JP2003056757A - Underground embedded pipe unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an underground embedded pipe unit for surely preventing the deflection of underground embedded pipes while eliminating the need for work for filling soil into gaps between the underground embedded pipes without causing the removal during transportation or construction while suppressing an increase in weight. SOLUTION: A single or plurality of space holding members 3 are arranged between the underground embedded pipes 1, 1 for holding the plurality of cable- arrangement underground embedded pipes 1 at predetermined spaces in the state of being almost parallel. Covering members 2 are provided for covering the plurality of underground embedded pipes 1, 1 held at the predetermined spaces by the space holding members 3 to make the plurality of underground embedded pipes 1, 1 into one unit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground buried pipe unit capable of efficiently arranging a plurality of underground buried pipes along an arrangement path.

[0002]

2. Description of the Related Art The above-mentioned underground buried pipe unit is constructed by stacking an underground buried pipe unit in which a plurality of underground buried pipes are supported by a supporting member by, for example, expansion, on an existing underground buried pipe unit. It is configured so that a desired number of underground pipes can be installed. If a plurality of underground pipes are bundled by the support member and are arranged in the arrangement route, the underground pipes can be conveyed one by one or arranged in the arrangement route. Not only is it advantageous in terms of transportation, but it is also possible to shorten the installation period of underground pipes as compared with other products. However, in the above-mentioned configuration, backfilling soil is insufficiently filled between the support members constituting the underground buried pipe unit, a void is apt to occur, and the pipe body has its own weight and soil load and live load (vehicle load etc.) after being buried. ), There is a problem in that a bending phenomenon in which the tube shaft center direction intermediate portion drastically hangs down, and as a solution to this, there is one disclosed in Japanese Patent No. 3023664, for example. This is to provide a plurality of fixing pipes for fixing and holding a plurality of burying pipes in parallel with each other at a predetermined interval, at a predetermined interval of the burying pipes.
The space between the fixing pipes in the vertical direction between the embedding pipes is closed by a filling member made of expanded polyethylene.

[0003]

According to the above construction, it is troublesome and troublesome to carry out the work of concentrating and holding a plurality of embedding pipes in parallel at a predetermined interval using a plurality of spacers and a binding band. Not only that, but because the bundled embedding pipes are tightened tightly with a binding band so that they do not come apart, the filling member must be installed between the embedding pipes located above and below before tightening. The sex was deteriorated. Further, the filling member can hold the gaps between the pipes at a predetermined distance to prevent bending, but the filling member sandwiching the bending prevention for the buried pipe located at the lowermost position between the upper and lower pipes is used. There was an inconvenience that could not be done. Further, since the filling member is configured to have a length that fills the voids over the entire space between the spacers, even if it is expanded polystyrene, the weight of the entire unit is dramatically increased and the handleability is deteriorated. Not only that, but there is a disadvantage that the material cost increases. Further, since the filling member is simply sandwiched between the upper and lower burying pipes, if the fastening by the binding band is loosened, the filling member may come off during transportation or construction, and again. The detached filling member had to be sandwiched between the upper and lower buried pipes, which were heavy, and it was difficult to handle. Further, not only the work of filling the gap between the buried pipes that are adjacent to each other in the left-right direction constituting the underground buried pipe unit with soil or the like but also if the soil filling work is not ensured, There was an inconvenience that troubles such as the ground sinking occurred.

In view of the above-mentioned situation, the present invention is to solve the problem that the increase in the weight is suppressed, it does not come off during transportation or construction, and the soil in the gap between the underground pipes is not removed. An object of the present invention is to provide an underground buried pipe unit that can reliably prevent the bending of the underground buried pipe while eliminating the need for filling work.

[0005]

In order to solve the above-mentioned problems, the underground buried pipe unit of the present invention has a plurality of underground buried pipes for arranging cables at predetermined intervals in a state where they are substantially parallel to each other. A single or a plurality of interval holding members for holding are arranged between the underground buried pipes, and a covering member for covering the plurality of underground buried pipes held at predetermined intervals by the interval holding member is provided. It is characterized by integrating the plurality of underground pipes. By covering the underground buried pipe with the covering member as described above, not only the covering member serves as a protection member for the underground buried pipe, but also a plurality of underground buried pipes can be integrated. When a plurality of spacing members are arranged in the longitudinal direction of the underground pipe, an internal space can be formed between the spacing members, and the weight can be reduced according to the volume of the internal space. Can be achieved. The spacing member is
The smaller the number, the more weight can be reduced, but by arranging multiple underground buried pipes at predetermined intervals by arranging them in the middle part other than both ends of the underground buried pipe depending on the length of the underground buried pipe. It can be surely integrated in the state where it is put. By integrating as described above, it is possible to prevent the underground buried pipe from bending at the intermediate portion. Moreover, by covering the underground buried pipe with the covering member, there is no gap that occurs between the underground buried pipes as in the conventional case, and it is not necessary to backfill soil with the gap.

The covering member is wound around the outer surfaces of the plurality of underground buried pipes and the outer surface of the spacing member so as to be overlapped at both ends in the winding width direction to integrate the plurality of underground buried pipes. By constructing the strip-shaped body for this purpose, it is possible to integrate a plurality of underground buried pipes simply by winding it around the underground buried pipe.

By constructing the belt-shaped body with a resin film, not only can the weight be reduced, but also the water-tightness can be exerted against water or the like existing in the ground.

When a plurality of the underground buried pipes are arranged in the left-right direction and the space holding members are arranged between adjacent underground buried pipes to keep the space between the pipes, the space holding members are vertically moved. When the ends are set at substantially the same height as the upper and lower ends of the plurality of underground buried pipes adjacent to each other in the left and right direction, a step is generated between the spacing member and the underground buried pipe. Or there is a small step generated between the spacing member and the underground buried pipe, and by simply covering the upper surface of the spacing member and the outer surface of the underground buried pipe with the covering member, No gap is generated between the upper surface and the outer surface of the underground buried pipe.

Positions in which the spacing members are arranged at least at both ends of the underground buried pipe, and at least one of the spacing members is offset from one end to the other end of the underground buried pipe by a predetermined distance. And one end of the strip is located substantially at the same position as one end of the underground burying pipe of the spacing member, and is adjacent to one end of the underground burying pipe in the arrangement direction of the underground burying pipe unit. By mounting the joint for inserting and connecting the ends of the corresponding underground pipes to be connected, the underground pipe units can be connected to each other only by inserting the underground pipe into the joint.

A group of underground buried pipes in which the plurality of underground buried pipes are arranged in a vertical direction with a predetermined interval held by a spacing member, and a plurality of underground buried pipes are arranged in the vertical direction. Are arranged in a plurality of rows on the left and right, and an auxiliary gap holding member for holding the underground buried pipe groups adjacent to each other in the left-right direction at a predetermined interval is arranged between the underground buried pipe groups, and all of them are grounded. By covering the group of middle-embedded pipes with the covering member, it is possible to dispose many underground-embedded pipes at once, while eliminating the work of backfilling the soil in the gap between the pipes. Become. Further, when the space is formed inside the covering member as described above, the weight can be reduced.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 shows an underground buried pipe unit U for connecting between connection portions such as manholes and handholes (not shown) arranged at predetermined intervals along the arrangement route. It shows a state in which the pieces are stacked vertically.
In the underground buried pipe unit U, a plurality of underground buried pipes 1 (two and three in the figure, but four or more may be used) for accommodating cables such as electric wires and optical fibers are covered with the covering member 2. It is configured to be integrated in the horizontal direction via. The underground buried pipe unit U is manufactured in advance in a factory or the like and then transported to the site for use.

The underground buried pipe unit U will be described in detail. As shown in FIGS. 1 (a), 1 (b) and 1 (c), two underground buried pipes 1 are arranged in a substantially parallel state. , The left and right side surfaces 3 in the shape of an arc that match the outer surface shape of the tube 1 between them.
A plurality of synthetic resin spacing members 3 having A and 3B (only two are shown in the figure) are arranged at predetermined intervals in the longitudinal direction of the underground buried pipe 1, and the two underground Of the outer surfaces of the buried pipes 1 and 1, the outer surface exposed to the outside and the flat upper end surface 3C and lower end surface 3D of the spacing member 3 located at a plurality of longitudinal positions of the pipe are covered with the covering member 2. Thus, the two underground pipes 1 and 1 are integrated to form an underground pipe unit U. The number of underground pipes 1 is two in the figure, but in addition to the three shown in FIG.
Although the number may be four or more, the number which is advantageous in terms of handling due to the increase in weight due to the increase in the number is up to three.
Further, the shape of the space holding member 3 is not limited to that shown in the drawing, but it is necessary that the space holding member 3 has a shape that does not cause a space between pipes and a space between the space and the covering member 2. There is. Further, the interval holding member 3 is most preferably made of synthetic resin for weight reduction, but may be made of wood or any other lightweight material.

The underground buried pipe 1 is composed of a synthetic resin hose in which convex portions 1A and concave portions 1B are alternately formed in a spiral shape on the outer surface and an inner surface 1C is a flat surface. By forming the inner surface of the underground buried pipe 1 to be flat, there is an advantage that a wire passing operation for inserting an electric wire into the underground buried pipe 1 can be performed smoothly and quickly without being caught. It is also possible to carry out without forming the inner surface 1C of the intermediate buried pipe 1 flat. Further, the material of the underground buried pipe 1 is advantageous in that the weight can be reduced by constructing it from a synthetic resin, but a material other than the synthetic resin may be used.

The spacing member 3 is, as described above,
Left and right arcuate side surfaces 3A, 3B along the outer surface of the underground buried pipes 1, 1 and flat upper end surfaces 3C at the upper and lower ends which are flush with the upper and lower ends of the underground buried pipe 1, and Bottom surface 3
It is composed of a synthetic resin spacer having D and. As shown in FIG. 3, by forming a convex portion 3T into the concave portion 1B of the underground buried pipe 1 on each of the side surfaces 3A and 3B, there is no gap between the spacer 3 and the underground buried pipe 1. It can be in a close contact state, and it is possible to prevent moisture from entering the inside from between the spacer 3 and the underground buried pipe 1. The upper and lower end surfaces 3C and 3D are set at the same height as the upper and lower ends of the underground buried pipe 1, but the covering member 2
The height may be set slightly different as long as sand or soil does not enter the inside of the unit from between the spacer 3 and the spacer 3. Further, the spacer 3 is not limited to the shape and size shown in the figure, and can be freely changed. As the number of the spacers 3 decreases, the volume of the space 4 formed inside the covering member 2 increases and the weight of the underground buried pipe unit U can be further reduced, but the space is generated. In order not to do so, one or a plurality of spacers 3 may be arranged between the underground buried pipes 1 and 1 for implementation.

As shown in FIG. 4, the end portions of the underground buried pipe units U, U which are adjacent to each other in the arrangement path direction are provided with tapered surfaces 5A (which may be straight surfaces) which are outwardly expanded toward both ends. The single joint 5 is constructed so that it can be connected by simply inserting it from both sides. A packing P is externally fitted to the connection-side end of the underground buried pipe 1, and the ends of the underground buried pipe units U, U are inserted into the joint 5 so that they are connected in a sealed state. It has become. In the case of the single joint 5, there is an advantage that the connection work can be speeded up, but as shown in FIG. 5, the underground buried pipe units U, U which are adjacent to each other in the arrangement route direction are connected to each other. It is also possible to provide it by providing two joints 5 and 5 respectively connecting the constituent buried pipes 1 and 1 to each other. In this case, the distance maintaining member 3 and the covering member 2 are located at a predetermined distance from one end of the underground buried pipe 1 to the other end (a position where the space holding member 3 and the covering member 2 are completely in the joint 5 and coincide with the insertion side end of the joint 5). By arranging in the above, the buried pipe 1 can be externally fitted to the joints 5 and 5, and it is possible to prevent soil and sand from entering between the joint 5 and the spacing member 3. 5A is a tapered surface that expands outwardly on both end sides as described above, and has the advantage that the underground buried pipe 1 can be easily inserted, but it may be a straight surface.

In addition, the spacer 3 is formed as shown in FIG.
It may be configured as shown in (b). This extends a pair of upper and lower arc-shaped locking pieces 3E, 3F capable of locking the underground pipe 1 from the upper and lower ends of the left and right sides, respectively.
By locking E and 3F to the underground buried pipes 1 and 1, the underground buried pipes 1 and 1 do not move unexpectedly when the strip-shaped body 2 that is the covering member 2 is wound as described later. Although there is an advantage that the winding work can be performed quickly, the locking pieces 3E and 3F may be omitted.

The covering member 2 is spirally wound around the outer surfaces of the two underground buried pipes 1, 1 in such a manner that they overlap at both ends in the winding width direction, and the underground buried pipes 1, 1 are integrated. It is composed of a resin film as a band-shaped body for converting into a plurality of (2) underground buried pipes 1 and 1 can be integrated by simply winding them around the buried underground pipes 1 and 1, and The space 4 can be formed in the space, and the weight can be reduced for the outer shape of the underground buried pipe unit U. In addition, by constructing the covering member 2 with the resin film, not only the weight can be reduced, but also water-tightness can be exerted against water or the like existing in the ground. It may be a non-woven fabric or a metal plate. In the resin film, overlapping portions are joined at both ends in the winding direction by using heat welding or an adhesive. As described above, it is easier to manufacture the underground buried pipe unit U by winding the belt-shaped body such as the resin film, as compared with the case where the underground buried pipe 1 is covered with the cylindrical covering member 2. However, there is an advantage that the underground pipes 1 and 1 can be firmly integrated.
The underground buried pipe unit U may be configured by covering the underground buried pipe 1 with a cylindrical one. For the resin film, a synthetic resin having a hardness that is not easily deformed by the weight of backfilled soil is used.

If desired, the underground buried pipe units U may be vertically stacked as shown in FIG. In this case, the underground buried pipe unit U in the vertical direction,
A holding member (not shown) for holding the Us at predetermined intervals may be provided in the underground buried pipe unit U or may be arranged between the underground buried pipe units U, U.

The underground buried pipe unit U is shown in FIG.
It can also be configured as shown in (a) and (b). With this configuration, there is an advantage that a large number of underground pipes 1 can be arranged at once. That is, three underground buried pipes 1 are arranged in the vertical direction via the two spacing members 3 to form a underground buried pipe group 7, and two rows of the underground buried pipe group 7 are arranged in the left-right direction. The subsurface burying pipe unit U is configured by covering the whole subsurface burying pipe group 7 thus arranged with the covering member 2. In this case, since a large number of underground buried pipes 1 are arranged, the interval holding member 3 for holding the vertically buried underground pipes 1, 1 at a predetermined interval is different from the above-mentioned one. By constructing the length of the underground buried pipe 1 over substantially the entire length in the longitudinal direction, it is advantageous in handling. In addition, the auxiliary spacing member 6 is configured to have a length to be arranged at two positions at the front and rear ends of the underground buried pipe group 7 or at an intermediate portion in the front-rear direction, thereby forming the space 4 therein, thereby reducing the weight. However, the space 4 may be omitted.

[0020]

According to the first aspect of the present invention, not only does the conventional strong fixing work by the spacer and the binding band become unnecessary, but the filling member must be arranged before tightening with the binding band. By not covering the underground buried pipe with a covering member without causing a decrease in workability,
While suppressing the increase in weight, it does not come off during transportation or construction, and it does not require earth filling work in the gap between underground buried pipes, while reliably preventing bending of underground buried pipes. It is possible to provide an underground buried pipe unit that can be used.

According to the second aspect of the present invention, the covering member is wound around the outer surface of the plurality of underground buried pipes and the outer surface of the spacing member so as to be overlapped at both ends in the winding width direction thereof. By constructing a strip-shaped body for integrating the buried pipe, it is possible to integrate a plurality of underground buried pipes by simply winding it around the underground buried pipe, and elastically deform the covering member formed in a tubular shape. Not only is it advantageous in terms of manufacturing compared to the case where it is covered, but it is also possible to firmly integrate the underground buried pipe and the spacing member without a gap, and improve the shape retention performance of the entire underground buried pipe unit. You can

According to the third aspect of the present invention, the band-shaped body is made of a resin film, so that not only can the weight be reduced, but also the water-tightness against the water existing in the ground can be exhibited. Therefore, it can be advantageous for long-term use.

According to the invention of claim 4, a plurality of underground buried pipes are arranged in the left-right direction, and a gap holding member is arranged between adjacent underground buried pipes to keep the gap between the pipes. By setting the upper and lower ends of the space holding member at substantially the same height as the upper and lower ends of a plurality of underground buried pipes that are adjacent to each other in the left-right direction when viewed in the left-right direction, the space between the space holding member and the underground buried pipe is set. No step is generated, or the step generated between the spacing member and the underground buried pipe is small, and the covering member can be formed by simply covering the upper surface of the spacing member and the outer surface of the underground buried pipe with the covering member. There is no gap between the upper surface of the space holding member and the outer surface of the underground buried pipe, and it is possible to reliably prevent the entry of soil or sand.

According to the invention of claim 5, the spacing members are arranged at least at both ends of the underground buried pipe, and at least one of the spacing members is held from one end to the other end of the underground buried pipe. The end of the strip-shaped body at substantially the same position as the end of the space-embedding member on the one end side of the underground burying pipe, and the position of the underground burying pipe unit at one end of the underground burying pipe. By inserting a joint for inserting and connecting the ends of the underground pipes adjacent to each other in the installation direction, the underground pipe units can be connected to each other only by inserting the underground pipes into the joint. The construction work of the underground buried pipe unit can be performed easily and quickly.

According to the sixth aspect of the present invention, a plurality of underground buried pipes are arranged in the vertical direction with a predetermined interval held by a spacing member, and the plurality of underground buried pipes are arranged in the vertical direction. A plurality of underground buried pipe groups are arranged on the left and right, and an auxiliary space holding member for holding the underground buried pipe groups adjacent to each other in the left-right direction at a predetermined interval is provided between the underground buried pipe groups. By arranging these underground pipes and covering them with a covering member, it is possible to dispense with the work of backfilling the soil in the gap between the pipes, but to arrange a large number of underground pipes at once. It becomes possible, and becomes advantageous when a large number of underground pipes 1 are installed.

[Brief description of drawings]

FIG. 1 shows an underground burying pipe unit, (a) is an exploded perspective view of an underground burying pipe and a spacing member before winding a covering member, and (b) is an underground burying pipe before winding a covering member. The perspective view which shows the state which has arrange | positioned the space | interval holding member between them, (c).
FIG. 4 is a perspective view of a unit completed by winding a covering member.

FIG. 2 is a perspective view showing a state in which a plurality of underground pipe units are vertically stacked.

FIG. 3 is a perspective view of another spacing member.

FIG. 4 is a cross-sectional plan view showing a state immediately before connecting underground buried pipe units to each other with a joint.

FIG. 5 is a cross-sectional plan view showing a state immediately before the underground buried pipe units are connected to each other by another joint.

6A and 6B show another spacing member, FIG. 6A is a perspective view showing a state in which it is mounted on an underground buried pipe, and FIG. 6B is a perspective view thereof.

FIG. 7 shows another underground pipe unit, (a) is an exploded perspective view, and (b) is a perspective view in a assembled state.

[Explanation of symbols]

1 Underground pipe 1A Convex part 1B recess 1C inner surface 2 Covering member 3 Spacing member 3A, 3B left and right side surfaces 3C upper end surface 3D lower end surface 3T convex portion 3E, 3F Locking piece 4 Space 5 Joint 5A Tapered surface 6 Auxiliary spacing member 7 Underground pipe group P Packing U Underground pipe unit

Claims (6)

[Claims] 1. A single or a plurality of spacing members for holding a plurality of underground pipes for arranging cables at a predetermined interval in a state where they are substantially parallel to each other are arranged between the underground pipes. An underground burying pipe unit in which a covering member for covering the plurality of underground burying pipes held at a predetermined interval by the spacing holding member is provided to integrate the plurality of underground burying pipes. 2. The plurality of underground embedding pipes are integrated by winding the covering member around the outer surfaces of the plurality of underground embedding pipes and the outer surface of the spacing member so as to overlap at both ends in the winding width direction thereof. The underground buried pipe unit according to claim 1, wherein the underground buried pipe unit comprises a strip-shaped body for converting into a solid. 3. The underground buried pipe unit according to claim 2, wherein the band-shaped body is made of a resin film. 4. A state in which the plurality of underground buried pipes are arranged in the left-right direction, and the gap holding member is arranged between adjacent underground buried pipes to maintain the gap between the underground buried pipes,
2. The underground buried pipe unit according to claim 1, wherein the upper and lower ends of the spacing member are set at substantially the same height as the upper and lower ends of the plurality of underground buried pipes which are adjacent to each other in the left and right direction when viewed in the left-right direction. 5. The spacing member is arranged at least at both ends of the underground buried pipe, and at least one of the spacing members is displaced from one end to the other end of the underground buried pipe by a predetermined distance. The one end of the strip-shaped body at substantially the same position as the one end side end of the underground burying pipe of the spacing member, and the installation direction of the underground burying pipe unit at one end of the underground burying pipe. The underground buried pipe unit according to claim 1, wherein a joint for inserting and connecting the ends of the underground buried pipes adjacent to each other is attached. 6. An underground burial structure in which a plurality of the underground burying pipes are arranged in a vertical direction with a predetermined space therebetween via a spacing member, and a plurality of underground burying pipes are arranged in the vertical direction. A plurality of rows of pipe groups are arranged on the left and right, and an auxiliary gap holding member for holding the underground buried pipe groups adjacent to each other in the left-right direction at a predetermined interval is arranged between the underground buried pipe groups,
The underground buried pipe unit according to claim 1, wherein all of the underground buried pipe groups are covered with the covering member.