JP2509494B2 - Rock cutting powder removal device for rock semi-shielding machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to rock semi-finishing work at the same time when excavating a rock tunnel, when transporting and removing rock cuttings and rock chips cut by a cutter from the tunnel through the head chamber. The present invention relates to an apparatus for removing rock cutting chips accumulated in a space between a lower body of a skin plate of a shield machine and a tunnel excavation surface, and transporting and removing the rock cutting chips through a head chamber to the outside of the tunnel.

[0002]

[Prior Art] Conventionally used for excavation work of rock tunnel
Rock debris removal device for rock semi shield machine
It is to cut rock cuttings and rock cuttings with a cutter, after capturing該岩shavings and該岩cutting chips to the head chamber,該岩cuttings the mud from Okudoro tube locking Semi shield machine or該岩An apparatus has been used in which the rock cutting fragments and the muddy water mixed with the rock cutting powder mixed with the cutting powder are conveyed to the outside of the tunnel through a mud discharge pipe. Excavation of rock tunnel
The conventional rock semi-shielding machine's rock cutting powder removal device used for work is equipped with a device for removing the rock cutting powder accumulated in the space between the lower body of the skin plate and the tunnel excavation surface of the lock semi-shielding machine. Was not done. Bedrock ton
Although not applicable to flannel excavation work, a similar example is
For the propulsion device used for the earth and sand excavation work of
A method of injecting muddy water or mud into the gap between the equipment and the ground is known.
ing. (JP-A-61-274084 and Shokai Kaisho)
(See JP 61-68193).

[0003]

[Problems to be Solved by the Invention]Excavation work of rock tunnel
Rock cutting powder removal of conventional rock semi shield machine used in industry
In the device, Rock cutting pieces cut by a cutter
And rock cutting powder are taken into the head chamber and
The muddy water from the mud pipe of the Mishield machine
Slurry and stir the powder to mix the rock cuttings and rock cutting powder into muddy water.
Mixed with the muddy water mixed with the rock cutting pieces and the rock cutting powder,
Adopted an operating system that transports and removes the material outside the tunnel with a mud pipe.
It was used, but it is difficult to transport it completely and
Lower part of skin plate near cutter while rock cutting powder is rotating
Avoid pressure buildup in the air gap between the fuselage and the tunnel excavation surface
I couldn't. Rock semi sea during rock tunnel excavation
As the rubbing machine advances, the rock cutting powder that has been pressed is rock semi.
Shield machine skin plate lower fuselage and tunnel excavation surface
Covered the entire void between. For example, in the case of a horizontal shaft, the third
This is as shown in FIG. This allows rock semi
It is not possible for the shield machine to maintain level as it moves forward.
Performance, resulting in increased frictional resistance and lack of propulsion.
Then, there was a problem that it eventually stopped.Actual Kaisho 6
Rock the technology of the propulsion device described in Japanese Patent Publication No. 1-68193
Applies to rock semi-shielding machines for tunnel excavation work
Then, the rock semi shield machine excavated the rock tunnel.
Directly carry mud water from the mud pipe to the head chamber.
Instead of sending it, all the mud is transported by bypassing the branch mud pipe.
The lower body of the skin plate of the lock semi shield machine
Rocks over the entire void between the tunnel and the excavated surface
It does not have a function to remove cutting powder with muddy water.
In addition, the mud pressure for removing rock cutting powder was insufficient, and
Sometimes it cannot be removed with water, According to
It becomes impossible to maintain a high level, increasing the frictional resistance.
It will cause a lack of propulsion force and eventually stop
It has a problem and is disclosed in JP-A-61-274084.
Only mention the existence of those that fall under the branch mud pipe.
, There is no mention of the existence of the corresponding mud pipe.
However, it is functionally necessary to install the mud pipe, and of course
Therefore, I have to conclude that the mud pipe exists.
Therefore, for this reason, the above in Japanese Utility Model Laid-Open No. 61-68193
It had the same problems as those described above.
still,And the injection tube described in JP-A-61-274084.
Was determined to correspond to the branch mud pipe of the present invention. Mud pipe
Is an external transmission located at the rear of the lock semi shield machine.
Combined with the mud pipe, the lock semi shield from the external mud pipe
Install a main pipe into which mud flows into the machine head chamber.
U. A branch mud pipe is a rock semi pipe that branches from the mud pipe.
Of the lower fuselage skin plate and tunnel excavation surface
A supplemental tube leading to the space between. Also, Rock semi shield
Strictly speaking, the equipment is designed to have a planned water transfer gradient (1/2
It moves forward while excavating according to a gradient of about 00)
If you look at it normally, it is normal to keep horizontal and move forward
Since it can be considered that there is, "Rock semi shield
It is normal for the machine to maintain level and move forward.
From this macroscopic point of view. JP
Sho 61-274084 and Japanese Utility Model Sho 61-68193.
Rock tunnel excavation using the propulsion device technology described in the publication
When applied to work lock semi-shielding machines, the propulsion equipment
The muddy water or mud in the storage is used for excavating sediment or gravel,
The force is weak and therefore the lock for rock tunnel excavation work
The muddy water pressure of the semi-shielded machine will inevitably decrease,
The rock semi shield machine is
Lock semi-seal according to the progress of the semi-shield machine
Between the lower fuselage of the aircraft skin plate and the tunnel excavation surface
Remove the rock cutting powder that has been compressed by covering the entire void with muddy water
It is impossible to maintain the level as you move forward.
Performance, resulting in increased frictional resistance and lack of propulsion.
Then, there was a problem that it eventually stopped. the above
In any case ofPropulsion resistance of lock semi shield machine
In response to the increase in
・Hume tube for propulsion (hereinafter referred to as "fume tube")And other
Lock semi-seal with increasing propulsion power of intermediate propulsion device
Uneven wear of the cutter of the machine, damage of the fume pipe end,
After the completion of construction, the progress of the excavation work is reduced due to cracks in the pipe
There was a problem that it led to lack of quality and function. Mosquito
When the rotor is exhausted, the propulsion speed of the lock semi shield machine
Had a problem of being extremely reduced. The present invention is
Under the skin plate of the lock semi-shielded machine mentioned above
Rock cutting powder is pressed into the space between the body and tunnel excavation surface
To eliminate the phenomenonDeploy a branch mud pipe and open the mud pipe.
It has a closing valve and a branch mud pipe opening / closing valve.,C
For the purpose of providing a rock cutting powder removal device for a cold machine
There is.

[0004]

In order to achieve the above object, a rock cutting powder removing device of a lock semi-shielding machine according to the present invention comprises a mud pipe, a mud conveying device, a mud pipe and a mud conveying device. ,
It consists of a branch mud pipe and is installed in the lock semi shield machine. In addition, the mud conveying device and the sludge conveying device are
It may be provided separately from the above-mentioned rock cutting powder removing device, but it is functionally the same. The mud pipe is a pipe provided in the lock semi-shielding machine, and the mud pipe is provided with a valve for opening and closing the mud pipe. One end of the mud pipe is arranged at the rear part of the lock semi-shielding machine and is connected to an external mud pipe that flows mud water from outside the tunnel. The other end of the mud pipe is located in the head chamber of the lock semi shield machine. The valve for opening and closing the mud pipe is provided on the mud pipe near the head chamber. Bar for opening and closing the mud pipe
It is possible to send and stop the mud water in the mud pipe by opening and closing the valve.
it can. The mud transporting device is composed of a machine for transporting mud in the mud transporting pipe and a device for driving the machine. The sludge pipe is installed in the lock semi shield machine. One end of the sludge pipe is arranged in the head chamber of the lock semi shield machine. The other end of the mud discharge pipe is arranged at the rear part of the lock semi-shielding machine and is connected to an external mud pipe that conveys mud mixed with rock cutting pieces and rock cutting powder to the outside of the tunnel. The sludge conveying device is composed of a machine for conveying muddy water mixed with rock cutting pieces and rock cutting powder in a mud pipe and a device for driving the machine. The branch mud pipe is a pipe that branches from the mud pipe and penetrates the lower body of the skin plate of the lock semi-shielding machine to reach the outside of the machine.The branch mud pipe is provided with a valve for opening and closing the branch mud pipe. ing. The branch point from the mud pipe to the branch mud pipe is on the side of the head chamber opposite to the valve for opening and closing the mud pipe. By opening and closing the branch mud pipe opening / closing valve,
It is possible to send and stop the muddy water in the conduit pipe. Branch mud pipes are often thinner than mud pipes. One branch mud pipe
In many cases, a plurality of mud pipes branch from a book. Among the branch mud pipes, the pipe length outside the lock semi-shield machine is extremely short, and is almost equal. Mud pipe (bar for opening and closing the mud pipe
(Including lube), mud transporter, sludge pipe, sludge transporter and
And the branch mud pipe (including the valve for opening and closing the branch mud pipe)
Excavation of earth and sand for use in excavation work of a panel tunnel
Compared to those used for work, those for high pressure are generally
Used . In addition to the rock cutting powder removing device of the present invention, a cutter (commercial item) is arranged in the rock semi-shielding machine. In order to propel the lock semi shield machine, an original pushing device (commercially available product) is provided behind the lock semi shield machine.

[0005]

[Operation] In the rock cutting powder removing device of the lock semi-shielding machine configured as described above, the mud pipe opening / closing valve and the branch mud pipe opening / closing valve are closed, and the mud conveying device, the sludge conveying device, and the cutter First, tunnel work for excavating a side shaft in rock will be described as follows from a stationary state in which (commercial item) is stopped and no propulsive force is applied to the original pushing device (commercial item) of the lock semi-shielding machine. The rock semi-shielding machine is moved to the rock part to be excavated, and the cutter of the rock semi-shielding machine is brought into contact with the rock mass. Open the valve for opening and closing the mud pipe.
It drives the mud transport device and the sludge transport device. Muddy water flows into the mud pipe from the connected external mud pipe. At the same time, to excavate the rock tunnel, the cutter is rotated to cut the rock in front. When propulsive force is applied to the original pusher, the lock semi-shielded machine moves forward. The cut rock is in the state of rock cutting pieces and rock cutting powder, and the rock cutting pieces and the rock cutting powder are taken into the head chamber of the lock semi-shielding machine through an opening provided in the cutter. The mud water is sent and stirred from the mud pipe to the rock cutting pieces and rock cutting powder taken into the head chamber. The muddy water that is sent is the rock in the bedrock tunnel.
Since it is used to convey cutting chips and rock cutting powder, it is necessary to dig underground soil.
Compared with the case of cutting work, the one with considerably high pressure is used.
It In the case of rock tunnel excavation work, rock cuttings and rocks
Since it is used to convey cutting powder, it requires a considerably large muddy water pressure.
On the other hand, the earth excavation work (mainly
In case of muddy water propulsion method), prevent landslides and grease
For the effect, fill the gap between the propulsion pipe and the ground with mud or mud.
This is because if they are satisfied, they will reach their goals. Rock cuttings and rock cutting powder are mixed in muddy water. The rock cuttings and rock cutting powder mixed in the muddy water are transported into the sludge discharge pipe together with the muddy water, and are transported to the outside of the tunnel through the coupled external sludge discharge pipe to be removed. By repeating this cycle, the rock semi shield machine advances and excavates a tunnel in rock. Eventually, the remaining rock cutting powder that was gradually pressed into the gap between the lower body of the skin plate of the lock semi-shielding machine and the tunnel excavation surface increased the friction resistance of the lock semi-shielding machine and increased the jack pressure of the original pusher. Raise it and prevent the advance of the lock semi shield machine. In order to prevent this state from blocking the forward movement of the lock semi-shielding machine, the residual rock cutting powder gradually accumulated in the gap between the lower body of the skin of the lock semi-shielding machine and the tunnel excavation surface locks. Open the branch mud pipe opening / closing valve before it interferes with the forward movement of the semi shield machine. The residual rock cutting powder that was gradually pressed into the space between the lower body of the skin of the rock semi shield machine and the excavated surface of the tunnel is removed by the pressure of the mud sent from the branch mud pipe, and stirred and mixed into the mud. Then, it is carried into the sludge discharge pipe through the head chamber together with the muddy water, and then transferred to the outside of the tunnel through the external sludge discharge pipe connected to the muddy water pipe. While using the branch mud pipe, close the valve for opening and closing the mud pipe and do not send mud directly from the mud pipe to the head chamber.All mud water bypasses the branch mud pipe to the head chamber. In some cases, an operation system that sends mud is adopted. In addition, while the branch mud pipe is being used, the valve for opening and closing the mud pipe may be shifted from fully open to a slightly closed side to reduce the amount of mud sent directly from the mud pipe to the head chamber. Since the length of the branch mud pipe outside the lock semi-shield machine is not very short, it does not hinder the normal forward movement of the lock semi-shield machine. The tunnel work for excavating the vertical shaft in the bedrock is the same as the tunnel work for excavating the side shaft in the bedrock, and a description thereof will be omitted.

[0006]

EXAMPLE The rock cutting powder removing device of the rock semi-shielding machine of this example is composed of a mud pipe 1, a mud conveying device, a mud pipe 2, a mud conveying device, and a branch mud pipe 3. . In this embodiment, of the rock cutting powder removal device of the lock semi shield machine,
The mud transporting device and the sludge transporting device are configured separately from the rock cutting powder removing device main body. Fig. 1 and Fig. 2 show that the rock cutting powder removal device main body except the mud transportation device and the sludge transportation device which are separate components of the rock cutting powder removal device of the lock semi shield machine is incorporated in the lock semi shield device. The arrangement is shown. The mud pipe 1 is a pipe provided in the lock semi-shielding machine, and the mud pipe 1 is provided with a valve 7 for opening and closing the mud pipe. One end of the mud pipe 1 is arranged at the rear part of the lock semi-shielding machine, and is connected to an external mud pipe 9 into which mud water flows from outside the tunnel. The other end of the mud pipe 1 is arranged in the head chamber 4 of the lock semi shield machine. The mud pipe opening / closing valve 7 is provided on the mud pipe 1 near the head chamber 4. The mud conveying device is composed of a machine for conveying the mud in the mud pipe 1 and a device for driving the machine. The mud transporting device is provided in the middle part of the external mud transporting pipe 9. The sludge discharge pipe 2 is provided in the lock semi shield machine. One end of the sludge pipe 2 is arranged in the head chamber 4 of the lock semi shield machine. The other end of the mud discharge pipe 2 is arranged at the rear part of the lock semi-shielding machine, and is connected to an external mud pipe 10 that conveys muddy water mixed with rock cutting pieces and rock cutting powder to the outside of the tunnel. The sludge transporting device is composed of a machine for transporting muddy water mixed with rock cutting pieces and rock cutting powder in the sludge discharging pipe 2 and a device for driving the machine. The sludge carrier device is provided in the middle part of the external sludge pipe 10. The branch mud pipe 3 is a pipe that branches from the mud pipe 1 and penetrates the skin plate lower body 6 of the lock semi-shielding machine to reach the outside of the machine. The branch mud pipe 3 has a branch mud pipe opening / closing valve. 8 are provided. As shown in FIGS. 1 and 2, there are two branch points from the mud feed pipe 1 to the branch mud feed pipe 3, and two branch mud feed pipes 3 are provided at each branch point. It is arranged only on the side opposite to the head chamber when viewed from the pipe opening / closing valve 7. The branch mud pipe 3 is thinner than the mud pipe 1. The length of the branch mud pipe 3 outside the lock semi-shielding machine is extremely short and almost equal. The front part of the lock semi-shielding machine is composed of a cutter 5 (commercially available product), and the cutter 5 is provided with an opening capable of sufficiently taking in rock cutting pieces and rock cutting powder into the lock semi-shielding machine. A rotary disk cutter is used as the cutter 5 (commercial item) of the lock semi-shielding machine. A fume tube (commercially available) is directly connected to the rear part of the lock semi shield machine. When connecting multiple Hume pipes, an intermediate propulsion device (commercially available) is connected to the Hume pipe connection.
Is provided. An extruding device (commercially available product) is connected to the rear part of the last fume tube.

In the rock semi-shielding machine and the rock cutting powder removing apparatus of the rock semi-shielding machine configured as described above, the mud pipe opening / closing valve 7 and the branch mud pipe opening / closing valve 8 are closed, and the mud transporting device. -A tunnel work for excavating a side shaft in rock will be described as follows from a stationary state in which the sludge transporting device / cutter 5 is stopped and no propulsive force is applied to the original pushing device. Since a rotary disk cutter is used in the case of the present embodiment, "cutting" is "crushing", "rock cutting piece" is "rock crushing piece", and "rock cutting powder". Is more accurate to describe as "rock crushed powder", but to unify the terms as a whole and facilitate understanding,
Also in this embodiment, the terms "cut", "rock cutting pieces", and "rock cutting powder" are used. Then, it demonstrates below.
The rock semi-shielding machine is moved to the rock part to be excavated, and the cutter of the rock semi-shielding machine is brought into contact with the rock mass. Open the valve 7 for opening and closing the mud pipe. It drives the mud transport device and the sludge transport device. The mud water flows from the coupled external mud pipe 9 into the mud pipe 1. At the same time, for excavating the rock tunnel, the cutter 5 is rotated to cut the rock in front. When propulsive force is applied to the original pushing device, the propulsive force advances the lock semi-shield machine through the intermediate propulsion device and the fume tube. The cut rock is in the state of rock cutting pieces and rock cutting powder, and the rock cutting pieces and the rock cutting powder are taken into the head chamber 4 of the lock semi-shielding machine through the opening provided in the cutter 5. . The mud water is sent and stirred from the mud pipe to the rock cutting pieces and the rock cutting powder taken into the head chamber 4. Rock cuttings and rock cutting powder are mixed in muddy water. The rock cuttings and rock cutting powder mixed in the muddy water are carried into the mud discharge pipe 2 together with the muddy water, and are carried / excluded from the tunnel through the connected external mud discharge pipe 10. By repeating this cycle, the rock semi shield machine advances and excavates a tunnel in rock. Eventually, the lower body of the skin plate of the rock semi shield machine 6
The residual rock cutting powder 11 that has been gradually pressed into the space between the tunnel excavation surface 12 and the tunnel excavation surface 12 increases the friction resistance of the lock semi-shielding machine, increases the jack pressure of the original pusher, and advances the lock semi-shielding machine. To prevent it. In order to prevent this state from blocking the forward movement of the lock semi-shielding machine, residual rock cutting powder gradually pressed into the gap between the lower skin plate body 6 of the lock semi-shielding machine and the tunnel excavation surface 12 is prevented. 11 opens the branch mud pipe opening / closing valve 8 before it interferes with the forward movement of the lock semi shield machine. Residual rock cutting powder 11 that has been gradually pressed into the gap between the lower skin plate body 6 of the rock semi-shielding machine and the tunnel excavation surface 12 is removed by the pressure of the muddy water sent from the branch mud pipe 3 to remove the muddy water. Agitated and mixed with the muddy water, and is conveyed into the sludge discharge pipe 2 through the head chamber 4 together with the muddy water, and is conveyed to the outside of the tunnel through the external sludge discharge pipe 10 connected to the sludge discharge pipe 2.
Will be eliminated. While the branch mud pipe 3 is in use, the mud pipe opening / closing valve 7 is closed and the mud water is not directly fed from the mud pipe 1 to the head chamber 4, but all the mud water bypasses the branch mud pipe 3. In some cases, an operation system in which the mud is sent to the head chamber 4 is adopted. Since the pipe length of the branch mud pipe 3 outside the lock semi-shield machine is not extremely short, it does not hinder the normal forward movement of the lock semi-shield machine.

[0008]

Since the present invention is constructed as described above, it has the following effects. Obedience
Since the branch mud pipe was attached to the rock cutting powder removal device of the conventional lock semi shield machine, the residual rock cutting powder that was pressed into the gap between the lower body of the skin plate of the rock semi shield machine and the tunnel excavation surface was removed, It has become possible to eliminate the frictional resistance due to the rock cutting powder, maintain the lock semi-shielding machine horizontally, and maintain the excavation propulsion force of the lock semi-shielding machine. Japanese Utility Model Publication No. 61-68193
The propulsion device technology described in
When applied to the lock semi shield machine of
During the excavation of the rock tunnel, the shielded machine was
Do not send muddy water directly to the dead chamber
By transporting all the muddy water by bypassing the mud pipe,
Of the lower fuselage skin plate and tunnel excavation surface
The rock cutting powder that has been pressed to cover the entire space between
It does not have the function to remove
The mud pressure is insufficient and rock cutting powder may be removed with mud.
In some cases, it may not be possible to maintain the level as you move forward.
Is not possible, resulting in increased frictional resistance and lack of propulsion.
Has the problem that it will eventually stop, and
For Kai 61-274084, use a branch mud pipe.
Only the existence of applicable items is described, and it corresponds to the mud pipe.
Although the existence of things is not described, it is necessary to install a mud pipe.
Is functionally necessary, and it is concluded that there is another mud pipe.
Therefore, in the case of Japanese Utility Model Laid-Open No. 61-68193,
However, the present invention has the same problems.
Muddy water pressure becomes stronger and the skin of the lock semi shield machine
Pressure in the gap between the plate lower fuselage and the tunnel excavation surface
After removing the remaining rock cutting powder,
Eliminate the resistance and keep the lock semi shield machine horizontal
To maintain the excavation propulsion force of the lock semi shield machine.
I can now do. JP-A-61-274084
Promotion described in the official gazette and Japanese Utility Model Publication No. 61-68193
Equipment technology rock semi sea for rock tunnel excavation work
When applied to a rudder machine, muddy water or mud of the propulsion device is excavated.
Since it is used for earth and sand and gravel, its pressure is weak due to its structure .
The rock semi-shielding machine for excavating rock
The muddy water pressure is inevitably small, and the lock semi shield
The machine is the rock semi shield during excavation of the rock tunnel.
As the machine advances, skin lock of the lock semi shield machine
Covering the entire space between the lower fuselage and the tunnel excavation surface
The compressed rock cutting powder could not be removed with muddy water,
As you proceed, it becomes impossible to maintain horizontal
Increase in resistance, leading to lack of propulsive force and eventually stopping
However, according to the present invention, the muddy water
The pressure increases and the skin pre-cut of the lock semi shield machine
It was pressed into the space between the lower fuselage and the tunnel excavation surface.
Remove the remaining rock cutting powder and remove the frictional resistance from the rock cutting powder.
Dissolve, keep the lock semi shield machine horizontal,
It is possible to maintain the excavation propulsion force of the lock semi shield machine.
Came to come.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a lock semi-shielding machine showing an arrangement of a rock cutting powder removing device main body of the present invention composed of a mud sending pipe, a mud sending pipe, and a branch mud sending pipe. Among the rock cutting powder removing devices, the mud transporting device and the mud transporting device, which are separate components,
Not listed.

FIG. 2 is a cross-sectional view of the lock semi-shielding machine, showing the AA cross section of FIG.

FIG. 3 shows a state in which residual rock cutting powder accumulated in a gap between a skin plate lower body and a tunnel excavation surface is generated when a conventional rock semi-shielding machine is used to excavate a shaft. It is sectional drawing of the conventional lock semi shield machine. It should be noted that a machine for transporting muddy water in the mud pipe and a muddy water mixed with rock cutting fragments / rock cutting powder in the mud pipe and a device for driving the machine often form separate bodies, and are not described.

FIG. 4 is a cross-sectional view of a conventional lock semi-shielding machine showing a BB cross section of FIG. 3.

[Explanation of symbols]

1 mud pipe 2 mud pipe 3 branch mud pipe 4 head chamber 5 cutter 6 skin plate lower body 7 mud pipe opening / closing valve 8 branch mud pipe opening / closing valve 9 external mud pipe 10 external mud pipe 11 skin Residual rock cutting powder pressed into the void between the plate lower fuselage and the tunnel excavation surface 12 Tunnel excavation surface

Claims (1)

(57) [Claims] 1. A Okudorokan (1), Okudoro conveying device, Haidorokan (2) consists of rock cutting dust removing device composed of the waste sludge conveying device and the branch Okudoro pipe (3), said transmission Send mud to the mud pipe (1)
A pipe opening / closing valve (7) is provided, and the branch mud pipe
A branch mud pipe opening / closing valve (8) is provided in (3),
The branch mud pipe (3) branches from the mud pipe (1) and penetrates the lower skin plate body (6) of the lock semi-shielding machine to reach the outside of the lock semi-shielding machine (3). ) Arrangement for opening and closing the mud pipe opening and closing valve (7) and
And opening and closing of the branch mud pipe opening / closing valve (8)
That, rock cutting dust removing device lock semi-shield machine.