JPH04315699A - Mucking method for tunnel construction - Google Patents

Abstract

PURPOSE:To shorten the scraping/loading time of muck and prevent an excavating/loading machine from being overturned or colliding with a dump truck, a tunnel inner wall or a worker. CONSTITUTION:An excavating/loading machine 4 vertically swayably fitted with a boom 8, an arm 9 and a bottom dump type bucket 3 on a rotating upper vehicle body 7 is stopped near a working face 2. The boom 8, arm 9 and bucket 3 are vertically swayed to scrape muck, and the upper vehicle body 7 is rotated to move the bucket 3 on a vessel 10. The bucket 3 is bottom-dumped to load the muck into the vessel 10 of a dump truck 5, and the upper vehicle body 7 is again rotated to scrape muck. A series of these actions are continuously repeated to load muck into the vessel 10 of the dump truck 5.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing tunnels, such as mountain tunnels, in which a series of operations including rock drilling, blasting, shearing, and support assembly are carried out in sequence.

0002

[Prior Art] In tunnel construction, in which a series of operations such as rock drilling, blasting, shearing, and shoring assembly are performed in order, the shear of rock fragments, earth, etc. that have been cut down by drilling, blasting, etc. The shearing operation for carrying out is the main factor controlling the tunnel excavation speed. Various methods are known for carrying out such offset work. For example, there is a known construction method in which shear is loaded into a vessel of a dump truck using a wheel-type excavator and loader equipped with a side dump bucket.

0003

[Problems to be Solved by the Invention] In the above-mentioned offset construction method, there is a process in which the wheel type excavator and loader scoops the shear into the bucket, a process in which it is transported to a dump truck, and a step in which the bucket is transferred to the side dump truck. There is a loading process and a process of running empty until the shear is reached, which increases the time it takes for the wheel excavator to scoop and load the shear, and when the wheel excavator travels back and forth between the scooping position and the loading position multiple times. Tires may run on debris scattered near the face and fall over, or the vehicle may collide with the dump truck, the inner wall of the tunnel, or workers inside the tunnel due to the narrow running width of the vehicle because it runs in a narrow tunnel and is loaded parallel to the dump truck. This is extremely dangerous. In addition, the dumping reach of the side dump bucket is short, and since the dump truck is loaded into the vessel from the side of the dump truck, it is difficult to load the shear into the vessel evenly in the width direction.
The bucket and vessel are likely to interfere and damage the bucket and vessel.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a method of offset construction in tunnel construction that can solve the above-mentioned problems.

[0005]

[Means for solving the problem] An excavation loading machine with a bottom dump type bucket that can be vertically oscillated and rotated is stopped near the face, the bucket is vertically oscillated and swiveled to scoop up shear, and then dumped. A shearing method that loads shear into the dump truck's vessel by repeating loading operations into the truck's vessel.

[0006]

[Operation] Since the bucket scoops and loads the shear by vertically swinging and rotating, the time for scooping and loading the shear can be shortened, and it prevents the excavation and loading machine from colliding with the dump truck, tunnel inner wall, and workers. Moreover, by moving the bucket to any position in the vessel, the shear can be evenly loaded into the vessel.

[0007]

[Example of implementation] As shown in Figures 1, 2, and 3, a rotating excavation pile is installed with a bottom dump type bucket 3 located near the face 2 of the tunnel 1 on one side of the tunnel center after the face is blown up. The loading machine 4 travels and stops, and the dump truck 5 moves toward the opposite side of the center of the tunnel of this excavating and loading machine 4.
Run and stop. The excavation and loading machine 4 has an upper body 7 attached to a crawler type traveling body 6 so as to be able to rotate 360 degrees, a boom 8 attached to the upper body 7 so as to be able to swing vertically, and a bottom dump type bucket 3 attached to the boom 8. An arm 9 is attached so as to be able to swing up and down. Turn the upper body 7 so that the bucket 3 faces the face 2, and move the boom 8 and arm 9.
At the same time as the bucket 3 is moved up and down, the bucket 3 is scooped up to scoop up the waste, and while the upper vehicle body 7 is turned 90 degrees, the bucket 3 is moved upward as shown in FIGS. 4 and 5.
is moved onto the vessel 10 of the dump truck 5, the bucket 3 is bottom dumped, and the shear is loaded into the vessel 10, and then the upper body 7 is turned 90 degrees and
The position is shown in FIG. This operation is repeated to load the shedding into the vessel 10 of the dump truck 5, and when the vessel 10 of the dump truck 5 is full, the dump truck 5 is driven to transport the shedding out of the tunnel.

Next, a comparative example will be explained. When excavating a tunnel with the cross-sectional shape shown in Fig. 3 and a cross-sectional area of 95 m2, a conventional construction method using a WA600 wheel loader manufactured by Komatsu Ltd. (bucket capacity 4.2 m3) was used as an excavation and loading machine. The bucket loading capacity is approximately 3.36 m3 per minute, and the shift time is approximately 19
It was 3 minutes. In other words, the shear time is the amount of shear in one day divided by the bucket loading capacity, and the amount of shear in one day is 6.
Since the area was 50m3 and the bucket loading capacity was 3.36m3, the unloading time was approximately 193 minutes. On the other hand, as a result of using Komatsu Ltd.'s PC400-5 loading shovel (bucket capacity: 2.6m3) as an excavation and loading machine and using the method described above, the bucket loading capacity was approximately 6.5 m3 per minute. It was large at 3m3, and the start-up time was 103 minutes. This also shows that the above-mentioned offset construction method can shorten the offset time.

Further, as shown by the imaginary line in FIG. 4, the tamp truck 5 is made to stand by behind the excavation loading machine 4, and after the dump truck 5 fully loaded with shear has traveled as described above, the dump truck 5 is placed in the waiting position as described above. The shear may be loaded into the vessel 10 of the dump truck 5, and during this time, another dump truck 5 may be driven to the side of the excavation loading machine 5 and placed on standby. In this way, the time for the excavation and loading machine 5 to hold the dump truck 5 is eliminated, so that the dumping can be carried out more efficiently and in a shorter time. Further, as shown in FIG. 6, the excavation loading machine 4 is positioned above the center of the tunnel 1, and the dump truck 5
may be positioned behind the excavation loading machine 4 and above the center of the tunnel to load the shear. In this way, there is a sufficient gap between the excavation loader 4 and the dump truck 5 and the left and right tunnel inner walls, improving worker safety.

0010

[Effects of the Invention] Since the excavation and loading machine 4 is scooped and loaded by turning without running, the time for scooping and loading shedding can be shortened, and the time for shearing can be shortened, and the excavation and loading machine It is safe because the bucket 4 does not fall or collide with the dump truck, the tunnel inner wall, or the workers in the tunnel. Furthermore, by adjusting the turning angle of the excavation loading machine 4, the bucket 3 can be moved into the vessel of the dump truck 5. The bucket 3 and the vessel 10 can be moved to any position 10 to uniformly load shear into the vessel, and the bucket 3 and the vessel 10 will not be damaged due to interference.

[Brief explanation of drawings]

FIG. 1 is a plan view of a scooped-in state.

FIG. 2 is a front view of the scooped-in state.

FIG. 3 is a side view of the scooped-in state.

FIG. 4 is a plan view in a loaded state.

FIG. 5 is a side view in a loaded state.

FIG. 6 is a plan view of the scooped-in state of another offset construction method.

[Explanation of symbols]

1 tunnel, 2 face, 3 bucket, 4
Excavation loader, 5 dump trucks, 10 vessels.

Claims (1)

[Claims] [Claim 1] A rotating excavation loading machine 4 equipped with a bottom dump type bucket 3 is stopped near the face 2, and the bucket 3 of this excavation loading machine 4 scoops up shedding and rotates it. Bucket 3 Dump Truck 5 Vessel 1
In this state, the bucket 3 is bottom dumped to load the shear into the vessel 10, and the bucket 3 is rotated again and the shear is scooped up by the bucket 3. This series of operations is repeated several times in succession to dump the shear into the dump truck 5. A shearing method in tunnel construction, characterized in that the shear is loaded into a vessel 10 and transported by a dump truck 5.