Space grid structure compression steel pipe reinforcing structure

Abstract

The utility model belongs to the technical field of steel pipe reinforcement, and discloses a space grid structure compression steel pipe reinforcement structure which is provided with an outer sleeve steel pipe, a steel wire mesh is arranged on the inner wall of the outer sleeve steel pipe, the inner wall of the outer sleeve steel pipe is connected with the steel wire mesh through spot welding points, and a section intermittent welding seam is arranged between the outer sleeve steel pipe and a compression steel pipe. The outer sleeve steel pipe comprises an upper half subdivision outer sleeve steel pipe and a lower half subdivision outer sleeve steel pipe. Heat generated by on-site construction welding operation is blocked by an air layer between the outer sleeve steel pipe and the pressed steel pipe to be reinforced, so that the influence on internal force and deformation of the structure is very small; the outer sleeve steel pipe can be better fastened on the pressed steel pipe to be reinforced due to contraction deformation generated by welding of the half-and-half subdivision outer sleeve steel pipe; and after the compression steel pipe is reinforced, the diameter is increased, and the appearance is basically unchanged after the corrosion-resistant and fire-retardant coating is brushed, so that the device is high in practicability and suitable for popularization and application.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel pipe reinforcement, and in particular relates to a space grid structure compressed steel pipe reinforcement structure. Background Art

[0002] At present, in-service spatial grid structures are often under load during reinforcement. Direct welding work on the rods causes the rods to be affected by high temperature and produce additional internal forces and deformation, thereby changing the internal force distribution of the rods and endangering the safety of the structure. The deformation of the rods is difficult to recover. Therefore, when reinforcing and renovating such structures, the design and construction plans should avoid using the process of direct welding work on the rods on site as much as possible.

[0003] The current "Steel Structure Reinforcement Design Standard" (GB 51367-2019) stipulates that the construction method for outsourced steel pipes is direct welding, which has a large thermal impact on the reinforced components or rods and is not suitable for the reinforcement of load-bearing structures.

[0004] The present invention is a method for solving the problem of reducing the influence of welding heat of the half-split outer steel pipe on the reinforcement rod, and the appearance of the reinforced pressure steel pipe is not affected. In addition, the method can save materials for steel pipes that need to significantly improve the pressure stability, and the outer steel pipe can be better fastened to the reinforced pressure steel pipe due to cooling and shrinkage after welding.

[0005] Through the above analysis, the problems and defects of the prior art are as follows:

[0006] In the prior art, spatial grid structures are often under load when they are reinforced. Welding operations are performed directly on the rods, causing the rods to be affected by high temperatures and generate additional internal forces and deformations, thereby changing the internal force distribution of the rods, endangering the safety of the structure, and the deformation of the rods is difficult to recover. Utility Model Content

[0007] In view of the problems existing in the prior art, the utility model provides a space grid structure compressed steel pipe reinforcement structure.

[0008] The utility model is implemented as follows: a space grid structure compressive steel pipe reinforcement structure is provided with an outer jacket steel pipe, a steel wire mesh is provided on the inner wall of the outer jacket steel pipe, the inner wall of the outer jacket steel pipe and the steel wire mesh are connected by spot welding points, a cross-sectional intermittent weld is provided between the outer jacket steel pipe and the compressive steel pipe, and the outer jacket steel pipe includes an upper half-split outer jacket steel pipe and a lower half-split outer jacket steel pipe.

[0009] Furthermore, the steel wire mesh is arranged on the inner wall of the outer sleeve steel pipe and is fixed by spot welding.

[0010] Furthermore, the upper half-split outer casing steel pipe and the lower half-split outer casing steel pipe of the outer casing steel pipe are fixed to the pressure-bearing steel pipe by using section intermittent welds, and a steel wire mesh is provided as a spacer between the outer casing steel pipe and the pressure-bearing steel pipe.

[0011] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the utility model are as follows:

[0012] First, in the present invention, the heat generated by the on-site construction welding operation is blocked by the air layer between the outer jacket steel pipe and the pressure steel pipe to be reinforced, and has little effect on the internal force and deformation of the structure; the shrinkage deformation of the half-split outer steel pipe due to welding can make the outer jacket steel pipe better fastened to the pressure steel pipe to be reinforced; after the pressure steel pipe is reinforced, only the diameter becomes larger, and after the anti-corrosion and fire-retardant coatings are applied, the appearance remains basically unchanged.

[0013] In the utility model, the heat generated by the on-site construction welding operation is isolated by the air layer between the outer jacket steel pipe and the pressure steel pipe to be reinforced, and has little effect on the internal force and deformation of the structure; the shrinkage deformation of the outer jacket steel pipe split in half due to welding can make the outer jacket steel pipe better fastened to the pressure steel pipe to be reinforced; after the pressure steel pipe is reinforced, only the diameter becomes larger, and after the anti-corrosion and fire-retardant paint is applied, the appearance remains basically unchanged.

[0014] Second, the technical solution of the utility model fills the technical gap in the industry at home and abroad: in the utility model, the heat generated by the on-site construction welding operation is blocked by the air layer between the outer jacket steel pipe and the pressure steel pipe to be reinforced, and has little effect on the internal force and deformation of the structure; the shrinkage deformation of the half-split outer steel pipe due to welding can make the outer jacket steel pipe better fastened to the pressure steel pipe to be reinforced; after the pressure steel pipe is reinforced, only the diameter becomes larger, and after applying anti-corrosion and fire-retardant paint, the appearance remains basically unchanged.

[0015] Third, the space grid structure compression steel pipe reinforcement technology provided by the utility model has achieved significant technical progress by introducing the design of outer jacket steel pipe and wire mesh. It is specifically manifested in the following aspects:

[0016] 1) Enhanced structural stability: The design of the outer jacket steel pipe effectively enhances the structural stability of the pressure steel pipe. The use of the upper and lower split outer jacket steel pipes and the section intermittent weld connection between them and the pressure steel pipe ensures the stability and bearing capacity of the overall structure.

[0017] 2) Improve the compressive strength: The setting of the wire mesh on the inner wall of the steel pipe further enhances the compressive strength of the structure. The wire mesh is connected to the inner wall of the steel pipe by spot welding, which effectively disperses the pressure on the compressed steel pipe and reduces the risk of local stress concentration.

[0018] 3) Easy to install and maintain: The outer jacket steel pipe adopts a split design, which is convenient for installation on the pressure steel pipe during installation, and also convenient for later maintenance and replacement. This design reduces the difficulty of construction and improves work efficiency.

[0019] 4) Extend service life: Through the reinforcement of the outer jacket steel pipe and wire mesh, the deformation and wear rate of the compressed steel pipe are effectively slowed down, thereby extending the service life of the overall structure.

[0020] 5) Optimize cost-effectiveness: This technical solution not only improves structural performance, but also focuses on optimizing cost-effectiveness. Through reasonable material selection and construction process design, a balance between performance improvement and cost control is achieved.

[0021] In summary, the spatial grid structure compressive steel pipe reinforcement technology has made significant technical progress in enhancing structural stability, improving compressive resistance, facilitating installation and maintenance, extending service life, and optimizing cost-effectiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of a spot-welded steel wire mesh of a space grid structure pressure steel pipe reinforcement structure provided by an embodiment of the utility model;

[0023] Figure 2 It is a structural diagram of intermittent welds of the outer jacket steel pipe and the pressure steel pipe of the space grid structure pressure steel pipe reinforcement structure provided by the embodiment of the utility model;

[0024] Figure 3 It is a connection structure diagram of the upper half-split outer jacket steel pipe, the lower half-split outer jacket steel pipe and the pressure steel pipe in the steel pipe for reinforcing the pressure steel pipe of the space grid structure provided by the embodiment of the utility model;

[0025] In the figure: 1. outer jacket steel pipe; 11. upper half-split outer jacket steel pipe; 12. lower half-split outer jacket steel pipe; 2. inner wall of outer jacket steel pipe; 3. steel wire mesh; 4. spot welding point; 5. pressure steel pipe; 6. cross-section intermittent weld. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0027] Based on the description of the space grid structure compressed steel pipe reinforcement structure of the present invention, these embodiments will explain in detail how to apply and assemble the reinforcement system.

[0028] Example 1: Bridge structure reinforcement

[0029] 1) Background and application scenarios:

[0030] In bridge structures, it is often necessary to reinforce heavy-loaded steel pipes, especially in the main supporting parts of the bridge. The steel pipes in these parts are fatigued or damaged due to long-term heavy pressure.

[0031] 2) Reinforcement process:

[0032] First, select the outer jacket steel pipes that are suitable for the size of the bridge support part. These outer jacket steel pipes are divided into upper and lower parts.

[0033] A steel mesh is installed on the inner wall of the outer jacket steel pipe and fixed to the inner wall by spot welding.

[0034] Slip these treated jacketed steel pipes over the compression steel pipes of the bridge, making sure the wire mesh is located between the two steel pipes.

[0035] The upper and lower halves of the outer jacket steel pipe are fixed to the pressure steel pipe by means of intermittent cross-section welds.

[0036] Example 2: Strengthening of pillars of high-rise buildings

[0037] 1) Background and application scenarios:

[0038] In high-rise buildings, pillars are key structures that bear the weight of the floors. As buildings age, these pillars become worn or damaged and need to be reinforced.

[0039] 2) Reinforcement process:

[0040] According to the size of the pillar, the appropriate outer jacket steel pipe is customized. These steel pipes are also divided into upper and lower halves.

[0041] A steel wire mesh is installed on the inner wall of each outer jacket steel pipe, and the steel wire mesh is firmly fixed to the inner wall of the steel pipe by spot welding technology.

[0042] Put the treated jacketed steel pipe on the compression support of the building, making sure the wire mesh is between the two steel pipes.

[0043] The two halves of the outer jacket steel pipe are firmly welded to the compression steel pipe of the support using the intermittent section weld method.

[0044] In both embodiments, the use of wire mesh increases the overall stability and load-bearing capacity of the compression steel pipe, while the design of the outer jacket steel pipe provides additional support and protection. In this way, the stability and durability of the existing structure can be effectively enhanced, especially for structural components that bear heavy loads for a long time.

[0045] like Figure 1-3As shown, a spatial grid structure compressive steel pipe reinforcement structure is provided with an outer jacket steel pipe 1, a steel mesh 3 is provided on the inner wall 2 of the outer jacket steel pipe, the inner wall 2 of the outer jacket steel pipe and the steel mesh 3 are connected by spot welding points 4, and a cross-sectional intermittent weld 6 is provided between the outer jacket steel pipe 1 and the compressive steel pipe 5, and the outer jacket steel pipe 1 includes an upper half-split outer jacket steel pipe 11 and a lower half-split outer jacket steel pipe 12.

[0046] The steel mesh 3 is arranged on the inner wall 2 of the outer jacket steel pipe and fixed by spot welding.

[0047] The upper half-split outer shell steel tube 11 and the lower half-split outer shell steel tube 12 of the outer shell steel tube 1 are fixed to the pressure steel tube 5 by using the cross-sectional intermittent welds 6, and a steel wire mesh 3 is provided between the outer shell steel tube 1 and the pressure steel tube 5 as a spacer.

[0048] Working principle: a whole pipe is split in half, and a steel mesh 3 is spot welded along the inner side, and then it is jacketed on the to-be-reinforced compressive steel pipe 5, and finally intermittent butt welding 6 is performed at the gap of the jacket steel pipe 1 to combine the upper half-split jacket steel pipe 11 and the lower half-split jacket steel pipe 12, and the weld is cooled and contracted to fasten them to the to-be-reinforced compressive steel pipe 5. During the welding process, due to the presence of the inner steel mesh 3, there is a certain space between the weld and the surface of the to-be-reinforced compressive steel pipe for heat dissipation, which reduces the influence of welding heat, and the appearance of the reinforced compressive steel pipe remains basically unchanged.

[0049] The specific implementation example of the utility model is as follows: the whole steel pipe is split into two halves, and a steel mesh is spot welded along the inner side, and the surface of the pressure steel pipe to be reinforced should be polished and flattened to ensure that the two are tightly fitted; the half-split outer jacket steel pipe is installed on both sides of the pressure steel pipe to be reinforced, and the gap between the two is adjusted to be located in the vertical plane, and then temporary fixing measures are taken (such as tying with nylon rope or steel wire) to prevent the half-split outer jacket steel pipe from slipping or falling; intermittent welding is used at the gap between the upper half-split outer jacket steel pipe and the lower half-split outer jacket steel pipe to combine them into one.

[0050] The application embodiment of the utility model provides a space grid structure compressed steel pipe reinforcement structure, which is provided with an outer jacket steel pipe, and a steel wire mesh is provided on the inner wall of the outer jacket steel pipe, the inner wall of the outer jacket steel pipe and the steel wire mesh are connected by spot welding points, and a cross-section intermittent weld is provided between the outer jacket steel pipe and the compressed steel pipe, and the outer jacket steel pipe includes an upper half-split outer jacket steel pipe and a lower half-split outer jacket steel pipe. In the utility model, the heat generated by the on-site construction welding operation has little effect on the internal force and deformation of the structure due to the air layer barrier between the outer jacket steel pipe and the compressed steel pipe to be reinforced; the shrinkage deformation caused by welding of the half-split outer steel pipe can better fasten the outer jacket steel pipe to the compressed steel pipe to be reinforced; after the compressed steel pipe is reinforced, only the diameter becomes larger, and after the anti-corrosion and fire-retardant coatings are applied, the appearance remains basically unchanged, and it is highly practical and suitable for popularization.

[0051] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0052] The above description is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention shall be covered by the protection scope of the present invention.

Claims

1. A space grid structure compressed steel pipe reinforcement structure, characterized in that: An outer jacket steel pipe is provided, and a steel wire mesh is provided on the inner wall of the outer jacket steel pipe. The inner wall of the outer jacket steel pipe and the steel wire mesh are connected by spot welding points. A cross-sectional intermittent weld is provided between the outer jacket steel pipe and the pressure steel pipe. The outer jacket steel pipe includes an upper half-split outer jacket steel pipe and a lower half-split outer jacket steel pipe.

2. The space grid structure pressure steel pipe reinforcement structure according to claim 1 is characterized in that: The steel wire mesh is arranged on the inner wall of the outer sleeve steel pipe and is fixed by spot welding.

3. The space grid structure compressed steel pipe reinforcement structure according to claim 1 is characterized in that: The upper half-split outer casing steel pipe and the lower half-split outer casing steel pipe of the outer casing steel pipe are fixed on the pressure-bearing steel pipe by using section intermittent welds, and a steel wire mesh is provided as a spacer between the outer casing steel pipe and the pressure-bearing steel pipe.

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