Lightning protection grounding structure of upper buttress and lower buttress of shock insulation support and construction method

Abstract

The invention discloses a lightning protection grounding structure of an upper buttress and a lower buttress of a shock insulation support and a construction method, the lightning protection grounding structure comprises a lower buttress lightning protection grounding lead, one end of the lower buttress lightning protection grounding lead is welded with a lower buttress column main rib, and the other end of the lower buttress lightning protection grounding lead is welded with a galvanized steel plate arranged on a foundation slab; the galvanized steel sheet is connected with an ohmic ring, and the other end of the ohmic ring is connected with annular galvanized flat steel arranged on the peripheral face of the upper buttress. When the height of a shock insulation layer is lower than a set threshold value, the upper buttress lightning protection grounding lead is directly welded to a shock insulation layer plate face steel bar, a certain length is reserved, the reserved part is connected with the annular galvanized flat steel and the ohmic ring after follow-up construction is completed, and therefore the problem that due to the fact that the height of the shock insulation layer is ultra-low, the lightning protection grounding lead is damaged is well solved. The problem that an upper buttress lightning protection grounding lead is difficult to connect with an upper buttress column main reinforcement due to the fact that an upper buttress template is constructed firstly and the upper buttress column main reinforcement is constructed later is solved, so that effective completion of lightning protection grounding of the upper buttress is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of lightning protection and grounding, and particularly relates to a lightning protection and grounding structure and construction method for the upper pier and lower pier of a seismic isolation bearing. Background Art

[0002] Earthquakes are a type of natural disaster that pose a greater threat to humanity. The occurrence of each earthquake may cause casualties and property losses. How to reduce the impact of earthquakes has always been an eternal topic in social development. With the further in-depth study of earthquakes and the continuous development of building construction technologies, the application of building seismic isolation and vibration reduction technologies in construction has become increasingly widespread. In large buildings, especially in high-intensity earthquake areas, in order to improve the earthquake resistance of buildings, seismic isolation bearings are usually used to separate the building from the foundation, so that the upper structure can generate a certain horizontal displacement during an earthquake, release part of the energy, and thus reduce the impact of the earthquake on the building.

[0003] Due to the use of seismic isolation bearings, the lower pier and the upper pier are separated, resulting in the need to disconnect the grounding wire at the position of the bearing during lightning protection and grounding construction. The conventional construction method generally welds the lightning protection grounding wire led out from the lower pier to the main reinforcement of the upper pier to achieve the connection effect, and then closes the column formwork and proceeds with subsequent construction. However, in large buildings, the column size is usually large and the steel bars are dense. Sometimes, in order to control the building area, the height of the seismic isolation layer is relatively low, and due to the different usage requirements of the upper part of the seismic isolation layer, the floor heights are not the same, and the floor height in some areas is extremely low. Therefore, during the construction of the upper pier, the areas with extremely low floor heights need to first construct the column formwork and then construct the column steel bars. At this time, the lightning protection grounding wire cannot be connected to the main reinforcement of the upper pier. For the areas with relatively higher floor heights, the column steel bars can be constructed first and then the formwork can be closed. However, due to the dense formwork supports on the side of the column, the lightning protection grounding connection wire cannot be formed in one step like the conventional construction method. Therefore, in the case of limited space in the seismic isolation layer and sometimes the need to first construct the column formwork, how to ensure the effective connection of the lightning protection and grounding between the lower pier and the upper pier at the seismic isolation bearing and reduce the construction difficulty is still a construction problem. Summary of the Invention

[0004] The purpose of the present invention is to provide a lightning protection and grounding structure and construction method for the upper pier and lower pier of a seismic isolation bearing in view of the problems existing in the prior art.

[0005] To achieve the above object, the invention is implemented by the following technical solutions: The lightning protection and grounding structure of the upper pier and the lower pier of the seismic isolation bearing, including the lightning protection and grounding lead of the lower pier. One end of the lightning protection and grounding lead of the lower pier is welded to the main reinforcement of the lower pier column, and the other end of the lightning protection and grounding lead of the lower pier is welded to a galvanized steel plate arranged on the foundation floor slab. An ohmic ring is connected to the galvanized steel plate, and the other end of the ohmic ring is connected to a circular galvanized flat steel arranged on the outer peripheral surface of the upper pier. An upper pier lightning protection and grounding lead is welded to the circular galvanized flat steel, and the other end of the upper pier lightning protection and grounding lead is welded to the main reinforcement of the upper pier column inside the upper pier or to the seismic isolation layer slab reinforcement inside the seismic isolation layer slab.

[0006] By adopting the above technical solutions, welding the lightning protection and grounding lead of the lower pier to the main reinforcement of the lower pier column, and welding the lightning protection and grounding lead of the upper pier to the main reinforcement of the upper pier column or the seismic isolation layer slab reinforcement, ensures the continuity of the entire grounding path between the upper pier and the lower pier, and further enables the entire grounding system to form a complete electrical circuit.

[0007] Furthermore, the galvanized steel plate, the lightning protection and grounding lead of the lower pier, the ohmic ring and the lightning protection and grounding lead of the upper pier are a set of connection kits. There are multiple sets of connection kits in total, and all the connection kits are respectively connected to the circular galvanized flat steel from different directions centered on the seismic isolation bearing.

[0008] By adopting the above technical solutions, multi-directional connection can ensure the uniform distribution of the grounding current in all directions and avoid the concentration of the grounding current at a certain position.

[0009] Furthermore, with the central axis of the lower pier as the reference, the lightning protection and grounding lead of the lower pier, the ohmic ring and the lightning protection and grounding lead of the upper pier in multiple connection kits are all distributed around the reference.

[0010] By adopting the above technical solutions, with the central axis of the lower pier as the reference, the lightning protection and grounding lead of the lower pier, the galvanized steel plate, the ohmic ring and the lightning protection and grounding lead of the upper pier in multiple connection kits are all distributed around the reference, ensuring the uniformity of the grounding system distribution and improving the overall performance of the grounding system.

[0011] Furthermore, limiting structures for fastening the ohmic ring are provided on the top surface of the galvanized steel plate and the bottom surface of the circular galvanized flat steel. The limiting structure includes sleeves arranged on the top surface of the galvanized steel plate and the bottom surface of the circular galvanized flat steel. Two groups of oppositely arranged arc-shaped card slots are provided on the peripheral surface of the sleeve. A connecting block is provided in the middle of the arc-shaped card slot. A screw rod extending to the inside and outside of the sleeve is threadedly installed on the connecting block. One end of the screw rod located inside the sleeve is installed with a locking block through a bearing. The end of the ohmic ring is clamped between the two locking blocks. A clamping block extending into the corresponding arc-shaped card slot is also provided on the opposite side of the two locking blocks.

[0012] By adopting the above technical solution, it is used to fix the ohmic ring, which is convenient for later maintenance or replacement.

[0013] Furthermore, two semi-circular end caps are provided at the end of the sleeve, and an opening adapted to the ohmic ring is provided at the center of the two semi-circular end caps.

[0014] By adopting the above technical solution, it is convenient for the ohmic ring to break away from the sleeve.

[0015] Furthermore, two positioning blocks are provided on the ohmic ring, and the positioning blocks are abutted between the semi-circular end cap and the locking block.

[0016] By adopting the above technical solution, the stability after the connection of the ohmic ring is improved.

[0017] Furthermore, a threaded groove is provided inside the connecting block, and the screw rod is threadedly connected to the connecting block through the threaded groove.

[0018] This application also provides a construction method for the lightning protection and grounding structure of the upper pier and the lower pier of the seismic isolation bearing, including the following steps: Weld multiple lightning protection and grounding leads of the lower pier to the main reinforcement bars of the lower pier columns in different directions; Embed multiple galvanized steel plates in the foundation floor slab, and weld the other ends of the lightning protection and grounding leads of the lower pier to the galvanized steel plates on the same side; When the height of the seismic isolation layer is higher than the set threshold, weld the lightning protection and grounding leads of the upper pier to the main reinforcement bars of the upper pier columns in different directions, and reserve a certain length so that the lightning protection and grounding leads of the upper pier can extend outside the to-be-formed upper pier; when the height of the seismic isolation layer is lower than the set threshold, weld the lightning protection and grounding leads of the upper pier to the steel bars on the surface of the seismic isolation layer in different directions, and reserve a certain length so that the lightning protection and grounding leads of the upper pier can extend outside the formed upper pier; After the construction of the upper pier is completed, weld a ring-shaped galvanized flat steel on the outer peripheral surface of the upper pier, and weld the other ends of multiple lightning protection and grounding leads of the upper pier to the ring-shaped galvanized flat steel; Weld ohmic rings on multiple galvanized steel plates, and connect the other ends of the ohmic rings to the ring-shaped galvanized flat steel.

[0019] By adopting the above technical solution, different construction methods are selected according to the height of the seismic isolation layer. When the height of the seismic isolation layer is higher than the set threshold, the lightning protection and grounding leads of the upper pier are welded to the main reinforcement bars of the upper pier columns; when the height of the seismic isolation layer is lower than the set threshold, the lightning protection and grounding leads of the upper pier are welded to the steel bars on the surface of the seismic isolation layer. This flexible construction method can adapt to different construction conditions, thus ensuring the effective completion of the lightning protection and grounding of the upper pier.

[0020] Furthermore, the set threshold of the height of the seismic isolation layer is 3m.

[0021] Furthermore, the different directions include the circumferential direction with the central axis of the pier as the reference.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. When the height of the isolation layer is lower than the set threshold, the lightning protection grounding lead of the upper pier is directly welded to the steel bars on the surface of the isolation layer board, and a certain length is reserved. After the subsequent construction is completed, the reserved part is connected to the annular galvanized flat steel and the ohmic ring. In this way, the problem that it is difficult to connect the lightning protection grounding lead of the upper pier to the main reinforcement of the upper pier column caused by the ultra-low height of the isolation layer, the prior construction of the upper pier formwork, and the subsequent construction of the main reinforcement of the upper pier column is well solved, thus ensuring the effective completion of the lightning protection grounding of the upper pier.

[0023] 2. By adopting the method of reserving a certain length and connecting it to the galvanized steel plate or the annular galvanized flat steel, and then making a secondary connection through the ohmic ring in the later stage, the problem that the lightning protection grounding lead cannot be formed at one time due to the limited space of the isolation layer and the construction sequence of the column formwork is successfully solved. Whether the height of the isolation layer is relatively high or ultra-low, it can ensure the smooth connection of the lightning protection grounding lead of the upper pier and the lightning protection grounding lead of the lower pier, thus avoiding the problem of difficult construction of the grounding wire due to the construction sequence or space limitation.

[0024] 3. By embedding galvanized steel plates in the foundation slab and setting annular galvanized flat steel on the outer peripheral surface of the upper pier, a medium is provided for the connection of the lightning protection grounding lead of the lower pier and the lightning protection grounding lead of the upper pier in the later stage, making the construction more convenient and effectively ensuring the construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of lightning protection grounding connection when the height of the isolation layer is higher than the set threshold in Embodiment 1 of the present invention; Figure 2 It is a schematic diagram of lightning protection grounding connection when the height of the isolation layer is lower than the set threshold in Embodiment 1 of the present invention; Figure 3 It is a schematic diagram of the connection process of the present invention; Figure 4 It is a schematic diagram of lightning protection grounding connection when the height of the isolation layer is higher than the set threshold in Embodiment 2 of the present invention; Figure 5 It is a schematic diagram of the connection between the lightning protection grounding lead of the lower pier and the galvanized steel plate in Embodiment 2 of the present invention; Figure 6 It is a schematic diagram of the connection between the lightning protection grounding lead of the upper pier and the main reinforcement of the upper pier column in Embodiment 2 of the present invention; Figure 7 It is a schematic diagram of lightning protection grounding connection when the height of the isolation layer is lower than the set threshold in Embodiment 2 of the present invention; Figure 8Schematic diagram of the connection between the lightning protection grounding lead of the upper pier and the steel bars on the surface of the isolation layer in the second embodiment of the present invention; Figure 9 Schematic diagram of the limit structure of the present invention; Figure 10 Schematic diagram of the composition of the limit structure of the present invention; Figure 11 Cross-sectional view of the sleeve of the present invention.

[0026] In the figure: 1, lower pier; 2, main reinforcement bars of the lower pier column; 3, isolation bearing; 4, upper pier; 5, main reinforcement bars of the upper pier column; 6, foundation slab; 7, isolation layer slab; 8, steel bars on the surface of the isolation layer; 9, limit structure; 901, sleeve; 902, screw; 903, arc-shaped card slot; 904, locking block; 905, connecting block; 906, clamping block; 10, galvanized steel plate; 11, lightning protection grounding lead of the lower pier; 12, ohm ring; 13, annular galvanized flat steel; 14, lightning protection grounding lead of the upper pier; 15, semi-circular end cover; 16, positioning block. Detailed implementation manners

[0027] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "middle", "upper", "lower", "left", "right", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. Embodiment

[0029] As Figure 1 and Figure 2 shown, a lightning protection grounding structure for the upper pier and the lower pier of an isolation bearing includes a lightning protection grounding lead 11 of the lower pier. One end of the lightning protection grounding lead 11 of the lower pier is welded to the main reinforcement bars 2 of the lower pier column, and the other end of the lightning protection grounding lead 11 of the lower pier is welded to a galvanized steel plate 10 arranged on the foundation slab 6. An ohm ring 12 is connected to the galvanized steel plate 10, and the other end of the ohm ring 12 is connected to an annular galvanized flat steel 13 arranged on the outer peripheral surface of the upper pier 4. An upper pier lightning protection grounding lead 14 is welded to the annular galvanized flat steel 13, and the other end of the upper pier lightning protection grounding lead 14 is welded to the main reinforcement bars 5 inside the upper pier 4 or welded to the steel bars 8 on the surface of the isolation layer inside the isolation layer slab 7.

[0030] Among them, the ohmic loop 12 is made of galvanized flat steel or galvanized round steel and is used for the electrical connection between the lightning protection grounding lead 14 of the upper pier and the lightning protection grounding lead 11 of the lower pier. At the same time, due to the design of the seismic isolation bearing 3, the upper pier 4 is allowed to generate horizontal displacement during an earthquake to release seismic energy and reduce damage to the building. The ohmic loop 12 has a certain flexibility, and its length can also adapt to this horizontal displacement to ensure that the grounding wire will not lose its grounding function due to stretching or breaking during an earthquake.

[0031] In addition, there are multiple galvanized steel plates 10 buried on the foundation slab 6, and their positions are distributed around the lower pier 1. The galvanized steel plates 10 are at the same elevation as the foundation slab 6. The annular galvanized flat steel 13 is installed on the outer peripheral surface of the upper pier 4 by welding after the construction of the upper pier 4 is completed. By embedding the galvanized steel plates 10 in the foundation slab 6 and setting the annular galvanized flat steel 13 on the outer peripheral surface of the upper pier 4, a medium is provided for the connection of the lightning protection grounding lead 11 of the lower pier and the lightning protection grounding lead 14 of the upper pier in the later stage, making the construction more convenient and the construction quality can be effectively guaranteed.

[0032] In this embodiment, the ohmic loop 12 is connected to both the galvanized steel plate 10 and the annular galvanized flat steel 13 by welding.

[0033] In this embodiment, the galvanized steel plate 10, the lightning protection grounding lead 11 of the lower pier, the ohmic loop 12, and the lightning protection grounding lead 14 of the upper pier form a set of connection kits. There are multiple sets of connection kits in total. All the connection kits are respectively connected to the annular galvanized flat steel 13 from different directions centered on the seismic isolation bearing 3. Based on the central axis of the lower pier 1, the lightning protection grounding lead 11 of the lower pier, the ohmic loop 12, and the lightning protection grounding lead 14 in multiple connection kits are all distributed around the reference.

[0034] Among them, by forming multiple sets of connection kits with the galvanized steel plate 10, the lightning protection grounding lead 11 of the lower pier, the ohmic loop 12, and the lightning protection grounding lead 14 and connecting them to the annular galvanized flat steel 13 from different directions, the integrity of the grounding system can be ensured. This multi-directional connection method enables the grounding system to form effective electrical connections in all directions, thereby improving the reliability and stability of the entire grounding system.

[0035] It should be noted that the lightning protection grounding lead 11 in different directions needs to be welded to the main bars 2 of the lower pier column in different directions, and the lightning protection grounding lead 14 of the upper pier needs to be welded to the main bars 5 of the upper pier column in different directions or the slab surface bars 8 of the seismic isolation layer in different directions.

[0036] Please refer to Figure 3 , this embodiment also provides a construction method for the lightning protection grounding structure of the upper and lower piers of the seismic isolation bearing, including the following steps: Step 1: During the construction of the lower pier 1, after the main bars 2 of the lower pier column are tied, multiple lower pier lightning protection grounding leads 11 are welded to the main bars 2 of the lower pier column in different directions, and at the same time, they extend a certain length outside the to-be-formed lower pier 1; Among them, different directions include the circumferential direction with the central axis of the lower pier 1 as the reference.

[0037] Step 2: A plurality of galvanized steel plates 10 are embedded in the foundation slab 6 along the circumferential direction of the to-be-formed lower pier 1, and the extended parts of the lifted lower pier lightning protection grounding leads 11 are welded to the galvanized steel plates 10 on the same side; Step 3: As Figure 1 shown, when the height of the isolation layer is higher than the set threshold: During the construction of the upper pier 4, after the main bars 5 of the upper pier column are tied, upper pier lightning protection grounding leads 14 are welded to the main bars 5 of the upper pier column in different directions, and a certain length is reserved so that the upper pier lightning protection grounding leads 14 can extend outside the to-be-formed upper pier 4; As Figure 2 shown, when the height of the isolation layer is lower than the set threshold: During the construction of the upper pier 4, since the height of the isolation layer is relatively low at this time, the column formwork construction is carried out first and then the main bars 5 of the upper pier column are constructed. Therefore, when the isolation layer slab 7 is constructed after the upper pier 4 is constructed, upper pier lightning protection grounding leads 14 are welded to the slab surface steel bars 8 of the isolation layer in different directions, and a certain length is reserved to extend it outside the formed upper pier 4.

[0038] It should be noted that: The set threshold of the height of the isolation layer is defined as a reference value, usually about 3 meters. This threshold is proposed based on the comprehensive consideration of the construction environment and conditions of the isolation bearings, aiming to provide a reference standard for construction personnel so that they can choose a suitable construction method according to the actual situation. However, in actual projects, this threshold may be adjusted according to specific circumstances. Specifically, when the height of the isolation layer is lower than 3 meters, the construction space is relatively narrow, and usually, the column formwork construction is carried out first, and then the column steel bars are installed. This construction sequence limits the direct connection between the upper pier lightning protection grounding leads 14 and the main bars 5 of the upper pier column. Therefore, a construction method of welding the upper pier lightning protection grounding leads 14 to the slab surface steel bars 8 of the isolation layer needs to be adopted. When the height of the isolation layer is higher than 3 meters, the construction space is relatively large, allowing the column steel bars to be constructed first and then the column formwork to be closed. This construction sequence facilitates the direct connection between the upper pier lightning protection grounding leads 14 and the main bars 5 of the upper pier column. Therefore, a direct connection construction method can be adopted.

[0039] Step 4: After the upper pier 4 is constructed, a ring-shaped galvanized flat steel 13 is welded on the outer peripheral surface of the upper pier 4, and the pre-extended parts of the multiple upper pier lightning protection grounding leads 14 are welded to the ring-shaped galvanized flat steel 13; Step 5: Weld multiple ohmic rings 12 to the corresponding galvanized steel plates 10 according to the distribution of the galvanized steel plates 10, and weld the other end of the ohmic ring 12 to the annular galvanized flat steel 13 in the same direction, thereby completing the grounding and lightning protection work of the entire upper pier 4 and the lower pier 1. Example

[0040] The difference from the first embodiment is that the ohmic ring 12 is connected to the galvanized steel plate 10 and the annular galvanized flat steel 13 by means of a clamping connection of the limiting structure 9. Specifically: like Figure 4 and Figure 7 As shown, in this embodiment, the top surface of the galvanized steel plate 10 and the bottom surface of the annular galvanized flat steel 13 are provided with a limiting structure 9 for fastening the ohmic ring 12. The limiting structure 9 includes a sleeve 901 arranged on the top surface of the galvanized steel plate 10 and the bottom surface of the annular galvanized flat steel 13. The circumferential surface of the sleeve 901 is provided with two groups of arc-shaped grooves 903 arranged opposite to each other. A connecting block 905 is provided in the middle of the arc-shaped groove 903. A screw 902 extending to the inner and outer sides of the sleeve 901 is threadedly installed on the connecting block 905. A locking block 904 is installed at one end of the screw 902 located inside the sleeve 901 through a bearing. The end of the ohmic ring 12 is clamped between the two locking blocks 904. The opposite side of the two locking blocks 904 is also provided with a block 906 extending to the corresponding arc-shaped groove 903. A threaded groove is provided inside the connecting block 905, and the screw 902 is threadedly connected to the connecting block 905 through the threaded groove.

[0041] like Figure 10 As shown, a mounting block is installed on the outer circumference of the sleeve 901, which can be fixed to the galvanized steel plate 10 and the annular galvanized flat steel 13 by bolts, thereby completing the installation of the limiting structure 9.

[0042] See also Figure 11 In this embodiment, two semicircular end covers 15 are further provided at the end of the sleeve 901. The centers of the two semicircular end covers 15 are provided with openings adapted to the ohmic ring 12. Two positioning blocks 16 are also provided on the ohmic ring 12. The positioning blocks 16 abut between the semicircular end covers 15 and the locking block 904.

[0043] Among them, the two semicircular end covers 15 are fixed to the sleeve 901 by bolts. When the ohmic ring 12 needs to be maintained or replaced later, the ohmic ring 12 can be pulled out by disassembling the semicircular end covers 15, thereby improving the convenience of maintenance of the ohmic ring 12. The positioning block 16 can be limited by the semicircular end covers 15 and the locking block 904, making it difficult to separate from the sleeve 901.

[0044] In addition, after the sleeve 901 is installed, rotating the screw rod 902 can cause the locking block 904 to move horizontally. When the two locking blocks 904 move towards each other, the side of the Ohm ring 12 near the end will be clamped and locked by the two locking blocks 904, thereby fixing the end of the Ohm ring 12.

[0045] It should be noted that the shape of the locking block 904 is adapted to the outer peripheral surface of the Ohm ring 12, so that it can better fit the shape of the Ohm ring 12 and improve the fastening effect.

[0046] In addition, the number of galvanized steel plates 10 is the same as that of the lower pier lightning protection grounding leads 11 and the Ohm rings 12. Therefore, a limiting structure 9 is provided on each galvanized steel plate 10, and the annular galvanized flat steel 13 needs to be connected to the other ends of multiple Ohm rings 12. Therefore, multiple limiting structures 9 are provided on the annular galvanized flat steel 13.

[0047] As Figures 4 to 8 shown, this embodiment also provides a construction method for the lightning protection grounding structure of the upper and lower piers of the second isolation bearing. The difference from the construction method in Embodiment 1 lies in Step 5. Specifically: Fix the sleeve 901 to the galvanized steel plate 10 and the annular galvanized flat steel 13 through bolts. Insert the two ends of the Ohm ring 12 into the corresponding sleeve 901 from the inside and make contact connections with the corresponding galvanized steel plate 10 and the annular galvanized flat steel 13. Then, fix the two semi-circular end caps 15 to the ends of the sleeve 901 through bolts, so that the positioning block 16 abuts between the semi-circular end cap 15 and the locking block 904. Subsequently, rotating the screw rod 902 can cause the locking block 904 to move towards the Ohm ring 12, and clamp the end of the Ohm ring 12 through the two locking blocks 904, thereby completing the fixation of the Ohm ring 12.

[0048] Among them, docking grooves are provided on both the galvanized steel plate 10 and the annular galvanized flat steel 13. The ends of the Ohm ring 12 can extend into the inside of the docking grooves, increasing the contact area between the Ohm ring 12 and the galvanized steel plate 10 and the annular galvanized flat steel 13. Furthermore, the stability of the grounding path between the Ohm ring 12 and the galvanized steel plate 10 and the annular galvanized flat steel 13 is improved. In addition, in combination with the limiting effect of the locking block 904 and the semi-circular end cap 15 on the positioning block 16, and the clamping and fixation of the locking block 904, the stability of the connection between the Ohm ring 12 and the galvanized steel plate 10 and the annular galvanized flat steel 13 is ensured. Since the Ohm ring 12 is exposed, the convenience of later maintenance or replacement of the Ohm ring 12 can be greatly improved by adopting this method.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Lightning protection and grounding structure for the upper and lower piers of a seismic isolation bearing, characterized in that, It includes a lightning protection grounding lead (11) for the lower pier. One end of the lightning protection grounding lead (11) for the lower pier is welded to the main reinforcement bars (2) of the lower pier column. The other end of the lightning protection grounding lead (11) for the lower pier is welded to a galvanized steel plate (10) arranged on the foundation slab (6). An ohmic ring (12) is connected to the galvanized steel plate (10). The other end of the ohmic ring (12) is connected to an annular galvanized flat steel (13) arranged on the outer peripheral surface of the upper pier (4). An upper pier lightning protection grounding lead (14) is welded to the annular galvanized flat steel (13). The other end of the upper pier lightning protection grounding lead (14) is welded to the main reinforcement bars (5) inside the upper pier (4) or to the diaphragm slab surface reinforcement bars (8) inside the isolation layer slab (7).

2. The lightning protection and grounding structure of the upper pier and lower pier of the seismic isolation bearing according to claim 1, characterized in that: The galvanized steel plate (10), the lightning protection grounding lead (11) for the lower pier, the ohmic ring (12), and the upper pier lightning protection grounding lead (14) form a set of connection kits. Multiple sets of connection kits are provided. All the connection kits are respectively connected to the annular galvanized flat steel (13) from different directions centered on the isolation bearing (3).

3. The lightning protection and grounding structure of the upper pier and the lower pier of the seismic isolation bearing according to claim 2, wherein: Based on the central axis of the lower pier (1), the lightning protection grounding leads (11) for the lower pier, the galvanized steel plates (10), the ohmic rings (12), and the upper pier lightning protection grounding leads (14) in multiple connection kits are all distributed around the benchmark.

4. The lightning protection and grounding structure of the upper pier and the lower pier of the seismic isolation bearing according to claim 1, characterized in that: Limit structures (9) for fastening the ohmic ring (12) are provided on the top surface of the galvanized steel plate (10) and the bottom surface of the annular galvanized flat steel (13). The limit structure (9) includes sleeves (901) provided on the top surface of the galvanized steel plate (10) and the bottom surface of the annular galvanized flat steel (13). Two groups of oppositely arranged arc-shaped card slots (903) are formed on the peripheral surface of the sleeve (901). A connecting block (905) is arranged in the middle of the arc-shaped card slot (903). A screw rod (902) extending towards the inner and outer sides of the sleeve (901) is threadedly installed on the connecting block (905). One end of the screw rod (902) located inside the sleeve (901) is installed with a locking block (904) through a bearing. The end of the ohmic ring (12) is clamped between the two locking blocks (904). On the opposite sides of the two locking blocks (904), there are also card blocks (906) extending into the corresponding arc-shaped card slots (903).

5. The lightning protection and grounding structure of the upper and lower piers of the seismic isolation bearing according to claim 4, characterized in that: Two semi-circular end caps (15) are also provided at the ends of the sleeve (901). An opening adapted to the ohmic ring (12) is provided at the centers of the two semi-circular end caps (15).

6. The lightning protection and grounding structure of the upper and lower piers of the seismic isolation bearing according to claim 5, characterized in that: Two positioning blocks (16) are also provided on the ohmic ring (12). The positioning blocks (16) are abutted between the semi-circular end caps (15) and the locking blocks (904).

7. The lightning protection and grounding structure of the upper pier and lower pier of the seismic isolation bearing according to claim 4, characterized in that: A threaded groove is provided inside the connecting block (905). The screw rod (902) is threadedly connected to the connecting block (905) through the threaded groove.

8. The construction method of the lightning protection and grounding structure for the upper pier and lower pier of the seismic isolation bearing according to any one of claims 1-7, characterized in that: It includes the following steps: Weld multiple lightning protection grounding leads (11) for the lower pier to the main reinforcement bars (2) of the lower pier column in different directions; Embed multiple galvanized steel plates (10) in the foundation slab (6), and weld the other end of the lower pier lightning protection grounding lead (11) to the galvanized steel plate (10) on the same side; When the height of the isolation layer is higher than the set threshold, weld the upper pier lightning protection grounding leads (14) on the main bars (5) of the upper piers in different directions, and reserve a certain length so that the upper pier lightning protection grounding leads (14) can extend outside the to-be-formed upper pier (4); when the height of the isolation layer is lower than the set threshold, weld the upper pier lightning protection grounding leads (14) on the slab reinforcement bars (8) of the isolation layer in different directions, and reserve a certain length so that the upper pier lightning protection grounding leads (14) can extend outside the formed upper pier (4); After the construction of the upper pier (4) is completed, weld the annular galvanized flat steel (13) on the outer peripheral surface of the upper pier (4), and connect the other ends of multiple upper pier lightning protection grounding leads (14) to the annular galvanized flat steel (13); Weld the ohmic rings (12) on multiple galvanized steel plates (10), and connect the other ends of the ohmic rings (12) to the annular galvanized flat steel (13).

9. The construction method of the lightning protection and grounding structure for the upper and lower piers of the seismic isolation bearing according to claim 6, characterized in that: The set threshold of the height of the isolation layer is 3m.

10. The construction method of the lightning protection and grounding structure for the upper and lower piers of the seismic isolation bearing according to claim 6, characterized in that: The different directions include the circumferential direction with the central axis of the lower pier (1) as the reference.

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