Reinforcing structure and method for increasing section of reinforced concrete beam through prefabricated assembly type assembly

Abstract

The invention relates to the technical field of civil engineering structure reinforcing, in particular to a reinforcing structure and method for increasing the section of a reinforced concrete beam through a prefabricated assembly type assembly. Prefabricated assemblies applying longitudinal prestress are adopted in the field of building structure reinforcement for section increasing reinforcement for the first time, the reinforcement assemblies are produced in an industrialized mode, the construction quality of the section increasing reinforcement assemblies is guaranteed, the construction efficiency is improved, on-site wet operation is greatly reduced, formworks are saved, the manufacturing cost is reduced, and the construction period is shortened. Meanwhile, the advantages of energy conservation and environmental protection are achieved; prestress applied in the prefabrication and assembly stages effectively reduces the stress lag problem of the reinforcing assembly, cooperative work of the reinforcing assembly and a reinforced structure is achieved, the performance of reinforcing materials is fully exerted, and the purpose of saving materials is achieved; the application of the method can effectively improve the efficiency of a traditional reinforcing method for increasing the cross section and reduce the manufacturing cost.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering structure reinforcement, and in particular to a prefabricated assembled component reinforcement structure and method for increasing the cross-section of a reinforced concrete beam. Background Art

[0002] The method of increasing the cross-section of reinforced concrete structures is the most effective and direct reinforcement method. Its advantage is that it can significantly improve the structural bearing capacity, deformation, durability and fire resistance. However, the method of increasing the cross-section of concrete structures usually requires formwork and wet concrete pouring, which has a long construction period and a great impact on production and the environment. At the same time, the reinforcement construction also requires sufficient working space. The increase in cross-section is usually reinforced under load, and the increase in cross-section structure has problems such as stress lag.

[0003] With the advancement of technology, the application and development of prefabricated structures in engineering structures is progressing steadily. Prefabricated prefabricated components have great advantages over on-site components: first, they have a good construction and maintenance environment; second, prefabricated assembly parts adopt assembly-line operation, which is convenient for construction and the construction quality of components with larger cross-sections can be easily guaranteed; finally, prefabricated parts save on-site wet operation procedures, greatly reducing the difficulty of construction, saving construction period and cost. The application of prefabricated assembly parts in engineering structure reinforcement is more in line with the development direction of building industrialization and industrialization.

[0004] At present, existing technologies attempt to use prestressed technology and new steel wire rope materials to improve construction processes in structural reinforcement, reduce stress lag and other existing problems, but most research is still in the experimental research stage; research and application of prefabricated assembly technology in structural reinforcement is even rarer. Summary of the invention

[0005] The technical problem to be solved by the present invention is: to provide a prefabricated assembled component to increase the cross-section of reinforced concrete beams and a reinforcement structure and method. By closely combining the assembled prefabricated parts with the structural reinforcement, adopting on-site assembly and applying transverse prestressing, the newly increased cross-section can be subjected to force synergistically with the existing concrete beam cross-section, thereby achieving the purpose of reinforcing the concrete beam cross-section to improve the bearing capacity and stiffness of the reinforced concrete beam.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] 1. A prefabricated assembly to increase the cross-section of reinforced concrete beams and strengthen the structure

[0008] The present invention provides a prefabricated assembly type component to increase the cross-section of a reinforced concrete beam reinforcement structure, comprising a reinforced concrete beam 1, wherein the reinforced concrete beam 1 is arranged below a structural floor 2 between two concrete frame columns 3, and the reinforced concrete beam 1 is reinforced and installed below the structural floor 2 by a prefabricated reinforced concrete reinforcement component 4, wherein the prefabricated reinforced concrete reinforcement component 4 comprises a U-shaped sleeve 7 for a steel wire rope hoop reserved at the bottom of the reinforced concrete beam 1, and the steel wire rope hoop reserved A plurality of prestressed reinforcing longitudinal bars 5 are arranged along the beam direction between the U-shaped sleeve 7 and the bottom of the reinforced concrete beam 1 and concrete is poured therein to increase the cross-section of the reinforced concrete beam. A prestressed U-shaped steel wire rope hoop 6 is inserted into the reserved U-shaped sleeve 7 for the steel wire rope hoop. Both ends of the prestressed U-shaped steel wire rope hoop 6 are connected to corresponding steel wire rope U-shaped hoop single-head fastening anchor bolts 9 through steel wire rope U-shaped hoop pressing sleeve fasteners 8. The steel wire rope U-shaped hoop single-head fastening anchor bolts 9 are anchored on the structural floor 2.

[0009] Furthermore, the two ends of the prestressed reinforcing longitudinal reinforcement 5 are respectively fixedly connected to the frame column anchoring hoop plates 16 provided on the two concrete frame columns 3, and the frame column anchoring hoop plates 16 are fixedly installed on the concrete frame column 3 at a position flush with the prestressed reinforcing longitudinal reinforcement 5 through a plurality of anchor bolts 17.

[0010] Furthermore, both ends of the prestressed longitudinal reinforcement bars 5 are anchored to corresponding prestressed longitudinal bar anchoring end plates 13 through prestressed longitudinal bar anchoring pieces 14 .

[0011] Furthermore, the prestressed longitudinal reinforcement anchor end plates 13 are fixedly connected to the corresponding frame column anchor hoop plates 16 via the reinforced longitudinal reinforcement anchor connection plates 15 .

[0012] Furthermore, a plurality of fixing holes are orderly opened on the structural floor 2, and the opening positions of the fixing holes are adapted to the spacing and size specifications of the reserved U-shaped sleeves 7 of the wire rope hoop.

[0013] Furthermore, after the prestressed U-shaped wire rope hoop 6 passes through the reserved U-shaped sleeve 7 of the wire rope hoop, both ends are fixedly connected with the corresponding wire rope U-shaped hoop single-head fastening anchor bolt 9 through the wire rope U-shaped hoop pressing sleeve fastener 8, and the wire rope U-shaped hoop single-head fastening anchor bolt 9 is anchored in the corresponding fixing hole through the fastening nut 10.

[0014] Furthermore, the single-head fastening anchor bolts 9 of the U-shaped wire rope hoop corresponding to the two ends of the prestressed U-shaped wire rope hoop 6 pass through the fixing holes and are connected through the U-shaped wire rope hoop anchoring end plate 12, and a nut gasket 11 is provided between the fastening nut 10 and the U-shaped wire rope hoop anchoring end plate 12.

[0015] Furthermore, the concrete poured between the reserved U-shaped sleeve 7 of the wire rope hoop and the reinforced concrete beam 1 is adhered and fixed to the bottom of the reinforced concrete beam 1 by structural adhesive 18.

[0016] 2. A method for strengthening reinforced concrete beams by using prefabricated assembly components to increase the cross-section

[0017] Based on the same inventive concept, the present invention also provides a method for reinforcing a reinforced concrete beam by increasing the cross-section of a prefabricated assembly, based on the reinforcement structure described above, specifically comprising the following steps:

[0018] S1, prefabrication of reinforcement components: according to the size of the reinforced concrete beam 1, the prefabricated reinforced concrete reinforcement components 4 are processed and manufactured in advance in the factory;

[0019] S2, reinforcement component layout and structural floor drilling: after the prefabricated reinforced concrete reinforcement component 4 is transported to the site, the site layout is performed according to the position of the prestressed reinforcement longitudinal reinforcement 5 and the reserved U-shaped sleeve 7 of the wire rope hoop in the reinforcement component, and fixed holes are drilled on the structural floor 2 according to the spacing and size specifications of the reserved U-shaped sleeve 7 of the wire rope hoop;

[0020] S3, roughening the bottom of the concrete beam: roughening the bottom surface of the reinforced concrete beam 1 to remove deteriorated concrete and repair cracks and holes on the surface;

[0021] S4, installation of frame column anchor hoop plates: installing frame column anchor hoop plates 16 at corresponding positions on the concrete frame columns 3 according to the anchor height of the prestressed reinforcement longitudinal bars 5;

[0022] S5, installation of prestressed U-shaped wire rope hoop: clean the debris in the reserved U-shaped sleeve 7 of the wire rope hoop, and pass the prestressed U-shaped wire rope hoop 6 through the corresponding reserved U-shaped sleeve 7 of the wire rope hoop;

[0023] S6, brushing structural adhesive on the bonding surface: brushing structural adhesive 18 on the bonding surface of the prefabricated reinforced concrete reinforcement component 4 and the reinforced concrete beam 1, and evenly pressing the prefabricated reinforced concrete reinforcement component 4 to make it fit tightly with the reinforced concrete beam 1 until the structural adhesive 18 overflows, and fixing the prefabricated reinforced concrete reinforcement component 4 with a temporary supporting member;

[0024] S7, anchoring of prestressed U-shaped steel wire rope hoop: after the structural adhesive 18 is completely cured, the prestressed U-shaped steel wire rope hoop 6 is tensioned by the single-head fastening anchor bolt 9 of the steel wire rope U-shaped hoop, and then the prestressed U-shaped steel wire rope hoop 6 is passed through the two ends of the reserved U-shaped sleeve 7 of the steel wire rope hoop and through the corresponding fixing holes on the structural floor 2 and then anchored to the floor surface, and the temporary supporting member is removed;

[0025] S8, connecting the prestressed longitudinal reinforcement anchor end plate and the frame column anchor hoop plate: anchor the two ends of the prestressed reinforcement longitudinal reinforcement 5 to the corresponding prestressed longitudinal reinforcement anchor end plate 13, and fix the prestressed longitudinal reinforcement anchor end plate 13 to the corresponding frame column anchor hoop plate 16 through the reinforcement longitudinal reinforcement anchor connecting plate 15.

[0026] Among them, when the prefabricated reinforced concrete reinforcement component 4 is in the factory, the multiple prestressed reinforcing longitudinal bars 5 are first tensioned and fixed to the prestressed longitudinal bar anchoring end plates 13 at both ends, and then the reserved U-shaped sleeve 7 of the wire rope hoop is tied to the prestressed longitudinal reinforcing bar 5, and finally concrete pouring and maintenance are carried out.

[0027] Compared with the prior art, the present invention has the following main advantages:

[0028] 1. The present invention provides a prefabricated assembly component to increase the reinforced concrete beam cross-section reinforcement structure and method. By closely combining the prefabricated components with the structural reinforcement, using on-site assembly and applying transverse prestress, the newly increased cross-section can be subjected to force in coordination with the existing concrete beam cross-section, thereby achieving the purpose of strengthening the concrete beam cross-section to improve the bearing capacity and stiffness of the reinforced concrete beam;

[0029] 2. The present invention is the first in the field of building structure reinforcement to use prefabricated components with longitudinal prestress to increase cross-section reinforcement. The reinforcement components are factory-produced, which not only ensures the construction quality of the increased cross-section reinforcement components, but also improves the construction efficiency, greatly reduces on-site wet work, saves templates, construction costs and construction period, and also has the advantages of energy saving and environmental protection;

[0030] 3. The prestress applied during the prefabrication and assembly stages of the present invention effectively reduces the stress lag problem of the reinforcement components, enables the reinforcement components to work in coordination with the reinforced structure, gives full play to the performance of the reinforcement materials, and achieves the purpose of saving materials; the application of this method will effectively improve the efficiency of traditional cross-section enlargement reinforcement methods and reduce construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is an elevation view of a reinforced concrete beam cross-section reinforcement structure enlarged by a prefabricated assembly in an embodiment of the present invention;

[0032] Figure 2 for Figure 1 AA section view in;

[0033] Figure 3 for Figure 1 BB section diagram in;

[0034] Figure 4 for Figure 1 CC profile in ;

[0035] Figure 5 for Figure 1 DD profile in;

[0036] Figure 6 is a cross-sectional view of a prefabricated reinforced concrete reinforcement assembly in an embodiment of the present invention;

[0037] Figure 7 It is a schematic diagram of parts of a prestressed U-shaped steel wire rope clamp in an embodiment of the present invention;

[0038] Figure 8 The present invention is a flowchart of a method for reinforcing a reinforced concrete beam by using prefabricated assembled components in an embodiment of the present invention.

[0039] In the figure: 1. reinforced concrete beam; 2. structural floor; 3. concrete frame column; 4. prefabricated reinforced concrete reinforcement assembly; 5. prestressed reinforcing longitudinal reinforcement; 6. prestressed U-shaped wire rope clamp; 7. reserved U-shaped sleeve for wire rope clamp; 8. wire rope U-shaped clamp fastener; 9. single-head fastening anchor bolt for wire rope U-shaped clamp; 10. fastening nut; 11. nut gasket; 12. wire rope U-shaped clamp anchor end plate; 13. prestressed longitudinal reinforcement anchor end plate; 14. prestressed longitudinal reinforcement anchor; 15. reinforced longitudinal reinforcement anchor connection plate; 16. frame column anchor hoop plate; 17. anchor bolt; 18. structural adhesive. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] It should be pointed out that, according to the needs of implementation, the various steps / components described in this application can be split into more steps / components, and two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present invention.

[0042] Embodiment 1: This embodiment provides a prefabricated assembly to increase the cross-section of a reinforced concrete beam and strengthen the structure. Figures 1 to 7 As shown, it mainly includes: reinforced concrete beam 1, structural floor slab 2, concrete frame column 3 and prefabricated reinforced concrete reinforcement component 4;

[0043] The reinforced concrete beam 1 is arranged below the structural floor 2 between two concrete frame columns 3. The reinforced concrete beam 1 is reinforced and installed below the structural floor 2 through a prefabricated reinforced concrete reinforcement component 4. The prefabricated reinforced concrete reinforcement component 4 includes a wire rope hoop reserved U-shaped sleeve 7 arranged at the bottom of the reinforced concrete beam 1. A plurality of prestressed reinforcing longitudinal bars 5 are arranged along the beam direction between the wire rope hoop reserved U-shaped sleeve 7 and the bottom of the reinforced concrete beam 1 and poured with concrete to increase the cross-section of the reinforced concrete beam. A prestressed U-shaped wire rope hoop 6 is inserted into the wire rope hoop reserved U-shaped sleeve 7. Both ends of the prestressed U-shaped wire rope hoop 6 are connected to corresponding wire rope U-shaped hoop single-head fastening anchor bolts 9 through wire rope U-shaped hoop pressing sleeve fasteners 8. The wire rope U-shaped hoop single-head fastening anchor bolts 9 are anchored on the structural floor 2.

[0044] Furthermore, the two ends of the prestressed reinforcing longitudinal reinforcement 5 are respectively fixedly connected to the frame column anchoring hoop plates 16 provided on the two concrete frame columns 3, and the frame column anchoring hoop plates 16 are fixedly installed on the concrete frame column 3 at a position flush with the prestressed reinforcing longitudinal reinforcement 5 through a plurality of anchor bolts 17.

[0045] Furthermore, both ends of the prestressed longitudinal reinforcement bars 5 are anchored to corresponding prestressed longitudinal bar anchoring end plates 13 through prestressed longitudinal bar anchoring pieces 14 .

[0046] Furthermore, the prestressed longitudinal reinforcement anchor end plates 13 are fixedly connected to the corresponding frame column anchor hoop plates 16 via the reinforced longitudinal reinforcement anchor connection plates 15 .

[0047] Furthermore, a plurality of fixing holes are orderly opened on the structural floor 2, and the opening positions of the fixing holes are adapted to the spacing and size specifications of the reserved U-shaped sleeves 7 of the wire rope hoop.

[0048] Furthermore, after the prestressed U-shaped wire rope hoop 6 passes through the reserved U-shaped sleeve 7 of the wire rope hoop, both ends are fixedly connected with the corresponding wire rope U-shaped hoop single-head fastening anchor bolt 9 through the wire rope U-shaped hoop pressing sleeve fastener 8, and the wire rope U-shaped hoop single-head fastening anchor bolt 9 is anchored in the corresponding fixing hole through the fastening nut 10.

[0049] Furthermore, the single-head fastening anchor bolts 9 of the U-shaped wire rope hoop corresponding to the two ends of the prestressed U-shaped wire rope hoop 6 pass through the fixing holes and are connected through the U-shaped wire rope hoop anchoring end plate 12, and a nut gasket 11 is provided between the fastening nut 10 and the U-shaped wire rope hoop anchoring end plate 12.

[0050] Furthermore, the concrete poured between the reserved U-shaped sleeve 7 of the wire rope hoop and the reinforced concrete beam 1 is adhered and fixed to the bottom of the reinforced concrete beam 1 by structural adhesive 18.

[0051] Embodiment 2: This embodiment provides a prefabricated assembly type component to increase the cross-section of reinforced concrete beams to strengthen the structure, which adopts a reinforcement method in which the components for increasing the cross-section are prefabricated in the factory and assembled on site. The factory prefabricates the components for increasing the cross-section of reinforced concrete beams according to the design requirements, including the installation, tensioning and anchoring of the longitudinal reinforcement in the components for increasing the cross-section, the pre-embedding of the steel wire rope hoop sleeve, and the pouring and maintenance of concrete. During the prefabrication of the components for increasing the cross-section, the site cooperates to prepare for the installation of the prefabricated components. This includes roughening and repairing the surface of the reinforced beam, pre-drilling holes in the top floor of the beam according to the setting of the total steel wire rope U-shaped hoop of the reinforced prefabricated component, and the installation of the steel hoop plate connecting the prefabricated component and the frame column. The prefabricated concrete reinforcement components are transported to the project site after reaching the design strength. Before installing the reinforcement components, insert the steel wire rope U-shaped hoop into the embedded sleeve, install anchor bolts at both ends of the U-shaped steel wire rope hoop, and cover the contact surface with the reinforced beam with structural adhesive. After completing all the preparations, lift the prefabricated components to a position near the bottom of the beam, then pass all the anchor bolts at the ends of the U-shaped wire hoops through the pre-opened holes in the floor slab for preliminary tightening. After all the anchor bolts are installed in place and the structural adhesive has been completely cured, re-tighten all the anchor nuts to apply pre-tension stress to the wire hoops. The pre-tension of the wire rope hoop makes the reinforced component and the reinforced beam fit more closely and achieve common force. After the reinforced component is fixed, the longitudinal reinforcement anchor plate at the end of the reinforced component is reliably welded to the rear anchor plate on the frame column using a connecting plate to ensure reliable force transmission of the longitudinal reinforcement at the bottom of the beam.

[0052] Specifically, the prefabricated reinforcement components 4 are processed and manufactured in the factory in advance according to the design. The prefabricated reinforcement components 4 are a group, including concrete, reinforced prestressed longitudinal reinforcements 5 and sleeves. During the factory production, the prestressed reinforced longitudinal reinforcements 5 are first tensioned and then fixed. The tensioning of the longitudinal reinforcements effectively reduces the problem of stress lag of the reinforced longitudinal reinforcements during the force process. Then the steel wire rope hoop is reserved and tied to the U-shaped sleeve 7 on the prestressed reinforced longitudinal reinforcement 5, and the concrete is poured and maintained normally.

[0053] Furthermore, after the prefabricated components are delivered to the site, the on-site layout is carried out according to the positions of the longitudinal reinforcement and stirrups in the prefabricated components, and holes are drilled in the structural floor 2 according to the reserved sleeve spacing and specifications in the prefabricated components for the U-shaped hoop compression sleeve fastener 8 to pass through and fix; on the frame column, the frame column anchor hoop plate 16 is set along the surface of the concrete frame column 3 at the corresponding position of the prefabricated reinforcement longitudinal reinforcement, and the frame column anchor hoop plate 16 is fixed with anchor bolts 17. In addition, the bottom surface of the reinforced concrete beam 1 needs to be roughened to remove the deteriorated concrete and repair the cracks and pits on the surface.

[0054] Furthermore, the debris in the U-shaped sleeve 7 reserved for the wire rope hoop is cleaned, and after the prestressed U-shaped wire rope hoop 6 is passed through the U-shaped sleeve 7 reserved for the wire rope hoop, the anchor bolts 9 are tightened at both ends of the prestressed U-shaped wire rope hoop 6, and fixed with a compression fastener 8. After all the prestressed U-shaped wire rope hoops 6 are passed through and fixed, structural putty 18 is applied to the fitting surface between the prefabricated reinforced concrete reinforcement component 4 and the structural floor slab 2 and the surface of the prefabricated reinforced concrete reinforcement component 4.

[0055] Furthermore, the prefabricated reinforced concrete reinforcement component 4 is accurately fitted to the structural floor 2, and all the steel wire U-hoops and single-head fastening anchor bolts 9 are temporarily fixed after passing through the holes in the floor, and the prefabricated reinforced concrete reinforcement component 4 is pressed until the glue overflows slightly, and the prefabricated reinforced concrete reinforcement component 4 is temporarily fixed with a supporting member, and wait for the structural glue 18 to completely cure.

[0056] Furthermore, after the structural adhesive 18 is completely cured, the prestressed U-shaped steel wire rope hoop 6 is tensioned and locked using the fastening anchor bolts 9, and the temporary support at the bottom of the beam is removed.

[0057] Furthermore, the end anchor plates of the longitudinal reinforcement 5 in the prefabricated reinforced concrete reinforcement assembly 4 are reliably welded to the anchor steel plates of the frame columns by using connecting steel plates.

[0058] Furthermore, after completing the above steps, the entire reinforcement process is completed.

[0059] Embodiment 3, based on the same inventive concept, this embodiment also provides a method for reinforcing a reinforced concrete beam by increasing the cross-section of a prefabricated assembly, based on the reinforcement structure as described above, such as Figure 8 As shown, the specific steps include:

[0060] S1, prefabrication of reinforcement components: according to the size of the reinforced concrete beam 1, the prefabricated reinforced concrete reinforcement components 4 are processed and manufactured in advance in the factory;

[0061] S2, reinforcement component layout and structural floor drilling: after the prefabricated reinforced concrete reinforcement component 4 is transported to the site, the site layout is performed according to the position of the prestressed reinforcement longitudinal reinforcement 5 and the reserved U-shaped sleeve 7 of the wire rope hoop in the reinforcement component, and fixed holes are drilled on the structural floor 2 according to the spacing and size specifications of the reserved U-shaped sleeve 7 of the wire rope hoop;

[0062] S3, roughening the bottom of the concrete beam: roughening the bottom surface of the reinforced concrete beam 1 to remove deteriorated concrete and repair cracks and holes on the surface;

[0063] S4, installation of frame column anchor hoop plates: installing frame column anchor hoop plates 16 at corresponding positions on the concrete frame columns 3 according to the anchor height of the prestressed reinforcement longitudinal bars 5;

[0064] S5, installation of prestressed U-shaped wire rope hoop: clean the debris in the reserved U-shaped sleeve 7 of the wire rope hoop, and pass the prestressed U-shaped wire rope hoop 6 through the corresponding reserved U-shaped sleeve 7 of the wire rope hoop;

[0065] S6, brushing structural adhesive on the bonding surface: brushing structural adhesive 18 on the bonding surface of the prefabricated reinforced concrete reinforcement component 4 and the reinforced concrete beam 1, and evenly pressing the prefabricated reinforced concrete reinforcement component 4 to make it fit tightly with the reinforced concrete beam 1 until the structural adhesive 18 overflows, and fixing the prefabricated reinforced concrete reinforcement component 4 with a temporary supporting member;

[0066] S7, anchoring of prestressed U-shaped steel wire rope hoop: after the structural adhesive 18 is completely cured, the prestressed U-shaped steel wire rope hoop 6 is tensioned by the single-head fastening anchor bolt 9 of the steel wire rope U-shaped hoop, and then the prestressed U-shaped steel wire rope hoop 6 is passed through the two ends of the reserved U-shaped sleeve 7 of the steel wire rope hoop and through the corresponding fixing holes on the structural floor 2 and then anchored to the floor surface, and the temporary supporting member is removed;

[0067] S8, connecting the prestressed longitudinal reinforcement anchor end plate and the frame column anchor hoop plate: anchor the two ends of the prestressed reinforcement longitudinal reinforcement 5 to the corresponding prestressed longitudinal reinforcement anchor end plate 13, and fix the prestressed longitudinal reinforcement anchor end plate 13 to the corresponding frame column anchor hoop plate 16 through the reinforcement longitudinal reinforcement anchor connecting plate 15.

[0068] Among them, when the prefabricated reinforced concrete reinforcement component 4 is in the factory, the multiple prestressed reinforcing longitudinal bars 5 are first tensioned and fixed to the prestressed longitudinal bar anchoring end plates 13 at both ends, and then the reserved U-shaped sleeve 7 of the wire rope hoop is tied to the prestressed longitudinal reinforcing bar 5, and finally concrete pouring and maintenance are carried out.

[0069] Furthermore, all parts involved in this application that are not described in detail are the same as the prior art or are implemented using the prior art.

[0070] In summary:

[0071] 1. The present invention provides a prefabricated assembly component to increase the reinforced concrete beam cross-section reinforcement structure and method. By closely combining the prefabricated components with the structural reinforcement, using on-site assembly and applying transverse prestress, the newly increased cross-section can be subjected to force in coordination with the existing concrete beam cross-section, thereby achieving the purpose of strengthening the concrete beam cross-section to improve the bearing capacity and stiffness of the reinforced concrete beam;

[0072] 2. The present invention is the first in the field of building structure reinforcement to use prefabricated components with longitudinal prestress to increase cross-section reinforcement. The reinforcement components are factory-produced, which not only ensures the construction quality of the increased cross-section reinforcement components, but also improves the construction efficiency, greatly reduces on-site wet work, saves templates, construction costs and construction period, and also has the advantages of energy saving and environmental protection;

[0073] 3. The prestress applied during the prefabrication and assembly stages of the present invention effectively reduces the stress lag problem of the reinforcement components, enables the reinforcement components to work in coordination with the reinforced structure, gives full play to the performance of the reinforcement materials, and achieves the purpose of saving materials; the application of this method will effectively improve the efficiency of traditional cross-section enlargement reinforcement methods and reduce construction costs.

[0074] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A prefabricated assembly component to increase the cross-section of a reinforced concrete beam reinforcement structure, characterized in that: The invention comprises a reinforced concrete beam (1), wherein the reinforced concrete beam (1) is arranged below a structural floor (2) between two concrete frame columns (3), wherein the reinforced concrete beam (1) is reinforced and installed below the structural floor (2) by a prefabricated reinforced concrete reinforcement component (4), wherein the prefabricated reinforced concrete reinforcement component (4) comprises a steel wire rope hoop reserved U-shaped sleeve (7) arranged at the bottom of the reinforced concrete beam (1), wherein the steel wire rope hoop reserved U-shaped sleeve (7) is connected to the reinforced concrete beam (1) A plurality of prestressed reinforcing longitudinal bars (5) are arranged along the beam direction between the bottoms and concrete is poured to increase the cross-section of the reinforced concrete beam; a prestressed U-shaped steel wire rope hoop (6) is inserted into the reserved U-shaped sleeve (7) of the steel wire rope hoop; both ends of the prestressed U-shaped steel wire rope hoop (6) are connected to corresponding steel wire rope U-shaped hoop single-head fixing anchor bolts (9) through steel wire rope U-shaped hoop pressing sleeve fasteners (8); and the steel wire rope U-shaped hoop single-head fixing anchor bolts (9) are anchored on the structural floor slab (2).

2. A prefabricated assembly component for increasing the cross-section of reinforced concrete beams according to claim 1, characterized in that: The two ends of the prestressed reinforcing longitudinal reinforcement (5) are respectively fixedly connected to the frame column anchoring hoop plates (16) provided on the two concrete frame columns (3); the frame column anchoring hoop plates (16) are fixedly installed on the concrete frame column (3) at a position flush with the prestressed reinforcing longitudinal reinforcement (5) via a plurality of anchor bolts (17).

3. A prefabricated assembly-type reinforced concrete beam cross-section reinforcement structure according to claim 2, characterized in that: Both ends of the prestressed reinforcement longitudinal reinforcement bar (5) are anchored to corresponding prestressed longitudinal reinforcement anchoring end plates (13) through prestressed longitudinal reinforcement anchoring pieces (14).

4. A prefabricated assembly-type reinforced concrete beam cross-section reinforcement structure according to claim 3, characterized in that: The prestressed longitudinal reinforcement anchoring end plates (13) are fixedly connected to corresponding frame column anchoring hoop plates (16) via reinforcing longitudinal reinforcement anchoring connecting plates (15).

5. A prefabricated assembly-type reinforced concrete beam cross-section reinforcement structure according to claim 1, characterized in that: A plurality of fixing holes are orderly opened on the structural floor (2), and the opening positions of the fixing holes are matched with the spacing and size specifications of the reserved U-shaped sleeves (7) of the steel wire rope hoop.

6. A prefabricated assembly-type reinforced concrete beam cross-section reinforcement structure according to claim 5, characterized in that: After the prestressed U-shaped wire rope clamp (6) passes through the reserved U-shaped sleeve (7) of the wire rope clamp, both ends are fixedly connected to the corresponding single-head fastening anchor bolt (9) of the wire rope U-shaped clamp through the wire rope U-shaped clamp pressing fastener (8), and the single-head fastening anchor bolt (9) of the wire rope U-shaped clamp is anchored in the corresponding fixing hole through the fastening nut (10).

7. A prefabricated assembly-type reinforced concrete beam cross-section reinforcement structure according to claim 6, characterized in that: The steel wire rope U-shaped hoop single-head fastening anchor bolts (9) corresponding to the two ends of the prestressed U-shaped steel wire rope hoop (6) pass through the fixing holes and are connected through the steel wire rope U-shaped hoop anchoring end plates (12), and a nut gasket (11) is provided between the fastening nut (10) and the steel wire rope U-shaped hoop anchoring end plates (12).

8. A prefabricated assembly-type reinforced concrete beam cross-section reinforcement structure according to claim 1, characterized in that: The concrete poured between the reserved U-shaped sleeve (7) of the steel wire rope hoop and the reinforced concrete beam (1) is fixed to the bottom of the reinforced concrete beam (1) by means of structural adhesive (18).

9. A method for reinforcing a reinforced concrete beam by increasing the cross section of a prefabricated assembly, based on the reinforcement structure according to any one of claims 1 to 8, characterized in that: The steps include: S1, prefabrication of reinforcement components: according to the size of the reinforced concrete beam (1), the prefabricated reinforced concrete reinforcement components (4) are processed and manufactured in advance in a factory; S2, reinforcement component layout and structural floor drilling: after the prefabricated reinforced concrete reinforcement component (4) is transported to the site, the site layout is performed according to the positions of the prestressed reinforcement longitudinal bars (5) and the reserved U-shaped sleeves (7) of the wire rope hoop in the reinforcement component, and fixed holes are drilled on the structural floor (2) according to the spacing and size specifications of the reserved U-shaped sleeves (7) of the wire rope hoop; S3, roughening the bottom of the concrete beam: roughening the bottom surface of the reinforced concrete beam (1) to remove deteriorated concrete and repair cracks and holes on the surface; S4, installation of frame column anchoring hoop plates: installing frame column anchoring hoop plates (16) at corresponding positions on the concrete frame columns (3) according to the anchoring height of the prestressed reinforcement longitudinal bars (5); S5, installation of the prestressed U-shaped steel wire rope hoop: cleaning the debris in the reserved U-shaped sleeve (7) of the steel wire rope hoop, and passing the prestressed U-shaped steel wire rope hoop (6) through the corresponding reserved U-shaped sleeve (7) of the steel wire rope hoop; S6, applying structural glue on the fitting surface: applying structural glue (18) on the fitting surface between the prefabricated reinforced concrete reinforcement component (4) and the reinforced concrete beam (1), and evenly pressing the prefabricated reinforced concrete reinforcement component (4) to make it fit tightly with the reinforced concrete beam (1) until the structural glue (18) overflows, and fixing the prefabricated reinforced concrete reinforcement component (4) with a temporary supporting member; S7, anchoring the prestressed U-shaped steel wire rope hoop: after the structural adhesive (18) is completely cured, the prestressed U-shaped steel wire rope hoop (6) is tensioned by means of the single-head fastening anchor bolt (9) of the steel wire rope U-shaped hoop, and then the prestressed U-shaped steel wire rope hoop (6) is passed through the two ends of the reserved U-shaped sleeve (7) of the steel wire rope hoop and through the corresponding fixing holes on the structural floor (2) and then anchored to the floor surface, and the temporary supporting member is removed; S8, connecting the prestressed longitudinal reinforcement anchor end plate and the frame column anchor hoop plate: anchoring the two ends of the prestressed reinforcement longitudinal reinforcement (5) to the corresponding prestressed longitudinal reinforcement anchor end plate (13), and fixing the prestressed longitudinal reinforcement anchor end plate (13) to the corresponding frame column anchor hoop plate (16) through the reinforcement longitudinal reinforcement anchor connection plate (15).

10. The reinforcement method according to claim 9, characterized in that: When the prefabricated reinforced concrete reinforcement assembly (4) is in the factory, the plurality of prestressed reinforcement longitudinal bars (5) are first tensioned and fixed to the prestressed longitudinal bar anchoring end plates (13) at both ends, and then the steel wire rope hoop reserved U-shaped sleeve (7) is tied to the prestressed reinforcement longitudinal bars (5), and finally concrete pouring and curing are carried out.

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