JPH07331647A - Boring pipe for injecting chemicals - Google Patents

Abstract

PURPOSE:To confirm the presence of a buried article from the ground, and to conduct boring without damaging the buried article by rotatably mounting a water injection hose nozzle for boring and a small-sized TV camera or an endoscope into the lower end of a boring pipe and extending a connecting pipe, which can be opened and closed, at the upper end of the boring pipe. CONSTITUTION:Water infection hoses 6 and a cable 9 are introduced into a boring pipe body 1. Nozzles 7 and a small-sized TV camera 10 or an endoscope at the front ends of the water infection hoses 6 and the cable 9 are fixed and installed onto a rotatably set-up discoidal holder 13. Consequently, even when the boring pipe body 1 is rotated, the discoidal holder 13 is not turned, and the water infection hoses 6 and the cable 9 are not twisted. Water is ejected from the water infection nozzles 7 through the water infection hoses 6 while the pipe body 1 is revolved by a rotary transmission section 4 for a boring device 3, and the pipe body 1 is pushed successively into the ground. Accordingly, the state of the ground excavated by an excavating blade 2 is confirmed from the ground, thus preventing the generation of an accident with the damage to a buried article 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the injection of a chemical liquid into the ground for the purpose of strengthening the ground around the underground structure when constructing various underground structures such as tunnels and foundations. The present invention relates to a drill hole pipe.

[0002]

2. Description of the Related Art Conventionally, when constructing an underground structure, a drilling hole is preliminarily drilled from the ground for the purpose of strengthening the ground around the structure or stopping water. Ground improvement is carried out by injecting a drug solution into the ground.

As a conventional chemical liquid injection method, a water supply hose is connected to the upper end of a boring rod to which a rotational force is given by a boring device via a water swivel, a boring rod having an excavating blade at the lower end, and water is injected from the lower end. While rotating it, push it into the ground to a predetermined depth, dig down to a predetermined depth while appropriately adding rods, and then pull up the rod upward while ejecting chemical liquid from the lower end of the rod by the water pump pressure. To build a layer of solidified body with the drug solution.

[0004]

The demand for this chemical injection work is increasing with the progress of urban development. In urban areas, however, gas pipes, water pipes, sewer pipes, and other pipes or Since many buried items such as common trenches for telephone and power cables are buried, it is necessary to investigate in advance the presence of these buried items near the construction site when performing construction.

Of course, it is possible to avoid injecting the chemical solution in the place where the existence of the above-mentioned buried object is confirmed, but some buried objects are difficult to confirm the existence such as under the national road. If it is necessary to inject the chemical liquid in such a case because it is sometimes located, the boring will be performed to the upper part of the depth where the buried object is estimated to exist.

[0006] As described above, when boring is performed in the ground where it is presumed that the buried object is present, the depth of the buried object is unknown, so that the boring rod is rotated. Excavation will accidentally damage the buried object and cause a major accident. Therefore, in order to prevent such accidents from occurring in the past, excavation was performed by moving the rod up and down while injecting water from the lower end of the boring rod into the ground where it is estimated that buried objects are present. Although such a method has been adopted, such a method cannot be said to be appropriate as a measure for preventing damage to the buried object, and has a problem that the efficiency is extremely poor.

[0007]

DISCLOSURE OF THE INVENTION The present invention is intended to solve the problems at the time of boring in the ground where such buried objects are presumed to exist. As a means, in a drilling pipe for injecting a chemical solution for constructing a solid for soil improvement in the ground, a water injection hose nozzle for drilling and a small TV camera or endoscope are drilled inside the lower end of the drilling pipe. It is characterized in that it is provided rotatably with respect to the inner wall of the pipe, and a connection pipe that can be opened and closed in half in the lengthwise direction is added to the upper end of the drilled pipe.

As a means for rotatably providing a water injection hose nozzle for drilling and a small TV camera or an endoscope inside the lower end of the drilled pipe with respect to the inner wall of the drilled pipe, the lower end of the drilled pipe is used. A disc-shaped holder that occludes the inner wall is rotatably provided on the inner wall, and a small TV is provided at the tip of the water injection hose and the tip of the camera cable that are electrically connected to the drilled pipe.
A camera or endoscope is fixedly attached to the disc-shaped holder.

[0009]

In the present invention, since the water injection hose nozzle for drilling and the small TV camera or the endoscope are rotatably provided with respect to the inner wall of the drilling pipe inside the lower end of the drilling pipe. When pushing the pipe into the ground, even if the drill pipe is rotated, the water injection hose and the cable for the TV camera, which are piped in the pipe, are not twisted, and the drill pipe is sprayed with water from the lower end cutting blade. While excavating while rotating, the presence or absence of underground buried objects can be monitored from the ground with a small camera or an endoscope in the process, so it is safe to drill a drill hole for chemical injection without fear of damaging the buried objects. Can be installed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a drilling pipe for chemical liquid injection according to the present invention will be described with reference to the embodiments shown in the drawings. FIG. 1 is an overall explanatory view of a drilling pipe 1 (boring rod), and FIG. It is an expanded sectional view showing the composition of the lower end part of tube 1. Further, as shown in FIG. 3, this drilling pipe 1 has a drilling pipe body 1 having a predetermined length with a drilling blade 2 at its lower end, and a connecting pipe 11 which is appropriately added above the drilling pipe body 1. First, the boring pipe main body 1 is supported by the rotation transmitting portion 4 of the boring device 3 to transmit the rotation, and is pushed into the ground by the excavating blade 2.

A water injection pump 5 and a television monitoring device 8 are provided outside the boring device 3, two water injection hoses 6 extending from the water injection pump 5 and a television cable extending from the television monitoring device 8. 9 is introduced into the pipe from the upper end of the drilled pipe main body 1 supported by the rotation drive unit 4 through a suspension guide 12 provided above the rotation transmission unit 4 in the boring device 3. 6
The nozzle 7 at the tip of the hole and the small TV camera 10 at the tip of the cable 9 are rotatably attached to the inner wall of the lower end portion of the drilled pipe body 1.

On the inner wall of the lower end portion of the bored pipe body 1, preferably right above the drilling blade 2, a disc-shaped holder 13 for closing the inner wall is rotated via a bearing 14 and a water stop O-ring 15. It is freely attached, and the water injection nozzle 7 at the end of the hose 6 and the small TV camera 10 at the end of the cable 9 are fixedly attached to the disc-shaped holder 13. The small TV camera 10 may be an endoscope.

The hole-drilling pipe body 1 is rotated by the rotation transmitting portion 4 of the boring device 3 while being poured into the water-filling hose 6.
After that, water is ejected from the nozzle 7 to be pushed into the ground one after another. As shown in FIG. 3, when it is necessary to add another drilling pipe after the drilling pipe body 1 is pushed to a predetermined depth, the connection pipe 11 is provided at the upper end of the drilling pipe body 1. Is added. As shown in FIG. 3, the connecting pipe 11 connects two gutter-shaped plates 16 by a hinge 17 so as to be openable and closable in the length direction, and a fixture 1 such as a ring or a band.
A cylindrical closed state can be maintained by means of 8, and both ends have connection portions 19 by screws or couplings that can be joined to the drilled pipe body 1 or another connection pipe 11.

When connecting the connecting pipe 11 to the upper end of the boring pipe main body 1, two gutter-shaped plates 16 are opened by hinges 17 and a water-filling hose 6 is hung from an upper hanging guide 12. Wrap the cable 9 and the inside and close
The boring pipe main body 1 is fixed by a fixture 18 to connect the lower end connecting portion 19 to the upper end of the boring pipe main body 1 so that the rotation by the rotation transmitting portion 4 is transmitted to the connecting pipe 11. Send it into the ground. Connection pipe 1 replenished as described above
When 1 is sent into the ground, another drilling pipe body 1 can be pushed to a predetermined depth by adding another connecting pipe 11 to the upper end of this connecting pipe 11.

[0015]

According to the drilled pipe of the present invention, the water injection hose 6 and the TV camera cable 9 are introduced into the pipe, and the hose 6 and the nozzle 7 at the tip of the cable 9 and the small TV.
Since the camera or the endoscope 10 is fixedly attached to the disc-shaped holder 13 rotatably provided on the inner wall of the lower end of the pipe, the disc-shaped holder 13 does not rotate even when the drill pipe 1 is rotated by the boring device 3. Therefore, drilling can be performed without twisting the hose 6 and the cable 9.

Since the hole drilling pipe can be rotated without being twisted to the hose 6 and the cable 9 arranged inside, the hose 6 and the cable 9 can be sequentially extended from the ground according to the depth of pushing the hole drilling pipe into the ground. A small TV camera or the endoscope 10 can be formed while water is jetted from the lower end of the drill pipe.
With this, while observing the ground condition of the drilled portion from the ground, it is possible to confirm the state without the buried object 20 and continue drilling.

The small TV camera or the endoscope 10 is located near the lower end of the drilled pipe, and water is continuously ejected from the lower end of the drilled pipe, so that the ground excavated by the drilling blade 2 is grounded. Since the state can be easily confirmed by a monitoring device on the ground, it is possible to confirm the abnormality of the ground state to be excavated when the excavating blade 2 approaches the buried object 20 in the ground, and immediately stop the drilling to stop the buried object 20. It is possible to prevent a major accident due to damage from occurring.

In addition to this, in the drilled pipe of the present invention, the drilled pipe main body 1 for mounting the drilled pipe to the water injection hose and nozzle, the TV cable and the camera, and the hose connected to the drilled pipe main body Since it is configured by the openable and closable connection pipe 11 that can conduct electricity to the cable, it is not necessary to remove the water injection hose or the TV cable when connecting the drilling pipe body and the connection pipe, and the connection operation of the connection pipe can be performed. It can be performed smoothly and efficiently in a dry state where it is not wet with water.

Further, according to the drilled pipe of the present invention, a small TV
Not only can you prevent the occurrence of accidents by confirming the presence of underground buried objects with a camera or an endoscope, but you can also cut the water injection hose and nozzle by turning them without twisting the drilling pipe that rotates. Since water can be ejected in the process of drilling, after finishing drilling to a specified depth without damaging the buried object, the drilling water ejected from the water injection nozzle is switched to the chemical solution to Through this, it is possible to extract the chemical liquid for ground improvement into the ground, and there is an advantage that the chemical liquid injection work at a portion where the buried object has been conventionally problematic can be performed safely while preventing damage to the buried object.

[Brief description of drawings]

FIG. 1 is an overall explanatory view of a drilled pipe for injecting a chemical liquid according to the present invention.

FIG. 2 is an enlarged cross-sectional view showing the configuration of the lower end portion of the hole-drilling pipe.

FIG. 3 is a cross-sectional view showing a boring process of a boring pipe.

FIG. 4 is a perspective view showing a configuration of a connection pipe connected to the hole-drilling pipe body.

[Explanation of symbols]

 1 Drilling Pipe Main Body 2 Drilling Blade 3 Boring Device 4 Rotation Transmission Unit 5 Water Injection Pump 6 Water Injection Hose 7 Water Injection Nozzle 8 Television Monitoring Device 9 Cable 10 Small TV Camera / Endoscope 11 Connection Pipe 12 Suspension Guide 13 Disc Holder 14 Bearing 15 O-ring 16 Gutter plate 17 Hinge 18 Fixture 19 Connection part 20 Buried object

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Claims (2)

[Claims] 1. A drilling pipe for injecting a chemical solution for constructing a solid body for ground improvement in the ground, wherein a water injection hose nozzle for drilling and a small TV camera or endoscope are provided inside the lower end of the drilling pipe. A drill pipe for injection of a chemical liquid, which is rotatably provided on an inner wall of a drill pipe, and a connecting pipe which can be opened / closed in half in a length direction is added to an upper end of the drill pipe. 2. A disc-shaped holder for closing the inner wall of the drilled pipe is rotatably provided on the inner wall of the lower end of the drilled pipe, and the nozzle at the tip of the water injection hose and the tip of the camera cable connected to the drilled pipe. The hole piercing pipe for chemical injection according to claim 1, wherein a small TV camera or an endoscope is fixedly attached to the disc-shaped holder.