Fabricated seismic mitigation and isolation support with novel anchoring structure

Abstract

The utility model relates to the technical field of bridge structures or buildings, in particular to an assembly type seismic mitigation and isolation support with a novel anchoring structure, a lower seat plate, a middle seat plate and an upper seat plate are sequentially arranged from bottom to top, the lower seat plate is of an assembly type structure, and the lower seat plate comprises a lower seat plate base plate, a lower seat plate inserting plate and an anchoring part. The lower seat plate base plate and the lower seat plate inserting plate are connected into a whole, the anchoring part penetrates through the lower seat plate base plate to be connected with the abutment cushion stone, and the anchoring part completely enters the lower seat plate base plate to be used for reducing the assembling difficulty when the assembly type shock absorption and isolation support is installed. According to the utility model, the anchoring part is improved, so that the height of the anchoring part can be reduced while the connecting length is ensured, and the installation is convenient; meanwhile, the anchoring part is optimally designed, the self-locking effect of the anchoring part is improved, and the reliability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge structures or buildings, in particular to an assembled shock-absorbing and isolating support with a novel anchoring structure. Background Art

[0002] With the development of existing survey technology and the deepening of understanding after recent earthquake investigations, the seismic intensity levels in the areas where some existing railway bridges are located will be reclassified from low intensity to high intensity. As a result, the seismic performance of rigid-resistance bridges originally designed for low seismic intensity needs to be further improved. The rigid-resistance design needs to be modified to a seismic isolation design, that is, the existing seismic isolation bearings are used to replace the spherical bearings to meet the adjusted bridge defense level requirements in high-intensity earthquake zones.

[0003] The anchor bolt interface connecting the seismic isolation bearings to the beams of existing railway bridges is relatively easy to design; however, the height of the seismic isolation bearings is generally higher than that of ordinary spherical bearings, and the lower base plate is also larger. Currently, prefabricated structures have been proposed that can simultaneously meet the requirements for installation height and the anchor bolt interface at the bearing pad.

[0004] Publication No. CN116607405A discloses an assembled seismic isolation bearing and its installation method. The lower seat plate assembly includes a main body and an insert plate. The main body includes a first spherical segment surface, and the insert plate includes a second spherical segment surface. The first and second spherical segments form a continuous concave spherical structure. The main body is provided with an anchor hole, into which an anchor bolt is inserted. The insert plate covers the lower anchor bolt, and a groove is provided at the lower end of the insert plate, into which the lower anchor bolt is located. The anchor bolt head of this invention protrudes from the main body, and a groove is provided at the bottom of the insert plate to accommodate the anchor bolt head.

[0005] However, the anchor bolts used in this structure are integral hexagonal head bolts. When leaving the factory, the anchor bolts need to be inserted into the lower base plate so that the bottom of the anchor bolts is flush with the bottom of the lower base plate. At this time, the top of the anchor bolt head may be close to or even touch the upper base plate, resulting in insufficient installation space for the anchor bolts during on-site assembly. The seismic isolation bearing is difficult to assemble and has low reliability. Summary of the Invention

[0006] In view of this, the present invention aims to propose an assembled seismic isolation bearing with a new anchoring structure to solve the problems of insufficient installation space for anchor bolts during on-site assembly of existing assembled seismic isolation bearings, which makes assembly of the seismic isolation bearings difficult and has low reliability.

[0007] The existing technology is difficult to assemble, and there are problems such as difficulty in tightening the anchor bolts and insufficient tightening resulting in loose fixation.

[0008] Existing unidirectional, movable, three-friction-pair assembled seismic isolation bearings primarily consist of a top base plate, a flat friction pair, an upper base plate, an upper spherical friction pair, a middle base plate, a lower spherical friction pair, a lower base plate assembly, a seal, and anchor bolts. Before the bearing leaves the factory, the anchor bolts must be pre-installed on the lower base plate, ensuring that their bottoms are flush with the bottom surface of the lower base. This places the anchor bolts very close to the upper base plate during on-site construction, potentially resulting in insufficient space for the anchor bolts during on-site assembly, making assembly more difficult.

[0009] The utility model is applicable when using a seismic isolation bearing to replace an old damaged ordinary spherical bearing. Since the ordinary spherical bearing is different from the seismic isolation bearing in terms of external dimensions and height, the position of the bolt hole of the ordinary spherical bearing and the height between the bridge and the pier are different from those of the normal seismic isolation bearing. Therefore, the design position of the anchor of the seismic isolation bearing needs to be adaptively improved, and interference between the anchor and the various parts of the seismic isolation bearing needs to be avoided. Therefore, it is necessary to improve other parts while changing the anchor of the seismic isolation bearing.

[0010] The anchoring structure of the utility model improves the anchoring piece so that the height of the anchoring piece can be reduced while ensuring the connection length, and further optimizes the design of the anchoring piece, thereby improving the self-locking effect of the anchoring piece and improving the reliability of the device.

[0011] The technical solution of the present utility model is achieved as follows: an assembled seismic isolation bearing with a new anchoring structure includes a lower seat plate, a middle seat plate, and an upper seat plate arranged in sequence from bottom to top, the lower seat plate is an assembled structure, the lower seat plate includes a lower seat plate base plate, a lower seat plate plug plate and an anchor, the lower seat plate base plate and the lower seat plate plug plate are connected into one piece, the anchor passes through the lower seat plate base plate and is connected to the pier pad stone, and all the anchors enter the lower seat plate base plate, which is used to reduce the assembly difficulty during the installation of the assembled seismic isolation bearing.

[0012] Furthermore, the lower seat plate base plate includes a first spherical segment surface and at least two first threaded holes, the first spherical segment surface is arranged on the upper part of the lower seat plate base plate, the first threaded holes are evenly distributed along the circumference of the first spherical segment surface, and the first threaded holes are used for the anchor to pass through the lower seat plate base plate to connect to the pier pad stone.

[0013] Furthermore, the anchor is a stud, and a first groove is provided at the top center of one end of the anchor for facilitating tightening the anchor.

[0014] Furthermore, a groove is provided at the bottom of the anchoring piece, and an elastic body is provided in the groove to prevent the anchoring piece from loosening.

[0015] Furthermore, the anchor is a stepped stud, the upper portion of which has a larger diameter and the lower portion has a diameter equal to the normal anchor bolt diameter used for supports of the same tonnage.

[0016] Furthermore, the cross section of the first threaded hole is stepped.

[0017] Furthermore, when the vertical projection of the anchoring piece overlaps with the first spherical segment surface, a connecting block is provided on the top of the anchoring piece, and the top of the connecting block and the first spherical segment surface form a continuous spherical segment surface.

[0018] Furthermore, the lower seat plate insert includes a second spherical segment surface and a second threaded hole, the second spherical segment surface is used to form a continuous concave spherical structure with the first spherical segment surface, and the second threaded hole is used to connect the lower seat plate base plate.

[0019] Furthermore, the spherical surfaces of the first spherical segment surface and the second spherical segment surface are both coated or plated.

[0020] Furthermore, the lower seat plate insert includes a second spherical segment surface and a second threaded hole, the cross section of the lower seat plate insert is a quarter of a circle, and the lower seat plate insert is connected to the lower seat plate base plate via screws.

[0021] Compared with the existing technology, the assembled seismic isolation bearing with a new anchoring structure of the utility model has the following advantages:

[0022] 1. The utility model improves the anchor so that the height of the anchor can be reduced while ensuring the connection length, which is convenient for installation; at the same time, the anchor is optimized to improve the self-locking effect of the anchor and the reliability of the device.

[0023] 2. The utility model provides a connector with a spherical segment surface at the top of the anchor piece. The spherical segment surface of the connector forms a continuous spherical segment surface with the first spherical segment surface, thereby avoiding damage to the spherical segment surface due to local stress concentration, extending the service life of the parts, and improving the reliability of the support.

[0024] 3. The utility model sets a new anchoring structure for the lower base plate of the seismic isolation bearing. By improving the specific structure of each part, the assembly height requirement during the installation process is lowered, which facilitates the smooth assembly and improves the replacement efficiency of the old spherical bearing.

[0025] 4. The utility model adopts a new anchoring structure for the seismic isolation bearing. The new anchoring structure is placed in the anchor bolt mouth of the lower seat plate in advance before leaving the factory. Compared with the usual design, the height of the seismic isolation bearing can be reduced to the height of the original spherical bearing, avoiding the problem of increased bearing height caused by installing bolts after the bearing is assembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 This is a structural diagram of the seismic isolation support in the utility model (limiting direction);

[0028] Figure 2 This is a structural diagram of the seismic isolation support in the utility model (direction of movement);

[0029] Figure 3 This is a schematic diagram of the cross-section AA structure of the seismic isolation bearing in the present invention;

[0030] Figure 4 This is a schematic diagram of the cross-section BB structure of the seismic isolation bearing in the present invention;

[0031] Figure 5 This is a schematic diagram of the top view of the lower seat plate of the seismic isolation support in the present invention;

[0032] Figure 6 This is a schematic diagram of the main structure of the lower seat plate insert of the seismic isolation support in the utility model;

[0033] Figure 7 This is a schematic diagram of the top view of the lower seat plate insert of the seismic isolation support in the utility model;

[0034] Figure 8 This is a bottom view of the structure of the lower seat plate insert of the seismic isolation support in the present invention;

[0035] Figure 9 This is a schematic diagram of the main structure of the anchor piece of the seismic isolation support in the present utility model;

[0036] Figure 10 This is a schematic diagram of the top view of the anchor member of the seismic isolation support in the present invention;

[0037] Figure 11 This is a schematic diagram of the assembly structure of the new anchor bolt structure and the lower seat plate insert of the seismic isolation support in the utility model;

[0038] Figure 12 DD is a schematic diagram of the assembly cross-section of the new anchor bolt structure and the lower seat plate insert of Example 1 of the present utility model;

[0039] Figure 13 This is a schematic diagram of the elastic body structure at the bottom of the anchor in the utility model;

[0040] Figure 14 This is a schematic diagram of the top connecting block structure of the anchor in the utility model.

[0041] Description of reference numerals:

[0042] 1. Top seat plate; 2. Plane friction pair; 3. Upper seat plate; 4. Upper spherical friction pair; 5. Middle seat plate; 6. Lower spherical friction pair; 7. Lower seat plate; 701. Lower seat plate base plate; 7011. First threaded hole; 7012. First spherical segment surface; 702. Lower seat plate insert; 7021. Second spherical segment surface; 7022. Second threaded hole; 8. Seal; 9. Guide friction pair; 10. Limit plate; 12. Anchor; 1201. First groove; 13. Projectile; 14. Connecting block. DETAILED DESCRIPTION

[0043] In order to make the technical means, objectives and effects of the present invention easier to understand, embodiments of the present invention are described in detail below with reference to specific drawings.

[0044] It should be noted that all directional and positional terms in this utility model, such as "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," "center," etc., are used only to explain the relative positional relationships and connections between components in a specific state. They are intended solely to facilitate the description of this utility model and do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., used in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated.

[0045] In the description of this utility model, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections; they can refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0046] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0047] The utility model discloses an assembled seismic isolation bearing with a novel anchoring structure, comprising a lower seat plate 7, a middle seat plate 5, and an upper seat plate 3 arranged in sequence from bottom to top. The lower seat plate 7 is an assembled structure, and the lower seat plate 7 comprises a lower seat plate base plate 701, a lower seat plate plug plate 702 and an anchor 12. The lower seat plate base plate 701 and the lower seat plate plug plate 702 are connected into one body, and the anchor 12 passes through the lower seat plate base plate 701 and is connected to the pier pad stone. The anchor 12 completely enters the lower seat plate base plate 701, which is used to reduce the assembly difficulty during the installation of the assembled seismic isolation bearing.

[0048] This arrangement allows the anchor 12 to fully enter the lower seat plate base plate 701, avoiding the abutment between the head of the ground angle bolt and the outer surface of the lower seat plate base plate 701 in the prior art, helping to reduce the length of the anchor 12, reducing the installation space requirement of the seismic isolation bearing, and reducing the difficulty of assembly and installation when the assembled seismic isolation bearing replaces the existing damaged spherical bearing; at the same time, it ensures the connection length between the anchor 12 and the lower seat plate base plate 701, avoiding accelerated wear of the lower seat plate base plate 701 due to the reduction in connection length, and extending the service life of the bearing.

[0049] The lower seat plate 7 is an assembled structure. Before the bearing leaves the factory, the anchor 12 needs to be inserted into the lower seat plate base plate 701; during on-site installation, the bearing and the beam body are installed in the same way as the original ordinary spherical bearing; when installed with the pier pad stone, the anchor 12 should be tightened first, and then the lower seat plate plug 702 should be covered and closed with the anchor 12, and then connected and fixed to the lower seat plate base plate 701, which can quickly realize the overall installation of the bearing and avoid the problem of insufficient installation space for the anchor bolts during on-site assembly, which makes assembly more difficult.

[0050] Specifically, the lower seat plate base plate 701 includes a first spherical segment surface 7012 and at least two first threaded holes 7011. The first spherical segment surface 7012 is arranged on the upper part of the lower seat plate base plate 701. The first threaded holes 7011 are evenly distributed circumferentially along the first spherical segment surface 7012. The first threaded holes 7011 are used for the anchor 12 to pass through the lower seat plate base plate 701 to connect to the pier pad stone.

[0051] The first threaded holes 7011 are evenly distributed on the first spherical surface 7012 to ensure that the anchor 12 is evenly stressed, so that the lower seat base plate 701 and the pier pad are firmly fixed together, thereby improving the stability and safety of the overall structure.

[0052] Preferably, four first threaded holes 7011 are provided.

[0053] The arrangement of four first threaded holes 7011 can ensure that the anchor 12 limits the displacement of the lower seat base plate 701 from multiple directions, reduces the force on a single anchor 12 during use of the seismic isolation support, further improves the overall stability and reliability of the seismic isolation support, and keeps the production cost at a low level.

[0054] Specifically, the anchor 12 is a stud, and a first groove 1201 is provided at the center of the top of one end of the anchor 12 for facilitating tightening the anchor 12 .

[0055] The anchor 12 is set as a stud, which avoids the contact between the head of the ground angle bolt and the surface of the lower seat base plate 701 in the prior art, helps to reduce the length of the anchor 12, reduce the installation space requirement of the seismic isolation bearing, and reduce the assembly and installation difficulty when the assembled seismic isolation bearing replaces the existing damaged spherical bearing.

[0056] Preferably, the cross section of the first groove 1201 is hexagonal.

[0057] Preferably, a groove is provided at the bottom of the anchor 12, and an elastic body 13 is provided in the groove to prevent the anchor 12 from loosening.

[0058] The anchor 12 is arranged such that the elastic body is slightly convex on the bottom surface when not installed. When installed and tightened, the elastic body 13 is compressed by pressure, which does not affect the connection length between the anchor 12 and the lower seat base plate 701 and the pier pad stone, and can better achieve the relaxation effect.

[0059] Specifically, the cross section of the first threaded hole 7011 is stepped.

[0060] The cross section of the first threaded hole 7011 is set to be stepped, which ensures the connection length between the anchor 12 and the lower seat plate base plate 701, reduces the wear of the lower seat plate base plate 701, extends the service life of the support, and facilitates the installation of the anchor 12.

[0061] Specifically, the anchor 12 is a stepped threaded stud with a larger upper diameter and a lower diameter that is the diameter of a normal anchor bolt used for a support of the same tonnage.

[0062] The anchor 12 is configured as a stepped threaded stud, so that the anchor 12 cooperates with the first threaded hole 7011 , thereby preventing the anchor 12 from being over-tightened and ensuring the connection length between the anchor 12 and the first threaded hole 7011 .

[0063] Specifically, a connecting block 14 is provided on the top of the anchor 12 , and the top of the connecting block 14 and the first spherical segment surface 7012 form a continuous spherical segment surface.

[0064] This arrangement ensures the continuity of the spherical segment surface when the anchor 12 overlaps with the spherical segment surface, avoids damage to the spherical segment surface due to local stress concentration, and extends the service life of the component.

[0065] At this time, the lower seat plate insert 702 does not need to cover the anchor 12 and can also avoid the rainproof and waterproof function of the anchor 12.

[0066] Specifically, the lower seat plate insert 702 includes a second spherical segment surface 7021 and a second threaded hole 7022 . The second spherical segment surface 7021 is used to form a continuous concave spherical structure with the first spherical segment surface 7012 , and the second threaded hole 7022 is used to connect to the lower seat plate base plate 701 .

[0067] The lower seat plate plug plate 702 structure is configured to form a concave spherical structure with the lower seat plate base plate 701, thereby increasing the contact area between the two, improving the stability of the connection, helping to disperse stress, preventing damage caused by local stress concentration, and reducing the height of the seismic isolation bearing to make it consistent with ordinary spherical bearings, thereby facilitating the replacement of damaged bearings and improving work efficiency.

[0068] Preferably, the radius of the first spherical segment surface 7012 is the same as the radius of the second spherical segment surface 7021 .

[0069] This setting ensures that the two spherical segments have the same radius, which can ensure perfect docking between the two and form a seamless spherical structure, so that the external stress is evenly distributed over the entire connection surface, avoiding damage caused by local stress concentration and improving overall durability and service life.

[0070] Preferably, the discontinuous spherical segments on the upper portion of the lower seat plate 7 together form a complete spherical segment, which is the sliding area of ​​the friction pair of the lower seat plate 7. The same radius of the two spherical segments ensures perfect docking between the two, forming a seamless spherical structure and better achieving the isolation and shock absorption effect.

[0071] Specifically, the upper portion of the lower seat plate 7 may be a discontinuous spherical segment surface.

[0072] This arrangement can reduce the difficulty of processing the spherical segment surface, and avoid damage to the spherical segment surface caused by stress concentration due to a reduction in the contact area between the lower seat plate base plate 701 and the lower seat plate insert plate 702 caused by changes in the spherical surface curvature.

[0073] Specifically, the vertical projection of the anchor member 12 passing through the lower seat plate base plate 701 overlaps with the sliding area of ​​the friction pair.

[0074] The arrangement of the anchor 12 overlapping the sliding area of ​​the friction pair can make the first threaded hole 7011 of the present invention consistent in size with the anchor hole under the original spherical bearing, thereby facilitating the installation and fixation of the seismic isolation bearing.

[0075] Preferably, the vertical projection of the anchor 12 overlaps the sliding area of ​​the friction pair partially or completely.

[0076] This arrangement expands the installation position range of the anchor 12 so that it is not restricted by the spherical segment surface, and helps to determine the installation of the anchor 12 according to the position and size of the damaged ordinary spherical anchor hole.

[0077] Specifically, the spherical surfaces of the first spherical segment surface 7012 and the second spherical segment surface 7021 are both coated or plated.

[0078] This setting helps to slow down the wear of the spherical segment surface and extend the service life of the seismic isolation bearing.

[0079] Specifically, the lower seat plate base plate 701 includes a platform, the lower seat plate inserting plate 702 includes a platform vacant position, the platform is arranged in the platform vacant position, and the lower seat plate inserting plate 702 cooperates and contacts with the platform side of the lower seat plate 701.

[0080] The platform setting enables the spherical segment surface to better transfer the impact force it receives to the lower seat plate base plate 701, preventing the lower seat plate plug-in plate 702 from directly applying part of the force to the lower seat plate base plate 701, thereby preventing the lower seat plate plug-in plate 702 from being damaged due to excessive force; at the same time, the assembly of the lower seat plate plug-in plate 702 is limited.

[0081] Specifically, the anchor 12 is an independent and complete anchoring structure; the spherical surface of the lower seat plate base plate 701 cooperates with the spherical surface of the lower seat plate insert 702 and the spherical non-metallic slide plate inlaid with the lower spherical surface of the middle seat plate 5 to form a complete lower spherical friction pair 6; the spherical non-metallic slide plate inlaid on the upper spherical surface of the middle seat plate 5 and the spherical stainless steel slide plate welded to the upper seat plate 3 form an upper spherical friction pair 4.

[0082] The setting of the seismic isolation bearing can better buffer and absorb the displacement caused by factors such as daily temperature, and can buffer and absorb the greater impact force during an earthquake, thereby avoiding damage to the bridge.

[0083] Specifically, the lower seat plate inserting plate 702 includes a second spherical segment surface 7021 and a second threaded hole 7022 . The cross section of the lower seat plate inserting plate 702 is a quarter of a circle. The lower seat plate inserting plate 702 is connected to the lower seat plate base plate 701 via screws.

[0084] The arrangement of the lower seat plate insert 702 can reduce the overall weight of the device, facilitate operation and installation during on-site construction, and improve the efficiency of replacing the support.

[0085] A method for installing an assembled seismic isolation bearing with a novel anchoring structure, the specific steps are as follows:

[0086] S1: Before the support leaves the factory, the anchor 12 needs to be inserted into the first threaded hole 7011 of the lower seat plate base plate 701;

[0087] S2: During on-site installation, the installation of the bearing and the beam is consistent with the original ordinary spherical bearing;

[0088] S3: When installing with the pier pad stone, the anchor 12 should be tightened first, and then the lower seat plate plug 702 should be covered and closed with the anchor 12, and then connected and fixed with the lower seat plate base plate 701 to complete the overall installation of the support.

[0089] The present invention adopts the above technical solution to achieve the following beneficial effects: a new anchoring structure and installation method for assembled seismic isolation bearings:

[0090] 1) The novel anchoring structure of the lower base plate of the seismic isolation support of the present invention is relatively low in height, making it easy to assemble.

[0091] 2) The new anchoring structure adopted by the seismic isolation bearing of the present invention is placed in the anchor bolt mouth of the lower seat plate in advance before leaving the factory. Compared with the usual design, the height of the seismic isolation bearing can be reduced to the height of the original spherical bearing, avoiding the problem of increased bearing height caused by installing bolts after the bearing is assembled.

[0092] 3) The seismic isolation bearing of the present invention has a lower seat plate assembled structure through a lower seat plate plug-in plate, and forms a complete metal friction spherical structure, which realizes the vertical support and seismic isolation sliding function of the bearing under earthquake.

[0093] 4) Under earthquake conditions, the seismic isolation bearing of the present invention plays a seismic isolation function by extending the bridge isolation period and consuming energy through double-spherical friction.

[0094] 5) The lower seat plate insert structure of the seismic isolation support of the present invention has a simple structure, a small mating surface with the lower seat plate of the support, and is easy to install.

[0095] 6) The anchor bolt interface and height of the seismic isolation bearing of the present invention are completely consistent with those of the original spherical bearing, thus realizing the replacement of the spherical bearing with the seismic isolation bearing.

[0096] 7) The seismic isolation support of the present invention has smaller dimensions and lower height than the original seismic isolation support structure, and the assembled structure is less difficult to process and has better economy.

[0097] Example 1

[0098] A novel anchor assembly design and overall installation method for a unidirectional, movable, three-friction-pair assembled seismic isolation bearing is presented. The bearing primarily comprises a top plate 1, a flat friction pair 2, an upper plate 3, an upper spherical friction pair 4, a middle plate 5, a lower spherical friction pair 6, a lower plate assembly, a seal 8, and an anchor 12. The bearing's lower plate 7 utilizes an assembled structure. The vertical projection of the anchor 12, which passes through the lower plate baseplate 701, overlaps the friction pair sliding area of ​​the lower plate 7. The upper portion of the lower plate baseplate 701 can be a discontinuous spherical segment. The upper portion of the lower plate insert 702 is provided with a spherical segment with the same radius and matching dimensions as the spherical surface of the lower plate baseplate 701. Together with the discontinuous spherical segment on the upper portion of the lower plate baseplate 701, this segment forms a complete spherical segment, representing the friction pair sliding area of ​​the lower plate 7. The lower plate insert 702 is positioned above the novel anchor 12, which passes through the bottom plate of the lower plate baseplate 701 and is tightened. The discontinuous spherical surface of the lower seat plate base plate 701 and the spherical surface of the lower seat plate insert 702 are both coated or plated; the bottom of the lower seat plate insert 702 covers the first groove 1201 of the new anchor 12; the lower seat plate insert 702 is in contact with the platform side of the lower seat plate base plate 701.

[0099] The discontinuous spherical surface of the lower seat plate base plate 701, the spherical surface of the lower seat plate insert 702, and the spherical non-metallic slide plate embedded in the lower spherical surface of the middle seat plate 5 form a complete lower spherical friction pair 6. The spherical non-metallic slide plate embedded in the upper spherical surface of the middle seat plate 5 and the spherical stainless steel slide plate welded to the upper seat plate 3 form the upper spherical friction pair 4. The flat non-metallic slide plate embedded in the upper seat plate 3 and the flat stainless steel slide plate welded to the lower surface of the top seat plate 1 form the flat friction pair 2. The top seat plate 1 is equipped with permanent stops on all four sides, and a horizontal displacement gap is reserved between it and the center platform of the upper seat plate 3 in the direction of movement. A guide friction pair 9 is provided in the limiting direction. The bottom surface of the upper seat plate 3 is provided with a concave spherical surface, and a guide friction pair 9 is provided between it and the limiting plate 10.

[0100] Support installation method: S1: Before the support leaves the factory, the anchor 12 needs to be inserted into the first threaded hole 7011 of the lower seat base plate 701;

[0101] S2: During on-site installation, the installation of the bearing and the beam is consistent with the original ordinary spherical bearing;

[0102] S3: When installing with the pier pad stone, the anchor 12 should be tightened first, and then the lower seat plate plug 702 should be covered and closed with the anchor 12, and then connected and fixed with the lower seat plate base plate 701 to complete the overall installation of the support.

[0103] In the seismic isolation bearing of the present embodiment 1, the lower seat base plate 701 is assembled through the lower seat plate plug plate 702 to form a complete metal friction spherical structure, thereby realizing the vertical support and seismic isolation sliding function of the bearing under earthquake.

[0104] The anchor 12 is a stud.

[0105] The vertical projection of the anchor piece 12 under the seismic isolation bearing of the first embodiment partially overlaps with the sliding area of ​​the friction pair, and the interface size of the anchor bolt under the original spherical bearing can be kept consistent.

[0106] The seismic isolation bearing anchor 12 of this embodiment 1 is pre-installed in the first threaded hole 7011 before leaving the factory. Compared with conventional designs, the height of the seismic isolation bearing can be reduced to the original spherical bearing height, avoiding the problem of increased bearing height caused by installing bolts after the bearing is assembled.

[0107] The first threaded hole 7011 and the height of the lower part of the seismic isolation bearing of this embodiment 1 are completely consistent with those of the original spherical bearing, thus achieving the replacement of the spherical bearing by the seismic isolation bearing.

[0108] The seismic isolation support of the first embodiment is smaller in size and lower in height than the original seismic isolation support structure, and has better economic efficiency.

[0109] Under normal working conditions of the seismic isolation bearing of this embodiment 1, the limit plate 10 constrains the spherical sliding of the upper and lower spherical friction pairs 6, and only the plane friction pair 2 realizes the horizontal plane sliding function of the beam body in the normal temperature rise in the active direction, ensuring the smoothness of the track; it is limited in the limiting direction; the bearing rotation realizes the vertical rotation function through the two upper spherical friction pairs 4 and the lower spherical friction pair 6; under an earthquake, the bearing limit plate 10 is sheared, and the constraints of the upper spherical friction pair 4 and the lower spherical friction pair 6 are released, and the bridge isolation period is extended through the friction pendulum to play the isolation function; shock absorption is achieved through spherical friction energy consumption; at the end of the earthquake, the horizontal component of the upper structure along the tangent direction of the spherical surface and the horizontal excitation of the earthquake jointly provide a restoring force, so that the beam body has the function of self-resetting after the earthquake.

[0110] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An assembled seismic isolation bearing with a new anchoring structure, characterized in that: The invention comprises a lower seat plate (7), a middle seat plate (5), and an upper seat plate (3) which are arranged in sequence from bottom to top. The lower seat plate (7) is an assembled structure. The lower seat plate (7) comprises a lower seat plate base plate (701), a lower seat plate plug plate (702), and an anchor (12). The lower seat plate base plate (701) and the lower seat plate plug plate (702) are connected as a whole. The anchor (12) passes through the lower seat plate base plate (701) and is connected to the pier pad stone. The anchor (12) is completely inserted into the lower seat plate base plate (701), so as to reduce the difficulty of assembly when installing the assembled seismic isolation bearing.

2. The assembled seismic isolation bearing with a novel anchoring structure according to claim 1 is characterized in that: The lower seat plate base plate (701) includes a first spherical segment surface (7012) and at least two first threaded holes (7011), wherein the first spherical segment surface (7012) is arranged on the upper part of the lower seat plate base plate (701), and the first threaded holes (7011) are evenly distributed along the circumference of the first spherical segment surface (7012), and the first threaded holes (7011) are used for the anchor (12) to pass through the lower seat plate base plate (701) to connect to the pier pad stone.

3. The assembled seismic isolation bearing with a novel anchoring structure according to claim 2 is characterized in that: The anchor (12) is a stud, and a first groove (1201) is provided at the top center of one end of the anchor (12) for conveniently tightening the anchor (12).

4. The assembled seismic isolation bearing with a novel anchoring structure according to claim 3 is characterized in that: A groove is provided at the bottom of the anchor (12), and an elastic body (13) is provided in the groove to prevent the anchor (12) from loosening.

5. The assembled seismic isolation bearing with a novel anchoring structure according to claim 2 is characterized in that: The anchor (12) is a stepped stud, the upper diameter of the anchor (12) is large, and the lower diameter is the normal anchor bolt diameter used for supports of the same tonnage.

6. The assembled seismic isolation bearing with a novel anchoring structure according to claim 5 is characterized in that: The cross section of the first threaded hole (7011) is stepped.

7. The assembled seismic isolation bearing with a novel anchoring structure according to claim 3 or 5, characterized in that: When the vertical projection of the anchor (12) overlaps with the first spherical segment surface (7012), a connecting block (14) is provided on the top of the anchor (12), and the top of the connecting block (14) and the first spherical segment surface (7012) form a continuous spherical segment surface.

8. The assembled seismic isolation bearing with a novel anchoring structure according to claim 2 is characterized in that: The lower seat plate insert (702) includes a second spherical segment surface (7021) and a second threaded hole (7022), wherein the second spherical segment surface (7021) is used to form a continuous concave spherical structure with the first spherical segment surface (7012), and the second threaded hole (7022) is used to connect the lower seat plate base plate (701).

9. The assembled seismic isolation bearing with a novel anchoring structure according to claim 8 is characterized in that: The spherical surfaces of the first spherical segment surface (7012) and the second spherical segment surface (7021) are both coated or plated.

10. The assembled seismic isolation bearing with a novel anchoring structure according to claim 2 is characterized in that: The lower seat plate insert (702) comprises a second spherical segment surface (7021) and a second threaded hole (7022). The cross section of the lower seat plate insert (702) is a quarter-circular ring. The lower seat plate insert (702) is connected to the lower seat plate base plate (701) via screws.

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