JP4151046B2 - A method of embedding a perforated pipe with a ground cutting device. - Google Patents

Description

[0001]
[Industrial application fields]
Various types of perforated pipes (drain pipes) for draining water that has permeated into the ground, such as slopes and tunnels, or perforated pipes (water absorbing pipes) that are buried when digging wells on the ground A method of burying a perforated tube for each is provided.
[0002]
[Previous issues]
Conventionally, perforated pipes (drain pipes) for draining water that has permeated into the ground, such as in slopes and tunnels, or perforated pipes (water absorption pipes) that are buried when digging a well on the ground As a method of embedding perforated tubes for each of the
1. After drilling a hole for embedding a perforated pipe with a grinder, insert a perforated pipe into the excavation hole and embed it.
2. Boring and steel pipes are buried with a ground cutting device, a perforated pipe is inserted into the steel pipe, and then the steel pipe is drawn out and collected.
[0003]
However, the ground that originally needs draining, and the ground that contains water to dig wells are mostly sand, cobblestone, gravel, bedrock and mud, and there are many alternate layers of them. After recovering the water, it is difficult to insert the perforated pipe when the ground (for example, mud, sand, gravel, cobblestone) or the mud ground that is easily collapsed is inserted until the perforated pipe is inserted. In many cases, it is difficult to pull out and collect the steel pipe due to jamming or the like, which makes the above-described conventional method more difficult.
[0004]
Conventionally, plastic pipes (eg, polyvinyl chloride pipes), stainless steel pipes, steel pipes, etc. have been used as perforated pipes for draining water, absorbing water, etc. Recently, plastic pipes such as polyvinyl chloride pipes are often used. Has been.
However, plastic pipes (eg, PVC pipes) have a problem that the strength is significantly inferior to metal pipes such as steel pipes.
[0005]
In addition, since the perforated pipe has a large number of small holes on its peripheral surface, it is much weaker than a normal pipe against a load in the rotational twisting direction, and is a plastic perforated pipe (for example, a PVC pipe). ) Was particularly weak, so it was impossible to rotate and grind for burial.
[0006]
Therefore, when embedding a perforated tube that is soft and fragile, such as a plastic perforated tube (for example, a PVC tube), that is inappropriate for rotational cutting and propulsion, it can be propelled without rotating and without strong resistance. Towing and embedding has been the subject, but no such means have been provided.
[0007]
[Invention of prior application of invention]
See FIGS.
The applicant / inventor previously disclosed in Japanese Patent Application Laid-Open No. 2001-32666 “Decision Bit of Ground Grinding Device”, a turning bit with a turning bit 101 that can be expanded and contracted, an air hammer 102, an auger 103, and A steel pipe 104 with a crown bit, and a rotary bit 101a, 101b with the pivot 105 as a fulcrum, and the cutting bit 101 being rotated by the rotary drive means 106 and propelled by the propulsion means 107; In addition, the excavation hole 108 having a diameter larger than the outer diameter of the steel pipe 104 is advanced by the rotary earthing (rotation driving means 106) of the auger 103, and the steel pipe 104 is pulled.
[0008]
The rotating bit 101a, 101b is rotated and reduced forward by a set angle with the pivot 105 as a fulcrum, and the steel pipe 104 is cut by the crown bit 104a by propulsion driving of the steel pipe 104 in a state where the cutting bit 101 is pulled back into the steel pipe 104. Advance
[0009]
Further, from the state in which the turning bits 101a and 101b are reduced and the cutting bit 101 is pulled back into the steel pipe 104, the cutting bit 101, the air hammer 102, and the auger 103 are passed through the steel pipe 104 into the start shaft 109. An apparatus is provided which is pulled back and collected to perform ground cutting and steel pipe embedding.
[0010]
[Problems solved by the invention]
Accordingly, the present invention utilizes and applies the above-mentioned prior invention device and the method of cutting the ground and embedding a steel pipe with the device, and in particular, a perforated tube that is particularly weak against a load in the rotational torsion direction. In order to embed perforated pipes that are inappropriate for rotational cutting and propulsion, such as perforated plastic pipes (for example, PVC pipes), pull the pipes without rotation and without resistance. The present invention solves the above-mentioned conventional problems by developing and providing a method for embedding various types of perforated pipes for draining water, absorbing water, etc. that can be embedded very easily.
[0011]
[Means for solving the problems]
That is, the present invention has a ground biting device equipped with a turning bit with a turning bit that can be freely expanded and reduced, an air hammer and an auger on the start side, and a turning bit with a turning bit of the turning device. In the state where the rotating bit is expanded, the rotation driving of the cutting bit, the blow of the air hammer, and the rotary earthing of the auger are carried out, and the drilling hole having a diameter larger than the outer diameter of the pipe to be embedded is advanced, As the cutting progresses, the auger with the set length is connected one after the other on the start side and the pipe is embedded with the set length of the buried tube one after another. In the method of burying
[0012]
The pipe to be embedded is a perforated pipe having a strength weaker than that of a steel pipe with respect to a load in the direction of rotational twisting, and in a state where the turning bit of the turning bit with the turning bit of the turning device is expanded. The drilling hole is drilled with a diameter larger than the outer diameter of the perforated pipe, and the tip of the perforated pipe is attached to the grinding bit by propulsion drive rotation of the grinding bit, blow of the air hammer, and rotary earth removal of the auger. In conjunction with the non-rotating state, the perforated pipe is pulled and inserted into a drilling hole having a diameter larger than its outer diameter along with the cutting of the cutting bit, and set on the starting side as the cutting progresses. Connect a long auger one after another and move forward and connect a perforated tube of a set length one after another and insert it by traction,
[0013]
When the target point is reached, the cutting bit with rotating bit, the air hammer and the auger are pulled in the starting direction, and the tip of the rotating bit of the cutting bit is rotated and reduced inward from the inner diameter of the perforated tube. Then, the cutting bit is pulled back into the perforated pipe, and in that state, the cutting bit with rotating bit, the air hammer and the auger are collected through the perforated pipe to the starting side, and the perforated pipe remains in the drilling hole. The problem has been solved by a method of embedding a perforated pipe with a ground cutting device characterized in that a perforated pipe is buried.
[0014]
【Example】
Examples will be described.
See FIGS.
A turning bit 1 with a turning bit that can be expanded and contracted, an air hammer 2 and an auger 3 are provided. 7, drilling of the air hammer 2, and the rotary earth removal action of the auger 3, the drilling hole 8 larger than the outer diameter of the perforated pipe 4 is advanced,
[0015]
For example, a collar 10 attached to the tip of the perforated tube 4 is attached to the cutting bit 1 in a state in which the tip of the perforated tube 4 is not rotated (unlike rotating in the case of embedding a steel pipe). The perforated tube 4 is pulled and inserted into the excavation hole 8 having a diameter larger than the outer diameter thereof by linking with appropriate means such as engaging with the rear end. Connect the augers 3 one after the other and pull the perforated tubes 4 of the set length one after the other,
[0016]
Reaching the target point, pulling the turning bit 1a, 1b with the cutting bit 1, the air hammer 2 and the auger 3 in the direction of the starting side 9 and turning the tip of the turning bit 1a, 1b of the cutting bit 1 with the pivot 5 as the fulcrum The cutting bit 1 is retracted inward from the inner diameter of the perforated tube 4 and the cutting bit 1 is pulled back into the perforated tube 4. In this state, the cutting bit 1 with the rotating bits 1 a and 1 b, the air hammer 2, and the auger 3. The ground drilling device is characterized in that the perforated pipe 4 is embedded by recovering the perforated pipe 4 through the perforated pipe 4 to the starting side 9 and leaving the perforated pipe 4 in the excavation hole 8. This is a method of embedding a perforated tube.
[0017]
【effect】
Conventionally, perforated pipes (drain pipes) for draining water that has permeated into the ground, such as in slopes and tunnels, or perforated pipes (water absorption pipes) that are buried when digging a well on the ground When burying perforated pipes for each of the above, the ground that originally needs draining, and the ground that contains water that wants to dig wells are mostly sand, cobblestone, gravel, bedrock and muddy ground, Since there are many such alternating layers of ground, after recovering the drilling device and before inserting the perforated pipe, the ground that tends to collapse (e.g., mud, sand, gravel, cobblestone) There was a problem that it was very difficult to insert the perforated pipe because it was blocked, and it was extremely difficult to pull out and collect the steel pipe due to jamming etc.
In the present invention, since the drilling hole having a diameter larger than the outer diameter of the perforated pipe is advanced in the expanded state of the rotating bit, the perforated pipe is pulled and inserted into the large diameter drilling hole. There is an excellent feature that allows easy and smooth embedding of a perforated tube without any trouble.
[0018]
In addition, since the perforated pipe has a large number of small holes on its peripheral surface, it is much weaker than a normal pipe, especially for strength in the direction of rotational twisting. Since pipes (e.g., PVC pipes) are weak, it was impossible to rotatively drive and embed the pipes by themselves, as in the case of embedding conventional steel pipes. Since the present invention embeds a perforated tube that is not suitable for rotational cutting and propulsion because it is weak and fragile, such as a plastic perforated tube (e.g., a polyvinyl chloride tube), the perforated tube itself is rotationally driven. In addition, it is embedded in a large-diameter hole without strong resistance, so it is extremely easy and efficient to embed soft and fragile perforated pipes such as plastic perforated pipes (for example, PVC pipes). There is a breakthrough feature that can be done.
[Brief description of the drawings]
FIG. 1 is a partially cut-away enlarged front view of a cutting bit (rotating bit expanded state) and a leading perforated tube portion of a ground cutting device (FIG. 4) used for carrying out the method of the present invention.
FIG. 2 is a right side view of FIG.
FIG. 3 is a view showing a state in which the turning bit of FIG. 1 is turned forward (reduced), the cutting bit is pulled back into the perforated pipe, and the cutting bit and the like are collected leaving the perforated pipe.
FIG. 4 is a diagram showing a schematic configuration of an example of a ground cutting device used for carrying out the method of the present invention.
FIG. 5 is a partially cut-out enlarged front view of an embodiment cutting bit (rotating bit expanded state) and a leading steel pipe portion of a conventional apparatus.
6 is a right side view of FIG. 5;
7 is a view showing a state in which the turning bit of FIG. 5 is turned forward (reduced) and the cutting bit is pulled back into the steel pipe.
FIG. 8 is a diagram showing a schematic configuration of an example of a ground cutting device using the embodiment cutting bit of FIG. 5;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cutting bit 1a Rotating bit 1b Rotating bit 2 Air hammer 3 Auger 4 Perforated pipe 5 Axis 6 Rotation drive means 7 Propulsion means 8 Drilling hole 9 Start (mining) side 10 Color Hereinafter, conventional example 101 Cutting bit 101a Rotation bit 101b Rotation bit 102 Air hammer 103 Auger 104 Steel pipe 105 Axle 106 Rotation drive means 107 Propulsion means 108 Drilling hole 109 Starting pit 110 Crown bit

Claims (1)

A ground cutting device equipped with a turning bit with a rotating bit that can be expanded and contracted, an air hammer and an auger is installed on the starting side, and the rotating bit of the cutting bit with the rotating bit of the cutting device is expanded. In the open state, the rotation drive of the cutting bit, the blow of the air hammer, and the rotary auger of the auger are carried out, and the drilling hole larger in diameter than the outer diameter of the pipe to be embedded is advanced. In the method of burying the pipe by the ground cutting device, the auger of the set length is connected one after another on the start side and the cutting is performed and the pipes of the set length are connected and inserted one after another.
The pipe to be embedded is a perforated pipe having a strength weaker than that of a steel pipe with respect to a load in the direction of rotational twisting, and in a state where the turning bit of the turning bit with the turning bit of the turning device is expanded. The drilling hole larger than the outer diameter of the perforated pipe is advanced by the rotational drive propulsion of the cutting bit, the blow of the air hammer, and the rotary earthing of the auger. In conjunction with the state of not rotating, the perforated pipe is pulled and inserted into a drilling hole having a diameter larger than the outer diameter thereof along with the cutting of the cutting bit, and on the start side as the cutting proceeds. Connect the augers of the set length one after another and advance, and connect the perforated pipes of the set length one after the other and pull and insert,
When the target point is reached, the cutting bit with rotating bit, the air hammer and the auger are pulled in the starting direction, and the tip of the rotating bit of the cutting bit is rotated and reduced inward from the inner diameter of the perforated tube. Then, the cutting bit is pulled back into the perforated pipe, and in that state, the cutting bit with rotating bit, the air hammer and the auger are collected through the perforated pipe to the starting side, and the perforated pipe remains in the drilling hole. , Characterized by burying a perforated tube,
A method of embedding a perforated pipe with a ground cutting device.

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