JP2023003504A - Trough and cable burying method using the same - Google Patents

Abstract

To provide a technique capable of effectively promoting cable burying.SOLUTION: A trough 10 has a function as a drain side ditch and a function for housing cables. The trough 10 comprises a trough body 11 including a bottom wall 12, a pair of side walls 13, 14, and an upper wall 17 and a panel member 30 which extends across the pair of side walls 13, 14 and of which the top face has cables 50. In the interior space of the trough body 11, a space under the panel member 30 functions as a drain space S1 and a space over the panel member 30 functions as a cable housing space S2.SELECTED DRAWING: Figure 5

Description

The present disclosure relates to a trough body and a method of undergrounding cables using the trough body.

In recent years, for the purpose of improving the scenery of urban areas and ensuring safety in the event of a disaster, various cables such as power transmission cables, communication cables, and optical fiber cables are stored in utility utility tunnels and buried in the ground. The undergrounding of electric wires to eliminate utility poles is underway. Structures made of precast concrete or synthetic resin are used for such electric wire common grooves (see Patent Documents 1 and 2, for example).

JP 2013-150460 A JP 2011-061997 A

The common electric cable ditch is generally buried under the sidewalk. For this reason, for example, on roads with short sidewalks or narrow roads without sidewalks, there is a problem that it is difficult to secure a sufficient space for burying electric wires in a public utility tunnel, making it difficult to bury electric wires underground. In addition to the high cost of construction of a common electric line tunnel, when installing a common electric line tunnel on a road, there is also the problem that construction and maintenance that accompanies traffic closures are required.

On the other hand, drainage gutters are installed at the side edges of roads for the purpose of draining rainwater and the like. If such a drainage ditch can be used also as a common electric wire ditch, it is expected that the undergrounding of electric wires can be promoted more effectively even on roads with short sidewalk widths and narrow roads.

In addition, due to the recent increase in demand for electric vehicles and the like, there is a demand for the installation of a running power supply system that supplies power to a running vehicle. If a drainage ditch can also be used as a common electric line ditch, it will be possible to add additional functions to the road, such as the ability to effectively transmit power to the power supply system while driving, and it is expected to contribute to the spread of electric vehicles and technological progress. be done.

The present disclosure has been made in view of the above circumstances, and an object thereof is to provide a technique capable of effectively promoting undergrounding of electric wires while ensuring drainage.

The trough body of the present disclosure is a trough body having a function as a drainage gutter and a function for storing cables, and is defined by a bottom wall portion, a pair of side wall portions facing each other, and an upper wall portion. and a panel member that spans between the pair of side wall portions and on which the cables are laid on the upper surface, wherein the panel member out of the internal space of the trough body A space below the panel member functions as a drainage channel space, and a space above the panel member functions as a cable storage space.

Moreover, it is preferable that the bottom wall portion and/or the pair of side wall portions are formed with a drain hole through which water in the drain space is discharged to the outside of the trough body.

Moreover, it is formed so as to protrude upward from the bottom wall portion, and faces the inner surfaces of the pair of side wall portions, respectively, and divides at least a part of the drainage space into a first drainage channel and a second drainage channel. It is preferable that a projecting portion is further provided, and the projecting portion supports the lower surface of the panel member on which the cables are laid.

Moreover, it is preferable that the panel member is formed in a permeable porous or mesh shape through which water can pass.

Moreover, it is preferable to further include a locking mechanism that locks the end portion of the panel member to the inner surface of the side wall portion.

Moreover, it is preferable to further include a partition plate attached to the upper surface of the panel member and partitioning the cable storage space into a first storage space for high power wires and a second storage space for low power wires.

Moreover, it is preferable that the upper wall portion is formed separately from the trough body and is a lid member that can be fitted between the upper end portions of the pair of side wall portions.

Further, it is preferable that the lid member is provided with a water-permeable non-slip member that allows water to permeate from the upper surface to the lower surface of the lid member.

Further, it is preferable that the trough body is made of synthetic resin.

The method of the present disclosure is a method for undergrounding cables using the trough body, comprising the steps of placing and burying the trough body in a groove excavated at the side edge of a road; and a step of passing the cables through a space above the panel member in the trough body and laying them on the upper surface of the panel member. .

According to the technology of the present disclosure, undergrounding of electric wires can be effectively promoted.

FIG. 3 is a schematic exploded perspective view showing a trough body according to the embodiment; FIG. 4 is a schematic perspective view showing another curved trough body according to the present embodiment. FIG. 4 is a schematic perspective view showing another example of the trough body according to the present embodiment; FIG. 4 is a schematic perspective view showing a connecting structure in which a plurality of trough bodies according to the present embodiment are connected; It is a typical sectional view showing a trough body concerning this embodiment. It is a schematic diagram explaining the 1st process of the undergrounding method of cables using the trough body which concerns on this embodiment. It is a schematic diagram explaining the 2nd process of the undergrounding method of cables using the trough body which concerns on this embodiment. It is a schematic diagram explaining the 3rd process of the undergrounding method of cables using the trough body which concerns on this embodiment. It is a schematic diagram explaining the 4th process of the undergrounding method of cables using the trough body which concerns on this embodiment. FIG. 11 is a schematic perspective view showing a trough body according to another embodiment; FIG. 10 is a schematic perspective view showing a protrusion of a trough body according to another embodiment, with a part of the trough body cut away.

A trough body according to the present embodiment and a method for undergrounding cables using the trough body will be described below with reference to the accompanying drawings. The same parts are given the same reference numerals, and their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

[trough body]
FIG. 1 is a schematic exploded perspective view showing a trough body 10 according to this embodiment. In this embodiment, the trough body 10 is a container having at least a bottom wall portion and a side wall portion capable of accommodating cables, and also functions as a drainage gutter buried at the side edge of a road. In the following, for convenience of explanation, the longitudinal direction of the road is defined as the longitudinal direction, and the width direction of the road is defined as the width direction.

As shown in FIG. 1, the trough body 10 includes a trough body 11 that functions as a drainage channel and a cable storage space, a trough lid 20 that closes the trough body 11, and a panel 30 for laying cables.

The trough main body 11 and the trough lid 20 are preferably made of synthetic resin and molded by press molding, injection molding, or the like. Here, the trough main body 11 and the trough lid 20 may be made of precast concrete, but by making them made of synthetic resin, it is possible to obtain a linear shape as shown in FIG. 1 and a curved shape as shown in FIG. Alternatively, it becomes possible to easily cope with various variations according to the road shape, such as a Y-shaped or T-shaped branch shape when viewed from above. In addition, by making it made of synthetic resin, it is possible to improve the workability by reducing the weight.

Note that the present disclosure does not exclude the trough body 10 from being made of precast concrete. Whether the trough body 10 is made of synthetic resin or made of precast concrete can be appropriately selected according to various conditions such as the surrounding environment of the road to be installed, the ground condition, the number and type of cables to be stored, and the like.

A trough body 11 shown in FIG. 1 has a substantially U-shaped cross section with an open top, and has a bottom wall portion 12 and a pair of first and second side wall portions 13 and 14 . The first and second side walls 13 and 14 face each other at a predetermined interval in the width direction, and stand upward from the width direction end portions of the bottom wall portion 12 . In the following description, the side where the side walls 13 and 14 face each other is called the inside, and the opposite side is called the outside.

First and second stepped portions 15 and 16 formed by notching inner upper corner portions of the side wall portions 13 and 14 are provided at upper end portions of the side wall portions 13 and 14, respectively. The stepped portions 15 and 16 are provided on the upper ends of the side wall portions 13 and 14 over the entire length of the trough body 11 in the longitudinal direction. The upper opening of the trough main body 11 can be closed by fitting the widthwise end portions of the trough lid 20 into the stepped portions 15 and 16 and seating them.

A male fitting portion 11A and a female fitting portion 11B are provided at both ends of the trough body 11 in the longitudinal direction. The male fitting portion 11A is formed in a convex shape that protrudes outward from the trough body 11, and the female fitting portion 11B is formed as a groove that opens to the inside of the trough body 11. As shown in FIG. By fitting the male fitting portion 11A into the female fitting portion 11B of another adjacent trough body, the trough bodies 11 adjacent to each other in the longitudinal direction can be connected. It should be noted that the structure for connecting the trough bodies 11 is not limited to the male-female fitting structure of the illustrated example, and it is possible to apply other connecting structures.

Here, the connection structure for connecting a plurality of trough bodies 10 in the longitudinal direction is not only the trough body 10 having the trough lid 20 shown in FIG. 1, but also the trough body 10' having no trough lid as shown in FIG. Built together. A trough body 10' shown in FIG. The structure of is substantially the same as that of the trough body 10 . When constructing the connecting structure, as shown in FIG. 4, one trough body 10 is arranged at predetermined intervals with respect to a plurality of trough bodies 10' connected continuously in the longitudinal direction. The interval at which the trough body 10 is arranged may be set within a range such as 15 to 20 m, for example, within a range where cables can be routed through the upper opening of the trough body 11 and the inside can be cleaned.

As shown in FIG. 1, the trough lid 20 is formed in a substantially rectangular plate shape, and a non-slip member 21 having water permeability is provided on the upper surface thereof.

Specifically, as shown in FIG. 5, the non-slip member 21 is formed by filling a recessed portion 22 recessed to a predetermined depth from the top surface of the trough lid 20 with aggregate, rubber chips, synthetic resin chips, or the like. It is In addition, the trough lid 20 is provided with a plurality of through holes 23 passing through the bottom of the recess 22 and the lower surface of the trough lid 20, so that rainwater flowing from the road side to the upper surface of the trough lid 20 is prevented from slipping due to water permeability. By passing through the stop member 21 and passing through the through hole 23 , the liquid drops into the inside of the trough body 11 .

By providing the water-permeable non-slip member 21 on the upper surface of the trough lid 20 in this manner, rainwater or the like is reliably collected in the trough main body 11, and a pedestrian walking or running on the upper surface of the trough lid 20 is prevented. It becomes possible to effectively secure the safety of the bicycle. The through hole 23 is not essential, and the non-slip member 21 having water permeability may be provided over the entire length from the upper surface to the lower surface of the trough lid 20 . Also, the structure of the trough lid 20 is not limited to the water-permeable structure shown in the drawings, and other structures that allow rainwater to drop downward, such as grid-like grating, can be applied. Moreover, the non-slip member 21 and the through hole 23 can be provided not only on the trough lid 20 but also on the upper wall portion 17 of the trough body 10' shown in FIG. Alternatively, the non-slip member 21 may be configured by vertically drilling a plurality of through holes through which water passes through a rubber sheet or the like.

As shown in FIG. 5, two drainage channels C1 and C2 are defined in the trough body 11 on the bottom wall portion 12 side. Specifically, the bottom wall portion 12 is provided with a protruding portion 18 that protrudes upward at a predetermined height from a substantially intermediate position in the width direction. In this embodiment, the height of the protrusion 18 is preferably set at approximately half the height of the side walls 13 and 14 . As for the height of the protruding portion 18, it can be set higher than about half the height of the side walls 13 and 14 when securing a wide drainage space, and when securing a wide cable storage space. It may be set lower than about half the height of the side walls 13 and 14 .

The projecting portion 18 extends in the longitudinal direction on the upper surface of the bottom wall portion 12, and includes a first side plate portion 18A facing the inner surface of the first side wall portion 13 and a second side plate portion facing the inner surface of the second side wall portion 14. 18B and an upper plate portion 18C connecting the upper ends of the side plate portions 18A and 18B. The first drainage channel C1 is defined by the inner surface of the first side wall portion 13, the upper surface of the bottom wall portion 12, and the inner surface of the first side plate portion 18A. and the upper surface of the bottom wall portion 12 and the inner surface of the second side plate portion 18B. Note that the number of protrusions 18 is not limited to one, and two or more protrusions 18 may be provided to partition three or more drainage channels. Also, by omitting the projecting portion 18, only one drainage channel may be provided.

Around the first side wall portion 13, the bottom wall portion 12, and the second side wall portion 14, crushed stone CS is spread all over. Further, the first side plate portion 18A and the second side plate portion 18B are separated from each other, and crushed stone CS is also spread between them.

A portion of the first side wall portion 13, the bottom wall portion 12, and the first side plate portion 18A facing the first drainage channel C1, and a second drainage channel C2 of the second side wall portion 14, the bottom wall portion 12, and the second side plate portion 18B A plurality of drain holes 19 are provided in the portion facing the . The drain holes 19 pass through the bottom wall portion 12, the side wall portions 13 and 14, and the side plate portions 18A and 18B, respectively. By penetrating the CS, drainage to the outside can be promoted. By promoting drainage to the outside, it is possible to effectively prevent rainwater from overflowing from the trough body 11 onto the road. In addition, when draining water using the slopes of the drainage channels C1 and C2, the drainage hole 19 may be omitted.

The panel 30 is made of, for example, a synthetic resin or the like in the shape of a rectangular plate, and preferably has flexibility. The panel 30 is preferably formed in a perforated or meshed form permeable to water. The panel 30 is detachably attached to the trough body 11 by engaging both ends of the panel 30 with locking mechanisms 40 such as hooks provided on the first side wall portion 13 and the second side wall portion 14, respectively. ing.

The locking mechanism 40 is provided at a position below the stepped portions 15 and 16 and above the projecting portion 18 on the inner surfaces of the first and second side wall portions 13 and 14 . Both ends of the panel 30 are locked by the locking mechanisms 40, and the panel 30 is spanned between the side walls 13 and 14 in the width direction, so that the internal space of the trough body 11 is a drainage channel below the panel 30. It is divided into a space S1 and a cable storage space S2 above the panel 30. - 特許庁

A plurality of panels 30 may be arranged at predetermined intervals in the longitudinal direction with respect to a connecting structure (see FIG. 4) constructed by connecting a plurality of trough bodies 10 and 10', or Alternatively, a plurality of panels 30 may be attached continuously over the entire length in the longitudinal direction. When the panels 30 are arranged at predetermined intervals, the distance (for example, 1 to 2 m) that allows the cables 50 laid on the upper surface of the panel 30 to be supported without being greatly bent may be used as a reference.

The cables 50 are, for example, a power transmission cable 51 , a communication cable 52 , an optical fiber cable 53 , etc., and are laid on the upper surface of the panel 30 and housed in the trough body 11 . When the cables 50 are laid on the upper surface of the panel 30, the lower surface of the panel 30 is seated on the upper plate portion 18C of the projecting portion 18, so that the cables 50 can be stably supported. Although the panel 30 is preferably seated on the projecting portion 18, the panel 30 may not be seated when the number of cables 50 to be laid is small.

Here, when the power transmission cable 51 of the strong electric line (power supply system) and the communication cable 52 and the optical fiber cable 53 of the weak electric line (communication system) are housed together in the trough main body 11, the magnetic field of the strong electric line, etc. It is necessary to cut off the influence on weak power lines. In the present embodiment, the partition plate 60 divides the cable storage space S2 into a storage space for strong wires (right side in the figure) and a storage space for weak wires (left side in the figure). It is designed to be separated from the weak electric wire.

The partition plate 60 is, for example, a plate material made of synthetic resin or metal, and is easily attached by fitting it into a stand 61 fixed to the upper surface of the panel 30 or the upper surface of the upper plate portion 18C of the projecting portion 18. . The stand 61 is provided with a plurality of recessed grooves 62 in which the partition plates 60 are fitted, and according to the number of the high-voltage electric wires and the low-voltage electric wires, the storage space for the high-voltage electric wires and the storage space for the low-voltage electric wires are divided. It can be adjusted step by step.

The partition plate 60 is not an essential component, and may be omitted when only one of the strong electric wire and the weak electric wire is accommodated in the trough body 11 . Further, the objects to be stored in the trough body 11 are not limited to the cables 50, and it is also possible to store pipes such as water pipes and gas pipes.

[Cable underground method]
Next, a method for undergrounding cables 50 using trough bodies 10 and 10' according to the present embodiment will be described with reference to FIGS. In addition, below, the case where trough body 10,10' is newly installed in the side edge (for example, road shoulder and road side strip) of the road R is demonstrated as an example.

In the first step shown in FIG. 6, a groove G larger than the trough body 10 is longitudinally excavated in the side edge of the road R, and the bottom side of the groove G is covered with crushed stone CS. When replacing the existing side ditch block with the trough body 10 of the present embodiment, the existing side ditch block may be removed. If the existing side ditch block is larger than the trough body 10, the cutting of the groove G may be omitted.

In the second step shown in FIG. 7, the trough body 11 is placed in the groove G and buried in the ground so that the upper end of the trough body 11 substantially coincides with the road surface of the road R. As shown in FIG. Although not shown in FIG. 7, the trough body 11' (see FIG. 3) of the trough body 10' without the trough lid 20 is also arranged and embedded in the groove G while being connected in the longitudinal direction.

In the third step shown in FIG. 8, the panel 30 is attached inside the trough body 11, the cables 50 are routed through the trough bodies 11 and 11' connected in the longitudinal direction, and the routed cables 50 are connected to the panel. Lay on the upper surface of 30. At this time, since the cables 50 are routed while being supported by the upper surface of the panel 30, it is possible to effectively prevent the cables 50 from being caught in the surrounding structures such as the drainage channels C1 and C2. It should be noted that the partition plate 60 may be attached when the cables 50 include both high power lines and low power lines.

In the fourth step shown in FIG. 9, the trough lid 20 is fitted into the upper opening of the trough body 11 to close the upper opening of the trough body 11, thereby completing the undergrounding of the cables 50. As shown in FIG. The cables 50 undergrounded in this manner are housed above the drainage channel space S1 in the trough body 11. - 特許庁For this reason, for example, when trouble such as electric leakage occurs in the cables 50 and replacement or repair is required, the trough lid 20 is removed without cleaning the drainage channels C1 and C2 below the panel 30. Maintenance of the cables 50 can be easily performed by only

In the series of steps shown in FIGS. 6 to 9, the steps from burying the trough bodies 10 and 10' as drainage gutters to undergrounding the cables 50 were continuously performed. It may be assumed that it is not necessary for the time being. In such a case, the trough lid 20 is fitted into the upper opening of the trough body 11 in the second step shown in FIG. It only needs to function as a drainage gutter. When it becomes necessary to put the cables 50 underground, the trough lid 20 is removed and the steps shown in FIG. 8 are used to start the undergrounding of the wires.

According to the trough body 10 of the present embodiment described in detail above, the panel 30 is attached between the side wall portions 13 and 14 of the trough body 11 and spanned in the width direction, so that the internal space of the trough body 11 is larger than the panel 30. It is configured to be divided into a drainage channel space S1 on the lower side and a cable housing space S2 on the upper side of the panel 30. As shown in FIG.

By embedding such a trough body 10 in the side edge of a road such as a road shoulder, the trough body 10 can function as a drainage ditch and can also be used as a common electric wire ditch. It is possible to effectively promote elimination of utility poles even on nonexistent narrow roads. In addition, since the trough body 10 extends in the longitudinal direction along the side edge of the road, it is possible to provide the road with various additional functions such as efficient power transmission to the power supply system while the vehicle is running.

In addition, since the trough body 10 can be used both as a drainage ditch and a common electric wire ditch, the drainage ditch and the common electric wire ditch can be collectively carried out in a single construction work on a new road, reducing construction costs and construction period. can be shortened. In addition, since the trough body 10 is buried at the side edge of the road such as the road shoulder, it is possible to carry out the construction work without causing large-scale traffic closures.

In addition, since the trough body 10 is buried in the road shoulder or the like on the side of the roadway rather than the sidewalk, for example, even if it is necessary to cut down the adjacent sidewalk after installing the trough body 10, the existing trough body It is possible to proceed with the devaluation work of the sidewalk while leaving 10.

In addition, since the interior of the trough body 11 is divided into the lower drainage channel space S1 and the upper cable housing space S2, maintenance of the cables 50 can be performed by simply removing the trough lid 20 and the drainage channels C1, The cables 50 can be easily accessed without cleaning C2, and the drainage channels C1 and C2 can be easily cleaned by inserting a cleaning tool without withdrawing the cables 50 when cleaning the drainage channels R1 and R2. can be cleaned.

[others]
It should be noted that the present disclosure is not limited to the above-described embodiments, and can be appropriately modified and implemented without departing from the gist of the present disclosure.

For example, as shown in FIG. 10, the trough body 10 (trough body 10') can be configured as an L-shaped side ditch that functions as a sidewalk boundary block. Specifically, one of the side walls 13 and 14 of the trough body 11 (the side wall 14 in the illustrated example) may be provided with a curb 60 protruding upward from the side wall 14 . The curb body 60 may be formed integrally with the trough body 11 or may be formed as a separate body that can be attached to and detached from the trough body 11 . Thus, by making the trough body 10 into an L-shaped side ditch, it becomes possible to carry out the construction together with the curbstone.

It is preferable to use a plurality of types of curbstone bodies 60 for pedestrian/vehicle boundary portions (see FIG. 10(A)), for rubbing portions (see FIG. 10(B)), and for drive-in portions (see FIG. 10(C)). . If a plurality of types of curb bodies 60 are used, it is possible to effectively cope with undercutting of sidewalks.

In the above embodiment, the trough body 10, 10' was explained as an example of a drainage gutter buried at the side edge of the road such as a road shoulder. It can also be widely applied to drainage ditches.

Further, in the above embodiment, the protrusion 18 is formed integrally with the bottom wall portion 12 of the trough body 11, but as shown in FIG. It may be provided as a separate structure. In this case, the projecting portion 18 may be made of metal or resin. 11, the projecting portion 18 may be provided over the entire length of the trough body 11 in the longitudinal direction, as indicated by the broken line in FIG. 18 may be intermittently arranged at predetermined intervals in the longitudinal direction of the trough body 11 . By providing the projecting portions 18 intermittently, the first drainage channel C1 and the second drainage channel C2 can be merged at the locations where the projecting portions 18 are intermittent.

DESCRIPTION OF SYMBOLS 10... Trough body, 11... Trough main body, 12... Bottom wall part, 13... First side wall part, 14... Second side wall part, 15... First step part, 16... Second step part, 17... Top wall part, DESCRIPTION OF SYMBOLS 18... Projection part 19... Drainage hole 20... Trough lid 21... Anti-slip member 30... Panel 40... Locking mechanism 50... Cables 60... Partition plate S1... Drain space, S2... Cable Storage space, C1... 1st drainage channel, C2... 2nd drainage channel

Claims (10)

A trough body having a function as a drainage gutter and a function for storing cables,
a trough body having an interior space defined by a bottom wall, a pair of opposed side walls, and a top wall;
a panel member that spans between the pair of side wall portions and on which the cables are laid on the upper surface;
Of the internal space of the trough body, a space below the panel member functions as a drainage channel space, and a space above the panel member functions as a cable storage space. . 2. The trough body according to claim 1, wherein a drain hole is formed through said bottom wall portion and/or said pair of side wall portions to discharge water in said drain space to the outside of said trough body. Projections that protrude upward from the bottom wall portion, face the inner surfaces of the pair of side wall portions, respectively, and divide at least a portion of the drainage space into a first drainage channel and a second drainage channel. It further comprises a part,
3. The trough body according to claim 1, wherein the projecting portion supports the lower surface of the panel member on which the cables are laid. 4. The trough body according to any one of claims 1 to 3, wherein the panel member is formed in a permeable porous or mesh shape through which water can pass. The trough body according to any one of claims 1 to 4, further comprising a locking mechanism that locks the end of the panel member to the inner side surface of the side wall. 6. The partition plate according to any one of claims 1 to 5, further comprising a partition plate attached to the upper surface of the panel member and partitioning the cable storage space into a first storage space for high-voltage wires and a second storage space for low-voltage wires. A trough body according to claim 1. 7. The trough according to any one of claims 1 to 6, wherein the upper wall portion is formed separately from the trough main body, and is a lid member that can be fitted between upper end portions of the pair of side wall portions. body. 8. The trough body according to claim 7, wherein the lid member is provided with a water-permeable non-slip member that allows water to permeate from the upper surface to the lower surface of the lid member. The trough body according to any one of claims 1 to 8, wherein the trough body is made of synthetic resin. A cable undergrounding method using the trough body according to any one of claims 1 to 9,
placing and burying the trough body in a groove cut at the side edge of the road;
mounting the panel member inside the trough body;
and a step of passing the cables through a space above the panel member in the trough body and laying them on the upper surface of the panel member.

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