JPH0984234A - Burying method of multihole pipes by digging - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a burying method of multihole pipes which enables very easy and reliable connection of the multihole pipes in a dig-and-cover method. SOLUTION: A ditch 14 wherein a pipeline is buried is provided by digging the ground surface 13 by a dig-and-cover method. A large number of prefabricated solid-core multihole pipes 1 each having a plurality of small-bore pipelines 2 formed in parallel in the axial direction and having a circular section are inserted in the ditch 14 and connected to each other along the ditch 14 in the axial direction practically with the pipelines 2 of these prefabricated multihole pipes 1 aligned with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of burying a perforated pipe by digging and excavating the ground surface to form a groove, laying a number of pipes in the groove, and filling the groove with earth and sand. is there.

[0002]

2. Description of the Related Art Conventionally, when a large number of small-diameter pipes are buried, as shown in FIG.
A plurality of pipes 22 are inserted into the grooves 21, and these pipes are connected in the axial direction to provide pipes, and a pipe pillow or a pipe base (shown in FIG. Omitted)
Will support these. The earth and sand are then backfilled into the groove 21 from above these pipes to bury the pipes.

According to this method, a large number of pipes 22 are connected to each other in a cut groove 21. Each of these pipes is supported by a pipe pillow or a nozzle so as to be spaced apart from each other. These arrangements require time and effort for these pipes. The pipe 22 and the pipe 22
In order to provide a joint at the connection point between the pipes, it is necessary to increase the distance between the pipelines, and therefore, there is a disadvantage that the cross-sectional area of the entire multi-row pipeline becomes large. Furthermore, it is difficult for soil to enter between and below the pipes 22 when the soil and the sand are backfilled, voids are likely to be generated in these places, and there is a possibility that the road surface will sink or collapse after the pipes are buried. Therefore, as shown in FIG. 16, solid prefabricated porous tubes 24 having a rectangular cross section in which a large number of small-diameter conduits 23 are formed are prepared, and these prefabricated porous tubes 24 are connected by abutting the respective conduits 23. Was. According to this, if the prefabricated perforated pipes 24 are connected in a line, a number of conduits 23 in each prefabricated perforated pipe 24 are connected, so that the piping work is not required and the cross section of the conduits can be reduced as much as possible. There are advantages such as that land subsidence does not occur later.

[0004]

However, when the prefabricated perforated tube 24 is used, when the adjacent perforated tubes 24 are connected to each other within the cut-out groove, the surfaces to be abutted are rectangular, so that the positions of the surfaces are completely set. Otherwise, the conduits 23 are not connected, and it is extremely difficult to adjust the positions of the bottoms of these cut grooves and the positions of the connected prefabricated porous tubes.

Accordingly, the present invention provides a method for burying a perforated pipe in which the prefabricated perforated pipe can be connected extremely easily and reliably in these open-cutting methods, and solves the above-mentioned problems.

[0006]

According to the invention of claim 1, a groove for burying a pipe line is provided by excavating the ground surface, and a plurality of small diameter holes are formed in the groove in parallel with the axial direction. Insert a large number of solid prefabricated perforated pipes with circular cross-sections that form pipe lines,
These prefabricated perforated pipes are connected to each other by connecting the prefabricated perforated pipes along the groove in the axial direction, and then the groove is backfilled with earth and sand, and a plurality of pipes are buried in the soil. The pipe burying method was adopted.

The invention according to claim 2 provides a groove for burying a pipeline by excavating the ground surface, and in the groove,
Insert a large number of solid prefabricated perforated pipes with a circular cross section made of concrete in which a plurality of small-diameter pipe lines are formed parallel to the axial direction. End faces of the prefabricated perforated pipes, and a screw protruding from the end face of one prefabricated perforated pipe is screwed to an insert nut provided on the end face of the other prefabricated perforated pipe to connect these prefabricated perforated pipes along the groove substantially in the axial direction. After that, the groove was backfilled with earth and sand, and a plurality of pipelines were buried in the soil to form a perforated pipe.

[0008]

In the invention of claim 1, since the prefabricated perforated pipes connected along the groove are lined up in a line in the groove dug in the ground surface, when the groove is backfilled, the earth and sand are mixed with the inner wall of the groove and the prefabricated porous pipe. It is easy to insert it into the outer circumference of the pipe, and it is difficult to create a gap between them. In addition, each conduit of the prefabricated perforated pipes, which are connected in large numbers within the groove, extends long, and these pipes form multiple lines.
Therefore, a power cable or the like can be inserted into each of these conduits.

According to the invention of claim 2, the above-mentioned claim 1
The same operation as that of the above-mentioned invention is performed. Furthermore, the position of each conduit of each prefabricated perforated pipe can be aligned with the position of the conduit of the adjacent prefabricated perforated pipe when the screw on the end surface of each prefabricated perforated pipe is screwed into the insert nut. The work of connecting the prefabricated perforated pipes together is extremely easy. Further, when the prefabricated perforated pipes are butted and connected to each other, if a part of the screw is loosely screwed to the insert nut, adjacent prefabricated perforated pipes can be bent and connected to each other.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. First, a prefabricated perforated pipe 1 used in the present invention will be described with reference to FIGS. 1 to 3. In this prefabricated perforated pipe 1, a plurality of cable storage pipes 2 are arranged in parallel in the axial direction and are spaced apart from each other. Is provided. Annular steps 3 and 4 are formed on the outer periphery of one end of the prefabricated porous tube 1, and a steel plate 5 is fixed to the surface of the end face. At three equally spaced locations on the outer periphery of the steel plate 5, insert nuts 7 supported by anchors 6 are provided.
The outer end opening is exposed.

On the other hand, on the outer circumference of the other end of the prefabricated porous tube 1,
A box 8 having an open upper surface and wall surfaces on the other five sides,
The opening face is directed toward the outer periphery of the prefabricated porous tube 1, and one side surface is exposed at the other end surface of the prefabricated porous tube 1, and is provided at three locations along the outer edge of the prefabricated porous tube 1 at equal intervals. An anchor 9 is fixed to both sides of each box 8 in advance and embedded in the prefabricated porous tube 1.
Further, a bolt 10 is passed through one side of the prefabricated porous tube 1 of each box 8 exposed at the other end surface of the prefabricated porous tube 1 through a spring washer 10a so that the bolt 10 can freely slide and project.

The free positions of the bolts 10 correspond to the insert nuts 7 on the straight line in the axial direction. On the outer periphery of the end of the prefabricated porous tube 1 on the side where these boxes 8 are provided, an annular collar 11 is provided protruding outward from the other end surface of the prefabricated porous tube 1 except for the opening surface of the box 8. Have been. Further, an annular waterproof packing 12 is provided on the inner periphery of the collar 11.

A plurality of prefabricated perforated pipes 1 having the above-described structure are prepared, and a ground surface 13 is cut and a groove 14 is dug as shown in FIGS. After digging the groove 14 to a predetermined depth over a certain length, the large number of prefabricated porous tubes 1 are put into the groove 14 and connected. In this connection, the end of the prefabricated perforated tube 1 having the box 8 is brought into contact with the end of the other prefabricated perforated tube 1 having the insert nut 7, and each bolt 10 in each box 8 is connected to each insert nut 7. Screw it. At this time, the steps 3 and 4 of the other prefabricated porous tube 1 are fitted into the inner periphery of the collar 11. A support 15 for construction is laid under each of these prefabricated porous tubes 1.

When the bolts 10 are fully tightened, as shown in FIG. 6, the end faces of the adjacent prefabricated porous tubes 1 are in close contact with each other and do not rattle. At this time, since the positions of the pipes 2 of the adjacent prefabricated porous tubes 1 coincide with each other, each pipe 2 extends by the length of the connected prefabricated porous tube 1. In this way, a number of prefabricated porous tubes 1 are axially connected along the groove 14. If the opening surface of each box 8 is covered with an appropriate lid after such connection work, the watertightness of each box 8 is ensured, and the waterproof packing 12 is pressed against the periphery of the step portion 3 so that the prefabricated porous The waterproofness of the interconnecting portions of the tubes 1 is ensured.

In order to connect these prefabricated perforated pipes 1 in a curved manner, as shown in FIG. 7, one of the bolts 10 of one of the adjacent prefabricated perforated pipes 1 is loosened and clearance is taken. The other prefabricated porous tube 1 can be bent and connected to the prefabricated porous tube 1, and a curved pipeline can also be formed. Also in this case, the connection portion is covered with the collar 11 and has high waterproofness due to the waterproof packing 12. Furthermore, if a clearance is provided for the tightening of the bolts 10 in this manner, the connection portion is flexible, and the direction of each prefabricated porous tube 1 can be corrected, and vibrations after installation, earthquakes, etc. can be handled, and each prefabricated tube can be used. The connection of the perforated tube 1 is not lost. In this way, a number of prefabricated porous tubes 1 are connected in the groove 14, and after the connection is completed, the groove 14 is filled with earth and sand.

The prefabricated perforated pipe 1 used in the above embodiment has twelve pipes 2, but the number of pipes 2 is not limited to this, and the number of pipes 2 is fifteen as shown in FIG. As shown in the figure, the number of conduits may be an appropriate number, such as 16 lines. In each case, the conduits can be brought close to each other. Although not shown, one prefabricated porous tube 1
The configuration may be such that the cross-sectional diameter of each pipe line 2 is different.

In place of the prefabricated perforated tube 1 of the above embodiment, as shown in FIGS. 10 to 14, the perforated tube 1 and the work support 15 may be integrally provided in advance. FIG.
FIGS. 0 and 11 show a second embodiment of a prefabricated perforated tube according to the present invention.
A support 16a is provided integrally from one end to the other end of the bottom of the prefabricated porous tube 16 having the same structure as that of the prefabricated porous tube 16. FIG.
Reference numeral 2 denotes a third embodiment. In the third embodiment, supporting legs 17a are integrally provided at both ends of the bottom of a prefabricated porous tube 17 having the same structure as the prefabricated porous tube 1.
The side surface of each support leg 17a of this embodiment is the same as that of FIG.

FIGS. 13 and 14 show a fourth embodiment of a prefabricated perforated tube according to the present invention.
8 from one end to the other end thereof, two support legs 18a
Are provided on the front and rear sides with an interval.

[0019]

According to the first aspect of the present invention, when connecting adjacent prefabricated perforated pipes in an open groove, the abutting surfaces are circular in cross section, so that the positions of the respective pipelines are aligned along the outer circumference circle. The position of each prefabricated perforated pipe to be connected can be adjusted very easily, for example, the prefabricated perforated pipe can be rotated, and the connection work of the prefabricated perforated pipe can be performed easily and speedily.

Further, in addition to the effect of the invention of claim 1, the prefabricated perforated pipes to be connected are connected to each other by an insert nut in which a screw of one butting surface is provided at the other butting surface. If it is screwed in, the respective conduits of the prefabricated perforated pipes are aligned with each other, so that reliable and easy connection can be achieved. In addition, since the prefabricated perforated pipe is made of solid concrete, it has excellent heat conduction, easily dissipates the heat of the cable to the surrounding ground, and increases the power transmission efficiency when a power cable is inserted into each pipe.
Also, when connecting each prefabricated perforated pipe, when connecting each prefabricated perforated pipe, loosen some screws to insert nuts, and if a clearance is provided, bend adjacent prefabricated perforated pipes to each other. It is also possible to make curved connections and to correct the direction. Furthermore, it can respond to vibrations and earthquakes after installation, and the connection of each prefabricated porous tube does not break.

[Brief description of drawings]

FIG. 1 is a side sectional view of a first embodiment of the present invention.

FIG. 2 is a front sectional view of the first embodiment of the present invention.

FIG. 3 is a front view of the prefabricated porous tube according to the first embodiment of the present invention.

FIG. 4 is a left side view of the prefabricated porous tube of the first embodiment of the present invention.

FIG. 5 is a right side view of the prefabricated porous tube according to the first embodiment of the present invention.

FIG. 6 is an enlarged cross-sectional view showing a linear connection portion of the prefabricated perforated pipe according to the first embodiment of the present invention.

FIG. 7 is an enlarged sectional view showing a curved connection portion of the prefabricated porous tube according to the first embodiment of the present invention.

FIG. 8 is a side view of the prefabricated porous tube according to the first embodiment of the present invention, in which the number of lines of the conduit is changed.

FIG. 9 is a side view of the prefabricated perforated pipe according to the first embodiment of the present invention, in which the number of pipes is further changed.

FIG. 10 is a side view of a prefabricated porous tube according to a second embodiment of the present invention.

FIG. 11 is a front view of a prefabricated porous tube according to a second embodiment of the present invention.

FIG. 12 is a front view of a prefabricated porous tube according to a third embodiment of the present invention.

FIG. 13 is a side view of a prefabricated porous tube according to a fourth embodiment of the present invention.

FIG. 14 is a front view of a prefabricated perforated pipe according to a fourth embodiment of the present invention.

FIG. 15 is a cross-sectional front view showing a conventional multi-line pipe line.

FIG. 16 is a cross-sectional front view showing a multi-line pipe using a conventional prefabricated porous tube.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Prefabricated perforated pipe 2 Pipe line 5 Steel plate 7 Insert nut 8 Box 10 Bolt 11 Collar 12 Waterproof packing 13 Ground surface 14 Groove 15 Construction support

Claims (2)

[Claims] 1. A prefabricated body having a circular cross section in which a groove for burying a pipeline is provided by cutting the ground surface, and a plurality of pipelines having a small diameter are formed in the groove in parallel with the axial direction. A method for burying perforated pipes by excavation, characterized in that a large number of perforated pipes are inserted, and the respective prefabricated perforated pipes are joined together to connect the prefabricated perforated pipes along the groove in an approximately axial direction. 2. A concrete circular cross section in which a groove for burying a pipeline is provided by excavating the ground surface, and a plurality of pipelines having a small diameter are formed parallel to the axial direction in the groove. Insert a large number of real prefabricated perforated pipes, align the respective conduits of each of these prefabricated perforated pipes and abut the end faces of each prefabricated perforated pipe with screws protruding from the end face of one prefabricated perforated pipe of the other prefabricated perforated pipe. A method for embedding a perforated pipe by excavation, which is characterized in that these prefabricated perforated pipes are screwed to insert nuts provided on the end faces to connect the prefabricated perforated pipes along the groove in an approximately axial direction.