JPS5998993A - Drilling machine for ground - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a ground excavator for excavating the lower part or inside of a large structure such as a caisson.

General ('C) When installing a structure such as a caisson in relatively shallow water, the lower part of the caisson is excavated using the submerged box method to form a foundation. However, in deep water, etc. Structures such as caissons have become larger and the conventional underground box construction method is dangerous and cannot be used.

The present invention has been made in view of the above circumstances, and an object of the present invention is to propose a ground excavator capable of excavating the bottom S of a large structure such as a caisson.

In order to achieve the above object, the present invention inserts a center pipe into the opening of a large structure such as a caisson, fixes the tip of the center pipe to the ground, and makes the center pipe recoilless. Unit sliding vibe, rotating pipe,
This recoilless excavation unit is supported by a boom, slides in the axial direction along the center pipe and rotates in the circumferential direction, and further swings the boom to excavate the lower part of a large structure such as a caisson. It is characterized by

Embodiments of an excavator according to the present invention will be described in detail below with reference to the accompanying drawings.

1 and 2, the schematic structure of a large caisson 10 with several bales is shown. The outer shape of the caisson IO is formed into a framework by the side wall 12, and a plurality of openings i4 are formed inside. Furthermore, the inside of the caisson 10 is formed into a hollow shape. A plurality of support piles 16 are embedded around the caisson 10, and the upper part of the caisson 10 is welded to the upper part of the support pile 16.
It is fixed using means such as bolts.

FIG. 3 shows the structure of an excavator according to this embodiment. In FIG. 3, the lower end 19 of the center vibrator 18 is inserted into a pilot hole 20 and a center hole 22 that have been drilled in advance, and is fixed to the bottom surface 24 of the center hole 22 via a mortar 26. The pilot hole 20 and the center hole 22 are drilled so that their centers coincide with the center position of the opening 14 of the caisson 10. On the outer periphery of the center vibe 18,
A sliding vibrator 28 is supported slidably in the axial direction.

That is, the outer periphery of the center pipe 18 is coated with silver 30 mm in the axial direction.
is formed, and this protrusion 30 fits into a groove (not shown) on the inner peripheral surface of the sliding vibe 28, and the sliding vibe 28 is fitted with this protrusion 30.
move axially along.

The upper part of the rotating vibrator 32 is rotatably attached to the lower part of the sliding vibrator 28. That is, as shown in FIG. 4, the seven flange 34 at the upper end of the rotating vibrator 32 is placed via a bearing 38 on the seven flange 36 formed on the inner circumferential surface of the lower end of the sliding vibrator 28. 32 is rotatably supported by the sliding vibrator 28. A motor 40 is provided on the outer circumference of the lower end of the sliding vibrator 28, and the motor 40 can apply rotational force to the rotating vibrator 32 via a pinion 42 and a gear 44 provided on the outer circumference of the rotating vibrator 32.

One ends 50 of two booms 48 are pivotally supported on the outer periphery of the rotating vibe 32 at diametrically opposite positions via brackets 46 . A reactionless digging unit 54 is provided at the other end 52 of the boom 48 . The recoilless excavation unit 54 is a third
As shown in the figure, for example, three pits 56 (only two are shown in the figure) revolve around the center line of the excavation unit 54 in the opposite direction to the rotation direction while rotating.
offsets the recoil torque received by the As shown in M5, the upper end of a feed cylinder 64 is attached to the other end 52 of the boom 48 via a spherical bearing 62. Spherical bearing 62
is provided to allow the swinging of the recoilless excavation unit 54 during trapping during excavation.

The upper end of the recoilless excavation unit 54 is pivotally supported at the lower end of the feed cylinder 64 via a link 65 . The recoilless excavation unit 54 has a long revolving portion 66 and has a large self-weight. The reactionless excavation unit 54 is given a supply pressure during excavation by its own weight, and this supply pressure is adjusted by expanding and contracting the feed cylinder 64.

A cylinder support vibro 8 is supported by the center pipe 18 below the rotating vibrator 32 so as to be slidable in the axial direction and the circumferential direction. A lower end 72 of an arm 70 is pivotally supported on the outer periphery of the cylinder support vibro 8.
4 is pivotally supported by a boom 48. A cylinder 76 is fixed to the support vibro 8, and the tip of a piston rod 77 of this cylinder 76 is attached to the rotating vibrator 32 (
・Ru.

Therefore, the cylinder 76 is retracted and the supporting vibro 8 is operated.
When the arm 70 pushes up the boom 48,
The excavation position can be changed as shown by the two-dot chain line in FIG.

An adjustment vibrator 78 is slidably provided on the outer periphery of the sliding pie 128. A reverse hose 80 from the recoilless excavation unit 54 is supported by the adjustment vibe 78,
This reverse hose 80 extends upward. Reference numeral 82 is a wire that suspends the d-movement pipe 28, 84 is a wire that suspends the adjustment vibrator 78, and 86 is an air hose that is connected to the reverse hose 80.

The operation of the embodiment according to the present invention configured as described above is as follows. First, the center vibe 18 is moved to the caisson lO
The sliding vibrator 28 suspended by a wire 82 is lowered along the center vibrator 18 by inserting it into the pilot hole 20 and the center hole 22, which are the central positions of the opening 14 of the caisson 10, and fixing it therein. Excavating the seabed. In this excavation, the excavation unit 54 offsets the excavation reaction torque due to the rotation of the pit 56, so the boom 4
8 Kasani Ii! , force and torque can be transmitted (・) The diametrical movement of the excavation unit 54 is performed by expanding and contracting the cylinder 76. At this time, the V・j product vibration 78 is
It moves up and down depending on the position of the excavation unit 54 to prevent the reverse hose 80 from loosening. It's f, drilling unit 5.
40 Circumferential movement is caused by the morph 40 rotating the vibrator 32
This is done by rotating the .

Quotient, 'Jj: M! As in the example above, the area near the bottom of the cutting edge 15 and the corner S+J are excavated using a υF tool such as a water jet.

Excavation) Caisson 100F so that the face is on the same plane.
Then, the excavator and center pipe 18 are pulled up. The caisson 10 is slightly fixed to the lower part of the caisson 10 with concrete. In this way, the foundations of structures such as caissons can be constructed.

In an unrecorded example, the swinging cylinder 7 of the boom 48
6 is attached to the cylinder supporting vibro 8, or the cylinder 76 may be directly attached to the rotating pipe 32t'llll to swing the boom.

In the embodiment described above, the case where the lower part of the multi-frame large caisson 10 is excavated is explained, but the present invention can also be applied to the single-frame square caisson 88 shown in FIG. 6 and the single-frame circular caisson 90 shown in FIG.

As explained above, according to the excavator according to the present invention, the center vibe is fixed to the ground, and a plurality of recoilless excavation units, such as the occupation vibe, the rotary vibe, and the boom, are installed on the center vibe, and the Since the reactionless excavation unit can slide in the axial direction along the center pipe and rotate in the circumferential direction, the boom can be swung to change the position of the reactionless excavation unit relative to the center vibe. It is possible to excavate at great depths under caisson etc.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a multi-frame caisson, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, Fig. 31121 is a front view showing the overall shape of the embodiment according to the present invention, Fig. 4 is A on Figure 3
FIG. 5 is a front view of the reactionless digging +j+j unit of this embodiment, FIG. 6 is a plan view of a single frame square caisson, and FIG. 7 is a plan view of a single frame circular caisson. 18... Center vibe, 28... 4U iJb vibe, 32... Rotating vibe, 48... Boom, 54...
...Reactionless drilling unit, 68...Cylinder support pipe, 70...Arm, 76...Cylinder. Agent: Kenzo Matsuura, Patent Attorney Figure 6, Figure 71'J

Claims (1)

[Claims] A centano-vib whose lower end is fixed to the ground, a centa-no-vibe supported from above by a wire (sliding provided on the outer periphery of the eve so that it can freely slide in the axial direction), and a sliding vibrator rotatably supported. A rotary pipe to which one end of a plurality of booms is pivotally supported, a rotary drive source that rotates a rotary knob, and a plurality of bits provided at the other end of each boom rotate in a direction opposite to the rotation direction. The diameter of the recoilless drilling unit that revolves around the center pipe, and the diameter of the recoilless drilling unit that rotates the boom and is relative to the center pipe.