A method for assembling and constructing spiral anchor groups

Abstract

The present invention proposes a method for assembling a spiral anchor group, comprising the following steps: measuring the foundation root opening, foundation lateral root opening, and diagonal spacing between four spiral anchor groups, and then measuring the root opening, lateral root opening, and diagonal spacing between four spiral anchor rods in a single spiral anchor group to determine the position of the base plate; fixing a line sweeper in the middle of the tower, sweeping out a bright line of the same height at one time, and drawing the bright line on the spiral anchor rod as the elevation line; then moving the line sweeper to the outside of the tower, repeatedly sweeping out a bright line that is consistent with the elevation line height and marking it, so that the elevation line on each spiral anchor rod is circumferentially closed; cutting off the upper end of the spiral anchor rod along the closed elevation line; and installing the base plate and tower foot connector according to the determined base plate position. The construction method of the present invention prevents the situation where the base plate steel plate cannot cover the spiral anchor rod due to large errors in the construction of the spiral anchor rod; and at the same time ensures that the four tower legs are at the same horizontal elevation.

Description

Technical Field

[0001] The invention relates to the technical field of spiral anchors, in particular to an assembly construction method for a spiral anchor group. Background Art

[0002] After the spiral anchor group is screwed into the corresponding position according to the design drawings, the actual position will have errors due to construction. If the base plate is also installed according to the design position, it is easy for the base plate to not cover the spiral anchor rod, thereby affecting the supporting force of the spiral anchor group. In order to facilitate the connection with the screw-in device, the upper end of the spiral anchor rod is usually provided with a connection hole. The connection hole is easy to affect the strength of the spiral anchor rod. After the spiral anchor rod is screwed into the ground, it is easy to cause the top height of the spiral anchor rod to be inconsistent due to reasons such as the geological environment or the screw-in depth, thereby affecting the height of the tower foot. How to ensure the consistency of the top height of each spiral anchor group is also a problem that needs to be solved. Summary of the Invention

[0003] The present invention provides a method for assembling and constructing a spiral anchor group, which prevents the situation in which the spiral anchor rods cannot be covered by the base steel plate due to large construction errors of the spiral anchor rods; and at the same time ensures that the four tower legs are at the same horizontal elevation.

[0004] The technical solution of the present invention is achieved as follows: a method for assembling and constructing a spiral anchor group, comprising the following steps:

[0005] (1) Four spiral anchor groups are buried at the set positions. Each spiral anchor group includes four spiral anchor rods. The foundation root opening, foundation lateral root opening and diagonal spacing between the four spiral anchor groups are measured. Then, the root opening, lateral root opening and diagonal spacing between the four spiral anchor rods in a single spiral anchor group are measured to determine the position of the cap plate. The purpose is to prevent large errors in the construction of the spiral anchors, which may result in the cap plate not being able to cover the four spiral anchor rods.

[0006] (2) Fix the line sweeper in the middle of the tower, and then sweep out the same height bright line for the four spiral anchor rods of each spiral anchor group at one time, and draw the bright line on the spiral anchor rod as the elevation line, the height of the elevation line is lower than the height of the connection hole at the upper end of the spiral anchor rod; then move the line sweeper to the outside of the tower, and repeatedly sweep out the bright line with the same height as the elevation line for the spiral anchor rod and mark it, so that the elevation line on each spiral anchor rod is circumferentially closed; ensure that the four spiral anchor groups and the spiral anchor rods in each spiral anchor group are at the same horizontal elevation after subsequent cutting;

[0007] (3) Cut off the upper end of the spiral anchor along the closed elevation line, remove the connection hole at the upper end of the spiral anchor, clean the slag and grind it to ensure the welding quality between the spiral anchor and the base plate;

[0008] (4) According to the position of the base plate determined in step (1), the base plate and the tower foot connector are installed. Furthermore, in step (4), the installation method of the base plate and the tower foot connector is as follows:

[0009] 1) Excavate a foundation pit at each spiral anchor group so that the spiral anchor group is in the middle of the foundation pit to facilitate the assembly of the stiffening plate and subsequent welding;

[0010] 2) Draw a center line at the upper end of the cap plate, and according to the cap plate position determined in step (1), place the cap plate on the spiral anchor rod processed in step (3), with one center line pointing toward the tower center to determine the position of the foundation;

[0011] 3) Draw a centerline on the upper end of the tower foot connector and place the tower foot connector on the base plate in step 2). The centerline of the tower foot connector coincides with the diagonal line of the base plate, and one centerline of the tower foot connector is parallel to the line direction. Ensure that the foundation and line directions are consistent, and the root opening and diagonal dimensions meet the standard requirements.

[0012] 4) Use a line scanner to scan the top of each tower foot connector, and use a level to measure the height of each tower foot to determine whether the height difference of each tower foot meets the standard requirements;

[0013] 5) First spot weld the spiral anchor and the cap plate, then spot weld the cap plate and the tower foot connector, and finally spot weld the stiffening plate between the spiral anchor and the cap plate;

[0014] 6) Based on step 5), the welding parts of the spiral anchor rods, base plates, stiffening plates and tower foot connectors are fully welded, then anti-corrosion treatment is performed, and finally the foundation pit is backfilled and compacted.

[0015] Furthermore, in step (2), the middle position in the tower is the tower center.

[0016] Beneficial effects of the present invention:

[0017] The present invention measures the position, root spacing and diagonal spacing of the spiral anchor group and the spiral anchor rods of each spiral anchor group after construction, and then determines the position of the base plate, thereby preventing the situation where the base steel plate cannot cover the spiral anchor rods due to large errors in the construction of the spiral anchor rods; a line scanner is used to mark the elevation line on the spiral anchor rod, and the connecting hole part at the upper end of the spiral anchor rod is cut off, while ensuring that the four tower legs are at the same horizontal elevation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a top view of the helical anchor group;

[0020] Figure 2 It is a top view of a single helical anchor group;

[0021] Figure 3 It is a structural diagram of the elevation line;

[0022] Figure 4 It is a top view of the base plate and tower foot connection parts;

[0023] Figure 5 This is the front view of the base plate and tower foot connection.

[0024] Spiral anchor 1, elevation line 2, center line I3, center line II4, base plate 5, tower foot connector 6, stiffening plate 7. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0026] A method for assembling a spiral anchor group includes the following steps:

[0027] (1) According to the design drawings, four spiral anchor groups are buried at the set positions. Each spiral anchor group includes four spiral anchor rods 1, such as Figure 1 As shown, measure the foundation positive root opening A, foundation lateral root opening B and diagonal spacing C between the four spiral anchor groups; Figure 2 As shown, the root opening a, lateral root opening b and diagonal spacing c between the four spiral anchor rods 1 in a single spiral anchor group are measured to determine the position of the cap plate 5. If the cap plate 5 is directly installed according to the designed position, it is easy for the cap plate 5 to fail to cover the four spiral anchor rods 1 in the spiral anchor group.

[0028] (2) Fix the line sweeper in the middle of the tower (the middle of the four spiral anchor groups, i.e. the center of the tower), and then sweep out the same height bright line on the four spiral anchor rods 1 of each spiral anchor group at one time, and use adhesive tape and a marker to draw the bright line on the spiral anchor rod 1 as the elevation line 2 (such as Figure 3 As shown in the figure, the height of the elevation line 2 is lower than the height of the connection hole at the upper end of the spiral anchor 1; then the line sweeper is moved to the outside of the tower, and after the bright line corresponds to the elevation line 2, the extension line of the elevation line 2 is traced for each spiral anchor 1 in the other direction of the bright line, so that the elevation line 2 on each spiral anchor 1 is circumferentially closed;

[0029] (3) Cut off the upper end of the spiral anchor rod 1 along the closed elevation line 2 (as shown in the figure). Figure 3 As shown), remove the connection hole at the upper end of the spiral anchor rod 1, clean the slag and grind it; the setting of the elevation line 2 is conducive to the four tower legs being at the same horizontal elevation after the upper end of the spiral anchor rod 1 is removed;

[0030] (4) According to the position of the pedestal plate 5 determined in step (1), install the pedestal plate 5 and the tower foot connector 6, as shown in FIG. Figure 4 and 5 The specific method is as follows:

[0031] 1) Use an excavator to dig a foundation pit (e.g., 3m×3m×1.6m) at each screw anchor group, so that the screw anchor group is in the middle of the foundation pit to facilitate the subsequent assembly and welding of the stiffening plate 7;

[0032] 2) Draw a center line I3 at the upper end of the cap plate 5, and according to the position of the cap plate 5 determined in step (1), place the cap plate 5 on the spiral anchor rod 1 processed in step (3), with one center line I3 pointing toward the tower center, to determine the position of the spiral anchor foundation;

[0033] 3) Draw a center line II4 at the upper end of the tower foot connector 6, and place the tower foot connector 6 on the base plate 5 in step 2), so that the center line II4 of the tower foot connector 6 coincides with the diagonal line of the base plate 5, and one center line II4 of the tower foot connector 6 is parallel to the line direction, so that the spiral anchor foundation and the line direction are consistent, and the root opening and diagonal dimensions meet the standard requirements;

[0034] 4) Use a line scanner to scan the top of each tower foot connector 6, and use a level to measure the height of each tower foot to determine whether the height difference of each tower foot meets the standard requirements;

[0035] 5) First spot weld the spiral anchor 1 and the cap plate 5, then spot weld the cap plate 5 and the tower foot connector 6, and finally spot weld the stiffening plate 7 between the spiral anchor 1 and the cap plate 5. Fix the position by spot welding to lay the foundation for welding;

[0036] 6) Based on step 5), the welding parts of the spiral anchor rod 1, the base plate 5, the stiffening plate 7 and the tower foot connector 6 are fully welded, and then anti-corrosion treatment is performed. Finally, the foundation pit is backfilled and compacted, and then the pull-out, compression and overturning resistance tests are carried out.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for assembling a spiral anchor group, characterized in that: The following steps are involved: (1) Four spiral anchor groups are buried in the set positions. Each spiral anchor group includes four spiral anchor rods. The foundation root opening, foundation lateral root opening and diagonal spacing between the four spiral anchor groups are measured. Then, the root opening, lateral root opening and diagonal spacing between the four spiral anchor rods in a single spiral anchor group are measured to determine the position of the base plate. (2) Fix the line sweeper in the middle of the tower, and then sweep out the same height bright line on the four spiral anchor rods of each spiral anchor group at one time, and draw the bright line on the spiral anchor rod as the elevation line. The height of the elevation line is lower than the height of the connection hole at the upper end of the spiral anchor rod; then move the line sweeper to the outside of the tower, and repeatedly sweep out the bright line with the same height as the elevation line on the spiral anchor rod and mark it, so that the elevation line on each spiral anchor rod is circumferentially closed; (3) Cut off the upper end of the spiral anchor along the closed elevation line, remove the connection hole at the upper end of the spiral anchor, clean the slag and grind it; (4) Install the base plate and tower foot connectors according to the base plate position determined in step (1).

2. A method for assembling a spiral anchor group according to claim 1, characterized in that: In step (4), the installation method of the base plate and tower foot connector is as follows: 1) Excavate a foundation pit at each spiral anchor group so that the spiral anchor group is in the middle of the foundation pit; 2) Draw a center line at the upper end of the cap plate, and place the cap plate on the spiral anchor rod processed in step (3) according to the cap plate position determined in step (1), with one center line facing the tower center; 3) Draw a center line on the upper end of the tower foot connector and place the tower foot connector on the base plate in step 2), with the center line of the tower foot connector coinciding with the diagonal line of the base plate and one center line of the tower foot connector parallel to the line direction; 4) Use a line scanner to scan the top of each tower foot connector, and use a level to measure the height of each tower foot to determine whether the height difference of each tower foot meets the standard requirements; 5) First spot weld the spiral anchor and the cap plate, then spot weld the cap plate and the tower foot connector, and finally spot weld the stiffening plate between the spiral anchor and the cap plate; 6) Based on step 5), the welding parts of the spiral anchor rods, base plates, stiffening plates and tower foot connectors are fully welded, then anti-corrosion treatment is performed, and finally the foundation pit is backfilled and compacted.

3. The method for assembling a spiral anchor group according to claim 1, characterized in that: In step (2), the middle position in the tower is the tower center.

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