JP3242267B2 - How to connect the pipe - 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 of connecting a water supply / discharge mud pipe arranged in a propulsion pipe for laying a pipe such as a water pipe, a gas pipe, an oil pipe or the like by a muddy water propulsion method.

[0002]

2. Description of the Related Art For example, when laying a gas pipe or the like underground,
The propulsion method is widely used from the viewpoint of construction pollution such as intersection with existing structures, proximity or traffic treatment, noise and vibration. In this propulsion method, the muddy water propulsion method is often used in accordance with the extension of the propulsion length. In the muddy water propulsion method, as shown in the cross-sectional view of FIG. 6, the earth and sand excavated by the excavator 1 is sent out from the muddy water pump 2 and taken into the muddy water transported through the flexible pipe 3a and the muddy pipe 4 and discharged. In this method, the muddy water is sent to a muddy water treatment facility 7 by a mudging pump 5 through a muddy pipe 6 and a flexible pipe 3b. In the muddy water treatment facility 7, the sent muddy water is subjected to a classification process to adjust the muddy water to a predetermined property and circulate again as muddy water.

In this muddy water propulsion method, as shown in a partial sectional view of FIG. 7, every time one cycle of propulsion is completed, a new pipe 8a is connected to the propelled existing pipe 8.
The starting pipe 9 separates the mud feeding pipe 4 and the mud discharging pipe 6 installed in the existing pipe 8 from the flexible pipes 3a and 3b, respectively.
Thereafter, the new pipe 8a is suspended from the starting shaft 9 and one end of the mud pipe 4a and the mud pipe 6a installed in the new pipe 8a is separated from the mud pipe 4 installed in the existing pipe 8 by the drain pipe 4a. The other end of the mud feeding pipe 4a and the other end of the mud discharging pipe 6a are connected to the flexible pipes 3a and 3b. Then, the new pipe 8a is joined to the existing pipe 8, and then the propulsion is performed again.

[0004]

SUMMARY OF THE INVENTION As described above,
Each time the cycle is completed, the sludge pipe 4 and the sludge pipe 6 installed in the existing pipe 8 at the starting shaft 9 are connected to the flexible pipe 3.
Since it is separated from the a and 3b, the muddy water and the muddy water in the mud feeding pipe 4 and the mud discharging pipe 6 are separated and flow out from the end into the starting shaft 9. Generally, the longer the propulsion distance, the larger the amount of muddy water and muddy water in the mud pipe 4 and the drainage pipe 6 becomes, and a large amount of muddy water and muddy water flows out in each cycle of propulsion. Not only that, the inside of the existing pipe 8 was not only soiled, but also sediment accumulated, and it was not easy to treat it. If there is spring water in the starting shaft 9, the spring water is discharged. However, the discharged water is mixed with a large amount of muddy water or muddy water, and the drainage channel is clogged, and the drainage cannot be performed smoothly. Would.

When laying a hume tube or the like,
The new pipe 8a is connected to the existing pipe 8 after connecting the mud pipe 4a and the drain pipe 6a installed in the new pipe 8a with the mud pipe 4 and the drain pipe 6 installed in the existing pipe 8. Although there is no particular problem, when the steel pipe is laid, the new pipe 8a is welded to the existing pipe 8 by joining the entire circumference of the new pipe 8a. The sludge pipe 4 and the sludge pipe 6 hinder the use of a centering jig for aligning the groove of the welded portion, and there is a risk of poor welding.
In addition, it is necessary to confirm the welding state by an X-ray transmission test or the like, but the images of the mud pipe 4 and the drain pipe 6 connected earlier appear on the X-ray transmission image and the like, and the inspection of the welded portion is performed accurately. The disadvantage was that it was difficult.

This disadvantage can be solved by connecting the new pipe 8a to the existing pipe 8 and then connecting the sludge pipe 4 and the sludge pipe 6 to the pipe.
In the case of a small-diameter pipe, since it is impossible to work inside the pipe, the new pipe 8a is joined to the existing pipe 8, and then the mud feed pipe 4, the mud pipe 6
It was difficult to connect.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned disadvantages. When connecting a new pipe to be propelled to an existing pipe, muddy water and muddy water flowing out of the sending / discharging pipe are reduced as much as possible and a small-diameter pipe is used. It is an object of the present invention to provide a method of connecting a feed / discharge pipe capable of reliably welding and joining even a propulsion pipe.

[0008]

SUMMARY OF THE INVENTION A method for connecting a mud pipe according to the present invention is a method for connecting a mud pipe arranged in a propelling pipe for transporting mud water and a mud pipe for transporting mud water with a flexible and compressive restoration performance. Is formed of a good synthetic resin pipe, the above-mentioned mud feed pipe and the drain pipe are wound in advance in a coil shape or spiral shape, and arranged behind the excavator. After compressing and crushing the pipe and mud pipe, the flexible pipe connected to the muddy water treatment facility was removed from the mud pipe and mud pipe, and the tips of the mud pipe and mud pipe were bent or folded and propelled. After being housed in the existing pipe, the existing pipe and the new pipe are joined, and after joining the existing pipe and the new pipe, pull out by the length corresponding to the length of the propulsion pipe that connects the mud pipe and the exhaust pipe. Restore the sludge pipe and the flue pipe that was bent or folded from the end of the sludge pipe and the sludge pipe. Respectively, characterized in that to release the squeezing of Okudoro pipe and the waste sludge pipe by connecting a flexible tube. It is preferable that the above-mentioned mud feeding pipe and drain pipe are formed of a medium density polyethylene pipe.

[0009]

According to the present invention, the mud feeding pipe and the mud discharging pipe which are arranged in the propulsion pipe and transport muddy water and muddy water are formed of a synthetic resin pipe which is flexible and has good compression / recovery performance. When this synthetic resin tube is formed of a medium density polyethylene tube, the medium density polyethylene tube is supplied in a coil shape at a small diameter of 50 A or less, and can crush the tube to shut off fluid in the tube. Therefore, a sludge pipe and a sludge pipe wound in advance in a coil or spiral form are arranged behind the excavator. When one cycle of propulsion is completed and the new pipe is connected to the propelled existing pipe, the mud pipe and the mud pipe are compressed and crushed in the existing pipe, and the muddy water in the mud pipe and the mud pipe is discharged. The mud water is shut off, and when the flexible pipe is removed from the mud pipe and the mud pipe, the mud water and the mud water in the mud pipe and the mud pipe are prevented from flowing out.

[0010] The muddy water and the muddy water in the mud pipe and the mud pipe are shut off, the flexible pipe connected to the muddy water and the muddy water treatment facility is removed, and then the mud pipe and the mud pipe are bent and the existing pipe is bent. Then, the existing pipe and the new pipe are joined. When joining the existing pipe and the new pipe, the existing pipe and the new pipe have no mud feed pipe and no drain pipe, so that the existing pipe and the new pipe can be joined by welding.

After joining the existing pipe and the new pipe, the mud pipe is drawn out by a length corresponding to the length of the new pipe connecting the mud pipe and the mud pipe wound in a coil or spiral shape and bent. The pipes and mud pipes will be restored and the mud pipes and mud pipes will be placed in the new pipe. Flexible pipes are respectively connected to the ends of the mud pipe and the mud pipe to release the crushing of the mud pipe and the mud pipe, and then the propulsion starts again.

[0012]

FIG. 1 is a sectional view showing a muddy water propulsion method according to an embodiment of the present invention. A mud pipe 4 for transporting mud water to the excavator 1 and a mud pipe 6 for transporting mud water taking in the earth and sand excavated by the excavator 1 are, for example, medium-density polyethylene pipes used for gas burying pipes. I have. This medium-density polyethylene tube is flexible and has good compression-recovery performance, and is supplied by being wound in a coil shape at a small diameter of 50 A or less. Therefore, the sludge pipe 4 wound on the drum 10 and the sludge pipe 6 wound on the drum 11 are arranged behind the excavator 1 in advance.
One end of the sludge pipe 4 wound around the drum 10 and one end of the sludge pipe 6 wound around the drum 11 are connected to the excavator 1. And every time the new pipe is connected to the existing pipe 8,
The sludge pipe 4 and the sludge pipe 6 wound around the drums 10 and 11 are drawn out by a predetermined length and arranged in the new pipe.

One cycle of propulsion is completed by this muddy water propulsion method, and the flexible pipes 3a, 3a, connected to the muddy water treatment facility 7 from the mud feed pipe 4 and the drainage pipe 6 to connect a new pipe to the existing pipe 8 The operation of removing 3b will be described with reference to the removal process diagram of FIG. In FIG. 2, only one of the mud pipe 4 and the mud pipe 6 is shown for simplification of the drawing.

First, as shown in FIG. 2 (a), the mud feed pipe 4 and the mud discharge pipe 6 are placed in the starting shaft 9 at a position within the existing pipe 8 at a predetermined distance from the end of the existing pipe 8. The pressurizing and compressing device 12 is arranged. The pressurizing / compressing device 12 has a pair of presser rods 13 that move by hydraulic pressure or pneumatic pressure. 4 and the drainage pipe 6 are locally pressurized and compressed. Then, after the driving of the water pump 2 and the driving of the mud pump 5 of the muddy water treatment facility 7 are stopped, hydraulic or pneumatic pressure is supplied to the pressurizing and compressing device 12, and the mud feeding pipe 4 is pressurized by the pair of holding rods 13. Compress. When the mud pipe 4 is pressurized and compressed, the mud pipe 4 is formed of a medium-density polyethylene pipe having good compression / restoring performance, and is crushed as shown in the partial sectional view of FIG. The muddy water filling the mud pipe 4 from 12 to the excavator 1 is shut off. Similarly, the drainage pipe 6 is pressurized and compressed by the presser rod 13 of the pressurizing and compression device 12, and the drainage water filling the drainage pipe 6 from the pressurizing and compression device 12 to the excavator 1 is shut off. In this state, as shown in FIG.
3b is removed from the sludge pipe 4 and the sludge pipe 6, respectively. In this manner, the flexible pipes 3a, 3a
Even if b is removed, since the muddy water and the muddy water in most of the pipes of the mud pipe 4 and the mud pipe 6 are shut off, the mud flows out of the pipe ends of the mud pipe 4 and the mud pipe 6. The amount of mud and waste water can be greatly reduced.

Next, a process of connecting the existing pipe 8 and the new pipe 8a when using the steel pipe as the propulsion pipe after removing the flexible pipes 3a and 3b from the mud pipe 4 and the drain pipe 6 is shown in FIG. This will be described with reference to a connection process diagram. When a hume pipe or the like is used as the propulsion pipe, the existing pipe and the new pipe may be connected immediately after removing the flexible pipes 3a and 3b from the mud feed pipe 4 and the drain pipe 6.

When a steel pipe is used as the propulsion pipe, FIG.
As shown in FIG. 4A, the flexible pipes 3a and 3b are removed from the mud feed pipe 4 and the drain pipe 6 and then a bending mechanism 14 having a drum in the existing pipe 8 as shown in FIG. Is inserted, and the bending mechanism 14 is advanced into the existing pipe 8 while bending the end of the mud pipe 4 into a U-shape by the bending mechanism 14, and the bending position of the mud pipe 4 is moved into the existing pipe 8. I do.
By moving the bending position of the mud pipe 4 into the existing pipe 8, the connection between the existing pipe 8 and the new pipe 8 a causes the mud pipe 4 to move.
Can be removed. Also, the sludge pipe 6 is bent in the same manner and removed from the end of the existing pipe 8. When the sludge pipe 4 and the sludge pipe 6 are bent in this way, since the sludge pipe 4 and the sludge pipe 6 are formed of a flexible and flexible medium-density polyethylene pipe, they can be easily bent. it can.

The sludge pipe 4 and the sludge pipe 6 are bent to form an existing pipe 8.
After removing the new pipe 8a, the new pipe 8a is suspended and welded to the existing pipe 8 as shown in FIG. As described above, when the connection between the existing pipe 8 and the new pipe 8a is welded, since the sludge pipe 4 and the sludge pipe 6 are not located at the welding positions, the groove can be reliably set, and the like. A welded joint can be obtained, and an inspection of a welded portion by an X-ray transmission test or the like can be accurately performed.

When the welding of the existing pipe 8 and the new pipe 8a is completed, the slender pipe 4 and the drain pipe 6 are moved by the length of the new pipe 8a while moving the bending mechanism 14 toward the end of the new pipe 8a. The drawn and bent sludge pipe 4 and sludge pipe 6 are restored and straightened, and the sludge pipe 4 and sludge pipe 6 are arranged in the new pipe 8a.
When arranging the sludge pipe 4 and the sludge pipe 6 in the new pipe 8a, the sludge pipe 4 and the sludge pipe 6 are connected to the drums 10 and 1
Since it is wound around one, it can be easily pulled out and arranged, and the step of connecting the sludge pipe 4 and the sludge pipe 6 every time one cycle of propulsion can be omitted. Also, when the mud pipe 4 and the mud pipe 6 are restored, the mud pipe 4 and the mud pipe 6 can be easily restored because they are flexible and flexible.

After the bending mechanism 14 is removed, the flexible pipes 3a and 3b are connected to the mud feeding pipe 4 and the mud discharging pipe 6, respectively, as shown in FIG.
The compression and pressurization of the sludge pipe 4 and the sludge pipe 6 is released. When the compression and pressurization of the sludge pipe 4 and the sludge pipe 6 are released, the medium-density polyethylene pipes forming the sludge pipe 4 and the sludge pipe 6 have a restoration rate of 75% or more in the compression restoring test. Shape can be restored.

Thereafter, after removing the pressurizing / compressing device 12, muddy water is supplied again through the mud feeding pipe 4 and propulsion is performed while collecting the muddy water through the mud discharging pipe 6. One cycle of propulsion is completed. The above steps are repeated each time. When the propulsion is repeated, if the lengths of the sludge pipe 4 and the sludge pipe 6 wound around the drums 10 and 11 are insufficient, the sludge pipe 4 and the sludge pipe 6 wound around a new drum are removed. Just connect. When connecting the sludge pipe 4 and the sludge pipe 6, since the sludge pipe 4 and the sludge pipe 6 are formed of medium-density polyethylene pipes, they can be easily heated and fused.

In the above embodiment, the case where the mud feed pipe 4 and the mud discharge pipe 6 wound around the drums 10 and 11 are used has been described. However, as shown in the sectional view of FIG. A mud pipe 4 and a drain pipe 6 may be used.

In the above-described embodiment, the case where a medium density polyethylene pipe is used for the mud pipe 4 and the drain pipe 6 has been described. However, a synthetic resin pipe such as a vinyl chloride pipe which is flexible and has good compression / recovery performance is used. You may.

[0023]

As described above, according to the present invention, a sludge pipe and a sludge pipe which are arranged in a propulsion pipe and transport muddy water and muddy water are made of a medium-density polyethylene pipe which is flexible and has good compression / recovery performance. Since it is formed of a resin pipe and wound in advance in a coil or spiral shape and placed behind the machine,
Each time one cycle of propulsion is completed, it can be placed in the new pipe simply by pulling out the mud pipe and the mud pipe, and the mud pipe and the mud pipe need not be connected for each cycle of propulsion. The process can be simplified.

When a new pipe is connected to the propelled existing pipe, the existing mud pipe and the mud pipe are compressed and crushed in the existing pipe, and the mud and the mud water in the existing mud pipe and the mud pipe are compressed. Therefore, when the flexible pipe is removed from the mud pipe and the mud pipe, the muddy water and the mud water in the mud pipe and the mud pipe can be prevented from flowing out.

When joining an existing pipe and a new pipe,
Since the sludge pipe and the sludge pipe removed from the flexible pipe can be bent and accommodated in the existing pipe, when using a steel pipe as the propulsion pipe, the sludge pipe and the sludge pipe can be removed from the welded part. A centering jig for adjusting the groove can be used, and the propulsion pipe can be joined by good welding.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a muddy water propulsion method according to an embodiment of the present invention.

FIG. 2 is a construction process diagram when a new pipe is connected to an existing pipe.

FIG. 3 is a partial sectional view showing a pressurized and compressed state of a mud pipe.

FIG. 4 is a connection process diagram showing a process of connecting an existing pipe and a new pipe.

FIG. 5 is a sectional view showing a muddy water propulsion method according to another embodiment.

FIG. 6 is a sectional view showing a configuration of a muddy water propulsion method.

FIG. 7 is a partial sectional view showing a connection state of a new pipe.

[Explanation of symbols]

 3a, 3b Flexible pipe 4 Mud feeding pipe 6 Drain pipe 8 Existing pipe 8a New pipe 9 Starting pit 10 Drum 11 Drum 12 Pressurizing and compression device 13 Holding rod 14 Bending mechanism

────────────────────────────────────────────────── ─── Continuing on the front page (72) Takashi Nakajima, 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Teruyuki Matsumoto 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan (72) Inventor Yasuhiro Matsuo 122-6 Shimotsu Kokyu, Atsugi-shi, Kanagawa Prefecture (72) Inventor Satoshi Furuya 391-3 Minami-Toyoda, Hiratsuka-shi, Kanagawa Prefecture Happi-Shat-201 (72) Inventor Satoshi Mukai Ibaraki, Osaka Prefecture 2-12-5, Nishifukui, Nishi-shi (72) Inventor Kenichiro Miyazaki 131-2-905, Aruse, Igawaya-cho, Nishi-ku, Kobe-shi, Hyogo (56) References JP-A-61-95200 (JP, A) JP-A-60-5997 (JP, a) JP Akira 58-106095 (JP, a) JP flat 2-78527 (JP, a) JP flat 5-306600 (JP, a) (58 ) investigated the field (Int.Cl. ⁷ , DB name) F16L 1/024

Claims (2)

(57) [Claims] In a muddy water propulsion method in which sediment excavated in muddy water sent from a muddy water treatment facility is taken out and transported to the muddy water treatment facility as muddy water, the mud pipe is disposed in a pipe to be propelled and transports muddy water. And a mud pipe for transporting mud water are formed of a flexible synthetic resin pipe having good compression / restoring performance, and the mud feeding pipe and the mud pipe are wound in advance in a coil or spiral shape to be behind the excavator. After the propulsion is completed, the existing mud pipe and mud pipe are compressed and crushed in the propelled pipe, and then the flexible pipe connected to the mud water treatment facility is removed from the mud pipe and mud pipe, and then sent. After the tip of the mud pipe and the drain pipe are bent or folded and housed in the propelled existing pipe, the existing pipe and the new pipe are joined, and the existing pipe and the new pipe are joined, and then the mud pipe and the mud pipe are connected. Only the length according to the length of the propulsion pipe connected To restore the mud pipe and the mud pipe that has been bent or folded after starting, and connect the flexible pipes to the ends of the mud pipe and the mud pipe to release the crushing of the mud pipe and the mud pipe. A method of connecting a sending and receiving mud pipe. 2. The method for connecting a sludge pipe according to claim 1, wherein the sludge pipe and the sludge pipe are formed of a medium-density polyethylene pipe.