JPH0860968A - All-casing excavator - Google Patents

Abstract

PURPOSE: To enable construction time and cost to be both reduced by enabling even hard bedrock to be drilled efficiently. CONSTITUTION: Each outside mounting block 6 is mounted in the large-aperture position (or small-aperture position) of a connecting block 8, and the lower end of each outside mounting block 6 is connected by a connecting member 14 for large apertures (or connecting member 15 for small apertures). Then a gripper device 4 is operated by means of fluid pressure, and a ring-shaped hollowing excavation device is secured to a casing tube. Then the casing tube and the ring-shaped hollowing excavation device are driven into the ground while being rotated or rocked, and a ring-shaped hole is drilled in the center by operating using the fluid pressure a crushing impactor 5 mounted on the lower end of an inside mounting block 7, and by rotating and moving a cutter bit 16. Also, a ring-shaped hole of a large (or small) aperture is drilled around the ring-shaped hole in the center by operating using the fluid pressure the impacting crusher 5 mounted on the lower end of each outside mounting block 6, and by rotating and moving the cutter bit 16 mounted on the lower surface of the connecting member 14 for large apertures (or connecting member 15 for small apertures).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ring-shaped medium excavation device for an all-casing excavator used for excavating a vertical shaft, constructing a foundation pile or the like.

[0002]

2. Description of the Related Art A conventional all-casing excavator used for vertical shaft excavation, foundation pile construction, etc. will be described with reference to FIG. 7. Reference numeral 1 denotes an all-casing excavator installed on the ground. While the casing tube 2 is rotated or swung, the casing tube 2 is pushed into the ground to excavate a ring-shaped hole and the excavated hole wall is maintained by the casing tube 2, while the excavation bucket 3 is moved up and down by a wire.
Further, the tip portion of the excavation bucket 3 is opened and closed to excavate the earth and sand in the casing tube 2 and discharge the earth to form a vertical shaft.

[0003]

The conventional all-casing excavator shown in FIG. 7 is capable of excavating a complex stratum or strong rock, but when excavating a strong rock,
The cutter bit attached to the tip of the casing tube 2 is damaged and worn early, and 5 to 30c per hour
Only about m can be excavated.

Although the excavation bucket 3 can effectively excavate and remove soil, it has a very poor excavation efficiency for rock mass, and the casing tube 2 excavates rock mass for about 5 to 30 cm per hour. Even so, the excavation bucket 3 has a problem that only about half of the bedrock can be excavated in a ring shape. The present invention is proposed in view of the above problems, and an object thereof is an all casing that can efficiently excavate even a strong rock bed and can achieve both a reduction in construction time and a reduction in construction cost. The point is to provide a ring-shaped medium excavation device for an excavator.

[0005]

In order to achieve the above object, the present invention is to push the casing tube into the ground while rotating or swinging the casing tube to excavate the earth and sand in the casing tube and to excavate the hole wall. In an all-casing excavator that maintains the
A ring-shaped medium excavation device for excavating earth and sand etc. in the casing tube, a connecting base that can be raised and lowered, and a plurality of outer mounting bases attached at a small diameter position or a large diameter position on the lower surface of the outer peripheral portion of the connection base. , The inner mounting base mounted on the lower surface of the central portion of the connecting base, and the outer mounting bases that are mounted so as to be able to expand and contract inward and outward in the radial direction, and are attached to the inner surface of the casing tube when extending outward in the radial direction. Presser gripper device, impact crusher attached to the lower end of each of the outer mounting base and the inner mounting base, and the lower end of each outer mounting base when the outer mounting base is mounted at the small diameter position of the connecting base. A connecting member for a small diameter for connecting the parts, a connecting member for a large diameter for connecting the lower ends of the outer mounting bases when the outer mounting bases are mounted at a large diameter position of the connecting base, and the connecting members Underside and above It is constituted by a cutter bit attached to the lower end of the side connecting mount.

[0006]

The ring-shaped medium excavating device for an all-casing excavator according to the present invention is constructed as described above. Each outer mounting base is attached to a large-diameter position (or a small-diameter position) of a connecting base, and each outer side is mounted. Connect the lower end of the mounting base with a large-diameter connecting material (or a small-diameter connecting material), then operate the gripper device by fluid pressure to fix the ring-shaped hollow excavator to the casing tube, and then the casing tube. Also, the ring-shaped hollow excavator is pushed into the ground while rotating or rocking, and the ring-shaped hole is formed in the center by the operation of the crushing percussion machine attached to the lower end of the inner mount by the fluid pressure and the rotational movement of the cutter bit. While excavating, the operation by the fluid pressure of the impact crusher attached to the lower end of each outer mounting base and the Kattabi attached to the lower surface of the large diameter connecting material (or small diameter connecting material) The rotational movement of the bets drilling ring hole of large diameter (or small diameter) around the ring-shaped hole in the central portion.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an explanation will be given of a ring-shaped intermediate excavation device for an all-casing excavator according to an embodiment shown in FIGS. 1 to 6, FIG. 1 showing a state in which the ring-shaped intermediate excavation device is disassembled. The part on the left side of the center line of FIG. 2 shows a state where the small diameter is assembled and excavated, the right part of FIG. 2 shows the state where the large diameter is assembled and excavated, and FIG. 2 shows the bottom surface along the line AA in FIG. 2, and FIG.
The cross-sectional plane which follows the BB line of FIG. 2 is shown, and FIG. 5 and FIG. 6 have shown the construction state.

3 and 4, the left side from the center line shows a state where the small diameter is assembled and excavated, and the right side shows the state where the large diameter is assembled and excavated. As shown in FIG. 1, the present ring-shaped hollow excavation device includes a connecting base 8 that can be moved up and down, and a plurality of outer mounting bases mounted by bolts on the lower surface of the outer peripheral portion of the connecting base 8 at small or large diameter positions. 6, an inner mounting base 7 mounted on the lower surface of the central portion of the connecting base 8 by a bolt, and an outer mounting base 6 which is radially expandable inward and outward, and extends radially outward. Sometimes the gripper inner cylinder 1 of the gripper device 4 is pressed against the inner surface of the casing tube 2 (see FIG. 2).
1, the outer crushing machine 5 attached to the lower ends of the outer mounts 6 and the inner mounts 7, and the outer mounts 6 when the outer mounts 6 are mounted at the small diameter position of the connecting base 8. A small-diameter connecting member 15 for connecting the lower end portions of the outer peripheral mounting members 6 and a large-diameter connecting member for connecting the lower end portions of the outer mounting members 6 when the outer mounting members 6 are mounted at the large diameter position of the connecting member 8. The member 14 and the cutter bits 16 attached to the lower surfaces of the connecting members 14 and 15 and the lower end of the inner connecting mount.

The ring-shaped medium excavation device is shown in FIGS.
More specifically, as shown in FIG. 2, a swivel joint 9 is attached to the upper surface of the connecting base 8, and a fluid pressure (air pressure or hydraulic pressure) is supplied to the swivel joint 9 from the ground. The flexible hose 10 is attached. The gripper device 4 includes a gripper inner cylinder 11 that is pressed against the inner surface of the casing tube 2.
When the gripper cylinder 12 is operated in the extension direction, the gripper inner cylinder 11 is pressed against the inner surface of the casing tube 2 and the gripper cylinder 12 is operated in the contraction direction. The gripper inner cylinder 11 is adapted to separate from the inner surface of the casing tube 2.

FIG. 3 is a cross-sectional bottom view taken along the line AA of FIG. 2, in which the left side from the center line shows a state in which the small diameter is assembled and excavation is performed, and the right side is the large diameter. It shows a state of assembling and excavating, 5 is an impact crusher, 6 is an outer diameter side mounting base, 7 is an inner diameter side mounting base, and 14 on the right side of the center line is mounted on each outer diameter side when excavating a large diameter A large-diameter connecting material that connects the pedestals 6, and 15 on the left side of the center line is a small-diameter connecting material that connects the outer diameter side mounting bases 6 when excavating the small-diameter. It has been changed to change the excavation diameter. A cutter bit 16 is attached to the connecting members 14 and 15 and the inner mount 7.

FIG. 4 is a cross-sectional plan view taken along the line BB in FIG. 1, in which the left side from the center line shows a state where the small diameter is assembled and excavation is performed, and the right side portion is the large diameter. It shows the state of being assembled and excavated, and the casing tube 2
Gripper inner cylinder 10 press-contacted to the inner surface of the, outer diameter side mounting base 6 incorporating the gripper inner cylinder 10, and outer diameter side mounting base 6
It shows a state in which is connected to the connection base 8 by bolts.

Next, the construction of the ring-shaped ring-shaped hollow excavator for an all-casing excavator according to the present invention is shown in FIGS.
Will be described. Reference numeral 17 in FIG. 5 shows the state of the ring-shaped medium excavation device during large-diameter excavation. At this time, the outer mounting bases 6 are attached to the large-diameter positions of the connecting bases 8, and the lower ends of the outer mounting bases 6 are connected by the large-diameter connecting members 14.

Next, the fluid pressure (air pressure or hydraulic pressure) is applied to the ground air compressor or hydraulic unit (not shown).
The flexible hose 10 extending downward through the flexible hose support 19 is supplied to the ring-shaped hollow excavating device 17 through the swivel joint 9, and the outer mounts 6 are also provided.
The gripper inner cylinders 11 of the respective gripper devices 4 provided in the above are operated outward in the radial direction, and the respective gripper inner cylinders 11 are pressed against the inner surface of the casing tube 2 to form the ring-shaped hollow excavation device 1
7 is fixed to the casing tube 2.

Then, the casing tube 2 and the ring-shaped hollow excavator 17 clapped by an all-casing excavator installed on the ground (see 1 in FIG. 7) are pushed into the ground while rotating or rocking, and the inner mount 7 The ring-shaped hole is drilled in the center by the operation of the crushing percussion machine 5 attached to the lower end portion by the fluid pressure and the rotational movement of the cutter bit 16, while the fluid of the percussion crusher 5 attached to the lower end portion of each outer mount 6 is drilled. A large-diameter ring-shaped hole is drilled around the central ring-shaped hole by the operation by pressure and the rotational movement of the cutter bit 16 attached to the lower surface of the large-diameter connecting member 14.

Reference numeral 18 in FIG. 6 shows a state of the ring-shaped medium excavation device at the time of excavating a small diameter. At this time, each outer mounting base 6 is attached to the small-diameter position of the connecting base 8, and the lower ends of the respective outer mounting bases 6 are connected by the small-diameter connecting member 15. Next, a fluid pressure (air pressure or hydraulic pressure) is applied to a ground air compressor or a hydraulic unit (not shown) → a flexible hose 10 extending downward through a flexible hose support 19 → a swivel joint 9 and a ring-shaped hollow excavator 18 The gripper inner cylinders 11 of the respective gripper devices 4 provided on the respective outer mounting bases 6 are actuated radially outward, and the respective gripper inner cylinders 11 are moved to the casing tube 2
The ring-shaped hollow excavating device 18 is fixed to the casing tube 2 by pressure contact with the inner surface of the casing tube 2.

Then, the casing tube 2 and the ring-shaped hollow excavation device 18 clapped by the all-casing excavator installed on the ground (see 1 in FIG. 7) are pushed into the ground while rotating or rocking, and the inner mount 7 The ring-shaped hole is drilled in the center by the operation of the crushing percussion machine 5 attached to the lower end portion by the fluid pressure and the rotational movement of the cutter bit 16, while the fluid of the percussion crusher 5 attached to the lower end portion of each outer mount 6 is drilled. By the operation by pressure and the rotational movement of the cutter bit 16 attached to the lower surface of the small-diameter connecting member 15, the small-diameter ring-shaped hole is excavated around the central ring-shaped hole.

[0017]

As described above, in the ring-shaped intermediate excavation device for an all-casing excavator of the present invention, each outer mounting base is attached to the large-diameter position (or small-diameter position) of the connecting base, and The lower end is connected by a large-diameter connecting material (or a small-diameter connecting material), and then the gripper device is actuated by fluid pressure to fix the ring-shaped hollow excavator to the casing tube, and then the casing tube and the ring shape. Push the underground excavator into the ground while rotating or rocking, and excavate a ring-shaped hole in the center by the operation of the crushing percussion machine attached to the lower end of the inner mount by the fluid pressure and the rotational movement of the cutter bit. On the other hand, the operation of the impact crusher mounted on the lower end of each outer mounting base by the fluid pressure and the rotation of the cutter bit mounted on the lower surface of the large diameter connecting material (or the small diameter connecting material) A large-diameter (or small-diameter) ring-shaped hole is excavated around the above-mentioned central part by movement, so it is possible to efficiently excavate even solid rock, reducing construction time and construction cost. And can be achieved together.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a ring-shaped medium excavation device for an all-casing excavator of the present invention.

FIG. 2 is a vertical sectional side view showing a state in which a portion on the left side of the center line of the figure is assembled and excavated in a small diameter, and a portion of the right side from the center line in the figure is assembled and excavated in a large diameter. Is.

FIG. 3 is a bottom view taken along the line AA of FIG.

4 is a cross-sectional plan view taken along the line BB of FIG.

FIG. 5 is an explanatory view showing a construction state during large-diameter excavation.

FIG. 6 is an explanatory view showing a construction state when excavating a small diameter.

FIG. 7 is a vertical sectional side view showing a conventional all-casing excavator.

[Explanation of symbols]

 2 Casing tube 4 Gripper device 5 Impact crusher 6 Outer mounting base 7 Inner mounting base 8 Connection base 14 Large diameter connection material 15 Small diameter connection material 16 Cutter bit

Claims (1)

[Claims] 1. An all-casing excavator that pushes into the ground while rotating or rocking a casing tube to excavate the earth and sand in the casing tube and to maintain the excavated hole wall by the casing tube. A ring-shaped medium excavation device for excavating, etc., a connecting base capable of moving up and down, a plurality of outer mounting bases mounted at a small diameter position or a large diameter position on the lower surface of the outer periphery of the connecting base, and the center of the connecting base. An inner mounting base mounted on the lower surface of the part, a gripper device that is mounted on each of the outer mounting bases so as to be able to expand and contract inward and outward in the radial direction, and presses against the inner surface of the casing tube when extending outward in the radial direction, The impact crusher attached to the lower end of each of the outer mounts and the inner mounts, and the outer mounts at the small diameter position of the connecting base. A small diameter connecting material that connects the lower ends of the outer mounting bases when attached, and a large diameter that connects the lower ends of the outer mounting bases when the outer mounting bases are attached to the large diameter position of the connecting base. An all-casing excavator comprising: a connecting material for use with a cutter bit attached to a lower surface of each of the connecting materials and a lower end portion of the inner connecting mount.