Steel pipe column reinforcement structure and reinforcement method

Abstract

To improve a reinforcement effect while utilizing an existing steel pipe column structure, increase resistance to vibration and impact, improve efficiency and reliability of reinforcement work, and improve durability and safety.SOLUTION: Provided is a reinforcement method for an existing steel pipe column 1 including the following steps: an opening formation step for forming an opening 2b on the side of the steel pipe column 1; a fixing step for inserting a deformed reinforcing bar 6, which is a rod-shaped member, into the steel pipe column 1 through the opening 2b and fixing it to the inner wall surface of the steel pipe column 1, and filling a filler material 4 into the bottom of the steel pipe column 1 through the opening and embedding the lower end of the deformed reinforcing bar 6 in the filler material 4; a solidification step for injecting resin mortar 5, which is a solidification agent, from the top surface of the filler material 4 to the opening height position of the opening 2b; and a closing step for closing the opening 2b. In the fixing step, the deformed reinforcing bar 6 is fixed to the inner wall surface of a steel pipe column main body 2 with an adhesive.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a reinforcing structure and a reinforcing method for steel pipe poles such as supporting structures for buildings and bridges, and structural materials for lighting poles and advertising signs. [Background technology]

[0002] Traditionally, steel pipe columns have been reinforced by forming a composite structure in which concrete is filled inside the steel pipe, and by combining the compressive strength of the concrete with the tensile strength of the steel pipe, it is possible to reduce the decrease in strength even in the event of excessive deformation due to earthquakes, etc., and provide high earthquake resistance. Other methods include the FRP sheet method, in which fiber-reinforced plastic (FRP) sheets are attached to damaged steel pipe columns to reinforce them, and the SCFR method, in which SCFR sheets made from carbon fiber are attached to corroded areas with a special adhesive and then finished with a paint finish.

[0003] Furthermore, as a construction method for increasing strength, a technology has been proposed in which multiple rod-shaped members are inserted into the hollow portion from the upper end opening of a steel pipe column, and the multiple rod-shaped members are placed inside the hollow portion as reinforcing materials, and gap filling material is injected into the hollow portion from the end opening to fill the gap between the inner surface of the hollow portion and the rod-shaped members (see Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-283392 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the technology described in the above-mentioned Patent Document 1 requires the formation of an upper end opening of a steel pipe pole, which means that the upper end opening of an existing steel pipe pole must be cut off, which may affect the structural strength of the steel pipe pole and reduce the overall stability and durability.

[0006] Furthermore, in the technology described in Patent Document 1, the rod-shaped members are not directly fixed to the steel pipe column, which may result in insufficient interaction between the reinforcing material and the steel pipe column, reducing the reinforcing effect. Unfixed rod-shaped members have low resistance to vibration and impact, which raises concerns about durability and safety, particularly in environments with frequent vibrations or impacts.

[0007] Therefore, the present invention solves the above-mentioned problems, and aims to provide a construction method and structure that can improve the reinforcement effect, increase resistance to vibration and impact, increase the efficiency and reliability of reinforcement work, and improve durability and safety while utilizing the structure of existing steel pipe columns. [Means for solving the problem]

[0008] In order to solve the above problems, the reinforcement method of the present invention is a reinforcement method for an existing steel pipe column, an opening forming step of forming an opening in a side portion of the steel pipe column; a fixing process in which a rod-shaped member is inserted into the steel pipe column through the opening and fixed to an inner wall surface of the steel pipe column, and a filler material is filled into the bottom of the steel pipe column through the opening, and a lower end portion of the rod-shaped member is embedded in the filler material; a solidification step of injecting a solidification agent from the upper surface of the filling material to the opening height position of the opening; a closing step of closing the opening; The present invention is characterized by comprising: The reinforced structure of a steel pipe pole of the present invention is characterized in that it is reinforced by the above-mentioned reinforcing method.

[0009] In the above invention, in the opening forming step, the opening is formed by removing a lid body that is previously provided on the steel pipe column, In the closing step, the lid is returned to its original position to close the opening. It is preferable.

[0010] In the above invention, in the fixing step, it is preferable that the rod-shaped member is a deformed steel bar, and that this deformed steel bar is fixed to the inner wall surface of the steel pipe column with an adhesive.

[0011] In the above invention, the filler in the fixing step is mortar or concrete, In the solidification step, the solidification agent is resin mortar. It is preferable.

[0012] In the above invention, in the fixing step, when wiring is already installed inside the steel pipe pole, a tubular member that protects the wiring is embedded in the filler material, In the solidification step, the cylindrical member is embedded in the solidification agent while the upper end of the tubular member is protruding above the solidification agent. It is preferable. [Effects of the Invention]

[0013] According to the present invention, the durability and safety of steel pipe poles against external forces such as earthquakes and strong winds can be significantly improved. That is, the rod-shaped members added to the interior of the steel pipe pole body reinforce the internal structure, increasing the overall rigidity and strength of the steel pipe pole, so that the steel pipe pole 1 exhibits stronger resistance to external forces and can maintain structural stability.

[0014] In addition, the use of fillers and hardeners to harden them improves stress distribution within the steel pipe column body, enhancing earthquake resistance. Furthermore, water and chemical resistance are also provided. This protects the steel pipe column from damage caused by environmental factors and ensures long-term durability.

[0015] Furthermore, the design of the opening and cover ensures ease of maintenance, allowing for quick repairs and replacement of parts as needed, which is an important factor in maintaining the functionality and efficiency of the steel pipe pole. As a result, the present invention avoids measures that would weaken the steel pipe pole itself, such as cutting off the top end cap. This approach allows the reinforced steel pipe pole to maintain the strength of the original structure while improving its seismic resistance and durability through additional reinforcement. The steel pipe pole is more resistant to vibration and impact, making it a safer and more effective structure. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a front view showing the appearance of a steel pipe pole according to an embodiment. [Figure 2] FIG. 2 is a perspective view showing an opening portion (closed state) of the steel pipe pole according to the embodiment. [Figure 3] FIG. 2 is a perspective view showing an opening portion (open state) of the steel pipe pole according to the embodiment. [Figure 4] 1A and 1B are perspective views showing the fixing process (filling aggregate) in the reinforcing method for a steel pipe column according to an embodiment, where FIG. 1A shows the case where a tubular member is not installed, and FIG. 1B shows the case where a tubular member is installed. [Figure 5] 1A and 1B are perspective views showing the fixing process (fixing deformed steel bars) in the reinforcing method for a steel pipe column according to an embodiment, where (a) shows the case where a tubular member is not installed, and (b) shows the case where a tubular member is installed. [Figure 6] 1A and 1B are perspective views showing the solidification process (injecting resin mortar) in the method for reinforcing a steel pipe column according to an embodiment, where (a) shows the case where a tubular member is not installed, and (b) shows the case where a tubular member is installed. [Figure 7] 1A and 1B are cross-sectional views showing a reinforcement structure for a steel pipe pole according to an embodiment, in which FIG. 1A shows a case where a tubular member is not installed, and FIG. 1B shows a case where a tubular member is installed. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the embodiments shown below are merely examples of devices and the like that embody the technical concept of the present invention, and the technical concept of the present invention does not limit the materials, shapes, structures, arrangements, etc. of each component to those described below. Various modifications can be made to the technical concept of the present invention within the scope of the claims.

[0018] (Structure of steel pipe column) FIG. 1 shows the appearance of a steel pipe pole 1 according to this embodiment. As shown in the figure, the steel pipe pole 1 is roughly composed of a steel pipe pole body 2, a clock unit 10, and a concrete foundation 3. The clock unit 10 is a circular device incorporating a clock mechanism with a display surface, and is attached to the top of the steel pipe pole body 2. This attachment part is designed to safely support the clock and to facilitate maintenance and replacement as needed. The steel pipe pole body 2 is formed from steel into a hollow cylindrical shape, and has sufficient strength and rigidity to support the clock unit 10.

[0019] A maintenance opening 2b is formed on the side of the steel pipe pole body 2, and is normally closed by a cover 2a. Power supply cables and the like are wired inside this opening 2b. The lower part of this steel pipe pole body 2 is fixed to a concrete foundation 3 using anchor bolts and other mounting devices. This concrete foundation 3 is buried in the ground G.

[0020] (Method of reinforcing steel pipe columns) A method for reinforcing the steel pipe pole 1 described above will be described. Figures 2 to 6 show the procedure of the reinforcing method according to this embodiment. Note that the processing procedure described below is merely an example, and each step may be modified as much as possible. Furthermore, in the processing procedure described below, steps may be omitted, replaced, or added as appropriate depending on the embodiment.

[0021] First, the opening formation process is started. In the opening formation process, as shown in Figures 2 and 3, a lid 2a provided in advance on the side surface of the steel pipe pole body 2 is removed to form an opening 2b for maintenance. This opening 2b enables access to the inside of the steel pipe pole body 2.

[0022] Next, as shown in FIG. 4, filler 4 containing aggregate is poured through opening 2b and filled into the bottom of steel pipe column body 2. Furthermore, as shown in FIG. 5, filler containing aggregate 51 is poured into the bottom of steel pipe column 1 through opening 2b, and the lower end portions of deformed reinforcing bars 6 are embedded in it. The filler 4 containing aggregate and the aggregate 51 fix the deformed reinforcing bars 6 as reinforcing materials, improving the earthquake resistance and durability of steel pipe column 1. At this time, the deformed reinforcing bars 6 are inserted into steel pipe column body 2 through opening 2b and fixed to the inner wall surface of steel pipe column body 2 using adhesive, welding, or mechanical fasteners. The deformed reinforcing bars 6 are used to increase the rigidity and strength of steel pipe column 1, and the use of deformed reinforcing bars in particular enhances the reinforcing effect.

[0023] Next, a solidification process is carried out. As shown in Figure 6, aggregate 51 is filled from the top surface of the filler 4 up to the height of the opening 2b, and then a hardening agent 5 such as resin mortar is injected to integrate the filler 4, the aggregate 51, and the deformed steel bars 6, thereby further strengthening the internal structure of the steel pipe column 1. The hardening agent 51 such as resin mortar fills the gaps between the solidified fillers 4 and 51, providing water resistance and chemical resistance.

[0024] If there is existing wiring inside the steel pipe column 1, as shown in (b) of each of Figures 4 to 6, in order to protect the wiring, a tubular member 7 such as a polyvinyl chloride, resin, or metal pipe is embedded in the filler containing the filler 4 and aggregate 51, the bottom and top of the filler are connected, and the wiring is inserted through this. Even in this case, when the hardener 51 such as resin is injected after the deformed steel bars 6 are fixed, the upper end of the tubular member 7 is made to protrude above the hardener 51, and by embedding the tubular member 7 in the hardener 51 as shown in (b) of Figure 7, it is possible to prevent the wiring 31 from being integrated with the filler by the hardener.

[0025] Finally, a closing process is carried out. In this process, after the reinforcement work is completed, the opening 2b is closed with the lid 2a, restoring it to its original state. The lid 2a is made of a material with excellent weather resistance and waterproofing, and plays an important role in protecting the steel pipe column body 2 and maintaining its aesthetic appearance.

[0026] (Reinforced steel pipe column structure) The configuration of the steel pipe pole 1 reinforced by the above-described reinforcing method will be described below. Fig. 7 shows a cross section of the steel pipe pole 1 after reinforcement according to this embodiment. As shown in Figures 1(a) and 1(b), the reinforced steel pipe pole 1 has as its base a steel pipe pole body 2 formed of a hollow cylindrical body, and various equipment such as a clock unit 10, electric lights, notice boards, signs, wind power generation equipment, etc. attached to the upper part of the steel pipe pole body 2. The lower part of the steel pipe pole body 2 is also fixed to a concrete foundation 3 using anchor bolts and other mounting devices, and this concrete foundation 3 is buried in the ground G and supports the entire steel pipe pole 1.

[0027] A maintenance opening 2b is formed on the side of this steel pipe column body 2, and is normally closed by a lid 2a. Note that, as shown in Fig. 1(b), for example, existing wiring 31, such as a power supply cable, may be pulled into this opening 2b from the outside. In this case, in order to protect the wiring 31, a tubular member 7 is buried in a filler material containing a filler material 4 and aggregate 51, and the bottom and top surfaces of the filler material are connected, through which the wiring 31 is inserted.

[0028] Then, inside the reinforced steel pipe column body 2, a deformed reinforcing bar 6, which is a rod-shaped member, is placed through the opening 2b and fixed to the inner wall surface of the steel pipe column body 2. This deformed reinforcing bar 6 is firmly fixed to the inner wall surface of the steel pipe column body 2 by adhesive, welding or other mechanical fixing means, and its lower end reaches the concrete foundation 3, and is also fixed to the concrete foundation 3 by adhesive, welding or other mechanical fixing means.

[0029] The interior of the steel pipe column body 2 reinforced with the deformed reinforcing bars 6 in this way is filled with filler 4 from its bottom surface to a predetermined depth position, and a filler containing aggregate 51 solidified with resin mortar 5, which is a hardening agent, is filled from the top surface of the filler 4 to the bottom of the opening 2b. The lower ends of the deformed reinforcing bars 6 are embedded in the filler 4 containing aggregate, which is filled from the bottom of the steel pipe column body 2 to the lower end of the opening 2b, and in the filler containing resin mortar 5 containing aggregate 51, thereby fixing the deformed reinforcing bars 6 as reinforcement, and transmitting the stress acting on the inner peripheral surface of the steel pipe column body 2 to the concrete foundation 3 via the resin mortar 5 and filler 4 due to the compressive strength or tensile strength of the deformed reinforcing bars 6.

[0030] (Actions and Effects) As explained above, according to the method for reinforcing a steel pipe pole in this embodiment, it is possible to significantly improve the durability and safety of the steel pipe pole 1 against external forces such as earthquakes and strong winds. That is, the deformed steel bars 6 added to the inside of the steel pipe pole body 2 reinforce the internal structure, increasing the overall rigidity and strength of the steel pipe pole 1, and the steel pipe pole 1 can exhibit stronger resistance to external forces and maintain structural stability.

[0031] In addition, the use of the filler 4 and aggregate 51 filled inside and the resin mortar 5 that hardens them improves the stress distribution inside the steel pipe column body 2, enhancing earthquake resistance. Furthermore, water resistance and chemical resistance are also provided. This protects the steel pipe column from damage caused by environmental factors and ensures long-term durability.

[0032] Furthermore, the design of the opening 2b and the cover 2a ensures ease of maintenance, allowing for quick repairs and part replacement as needed. This is an important factor in maintaining the functionality and efficiency of the steel pipe pole. Furthermore, in this embodiment, the pre-formed opening 2b allows reinforcement while maintaining the existing structure of the steel pipe pole 1, thereby avoiding measures that would reduce the strength of the steel pipe pole itself, such as cutting off the upper end cap. This approach allows the reinforced steel pipe pole to maintain the strength of its original structure while improving its seismic resistance and durability through additional reinforcement. The steel pipe pole 1 is therefore more resistant to vibration and impact, making it a safer and more effective structure.

[0033] The present invention is not limited to the above-described embodiments, and the components can be modified and embodied in practice without departing from the spirit of the invention. Furthermore, various inventions can be created by appropriately combining the components disclosed in the above-described embodiments. For example, some components may be omitted from all the components shown in the embodiments. [Explanation of symbols]

[0034] G...ground 1…Steel pipe column 2…Steel pipe column body 2a…Lid body 2b…Opening 3...Concrete foundation 4…Filling material 5...Resin mortar 6...Deformed steel bars 7...Tubular member 10...Clock section 31...Wiring 51...Aggregate

Claims

1. A reinforcement method for existing steel pipe columns, an opening forming step of forming an opening in a side portion of the steel pipe column; a fixing process in which a rod-shaped member is inserted into the steel pipe column through the opening and fixed to an inner wall surface of the steel pipe column, and a filler material is filled into the bottom of the steel pipe column through the opening, and a lower end portion of the rod-shaped member is embedded in the filler material; a solidification step of injecting a solidification agent from the upper surface of the filling material to the opening height position of the opening; a closing step of closing the opening; A reinforcement method for a steel pipe column, comprising:

2. In the opening forming step, the opening is formed by removing a lid body that is previously provided on the steel pipe column, In the closing step, the lid is returned to its original position to close the opening. The method for reinforcing a steel pipe column according to claim 1.

3. 2. The method for reinforcing a steel pipe column according to claim 1, wherein in the fixing step, the rod-shaped member is a deformed steel bar, and the deformed steel bar is fixed to the inner wall surface of the steel pipe column with an adhesive.

4. In the fixing step, the filler is mortar or concrete, In the solidification step, the solidification agent is resin mortar. The method for reinforcing a steel pipe pole according to claim 1,

5. In the fixing step, when wiring is already installed inside the steel pipe pole, a tubular member that protects the wiring is embedded in the filler material, In the solidification step, the cylindrical member is embedded in the solidification agent while the upper end of the tubular member is protruding above the solidification agent. The method for reinforcing a steel pipe column according to claim 1.

6. A reinforced structure for a steel pipe pole, characterized in that it is reinforced by the method for reinforcing a steel pipe pole according to any one of claims 1 to 5.

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