JPH082232Y2 - Adhesive soil removal device inside the champer of earth pressure shield machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an adhering soil removing device in a chamber of an earth pressure system shield machine.

(Prior Art) During excavation of cohesive soil by an earth pressure system shield machine, the cohesive soil may adhere to the chamber and the cutter slit, or a blocking phenomenon may occur due to arching.

In such a case, the blocking sand was manually removed from the manhole provided in the partition wall of the shield machine.

(Problems to be solved by the invention) As described above, the clogging of sand with human power requires a great deal of labor and time, and also increases the cutter torque and reduces the amount of soil discharged.
Even if the excavated soil adhered to the inside of the chamber or the slit was blocked due to an increase in jack pressure, etc., it was not possible to respond promptly and the excavation was continued.

One is that it takes too much time to permit road work and consultation with the road administrator, and the other is that the sediment that adheres or the soil that blocks the slit has fallen off and the excavation can proceed smoothly. It was because I had experience.

Also, due to the increase in cutter torque, even if the shield jerk does not grow and it becomes impossible to proceed with excavation, the manhole cannot be opened and the inside of the chamber cannot be seen because the confined water and ground improvement treatment have not been performed. I can't take it.

The present invention has been proposed in view of such circumstances,
The purpose of this is to provide a device for removing adhered soil inside the chamber of the earth pressure system shield machine that removes the adhered soil inside the chamber easily and quickly so that the excavation of the shield machine can be performed without hindrance. .

(Means for Solving the Problems) In order to achieve the above-mentioned object, a device for removing adhered soil in a chamber of an earth pressure system shield machine according to the present invention includes a manhole cover provided in a chamber partition wall in an earth pressure system shield machine. The high-pressure water injection pipe connected to the high-pressure pump is inserted into the universal joint connected to the inside of the shield machine, and the tip injection nozzle of the injection pipe is exposed inside the chamber, and the expansion / contraction device for the high-pressure water injection pipe is inside the machine. Are arranged.

Further, the invention of claim 2 is such that a tip injection nozzle of a high-pressure water injection pipe is opened in the fixed sled portion of the chamber end portion toward the periphery of the chamber end portion.

(Operation) Since the present invention is configured as described above, when the excavated soil is expected to adhere to the chamber and the cutter slit is blocked, the soil in the chamber is carried out as much as possible, and the high-pressure water jet is used. While rotating the pipe through a universal joint, it is expanded and contracted by the expansion device, the high pressure water is injected by bringing the tip nozzle of the high-pressure water injection pipe close to the slit, and the cutter head is rotated, or the band-shaped adhered soil, or The arching earth and sand is destroyed and peeled off to enable smooth excavation.

According to a second aspect of the present invention, there is provided a tip injection nozzle of the high-pressure water injection pipe, which is disposed on a fixed sled portion of the chamber end portion,
By injecting high pressure water toward the edge of the chamber, the adhesion of sediment to the chamber is delayed,
It promotes the separation of the soil.

(Embodiment) The present invention will be described below with reference to the illustrated embodiment.

FIG. 9 shows an earth pressure system shield machine (A), (B) is a rock mass, (C) is Tatsuta Face Ace, (D) is a shield jerk, and a slit (with a rotation of a cutter face A (C)). Excavated soil taken from E) into the chamber (F)
It is configured to be carried out to the outside of the mine by a screw conveyor (H) arranged so as to be connected to the partition wall (G).
In the figure, (I) is a drive device for the cutter face (C).

A ball valve (2) and a universal joint (3) are connected and attached to a manhole cover (1) provided on the partition wall (G), and further a presser foot (4) attached to the universal joint (3).
The high-pressure water jet pipe (6) having the jet nozzle (5) attached to the tip end is inserted through the pipe, and the jet nozzle (5) faces the chamber (F).

In the figure, (7) is a cock, (3a) is a socket of the universal joint (3), (3b) is a ball portion, (3c) is a packing, and (3d) is a bolt nut.

FIG. 2 shows an expansion / contraction device for the high-pressure water injection pipe (6),
A hydraulic jack (9) is interposed between the presser foot (4) and the chuck (8) held by the high-pressure water jet pipe (6).

Further, in the end fixed sled portion (10) of the chamber (F), a tip injection nozzle (5 ') of a high pressure water injection pipe (6') connected to a high pressure pump is directed around the end of the chamber (F). It is arranged to do.

 In the figure, (11) is a scraping plate.

Since the illustrated embodiment is configured as described above,
When sediment adheres to the chamber (F) and clogging of the slit (E) is expected, the sediment in the chamber (F) is carried out as much as possible, and the high-pressure water injection pipe (6) is connected to the universal joint. While rotating via, the hydraulic jack (9) expands and contracts to bring the injection nozzle (5) at the tip of the high-pressure water injection pipe (6) close to the slit (E) to inject high-pressure water, The band (S) (E) is released by destroying the band-shaped adhering soil and arching earth and sand, thus enabling smooth progress.

In addition, the high pressure water jet pipe (6 ') from the fixed sled portion (10)
By injecting high-pressure water through the, the adhesion of soil and sand to the inside of the chamber (F) is delayed or the separation is promoted.

(Effects of the Invention) According to the present invention, as described above, the universal joint connected to the inside of the shield machine of the manhole cover provided on the chamber bulkhead in the earth pressure system shield machine is connected to the high pressure water injection pipe continued to the high pressure pump. , The tip of the injection pipe is desired in the chamber, the injection pipe is rotatable, and the high-pressure injection pipe expansion and contraction device installed inside the shield machine makes it possible to expand and contract. It is possible to inject the slag close to the slit of the cut turf ace so that the soil that blocks the slit can be easily and quickly removed by remote control, and the shield machine can be smoothly excavated.

According to a second aspect of the present invention, the tip of the high-pressure water jet pipe is opened in the fixed sled portion at the end portion of the chamber toward the periphery of the end portion of the chamber, thereby delaying the adhesion of the earth and sand to the inside of the chamber and peeling it off. Is to promote.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of a device for removing adhering soil in a chamber of an earth pressure system shield machine according to the present invention, an enlarged view of a portion X in FIG. 9, and FIG. FIG. 3 is a perspective view showing a back surface portion of the partition wall portion, FIG. 4 is a vertical sectional side view of the free joint portion, FIG. 5 is a partial perspective view of a chamber end portion, and FIG. Enlarged view, FIG. 6 is a partially enlarged view of FIG. 5, FIG. 7 is a partially enlarged view of FIG. 6, FIG. 8 is a view taken along the line ZZ of FIG. 7, and FIG. It is a vertical side view of the earth pressure system shield machine provided. (F) ... Chamber, (G) ... Partition, (1) ... Manhole cover, (2) ... Ball valve, (3) ... Universal joint,
(4) ... presser foot, (5) (5 ') ... injection nozzle,
(6) (6 ') ... High-pressure water jet pipe, (9) ... Hydraulic jack, (10) ... Fixed sled piece.

Claims (2)

[Scope of utility model registration request] 1. A high-pressure water injection pipe connected to a high-pressure pump is inserted into a universal joint connected to the inside of the shield machine of a manhole cover provided on a chamber partition wall in the earth pressure system shield machine, and the tip injection of the same is performed. A device for removing adhering soil in a chamber of an earth pressure system shield machine, characterized in that a nozzle faces the inside of the chamber, and an expansion / contraction device for the high-pressure water injection pipe is arranged inside the chamber. 2. A device for removing adhering soil in a chamber of a soil pressure system shield machine, wherein a tip injection nozzle of a high-pressure water injection pipe is opened in the fixed sled portion of the chamber end portion toward the periphery of the chamber end portion.