Corner support material for rib bar earthquake-resistant reinforcement, and rib bar earthquake-resistant reinforcement device using the same

Abstract

To provide a corner support material for rib bar earthquake-resistance reinforcement, which enables construction in narrow areas where there are many existing obstacles, reduces the amount of obstacle removal / restoration work, and saves the cost and time of earthquake-resistance reinforcement work, when carrying out earthquake-resistance reinforcement work with rib bars in those areas, and a rib bar earthquake-resistance reinforcement device using the same. [Solution] An L-shaped corner support material 26 for earthquake-resistant reinforcement using rib bars is used, with one end of the L-shape being extended according to the length of the tip of the tightening tool (wrench head 22A of the torque wrench 22) and having unequal sides.

Description

[Technical Field]

[0001] This invention relates to a corner support material for rib bar earthquake reinforcement and a rib bar earthquake reinforcement device using the same, and in particular to a corner support material for rib bar earthquake reinforcement and a rib bar earthquake reinforcement device using the same that enable construction in narrow areas, reduce the amount of removal / restoration work for existing obstacles, and save costs and time in earthquake reinforcement construction. [Background technology]

[0002] In earthquake-resistant reinforcement work for viaduct columns, bridge piers, building columns, etc., in narrow areas with many obstacles, such as stores and warehouses, under elevated tracks, a rib bar (RB) earthquake-resistant reinforcement method is known (Patent Document 1). This method involves placing reinforcing steel members 12 around the periphery of a reinforced concrete (RC) column 10, for example, and fastening both ends of the column with locking nuts (hereinafter simply referred to as nuts) 18 embedded in corner supports 16 fixed to the corners of the column with adhesive 14, such as mortar, as shown in the perspective view (A) and horizontal cross section (B) of FIG. 1. This method provides shear and ductility reinforcement through simple construction. This RB earthquake-resistant reinforcement method is also possible in RC columns with exterior walls or partition walls 20, or in narrow construction environments where existing reinforcement methods are difficult to implement. Furthermore, construction is possible even in the presence of walls 20, as long as there are holes through which the reinforcing steel members 12 can pass. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3844323 Summary of the Invention [Problem to be solved by the invention]

[0004] To perform this RB method, as shown in Figure 2, the existing obstacle 8 must be a specified distance D away from the surface of the column 10, taking into consideration the installation clearance of the wrench head 22A at the tip of a tightening tool such as a torque wrench 22.

[0005] However, in the past, as shown in Figure 3, symmetrical, equal-sided corner supports 16 were used, with both sides of the L-shape having the same length L1, for example 162 mm, which required a gap of, for example, 250 mm or more as the distance D. If this distance D could not be secured, the existing obstacle 8 had to be removed and earthquake-resistant reinforcement work carried out on the pillar 10, and then, after the work was completed, the removed existing obstacle 8 had to be restored, which required cost and time for earthquake-resistant reinforcement work.

[0006] This invention was made to solve the above-mentioned conventional problems, and its objective is to enable construction in narrow areas, reduce the amount of removal / restoration work of existing obstacles, and save the cost and time of earthquake-resistant reinforcement work. [Means for solving the problem]

[0007] The present invention solves the above problem by providing an L-shaped rib bar corner support for earthquake-resistant reinforcement, characterized in that one side of the L-shape is extended according to the length of the tip of the tightening tool.

[0008] The present invention also solves the above problem by providing a rib bar earthquake reinforcement device, which is characterized by comprising a reinforcement material arranged to surround the outer periphery of the column to be earthquake-resistant reinforced, and a corner support material for the rib bar earthquake reinforcement that is fixed to the corner portion of the column. [Effects of the Invention]

[0009] This invention makes it possible to carry out construction work in narrow spaces, reducing the amount of work required to remove and restore obstacles, and saving time and money on earthquake-resistant reinforcement work. [Brief explanation of the drawings]

[0010] [Figure 1] (A) Perspective view and (B) Horizontal cross section showing an example of a column with conventional rib bar seismic reinforcement. [Figure 2]Horizontal cross section showing conventional rib bar seismic reinforcement in place [Figure 3] A plan view showing the shape of a conventional corner support [Figure 4] 1 is a front view showing the shape of the main part of an embodiment of a corner support according to the present invention; [Figure 5] (A) Plan view, (B) Front view, (C) Left side view, (D) Right side view, and (E) Bottom view showing the overall appearance [Figure 6] 5A, 5B, and 5C are a horizontal cross-sectional view taken along line AA in FIG. 5, a vertical cross-sectional view taken along line BB in FIG. 5, and a vertical cross-sectional view taken along line CC in FIG. 5, respectively, showing the cross-sectional shape. [Figure 7] A photo of the corner from above and outside. [Figure 8] A photo of the inside of the corner from above. [Figure 9] A photograph in lieu of a drawing showing the opening [Figure 10] A photograph in place of a drawing showing the configuration of an example of a torque wrench used in the embodiment. [Figure 11] FIG. 10 is a horizontal cross-sectional view showing the state in which rib bar seismic reinforcement is performed using the embodiment. [Figure 12] 1A and 1B are enlarged cross-sectional views of a front and a side, respectively, showing the state of a corner portion in the embodiment; [Figure 13] Flowchart showing the procedure for selecting construction methods for seismic reinforcement using rib bars [Figure 14] Flowchart showing the procedure for rib bar seismic reinforcement DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the contents described in the following embodiments. Furthermore, the components in the embodiments described below include those that can be easily imagined by a person skilled in the art, those that are substantially the same, and those that are within the so-called equivalent range. Furthermore, the components disclosed in the embodiments described below may be appropriately combined or appropriately selected for use.

[0012] 4 to 9, an embodiment of the corner support according to the present invention is a corner support 26 having an unequal L-shape with one side extended by a space A sufficient to accommodate the tip of a tightening tool, for example, a wrench head 22A including a socket 22B of a torque wrench 22. This allows the tip of the torque wrench 22 to fit within an opening 26A of the corner support 26, minimizing the amount of protrusion from the corner support 26.

[0013] The length of the L-shaped portion can be increased by, for example, 65 mm to L2=227 mm, which is the same length as the conventional L1=162 mm.

[0014] The thickness of the corner support member 26 can be, for example, 10 mm as in the conventional case, or 15 mm, which is an additional 5 mm.

[0015] 10 shows an example of the torque wrench 22. It includes a selectable socket 22B, an extension bar 22C, an adapter 22D, a ratchet handle 22E, and a manual torque wrench 22F.

[0016] 11 and 12 show the state in which the tip of the torque wrench 22 is inserted into the opening 26A of the corner support 26 and the nut 18 of the reinforcing steel material 12 is being tightened by the torque wrench 22. As a result of extending one of the L-shaped portions of the corner support 26, the wrench head 22A of the torque wrench 22 can be inserted between the column 10 and the existing obstacle 8, and the gap E between them can be reduced by the space of the wrench head 22A. This increases the likelihood that the existing obstacle 8 will not need to be removed.

[0017] Figure 13 shows the procedure for selecting the construction method when implementing rib bar seismic reinforcement.

[0018] First, in step 100, it is determined whether the distance between the existing obstacle 8 and the column 10 to be reinforced is a predetermined value D, for example, 250 mm or more. If the determination result is positive, the process proceeds to step 110, and the RB method is performed in step 140 using the conventional corner support material 16 shown in Figure 3.

[0019] On the other hand, if it is determined in step 120 that the distance is less than the predetermined value D and greater than or equal to the predetermined value E (for example, 250-65=185 mm), the process proceeds to step 130, and the RB construction method is carried out in step 140 using the corner support material 26 according to the present invention.

[0020] On the other hand, if it is determined in step 120 that the distance is less than the predetermined value E, the existing obstacle 8 is removed in step 150, the RB method is carried out in step 160, and then the existing obstacle 8 is restored in step 170, and the work is completed.

[0021] The procedure for performing seismic reinforcement using an embodiment of the present invention is shown in Figure 14. First, in step 200, the surface of the column 10 is cleaned. Next, in step 210, the corner support 26 according to the present invention is installed. Next, in step 220, the reinforcing steel 12 is tightened with the nuts 18 of the corner support 26 using, for example, a torque wrench 22. Next, in step 230, decorative panels are installed as needed.

[0022] The application of this invention is not limited to RC columns under viaducts, but can also be applied to other narrow spaces between columns and existing obstacles where the gap between the column and the existing obstacle is an issue. The size of the gaps D and E and the dimensions of the corner support 26 are not limited to those in the example, and the type of reinforcement is not limited to steel. The tightening tool is also not limited to the torque wrench shown in Figure 10. [Explanation of symbols]

[0023] 8... Existing obstacles 10...(reinforcement target) pillar 12...Reinforcing steel 14...Adhesive 16, 26...Corner support 18...Nut 20...Partition wall 22...Torque wrench (tightening tool) 22A...Wrench head 22B...Socket 26A…Support opening

Claims

1. An L-shaped rib bar corner support for earthquake-resistant reinforcement, An unequal-sided rib bar corner support for earthquake-resistant reinforcement, characterized in that one of the L-shaped sections is extended according to the length of the tip of the tightening tool.

2. a reinforcing material disposed so as to surround the outer periphery of the column to be seismically reinforced; The corner support member for earthquake-resistant reinforcement of the unequal sides rib bar according to claim 1, which is fixed to the corner portion of the column; A rib bar earthquake-resistant reinforcement device comprising:

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