Thunderstorm area lightning protection grounding system and construction method thereof

Abstract

The invention discloses a construction method of a lightning protection grounding system in a thunderstorm area, which is suitable for a building with a steel structure main body and comprises the following steps: driving a grounding electrode into a preset position and laying a third copper strip connected with the grounding electrode; welding a bearing platform foundation reinforcement cage in the building and cast-in-place pile reinforcements below the bearing platform foundation reinforcement cage through round steel; the bearing platform foundation reinforcement cages are connected through a plurality of first copper strips to form a grounding network; connecting the other end of the third copper strip connected to the grounding electrode to a grounding network; installing a plurality of lightning protection grounding test points according to a drawing, and respectively connecting the lightning protection grounding test points to the grounding network through a fourth copper strip; an aluminum strip network is arranged on a roof of a building, a plurality of grounding leading-down points are arranged on the periphery of the aluminum strip network, and lightning rods are installed at the grounding leading-down points. Correspondingly, the invention further provides a thunderstorm area lightning protection grounding system. The lightning protection device can prevent lightning stroke from endangering personal safety, plant equipment from being directly influenced by lightning stroke or induction lightning to be damaged and even cause plant fire and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning protection, and in particular to a lightning protection grounding system in a thunderstorm area and a construction method thereof. Background Art

[0002] Thunderstorms are local convective weather accompanied by lightning and thunder, discharges in the atmosphere, usually accompanied by heavy rain and local strong winds. Lightning strikes endanger personal safety, building and equipment safety, and sometimes cause fires. In some areas at home and abroad, the number of thunderstorm days can reach 60-150 days per year, which is extremely risky.

[0003] Improving the reliability of lightning protection grounding in thunderstorm areas can prevent lightning strikes from endangering personal safety, as well as preventing building equipment from being damaged by direct lightning strikes or the influence of induced lightning and causing building fires.

[0004] In traditional lightning protection and grounding technology, only lightning rods are installed on the roof of the building and grounding flat steel is used to form a grounding grid underground. Due to the large area of ​​industrial buildings, the coverage of lightning rods is not good. In addition, due to the poor conductivity of flat steel, the reliability of the grounding grid is insufficient, which will increase the occurrence of thunderstorm accidents, especially in thunderstorm areas, which can easily cause personal injury, equipment accidents and even building fires. Summary of the invention

[0005] In view of the above technical problems, the present invention provides a lightning protection grounding system in a thunderstorm area to improve the reliability of the lightning protection grounding system in the thunderstorm area, avoid lightning strikes endangering personal safety, and avoid factory equipment being directly struck by lightning or affected by induced lightning and being damaged or even causing factory fires. Correspondingly, the present invention also provides a construction method for the lightning protection grounding system in a thunderstorm area.

[0006] According to one aspect of the present invention, a lightning protection grounding system for thunderstorm areas is provided, which is applicable to buildings with steel structures as main bodies. The lightning protection grounding system comprises:

[0007] The roof lightning protection net includes an aluminum belt network formed by a plurality of aluminum belts connected in a crisscross pattern. A plurality of grounding points are arranged around the aluminum belt network, and lightning rods are installed at the grounding points.

[0008] A grounding network, comprising a plurality of cap foundation steel cages in a building, wherein the plurality of cap foundation steel cages are connected by a plurality of first copper strips;

[0009] A cast-in-place pile is located below the cap foundation steel cage, wherein the cap foundation steel cage is connected to the steel bars in the cast-in-place pile by lap welding of round steel;

[0010] A steel structure column, the upper part of which is connected to the grounding lead-in point through an aluminum strip, and the lower part of which is connected to the cap foundation steel cage through a second copper strip;

[0011] a plurality of grounding electrodes, each connected to the grounding network through a third copper tape; and

[0012] A plurality of lightning protection grounding test points are respectively connected to the grounding network through a fourth copper tape.

[0013] According to another aspect of the present invention, a construction method of a lightning protection grounding system in a thunderstorm area is provided, which is applicable to a building with a steel structure as the main body, and the construction method comprises:

[0014] Driving a grounding electrode at a preset position and laying a third copper tape connected to the grounding electrode;

[0015] Weld the steel cage of the foundation of the building with the steel bars of the cast-in-place piles below it through round steel;

[0016] Connecting the steel cages of the foundation of each cap through a plurality of first copper strips to form a grounding network;

[0017] Connect the other end of the third copper tape connected to the ground electrode to the ground network;

[0018] Install several lightning protection grounding test points according to the drawings, and connect them to the grounding network through a fourth copper tape respectively;

[0019] Leading out a plurality of second copper strips from the grounding network and welding them to a steel structure column respectively;

[0020] An aluminum tape network is laid on the roof of the building, and a plurality of grounding points are arranged around the aluminum tape network, and lightning rods are installed at the grounding points; and

[0021] Aluminum strips are led out from a plurality of grounding points of the aluminum strip network and are respectively welded to one of the steel structure columns.

[0022] In one embodiment of the present invention, at least three anchor bars in the cast-in-place pile are welded to the cap foundation reinforcement cage, and the welding length is not less than 6 times the diameter of the round steel.

[0023] In one embodiment of the present invention, the width*thickness of the copper strip is 25 mm×3 mm.

[0024] The present invention also provides another lightning protection grounding system for thunderstorm areas, which is suitable for buildings with concrete main bodies. The lightning protection grounding system comprises:

[0025] The roof lightning protection net includes an aluminum belt network formed by a plurality of aluminum belts connected in a crisscross pattern. A plurality of grounding points are arranged around the aluminum belt network, and lightning rods are installed at the grounding points.

[0026] A plurality of grounding electrodes are respectively arranged beside a concrete column and connected to a grounding copper strip;

[0027] A grounding network, formed by connecting the grounding copper strips connected to the grounding electrodes to each other through a plurality of first copper strips;

[0028] A plurality of grounding down conductors are respectively arranged in a concrete column of the building; the grounding down conductors include a down conductor aluminum strip leading upward from the concrete column and a grounding copper strip leading from the grounding electrode, the down conductor aluminum strip is connected upward to the grounding down conductor point, and is connected downward to the grounding copper strip through a bimetallic connector; the grounding copper strip is also connected to a lightning strike counter;

[0029] A plurality of lightning protection grounding test points are respectively connected to the grounding network through a fourth copper tape.

[0030] Accordingly, the present invention also provides a construction method of a lightning protection grounding system in a thunderstorm area, which is applicable to a building with a concrete main body, and the construction method comprises:

[0031] Driving a grounding electrode at a predetermined position and laying a grounding copper tape connected to the grounding electrode;

[0032] A grounding down conductor is embedded in a plurality of concrete columns, wherein the grounding down conductor comprises a down conductor aluminum strip extending upward from the concrete column and a grounding copper strip extending from a grounding electrode, wherein the down conductor aluminum strip is connected upward to the grounding down conductor point and downward to the grounding copper strip through a bimetallic connector; the grounding copper strip is also connected to a lightning strike counter;

[0033] Connecting the grounding copper strips led out from the grounding electrode through a plurality of first copper strips to form a grounding network;

[0034] Install several lightning protection grounding test points according to the drawings, and connect them to the grounding network through a second copper tape respectively;

[0035] An aluminum tape network is laid on the roof of the building, and a plurality of grounding points are arranged around the aluminum tape network, and lightning rods are installed at the grounding points; and

[0036] The aluminum down conductors led out from the concrete column are connected to a ground down conductor point respectively.

[0037] The present invention can improve the reliability of the lightning protection grounding system in thunderstorm areas, avoid lightning strikes endangering personal safety, and avoid plant equipment being directly struck by lightning or affected by induced lightning and being damaged or even causing plant fires. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present invention, and together with the specification are used to explain the principles of the present invention. Obviously, the accompanying drawings described below are only some embodiments of the present invention, and for those of ordinary skill in the art, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0039] Figure 1 It is a schematic diagram of the connection between the cap foundation reinforcement cage and the cast-in-place pile reinforcement in one embodiment of the present invention.

[0040] Figure 2 It is a schematic diagram of the connection between the foundation steel cage of the cap and the first copper strip in one embodiment of the present invention.

[0041] Figure 3 It is a schematic diagram of the connection between the lightning protection grounding test point and the foundation steel cage of the pedestal in one embodiment of the present invention.

[0042] Figure 4 It is a schematic diagram of the connection between the roof lightning protection network and the grounding network in one embodiment of the present invention.

[0043] Figure 5 It is a schematic diagram of the arrangement of lightning protection grounding test points and grounding network in one embodiment of the present invention.

[0044] Figure 6 It is a schematic diagram of the layout of the roof lightning protection network in one embodiment of the present invention.

[0045] Figure 7 It is a schematic diagram of the connection between the down-lead aluminum strip and the grounding copper strip in one embodiment of the present invention.

[0046] Figure 8 It is a schematic diagram of the arrangement of lightning protection grounding test points and grounding network in another embodiment of the present invention.

[0047] Fig. 9 It is a schematic diagram of the layout of the roof lightning protection network in another embodiment of the present invention.

[0048] In the figure: 1- foundation steel cage; 2- cast-in-place pile steel; 3- round steel; 4- second copper strip; 5- first copper strip; 6- lightning protection grounding test point; 7- fourth copper strip; 8- steel structure column; 9- roof; 10- grounding lead-in point; 11- aluminum strip; 12- grounding network; 13- aluminum strip network; 14- aluminum strip lead-in; 15- grounding copper strip; 16- bimetallic connector; 17- lightning strike counter; 18- concrete column; 19- ground; 20- grounding electrode. DETAILED DESCRIPTION

[0049] In order to make the description of the present invention more detailed and complete, reference may be made to the accompanying drawings and various embodiments described below, in which the same numbers represent the same or similar components. On the other hand, well-known components and steps are not described in the embodiments to avoid unnecessary limitations on the present invention. In the embodiments and claims, the description of "connection" may generally refer to a component being indirectly coupled to another component through other components, or a component being directly connected to another component without passing through other components. In the embodiments and claims, unless the article is specifically limited in the text, "one" and "the" may generally refer to a single or multiple. "About", "approximately" or "roughly" as used herein is used to modify any quantity that can be slightly changed, but such slight changes do not change its essence. In the embodiments, if there is no special description, the error range of the numerical value modified by "about", "approximately" or "roughly" is generally allowed within 20%, preferably within 10%, and more preferably within 5%.

[0050] Example 1

[0051] According to one aspect of the present invention, a lightning protection grounding system for thunderstorm areas is provided, which is applicable to buildings with steel structures as main bodies. Figure 1-6 As shown, the lightning protection grounding system includes: a roof lightning protection net, a grounding network 12, a steel structure column 8, a cast-in-place pile, a plurality of grounding electrodes, and a plurality of lightning protection grounding test points 6. The roof lightning protection net includes an aluminum belt network 13 formed by a plurality of aluminum belts connected in a crisscross pattern, and a plurality of grounding lead-in points 10 are arranged around the aluminum belt network 13, and a lightning rod is installed on the grounding lead-in point 10. The grounding network 12 includes a plurality of cap foundation steel cages 1 in the building, and the plurality of cap foundation steel cages 1 are connected by a plurality of first copper belts 5. The cast-in-place pile is located below the cap foundation steel cage 1, and the cap foundation steel cage 1 is connected to the steel bars 2 of the cast-in-place pile by lap welding through round steel 3. The upper part of the steel structure column 8 is connected to the grounding lead-in point 10 through an aluminum belt, and the lower part is connected to the cap foundation steel cage 1 through a second copper belt 4. The plurality of grounding electrodes are respectively connected to the grounding network 12 through a third copper belt; and the plurality of lightning protection grounding test points 6 are respectively connected to the grounding network 12 through a fourth copper belt 7. The first copper belt 5 and the third copper belt can be connected to the second copper belt 4 .

[0052] The present invention can improve the reliability of the lightning protection grounding system in thunderstorm areas, avoid lightning strikes endangering personal safety, and avoid plant equipment being directly struck by lightning or affected by induced lightning and being damaged or even causing plant fires.

[0053] Example 2

[0054] According to another aspect of the present invention, a construction method for a lightning protection grounding system in a thunderstorm area is provided, which is suitable for buildings with a steel structure as the main body, generally industrial plants with large steel structure columns, and is combined with Figure 1-6 As shown, the construction method includes:

[0055] S1, driving a grounding electrode at a preset position and laying a third copper tape connected to the grounding electrode.

[0056] Specifically, the grounding electrode is laid according to the actual situation on site, and the distance from the grounding electrode to the outer wall of the building is not less than 1 meter. Before laying the grounding electrode 20, dig a trench along the preset line to drive in the grounding electrode and lay the copper strips connecting these grounding electrodes. The top of the grounding electrode should be no less than 0.6m from the ground 19. Measure and mark the line according to the design requirements, and then dig with the line. Generally, the trench depth is 0.8-1.0m, the upper width of the trench is 0.8m, and the bottom width is 0.6m. The trench should be dug straight, the depth is consistent, and the trench bottom is required to be flat. The width and thickness of the copper strip are preferably 25mm×3mm.

[0057] S2, welding the foundation steel cage 1 in the building to the cast-in-place pile steel bars 2 below it through round steel 3.

[0058] Furthermore, S2 includes: welding at least three anchor bars in the cast-in-place pile to the cap foundation steel cage 1, and the welding length is not less than 6 times the diameter of the round steel 3.

[0059] S3, connecting the foundation steel cages 1 of each cap foundation through a plurality of first copper strips 5 to form a grounding network 12.

[0060] Specifically, all the cap foundation reinforcement cages 1 are connected together through 25 mm×3 mm copper strips to form a grounding network 12 .

[0061] S4, connecting the other end of the third copper strip connected to the grounding electrode to the grounding network 12; the connection method adopts a T-type joint and exothermic welding method.

[0062] S5, install a number of lightning protection grounding test points 6 according to the drawings, and connect them to the grounding network 12 through a 25mm×3mm copper tape respectively.

[0063] S6, a plurality of second copper strips 4 are led out from the grounding network 12 and welded to a steel structure column 8 respectively.

[0064] Specifically, a 25mm×3mm copper tape is used to lead the grounding grid to a position of +300mm at the position of each steel structure column 8, and after the steel structure column 8 is installed, the second copper tape 4 is welded to the steel structure column 8;

[0065] S7, an aluminum tape network 13 is laid on the roof 9 of the building, and a plurality of grounding points 10 are arranged around the aluminum tape network 13, and lightning rods are installed on the grounding points 10.

[0066] Specifically, after the construction of the factory roof tiles is completed, aluminum strips are laid on the roof 9 in the east-west and north-south directions according to the drawings to form a roof lightning protection network, and lightning rods are installed at the grounding point 10.

[0067] S8, aluminum strips are led out from several grounding points 10 of the aluminum strip network 13 and welded to one of the steel structure columns 8 respectively.

[0068] Specifically, the steel structure column 8 of the factory building is used as the grounding lead, and the aluminum strip led down from the roof lightning protection net is welded to the steel structure column 8 by exothermic welding, so as to connect the roof lightning protection net with the underground grounding network 12 through the steel structure column 8.

[0069] Those skilled in the art should be aware that before the implementation of the present invention, the construction site should be fully prepared. For example, the soil resistivity test should be carried out first to understand the composition of the soil on site. The soil resistance value can be calculated from the test results and theory to verify whether the designed system can meet the minimum ohm requirement. Then, a project construction plan is prepared, and personnel, machinery (electric grinding wheels, electric drills, jack compactors, soil drilling machines, electric cutting machines, screwdrivers, adjustable wrenches, multimeters, exothermic welding equipment, ground resistance insulation megohmmeters, etc.), materials (copper strips, aluminum strips, weldable DC clamps, metal test points, lightning rods, grounding rods, etc.) and Technical preparation work.

[0070] The present invention can improve the reliability of the lightning protection grounding system in thunderstorm areas, avoid lightning strikes endangering personal safety, and avoid plant equipment being directly struck by lightning or affected by induced lightning and being damaged or even causing plant fires.

[0071] 1. Specifically, the lightning protection of the building roof of the present invention adopts the method of aluminum strip plus lightning rod, so that the lightning protection system of the roof is more reliable. As the lightning protection system of large industrial plants, it is more reliable and can effectively protect the plant of tens of thousands of square meters. When lightning directly hits the plant in thunderstorm weather, the lightning current quickly flows from the roof lightning protection network through the steel structure column 8 (acting as the grounding down conductor), the grounding electrode, and the grounding network 12 to the earth, thereby effectively protecting the personnel and equipment in the plant and other buildings, and improving the lightning protection reliability compared with the traditional technology. In addition, the connection method of the copper strip and the aluminum strip with the steel structure column 8 and the foundation steel cage adopts the method of exothermic welding (exothermic welding), so that the connection is more reliable, and the connection position is not easy to oxidize, and the conductivity is better. The underground grounding grid adopts copper strip instead of traditional galvanized flat steel, so that the construction is faster, and the conductivity of the copper strip far exceeds that of the galvanized flat steel, which can improve the reliability of the grounding system, and is easier to transport and operate on site than the galvanized flat steel.

[0072] Example 3

[0073] The present invention also provides another lightning protection grounding system for thunderstorm areas, which is suitable for buildings with concrete bodies, such as Figure 7-9 As shown, the lightning protection grounding system includes: a roof lightning protection network, a plurality of grounding down conductors, a plurality of grounding electrodes 20, a grounding network 12 and a plurality of lightning protection grounding test points 6. The roof lightning protection network includes an aluminum strip network 13 formed by a plurality of aluminum strips connected in a crisscross pattern, and a plurality of grounding down conductors 10 are arranged around the aluminum strip network, and a lightning rod is installed on the grounding down conductors 10. The plurality of grounding electrodes 20 are respectively arranged beside a concrete column 18 and connected to a grounding copper strip 15. The grounding network 12 is formed by connecting the grounding copper strips 15 connected to the grounding electrodes 20 to each other through a plurality of first copper strips 5. The plurality of grounding down conductors are respectively arranged in a concrete column 18 of the building; the grounding down conductors include a down conductor aluminum strip 14 leading out of the concrete column 18 upward and a grounding copper strip 15 led out of the grounding electrode, the down conductor aluminum strip 14 is connected to the grounding down conductor 10 upward, and is connected to the grounding copper strip 15 downward through a bimetallic connector 16; the grounding copper strip 15 is also connected to a lightning strike counter 17. The plurality of lightning protection grounding test points 6 are respectively connected to the grounding network 12 via a fourth copper tape 7 .

[0074] The present invention can improve the reliability of the lightning protection grounding system in thunderstorm areas, avoid lightning strikes endangering personal safety, and avoid plant equipment being directly struck by lightning or affected by induced lightning and being damaged or even causing plant fires.

[0075] Example 4

[0076] The technical solution of this embodiment and that of Embodiment 2 are formed based on the same inventive concept, and the details of the same construction steps are not repeated in this embodiment.

[0077] The present invention also provides a construction method for a lightning protection grounding system in a thunderstorm area, which is suitable for buildings with a concrete main body (generally an office building), and is combined with Figure 7-9 As shown, the construction method includes:

[0078] S100, driving a grounding electrode 20 at a preset position and laying a grounding copper tape 15 connected to the grounding electrode 20;

[0079] S200, pre-buried grounding down conductors in a plurality of concrete columns 18, the grounding down conductors comprising a down-conducting aluminum strip 14 leading upward out of the concrete column 18 and a grounding copper strip 15 leading out of a grounding electrode, the down-conducting aluminum strip 14 being connected upwardly to the grounding down-conducting point 10, and being connected downwardly to the grounding copper strip 15 through a bimetallic connector 16; the grounding copper strip 15 is also connected to a lightning strike counter 17;

[0080] S300, connecting the grounding copper strips 15 led out from the grounding electrode 20 through a plurality of first copper strips 5 to form a grounding network 12;

[0081] S400, installing a plurality of lightning protection grounding test points according to the drawings, and connecting them to the grounding network through a fourth copper tape 7 respectively;

[0082] S500, laying an aluminum tape network 13 on the roof of the building, with a plurality of grounding points being arranged around the aluminum tape network, and a lightning rod being installed on the grounding points 10; and

[0083] S600, the aluminum down conductors 14 led out from the concrete column 18 are connected to a ground down conductor point respectively.

[0084] The present invention can improve the reliability of the lightning protection grounding system in thunderstorm areas, avoid lightning strikes endangering personal safety, and avoid plant equipment being directly struck by lightning or affected by induced lightning and being damaged or even causing plant fires.

[0085] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A lightning protection grounding system for thunderstorm areas, suitable for buildings with steel structures, characterized in that: include: The roof lightning protection net includes an aluminum strip network formed by a plurality of aluminum strips connected in a crisscross pattern, and a plurality of grounding points are arranged around the aluminum strip network, and lightning rods are installed at the grounding points; A grounding network, comprising a plurality of cap foundation steel cages in a building, wherein the plurality of cap foundation steel cages are connected by a plurality of first copper strips; A cast-in-place pile is located below the cap foundation steel cage, wherein the cap foundation steel cage is connected to the steel bars in the cast-in-place pile by lap welding of round steel; A steel structure column, the upper part of which is connected to the grounding lead-in point through an aluminum strip, and the lower part of which is connected to the cap foundation steel cage through a second copper strip; a plurality of grounding electrodes, each connected to the grounding network through a third copper tape; and A plurality of lightning protection grounding test points are respectively connected to the grounding network through a fourth copper tape.

2. A construction method for a lightning protection grounding system in a thunderstorm area, suitable for buildings with a steel structure as the main body, characterized in that: include: Driving a grounding electrode at a preset position and laying a third copper tape connected to the grounding electrode; Weld the steel cage of the foundation of the building with the steel bars of the cast-in-place piles below it through round steel; Connecting the steel cages of the foundation of each cap through a plurality of first copper strips to form a grounding network; Connect the other end of the third copper tape connected to the ground electrode to the ground network; Install several lightning protection grounding test points according to the drawings, and connect them to the grounding network through a fourth copper tape respectively; Leading out a plurality of second copper strips from the grounding network and welding them to a steel structure column respectively; An aluminum tape network is laid on the roof of the building, and a plurality of grounding points are arranged around the aluminum tape network, and lightning rods are installed at the grounding points; as well as Aluminum strips are led out from a plurality of grounding points of the aluminum strip network and are respectively welded to one of the steel structure columns.

3. The construction method according to claim 2, characterized in that: Weld at least three anchor bars in the cast-in-place pile to the steel cage of the cap foundation, and the welding length shall not be less than 6 times the diameter of the round steel.

4. The construction method according to claim 2, characterized in that: The width and thickness of the copper strip are 25 mm × 3 mm.

5. A lightning protection grounding system for thunderstorm areas, suitable for buildings with concrete bodies, characterized in that: include: The roof lightning protection net includes an aluminum belt network formed by a plurality of aluminum belts connected in a crisscross pattern. A plurality of grounding points are arranged around the aluminum belt network, and lightning rods are installed at the grounding points. A plurality of grounding electrodes are respectively arranged beside a concrete column and connected to a grounding copper strip; A grounding network, formed by connecting the grounding copper strips connected to the grounding electrodes to each other through a plurality of first copper strips; A plurality of grounding down conductors are respectively arranged in a concrete column of the building; the grounding down conductors include a down conductor aluminum strip leading upward from the concrete column and a grounding copper strip leading from the grounding electrode, the down conductor aluminum strip is connected upward to the grounding down conductor point, and is connected downward to the grounding copper strip through a bimetallic connector; the grounding copper strip is also connected to a lightning strike counter; A plurality of lightning protection grounding test points are respectively connected to the grounding network through a fourth copper tape.

6. A construction method for a lightning protection grounding system in a thunderstorm area, suitable for a building with a concrete main body, characterized in that: include: Driving a grounding electrode at a predetermined position and laying a grounding copper tape connected to the grounding electrode; A grounding down conductor is embedded in a plurality of concrete columns, wherein the grounding down conductor comprises a down conductor aluminum strip extending upward from the concrete column and a grounding copper strip extending from a grounding electrode, wherein the down conductor aluminum strip is connected upward to the grounding down conductor point and downward to the grounding copper strip through a bimetallic connector; the grounding copper strip is also connected to a lightning strike counter; Connecting the grounding copper strips led out from the grounding electrode through a plurality of first copper strips to form a grounding network; Install several lightning protection grounding test points according to the drawings, and connect them to the grounding network through a fourth copper tape respectively; An aluminum tape network is laid on the roof of the building, and a plurality of grounding points are arranged around the aluminum tape network, and lightning rods are installed at the grounding points; as well as The aluminum down conductors led out from the concrete column are connected to a ground down conductor point respectively.

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