JP3301936B2 - Non-cutting restoration method of service pipe at renewal of underground sewer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for renewing an old sewer such as an aged sewerage sewer without excavating the service pipe connected to the existing sewer simultaneously without excavating.
The present invention relates to a method of restoring service pipes without excavation at the time of rehabilitation of an underground culvert rehabilitated.

[0002]

2. Description of the Related Art In recent years, particularly in urban areas, maintenance of lifelines has been progressing, including a sewerage business. However, on the other hand, the deterioration of the sewers laid in the past and the lack of sewer capacity are becoming a problem, and replacement of the sewers is desired.

[0003] When replacing the laying, it is easiest and cheapest to lay a new culvert one size larger by an open-cutting method while keeping the existing culvert and keeping the route different. However, in urban areas, it is difficult to secure land for laying new sewers, and there are problems of securing road traffic and problems of underground buried objects that are complicated in the underground space. However, it is becoming increasingly difficult to secure routes for new sewers.

[0004] While solving such problems at once, a method of laying a new sewer was considered as a refresh shield method, a pipe bursting method, a pipe eating method, and the like. Is a method of renewing the sewer. According to this method, the existing sewer is cut and crushed by an excavator, etc., and the new sewer is made to follow from the rear. A new size sewer will be laid.

[0005] The refresh shield method is shown in FIG.
As shown in the figure, the existing sewer 54 and the surrounding ground are excavated and removed by a shield excavator 50 having a cutter head 51 provided with an opening in the center and a direction control support device (guide device) 52 provided in a hollow portion thereof. Meanwhile, a new sewer 53 is laid behind the shield machine 50.
In this case, the excavating power of the shield excavator 50 is equal to the newly installed sewer 53.
Is provided through a newly installed sewer 53 by a main push jack (not shown) placed at the base end (vertical shaft). In addition, by flowing downflow water such as sewage through a pipe provided through the center of the cutter head 51, it is possible to perform hot-line construction while using the current culvert. Excavation waste is carried outside the mine through the belt conveyor 55 and the like.

The pipe bursting method is a method of forcibly expanding an old pipe from inside to create a space and inserting a renewal pipe into the space. The pipe eating method involves crushing the old pipe. This is a method in which the pipe is taken inside the excavator while the renewal pipe is inserted into the cavity behind the excavator.

[0007]

However, in the pipe renewal method by the above-mentioned non-cutting excavation, when excavating and removing the existing pipe, the connection end of the service pipe connected to the existing pipe is irregularly damaged. After that, there is a problem that the connection to the newly installed sewer is not good, or there is a problem that not only the connection part to the main sewer is broken but also a crack occurs along the longitudinal direction of the pipe. At present, service pipes are replaced by digging work even if pipes are updated without cutting. Even if the main pipe is renewed without excavation, the excavation would have to be performed for each of a number of connected service pipes. This has led to a lack of demand despite the many proposed methods of rehabilitating sewers by non-drilling. In addition, due to the excavation work for replacing the service pipe, road traffic regulations are required, and there are also problems in the surrounding environment such as construction noise.

Accordingly, a main problem of the present invention is that when an existing sewer such as an aged sewer is renewed without excavation, the service pipe connected to the existing sewer is simultaneously restored and rehabilitated without excavation. It is an object of the present invention to provide a method for restoring service pipes at the time of renewing a buried pipe.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a method for restoring a service pipe to a non-opening service pipe, which is applied when an existing sewer buried underground is renewed without cutting. In the connecting part of the service pipe to the existing sewer, the service pipe is filled with a solid cuttable filler at least at the time of renewal of the existing sewer and the service pipe around the connecting part is filled. After the ground improvement, the existing sewer is updated by uncutting,
Then, new設管culvert after forming a hole communicating with the service pipe to the inner wall of integrating the new sewer and service pipe performs lining over astride range at least the new sewer and service pipe It is characterized in that

In this case, in order to minimize the damage of the service pipe at the time of renewal of the existing sewer, before renewing the existing sewer by non-cutting, a portion of the service pipe near the existing sewer is renewed. It is desirable to form a cutting joint by cutting.

In filling the filling material into the service pipe, it is preferable to install a water stoppager at a connection portion between the service pipe and the existing sewer in order to limit a filling range. As the filler, for example, a foamed resin such as styrene foam or styrene foam, or a self-hardening material such as mortar, concrete, or a ground improvement material can be suitably used.

In the present invention, when renewing an existing sewer, the filling material is filled into a service pipe, and the ground around the service pipe near the connection portion is improved. Therefore, the service pipe can be substantially prevented from being damaged when the existing pipe is renewed, and the crushed surfaces can be made clean.

On the other hand, in forming a hole communicating with the service pipe in the inner wall of the new pipe, in order to improve the drilling position accuracy, the connection point of the service pipe is formed after marking the connection point of the service pipe. It is desirable to do so. As a specific first method of marking, a method of drilling and marking the connection point between the service pipe and the newly installed culvert by a drill or an ultra-high pressure water injection device inserted from the service pipe side can be cited. In the second method, a high-frequency transmitter is inserted from the service pipe side, and a high-frequency wave transmitted from the high-frequency transmitter is detected by a high-frequency receiver on the new pipe side, so that the service pipe and the new pipe are detected. And a method of marking a connection point with the Further, as a third method, a magnet is inserted from the service pipe side, and the magnetism from the magnet is detected by a magnetic sensor on the newly installed culvert side.
Alternatively, a method of marking a connection point between the service pipe and the new pipe by attaching metal powder to the inner wall of the new pipe by the magnetic force of the magnet can be cited.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, an example of a culvert structure in which a service pipe 2 is connected to an existing culvert 1 from a residential land basin 3 to the existing culvert 1 will be described in accordance with the method of the present invention. It will be described in detail while stepping. << First Step >> First, as shown in FIG. 1, the existing pipe 1 and the service pipe 2 are connected to each other so that the filler 8 to be filled into the service pipe 2 in the second step does not enter the existing pipe 1. Communication part 1
a is closed with a waterproof packer 4 such as an air packer or a rubber packer.

<< Second Step >> In order to prevent the crushing of the existing sewer 1 from affecting the service pipe 2 and cracking the service pipe 2 when the existing sewer 1 is crushed, and to provide a service after the existing sewer 1 is renewed. As shown in FIG. 2, the service pipe 2 is cut at a position near the existing pipe 1 connection portion to form a cutting joint 5 so that the pipe 2 can be easily recovered. As shown in the drawing, for example, as shown in the drawing, an inner cutter provided with a cutter disk 6 at the tip of a flexible shaft 7 is brought in, inserted into the service pipe 2 from the residential yard 3, and connected to the existing pipe 1 of the service pipe 2. Cut off the position near the part. Or by using a cutting apparatus such as a pile cutter instead of the inner cutters device. The second step can be omitted in some cases.

<< Third Step >> Next, in order to prevent the service pipe 2 from being damaged when the existing sewer 1 is renewed, and to inject groundwater from a damaged part or a connection part of the service pipe 2, a fourth step will be described later. As shown in FIG. 3, in order to prevent the ground improvement material from entering the service pipe 2 when the ground improvement around the service pipe 2 is performed, as shown in FIG. And fillers 8 such as foamed resin such as styrofoam and styrene foam, and self-hardening materials such as mortar, concrete, and ground improvement materials.
Fill. Note that the filling is performed from the side of the residential land yard 3.

<< Fourth Step >> Furthermore, when the existing sewer 1 is renewed, the service pipe 2 is prevented from being damaged, groundwater intrusion from around the service pipe 2 is prevented, and ground collapse near the service pipe 2 is prevented. For the purpose, as shown in FIG.
Improvement of the ground around the connection site for
Create Although not limited in any way as a ground improvement method, it is of course possible to use a method and soil improvement material that suits the earth board properties, less impact on the environment because there is often a private house or the like in adjacent positions method and Soil Improvement materials are selected.

<< Fifth Step >> At the stage where the pre-processing for the service pipe 2 is completed,
Renew old dike 1 An existing digging device used for updating the existing sewer 1 can be used as it is. In addition, one of the present applicants disclosed in Japanese Patent Application No. Hei 7-244372 that the structure is simple, the excavation efficiency is excellent, and the reduction of excavation resistance makes it easy to lay a sewer even over long distances. In addition, since a digging device capable of digging regardless of the type of foreign matter existing around the existing sewer is proposed, this device can be suitably used.

As shown in FIG. 5, the new culvert 10 is laid in a substantially coaxial position of the existing culvert 1 with a size one size larger (or the same diameter size).

<< Sixth Step >> After the update to the new culvert 10 is completed, the operation for restoring the connection between the new culvert 10 and the service pipe 2 is started. Specifically, first, the work for forming a communication hole to the service pipe 2 with respect to the inner wall of the newly constructed new sewer 10 is started. To open the communication hole, first, the service pipe is required. It is necessary to clarify the connection position of 2, and as a method therefor, any of the methods shown in FIGS. 6 to 8 is suitably adopted.

First, a first method shown in FIG. 6 is a method for performing drilling marking using a drill 11, and includes a drive unit 11A, a flexible hose 11B having a rotating shaft therein, and a flexible hose 11B. At the front end, a drill 11 consisting of a cutter 11C attached to the rotary shaft is brought in, a flexible hose 11B is inserted into the service pipe 2 from the ground side housing yard 3 side from the front side, and the filling material 8 is drilled. A small hole is formed by drilling the side wall of the new pipe 10 to clarify the service pipe connection position. Instead of the drill 11 of the structure or by using a drill or the like fitted with a tip <br/> cutters concrete vibrator and engine type drainage pump.

Next, a second method shown in FIG. 7 is a method for performing drilling marking using ultra-high pressure water, and includes a drive unit 12A, a high pressure hose 12B, and a jet nozzle attached to the tip of the high pressure hose 12B. 12C and bring an extra-high pressure water injection system 1 2 consisting of a high pressure hose 12B is inserted from the front end side from a ground residential square 3 side to the service pipe 2, while drilling a filler 8, the side walls of the new sewer 10 A small hole is formed by drilling the hole to clarify the service pipe connection position. At this time, an abrasive such as silica sand, fused alumina, silicon carbide or the like can be mixed into the jet water in order to increase the cutting efficiency by the ultra-high pressure water.

Next, a third method shown in FIG. 8 is to insert a high-frequency transmitter into the service pipe 2 and search for a high-frequency signal transmitted from the high-frequency transmitter in the new sewer 10 to determine the position. It is a way to specify. Although the exploration can be performed even when the filling material 8 is packed in the service pipe 2, it is preferable to remove the filling material 8 to improve the search accuracy. I do.

In the removing operation, the one in which the cutter attachment of the drill 11 used in the first method shown in FIG. 6 is replaced with a disk cutter is inserted into the service pipe 2 to crush the filler 8, The crushed filler 8 may be removed by suction by inserting a vacuum suction machine. However, when the filler 8 is a foamed resin such as styrene foam, the volume may be reduced by using a solvent. For example, a volume reducing agent mainly composed of d-limonene generated from citrus bark is sprayed onto the filler 8 from the housing yard 3 to reduce the volume of the styrene foam and the like.

As shown in FIG. 8, a specific search method includes a high-frequency unit 14A and a high-frequency
a high-frequency oscillator 14 comprising a cable 14B having a
While the high-frequency transmitter 14a is inserted into the service pipe 2, the in-pipe traveling robot 15 equipped with the high-frequency receiver 15a is driven in the newly installed sewer 10, and the high frequency transmitted from the high-frequency transmitter 14a is reduced. A search is performed to specify the connection position of the service pipe 2. When the inner diameter of the new sewer 10 is about 800 mm or more, a worker with a high-frequency receiver enters the new sewer 10 and the service pipe connection position may be specified by direct measurement. it can.

Next, a fourth method shown in FIG. 9 is a method of clarifying the connection position of the service pipe 2 using a magnet and a magnetic sensor or iron powder. First, after removing the filler material 8 filled in the service pipe 2 by the above-described method, as shown in the figure, the magnet 16 is inserted into the service pipe 2 and localized at the newly installed sewer 10 site. The service pipe connection position may be clarified by a worker entering the new sewer 10 and directly measuring using a magnetic sensor, or using metal powder 17 such as iron powder. Then, the position where the iron powder is attached
May be specified as the connection position. When the pipe diameter is small, it is also possible to use a robot running inside the pipe to perform exploration by a magnetic sensor and work to attach iron powder.

<< Seventh Step >> When the connection portion of the service pipe 2 is specified by the above sixth step, a communication hole for the service pipe 2 is opened in the newly installed sewer 10. Inner diameter of newly constructed sewer 10 is about 800
If it is not less than mm, the worker can directly enter the pipe and drill and bore the pipe wall using a hammer drill or the like by human power, but the inner diameter is about 800 mm
In the following cases, since it is difficult for the worker to enter, as shown in FIG.
Using the in-pipe TV camera 19, the marking position specified in the sixth step is drilled, and the service pipe 2
Is formed.

<< Eighth Step >> If the newly installed sewer 10 and the service pipe 2 can be communicated by the seventh step, finally, the area between the newly installed sewer 10 and the service pipe 2 is extended. A lining material is applied to integrate the two. As a specific method,
So-called ICP (Inversion Chemical Pipe) liner &
A known method called a brease method can be suitably adopted. In this method, a pipe-shaped bag (hereinafter, referred to as a film-shaped lining material) is manufactured from a laminate of a non-woven fabric impregnated with a thermosetting resin and a plastic film, and is inverted and inserted into a pipe by fluid pressure. Then, heat is applied to cure the thermosetting resin impregnated in the nonwoven fabric to form a lining body in close contact with the inner wall surface, and FIG. 11 shows the operation procedure. Secure the certain the film-like lining material 20 collar 20a on the connection of the new sewer 10 and the service pipe 2 is folded into the pressure back 21
In this state, pressure is applied by air supply or water injection, and the service pipe 2 is inserted while being inverted. These series of operations are monitored by the in-pipe traveling camera 22. If the film-like lining material 20 has been fully reversed insertion to cure the film-like lining material 20 by injecting warm water, the cured pressure back 21 after completion of curing Phil
The peeling tube 23 connected to the rubber-like lining material 20 is cut off to complete the lining operation.

[0029]

As described above in detail, according to the present invention, when updating an existing sewer such as an aged sewer sewer without excavation, the service pipe connected to the existing sewer is simultaneously excavated. Can be restored and rehabilitated.

[Brief description of the drawings]

FIG. 1 is a first step construction procedure diagram of the service pipe restoration method.

FIG. 2 is a second step construction procedure diagram of the service pipe restoration method.

FIG. 3 is a third step construction procedure diagram of the service pipe restoration method.

FIG. 4 is a fourth step construction procedure diagram of the service pipe restoration method.

FIG. 5 is a fifth step construction procedure diagram of the service pipe restoration method.

FIG. 6 is a diagram illustrating a marking procedure in a sixth step of the service pipe restoration method.

FIG. 7 is another marking procedure in the sixth step of the service pipe restoration method.

FIG. 8 is another marking procedure in the sixth step of the service pipe restoration method.

FIG. 9 is another marking procedure in the sixth step of the service pipe restoration method.

FIG. 10 is a seventh step construction procedure diagram of the service pipe restoration method.

FIG. 11 is an eighth step construction procedure diagram of the service pipe restoration method.

FIG. 12 is a diagram showing a procedure for updating a sewer by a conventional excavator.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Existing sewer, 2 ... Service pipe, 3 ... Residential area measure, 4 ... Water stop packer, 5 ... Cutting joint, 6 ... Cutter disk, 7 ...
Flexible shaft, 8: Filler, 9: Ground improvement,
10 ... new sewer, 11 ... drill, 12 ... ultra high pressure water injection device, 14 ... high frequency transmitter, 15 ... in-pipe traveling robot, 1
6 ... magnet, 17 ... metal powder, 18 ... in-pipe work robot,
19: TV camera inside the tube, 20: Film lining material

──────────────────────────────────────────────────続 き Continued on the front page (73) Patent holder 000207621 Dainippon Civil Engineering Co., Ltd. 1-6-8 Usaminami, Gifu-shi, Gifu (73) Patent holder 390028015 Jizaki Kogyo Co., Ltd. 2-chome Nishishinbashi, Minato-ku, Tokyo 23-1 (73) Patent Holder 597024773 Chunichi Copro, Ltd. 26-4 Imaike Minami, Chigusa-ku, Nagoya-shi, Aichi (73) Patent Holder 000219406 Toa Construction Industry Co., Ltd. Yonbancho, Chiyoda-ku, Tokyo 5 (73 Patent holder 000222668 Toyo Construction Co., Ltd. 4-1-1 Koraibashi, Chuo-ku, Osaka-shi, Osaka (73) Patent holder 390036504 Nittoku Construction Co., Ltd. 8--14-14 Ginza, Chuo-ku, Tokyo (73) Patent right 395022018 Japan Offshore Drilling Co., Ltd. 3--20-16 Nishiazabu, Minato-ku, Tokyo (73) Patentee 000176785 Mitsubishi Construction Corporation 3-3-1 Nihonbashi Honcho, Chuo-ku, Tokyo (72) Inventor Shohei Senda 3-5-10 Matsuba, Ryugasaki-shi, Ibaraki Prefecture (72) Inventor Sumio Masakazu 3-1-2-5 Ariake, Koto-ku, Tokyo Omotogumi Co., Ltd. (72) Inventor Teruo Ariga Kanagawa 4036-1 Nakatsu, Aikawa-cho, Aiko-gun, Aichi Prefecture Inside Kokudo Koki Co., Ltd. (72) Inventor Yasuhiro Yokoshima 31-27 Daikancho, Hiratsuka-shi, Kanagawa Prefecture Shonan Plastics Manufacturing Co., Ltd. (72) Inventor Takafumi Sugiura Tokyo 2-35, Yatacho, Shinjuku-ku, Tokyo Large Japan Civil Engineering Co., Ltd. (72) Inventor Toshiaki 2-2-13-1 Nishishinbashi, Minato-ku, Tokyo Inside Chisaki Kogyo Co., Ltd. (72) Inventor Ikuo Hiramitsu Nagoya, Aichi Prefecture 26-4 Imaike Minami, Chikusa-ku, Japan Chunichi Cleaner Industry Co., Ltd. (72) Inventor Takao Murakami 5 Toban Construction Industry Co., Ltd., 5th Yonbancho, Chiyoda-ku, Tokyo (72) Inventor Yoshiya Fujio Central Osaka, Osaka 4-1-1 Koraibashi-ku, Toyo Construction Co., Ltd. (72) Inventor Toshimi Nakajima 8-14-1, Ginza, Chuo-ku, Tokyo No. 4 Inside Nittoku Construction Co., Ltd. (72) Inventor Koichi Hayashi 3-20-16 Nishiazabu, Minato-ku, Tokyo Japan Offshore Drilling Co., Ltd. (72) Inventor Isamu Takahashi 3-chome, Nihonbashi Honcho, Chuo-ku, Tokyo No. 6 Inside Mitsubishi Construction Co., Ltd. (56) References JP-A-4-78392 (JP, A) JP-A-5-26374 (JP, A) JP-A-7-310857 (JP, A) JP-A-3- 176524 (JP, A) JP-A-1-240207 (JP, A) JP-A-6-35782 (JP, U) JP-A-57-46189 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16L 1/024

Claims (7)

(57) [Claims] 1. A method for restoring a service pipe which is buried underground and renewing an existing pipe without cutting the pipe, wherein at a connection portion of the service pipe to the existing pipe,
The service pipe is filled with a cuttable filler in a solid state at least at the time of renewal of the existing pipe, and after improving the ground around the service pipe near the connection site, the existing pipe is not cut. update, then the new設管culvert after forming a hole communicating with the service pipe to the inner wall of, new sewer and service pipe performs lining over astride range at least the new sewer and service pipe A method of restoring service pipes at the time of renewal of underground sewers, which is characterized by integrating 2. A service at the time of renewal of a buried underground sewer according to claim 1, wherein when filling the filling material into the service pipe, a water stop packer is installed at a connection portion between the service pipe and an existing sewer. Non-cutting recovery method for pipes. 3. The service pipe according to claim 1, wherein said filler is a self-hardening material such as foamed resin such as styrene foam or styrene foam, mortar, concrete, and ground improvement material. Non-digging recovery method. 4. The underground pipe according to claim 1, wherein a cutting joint is formed in a portion of the service pipe near the existing pipe before the existing pipe is renewed by digging. Non-cutting restoration method of service pipe at the time of culvert renewal. 5. When forming a hole communicating with the service pipe on the inner wall of the new pipe, the service pipe and the new high-pressure water injection device are inserted between the service pipe and the high-pressure water injection device in advance. 5. The method according to claim 1, wherein the connection point is marked by drilling. 6. A high-frequency transmitter is inserted in advance from the service pipe side to form a hole communicating with the service pipe in the inner wall of the new pipe, and a signal is transmitted from the high-frequency transmitter on the new pipe side. The non-cutting of the service pipe at the time of underground burial renewal according to any one of claims 1 to 4, wherein the connection point between the service pipe and the newly installed culvert is marked by detecting a high frequency to be received by a high frequency receiver. Recovery method. 7. A magnet is inserted from the service pipe side to form a hole communicating with the service pipe in the inner wall of the new pipe, and the magnetism from the magnet is detected on the new pipe side. 5. A connection point between the service pipe and the new pipe is marked by detecting by means of a metal powder or by attaching metal powder to the inner wall of the new pipe by the magnetic force of the magnet. Method of service pipe non-excavation restoration at the time of renewal of underground sewer in Japan.