Isolated foundation

Abstract

This invention provides a seismic isolation foundation, comprising a vertically stacked seismic isolation mechanism and a friction energy dissipation mechanism; the vertically stacked seismic isolation mechanism is arranged below the upper structure to be supported and vertically supports the upper structure to be supported; a reaction wall is provided on the outer periphery of the upper structure to be supported, and the friction energy dissipation mechanism is disposed on the reaction wall; the friction energy dissipation mechanism includes a fixed component and a movable support component, the movable support component frictionally engaging with the fixed component along the horizontal relative displacement direction between the upper structure to be supported and the reaction wall; wherein, the distance between the end of the movable support component away from the reaction wall and the outer periphery of the upper structure to be supported is not greater than the limit displacement of the vertically stacked seismic isolation mechanism.

Description

Technical Field

[0001] This invention relates to the field of seismic resistance technology for engineering structures, specifically to a seismic isolation foundation. Background Technology

[0002] Earthquakes are highly destructive and sudden natural disasters, and base isolation technology is the core approach to reducing the seismic response of the superstructure. Currently, layered periodic isolation foundations are widely used in engineering. These foundations, formed by vertically alternating layers of rigid and elastic materials, utilize local resonance mechanisms to attenuate seismic waves within a gap range. Simultaneously, inter-layer slippage further weakens the upward-transmitted seismic forces, effectively reducing the seismic response of the superstructure.

[0003] However, this type of seismic isolation foundation has clear application limitations: seismic motion in the near fault region has a significant low-frequency pulse effect. This type of low-frequency component usually cannot be covered by the attenuation domain of the existing periodic seismic isolation foundation. Instead, it will be amplified after being transmitted through the foundation, causing the seismic isolation foundation to generate horizontal displacement far exceeding the design threshold, which will eventually lead to damage or even instability of the superstructure.

[0004] Based on this, the inventors of this application propose a seismic isolation foundation in order to solve the aforementioned technical problems. Summary of the Invention

[0005] The present invention solves the above-mentioned technical problems through the following technical solution: This invention provides a seismic isolation foundation, comprising: a vertically stacked seismic isolation mechanism and a friction energy dissipation mechanism; The vertically stacked seismic isolation mechanism is arranged below the upper structure to be supported and supports the upper structure to be supported vertically. The outer periphery of the upper structure to be supported is provided with a reaction wall, and the friction energy dissipation mechanism is located on the reaction wall; The friction energy dissipation mechanism includes a fixed component and a movable support component. The movable support component engages with the fixed component in a frictional movement along the horizontal relative displacement direction between the upper structure to be supported and the reaction wall. The distance between the end of the movable support component away from the reaction wall and the outer periphery of the upper structure to be supported is not greater than the limit displacement of the vertical stacked seismic isolation mechanism.

[0006] According to one embodiment of the present invention, the friction energy dissipation mechanism includes a plurality of energy dissipation units, which are evenly distributed around the outer circumference of the upper structure to be supported.

[0007] According to one embodiment of the present invention, each of the energy-consuming units includes one of the fixed components and one of the movable support components; When the movable support component slides relative to the fixed component, at least one side of them makes frictional contact.

[0008] According to an embodiment of the present invention, the fixing component includes a first plate and a second plate arranged vertically stacked, with a cavity formed between the first plate and the second plate, and a first groove formed between the first plate and the second plate along the horizontal relative displacement direction between the upper structure to be supported and the reaction wall. The movable support assembly includes a support head, a mounting plate, and friction bolts. The mounting plate has a second groove along the horizontal relative displacement direction between the upper structure to be supported and the reaction wall. One end of the mounting plate passes through the cavity, and the friction bolt passes vertically through the first and second sliding grooves. The two ends of the friction bolt are respectively pressed and fitted to the outer end faces of the first and second plates by locking nuts.

[0009] According to one embodiment of the present invention, a friction layer is coated on the opposite two ends of the mounting plate along the vertical direction, and the friction layer is in close contact with the inner end faces of the first plate and the second plate facing the cavity.

[0010] According to one embodiment of the present invention, the support head includes a side plate and an elastic anti-collision damping layer disposed on the side plate, wherein the elastic anti-collision damping layer is disposed at one end of the side plate near the upper structure to be supported.

[0011] According to one embodiment of the present invention, one end of the elastic anti-collision damping layer is adhered to the side plate.

[0012] According to one embodiment of the present invention, the first plate and the second plate are fastened together vertically by a plurality of threaded connectors; Multiple threaded connectors are evenly arranged around the outer periphery of the groove.

[0013] According to one embodiment of the present invention, the vertically stacked seismic isolation mechanism includes at least two concrete layers and at least two elastic layers, wherein the concrete layers and the elastic layers are arranged in a vertically staggered manner.

[0014] According to one embodiment of the present invention, the elastic layer is a rubber layer.

[0015] The positive and progressive effects of this invention are as follows: This invention relates to a seismic isolation foundation. Through the vertical support of a vertically stacked seismic isolation mechanism, it can utilize the local resonance effect to attenuate seismic waves within the gap range, effectively reducing the seismic response of the superstructure under conventional earthquake loading. Simultaneously, in conjunction with a friction energy dissipation mechanism installed on the reaction wall, the frictional movement of the movable support component and the fixed component along the horizontal relative displacement direction allows the mechanical energy generated during the sliding process between the movable and fixed components to dissipate heat when the vertically stacked seismic isolation mechanism undergoes significant horizontal displacement due to near-fault low-frequency pulse earthquakes, causing the superstructure to come into contact with the movable support component. This prevents the direct transfer of seismic energy to the superstructure. Furthermore, the distance between the end of the movable support component away from the reaction wall and the outer perimeter of the superstructure is no greater than the ultimate displacement of the vertically stacked seismic isolation mechanism. This triggers a limiting effect before the seismic isolation mechanism reaches its failure threshold, fundamentally preventing structural instability caused by excessive displacement of the seismic isolation mechanism. Attached Figure Description

[0016] The above and other features, properties and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, wherein: Figure 1 This is a cross-sectional view of the seismic isolation foundation of the present invention at one angle; Figure 2 for Figure 1 A magnified schematic diagram of the friction energy dissipation mechanism; Figure 3 for Figure 2 A top view of the friction energy dissipation mechanism; Figure 4 This is a top view of the seismic isolation foundation of the present invention.

[0017] 1. Vertical stacked seismic isolation mechanism; 11. Concrete layer; 12. Elastic layer; 2. Friction-based energy dissipation mechanism; 21. Fixing components; 211. First end; 212. First plate; 213. Second plate; 214. Cavity; 215. First chute; 216. Threaded fasteners; 217. The second end; 22. Activity support components; 221. Support the head; 222. Mounting plate; 223. Friction bolt; 224. Second chute; 225. Lock nut; 226. Friction layer; 227. Side panels; 228. Elastic anti-collision damping layer; 23. Energy-consuming unit; 3. The upper structure to be supported; 4. Reaction wall. Detailed Implementation

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0019] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not specifically singular and may include plural forms. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0020] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0021] The widely used layered periodic isolation foundations mainly rely on local resonance mechanisms to attenuate seismic waves within the gap range. However, earthquakes near fault zones exhibit significant low-frequency pulse effects. These low-frequency components cannot be covered by the attenuation domain of existing periodic isolation foundations. Instead, they are amplified by the foundation and amplified, causing the isolation foundation to generate horizontal displacements far exceeding the design threshold, which in turn leads to damage or even instability of the superstructure.

[0022] To address the problem of excessive horizontal displacement of existing layered periodic isolation foundations under near-fault pulse-type ground motion, this application refers to... Figure 1 A seismic isolation foundation is proposed, specifically comprising a vertically stacked seismic isolation mechanism 1 and a friction energy dissipation mechanism 2.

[0023] The vertically stacked seismic isolation mechanism 1 is installed below the upper structure 3 to be supported and supports it vertically. It is used to attenuate seismic waves within the band gap range through local resonance effect. The bottom end of the upper structure 3 to be supported is integrally formed with the vertically stacked seismic isolation mechanism 1 by cast-in-place construction. Under seismic action, the vertical vibration energy of the upper structure 3 to be supported can be dissipated through the inter-layer deformation of the vertically stacked seismic isolation mechanism 1.

[0024] A reaction wall 4 is provided on the outer periphery of the superstructure 3 to be supported, and a friction energy dissipation mechanism 2 is fixedly installed on the side of the reaction wall 4 facing the superstructure 3 to be supported. Under seismic action, when the vertical stacked isolation mechanism 1 experiences inter-story displacement and generates a horizontal displacement exceeding a preset threshold, the outer periphery of the superstructure 3 to be supported contacts the end of the friction energy dissipation mechanism 2, transmitting the horizontal vibration force to the friction energy dissipation mechanism 2. Through frictional engagement, the mechanical energy of the horizontal vibration is converted into heat energy dissipation, realizing the dual functions of seismic energy consumption and displacement limiting.

[0025] Specifically, the friction energy dissipation mechanism 2 includes a fixed component 21 and a movable support component 22. The movable support component 22 is in frictional cooperation with the fixed component 21 along the horizontal relative displacement direction between the upper structure 3 to be supported and the reaction wall 4.

[0026] Under earthquake action, when the vertical stacked isolation mechanism 1 undergoes inter-story displacement, causing the upper structure 3 to be supported to come into contact with the movable support component 22, the movable support component 22 will generate sliding friction relative to the fixed component 21, converting the mechanical energy of horizontal vibration into heat energy dissipation, thereby consuming earthquake energy.

[0027] Furthermore, the distance between the end of the active support component 22 away from the reaction wall 4 and the outer periphery of the upper structure 3 to be supported is not greater than the limit displacement of the vertical stacked seismic isolation mechanism 1. This allows the limiting action to be triggered before the vertical stacked seismic isolation mechanism 1 reaches the failure threshold, thereby preventing structural instability caused by excessive displacement from the root cause.

[0028] The friction energy dissipation mechanism 2 can stably dissipate energy when the supporting superstructure 3 undergoes large displacement under the action of low-frequency pulse earthquakes near the fault, thus preventing the low-frequency earthquake energy that has not been attenuated by the vertical stacked isolation mechanism 1 from being directly transmitted to the supporting superstructure 3, achieving the dual protection effect of conventional earthquake damping and large displacement limiting energy dissipation.

[0029] Please refer to Figure 1 and Figure 4The friction energy dissipation mechanism 2 includes multiple energy dissipation units 23, which are evenly distributed around the outer periphery of the upper structure 3 to be supported.

[0030] exist Figure 4 In the embodiment shown, the reaction wall 4 is generally square and is arranged around the outer periphery of the upper structure 3 to be supported. Each side of the reaction wall 4 is provided with 4 energy dissipation units 23.

[0031] It should be noted that, Figure 4 The shape of the reaction wall 4 and the number of energy-consuming units 23 corresponding to each side shown are only illustrative examples. The shape of the reaction wall 4 can also be set as a polygon according to the outer contour of the upper structure 3 to be supported. The number of energy-consuming units 23 corresponding to each side can also be 1, 2 or more, which is not limited here.

[0032] By evenly distributing multiple energy dissipation units 23 around the circumference of the upper structure 3 to be supported, the corresponding energy dissipation units 23 can quickly respond and participate in energy dissipation and limiting when the upper structure 3 to be supported is displaced in any horizontal direction. This avoids damage to the upper structure 3 to be supported due to uneven force on one side, thereby improving the overall stress rationality and seismic reliability of the seismic isolation foundation.

[0033] Optionally, each energy-consuming unit 23 includes a fixed component 21 and a movable support component 22; when the movable support component 22 slides relative to the fixed component 21, at least one side is in frictional contact.

[0034] The above structure allows each energy-consuming unit 23 to independently perform its energy-consuming function. Damage to a single energy-consuming unit 23 does not affect the normal operation of the remaining energy-consuming units 23, thereby improving the overall redundancy and reliability of the friction energy-consuming mechanism 2. At the same time, the friction contact surface ensures that the energy of the movable support component 22 can be stably dissipated during sliding, avoiding energy-consuming failure caused by frictionless sliding.

[0035] Specifically, please refer to Figure 2 and Figure 3The fixed component 21 includes a first plate 212 and a second plate 213 stacked vertically. A cavity 214 is formed between the first plate 212 and the second plate 213. The first plate 212 and the second plate 213 are provided with a first groove 215 along the horizontal relative displacement direction between the upper structure 3 to be supported and the reaction wall 4. The movable support component 22 includes a support head 221, a mounting plate 222 and a friction bolt 223. The mounting plate 222 is provided with a second groove 224 along the horizontal relative displacement direction between the upper structure 3 to be supported and the reaction wall 4. One end of the mounting plate 222 passes through the cavity 214. The friction bolt 223 passes through the first groove 215 and the second groove 224 vertically. The two ends of the friction bolt 223 are pressed and attached to the outer end faces of the first plate 212 and the second plate 213 by locking nuts 225.

[0036] like Figure 2 As shown, the first plate 212 and the second plate 213 have a first end 211 and a second end 217. The first end 211 of the first plate 212 and the second plate 213 is integrally formed with the reaction wall. The second end 217 of the first plate 212 and the second plate 213 extends toward the direction of the upper structure 3 to be supported. Moreover, the first plate 212 and the second plate 213 are arranged vertically in a staggered manner, and the thickness of the mounting plate 222 corresponds to the vertical dimension of the cavity 214.

[0037] Under seismic loading, when the vertically stacked isolation mechanisms 1 shift and generate significant horizontal displacement, the upper structure 3 to be supported comes into contact with the support head 221 of the movable support assembly 22, transmitting the horizontal force to the support head 221 and the mounting plate 222. This drives the mounting plate 222 to slide within the cavity 214 along the horizontal relative displacement direction. During the sliding process, the mounting plate 222 rubs against the inner walls of the first plate 212 and the second plate 213, converting sliding mechanical energy into heat energy to dissipate seismic energy, thereby ensuring the safety of the upper structure 3 to be supported.

[0038] like Figure 3 As shown, the first slide groove 215 and the second slide groove 224 extend in the same length direction. When the friction bolt 223 slides along the first slide groove 215 and the second slide groove 224, the first slide groove 215 and the second slide groove 224 can guide and drive the mounting plate 222 to move in a fixed direction, thereby avoiding the support head 221 from shifting itself when subjected to the force of the upper structure 3 to be supported, which would lead to the failure of force transmission.

[0039] Please continue to refer to Figure 2 The mounting plate 222 has a friction layer 226 coated on its two opposite vertical ends. The friction layer 226 is in close contact with the inner end faces of the first plate 212 and the second plate 213 facing the cavity 214.

[0040] By setting the friction layer 226, the mounting plate 222 can be tightly abutted against the inner end faces of the first plate 212 and the second plate 213. This increases the frictional contact area of ​​the mounting plate 222 and the first plate 212 and the second plate 213 during sliding, thereby improving the energy dissipation efficiency per unit displacement. Furthermore, the energy dissipation parameters can be quickly adjusted by replacing the friction layer 226 with different friction coefficients without altering the overall structure, significantly improving the engineering adaptability of the seismic isolation foundation of this application and reducing subsequent maintenance costs.

[0041] Optionally, the support head 221 includes a side plate 227 and an elastic anti-collision damping layer 228 disposed on the side plate 227. The elastic anti-collision damping layer 228 is disposed at one end of the side plate 227 near the upper structure 3 to be supported.

[0042] An elastic anti-collision damping layer 228 is provided on the side plate 227, which can buffer the impact when it comes into contact with the upper structure 3 to be supported and the support head 221, avoiding local damage to the outer peripheral surface of the upper structure 3 to be supported due to rigid contact. At the same time, the elastic anti-collision damping layer 228 can also consume some impact energy, further improving the overall energy consumption capacity of the friction energy dissipation mechanism 2 and optimizing the smoothness of the force distribution at the moment of limit triggering of the movable support component 22.

[0043] In one embodiment, one end of the elastic anti-collision damping layer 228 is adhered to the side plate 227.

[0044] The elastic anti-collision damping layer 228 is connected to the side plate 227 by adhesive bonding, which can not only ensure the reliability of the connection between the elastic anti-collision damping layer 228 and the side plate 227, avoiding the damping layer from falling off and failing under long-term reciprocating impact; but also eliminates the need for additional fasteners, simplifying the assembly process of the support head 221, and the elastic anti-collision damping layer 228 can be directly removed and replaced after wear, further reducing the difficulty of operation and maintenance.

[0045] Please continue to refer to Figure 2 and Figure 3 The first plate 212 and the second plate 213 are fastened together vertically by a plurality of threaded connectors 216; the plurality of threaded connectors 216 are evenly arranged around the outer periphery of the slide groove 211.

[0046] The first plate 212 and the second plate 213 are fastened together by the threaded connector 216, which ensures that the clamping force of the first plate 212 and the second plate 213 on the mounting plate 222 is evenly distributed. This avoids the problem of virtual friction caused by the local warping and deformation of the first plate 212 or the second plate 213 when the mounting plate 222 is rubbing and sliding relative to the first plate 212 and the second plate 213, thus ensuring the effectiveness of force transmission and energy consumption stability.

[0047] Please refer to Figure 1For the vertically stacked seismic isolation mechanism 1, the vertically stacked seismic isolation mechanism 1 includes at least two concrete layers 11 and at least two elastic layers 12, and the concrete layers 11 and elastic layers 12 are arranged in a vertically staggered manner.

[0048] The concrete layer 11 is used to ensure the vertical bearing capacity of the vertically stacked seismic isolation mechanism 1 and meet the load support requirements of the upper structure 3 to be supported. The deformation capacity of the elastic layer 12 can realize the attenuation of seismic waves and the energy dissipation of inter-story faulting.

[0049] By staggering the concrete layer 11 and the elastic layer 12 vertically, a stable periodic bandgap characteristic can be formed, which can attenuate seismic waves of specific frequency bands, thereby greatly improving the adaptability of the seismic isolation foundation to different seismic spectrum characteristics.

[0050] Thus, the seismic isolation foundation proposed in this application has at least the following advantages: First, relying on the periodic structural band gap characteristics of the vertical stacked seismic isolation mechanism 1, the seismic waves in the band gap coverage frequency band can be attenuated through the local resonance effect. At the same time, in conjunction with the inter-layer slippage dissipation of seismic energy by the concrete layer 11 and the elastic layer 12, the seismic response of the upper structure 3 to be supported under conventional seismic action is effectively reduced, the upward transmission of seismic action is weakened from the source, and the operational safety of the upper structure 3 to be supported is ensured.

[0051] Second, through the combined design of the friction energy dissipation mechanism 2, when the vertical stacked seismic isolation mechanism 1 generates a large horizontal displacement exceeding the preset threshold under the action of a near-fault low-frequency pulse earthquake, the upper structure 3 to be supported first contacts the elastic anti-collision damping layer 228 at the end of the movable support component 22 to buffer the impact, and then drives the mounting plate 222 to slide directionally along the cavity 214, so that the mounting plate 222 generates stable friction with the inner end faces of the first plate 212 and the second plate 213, converting the sliding mechanical energy into heat energy dissipation.

[0052] Meanwhile, this application relies on the design that the distance between the active support component 22 and the upper structure 3 to be supported is less than or equal to the limit displacement of the vertical stacked seismic isolation mechanism 1. Hard limiting is triggered before the vertical stacked seismic isolation mechanism 1 reaches the failure threshold, which fundamentally avoids structural instability caused by displacement exceeding the limit and realizes the dual functions of energy dissipation buffer and limiting protection.

[0053] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0054] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. In addition, although the terminology used in this application is selected from commonly known and used terms, some terms mentioned in this application's specification may have been chosen by the applicant according to his or her judgment, and their detailed meanings are explained in the relevant sections of this description. Moreover, this application should be understood not only through the actual terms used, but also through the meaning implied by each term.

[0055] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of scope in some embodiments of this application are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0056] Although this application has been described with reference to specific embodiments, those skilled in the art should recognize that the above embodiments are only used to illustrate this application, and various equivalent changes or substitutions can be made without departing from the spirit of this application. Therefore, any changes or modifications to the above embodiments within the essential spirit of this application will fall within the scope of the claims of this application.

Claims

1. A seismic isolation foundation, characterized in that, include: Vertically stacked seismic isolation mechanism and friction energy dissipation mechanism; The vertically stacked seismic isolation mechanism is arranged below the upper structure to be supported and supports the upper structure to be supported vertically. The outer periphery of the upper structure to be supported is provided with a reaction wall, and the friction energy dissipation mechanism is located on the reaction wall; The friction energy dissipation mechanism includes a fixed component and a movable support component. The movable support component engages with the fixed component in a frictional movement along the horizontal relative displacement direction between the upper structure to be supported and the reaction wall. The distance between the end of the movable support component away from the reaction wall and the outer periphery of the upper structure to be supported is not greater than the limit displacement of the vertical stacked seismic isolation mechanism.

2. The seismic isolation foundation according to claim 1, characterized in that, The friction energy dissipation mechanism includes multiple energy dissipation units, which are evenly distributed around the outer circumference of the upper structure to be supported.

3. The seismic isolation foundation according to claim 2, characterized in that, Each of the energy-consuming units includes one of the fixed components and one of the movable support components; When the movable support component slides relative to the fixed component, at least one side of them makes frictional contact.

4. The seismic isolation foundation according to claim 3, characterized in that, The fixing component includes a first plate and a second plate stacked vertically, with a cavity formed between the first plate and the second plate, and a first groove formed between the first plate and the second plate along the horizontal relative displacement direction between the upper structure to be supported and the reaction wall. The movable support assembly includes a support head, a mounting plate, and friction bolts. The mounting plate has a second groove along the horizontal relative displacement direction between the upper structure to be supported and the reaction wall. One end of the mounting plate passes through the cavity, and the friction bolt passes vertically through the first and second sliding grooves. The two ends of the friction bolt are respectively pressed and fitted to the outer end faces of the first and second plates by locking nuts.

5. The seismic isolation foundation according to claim 4, characterized in that, The mounting plate is coated with a friction layer on its opposite vertical end faces, and the friction layer is in close contact with the inner end faces of the first plate and the second plate facing the cavity.

6. The seismic isolation foundation according to claim 4, characterized in that, The support head includes a side plate and an elastic anti-collision damping layer disposed on the side plate, wherein the elastic anti-collision damping layer is disposed at one end of the side plate near the upper structure to be supported.

7. The seismic isolation foundation according to claim 6, characterized in that, One end of the elastic anti-collision damping layer is adhered to the side plate.

8. The seismic isolation foundation according to claim 4, characterized in that, The first plate and the second plate are fastened together vertically by a plurality of threaded connectors; Multiple threaded connectors are evenly arranged around the outer periphery of the groove.

9. The seismic isolation foundation according to claim 1, characterized in that, The vertically stacked seismic isolation mechanism includes at least two concrete layers and at least two elastic layers, which are arranged in a vertically staggered manner.

10. The seismic isolation foundation according to claim 9, characterized in that, The elastic layer is a rubber layer.

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