Method for installing anti-seismic isolator in building main body mechanism

Abstract

The invention relates to the technical field of earthquake resistance of a building main body structure, in particular to a method for installing an anti-seismic isolator in a building main body mechanism, which is characterized in that the anti-seismic isolator is installed on a building foundation, and the anti-seismic isolator is stably connected with the building foundation by means of pre-embedded bolts, leveling screws, high-strength grouting materials and the like. The anti-seismic isolator comprises an upper connecting plate, a lower connecting plate, a lead core, a rubber layer and a steel plate structure, seismic energy is absorbed through the lead core, the rubber layer provides a low-damping seismic isolation effect, and therefore impact of an earthquake on an upper structure of a building is effectively reduced. The process is suitable for various building types, especially hospitals, schools, shelters and the like in high-intensity earthquake areas. Through the installation technology, deformation and damage of the building in an earthquake can be reduced, the anti-seismic performance of the building is remarkably improved, and the safety of the building in a strong earthquake is ensured. The construction method is simple, high in installation precision, remarkable in construction efficiency and suitable for aseismic design and construction of large-scale buildings.

Description

Technical Field

[0001] The invention relates to the technical field of earthquake resistance of building main structures, in particular to a method for installing an earthquake-resistant isolator in a building main structure. Background Art

[0002] In order to effectively ensure that the construction project does not collapse or suffer serious damage when encountering a strong earthquake, the vibration period of the main structure of the building itself is extended, thereby effectively reducing the damage caused by the earthquake and avoiding a large number of casualties. In the traditional earthquake-resistant design of buildings, the main method is to resist the large earthquake by improving the strength and deformation capacity of the building structure itself, and to design the detailed components to ensure the overall performance of the building structure. However, in a strong earthquake, a large area of ​​structural components will be damaged, and its earthquake resistance is often difficult to be effectively improved in essence. In order to further improve the earthquake resistance of construction projects, the seismic reduction and isolation technology of construction projects has also received more and more attention. The shock reduction and isolation technology of buildings refers to the use of shock reduction and isolation devices to separate the structure or components from the earthquake ground movement or support movement that may cause damage as much as possible, thereby reducing the seismic force and energy transmitted to the upper structure. At present, the commonly used shock reduction and isolation technologies are mostly used in bridge construction, and are less used in house construction projects. In order to meet the requirements of earthquake-resistant design of building structures and solve the damage of earthquakes to the main structure of buildings, the main structure of the present invention adopts the design and construction process of installing earthquake-resistant isolators to improve the overall earthquake resistance of the construction project. Summary of the invention

[0003] In view of the above problems existing in the prior art, the present invention is proposed.

[0004] Therefore, the problem to be solved by the present invention is that most building structures rely on their own strength and deformation capacity to resist large earthquakes, which cannot ensure the overall performance of the building structure. In a strong earthquake, large-area structural components may be damaged or casualties may occur.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a method for installing a seismic isolator in a main structure of a building, comprising: S1: casting a foundation raft slab and a lower foundation column of a seismic isolator (100) on a building foundation according to design requirements; S2: reserving holes on the upper part of the foundation column according to the plane size position of the embedded bolts of the seismic isolator; S3: connecting the seismic isolator to the foundation column through the embedded sleeve bolts, and adjusting the level through the leveling screw to ensure the accuracy of the plane position and elevation of the seismic isolator; S4: using high-strength grouting material to grout and fix the seismic isolator to the foundation column; S5: after the grouting strength reaches the design requirements, installing and casting the upper frame column and beam slab of the seismic isolator.

[0006] As a preferred solution of the method for installing the seismic isolator described in the present invention in the main structure of a building, the seismic isolator includes an upper connecting plate, a lower connecting plate, a lead core, and a rubber seismic isolation bearing, and the upper connecting plate and the lower connecting plate are respectively connected to the main body of the building and the foundation of the building.

[0007] As a preferred solution of the method for installing the seismic isolator in the main structure of a building according to the present invention, the diameter of the reserved hole is twice the diameter of the embedded bolt, and the depth is not less than 240 mm.

[0008] As a preferred solution of the method for installing the seismic isolator in the main structure of a building according to the present invention, the leveling screw used in the installation of the seismic isolator can accurately adjust the horizontality of the isolator to ensure that the plane error between the support and the foundation column is controlled within 2 mm.

[0009] As a preferred solution of the method for installing the seismic isolator in the main structure of a building according to the present invention, the high-strength grouting material is a high-strength grouting material, and its compressive strength is not less than 50 MPa.

[0010] As a preferred solution of the method for installing the seismic isolator in the main structure of a building according to the present invention, the gap height between the lower connecting plate and the foundation column is controlled between 25 and 40 mm, and is filled by formwork support and grouting.

[0011] As a preferred solution of the method for installing the seismic isolator in the main structure of a building according to the present invention, after the grouting is completed, the grouting area is covered with sack pieces or cotton cloth, and water is sprinkled regularly for maintenance, and the maintenance period is not less than 7 days.

[0012] As a preferred solution of the method for installing the seismic isolator in the main structure of a building according to the present invention, before the reinforcement of the upper frame column of the seismic isolator is tied, a polytetrafluoroethylene slide plate is laid as an isolation layer.

[0013] As a preferred solution of the method for installing the seismic isolator in the main structure of a building according to the present invention, the seismic isolator can provide a low-damping seismic isolation effect through the built-in lead core and the steel plate rubber layer.

[0014] As a preferred solution of the method for installing the seismic isolator described in the present invention in the main structure of a building, the upper connecting plate and the lower connecting plate are provided with anchor bolt sleeves and inner bolts, which are firmly connected to the main structure of the building and the foundation through the anchor bolt sleeves and the inner bolts to form an overall seismic isolation system.

[0015] The beneficial effects of the present invention are as follows: the present invention adopts a combined building structure seismic isolator, the upper connecting plate and the building are integrated, the lower connecting plate, the base plate and the building foundation are integrated, and the entire support of the building has a strong tensile effect; and the building structure seismic isolator of the present invention has low damping and good seismic isolation effect. When a strong earthquake occurs, the displacement that can be generated is large, and the seismic isolation layer of the support will not be destroyed by excessive displacement, and the seismic isolation layer of the support has a good protective function; in addition, the present invention is simple to install and has high construction efficiency. It can reduce the response of the structure in the earthquake in strong earthquake areas, reduce the risk of structural deformation, damage and destruction. It can make the building structure in an elastic working state under strong earthquakes, greatly improving the building's ability to resist destruction in earthquakes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0017] Figure 1 It is a process flow chart of the present invention.

[0018] Figure 2 It is a structural diagram of the seismic isolator of the present invention.

[0019] Figure 3 A diagram of reserved holes for sleeve bolts of foundation columns of the seismic isolator of the present invention.

[0020] Figure 4 This is a hoisting diagram of the seismic isolator of the present invention.

[0021] Figure 5 This is a structural diagram of the second support unit of the present invention.

[0022] Figure 6 This is a positioning and leveling diagram for the seismic isolator of the present invention.

[0023] Figure 7 This is a diagram for setting up the grouting template for the bottom support of the seismic isolator of the present invention.

[0024] Figure 8 This is a diagram of grouting and fixing of the seismic isolator of the present invention.

[0025] Fig. 9 Complete the cover maintenance diagram for the grouting of the seismic isolator of the present invention.

[0026] Fig.10 This is a diagram of the reinforcement of the upper short columns and beams of the seismic isolator of the present invention. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is mutually exclusive with other embodiments, either individually or selectively.

[0030] Example 1

[0031] Reference Figure 1 , which is the first embodiment of the present invention, and the embodiment provides a method for installing a seismic isolator in a main structure of a building. The method for installing a seismic isolator in a main structure of a building includes S1: casting a foundation raft and a lower foundation column of the seismic isolator 100 on the building foundation according to the design requirements; S2: reserving holes on the upper part of the foundation column according to the plane size position of the embedded bolts of the seismic isolator; S3: connecting the seismic isolator to the foundation column through the embedded sleeve bolts, and adjusting the level through the leveling screw to ensure that the plane position and elevation of the seismic isolator are accurate; S4: using high-strength grouting material to grout and fix the seismic isolator and the foundation column; S5: after the grouting strength reaches the design requirements, installing and casting the upper frame column and beam slab of the seismic isolator;

[0032] The thickness of the foundation raft in this embodiment is 450mm, the local design deepening of the lower position of the column foundation is 350mm, and the plane size is 2.8m×2.8m; the cross-sectional size of the foundation column is designed to be 1.2m×1.2m, the seismic fortification intensity is eight degrees, and the seismic resistance level is two.

[0033] The key to this solution is the secure connection between the seismic isolator 100 and the building foundation. The foundation raft and foundation columns are designed according to seismic standards to ensure that they do not deform too much when bearing loads and seismic forces. The location and depth of the embedded bolts ensure a secure mechanical connection between the seismic isolator and the building foundation, thereby effectively improving the building's seismic resistance.

[0034] Example 2

[0035] Reference Figure 2 to Figure 10, which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0036] Specifically, the seismic isolator 100 includes an upper connecting plate 101, a lower connecting plate 102, a lead core 103, and a rubber seismic isolation support 104. The upper connecting plate 101 and the lower connecting plate 102 are respectively connected to the building body and the building foundation, and have a good tensile resistance effect;

[0037] The upper connecting plate 101 and the lower connecting plate 102 are fixed to the upper building structure and the building foundation structure respectively, and the middle rubber seismic isolation bearing 104 is fixed below the upper connecting plate 101 .

[0038] Preferably, a sliding plate 105 is fixed below the rubber seismic isolation support 104, and a fixing plate 106 is provided above the lower connecting plate 102;

[0039] When an earthquake occurs, the sliding plate 105 can slide along the upper surface of the fixed plate 106 fixed on the lower connecting plate 102. It is worth noting that the sliding plate 105 is made of polytetrafluoroethylene, and the fixed plate 106 is made of mirrored fiberglass. The coefficient of motion friction between the relative surfaces of the sliding plate 105 and the fixed plate 106 is not less than 0.15; the lead core 103 is mainly used to increase the vertical stiffness and reduce the vertical stiffness of the rubber isolation bearing 104, which can better meet the requirements of vertical bearing capacity. At the same time, the horizontal stiffness of the rubber isolation bearing 104 and the lead core is relatively large, which can prevent the bearing from excessive deformation during normal use.

[0040] Specifically, the diameter of the reserved hole is twice the diameter of the embedded bolt, and the depth is not less than 240 mm to ensure a stable connection between the seismic isolator and the foundation column;

[0041] The diameter and depth of the holes are designed based on the force requirements of the seismic isolator. The larger diameter ensures that there is enough space for grouting after the bolts are installed, while the depth design can increase the embedding force of the bolts to avoid falling off or loosening during an earthquake.

[0042] Specifically, the leveling screw used in the installation process of the seismic isolator can accurately adjust the horizontality of the isolator to ensure that the plane error between the support and the foundation column is controlled within 2 mm;

[0043] The horizontality of the seismic isolator directly affects its seismic isolation effect and the safety of the entire building. A 2mm plane error can ensure that the seismic isolator is evenly stressed during an earthquake and avoid stress concentration. In addition, precise leveling can also reduce uneven deformation caused by building settlement or other factors in subsequent use.

[0044] Specifically, the high-strength grouting material is a high-strength grouting material, and its compressive strength is not less than 50MPa; the strength of the grouting material directly affects the connection quality between the seismic isolator and the foundation column. The 50MPa high-strength grouting material can prevent cracking and falling off when subjected to seismic loads, ensuring that the grouting layer has sufficient strength and durability to cope with the load transfer requirements during a major earthquake. The grouting material used in this embodiment adopts TB / T 2331-2020 products. The initial setting time of the grouting material should be ≥30 minutes, and the final setting time should be ≤180 minutes. The 2-hour compressive strength should be ≥20MPa, the 24-hour compressive strength should be ≥40MPa, and the 28-day compressive strength should be ≥50MPa.

[0045] Specifically, the gap height between the lower connecting plate 102 and the foundation column is controlled between 25 and 40 mm and is filled by formwork support and grouting;

[0046] The height of the gap between the bearing bottom plate and the concrete surface of the base is controlled between 25mm and 40mm. In order to ensure that the vibration isolation bearing can play its role effectively and avoid affecting its vibration isolation effect due to excessive or small gaps, finally tighten the bolts on the lower connecting plate.

[0047] Specifically, when performing S4, a vibration chain is installed at the bottom of the base of the seismic isolator 100, and a template is supported around the base of the seismic isolator. The template support height is determined according to the grouting of the support. High-strength mortar or high-strength grouting material is poured, and the grouting thickness is controlled between 25mm and 40mm. The vibration chain vibrates at the same time to ensure that there is no air under the support and the filling is dense.

[0048] Specifically, after grouting is completed, use sacks or cotton cloth to cover the grouting area and sprinkle water regularly for maintenance, and the maintenance period is not less than 7 days;

[0049] The strength of the grouting material gradually increases with the curing time. According to the "Engineering Construction Quality Acceptance Standard (TB10752-2018)", the curing time after grouting of the seismic isolator support should be no less than 3 days, and 7 days of curing time can ensure that the strength of the grouting material meets the design requirements. The moist curing method can effectively prevent the grouting material from drying out early, thereby improving its final strength.

[0050] Specifically, before the reinforcement of the upper frame column of the seismic isolator 100 is tied, a polytetrafluoroethylene slide plate is laid as an isolation layer;

[0051] The polytetrafluoroethylene slide plate is used as the isolation layer mainly because it has excellent physical and chemical properties, which can significantly improve the vibration isolation effect and service life of the bearing, as well as its high temperature resistance, low temperature resistance, corrosion resistance and non-stickiness, ensuring that the seismic isolator can slide freely under strong earthquake conditions and reduce the transmission of seismic energy.

[0052] Specifically, the seismic isolator 100 can provide a low-damping seismic isolation effect through the built-in lead core 103 and the steel plate rubber layer 105;

[0053] The low damping design of the seismic isolator enables it to effectively absorb energy and generate displacement during an earthquake, reducing the transmission of seismic force. This design not only improves the seismic isolation capacity of the seismic isolator, but also prevents damage to the seismic isolation layer due to excessive displacement, thereby extending the service life of the building.

[0054] Specifically, the upper connecting plate 101 and the lower connecting plate 102 are provided with anchor bolt sleeves 107 and inner bolts 108, and are firmly connected to the building body and the foundation through the anchor bolt sleeves 107 and the inner bolts 108 to form an integral seismic isolation system;

[0055] The anchor bolt sleeve 107 and the inner bolt 108 in this embodiment are made of corrosion-resistant carbon steel. The seismic isolator is firmly fixed between the building foundation and the main body through the anchor bolts to form a complete seismic isolation system. The design and installation of the anchor bolts can ensure that when an earthquake occurs, the seismic isolator can transfer the vibration energy to the seismic isolation layer, effectively reduce the vibration response of the building, and protect the safety of the structure.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for installing a seismic isolator in a main structure of a building, characterized in that: include, Casting the foundation raft slab and the lower foundation column of the seismic isolator (100) on the building foundation according to the design requirements; Holes are reserved on the upper part of the foundation column according to the plane size of the embedded bolts of the seismic isolator; Connect the seismic isolator to the foundation column through the embedded sleeve bolts, and adjust the level through the leveling screw to ensure the plane position and elevation of the seismic isolator are accurate; Use high-strength grouting materials to grout and fix the seismic isolators to the foundation columns; After the grouting strength reaches the design requirements, the upper frame columns and beams of the seismic isolator will be installed and poured.

2. The method for installing a seismic isolator in a main structure of a building according to claim 1, characterized in that: The seismic isolator (100) comprises an upper connecting plate (101), a lower connecting plate (102), a lead core (103), and a rubber seismic isolation support (104); the upper connecting plate (101) and the lower connecting plate (102) are respectively connected to a building body and a building foundation; A sliding plate (105) is fixed below the rubber shock-isolating support (104), and a fixing plate (106) is arranged above the lower connecting plate (102).

3. The method for installing a seismic isolator in a main structure of a building according to claim 2, characterized in that: The diameter of the reserved hole is twice the diameter of the embedded bolt, and the depth is not less than 240 mm.

4. The method for installing a seismic isolator in a main structure of a building according to claim 3, characterized in that: The leveling screw used in the installation process of the seismic isolator can accurately adjust the horizontality of the isolator to ensure that the plane error between the support and the foundation column is controlled within 2 mm.

5. The method for installing a seismic isolator in a main structure of a building according to claim 4, characterized in that: The high-strength grouting material is a high-strength grouting material, and its compressive strength is not less than 50MPa.

6. The method for installing a seismic isolator in a main structure of a building according to claim 5, characterized in that: The height of the gap between the lower connecting plate (102) and the foundation column is controlled to be between 25 and 40 mm, and is filled by formwork support and grouting.

7. The method for installing a seismic isolator in a main structure of a building according to claim 6, characterized in that: After the grouting is completed, cover the grouting area with sack pieces or cotton cloth and sprinkle water regularly for maintenance. The curing period should be no less than 7 days.

8. The method for installing a seismic isolator in a main structure of a building according to claim 7, characterized in that: Before the reinforcement of the upper frame column of the earthquake-resistant isolator (100) is tied, a polytetrafluoroethylene sliding plate is laid as an isolation layer.

9. The method for installing a seismic isolator in a main structure of a building according to claim 8, characterized in that: The anti-seismic isolator (100) can provide a low-damping seismic isolation effect through the built-in lead core (103) and the steel plate rubber layer (105).

10. The method for installing a seismic isolator in a main structure of a building according to claim 9, characterized in that: The upper connecting plate (101) and the lower connecting plate (102) are provided with anchor bolt sleeves (107) and inner bolts (108), and are firmly connected to the building body and the foundation through the anchor bolt sleeves (107) and the inner bolts (108), so as to form an integral seismic isolation system.

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