JP4249084B2 - Excavation soil removal method of muddy water type shield method - Google Patents

Description

  The present invention relates to a method for carrying out excavated soil in a muddy water type shield method.

In the muddy water type shield method that excavates with a shield machine in a state where the entire face of the tunnel is filled with muddy water, the shield machine in the tunnel through the shaft from the muddy water treatment facility installed on the construction site (above ground) for the construction concerned The muddy water pipe and the discharged muddy water pipe are arranged until the muddy water pressurized by the pump is circulated toward the face surface (see, for example, Patent Document 1).
JP-A-10-115180

As described above, conventionally, a muddy water pipe and a muddy water pipe are arranged from a muddy water treatment facility installed on the ground to a shield machine in a tunnel through a shaft, and a long pipe for muddy water treatment is required.
In addition, along with the progress of excavation by the shield machine, a mud pump and a mud pump were added in the middle of the tunnel tunnel, and the pipe of the mud was also continuously extended. It is necessary to ensure the stability of the muddy water that is sent to the face as the loss occurs, and therefore it is necessary to control the pressure and flow rate in the piping of the muddy water.
And, since the excavated soil that had been classified by the muddy water treatment facility was transported to the remaining soil disposal site by a dump truck, there was also a concern that it would affect the environment such as traffic congestion and exhaust gas.

The object of the present invention is to improve the efficiency of the muddy water transport process in the muddy water type shield method by minimizing various facilities including pipes for muddy water treatment and immediately treating the muddy water near the rear of the shield machine. It is to simplify the muddy water transport facility and reduce the amount of excavated soil carried out of the tunnel mine.
Furthermore, the subject of this invention is implement | achieving conveyance of excavated soil in consideration of the ground environment.

In order to solve the above-mentioned problems, the invention described in claim 1 is directed to a muddy water type shield method for excavating with a shield machine 1 in a state where muddy water is filled in the face of the tunnel as shown in FIG. In the vicinity of the rear of the shield machine 1 in the 103 mine, a muddy water treatment facility 10 for supplying muddy water to the shield machine 1 and treating muddy water discharged together with excavated soil from the shield machine 1 is disposed, Another service tunnel 111 is excavated from the vertical shaft 101 where the shield machine 1 starts to the vicinity of the river or the coast, and the excavated soil left after classification by the muddy water treatment device 10 in the tunnel 103 is transported to the vertical shaft 101. Then, it is carried out to the vicinity of the river or the coast through the service tunnel 111.

As described above, since the muddy water treatment facility is disposed in the vicinity of the rear of the shield machine, various facilities such as pipes for muddy water treatment are minimally required to extend near the rear of the shield machine. Further, since the muddy water can be immediately processed in the vicinity of the rear of the shield machine, the muddy water transport efficiency is improved and the muddy water transport facility can be simplified.
And since the excavated soil left after the classification treatment by the muddy water treatment device in the tunnel mine is carried out to the shaft or through the service tunnel to the vicinity of the river or the coast, the excavated soil is excavated as compared with the case of carrying out the mud with mud. In addition to reducing the amount of soil transported, ground transportation of excavated soil has been abolished, so there is no concern about the impact on the ground environment.

The invention according to claim 2 is a method for carrying out excavated soil of the muddy water type shield construction method according to claim 1 , for example, as shown in FIG. It is characterized by being transported by water to 113 to a remaining soil disposal site.

  In this way, a large amount of excavated soil can be efficiently transported to the residual soil disposal site by transporting the excavated soil transported from the shaft through the service tunnel to the vicinity of the river or the coast to the residual soil disposal site by a ship.

According to the first aspect of the present invention, since the muddy water treatment facility is disposed in the vicinity of the rear of the shield machine, various facilities including the pipe for muddy water treatment are sufficient to extend to the vicinity of the rear of the shield machine. In addition, since the muddy water can be treated immediately in the vicinity of the rear of the shield machine, the muddy water transport efficiency can be improved and the muddy water transport facility can be simplified.
And, compared with the case where the excavated soil is carried out together with the mud by carrying out the remaining excavated soil classified by the mud treatment device in the tunnel mine to the shaft or the vicinity of the river through the service tunnel, In addition to reducing the amount of excavated soil carried out, the ground transportation of excavated soil has been abolished, so there is an advantage that there is no fear of affecting the ground environment.

According to the second aspect of the present invention, in addition to the effect obtained by the first aspect of the invention, the excavated soil carried from the shaft through the service tunnel to the vicinity of the river or the coast is moved to the remaining soil disposal site by the ship. By transporting, there is an advantage that a large amount of excavated soil can be efficiently transported to the remaining soil disposal site.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
1 and 2 showing the configuration of an embodiment to which the present invention is applied, 1 is a shield machine, 2 is a segment supply carriage (rear carriage), 3 is a control room, 4 is a segment carriage, 5 is a towing vehicle, 6 is a fluid transport carriage, 7 is a primary treatment carriage, 8 is a secondary treatment carriage, 9 is a hoist, 10 is a muddy water treatment plant, 11 is a tow truss (pier, hoist beam), 21 is a primary treatment line, 31 is It is a secondary processing line.

As shown in the figure, a control room 3 is provided at the upper part of a segment supply receiving carriage 2 that is arranged immediately after the shield machine 1 excavating a large-section tunnel and is pulled by the shield machine 1. In the example shown in the drawing, the segments mounted on the segment carriage 4 connected to each other are supplied to the segment supply receiving carriage 2 as described later. A towing vehicle 5 is connected to the front and rear of the segment cart 4.
In the example shown in the drawing, in the vicinity of the rear of the shield machine 1, that is, in the vicinity of the rear of the segment supply carriage 2, three-carriage trucks 6, 7, and 8 are arranged. A muddy water treatment plant 10 is installed at 7.8.

The carts 6, 7, 8 equipped with the muddy water treatment plant 10 are constructed at the bottom of the shield tunnel, with the first cart 6 being connected to the segment supply cart 2 via a traction truss 11 as shown in the figure. Move on the floor slab. The carts 6, 7, and 8 are substantially gate-shaped so that the segment cart 4 that also moves on the floor slab can be passed by towing the towing vehicle 5.
The tow truss 11 also serves as a pier and is equipped with a hoist beam.
In addition, the segment transportation conveyor equipment can be provided in the upper part of the traction truss 11, and the segment supply can be provided in a manner not using a hoist by providing the segment dedicated elevators at both ends thereof.

The hoist 9 moves on the floor slab, passes through the gate-shaped carts 6, 7, 8 and stops in front of the segment cart 4, and lifts the segment to the hoist beam 11 It moves on the segment supply receiving cart 2 by moving along. The segments placed on the segment supply receiving carriage 2 are assembled by an erector in the shield machine 1 by a segment supply device (not shown), and thereby lining is performed.
The hoist 9 can also be set at the bottom of the shield tunnel as shown by lifting a precast box culvert from the segment cart 4 (or a culvert cart not shown).

As shown in FIG. 2, the muddy water treatment plant 10 is mounted on the first muddy water pump (mud water sand pump) 12 and the adjustment tank 14 mounted on the first fluid transport carriage 6, and on the second primary treatment line truck 7. The secondary processing line 21 and the secondary processing line 31 mounted on the third secondary processing line carriage 8 are configured.
The primary processing line 21 includes a low head screen 22, a sand separator 24, a muddy water receiving tank 25, a slurry tank 26, and the like. The secondary treatment line 31 includes a filter press 32, a press pump 33, a muddy water treatment device 34, and the like. The above devices are mounted separately on the left and right sides of the carts 6, 7 and 8 having a substantially gate shape.

A muddy water pipe 13 that connects the muddy water pump 12 and the shield machine 1 is provided, and a muddy water pipe 23 that connects the low head screen 22 and the shield machine 1 is provided.
Moreover, the earth removal belt conveyor 35 is mounted in the secondary processing line trolley | bogie 8, and the underground belt conveyor 36 is continuously provided in the back.

In the muddy water treatment plant 10 described above, the muddy water discharged from the shield machine 1 passes through the muddy water pipe 23 and is stored in the muddy water receiving tank 25 through the low head screen 22, and as shown in FIG. A cyclone pump 27 passes the cyclone 28 to the sand separator 24, and sand is removed from the discharged mud water as a primary treatment.
Here, the low head screen 22 separates large gravel / consolidated silt contained in the drained muddy water from the muddy water. The muddy water from which large gravel and consolidated silt are separated by the low head screen 22 is stored in the muddy water receiving tank 25.
The cyclone pump 27 feeds the muddy water in the muddy water receiving tank 25 to the cyclone 28.
The cyclone 28 is installed in the upper part of the sand separator 24, generates a cyclone (vortex) in the muddy water, and separates sand / clay water using a specific gravity difference. The sand separated by the cyclone falls on the sand separator 24, and clay water (sludge water) is sent to the slurry tank 26.
The sand separator 24 is a vibration type sieving device for the purpose of dehydrating water adhering to the sand particles. The dehydrated sand is taken out by the sand separator 24 and the water falls into the muddy water receiving tank 25.

Then, the muddy water is supplied to the shield machine 1 through the slurry tank 26 and the adjusting tank 14 through the muddy water pump 13 through the muddy water pump 13, while being processed in a muddy water treatment tank 34 such as a secondary / tertiary treated water tank. The Further, the muddy water treated in the muddy water treatment tank 34 is sent to the filter press 33.
Thus, in the vicinity of the rear of the segment supply carriage 2 immediately after the shield machine 1 that performs the muddy water shield excavation, a mobile muddy water treatment facility is arranged and configured in the shield tunnel.

As described above, since the muddy water treatment plant 10 is located in the vicinity of the rear of the segment supply cart 2 immediately after the shield machine 1, piping for muddy water treatment by the muddy water treatment plant 10 mounted on the carts 6, 7, 8. (The muddy water pipe 13 and the discharged muddy water pipe 23) need only have a minimum length that extends from immediately after the shield machine 1 to the muddy water treatment plant 10 in the vicinity of the rear of the segment supply carriage 2. Moreover, by being pulled by the shield machine 1, the pipe length does not change, and no extension or installation of a relay pump is required.
Then, in the vicinity of the rear of the segment supply receiving carriage 2 immediately after the shield machine 1, muddy water can be immediately treated by the mobile muddy water treatment plant 10, and muddy water transport efficiency can be improved. Moreover, the treated muddy water can be returned to the shield machine 1 in the shortest time. Therefore, the muddy water transport facility can be simplified.

  In addition, the soil treated by the muddy water treatment plant 10 is partially filled in a gap between structures built in the tunnel mine, in the embodiment, a gap in the invert 104, and the rest is discharged outside the tunnel mine. That is, the sand subjected to the primary classification treatment in the primary treatment line 21 and the clay subjected to the secondary classification treatment in the secondary treatment line 31 are partially filled on both sides of the precast box culvert in the illustrated example, and the remaining Is discharged from the earth discharging belt conveyor 35 to the outside by the underground belt conveyor 36. Therefore, the excavated soil can be used effectively, and the amount of sediment discharged outside the tunnel mine can be reduced.

FIG. 4 shows a deep shield tunnel construction system to which the present invention is applied, oblique start A from a low earth covering, underground processing B of excavated soil, simultaneous construction C of invert, local production D of a segment, tire type It shows the entire system from material / equipment transportation E by transport vehicles, service tunnel utilization F, barge loading / ship transportation G.
In FIG. 3, 101 is a vertical shaft, 102 is a tilt shaft, 103 is a shield tunnel, 104 is an invert, 105 is a segment factory, 106 is an air purification device, 107 is a ventilation fan, 108 is a ventilation pipe, 109 is a building, and 110 is a segment A transport truck, 111 is a service tunnel, 112 is a material transporter, and 113 is an earth transport ship.

First, as shown in the drawing, the shield tunnel 103 is constructed in a shallow shaft 101 including a tilt shaft 102 by a diagonal start A from a low earth covering. In this way, by making the diagonal start A by the low earth covering from the shallow shaft 101, cost reduction as well as consideration for the surrounding environment is achieved.
And as mentioned above, by performing the underground processing B of excavated soil, simplification of the muddy water transport facility and minimization of the ground work site are achieved. Furthermore, the simultaneous construction C of the invert 104 is performed, so that the entire construction is speeded up and the excavated soil is effectively used.

On the other hand, a segment factory 105 is installed around the shaft 101 on the ground. In this way, the local production D of the segment is performed to reduce the environmental load as well as cost reduction.
An air purification device 106 is installed at the ground opening of the shaft 101. This air purification device 106 includes a ventilation pipe 108 having a ventilation fan 107 disposed at the tip of a tunnel mine, and a purification treatment from a chimney 109a of an enclosure 109 that covers the ground opening of the vertical shaft 101 to a high place. Air is exhausted. Thus, the load on the surrounding environment is reduced along with the improvement of the underground mine environment.

Here, the segment manufactured in the segment factory 105 around the shaft 101 is also performed by the segment conveyance truck 110 from the shaft 101. In other words, both the towing vehicle 5 and the segment cart 4 described above and the segment transport truck 110 perform the material / material transport E by the tire transport vehicle. In this way, while aiming at simplification of the underground facilities, it is aiming at conveying materials and equipment that are particularly effective in large-section construction.
The inclined shaft 102 is provided with stretch belt conveyors 37 and 38 continuously to the above-described underground belt conveyor 36.
In this way, the stretching belt conveyors 36, 37, and 38 provided from the muddy water treatment plant 10 to the vertical shaft 101 in the shield tunnel 103 are used to increase the efficiency of tunnel excavation work and to excavate soil that is effective for long-distance construction. It has become.

Next, the service tunnel 111 is excavated from the shaft 101 to the river mouth and the coast. The service tunnel 111 is provided with a stretching belt conveyor 39 that is continuous with the stretching belt conveyor 38 of the inclined shaft 102. Thus, the excavated soil is discharged using the service tunnel 111. Further, the material transport vehicle 112 is caused to pass through the service tunnel 111.
In this way, the service tunnel 111 is utilized to improve the efficiency of carrying out excavated soil while considering the surrounding environment.

Then, the excavated soil discharged from the extending belt conveyor 39 of the service tunnel 111 is loaded on the earth ship 113 and transported to the landfill (residual land disposal site) on the water (sea).
By this barge loading and ship transportation G, consideration is given to the surrounding environment and the efficiency of the remaining soil treatment is improved.

  Due to the above-described deep shield tunnel construction system, the shaft base has no muddy water treatment facilities and a site (yard) for carrying out residual soil, and instead of the conventional large-scale shaft, a small shallow shaft for starting shield machines For this reason, the work area on the ground necessary for the construction work may be small, and for example, the problem of securing the land in the urban area is reduced.

In the above embodiment, the muddy water treatment plant is divided and mounted on three carriages, but the present invention is not limited to this, and the specific arrangement of the carriage and the configuration of the plant are not limited thereto. It may be a configuration.
Further, in the embodiment, the soil treated by the muddy water treatment plant is filled in the gap of the invert, but the gap is not limited to the invert but may be filled in a gap of another structure constructed in the tunnel mine.
Furthermore, it is needless to say that other specific detailed structures can be appropriately changed.

1 is a schematic perspective view showing a configuration of an embodiment to which the present invention is applied, showing a shield machine and a muddy water treatment facility. It is a schematic side view similarly. It is the figure which showed the flow of the primary process. 1 shows a deep shield tunnel construction system to which the present invention is applied, oblique start A from low earth covering, underground treatment B of excavated soil, simultaneous construction C of invert, local production D of segment, tire type transport vehicle It is the outline figure which showed the whole system to material equipment conveyance E, utilization F of service tunnel, barge unloading, and ship transportation G.

Explanation of symbols

1 Shield machine 2 Segment supply trolley (rear trolley)
3 Control room 4 Segment bogie 5 Towing vehicle 6 Fluid transport bogie 7 Primary treatment line bogie 8 Secondary treatment line bogie 9 Hoist 10 Mud treatment plant 11 Traction truss (pier, hoist beam)
12 Muddy water pump 13 Muddy water pipe 14 Adjustment tank 21 Primary treatment line 22 Low head screen 23 Drainage water pipe 24 Sand separator 25 Muddy water receiving tank 26 Slurry tank 27 Cyclone pump 28 Cyclone 31 Secondary treatment line 32 Filter press 33 Press pump 34 Muddy water Processing device 35 Earth removal belt conveyor 36 Underground belt conveyor 37/38/39 Stretch belt conveyor 101 Vertical shaft 102 Slope shaft 103 Shield tunnel 104 Invert 105 Segment factory 106 Air purification device 107 Ventilation fan 108 Ventilation piping 109 Building 110 Segment transport truck 111 Service tunnel 112 Material Handling Vehicle 113 Earth Cargo (Ship)

Claims (2)

In the muddy water shield method of excavating with a shield machine in a state where muddy water is filled to the face of the tunnel,
In the vicinity of the rear of the shield machine in the tunnel mine, while the muddy water treatment equipment for supplying the muddy water to the shield machine and treating the muddy water discharged together with the excavated soil from the shield machine is arranged,
Drill another service tunnel from the vertical shaft where the shield machine starts, to the vicinity of the river or the coast,
Excavation soil removal by the muddy water type shield method, wherein the remaining excavated soil classified by the muddy water treatment facility in the tunnel mine is carried out to the vertical shaft and then to the vicinity of the river or the coast through the service tunnel. Method. The excavated soil carrying out excavated soil in the muddy water type shield method according to claim 1 , wherein the excavated soil carried out in the vicinity of the river or the coast is transported by water to a remaining soil disposal site.

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