Limiting device of seismic mitigation and isolation support and construction method

Abstract

The invention discloses a limiting device of a seismic mitigation and isolation support and a construction method, and relates to the technical field of civil engineering seismic design, the limiting device comprises an upper support plate and a lower support plate, and the front, rear, left and right sides of the side walls of the opposite sides of the upper support plate and the lower support plate are provided with an upper base and a lower base through quick-release clamping mechanisms respectively; the upper base is detachably mounted at the bottom end of the upper support plate through the quick-release clamping mechanism, and the lower base is detachably mounted at the bottom end of the lower support plate through the quick-release clamping mechanism, so that the limiting pipe below the upper support plate is located between the two groups of semicircular baffles and is limited; the spacing adjusting mechanism in the dynamic adjusting box drives the two groups of supporting blocks at the top end of the spacing adjusting mechanism to drive the two groups of semicircular baffles to move in the same direction or in the opposite directions, so that the spacing adjusting mechanism can be used for adjusting the spacing of the spacing adjusting mechanism, and the spacing adjusting mechanism can be used for adjusting the spacing of the spacing adjusting mechanism. The distance between the semicircular baffle and the limiting pipe is convenient to dynamically adjust, and the maximum displacement threshold value of limiting can be adjusted according to the seismic isolation requirement.

Description

Technical Field

[0001] The present invention relates to the technical field of earthquake-resistant design of civil engineering, and in particular to a limiting device of a seismic isolation bearing and a construction method thereof. Background Art

[0002] Seismic isolation bearings are an isolation layer installed between the superstructure and foundation of a building or bridge. They significantly reduce the impact of earthquakes on the structure by extending the natural vibration period of the structure, absorbing and dissipating seismic energy, and protecting the safety of the main structure. As an advanced seismic technology, they play an important role in engineering structures.

[0003] The limit device of the seismic isolation bearing limits the displacement of the bearing under normal and frequent earthquake conditions to prevent structural damage. When the seismic force exceeds the set value, the limit device is sheared and destroyed, and the bearing plays the seismic isolation function to protect the safety of the structure. Timely replacement of the damaged limit device is very important to ensure the normal operation of the bearing and structure.

[0004] Most of the existing limit devices of seismic isolation bearings have fixed structures and are generally fixedly connected to the upper and lower bearing plates by welding. They are difficult to disassemble and replace after damage, and the bearing needs to be replaced as a whole, which is costly and has a long construction period, and also has a negative impact on the post-earthquake repair efficiency. In addition, the limit mechanism is fixed and cannot be dynamically adjusted. The maximum displacement threshold of the limit cannot be adjusted in real time according to the seismic isolation requirements. It has low applicability and is inconvenient to use. Therefore, the present invention proposes a limit device and a construction method for a seismic isolation bearing to solve the problems existing in the prior art. Summary of the Invention

[0005] In response to the above problems, the purpose of the present invention is to propose a limiting device and construction method for a seismic isolation bearing, so as to solve the problem that the limiting device of the existing seismic isolation bearing is generally fixedly connected to the upper and lower bearing plates by welding, which is difficult to disassemble and replace after damage, and the limiting mechanism is fixed and cannot be dynamically adjusted, and the maximum displacement threshold of the limit cannot be adjusted in real time according to the seismic isolation requirements.

[0006] In order to achieve the purpose of the present invention, the present invention is implemented through the following technical solutions: a limiting device and construction method of a seismic isolation bearing, including an upper bearing plate and a lower bearing plate, the front, rear, left and right sides of the side walls of the upper and lower bearing plates on opposite sides are respectively installed with an upper base and a lower base through a quick-release clamping mechanism, the bottom end of the upper base is fixed to the limiting tube by a shear bolt, and a dynamic adjustment box is fixed to the top of the lower base, and the top of the dynamic adjustment box is symmetrically provided with support blocks driven by a spacing adjustment mechanism. The two groups of support blocks at the top of the front and rear groups of dynamic adjustment boxes are symmetrically distributed on the left and right, and the two groups of support blocks at the top of the left and right groups of dynamic adjustment boxes are symmetrically distributed front and back, and the top of the support block is fixed with a semicircular baffle adapted to the limiting tube.

[0007] A further improvement is that anchor bolt holes are provided at the four corners of the upper support plate and the lower support plate, a strain gauge sensor is embedded and fixed on the inner side of the semicircular baffle, and the strain gauge sensor is wirelessly connected to the control device at the user end.

[0008] A further improvement is that the bottom end of the limiting tube is open and the interior is hollow, the bottom end of the upper base is provided with a bolt connection hole adapted to the shear bolt, the shear bolt thread passes through the top end of the limiting tube and is threadedly connected to the bolt connection hole.

[0009] A further improvement is that the spacing adjustment mechanism includes a bidirectional screw that is rotatably connected to the inside of the dynamic adjustment box and driven to rotate by a knob, and a threaded block that is threadedly sleeved on both sides of the bidirectional screw, and a connecting block that slides through the top of the dynamic adjustment box is fixed between the threaded block and the support block.

[0010] Further improvements are: the quick-release clamping mechanism includes cavities symmetrically opened inside the upper base and the lower base and a sliding column fixed inside the cavity; the sliding sleeve on the sliding column is provided with an L-shaped clamping plate that is driven to move by a button and extends to the outside of the cavity; the side walls on the opposite side of the upper support plate and the lower support plate are provided with L-shaped clamping grooves that are adapted to the L-shaped clamping plate.

[0011] A further improvement is that a limit spring movably mounted on the sliding column is connected between the inner wall of the cavity away from the button and the L-shaped card plate, and a push rod connected between the L-shaped card plate and the button is slidably passed through both side walls of the upper base and the lower base.

[0012] Further improvements are: the quick-release clamping mechanism includes empty slots symmetrically opened inside the upper base and the lower base and a sliding rod symmetrically fixed inside the empty slot; the sliding sleeve on the sliding rod is provided with an L-shaped clamping block extending to the outside of the empty slot; the side walls on the opposite side of the upper support plate and the lower support plate are provided with L-shaped clamping holes adapted to the L-shaped clamping block; both side walls of the upper base and the lower base are threaded with a one-way screw rod driven to rotate by the turning handle and rotatably connected to the L-shaped clamping block.

[0013] A construction method for a limit device of a seismic isolation bearing comprises the following steps:

[0014] Step 1: The upper support plate is pre-fixed to the bottom of the upper support beam of the building with anchor bolts. The four sets of upper bases are detachably installed on the front, back, left and right sides of the bottom of the upper support plate through the quick-release clamping mechanism;

[0015] Step 2: The lower support plate is pre-fixed to the top of the lower support beam of the building with anchor bolts. The four sets of lower bases are detachably installed on the front, back, left, and right sides of the top of the lower support plate through the quick-release clamping mechanism, so that the limit tube is between the two sets of semicircular baffles;

[0016] Step 3: Then use the spacing adjustment mechanism to drive the support block to drive the semicircular baffle to move, so as to adjust the distance between the semicircular baffle and the limiting tube, thus completing the construction and installation of the limiting device of the seismic isolation bearing.

[0017] The beneficial effects of the present invention are as follows: the upper base can be detachably installed at the bottom end of the upper support plate through a quick-release clamping mechanism, and the lower base can be detachably installed at the bottom end of the lower support plate through a quick-release clamping mechanism, so that the limiting tube below the upper support plate is between the two groups of semicircular baffles and is limited, so that the limiting device of the seismic isolation support can realize the limitation of the seismic isolation support at the same time, and is convenient for convenient disassembly and assembly, and is convenient for disassembly and replacement after damage, without the need to replace the support as a whole, which reduces the construction cost and period to a certain extent, and is conducive to post-earthquake repair, and the spacing adjustment mechanism in the dynamic adjustment box drives the two groups of support blocks at the top to drive the two groups of semicircular baffles to move toward or in opposite directions, so that the spacing between the semicircular baffles and the limiting tube is convenient for dynamic adjustment, and the maximum displacement threshold of the limit can be adjusted according to the seismic isolation requirements. It has high applicability and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 1 is a front view of the limiting device of the seismic isolation support according to the first embodiment of the present invention;

[0019] Figure 2 is a front cross-sectional view of the upper base and the lower base of the first embodiment of the present invention;

[0020] Figure 3 is a front cross-sectional view of the lower base and the dynamic adjustment box of the first embodiment of the present invention;

[0021] Figure 4 2 is a front cross-sectional view of a limiting device of a seismic isolation support according to a first embodiment of the present invention;

[0022] Figure 5 is a top view of the lower support plate of embodiment 1 of the present invention;

[0023] Figure 6 It is a front cross-sectional view of the lower base of the second embodiment of the present invention.

[0024] Among them: 1. Upper support plate; 2. Lower support plate; 3. Upper base; 4. Lower base; 5. Shear bolt; 6. Limit tube; 7. Dynamic adjustment box; 8. Support block; 9. Semicircular baffle; 10. Anchor bolt hole; 11. Strain gauge sensor; 12. Bolt connection hole; 13. Knob; 14. Bidirectional screw; 15. Threaded block; 16. Connecting block; 17. Cavity; 18. Sliding column; 19. Button; 20. L-shaped clamping plate; 21. L-shaped slot; 22. Limit spring; 23. Push rod; 24. Empty slot; 25. Sliding rod; 26. L-shaped clamping block; 27. L-shaped clamping hole; 28. Turning handle; 29. ​​One-way screw. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] Seismic isolation bearings are seismic isolation devices installed between the superstructure and foundation of a building or bridge. Through special structural design, they achieve a soft connection with the ground. They can extend the natural vibration period of the structure, increase damping, absorb and dissipate seismic energy, and thus reduce the impact of earthquakes on the structure.

[0027] Seismic isolation bearings are widely used in bridges, buildings, airports, hospitals, schools, high-rise residential buildings, urban rail transit bridges and ancient building protection. By installing seismic isolation bearings at key locations, the impact of earthquakes on the structure can be effectively reduced and the seismic resistance can be improved.

[0028] The limit device of the seismic isolation bearing is used to limit the displacement of the bearing under normal and frequent earthquake conditions to prevent excessive movement from causing structural damage. When the seismic force exceeds the set value, the limit device shears and destroys, and the bearing plays its seismic isolation function to protect the safety of the structure.

[0029] Example 1

[0030] according to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5As shown, the present embodiment provides a limiting device and construction method for a seismic isolation bearing, comprising an upper supporting plate 1 fixedly connected to the bottom end of the upper supporting beam of the building and a lower supporting plate 2 fixedly connected to the top end of the lower supporting beam of the building, a seismic isolation component is connected between the upper supporting plate 1 and the lower supporting plate 2 and together constitute a complete seismic isolation bearing, the front, back, left and right four sides of the bottom end of the upper supporting plate 1 are all installed with an upper base 3 through a quick-release clamping mechanism, the front, back, left and right four sides of the top end of the lower supporting plate 2 are all installed with a lower base 4 corresponding to the position of the upper base 3 through a quick-release clamping mechanism, the upper base 3 can be detachably installed at the bottom end of the upper supporting plate 1 through the quick-release clamping mechanism, and the lower base 4 can be detachably installed at the bottom end of the lower supporting plate 2 through the quick-release clamping mechanism, so that the limiting device of the seismic isolation bearing is convenient for convenient disassembly and assembly, and is convenient for disassembly and replacement after damage occurs;

[0031] The bottom end of the upper base 3 is provided with a hollow limit tube 6, and the upper base 3 and the limit tube 6 are fixedly connected by a shear bolt 5. The shear bolt 5 can withstand a certain degree of seismic force. The seismic force beyond its bearing range causes it to break. A hollow dynamic adjustment box 7 is welded and fixed to the top of the lower base 4. The dynamic adjustment boxes 7 on the front and rear sides are arranged horizontally, and the dynamic adjustment boxes 7 on the left and right sides are arranged longitudinally. Two groups of support blocks 8 are symmetrically provided on the top of the dynamic adjustment box 7, and the two groups of support blocks 8 are driven by a spacing adjustment mechanism and move in opposite directions. The top of the support block 8 A semicircular baffle 9 adapted to the position of the limiting tube 6 is welded and fixed, and the two groups of support blocks 8 and the semicircular baffle 9 at the top of the front and rear two groups of dynamic adjustment boxes 7 are symmetrically distributed on the periphery of the limiting tube 6, playing a role of lateral limiting. The two groups of support blocks 8 and the semicircular baffle 9 at the top of the left and right two groups of dynamic adjustment boxes 7 are symmetrically distributed front and back on the periphery of the limiting tube 6, playing a role of longitudinal limiting. The spacing adjustment mechanism in the dynamic adjustment box 7 drives the two groups of support blocks 8 at its top to drive the two groups of semicircular baffles 9 to move toward or in opposite directions, so that the spacing between the semicircular baffle 9 and the limiting tube 6 is easy to dynamically adjust.

[0032] Anchor bolt holes 10 are provided at the four corners of the upper support plate 1 and the lower support plate 2 so that the seismic isolation support can be anchored and fixed to the building support beam. A strain gauge sensor 11 corresponding to the position of the limit tube 6 is embedded and fixed on the inner side of the semicircular baffle 9, which is used to detect the force applied to the semicircular baffle 9 during the displacement of the limit tube 6. The strain gauge sensor 11 is wirelessly connected to the control device on the user end, which is convenient for the user to monitor the stress state of the semicircular baffle 9 in real time.

[0033] The bottom end of the limiting tube 6 is open, and a bolt connection hole 12 is provided at the bottom end of the upper base 3, and the bolt connection hole 12 is adapted to the shear bolt 5. The shear bolt 5 extends from the bottom end of the limiting tube 6, and after the thread passes through the top end of the limiting tube 6, it is threadedly connected to the bolt connection hole 12, thereby realizing a fixed connection between the limiting tube 6 and the upper base 3.

[0034] The spacing adjustment mechanism includes a knob 13, a bidirectional screw rod 14 and a threaded block 15, wherein the bidirectional screw rod 14 is rotatably connected to the inside of the dynamic adjustment box 7 through a bearing and is driven to rotate by the knob 13. There are two groups of threaded blocks 15, and the two groups of threaded blocks 15 are respectively threadedly sleeved on both sides of the bidirectional screw rod 14 and the threaded connection directions are opposite. A connecting block 16 is fixed between the threaded block 15 and the support block 8, and the connecting block 16 slides through the top of the dynamic adjustment box 7. A through groove adapted to the connecting block 16 is provided at the top of the dynamic adjustment box 7 to supply air sliding. By rotating the knob 13, the bidirectional screw rod 14 is driven to rotate forward or reverse, so that the threaded blocks 15 threadedly sleeved on both sides of the bidirectional screw rod 14 are displaced toward or in opposite directions. During the displacement of the threaded block 15, the support block 8 is driven to displace synchronously through the connecting block 16.

[0035] The quick-release clamping mechanism includes a cavity 17 and a slide post 18, wherein the cavity 17 is provided with two groups and is symmetrically opened inside the upper base 3 and the lower base 4, and the slide post 18 is fixed inside the cavity 17. An L-shaped card plate 20 is provided on the slide post 18 for sliding. The L-shaped card plate 20 slides through the outside of the cavity 17 and is driven to move by the button 19. An L-shaped card groove 21 is provided on the side wall of the upper support plate 1 and the lower support plate 2 on the opposite side, and the L-shaped card groove 21 is adapted to the L-shaped card plate 20. A limiting spring 22 is connected between the inner wall of the cavity 17 away from the button 19 and the L-shaped card plate 20, and the limiting spring 22 is movably sleeved on the slide post 18, which is an L-shaped card plate 20 provides elastic ejection force, and push rods 23 are slidingly passed through the two side walls of the upper base 3 and the lower base 4, and the push rods 23 are connected between the L-shaped card plate 20 and the button 19. Pressing the button 19 can drive the L-shaped card plate 20 to retract, and releasing the button 19 can reset the L-shaped card plate 20. By pressing the button 19, the two groups of L-shaped card plates 20 are displaced toward each other and retracted, and then the L-shaped card plates 20 are inserted into the L-shaped slots 21, and then the button 19 is released to make the two groups of L-shaped card plates 20 rebound and reset, and be snapped into the L-shaped slots 21, thereby realizing the detachable installation between the upper base 3 and the upper support plate 1 and the detachable installation between the lower base 4 and the lower support plate 2.

[0036] This embodiment also provides a construction method for a limit device of a seismic isolation bearing, comprising the following steps:

[0037] Step 1: Fix the upper support plate 1 to the bottom of the upper support beam of the building with anchor bolts through the anchor bolt holes 10 opened at the four corners of the upper support plate 1, and detachably install the four sets of upper bases 3 at the front, back, left and right sides of the bottom of the upper support plate 1 through the quick-release clamping mechanism, and fix the limit tube 6 to the bottom of the upper base 3 with the shear bolts 5;

[0038] Step 2: Fix the lower support plate 2 to the top of the lower support beam of the building with anchor bolts through the anchor bolt holes 10 opened at the four corners of the upper and lower support plates 2. Use the quick-release clamping mechanism to detachably install the four sets of lower bases 4 at the front, back, left and right sides of the top of the lower support plate 2, and place the limiting tube 6 between the two sets of semicircular baffles 9 to limit the position of the limiting tube 6.

[0039] Step three: Then, according to the actual limiting needs, use the spacing adjustment mechanism to drive the support block 8 to drive the semicircular baffle 9 to move, so as to adjust the distance between the semicircular baffle 9 and the limiting tube 6. Under the action of external force, the limiting tube 6 performs relative micro-displacement within the range limited by the two groups of semicircular baffles 9, thus completing the construction and installation of the limiting device of the seismic isolation bearing.

[0040] When the limiting device of the seismic isolation bearing is actually used in construction:

[0041] Under normal use conditions, the seismic isolation bearing composed of the upper support plate 1, the lower support plate 2 and the seismic isolation assembly therebetween is in a stationary state, and the four groups of limiting tubes 6 below the upper support plate 1 are respectively limited and blocked by the semicircular baffles 9 on both sides thereof, and the left and right limiting tubes 6 respectively block the longitudinal movement of the left and right semicircular baffles 9 (playing a longitudinal limiting role on the upper support plate 1), and the front and rear limiting tubes 6 respectively block the lateral movement of the front and rear semicircular baffles 9 (playing a lateral limiting role on the upper support plate 1). Of course, due to the gap between the limiting tube 6 and the semicircular baffle 9 after mutual adaptation, the limiting tube 6 (the upper support plate 1 and the limiting tube 6 move differently) is not absolutely stationary, and the limiting tube 6 and the upper support plate 1 can be slightly displaced within a specified range under the action of external force;

[0042] Under the action of frequent earthquakes, the upper support plate 1 may produce a slight vibration (a slight movement relative to the lower support plate 2), but because the limit tube 6 is blocked by the semicircular baffle 9 and the seismic force under frequent earthquakes is not enough to destroy the shear bolts 5 between the limit tube 6 and the upper base 3, the limit tube 6 will hardly move;

[0043] Under the action of rare earthquakes, taking the longitudinal earthquake as an example, the longitudinal earthquake force is sufficient to destroy the shear bolts 5 between the limit tube 6 and the upper base 3. The two limit tubes 6 on the left and right sides are destroyed (the shear bolts 5 are broken) due to the impact on the semicircular baffle 9, and are thus abandoned. At this time, the upper support plate 1 has no obstruction in the longitudinal bridge upward direction and can move freely in the longitudinal direction, but the two limit tubes 6 on the front and rear sides will not be destroyed due to insufficient transverse seismic force (the shear bolts 5 are not broken), and the upper support plate 1 still cannot move in the transverse direction. If both the longitudinal and transverse seismic forces are large, the four shear bolts 5 will be sheared off, and the upper support plate 1 can move freely in the longitudinal and transverse directions at the same time, using its seismic isolation components to achieve a shock absorption effect.

[0044] Example 2

[0045] See also Figure 6 This embodiment provides a limiting device for a seismic isolation support, which differs from the first embodiment in that:

[0046] The quick-release clamping mechanism includes an empty slot 24 and a slide bar 25, wherein the empty slot 24 is symmetrically opened inside the upper base 3 and the lower base 4, and the slide bar 25 is symmetrically fixed inside the empty slot 24. An L-shaped clamping block 26 is slidably sleeved on the slide bar 25, and the L-shaped clamping block 26 passes through the outside of the empty slot 24. The side walls of the upper support plate 1 and the lower support plate 2 on the opposite side are both provided with an L-shaped clamping hole 27, and the L-shaped clamping hole 27 is adapted to the L-shaped clamping block 26. A one-way screw rod 29 is threaded through the side walls of the upper base 3 and the lower base 4. A turning handle 28 is fixed at one end of the one-way screw rod 29 located outside the empty slot 24, and a one-way screw rod 29 located inside the empty slot 24 is rotatably connected to the L-shaped clamping block 26 through a bearing. The one-way screw rod 29 is driven to rotate by turning the turning handle 28. During the rotation of the one-way screw rod 29, the L-shaped clamping block 26 is driven to move so that it can be clamped in the L-shaped clamping hole 27 after extending into the L-shaped clamping hole 27.

[0047] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A limiting device for a seismic isolation bearing, comprising an upper bearing plate (1) and a lower bearing plate (2), characterized in that: The upper base (3) and the lower base (4) are respectively installed at the front, rear, left and right positions of the side walls of the opposite side of the upper support plate (1) and the lower support plate (2) through a quick-release clamping mechanism. The bottom end of the upper base (3) is fixed with a limit tube (6) through a shear bolt (5). The top end of the lower base (4) is fixed with a dynamic adjustment box (7). The top end of the dynamic adjustment box (7) is symmetrically provided with support blocks (8) driven by a spacing adjustment mechanism. The two groups of support blocks (8) at the top ends of the front and rear groups of the dynamic adjustment boxes (7) are symmetrically distributed left and right. The two groups of support blocks (8) at the top ends of the left and right groups of the dynamic adjustment boxes (7) are symmetrically distributed front and back. The top ends of the support blocks (8) are fixed with a semicircular baffle (9) adapted to the limit tube (6).

2. The limiting device of the seismic isolation bearing according to claim 1, characterized in that: Anchor bolt holes (10) are provided at the four corners of the upper support plate (1) and the lower support plate (2), and a strain gauge sensor (11) is embedded and fixed on the inner side of the semicircular baffle (9), and the strain gauge sensor (11) is wirelessly connected to the control device at the user end.

3. The limiting device of the seismic isolation bearing according to claim 1 is characterized in that: The bottom end of the limiting tube (6) is open and the interior is hollow, and the bottom end of the upper base (3) is provided with a bolt connection hole (12) adapted to the shear bolt (5), and the shear bolt (5) is threadedly passed through the top end of the limiting tube (6) and is threadedly connected to the bolt connection hole (12).

4. The limiting device of the seismic isolation bearing according to claim 1 is characterized in that: The spacing adjustment mechanism comprises a bidirectional screw rod (14) rotatably connected to the inside of the dynamic adjustment box (7) and driven to rotate by a knob (13), and a threaded block (15) threadedly sleeved on both sides of the bidirectional screw rod (14), and a connecting block (16) slidingly penetrating the top end of the dynamic adjustment box (7) is fixed between the threaded block (15) and the support block (8).

5. The limiting device of the seismic isolation bearing according to claim 1 is characterized in that: The quick-release clamping mechanism comprises a cavity (17) symmetrically opened inside the upper base (3) and the lower base (4) and a slide column (18) fixed inside the cavity (17); an L-shaped clamping plate (20) is slidably sleeved on the slide column (18) and is driven to move by a button (19) and extends to the outside of the cavity (17); and L-shaped clamping grooves (21) adapted to the L-shaped clamping plate (20) are opened on the side walls on the opposite side of the upper support plate (1) and the lower support plate (2).

6. The limiting device of the seismic isolation bearing according to claim 5, characterized in that: A limit spring (22) movably mounted on the slide column (18) is connected between the inner wall of the cavity (17) away from the button (19) and the L-shaped card plate (20), and a push rod (23) connected between the L-shaped card plate (20) and the button (19) is slidably passed through both side walls of the upper base (3) and the lower base (4).

7. The limiting device of the seismic isolation bearing according to claim 1, characterized in that: The quick-release clamping mechanism comprises a hollow groove (24) symmetrically provided inside the upper base (3) and the lower base (4) and a slide rod (25) symmetrically fixed inside the hollow groove (24); an L-shaped clamping block (26) is slidably sleeved on the slide rod (25) and extends to the outside of the hollow groove (24); an L-shaped clamping hole (27) adapted to the L-shaped clamping block (26) is provided on the side walls of the upper support plate (1) and the lower support plate (2) on opposite sides; and a one-way screw rod (29) is threadedly passed through the side walls of the upper base (3) and the lower base (4) and is driven to rotate by a turning handle (28) and is rotationally connected to the L-shaped clamping block (26).

8. The construction method of the limit device of the seismic isolation bearing according to claim 1 is characterized in that: The following steps are involved: Step 1: The upper support plate (1) is pre-fixed to the bottom end of the upper support beam of the building by anchor bolts, and four sets of upper bases (3) are detachably mounted on the front, back, left, and right sides of the bottom end of the upper support plate (1) by a quick-release clamping mechanism; Step 2: The lower support plate (2) is pre-fixed to the top of the lower support beam of the building by anchor bolts, and the four sets of lower bases (4) are detachably mounted on the front, back, left, and right sides of the top of the lower support plate (2) by a quick-release clamping mechanism, so that the limiting tube (6) is located between the two sets of semicircular baffles (9); Step 3: Then, the spacing adjustment mechanism is used to drive the support block (8) to drive the semicircular baffle (9) to move, so as to adjust the distance between the semicircular baffle (9) and the limiting tube (6), thereby completing the construction and installation of the limiting device of the seismic isolation bearing.

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