Fabricated built-in reinforcing structure with multi-efficiency connecting joints and reinforcing method

Abstract

The fabricated built-in reinforcing structure is used for reinforcing an existing frame structure and comprises a reinforcing body used for being arranged along the inner side of the existing frame structure, the reinforcing body is formed by splicing a plurality of sections of prefabricated parts, each prefabricated part comprises a steel core and concrete wrapping the steel core, and the steel core is connected with the concrete. The steel cores of the two spliced prefabricated parts oppositely extend out of the corresponding concrete and form extension sections; and the multiple multi-effect connecting nodes are arranged between every two spliced prefabricated parts respectively, and each multi-effect connecting node comprises a fixing part and a grouting material, the fixing part is used for connecting the two corresponding extension sections in a butt joint mode and fixing the extension sections to the existing frame structure, and the grouting material is used for being poured between the two corresponding concrete sections and wrapping the fixing part and the two extension sections. Prefabricated part assembly type construction and multi-efficiency connecting joints are adopted, the number of the connecting joints is reduced, the construction speed is high, and the cooperative work performance and stability of the reinforcing structure and the existing frame structure can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to an assembled built-in reinforcement structure with multi-functional connection nodes and a reinforcement method. Background Art

[0002] At present, there are quite a few old concrete frame structures in my country. The material quality and construction quality of the buildings have safety hazards, and the old existing buildings cannot meet the new earthquake fortification standards. They need to be reinforced. The existing reinforcement methods include increasing the cross-section method, sticking carbon fiber reinforcement method, external steel reinforcement method, adding shear wall reinforcement method, etc. However, the method of increasing the cross-section involves wet work on site, the construction is relatively long, and the building generally cannot be used normally during construction. The carbon fiber reinforcement method has aging and environmental pollution problems, the process is complex, and the construction conditions are high. The external steel reinforcement method is greatly affected by environmental factors, and the steel needs to be treated with fire and rust prevention. The method of adding shear wall reinforcement affects the building layout and reduces the flexibility of the building space. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and propose an assembled built-in reinforcement structure and reinforcement method with multi-functional connection nodes. The assembled construction of prefabricated components and multi-functional connection nodes are adopted to reduce the number of connection nodes, increase the construction speed, and ensure the collaborative working performance and stability of the reinforced structure and the existing frame structure.

[0004] The present invention is implemented by the following scheme: an assembled built-in reinforcement structure with multi-functional connection nodes is used to reinforce an existing frame structure, and the reinforcement structure includes: A reinforcement body arranged along the inner side of the existing frame structure, wherein the reinforcement body is formed by splicing a plurality of prefabricated components, wherein the prefabricated components include a steel core and concrete wrapped outside the steel core, and the steel cores of the two spliced ​​prefabricated components relatively extend out of the corresponding concrete to form an extension section; A plurality of multi-functional connection nodes are respectively arranged between each two sections of the spliced ​​prefabricated components, and the multi-functional connection nodes include fixing parts for butting the corresponding two sections of the extension sections together and fixing them to the existing frame structure, and grouting materials for pouring between the corresponding two sections of the concrete and wrapping the fixing parts and the two sections of the extension sections.

[0005] A further improvement of the assembled built-in reinforcement structure with a multi-functional connection node of the present invention is that: the existing frame structure includes two frame columns arranged at intervals and a frame beam fixed between the tops of the two frame columns; the shape, quantity and layout position of the prefabricated components meet the requirement that the multi-functional connection node is located in the middle of the frame beam or any one of the frame columns.

[0006] A further improvement of the assembled built-in reinforcement structure with multi-function connection nodes of the present invention is that the multi-function connection node also includes a post-cast non-disassembly formwork, and the post-cast non-disassembly formwork can be assembled to cover the outside of the casting space enclosed by the corresponding two sections of concrete and the existing frame structure, and the post-cast non-disassembly formwork is provided with grouting holes for the corresponding grouting material to be poured into the casting space.

[0007] The further improvement of the assembled built-in reinforcement structure with multi-functional connection nodes of the present invention is: The post-cast non-disassembly formwork is a trough-shaped prefabricated part, comprising a post-cast web and two post-cast flange plates fixed on opposite sides of the post-cast web, and opposite ends of the inner surface of the post-cast web are fixed with hanging ears folded outwards relatively; The relative inner ends of the two spliced ​​sections of concrete are fixed with inwardly extending support ears, and the two hanging ears are respectively hung on the two supporting ears when the post-cast non-disassembly formwork is misplacedly inserted and slid into place to the corresponding casting space.

[0008] A further improvement of the assembled built-in reinforcement structure with multi-functional connection nodes of the present invention is that the number of the grouting holes is at least two, and all are opened on one of the post-cast flange plates, and two of the grouting holes are respectively located at two corner positions of the post-cast flange plate away from the post-cast web plate.

[0009] The further improvement of the assembled built-in reinforcement structure with multi-functional connection nodes of the present invention is: The cross section of the steel core is H-shaped, including a first flange plate adjacent to the existing frame structure, a second flange plate away from the existing frame structure, and a web plate fixed between the first flange plate and the second flange plate, and a group of first reserved holes are opened on the first flange plate at a position corresponding to the extension section; The fixing parts include two groups of anchor bolts and a first lap plate for bridging the first flange plates of the two sections of prefabricated components to be spliced. A group of second reserved holes are respectively opened at the two ends of the first lap plate, and correspond one-to-one with the two groups of the first reserved holes. The two groups of anchor bolts are used to respectively penetrate the two groups of the second reserved holes and the corresponding group of the first reserved holes and be anchored into the existing frame structure.

[0010] The further improvement of the assembled built-in reinforcement structure with multi-functional connection nodes of the present invention is: The fixing member also includes a second lap plate for lapped between the second flange plates or the web plates of the two spliced ​​prefabricated components, and a butt bolt group for fixing the second lap plate with the corresponding two second flange plates or the corresponding two web plates.

[0011] The present invention also provides an assembled built-in reinforcement method, which uses the assembled built-in reinforcement structure with multi-functional connection nodes as described above to reinforce the existing frame structure. The reinforcement method comprises the following steps: S1: arranging a plurality of sections of prefabricated components at corresponding positions inside the existing frame structure, and arranging a plurality of the multi-functional connection nodes between each two sections of the prefabricated components that are spliced; S2: During the execution of step S1: Using the fixing member of the multi-functional connection node to butt the corresponding two extension sections of the prefabricated components together and fix them to the existing frame structure; Grouting material is poured between the two corresponding sections of concrete, and the grouting material wraps the fixing member and the two extension sections.

[0012] The further improvement of the assembled built-in reinforcement method of the present invention is: The multi-functional connection node further comprises a post-casting non-disassembly formwork, and the post-casting non-disassembly formwork is provided with grouting holes; After the corresponding two sections of the prefabricated component extensions are butt-jointed together and fixed to the existing frame structure by using fixing members, and before the grouting material is poured between the corresponding two sections of the concrete, the post-casting non-removal formwork cover is arranged outside the casting space enclosed by the corresponding two sections of concrete and the existing frame structure; Then, the grouting material is poured into the casting space through the grouting holes.

[0013] The further improvement of the assembled built-in reinforcement method of the present invention is: The cross section of the steel core is H-shaped, including a first flange plate, a second flange plate, and a web plate fixed between the first flange plate and the second flange plate, a group of first reserved holes is opened on the first flange plate at a position corresponding to the extension section; the fixing member includes two groups of anchor bolts and a first lap plate, and a group of second reserved holes is opened at each of the two ends of the first lap plate; Before arranging the plurality of prefabricated components at corresponding positions on the inner side of the existing frame structure, firstly, positioning holes are opened on the existing frame structure at positions corresponding to each group of the first reserved holes; When the multiple sections of prefabricated components are respectively arranged at corresponding positions inside the existing frame structure, the first flange plate is adjacent to the existing frame structure, the second flange plate is away from the existing frame structure, and the first reserved holes correspond to the positioning holes one by one; When the corresponding two sections of the extension sections of the prefabricated components are butt-jointed together and fixed to the existing frame structure using fixing parts, the first lap plate is firstly laid between the first flange plates of the two sections of the prefabricated components to be spliced, and the two groups of second reserved holes are made to correspond one to one with the two groups of the first reserved holes, and then the two groups of anchor bolts are respectively passed through the two groups of the second reserved holes and the corresponding groups of the first reserved holes and anchored into the corresponding positioning holes.

[0014] Compared with the prior art, the advantages of the present invention are: By using prefabricated components for assembly construction, the construction speed can be significantly increased, on-site wet work can be reduced, and the construction quality can be guaranteed.

[0015] Through the setting of multi-function connection nodes, while realizing the splicing of prefabricated components, it is also possible to fix the prefabricated components to the existing frame structure, solving the problem of too many nodes, complex force, and inability to ensure the collaborative working performance of the reinforced structure and the existing frame structure.

[0016] The multi-function connection nodes are set at the less stressed parts of the existing frame structure to ensure the pull-out and shear resistance of the multi-function connection nodes. The lap plates and lap bolts at the nodes are reasonably set to ensure the coordinated work and stability between the reinforced structure and the existing frame structure.

[0017] By setting up post-cast formwork that does not require disassembly, the casting space at the nodes can be quickly closed, avoiding on-site formwork casting, and there is no need to disassemble it after casting, which increases the construction speed.

[0018] By arranging the reinforcement structure on the inner side of the existing frame structure, it will not be affected by the external environment and will not affect the layout of the existing frame structure, thereby improving the flexibility of the building space. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 The figure is an overall effect diagram after the existing frame structure is reinforced by using the reinforcement structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the internal structure of a multi-functional connection node after the existing frame structure is reinforced by using the reinforcement structure of the present invention.

[0022] Figure 3 yes Figure 1Enlarged schematic diagram at point A in the middle.

[0023] Figure 4 yes Figure 2 Enlarged schematic diagram of point B in the middle.

[0024] Figure 5 yes Figure 2 Enlarged schematic diagram at point C in the middle.

[0025] Figure 6 It is a front view of the post-cast and non-disassembly formwork in the reinforced structure of the present invention.

[0026] Figure 7 It is a side view of the post-cast and non-disassembly formwork in the reinforced structure of the present invention.

[0027] Figure 8 It is a top view of the post-cast and non-disassembly formwork in the reinforced structure of the present invention.

[0028] In the figure: 1. existing frame structure; 11. frame beam; 12. frame column; 13. positioning hole; 2. prefabricated component; 2A. L-shaped component; 2B. I-shaped component; 21. extension section; 22. support ear; 23. web; 24. first flange plate; 25. second flange plate; 3. multi-function connection node; 31. fixing piece; 311. first lap plate; 312. anchor bolt; 313. second lap plate; 314. docking bolt group; 32. post-cast non-dismantling formwork; 321. post-cast web; 322. post-cast flange plate; 323. hanging ear; 324. grouting hole. DETAILED DESCRIPTION

[0029] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0030] The following is a further detailed description of an assembled built-in reinforcement structure with multi-functional connection nodes and an assembled built-in reinforcement method of the present invention in conjunction with the accompanying drawings and specific embodiments.

[0031] See also Figure 1~Figure 5As shown, an assembled built-in reinforcement structure with multi-functional connection nodes is used to reinforce an existing frame structure 1. The reinforcement structure includes: a reinforcement body for being arranged along the inner side of the existing frame structure 1, the reinforcement body is formed by splicing multiple sections of prefabricated components 2, the prefabricated components 2 include a steel core and concrete wrapped outside the steel core, and the steel cores of the two spliced ​​sections of the prefabricated components 2 extend out of the concrete to form an extension section 21. A plurality of multi-functional connection nodes 3 are respectively arranged between each two spliced ​​sections of the prefabricated components 2, and the multi-functional connection nodes 3 include a fixing member 31 for butting the corresponding two sections of the extension section 21 together and fixing them to the existing frame structure 1, and a grouting material (not shown in the figure) for pouring between the corresponding two sections of the concrete and wrapping the fixing member 31 and the two sections of the extension section 312.

[0032] This embodiment uses prefabricated components 2 for assembly construction, which can significantly increase the construction speed, reduce on-site wet work, and ensure the construction quality. In this embodiment, the splicing between prefabricated components 2 and the fixation with the existing frame structure 1 are achieved through multi-functional connection nodes 3, avoiding the problems of using connection nodes separately, resulting in too many nodes, complex force, and inability to ensure the coordinated working performance of the reinforcement structure and the existing frame structure. In addition, by setting the reinforcement structure on the inner side of the existing frame structure, it will not be affected by the external environment, nor will it affect the layout of the existing frame structure, thereby improving the flexibility of the building space.

[0033] In order to ensure the pull-out and shear resistance of the multi-functional connection node, it is preferred that the shape, quantity and layout of the prefabricated component 2 can satisfy the requirement that the multi-functional connection node 3 is located at a position with less stress on the existing frame structure 1. Figure 1 and Figure 2Taking the existing frame structure 1 shown as an example, the existing frame structure 1 includes two frame columns 12 arranged at intervals and a frame beam 11 fixed between the tops of the two frame columns 12. The shape, quantity and layout position of the prefabricated component 2 meet the requirement that the multi-functional connection node 3 is located in the middle of the frame beam 11 or any of the frame columns 12, because when the existing frame structure 1 is subjected to horizontal earthquake action, the middle of the frame column 12 and the middle of the frame beam 11 are less stressed. Specifically, in this embodiment, the multi-section prefabricated components 2 of the reinforcement body include two L-shaped components 2A and two I-shaped components 2B, the two L-shaped components 2A are used to be respectively arranged at the two inner corners between the frame beam 11 and the two frame columns 12, and the two I-shaped components 2B are used to be respectively arranged on the opposite inner sides of the two frame columns 12 and located below the two L-shaped components 2A. There are three multi-functional connection nodes 3, which are respectively arranged between two L-shaped components 2A and between two I-shaped components 2B and two L-shaped components 2A, i.e., at the places where the stress of the existing frame structure 1 is relatively small. Through the above arrangement, the stress performance of the multi-functional connection node 3 can be effectively improved.

[0034] In some preferred embodiments, see Figure 3~Figure 8 As shown, the multi-functional connection node 3 also includes a post-cast non-disassembly formwork 32, which can be assembled to cover the outside of the casting space Q surrounded by the corresponding two sections of concrete and the existing frame structure 1, and the post-cast non-disassembly formwork 32 is provided with grouting holes 324 for the corresponding grouting material to be poured into the casting space Q.

[0035] Specifically, the post-cast non-disassembly formwork 32 is a groove-shaped prefabricated part, including a post-cast web 321 and two post-cast flange plates 322 fixed on opposite sides of the post-cast web 321. The inner surface of the post-cast web 321 has relatively two ends fixed with hanging ears 323 folded outwards. Figure 6~Figure 8 The inner ends of the two sections of concrete to be joined are fixed with support ears 22 extending inwards, as shown in FIG. Figure 4~Figure 5As shown. The two hanging ears 323 are respectively hung on the two supporting ears 22 when the post-casting non-disassembly formwork 32 is misplacedly inserted and slid into place to correspond to the casting space Q. It should be noted that the width of the supporting ear 22 along the sliding direction of the post-casting non-disassembly formwork 32 should not be greater than the thickness of the concrete-wrapped steel core on the prefabricated component 2, so that when the post-casting non-disassembly formwork 32 is misplacedly inserted, the hanging ears 323 can completely avoid the corresponding supporting ears 22. After the hanging ears 323 are inserted and cross the supporting ears 22, the post-casting non-disassembly formwork 32 is slid again, so that the hanging ears 323 and the supporting ears 22 are opposite to each other, and the two form a mutually built relationship, which can prevent the post-casting non-disassembly formwork 32 from escaping from the casting space Q along the insertion direction. In particular, for the multi-functional connection node 3 set at the frame beam 11, if there is no support of the supporting ears 22, the post-casting non-disassembly formwork 32 will fall out of the casting space Q under the action of gravity. Preferably, the thickness and position of the support ear 22 and the hanging ear 323 along the insertion direction of the post-cast non-removal formwork 32 are just enough to ensure that the outer surface of the post-cast non-removal formwork 32 is flush with the outer surface of the adjacent concrete when the support ear 22 and the hanging ear 323 are in contact. In this embodiment, the post-cast non-removal formwork 32 is provided to quickly close the casting space Q, avoid on-site formwork casting, and no disassembly is required after casting, thereby increasing the construction speed.

[0036] In order to increase the grouting speed, the number of the grouting holes 324 is at least two, and both are opened on one of the post-cast flange plates 322. Preferably, there are two grouting holes 324, which are respectively opened at two corner positions of the post-cast flange plate 322 away from the post-cast web plate 321. In this way, after the post-cast non-removal formwork 32 is covered outside the corresponding casting space Q, the grouting holes 324 at the two corner positions have a higher elevation. In addition to being used for grouting, they can also be used as overflow holes, that is, when grouting the grouting material, if the two grouting holes 324 with higher elevations are bubbling out, it means that the casting space Q has been filled with grouting material, and the pouring can be stopped. Of course, in order to facilitate operation and observation, other grouting holes 324 can be set at a lower elevation (such as near the post-cast web plate 321), and only the grouting holes 324 with lower elevations are used for grouting, while the grouting holes 324 with higher elevations are used as overflow holes for observation.

[0037] In some preferred embodiments, see Figure 4 and Figure 5As shown, the cross section of the steel core is H-shaped, including a first flange plate 24 adjacent to the existing frame structure 1, a second flange plate 25 away from the existing frame structure 1, and a web plate 23 fixed between the first flange plate 24 and the second flange plate 25. A group of first reserved holes (not shown in the figure) are opened on the first flange plate 24 at a position corresponding to the extension section 21. The fixing member 31 includes two groups of anchor bolts 312 and a first lap plate 311 used to be laid between the first flange plates 24 of the two sections of prefabricated components 2 to be spliced. A group of second reserved holes (not shown in the figure) are opened at each of the two ends of the first lap plate 311, and correspond to the two groups of the first reserved holes one by one. The two groups of anchor bolts 312 are used to respectively penetrate the two groups of the second reserved holes and the corresponding group of the first reserved holes and anchored to the existing frame structure 1. Furthermore, the fixing member 31 also includes two second lap plates 313 respectively arranged between the second flange plate 25 and the web plate 23 of the two prefabricated components 2 to be spliced, and two butt bolt groups 314 respectively used to fix the two second lap plates 313 with the corresponding two second flange plates 25 and the corresponding two web plates 23. Of course, under the premise of ensuring the stress performance of the multi-functional connection node 3, only one second lap plate 313 can be set, and the butt bolt group 314 can be used to overlap between the two second flange plates 25 or between the two web plates 23. Through the reasonable arrangement of the first lap plate 311, the second lap plate 313, the anchor bolts 312 and the butt bolt group 314, the reliable connection of the fixing member 33 to the two extension sections 21 is guaranteed, and further cooperates with the anchoring of the grouting material to ensure the coordinated work and stability between the reinforced structure and the existing frame structure 1.

[0038] An assembled built-in reinforcement method, see Figure 1~Figure 5 As shown, the existing frame structure 1 is reinforced by using the assembled built-in reinforcement structure with multi-functional connection nodes as described above. The reinforcement method includes the following steps: Step S1: transport multiple sections of prefabricated components 2 to the site and respectively set them at corresponding positions inside the existing frame structure 1, and set multiple multi-functional connection nodes 3 between every two sections of prefabricated components 2 that are spliced.

[0039] Step S2: During the execution of step S1: The fixing member 31 of the multi-functional connection node 3 is used to butt-join the corresponding two extension sections 21 of the prefabricated component 2 together and fix them to the existing frame structure 1 .

[0040] Grouting material is poured between the two corresponding sections of the concrete, and the grouting material wraps the fixing member 31 and the two sections of the extension sections 21 .

[0041] See also Figure 3~Figure 8As shown, for the case where the multi-functional connection node 3 is provided with a post-cast non-disassembly formwork 32: after the corresponding two sections of the extension section 21 of the prefabricated component 2 are butt-jointed together and fixed to the existing frame structure 1 by using the fixing member 31, and before the grouting material is poured between the corresponding two sections of the concrete, the post-cast non-disassembly formwork 32 is covered outside the casting space Q surrounded by the corresponding two sections of concrete and the existing frame structure 1. For the case where a hanging ear 323 and a supporting ear 22 are provided, the method of covering the post-cast non-disassembly formwork 32 is: the opening of the post-cast non-disassembly formwork 32 is directed toward the corresponding casting space Q, and the hanging ear 323 can completely avoid the corresponding supporting ear 22, and then the post-cast non-disassembly formwork 32 is inserted. After the hanging ear 323 is inserted and passes over the supporting ear 22, the post-cast non-disassembly formwork 32 is slid so that the hanging ear 323 and the supporting ear 22 are opposite to each other, and the two form a mutually spanning relationship, so that the post-cast non-disassembly formwork 32 is maintained in a state of being covered in the corresponding casting space Q. After the post-casting non-removal formwork 32 is installed, grouting material is poured into the casting space Q through the grouting holes 324 opened thereon. During the pouring process, the grouting holes 324 with higher elevations can be selected as overflow holes based on the layout positions of the grouting holes 324 to observe whether the casting space Q is filled. After the grouting material is poured, the post-casting non-removal formwork 32 does not need to be removed.

[0042] See also Figure 4 and Figure 5 As shown, for the case where the steel core cross section of the prefabricated component 2 is H-shaped, and the fixing member 31 includes an anchor bolt 312 and a first lap plate 311: before the multiple sections of prefabricated components 2 are respectively arranged at the corresponding positions on the inner side of the existing frame structure 1, the positioning holes 13 are first opened correspondingly at the positions corresponding to each group of first reserved holes on the existing frame structure 1. When the multiple sections of prefabricated components 2 are respectively arranged at the corresponding positions on the inner side of the existing frame structure 1, the first flange plate 24 is adjacent to the existing frame structure 1, the second flange plate 25 is away from the existing frame structure 1, and the first reserved holes correspond to the positioning holes 13 one by one. When the corresponding two sections of the extension section 21 of the prefabricated component 2 are butted together and fixed to the existing frame structure 1 by using the fixing member 31, the first lap plate 311 is firstly laid between the first flange plates 24 of the two sections of the prefabricated component 2 to be spliced, and the two groups of second reserved holes are made to correspond to the two groups of first reserved holes one by one, and then the two groups of anchor bolts 312 are respectively passed through the two groups of second reserved holes and the corresponding groups of first reserved holes and anchored into the corresponding positioning holes 13. For the case where a second lap plate 313 and a butt bolt group 314 are further provided: it is also necessary to overlap and fix the corresponding two second flange plates 25 or the two web plates 23 by using the second lap plate 313 and the butt bolt group 314. After the two extension sections 21 are fixed by using the fixing member 31, the above-mentioned steps of covering the post-cast non-disassembly formwork 32 and pouring the grouting material are performed.

[0043] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0044] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An assembled built-in reinforcement structure with multiple effective connection nodes, used to reinforce an existing frame structure, characterized in that: The reinforcement structure comprises: A reinforcement body arranged along the inner side of the existing frame structure, wherein the reinforcement body is formed by splicing a plurality of prefabricated components, wherein the prefabricated components include a steel core and concrete wrapped outside the steel core, and the steel cores of the two spliced ​​prefabricated components relatively extend out of the corresponding concrete to form an extension section; A plurality of multi-functional connection nodes are respectively arranged between each two sections of the spliced ​​prefabricated components, and the multi-functional connection nodes include fixing parts for butting the corresponding two sections of the extension sections together and fixing them to the existing frame structure, and grouting materials for pouring between the corresponding two sections of the concrete and wrapping the fixing parts and the two sections of the extension sections.

2. The assembled built-in reinforcement structure with multi-functional connection nodes according to claim 1, characterized in that: The existing frame structure includes two frame columns arranged at intervals and a frame beam fixed between the tops of the two frame columns; the shape, quantity and layout position of the prefabricated components meet the requirements that the multi-functional connection node is located in the middle of the frame beam or any of the frame columns.

3. The assembled built-in reinforcement structure with multi-functional connection nodes according to claim 1, characterized in that: The multi-functional connection node also includes a post-cast non-disassembly formwork, which can be assembled with a ground cover and arranged outside the casting space surrounded by the corresponding two sections of concrete and the existing frame structure. The post-cast non-disassembly formwork is provided with grouting holes for the corresponding grouting material to be poured into the casting space.

4. The assembled built-in reinforcement structure with multi-functional connection nodes as claimed in claim 3, characterized in that: The post-cast non-disassembly formwork is a trough-shaped prefabricated part, comprising a post-cast web and two post-cast flange plates fixed on opposite sides of the post-cast web, and opposite ends of the inner surface of the post-cast web are fixed with hanging ears folded outwards relatively; The relative inner ends of the two spliced ​​sections of concrete are fixed with inwardly extending support ears, and the two hanging ears are respectively hung on the two supporting ears when the post-cast non-disassembly formwork is misplacedly inserted and slid into place to the corresponding casting space.

5. The assembled built-in reinforcement structure with multi-functional connection nodes according to claim 4, characterized in that: The number of the grouting holes is at least two, and all of them are opened on one of the post-cast flange plates, wherein two of the grouting holes are respectively located at two corners of the post-cast flange plate away from the post-cast web plate.

6. The assembled built-in reinforcement structure with multi-functional connection nodes according to claim 1, characterized in that: The cross section of the steel core is H-shaped, including a first flange plate adjacent to the existing frame structure, a second flange plate away from the existing frame structure, and a web plate fixed between the first flange plate and the second flange plate, and a group of first reserved holes are opened on the first flange plate at a position corresponding to the extension section; The fixing parts include two groups of anchor bolts and a first lap plate for bridging the first flange plates of the two sections of prefabricated components to be spliced. A group of second reserved holes are respectively opened at the two ends of the first lap plate, and correspond one-to-one with the two groups of the first reserved holes. The two groups of anchor bolts are used to respectively penetrate the two groups of the second reserved holes and the corresponding group of the first reserved holes and be anchored into the existing frame structure.

7. The assembled built-in reinforcement structure with multi-functional connection nodes according to claim 6, characterized in that: The fixing member also includes a second lap plate for lapped between the second flange plates or the web plates of the two spliced ​​prefabricated components, and a butt bolt group for fixing the second lap plate with the corresponding two second flange plates or the corresponding two web plates.

8. An assembled built-in reinforcement method, characterized in that: The existing frame structure is reinforced by using the assembled built-in reinforcement structure with multi-functional connection nodes as claimed in claim 1, and the reinforcement method comprises the steps of: S1: arranging a plurality of sections of prefabricated components at corresponding positions inside the existing frame structure, and arranging a plurality of the multi-functional connection nodes between each two sections of the prefabricated components that are spliced; S2: During the execution of step S1: Using the fixing member of the multi-functional connection node to butt the corresponding two extension sections of the prefabricated components together and fix them to the existing frame structure; Grouting material is poured between the two corresponding sections of concrete, and the grouting material wraps the fixing member and the two extension sections.

9. The assembled built-in reinforcement method according to claim 8, characterized in that: The multi-functional connection node further comprises a post-casting non-disassembly formwork, and the post-casting non-disassembly formwork is provided with grouting holes; After the corresponding two sections of the prefabricated component extensions are butt-jointed together and fixed to the existing frame structure by using fixing members, and before the grouting material is poured between the corresponding two sections of the concrete, the post-casting non-removal formwork cover is arranged outside the casting space enclosed by the corresponding two sections of concrete and the existing frame structure; Then, the grouting material is poured into the casting space through the grouting holes.

10. The assembled built-in reinforcement method according to claim 8, characterized in that: The cross section of the steel core is H-shaped, including a first flange plate, a second flange plate, and a web plate fixed between the first flange plate and the second flange plate, a group of first reserved holes is opened on the first flange plate at a position corresponding to the extension section; the fixing member includes two groups of anchor bolts and a first lap plate, and a group of second reserved holes is opened at each of the two ends of the first lap plate; Before arranging the plurality of prefabricated components at corresponding positions on the inner side of the existing frame structure, firstly, positioning holes are opened on the existing frame structure at positions corresponding to each group of the first reserved holes; When the multiple sections of prefabricated components are respectively arranged at corresponding positions inside the existing frame structure, the first flange plate is adjacent to the existing frame structure, the second flange plate is away from the existing frame structure, and the first reserved holes correspond to the positioning holes one by one; When the corresponding two sections of the extension sections of the prefabricated components are butt-jointed together and fixed to the existing frame structure using fixing parts, the first lap plate is firstly laid between the first flange plates of the two sections of the prefabricated components to be spliced, and the two groups of second reserved holes are made to correspond one to one with the two groups of the first reserved holes, and then the two groups of anchor bolts are respectively passed through the two groups of the second reserved holes and the corresponding groups of the first reserved holes and anchored into the corresponding positioning holes.

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