Tower drum anchor bolt dislocation processing method

Abstract

The invention discloses a tower drum anchor bolt dislocation processing method. The method comprises the following steps that 1, a flange of a tower drum is subjected to broaching; 2, an upper anchor plate and an original grouting layer of the tower footing are dismantled; 3, leveling supports are arranged between the anchor bolts; 4, the tower drum is hung on the tower footing, the anchor bolts penetrate through the flanges and are fixed, and the flanges fall on the leveling supports; 5, grouting formworks are installed on the inner side and the outer side of the anchor bolt for grouting construction; the grouting layer overflows the leveling support and the top surface is higher than the lower surface of the flange; and 6, anchor bolt tensioning is conducted. When the anchor bolt deflects, the free length is increased, so that the total stress of the anchor bolt can be controlled below the original design stress level, and the stress safety of the anchor bolt can be ensured; after processing, the checking calculation of the connection ultimate strength and fatigue strength of the anchor bolt meets the requirements of related specifications.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine generator sets, in particular to a method for processing the misalignment of tower anchor bolts. Background Art

[0002] The bottom tower of a wind turbine is generally an anchor-bolt structure, that is, the flange at the bottom of the wind turbine tower is connected to the concrete foundation through prestressed anchor bolts. For segmented towers, the following problems may exist: 1. The size of the flange at the base of the bottom tower is larger or smaller than the requirements of the design drawings, and the size of the foundation anchor bolt anchor plate is smaller or larger than the requirements of the design drawings; during the production and manufacturing process of the tower, there are deviations in the ovality and hole spacing of the tower base flange after assembly, or when the longitudinal flange is welded, the longitudinal flange spacing is larger than the requirements of the drawings. The above possible deviations result in no gap between the flanges after the rivets are tightened on site, resulting in a smaller cylinder size. 2. The gaps at the anchor plate joints are uneven, the flange process connection plate cannot be inserted, the anchor bolts are not vertical, and there are deviations in the spacing.

[0003] Based on the above problems, there will be a deviation between the center circle of the anchor assembly mounting hole and the center circle of the flange mounting hole, or the anchor will be tilted, causing the flange to be unable to fit into the anchor. If the deviation is not large, the position of the anchor can be slightly adjusted by mechanical methods to align it with the center circle of the flange mounting hole; or the flange can be trimmed to adapt to the position of the anchor.

[0004] However, when the position deviation of the anchor bolt is large, it will not only cause lateral displacement, but also form a certain degree of bending. If the anchor bolt is forced into place, additional stress will be generated. If no measures are taken to force it into place, the top of the anchor bolt is fastened with ordinary nuts and washers. At this time, the top of the anchor bolt is constrained by the nut and the bottom is constrained by concrete. The stress of the anchor bolt accessories is very large and there is a risk of breakage. In order to reduce the stress of the anchor bolt accessories, the angle between the nut and the flange surface at the top of the anchor bolt is reduced, and a spherical washer is added under the nut. At this time, the stress of the anchor bolt accessories is reduced, but it is still very large and there is a risk of breakage. Therefore, when the deviation is large and the anchor bolt or flange cannot be remade, a tower anchor misalignment treatment method is needed to deal with it so that the tower and the anchor bolt can be reconnected. Summary of the invention

[0005] The object of the present invention is to provide a tower anchor misalignment processing method for the above-mentioned problems, which can solve the problem that there is a deviation between the center circle of the anchor assembly mounting hole and the center circle of the flange mounting hole, or the anchor is tilted, resulting in the flange being unable to be inserted into the anchor.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A tower anchor bolt misalignment treatment method comprises the following steps:

[0008] Step 1, expanding the flange of the tower;

[0009] Step 2: Remove the upper anchor plate and original grouting layer of the tower base;

[0010] Step 3: Arrange leveling supports between anchor bolts;

[0011] Step 4: Hang the tower on the tower base so that the anchor bolts pass through the flange and are fixed, and the flange falls on the leveling support;

[0012] Step 5: Install grouting templates inside and outside the anchor bolts for grouting construction; the grouting layer overflows the leveling support and the top surface is higher than the lower surface of the flange;

[0013] Step 6: tension the anchor bolts.

[0014] Optionally, step 2.5, anchor casing drilling, is further included between step 2 and step 3.

[0015] Optionally, step 1 includes the following steps:

[0016] Step 1.1: Preparation

[0017] a. Place the magnetic drill on a flat and stable table;

[0018] b. Check the magnetic base and make sure it is not damaged;

[0019] c. Prepare suitable drill bits, threaded joints and other accessories;

[0020] Step 1.2: Fix the magnetic base

[0021] a. Place the magnetic base of the magnetic drill in contact with the outer surface of the flange to ensure that the working area is smooth and dust-free;

[0022] b. Press the switch on the magnetic base to attach to the surface;

[0023] Step 1.3: Adjust the magnetic base

[0024] a. The size of the adsorption force can be adjusted by the handle or knob on the magnetic base;

[0025] b. According to actual needs, adjust the angle and position of the magnetic base so that the drill bit is located in the center of the hole after installation;

[0026] Step 1.4: Install accessories

[0027] a. Ensure that the connection between the magnetic drill and accessories is firm and reliable;

[0028] b. Install the threaded drill bit onto the magnetic drill;

[0029] Step 1.5: Start the operation

[0030] a. Turn on the power switch of the magnetic drill;

[0031] b. Press the start button to make the drill bit rotate;

[0032] c. During the operation, maintain even pressure and a steady grip;

[0033] d. Use water to cool the drill bit during operation;

[0034] Step 1.6: End the operation

[0035] a. After use, turn off the power switch first;

[0036] b. Wait for the drill bit to stop rotating completely and then remove the magnetic drill.

[0037] Optionally, step 2 includes the following steps:

[0038] Step 2.1, remove the upper anchor plate connector;

[0039] Step 2.2, remove the upper anchor plate piece by piece;

[0040] Step 2.3: Use a pneumatic pick to chisel out the grouting layer.

[0041] Optionally, step 2.5 includes the following steps:

[0042] Step 2.5.1, use a water drill bit to cover the anchor bolt and drill a hole concentric with the anchor bolt, so that the anchor bolt has a larger free length;

[0043] Step 2.5.2: Use a sling hoop anchor bolt and measure the center circle of the mounting hole at the top of the anchor bolt to see if it meets the installation requirements;

[0044] Step 2.5.3: Use flexible waterproof glue to seal the annular gap drilled by the casing.

[0045] Optionally, step 3 includes the following steps:

[0046] Step 3.1, use the planting method to evenly arrange the leveling studs between the two circles of anchor bolts;

[0047] Step 3.2: Level the leveling nut on the top of the leveling stud so that the top surface of the leveling nut is the same as the upper surface of the original designed upper anchor plate;

[0048] Step 3.3: Add local anchor plates at the joints of the tower and use nylon nuts to position and level the local anchor plates.

[0049] Alternatively, before the tower is in place, the top surface of the local anchor plate is 2-3mm lower than the leveling stud. After the tower is in place, the local anchor plate is tightened against the tower flange by adjusting the nylon nut.

[0050] Optionally, step 4 includes the following steps:

[0051] Step 4.1: Slowly insert the tower. After the tower is in place, install all fasteners and tighten the nuts.

[0052] Step 4.2: Use flexible waterproof glue to seal the annular gap drilled by the casing.

[0053] Optionally, in step 5, the strength of the grouting material is not less than 120 MPa, and anti-cracking fibers are added.

[0054] Optionally, step 6 includes the following steps:

[0055] Step 6.1, prepare adjusting washers of different specifications;

[0056] Step 6.2: Confirm the verticality between the exposed end of the anchor bolt and the flange surface, and adjust the adjusting washer so that the exposed end of the anchor bolt is perpendicular to the top surface of the adjusting washer;

[0057] Step 6.3: Install the tensioner to tension the anchor bolts.

[0058] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0059] 1. The present invention provides a tower anchor bolt misalignment treatment method. When the anchor bolt is deflected, the free length is increased to control the total stress of the anchor bolt below the original design stress level, thereby ensuring the safety of the anchor bolt stress. After the treatment, the ultimate strength and fatigue strength of the anchor bolt connection meet the requirements of relevant specifications.

[0060] 2. The present invention provides a method for processing tower anchor misalignment. By moving the anchor, its position can be accurately adjusted so that the center circle of the anchor assembly mounting hole is aligned with the center circle of the flange mounting hole, thereby ensuring that the flange can be smoothly inserted into the anchor; timely adjustment of the anchor position can avoid rework due to misalignment, save time and labor costs, and solve the problem of anchor misalignment, thereby improving the installation quality of the connection between the tower and the foundation and ensuring the overall stability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0062] Figure 1 It is a schematic diagram of the leveling support arrangement.

[0063] Figure 2 It is a schematic diagram of local anchor plate layout.

[0064] Figure 3 This is a schematic diagram of the stretcher layout.

[0065] Markings in the figure: 1-tower base, 2-grouting layer, 3-leveling stud, 4-leveling nut, 5-local anchor plate, 6-nylon nut, 7-spherical washer, 8-tensioner, 9-adjusting washer, 10-anchor bolt, 11-flange. DETAILED DESCRIPTION

[0066] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0067] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0068] Any feature disclosed in this specification, unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0069] A certain wind power project has a segmented tower. The tower is 135m high and the bottom three sections are divided into three pieces. The anchor bolt diameter is 39mm and the total design stress is 584.0MPa.

[0070] During the hoisting, it was found that there was a deviation between the center circle of the mounting hole of the anchor bolt 10 assembly and the center circle of the mounting hole of the flange 11, and the anchor bolt 10 was tilted, causing the flange 11 to be unable to fit into the anchor bolt 10. If no measures are taken to force it into place, the top of the anchor bolt 10 is fastened with ordinary nuts and washers, and the top of the anchor bolt 10 is constrained by the nut and the bottom is constrained by the concrete.

[0071] If the hole is enlarged, the flange mounting hole diameter is 46mm after enlargement, and the anchor 10 with a center circle difference of 20mm corresponding to the mounting hole has a maximum forced displacement of 20 / 2-(46-36.3) / 2=5.15mm. At this time, the total stress of the anchor 10 accessories is 3894.0MPa, which has a risk of fracture. In order to reduce the stress of the anchor 10 accessories, the angle between the top fastening nut of the anchor 10 and the flange surface is increased, and a spherical washer 7 is added under the nut. At this time, the stress of the anchor 10 accessories is reduced, but it is still 2570.0MPa, which has a risk of fracture.

[0072] Therefore, based on the fact that the above methods all have the risk of fracture, this solution adopts a new tower anchor dislocation treatment method, including the following steps:

[0073] Step 1, expanding the flange 11 of the tower;

[0074] Step 2: removing the upper anchor plate and the original grouting layer of the tower base 1;

[0075] Step 3: Arrange leveling supports between the anchor bolts 10;

[0076] Step 4: Figure 1 , 2 As shown, the tower is suspended on the tower foundation 1, so that the anchor bolt 10 passes through the flange 11 and is fixed, and the flange 11 falls on the leveling support;

[0077] Step 5: Install grouting templates inside and outside the anchor bolt 10 to perform grouting construction; the grouting layer 2 overflows the leveling support and the top surface is higher than the lower surface of the flange 11;

[0078] Step 6: Figure 3 As shown, the anchor bolt 10 is tensioned.

[0079] Among them, step 1 can solve the deviation problem between the center circle of the mounting hole of the anchor bolt 10 assembly and the center circle of the mounting hole of the flange 11, so that even if the position of the anchor bolt 10 is slightly deviated, the flange 11 can be adaptively inserted into the anchor bolt 10. Step 2 can provide sufficient space to adjust the position of the anchor bolt 10, and facilitate the subsequent leveling support arrangement and grouting construction. Step 3 ensures that the flange 11 of the tower can fall smoothly on the support during the adjustment of the anchor bolt 10, providing a uniform support surface for subsequent grouting. Step 4 By hoisting the tower and passing the anchor bolt 10 through the expanded flange 11, the position of the anchor bolt 10 can be accurately adjusted, and the flange 11 can be ensured to be in good contact with the leveling support. Step 5 The installation of the grouting template is to control the scope and shape of the grouting, ensure that the grouting layer 2 can evenly fill the gap between the anchor bolt 10 and the flange 11, and overflow the leveling support and the lower surface of the flange 11, providing a stable fixing effect for the anchor bolt 10. Step 6: The purpose of tensioning the anchor bolt 10 is to ensure that there is sufficient prestress between the anchor bolt 10 and the grouting layer 2, and to enhance the bearing capacity of the anchor bolt 10 and the overall stability of the structure. This solution solves the problem of misalignment of the anchor bolt 10, and ensures a firm connection between the tower tube and the tower base 1; by expanding the hole and leveling the support, the flexibility and adaptability of the installation are improved; the setting of the grouting layer 2 ensures the fixation of the anchor bolt 10 and the safety of the structure; the tensioning of the anchor bolt 10 further enhances the stability and bearing capacity of the structure.

[0080] As another specific implementation, step 2.5, casing drilling of the anchor bolt 10 is further included between step 2 and step 3. For anchor bolts 10 with a larger inclination, casing drilling is performed to increase the movable space. The casing can help guide the drill bit, prevent the drill bit from deviating during the drilling process, and protect the anchor bolt 10 from damage.

[0081] As another specific implementation, step 1 includes the following steps:

[0082] Step 1.1: Preparation

[0083] a. Place the magnetic drill on a flat and stable table;

[0084] b. Check the magnetic base and make sure it is not damaged;

[0085] c. Prepare suitable drill bits, threaded joints and other accessories;

[0086] Step 1.2: Fix the magnetic base

[0087] a. Place the magnetic base of the magnetic drill in contact with the outer surface of flange 11 to ensure that the working area is clean and dust-free;

[0088] b. Press the switch on the magnetic base to attach to the surface;

[0089] Step 1.3: Adjust the magnetic base

[0090] a. The size of the adsorption force can be adjusted by the handle or knob on the magnetic base;

[0091] b. According to actual needs, adjust the angle and position of the magnetic base so that the drill bit is located in the center of the hole after installation;

[0092] Step 1.4: Install accessories

[0093] a. Ensure that the connection between the magnetic drill and accessories is firm and reliable;

[0094] b. Install the Φ46 thread drill bit onto the magnetic drill;

[0095] Step 1.5: Start the operation

[0096] a. Turn on the power switch of the magnetic drill;

[0097] b. Press the start button to make the drill bit rotate;

[0098] c. During the operation, maintain even pressure and a steady grip;

[0099] d. Use water to cool the drill bit during operation;

[0100] Step 1.6: End the operation

[0101] a. After use, turn off the power switch first;

[0102] b. Wait for the drill bit to stop rotating completely and then remove the magnetic drill.

[0103] The magnetic drill has a strong magnetic force that can be firmly adsorbed on the metal surface, and can work stably even on vertical or inverted surfaces without the need for additional fixtures. And it is equipped with precise depth control and positioning functions to ensure the depth and position of the drilling are accurate.

[0104] Among them, the hole expansion requirements are as follows:

[0105] 1) Depth control: The depth of the expanded hole should penetrate the entire flange 11 of the tower base 1, and the hole should have a smooth transition without sharp corners or steps.

[0106] 2) Position control: After hole expansion, ensure that the center of the circle is in the original position. After hole expansion is completed, ensure that the diameter of the center circle of the mounting hole remains unchanged, and the distance between the center circles of the inner and outer mounting holes remains unchanged.

[0107] 3) Record requirements: During the hole expansion process, the location, depth, inner diameter and other information of the hole expansion should be recorded in detail for subsequent inspection and acceptance.

[0108] 4) Other requirements: After expanding the hole, check that the hole size is correct, use a grinding wheel to grind the hole mouth to remove burrs, and perform cold zinc spraying for anti-corrosion treatment on the bumps on the end face of flange 11 and the inside of the hole.

[0109] As another specific implementation, step 2 includes the following steps:

[0110] Step 2.1, remove the upper anchor plate connector; the upper anchor plate connector fixes the position of the upper anchor plate, which needs to be removed before further removing the upper anchor plate.

[0111] Step 2.2, dismantle the upper anchor plate piece by piece; dismantling by piece can reduce potential damage to the anchor bolt 10 and facilitate control of the dismantling process.

[0112] Step 2.3: Use a pneumatic pick to chisel the grouting layer 2. The pneumatic pick can be used to quickly and effectively remove the grouting layer 2, providing enough space for adjusting the anchor bolt 10.

[0113] Among them, care should be taken to avoid damaging the thread and casing of the anchor bolt 10 during removal.

[0114] As another specific implementation, step 2.5 includes the following steps:

[0115] Step 2.5.1, use a water drill bit with an outer diameter of 71 mm and an inner diameter of 63 mm, put it on the anchor bolt 10 and drill a hole concentric with the anchor bolt 10, so that the anchor bolt 10 has a larger free length; according to different offsets, calculate the required free length and drilling depth of different anchor bolts;

[0116] Among them, the center circle of the installation holes of the inner and outer anchor bolts 10 is 5780mm, and the diameter of the tie bar (No. 14 steel bar) is 14mm. Therefore, the theoretical clear distance of the tie bar is 3.14*5780 / 96-14=175mm, which is much larger than the outer diameter of the drill bit 71mm, so drilling will not break the tie bar.

[0117] However, the local annular reinforcement on both sides of the anchor bolt 10 has two bars that are close to the anchor bolt 10 and may be broken. However, the tower and flange 11 are both annular, so the radial tie steel bars mainly bear the local effect on the foundation, and the local annular reinforcement on both sides of the anchor bolt 10 basically has no effect, so breaking the annular reinforcement on both sides has no effect on the overall bearing capacity of the foundation.

[0118] Professional servo drilling equipment is used. The requirements for equipment production are that the vertical angle is within 0.05 minutes, the vertical movement straightness is within 0.02mm, the equipment height is 2800mm, and it has monitoring functions (temperature, torque monitoring). It is necessary to increase internal high-pressure water outlet (add a certain amount of lubricant such as detergent to the clean water) to ensure the internal cooling of the drill bit and smooth dust discharge.

[0119] In order to prevent the internal deformation of the drill bit caused by excessive torque, the torque is calculated according to the selected material and size, and the torque power meter is used to monitor the torque status in real time to prevent overload.

[0120] The existing 8 anchor bolts 10 of the fan are used to lock the workbench, and 2 auxiliary supports are added to the foundation surface to ensure the stability of the workbench.

[0121] Place an optical proximity meter in each cross direction of the rack to measure and adjust the verticality of the rack.

[0122] When drilling, cleaning and inspecting, if it is found that the hole wall is closer to the anchor bolt 10 at a certain point and further drilling may damage the anchor bolt 10, the angle can be fine-tuned with an upper limit of 5° to ensure that the anchor bolt 10 is not damaged during drilling.

[0123] When designing the base of the equipment, a long hole is reserved to meet the needs of fine-tuning the equipment on the bottom plate in the later stage, with an adjustment range of ±5mm. Using the principle of the Haff bolt, a 70mm diameter and 100mm long iron rod is processed into a 57mm diameter round nut and screwed on the anchor bolt 10, one above and one below the anchor bolt 10, and the positioning guide drill is used to protect the anchor bolt 10. After the drilling is completed, the nut is removed.

[0124] Step 2.5.2, use a sling hoop anchor bolt 10, and measure the center circle of the top mounting hole of the anchor bolt 10 to see if it meets the installation requirements;

[0125] Step 2.5.3: Use flexible waterproof glue to seal the annular gap formed by the casing drill to prevent impurities and subsequent grouting materials from entering the gap.

[0126] As another specific implementation, step 3 includes the following steps:

[0127] Step 3.1, use the planting method to fix the leveling studs 3 evenly between the two circles of anchor bolts 10: After the anchor bolt 10 casing is drilled, 24 leveling studs 3 are evenly arranged between the two circles of anchor bolts 10. The leveling studs 3 are M30-6.8 grade, 315mm long, and fully threaded. Use the planting method to fix between the two circles of anchor bolts 10, with an implantation depth of 200mm and an exposed 115mm. The thickness of the leveling nut 4 is not less than 2 times the thickness of the standard nut. The planting method uses impact drilling without damaging the steel bars.

[0128] Step 3.2: After the reinforcement is planted and cured for 3 days, level the top of the leveling stud 3 and the leveling nut 4 so that the top surface of the leveling nut 4 is the same as the upper surface of the original designed anchor plate, with a horizontal error of 1mm;

[0129] Step 3.3: Add local anchor plates 5 at the joints of the tower. The anchor plates are made of Q355, 60 mm thick, with a drilling hole diameter of 50 mm and four chamfers of 10×10 mm on the lower surface. The local anchor plates 5 are positioned and leveled using nylon nuts 6.

[0130] As another specific implementation method, before the tower is in place, the top surface of the local anchor plate 5 is 2-3 mm lower than the leveling stud 3. After the tower is in place, the local anchor plate 5 is tightened against the tower flange 11 by adjusting the nylon nut 6. If there is a gap between the local anchor plate 5 and the tower flange 11, 0.1, 0.2, or 0.5 mm thin steel plates should be used to fill the gap, and epoxy adhesive should be evenly applied to the upper and lower surfaces of the steel plates.

[0131] As another specific implementation, step 4 includes the following steps:

[0132] Step 4.1, slowly insert the tower, after the tower is in place, install all the spherical washers 7 and nuts, and the tightening torque of the nuts is 100Nm;

[0133] Step 4.2: Use flexible waterproof glue to seal the annular gap formed by the casing drill to prevent the grouting material from entering the annular gap between the anchor bolt 10 and the concrete.

[0134] As another specific implementation, in step 5, the strength of the grouting material is not less than 120 MPa, anti-cracking fibers are added, and the top surface of the grouting layer 2 should be 10 mm higher than the lower surface of the flange 11. The inner and outer molds are made as inclined as possible to reduce the possibility of edge collapse of the grouting material.

[0135] During the grouting construction, the tower must not be unhooked.

[0136] After the grouting material has been cured for 24 hours, the tower can be unhooked.

[0137] As another specific implementation, step 6 includes the following steps:

[0138] Step 6.1, make thin adjustment washers 9 in advance. The inner diameter of the adjustment washers 9 is 76mm, the outer diameter is 85mm, and the thicknesses are 0.1, 0.2, 0.5, 1.0, 2.0, and 5.0mm. There are no less than 5 pieces of each thickness, and tools are prepared for on-site cutting;

[0139] Step 6.2, confirm the verticality between the exposed end of the anchor bolt 10 and the flange 11, and adjust the adjusting washer 9 so that the exposed end of the anchor bolt 10 is perpendicular to the top surface of the adjusting washer 9; the exposed end of the anchor bolt 10 and the flange 11 surface (horizontality) may be inclined at different angles and directions, so the tensioner 8 and the exposed end of the anchor bolt 10 may be out of alignment, which will affect the docking and tightening of the tensioner 8 and the anchor bolt 10. The above problem can be solved by adjusting the washer 9.

[0140] Step 6.3, install the tensioner 8. After the grouting material reaches the design strength, the anchor bolt 10 can be tensioned, with a design pre-tension of 450kN and an over-tension coefficient of 1.15.

[0141] After the installation is completed, use a small hammer to knock on the top of the anchor bolt 10 to check if there is any abnormality. Check once a month. If there is no abnormality after one year, maintain the fan according to the technical documents of the host manufacturer.

[0142] Security Verification:

[0143] For bolts with a diameter of 36.3 mm, it is calculated that when the free length L is 250 mm, the total stress of the anchor bolt is 584.0 MPa; when the forced displacement is 5.15 mm, the total stress of the anchor bolt is 2432.5 MPa; after this solution adds a spherical washer, reduces the anchor bolt preload, and increases the free length of the anchor bolt, the free length L is 1000 mm and the total stress of the anchor bolt is 576.6 MPa. It can be seen that the anchor bolt stress after treatment is slightly lower than the original design. Therefore, this solution can control the total stress of the anchor bolt below the original design stress level to ensure the safety of the anchor bolt.

[0144] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A tower anchor bolt misalignment treatment method, characterized in that: The following steps are involved: Step 1, expanding the flange of the tower; Step 2: Remove the upper anchor plate and original grouting layer of the tower base; Step 3: Arrange leveling supports between anchor bolts; Step 4: Hang the tower on the tower base so that the anchor bolts pass through the flange and are fixed, and the flange falls on the leveling support; Step 5: Install grouting templates inside and outside the anchor bolts for grouting construction; the grouting layer overflows the leveling support and the top surface is higher than the lower surface of the flange; Step 6: tension the anchor bolts.

2. The tower anchor bolt misalignment treatment method according to claim 1, characterized in that: The step 2.5 of anchor bolt casing drilling is also included between step 2 and step 3.

3. The tower anchor bolt misalignment treatment method according to claim 2, characterized in that: Step 2.5 includes the following steps: Step 2.5.1, use a water drill bit to cover the anchor bolt and drill a hole concentric with the anchor bolt, so that the anchor bolt has a larger free length; Step 2.5.2: Use a sling hoop anchor bolt and measure the center circle of the mounting hole at the top of the anchor bolt to see if it meets the installation requirements; Step 2.5.3: Use flexible waterproof glue to seal the annular gap drilled by the casing.

4. The tower anchor bolt misalignment treatment method according to claim 1, characterized in that: In step 1, the following steps are included: Step 1.1: Preparation a. Place the magnetic drill on a flat and stable table; b. Check the magnetic base and make sure it is not damaged; c. Prepare suitable drill bits, threaded joints and other accessories; Step 1.2: Fix the magnetic base a. Place the magnetic base of the magnetic drill in contact with the outer surface of the flange to ensure that the working area is smooth and dust-free; b. Press the switch on the magnetic base to attach to the surface; Step 1.3: Adjust the magnetic base a. The size of the adsorption force can be adjusted by the handle or knob on the magnetic base; b. According to actual needs, adjust the angle and position of the magnetic base so that the drill bit is located in the center of the hole after installation; Step 1.4: Install accessories a. Ensure that the connection between the magnetic drill and accessories is firm and reliable; b. Install the threaded drill bit onto the magnetic drill; Step 1.5: Start the operation a. Turn on the power switch of the magnetic drill; b. Press the start button to make the drill bit rotate; c. During the operation, maintain even pressure and a steady grip; d. Use water to cool the drill bit during operation; Step 1.6: End the operation a. After use, turn off the power switch first; b. Wait for the drill bit to stop rotating completely and then remove the magnetic drill.

5. The tower anchor bolt misalignment treatment method according to claim 1, characterized in that: Step 2 includes the following steps: Step 2.1, remove the upper anchor plate connector; Step 2.2, remove the upper anchor plate piece by piece; Step 2.3: Use a pneumatic pick to chisel out the grouting layer.

6. The tower anchor bolt misalignment treatment method according to claim 1, characterized in that: Step 3 includes the following steps: Step 3.1, use the planting method to evenly arrange the leveling studs between the two circles of anchor bolts; Step 3.2: Level the leveling nut on the top of the leveling stud so that the top surface of the leveling nut is the same as the upper surface of the original designed upper anchor plate; Step 3.3: Add local anchor plates at the joints of the tower and use nylon nuts to position and level the local anchor plates.

7. The tower anchor bolt misalignment treatment method according to claim 6, characterized in that: Before the tower is in place, the top surface of the local anchor plate is lower than the leveling stud. After the tower is in place, the local anchor plate is tightened against the tower flange by adjusting the nylon nut.

8. The tower anchor bolt misalignment treatment method according to claim 1, characterized in that: Step 4 includes the following steps: Step 4.1: Slowly insert the tower. After the tower is in place, install all fasteners and tighten the nuts. Step 4.2: Use flexible waterproof glue to seal the annular gap drilled by the casing.

9. The tower anchor bolt misalignment treatment method according to claim 8, characterized in that: In step 5, the strength of the grouting material is not less than 120 MPa, and anti-cracking fibers are added.

10. The tower anchor bolt misalignment treatment method according to claim 1, characterized in that: Step 6 includes the following steps: Step 6.1, prepare adjusting washers of different specifications; Step 6.2: Confirm the verticality between the exposed end of the anchor bolt and the flange surface, and adjust the adjusting washer so that the exposed end of the anchor bolt is perpendicular to the top surface of the adjusting washer; Step 6.3: Install the tensioner to tension the anchor bolts.

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