A power tower and method of construction thereof

Abstract

The application provides a power tower and a construction method thereof, and relates to the technical field of power equipment. The power tower comprises a tower base and a prefabricated concrete foundation used in cooperation with the tower base. The top of the prefabricated concrete foundation is provided with a groove for accommodating the tower base and slurry. A support seat is arranged in the groove. The lower surface of the support seat and the bottom surface of the groove are connected through a spring. The shape and size of the upper surface of the support seat are the same as those of the lower surface of the tower base. Vertical anchor rods and inclined anchor rods are pre-embedded in the prefabricated concrete foundation. The upper ends of the vertical anchor rods extend into the groove and pass through first sleeves on the support seat. One end of the inclined anchor rod is cast in the prefabricated concrete foundation, and the other end extends into the groove in an oblique downward direction and is close to the edge of the upper surface of the support seat. Second sleeves corresponding to the first sleeves are arranged on the tower base. The application realizes the rapid alignment of the tower and the support seat, and the alignment is not affected by the weather.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and in particular to a power pole and its construction method. Background Technology

[0002] Power poles serve as support points for overhead power transmission lines. Existing power poles are typically constructed with shallow foundations, using an excavation and backfilling method. Anchor bolts can be used for reinforcement when necessary.

[0003] The inventors discovered that during the hoisting and installation of existing power poles, severe weather conditions such as strong winds often cause the hoisted poles to sway. When using prefabricated foundations with embedded anchor bolts, it is difficult to align the pole foundation with the anchor bolts within the prefabricated foundation, thus affecting construction efficiency. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a power pole and its construction method, which enables rapid alignment of the pole with pre-embedded anchor rods in the prefabricated foundation during construction, thus avoiding the impact of weather on construction.

[0005] To achieve the above objectives, a first aspect of the present invention provides a power pole, including a pole base and a precast concrete foundation for use with the pole base, wherein the top of the precast concrete foundation is provided with a groove for accommodating the pole base and grout.

[0006] A support base is provided in the groove, and the lower surface of the support base and the bottom surface of the groove are connected by a spring; the shape and size of the upper surface of the support base are the same as the shape and size of the lower surface of the tower foundation.

[0007] The precast concrete foundation is also pre-embedded with vertical anchors and inclined anchors; the upper end of the vertical anchor extends into the groove and passes through the first sleeve on the support seat; one end of the inclined anchor is cast into the precast concrete foundation, and the other end extends obliquely downward into the groove and is close to the edge of the upper surface of the support seat.

[0008] The base of the tower is also provided with a second sleeve corresponding to the first sleeve.

[0009] Preferably, the upper surface of the support base has an arc-shaped protrusion at its center, and the lower surface of the tower base has an arc-shaped groove at its center that matches the arc-shaped protrusion.

[0010] Preferably, the lower end of the vertical anchor rod extends through the precast concrete foundation and is fixed to the lower surface of the precast concrete foundation by a first metal baffle.

[0011] Preferably, when the tower base is hoisted onto the support, the vertical anchor rod passes through the tower base via a second sleeve and extends upwards, and is fixed to the tower base by a fastener.

[0012] Preferably, it also includes a horizontal anchor rod, which is cast in the precast concrete foundation. One end of the horizontal anchor rod is connected to the end of the inclined anchor rod that extends into the groove, and the other end extends out of the precast concrete foundation and is fixed to the side of the precast concrete foundation by a second metal baffle.

[0013] Preferably, the number of vertical anchor bolts, diagonal anchor bolts, and horizontal anchor bolts is multiple, and they are evenly and symmetrically distributed along the central axis of the tower foundation.

[0014] Preferably, it also includes horizontal bars, each horizontal bar being used to connect two symmetrically arranged horizontal anchor rods and to connect with vertical anchor rods.

[0015] Preferably, vertical anchor bolts, diagonal anchor bolts, horizontal anchor bolts, and horizontal bars are connected together to form a horizontal steel reinforcement network.

[0016] A second aspect of the present invention provides a method for constructing power poles, comprising the following steps:

[0017] Based on the dimensions of the precast concrete foundation, dig a pit at the location where the power pole will be installed to accommodate the precast concrete foundation.

[0018] The precast concrete foundation is hoisted into the pit, and the gap between the precast concrete foundation and the inside of the pit is backfilled and grouted.

[0019] The power pole is lifted, moved above the groove of the precast concrete foundation, and lowered. If the pole base and the support are not fully aligned, during the descent, the side of the pole base contacts the corresponding inclined anchor rod, and the pole base is aligned with the support rod by the guiding action of the inclined anchor rod.

[0020] Once the tower base is aligned and in contact with the support, continue lowering the power tower until the support fully supports the tower base.

[0021] The vertical anchor rods are fixed to the tower base using fasteners, and then horizontal reinforcement bars are welded together to form a horizontal steel reinforcement network.

[0022] Pour grout into the groove, and once the grout has solidified, the construction is complete. Then, loosen the connecting ropes for hoisting the power pole.

[0023] Preferably, soil or gravel is backfilled before grouting is poured into the groove.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. This invention provides a power pole and its construction method, which uses inclined anchor rods to limit the position of the pole base. The lower part of the inclined anchor rod is close to the edge of the upper surface of the connecting seat. Multiple inclined anchor rods can limit the position of the pole base in different directions, thus playing a guiding role. When the pole is hoisted and lowered, if the pole base and the support seat are not completely aligned, the edge of the pole base will first contact the inclined anchor rod and continue to descend along the inclined anchor rod until it contacts the support seat, thereby achieving rapid alignment without being affected by weather factors.

[0026] 2. This invention features matching arc-shaped protrusions and grooves on the upper surface of the support base and the lower surface of the tower base, enabling better alignment between the support base and the tower base. Once the tower base and support base are fully aligned, the second sleeve on the tower base and the first sleeve on the support base are aligned. As the power tower continues to be lowered, the spring is compressed, allowing the vertical anchor rod to pass through the tower base from the second sleeve.

[0027] 3. The present invention welds vertical anchors, inclined anchors, horizontal anchors and horizontal bars together to form a horizontal steel reinforcement network, and through the first metal baffle and the second metal baffle, the horizontal steel reinforcement network is made in contact with the external soil, thereby reducing the grounding resistance of the tower.

[0028] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0029] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0030] Figure 1 This is a schematic diagram showing the tower base not in contact with the support during hoisting.

[0031] Figure 2 This is a schematic diagram showing the tower base exactly in contact with the support during hoisting.

[0032] Figure 3 This is a schematic diagram of the structure after construction is completed;

[0033] Figure 4 This is a schematic diagram of the resulting horizontal steel reinforcement network.

[0034] Among them, 1. Tower base, 101. Second sleeve, 102. Arc-shaped groove, 2. Precast concrete foundation, 3. Groove, 4. Support seat, 401. First sleeve, 402. Arc-shaped protrusion, 5. Spring, 6. Vertical anchor, 7. Diagonal anchor, 8. First metal baffle, 9. Horizontal anchor, 10. Second metal baffle, 11. Horizontal reinforcement, 12. Grout. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0036] Example 1

[0037] like Figure 1 , Figure 2 , Figure 3 As shown, this embodiment provides a power pole, including a pole base 1 and a precast concrete foundation 2 used in conjunction with the pole base 1. The top of the precast concrete foundation 2 is provided with a groove for accommodating the pole base 1 and grout.

[0038] A support base 4 is provided in the groove 3. The lower surface of the support base 4 and the bottom surface of the groove are connected by a spring 5. The shape and size of the upper surface of the support base 4 are the same as the shape and size of the lower surface of the tower foundation.

[0039] In actual construction, the tower base is usually circular or square, and a matching support can be set according to the actual shape of the tower base. In this embodiment, the contact surfaces between the tower base and the support are made to have the same shape, thereby enabling better alignment of the tower base and the support in the subsequent construction.

[0040] The precast concrete foundation 2 is also pre-embedded with vertical anchor rods 6 and inclined anchor rods 7; the upper end of the vertical anchor rod 6 extends into the groove 3 and passes through the first sleeve 401 on the support seat 4; one end of the inclined anchor rod 7 is cast into the precast concrete foundation 2, and the other end extends obliquely downward into the groove 3 and is close to the edge of the upper surface of the support seat 4.

[0041] In addition, a second sleeve 101 corresponding to the first sleeve 401 is provided on the tower base 1 so that after installation, the vertical anchor rod 6 can pass through the first sleeve 401 and the second sleeve 101 to fix the tower base.

[0042] The precast concrete foundation 2 is a pre-cast concrete foundation. It is produced according to the shape of the base and the weight of the power pole to be installed, taking into account factors such as the actual needs. During precasting, vertical anchor rods 6 and diagonal anchor rods 7 are poured into the foundation, and multiple springs 5 ​​are evenly poured into the center of the bottom of the groove 3. Then, the support seat 4 is placed above the springs. Because the support seat 4 has a certain mass, the springs 5 ​​will be compressed downwards by a certain distance. The compression amount can be calculated in advance to determine the height of the upper surface of the support seat 4 after installation. During precasting, the lower part of the diagonal anchor rod 7 is made to contact the edge of the upper surface of the support seat 4 after installation, or slightly higher than the edge of the upper surface of the support seat 4.

[0043] The precast concrete foundation 2 uses inclined anchor rods 7 to limit the position of the tower base 1. Multiple inclined anchor rods 7 are evenly arranged around the groove 3, and these multiple anchor rods 7 can limit the position of the tower base 1 in different directions, serving a guiding function. In existing power tower hoisting construction, crosswinds often cause the hoisted tower to sway, making it impossible to accurately place it in the construction pit. This is especially true when bottom positioning holes are used for positioning in the construction pit, or when using precast foundations with pre-embedded anchor rods. Aligning the tower base with the positioning structure is difficult, causing significant inconvenience and affecting the construction progress.

[0044] When using the tower base and precast concrete foundation in this embodiment for hoisting construction, if the tower base and support are not fully aligned when the tower is hoisted down, the edge of the tower base will first contact the inclined anchor rod. At this time, the tower will continue to be lowered, and the tower will descend along the inclined anchor rod until it contacts the support rod, thereby achieving rapid alignment without being affected by weather factors.

[0045] Furthermore, in some embodiments, the upper surface of the support base 4 has an arc-shaped protrusion 402 at its center, and the lower surface of the tower base 1 has an arc-shaped groove 102 that matches the arc-shaped protrusion 402 at its center. The arc-shaped protrusion 402 and the arc-shaped groove 102 have the same shape, which better aligns the support base and the tower base, ensuring that the second sleeve and the first sleeve can be aligned. This guarantees that when the tower is hoisted onto the support base 4, the vertical anchor bolt can smoothly pass through the second sleeve.

[0046] When the tower base 1 is hoisted onto the support base 4, the vertical anchor rod 6 passes through the tower base 1 via the second sleeve 101 and extends upwards. The vertical anchor rod 6 is then fixed to the tower base 1 by a fastener.

[0047] The specifications and quantity of springs 5 ​​are determined based on the mass of the tower and the mass of the support base. It is necessary to ensure that when the weight of the tower itself is fully pressed on the support base 4, the amount of sinking of the support base (i.e. the compression of spring 5) is greater than the thickness of the tower base 1, so as to ensure that the upper end of the vertical anchor rod 6 completely penetrates the second sleeve 101 and extends upward, so as to fix the vertical anchor rod to the tower base through the fastener and ensure the stability of the overall structure.

[0048] Because power poles have requirements for grounding resistance, the higher the grounding resistance, the higher the probability of reverse flashover. Therefore, the grounding resistance cannot be too high. Thus, in some embodiments, the lower end of the vertical anchor 6 extends through the precast concrete foundation 2 and is fixed to the lower surface of the precast concrete foundation 2 by a first metal baffle 8.

[0049] In addition, in some embodiments, a horizontal anchor rod 9 is also embedded in the precast concrete foundation 2. The horizontal anchor rod 9 is cast in the precast concrete foundation 2, with one end connected to the end of the inclined anchor rod 7 that extends into the groove 3, and the other end passing through the precast concrete foundation 2 and fixed to the side of the precast concrete foundation 2 by the second metal baffle 10.

[0050] There are multiple vertical anchor bolts 6, inclined anchor bolts 7, and horizontal anchor bolts 9, which are evenly and symmetrically distributed along the central axis of the tower foundation.

[0051] To further reduce the grounding resistance of the tower, the vertical anchors 6, diagonal anchors 7, and horizontal anchors 9 can be connected together. For this purpose, multiple horizontal reinforcing bars 11 are also required. Each horizontal reinforcing bar 11 connects two symmetrically arranged horizontal anchors 9, and the positions of the vertical anchors 6, diagonal anchors 7, and horizontal anchors 9 need to be appropriately set so that the horizontal reinforcing bars 11 can also be connected to the vertical anchors 6. At this point, the vertical anchors 6, diagonal anchors 7, horizontal anchors 9, and horizontal reinforcing bars 11 are connected together to form a horizontal reinforcing steel network. Through the first and second metal baffles, the horizontal reinforcing steel network is brought into contact with the external soil, thereby significantly reducing the grounding resistance of the tower. Figure 4 As shown.

[0052] Figure 4 for Figures 1-3 From a top-down perspective, the diagram shows 16 horizontal anchor rods connected by 8 horizontal reinforcing bars, forming a horizontal steel reinforcement network. In actual construction, the above number can be flexibly adjusted according to factors such as the transmission voltage of the power pole, the resistivity of the external soil, and the resistivity of the grouting material.

[0053] In addition, in this embodiment, in order to ensure the stability of the overall structure, the groove of the precast concrete foundation has the same cross-sectional shape from top to bottom along the central axis, and the cross-sectional area gradually increases, that is, the groove is an inverted trumpet-shaped structure with a small upper part and a large lower part.

[0054] After all the structures are installed and welded, grout 12 is poured into the groove 3 and compacted by vibration, finally obtaining the complete tower structure.

[0055] Example 2

[0056] This embodiment, based on the power pole provided in Embodiment 1, provides a construction method for power poles, including the following steps:

[0057] Based on the dimensions of the precast concrete foundation, dig a pit at the location where the power pole will be installed to accommodate the precast concrete foundation.

[0058] The precast concrete foundation is hoisted into the pit, and the gap between the precast concrete foundation and the inside of the pit is backfilled and grouted.

[0059] The power pole is lifted, moved above the groove in the precast concrete foundation, and then lowered (corresponding to...). Figure 1 If the tower base and the support are not fully aligned, during the descent, the side of the tower base will contact the corresponding inclined anchor rod, and the tower base will be aligned with the support rod through the guiding action of the inclined anchor rod.

[0060] After the tower base and the support are aligned and fitted (corresponding to) Figure 2 (in the state of the power pole), continue to lower the power pole until the support base fully supports the pole base;

[0061] The vertical anchor rods are fixed to the tower base using fasteners, and then horizontal reinforcement bars are welded together to form a horizontal steel reinforcement network.

[0062] Pour grout into the groove, and once the grout has solidified, the construction is complete. Loosen the connecting ropes of the hoisting power pole, and the construction is finished. Figure 3 (State).

[0063] In some implementations, soil or gravel can be backfilled before grouting is poured into the groove. Backfilling with soil or gravel prevents the area below the support base 4 from being completely filled with grout. This prevents the spring 5 located below the support base from becoming completely ineffective, and provides some damping in the event of natural disasters such as earthquakes. This also gives the power pole a certain degree of earthquake resistance, further improving its stability.

[0064] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A power pole, characterized in that, It includes a tower base and a precast concrete foundation used in conjunction with the tower base, wherein the top of the precast concrete foundation has a groove for accommodating the tower base and grout. A support base is provided in the groove, and the lower surface of the support base and the bottom surface of the groove are connected by a spring; the shape and size of the upper surface of the support base are the same as the shape and size of the lower surface of the tower foundation. The precast concrete foundation is also pre-embedded with vertical anchors and inclined anchors; the upper end of the vertical anchor extends into the groove and passes through the first sleeve on the support seat; one end of the inclined anchor is cast into the precast concrete foundation, and the other end extends obliquely downward into the groove and is close to the edge of the upper surface of the support seat. The base of the tower is also provided with a second sleeve corresponding to the first sleeve.

2. A power pole as described in claim 1, characterized in that, The upper surface of the support base has an arc-shaped protrusion at its center, and the lower surface of the tower base has an arc-shaped groove at its center that matches the arc-shaped protrusion.

3. A power pole as described in claim 1, characterized in that, The lower end of the vertical anchor rod protrudes through the precast concrete foundation and is fixed to the lower surface of the precast concrete foundation by the first metal baffle.

4. A power pole as described in claim 1, characterized in that, When the tower base is hoisted onto the support, the vertical anchor rod passes through the tower base through the second sleeve and extends upwards. The vertical anchor rod is then fixed to the tower base by fasteners.

5. A power pole as described in claim 1, characterized in that, It also includes horizontal anchor bolts, which are cast in the precast concrete foundation. One end of the horizontal anchor bolt is connected to the end of the inclined anchor bolt that extends into the groove, and the other end extends out of the precast concrete foundation and is fixed to the side of the precast concrete foundation by a second metal baffle.

6. A power pole as described in claim 5, characterized in that, The number of vertical, diagonal, and horizontal anchors is multiple, and they are evenly and symmetrically distributed along the central axis of the tower foundation.

7. A power pole as described in claim 6, characterized in that, It also includes horizontal bars, each of which is used to connect two symmetrically arranged horizontal anchors and is connected to the vertical anchor.

8. A power pole as described in claim 7, characterized in that, Vertical anchor bolts, diagonal anchor bolts, horizontal anchor bolts, and horizontal bars are connected together to form a horizontal steel reinforcement network.

9. A construction method for a power pole tower based on claim 7 or 8, characterized in that, Includes the following steps: Based on the dimensions of the precast concrete foundation, dig a pit at the location where the power pole will be installed to accommodate the precast concrete foundation. The precast concrete foundation is hoisted into the pit, and the gap between the precast concrete foundation and the inside of the pit is backfilled and grouted. The power pole is lifted, moved above the groove of the precast concrete foundation, and lowered. If the pole base and the support are not fully aligned, during the descent, the side of the pole base contacts the corresponding inclined anchor rod, and the pole base is aligned with the support rod by the guiding action of the inclined anchor rod. Once the tower base is aligned and in contact with the support, continue lowering the power tower until the support fully supports the tower base. The vertical anchor rods are fixed to the tower base using fasteners, and then horizontal reinforcement bars are welded together to form a horizontal steel reinforcement network. Pour grout into the groove, and once the grout has solidified, the construction is complete. Then, loosen the connecting ropes for hoisting the power pole.

10. The construction method as described in claim 9, characterized in that, Before injecting grout into the groove, backfill with soil or gravel first, and then proceed with the grouting.

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