JP2024057792A - Waterproof sheet for power transmission facility - Google Patents

Abstract

To provide a waterproof sheet for a power transmission facility that can reduce the number of waterproof sheets required to protect a desired region on a ground around a base of the power transmission facility.SOLUTION: A waterproof sheet 1 for a power transmission facility for covering a ground 33 around a base 31 of a power transmission facility 30 to protect it from rainwater, includes: a waterproof sheet 2; a hole 3 formed near the center of the sheet 2 for leading out the base 31 of the power transmission facility 30 onto the sheet 2; a cut 4 connecting an edge 3a of the hole 3 and an outer edge 2a of the sheet 2; and an opening/closing structure 5 for opening and closing the cut 4 as desired.SELECTED DRAWING: Figure 2

Description

The present invention relates to a waterproof sheet for power transmission equipment that covers the ground around the base of the equipment to protect it from rainwater.

First, the prior art will be described with reference to FIG.
FIG. 9 is a perspective view showing an example of a conventional waterproofing measure for the base of a power transmission facility.
Conventionally, earthquakes and heavy rains may cause cracks and landslides around the base (base) of a power transmission tower, which is a power transmission facility. In this case, emergency measures are taken to protect the ground 33 around the base (base) of the power transmission tower by covering it with a waterproof protective sheet 34, such as a blue tarp, in order to ensure the stability of the power transmission line foundation strength and prevent the cracks and landslides from expanding.
More specifically, for example, as shown in Figure 9, when protecting the ground 33 around a foundation 31 located at the lower end of a tower leg 30, which is the base of a transmission tower, a plurality of protective sheets 34, such as blue tarpaulins, are laid on the ground 33 around the foundation 31, and weights, such as sandbags 32, are placed on the edges 34a of the protective sheets 34 and on the overlapping parts to secure the protective sheets 34 in place.

For example, in the example shown in Figure 9, even if the area that needs to be protected by laying a minimum of protective sheets 34 to protect the ground 33 around the foundation 31 located at the very back of the page is, for example, inside the area indicated by the long dashed line R in the figure, in order to reliably protect this area with protective sheets 34, it was necessary to use a minimum of four protective sheets 34 and a large number of sandbags 32 to secure the edges 34a and the overlapping parts of these edges 34a.
In addition, when an earthquake or heavy rain occurs, there are many bases of power transmission facilities (tower legs 30 and foundations 31) that require emergency treatment as shown in FIG. 9 . Most of these locations are in the mountains and quick action is required, so this work places an extremely heavy physical burden on the workers.
For this reason, there was a need for a waterproof sheet that could efficiently cover and protect the ground 33 around the base of the power transmission facility.
As a prior application related to the present invention, for example, Patent Document 1 shown below is known.

Patent Document 1 discloses an invention entitled "Scour prevention sheet" that prevents scouring of the foundations of pillars erected on the bottom of the water in monopile-type offshore wind power generation facilities and the like.
The scouring prevention sheet, which is an invention disclosed in Patent Document 1, will be described using the same symbols as shown in Figure 1 in the document. It is a scouring prevention sheet that is laid on the bottom of the water and has a pile-like body (A2) penetrated from above to protect the foundation of the pile-like body (A2) from scouring, and is characterized in that it comprises a sheet body (10) and a weak part (20) provided at the penetration part of the pile-like body (A2) on the sheet body (10), and the weak part (20) has a structure that allows the pile-like body (A2) to penetrate more easily than the surrounding parts.
According to the invention disclosed in the above-mentioned Patent Document 1, by laying a scour prevention sheet on the bottom of the water before driving the support pillars, it is not necessary to carry out scouring prevention work immediately after erecting the support pillars. Therefore, it is not necessary to install the scouring prevention work and drive the support pillars one by one, and the laying of the scouring prevention sheet and the driving of the support pillars can be carried out consecutively. This has the effect of improving the overall construction efficiency.
Furthermore, according to the invention disclosed in Patent Document 1, the installation of the scour prevention works (laying of the scour prevention sheet) can be carried out first, and then the erection process and the installation process can be carried out successively using a dedicated ship. Therefore, the detention time of the dedicated ship is short, and the charter fee and ship rental fee are relatively cheap. In addition, since the detention time of the dedicated ship is short, it is possible to effectively use the dedicated ship by allocating it to other construction works.
In addition, according to the invention disclosed in Patent Document 1, each process can be carried out continuously for multiple units, which enables flexible construction, for example, by concentrating the completion of the covering process during periods when construction conditions such as weather and sea conditions are good, carrying out land-based work such as assembling the superstructure during seasons when construction conditions are poor, and then carrying out the erection process and installation process after recovery.
According to the invention disclosed in Patent Document 1, the scour prevention works can be installed simply by hanging the scour prevention sheet and laying it on the seabed, which makes the construction easy and highly efficient. In addition, since no rubble is used, there is no risk of damaging the supports.

Patent No. 7018159

In the case of the invention disclosed in the above-mentioned Patent Document 1, due to its structure, it is necessary to lay a scouring prevention sheet on the bottom of the water before driving the supports (corresponding to the base of the power transmission facility in this invention).
For this reason, when the invention technology disclosed in Patent Document 1 is repurposed, there is a problem in that it is not possible to adopt the method of using the pillar (corresponding to the base of the power transmission equipment in this invention) by laying a scouring prevention sheet as needed after the pillar is installed.

The present invention was made to address such conventional problems, and its purpose is to provide a waterproofing sheet for power transmission equipment that minimizes the number of waterproof sheets required to protect the desired area of the ground around the base of the power transmission equipment, and also makes it easier to install them.

The first invention for solving the above-mentioned problems is a waterproof sheet for power transmission equipment, which is a waterproof sheet for covering the ground around the base of the power transmission equipment to protect it from rainwater, and is characterized by comprising a waterproof sheet, a hole formed toward the center of the sheet for leading the base of the power transmission equipment onto the sheet, a slit connecting the edge of the hole and the outer edge of the sheet, and an opening and closing structure for opening and closing the slit as desired.
In the first invention having the above-mentioned configuration, the sheet covers the ground around the base of the power transmission facility and has the effect of preventing rainwater from penetrating into the ground in the portion covered by the sheet, thereby preventing the ground from becoming easily damaged.
In addition, the hole formed near the center of the sheet has the effect of allowing the base of the power transmission equipment to be led out onto the sheet.
Furthermore, the slit connecting the edge of the hole and the outer edge of the sheet has the effect of making it possible to lay a single sheet on the ground surrounding the base of an existing (already erected) power transmission facility.
In addition, the opening and closing structure provided at the slit has the effect of making it possible to switch the slit between open and closed states as necessary. That is, in the first invention, an open slit means that the hole in the sheet and the outer edge are connected via the slit. Also, a closed slit means that the hole in the sheet and the outer edge are not connected.

A second invention is the above-mentioned first invention, characterized in that the hole is provided near the edge and is provided with a perimeter changing structure for changing the perimeter of the hole.
The second invention having the above configuration has the same effect as the first invention described above. Furthermore, in the second invention, the perimeter changeable structure has the effect of making it possible to change the perimeter of the hole formed near the center of the sheet as necessary.
In this case, after placing the base of the power transmission equipment inside the hole of the second invention and laying a sheet around it, it is possible to shorten the circumference of the hole, if necessary, by using a circumference changing structure provided near the edge of the hole.
In this case, it is possible to minimize the gap formed between the base of the power transmission equipment and the edge of the hole formed in the sheet.
As a result, the second invention has the effect of preventing rainwater from entering through the gap formed between the base of the power transmission equipment and the edge of the hole formed in the sheet.

A third invention is the above-mentioned first or second invention, characterized in that the opening and closing structure is a zipper.
The third invention having the above configuration has the same effect as the first or second invention. In addition, in the third invention, the opening and closing structure for switching the open and closed state of the slit is particularly a fastener, so that the opening and closing operation of the slit can be performed easily and smoothly.

The fourth invention is the first or second invention described above, characterized in that the surface of the sheet displays a circle centered on the center of the hole and having an arbitrary laying radius.
The fourth invention having the above configuration has the same effect as the first or second invention. In the fourth invention, the circle displayed on the surface of the sheet, centered on the center of the hole and having an arbitrary installation radius, clearly indicates the area to be protected by the sheet at the base of any power transmission facility.
Therefore, according to the fourth invention, when the fourth invention is laid around the base of any power transmission equipment, it becomes easy to visually confirm whether the sheet has been laid sufficiently in the area to be protected and whether the ground is protected.

The fifth invention is the first or second invention described above, characterized in that the sheet has a connecting structure in at least a portion near its outer edge for connecting another waterproof sheet.
The fifth invention having the above configuration has the same effect as the first or second invention. In addition, the connecting structure in the fifth invention has the effect of making it possible to detachably connect another waterproof sheet to the outer edge of the sheet of the fifth invention.
In this case, it becomes possible to cover and protect the area adjacent to the sheet of the fifth invention with another waterproof sheet.

The sixth invention is the fifth invention described above, characterized in that the sheet in the fifth invention or a waterproof sheet separate from this sheet has an eave portion that covers the connecting structure.
The sixth invention having the above configuration has the same effect as the fifth invention. In addition, the eaves in the sixth invention described above have the effect of covering the connecting structure, which is the connecting portion, when another waterproof sheet is connected to the outer edge of the sheet in the fifth invention, thereby preventing rainwater from penetrating through this connecting structure to the underside of the sheet in the fifth invention or the other waterproof sheet.

According to the first invention as described above, the sheet has a hole formed near the center, a slit connecting the edge of the hole to the outer edge of the sheet, and an opening/closing structure that allows the slit to be opened and closed, so that the ground around the base of the power transmission equipment can be covered and protected with a single sheet.
Therefore, according to the first invention, there is no need to use multiple sheets to cover and protect the ground around the base of the power transmission equipment, as in the case shown in Figure 9 above, so the work of protecting the area around the base of the power transmission equipment can be carried out quickly and efficiently.
In addition, according to the first invention, unlike the invention disclosed in the above-mentioned Patent Document 1, it is possible to protect the ground around the base of existing power transmission equipment by laying a sheet when necessary.

The second invention has the same effect as the first invention described above. Furthermore, according to the second invention, by providing a perimeter adjustment structure near the edge of the hole formed in the sheet, the perimeter of the hole can be adjusted as desired.
Therefore, according to the second invention, when a sheet is laid on the ground around the base of the power transmission equipment and a gap occurs between a hole in the sheet and the base of the power transmission equipment, the circumference adjustment structure can be operated to narrow the gap between the base of the power transmission equipment and the hole.
As a result, when the second invention is laid on the ground around the base of the power transmission equipment, it is possible to effectively prevent water from seeping into the ground through the gaps between the base of the power transmission equipment and the holes in the sheet.
Therefore, according to the second invention, a waterproof sheet for power transmission equipment can be provided that provides better protection for the ground around the base of the power transmission equipment than a sheet that does not have a perimeter adjustment structure.

The third invention has the same effect as the first or second invention described above. Furthermore, according to the third invention, by using a fastener as the opening and closing structure for the slit formed in the sheet, the opening and closing work for the slit can be performed quickly and smoothly.
Therefore, according to the third aspect of the present invention, the work efficiency of laying and removing the sheet on the ground around the base of the power transmission equipment can be improved.

The fourth invention has the same effect as the first or second invention. Furthermore, according to the fourth invention, the circle displayed on the surface of the sheet is predetermined according to the standard of the power transmission facility and indicates the installation area of the sheet required to ensure stability around the base of the power transmission facility.
Therefore, according to the fourth invention, it becomes possible to easily visually confirm how far the sheet should be laid around the base of the power transmission equipment to which the sheet is to be laid, and whether the sheet has been laid in the required area without any shortage.
Therefore, according to the fourth aspect of the present invention, it is possible to improve the work efficiency and accuracy when laying a sheet on the ground around the base of power transmission equipment for protection.

The fifth invention has the same effect as the first or second invention described above. Furthermore, according to the fifth invention, since the sheet has a connecting structure near its outer edge, another waterproof sheet can be extended to the outer edge of the sheet laid on the ground around the base of the power transmission facility.
Therefore, according to the fifth invention, a wider area around the base of the power transmission equipment can be covered and protected with the sheet and other waterproof sheets.
As a result, according to the fifth aspect of the present invention, the periphery of the base of the power transmission equipment can be protected more reliably.

The sixth invention has the same effect as the fifth invention. Furthermore, according to the sixth invention, by providing a eaves portion on the connecting structure that connects the sheet and the waterproof sheet, the eaves portion can block rainwater and effectively prevent the rainwater from penetrating into the soil through the connecting portion between the sheet and the waterproof sheet.
Therefore, according to the sixth invention, a covering structure with superior protective effect can be provided when protecting the ground around the base of a power transmission facility by combining the sheet with other waterproof sheets.

FIG. 2 is a plan view of the waterproof sheet for power transmission equipment according to the embodiment. 1 is an oblique view showing a state in which a waterproofing sheet for power transmission equipment according to this embodiment is laid around the foundation of a steel tower leg. FIG. 3 is an enlarged plan view showing the periphery of a hole in the waterproof sheet for power transmission equipment according to the embodiment. FIG. 3 is an enlarged perspective view showing the periphery of a hole in the waterproof sheet for power transmission equipment according to the embodiment when in use. FIG. 1 is a plan view showing a state in which another waterproof sheet is connected to the outer edge of the waterproof sheet for power transmission equipment according to this embodiment. FIG. 1A is a partial plan view showing an example of a connecting structure provided on the outer edge of a waterproof sheet for power transmission equipment according to this embodiment, and FIG. 1B is a partial plan view showing another example of the same connecting structure. FIG. 1A is a partial oblique view of an example of a connecting structure of a waterproof sheet for power transmission equipment according to this embodiment, in which a canopy portion is provided, and FIG. 1B is a partial oblique view of another example of the same connecting structure, in which a canopy portion is provided. 1 is an image diagram of a case in which grommets for hanging sandbags are provided on the eave portion attached to the waterproofing sheet for power transmission equipment in this embodiment. FIG. FIG. 1 is a perspective view showing an example of a conventional waterproofing measure for a base portion of power transmission equipment.

The waterproof sheet for power transmission equipment according to an embodiment of the present invention will be described in detail with reference to Figures 1 to 8.

[1: Basic configuration of the present invention]
First, a basic configuration of a waterproof sheet for power transmission equipment according to an embodiment of the present invention (hereinafter simply referred to as "the present embodiment") will be described with reference to FIG.
FIG. 1 is a plan view of a waterproof sheet for power transmission equipment according to this embodiment.
The waterproof sheet 1 for power transmission equipment according to this embodiment is a waterproof sheet for covering the ground around the base of power transmission equipment to protect it from rainwater.
More specifically, the waterproof sheet 1 for power transmission equipment in this embodiment comprises a sheet 2 having any shape, for example a rectangular shape, and having waterproof properties, a hole 3 formed toward the center of the sheet 2 for leading out, for example, a foundation 31, which is the base of the power transmission equipment (for example, a steel tower leg 30, etc.) as shown in Figure 9 above, onto the sheet 2, a slit 4 connecting the edge 3a of the hole 3 and the outer edge 2a of the sheet 2, and an opening/closing structure 5 for opening and closing the slit 4 as desired.
In addition, in FIG. 1, a fastener 6 having an element 6 a, a slider 6 b, and a hook 6 c is used as the opening/closing structure 5 of the slit 4, for example. However, this opening/closing structure 5 is not necessarily limited to the fastener 6.

[2. Method of use of the present invention]
Next, a method of using the waterproof sheet 1 for power transmission equipment according to this embodiment will be described with reference to Figs.
Fig. 2 is a perspective view showing the state in which the waterproofing sheet for power transmission equipment according to this embodiment is laid around the base of the steel tower leg. Note that the same parts as those shown in Figs. 1 and 9 are given the same reference numerals, and the description of their configurations will be omitted.
To protect the ground 33 around the base of the power transmission equipment using the waterproof sheet 1 for power transmission equipment in this embodiment, first, the fastener 6, which is the opening and closing structure 5 provided in the slit 4 of the waterproof sheet 1 for power transmission equipment shown in Figure 1 above, is opened to open the slit 4.
After this, the foundation 31 (base) of the tower leg 30 (power transmission equipment) shown in Figure 2 is positioned within the hole 3 of the waterproof sheet for power transmission equipment 1 of this embodiment with the slit 4 open, and then the sheet 2 is laid on the ground 33 to surround this foundation 31.
Thereafter, by closing the fastener 6, which is an opening/closing structure 5 provided at the slit 4 of the waterproof sheet 1 for power transmission equipment in this embodiment, the installation of the waterproof sheet 1 for power transmission equipment on the ground 33 around the foundation 31 (base) of the tower leg 30 (power transmission equipment) is completed, as shown in Figure 2.
Furthermore, as shown in Figure 2, by placing a weight, for example a sandbag 32, at a desired location near the outer edge 2a of the waterproofing sheet for power transmission equipment 1 of this embodiment, which is laid around the foundation 31 (base) of the tower leg 30 (power transmission equipment), it is possible to preferably prevent the sheet 2 from being rolled up and peeled off from the ground 33 due to strong winds, etc.

[3: Actions and Effects of the Present Invention]
According to the waterproof sheet 1 for power transmission equipment of this embodiment as described above, the sheet 2 is provided with a hole 3 formed near the center thereof, a slit 4 connecting the edge 3a of the hole 3 and the outer edge 2a of the sheet 2, and an opening/closing structure 5 (e.g., fastener 6) for opening and closing the slit 4 as desired, so that the ground 33 around the base (e.g., foundation 31) of the power transmission equipment (e.g., tower leg 30) can be covered and protected with a single sheet.
Therefore, according to the waterproof sheet 1 for power transmission equipment of this embodiment, there is no need to use multiple sheets (e.g., four sheets) to cover and protect the ground 33 around the base (e.g., foundation 31) of the power transmission equipment (e.g., tower leg 30) with sheets, as in the case shown in Figure 9 above.
Therefore, according to the waterproof sheet 1 for power transmission equipment of this embodiment, work to protect the area around the base (e.g., foundation 31) of the power transmission equipment (e.g., tower leg 30) can be carried out quickly and efficiently.
In addition, according to the waterproof sheet 1 for power transmission equipment of the embodiment, unlike the invention disclosed in the above-mentioned Patent Document 1, it is possible to provide the effect of being able to cover and protect the ground 33 around the base (e.g., foundation 31) of existing power transmission equipment (e.g., tower leg 30) with the sheet when necessary.
In other words, the waterproof sheet 1 for power transmission equipment according to the embodiment has the advantage of allowing the user to freely choose whether or not to protect the area around the base (e.g., foundation 31) of the power transmission equipment (e.g., tower leg 30).

Furthermore, according to the waterproofing sheet 1 for power transmission equipment in this embodiment, the ground 33 around the base (foundation 31, etc.) of the power transmission equipment (e.g., tower leg 30, etc.) is protected by the sheet 2, thereby effectively preventing rainwater from penetrating into the ground 33 in this area.
As a result, it is possible to effectively prevent the ground around the base (foundation 31, etc.) of the power transmission equipment (e.g., tower leg 30, etc.) from collapsing due to the effects of, for example, an earthquake or heavy rain.
This will make it possible to prevent worst-case scenarios such as the collapse of power transmission facilities due to earthquakes or heavy rain.

[4. Optional additions to the basic configuration of the present invention]
<4-1; About the opening and closing direction of the fastener>
When a fastener 6 is used as the opening/closing structure 5 provided at the slit 4 of the waterproof sheet 1 for power transmission equipment in this embodiment, the slit 4 may be configured to be closed when the slider 6b of the fastener 6 is moved from the outer edge 2a of the sheet 2 toward the edge 3a of the hole 3.
In other words, the end position of the slider 6 b when the fastener 6 is operated to close the slit 4 may be set on the edge 3 a side of the hole 3 .
In this case, if the maximum diameter of the foundation 31 (base of the power transmission equipment) to be placed in the hole 3 is larger than the diameter of the hole 3 formed in the sheet 2, the termination side (the edge 3a side of the hole 3) of the fastener 6 closing the slit 4 can be left slightly open, so that a foundation 31 (base of the power transmission equipment) larger than the diameter of the hole 3 can be placed in the hole 3.
In this case, the versatility of the waterproof sheet 1 for power transmission equipment according to this embodiment relative to the size of the foundation 31 (the base of the power transmission equipment) can be improved.

<4-2: Circumference adjustment structure provided in hole>
Fig. 3 is a plan view showing an enlarged view of the periphery of the hole of the waterproof sheet for power transmission equipment according to this embodiment, and Fig. 4 is a perspective view showing an enlarged view of the periphery of the hole of the waterproof sheet for power transmission equipment when it is in use. Note that the same parts as those shown in Figs. 1, 2 and 9 are given the same reference numerals, and the description of their configurations will be omitted.
The waterproof sheet 1 for power transmission equipment in this embodiment may be provided with a circumference adjustment structure 7, for example as shown in Figures 1 and 3, near the edge 3a of the hole 3 for adjusting the circumference of the hole 3 as desired.
In addition, the circumference adjustment structure 7 may be composed of a plurality of grommets 8 (through holes) provided at desired intervals, for example, near the edge 3a of the hole 3, and a string 9 inserted into these grommets 8, as shown in Figures 1 and 3.

As shown in Figure 4, for example, the circumference adjustment structure 7 as described above can be used by laying the waterproofing sheet 1 for power transmission equipment of this embodiment on the ground 33 around the foundation 31 (base) of the tower leg 30 (power transmission equipment) on the ground 33, pulling the string 9 inserted into the eyelet 8 provided near the edge 3a of the hole 3 to narrow the hole 3, and then simply tying or fixing the end of the string 9, thereby adjusting the circumference of the hole 3 as desired.
In this case, the gap that occurs between the edge 3a of the hole 3 in the waterproof sheet 1 for power transmission equipment in this embodiment and the foundation 31 (base) of the tower leg 30 (power transmission equipment) can be narrowed as desired.
This makes it possible to effectively prevent rainwater from seeping in through the gap between the hole 3 and the foundation 31 (base) of the tower leg 30 (power transmission equipment), thereby weakening the ground 33 around the foundation 31.
Therefore, when the waterproof sheet 1 for power transmission equipment in this embodiment is provided with a circumference adjustment structure 7 near the edge 3a of the hole 3, a waterproof sheet can be provided that has a better protective effect around the foundation 31 (base) of the tower leg 30 (power transmission equipment) than when this circumference adjustment structure 7 is not provided.

In addition, although Figures 1 to 4 illustrate an example in which the circumference adjustment structure 7 is configured with eyelets 8 and string 9 provided near the edge 3a of the hole 3, the circumference adjustment structure 7 may have a structure other than the above.
More specifically, such a structure may be provided by folding the sheet 2 along the edge 3a of the hole 3 and sewing the edge 3a to provide a folded portion for inserting the string 9 therethrough, or by providing belt loops at multiple locations on the edge 3a of the hole 3 to provide a structure through which the string 9 can be inserted, and by inserting the string 9 through these string-passing structures, the circumference of the hole 3 can be adjusted as if closing the mouth of a drawstring bag.
In either case, the same effects as those obtained when the circumferential length adjustment structure 7 as shown in FIG. 4 is provided are obtained.

<4-3; About the circle displayed on the surface of the sheet>
As shown in Figure 1 above, a confirmation circle 10 centered on the center of the hole 3 and having an arbitrary installation radius may be displayed on the surface of the sheet 2 of the waterproof sheet for power transmission equipment 1 of this embodiment.
Generally, when a waterproof sheet is laid on the ground 33 around the base of a power transmission facility to protect it, the radius of the waterproof sheet that should be protected is determined by the standards for the power transmission facility.
Therefore, for example, if an earthquake or heavy rain causes a crack or landslide in the ground 33 around the base (foundation 31, etc.) of a power transmission equipment (e.g., a steel tower leg 30, etc.), workers will need to protect the equipment by laying waterproof sheets in appropriate areas according to the specifications of the power transmission equipment to be protected.
The confirmation circle 10 displayed on the surface of sheet 2 of the waterproof sheet 1 for power transmission equipment in this embodiment in Figure 1 is a circle having a radius for laying the waterproof sheet corresponding to any standard of power transmission equipment.

Therefore, by using the waterproofing sheet 1 for power transmission equipment of this embodiment in which the confirmation circle 10 as described above is displayed on the surface of the sheet 2, workers can easily visually confirm how far the sheet 2 should be laid around the base (e.g., foundation 31, etc.) of the power transmission equipment (e.g., tower leg 30, etc.) on which the sheet 2 is to be installed, and whether the sheet 2 has been laid without any shortage in the required area.
Therefore, by using the waterproofing sheet 1 for power transmission equipment of this embodiment, in which a confirmation circle 10 is displayed on the surface of the sheet 2, the work of laying the sheet 2 on the ground 33 around the base (e.g., foundation 31, etc.) of the power transmission equipment (e.g., tower leg 30, etc.) to provide protection can be performed efficiently and accurately.

<4-4: Regarding the connecting structure provided near the outer edge of the sheet>
Fig. 5 is a plan view showing a state where another waterproof sheet is connected to the outer edge of the waterproof sheet for power transmission equipment according to this embodiment. Fig. 6(a) is a partial plan view showing an example of a connection structure provided on the outer edge of the waterproof sheet for power transmission equipment according to this embodiment, and Fig. 6(b) is a partial plan view showing another example of the same connection structure. Note that the same parts as those shown in Figs. 1 to 4 and 9 are given the same reference numerals, and the description of their configurations is omitted.
As shown in Figures 1 and 5 above, the sheet 2 of the waterproof sheet 1 for power transmission equipment in this embodiment may be provided with a connecting structure 11 for connecting to another waterproof sheet 13 (see Figure 5) in at least a portion near its outer edge 2a.
Specific examples of the connecting structure 11 include a connecting structure 11a (fastener 6) as shown in Figure 6(a), a connecting structure 11b consisting of grommets 8 (through holes) provided at desired intervals near the outer edge 2a of the sheet 2 and near the outer edge 13a of the waterproof sheet 13 as shown in Figure 6(b) and a connecting string 14 inserted into the connecting portion between the grommets 8 of the sheet 2 and the grommets 8 of the waterproof sheet 13, or a snap button or hook-and-loop fastener (not shown) may be used as the connecting structure 11.
In either case, a waterproof sheet 13 can be connected to a desired portion of the outer edge 2a of the sheet 2 as required.
In addition, in the previous Figure 5, an example is described in which the connecting structure 11 is provided on the entire outer edge 2a of the sheet 2, but the connecting structure 11 may be provided only on a desired portion (a part) of the outer edge 2a of the sheet 2.

Furthermore, in the waterproofing sheet 1 for power transmission equipment in this embodiment, the sheet 2 is provided with the above-mentioned connecting structure 11 (e.g., connecting structure 11a, connecting structure 11b, etc.) near its outer edge 2a, so that the outside of the sheet 2 laid on the ground 33 around the base (e.g., foundation 31) of the power transmission equipment (e.g., tower leg 30, etc.) can also be covered and protected with the waterproof sheet 13.
Therefore, according to the waterproof sheet 1 for power transmission equipment of this embodiment having the connecting structure 11 as described above, a wider area around the base of the power transmission equipment can be covered and protected by the sheet 2 and another waterproof sheet 13.
As a result, by using the waterproof sheet for power transmission equipment 1 of this embodiment, which has a connecting structure 11, the connection between the waterproof sheet for power transmission equipment 1 and the waterproof sheet 13 can more reliably reduce the risk of secondary damage, such as the collapse of the power transmission equipment due to weakened ground collapsing due to rainwater in the event of an earthquake or heavy rain.
Although not specifically shown, by placing weights such as sandbags 32 at the connection portions between the sheet 2 and other waterproof sheets 13 in the waterproof sheet 1 for power transmission equipment in this embodiment and at desired locations near the outer edge 13a of the waterproof sheet 13, it is possible to effectively prevent the sheet 2 and the waterproof sheet 13 from being rolled up by wind, etc.

<4-5: Regarding the eaves installed at the connection between the sheet and the waterproof sheet>
7(a) is a partial perspective view of an example of a connection structure of a waterproof sheet for power transmission equipment according to this embodiment, in which a eaves portion is provided, and (b) is a partial perspective view of another example of the same connection structure, in which a eaves portion is provided. Note that the same reference numerals are used to designate the same parts as those shown in Figs. 1 to 6 and 9, and the description of their configurations will be omitted.
When the waterproof sheet 1 for power transmission equipment in this embodiment has a connecting structure 11 (e.g., connecting structure 11a, connecting structure 11b, etc.) particularly on the outer edge 2a of the sheet 2, the sheet 2 of the waterproof sheet 1 for power transmission equipment may have a tongue-shaped eave portion 12 arranged to cover this connecting structure 11, as shown in Figures 7 (a) and (b).
In this case, rainwater can be effectively prevented from penetrating into the ground 33 through the connecting structure 11 that connects the sheet 2 in the waterproof sheet 1 for power transmission equipment according to this embodiment to the other waterproof sheet 13 .
In this case, the protective effect of the power transmission equipment waterproofing sheet 1 of this embodiment and other waterproof sheets 13 on the ground 33 around the base (e.g., foundation 31) of the power transmission equipment (e.g., tower leg 30, etc.) can be further improved.

In addition, Figures 7 (a) and (b) explain the example of a case where a eave portion 12 is attached to the sheet 2 of the waterproof sheet 1 for power transmission equipment in this embodiment, but the eave portion 12 may also be provided on another waterproof sheet 13.
In this case as well, the same functions and effects are achieved as when the eave portion 12 is provided on the sheet 2 of the waterproof sheet 1 for power transmission equipment.

<4-6: Modifications of the eaves>
Fig. 8 is an image diagram of a case where grommets for hanging sandbags are provided on the eaves of the waterproof sheet for power transmission equipment according to this embodiment. Note that the same parts as those shown in Figs. 1 to 7 and 9 are given the same reference numerals, and the description of their configurations is omitted.
When the waterproofing sheet 1 for power transmission equipment according to this embodiment has the eaves portion 12 on the sheet 2, the eaves portion 12 may have a weight holding structure (e.g., through holes such as eyelets 8) that enable a weight such as a sandbag 32 to be hung from it, as shown in Fig. 8. In Fig. 8, the sandbag 32 is hung and held from the eyelet 8 formed on the eaves portion 12 via a fixing string 32a.
In this case, even if the location where the waterproofing sheet 1 for power transmission equipment in this embodiment is laid is, for example, a slope, and it is not possible to place a sandbag 32 as a weight near the outer edge 2a of the sheet 2 or on the connection part (connection structure 11) between the sheet 2 and the waterproof sheet 13, the sheet 2 and other waterproof sheets 13 connected to this sheet 2 can be fixed to the ground 33 to be protected by hanging a weight such as a sandbag 32 from a weight holding structure consisting of a through hole such as a grommet 8.

Although not specifically shown, when the eave portion 12 is provided not on the sheet 2 of the waterproof sheet 1 for power transmission equipment in this embodiment, but on the waterproof sheet 13 connected to this sheet 2, a weight holding structure (e.g., eyelets 8, etc.) that enables weights such as sandbags 32 to be hung may be formed in the eave portion 12 provided on the waterproof sheet 13.
In this case too, the effect of fixing the sheet 2 of the waterproof sheet 1 for power transmission equipment in this embodiment and another waterproof sheet 13 connected to this sheet 2 onto the ground 33 to be protected can be achieved.

＜4-7; Other＞
As the sheet 2 in the power transmission facility waterproofing sheet 1 according to this embodiment, a conventionally known resin sheet (such as a blue sheet) can be used without any problems.
Furthermore, the sheet 2 does not have to be limited to a resin sheet as described above, but may be a waterproof cloth sheet.
Furthermore, in this embodiment, the planar shape of the sheet 2 is rectangular (square) as an example, but the planar shape of the sheet 2 may be any shape other than rectangular.
In other words, the outer shape (planar shape) of the sheet 2 may be set as desired depending on the shape of the periphery of the base of the power transmission facility to be protected.

Furthermore, in this embodiment, the example is given of the case where the waterproof sheet 1 for power transmission equipment is to be attached to the foundation 31 of the tower leg 30, but it can also be used without any problems to protect the ground around the base of a utility pole, for example.
In this case, it is advisable to use a sheet 2 having a confirmation circle 10 displayed thereon according to the intended use of the waterproof sheet 1 for power transmission equipment according to this embodiment.
In addition, in this embodiment, the example is described in which the waterproof sheet 1 for power transmission equipment is used to protect the ground around the base of a steel tower and a utility pole, which are power transmission equipment. However, the installation target of the waterproof sheet 1 for power transmission equipment of the present invention does not have to be limited to power transmission equipment, and it can also be used without any problems to protect the ground around the foundations of columns and the like of wind power generation equipment, etc.

As described above, the present invention is a waterproofing sheet for power transmission equipment that can reduce the number of waterproof sheets required to protect a desired area of the ground around the base of the power transmission equipment and reduce the work required to lay them, and can be used in technical fields related to power transmission equipment.

1...Waterproofing sheet for power transmission equipment 2...Sheet 2a...Outer edge 3...Hole 3a...Edge 4...Slit 5...Opening and closing structure 6...Fastener 6a...Element 6b...Slider 6c...Hanging device 7...Circumference adjustment structure 8...Grommet (through hole) 9...String 10...Confirmation circle 11, 11a, 11b...Connecting structure 12...Eaves 13...Waterproof sheet 13a...Outer edge 14...Connecting string 30...Leg 31...Foundation 32...Sandbag (weight) 32a...Fixing string 33...Ground 34...Protective sheet 34a...Edge

Claims (6)

A waterproof sheet for covering the ground around the base of a power transmission facility to protect it from rainwater,
A waterproof sheet;
a hole formed near the center of the sheet for leading out the base of the power transmission equipment onto the sheet;
a cut line connecting the edge of the hole and the outer edge of the sheet;
A waterproof sheet for power transmission equipment, characterized in that it is equipped with an opening and closing structure that opens and closes the slit as desired. The waterproof sheet for power transmission equipment according to claim 1, characterized in that the hole is provided near the edge and has a perimeter adjustment structure for adjusting the perimeter of the hole. The waterproof sheet for power transmission equipment according to claim 1 or 2, characterized in that the opening and closing structure is a fastener. The waterproof sheet for power transmission equipment according to claim 1 or 2, characterized in that the surface of the sheet displays a circle centered on the center of the hole and having an arbitrary laying radius. The waterproof sheet for power transmission equipment according to claim 1 or 2, characterized in that the sheet has a connecting structure for connecting another waterproof sheet to at least a portion of the outer edge of the sheet. The waterproof sheet for power transmission equipment according to claim 5, characterized in that the sheet or the waterproof sheet has a canopy portion that covers the connecting structure.

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