Three-way adjusting device and method for spiral anchor foundation slab of power transmission tower

Abstract

The invention discloses a three-way adjusting device and method for a spiral anchor foundation bottom plate of a power transmission tower, and relates to the technical field of spiral anchor foundations of power transmission line towers. Comprising four tower legs arranged at the lower end of an iron tower body, and tower foot plates are arranged at the lower ends of the tower legs; the bottom of the adjusting device is connected with the spiral anchor foundation; the adjusting device comprises an upper support and a lower support; the upper support comprises a circular tower foot plate bottom plate, a first circular steel base plate and an upper adjusting plate; the bottom of the tower foot plate is fixedly connected with the upper part of the tower foot plate; the lower support comprises a circular lower adjusting plate, a second circular steel base plate and a spiral anchor top plate; the top of the spiral anchor foundation is fixedly connected with the bottom of the spiral anchor top plate; connection of the iron tower spiral anchor foundation can be conveniently adjusted in three directions on site in real time, and the situation that hole site reconstruction is abandoned due to the fact that deviation cannot be corrected can be effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to a spiral anchor foundation of a power transmission tower, in particular to a three-way adjusting device and method for the bottom plate of a spiral anchor foundation of a power transmission tower. BACKGROUND

[0002] The power transmission tower has four independent foundations, and the spiral anchor foundation is one of the commonly used foundation types, which has the convenience of mechanized construction, can be factory manufactured, transported in batches, and is widely used. The tower legs are connected to the top plate of the spiral anchor foundation through the foundation bolts, so that the tower legs form a whole force state and ensure the stable operation of the power transmission tower.

[0003] The spiral anchor foundation is usually constructed by a drilling machine. During the process of drilling the steel pile into the ground by the drilling machine, due to the limited equipment and construction precision, the positioning of the spiral anchor foundation cannot be guaranteed to be accurate, which leads to a large deviation between the four foundations and the tower foot, so that the hole position has to be abandoned and the tower has to be re-drilled or forcibly assembled, which may cause the tower to tilt and the partial rod to bend and deform, thereby causing hidden dangers to the normal operation of the power transmission line, and in severe cases, the tower may be relocated or the power transmission line may be relocated and newly built.

[0004] Therefore, it is necessary to adjust the deviation caused by the inaccurate positioning of the spiral anchor foundation or other reasons during construction and operation. Two methods are currently used, which have the following disadvantages.

[0005] 1. Special tower foot plate: special tower foot plates need to be customized according to the deviation of the top of the spiral anchor foundation pile, which has a complex production process, a long cycle, and high cost.

[0006] 2. Concrete cast-in-place bearing platform: a concrete bearing platform is added to the top of the spiral anchor foundation pile, and concrete needs to be mixed on site, which requires a large amount of material, complex construction and maintenance, a long cycle, and high cost.

[0007] The above two methods are one-time construction methods, and the foundation cannot be adjusted again during the later operation. SUMMARY

[0008] The present application overcomes the shortcomings of the prior art and provides a three-way adjusting device and method for the bottom plate of a spiral anchor foundation of a power transmission tower, which solves the technical problem of adjusting the inaccurate positioning of the spiral anchor foundation.

[0009] In order to achieve the above purpose, the present application is realized by the following technical scheme: A three-way adjusting device for the bottom plate of a spiral anchor foundation of a power transmission tower, which comprises four tower legs arranged at the lower end of the tower body, and a tower foot plate arranged at the lower end of the tower leg; the adjusting device is installed at the lower end of the tower foot plate, and the bottom of the adjusting device is connected to the spiral anchor foundation; the adjusting device comprises an upper support and a lower support; The upper support comprises a tower foot plate bottom, a first circular steel backing plate and an upper adjusting plate, all of which are circular. The tower foot plate bottom, the first circular steel backing plate and the upper adjusting plate are all provided with a plurality of first connecting screw holes in the circumferences thereof, and the first connecting screw holes in the tower foot plate bottom, the first circular steel backing plate and the upper adjusting plate correspond in position. The lower surface of the upper adjusting plate is symmetrically provided with two first parallel steel plates and two first steel plate supports. The first steel plate supports are located outside the first parallel steel plates and are perpendicular to the first parallel steel plates, and a plurality of second connecting screw holes are formed in the first parallel steel plates and the first steel plate supports. The lower support comprises a lower adjusting plate, a second circular steel backing plate and a spiral anchor top plate, all of which are circular. The lower surface of the upper adjusting plate is symmetrically provided with two first parallel steel plates and two first steel plate supports. The first parallel steel plates and the second parallel steel plates are embedded in each other and connected by bolts, and the first steel plate supports and the corresponding second steel plate supports are connected by bolts.

[0010] Further, a rectangular steel backing plate provided with corresponding bolt holes is inserted between the first steel plate supports and the corresponding second steel plate supports, and the first steel plate supports, the second steel plate supports and the rectangular steel backing plate are connected by bolts.

[0011] Further, the tower foot plate bottom, the first circular steel backing plate and the upper adjusting plate are circular with equal diameters, and the lower adjusting plate, the second circular steel backing plate and the spiral anchor top plate are circular with equal diameters.

[0012] Further, the two second parallel steel plates and the two second steel plate supports are symmetrically arranged left and right about the central axis of the lower adjusting plate.

[0013] Further, the two first parallel steel plates and the two first steel plate supports are symmetrically arranged left and right about the central axis of the upper adjusting plate.

[0014] Further, the number of the first connecting screw holes and the third connecting screw holes is 8-12.

[0015] Further, a row of second connecting screw holes is arranged on the first parallel steel plate; two second connecting screw holes are arranged on the first steel plate support; a row of fourth connecting screw holes is arranged on the second parallel steel plate; two fourth connecting screw holes are arranged on the second steel plate support.

[0016] A three-way adjustment method of a spiral anchor foundation base plate of a power transmission tower, which adopts the three-way adjustment device of the spiral anchor foundation base plate of the power transmission tower according to the application, and comprises the following steps: I. Vertical direction adjustment First step: first select a spiral anchor foundation, adjust the vertical direction offset value as needed, determine the number of first circular steel pads and second circular steel pads, and the first circular steel pads and the second circular steel pads have the same size; Second step: install the determined number of first circular steel pads and second circular steel pads in the upper support and the lower support respectively, for compensating the vertical direction offset value; Third step: according to the second step, sequentially adjust the heights of the remaining three spiral anchor foundations; II. Horizontal X and Y direction adjustment First step: first select a spiral anchor foundation, and determine the tower foot plate base plate rotation angle A according to the ratio of the horizontal X and Y direction offset values; Second step: after the tower foot plate base plate rotation angle, calculate the horizontal offset value of the clamping groove formed between the two first parallel steel plates, take the multiple B of the X and Y direction offset total value and the bolt pitch of the clamping groove, and determine the circular base plate clamping groove offset value, that is, the connection misalignment offset value C of the clamping groove formed between the two first parallel steel plates at the bottom of the upper support and the clamping groove formed between the two second parallel steel plates at the top of the lower support; Third step: down-regulate the rotation angle A of the lower adjustment plate; the lower adjustment plate, the second circular steel pad and the spiral anchor top plate are combined and connected through the connecting bolts of the lower support; Fourth step: connect the first parallel steel plate and the second parallel steel plate with bolts, at this time, the first parallel steel plate and the second parallel steel plate are connected with B misalignment screw holes, which satisfies the offset value C, and the purpose of adjusting the horizontal X and Y direction offset is achieved; at the same time, the first steel plate support and the corresponding second steel plate support are connected, and the gap between the first steel plate support and the corresponding second steel plate support is filled with a rectangular steel pad; Fifth step: combine and connect the tower foot plate base plate, the first circular steel pad and the upper adjustment plate through the connecting bolts of the upper support, at this time, the tower foot plate is arranged according to the normal position of the tower; Sixth step: sequentially install the horizontal X and Y direction adjustment of the remaining three spiral anchor foundations according to the above steps in sequence.

[0017] The beneficial effects of the present application relative to the prior art are: The present application has simple structure, low cost, and can conveniently adjust the connection of the spiral anchor foundation of the iron tower in three directions in real time on site, and is simple and easy to operate. It is especially suitable for use when the spiral anchor foundation deviates due to insufficient construction accuracy, can effectively solve the situation of abandoning the hole position and re-construction due to the inability to correct the deviation, and can also avoid forcibly assembling the iron tower, thereby saving engineering investment, ensuring the safe operation of the power transmission line, and having good safety and economy. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic diagram of the iron tower body; Figure 2 is a structural schematic diagram of the adjusting device; Figure 3 is a structural schematic diagram of the upper support; Figure 4 is a plan structural schematic diagram of the first circular steel base plate; Figure 5 is a bottom view of the upper adjusting plate; Figure 6 is a side view of the upper adjusting plate; Figure 7 is a side view of the first parallel steel plate; Figure 8 is a side view of the lower adjusting plate; Figure 9 is a top view of the lower adjusting plate; Figure 10 is a side view of the second parallel steel plate; Figure 11 is a side view of the lower support; Figure 12 is a structural schematic diagram of the rectangular steel base plate.

[0019] Reference signs: 1, iron tower body; 2, tower leg; 3, tower foot plate; 4, adjusting device; 5, spiral anchor foundation; 6, upper support; 601, tower foot plate bottom plate; 602, first circular steel base plate; 603, upper adjusting plate; 604, first connecting screw hole; 605, first parallel steel plate; 606, second connecting screw hole; 607, first steel plate support; 7, lower support; 701, lower adjusting plate; 702, second circular steel base plate; 703, spiral anchor top plate; 704, third connecting screw hole; 705, second parallel steel plate; 706, fourth connecting screw hole; 707, second steel plate support; 8, rectangular steel base plate. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, further detailed description of the present application is made in combination with embodiments and drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application. The technical solutions of the present application are described in detail below in combination with embodiments and drawings, but the protection scope is not limited thereto.

[0021] Referring to Figures 1 to 12 The embodiment provides a three-way adjusting device for a spiral anchor foundation bottom plate of a power transmission tower, the power transmission tower comprising a tower body 1; four tower legs 2 are arranged at the lower end of the tower body 1, and tower foot plates 3 are arranged at the lower ends of the tower legs 2; the adjusting device 4 is arranged at the lower end of the tower foot plate 3, and the bottom of the adjusting device 4 is connected with the spiral anchor foundation 5.

[0022] The adjusting device 4 comprises an upper support 6 and a lower support 7. The upper support 6 comprises a tower foot plate bottom plate 601, a first circular steel pad plate 602 and an upper adjusting plate 603; the tower foot plate bottom plate 601, the first circular steel pad plate 602 and the upper adjusting plate 603 are circular and have equal diameters; the bottom of the tower foot plate 3 is welded to the upper part of the tower foot plate bottom plate 601. A plurality of first connecting screw holes 604 are arranged on the tower foot plate bottom plate 601, the first circular steel pad plate 602 and the upper adjusting plate 603; the first connecting screw holes 604 are evenly distributed around the center; the first circular steel pad plate 602 is located between the tower foot plate bottom plate 601 and the upper adjusting plate 603; the tower foot plate bottom plate 601, the first circular steel pad plate 602 and the upper adjusting plate 603 are connected and fixed by bolts penetrating the first connecting screw holes 604 of the three; two first parallel steel plates 605 are symmetrically arranged on the lower surface of the upper adjusting plate 603 around the central axis; a row of second connecting screw holes 606 are arranged on the first parallel steel plate 605; a first steel plate support 607 is symmetrically arranged on the lower surface of the upper adjusting plate 603 around the central axis, the first steel plate support 607 is located outside the first parallel steel plate 605, and the first steel plate support 607 is perpendicular to the first parallel steel plate 605; two second connecting screw holes 606 are arranged on the first steel plate support 607.

[0023] The lower support 7 comprises a lower adjusting plate 701, a second circular steel pad plate 702 and a spiral anchor top plate 703; the lower adjusting plate 701, the second circular steel pad plate 702 and the spiral anchor top plate 703 are circular and have equal diameters; the top of the spiral anchor foundation 5 is welded to the bottom of the spiral anchor top plate 703. The third connecting screw holes 704 are arranged on the lower adjusting plate 701, the second circular steel gasket plate 702 and the spiral anchor top plate 703, and the third connecting screw holes 704 are evenly distributed with the center as the center; the second circular steel gasket plate 702 is located between the lower adjusting plate 701 and the spiral anchor top plate 703; the lower adjusting plate 701, the second circular steel gasket plate 702 and the spiral anchor top plate 703 are connected and fixed by bolts penetrating the third connecting screw holes 704 of the three; the upper surface of the lower adjusting plate 701 is provided with two second parallel steel plates 705 which are symmetrically arranged with the central axis as the center; a row of fourth connecting screw holes 706 are arranged on the second parallel steel plate 705; the upper surface of the lower adjusting plate 701 is provided with a second steel plate support 707 which is symmetrically arranged with the central axis as the center, the second steel plate support 707 is located outside the second parallel steel plate 705, and the second steel plate support 707 is perpendicular to the second parallel steel plate 705, and two fourth connecting screw holes 706 are arranged on the second steel plate support 707.

[0024] The upper adjusting plate 603 and the lower adjusting plate 701 are connected by bolts; specifically, the distance between the two first parallel steel plates 605 of the upper adjusting plate 603 is greater than the distance between the two second parallel steel plates 705 of the lower adjusting plate 701, and when the lower adjusting plate 701 is connected with the upper adjusting plate 603, the first parallel steel plate 605 and the second parallel steel plate 705 are embedded with each other, and the bolts are connected by penetrating the second connecting screw holes 606 on the first parallel steel plate 605 and the fourth connecting screw holes 706 on the second parallel steel plate 705. The second connecting screw holes 606 on the first parallel steel plate 605 and the fourth connecting screw holes 706 on the second parallel steel plate 705 are connected according to the direction of adjustment, and if a gap appears between the first steel plate support 607 and the corresponding second steel plate support 707 after connection, a rectangular steel gasket plate with a corresponding bolt hole is inserted between the first steel plate support 607 and the corresponding second steel plate support 707, and then the first steel plate support 607, the second steel plate support 707 and the rectangular steel gasket plate 8 are connected by bolts.

[0025] In the embodiment, the first circular steel gasket plate 602 and the second circular steel gasket plate 702 have the same structure: both are 1-2 cm thick circular steel plates, and 8-12 screw holes are arranged on the outer side, and the number of the steel gasket plates is increased or decreased according to the need of adjusting the height.

[0026] Due to the offset of the first parallel steel plate 605 in the upper adjusting plate and the second parallel steel plate 705 in the lower adjusting plate after the offset connection, the rectangular steel gasket plate 8 is a 1 cm thick rectangular steel plate, and two screw holes are arranged; due to the offset of the upper adjusting plate 603 and the lower adjusting plate 701, the rectangular steel gasket plate is used in the connection position of the first steel plate support 607 of the upper adjusting plate 603 and the second steel plate support 707 of the lower adjusting plate 701, and is used to fill the gap between the first steel plate support 607 and the second steel plate support 707, and the number of the rectangular steel gasket plates is determined according to the width of the gap to be filled.

[0027] The embodiment provides a three-way adjusting method for a spiral anchor foundation bottom plate of a power transmission tower: First, the offset of the center of the top surface of each tower four spiral anchor foundations is measured, including the vertical Z direction offset value, the horizontal X direction offset value and the horizontal Y direction offset value; if the offset is between 2-20 cm, the following steps are performed for adjustment, and less than 2 cm is not adjusted.

[0028] I. Vertical direction adjustment Step 1: Four sets of adjusting devices required for one tower are made, and the thickness size of each component of the upper support 6 and the lower support 7 and the number of bolt specifications are determined according to the tower foundation force calculation; Step 2: One spiral anchor foundation is selected first, the vertical direction offset value is adjusted as required, the number of 2 cm thick first circular steel pads 602 and second circular steel pads 702 is determined, the first circular steel pads 602 and the second circular steel pads 702 have the same size, the bolt hole diameter and position are the same as the tower foot plate bottom plate 601.

[0029] Step 3: The determined number of first circular steel pads 602 and second circular steel pads 702 are installed in the upper support 6 and the lower support 7 respectively, for compensating the vertical direction offset value.

[0030] Step 4: The remaining three spiral anchor foundation adjusting devices are installed in sequence according to the above steps.

[0031] II. Horizontal X and Y direction adjustment Step 1: One spiral anchor foundation is selected first, and the rotation angle of the tower foot plate bottom plate 601 is determined. Taking the example that 12 bolt holes are uniformly arranged on the tower foot plate bottom plate 601, one staggered hole is rotated by 30 degrees, two staggered holes are rotated by 60 degrees, and three staggered holes are rotated by 90 degrees. According to the ratio of the horizontal X and Y direction offset values, the rotation angle of the tower foot plate bottom plate 601 is determined. Taking the example that 8 bolt holes are arranged on the tower foot plate bottom plate 601, one staggered hole is rotated by 45 degrees, and two staggered holes are rotated by 90 degrees. According to the ratio of the horizontal X and Y direction offset values, the rotation angle A of the tower foot plate bottom plate 601 is determined, and the angle that the tower foot plate bottom plate 601 needs to be rotated (according to the angle that the tower foot plate bottom plate 601 can actually be rotated according to the number of bolt holes, the nearest principle is determined).

[0032] Second step: determine the offset value of the clamping groove formed between the two first parallel steel plates 605: after the rotation angle of the tower foot plate bottom plate 601, the horizontal offset value of the clamping groove formed between the two first parallel steel plates 605 is calculated, the offset value of the clamping groove of the circular bottom plate is determined, that is, the connection misalignment offset value C of the clamping groove formed between the two first parallel steel plates 605 at the bottom of the upper support 6 and the clamping groove formed between the two second parallel steel plates 705 at the top of the lower support 7, which is the multiple B of the clamping groove bolt pitch, rounded off.

[0033] Third step: combine the lower adjusting plate 701, the second circular steel pad plate 702 and the spiral anchor top plate 703 through the connecting bolts of the lower support 7, and note that the lower adjusting plate 701 needs to be rotated by an angle A at this time.

[0034] Fourth step: connect the first parallel steel plate 605 and the second parallel steel plate 705 with bolts, and note that the first parallel steel plate 605 and the second parallel steel plate 705 need to be misaligned by B screw holes at this time, which meets the offset value C and achieves the purpose of adjusting the horizontal offset. At the same time, the first steel plate support 607 and the corresponding second steel plate support 707 are connected, and the gap between the first steel plate support 607 and the corresponding second steel plate support 707 is filled with a rectangular steel pad plate 8.

[0035] Fifth step: combine the tower foot plate bottom plate 601, the first circular steel pad plate 602 and the upper adjusting plate 603 through the connecting bolts of the upper support 6, and note that the tower foot plate 3 is arranged according to the normal position of the iron tower at this time.

[0036] Sixth step: according to the above step sequence, sequentially install the remaining three spiral anchor foundation adjusting devices.

[0037] The present application has the advantages of simple structure, weight of a set of upper support 6 and lower support 7 within 100kg, fewer components, low cost, simple processing and convenient operation, which can adjust the connection of the iron tower and the spiral anchor foundation in three directions on the foundation construction site, and is reliable and easy to operate. Especially suitable for use when the spiral anchor foundation deviates due to insufficient construction precision, which can effectively solve the situation of giving up the hole position and re-construction due to the deviation that cannot be corrected, and can also avoid the method of forcibly assembling the iron tower, thereby saving engineering investment and ensuring the safe operation of the power transmission line. For 110kV and 220kV lines, the present application can save 100-150 thousand yuan per iron tower on average, the safety is effectively guaranteed, and good environmental and economic benefits are obtained.

[0038] The above is further detailed description of the present application in combination with specific preferred embodiments, and cannot be deemed as limitation of the specific embodiments of the present application. For those skilled in the art of the present application, without departing from the present application, a number of simple deductions or substitutions can be made, which shall be deemed to belong to the present application, and the patent protection scope is determined by the submitted claims.

Claims

1. A three-way adjusting device for the spiral anchor foundation base plate of a power transmission tower, comprising four tower legs (2) arranged at the lower end of the tower body (1) of the tower, and a tower foot plate (3) arranged at the lower end of the tower leg (2); characterized in that, The adjusting device (4) is installed at the lower end of the tower foot plate (3), and the bottom of the adjusting device (4) is connected with the screw anchor foundation (5); the adjusting device (4) comprises an upper support (6) and a lower support (7); The upper support (6) comprises a tower foot plate bottom plate (601), a first circular steel backing plate (602) and an upper adjusting plate (603), all of which are circular; A plurality of first connecting screw holes (604) are arranged on the tower foot plate bottom plate (601), the first circular steel backing plate (602) and the upper adjusting plate (603) in a circumferential direction; the first connecting screw holes (604) on the tower foot plate bottom plate (601), the first circular steel backing plate (602) and the upper adjusting plate (603) correspond in position; the first circular steel backing plate (602) is located between the tower foot plate bottom plate (601) and the upper adjusting plate (603); the tower foot plate bottom plate (601), the first circular steel backing plate (602) and the upper adjusting plate (603) are connected and fixed by bolts penetrating through the first connecting screw holes (604); The lower surface of the upper adjusting plate (603) is symmetrically provided with two first parallel steel plates (605) and two first steel plate supports (607); The first steel plate supports (607) are located outside the first parallel steel plates (605), and the first steel plate supports (607) are perpendicular to the first parallel steel plates (605); a plurality of second connecting screw holes (606) are arranged on the first parallel steel plates (605) and the first steel plate supports (607); The lower support (7) comprises a lower adjusting plate (701), a second circular steel backing plate (702) and a screw anchor top plate (703), all of which are circular; the top of the screw anchor foundation (5) is fixedly connected with the bottom of the screw anchor top plate (703); A plurality of third connecting screw holes (704) are arranged on the lower adjusting plate (701), the second circular steel backing plate (702) and the screw anchor top plate (703) in a circumferential direction; the third connecting screw holes (704) on the lower adjusting plate (701), the second circular steel backing plate (702) and the screw anchor top plate (703) correspond in position; the second circular steel backing plate (702) is located between the lower adjusting plate (701) and the screw anchor top plate (703); the lower adjusting plate (701), the second circular steel backing plate (702) and the screw anchor top plate (703) are connected and fixed by bolts penetrating through the third connecting screw holes (704); the upper surface of the lower adjusting plate (701) is symmetrically provided with two second parallel steel plates (705) and two second steel plate supports (707); the second steel plate supports (707) are located outside the second parallel steel plates (705), and the second steel plate supports (707) are perpendicular to the second parallel steel plates (705); a plurality of fourth connecting screw holes (706) are arranged on the second parallel steel plates (705) and the second steel plate supports (707); The first parallel steel plates (605) and the second parallel steel plates (705) are embedded in each other and connected by bolts, and the first steel plate supports (607) and the corresponding second steel plate supports (707) are connected by bolts.

2. The three-way adjusting device of the spiral anchor foundation base plate of a power transmission tower according to claim 1, characterized in that, The rectangular steel base plate (8) with bolt holes is arranged between the first steel plate support (607) and the corresponding second steel plate support (707), and the first steel plate support (607), the second steel plate support (707) and the rectangular steel base plate (8) are connected through bolts.

3. The three-way adjusting device of the spiral anchor foundation base plate of a power transmission tower according to claim 1, characterized in that, The tower foot plate bottom plate (601), the first circular steel base plate (602) and the upper adjusting plate (603) are circular with equal diameters; the lower adjusting plate (701), the second circular steel base plate (702) and the spiral anchor top plate (703) are circular with equal diameters.

4. The three-way adjusting device of the spiral anchor foundation base plate of a power transmission tower according to claim 1, characterized in that, The two second parallel steel plates (705) and the two second steel plate supports (707) are symmetrically arranged left and right of the central axis of the lower adjusting plate (701).

5. The three-way adjusting device of the spiral anchor foundation base plate of a power transmission tower according to claim 1, characterized in that, The two first parallel steel plates (605) and the two first steel plate supports (607) are symmetrically arranged left and right of the central axis of the upper adjusting plate (603).

6. The three-way adjusting device of the spiral anchor foundation base plate of a power transmission tower according to claim 1, characterized in that, The number of the first connecting screw holes (604) and the third connecting screw holes (704) is 8-12.

7. The three-way adjusting device of the spiral anchor foundation base plate of a power transmission tower according to claim 1, characterized in that, A row of second connecting screw holes (606) is arranged on the first parallel steel plate (605); two second connecting screw holes (606) are arranged on the first steel plate support (607); a row of fourth connecting screw holes (706) is arranged on the second parallel steel plate (705); two fourth connecting screw holes (706) are arranged on the second steel plate support (707).

8. A three-way adjusting method for a spiral anchor foundation base plate of a power transmission tower, characterized in that, The three-way adjusting device of the spiral anchor foundation bottom plate of the power transmission tower according to any one of claims 1-7 is adopted, and the following steps are included: I. Vertical direction adjustment First step: select a spiral anchor foundation, adjust the vertical direction offset value as needed, determine the number of the first circular steel base plate (602) and the second circular steel base plate (702), and the first circular steel base plate (602) and the second circular steel base plate (702) have the same size; Second step: install the determined number of the first circular steel base plate (602) and the second circular steel base plate (702) in the upper support (6) and the lower support (7) respectively, for compensating the vertical direction offset value; Third step: according to the second step, sequentially adjust the heights of the remaining three spiral anchor foundations; II. Horizontal X and Y direction adjustment First step: select a spiral anchor foundation, and determine the rotation angle A of the tower foot plate bottom plate (601) according to the ratio of the horizontal X and Y direction offset values; Second step: after the rotation of the tower foot plate bottom plate (601), calculate the horizontal offset value of the clamping groove formed between the two first parallel steel plates (605), take the multiple B of the offset value of the X and Y direction offset and the bolt spacing of the clamping groove, and determine the circular bottom plate clamping groove offset value, that is, the connection error offset value C of the clamping groove formed between the two first parallel steel plates (605) at the bottom of the upper support (6) and the clamping groove formed between the two second parallel steel plates (705) at the top of the lower support (7); Third step: rotate the lower adjusting plate (701) by the angle A; and the lower adjusting plate (701), the second circular steel base plate (702) and the spiral anchor top plate (703) are combined and connected through the connecting bolts of the lower support (7). Fourth step: connect the first parallel steel plate (605) and the second parallel steel plate (705) with bolts, at this time the first parallel steel plate (605) and the second parallel steel plate (705) are connected with B misaligned holes, which meet the offset value C, and achieve the purpose of adjusting the horizontal X and Y direction offset; At the same time, connect the first steel plate support (607) with the corresponding second steel plate support (707), and fill the gap between the first steel plate support (607) and the corresponding second steel plate support (707) with a rectangular steel pad (8); Fifth step: combine and connect the tower foot plate bottom plate (601), the first circular steel pad (602) and the upper adjusting plate (603) through the connecting bolts of the upper support (6), at this time the tower foot plate (3) is arranged according to the normal iron tower position; Sixth step: according to the above sequence of steps, sequentially install the remaining three screw anchor foundation horizontal X and Y direction adjustment.

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