Steel frame repair structure, and steel frame repair method

Abstract

To provide a steel frame repair structure capable of easily repairing a steel frame at low cost without removing the existing screen member, and a steel frame repair method.SOLUTION: The steel frame repair structure is a steel frame repair structure that has H-shaped steel pillars erected and horizontal frames bridged between the supports. The repair structure includes: an upper frame and a lower frame; a panel frame with a pair of vertical frames on the left and right; an anti-slip bracket that is attached to the horizontal frame, which is attached to the upper frame of the panel; and a panel mounting bracket that is attached to the vertical frames of the panel frame and has a clamping part that clamps the flange of the support.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a repair structure for a steel frame and a repair method for a steel frame. [Background technology]

[0002] Conventionally, steel frames, which are steel frameworks filled with filler materials such as stone, have been known for use as dams, retaining walls, or revetments. A steel frame is formed by pillars (supports), horizontal members (horizontal frames), and connecting members (connecting frames), and a screen material is provided on the outer surface, such as the front side (downstream side), and the steel frame is constructed by filling with filler materials such as stone. The weight of the steel frame itself and the filler materials allows the steel frame to resist earth pressure from the rear.

[0003] However, after many years of use, the screen material of a steel frame can become damaged or corroded due to aging, causing the screen material to come off. If the screen material comes off, it is expected that the fill material filled in the steel frame will leak out, so repairs to the existing steel frame have been required. For example, Patent Document 1 shown below has been published as a technology for repairing existing steel frames.

[0004] Patent Document 1 discloses a wall structure in which clip nuts are attached to flanges, and screen materials are replaced one by one via the clip nuts. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-223191 Summary of the Invention [Problem to be solved by the invention]

[0006] On the other hand, in the wall structure described in Patent Document 1, if the existing screen material is damaged, it is necessary to remove the existing screen material. However, when the existing screen material is removed, there is a possibility that the fill material will leak out. Also, if multiple existing screen materials are damaged, it is necessary to repair each damaged screen material one by one. For these reasons, the wall structure described in Patent Document 1 has the problem of high construction costs.

[0007] The present invention has been devised in consideration of the above-mentioned problems, and its object is to provide a steel frame repair structure and a steel frame repair method that allow steel frames to be repaired easily and at low cost without removing existing screen materials. [Means for solving the problem]

[0008] The steel frame repair structure of the first invention is a steel frame repair structure having upright H-shaped steel pillars and a horizontal frame erected between the pillars, and is characterized by comprising a panel frame having an upper frame, a lower frame, and a pair of left and right vertical frames, anti-slip fittings attached to the upper frame of the panel frame and hooked onto the horizontal frame, and panel mounting fittings attached to each of the vertical frames of the panel frame and having clamping portions that clamp the flanges of the pillars.

[0009] The steel frame repair structure according to the second invention is characterized in that, in the first invention, it further comprises another panel frame whose upper frame is connected to the lower frame of one of the panel frames.

[0010] The repair structure for a steel frame according to the third invention is characterized in that, in the first invention, the panel frame has one of wire mesh, expanded metal, or shaped steel fitted into the frame.

[0011] A steel frame repair structure according to a fourth aspect of the present invention is the same as that of the first aspect, wherein the panel mounting metal fittings are provided so that their cross sections in the erection direction are L-shaped.

[0012] The steel frame repair method of the fifth invention is a method for repairing a steel frame having upright H-shaped steel pillars and a horizontal frame erected between the pillars, and is characterized by having a horizontal frame mounting step in which anti-slip fittings attached to the upper frame of a panel frame consisting of an upper frame, a lower frame, and a pair of left and right vertical frames are hooked to the horizontal frame, and a vertical frame mounting step in which panel mounting fittings attached to the vertical frames of the panel frame clamp the flanges of the pillars. [Effects of the Invention]

[0013] According to the first to fifth inventions, the steel frame repair structure and repair method include anti-slip fittings attached to the upper frame of the panel frame and hooked onto the horizontal frame, and panel mounting fittings attached to the vertical frames of the panel frame and having clamping portions that clamp the flanges of the support posts. Therefore, the panel frame can be attached by hooking the anti-slip fittings onto the horizontal frame and clamping the panel mounting fittings onto the flanges. This allows the steel frame to be repaired easily and at low cost without removing the existing screen material.

[0014] In particular, according to the second invention, the steel frame repair structure further comprises another panel frame, the upper frame of which is connected to the lower frame of the first panel frame. This makes it possible to add panel frames as needed depending on the situation, and therefore makes it possible to properly repair the steel frame even when the lengths of the steel frame supports are different.

[0015] In particular, according to the third aspect of the present invention, the panel frame has either wire mesh, expanded metal, or shaped steel fitted into the frame, which makes it possible to handle an appropriate panel depending on the damage state of the steel frame.

[0016] In particular, according to the fourth aspect of the present invention, the panel mounting bracket has an L-shaped cross section in the erection direction. Therefore, by attaching the panel frame to the panel fixing part that extends perpendicularly from the clamping part to the outside of the flange, it is possible to create a space between the panel frame and the steel frame. This makes it possible to repair the steel frame at low cost even when the filled structure contains stone or other filling material or is unstable. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a diagram showing an example of a repair frame in this embodiment. [Figure 2] FIG. 2 is a diagram showing an example of a steel frame in this embodiment. [Figure 3] FIG. 3 is a diagram showing an example of the view taken along the line AA in FIG. 1 according to this embodiment. [Figure 4] FIG. 4 is a diagram showing an example of the CC arrow view of FIG. 1 in this embodiment. [Figure 5] FIG. 5 is a diagram showing an example of the DD arrow view of FIG. 1 in this embodiment. [Figure 6] FIG. 6 is a diagram showing an example of a panel frame in this embodiment. [Figure 7] Fig. 7(a) is a diagram showing an example of a horizontal view of the anti-slip fitting in this embodiment, and Fig. 7(b) is a diagram showing an example of a vertical view of the anti-slip fitting in this embodiment. [Figure 8] Fig. 8(a) is a diagram showing an example of a horizontal view of the panel mounting bracket in this embodiment, and Fig. 8(b) is a diagram showing an example of a vertical view of the anti-slip bracket in this embodiment. [Figure 9] FIG. 9 is a diagram showing an example of a panel connecting plate in this embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0018] An example of the repair structure 1 in this embodiment will be described with reference to the drawings.

[0019] The repair structure 1 will be described with reference to Figs. 1 to 5. Fig. 1 is a diagram showing an example of a repair frame 10 in this embodiment. Fig. 2 is a diagram showing an example of a steel frame 100 in this embodiment. Fig. 3 is a diagram showing an example of a view taken along arrow AA in Fig. 1 in this embodiment. Fig. 4 is a diagram showing an example of a view taken along arrow CC in Fig. 1 in this embodiment. Fig. 5 is a diagram showing an example of a view taken along arrow DD in Fig. 1 in this embodiment.

[0020] As shown in FIG. 1, the repair structure 1 comprises a front frame 9 consisting of a support column 2 erected on the front side (downstream side) of the steel frame 100 in the perpendicular direction y and a horizontal frame 3 erected on the support column 2, and a repair frame 10 provided on the front frame 9. The vertical direction z indicates the direction in which the support column 2 is erected. The horizontal direction x is a horizontal direction perpendicular to the vertical direction. The perpendicular direction y indicates the front direction perpendicular to the vertical direction z and the horizontal direction x. The horizontal direction x may also be the direction in which the horizontal frame 3 is erected. The perpendicular direction y may also be the direction from a filler structure (not shown) to the front frame 9. The perpendicular direction y may also be the direction toward downstream.

[0021] The steel frame 100 is a steel frame filled with a filler material such as stone, and is used as a dam, retaining wall, or revetment. As shown in FIG. 2 , the steel frame 100 is a steel frame formed by upright support columns 2, horizontal frames 3 erected on the support columns 2, and connecting frames 6, and the inside of the framework is filled with a filler material such as stone (not shown). The steel frame 100 may also include a screen material 21 erected on a front frame 9 made up of upright support columns 2 on the front side in the orthogonal direction y and horizontal frames 3 erected on the support columns 2. The front frame 9 is made up of the upright support columns 2 on the front side in the orthogonal direction y and the horizontal frame 3 erected on the support columns 2, and the side frame 8 is made up of the upright support columns 2 on the horizontal side in the horizontal direction x and connecting frames 6 erected on the support columns 2.

[0022] The support pillar 2 is a column erected in the vertical direction z, as shown in Fig. 1, for example. The support pillar 2 may also be erected at an angle to the vertical direction z, as shown in Fig. 3. As shown in Fig. 4, the support pillar 2 is, for example, an H-shaped steel beam composed of a web 23 and a pair of flanges 22 on both ends of the web 23. The support pillar 2 is preferably an H-shaped steel beam, but is not limited to this, and circular steel beams, square steel beams, CT steel beams, channel steel beams, etc. may also be used.

[0023] The horizontal frame 3 is a frame that is erected between the support columns 2. The horizontal frame 3 is attached to the support columns 2 using, for example, bolts or the like (not shown). As shown in FIG. 5, the horizontal frame 3 may be a channel steel whose cross section in the horizontal direction x is U-shaped and opens downward in the vertical direction z, but is not limited to this, and for example, H-shaped steel, circular steel, square steel, CT steel, L-shaped steel, etc. may also be used.

[0024] The screen material 21 is a linear beam member extending in the horizontal direction x. As shown in Fig. 3, the cross section of the screen material 21 in the horizontal direction x is a channel steel having a U-shape that opens downward in the vertical direction z, but is not limited to this and may have any shape.

[0025] As shown in FIG. 1 , the repair frame 10 is a frame that is installed on an existing front frame 9 and repairs the front frame 9. The repair frame 10 includes a panel frame 12 consisting of a pair of upper and lower frames 121 and 123, and a pair of left and right vertical frames 122; anti-slip brackets 11 that are attached to the upper frame 121 of the panel frame 12 and hooked onto the horizontal frame 3; and panel mounting brackets 13 that are attached to the vertical frames 122 of the panel frame 12 and clamp the posts 2. The repair frame 10 may also include any number of panel frames 12, each with the upper frame 121 connected to the lower frame 123 of the panel frame 12 via a panel connecting plate 14. The repair frame 10 may include, for example, any number of panel frames 12b, each with the upper frame 121 connected to the lower frame 123 of the panel frame 12a, and any number of panel frames 12c, each with the upper frame 121 connected to the lower frame 123 of the panel frame 12b.

[0026] 6 is a diagram showing an example of the panel frame 12 in this embodiment. As shown in Fig. 6, the panel frame 12 includes a pair of upper and lower frames 121 and 123 extending in the horizontal direction x, a pair of left and right vertical frames 122, and a panel 124 fitted between the upper frame 121, the lower frame 123, and the vertical frames 122.

[0027] The upper frame 121, the lower frame 123, and the vertical frame 122 are each a frame that extends in one direction. The cross-sectional shape of the upper frame 121, the lower frame 123, and the vertical frame 122 in the longitudinal direction is L-shaped, but is not limited to this and may be any shape.

[0028] The panels 124 may be formed from, for example, wire mesh, expanded metal, or structural steel. The panels 124 are attached to the upper frame 121, the lower frame 123, and the vertical frame 122 by, for example, welding or bolts, but are not limited to this and may be attached by any method.

[0029] FIG. 7(a) shows an example of the anti-slip bracket 11 of this embodiment as viewed in the horizontal direction x. FIG. 7(b) shows an example of the anti-slip bracket 11 of this embodiment as viewed in the vertical direction z. As shown in FIG. 7(a), the anti-slip bracket 11 has, in its cross-sectional shape in the horizontal direction x, a hook portion 111 extending in the perpendicular direction y and a panel mounting portion 112 bent obliquely from the hook portion 111 toward the vertical direction z. The angle B between the hook portion 111 and the panel mounting portion 112 is preferably set so that the repair frame 10 can be attached to the support 2 and the horizontal frame 3, depending on the inclination angle of the support 2 with respect to the vertical direction z. However, any obtuse angle greater than 90° and less than 180° may be used. Furthermore, the anti-slip bracket 11 may have a bolt hole 113 opened in the panel mounting portion 112, as shown in FIG. 7(b).

[0030] FIG. 8(a) is a diagram showing an example of the panel mounting bracket 13 of this embodiment as viewed in the horizontal direction x. FIG. 8(b) is a diagram showing an example of the panel mounting bracket 13 of this embodiment as viewed in the vertical direction z. As shown in FIG. 8(a), the panel mounting bracket 13 has an L-shaped cross section in the vertical direction z. The panel mounting bracket 13 has a first clamping portion 131 extending in the horizontal direction x and a panel fixing portion 132 extending from the first clamping portion 131 in the perpendicular direction y. The panel mounting bracket 13 may also have a clamping portion 135 consisting of the first clamping portion 131 and a second clamping portion 133 extending from the panel fixing portion 132 in the horizontal direction x and juxtaposed to the first clamping portion 131 at a distance E. The panel mounting bracket 13 may also have a bolt hole 134 opened in the panel fixing portion 132 as shown in FIG. 8(b). 4, the distance E between the first clamping portion 131 and the second clamping portion 133 is set so that the flange 22 can be clamped. Furthermore, the panel mounting bracket 13 may be set so that the length of the panel fixing portion 132 in the orthogonal direction y varies depending on the state of fill material in the fill structure (not shown).

[0031] 9 is a diagram showing an example of the panel connecting plate 14 in this embodiment. As shown in FIG. 9, the panel connecting plate 14 is a plate in which a plurality of bolt holes 141 are opened.

[0032] Next, the mounting structure of the repair frame 10 in this embodiment will be described with reference to the drawings.

[0033] As shown in FIGS. 1 and 5, the slippage prevention fitting 11 is attached to the panel frame 12 by joining the panel attachment portion 112 to the upper frame 121 of the panel frame 12 using bolts 33, nuts 34, etc.

[0034] The anti-slip fitting 11 is hooked to the horizontal frame 3 by bringing the hooking portion 111 into contact with the upper side of the horizontal frame 3. The anti-slip fitting 11 may also be attached to the horizontal frame 3 using bolts or the like (not shown).

[0035] As shown in FIG. 4, the panel mounting metal fitting 13 is attached to the panel frame 12 by joining the panel fixing portion 132 to the vertical frame 122 of the panel frame 12 using bolts 31, nuts 32, and the like.

[0036] The panel mounting bracket 13 clamps the flange 22 by inserting the first clamping portion 131 into the inside of the flange 22 and clamping the second clamping portion 133 from the outside of the flange 22. The panel mounting bracket 13 may also be attached to the flange 22 using bolts or the like (not shown).

[0037] 1, the panel connecting plate 14 is attached to the lower frame 123 of one panel frame 12 and the upper frame 121 of another panel frame 12, thereby connecting the two panel frames 12. The panel connecting plate 14 is attached to, for example, the lower frame 123 of the panel frame 12a and the upper frame 121 of the panel frame 12b, thereby connecting the panel frames 12a and 12b.

[0038] Next, we will explain the construction method of the repair structure 1 in this embodiment. The construction method includes a horizontal frame mounting step in which the slippage prevention brackets 11 attached to the upper frame 121 of the panel frame 12 are hooked to the horizontal frame 3, and a vertical frame mounting step in which the flanges 22 of the support 2 are clamped between the panel mounting brackets 13 attached to the vertical frames 122 of the panel frame 12.

[0039] First, in the horizontal frame mounting step, as shown in Figures 1 and 5, the panel frame 12 is mounted by hooking the hook portions 111 of the anti-slip fittings 11 attached to the upper frame 121 of the panel frame 12 onto the upper side of the horizontal frame 3. The anti-slip fittings 11 may be mounted to the panel frame 12 during construction, or may be mounted in advance before construction.

[0040] In addition, in the horizontal frame mounting step, the slippage prevention fittings 11 may be mounted to the horizontal frame 3 using bolts or the like (not shown).

[0041] Next, in the vertical frame mounting step, as shown in Figures 1 and 4, the clamping portion 135 of the panel mounting bracket 13 attached to the vertical frame 122 of the panel frame 12 is clamped by the flange 22 of the support 2. In this case, the first clamping portion 131 of the panel mounting bracket 13 is inserted inside the flange 22, and the second clamping portion 133 is clamped from the outside of the flange 22, thereby clamping the panel mounting bracket 13 to the flange 22. The panel mounting bracket 13 may be attached to the panel frame 12 during construction, or may be attached in advance before construction.

[0042] In addition, in the vertical frame mounting step, the panel mounting bracket 13 may be attached to the flange 22 using bolts or the like (not shown).

[0043] The above-described steps complete the construction of the repair structure 1 in this embodiment. Furthermore, the construction of the repair structure 1 in this embodiment is not limited to the above-described method and procedure, and may be carried out by any method and procedure.

[0044] The repair structure 1 according to this embodiment has been described above. The repair structure 1 according to this embodiment includes anti-slip brackets 11 attached to the upper frame 121 of the panel frame 12 and hooked to the horizontal frame 3, and panel mounting brackets 13 attached to the vertical frames 122 of the panel frame 12 and having clamping portions 135 that clamp the flanges 22 of the support posts 2. The panel frame 12 can be mounted by hooking the anti-slip brackets 11 to the horizontal frame 3 and clamping the panel mounting brackets 13 to the flanges 22. This allows the panel frame 12 to be mounted on the front side of the screen material 21 without removing the screen material 21, making it possible to easily repair the steel frame 100 at low cost.

[0045] Furthermore, the repair structure 1 according to this embodiment further includes another panel frame 12 in which the upper frame 121 is connected to the lower frame 123 of one panel frame 12. This makes it possible to add panel frames 12 as desired depending on the situation, and therefore makes it possible to appropriately repair the steel frame 100 even when the lengths of the supports 2 of the steel frame 100 are different.

[0046] Furthermore, the panel frame 12 according to this embodiment has either wire mesh, expanded metal, or shaped steel fitted into the frame, which makes it possible to handle an appropriate panel 124 depending on the damage state of the steel frame 100.

[0047] Furthermore, the panel mounting bracket 13 according to this embodiment has an L-shaped cross section in the vertical direction z. Therefore, by attaching the panel frame 12 to the panel fixing portion 132 extending from the clamping portion 135 in the perpendicular direction y, which is outside the flange 22, it is possible to provide a space between the panel frame 12 and the front frame 9. This makes it possible to repair the steel frame 100 at low cost even when the filled structure (not shown) contains stones or other filler material or is unstable. Furthermore, if the space between the panel frame 12 and the steel frame 100 is large, additional filler material such as stones may be placed in the gap.

[0048] Furthermore, in its cross-sectional shape in the horizontal direction x, the slippage prevention fitting 11 according to this embodiment has a hook portion 111 extending in the perpendicular direction y, and a panel mounting portion 112 bent diagonally from the hook portion 111 toward the vertical direction z. This causes the panel frame 12 to tilt in the perpendicular direction y away from the horizontal frame 3 in the opposite direction to the vertical direction z, making it possible to provide a space between the panel frame 12 and the front frame 9. This makes it possible to repair the steel frame 100 at low cost even when the filled structure (not shown) contains filling material such as stone or is unstable.

[0049] Furthermore, the panel mounting bracket 13 according to this embodiment may be provided so that the length of the panel fixing portion 132 in the orthogonal direction y varies depending on the fill level of the fill material in the filled structure (not shown). This makes it possible to provide an appropriate amount of space between the panel frame 12 and the front frame 9 depending on the fill level of the fill material in the filled structure, for example, by changing the length of the panel fixing portion 132 in the orthogonal direction y depending on the fill level of the fill material in the filled structure. This makes it possible to more appropriately repair the steel frame 100 at low cost, even when the filled structure (not shown) is filled with fill material such as stone or is unstable.

[0050] Although the embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the inventions and their equivalents as defined in the claims. [Explanation of symbols]

[0051] 1 Repair structure 2 pillars 3 horizontal frames 6 Connecting Frame 8 Side Frame 9 Front frame 10 Repair frame 11 Anti-slip bracket 12 Panel Frame 13 Panel mounting bracket 14 Panel connecting plate 21 Screen material 22 flange 23 Web 31 volts 32 Nut 33 volts 34 Nut 100 steel frame 111 Latch part 112 Panel mounting part 113 Bolt holes 121 Upper Frame 122 vertical frame 123 Bottom frame 124 panels 131 First clamping part 132 Panel fixing part 133 Second clamping part 134 bolt holes 135 Clamping part 141 Bolt holes

Claims

1. A steel frame repair structure having an H-shaped steel column and a horizontal frame installed between the columns, a panel frame having an upper frame, a lower frame, and a pair of left and right vertical frames; a slippage prevention fitting attached to the upper frame of the panel frame and hooked to the horizontal frame; and panel mounting brackets each attached to a vertical frame of the panel frame and having a clamping portion for clamping the flange of the support. A steel frame repair structure characterized by:

2. Further provided is another panel frame, the upper frame of which is connected to the lower frame of one of the panel frames. The repair structure for a steel frame according to claim 1,

3. The panel frame is made of wire mesh, expanded metal, or steel beams. The repair structure for a steel frame according to claim 1,

4. The panel mounting bracket has an L-shaped cross section in the erection direction. The repair structure for a steel frame according to claim 1,

5. A method for repairing a steel frame having upright H-shaped steel columns and a horizontal frame installed between the columns, a horizontal frame mounting step in which a slip prevention metal fitting attached to an upper frame of a panel frame consisting of an upper frame, a lower frame, and a pair of left and right vertical frames is hooked onto the horizontal frame; a vertical frame mounting step in which the flanges of the support posts are clamped between panel mounting brackets attached to the vertical frames of the panel frame. A method for repairing a steel frame, characterized by:

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