JP6165489B2 - Reinforcing material for hollow column and method for reinforcing hollow column using the same - Google Patents

Description

  The present invention relates to a reinforcing material for a hollow columnar object such as an electric pole and a method for reinforcing a hollow columnar object using the reinforcing material.

  Conventionally, when reinforcing a hollow columnar object such as a utility pole or a clay pipe, there is a method for reinforcing a hollow columnar object as described in Patent Document 1, for example. In the reinforcing method described in Patent Document 1, a reinforcing sheet is inserted from the upper end of the hollow columnar object, the reinforcing sheet is installed inside the hollow columnar object, and a fluidized solidifying material containing a resin material is injected inside the reinforcing sheet. To do.

JP 2010-168889 A

  However, in the reinforcing method described in Patent Document 1 as described above, the reinforcing sheet is inserted from the upper end portion of the hollow columnar object, and the fluidized solid material is also injected from the upper end portion of the hollow columnar object. For this reason, it is necessary to work at a high place, and at the time of injection of the fluidized solidified material, the fluidized solidified material must be sent once to the upper end of the hollow columnar material, so that the fluidized solidified material is supplied. The pressure required for the operation increases, and a larger equipment such as a pump is required. Therefore, the reinforcement work becomes large and takes time and effort.

  An object of the present invention is to provide a reinforcing material for a hollow columnar object that can be constructed by a simpler method and a method for reinforcing a hollow columnar object using the reinforcing material.

  In order to achieve the above object, the reinforcing material of the hollow columnar article of the present invention is provided with a reinforcing sheet made of a fiber material and formed in a cylindrical shape, and inside the vertical top of the reinforcing sheet, A hollow pipe in which a plurality of through holes are formed along the axial direction, and a holding means that is provided inside the reinforcing sheet and holds the upper part in the vertical direction of the reinforcing sheet from the inside at a predetermined position in the hollow columnar object, It is characterized by having.

  In this invention comprised in this way, a reinforcement sheet is arrange | positioned inside a hollow columnar thing, and the upper part of a reinforcement sheet is hold | maintained in the predetermined position in a hollow columnar thing using a holding means. When the filler is supplied to the hollow pipe, the filler is injected into the hollow columnar object from the plurality of through holes. At this time, since a plurality of through holes are formed in the hollow pipe along the axial direction, the filler is injected from the lower side of the hollow pipe and filled while using the lower through hole and the upper through hole in order. It becomes possible to inject the material into the hollow columnar object. That is, when the filler is supplied from the lower side of the hollow pipe, the filler is injected into the hollow columnar object from the lowermost through hole of the hollow pipe, and when the filler reaches a height that closes the through hole, It is injected from a through hole above the through hole. In this way, by sequentially using the plurality of through holes from below, the filler can be supplied from below. Accordingly, the supply pressure of the necessary filler can be significantly reduced as compared with the conventional case, and a large-scale supply device is not required and construction can be performed by a simpler method. Further, since the filling material can be injected at the lower part of the hollow columnar object, it is not necessary to perform work such as installation work of the supply pipe at a high place, and the construction work of reinforcement is simplified.

In the present invention, preferably, the hollow pipe has flexibility and sufficient strength to lift the reinforcing sheet to a predetermined position of the hollow columnar object.
In the present invention configured as described above, the hollow pipe has flexibility and sufficient strength to lift the reinforcing sheet to a predetermined position of the hollow columnar object. The reinforcing sheet can be installed using a hollow pipe used for injecting the filler when installed inside. Thereby, not only the filling material injection operation but also the reinforcing sheet installation operation can be performed from the lower part of the hollow columnar object using the hollow pipe, so that the operation process can be simplified.

In the present invention, preferably, the reinforcing sheet has its upper end and lower end sealed.
In the present invention configured as above, since the upper and lower ends of the reinforcing sheet are sealed, it is possible to reinforce only a part of the entire length of the hollow columnar object, such as only the upper part of the hollow columnar object, for example. Become.

In the present invention, the hollow pipe is preferably configured to be divided into a plurality of parts.
In the present invention configured as described above, since the hollow pipe is configured to be divided into a plurality of parts, the hollow pipe can be divided when the hollow pipe is conveyed. Accordingly, the total length of the reinforcing material can be shortened, and the reinforcing sheet in a portion where the hollow pipe is not disposed can be folded, so that the reinforcing material can be easily conveyed. In addition, when the hollow pipe is used when the reinforcing sheet is disposed inside the hollow columnar object, the reinforcing sheet is lifted upward by the divided hollow pipe, and then the other is divided into the lower ends of the hollow pipe. By connecting the hollow pipe, the hollow pipe can be extended and the reinforcing sheet can be lifted further upward. Therefore, since it is not necessary to handle a long hollow pipe in advance, for example, over the entire length of the hollow columnar object, the arrangement work of the reinforcing sheet is simplified.

In the present invention, preferably, the holding means is a bag-shaped expansion material that expands and fixes the reinforcing sheet to the inner surface of the hollow columnar object.
In the present invention configured as described above, since the holding means is a bag-shaped expansion material, for example, when the expansion material is expanded by injecting air into the expansion material, the outer surface of the expansion material becomes the inner surface of the reinforcing sheet. Is pressed outward and the reinforcing sheet is pressed against the inner surface of the hollow columnar object, thereby fixing the reinforcing sheet to the inner surface of the hollow columnar object. Since the reinforcing sheet can be fixed by expanding the expansion material, the fixing operation is simplified. Further, since the fixing force of the reinforcing sheet can be grasped to some extent by monitoring the expansion pressure on the expanding material, management of the fixing operation of the reinforcing sheet becomes easy.

In the present invention, preferably, the expansion member is connected to a pressure control instrument arranged outside the hollow columnar object.
In the present invention configured as described above, since the pressure control instrument is connected to the expansion material, when the expansion material is expanded, the expansion state can be known through the measured pressure. Further, since the pressure control instrument is arranged outside the hollow columnar object, the pressure can be confirmed outside the hollow columnar object, so that the confirmation work is facilitated.

  In order to achieve the above object, the method for reinforcing a hollow columnar object of the present invention includes an insertion step of inserting a reinforcing sheet formed in a cylindrical shape into the hollow columnar object, and a predetermined position in the hollow columnar object. A holding step, and a filler through the through-holes in order from the lower through-hole of the hollow pipe in which a plurality of through-holes are formed in the axial direction in the hollow sheet and inside the reinforcing sheet. And an injecting step of injecting.

  In the present invention configured as described above, the reinforcing sheet is inserted into the hollow columnar object and held at a predetermined position, and then filled through the through hole in order from the lower through hole to the upper through hole of the hollow pipe. The material is poured from below the hollow pipe. For this reason, it is possible to perform the injection work at the lower part of the hollow columnar object, and there is no need to lift the filler once to the upper end of the hollow columnar object as in the prior art. Accordingly, the supply pressure of the necessary filler can be significantly reduced as compared with the conventional case, and a large-scale supply device is not required and construction can be performed by a simpler method. Moreover, it is not necessary to perform the work for filling the filler at a high place. Therefore, the construction work for reinforcement is simplified.

In the present invention, preferably, prior to the insertion step, there is an opening forming step for forming an opening below the center in the vertical direction of the hollow columnar object, and the inserting step includes the reinforcement sheet from the opening to the hollow pipe. And push it up to insert it into the hollow columnar object.
In the present invention configured as described above, the reinforcing sheet can be inserted into the hollow columnar object from the lower side using the hollow pipe used for injecting the filler. Therefore, since not only the filling material injection operation using the hollow pipe but also the installation operation of the reinforcing sheet can be performed from the lower part of the hollow columnar object, the operation process can be simplified.

In the present invention, preferably, the inserting step includes a pushing-up step of pushing the reinforcing sheet upward in the hollow columnar object using the first hollow pipe among the plurality of hollow pipes, and the first hollow pipe. Connecting the second hollow pipe to the lower end of the reinforcing sheet, and repeating the push-up process and the connecting process for the other divided hollow pipes to sequentially connect the divided hollow pipes while reinforcing the reinforcing sheet. To the top of the hollow column.
In the present invention configured as above, the reinforcing sheet is pushed up into the hollow columnar object while connecting the hollow pipes divided into a plurality of parts, so that the required work space is reduced and the length of the hollow pipe to be handled is reduced. The work becomes easier because the length becomes shorter. This is particularly useful because, for example, when it is necessary to reinforce the entire length of the hollow columnar object, it is not necessary to handle a long hollow pipe and the work is simplified.

In the present invention, preferably, the holding step includes an expansion step of injecting air into a bag-shaped expansion material provided on the uppermost and inner side of the reinforcement sheet and pressing the reinforcement sheet against the inner surface of the hollow columnar object.
In the present invention configured as described above, in the holding step, air is injected into the expansion material to expand the expansion material, so that the reinforcing sheet can be fixed at a predetermined position inside the hollow columnar object with a simple operation. . Further, since the expansion material is expanded to hold the reinforcing sheet, the fixing force of the reinforcing sheet can be known by the air pressure inside the expansion material. Therefore, the adjustment of the holding force of the reinforcing sheet becomes easy.

In the present invention, preferably, the injecting step is a fixing for releasing the pressure of the air inside the inflating material and releasing the fixing of the reinforcing sheet to the inner surface of the hollow columnar material before the filler is filled to the upper end of the reinforcing sheet. Air pressure monitoring process for monitoring the air pressure inside the expansion material while the filling of the filling material is continued after the release process and the fixing release process, and when the air pressure monitored in the air pressure monitoring process rises, the filling material reaches the expansion material. An injection end step of determining that the injection has been reached and ending the injection of the filler.
In the present invention configured as described above, when the filler is filled in most of the lower portion of the reinforcing sheet, the reinforcing sheet is held inside the hollow columnar material without the expanding material. After releasing the pressure, the filling of the filler is continued and the air pressure inside the expander is monitored. When the filler is filled up to the position covering the expansion material, the air remaining inside the expansion material is pushed by the outer filler, and the pressure in the expansion material increases. Here, since the expansion material is located at the uppermost part of the reinforcing sheet, an increase in the air pressure in the expansion material indicates that the filler has reached the position of the expansion material. It means that you have reached the top. Therefore, the injection of the filler is ended in the injection end process. Since the filling height of the filling material can be known by monitoring the air pressure of the expansion material, the filling completion timing of the filling material can be easily and reliably grasped.

It is the figure which fractured | ruptured partially which shows the reinforcing material of the hollow columnar thing concerning one Embodiment of this invention. It is a partial expanded sectional view which shows the upper part inside of the reinforcing material of the hollow columnar thing concerning one Embodiment of this invention. It is a figure which shows the state at the time of conveyance of the reinforcing material of the hollow columnar thing concerning one Embodiment of this invention. It is a figure which shows the method of reinforcing a hollow columnar thing using the reinforcing material of the hollow columnar thing concerning one Embodiment of this invention. It is a figure which shows the method of reinforcing a hollow columnar thing using the reinforcing material of the hollow columnar thing concerning one Embodiment of this invention. It is a figure which shows the method of reinforcing a hollow columnar thing using the reinforcing material of the hollow columnar thing concerning one Embodiment of this invention. It is a figure which shows the method of reinforcing a hollow columnar thing using the reinforcing material of the hollow columnar thing concerning one Embodiment of this invention. It is a figure which shows the method of reinforcing a hollow columnar thing using the reinforcing material of the hollow columnar thing concerning one Embodiment of this invention. It is a figure which shows the method of reinforcing a hollow columnar thing using the reinforcing material of the hollow columnar thing concerning one Embodiment of this invention. It is a figure which shows the leakage prevention valve at the time of reinforcing a hollow columnar thing using the reinforcement material of the hollow columnar object concerning one Embodiment of this invention. It is a figure which shows the method of reinforcing a hollow columnar thing using the reinforcing material of the hollow columnar thing concerning one Embodiment of this invention. It is a figure which shows the method of reinforcing a hollow columnar thing using the reinforcing material of the hollow columnar thing concerning one Embodiment of this invention. It is a figure which shows the method of reinforcing a hollow columnar thing using the reinforcing material of the hollow columnar thing concerning one Embodiment of this invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
A reinforcing material for hollow columnar objects according to an embodiment of the present invention will be described.
FIG. 1 is a partially broken view showing a reinforcing member 1 of a utility pole 100 (FIG. 4 and the like) according to an embodiment of the present invention. In this embodiment, the hollow electric pole 100 is employ | adopted as a hollow columnar thing. As shown in FIG. 1, the reinforcing member 1 includes a cylindrical reinforcing sheet 2, a hollow pipe 4 attached to the top of the reinforcing sheet 2 in the vertical direction (axial direction), and a vertical direction (axial) of the hollow pipe 4. Direction) holding means attached to the top and balloon 6 as an inflating material.

  The reinforcing sheet 2 is formed into a tubular shape by stitching together sheet-like members woven with high-strength, high-modulus fibers, fiber materials such as synthetic fibers, or reinforcing fibers such as blended materials thereof, The upper and lower ends are formed in a sealed bag shape. The warp yarns of the reinforcing fibers of the reinforcing sheet 2 are arranged along the axial direction of the utility pole 100. The reinforcing sheet 2 is formed in a shape corresponding to the shape of the internal space of the utility pole 100, that is, has a length that is substantially the same as the combined length of the ground portion and the underground portion of the utility pole 100, and goes from the lower side to the upper side. Therefore, it has a tapered shape. The reinforcing sheet 2 is formed with a plurality of communication holes 8 that communicate with each other at intervals along the axial direction. These communication holes 8 are formed by not sewing a part of the sheet-like member. In each of the drawings, the communication hole 8 that is not actually sewn is shown as being formed or notched so that the position of the communication hole 8 can be easily understood.

  FIG. 2 is a partially enlarged cross-sectional view showing the inside of the upper part of the reinforcing material of the hollow columnar article according to the embodiment of the present invention. As shown in FIGS. 2 and 1, the hollow pipe 4 is made of a flexible material such as metal, polyvinyl chloride resin, or synthetic rubber, and the uppermost end of the hollow pipe 4 is the uppermost vertical direction of the reinforcing sheet 2. It is fixed inside the upper part. The hollow pipe 4 is configured to be divided into a plurality of pieces. In FIG. 1, the hollow pipe 4 is divided into three hollow pipes 4A, 4B, and 4C. A hose 4D made of a flexible material such as a synthetic resin sheet or a synthetic rubber sheet is connected to the lowermost end of the hollow pipe 4C located on the lowermost side. A plurality of through holes 10 are formed in the hollow pipes 4A to 4C and the hose 4D at predetermined intervals along the axial direction. Here, in the uppermost hollow pipe 4 </ b> A, the through hole 10 is not provided in a predetermined range above the balloon 6, and the through hole 10 is formed only in a region below the balloon 6. . Further, at the lowermost end of the hollow pipes 4A and 4B, a connecting screw portion 12 for connecting to the lower hollow pipes 4B and 4C is provided. A connecting pipe 13 having a branch pipe 13A is provided between the hollow pipe 4C and the hose 4D. The position of the communication hole 8 of the reinforcing sheet 2 is set so as to coincide with the position of the connecting screw portion 12 of the hollow pipe 4. Moreover, the length of the hollow pipe 4 is set to a length substantially matching the entire length of the reinforcing sheet 2 including the length of the hose 4D, and the reinforcing material 1 is installed in the utility pole 100. At this time, the lowermost end of the hollow pipe 4C is set so as to coincide with the height of the work hole 20 of the utility pole 100 described later.

  Here, as will be described later, the material of the hollow pipe 4 is flexible enough to allow the hollow pipe 4 to be inserted upward from a work hole formed in the utility pole 100 and strength capable of supporting the reinforcing sheet 2. It is desirable to be selected to have When inserting the hollow pipe 4, first, the hollow pipe 4A located at the uppermost position is inserted, and then the hollow pipe 4B is connected to the hollow pipe 4A to continue the insertion, and then the hollow pipe 4C is further connected. Further, since it is inserted into the electric pole 100, the material, shape, dimensions, etc. of the hollow pipe 4 are such that when only the hollow pipe 4A is inserted into the electric pole 100, when inserted into the electric pole 100 with the hollow pipes 4A and 4B connected, In addition, in consideration of the case where the hollow pipe 4A, 4B, 4C is connected and inserted into the electric pole 100, sufficient flexibility and strength can be secured so that the reinforcing sheet 2 can be lifted up to the upper part of the electric pole 100. Selected.

  The hollow pipe 4 is provided at the top in the vertical direction of the reinforcing sheet 2, and the top of the reinforcing sheet 2 in the vertical direction is such that the top end of the hollow pipe 4 coincides with the top end of the reinforcing sheet 2. The position below the uppermost end of the reinforcing sheet 2 is also included. In short, the top in the vertical direction of the reinforcing sheet 2 where the hollow pipe 4 is disposed means the position of the upper part of the reinforcing sheet 2 so that the portion above the hollow pipe 4 is held without sagging, When the hollow pipe 4 is also used for filling the filler, it means an upper position where the filler from the uppermost through hole can be filled with the filler up to the uppermost end of the reinforcing sheet 2.

  The balloon 6 is formed in a cylindrical bag shape from a material such as synthetic resin, synthetic fiber, and synthetic rubber, and is fixed to the outermost surface of the hollow pipe 4A inside the reinforcing sheet 2. The size of the balloon 6 is formed such that its outer surface is larger than the diameter of the uppermost part of the utility pole 100 in the expanded state. A tube 14 for injecting air into the inside is connected to the lower end of the balloon 6, and this tube 14 passes through one of the through holes 10 formed in the hollow pipe 4A and enters the inside of the hollow pipe 4A. Once entered, it goes out of the hollow pipe 4 </ b> A again through the through hole 10 below the through hole 10. Here, the material of the balloon 6 has such strength that the weight of the reinforcing material 1 can be held when the balloon 6 is inflated and the reinforcing sheet 2 is pressed against the inner wall of the utility pole 100 and fixed. A material that can withstand air pressure to ensure strength is selected.

Next, a method for reinforcing the electric pole 100 by installing the reinforcing member 1 of the hollow columnar object according to the embodiment of the present invention on the electric pole 100 will be described.
FIG. 3 is a diagram showing a state during conveyance of the hollow columnar reinforcing material 1 according to the embodiment of the present invention. Since the reinforcing material 1 has a length over the entire length of the utility pole 100, it is difficult to convey. Therefore, since the reinforcing sheet 2 of the present embodiment is formed in a cloth shape woven with fibers, it is folded back at a position below the hollow pipe 4A, and is folded to substantially the length of the hollow pipe 4A as shown in FIG. In this state, it is transported. Further, the hose 4D below the hollow pipe 4C is conveyed while being wound up while being connected to the hollow pipe 4C.

FIGS. 4-9 and FIGS. 11-13 are figures which show the method of reinforcing the utility pole 100 using the reinforcing material 1 of the hollow columnar thing concerning one Embodiment of this invention. In these drawings, the hollow pipe 4 and the balloon 6 are arranged inside the reinforcing sheet 2, but are shown by solid lines for easy understanding of the operation.
First, as shown in FIG. 4, an opening forming process is performed for forming a work hole 20 as an opening penetrating into the outer surface of the utility pole 100. The work hole 20 is formed in a long hole shape having a width of about 6 cm and a height of 30 cm, for example, at a position where an operator's hand can reach from the ground, for example, about 2 m from the ground.

  Next, as shown in FIG. 5, an insertion step of inserting the reinforcing material 1 from the work hole 20 is performed. At this time, the hollow pipe 4 is in a state where only the uppermost hollow pipe 4A is attached, and the balloon 6 is deflated. An operator holds the hollow pipe 4A from above the reinforcing sheet 2 and performs a push-up process of pushing the hollow pipe 4A upward. Since the uppermost end of the hollow pipe 4A contacts the inner wall of the utility pole 100 and the lowermost end is held by the operator, the hollow pipe 4A is pushed up together with the reinforcing sheet 2 in a bent state.

  When the reinforcing material 1 is inserted into the electric pole 100 to the lower end of the hollow pipe 4A, the hollow pipe 4B is inserted into the reinforcing sheet 2 from the communication hole 8 corresponding to the position of the lower end of the hollow pipe 4A in the reinforcing sheet 2 as shown in FIG. Then, a connecting step of connecting the hollow pipe 4A and the hollow pipe 4B with the connecting screw portion 12 is performed. Then, the hollow pipe 4 </ b> B is gripped from above the reinforcing sheet 2, and the reinforcing material 1 is further inserted upward into the utility pole 100.

  Thereafter, similarly, the hollow pipe 4C is connected to the hollow pipe 4B, and the reinforcing member 1 is further inserted upward into the utility pole 100, and the lower end of the hollow pipe 4C comes to the position of the work hole 20 as shown in FIG. When the reinforcing material 1 is inserted until the insertion process is finished. When the insertion step is finished, the lower end of the hollow pipe 4C is put on the lower end of the work hole 20 and the reinforcing material 1 is supported by the lower end of the work hole 20.

  Next, a holding step of holding the uppermost part of the reinforcing sheet 2 at a predetermined position in the utility pole 100 is performed. In this holding step, as shown in FIG. 7, the tube 14 is taken out of the utility pole 100 through the communication hole 8 and the work hole 20, and the compressor 22 and the pressure control instrument 23 are connected to the tube 14. Then, air is supplied from the compressor 22 to the balloon 6. When air is supplied to the balloon 6, the balloon 6 is inflated, and the hollow pipe 4 and the reinforcing sheet 2 are pushed outward and pressed against the inner wall of the utility pole 100 (expansion process). The reinforcing sheet 2 is held on the inner wall of the utility pole 100 by this pressing force. The holding force (fixing force) of the reinforcing sheet 2 is adjusted by monitoring the pressure with the pressure control instrument 23 and adjusting the air pressure in the balloon 6.

  When the reinforcing sheet 2 is fixed to the electric pole 100, the reinforcing sheet 2 below the hollow pipe 4C and the hose 4D below the hollow pipe 4C are dropped into the electric pole 100 from the work hole 20. Thereby, as shown in FIG. 8, the reinforcing material 1 is in a state where the uppermost end is fixed by the balloon 6 and is suspended inside the utility pole 100.

  Next, an injection process for injecting a filler into the reinforcing material 1 is performed. In the injection step, as shown in FIG. 9, the pipe 24 is connected to the branch pipe 13 </ b> A of the connecting pipe 13. The pipe 24 is fixed to the branch pipe 13A by being inserted into the branch pipe 13A. Connected to the pipe 24 are a hopper 26 that contains a filler such as a fluidized solidifying material, and a pump 28 that sends the filler in the hopper 26 to the pipe 24. At this time, the leakage prevention valve 30 is attached to the position of the work hole 20 so that the filler does not leak too much from the work hole 20.

  FIG. 10 is a view showing a leakage prevention valve 30 when a hollow columnar object is reinforced using a hollow columnar reinforcement according to an embodiment of the present invention. As shown in FIG. 10, the leakage prevention valve 30 includes a rectangular sheet-like portion 32, and a plurality of (four in the present embodiment) leakage prevention portions 34 provided on the sheet-like portion 32 at a predetermined interval. And a cylindrical portion 36 extending in a direction orthogonal to the sheet-like portion 32 from the approximate center of the sheet-like portion 32. The sheet-like portion 32 is made of the same material as that of the reinforcing sheet, and is formed in a size that completely covers the work hole 20. The leakage prevention part 34 is an elongated rod-like member made of a material having a certain degree of rigidity, such as metal or plastic, and is attached to the sheet-like member 32. The plurality of leakage prevention portions 34 provided in plural are provided on both sides of the cylindrical portion 36 by the same number (two in this embodiment) and are arranged in parallel to each other. The cylindrical portion 36 is provided so as to protrude from both surfaces of the sheet-like portion 32 so as to penetrate the sheet-like portion 32, and has a diameter larger than the diameter of the pipe 24.

  When the leakage prevention valve 30 is installed in the utility pole 100, the leakage prevention valve 30 is inserted into the utility pole 100 from the work hole 20 so that the leakage prevention portion 34 is not folded, and the pipe 24 is inserted into the cylindrical portion 36. The direction of the leakage prevention valve 30 is adjusted so that the longitudinal direction of the leakage prevention portion 34 is substantially orthogonal to the longitudinal direction of the work hole 20. In this state, the leakage prevention portion 34 contacts the inner wall of the utility pole 100 on both sides of the work hole 20, so that the leakage prevention valve 30 is prevented from coming out of the work hole 20.

  When the filler is supplied to the pipe 24 by the pump 28, the filler is injected into the electric pole 100 from the lowermost through hole 10 of the hose 4D, as shown in FIG. Thereafter, when the filling height of the filler is increased to cover the lowermost through hole 10 of the hose 4D, the filler is injected from the through hole 10 above the through hole 10 this time. Thus, the filler is filled in order from the bottom through the through-hole 10, and when the filler reaches just below the balloon 6 as shown in FIG. 12, the pump 28 is stopped to stop the filling of the filler. The filling height of the filling material is calculated by calculating the volume of the filling material filled in the reinforcing sheet 2 or visually observing moisture exuding from a ground hole or the like provided in advance in the utility pole 100. It can be generally confirmed by.

  Next, a fixing release step of releasing the air pressure of the balloon 6 and releasing the fixation of the reinforcing sheet 2 by the balloon 6 is performed. In this unlocking step, the air valve in the pressure control instrument 23 is opened to release the air pressure to the atmosphere. Air is released through the tube 14, and the balloon 6 is deflated as shown in FIG. In this state, since most of the lower portion of the reinforcing sheet 2 is filled with the filler, the reinforcing sheet 2 is held on the inner surface of the electric pole 100 by the filler even if the fixation by the balloon 6 is released.

  Thereafter, the pump 28 is restarted to refill the filler. Since the through hole 10 is not formed in the upper part of the hollow pipe 4A and the upper end is also sealed, the filler is injected from the through hole 10 covered with the filler and filled up to the upper part of the utility pole 100. It will be. While filling the filler, an air pressure monitoring process is performed in which the pressure is monitored by the pressure control instrument 23. When the filler reaches the balloon 6 and crushes the balloon 6, a small amount of air remaining inside the balloon 6 is pushed out, and the pressure measured by the pressure control instrument 23 increases. When the operator confirms the increase in pressure, the operator can confirm that the filler has reached the point where the balloon 6 is crushed, that is, the filler has reached the top of the filler 1. An injection end process for stopping and stopping the supply of the filler is performed. Thereafter, the pipe 24 is pulled out from the branch pipe 13A. Then, as shown in FIG. 13, the cylindrical portion 36 of the leakage prevention valve 30 is crushed by the pressure of the filler and closes the opening, so that backflow of the filler is prevented at the cylindrical portion 36. Thereafter, the work hole 20 is closed and the filler 1 is cured by a treatment such as leaving it for a predetermined time, and the reinforcing work is finished.

According to the present embodiment configured as described above, the following excellent effects can be obtained.
Since the plurality of through holes 10 are provided in the hollow pipe 4 at a predetermined interval, the filler can be filled in order from the bottom. Therefore, since it is not necessary to perform filling of the filler from the upper end of the utility pole 100 as in the prior art, the filling operation can be made simple and safe, and the filling pressure required for filling is greatly reduced. be able to. Thereby, it can avoid that the installation required for filling becomes a big thing.

  Since the reinforcing material 1 includes the flexible reinforcing sheet 2 and the flexible hollow pipe 4, the reinforcing material 1 is directed upward into the electric pole 100 using the hollow pipe 4 used for filling the filler. Can be inserted. For this reason, the work hole 20 can be provided near the ground of the utility pole 100, and the reinforcement work can be performed from the work hole 20, so that the work that had to be performed at a conventional high place becomes unnecessary, and the reinforcement work can be performed easily and easily. It can be done safely.

Since the hollow pipe 4 is divided into a plurality of hollow pipes 4A to 4C, the hollow pipe 4 can be divided and the reinforcing sheet 2 can be folded and conveyed when the reinforcing material 1 is conveyed. Therefore, it is possible to easily perform the transfer work and to significantly improve the transfer cost.
Since the hollow pipe 4 is divided into a plurality of pieces, when the reinforcing member 1 is installed in the utility pole 100, the reinforcing member 1 is placed in the utility pole 100 while the hollow pipe 4B is connected to the divided hollow pipe 4A. Can be inserted into. Therefore, even when the reinforcing material 1 is inserted, it is not necessary to handle a long hollow pipe extending over several meters, the space for inserting the reinforcing material 1 can be reduced, and the inserting work can be easily performed.

  Since the reinforcing sheet 2 can be held when the balloon 6 is inflated with air, the reinforcing material 1 can be fixed in the utility pole 100 by a simple operation of air supply. Further, since the reinforcing sheet 2 is fixed by inflating the balloon 6 by injecting air, the fixing force of the reinforcing sheet 2 can be known from the air pressure in the balloon 6. Therefore, by managing the air pressure, a sufficient fixing force of the balloon 6 can be secured, and the reinforcing sheet 2 can be reliably held in the utility pole 100.

  Since the upper and lower ends of the reinforcing sheet 2 are sealed, when the filler is filled, pressure is applied to the entire reinforcing sheet 2 from the inside to the outside, and the reinforcing sheet 2 is pressed against the inner wall of the utility pole 100. The reinforcing force can be ensured reliably. Moreover, since the upper and lower ends of the reinforcing sheet 2 are sealed, it is possible to specify the range to be reinforced and to grasp the filling amount of the filler. Therefore, for example, when it is desired to reinforce only a part of the entire length of the utility pole 100, partial reinforcement is also possible by using a reinforcing sheet shorter than the overall length of the utility pole 100 with the upper and lower ends sealed.

The present invention is not limited to the embodiment described above, and may be, for example, as follows.
In the embodiment, the balloon 6 is inflated at the uppermost end of the reinforcing sheet 2 and fixed to the utility pole 100. However, the place where the holding means such as a balloon holds the reinforcing sheet is not limited to the uppermost part of the reinforcing sheet, It is only necessary that the reinforcing sheet is positioned at an upper part so that the reinforcing sheet cannot be held in an upright position and does not hang down, and may be positioned above the longitudinal center of the reinforcing sheet. Further, the holding means does not necessarily have to hold the upper part of the reinforcing sheet. Furthermore, the means for holding the reinforcing sheet at a predetermined position in the hollow columnar object is not limited to pressing the reinforcing sheet against the inner surface of the hollow columnar object with a balloon as in the above embodiment, but a mechanical member of the hollow columnar object. Arbitrary forms such as those that urge from the inside to the outside and fix the reinforcing sheet with the urging force, and those that hold the reinforcing sheet in place through the hollow pipe by fixing the hollow pipe in place Can be adopted.

  In the embodiment, the means for confirming whether or not the filler is filled up to the uppermost end of the reinforcing sheet has been performed by confirming that the air pressure of the balloon has increased. The filling amount of the filler may be determined in consideration of the internal volume, or the filling height of the filler may be confirmed visually or by a sensor.

  In the above embodiment, the hollow pipe is used as a rod-shaped member for lifting the reinforcing sheet upward from the bottom and installing it in the hollow columnar object in addition to the pipe for filling the filler. However, the hollow pipe may be used as a pipe only for filling the filler. In this case, the hollow pipe does not necessarily have flexibility and sufficient strength to lift the reinforcing sheet to a predetermined position of the hollow columnar object. When the reinforcing sheet is installed in the hollow columnar object, the reinforcing sheet may be installed in the hollow columnar object by using another method such as using a pulley.

The hollow pipe may not be divided into a plurality of pipes. In that case, the filling material may be injected using a single hollow pipe, and the divided hollow pipes do not need to be connected to each other.
In the above-described embodiment, the hollow pipe is fixed to the reinforcing sheet at the uppermost portion of the reinforcing sheet. However, the hollow pipe is not limited thereto, and may be simply disposed without being fixed to the uppermost portion of the reinforcing sheet.

  In the above-described embodiment, the upper and lower ends of the cylindrical reinforcing sheet are sealed. However, the cylindrical reinforcing sheet is not limited thereto, and may be formed in a cylindrical shape with the upper and lower ends open, for example. Moreover, it is not restricted to what both upper and lower ends are open | released, for example, at least a lower end may be sealed or at least an upper end may be sealed.

  The hollow columnar body is not limited to a utility pole, and may be a structure that is hollow and requires reinforcement, such as a viaduct pillar or a pier structure.

DESCRIPTION OF SYMBOLS 1 Reinforcement material 2 Reinforcement sheet 4 Hollow pipe 6 Balloon (expansion material, holding means)
10 Through hole 20 Working hole (opening)

Claims (10)

A reinforcing material for a hollow columnar material,
A reinforcing sheet made of fiber material and formed into a cylindrical shape;
A bag-like inflatable material provided on one end side of the inside of the reinforcing sheet, and holding the reinforcing sheet in a predetermined position in the hollow columnar object from the inside by expanding;
A tube for injecting air into the expansion material;
A hollow pipe provided inside the reinforcing sheet and outside the expansion material, and having a through-hole for injecting mortar into the reinforcing sheet.
A reinforcing material for a hollow columnar article. The through hole is formed in a region of the hollow pipe where the expansion material is not provided.
The reinforcing material for a hollow columnar object according to claim 1. The hollow columnar object is arranged in a vertical direction,
The said hollow pipe is a reinforcement material of the hollow columnar object of Claim 1 or 2 which has sufficient intensity | strength to lift the said reinforcement sheet | seat to the predetermined position of the said hollow columnar object while having flexibility.   The reinforcing material of the hollow columnar object according to any one of claims 1 to 3, wherein the reinforcing sheet is sealed at an upper end and a lower end.   The said hollow pipe is a reinforcing material of the hollow columnar object of any one of Claim 1 to 4 comprised by the some hollow pipe part.   The reinforcing material for a hollow columnar object according to any one of claims 1 to 5, wherein a pressure control instrument arranged outside the hollow columnar object is connected to the expansion material. A method for reinforcing a hollow columnar object,
An arrangement step of arranging a reinforcing sheet formed in a cylindrical shape inside the hollow columnar object,
A holding step of inflating a bag-like expansion material provided on one end of the inside of the reinforcing sheet and holding the reinforcing sheet at a predetermined position in the hollow columnar object;
An injection step of injecting mortar from a through hole formed in a hollow pipe disposed inside the reinforcing sheet to the inside of the reinforcing sheet and the outside of the expansion material ,
A method for reinforcing a hollow columnar article. The hollow columnar object is arranged in a vertical direction,
The method includes an opening forming step of forming an opening below the center in the vertical direction of the hollow columnar before the arranging step,
The said arrangement | positioning process is a reinforcement method of the hollow columnar thing of Claim 7 which pushes up the said reinforcement sheet | seat upwards with the said hollow pipe from the said opening part, and arrange | positions it inside the said hollow columnar thing.   The arranging step includes a pushing-up step of pushing up the reinforcing sheet upward in the hollow columnar object using the first hollow pipe portion of the hollow pipes constituted by a plurality of hollow pipe portions; Connecting a second hollow pipe portion to the lower end of the hollow pipe portion, and repeating the push-up step and the connecting step with respect to the other hollow pipe portions to thereby form a plurality of the hollow pipe portions. The method for reinforcing a hollow columnar object according to claim 8, wherein the reinforcing sheet is pushed up to an upper part of the hollow columnar object while being sequentially connected. The injection step includes a step of releasing the pressure of the air inside the expansion material to release the fixation of the reinforcement sheet to the inner surface of the hollow columnar material before the filler is filled up to the upper end of the reinforcement sheet. When,
An air pressure monitoring step of monitoring the air pressure inside the inflatable material while continuing to fill with the filler after the unlocking step;
An injection end step of determining that the filler has reached the expansion material when the air pressure monitored in the air pressure monitoring step has increased, and terminating the injection of the filler.
The method for reinforcing a hollow columnar object according to any one of claims 7 to 9.

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