JPH0791182A - Fluid transporting method of excavated earth and sand - Google Patents

Abstract

PURPOSE:To fluidize excavated earth and sand, and carry them with high efficiency. CONSTITUTION:Muck-contained excavated earth and sand are charged into a water tank 4 and they are consecutively carried to a high fountain spray nozzle chamber 6d formed on the rear end of a casing 6a with a screw blade of a screw conveyor 6 in the bottom of the tank 4. The earth and sand in the nozzle chamber 6d are fluidized with a high speed fluid sprayed into the high fountain spray nozzle chamber 6 from a jet nozzle 6c on the rear end of a screw shaft 6b and then transported by way of a muddy discharge pipe, which makes it possible to transport the excavated earth and sand efficiently without using a truck.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transporting excavated sediment by fluid transporting sediment excavated by a rock tunnel excavator, an earth pressure shield excavator or the like.

[0002]

2. Description of the Related Art Conventionally, as a method for conveying earth and sand excavated by a tunnel excavator or the like, for example, JP-A-59-31400, JP-A-61-246498, and JP-A-2-1-2.
As disclosed in Japanese Patent Publication No. 36196, etc., a method is known in which muddy water or the like is injected into excavated soil to make it fluid, and the fluid is transported by using a drainage pump or the like.

However, since earth and sand excavated by a rock tunnel excavator or an earth pressure type shield excavator is liable to be clogged by rocks in the transportation pipe in fluid transportation, it is conventionally carried out by using a truck such as a truck. Has been adopted.

[0004]

However, transportation by a truck such as a truck is not efficient, and since the inside of the tunnel is contaminated by the earth and sand falling during the transportation, there is a problem that it is difficult to remove it. . In addition, it requires a large number of manpower to drive the carrier and discharge the earth and sand, and the carrier travels in a narrow tunnel, which poses a problem that other workers are in danger. The present invention has been made to improve such conventional problems, and to provide a fluid transportation method for excavated sediment that enables fluid transportation of sediment excavated by a rock tunnel excavator or an earth pressure shield machine. It is intended.

[0005]

In order to achieve the above object, the present invention carries excavated earth and sand containing scraps from the face of a tunnel to the rear of the machine by a belt conveyor and puts them into a water tank tank filled with water. Shut off from the air, quantify the excavated earth and sand containing the slip by the screw blades of the screw conveyor provided at the bottom of the aquarium tank, and successively convey to the high fountain jet nozzle chamber formed at the rear end of the casing,
In addition, the high-speed fluid ejected from the jet nozzle at the rear end of the screw shaft into the high fountain jet nozzle chamber pushes the sediment in the high fountain jet nozzle chamber into the discharge pipe together with the fluid, and transports it with the sludge pump provided at the rear. It was done.

[0006]

With the above structure, excavated soil can be efficiently transported without using a truck such as a truck.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of a rock tunnel excavator for carrying out the method of the present invention, FIG. 2 is a sectional view of an aquarium tank for liquefying excavated soil, and FIG. 3 is a piping diagram showing a transportation route.

In FIG. 1, reference numeral 1 denotes an excavator main body, which has a rotatable cutter head 2 at a front portion thereof. The earth and sand excavated by the cutter head 2 is taken into a chamber 1a and then a belt. The soil discharging device 3 such as a conveyor conveys the water into a water tank tank 4 filled with water, which is installed in the rear of the excavator main body 1 and shuts off the air layer.
As shown in FIG. 2, the aquarium tank 4 has wheels 5 at its lower portion, which allow the wheels 5 to travel following the excavation of the excavator body 1 and also have a hopper-shaped bottom portion. Inside, a screw conveyor 6 is provided so as to be parallel to the excavation direction.

The screw conveyor 6 has a hollow casing 6a whose middle portion is opened in the water tank tank 4, and a hollow hollow casing which is provided in the casing 6a and is rotated by a drive motor 7 provided above the front end of the casing 6a. It consists of a screw shaft 6b. From the front end side of the screw shaft 6b, a fluid such as water flows in from the front end side of the water supply pipe 8 installed at the upper part of the water tank tank 4, and the rear end portion of the screw shaft 6b is The jet nozzle 6c has a tapered shape.
A high-speed fluid is jetted from c into the high-fountain jet nozzle chamber 6d formed at the rear end of the casing 6a.

Further, the discharge port 6 of the high fountain jet nozzle chamber 6d is provided on the outer peripheral portion of the high fountain jet nozzle chamber 6d of the casing 6a.
A peripheral nozzle 9 for ejecting high-speed fluid toward the e side is provided, and the discharge port 6e is connected to a crusher 12 installed at the rear of the water tank tank 4 by a pipe line 10 from the discharge port 6e. The discharged earth and sand is sent to the crusher 12 through the pipe line 10.

On the other hand, behind the crusher 12, sludge pumps 13 _-1 , 13 _-2 and a water feed pump are installed, and the earth and sand crushed by the crusher 12 is installed on the ground by the sludge pump 13. It is sent to the muddy water treatment device 17 for treatment.

The fluid from the first water pump 15 and the circulating water pump 14 _-1 is supplied into the screw shaft 6b through the water pipe 8, and the fluid from the second water pump 14 _-2 is supplied to the pipeline 1.
It is adapted to be supplied to the peripheral nozzle 9 via 8.

Next, the fluid transportation method of excavated sediment will be explained. The sediment containing excavated excavated by the cutter head 2 in the front part of the excavator main body 1 is taken into the chamber 1a, and then the excavation device 3 is used for the aquarium tank. 4 is conveyed to the inside of the tank 4 and is cut off from the air layer. The earth and sand put into the aquarium tank 4 is quantified by the blades 6b of the screw conveyor 6 provided at the bottom of the excavated earth and sand and is conveyed backward in the casing 6a, and in the high fountain jet nozzle chamber 6d, The high speed fluid ejected from the jet nozzle 6c at the rear end of the screw shaft 6b is fluidized and sent to the crusher 12.

Further, as shown in FIG. 5, even if the sand 20 charged in the water tank 4 contains a gap 20 larger than the height h of the blades of the screw shaft 6b, the gap 20 is opened in the casing 6a. Since it is not caught by the end and sent, the size of the slid 20 for fluid transportation can be limited at this stage, and at this time, if the driving torque of the screw shaft 6b increases and stalls, the screw shaft 6b is If the stall is canceled by reversing the step and the cancellation cannot be canceled even after repeating the canceling operation, cancel it artificially.

On the other hand, the earth and sand sent to the crusher 12 by the jet jet is crushed by the crusher 12 and then sucked into the mud pump 13 through the small diameter mud pipe 21 and further on the ground mud treatment device. It is sent to 17 for processing.

Further, during the fluid transportation, the transportation may be interrupted by the clogging of earth and sand in the high fountain jet nozzle chamber 6d at the rear end of the casing 6a as shown in FIG. In order to prevent this, the fluid is supplied from the second pump 14 _-2 to the peripheral nozzles 9 and the high-speed fluid is supplied to the soil clogged by the peripheral nozzles 9 along the inner peripheral surface of the high fountain jet nozzle chamber 6d as shown in FIG. As shown in the drawing, it prevents the earth and sand from sticking and growing on the inner surface of the high fountain jet nozzle chamber 6d. As a result, it is possible to prevent the soil from blocking the high fountain jet nozzle chamber 6d.

Although the above embodiment is for a rock tunnel excavator, it is needless to say that it can be applied to an earth pressure type shield excavator and general earth and sand transportation.

[0018]

As described above in detail, the present invention fluidizes earth and sand excavated by a rock tunnel excavator, an earth pressure type shield excavator, etc. and then discharges it by a mud pipe. Therefore, the transportation efficiency is significantly improved as compared with the case where the vehicle is carried out by a conventional truck such as a truck, and the inside of the tunnel is contaminated by the soil spilled from the truck or it is not necessary to remove it. In addition, since the carrier does not travel in a narrow tunnel, the safety of the worker can be achieved, and since manpower is not required to carry the earth and sand, the earth and sand transportation can be automated and labor saving can be achieved.

[Brief description of drawings]

FIG. 1 is a sectional view of a rock tunnel excavator that has been subjected to the method of the present invention.

FIG. 2 is a sectional view of a water tank tank for liquefying excavated soil.

FIG. 3 is a piping diagram showing a transportation route of earth and sand and a fluid.

FIG. 4 is an enlarged view of a circle A in FIG.

FIG. 5 is an explanatory view showing the operation of the method of the present invention.

FIG. 6 is an explanatory view showing the operation of the method of the present invention.

FIG. 7 is an explanatory view showing the operation of the method of the present invention.

[Explanation of symbols]

 4 Water Tank Tank 6 Screw Conveyor 6a Casing 6b Screw Shaft 6c Jet Nozzle 6d High Speed Fountain Injection Nozzle Chamber 9 Peripheral Nozzle 13 Sludge Pump

Claims (2)

[Claims] 1. Excavated sediment containing sludge is carried out from the face of a tunnel to the rear of the machine by a belt conveyor and is introduced into a water tank tank 4 filled with water to shut off from the air layer, and to the bottom of the tank tank 4. The blade of the screw conveyor 6 provided quantifies the excavated soil including the slip, and the casing 6
The jet nozzle 6 at the rear end of the screw shaft 6b is sequentially conveyed to the high-speed fountain jet nozzle chamber 6d formed at the rear end of the screw shaft 6b.
Excavation characterized in that the sediment in the taper chamber 6d is pushed into the sludge pipe 10 together with the fluid by the high-speed fluid ejected from c to the high-speed fountain jet nozzle chamber 6d and is transported by the sludge pump 13 provided at the rear. How to transport sediment. 2. The fluid transport method according to claim 1, wherein the peripheral nozzle 9 provided around the taper chamber 6d ejects a high-speed fluid along the inner surface of the taper chamber 6d to prevent clogging of the earth and sand.