JP2777542B2 - Excavation sediment unloading system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an excavated sediment transport system, and more particularly to an excavated sediment transport system in a mud pressure shield method.

[0002]

2. Description of the Related Art Generally, when a tunnel is constructed, a muddy water shield method is often employed because of its many advantages such as stability of a face and improvement of a working environment.

However, in the muddy water shield method,
Filling the cutter chamber between the partition wall and the face with pressurized muddy water, stabilizing the face, taking in the excavated earth and sand into the muddy water, and transporting it as muddy water to the ground muddy water treatment equipment. The sediment is subjected to a classification process, and the mud is adjusted to a predetermined property, and is again circulated as muddy water. This muddy water treatment facility requires a vast work base.

In particular, in urban areas, it has become difficult to secure a vast work base for ground equipment, so in urban areas, etc., instead of the muddy shield method, a mud pressure shield is used. Construction methods may be adopted.

[0005] In this mud pressure shield construction method, construction is performed while injecting an additive such as mud which promotes plastic fluidization of excavated earth and sand. Compared to the shield method, there is no need for a vast work base for ground equipment.

[0006]

The above-mentioned mud pressure shield method does not require a very large work base for ground equipment as compared with the muddy water shield method. generally when unloading, not a has to be carried out using a retro, when performing discharge of drilling soil with such shear Toro, or provided with a shear bottle into vertical shaft, to accommodate the drilling soil Space for reversing the bucket was required, and the area of the shaft had to be increased.

[0007] When the area of the shaft becomes large, the ground equipment becomes large, and it is difficult to dig a tunnel when sufficient land cannot be secured for the ground equipment such as in an urban area. There was a problem that would be in a state.

Further, in the mud pressure shield method, especially in an urban area, a dump truck or the like cannot be operated at night due to a problem of noise. Therefore, at least a space for storing excavated earth and sand for night work is required. When this storage space is provided in the ground equipment, the ground equipment becomes large, and when it is not possible to secure a wide space for the ground equipment, a state where the tunnel cannot be excavated also occurs. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to reduce the size of the ground equipment and to secure a large space for the ground equipment such as an urban area. In such a case, an object of the present invention is to provide an excavated sediment transport system that enables construction of a tunnel.

[0010]

In order to achieve the above object, a first aspect of the present invention is to fill a cutter chamber between a partition wall and a face with earth and sand cut by a cutter, and to deposit earth and sand corresponding to the amount of excavation. In the excavated earth and sand transport system of the mud pressure shield method that excavates and excavates, it is installed in the shaft for starting the shield machine and stores the excavated earth and sand
And excavating sand hopper that is disposed within the tunnel, the mosquito
The excavated sediment in the pit chamber is transported to the excavated sediment hopper.
A first pumping tube feeding, is disposed within said vertical shaft, said drilling
The second to carry the excavated earth from the excavated earth and sand hopper to the ground
Includes a pumping tube, the tube diameter of the first pumping tube, the
Rear bogie rear connected to the shield machine from the shield machine
In the section A up to, the excavation from the rear of the rear bogie
Smaller than the pipe diameter in section B to the earth and sand hopper
It is characterized by being made .

According to a second aspect of the present invention, in the first aspect, the excavation
The excavated sand was disposed on the shield machine in the section A.
Transported by a snake pump,
Piston pump installed at the rear of the truck and the tunnel
Transported by a relay pump arranged at an appropriate position in the
It is characterized in that that.

A third aspect of the present invention is directed to claim 1 or 2.
The excavated earth and sand hopper can be used at least overnight
It is characterized by having a capacity to store a corresponding amount of excavated sediment .

According to a fourth aspect of the present invention, there is provided any one of the first to third aspects.
In the above, the shaft is set at the height of the excavated sediment hopper.
Drill deep and store excavated sediment hopper at bottom of shaft
It is characterized in that that.

According to a fifth aspect of the present invention, there is provided any one of the first to fourth aspects.
The excavated sediment hopper,
It is characterized by a sensor that measures the bell .

[0015]

According to the first aspect of the present invention, in the tunnel,
Excavation in the cutter chamber by the first pumping pipe installed in
The sediment is transported and temporarily stored in the excavated sediment hopper arranged in the shaft, and the excavated sediment hopper is disposed in the shaft.
It is not necessary to provide a space for storing excavated earth and sand in the ground equipment
The occupied area required for the shaft and ground facilities can be reduced.

Further, by excavating the excavated earth and sand through the first and second pumping pipes, the shaft area can be reduced as compared with the conventional case where a shear toro is used. It is possible to keep it small. Further, the workable area in the mine can be widened, and the work environment in the mine can be improved. In particular, the first pressure
The transmission pipe is the pipe in the section A from the shield machine to the rear of the rear bogie.
Diameter of section B from the rear of the rear bogie to the excavated soil hopper
Work in section A because it is smaller than the pipe diameter of
Space can be prevented from being impaired.

According to the second invention, a snake pump is provided.
Is shielded because it is smaller than a piston pump.
Piping excavated soil without damaging the work space inside the machine
Can be transported to the pump
In section B, where there are no pistons, a relatively large piston pump or relay port
Sufficient conveyance can be performed using the pump.

According to the third invention, an excavated earth and sand hopper is provided.
The capacity to store at least overnight excavated sediment
This makes it possible to move the dump truck at night
Even in urban areas where there is no
Minutes of excavated sediment can be temporarily stored,
Tunnel excavation can be performed continuously at night .

According to the fourth aspect of the present invention, the shaft is excavated with earth and sand.
Drill deeper to the height of the
The pit area can be increased by storing
And there is no problem in transporting materials into the tunnel.
It becomes possible to store the excavated earth and sand hopper .

According to a fifth aspect, an excavated earth and sand hopper is provided.
Measuring the storage level of excavated sediment in the building with a sensor
To control the storage level to a constant
The size can be reduced by reducing the amount .

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 to 3 are views showing an excavated earth and sand carrying system according to an embodiment of the present invention.

The system for carrying out excavated earth and sand in this embodiment is used in a mud pressure shield method. In this mud pressure shield method, a ground facility 12 is disposed on a shaft 10 for starting a shield. Shield machine 14
And the tunnel 20 is constructed while assembling the segment 18 at the rear of the shield machine 14 while excavating the ground with the cutter 16 attached to the tip of the shield machine 14. The ground facility 12 includes various facilities such as a facility 2 for injecting mud and a backfill, a central control room 3, a turbid water treatment device 4, a substation facility 5, and a mud solidification device 52. It has become.

At the time of excavation by the shield machine 14, earth and sand cut by the cutter 16 are filled in a cutter chamber 26 between the partition wall 22 and the face 24, and the cutter chamber 2
The excavation is carried out while pouring an additive such as a mud material that promotes the plastic fluidization of excavated soil into the inside 6 and discharging soil corresponding to the excavated amount from the cutter chamber 26.

The excavated earth and sand in the cutter chamber 26 is removed from the shield machine 14 in the tunnel 20 by the shield machine 14.
Section A to the rear of the rear bogie 32 connected to 14 and the rear
2 provided in the section B from the rear of the bogie 32 to the shaft 10
First pumping tube 3 composed of different kinds of pumping tubes 36, 38
5 to the shaft 10. That is, the cutter
The excavated earth and sand in the chamber 26 is taken into the shield machine 14 by a screw conveyor 28 arranged in the shield machine 14, and the rear bogie connected to the shield machine 14 therefrom by a snake pump 30 arranged in the shield machine 14. It is configured to be conveyed via a pressure feed pipe 36 between piston pumps 34 at the rear of 32. Since the snake pump 30 is smaller than the piston pump 34,
The excavated earth and sand can be transported to the piston pump 34 without impairing the working space in the shield machine 14. Further, the snake pump 30 has a capability of sufficiently pumping excavated earth and sand to the rear part of the rear bogie 32.

Further, the pressure feed pipe 36 is connected to the snake pump 3
By using a section with a slightly smaller diameter (for example, 6 inches) in the section from 0 to the piston pump 34, the working space in the shield machine 14 can be prevented from being impaired.

From the piston pump 34 at the rear of the rear bogie 32, excavated earth and sand is carried out to the shaft 10 via the pressure feed pipe 38, using a relay pump as appropriate. The tunnel 20 between the rear bogie 32 and the shaft 10 has a relatively large piston pump 34, a relay pump, and a large diameter (for example, 8 inches) because there is no rear bogie 28 or the like.
Can be sufficiently installed.

Further, a mixing device 35 is provided on the wellhead side of the piston pump 34, and an additive for facilitating the pumping of excavated earth and sand is mixed therein. In this case, the properties of the earth and sand in the pressure feed pipe 36 may be measured by various sensors (not shown), and the type, combination and amount of the additive may be set according to the measurement result.

As described above, from the shield machine 14 to the shaft 10
By carrying out the excavated earth and sand up to the pumping pipes 36 and 38 without using a shearing torro, it is not necessary to provide a shearing bin or a bucket reversal space in the shaft 10, and therefore, the shaft 10 is minimized. The size of the ground equipment 12 can be reduced accordingly.

In the shaft 10, an excavated sediment hopper 40 is disposed at the bottom, and the excavated sediment carried out by the pressure pipe 38 is stored in the excavated sediment hopper 40. As described above, by temporarily storing the excavated sediment in the excavated sediment hopper 40 disposed in the shaft, there is no need to provide a space for excavated sediment storage in the ground equipment 12, and the ground equipment 12 is reduced accordingly. This makes it possible to launch a shield from a narrow construction site. In this case, a level measuring device such as an ultrasonic sensor is provided in the excavated sediment hopper 40, and according to the measurement result, the tip position of the pumping pipe 38 is controlled so that the excavated sediment is substantially at the same level. Thus, the capacity of the excavated earth hopper 40 can be reduced.

The excavated soil hopper 40 has a capacity capable of storing at least one night of excavated earth and sand, for example, 7 g / night.
When performing excavation for up to 8 rings, it has a capacity to store the amount of excavated sediment corresponding to the excavation of 7 to 8 rings, and even in an urban area where the operation of a dump truck or the like is restricted such as at night, Excavated earth and sand for night excavation can be sufficiently stored in the excavated earth and sand hopper 40. Therefore, excavation by the shield machine 14 can be continued even during a time period in which the operation of the dump truck or the like is impossible, and excavation can be performed continuously day and night.

Further, the excavated sediment hopper 40 excavates the shaft 10 at the height of the excavated sediment hopper 40 and is disposed at the bottom of the shaft. It is configured to be located at least below the position of the transport rail 42 disposed in the tunnel 10. Therefore, the excavated earth and sand hopper 40 can be stored in the shaft 10 without increasing the area of the shaft 10, and the conveyance of the equipment such as the segments by the carriage 44 is not hindered.

From the excavated sediment hopper 40 in the shaft 10, excavated earth and sand taken out from the screw feeder 46 is disposed in the shaft 10 by a piston pump 48.
It is carried out into the ground equipment 12 via the second pressure feed pipe 50.

A mud solidifying device 52 is provided in the ground equipment 12, and the second pumping pipe 50 is provided by the mud solidifying device 52 .
The excavated earth and sand carried out is solidified and the dump truck 54
And is carried out from the ground equipment 12. In this case, the properties (specific gravity, water content, particle size composition, mineral composition, etc.) of the excavated earth and sand in the second pumping pipe 50 are measured by appropriate means, and the amount of the solidified material is automatically set according to the result. And supply it. Therefore, since the excavated earth and sand can be carried out from the ground facility 12 in a solidified state, the carry-out from the ground facility 12 can be easily performed. Further, it can be effectively used as a material for landfilling, backfilling, embankment construction, and the like.

In this embodiment, the ground equipment 12
In order to eliminate the stock space for the segments and the space for work, and to keep the ground equipment 12 as small as possible, a segment stock device 56 for accommodating a plurality of segments in the shaft 10 is provided, and a stacker device 58 that can move up and down. The loading and unloading of segments into and from the segment stock device 56 is carried out, and the segments are transported from the segment stock device 56 into the tunnel 20 by the transport vehicle 44, and the segment temporary storage vehicle 6
You can stock it at 0.

The present invention is not limited to the above embodiment, and various modified embodiments are possible within the scope of the present invention. For example, in the above-described embodiment, the case where the segments are stored in the segment stock device in the shaft has been described. However, the present invention is not limited to this example.
It is also possible to stock the segments within.

[0037]

As described above, according to the first aspect of the present invention, the first pumping pipe provided in the tunnel is provided.
Transports the excavated earth and sand in the cutter chamber and distributes it in the shaft.
It is necessary to provide a space for storing excavated sediment on the ground equipment by temporarily storing it in the excavated sediment hopper that has been set up and carrying it from the excavated sediment hopper to the ground using the second pumping pipe installed in the shaft. In addition, there is an effect that it is possible to reduce the size of the ground equipment and construct a tunnel in an urban area where a large work space cannot be taken.

Further, by excavating the excavated earth and sand through the first and second pumping pipes, the area of the shaft can be reduced as compared with the conventional case where a shear toro is used. It is possible to keep it small. Further, the workable area in the mine can be widened, and the work environment in the mine can be improved . In particular, the first pressure
The transmission pipe is the pipe in the section A from the shield machine to the rear of the rear bogie.
Diameter of section B from the rear of the rear bogie to the excavated soil hopper
Work in section A because it is smaller than the pipe diameter of
There is an effect that the space can be prevented from being damaged .

According to the second invention, the snake pump
Is shielded because it is smaller than a piston pump.
Piping excavated soil without damaging the work space inside the machine
Can be transported to the pump
In section B, where there are no pistons, a relatively large piston pump or relay port
There is an effect that sufficient conveyance can be performed using the pump .

According to the third invention, an excavated earth and sand hopper is provided.
The capacity to store at least overnight excavated sediment
This makes it possible to move the dump truck at night
Even in urban areas where there is no
Minutes of excavated sediment can be temporarily stored,
There is an effect that it becomes possible to excavate a tunnel continuously at night .

According to the fourth aspect of the present invention, the shaft is excavated with earth and sand.
Drill deeper to the height of the
The pit area can be increased by storing
And there is no problem in transporting materials into the tunnel.
There is an effect that the excavated earth and sand hopper can be stored .

According to the fifth invention, an excavated earth and sand hopper is provided.
Measuring the storage level of excavated sediment in the building with a sensor
To control the storage level to a constant
There is an effect that the size can be reduced by reducing the amount .

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state of ground equipment and a shaft of an excavated earth and sand discharging system according to an embodiment of the present invention.

FIG. 2 is a sectional view of a tunnel following the shaft of FIG.

FIG. 3 is a plan view of the ground equipment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Vertical shaft 12 Ground equipment 14 Shield machine 16 Cutter 20 Tunnel 22 Partition wall 24 Face 26 Cutter chamber 30 Snake pump 32 Back bogie 34 Piston pump 36,38,50 Pumping pipe 40 Drilling sand hopper 48 Piston pump 52 Mud solidifying device

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yuichi Shibasaki 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Hirohiko Haruyama 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction (72) Inventor Kunihiko Iizumi 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Sadao Noguchi 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. 72) Inventor Yoshio Iwai 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (56) References JP-A-60-164598 (JP, A) JP-A-60-199198 (JP, A) ( 58) Field surveyed (Int.Cl. ⁶ , DB name) E21D 9/12

Claims (5)

(57) [Claims] An excavated earth and sand carrying system of a mud pressure shield construction method in which earth and sand cut by a cutter is filled in a cutter chamber between a partition wall and a face and excavation is performed while discharging earth and sand corresponding to an excavated amount from the cutter chamber. At the pit for launching shield machines , and store excavated sediment
Excavated earth and sand hopper, and excavated earth in the cutter chamber
A first pumping tube for transporting the sand to the excavated soil hopper, is disposed within said pit, the excavated soil Ho said excavated soil
Anda second pumping tube to be transferred out on the ground from the wrapper, the tube diameter of the first pumping tube, said from the shield machine Shi
In the section A to the rear of the rear bogie connected to the
From the rear of the rear bogie to the excavated soil hopper
An excavated earth and sand discharging system, wherein the excavated earth and sand is formed smaller than a pipe diameter in the section B. 2. The section according to claim 1, wherein the excavated earth and sand is conveyed in the section A by a snake pump arranged in the shield machine, and in the section B, the piston pump and the piston pump arranged in a rear portion of the rear bogie. An excavated earth and sand unloading system, which is transported by a relay pump disposed at an appropriate position in a tunnel. 3. An apparatus according to claim 1 or 2, wherein the excavated soil hopper, drilling soil unloading system characterized by having a capacity capable of storing the excavated earth and sand amount corresponding to the work of at least overnight. 4. The claim 1-3, drilling soil unloading system, characterized in that the vertical shaft houses the excavated earth and sand hopper and the height of deep drilling of the excavated earth and sand hopper at the bottom of the vertical shaft . 5. The claim 1, drilling soil unloading system characterized by a sensor for measuring the storage level of the excavation soil into the excavated earth and sand hopper is arranged.