JPS62107120A - Life-line laying structure - Google Patents

Abstract

PURPOSE:To obtain a life-line with few dangers by disposing a first through accommodating communication cables, power cables and water supply pipes and a second trough accommodating gas pipes, into roads. CONSTITUTION:A U-shaped trough main body comprising a bottom wall 102 and side walls 103 is buried into a road, and inside the trough, a communication cable T, a high tension power cable EL and a water supply pipe W are disposed to form a first trough 101. And at the side of the trough, a U-shaped trough main body is buried and, at the lower part inside thereof, a gas pipe G is disposed in the state of being buried in the sand to form a second trough 201. By this arrangement, it is possible to prevent dangers due to gas leakage since the gas pipe is disposed separately.

Description

Detailed Description of the Invention "Technical Field" The present invention is directed to the installation of lifelines such as communication cables, low-voltage power cables, high-voltage power cables, water supply pipes, and gas pipes, especially underground along roads, for terminal services. This article relates to a lifeline installation structure.

"Prior art and its problems" For example, a structure in which lifelines such as communication cables, low-voltage power cables, high-voltage power cables, water pipes, gas pipes, etc. are consolidated and installed underground is a box-shaped structure with a fixed ceiling. These include supply pipe common ditches that are buried underground in the form of tunnels, and mini-community ditches that are formed by digging into the road surface in the form of a trench and are made up of troughs whose top surface is covered with a lid that can be opened and closed. According to the common ditch system, cables that were previously installed on telephone poles can be placed underground, increasing the above-ground area, and in the event of a water or gas pipe breakage, the ground can be dug. It has the advantage of being able to be repaired without causing any damage.

A supply pipe common ditch has a large-scale structure and a huge construction cost, so its application is extremely limited except in highly developed urban areas. On the other hand, trough-type mini utility ditches require significantly less construction cost than supply pipe utility ditches, and are a type that can be more easily spread over large areas.

Until now, mini utility ditches have been known as CABs (abbreviation for Cable Box Network), which house low-voltage and high-voltage electric cables as well as communication cables such as telephone lines, optical fibers, and CATV cables.

However, since CABs only accommodate power and communication cables, even in areas where CABs have been installed, water pipes, gas pipes, etc. have been buried directly as before. Therefore, when a pipe breaks, it is necessary to dig up the ground, and the lifeline as a whole cannot be said to be streamlined.

``Object of the Invention'' In view of the problems of the prior art described above, an object of the present invention is to provide a lifeline installation structure that is constructed in a trough type with low construction costs and that allows lifelines to be rationally aggregated as a whole. It is in.

"Summary of the Invention" The lifeline installation structure according to the present invention includes communication cables,
A first trough that accommodates a low-voltage power cable, a high-voltage power cable, and a water pipe; and a second trough that accommodates a gas pipe buried in sand; the first trough and the second trough are parallel to each other; The troughs are arranged on the side of the road (on the public-private boundary side), and branch lines of each line extend from the side walls of each trough, and the first
A feature of the second trough is that the portion of the second trough where the branch line extending from the trough to the side of the road intersects has a culvert structure.

In this way, in the present invention, almost all lifelines such as communication cables, low-voltage power cables, high-voltage power cables, water pipes, and gas pipes are consolidated and installed in the trough, making the ground space more spacious. This will save time and effort such as digging up roads. In addition, by burying the gas pipe in sand in a separate trough,
There is no ignition source, air mixing is prevented, and even if gas leaks, an explosion within the trench can be prevented. Furthermore, the second trough is located on the side of the road with respect to the first trough, and the part of the second trough where the branch line extending from the side wall of the first trough intersects is made into a culvert structure. Branch lines can also be freely taken out to buildings installed along the line.

According to a preferred embodiment of the present invention, the water supply pipe is arranged in a dedicated groove formed inside the first trough. The dedicated groove should be connected to an external sewer pipe, etc. As a result, when water leaks from the water supply pipe, the water can flow from the dedicated groove to the external sewer pipe, preventing water from overflowing into the first trough and causing damage to other lines. can.

According to a further preferred aspect of the invention, the communication cable and the low voltage power cable are supported on a rack extending from the inner wall of the first trough, and the high voltage power cable is supported at the bottom of the first trough. A grounding structure is provided at the bottom which is supported and supports the high voltage power cable. By arranging each cable in isolation in this way, it is possible to prevent damage caused by contact between the cables, and by grounding the support part of the high-voltage cable, leakage of high-voltage current is prevented, increasing safety. can be increased.

In carrying out the present invention, it is preferable that the pipes for wiring each lifeline, especially the gas pipes, be made of a flexible material such as low-density polyethylene.

Further, although the lifeline installation structure of the present invention does not include a sewer pipe, the sewer pipe is sloped and uses a gravity flow system, so it is not suitable for a public drain. The sewer pipe is therefore arranged as a separate trench or pipe as before.

"Embodiments of the Invention" As shown in FIG. 1, a lifeline installation structure embodying the present invention includes a first lifeline installation structure that accommodates a communication cable T, a low-voltage power cable EL, a high-voltage power cable EH, and a water supply pipe.
A trough 101 and a second trough 20 that accommodates the gas pipe G.
1. The first trough 101 and the second trough 201 are arranged parallel to each other, and the second trough is located on the side of the road with respect to the first trough.

Referring also to FIG. 2, the first trough 101 has a U-shaped trough body with side walls 103 vertically erected from both sides of the bottom wall 1 (12) and the side walls 103 reinforced by ribs 104. , an inner lid 105 is placed on the upper end of the side wall 103 so as to be openable and closable.In this case, both side edges 105a of the inner lid 105 fit into the outer surface of the upper end of the side wall 103 to prevent sand etc. from entering. The structure is such that the side wall 1
Upper beams 106 connecting the upper ends of the 03 are provided at predetermined intervals along the groove direction, and the inner lid 105 connects to the upper beams 108.
Racks 107 and 108 extend from the inner surfaces of the two side walls 103, each of which supports the load auxiliary, and are formed in multiple stages.
A communication cable T is installed on the rack 7, and a low voltage power cable EL is installed on the rack 10B on the other side wall. A dedicated groove 108 for accommodating the water pipe W is provided in the upper part of one side of the bottom wall 102. Exclusive groove! 09 is arranged in the shape of a U-shaped rib on the bottom wall 102, and the receiver with one end extending upward is supported by a stand 110, and the receiver is supported by one end of the stand 110 extending upward, while It is composed of a partition plate 111 that forms a groove between the side wall 103 and a lid 112 that can be opened and closed over the groove. and,
For water supply pipes, the receiver is installed on a stand 110 and a dedicated groove 10 is installed.
It is housed within 8. Note that the receiver stands 110 are arranged at predetermined intervals along the groove direction. And dedicated groove 1
09 is branched at an appropriate location and connected to an external sewer system (not shown). At the top of the other side of the bottom wall 102,
A nozzle stand 113 is provided on which a high-voltage power cable EH is installed. This nozzle stand 113 is grounded by a ground wire 114 to prevent danger in the event of electrical leakage from the high voltage power cable EH. Branch line T' of communication cable T
, the branch line EL' of the low-voltage power cable EL, the branch line EL' of the water supply pipe, and the high-voltage/electric cable E)I
The branch line EH' is the insertion hole 10 of one side wall +03.
3a to the outside. in this way,
The lines are isolated from each other, and their branch lines are taken out to the side of the road through one side wall 103.

Note that the bottom wall 102 and side walls 10 that constitute the trough body
A stepped portion 115 is formed on the end surface of No. 3 to fit into the other end surface to be connected. In addition, a U-shaped joint may be attached to the outer periphery of this connection part to allow a certain degree of elongation in the event of an earthquake. Note that the branch line of each line is connected to the road through the other side wall 103. It may also be extended toward the center. Each is taken out to the outside.

Also, the branch lines T°, EL', E)! ' is actually wired inside a low-density polyethylene pipe.

On the other hand, the second trough 201 has a main body part 202) branch part 2
03 and an underdrain section 204, which are connected as appropriate in the groove direction. As shown in FIG. 3, the main body portion 202 has a U-shaped cross section surrounded by a bottom wall 205 and a side wall 206, and the bottom inner surface 207 is cylindrical.

The gas pipe G is installed on pedestals 208 having a fan-shaped cross section and arranged at predetermined intervals along the groove direction at the bottom.

In this case, the groove is filled with sand. Note that the upper opening of the groove is covered with a shell M 209 that can be opened and closed. Further, as shown in FIG. 4, the branch portion 203 is surrounded by a bottom wall 21O1 side walls 211, 212 and an upper wall 213. The gas pipe G is suspended and supported by a hanger 214 hanging from the upper wall 213. A branch line G° branched from the gas pipe G is connected to one side wall 21.
It is taken out through 2. In this case, a valve 215 is provided at the base of the branch line G', and this valve 215 is connected to the valve pit (21) formed on the upper wall 213.
It can be operated from the ground through B. A lid 217 is placed over the upper opening of the valve pit 21111 so as to be openable and closable. Furthermore, the culvert section 204 has a fifth
As shown in the figure, it has a cylindrical body surrounded by a bottom wall 218, both side walls 219, and a top wall 220. And gas pipe G
is suspended and supported by a hanger 221 hanging from an upper wall 220. As shown in FIG. 1, the communication cable branch line D and the low-voltage power cable branch line EL' extending from the first trough pass above this culvert section 204 and are pulled out to the side of the road. Further, the branch line W° of the water supply pipe and the branch line El' of the high-voltage power cable extending from the first trough pass below this culvert portion 204 and are drawn out to the side of the road. Note that main body portion 202) branch portion 203. A rib 222 (see FIG. 1) is formed on one end surface connecting the underdrain part 204,
A step portion that fits into the rib 222 is formed on the other end surface. In addition, as in the case of the first trough, this connection part also has a U that allows for a certain degree of elongation in the event of an earthquake, etc.
A shaped joint may be added to the outer periphery.The gas pipe G is made of low-density polyethylene.

FIG. 6 shows an example of a road cross section to which the lifeline installation structure of the present invention is applied. In this example, a first trough 101 and a second trough 201 are arranged parallel to each other on both sides of the road R, and both of the second troughs 201 are located laterally than the road R. A sewer pipe DI for sewage is buried between the first trough 101 and the second trough 201, and this sewer pipe D1 can be repaired from the ground through manholes 301 provided here and there along the road R. It is now possible to perform the following tasks. A rainwater sewer pipe D2 is buried in the center of the road R.
Manholes 302 are provided here and there along the road to allow repairs and other work to be carried out from the ground.

In the above configuration, in this lifeline installation structure, 1 communication cable T, low-voltage power cable EL, high-voltage power cable EH1 and water supply pipe are housed in the first trough 2101, and gas pipe G is housed in the second trough 201. This allows each lifeline to be installed underground, allowing for wider use of road space. Also, the first trough 1.01
By removing the inner cover 105 and the inner cover 209 of the second trough 201, it is possible to enter the interior of each trough from the ground, so there is no need to dig up the road R during repair work due to damage to each lifeline. In addition, the system adopts a trough format that is easy to construct and use, and because each lifeline is installed centrally, construction costs are low and it can be disseminated to a wide range of areas. Since only the gas pipe G is buried in sand in the separately provided second trough 201, the ignition source and air are cut off, thereby minimizing the risk of gas leakage. In addition, the portions from which the branch lines T°, EL', H°, and EH' are taken out from the first trough 101 are the underdrain portions 204 in the second trough 201.
Each branch line can be taken out straight to the side of the road R. Furthermore, in the above embodiment, since the water supply pipe 1 is arranged in the dedicated groove 109 of the first trough 101, if water leaks from the water supply pipe, the water will flow into the dedicated groove 109.
It is possible to prevent the other lines in the first trough 101 from breaking down by being washed away to an external sewer pipe or the like. Furthermore, since the lines in the first trough 101 are installed isolated from each other, failures due to mutual influence are prevented.

"Effects of the Invention" As explained above, according to the present invention, since each lifeline is consolidated and installed underground, road space can be widely used and there is no need to dig up the road when repairing damage. It disappears. In addition, the trough type design is easy to construct and use, making it highly popular. Furthermore, gas pipe G
Since the gas is buried in sand in a separate second trough, the risk of gas leakage can be prevented. In addition, the branch line from the first trough can be taken out straight to the side of the road through the outside of the culvert part of the second trough.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the lifeline laying structure according to the present invention, and Fig. 2 is a perspective view showing a first embodiment of the lifeline laying structure.
3 is a sectional view showing the main body of the second trough of the same lifeline installation structure; FIG. 4 is a sectional view showing the branching part of the second trough of the same lifeline installation structure; The figure is a cross-sectional view showing the culvert part of the second trough of the same lifeline laying structure, and FIG. 6 is a cross-sectional view showing an example of a road to which the same lifeline laying structure is applied. In the figure, 101 is a first trough, 102 is a bottom wall, 103 is a side wall, 105 is an inner lid, 107 and 108 are racks, and 10
8 is a dedicated groove, 201 is a second trough, 202 is a main body part, 2
03 is the branch part, 204 is the culvert part, 205 is the bottom wall, 20B
is the side wall, 209 is the inner lid, 210 is the bottom wall, 211, 21
2 is the side wall, 213 is the top wall, 215 is the valve, 218 is the valve pit, 218 is the bottom wall, 218 is the side wall, 220 is the earth wall, T is the communication cable, To is the branch line of the communication cable, EL is the low voltage power cable , EL' is a low-voltage power cable branch line, EH is a high-voltage power cable, EH' is a high-voltage power cable branch line, So is a water pipe, Wo is a water pipe branch line, G is a gas pipe, G. is the branch line of the gas pipe. Patent applicant Yoshi 1) Minoru Agent Patent attorney Shigedo Matsui Patent attorney Kunio Miura Figure 2 Figure 3 Figure 4 Figure 5

Claims (3)

[Claims] (1) A first trough that accommodates communication cables, low-voltage power cables, high-voltage power cables, and water pipes, and a second trough that accommodates gas pipes buried in sand, the first trough and the second trough being parallel to each other. In addition, the second trough is arranged on the side of the road (on the public-private boundary side), and the branch line of each line extends from the side wall of each trough, and the second trough is located on the side of the road (on the public-private boundary side). A lifeline laying structure characterized in that a portion of the second trough where the branch line extending laterally intersects has an underdrain structure. (2) The lifeline installation structure according to claim 1, wherein the water supply pipe is arranged in a dedicated groove formed inside the first trough. (3) In claim 1 or 2, the communication cable and the low voltage power cable are connected to the first
The high voltage power cable is supported on a rack extending from the inner wall of the trough, and the high voltage power cable is supported at the bottom of the first trough, and a grounding structure is provided at the bottom supporting the high voltage power cable. Lifeline laying structure.