CN101845898A - Reinforced concrete structure electrochemical embedded type reinforcing method and device thereof - Google Patents

Abstract

The invention relates to the reinforcement field of reinforced concrete structures, and discloses an electrochemical embedded reinforcement method and device for reinforced concrete structures. The reinforcement method includes the steps of: opening a groove according to a specified size at the reinforcement area of the reinforced concrete structure body; The adhesive is applied on the aluminum alloy stiffened outer plate fixedly connected to the surface of the reinforced concrete structure body reinforcement area and on the side of the aluminum alloy stiffened column adapted to the shape of the groove, and will be formed by the stiffened outer plate and The aluminum alloy reinforcements connected by the stiffening columns are pasted on the surface of the reinforcement area of the reinforced concrete structure body; they can repair and improve the bearing capacity and durability of the reinforced concrete, improve the cost performance and improve the safety of the structure. At the same time, good ductility is guaranteed, and no adhesive is applied to the end of the aluminum alloy stiffened column, so that the steel bars in the reinforced concrete structure can be protected or rust-proofed.

Description

Electrochemical embedded reinforcement method and device for reinforced concrete structure

technical field

The invention relates to the reinforcement field of reinforced concrete structures, in particular to an electrochemical embedded reinforcement method and device for reinforced concrete structures.

Background technique

Under the combined action of load and coastal corrosion environment, the performance degradation of concrete structures is often accompanied by the development of concrete cracks, and various structural reinforcement technologies derived from this have been widely used in engineering practice.

Among them, in the prior art, a reinforced concrete structure reinforcement method of externally attaching fiber reinforced polymer (Fiber Reinforced Polymer, FRP for short) is often used. However, due to the complexity of the structural reinforcement project and the characteristics of the reinforcement material itself, there are still some problems that need further research in the reinforcement technology of concrete structures in the coastal environment. For example: FRP is a brittle material, and concrete structures strengthened with FRP tend to have poor ductility.

Therefore, the prior art still needs to be improved and developed.

Contents of the invention

The technical problem to be solved by the present invention is to provide a reinforced concrete structure electrochemical embedded reinforcement method and device for the above-mentioned defects of the prior art, which can repair and improve the bearing capacity and durability of the reinforced concrete structure, and at the same time Ensure better ductility and reduce reinforcement costs.

The technical solution adopted by the present invention to solve technical problems is as follows:

An electrochemical embedded reinforcement method for a reinforced concrete structure, comprising the steps of:

A. Open a groove according to the specified size at the reinforcement area of the reinforced concrete structure body, and remove the dust in the groove;

B. Apply the adhesive to the aluminum alloy stiffened outer plate fixedly connected to the surface of the reinforcement area of the reinforced concrete structure body and the side of the aluminum alloy stiffened column adapted to the shape of the groove, and use the stiffened The aluminum alloy reinforcing piece formed by connecting the outer plate and the stiffening column is pasted on the surface of the reinforced area of the reinforced concrete structure body;

C. Clamp the surface of the reinforced area of the aluminum alloy plate and the reinforced concrete structure body with a clamp or fix it with a support structure.

The electrochemical embedded reinforcement method for reinforced concrete structures, wherein, steps A and B also include:

A1. Grinding and smoothing the inner surface of the groove;

The electrochemical embedded reinforcement method for reinforced concrete structures, wherein, steps A1 and B also include:

A2. Clean the inner surface of the groove in the reinforcement area of the reinforced concrete structure body and the dust on the aluminum alloy plate.

The electrochemical embedded reinforcement method for reinforced concrete structures, wherein, steps B and C also include:

B1. Refill the missing part with adhesive as needed, and squeeze it to squeeze out the air mixed in the paste area, and remove the excess adhesive.

The electrochemical embedded reinforcement method for reinforced concrete structures, wherein, after the step C, also includes the steps:

D. After the adhesive hardens, the surface of the reinforced structure should be cleaned and leveled again.

The electrochemical embedded reinforcement method for reinforced concrete structures, wherein the adhesive is a modified epoxy resin adhesive.

An electrochemical embedded reinforcing device for a reinforced concrete structure, comprising a reinforced concrete structure body, wherein it also includes an aluminum alloy reinforcement and a groove opened on the reinforced concrete structure body, and the aluminum alloy reinforcement includes A stiffening column adapted to the shape of the groove, and a stiffening outer plate fixedly connected to the stiffening column and fixed on the outer surface of the reinforced area of the reinforced concrete structure body.

The electrochemical embedded reinforcement device for reinforced concrete structures, wherein, the side surface of the stiffening column is provided with a first adhesive layer, and the stiffening column is glued and connected to the groove through the first adhesive layer .

The electrochemical embedded reinforcement device for reinforced concrete structure, wherein, the outer surface of the reinforcement area of the reinforced concrete structure body is provided with a second adhesive layer, and the stiffened outer plate is connected with the second adhesive layer through the second adhesive layer. The outer surface of the reinforcement area of the reinforced concrete structure body is pasted and connected.

The electrochemical embedded reinforcing device for reinforced concrete structure, wherein, both the first adhesive layer and the second adhesive layer are modified epoxy resin adhesive layers.

The electrochemical embedded reinforcement method and device for reinforced concrete structures provided by the present invention, because the aluminum alloy plate is pasted in the groove of the reinforcement area of the reinforced concrete structure, and the aluminum alloy plate has excellent corrosion resistance The strength and plasticity similar to that of steel can better solve the shortcomings of existing reinforcement methods; and the aluminum alloy reinforcement is reinforced on the surface of the reinforcement area of the reinforced concrete structure to make the overall structure more reliable and reduce the reinforcement. cost; and no adhesive is applied at the end of the aluminum alloy stiffened column, so that the steel bars in the reinforced concrete structure can be protected or rust-proof.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of an electrochemical embedded reinforcing device for a reinforced concrete structure provided by an embodiment of the present invention;

Fig. 2 is a flowchart of an electrochemical embedded reinforcement method for reinforced concrete structures provided by an embodiment of the present invention.

Detailed ways

An electrochemical embedded reinforcement method and device for reinforced concrete structures of the present invention. In order to make the purpose, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

An electrochemical embedded reinforcing device for a reinforced concrete structure provided by an embodiment of the present invention, as shown in FIG. 1 , includes a reinforced concrete structure body 140 and a main steel bar 130 disposed in the reinforced concrete structure body 140 . It also includes an aluminum alloy reinforcement 200 and grooves 141 provided on the reinforced concrete structure body. The size, shape and specific number of the grooves 141 should be determined according to the need for reinforcement. As in this embodiment, two grooves 141 are provided on the rectangular beam of the reinforced concrete structure.

Further, the aluminum alloy reinforcement 200 includes a stiffening column 210 that fits in shape with the groove 141 and a stiffening outer plate 220 that is fixedly connected with the stiffening column 210 . The stiffened outer plate 220 fits snugly with the outer surface of the reinforced area of the reinforced concrete structure body. In this way, the aluminum alloy reinforcement 200 formed by the fixed connection of the stiffening column 210 and the stiffening outer plate 220 is embedded in the reinforced concrete structure body 140 through the engagement of the stiffening column 210 and the groove 141. connection. The overall reliability of the reinforced concrete structure can be improved.

Further, the side surface of the stiffening column 210 is provided with a first adhesive layer 121 , and the stiffening column 210 is adhesively connected to the groove 141 through the first adhesive layer 121 . It should be emphasized that in the present invention, no adhesive is applied to the end of the aluminum alloy stiffening column 210, because aluminum alloy is a metal material with low potential. If the aluminum alloy and the steel bar are connected, the aluminum alloy will undergo galvanic corrosion, and the steel bar can be protected or derusted. Therefore, in the present invention, no adhesive is applied to the end of the aluminum alloy stiffening column 210, so that the steel bars in the reinforced concrete structure can be protected or rust-proofed.

The electrochemical embedded reinforcement device for reinforced concrete structure, wherein, the outer surface of the reinforced area of the reinforced concrete structure body 141 is provided with a second adhesive layer 122, and the stiffened outer plate 220 is bonded by the second bonding agent. The agent layer 122 is pasted and connected to the outer surface of the reinforcement area of the reinforced concrete structure body.

Preferably, both the first adhesive layer 121 and the second adhesive layer 122 are modified epoxy resin adhesive layers. And the thickness of the adhesive layer is about 3mm.

Of course, the body of the reinforced concrete structure reinforced by the present invention is not limited to the above-mentioned rectangular beam structure, and may also be in various shapes of reinforced concrete structures that need to be reinforced, such as cylindrical and so on.

In this way, the electrochemical embedded reinforcement device for reinforced concrete structure of the present invention adopts an aluminum alloy plate with excellent corrosion resistance and strength and plasticity similar to steel, which can better solve the deficiencies of existing reinforcement methods; it can Repair and improve the bearing capacity and durability of reinforced concrete, improve the cost performance and improve the safety of the structure, while ensuring better ductility and making the overall structure more reliable. In addition, no adhesive is applied to the end of the aluminum alloy stiffened column, so that the steel bars in the reinforced concrete structure can be protected or rust-proofed.

Based on the above-mentioned electrochemical embedded reinforcement device for reinforced concrete structure, the embodiment of the present invention also provides an electrochemical embedded reinforcement method for reinforced concrete structure, as shown in Figure 2, that is, the above-mentioned electrochemical embedded reinforcement for reinforced concrete structure The specific strengthening method of the device includes the following steps:

S301. In the reinforcement area of the reinforced concrete structure body 140, use a stone cutting machine to open grooves 141 according to the specified size, two grooves 141 as shown in Figure 1, and remove the dust in the grooves 141;

S302. Grinding and smoothing the surface of the reinforced area of the reinforced concrete structure body; that is, as shown in FIG. 1 , grinding and smoothing the surface of the groove 141 in the reinforced area of the reinforced concrete structure body 140 .

S303. After the surface of the groove 141 in the reinforced area of the reinforced concrete structure body to be polished and cleaned is dry, clean the inner surface of the groove in the reinforced area of the reinforced concrete structure body and the dust on the aluminum alloy plate with a cleaning agent.

S304. Stir the used binder evenly according to usage requirements.

S305. Prepare the aluminum alloy reinforcement 200 that is compatible with the surface of the reinforcement area of the reinforced concrete structure body and the groove 141 at the same time, and apply the adhesive on both sides of the groove 141 (as shown in FIG. 1 411 and 412 shown, keep its top surface without adhesive smearing) and the outer surface 142 of the reinforced area with the reinforced concrete structure body 140, and apply the adhesive to the surface of the reinforced area with the reinforced concrete structure body 140 On the stiffening outer plate 220 fixedly connected, and on the side of the stiffening column 210 that is adapted to the shape of the groove 141 (adhesive is not applied at the end of the aluminum alloy stiffening column), and the stiffening outer plate 220 and the The aluminum alloy reinforcement 200 formed by connecting the stiffening columns 210 is pasted on the reinforcement area of the reinforced concrete structure body.

S306. Check whether there is a missing part that is not filled with adhesive, then fill the missing part with adhesive again as needed, and squeeze it to squeeze out the air mixed in the pasting area, and remove the excess adhesive .

S307. Use clamps to clamp or fix the surface of the reinforced area of the aluminum alloy plate and the reinforced concrete structure body with a support structure, and apply appropriate pressure to ensure the reliability of the bond.

S308. After the adhesive is hardened, clean the surface of the structure again to keep the surface smooth.

The electrochemical embedded reinforcement method and device for reinforced concrete structures provided by the present invention, because the aluminum alloy plate is pasted in the groove of the reinforcement area of the reinforced concrete structure, and the aluminum alloy plate has excellent corrosion resistance The strength and plasticity similar to that of steel can better solve the shortcomings of existing reinforcement methods; and the aluminum alloy reinforcement is reinforced on the surface of the reinforcement area of the reinforced concrete structure to make the overall structure more reliable and reduce the reinforcement. cost; and no adhesive is applied at the end of the aluminum alloy stiffened column, so that the steel bars in the reinforced concrete structure can be protected or rust-proof; at the same time, the present invention has the following advantages:

(1) Due to the high strength and low quality of aluminum alloy reinforcements, the strength and ductility are similar to those of structural steel, and the density is only 1/3 of steel. Therefore, the use of aluminum alloys to strengthen concrete structures is expected to improve the safety of the structure without significantly increasing the self-weight of the structure, while ensuring better ductility.

(2) When the aluminum alloy is exposed to the air, a dense oxide film will be formed rapidly on its surface, which has excellent corrosion resistance. Therefore, the use of aluminum alloy as a repair and reinforcement material can effectively insulate the concrete structure from the coastal corrosion environment without increasing the overall anticorrosion cost of the structure.

(3) Flexible reinforcement form: aluminum alloy can be quickly and economically processed into various cross-section types by extrusion technology, which is the most prominent advantage of aluminum alloy over structural steel.

(4) Good cost performance: The functions that the structure needs to meet (ie safety, applicability and durability requirements) and the complexity of the construction project lead to the material price per unit weight is by no means the most important indicator for selecting structural materials. For the overall cost of strengthening concrete structures in coastal corrosive environments, the material price may account for a lower proportion of the total cost.

(5) Electrochemical performance of aluminum alloy: aluminum alloy is a metal material with low potential. If the aluminum alloy and the steel bar are connected, the aluminum alloy will undergo galvanic corrosion, and the steel bar can be protected or derusted. This is a very potential electrochemical embedded reinforcement method for reinforced concrete structures

It should be understood that the application of the present invention is not limited to the above examples, and those skilled in the art can make improvements or transformations according to the above descriptions, and all these improvements and transformations should belong to the protection scope of the appended claims of the present invention.

Claims (10)

1. a reinforced concrete structure electrochemical embedded type reinforcing method is characterized in that, comprises step:

A, size is offered groove in accordance with regulations in reinforced concrete structure body reinforcing area position, and removes the dust in the described groove;

B, with cementing agent spread upon the aluminium alloys of fixedlying connected with described reinforced concrete structure body reinforcing area surface put more energy on the outside plate, and and the adaptive aluminium alloys stiffening column side of described groove shapes on, and will stick on the reinforcing area surface of described reinforced concrete structure body by the aluminium alloys girth member that described put more energy into outside plate and described stiffening column are formed by connecting;

C, with clamp or with the fixing reinforcing area surface of aluminium alloy plate and reinforced concrete structure body of braced structures.

2. reinforced concrete structure electrochemical embedded type reinforcing method according to claim 1 is characterized in that, also comprises step between described steps A and the B:

A1, described groove inner surface polishing cleaning is smooth;

3. reinforced concrete structure electrochemical embedded type reinforcing method according to claim 2 is characterized in that, also comprises step between described steps A 1 and the B:

A2, the groove inner surface of described reinforced concrete structure body reinforcing area and the dust on the described aluminum alloy plate materials are cleaned out.

4. reinforced concrete structure electrochemical embedded type reinforcing method according to claim 1 is characterized in that, also comprises step between described step B and the C:

B1, will be short of part as required and pour into cementing agent again, and push, the air of sneaking into sticking area will be extruded, and with unnecessary cementing agent removing.

5. reinforced concrete structure electrochemical embedded type reinforcing method according to claim 1 is characterized in that, also comprises step after the described step C:

D, after cementing agent sclerosis, clear up smooth once more to the ruggedized construction surface.

6. reinforced concrete structure electrochemical embedded type reinforcing method according to claim 1 is characterized in that, described cementing agent adopts modified epoxy resin adhesive.

7. reinforced concrete structure electrochemical embedded type bracing means, comprise the reinforced concrete structure body, it is characterized in that, it also comprises an aluminium alloys girth member and the groove of offering on described reinforced concrete structure body, described aluminium alloys girth member comprises stiffening column and the put more energy into outside plate that with described stiffening column fixedly connected and that be fixed on described reinforced concrete structure body reinforcing area external surface adaptive with described groove shapes.

8. reinforced concrete structure electrochemical embedded type bracing means according to claim 7 is characterized in that, described stiffening column side surface is provided with first adhesive layer, and described stiffening column is pasted with described groove by the described first knot agent layer and is connected.

9. reinforced concrete structure electrochemical embedded type bracing means according to claim 8, it is characterized in that, described reinforced concrete structure body reinforcing area external surface is provided with second adhesive layer, and the described outside plate of putting more energy into is pasted with described reinforced concrete structure body reinforcing area external surface by described second adhesive layer and is connected.

10. reinforced concrete structure electrochemical embedded type bracing means according to claim 9 is characterized in that, described first adhesive layer and second adhesive layer all are the modified epoxy resin adhesive layer.

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