JP2002180790A - Slurry transporting system and slurry transporting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slurry transporting system which is available for high- speed excavation without strengthening the capacity thereof for transporting and treating discharged slurry, and to provide a slurry transporting method using the system. SOLUTION: The slurry transporting system is comprised of a diverting device 10 for diverting discharged slurry to a plurality of diverted channels at a predetermined diversion ratio, and a storage tank 30 for temporarily storing the discharged slurry by a storage diverted pipe 55 which is one of the diverted channels. Then, a control valve 44 is closed at predetermined timing to prevent the discharged slurry from flowing through a diverted pipe 54. Further, a control valve 45 is opened, and earth stored in the storage tank 30 and targeted for primary treatment is transported toward primary treatment facilities on the ground.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a muddy water transport system and a muddy water transport method for transporting muddy water, and more particularly, to a muddy water transport system and a muddy water transport method for transporting muddy water generated as a shield machine excavates. .

[0002]

BACKGROUND OF THE INVENTION In recent years,
Long-distance excavations and deep excavations are being performed. In such a case, it is preferable to excavate at high speed in order to shorten the construction period.

[0003] However, even if an attempt is made to excavate at high speed, there is a limit in the transport capacity and treatment capacity of the wastewater containing excavated earth and sand.
These restrictions on transportation and processing capacity hinder high-speed drilling.

[0004] Specifically, for example, when excavation is performed at about 50 mm / min using a shield excavator, if the excavation is performed at about 100 mm / min in order to perform high-speed excavation, the specific gravity of the wastewater is reduced. It gets too high. For this reason, it is necessary to increase the diameter of the sludge pipe for transporting the sludge water,
The transport capacity of the mud pump and relay pump must be enhanced, and the capacity of the above-ground mud treatment equipment must be at least doubled.

[0005] Further, even if an attempt is made to enhance the transport capacity of a sludge pump or the like, a sludge pump or the like having the required capacity is not actually provided, or the transport capacity of the sludge pump or the like is enhanced. If this is done, the cost will increase significantly.

That is, the diameter of the drainage pipe is increased,
In order to use a large-sized sludge pump, the diameter of the tunnel must be increased so as to accommodate the sludge pipe and the sludge pump and not to hinder the transportation of the segment. Will be greatly increased.

Further, in general, a state in which excavation is performed and a state in which excavation is stopped and support is performed are repeated, and excavation and excavation are performed. In such a case, in the wastewater treatment equipment, the processing load is high while the excavation is started and the wastewater is supplied to the treatment equipment, and the wastewater after the excavation is stopped and the drilling is resumed is supplied to the treatment equipment. Since the processing load is low until it is supplied, the utilization efficiency of the processing equipment is poor.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a muddy water transport system and a muddy water transport method applicable to high-speed excavation. Further, another object of the present invention is to provide a muddy water transport system and a muddy water transport method capable of leveling a muddy water transport load and a muddy water treatment load.

[0009]

In order to solve the above problems, a muddy water transport system according to the present invention transports muddy water generated during excavation from a face to a primary treatment facility via a muddy water transport path. The muddy water transport system is characterized in that the muddy water transport path includes a storage means for temporarily storing the primary treatment target soil contained in the muddy water.

According to the present invention, by temporarily storing the primary treatment target soil, the transport amount of the primary treatment target soil can be adjusted. For example, assuming that the collected amount of the primary treatment target soil in the primary treatment facility is 100 and the amount to be temporarily stored is 50, first, the primary treatment target soil that is not stored is treated by the primary treatment facility, and the primary treatment facility is empty. Then, the primary treatment target soil that has been stored is subjected to primary treatment by a primary treatment facility.

That is, for example, in the case of shield excavation,
The above-described excavation and support are repeatedly performed for each excavation of one ring. For this reason, conventionally, the processing equipment has been fully operated during the excavation, and the primary processing equipment has hardly been operated until the excavation of one ring is completed and the excavation of the next ring is performed.

According to the present invention, by temporarily storing, in the case described above, instead of carrying out 100% of transportation, 50% of half of the transportation is carried out to process the primary treatment target soil. Thereby, the transport load and the processing load can be equalized. In addition, even when high-speed excavation is performed, excavation can be performed using the same transport equipment and processing equipment as those used during normal excavation without increasing transport equipment and processing equipment.

Further, even if the transportation equipment and the processing equipment are increased, the excavation can be performed with the minimum necessary enhancement.

Here, the high speed excavation is, specifically, for example, when excavating using a shield excavator, the excavation is performed at 50 mm / min in normal excavation, but is performed at 100 mm / min in high speed excavation. This corresponds to a case where digging is performed faster than usual, such as when digging is performed.

Also, there is provided a diversion means for diverting the discharged muddy water in the muddy water transport path to a plurality of branch channels which are a part of the muddy water transport path, and for joining the separated wastewater to the muddy water transport path. Preferably, the storage means temporarily stores the primary treatment target soil contained in the muddy water in at least one of the plurality of branch channels.

According to this, the flow path for temporary storage and the flow path for non-temporary storage are separated, thereby making it easier to control the transport of the primary treatment target soil. For example, during temporary storage, draining using the non-temporary storage channel,
By temporarily closing the flow path that is not temporarily stored at a predetermined timing and discharging the temporarily stored primary processing target soil, the transport amount of the primary processing target soil can be equalized.

[0017] It is preferable that control means is provided for sending the primary treatment target soil stored in the storage means to a muddy water transport path downstream of the storage means at a predetermined timing.

According to this, storage and delivery can be appropriately controlled.

Here, the predetermined timing may be, for example, the timing of stopping the excavation, the timing when the stored amount exceeds a predetermined amount, the timing when the specific gravity of the stored muddy water exceeds a predetermined value, the transport load or the like. This corresponds to the timing at which the processing load is reduced.

[0020] The control means may selectively store the stored primary processing soil and the non-primary processing target soil into the muddy water transport path by opening and closing a flow path opening / closing means provided in the branch flow path. It is preferable to join.

[0021] According to this, the muddy water is selectively joined to the muddy water transport path, so that the muddy water (primary soil to be treated) is formed.
Transport volume can be leveled.

Here, as the passage opening / closing means, for example, a valve or the like is applicable.

[0023] Further, the plurality of branch channels are not provided with the storage means, and at least one direct branch channel which directly joins the muddy water transport path, and at least one storage channel provided with the storage means. A dividing channel, wherein the dividing unit is configured so that the control unit controls the flow rate of the wastewater to the direct dividing channel and the flow rate of the wastewater to the storing dividing channel to a predetermined ratio. It is preferable to include a split ratio determining means controlled by

According to this, the amount of processing in the primary processing facility can be adjusted by controlling the split ratio. That is, for example, when the processing load on the primary processing equipment is high, the processing load can be reduced and the primary processing can be performed efficiently by increasing the storage ratio.

[0025] In addition, the system includes flow rate measuring means for measuring the flow rate of the waste water in at least one of the muddy water transport path and the branch flow path, and the control means controls the flow rate of the waste water measured by the flow rate measuring means. It is preferable to control at least one of the split ratio determining means and the flow path opening / closing means based on this.

According to this, even if the amount of muddy water due to excavation varies, the distribution load and the processing load are leveled by controlling the branch flow according to the variation, so that the muddy water transport and the like can be efficiently performed. It can be performed.

As the flow rate measuring means, for example, a flow meter, a density meter (specific gravity meter) and the like can be applied.

[0028] Further, the wastewater is wastewater generated as the shield machine excavates, and the control means includes:
Based on the timing of stopping the excavation of the shield excavator,
It is preferable that the primary treatment target soil stored in the storage unit is joined to the muddy water transport path.

According to this, the stored muddy water can be transported and processed while the muddy water transportation path and the muddy water treatment equipment are vacant when the excavation is stopped. Can also be adapted.

The shield machine further comprises a plurality of preceding bits forming a plurality of preceding excavation grooves in the ground, and a solid ground protruding portion dug between the preceding excavation grooves formed by the preceding bits. And at least one trailing bit to be cut and excavated in a state, and the storage means preferably stores the cut and excavated solids.

When storing muddy water, sandy soil can be stored relatively easily if sandy soil is excavated, but it is not easy to store cohesive soil.

According to this, even in the case of cohesive soil excavation, it can be stored properly by transporting it in a solid state.

Here, the solid state means a state in which the skeletal structure of the soil particles is maintained during excavation in the same manner as the ground state.

[0034] Preferably, the storage means includes a storage tank having sedimentation means for sedimenting the solid content, and discharge means for discharging the sedimented solid content.

The muddy water treatment method according to the present invention is directed to a muddy water transport method for transporting muddy water generated along with excavation from a face to a primary treatment facility via a muddy water transportation path.
In the muddy water transport path, while temporarily storing the primary treatment target soil included in the wastewater, the primary treatment target soil not stored, a storage step of transporting the primary treatment target soil through the muddy water transport path to the primary treatment facility, And temporarily stopping transportation of the unretained wastewater based on a predetermined timing and sending out the stored primary treatment target soil to the primary treatment facility.

According to the present invention, by repeatedly performing the storage step and the stored soil transporting step, the transport load and the processing load are reduced as compared with the conventional case where the primary processing target soil is transported without storage at all. This enables efficient transportation and processing even when performing high-speed excavation.

Here, the predetermined timing includes, for example, the timing of stopping the excavation, the timing when the stored amount exceeds a predetermined amount, the timing when the specific gravity of the stored mud exceeds a predetermined value, and the mud transport load. And the timing when the muddy water treatment load is reduced.

Further, the method includes a flow rate measuring step of measuring a flow rate of the waste water in the muddy water transport path, wherein the storing step adjusts a storage amount of the primary treatment target soil based on the measured flow rate of the waste water. It is preferable to include the step of performing.

According to this, since the storage amount does not become too small or too large, it is possible to transport the primary treatment target soil comfortably.

In addition, the flow rate measuring step includes a step of measuring a storage amount of the muddy water in the storage step. In the storage soil transporting step, when the storage amount reaches a predetermined amount, the storage amount is stored. It is preferable that the soil to be subjected to the primary treatment is sent out to the primary treatment facility.

According to this, by grasping the storage amount, the stored wastewater can be sent to the muddy water treatment facility at an appropriate timing.

The wastewater is wastewater generated in the excavation step of the shield excavator. In the stored soil transporting step, the primary treatment target stored is based on the timing of stopping the excavation of the shield excavator. Preferably, the soil is sent to the primary treatment facility.

According to this, it is possible to transport and process the stored primary treatment soil in a state in which the muddy water transport path and the primary treatment facility at the time of excavation stop are empty, so that the primary treatment capacity and the like are leveled, It can be adapted to high speed excavation.

The excavation process of the shield excavator includes:
A step of forming a plurality of preceding excavation grooves in the ground, and a step of cutting and excavating the ground protruding portion left undigged between the preceding excavation grooves in a solid state, and in the storage step, cutting and excavation are performed. It is preferable to store the solid content.

According to this, even in the case of cohesive soil excavation, it can be stored properly by transporting it in a solid state.

[0046]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings by taking as an example a case where the present invention is applied to a muddy water transport system used in a muddy water shield method. Here, the description will be made on the assumption that the ground of the cohesive soil is excavated at a high speed excavation speed higher than a normal excavation speed.

(Description of Mud Flow) FIG. 1 is a schematic diagram of a mud transport system according to an example of the present embodiment.

The muddy water whose specific gravity and viscosity are adjusted by the above-mentioned mud conditioning equipment is sent to the chamber 210 through the muddy pipe 50, and the cutting face is excavated by the cutter head 22 while stabilizing the cutting face.

The excavated earth and sand is taken into the chamber 210, mixed with the muddy water in the chamber 210, and is grounded through the muddy water transport passages 53 and 52 by the pumping power of the muddy water pump 62 and the relay pump 60. Transported to the primary treatment facility.

In the present embodiment, the muddy water discharged from the chamber 210 is transported in the muddy water transportation at the muddy discharge stage.
Divides the flow into a plurality of branch channels, temporarily stores the primary processing target soil contained in the wastewater at a part of the branch channel, and directs the stored primary processing target soil to the primary processing facility at a predetermined timing. The method of transportation is adopted.

Here, the predetermined timing includes, for example, the timing of stopping the excavation, the timing when the stored amount exceeds a predetermined amount, the timing when the specific gravity of the stored mud exceeds a predetermined value, and the mud transport load. And the timing when the muddy water treatment load is reduced.

More specifically, a diversion pipe 10 serving as a diversion ratio determining means is provided in a drain pipe 53 for transporting the mud water from the chamber 210, and a direct diversion channel that directly joins the drain pipe 52 from the diversion apparatus 10. Diversion pipe 54 and the storage tank 3
The flow is diverted to the storage diversion pipe 55 provided with zero. Then, the separated wastewater is selectively joined to the wastewater pipe 52.

The muddy water from the storage diversion pipe 55 is supplied to the storage tank 30 as storage means.

The storage tank 30 includes a resistance plate 32 provided near the inlet of the storage tank 30 and a screw conveyor 34 provided at the bottom of the storage tank 30. The screw conveyor 34 is a motor 3
6 is driven to rotate.

Solid matter such as earth and sand from the muddy water injected into the inlet of the storage tank 30 is stored at the bottom of the storage tank 30 by the resistance plate 32. It is sent from the upper part in the storage tank 30 to the primary treatment facility on the ground.

A solids discharge pipe 57 is connected to the bottom of the storage tank 30 on the outlet side, and a supernatant discharge pipe 56 is connected to the upper part of the storage tank 30 on the outlet side.

In this embodiment, the muddy water of the supernatant discharge pipe 56 and the muddy water of the diversion pipe 54 and the solids discharge pipe 57
The mud transport is controlled so that the waste water is alternately sent to the primary treatment facilities on the ground.

The reason for this is that in the case of high speed excavation, the amount of drainage water may be larger than in the case of normal excavation. When the amount of muddy water increases, a large pump must be used for the muddy water pump or a large one must be used for the muddy water treatment equipment, which increases the processing cost. In particular, when a large pump is used for the sludge pump, the ratio of the pump to the tunnel cross-sectional area becomes large, and it becomes impossible to transport the segments.

In general shield excavation, since excavation and stoppage are repeated every time one ring is constructed, the primary treatment amount in the primary treatment equipment also varies in accordance with this (the variation in the muddy water treatment amount will be described later in detail). .).

Therefore, even in high-speed excavation, it is necessary to equalize the primary treatment amount in order to apply the same transport equipment and treatment equipment as in the past, and for this purpose, a plurality of wastewater passages are provided. It is necessary to control the transportation of muddy water so that the soil to be subjected to the primary treatment is selectively sent from the flow path of each wastewater to the primary treatment facility on the ground.

In the present embodiment, the following muddy water transport control is performed.

(Explanation of Control) A gamma ray density meter 72 is provided on the sludge pipe 53, and a gamma ray density meter 74 is provided on the sludge pipe 52 at a portion before merging with the branch pipe 54. These gamma ray densitometers 72 and 74 also function as a part of the flow rate measuring means.

Gamma ray density meter 72 and gamma ray density meter 7
The output of 4 is input to the arithmetic unit 76. This allows
The specific gravity of the wastewater before being charged into the storage tank 30 and the specific gravity of the wastewater discharged from the storage tank 30 are known.

Further, a flow meter 80 is provided in the sludge pipe 53, a flow meter 82 is provided in the storage branch pipe 55, and a flow meter 84 is provided in the part of the sludge pipe 52 before merging with the branch pipe 54. . Each of the flow meters 80 to 84 is configured to measure the flow rate of the muddy water and measure the flow rate from the product of the cross-sectional area of the pipe such as the drainage pipe 52 and the flow rate. The measurement results of these flow rates are input to the arithmetic unit 76. Thus, the amount of muddy water before being charged into the storage tank 30 and the amount of muddy water discharged from the storage tank 30 are known.

As described above, the amount of muddy water containing solids stored in the storage tank 30 can be determined.

Further, the specific gravity difference, the amount of muddy water, and the amount of solid content obtained by the arithmetic unit 76 are input to the control unit 78. The control device 78 controls the flow dividing device 10 based on the specific gravity and the like such that the wastewater has an appropriate specific gravity and the transport amount of the primary treatment target soil per unit time is appropriate.

The reason for adjusting the specific gravity is that if the specific gravity is too high, the relay pump 60 or the like may be blocked. Specifically, for example, in a 4-inch drainage pipe 52, it is preferable to adjust the specific gravity of the wastewater so that the specific gravity becomes about 1.36 at the maximum.

The reason why the amount of muddy water is adjusted is that if the amount of muddy water per unit time becomes too large, the muddy water treatment equipment on the ground cannot process the muddy water.

In order to appropriately control the specific gravity, the flow rate, and the like, in the present embodiment, a plurality of wastewater channels are provided, and the wastewater is selectively supplied from each wastewater channel to the primary treatment facility on the ground. The muddy water transport is controlled to send it to the mud.

In order to control the transportation of the muddy water, the control valve 40 is connected to the mud feed pipe 50, the control valve 41 is connected to the mud discharge pipe 53, and the bypass pipe 51 connecting the mud feed pipe 50 near the chamber 210 and the drain pipe 53. , A control valve 44 is provided in a diversion pipe 54, and a control valve 45 is provided in a solids discharge pipe 57. These control valves 40 to 48
Functions as a flow path opening / closing means, and is controlled to be opened / closed by the control device 78. In FIG. 1, the control valve 78 controls each of the control valves 40 to 48 for easy viewing.
The line indicating the control to is omitted.

That is, the control valves 40 to 48
A storage step of temporarily storing part of the muddy water in the muddy water transport path by controlling the opening and closing of the muddy water transport path, and transporting the untreated primary soil to the primary treatment facility through the muddy water transport path. , Based on predetermined timing,
The step of temporarily stopping the transport of the wastewater that is not stored and the step of transporting the stored primary treatment soil to the primary treatment facility can be repeatedly performed.

For example, in the storage step, the control valves 40, 41, 44, 48 are opened, the control valves 42, 45 are closed, and excavation is performed by a shield excavator. In this state, the branch pipe 54 is
And the wastewater is sent from the supernatant discharge pipe 56 to the primary treatment facility on the ground. In this state, a part of the muddy water is stored in the storage tank 30.

On the other hand, in the stored soil transportation step, the control valves 40, 41, 44, and 48 are closed, and the control valves 42 and 45 are opened, and excavation by the shield excavator is stopped. In this state, the wastewater in the storage tank 30 is sent from the solids discharge pipe 57 to the primary treatment facility on the ground using the relay pumps 60 and 61 and the like.

Although the specific gravity of the muddy water in the storage tank 30 is increased by the solid content storage, the muddy water is supplied by the mud feeding pipe 50, the bypass pipe 51, the mud discharging pipe 53, and the storage diversion pipe 5.
5 and into the storage tank 30,
It is adjusted to an appropriate specific gravity. Thereby, the relay pump 6
The same pump or the like as before can be used without blocking 0, 61 and the like.

As described above, by providing a plurality of wastewater channels and selectively sending the wastewater from each of the wastewater channels to the primary treatment facility on the ground, the conventional method of transporting the wastewater without storing it at all. Mud transport load and primary treatment load can be reduced as compared with the case of performing drilling, and mud transport and primary treatment can be performed efficiently even when performing high-speed excavation.

Further, the control device 78 determines whether or not the flow ratio in the flow dividing device 10 is appropriate based on the measurement results such as the flow rate of the mud water and the solid content contained in the mud water.
The flow dividing device 1 is adjusted so that the flow dividing ratio in the flow dividing device 10 is adjusted.
Control 0.

(Description of Flow Divider) Next, the structure of the flow divider 10 will be described.

FIG. 2 is a schematic diagram of a flow dividing device 10 according to an example of the present embodiment. FIG. 2A is a diagram of the flow dividing device 10 as viewed from the front, and FIG. It is the figure which looked at 10 from the side.

The flow dividing device 10 includes a rectifying vane 11 connected to a mud pipe 53 and an outlet 12 connected to a diversion pipe 54.
And the outlet 13 connected to the storage diversion pipe 55, and connected to the rectifying vane 11, the outlet 12, and the outlet 13,
Distributor 14 with built-in Y-shaped partition plate
And an electric actuator 15 that rotationally drives the partition plate
It is comprised including.

The electric actuator 15 is connected to the control device 7
Based on the control signal from 8, the partition plate is driven to rotate, and the ratio of the flow to the discharge port 12 and the discharge port 13 is adjusted. FIG.
As shown in (A), when the partition plate is located at the center of the rectifying vane 11, the flow is divided at the same ratio.

By controlling the split ratio using the control device 78 as described above, the amount of processing in the primary processing equipment can be adjusted. That is, for example, when the processing load on the primary processing equipment is high, the processing load can be reduced and the primary processing can be performed efficiently by increasing the storage ratio.

When excavating sandy soil, solids easily settle out naturally in the storage tank 30, but when excavating cohesive soil, solids hardly settle. Need to be easy to do. For this reason, in the present embodiment, the cutter head 22 is configured to cut and excavate the ground in a solid state.

(Explanation of Cutter Head) FIG. 3 is a front view of the cutter head 22 according to an example of the present embodiment.

The cutter head 22 has a plurality of leading bits 90-for forming leading digging grooves on the face at predetermined intervals.
1-90-11, 92-1 to 92-8, and a plurality of trailing bits 94-1 to 94-9 for cutting the unexcavated ground protrusions between the preceding excavation grooves, and curves A copy cutter 95 used for excavation or the like is provided.

Leading bits 90, 92 and trailing bit 9
By rotating the cutter head 22 provided with the cutter 4 in the direction of the arrow shown in FIG. 3, the ground in the excavation path is cut out and excavated in a solid state. The leading bits 90, 9
The second and subsequent bits 94 are formed in a shape that can be excavated even when driven to rotate in the direction opposite to the arrow shown in FIG.

Here, the leading bit is the cutter head 2
The leading bits 90-1 to 90-11 fixed to the two spoke units 24-1 to 24-3, and the cutter head 2
2 are included.

FIG. 4 is a schematic plan view showing the ground excavation state by the leading bits 90 and 92 and the trailing bit 80. FIG. 4 (A) shows the state before the preceding excavation, and FIG. After the excavation, FIG. 4C is a diagram showing the excavation state of the ground 300 after the subsequent excavation.

First, in the initial state, as shown in FIG. 4A, the excavation surface 410 of the ground 300 at the portion to be excavated is flat.

The shield machine is shown in FIGS. 4 (A) to 4 (C).
Dig in the direction of the arrow shown. When the shield machine excavates, the leading bits 90 and 92 precede the trailing bit 80 and excavate the ground 300 at the portion to be excavated in a streak shape, thereby forming the preceding excavation groove 310-1 on the excavation surface of the ground 300. , 31
0-2 are formed.

The preceding excavation grooves 310-1 and 310-2 have a depth, ie, a cutting depth L2, of approximately L, and an interval L1 between the preceding excavation grooves 310-1, 310-2 of approximately L. . Here, L is the above-described sludge pump 6 shown in FIG.
It is the largest size that does not block transportation facilities such as 2.

Further, the preceding excavation grooves 310-1, 310-2
, That is, the cutting width L3 is also equal to or less than L.
As a result, the excavated material generated by the preceding excavation also has a size of L or less, and the excavated material can be carried out of the mine without blocking the transportation facilities.

By the preceding excavation, the state shown in FIG. 4A is changed to the state shown in FIG. 4B.

In the state shown in FIG. 4B, the preceding excavation grooves 310-1 and 310-2 of the ground 300 at the portion to be excavated.
In this state, a belt-shaped convex portion having a protruding length and a protruding width of L or less is left as a ground.

In this state, by excavating and excavating a part of the remaining band-shaped convex portion, the excavated object 110
00, and the state shown in FIG. As a result, the excavated object 110 is cut out and excavated in a cubic shape having a length L. In this process, FIGS.
The rotation speed of the cutter head 22 and the excavation speed of the shield excavator are adjusted so that the cutout amount of excavated earth and sand in the depth direction (C) (that is, the rotation direction of the cutter head 22) is also L or less.

As described above, by cutting and excavating, even if the ground is cut and excavated in a solid state and the excavation is performed on the soil with a lot of viscous soil, the excavation and excavation can be properly performed in the storage tank 30. can do.

As described above, the muddy water is divided by using the dividing device 10, and the storage tank 3 provided in one of the dividing passages is separated.
By temporarily storing the wastewater at 0, the transport amount of the wastewater can be adjusted. As a result, since the muddy water can be transported using the same sludge drain pipe 52 and sludge treatment equipment as in the past, low cost and high speed can be achieved without increasing the diameter of the tunnel or the diameter of the sludge pipe 52. Digging can be performed.

The present invention is effective not only for high-speed excavation but also for leveling the primary processing amount.

FIG. 5 is a schematic diagram showing a change in the primary processing amount over time after the start of excavation.

Generally, when shield excavation is performed, the excavation and stoppage of the shield excavator are repeated every time one ring of the segment is constructed. Therefore, conventionally, the processing amount increases when excavation is performed, and the processing amount decreases when excavation is stopped. , The cycle was repeated. For this reason, the operating efficiency of the primary processing equipment was not good.

In the case of using the present invention, the diverting pipe 5
4. The wastewater is transported from the supernatant discharge pipe 56, and the wastewater is transported from the solid discharge pipe 57 when excavation is stopped. As described above, the diversion ratio in the diversion device 10 is adjusted so that the amount of muddy water from the diversion pipe 54 and the supernatant discharge pipe 56 and the amount of muddy water from the solids discharge pipe 57 become the same. I have.

Therefore, as shown in FIG. 5, according to the present invention, the primary processing amount can be leveled, and the primary processing equipment can be operated efficiently.

Further, the flow dividing device 10 is controlled by using the control device 78.
By controlling the diverting ratio and the opening and closing of the control valves 40 to 45, the transport amount of the primary treatment target soil can be appropriately adjusted. Can be reduced.

(Modifications) The application of the present invention is not limited to the above-described embodiment, but can be applied to various modifications.

For example, in the above example, the storage tank 30
Although only one is used, a plurality of storage tanks 30 may be used. In this case, it is preferable to use a plurality of small tanks rather than one large tank. This is because a small tank has a smaller required cross-sectional area occupying the tunnel diameter and is less likely to hinder the transportation of the segment.

Further, in the above-described example, the number of the branch channels is two. However, the branch channel may be divided into three or more branch channels, or the wastewater may be stored in the two or more branch channels. Further, the storage tanks 30 may be provided in all the branch channels. In this case, in order to equalize the transport load and the processing load, each storage tank 3
It is preferable to shift the storage timing at zero.

The distribution channel is not always necessary, and the storage tank 30 is provided in the drainage pipe 52 to temporarily store the primary processing target soil, thereby leveling the transport volume of the primary processing target soil. Can be.

When excavating sandy soil instead of excavating clayey soil, instead of the cutter head 22 having the preceding bits 90, 92 and the trailing bit 94, a cutter head having a normal cutter bit is used. May be applied.

Further, in order to adjust the specific gravity of the wastewater in the storage tank 30, a chemical such as a flocculant or a dispersant may be added to the wastewater in the storage tank 30.

Further, in the above-described example, the case where the muddy shield excavation is performed has been described. However, the present invention can be effectively applied to the case where the muddy pressure shield excavation or the deep excavation is performed.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a muddy water transport system according to an example of the present embodiment.

FIG. 2 is a schematic diagram of a flow dividing device according to an example of the present embodiment, and FIG. 2A is a diagram of the flow dividing device as viewed from the front;
FIG. 2B is a diagram of the flow dividing device as viewed from the side.

FIG. 3 is a front view of a cutter head according to an example of the present embodiment.

FIG. 4 is a schematic plan view showing an excavation state of the ground due to advance and retreat of a preceding bit and a following bit, wherein FIG. 4 (A) is before excavation, FIG. (C) is a figure which shows the excavation state of the ground after trailing excavation.

FIG. 5 is a schematic diagram showing a change in a primary processing amount over time after the start of excavation.

[Explanation of symbols]

 10 Flow divider 22 Cutter head 30 Storage tank 32 Resistance plate 34 Screw conveyor 76 Specific gravity difference measuring device 78 Control device

 ──────────────────────────────────────────────────続 き Continuing from the front page (71) Applicant 593153532 New Sewerage Technology Promotion Organization 1-22-2-8 Nishiikebukuro, Toshima-ku, Tokyo (72) Inventor Sakushi Tabata 1-7-1, Kyobashi, Chuo-ku, Tokyo No. Toda Construction Co., Ltd. (72) Inventor Masayoshi Yasumoto 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Kounosuke Nakamura 1-7-1 Kyobashi, Chuo-ku, Tokyo No. Toda Ken Construction Co., Ltd. (72) Inventor Yoshio Iwai 1-7-1, Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Yoshiharu Shimizu 1-7-1, Kyobashi, Chuo-ku, Tokyo Toda (72) Inventor Taizo Nakamura 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction (72) Inventor Akio Uraya 3-9-13-1 Hazawa, Nerima-ku, Tokyo Inside San-A Industry Co., Ltd. (72) Masaru Yasukochi 3-9-1, Hazawa, Nerima-ku, Tokyo Inside San-A Industry Co., Ltd. (72) Shigeo Fujii 2-2-1 Otemachi, Chiyoda-ku, Tokyo Ishi Headquarters of Kawashima Harima Heavy Industries, Ltd. (72) Inventor Yuji Sakuma 11-1, Kitahama-cho, Chita City, Aichi Prefecture

Claims (13)

[Claims] 1. A muddy water transport system for transporting muddy water generated during excavation from a face to a primary treatment facility through a muddy water transport path, wherein the primary treatment target soil contained in the wastewater in the muddy water transport path is provided. A muddy water transport system characterized by including a storage means for temporarily storing water. 2. The muddy water transport path according to claim 1, wherein the drainage water is diverted in the muddy water transport path to a plurality of branch channels that are a part of the muddy water transport path, and the diverted wastewater is merged into the muddy water transport path. And a storage means, wherein the storage means includes at least one of the plurality of flow paths.
A muddy water transport system characterized by temporarily storing primary treatment soil contained in muddy water in two branch channels. 3. The storage device according to claim 1, further comprising a control unit that sends the primary treatment target soil stored in the storage unit to a muddy water transport path downstream of the storage unit at a predetermined timing. Characterized by a muddy water transport system. 4. The muddy water transport system according to claim 3, wherein the control means transfers the stored primary processing target soil and the non-stored primary processing target soil by opening and closing a flow path opening / closing means provided in the branch flow path. A muddy water transport system characterized by selectively joining a road. 5. The method according to claim 3, wherein the plurality of branch channels are not provided with the storage means, and at least one of the plurality of branch channels directly merges with the muddy water transport path. A diversion channel; and at least one diversion channel for storage provided with the storage means, wherein the diversion means has a flow rate of the muddy water to the direct diversion channel, and a flow rate of the drainage to the storage diversion channel. A muddy water transport system comprising: a diversion ratio determining means controlled by the control means so that a flow rate of the muddy water has a predetermined ratio. 6. The flow rate measuring device according to claim 5, further comprising a flow rate measuring means for measuring a flow rate of the waste water in at least one of the muddy water transportation path and the branch flow path, wherein the control means measures the flow rate measured by the flow rate measuring means. A muddy water transport system, wherein at least one of the split ratio determining means and the flow path opening / closing means is controlled based on a flow rate of the muddy water. 7. The sludge water according to claim 3, wherein the sludge water is generated along with the excavation of the shield excavator, and the control unit controls a timing of stopping the excavation of the shield excavator. A muddy water transport system, wherein the primary treatment target soil stored in the storage means is joined to the muddy water transport path based on the above. 8. The shield machine according to claim 7, wherein the shield machine comprises: a plurality of preceding bits forming a plurality of preceding excavation grooves in the ground; and a ground excavated between the preceding excavation grooves formed by the preceding bits. A muddy water transport system, comprising: at least one trailing bit that cuts and excavates a mountain convex portion in a solid state, and wherein the storage unit stores the cut and excavated solid content. 9. A muddy water transport method for transporting muddy water generated along with excavation from a face to a primary treatment facility via a muddy water transport path, wherein the primary treatment target contained in the drainage water in the muddy water transport path Temporarily storing the soil, and transporting the untreated primary soil through the mud transport path to the primary treatment facility, based on a predetermined timing, temporarily transporting the unstored mud water. A method for transporting the stored soil to the primary treatment facility, the method comprising: stopping the primary treatment, and sending the stored primary treatment target soil to the primary treatment facility. 10. The method according to claim 9, further comprising a flow rate measuring step of measuring a flow rate of the waste water in the muddy water transport path, wherein the storing step is performed based on the measured flow rate of the waste water. A method for transporting muddy water, comprising the step of adjusting the amount of stored water. 11. The flow rate measurement step according to claim 10, wherein the flow rate measurement step includes a step of measuring a storage amount of the wastewater in the storage step, and in the storage soil transport step, the storage amount becomes a predetermined amount. In this case, a method of transporting muddy water, wherein the stored primary treatment soil is sent out to the primary treatment facility. 12. The sludge wastewater according to claim 9, wherein the sludgewater is wastewater generated in a digging step of a shield digging machine, and in the storage soil transporting step, the digging stop of the shield digging machine is stopped. A method for transporting muddy water, comprising sending the stored primary treatment target soil to the primary treatment facility based on a timing. 13. The excavating step of the shield excavator according to claim 12, wherein: a step of forming a plurality of preceding excavation grooves in the ground; A method of transporting muddy water, wherein the step of storing includes storing the solid content cut and excavated in the storage step.