JPS61126223A - Method for repairing and reproducing underground buried piping - Google Patents

Abstract

PURPOSE:To repair and reproduce an existing buried pipe from the interior as it is, by a method wherein a cage type frame is arranged in the existing buried pipe, a segment is secured to the frame to form an inner pipe, and a space between the inner pipe and the buried pipe is filled with a filler for solidifying. CONSTITUTION:A cage type frame 5 is inserted into an existing buried pipe 1. Segments 8 made of synthetic resin, each formed in an arc of a circle in cross section and having the same length as that of a distance between ring seams 6 of the frame 5, are conveyed into the frame 5. The segment 8 is engaged with the ring seam 6 and a side seam 12 to form an inner pipe 14. A filler 15, such as mortar, FRP, is poured in a space between the inner pipe 14 and the existing buried pipe 1 for solidifying to secure together the inner pipe 14 and the existing buried pipe 1. This enables the existing buried pipe to be repaired for reclaimation as it is.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for repairing and regenerating underground pipes such as water supply and sewerage pipes and gas pipes, and particularly to underground pipes that can be repaired while the pipes are buried. The present invention relates to a method for repairing and reproducing.

When existing pipes become obsolete due to corrosion, etc., the ground is dug up for repair, the old pipes are removed, new pipes are connected, and the pipes are backfilled.

[Problems to be solved by the invention] However, this repair work poses few problems when the diameter of the pipe is small, but as the diameter of the pipe becomes larger, the depth of excavation becomes deeper, the construction period becomes longer, and it becomes a hindrance to traffic. This is undesirable, and the work tends to be expensive.

[Object of the Invention] The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a method for repairing and regenerating underground pipes that can repair aging pipes while the pipes remain buried. do.

[Summary of the Invention] In order to achieve the above-mentioned object, the present invention provides an inner pipe which has been reduced in diameter to form a predetermined gap on the inner wall of the pipe, in an aged pipe buried underground. It is formed by segments divided in the circumferential direction and the longitudinal direction, and after carrying these segments into the piping and connecting the segments in the circumferential direction and the longitudinal direction to assemble the inner pipe, the inner pipe and the piping are connected to each other. This method is characterized by filling the gap with a filler such as mortar. For example, a manhole in an underground pipe is used, and the segments are carried into the underground pipe through the manhole, and the segments are connected within the pipe to form the inner pipe. By forming a pipe and filling a filler such as FRP or mortar between the inner pipe and the pipe, the inner pipe can be used as a newly installed pipe.

[Embodiment] A preferred embodiment of the method for repairing and regenerating underground piping according to the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a buried pipe buried underground 2, consisting of, for example, a main pipe of water, sewerage, gas, etc., and manholes 3 are provided as appropriate. This existing buried piping 1
For example, it is assumed that the pipe is made of concrete pipes or steel pipes, and is old and has cracks 4 as shown in the figure.

First, a cage-shaped frame 5 is inserted into the buried pipe 1 as shown in FIG. The frame 5 is composed of an annular ring seam 6 having an opening-shaped cross section and a side seam 7 having an opening-shaped cross section connecting the ring seams 6. This cage-shaped frame 5 is inserted into the buried pipe 1 from the manhole 3 side at an appropriate length, and connected and assembled in sequence within the buried pipe 1. After inserting and assembling this frame 5, a spacer (not shown) is used to separate the inner wall of the buried pipe 1 and a predetermined gap.
etc. will be maintained.

Next, a segment 8 made of synthetic resin or the like having an arcuate cross section and the same length as the interval between the ring seams 6 of the frame 5 is carried into this frame 5, and the front and rear 7 flange portions 9 at the front and rear ends of the segment 8 are introduced.り″'j＞-A6O@11 o
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Connect the side flange portions 11 on both sides of the mount 8 to the side seam 7.
Fit it into the groove 12 of.

As shown in FIG. 5, after fitting the side flanges 11 of the segments 8 in the circumferential direction into the ring seam 6, a synthetic material such as epoxy resin is applied to the side flanges 11 and the grooves 12 of the side seams 7. The resin 13 is filled and cured. Furthermore, the front and rear ends of the segment 8 are also connected to the front and rear flange portions 9, as shown in FIG. The synthetic resin 13 is filled into the groove 10 of the J and ring seam 6 and then cured.

In addition, if there is a bent part 1a in the buried pipe 1 as shown in Fig. 2, the cage-shaped frame 5a is bent and assembled according to the curvature of the bent part 1a, and the segments 8a to be blown into the frame 5a are also shaped accordingly. Form according to the curvature.

As described above, the frames 5 are sequentially joined and assembled at the locations where the buried piping 1 should be supplemented, and the segments 8 are fitted from within the frames 5 to fit the synthetic resin 111.
3, a filler 15 made of mortar or synthetic resin such as FRP is injected into the gap between the inner pipe 14 formed by the segments 8 and the buried pipe 1, and the buried pipe 1 is
The inner tube 14 is fixed therein.

In this case, as shown in FIG. 5, a nozzle hole 16 for injecting the filler 15 is provided in the ring seam 6 of the cage-shaped frame 5 as shown in FIG. Inject 15.

In this way, an inner pipe 14 consisting of segments 8 can be integrally formed within the buried pipe 1, as shown in FIG.
4 can be used as a new gas or water/sewerage passage 17. In this case, the cross-sectional area of the passage 17 becomes smaller, but the inner surface of the segment 8 or the entire segment 8 is made of FRP or the like with a fluid 1211' (a material with a small coefficient) so as not to increase the pressure loss.

Moreover, FIGS. 8 and 9 show other embodiments of joining the segments 8, and when joining both ends of the segment 8 divided into three in the circumferential direction as shown in FIG. A collar 18 is provided that extends in the axial direction along the segment 8, and a book screw 19 is screwed into the collar 18 from the inner periphery of the segment 8 to fix the segment 8 in the circumferential direction, as shown in FIG. Good too. In addition, to connect the segment 8 in the longitudinal direction, similarly form the collar into a ring shape and fix it with the 1 screw.

In this example, the inner tube 14 can be formed without using the cage-shaped frame shown in FIGS. 1-7.

FIG. 10 shows still another example of joining the segments 8, in which the circumferential ends 23 of the segments 8 are overlapped, a cap nut 20 is embedded in one end 23 in advance, and the other end 23 is The inner tube 14 is formed by screwing a countersunk screw 21 into the cap nut 20 and directly joining the segments 8 to each other. In this case, the segments 8 are also overlapped in the longitudinal direction and joined using cap nuts and countersunk screws.

FIG. 11 shows an inner pipe 14 installed at the bent part 1a of the buried pipe 1.
Example a is shown in which the segment 22 is formed into a short cylindrical tube shape as shown in the figure, and its front and rear ends are tapered so that they can be fitted into each other, and the short tube-shaped segment 22 is connected to the bent part of the buried pipe 1. The bent portion of the inner tube 14 may be formed by lining the inner peripheral surface of the segment 22 with a synthetic resin (not shown) such as FRP.

[Effects of the Invention] As is clear from the above detailed description, the present invention exhibits the following excellent effects.

(1) By forming an inner pipe consisting of segments divided in the circumferential direction and longitudinal direction inside the buried pipe, and filling the inner pipe and the buried pipe with a filler such as mortar or synthetic resin, The pipe can be used as new piping, and the buried piping can be repaired and regenerated while leaving it as it is.

(Using a remanhole, etc., the inner pipe is formed by passing segments through the buried pipe, so there is no need to dig up the ground above the pipe as in the past, and there is no need to interfere with traffic during construction.) Nor.

[Brief explanation of drawings]

Figure 1 is an overall sectional view showing the construction state of the repair and regeneration power of underground piping according to the present invention, and Figure 2 is a plan cross-sectional view of the construction state in the underground pipe according to the method of repairing and regenerating underground piping of the present invention. 3 is a partial perspective view of a cage-shaped frame according to the present invention 6, FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2, and FIG. 6 is a partial enlarged sectional view of part A in FIG. 2, FIG. 7 is a partial sectional view showing a nozzle for injecting a filler in the present invention, and FIG. 8 is a sectional view showing another embodiment of FIG. 4. , FIG. 9 is a partial enlarged cross-sectional view of FIG. 8, FIG. 10 is a cross-sectional view of a main part showing an example of the connection of segments in the present invention, and FIG. It is a front view of a segment showing an example. In the figure, 1 is a buried pipe, 8 is a segment, 14 is an inner pipe, 1
5 is a filler.

Claims (1)

[Claims] An inner pipe that has been reduced in diameter to form a predetermined gap on the inner wall of the pipe is formed into segments that are divided in the circumferential direction and the longitudinal direction in an aging pipe that is buried underground, and these segments are used to connect the pipe to the pipe. After the inner pipe is assembled by carrying the inner pipe into the inner pipe and connecting the segments in the circumferential direction and the longitudinal direction, the gap between the inner pipe and the pipe is filled with a filler such as mortar. A method for repairing and regenerating underground pipes.