JP2987798B2 - Underground drilling method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground drilling method and apparatus for burying an underground pipe such as a sewer pipe.

[0002]

2. Description of the Related Art In order to bury an underground pipe such as a sewage branch pipe from a sewage main pipe to a sewage reservoir in each household, a method of burrowing the ground to bury the ground is used. In addition to hindering traffic when burying, when vehicles pass on the road surface after backfilling, the laid pipes may sink.

[0003] There is also a method of drilling into the ground using an excavator and inserting pipes. However, it is difficult for a normal excavator to drill in a straight line due to obstacles such as stones existing in the ground.
In addition to the difficulty of inserting pipes, the drilling speed is low,
Drilling cannot be performed efficiently.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to propose a method of drilling underground in which a straight hole can be efficiently drilled at a high speed by a simple operation, and the pipe can be easily inserted. That is. Another object of the present invention is to propose an underground drilling device capable of efficiently drilling a straight hole at a high speed with a simple structure and operation.

[0005]

(1) A tip member having a digging blade and a water spout at the tip and the periphery rotates a pipe member attached to the tip and advances while spouting water from the water spout. And connect a new pipe member
Repeating the above operation to form a guide hole,
A step of pulling out the pipe member from, and rotating a pipe member having a cutter having a water ejection port and an excavating blade attached to the tip of the guide member on the rear side, with the guide member inserted into the guide hole, Drilling a main hole having a diameter larger than that of the guide hole by ejecting water from a water outlet and moving forward. (2) joining the distal end member at the distal end has a tubular member capable joining other tubular member at a rear end, a digging edge and water spout the tip and the peripheral portion, attached to the tip of the tube member A tip member for drilling a guide hole, a water jet port and a drilling blade at the rear of the guide member insertable into the guide hole, and a cutter for drilling a main hole attached to the tip of the pipe member; above, including a rotary device for rotating and a water supply device for supplying water to the inside rotation state of the tube member, and a forward and backward device for advancing or retracting the rotary device
(1) underground drilling method for underground drilling apparatus according.

[0006] The perforation in the present invention is suitable as a perforation for burying an underground pipe such as a sewage branch pipe extending from a sewage main pipe to each home or the like, but can also be applied to perforations for other purposes.
The direction of the hole may be a horizontal direction, an inclined direction, or any other direction. The pore size is not limited, but 25 to 4
It is suitable for perforation of about 00 mm, preferably about 50 to 300 mm.

In the present invention, the pipe member used for perforation has an outer diameter of 19 to 60 mm, preferably 29 to 50 mm.
Are suitable. A male screw having an external thread at one end and a female thread at the other end and having rigidity capable of being joined in the axial direction can be used.

The tip member for drilling the guide hole is preferably a tapered shell having a female thread so that it can be screwed to the tip of the pipe member, and has a drilling blade for drilling the guide hole at the tip and the periphery. And what has a water ejection hole in front of rotation of a drilling blade is preferable. Guide hole diameter is 20-70m
m, preferably about 30 to 60 mm, and the dimensions of the tip member and the excavation blade formed therein are determined so that the hole can be drilled.

The main hole drilling cutter has a water ejection hole and an excavation blade on the rear side of a guide member inserted into the guide hole, and is configured to excavate a main hole larger than the guide hole. As the guide member, a rod-shaped member that can be inserted into the guide hole is preferable, and a member in which a tip member having no excavating blade and a water jet port is attached to a pipe member can be used. The digging blade provided on the rear side of the guide member preferably has a blade attached to an annular body.

A cutting material such as diamond titanite is used as the excavating blade. A motor can be used as the rotating device, and a water-sealed jacket-like device can be used as the water supply device. Further, as the forward / backward device, a device in which a rotating device provided with a pipe member travels on a rail can be used.

An underground drilling method using a drilling device according to the present invention comprises:
The pipe member with the tip member for guide hole drilling attached to the tip is attached to the rotating device and rotated, and while the water is supplied from the water supply device to the inside of the tube member and is ejected from the water outlet, the rotating device is moved by the forward / backward retracting device. Excavation is performed by moving forward.
The rotating device removes and retracts the tube member at the forward position, connects a new tube member, and repeats the above operation to perforate the guide hole.

Thereafter, the pipe member and the distal end member are pulled out, and the guide member attached to the cutter is inserted into the guide hole, and the pipe member connected to the cutter is mounted on the rotating device and rotated, so that the pipe member is inserted from the water supply device into the pipe member. Excavation is performed by advancing a rotating device by an advancing and retreating device while supplying water and ejecting it from a water ejection hole. The rotating device removes and retracts the pipe member at the forward position, newly connects the pipe member, and repeats the above operation to drill a main hole.

In the above-described guide hole drilling, since a guide hole having a diameter larger by 1 to 10 mm than the pipe member is drilled by the excavating blade while water is jetted out, a linear guide hole can be formed. Then, while the guide member of the cutter is inserted into and guided by the guide hole after the formation of the guide hole, the main hole can be formed linearly along the guide hole by ejecting water and excavating the main hole.

After the main hole is formed, when the pipe is buried, if the pipe is inserted while being joined, the main hole is formed in a straight and clean excavation surface, so that the pipe is easily inserted and the pipe is buried. Done.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A is an exploded perspective view showing a combination of a tip member for drilling a guide hole and a tube member, FIG. 1B is an exploded perspective view showing a combination of a guide member and a cutter, and FIG. ) In the direction of arrows AA, (b) is a perspective view of the tube, FIG.
4 is a vertical sectional view showing the punching device, and shows a BB section of FIG. 4, and FIG. 4 is a plan view of the gantry of FIG.

In the figure, reference numeral 1 denotes a pipe member, in which a male screw 1a is formed at one end of a steel pipe, and a female screw 1c is formed at a large diameter portion 1b formed at the other end. And it can be made longer in the axial direction.

2 is a tip member for drilling a guide hole,
It has a female screw 2a that engages with the male screw 1a, and is formed in a tapered shell shape. It has one excavating blade 2b at its tip and two peripherals at the side, and has a water jet 2c in front of the rotation of the peripheral excavating blade 2b.

Reference numeral 3 denotes a guide member having a structure in which a guide tip member 4 is screwed to the tip of the tube member 1. The tip member 4 is formed in the shape of a tapered cannonball having substantially the same shape as the tip member 2 without the excavating blade 2b and the water jet port 2c, and a female screw 4a to be screwed to the male screw 1a is formed at the base.

The cutter 5 has, at one end, a male thread portion 5a screwed to the female thread portion 1c so as to be attached to the rear portion of the guide member 3, and has a female thread portion 5b to which the male thread portion 1a of the pipe member 1 is screwed. At the other end. The water outlet 5c and the excavation member 6 are provided from the male screw portion 5a side.
The excavation member 6 is an annular body 6a having a shape obtained by cutting a pipe into rings.
Are fixed by supports 6b and 6c extending from the shaft 5d. An excavating blade 6d is attached to the front of the annular body 6a and the support 6b at an angle so as to scrape the earth and sand by rotation and collect the earth and sand toward the center (rotation axis).

Reference numeral 10 denotes an excavator, in which a motor 11 as a rotating device travels on a rail 13 provided on a gantry 12 and moves forward and backward. A water seal jacket type water supply device 15 is fixed to a casing 14 of the motor 11, and a water supply pipe 16 is connected thereto. The hollow pipe 17a of the reducer 17 directly connected to the rotating shaft of the motor 11
5 is rotatably and water-supplied. A male screw portion 17b is formed at the tip of the reducer 17, and is screwed to the female screw portion 1c of the tube member 1. 16a is a valve.

The motor 11 is supported on a slide 18 that slides on the rail 13. A pinion 19 is provided on the slide 18.
Is mounted on the rack 20 provided on the rail 13.
The slide 21 is rotated by the rotation of the handle 21 to move the slide table 18 forward and backward. Stand 1
A guide column 22 is provided in front of 2, and a guide port 23 that allows passage of the pipe member 1 is formed. In addition, mounting holes 24 are formed at the four lower corners of the gantry 12, and are fixed to a base 26 by fixing pins 25.

The underground drilling method using the above-described apparatus is shown in FIG.
A tip member 2 for drilling a guide hole shown in (a) is screwed to the tip of the pipe member 1, and this is connected to the excavator 10 as shown in FIG.
And attached to the tip of the reducer 17. At this time, the motor 11 is rotated at the retracted position,
When water is supplied from the water supply device, the water is supplied from the water supply device 15 to the reducer 17.
Then, the water is spouted from the water jet port 2c through the inside of the pipe member 1, and the pipe member 1 and the tip member 2 rotate.

When the slide 21 is advanced by rotating the handle 21 in this state, the earth and sand is scraped off by the rotation of the excavating blade 2b, which is fluidized by the jetted water and is washed away. Therefore, the tip member 2 moves forward with a small resistance, and a linear guide hole is excavated.

At the position where the motor 11 has moved forward, the reducer 17 is removed while the pipe member 1 is left as it is, and the motor 11
Retreat. Then, another tube member 1 is connected to the reducer 17 and also to the tube member 1 in the advanced position.
In this state, excavation is performed by moving forward in the same manner as described above, and this is repeated.

At the stage where the tip member 2 reaches the destination and the guide hole penetrates, the water supply is stopped, the motor 11 is retracted, and the rearmost tube member 1 is removed. In this state, the motor 11 is advanced, the reducer 17 is screwed to the remaining tube member 1, and the operation of retracting the motor and removing the tube member 1 is repeated.

In this manner, the operation of pulling out the tube member 1 is performed, and when the last tube member 1 is retracted, the distal end member 2 and the tube member 1 are removed from the reducer 17. Then, instead of this, the guide member 3 in which the tip member 4 shown in FIG. 1B is screwed to the tip of the tube member 1 and integrated with the tip of the cutter 5 by screwing, is connected. The male thread portion 17b of the reducer 17 is screwed and mounted on 5b.

When the motor 21 is advanced by rotating the handle 21 in this state, the guide member 3 in which the distal end member 4 and the tube member 1 are integrated is inserted into the guide hole that has already been drilled. At the forward position of the motor, the reducer 17 is removed from the cutter 5 and retracted. Then, another pipe member 1 is screwed and connected between the cutter 5 and the reducer 17, and the motor 11 is rotated and water is supplied from the water supply device 15 to move forward.

As a result, it is guided by the guide member 3,
The water spout 5c spouts water while rotating in the guide hole,
At the same time, when the excavating member 6 rotates, the excavating blade 6d scrapes the earth and sand. The shaved sand is fluidized by water and flows toward the front. At this time, since the guide member 3 advances along the already formed linear guide hole, the cutter 5 scrapes the earth and sand around the guide hole in a certain range to form a linear main hole.

At the forward position of the motor 11, the reducer 17 is detached from the tube member 1, the motor 11 is retracted, a new tube member 1 is connected and moved forward, and the main hole is penetrated by repeating this. After penetrating the main hole, the pipe member 1 is pulled out in the same manner as in the case of the guide hole, and finally the cutter 5 and the guide member 3 are also pulled out, and the perforation is completed.

When a pipe is buried in the main hole, the pipe is inserted into the main hole formed as described above and buried. In FIG. 2 (b), reference numeral 7 denotes a tube made of polyvinyl chloride, and one end portion 7 thereof.
a into the main hole, apply an adhesive to the inner surface 7c of the enlarged diameter portion 7b formed at the other end, insert the one end 7a of the other tube 7 and insert it while joining, so that the tube is inserted. Burial is completed.

In this case, since the main hole is formed in a straight line,
The tube 7 whose main hole and the enlarged diameter portion 7b have substantially the same diameter can be easily inserted. In this case, since the gap with the stratum is small, the embedding is completed without requiring backfill of earth and sand in the gap. In this case, the buried pipe has little settlement after burial because the gap with the stratum is small.

In the above operation, when the diameter of the guide hole is largely different from that of the main hole, an intermediate diameter guide hole can be formed by using the intermediate diameter cutter 5.
Further, the structures of the tube member 1, the tip members 2, 4, the guide member 3, the cutter 5, and the like are not limited to those shown in the drawings, and can be changed.

Although the above description is for the case of drilling in the horizontal direction, by drilling the base 26 or the gantry 12, drilling in the inclined direction is possible. Although the above description has been made with respect to an example in which a pipe is buried, the present invention can be applied to perforation for other purposes.

[0034]

According to the underground drilling method of the present invention, a cutter provided with a drilling blade and a tip member having a water ejection hole is advanced while rotating while rotating a pipe member, and then a cutter guided by the guide member. Excavation while jetting water, so that the resistance of excavation can be reduced and a linear guide hole can be formed, and a small range of soil is removed with a small resistance to form a straight main hole The drilling can be performed efficiently with a simple operation at a high speed.

In the underground drilling device of the present invention, the pipe member provided with the tip member or the tube member provided with the guide member and the cutter is mounted on the motor so as to be able to move forward and backward. Hole can be efficiently drilled at high speed.

[Brief description of the drawings]

FIG. 1A is an exploded perspective view showing a combination of a guide hole tip member and a pipe member, and FIG. 1B is an exploded perspective view showing a combination of a guide member and a cutter.

2 (a) is a view taken in the direction of arrows AA in FIG. 1 (b), and FIG. 2 (b) is a perspective view of a tube.

FIG. 3 is a vertical sectional view of the punching device.

FIG. 4 is a plan view of the gantry of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipe member 1a, 5a, 17b Male thread part 1b Large diameter part 1c, 2a, 4a, 5b Female thread part 2b, 6d Drilling blade 2c, 5c Water jet port 2, 4 Tip member 3 Guide member 5 Cutter 5d Shaft 6 Drilling member 6a Annular body 6b, 6c Support body 7 Pipe 10 Excavator 11 Motor 12 Mount 13 Rail 14 Casing 15 Water supply device 16 Water supply pipe 16a Valve 17 Reducer 18 Slide table 19 Pinion 20 Rack 21 Handle 22 Guide post 23 Guide opening 24 Mounting hole 25 Fixing pin 26 Base

Claims (2)

(57) [Claims] 1. A tip member having an excavation blade and a water jet at a tip and a peripheral portion rotates a pipe member attached to the tip and advances while jetting water from the water jet port to advance a new pipe member. A step of connecting and repeating the above operation to drill a guide hole, a step of pulling out the pipe member from the guide hole, and a pipe having a cutter having a water jet port and a cutting blade at the rear end of the guide member attached to the tip. Rotating the member while the guide member is inserted into the guide hole, moving the member forward while ejecting water from a water outlet, and perforating a main hole having a diameter larger than the guide hole. Underground drilling method. Joining the tip member 2. A distal end portion includes a tubular member capable joining other tubular member at a rear end, a digging edge and water spout the tip and the peripheral portion, the distal end of the tube member A tip member for drilling a guide hole, which is attached to a guide member; a cutter for drilling a main hole, which has a water jet port and a drilling blade at the rear of the guide member that can be inserted into the guide hole, and is attached to the tip of the pipe member; 2. The underground drilling method according to claim 1 , further comprising: a rotation device configured to rotate the pipe member; a water supply device configured to supply water to the inside of the pipe member in a rotating state; and a forward retraction device configured to advance or retreat the rotation device. Perforator.