JP2011026812A - Method for constructing service pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for constructing a service pipe, which reduces a traffic jam by shortening a construction period. <P>SOLUTION: This method for constructing the service pipe is characterized as follows: mains 11, 12 and 13 for waterworks, sewageworks and city gas, which are buried under a road, are put into a visible state; one pit 15 elongated in a homesite direction is excavated in the road; all the service pipes 21, 22 and 23 for connecting the mains 11, 12 and 13 and a homesite together are connected to the mains 11, 12 and 13, and arranged in the pit 15; subsequently, the pit 15 is backfilled; and thus, the traffic jam associated with construction work is reduced by shortening the construction period. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a construction method for constructing a plurality of main pipes such as water pipes buried under a road, respectively.

  Mains such as waterworks, sewage and city gas are usually buried under roads (mainly public roads). And by using the method etc. of patent document 1 etc. to these main pipes, a draw-in pipe is connected and water supply etc. can be utilized in each house.

  Also, in areas where undergrounding of electric wires has been carried out, communication lines such as telephone lines, optical communication lines, cable broadcasting lines, etc., power lines, etc. are also buried under the road, and lead-ins are also provided for them. So it can be used in each house.

  However, the construction of the service pipes and service lines for each house involves excavating the road, so it was necessary to regulate traffic when performing the work. In addition, as shown in FIG. 7, these constructions include excavation of the pits 97, 98, 99, etc. separately according to the schedules determined by the respective contractors for their convenience. Therefore, when a new house is provided, road excavation and backfilling are repeated each time construction is provided for the main pipes 91, 92, 93. In addition to the long period of time, every time excavation and backfilling, the excavated residual soil and the backfilling soil had to be carried out. In addition, traffic was restricted at every construction, resulting in traffic congestion.

  Here, the amount of carbon dioxide emissions associated with traffic congestion will be explained. The amount of carbon dioxide emissions per hour during idling is 510 g for a gasoline engine passenger car, and a heavy-duty diesel engine truck with a loading capacity of 10 tons. It is said that it is 940g-1300g. Therefore, in a traffic jam of 250m to 300m, 15 passenger cars, 10 small truck class cars with a loading capacity of 2 tons, 5 medium truck class cars with a loading capacity of 4 tons and a large truck with a loading capacity of 10 tons. Assuming that three cars of class (including buses) are each idling for 10 minutes, a total of 2,880 g to 3,480 g of carbon dioxide will be discharged due to traffic congestion. For this reason, when such traffic congestion occurs for 8 hours due to construction work for installing service pipes such as water supply, there are some fluctuations depending on the traffic volume, etc., but about 150,000 g (about 0.15 tons). ) Of extra carbon dioxide. Therefore, under these conditions, a new house will be provided separately with a service pipe from the mains of waterworks, sewerage and city gas, and a communication line and a service line from the power line. In such a case, the road must be excavated and backfilled for each construction, and the resulting traffic congestion will result in an extra 0.75 tonnes of carbon dioxide.

On the other hand, there are about 60,000 water supply works in the Tokyo metropolitan area annually, of which about 80% are assumed to be water supply work to newly built houses. Then, in Tokyo Metropolitan area, the number of new houses, etc. will be about 48,000 annually. Therefore, under the above conditions, if all of the new constructions within the Tokyo metropolitan area, such as water pipes and other five constructions, were separately performed, due to traffic congestion, approximately An extra 36,000 tons of carbon dioxide will be emitted.
In addition, the number of new water supply works in the city of Yokohama is about 10,000 a year. Therefore, under the above conditions, if all five constructions such as water supply pipes are carried out separately in all of the newly established houses in Yokohama City jurisdiction, the annual traffic will be reduced due to traffic congestion. An extra 7,500 tons of carbon dioxide will be emitted.
In addition, the number of new water supply works for residential buildings in Chiba Prefecture is about 30,000 annually. Therefore, under the above conditions, if all five new constructions such as water supply pipes are carried out separately in all of the houses newly established in Chiba Prefecture jurisdiction, the annual traffic will be reduced due to traffic congestion. An excess of 22,500 tons of carbon dioxide will be discharged.

  In this way, a large amount of carbon dioxide is excessively discharged due to traffic congestion associated with the construction of installing a lead-in pipe or the like in a water pipe or the like buried under the road.

JP 2000-73438 A

  Then, an object of this invention is to provide the construction method of the lead-in pipe which shortens a construction period and reduces traffic congestion.

  In order to solve the above-mentioned problems, the construction method of the present invention excavates a single pit in the road, which makes the main water, sewer and city gas pipes buried under the road visible and extends in the direction of the house. Then, after all the lead-in pipes connecting the main pipe and the home are connected to the main pipe and disposed in the pothole, the pothole is backfilled to shorten the construction period, and the traffic accompanying the work It is characterized by reducing traffic congestion.

  In addition, since the construction period can be shortened, it is preferable to refill the pothole after connecting the cable buried under the road and the house and connecting the cable to the cable in the pothole. .

  Furthermore, when a cable includes a plurality of communication lines, it is possible to prevent a plurality of service lines connecting the communication line and the house from being drawn, so that the service lines connecting the plurality of communication lines and the house are service lines. It is preferable to pass through the inside of a protective tube provided with a socket for incoming line in which a plurality of through-holes are inserted.

  The aspect of each element in the present invention is exemplified below.

  The embedded cable is not particularly limited, but examples thereof include a telephone line, an optical communication line, a communication line such as a cable broadcasting line, a power line, and the like.

  ADVANTAGE OF THE INVENTION According to this invention, the construction method of the lead-in pipe which shortens a construction period and reduces traffic congestion can be provided.

It is a cross-sectional schematic diagram of a pothole vicinity of Example 1 of this invention. It is a plane schematic diagram near the same hole. It is a cross-sectional schematic diagram of the pothole vicinity of Example 2 of this invention. It is a plane schematic diagram near the same hole. It is the cross-sectional schematic diagram and the plane schematic diagram which show the embedding state of the protection pipe | tube of the communication lead-in line in a house. It is a perspective view of a socket for incoming lines. It is a plane schematic diagram which shows the state of the conventional construction for providing a drawing tube.

  The construction method of the lead-in pipe of Example 1 of this invention is demonstrated using FIG. 1, FIG. The present embodiment is a construction in which service pipes 21, 22, and 23 are provided in order to draw each of waterworks, sewerage, and city gas into the house.

  As shown in FIG. 1, the main water supply pipe 11, the sewer main pipe 12, and the city gas main pipe 13 are embedded under a public road (roadway) whose surfaces are paved with asphalt concrete 19. In addition, the main water supply pipe 11 is located about 0.6 m deep about 1.2 m from the end of the road, which is the public-private boundary 10, and the sewer main pipe 12 The city gas main 13 is about 0.75 m at a depth of about 1.4 m from the end of the road. However, in the present embodiment, all the mains are buried under the roadway, but the mains may be buried under the sidewalk. Even when the main is buried under the sidewalk, traffic restrictions may be imposed to secure pedestrian paths and the like.

  In each of the three main pipes 11, 12, 13 buried in this way, three lead-in pipes 21, 22, 23 connected to one house were provided as follows.

  As shown in FIGS. 1 and 2, first, the buried main pipes 11, 12, and 13 are made visible, and the potholes 15 for arranging the lead-in pipes 21, 22, and 23 are excavated. . Specifically, the asphalt concrete 19 provided on the surface where the hole 15 is excavated was crushed and removed using a rock drill or the like, and then the hole 15 was excavated using a hydraulic excavator or the like. The pothole 15 is in contact with the house, and the size thereof is about 4.5 m in the width direction of the road, and the length in the length direction of the road is between the site inside the house and the middle side of the road. Unlike the site, the length of the site inside the house was about 1.1 m, and the length of the site on the middle side of the road was about 0.75 m. Note that the pothole 15 is provided with a step on the bottom surface in order to reduce the amount of earth and sand to be dug.

  Next, branch portions 16, 17, and 18 for connecting the lead-in pipes 21, 22, and 23 are provided in the main pipes 11, 12, and 13, and then the lead-in pipes 21, 22, and 23 are connected to the branch portions 16, 17 respectively. , 18 and arranged in the pothole 15 so that the horizontal interval is about 0.3 m. Specifically, a branch 16 is provided in the main water supply pipe 11, and a water supply inlet pipe 21 is connected to the branch 16. The sewer main pipe 12 is provided with a branch portion 17, and a sewer inlet pipe 22 is connected to the branch portion 17. A branch 18 is provided in the city gas main pipe 13, and a city gas lead-in pipe 23 is connected to the branch 18. Each lead-in pipe 21, 22, 23 is connected to the house in contact with the pothole 15, and the water supply lead-in pipe 21 includes a valve 21 a in the middle.

  Then, after filling the pothole 15 with the earth and sand for backfilling carried in, the surface was paved with asphalt concrete 19 and the construction was completed.

According to this example, the following effects were obtained.
・ It was possible to shorten the construction period compared to the case where construction for installing service pipes such as water supply was carried out separately. Specifically, when the work for installing the water and sewage service pipes and the work for installing the city gas service pipes are performed separately, it takes about 3 hours and 30 minutes to perform excavation work, backfill work, etc. Since it was once, it could be done in 2 hours and 15 minutes, and the construction period was shortened by about 1 hour and 15 minutes.
・ In addition, due to the shortening of the construction period, the time for traffic regulation was reduced, and the traffic congestion associated with the construction could be reduced compared with the case where construction works with water supply pipes were carried out separately.
・ The number of workers could be reduced compared to the case where construction works for installing service pipes such as water supply were carried out separately. Specifically, if the work for installing the water and sewage service pipes and the work for installing the city gas service pipes are performed separately, the excavation work, etc. will be carried out once, instead of taking 12 people. Since the construction was completed in a day, work such as excavation and traffic control was reduced, and 9 people could do it, and 3 people fewer.
・ The number of vehicles to be used could be reduced compared to the case where construction works for installing service pipes such as water supply were carried out separately. Specifically, when the work for installing the water and sewage service pipes and the work for installing the city gas service pipes are carried out separately, the excavation work involves transporting hydraulic excavators and compressors for rock drills. It is necessary to have a vehicle for transporting unloading soil, unloading excavated soil, and transporting earth and sand for backfilling, and a total of 8 units will be used, because excavation work etc. has been performed once, so 4 units will be used. The number was reduced.
・ Also, by reducing the number of vehicles used, it was possible to reduce the carbon dioxide emissions associated with construction from about 56.0 kg to about 37.0 kg.
- In addition, is carried out, to 0.19 m ³ the asphalt concrete from 0.3 m ^3, it could also reduce each excavated soil from 6.9 m ³ to 5.0 m ^3.

  The construction method of the lead-in pipe of Example 2 of this invention is demonstrated using FIG. 3, FIG. In the present embodiment, in addition to the construction of providing the intake pipes 21, 22, and 23 for drawing each of the water supply, sewerage, and city gas of the first embodiment into the house, a power lead-in line 31 is provided for drawing the electric power into the house. The work was done. Therefore, the construction for providing the lead-in pipes 21, 22, and 23 is the same as that in the first embodiment, and the provision of the lead-in wire 31 is different from that in the first embodiment.

  Specifically, as shown in FIGS. 3 and 4, the lead-in line 31 from the power line 32 in the common groove 30 such as an electric wire embedded under the road is approximately 1 in the horizontal direction from the city gas lead-in pipe 23. The hole 15 was excavated so as to be provided at a distance of 4 m. Then, the lead-in wire 31 was connected to the power line 32 of the common groove 30 such as an electric wire and disposed in the pothole 15, and then the pothole 15 was refilled.

According to this example, in addition to the effect obtained in Example 1, the following effect was obtained.
-The construction work for installing the power lead-in line was also carried out together, so that the construction period could be further shortened compared to the case where the construction work for installing the power lead-in line was performed separately.
・ In addition, the shortening of the construction period reduced the time for traffic regulation, and it was possible to further reduce the traffic congestion associated with the construction compared to the case where the construction for installing the power supply line was performed separately.

  The construction method of the lead-in line of Example 3 of this invention has two communication lines, such as a telephone line, in the common groove | channel 30, such as an electric wire of Example 2, and the two lead-in lines of communication which connect each communication line and the house. It was the construction that installed. Accordingly, the construction under the road is almost the same as that of the second embodiment, but differs from the second embodiment in that two communication service lines 40 are drawn into the house.

  Specifically, the two lead-in wires 40 are passed through a flexible cylindrical protective tube 43 embedded in the house as shown in FIG. The protective tube 43 includes a relay box 41 having an inner space 42 for making the lead-in wire 40 slack, and two incoming sockets 48 provided at a distance of about 1 m from each other. As shown in FIG. 6, the inlet socket 48 has a partition wall 46 in which four through holes 45 for inserting the lead-in wire 40 are provided, and is provided in the middle in the length direction. 47 is divided into two cylinders. The two lead wires 40 are inserted into different through holes 45, respectively.

According to this example, in addition to the effect obtained in Example 2, the following effect was obtained.
・ By constructing the communication service line together, the construction period could be shortened compared to the case where the communication service line was installed separately.
・ By passing two lead wires through a protective tube equipped with a socket for incoming wires, it was possible to prevent the lead wires from being twisted.

  The present invention is not limited to the above-described embodiments, and can be modified and embodied as appropriate without departing from the spirit of the invention.

11 Main (water supply)
12 Main (Sewer)
13 Main (city gas)
15 pothole 21 service pipe (water supply)
22 service pipe (sewer)
23 Service pipe (city gas)
30 Common grooves such as electric wires 31 Service lines (electric power)
32 power line 40 service line (communication)
43 Protection tube 45 Through hole 48 Socket for incoming wire

Claims (3)

  All water pipes that connect the main pipe to the house are excavated in the road by making one pit that extends in the direction of the house, while making the main water, sewer, and city gas main pipes buried under the road visible. A method for constructing a lead-in pipe characterized in that after being connected to the main pipe and disposed in the pothole, the pothole is backfilled to shorten the construction period and reduce traffic congestion associated with the work.   The construction method of the lead-in pipe according to claim 1, wherein after the lead-in wire connecting the cable buried under the road and the house is connected to the cable and disposed in the pothole, the pothole is refilled.   When the cable includes a plurality of communication lines, the plurality of service lines that connect the plurality of communication lines and the home includes an entry socket in which a plurality of through holes for inserting the service lines are formed. The method for constructing a lead-in pipe according to claim 2, which passes through the inside of the protective pipe.

Images