CN211229623U

CN211229623U - Urban underground civil air defense engineering slab-column structure center pillar anti-seismic reinforcing structure

Info

Publication number: CN211229623U
Application number: CN201921739284.0U
Authority: CN
Inventors: 冯进技; 杜建国; 李宁; 郑永来; 郑全平
Original assignee: Institute of Engineering Protection National Defense Engineering Research Institute Academy of Military Sciences of PLA
Current assignee: Institute of Engineering Protection National Defense Engineering Research Institute Academy of Military Sciences of PLA
Priority date: 2019-10-17
Filing date: 2019-10-17
Publication date: 2020-08-11
Anticipated expiration: 2029-10-17

Abstract

The utility model discloses a central column earthquake-resistant reinforcing structure of an urban underground civil air defense engineering slab column structure, which comprises a concrete central column, carbon fiber cloth and profile steel, wherein the carbon fiber cloth is arranged around the outer side of the concrete central column, and the profile steel is arranged on the outer side of the carbon fiber cloth; the carbon fiber cloth is wrapped and stuck on the concrete center post through the carbon fiber rubber ring; four corners of the concrete center pillar are respectively provided with an anchoring part; the section steel be two pairs of prefabricated shaped steel template A and shaped steel template B, shaped steel template A and shaped steel template B comprise two angle steel and two steel sheets respectively, the angle steel in shaped steel template A and the shaped steel template B respectively with the four corners anchor assembly fixed connection of concrete center pillar. The utility model discloses a cooperation of carbon cloth and prefabricated shaped steel is used, has reached dual reinforcement, has both improved the bearing capacity and the ductility of secret civil air defense post component, has improved anti-seismic performance, also makes the construction convenient simultaneously, easily operates.

Description

Urban underground civil air defense engineering slab-column structure center pillar anti-seismic reinforcing structure

Technical Field

The utility model belongs to the technical field of city underground civil air defense engineering antidetonation, mainly relate to a city underground civil air defense engineering slab post structure center pillar reinforced structure that combats earthquake.

Background

With the development of national economy and the acceleration of urbanization process, the development and utilization of underground space become hot spots, and the scale of civil air defense engineering construction is also continuously increased. The urban underground civil air defense engineering is responsible for important missions of 'preventing disasters at ordinary times and preventing air attacks in wartime', so that the safety of the civil air defense engineering structure must be ensured. Meanwhile, earthquakes occur frequently in China, so that a large amount of engineering construction damage and life and property loss are caused, and the development of the existing civil air defense engineering earthquake-resistant technology is relatively lagged.

The civil air defense engineering plate column structure has the advantages of simple structure, simple force transmission path, high clearance utilization rate, attractive appearance, convenience in ventilation, convenience in pipeline arrangement, convenience in construction and the like, is generally adopted in urban underground civil air defense engineering, and is particularly suitable for civil air defense engineering such as large-area underground commercial streets, underground shopping malls, underground garages and the like. Therefore, the anti-seismic reinforcing structure is provided for the middle column of the constructed civil air defense engineering slab-column structure, is convenient to construct, easy to operate and good in reinforcing effect, and lays a foundation for improving the anti-seismic capacity of urban underground civil air defense engineering and ensuring the safety of lives and properties.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a city underground civil air defense engineering slab column structure center pillar reinforced structure that combats earthquake, for realizing the purpose of the above utility model, the utility model discloses take following technical scheme:

a center pillar earthquake-resistant reinforcing structure of an urban underground civil air defense engineering slab column structure comprises a concrete center pillar, carbon fiber cloth and section steel, wherein the carbon fiber cloth is arranged on the outer side of the concrete center pillar in a surrounding mode, and the section steel is arranged on the outer side of the carbon fiber cloth; the carbon fiber cloth is wrapped and stuck on the concrete center post through the carbon fiber rubber ring; four corners of the concrete center pillar are respectively provided with an anchoring part; the steel section is a two-pair prefabricated steel section template A and a steel section template B, the steel section template A and the steel section template B are respectively composed of two angle steels and two steel plates, the angle steels in the steel section template A and the steel section template B are respectively and fixedly connected with the four-corner anchoring parts of the concrete center column, the steel plates on the steel section template A are welded with the angle steels on the steel section template B when the mold is closed, the steel plates on the steel section template B are welded with the angle steels on the steel section template A, a gap exists between the steel section and the concrete center column after the mold is closed, an upper gap and a lower gap are respectively reserved at the top end and the bottom end of the steel section, and a; and a grouting opening is formed in the upper gap.

And filling filler is injected into gaps between the profile steel and the concrete center column to fill the gaps.

The carbon fiber cloth is overlapped and adhered to the upper layer and the lower layer.

The protective layer is high-strength cement mortar with a built-in steel wire mesh, and the thickness of the mortar is 25 mm.

The anchoring part is a chemical bar planting anchoring part.

Four corners of the concrete center pillar are rounded corners.

To sum up, the utility model relates to a city underground civil air defense engineering plate column structure center pillar antidetonation reinforced structure through the dual reinforcement that adopts carbon cloth and prefabricated shaped steel, has both improved the bearing capacity and the ductility of secret civil air defense post component, has improved anti-seismic performance, also makes the construction convenient simultaneously, easily operation.

Drawings

Fig. 1 is an elevation view of the present invention.

Fig. 2 is a cross-sectional view taken along line a-a of fig. 1.

Figure 3 is a plan view of the medium steel form of the present invention.

In the figure: 1. The steel plate comprises a concrete center column, 2 parts of angle steel, 3 parts of carbon fiber cloth, 4 parts of filler, 5 parts of steel plate, 6 parts of section steel templates A and 7 parts of section steel templates B.

Detailed Description

The present invention will be described with reference to the accompanying drawings.

As shown in fig. 1, 2 and 3, the central column earthquake-resistant reinforcing structure of the urban underground civil air defense engineering slab column structure comprises a concrete central column 1, a carbon fiber cloth 3 and section steel, wherein the carbon fiber cloth 3 is arranged around the outer side of the concrete central column 1, and the section steel is arranged on the outer side of the carbon fiber cloth 3; the carbon fiber cloth 3 is wrapped and adhered to the concrete center pillar 1 through a carbon fiber adhesive ring; four corners of the concrete center pillar 1 are respectively provided with an anchoring part; the section steel is two pairs of prefabricated section steel templates A6 and B7, the section steel templates A6 and B7 are respectively composed of two angle steels 2 and two steel plates 5, the angle steels 2 in the section steel templates A6 and B7 are respectively fixedly connected with four-corner anchoring parts of the concrete center pillar 1, the arrangement of the anchoring parts can lead the section steel templates A6 and B7 to be fixed firmly with the concrete center pillar 1, when the die is closed, the steel plate 5 on the section steel template A6 is welded with the angle steel 2 on the section steel template B7, the steel plate 5 on the section steel template B7 is welded with the angle steel 2 on the section steel template A6, the prefabricated section steel template A6 and the prefabricated section steel template B7 are adopted, the construction difficulty is simplified, the construction progress is accelerated, a gap is formed between the section steel and the concrete center column 1 after the die assembly, an upper gap and a lower gap are respectively reserved at the top end and the bottom end of the section steel, and a protective layer is arranged on the outer side of the section steel; and a grouting opening is formed in the upper gap.

The gap between the section steel and the concrete center pillar 1 is filled by injecting a filler 4 into the gap, so that the section steel and the concrete center pillar 1 can be tightly connected into a whole.

The carbon fiber cloth 3 is formed by overlapping and pasting an upper layer and a lower layer.

The protective layer is high-strength cement mortar with a built-in steel wire mesh, the thickness of the mortar is 25mm, the arrangement of the protective layer can effectively improve the corrosion resistance and the fire resistance of the member, and the service life of the member is prolonged.

The anchoring part is a chemical bar planting anchoring part.

Four corners of the concrete center pillar 1 are rounded corners.

The utility model discloses a reinforcement construction method as follows:

a. polishing and flattening the base surface of the concrete center pillar 1 by using an angle grinder and abrasive paper, and removing laitance on the surface of the concrete;

b. grinding and rounding edges and corners of the central column with the rectangular section, wherein the rounding radius is not less than 7 mm;

c. cleaning dust and impurities on the surface of the concrete by using a blower and an inflator, dipping acetone or alcohol in absorbent cotton to remove grease on the surface of the concrete, and keeping clean and dry;

d. uniformly mixing a curing agent and a main agent, and blade-coating the mixture on the surface of the concrete center pillar 1 by using a brush;

e. confirming the sticking direction of the carbon fiber cloth 3, sticking the carbon fiber glue coating surface to ensure that the carbon fiber glue is fully impregnated on the carbon fiber cloth 3, and overlapping and sticking the upper layer and the lower layer of the carbon fiber cloth 3 to ensure that the overlapping width and the position between the upper layer and the lower layer meet the requirements without leaving air bubbles;

f. respectively fixing anchoring parts at four corners of the concrete center post 1;

g. respectively connecting the section steel template A6 and the section steel template B7 with an anchoring piece, clamping the section steel template A6 and the section steel template B7 by using a clamp after die assembly, and then mutually welding the section steel template A6 and the section steel template B7;

h. sealing the periphery of the angle steel by using epoxy cement, reserving an exhaust hole, pressing epoxy resin slurry from a grouting opening under the pressure of 0.2-0.4 MPa after ventilation and pressure test, stopping pressurization after slurry appears in the exhaust hole, sealing the hole by using the epoxy cement, and stopping grouting after maintaining the lower pressure for more than 10 min;

j. and finally, smearing high-strength cement mortar with the thickness of 25mm on the surfaces of the angle steel 2 and the concrete center pillar 1, and adding a steel wire mesh anti-cracking protective layer, or adopting other decorative materials with anti-corrosion and fireproof performances for protection.

The invention is not described in detail in the prior art, and although the invention has been specifically shown and described in connection with the preferred embodiments, the method and the way of implementing the technical solution are numerous, and only the preferred embodiments of the invention have been described above, it should be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims, which are within the scope of the invention.

Claims

1. A central column earthquake-resistant reinforcing structure of an urban underground civil air defense engineering slab column structure comprises a concrete central column (1), carbon fiber cloth (3) and section steel, wherein the carbon fiber cloth (3) is arranged on the outer side of the concrete central column (1) in a surrounding mode, and the section steel is arranged on the outer side of the carbon fiber cloth (3); the method is characterized in that: the carbon fiber cloth (3) is wrapped and adhered to the concrete center pillar (1) through a carbon fiber adhesive ring; four corners of the concrete center pillar (1) are respectively provided with an anchoring part; the steel section is composed of two pairs of prefabricated steel section templates A (6) and B (7), each of the steel section templates A (6) and B (7) is composed of two angle steels (2) and two steel plates (5), the angle steels (2) in the steel section templates A (6) and B (7) are fixedly connected with four corner anchoring pieces of the concrete center column (1) respectively, the steel plates (5) on the steel section templates A (6) and the angle steels (2) on the steel section templates B (7) are welded and connected during mold closing, the steel plates (5) on the steel section templates B (7) and the angle steels (2) on the steel section templates A (6) are welded and connected, a gap exists between the steel section and the concrete center column (1) after mold closing, an upper gap and a lower gap are reserved at the top end and the bottom end of the steel section respectively, and a protective layer is arranged on the outer side of the steel section; and a grouting opening is formed in the upper gap.

2. The central column earthquake-resistant reinforcing structure of the urban underground civil air-defense engineering plate column structure as claimed in claim 1, which is characterized in that: the gap between the section steel and the concrete center pillar (1) is filled by filling a filler (4) into the gap, so that the section steel and the concrete center pillar (1) can be tightly connected into a whole.

3. The central column earthquake-resistant reinforcing structure of the urban underground civil air-defense engineering plate column structure as claimed in claim 1, which is characterized in that: the carbon fiber cloth (3) is lapped and stuck on the upper layer and the lower layer.

4. The central column earthquake-resistant reinforcing structure of the urban underground civil air-defense engineering plate column structure as claimed in claim 1, which is characterized in that: the protective layer is high-strength cement mortar with a built-in steel wire mesh, and the thickness of the mortar is 25 mm.

5. The central column earthquake-resistant reinforcing structure of the urban underground civil air-defense engineering plate column structure as claimed in claim 1, which is characterized in that: the anchoring part is a chemical bar planting anchoring part.

6. The central column earthquake-resistant reinforcing structure of the urban underground civil air-defense engineering plate column structure as claimed in claim 1, which is characterized in that: four corners of the concrete center pillar (1) are round corners.