JP2974979B2 - Drilling machine and drilling method for deep foundation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical excavation machine for a deep foundation foundation and a method for excavating a vertical hole for use in excavating a vertical hole for a foundation pile of a mountain tower, a bridge or a pier, for example. .

[0002]

2. Description of the Related Art Due to the fact that cast-in-place concrete piles are used to excavate standing holes with a relatively small cross section while protecting the hole walls with a deep foundation method using a deep foundation method, excavation by human power has conventionally been the mainstream. In the department, mechanization has been performed to improve the safety and workability of excavation work.

[0003]

Various improvements have been attempted for the simplification and miniaturization of the structure of the excavating machine used in the above-mentioned deep foundation method. No special improvement has been made in the emission to the public. Therefore, even though the excavator itself has improved excavation performance, the efficiency of excavating earth and sand has not been improved in terms of how efficiently it can be discharged to the ground. Had the problem of not doing so.

The present invention solves the above-mentioned problems by improving both the excavating mechanism and the earth discharging mechanism. The present invention relates to a vertical excavator for a deep foundation, which is compact in its entirety and can obtain high working efficiency. An object of the present invention is to provide a method for excavating a vertical hole.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a vertical excavator for a deep foundation according to the present invention is designed to lift, turn,
A vertical (vertical) screw conveyor device having a width shifting function, an excavating cutter device attached to a tip of the screw conveyor device and having a sediment taking-in function for feeding excavated soil into the screw conveyor device, and the screw conveyor device An excavator body that is provided integrally with the excavator body, the excavator body being suspended from the ground and supported so as to be able to ascend and descend from the ground. It is suspended and supported by a ground-mounted lifting device that operates in conjunction with the lifting, turning, and pulling-up operations of the device.
And an earth discharging bucket for loading earth and sand dropped from the earth and sand hopper device.

Further, according to the vertical hole excavation method of the present invention, a vertical hole bottom is excavated by a drilling cutter device provided at a lower end of a vertical screw conveyor device which is held so as to be able to ascend, descend, swivel, and pull up. After taking the excavated earth and sand into the cutter device, sending it to the screw conveyor device, and from the discharge port of the screw conveyor device, continuously sending the excavated earth and sand to the earth and sand hopper device provided integrally with the conveyor device, It is characterized in that excavation is performed while dropping a predetermined amount into a soil discharging bucket that moves up and down in a vertical hole at regular time intervals.

According to the present invention, while the excavation hole is continuously drilled by the excavation cutter device, the excavated earth and sand is accumulated in the sediment storage hopper device, and the excavated soil is intermittently moved up and down the elevation hole at regular time intervals. It is a thing that throws in earth and sand and loads it.
The excavation work of the vertical hole by the cutter device can be continuously performed even during the lifting and lowering of the earth discharging bucket, and the work of transferring the earth and sand excavated by the cutter device to the earth discharging bucket is smoothly performed.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 shows a standing hole 1 excavated by a standing hole excavator (hereinafter, referred to as an excavator) for a deep foundation according to the present invention, and the standing hole 1
The excavator body 3 pulled up from above to the ground is shown.

More specifically, in FIG. 1, the excavator is lifted and lowered by the excavator body 3 suspended and supported on the gantry frame 4 so as to be able to move up and down and an electric hoist 6 running along an upper horizontal guide rail 5. It is composed of a free earth discharging bucket 7. The gantry frame 4 includes a lower horizontal frame 10 having wheels 8, four front, rear, left, and right (although some are not shown) standing frames 11 vertically rising from the lower horizontal frame 10, and a standing frame 11. And an upper horizontal frame 12 supported by the upper part of the frame. The wheel 8 is provided on the ground surface 2 so as to be able to travel on a rail 13 extending in the front-rear direction through a place where the vertical hole 1 is to be excavated. The upper horizontal guide rail 5 is relatively short and extends in parallel with the rail 13 installed on the ground surface 2, and its tip 5a is connected to the upper horizontal lower frame 12a.
It is fixed to.

Hereinafter, the excavator body 3 will be described in detail. FIG.
FIG. 3 shows a state in which the excavator body 3 is pulled up to the ground. In FIG. 3, a bottom portion 14 of the uphole 1 is excavated by the excavator body 3 in the upright hole 1 excavated to a predetermined depth. State is shown.

In FIG. 3, the excavator main body 3 has a cutter device 15 which constitutes the lowermost portion thereof.
5, a vertical screw conveyor device 16 is provided, and a sediment storage hopper device 17 is provided above the screw conveyor device 16.
And the sand hopper device 17 are attached to a turning portion of a turning device 19 provided below the vertical lifting support rod 18,
Above the turning device 19 on the vertical lifting support rod 18,
A gripper device 20 for holding the vertical lifting support rod 18 at the vertical hole center position by fixing the pressing tip portion to the inner peripheral wall of the vertical hole 1 is fixed, and the gripper device 20 is a lifting wire in a vertical lifting device 21 shown in FIG. It is suspended and supported at the lower end of 22. The lifting and lifting device 21 is configured by an electric winch connected to the upper horizontal frame 12 of the gantry frame 4 by a connection shaft 23.

Details of each of the above-mentioned devices of the excavator body 3 will be described in order. The cylindrical case 24 in the screw conveyor device 16 extends vertically, and a screw conveyor 25 is vertically arranged in the case. As shown in FIG. 4, a first drive motor 26 is installed at the upper end of the cylindrical case 24 with its motor shaft arranged vertically downward, and the motor shaft and the screw conveyor shaft 28 are directly connected. Thus, the screw drive 25 can be driven to rotate by driving the first drive motor 26.

The cutter device 15 includes an upper rotating case 31 having a vertical reinforcing rib 30 and a lower rotating cutter 32.
The joining members 33 and 34 provided on the joining end surfaces of the members are fixed to each other with bolts 35 and nuts to form a cutter casing 36. At the upper end of the upper rotating case portion 31, a rotation supporting plate member 37 having the same shape as the planar fixed supporting plate member 40 shown in FIG. 8 is provided, and a bearing portion outer ring 38 is integrally formed on the upper surface of the rotation supporting plate member 37. It is provided in.

On the other hand, a reinforcing rib 39 is provided at the lower end of the cylindrical case 24.
The fixed support plate member 40 is fixedly attached, and a bearing portion inner ring 41 is provided on the lower surface integrally with the fixed support plate member 40. A ball 42 is interposed between the inner and outer rings 38, 41 to form a bearing. The unit 43 is configured. The cutter casing 36 is rotatably supported at the lower end of the cylindrical case 24 via the bearing 43. The lower end of the cylindrical case 24 enters the cutter casing 36 as shown in FIG. 4, and the lower end 44 extends to the upper part of the rotary cutter 32. Note that the bearing 43 may have another configuration capable of receiving a thrust load.

On the upper surface of the fixed supporting plate member 40, two second drive motors 45 are fixed vertically symmetrically with respect to the cylindrical case 24 with the motor shaft arranged vertically downward, and the motor pinion 46 is provided with a bearing portion. It is in mesh with a drive gear 47 integrally formed on the outer surface of the outer ring 38. Therefore, it is possible to drive the two second drive motors 45 to rotationally drive the entire cutter unit casing 36.

The lower rotary cutter portion 32 of the cutter device 15 is configured such that the upper ends of three screw-shaped cutter blades 50 having the shapes shown in FIGS. A large number of cutter bits 52 are fixed at regular intervals to the edge of the cutter blade, and further fixed to the tip of each of the three screw-type cutter blades 50 to a cutter center tip guide member 53 having a cup-shaped cross section.

As shown in each figure, the screw-type cutter blade 50 has a relatively long portion parallel to the axis, and the cutter bit 52 is provided with an edge parallel to the axis of the screw-type cutter blade 50 and a clock. It is provided in a screw-like arrangement over the direction turning portion edge. Also,
The tip of the screw conveyor shaft 28 of the screw conveyor device 16 is inserted inside a cutter center tip guide member 53 having a cup-shaped cross section located at the center of the screw type cutter blade 50 and is rotatably supported.

Therefore, when the bottom portion 14 of the upright hole 1 is excavated by rotating the screw-type cutter blade 50 by the second drive motor 45, the excavated soil is collected at the center of the three screw-type cutter blades 50. Excavated earth and sand which does not spread outward and is collected at the center of the cutter is efficiently taken into the rotary cutter portion 32 through the gap 54 between the three screw-type cutter blades 5.

In the rotary cutter section 32, the screw conveyor 25 is rotated by the second drive motor 45,
The excavated earth and sand taken into the rotary cutter unit 32 rises in the cylindrical case 24 by the screw conveyor 25,
It is discharged from the discharge port 55 provided in the upper part of the cylindrical case 24 to the sediment storage hopper device 17 side. The sediment storage hopper device 17 is internally provided with the sediment storage portion 5 by the surrounding wall plate 56.
7 is formed, and an upper opening of the hopper body 58 is provided with a discharge port 5 at an upper part of the cylindrical case 24.
5, and has a sediment discharging port 59 at a lower portion of the hopper main body 58, and the sediment discharging port 59 is opened and closed by an opening / closing lid plate 60. The open / close lid plate 60 has bending arms 61 at both ends rotatably supported on both side surfaces of the surrounding wall plate 56 by support shafts 62, and a first hydraulic cylinder 63 provided on a side surface of the surrounding wall plate 56. Is connected to the bending arm 61 by the movable connecting pin 64. Therefore, by operating the first fluid pressure cylinder 63, the opening / closing lid plate 60 can be swung about the support shaft 62 to open and close the earth and sand discharge port 59.

The upper portion of the hopper main body 58 is pivotally supported by a pivot 66 of a pivot device 19 by a support shaft 65. Further, the upper portion of the second hydraulic cylinder 67 is supported by
And a lower portion of the second hydraulic cylinder 67 is connected to a side surface of the surrounding wall plate 56 by a connecting pin 69. Further, the upper arm piece 27 of the cylindrical case 24 is integrally fixed to the connecting arm plate 74 extending in parallel from the upper side surface of the surrounding wall plate 56 of the hopper body 58 by welding. (See Fig. 8)

Therefore, the cutter device 15, the screw conveyor device 16, and the sand hopper device 17 are integrally supported by the revolving portion 66 of the revolving device 19, and the The cutter device 15 can be turned around and stopped at a predetermined turning angle position, at which position the cutter device 15 can be driven to excavate the vertical hole bottom portion 14. By repeating this operation, the diameter of the cutter device 15 over the turning radius can be obtained. A large vertical hole 1 can be excavated.

Further, in the turning operation of the cutter device 15 about the vertical lifting support rod 18, the second fluid pressure cylinder 67 is extended, so that the hopper body is pivoted on the support shaft 68 shown in FIGS. 58 and the screw conveyor device 16 are rotated and tilted in a direction in which the lower part is away from the center of the vertical hole 1 (referred to as a width approaching direction). It is possible to excavate the vertical hole 1 having a larger diameter than when excavating the apparatus 16 in the vertical position. The excavation range that can be excavated by the cutter device 15 when the screw conveyor device 16 is inclined outward to the maximum is the maximum inner diameter of the excavable vertical hole.

Next, as shown in FIGS. 3 and 4, the turning device 19 has a fixed portion 70 fixed to the lower end portion of the vertical lifting support rod 18, and is supported by the fixed portion 70 so as to be freely rotatable.
And a revolving part 66 that can revolve around the vertical lifting support rod 18. The fixing portion 70 includes a fixed support plate member 72 with a reinforcing rib 71 fixed to a lower end portion of a vertical lifting support rod 18 (shown in FIG. 9) having a rectangular cross section, and an integral part of the fixed support plate member 72. A bearing portion outer ring 73 is provided on the lower surface thereof, and a gear 81 is integrally provided on the outer surface thereof. 4, the lower end edge 18a of the vertical lifting support rod 18 is indicated by a reference numeral.

On the other hand, the turning portion 66 of the turning device 19 is composed of a rotation support plate member 72 provided at the upper end of the vertical support frame, and a bearing inner ring 75 provided on the upper surface of the rotation support plate member 72. A bearing portion 77 is formed by interposing a ball 76 between the outer ring 73 and the inner ring 75 of the bearing portion, and a turning portion 66 is rotatably provided at the lower end of the vertical lifting support rod 18 via the bearing portion 77. Supported.

The rotation support member 79 in the turning section 66
A third drive motor 78 is provided with the motor shaft arranged vertically upward, and a motor pinion 80 meshes with a drive gear 81 integrally formed on the outer surface of the bearing outer ring 73. Therefore, the third drive motor 78 can be driven to turn the turning portion 66 of the turning device 19. The gripper device 20 shown in FIG. 3 is provided on the vertical lifting support rod 18 above and below the revolving device 19 so as to be able to move up and down, and the upper horizontal frame 1 of the gantry frame 4 shown in FIG.
2 is suspended by a lifting wire 22 fed from a lifting / lowering device 21 provided in the apparatus 2.

More specifically, the gripper device 20
Is composed of an annular main body frame 82 slidably fitted to the vertical lifting support rod 18 and a plurality of telescopic reaction force receiving grippers 83 provided on the annular main body frame 82 at equal angular intervals in a plane. You. The reaction force receiving gripper 83 has a flat arc shape, and has a pressing portion 85 having a hard rubber 84 mounted on its surface.
And a movable tubular guide 86 extending horizontally provided integrally on the back surface of the pressing portion 85. The movable tubular guide 86 is a fixed tubular guide integrally provided on the annular main body frame 82. It is provided slidably into the part 87.

Further, a support plate 88 is provided integrally with the annular main body frame 82 at the bottom position of the fixed cylindrical guide portion 87, and the rear end of the fluid pressure jack 89 provided inside is connected to the guide portion by a connecting pin 90. The hydraulic jack 89
The movable telescopic rod 91 is pivotally connected to the back surface of the pressing portion 85 by a connecting pin 92. Therefore, the hydraulic jack 89
The vertical lifting support rod 18 can be firmly fixed to the center of the vertical hole 1 by sending the pressure fluid to the vertical extension rod 91 to extend the movable telescopic rod 91 and press the pressing portion 85 at the tip thereof against the inner wall of the vertical hole 1.

The annular body frame 8 in the gripper device 20
2, a third hydraulic cylinder 95 is fixed to a plane symmetric position via a parallel support plate 93 and a holding member 94 fixed to the parallel support plate 93. The third hydraulic cylinder 95
The telescopic movable rod 96 is provided so that its axis is vertical and the distal end of the telescopic movable rod 96 is connected to a vertical support plate 97 provided on the upper surface of the fixed support plate member 72 of the turning device 19. They are connected by pins 98. Therefore, the turning device 19 and the vertical lifting support rod 18 are supported on the gripper device 20 by the third hydraulic cylinder 95 so as to be movable up and down.

A reinforcing plate 99 is provided on the upper surface of the fixed cylindrical guide portion 87 in the gripper device 20 at a substantially symmetrical position when viewed from a plane, and the lifting plate extended from the lifting / lowering lifting device 21 provided on the gantry frame 4. Wire 22
Of the reinforcing plate 9 via the locking shaft 101.
9. Therefore, the lifting / lowering device 21
Is operated to raise or lower the lifting wire 22 to raise or lower the gripper device 20 in which the pressing portion 85 is contracted, and to move the gripper device 2 through the third hydraulic cylinder 95.
0, a vertical lifting support rod 18 supported by
Then, the hopper device 17, the screw conveyer device 16, and the cutter device 15 on the lower side thereof can be integrally moved up and down.

Further, at the elevating position shown in FIG. 3, the reaction force receiving gripper 83 of the gripper device 20 is brought into press contact with the lining concrete 102 on the inner wall of the upright hole 1 and the cutter device 15 excavates the upright bottom 14. At this time, the third hydraulic cylinder 95 is extended as the excavation depth advances. As a result, the vertical lifting and lowering support rod 18 guided to be vertically movable with respect to the gripper device 20 is lowered, and the screw conveyor device 16 supported by the vertical lifting and lowering support rod 18 via the turning device 19 and the cutter device 15 When,
After the sand hopper device 17 is securely positioned at the predetermined position of the upright hole 1, each device is operated to operate the upright bottom 1.
4 can be smoothly excavated.

In the excavator body 3 having the above-described structure, when the excavation of the upright hole 1 is started, as shown in FIG. At this time, the excavator main body 3 is fixed to the gantry frame 4 by extending the reaction force receiving gripper 83 of the gripper device 20 and pressing the tip of the gripper 83 against the reaction force receiving column 103. The support column 103 for receiving the reaction force is provided on the standing frame 11 of the gantry frame 4.
And the upper and lower ends of the upper and lower horizontal frames 10, 1
It is fixed to 2.

By operating the first drive motor 26 in this state, the cutter device 15 is driven to rotate, the earth and sand is excavated by the screw-type cutter blade 50, and the excavated earth and sand is continuously taken into the cutter casing 36. The excavated earth and sand taken into the cutter unit casing 36 rises in the cylindrical case 24 by the screw conveyor 25 operated by the second drive motor 45, and is continuously charged into the hopper main body 58 from the upper outlet 55.

Since the opening / closing cover plate 60 closes the dropout opening 59 at the lower end of the hopper body 58, excavated earth and sand are accumulated in the hopper body 58 more and more. On the other hand, during this time, the electric hoist 6 suspends the earth discharging bucket 7 and travels to the position above the upright hole 1 in FIG. 1. At this position, the hoisting wire 29 of the hoist 6 is pulled down and the two-dot chain line in FIG. Lower to position.

The case where the earth discharging bucket 7 reaches the vertical hole bottom 14 will be described with reference to FIG. As shown in FIG. 3, the discharging bucket 7 is connected to the hoisting wire 2 of the hoist 6.
In a state of being suspended at 9 and descending vertically and reaching the bottom of the upright hole 14, the discharge port 59 at the lower end of the hopper body 58 of the sediment storage hopper device 17 faces the upper opening of the earth discharging bucket 7. (Shown in phantom in FIG. 3)
In this state, the first fluid pressure cylinder 63 is operated, and the opening / closing port 59 of the hopper main body 58 is opened by rotating the opening / closing lid plate 60, so that the excavated earth and sand accumulated in the hopper main body 58 is discharged into the discharge bucket 7. A predetermined amount.

When a predetermined amount of excavated earth and sand has been charged into the earth discharging bucket 7, the earth discharging bucket 7 is pulled up from the bottom of the vertical hole 1 to the ground by the hoist 6 to perform earth discharging. While the unloading bucket 7 is performing the unloading operation to rise up the vertical hole 1, regardless of this, the first and second drive motors 26, 45
Cutter device 15 and screw conveyor device 16
Is continuously operated, and the excavated sediment is transferred to the hopper body 5 until the discharging bucket 7 is next lowered to the vertical hole bottom 14.
Stored in 8. Thus, the excavator body 3 can continuously perform the excavating operation, and can smoothly transfer the excavated earth and sand to the earth discharging bucket 7 reaching the vertical hole bottom portion 14 after a certain period of time.

Since the discharge port 59 of the hopper body 58 is located above the discharge bucket 7, the discharge bucket 7 does not hit the hopper discharge port 59 when the discharge bucket 7 is pulled up and suspended. By the turning device 19
The hopper main body 58 is slightly shifted in the circumferential direction of the upright hole 1 or the hopper main body 58 is rotated about the support shaft 65 as a fulcrum by operating the second fluid pressure cylinder 67 so that the dropout port 59 is raised. The above-described problem can be solved by moving to the center of the hole 1 to temporarily escape.

A bracket 104 is provided on the upright frame 11 on one side of the gantry frame 4 shown in FIGS. 1 and 2, and a horizontal shaft 105 provided on the bracket 104 is provided with an engaging plate 106. . The engagement plate 106 has a tapered guide edge 107 and a tapered guide edge 10 whose distal end is enlarged in diameter.
7 is provided with an engagement recess 108 formed at the bottom. On the other hand, the engagement block 1
09 is attached to the lower end, and an engagement string 110 is hung.

With the above configuration, the discharging bucket 7 containing the excavated earth and sand is pulled straight up to a predetermined height, and then the electric hoist 6 is moved along the upper horizontal guide rail 5 as shown in FIGS. Drive to the right. At this time, the engaging string 110 suspended from the discharging bucket 7 is
6 engages with the engaging recess 108 via the tapered guide edge 107. Further, when the electric hoist 6 travels on the upper horizontal guide rail 5, the engagement block 109 is engaged with the lower side of the engagement recess 108, and the engagement string 110 is pulled to tilt the earth discharging bucket 7. Subsequently, by pulling down the hoisting wire 29 of the electric hoist 6, the unloading bucket 7 is inverted as shown by a two-dot chain line in FIGS. (Not shown)
Can be put in. Also, by performing the reverse operation to the above, the discharging bucket 6 is raised and returned to the normal posture, and the electric hoist 6 is moved in the opposite direction to be positioned above the standing hole 1,
It can be lowered again to the bottom hole 14.

As described above, according to the present invention, the rotation, lifting and lowering of the cutter device 15 and the operation of shifting the width of the cutter device (the tip of the cutter is inclined from the center of the vertical hole 1 toward the peripheral edge) are integrated, so that the deep foundation Can be excavated with high working efficiency. The above operations are performed by the first and second drive motors 2.
By operating the first and second fluid pressure cylinders 63 and 65, the electric hoist 6 and the like in a predetermined procedure by computer control in a predetermined procedure, the robots 6 and 45 can operate unattended and remotely.

[0040]

As described above, according to the present invention,
While excavating a vertical hole continuously with a drilling cutter device, the excavated soil is stored in a sediment storage hopper device, and sediment is intermittently charged and loaded into a discharging bucket that rises and falls at regular time intervals. The drilling work by the cutter device can be performed continuously while the soil bucket is raised and lowered, and the work of excavating the earth and sand excavated by the cutter device can be smoothly performed to the earth discharging bucket. The excavation work of the vertical hole can be performed with high work efficiency, and the configuration is simple.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is an overall side sectional view showing a deep foundation excavator body and a standing hole pulled up from the excavated standing hole to the ground.

FIG. 2 is an enlarged view of the upper part of FIG.

FIG. 3 is a side sectional view of the excavator body during excavation of the bottom of the excavation hole in FIG. 1;

FIG. 4 shows a cutter device, a screw conveyor device,
It is a partial section enlarged side view of a storage hopper device and a turning device.

FIG. 5 is an enlarged sectional view of a driving mechanism of the cutter device.

FIG. 6 is a bottom view of the cutter blade.

FIG. 7 is a plan view of a cutter blade.

FIG. 8 is a sectional view taken along the line BB of FIG. 3;

FIG. 9 is a sectional view taken along line AA of FIG. 3;

FIG. 10 is a sectional view taken along line CC of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Standing hole 2 Ground surface 3 Excavator main body 4 Mounting frame 5 Upper horizontal guide rail 6 Electric hoist 7 Discharge bucket 8 Wheel 10 Lower horizontal frame 11 Standing frame 12 Upper horizontal frame 13 Rail 14 Standing hole bottom 15 Cutter device 16 Stand Screw Conveyor Device 17 Soil Reservoir Hopper Device 18 Vertical Lifting Support Rod 19 Swivel Device 20 Gripper Device 21 Lifting and Lifting Device 22 Lifting Wire 23 Connecting Shaft 24 Cylindrical Case 25 Screw Conveyor 26 First Drive Motor 27 Earpiece 28 Screw Conveyor Shaft 29 Winding wire 30 Reinforcement rib 31 Upper rotating case part 32 Lower rotating cutter part 33 Joining flange edge 34 Joining flange edge 35 Bolt 36 Cutter unit casing 37 Rotation support plate member 38 Bearing outer ring 39 Reinforcement rib 40 Fixed support Plate member 41 Bearing inner ring 42 Ball 43 Bearing 44 Lower end 45 Second drive motor 46 Motor pinion 47 Drive gear 50 Screw cutter blade 51 Joining edge 52 Cutter bit 53 Cutter center tip guide member 54 Gap 55 Outlet 56 Enclosure wall Plate 57 Sediment storage section 58 Hopper body 59 Drop opening 60 Opening / closing lid plate 61 Bending arm 62 Support shaft 63 First fluid pressure cylinder 64 Movable connection pin 65 Support shaft 66 Revolving portion 67 Second fluid pressure cylinder 68 Support shaft 69 Connection pin 70 Fixed portion 71 Reinforcement rib 72 Fixed support plate member 73 Bearing outer ring 74 Connecting arm plate 75 Bearing inner ring 76 Ball 77 Bearing portion 78 Third drive motor 79 Rotation support plate member 80 Motor pinion 81 Drive gear 82 Ring body frame 83 Reaction force Receiving gripper 84 Hard rubber 85 Pressure section 86 Movable cylindrical guide section 87 Fixed cylindrical guide section 88 Support plate 89 Fluid pressure jack 90 Connecting pin 91 Movable telescopic rod 92 Connecting pin 93 Parallel support plate 94 Holding metal fitting 95 Third fluid pressure cylinder 96 Movable telescopic rod 97 Vertical support plate 98 Connecting pin 99 Reinforcement plate 100 Lower end locking bracket 101 Locking shaft 102 Lining concrete 103 Reaction support column 104 Bracket 105 Horizontal shaft 106 Engagement plate 107 Taper guide edge 108 Engagement recess 109 Engagement block 110 Engagement string

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E21D 1/06 E21D 1/00

Claims (2)

(57) [Claims] 1. A vertical screw conveyor device having functions of raising, lowering, turning, and shifting the width, an excavating cutter device attached to a tip of the screw conveyor device and having a sediment taking-in function for feeding excavated earth and sand into the screw conveyor device. , Provided integrally with the screw conveyor device,
An excavator main body suspended and supported so as to be able to ascend and descend from the ground; and A deep foundation foundation stand, which is suspended and supported by a ground-mounted elevating device that operates in conjunction with the pulling-in operation, and comprises an earth discharging bucket for loading earth and sand dropped from the earth and sand hopper device. Hole excavator. 2. A bottom of a vertical hole is excavated by an excavating cutter device provided at a lower end of a vertical screw conveyor device which is held so as to be able to ascend, descend, rotate, and approach width, and the excavated earth and sand is taken into the cutter device. In addition, the excavated earth and sand fed into the screw conveyor device and continuously sent from the outlet of the screw conveyor device to the sediment storage hopper device provided integrally with the conveyor device is moved up and down in the vertical hole at regular intervals. An excavation method for a deep foundation foundation that excavates while dropping a predetermined amount into a dumping bucket.