Replacement method of power pole at original position, connecting tool, and substructure

Abstract

To provide a replacement method of power pole at the original position, a connecting tool, and a substructure by which operation can be completed in a short time, and feasibility is hardly affected by states of ground around an existing power pole.SOLUTION: A replacement method of power pole at the original position 1 has a step S1 of substructure installation process, a step S2 of temporary power pole installation process, a step S3 of a first transfer process, a step S4 of existing power pole removal process, a step S5 of new construction power pole final installation process, a step S6 of a second transfer process, and a step S7 of temporary power pole removal process.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a utility pole original position replacement method, a connector, and a foundation structure for replacing an existing utility pole with a new utility pole at the original position of the existing utility pole. [Background technology]

[0002] Traditionally, when replacing an existing utility pole with a new one, the new pole is typically erected in a new location different from the original location of the existing utility pole. However, in urban areas, for example, it may not be possible to secure an appropriate new location due to the condition of the surrounding land (ditches, fences, trees, parking within residential areas, etc.). In such cases, land is rented for a certain period of time to use as a temporary location, a temporary utility pole is erected in this temporary location, and the electric wires and other components are relocated. The existing utility pole is then removed, and a new utility pole is erected in the vacant original location, with the electric wires and other components relocated from the temporary utility pole. However, the conventional method requires construction to excavate the temporary location, and if there are buried objects such as water pipes, it is necessary to prepare a consultation procedure document with the buried object manager and for the buried object manager to be present on-site, which takes a lot of time. Furthermore, if excavation work is impossible due to buried objects, another temporary location must be found, which means starting over from the beginning, which increases the workload and time required. To solve this problem, technology has been developed in recent years that allows new utility poles to be erected at the original positions of existing utility poles, and inventions relating to this technology have already been disclosed.

[0003] Patent document 1 discloses an invention entitled "Temporary relocation tool for overhead line equipment for replacing utility pole original hole and utility pole original hole replacement method" that relates to a temporary relocation tool and replacement method for removing an existing utility pole and erecting a new utility pole in the same location. The temporary overhead line relocation tool for replacing the original hole of a utility pole disclosed in Patent Document 1 is characterized by having a support base, a temporary pole body supported by the support base and arranged to stand up vertically, a support weight placed on the support base, a support arm having one end detachably attached to the temporary pole body so as to extend horizontally from the temporary pole body, a bow support wire arm attached to the temporary pole body so as to extend horizontally on both the left and right sides of the temporary pole body, a pair of bow support wires having one end fixed to the temporary pole body above the bow support wire arm and each hanging downward via the end of the bow support wire arm on a different side, and a pair of vibration-stopping weights suspended from the tip of each bow support wire.

[0004] The utility pole original hole replacement method disclosed in Patent Document 1 includes a wire removal and transfer process in which the overhead wires are removed from the existing utility pole and transferred to a support arm, a temporary pole installation process in which a temporary pole body is erected on a support stand alongside the existing utility pole, a support weight is placed on the support stand, bow-branch wire arms are attached to the temporary pole body, one end of each bow-branch wire is fixed to the temporary pole body above the bow-branch wire arms, and each vibration-stopping weight is hung from the tip of each bow-branch wire, and one end of the support arm is attached to the temporary pole body. After fixing, the method comprises an arm relocation process for removing the other end of the support arm from the existing utility pole, a utility pole removal process for removing the existing utility pole, a new utility pole installation process for erecting a new utility pole in the same location as the existing utility pole, an overhead line installation and movement process for removing the overhead lines from the support arm and moving them to the new utility pole, and a temporary pole removal process for removing each vibration-proof weight, each bow support line, bow support line arm, support arm, support weight, temporary pole body, and support stand. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-204642 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the invention disclosed in Patent Document 1, the temporary structure is supported by a variety of components, such as vibration-proof weights, bow support wires, and bow support wire arms, and assembling and removing these components is likely to be time-consuming. In this case, the temporary pillar installation and removal processes also require time. In addition, installing temporary poles requires land for the installation of support bases and support weights, but if there are obstacles such as ditches or fences around the existing utility poles, it is difficult to install support bases, etc. Therefore, in the invention disclosed in Patent Document 1, since the temporary main body cannot be erected, there is a risk that it may be difficult to erect a new utility pole in the same position as an existing utility pole.

[0007] The present invention has been made in response to the above-mentioned conventional circumstances, and aims to provide a method for replacing an electric pole at its original position, a connector, and a foundation structure that can complete the work in a short time by reducing the effort required to carry out each process, and whose feasibility is less affected by the condition of the land around the existing electric pole. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, a first invention is a method for replacing an existing utility pole with a new utility pole at its original position, the method comprising: a temporary utility pole installation step of installing a temporary utility pole in a temporary position adjacent to the original position where the existing utility pole is installed, using a connector that connects the existing utility pole to the temporary utility pole and supports the temporary utility pole; a first relocation step of transferring the overhead wires held on the existing utility pole to the temporary utility pole so as to hold them thereon; an existing utility pole removal step of removing the existing utility pole from its original position; a new utility pole permanent installation step of permanently installing a new utility pole in the original position from which the existing utility pole was removed; a second relocation step of transferring the overhead wires held on the temporary utility pole to the new utility pole so as to hold them thereon; and a temporary utility pole removal step of removing the temporary utility pole and the connector.

[0009] In the invention configured as described above, the original position refers to the ground position where the existing utility pole is installed. It is also conceivable that the connector is installed directly on the ground at the original position where the existing utility pole is installed to support the temporary utility pole. In this case, the connector may or may not be buried in the ground at the original position. Furthermore, the connector may be attached to a structure supporting the base end of an existing utility pole to support a temporary utility pole, assuming that the structure supporting the base end of the existing utility pole is installed on the ground in its original position. Alternatively, the connector may be directly installed in the ground at the original position and in the ground at the temporary position to support the temporary utility pole, in which case the connector does not need to be buried in the ground at the temporary position. In other words, in either of the above cases, the connector is not supported only by the existing utility pole.

[0010] Therefore, in the temporary utility pole installation process, the temporary utility pole is installed via a connector without being buried in the ground at the temporary position. Furthermore, in the process of removing the existing utility pole, the connector is not supported only by the existing utility pole, so even when the existing utility pole is removed from its original position, the temporary utility pole remains supported by the connector. Furthermore, in the temporary utility pole removal process, the temporary utility pole and the connector are removed, and the existing utility pole is replaced with a new utility pole at its original position.

[0011] The second invention is characterized in that, in the first invention, a foundation structure casting process is provided before the temporary utility pole installation process, and the foundation structure casting process involves casting a foundation structure, to which the connectors used in the temporary utility pole installation process can be attached and detached, into the ground around the base of the existing utility pole. In the invention having such a configuration, the foundation structure casting step is carried out when the foundation structure has not been cast into the ground around the base of the existing utility pole. In addition, the foundation structure is intended to support the connector and the temporary utility pole by attaching and detaching the connector, as well as to support a newly installed utility pole. Furthermore, the foundation structure does not need to be removed from the ground after the temporary utility pole removal process is completed.

[0012] In the invention having the above configuration, in addition to the effects of the first invention, the foundation structure is not removed from the ground after the temporary utility pole removal process is completed, so the newly installed utility pole is supported for a long period of time. Furthermore, since the foundation structure supports the connector, the connector and the temporary utility pole are prevented from tilting or tipping over between the temporary utility pole installation step and the second relocation step.

[0013] The third invention is a connector used in the first or second invention, comprising a plurality of segments and a holding portion for holding the plurality of segments together as a unit, wherein two of the plurality of segments form an existing utility pole mounting portion that is attached below the exposed portion of the existing utility pole that is exposed above ground, and one of the plurality of segments that does not form an existing utility pole mounting portion or one of the segments that forms the existing utility pole mounting portion has a temporary utility pole support portion that supports the base of the temporary utility pole.

[0014] In the invention having such a configuration, the connector is formed of, for example, a rigid metal. The holding portion may be, for example, a member having a bolt hole protruding from the peripheral surface of each of the plurality of segments, and a bolt hole for inserting the bolt hole. Furthermore, the number of the plurality of segments is not particularly limited. When the connector is installed directly on the ground at its original position, the detachable part for attaching and detaching the connector to the foundation structure is not required, whereas when the connector is attached to the foundation structure, the detachable part is required.

[0015] Furthermore, since two of the multiple divisional bodies form the existing utility pole mounting portion, the existing utility pole mounting portion has a separable structure. Furthermore, since one of the divided bodies that does not form an existing utility pole mounting portion, or one of the divided bodies that forms an existing utility pole mounting portion, has a temporary utility pole support portion, the temporary utility pole support portion may or may not be separated. In addition, different divided bodies may each have an existing utility pole mounting section and a temporary utility pole support section, or one divided body may have both an existing utility pole mounting section and a temporary utility pole support section.

[0016] In the invention having the above configuration, when the connector is attached to the existing utility pole and when it is removed from the existing utility pole, the plurality of segments are separated. On the other hand, when maintaining the state in which the connector is attached to the existing utility pole, the holding portion holds the multiple segments together as a unit to prevent them from separating.

[0017] The fourth invention is characterized in that, in the third invention, the partition body having the temporary utility pole support portion has a cylindrical shape and has an extension portion formed on its outer surface that extends toward the existing utility pole mounting portion.

[0018] In the invention having such a configuration, the extension portion may be a cylindrical body. The extension portion may be located at any height between the existing utility pole mounting portion and the partition body having the temporary utility pole support portion. For example, when the extension portion is located at the middle of each height position, the connector is H-shaped. When the extension portion is located at an upper or lower position of each height position, the connector is box-shaped or U-shaped. That is, the connector has an open end surrounded by an existing utility pole mounting portion, a temporary utility pole support portion, and an extension portion.

[0019] In the invention having the above configuration, since an open end is formed on the connector, if there are obstacles of different heights around the original position, such as ditches, fences, or trees, the connector can be installed while avoiding these obstacles by aligning the position of the open end with the position of the obstacle.

[0020] The fifth invention is a foundation structure used in the second invention, characterized in that the cylindrical body is made up of a plurality of vertically split pieces divided circumferentially along the vertical direction, and each of the vertically split pieces has a foundation detachable portion at its upper end to which a connector can be attached and detached, and a pointed end at its lower end that forms a sharp point on the vertical cross section. In the invention having such a configuration, the foundation structure may be composed of, for example, concrete material and reinforcing bars embedded therein. The detachable portion may have, for example, a flange structure with bolt holes through which bolts are inserted. In this case, the connector must also have a similar flange structure at its bottom. Furthermore, the number of the plurality of vertical split pieces is not particularly limited.

[0021] In the invention having the above configuration, the foundation structure is made up of a plurality of vertical shards, which can be driven into the ground one by one around the base of the existing utility pole. Furthermore, the vertical shards have sharp points at their lower ends, which make it easy for them to penetrate into the ground. Furthermore, after the vertical sections are cast, the vertical sections are pressed against the bottom of the base of the existing utility pole due to the force exerted by the earth pressure in the direction of contact with each other, preventing the position of each vertical section on the ground from shifting. [Effects of the Invention]

[0022] According to the first invention, the only means required to erect a new utility pole in the original position of an existing utility pole is a connector, eliminating the need for the various components used in conventional technology. Therefore, according to the first invention, the effort required for each step is reduced, making it possible to complete the entire work in a short time. Furthermore, in the temporary utility pole installation process, the temporary utility pole is installed via a connector without being buried in the ground at the temporary location, so whether or not the first invention can be implemented is less likely to depend on the condition of the land surrounding the existing utility pole.

[0023] Furthermore, during the existing utility pole removal process, even when the existing utility pole is removed from its original position, the temporary utility pole remains supported by the connector, thereby improving the safety of the work carried out between the new utility pole permanent installation process and the second relocation process.

[0024] According to the second invention, in addition to the effects of the first invention, the foundation structure prevents the connectors and temporary utility poles from tilting between the temporary utility pole installation process and the second relocation process, thereby improving the safety of the work and avoiding the need to start over from the temporary utility pole installation process.

[0025] According to the third invention, the connector comprises a plurality of segments and a holding portion, and is made up of a small number of parts, so that the work carried out in the temporary utility pole installation process and the temporary utility pole removal process can be completed in a short time. Furthermore, whether the temporary utility pole support part is detachable or not, the divided parts are separated or held together as a single unit by the holding part, so the connector can be retrofitted to an existing utility pole. Furthermore, if the temporary utility pole support part has a structure that does not separate, it is possible to support the temporary utility pole on the temporary utility pole support part with fewer steps.

[0026] According to the fourth invention, in addition to the effects of the third invention, by forming an open end in the connector, the connector can be installed to avoid these obstacles, so that the feasibility of implementing the utility pole original position replacement method is less likely to be affected by the condition of the land surrounding the original position and the temporary position.

[0027] According to the fifth invention, the vertical split pieces can be cast one by one into the ground around the base of the existing utility pole, so that the foundation structure can be installed without moving the existing utility pole from its original position. Furthermore, after the multiple vertical segments have been cast, the position of each vertical segment on the ground is prevented from changing, so the base of the existing utility pole can be stably supported by the foundation structure. [Brief explanation of the drawings]

[0028] [Figure 1] FIG. 2 is a process diagram of the utility pole original position replacement method according to the first embodiment. [Figure 2] 1 is an external view for explaining the steps of a utility pole original position replacement method according to a first embodiment. FIG. [Figure 3] 1 is an external view for explaining the steps of a utility pole original position replacement method according to a first embodiment. FIG. [Figure 4] FIG. 10(a) is a perspective view of a substructure according to Example 2, (b) is a plan view of the substructure, and (c) is a longitudinal cross-sectional view of approximately one half of the substructure in the radial direction. [Figure 5] FIG. 10(a) is a plan view of a connector according to a third embodiment, and FIG. 10(b) is a view showing the connector in use. [Figure 6] 10(a) is an exploded view of a connector according to a third embodiment, and FIG. 10(b) is a plan view of a connector according to a first modified example of the third embodiment. [Figure 7] 10(a) is a plan view of a connector according to a second modified example of the third embodiment, and FIG. 10(b) is a view of the connector in use. [Figure 8] FIG. 10 is a diagram showing a state in which a connector according to a third modified example of the third embodiment is used. DETAILED DESCRIPTION OF THE INVENTION [Example]

[0029] A utility pole base position replacement method according to a first embodiment of the present invention will be described in detail with reference to Fig. 1 to Fig. 3. Fig. 1 is a process diagram of the utility pole base position replacement method according to the first embodiment. As shown in FIG. 1, the utility pole original position replacement method 1 according to the first embodiment is a utility pole original position replacement method for replacing an existing utility pole with a new utility pole at the original position of the existing utility pole, and includes a foundation structure installation process in step S1, a temporary utility pole installation process in step S2, a first relocation process in step S3, an existing utility pole removal process in step S4, a new utility pole permanent installation process in step S5, a second relocation process in step S6, and a temporary utility pole removal process in step S7.

[0030] Next, each step constituting the utility pole base position replacement method 1 will be described with reference to Fig. 2 and Fig. 3. Fig. 2 and Fig. 3 are both external views for explaining the steps of the utility pole base position replacement method according to Example 1. Note that the components shown in Fig. 1 are given the same reference numerals in Fig. 2 and Fig. 3, and their description will be omitted. As shown in Fig. 2(a), the foundation structure casting step of step S1 is a step of casting the foundation structure 10, which will be used in the temporary utility pole installation step of step S2, into the ground G around the base 80a of the existing utility pole 80. Specifically, this casting is performed using a pile driver or a compressed air hammer. As explained in Figure 4, the foundation structure 10 is made up of a cylindrical body divided into three vertical pieces 11 along the vertical direction and circumferentially, and these vertical pieces 11 are cast one by one into the ground G around the original position 90. As a result, as shown in FIG. 2(b), the foundation structure 10 is buried in the ground G with the plurality of vertical split pieces 11 each surrounding the base portion 80a.

[0031] Next, as shown in Figure 2(c), the temporary utility pole installation process of step S2 is a process of installing a temporary utility pole 81 at a temporary position 91 adjacent to the original position 90 where the existing utility pole 80 is installed. This process uses a connector 20 to connect the existing utility pole 80 and the base 81a of the temporary utility pole 81 and support this temporary utility pole 81. Here, the temporary position 91 is a position that is set on the connector 20 when the connector 20 is used. The connector 20 is attached to the foundation structure 10 and is supported by the foundation structure 10, and is also attached to the existing utility pole 80 and is supported by the existing utility pole 80 in an auxiliary manner. As a specific procedure, the temporary utility pole 81 may be supported by the connector 20 after the connector 20 has been attached to the foundation structure 10, or the connector 20 that already supports the temporary utility pole 81 may be attached to the foundation structure 10.

[0032] Next, as shown in Figure 2(c), a first relocation step of step S3 is carried out. This first relocation step of step S3 is a step of relocating and holding the overhead wires 80c to 80e held by the cross arm 80b etc. of the existing utility pole 80 to the cross arm 81b etc. of the temporary utility pole 81. The overhead wire 80c held by the cross arm 80b is a high-voltage line. The overhead wire 80d is a low-voltage line, and the overhead wire 80e is a communication line.

[0033] 3(a), the existing utility pole removal step of step S4 is a step of lifting up the existing utility pole 80 and removing it from its original position 90. As a result, a cavity S is formed inside the foundation 10.

[0034] Next, as shown in FIG. 3(b), the new utility pole permanent installation process of step S5 is a process of permanently installing the new utility pole 82 at the original position 90 from which the existing utility pole 80 was removed. Specifically, this process is a process of suspending the new utility pole 82 and inserting its base portion 82a into the cavity S of the foundation structure 10. Thereafter, a second relocation step of step S6 is carried out. This second relocation step of step S6 is a step of relocating and holding the overhead wires 80c to 80e held by the cross arm 81b etc. of the temporary utility pole 81 to the cross arm 82b etc. of the new utility pole 82.

[0035] 3(c), the temporary utility pole removal step of step S7 is a step of removing the temporary utility pole 81 and the connector 20. By removing the connector 20, the temporary position 91 disappears. Upon completion of the temporary utility pole removal process in step S7, the existing utility pole 80 is replaced with a new utility pole 82 at its original position 90.

[0036] As explained above, according to utility pole original position replacement method 1, the only means required to erect a new utility pole 82 at the original position 90 of an existing utility pole 80 are the foundation 10 and the connector 20. Furthermore, the only processes for attaching and detaching the connector 20 to the foundation 10 are the temporary utility pole installation process in step S2 and the temporary utility pole removal process in step S7. Therefore, according to utility pole base position replacement method 1, it is possible to reduce the effort required to perform each step, and therefore the entire work of utility pole base position replacement method 1 can be completed in a short time.

[0037] Furthermore, by burying the foundation 10 in the foundation casting step of step S1, the connector 20 is reliably supported from the temporary utility pole installation step of step S2 to the second relocation step of step S6. This prevents the connector 20 and the temporary utility pole 81 from tilting, improving the safety of the work and making it possible to avoid having to start over from the temporary utility pole installation step of step S2. Furthermore, since the foundation structure 10 supports the newly constructed utility pole 82 for a long period of time, it is expected that the stability of the newly constructed utility pole 82 against strong winds during a typhoon, for example, will be improved. In addition, since the foundation structure 10 is not removed from the ground G after the temporary utility pole removal process in step S7 is completed, the foundation structure 10 can be used for the next implementation of utility pole original position replacement method 1.

[0038] Furthermore, in the temporary utility pole installation process of step S2, the temporary utility pole 81 is installed on the connector 20. That is, the temporary utility pole 81 is installed in the temporary position 91 without being buried in the ground G, so whether or not the utility pole original position replacement method 1 can be implemented is less likely to be affected by the state of the land around the original position 90 and the temporary position 91. In addition, since the temporary utility pole 81 is not buried in the ground G at the temporary position 91, there is no need to excavate the temporary position 91. Therefore, the workload can be reduced compared to the conventional case.

[0039] Furthermore, in the existing utility pole removal process of step S4, even when the existing utility pole 80 is removed from its original position 90, the temporary utility pole 81 remains supported by the connector 20, thereby improving the safety of the work carried out in the new utility pole permanent installation process of step S5 and the second relocation process of step S6. Furthermore, in the temporary utility pole installation process of step S2, excavation work at temporary position 91 is not required, and in the temporary utility pole removal process of step S7, the temporary utility pole 81 and the connector 20 can be easily removed, so that the new utility pole 82 can be erected in the original position 90 of the existing utility pole 80 in a short amount of time. [Example]

[0040] Next, a substructure according to a second embodiment of the present invention will be described in detail with reference to Fig. 4. Fig. 4(a) is a perspective view of the substructure according to Example 2, Fig. 4(b) is a plan view of the same substructure, and Fig. 4(c) is a longitudinal cross-sectional view of approximately one half of the substructure in the radial direction. As shown in FIGS. 4(a) to 4(c), the foundation structure 10 according to the second embodiment is an apparatus used in the utility pole original position replacement method 1 according to the first embodiment. The foundation structure 10 is made up of three vertically split pieces 11 obtained by dividing a cylindrical body into three equal parts along the vertical direction H and in the circumferential direction α. Therefore, as shown in FIG. 4(b), each vertical split piece 11 has a sector shape with a central angle θ of 120 degrees in plan view.

[0041] Each vertical split piece 11 has a base detachable portion 12 at its upper end to which the detachable portions 27, 28 (see FIG. 5) of the connector 20 are attached. The base detachable portion 12 has a flange structure that protrudes outward from the outer peripheral surface 11a of the vertical split piece 11, and is fitted with a bolt B for fixing the detachable portions 27, 28 of the connector 20. 27 A plurality of insertion holes 12a for inserting the screws (see FIG. 5(b)) are arranged along the circumferential direction α.

[0042] Furthermore, as shown in Fig. 4(c), the vertical split piece 11 has a pointed end 13 at its lower end, which is pointed in the vertical cross section. The vertical split piece 11 is composed of concrete material C and reinforcing bars R embedded therein.

[0043] Therefore, when multiple vertical split pieces 11 are driven one by one into the ground G around the base 80a of the existing utility pole 80, as shown in Figure 4(b), the curved inner surface 11b of the vertical split piece 11 fits onto the surface of the base 80a, with the soil S1 remaining between the vertical split piece 11 and the base 80a interposed therebetween. As a result, as shown in FIGS. 4(a) and 4(b), for example, a strong wind blows the center A of the foundation structure 10 from the outside. 10 When a force F1 acts toward the center A, the vertical split piece 11 moves toward the center A due to the pressure resistance load of the base 80a. 10 Furthermore, since the side surfaces 11c of the vertically split pieces 11 are in contact with each other, the vertically split pieces 11 are prevented from moving toward the center A.10 The movement of the particles to the target area is suppressed.

[0044] On the other hand, the center A of the foundation structure 10 10 Therefore, when a force F2 acts outward, this force F2 is canceled out by the earth pressure on the ground G around the original position 90, so that the vertical split pieces 11 are prevented from moving outward. Therefore, after the plurality of vertical slits 11 are cast, the position of each vertical slit 11 on the ground G is prevented from changing.

[0045] As described above, according to the foundation 10, the vertical cleavage pieces 11 can be driven one by one into the ground G around the base 80a of the original position 90, so that the foundation 10 can be installed without moving the existing utility pole 80 from the original position 90. In addition, the pointed end 13 makes it easier for the vertical cleavage pieces 11 to penetrate into the ground G, so that the workload in the foundation driving process of step S1 can be reduced. Furthermore, after the multiple vertical split pieces 11 are cast, the position of each vertical split piece 11 on the ground G is prevented from changing, so the foundation structure 10 can stably support the base 80a of the existing utility pole 80. [Example]

[0046] Furthermore, a connector according to a third embodiment of the present invention will be described in detail with reference to Fig. 5 and Fig. 6(a). Fig. 5(a) is a plan view of the connector according to Example 3, and Fig. 5(b) is a diagram showing the connector in use. Note that the components shown in Figs. 1 to 4 are given the same reference numerals in Fig. 5 and Fig. 6(a), and their description will be omitted. As shown in Figures 5(a) and 5(b), the connector 20 of Example 3 is a device used in the utility pole original position replacement method 1 of Example 1, and includes three segments 21 to 23 and a holding portion 24 for holding these segments 21 to 23 together as a single unit. The divided bodies 21 to 23 and the holding portion 24 are all made of a metal having rigidity.

[0047] Of the segments 21 to 23, segments 21 and 22 form existing utility pole mounting sections 25 and 26 that are attached below an exposed portion 80A that is exposed above ground of the existing utility pole 80. The lower ends of these existing utility pole mounting sections 25 and 26 are provided with detachable sections 27 and 28 that are attached to and detached from the foundation detachable section 12 of the foundation structure 10. Specifically, the existing utility pole mounting portions 25 and 26 are half-cylinder bodies. The detachable portions 27 and 28 each have a semicircular flange structure, and bolts B 27 A plurality of insertion holes 27a, 28a for inserting the components are provided along the circumferential direction of the detachable portions 27, 28. Furthermore, the division bodies 21 and 22 have intermediate portions 29 and 30 that are connected to the existing utility pole mounting portions 25 and 26. These intermediate portions 29 and 30 are connected to the division body 23.

[0048] Of the segments 21 to 23, the segment 23 that does not form the existing utility pole mounting portions 25, 26 has a triangular shape in side view, and has an upper end surface 23a and a temporary utility pole supporting portion 31. Specifically, the temporary utility pole support 31 is a plurality of holes 31a arranged in a circular ring shape and opening in the upper end surface 23a. The temporary utility pole 81 is placed on the upper end surface 23a in the area surrounded by the plurality of holes 31a.

[0049] Furthermore, the temporary utility pole support part 31 includes a cylindrical fixing part 32 that is fixed to the base part 81a of the temporary utility pole 81. This fixing part 32 has a plurality of insertion holes 32a that are arranged at positions corresponding to the hole parts 31a of the temporary utility pole support part 31. Therefore, the bolts B are inserted into the plurality of hole portions 31a and the plurality of insertion holes 32a. 32 By inserting and fixing each of the segments 23 one by one, the temporary utility pole 81 is supported by the segments 23.

[0050] Furthermore, the retaining portion 24 is provided so as to protrude from the boundary between the intermediate portion 29 and the divided body 23, and from the boundary between the intermediate portion 30 and the divided body 23, respectively, and has protruding members 24a and 24b each having a hole 24c stacked in the vertical direction H to form a columnar shape. Of these, the protruding member 24a is attached to the intermediate portions 29 and 30 and is separate from the divided body 23. Furthermore, the protruding member 24b is attached to the divided body 23 and is separate from the intermediate portions 29 and 30. Therefore, after the existing utility pole mounting portions 25 and 26 are arranged so as to sandwich the existing utility pole 80, the bolts B are inserted into all of the holes 24c of the protruding members 24a and 24b. 24 By inserting the connector 20 through the existing utility pole 80, the segments 21 to 23 become inseparable, and the connector 20 is attached to the existing utility pole 80.

[0051] On the other hand, when attaching the connector 20 to the existing utility pole 80 and when removing it from the existing utility pole 80, as shown in FIG. 6(a), the bolt B 24 The divided bodies 21 to 23 are separated by pulling the holder out of the hole 24c.

[0052] As described above, the connector 20 comprises the segments 21 to 23 and the holding portion 24, and is made up of a small number of parts, so that the work carried out in the temporary utility pole installation process in step S2 and the temporary utility pole removal process in step S7 can be completed in a short time. Furthermore, the temporary utility pole support portion 31 of the connector 20 allows the temporary utility pole 81 to be installed at the temporary position 91 without being buried in the ground G, eliminating the need for excavation work at the temporary position 91, and making it less likely that the feasibility of implementing the utility pole original position replacement method 1 will be affected by the condition of the land at the original position 90 and the temporary position 91.

[0053] Furthermore, by separating or overlapping the protruding members 24a, 24b of the holding portion 24, the divided bodies 21 to 23 can be separated or held together as a single unit, so that the connector can be attached to the existing utility pole 80 afterwards. In addition, by attaching the detachable portions 27, 28 of the segments 21, 22 to the detachable foundation portion 12 of the foundation 10, the connector 20 is supported by the foundation 10, which prevents the connector 20 from shifting position when the existing utility pole 80 is removed or the temporary utility pole 81 is inserted. This allows such work to be completed safely.

[0054] Next, couplers according to first to third modified examples of Example 3 will be described with reference to Fig. 6(b) to Fig. 8. Fig. 6(a) is an exploded view of the coupler according to Example 3, and Fig. 6(b) is a plan view of the coupler according to the first modified example of Example 3. Note that the components shown in Fig. 1 to Fig. 6(a) are given the same reference numerals in Fig. 6(b) and their description will be omitted. As shown in FIG. 6(b), a connector 20A according to a first modification of the third embodiment includes two divided bodies 33, 34 and holding portions 35, 36 for holding the divided bodies 33, 34 together as a unit.

[0055] Of these, divided body 33 has the same configuration as divided body 21 of connector 20. Divided body 34 has a configuration in which divided body 22 and divided body 23 of connector 20 are integrated together. Therefore, the divisional bodies 33, 34 are provided with existing utility pole mounting portions 37, 38 and detachable portions 39, 40 having the same configurations as the existing utility pole mounting portions 25, 26 and detachable portions 27, 28 of the connector 20, respectively.

[0056] Furthermore, one of the divisional bodies 33, 34 that form the existing utility pole mounting portions 37, 38, namely the divisional body 34, has a temporary utility pole supporting portion 41 that supports the base portion 81a of the temporary utility pole 81. This temporary utility pole support part 41 has a plurality of holes 41a for inserting bolts (not shown) therethrough, and a cylindrical fixing part (not shown) that is fixed to the base part 81a of the temporary utility pole 81. This fixing part has a configuration similar to that of the fixing part 32 shown in FIG. Furthermore, the divided body 34 is formed with an extension portion 42 that extends toward the existing utility pole mounting portions 37, 38. The diameter of the temporary utility pole supporting portion 41 is smaller than the diameter of the temporary utility pole supporting portion 31 of the connector 20, and the number of holes 41a is also smaller than the number of holes 31a of the connector 20. This is on the assumption that the diameter of the temporary utility pole 81 is not limited to one type.

[0057] Of the holding portions 35 and 36, the holding portion 35 has the same configuration as the holding portion 24 of the connector 20. On the other hand, the holding portion 36 is provided at the boundary between the existing utility pole mounting portion 37 and the existing utility pole mounting portion 38, and holds them together, either separately or integrally. Specifically, the holding portion 36 comprises a cylindrical body 36a attached to the existing utility pole mounting portion 37 and separated from the existing utility pole mounting portion 38, a cylindrical body 36a' attached to the existing utility pole mounting portion 38 and separated from the existing utility pole mounting portion 37, and a bolt B inserted into the cylindrical bodies 36a, 36a'. 36 is. Other than this, the configuration of connector 20A is the same as that of connector 20A.

[0058] In the connector 20A, the existing utility pole mounting portions 37 and 38 are arranged so as to sandwich the existing utility pole 80, and then the bolts B are fastened to the holding portions 35 and 36. 35 ,B 36 By inserting these parts through the existing utility pole 80, the segments 33 and 34 become inseparable, and the connector 20A is attached to the existing utility pole 80. On the other hand, when attaching the connector 20A to the existing utility pole 80 and when removing it from the existing utility pole 80, the bolt B 35 ,B 36 is pulled out to separate the divided bodies 33 and 34. Therefore, according to the connector 20A, since there are two divided bodies 33, 34, the temporary utility pole 81 can be supported in fewer steps than with the connector 20. Other than this, the functions and effects of connector 20A are the same as those of connector 20.

[0059] Next, a connector according to a second modified example of Example 3 will be described with reference to Fig. 7. Fig. 7(a) is a plan view of the connector according to the second modified example of Example 3, and Fig. 7(b) is a diagram showing the connector in use. Note that the components shown in Figs. 1 to 6(b) are given the same reference numerals in Fig. 7, and their description will be omitted. As shown in Figures 7(a) and 7(b), a connector 20B according to a second modified example of Example 3 includes three divided bodies 43 to 45 and holding portions 46 and 47 for holding these divided bodies 43 to 45 together as a single unit.

[0060] Of the segments 43 to 45, segments 43 and 44 form existing utility pole mounting portions 48 and 49. The lower ends of these existing utility pole mounting portions 48 and 49 are provided with detachable portions 50 and 51 that are attached to and detached from the foundation detachable portion 12 of the foundation 10. These detachable portions 50 and 51 each have a plurality of insertion holes 50a along their circumferential direction. The divided body 45 also has a temporary utility pole supporting portion 52. This temporary utility pole supporting portion 52 has the same structure as the fixing portion 32 that is fixed to the temporary utility pole 81. Furthermore, the divided body 45 has a cylindrical shape, and an extension portion 53 extending toward the existing utility pole mounting portions 48, 49 is formed on the outer circumferential surface 45a thereof. The length of the divided body 45 is about half the length of the divided bodies 43 and 44. The extension portion 53 is also cylindrical.

[0061] The tip 53a of the extension portion 53 is connected to the existing utility pole mounting portions 48, 49. Furthermore, the extension portion 53 is provided at a position approximately half the height of the segments 43, 44. Therefore, the connector 20B has a substantially H-shape in side view.

[0062] The base 81a of the temporary utility pole 81 inserted into the divided body 45 is supported by a base D and a hydraulic jack J. This is because the bolt B attached to the detachable foundation part 12 of the foundation structure 10 50 Here, the temporary position 91 is a position on the ground G where the divided body 45 and the temporary utility pole 81 are to be installed when the connector 20B is used.

[0063] The holding portion 46 includes protruding pieces 46a, 46a' protruding from the existing utility pole mounting portions 48, 49, respectively, and having holes (not shown). The protruding pieces 46a, 46a' are provided with bolts B inserted into the holes provided in the protruding pieces 46a, 46a'. 46 One holding portion 47 has the same configuration as holding portion 36 of connector 20A.

[0064] Connector 20B having the above configuration has upper open end 54 and lower open end 55 surrounded by segments 43, 44, segment 45, and extension 53. Therefore, connector 20B can be installed while avoiding obstacles such as fence B and hanging trees T. Therefore, whether or not the utility pole original position replacement method 1 can be implemented is less likely to be affected by the state of the land surrounding the original position 90 and the temporary position 91. This makes it possible to avoid the hassle of selecting a temporary position. Other than this, the functions and effects of connector 20B are the same as those of connector 20.

[0065] Furthermore, a connector according to a third modified example of Example 3 will be described with reference to Fig. 8. Fig. 8 is a diagram showing a state in which the connector according to the third modified example of Example 3 is used. Note that the components shown in Figs. 1 to 7 are given the same reference numerals in Fig. 8, and descriptions thereof will be omitted. 8, in connector 20C according to a third modification of Example 3, in connector 20B, the length of segment 45 is approximately equal to the lengths of segments 43 and 44. Therefore, extension portion 53 is provided at a height position approximately equal to the maximum height of segments 43 and 44. Furthermore, the number of holding portions 46 and 47 is increased compared to the case of the connector 20B, and the hydraulic jack J is omitted. Other than this, the configuration of connector 20C is the same as that of connector 20B.

[0066] Therefore, in connector 20C, lower open end 55 is wider in vertical direction H than in connector 20B. Therefore, connector 20C can be installed while avoiding obstacles such as a taller wall B'. Other than this, the functions and effects of connector 20C are the same as those of connector 20B.

[0067] The utility pole replacement method, connector, and foundation structure according to the present invention are not limited to those shown in the examples. For example, if the foundation structure 10 is already installed, the foundation structure casting step in step S1 may be omitted. Furthermore, the number of vertical cleavage pieces 11 in the foundation structure 10 may be other than three, such as two or four. The inner peripheral surface 11b of the vertical cleavage piece 11 does not necessarily have to be in close contact with the surface of the base 80a of the existing utility pole 80. This is because displacement of the foundation structure 10 can be prevented by burying soil between the inner peripheral surface 11b and the surface of the base 80a. Furthermore, the holding portion 24 of the connector 20 may have a hinge structure. Alternatively, the intermediate portions 29 and 30 may be omitted. [Industrial Applicability]

[0068] The present invention can be used as a utility pole original position replacement method for replacing an existing utility pole with a new utility pole at the original position of the existing utility pole, as well as a connector and foundation structure used in this method. [Explanation of symbols]

[0069] 1...Method for replacing utility pole at original position 10...Foundation structure 11...Vertical split piece 11a...Outer surface 11b...Inner surface 11c...Side surface 12...Foundation detachable portion 12a...Insertion hole 13...Tip portion 20, 20A to 20C...Connector 21 to 23...Divided body 23a...Upper end surface 24...Retaining portion 24a, 24b...Protruding member 24c...Hole portion 25, 26...Existing utility pole mounting portion 27, 28...Attachment / detachment portion 27a, 28a...Insertion hole 29, 30...Intermediate portion 31...Temporary utility pole support portion 31a...Hole portion 32...Fixing portion 32a...Insertion hole 33, 34...Divided body 35, 36...Retaining portion 36a, 36a'...Cylinder 37, 38...Existing utility pole mounting portion 39, 40...Detachable portion 41...Temporary utility pole support portion 41a...Hole portion 42...Extended portion 43-45...Divided body 45a...Outer surface 46, 47...Retaining portion 46a, 46a'...Protruding piece 48, 49...Attaching portion to existing utility pole 50, 51...Detachable portion 50a...Insertion hole 52...Temporary utility pole support portion 53...Extended portion 53a...Tip 54...Upper open end 55...Lower open end 80...Existing utility pole 80A...Exposed portion 80a...Base 80b...Cross arm 80c-80e...Overhead wire 81...Temporary utility pole 81a...Base 81b...Cross arm 82...New utility pole 82a...Base 90...Original position 91...Temporary position

Claims

1. A method for replacing an existing utility pole with a new utility pole at its original position, comprising: a temporary utility pole installation process for installing the temporary utility pole at a temporary position adjacent to the original position where the existing utility pole is installed, using a connector that connects the existing utility pole and the temporary utility pole and supports the temporary utility pole; a first relocation step of relocating and holding the overhead wires held on the existing utility poles to the temporary utility poles; an existing utility pole removal process of removing the existing utility pole from the original position; a new utility pole installation process of permanently installing the new utility pole at the original position from which the existing utility pole was removed; a second relocation step of relocating the overhead line held on the temporary utility pole to the new utility pole and holding the overhead line thereon; A method for replacing a utility pole at its original position, comprising: a temporary utility pole removal process for removing the temporary utility pole and the connector.

2. A foundation structure casting step is provided before the temporary utility pole installation step, 2. The utility pole original position replacement method according to claim 1, wherein the foundation structure casting process comprises casting a foundation structure to which the connectors used in the temporary utility pole installation process are attached and detached into the ground around the base of the existing utility pole.

3. A connector used in the utility pole base position replacement method according to claim 1 or 2, The device includes a plurality of divided bodies and a holding portion for holding the plurality of divided bodies together as a unit, Two of the plurality of division bodies form an existing utility pole mounting portion that is mounted below an exposed portion of the existing utility pole that is exposed above ground, A connector characterized in that, among the multiple divided bodies, one of the divided bodies that does not form the existing utility pole mounting portion or one of the divided bodies that forms the existing utility pole mounting portion has a temporary utility pole support portion that supports the base of the temporary utility pole.

4. The connector as described in claim 3, characterized in that the divided body having the temporary utility pole support portion is cylindrical in shape and has an extension portion formed on its outer surface that extends toward the existing utility pole mounting portion.

5. A foundation structure used in the utility pole original position replacement method according to claim 2, The cylindrical body is made up of a plurality of vertically split pieces that are split in the circumferential direction along the vertical direction, A foundation structure characterized in that each of the multiple vertical split pieces has a foundation attachment / detachment portion at its upper end to which the connecting device is attached and detached, and a pointed end portion at its lower end that forms a pointed tip on a vertical cross section.

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