WO2007052857A1

WO2007052857A1 - Auger boring machine having vibrator and boring method using the same

Info

Publication number: WO2007052857A1
Application number: PCT/KR2005/003976
Authority: WO
Inventors: Youn-Suk Cha
Original assignee: Kyung In Co., Ltd.
Priority date: 2005-11-03
Filing date: 2005-11-24
Publication date: 2007-05-10
Also published as: KR100591288B1

Abstract

Disclosed herein is an auger boring machine having a vibrator. The auger boring machine of the present invention includes a guide unit (10), a vibro-unit (20), a casing (30) and an auger (40). The guide unit (10) includes a roller (12), which contacts a guide (3), and a mounting plate (14), which has mounting holes (13) therethrough. The vibro-unit (20) includes first and second vibrators (23) and (24) which are mounted to the mounting plate (14). A casing clamp (22) is provided under a lower end of each vibrator. The casing (30) has holding parts (31) coupled to the casing clamps (22). The auger (40) is coupled to an auger drive unit (4). A screw blade (41) is provided on an outer surface of the auger (40). The outer edge of the screw blade (41) is spaced apart from the inner surface of the casing (30) by a predetermined distance.

Description

AUGER BORING MACHINE HAVING VIBRATOR AND BORING METHOD USING THE SAME

Technical Field

[1] The present invention relates, in general, to auger boring machines used for boring holes in the ground and, more particularly, to an auger boring machine which uses a vibrator when performing auger boring work for boring a hole in the ground.

Background Art

[2] Generally, an auger boring machine to be used for boring a hole in the ground has the following construction.

[3] The conventional auger boring machine includes an auger drive unit which is provided at an upper position thereof and rotates an auger for boring in the ground. The auger boring machine further includes a casing drive unit which is provided below the auger drive unit and rotates a casing.

[4] When the auger is rotated by the auger drive unit, the casing is also rotated. At the same time, the auger and the casing are moved downwards together. Thereby, the auger boring machine bores in the ground using the rotating force and the weight of the auger and the casing. At this time, to ensure straightness of the boring work, the casing must be set such that the center thereof is precisely aligned with a desired position during the boring work.

[5] After the boring work has been completed, the auger is removed from the ground.

Thereafter, a steel skeleton structure is installed in the hole bored in the ground, and concrete is charged in the hole, thus forming a pillar in the ground.

[6] Subsequently, the case is removed from the ground by reversely rotating it.

[7] However, the conventional auger boring machine is disadvantageous in that the stability of the auger boring machine is compromised by the heavy casing drive unit which rotates the casing. To mitigate the above-mentioned problem, the auger boring machine must be increased in size.

[8] Furthermore, the conventional auger boring machine has a disadvantage in that, because the straightness of the hole to be bored depends on the alignment of the center of the casing, as the casing and the auger are advanced downwards, the straightness is decreased. As well, because the casing is reversely rotated when it is removed from the ground, reinforcements installed in concrete may be undesirably twisted.

[9] In addition, when it is desired to form a hole having a large diameter in the ground, the auger drive unit and the casing drive unit must be replaced with larger ones. Disclosure of Invention Technical Problem

[10] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide an auger boring machine in which relatively small vibrators, constituting a vibro-unit, are provided at opposite positions on an upper end of a casing, so that the weight of the vibro-unit is reduced, thus increasing the stability of boring work, and in which a plurality of rollers is provided on a mounting plate, to which the vibro-unit is mounted, so that the effect of vibration of the vibro-unit on the auger boring machine is minimized, and straight motion of the casing can be ensured without having an effect on the vibration of the vibro-unit, thus ensuring the stability of boring work of the casing, and a boring method using the auger boring machine.

[11] Another object of the present invention is to provide an auger boring machine which performs boring work using the vibro-unit after auger boring work has started, so that the auger boring machine can form a deep hole in general ground as well as in soft ground, and in which the casing is removed by vertical movement thereof but not by rotation, thus preventing reinforcements installed in concrete from being twisted, thereby enabling setting of a strong pillar, and in which, because the mounting plate, to which the vibrators of the vibro-unit are mounted, has a plurality of mounting holes, the casing having various diameters can be coupled to the vibro-unit, so that the auger boring machine can bore holes having various diameters in the ground, and a boring method using the auger boring machine.

[12]

Technical Solution

[13] In order to accomplish the above objects, the present invention provides an auger boring machine for boring in the ground, comprising: a guide unit, including a roller having a concave semi-circular cross-sectional outer surface and contacting a guide provided in a leader of the auger boring machine, and a mounting plate having a plurality of mounting holes therethrough; a vibro-unit, including first and second vibrators mounted to the mounting plate, with a pulley provided on an upper end of each of the first and second vibrators, and a casing clamp provided under a lower end of each of the first and second vibrators; a casing, with holding parts provided on an outer surface of the casing so that the holding parts are coupled to the casing clamps of the vibro-unit; and an auger coupled to an auger drive unit, with a screw blade provided on an outer surface of the auger and having a predetermined diameter such that an outer edge of the screw blade is spaced apart from an inner surface of the casing by a predetermined distance. Advantageous Effects [14] In an auger boring machine of the present invention, relatively small vibrators, constituting a vibro-unit, are provided at opposite positions on an upper end of a casing, so that the weight of the vibro-unit is reduced, thus increasing the stability of boring work. Furthermore, a plurality of rollers is provided on a mounting plate, to which the vibro-unit is mounted, so that the effect of vibration of the vibro-unit on the auger boring machine is minimized, and straight motion of the casing can be ensured without having an effect on the vibration of the vibro-unit, thus ensuring the stability of boring work of the casing.

[15] Moreover, because boring work of the casing using the vibro-unit is performed after auger boring work has started, the auger boring machine can form a deep hole in general ground as well as in soft ground. Furthermore, the casing is removed by vertical movement thereof but not by rotation, thus preventing reinforcements installed in concrete from being twisted, thereby setting a strong pillar. In addition, because the mounting plate, to which the vibrators of the vibro-unit are mounted, has a plurality of mounting holes, casings having various diameters can be coupled to the vibro-unit, so that the auger boring machine can bore holes having various diameters in the ground. Brief Description of the Drawings

[16] FIG. 1 is a side view of an auger boring machine having a vibrator, according to an embodiment of the present invention;

[17] FIG. 2 is a front view of the auger boring machine of FIG. 1 ;

[18] FIG. 3 is a side view showing a vibro-unit of the auger boring machine of FIG. 1 ;

[19] FIG. 4 is a perspective view showing a guide unit of the auger boring machine of

FIG. 1;

[20] FIG. 5 is a view showing positions at which first and second vibrators of the vibro- unit are adjustably mounted to a mounting plate of the auger boring machine of FIG. 1 ;

[21] FIG. 6 is a view showing operation of an auger and a casing of the auger boring machine of FIG. 1 during a boring process;

[22] FIG. 7 is a sectional view showing the auger and the casing of FIG. 6 during the boring process; and

[23] FIG. 8 is a front view corresponding to FIG. 2, but showing an auger boring machine to which only a single vibrator is mounted.

[24]

Best Mode for Carrying Out the Invention

[25] Hereinafter, an embodiment of the present invention will be described in detail with reference to the attached drawings.

[26] FIG. 1 is a side view of an auger boring machine having a vibro-unit 20, according to an embodiment of the present invention. FIG. 2 is a front view of the auger boring machine of the present invention. FlG. 3 is a side view showing the vibro-unit 20 of the auger boring machine of the present invention. FlG. 4 is a perspective view showing a guide unit 10 of the auger boring machine of the present invention. FlG. 5 is a view showing positions at which first and second vibrators 23 and 24 of the vibro- unit 20 are adjustably mounted to a mounting plate 14 of the auger boring machine of the present invention. FlG. 6 is a view showing the operation of an auger 40 and a casing 30 of the auger boring machine during a boring process. FlG. 7 is a sectional view showing the auger 40 and the casing 30 during the boring process. FlG. 8 is a front view corresponding to FlG. 2, but showing an auger boring machine to which only a single vibrator 25 is mounted.

[27] Referring to FIGS. 1 through 8, the guide unit 10 includes rollers 12, each of which has a concave semi-circular cross-sectional outer surface 11 and which rotatably contact guide rods 3 provided in a leader 2 of the auger boring machine, and the mounting plate 14 which has a plurality of mounting holes 13 so that the vibro-unit 20 is mounted to the mounting plate 14 through the mounting holes 13.

[28] Preferably, the diameter of the concave semi-circular cross-sectional outer surface

11 of each roller 12 is the same as the diameter of each guide rod 3. Furthermore, it is preferable that a large numbers of mounting holes 13 be formed through the mounting plate 14, such that, even if casings 30 having various diameters are used, the vibro-unit 20, which holds holding parts 31 of the casing 30, can be reliably mounted to the mounting plate 14, thus ensuring the straight motion of the casing 30.

[29] The vibro-unit 20 comprises the first and second vibrators 23 and 24. Each of the first and second vibrators 23 and 24 is coupled at a first sidewall thereof to the mounting plate 14. Furthermore, each of the first and second vibrators 23 and 24 includes a pulley 21 on an upper end thereof and a casing clamp 22 under a lower end thereof.

[30] Each casing clamp 22 should have sufficient clamping force to prevent each holding part 31 of the casing 30, clamped by the casing clamp 22, from being removed by vibration of the vibro-unit 20.

[31] Furthermore, the holding parts 31 to be clamped by the casing clamps 22 are provided on the outer surface of the casing 30.

[32] Preferably, each holding part 31 of the casing 30 has an appropriate width such that the casing clamp 22 can securely clamp the holding part 31.

[33] The auger 40 is coupled to an auger drive unit 4 provided in the auger boring machine. A screw blade 41 is provided on the outer surface of the auger 40 and has an appropriate diameter such that the outer edge thereof is spaced apart from the inner surface of the casing 30 by a predetermined distance (d).

[34] It is preferable that the distance (d) between the outer edge of the screw blade 41 of the auger 40 and the inner surface of the casing 30 range from 10 mm to 20 mm.

[35] The operation of the auger boring machine having the above-mentioned construction will be described herein below.

[36] The auger boring machine 50 having the vibrator is moved to a working area in which boring work is required.

[37] Thereafter, a user manipulates a typical operating button (not shown) to operate the auger boring machine.

[38] Then, the auger 40 coupled to the auger drive unit 4 is rotated and is slowly moved downwards, thus performing the boring operation.

[39] Simultaneously, the casing 30 coupled to the vibro-unit 20 bores a hole in the ground using the vibration of the vibro-unit 20 along with the auger 40.

[40] The operation of the auger 40 and the operation of the vibro-unit 20 are simultaneously performed, but the auger 40 first bores a hole in ground while moving downwards, and the casing 30, coupled to the vibro-unit 20, thereafter bores the peripheral part of the hole formed in the ground by the operation of the auger 40.

[41] In detail, when the auger 40 forms the hole in the ground, the peripheral part of the hole, formed in the ground by the boring operation of the auger 40, is changed into soft ground by pressure generated by the boring operation of the auger 40.

[42] The range, within which the peripheral part of the hole formed by the operation of the auger 40 is changed into soft ground, may differ depending on the density of the ground, but, typically, a peripheral part, which is within a range from 10 mm to 20 mm in a radial direction of the hole formed by the boring operation, is changed into soft ground. Then, the part of the ground changed into soft ground can be easily bored by the casing 30 using the vibro-unit 20 under reduced resistance.

[43] At this time, the rollers 12, which have concave semi-circular cross-sectional outer surfaces 11 and move along the guide rod 3 of the leader 2 of the auger boring machine, make it possible for the casing 30 to maintain straight motion thereof. Furthermore, the rollers 12 absorb some of the vibration of the vibro-unit 20, thus ensuring stable boring operation of the auger boring machine. Meanwhile, because the first and second vibrators 23 and 24 of the vibro-unit 20 are mounted to the mounting plate 14 of the guide unit 10, the first and second vibrators 23 and 24 can be level with each other while moving downwards.

[44] After the boring operation has been completed, the auger 40 is rotated in reverse and thus moved upwards. Simultaneously, the casing 30 is also moved upwards.

[45] To form a hole, having a diameter larger than that of the hole formed in the above- mentioned boring operation, in the ground, the auger 40 is removed from the auger drive unit 4, and the holding parts 31 of the casing 30 are released from the clamps 22 of the vibro-unit 20 to remove the casing 30. In addition, the first and second vibrators 23 and 24 of the vibro-unit 20, which have been mounted to the mounting holes 13 of the mounting plate 14, are removed from the mounting plate 14.

[46] Thereafter, another auger 40, having a diameter larger than the diameter of the above-mentioned auger 40, is coupled to the auger driver unit 4. Subsequently, a casing 30, having a diameter such that the outer edge of the screw blade 41 of the auger 40 is spaced apart from the inner surface of the casing 30 by a distance (d) ranging from 10 mm to 20 mm, is coupled to the vibro-unit 20 using the casing clamps 22 of the vibro-unit 20 that hold holding parts 31 of the casing 30.

[47] The first and second vibrators 23 and 24 of the vibro-unit 20 are moved away from each other by a distance, corresponding to the increased length of the diameter of the casing 30, and are mounted to the mounting holes 13 of the mounting plate 14. Of course, the first and second vibrators 23 and 24 must be level with each other, so that, when the boring operation is performed, they are moved downwards while being level with each other.

[48] After the replacement process of the auger 40 and the casing 30 and the width adjustment of the vibro-unit 20 have been finished, the boring process is performed in the same manner as described above.

[49] Meanwhile, as shown in FlG. 8, the vibro-unit 20 may include only a single vibrator

25, and the boring process of this auger boring machine is also performed in the same manner as described above.

[50] The boring method using the auger boring machine having the above-mentioned construction and effect will be described herein below.

[51] The boring method of the present invention includes the step of selecting and mounting a casing and an auger, which have desired diameters, to the auger boring machine, and the step of adjusting the width of the vibro-unit 20 such that the width of the vibro-unit corresponds to the diameter of the casing and mounting the vibro-unit 20 to the mounting holes 13 of the mounting plate 14. The boring method further includes the step of boring in the ground using the rotation of the auger 40 coupled to the auger drive unit 4 and, simultaneously, boring in the ground using vibration of the casing 30 coupled to the vibro-unit 20. The boring method further includes the step of reversely rotating the auger drive unit 4 and removing the auger 40 from the ground after the boring work has been completed, and the step of moving the casing 30 upwards during the removal of the auger 40.

[52]

[53] As describe above, in an auger boring machine of the present invention, relatively small vibrators, constituting a vibro-unit, are provided at opposite positions on an upper end of a casing, so that the weight of the vibro-unit is reduced, thus increasing the stability of boring work. Furthermore, a plurality of rollers is provided on a mounting plate, to which the vibro-unit is mounted, so that the effect of vibration of the vibro-unit on the auger boring machine is minimized, and straight motion of the casing can be ensured without having an effect on the vibration of the vibro-unit, thus ensuring the stability of boring work of the casing.

[54] Moreover, because boring work of the casing using the vibro-unit is performed after auger boring work has started, the auger boring machine can form a deep hole in general ground as well as in soft ground. Furthermore, the casing is removed by vertical movement thereof but not by rotation, thus preventing reinforcements installed in concrete from being twisted, thereby setting a strong pillar. In addition, because the mounting plate, to which the vibrators of the vibro-unit are mounted, has a plurality of mounting holes, casings having various diameters can be coupled to the vibro-unit, so that the auger boring machine can bore holes having various diameters in the ground. Industrial Applicability

[55] As describe above, in an auger boring machine of the present invention, relatively small vibrators, constituting a vibro-unit, are provided at opposite positions on an upper end of a casing, so that the weight of the vibro-unit is reduced, thus increasing the stability of boring work. Furthermore, a plurality of rollers is provided on a mounting plate, to which the vibro-unit is mounted, so that the effect of vibration of the vibro-unit on the auger boring machine is minimized, and straight motion of the casing can be ensured without having an effect on the vibration of the vibro-unit, thus ensuring the stability of boring work of the casing.

[56] Moreover, because boring work of the casing using the vibro-unit is performed after auger boring work has started, the auger boring machine can form a deep hole in general ground as well as in soft ground. Furthermore, the casing is removed by vertical movement thereof but not by rotation, thus preventing reinforcements installed in concrete from being twisted, thereby setting a strong pillar. In addition, because the mounting plate, to which the vibrators of the vibro-unit are mounted, has a plurality of mounting holes, casings having various diameters can be coupled to the vibro-unit, so that the auger boring machine can bore holes having various diameters in the ground.

Claims

[1] An auger boring machine for boring in the ground, comprising: a guide unit, comprising: a roller having a concave semi-circular cross-sectional outer surface and contacting a guide provided in a leader of the auger boring machine; and a mounting plate having a plurality of mounting holes therethrough; a vibro-unit comprising: first and second vibrators mounted to the mounting plate, with a pulley provided on an upper end of each of the first and second vibrators, and a casing clamp provided under a lower end of each of the first and second vibrators; a casing, with holding parts provided on an outer surface of the casing so that the holding parts are coupled to the casing clamps of the vibro-unit; and an auger coupled to an auger drive unit, with a screw blade provided on an outer surface of the auger and having a predetermined diameter such that an outer edge of the screw blade is spaced apart from an inner surface of the casing by a predetermined distance.

[2] The auger boring machine according to claim 1, wherein the vibro-unit comprises a single vibrator.

[3] The auger boring machine according to claim 1, wherein the distance between the inner surface of the casing and the outer edge of the screw blade of the auger ranges from 10 mm to 20 mm.

[4] A boring method using an auger boring machine having an auger, a vibro-unit and a casing, comprising the steps of: selecting and mounting a casing and an auger, having desired diameters, to the auger boring machine; adjusting a width of the vibro-unit such that the width of the vibro-unit corresponds to the diameter of the casing, and mounting the vibro-unit to mounting holes of a mounting plate of the auger boring machine; boring in the ground using rotation of the auger coupled to an auger drive unit and, simultaneously, boring in the ground using vibration of the casing coupled to the vibro-unit; and reversely rotating the auger drive unit to remove the auger from the ground after the boring work has been completed; and moving the casing upwards during the removal of the auger.