Reinforcement structure for compression member of existing grid structure and reinforcement method thereof

Abstract

The present application discloses a reinforcement structure for a compression member of an existing grid structure and a reinforcement method thereof. The reinforcement structure includes: an outer sleeve and end constraint devices. The outer sleeve includes two sleeve shells, and the two sleeve shells are buckled and connected. The end constraint devices are located at both ends of the outer sleeve. The end constraint device includes a connecting cylinder, a support platform and a constraint body. The connecting cylinder is fixedly sleeved on the existing member, the support platform is connected to the connecting cylinder, and the support platform is limited at the end of the outer sleeve to limit the movement of the outer sleeve along the length direction of the existing member. The constraint body is arranged on the support platform, and the constraint body and the outer sleeve are in limit cooperation to limit the rotation of the outer sleeve around the existing member. The outer sleeve of the reinforcement structure of the present application is formed by bending a metal plate, which is convenient for flexible adjustment according to the size of the existing member. The end constraint devices arranged at both ends can form multi-directional constraints on the existing member, which facilitates the smooth installation of the outer sleeve and can effectively improve the compressive stability bearing capacity of the existing member.

Description

Technical Field

[0001] The present invention relates to the field of steel structures and space structures, and particularly relates to a reinforcement structure and a reinforcement method for a compression member of an existing grid structure. Background Art

[0002] Grid structures are widely used in projects such as large buildings, bridges, and stadiums, especially in situations where large loads are borne. Due to uneven stress, material fatigue, and improper construction, etc., the compression members of grid structures often become unstable or deformed, resulting in a reduction in the safety of the entire structure. In order to strengthen the performance of the members, the members can be reinforced, such as installing steel pipes on the outer side of the members. However, during the reinforcement process of compression members, there is often a lack of suitable circular steel pipes for reinforcement. The diameters and shapes of different members vary, and the existing specifications of circular steel pipes cannot match compression members of various different sizes, resulting in that the reinforcement operation often requires customizing special - specification steel pipes or adopting complex processing techniques to complete the reinforcement operation. This not only increases the cost of reinforcement but also limits the applicability and flexibility of the reinforcement plan.

[0003] In view of this, the present invention is specifically proposed. Summary of the Invention

[0004] To solve one of the above - mentioned technical problems, the present invention provides a reinforcement structure and a reinforcement method for a compression member of an existing grid structure.

[0005] The present invention adopts the following technical solutions:

[0006] On the one hand, an embodiment of the present application provides a reinforcement structure for a compression member of an existing grid structure, including:

[0007] An existing member;

[0008] An outer sleeve, the outer sleeve includes two sleeve shells, the two sleeve shells are respectively arranged on both sides of the existing member, the two sleeve shells are buckled and connected, and the two sleeve shells enclose a through - groove for the existing member to pass through. The sleeve shell is formed by bending a metal plate;

[0009] An end - constraint device, the end - constraint device is located at both ends of the outer sleeve. The end - constraint device includes a connecting cylinder, a supporting platform, and a constraint body. The connecting cylinder is fixedly sleeved on the existing member, the supporting platform is connected to the connecting cylinder, and the supporting platform is limited at the end of the outer sleeve to limit the movement of the outer sleeve along the length direction of the existing member. The constraint body is arranged on the supporting platform, and the constraint body and the outer sleeve are in limit cooperation to limit the rotation of the outer sleeve around the existing member.

[0010] Optionally, the sleeve housing includes two main housing walls, which are connected to each other and form an included angle therebetween;

[0011] On one side of each of the two main housing walls facing away from each other, there is provided a fitting edge;

[0012] In a state where the two sleeve housings are buckled together, the main housing walls of the two sleeve housings enclose to form the through groove, and the fitting edges of the two sleeve housings are in contact with each other;

[0013] The fitting edges of the two sleeve housings in contact with each other are connected and fixed by fasteners.

[0014] Optionally, the reinforcement structure includes a plurality of stiffening rib plates;

[0015] Each of the stiffening rib plates is welded to the outer side surface of the sleeve housing, and the stiffening rib plates are arranged at intervals in sequence along the length direction of the sleeve housing;

[0016] The stiffening rib plate extends along the width direction of the outer sleeve.

[0017] Optionally, the reinforcement structure includes a plurality of internal reinforcing ribs, each of the internal reinforcing ribs is arranged on the inner side surface of the sleeve housing, and the internal reinforcing ribs are arranged at intervals in sequence along the length direction of the sleeve housing;

[0018] The internal reinforcing ribs are respectively connected to the two main housing walls of the sleeve housing.

[0019] Optionally, the through groove includes an angular space located between two adjacent main housing walls;

[0020] A plurality of the restraint bodies are arranged on the support platform, and the restraint bodies are arranged at intervals in sequence along the circumferential direction of the connecting cylinder;

[0021] Each of the restraint bodies is located in the through groove, and each of the restraint bodies extends into the corresponding angular space to limit the rotation of the outer sleeve around the existing rod member.

[0022] Optionally, the restraint body includes two sheet bodies, one ends of the two sheet bodies facing each other are connected, and the other ends of the two sheet bodies facing each other are separated;

[0023] The two sheet bodies are welded to the support platform;

[0024] The two sheet bodies are respectively attached to the main housing walls on both sides of the corresponding angular space.

[0025] Optionally, the end restraint device includes two restraint housings, and connecting plates are respectively arranged on both sides of the restraint housing;

[0026] Both of the two restraint housings have a semi-support platform and a semi-connecting cylinder;

[0027] In a state where the two constraint shells are buckled, the semi-support platforms of the two constraint shells are spliced to form a complete support platform, and the semi-connection cylinders of the two constraint shells are spliced to form a complete connection cylinder;

[0028] The fastener can connect the connecting plates on the two constraint shells, so that the two constraint shells are clamped and fixed to the existing member. Optionally, the reinforcement structure includes a gasket;

[0029] The gasket is arranged between the outer wall of the existing member and the inner wall of the connection cylinder.

[0030] In a second aspect, an embodiment of the present application provides a reinforcement method for a reinforcement structure of a compression member of an existing grid structure, including:

[0031] Step S1: Prepare a reinforcement structure member with a corresponding specification according to the size and usage requirements of the existing member. The reinforcement structure member includes an outer sleeve and an end constraint device;

[0032] Step S2: Install the two sleeve shells of the outer sleeve on the outer side of the existing member, so that the outer sleeve covers the existing member, and adjust the position of the outer sleeve so that there is a gap between the existing member and the inner surface of the outer sleeve;

[0033] Step S3: Install the two end constraint devices on the existing member at both ends of the outer sleeve to fix the outer sleeve;

[0034] Among them, in step S2, the ratio of the length of the outer sleeve to the existing member is not less than 0.7.

[0035] Optionally, in step S1, it includes the step of processing the outer sleeve:

[0036] Step S11: Cut out a metal plate with a corresponding size according to the size of the existing member;

[0037] Step S12: Use a metal folding machine to perform multiple bending treatments on the metal plate to form a sleeve shell. The sleeve shell has two main shell walls, the two main shell walls have an included angle, and a fitting edge is formed on the back side of each of the two main shell walls;

[0038] Step S13: Place the two sleeve shells on both sides of the existing member respectively and buckle them so that the opposite fitting edges of the two sleeve shells are fitted together;

[0039] Step S14: Connect and fix the fitting edges that are fitted together in the two sleeve shells through bolts.

[0040] By adopting the above technical solutions, the present application has the following beneficial effects:

[0041] The outer sleeve of the reinforcement structure in this application is formed by bending a metal plate, which is convenient for flexible adjustment according to the size of the member to be reinforced. End restraint devices are provided at both ends of the reinforcement structure, which can form multi-directional restraints on the existing member, facilitating the smooth installation of the outer sleeve. Compared with the existing conventional operations, it can also improve the reinforcement effect of the member and avoid the occurrence of low-order buckling of the existing member. The reinforcement structure in this application can effectively improve the compressive stability bearing capacity of the member and has broad application prospects.

[0042] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] As part of this application, the accompanying drawings are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention, but do not constitute an improper limitation to the present invention. Obviously, the accompanying drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. In the drawings:

[0044] Figure 1 Showing the structural schematic diagram of the reinforcement structure of the compression member of the existing grid structure provided by the embodiment of this application;

[0045] Figure 2 Showing the structural schematic diagram of the sleeve housing in the reinforcement structure of the compression member of the existing grid structure provided by the embodiment of this application;

[0046] Figure 3 Showing the side view of the sleeve housing in the reinforcement structure of the compression member of the existing grid structure provided by the embodiment of this application;

[0047] Figure 4 Showing the three-dimensional structural schematic diagram of the sleeve housing in the reinforcement structure of the compression member of the existing grid structure provided by the embodiment of this application;

[0048] Figure 5 Showing the state diagram of hiding a set of sleeve housings in the reinforcement structure of the compression member of the existing grid structure provided by the embodiment of this application;

[0049] Figure 6 Showing the structural schematic diagram of the cooperation of the end restraint device, the existing member and the outer sleeve in the reinforcement structure of the compression member of the existing grid structure provided by the embodiment of this application;

[0050] Figure 7 Showing the partial structural diagram of the reinforcement structure of the compression member of the existing grid structure provided by the embodiment of this application;

[0051] Figure 8Schematic structural diagram of the restraint housing of the end restraint device at one end in the reinforcement structure of the compression member of the existing grid structure provided by the embodiments of the present application;

[0052] Figure 9 Schematic structural diagram of the restraint housing of the end restraint device at the other end in the reinforcement structure of the compression member of the existing grid structure provided by the embodiments of the present application.

[0053] In the figure:

[0054] 1. Existing member; 2. Outer sleeve; 21. Sleeve housing; 211. Main shell wall; 212. Fitting edge; 213. Stiffening rib plate; 214. Internal strengthening rib; 22. Through groove; 221. Angular space; 3. End restraint device; 31. Restraint housing; 311. Half connection cylinder; 312. Half support platform; 313. Connection plate; 314. Restraint body; 3a. Connection cylinder; 3b. Support platform; 4. Gasket; 5. Fastener.

[0055] It should be noted that these drawings and text descriptions are not intended to limit the scope of the concept of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0056] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0057] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0058] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0059] Such as Figures 1 to 9As shown in the figure, the embodiment of the present application provides a reinforcement structure for a compression member of an existing grid structure, including: an existing member 1, an outer sleeve 2, and an end restraint device 3. The outer sleeve 2 includes two sleeve shells 21, which are respectively arranged on both sides of the existing member 1. The two sleeve shells 21 are buckled and connected, and the two sleeve shells 21 enclose a through groove 22 for the existing member 1 to pass through. The sleeve shell 21 is formed by bending a metal plate. The end restraint device 3 is located at both ends of the outer sleeve 2. The end restraint device 3 includes a connecting cylinder 3a, a support platform 3b, and a restraint body 314. The connecting cylinder 3a is fixedly sleeved on the existing member 1. The support platform 3b is connected to the connecting cylinder 3a, and the support platform 3b is limited at the end of the outer sleeve 2 to restrict the outer sleeve 2 from moving along the length direction of the existing member 1. The restraint body 314 is arranged on the support platform 3b, and the restraint body 314 and the outer sleeve 2 are in limit cooperation to restrict the outer sleeve 2 from rotating around the existing member 1. In the embodiment of the present application, the sleeve shell 21 can be formed by bending a steel plate with a metal folding machine, and the thickness can be adjusted according to the size of the member to be reinforced, generally 2-14 mm. The length of the outer sleeve 2 can be 60%-80% of the length of the existing member 1.

[0060] The reinforcement structure provided by the embodiment of the present application is different from the traditional circular steel pipe reinforcement method. The outer sleeve 2 in the reinforcement structure of the present application is not a circular pipe, but a bent plate shell formed by bending a metal plate. The present application can flexibly adjust the specifications and dimensions of the metal plate according to the specific dimensions of the existing member 1, and adaptively adjust the bending position of the metal folding machine to process the outer sleeve 2 that meets the size requirements, solving the problems brought by the size mismatch in the existing member reinforcement technology.

[0061] The outer sleeve 2 of the reinforcement structure of the present application is formed by bending a metal plate, which is convenient for flexible adjustment according to the size of the member to be reinforced, avoiding the problems brought by the size mismatch in the traditional circular steel pipe reinforcement method. This folding plate reinforcement method can be widely applied to compression members of various different sizes, greatly improving the adaptability of the reinforcement device. End restraint devices 3 are provided at both ends of the reinforcement structure, facilitating the smooth installation of the outer sleeve 2. The end restraint device 3 can form multi-directional constraints on the existing member 1, avoiding the occurrence of low-order buckling of the existing member 1, and thus improving the stable bearing capacity. The reinforcement structure of the present application can effectively improve the compression stable bearing capacity of the existing member 1 and has a wide application prospect.

[0062] In some possible implementation schemes, such as Figure 1 and Figure 2As shown, the sleeve housing 21 includes two main shell walls 211. The two main shell walls 211 are connected. There are edges and angles between the two main shell walls 211. On the opposite sides of the two main shell walls 211, there are fitting edges 212. In the state where the two sleeve housings 21 are buckled, the main shell walls 211 of the two sleeve housings 21 enclose a through groove 22. The fitting edges 212 of the two sleeve housings 21 are in contact with each other, and the fitting edges 212 of the two sleeve housings 21 in contact with each other are connected and fixed by a fastener 5.

[0063] The sleeve housing 21 is bent by a metal folding machine to form two flat main shell walls 211 and two flat fitting edges 212. There are creases formed between adjacent ones of each main shell wall 211 and each fitting edge 212. The cross-section of the through groove 22 can be square. An existing rod 1 is arranged through the through groove 22. There is a gap between the existing rod 1 and the inner wall of the main shell wall 211 to ensure uniform force between the outer sleeve 2 and the existing rod 1. This gap can meet the requirements by adjusting the size of the outer sleeve 2. The design of the reinforcement structure in this application can flexibly adapt to rods of different diameters, solving the problem of size mismatch existing in traditional reinforcement methods.

[0064] The fastener 5 can be a bolt. The fitting edges 212 of the two sleeve housings 21 in contact with each other can be connected and fixed by bolts. The reinforcement structure in this application does not require welding operations. The outer sleeve 2 can be effectively connected and fixed through bolts, effectively avoiding the possible degradation and damage of material properties of the original structure due to welding. The structure of the reinforcement structure in this application is simple, and the assembly process is convenient to install.

[0065] In some possible implementation schemes, such as Figure 1 and Figure 2 As shown, the reinforcement structure includes a plurality of stiffening rib plates 213. Each stiffening rib plate 213 is welded to the outer side surface of the sleeve housing 21. The stiffening rib plates are arranged at intervals in sequence along the length direction of the sleeve housing 21. The stiffening rib plates extend along the width direction of the outer sleeve 2.

[0066] The stiffening rib plates 213 can be made of metal plates with a thickness of 2 mm to 6 mm and are fixed to the sleeve housing 21. The number and positions of the stiffening rib plates 213 can be adjusted according to the stress state of the existing rod 1. The lateral stiffness of the sleeve housing 21 is enhanced through the stiffening rib plates 213, thereby improving the compressive capacity and stability of the reinforcement device. The stiffening rib plates 213 can be fixed to the sleeve housing 21 by welding to ensure tight connection between the stiffening rib plates 213 and the sleeve housing 21.

[0067] In some possible implementation schemes, such as Figure 3 and Figure 4As shown, the reinforcement structure includes a plurality of internal stiffeners 214. Each internal stiffener 214 is disposed on the inner side surface of the sleeve housing 21. The internal stiffeners 214 are sequentially arranged at intervals along the length direction of the sleeve housing 21. The internal stiffeners 214 are respectively connected to the two main shell walls 211 of the sleeve housing 21.

[0068] The shape of the internal stiffener 214 can be triangular and is respectively fixed on the two main shell walls 211 of the sleeve housing 21. Thereby, the stiffness of the sleeve housing 21 is increased and the occurrence of the low-order buckling of the compression bar is crossed to increase the stable bearing capacity.

[0069] In some possible implementation schemes, in combination with Figure 2 、 Figure 5 and Figure 6 As shown, the through groove 22 includes an angular space 221 located between two adjacent main shell walls 211. A plurality of restraining bodies 314 are arranged on the support platform 3b. The restraining bodies 314 are sequentially arranged at intervals along the circumferential direction of the connecting cylinder 3a. Each restraining body 314 is located within the through groove 22. Each restraining body 314 extends into the corresponding angular space 221 to restrict the outer sleeve 2 from rotating around the existing rod 1. The end restraint device 3 is used to fix the position of the outer sleeve 2 and can effectively restrain the rotation and sliding of the outer sleeve 2.

[0070] The two sleeve housings 21 of the outer sleeve 2 have a total of four main shell walls 211. The four main shell walls 211 are sequentially arranged along the circumferential direction of the existing rod body. An angular space 221 is formed between two adjacent main shell walls 211. The support platform 3b can be an annular plate. Each restraining body 314 protrudes from one side of the annular plate in the thickness direction. Each restraining body 314 is respectively located within the corresponding angular space 221. The four restraining bodies 314 respectively bear the resistance in the rotation direction of the outer sleeve 2, which is beneficial to extending the service life. It should be noted that among the two end restraint devices 3, the support platform 3b on at least one of them is provided with the restraining bodies 314.

[0071] In some possible implementation schemes, as Figure 6 shown, the restraining body 314 includes two sheet bodies. One end of the two sheet bodies is connected to each other, and the other end of the two sheet bodies is separated from each other. The two sheet bodies are both welded to the support platform 3b. The two sheet bodies are respectively attached to the main shell walls 211 on both sides of the corresponding angular space 221.

[0072] The restraining body 314 is generally a "V"-shaped structure. One side of the tip of the restraining body 314 extends into the angular space 221, which can be conveniently attached to the main shell walls 211 on both sides of the angular space 221 respectively, and can effectively play a role in restricting the rotation of the outer sleeve 2.

[0073] In some possible implementation schemes, as Figures 6 to 9As shown in the figure, the end constraint device 3 includes two constraint shells 31. Connecting plates 313 are respectively arranged on both sides of the constraint shell 31. Both constraint shells 31 have a semi-supporting platform 312 and a semi-connecting cylinder 311. In the state where the two constraint shells 31 are buckled together, the semi-supporting platforms 312 of the two constraint shells 31 are spliced to form a complete supporting platform 3b, and the semi-connecting cylinders 311 of the two constraint shells 31 are spliced to form a complete connecting cylinder 3a. The fastener 5 can connect the connecting plates 313 on the two constraint shells 31, so that the two constraint shells 31 are clamped and fixed to the existing member 1.

[0074] The connecting plate 313 can be L-shaped, including a first connecting section and a second connecting section that are perpendicular to each other. The first connecting section extends along the radial direction of the semi-supporting platform 312, and the second connecting section extends along the length direction of the semi-connecting cylinder 311. Connecting holes are provided on both the first connecting section and the second connecting section, which is convenient for the fastener 5 to pass through the connecting holes on the two constraint shells 31 to connect and fix the two constraint shells 31. The fastener 5 can be a bolt.

[0075] In some possible implementation schemes, such as Figures 7 to 9 As shown in the figure, the reinforcement structure includes a gasket 4, and the gasket 4 is arranged between the outer wall of the existing member 1 and the inner wall of the connecting cylinder 3a.

[0076] In this implementation scheme, a gasket 4 is arranged between the end constraint device 3 and the existing member 1. The connecting plates 313 on the two constraint shells 31 are fixed together by pre-tightening bolts to complete the assembly of the end constraint. The pre-tightening bolts generate circumferential constraints between the gasket 4 and the existing member 1. At the same time, the constraint body 314 and the outer sleeve 2 are in limit fit to jointly achieve the effect of fixing the outer sleeve 2. The setting of the end constraint device 3 enhances the reinforcement effect of the existing member 1.

[0077] The gasket 4 has excellent deformation resistance, pressure resistance and corrosion resistance. The gasket 4 is wrapped between the connecting cylinder 3a of the end constraint device 3 and the existing member 1 to fill the gap and improve the overall strength of the reinforcement area. The thickness of the gasket 4 is generally 1 mm to 3 mm, and the width covers the contact area between the connecting cylinder 3a and the existing member 1, increasing the cross-sectional area of the exposed part of the existing member 1 and effectively improving its bearing capacity.

[0078] The embodiment of the present application also provides a reinforcement method for the reinforcement structure of the compression member of the existing grid structure, including:

[0079] Step S1: Prepare the corresponding specifications of the reinforcement structure members according to the size and usage requirements of the existing member 1. The reinforcement structure members include an outer sleeve 2 and an end constraint device 3;

[0080] In this step, select the sleeve shell 21, stiffening rib plates, and end constraint devices 3 with appropriate thickness and specifications according to the dimensions and usage requirements of the existing member 1 to prepare for the subsequent steps.

[0081] Step S2: Install the two sleeve shells 21 of the outer sleeve 2 on the outside of the existing member 1 so that the outer sleeve 2 covers the existing member 1. Adjust the position of the outer sleeve 2 so that there is a gap between the inner surface of the existing member 1 and the outer sleeve 2.

[0082] This step also includes the process of connecting and fixing the two sleeve shells 21 by bolts. During this process, adjust the position of the outer sleeve 2 so that there is a gap between the inner surface of the existing member 1 and the outer sleeve 2 to ensure that the outer sleeve 2 can be evenly stressed.

[0083] After step S2, it also includes the process of installing the stiffening rib plates 213 on the sleeve shell 21. According to the stress state of the existing member 1, select the appropriate number and position of the stiffening rib plates 213 and fix them on the sleeve shell 21 to enhance the lateral stiffness of the sleeve shell 21.

[0084] Step S3: Install the two end constraint devices 3 at both ends of the existing member 1 where the outer sleeve 2 is located to fix the outer sleeve 2.

[0085] Among them, in step S2, the ratio of the length of the outer sleeve to the existing member should not be less than 0.7.

[0086] By installing the two end constraint devices 3 at both ends of the existing member 1 where the outer sleeve 2 is located, it can ensure that the orientation of the outer sleeve 2 can be fixed and effectively restrict the outer sleeve 2 from sliding along the existing member 1 and rotating around the existing member 1.

[0087] In step S3, it also includes the step of installing the gasket 4. Place the gasket 4 between the connecting cylinder 3a of the end constraint device 3 and the existing member 1 to ensure filling the gap and improving the strength of the reinforcement area.

[0088] Optionally, in step S1, it includes the step of processing the outer sleeve 2:

[0089] Step S11: Cut out a metal plate with corresponding dimensions according to the dimensions of the existing member 1;

[0090] Step S12: Use a metal folding machine to perform multiple bending treatments on the metal plate to form the sleeve shell 21. The sleeve shell 21 has two main shell walls 211, the two main shell walls 211 have an included angle, and a fitting edge 212 is formed on the opposite side of the two main shell walls 211;

[0091] Step S13: Place the two sleeve shells 21 on both sides of the existing member 1 respectively and buckle them so that the opposite fitting edges 212 of the two sleeve shells 21 are in contact.

[0092] Step S14: Connect and fix the mating edges 212 of the two sleeve housings 21 together by bolts.

[0093] The reinforcement structure for the compression members of the existing grid structure in this application has multiple reinforcement mechanisms. First, by assembling the outer sleeve 2 with a gap from the existing member 1, the occurrence of low-order buckling of the existing member 1 is restricted, further enhancing the stability of the existing member 1, avoiding the early instability of the existing member 1, and improving the stable bearing capacity. Second, through the combination of the connecting cylinder 3a and the gasket 4 at the end restraint device 3, the interfacial contact area between the end restraint device 3 and the existing member 1 is increased, enhancing the reinforcement effect.

[0094] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-mentioned technical content to form equivalent embodiments with equivalent changes without departing from the technical solution of the present invention. However, as long as it does not depart from the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A reinforcement structure for a compression member of an existing grid structure, characterized in that, Comprising: Existing member; Outer sleeve, the outer sleeve includes two sleeve shells, the two sleeve shells are respectively arranged on both sides of the existing member, the two sleeve shells are snap-connected, the two sleeve shells enclose a through groove for the existing member to pass through, the sleeve shell is formed by bending a metal plate, the sleeve shell has two main shell walls, the two main shell walls are connected, there is an included angle between the two main shell walls, and the through groove includes an angular space located between two adjacent main shell walls; End constraint device, the end constraint device is located at both ends of the outer sleeve, the end constraint device includes a connecting cylinder, a support platform and a plurality of constraint bodies, the connecting cylinder is fixedly sleeved on the existing member, the support platform is connected to the connecting cylinder, and the support platform is limited at the end of the outer sleeve to limit the movement of the outer sleeve along the length direction of the existing member, the constraint bodies are arranged on the support platform, each of the constraint bodies is sequentially arranged at intervals along the circumferential direction of the connecting cylinder, the constraint body includes two sheet bodies, one end of the two sheet bodies facing each other is connected, the other end of the two sheet bodies facing each other is separated, the two sheet bodies are welded to the support platform, each of the constraint bodies is located in the through groove, and the two sheet bodies respectively fit on the main shell walls on both sides of the corresponding angular space to limit the rotation of the outer sleeve around the existing member.

2. The reinforcement structure for a compression member of an existing grid structure according to claim 1, characterized in that On one side of the two main shell walls facing away from each other, there are fitting edges provided; In the state where the two sleeve shells are snap-connected, the main shell walls of the two sleeve shells enclose the through groove, and the fitting edges of the two sleeve shells are in contact with each other; The fitting edges of the two sleeve shells in contact with each other are connected and fixed by fasteners.

3. The reinforcement structure for the compression member of the existing grid structure according to claim 2, characterized in that, Including a plurality of stiffening rib plates; Each of the stiffening rib plates is welded to the outer side surface of the sleeve shell, and each of the stiffening rib plates is sequentially arranged at intervals along the length direction of the sleeve shell; The stiffening rib plates extend along the width direction of the outer sleeve.

4. The reinforcement structure for the compression member of the existing grid structure according to claim 2, characterized in that Including a plurality of internal reinforcing ribs, each of the internal reinforcing ribs is arranged on the inner side surface of the sleeve shell, and each of the internal reinforcing ribs is sequentially arranged at intervals along the length direction of the sleeve shell; The internal reinforcing ribs are respectively connected to the two main shell walls of the sleeve shell.

5. The reinforcement structure for the compression member of the existing grid structure according to claim 1, characterized in that, The end constraint device includes two constraint shells, and connecting plates are respectively arranged on both sides of the constraint shell; Both of the two constraint shells have a semi-support platform and a semi-connecting cylinder; In the state where the two constraint shells are snap-connected, the semi-support platforms of the two constraint shells are spliced to form a complete support platform, and the semi-connecting cylinders of the two constraint shells are spliced to form a complete connecting cylinder; Fasteners can connect the connecting plates on the two constraint shells, so that the two constraint shells are clamped and fixed on the existing member.

6. The reinforcement structure for the compression member of the existing grid structure according to any one of claims 1-5, characterized in that, Including gaskets; The gaskets are arranged between the outer wall of the existing member and the inner wall of the connecting cylinder.

7. A reinforcement method for a compression member of an existing grid structure according to any one of claims 1-6, characterized in that, Comprising: Step S1, prepare a reinforcement structural member with corresponding specifications according to the size and use requirements of the existing member, and the reinforcement structural member includes an outer sleeve and an end constraint device; Step S2: Install the two sleeve shells of the outer sleeve on the outside of the existing member so that the outer sleeve covers at least a part of the existing member, and adjust the position of the outer sleeve so that there is a gap between the existing member and the inner surface of the outer sleeve; Step S3: Install the two end restraint devices on the existing member at both ends of the outer sleeve to fix the outer sleeve; Wherein, in Step S2, the ratio of the length of the outer sleeve to the existing member is not less than 0.

7.

8. The reinforcement method according to claim 7, characterized in that, In Step S1, it includes the step of processing the outer sleeve: Step S11: Cut out a metal plate with a corresponding size according to the size of the existing member; Step S12: Use a metal folding machine to perform multiple bending treatments on the metal plate to form a sleeve shell. The sleeve shell has two main shell walls with an included angle, and fitting edges are formed on the opposite sides of the two main shell walls; Step S13: Place the two sleeve shells on both sides of the existing member respectively and buckle them so that the opposite fitting edges of the two sleeve shells are in contact; Step S14: Connect and fix the fitting edges in contact in the two sleeve shells through bolts.

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