CN117513390A - Seismic isolation structure on strip foundation of existing building - Google Patents

Abstract

The invention relates to the technical field of building engineering vibration isolation, discloses a vibration isolation structure of an existing building strip foundation, and solves the technical problems that the existing vibration isolation structure is not tightly connected with a building per se and the vibration isolation effect is insufficient, and the vibration isolation structure comprises the building foundation, a vibration isolation layer and the strip building; the strip-shaped building can be a viaduct pier, the shock insulation layer is positioned on the upper surface of the building foundation, and the strip-shaped building is positioned on the upper surface of the shock insulation layer; the vibration isolation layer comprises an X-direction vibration isolation block, a Y-direction vibration isolation block and a Z-direction upright post, wherein the X-direction vibration isolation block and the Y-direction vibration isolation block are both arranged as strip-shaped vibration isolation blocks, the Z-direction upright post is arranged as a strip-shaped upright post, and the bottom end of the Z-direction upright post is matched and spliced into the building foundation. According to the technical scheme, the combined structure of the X-direction shock insulation blocks, the Y-direction shock insulation blocks and the Z-direction upright posts is utilized, the building foundation, the shock insulation layer and the strip-shaped building are integrated, and the connection compactness of the shock insulation structure and the building is improved.

Description

Seismic isolation structure on strip foundation of existing building

Technical field

The present invention relates to the technical field of earthquake isolation in construction engineering, and more specifically, it relates to an earthquake isolation structure on an existing building strip foundation.

Background technique

Building seismic isolation technology is a new type of shock absorption control technology developed in the past two or three decades that is suitable for my country's national conditions. It completely overcomes the shortcomings of the traditional "head-on" seismic design method for seismic structures. The approach of "softening the structure" and "conquering rigidity with softness" is used to avoid, limit and absorb the energy transmitted into the structure by setting up a building isolation layer at the bottom of the structure. Isolation means isolating earthquakes. The seismic isolation layer installed between the superstructure and the foundation of the building can isolate the transmission of seismic energy to the superstructure, reduce the seismic effect of the superstructure, meet the expected earthquake-proof requirements, and reliably guarantee the safety of the building.

Traditional seismic isolation structures solve the seismic isolation and anti-seismic problems of house buildings, but there is no good seismic isolation structure for strip buildings like viaduct piers. As shown in Figure 1, it includes a bridge pier 01 and a seismic isolation structure 02 at the bottom of the bridge pier 01. It can be seen from the existing technology that the traditional seismic isolation structure is not closely connected to the building itself, which affects the stability of the installation of the pier-type strip building and has insufficient seismic resistance.

Contents of the invention

In view of the technical problems proposed in the background art that the connection between the earthquake isolation structure and the building itself is not tight enough and the earthquake resistance effect is insufficient, the present invention uses a combined structure of X-direction isolation blocks, Y-direction isolation blocks and Z-direction columns, in which the X-direction isolation block The seismic blocks and Y-direction isolation blocks form a "ten"-shaped isolation layer to improve the seismic effect. The Z-direction columns integrate the building foundation, isolation layer and strip building into one, improving the tight connection between the isolation structure and the building itself. properties to solve the shortcomings of current earthquake-resistant structures.

In order to achieve the above objects, the present invention provides the following technical solutions:

The seismic isolation structure of the strip foundation of an existing building includes a building foundation, a seismic isolation layer and a strip building; the strip building can be a viaduct pier, the seismic isolation layer is located on the upper surface of the building foundation, and the A strip building is located on the upper surface of the isolation layer;

The isolation layer includes an X-direction isolation block, a Y-direction isolation block and a Z-direction column. The X-direction isolation block and Y-direction isolation block are both configured as strip-shaped isolation blocks. The Z-direction column is provided with It is a bar-shaped column; the X-direction isolation block and Y-direction isolation block cross each other and are arranged perpendicularly to each other. The Z-direction column is located at the intersection point and is respectively connected with the X-direction isolation block and Y-direction isolation block. The two shock blocks are arranged vertically;

The bottom end of the Z-direction column is fitted and plugged into the building foundation. The upper surface of the building foundation is provided with a first column installation opening. The top end of the Z-direction column is fitted and plugged into the strip-shaped building. The lower surface of the strip building is provided with a second column installation opening.

Through the above technical solution, the present invention utilizes the combined structure of X-direction isolation blocks, Y-direction isolation blocks and Z-direction columns, in which the X-direction isolation blocks and Y-direction isolation blocks form a "cross"-shaped isolation layer. To improve the seismic effect, Z-columns integrate the building foundation, isolation layer and strip building into one, improving the tightness of the connection between the isolation structure and the building itself to solve the shortcomings of the current seismic structure.

In addition, the structural design in which internal steel plates penetrate the Z-direction columns further improves the tightness of the connection between the isolation structure and the building itself. Therefore, the first invention of the present invention: the "ten"-shaped isolation layer structure; the second invention: the design of the internal steel plate penetrating column structure.

The present invention is further configured such that the midpoints of the X-direction isolation block and the Y-direction isolation block intersect with each other and are arranged perpendicularly to each other, and the midpoint of the Z-direction column is located at the intersection point and is respectively connected with the X-direction isolation block. Both the directional isolation block and the Y-direction isolation block are installed vertically.

Through the above technical solution, the structural design of the midpoint is maintained, making the left-right symmetrical structure more conducive to stable support of the strip building. The purpose is to improve installation stability.

The present invention is further configured such that the internal structures of the X-direction isolation block and the Y-direction isolation block are the same.

Through the above technical solution, since the application scenarios of the X-direction isolation block and the Y-direction isolation block are the same, the same structural design can be adopted.

The invention is further configured as follows: the specific structures of the X-direction isolation block and Y-direction isolation block include an upper connecting steel plate, a lower connecting steel plate, an upper sealing plate, a lower sealing plate, a lead plate, an internal steel plate, an internal rubber and a protective layer. rubber.

Through the above technical solution, the upper connecting steel plate and the lower connecting steel plate play a role in contacting and connecting with the building foundation and strip building on the upper and lower surfaces respectively; the lead plate plays a core supporting role; the internal steel plate and internal rubber are alternately arranged to make the interior have Buffering and damping effect; protective layer of rubber plays a protective and sealing role on the circumference.

The present invention is further configured such that: a collision groove is provided at the midline position of the bottom surface of the upper connecting steel plate, and the lead plate is located directly below the collision groove.

Through the above technical solution, since a certain buffer height is required, there is a certain gap between the top of the lead plate and the collision groove.

The present invention is further configured such that the inner steel plate is disposed through the Z-direction column.

Through the above technical solution, the internal steel plate extends out of the main body of the isolation block and is fixedly connected to the steel plate inside the Z-direction column to form an integrated steel plate penetration structure.

The present invention is further configured such that: the number of the X-direction isolation blocks is 1, the number of the Y-direction isolation blocks is 1 or more, the number of the Z-direction columns and the number of the Y-direction isolation blocks equal.

Through the above technical solution, when the length of the strip building is long, more than one Y-direction isolation block is required to ensure installation stability.

The present invention is further configured such that the number of X-direction isolation blocks is 1, the number of Y-direction isolation blocks is 2, and the number of Z-direction columns is 2.

Through the above technical solution, the number of Z-direction columns is equal to the number of Y-direction isolation blocks.

The present invention is further configured such that: the building foundation is a reinforced concrete structure or a rock layer structure, and the strip building is a reinforced concrete structure.

Through the above technical solution, the building foundation in the present invention is generally a reinforced concrete structure poured on site or a rock layer structure; while the strip building is located on the ground, such as the pier structure of a viaduct, which is generally a prefabricated reinforced concrete structure.

The present invention is further configured such that the Z-direction column is made of steel bars and concrete.

Through the above technical solution, Z-direction columns are generally prefabricated steel bars and concrete pouring structures.

To sum up, the present invention has the following beneficial effects:

(1) The present invention utilizes a combined structure of X-direction isolation blocks, Y-direction isolation blocks and Z-direction columns, in which the X-direction isolation blocks and Y-direction isolation blocks form a "ten"-shaped isolation layer to improve earthquake resistance. Effect;

(2) The present invention uses a combined structure of X-direction isolation blocks, Y-direction isolation blocks and Z-direction columns. The Z-direction columns integrate the building foundation, isolation layer and strip building into one, improving the isolation structure and The tightness of the connections within the building itself;

(3) The number of Y-direction isolation blocks and Z-direction columns in the present invention can be adjusted as the length of the strip building changes.

Description of drawings

Figure 1 is a reference schematic diagram of the background technology;

Figure 2 is a schematic structural diagram of the application scenario of the isolation layer of the present invention;

Figure 3 is a schematic diagram of the three-dimensional structure of the isolation layer of the present invention;

Figure 4 is a schematic diagram of the internal structure of the X-direction isolation block and the Y-direction isolation block in the isolation layer of the present invention;

Figure 5 is an enlarged structural diagram of position C in Figure 4;

Figure 6 is a schematic structural diagram of the isolation layer from above, showing the cross-sectional position of Figure 7;

Figure 7 is a schematic cross-sectional structural diagram along the A-A direction in Figure 6;

Figure 8 is an enlarged structural diagram of the position D in Figure 7.

Reference symbols: 01. Bridge pier; 02. Seismic isolation structure; 1. Building foundation; 1-1. First column installation opening; 2. Seismic isolation layer; 3. Strip building; 3-1. Second column installation opening ;4. 6. Internal steel plate; 4-7. Internal rubber; 4-8. Protective layer rubber; 4-9. Conflict groove; 5. Y-direction isolation block; 6. Z-direction column.

Detailed ways

The present invention will be further described in detail below with reference to the examples and drawings, but the implementation of the present invention is not limited thereto.

Example 1

The seismic isolation structure of the existing building strip foundation is shown in Figure 2, including building foundation 1, seismic isolation layer 2 and strip building 3. In this embodiment, the building foundation 1 is a reinforced concrete structure poured on site or a rock layer structure laid on site, and the strip building 3 is set as a viaduct pier, which is a reinforced concrete structure. The seismic isolation layer 2 is located on the upper surface of the building foundation 1, and the strip building 3 is located on the upper surface of the seismic isolation layer 2. The invention of the present invention lies in the design of the structure of the seismic isolation layer 2, and correspondingly changes the building foundation 1 and the strip building 3 Part of the structure is as follows.

As shown in Figures 3 to 5, the isolation layer 2 includes an X-direction isolation block 4, a Y-direction isolation block 5 and a Z-direction column 6. The X-direction isolation block 4 and the Y-direction isolation block 5 are both arranged as strips. shaped isolation block, the Z-direction column 6 is set as a strip column, and the Z-direction column 6 is made of steel bars and concrete. In this embodiment, the number of X-direction isolation blocks 4 is one, and the number of Y-direction isolation blocks 5 is The number is one, and the number of Z-direction columns 6 is one (combined with the structure shown in Figure 3 and excluding a group of Y-direction isolation blocks 5 and Z-direction columns 6). At this time, the midpoints of the X-direction isolation block 4 and the Y-direction isolation block 5 intersect with each other and are arranged perpendicularly to each other. The midpoint of the Z-direction column 6 is located at the intersection point and is connected to the X-direction isolation block 4 and 5 respectively. The Y-direction isolation blocks 5 are arranged vertically.

According to the vertical structural design of the Z-direction column 6, the bottom end of the Z-direction column 6 is plugged into the building foundation 1. The upper surface of the building foundation 1 is provided with a first column installation opening 1-1, and the top end of the Z-direction column 6 is plugged into the building foundation 1. Inside the strip building 3, a second column installation opening 3-1 is provided on the lower surface of the strip building 3.

Among them, since the X-direction isolation block 4 and the Y-direction isolation block 5 are used in this embodiment, the internal structures of the X-direction isolation block 4 and the Y-direction isolation block 5 are the same. As shown in Figure 4, the specific structures of the X-direction isolation block 4 and the Y-direction isolation block 5 include an upper connecting steel plate 4-1, a lower connecting steel plate 4-2, an upper sealing plate 4-3, and a lower sealing plate 4-4. , lead plate 4-5, internal steel plate 4-6, internal rubber 4-7 and protective layer rubber 4-8.

The lead plate 4-5 is in the shape of a plate, the inner steel plate 4-6 and the inner rubber 4-7 are alternately arranged on both sides of the lead plate 4-5, and the top and bottom of the inner steel plate 4-6 and the inner rubber 4-7 are respectively composed of The upper sealing plate 4-3 and the lower sealing plate 4-4 are sealed. The inner steel plate 4-6, the inner rubber 4-7, the upper sealing plate 4-3 and the lower sealing plate 4-4 are surrounded by a protective layer of rubber 4-4. 8 is sealed, and is fixed on the upper surface of the upper sealing plate 4-3 and the lower surface of the lower sealing plate 4-4 by the upper connecting steel plate 4-1 and the lower connecting steel plate 4-2, respectively. The function of the connecting steel plate 4-2 is to bolt to the external building foundation 1 and the strip building 3.

Since the internal steel plate 4-6 and the internal rubber 4-7 need a certain buffer space when playing a buffering and damping role, a friction groove 4-9 is provided at the center line of the bottom surface of the upper connecting steel plate 4-1, and the lead plate 4-9 5 is located directly below the collision groove 4-9, and there is a certain distance between the upper surface of the lead plate 4-5 and the bottom surface of the collision groove 4-9.

In addition, in order to improve the tightness of the connection between the X-direction isolation block 4, the Y-direction isolation block 5 and the Z-direction column 6, as shown in FIGS. 4-8, in the present invention, the inner steel plates 4-6 penetrate Z-axis column 6 is provided. That is, the internal steel plates 4-6 can extend out of the main body of the isolation block and be welded and fixedly connected to the steel plates provided inside the Z-direction column 6 to form an integrated steel plate penetration structure.

Example 2

The seismic isolation structure of the existing building strip foundation is shown in Figure 2, including building foundation 1, seismic isolation layer 2 and strip building 3. In this embodiment, the building foundation 1 is a reinforced concrete structure poured on site or a rock layer structure laid on site, and the strip building 3 is set as a viaduct pier, which is a reinforced concrete structure. The seismic isolation layer 2 is located on the upper surface of the building foundation 1, and the strip building 3 is located on the upper surface of the seismic isolation layer 2. The invention of the present invention lies in the design of the structure of the seismic isolation layer 2, and correspondingly changes the building foundation 1 and the strip building 3 Part of the structure is as follows.

As shown in Figures 3 to 5, the isolation layer 2 includes an X-direction isolation block 4, a Y-direction isolation block 5 and a Z-direction column 6. The X-direction isolation block 4 and the Y-direction isolation block 5 are both arranged as strips. shaped isolation block, the Z-direction column 6 is set as a strip column, and the Z-direction column 6 is made of steel bars and concrete. In this embodiment, the number of X-direction isolation blocks 4 is one, and the number of Y-direction isolation blocks 5 is The number is two, and the number of Z-direction columns 6 is two (as shown in Figures 2 and 3). The one-third point of the X-direction isolation block 4 intersects with the midpoint of the Y-direction isolation block 5 and they are arranged perpendicularly to each other. The midpoint of the Z-direction column 6 is located at the intersection point and is respectively connected with the X-direction isolation block. 4. The Y-direction isolation blocks 5 are arranged vertically.

According to the vertical structural design of the Z-direction column 6, the bottom end of the Z-direction column 6 is plugged into the building foundation 1. The upper surface of the building foundation 1 is provided with a first column installation opening 1-1, and the top end of the Z-direction column 6 is plugged into the building foundation 1. Inside the strip building 3, a second column installation opening 3-1 is provided on the lower surface of the strip building 3.

Among them, since the X-direction isolation block 4 and the Y-direction isolation block 5 are used in this embodiment, the internal structures of the X-direction isolation block 4 and the Y-direction isolation block 5 are the same. As shown in Figure 4, the specific structures of the X-direction isolation block 4 and the Y-direction isolation block 5 include an upper connecting steel plate 4-1, a lower connecting steel plate 4-2, an upper sealing plate 4-3, and a lower sealing plate 4-4. , lead plate 4-5, internal steel plate 4-6, internal rubber 4-7 and protective layer rubber 4-8.

The lead plate 4-5 is in the shape of a plate, the inner steel plate 4-6 and the inner rubber 4-7 are alternately arranged on both sides of the lead plate 4-5, and the top and bottom of the inner steel plate 4-6 and the inner rubber 4-7 are respectively composed of The upper sealing plate 4-3 and the lower sealing plate 4-4 are sealed. The inner steel plate 4-6, the inner rubber 4-7, the upper sealing plate 4-3 and the lower sealing plate 4-4 are surrounded by a protective layer of rubber 4-4. 8 is sealed, and is fixed on the upper surface of the upper sealing plate 4-3 and the lower surface of the lower sealing plate 4-4 by the upper connecting steel plate 4-1 and the lower connecting steel plate 4-2, respectively. The function of the connecting steel plate 4-2 is to bolt to the external building foundation 1 and the strip building 3.

Since the internal steel plate 4-6 and the internal rubber 4-7 need a certain buffer space when playing a buffering and damping role, a friction groove 4-9 is provided at the center line of the bottom surface of the upper connecting steel plate 4-1, and the lead plate 4-9 5 is located directly below the collision groove 4-9, and there is a certain distance between the upper surface of the lead plate 4-5 and the bottom surface of the collision groove 4-9.

In addition, in order to improve the tightness of the connection between the X-direction isolation block 4, the Y-direction isolation block 5 and the Z-direction column 6, as shown in FIGS. 4-8, in the present invention, the inner steel plates 4-6 penetrate Z-axis column 6 is provided. That is, the internal steel plates 4-6 can extend out of the main body of the isolation block and be welded and fixedly connected to the steel plates provided inside the Z-direction column 6 to form an integrated steel plate penetration structure.

The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above-mentioned embodiments. All technical solutions that fall under the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and modifications may be made without departing from the principles of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (10)

1. The earthquake-proof structure of the existing building strip-shaped foundation comprises a building foundation (1), an earthquake-proof layer (2) and a strip-shaped building (3); the strip-shaped building (3) can be a viaduct pier, the shock insulation layer (2) is located on the upper surface of the building foundation (1), and the strip-shaped building (3) is located on the upper surface of the shock insulation layer (2), and is characterized in that:

the vibration isolation layer (2) comprises an X-direction vibration isolation block (4), a Y-direction vibration isolation block (5) and a Z-direction upright post (6), wherein the X-direction vibration isolation block (4) and the Y-direction vibration isolation block (5) are both arranged as strip-shaped vibration isolation blocks, and the Z-direction upright post (6) is arranged as a strip-shaped upright post; the X-direction shock insulation blocks (4) and the Y-direction shock insulation blocks (5) are mutually intersected and are mutually perpendicular, and the Z-direction upright posts (6) are positioned at the intersection points and are respectively perpendicular to the X-direction shock insulation blocks (4) and the Y-direction shock insulation blocks (5);

z is to peg graft to in stand (6) bottom cooperation is in building foundation (1), building foundation (1) upper surface is provided with first stand mounting mouth (1-1), Z is to stand (6) top cooperation peg graft to in bar building (3), bar building (3) lower surface is provided with second stand mounting mouth (3-1).

2. The shock insulation structure on existing building strip foundation according to claim 1, wherein: the middle points of the X-direction shock insulation blocks (4) and the Y-direction shock insulation blocks (5) are mutually intersected and are mutually perpendicular, and the middle points of the Z-direction upright posts (6) are located at the crossing points and are respectively perpendicular to the X-direction shock insulation blocks (4) and the Y-direction shock insulation blocks (5).

3. The shock insulation structure on existing building strip foundation according to claim 1, wherein: the X-direction shock insulation block (4) and the Y-direction shock insulation block (5) have the same internal structure.

4. A seismic isolation structure on an existing building strip foundation according to claim 3, wherein: the concrete structure of the X-direction shock insulation block (4) and the Y-direction shock insulation block (5) comprises an upper connecting steel plate (4-1), a lower connecting steel plate (4-2), an upper sealing plate (4-3), a lower sealing plate (4-4), a lead plate (4-5), an inner steel plate (4-6), an inner rubber (4-7) and a protective layer rubber (4-8).

5. The shock insulation structure on existing building strip foundation according to claim 4, wherein: an abutting groove (4-9) is formed in the middle line position of the bottom surface of the upper connecting steel plate (4-1), and the lead plate (4-5) is located right below the abutting groove (4-9).

6. The shock insulation structure on existing building strip foundation according to claim 5, wherein: the inner steel plates (4-6) penetrate through the Z-direction upright posts (6).

7. The shock insulation structure on existing building strip foundation according to claim 1, wherein: the number of the X-direction shock insulation blocks (4) is 1, the number of the Y-direction shock insulation blocks (5) is 1 or more than 1, and the number of the Z-direction upright posts (6) is equal to the number of the Y-direction shock insulation blocks (5).

8. The shock insulation structure on an existing building strip foundation according to claim 7, wherein: the number of the X-direction shock insulation blocks (4) is 1, the number of the Y-direction shock insulation blocks (5) is 2, and the number of the Z-direction upright posts (6) is 2.

9. The shock insulation structure on existing building strip foundation according to claim 1, wherein: the building foundation (1) is of a reinforced concrete structure or a rock layer structure, and the strip-shaped building (3) is of a reinforced concrete structure.

10. The shock insulation structure on existing building strip foundation according to claim 1, wherein: the Z-direction upright post (6) is formed by pouring reinforced steel bars and concrete.