JP2006283392A - Reinforcing method for steel pipe column, and reinforced 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, and the reinforced steel pipe column. <P>SOLUTION: This reinforcing method comprises: a step of inserting a plurality of rod-shaped members into hollow parts from an upper terminal opening part of the steel pipe column; a step of inserting a reinforcing-material arranging implement, used for arranging the plurality of rod-shaped members inserted in the previous step, into a hollow part from the terminal opening part; a step of arranging the plurality of rod-shaped members as the reinforcing material in the hollow parts by using the reinforcing-material arranging implement inserted in the previous step; and a step of injecting a gap filling material, used for filling a gap between the inside surface of the hollow part and each of the plurality of rod-shaped members, into the hollow part from the terminal opening part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for reinforcing a steel pipe column when reinforcing an existing steel pipe column, and a reinforced steel pipe column.

  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 and a reinforced steel pipe column that have a short construction period and do not depend on the standing position of the steel pipe column. There is.

  In order to achieve the above object, the invention according to claim 1 is a method for reinforcing a steel pipe column in which a plurality of rod-shaped members as reinforcing materials for reinforcing the steel pipe column are arranged in a hollow portion of an existing steel pipe column, A step of inserting the plurality of rod-shaped members into the hollow portion from the end portion of the steel pipe column, and a reinforcing material arranging jig for arranging the plurality of rod-shaped members inserted in this step from the end portion. A step of inserting into the hollow portion, a step of arranging a plurality of rod-shaped members as reinforcing materials in the hollow portion using the reinforcing material arranging jig inserted in this step, an inner surface of the hollow portion and the plurality of rod-shaped members The gist is to perform at least a step of injecting a gap filler for filling a gap between members into the hollow portion from the end portion.

  According to a second aspect of the present invention, in the reinforcing material arranging jig, through portions that penetrate the plurality of rod-shaped members are provided in the number corresponding to the number of the plurality of rod-shaped members, and are perpendicular to a direction penetrating the plurality of rod-shaped members. The gist is to provide at least one position fixing portion that can be opened and closed with respect to the direction.

  According to a third aspect of the present invention, the position fixing portion includes a shaft rod having a predetermined diameter, a movable connecting portion that is slidably fitted to the shaft rod, and a fixed portion that is fixed to the shaft rod. A connecting portion, one end of which is hinged to the movable connecting portion, and a plurality of upper arm portions disposed symmetrically with respect to the axis of the shaft rod, and one end thereof is hinged to any of the plurality of upper arm portions. And having the other lower arm portion hinged to the fixed connecting portion and the plurality of penetrating portions connected to one of the upper arm portion and the lower arm portion connected to each other. The gist.

  The gist of the invention described in claim 4 is that the penetrating portion is pivotally or hinged so that the ends of two semi-annular members having substantially the same shape are rotatable with respect to each other. To do.

  The gist of the invention of claim 5 is that the shaft rod is provided with a stone bump at one end, and the other end of the shaft rod is provided with a connecting portion for connecting to another rod-like member.

  The gist of the invention described in claim 6 is that the rod-shaped member is formed by connecting or binding a rod-shaped member made of aramid fibers having substantially the same diameter and a deformed reinforcing bar.

  The gist of the invention described in claim 7 is that the existing steel pipe column is reinforced by the steel pipe column reinforcing method described in any one of claims 1 to 6.

  As is clear from the above description, according to the present invention, it is possible to provide a simple and inexpensive method for reinforcing a steel pipe column and a reinforced steel pipe column that have a short construction period and do not depend on the standing position of the steel pipe column. it can.

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

  FIG. 1 is a diagram showing a schematic configuration of a reinforced steel pipe column (reinforced steel pipe column) 100 when the reinforcing material arranging jig 1 is left in the hollow portion 102. First, the outline of the reinforcing method of the reinforced steel pipe column 100 shown in FIG. 1 will be described with reference to the flowchart of FIG. Below, the code | symbol 102 is provided to the hollow part of the steel pipe pillar 100, and is demonstrated.

  First, the cover 101 made of concrete or the like attached to the top of the steel pipe column 100 is removed (step S1).

  Thereafter, a plurality of rod-shaped members as reinforcing materials are inserted into the hollow portion 102 from the upper terminal mouth portion of the hollow portion 102 generated after the removal (step S2). The plurality of rod-like members inserted in Step 2 are aramid rods 51, which are rod-like members made of aramid fibers, are approximately the same diameter as this aramid rod 51, and are connected to each aramid rod 51 via a connecting member 55, It is comprised from the atypical rebar 53 which functions as a weight. When the hollow portion 102 is inserted, the deformed reinforcing bar 53 is positioned on the lower side.

  In the subsequent step S3, the reinforcing material arranging jig 1 is inserted from the upper terminal opening, and the inserted reinforcing material arranging jig 1 is used to uniformly arrange the rod-like members inserted in step S2.

  Details of the arrangement of the reinforcing material using the reinforcing material arranging jig 1 in step S3 will be described. The wires fastened to the upper part of the reinforcing material inserted in step S2 are passed through the respective through portions 138 and 238 shown in FIGS. 4 and 7, which will be described later, and the position fixing portions 13 and 23 are made perpendicular to the axis. In the closed state, it is lowered into the hollow portion 102 from the end portion.

  As described above, the processing after the reinforcing material is evenly arranged in the hollow portion 102 in step S <b> 3 described in detail differs depending on whether or not the reinforcing material arranging jig 1 is left in the hollow portion 102.

  First, the case where the reinforcing material arranging jig 1 is left in the hollow portion 102 (YES in step S4) will be described.

  In this case, the gap filler is injected from the end portion into the hollow portion 102 (step S5). Two types of gap fillers are assumed. First, either sand, mortar, or bean gravel (gap filler 63) is injected from the lower end of the hollow portion 102 until reaching the position of the connecting member 55, and thereafter Then, either non-shrink mortar, epoxy resin or concrete (gap filler 61) that does not shrink after solidification is poured until it reaches the vicinity of the top of the aramid rod 51.

  Thereafter, the jig operation bar-like member 9 exposed to the outside of the steel pipe column 100 is rotated, and the entire jig operation bar-like member connected to the upper part of the reinforcing material arrangement jig 1 is used for the reinforcement material arrangement. It leaves | separates from the jig | tool 1 and takes out to the exterior of the steel pipe pillar 100 (step S6). At the time of this step S6, since the gap fillers 61 and 63 are already filled around the reinforcing material, the reinforcing material arranging jig 1 also rotates with the rotation of the jig operating bar-shaped member 9. Absent.

  If the reinforcing material arranging jig 1 is left in the hollow portion 102 in this way, the reinforcing material arranging jig 1 itself also serves as a reinforcing material. Can be obtained. This method is particularly effective when the reinforcing material arranging jig 1 is mass-produced using plastic or the like.

  Next, the case where the reinforcing material arranging jig 1 is taken out without being left in the hollow portion 102 (NO in step S4) will be described.

  In this case, as a gap filler, a jig for reinforcing material placement is gradually added while filling the gap between the reinforcing material and the inner surface of the hollow portion 102 using either non-shrink mortar, resin such as epoxy, or concrete. By raising 1, the reinforcing material arranging jig 1 is pulled out of the steel pipe column 100 (step S <b> 7).

  At the time of extraction to the outside, the steel pipe column 100 is extracted to the outside by performing an operation in the reverse procedure to the operation for inserting the reinforcing material arranging jig 1. More specifically, a wire is fastened to each of the movable connecting portions 131 and 231 described later in FIG. 4, and these wires are exposed in advance to the upper end port portion of the steel pipe column 100, and a jig-operating rod-shaped member 9 is lifted to move the movable connecting portions 131 and 231 with respect to the shaft rods 11 and 21 by operating the wire, thereby closing the horizontal width of the movable connecting portions 131 and 231 small and moving upward. Thus, the reinforcing material arranging jig 1 can be taken out from the hollow portion 102 whose inner diameter gradually decreases. In this step, the point that the gap filler is injected until it reaches the upper end of the aramid rod 51 is the same as the case where the reinforcing material arranging jig 1 is left.

  The reinforcing method for taking out the reinforcing material arranging jig 1 in this way is effective when the reinforcing material arranging jig 1 is desired to be reused for each reinforcing work.

  The subsequent processing is the same regardless of whether or not the reinforcing material placement jig 1 is left, and after the gap filler is filled, the removed top cover 101 is attached to the end portion. The steel pipe column 100 is returned to the original state in appearance (step S8).

  The reinforcement of the steel pipe column 100 is completed by the above process.

  FIG. 3 is a perspective view showing a schematic configuration of a steel pipe column reinforcing material arranging jig according to an embodiment of the present invention. A jig 1 for reinforcing material arrangement shown in the figure is for uniformly arranging a plurality of rod-shaped members as reinforcing materials to be inserted into a hollow portion of a steel pipe column within the hollow portion. 20 is connected. In the description of the present embodiment, “equally arrange” means that the distance between adjacent rod-shaped members (axial centers) among the rod-shaped members whose axial centers pass on the same circle oriented in the horizontal direction. Means that the intervals are all equal. This point is common to all embodiments of the present invention.

  Of the two jigs constituting the reinforcing material arranging jig 1, the jig 10 positioned on the upper side when the hollow portion of the steel pipe column is inserted is provided as a plurality of reinforcing materials in the middle portion of the shaft rod 11 forming the central axis. The position fixing | fixed part 13 which penetrates this rod-shaped member and fixes the position of these several rod-shaped members within the hollow part of a steel pipe column is provided.

  FIG. 4 is a perspective view showing the configuration of the position fixing portion 13 in more detail, and FIG. 5 is a plan view in the direction of arrow A in FIG. The position fixing portion 13 shown in these drawings has a movable connecting portion 131 that is externally fitted so as to be slidable in the axial direction of the shaft rod 11 and a fixed connecting portion 132 that is fixed to the shaft rod 11. ing.

  Between the movable connecting portion 131 and the fixed connecting portion 132, four arm portions 13A are arranged symmetrically with the shaft rod 11 as an axis of symmetry, and one end of each arm portion 13A is connected to the movable connecting portion 131 and the other end. Is connected to the fixed connecting portion 132.

  Each arm portion 13 </ b> A has an upper arm 133 whose one end is hinged to the movable connecting portion 131, and one end screwed to the fixed connecting portion 132, while the other end is hinged to the end portion of the upper arm portion 133. Arm portion 134. The elbow part that hinges the upper arm part 133 and the lower arm part 134 is a flat surface that facilitates horizontal deployment of the position fixing part 13 by abutting against the inner surface of the outer peripheral part made of concrete when the hollow part is inserted. A washer (plane washer) 135 is inserted.

  In addition, one penetrating portion 138 for penetrating the rod-like member is connected to each arm portion 13A. The penetrating part 138 is hinged using a hinge or the like so that the ends of two semi-annular members 138a and 138b having the same diameter can be rotated with respect to each other, or the ends are formed in a convex shape. It is composed by pivoting. The semi-annular member 138a is provided with a connecting portion 139 projecting from a hole 136 provided in the upper arm 133 and the lower arm 134. The connecting portion 139 can be integrally formed by welding or the like to the semi-annular member 138a.

  The connecting portion 139 is threaded so as to be inserted into the hole 136 and fastened with the nut 141, and has a function as a bolt. The penetrating portion 138 connected to the arm portion 17A using the nut 141 is rotatable about the connecting portion 139 oriented in a direction substantially perpendicular to a plane passing through the arm portion 17A. Note that the connecting portion 139 may be connected to the arm portion 17A by, for example, pinning the connecting portion 139 in addition to screwing.

  As shown in FIG. 4, in this embodiment, the connection position of the penetrating portion 138 to the arm portion 13A is alternately changed between the adjacent arm portions 13A. That is, when the penetrating portion 138 is connected to the upper arm portion 133 in a certain arm portion 13A, the arm portion 13A (two in the case shown in FIG. 4) adjacent to the arm portion 13A has a penetrating portion in the lower arm portion 134. 138 are connected. In this way, when the movable connecting part 131 is moved to the opposite side of the fixed connecting part 132 and the elbow part is extended, the position fixing part 13 is closed with respect to the direction perpendicular to the axis of the shaft 11. The diameter in the direction perpendicular to the shaft 11 can be further reduced.

  When the shaft 11 is oriented in the vertical direction and the movable connecting portion 131 is positioned above the fixed connecting portion 132 in the vertical direction (the positional relationship shown in FIG. 4 is nothing else), the weight of the position fixing portion 13 The movable connecting portion 131 slides vertically downward with respect to the shaft 11. Therefore, a stopper 137 is provided at an intermediate portion between the movable connecting portion 131 and the fixed connecting portion 132 of the shaft 11 in order to prevent the movable connecting portion 131 from moving further toward the fixed connecting portion 132. ing. The position of the stopper 137 is preferably adjusted so that the reinforcing member penetrating each through portion 138 can be evenly arranged at a position where the movable connecting portion 131 comes into contact with the stopper 137 and stops.

  Next, the structure of the both ends of the jig 10 will be described. As shown in FIG. 3, the jig 10 is connected to a jig operation rod-like member 7 that performs operations such as adjustment of the position of the entire reinforcing material arranging jig 1 via the connection member 4 at the upper end thereof. The lower end is connected to a jig 20 and a later-described jig. Therefore, a hole for inserting a bolt or a pin when the connecting member 4 is mounted and fixed is provided through the side surface near the upper end of the shaft 11. On the other hand, the lower end portion of the shaft rod 11 is provided with a jig connecting portion 15 in which a recess into which the upper end of the shaft rod 21 of the jig 20 can be mounted is formed by welding or the like. The jig connecting portion 15 is also provided with a hole on the side surface for inserting a bolt or a pin when the jig 20 is fixed.

  The connecting member 4 has a configuration that is detachable from the jig 10. More specifically, as shown in the side view of FIG. 6A, the end 41 is threaded to have a bolt-like configuration, while the lower end of the figure is a recess in which the upper end of the jig 10 can be mounted. Is formed. The upper end of the jig 10 is inserted into this concave portion, and both the holes penetrating the side surfaces are combined and pinned or fastened with bolts and nuts. Further, the end portion 41 is screwed into a concave portion formed in the jig connecting portion 71 of the jig operating rod-like member 7.

  On the other hand, as shown in the side view of FIG. 6 (b), the jig connecting portion 15 is welded to the shaft 11 and is fitted to the upper end of the jig 20 in the same manner as the connecting member 4. There is a recess (not shown) for holding and determining the position between the jigs. The method of fixing between the two jigs is by pinning or fastening with bolts and nuts as in the case of fixing with the connecting member 4 and the jig 10.

  The jig 10 having the above configuration can be opened and closed in a direction perpendicular to the axial direction of the shaft 11, and when inserted from the end of the upper end of the steel pipe column, the movable connecting portion 131 is opposite to the fixed connecting portion 132. When the position fixing part 13 is inserted in a closed state with respect to the direction perpendicular to the axis of the shaft rod 11 by moving the elbow part to the side and fixing the position of the reinforcing material inside the hollow part The elbow is bent and opened horizontally.

  Next, the jig 20 connected to the jig 10 described above via the jig connecting portion 15 will be described. A position fixing portion 23 having the same configuration as the position fixing portion 13 included in the jig 10 is provided in an intermediate portion of the shaft 21 of the jig 20. In the following description, the constituent elements of the position fixing unit 23 are given the same reference numerals where the last two digits are aligned with the corresponding constituent elements of the position fixing unit 13 and the hundreds place is 2. For example, reference numeral 231 is assigned to the movable connecting portion.

  As shown in FIGS. 3 and 6B, the diameter of the shaft rod 21 is the same as the diameter of the shaft rod 11, and a bolt or a pin is inserted into the side surface near one end of the shaft rod 21 after being inserted into the jig connecting portion 15. A hole that can be inserted is provided. Further, a stone bump 25 is provided on the other end of the shaft rod 21. In this embodiment, the jig 20 is inserted into the hollow portion of the steel pipe column so that the stone bump 25 becomes the lower end in the vertical direction, so that the stone bump 25 reaches the lowermost surface of the hollow portion of the steel pipe column and the reinforcing material is disposed. The entire jig 1 is supported.

  The position of the hole at the upper end of the jig 20 and the position of the hole of the jig connecting portion 15 of the jig 10 are all the rod-like shapes when the rod-shaped member penetrates the position fixing portion 23 and the position fixing portion 13 together. The members (four in the case of FIG. 3) are adjusted in advance so as to be oriented in a substantially vertical direction.

  The reinforcing material arranging jig 1 composed of the jigs 10 and 20 having the above configuration is formed using iron, an aluminum pipe, plastic or the like. Of these, mass production is possible at low cost by using aluminum pipes and plastics.

  Here, a preferable dimension example is described as the reinforcing material arranging jig 1.

  The diameter of the shaft rods 11 and 21 is about 9 mm to 10 mm.

  The penetrating portion 138 (and 238: hereinafter, all parentheses correspond in this paragraph) only need to be able to penetrate a rod-shaped member having a diameter of 15 mm to 25 mm, as will be described in detail below. In this sense, the diameter of the circle forming the cross-section of the semi-annular member is 4 mm to 6 mm, more preferably about 5 mm, and the through surface formed when the two semi-annular members pass on the same plane. The diameter of the circle may be about 25 mm to 30 mm, more preferably about 27 mm. By adopting such a configuration, in a state where the movable connecting portion 131 (and 231) is raised and the position fixing portion 13 (and 23) is closed, the shaft 11 (and the position fixing portion 13 (and 23) is closed. The width in the direction perpendicular to 21) is a value slightly smaller than 55 mm at the minimum. On the other hand, the width in the direction perpendicular to the shaft rod 11 (and 21) when the position fixing portion 13 (and 23) is opened is about 150 mm to 200 mm.

  When inserted into the hollow portion of the steel pipe column, the height difference (vertical “height” difference) between the stone thrust 25 and the fixed connection portion 232 is about 350 mm, and this fixed connection portion 232 and the flat washer 235 (upper arm portion 233). And the lower arm 234 are connected to each other at a height difference of about 100 mm. The height difference between the two position fixing portions 13 and 23 is about 1300 mm, and the height difference between the position fixing portion 13 and the upper end of the jig 10 is 0.60 to 0.70 m.

Therefore, the total length in the axial center direction of the shaft rods 11 and 21 of the reinforcing material arranging jig 1 is about 2.30 m to 2.50 m. Among these, the axial length of the shaft rod 11 of the jig 10 is about 0.65 m to 0.70 m, and the total length of the shaft rod 21 of the jig 20 is about 1.65 m to 1.80 m. is there.

  When the reinforcing material arranging jig 1 having the above-described dimensions is used, the length of the aramid rod 51 itself is 2600 mm to 3000 mm, more preferably about 2800 mm. The diameter of the aramid rod 51 is 15 mm to 25 mm, more preferably 15 mm to 20 mm, and even more preferably 15 mm to 17 mm. The length of the deformed reinforcing bar 53 connected to the aramid rod 51 is 150 mm to 300 mm, more preferably about 200 mm, and the total length of the aramid rod 51 and the deformed reinforcing bar 53 is about 2800 mm to 3300 mm (more preferably 3000 mm). To reach. The diameter of the deformed reinforcing bar 53 is substantially the same as that of the aramid rod 51.

  In order to suspend the aramid rod 51 from the outside of the steel pipe column 100, a stainless steel wire is fastened to the end of the aramid rod 51 on the side where the deformed reinforcing bar 53 is not connected. The diameter of the wire is 1 mm to 3 mm, more preferably about 1.5 mm. As an example, an aluminum or iron wire fastening portion 57 having a through hole is attached to the upper part of the aramid rod 51, and the wire is inserted into the through hole. By doing so, the aramid rod 51 can be fastened.

  In addition, the dimension described above is only a preferable example to the last, and it cannot be overemphasized that the jig | tool 1 for reinforcement material arrangement | positioning in this embodiment is not necessarily applicable only in the case of this dimension.

  By using the steel pipe column reinforcing material placement jig described above, it is easy to place the reinforcing material evenly in the existing steel tube column hollow part. This can be done regardless of location.

  FIG. 7 is a view showing a state in which the vicinity of the lower end portion of the reinforcing material arranging jig 1 (near the lower end portion of the jig 20) is inserted into the hollow portion 102 of the steel pipe column 100. In FIG. For the sake of simplicity, only the vicinity of the end portion is illustrated, and the rod-like member and wire already inserted in the hollow portion 102 are omitted.

  As shown in FIG. 7, the end portion of the steel pipe column 100 that is supposed to be reinforced has a diameter that can be inserted for the first time with the position fixing portions 13 and 23 closed. May have. For this reason, as long as the diameter of the position fixing parts 13 and 23 in the horizontal direction (the direction perpendicular to the axial center direction of the shaft rods 11 and 21) is smaller than 55 mm as described above, any steel pipe column can be used. This is preferable because it can be applied.

  By the way, since the steel pipe pillar 100 which reinforces in this embodiment has an overall length of about 8 m to 11 m, the reinforcing material is evenly arranged using the reinforcing material arrangement jig 1 having a total length of about 2.5 m at most. In this case, the reinforcing material arranging jig 1 must be operated from the upper end portion.

  In the present embodiment, as such an operation tool, a jig operating bar-like member 7 that can be connected to the upper end of the jig 20 and has substantially the same overall length as the overall length of the reinforcing material arranging jig 1, and A second jig operation bar 9 that can be connected to the upper end of the jig operation bar 7 is used.

  The jig operating rod-shaped member 7 has, at one end thereof, a jig connecting portion 71 provided with a recess that can be screwed with the end 41 of the connecting member 4 (see FIG. 6A), on the other hand, near the other end. A hole for inserting a bolt or a pin is provided on the side surface of this.

  The jig-operating rod-shaped member 9 is provided at one end thereof with a rod-shaped member connecting portion 91 having the same configuration as the jig connecting portion 15 of the jig 10 by welding or the like. Similar to the bar-shaped member 7, a hole for inserting a bolt or a pin is provided. The rod-like member connecting portion 91 can be mounted with an end on the side where the hole is provided on the side surface of the jig-operating rod-like member 7 or 9, and the jig has the end by pinning or fastening of a bolt and a nut. The operation bar 7 or 9 is connected.

  Therefore, as shown in FIG. 8, after connecting the upper end of the reinforcing material arranging jig 1 and the jig operating bar-shaped member 7 via the connecting member 4, the upper end of the jig operating bar-shaped member 7 and the jig are connected. If the rod-like member connecting portion 91 of the operation rod-like member 9 is connected, the total total length can be about 7.5 m, so that the reinforcing material is disposed in the hollow portion 102 with respect to the steel pipe column 100 of about 7 m. When the jig 1 is inserted, the reinforcing material arranging jig 1 can be arranged at a desired position by operating the upper end of the jig operating bar-like member 9 exposed in the vicinity of the end portion.

  The jig operating rod-like members 7 and 9 may be connected after the reinforcing material arranging jig 1 is lowered to some extent in the hollow portion 102, or the reinforcing material arranging jig 1 is connected to the hollow portion. It may be done before inserting into 102.

  Further, when the total length of the steel pipe column 100 is longer, it is only necessary to connect the jig operation rod-shaped member 9 upward as much as necessary. For this reason, it becomes possible to arrange | position a reinforcing material by isolate | separating and conveying separately to the construction site of reinforcement construction, and assembling at a construction site.

  Next, removal of the jig operation bar-like member 9 from the reinforcing material arranging jig 1 will be described. First, the jig operation bar-like member 9 exposed upward from the upper part of the steel pipe column 100 is rotated, and the entire jig operation bar-like member connected to the upper part from the reinforcing material arrangement jig 1 is arranged as a reinforcing material. Remove from the jig 1. Since the jig operation rod-shaped members 7 and 9 are connected in a state of being positioned with respect to each other, if the jig operation rod-shaped member 9 located at the uppermost position is rotated when the hollow portion 102 is inserted, the reinforcing material arranging jig is rotated. Up to the jig operating rod-like member 7 directly connected to the jig 10 of the tool 1 can be collectively separated from the reinforcing material arranging jig 1.

  At the time of removal (step 6 described above), since the gap fillers 61 and 63 are already filled around the reinforcing material, the reinforcing material is disposed as the jig operating rod-like members 7 and 9 rotate. Since the jig 1 does not rotate, it can be easily removed.

  FIG. 9 is a view showing a state near the lowermost surface of the hollow portion 102 after the rod-shaped member as the reinforcing material is arranged by using the reinforcing material arranging jig 1. As shown in the figure, after the arrangement of the reinforcing material is completed, the wire fastened to the upper part of the aramid rod 51 is suspended and fixed at the upper end of the steel pipe column 100. The wire fixing portion used at this time can be configured, for example, by attaching a wire fixing bracket to a winding member made of iron or the like that can be attached to the outer periphery of the steel pipe column 100.

  The wire fixing metal fitting fits and holds the corresponding part of the winding member in a groove (formed to have the same diameter as the deformed reinforcing bar) provided in the surfaces of the metal fitting main body connected to each other by the bolt and the nut. It is assumed that the bracket body is fixed to the winding member by fastening the wire to the bolt and the wire is fixed.

  When reinforcing a steel pipe column with a particularly short overall length, instead of connecting the aramid rod 51 and the deformed reinforcing bar 53 constituting the reinforcing member with the connecting member 55, the deformed reinforcing bar 53 is arranged side by side at the lower end of the aramid rod 51. Then, after both of them are bound using a binding member such as a tie wrap, this reinforcing material may be inserted into the hollow portion 102.

  In addition, when the vicinity of the ground is exposed, in addition to the above steps, a conventional reinforcement method in which the outer periphery of the steel pipe column 100 extending from the vicinity of the ground to the top of the reinforcing material is wound with an aramid fiber sheet. You may implement.

  The method for reinforcing a steel pipe column according to the present embodiment is particularly effective when applied to a single column (total length: 7 m to 11 m) having a relatively short overall length in the longitudinal direction. Of course, it is also possible to apply to the above. In that case, by connecting a larger number of second jig operating bar-like members 9, the reinforcing material arranging jig 1 is operated from the vicinity of the end portion so that the reinforcing material is evenly distributed in the hollow portion 102. What is necessary is just to arrange.

  Needless to say, the optimum number of reinforcing members to be inserted into the hollow portion 102 is selected according to the diameter of the steel pipe column 100, and the reinforcing material arranging jig 1 suitable for the number is used. In addition to four, three, five, six, etc. can be assumed as the number inserted.

  According to the embodiment of the present invention described above, since excavation from the ground and the surrounding restoration work are unnecessary, the construction period is short and the construction can be easily performed regardless of the standing place of the steel pipe column. Costs can be reduced.

  In this sense, the present embodiment is for excavation work such as a place close to a house or the like, or a place (see FIG. 7) having a ground reinforced with blocks or the like in order to prevent a landslide on the road. This is especially effective when reinforcing a utility pole installed in a place where it is extremely difficult to construct.

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

  In addition, according to the present embodiment, it is possible to prevent the unevenness in the reinforcing strength of the steel pipe column by arranging the reinforcing material evenly in the hollow portion.

  Furthermore, according to the present embodiment, even in the case of a steel pipe column that stands upright, an effect similar to that of a steel pipe column that stands up in the vertical direction can be obtained.

  By the way, various design modifications can be performed on the reinforcing material arranging jig according to the present embodiment.

(1) FIG. 10 is a diagram showing another configuration of the position fixing unit used in the present invention. The position fixing part 33 shown in the figure has an annular penetrating part 338. All of the penetrating portions 338 are connected to the upper arm portion 333 and have a configuration that can rotate about the connecting portion 339 as an axis.

  Similar to the above-described embodiment, such a penetrating portion 338 is alternately connected to the upper arm portion 333 and the lower arm portion 334 by the adjacent arm portions 33A, thereby further reducing the width in the direction perpendicular to the shaft 31. It is also possible to do.

(2) In the above-described embodiment, the two jigs 10 and 20 are connected to constitute the reinforcing material arranging jig 1. For example, the jig 20 arranged on the lower side is used alone. It is also possible to arrange a reinforcing material. In this case, the connecting member 4 is mounted on the upper end of the jig 20, and the jig connecting portion 71 of the jig operating rod-like member 7 is screwed to the end 41 of the connecting member 4. It is the same as that of the said one Embodiment that the rod-shaped member 9 for jig operation is further connected to the upper part according to the full length of a steel pipe column, and it inserts in a hollow part.

  As described above, the present invention can include various embodiments and the like that have the same effects as the above-described one embodiment.

It is a figure showing a schematic structure of a reinforced steel pipe pillar concerning one embodiment of the present invention. It is a flowchart figure which shows the outline | summary of the reinforcement method of the steel pipe pillar which concerns on one Embodiment of this invention. It is a perspective view showing a schematic structure of a steel pipe pillar reinforcing material arrangement jig concerning one embodiment of the present invention. It is an expansion perspective view showing the composition of the reinforcing material arrangement jig principal part (position fixing part) of the steel pipe pillar concerning one embodiment of the present invention. It is a top view of the arrow A direction of FIG. It is a side view which shows the connection part between jig | tools and a jig | tool and the jig | tool operation rod-shaped member, respectively. It is a figure which shows a mode when the jig | tool for reinforcement material arrangement | positioning is inserted from the top of a steel pipe column. It is a figure which shows the connection of the rod member for jig | tool operation to the jig | tool for reinforcement material arrangement | positioning which concerns on one Embodiment of this invention. It is a figure which shows the state of the hollow part lower end vicinity of the steel pipe pillar when a reinforcing material is arrange | positioned using the jig | tool for reinforcing material arrangement | positioning. It is an expansion perspective view which shows the structure of another jig | tool main part (position fixing part) for reinforcement material arrangement | positioning.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reinforcing material arrangement | positioning jig | tool 4 Connection member 7,9 Jig | stick operation rod-shaped member 10,20 Jig 11,21,31 Axle rod 13,23,33 Position fixing | fixed part 15,71 Jig connection part 25 Stone thrust 41 End 51 Aramid rod 53 Deformed bar 55 Connecting member 57 Wire fastening part 61, 63 Gap filling material 91 Bar-shaped member connecting part 100 Steel pipe column 101 Cover 102 Hollow part 131, 231, 331 Movable connecting part 132, 232, 332 Fixed connecting part 133, 233, 333 Upper arm part 134, 234, 334 Lower arm part 135, 235, 335 Plain washer 136, 236, 336 Hole part 137, 237, 337 Stopper 138a, 138b, 238a, 238b Semi-annular member 138, 238 338 Penetrating part 139, 239, 339 Connecting part

Claims (7)

A steel pipe column reinforcing method in which a plurality of rod-shaped members as reinforcing materials for reinforcing the steel pipe column are arranged in a hollow portion of an existing steel pipe column,
Inserting the plurality of rod-shaped members into the hollow portion from the upper end portion of the steel pipe column; and
Inserting a reinforcing material placement jig for placing the plurality of rod-like members inserted in this step from the end portion into the hollow portion;
A step of arranging a plurality of rod-shaped members as reinforcing materials in the hollow portion using the reinforcing material arranging jig inserted in this step;
A step of injecting a gap filler for filling gaps between the inner surface of the hollow part and the plurality of rod-like members from the end part into the hollow part. The reinforcing material arranging jig is:
There are provided as many penetrating parts that penetrate the plurality of rod-shaped members as the number of the plurality of rod-shaped members, and at least one position fixing part that can be opened and closed with respect to a direction perpendicular to the direction penetrating the plurality of rod-shaped members. The method for reinforcing a steel pipe column according to claim 1. The position fixing part is
A shaft rod having a predetermined diameter;
A movable connecting portion slidably fitted on the shaft rod;
A fixed connecting portion fixed to the shaft rod;
A plurality of upper arm portions each having one end hinged to the movable connecting portion and arranged symmetrically with respect to the axis of the shaft;
A plurality of lower arm portions, one end of which is hinged to any of the plurality of upper arms, and the other end of which is hinged to the fixed connecting portion;
The steel pipe column reinforcing method according to claim 2, further comprising: a plurality of the through portions connected to either one of the upper arm portion and the lower arm portion that are connected to each other.   4. The steel pipe column according to claim 3, wherein the penetrating part is pivotally or hinged so that ends of two semi-annular members having substantially the same shape are rotatable with respect to each other. Reinforcement method.   5. The steel pipe column according to claim 3 or 4, wherein a stone bump is provided at one end of the shaft rod, and a connecting portion for connecting with another rod-like member is provided at the other end of the shaft rod. Reinforcement method.   6. The method of reinforcing a steel pipe column according to claim 1, wherein the rod-shaped member is formed by connecting or binding a rod-shaped member made of aramid fibers having substantially the same diameter and a deformed reinforcing bar.   A reinforced steel pipe column reinforced by the steel pipe column reinforcement method according to any one of claims 1 to 6.

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