to pull and tilt the wind measurement tower by the pull rope.

[0007] Optionally, the open ends of the first U-shaped steel plate and the second U-shaped steel plate are fitted onto the corresponding tower legs of the wind measurement tower, wherein the open end of the first U-shaped steel plate is closed by fixing a first elongated sealing steel plate, and the open end of the second U-shaped steel plate is closed by fixing a second elongated sealing steel plate.

[0008] Optionally, the short H-beam and the H-beam column are provided with pin holes for the same connecting steel pin to pass through, and the connecting steel pin passes through the pin holes to fix the short H-beam and the H-beam column.

[0009] Optionally, one end of an H-shaped steel diagonal brace is fixed to one side of the H-shaped steel column, the H-shaped steel diagonal brace is inclined, and the bottom end of the H-shaped steel diagonal brace is fixed to the base of the wind measurement tower.

[0010] Optionally, a pad is fixed to the bottom end of the H-beam diagonal brace and the bottom end of the H-beam column, and the pad is fixed to the base of the wind measurement tower.

[0011] Optionally, a first rectangular steel plate is fixed to the bottom end of the short H-beam, and a second rectangular steel plate is fixed to the top end of the H-beam column. The pin hole is formed on the first rectangular steel plate and the second rectangular steel plate.

[0012] Optionally, the wind speed during offshore operations should not exceed 8 m / s.

[0013] Optionally, the pull rope is a steel wire rope.

[0014] Optionally, the distance between the anchor boat and the wind measuring tower is not less than 1.2 times the height of the tower.

[0015] Optionally, the fixing point of the pull rope to the wind measuring tower is located above half the height of the wind measuring tower.

[0016] Compared with the prior art, the present invention has the following advantages and technical effects: This construction method employs a tower-tilting stress design, precisely calculating the load-bearing capacity of the guy ropes and the tension of the hull based on the tower weight, tower height, half-length foundation opening, guy rope binding height, and the distance between the tower and the ship. It scientifically selects guy rope specifications and construction parameters, avoiding purely empirical and blind construction. By setting up auxiliary fixing fixtures, the tower body is temporarily fixed before the tower legs are cut. After cutting, the connecting steel pins are pulled out, putting the tower body in a tiltable state, providing redundant safety measures to prevent sudden collapse during cutting and ensuring the safety of construction personnel. In the auxiliary fixtures, U-shaped steel plates are fixed to the tower legs with long strip-shaped sealing steel plates, short H-beams are coaxially fixed to H-beam columns with connecting steel pins, H-beam diagonal braces provide lateral support, and pads increase the stress-bearing area, resulting in a stable and reliable overall structure. By binding the guy ropes above half the height of the wind measurement tower, the torque principle is used to reduce the traction force. The anchor boat is positioned at a distance of at least 1.2 times the tower height for towing, ensuring the safety of the vessel. After the tower collapses, it lies horizontally on the water surface, making it easier for grab boats to salvage and recover it, effectively speeding up the dismantling process and saving construction costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the construction preparation before pulling the wind measurement tower according to the present invention; Figure 2 This is a schematic diagram of the operation of pulling the wind measurement tower according to the present invention; Figure 3 This is a schematic diagram of the stress analysis of the wind measurement tower of the present invention; Figure 4 This is a schematic diagram of the auxiliary tooling structure of the present invention; Figure 5 This is a top view schematic diagram of the auxiliary tooling structure of the present invention; Among them, 1. base plate; 2. H-beam diagonal brace; 3. short H-beam; 4. first rectangular steel plate; 5. second rectangular steel plate; 6. connecting steel pin; 7. H-beam column; 8. first long strip sealing steel plate; 9. first U-shaped steel plate; 10. second long strip sealing steel plate; 11. second U-shaped steel plate; 12. wind measurement tower leg; 13. tower leg cutting line; 14. wind measurement tower; 15. guy rope; 16. winch; 17. anchor boat. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Reference Figures 1 to 5 This invention discloses a construction method for the integral dismantling of the main body of an offshore wind turbine wind measurement tower, comprising: Obtain the tower body data of the wind measurement tower 14, including the tower weight, tower height, and foundation half-open area. The length and load-bearing capacity of the guy rope 15, as well as the binding height of the guy rope 15, are obtained based on the tower body data. One end of the pull rope 15 is fixed to the corresponding position of the wind measuring tower 14 according to the binding height, and the other end of the pull rope 15 is connected to the winch 16 of the anchor boat 17, and the pull rope 15 is in a slack state. Auxiliary fixtures are installed on each of the wind measurement tower legs 12 of the wind measurement tower 14. The auxiliary fixtures include a first U-shaped steel plate 9 and a second U-shaped steel plate 11 fixed to the wind measurement tower legs 12. The first U-shaped steel plate 9 and the second U-shaped steel plate 11 are spaced apart. A short H-shaped steel 3 is fixed to one end of the first U-shaped steel plate 9, and an H-shaped steel column 7 is fixed to one end of the second U-shaped steel plate 11. The short H-shaped steel 3 and the H-shaped steel column 7 are coaxially arranged and fixed by connecting steel pins 6. The H-shaped steel column 7 is fixed to the tower base of the wind measurement tower 14. A leg cutting line 13 is provided on the tower leg 12 of the wind measuring tower. The leg cutting line 13 is located between the first U-shaped steel plate 9 and the second U-shaped steel plate 11. The cutting depth of the leg cutting line 13 on the side of the wind measuring tower 12 in the inverted direction is 80% of the width of the wind measuring tower leg 12, and the cutting depth of the leg cutting line 13 on the side of the wind measuring tower 12 in the opposite direction of the inverted direction is 100% of the width of the wind measuring tower leg 12. Pull out the connecting steel pin 6 to separate the short H-beam 3 and the H-beam column 7, and start the anchor boat 17 and winch 16 to pull the wind measuring tower 14 down by pulling the rope 15.

[0021] First, obtain the tower weight, tower height, and foundation half-opening value of the wind measuring tower 14. Based on these tower data, calculate the length, load-bearing capacity, and binding height of the guy rope 15. Then, fix one end of the guy rope 15 to the wind measuring tower 14 at the calculated binding height, and connect the other end to the winch 16 of the anchor boat 17, keeping the guy rope 15 slack. Next, install auxiliary fixtures at each wind measuring tower leg 12. In these fixtures, the first U-shaped steel plate 9 and the second U-shaped steel plate 11 are spaced apart. One end of the first U-shaped steel plate 9 is fixed with a short H-shaped steel 3, and one end of the second U-shaped steel plate 11 is fixed with an H-shaped steel column 7. The short H-shaped steel 3 and the H-shaped steel column 7 are fixed by connecting steel pins 6, and the H-shaped steel column 7 is fixed to the tower base. Set a tower leg cutting line 13 on the wind measuring tower leg 12 between the first U-shaped steel plate 9 and the second U-shaped steel plate 11. The cutting depth on the side facing the inversion direction is 80% of the tower leg width, and the cutting depth on the side facing the opposite inversion direction is 100%. Finally, pull out the connecting steel pin 6 to separate the short H-beam 3 and the H-beam column 7, start the anchor boat 17 and winch 16 to pull the wind measuring tower 14 down through the pull rope 15, and achieve the overall dismantling.

[0022] As an optional implementation, the open ends of the first U-shaped steel plate 9 and the second U-shaped steel plate 11 are fitted onto the corresponding tower legs 12 of the wind measurement tower. The open end of the first U-shaped steel plate 9 is closed by fixing the first elongated sealing steel plate 8, and the open end of the second U-shaped steel plate 11 is closed by fixing the second elongated sealing steel plate 10.

[0023] The open ends of the first U-shaped steel plate 9 and the second U-shaped steel plate 11 are fitted onto the corresponding wind measurement tower legs 12. The open end of the first U-shaped steel plate 9 is closed by fixing the first long strip sealing steel plate 8, and the open end of the second U-shaped steel plate 11 is closed by fixing the second long strip sealing steel plate 10, thereby firmly fixing the U-shaped steel plate to the wind measurement tower legs 12 and preventing the tooling from loosening during cutting and traction.

[0024] As an optional implementation, the short H-beam 3 and the H-beam column 7 are provided with pin holes for the same connecting steel pin 6 to pass through, and the connecting steel pin 6 passes through the pin holes to fix the short H-beam 3 and the H-beam column 7.

[0025] Both the short H-beam 3 and the H-beam column 7 have pin holes through which the same connecting steel pin 6 passes, securing the short H-beam 3 and the H-beam column 7. This structure allows for a detachable connection between the two; when the column needs to be tilted after cutting, the fixing can be released simply by pulling out the connecting steel pin 6, making the operation quick and easy.

[0026] As an optional implementation, one end of an H-shaped steel diagonal brace 2 is fixed to one side of the H-shaped steel column 7. The H-shaped steel diagonal brace 2 is set at an angle, and the bottom end of the H-shaped steel diagonal brace 2 is fixed to the base of the wind measuring tower 14.

[0027] One end of an H-beam steel diagonal brace 2 is fixed to one side of the H-beam steel column 7. The H-beam steel diagonal brace 2 is set at an angle, and its bottom end is fixed to the base of the wind measurement tower 14. The H-beam steel diagonal brace 2 provides lateral support for the H-beam steel column 7, enhances the stability of the entire auxiliary tooling, and prevents the tooling from lateral deformation or instability during the tower leg cutting process.

[0028] As an optional implementation, a pad 1 is fixed to the bottom end of the H-beam diagonal brace 2 and the bottom end of the H-beam column 7, and the pad 1 is fixed to the base of the wind measuring tower 14.

[0029] Both the bottom end of the H-beam diagonal brace 2 and the bottom end of the H-beam column 7 are fixed with pads 1, which are then fixed to the base of the wind measurement tower 14. The pads 1 increase the contact area between the H-beam diagonal brace 2 and the H-beam column 7 and the tower base, allowing the force to be transmitted more evenly to the tower base, thus preventing excessive local stress that could damage the tower base or cause instability of the fixture.

[0030] As an optional implementation, a first rectangular steel plate 4 is fixed to the bottom end of the short H-beam 3, and a second rectangular steel plate 5 is fixed to the top end of the H-beam column 7. Pin holes are opened on the first rectangular steel plate 4 and the second rectangular steel plate 5.

[0031] The bottom end of the short H-beam 3 is fixed with a first rectangular steel plate 4, and the top end of the H-beam column 7 is fixed with a second rectangular steel plate 5. Pin holes are made on the first rectangular steel plate 4 and the second rectangular steel plate 5. By setting the first rectangular steel plate 4 and the second rectangular steel plate 5 as the connection interface, it is convenient to process the pin holes and ensure the alignment accuracy when the connecting steel pin 6 is inserted, while increasing the stress area at the connection.

[0032] As an optional implementation method, the wind speed during offshore operations should not exceed 8 m / s.

[0033] This wind speed condition ensures that cutting and traction operations can be carried out in sea states with low wind speeds, reducing the impact of wind loads on the wind measurement tower 14 and the guy rope 15, and ensuring construction safety and the accuracy of the tower collapse direction.

[0034] As an optional implementation, the pull rope 15 is a steel wire rope.

[0035] The wire rope has high tensile strength and wear resistance, and can withstand the large tensile force generated during the tower collapse process. At the same time, it has a certain degree of flexibility, which makes it easy to wind and release on winch 16.

[0036] As an optional implementation, the distance between the anchor boat 17 and the wind measuring tower 14 is not less than 1.2 times the tower height.

[0037] The distance between the anchor boat 17 and the wind measuring tower 14 is no less than 1.2 times the tower height. This distance parameter ensures that even if the wind measuring tower 14 collapses towards the anchor boat 17 during the towing and toppling process, the anchor boat 17 will remain outside the safe zone, preventing the vessel from being hit by the collapsing tower and ensuring the safety of the construction vessel and personnel.

[0038] As an alternative implementation, the fixing point of the rope 15 to the wind measuring tower 14 is located above half the height of the wind measuring tower 14.

[0039] The fixing point of the rope 15 to the wind measuring tower 14 is located above half the height of the wind measuring tower 14. This binding height parameter utilizes the lever principle to generate a larger overturning moment on the wind measuring tower 14 with the rope 15, making it easier to pull the tower down under the same traction force, thus reducing the requirements on the towing capacity of the anchor boat 17.

[0040] Please refer to the following steps for details: Step 1: Inverted tower design.

[0041] The process of the tower falling is that the wind measuring tower 14 uses the base of the two legs 12 on the side of the tower falling as fulcrums, and under the traction of the rope 15, the wind measuring tower 14 tilts from a vertical position until it falls onto the sea surface.

[0042] For ease of vessel operation, a single guy rope 15 is typically used. For the entire dismantled wind measuring tower 14, the guy rope 15 should be positioned to indicate the tilting direction of the wind measuring tower 14. One end of the guy rope 15 is tied to the tower body of the wind measuring tower 14. The tying height depends on the actual site conditions. The higher the rope, the farther the anchoring point of the vessel at the sea surface, resulting in a greater torque and making it easier to pull the wind measuring tower 14 down. However, actual site conditions are often constrained by factors such as nearby high-altitude operations, vessel performance, and the length of the guy rope 15, preventing arbitrary arrangements. Therefore, the arrangement must be tailored to local conditions and the specific site requirements.

[0043] The following section will use the force analysis diagram to select parameters based on force calculations.

[0044] According to the Pythagorean theorem and torque balance, assume the tension in rope 15 is T: Because of T B=G A, then T = (G) A) / B B=L sinα, α=ATAN(h / (L+AS)), where ATAN() is the arctangent formula.

[0045] In the above formulas: G is the tower weight in Newtons (N), A is the half-width of the foundation, B is the perpendicular distance from the base of the collapsed tower leg to the resultant line of the guy wires in meters (m), S is the perpendicular distance c between the binding position of guy rope 15 and the center line of the wind measuring tower 14 in meters (m), H is the height of the wind measuring tower 14 in meters (m), and h is the height of the binding position of guy rope 15 in meters (m).

[0046] Parameter selection: Obtain tower body data through design documents, determine the distance between the ship and tower, binding height and length of guy rope 15, calculate the load-bearing capacity of guy rope 15 and the tension of the ship hull, and select the specification of guy rope 15.

[0047] Wind measurement tower 14G: Query according to design documents.

[0048] The height of the wind measurement tower is 14 meters (H): as determined by the design documents.

[0049] Basic half-root opening A: Query according to the design documents.

[0050] Distance L from the ship tower: When the anchor boat 17 is in the state of being pulled by the traction rope 15, the distance between it and the collapse support point of the wind measuring tower 14 is at least greater than 1.2 times the height H of the wind measuring tower 14, to ensure the safety of the anchor boat 17 during the collapse process, that is, the tower collapse calculation is based on L≥1.2H.

[0051] The height h of the binding position of the rope 15: the higher the binding point, the smaller the pulling force that causes the wind measuring tower 14 to collapse. It is advisable to bind it above half the height of the wind measuring tower 14.

[0052] The distance S between the binding point of the rope 15 and the center line of the wind measuring tower 14 is obtained by querying or calculating after determining h.

[0053] Hull tension T: Calculated according to the formula.

[0054] Bearing capacity of rope 15: After calculating the actual force T, considering an imbalance factor of 1.3 and a safety factor of 3.0, the minimum breaking strength P of the selected rope 15 is ≥ 1.3. 3.0 T.

[0055] Step 2: Construction preparation. Based on the tower collapse design, select anchor boat 17 (as a traction vessel), grab boat (for salvage), transport barge and other ship and machinery equipment.

[0056] Other equipment: safety belts, nylon ropes, pull ropes 15, hand chain hoists, pulleys, oxygen cutting equipment, electric welding machines, welding rods, steel pins, steel plates, and H-beams.

[0057] Step 3: Rope 15 setup. After the anchor boat 17 enters the site and moors to the wind measurement tower 14, the rope 15 is wound around the drum of the winch 16 at the stern. A nylon rope is tied to one end of the rope 15. Then, the construction personnel carry tools and the nylon rope to climb the tower. After reaching the designated height, the rope 15 is lifted from the boat using a hand-operated hoist, pulley, and other tools, and finally tied to the main structure of the wind measurement tower 14.

[0058] For the arrangement of the toppling guy rope 15 of the wind measuring tower 14, a single guy rope 15 is generally used for ease of vessel operation. For self-supporting wind measuring towers 14 that are being dismantled entirely, the guy rope 15 should be positioned on the centerline of the toppling direction and tied to the main structure of the wind measuring tower 14. The tying height depends on the actual site conditions; the higher the tying, the farther the vessel's anchoring point at the sea surface, resulting in a greater torque and making it easier to pull the wind measuring tower 14 down. However, actual site conditions are often constrained by factors such as nearby high-altitude operations, vessel performance, and the length and weight of the guy rope 15, preventing arbitrary arrangements. Therefore, the arrangement must be tailored to local conditions and specific site requirements. Recommended arrangement... Figure 2 , Figure 3 Choose a suitable height and rope 15 specification, and the rope 15 should be tied above half the height of the wind measurement tower 14.

[0059] After the construction workers have secured the helium rope 15, the winch 16 at the stern of the anchor boat 17 needs to be loosened, allowing the helium rope 15 to hang naturally under gravity. Figure 2 As shown, the anchor boat 17 is waiting under the wind measurement tower 14 and is located downstream of the wind measurement tower 14.

[0060] Step 4: Install auxiliary fixing fixtures. Since the weather conditions at sea are different from those on land, before cutting the wind measurement tower 14, select a time period with a wind speed of no more than 8 m / s according to the weather conditions, and adopt redundant safety measures. Use auxiliary fixtures to temporarily fix the cutting leg parts to prevent the tower from suddenly collapsing during cutting.

[0061] The auxiliary fixture consists of H-beams and steel plates. Commonly available types of H-beams and steel plates can be used, and the required dimensions are determined based on the actual site conditions. Specifically, it includes H-beam diagonal braces 2 and H-beam columns 7. A base plate 1 is provided at the bottom of the H-beam diagonal braces 2 and H-beam columns 7. The base plate 1 is securely welded to the contact points of the H-beam diagonal braces 2 and H-beam columns 7. The bottom of the base plate 1 is also fixed to the platform of the wind measurement tower 14 by welding. It also includes short H-beams 3, a first rectangular steel plate 4, and a second rectangular steel plate 5. The first rectangular steel plate 4 and the second rectangular steel plate 5 have pin holes and are welded to the short H-beams 3 and H-beam columns 7 respectively. Connecting steel pins 6 are inserted into the pre-drilled pin holes on the first rectangular steel plate 4 and the second rectangular steel plate 5 to connect the short H-beams 3 and H-beam columns 7.

[0062] It also includes a first elongated sealing steel plate 8, a second elongated sealing steel plate 10, a first U-shaped steel plate 9, and a second U-shaped steel plate 11. The ends of the first U-shaped steel plate 9 and the second U-shaped steel plate 11 are respectively welded to the flange plates of the short H-beam 3 and the H-beam column 7. The contact surfaces of the first elongated sealing steel plate 8, the first U-shaped steel plate 9, the second elongated sealing steel plate 10, and the second U-shaped steel plate 11 are firmly welded, and all welds between the components of this tooling structure are fully welded.

[0063] After the auxiliary tooling is set up, the tower leg cutting line 13 is set on the tower leg 12 of the wind measurement tower.

[0064] After the installation of the guy rope 15 is completed, the tooling is welded first. Each wind measurement tower leg 12 is welded with an auxiliary tooling. The tooling size is designed according to the actual situation. The steel plates and H-beams are taken down and cut on land, and transported to the construction site for direct welding and assembly, which can save time.

[0065] Step 5: Tower leg cutting. Following the standard procedure for overall tower collapse, the tower legs on the opposite side of the collapse are completely cut off using gas welding. About 80% of the main material of the two tower legs on the collapse side is cut off. Before cutting, the auxiliary tooling must be welded in place and the steel pins must be checked to ensure that all of them are inserted. After the tower legs are cut, the construction personnel pull out the steel pins of the auxiliary tooling. After the pins are removed, all personnel must immediately evacuate the wind measurement tower platform 14.

[0066] Step Six: Clear the site. After the main legs of the wind measurement tower 14 are cut, remove all the pins of the auxiliary fixing fixtures and all construction personnel on the wind measurement tower 14 platform should leave.

[0067] Step 7: After the ship starts and personnel evacuate, the anchor boat 17 is ready to move towards the direction of the tower collapse. The stern winch 16 should be in a relaxed state. The drum of the winch 16 releases the pull rope 15 as the anchor boat 17 moves forward. When the anchor boat 17 is at least 1.2 times the height of the wind measuring tower 14, the stern winch 16 is braked and locked. Personnel are away from the cable rebound area of ​​the stern winch 16. The anchor boat 17 increases its power and continues to move towards the direction of the tower collapse, pulling the wind measuring tower 14 down in the set direction so that the tower body lies horizontally on the water surface.

[0068] Step 8: Material recovery. After the tower body lies horizontally on the water, the grab boat begins the salvage operation, lifting the tower structure and placing it on the transport barge.

[0069] Precautions for demolition projects: 1. When the pull rope 15 begins to tighten, the distance from the center of the wind measuring tower 14 should be no less than 1.2 times the total height of the tower; the stern winch 16 can only tighten after the length of the pull rope 15 is set.

[0070] 2. Warning signs should be set up or warning boats should be stationed within the safety area around the project to prevent personnel and ships from accidentally entering the collapsed tower area.

[0071] 3. For the tower legs on the opposite side of the inverted tower, ensure that they are completely cut off. The cut should not be too large, generally 10-15mm is appropriate, and the cutting line should be slightly higher than the cutting height of the inverted tower support point.

[0072] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0073] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A construction method for the integral dismantling of the main body of an offshore wind turbine wind measurement tower, characterized in that, include: Obtain the tower body data of the wind measuring tower (14), the tower body data including tower weight value, tower height value, and foundation half-open value; The length and bearing capacity of the pull rope (15), as well as the binding height of the pull rope (15), are obtained based on the tower body data. One end of the pull rope (15) is fixed at the corresponding position of the wind measuring tower (14) according to the binding height, and the other end of the pull rope (15) is connected to the winch (16) of the anchor boat (17), and the pull rope (15) is in a slack state. Auxiliary fixtures are installed on each of the wind measurement tower legs (12) of the wind measurement tower (14). The auxiliary fixtures include a first U-shaped steel plate (9) and a second U-shaped steel plate (11) fixed on the wind measurement tower legs (12). The first U-shaped steel plate (9) and the second U-shaped steel plate (11) are spaced apart. A short H-shaped steel (3) is fixed to one end of the first U-shaped steel plate (9), and an H-shaped steel column (7) is fixed to one end of the second U-shaped steel plate (11). The short H-shaped steel (3) and the H-shaped steel column (7) are coaxially arranged and fixed by connecting steel pins (6). The H-shaped steel column (7) is fixed to the tower base of the wind measurement tower (14). A tower leg cutting line (13) is provided on the tower leg (12) of the wind measuring tower. The tower leg cutting line (13) is located between the first U-shaped steel plate (9) and the second U-shaped steel plate (11). The cutting depth of the tower leg cutting line (13) on the tower leg (12) on the side of the inverted tower direction is 80% of the width of the tower leg (12). The cutting depth of the tower leg cutting line (13) on the tower leg (12) on the side of the inverted tower direction is 100% of the width of the tower leg (12). Pull out the connecting steel pin (6) to make the short H-beam (3) and the H-beam column (7) separable, and start the anchor boat (17) and the winch (16) to pull the wind measuring tower (14) down by the pull rope (15).

2. The construction method for the integral dismantling of the main body of an offshore wind turbine wind measurement tower according to claim 1, characterized in that, The open ends of the first U-shaped steel plate (9) and the second U-shaped steel plate (11) are fitted onto the corresponding tower legs (12) of the wind measuring tower. The open end of the first U-shaped steel plate (9) is closed by fixing the first long strip sealing steel plate (8), and the open end of the second U-shaped steel plate (11) is closed by fixing the second long strip sealing steel plate (10).

3. The construction method for the integral dismantling of the main body of an offshore wind turbine wind measurement tower according to claim 1, characterized in that, The short H-beam (3) and the H-beam column (7) are provided with pin holes for the same connecting steel pin (6) to pass through, and the connecting steel pin (6) passes through the pin holes to fix the short H-beam (3) and the H-beam column (7).

4. The construction method for the integral dismantling of the main body of an offshore wind turbine wind measurement tower according to claim 1, characterized in that, One end of an H-shaped steel diagonal brace (2) is fixed to one side of the H-shaped steel column (7). The H-shaped steel diagonal brace (2) is inclined and the bottom end of the H-shaped steel diagonal brace (2) is fixed to the base of the wind measuring tower (14).

5. The construction method for the integral dismantling of the main body of an offshore wind turbine wind measurement tower according to claim 4, characterized in that, The bottom end of the H-beam diagonal brace (2) and the bottom end of the H-beam column (7) are both fixed with pads (1), and the pads (1) are fixed to the base of the wind measuring tower (14).

6. The construction method for the integral dismantling of the main body of an offshore wind turbine wind measurement tower according to claim 3, characterized in that, The bottom end of the short H-beam (3) is fixed with a first rectangular steel plate (4), and the top end of the H-beam column (7) is fixed with a second rectangular steel plate (5). The pin hole is opened on the first rectangular steel plate (4) and the second rectangular steel plate (5).

7. The construction method for the integral dismantling of the main body of an offshore wind turbine wind measurement tower according to claim 1, characterized in that, The wind speed during offshore operations should not exceed 8 m / s.

8. A construction method for the integral dismantling of the main body of an offshore wind turbine wind measurement tower according to claim 1, characterized in that, The pull rope (15) is a steel wire rope.

9. A construction method for the integral dismantling of the main body of an offshore wind turbine wind measurement tower according to claim 1, characterized in that, The distance between the anchor boat (17) and the wind measuring tower (14) is not less than 1.2 times the height of the tower.

10. A construction method for the integral dismantling of the main body of an offshore wind turbine wind measurement tower according to claim 1, characterized in that, The fixing point of the pull rope (15) and the wind measuring tower (14) is located above half the height of the wind measuring tower (14).

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