A method for processing tower tube anchor bolt misalignment

Abstract

The application discloses a tower tube anchor bolt dislocation processing method, comprising the following steps: step 1, hole expansion is performed on the flange of the tower tube; step 2, the upper anchor plate and the original grouting layer of the tower base are removed; step 3, leveling supports are arranged between the anchor bolts; step 4, the tower tube is hoisted on the tower base, so that the anchor bolts pass through the flange and are fixed, and the flange falls on the leveling supports; step 5, grouting templates are installed on the inner and outer sides of the anchor bolts to perform grouting construction; the grouting layer covers the leveling supports and the top surface is higher than the lower surface of the flange; and step 6, anchor bolt tensioning is performed. When the anchor bolts are inclined, the free length is increased, the total stress of the anchor bolts can be controlled below the original design stress level, and the stress safety of the anchor bolts can be ensured; after the processing, the limit strength and the fatigue strength of the anchor bolt connection meet the requirements of relevant specifications.

Description

Technical Field

[0001] This invention relates to the field of wind turbine generator technology, and in particular to a method for handling misaligned tower anchor bolts. Background Technology

[0002] The base tower of a wind turbine is generally an anchor-bolted structure, meaning that the flanges at the bottom of the tower are connected to the concrete foundation using prestressed anchor bolts. However, for segmented towers, the following problems may exist: 1. The dimensions of the base flanges of the bottom section may be too large or too small compared to the design drawings; the dimensions of the anchor plates of the foundation anchor bolts may be too small or too large compared to the design drawings. During tower manufacturing, deviations may occur in the ellipticity and hole spacing of the assembled base flanges, or the longitudinal flange spacing may be larger than required by the drawings during welding. These potential deviations may result in no gap between the flanges after the riveting is tightened on-site, leading to a smaller-than-expected tower size. 2. Uneven gaps at the anchor plate joints may prevent the flange process connection plates from fitting properly, and the anchor bolts may not be perpendicular, with deviations in spacing.

[0003] The aforementioned issues can cause a misalignment between the center circles of the anchor bolt assembly mounting holes and the flange mounting holes, or the anchor bolts may be tilted, preventing the flange from being fitted with the anchor bolts. If the misalignment is minor, the position of the anchor bolts can be slightly adjusted mechanically to align them with the center circles of the flange mounting holes; alternatively, the flange can be adjusted to accommodate the position of the anchor bolts.

[0004] However, when the anchor bolt position deviation is large, not only will lateral displacement occur, but also a certain degree of bending will form. If the anchor bolt is forced into place, additional stress will be generated. If no measures are taken to force it into place, and the top of the anchor bolt is tightened with a common nut and washer, the top of the anchor bolt is constrained by the nut, and the bottom is constrained by the concrete. In this case, the stress on the anchor bolt attachments is very high, and there is a risk of breakage. To reduce the stress on the anchor bolt attachments, the angle between the anchor bolt top tightening nut and the flange face is adjusted, and a spherical washer is added below the nut. At this time, the stress on the anchor bolt attachments is reduced to some extent, but it is still very high, and there is a risk of breakage. Therefore, when the deviation is large and it is not possible to remake the anchor bolt or flange, a method for treating tower anchor bolt misalignment is needed to reconnect the tower and the anchor bolt. Summary of the Invention

[0005] The purpose of this invention is to provide a method for handling tower anchor bolt misalignment, which addresses the aforementioned problems by resolving issues such as deviations between the center circles of the anchor bolt assembly mounting holes and the flange mounting holes, or anchor bolt tilting, which prevents the flange from being fitted with the anchor bolt.

[0006] The technical solution adopted in this invention is as follows:

[0007] A method for correcting misalignment of tower anchor bolts includes the following steps:

[0008] Step 1: Enlarge the flange of the tower;

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

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

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

[0012] Step 5: Install grouting templates on both the inside and outside of the anchor bolts and carry out grouting construction; the grouting layer should overflow the leveling support and the top surface should be higher than the lower surface of the flange;

[0013] Step 6: Tension the anchor bolts.

[0014] Alternatively, step 2.5, anchor bolt casing drilling, can be included between step 2 and step 3.

[0015] Alternatively, step 1 may include the following steps:

[0016] Step 1.1: Preparation

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

[0018] b. Inspect the magnetic base and ensure it is undamaged;

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

[0020] Step 1.2: Fix the magnetic base

[0021] a. Make contact between the magnetic base of the magnetic drill and the outer surface of the flange to ensure that the working area is clean and dust-free;

[0022] b. Press the switch on the magnetic base to allow it to adhere to the surface;

[0023] Step 1.3: Adjust the magnetic base

[0024] a. The strength of the magnetic attraction can be adjusted using the handle or knob on the magnetic base;

[0025] b. Adjust the angle and position of the magnetic base according to actual needs so that the drill bit is centered in the hole after installation;

[0026] Step 1.4, Install accessories

[0027] a. Ensure a secure and reliable connection between the magnetic drill and its attachments;

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

[0029] Step 1.5, Start 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 operation, maintain even pressure and a stable grip;

[0033] d. Water is used to cool the drill bit during operation;

[0034] Step 1.6, End Operation

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

[0036] b. After the drill bit has completely stopped rotating, remove the magnetic drill.

[0037] Alternatively, step 2 may include the following steps:

[0038] Step 2.1: Remove the upper anchor plate connector;

[0039] Step 2.2: Remove the upper anchor plate in sections;

[0040] Step 2.3: Use a pneumatic pick to chisel away the grout layer.

[0041] Alternatively, step 2.5 may include the following steps:

[0042] Step 2.5.1: Use a water drill bit to drill a hole concentrically with the anchor bolt, so that the anchor bolt has a greater free length;

[0043] Step 2.5.2: Use sling-ring anchor bolts and measure whether the center circle of the top mounting hole of the anchor bolt meets the installation requirements;

[0044] Step 2.5.3: Seal the annular gap drilled by the sleeve drill with flexible waterproof adhesive.

[0045] Alternatively, step 3 may include the following steps:

[0046] Step 3.1: Use rebar anchoring to evenly distribute leveling studs between the two rings of anchor bolts;

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

[0048] Step 3.3: Add local anchor plates at the tower joints. The local anchor plates are positioned and leveled using nylon nuts.

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

[0050] Alternatively, step 4 may include the following steps:

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

[0052] Step 4.2: Then use flexible waterproof adhesive to seal the annular gap drilled by the sleeve drill.

[0053] Alternatively, in step 5, the grouting material has a strength of not less than 120 MPa and contains crack-resistant fibers.

[0054] Alternatively, step 6 may include the following steps:

[0055] Step 6.1: Prepare adjusting washers of different specifications;

[0056] Step 6.2: Confirm the perpendicularity of the exposed end of the anchor bolt to the flange face, 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 and 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 tower anchor bolt misalignment treatment method provided by the present invention can control the total stress of the anchor bolt below the original design stress level when the anchor bolt is deviated by increasing the free length, thus ensuring the safety of the anchor bolt under stress. After treatment, the ultimate strength and fatigue strength of the anchor bolt connection meet the relevant specifications.

[0060] 2. The tower anchor bolt misalignment treatment method provided by the present invention can precisely adjust the position of the anchor bolt by moving it, so that the center circle of the anchor bolt assembly mounting hole is aligned with the center circle of the flange mounting hole, thereby ensuring that the flange can be smoothly fitted into the anchor bolt. Timely adjustment of the anchor bolt position can avoid rework caused by misalignment, saving time and labor costs. The anchor bolt misalignment problem improves the installation quality of the tower and foundation connection and ensures the overall stability of the structure. Attached Figure Description

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

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

[0063] Figure 2 This is a schematic diagram of the partial anchor plate arrangement.

[0064] Figure 3 This is a schematic diagram of the tensioner arrangement.

[0065] The markings in the diagram are: 1-Tower base, 2-Grouting layer, 3-Leveling stud, 4-Leveling nut, 5-Partial anchor plate, 6-Nylon nut, 7-Spherical washer, 8-Tensioner, 9-Adjusting washer, 10-Anchor bolt, 11-Flange. Detailed Implementation

[0066] The present invention will now be described in detail with reference to the accompanying drawings.

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

[0068] Any feature disclosed in this specification, unless otherwise stated, may be replaced by other equivalent or similar features. That is, unless otherwise stated, each feature is merely one example of a series of equivalent or similar features.

[0069] A certain wind power project has a segmented tower, which is 135m high and divided into 3 sections at the bottom. The anchor bolt diameter is 39mm and the total design stress is 584.0MPa.

[0070] During hoisting, it was discovered that there was a deviation between the center circles of the mounting holes of anchor bolt 10 and flange 11, causing anchor bolt 10 to be tilted and preventing flange 11 from being fitted into anchor bolt 10. If no measures are taken to force it into place, the top of anchor bolt 10 will be secured with ordinary nuts and washers, with the top of anchor bolt 10 constrained by the nuts and the bottom by concrete.

[0071] If the flange mounting hole diameter is enlarged to 46mm, the maximum forced displacement of anchor bolt 10 with a center circle difference of 20mm is 20 / 2 - (46 - 36.3) / 2 = 5.15mm. At this point, the total stress of anchor bolt 10 is 3894.0MPa, posing a risk of breakage. To reduce the stress on anchor bolt 10, the angle between the top fastening nut and the flange face is adjusted, and a spherical washer 7 is added below the nut. While this reduces the stress on anchor bolt 10, it still reaches 2570.0MPa, posing a risk of breakage.

[0072] Therefore, given that the above methods all carry the risk of fracture, this solution adopts a new method for handling tower anchor bolt misalignment, including the following steps:

[0073] Step 1: Enlarge the flange 11 of the tower;

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

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

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

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

[0078] Step 6, as follows Figure 3 As shown, 10 anchor bolts are tensioned.

[0079] Step 1 addresses the discrepancy between the center circles of the anchor bolt 10 assembly mounting holes and the flange 11 mounting holes, ensuring that the flange 11 can be fitted into the anchor bolt 10 even with slight positional deviations. Step 2 provides sufficient space to adjust the position of the anchor bolt 10, facilitating subsequent leveling support arrangement and grouting. Step 3 ensures that the flange 11 of the tower rests smoothly on the support during anchor bolt 10 adjustment, providing a uniform support surface for subsequent grouting. Step 4, by hoisting the tower and passing the anchor bolt 10 through the enlarged flange 11, allows for precise adjustment of the anchor bolt 10's position and ensures good contact between the flange 11 and the leveling support. Step 5, the installation of the grouting template controls the grouting range and shape, ensuring that the grout layer 2 evenly fills the gap between the anchor bolt 10 and the flange 11, and overflows the leveling support and the lower surface of the flange 11, providing stable fixation for the anchor bolt 10. Step 6, tensioning the anchor bolt 10, is to ensure sufficient prestress between the anchor bolt 10 and the grouting layer 2, thereby enhancing the load-bearing capacity of the anchor bolt 10 and the overall stability of the structure. This solution solves the misalignment problem of the anchor bolt 10, ensuring a firm connection between the tower and the tower base 1; by enlarging the hole and leveling the support, the flexibility and adaptability of the installation are improved; the grouting layer 2 ensures the fixation of the anchor bolt 10 and the safety of the structure; and tensioning the anchor bolt 10 further enhances the stability and load-bearing capacity of the structure.

[0080] In another specific implementation, step 2.5, drilling the casing of the anchor bolt 10, is included between steps 2 and 3. For anchor bolts 10 with significant inclination, a casing is drilled to increase the range of motion. The casing helps guide the drill bit, prevents it from shifting during drilling, and protects 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 surface;

[0084] b. Inspect the magnetic base and ensure it is undamaged;

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

[0086] Step 1.2: Fix the magnetic base

[0087] a. Make contact between the magnetic base of the magnetic drill and 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 allow it to adhere to the surface;

[0089] Step 1.3: Adjust the magnetic base

[0090] a. The strength of the magnetic attraction can be adjusted using the handle or knob on the magnetic base;

[0091] b. Adjust the angle and position of the magnetic base according to actual needs so that the drill bit is centered in the hole after installation;

[0092] Step 1.4, Install accessories

[0093] a. Ensure a secure and reliable connection between the magnetic drill and its attachments;

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

[0095] Step 1.5, Start 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 operation, maintain even pressure and a stable grip;

[0099] d. Water is used to cool the drill bit during operation;

[0100] Step 1.6, End Operation

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

[0102] b. After the drill bit has completely stopped rotating, remove the magnetic drill.

[0103] Magnetic drills possess strong magnetic force, allowing them to firmly adhere to metal surfaces and operate stably even on vertical or inverted surfaces without the need for additional fixing devices. They also feature precise depth control and positioning functions, ensuring accurate drilling depth and location.

[0104] The requirements for hole enlargement are as follows:

[0105] 1) Depth control: The depth of the enlarged 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 enlarging the hole, ensure that the center is in the original position. After the hole enlargement 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) Recording requirements: During the reaming process, the location, depth, inner diameter and other information of the reamed hole should be recorded in detail for subsequent inspection and acceptance.

[0108] 4) Other requirements: After enlarging the hole, check that the hole size is correct, use a grinding wheel to grind the hole opening to remove burrs, and perform cold spray zinc anti-corrosion treatment on the impact area on the flange 11 end face and inside 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 and needs to be removed before the upper anchor plate can be removed.

[0111] Step 2.2: Remove the upper anchor plate in sections; removing it in sections can reduce potential damage to the anchor bolt 10 and facilitate control of the removal process.

[0112] Step 2.3: Use a pneumatic pick to remove the grout layer 2. Using a pneumatic pick can quickly and effectively remove the grout layer 2, providing sufficient space for the adjustment of the anchor bolt 10.

[0113] During dismantling, care should be taken to avoid damaging the threads of anchor bolt 10 and the sleeve of anchor bolt 10.

[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 71mm and an inner diameter of 63mm to drill a hole concentrically with the anchor bolt 10, so that the anchor bolt 10 has a larger free length; calculate the required free length and drilling depth of different anchor bolts according to different offsets.

[0116] The center circle of the installation hole for the inner and outer anchor bolts is 5780mm, and the diameter of the tie bar (No. 14 steel bar) is 14mm. Therefore, the theoretical net distance between the tie bars is 3.14*5780 / 96-14=175mm, which is much larger than the outer diameter of the drill bit of 71mm. Therefore, drilling will not break the tie bar.

[0117] However, two of the circumferential reinforcement bars on both sides of anchor bolt 10 are quite close to anchor bolt 10 and may be broken. However, since both the tower and flange 11 are circumferential, the radial tie bars mainly bear the local load on the foundation, and the circumferential reinforcement bars on both sides of anchor bolt 10 are basically ineffective. Therefore, breaking the circumferential reinforcement bars on both sides will not affect the overall bearing capacity of the foundation.

[0118] The equipment uses professional servo drilling equipment. The requirements for the equipment are that the verticality angle is within 0.05 minutes, the vertical movement straightness is within 0.02 mm, the equipment height is 2800 mm, and it is equipped with monitoring functions (temperature and torque monitoring). It is necessary to add internal high-pressure water outlet (with a certain amount of detergent or other lubricant added to clean water) to ensure smooth cooling of the drill bit and smooth removal of dust.

[0119] To prevent excessive torque from causing internal deformation of the drill bit, the torque is calculated based on the selected material and dimensions, and the torque status is monitored in real time using a torque power meter to prevent overload.

[0120] By using the existing 8 anchor bolts of the fan to lock the workbench plate, and adding 2 auxiliary supports to the foundation surface, the stability of the workbench plate can be guaranteed.

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

[0122] When drilling, cleaning, and inspection are carried out, if it is found that the distance between the hole wall and the anchor bolt 10 is too short and further drilling may damage the anchor bolt 10, the angle can be finely adjusted. The upper limit of the angle is 5° to ensure that the anchor bolt 10 is not damaged during drilling.

[0123] When designing the equipment base, a long slot is reserved to allow for fine-tuning of the equipment on the base plate, with an adjustment range of ±5mm. Utilizing the principle of a half-bolt, a 70mm diameter, 100mm long iron rod is machined into a 57mm diameter round nut and screwed onto anchor bolt 10. One nut is placed on the top and one on the bottom of anchor bolt 10. The positioning and guiding drilling machine also serves to protect anchor bolt 10. The nut is removed after drilling is complete.

[0124] Step 2.5.2: Use a sling to clamp the anchor bolt 10 and measure whether the center circle of the top mounting hole of the anchor bolt 10 meets the installation requirements;

[0125] Step 2.5.3: Seal the annular gap drilled by the sleeve drill with flexible waterproof adhesive to prevent impurities and subsequent grouting material from entering the gap.

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

[0127] Step 3.1: Leveling studs 3 are evenly distributed between the two rings of anchor bolts 10 using a rebar anchoring method. After drilling the anchor bolt 10 casing, 24 leveling studs 3 are evenly distributed between the two rings of anchor bolts 10. The leveling studs 3 are M30-6.8 grade, 315mm long, and fully threaded. They are fixed between the two rings of anchor bolts 10 using a rebar anchoring method, with an insertion depth of 200mm and 115mm exposed. The thickness of the leveling nut 4 is not less than twice the thickness of the standard nut. Impact drilling is used for rebar anchoring to avoid damaging the rebar.

[0128] Step 3.2 After the rebar installation is completed and cured for 3 days, level the top of the leveling stud 3 and the leveling nut 4 so that the surface height of the top surface of the leveling nut 4 is the same as the surface of the original design upper anchor plate, with a horizontality error of 1mm.

[0129] Step 3.3: Add a local anchor plate 5 at the tower joint. The anchor plate is made of Q355 steel, 60mm thick, with a drilled hole diameter of 50mm, and four chamfered edges on the lower surface of 10×10mm. The local anchor plate 5 is 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 2-3mm 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, the gap should be filled with 0.1, 0.2, or 0.5mm thin steel plates, and epoxy steel 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 cylinder. After the tower cylinder is in place, install all the spherical washers 7 and nuts. Tighten the nuts to a torque of 100 Nm.

[0133] Step 4.2: Then use flexible waterproof adhesive to seal the annular gap drilled by the sleeve drill to prevent grout from entering the annular gap between the anchor bolt 10 and the concrete.

[0134] In another specific implementation, in step 5, the grout strength should be no less than 120 MPa, anti-crack fibers should be added, and the top surface of the grout layer 2 should be 10 mm higher than the lower surface of the flange 11. The inner and outer molds should be made as inclined as possible to reduce the possibility of grout edge breakage.

[0135] The tower must not be detached during grouting.

[0136] The tower can be detached 24 hours after the grout has cured.

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

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

[0139] Step 6.2: Confirm the perpendicularity of the exposed end of anchor bolt 10 to the flange 11 face, and adjust the adjusting washer 9 so that the exposed end of anchor bolt 10 is perpendicular to the top surface of adjusting washer 9. The exposed end of anchor bolt 10 may be tilted at different angles or in different directions to the flange 11 face (horizontal alignment), therefore, the tensioner 8 and the exposed end of anchor bolt 10 may have misalignment, which will affect the connection and tightening of tensioner 8 and anchor bolt 10. Adjusting washer 9 can solve this problem.

[0140] Step 6.3: Install tensioner 8. After the grout has cured to the design strength, anchor bolt 10 can be tensioned with a design preload of 450kN and an over-tensioning coefficient of 1.15.

[0141] After installation, tap the top of anchor bolt 10 with a small hammer to check for any abnormalities. Check once a month. If no abnormalities are found after one year, maintain the fan according to the host manufacturer's technical documents.

[0142] Security verification:

[0143] For a bolt with a diameter of 36.3 mm, calculations show that with a free length L of 250 mm, the total anchor stress is 584.0 MPa; with a forced displacement of 5.15 mm, the total anchor stress is 2432.5 MPa. After this solution adds a spherical washer, reduces the anchor preload, and increases the free length of the anchor (L = 1000 mm), the total anchor stress is 576.6 MPa. It can be seen that the anchor stress after this treatment is slightly lower than the original design. Therefore, this solution can control the total anchor stress below the original design stress level, ensuring the anchor's safety under load.

[0144] This invention is not limited to the specific embodiments described above. The invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A method for correcting misalignment of tower anchor bolts, characterized in that: Includes the following steps: Step 1: Enlarge the flange of the tower; Step 2: Remove the upper anchor plate and the original grouting layer of the tower base; Step 2.5, Anchor Bolt Sleeve Drilling: Step 2.5.1: Use a water drill bit to drill a hole concentrically with the anchor bolt, so that the anchor bolt has a greater free length; Step 2.5.3: Seal the annular gap drilled by the sleeve drill with flexible waterproof adhesive; Step 3: Install leveling supports between the anchor bolts: Step 3.1: Use rebar anchoring to evenly distribute leveling studs between the two rings of anchor bolts; Step 3.3: Add local anchor plates at the tower joints. The local anchor plates are positioned and leveled using nylon nuts. Step 4: Hoist the tower onto the tower base so that the anchor bolts pass through the flange and are fixed, and the flange rests on the leveling support; Step 5: Install grouting templates on both the inside and outside of the anchor bolts and carry out grouting construction; the grouting layer should overflow the leveling support and the top surface should be higher than the lower surface of the flange; Step 6: Tension the anchor bolts.

2. The method for correcting misalignment of tower anchor bolts as described in claim 1, characterized in that: Step 2.5 also includes Step 2.5.2: Use a sling-type anchor bolt and measure whether the center circle of the mounting hole at the top of the anchor bolt meets the installation requirements.

3. The method for correcting misalignment of tower anchor bolts as described in claim 1, characterized in that: Step 1 includes the following steps: Step 1.1: Preparation a. Place the magnetic drill on a flat and stable surface; b. Inspect the magnetic base and ensure it is undamaged; c. Prepare suitable drill bits and threaded connectors; Step 1.2: Fix the magnetic base a. Make contact between the magnetic base of the magnetic drill and the outer surface of the flange to ensure that the working area is clean and dust-free; b. Press the switch on the magnetic base to allow it to adhere to the surface; Step 1.3: Adjust the magnetic base a. The strength of the magnetic attraction can be adjusted using the handle or knob on the magnetic base; b. Adjust the angle and position of the magnetic base according to actual needs so that the drill bit is centered in the hole after installation; Step 1.4, Install accessories a. Ensure a secure and reliable connection between the magnetic drill and its attachments; b. Install the thread drill bit onto the magnetic drill; Step 1.5, Start Operation a. Turn on the power switch of the magnetic drill; b. Press the start button to make the drill bit rotate; c. During operation, maintain even pressure and a stable grip; d. Water is used to cool the drill bit during operation; Step 1.6, End Operation a. After use, turn off the power switch first; b. After the drill bit has completely stopped rotating, remove the magnetic drill.

4. The method for correcting misalignment of tower anchor bolts as described in 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 in sections; Step 2.3: Use a pneumatic pick to chisel away the grout layer.

5. The method for correcting misalignment of tower anchor bolts as described in claim 1, characterized in that: Step 3 also includes step 3.2, leveling the top of the leveling stud and the leveling nut so that the surface height of the top surface of the leveling nut is the same as the surface of the original design on the upper anchor plate.

6. The method for correcting misalignment of tower anchor bolts as described in claim 5, 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.

7. The method for correcting misalignment of tower anchor bolts as described in claim 1, characterized in that: Step 4 includes the following steps: Step 4.1: Slowly insert the tower cylinder. After the tower cylinder is in place, install all the fasteners and tighten the nuts. Step 4.2: Then use flexible waterproof adhesive to seal the annular gap drilled by the sleeve drill.

8. The method for correcting misalignment of tower anchor bolts as described in claim 7, characterized in that: In step 5, the grouting material has a strength of not less than 120 MPa and contains crack-resistant fibers.

9. The method for correcting misalignment of tower anchor bolts as described in 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 perpendicularity of the exposed end of the anchor bolt to the flange face, 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 and tension the anchor bolts.

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