JP2936241B2 - Mud treatment method for shield machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating mud discharged from a shield machine for excavating a tunnel by a shield method .

[0002]

2. Description of the Related Art Generally, when a tunnel is excavated by a shield excavator, pressurized water is sent to the tip of the shield excavator to pressurize a face portion, and excavation is performed while preventing collapse of the ground together with the propulsive force of a shield jack. ing.
Then, since the shaved soil becomes mud by pressurized water, a pipeline is installed outside the tunnel from behind the shield machine, and the mud generated through this pipeline is sent out of the tunnel and temporarily stored in an external mud tank. ing. And when a predetermined amount of mud is stored in the mud tank, a solidifying agent is put into the mud tank and the mud is stirred with a backhoe or the like,
After being solidified so that it can be disposed of, it is removed from the mud tank and disposed of.

[0003]

However, when the mud discharged from the shield excavator is sent out of the tunnel to be solidified, it is necessary to add pipes of the pipeline according to the progress of the shield excavator. Also, the longer the pipeline, the greater the load on the pump to pump. Furthermore, when the mud is collected in an external mud tank and then solidified, it is difficult to stir the mud uniformly, which requires a long working time and a heavy burden on the operator.

[0004] In view of the above, the present invention provides a method of treating a mud of a shield machine that can be continuously solidified when mud is discharged from the shield machine and can be carried out of a tunnel in a disposable state. The purpose is to do.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention is to run a gate-type gantry that crosses a trolley running rail laid in a tunnel behind a shield machine for digging a tunnel. Arranged freely, a continuous mixer for continuously kneading the mud discharged from the shield excavator is arranged at the top of the gantry, and powder for solidifying the mud is supplied to the continuous mixer on the side of the gantry. with disposing the supplying powder feeder, the space of the lower frame of the continuous mixer configured to secure the traveling path of trolley, the continuous Mi
Make the truck stand in the space of the frame below the
Load the mud solidified by the mixer and outside the tunnel
And the minecart passes through the space of the gantry.
Into the vicinity of the shield machine in front of
Foreign materials in materials and mud are carried in and out .

[0006]

According to the present invention, when mud is discharged from the shield excavator during tunnel construction, the mud is sent to a continuous mixer disposed behind the shield excavator and simultaneously solidified from the powder supply device. A predetermined amount of powder for use is fed into the mixer and mixed to adjust the hardness to a value that can be discarded. Then, a trolley for carrying out is put on standby in a trolley passage below the continuous mixer, and the solidified mud discharged from the continuous mixer is sequentially loaded and carried out of the tunnel. As a result, the solidification treatment can be quickly and discarded at the point where mud is generated in the tunnel. In addition, even if there is a mud treatment device of the shield machine in the tunnel, the space of the gantry below the continuous mixer is secured as a passage for the minecart, so the minecart suspends operation of the mud treatment device. Even at times, it is possible to freely move back and forth in the traveling passage.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a tunnel under construction, in which a shield excavator 2 is introduced into the face at the tip of the tunnel 1 to excavate the tunnel. A rail 4 for running the truck 3 is laid.

A rotating cutter (not shown) is attached to a tip of the shield machine 2 facing the face, and the cutter is pressed against the face, and pressurized water is injected between the face and the cutter. Then, the face is cut off while preventing the earth and sand from falling down. A screw conveyor 5 for discharging shaved earth and sand is provided on the back of the cutter unit.

A mud treatment device 6 is provided behind the shield machine 2. Rails 7 for running the mud treatment device are laid on both sides of the trolley rail 4 so as to straddle the trolley rail 4. A gantry 8 of a gate-type mud treatment device 6 is mounted via wheels 9 so as to be freely movable. A continuous mixer 10 is disposed on the upper part of the gantry 8.
Two kneading shafts having a large number of kneading blades are arranged in parallel in 0, and the materials are continuously mixed while the two kneading shafts are rotated by motors 11 in opposite directions. The mud discharged from the screw conveyor 5 of the shield machine 2 is supplied from the material supply unit 12 of the continuous mixer 10 via a mud pump or the like, and moves along the kneading axis while being kneaded in the mixer. Is discharged from the discharge section 13.

A space in which the truck 3 can travel is secured below the continuous mixer 10.
However, even in the tunnel 1, the truck 3 can freely move back and forth, and can carry out earth and sand, carry in materials, and the like.

A powder supply device 14 for supplying a mud solidifying agent, which is a powder, to the mixer 10 is disposed on the side of the gantry 8. The powder supply device 14 comprises a powder hopper 15 for storing a predetermined amount of powder, and a powder pump 16 for continuously and quantitatively feeding the powder. The pipe 17 is connected, and the tip of the supply pipe 17 faces the material supply unit 12 in the mixer 10. Note that the powder supply device 14 may be provided not on the side of the gantry 8 but on the upper portion as long as the installation space is secured.

Numeral 18 denotes a mud solidifying agent storage tank which stores a large amount of mud solidifying agent, which is disposed outside the tunnel 1 and which is used when the mud solidifying agent stored in the powder hopper 15 becomes small. A powder truck 19 is appropriately carried into the tunnel 1 and supplied to the powder hopper 15.

When a tunnel is excavated by the shield machine 2, earth and sand generated by the excavation are turned into mud by pressurized water and discharged from the screw conveyor 5. This mud is supplied to the material supply unit 11 of the continuous mixer 10.
At the same time, the powder pump 16 of the powder supply device 14 is driven to supply the mud solidifying agent in an amount corresponding to the supply amount of the mud, and knead with the mud. If the mixture is kneaded for a predetermined time by the mixer 10, the mud is solidified and can be disposed of, and is discharged from the material discharge unit 13 of the mixer 10, sequentially loaded on the trolley 3 waiting below the material discharge unit 13, and It is carried out and disposed of. When the storage amount of the powder hopper 15 becomes small, the mud solidifying agent is appropriately carried into the tunnel 1 by the powder truck 19 and supplied to the powder hopper 15.

Further, since the mud processing device 6 is configured so that the minecart 3 can freely move underneath, the loading of the material and the like by the minecart 3 can be performed even when the operation of the mud processing device is suspended. Can be carried out without any trouble.

[0016]

As described above, according to the present invention, the mud treatment device 6 is disposed movably behind the shield excavator 2 for excavating a tunnel, and mud discharged from the shield excavator 2 is generated. Can be quickly disposed of at the point where it can be disposed of, so that there is no need to install a pipeline for carrying mud inside the tunnel as in the past, and there is no need for kneading work to solidify the mud outside the tunnel. Thus, the efficiency of the mud disposal work can be improved. Furthermore, since the mud processing unit 6 is configured so that the truck 3 to secure a space capable of freely traversing the lower, shea
To send a minecart near the machine 2
Carry in and out of materials and carry foreign matter separated from mud.
Work efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view including an apparatus showing an embodiment of the present invention.

FIG. 2 is an enlarged front view of the same device.

FIG. 3 is a side view of the same.

FIG. 4 is a plan view of the same.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Tunnel 2 ... Shield excavator 3 ... Dolly 4 and 7 ... Rail 6 ... Mud treatment apparatus 8 ... Stand 10 ... Continuous mixer 14 ... Powder supply apparatus

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-13199 (JP, A) JP-A-2-54092 (JP, A) JP-A-3-66898 (JP, A) 158599 (JP, A) JP 2-58439 (JP, B2) (58) Field surveyed (Int. Cl. ⁶ , DB name) E21D 9/12

Claims (1)

(57) [Claims] 1. A gate-type mount that straddles a trolley running rail laid in a tunnel is movably disposed behind a shield machine for excavating a tunnel, and the shield machine is disposed above the mount. A continuous mixer for continuously kneading the mud to be mixed is provided, and a powder supply device for supplying powder for solidifying the mud to the continuous mixer is provided on a side of the gantry, and the continuous mixer is provided. The space of the gantry underneath is secured as a trolley traveling path, and the continuous
Make the truck stand in the space of the frame below the
Load the mud solidified by the mixer and outside the tunnel
And the minecart passes through the space of the gantry.
Into the vicinity of the shield machine in front of
A method for treating mud in a shield machine, wherein foreign materials in materials and mud are carried in and out .