JPS6124509B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an excavation method and apparatus for excavating a vertical shaft, such as a deep foundation of a power transmission tower, using a vertical excavator.

Traditionally, excavating shafts that serve as the foundations of power transmission towers in mountainous areas requires a great deal of labor by workers, and workers inside the shafts are exposed to dangers such as falling rocks and lack of oxygen, which reduces work efficiency. inferior,
In addition, the work of lifting the bucket and lifting the excavated soil and stones was accompanied by danger for the workers. However, it is difficult to implement the water injection and suction method in mountainous areas, so it is important to improve the efficiency of deep foundation excavation for power transmission towers in mountainous areas, especially how to carry out the shear that has crushed rock to the ground while continuously excavating. As a result of various studies on how to dig, the present invention was developed.

The present invention performs continuous excavation using a vertical excavator,
The first aspect of the present invention is to carry out shaft excavation extremely efficiently by continuously transporting the shaft to the ground. The revolving arm of the vertical excavator is set to swivel, and while excavating with the cutter at the tip of the revolving arm, the vertical excavator is successively lowered and excavated so that it faces near the cutter and faces downward into the transport pipe. While moving the lower end suction port integrally with the revolving arm, the shear excavated by the cutter is sent to the shear separation and recovery device located on the ground together with the high-speed air flow generated in the transport pipe, and the shear and dust are separated. The present invention provides a vertical shaft excavation method characterized in that when the shear in the shear separation and recovery device reaches a predetermined amount, an opening/closing plate at the bottom opening is opened and the tunnel is dug while being loaded on a truck or the like. The second aspect of the invention is a vertical excavator that excavates by rotating a swinging arm with a cutter attached to the tip of the boom of a backhoe set on the ground via a hanging cable, and is set in a shaft and placed close to the cutter. Attach the upper end of a transport pipe that faces downward and has a lower end suction port that moves integrally with the revolving arm, and install a shear separation and recovery device on the ground that separates shear and dust and opens the opening/closing plate of the lower end opening at a predetermined amount of shear. The present invention further provides a shaft excavation device characterized in that the shear separation and recovery device and the vacuum suction/exhaust device are connected through a conduit.

The invention will be explained with reference to the drawings.

The vertical excavator 1 can be expanded and contracted in the radial direction, and when expanded,
It has outriggers 4, 4 that are in pressure contact with the shaft wall 3 of the shaft 2 and can freely support reaction forces, and the central support part 5 is provided with a drive mechanism 6 for driving a swing arm, a cutter drive, and for digging, and an upper end of the swing arm 7. 7a is attached to the central support part 5, and a cutter 8 is attached to the tip of the swing arm 7 extending downward, and the outrigger 4,
4, actuate the drive mechanism 6 to rotate the cutter 8, rotate the swing arm 7 using the upper end 7a as a rotation fulcrum, and sequentially lower the machine body to dig once. Each time the excavation to a predetermined depth is completed, the outriggers 4, 4 are contracted, the machine body is lowered, and the outriggers 4, 4 support the reaction force again, and then the excavation continues.

Next, the transport pipe support member 9 is attached to the vertical excavator 1.
Install. This transport pipe support member 9 has an upper end 9a
is attached to the central support part 5, and the lower end part 9b is attached to the lower part of the swing arm 7, and the lower end suction port 10a of the transport pipe 10 faces downward near the cutter 8 at the tip of the swing arm 7. 10a moves integrally with the rotating arm 7, and always remains in a position facing the cutter 8.

Further, the transport pipe 10 is held at the lower part by the central support part 5 and extends upward in the shaft 2, and after being brought to the ground, the upper end 10b is sheared to the separating and collecting device 11.
It is attached to the transport pipe 10 near the vertical excavator 1.
A secondary air intake valve 12 is provided at the bottom.

The vertical excavator 1 is suspended by a hoisting and unwinding mechanism 14 having a hanging rope 13, and is set to ensure the excavating operation state by outriggers 4, 4.

As shown in FIG. 2, the shear separation and recovery device 11 has a slanted cylindrical receiving body 16 mounted on a pedestal 15 erected on the ground. The upper end 10b of the transport pipe 10 is connected to the inlet 17, and one end of the conduit 19 is connected to the outlet 18 provided at the upper end of the inclined top part 16b.
Vacuum suction and exhaust device 2 corresponding to the ends of a and 19b
0a and 20b, respectively.

Further, the receiving body 16 of the separation and recovery device 11 has an inclined upper end as a closed end by an end wall 21, and an inclined lower end as an opening 23 which can be opened and closed by a hatch-shaped opening/closing plate 21. An operating cylinder 26 is provided, one end of which is pivotally supported on the upper bracket 25 of the mounting plate 24, and the upper end of the connecting plate 29, which is swingably mounted about a shaft 28 supported on the lower bracket 27 as an intermediate fulcrum, is operated. It is pivotally connected to the end of the rod 30 of the cylinder 26, and the lower end of the connecting plate 29 is fixed to the upper part of the opening/closing plate 22. When the operation cylinder 26 is actuated, the rod 30 is telescopically moved to open/close via the connecting plate 29. The plate 22 is swingable in the direction of the arrow (a), and an opening 23 is provided at the inclined lower end of the receiving body 19.
It can be opened and closed freely. In the figure, 31 is a work operation console, 32 is an operation panel, 33 is a fill gauge, 34 is a load release valve, 35 is a chute attached to the lower periphery of the opening 23 of the receiving body 16, 36 is a sub-chute, and 37 is a locking mechanism. It is.

The vacuum suction and exhaust devices 20a and 20b each include an engine unit 38, a fuel tank 39, a vacuum pump 40, and an exhaust unit 41.

Next, the setting process of the apparatus of the present invention will be explained with reference to FIG.

Using a backhoe 42 transported to a work site in a mountainous area by a helicopter (not shown) or the like,
The vertical excavator 1, which has been assembled and maintained from disassembled and transported parts, is attached to the tip of the boom 43 of the backhoe 42.
3, and while the boom 43 is tilted, the outriggers 4, 4 are guided through a guide rod (not shown) set on the ground in the initial excavation stage, and the swing arm 7 is actuated so that the cutter 8 After excavating and reaching the required excavation depth, backhoe 4
Winch 44 of the winding and unwinding mechanism 14 provided for 2
is operated to lower the vertical excavator 1 intermittently, excavate with the cutter 8 at the tip of the rotating arm 7, and transport the excavated shear to the ground via the transport pipe 10, and store it in the shear separation and recovery device 11. Set.

The vertical shaft excavation method using the apparatus of the present invention set as described above is carried out as follows.

In FIG. 1, the drive mechanism 6 is operated to swing the swing arm 7, the cutter 8 excavates the bottom of the hole, the vacuum suction and exhaust devices 20a and 20b are operated, and the secondary air intake valve 12 is opened. When it is opened to take in secondary air and generate a high-speed airflow inside the transport pipe 10, the excavated shear near the cutter 8 is rapidly sucked into the transport pipe 10 through the lower end suction port 10a and is transported along with the high-speed airflow. The material rises inside the tube 10, passes through the inlet 17 of the receiving body 16 from the upper end 10b, and is sent into the receiving body 16 of the shear separation and recovery device 11.

In this way, the amount of shear accommodated in the receiving body 16 increases, and when the top surface reaches the position shown by the imaginary line B, the full state is notified by the full capacity gauge 33, and the operation cylinder 26 is actuated to move the rod 30. It is shortened and the opening/closing plate 22 is rotated around the support shaft 28 to open it.

In advance, a transport vehicle (c) such as a truck is placed on standby facing the lower end opening 23 of the receiving body 16, and the opening/closing plate 22 is opened to remove the shear falling from the chute 35 from the transport vehicle (c).
to be loaded.

When the lower end opening 23 is closed by the opening/closing plate 22 and the shear is being fed into the receiving body 16, the receiving body 1
A conduit 19 whose one end is connected to the discharge port 18 at the upper part of 6
Air containing dust is constantly drawn into the vacuum suction/exhaust devices 20a and 20b. When water is sucked together with shear during bottom-hole excavation, the water improves the floating state of the shear moving with the high-speed air flow of the transport pipe 10, and reduces frictional resistance.

All operations such as secondary air intake valve 12, load release valve 34, operation cylinder 26, locking mechanism 37 operation of opening/closing plate 22, operation of vertical excavator 1, and excavation of vertical excavator 1 by unwinding winch 44, etc. The operation is performed by commands from the operation panel 32.

The vacuum suction and exhaust devices 20a and 20b are equipped with a dust removal mechanism, a water separation mechanism, and the like.

The present invention uses a vertical excavator to excavate while continuously transporting shear to a shear separation and recovery device via a transport pipe.
In addition to being able to perform excavation work by remote control, it has excellent effects such as dramatically improving the efficiency of deep foundation excavation.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing the outline of the device of the present invention, Figure 2
The figure is a cutaway side view of essential parts of the shear separation and recovery device, and FIG. 3 is an explanatory diagram of the setting state of the vertical excavator. 1... Vertical tunneling machine, 2... Vertical shaft, 3... Pit wall,
4...Outrigger, 5...Central support section, 6...
Drive mechanism, 7...Swivel arm, 8...Katsuta, 9
...Transport pipe support member, 10...Transport pipe, 11...
Shear separation and recovery device, 12... Secondary air intake valve, 13... Hanging rope, 14... Winding/unwinding mechanism, 16... Receiving body, 17... Inlet, 18...
Discharge port, 19... conduit, 20a, 20b... vacuum suction exhaust device, 22... opening/closing plate, 23... opening,
26... Operating cylinder, 29... Connection plate, 35...
...Shoot, 42...Buckhoe, 43...Boom, 44...Winch.

Claims (1)

[Scope of Claims] 1. A swing arm of a vertical excavator attached to the tip of a boom of a backhoe set on the ground via a hanging rope and set in a shaft is rotated, and a cutter at the tip of the swing arm is used to While excavating, the vertical excavator is gradually lowered and excavated, and the lower end suction port of the transport pipe, which faces near the cutter and faces downward, is moved together with the swing arm, and a high-speed air flow is generated inside the transport pipe. The shear excavated by the cutter is placed on the ground and sent to a shear separation and recovery device, where the shear and dust are separated, and when the shear in the shear separation and recovery device reaches a predetermined amount, an opening/closing plate at the lower end opening is opened and the truck is opened. A vertical shaft excavation method characterized by excavating while loading a shaft. 2. A vertical excavation machine that excavates by rotating a swinging arm with a cutter attached to the tip via a suspension line at the tip of the boom of a backhoe set on the ground, is set in the shaft, facing near the cutter, facing downward, and Attaching the upper end of the transport pipe having a lower end suction port that moves integrally with the revolving arm, and setting a shear separation and recovery device on the ground that separates shear and dust and opens an opening/closing plate at the lower end opening when a predetermined amount of shear occurs; A vertical shaft excavation device characterized in that a shear separation and recovery device and a vacuum suction/exhaust device are connected through a conduit.