CN108678416B - Assembled underground storey-adding vibration-isolating structure and storey-adding vibration-isolating construction process - Google Patents

Abstract

The invention discloses an assembled underground storey-adding shock insulation structure, which is characterized in that: including building bottom post, building bottom post lower extreme is connected with the sleeve, it is connected with the shock insulation module to go up the sleeve lower extreme, the shock insulation module lower extreme is connected with the layer-increasing prefab, the layer-increasing prefab includes prefabricated layer-increasing post and cup joints at layer-increasing post upper end and the lower sleeve of being connected with the shock insulation module, the shock insulation module includes with last telescopic connection's last mounting panel, with lower telescopic connection's lower mounting panel and connects the shock insulation pad between last mounting panel and lower mounting panel. According to the invention, the vibration isolation module and the storey-adding prefabricated member are arranged on the original building bottom layer column, and the vibration isolation module and the storey-adding prefabricated member are prefabricated in a factory by measuring the size of the building bottom layer column, so that compared with the construction and the construction on a construction site, the mode not only effectively reduces the construction difficulty, but also reduces the construction period.

Description

A prefabricated underground layer-added earthquake isolation structure and layer-added earthquake isolation construction technology

Technical field

The invention relates to the field of construction engineering, and in particular to a prefabricated underground layer-added earthquake isolation structure and an layer-added earthquake isolation construction technology.

Background technique

Adding floors or transforming existing buildings and rationally developing and utilizing urban space resources are one of the important ways to achieve sustainable development. However, most of the existing reinforced concrete structures are designed based on the old version of the "Code for Seismic Design of Building Structures". Due to factors such as insufficient understanding of building seismic design and outdated seismic design concepts, the seismic safety of building structures is low and cannot meet the requirements of the new version of "Code for Seismic Design of Building Structures". Seismic requirements of the "Seismic Design Code" (GB50011-2010). Therefore, in the reconstruction of existing buildings by adding underground floors, in order to make the existing buildings meet the seismic fortification requirements of the new era, it is often necessary to carry out seismic reinforcement of the overall structure. However, existing seismic reinforcement methods for overall structures, such as enlarging the cross-section method, adding additional components, bonding steel reinforcement methods, planting rebar anchoring methods, etc., all have shortcomings such as long reinforcement periods, increased building weight, and damage to original components. The shortcomings of the above-mentioned seismic reinforcement methods will greatly increase the difficulty of underground layer-adding reconstruction and affect the quality of underground layer-adding reconstruction. First of all, the self-weight of the superstructure has increased significantly, which places high requirements on the bearing capacity of the additional support columns in the basement, which greatly increases the difficulty of construction and the overall cost. Secondly, the enlarged cross-section method uses cast-in-situ reinforced concrete, which has low early strength and is easy to During the maintenance phase, serious safety problems such as cracking and tilting of houses occurred due to insufficient structural bearing capacity; finally, the renovation of existing buildings to add floors requires the relocation of original residents, businesses, etc., and the above-mentioned seismic reinforcement further increases the time for adding floors. Increased placement costs to a great extent. Therefore, how to reduce the reinforcement time, not increase the self-weight of the superstructure, and simplify the reinforcement process has become the focus of the research and development of underground earthquake isolation reinforcement.

Contents of the invention

The purpose of the present invention is to solve the problems of long construction period and high construction difficulty in existing buildings during the construction of additional layers of earthquake isolation. It provides a prefabricated underground additional layer of earthquake isolation structure and an additional layer of earthquake isolation construction technology that can effectively Shorten the construction period and reduce the difficulty of construction.

The object of the present invention is achieved through the following technical solution: a prefabricated underground layer-added earthquake isolation structure, which is characterized in that: it includes a bottom floor column of a building, an upper sleeve is connected to the lower end of the bottom floor column of the building, and the lower end of the upper sleeve A seismic isolation module is connected, and the lower end of the seismic isolation module is connected to a layer-increasing prefabricated part. The layer-increasing prefabricated part includes a prefabricated layer-increasing column and a lower sleeve sleeved on the upper end of the layer-increasing column and connected to the earthquake isolation module. The seismic isolation module includes an upper mounting plate connected to the upper sleeve, a lower mounting plate connected to the lower sleeve, and a seismic isolation pad connected between the upper mounting plate and the lower mounting plate.

The upper sleeve installed at the lower end of the bottom floor column of the building plays a connecting role and is used to connect the isolation module installed at the lower end of the upper sleeve. The seismic isolation module plays a role of seismic isolation, which can effectively reduce the damage caused by external vibrations to the building and improve the seismic performance of the building. The layer-increasing prefabricated parts are used to extend the length of the bottom floor columns of the building, thereby expanding the lower space of the original building and achieving the purpose of developing the underground space of the original building. The seismic isolation modules and layer-added prefabricated parts are pre-manufactured in the factory. The manufactured seismic isolation modules and layer-added prefabricated parts only need to be assembled at the construction site. Compared with the existing construction methods, this method will not only effectively reduce It reduces the difficulty of construction and greatly reduces the construction period.

Preferably, a fine sand concrete pouring layer is provided between the upper sleeve and the bottom floor column of the building, and a fine sand concrete pouring layer is provided between the lower sleeve and the layer-increasing column. The fine sand concrete pouring layer is used to fill the gaps between the upper sleeve and the bottom floor column of the building, the lower sleeve and the additional layer column, and at the same time improve the firmness of the connection.

Preferably, the upper sleeve is provided with a first bolt hole connected to the upper mounting plate, the lower sleeve is provided with a second bolt hole connected to the lower mounting plate, and the upper mounting plate is provided with a first bolt hole connected to the upper mounting plate. There are third bolt holes with the same number and corresponding positions as the first bolt holes, and fourth bolt holes with the same number and corresponding positions as the second bolt holes are provided on the lower mounting plate.

Preferably, several first internal connection holes are provided on the bottom side of the bottom floor column of the building, and the upper sleeve is provided with the same number of first external connection holes as the first internal connection holes and corresponding positions, and the third external connection holes are provided on the upper sleeve. A first bolt is connected to an inner connecting hole and a first outer connecting hole corresponding to the first inner connecting hole, and a first cushion layer for strengthening the connection is provided between the first bolt and the first inner connecting hole. The first cushion layer is made of rubber material. By setting the first cushion layer between the bolt and the first inner connection hole, the first cushion layer expands and is tightly connected to the inside of the first inner connection hole through the action of the first bolt. The contact solves the problem that the first bolt and the first inner connecting hole cannot be tightly engaged, and increases the connection strength of the bolt.

Preferably, a plurality of second internal connection holes are provided on the side of the end of the layer-increasing column, and the lower sleeve is provided with the same number of second external connection holes as the second internal connection holes and the positions correspond to each other, and the A second bolt is connected to the second inner connecting hole and the second outer connecting hole corresponding to the second inner connecting hole, and a second cushion layer for strengthening the connection is provided between the second bolt and the second inner connecting hole. . The second cushion layer is made of rubber material. By setting the second cushion layer between the bolt and the second inner connection hole, the second cushion layer expands and is tightly connected to the inside of the second inner connection hole through the action of the second bolt. The contact solves the problem that the second bolt cannot engage tightly with the second inner connecting hole, and increases the connection strength of the bolt.

Preferably, the upper sleeve is provided with several first through holes for pouring concrete, and the lower sleeve is provided with second through holes for pouring concrete. The first through hole and the second through hole are used for pouring concrete, and also serve as ventilation holes. When pouring concrete, internal air is discharged so that the concrete can be evenly distributed.

A layer-added earthquake isolation construction technology using the prefabricated underground layer-added earthquake isolation structure described in any one of claims 1 to 6, characterized in that it includes the following steps:

1. Measure the dimensions of the bottom floor columns of the building and determine the splicing position;

2. Make prefabricated parts: According to the measured data mentioned in step 1, make the floor-added columns, upper sleeves, lower sleeves and earthquake isolation modules that match the building's bottom columns, and assemble the lower sleeve and the floor-added columns. into layer-added prefabricated parts;

3. Install the sleeve on the lower end of the bottom floor column of the building;

4. Install the isolation module;

5. Install layer-added prefabricated parts;

6. Fireproof the surface of the exposed steel sleeve.

In step 1, the reasonable splicing position is determined by pre-measurement of the dimensions of the bottom-floor columns of the building. At the same time, the size measurement of the bottom-floor columns of the building provides a dimensional basis for the production of prefabricated parts. In step 2, the prefabricated parts are manufactured in the factory. Compared with the original construction and manufacturing method at the construction site, manufacturing in the factory can provide a good manufacturing environment, which can effectively reduce the difficulty of manufacturing, save production time, and have higher manufacturing accuracy. . In step 3, a sleeve is installed at the bottom of the building, and the upper sleeve is connected to the prefabricated column of the additional layer. Compared with the original method, the concrete part of the bottom column of the building is removed and the top steel bar is cut out, and the column is lengthened by welding. The construction method is to add column steel bars and then formwork and pour concrete. This connection method is not only low in difficulty and short in work hours, but also causes little damage to the original bottom-floor columns of the building. In step 4, pre-manufactured seismic isolation modules are installed so that the building has good seismic resistance. In step 5, the prefabricated parts for adding layers are prefabricated. During operation, you only need to assemble the prefabricated parts for adding layers directly to the lower end of the isolation module. Compared with the original method of removing the concrete part of the bottom column of the building and cutting out the top steel bars. , the construction method is to lengthen the column steel bars by welding, and then formwork and pour concrete. This connection method is not only low difficulty, short work time, but also causes little damage to the original bottom-level columns of the building.

As a preferred method, in step 3, first drill the first internal connection hole on the bottom floor column of the building, chisel the bottom of the bottom floor column of the building, and align the first external connection holes on the upper sleeve with the corresponding first internal connection holes. hole, install the first cushion layer in the first inner connecting hole, and install the first bolt. Finally, pour fine sand concrete between the bottom column of the building and the upper sleeve through the first through hole provided on the upper sleeve. layer.

As a preference, when drilling the first internal connection hole on the bottom floor column of the building, avoid the steel bars on the bottom floor column of the building. The diameter of the first internal connection hole is 3~5 mm larger than the diameter of the first bolt. Clean the hole after drilling. Operation.

Preferably, in step 4, when installing the seismic isolation module, fix the upper mounting plate to the lower end of the upper sleeve through bolts. In step 5, when installing the layer-added prefabricated parts, build temporary supports to support the layer-added prefabricated parts and set them below The second bolt holes on the sleeve are respectively aligned with the fourth bolt holes provided on the lower mounting plate, and are fixed through bolt connections. At the same time, the foundation is poured to fix the bottom of the additional layer column on the foundation. When the foundation is firmly formed, the temporary support is removed.

The beneficial effects of the present invention are: in the present invention, the seismic isolation module and the prefabricated layer-added components are installed on the original bottom-floor columns of the building. The seismic-isolation modules and the prefabricated layer-added components are prefabricated in the factory by measuring the dimensions of the bottom-floor columns of the building. , compared with construction at the construction site, this method not only effectively reduces the difficulty of construction, but also reduces the construction period.

Description of the drawings

Figure 1 is a schematic structural diagram of the present invention.

Figure 2 is an enlarged structural view of part I in Figure 1.

Figure 3 is a cross-sectional view along the direction A in Figure 1 .

Figure 4 is a schematic diagram of the upper sleeve structure.

Figure 5 is a schematic diagram of the structure of the lower sleeve.

Figure 6 is an exploded view of the isolation module structure.

Figure 7 is a cross-sectional view of the isolation module.

Figure 8 is an enlarged structural view of part II in Figure 7.

In the picture: 1. Bottom floor column of the building, 2. Upper sleeve, 3. Fine sand concrete pouring layer, 4. First bolt, 5. First cushion, 6. Upper mounting plate, 7. Seismic isolation pad, 8. Lower mounting plate, 9. Lower sleeve, 10. Second bolt, 11. Second cushion, 12. Increasing layer column, 13. First external connection hole, 14. First through hole, 15. First bolt hole , 16. Second bolt hole, 17. Second through hole, 18. Second external connection hole, 19. Fixing screw, 20. Third bolt hole, 21. Lead core, 22. Upper sealing plate, 23. Lower sealing Plate, 24. Fourth bolt hole, 25. Rubber layer, 26. Steel sheet, 27. Protective layer.

Detailed ways

The present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings.

As shown in Figures 1 to 8, a prefabricated underground layer-added earthquake isolation structure includes a building bottom column 1. In this embodiment, the horizontal surface of the building's ground floor column 1 is rectangular. The lower end of the bottom floor column 1 of the building (according to the upper and lower position relationship in Figure 1) is connected with an upper sleeve 2 that matches the bottom floor column of the building. The upper sleeve 2 is sleeved on the bottom of the bottom floor column 1 of the building. The upper sleeve 2 has a cylindrical structure with a rectangular cross-section. The upper end of the upper sleeve 2 is open. A first external connection hole 13 is provided on the side of the upper sleeve 2 . The number of the first connecting holes 13 can be set according to the specific dimensions and stress conditions of the ground floor columns of the building. In this embodiment, a total of eight first external connection holes 13 are provided, two of which are provided on each side. All first external connection holes 13 are arranged on the same horizontal plane. A first through hole 14 is also provided on the side of the upper sleeve 2 . In this embodiment, a total of eight first through holes 14 are provided. Two first through holes are provided on each side of the upper sleeve 2 . The first through hole is located one-fifth of the way from the bottom of the upper sleeve. The first through hole 14 functions as a grouting hole and as a ventilation hole. The bottom edge of the upper sleeve 2 is provided with a flange extending horizontally outward. A first bolt hole 15 is provided on the flange. In this embodiment, a total of eight first bolt holes 15 are provided. The first bolt holes 15 are evenly distributed on the flange.

The bottom side of the bottom floor column of the building is provided with the same number of first internal connection holes as the first external connection holes 13 on the upper sleeve 2 and the positions corresponding to each other. All the first internal connection holes are provided with first cushion layers 5 . The first cushion layer 5 has a cylindrical structure. The first cushion layer 5 is made of rubber material. The first pad 5 simultaneously passes through the first outer connection hole 10 corresponding to the first inner connection hole. The outer surface of the first cushion layer 5 is in full contact with the inner surface of the first inner connection hole. All first cushion layers 5 are connected with first bolts 4 in the middle. A fine sand concrete pouring layer 3 is provided between the upper sleeve 2 and the bottom floor column of the building.

The lower end of the upper sleeve 2 is connected with a vibration isolation module. The seismic isolation module includes a seismic isolation pad 7, an upper mounting plate 6 connected to the upper end of the seismic isolation pad 7, and a lower mounting plate 8 connected to the lower end of the seismic isolation pad. The upper mounting plate 6 and the lower mounting plate 8 are both rectangular plate structures. The upper mounting plate 6 is provided with the same number of third bolt holes 20 as the first bolt holes 15 on the upper sleeve 2 and positions corresponding to each other. The upper sleeve 2 and the upper mounting plate 6 are connected through a set of bolts. The bolts pass through the first bolt hole 15 and the third bolt hole 20 corresponding to the first bolt hole 15 at the same time to form a connection between the upper mounting plate 6 and the upper sleeve 2 . The isolation pad 7 has a cylindrical structure. The isolation pad 7 includes an upper sealing plate 22 disposed at the upper end and a lower sealing plate 23 disposed at the lower end. The upper sealing plate 22 and the lower sealing plate 23 are both circular plate structures. The upper sealing plate 22 and the lower sealing plate 23 have the same cross-section. The upper sealing plate 22 and the lower sealing plate 23 are both provided with circular hole structures in the middle. The upper sealing plate 22 is provided with threaded holes for connecting to the upper mounting plate 6 . There are six first threaded holes in total. The first threaded holes are arranged in an annular arrangement. The lower sealing plate 23 is provided with a second threaded hole for connecting the lower mounting plate 8 . The second threaded holes are arranged in a circular arrangement. The upper sealing plate 22 and the lower sealing plate 23 are arranged in parallel. Several steel sheets 26 are arranged between the upper sealing plate and the lower sealing plate. The cross section of the steel sheet 26 is the same as the cross section of the upper sealing plate 22 . The steel sheets 26 are arranged parallel to each other and equidistantly spaced. A rubber layer 25 is provided between two adjacent steel sheets 26 . A cylindrical lead core 21 is arranged in the middle of the isolation pad 7 . The side of the isolation pad is wrapped with a protective layer 27 made of rubber.

The lower end surface of the upper mounting plate 6 is provided with a circular first groove. The cross section of the first groove is the same as the cross section of the isolation pad. The upper end of the isolation pad 7 is connected in the first groove. The upper mounting plate 6 is provided with first counterbore holes that are the same number as the first threaded holes on the upper sealing plate 22 and whose positions correspond to each other. The upper mounting plate 6 and the isolation pad 7 are connected by bolts. The bolt passes through the first counterbore and is connected to the first threaded hole corresponding to the first counterbore. A circular second groove is provided on the upper surface of the lower mounting plate. The cross section of the second groove is the same as the cross section of the isolation pad. The lower end of the isolation pad 7 is connected in the second groove. The lower mounting plate 8 is provided with second countersunk holes with the same number and corresponding positions as the second threaded holes on the lower sealing plate 23 . The lower mounting plate 8 and the isolation pad 7 are connected by bolts. The bolt passes through the second countersunk hole and is connected to the second threaded hole corresponding to the second countersunk hole. The lower mounting plate 8 is also provided with a plurality of fourth bolt holes 24 . In this embodiment, a total of eight fourth bolt holes 24 are provided. The fourth bolt holes 24 are respectively provided at the edges of the lower mounting plate 8 .

Prefabricated layer-added prefabricated parts are connected below the isolation module. The prefabricated layer-increasing column includes a layer-increasing column 12 and a lower sleeve 9 sleeved on the upper end of the layer-increasing column 12 . In this embodiment, the cross section of the layer-building column 9 is rectangular. The lower end of the layer-increasing column 9 is connected to the foundation. The lower sleeve 6 is a rectangular tubular structure with an open lower end. The lower sleeve 9 is sleeved on the upper end of the layer-increasing column 9 . The upper edge of the lower sleeve 6 is provided with a flange extending horizontally outward. The flange is provided with the same number of second bolt holes 16 as the fourth bolt holes and corresponding positions. Eight second external connection holes 18 are provided on the side of the lower sleeve 6 . Each side of the lower sleeve 6 is provided with two second external connection holes 18 respectively. The second external connecting holes 18 are respectively located on the same horizontal plane. Eight second through holes 17 are provided on the side of the lower sleeve. Two second through holes 17 are provided on each side of the lower sleeve 6 . The second through holes are arranged at a distance from the upper end surface of the lower sleeve

The upper end side of the layer-building column 12 is provided with the same number of second internal connection holes as the second external connection holes and the positions corresponding to each other. All the second inner connection holes are connected with the second pad layer 11 . The second cushion layer 11 has a cylindrical structure. The second cushion layer 11 is made of rubber material. The first pad 11 simultaneously passes through the second outer connection hole 12 corresponding to the second inner connection hole. The outer surface of the second pad 11 is in full contact with the inner surface of the second inner connection hole. All second cushion layers 11 are connected with second bolts 10 in the middle. A fine sand concrete pouring layer is provided between the lower sleeve and the layer-increasing column 12 .

When using the present invention to carry out underground earthquake isolation construction and transformation of existing buildings, the construction process includes the following specific steps:

1. Measure the dimensions of the bottom floor columns of the building and determine the splicing position. Measure the dimensions of the ground floor columns of the building to determine the splicing positions of the ground floor columns and the prefabricated reinforced concrete columns of the basement addition.

2. Make prefabricated parts. According to the measurement data in step 1, make the floor-added columns, upper sleeves, lower sleeves and isolation modules that match the building's bottom-floor columns. Connect the lower sleeve and floor-added columns with bolts. A fine sand concrete pouring layer is poured between them, so that the layer-added column and the lower sleeve are assembled to form a layer-added prefabricated part. The cross-sectional area of the additional-story columns can be set according to the specific conditions of the building. The cross-sectional area of the additional-story columns can be larger or smaller than the cross-sectional area of the bottom-floor columns of the building. As a preferred solution, the cross-sectional area of the additional floor columns is the same as the cross-sectional area of the bottom floor columns of the building.

3. Install sleeves on the bottom columns of the building. Chisel the bottom surface and bottom side of the bottom floor column of the building, drill the first internal connection hole for connecting the upper sleeve on the bottom floor column of the building, sleeve the upper sleeve on the lower end of the bottom floor column of the building, and attach the upper sleeve to the lower end of the bottom floor column of the building. The first external connection holes are aligned with the corresponding first internal connection holes, the first cushions are installed in the first internal connection holes, and the first bolts are installed, and finally the through holes provided on the upper sleeve are connected to the building. A fine sand concrete pouring layer is poured between the bottom column and the upper sleeve.

During the chiseling operation, a concave and convex surface is chiselled on the concrete surface at the bottom of the column, and the height difference between the depth of the depression and the height of the protrusion is controlled to 3~5 mm.

When drilling the first internal connecting hole on the ground floor column of the building, avoid the steel bars of the ground floor column of the building. The diameter of the first internal connecting hole is 3~5 mm larger than the diameter of the first bolt. Clean the hole after drilling. The method of hole cleaning is to extend the brush to the bottom of the hole and sweep it back and forth repeatedly to bring out the dust and residue, and then introduce compressed air to further blow out the floating dust in the hole. Use absorbent cotton dipped in acetone or alcohol to scrub the inner wall of the bolt hole. Do not use water to scrub the inner wall of the hole. After cleaning, seal the bolt holes with clean absorbent cotton.

When pouring the fine sand concrete pouring layer between the bottom column and the upper sleeve of the building, the fine sand concrete should be prepared first. The mixing water should comply with the relevant provisions of the current industry standard "Concrete Water Standard" JGJ 63; the amount of water added should be the fine sand concrete configuration. The requirements are determined and should be measured by weight; fine sand concrete should be stirred fully and evenly with electric equipment, and should be allowed to stand for 2 minutes before use; after the mixing is completed, water must not be added again; the initial grouting mixture should be checked every working shift The fluidity shall be no less than 1 time, and the number of retained strength test specimens shall meet the acceptance and construction control requirements. The whole process of grouting operation should have full-time inspectors responsible for on-site supervision and timely formation of construction inspection records; during grouting construction, the ambient temperature should comply with the requirements of the instructions for use of fine sand concrete; construction should not be carried out when the ambient temperature is lower than 5°C, and shall not be performed when the ambient temperature is lower than 0°C. Construction; when the ambient temperature is higher than 30°C, measures should be taken to reduce the temperature of the fine sand concrete mixture; the grouting operation should be injected from the lower grouting hole using the grouting method. The slurry holes should be blocked immediately after flowing out; the fine sand concrete should be used up within 30 minutes after adding water.

4. Install the isolation module: Install the isolation module to the lower end of the upper sleeve through bolts. During installation, the third bolt holes on the isolation module are aligned with the first bolt holes on the upper sleeve respectively, and the bolts pass through the third bolt holes and the corresponding first bolt holes at the same time, and the isolation module is installed on the upper sleeve. The lower end of the sleeve.

5. Install the additional layer prefabricated parts under the isolation module. During installation, align the second bolt holes provided on the lower sleeve with the fourth bolt holes provided on the lower mounting plate, and build temporary supports so that the layer-added prefabricated parts remain in their current positions, and the bolts pass through the second bolt holes at the same time. The bolt holes and the corresponding fourth bolt holes fix the prefabricated layer-added components and the seismic isolation module, and at the same time, the foundation is poured to fix the bottom of the layer-added column on the foundation. When the foundation is firmly formed, remove the temporary supports.

6. Fireproof the surface of the exposed steel sleeve.

The above embodiments are illustrative of the present invention, not limitations of the present invention. Any simply transformed structure of the present invention belongs to the protection scope of the present invention.

Claims (9)

1. An assembled underground adds layer shock insulation structure, its characterized in that: the building foundation pile comprises a building foundation pile (1), wherein the lower end of the building foundation pile (1) is connected with an upper sleeve (2), the lower end of the upper sleeve (2) is connected with a shock insulation module, the lower end of the shock insulation module is connected with a layer-added prefabricated member inserted into a foundation, the layer-added prefabricated member comprises a prefabricated layer-added pile (12) and a lower sleeve (9) sleeved at the upper end of the layer-added pile (12) and connected with the shock insulation module, the bottom of the layer-added pile (12) is inserted into a foundation layer, and the shock insulation module comprises an upper mounting plate (6) connected with the upper sleeve, a lower mounting plate (8) connected with the lower sleeve and a shock insulation pad (7) connected between the upper mounting plate and the lower mounting plate;

the side surface of the bottom of the building bottom column (1) is provided with a plurality of first inner connecting holes, the upper sleeve (2) is provided with first outer connecting holes (13) which are the same as the first inner connecting holes in number and correspond to each other in position, and the first inner connecting holes and the first outer connecting holes corresponding to the first inner connecting holes are connected with first bolts (4);

a plurality of second inner connecting holes are formed in the side face of the end part of the storey adding column (12), second outer connecting holes (18) which are the same as the second inner connecting holes in number and correspond to each other in position are formed in the lower sleeve (9), and second bolts (10) are connected to the second inner connecting holes and the second outer connecting holes (18) corresponding to the second inner connecting holes;

the upper sleeve (2) is provided with a plurality of first through holes (14) for pouring concrete, and the lower sleeve (9) is provided with a second through hole (17) for pouring concrete.

2. The assembled underground storey-adding vibration isolation structure according to claim 1, wherein a fine sand concrete pouring layer is arranged between the upper sleeve (2) and the building bottom layer column (1), and a fine sand concrete pouring layer is arranged between the lower sleeve (9) and the storey-adding column (12).

3. The assembled underground storey-adding shock insulation structure according to claim 1, wherein the upper sleeve (2) is provided with first bolt holes (15) connected with the upper mounting plate (6), the lower sleeve (9) is provided with second bolt holes (16) connected with the lower mounting plate (8), the upper mounting plate (6) is provided with third bolt holes (20) which are the same in number as the first bolt holes (15) and are mutually corresponding in position, and the lower mounting plate (8) is provided with fourth bolt holes (24) which are the same in number as the second bolt holes (16) and are mutually corresponding in position.

4. A fabricated underground added layer seismic isolation structure according to claim 1, 2 or 3, wherein a first cushion layer (5) for reinforcing connection is provided between the first bolt (4) and the first inner connection hole.

5. A fabricated underground added layer seismic isolation structure according to claim 1, 2 or 3, wherein a second spacer layer (11) for reinforcing the connection is provided between the second bolt (10) and the second inner connection hole.

6. A storey-adding and shock-insulating construction process using the assembled underground storey-adding and shock-insulating structure according to any one of claims 1 to 5, characterized by comprising the following steps:

1. measuring the size of a building bottom column, and determining the splicing position;

2. manufacturing a prefabricated part: according to the measured data in the step 1, a storey adding column (12), an upper sleeve (2), a lower sleeve (9) and a shock insulation module which are matched with a building bottom column are manufactured, and the lower sleeve (9) and the storey adding column (12) are assembled to form a storey adding prefabricated member;

3. the lower end of the building bottom column (1) is provided with an upper sleeve (2);

4. installing a shock insulation module;

5. installing a layering prefabricated member;

6. and carrying out fireproof treatment on the exposed surface of the steel sleeve.

7. The storey-adding vibration isolation construction process according to claim 6, wherein in the step 3, first inner connecting holes are drilled on the building bottom layer column, roughening is carried out on the bottom of the building bottom layer column (1), first outer connecting holes (10) on the upper sleeve (10) are respectively aligned with corresponding first inner connecting holes, first cushion layers (5) are respectively installed in the first inner connecting holes, first bolts (4) are installed, and finally fine sand concrete pouring layers are poured between the building bottom layer column (1) and the upper sleeve (2) through first through holes (14) formed in the upper sleeve (2).

8. The storey-adding vibration isolation construction process according to claim 7, wherein when the first inner connecting hole is drilled on the building bottom layer column (1), steel bars on the building bottom layer column (1) are avoided, the diameter of the first inner connecting hole is 3-5 mm larger than that of the first bolt (4), and hole cleaning operation is performed after the drilling is finished.

9. The process according to claim 6, 7, 8 or the above-mentioned additional layer isolation construction process, wherein in step 4, when installing the isolation module, the upper mounting plate (6) is fixed at the lower end of the upper sleeve (2) through bolts, in step 5, when installing the additional layer prefabricated member, temporary supports are built, the additional layer prefabricated member is supported, the second bolt holes (16) arranged on the lower sleeve (9) are aligned with the fourth bolt holes (24) arranged on the lower mounting plate respectively, the additional layer prefabricated member is fixed through bolting, the foundation is poured, the bottom of the additional layer column (12) is fixed on the foundation, and after the foundation is firmly formed, the temporary supports are removed.