JP2000025114A - Repairing method of existing tube culvert - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve repairing construction without using such as tap water or a portable water tank in a repairing method for an existing tube culverts such as a sewer or pipeline which deteriorate or become too old by long-time use or the like, in particular, in a repairing method where lining materials are arranged in horizontal tubes of the existing tube culvert and a fluid such as water is supplied in the inward space (S). SOLUTION: In the repairing method, sewage flowing in a horizontal tube 2 or the like is used as a fluid. In this case, it is preferable to maintain a predetermined pressure in a space (S), while the sewage or the like is subsequently supplied in the space (S) as well as discharged. As the means, for example, the sewage or the like is pressure-fed in the space (S) by a pump 12 or the like, and the sewage or the like supplied in the space (S) is discharged through a controller 15 for controlling the pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing existing sewers such as sewers and pipelines, and in particular, for repairing existing sewers that have deteriorated or deteriorated due to long-term use.

[0002]

2. Description of the Related Art Conventionally, as a method of repairing an existing sewer which has deteriorated or deteriorated as described above, a sheet-like lining material having flexibility is formed in advance into a tubular shape substantially equal to the inner diameter of the sewer. A method has been proposed in which the tubular lining material is crushed in the cross-sectional direction, pulled into the sewer, expanded and then restored and fixed in a tubular shape, and attached to the inner peripheral surface of the sewer for repair. (For example, Japanese Translation of International Patent Publication No. 7-509
No. 289).

FIGS. 3 to 5 show a state in which a horizontal pipe of a sewer pipe is repaired by the above-mentioned conventional repair method, for example, on the inner peripheral surface of a horizontal pipe 2 between adjacent manholes 1.1. An inner / outer double cylindrical lining material 3 composed of a preliner 31 and an inliner 32 and the like arranged at predetermined intervals in the inside and outside directions by a large number of projections 32a and the like is pushed in a sectional direction as shown in FIG. Pull in the crushed state. Then, the inflatable packers 4a and 4b are mounted inside the both ends of the lining material 3 as shown in FIG. 3 and expanded to seal the space S in the lining material 3. In this state, the shape of the lining material 3 is not yet fixed.

Therefore, a fluid such as water is supplied from the supply pipe 5 into the space S by a pump or the like (not shown), the pressure in the space S is detected by a manometer 6 or the like, and excess fluid is discharged. The space S is maintained at a constant pressure for a predetermined period of time by discharging from the pipe 7, and the lining material is expanded and restored to a cylindrical shape and fixed. In this state, a fixing material such as mortar is filled between the pre-liner 31 and the in-liner 32 and solidified as shown in FIG. 5B. At that time, the sewage flowing from the upstream side of the repair area,
As shown in FIG. 3, suction is performed sequentially by a pump 9 or the like through a bypass pipe 8 composed of a hose or the like, and discharged into a downstream manhole through the bypass pipe 8. Alternatively, as shown in FIG. 4, the horizontal pipe 2 between the manhole 1a upstream of the area to be repaired and the manhole 1b downstream is closed with a water stop packer 10 or the like, and the vacuum car V
And the like, the work of discharging the sewage pumped to the manhole 1b downstream and discharging it.

[0005]

By the way, the space S
If there is tap water near the site as a fluid for keeping the inside at a constant pressure, it is used, but a large amount of tap water is wasted for each construction area, which is uneconomical. However, since there is often no water supply near the site, in that case, for example, water must be stored in a portable water storage tank or the like and transported to the site, which is inefficient. .

[0006] In addition, temporary installation of the detour pipe 8 on the ground during the repair period may impede traffic on the road, or limit the amount of sewage discharged from surrounding dwelling units and facilities due to the limit of the amount of sewage transported by the vacuum car. This has the disadvantage of having a large effect on the surrounding environment.

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned conventional problems, and does not require tap water or a portable water storage tank, and minimizes the influence on the surrounding environment. The purpose of the present invention is to provide a method of repairing existing sewers that can be performed.

[0008]

In order to achieve the above object, a method for repairing an existing sewer according to the present invention is as follows.

That is, a flexible tubular lining material is crushed and disposed in a sectional direction in an existing sewer such as a sewer pipe,
In a method of repairing an existing culvert in which a fluid is filled into a space inside the lining material to restore and fix the lining material in a tubular shape along the inner surface of the existing culvert and perform repair work. It is characterized in that a fluid such as sewage flowing in the pipe is used as the fluid to be filled.

[0010]

[Function] As described above, a fluid such as sewage flowing in the horizontal pipe of the sewer is used as a fluid used for repairing the existing sewer, so that tap water or a portable water storage tank or the like is used. The above-mentioned repair work can be performed without the need. At this time, if the space is maintained at a predetermined pressure while simultaneously supplying and discharging a fluid such as sewage into the space, the lining process can be performed satisfactorily, and the existing sewer can be cleaned. Fluid such as flowing sewage can be circulated without interruption.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A method for repairing an existing sewer according to the present invention will be specifically described below by taking as an example a case where the method is applied to a repair work for a sewer sewer.

FIG. 1 shows an embodiment of the repair method according to the present invention, in which a horizontal pipe 2 between adjacent manholes 1 in a sewer pipe is repaired. In the horizontal pipe 2, a double inner / outer lining material 3 composed of a preliner 31 and an inliner 32 is arranged in a state of keeping a predetermined interval inward and outward by a large number of projections and the like as in the conventional example. . When the lining material 3 is drawn into the horizontal tube 2, the flexible tubular pre-liner 31 and the inliner 32 are cut in the cross-sectional direction so as to be smaller than the cross-section of the horizontal tube 2 as in the conventional example. In the state of being squashed in order
Pull in.

The spaces S in the lining material 3 are sealed by mounting and expanding the inflatable packers 4a and 4b inside the both ends of the lining material 3. Of the two packers 4a and 4b, the sewage flowing from the upstream side is supplied to the upstream packer 4b in the space S.
The supply pipe 11 to be supplied to the inside is inserted and held, and the supply pipe 1
A pump 12 is provided in the middle of 1. Reference numeral 13 denotes a weir for temporarily storing sewage flowing from the upstream side.

On the other hand, a discharge pipe 14 for discharging the sewage supplied into the space S to the downstream side is inserted into and held in the downstream packer 4 a, and is supplied and stored in the space S in the middle of the discharge pipe 14. A controller 15 such as a pressure regulating valve for controlling the discharge amount of the sewage so that the sewage reaches a predetermined pressure is provided.

In the above configuration, the pump 12 is driven to sequentially supply the sewage flowing from the upstream side into the space S through the supply pipe 11 under pressure, and the controller 1
5, the sewage in the space S is discharged to the downstream side through the discharge pipe 14 while adjusting the discharge amount, and a predetermined substantially constant pressure (in the present embodiment, about 1 kgf / c
m ² ), thereby inflating the lining material 3,
It is restored to a cylindrical shape and fixed to the inner surface of the horizontal tube 2 in close contact. In this state, the preliner 3 of the lining material 3
A fixing material such as mortar is filled between the first and inliner 32 and solidified.

As described above, the sewage flowing through the horizontal pipe 2 is used as a fluid used for repairing the existing sewer, ie, a fluid that fills the space S and restores and fixes the lining material 3 into a cylindrical shape. As a result, the repair work can be performed without using tap water or a portable water storage tank as in the conventional case. Further, since the inside of the space S is maintained at a predetermined pressure while sequentially supplying and discharging the sewage into the space S, the lining material 3 can be expanded at an optimum pressure, and the lining processing is improved. And the sewage can be circulated without interruption. In particular, in the above embodiment, the flow rate can be easily adjusted by the pump 12 and the controller 15.

Therefore, there is no need to temporarily install a pipeline for sewage sewage during the repair period on the ground surface or to transport the sewage by a vacuum car during the repair period, and to stop the circulation of the existing sewage system including the repair section. Since it can be used as it is, the influence on the surrounding environment can be minimized.

FIG. 2 shows another embodiment of the method for repairing an existing sewer according to the present invention. The method corresponds to the pressure at which the sewage flowing from the upstream side of the repair area should be applied to the lining material 3. The water is supplied into the space S via an injection tank 23 installed at a predetermined height, and the sewage supplied into the space S is drawn up to a predetermined height and then discharged.

In the present embodiment, the sewage dammed by the weir 13 is introduced into the injection tank 23 sequentially by the water supply pipe 21 and the pump 22. The sewage introduced into the injection tank 23 is supplied by It is supplied into the space S in the lining material 3 via the pipe 24. In the present embodiment, the sewage supplied into the space S is guided to a discharge tank 26 disposed at a position slightly lower than the water injection tank 23 via a discharge pipe 25, and the sewage overflowing from the tank 26 is discharged. It is configured to be discharged downstream of the repair area via the water pipe 27.

The above-mentioned injection tank 23 and discharge tank 26
Is installed at a height of about 10 m from the center of the horizontal tube 2 in the present embodiment, whereby the pressure in the space S is substantially constant (in the present embodiment, about 1 kgf / cm
² ). With the above configuration, FIG.
The same operation and effect as those of the embodiment can be obtained.

The method for supplying the fluid into the space S and the method for discharging the fluid from the space S in the embodiment shown in FIGS. 1 and 2 may be appropriately changed. For example, the method shown in FIG. Similarly, a fluid such as sewage is supplied under pressure by a pump 12 or the like, and the fluid supplied in the space S is pulled up to a predetermined height as shown in FIG. It is also possible to supply a fluid such as sewage through the injection tank 23 installed at a predetermined height, and to discharge the fluid from the space S via the pressure control controller 15.

In the above embodiment, the case where the horizontal pipe 2 of the existing sewer pipe is repaired has been described as an example.
The present invention can be applied not only to sewers but also to pipelines and other existing sewers.

[0023]

As described above, in the repair method according to the present invention, the flexible tubular lining material 3 is pulled into the existing sewer in a state of being crushed in the cross-sectional direction, and then restored and fixed in a tubular shape. As a fluid used for repairing the existing sewer, a fluid such as sewage flowing in the existing sewer is used, so the repair can be performed without using tap water or a portable water storage tank as in the conventional case. Work can be done. Further, since a predetermined pressure is maintained in the space S while sequentially supplying and discharging a fluid such as sewage to the space S in the lining material 3, the fluid such as sewage can be circulated without interruption. . Therefore, there is no need to temporarily provide a conduit on the ground surface for bypassing the fluid flowing through the existing sewer, or to transport the fluid with a vacuum car or the like, and the existing sewer including the repair section can be used together. This has the effect of minimizing the effect on the surrounding environment.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of a method for repairing an existing sewer according to the present invention.

FIG. 2 is an explanatory view showing another embodiment of a method for repairing an existing sewer according to the present invention.

FIG. 3 is an explanatory view showing a construction example of a conventional repair method for an existing sewer.

FIG. 4 is an explanatory view showing another example of a conventional method of repairing an existing sewer.

5 (a) and 5 (b) are cross-sectional views of a conventional horizontal pipe showing a repair procedure for an existing pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manhole 2 Horizontal pipe 3 Lining material 4a, 4b Waterproof packer 11, 24 Supply pipe 12, 22 Pump 13 Weir 14, 25 Discharge pipe 15 Controller 23 Injection tank 26 Discharge tank

Claims (3)

[Claims] 1. A flexible tubular lining material is crushed and disposed in a sectional direction in an existing sewer such as a sewer pipe, and a fluid is filled in a space inside the lining material. In the repair method of the existing culvert which performs the repair work by restoring and fixing the lining material into a tubular shape along the inner surface of the existing culvert,
A method for repairing an existing sewer, wherein a fluid such as sewage flowing in the sewer is used as a fluid to be filled in the space. 2. The existing sewer according to claim 1, wherein a fluid such as sewage is supplied under pressure by a pump or the like into the space, and the fluid supplied into the space is discharged through a pressure control controller. Repair method. 3. Supplying the fluid such as the sewage into the space via an injection tank installed at a predetermined height,
2. The method for repairing an existing sewer according to claim 1, wherein the fluid supplied into the space is raised to a predetermined height and then discharged.