JPS5824091A - Shaft pit drilling apparatus - 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 relates to a highly efficient and economical shaft excavation device used for excavating a shaft for constructing the foundation of a steel tower or other structure or for other purposes. An object of the present invention is to provide a shaft excavation device that can excavate a shaft while ensuring the safety of the operator.

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

The drawing shows an embodiment of the present invention, in which a hand-dug shaft with a depth that allows the insertion of an excavation device is provided at a shaft penalty planned position in rock or other hard ground 9, and a hand-dug shaft is provided surrounding the hand-dug shaft. A turret supporting foundation 10 is provided, and on the top of the turret 11 fixed to the foundation 10, two hoisting machines 12 for unloading the excavation equipment and a hoisting machine 1 for transporting excavated waste out of the mine are installed. Roto, traveling hoist for transporting supporting frame material 1
4 is fixed, and the two excavation equipment lifting/lowering windings are fixed.
2 suspends and supports the left and right sides of the annular body 2 via a chain 15 and a hanging rod 16, and around the upper part of the annular body 2, an inclined outrigger 17 has an upper end extending in the radial direction of the annular body. It is attached so as to be able to swing freely, and around the lower part of the annular body 2 there is a slanted ridge (IJ gar 18).
The lower end of the annular body is attached so as to be swingable in the radial direction.
The intermediate part of each outrigger 17, 18 and the annular main body 2 are connected via a hydraulic cylinder 19 for swinging the outriggers, and the bearing platen 20 at the tip of each outrigger 17, 18 is pressed against the shaft wall surface 1. In particular, the annular body 2 is firmly fixed to the shaft wall 1 and supports the excavation reaction force.

At the lower end of the annular body 2, an annular support 4 is provided with an annular ball bearing 21.
A swing drive device 3 consisting of an electric motor and a speed reducer is fixed inside the annular main body 2, and a pinion 2 rotated by the drive device 3 is fixed inside the annular body 2.
2 is meshed with an intermediate gear 23, and the intermediate gear 2 is meshed with an annular internal gear 24 fixed to a rotating support base 4. At a position offset to the side from the hoistway of the clamshell 5 going up and down the
The arm-swinging excavator 7 has an upper end pivoted by a horizontal shaft 25 perpendicular to the radius line of the annular support base, and further includes a telescoping arm 27 that is extended and contracted by a telescoping hydraulic cylinder 26; A cutter drive consisting of a truncated circular drum-shaped rotary cutter 6 with a number of picks rotatably attached to the lower end of the cutter, and an electric motor and a speed reducer built into the telescopic arm 27 to drive the rotary cutter 6. The device (not shown) is connected to the middle part of the telescoping arm 27 and the support base 4 to a hydraulic cylinder 28 for swinging the near arm, 71. ing.

two scraping devices 8 for accumulating excavated debris, and the clamshell 5;
Each scraping device 8 is arranged on both sides of the swinging arm excavator 7 at a position offset laterally from the zero passage, and each scraping device 8 includes a vertical holding member 29 and a scraping device attached to the holding member 29 so as to be able to rise and fall freely. The pulling member 3o and the holding member 29o: the scraping member 30
The upper end of the holding member 29 is pivotally connected to the support base 4 by a horizontal shaft 62 perpendicular to the radius line of the rotating support base 33.4). , and the upper end of the holding member 29 is provided with a stone 'P29' located on the shaft wall side as well as the horizontal shaft 32, and the scraping device 8 is moved from the almost vertical position shown by the solid line in FIG. Although it can rotate in the direction A, it cannot rotate in the direction of arrow B, that is, outwardly, because the stone 929' hits the annular support 4.

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 66 surrounding the clamshell hoistway is fixed to the annular support 4, and is further arranged on the upper part of the annular main body 2. The annular scaffold/driver platform 64 is fixed to the inner cylinder 36, and when the annular support platform 4 is rotated, the swinging arm excavator 7. Scraping device for accumulating excavated debris 82 Scaffold/driving platform 64 and inner cylinder 36
etc. also rotate at the same time.

The scaffold/driver's cab 34 has a control panel 6 having a television 65.
6 is fixed, and an annular ceiling plate 67 provided above the scaffold/operator's cab 34 is fixed to the upper end of the inner cylinder 33, and furthermore, due to the eccentricity between the clamshell hoistway and the annular body, the annular ceiling plate 67 is fixed to the annular body 2. In the storage chamber 68 created between the inner cylinder 3,
The swing drive device 3 and a hydraulic unit 3 that operates each part.
9 and other control equipment (not shown) are accommodated therein, and the swinging arm excavator 7 is disposed so as to be located below the largest middle portion of the accommodation chamber 38.

,! A television camera 40 is attached to the lower part of the 7τ-shaped support 4, allowing operation to be carried out while observing the condition of the bottom excavation section by the rotary cutter 6 and the catching of excavated debris by the Kushimshiel 5VrC on the television in the driver's seat. can.

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 support plate 20 of each outrigger 17, 18 against the shaft wall 1, thereby moving the annular body 2 of the shaft excavation equipment. It is firmly fixed to the shaft wall surface 1, and then the telescopic arm 2 is moved by a hydraulic cylinder 28 for swinging the arm.
7 to position the rotary cutter 6 near the center of the bottom of the shaft, the rotary cutter 6 is rotated, and the telescopic arm 27 is extended by the telescopic hydraulic cylinder 26.
A rotary cutter 6 is made to cut into hard ground such as rock at the bottom of a shaft to an appropriate depth.

Next, by rotating the annular support base 4 using the rotation drive device 3, the ground at the bottom of the shaft is excavated in a circular manner, and then the telescoping arm 27 is swung outward to move the rotary cutter 6 a distance approximately equal to its diameter. After excavating and moving the shaft, the annular support 4 is rotated again to excavate the hard ground at the bottom of the shaft in a circular manner.Such excavation operation is repeated as many times as necessary until the bottom of the shaft has a maximum diameter of 1. Carry out excavation.

When excavating the entire bottom of a shaft, instead of performing circular expansion 1J excavation as described above, the arm swinging hydraulic cylinder 28 swings the telescopic arm 27 outward, and the rotary cutter 6 is moved to the bottom of the shaft. The rotary cutter 6 is moved from a position near the center of the shaft by the maximum diameter section at the bottom of the shaft, and then the annular support 4 is rotated by an angle to move the rotary cutter 6 in the direction around the shaft by a distance approximately equal to its diameter. The operation of swinging the arm 27 inward and moving the rotary cutter to near the center of the bottom of the shaft may be repeatedly performed.

After completing the excavation of the entire bottom of the pit, move the telescopic arm 27 and the scraping member 60 to a position where its lower end is close to the bottom ground surface and lower it, then turn the scraping device 8 together with the original support base 4 to the left and right. By rotating, each scraping device 8 pushes the excavated debris toward the bottom of the clamshell hoistway into a pile, and then the annular support 4 is moved between the center of the inner cylinder 63 and the center of the clamshell hoistway. Then, the clamshell winder 1 is operated to carry the excavated waste out of the mine using the clamshell 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 removal of excavated debris, extend the telescopic arm 27 and cut the cutter into the hard ground at the bottom of the shaft to an appropriate depth. Excavation of the entire bottom surface and removal of excavated waste will be carried out.

(IM-y-arm 27: Excavate until the extension stroke reaches the maximum, then shorten the telescopic arm 27 and move the IJ arm 27 in the relaxing direction. Then, move the excavator up and down. After lowering the shaft excavation equipment by a distance close to the telescopic stroke of the telescopic arm using the hoisting machine 12, the outriggers 17 and 18 are tensioned to lower the annular body 2.
is fixed to the shaft wall 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 entire bottom of the shaft is Excavation and removal of excavated debris are repeated.

After excavating the shaft to a specified depth, each outrigger 17
.

In the case of the embodiment described above, the upper part of the scaffold/driver's cab 34 and the clamshell hoistway are partitioned by the inner cylinder 33, and a protective ceiling plate 67 is provided above the scaffold/driver's cab 64, so that Safety can be ensured by preventing excavated debris spilled from the clamshell 5 from falling onto the driver's cab.

As in the above-mentioned embodiment, the raking device 8 is provided on both sides of the swinging arm excavator 70, and the raking device 8 is mounted on the ]-shaped support base 4.
By turning the raking device to the left and right, the integration time can be shortened compared to the case where one raking device is provided. Furthermore, as in the above embodiment, the inclined outriggers 1
7 and 18, the IJ gar 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, the annular body 2 fixed to the shaft wall surface 1
An annular support 4 that is rotated by a rotation drive device B is attached to the ma-large support 4, and a ring that extends laterally from the hoistway of the clamshell 5 that ascends and descends within the annular main body 2 and the annular support 4. In the deviated position, the upper end of the swinging arm excavator 7 having the rotary cutter 6 and the upper end of the excavated debris accumulating stopper device 8 are attached, so that the rotation movement of the GJ-shaped support base 4 and By appropriately combining the swinging motion of the swinging arm excavator 7 with the rotary cutter 6, it is possible to excavate a vertical shaft of any pile diameter in hard ground with high efficiency and economically using mechanical power. Moreover, since the main body 2 and the support base 4 are annular, their interiors can be used as a clamshell passage, and furthermore, when the annular support base 4 is rotated, the excavated waste attached to it can be removed. The collecting scraping device 8 is also automatically rotated, and the scraping device 8 collects the excavated debris at a fixed position on the center side of the bottom of the shaft, thereby increasing the amount of excavated debris picked up by the clamshell 5. As a result, the number of times the clamshell is raised and lowered back and forth can be reduced, and therefore the time required for transporting excavated debris can be greatly shortened and excavation efficiency can be improved. In addition, in the case of the conventional shaft excavation method, workers had to go down to the bottom of the pit, set the fragmentation explosives, and after detonation, the workers used shovels to shovel debris into the gable and discharge it. This invention requires harsh work and there is a risk of falling rocks from above, which poses a safety problem.However, in the case of this invention, there is no need for the worker to go down to the bottom of the mine, and the excavated waste can be transferred to the clamshell 5. Since it is transported out, there are benefits such as no need to worry about security.

[Brief explanation of the drawing]

The drawings show one 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 6 is a front view, Figure 4 is a sectional view taken along line A-A in Figure 2,
Figure 5 is an enlarged vertical side view of a part of Figure 2;
The figure is a side view showing the relationship between the scraping device and the annular support base. In the figure, 1 is a shaft wall surface, 2 is an annular main body, 6 is a swing drive device, 4 is a support stand, 5 is a clamshell, 6 is a rotary cutter, 7 is a swinging excavator, and 8 is a scraper for accumulating excavated waste. side device,
10 is the foundation, 11 is the turret, 12 is the hoisting machine for lifting and lowering the excavation equipment,
16 is a hoisting machine for transporting excavated waste outside the mine, 14 is a traveling hoisting machine for carrying in supporting frame materials, 17 and 18 are outriggers, 119 is a hydraulic cylinder for swinging outriggers, 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, 3° is a scraping member, and 31 is for lifting/lowering. Hydraulic cylinder, 63. The inner cylinder, 64 is a scaffold/driver's cab, 66 is a control panel, and 67 is a ceiling plate. -to-111111-491-

Claims (1)

[Claims] An annular main body 2K fixed to the shaft wall surface 1 is attached to an annular support stand 4 which is rotated by a turning drive device B, and the annular main body 2 and an annular support stand 4 are raised and lowered to the annular support stand 4. An oscillating arm excavator 7 having a rotary cutter 6 at a position laterally offset from the hoistway of the clamshell 5
A shaft excavation device characterized in that an upper end portion and an upper end portion of a scraping device 8 for accumulating excavated debris are attached.