JPH0639789B2 - Drilling equipment for ground inside caisson - Google Patents

Description

The present invention relates to a device for excavating the internal ground of a caisson.

[Conventional technology]

Attach an annular rail along the bottom of the inner wall of the caisson frame,
An excavator is movably installed along this annular rail, and the excavator excavates the ground at the caisson frame edge.

A device that excavates the ground at the blade edge of the caisson body and the ground at the center by extracting the reaction force from the inner wall of the caisson body, providing a girder in the radial direction, and extending the arm from the center.

A device for excavating from the surface by clamshell.

[Problems to be Solved by the Invention]

 The first device cannot excavate the central ground.

In the second device, as the diameter of the caisson becomes larger, the supporting members such as girders and arms become larger, resulting in higher cost.

The third device cannot excavate the ground at the blade end of the caisson body, but also cannot excavate the hard ground with a weak excavating force.

Therefore, an object of the present invention is to provide an excavation device for ground inside the caisson that can solve the above-mentioned problems.

[Means and Actions for Solving the Problems]

In the caisson inner ground excavating device of the present invention, a guide rail is continuously attached to the lower portion of the inner wall 2 of the caisson frame 1 in the circumferential direction, and the excavator body 6 and the second excavator body 6 of the first excavator 4 are provided along the guide rail. The excavator main body 7 of the excavator 5 is movably provided, and the first excavator 4 is connected to the excavator main body 6 with the boom 8 vertically swingably by the boom cylinder 10, and the boom 9 has the arm 9 attached thereto. Arm cylinder 11 is provided so that it can swing up and down.
The excavating blade 12 is provided at the tip of the arm 9 so as to be vertically swingable by the cylinder 13 so that the excavating blade 12 reaches the central portion inside the caisson 1, and the second excavator 5 is attached to the excavator main body 7. A plurality of arms are provided so that they can swing up and down, and the bucket 20
Is attached so as to excavate by swinging from the side of the caisson skeleton 1 toward the center, and the bucket 20 is movable from the blade end of the caisson skeleton at the center.

As a result, the excavating blade 12 of the first excavator 4 moves to the central portion inside the caisson, and further moves in the circumferential direction of the caisson frame 1 along the guide rail, so that the excavating blade 12 causes the ground A at the caisson central portion to move. ₁ can be excavated, and the bucket 20 of the second excavator 5 moves from the cutting edge of the caisson skeleton to the central part inside the caisson, and swings from the caisson skeleton 1 side toward the central part inside the caisson for excavation operation. Moreover, since it moves in the circumferential direction of the caisson frame 1 along the guide rails, the ground of the blade edge of the caisson frame A ₂ can be excavated by the bucket 20 and conveyed to the central part.

〔Example〕

As shown in FIG. 1, upper and lower guide rails 3 and 3 are continuously attached to the lower portion of the inner wall 2 of the caisson frame 1 in the circumferential direction, and the first and second excavator 4, along the upper and lower guide rails 3 and 3.
The excavator main bodies 6 and 7 of 5 are provided movably.

In the first excavator 4, a boom 8 and an arm 9 are provided on a main body 6 of the excavator so that the boom cylinder 10 and an arm cylinder 11 can swing up and down, and an excavating blade 12 at a tip of the arm 9 can swing up and down by a cylinder 13. It is provided so that the excavating blade 12 can excavate the ground A ₁ in the central portion.

In the second excavator 5, the first, second and third arms 14, 15, 16 are attached to the excavator main body 7 by the first, second and third arm cylinders 17, 18, 19 so as to be vertically swingable, The bucket 20 is attached to the tip of the third arm 16 by a bucket cylinder 21 so as to be able to swing up and down, and the bucket 20 can be swung from the side of the caisson body 1 toward the central portion. The ground A ₂ is excavated so that it can be transported to the central portion.

Then, as shown in FIG. 2 (a), the excavation blade 12 of the first excavator 4 excavates the ground A ₁ in the central portion, for example, rips it to weaken it.

After this, as shown in FIG. 2B, the ground A ₂ at the caisson blade edge is excavated by the bucket 20 of the second excavator 5, transported to the ground A ₁ at the central portion, piled up, and then transferred to the ground surface by the clam shell. To remove soil.

FIG. 3 shows the second embodiment, in which the bucket 22 is attached to the tip of the arm 9 of the first excavator 4 by a bucket cylinder 23 so as to be vertically swingable, and the bucket 22 has a central portion as shown in FIG. Excavate the ground A ₁ and transport it toward the outer periphery, excavate the ground A ₂ at the blade edge of the caisson skeleton by the bucket 20 of the second excavator 5 as shown in FIG. Discharge to the surface with a clamshell.

Although the first and second excavators 4 and 5 are movable along the guide rails in the above embodiment, they may be directly attached to the inner wall 2.

〔The invention's effect〕

The excavating blade 12 of the first excavator 4 moves to the central portion inside the caisson, and further moves in the circumferential direction of the caisson frame 1 along the guide rail. Therefore, the excavating blade 12 excavates the ground A _{1 in the} central portion of the caisson. The bucket 20 of the second excavator 5 moves from the cutting edge of the caisson skeleton to the central portion inside the caisson, and swings from the caisson skeleton 1 side toward the central portion inside the caisson for excavation operation, and the guide is provided. Since the caisson skeleton body 1 moves along the rail in the circumferential direction, the bucket 20 can excavate the ground A ₂ of the caisson skeleton blade edge portion toward the central portion and carry it to the central portion.

Therefore, the ground inside the caisson can be surely excavated.

Further, the bucket 20 of the second excavator 5 excavates by swinging from the caisson frame 1 side toward the central portion,
The cutting edge of the caisson 1 is not damaged during the excavation operation by the bucket 20.

Further, the first excavator 4 and the second excavator 5 move in the circumferential direction along the rail 3 provided on the inner wall 2 of the caisson frame 1,
Since the excavating blade 12 and the bucket 20 can swing up and down, the first and second excavators 4, 5 are used when the excavated soil accumulated in the central portion of the caisson is transported to the ground by a clamshell or the like.
Does not get in the way, and the first and second excavators 4, 5 move up and down together with the caisson frame 1, so that a drive source for moving the first and second excavators 4, 5 up and down is unnecessary.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a first embodiment of the present invention, FIGS. 2 (a) and 2 (b) are explanatory views of the excavation operation, and FIG. 3 shows a second embodiment. Sectional views and FIGS. 4 (a) and 4 (b) are explanatory views of the excavation operation. 1 is a caisson frame, 2 is an inner wall, 4 is a first excavator, and 5 is a second excavator.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsu Hirosawa 2-3-3 Akasaka, Minato-ku, Tokyo Komatsu Ltd. (72) Inventor Kaoru Tanaka 2-3-6 Akasaka, Minato-ku, Tokyo Stocks Komatsu Seisakusho Co., Ltd. (56) References JP-A-63-184619 (JP, A) JP-A-50-149105 (JP, A) Practical application Sho-56-25745 (JP, U)

Claims (1)

[Claims] 1. A guide rail is continuously attached to a lower portion of an inner wall 2 of a caisson frame 1 in a circumferential direction, and an excavator body 6 of a first excavator 4 and an excavator of a second excavator 5 are provided along the guide rail. A body 7 is provided movably, and the first excavator 4 is connected to an excavator body 6 so that a boom 8 can be vertically rocked by a boom cylinder 10, and an arm 9 can be vertically rocked on the boom 8 by an arm cylinder 11. Movably provided,
The excavating blade 12 is provided at the tip of the arm 9 so as to be vertically swingable by the cylinder 13 so that the excavating blade 12 reaches the central portion inside the caisson 1, and the second excavator 5 is attached to the excavator main body 7. A plurality of arms are provided so that they can swing up and down, and the bucket 20
The inside of the caisson is characterized in that the basket 20 is attached so as to excavate by swinging from the side of the caisson frame 1 toward the central part, and the basket 20 is movable from the blade end of the caisson frame to the central part. Ground drilling equipment.