Fabricated seismic mitigation and isolation support with novel anchoring structure and mounting method of fabricated seismic mitigation and isolation support

Abstract

The invention relates to the technical field of bridge structures or buildings, in particular to a fabricated seismic mitigation and isolation support with a novel anchoring structure and a mounting method.The fabricated seismic mitigation and isolation support is characterized in that a lower seat plate, a middle seat plate and an upper seat plate are sequentially arranged from bottom to top, and the lower seat plate is of a fabricated structure and 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. The anchoring part is improved, so that the height of the anchoring part can be reduced while the connecting length is guaranteed, and 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 invention relates to the technical field of bridge structures or building techniques, and in particular to an assembled seismic isolation support with a novel anchoring structure and an installation method thereof. Background Art

[0002] With the development of existing survey technology and the deepening of recent post-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 will be used to replace the spherical bearings to meet the adjusted bridge defense level requirements in high-intensity earthquake zones.

[0003] The anchor bolt interface between the existing railway bridge seismic isolation bearing and the beam body is relatively easy to design; however, the height of the seismic isolation bearing is generally higher than that of the ordinary spherical bearing, and the size of the lower seat plate is also larger. At present, it has been proposed that the prefabricated structure can simultaneously meet the requirements of the installation height and the anchor bolt interface at the bearing pad stone.

[0004] Publication No.: CN116607405A discloses an assembled seismic isolation bearing and its installation method, wherein the lower seat plate assembly comprises a main body and a plug plate, wherein the main body comprises a first spherical segment surface, wherein the plug plate comprises a second spherical segment surface, wherein the first spherical segment surface and the second spherical segment surface form a continuous concave spherical surface structure, wherein an anchor hole is provided on the main body, wherein the anchor bolt is inserted into the anchor hole, wherein the plug plate covers the lower anchor bolt, wherein a groove is provided at the lower end of the plug plate, wherein the lower anchor bolt is located in the groove. The anchor bolt head of the invention protrudes from the main body, and a groove is provided at the bottom of the plug 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 a lack of sufficient installation space for the anchor bolts during on-site assembly, making the assembly of the seismic isolation bearing difficult and having low reliability. Summary of the invention

[0006] In view of this, the present invention aims to propose an assembled seismic isolation bearing and installation method with a novel anchoring structure, so as to solve the problems of insufficient installation space for anchor bolts during on-site assembly of existing assembled seismic isolation bearings, great difficulty in assembling the seismic isolation bearings and low reliability.

[0007] The prior art is difficult to assemble, and there is the problem of inconvenience in tightening the anchor bolts and the problem of loose fixation due to insufficient tightening.

[0008] The existing unidirectional movable three-friction pair assembled seismic isolation bearing mainly includes the top seat plate, the plane friction pair, the upper seat plate, the upper spherical friction pair, the middle seat plate, the lower spherical friction pair, the lower seat plate assembly, the seal and anchor bolts. The anchor bolts need to be installed on the lower seat plate before the bearing leaves the factory to ensure that the bottom of the anchor bolts is flush with the bottom surface of the lower base. This makes the anchor bolts very close to the upper seat plate during on-site construction, resulting in a lack of sufficient installation space for the anchor bolts during on-site assembly, making assembly more difficult.

[0009] The present invention 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 size and height, the position of the bolt hole of the ordinary spherical bearing and the height between the bridge and the pier need to be different from those of a 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 should be avoided. Therefore, while changing the anchor of the seismic isolation bearing, it is necessary to improve other parts.

[0010] The anchoring structure of the present invention 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 invention is achieved as follows: an assembled seismic isolation bearing with a new anchoring structure and an installation method, comprising a lower seat plate, a middle seat plate, and an upper seat plate arranged in sequence from bottom to top, the lower seat plate being an assembled structure, the lower seat plate comprising 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 as a whole, the anchor passes through the lower seat plate base plate and is connected to the pier pad stone, and the anchor all enters the lower seat plate base plate, which is used to reduce the difficulty of assembly during the installation of the assembled seismic isolation bearing; when the vertical projection of the anchor overlaps with the first spherical segment surface, a connecting block is arranged on the top of the anchor, and the top of the connecting block forms a continuous spherical segment surface with the first spherical segment surface.

[0012] Furthermore, the lower seat plate base plate includes a first spherical surface and at least two first threaded holes, the first spherical 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 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 to facilitate tightening the anchor.

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

[0015] Furthermore, the anchor is a stepped stud, the upper diameter of the anchor is large, and the lower diameter is 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, 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 surface structure with the first spherical segment surface, and the second threaded hole is used to connect the lower seat plate base plate.

[0018] Furthermore, the spherical surfaces of the first spherical segment surface and the second spherical segment surface are both coated or plated.

[0019] 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.

[0020] A method for installing an assembled seismic isolation bearing with a novel anchoring structure comprises the following specific steps:

[0021] S1: Before the support leaves the factory, the anchor needs to be inserted into the first threaded hole of the base plate of the lower seat;

[0022] S2: During on-site installation, the installation of the bearing and the beam is consistent with the original ordinary spherical bearing;

[0023] S3: When installing with the pier pad stone, the anchor should be tightened first, and then the lower seat plate plug plate should be covered and closed with the anchor, and then connected and fixed with the lower seat plate base plate to complete the overall installation of the support.

[0024] Compared with the prior art, the assembled seismic isolation bearing with a novel anchoring structure and the installation method of the present invention have the following advantages:

[0025] 1. The present invention improves the anchor so that the height of the anchor can be reduced while ensuring the connection length, thereby facilitating installation; at the same time, the anchor is optimized in design, thereby improving the self-locking effect of the anchor and the reliability of the device.

[0026] 2. The present invention arranges a connector with a spherical segment surface at the top of the anchor, and 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.

[0027] 3. The present invention sets a new anchoring structure for the lower seat plate of the seismic isolation bearing, and 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.

[0028] 4. 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 A schematic diagram of the structure of the seismic isolation support in the present invention (limiting direction);

[0031] Figure 2 A schematic diagram of the structure of the seismic isolation support in the present invention (direction of movement);

[0032] Figure 3 A schematic diagram of the cross-section AA structure of the seismic isolation bearing in the present invention;

[0033] Figure 4 A schematic diagram of the cross-section BB structure of the seismic isolation bearing in the present invention;

[0034] Figure 5 A schematic diagram of the top view of the lower base plate of the seismic isolation support in the present invention;

[0035] Figure 6 A schematic diagram of the main structure of the lower seat plate plugging plate of the seismic isolation support in the present invention;

[0036] Figure 7 A schematic diagram of the top view of the lower seat plate plugging plate of the seismic isolation support in the present invention;

[0037] Figure 8 A schematic diagram of the structure of the lower seat plate insert of the seismic isolation support in the present invention when viewed from the bottom;

[0038] Fig. 9 A schematic diagram of the main structure of the anchor member of the seismic isolation support in the present invention;

[0039] Fig.10 A schematic diagram of the top view of the anchor member of the seismic isolation support in the present invention;

[0040] Fig.11 A schematic diagram of the assembly structure of the new anchor bolt structure and the lower seat plate plug plate of the seismic isolation support in the present invention;

[0041] Fig.12 A schematic diagram of the DD structure of the new anchor bolt structure and the lower seat plate plug assembly section of Example 1 of the present invention;

[0042] Description of reference numerals:

[0043] 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 plug plate; 7021. Second spherical segment surface; 7022. Second threaded hole; 8. Seal; 9. Guide friction pair; 10. Limit plate; 12. Anchor; 1201. First groove. DETAILED DESCRIPTION

[0044] In order to make the technical means, objectives and effects of the present invention easy to understand, the embodiments of the present invention are described in detail below with reference to specific drawings.

[0045] It should be noted that all the terms used in the present invention to indicate directionality and position, such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "top", "lower", "lateral", "longitudinal", "center", etc., are only used to explain the relative positional relationship and connection status between the components in a certain state, and are only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0046] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the description of this specification, the description with reference to the terms "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 the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0048] The present invention discloses an assembled seismic isolation bearing with a novel anchoring structure and an installation method, comprising 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, 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 as a whole, the anchor 12 passes through the lower seat plate base plate 701 and is connected to the pier pad stone, and the anchor 12 completely enters the lower seat plate base plate 701, so as to reduce the difficulty of assembly during the installation of the assembled seismic isolation bearing.

[0049] The arrangement allows the anchor 12 to fully enter the lower seat plate base plate 701, thereby 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 for the seismic isolation bearing, and reducing the difficulty of assembling and installing the assembled seismic isolation bearing to replace the existing damaged spherical bearing; at the same time, the connection length between the anchor 12 and the lower seat plate base plate 701 is ensured, avoiding accelerated wear of the lower seat plate base plate 701 due to the reduction in the connection length, thereby extending the service life of the bearing.

[0050] The lower seat plate 7 is a prefabricated 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 plate 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 and greater assembly difficulty during on-site assembly.

[0051] Specifically, the lower seat plate base plate 701 includes a first spherical surface 7012 and at least two first threaded holes 7011. The first spherical 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 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.

[0052] 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 stone are firmly fixed together, thereby improving the stability and safety of the overall structure.

[0053] Preferably, four first threaded holes 7011 are provided.

[0054] 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, reducing the force on a single anchor 12 during use of the seismic isolation bearing, further improving the overall stability and reliability of the seismic isolation bearing, while keeping the production cost at a low level.

[0055] Specifically, 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 .

[0056] The anchor 12 is set as a stud, which avoids the abutment 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 difficulty of assembly and installation when the assembled seismic isolation bearing replaces the existing damaged spherical bearing.

[0057] Preferably, the cross section of the first groove 1201 is hexagonal.

[0058] Preferably, a groove is provided at the bottom of the anchor 12, and an elastic body is provided in the groove to prevent the anchor 12 from loosening.

[0059] The anchor 12 is arranged such that the elastic body is slightly convex on the bottom surface when not installed, and the elastic body is compressed under pressure when tightened, 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.

[0060] Specifically, the cross section of the first threaded hole 7011 is stepped.

[0061] 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, prolongs the service life of the support, and facilitates the installation of the anchor 12.

[0062] Specifically, the anchor 12 is a stepped threaded stud with a large upper diameter and a lower diameter that is the normal anchor bolt diameter used for supports of the same tonnage.

[0063] The anchor 12 is configured as a stepped threaded stud, so that the anchor 12 cooperates with the first threaded hole 7011 to avoid over-tightening of the anchor 12 and ensure the connection length between the anchor 12 and the first threaded hole 7011.

[0064] Specifically, a connecting block is provided on the top of the anchor 12 , and the top of the connecting block and the first spherical segment surface 7012 form a continuous spherical segment surface.

[0065] 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.

[0066] At this time, the lower seat plate plug 702 does not need to cover the anchor 12 and can also avoid the rainproof and waterproof function of the anchor 12.

[0067] 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 the lower seat plate base plate 701 .

[0068] 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 an ordinary spherical bearing, thereby facilitating the replacement of damaged bearings and improving work efficiency.

[0069] Preferably, the radius of the first spherical segment surface 7012 is the same as the radius of the second spherical segment surface 7021 .

[0070] This setting has the same radius of the two spherical surfaces, which can ensure that the two are perfectly connected to form a seamless spherical structure, so that the external stress is evenly dispersed to the entire connection surface, avoiding damage caused by local stress concentration, and improving overall durability and service life.

[0071] Preferably, the discontinuous spherical surface on the upper part of the lower seat plate 7 together forms a complete spherical surface, which is the sliding area of ​​the friction pair of the lower seat plate 7. The two spherical surfaces are set to have the same radius, which can ensure that the two are perfectly connected to form a seamless spherical structure, and better achieve the isolation and shock absorption effect.

[0072] Specifically, the upper portion of the lower seat plate 7 may be a discontinuous spherical segment surface.

[0073] This arrangement can reduce the difficulty of processing the spherical segment surface, and avoid the reduction of the contact surface between the lower seat plate base plate 701 and the lower seat plate insert plate 702 due to the change of the spherical surface curvature, and avoid stress concentration causing damage to the spherical segment surface.

[0074] Specifically, the vertical projection of the anchor 12 passing through the lower seat plate base plate 701 overlaps with the sliding area of ​​the friction pair.

[0075] 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.

[0076] Preferably, the vertical projection of the anchor 12 overlaps the sliding area of ​​the friction pair partially or completely.

[0077] This arrangement expands the installation position range of the anchor 12 so that it is not limited by the spherical surface, and helps to determine the installation of the anchor 12 according to the position and size of the damaged ordinary spherical anchor hole.

[0078] Specifically, the spherical surfaces of the first spherical segment surface 7012 and the second spherical segment surface 7021 are both coated or plated.

[0079] This setting helps to slow down the wear of the spherical segment surface and extend the service life of the seismic isolation bearing.

[0080] Specifically, the lower seat plate base plate 701 includes a platform, the lower seat plate plugging plate 702 includes a platform vacant position, the platform is arranged in the platform vacant position, and the lower seat plate plugging plate 702 cooperates and contacts with the platform side of the lower seat plate 701.

[0081] The platform allows the spherical surface to better transfer the impact force to the lower seat plate base plate 701, preventing the lower seat plate plug plate 702 from directly acting part of the force on the lower seat plate base plate 701, thereby preventing the lower seat plate plug plate 702 from being damaged due to excessive force; at the same time, the assembly of the lower seat plate plug plate 702 is limited.

[0082] 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 plug plate 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.

[0083] The setting of the seismic isolation bearing can better buffer and absorb the displacement caused by daily temperature and other factors, and can buffer and absorb the greater impact force during an earthquake to avoid damage to the bridge.

[0084] 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.

[0085] The arrangement of the lower seat plate plug plate 702 can reduce the overall weight of the device, facilitate operation and installation during on-site construction, and improve the work efficiency of replacing the support.

[0086] An installation method of an assembled seismic isolation bearing with a novel anchoring structure and an installation method thereof, the specific steps are as follows:

[0087] 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;

[0088] S2: During on-site installation, the installation of the bearing and the beam is consistent with the original ordinary spherical bearing;

[0089] S3: When installing with the pier pad stone, the anchor 12 should be tightened first, and then the lower seat plate plug plate 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.

[0090] The present invention adopts the above technical solution to achieve the following beneficial effects: a new anchoring structure and installation method of assembled seismic isolation bearing:

[0091] 1) The new anchoring structure of the lower base plate of the seismic isolation support of the present invention has a relatively low height and is easy to assemble.

[0092] 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.

[0093] 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 surface structure, which realizes the vertical support and seismic isolation sliding functions of the bearing under earthquake.

[0094] 4) Under earthquake conditions, the seismic isolation bearing of the present invention can play a seismic isolation function by extending the seismic isolation period of the bridge and consuming energy through friction of the double spherical surfaces.

[0095] 5) The lower seat plate plug 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.

[0096] 6) The interface and height of the anchor bolts under the seismic isolation bearing of the present invention are completely consistent with those of the original spherical bearing, thus achieving the replacement of the spherical bearing with the seismic isolation bearing.

[0097] 7) The seismic isolation support of the present invention has smaller structural dimensions and lower height than the original seismic isolation support, and the assembled structure is less difficult to process and has better economy.

[0098] Example 1

[0099] A new anchor bolt assembly design and overall installation method for a unidirectional movable three-friction pair assembled seismic isolation bearing, the bearing mainly includes a top seat plate 1, a plane friction pair 2, an upper seat plate 3, an upper spherical friction pair 4, a middle seat plate 5, a lower spherical friction pair 6, a lower seat plate assembly, a seal 8 and an anchor 12. The lower seat plate 7 of the bearing adopts an assembled structure, and the vertical projection of the anchor 12 passing through the lower seat plate base plate 701 overlaps with the sliding area of ​​the friction pair of the lower seat plate 7. The upper part of the lower seat plate base plate 701 can be a discontinuous spherical segment surface; the upper part of the lower seat plate plug plate 702 is provided with a spherical segment surface with the same radius and matching size as the spherical surface of the lower seat plate base plate 701, which together with the discontinuous spherical segment surface on the upper part of the lower seat plate base plate 701 form a complete spherical segment surface, which is the sliding area of ​​the friction pair of the lower seat plate 7. The lower seat plate plug plate 702 is located on the upper part of the new anchor 12; the new anchor 12 passes through the bottom plate of the lower seat plate base plate 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 plug plate 702 are both coated or plated; the bottom of the lower seat plate plug plate 702 covers the first groove 1201 of the new anchor 12; the lower seat plate plug plate 702 is in contact with the platform side of the lower seat plate base plate 701.

[0100] The discontinuous spherical surface of the lower seat plate base plate 701 and the spherical surface of the lower seat plate insert 702 and the spherical non-metallic slide plate inlaid on the lower spherical surface of the middle seat plate 5 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; the plane non-metallic slide plate inlaid on the upper seat plate 3 and the plane stainless steel slide plate welded on the lower plane of the top seat plate 1 form a plane friction pair 2. The top seat plate 1 is provided with permanent blocks around it, and a horizontal displacement gap is reserved with the center platform of the upper seat plate 3 in the moving direction, and 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.

[0101] 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 plate base plate 701;

[0102] S2: During on-site installation, the installation of the bearing and the beam is consistent with the original ordinary spherical bearing;

[0103] S3: When installing with the pier pad stone, the anchor 12 should be tightened first, and then the lower seat plate plug plate 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.

[0104] In the seismic isolation bearing of the present embodiment 1, the lower seat plate base plate 701 is assembled through the lower seat plate plug plate 702 to form a complete metal friction spherical structure, so as to realize the vertical support and seismic isolation sliding function of the bearing under earthquake.

[0105] The anchor 12 is a stud.

[0106] The vertical projection of the anchor 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.

[0107] The seismic isolation support anchor 12 of this embodiment 1 is placed in the first threaded hole 7011 before leaving the factory. Compared with the usual design, the height of the seismic isolation support can be reduced to the original spherical support height, avoiding the problem of increased support height caused by installing bolts after the support is assembled.

[0108] The first threaded hole 7011 and the height of the seismic isolation bearing of the first embodiment are completely consistent with those of the original spherical bearing, thus achieving the replacement of the spherical bearing by the seismic isolation bearing.

[0109] The seismic isolation support of the present embodiment 1 is smaller in size and lower in height than the original seismic isolation support structure, and has better economic performance.

[0110] 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, thereby 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 off, and the constraints of the upper spherical friction pair 4 and the lower spherical friction pair 6 are released, and the seismic isolation period of the bridge is extended through the friction pendulum to play the seismic 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.

[0111] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An assembled seismic isolation bearing with a novel anchoring structure, characterized in that: The specific steps include: a lower seat plate (7), a middle seat plate (5), and an upper seat plate (3) are arranged in sequence from bottom to top, the lower seat plate (7) is an assembled structure, the lower seat plate (7) includes 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, and the anchor (12) completely enters the lower seat plate base plate (701), which is used to reduce the assembly difficulty when installing the assembled seismic isolation bearing; when the vertical projection of the anchor (12) overlaps with the first spherical segment surface (7012), a connecting block is arranged on the top of the anchor (12), and the top of the connecting block and the first spherical segment surface (7012) form a continuous spherical segment surface.

2. The assembled seismic isolation support with a novel anchoring structure according to claim 1 is characterized in that: The lower seat plate base plate (701) comprises 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 support 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 support with a novel anchoring structure according to claim 3 is characterized in that: A groove is arranged at the bottom of the anchor (12), and an elastic body is arranged in the groove to prevent the anchor (12) from loosening.

5. The assembled seismic isolation support 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 a support of the same tonnage.

6. The assembled seismic isolation support 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 support 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), 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).

8. The assembled seismic isolation support with a novel anchoring structure according to claim 7 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.

9. The assembled seismic isolation support 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 of a circle; the lower seat plate insert (702) is connected to the lower seat plate base plate (701) via screws.

10. A method for installing an assembled seismic isolation support with a novel anchoring structure, characterized in that: 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; S2: During on-site installation, the installation of the bearing and the beam is consistent with the original ordinary spherical bearing; S3: When installing with the pier pad stone, the anchor 12 should be tightened first, and then the lower seat plate plug plate 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.

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