Piping installation methods

Abstract

To provide a tube construction method, etc. which enables improvement of efficiency of work for shutting off water between a sheath tube and an installed tube.SOLUTION: In a tube construction method, a plate-like part 12, having a shape which corresponds to a gap between a sheath tube 31 and an installed tube 33 inserted into the sheath tube 31, is inserted into the sheath tube 31 through an opening of the sheath tube 31 and a handle part 17 attached to the plate-like part 12 is held at the outside of the opening. Then, a filler 19 is loaded into a space between the plate-like part 12 and the opening and the handle part 17 is removed. The handle part 17 is removed from drawing out the handle part 17 from the filler 19, and a hole occurring in the filler 19 is filled.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a method of installing pipes. In the law

Background Art

[0002] Many lifelines such as electricity, gas, water supply and sewerage, and communication are supplied to consumers through pipes buried underground. A so-called pipe-in-pipe method is used in which a plurality of laid pipes are arranged inside a sheath pipe buried underground.

[0003] A filler that can be filled between the sheath pipe and the laid pipe has been proposed over substantially the entire length of the sheath pipe (Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By filling a filler between the sheath pipe and the laid pipe, intrusion of water or the like into the sheath pipe can be prevented.

[0006] However, since the gap between the sheath pipe and the laid pipe is small, it takes time to fill the filler over the entire length of the sheath pipe. Furthermore, when the filler is filled over substantially the entire length of the sheath pipe, maintenance work such as replacement of the laid pipe becomes difficult.

[0007] On one side, it is an object to provide a method of installing pipes that can improve the efficiency of the work of stopping water between the sheath pipe and the laid pipe. Law

Means for Solving the Problems

[0008] ​​The piping installation method is based on the shape corresponding to the gap between the sheath pipe and the laying pipe inserted into the sheath pipe. has plate-like part The male threaded portion provided at the end of the handle is screwed into the screw hole provided in the plate-shaped part Insert the following into the interior of the sheath tube through the opening of the sheath tube: The aforementioned Handle part 、 The plate-shaped portion is held outside the opening, and a filler is filled between the plate-shaped portion and the opening. After filling with the aforementioned filler, the handle portion is rotated to remove the male threaded portion from the screw hole, the handle portion is removed, and the hole created in the filler is filled. [Effects of the Invention]

[0009] One aspect is that it can streamline the process of sealing the gap between the sheath pipe and the laying pipe, a method of pipe installation. Law We can provide it. [Brief explanation of the drawing]

[0010] [Figure 1] This is a perspective view of a filler jig for sealing the opening of a pipe. [Figure 2] This is a front view of the plate-like section. [Figure 3] This is a front view of the modified plate-like section. [Figure 4] This is an explanatory diagram illustrating a schematic method for installing piping. [Figure 5] This is an explanatory diagram illustrating a schematic method for installing piping. [Figure 6] This is an explanatory diagram illustrating a schematic method for installing piping. [Figure 7] This is an explanatory diagram illustrating the positional relationship between the piping and the water-sealing filling aid for the pipe opening. [Figure 8] This is an explanatory diagram illustrating a schematic method for installing piping. [Figure 9] This is an explanatory diagram illustrating a schematic method for installing piping. [Figure 10] This is an explanatory diagram illustrating the method of installing piping. [Figure 11] This is an explanatory diagram illustrating the piping installation method of Embodiment 2. [Figure 12] This is an explanatory diagram illustrating the piping installation method of Embodiment 2. [Modes for carrying out the invention]

[0011] [Embodiment 1] FIG. 1 is a perspective view of a filling auxiliary jig 10 for water stop at the pipe nozzle portion. The filling auxiliary jig 10 for water stop at the pipe nozzle portion includes a plate-like portion 12 and a handle portion 17 attached substantially perpendicular to the plate-like portion 12. In FIG. 1, a hexagonal bolt with a half thread is used for the handle portion 17.

[0012] FIG. 2 is a front view of the plate-like portion 12. The plate-like portion 12 is a plate having a shape in which a plurality of circular depressions are provided at the edge of the outer peripheral circle indicated by the two-dot chain line. In the following description, the remaining portion of the outer peripheral circle is referred to as the outer peripheral portion 14, and the depressed portion is referred to as the laying pipe holding portion 15.

[0013] FIG. 2 shows an example of the plate-like portion 12 provided with three laying pipe holding portions 15. The plurality of laying pipe holding portions 15 are spaced apart from each other. Each laying pipe holding portion 15 is continuous with the outer peripheral portion 14. Chamfers are provided at the boundary between the outer peripheral portion 14 and the laying pipe holding portion 15. A handle holding hole 16 is provided at a position closer to the outer periphery than the center of the circle forming the outer peripheral portion 14. In the present embodiment, the handle holding hole 16 is a through screw hole.

[0014] That is, the plate-like portion 12 is a plate of uniform thickness having an outer contour line in which three convex curved portions and three concave curved portions are alternately arranged. The three convex curved portions are part of the arc forming the outer peripheral circle indicated by the two-dot chain line. The three concave curved portions are each part of an arc forming a different circle. The centers of the three concave curved portions are all arranged inside the outer peripheral circle indicated by the two-dot chain line.

[0015] Let's return to Figure 1 and continue the explanation. The male screw provided at the end of the handle portion 17 is screwed into the handle holding hole 16, which was explained using Figure 2. The handle holding hole 16 and the handle portion 17 are not fastened together, and if the worker rotates the handle portion 17 counterclockwise, the handle portion 17 will come out of the handle holding hole 16, separating the plate portion 12 from the handle portion 17. However, the thickness of the plate portion 12 is more than 10 times the pitch of the screw portion, so the plate portion 12 and the handle portion 17 will not separate unless the worker intentionally continues to rotate the handle portion 17 in one direction.

[0016] The dimensions of the water-stopping filling aid jig 10 for the pipe opening shown in Figures 1 and 2 are described below. The outer diameter of the plate-shaped part 12 is 96 mm, and its thickness is 20 mm. The handle part 17 is an M9 hexagonal bolt with a length of 260 mm. The pitch of the threaded part is 1.5 mm, and the length of the threaded part is 43 mm. Therefore, the handle holding hole 16 and the handle part 17 can be screwed together over 13 threads or more.

[0017] The plate-shaped part 12 and the handle part 17 are delivered to the work site separately. Immediately before use, the worker removes the plate-shaped part 12 and attaches the handle part 17 to the handle holding hole 16. Using a general-purpose hexagonal bolt for the handle part 17 reduces costs. Alternatively, a specially designed handle part 17 may be used instead of the hexagonal bolt.

[0018] Figure 3 is a front view of a modified plate-shaped section 12. Figure 3 shows an example of a plate-shaped section 12 provided with two pipe laying support sections 15. The shapes of the plate-shaped section 12 shown in Figures 2 and 3 are all illustrative. The plate-shaped section 12 may have one or more pipe laying support sections 15. The male threaded section and handle holding hole 16 of the handle section 17 may be, for example, metric fine-pitch threads or inch threads. By using fine-pitch threads, the number of threads that the handle holding hole 16 and the handle section 17 engage with increases, thus preventing the plate-shaped section 12 and the handle section 17 from coming apart against the operator's will.

[0019] The plate-like portion 12 is made of, for example, resin and manufactured by injection molding. If small quantities of plate-like portions 12 of various types are required, the plate-like portion 12 may be created using a 3D printer. The plate-like portion 12 may also be made of metal.

[0020] Figures 4 to 6 are schematic diagrams illustrating the piping installation method. Figure 4 shows the state in which the sheath pipe 31 is buried in the ground. The sheath pipe 31 is buried by any construction method, such as pipe jacking or open cut. For maintenance purposes, the internal components may be removed from the existing sheath pipe 31.

[0021] Figure 5 shows a state in which one opening of the sheath pipe 31 is exposed from a cliff-like terrain. The opening of the sheath pipe 31 may also be exposed inside a special section buried underground. Figure 5 shows a state in which multiple laying pipes 33 are inserted inside the sheath pipe 31. Laying pipes 33 may be inserted for example, power cables or communication cables. Laying pipes 33 that already have power cables or communication cables inserted may be inserted into the sheath pipe 31. Laying pipes 33 may be supply pipes for fluids such as water or gas. Supply pipes for water or gas may be inserted inside the laying pipes 33.

[0022] Figure 6 shows the state in which the water-stopping filling aid jig 10 for the pipe opening is inserted from the opening of the sheath pipe 31. The worker holds the handle portion 17 in their hand and pushes the plate-shaped portion 12 between the sheath pipe 31 and the laying pipe 33 from the tip side of the laying pipe 33. The pushing depth L should preferably be about the same as the diameter of the outer circumference portion 14.

[0023] Figure 7 is an explanatory diagram illustrating the positional relationship between the piping and the water-sealing filling aid jig 10 for the pipe opening. Figure 7 shows a cross-sectional view cut at the front portion of the plate-shaped part 12, with the water-sealing filling aid jig 10 for the pipe opening, as described using Figures 1 and 2, inserted from the opening of the sheath pipe 31. The plate-shaped part 12 has a shape corresponding to the gap between the sheath pipe 31 and the laid pipe 33. The laid pipes 33 are held between the three laid pipe holding parts 15 and the sheath pipe 31. Therefore, the laid pipes 33 are arranged approximately evenly inside the sheath pipe 31.

[0024] As shown in Figure 7, the diameter of the outer circumference 14 is smaller than the inner diameter of the sheath pipe 31. The inner diameter of the pipe laying support portion 15 is larger than the outer diameter of the pipe laying support portion 33 that each of them holds.

[0025] Because there are gaps between the inner surface of the sheath pipe 31 and the outer circumference 14, and between the outer surface of the laid pipe 33 and the laid pipe holding part 15, the worker can easily insert the water-sealing filling aid jig 10 into the pipe opening. The worker adjusts the position of the plate-shaped part 12 so that no excessive force is applied to the laid pipe 33 and the sheath pipe 31.

[0026] Figures 8 to 10 are schematic diagrams illustrating the piping installation method. Figure 8 shows the state in which the filler 19 has been filled into the front side of the plate-shaped part 12. The filler 19 is, for example, clay-like and, when filled without gaps, has waterproofing properties that prevent water and soil from passing through. The worker inserts a suitable amount of torn filler 19 into the gap between the sheath pipe 31 and the laying pipe 33, and then pushes it in using a pressing tool such as a tamping rod. The filler 19 may also be self-swelling. When filling with the filler 19, the worker should hold the handle 17 to avoid pushing the plate-shaped part 12 in too far.

[0027] As shown in Figure 8, some of the filler 19 penetrates deeper than the plate-shaped portion 12 through the gap around the plate-shaped portion 12. However, by making the gap sufficiently narrow relative to the viscosity of the filler 19, most of the filler 19 remains in front of the plate-shaped portion 12.

[0028] Figure 9 shows the state after the handle portion 17 has been removed. The worker rotates the handle portion 17 counterclockwise to remove the male screw portion from the handle holding hole 16. Note that since the handle holding hole 16 is located closer to the outer circumference than the center of the circle that makes up the outer circumference portion 14, when the worker rotates the handle portion 17, the plate-shaped portion 12 does not rotate relative to the sheath tube 31, but the handle portion 17 rotates relative to the plate-shaped portion 12. After that, the worker pulls the handle portion 17 out of the filler 19.

[0029] In Figure 9, a through-hole is formed in the area where the handle portion 17 has been pulled out. If the filler 19 has sufficient fluidity, the filler 19 may flow into the through-hole, potentially causing it to become a depression or cavity.

[0030] Figure 10 shows the state after the worker has backfilled the formed through-hole. The worker pushes in the filler 19 using a pressing tool such as a tamping rod to seal the through-hole. The worker adds more filler 19 as needed. With this, the filling of the filler 19 between the sheath pipe 31 and the laying pipe 33 is completed.

[0031] According to this embodiment, the filler 19 can be filled only near the opening of the sheath pipe 31. Because the filler is only near the opening, the filler 19 can be filled in a short time. The filler 19 seals the end of the sheath pipe 31, preventing water and soil from entering the inside of the sheath pipe 31. It also prevents ground subsidence caused by soil around the sheath pipe 31 entering the inside of the sheath pipe 31.

[0032] The filler 19 prevents insects and small animals from entering the sheath pipe 31, thus preventing damage to cables and other components. Since the filler 19 hardly penetrates beyond the plate-like section 12, maintenance work such as replacing or adding laying pipes 33 can be easily performed. Because the filler 19 is not consumed in excessive amounts and the time required for filling work is short, construction costs can be reduced.

[0033] According to this embodiment, since each laying pipe 33 is held by the laying pipe holding part 15, the laying pipes 33 can be arranged substantially evenly. Therefore, the occurrence of areas where the laying pipes 33 are too close together and the filler material 19 is not sufficiently filled is prevented, and the filler material 19 can be reliably filled.

[0034] If there is sufficient dimensional clearance in the plate-like portion 12, multiple handle-holding holes 16 may be provided in the plate-like portion 12, and a handle portion 17 may be attached to each handle-holding hole 16. For example, when using two handle portions 17, one worker may support the handle portions 17 with both hands, while another worker fills the filler 19.

[0035] [Embodiment 2] This embodiment relates to a water-stopping filling aid jig 10 for a pipe opening, to which a plate-shaped portion 12 and a handle portion 17 are fixed. Parts common to Embodiment 1 will not be described.

[0036] Figures 11 and 12 are schematic diagrams illustrating the installation method of the piping according to Embodiment 2. In this embodiment, the handle holding hole 16 is a through hole with a smaller diameter than the outer diameter of the male threaded portion of the handle 17. It is desirable that the diameter of the handle holding hole 16 be approximately the effective diameter of the male threaded portion. By screwing the male threaded portion into the handle holding hole 16, so-called self-tapping occurs, in which the resin plate-shaped portion 12 deforms due to the metallic male threaded portion, and the tip of the handle 17 is fixed to the plate-shaped portion 12.

[0037] In Figure 11, the handle portion 17 does not penetrate the plate portion 12, but rather protrudes from one side of the plate portion 12, and the handle portion 17 is fixed in this position. Because the tip of the handle portion 17 is embedded in the plate portion 12, the plate portion 12 and the handle portion 17 cannot be easily separated. Therefore, the pipe opening water-stopping filling aid jig 10 can be transported to the work site with the plate portion 12 and the handle portion 17 assembled.

[0038] Figure 11 shows the same work steps as in Figure 8 of Embodiment 1. The filler 19 is filled into the front side of the plate-shaped portion 12. The worker cuts the handle portion 17 using a tool such as a bolt cutter. Figure 12 shows the state after cutting.

[0039] According to this embodiment, the work of assembling the water-stopping filling aid jig 10 at the work site and the work of sealing the hole after removing the handle portion 17 are unnecessary, thus reducing the burden on the workers.

[0040] The plate-shaped portion 12 and the handle portion 17 may be joined together using any joining means, such as adhesive or welding. The plate-shaped portion 12 may be integrally molded at the tip of the handle portion 17 by insert molding. The handle portion 17 may be made of resin, and the plate-shaped portion 12 and the handle portion 17 may be integrally molded, for example, by injection molding.

[0041] The technical features (constituent elements) described in each embodiment are combinable with each other, and by combining them, new technical features can be formed. The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of the present invention is indicated by the claims, not in the sense described above, and all modifications within the sense and scope equivalent to the claims are intended to be included.

[0042] The independent and dependent claims described in the claims can be combined with each other in any combination, regardless of the form of reference. Furthermore, while the claims use a multi-claim format in which claims refer to two or more other claims (multi-claim format), this is not the only option. Claims may also be described using a multi-claim format in which at least one multi-claim is referenced (multi-multi-claim format). [Explanation of symbols]

[0043] 10. Water-stopping filling aid for pipe openings 12 Plate-shaped part 14 Outer perimeter 15 Laying pipe holding part 16 Handle retention holes 17 Handle section 19 Filler 31 Sheath tube 33 Laying pipe

Claims

1. The male threaded portion at the end of the handle is screwed into the screw hole provided in the plate-shaped portion which has a shape corresponding to the gap between the sheath pipe and the laying pipe inserted into the sheath pipe. The plate-like portion is inserted into the interior of the sheath tube through the opening of the sheath tube. The handle portion is held outside the opening, A filler is filled between the plate-like portion and the opening. After filling with the aforementioned filler, the male threaded portion is removed from the screw hole by rotating the handle portion. Remove the aforementioned handle portion, Fill the holes that have formed in the aforementioned filler. Piping installation methods.

2. The aforementioned filler is clay-like, The filler is introduced into the sheath tube through the opening. Using a pressing tool inserted through the aforementioned opening, the filler is pushed toward the plate-shaped portion. The construction method according to claim 1.

3. Multiple of the aforementioned laying pipes are inserted into the sheath pipe. The construction method according to claim 1 or claim 2.

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