JP2021095989A - Embedded pipe protective material and embedded pipe protection method - Google Patents

Abstract

To provide an embedded pipe protective material which is good in workability and high in transportation property.SOLUTION: An embedded pipe protective material 100 is configured to protect a pipe material 10 embedded in the ground. Firstly, the embedded pipe protective material comprises a pair of side face protective plates 110 which cover at least 1/4 of a peripheral length of an outer periphery of the pipe material 10, and the side face protective plates 110 have: a circular arc part 111 such that an inner surface side facing the pipe material 10 is formed in a circular arc shape; and an upper linear part 112 and a lower linear part 113 which correspond to a linear part extended from an end part of the circular arc part 111 respectively and having two parallel faces, at least one of the upper linear part 112 and lower linear part 113 having a bing part 114, wherein the pair of the side face protective plates 110 face each other across the pipe material 10 with a protective sheet 20 wound around a circumference of the pipe material 10, and are connected with a binding cord 120 that the binding part 114 comprises, and an upper protective plate 130 is arranged a predetermined gap above the pipe material 10 across earth and sand 60.SELECTED DRAWING: Figure 1

Description

The present invention relates to a protective material for preventing accidentally damaging a PE pipe or the like buried in the ground when other works or the like are performed.

Conventionally, metal castings such as cast iron pipes have been mainly used for piping for carrying fluids such as gas, but in recent years, resin pipes such as PE pipes have been used instead of metal pipes. ing. This is because it has sufficient strength to follow the ground displacement such as earthquakes and uneven subsidence, and it is excellent in workability at the site. However, it is assumed that heavy machinery may accidentally damage the buried pipe when the work is done near the pipe buried in the ground, and if the buried pipe is a resin pipe, it is easier than a metal pipe. It may be damaged and lead to gas leakage. Therefore, a method for protecting this has been studied.

Patent Document 1 discloses a technique relating to a protective material for underground pipes. A protective material main body made of a thermoplastic plastic molded product having a cross section of a superior arc shape and a predetermined length, and a chemical fiber knitting that is joined to the protective material main body to cover the outer peripheral surface of the pipe material buried in the ground. It is covered with a cloth cover. At this time, it is desirable that the length of the protective material body in the circumferential direction is ⅔ or more of the length of the outer circumference of the pipe material, and the inner diameter thereof is substantially equal to the outer diameter of the pipe material. That is, when the protective material main body is attached to the pipe material, it is desirable that the protective material main body adheres to the outer circumference of the pipe material without any gap.

Patent Document 2 discloses a technique relating to a pipeline protection structure. A plurality of protective sheet materials having the property of reducing impact force and allowing the excavation member to slide are laminated and wound around the outer surface of the pipe material buried in the ground, and fixed to the pipe material by the band member. At this time, the protective sheet material is composed of a tape woven with fibers made of synthetic resin such as polyethylene or polypropylene, or a woven cloth material, and is used which is folded into multiple layers or laminated with a single material. ..

Patent Document 3 discloses a technique relating to a pipeline protection structure. A protective sheet that cushions the impact force of excavating members such as excavating machines is wrapped around the outer surface of the pipe material buried in the ground and attached, and a sign sheet is laid on top of the protective sheet. The protective sheet is a durable cloth material woven from synthetic resin fibers such as polyethylene and polypropylene, and the labeling sheet is a plate material made of a durable material, and the surface is coated with a highly smooth material such as fluororesin. The one with a conspicuous color is good.

Japanese Patent No. 2000-146081 Japanese Patent No. 2000-249257 Japanese Patent No. 2001-355758

However, when the technique described in Patent Document 1 is used, it is considered that there is a problem in workability and transportation. In Patent Document 1, a thermoplastic molded product is used as the protective material main body, but in order to protect the buried pipe material, a large number of protective material main bodies should be transported in order to protect a predetermined section. I have to. However, since it is a member having a superior arc shape in cross section having a diameter larger than that of the pipe material to be protected for transportation, it is considered that a large volume is required. Further, when the protective material main bodies are stacked and loaded, there is a concern that the protective material body may be deformed, which may impair the workability at the site.

On the other hand, when the protective sheet as shown in Patent Document 2 and Patent Document 3 is used, it can be folded and carried, but since the tube material is protected only by the protective sheet, it is strong due to heavy machinery. There is a concern that it cannot be protected when force is applied.

Therefore, an object of the present invention is to provide a buried pipe protective material having good workability and high transportability in order to solve such a problem.

In order to achieve the above object, the buried pipe protective material according to one aspect of the present invention has the following features.

(1) In a buried pipe protective material that protects a pipe material buried in the ground, a pair of side surface protective plates that cover a part along the outer circumference of the pipe material are provided, and the side surface protective plate faces the pipe material. An arc portion whose inner surface side is formed in an arc shape and a straight portion having two parallel surfaces extending from the end portion of the arc portion are provided, and at least one of the straight portions has a binding portion. With the protective sheet wrapped around the pipe material, the side surface protective plates face each other with the pipe material in between, and the pair of side surface protective plates are connected by a connecting string provided in the binding portion, and the side surface protective plates are predetermined from the pipe material. It is characterized by having a plate-shaped upper protective plate arranged through earth and sand above the gap between the two.

According to the aspect described in (1) above, by covering the upper surface of the pipe material with the upper protective plate and covering the side surface along the outer circumference of the pipe material with the side protective plate, damage to the buried pipe due to other construction can be prevented. .. The upper protective plate prevents the pipe material from being damaged when a machine tool or the like accidentally excavates the ground from above the pipe material. In addition, the side protective plate prevents the machine tool or the like from accidentally scratching the surface of the pipe material from the side surface of the pipe material and damaging the pipe material.

At this time, the side protective plate has a structure in which the binding portion provided on the upper portion is connected by a binding string, so that the side protective plate can be transported in an overlapping manner. Further, since the upper protective plate is a plate-shaped member, it is easy to stack and carry it. Therefore, it is possible to provide a buried pipe protective material having excellent portability and workability.

(2) In the buried pipe protective material according to (1), when the side protective plates are stacked in the same direction, the adjacent straight portions are overlapped, and a gap is formed between the adjacent arc portions. That is preferable.

According to the aspect described in (2) above, a gap is formed between adjacent arc portions when the side protective plates are stacked, so that the arc portions are deformed when the side protective plates are stacked and conveyed. It is possible to prevent such things.

(3) In the buried pipe protective material according to (1) or (2), the arc portion of the side surface protective plate is formed to have a length that covers at least 1/4 of the outer peripheral length of the pipe material. That is preferable.

According to the aspect described in (3) above, the arc portion of the side protective plate is arranged along the outer circumference of the pipe material, and the side surface portion of the pipe material is covered with the side protective plate, so that the machine tool or the like is erroneously contacted from the side surface. In some cases, damage to the pipe material can be prevented. Since the arc portion of the side protective material has a shape along the outer circumference of the pipe material, it is possible to minimize the width of excavation when burying the pipe material. At this time, by setting the length of the arc portion to a length that covers at least about 1/4 of the peripheral length of the outer circumference of the pipe material, it is possible to sufficiently prevent contact with the machine tool or the like from the side surface. it can.

Further, in order to achieve the above object, the buried pipe protection method according to another aspect of the present invention has the following features.

(4) In the buried pipe protection method for protecting a pipe material buried in the ground, a protective sheet is wrapped around the pipe material, and one side protection plate that partially covers the outer circumference of the pipe material is attached to the side protection plate. The pipe material is connected to the other side surface protective plate by a connecting string that penetrates and connects the binding portion provided on the upper part to form a pair, and the pipe material is sandwiched and fixed by the paired side surface protection plates from the upper part of the pipe material. The pipe material with the side protective plate fixed to the groove dug in the ground is lowered, a certain amount of earth and sand is poured on the pipe material, and a plate-shaped upper protective plate is placed above the pipe material through the earth and sand. Is arranged, and the pipe material is further filled with earth and sand.

According to the aspect described in (3) above, by covering the upper surface of the pipe material with the upper protective plate and covering the side surface of the pipe material with the side protective plate, damage to the buried pipe due to other works can be prevented.

It is a perspective view of the pipe material protected by the buried pipe protection material of this embodiment. It is a perspective view of the present embodiment in a state where a pipe material is removed. It is a side view of the side protection plate of this embodiment. It is a front view of the side protection plate of this embodiment. It is a top view of the side protection plate of this embodiment. It is a side view of the present embodiment in a state where the side protective plates are overlapped. It is a schematic diagram which shows the 1st procedure of this embodiment. It is a schematic diagram which shows the 2nd procedure of this embodiment. It is a schematic diagram which shows the 3rd procedure of this embodiment. It is a schematic diagram which shows the 4th procedure of this embodiment.

First, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a perspective view of a pipe material protected by a buried pipe protection material according to the present embodiment. FIG. 2 shows a perspective view in a state where the pipe material is removed. FIG. 2 is a drawing excluding the pipe material 10 of FIG. The pipe material 10 is a PE pipe (polyethylene pipe for gas) that is piped underground for the purpose of allowing a fluid such as gas to flow inside, and a protective sheet 20 is wrapped around the PE pipe (polyethylene pipe for gas). The size of the pipe material 10 is assumed to be 150A or 200A, which is often used.

The protective sheet 20 is made by laminating a non-woven fabric using polypropylene reinforced fiber and recycled PET material as its material. The material of the protective sheet 20 should be changed to one that can achieve the purpose because the purpose is to absorb the impact when the machine tool accidentally comes into contact with the pipe material 10 buried in the ground due to other construction work. Does not interfere. A side protective plate 110 is arranged on the outside of the protective sheet 20.

Further, the upper protective plate 130 is arranged on the upper part of the pipe material 10 at a predetermined interval. The upper protective plate 130 is a plate material having a thickness of about 15 mm using a recycled PE material, and has a predetermined length. The length is preferably about 1 m. It is desirable to display a warning message or a mark in a conspicuous color on the upper surface of the upper protective plate 130. Since the thickness is an example, it does not prevent the thickness from being increased or decreased as necessary. Further, a metal member may be used. However, it is preferable that the weight of the upper protective plate 130 is within about 5 kg.

FIG. 3 shows a side view of the side protective plate. FIG. 4 shows a front view of the side protective plate. FIG. 5 shows a top view of the side protective plate. FIG. 6 shows a side view in a state where the side protective plates are stacked. First, since two side protection plates 110 are used as a set as a pair, they are referred to as a first side protection plate 110A and a second side protection plate 110B as shown in FIG. When the side protection plate 110 is used without particular notice, it means either or both of the first side protection plate 110A and the second side protection plate 110B. It is preferable that the length of the side protective plate 110 is the same as that of the upper protective plate 130, and the weight is within 5 kg on one side.

The side protective plate 110 includes an arc portion 111, an upper straight portion 112, and a lower straight portion 113, and is integrally formed of a material using a recycled PE material. The arc portion 111 is formed in an arc shape so as to follow the outer diameter of the protective sheet 20 wound around the outer peripheral surface of the pipe material 10. It is desirable that this length of the arc portion 111 is set to a length that covers at least about 1/4 of the peripheral length of the outer circumference of the pipe material 10.

An upper straight line portion 112 and a lower straight line portion 113 are vertically edged from the end of the arc portion 111, respectively. As shown in FIG. 6, the upper straight portion 112 and the lower straight portion 113 are adjacent to each other when they are overlapped with each other, that is, the upper straight portion 112 and the second side protective plate of the first side protective plate 110A. The surfaces of the upper straight portion 112 or the lower straight portion 113 of 110B are configured to be in contact with each other. At this time, the arc portions 111 are designed so that a gap A is formed between the arc portions 111.

The upper straight portion 112 is provided with a binding portion 114, through which a through hole 115 is provided, and a binding string 120 as shown in FIGS. 1 and 2 is passed therethrough, and a first side surface is prepared on the left and right sides. The protective plate 110A and the second side surface protective plate 110B are connected. The binding portion 114 is also provided on the lower straight portion 113 so that it can be assembled even if the side protective plate 110 is rotated. The buried pipe protective material 100 is formed by the side protective plate 110 connected by the upper protective plate 130 and the binding string 120 in this way.

Next, the method of burying the buried pipe protective material 100 of the present invention will be described. FIG. 7 schematically shows the first procedure. FIG. 8 schematically shows the second procedure. FIG. 9 schematically shows the third procedure. FIG. 10 schematically shows the fourth procedure. First, as shown in FIG. 7, the pipe material 10 is covered with a protective sheet 20 before being embedded. It is desirable that the protective sheet 20 is wrapped around the main body of the pipe material 10 and fixed by using a gas display tape or the like (not shown). In that state, the side protective plate 110 connected by the binding string 120 at the upper part is covered from above. As a result, as shown in FIG. 8, the side protective plate 110 is held by the pipe material 10. In this state, further fix with gas display tape.

Next, as shown in FIG. 9, the pipe material 10 is hung down in the groove 51 dug in the ground 50. The groove 51 is made by excavating the ground by hand or by using a heavy machine or the like, and the pipe material 10 is installed at the bottom of the groove 51. Then, as shown in FIG. 10, the earth and sand 60 is backfilled on the pipe, the pipe is covered with soil about 15 cm to 20 cm, and then the upper protective plate 130 is installed. Therefore, the protective plate 130 is arranged on the upper part of the pipe material 10, and the pipe material 10 is buried in the ground with a certain distance between the upper protective plate 130 and the pipe material 10. After that, although not shown, the groove 51 is further covered with soil and backfilled.

Since the buried pipe protective material 100 of the present embodiment has the above configuration, it exhibits the actions and effects described below.

First, as an effect, by using the buried pipe protective material 100 for protecting the pipe material 10, it is possible to provide the buried pipe protective material 100 having good workability and high transportability. This is because the buried pipe protective material 100 that protects the pipe material 10 buried in the ground has the following configuration. First, a pair of side surface protective plates 110 that cover at least 1/4 of the outer peripheral length of the pipe material 10 are provided, and the side surface protection plate 110 has an arc portion 111 whose inner surface side facing the pipe material 10 is formed in an arc shape. The upper straight portion 112 and the lower straight portion 113 corresponding to the straight portions having two parallel surfaces extending from the ends of the arc portions 111 are provided.

A binding portion 114 is provided on at least one of the upper straight portion 112 or the lower straight portion 113, and with the protective sheet 20 wrapped around the pipe material 10, the side protective plates 110 face each other with the pipe material 10 in between and bind. A pair of side protective plates 110 are connected by a binding string 120 provided in the portion 114, and an upper protective plate 130 arranged via earth and sand 60 is provided above the pipe material 10 with a predetermined gap.

Further, when the side protective plates 110 are stacked in the same direction, it is preferable that the adjacent upper straight portions 112 or lower straight portions 113 are overlapped and a gap A is formed between the adjacent arc portions 111. ..

In the buried pipe protective material 100 having such a configuration, since the upper protective plate 130 is formed in a flat plate shape and the side protective plate 110 is formed in a shape that can be overlapped with each other, the buried pipe protective material 100 is formed by using a truck or the like. Can be stacked when transporting. The side protective plate 110 is used by being bound so as to be paired with a binding string 120 when protecting the pipe material 10, but it is possible to stack the side protective plate 110 without removing the binding string 120 when transporting. This uses a binding string 120 that is easily deformed for connection, and has a length that does not hinder the stacking of the side protective plates 110. Therefore, the second side protective plate 110B is compared with the first side protective plate 110A. This is because can be rotated 180 degrees from the state shown in FIG. 2 and superposed on the state shown in FIG.

Further, since the weight of each of the upper protective plate 130 and the side protective plate 110 is suppressed to about 5 kg or less, the operator can carry one by one while ensuring the required strength. Therefore, a large number of buried pipe protective materials 100 can be transported by a small number of vehicles during the work. Further, as shown in FIG. 6, when the side protective plates 110 are stacked, a gap A is formed between the adjacent arc portions 111, so that the arc portions 111 are crushed when stacked. It can be transported without such a problem.

Further, as shown in FIG. 10, when the pipe material 10 to which the buried pipe protection material 100 is applied is buried, since the upper protection plate 130 is provided, an accident in which the pipe material 10 is accidentally damaged by a heavy machine or the like may occur. Can be prevented. In this case, since the upper protective plate 130 is arranged so as to sandwich the earth and sand 60, it is possible to prevent the pipe material 10 from being damaged even when an impact that breaks through the upper protective plate 130 is applied.

On the other hand, the side surface of the pipe material 10 is protected by the side surface protective plate 110. There are few cases where a strong force is applied from the side surface as compared with the upper surface of the pipe material 10. Since the upper protective plate 130 is arranged prominently, it is possible that the side surface is accidentally scraped, but since it is assumed that there are many rubbing patterns in accidents from the side, side protection It is considered that the pipe material 10 can be sufficiently protected if the protection such as the plate 110 is provided. Even if an impact is applied, the tube material 10 is protected because the protective sheet 20 is wrapped around the tube material 10 so that the impact can be absorbed.

Since it is considered that there is no particular need for protection of the pipe material 10 against the lower part, a protective plate such as the upper protective plate 130 or the side protective plate 110 is not provided, but rather the lower part is released. As shown, a construction method in which the side protective plate 110 connected by the binding string 120 is covered from above can be adopted, which can contribute to the improvement of workability.

Although the embodiment of the buried pipe protective material 100 according to the present invention has been described above, the present invention is not limited to this, and various changes can be made without departing from the spirit of the present invention. For example, it does not prevent the length and thickness of the upper protective plate 130 and the side protective plate 110 from being changed. However, it is desirable that the weight be set so as not to impair workability while ensuring the function as a protective material. Further, although it is assumed that 150A or 200A is assumed for the pipe material 10, it does not prevent the present invention from being applied to the pipe material 10 having other thicknesses.

Further, in the present embodiment, the binding portion 114 is provided on the upper straight portion 112 of the side protective plate 110, but the binding portion 114 is similarly provided on the lower straight portion 113 as in the upper straight portion 112. It does not prevent the 114 from being provided. With this configuration, even when the top and bottom of the side protection plate 110 are reversed, the side protection plate 110 can be paired with the binding string 120, and the workability can be improved. Further, although the materials of the protective sheet 20, the upper protective plate 130, the side protective plate 110, and the like are illustrated, the use of other materials is not hindered. Further, although the binding portion 114 is provided on both the upper straight portion 112 and the lower straight portion 113 of the side protective plate 110, it is sufficient that the binding portion 114 is provided on at least one side, and such a change is not hindered.

Further, the ratio of the length of the arc portion 111 to the peripheral length is not hindered from being changed as long as the width capable of protecting the side surface can be secured. For example, even if it is set to about 1/5, it can be set to function as protection of the side surface by lengthening the upper straight portion 112 and the lower straight portion 113, which will be described later. However, if the length of the arc portion 111 is short and the upper straight portion 112 and the lower straight portion 113 are long, it becomes difficult to fix the arc portion 111 to the pipe material 10, or the groove 51 described later for embedding the pipe material 10 is deepened. It is not preferable because it may be necessary to do so. On the other hand, if it is taken as long as about 1/3, there is an advantage in terms of protection of the pipe material 10, but since the dead space becomes large when the side protective plates 110 are stacked and conveyed, the balance around that is taken into consideration. Should be set.

10 Pipe material 20 Protective sheet 100 Buried pipe protective material 110 Side protective plates 110A, 110B 1st and 2nd side protective plates 120 Tie string 130 Upper protective plate

Claims (4)

In the buried pipe protection material that protects the pipe material buried in the ground
A pair of side protective plates covering a part along the outer circumference of the pipe material are provided.
The side protective plate is
An arc portion whose inner surface side facing the pipe material is formed in an arc shape,
A straight portion extending from the end of the arc portion and having two parallel surfaces is provided.
At least one of the straight portions has a binding portion and has a binding portion.
With the protective sheet wrapped around the pipe material, the side surface protective plates face each other with the pipe material in between, and the paired side surface protective plates are connected by a connecting string provided in the binding portion.
Having a plate-shaped upper protective plate arranged through earth and sand above the pipe material with a predetermined gap.
Buried pipe protection material characterized by. In the buried pipe protective material according to claim 1,
When the side protective plates are stacked in the same direction, the adjacent straight portions are overlapped, and a gap is formed between the adjacent arc portions.
Buried pipe protection material characterized by. In the buried pipe protective material according to claim 1 or 2.
The arc portion of the side protective plate is formed so as to cover at least 1/4 of the peripheral length of the outer circumference of the pipe material.
Buried pipe protection material characterized by. In the buried pipe protection method that protects the pipe material buried in the ground,
Wrap a protective sheet around the pipe material and
One side protection plate that partially covers the outer circumference of the pipe material is connected to the other side protection plate by a connecting string that penetrates and connects the binding portion provided on the upper portion of the side protection plate to form a pair. ,
From the upper part of the pipe material, the pipe material is sandwiched and fixed by the paired side protection plates.
The pipe material with the side protective plate fixed to the groove dug in the ground is lowered.
A certain amount of earth and sand is sprinkled on the pipe material, a plate-shaped upper protective plate is placed above the pipe material through the earth and sand, and the pipe material is further filled with the earth and sand.
A method for protecting buried pipe materials.

Images