Reinforcement method for existing structure by adding sliding support to back-support process

Abstract

The application relates to a reinforcing method for reinforcing an existing structure by adding a sliding support to a back supporting process, which comprises the following steps: reinforcing the upper structure of the existing structure; pre-assembling a sliding support at a predetermined position after reinforcing the upper structure; adding a structural column, pre-burying a screw rod and reserving a construction operation surface without pouring; back supporting the sliding support; and pouring grouting material on the construction operation surface. The application has the advantages that the existing structure can be reserved without being removed, the force transmission path can be changed according to the project requirements, the horizontal thrust on the top of the structural column can be reduced by releasing displacement, the existing structure and the added sliding support can be cooperatively stressed by back supporting, the construction efficiency is improved, and the reinforcing range is optimized.

Description

Technical Field

[0001] This application relates to the technical field of strengthening existing structures, and in particular to a strengthening method for strengthening existing structures by adding sliding supports using a back-support process. Background Technology

[0002] The existing structure is a steel roof truss for a factory building. The steel roof truss consists of multiple longitudinally arranged and spaced-apart A-beam trusses and two sets of original supports symmetrically arranged at both ends of the A-beam trusses. The A-beam trusses and the original supports work together to form a complete roof truss structure. In order to reduce the space occupied by the existing structure, it is necessary to remove the original supports at one end of the A-beam trusses. After the original supports are removed, the stability of the existing structure will be significantly affected. Therefore, it is necessary to reinforce the steel structure of the existing structure.

[0003] Currently, the three most common methods of steel structure reinforcement are as follows:

[0004] The first method is to strengthen the structure by changing the structural system; that is, to add new members or change the hinged joints to rigid joints on the original structural layout, such as adding beam supports, beam bracing, or corner bracing. This method can effectively improve the stability of the structural system.

[0005] The second method is the cross-section enlargement method; that is, welding is performed on the original structural members to enlarge the cross-section for reinforcement, and external steel is bonded for reinforcement. This method effectively improves the stiffness and strength of the structural members.

[0006] The third form is: reinforced concrete encasing; that is, encasing the original steel components in concrete to form concrete-concrete steel components.

[0007] However, the aforementioned technologies have the following problems: Modifying the structural system for reinforcement can damage the original structure of the A-frame truss; if steel structures can only be reinforced under load, the method of increasing the cross-section needs to consider the weakening of the component's strength and stability during welding, or the calculation of the steel bonding needs to consider the component's margin after adhesive failure to prevent sudden collapse; while the external reinforced concrete reinforcement method has good reinforcement effect, it is limited by subsequent space constraints and the high cost of reinforcing beams, requiring overall reinforcement from beam to foundation, thus having limited applicability; therefore, how to effectively release horizontal displacement and achieve coordinated structural stress without damaging the original structure has become an urgent technical problem to be solved. Summary of the Invention

[0008] In order to change the force transmission path according to project needs while preserving the existing structure without demolition, the horizontal thrust on the top of the structural columns can be reduced by releasing displacement, and the existing structure and the newly added sliding bearing can be made to share the force through back-support. While ensuring structural safety, this method improves construction efficiency and optimizes the reinforcement range. This application provides a reinforcement method for the existing structure by adding sliding bearings with back-support technology.

[0009] This application provides a reinforcement method for existing structures by adding sliding supports using a backfilling support process, including the following steps:

[0010] S1: Reinforcement work is carried out on the superstructure of the existing structure;

[0011] S2: After the superstructure reinforcement construction is completed, the sliding bearings are pre-assembled at the predetermined positions;

[0012] S3: Add a new structural column and embed the bolts connected to the sliding support into the structural column, and leave a construction operation surface without pouring.

[0013] S4: Backing sliding support;

[0014] S5: Pour grouting material onto the construction surface.

[0015] By adopting the above technical solutions, adding sliding supports and modifying the original support positions, horizontal displacement can be released, solving the problems caused by horizontal forces on the sliding supports and saving the additional engineering work caused by horizontal forces. At the same time, the use of back-jacking technology makes the sliding supports closely integrated with the existing structure, effectively coordinating the force and improving the overall structure. There is no need to demolish the existing structure, reducing the construction period and saving the cost of demolition and new steel structure materials.

[0016] Preferably, the sliding support includes an upper base plate connected to the bottom surface of the upper structure, a lower base plate located below the upper base plate, and a rubber gasket disposed between the upper base plate and the lower base plate. The upper base plate and the lower base plate are connected by a screw so that the upper base plate and the lower base plate clamp the rubber gasket, thereby releasing displacement through the elastic deformation of the rubber gasket.

[0017] By adopting the above technical solution, the upper base plate and the lower base plate are connected by screws so that the upper base plate and the lower base plate clamp the rubber gasket. This allows for force transmission in the vertical direction while enabling fine-tuning in the lateral direction, thus improving the adaptability and reliability of the sliding support.

[0018] Preferably, the top surface of the upper base plate has an oblong hole corresponding to the position of the screw, the screw passes vertically through the oblong hole, and the screw can slide laterally within the oblong hole.

[0019] By adopting the above technical solution, the waist-shaped hole opened on the upper base plate can provide space for the screw to slide laterally, so that the sliding support can release horizontal displacement when subjected to horizontal force, thereby effectively reducing the impact on the bearing capacity of the structural column.

[0020] Preferably, a limiting plate and a limiting baffle for limiting the rubber gasket are fixedly connected to the top surface of the lower base plate.

[0021] By adopting the above technical solutions, the limiting plate and the limiting baffle can effectively restrict the position of the rubber gasket and ensure that the rubber gasket remains stable when subjected to force.

[0022] Preferably, the limiting plate and the limiting baffle form a placement space, and the rubber gasket is placed in the placement space.

[0023] By adopting the above technical solution, the limiting plate and the limiting baffle form a placement space, which allows the rubber gasket to be placed stably in it. This design effectively limits the lateral displacement of the rubber gasket, ensuring that the rubber gasket maintains a stable position during the stress process, thereby improving the overall structural stability of the sliding support. At the same time, the placement space provides a good support environment for the rubber gasket, which helps to evenly distribute the external load, reduce stress concentration, and thus extend the service life of the sliding support.

[0024] Preferably, the screw is threaded with a lower connecting nut and an upper connecting nut, the upper connecting nut being used to connect the screw to the upper base plate, and the lower connecting nut being used to connect the lower base plate to the screw.

[0025] By adopting the above technical solution, the screw is threaded with a lower connecting nut and an upper connecting nut, which allows the screw to be stably connected to the upper and lower base plates. The upper connecting nut fixes the screw to the upper base plate, ensuring the stability of the overall structure of the sliding support and effectively reducing displacement of the sliding support during stress. The lower connecting nut fixes the lower base plate to the screw, enhancing the connection strength between the lower base plate and the screw, thereby ensuring the reliability of the entire sliding support when bearing loads. This connection method not only improves the overall integrity of the structure but also facilitates installation and adjustment, ensuring the effective cooperation between the sliding support and the existing structure in bearing stress.

[0026] Preferably, the screw is further provided with a pad and a washer, the washer being located between the pad and the upper connecting nut.

[0027] By adopting the above technical solution, the pad increases the contact area, effectively reducing the local deformation or damage that may be caused by the upper connecting nut directly acting on the upper base plate; the washer further evens out the clamping force, ensuring that the connection between the screw and the upper base plate is more firm and reliable, thereby improving the load-bearing capacity and service life of the entire sliding support installation structure.

[0028] Preferably, in S4, there are also two support frames symmetrically arranged on both sides of the structural column. A jack is installed on the top of each of the two support frames. The jacks are used to push back the bottom surface of the upper structure through the jacking support.

[0029] By adopting the above technical solution, the jacks can be used to jack up the superstructure, effectively reducing the impact of superstructure deflection on the sliding support, making the sliding support and superstructure more tightly connected, thus achieving a better synergistic force-bearing effect; at the same time, the symmetrical arrangement of the support frame ensures the stability of the jacking process, effectively reducing structural damage caused by uneven force, and further improving the reliability of the reinforcement method.

[0030] Preferably, one side of the limiting baffle is fixedly connected with multiple stiffening ribs.

[0031] By adopting the above technical solution, the stiffening ribs can significantly improve the structural strength of the limiting baffle and effectively reduce deformation or damage during the stress process.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. Adding sliding bearings and modifying the original bearing positions can release horizontal displacement, solve the problems caused by horizontal forces on the sliding bearings, and save the extra engineering work caused by horizontal forces; at the same time, the use of back-jacking technology makes the sliding bearings tightly integrated with the existing structure, effectively coordinating the force and improving the overall structural integrity; there is no need to demolish the existing structure, reducing the construction period and saving the cost of demolition and new steel structure materials.

[0034] 2. The oblong hole on the upper base plate provides space for the screw to slide laterally, allowing the sliding support to release horizontal displacement when subjected to horizontal force, thereby effectively reducing the impact on the load-bearing capacity of the structural column; the limiting plate and limiting baffle fixed on the top surface of the lower base plate form a placement space, in which the rubber gasket is placed, which can effectively limit the position of the rubber gasket and ensure that the rubber gasket remains stable under force; the screw passes vertically through the oblong hole and connects to the lower base plate, which can transmit force in the vertical direction while allowing for lateral fine adjustment, further improving the adaptability and reliability of the sliding support;

[0035] 3. The installation of jacks enables the jacking operation of the superstructure, effectively reducing the impact of superstructure deflection on the sliding support, making the sliding support and superstructure more tightly connected, thereby achieving a better synergistic force-bearing effect; at the same time, the symmetrical arrangement of the support frame ensures the stability of the jacking process, effectively reducing structural damage caused by uneven force distribution, and further improving the reliability of the reinforcement method. Attached Figure Description

[0036] Figure 1 This is a structural schematic diagram of the steel roof truss of this application.

[0037] Figure 2 yes Figure 1 A magnified view of part A in the middle.

[0038] Figure 3 This is a schematic diagram of the overall structure of this application.

[0039] Figure 4 yes Figure 3 A magnified view of part B in the middle section.

[0040] Figure 5 This is a side view of the lower chord and the first connecting plate of this application.

[0041] Figure 6 This is a top view of the lower chord, upper base plate, and first connecting plate of this application.

[0042] Figure 7 This is a front view of the lower chord, upper base plate, and first connecting plate of this application.

[0043] Figure 8 This is a side view of the lower chord, upper base plate, and first connecting plate.

[0044] Figure 9 This is a top view of the lower base plate, the limiting baffle, and the limiting plate of this application.

[0045] Figure 10 This is an exploded view of the bottom plate and rubber gasket of this application.

[0046] Figure 11 This is a top view of the lower chord and sliding support of this application.

[0047] Figure 12 This is a sectional view of the structural column, sliding support, and lower chord of this application.

[0048] Figure 13 This is a cross-sectional view of the structural columns, sliding supports, and lower chords of this application in another state.

[0049] Figure 14 This is a front view of the overall back-to-top process of this application.

[0050] Figure 15 This is a front view of the structural column after the grouting material has been poured.

[0051] Figure 16 This is a sectional view of the structural column and sliding support of this application.

[0052] Explanation of reference numerals in the attached drawings: 1. Existing support; 11. Lower chord; 12. Upper chord; 13. Lower connecting plate; 14. Upper connecting plate; 141. First extension plate; 142. Second extension plate; 15. Diagonal brace; 151. Fixing plate; 2. First connecting plate; 21. Second web member; 22. Upper web member; 23. Lower web member; 3. Upper base plate; 31. Waist-shaped hole; 4. Second connecting plate; 41. Tie rod; 5. Lower base plate; 51. Limiting plate; 52. Limiting baffle; 521. Stiffening rib; 53. Rubber gasket; 54. Screw; 541. Lower connecting nut; 542. Pad; 543. Washer; 544. Upper connecting nut; 55. Through hole; 6. Structural column; 61. Jack; 62. Backing support. Detailed Implementation

[0053] The following is in conjunction with the appendix Figure 1-16 This application will be described in further detail.

[0054] Reference Figure 1 and Figure 2 The existing structure is a steel roof truss for a factory building. The steel roof truss includes multiple longitudinally arranged and spaced-apart A-beam trusses and two sets of original supports 1 symmetrically arranged at both ends of the A-beam trusses. The A-beam trusses and the original supports 1 cooperate with each other to form a complete roof truss structure.

[0055] The A-frame truss includes a lower chord 11 arranged laterally and with its ends overlapping the existing support 1, two upper chords 12 arranged in an A-shape, multiple lower connecting plates 13 arranged on the lower chord 11, multiple upper connecting plates 14 arranged on the upper chords 12, and multiple diagonal braces 15 fixed between the upper connecting plates 14 and the lower connecting plates 13. The lower chord 11 is fixed by welding two angle steels with their inner corners back to back, forming a gap between the two angle steels for the insertion of the lower connecting plates 13. After the lower connecting plates 13 are inserted into the gap between the two angle steels, they are fixed between the two angle steels by welding, thereby fixing the lower connecting plates 13 at the node of the lower chord 11. The structures of the upper chords 12 and the diagonal braces 15 are the same as those of the lower chord 11, and the way the upper connecting plates 14 are fixed to the upper chords 12 is the same as the way the lower connecting plates 13 are fixed to the lower chords 11, so they will not be described in detail.

[0056] This application discloses a reinforcement method for existing structures using a top-support process to add sliding supports. (Refer to...) Figures 3-4 This includes the following steps:

[0057] S1: Reinforce the superstructure of the existing structure.

[0058] Reference Figures 4-6The superstructure includes, but is not limited to, truss structures, structural columns, structural beams, and supports for structural beams, which can concentrate loads. In this embodiment, the superstructure is a truss structure, which includes a lower chord 11. A first connecting plate 2 is added at a predetermined position on the lower chord 11. Since the lower chord 11 is fixed by welding two angle steels with their inner corners back to back, and a gap is formed between the two angle steels for inserting the first connecting plate 2, the first connecting plate 2 is inserted into the gap between the two angle steels, and the top surface of the first connecting plate 2 extends above the lower chord 11. Then, the first connecting plate 2 is fixed between the two angle steels by welding, thereby fixing the first connecting plate 2 at the predetermined position on the lower chord 11.

[0059] Reference Figure 4 , Figure 7 and Figure 8 A second connecting plate 4 is added at the connection between the lower chord 11 and the first connecting plate 2, and a first web member and a second web member 21 are added on the first connecting plate 2, and a tie rod 41 is added on the second connecting plate 4.

[0060] Both the first and second web members 21 are obliquely arranged, with the inclination direction of the first web member opposite to that of the second web member 21. Two of each type of web member are provided; the two first web members are symmetrically arranged on both sides of the first connecting plate 2, and the two second web members 21 are symmetrically arranged on both sides of the first connecting plate 2. In this embodiment, the web members are angle irons, and the inner angles of the two first web members on the first connecting plate 2 are arranged back-to-back, as are the inner angles of the two second web members 21 on the first connecting plate 2.

[0061] A fixing plate 151 is provided on the diagonal brace 15 adjacent to the first web member. Since the structure of the diagonal brace 15 is the same as that of the lower chord 11, that is, the diagonal brace 15 is fixed by welding two angle steels with their inner corners back to back. The fixing plate 151 is inserted into the gap on the diagonal brace 15, and the top and bottom surfaces of the fixing plate 151 extend beyond the diagonal brace 15. Then, the fixing plate 151 is fixed to the gap on the diagonal brace 15 by welding, thereby fixing the fixing plate 151 to the diagonal brace 15. A first extension plate 141 is fixed on the upper connecting plate 14 adjacent to the top of the first web member. The bottom surface of the first extension plate 141 extends beyond the upper chord 12. The first web member includes an upper web member 22 whose top end is fixedly connected to the side of the first extension plate 141 and a lower web member 23 welded and fixed to the side of the first connecting plate 2. The ends of the upper web member 22 and the lower web member 23 that are close to each other are welded and fixed to the fixing plate 151.

[0062] A second extension plate 142 is fixed to the upper connecting plate 14 adjacent to the top of the second web member 21. The bottom surface of the second extension plate 142 extends beyond the upper chord member 12. The top of the second web member 21 is welded to the side of the second extension plate 142, and the bottom of the second web member 21 is welded to the side of the first connecting plate 2. Thus, the first web member and the second web member 21 are supported between the upper chord member 12 and the lower chord member 11 by the first connecting plate 2, thereby reinforcing the upper structure.

[0063] The second connecting plate 4 is perpendicular to the first connecting plate 2, and there are two second connecting plates 4, which are symmetrically arranged on both sides of the first connecting plate 2. The second connecting plates 4 are welded and fixed to the connection between the first connecting plate 2 and the lower chord 11. In order to ensure that the second connecting plate 4 can fit tightly against the connection between the lower chord 11 and the first connecting plate 2, and to make the second connecting plate 4 more securely fixed at the connection between the lower chord 11 and the first connecting plate 2, a notch is provided on the second connecting plate 4 corresponding to the position of the connection between the lower chord 11 and the first connecting plate 2.

[0064] Two tie rods 41 are provided on the same second connecting plate 4. The two tie rods 41 are symmetrically arranged on both sides of the second connecting plate 4, and the tie rods 41 are welded and fixed to the second connecting plate 4. The tie rods 41 are also angle irons, and the inner angles of the two tie rods 41 on the same second connecting plate 4 are arranged back to back. Two adjacent lower chord members 11 located in the same longitudinal direction are connected by tie rods 41 to improve the strength of the upper structure; thus completing the reinforcement construction of the upper structure.

[0065] S2: After the superstructure is reinforced, the sliding bearings are pre-assembled at the predetermined positions.

[0066] Reference Figure 9 , Figure 10 and Figure 11 The sliding support includes an upper base plate 3, a lower base plate 5, and a rubber gasket 53 disposed between the upper base plate 3 and the lower base plate 5. Both the upper base plate 3 and the lower base plate 5 are horizontally arranged, with the upper base plate 3 positioned above the lower base plate 5. The top surface of the upper base plate 3 is welded and fixed to the bottom surface of the lower chord 11 to achieve connection between the upper base plate 3 and the bottom surface of the upper structure. Two symmetrically arranged and parallel limiting plates 51 are fixedly connected to the top surface of the lower base plate 5, and two symmetrically arranged and parallel limiting baffles 52 are also fixedly connected to the top surface of the lower base plate 5. The limiting plates 51 and the limiting baffles 52 are perpendicular to each other, thus forming a placement space on the top surface of the lower base plate 5 between the two limiting plates 51 and the two limiting baffles 52. The rubber gasket 53 is located within this placement space. Multiple stiffening ribs 521 are fixedly connected to the sides of the two limiting baffles 52 that are far apart from each other. The multiple stiffening ribs 521 on the same limiting baffle 52 are evenly distributed along the length direction of the limiting baffle 52. In this embodiment, the limiting plate 51 is a steel plate.

[0067] Reference Figure 5 and Figure 6 Four waist-shaped holes 31 are provided on the top surface of the upper base plate 3 in a matrix distribution. The length direction of the waist-shaped holes 31 is consistent with the length direction of the lower chord 11; and the lower chord 11 is located between the four waist-shaped holes 31.

[0068] Reference Figure 11 , Figure 12 and Figure 13 The upper base plate 3 and the lower base plate 5 are connected by screws 54, which clamp the rubber gasket 53 between the upper base plate 3 and the lower base plate 5, thereby releasing displacement through the elastic deformation of the rubber gasket 53. Specifically, the number of screws 54 is consistent with the number of oblong holes 31 and corresponds one-to-one. The screws 54 pass vertically through the oblong holes 31 corresponding to their positions, and the screws 54 can slide laterally within the oblong holes 31. Both the lower base plate 5 and the rubber gasket 53 are provided with through holes 55 through which the screws 54 can pass. The screws 54 pass vertically through the lower base plate 5 and the rubber gasket 53 through the through holes 55.

[0069] Reference Figure 11 and Figure 12 The screw 54 is threaded with two lower connecting nuts 541 arranged side by side on the lower base plate 5. The screw 54 is provided with a pad 542, a washer 543 and an upper connecting nut 544 on the upper base plate 3, arranged from bottom to top. The pad 542 is also provided with a waist-shaped hole 31, and the waist-shaped hole 31 on the pad 542 corresponds to the waist-shaped hole 31 on the upper base plate 3. The upper connecting nut 544 is threaded to the screw 54, and there are two upper connecting nuts 544 on the same screw 54, arranged side by side on the upper base plate 3.

[0070] Therefore, the screw 54 is vertically passed through the waist-shaped hole 31 on the upper base plate 3, and the top of the screw 54 extends to the top of the upper base plate 3. The pad 542 and the washer 543 are then placed on the screw 54 in sequence, so that the top surface of the upper base plate 3 supports the bottom surface of the pad 542. Then, the two upper connecting nuts 544 are threaded onto the screw 54 in sequence, thereby realizing the connection between the screw 54 and the upper base plate 3. Next, the limiting plate 51 and the limiting baffle 52 are welded sequentially to the top surface of the lower base plate 5, so that the two limiting plates 51 and the two limiting baffles 52 form a placement space. Then, the rubber gasket 53 is placed in the placement space, so that the bottom end of the screw 54 vertically passes through the through hole 55 through the rubber gasket 53 and the lower base plate 5. Finally, the two lower connecting nuts 541 are sequentially threaded onto the screw 54, so that the top end of the lower connecting nuts 541 supports the lower base plate 5. At this time, there is a certain gap between the upper base plate 3 and the rubber gasket 53. Afterward, as the lower connecting nuts 541 continue to rotate, the lower connecting nuts 541 drive the lower base plate 5 and the rubber gasket 53 to move upward until the top surface of the rubber gasket 53 is in contact with the bottom surface of the upper base plate 3. At this time, a scale line is marked on the screw 54 with a marker pen, and the scale line is flush with the bottom end of the lower connecting nut 541 located below.

[0071] S3: Add a new structural column 6, and pre-embed the bolt 54 connected to the sliding support into the structural column 6, and reserve the construction operation surface without pouring.

[0072] Reference Figure 11 , Figure 12 and Figure 13 According to the drawings, the foundation is reinforced at the predetermined location. After the foundation is reinforced, structural columns 6 are poured on the reinforced foundation so that the structural columns 6 are located below the upper base plate 3, and the bottom ends of the four bolts 54 are all pre-embedded in the structural columns 6. A construction operation surface is reserved between the lower connecting nut 541 and the structural column 6 without pouring. In other embodiments, the structural columns 6 can be replaced by structural foundations, structural beams, or other bases.

[0073] S4: Backing sliding support.

[0074] Reference Figure 14Two support frames are installed on the ground, symmetrically positioned on both sides of the structural column 6. A jack 61 is installed at the top of each support frame, with the telescopic end of the jack 61 facing upwards. A return support 62 is installed on the telescopic end of the jack 61, allowing the jack 61 to return the lower chord 11 via the return support 62. In this example, the return distance of the jack 61 must not exceed 20mm; preferably, the return distance is 15mm. The return distance of the jack 61 can be determined by the scale lines. After the jack 61 returns, the lower connecting nut 541 is tightened. This method of tightening the jack 61 and lower connecting nut 541 effectively reduces the impact of the original steel roof truss deflection on the sliding support, allowing the sliding support to work collaboratively with the existing structure.

[0075] S5: Pour grouting material onto the construction surface.

[0076] Reference Figure 15 and Figure 16 High-strength grout is poured onto the construction surface, and the entire reinforcement process is completed after the high-strength grout has cured.

[0077] The implementation principle of the reinforcement method for existing structures using the back-support process and the addition of sliding supports in this application embodiment is as follows: By adding sliding supports and modifying the position of the original support 1, the A-frame truss will transmit horizontal axial force to the top of the structural column 6 at the sliding support. The added sliding support with a waist-shaped hole 31 can release horizontal displacement, solving the problem caused by horizontal force on the sliding support and saving on the amount of work required due to horizontal force. Simultaneously, the back-support technology ensures a tighter connection between the sliding support and the existing structure, enabling more effective force coordination and significantly improving the overall structural integrity. By adding sliding supports and modifying the position of the original support 1, the existing structure does not need to be demolished, reducing the construction period and saving on demolition and additional steel structure materials, resulting in significant economic benefits.

[0078] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A reinforcement method for existing structures using a top-support technique with added sliding bearings, characterized in that: Includes the following steps; S1: Reinforcement work is carried out on the superstructure of the existing structure; S2: After the superstructure reinforcement construction is completed, the sliding bearings are pre-assembled at the predetermined positions; S3: Add a new structural column (6) and embed the screw rod (54) connected to the sliding support into the structural column (6), and reserve the construction operation surface without pouring; S4: Backing sliding support; S5: Pour grouting material onto the construction work surface; The sliding support includes an upper base plate (3) connected to the bottom surface of the upper structure, a lower base plate (5) located below the upper base plate (3), and a rubber pad (53) disposed between the upper base plate (3) and the lower base plate (5). The upper base plate (3) and the lower base plate (5) are connected by a screw (54) so ​​that the upper base plate (3) and the lower base plate (5) clamp the rubber pad (53), thereby releasing the displacement through the elastic deformation of the rubber pad (53). The top surface of the upper base plate (3) is provided with a waist-shaped hole (31) corresponding to the position of the screw (54). The screw (54) passes vertically through the waist-shaped hole (31) and can slide laterally within the waist-shaped hole (31). The bottom plate (5) has a limiting plate (51) and a limiting baffle (52) for limiting the rubber gasket (53) fixedly connected to its top surface; The screw (54) is threaded with a lower connecting nut (541) and an upper connecting nut (544). The upper connecting nut (544) is used to connect the screw (54) to the upper base plate (3), and the lower connecting nut (541) is used to connect the lower base plate (5) to the screw (54). The screw (54) is also provided with a pad (542) and a washer (543), the washer (543) being located between the pad (542) and the upper connecting nut (544).

2. The reinforcement method for existing structures using the top-support process to add sliding supports as described in claim 1, characterized in that: The limiting plate (51) and the limiting baffle (52) enclose a placement space, and the rubber gasket (53) is placed in the placement space.

3. The reinforcement method for existing structures using the top-support process to add sliding supports as described in claim 1, characterized in that: In S4, there are also two support frames symmetrically arranged on both sides of the structural column (6). A jack (61) is installed on the top of each of the two support frames. The jack (61) returns the bottom surface of the upper structure through the return support (62).

4. The reinforcement method for existing structures using the top-support process to add sliding supports as described in claim 1, characterized in that: The limiting baffle (52) has multiple stiffening ribs (521) fixedly connected to one side.

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