KR100683021B1 - Large Diameter Ground Excavation Apparatus and Method - Google Patents

Abstract

The present invention relates to a large-diameter ground drilling apparatus and method, the large-diameter ground drilling equipment and method according to the present invention in the ground drilling equipment for drilling ground using a hammer drill, is connected to the output shaft of the drill machine (5), A plurality of hammer drill pneumatic passages 31 for receiving the pneumatic pressure supplied from the hammer drill air compressor 8 and the pneumatic passages 32 for receiving pneumatic pressure supplied from the air compressor 9 for discharging. A multi-tube air distributor swivel (4) having a plurality of circumferentially formed and a slime discharge hole (33) formed at the center thereof; Stabilizer 2; An air supply pipe 41; Cylindrical hammer case 1; A guide hole is installed at the center of the cylindrical hammer case (1) and protrudes downwardly below the bottom of the multi-hammer drill (44), and a slime suction hole (47) is formed at the center to discharge the slime through the discharge pipe (51). A guide guide portion 11 having a width of 12 as a diameter; The hammer case 1 is formed with the same number of small hammer drills 44 in the circumferential direction as the number of air supply pipes 41 subjected to pneumatic pressure by the air drill 8 for hammer drills. The hammer hammer air passage 45 and the clay air passage 46, which are subjected to pneumatic pressure by the clay air compressor 9, communicate with the clay pipe 51 to blow air upward. A multi-hammer drill apparatus 10 and a dust collector 7 configured to be capable of being made; It relates to a large-diameter ground drilling apparatus and a ground drilling method using the same, characterized in that configured to include.

Large diameter ground excavation device and method according to the present invention can be maintained more precisely the perforation perpendicularity by the guide guide portion, as the excavation speed is significantly improved compared to the case of using a single hammer drill or a multi-hammer drill alone It has the effect of improving the overall mechanical performance, and it is possible to identify the malfunction of the small hammer drill when one small hammer drill has an operation error or leaks of pneumatic pressure. It can reduce the noise and vibration problems generated during the work, and by reducing the slime process, dust is reduced to prevent civil complaints in advance, and it is possible to reduce the weight and simplify the combination of equipment.

Multi hammer drill, ground excavation device, guide guide

Description

Large-caliber excavator for excavating ground and method

1 is a front view of the ground excavation device of the present invention.

2 is an explanatory view showing a state in which the guide guide portion of the ground excavation device of the present invention is inserted into the primary perforated guide hole.

Figure 3 (a) is a side view showing a multi-pipe air distributor swivel of the present invention, (b) is a cross-sectional view of the multi-pipe air distributor swivel of the present invention.

Figure 4 is a cross-sectional view showing the configuration of the hammer rod, stabilizer and multi-hammer drill apparatus of the present invention.

5 is a cross-sectional view taken along the line A-A of FIG.

6 is a bottom view showing the configuration of a small hammer drill of the multi-hammer drill apparatus of the present invention.

7 is a cross-sectional view showing a pneumatic injection method of the multi-hammer device of the present invention.

8 is a cross-sectional view showing a pneumatic injection method of a conventional multihammer device.

9 is a front view of a conventional ground excavation device.

* Explanation of symbols for main parts of the drawings

1: Hammer Case 2: Stabilizer

3: hammer rod 4: multi-pipe air swivel

5: drill machine 6: perforated outer wall casing

7: dust collector 8: hammer compressor air compressor

9: air compressor for the top 10: multi-hammer drill device

11: guide portion 12: guide hole

21 ~ 26: Pneumatic inlet

31: Pneumatic passage for hammer drill 32: Pneumatic passage for topdressing

33: slime discharge hole 41: air supply pipe

44: small hammer drill 45: air passage for hammer drill

46: air passage for the topsoil 47: slime suction hole

48: pneumatic jet hole 49: sleeve device

51: excavation pipe 52: multi-hammer housing

The present invention relates to a large-diameter ground excavation device and method improved by the reverse circulation drilling (RCD) method used in the excavation work of the ground.

In general, during the foundation work such as civil engineering or construction work, work is performed to prevent settlement of the ground so that the building built on the ground can be firmly located. Work or drilling will be done.

Ground excavation apparatus used to excavate the ground is equipment for excavating the ground to install the foundation, such as piles that mainly support all the constructions built on the ground, as shown in Figure 9, the ground excavation equipment is a crawler driving device ( 90) and a leader 91 attached to the front support arm 92 and a drill machine 93 installed at an upper portion of the leader to move up and down, wherein the hammer rod 94 is assembled in a multi-stage downward direction. Moreover, the hammer 95 which excavates the ground is attached to the lowest end side of the hammer rod assembled in multiple stages.

Large diameter ground excavation device is a device for excavating a large diameter drilling hole using a multi-hammer drill device that combines a large diameter of a single body, a large weight of a hammer drill and a small hammer drill of a small diameter. However, when drilling a large diameter drilling hole using a multi-hammer drill device, there is a problem that the excavation speed is significantly lower than that of a large diameter single hammer drill device, and when a rock layer buried in the ground is inclined while excavating the ground. There is a problem in that one side of the drill bit is in contact with the inclined rock layer is subjected to partial pressure, and due to this biasing action it is impossible to excavate the rock layer vertically.

In addition, as a means for driving a hammer, an air hammer using high pressure compressed air is mainly used in recent years. As illustrated in FIG. 8, only one pneumatic induction pipe for supplying pneumatic pressure to a hammer drill is installed inside the hammer rod, and the pneumatic pressure is used. The pneumatic pressure injected into the inlet 81 is distributed to each small hammer drill in the chamber 82 of the hammer case through a pneumatic induction pipe and discharged to the outside 84 through the outer wall space 83 of the hammer case. In the case of supplying pneumatic pressure to a multi-hammer drill device combined with a plurality of small hammer drills, any one of the small hammer drills cannot be detected even if a failure occurs. There was no solution to the treatment of slime such as sand or dust.

The present invention has been made to solve the conventional problems as described above, an object of the present invention is to guide the central portion of the hammer case to improve the drilling speed and drilling verticality of the ground drilling apparatus using a multi-hammer drill device It is to provide a large diameter ground excavation device and method that can be installed, and can easily detect the failure of the multi-hammer drill device.

In order to achieve the above object, the present invention is ground excavation apparatus for excavating the ground using a hammer drill,

It is connected to the output shaft of the drill machine (5), and is supplied from a plurality of hammer drill pneumatic passages (31) and topsoil compressor (9) for receiving the pneumatic pressure supplied from the air compressor (8) for hammer drill in a separate manner A multi-pipe air distributor swivel (4) formed with a plurality of pneumatic passages (32) for discharging pneumatic air supplied in the circumferential direction, and forming a slime discharge hole (33) at its center;

A stabilizer (2) connected between a multi-pipe air distributor swivel (4) and a lowermost hammer rod of a hammer rod (3) connected to the multi-pipe air distributor swivel and assembled in multiple stages;

It is installed in the circumferential direction centering on the discharging pipe 51 and the discharging pipe 51 installed in the inner center of the hammer rod to communicate with each of the pneumatic passages 31 and 32 of the multi-pipe air distributor swivel 4 separately. An air supply pipe 41;

A cylindrical hammer case (1) positioned below the lowermost hammer rod and having a discharging pipe (51) at its center;

A guide hole is installed at the center of the cylindrical hammer case (1) and protrudes downwardly below the bottom of the multi-hammer drill (44), and a slime suction hole (47) is formed at the center to discharge the slime through the discharge pipe (51). A guide guide portion 11 having a width of 12 as a diameter;

The hammer case 1 is formed with the same number of small hammer drills 44 in the circumferential direction as the number of air supply pipes 41 subjected to pneumatic pressure by the air drill 8 for hammer drills. The hammer hammer air passage 45 and the clay air passage 46, which are subjected to pneumatic pressure by the clay air compressor 9, communicate with the clay pipe 51 to blow air upward. Multi-hammer drill device 10 configured to be made;

A dust collecting device (7) for collecting the sucked soil or dust by suctioning the slime generated by excavating with the multi-hammer drill device (10) into the discharge pipe;

Characterized in large diameter ground drilling equipment, characterized in that configured to include.

In addition, the present invention in the method of excavating the ground with a ground excavation device,

First drilling a small hole guide hole 12 using a small diameter drilling device having a single hammer drill for small diameter drilling;

Remove the excavation device having a single hammer drill for small diameter excavation from the ground excavation device, and equipped with a multi-pipe air distributor swivel (20) and stabilizer (2) and a multi-hammer drill device under the hammer rod (3) 10) and the large-diameter excavation device including the guide guide portion 11 to the ground excavation device, and then inserting the guide guide portion 11 into the guide hole 12 of the first hole is small diameter;

The pneumatic pressure supplied from the hammer drill air compressor 8 is supplied to the multi-hammer drill device 10 independently through the pneumatic passage 31 for the hammer drill of the multi-pipe air distributor swivel 2 to provide a number of small Simultaneously actuating the hammer drill 44;

Removing the cross section of the groove shape by performing the downward excavation operation of the multi-hammer drill apparatus 10 to the lowest end surface of the guide hole 12 by the sleeve 49 of the guide guide portion 11;

By receiving the pneumatic pressure supplied from the air compressor (9) for discharging and ejecting the pneumatic pressure directly to the upper side of the discharging pipe through the discharging air passage 46 to discharge the slime generated by hitting the multi-hammer drill device (10) Collecting dust in the dust collecting apparatus 7;

Characterized in large diameter ground excavation method comprising a.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a front view of the ground excavation device of the present invention, Figure 2 is an explanatory view showing a state in which the guide guide portion of the ground excavation device of the present invention is inserted into the primary perforated guide hole, as shown,

The ground excavation device according to the present invention is assembled in multiple stages inside the drill machine 5 and the multi-pipe air distributor swivel 4 connected to the bottom of the drill machine and the perforated outer wall casing 6 erected by the support arm and the leader. It consists of a hammer case (1) including a hammer rod (3), stabilizer (2), guide guide portion (11) and a multi-hammer drill device (10), the multi-pipe air distributor swivel (4) The air compressor 8 and the air discharge compressor 9 for discharge are connected, and the dust collecting apparatus 7 which collects slime is connected to the discharge pipe 51 in a hammer rod. The drill machine (5) is a known device consisting of a motor and a planetary gear reducer, one power unit or two power units may be used, and the hammer rod (3) assembled in multiple stages at the bottom of the drill machine (5) ) Rotate it.

Figure 3 shows a multi-pipe air distributor swivel of the present invention, the multi-pipe air distributor swivel (4) is connected to the output shaft of the drill machine 5, the pneumatic pressure supplied from the air compressor 8 for hammer drill The pneumatic passage for the soil that is supplied through the pneumatic inlet 26 through the pneumatic passage 31 for the hammer drill and the air compressor 9 for the soil discharging which are individually supplied through the pneumatic inlet 21-25. Many 32 are formed in the circumferential direction, and the slime discharge hole 33 is formed in the center. As one embodiment, it is preferable that one of the six pneumatic passages is a pneumatic passage 32 for discharging and the other is a pneumatic passage 31 for hammer drills.

Figure 4 is a cross-sectional view showing the configuration of the hammer rod, stabilizer and multi-hammer drill device of the present invention, the stabilizer 2 is connected to the multi-pipe air distributor swivel (4) and the multi-pipe air distributor swivel assembled in multiple stages Assembled between the lowermost hammer rod of the hammer rod (3), the cylindrical hammer case 1 is coupled to the lower portion of the lower hammer rod by a connecting flange 42, the discharge pipe 51 is formed at the center thereof And a multi hammer drill apparatus 10 including a plurality of hammers 43.

The multi-hammer drill apparatus 10 forms the same number of small hammer drills 44 in the circumferential direction, the same number as the number of the air supply pipe 41 to be pneumatic by the air compressor (8) for the hammer drill and each small hammer drill An independent hammer drill air passage 45 for supplying air pressure to the 44 and an air discharge passage 46 for receiving air pressure by the air discharge compressor 9 are in communication with the discharge pipe 51 and pneumatically upward. It is configured to eject a.

Therefore, the independent pneumatic passage can supply air pressure to each of the small hammer drills of the multi-hammer drill device, so if a single hammer drill malfunctions or leaks, the small hammer drill in real time through the pneumatic gauge of the air compressor. It is possible to find out whether there is a malfunction.

In addition, since the air discharge passage 46 for receiving pneumatic pressure by the air discharging air compressor 9 is configured to communicate with the discharge pipe 51 to eject the air pressure upwards, the discharge pipe 51 has a slime. The strong suction force that can be inhaled is applied, and the air that is ejected through the pneumatic jet hole 49 formed in the bottom of the small hammer drill is sucked into the discharging pipe more easily through the slime suction hole of the guide guide part together with the slime. May be discharged.

The guide guide part 11 of the present invention is for preventing the case where the drilling direction is separated from the vertical by the eccentricity during the large diameter excavation work, the width of the guide hole 12 as the diameter but the center of the cylindrical hammer case (1) The slime suction hole 47 is installed at the bottom of the multi-hammer drill 44 so as to be discharged through the discharge pipe 51 and is formed at the center of the guide guide part. The slime suction hole 47 may be preferably formed in one or more as necessary.

In addition, the guide guide portion 11 is formed with a sleeve device 49 coupled to the outer circumference of the shaft of the guide guide portion at the upper portion, the downward drilling of the multi-hammer drill apparatus 10 to the lowest end surface of the guide hole 12 When the operation is in progress, the protruding guide guide portion allows the multi-hammer drill apparatus to continue the excavation operation by the sleeve device so that the groove-shaped cross section formed at the lower end surface is removed.

FIG. 5 is a cross-sectional view taken along line AA of FIG. 4, wherein the pneumatic passages of the multi-pipe air distributor swivel 4 are installed in the circumferential direction around the discharge pipe 51 installed at the inner center of the hammer rod and the discharge pipe 51. The air supply pipe 41 which communicates with the fields 31 and 32 individually is formed. Pneumatic pressure supplied from the air compressor passes through the air supply pipe 41 of the hammer rod which is connected to the pneumatic passages 31 and 32 in multiple stages, and a part thereof is ejected into the air passage for discharging, and the rest is used as an air passage for hammer drill. It is supplied to each of a plurality of small hammer drills constituting the drill device.

Fig. 6 is a bottom view showing the configuration of the small hammer drill of the multi-hammer drill apparatus of the present invention, in which a plurality of small hammer drills 44 are arranged in the circumferential direction of the multi-hammer housing 52 of the present invention. The drill 44 is preferably triangular in shape. As an embodiment of the present invention, the multi-hammer drill device is composed of five small hammer drills, but the number of small hammer drills can be appropriately adjusted as necessary. The triangular hammer drill of the present invention has the advantage of being able to use expensive hammer drills for a long time by rotating and reusing the circumferential outer surface when the circumferential outer surface is worn out as the excavation work proceeds.

In the center of the small hammer drill 44 is formed a pneumatic jet hole 49 through which air pressure is ejected through the air passage, and the air ejected through the pneumatic jet hole is excavated by the multi-hammer drill device To discharge to the discharge pipe 51 (see Fig. 7).

It will be described a method of proceeding the excavation work with the ground excavation device of the present invention having the configuration as described above.

The first step of excavating the ground with the ground drilling device of the present invention. After the perforated outer wall casing is installed, a small diameter drilling rig having a single hammer drill for small diameter drilling is firstly drilled.

In the case of the conventional multi-drill drill device and RCD drilling method, since the excavation speed of the ground excavation device had a low difficulty of maintaining the verticality, in order to improve the present invention, the single hammer commonly used before digging with the multi-hammer drill device Drilling device is used to drill small diameter guide holes and to drill with a second multi-drill drill device.

However, the excavation from the ground surface to the weathered rock may be excavated using a screw, which is a well-known excavation device, and the excavation may be easily performed by a person skilled in the art to which the present invention pertains. .

After drilling the first single hammer drill, according to the second multi-hammer drill drilling method, the excavation device having the small-diameter excavation single hammer drill is removed from the ground excavation device, and the multi-pipe air distributor swivel 20 and stabilizer (2) and the large diameter drilling rig of the present invention including a multi-hammer drill device 10 and a guide guide portion 11 in the lower portion of the hammer rod (3) to the ground excavation device, and then the first drilled small The guide guide portion 11 is inserted into the guide hole 12 having a diameter.

Then, the pneumatic pressure supplied from the hammer drill air compressor (8) is supplied to the multi-hammer drill device 10 in an independent manner through the pneumatic passage 31 for the hammer drill of the multi-pipe air distributor swivel (2). A plurality of small hammer drill 44 is hit at the same time, the drilling continues to the lowest end of the guide hole. If the outer circumferential side of the triangular hammer drill wears out, the excavation work continues by rotating to the unworn side.

A groove-shaped cross section is allowed to proceed downward drilling of the multi-hammer drill apparatus 10 to the lowest end surface of the guide hole 12 by the sleeve 49 of the protruding guide guide portion 11 reaching the lowest end surface of the guide hole. Is removed.

The slime generated during the excavation operation by hitting the multi-hammer drill device 10 is carried out through the pneumatic jet hole 49 of the small hammer drill in which air is used for pneumatic formation for the operation of the small hammer drill 44. After ejected, the slime is discharged to the discharging pipe 51 through the slime suction hole 47 of the guide guide part 11 along with the slime along the slime discharge path as shown in FIG. 7. At this time, in order to further promote the discharge action of the slime through the discharge pipe is supplied with a pneumatic pressure supplied from the air compressor (9) for discharging the pneumatic pressure directly to the upward side of the discharging pipe through the discharge air passage 46. In this way, when the air pressure is ejected upward, negative pressure is generated on the lower side, thereby promoting the discharge of the slime. The discharged slime can be collected in the dust collector 7 on the ground, so that the slime generated by the excavation work can be collected in the dust collector so as not to be scattered around the work site. Can be prevented in advance.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

As described in detail above, the present invention can more accurately maintain the perforation perpendicularity by the guide guide portion, the overall mechanical performance as the excavation speed is significantly improved compared to the case of using a single hammer drill or a multi-hammer drill alone This has the effect of being improved. In addition, the present invention is to supply the pneumatic pressure to each of the small hammer drill of the multi-hammer drill device through an independent pneumatic passage, when one of the small hammer drill operation error or leakage of pneumatic small in real time through the pneumatic measuring system of the air compressor It can identify the malfunction of the hammer drill and also reduce the noise and vibration problems caused by excavation work by the large-diameter single-diameter drill device, and reduce the slime by simplifying the slime process. It can be prevented in advance, and it has the effect of enabling lightweight and simplified equipment combinations.

Claims (4)

delete In the ground excavation device for drilling the ground using a hammer drill, It is connected to the output shaft of the drill machine (5), which is supplied from a plurality of hammer drill pneumatic passages 31 and topsoil air compressor (9) for receiving the pneumatic pressure supplied from the air compressor (8) for hammer drill in a separate manner A multi-pipe air distributor swivel (4) having a plurality of pneumatic passages (32) for supplying pneumatic pressure in the circumferential direction, and forming a slime discharge hole (33) at its center; A stabilizer (2) connected between the multi-pipe air distributor swivel (4) and the lowermost hammer rod of the hammer rod (3) assembled in multiple stages connected to the multi-pipe air distributor swivel (4); It is installed in the circumferential direction centering on the discharging pipe 51 and the discharging pipe 51 which are installed in the inner center of the hammer rod, and is separately from each of the pneumatic passages 31 and 32 of the multi-pipe air distributor swivel 4. An air supply pipe 41 in communication; A cylindrical hammer case (1) positioned below the lowermost hammer rod and provided with the discharging pipe (51) at its center; Installed in the center of the cylindrical hammer case (1) and protrudes downwardly below the bottom of the small hammer drill 44, a slime suction hole 47 is formed in the center so that the slime is discharged through the discharge pipe (51) A guide guide portion 11 having a width of the guide hole 12 as a diameter; The hammer case (1) is formed in the circumferential direction of the small hammer drill 44 of the same number as the number of the air supply pipe 41 to be pneumatic by the air compressor (8) for the hammer drill, An independent hammer drill air passage 45 for supplying pneumatic pressure to each of the drills 44 and the air discharge passage 46 for receiving air by the air discharge compressor 9 for discharge are connected to the discharge pipe 51. Multi-hammer drill device 10 configured to eject the air pressure through the upward; And a dust collecting device (7) for collecting the suction or dust collected by sucking the slime generated by excavating with the multi-hammer drill device (10) to the discharging pipe (51), A sleeve device (49) is formed on the guide guide portion (11), and the small hammer drill (44) is a large-diameter ground drilling equipment, characterized in that the triangular shape. A method of excavating the ground with a ground excavation device, the method comprising: first drilling a small hole diameter guide hole (12) using a small diameter excavation device having a single hammer drill for small diameter excavation; Remove the excavation device having a single hammer drill for small diameter excavation from the ground excavation device, and equipped with a multi-pipe air distributor swivel (20) and stabilizer (2) and a multi-hammer drill device under the hammer rod (3) 10) and the large-diameter excavation device including the guide guide portion 11 to the ground excavation device, and then inserting the guide guide portion 11 into the guide hole 12 of the first hole is small diameter; The pneumatic pressure supplied from the hammer drill air compressor 8 is supplied to the multi-hammer drill device 10 independently through the pneumatic passage 31 for the hammer drill of the multi-pipe air distributor swivel 2 to provide a number of small Simultaneously actuating the hammer drill 44; Removing the cross section of the groove shape by performing the downward excavation operation of the multi-hammer drill apparatus 10 to the lowest end surface of the guide hole 12 by the sleeve 49 of the guide guide portion 11; By receiving the pneumatic pressure supplied from the air compressor (9) for discharging and ejecting the pneumatic pressure directly to the upper side of the discharging pipe through the discharging air passage 46 to discharge the slime generated by hitting the multi-hammer drill device (10) Collecting dust in the dust collecting apparatus 7; Large diameter ground excavation method comprising a. 4. The large diameter ground according to claim 3, wherein the slime formed by excavation by the multi hammer drill apparatus 10 is discharged to the discharging pipe 51 through the slime suction hole 47 of the guide guide portion 11. Excavation method.

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