JP2001254585A - Drilling construction method of bedrock or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent generation of mud when drilling bedrock or the like, and containing dust and water deposited at the opening part of a hole from returning back to a hole. SOLUTION: Surface such as bedrock is drilled by a downhole drill for drilling, at the same time compressed air is operated on a part to be drilled, dust being generated by drilling is removed to the outside of a hole 8, and at the same time the hole 8 is dug up to a specific depth under the ground. When the hole 8 is to be drilled, a cylindrical weir 100 that goes around along its opening end by one circle and projects from a ground surface 6 is installed at an opening 7 to the ground surface 6 of the hole 8 for setting so that dust being removed from the hole 8 cannot return back into the hole 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piercing method applied to form a hole for burying a pillar for landslide prevention or a pillar as a foundation of a building deep underground. The present invention relates to a method for piercing rock or the like, which prevents dust generated when piercing rock or the like and removed to the outside of the hole from returning to the hole.

[0002]

2. Description of the Related Art At present, a drilling apparatus 1 having the structure shown in FIG. 9 is used for performing such a drilling method. In the drilling device 1, a down-the-hole drill 3 is provided at a lower end of a hollow rod 2, and a thrust device 10 for applying gravity to the down-the-hole drill 3 is provided at an upper end of the rod 2, and an electric motor is used as a driving source. A rotation device 12 for rotating the down-the-hole drill 3 is provided. With the rod 2 suspended by a crane or a special cart,
Drilling is performed with the tip of the down-the-hole drill 3 positioned on the ground surface 6.

The down-the-hole drill 3 includes a hammer 4
And a bit 5a connected to the tip of the hammer 4 so as to freely move up and down. The tip surface of the bit 5a has a tip surface 5
b is formed. When compressed air is supplied from the air compressor 11 to the hammer 4 via the rod 2,
The hammer 4 is lifted upward by the pressure. afterwards,
When the compressed air is exhausted to the outside, its own weight and thrust device 1
The hammer 4 falls freely by the gravity of 0. When the hammer 4 falls freely, the impact is transmitted to the bit 5a, and the tip surface 5b is hit against the cutting blade surface 9 at the bottom of the hole while rotating, so that the hole 8 is dug.

[0004] The cutting edge surface 9 is shaved by the impact of the hammer 4 moving up and down, generating dust. Due to the action of the compressed air exhausted when the hammer 4 falls freely, the dust passes through the opening 7 from the bottom of the hole 8 through the gap with the hammer 4.
From the outside. In this case, the light fine dust f1 is scattered, and the heavy coarse dust f2 is deposited around the opening 7. The accumulated dust f2 easily returns to the inside of the hole 8 from the opening 7, and when the dust f2 accumulates on the cutting surface 9, the tip surface 5b hinders the force of digging the cutting surface 9. In order to prevent such an inconvenience, the dust f2 deposited by heavy equipment or manually is removed at predetermined time intervals.

[0005] In the above-mentioned perforation method, fine dust f1 is scattered to deteriorate the environment, and in addition, nearby people and workers may inhale the dust f1 and harm health. In particular, when drilling a rock or the like, a large amount of fine dust f1 is generated and scattered around, causing a serious pollution problem. Then, fine dust f1 generated by perforation
In order to prevent scattering of the air, the opening 7 of the hole 8 is covered with a cover body, a discharge pipe is attached to the cover body, and the dust is drawn out from the discharge pipe to a dust collection box or the like by a suction device. Proposed.

[0006]

However, in the above-described drilling method, coarse dust f2 remains around the opening 7 of the hole 8 and accumulates. Therefore, the drilling operation is interrupted every predetermined time. In addition, it is necessary to remove dust accumulated from the case body. Also, when the water collides with the water vein in the middle of the drilling, the mud containing water is removed from the hole 8 and the opening 7 is opened.
Spills around. Since the discharged mud is hindered by the case body and is not discharged to the outside, in order to prevent the mud from returning to the hole 8, the drilling operation must be frequently interrupted to perform the removing operation. The efficiency drops significantly.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problem, and prevents muddy dust or moisture generated at the time of drilling rock or the like and accumulated at the opening of a hole from returning to the hole. It is an object of the present invention to provide a drilling method for rock or the like that can efficiently perform drilling work.

[0008]

The piercing method according to the present invention comprises:
It drills the surface of rock or the like with a drill for drilling, and applies compressed air to the drilled portion to excavate the dust generated during drilling to the outside of the hole and dig the hole to a predetermined depth in the ground. When digging a hole, by installing a cylindrical weir that goes around the opening edge and protrudes from the ground surface at the opening to the ground surface of the hole, dust removed from the hole It is set to a state where it does not return to, and drilling proceeds.

According to the second aspect of the present invention, the cylindrical weir is a closed structure capable of trapping dust generated at the time of piercing, and a dust discharge pipe is communicated with the cylindrical weir. The dust trapped in the cylindrical weir is guided to the outside by the discharge pipe and collected.

In the third aspect of the present invention, the cylindrical weir has an opening, and the cylindrical weir is covered with a case body having an outlet, so that the cylindrical weir is discharged into the case from the opening of the cylindrical weir. Dust is collected outside through the discharge port.

According to a fourth aspect of the present invention, the surface of rock or the like is pierced by a drill for piercing, and compressed air is applied to the piercing portion to remove dust generated during piercing to the outside of the hole. It is to dig a hole to a predetermined depth in the ground, and when digging the hole, the opening to the ground surface of the hole is allowed to take out dust from the hole, but the return of dust to the hole is prevented. By closing with a lid having a valve mechanism, a state is set in which dust removed from the hole does not return to the inside of the hole, and the drilling is advanced.

[0012]

In the drilling method according to the first aspect of the present invention, a cylindrical weir is installed at the opening edge of the ground surface of the hole so that the dust removed from the hole does not return to the inside of the hole. Perforations are not impeded by the reverted dust.

According to the second aspect of the present invention, since the cylindrical weir is a closed structure, and the dust discharge pipe is connected to the cylindrical weir, the dust removed from the hole is not scattered and flows from the discharge pipe. Guided outside and collected.

According to the third aspect of the present invention, since the cylindrical weir is covered with the case body having the discharge port, the dust removed from the hole is collected outside from the discharge port without scattering.

According to the fourth aspect of the present invention, the opening to the ground surface of the hole is closed by a lid having a valve mechanism that allows only the extraction of the dust from the hole, thereby removing the dust removed from the hole. Is set so as not to return to the inside of the hole, so that the dust does not return to the inside of the hole to hinder the perforation.

[0016]

1 and 2 show two types of drilling methods according to an embodiment of the present invention. In the drilling method shown in FIG. 1, when digging a hole 8, a tubular weir 100 that goes around the opening edge and protrudes from the ground surface 6 is installed at an opening 7 of the hole 8 to the ground surface 6. As a result, coarse dust f2 removed from the hole 8 and deposited near the opening 7
Is set so as not to return into the hole 8. In addition,
The cylindrical weir 100 may be installed so as to be inserted into the hole 8 as in this embodiment, or may be installed so as to surround the opening 7 from the periphery.

The drilling method shown in FIG. 2 permits the opening 7 to the ground surface 6 of the hole 8 and the extraction of the dust f1 and f2 from the hole 8 when digging the hole 8, but the dust to the hole 8 1, f
2 is closed by a lid 105 having a valve mechanism 106 for preventing return, so that dusts f1 and f2 removed from the hole 8 do not return into the hole 8. In the drilling method shown in FIGS. 1 and 2, the dust f1 of the light particles removed from the hole 8 is scattered. Therefore, when performing a drilling operation near a house, the drilling method described below is used. adopt.

In the drilling method shown in FIG. 3, a closed structure capable of trapping dust f removed from the hole 8 is used as the cylindrical weir 20. The illustrated cylindrical weir 20 includes a cylindrical body 21 inserted into the hole 8 and a lid 30 that seals an upper end opening of the cylindrical body 21. Tubular body 21
Goes around the opening edge of the opening 7 of the hole 8, and the upper half protrudes from the ground surface 6.

On the outer peripheral surface of the cylindrical body 21, a discharge port 22 communicating with the discharge pipe 17 and a window hole 23 closed by a transparent window plate 24 are formed. The discharge port 22 is for discharging the dust f trapped in the cylindrical weir 20 to the outside by the discharge pipe 17. The window hole 23 is for observing the inside of the tubular body 21 by removing the window plate 24. A nozzle 15 is provided inside the tubular body 21, and compressed air supplied from the air compressor 14 is supplied to the nozzle 15.
The dust f discharged from the hole 8
To the discharge port 22. At the upper end opening of the cylindrical body 21, there is provided a receiving metal 26 which goes around the inner peripheral surface of the cylindrical body 21, and the lid 30 is supported by the receiving metal 26, and the lid 30 is screwed by the screw 27. It is fixed to the tubular body 21.

The lid 30 has a circular upper plate 31 and a lower plate 32.
And a ring-shaped plug 34 sandwiched between the upper plate 31 and the lower plate 32. A circular hole 31 through which the rod 2 of the punching device is inserted
a and 32b are respectively opened. The plug 34 is made of rubber, synthetic resin, or the like. The inner peripheral surface 35 of the plug 34 contacts the outer peripheral surface of the rod 2 to such an extent that the vertical movement and rotation of the rod 2 are not hindered, and the cylindrical weir 20 is closed. It is set to a closed state. The lid 30 of this embodiment has a split structure, and as shown in FIG. 4, a pair of lid members 30a and 30b are abutted against each other to form a cylindrical shape with the rod 2 of the punching device inserted. The body 21 can be covered.

The dust f trapped in the cylindrical weir 20 is
Dust is collected from the discharge pipe 17 through the hose 18 and the conduit 16 shown in FIG. In order to facilitate collection of the dust f in the dust collection box 13, the conduit 16 is provided with a water sprinkling section 91 for spraying the water f pumped from the water storage tank 90 by the pump P and spraying the dust f. ,
In order to prevent the aggregated dust from accumulating in the conduit 16, the conduit 1
An air compressor 14 for sending compressed air into the inside 6 is connected. In addition, 19 in the figure is an exhaust pipe provided in the dust collection box 13.

For example, when a drilling operation is performed in a place having a height difference, the dust collection box 13 and the water storage tank 90 cannot be arranged near the cylindrical weir 20.
Is extended to a flat ground, and the end thereof is connected to the dust collection box 13. However, when drilling is performed on a flat ground or a place where a work place is wide, as shown by a chain line in FIG. Alternatively, the dust collection box 13 may be provided near the cylindrical weir 20.

In the embodiment described above, the cylindrical weir 20 is formed in a closed structure in order to prevent scattering of the dust f. However, as in the embodiment shown in FIG. Even if the cylindrical weir 40 is not closed and the cylindrical weir 40 is covered with a case body 44 having a closed structure, scattering of dust can be prevented. The cylindrical weir 40 of this embodiment is composed of a cylindrical part 42 inserted into the hole 8 and an inclined part 41 that goes around the opening edge of the hole 8 and protrudes from the ground surface 6. The upper end of the shape 41 is an opening 41a. In addition,
In this embodiment, the protruding portion of the cylindrical weir 40 from the ground surface 6, that is, the inclined portion 41 is formed in the shape of a weight, but is not limited thereto, and may be formed in a cylindrical shape.

The case body 44 integrally includes a cylindrical wall 45, a cover plate 50, and a ring-shaped bottom plate 46, and the bottom plate 46 and the cylindrical weir 40 are integrated by bolts 58. Case body 4
Although not shown, a discharge port for discharging dust to the outside is provided in the cylindrical wall 45 of 4, and a discharge pipe communicates with the discharge port.

The cover plate 50 has a housing portion 52 for housing a ring-shaped plug 54, and the outer peripheral edge and the upper end edge of the cylindrical wall 45 are integrated by screws 27. The plug 54 is made of rubber, a synthetic resin material, or the like.
And makes the inside of the case body 44 hermetically sealed.
The lid plate 50 also has a split structure similar to the lid 30 shown in FIG. It is preferable that a window hole for scraping out dust accumulated on the bottom plate 46 be formed in the cylindrical wall 45 of the case body 44 in addition to a discharge port through which a discharge pipe is communicated.

FIG. 6 shows an embodiment in which the discharged dust does not accumulate in the case body 44. The cylindrical weir 40 of this embodiment has an open upper end, and dust is discharged from the opening 41. The case body 44 is provided with a dust discharge port 22 at a position below the cylindrical wall 45. A spiral inclined floor 48 orbiting around the cylindrical weir 40 is provided inside the case body 44. This inclined floor 48
The dust discharged into the case body 44
The upper end of the inclined floor 48 is located near the opening 41 of the cylindrical weir 40, and the lower end communicates with the discharge port 22. Therefore, when the dust discharged from the opening 41 of the cylindrical weir 40 accumulates on the inclined floor 48, the deposit is formed on the inclined floor 4.
It slides down along 8 and is guided to the outlet 22.

FIG. 7 shows a state in which a lid 60 having a valve mechanism 65 is provided inside the cylindrical weir 20 of the embodiment shown in FIG. The lid 60 in the illustrated example is a ring-shaped disk having an opening 60a through which the rod 2 is inserted at the center position, and a plurality of circular holes 61 are formed around the opening 60a.

An opening / closing valve 66 constituting a valve mechanism 65 is attached to each circular hole 61. Each of the on-off valves 66 is opened by the pressure of the compressed air exhausted from the down-the-hole drill, and the discharge of the dust from the hole 8 is allowed. The on-off valve 66 closes and prevents the dust from returning to the hole 8. Note that the installation position of the lid body 60 does not need to be adjusted to the height of the ground surface 6 as in the illustrated example, and may be close to the height of the discharge port 22 as shown by a dashed line.

FIG. 8 shows a configuration in which a lid 60 having a valve mechanism 65 is directly provided in the opening 7 of the hole 8, and the lid 60 is covered with a case 44. The valve mechanism 65 of this embodiment is also similar to the embodiment of FIG. 7 in that the on-off valves 66 are attached to a plurality of circular holes 61 formed in the lid 60, respectively. Although the extraction of the dust is permitted, the return of the dust to the hole 8 is prevented.

The case body 44 is provided with an intake 76 communicating with the discharge pipe 75, and the dust is discharged from the intake 76 to the outside. The hose 18 is connected to the discharge pipe 75,
The dust is led to a dust collection box (not shown) via the hose 18. Regarding the dust accumulated in the case body 44,
The cover plate 71 of the scraper 70 opened in the case body 44 is opened and removed.

[0031]

As described above, according to the present invention, when digging a hole, a cylindrical weir is provided at an opening to the ground surface of the hole along the opening edge and projecting from the ground surface. Because the dust removed from the hole does not return to the inside of the hole, even if dust or mud accumulates around the opening of the hole,
The tubular weir prevents the sediment from returning to the hole and does not hinder the drilling operation.

According to the second aspect of the present invention, the cylindrical weir is a closed structure, and the dust discharge pipe communicates with the cylindrical weir, so that the dust removed from the hole is scattered around. There is no.

According to the third aspect of the present invention, since the cylindrical weir having the opening is covered with the case having the outlet, the dust removed from the hole does not scatter to the periphery.

According to the fourth aspect of the present invention, when digging a hole, a valve mechanism that allows the opening of the hole to the ground surface to allow the extraction of dust from the hole but prevents the dust from returning to the hole. Since the dust removed from the hole is set not to return to the inside of the hole by closing with the lid, the dust that has accumulated around the opening of the hole is prevented from returning to the hole, and there is a possibility that drilling may be hindered. Absent.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a drilling method according to the present invention.

FIG. 2 is a cross-sectional view showing another drilling method of the present invention.

FIG. 3 is a cross-sectional view showing a drilling method in consideration of dust scattering prevention.

FIG. 4 is a plan view showing a dust collection path.

FIG. 5 is a cross-sectional view showing another perforation method in consideration of dust scattering prevention.

FIG. 6 is a sectional view showing another perforation method in consideration of prevention of scattering of dust.

FIG. 7 is a cross-sectional view showing another perforation method in consideration of prevention of scattering of dust.

FIG. 8 is a cross-sectional view showing another drilling method in consideration of prevention of scattering of dust.

FIG. 9 is an explanatory view showing a conventional drilling method.

[Explanation of symbols]

 3 Down the hole drill 6 Ground surface 8 Hole 17 Discharge pipe 20, 40, 100 Cylindrical weir 22 Discharge port 41, 41a Opening 44 Case body 60, 105 Lid 65, 106 Valve mechanism f, f1, f2 Dust

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Kazuaki Yonemaru 17-38, Miyanoshita-cho, Hirakata-shi, Osaka Inside Soilte Kuno Co., Ltd. (72) Mamoru Oeda 197-1, Nishirodai, Sakai-shi, Osaka F-term in Oeda Construction Machinery Industry (reference) 2D065 CA05 3C069 AA04 BA09 CA01 DA07 EA01

Claims (4)

[Claims] 1. A method for drilling a surface of a bedrock or the like with a drill for drilling, and applying compressed air to a drilling location.
A drilling method for rocks and the like that excavates a hole to a predetermined depth in the ground while excluding dust generated during drilling to the outside of the hole.When digging a hole, the hole is opened at the opening on the ground surface. By installing a cylindrical weir that goes around the edge and protrudes from the ground surface, the dust removed from the hole is set so that it does not return to the inside of the hole, and the drilling is advanced. Perforation method. 2. The cylindrical weir is a hermetically sealed structure capable of trapping dust generated at the time of perforation, and having a dust discharge pipe communicated with the cylindrical weir. The drilling method for rock or the like according to claim 1, wherein the trapped dust is guided to the outside by the discharge pipe and collected. 3. The cylindrical weir has an opening, and the cylindrical weir is covered with a case body having a discharge port, so that the dust discharged into the case body from the opening of the cylindrical weir is discharged. The method for piercing rock or the like according to claim 1, wherein the hole is collected outside from an exit. 4. Drilling a surface of a bedrock or the like with a drill for drilling, and applying compressed air to a drilled portion,
This is a drilling method for rocks and the like that excavates a hole to a predetermined depth in the ground while excluding dust generated during drilling to the outside of the hole.When digging a hole, the opening to the ground surface of the hole is removed from the hole. To prevent dust returning to the hole, but to prevent the dust from returning to the hole, close the lid with a valve mechanism that prevents the dust removed from the hole from returning to the inside of the hole. Drilling method for rock etc.