JP4342382B2 - Reinforcing method for concrete utility poles - Google Patents

Description

  The present invention relates to a method for reinforcing a concrete power pole for reinforcing a concrete power pole and a concrete power pole.

  The concrete utility pole 1 is erected, for example, with the lower base end portion buried in the ground. As shown in the cross section of FIG. 24 (a), such a utility pole 1 is only surrounded by an outer periphery composed of reinforcing bars 16 and concrete 17, and the inside is a hollow, A hollow portion 15 is formed. Further, as shown in FIG. 24B, a lid L, that is, a terminal lid, is attached to the top portion 13 which is the uppermost end portion of the utility pole 1 so that rain or the like does not enter the hollow portion 15 of the utility pole 1. Yes.

  Since the concrete utility pole 1 having a hollow inside as described above is deteriorated due to aging or the like, the strength of the concrete utility pole 1 is weakened. Therefore, the concrete utility pole 1 is reinforced. ing.

In order to reinforce the utility pole 1 with emphasis on the lower end part embedded in the ground and the portion close to the ground extending from the ground, a side surface of, for example, 1.05 m above the ground of the power pole 1 is provided. A plurality of rods as reinforcing materials are inserted into the inside of the utility pole 1 from the side openings such as the ground holes formed in, and then, for example, pea gravel and crushed stone are put into the gaps of the plurality of rods, and mortar and concrete are sequentially added. Thus, the reinforcement from the lowest end of the utility pole 1 to the vicinity of the side opening is emphasized.
Japanese Patent Application No. 2003-24176

  As described above, in the conventional method for reinforcing a utility pole made of concrete, the ground pole is mainly reinforced from the lowermost end of the utility pole 1 to the vicinity of the portion where the ground hole close to the ground is formed. There is a problem that the upper part remains hollow, and the upper part also has a problem that the strength is reduced due to deterioration, and the reinforcement of the entire concrete electric pole including this part is also desired. In particular, the utility pole has a total length of about 16 m, and it is highly necessary to quickly and surely reinforce the utility pole, which is said to be a suspended pole whose inside is narrowed upward.

  The present invention has been made in view of the above, and an object of the present invention is to provide a concrete electric pole reinforcing method for reliably and efficiently reinforcing the entire concrete electric pole, and concrete reinforced by this reinforcing method. It is to provide a telephone pole made of steel.

  In order to solve the above-mentioned problems, the reinforcing method according to claim 1 includes a step of forming a side opening on the side surface of a standing hollow concrete electric pole, and a range below the side opening is reinforced from the inside. A lower reinforcing step, an upper reinforcing step for reinforcing a range above the side opening from the inside, and the upper reinforcing step includes a rod insertion step for inserting a plurality of rods from the side opening, A jig insertion step of inserting a rod arrangement jig provided with a rod arrangement mechanism having a plurality of through portions through which a plurality of rods penetrates from the top opening of the utility pole; and the plurality of rods of the plurality of rods A rod penetrating step for dispersing and penetrating through the penetrating portion, a step for closing the side surface opening portion, and a reinforcing agent feeding step for feeding a reinforcing agent from the top opening portion are provided.

  According to the reinforcing method of claim 1, the upper reinforcing step includes a rod insertion step of inserting a plurality of rods from the side opening, a jig insertion step of inserting a rod placement jig from the top opening of the utility pole, The side opening is provided with a rod penetrating step for dispersing and penetrating a plurality of rods into a plurality of penetrating portions, a step for closing the side opening, and a reinforcing agent feeding step for feeding the reinforcing agent from the top opening. Since the upper range is reinforced from the inside, the entire concrete utility pole can be reliably and efficiently reinforced.

  The reinforcing method according to claim 2 is the reinforcing method according to claim 1, wherein, in the rod insertion step, a rope is lowered from the top opening to the inside, and the rope and a string connected to the rod are connected. The string is pulled out via the rope, and the string is held at the top with the rod suspended.

  In the reinforcing method according to claim 2, the rope is lowered from the top opening to the inside, the rope and the string connected to the rod are connected, the string is pulled out via the rope, and the string is suspended while the rod is suspended. The rod is inserted by holding it with.

  The reinforcing method according to claim 3 is the reinforcing method according to claim 2, wherein, in the jig insertion step, the string held at the top is removed, the string is passed through the through-hole, and the rod placement jig is attached. In the rod penetrating step, the rod is penetrated through the penetrating portion by the guide by the string.

  In the reinforcing method according to claim 3, in the jig insertion step, the string held at the top is removed, the string is passed through the penetration part, and the rod placement jig is inserted. In the rod penetration process, the rod is guided by the string. The rod is penetrated by penetrating the penetration portion.

  The reinforcing method according to claim 4 is the reinforcing method according to any one of claims 1 to 3, wherein the rod arrangement jig is provided with the rod arrangement mechanism in a rod-shaped portion, and the rod arrangement mechanism is formed into the rod shape. A movable connecting portion slidably attached to the portion, a fixed connecting portion fixedly attached to the rod-like portion, and one end pivotally attached to the movable connecting portion, from the rod-like portion around the rod-like portion A plurality of upper arm portions that are radially and equally attached in the circumferential direction, one end is rotatably connected to the other end of each of the plurality of upper arm portions, and the other end is rotatably attached to the fixed connecting portion. It has a plurality of lower arm parts, and has the penetration part in any one of the upper arm part and the lower arm part connected so that rotation is possible.

  According to a fourth aspect of the present invention, the rod arrangement jig includes a rod arrangement mechanism in the rod-like portion, and the rod arrangement mechanism is fixed to the rod-like portion and a movable connecting portion that is slidably attached to the rod-like portion. A fixed connecting portion attached to the movable connecting portion, one end rotatably attached to the movable connecting portion, a plurality of upper arm portions attached radially and circumferentially from the rod-like portion around the rod-like portion, and a plurality of one ends A plurality of lower arm portions rotatably connected to the other ends of the upper arm portions, and the other end rotatably attached to the fixed connection portion; It has a feature that a penetrating portion is provided in either one of the arm portions.

  The reinforcing method according to claim 5 is the reinforcing method according to claim 4, wherein the movable connecting portion and the fixed connecting portion are separated when the rod arrangement mechanism passes through the top opening in the jig inserting step. It is characterized by.

  According to the reinforcing method of claim 5, when the rod placement mechanism passes through the top opening in the jig insertion step, the movable connection portion and the fixed connection portion are separated from each other, thereby the rod placement jig. Can easily pass through the top opening, and therefore the rod placement jig can be easily inserted.

  The reinforcing method according to claim 6 is the reinforcing method according to any one of claims 1 to 5, wherein a rod having a string guide in which a string is connected in advance to the rod placement jig and the rod is guided by the string is a top part. It is inserted from the opening and guided to the rod placement jig by guidance by the string guide.

  According to the reinforcing method of claim 6, a string is connected in advance to the rod arrangement jig, and a rod provided with a string guide for guiding the rod with the string is inserted from the top opening, and the rod arrangement is performed by the guide by the string guide. The range above the rod placement jig can be reinforced by being guided by the jig.

  A reinforcing method according to a seventh aspect is characterized in that, in the reinforcing method according to any one of the first to sixth aspects, a steadying guide for stopping the rod placement jig from swinging is attached to the top.

  In the reinforcing method according to the seventh aspect, by attaching the steady guide to the top, it is possible to stop the swing of the rod placement jig by the steady guide.

  The reinforcement method according to claim 8 is the reinforcement method according to any one of claims 1 to 7, wherein a fall prevention net is attached to prevent the lid from falling when the lid attached to the top opening is removed. And

  According to the reinforcing method of the eighth aspect, by attaching the fall prevention net, the fall of the lid can be prevented by the fall prevention net.

  The reinforcing method according to claim 9 is the reinforcing method according to any one of claims 1 to 8, wherein the camera is suspended inside the electric pole and is inserted between the rod penetration step and the reinforcing agent charging step. And a step of imaging the inside.

  According to the reinforcing method of the ninth aspect, the inside can be confirmed by hanging the camera inside the utility pole and capturing the inside with the camera.

  The reinforcing method according to claim 10 is the reinforcing method according to any one of claims 1 to 9, wherein in the lower reinforcing step, a plurality of rods each having a string connected thereto are inserted from the side opening portions. A string is distributed and passed through the penetrating portion of the rod placement assisting tool having a plurality of penetrating portions through which the plurality of rods are dispersed, and the rod placement assisting tool is inserted from the side opening, It is characterized in that a rod of a book is dispersed and penetrated through a plurality of penetration portions by a guide by a string, and a reinforcing agent is introduced from the side opening portion.

  According to the reinforcing method of claim 10, in the lower reinforcing step, a plurality of rods each having a string connected thereto are inserted from the side opening, and the plurality of rods are dispersed and penetrated. A string is distributed and passed through the penetrating part of the rod arrangement assisting tool having the penetrating part, the rod arranging assisting tool is inserted from the side opening, and the plurality of rods are distributed to the plurality of penetrating parts by the guide by the string. By passing through and introducing a reinforcing agent from the side opening, the area below the side opening can be reinforced from the inside.

  The reinforcing method according to claim 11 is the reinforcing method according to claim 10, wherein the rod placement assisting tool used in the lower reinforcing step is provided with a plurality of U-shaped through portions equally in the circumferential direction outside the annular frame. It is characterized by that.

  In the reinforcing method according to the eleventh aspect, a rod placement auxiliary tool in which a plurality of U-shaped through portions are provided evenly in the circumferential direction outside the annular frame is used in the lower reinforcing step.

  A reinforcing method according to a twelfth aspect is characterized in that, in the reinforcing method according to any one of the first to eleventh aspects, a portion closing the side opening is reinforced with an aramid fiber sheet.

  In the reinforcing method of Claim 12, the part which closed the side surface opening part is reinforced with an aramid fiber sheet.

  According to the present invention, the upper reinforcing step includes inserting a plurality of rods from the side opening, inserting a rod placement jig from the top opening of the utility pole, and dispersing the plurality of rods to the plurality of through portions. By closing the side opening and letting the reinforcing agent through the top opening, the area above the side opening is reinforced from the inside, so the entire concrete utility pole is reinforced reliably and efficiently. be able to.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing a utility pole reinforced by a reinforcing method according to an embodiment of the present invention (referred to as the present reinforcing method), an inside thereof, and main reinforcing members. Referring to FIG. An outline of the method will be described.

  The utility pole 1 is a hollow concrete utility pole, and its total length is about 16 m. The utility pole 1 is said to be a co-axial pole whose inside is narrowed upward, and a portion from the lower end to about 2.6 m is buried and erected in the ground. Therefore, the remaining 13.4m portion appears on the ground. In this reinforcing method, the work on the top 13 of the utility pole 1 is performed by an operator disposed near the top 13 by an aerial work vehicle with a lifting device, for example. In addition, since this invention is not limited to the electric pole which the inside is narrow at the upper part, it is applicable also to the single pole of which the inside is the same width.

  In this reinforcing method, first, the side surface opening 11 is formed at a location near the ground surface on the side surface of the utility pole 1, and the area below the side surface opening 11 is reinforced from the inside (lower reinforcing step). In this lower reinforcement step, first, a plurality of aramid rods 21 of about 2.8 m are inserted from the side surface opening 11. A heavy bar 2a is attached to the lower end of the rod 21 and other rods described later for stabilization. Next, the crushed stone 3 (or bean gravel etc.) is thrown in as a reinforcing agent from the side surface opening 11, and the reinforcing agent 4 a is filled from the side surface opening 11.

  Next, the range above the side opening 11 is reinforced from the inside (upper reinforcing step). In this upper reinforcing step, first, a plurality of rods 22 each having a length of about 8.5 m are inserted from the side opening 11 and suspended by an aramid string 22a (rod insertion step). Next, a rod placement jig 5a provided with (for example, one) rod placement mechanism 51 having a plurality of through portions 511 is inserted from the top opening 12 of the utility pole 1, and a similar rod placement mechanism 51 (for example, 2) is inserted. The rod arrangement jig 5b provided is connected and inserted in the same manner (jig insertion process). These lengths are about 7.9m. The aramid string 23a is connected to the rod placement jig 5b, and further connected to the connecting rod 6a and the connecting rod 6b in sequence and inserted. Next, the plurality of rods 22 are dispersed and penetrated through the plurality of penetration portions 511 (rod penetration step). Next, the side opening 11 is closed and the connecting rods 6a and 6b are removed. Next, the reinforcing agent 4b is charged from the top opening 12 of the utility pole 1 (reinforcing agent charging step). Next, a rod 23 of about 5.1 m is embedded from the top opening 12 into the reinforcing agent 4b. At this time, the aramid string 23a is passed through the string guides 231 provided at three locations of the rod 23, and the rod 23 is guided to the rod placement jig 5b.

  Finally, the lid L such as the end cap that has been removed in advance is attached to the top portion 13 and the portion closing the side opening 11 is reinforced with the aramid fiber sheet 6 to complete the present reinforcing method.

  Thus, since the range above the side opening 11 is reinforced from the inside, the entire concrete utility pole can be reinforced reliably and efficiently.

  Next, the reinforcing method will be described in detail.

  2 to 4 are diagrams showing the utility pole 1 and its interior in each course of the reinforcing method, and FIG. 5 is a flowchart of the reinforcing method. In FIG. 2, the removal of the lid L at the top 13 is not shown, and a state without the lid L is shown.

  First, after making preparations such as aligning various members such as rods 21, 22, and 23, rod placement jigs 5a and 5b, and connecting rods 6a and 6b, which will be described later in detail (S11 in FIG. 5), the top 13 is swung. A stop guide G is attached (S13 in FIG. 5).

  The steady rest guide G is configured such that when a long member such as the rod placement jigs 5a and 5b and the connecting rods 6a and 6b connected thereto is inserted from the top opening 12, the upper end of the long member cannot be shaken. In addition to this, it is used for attaching a fall prevention net N described later. Moreover, the rod 22 can be suspended by connecting the aramid string 22a to the steady rest guide G.

  Specifically, as shown in FIG. 6A, the steady rest guide G has an annular portion G1 at the upper end portion, and a C-shaped arc having a notch portion G3 spaced in parallel from the annular portion G1. Two portions G2 are disposed, and the annular portion G1 and the two arc portions G2 are fixedly connected by four connecting rods G4. 6 (a) and 6 (b), the lid L is not shown on the top portion 13 of the utility pole 1, but at the stage of attaching the steady rest guide G as shown in FIG. Yes.

  As shown in FIG. 6B, the steady rest guide G configured as described above is fixedly attached to the top portion 13 of the utility pole 1 with, for example, a metal or nylon tape G5.

  After attaching the steady rest guide G to the top 13 of the utility pole 1, as shown in FIG. 6 (a), the fall prevention net N is attached to the top 13 of the utility pole 1 using this steady rest guide G. When the lid L of the utility pole 1 is removed, the broken concrete pieces and the like are prevented from falling downward.

  As shown in FIG. 7 (b), the fall prevention net N includes a rectangular net N1, a horizontal bar N2 made of, for example, metal that is attached to the upper side of the net N1, and a lower side from the horizontal bar N2. Of the five vertical bars N4 extending vertically to the half of the net portion N1, the string N3 attached to the intersection of the vertical bar N4 and the horizontal bar N2, and the five vertical bars N4 It is comprised from the string N5 attached to the vertical bar N4 located in the left end.

  In order to attach the fall prevention net N configured in this way to the top portion 13 of the utility pole 1 to which the steady rest guide G is attached as shown in FIG. 7A, first, while bending the horizontal bar N2 round, A cylindrical shape is formed so that the lower portion of the steady rest guide G and the top portion 13 of the utility pole 1 are surrounded by the portion N1, and the string N5 attached to the left vertical rod N4 in this cylindrical state is connected to another vertical rod N4. To complete the cylindrical shape.

  Then, the string N3 attached to the horizontal bar N2 at the upper end of the cylindrical shape is tied to the arc portion G2 of the steady rest guide G at an appropriate interval to fix the cylindrical shape. Then, the net N1 positioned at the lower end of the cylindrical shape is wound around the electric pole 1 so that the cylindrical shape is conical, and the lower end of the net N1 wound around the electric pole 1 is connected to the string N6. Then, the fall prevention net N is attached around the top portion 13 of the utility pole 1 as shown in FIG.

  After the steady rest guide G and the fall prevention net N are attached to the top 13 of the utility pole 1, as shown in FIG. 8, the lid L of the top 13 of the utility pole 1 is removed using a bar 101 and a metal hammer 103 (see FIG. 5). S15).

  In addition, since the lid | cover L uses the bolt 13a etc. for the top part 13 of the utility pole 1, and is fixed so that it may be covered with concrete, this bolt part hangs using the bar 101 and the hammer 103. In this way, the lid L is removed. Since the fall prevention net N becomes unnecessary after removing the lid L in this way, the fall prevention net N is removed from the top 13 of the utility pole 1 here.

  When the lid L of the utility pole 1 is removed and the top opening 12 of the utility pole 1 is exposed, next, the internal state of the utility pole 1 is confirmed from the top opening 12 (S17 in FIG. 5).

  As shown in FIG. 9 (a), for example, a rod-like or plate-like support member C3 is attached to the top portion 13 of the utility pole 1, and the tip of the support member C3 extends to almost the center of the cross section of the top opening portion 12 of the utility pole 1. The rotating member C4 having a groove formed on the outer peripheral surface such as a pulley is attached to the tip of the support member C3 extending to the center. A wire C5 is put on the groove of the rotating member C4, and a weight C7 is attached to a lower end portion of the wire C5 through a snap-in salcan C6 as shown in FIG.

  On the other hand, the upper end portion of the wire C5 is wound around a winder C8 such as a fishing reel attached to the end portion of the support member C3, and the wire C5 is rotated by rotating the winder C8 with a handle C9. The weight C7 at the lower end of the wire C5 can be hung down inside the electric pole 1 or pulled up by winding or unwinding the wire.

  As shown in FIG. 9 (a), a cylindrical camera C1 is attached to a portion near the lower end of the wire C5 that can be wound up or rewound by the winder C8. The camera cord C11 extending upward from the camera C1 is fixedly attached so as to be tied to the wire C5 by an attachment member C12 such as a vinyl tape.

  The camera cord C11 of the camera C1 tied to the lower end portion of the wire C5 in this way is extended upward along the wire C5, and exits from the top opening 12 to the outside and is connected to the monitor C2. As a result, it is possible to observe the internal image captured by the camera C1 on the monitor C2 and confirm whether the internal image is normal.

  Specifically, the weight C7 at the lower end of the wire C5 is inserted into the inside from the top opening 12 of the utility pole 1, and the camera C1 attached near the lower end of the wire C5 is also inserted into the inside from the top opening 12. When the handle C9 of the winder C8 is operated and the wire C5 is gradually lowered downward so as to be pulled by the weight of the weight C7, the camera C1 bound to the wire C5 is also gradually lowered inside. In the middle of getting off, the camera C1 sequentially captures the internal state and observes the sequentially captured images on the monitor C2 to check whether the interior is normal.

  In this way, when the camera C1 reaches the bottom of the innermost lower end portion, the state of the bottom is captured by the camera C1, and the captured image is confirmed by the monitor C2. For example, earth and sand C13 containing sludge and the like are slightly raised on the bottom inside the utility pole 1, and the accumulated water C14 is present on the earth and sand C13. Moreover, the concrete bulges inward in the outer peripheral part near the lowermost end part of the electric pole 1 to form Noro C15, and the wire C16 that constitutes the outer peripheral part of the electric pole 1 together with the concrete is exposed in a part of the outer peripheral part. In some cases, these states are imaged by the camera C1 and confirmed by the monitor C2.

  And when there exists the stored water C14, earth and sand C13, etc. in the bottom part of the utility pole 1, it discharges outside using an exhaust pump, a vacuum, etc., for example.

  Further, in the inside of the utility pole 1, a ground wire C17 having a lower end grounded at a portion buried in the ground and an upper end extending upward is provided along the inner wall. C17 is processed so as not to hinder the arrangement of the rods 21, 22 and the like. In FIG. 9, the steady rest guide G is not attached to the top portion 13 of the utility pole 1 for the sake of simplification of the figure, but actually the steady rest guide G is attached at this stage.

  As described above, the smooth insertion confirmation operation using the test rod placement jig T for checking whether or not the rods and the rod placement jigs 5a and 5b can be smoothly inserted therein, and the camera C1 and the monitor C2 When the video confirmation operation for photographing the inside and confirming with the video is completed, the lower reinforcing step is performed.

  As shown in FIG. 2, in the lower reinforcing step, first, a side opening 11 is formed by a drilling machine L101 such as an electric drill at a location near the ground surface on the side surface of the utility pole 1, for example, a location 1 m to 1.6 m from the ground surface. (S101 in FIG. 2). The shape of the side opening 11 is a substantially rectangular shape or a substantially elliptical shape having a horizontal diameter of about 50 mm and a vertical diameter of about 40 cm.

  By the way, reinforcing bars are arranged at a predetermined interval in the concrete that forms the outer periphery of the utility pole 1, and the reinforcing bar arrangement interval in the longitudinal direction (substantially vertical direction when standing) is the horizontal direction of the outer periphery. There are places where the bar spacing interval is slightly larger than the other places every 90 degrees. In such places, a groove for attaching a ground hole or a scaffold bolt is often provided. The position where the side opening 11 is provided must be a place where there is no reinforcing bar.

  Next, the rod 21 is inserted from the side opening 11. As shown in FIG. 10, the rod 21 is a rod-shaped aramid rod 210 formed of aramid fibers and a lower end portion of the aramid rod 210. It has a heavy bar 2a attached via a reinforcing bar and the like, and a wire 21a made of cotton or stainless steel is attached to the upper end portion. The length of the aramid rod 210 is, for example, about 2.8 m, and the length of the heavy bar 2a is, for example, 80 cm.

  A plurality of such rods 21 are inserted one by one from the side opening 11 as shown in FIG. 2, and each wire 21a is held outside the side opening 11 (S102 in FIG. 2).

  Next, as shown in FIG. 11, the string 73 is connected to the rod placement assisting tool 7 in which a plurality of U-shaped metal through portions 72 are evenly provided in the circumferential direction outside the annular metal frame 71. . In addition, the rod arrangement | positioning auxiliary tool 7 of FIG. 11 is a thing when ten rods 21 are used. In the following description, a case where ten rods 21 are used will be described, but the present invention is not limited to this number.

  Next, each wire 21a is distributed and passed through the plurality of through portions 72. Next, the five wires 21a are sequentially passed through the suspension portion 811 and the through-hole portions 812, 813, and 814 of the suspension jig 81 shown in FIG. Further, the remaining five wires 21a are sequentially passed through the suspension portion 821 and the through-hole portions 822, 823, and 824 of the suspension jig 82 shown in FIG.

  Here, the suspension jigs 81 and 82 will be described in detail.

  A suspension jig 81 shown in FIG. 12 is made of a different type of reinforcing bar, and suspends and supports a wire 21a fastened to the rod 21 to fix the position of the rod 21, and this reinforcing member fixing portion 815. And a support portion 816 that supports the material fixing portion 815.

  The reinforcing material fixing portion 815 has an opening surface (through hole) for suspending and supporting the wire 21 a fastened to the upper end of the rod 21, and when the wire 21 a is tensioned by the tension applied from the outside of the utility pole 1. In addition, a plurality of suspension portions 811 for fixing the positions of the rods 21 are provided by welding or the like so that the distances between the adjacent suspension portions are equal. In addition, in FIG. 12, although the opening surface of the suspension part 811 has comprised circular shape, this is only an example to the last, For example, an ellipse or a square may be sufficient. Furthermore, it is possible to increase the strength of the suspension portion 811 itself by coating the inner side surface of the suspension portion 811 with a cemented carbide with a shrinkage or the like.

  The support portion 816 has a function of facilitating insertion by making the through hole portion 812 and the suspension jig 81 easy to apply a tension from the outside through the wire 21a exposed from the suspension portion 811 to the outside. When the jig operation unit 817 and the rod 21 are suspended, there are provided placing portions 818 and 819 for placing a suspension jig 82 to be described later on the upper portion. The number of mounting parts is not necessarily two, but three, four, five, etc., depending on the weight of the jig to be placed and supported on the upper part, the length of the support part 816, and the like. It is also possible to provide a plurality.

  Here, the diameter of the reinforcing bar forming the support portion 816 and the thickness of the through hole portion 812 (the length in the direction perpendicular to the plane through which the arc of the reinforcing material fixing portion 815 passes) are set so as to be inserted from the side surface opening portion 11. The Specifically, when the diameter of the side opening 11 in the short direction (horizontal direction) is about 40 to 50 mm, the total thickness of the diameter of the reinforcing bar of the support 816 plus the thickness of the through hole 812 is 28 mm. If it does not exceed, it can be applied to all existing types of utility poles.

  The suspension jig 82 shown in FIG. 13 is also made of a different type of reinforcing bar, and similarly to the suspension jig 81, a reinforcing material fixing portion 825 that suspends and supports the wire 21a and fixes the rod 21 and fixing the reinforcing material. And a support portion 826 that supports the portion 825.

  A plurality of suspension portions 821 having an opening surface through which the wire 21a is passed are provided to the arc-shaped reinforcing material fixing portion 825. The number of the suspended portions 821 does not necessarily need to be three as shown in FIG. 13, the shape of the opening surface is not limited to a circle, and a cemented carbide is applied to the inner surface of the opening of the hanging portion 821. The point which can improve intensity | strength using is the same as that of the case of the suspension jig | tool 81. FIG.

  The through-hole portions 812 and 822 are provided with holes corresponding to the number of the suspension portions 811 and 821, that is, three through-holes here, and each wire 21a passes through a different through-hole. Thus, the wires 21a extending to the outside of the utility pole 1 can be prevented from being entangled with each other.

  Needless to say, the through-hole portion 822 and the jig operation portion 827 have the same functions as the corresponding portions (the lower one digit is the same) of the suspension jig 81 described above. Incidentally, since the support portion 826 is placed on the placement portions 818 and 819 of the suspension jig 81 inside the utility pole 1, the suspension jig 82 itself does not include the placement portion.

  The diameter of the reinforcing bars constituting the reinforcing material fixing portions 815 and 825 is about 16 mm. Further, when applied to the utility pole 1 having the total length described above (total length of about 16 m), it is preferable that the length of the arc chords of the reinforcing material fixing portions 815 and 825 is about 230 mm.

  By the way, in the suspension jigs 81 and 82, it is also possible to make the parts inserted into the utility pole 1 detachable from the support portions 816 and 826, respectively.

  Now, the five wires 21a are sequentially passed through the suspension portion 811 and the through-hole portions 812, 813, and 814 of the suspension jig 81, and the suspension portion 821 of the suspension jig 82 showing the remaining wires 21a. After sequentially passing through the holes 822, 823, and 824, the rod placement assisting tool 7 is inserted from the side opening 11 so as to feed out the string 73.

  Next, the suspension jigs 81 and 82 are inserted into the inside from the side opening 11.

  First, the suspension jig 81 is inserted. At this time, the surface (arc surface) including the arc formed by the reinforcing material fixing portion 815 is made parallel to the vertical surface, and the support portion 816 is included in the arc. The longer arc is on the bottom. At this stage, the axial direction of the support portion 816 is oriented in a direction slightly inclined from the horizontal direction. After that, the lower arc portion, that is, the arc portion having the longer arc length with respect to the support portion 816 is first inserted, and then the axis of the support portion 816 rotates so as to be oriented in the horizontal direction. , Insert the remaining part (arc part with a short arc length). After inserting up to the through hole portion 812, the orientation direction (horizontal direction) of the support portion 816 is fixed, and the arc surface is rotated 90 degrees with the direction as a rotation axis (in this case, the jig operation portion 817 is used as a lever) ). As a result, the arc surface becomes parallel to the horizontal direction. When the support portion 816 is pulled outside the utility pole 1 in this state, the reinforcing material fixing portion 815 comes into contact with the inner wall surface of the utility pole 1. After that, positioning is performed by lowering the suspension jig 81 as it is vertically downward until it comes into contact with the lower end of the side opening 11.

  Thereafter, the suspension jig 82 is inserted into the utility pole 1. Also in this case, the plane (arc surface) including the arc formed by the reinforcing material fixing portion 825 is made to be parallel to the vertical surface, and, similarly to the case of the suspension jig 81, the arc is first formed with the support portion 826 as a boundary. After inserting the longer arc portion and rotating the support portion 816 so that the axis of the support portion 816 is oriented in the horizontal direction, the remaining arc portion is inserted inside and the through hole portion 822 is inserted inside. The arc surface is rotated 90 degrees with the direction in which the support portion 826 is directed as the rotation axis. Here, it goes without saying that the jig operation unit 827 is used as appropriate. When the support portion 826 is pushed out in this state, the reinforcing material fixing portion 825 comes into contact with the inner wall surface facing the side surface opening portion 11. Then, the reinforcing material fixing portion 825 is lowered downward while being in contact with the inner wall surface, and the support portion 826 is placed on the placement portions 818 and 819 of the suspension jig 81.

  FIG. 14 is a view showing a state in the vicinity of the side opening 11 when the rod 21 is suspended inside the utility pole 1 using the suspension jigs 81 and 82. In addition, the rod arrangement | positioning auxiliary tool 7 and the string 73 are abbreviate | omitted here.

  As shown in the figure, the five wires 21 a penetrating the suspension portion 811 of the suspension jig 81 pass through the through-hole portions 812, 813, and 814. Then, the wire 21a is secured to the protrusions and the like appropriately provided on the support portion 816 using a metal fitting, so that the tension state of the wire 21a is maintained. Similarly, the wire 21a for suspending the rod 21 via the suspension jig 82 is also passed through the through-hole portions 822 and 823 and appropriately fixed to the support portion 826.

  It is further preferable that the suspension jigs 81 and 82 are fixed to each other using a connecting member that connects the support portions 816 and 826. As an example of this, it is assumed that the jig operating portions 817 and 827 are fixed to each other using an appropriate fixing metal fitting, but it is of course not limited thereto. In addition, if the two suspension jigs 81 and 82 are appropriately fixed to the utility pole 1, the stability when the rod 21 is suspended is further improved. Now, as shown in FIG. 14, when the string 73 is further fed out, the rod placement assisting tool 7 reaches each rod 21 by being guided by each wire 21a, and as shown in FIG. Are dispersed and penetrated through the plurality of through portions 72. And if the string 73 is further sent out, the rod arrangement | positioning auxiliary tool 7 will descend | fall on the heavy rod 2a with dead weight.

  Returning to FIG. 2, next, crushed stone 3 (or beans gravel or the like) is introduced as a reinforcing agent from the side opening 11. Here, the crushed stone 3 is put in the bucket L102, and the crushed stone 3 is thrown in from the bucket L102 until the heavy bar 2a is filled (S103 in FIG. 2).

  Next, the string 73 is first pulled to raise the rod placement assisting tool 7 below the side opening 11, and a funnel member L103 containing a reinforcing agent 4a (non-shrink mortar, etc.) is attached to the side opening 11, and a bucket is attached. The reinforcing agent 4a is introduced from L102 through the funnel-shaped member L103 (S104 in FIG. 2).

  Then, for example, when the non-shrink mortar that is the reinforcing agent 4a is solidified to some extent, the suspension jigs 81 and 82 are extracted to the outside of the utility pole 1. At this time, the operations of the procedure reverse to the operation for inserting the suspension jigs 81 and 82 and fixing the wire 21a are performed. After the extraction, the wire 21a exposed to the outside of the utility pole 1 is cut, and the remaining part is stored inside the utility pole 1 and so on. Since the non-shrink mortar has a certain degree of viscosity, the suspension jigs 81 and 83 can be pulled out while the non-shrink mortar is charged.

  Next, an upper reinforcing step is performed. This upper reinforcing step includes the rod arrangement (S19), internal confirmation (S21), and reinforcing agent charging (S23) in FIG.

  In the rod arrangement, a winder similar to the winder in FIG. 9 is used. In the following, the same components as those shown in FIG.

  First, the tip of a support member C3 provided with a winder C8 similar to the winder C8 of FIG. 9 is positioned above the top opening 12. A wire C5 having a weight C7 and a snap-attached salcan C6 attached thereto is wound around the winder C8. The wire C5 is fed from the winder C8 so that the weight C7 and the snap-in salcan C6 are connected to the utility pole 1. Descent inside.

  Next, the rod 22 is inserted into the interior. As shown in FIG. 22, the rod 22 is composed of a rod-shaped aramid rod 220 formed of aramid fibers, and a lower end portion of the aramid rod 220 via, for example, a deformed reinforcing bar. The aramid string 22a is attached to the upper end portion. The length of the aramid rod 220 is, for example, about 8.5 m, and the length of the heavy bar 2a is, for example, 80 cm.

  Here, by pulling out the weight C7 and the snapped salcan C6 that have descended inside the utility pole 1 from the side opening 11, the aramid cord 22a is connected to the snapped salcan C6, and the wire C5 is wound up by the winder C8. The aramid string 22a and the rod 22 rise inside (S105 in FIG. 3). Then, when the aramid string 22a reaches the top portion 13, the aramid string 22a is removed from the snap-attached salcan C6, and the aramid string 22a is connected to the connecting rod G4 of the steadying guide G to suspend the rod 22 (FIG. 2). S105). By repeating such operations, a plurality of (four in FIGS. 3 and 4) rods 22 are suspended inside (S106 in FIG. 3). In the following description, a case where four rods 22 are used will be described, but the present invention is not limited to this number. Further, by arranging the connecting rods G4 at equal positions in the circumferential direction of the utility pole 1, the aramid cords 22a and thus the rods 22 can be evenly arranged in the circumferential direction.

  Next, each aramid string 22a is removed, and all the rods 22 are lowered until the lower end reaches the reinforcing agent 4a (S107 in FIG. 3).

  Next, the rod placement jig 5 a is inserted from the top opening 12 of the utility pole 1 into the interior using the steady rest guide G.

  As shown in part of FIG. 17, the rod placement jig 5 a is provided with two rod placement mechanisms 51 in a rod-like portion 512. FIG. 17 shows one of them. The rod arrangement mechanism 51 has four arm portions 515 including an upper arm portion 513 and a lower arm portion 514 to which the penetrating portion 511 is attached. The arm portion 515 is radially and circumferentially from the rod-like portion 512. Evenly provided. Further, the penetrating portion 511 has a connecting portion 517 that can be inserted into a hole 516 formed in the middle of the upper arm portion 513 and the lower arm portion 514, and this connecting portion 517 is either the upper arm portion 513 or the lower arm portion 514. It is attached by inserting into the hole 516.

  In addition, when the rod placement mechanism 51 is inserted into the inside of the utility pole 1, the rod placement mechanism 51 is brought into contact with the inner wall surface of the elbow that movably connects the upper arm portion 513 and the lower arm portion 514. A flat washer 518 that facilitates the horizontal expansion of the plate is movably attached.

  More specifically, when the penetrating portions 511 are attached to the arm portions 515 by the connecting portions 517, the penetrating portions 511 do not become the same side of the upper arm portion 513 and the lower arm portion 514 between adjacent arm portions 515, but alternately. It is changed and attached as follows. In other words, when the penetrating part 511 is attached to the upper arm part 513 in a certain arm part 515, the penetrating part 511 is attached to the lower arm part 514 in the arm part 515 adjacent to the arm part 515 on both sides. Yes.

  In addition, the lower end portions of the plurality of lower arm portions 514 are fixedly attached to the rod-like portion 512 by a fixed connecting portion 519, and the upper arm portions 513 are movable with respect to the rod-like portion 512 by a movable connecting portion 5110. When the movable connecting portion 5110 is attached and moved upward with respect to the fixed connecting portion 519, the rod arrangement mechanism 51 has an arm portion composed of an upper arm portion 513 and a lower arm portion 514 as shown in FIG. 515 is closed and narrowed (squeezed) as a whole so that it can be easily inserted into the inside of the utility pole 1 from the top opening 12 of the top 13 of the utility pole 1.

  As shown in FIG. 17, a stopper 5111 is fixedly attached to the rod-like portion 512 at a position slightly above the position of the fixed connecting portion 519 to which the lower end portion of each lower arm portion 514 is attached. As a result, the movable connecting portion 5110 that slidably attaches the upper end portion of each upper arm portion 513 to the rod-like portion 512 is prevented from moving below the stopper 5111.

  Moreover, each penetration part 511 is attached so that the edge parts of the two semi-annular members 5112 and 5113 which have the same diameter can mutually move. A connecting portion 517 is attached to the middle of one semi-annular member 5112, and is attached to the hole 516 of the arm portion 515 by this connecting portion 517.

  In contrast to such a rod arrangement jig 5a, the rod arrangement jig 5b includes one rod arrangement mechanism 51 shown in FIG.

  When the rod placement jig 5a as shown in FIG. 17 is inserted, the upper end of the rod placement jig 5a is inserted into the notch G3 of the steady rest guide G as shown in FIG. Then, the rod placement jig 5a is pushed upward from the notch G3, the upper end of the rod placement jig 5a passes through the annular portion G1, and the rod placement jig 5a is leaned on the annular portion G1 as shown in the figure. To prevent shaking.

  Thus, in a state where the upper end portion of the rod placement jig 5a is inserted into the annular portion G1 and leans to prevent swinging, the rod placement jig 5a is further pushed upward, and the rod placement jig 5a When the lower end portion of the rod exceeds the top portion 13, the lower end portion is inserted from the top portion opening portion 12, and the rod placement jig 5a is lowered. Here, when the rod arrangement mechanism 51 passes through the top opening 12, each aramid cord 22a is once removed and passed through the through portion 511, and then each aramid cord 22a is attached again (S108 in FIG. 3). Further, it is desirable that the rod arrangement mechanism 51 attached to the rod arrangement jig 5a is narrowed (squeezed) as a whole by closing the arm portion 515 as shown in FIG.

  Next, the method of FIG. 19 is used for the rod placement jig 5b, and when the lower end of the rod placement jig 5b exceeds the top portion 13, the rod placement jig 5a and the rod placement jig 5b are connected to each other. Moreover, the aramid string 23a is connected to the rod arrangement jig 5b.

  As shown in FIG. 20A, the rod placement jig 5a has a stone butt 521 attached to the lower end portion of the rod-like portion 512, and the rod placement mechanism 51 attached to two locations near the lower end portion and the upper end portion. ing. A male screw 5221 is formed on the upper end 522 of the rod placement jig 5a as shown in an enlarged view in FIG. 20A, and an enlarged view is shown in FIG. 20A in the lower end 523 of the rod placement jig 5b. Thus, a female screw 5231 is formed. The length of the rod placement jig 5a is, for example, 4.2 m.

  The rod placement jig 5b has a lower end portion of the rod-like portion 512 connected to an upper end portion of the rod placement jig 5a, and a rod placement mechanism 51 attached to substantially the center of the rod-like portion 512. The length is, for example, 2.7 m. A pin 5241 is attached to the upper end 524 of the rod placement jig 5b as shown in an enlarged view in FIG.

  Here, the rod placement jig 5a and the rod placement jig 5b are connected by screwing the male screw 5221 into the female screw 5231. In addition, by previously marking one of the upper arm portions 513 of each rod arrangement mechanism 51 and adjusting the mark so that it is at the same position in the circumferential direction of the utility pole 1, the crossing of the aramid cords 22a is performed. It can be prevented as much as possible.

  Now, when the rod arrangement jig 5a and the rod arrangement jig 5b are connected, the connected portion is inserted from the top opening 12, and the rod arrangement jig 5b is lowered. Here, when the rod arrangement mechanism 51 passes through the top opening 12, each aramid cord 22a is once removed and passed through the through portion 511, and then attached to the steady rest guide G (S109 in FIG. 3).

  Moreover, the aramid cords 22a can be prevented from crossing by not rotating the rod placement jigs 5a and 5b at the time of insertion.

  In this way, when the rod placement jigs 5a and 5b are inserted, the penetrating portion 511 is guided by the aramid string 22a to reach the rod 22, and when further inserted, the rod 22 penetrates as shown in FIG. The portion 511 is penetrated (S109 in FIG. 3).

  Next, when the method of FIG. 19 is used for the connecting rod 6a and the lower end portion of the connecting rod 6a exceeds the top portion 13, the upper end portion of the rod placement jig 5b shown in FIG. The lower end part of the connecting rod 6a shown is connected.

  As shown in FIG. 20B, a lock-type slit 6111 is formed in the lower end 611 of the connecting rod 6a so that the pin 5241 at the upper end of the rod placement jig 5b can be remotely removed. . Accordingly, when the locking slit 6111 of the connecting rod 6a is fitted to the pin 5241 of the upper end portion 524 of the rod arranging jig 5b, the connecting rod 6a is connected to the rod arranging jig 5b.

  Although this connection is not easily removed, as can be seen from the structure of the lock-type slit 6111, if the connection rod 6a is slightly moved in the longitudinal direction and rotated so that the pin 5241 passes through the side hole of the lock-type slit 6111, the connection The rod 6a is remotely released from the connection with the rod placement jig 5b, and the connecting rod 6a can be removed.

  And the connected part is inserted from the top opening part 12, and the connecting rod 6a is lowered.

  Next, using the method of FIG. 19 for the connecting rod 6b, when the lower end of the connecting rod 6b exceeds the top portion 13, the upper end of the connecting rod 6a and the lower end of the connecting rod 6b are connected.

  As shown in FIG. 20B, a male screw 6121 is formed at the upper end 612 of the connecting rod 6a, a female screw 6131 is formed at the lower end 613 of the connecting rod 6b, and the female screw 6121 of the connecting rod 6a is connected to the connecting rod 6b. The connecting rod 6a and the connecting rod 6b are connected by being screwed to the female screw 6131.

  Then, the connected portion is inserted from the top opening 12, the connecting rod 6b is lowered, and when the rod placement jig 5a reaches the reinforcing agent 4a, the insertion of the connecting rod 6b is stopped (S110 in FIG. 3).

  Next, the arrangement | positioning condition inside the utility pole 1 is confirmed (S21 of FIG. 5). Here, as shown in FIG. 22, it is performed using a camera C1, a monitor C2, and the like.

  First, the weight C7 at the lower end of the wire C5 is inserted from the top opening 12 of the utility pole 1, and the camera C1 attached near the lower end of the wire C5 is also inserted from the top opening 12, and then the winder C8. When the wire C5 is gradually lowered downward so as to be pulled by the weight of the weight C7 by operating the handle C9, the camera C1 bound to the wire C5 also gradually descends along the edge. Therefore, the camera C1 sequentially images the arrangement state of the rod 22, the rod arrangement jigs 5a and 5b, and the rod arrangement mechanism 51 on the way down, and the sequentially imaged image is observed on the monitor C2. Then, it is confirmed whether or not the rod arrangement jigs 5a and 5b and the rod arrangement mechanism 51 are properly arranged.

  After confirming the arrangement status, the connecting rods 6a and 6b are removed from the rod arrangement jig 5a and removed, the steadying guide G is removed, and the side opening 11 is filled with a water-stopping agent such as water-stopping mortar and water-stopping cement. Block (S111 in FIG. 4). Further, the aramid cords 22a and 23a are removed from the connecting rod G4 of the steady rest guide G and fixed to the top portion 13 with a gum tape GT or the like (S111 in FIG. 4).

  Then, a funnel-shaped member L103 is attached to the top opening 12 of the utility pole 1, and a reinforcing material (such as a non-shrinking mortar) 4b is dropped from the bucket L102 through the funnel-shaped member L103 into the interior of the utility pole 1 so that the rod 22, the gap between the rod placement jigs 5a and 5b is filled with the reinforcing agent 4b. At this time, the concave portion 131 is formed in the top portion 13 by stopping the charging before the reinforcing agent 4 b reaches the top opening portion 12.

  Then, the steady rest guide G is attached again, and one rod 23 is pushed into the reinforcing agent 4b (S112, 113 in FIG. 4). Since the utility pole 1 is narrow at the top, the number of rods 23 is smaller than the number of rods 22.

  As shown in FIG. 23, the rod 23 has a rod-shaped aramid rod 230 formed of aramid fibers, and a heavy bar 2a attached to the lower end of the aramid rod 230 via, for example, a deformed reinforcing bar. The length of the aramid rod 230 is, for example, about 5 m, and the length of the heavy bar 2a is, for example, 30 cm. Further, string guides 231 are attached to the aramid rod 230 at, for example, three places. When pushing the rod 23 into the reinforcing agent 4b, the aramid cord 23a is removed from the connecting rod G4 of the steady guide G, and the removed aramid cord 23a is passed through the string guide 231, so that the rod 23 is inserted into the rod placement jig 5b. Therefore, the range above the rod placement jig 5b can be reinforced by the rod 23.

  Even when the aramid string 23 a is not passed through the string guide 231, the inside of the utility pole 1 becomes narrower as it goes upward, and the floating principle works. Therefore, the rod 23 can be arranged at the center inside the utility pole 1. .

  After the rod 23 is pushed into the reinforcing agent 4b, the aramid cord 23a is pulled and fixed to the top 13 with a gum tape GT or the like (S113 in FIG. 4). Then, the steady rest guide G is removed from the utility pole 1. Further, the reinforcing agent 4c (non-shrinking mortar or the like) c is introduced into the recess 131 from the bucket L102 until the tip of the rod 23 is hidden (S114 in FIG. 4, S23 in FIG. 5). When the rod 23 floats, the rod 23 is pushed back to the reinforcing agent 4c until the tip is hidden. In addition, the rod 23 can be prevented from being lifted by passing a gum tape in a cross shape, for example, on the reinforcing agent 4 c and sticking the end of the gum tape to the top portion 13.

  Then, the gum tape GT is removed, the aramid strings 22a and 23a are collected in the top opening 12, and a lid L is attached to the top opening 12 (S115 in FIG. 4 and S25 in FIG. 5). And finally, the utility pole 1 is restored (S27 in FIG. 5) by reinforcing the portion closing the side opening 11 with the aramid fiber sheet 6 (S26 in FIG. 5).

  Here, an example of the sticking method of the aramid fiber sheet 6 is given. First, an aramid fiber sheet having a width of about 30 cm and having a yield strength of 120 tf / m (1176 kN / m) is pasted twice in the vicinity of the side opening 11 so that the yield strength is substantially vertical (2). Forming a layer). Thereafter, an aramid fiber sheet having a width of about 10 cm and having a yield strength of 90 tf / m (882 kN / m) is spirally wound around the side opening 11 so that the yield strength becomes a yield strength in a substantially horizontal direction.

  In the above description, the rods 21 and 22 inserted into the inside of the utility pole 1 are respectively 10 and 4, and the penetrating portion 72 of the rod placement assisting tool 7 and the penetrating portions 511 of the rod placing jigs 5a and 5b are used. The example in which the number of rods is provided has been described, but the number of rods and the number of penetrating portions can be appropriately changed according to the size of the inside of the utility pole 1 and other various conditions.

  Further, the total number of rod arrangement mechanisms 51 is not three, but may be 1, 2 or 4 or more.

It is a figure which shows the utility pole reinforced with this reinforcement method, its inside, and a main reinforcement member. It is a figure which shows the utility pole 1 in each process of this reinforcement method, and its inside. It is a figure which shows the utility pole 1 in each process of this reinforcement method, and its inside. It is a figure which shows the utility pole 1 in each process of this reinforcement method, and its inside. It is a flowchart of this reinforcement method. It is a figure which shows a mode that the steadying guide G is attached. It is a figure which shows a fall prevention net N and a mode that it is attached. It is a figure which shows a mode that the cover L is removed. It is a figure which shows a mode that the inside is confirmed using the camera C1 and the monitor C2. It is a figure which shows the rod 21. FIG. It is a figure which shows a mode that the string 73 was connected to the rod arrangement | positioning auxiliary tool 7. FIG. It is a figure which shows the hanging jig | tool 81. FIG. It is a figure which shows the hanging jig | tool 82. FIG. It is a figure which shows a mode that the rod 21 was suspended with the suspension jigs 81 and 82. FIG. It is a figure which shows a mode that the rod 21 penetrated the penetration part 72. FIG. It is a figure which shows the rod 22. FIG. It is a figure which shows the rod arrangement | positioning jig | tool 5a. It is a figure which shows the state which closed the rod arrangement | positioning mechanism 51 thinly. It is a figure which shows a mode when inserting the rod arrangement | positioning jig | tool 5a. It is a figure which shows rod arrangement | positioning jig | tool 5a, 5b and connecting rod 6a, 6b. It is a figure which shows a mode that the rod 22 penetrates the penetration part 511. FIG. It is a figure which shows a mode that the inside is confirmed using the camera C1 and the monitor C2. It is a figure which shows the rod 23. FIG. It is a figure which shows the structure of a general utility pole.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Electric pole 2a ... Heavy bar 3 ... Crushed stone 4a, 4b, 4c ... Reinforcing agent 5a, 5b ... Rod arrangement jig 6 ... Aramid fiber sheet 6a, 6b ... Connecting rod 7 ... Rod arrangement auxiliary tool 11 ... Opening part 12 ... Top part Opening 13 ... Top 13a ... Bolt 16 ... Reinforcement 17 ... Concrete 21, 22, 23 ... Rod 210, 220, 230 ... Aramid rod 21a ... Wire 22a, 23a ... Aramid string 51 ... Rod arrangement mechanism 71 ... Frame 72 ... Through part 73 ... String 81, 82 ... Suspension jig 101 ... Bar 103 ... Gold hammer 131 ... Recess 231 ... String guide 511 ... Penetrating portion 512 ... Bar-shaped portion 513 ... Upper arm portion 514 ... Lower arm portion 515 ... Arm portion 516 ... Hole portion 517 ... Connecting part 518 ... Plain washer
519: Fixed connecting portion 522: Upper end portion 523 ... Lower end portion 524 ... Upper end portion 611 ... Lower end portion 612 ... Upper end portion 613 ... Lower end portion 811, 821 ... Spear suspension portion 812, 822 ... Through hole portion 815, 825 ... Reinforcement material fixing 816, 826 ... support part 817, 827 ... jig operation part 818, 819 ... mounting part 5110 ... movable connecting part 5111 ... stopper 5112, 5113 ... semi-annular member 5241 ... pin 6111 ... locking slit C1 ... camera C2 ... Monitor C3 ... Supporting member C4 ... Rotating member C5 ... Wire C6 ... Salcan with snap C7 ... Weight C8 ... Winding device C9 ... Handle C10 ... Mounting member C11 ... Camera cord C12 ... Mounting member C13 ... Sand sand C14 ... Water storage C15 ... Noro C16 ... Wire C17 ... Ground wire G ... Guide G1 ... Annular part G2 ... Arc part G3 ... Part 4 ... Connecting rod G5 ... Tape GT ... Gum tape L ... Lid L101 ... Drilling machine L102 ... Bucket L103 ... Funnel-shaped member N ... Fall prevention net N1 ... Net part N2 ... Horizontal bar N3, N5, N6 ... String N3 ... String N4 ... vertical bar

Claims (12)

Forming a side opening on the side of an upright hollow concrete utility pole;
A lower reinforcing step for reinforcing a range below the side opening from the inside;
An upper reinforcement step of reinforcing the range above the side opening from the inside;
The upper reinforcing step includes
A rod insertion step of inserting a plurality of rods from the side opening;
A jig insertion step of inserting a rod placement jig having a rod placement mechanism having a plurality of through portions through which the plurality of rods are dispersed and penetrated from the top opening of the utility pole;
A rod penetrating step for dispersing and penetrating the plurality of rods through the plurality of penetrating portions;
Clogging the side opening;
And a reinforcing agent feeding step of feeding a reinforcing agent from the top opening. In the rod insertion step,
Lower the rope from the top opening to the inside,
Connecting the rope and a string connected to the rod;
Pull the string through the rope,
The reinforcing method according to claim 1, wherein the string is held at the top while the rod is suspended. In the jig insertion step,
Remove the string held at the top,
Pass the string through the penetration,
Insert the rod placement jig,
In the rod penetration step,
The reinforcing method according to claim 2, wherein the rod is passed through the penetrating portion by the guide by the string. The rod placement jig comprises the rod placement mechanism in a rod-shaped part,
The rod arrangement mechanism is
A movable connecting portion slidably attached to the rod-shaped portion;
A fixed connecting portion fixedly attached to the rod-shaped portion;
One end is rotatably attached to the movable connecting portion, and a plurality of upper arm portions that are attached radially and circumferentially from the rod-shaped portion around the rod-shaped portion,
One end is rotatably connected to the other end of each of the plurality of upper arm portions, and the other end includes a plurality of lower arm portions that are rotatably attached to the fixed connection portion,
The reinforcing method according to any one of claims 1 to 3, wherein the penetrating portion is provided in one of the upper arm portion and the lower arm portion that are rotatably connected. The reinforcing method according to claim 4, wherein when the rod arrangement mechanism passes through the top opening in the jig insertion step, the movable connecting portion and the fixed connecting portion are separated from each other. A string is connected to the rod placement jig in advance,
The rod provided with a string guide for guiding the rod with the string is inserted from the top opening, and is guided to the rod placement jig by the guide by the string guide. Reinforcement method. The reinforcing method according to any one of claims 1 to 6, wherein an anti-sway guide that stops the rod placement jig from swinging is attached to the top. 8. The reinforcing method according to claim 1, further comprising: attaching a fall prevention net for preventing the lid from falling when removing the lid attached to the top opening. Between the rod penetration step and the reinforcing agent charging step,
The reinforcement method according to any one of claims 1 to 8, further comprising a step of suspending a camera inside the power pole and imaging the inside with the camera. In the lower reinforcing step,
Insert a plurality of rods, each of which has a string connected thereto, from the side opening,
Distributing the string through the penetrating part of the rod placement aid having a plurality of penetrating parts through which the plurality of rods are dispersed and penetrated,
Insert the rod placement aid from the side opening,
The plurality of rods are distributed and penetrated through a plurality of penetration portions by guiding with a string,
The reinforcing method according to any one of claims 1 to 9, wherein a reinforcing agent is introduced from the side opening. The rod placement aid used in the lower reinforcement step is
The reinforcing method according to claim 10, wherein a plurality of U-shaped through portions are provided evenly in the circumferential direction outside the annular frame. The reinforcing method according to any one of claims 1 to 11, wherein a portion closing the side opening is reinforced with an aramid fiber sheet.

Images