JP2006283391A - Reinforcing method for steel pipe column, reinforced steel pipe column, and implement for hanging reinforcing material for steel pipe column - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for simply and inexpensively reinforcing a steel pipe column in a short construction period, without reference to a location for erecting the steel pipe column, the reinforced steel pipe column, and an implement for hanging a reinforcing material for the steel pipe column. <P>SOLUTION: A plurality of rod-shaped members 51 are inserted into hollow parts, respectively; the axial centers of the plurality of inserted rod-shaped members 51 pass through the circumference of an identical circle with respect to a horizontal plane; the rod-shaped members 51 are arranged in such a manner that all intervals among the axial centers of the adjacent rod-shaped members 51 are equal to one another; a smaller number of rod-shaped members 51 than that of the plurality of arranged rod-shaped members 51 are inserted into hollow parts, respectively: the axial centers of the inserted rod-shaped members pass through the circumference of an identical circle smaller in diameter than the identical circle through which the axial centers of the plurality of arranged rod-shaped members 51 pass; and the rod-shaped members 51 are arranged in such a manner that all intervals among the axial centers of the adjacent rod-shaped members 51 are equal to one another. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a steel tube column reinforcing method for reinforcing an existing steel tube column, a reinforced steel tube column, and a steel pipe column reinforcing material suspension jig.

  In order to reinforce a steel pipe column in response to aging of the steel pipe column, etc., a method of reinforcing the outer periphery of a conventional steel pipe column by winding it with a reinforcing material such as an aramid fiber sheet has been employed (for example, Patent Document 1). reference).

Moreover, the technique which reinforces by inject | pouring a reinforcing material in a hollow part is also disclosed (for example, refer patent document 2).
JP-A-6-322999 JP 2002-276201 A

  In the above prior art, it is necessary to perform excavation from the ground in order to reinforce the ground from the ground including the ground of the steel pipe column. For this reason, depending on where the steel pipe pillars are erected, it is often necessary to tear down the fences of houses near the steel pipe pillars or stone walls on inclined slopes in order to carry out the excavation process. The entire construction process including the restoration work took time and the construction cost was high.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a simple and inexpensive method for reinforcing a steel pipe column, a reinforced steel pipe column, and a steel pipe that have a short construction period and do not depend on a standing position of the steel pipe column. An object of the present invention is to provide a jig for suspending a column reinforcing material.

  In order to achieve the above object, the invention according to claim 1 is a method of reinforcing a steel pipe column for reinforcing an existing steel pipe column, wherein the plurality of rod-shaped members are inserted into the hollow portion, and the insertion is performed. A plurality of rod members inserted in the first step, wherein the shaft centers of the plurality of rod members pass on the same circle with respect to the horizontal plane, and the intervals between the shaft centers of adjacent rod members are all equal. And a second step of injecting a gap filler that fills the gap between the inner side surfaces of the hollow part.

  According to a second aspect of the present invention, the plurality of rod-shaped members are respectively inserted into the hollow portions from the first openings formed on the side surfaces of the steel pipe columns, while the gap filler is inserted into the first openings. The gist is to insert into the hollow portion from a second opening formed in the lower portion of the.

  The gist of the invention described in claim 3 is that it is reinforced by the steel pipe column reinforcing method described in any one of claims 1 and 2.

  In the invention according to claim 4, a plurality of rod-shaped members as reinforcing members inserted into the hollow portions of the steel pipe columns in order to reinforce the existing steel tube columns are fastened to the upper ends of the plurality of rod-shaped members, respectively. A steel pipe column reinforcing material suspension jig that is arranged in the hollow portion by suspending a wire, the arc-shaped position fixing portion capable of contacting the inner surface of the hollow portion of the steel pipe column, and the position fixing Provided on a plane including the arc of the portion closer to the vertical central axis of the hollow portion than the position fixing portion, and has an opening surface parallel to the plane and fastened to the upper end of the rod-like member The gist of the present invention is to provide a suspension portion for suspending the rod-like member by supporting each wire through the wire.

  As is clear from the above description, according to the present invention, by providing the reinforcing portion in the hollow portion of the steel pipe column, the construction period is short and the steel pipe column is simple and inexpensive regardless of where the steel pipe column is erected. Reinforcing method, reinforced steel pipe column, and steel pipe column reinforcing material suspension jig.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

(First embodiment)
In the steel pipe column reinforcing method according to the first embodiment of the present invention, two openings are formed on the side surface of an existing steel tube column, and one of the openings (first opening) is used for inserting a reinforcing material. In order to inject a gap filler that fills the gap between the reinforcing material that can be formed in the hollow portion and the inner surface of the outer peripheral portion, the other opening (second opening) provided below the first opening. Use.

  A plurality of rod-shaped members (reinforcing rod-shaped members) as a reinforcing material are connected to an aramid rod, which is a rod-shaped member made of aramid fiber, by a connecting member on the lower side when the hollow portion of each aramid rod is inserted. It consists of atypical reinforcing bars of the same diameter.

By using such a rod-shaped member, the weight of the rod-shaped member itself is increased, and after the gap filler is injected, the rod-shaped member is prevented from rising due to buoyancy, and the reinforcing structure in the hollow portion is further stabilized. Thus, it is possible to increase the reinforcement strength.

  A stainless steel wire is fastened to the upper part of each aramid rod, and this wire is suspended by the reinforcing material suspension jig through an opening provided in the reinforcing material suspension jig of a steel pipe column to be described later. By supporting, the rod-shaped member is fixed in the empty portion.

  FIG. 1 is a partial cross-sectional view showing a schematic configuration of a steel pipe column reinforced by a reinforcing method according to the first embodiment of the present invention.

  A steel pipe column 1 shown in FIG. 1 has a substantially cylindrical shape whose diameter is somewhat reduced toward the upper part when standing, and two outer peripheral openings 103 (first openings) are formed in an outer peripheral portion 101 thereof. Part) and 104 (second opening). These openings may be ground holes or openings formed by excavating scaffold bolts provided in the steel pipe column 1, but if these parts do not exist at appropriate locations, The opening may be formed by a core drill or the like.

  The positions where the openings 103 and 104 are formed are such that the openings 104 are provided on the side surface of the steel pipe column 1 of about 1000 mm to 1200 mm from the ground, and a plurality of rod-shaped members as reinforcing materials are inserted on the side surfaces of 200 mm to 300 mm above the opening 104. An opening 103 is provided. The opening 103 has a substantially elliptical shape with a length of about 250 mm to 300 mm and a width of about 20 mm to 50 mm, while the opening 104 has a substantially elliptical shape with a length of about 40 mm to 200 mm and a width of about 20 mm to 50 mm. The

  By the way, since the steel pipe column 1 shown in FIG. 1 shows a state after construction of a reinforcing method to be described later, the openings 103 and 104 are actually filled with concrete or fitted with an appropriate cover. Although it is assumed that it is closed, the positions of the two openings are clearly shown here for the purpose of showing the configuration.

  In the hollow portion 102 of the steel pipe column 1, a rod-like member is inserted in which the aramid rod 51 and the deformed reinforcing bar 53 are connected via a connecting member 55 made of a material such as aluminum. The gaps between the inner wall surfaces are filled with gap fillers 61 and 63 that are sequentially injected. The gap filling material 61 is either sand, mortar, or bean gravel, and the gap filling material 63 is any of non-shrink mortar that does not shrink even after solidification, resin such as epoxy, or concrete. The injection amount of the gap filler 61 is an amount capable of filling the gap from the lower end portion to the connecting member 55. Further, the amount of the gap filler 63 injected is up to the vicinity of the opening 104 above the gap filler 61.

  The length of the aramid rod 51 itself is about 1800 mm to 3000 mm (more preferably 2800 mm), and is appropriately adjusted depending on the conditions of the portion to be reinforced.

The deformed reinforcing bar 53 is adjusted to a length that reaches the lowermost portion of the hollow portion 102 when connected to the aramid rod 51, and the length is about 700 mm to 900 mm, more preferably about 800 mm. The diameters of the aramid rod 51 and the deformed reinforcing bar 53 are the same and are about 15 mm to 25 mm, more preferably about 15 mm to 20 mm.

  When the rod-shaped member having the above configuration is inserted into the hollow portion 102, the deformed reinforcing bar 53 connected to the lower portion of the aramid rod 51 has an effect of stabilizing the entire rod-shaped member by its weight, and the gap filler 61 and This has the effect of preventing the rod-shaped member itself from floating in the hollow portion 102 by buoyancy after injecting 63.

  Further, the total length of the rod-shaped member having such a configuration, which includes the aramid rod 51 and the deformed reinforcing bar 53, reaches about 2500 mm to 3800 mm (more preferably 3600 mm), and therefore, the rod-shaped member is transported to the standing position of the steel pipe column 1. Even when it is not easy, it is possible to divide and carry both, and to connect them using the connecting member 55 at the time of actually performing the reinforcement work.

  As described above, the stainless steel wire 5 is fastened to the aramid rod 51. The diameter of the wire 5 is about 1 mm to 3 mm, more preferably about 1.5 mm. For example, as shown in FIG. 1, the wire 5 can be fastened by attaching a wire fastening portion 57 made of aluminum or iron having a through hole to the upper part of the aramid rod 51 and passing the wire 5 through the through hole. .

  Next, referring to the flowchart of FIG. 2 and each of FIGS. 3 to 9, the reinforcing material arranging method of the steel pipe pillar 1 according to the first embodiment of the present invention and the steel pipe pillar based on this reinforcing material arranging method. A method of reinforcing the above will be described.

  First, the side surface of the steel pipe column 1 is drilled using a core drill or the like to form two openings 103 (first opening) and 104 (second opening) (step S11).

  Next, a plurality of bar-shaped members (reinforcing bar-shaped members) composed of a plurality of aramid rods 51 connected to the deformed reinforcing bar 53 via the connecting member 55 are inserted from the opening 103 (step S12). The number of rod-shaped members to be inserted here is determined according to the diameter of the steel pipe column 1.

  The rod-shaped members inserted in step S12 are evenly arranged using the reinforcing material hanging jig (step S13). In the present embodiment, “equally arranged” means the distance between adjacent rod-shaped members (intervals of the shaft centers) among the rod-shaped members through which the respective shaft centers pass on the same circle oriented in the horizontal direction. Means that they are all equal.

  FIGS. 3 and 4 show a reinforcing material suspension used for suspending these rod-shaped members when the eight rod-shaped members are inserted in step S12 and fixing the positions inside the hollow portion 102. FIG. It is a top view which shows the jig | tool 10 and 20, respectively. In the present embodiment, after this, four more on the inner side (a region where the distance from the axis of the central axis 102 that is the central axis in the vertical direction of the hollow portion 102 is relatively close is defined as “inner side”). Since it is assumed that a rod-shaped member is inserted, hereinafter, the reinforcing material suspension jigs 10 and 20 will be referred to as outer placement jigs 10 and 20, respectively.

  Incidentally, in this embodiment, since it is assumed to be applied to 750 kg pillars and 1000 kg pillars with large diameters, the outer placement jigs 10 and 20 suspend a total of eight rod-shaped members. This is just an example, and other numbers are inserted, for example, 5 (one of which is 3 and the other is 2), 6 (3 each), and so on. It goes without saying that the number of rod-shaped members is changed according to the diameter of the steel pipe column to be reinforced, and an outer arrangement jig corresponding to the number is applied.

  Here, the detailed configuration of the outer placement jigs 10 and 20 will be described. The outer placement jig 10 shown in FIG. 3 is made of a deformed reinforcing bar, and supports the wire 5 to fix the position of the reinforcing material in the hollow portion of the arc-shaped reinforcing material fixing portion 12 and the reinforcing material fixing portion. And a support portion 11 that supports the support 12.

  The reinforcing material fixing portion 12 has an opening surface (through hole) for suspending and supporting the wire 5 fastened to the upper end of the aramid rod 51, and when the wire 5 is tensioned by the tension applied from the outside of the steel pipe column 1 Further, a plurality of suspension portions 13 for fixing the positions of the respective rod-shaped members constituting the reinforcing material in the hollow portion 102 are provided by welding or the like so that the distances between the adjacent suspension portions are equal. . Although FIG. 3 shows a case where four suspension portions 13 are provided, this is merely an example, and the number of suspension portions 13 is appropriately changed depending on conditions such as the diameter of the steel pipe column as described above. It is. Moreover, in FIG. 3, although the opening surface of the suspension part 13 has comprised the circular shape, this is only an example to the last, For example, an ellipse or a square may be sufficient. Furthermore, it is also possible to increase the strength of the suspension part 13 itself by coating the inner surface of the suspension part 13 with a cemented carbide or the like by shrinkage.

  The support portion 11 can be easily inserted into the hollow portion 102 by making the through hole 14 for facilitating the application of external tension through the wire 5 exposed to the outside from the suspension portion 13 and the outer placement jig 10 freely operable. A jig operating portion 15 having a function of making the wire 5, a wire fixing portion 16 a, 16 b for fixing the wire 5 in a tensioned state using a fixing metal fitting or clip described later, and an inner side described later when the reinforcing material is fixed. Jig support parts 17a and 17b for placing the placement jig 30 on the upper side are provided. The number of jig support portions 17a and 17b does not need to be two as shown in FIG. 3, and three, four, five, It is also possible to provide a plurality of.

  By the way, the outer peripheral part 101 of the steel pipe column 1 is provided with a plurality of reinforcing bars oriented in the vertical direction as standing main bars for reinforcing concrete.

The embedding interval in the outer circumferential direction of the reinforcing bars depends on the weight and size of the steel pipe column 1 and the minimum value is about 25 mm. For this reason, the width in the horizontal direction (horizontal direction) of the openings 103 and 104 may be less than 25 mm. In this sense, the thickness of the through hole 14 according to the present embodiment is preferably about 20 mm to 24 mm, and particularly if it is about 20 mm, the outer placement jig 10 can be inserted into a steel pipe column of any size. Therefore, it is particularly preferable.

  The outer placement jig 20 shown in FIG. 4 is also made of a different type of reinforcing bar like the outer placement jig 10, and supports a wire 5 and a reinforcing material fixing portion 22 for fixing a plurality of rod-shaped members that are reinforcing materials, And a support portion 21 that supports the reinforcing material fixing portion 21.

  A plurality of suspension portions 23 having an opening surface through which the wire 5 passes are provided to the arc-shaped reinforcing material fixing portion 22. With respect to the point that the number of the suspension parts 23 does not necessarily have to be four as shown in FIG. 4 and the shape of the opening surface is not limited to a circle, the suspension part of the jig 10 for outer placement is described. 13 is the same. Moreover, the point which can improve intensity | strength using a cemented carbide for the opening inner surface of the suspension part 23 is the same as that of the suspension part 13. FIG. In addition, the through-hole 24, the jig operation part 25, and the wire fixing parts 26a and 26b have the same functions as the corresponding parts (the same last digit) in the outer placement jig 10 described above. Needless to say.

  When the outer placement jigs 10 and 20 shown in FIGS. 3 and 4 are used, a total of eight rod-like members are inserted, so that the suspension parts 13 and 23 are 45 adjacent to each other. Reinforcing material fixing portions 12 and 22 are provided by welding or the like at equal intervals so as to form an angle of degrees. The through holes 14 and 24 are provided with holes corresponding to the number of the suspension parts 13 and 23, that is, four holes here, and the wire 5 fastened to the wire fastening part 57 of each rod-like member is provided. By penetrating through different openings of the through holes, the wires 5 extending to the outside of the steel pipe column 1 can be prevented from being entangled with each other.

  The overall length of the two outer placement jigs 10 and 20 described above can be adjusted to the length of the support portions 11 and 21 to constitute a jig having an optimum length within the above range. it can. For example, the outer arrangement jig 10 is about 650 mm to 1020 mm, the outer arrangement jig 20 is about 850 mm to 1220 mm, and the sizes of the reinforcing material fixing portions 12 and 22 forming the arc shape are the steel pipe columns 1 to be reinforced. It is determined according to the diameter of the inner periphery of the hollow portion 102. For example, the lengths of the arc chords formed by the reinforcing member fixing portions 12 and 22 are both about 230 mm.

  When these two reinforcing material suspension jigs 10 and 20 are combined, eight rod-like members are formed in the hollow portion 102 as a whole, and the two reinforcing material suspension jigs are combined and adjacently suspended on the same circle. It is inserted into the hollow portion 102 through four suspension portions 13 and 23 that are equally provided so that the distances between the portions are equal.

  Next, a specific method for inserting the outer placement jigs 10 and 20 into the hollow portion 102 will be described.

  First, the outer placement jig 10 is inserted into the hollow portion 102. At this time, the support portion 11 is oriented in the horizontal direction so that the plane including the arc forming the reinforcing material fixing portion 12 is parallel to the vertical plane. Then, the reinforcing material fixing portion 12 is inserted from the opening 103, the directivity direction of the support portion 11 is fixed to be a rotating shaft, and the reinforcing material fixing portion 12 is rotated by 90 degrees. When the support portion 11 is pulled outside the steel pipe column 1 in this state, the reinforcing material fixing portion 12 comes into contact with the inner wall surface of the outer peripheral portion 101. Thereafter, positioning is performed by lowering the outer placement jig 10 as it is vertically downward until it comes into contact with the lower end of the opening 103, and is fixed to the steel pipe column 1.

  Thereafter, the outer placement jig 20 is inserted into the hollow portion 102. Also in this case, as in the case of the outer placement jig 10, the support portion 21 is reinforced so that the plane including the arc forming the reinforcing material fixing portion 22 is parallel to the vertical plane while being oriented in the horizontal direction. The material fixing portion 22 is inserted from the opening 103, and the reinforcing material fixing portion 22 is rotated by 90 degrees with the direction in which the support portion 21 is directed as the rotation axis. When the support portion 21 is pushed out into the hollow portion 102 in this state, the reinforcing material fixing portion 22 comes into contact with the inner wall surface of the outer peripheral portion 101 facing the opening portion 103 of the hollow portion 102. Then, the reinforcing material fixing portion 22 is lifted vertically upward while being in contact with the inner wall surface, and positioning is performed when the reinforcing material fixing portion 22 is in contact with the upper end of the opening 103 and is fixed to the steel pipe column 1.

  FIG. 7 shows that the wire 5 is pulled outward using the outer placement jigs 10 and 20 and then tensioned, and then each outer placement jig is fixed to the steel pipe column 1 to obtain a total of eight pieces. 3 is a partial cross-sectional view of a state where a rod-shaped member is disposed in a hollow portion 102 when viewed from the side surface of a steel pipe column 1. FIG.

  The wire 5 that has passed through the suspension portion 13 of the outer placement jig 10 passes through the through hole 14 and is then fixed by attaching a fixing bracket 72 to the wire fixing portions 16a and 16b. The fixing metal fitting 72 shown in FIG. 7 is a corresponding portion of the wire fixing portions 16a and 16b in a groove (formed to have the same diameter as the deformed reinforcing bar) provided on the surfaces of the metal fitting bodies connected by bolts and nuts. And fixing the position of the metal fitting body to the outer placement jig 10 and fixing the wire 5 by tightening the nut with respect to the bolt.

  More specifically, the wire 5 is sandwiched between a wing nut welded with a plain washer and a plain washer, and the wing nut and the flat washer located on the opposite side of the wing nut and the wire 5 are contacted. The fixing fixture 72 is fixed to the outer placement jig 10 (of the wire fixing portions 16a and 16b thereof) by fixing the jig fixing nut to the bolt by screwing and fixing the wire 5 itself. Fix to the bracket 72. Here, if the bolt end portion is formed in a substantially square shape, a groove in which the bolt end portion can be fitted is provided in the fixing bracket 72 body in advance, and the bolt end portion does not rotate with respect to the bracket body. preferable.

  In addition, a fixing bracket 71 for connecting and fixing the connecting member 201 and the outer placement jig 10 is attached to the fixing portion 18. In this case, the fixing metal fitting 71 is assumed to be a groove for fitting the corresponding portion of the outer placement jig 10 to the surfaces of the two metal fitting bodies that are screwed together with butterfly bolts. At the same time, a groove for fitting and fixing the connecting member 201 is provided separately, and the connecting member 201 can be fixed to the outer placement jig 10 by tightening the butterfly bolt. It is. The connecting member 201 is connected to a winding member 202 that winds the steel pipe column 1. Thereby, the winding member 202 supports the outer placement jig 10 via the connecting member 201. Therefore, the connecting member 201 and the winding member 202 are made of a material that can support the outer placement jig 10 made of a deformed reinforcing bar, such as iron.

  The jig support portions 17a and 17b have openings for penetrating the wires 5 extending from the hollow portion 102 to the outside through the through holes 14 (openings are formed in the vertical direction as with the through holes 14). The function of bundling the wires 5 is added (see also FIG. 9 for the shapes of the through holes 14 and the jig support portions 17a and 17b).

  The outer placement jig 20 is also fixed, but the outer placement jig 20 has the base end portion of the reinforcing material fixing portion 22 placed on the lower end of the opening 103 as in the outer placement jig 10 described above. However, while being connected and supported by the winding member 204 wound around the steel pipe column 1 via the connecting member 203 fixed to the outer placement jig 20 by the fixing metal fitting 71, The left and right protruding portions of the jig operation unit 25 are wound and supported by attaching both ends of a connecting member 205 for supporting and fixing the outer arrangement jig 20 from the upper part of the steel pipe column 1. Thus, the outer placement jig 20 is supported from both above and below.

  Subsequent to step S13 described above, a rod-shaped member to be disposed inside the hollow portion 102 of the rod-shaped member disposed in step S13 is inserted from the opening 103 (step S14).

  In the present embodiment, as a reinforcing material suspension jig to be arranged on the inner side (hereinafter referred to as an inner arrangement jig), a total of two sets of inner arrangement jigs capable of arranging two rod-shaped members are used. The four rod-shaped members are arranged as a part of the reinforcing material inside the hollow portion 102, that is, at a position closer to the axial center of the hollow portion 102 (step S15).

  FIG. 5 is a top view showing the configuration of the inner placement jig 30 that is inserted into the hollow portion 102 and fixed first in step S15. The inner arrangement jig 30 shown in the figure is substantially the same in configuration as the corresponding part of the outer arrangement jig 10 except for the portion inserted into the hollow portion 102 (corresponding portions are aligned with the last digit). The description of that portion is omitted. The portion inserted into the hollow portion 102 extends from the support portion 31 in the distal direction (upward in FIG. 5), and a position fixing portion 32 that contacts the inner surface of the hollow portion 102 to position the inner placement jig 30. Two suspension portions 33 that pass through the wire 5 fastened to the upper end of the rod-shaped member and suspend the rod-shaped member, and a reinforcing material support portion 39 that supports the rod-shaped member via the suspension portion 33. I have.

  FIG. 6 is a top view showing the configuration of the inner placement jig 40 to be inserted and fixed in the hollow portion 102 later in step S15. The configuration of the inner arrangement jig 40 shown in the figure is substantially the same as the corresponding part of the inner arrangement jig 30 except for the portion inserted into the hollow portion 102 (corresponding portions are aligned with the last digit). Listed). The portion inserted into the hollow portion 102 is in contact with the inner surface of the hollow portion 102 to position the inner placement jig 40, and the position fixing portion 42 when positioned in the hollow portion 102. A reinforcing material support portion 49 that is provided so as to be located inside and supports a plurality of rod-shaped members as reinforcing materials, and a wire 5 that is welded to the reinforcing material support portion 49 and fastened to the upper end of the rod-shaped member. Two suspension portions 43 that penetrate and suspend the rod-like member are provided.

  8 to 10 are views showing a state when the inner arrangement jigs 30 and 40 are inserted into the hollow portion 102 and fixed. Among these, the partial cross-sectional view of FIG. 8 shows a state when a plurality of rod-shaped members that are reinforcing members are fixed. After the state shown in the partial cross-sectional view of FIG. 7 (step S13), steps S14 and S15 are performed. The state inside the hollow part 102 at the time of performing is shown. As shown in the figure, the two inserted inner placement jigs 30 and 40 and the outer placement jig 10 inserted in step S13 are connected to each other using a fixing metal fitting 73. The fixing metal fitting 73 may be anything as long as the support parts 11, 21, and 31 are connected to each other and fastened. Incidentally, FIG. 8 shows a case in which a fixing fitting 73 having a configuration in which a groove for fitting the upper and lower adjacent support portions is provided and a screw is tightened between the grooves is used.

  FIG. 9 is a perspective view focusing on only the arrangement of the four reinforcing material hanging jigs, and FIG. 10 shows the four reinforcing material hanging jigs when viewed from the upper surface of the steel pipe column 1. It is a top view which shows arrangement | positioning. Referring to these drawings, (1) the rod-like member suspended by the inner arrangement jigs 30 and 40 is more than the rod-like member suspended by the outer arrangement jigs 10 and 20. It can be seen that the hollow portion 102 is disposed at a position close to the vertical axis, that is, inside.

  Further, the eight rod-like members arranged by the outer arrangement jigs 10 and 20 and the four rod-like members arranged by the inner arrangement jigs 30 and 40 are arranged evenly in the hollow portion 102. It becomes clear that it has been.

  As described above, after step S15 described in detail, the gap filler 61 is injected into the hollow portion 102 from the opening 104 (step S16).

  Subsequently, the gap filler 63 is injected from the opening 104 until reaching the vicinity of the uppermost portion of the aramid rod 51 (step S17).

  Thereafter, when the gap filler 63 is solidified to some extent, the jigs 10 and 20 are extracted to the outside of the steel pipe column 1 (step S18). At this time, the entire jig is extracted to the outside by performing an operation in the reverse procedure to the operation for inserting the jigs 10 and 20. Thereafter, the wire 5 exposed to the outside is cut, and the remaining portion is inserted into the hollow portion 102. In view of the fact that the gap filler 63 has a certain degree of viscosity, it is possible to perform this step S18 immediately after step S17. Further, when the gap filler 63 is filled to the vicinity of the opening 104, the filling is temporarily stopped, the two outer placement jigs 10 and 20 are taken out of the steel pipe column 1, and the gap filler 63 is filled from the opening 103. Then, the rod-shaped member may be completely buried in the gap filler 63.

  Finally, the two openings 103 and 104 are closed by using concrete or the like (step S19). When a ground hole is used as the opening, a ground hole cover may be attached instead of closing with concrete. Further, an aramid fiber sheet may be wound around the opening.

  Through the above steps, the reinforcement work is completed, and the steel pipe column 1 shown in FIG. 1 is configured.

  Further, when excavation near the ground is impossible, it is also possible to wind the aramid fiber sheet only on the outer periphery from the exposed ground surface to the two openings. By adding such external reinforcement, the strength of the utility pole can be further recovered.

  According to the first embodiment of the present invention described above, excavation from the ground and the surrounding restoration work are unnecessary, so the construction period is short and can be easily constructed regardless of the standing position of the steel pipe column, The construction cost can be reduced.

  In this sense, the present embodiment is used for excavation work such as a place close to a house or the like, or a place having a slope reinforced by blocks or the like (see FIG. 1) to prevent a road from collapsing. This is particularly effective when reinforcing utility poles installed in places where construction is extremely difficult.

  In addition, according to the present embodiment, by attaching the deformed reinforcing bar to the lower end portion of the aramid rod, it is possible to prevent the rod-shaped member from floating after the gap filler is injected and to further increase the reinforcing strength.

  In addition, according to the present embodiment, by providing a reinforcing material suspension jig for suspending and arranging the rod-shaped member, even a rod-shaped member having a deformed reinforcing bar attached and having a large weight can be stably fixed. be able to. Furthermore, by using the reinforcing material suspension jig, the reinforcing material can be evenly arranged in the hollow portion, and unevenness in the reinforcing strength can be prevented.

  The reinforcement method according to the present embodiment can also be applied when reinforcing near the middle part in response to secular change due to the influence of a transformer installed on the upper part of the utility pole or a cable (electric wire) attached to the utility pole. Of course.

  By the way, various design modifications can be made to the reinforcing material suspension jig according to the present embodiment.

  For example, it is also possible to include a suspension part of each reinforcing material suspension jig and to detachably attach a part (tip part) up to the front reaching the through hole from the support part. In this case, for example, the distal end portion is inserted into the connecting portion provided in the support portion, and the distal end portion fixing member is screwed into the through hole provided in the side surface of the connecting portion to fix the distal end portion inserted into the connecting portion. It is assumed that Thus, by making the front-end | tip part of the jig | tool for reinforcing material suspension detachable from a support part, the further compactification of the jig for reinforcing material suspension can be realized. For this reason, in addition to the convenience at the time of transportation to a construction site, it is more suitable for constructing a reinforcing work for a utility pole standing in a relatively narrow area.

(Second Embodiment)
The second embodiment of the present invention provides a reinforcing material arranging method and a reinforcing method in the case where the steel pipe column itself is erected in an inclined state.

  In the state where the steel pipe column is inclined as assumed in the present embodiment, when a plurality of rod-shaped members as reinforcing members (the configuration is the same as that of the first embodiment) is inserted into the hollow portion, it is vertical due to the influence of gravity. Since the direction is directed, even if the vicinity of the upper end of the rod-shaped member is evenly arranged using the reinforcing material suspension jig, it is unevenly distributed near the lower end, and the reinforcing effect may be reduced. In view of this, it is possible to evenly arrange a plurality of rod-like members as reinforcing materials even in the vicinity of the lower end of the hollow portion by using an intermediate arrangement jig that can be used as a set with the reinforcing material hanging jig.

  FIG. 11 is a flowchart showing a construction procedure of the steel pipe column reinforcing method according to the present embodiment.

  First, regarding the formation of the two openings 103 (first opening) and 104 (second opening) in step S21 and the insertion of the rod-shaped members (the number of outer placement jigs) in step S22, This is the same as steps S11 and S12 in the first embodiment. FIG. 12 is a partial cross-sectional view showing a state in which a reinforcing rod-like member (configured by connecting the aramid rod 51 and the deformed reinforcing bar 53 with the connecting member 55) is inserted into the inclined steel pipe column 1 in step S22. As shown in the figure, at this stage, the rod-shaped member is oriented vertically downward according to gravity, and therefore is unevenly distributed near the lower portion of the hollow portion 102.

  In the subsequent step S23, the intermediate arrangement jig 80 for eliminating the uneven distribution of the rod-like member is inserted into the hollow portion 102 and lowered to the vicinity of the connecting member 55.

  FIG. 13 is a partial cross-sectional view showing a situation in which the uneven arrangement of the rod-shaped member is eliminated by lowering the intermediate arrangement jig 80. FIG. 13 is a diagram for the main purpose to show that the uneven distribution in the vicinity of the lower portion of the hollow portion 102 has been eliminated. Therefore, the reinforcing material hanging jig is still in the vicinity of the opening portion 104 which is the upper portion of the hollow portion 102. In view of the fact that they are not inserted, they are not necessarily evenly arranged as shown in FIG. 13, but this is merely a convenient measure for simplifying the drawing.

  FIG. 14 is a perspective view showing a detailed configuration of the intermediate placement jig 80. This intermediate arrangement jig 80 has a U-shaped penetrating portion 81 through which a rod-like member can be inserted in the hollow portion 102 for positioning through the rod-like member on the outer periphery of a circular tube-shaped central portion 83. The number of rod-shaped members to be inserted is provided. The shape of the penetrating portion 81 may be circular instead of U-shaped. In any case, the angle in the horizontal direction is 45 degrees in FIG. Note that FIG. 14 is merely an example, and other five insertions (the tips of the arrangement parts form an angle of 72 degrees in the same meaning as described above) and six insertions (the arrangement of each other) The tips of the portions form an angle of 60 degrees in the same meaning as described above), and there are also four insertions described later.

  By the way, the central portion 83 is provided with a hole portion 85 that can be suspended by using the wire 7 in order to insert the intermediate placement jig 80 into the hollow portion 102 and to remove it from the hollow portion 102. . FIG. 14 shows a case where there are three holes 85, but the number of holes 85 is not necessarily limited to three, and may be four or five.

  The center part 83 is made of iron, and the penetrating part 81 is made of iron or stainless steel. The central portion 83 and the penetration portion 81 are welded to form an intermediate placement jig 80 as a whole.

  Thereafter, the rod-like member is hung using the outer placement jigs 10 and 20, and the vicinity of the opening 103 is equally arranged as in the first embodiment.

  Subsequent to step S23 described above, step S24 inserts rod-like members arranged on the inside (again, four are inserted as in the first embodiment).

  The four rod-shaped members inserted in step S24 are also arranged in the lower portion in the hollow portion 102 using the intermediate placement jig 90 having four through portions, and the vicinity of the opening 103 is the first embodiment. In the same manner as described above, the inner arrangement jigs 30 and 40 are used to hang and fix the arrangement (step S25).

  FIG. 15 is a top view showing a situation seen from the top surface of the hollow portion 102 in order to schematically show the placement of the intermediate placement jigs 80 and 90 after step S25. As shown in the figure, intermediate placement jigs 90 are also provided around the cylindrical central portion 93 by the number of rod-like members into which the through portions 91 are inserted (here, four). The center portion 93 is provided with a hole (not shown) for fastening the suspension wire 7 as appropriate, as in the case of the intermediate placement jig 80 described above. When the intermediate placement jig 90 is actually inserted, the wire 7 that suspends the intermediate placement jig 80 that has been previously inserted is previously connected to the central portion 93 outside the steel pipe column 1. Leave it through.

  The initial insertion position in the hollow portion 102 of the intermediate placement jig 90 to be inserted in step S25 is such that the outer diameter including the through portion 91 of the intermediate placement jig 90 is the center of the intermediate placement jig 80. If it is smaller than the inner diameter of 83, the inside of the hollow portion 102 can be lowered until they are almost at the same position (FIG. 15 corresponds to this case). On the other hand, the outer diameter including the through-hole 91 of the intermediate placement jig 90 may be larger than the inner diameter of the central portion 83 of the intermediate placement jig 80. In such a case, since the intermediate placement jig 90 cannot be inserted into the central portion 83, the intermediate placement jig 90 to be inserted into the hollow portion 102 later is slightly higher than the intermediate placement jig 80. However, the effect is not particularly different from the former.

  Thereafter, the gap filler 61 is injected from the opening 104 into the hollow portion 102 (step S26).

  Subsequently, the gap filler 63 is injected from the opening 104 until it reaches the vicinity of the uppermost portion of the aramid rod 51 (step S27). In this step, the intermediate placement jigs 80 and 90 are gradually pulled in accordance with the injection amount of the gap filling material 63 so that the intermediate placement jigs 80 and 90 are not buried in the gap filling material 63. Will rise.

  Subsequent steps S28 and S29 are basically the same as steps S18 and S19 (see FIG. 2) of the reinforcing method in the first embodiment, respectively. At this time, the steel pipe column 1 is made by performing operations in the reverse order to the operations for inserting the reinforcing material suspension jigs 10, 20, 30, 40 and the intermediate placement jigs 80, 90, respectively. Extract outside.

  In view of the fact that the gap filling material 63 has a certain degree of viscosity, it is possible to perform this step S28 immediately after step S27. In the case where an earth hole is used as the opening, instead of closing with concrete. The point that an earth hole cover may be attached to and the point that an aramid fiber sheet may be wound around the opening after reinforcement in the hollow part is the same as in the first embodiment described above.

  Through the above steps, the reinforcement work is completed, and a steel pipe column that is inclined and standing is completed with the same basic configuration as that shown in FIG. Therefore, it is needless to say that the above-described second embodiment of the present invention has the same effect as the first embodiment.

  In addition, according to the present embodiment, even in the case of a steel pipe column standing at an incline, a plurality of rod-shaped members that form reinforcing materials using intermediate placement jigs in the lower part in the hollow part are not only the upper end. By arranging evenly in the vicinity of the lower end, it is possible to obtain the same reinforcing effect as that of a steel pipe column erected vertically.

It is sectional drawing showing the structure of the reinforced steel pipe pillar which concerns on embodiment of this invention. It is a flowchart figure showing the construction procedure of the reinforcement method of the steel pipe pillar which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the structure of the reinforcing material suspension jig | tool (for outside arrangement | positioning) of the steel pipe pillar which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the structure of the reinforcing material suspension jig | tool (for outside arrangement | positioning) of the steel pipe pillar which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the structure of the reinforcing material suspension jig | tool (for inner arrangement | positioning) of the steel pipe pillar which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the structure of the reinforcing material suspension jig | tool (for inner arrangement | positioning) of the steel pipe pillar which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the state at the time of two jig | tool for external arrangement | positioning insertion. It is explanatory drawing which shows the state at the time of all the jig | tool for hanging a reinforcement material insertion. It is a perspective view which shows the state at the time of all the jig | tool for hanging a reinforcement material insertion. It is a top view which shows the state at the time of all the jig | tool for hanging a reinforcement material insertion. It is a flowchart figure showing the construction procedure of the reinforcement method of the steel pipe pillar which concerns on the 2nd Embodiment of this invention. It is a fragmentary sectional view which shows the state which inserted the reinforcing material in the hollow part of the inclination steel pipe pillar. It is a fragmentary sectional view which shows the state which inserted the jig | tool for intermediate arrangement | positioning after inserting a reinforcing material in the hollow part of an inclined steel pipe pillar. It is a perspective view which shows the structure of the jig | tool for intermediate arrangement | positioning. It is a top view which shows a state when the jig | tool for intermediate arrangement | positioning is applied to all the reinforcing materials inserted in the hollow part of a steel pipe column.

Explanation of symbols

1 Steel pipe column 5, 7 Wire 10, 20 Reinforcing material suspension jig (outside arrangement jig)
12, 22 Reinforcement fixing part 13, 23, 33, 43 Suspension part 14, 24, 34, 44 Through hole 30, 40 Reinforcement material suspension jig (inner arrangement jig)
32, 42 Position fixing part 39, 49 Reinforcing material support part 51 Aramid rod 53 Atypical reinforcing bar 55 Connecting member 57 Wire fastening part 61, 63 Gap filling material 71, 72, 73 Fixing fitting 80, 90 Intermediate arrangement jig 81, 91 Through part 83, 93 Center part 101 Outer part 102 Hollow part 103, 104 Opening part

Claims (4)

A steel pipe column reinforcing method for reinforcing an existing steel pipe column,
The plurality of rod-shaped members are inserted into the hollow portion, and the shaft centers of the plurality of inserted rod-shaped members pass on the same circle with respect to the horizontal plane, and all the intervals between the axis centers of adjacent rod-shaped members are arranged equally. A first step;
A method for reinforcing a steel pipe column, comprising: a plurality of rod-shaped members inserted in the first step; and a second step of injecting a gap filler that fills a gap between the inner side surfaces of the hollow part. While inserting the plurality of rod-shaped members into the hollow portion from the first opening formed on the side surface of the steel pipe column,
The method for reinforcing a steel pipe column according to claim 1, wherein the gap filler is inserted into the hollow portion from a second opening formed at a lower portion of the first opening.   A reinforced steel pipe column reinforced by the steel pipe column reinforcement method according to any one of claims 1 and 2. In order to reinforce an existing steel pipe column, a plurality of rod-shaped members as reinforcement members inserted into the hollow portion of the steel pipe column are suspended via wires respectively fastened to the upper ends of the plurality of bar-shaped members. A steel pipe column reinforcing material suspension jig disposed in the hollow portion by
A position fixing portion having an arc shape capable of contacting the inner surface of the hollow portion of the steel pipe column;
The position fixing part is provided on a plane including the arc of the position fixing part closer to the vertical center axis of the hollow part than the position fixing part, and has an opening surface parallel to the plane, and at the upper end of the rod-shaped member. A steel pipe column reinforcing material suspension jig, comprising: a suspension portion that suspends the rod-shaped member by penetrating and supporting each of the wires to be fastened.

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