Reinforcement ring for structure and structure

Abstract

To provide a reinforcement ring for a structure that can restrain deformation and can be easily constructed.SOLUTION: A reinforcement ring 1 for a structure in the embodiment reinforces the structure constituted by connecting liner plates 61 to a circumferential direction W. The reinforcement ring 1 comprises three reinforcement ring pieces 2 drawing along the circumferential direction W and joint parts 3 connecting the reinforcement ring pieces 2 adjacent to each other in the circumferential direction W. The joint parts 3 exist at three positions. The joint parts 3 are pin junction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a structural reinforcing ring for reinforcing a structure formed by connecting plate-like members such as liner plates in the circumferential direction, and to the structure itself. [Background technology]

[0002] To increase the strength of a liner plate, a reinforcing ring may be provided along the flange in the circumferential direction of the liner plate. The reinforcing ring is generally formed by bolting together multiple reinforcing ring pieces made of H-shaped steel via joint plates. The flanges of the multiple reinforcing ring pieces are placed on the natural ground side and inside the tunnel, with the ends of the reinforcing ring pieces facing each other in the circumferential direction, and the reinforcing ring pieces are manually joined together by workers inside the tunnel to form a reinforcing ring with a closed cross-sectional shape, such as a circle, oval, or rectangle, that matches the cross-sectional shape of the liner plate. For example, Patent Documents 1 to 3 disclose technologies related to liner plate reinforcing rings.

[0003] The liner plate reinforcing ring of Patent Document 1 is characterized in that a channel steel is used as a reinforcing ring in the circumferential direction of the liner plate, and the flange portion of the channel steel is attached so as to be positioned in the direction in which construction progresses.

[0004] The joint structure of the reinforcing ring for liner plates in Patent Document 2 is such that the joint plate provided on the ground side flange of the reinforcing ring piece has an upper joint piece provided on the top of the ground side flange of the opposing reinforcing ring piece, and one lower joint piece provided on the bottom spanning both ends of the reinforcing ring piece, and the upper joint piece fits into a recess provided in the lower joint piece, thereby abutting in a manner that allows stress to be transmitted, and the lower joint piece abuts against the upper joint piece fixed to the top of the ground side flange in a manner that allows stress to be transmitted.

[0005] The joint structure of the reinforcing ring for liner plates in Patent Document 3 is such that the joint plate provided on the ground side flange of one of the reinforcing ring pieces has a pre-fixed portion that is fitted to one of the ground side flanges and has bolt holes that match the bolt holes provided in the upper and lower halves of the ground side flange, and an extended portion that is fitted to the other ground side flange and has bolt holes that match the bolt holes provided in the lower half of the ground side flange, so that the pre-fixed portion of the joint plate is fixed to one of the ground side flanges and the extended portion of the joint plate is fitted to the other ground side flange, and nuts are tightened onto bolts inserted into the matched bolt holes so that the extended portion of the joint plate is bolted only to the lower half of the ground side flange of the other reinforcing ring piece, and is fixed across both ground side flanges. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Utility Model Application Publication No. 57-137699 [Patent Document 2] Japanese Patent Application Laid-Open No. 2011-140794 [Patent Document 3] Japanese Patent Application Laid-Open No. 2011-140840 Summary of the Invention [Problem to be solved by the invention]

[0007] The techniques disclosed in Patent Documents 1 to 3 use four or more reinforcing ring pieces such as H-shaped steel, and therefore require four or more joint plates. FIG. 14 is a schematic plan view showing an example of a conventional reinforcing ring for a liner plate. As shown in FIG. 14(a), a conventional reinforcing ring for a liner plate 91 includes four reinforcing ring pieces 92, e.g., H-shaped steel, and four joint portions 93 that join adjacent reinforcing ring pieces 92. Even if the reinforcing ring for a liner plate 91 is simply a closed cross-section in which the lengths of the four reinforcing ring pieces 92 are determined, the cross-sectional shape shown in FIG. 14(a) is not maintained. When an external force is applied, as shown in FIG. 14(b), the reinforcing ring for a liner plate 91 cannot resist bending and is prone to structural deformation. This is because, when four or more reinforcing ring pieces 92 are used, the joint portions 93 must be rigidly joined by bolts via splice plates, as in the conventional method, to prevent deformation of the reinforcing ring for a liner plate 91. Normally, when the joint portion 93 is rigidly joined as in the past, the strength of the joint portion 93 is set to exceed 75% of the strength of the H-shaped steel that constitutes the reinforcing ring piece 92. Furthermore, when the joint portion 93 is rigidly joined, the amount of processing required for the joint increases, resulting in higher costs. In addition, when there are four or more joint portions 93, the number of joint locations increases, which makes construction time longer.

[0008] Therefore, the present invention was devised in consideration of the above-mentioned circumstances, and its object is to provide a reinforcement ring for a structure that can suppress deformation and can be easily installed. [Means for solving the problem]

[0009] The reinforcing ring for a structure of the present invention is a reinforcing ring for a structure for reinforcing a structure formed by connecting plate-shaped members in a circumferential direction, and is characterized in that it comprises two or three reinforcing ring pieces extending along the circumferential direction and joint portions joining adjacent reinforcing ring pieces in the circumferential direction, and the joint portions are located in two or three places.

[0010] The structure of the present invention is a structure formed by connecting plate-shaped members circumferentially, and comprises a wall body to which the plate-shaped members are connected circumferentially, and a structure reinforcing ring provided on the wall body, wherein the structure reinforcing ring comprises two or three reinforcing ring pieces extending along the circumferential direction and joint portions joining adjacent reinforcing ring pieces circumferentially, and the joint portions are located in two or three places. [Effects of the Invention]

[0011] According to the present invention, there are two or three reinforcing ring pieces. This stabilizes the shape of the reinforcing ring for structures that form a closed cross section. Therefore, even if the strength of the joints is low, deformation of the reinforcing ring for structures can be suppressed. Furthermore, according to the present invention, there are two or three joints. This means that there are fewer joints, making installation easier. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a side view showing a structure using an example of a structure reinforcing ring according to the first embodiment. [Figure 2] FIG. 2 is a schematic plan view showing an example of a structure reinforcing ring in the first embodiment. [Figure 3] FIG. 3 is a diagram showing a structure using an example of the structure reinforcing ring according to the first embodiment. [Figure 4] Figure 4(a) is an oblique view showing an example of a joint portion of a structural reinforcement ring in the first embodiment, and Figure 4(b) is a cross-sectional view showing an example of a joint portion of a structural reinforcement ring in the first embodiment. [Figure 5] Figure 5(a) is an oblique view showing an example of a joint portion of a structural reinforcement ring in the second embodiment, and Figure 5(b) is a cross-sectional view showing an example of a joint portion of a structural reinforcement ring in the second embodiment. [Figure 6]Figure 6(a) is an oblique view showing an example of a joint portion of a structural reinforcement ring in the third embodiment, and Figure 6(b) is a cross-sectional view showing an example of a structural reinforcement ring in the third embodiment. [Figure 7] Figure 7(a) is an oblique view showing an example of a joint portion of a structural reinforcement ring in the fourth embodiment, and Figure 7(b) is a cross-sectional view showing an example of a joint portion of a structural reinforcement ring in the fourth embodiment. [Figure 8] Figure 8(a) is an oblique view showing an example of a joint portion of a structural reinforcement ring in the fifth embodiment, and Figure 8(b) is a cross-sectional view showing an example of a joint portion of a structural reinforcement ring in the fifth embodiment. [Figure 9] FIG. 9 is a schematic plan view showing an example of a structure reinforcing ring according to the sixth embodiment. [Figure 10] 10(a) to 10(d) are schematic plan views showing modified examples of the structure reinforcing ring. [Figure 11] 11(a) to 11(f) are schematic plan views showing modified examples of the structure reinforcing ring. [Figure 12] 12(a) to 12(g) are schematic plan views showing modified examples of the structure reinforcing ring. [Figure 13] 13(a) to 13(h) are schematic plan views showing modified examples of the structure reinforcing ring. [Figure 14] FIG. 14(a) is a schematic diagram showing a conventional reinforcing ring for a liner plate, and FIG. 14(b) is a schematic plan view showing the conventional reinforcing ring for a liner plate when an external force is applied. DETAILED DESCRIPTION OF THE INVENTION

[0013] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments for carrying out a structural reinforcement ring and a structure to which the present invention is applied will be described in detail with reference to the drawings.

[0014] First Embodiment As shown in FIGS. 1 to 3, the structure reinforcing ring 1 is for reinforcing an annular structure 100 in which, for example, liner plates 61 as plate-like members are connected along the circumferential direction W and the ring axial direction Z.

[0015] The structure 100 is, for example, a drainage well or the like, and is constructed as an earth retaining structure. The structure 100 in which the structure reinforcement ring 1 is used is used in a vertical shaft or the like to which the structure reinforcement ring 1 is attached. The plate-like member may be a corrugated pipe or a sheet pile in addition to the liner plate 61. The structure may be a structure such as a waterway formed in a ring shape by connecting corrugated pipes, or a structure formed in a ring shape by connecting sheet piles. The wall 6 has a closed cross-sectional shape, and the outer shape of the wall 6 is formed, for example, in a circular shape. The outer shape of the wall 6 may be formed in a rectangular shape, a rounded rectangle shape, an oval shape, or the like, as will be described later.

[0016] The structure 100 comprises a wall body 6 to which liner plates 61 are connected in the circumferential direction, and a structure reinforcement ring 1 provided on the wall body 6. The wall body 6 is composed of one stage of liner plates 61. In the structure 100, one stage of the wall body 6 is arranged between a pair of structure reinforcement rings 1, 1 spaced apart vertically. In other words, the structure 100 is constructed by alternately arranging one stage of the wall body 6 and the structure reinforcement ring 1. Note that the structure 100 may also be constructed by arranging multiple stages of the wall body 6 between a pair of structure reinforcement rings 1 spaced apart vertically.

[0017] The reinforcing ring 1 for structures is configured with a closed cross section. The reinforcing ring 1 for structures is formed in a circular shape. The reinforcing ring 1 for structures comprises three reinforcing ring pieces 2 extending along the circumferential direction W, and a joint portion 3 that joins adjacent reinforcing ring pieces 2 in the circumferential direction. The reinforcing ring 1 for structures is configured with a closed cross section in which the three reinforcing ring pieces 2 are joined via the joint portion 3. The direction along the ring center axis C of the reinforcing ring 1 for structures is defined as the ring axial direction Z.

[0018] The reinforcing ring pieces 2 have the same length along the circumferential direction W. There are three joint portions 3.

[0019] The reinforcing ring piece 2 is made of, for example, an H-shaped steel. The reinforcing ring piece 2 has a web 21 and a pair of flanges 22, 23 arranged on both ends of the web 21. The web 21 has connecting holes 24 formed therein, into which connecting bolts 62 are provided for connecting a liner plate 61. In the structure, the liner plates 61 arranged on the upper and lower surfaces of the web 21 are connected to the web 21 by the connecting bolts 62. The flange 22 is the inner flange of the reinforcing ring 1 for a structure, and the flange 23 is the outer flange of the reinforcing ring 1 for a structure. In addition to the H-shaped steel, the reinforcing ring piece 2 may also be a channel steel, an angle steel, etc.

[0020] As shown in Figure 4, the joint portion 3 is a pin joint that does not bear bending moments around an axis parallel to the ring axis direction Z. Figure 4 is a diagram mainly showing one of the two or three joint portions 3 on the structural reinforcement ring 1. The joint portion 3 has a first mounting portion 32 that is provided on one reinforcing ring piece 2-1 and has a first mounting hole 33, a second mounting portion 34 that is provided on the other reinforcing ring piece 2-2 and has a second mounting hole 35, and a pin member 31 that is inserted into the first mounting hole 33 and the second mounting hole 35.

[0021] The pin member 31 is formed by bending a rod-shaped member such as a steel bar into an L shape. The surface is formed flat. The pin member 31 extends in a direction along the ring center axis C of the structure reinforcement ring.

[0022] The pin member 31 may be formed by bending a rod-shaped member into an L-shape, or may be formed by, for example, a bolt and nut. Even in this case, the joint portion 3 is a pin joint that does not bear bending moments around an axis parallel to the ring axis direction Z.

[0023] The first attachment portion 32 is attached to the upper surface of the web 21 of the reinforcing ring piece 2-1 by welding, etc. The first attachment portion 32 is disposed so as to protrude from the end portion in the circumferential direction W of the reinforcing ring piece 2-1.

[0024] The second attachment portion 34 is attached to the lower surface of the web 21 of the reinforcing ring piece 2-2 by welding, etc. The second attachment portion 34 is disposed so as to protrude from the end portion in the circumferential direction W of the reinforcing ring piece 2-2.

[0025] The first mounting portion 32 may be attached to the underside of the web 21 of the reinforcing ring piece 2-1 by welding or the like. The second mounting portion 34 is attached to the upper surface of the web 21 of the reinforcing ring piece 2-2 by welding or the like. For example, the first mounting portion 32 attached to the upper surface of the web 21 of the reinforcing ring piece 2-1 and the second mounting portion 34 attached to the upper surface of the web 21 of the reinforcing ring piece 2-1 are overlapped with each other and the pin member 31 is inserted therebetween. For example, the first mounting portion 32 attached to the lower surface of the web 21 of the reinforcing ring piece 2-1 and the second mounting portion 34 attached to the lower surface of the web 21 of the reinforcing ring piece 2-1 are overlapped with each other and the pin member 31 is inserted therebetween.

[0026] According to this embodiment, the reinforcing ring 1 is provided with three reinforcing ring pieces 2 extending along the circumferential direction W, and a joint portion 3 that joins adjacent reinforcing ring pieces 2 in the circumferential direction W. This stabilizes the shape of the reinforcing ring 1 for structures that form a closed cross section. Therefore, the strength of the joint portion 3 can be set to 75% or less of the strength of the reinforcing ring pieces 2. Therefore, even if the joint portion 3 is rigidly joined or is a pin joint with low joint strength, deformation of the reinforcing ring 1 for structures can be suppressed.

[0027] Furthermore, according to this embodiment, there are three joints 3. This reduces the number of joints, making installation easier.

[0028] According to this embodiment, the joint portion 3 is a pin joint. This allows the reinforcing ring pieces 2 to be joined together more easily than with a rigid joint. This makes construction even easier.

[0029] According to this embodiment, the joint portion 3 has a first mounting portion 32 provided on one of the reinforcing ring pieces 2-1 and having a first mounting hole 33, a second mounting portion 34 provided on the other reinforcing ring piece 2-2 and having a second mounting hole 35, and a pin member 31 inserted into the first mounting hole 33 and the second mounting hole 35, and the pin member 31 extends in the ring axis direction Z along the ring center axis C of the structure reinforcing ring 1. This makes it possible to join the reinforcing ring pieces 2 together more easily than with rigid joining, thereby making construction even easier.

[0030] In the above-described embodiment, the joint 3 is a pin joint, but the joint 3 may be a rigid joint using a conventional splice plate and bolt. Even in this case, the joint 3 is provided in three places. This reduces the number of joints, making construction easier.

[0031] Second Embodiment Next, a structure reinforcement ring 1 in a second embodiment will be described. Below, differences from the above-described embodiment will be mainly described, and detailed descriptions of configurations similar to those of the above-described embodiment will be omitted as appropriate. As shown in Figure 5, in the second embodiment, the joint portion 3 differs from that of the above-described embodiment. Figure 5 is a diagram mainly showing one of the two or three joint portions 3 on the structure reinforcement ring 1.

[0032] As shown in Figure 5, the joint part 3 is a pin joint that does not bear bending moments around an axis parallel to the ring axis direction Z. The joint part 3 has a first mounting part 32 that is provided on one of the reinforcing ring pieces 2-1 and has a first mounting hole 33, a second mounting hole 35 that is provided on the other reinforcing ring piece 2-2, and a pin member 31 that is inserted into the first mounting hole 33 and the second mounting hole 35. Each of the first mounting parts 32 is made of a flat plate.

[0033] The first mounting portion 32 is attached to the upper surface of the web 21 of the reinforcing ring piece 2-1 by welding or the like. The first mounting portion 32 is arranged to protrude from the end of the reinforcing ring piece 2-1 in the circumferential direction W. The first mounting portion 32 is arranged across the reinforcing ring piece 2-1 and the reinforcing ring piece 2-2.

[0034] The second mounting hole 35 is formed in the web 21 of the reinforcing ring piece 2-2.

[0035] According to this embodiment, the joint portion 3 has a first mounting portion 32 provided on one of the reinforcing ring pieces 2-1 and having a first mounting hole 33, a second mounting hole 35 provided on the other reinforcing ring piece 2-2, and a pin member 31 inserted into the first mounting hole 33 and the second mounting hole 35, and the pin member 31 extends in the ring axis direction Z along the ring center axis C of the structure reinforcing ring 1. This makes it possible to join the reinforcing ring pieces 2 together more easily than with rigid joining, thereby making construction even easier.

[0036] Third Embodiment Next, a structure reinforcement ring 1 in a third embodiment will be described. As shown in Figure 6, the third embodiment differs from the above-described embodiments in the joint portion 3. Figure 6 is a diagram mainly showing one of two or three joint portions 3 on the structure reinforcement ring 1.

[0037] 6, the joint portion 3 is a pin joint that does not bear bending moments around an axis parallel to the ring axis direction Z. The joint portion 3 has a first mounting portion 32 that is provided on one of the reinforcing ring pieces 2-1 and has a first mounting hole 33, a second mounting portion 34 that is provided on the other reinforcing ring piece 2-2 and has a second mounting hole 35, and a pin member 31 that is inserted into the first mounting hole 33 and the second mounting hole 35.

[0038] The first mounting portion 32 is attached to the inner flange 22 of the reinforcing ring piece 2-1 by welding or the like. The first mounting portion 32 is arranged to protrude from the end of the reinforcing ring piece 2-1 in the circumferential direction W. The first mounting portion 32 is arranged across the reinforcing ring piece 2-1 and the reinforcing ring piece 2-2.

[0039] The second attachment portion 34 is attached to the inner flange 22 of the reinforcing ring piece 2-2 by welding, etc. The second attachment portion 34 is disposed at an end portion in the circumferential direction W of the reinforcing ring piece 2-2.

[0040] According to this embodiment, the joint portion 3 has a first mounting portion 32 provided on one of the reinforcing ring pieces 2-1 and having a first mounting hole 33, a second mounting portion 34 provided on the other reinforcing ring piece 2-2 and having a second mounting hole 35, and a pin member 31 inserted into the first mounting hole 33 and the second mounting hole 35, and the pin member 31 extends in the ring axis direction Z along the ring center axis C of the structure reinforcing ring 1. This makes it possible to join the reinforcing ring pieces 2 together more easily than with rigid joining, thereby making construction even easier.

[0041] According to this embodiment, the first mounting portion 32 is attached to the inner flange 22 of one of the reinforcing ring pieces 2-1, and the second mounting portion 34 is attached to the inner flange 22 of the other reinforcing ring piece 2-1. This allows the reinforcing ring pieces 2 adjacent to each other in the circumferential direction W to be joined from the inside of the structure reinforcing ring 1. This makes construction even easier.

[0042] <Fourth embodiment> Next, a structure reinforcement ring 1 in a fourth embodiment will be described. As shown in Figure 7, the fourth embodiment differs from the above-described embodiments in the joint portion 3. Figure 7 is a diagram mainly showing one of two or three joint portions 3 on the structure reinforcement ring 1.

[0043] 7, the joint part 3 is a pin joint that does not bear bending moments around an axis parallel to the ring axis direction Z. The joint part 3 has a first mounting part 32 that is provided on one of the reinforcing ring pieces 2-1 and has a first mounting hole 33, a second mounting part 34 that is provided on the other reinforcing ring piece 2-2 and has a second mounting hole 35, and a pin member 31 that is inserted into the first mounting hole 33 and the second mounting hole 35.

[0044] The first mounting portion 32 is attached to the outer flange 23 of the reinforcing ring piece 2-1 by welding or the like. The first mounting portion 32 is arranged to protrude from the end of the reinforcing ring piece 2-1 in the circumferential direction W. The first mounting portion 32 is arranged across the reinforcing ring piece 2-1 and the reinforcing ring piece 2-2.

[0045] The second attachment portion 34 is attached to the outer flange 23 of the reinforcing ring piece 2-2 by welding, etc. The second attachment portion 34 is disposed at an end portion in the circumferential direction W of the reinforcing ring piece 2-2.

[0046] According to this embodiment, the joint portion 3 has a first mounting portion 32 provided on one of the reinforcing ring pieces 2-1 and having a first mounting hole 33, a second mounting portion 34 provided on the other reinforcing ring piece 2-2 and having a second mounting hole 35, and a pin member 31 inserted into the first mounting hole 33 and the second mounting hole 35, and the pin member 31 extends in the ring axis direction Z along the ring center axis C of the structure reinforcing ring 1. This makes it possible to join the reinforcing ring pieces 2 together more easily than with rigid joining, thereby making construction even easier.

[0047] Fifth Embodiment Next, a structure reinforcement ring 1 in a fifth embodiment will be described. As shown in Figure 8, the fifth embodiment differs from the above-mentioned embodiments in the joint portion 3. Figure 8 is a diagram mainly showing one of two or three joint portions 3 on the structure reinforcement ring 1.

[0048] As shown in Figure 8, the joint part 3 is a pin joint that does not bear bending moments around an axis parallel to the ring axis direction Z. The joint part 3 has a first mounting part 36 that is provided on one of the reinforcing ring pieces 2-1 and has a first mounting hole 33, a second mounting part 37 that is provided on the other reinforcing ring piece 2-2 and has a second mounting hole 35, and a pin member 31 that is inserted into the first mounting hole 33 and the second mounting hole 35. The first mounting part 36 and the second mounting part 37 each use a cylindrical member.

[0049] The first attachment portion 36 is attached to the inner flange 22 of the reinforcing ring piece 2-1 via a splice plate by welding or the like. Two first attachment portions 36 are provided spaced apart in the ring axis direction Z.

[0050] The second mounting portion 37 is attached to the inner flange 22 of the reinforcing ring piece 2-2 via a splice plate by welding or the like. The second mounting portion 37 is disposed between the two first mounting portions 36 spaced apart in the ring axis direction Z.

[0051] According to this embodiment, the joint portion 3 has a first mounting portion 36 provided on one of the reinforcing ring pieces 2-1 and having a first mounting hole 33, a second mounting portion 37 provided on the other reinforcing ring piece 2-2 and having a second mounting hole 35, and a pin member 31 inserted into the first mounting hole 33 and the second mounting hole 35, and the pin member 31 extends in the ring axis direction Z along the ring center axis C of the structure reinforcing ring 1. This makes it possible to join the reinforcing ring pieces 2 together more easily than with rigid joining, thereby making construction even easier.

[0052] According to this embodiment, the first mounting portion 36 is attached to the inner flange 22 of one of the reinforcing ring pieces 2-1, and the second mounting portion 37 is attached to the inner flange 22 of the other reinforcing ring piece 2-2. This allows the reinforcing ring pieces 2 adjacent to each other in the circumferential direction W to be joined from the inside of the structure reinforcing ring 1. This makes installation even easier.

[0053] Sixth Embodiment Next, a sixth embodiment of the reinforcing ring 1 for a structure will be described. As shown in Fig. 9, the sixth embodiment has two reinforcing ring pieces 2 and two joint portions 3. In this embodiment, the lengths of the two reinforcing ring pieces 2 along the circumferential direction W are the same, but in the present invention, they may be different.

[0054] According to this embodiment, the reinforcing ring 1 is provided with two reinforcing ring pieces 2 extending along the circumferential direction W, and a joint portion 3 that joins adjacent reinforcing ring pieces 2 in the circumferential direction W. This stabilizes the shape of the reinforcing ring 1 for structures that form a closed cross section. Therefore, the strength of the joint portion 3 can be set to 75% or less of the strength of the reinforcing ring pieces 2. Therefore, even if the joint portion 3 is rigidly joined or is a pin joint with low joint strength, deformation of the reinforcing ring 1 for structures can be suppressed.

[0055] Furthermore, according to this embodiment, there are two joints 3. This reduces the number of joints, making installation easier.

[0056] <Modification: Circular> Next, a description will be given of modified examples of the structure reinforcement ring 1. As shown in Figures 10(a) to 10(d), the structure reinforcement ring 1 is formed in a circular shape.

[0057] As shown in Figures 10(a) to 10(c), the reinforcing ring 1 for a structure has three reinforcing ring pieces 2 and three joint portions 3. In the example shown in Figures 10(a) to 10(c), of the three reinforcing ring pieces 2, the lengths of two of the reinforcing ring pieces 2 along the circumferential direction W are equal and different from the length of the remaining reinforcing ring piece 2 along the circumferential direction W. In the present invention, the lengths of the reinforcing ring pieces 2 along the circumferential direction W may be different from one another.

[0058] As shown in Figure 10(d), the structural reinforcement ring 1 has two reinforcing ring pieces 2 and two joint portions 3. The lengths of the two reinforcing ring pieces 2 along the circumferential direction W are different.

[0059] <Modifications: Rectangular, R-rectangular> 11(a) to 11(f), the structure reinforcement ring 1 is formed in a rectangular shape. Note that the structure reinforcement ring 1 may also be a so-called rounded rectangle, in which the corners of the rectangle are arc-shaped.

[0060] As shown in Figures 11(a) to 11(c), the reinforcing ring 1 for a structure has three reinforcing ring pieces 2 and three joint portions 3. As shown in Figures 11(a) and 11(c), the lengths of the three reinforcing ring pieces 2 along the circumferential direction W are different from each other. As shown in Figure 11(b), of the three reinforcing ring pieces 2, the lengths of two reinforcing ring pieces 2 along the circumferential direction W are equal and different from the length of the remaining reinforcing ring piece 2 along the circumferential direction W.

[0061] As shown in Figures 11(d) to 11(f), the structural reinforcement ring 1 has two reinforcing ring pieces 2 and two joint portions 3. As shown in Figures 11(d) and 11(f), the lengths of each reinforcing ring piece 2 along the circumferential direction W are equal. As shown in Figure 11(e), the lengths of each reinforcing ring piece 2 along the circumferential direction W are different.

[0062] <Modification: Oval shape> As shown in Figs. 12(a) to 12(g), the structure reinforcing ring 1 is formed in an oval shape.

[0063] As shown in Figures 12(a) to 12(d), the reinforcing ring 1 for a structure has three reinforcing ring pieces 2 and three joint portions 3. As shown in Figures 12(a) and 12(d), the lengths of the three reinforcing ring pieces 2 along the circumferential direction W are different. As shown in Figures 12(b) and 12(c), of the three reinforcing ring pieces 2, the lengths of two reinforcing ring pieces 2 along the circumferential direction W are equal and different from the length of the remaining reinforcing ring piece 2 along the circumferential direction W.

[0064] As shown in Figures 12(e) to 12(g), the structure reinforcement ring 1 has two reinforcing ring pieces 2 and two joint portions 3. The lengths of the reinforcing ring pieces 2 along the circumferential direction W are equal.

[0065] <Modification: Pipe arch shape> As shown in Figs. 13(a) to 13(h), the structure reinforcement ring 1 is formed in a pipe arch shape.

[0066] As shown in Figures 13(a) to 13(d), the reinforcing ring 1 for a structure has three reinforcing ring pieces 2 and three joint portions 3. Of the three reinforcing ring pieces 2, the lengths of two of the reinforcing ring pieces 2 along the circumferential direction W are equal, but the length of the remaining reinforcing ring piece 2 along the circumferential direction W is different.

[0067] As shown in Figures 13(e) to 13(h), the structure reinforcing ring 1 has two reinforcing ring pieces 2 and two joint portions 3. As shown in Figure 13(e), the lengths of each reinforcing ring piece 2 along the circumferential direction W are equal. As shown in Figures 13(f) to 13(h), the lengths of each reinforcing ring piece 2 along the circumferential direction W are different.

[0068] Although the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. Furthermore, the present invention can be embodied in various novel forms in addition to the above-described embodiments. Therefore, various omissions, substitutions, and modifications are possible in the above-described embodiments without departing from the spirit and scope of the present invention. Such novel forms and modifications are included within the scope and spirit of the present invention, as well as within the scope of the inventions set forth in the claims and equivalents of the inventions set forth in the claims. [Explanation of symbols]

[0069] 100: Structure 1: Reinforcement ring for structures 2: Reinforcement ring piece 2-1: Reinforcement ring piece 2-2: Reinforcement ring piece 21: Web 22: Flange 23: Flange 24: Junction hole 3: Joint 31: Pin member 32: First mounting part 33: First mounting hole 34: Second mounting part 35: Second mounting hole 36: First mounting part 37: Second mounting part 61: Liner plate 62: Joint bolt 91: Reinforcement ring for liner plate 92: Reinforcement ring piece 93: Joint C: Ring center axis W: Circumferential direction Z: Ring axis direction

Claims

1. A structural reinforcing ring for reinforcing a structure configured by connecting plate-like members in a circumferential direction, two or three reinforcing ring pieces extending along the circumferential direction, and a joint portion joining the reinforcing ring pieces adjacent to each other in the circumferential direction, The joints are provided at two or three locations. A reinforcing ring for a structure, characterized by:

2. The joint is a pin joint.

2. The structural reinforcing ring according to claim 1, wherein:

3. The joint portion is a first mounting portion provided on one of the reinforcing ring pieces and having a first mounting hole; a second mounting portion provided on the other reinforcing ring piece and having a second mounting hole; a pin member inserted into the first mounting hole and the second mounting hole; The pin member extends in a direction along the ring central axis of the structural reinforcement ring.

3. The structural reinforcing ring according to claim 2, wherein:

4. the first attachment portion is provided on the inner side of one of the reinforcing ring pieces, The second mounting portion is provided on the inner side of the other reinforcing ring piece.

4. The structural reinforcing ring according to claim 3, wherein:

5. The joint portion is a first mounting portion provided on one of the reinforcing ring pieces and having a first mounting hole; a second mounting hole formed in the other reinforcing ring piece; a pin member inserted into the first mounting hole and the second mounting hole; The pin member extends in a direction along the central axis of the structure reinforcement ring.

3. The structural reinforcing ring according to claim 2, wherein:

6. A structure formed by connecting plate-like members in a circumferential direction, a wall body to which the plate-like members are connected in a circumferential direction; and a structural reinforcing ring provided on the wall body, The structural reinforcement ring includes two or three reinforcing ring pieces extending along the circumferential direction, and a joint portion that joins the reinforcing ring pieces adjacent to each other in the circumferential direction, The joints are provided at two or three locations. A structure characterized by:

7. The wall body is disposed between the structural reinforcement rings spaced apart from each other in the vertical direction.

7. The structure according to claim 6,

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