CN113851907A

CN113851907A - Internal grounding method based on embedded flat iron concrete pole

Info

Publication number: CN113851907A
Application number: CN202111216030.2A
Authority: CN
Inventors: 陈石川; 于新民; 李小刚; 刘志伟; 施孝霖; 林瑞宗; 陈祥; 傅本钊; 陈远浩; 聂克剑
Original assignee: Economic and Technological Research Institute of State Grid Fujian Electric Power Co Ltd
Current assignee: Economic and Technological Research Institute of State Grid Fujian Electric Power Co Ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2021-12-28

Abstract

The invention relates to an internal grounding method based on a pre-embedded flat iron concrete pole, which comprises the following steps: grounding points are arranged on the upper part and the lower part of the concrete pole; step two: embedding conductive flat iron welded with a reinforcement cage of the concrete pole at the grounding point of the concrete pole, wherein the outer end of the flat iron is communicated with the outer peripheral side of the concrete pole, the middle part of the flat iron is in threaded connection with a grounding bolt, and the inner end of the grounding bolt and the inner end of the flat iron are both welded with the reinforcement cage of the concrete pole; step three: the concrete pole is prefabricated in a factory, and the concrete pole is connected with various types of grounding terminals at the later stage through the grounding bolts to form a grounding loop.

Description

Internal grounding method based on embedded flat iron concrete pole

Technical Field

The invention relates to the field of pile foundation construction, in particular to an internal grounding method based on a pre-embedded flat iron concrete pole.

Background

The distribution line pole used in China mostly adopts a concrete pole. Taking the Fujian area as an example, the Fujian province is located in the southeast coastal region, the strong thunder area and the multiple thunder area account for 97% of the total area of the whole province, the coverage rate of the lightning arresters of the power distribution lines exceeds 27%, most of the lightning arresters of the lines are not provided with independent grounding devices, and the poles are naturally grounded. After lightning stroke 10kV overhead line caused the arrester to switch on, because tower head metal cross arm does not do equipotential with reinforced concrete pole inner structure reinforcing bar usually and is connected, lightning overvoltage discharged pole structure reinforcing bar at the cross arm position easily, caused the concrete on pole top layer to burst and drop, exposed inner structure reinforcing bar even. Under the erosion of long-term rainwater moisture etc., the naked structural reinforcement of pole corrodes gradually, influences pole mechanical strength.

And the pole of the outside ground connection's of round steel form, its ground connection downlead under the erosion of long-term rainwater moisture etc. under the erosion of the exposed structural reinforcement of pole corrosion long-term rainwater moisture etc. gradually, the exposed structural reinforcement of pole corrosion gradually.

Disclosure of Invention

Aiming at the defects, the invention provides an internal grounding method based on a pre-embedded flat iron concrete pole.

The invention solves the technical problem by adopting the scheme that an internal grounding method based on a pre-embedded flat iron concrete pole comprises the following steps:

the method comprises the following steps: grounding points are arranged on the upper part and the lower part of the concrete pole;

step two: embedding conductive flat iron welded with a reinforcement cage of the concrete pole at the grounding point of the concrete pole, wherein the outer end of the flat iron is communicated with the outer peripheral side of the concrete pole, the middle part of the flat iron is in threaded connection with a grounding bolt, and the inner end of the grounding bolt and the inner end of the flat iron are both welded with the reinforcement cage of the concrete pole;

step three: and grounding the lower end of a reinforcement cage of the concrete pole.

Further, the flat iron on the upper portion is arranged at a position 2 meters away from the tip top, and the flat iron on the lower portion is arranged at a position 0.5 meters above the buried deep line of the electric pole.

Further, the length direction of the flat iron is perpendicular to the axial direction of the concrete pole.

Furthermore, the main reinforcement of the reinforcement cage at the inner end of the flat iron is welded, and the main reinforcement and the inner hoop reinforcement are bound through iron wires to form the reinforcement cage.

Furthermore, when the flat iron is welded with the inner hoop, the overlapping length of the flat iron and the inner hoop is 6 times of the diameter of the inner hoop.

Compared with the prior art, the invention has the following beneficial effects: construction convenience, pole can be prefabricated to the pole, and inside ground connection, the corrosion resistance ability is stronger, and more pleasing to the eye, and simultaneously, the concrete pole is prefabricated in the mill, and the later stage only needs to be connected through earth bolt and each type ground terminal and forms ground return circuit.

Drawings

The invention is further described with reference to the following figures.

Fig. 1 is a schematic view of a structure of a concrete pole.

Fig. 2 is a schematic view of the installation position of the flat iron.

Fig. 3 is a schematic view of the connection structure of the flat iron and the reinforcement cage.

In the figure: 1-a concrete pole, 2-an earth point at the upper part of the pole, 3-an earth point at the lower part of the pole, 4-a flat iron, 5-a reinforcement cage, 6-a main reinforcement and 7-an inner stirrup; 8-a ground bolt; 9-nut.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1 to 3, an internal grounding method based on a pre-embedded flat iron concrete pole includes the following steps:

the method comprises the following steps:

grounding points

2 and 3 are arranged at the upper part and the lower part of the concrete pole 1;

step two: the method comprises the following steps that conductive flat irons 4 welded with a reinforcement cage of the concrete pole are embedded at the grounding point of the concrete pole, the outer ends of the flat irons are communicated with the outer peripheral side of the concrete pole, nuts 9 are welded at through holes in the middle of the flat irons, grounding bolts 8 are screwed on the nuts and are conveniently connected with various types of grounding terminals, and the inner ends of the grounding bolts and the inner ends of the flat irons are welded with the reinforcement cage of the concrete pole;

step three: grounding the lower end of a reinforcement cage of the concrete pole;

go up the band iron behind the concrete pole setting and pass through earth bolt, band iron, be connected the realization ground connection with the steel reinforcement cage of pole, the band iron passes through earth bolt, band iron down, is connected the realization with the steel reinforcement cage of pole and connects.

In the embodiment, the flat iron at the upper part is arranged at a position 2 meters away from the tip top, and the flat iron at the lower part is arranged at a position 0.5 meters above the buried deep line of the electric pole.

In this embodiment, the length direction of the flat iron is perpendicular to the axial direction of the concrete pole.

In this embodiment, 6 welding of main muscle of band iron inner steel reinforcement cage, main muscle and interior stirrup 7 form the steel reinforcement cage through the iron wire ligature, and interior stirrup and main muscle should adopt and be not less than #20 iron wire cross ligature, and the both ends are folded the bending into 60 jiaos and pass the ligature point, catch on both ends with the iron hook and rotate 5-6 circles, ensure the ligature firmness, and interior stirrup and main muscle ligature department all need scribble electric power fat, and the coating is thick and is not less than 0.2 mm.

In this embodiment, the length of the overlap between the flat iron and the inner hoop should be 6 times the diameter of the inner hoop when the flat iron is welded to the inner hoop.

If this patent discloses or refers to parts or structures that are fixedly connected to each other, the fixedly connected may be understood as: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In the description of this patent, it is to be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the patent, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

The above-mentioned preferred embodiments, further illustrating the objects, technical solutions and advantages of the present invention, should be understood that the above-mentioned are only preferred embodiments of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An internal grounding method based on a pre-buried flat iron concrete pole is characterized by comprising the following steps:

2. The internal grounding method based on the embedded flat iron concrete electric pole as claimed in claim 1, wherein: the flat iron on the upper part is arranged at a position 2 meters away from the tip top, and the flat iron on the lower part is arranged at a position 0.5 meters above the buried deep line of the electric pole.

3. The internal grounding method based on the embedded flat iron concrete electric pole as claimed in claim 1, wherein: the length direction of the flat iron is perpendicular to the axial direction of the concrete pole.

4. The internal grounding method based on the embedded flat iron concrete electric pole as claimed in claim 3, wherein the internal grounding method comprises the following steps: the main reinforcement of the reinforcing cage at the inner end of the flat iron is welded, and the main reinforcement and the inner hoop reinforcement are bound through iron wires to form the reinforcing cage.

5. The internal grounding method based on the embedded flat iron concrete electric pole as claimed in claim 4, wherein the internal grounding method comprises the following steps: when the flat iron is welded with the inner hoop, the lap length of the flat iron is 6 times of the diameter of the inner hoop.