Pipe support tool

Abstract

To provide a pipe support tool which enables improvement of workability when a pipe is embedded and simplification of an embedding process.SOLUTION: A pipe support tool 10 supports an underground pipe having a socket and an insertion port. The support tool 10 has a saddle-like support part 11 for supporting a pipe bottom part of the insertion port.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a pipe support. [Background technology]

[0002] Underground pipes can only perform to their full potential when they are installed with sufficient compaction of the foundation materials. Generally, when burying a pipe underground, (1) the bottom surface is formed in the excavated recess (trench) (pipe bed finishing), (2) the joints are excavated, (3) the pipe is placed on the bottom surface, (4) the bottom side of the pipe is tamped, (5) the area around the pipe is compacted, and (6) the pipe is backfilled and then buried. In (2) digging the joints, the bottom of the area where the pipe joint (receiving port) will be located is excavated. In (4) compacting the bottom side of the pipe, the foundation material is sufficiently compacted so that no gaps are created on the bottom side of the pipe. By thoroughly compacting the bottom side of the pipe, the pipe can be buried stably. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-82811 Summary of the Invention [Problem to be solved by the invention]

[0004] In burying a pipe, it is necessary to perform thorough compaction of the foundation material from the bottom of the pipe to the side of the pipe. Patent Document 1 discloses a support base (support) that supports an underground buried pipe. Patent Document 1 discloses arranging a plurality of supports at a predetermined interval (about 1 m) and placing a pipe on the upper surface of the supports. In this case, a gap is generated between the bottom side and the bottom surface of the pipe between adjacent supports, so compaction is necessary. In this case, there is a risk of poor construction due to insufficient compaction. In addition, in the support described in Patent Document 1, stress is concentrated at the contact part between the pipe bottom and the support, so when a plastic pipe is used, there is a risk of the pipe being destroyed due to stress concentration at the contact part between the plastic pipe and the support. In addition, when burying a pipe, it is necessary to dig a joint of the joint part according to the difference in outer diameter between the joint part (receiving port) and the main part (insertion port) of the pipe. In this case, there is a risk of poor construction due to inappropriate digging of the joint part.

[0005] The present disclosure has been made in consideration of the above-mentioned circumstances, and aims to provide a pipe support device that can improve workability when burying pipes and simplify the burying process. [Means for solving the problem]

[0006] In order to solve the above problems, the present disclosure proposes the following means. (1) One aspect of the present disclosure is a pipe support for supporting an underground buried pipe having a receiving port and a plug, the support having a saddle-shaped support portion that supports a pipe bottom at the plug. (2) In the pipe support described in (1) above, the support portion may be arc-shaped when viewed in the longitudinal direction of the underground pipe. (3) The pipe support described in (1) or (2) above may have a length along the longitudinal direction of the underground buried pipe that is the same as the longitudinal length of the insertion port. (4) The pipe support device according to (1) or (2) above may be configured so that two or more of the supports are arranged in series to support the underground pipe. (5) In the pipe support described in (2) above, the radius of the arc shape of the support portion may be more than 1.0 times and not more than 1.3 times the radius of the outer periphery of the insertion port. (6) The pipe support described in (2) above may have a width, as viewed in the longitudinal direction of the underground buried pipe, that is 1.1 to 2.0 times the outer diameter of the insertion port. (7) In the pipe support device described in (1) or (2) above, the height of the support portion may be 0.25 to 0.5 times the outer diameter of the insertion port. Effect of the Invention

[0007] According to the present disclosure, it is possible to provide a pipe support that can improve workability when burying a pipe and simplify the burying process. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a tube support according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a front view showing a state in which a pipe is supported by the support device of the present embodiment. [Diagram 3] FIG. 2 is a view taken along the line II-II' of FIG. [Figure 4] 1 is a schematic diagram showing a state in which a pipe is embedded using the pipe support of this embodiment. FIG. [Diagram 5] 5 is a view taken along a line V in FIG. 4. [Figure 6] FIG. 11 is a perspective view showing a modified example of the pipe support of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, a pipe support according to one embodiment of the present disclosure will be described with reference to the drawings. Fig. 1 is a perspective view showing a pipe support 10 of this embodiment. Fig. 2 is a front view showing a state in which a pipe 20 described below is supported by two supports 10. Fig. 3 is a view taken along the line II-II' in Fig. 1. 1 to 3, the longitudinal direction of the pipe 20 is the X direction, the up-down direction is the Z direction, and the direction perpendicular to the X and Z directions is the Y direction. The direction of the support 10 along the X direction may be referred to as the longitudinal direction, the direction of the support 10 along the Y direction may be referred to as the width direction, and the direction of the support 10 along the Z direction may be referred to as the height direction. In addition, the drawings used in the following explanation may show characteristic parts in an enlarged manner for the sake of convenience in order to make the features easier to understand, and the dimensional ratios of each component may differ from the actual ones.

[0010] The support 10 is buried in the ground with the pipe 20 supported by the support 10. The pipe 20 is used, for example, as an underground buried pipe for water supply and sewerage, a sewerage pipe, an agricultural irrigation channel, water supply and industrial water supply, small hydroelectric power generation, high head treatment works, a shield tunnel, a factory plant, repair of deteriorated pipelines, and the like. In this embodiment, a case will be described in which the pipe 20 is an underground buried pipe for water supply and sewerage. When the pipe 20 is buried in the ground, it is arranged with an inclination of, for example, about 3 / 100 (inclination of 3 mm for every 1000 mm of extension) so that water can easily flow. In FIG. 1, two supports 10 are arranged so as to be continuously aligned in the X direction. The two supports 10 are aligned in the X direction with no gap between them. The supports 10 have a support portion 11 that supports the pipe 20. The support portion 11 is saddle-shaped. The support portion 11 is saddle-shaped, and in the illustrated example, the length L10 of the support 10 in the longitudinal direction is approximately the same as the width D10 of the support 10. The support portion 11 is curved when viewed in the longitudinal direction. The support portion 11 is concave (recessed) toward the lower side in the Z direction. The support portion 11 is formed on the upper surface 12 of the support 10. The support portion 11 is formed over the entire longitudinal direction of the support 10. The support portion 11 is formed penetrating the longitudinal direction of the support 10. In FIG. 1, the two supports 10 are arranged so that the support portions 11 are continuously aligned along the X direction.

[0011] The pipes 20 have a socket 21 and an insertion port 22. The pipes 20 are connected in series by inserting the insertion port 22 of one pipe 20 into the socket 21 of the other pipe 20. The support 10 supports the pipe 20 from below. Specifically, the support 10 supports the pipe bottom 23 of the insertion hole 22. The support part 11 of the support 10 supports the pipe bottom 23 of the insertion hole 22. When the longitudinal direction (X direction) of the pipe 20 is the left-right direction as shown in Fig. 2, the pipe bottom 23 refers to the lower part of the insertion hole 22 (see Fig. 3). The pipe bottom 23 is the lower part of the pipe 20 when it is buried. In the Z direction, a support surface height C (mm) from the lower surface 13 of the support tool 10 to the support portion 11 corresponds to the wall thickness of the socket 21. The support surface height C is expressed by the following formula 1. ((Outer diameter D21 of socket 21)-(Outer diameter D20 of pipe 20)) / 2 (Equation 1) As shown in FIG. 2, when the pipe 20 is supported by the support 10, the lower end 24 of the socket 21 of the pipe 20 and the lower surface 13 of the support 10 are flush with each other.

[0012] FIG. 4 is a schematic diagram showing a state in which a pipe 20 is buried in the ground using supports 10. FIG. 5 is an arrow view seen from the V direction of FIG. 4. In FIG. 4, five supports 10 are arranged continuously in the X direction. The five supports 10 are arranged without any gaps in the X direction. The number of supports 10 supporting the pipe 20 is not limited to five. For example, one support 10 may support the pipe 20, or two or more supports 10 may be arranged continuously to support the pipe 20. When there are two or more supports 10, adjacent supports 10 are arranged continuously in close contact with each other. When two or more supports 10 are arranged in series, adjacent supports 10 do not need to be connected, or the supports 10 may be connected to each other by adhesion, fitting, or the like. In FIG. 4, for the sake of simplicity, one pipe 20 is shown, but in practice, the pipes 20 are connected in series when used. The support 10 and the tube 20 may be fixed together by adhesion, fitting, or the like. The pipe 20 is buried, for example, at a depth of between 0.2 m and 30 m below the ground surface.

[0013] An example of a method for burying the pipe 20 in the ground will now be briefly described. The location where the pipe 20 will be buried is excavated (pipe excavation). Good quality soil is used in the recess (trench) in the excavated ground to form a bottom surface H on the base bed B (pipe bed finishing). The support 10 is placed on the bottom surface H. When placing multiple supports 10, the multiple supports 10 are placed in a continuous line. The pipe 20 is laid on top of the support parts 11 of the support 10. The area around the pipe 20 is compacted with foundation material S. Backfilling is performed up to the top of the pipe 20, and the pipe 20 is buried. Figure 5 shows the pipe 20 backfilled with foundation material S.

[0014] A support 10 is placed under the pipe 20, and the insertion opening 22 of the pipe 20 is supported by the support 10. This prevents any gap from being created between the pipe bottom 23 of the pipe 20 and the bottom surface H. Also, because the lower end 24 of the socket 21 of the pipe 20 is in contact with the bottom surface H, no gap is created between the socket 21 and the bottom surface H (see FIG. 2). This eliminates the need for a joint digging process where the joint (socket 21) of the pipe 20 contacts the bottom surface H and a tamping process for the pipe bottom side. This reduces the risk of poor construction due to improper joint digging.

[0015] The support 10 according to this embodiment can improve ease of installation when burying the pipe 20 and simplify the embedding process.

[0016] 1, in the support 10 according to this embodiment, the support portion 11 is arc-shaped when viewed from the longitudinal direction of the pipe 20. In other words, the support portion 11 when viewed from the longitudinal direction of the pipe 20 is semicircular or a part of a semicircular shape. By making the support portion 11 arc-shaped, the pipe 20 can be stably supported and stress concentration at the pipe bottom portion 23 can be suppressed. Since stress concentration at the pipe bottom portion 23 can be suppressed, the pipe 20 can be adapted to a resin pipe (flexible pipe) such as an FRPM pipe (Fiberglass Reinforced Plastic Mortar Pipes). A flexible pipe is a pipe used in water channels, with an allowable deflection rate of the pipe body of 3% or more.

[0017] The length L10 (mm) of the support 10 along the longitudinal direction (X direction) of the pipe 20 may be the same as the length L22 (mm) of the insertion port 22 in the longitudinal direction (X direction). With this configuration, the support 10 supports the pipe bottom 23 of the insertion port 22 from one end to the other end in the longitudinal direction. This makes it possible to more stably support the pipe 20 and further suppress stress concentration at the pipe bottom 23.

[0018] From the viewpoint of workability, the length L10 of the support 10 in the longitudinal direction is, for example, preferably 3 m or less, more preferably 2 m or less, and even more preferably 1 m or less. When multiple supports 10 are arranged, the multiple supports 10 may be arranged continuously to support the pipe 20. The length and number of the supports 10 may be flexibly adjusted to correspond to the length of the pipe 20.

[0019] In the case where the pipe 20 is bent as viewed from the Z direction, the support 10 may include a support portion 11 having a bending angle corresponding to the bending angle of the pipe 20. The support portion 11 having a bending angle corresponding to the bending angle of the pipe 20 supports the pipe 20. In the case where the pipe 20 is a combination of a straight pipe 20 and a bent pipe 20, for example, the support 10 may be configured to combine a support 10 having a straight support portion 11 and a support 10 having a bent support portion 11 in accordance with the shape of the pipe 20.

[0020] The radius RA (mm) of the arc shape of the support part 11 is more than 1.0 times and not more than 1.3 times the radius RB (mm) of the outer periphery of the insertion port 22. This increases the contact area between the support part 11 and the insertion port 22, and enables stable support of the pipe 20. Preferably, the radius RA of the arc shape of the support part 11 is more than 1.1 times and not more than 1.2 times the radius RB of the outer periphery of the insertion port 22.

[0021] The width D10 (mm) of the support 10 as viewed from the longitudinal direction (X direction) of the pipe 20 is 1.1 to 2.0 times the outer diameter D22 (mm) of the insertion port 22. For example, when the outer diameter of the insertion port 22 is 500 mm, the width D10 of the support 10 is 550 mm to 1000 mm. If the width D10 of the support 10 is less than 1.1 times the outer diameter D22 of the insertion hole 22, the support 10 may be damaged by the weight of the pipe 20 or by the soil pressure. If the width D10 of the support 10 is more than 2.0 times the outer diameter D22 of the insertion hole 22, the excavation width becomes wider, resulting in poor workability. From this viewpoint, the width D10 of the support 10 as viewed in the longitudinal direction of the support 10 is preferably 1.1 to 1.5 times the outer diameter D22 of the insertion hole 22.

[0022] The height H10 (mm) of the support portion 11 is 0.25 to 0.5 times the outer diameter D22 (mm) of the insertion port 22. The height H10 of the support portion 11 is the distance from the lower surface 13 to the upper surface 12 of the support 10 in the Z direction. If the height H10 of the support portion 11 is less than 0.25 times the outer diameter D22 of the insertion port 22, the pipe 20 is likely to lose balance when installed in the support portion 11. If the height H10 of the support portion 11 is more than 0.5 times the outer diameter D22 of the insertion port 22, the workability of installing the pipe 20 deteriorates. From this viewpoint, the height H10 of the support portion 11 is preferably 0.25 to 0.4 times the outer diameter D22 of the insertion port 22.

[0023] The material of the support 10 may be concrete, metal, synthetic resin, recycled material, etc. The material of the support 10 may be the same as that of the pipe 20, or recycled material of the pipe 20 may be used. The material of the support 10 may be, for example, FRP (Fiberglass Reinforced Plastic) resin. FRP resin is a glass base material and a resin impregnated into the glass base material. Examples of the glass base material include general-purpose E glass, ECR glass, R glass, and C glass. Among these, ECR glass has excellent alkali resistance and acid resistance. Therefore, if ECR ​​glass is used as the glass base material that provides the strength, it can be expected that the performance of the FRP resin will be maintained even if the soil becomes acidic after burial. Examples of the form of the glass substrate include chopped strand mat, glass cloth, roving cloth, and glass paper.

[0024] Examples of the resin impregnated into the glass substrate include general-purpose resins for hand layup such as orthophthalic acid-based liquid unsaturated polyester resins, and thermosetting resins having excellent alkali resistance from among general-purpose resins commonly used in hand layup. The thermosetting resin includes at least one selected from isophthalic acid-based liquid unsaturated polyester resins, terephthalic acid-based liquid unsaturated polyester resins, vinyl ester resins, and epoxy resins. These thermosetting resins may be used alone or in combination of two or more. The resin impregnated into the glass substrate may also include other highly corrosion-resistant resins.

[0025] The material of the support 10 may be, for example, a fiber-reinforced curable resin foam molded body (fiber-reinforced foam molded body). The resin constituting the fiber-reinforced foam molded body is not particularly limited, but from the viewpoint of strength, a thermosetting resin is preferable. Specific examples of the thermosetting resin include polyurethane resin, phenolic resin, unsaturated polyester resin, diallyl phthalate resin, vinyl ester resin, epoxy resin, urea resin, melamine resin, polyimide resin, polyamide-imide resin, and acrylic resin. In order to obtain a lightweight and high-strength support 10, the resin is preferably a foam of a rigid polyurethane resin.

[0026] The fibers contained in the fiber-reinforced foam are not particularly limited as long as they function as reinforcing fibers, and examples thereof include monofilaments, fibrillated fibers (with protruding whisker-like fibers), woven yarns, etc. The fibers may be, for example, only glass fibers, or composite fibers in which glass fibers are combined with reinforcing fibers such as carbon fibers or synthetic fibers.

[0027] The fiber-reinforced foamed molded article may be one that has been used more than once (recycled material), or it may be an unused material.

[0028] The fiber-reinforced foamed molded article may be prepared by impregnating a reinforcing long fiber bundle aligned in one direction with a composition containing a polyol compound, an isocyanate compound, and fibers.

[0029] The fiber-reinforced foamed molded product may contain other components such as a filler other than the above-mentioned fibers, a foaming agent, a foam stabilizer, a catalyst, etc. The method for mixing the above-mentioned components is not particularly limited.

[0030] If water accumulates around the outer periphery of support 10 due to rising groundwater, support 10 may float up. The specific gravity of the material of support 10 is preferably 1.6 to 8. If the specific gravity of the material of support 10 is less than 1.6, support 10 may float up due to rising water. If the specific gravity of the material of support 10 exceeds 8, support 10 may sink due to its own weight. From this viewpoint, the specific gravity of the material of support 10 is more preferably 1.8 to 3.

[0031] The compressive strength of the support 10 is 10N / mm 2 More than 15N / mm is preferable. 2 More preferably, the compressive strength of the support 10 is 10 N / mm 2 If it is less than this, the support 10 may be destroyed by the vertical load from the pipe 20 and the backfill soil. The tensile strength of the support 10 is 10 N / mm 2 More than 15N / mm is preferable. 2 More preferably, the tensile strength of the support 10 is 10 N / mm 2 If it is less than this, the support 10 may be destroyed by the vertical load from the pipe 20 and the backfill soil.

[0032] Next, there will be shown modified examples of the support 10. The support 10 may be made lighter. For example, the support 10 may be provided with a recess. Fig. 6 shows a support 10A as an example of a modified example. As shown in Fig. 6, the support 10A has through holes 30. In the support 10A shown in Fig. 6, the through holes 30 penetrate in the Z direction from the upper surface 12 to the lower surface 13 of the support 10A. When through holes are provided in the Z direction in the support 10A, the support 10A is prevented from floating up. In the example of Fig. 6, eight through holes 30 are formed, but there is no limit to the number of through holes 30. The through holes 30 may be provided in the support portion 11. As shown in Fig. 6, the through holes 30 may be provided in the Z direction, or the through holes 30 may be provided in the X direction or the Y direction. The cross-sectional shape of the through-hole 30 itself may be a circle as shown in FIG. 6, a rectangle, an ellipse, or any other shape, and is not particularly limited.

[0033] (Example) An example of the present disclosure will be described. The workability of burying a pipe 20 was verified using the support 10 of the present disclosure. In this example, five supports 10 shown in FIG. 1 were used. Details of each support 10 are as follows. Longitudinal length L10: 756mm Width D10: 1096mm Height H10: 547mm Radius RA of the arc of the support 11: 522 mm Length E of the width of the upper surface 12: 26 mm Support surface height C: 26mm Material: FRP resin

[0034] In this embodiment, the tube 20 shown in Figures 2 and 3 was used. The details of the tube 20 are as follows. Longitudinal length: 4000mm Outer diameter of socket 21 D21: 1095mm Outer diameter of tube 20 D20: 1043mm Length of insertion hole 22 L22: 3780mm Material: FRPM

[0035] The pipe 20 was buried as shown in Figures 4 and 5. The trench necessary for laying the above-mentioned pipe 20 was excavated, and a base B was made using good quality soil to form a bottom surface H. Five supports 10 were arranged in a row on the bottom surface H with the support parts 11 on the upper side. The pipe 20 was laid on these supports 10. In detail, the pipe 20 was laid so that the insertion opening of the pipe 20 was aligned with the support parts 11 of the supports 10. At this time, the support 10 was marked in advance and the pipe 20 was laid in an appropriate place. Thereafter, as shown in Figure 5, the supports 10 and the pipe 20 were buried in a base material S around them.

[0036] In this manner, in this embodiment, the insertion port 22 of the pipe 20 was laid in the saddle-shaped support portion 11. As a result, no gap was generated between the pipe bottom portion 23 of the pipe 20 and the bottom surface H. In addition, since the lower end 24 of the socket 21 of the pipe 20 contacts the bottom surface H, no gap was generated between the socket 21 and the bottom surface H. As a result, the process of digging the joint where the joint (socket 21) of the pipe 20 contacts the bottom surface H and the process of compacting the pipe bottom side are unnecessary, and it has been confirmed that the risk of poor construction due to inappropriate execution of these processes is reduced and the construction process is simplified.

[0037] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. Within the scope of the present invention, the components in the above-described embodiment may be replaced with well-known components as appropriate, and the above-described modified examples may be combined as appropriate. [Explanation of symbols]

[0038] 10,10A support 11 Support part 21 Underbite 22 Insertion port 20 pipes (underground pipes) 23 Bottom of tube 30 Through hole

Claims

1. A pipe support for supporting an underground buried pipe having a socket and a spigot, The support is a pipe support having a saddle-shaped support portion that supports the pipe bottom portion of the insertion port.

2. 2. The pipe support according to claim 1, wherein the support portion is arc-shaped when viewed in the longitudinal direction of the underground pipe.

3. 3. The pipe support according to claim 1, wherein the length of said support along the longitudinal direction of said underground pipe is the same as the length of said insertion port in the longitudinal direction.

4. 3. The pipe support according to claim 1 or 2, wherein two or more of said supports are arranged in series to support said underground pipe.

5. The pipe support according to claim 2 , wherein the radius of the arc of the support portion is greater than 1.0 times and less than or equal to 1.3 times the radius of the outer periphery of the insertion port.

6. 3. The pipe support according to claim 2, wherein the width of the support as viewed in the longitudinal direction of the underground pipe is 1.1 to 2.0 times the outer diameter of the insertion port.

7. 3. The pipe support according to claim 1, wherein the height of the support portion is 0.25 to 0.5 times the outer diameter of the insertion port.

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