Method for reinforcing a reinforced concrete column with square corrugated steel sleeves and reinforced structure

Abstract

The application belongs to the technical field of building engineering, and particularly relates to a square corrugated steel sleeve reinforced reinforced concrete column method and a reinforced structure, which comprises a reinforced concrete column body, a group of corrugated steel plates, a group of angle steels and a group of flange plates, a floor and a reinforced concrete beam; the corrugated steel plates are connected with the angle steels and the flange plates through welding, the angle steels and the flange plates are connected through bolts, the square corrugated steel sleeve is wrapped outside the reinforced concrete column body, and grouting material is poured between the reinforced concrete column body and the corrugated steel sleeve; the square corrugated steel sleeve has large local rigidity, construction formwork, cofferdams and a large number of local reinforcing structures are saved, a large amount of structural steel and on-site welding operations can be reduced compared with ordinary steel plate reinforcement; the corrugated steel plates are spliced through bolts, sleeve assembly construction is convenient, and even in special underwater operation, the corrugated steel plates have certain applicability.

Description

Technical Field

[0001] This invention belongs to the field of building engineering technology, specifically a method and reinforcement structure for reinforcing reinforced concrete columns with square corrugated steel sleeves. Background Technology

[0002] Buildings are subject to various types of damage during use, mainly categorized into man-made damage and natural damage. Man-made damage includes damage to local structures caused by improper use, vehicle collisions, and defects in design and construction. Natural damage refers to damage caused by various natural factors (wind, rain, fire, earthquakes, etc.) encountered by buildings in daily life. Modern buildings are primarily constructed with reinforced concrete, and columns, as a crucial component supporting the building structure, are also mostly made of reinforced concrete. Given the service life design regulations for building structures in my country's current "Code for Design of Concrete Structures," most building structures in my country are currently in need of reinforcement and renovation, making the reinforcement of reinforced concrete columns particularly important. Currently, the vast majority of old and dilapidated building frames use reinforced concrete, and the cost of reinforcement can generally reach 30% to 40% of the cost of new construction. Developing high-strength, early-strength, high-durability, and easy-to-construct RC column reinforcement technology is of great significance for the continued service of RC frames. Currently, a series of theoretical, experimental, and practical studies on RC column reinforcement have been conducted in China, including methods such as increasing the cross-section, external steel cladding, and external composite material cladding (such as GFRP / CFRP).

[0003] However, the above-mentioned technologies often have the following drawbacks: 1. Concrete columns reinforced by cross-section enlargement exhibit obvious two-stage stress characteristics, resulting in insufficient improvement in the mechanical properties of the column components; 2. The improvement in the durability of the reinforced column is limited, and the insufficient durability of the reinforcing material itself leads to cracking or aging, which in turn increases the burden on the original structure; 3. The interface between the new and old materials is difficult to bond tightly and cooperate in stress distribution, and the reinforcing material may separate from the old RC column or fail earlier than the original structure; 4. Using new materials or steel structures to wrap and constrain damaged column components can achieve good mechanical properties, but the material costs are high, and for steel structures, frequent maintenance is still difficult to avoid. In summary, existing reinforced concrete columns, damaged by impacts, rainwater erosion, earthquakes, etc., urgently need reinforcement and renovation to improve their performance and prevent collapse accidents. However, current reinforcement technologies still suffer from problems such as high material costs and insufficient durability. Therefore, this invention provides a method and reinforcement structure for reinforcing reinforced concrete columns with square corrugated steel sleeves. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: A reinforcement structure for reinforced concrete columns using a square corrugated steel sleeve, comprising a reinforced concrete column body, a set of corrugated steel plates, a set of angle steels and a set of flange plates, a floor slab, and a reinforced concrete beam; the corrugated steel plates are welded to the angle steels and flange plates, and the angle steels and flange plates are bolted together to form a square corrugated steel sleeve that wraps around the reinforced concrete column body; grout is poured between the reinforced concrete column body and the corrugated steel sleeve; a fixing plate is welded to the end of the angle steel, and then anchor bolts are driven in to connect the fixing plate to the floor slab; a reinforced concrete beam is connected to the floor slab.

[0006] The angle steel and flange plate have pre-drilled holes at the troughs of the corrugated steel along their length. The corrugated steel plate is connected by bolts passing through the angle steel and flange plate. The square corrugated steel sleeve is a spliced ​​sleeve, and the corrugated steel plate is a galvanized corrugated steel plate.

[0007] A connecting frame is bolted to the inner wall of the corrugated steel plate near the top surface. A cavity is opened in the connecting frame, and a set of heating wires is installed in the cavity. A pressure plate is slidably connected to the inner wall of the cavity. An electric telescopic rod is fixedly connected to the top surface of the connecting frame by a bracket. The output end of the electric telescopic rod is slidably connected to the top surface of the connecting frame, and the bottom surface of the output end is fixedly connected to the pressure plate.

[0008] The cavity is connected to multiple sets of circular tubes, and multiple sets of circular holes are opened on the surface of the circular tubes. A sealing mechanism is provided on the circular tubes to seal the circular holes.

[0009] A connector is fixedly connected to the top surface of the connecting frame, and a feed pipe is connected to the bottom surface of the connector.

[0010] The sealing mechanism includes a sealing block that is slidably connected to the inner wall of the circular hole. The sealing block has an opening on the side near the circular tube. A connecting plate is fixedly connected to the port of the sealing block. An air inlet is provided on the connecting plate. An arc-shaped plate is torsionally connected to the side of the connecting plate near the outer wall of the circular tube by a torsion spring. The arc-shaped plate is used to seal the air inlet. A set of circular grooves communicating with the inside of the sealing block are provided on the side wall. The inner wall of the circular hole can seal the circular grooves. An elastic element is provided between the side wall of the sealing block and the side wall of the circular tube.

[0011] The circular tube has a movable groove near the circular hole, and a dredging block for clearing the circular hole is slidably connected in the movable groove. The top surface of the dredging block is inclined.

[0012] A circular ring is slidably connected to the side wall of the circular tube. An avoidance groove for the sealing block is opened on the inner wall of the circular ring. A magnetic block is fixedly connected to the inner side wall of the avoidance groove. The magnetic block and the sealing block are magnetically attracted. A circular disk that is magnetically attracted to the magnetic block is slidably connected inside the circular tube. An air guide hole is opened at the center of the circular disk. A sealing component is installed in the air guide hole. A liquid inlet pipe is connected to the cavity. The pressure plate and the surface of the liquid inlet pipe are slidably connected in a sealing manner.

[0013] The sealing assembly includes a connecting groove formed inside the disc and communicating with the air guide hole. The connecting groove is L-shaped. A rotating shaft is torsionally connected to the inner wall of the connecting groove via a torsion spring. A connecting wire is fixedly connected to the surface of the rotating shaft. A locking rod is slidably connected to the horizontal end of the connecting groove. A sealing block is slidably connected to the inner wall of the air guide hole. A first elastic rope is fixedly connected between the top surface of the sealing block and the inner wall of the air guide hole. A locking groove for engaging with the locking rod is formed on the side wall of the sealing block near the rotating shaft. An elastic element is provided between the side of the sealing block near the rotating shaft and the inner wall of the connecting groove. A drive rod is fixedly connected to the side wall of the circular tube near the top surface via a bracket. The drive rod is used to drive the rotating shaft to rotate.

[0014] The connecting frame has a sliding groove, and a sealing plate is slidably connected in the sliding groove. The sealing plate extends into the feed pipe. A second elastic rope is fixedly connected between the sealing plate and the inner wall of the sliding groove. A hollow elastic block is fixedly connected to the bottom surface of the connecting frame. The inner wall of the sliding groove has a through hole communicating with the elastic block.

[0015] A method for reinforcing a reinforced concrete column with a square corrugated steel sleeve, the method employing the aforementioned square corrugated steel sleeve reinforcement structure for reinforced concrete columns, and the method includes the following steps:

[0016] S1: First, inspect and clean the reinforced concrete column body to ensure that there is no accumulated soil, loose concrete, or other debris on the surface. Then, measure and determine the size and location of the sleeve;

[0017] S2: Assemble the pre-made corrugated steel plates along the four sides of the reinforced concrete column body to form a square corrugated steel sleeve. Assembly can be done with the help of angle steel and flange plates.

[0018] S3: After the square corrugated steel sleeve is installed, the grouting pipe is connected to the joint, and then the high-strength grouting material is injected from the feed pipe between the reinforced concrete column body and the corrugated steel plate.

[0019] S4: After filling with grout, it is necessary to ensure that the inside of the sleeve is completely filled and that the grout is in close contact with the original concrete column, and then wait for the concrete to cure and reach the design strength.

[0020] S5: After the grout has fully cured, the surface is repaired and treated to improve its appearance and protective performance. Surface defects are repaired with mortar, and necessary coatings or waterproofing treatments are applied.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. The square corrugated steel sleeve of the present invention has a large local rigidity, which eliminates the need for construction templates, cofferdams and a large number of local reinforcement structures. Compared with ordinary steel plate reinforcement, it can reduce a lot of structural steel and on-site welding operations. The corrugated steel plates are bolted together, and the sleeve assembly is convenient. It is also applicable to special underwater operations.

[0023] 2. The square corrugated steel sleeve of the present invention has a zinc-plated layer and a dense oxide film on its surface, which provides good anti-corrosion capability for the reinforced RC column, and can achieve maintenance-free operation during the service life, directly reducing maintenance costs.

[0024] 3. The square corrugated steel sleeve of the present invention provides radial constraint. Combined with the good interlocking effect of the corrugated steel plate itself, the reinforcing layer grout and the square corrugated steel sleeve maintain good synergy, which can prevent the reinforcing layer concrete from cracking or even peeling off during the building's use, and avoid the problem of frequent inspections.

[0025] 4. The corrugated steel plate of this invention hardly bears axial force, but has a significant restraint effect, which can greatly improve the compressive strength of the core concrete. Therefore, when used for reinforcement, it is not necessary to increase the cross section to achieve the repair effect. Furthermore, due to the increase in the ultimate strain of the core concrete, the strain and stress of the grouting material in the reinforcement layer can reach a high level.

[0026] 5. The galvanized corrugated steel plate of this invention has high lateral stiffness, good durability, and quick construction. It can be used to strengthen and renovate reinforced concrete columns, thereby improving mechanical properties and durability at the same time and reducing the secondary stress problem of the reinforcement layer. Attached Figure Description

[0027] The invention will now be further described with reference to the accompanying drawings.

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the cross-section of the reinforced concrete column body in this invention;

[0030] Figure 3 This is a schematic diagram of the molding process of the grouting material in this invention;

[0031] Figure 4 This is a schematic diagram of the connection between the flange plate and the corrugated steel plate in this invention;

[0032] Figure 5 This is a schematic diagram of the connection between the present invention and the floor slab;

[0033] Figure 6 This is a schematic diagram of the connection method between the reinforcing plate and the angle steel in this invention;

[0034] Figure 7 This is a schematic diagram of the connection between the present invention and the reinforced concrete beam;

[0035] Figure 8 This is a schematic diagram of the connecting frame inside the square corrugated steel sleeve in this invention;

[0036] Figure 9 These are cross-sectional views of the connecting frame and partial structural cross-sectional views of the circular tube in this invention.

[0037] Figure 10 yes Figure 9 Enlarged view of point A;

[0038] Figure 11 yes Figure 10 Enlarged view of point B;

[0039] Figure 12 yes Figure 9 Enlarged view of point C;

[0040] Figure 13 This is a flowchart of the method in this invention.

[0041] In the diagram: 1. Reinforced concrete column body; 2. Corrugated steel plate; 3. Angle steel; 4. Flange plate; 5. Grouting material; 6. Floor slab; 7. Reinforced concrete beam; 8. Fixing plate; 9. Connecting frame; 10. Cavity; 11. Circular pipe; 12. Pressure plate; 13. Electric telescopic rod; 14. Heating wire; 15. Connector; 16. Feed pipe; 17. Sealing block; 18. Connecting plate; 19. Arc plate; 20. Air inlet; 21. Unblocking block; 22. Circular ring; 23. Clearance groove; 24. Magnetic block; 25. Disc; 26. Air guide hole; 27. Sealing block; 28. Slot; 29. ​​Locking rod; 30. Rotating shaft; 31. Connecting line; 32. Connecting groove; 33. Drive rod; 34. Elastic block; 35. Sealing plate; 36. Slide groove; 37. Through hole; 38. Liquid inlet pipe. Detailed Implementation

[0042] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0043] Example 1: As Figures 1 to 7As shown in the embodiment of the present invention, a reinforcement structure for a reinforced concrete column reinforced with a square corrugated steel sleeve includes a reinforced concrete column body 1, a set of corrugated steel plates 2, a set of angle steels 3, a set of flange plates 4, a floor slab 6, and a reinforced concrete beam 7. The corrugated steel plates 2 are welded to the angle steels 3 and the flange plates 4, and the angle steels 3 are bolted to the flange plates 4 to form a square corrugated steel sleeve that wraps around the reinforced concrete column body 1. Grouting material 5 is poured between the reinforced concrete column body 1 and the corrugated steel sleeve. The ends of the angle steels 3 are welded to the... Fixed plate 8 is installed, and then anchor bolts are driven in to connect fixed plate 8 to floor slab 6. Reinforced concrete beam 7 is connected to floor slab 6. The present invention uses a square corrugated steel sleeve composed of angle steel 3, flange plate 4 and corrugated steel plate 2. The square corrugated steel sleeve has a large local rigidity, which eliminates the need for construction formwork, cofferdam and a large number of local reinforcement structures. Compared with ordinary steel plate reinforcement, it can reduce a lot of structural steel and on-site welding operations. The corrugated steel plate 2 is bolted together, and the sleeve assembly is convenient. It is also applicable to special underwater operations.

[0044] The square corrugated steel sleeve includes multiple angle steels 3 and multiple flange plates 4. The corrugated steel plate 2 is connected to the angle steels 3 and flange plates 4 by welding. This arrangement facilitates the connection of the corrugated steel plate 2.

[0045] An angle steel 3 is welded to one end of the corrugated steel plate 2, and a flange plate 4 is welded to the other end. Holes are pre-drilled along the length of the angle steel 3 and the flange plate 4 at the troughs of the corrugated steel. The corrugated steel plate 2 is connected by bolts passing through the angle steel 3 and the flange plate 4. This arrangement facilitates construction and ensures connection strength.

[0046] The bolts are arranged at the troughs of the corrugated steel plate 2. This arrangement allows the bolts to be arranged along the flange plate 4 or the angle steel 3 along the mid-span. When connected, the bolts are subjected to external loads more evenly, and it is also beneficial for wrench tightening operations.

[0047] Bolts are arranged at the troughs of the second corrugation of the corrugated steel plate, with the bolt spacing being n times the corrugation length. This arrangement allows for the addition or reduction of the number of bolts as needed, facilitating the design process.

[0048] The interlayer between the reinforced concrete column body 1 and the corrugated steel plate 2 uses high-strength grout 5. With this configuration, the compressive strength can reach over 30-60 MPa in 1-3 days and 60-120 MPa in 28 days.

[0049] Grouting material 5 is injected into the interlayer. This configuration allows for different thicknesses of grouting material 5 to reinforce the reinforced concrete column body 1 with varying degrees of damage, thereby achieving the required mechanical performance.

[0050] Corrugated steel plate 2 is made of cold-formed galvanized steel sheet, with steel grades of Q235, Q345, Q390, or Q420. This configuration allows for selection of steel grades based on actual needs.

[0051] Corrugated steel plate 2 is galvanized corrugated steel plate 2. This design provides excellent corrosion resistance for the reinforced RC column, enabling maintenance-free operation during its service life and directly reducing maintenance costs.

[0052] The square corrugated steel sleeve is made of corrugated steel plate 2. This design provides high lateral stiffness, good durability, and quick construction.

[0053] Corrugated steel plate 2 is galvanized corrugated steel plate 2. This design provides excellent corrosion resistance for the reinforced RC column, enabling maintenance-free operation during its service life and directly reducing maintenance costs.

[0054] Steel plates are welded to the ends of angle steel 3, and then anchor bolts are driven in to connect it to the floor slab 6.

[0055] Galvanized corrugated steel plates 2 are manufactured in a factory to a fixed length and transported to the construction site. The corrugated steel plates 2 are spliced ​​at the designated positions and connected on-site with bolts to form a square corrugated steel plate sleeve. Then, grout 5 is poured between the square corrugated steel plate sleeve and the reinforced concrete column body 1. After being vibrated and compacted, it is cured to form the present invention.

[0056] Example 2: Figures 8 to 13 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: a connecting frame 9 is bolted to the inner wall of the corrugated steel plate 2 near the top surface. A cavity 10 is opened in the connecting frame 9. A set of heating wires 14 is arranged in the cavity 10. A pressure plate 12 is slidably connected to the inner wall of the cavity 10. An electric telescopic rod 13 is fixedly connected to the top surface of the connecting frame 9 through a bracket. The output end of the electric telescopic rod 13 is slidably connected to the top surface of the connecting frame 9, and the bottom surface of the output end is fixedly connected to the pressure plate 12.

[0057] The cavity 10 is connected to multiple sets of circular tubes 11, and multiple sets of circular holes are opened on the surface of the circular tubes 11. A sealing mechanism for sealing the circular holes is provided on the circular tubes 11.

[0058] The top surface of the connecting frame 9 is fixedly connected to a connector 15, and the bottom surface of the connector 15 is connected to a feed pipe 16.

[0059] After pouring the grout 5, it needs to solidify to achieve the desired structural effect. The solidification process of the grout 5 involves the gradual evaporation of its internal moisture, causing the cement particles to gradually bond together and form a solid structure. However, the natural solidification efficiency of the grout 5 is often slow, mainly due to the influence of ambient temperature, humidity, and the composition of the grout 5 itself. In environments with low temperature or high humidity, the solidification speed of the grout 5 will be significantly slowed down, and it may even fail to solidify properly. This slow solidification speed will have an adverse effect on the reinforced concrete column body 1. First, it will lead to an extension of the construction period and increase project costs. Because the next construction operation can only proceed after the grout 5 has solidified, a longer solidification time will consume more construction time. Second, the slow solidification speed may also affect the performance of the reinforced concrete column body 1. If the grout 5 cannot form a solid structure in time during the solidification process, it will have a certain impact on the overall strength of the column.

[0060] This invention utilizes an external grouting pipe connected to a connector to inject grout 5 into the space between the reinforced concrete column body 1 and the corrugated steel plate 2 via the feed pipe 16. After injection, the heating wire 14 is activated to heat the gas in the cavity 10. Then, the output end of the electric telescopic rod 13 moves back and forth, thereby driving the pressure plate 12 to move back and forth. At this time, the pressure plate 12 pushes the hot gas in the cavity 10 into the circular pipe 11. The sealing mechanism is then opened, and the hot gas is sprayed out from the circular hole onto the grout 5, thereby heating the grout 5 and improving its solidification efficiency.

[0061] The sealing mechanism includes a sealing block 17 that is slidably connected to the inner wall of the circular hole. The sealing block 17 has an opening on the side near the circular tube 11. A connecting plate 18 is fixedly connected to the port of the sealing block 17. An air inlet 20 is provided on the connecting plate 18. An arc-shaped plate 19 is twisted to the side of the connecting plate 18 near the outer wall of the circular tube 11 by a torsion spring. The arc-shaped plate 19 is used to seal the air inlet 20. A set of circular grooves communicating with the inside of the sealing block 17 are provided on the side wall. The inner wall of the circular hole can seal the circular grooves. An elastic element is provided between the side wall of the sealing block 17 and the side wall of the circular tube 11.

[0062] When the pressure plate 12 compresses the gas in the cavity 10, the gas enters the circular tube 11. The gas first pushes the arc plate 19, and then the gas enters the sealing block 17 through the air inlet 20, causing the sealing block 17 to move. At this time, the circular groove will be misaligned with the circular hole. Then, hot gas is sprayed out from the circular groove to heat the grout 5. When the pressure plate 12 rises, the elastic element will drive the sealing block 17 to reset. At the same time, the arc plate 19 will also reset to seal the air inlet 20. During the movement of the sealing block 17, some of the grout 5 will enter the sealing block 17 from the circular groove, but it will be blocked by the arc plate 19 to prevent it from entering the circular tube 11. When the pressure plate 12 compresses the gas in the cavity 10 again, the gas will enter the sealing block 17 and then push the grout 5 that has entered the sealing block 17 out of the circular groove. The above mechanism can prevent the grout 5 from entering the circular tube 11 through the circular hole during the heating process of the hot gas, thus preventing unnecessary waste.

[0063] A movable groove is provided near the circular hole of the circular tube 11. A slidable block 21 for unblocking the circular hole is slidably connected in the movable groove. The top surface of the slidable block 21 is inclined. Since there are various mixtures in the grout 5, these mixtures enter the circular groove, causing blockage. This affects the hot air ejected from the circular groove to heat the grout 5. When the sealing block 17 is pushed to move, the inner wall of the circular groove pushes the inclined surface of the slidable block 21, causing the slidable block 21 to enter the movable groove. When the slidable block 21 is reset, the circular groove will align with the slidable block 21. At this time, the spring will push the slidable block 21 to seal the circular groove, preventing blockage and ensuring that the hot air can be discharged normally from the circular groove, thereby improving the stability of heating the grout 5.

[0064] A circular ring 22 is slidably connected to the side wall of the circular tube 11. An avoidance groove 23 for the sealing block 17 is opened on the inner wall of the circular ring 22. A magnetic block 24 is fixedly connected to the inner side wall of the avoidance groove 23. The magnetic block 24 and the sealing block 17 are magnetically attracted. A disk 25 that is magnetically attracted to the magnetic block 24 is slidably connected inside the circular tube 11. A vent hole 26 is opened at the center of the disk 25. A sealing component is provided inside the vent hole 26. A liquid inlet pipe 38 is connected inside the cavity 10. The pressure plate 12 and the surface of the liquid inlet pipe 38 are slidably connected in a sealing manner.

[0065] In this invention, when the grout 5 is injected from the feed pipe 16 between the reinforced concrete column body 1 and the corrugated steel plate 2, the grout 5 will gradually rise. At this time, the ring 22 will be located above the grout 5. At the same time as the grout 5 is injected, the fast-setting agent can be injected from the liquid inlet pipe 38 into the cavity 10 and then flow into the circular pipe 11. When the ring 22 rises with the grout 5, the ring 22 will drive the disc 25 to push the fast-setting agent in the circular pipe 11. Then, when the ring 22 moves to the sealing block 17, the magnetic block 24 will be magnetically attracted to the sealing block 17. At this time, the circular groove will be misaligned with the circular hole, so that the fast-setting agent flows from the circular groove onto the grout 5, thereby further improving the setting speed of the grout 5 and speeding up the project progress. After the grout 5 is injected, the disc 25 will move to the top of the circular pipe 11. At this time, the sealing component can be opened and the air guide hole 26 will no longer be sealed. At this time, the hot air in the cavity 10 can enter the circular pipe 11 from the air guide hole 26.

[0066] The sealing assembly includes a connecting groove 32 formed inside the disc 25 and communicating with the air guide hole 26. The connecting groove 32 is L-shaped. The inner wall of the connecting groove 32 is torsionally connected to a rotating shaft 30 by a torsion spring. A connecting line 31 is fixedly connected to the surface of the rotating shaft 30. A locking rod 29 is slidably connected to the horizontal end of the connecting groove 32. A sealing block 27 is slidably connected to the inner wall of the air guide hole 26. A first elastic rope is fixedly connected between the top surface of the sealing block 27 and the inner wall of the air guide hole 26. A locking groove 28 is formed on the side wall of the sealing block 27 to engage with the locking rod 29. An elastic element is provided between the side of the sealing block 17 near the rotating shaft 30 and the inner wall of the connecting groove 32. A drive rod 33 is fixedly connected to the side wall of the round tube 11 near the top surface by a bracket. The drive rod 33 is used to push the rotating shaft 30 to rotate.

[0067] When the disc 25 moves close to the top surface of the tube 11, the drive rod 33 will push the rotating shaft 30 to rotate. At this time, the connecting wire 31 will be wound around the rotating shaft 30. The connecting wire 31 will pull the locking rod 29 to disengage from the locking groove 28. When the gas in the cavity 10 enters the tube 11, the gas will push the sealing block 27, causing the sealing block 27 to disengage from the air guide hole 26. At this time, the gas in the cavity 10 can enter the tube 11 through the air guide hole 26. The above mechanism can automatically open the air guide hole 26 without affecting the gas entering the tube 11.

[0068] The connecting frame 9 has a groove 36, and a sealing plate 35 is slidably connected within the groove 36. The sealing plate 35 extends into the feed pipe 16. A second elastic rope is fixedly connected between the sealing plate 35 and the inner wall of the groove 36. A hollow elastic block 34 is fixedly connected to the bottom surface of the connecting frame 9. The inner wall of the groove 36 has a through hole 37 communicating with the elastic block 34. When the grout 5 is injected close to the top surface of the connecting frame 9, the grout 5 will squeeze the elastic block 34, causing the gas inside the elastic block 34 to enter the groove 36 through the through hole 37. At this time, the gas will push the sealing plate 35 to seal the feed pipe 16, preventing the grout 5 from continuing to be injected, thus preventing excessive grout 5 from overflowing and causing unnecessary waste.

[0069] A method for reinforcing a reinforced concrete column with a square corrugated steel sleeve, the method employing the aforementioned square corrugated steel sleeve reinforcement structure for reinforced concrete columns, and the method includes the following steps:

[0070] S1: First, inspect and clean the reinforced concrete column body 1 to ensure that there is no accumulated soil, loose concrete, or other debris on the surface. Then, measure and determine the size and location of the sleeve;

[0071] S2: Assemble the pre-made corrugated steel plate 2 along the four sides of the reinforced concrete column body 1 to form a square corrugated steel sleeve. The assembly can be done with the help of angle steel 3 and flange plate 4.

[0072] S3: After the square corrugated steel sleeve is installed, the grouting pipe is connected to the joint, and then the high-strength grouting material 5 is injected from the feed pipe 16 into the space between the reinforced concrete column body 1 and the corrugated steel plate 2.

[0073] S4: After filling the sleeve with grout 5, it is necessary to ensure that the inside of the sleeve is completely filled and that the grout 5 is in close contact with the original concrete column. Then wait for the concrete to cure and reach the design strength.

[0074] S5: After the grout 5 has fully cured, the surface is repaired and treated to improve its appearance and protective performance. Surface defects are repaired with mortar, and necessary coatings or waterproofing treatments are applied.

[0075] Through the above steps, the square corrugated steel sleeve can effectively reinforce the reinforced concrete column body 1, improving its load-bearing capacity and seismic performance.

[0076] Working principle: By connecting the grouting pipe to the joint, the grouting material 5 is injected from the feed pipe 16 into the space between the reinforced concrete column body 1 and the corrugated steel plate 2. After the injection is completed, the heating wire 14 is activated to heat the gas in the cavity 10. Then, the output end of the electric telescopic rod 13 moves back and forth, thereby driving the pressure plate 12 to move back and forth. At this time, the pressure plate 12 will push the hot air in the cavity 10 into the round pipe 11. At this time, the sealing mechanism is opened, and the hot air will be sprayed out from the round hole onto the grouting material 5, thereby heating the grouting material 5 and improving the solidification efficiency of the grouting material 5.

[0077] When the pressure plate 12 compresses the gas in the cavity 10, the gas enters the circular tube 11. The gas first pushes the arc-shaped plate 19, and then enters the sealing block 17 through the air inlet 20, causing the sealing block 17 to move. At this time, the circular groove will misalign with the circular hole. Hot gas is then ejected from the circular groove to heat the grout 5. When the pressure plate 12 rises, the elastic element will cause the sealing block 17 to reset. Simultaneously, the arc-shaped plate 19 will also reset to seal the air inlet 20. During the movement of the sealing block 17, some grout 5 will enter the sealing block 17 from the circular groove, but will be blocked by the arc-shaped plate 19 to prevent it from entering the circular tube 11. The next time the pressure plate 12 compresses the gas in the cavity 10, the gas will enter the sealing block 17 and then push the grout 5 into the sealing block 17. Grout 5 is discharged from the circular groove. The above mechanism can prevent grout 5 from entering the circular pipe 11 through the circular hole during the heating process of hot air, thus avoiding unnecessary waste. Since there are various mixtures in the grout 5, these mixtures can enter the circular groove and cause blockage, which will affect the heating of the grout 5 by the hot air spraying out of the circular groove. When the sealing block 17 is pushed to move, the inner wall of the circular groove will push the inclined surface of the unblocking block 21, so that the unblocking block 21 enters the moving groove. After the unblocking block 21 is reset, the circular groove will be aligned with the unblocking block 21. At this time, the spring will push the unblocking block 21 to seal the circular groove, preventing blockage and ensuring that the hot air can be discharged normally from the circular groove, thereby improving the stability of heating the grout 5.

[0078] In this invention, when the grout 5 is injected from the feed pipe 16 between the reinforced concrete column body 1 and the corrugated steel plate 2, the grout 5 will gradually rise. At this time, the ring 22 will be located above the grout 5. At the same time as the grout 5 is injected, the fast-setting agent can be injected from the liquid inlet pipe 38 into the cavity 10 and then flow into the circular pipe 11. When the ring 22 rises with the grout 5, the ring 22 will drive the disc 25 to push the fast-setting agent in the circular pipe 11. Then, when the ring 22 moves to the sealing block 17, the magnetic block 24 will be magnetically attracted to the sealing block 17. At this time, the circular groove will be misaligned with the circular hole, so that the fast-setting agent flows from the circular groove to the grout 5, thereby further improving the solidification speed of the grout 5 and speeding up the project progress. After the grout 5 is injected, the disc 25 will move to the top of the circular pipe 11. At this time, the sealing component can be opened and the air guide hole 26 will no longer be sealed. At this time, the hot air in the cavity 10 can enter the circular pipe 11 from the air guide hole 26.

[0079] When the disc 25 moves close to the top surface of the tube 11, the drive rod 33 will push the rotating shaft 30 to rotate. At this time, the connecting wire 31 will be wound around the rotating shaft 30. The connecting wire 31 will pull the locking rod 29 to disengage from the locking groove 28. When the gas in the cavity 10 enters the tube 11, the gas will push the sealing block 27, causing the sealing block 27 to disengage from the air guide hole 26. At this time, the gas in the cavity 10 can enter the tube 11 through the air guide hole 26. The above mechanism can automatically open the air guide hole 26 without affecting the gas entering the tube 11.

[0080] When the grout 5 is injected close to the top surface of the connecting frame 9, the grout 5 will squeeze the elastic block 34, causing the gas in the elastic block 34 to enter the slide groove 36 through the through hole 37. At this time, the gas will push the sealing plate 35 to seal the feed pipe 16. At this time, the grout 5 cannot continue to be injected, preventing the grout 5 from being injected too much and overflowing, thus causing unnecessary waste.

[0081] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0082] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0083] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reinforcement structure for reinforcing a reinforced concrete column with a square corrugated steel sleeve, comprising a reinforced concrete column body (1), a set of corrugated steel plates (2), a set of angle steel (3), a set of flange plates (4), a floor slab (6), and a reinforced concrete beam (7); characterized in that: The corrugated steel plate (2) is welded to the angle steel (3) and the flange plate (4). The angle steel (3) and the flange plate (4) are bolted together to form a square corrugated steel sleeve that is wrapped around the reinforced concrete column body (1). Grouting material (5) is poured between the reinforced concrete column body (1) and the square corrugated steel sleeve. The end of the angle steel (3) is welded with a fixing plate (8), and then anchor bolts are driven in to connect the fixing plate (8) to the floor slab (6). A reinforced concrete beam (7) is connected to the floor slab (6). The angle steel (3) and flange plate (4) have pre-reserved holes at the trough of the corrugated steel plate (2) along the length direction. The corrugated steel plate (2) is connected by bolts passing through the angle steel (3) and flange plate (4). The square corrugated steel sleeve is a spliced ​​sleeve. The corrugated steel plate (2) is a galvanized corrugated steel plate (2). The corrugated steel plate (2) has a connecting frame (9) installed on the inner wall near the top surface by bolts. A cavity (10) is opened in the connecting frame (9). A set of heating wires (14) is provided in the cavity (10). A pressure plate (12) is slidably connected to the inner wall of the cavity (10). An electric telescopic rod (13) is fixedly connected to the top surface of the connecting frame (9) by a bracket. The output end of the electric telescopic rod (13) is slidably connected to the top surface of the connecting frame (9), and the bottom surface of the output end is fixedly connected to the pressure plate (12). The cavity (10) is connected to multiple sets of circular tubes (11), and multiple sets of circular holes are opened on the surface of the circular tubes (11). A sealing mechanism for sealing the circular holes is provided on the circular tubes (11). The top surface of the connecting frame (9) is fixedly connected to a connector (15), and the bottom surface of the connector (15) is connected to a feed pipe (16). The sealing mechanism includes a sealing block (17) that is slidably connected to the inner wall of the circular hole. The sealing block (17) has an opening on one side near the circular tube (11). A connecting plate (18) is fixedly connected to the port of the sealing block (17). An air inlet (20) is provided on the connecting plate (18). An arc plate (19) is twisted to the side of the connecting plate (18) near the outer wall of the circular tube (11) by a torsion spring. The arc plate (19) is used to seal the air inlet (20). A set of circular grooves communicating with the inside of the sealing block (17) are provided on the side wall. The inner wall of the circular hole can seal the circular grooves. An elastic element is provided between the side wall of the sealing block (17) and the side wall of the circular tube (11). The circular tube (11) has a movable groove near the circular hole, and a dredging block (21) for clearing the circular hole is slidably connected in the movable groove. The top surface of the dredging block (21) is inclined. The side wall of the circular tube (11) is slidably connected to a ring (22). The inner wall of the ring (22) is provided with a clearance groove (23) for the clearance sealing block (17). The inner side wall of the clearance groove (23) is fixedly connected to a magnetic block (24). The magnetic block (24) and the sealing block (17) are magnetically attracted. The circular tube (11) is slidably connected to a disc (25) that is magnetically attracted to the magnetic block (24). The center of the disc (25) is provided with a vent hole (26). A sealing component is provided in the vent hole (26). The cavity (10) is connected to a liquid inlet pipe (38). The pressure plate (12) is slidably connected to the surface of the liquid inlet pipe (38).

2. The reinforcement structure for reinforced concrete columns reinforced with square corrugated steel sleeves according to claim 1, characterized in that: The sealing assembly includes a connecting groove (32) formed inside the disc (25) and communicating with the air guide hole (26). The connecting groove (32) is L-shaped. A rotating shaft (30) is twisted to the inner wall of the connecting groove (32) by a torsion spring. A connecting line (31) is fixedly connected to the surface of the rotating shaft (30). A locking rod (29) is slidably connected to the horizontal end of the connecting groove (32). A sealing block (27) is slidably connected to the inner wall of the air guide hole (26). A first elastic rope is fixedly connected between the top surface of (27) and the inner wall of the air guide hole (26). The side wall of the sealing block (27) is provided with a slot (28) for engaging with the locking rod (29). An elastic element is provided between the side of the sealing block (17) near the rotating shaft (30) and the inner wall of the connecting groove (32). The side wall of the round tube (11) near the top surface is fixedly connected to a drive rod (33) by a bracket. The drive rod (33) is used to push the rotating shaft (30) to rotate.

3. The reinforcement structure for reinforced concrete columns reinforced with square corrugated steel sleeves according to claim 2, characterized in that: The connecting frame (9) has a sliding groove (36) inside, and a sealing plate (35) is slidably connected inside the sliding groove (36). The sealing plate (35) extends into the feed pipe (16). A second elastic rope is fixedly connected between the sealing plate (35) and the inner wall of the sliding groove (36). A hollow elastic block (34) is fixedly connected to the bottom surface of the connecting frame (9). A through hole (37) communicating with the elastic block (34) is opened on the inner wall of the sliding groove (36).

4. A method for reinforcing a reinforced concrete column with a square corrugated steel sleeve, the method employing the reinforcement structure for reinforcing a reinforced concrete column with a square corrugated steel sleeve as described in claim 3, characterized in that: The method includes the following steps: S1: First, inspect and clean the reinforced concrete column body (1) to ensure that there is no soil, loose concrete or other debris on the surface, and then measure and determine the size and position of the sleeve; S2: The pre-made corrugated steel plate (2) is assembled along the four sides of the reinforced concrete column body (1) to form a square corrugated steel sleeve, and the assembly is aided by angle steel (3) and flange plate (4). S3: After the square corrugated steel sleeve is installed, the grouting pipe is connected to the joint, and then the high-strength grout (5) is injected from the feed pipe (16) between the reinforced concrete column body (1) and the corrugated steel plate (2).

5. The method for reinforcing a reinforced concrete column with a square corrugated steel sleeve according to claim 4, characterized in that: The method also includes the following steps: S4: After filling the grout (5), it is necessary to ensure that the inside of the sleeve is full and that the grout (5) is in close contact with the original concrete column, and then wait for the concrete to cure and reach the design strength. S5: After the grout (5) has fully cured, the surface is repaired and treated to improve its aesthetics and protective properties. Surface defects are repaired with mortar and necessary coatings or waterproofing are applied.

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