JP5964730B2 - Formwork and reinforcement for reinforcing hollow pillars - Google Patents

Description

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

  Conventionally, when hollow columnar objects such as utility poles and earth pipes are reinforced, as described in, for example, Patent Document 1, a bag body is installed inside and a fluid solidifying material such as cement is filled inside the bag body There is something to do. In the reinforcing method described in Patent Document 1, a bag body is installed in the vicinity of the boundary between the ground part and the underground part of the utility pole, and a fluidized solidifying material is injected into the bag body.

JP 2006-316403 A

However, in the conventional reinforcing method as described above, since the fluidized solidifying material such as mortar is filled inside the hollow portion of the electric pole to make it solid, the entire weight of the electric pole becomes heavy. For example, when only the upper part of the utility pole is to be reinforced, if only the upper part is filled with the fluidized solidifying material, the weight of the utility pole is biased, the balance of the entire utility pole is deteriorated, and effective reinforcement cannot be performed.
An object of the present invention is to provide a reinforcing mold that can effectively reinforce the hollow columnar material without increasing the weight of the hollow columnar material, and a reinforcing material for the hollow columnar object using the mold. .

  In order to achieve the above-mentioned object, a form for reinforcing a hollow columnar article of the present invention has an outer film and an inner film, and is a bag-like and tubular form body that can be filled with air, A filling pipe that is connected to the inside of the mold body and conveys the filler filled in the hollow columnar body, and a joining portion in which the outer film and the inner film are coupled to each other is formed on the mold body. Formed along the axial direction of the frame body, the outer peripheral surface of the filling pipe is joined to the mold body at the joint, and the filling pipe and the joint are formed with through holes that penetrate the filling pipe and the joint. It is characterized by that.

  In this invention comprised in this way, a cylindrical space is ensured by arrange | positioning a formwork in a hollow columnar thing, inject | pouring and inflating air in a formwork main body. Thereafter, the hollow columnar material is reinforced by filling the hollow columnar material with the filler through the filling pipe. In the present invention, since the mold body that can be expanded in a cylindrical shape is disposed in the hollow columnar object, the hollow columnar object is filled with the filler in a cylindrical shape. Therefore, the weight of the reinforcing portion of the hollow columnar object can be reduced, and effective reinforcement is possible.

  Conventionally, since the filling pipe is often embedded in the filling material, the filling material is not filled by the volume of the filling pipe, and there is a possibility that the strength of the filling material at that portion is reduced. In the present invention, since the filling pipe is not embedded in the filler, a reinforcing layer having a predetermined thickness is formed, and a reduction in strength of the reinforcing layer due to the filling pipe is prevented.

  Furthermore, in the present invention, since the outer peripheral surface of the filling pipe is connected to the mold body at the joint portion where the outer film and the inner film are joined to each other, it is possible to form a filling hole through the joint portion. It becomes. Therefore, the degree of freedom of the formation position of the filling hole is increased, and it is also possible to form a plurality of filling holes, so that clogging of the filling material is prevented, the filling pressure of the filling material is reduced, and the filling is performed. Pipe breakage is prevented.

In the present invention, preferably, a radially extending blade is formed on the outer periphery of the outer film of the mold body.
In the present invention configured as described above, when the mold body is expanded with air, the blade is pressed against the inner wall of the hollow columnar body, and the mold frame is held at a predetermined position in the hollow columnar body. Therefore, a special support tool is not required separately, so that the work for installing the mold is simplified.

In order to achieve the above object, the hollow columnar reinforcing material of the present invention is disposed so as to surround the above-mentioned mold frame and at least the mold body, and can be filled with a filler. And material.
In the present invention configured as described above, when the reinforcing material is disposed in the hollow columnar body, the mold body is filled with air to expand the mold body, and then the reinforcing material is filled with the filler. The reinforcing material is fixed in close contact with the inner wall of the hollow columnar body while expanding. Since the mold body is provided inside the reinforcing material, the filler in the reinforcing material is formed in a cylindrical shape. Therefore, the weight of the reinforcing portion of the hollow columnar object can be reduced. In addition, since the reinforcing material is disposed between the filler and the inner wall of the hollow columnar object, the reinforcing strength of the hollow columnar object is improved.

It is a whole perspective view which shows the formwork for reinforcement of the hollow columnar thing concerning 1st Embodiment of this invention. It is an expanded view of the formwork main body of the formwork for reinforcement of the hollow columnar thing concerning 1st Embodiment of this invention. It is a cross-sectional view along the II-II line of FIG. It is a figure which shows the installation method of the formwork for reinforcement of the hollow columnar object concerning 1st Embodiment of this invention. It is a cross-sectional view which shows the expanded state of the form for reinforcement of the hollow columnar object concerning 1st Embodiment of this invention. It is a figure which shows the installation method of the formwork for reinforcement of the hollow columnar object concerning 1st Embodiment of this invention. It is a fragmentary sectional view which shows the formwork for reinforcement of the hollow columnar thing concerning 2nd Embodiment of this invention. It is a figure which shows the installation method of the formwork for reinforcement of the hollow columnar thing concerning 2nd Embodiment of this invention.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the second and subsequent embodiments, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and description thereof will be simplified or omitted.

[First Embodiment]
The form for reinforcement of the hollow columnar object according to the first embodiment of the present invention will be described. In the present embodiment, a power pole is adopted as the hollow columnar body, and a power pole reinforcing form and a power pole reinforcing method using the form will be described.

  FIG. 1 is an overall perspective view of a form 1 for reinforcing an electric pole according to a first embodiment of the present invention. As shown in FIG. 1, a mold 1 includes a cylindrical and bag-shaped mold body 2, a viscous fluid such as cement, grout, and slurry that is connected to the mold body 2 and outside the mold body 2. A filling pipe 4 for transporting the filler into the electric pole and discharging it into the electric pole, and a holder 6 for holding the mold body 2 at a predetermined position in the electric pole.

  FIG. 2 is a development view of the mold body 2 according to the first embodiment of the present invention. The mold body 2 has a rectangular outer film 8 positioned outside the cylindrical shape, and a rectangular inner film 10 positioned inside the outer film 8, and the outer film 8 and the inner film 10 The outer edges are formed in a bag shape joined together by adhesion, welding or the like. In the unfolded state of the bag-shaped mold body 2 shown in FIG. 2, coupling portions 12 and 14, which are joining margins in which the outer film 8 and the inner film 10 are coupled to each other, are formed at both ends of the rectangular width direction. ing. The mold body 2 is formed in a cylindrical shape by overlapping and coupling the coupling portions 12 and 14 of the unfolded mold body 2 shown in FIG. A check valve 16 for preventing the outflow of air from the inside is attached to the center of the lower end in the width direction in the deployed state of the mold body 2.

FIG. 3 is a cross-sectional view of the mold 1 taken along the line II-II in FIG. As shown in FIG. 3 and FIG. 1, the filling pipe 4 is arranged along the direction of the axis X of the mold body 2, and the filling pipe 4 is disposed inside the coupling portions 12 and 14 that are overlapped and joined to each other. The outer surfaces are joined by adhesion, welding or the like. In the region where the filling pipe 4 and the coupling portions 12 and 14 are joined to each other, a plurality of filling holes (through holes) 18 penetrating the filling pipe 4 and the coupling portions 12 and 14 are equally spaced along the direction of the axis X. Individually formed.
The filling pipe is provided with a connecting pipe 20 for connecting the hose through the coupling parts 12 and 14.

  As shown in FIG. 1, the holder 6 includes an annular bracket 22 attached to the outer periphery of the outer film 8 of the mold body 2 and a plurality of blades extending radially (radially) from the bracket 22 at equal intervals. 24. The dimension L in the radial direction of the blade 24 is set to a dimension corresponding to the thickness of the filler filled inside the electric pole to be reinforced.

Next, a method for reinforcing the utility pole 100 using the mold 1 having such a structure will be described.
4 to 6 show a method for installing the mold 1 according to the first embodiment of the present invention. First, as shown in FIG. 4, the working hole 102 is formed on the side surface of the utility pole 100. An air hose 104 for connecting an air supply device (not shown) is connected to the check valve 16 of the mold 1, and the mold 1 is inserted into the utility pole 100.

  In the present embodiment, the work hole 102 is formed at a predetermined height from the ground G so that the work can be easily performed, and the mold 1 is disposed above and below the work hole 102. Moreover, in this embodiment, it shall reinforce from the bottom inside the utility pole 100 to the upper end of the formwork 1 positioned.

In a state where the mold 1 is positioned in the electric pole 100, air is supplied from the air hose 104 to the inside of the mold body 2 to expand the mold body 2. At this time, as shown in FIG. 5, in the mold body 2, the inner film 10 expands toward the center of the cylinder and becomes a substantially circular cross section. The filling pipe 4 is pushed by the inner film 10 expanded by air pressure, and is sandwiched and fixed between the coupling portions 12 and 14 and the inner film 10.
As the formwork body 2 expands into a cylindrical shape, the blade 24 of the holder 6 moves outward, and the tip of the blade 24 is pressed against the inner wall of the utility pole 100. Thereby, the formwork 1 is hold | maintained in the utility pole 100. FIG. After the mold body 2 is expanded, the connection between the check valve 16 and the air hose 104 is released, and the air hose 104 is removed from the utility pole 100.

  Next, as shown in FIG. 6, a filler supply device (not shown) is connected to the connection pipe 20 through the work hole 102 via a filling hose 106. When the filler 108 is supplied from the filling hose 106, the filler 108 flows out from the plurality of filling holes 18 into the electric pole 100 through the inside of the filling pipe 4. The filler 108 flows out to the outside of the mold 1 inside the utility pole 100 and is filled from the bottom inside the utility pole 100 to the upper end of the mold 1. At this time, the work hole 102 is closed from the inside of the utility pole 100 with a lid 110 or the like.

  After the filling material 108 is filled, the filling hose 106 is removed, the work hole 102 is closed, and the reinforcement of the utility pole 100 is finished.

According to the present embodiment configured as described above, the following excellent effects can be obtained.
Since the formwork 1 is formed in a cylindrical shape and a bag shape, the inside of the utility pole 100 can be reinforced in a cylindrical shape by filling the filler 108. Therefore, the weight of the reinforcing portion of the utility pole 100 can be reduced, and a more reliable reinforcing effect can be obtained. In particular, when the reinforcing part of the utility pole 100 is the upper part of the utility pole 100, the reinforcement can be performed without breaking the balance of the weight of the utility pole 100.

  Since the filling pipe 4 is disposed inside the mold body 2, the filling pipe 4 is not embedded in the filling material 108. Accordingly, it is possible to prevent a reduction in reinforcement strength due to the filling pipe 4 being disposed in the filler 108.

Since the outer peripheral surface of the filling pipe 4 is joined to the coupling portions 12 and 14, the filling hole 18 can be formed without penetrating the inside of the mold body 2. As a form that the applicant has developed in the past, there is a form in which a filling pipe is penetrated through a bag-like form body. In such a structure, the filling hole is formed on the form body of the filling pipe. It can be formed only on the part protruding outward.
On the other hand, in the mold 1 of this embodiment, since the filling holes 18 can be formed in the coupling portions 12 and 14, a plurality of filling holes 18 are provided along the axis X direction of the mold body 2. Can do. As described above, by joining the filling pipe 4 to the coupling portions 12 and 14, the degree of freedom of the formation position of the filling hole 18 can be increased. Further, by providing a plurality of filling holes 18 in the direction of the axis X, the filling pressure of the filling material 108 can be reduced and the damage of the filling pipe 4 can be prevented as compared with the structure of the conventional filling pipe. it can.

  Since the holder 6 having the blade 24 is provided on the mold body 2, the mold body 2 can be positioned at a predetermined position in the utility pole 100 by the blade 24. Therefore, an apparatus for temporarily fixing the mold 1 is not necessary, and the work process can be simplified. In addition, since the mold body 2 is expanded so that the blade 24 holds the mold 1, the mold body 2 can be expanded to a predetermined distance L from the inner wall of the utility pole 100. Therefore, since the filler 108 can be filled with a predetermined thickness (that is, a thickness corresponding to the predetermined distance L), a stable reinforcing strength can be ensured.

[Second Embodiment]
Next, the reinforcing pole form for the electric pole according to the second embodiment of the present invention will be described. In this embodiment, the same formwork as the formwork 1 according to the first embodiment is used as part of the reinforcing material for the utility pole.
FIG. 7 shows a reinforcing member 30 for a utility pole according to a second embodiment of the present invention. As shown in FIG. 7, the reinforcing member 30 includes a mold frame 40 having the same structure as that of the first embodiment, and a reinforcing material 32 disposed outside the mold frame 1.

  The mold 40 has the same structure as the mold 1 according to the first embodiment except that the holder 6 of the mold 1 according to the first embodiment is not provided. Therefore, the mold 40 includes a mold body 42, a filling pipe 44 connected to the mold body 42, a plurality of filling holes 46 that pass through the filling pipe 44 and the joint portion 43 of the mold body 42, and the mold And a check valve 48 provided at the lower end of the main body 42.

  The reinforcing material 32 is a cloth-like material in which warp and weft are knitted, and is a high-strength, high-modulus fiber (tensile strength is 2000 MPa or more, tensile elastic modulus is 50 GPa or more), a fiber material such as synthetic fiber, or a blend of these Material can be used. The reinforcing material 32 is knitted so as to have a stitch size that allows moisture to pass but does not allow the material filled in the reinforcing material 30 to pass through. The reinforcing material 32 is provided so that the warp is arranged along the direction of the axis X.

The reinforcing material 32 is formed in a cylindrical shape, and the upper end and the lower end thereof are fixed around the filling pipe 44 of the mold 40. Therefore, the reinforcing material 32 surrounds the mold 1 except for the upper and lower ends of the filling pipe 4. Leakage of the filler is prevented between the reinforcing material 32 and the filling pipe 44. Further, the filling pipe 44 of the mold 40 is provided with a connection pipe 50 that penetrates the reinforcing material 32. The filler is prevented from leaking between the reinforcing material 32 and the connection pipe 50.
One end of an air hose 34 for supplying air is connected to the check valve 48 at the lower end of the mold body 42, and the other end of the air hose 34 is interposed between the filling pipe 44 and the reinforcing material 32. It is exposed to the outside.

A method of reinforcing the utility pole 200 using the reinforcing member 30 having such a structure will be described.
FIG. 8 is a diagram illustrating a method of reinforcing the utility pole 100 using the reinforcing member 30 according to the second embodiment of the present invention. First, the work hole 202 is formed at an appropriate position of the utility pole 200. Moreover, the installation pipe 204 is connected to the upper and lower ends of the filling pipe 44 of the reinforcing member 30 in the same manner as the mold 1 according to the first embodiment. An air supply device is connected to the air hose 34 via the hose. Then, the installation pipe 204 to which the reinforcing material 30 is connected is inserted from the work hole 202, and the installation pipe 204 is stood against the inside of the utility pole 200, thereby arranging the reinforcing material 30 at a predetermined position.

Next, air is supplied from the air supply device into the mold body 42 via the air hose 34 to expand the mold body 42. After the mold body 42 is expanded, the hose connected to the air hose 34 is removed, and this time, a filler supply device (not shown) is connected to the connection pipe 50. When the filler 208 is supplied from the filler supply device, the filler 208 flows out of the filler hole 46 into the reinforcing material 32 through the filler pipe 44. The inflow of the filler 208 causes the reinforcing material 32 to expand, and the outer surface thereof adheres to the inner wall of the utility pole 200 and is fixed. Moisture contained in the filler 208 oozes through the reinforcing material 32 and is discharged to the outside of the reinforcing material 30.
After filling with the filler 108, the work hole 202 is closed, and the reinforcing work of the utility pole 200 is completed.

According to the reinforcing member 30 according to the second embodiment as described above, the following effects can be obtained.
Since the reinforcing material 30 has the reinforcing material 32, the reinforcing material 32 is filled with the filler 208 to expand the reinforcing material 32 and perform reinforcement. Therefore, in addition to reinforcement by the filler 208, reinforcement by the reinforcement material 32 is also performed, so that the reinforcement strength can be improved.
Moreover, since the filler 208 is filled in the reinforcing material 32, for example, a part of the upper part of the utility pole 200 can be reinforced.

  Since the reinforcing material 32 is formed with a stitch that allows moisture to pass therethrough but does not allow the filler 208 to pass therethrough, only moisture penetrates to the outside of the reinforcing material 32 as the filler 208 is filled. Normally, fillers such as cement and grout need to be mixed with water to ensure fluidity. On the other hand, when the water content of the filler is large, a dense structure is not obtained, and thus the mixed water needs to be discharged to some extent. In the present embodiment, since the moisture of the filler is discharged to the outside of the reinforcing material 30 through the reinforcing material 32 in the filling process, the filler can have a dense structure.

The present invention is not limited to the embodiment described above, and may be, for example, as follows.
In the above-described embodiment, the formwork is arranged over the upper side and the lower side of the work hole. However, for example, when reinforcing only the upper part of the utility pole, the formwork may be arranged above or below the work hole. In that case, after filling and curing the filler, the mold can be peeled off.

  In the above-described embodiment, the joining portion uses the joining allowance when forming the outer film and the inner film into a bag shape. However, the joining portion is not limited to this. For example, the upper end and the lower end of the tubular outer film and the inner film are joined. Then, the mold body may be formed, and the joining portion may be formed by joining the outer film and the inner film to each other at an arbitrary position.

The method is not limited to the method of installing the formwork or the reinforcing material at a predetermined position in the power pole by standing the installation pipe inside the power pole. For example, a balloon is attached to the upper end of the formwork or the reinforcing material, and the balloon is inflated in the power pole. Thus, the formwork or the reinforcing material may be held at a predetermined position.
The formwork and the reinforcing material of the present invention are not limited to electric poles, and can be applied to hollow pillars that are hollow and require reinforcement, such as viaduct pillars and pier structures.

  In the second embodiment described above, the reinforcing material surrounds the formwork except for the upper and lower ends of the filling pipe. However, the present invention is not limited to this, and may surround the entire formwork. In short, the reinforcing material is at least the formwork body. Should be enclosed.

1,40 Formwork 2,42 Formwork body 4,44 Filling pipe 6 Holder 12, 14, 46 Joining part 16, 48 Check valve 18 Filling hole (through hole)
24 Braid 30 Reinforcing material 32 Reinforcing material 100, 200 Utility pole

Claims (3)

A mold for reinforcing a hollow columnar object,
A bag-shaped and cylindrical mold body that has an outer film and an inner film and can be filled with air; and
A filling pipe connected to the inside of the mold body and for transporting a filler filled in a hollow columnar material,
In the mold body, a coupling portion in which the outer film and the inner film are bonded to each other is formed along the axial direction of the mold body,
The outer peripheral surface of the filling pipe is connected to the mold body at the joint,
The filling pipe and the coupling part are formed with through holes penetrating the filling pipe and the coupling part,
A form for reinforcing a hollow columnar material. On the outer periphery of the outer film of the mold body, a blade extending in the radial direction is formed.
The mold according to claim 1. The mold according to claim 1 or 2,
A reinforcing material that is disposed so as to surround the formwork except for the upper and lower ends of the filling pipe, and has a reinforcing material that can be filled with a filler inside.
A reinforcing material for a hollow columnar article.

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