A method for reinforcing a steel structure with a bushing

Abstract

The application provides a bushing type steel structure reinforcing method, relates to the field of steel structure repairing and reinforcing, and aims at the problem that steel structure pipes are inconvenient to reinforce, thereby being difficult to repair and reinforce. The method comprises the following steps: an operation opening is formed on a pipe to be reinforced, and a plurality of split inner reinforcing pieces are welded in the pipe to be reinforced, and the inner reinforcing pieces are spliced into a ring in the pipe to be reinforced, so that the connecting area between the inner reinforcing pipe and the pipe to be reinforced is increased, the combination strength is improved, and the reinforcing and reinforcing effect on the pipe to be reinforced is ensured.

Description

Technical Field

[0001] The invention relates to the field of steel structure repair and reinforcement, and in particular to a bushing type steel structure reinforcement method. Background Art

[0002] Grid steel structures are mainly used in industrial buildings and civil buildings such as industrial plants, warehouses, gymnasiums, exhibition halls, conference halls, terminals, stations, office buildings, etc., and the rods of grid steel structures are usually used as the main components of the load-bearing and load-bearing structures in the above-mentioned buildings.

[0003] The grid steel structure is composed of multiple rods connected by nodes in a certain grid form to form a spatial structure. The grid steel structure is made of steel and is lighter than the concrete structure. It can reduce the load on the foundation and supporting structure, and also save material costs. When the grid steel structure is disturbed by the outside world, it may cause damage to individual or local pipes. Since a single pipe is often welded to multiple other pipes, it is inconvenient to replace the damaged pipe as a whole. The traditional reinforcement method is to lay a reinforcement pipe on the outside of the pipe, but its reinforcement effect is limited. The connection range between the reinforcement pipe and the pipe to be reinforced is small and the strength is low, which makes it difficult to reinforce and strengthen the weak structural positions of the damaged pipe. Summary of the Invention

[0004] The purpose of the present invention is to address the defects of the existing technology and provide a bushing-type steel structure reinforcement method. By opening an operating port on the pipe to be reinforced, multiple divided internal reinforcement sheets are welded to the inside of the pipe to be reinforced. At the same time, the internal reinforcement sheets are spliced ​​into a ring inside the pipe to be reinforced, thereby increasing the connection area between the internal reinforcement pipe and the pipe to be reinforced, improving their bonding strength, and ensuring the reinforcement and strengthening effect of the pipe to be reinforced.

[0005] The object of the present invention is to provide a bushing type steel structure reinforcement method, which adopts the following scheme:

[0006] Cut the pipe to be reinforced to obtain a cover plate, form an operation port at the cutting position, and cut the inner reinforcement pipe to form multiple inner reinforcement sheets;

[0007] The inner reinforcement sheet is placed into the pipe to be reinforced through the operation port and welded to its edge;

[0008] Place all internal reinforcement sheets in sequence and weld them together to form a ring inside the pipe to be reinforced;

[0009] Install the cover plate to the operation port and weld it. Drill a hole through the circumferential wall of the pipe to be reinforced and extend it into the circumferential wall of the inner reinforcement pipe to form a blind hole, and then plug weld the drilled hole.

[0010] Furthermore, after the cover plate is installed to the operation port and welded, an external reinforcement pipe is installed outside the pipe to be reinforced and welded, and a hole is drilled through the external reinforcement pipe and the pipe to be reinforced and extends to the circumferential wall of the internal reinforcement pipe to form a blind hole.

[0011] Furthermore, the step of installing an external reinforcement pipe on the outer surface of the pipe to be reinforced and welding the pipe includes:

[0012] Cutting the external reinforcement tube to form a plurality of external reinforcement sheets;

[0013] The external reinforcement sheets are attached to the outer circumference of the pipe to be reinforced one by one and welded separately. The external reinforcement sheets are spliced ​​into a ring outside the pipe to be reinforced;

[0014] The outer reinforcement pipe, the pipe to be reinforced and the inner reinforcement pipe are connected together by drilling and plug welding.

[0015] Furthermore, the welding position of the outer reinforcement sheet and the welding position of the cover plate are staggered, and the axial length of the outer reinforcement pipe is greater than the length of the operation port.

[0016] Furthermore, when the end of the external reinforcement pipe contacts another pipe connected to the pipe to be reinforced, an intersecting linear groove is provided at the end of the external reinforcement pipe to fit the other pipe, and welding is performed along the edge of the groove.

[0017] Furthermore, the outer arc surface of the inner reinforcing sheet is in contact with the inner wall of the pipe to be reinforced, and the seam between one inner reinforcing sheet and another adjacent inner reinforcing sheet is welded.

[0018] Furthermore, the edge of the inner reinforcing sheet corresponding to the operation opening is flush with the edge of the operation opening, so that the weld of the inner reinforcing sheet overlaps and is connected with the weld of the operation opening.

[0019] Furthermore, the axial length of the operating port along the pipe to be reinforced is not less than the axial length of the inner reinforcement pipe, and a partial end surface of the inner reinforcement pipe is connected to the inner wall of the pipe to be reinforced.

[0020] Furthermore, the drill holes are distributed in a plurality of groups along the axial direction of the pipe to be reinforced, and each group of drill holes is distributed in a plurality of groups along the circumferential direction of the pipe to be reinforced.

[0021] Furthermore, each inner reinforcement sheet is provided with a drill hole and is connected to the pipe to be reinforced by plug welding.

[0022] Compared with the prior art, the present invention has the following advantages and positive effects:

[0023] (1) In order to solve the problem that steel structure pipe fittings are difficult to reinforce and repair, an operation port is opened on the pipe fitting to be reinforced, and multiple pieces of internal reinforcement sheets are welded to the inside of the pipe fitting to be reinforced. At the same time, the internal reinforcement sheets are spliced ​​into a ring inside the pipe fitting to be reinforced, thereby increasing the connection area between the internal reinforcement pipe and the pipe fitting to be reinforced, improving their bonding strength, and ensuring the reinforcement and strengthening effect of the pipe fitting to be reinforced.

[0024] (2) The method of opening an operating port and cutting the inner reinforcement pipe and placing it into the pipe to be reinforced can reduce the cutting size of the operating port, reduce the damage to the pipe to be reinforced during the reinforcement and strengthening process, and maintain the strength of the pipe to be reinforced. At the same time, the multiple inner reinforcement sheets formed after cutting are welded to the pipe to be reinforced, increasing the welding connection position and improving the connection strength.

[0025] (3) After the inner reinforcement sheet is inserted inside, the inner reinforcement sheet is re-welded into a ring to improve the strength of the inner reinforcement sheet body and the strength improvement effect of the inner reinforcement tube on the pipe to be reinforced; an outer reinforcement tube is set on the outer ring of the pipe to be reinforced, and the outer reinforcement tube is also attached and connected to the pipe to be reinforced by multiple outer reinforcement sheets, thereby increasing the welding area. The outer reinforcement tube after being spliced ​​into a ring can improve the strength of the pipe to be reinforced.

[0026] (4) The inner and outer reinforcing pipes can be connected to the pipes to be reinforced by edge welds, and their connection strength can be improved by plug welding after punching. Welding connections are performed at the edge and center of the outer reinforcing sheet to improve the joint stress performance of the inner and outer reinforcing pipes and the pipes to be reinforced, thereby improving the reinforcement and strengthening effects.

[0027] (5) The size of the inner reinforcing sheet near the operation port is set to match the size of the operation port, so that the welding position of the inner reinforcing sheet and the welding position of the cover plate are at the same circumferential position, and the connection between the weld of the inner reinforcing sheet in the inner circle and the weld of the edge of the outer circle cover plate is established to ensure the consistency of force and reduce the number of welds that need to be inserted into the operation port for operation, so that the inner reinforcing sheet near the operation port can be welded from outside the operation port, thereby improving the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0029] Figure 1 This is a structural schematic diagram of installing an inner reinforcement pipe on a pipe to be reinforced in an embodiment of the present invention.

[0030] Figure 2 This is a schematic end view of an inner reinforcement pipe installed in a pipe to be reinforced in an embodiment of the present invention.

[0031] Figure 3 This is a schematic diagram of installing an external reinforcement pipe on a pipe to be reinforced in an embodiment of the present invention.

[0032] Figure 4 This is a schematic end view of an external reinforcement pipe installed on a pipe fitting to be reinforced in an embodiment of the present invention.

[0033] In the figure: 1. Pipe fitting to be reinforced, 2. Internal reinforcement pipe, 3. Internal reinforcement plate, 4. External reinforcement pipe, 5. External reinforcement plate, 6. Cover plate, 7. Internal reinforcement plate at the operating port, 8. Operating port, 9. Drill hole. DETAILED DESCRIPTION

[0034] Example 1

[0035] In a typical embodiment of the present invention, Figure 1-Figure 4 As shown, a bushing type steel structure reinforcement method is given.

[0036] The rods of the grid steel structure are mostly hollow steel pipes. When they are damaged by natural or human factors, individual or local pipes are often damaged. In order to avoid the damaged location becoming a weak area of ​​the structure and inducing greater damage, the damaged location needs to be repaired and reinforced. However, due to the particularity of the grid steel structure, the damaged pipe is connected to other pipes by welding, and it is difficult to replace the entire pipe. The damaged pipe is mostly repaired and reinforced by in-situ reinforcement. The connection between the reinforcement and the pipe to be reinforced 1 of the traditional reinforcement method is difficult to meet the needs.

[0037] Based on this, this embodiment provides a bushing-type steel structure reinforcement method, which is particularly used in the repair and reinforcement of grid steel structures with complex pipe connections. Reinforcement pipes are arranged inside and outside the pipe 1 to be reinforced to form bushings, which not only meets the requirements of in-situ repair, but also improves the strength of the pipe 1 to be reinforced at the damaged position.

[0038] The bushing type steel structure reinforcement method is described in detail below with reference to the accompanying drawings.

[0039] See also Figure 1 The bushing-type steel structure reinforcement method opens an operating port 8 on the pipe 1 to be reinforced, welds the divided multiple internal reinforcement sheets 3 to the inside of the pipe 1 to be reinforced, and at the same time, the internal reinforcement sheets 3 are spliced ​​into a ring inside the pipe 1 to be reinforced, thereby increasing the connection area between the internal reinforcement pipe 2 and the pipe 1 to be reinforced, improving its bonding strength, and ensuring the reinforcement and strengthening effect of the pipe 1 to be reinforced.

[0040] Specifically, the bushing type steel structure reinforcement method includes:

[0041] Cut the pipe 1 to be reinforced to obtain a cover plate 6, and form an operation port 8 at the cutting position; cut the inner reinforcement pipe 2 to form a plurality of inner reinforcement sheets 3;

[0042] The inner reinforcing sheet 3 is placed into the pipe 1 to be reinforced through the operation port 8 and welded to its edge;

[0043] All the internal reinforcement sheets 3 are placed in sequence and welded, and the internal reinforcement sheets 3 are spliced ​​into a ring inside the pipe 1 to be reinforced;

[0044] Install the cover plate 6 to the operation port 8 and weld it. Drill a hole 9 through the circumferential wall of the pipe 1 to be reinforced and extend into the circumferential wall of the inner reinforcement pipe 2 to form a blind hole. Plug the drill hole 9 with welding.

[0045] like Figure 2 As shown, when the pipe 1 to be reinforced is cut to form the operating port 8, the operating port 8 can be set in a direction that is convenient for operation of the pipe 1 to be reinforced. In this embodiment, the operating port 8 is opened at the top of the horizontally arranged pipe 1 to be reinforced, so as to facilitate welding of the internal reinforcement plate 3 placed inside from the operating port 8 at the top.

[0046] It is understandable that when reinforcing the inclined pipe fitting, the operation port 8 can be opened on the side or top surface of the pipe fitting according to needs to facilitate operation.

[0047] In order to meet the operating space requirements when inserting the inner reinforcement sheet 3, the axial length of the operating port 8 along the pipe 1 to be reinforced shall not be less than the axial length of the inner reinforcement pipe 2. At the same time, the central angle corresponding to the operating port 8 in the circumferential direction also needs to be set. Considering the operating space during the insertion of the inner reinforcement sheet 3 and welding, the central angle corresponding to the operating port 8 shall not be less than 30 degrees; and in order to take into account the strength of the remaining part of the pipe 1 to be reinforced after cutting the operating port 8, the central angle corresponding to the operating port 8 shall not be greater than 120°.

[0048] like Figure 2 、 Figure 4 As shown, the central angle of the operation port 8 provided in this embodiment is 60°, taking into account both the operation space and the strength of the pipe 1 to be reinforced.

[0049] like Figure 2 As shown, the number of inner reinforcing pieces 3 formed by cutting the inner reinforcing tube 2 is configured according to demand. Each inner reinforcing tube 2 is divided into at least three inner reinforcing pieces 3 along the circumferential direction. The inner reinforcing pieces 3 can be arranged in equal sizes, or the arc length of the inner reinforcing pieces 3 along the circumferential direction can be configured according to the distribution position of the pipe 1 to be reinforced.

[0050] Optionally, taking the example of dividing the inner reinforcement pipe 2 into four inner reinforcement pieces 3, including three inner reinforcement pieces 3 with a central angle of 100° and one inner reinforcement piece 3 with a central angle of 60°, they can be spliced ​​into a ring inside the pipe 1 to be reinforced.

[0051] By opening an operating port 8 and cutting the inner reinforcing tube 2 and placing it into the pipe 1 to be reinforced, the cutting size of the operating port 8 can be reduced, the damage to the pipe 1 to be reinforced during the reinforcement and strengthening process can be reduced, and the strength of the pipe 1 to be reinforced can be maintained. At the same time, the multiple inner reinforcing sheets 3 formed after cutting are respectively welded to the pipe 1 to be reinforced, increasing the welding connection positions and improving the connection strength.

[0052] like Figure 2 and Figure 4 As shown, the outer diameter of the inner reinforcing tube 2 is equal to the inner diameter of the pipe 1 to be reinforced. After the inner reinforcing sheet 3 is cut, the outer arc surface of the inner reinforcing sheet 3 fits the inner wall of the pipe 1 to be reinforced, and the seam between one inner reinforcing sheet 3 and another adjacent inner reinforcing sheet 3 is welded.

[0053] Since welding the inner reinforcing sheet 3 requires operation inside the pipe 1 to be reinforced, after the inner reinforcing sheet 3 is formed into a loop, if the joint position of the inner reinforcing sheet 3 is located in the uncovered area of ​​the operation opening 8, the joint position is blocked and welding cannot be performed. Therefore, in this embodiment, the edge of the inner reinforcing sheet 7 at the operation opening is flush with the edge of the operation opening 8, so that the weld seam of the inner reinforcing sheet 3 overlaps and connects with the weld seam of the operation opening 8.

[0054] like Figure 2 As shown, after the pipe 1 to be reinforced is assembled, the three inner reinforcing pieces 3 with a central angle of 100° form a major arc with a central angle of 300°. In order to form a complete ring, the reserved 60° notch position corresponds to the operating opening 8 with a central angle of 60°, so that the inner reinforcing piece 7 at the operating opening is exactly at the position of the operating opening 8. Therefore, the entire ring weld of the inner reinforcing pipe 2 can be easily welded.

[0055] It should be pointed out that the size of the inner reinforcing sheet 3 near the operating port 8 is set to match the size of the operating port 8, so that the welding position of the inner reinforcing sheet 3 and the welding position of the cover plate 6 are in the same circumferential position, and a connection is established between the weld of the inner ring inner reinforcing sheet 3 and the edge weld of the outer ring cover plate 6, to ensure force consistency and reduce the number of welds that need to be inserted into the operating port 8 for operation, so that the inner reinforcing sheet 3 near the operating port 8 can be welded from outside the operating port 8, thereby improving operational convenience.

[0056] However, after the cover plate 6 is installed, the end of the inner reinforcing piece 7 at the operation port is blocked by the cover plate 6, so its end cannot be welded, and the partial end surface of the inner reinforcing pipe 2 is connected to the inner wall of the pipe 1 to be reinforced.

[0057] like Figure 3 As shown, after the cover plate 6 is installed to the operating port 8 and welded, an outer reinforcing pipe 4 is installed on the outer surface of the pipe 1 to be reinforced and welded. After the drill hole 9 passes through the outer reinforcing pipe 4 and the pipe 1 to be reinforced, it extends to the circumferential wall of the inner reinforcing pipe 2 to form a blind hole.

[0058] Installing an external reinforcement pipe 4 on the outer surface of the pipe 1 to be reinforced and welding the pipe 4 includes:

[0059] Cutting the external reinforcement tube 4 to form a plurality of external reinforcement sheets 5;

[0060] The outer reinforcing sheets 5 are attached to the outer circumferential surface of the pipe 1 to be reinforced one by one and welded respectively. The outer reinforcing sheets 5 are spliced ​​into a ring outside the pipe 1 to be reinforced;

[0061] The outer reinforcement pipe 4 , the pipe to be reinforced 1 and the inner reinforcement pipe 2 are connected together by plug welding through the drilled hole 9 .

[0062] It is understandable that the inner diameter of the outer reinforcing tube 4 is equal to the outer diameter of the pipe 1 to be reinforced, so that the inner arc surface of the outer reinforcing sheet 5 can fit on the outer wall of the pipe 1 to be reinforced.

[0063] Alternatively, if only the external reinforcing tube 4 is installed outside the pipe 1 to be reinforced, there is no need to provide an access opening 8 on the pipe 1 to be reinforced. Instead, multiple external reinforcing sheets 5 are attached to the outer circumference of the pipe 1 to be reinforced one by one and welded separately. The external reinforcing sheets 5 are then joined together to form a ring outside the pipe 1 to be reinforced. A bore 9 is drilled through the external reinforcing tube 4 and then extends into the circumferential wall of the pipe 1 to be reinforced, forming a blind hole. This blind hole is then plug-welded.

[0064] like Figure 4 As shown, the number of external reinforcing sheets 5 formed by cutting the external reinforcing tube 4 is configured according to demand. Each external reinforcing tube 4 is divided into at least three external reinforcing sheets 5 along the ring. The external reinforcing sheets 5 can be arranged in equal sizes, or the arc length of the external reinforcing sheets 5 along the ring can be configured according to the distribution position of the pipe 1 to be reinforced.

[0065] Optionally, taking the example of dividing the outer reinforcing pipe 4 into four outer reinforcing sheets 5 , including three outer reinforcing sheets 5 with a central angle of 100° and one outer reinforcing sheet 5 with a central angle of 60°, they can be spliced ​​into a ring inside the pipe 1 to be reinforced.

[0066] Among them, in order to improve the connection strength between the external reinforcement sheet 5 and the pipe 1 to be reinforced, the welding position of the external reinforcement sheet 5 and the welding position of the cover plate 6 can be staggered, and the axial length of the external reinforcement pipe 4 is greater than the length of the operating port 8, so that the end of the external reinforcement pipe 4 can also be staggered with the end of the cover plate 6.

[0067] Considering the arrangement of the inner reinforcing tube 2 and the outer reinforcing tube 4, after the inner reinforcing sheet 3 is placed inside, the inner reinforcing sheet 3 is re-welded into a ring, thereby improving the strength of the inner reinforcing sheet 3 body and improving the strength-enhancing effect of the inner reinforcing tube 2 on the pipe fitting to be reinforced 1; the outer reinforcing tube 4 is arranged on the outer ring of the pipe fitting to be reinforced 1, and the outer reinforcing tube 4 is also attached and connected to the pipe fitting to be reinforced 1 by means of multiple outer reinforcing sheets 5, thereby increasing the area of ​​the welding area. After being spliced ​​into a ring, the outer reinforcing tube 4 can improve the strength of the pipe fitting to be reinforced 1.

[0068] At the node position, when the end of the external reinforcement pipe 4 contacts another pipe connected to the pipe 1 to be reinforced, an intersecting linear groove is provided at the end of the external reinforcement pipe 4 to fit the other pipe, and welding is performed along the edge of the groove.

[0069] Combine Figure 1-Figure 4 There are multiple groups of drill holes 9 distributed axially along the pipe 1 to be reinforced, and each group of drill holes 9 is distributed circumferentially along the pipe 1 to be reinforced; each inner reinforcement sheet 3 is provided with a drill hole 9 and is connected to the pipe 1 to be reinforced by plug welding, so that the plug welding position covers each inner reinforcement sheet 3 and the outer reinforcement sheet 5.

[0070] The inner reinforcing tube 2 and the outer reinforcing tube 4 can be connected to the pipe 1 to be reinforced through the edge welds, and the connection strength can be improved by plug welding after punching. The welding connection is performed at the edge and center positions of the outer reinforcing sheet 5, thereby improving the performance of the inner reinforcing tube 2, the outer reinforcing tube 4 and the pipe 1 to be reinforced in bearing the same force, and improving the reinforcement and strengthening effect.

[0071] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A bushing type steel structure reinforcement method, characterized in that: include: Cut the pipe to be reinforced to obtain a cover plate, form an operation port at the cutting position, and cut the inner reinforcement pipe to form multiple inner reinforcement sheets; The inner reinforcement sheet is placed into the pipe to be reinforced through the operation port and welded to its edge; Place all internal reinforcement sheets in sequence and weld them together to form a ring inside the pipe to be reinforced; Install the cover plate to the operation port and weld it, drill a hole through the circumferential wall of the pipe to be reinforced and extend it into the circumferential wall of the inner reinforcement pipe to form a blind hole, and plug weld the drilled hole; An external reinforcement pipe is installed on the outer surface of the pipe to be reinforced and welded, including: cutting the external reinforcement pipe to form a plurality of external reinforcement sheets; The external reinforcement sheets are attached to the outer circumferential surface of the pipe to be reinforced one by one and welded separately. The external reinforcement sheets are spliced ​​into a ring outside the pipe to be reinforced; a hole is drilled through the external reinforcement pipe and the pipe to be reinforced and then extends to the circumferential wall of the internal reinforcement pipe to form a blind hole, and the external reinforcement pipe, the pipe to be reinforced and the inner reinforcement pipe are connected together by plug welding at the drilled hole.

2. The bushing type steel structure reinforcement method according to claim 1, characterized in that: The welding position of the outer reinforcement sheet and the welding position of the cover plate are staggered, and the axial length of the outer reinforcement pipe is greater than the length of the operation port.

3. The bushing type steel structure reinforcement method according to claim 2, characterized in that: When the end of the outer reinforcing pipe contacts another pipe connected to the pipe to be reinforced, an intersecting linear groove is provided at the end of the outer reinforcing pipe to fit the other pipe, and welding is performed along the edge of the groove.

4. The bushing type steel structure reinforcement method according to claim 1, characterized in that: The outer arc surface of the inner reinforcing sheet is in contact with the inner wall of the pipe to be reinforced, and the seam between one inner reinforcing sheet and another adjacent inner reinforcing sheet is welded.

5. The bushing type steel structure reinforcement method according to claim 1 or 4, characterized in that: The edge of the inner reinforcing sheet corresponding to the operation opening is flush with the edge of the operation opening, so that the weld of the inner reinforcing sheet overlaps and is connected with the weld of the operation opening.

6. The bushing type steel structure reinforcement method according to claim 5, characterized in that: The axial length of the operating port along the pipe to be reinforced is not less than the axial length of the inner reinforcement pipe, and a partial end surface of the inner reinforcement pipe is connected to the inner wall of the pipe to be reinforced.

7. The bushing type steel structure reinforcement method according to claim 1, characterized in that: The drill holes are distributed in a plurality of groups along the axial direction of the pipe to be reinforced, and each group of drill holes is distributed in a plurality of groups along the circumferential direction of the pipe to be reinforced.

8. The bushing type steel structure reinforcement method according to claim 1 or 7, characterized in that: Each inner reinforcement plate is provided with a drill hole and is connected to the pipe to be reinforced by plug welding.

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