JPH0133636B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shaft excavation device used for excavating a shaft for constructing the foundation of a steel tower or other structure or for other purposes.

Conventionally, as a vertical shaft excavation device, the
As disclosed in Publication No. 51902, an annular main body fixed to the wall of a shaft is provided with a central carrying-out hole, and an annular support that is rotated by a rotation drive device is attached, and a breaker is installed at the bottom of the annular support. A shaft excavating apparatus is known in which the base end of a first arm supporting a backhoe is rotatably attached, and a second arm supporting a backhoe is rotatably attached.

When excavating a shaft using this shaft excavation equipment, first, the carrying bucket is lowered through the central carrying out hole to the center of the bottom of the shaft, and then, while rotating the annular support platform, a breaker is used to move the carrying bucket out of the carrying bucket. The bottom of the shaft is excavated, the excavated soil is scooped up with a bucket hoe and put into the bucket, the excavated soil is carried out by lifting the bucket with a winch, the bucket is moved from the center of the bottom of the shaft, and the excavated soil is removed from the bottom of the shaft. A worker manually excavates the center of the bottom of the shaft, manually puts the excavated soil into a bucket, and then lifts the bucket with a winch and carries out the excavated soil.

However, when excavating a shaft using the conventional shaft excavation equipment, it is necessary to scoop up the excavated soil with a backhoe and put it into the bucket, which requires complicated backhoe operation and reduces the efficiency of transporting the excavated soil. Moreover, it is necessary to manually excavate the center of the bottom of the shaft and manually put the excavated soil into the bucket, which requires a large amount of labor, has poor work efficiency, and is dangerous.

SUMMARY OF THE INVENTION An object of the present invention is to provide a shaft excavation device that advantageously solves the above-mentioned problems in conventional shaft excavation devices.

Next, the present invention will be explained in detail using illustrated examples.

The drawing shows an embodiment of the present invention, in which a pre-drilling shaft is provided at the planned shaft excavation position in rock or other hard ground 9, and the pre-drilling shaft has a depth that allows the insertion of a drilling device, and the pre-drilling shaft is surrounded. A turret supporting foundation 10 is provided, and on the top of the turret 11 fixed to the foundation 10, there are two hoisting machines 12 for lifting and lowering the excavation equipment, each consisting of a chain block, and a hoisting machine 13 for transporting excavated waste outside the mine. , a traveling hoist 14 for carrying in supporting frame materials are fixed, and the chain 15 and the hanging rod 1 are
6, the left and right sides of the annular body 2 are suspended and supported, and an inclined outrigger 17 is attached to the upper part of the annular body 2 so as to be swingable in the radial direction of the annular body. The lower end of an inclined outrigger 18 is attached around the lower part of the annular body 2 so as to be able to swing freely in the radial direction of the annular body. The annular body 2 is firmly fixed to the shaft wall 1 and supports the excavation reaction force by pressing the bearing plate 20 at the tip of each outrigger 17, 18 to the shaft wall 1.

An annular support base 4 is rotatably attached to the lower end of the annular body 2 via an annular ball bearing 21, and a swing drive device 3 consisting of an electric motor and a speed reducer disposed inside the annular body 2 is connected to the annular support base 4. A pinion 2 fixed to and rotated by its swing drive device 3
2 is meshed with an intermediate gear 23, and the intermediate gear 23 is connected to an annular internal gear 24 fixed to the annular body 2.
The upper end of the swinging arm excavator 7 is engaged with the annular support base 4 at a position offset to the side from the hoistway of the clamshell 5 that moves up and down through the annular main body 2 and the annular support base 4. The swinging arm type excavator 7 further includes a telescoping arm 27 that is extended and contracted by a telescoping hydraulic cylinder 26, and a lower end of the telescoping arm 27. A cutter drive device (not shown) consisting of a truncated conical drum-shaped rotary cutter 6 with a large number of picks rotatably attached to the telescopic arm 27, and an electric motor and a speed reducer built into the telescopic arm 27 to drive the rotary cutter 6. ). Further, the intermediate portion of the telescopic arm 27 and the annular support base 4 are connected by a hydraulic cylinder 28 for swinging the arm.

The two scraping devices 8 for central accumulation of excavated waste are arranged on both sides of the swinging arm excavator 7 at positions laterally offset from the passage of the clam shell 5, and each scraping device 8 is arranged in a vertical direction. A holding member 29 and a scraping member 30 attached to the holding member 29 so as to be movable up and down.
and a lifting hydraulic cylinder 31 connecting the holding member 29 and the scraping member 30,
The upper end of the holding member 29 is pivotally connected to the annular support 4 by a horizontal shaft 32 perpendicular to the radius line of the rotating support.
A stopper 29' is provided which is located closer to the shaft wall surface than the raking device 2, and the raking device 8 can be rotated in the direction of arrow A from a substantially vertical position shown by a solid line in FIG. The stopper 2
9' abuts against the annular support base 4 and cannot be rotated.

Note that the upper end portion of the holding member 29 may be integrally fixed to the annular support base 4.

The clamshell hoistway is arranged eccentrically with respect to the annular main body 2 and the annular support 4, and the lower end of the inner cylinder 33 surrounding the clamshell hoistway is connected to the annular support 4.
An annular scaffold/driver's platform 34, which is fixed to the inner tube 33 and further arranged on the upper part of the annular main body 2, is fixed to the inner cylinder 33, and when the annular support 4 is rotated, the swinging arm excavator attached to it is fixed to the inner cylinder 33. The machine 7, the scraping device 8 for centrally accumulating excavated debris, the scaffolding/driving platform 34, the inner cylinder 33, etc. also rotate at the same time.

A control panel 36 having a television 35 is fixed to the scaffold/driver's cab 34, and an annular ceiling plate 37 provided above the scaffold/driver's cab 34 is attached to the inner tube 33.
The annular body 2 and the inner cylinder 33 are fixed to the upper end, and due to the eccentricity between the clamshell hoistway and the annular body, the annular body 2 and the inner cylinder 33
The swing drive device 3, a hydraulic unit 39 for operating each part, and other control equipment (not shown) are housed in a storage chamber 38 formed between the swing drive device 3 and the swing drive device 3, and other control equipment (not shown) The machine 7 is arranged below the maximum width portion of the storage chamber 38.

A television camera 40 is attached to the lower part of the annular support base 4, and the operation can be performed while observing the bottom excavation section by the rotary cutter 6 and the state of the excavated debris being caught by the clam shell 5 on the television in the driver's seat.

In order to set the annular body 2 concentrically with respect to the shaft, it is preferable that the annular body be provided with a horizontality measuring instrument, a longitudinal position measuring device, and other various instruments.

When excavating a shaft, first extend the outrigger swinging hydraulic cylinder 19 and press the bearing plate 20 of each outrigger 17, 18 against the shaft wall surface 1, so that the annular body 2 of the shaft excavation device is moved against the shaft wall surface. 1, and then swing the telescopic arm 27 with the arm swinging hydraulic cylinder 28 to position the rotary cutter 6 near the center of the bottom of the shaft. The telescopic arm 27 is extended by the cylinder 26, and the rotary cutter 6 is cut into hard ground such as rock at the bottom of the shaft to an appropriate depth.

Next, the annular support 4 is rotated by the rotation drive device 3 to excavate the ground at the bottom of the shaft in a circular manner, and the telescopic arm 27 is then swung outward to move the rotary cutter 6 a distance approximately equal to its diameter. After moving the annular support platform 4 for excavation, the annular support 4 is rotated again to excavate the hard ground at the bottom of the shaft in a circular manner, and this excavation operation is repeated as many times as necessary to excavate the bottom of the shaft to the maximum diameter. Do this.

When excavating the entire bottom of a shaft, instead of performing circular widening excavation as described above, the arm swinging hydraulic cylinder 28 swings the telescoping arm 27 outward to move the rotary cutter 6 to the bottom of the shaft. from a position near the center of the shaft to the largest diameter part at the bottom of the shaft,
Next, the annular support 4 is rotated by a certain angle to move the rotary cutter 6 around the shaft by a distance approximately equal to its diameter, and then the telescoping arm 27 is swung inward to move the rotary cutter 6 to the bottom of the shaft. The operation of moving the object to near the center may be repeated.

After completing the excavation of the entire bottom of the hole, the telescopic arm 2
7 and lower the scraping member 30 using the lifting hydraulic cylinder 31 to a position where its lower end is close to the bottom ground surface, and then rotate the scraping device 8 together with the annular support base 4 to the left and right. By rotating, each scraping device 8 pushes the excavated debris toward the lower part of the clamshell hoistway and piles it up.
Next, the annular support base 4 is rotated to a position where the center of the inner cylinder 33 and the center of the clam shell hoistway almost coincide with each other, and then the clam shell hoist 13 is operated to carry the excavated waste out of the mine by the clam shell 5. .
If any excavated debris remains at the bottom of the shaft, the scraping device will rotate to collect the excavated debris again and carry it out.

After completing the first full-scale excavation of the bottom of the shaft and carrying out the excavated waste, the telescopic arm 27 is extended to cut the cutter into the hard ground at the bottom of the shaft to an appropriate depth.
Thereafter, the entire bottom of the hole is excavated for the second and subsequent times and the excavated waste is carried out in the same manner.

After excavating until the extension stroke of the telescoping arm 27 reaches its maximum, the telescoping arm 27 is shortened and the outriggers 17 and 18 are rotated in the relaxing direction, and then the shaft excavation is carried out by the hoisting machine 12 for lifting and lowering the excavating equipment. After lowering the device a distance close to the telescoping stroke of the telescoping arm, outrigger 1
7 and 18 are tightened to fix the annular body 2 to the shaft wall surface 1, and the supporting frame material is carried into the shaft by the traveling hoist 14 to assemble the steel supporting frame 41, and then the above-mentioned process is carried out again. In this way, the entire bottom of the shaft is excavated and the excavated waste is carried out repeatedly.

After excavating the shaft to a predetermined depth, the outriggers 17 and 18 are rotated in the relaxing direction, and then the shaft excavation equipment is raised to the ground by the hoist 12 for lifting and lowering the excavation equipment.

In the case of the above-mentioned embodiment, the upper part of the scaffold/driver's cab 34 and the clamshell hoistway are separated by the inner cylinder 33, and a protective ceiling plate 37 is provided above the scaffold/driver's cab 34, so that the clamshell Safety can be ensured by preventing excavation debris spilled from 5 from falling onto the driver's cab.

Further, as in the above embodiment, if the scraping device 8 is provided on both sides of the swinging arm excavator 7 and the scraping device 8 is rotated to the left and right by the annular support base 4,
The integration time can be shortened compared to the case where one scraping device is provided. Furthermore, if the inclined outriggers 17 and 18 are used as in the embodiment, the outriggers can be easily installed even if the distance between the annular body and the shaft wall is small.

When carrying out this invention, as a means for fixing the annular body 2 to the shaft wall surface 1, an outrigger of a type other than that shown in the drawings may be employed.

According to this invention, after the excavation of the entire bottom of the hole is completed by the arm swinging excavator 7 having the telescoping arm 27 and the rotary cutter 6, the telescoping arm 27 of the arm swinging excavator 7 is shortened, and The scraping member 30 is lowered by the hydraulic cylinder 31 to a position where its lower end is close to the bottom ground surface, and then the scraping member 30 is lowered together with the annular support 4 into the scraping device 8 for central accumulation of excavated debris.
By rotating the raking device 8, the excavated debris at the bottom of the pit can be collected and piled up toward the center of the bottom, that is, the lower part of the clamshell hoistway. After excavation, the excavated debris can be quickly carried out by the clam shell 5, and the amount of excavated debris picked up by the clam shell 5 can be increased, and the number of times the clam shell must be raised and lowered back and forth can be reduced, so the time required to carry out the excavated debris can be greatly reduced. In addition, excavation of the entire bottom of the pit and removal of excavated debris can be performed safely and efficiently using mechanical power, and the raising and lowering hydraulic cylinder 31 can improve excavation efficiency. With the scraping member 30 raised, the swiveling motion of the annular support 4 and the swinging motion of the swinging arm excavator 7 having the rotary cutter 6 are performed in an appropriate combination. Effects such as being able to easily excavate with the swinging arm excavator 7 without getting in the way can be obtained.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a longitudinal side view showing a state in which a shaft is being excavated by a shaft excavation device, FIG. 2 is an enlarged longitudinal side view of the shaft excavation device, and FIG. Figure 3 is its front view, Figure 4
The figure is a cross-sectional view taken along the line A-A in Figure 2, Figure 5 is a longitudinal side view showing an enlarged part of Figure 2, and Figure 6 is a side view showing the relationship between the scraping device and the annular support. It is. In the figure, 1 is the shaft wall surface, 2 is the annular body, and 3
is a swing drive device, 4 is an annular support base, 5 is a clam shell, 6 is a rotating cutter, 7 is a swinging excavator, 8
10 is a scraping device for centrally collecting excavated waste, 11 is a foundation.
12 is a turret, 12 is a hoist for lifting the excavation equipment, 13 is a hoist for transporting the excavated layer outside, 14 is a traveling hoist for carrying in supporting frame materials, 17 and 18 are outriggers, 19
is a hydraulic cylinder for outrigger swing, 21 is an annular ball bearing, 22 is a pinion, 24 is an annular internal gear,
26 is a telescopic hydraulic cylinder, 27 is a telescopic arm,
28 is a hydraulic cylinder for swinging the arm, 29 is a holding member, 30 is a scraping member, 31 is a lifting hydraulic cylinder, 33 is an inner cylinder, 34 is a scaffold/operating platform, 36 is a control panel, and 37 is a ceiling plate. be.

Claims (1)

[Claims] 1 An annular support 4 that is rotated by a rotation drive device 3 is attached to an annular main body 2 fixed to a shaft wall 1, and an annular support 4 that moves up and down within the annular main body 2 and annular support 4 is attached. The upper end of the swinging arm excavator 7 having the telescoping arm 27 and the rotary cutter 6 and the upper end of the scraping device 8 for central accumulation of excavated debris are attached to the clam shell 5 at a position deviated laterally from the hoistway. , the scraping device 8
is composed of a vertical holding member 29, a scraping member 30 attached to the holding member 29 so as to be able to move up and down, and a lifting hydraulic cylinder 31 connecting the holding member 29 and the scraping member 30. A vertical shaft drilling device characterized by: