JP4140305B2 - Tube for underground burial and its burial method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention mainly arranges a required number of synthetic resin pipes, for example, 3 rows, 4 rows, etc., in a groove excavated from the ground, for protecting optical fiber cables, power lines, telephone lines and the like by inserting them inside and protecting them. The present invention relates to a tube for underground use and a method for burying it, which are used as a perforated pipe by piping, or by piping a plurality of rows such as two, three, four, etc. in a stacked manner.
[0002]
Thus, in the tubular body referred to in the method of the present invention, the tube wall is formed in an uneven shape in the tube axis direction, the cross-sectional shape of the convex portion is formed in a square shape, and the cross-sectional shape of the concave portion is circular. It is intended for a synthetic resin tube having a formed shape.
[0003]
[Prior art]
Conventionally, a general synthetic resin circular spiral tube in which the tube wall is spirally uneven and the cross-sectional shape of both the convex and concave portions is formed in a circular shape is buried in the ground to protect the electric wire and the water supply tube It is widely known to use as. In addition, a plurality of such circular spiral pipes are piped in parallel, and in many cases, the pipes are arranged in parallel in one row in a horizontal row, but these pipe bodies are connected with a relatively short span in the length direction. Also known is a means for forming perforated pipes that are stacked in a plurality of rows and stages while maintaining a predetermined space in the vertical direction by converging.
[0004]
On the other hand, the synthetic resin tube (hereinafter referred to as the shape of the tube wall having a circular concavo-convex shape, the cross-sectional shape of the convex portion being a square shape, and the cross-sectional shape of the concave portion being a circular shape, which is the subject of the present invention, is described below. This is referred to as a special-shaped concavo-convex tube, which has been filed by the present applicant and has already been publicly known (see JP-A-8-219333).
[0005]
[Problems to be solved by the invention]
Thus, in the case of the circular spiral tube, it is easy to rotate in the circumferential direction when piping, and the positional stability is poor. In particular, when forming a porous pipe by parallel piping in the ground, each pipe Sediment is trapped between the bodies, and the straightness is disturbed and it is easy to meander, and when the pipe is meandering, the wiring resistance becomes remarkably large and the cable insertion work becomes difficult. There is a problem that it is easy to invite. In addition, stacking piping is difficult in a natural state, and as described above, there is also a problem that it is difficult to perform stacking piping unless the connecting fittings for convergence are used to connect with a short span.
[0006]
The present invention pays attention to the problems of such a conventional general circular spiral tube and eliminates the use of this general circular spiral tube for the purpose of solving the problems of the conventional pipe. However, only the special-shaped concavo-convex tube P is used as a target, and the horizontal and horizontal directions are parallel to each other by using the vertical and horizontal flat walls of the rectangular convex wall 2 of the special-shaped concavo-convex tube P. It is possible to easily connect pipes in a parallel posture and a stacked posture, and such a pipe body is made into a parallel parallel pipe in the ground or a multi-row / multi-stage parallel laminated pipe. It is intended to form a pipeline.
[0007]
However, in this special-shaped uneven pipe P, if a plurality of rows or a plurality of rows and a plurality of stages are brought into close contact with each other in the excavation groove and piped as a single block body shape, an adjacent circular wall portion (recessed portion) is provided after the piping. ) After filling a small space formed between 3 and 3 with a filler such as sand or earth and sand, the digging groove was backfilled and covered with soil. However, the work of filling and compacting the filler such as sand and earth and sand in this small space requires time and labor.
[0008]
Therefore, the present inventor changed the idea from such a gap filling method, and while taking full advantage of the advantage of the special shape uneven pipe P, in particular, has the advantage of being able to stably stack pipes. While making use of it as it is, it is possible to use the production equipment as it is by simply making some changes to the production mold for the specially shaped relief tube P, and it can be produced without reducing the production speed. It is an object of the present invention to provide a buried underground pipe body and a method for burying it, which can very easily and quickly carry out underground piping work.
[0009]
[Means for Solving the Problems]
In order to achieve this object, the construction of the underground pipe body according to the present invention is such that a plurality of rows and a plurality of rows and a plurality of rows are stacked in parallel in the groove G excavated from the ground. A tube body to be embedded, in which a tube wall 1 is formed in a concavo-convex shape in the tube axis direction, a cross-sectional shape of the convex portion 2 is a square shape, and a cross-sectional shape of the concave portion 3 is formed in a circular shape. For each length interval, an inflating portion S that protrudes only in the laterally outward direction without protruding in the vertical direction is formed integrally with the tube wall, and the inflating portion S is connected to the piping. In some cases, a predetermined space D is held between the tube rows with other adjacent tube bodies.
[0010]
Also, the first method in the tube embedding method is that the tube wall 1 is formed in an uneven shape in the axial direction, the cross-sectional shape of the convex portion 2 is square, and the cross-sectional shape of the concave portion 3 is circular. In addition, at every appropriate length interval in the tube length direction, a part of the tube wall is formed integrally with the tube wall so that the inflated portion S protrudes only in the laterally outer direction without protruding in the vertical direction. Pipes P that are parallel piped into a groove G excavated from the ground as a plurality of rows in a single row or in a plurality of rows and a plurality of rows stacked, the expanding portion S is arranged in a horizontal orientation during the piping, The inflating portion S is brought into contact with the inflating portion S of the adjacent pipe body P and piped while maintaining a predetermined interval space D between the tube rows, and then the entire excavation groove G including the inside of the interval space D is included. It is a means to backfill and cover the soil.
[0011]
Further, the second method of embedding the tube is that the tube wall 1 is formed in an uneven shape in the axial direction, the cross-sectional shape of the convex portion 2 is square and the cross-sectional shape of the concave portion 3 is circular. An expansion portion S is formed integrally with the tube wall so that a portion of the tube wall protrudes only in the laterally outer direction without protruding in the vertical direction at every appropriate length interval in the tube length direction. The pipe P is a method of parallel piping as a plurality of rows, one row, or a plurality of rows / stacks in a groove G excavated from the ground, wherein the expanding portion S is arranged in a horizontal orientation during the piping, and the expanding portion S is contacted with the convex portion 2 of the adjacent pipe body P and piping is performed while maintaining a predetermined interval space D between the tube rows, and then the entire excavation groove G is filled including the interval space D. The means is to cover the soil back.
[0012]
Further, the third method includes a tubular body P1 in which the tube wall 1 is formed in a concavo-convex shape in the axial direction, the cross-sectional shape of the convex portion 2 is square, and the cross-sectional shape of the concave portion 3 is circular. In the tubular body having such a structure, for each appropriate length interval in the tube length direction, a portion of the tube wall has an inflating portion S that protrudes only in the laterally outer direction without protruding in the vertical direction. The pipe body P is formed integrally with the pipe wall, and the pipe bodies P and P1 are piped in a plurality of rows in a single-stage or multi-stage stack in the groove G excavated from the ground, At the time of piping, the pipe body P provided with the expansion part S is arranged with the expansion part S in a horizontal posture, and the pipe body P1 not provided with the expansion part S adjacent thereto is arranged in parallel. While keeping a predetermined space D between the tube rows by contacting the convex portion 2 of the tube body P1 not provided with the expansion portion. And the tube, then a means to soil cover backfill the entire excavation G including the interval space D.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
In implementing the said pipe body said to this invention, the expansion part S can be implemented as what is formed in the right-and-left both sides of the pipe wall 1 in planar view. Moreover, it can implement also as what is formed only in the one-side direction. In addition, the length of the inflatable portion S in the tube axis direction can be implemented as one having a length corresponding to one of the convex portions 2 in the tube wall 1 as the shortest length. There is a risk that the expansion amount will be large and thin unless measures such as instantaneously lowering the moving speed of the mold at the molding portion of the expansion portion S at the time of molding the tubular body or increasing the extrusion amount of the tube are taken. Therefore, in order to form without the need for such means, it is preferable to form the tube wall 1 with a length corresponding to a plurality of two or three of the convex portions 2 of the tube wall 1. However, it is not necessary that the length is an integral multiple of the convex portion 2 of the tube wall 1.
[0014]
Further, the inflating portion S does not need to be formed at a symmetrical position in the tube axis direction, and may be formed by being displaced asymmetrically in the tube axis direction. In addition, the planar view shape of the inflatable portion S does not have to be a rectangular shape, and can be implemented as a tapered triangle shape, an oval shape or a semicircular arc shape.
[0015]
Since the tubular body P referred to in the present invention is used by being buried in the ground, the forming material thereof is preferably a non-chlorine resin such as a polyolefin resin such as polyethylene or polypropylene, A tube made of a synthetic resin material that is water-resistant and has little deterioration with time is suitable.
[0016]
【Example】
Next, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 to FIG. 4 are diagrams for explaining a tubular body according to a first embodiment of the present invention and a method of burying it in the ground using the tubular body. 1 is a longitudinal sectional view showing a piping state in which tubes are stacked in a plurality of rows and stages, FIG. 2 is a plan view showing the piping state, and FIG. 3 is a perspective view showing a cross section taken along line AA in FIG. FIG. 4 is a longitudinal sectional view showing a state after the underground operation.
[0017]
The tube P targeted by the present invention, including the tube shown in the first embodiment, has a concave-convex wave shape in the tube axis direction as shown in FIG. The cross-sectional shape of the portion 2 is a substantially square shape with rounded corners, and the cross-sectional shape of the concave portion 3 that connects between the convex portion 2 and the convex portion 2 in the tube axis direction is a perfect circle shape. It is a tubular body formed in a shape in which the recesses 3 are alternately continuous.
[0018]
As shown in FIG. 2, the tubular body of the present embodiment is an expanded portion that protrudes laterally outward from the tubular wall 1 at appropriate length intervals in the tubular length direction, as shown in FIG. 2. In this structure, S is formed integrally with the tube wall. As shown in FIGS. 1 and 3, the inflatable portion S is formed at the same height as the convex portion 2 in the tubular body P in the vertical height direction, and protrudes only in the laterally outward direction. It is as. In addition, the expanding portion S of the embodiment has a length corresponding to three of the convex portions 2 in the tube axis direction, and is about a half width of the horizontal width of the convex portion 2 in the left and right laterally outer directions. It is formed in a rectangular shape in plan view that protrudes. Therefore, as shown in FIG. 2, when this inflating portion S is brought into contact with each other and piped, a configuration in which a space D corresponding to one tubular body can be maintained between the adjacent adjacent tubular bodies P. It is what.
[0019]
Next, a first means for embedding the pipe body P having such a structure in the ground to form a porous pipe line will be described. In each embodiment described below, as shown in FIG. 1 and FIG. 3, pipes P are arranged in three rows horizontally and vertically in each row, and a total of nine tubes P... It is described as an example.
[0020]
As shown in FIG. 1, first, a ground G on which a pipeline is to be formed is excavated to a required width and required depth to form a groove G having a required width and depth for piping. If necessary, gravel, sand, etc. 11 are spread on the bottom surface to form the groove bottom almost flat. Thereafter, three pipes P are first piped in parallel on the bottom of the groove. At this time, as shown in FIG. 2, the expanding portions S and S of the adjacent pipe bodies P and P are brought into contact with each other, and the inflating portions S and S of the both pipe bodies P and P are disposed between the adjacent pipes. Piping is carried out while maintaining a space D that substantially corresponds to the protruding length of. Subsequently, on each of these pipes P, two different pipes P are stacked one by one, or one by one and then one by one, for a total of nine in three rows and three stages. 1 are piped as shown in FIG. The order of this piping does not have to be this way. For example, in the state where the tubes P ... are pre-stacked in three rows and three rows, the next row is stacked and stacked in three rows one by one. According to the procedure, piping may be performed in the easiest way.
[0021]
After piping in this way, appropriate earth and sand, gravel, excavated soil, etc. are introduced into the gap space D formed between the tube rows and embedded, or the entire groove G is backfilled with excavated soil. As shown in FIG. 4, the entire pipe is covered with soil.
[0022]
5 and 6 are views showing a second means for forming a porous pipe by being buried in the ground using the pipe P having the above structure. This second means, when piping the pipe body P on the bottom surface of the groove G excavating the ground 10 in the same manner as described above, without directly contacting the expansion portions S, S of the pipe bodies P, P. As shown in FIG. 6, the pipes P, P adjacent to each other are arranged by piping in a state where the positions of the expansion parts S, S are shifted in the pipe axis direction so as to be in contact with the convex part 2 of the other pipe P. In between, it pipes in the state which formed the gap | interval space D substantially equivalent to the horizontal direction protrusion length of the expansion part S. As shown in FIG. The means for laminating the pipes, the embedding of earth and sand in the gap space D, the backfilling operation in the excavation groove G, and the like are in accordance with the first means.
[0023]
7 and 8 are diagrams for explaining the third means of the underground pipe burying means. This third means includes a tubular body P having an inflating portion S projecting in the left and right laterally outward directions of the tubular body, as shown in FIGS. In this method, a pipe line is formed using the pipe body P1 in which the inflatable portion S is not formed, and these pipe bodies P and P1 are horizontally arranged in three rows, each row in a groove G excavated from the ground. This is a method of piping in a plurality of rows as a 3-stage stack vertically. At the time of the piping, the pipe body P provided with the expansion part S is arranged in the approximate center of the excavation groove G with the expansion part S in the horizontal orientation, and the pipe body that does not include the expansion part S on both right and left sides thereof. P1 and P1 are arranged in parallel, and the projecting portions 2 and 2 of the tubular bodies P1 and P1 that do not include these inflating portions are in contact with the inflating portion S so that a predetermined interval is provided between these tube rows. The piping is performed while maintaining the space D.
[0024]
In this case, although there is no particular advantage, the pipe body P1 in which the expansion part S is not formed may be arranged in the center part, and the pipe bodies P and P in which the expansion part S is formed may be arranged on the left and right. As shown in FIG. 9, which will be described later, the pipes P and P in which the inflating part S is formed so as to protrude only in one side direction, the pipe P1 having no inflating part with the inflating part S facing the center. Needless to say, the pipes may be appropriately piped on both sides. After that, the means for backfilling and covering the entire excavation groove G including the space D is as described.
[0025]
9 and 10 respectively show another structure of the pipe P and its piping posture. The pipe P of FIG. 9 shows the pipe P of the second embodiment, and the inflating portion S is shown. A structure is formed so as to project only toward one outer side (upper side in the drawing) of the tubular body, and this inflating portion S is piped toward another tubular body P, and between the tubular bodies P, P. An interval space D is formed. The tubular body P shown in FIG. 10 shows the tubular body P of the third embodiment, and is formed by projecting the expanding portion S toward both the left and right sides of the tubular body. The structure is formed in different places. Moreover, the tubular body P shown here is not the square shape but the trapezoidal shape or the truncated triangle. Further, in FIG. 10, one inflating portion S is shown as a diagram in a case where piping is brought into a positional relationship in contact with the non-inflating surface of the inflating portion S of the other tubular body P, and the inflating portion is interposed between the tubular bodies P and P. A piping configuration in which an interval space D corresponding to the bulging length of S is formed is shown. However, by piping the expansion portion S in a positional relationship in which the expansion portion S is in direct contact with the expansion portion S of the other tubular body P, an interval space D corresponding to the bulging length of the two expansion portions S, S is provided between the tubes. It can also be piped to form.
[0026]
Although typical embodiments of the present invention have been described above, the present invention is not necessarily limited to only the means as described in these embodiments. For example, the planar view shape of the inflatable portion S is not limited to the above. It can be implemented with appropriate changes such as forming an oval, an ellipse, an arc, or other shapes, or changing the bulging length of the expanding portion S as appropriate. The invention has the above-described constituent requirements according to the present invention, achieves the object according to the present invention, and can be appropriately modified and implemented within the scope of the following effects.
[0027]
【The invention's effect】
As is apparent from the above description, the method according to the present invention is the advantage of the specially shaped uneven tube P in the tubular body according to claim 1, in particular, directly stable in the vertical direction. While making the most of the advantages of being able to make stacking pipes as much as possible, it is possible to make stacking pipes directly above the same as in the case of specially shaped concavo-convex pipes P. By simply adding, it has the advantage that it can be produced efficiently without reducing the production speed by using conventional production equipment as it is, and at the same time it has the advantage that underground piping is easy. Is.
[0028]
Also, in the underground piping method, just as in the case of the conventional special-shaped concavo-convex pipe P, the pipes are piled up in a plurality of rows, or in a plurality of rows / steps in a groove excavated from the ground. In this piping, it is possible to automatically form a predetermined space between the rows of pipes by simply placing the expansion portion in a horizontal posture, and the width of the space formed between the rows of tubes. However, by selecting and using an appropriate bulge length of the expansion part, it can be made to have any required width, so that sand, gravel, excavated soil, etc. can be easily put into this space. Since the excavation groove can be backfilled and filled at the same time, the gap space can be filled and filled, so that the embedding work of the tube can be shortened efficiently and significantly.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a piping state of a tubular body according to a first embodiment.
FIG. 2 is a plan view showing a piping state of the tubular body of FIG.
FIG. 3 is a perspective view showing a piping state cut along line AA in FIG. 2;
FIG. 4 is a longitudinal cross-sectional view showing a state in which the tubular body of the first embodiment is buried in the ground.
FIG. 5 is a longitudinal sectional view showing another piping state of the tubular body of the first embodiment.
6 is a plan view showing a piping state of the pipe body of FIG. 5. FIG.
FIG. 7 is a longitudinal sectional view showing still another piping state using the pipe body of the first embodiment.
8 is a plan view showing a piping state of the tubular body of FIG.
FIG. 9 is a plan view showing a piping state of the pipe body of the second embodiment.
FIG. 10 is a plan view showing a piping state of the pipe body of the third embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pipe wall 2 Convex part 3 Concave part D Spacing space G Excavation groove P Pipe body S Expansion part

Claims (9)

This is a pipe that is buried in the ground by parallel piping as a multi-row one-stage or multi-row / multi-stage stack in the groove (G) excavated in the ground, and the pipe wall (1) is formed uneven in the pipe axis direction The convex section (2) has a square cross section and the concave section (3) has a circular cross section. The expansion portion (S) that protrudes only in the laterally outward direction without protruding is formed integrally with the tube wall, and the expansion portion (S) is formed between the tube rows adjacent to other tube bodies at the time of piping. An underground tube for holding a predetermined space (D). The underground pipe according to claim 1, wherein the inflatable portion (S) is formed to protrude toward the left and right sides of the tube wall (1) in plan view. The underground pipe according to claim 1, wherein the inflatable portion (S) is formed so as to project toward either the left or right side of the tube wall (1) in plan view. The length in the tube axis direction of the inflatable portion (S) is formed to a length corresponding to a plurality of convex portions (2) in the tube wall (1). Tube for underground burial. The underground pipe according to any one of claims 1 to 4, wherein the inflated portion (S) has a rectangular shape in plan view. The underground pipe according to any one of claims 1 to 4, wherein the inflated portion (S) has a tapered triangular shape in plan view. The pipe wall (1) is formed in an uneven shape in the axial direction, the cross-sectional shape of the convex part (2) is square and the cross-sectional shape of the concave part (3) is formed in a circular shape, and an appropriate length in the pipe length direction A tube body (P) in which an inflating portion (S) that protrudes only in the laterally outward direction without protruding in the vertical direction is formed integrally with the tube wall at some intervals. A method of parallel piping as a plurality of rows in a single row or a plurality of rows and a plurality of stacks in a groove (G) excavated in the ground, wherein the expansion portion (S) is arranged in a horizontal orientation during the piping, and the expansion portion (S) is in contact with the expanding portion (S) of the adjacent pipe body (P) and piped while maintaining a predetermined interval space (D) between the tube rows, and then the inside of the interval space (D) A method for embedding underground pipes that backfill and cover the entire excavation groove (G). The tube wall (1) is formed in an irregular shape in the axial direction, the cross-sectional shape of the convex portion (2) is square, and the cross-sectional shape of the concave portion (3) is formed in a circular shape, and an appropriate length in the tube length direction A tube body (P) in which an inflating portion (S) that protrudes only in the laterally outward direction without protruding in the vertical direction is formed integrally with the tube wall at some intervals. A method of parallel piping as a plurality of rows in a single row or a plurality of rows and a plurality of stacks in a groove (G) excavated in the ground, wherein the expansion portion (S) is arranged in a horizontal orientation during the piping, and the expansion portion (S) is placed in contact with the convex portion (2) of the adjacent pipe body (P) and piped while maintaining a predetermined interval space (D) between the tube rows, and then in the interval space (D). A method for burying underground underground pipes that backfill and cover the entire excavation groove (G). A tube body (P1) in which the tube wall (1) is formed in a concavo-convex shape in the axial direction, the cross-sectional shape of the convex portion (2) is square, and the cross-sectional shape of the concave portion (3) is circular, and this A tubular body having a structure as described above, and for each appropriate length interval in the tube length direction, a portion of the tube wall protrudes only in the laterally outward direction without protruding in the vertical direction (S ), And the pipe body (P) formed integrally with the pipe wall, and these pipe bodies (P) and (P1) are stacked in a single-stage or multi-stage shape in the groove (G) excavated from the ground. In this piping method, a pipe body (P) provided with the inflating part (S) is arranged with the inflating part (S) in a horizontal orientation, and the inflating part (S Tube (P1) not provided with a) is arranged in parallel, and the expanding portion (S) is brought into contact with the convex portion (2) of the tube (P1) not including the expanding portion between the tube rows. Piping while holding a predetermined space (D), and then the space (D) A method for burying underground underground pipes that backfill and cover the entire excavation groove (G) including the inside.

Images