JP5049662B2 - Method and system for producing fluidized soil - Google Patents

Description

  The present invention relates to a method and a system for producing fluidized soil, and more particularly, to a method and a system for producing fluidized soil used for various constructions such as backfilling work such as shield tunnels and joint grooves.

  The fluidized soil is, for example, a stabilized soil produced by stirring and mixing mud water and a solidified material such as cement, and (1) has high fluidity and does not require compaction. (2) Fluidity and strength can be set arbitrarily. (3) Low water permeability and high adhesiveness make it difficult to be eroded by groundwater. (4) Recycling of construction soil is possible. (5) After placing Since it has excellent properties such as small volume shrinkage and compression, it is used in various constructions such as shield tunnels, common trenches and other backfilling works.

  When fluidized soil having the above characteristics is used, for example, for backfilling a shield tunnel, a tank is installed on the ground part of the peripheral edge of the shaft opening, and the fluidized soil is placed in the tank. It is stored and fluidized soil is transported from the tank to the placement position in the shield tunnel by a pump.

  However, when the fluidized soil is transported to the placement position by a pump, the fluidized soil is easily solidified because it contains (A) cement. (B) When the specific gravity is heavy (1.3 or more) In order to obtain a desired property, it is easy to precipitate, (C) the material is separated and the property is easily changed, and (D) the retention time of fluidization is short. The present situation is that it can only cope with transportation of less than 2 km and cannot carry long distance transportation of 2 km or more.

  On the other hand, Patent Document 1 manufactures fluidized soil by transporting muddy water and cement-based solidified liquid using separate piping and mixing the muddy water and cement-based solidified liquid at the placement position. A manufacturing method configured as described above is disclosed.

In such a fluidized soil manufacturing method, the muddy water and the cement-based solidified liquid are transported to the placement position using separate piping, so the above (A) to (D) There is no need to consider the properties of the fluidized soil, and it can sufficiently handle long-distance transportation of 2 km or more.
JP 2001-193390 A

  However, in order to carry a long distance of 2 km or more by the method as described above, a pump for transporting muddy water and cement-based solidified liquid to the site needs to have a large power, resulting in high equipment costs. Moreover, since it takes a long time for long-distance transportation of 2 km or more, the properties of the muddy water and the cement-based solidified liquid may change in the pipe, making it difficult to produce fluidized soil with desired properties.

  The present invention has been made in view of the above-described conventional problems, and provides a fluidized soil manufacturing method and system capable of transporting a material over a long distance without increasing the equipment cost. The purpose is to do.

In order to solve the above problems, the present invention employs the following means.
That is, the present invention is a method for producing fluidized soil by stirring and mixing mud water and a solidifying material such as cement, and a plurality of relays from the predetermined base point to the placement position of the fluidized soil. A mud feeding system that transports while relaying points, and a solidifying material transport means that is different from the mud feeding system that transports a solidified material such as cement to the placement position , and relays to each of the plurality of relay points. In addition to providing a tank, each relay tank and a mud pipe connected to the upstream side thereof are connected via a vacuum suction pipe, a vacuum pump is provided in the middle of each vacuum suction pipe, and the placement by the mud feed system a solidifying material was transported to the punching established position position to transport the the mud by the solidifying material transport means, as well as produce a fluidized treated soil by mixing stirred by installing the stirring and mixing apparatus in the punching installation position, wherein mud When pause of transport, by actuating the respective vacuum pumps, characterized in that discharging the mud of each Okudoro pipe to the respective relay tank.

According to the manufacturing method of fluidizing treated soil of the present invention, the solidifying material, such as mud and cement are transported to a pouring position of the fluidizing treated soil by a separate system, solidified mud by stirring and mixing apparatus in pouring position The material is agitated and mixed to produce fluidized soil with desired properties. In this case, muddy water is transported to the placement position of the fluidized soil while relaying a plurality of relay points by the mud transmission system, so even if the distance from the base point to the placement position is a long distance It can be transported to the placement position without changing the properties of the muddy water.
Further, the operation of the vacuum pump can prevent mud water from remaining and settling in each mud pipe.

The present invention also relates to a method for producing fluidized soil by stirring and mixing mud water and a solidifying material such as cement, and a plurality of relays from a predetermined base point to a placement position of the fluidized soil. A mud feeding system that transports while relaying points, and a solidifying material transport means that is different from the mud feeding system that transports a solidifying material such as cement to the placement position, and the mud feeding system is provided at the base point. A muddy water tank installed therein and storing muddy water therein, a relay tank installed at each of the plurality of relay points, between the muddy water tank and the uppermost relay tank, between adjacent relay tanks, Each of the relay tanks and the relay tank, and a slurry pump provided in the middle of each of the mud pipes. The mud pipe connected to the upstream side And thereby connected to each other via the vacuum suction tube, a vacuum pump provided in the middle of the vacuum suction tube, by actuating the respective slurry pump, transporting mud until the punching installation position through the feed mud pipe and, a solidifying material was transported to the punching installation position by the muddy water and the solidifying material transport means, to produce a fluidized treated soil by mixing and stirring by the stirring and mixing apparatus, when pause transportation of the mud Is characterized in that the muddy water in each mud pipe is discharged to each relay tank by operating each vacuum pump .

According to the manufacturing method of fluidizing treated soil of the present invention, the solidifying material, such as mud and cement are transported to a pouring position of the fluidizing treated soil by a separate system, solidified mud by stirring and mixing apparatus in pouring position The material is agitated and mixed to produce fluidized soil with desired properties. In this case, muddy water is transported to the placement position of the fluidized soil while relaying a plurality of relay points by the mud transmission system, so even if the distance from the base point to the placement position is a long distance It can be transported to the placement position without changing the properties of the muddy water.
Also, the muddy water in the muddy water tank is driven from the muddy water tank to the pouring position of the fluidized soil by sequentially relaying a plurality of relay tanks from the upstream side to the downstream side by the operation of each slurry pump. To the stirring and mixing apparatus.
Further, the operation of the vacuum pump can prevent mud water from remaining and settling in each mud pipe.

In the present invention , each relay tank may be provided with detection means for detecting the level of muddy water in each relay tank, and the operation of the slurry pump may be controlled by a detection signal from the detection means.

According to the fluidized soil manufacturing method of the present invention , the operation of each slurry pump is controlled by the detection signal detected by the detection means . For example, when the detection means detects the lower limit of the muddy water level, the operation of the slurry pump is started by the detection signal, and the muddy water is transported from the muddy water tank or the upstream relay tank to the downstream relay tank . When the detection means detects the upper limit of the muddy water level, the operation of the slurry pump is stopped by the detection signal, and the transportation of muddy water from the muddy water tank or the upstream intermediate tank to the downstream relay tank is stopped. Become.

Furthermore, the present invention is a method for producing a fluidized soil by stirring and mixing mud water and a solidifying material such as cement, and a plurality of relays from the predetermined base point to the placement position of the fluidized soil A mud feeding system for transporting while relaying points; a solidifying material transporting means different from the mud feeding system for transporting a solidifying material such as cement to the placement position; and the muddy water from the placement position. A return system for returning to a midway position of the mud feeding system while relaying a relay point, and mud water transported to the casting position by the mud feeding system and the solidified material transported to the casting position by the solidifying material transporting means. preparative, with the production of fluidized treated soil by mixing stirred by installing the stirring and mixing apparatus in the punching installation position, after completion of the pouring of the fluidizing treated soil, together with the Okudoro line and the return line The mud Wherein the circulating.

According to the manufacturing method of fluidizing treated soil of the present invention, the solidifying material, such as mud and cement are transported to a pouring position of the fluidizing treated soil by a separate system, solidified mud by stirring and mixing apparatus in pouring position The material is agitated and mixed to produce fluidized soil with desired properties. In this case, muddy water is transported to the placement position of the fluidized soil while relaying a plurality of relay points by the mud transmission system, so even if the distance from the base point to the placement position is a long distance It can be transported to the placement position without changing the properties of the muddy water.
Further, since the mud is circulated by the cooperation of the mud feeding system and the return system, it is possible to prevent the mud from settling in the mud feeding system and the return system.

Further, the fluidized soil production system of the present invention is a system for producing fluidized soil by stirring and mixing mud water and a solidifying material such as cement, and the fluidized soil from a predetermined base point. A mud feeding system that transports while relaying a plurality of relay points to the casting position, a mud that is installed at the casting position and transported to the casting position by the mud feeding system, and the mud feeding system A stirring and mixing device that stirs and mixes the solidified material transported to the placement position by another solidifying material transporting means, a relay tank provided at each of the plurality of relay points, and connected to each relay tank and its upstream side And a vacuum pump provided in the middle of each vacuum suction pipe .

Further, the fluidized soil production system of the present invention is a system for producing fluidized soil by stirring and mixing mud water and a solidifying material such as cement, and the fluidized soil from a predetermined base point. A mud feeding system that transports while relaying a plurality of relay points to the casting position, a mud that is installed at the casting position and transported to the casting position by the mud feeding system, and the mud feeding system And a stirring and mixing device that stirs and mixes the solidified material transported to the placement position by another solidifying material transporting means , and the mud feeding system is installed at the base point and a muddy water tank in which mud is stored And a relay tank installed at each of the plurality of relay points, between the muddy water tank and the uppermost relay tank, between adjacent relay tanks, and at the most downstream relay tank and the placement position. Installed mixing equipment And Okudoro tube connected between, and a slurry pump provided in the middle of the feed mud tubes, wherein the respective relay tank and the Okudoro pipe connected at its upstream side, the vacuum suction tube And a vacuum pump is provided in the middle of each vacuum suction tube .

As described above, according to the method and system for producing a fluidized soil according to the present invention, muddy water and a solidified material such as cement are transported from a base point to a placement position by another system, and stirred and mixed at the placement position. Since the fluidized soil with the desired properties is produced by stirring and mixing the muddy water and the solidified material with the equipment, the fluidized soil is transported as it is to the placement position. The fluidized soil having the desired properties can be manufactured and placed at the placement position.
Moreover, since the muddy water is transported to the placement position through a plurality of relay points, it can be transported without changing the properties of the muddy water even if the distance to the placement position is 2 km or longer. It will be possible.
In addition, after the completion of the placement of the fluidized soil, the mud water in each mud pipe is discharged into the relay tank on the downstream side by vacuuming each mud pipe with a vacuum pump. The muddy water does not settle inside each mud pipe before the placement work, and the fluidized soil is continuously manufactured without requiring maintenance such as cleaning inside each mud pipe. Can do.
Furthermore, after the completion of the placement of the fluidized soil, the mud can be circulated through the cooperation of the mud supply system and the return system. The fluidized soil can be continuously manufactured without requiring maintenance such as cleaning of the mud feeding system and the return system.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic view of a fluidized soil production system according to the present invention. This fluidized soil production system is effective for the production of fluidized soil used in various constructions such as shield tunnels, backfilling work such as joint grooves, etc. In this embodiment, It is applied to the production of fluidized soil used for backfilling of shield tunnel 1.

  That is, the fluidized soil production system of the present embodiment is applied to the fluidized soil used for the construction of the road bed of the shield tunnel 1, and the fluidized soil production system is used. By placing the produced fluidized soil on the bottom 1 a of the shield tunnel 1, a road bed can be constructed on the bottom 1 a of the shield tunnel 1.

  The fluidized soil is fluidized by, for example, stirring and mixing mud water and a solidifying material such as cement. In the present embodiment, a commercially available product is used for the mud water 40, and the solidifying material 45 is used. The mud 40 is transported to the placement position 4 of the fluidized soil in the shield tunnel 1 by the mud feeding system 10 and the solidified material 45 is transported to the solidified material transporting means (for example, cement) different from the mud 40. A transport vehicle such as a lorry vehicle) is transported to the placement position 4 of the fluidized soil in the shield tunnel 1, and the muddy water 40 and the solidified material 45 are stirred and mixed using the stirring and mixing device 30 at the placement position 4. Thus, fluidized soil with desired properties is produced.

 The muddy water 40 is not limited to a commercially available product, and the muddy water 40 that has been fluidized by mixing the local soil and water is used by using the local soil obtained by excavating the ground with the shield machine 35. You may do it.

  A mud feed system 10 that transports the mud 40 to the placement position 4 of the shield tunnel 1 includes a mud tank 11 provided on the ground portion 3 at the peripheral edge of the opening of the shaft 2, which is the base point, and the mud tank 11 and the shield tunnel 1. A relay tank 14 provided at each of a plurality of relay points 13 spaced from the installation position 4, between the muddy water tank 11 and the uppermost relay tank 14, between adjacent relay tanks 14, and A mud feed pipe 16 for connecting between the most downstream relay tank 14 and the stirring and mixing device 30 installed at the placement position 4, and a slurry feed slurry pump 17 provided in the middle of each mud feed pipe 16. A vacuum suction pipe 18 connecting between each of the mud pipes 16 (excluding the mud pipe 16 connected to the mud tank 11) and the downstream relay tank 14, and provided in the middle of each vacuum suction pipe 18 Vacuum port And a-flops 19.

  The muddy water tank 11 is a sealed tank capable of storing a predetermined amount of muddy water 40 fluidized inside, and in this embodiment, two muddy water tanks are provided on the ground portion 3 of the opening peripheral edge of the shaft 2. 11 and 11 are provided in series, and both the muddy water tanks 11 and 11 are connected to each other by a connecting pipe 12.

  The relay tank 14 is a sealed tank capable of storing a predetermined amount of muddy water 40 therein, and in the present embodiment, eight relay points 13 are provided in the shield tunnel 1 and relayed to each relay point 13. A tank 14 is provided, and the muddy water 40 in the muddy water tank 11 is transported to the placement position 4 of the shield tunnel 1 through the eight relay tanks 14.

  Stirring means 15 including a stirrer or the like is provided inside each relay tank 14, and the stirrer 15 agitates the interior of each relay tank 14 to prevent sedimentation of the muddy water 40 stored in each relay tank 14. is doing.

  Each relay tank 14 is provided with detection means (not shown) including an ultrasonic meter or the like for detecting the water level of the muddy water 40 stored in each relay tank 14, and according to a detection signal from the detection means. The operation of the slurry pump 17 for each mud is controlled.

  That is, when the detection means detects that the level of the muddy water 40 in the relay tank 14 has reached the predetermined lower limit water level, the operation of the slurry pump 17 for mud feeding immediately upstream of the relay tank 14 is performed by the detection signal. Be started. As a result, when the muddy water level in each relay tank 14 falls to the lower limit water level, the muddy water 40 is supplied from the upstream relay tank 14 (the muddy water tank 11 in the case of the most upstream relay tank 14) via the mud pipe 16. Is done.

  On the other hand, when the detection means detects that the level of the muddy water 40 in the relay tank 14 has reached the predetermined upper limit water level, the operation of the slurry pump 17 for mud feeding immediately upstream of the relay tank 14 is performed by the detection signal. Stopped. As a result, when the muddy water level in each relay tank 14 rises to the upper limit water level, the muddy water 40 from the upstream relay tank 14 (the muddy water tank 11 in the case of the uppermost relay tank 14) through the mud pipe 16 is removed. Supply is stopped.

  In this way, by controlling the operation of the slurry pump 17 for each mud feed according to the detection signal from the detection means of each relay tank 14, the water level of the muddy water 40 in each relay tank 14 is set to the lower limit water level and the upper limit water level. The muddy water 40 in the muddy water tank 11 is sequentially relayed from the upstream side to the downstream side through the plurality of relay tanks 14 and transported to the placement position 4, and the stirring and mixing installed at the placement position 4. Supplied to the device 30.

  Each vacuum suction pipe 18 is provided with an opening / closing valve 20 on the upstream side of the vacuum pump 19. By operating each vacuum pump 19 with each opening / closing valve 20 opened, The muddy water 40 is vacuumed and discharged into the relay tank 14 on the downstream side.

  In this case, the upper limit water level of the mud water 40 in each relay tank 14 is set to a value obtained by subtracting the amount of the mud water 40 in each mud pipe 16 from the upper limit water level of each relay tank 14. All the muddy water 40 can be discharged into the relay tank 14 on the downstream side.

  In addition, when it is not necessary to transport muddy water such as when the driving operation is stopped, the muddy water 40 in each mud pipe 16 is vacuumed by each vacuum pump 19 and discharged into the relay tank 14 on the downstream side. The mud water 40 can be prevented from remaining in each mud pipe 16, thereby preventing the mud water 40 from sinking in each mud pipe 16.

  The solidified material transport means (not shown) is a transport vehicle such as a cement lorry vehicle that can travel in the shield tunnel 1, and transports the solidified material 45 to the placement position 4 in the shield tunnel 1 by this transport vehicle. Then, it is supplied to a cement silo (not shown) installed at the placement position 4 and supplied to the stirring and mixing device 30 via the cement silo.

  The solidifying material transporting means is not limited to the one having the above-described configuration, and a granular material transporting pipe (not shown) is laid between the shield tunnel 1 and the ground part 3, and the air pressure of a compressor, blower, or the like. You may make it convey to the placement position 4 via this granular material transport pipe | tube by a sending means.

  According to the present embodiment, as described above, the operation of the slurry pump 17 for each mud feed is controlled by the detection signal from the detection means of each relay tank 14 of the mud feed system 10 and stored in the mud tank 11. The muddy water 40 is sequentially relayed from the upstream side to the downstream side through the plurality of relay tanks 14, transported to the placement position 4 of the shield tunnel 1, and supplied to the stirring and mixing device 30 installed at the placement position 4. Further, in parallel with the transport of the muddy water 40, the solidified material 45 is transported to the placement position 4 by the solidified material transportation means and supplied to the stirring and mixing device 40 via the cement silo at the placement position 4.

  Then, by operating the agitation and mixing device 40 to agitate and mix the muddy water 40 and the solidified material 45, fluidized treated soil having a desired property is produced, and the fluidized treated soil is placed in a placement device (not shown). The road bed slab can be constructed on the bottom portion 1a of the shield tunnel 1 by placing it on the bottom portion 1a of the shield tunnel 1.

  In addition, after the operation of placing the fluidized soil is completed, the vacuum pumps 19 are operated to vacuum-suck the mud pipes 16, and the mud water 40 in the mud pipes 16 is transferred to the downstream relay tank 14. By discharging the inside, all the muddy water 40 remaining in each mud pipe 16 is removed, and the next fluidization treatment soil is placed.

  In the fluidized soil manufacturing system according to the present embodiment configured as described above, the muddy water 40 and the solidifying material 45 are separated from each other up to the placement position 4 of the shield tunnel 1 (the mud feeding system 10 and the solidifying material). Transported by a transport means (for example, a transport vehicle such as a cement lorry vehicle), and the fluidized soil is produced by stirring and mixing the muddy water 40 and the solidified material 45 at the placement position 4. The property of the fluidized soil does not change as in the case where the treated soil is transported to the placement position 4 as it is, and the fluidized treated soil having a desired property is manufactured and placed at the placement position 4. Can be set.

  In addition, since the muddy water 40 is transported from the muddy water tank 11 to the placement position 4 through the relay tanks 14, even if the distance to the placement position 4 is a long distance of 2 km or more, the properties of the muddy water 40. It can be transported without changing.

  Further, after completion of the operation of placing the fluidized soil, the mud pipes 16 are vacuum sucked by the vacuum pumps 19 to discharge the mud water 40 in the mud pipes 16 into the relay tank 14 on the downstream side. As a result, the mud 40 does not settle inside each mud pipe 16 until the next placement work, and it does not require maintenance such as cleaning in each mud pipe 16. It is possible to continuously produce the chlorinated soil.

  In the above description, two muddy water tanks 11, eight relay tanks 14, nine slurry pumps 17, and seven vacuum pumps are provided between the ground portion 3 and the placement position 4 of the shield tunnel 1. However, these numbers can be set to appropriate numbers depending on the length of the shield tunnel 1 and the properties of the muddy water 40 used.

  FIG. 2 shows another embodiment of the fluidized soil production system according to the present invention. This fluidized soil production system is configured such that the muddy water 40 is placed from the base point 3 and the shield tunnel 1 is placed. In addition to the mud feed system 10 that transports up to 4, a return system 21 that returns the mud 40 from the placement position 4 to the middle of the mud feed system 10 (for example, near the entrance of the shield tunnel 1) is provided. After the installation work is completed, the mud water 40 is circulated in the shield tunnel 1 by the cooperation of the mud feed system 10 and the return system 21. Other configurations are shown in the above embodiment. It is the same.

  In this case, the mud feeding system 10 does not use the relay tank 14 as in the above-described embodiment, but installs only the slurry pump 17 for mud feeding at each relay point 13, and the mud water tank 11 and the most upstream side. The sludge feed pipe 16 connects the sludge feed slurry pump 17, the adjacent sludge feed slurry pumps 17, and the most downstream slurry pump 17 and the stirring and mixing device 30 at the placement position 4. ing. An opening / closing valve 26 a is provided at the outlet of the muddy water tank 11, an opening / closing valve 26 b is provided at the inlet of the stirring and mixing device 30, and an opening / closing valve 26 c is provided at the inlet of the shield tunnel 1.

  Further, the return system 21 is provided with a plurality of relay points 22 in the shield tunnel 1, and only the return slurry pumps 23 are installed at the relay points 22, respectively. Between the slurry pump 23 for return and the part of the mud pipe 16 near the placement position 4 of the shield tunnel 1 (the part of the mud pipe 16 positioned upstream of the opening / closing valve 26b) and the most upstream return The slurry pump 23 is connected to the portion of the mud pipe 16 near the inlet of the shield tunnel 1 (the part of the mud pipe 16 on the downstream side of the on-off valve 26c) by a return pipe 24. In addition, an opening / closing valve 26d and a return pipe 24 near the entrance of the shield tunnel 1 are provided in the middle of the return pipe 24 near the placement position 4 of the shield tunnel 1 (a position upstream of the connection portion with the mud pipe 16). An opening / closing valve 26e is provided in the middle (a position downstream of the connecting portion with the mud pipe 16).

  According to the present embodiment, the sludge feed slurry pumps 17 are operated with all the open / close valves 26d and 26e of the return system 21 closed and all the open / close valves 26a to 26c of the mud feed system 10 opened. By doing so, the muddy water 40 is relayed from the muddy water tank 11 to the placement position 4 of the shield tunnel 1 via the plurality of slurry pumps 17 for feeding mud, and supplied to the stirring and mixing device 30. Further, in parallel with the transport of the muddy water 40, the solidified material 45 is transported to the placement position 4 by the solidified material transporting means and supplied to the stirring and mixing device 30, and the stirring and mixing device 30 is operated to activate the mud water 40 and the solidified material 45. By stirring and mixing, a desired fluidized soil can be produced.

  In addition, after the fluidized soil manufacturing work is completed, all the open / close valves 26a to 26c of the mud feed system 10 are closed, and all the open / close valves 26d and 26e of the return system 21 are opened. In this state, the shield tunnel 1 The mud feed 40 is circulated through the mud pipe 16 and the return pipe 24 by operating the slurry pump 17 and the return slurry pump 23 disposed inside, and the mud water 40 is circulated through the mud pipe. 16 and the return pipe 24 can be prevented from settling.

  Even in the fluidized soil manufacturing system according to the present embodiment configured as described above, the muddy water 40 and the solidified material 45 are disposed up to the placement position 4 of the shield tunnel 1 in the same manner as in the embodiment. Is transported by a separate mud feed system 10 and a solidifying material transporting means, and the fluidized soil is produced by stirring and mixing the mud 40 and the solidifying material 45 at the placement position 4. The property of the fluidized soil does not change as in the case where the treated soil is transported to the placing position 4 as it is, and the fluidized treated soil having a desired property is manufactured and placed in the placing position 4. Can be set.

  In addition, since the muddy water 40 is transported from the muddy water tank 11 to the placement position 4 through a plurality of slurry pumps 17 for sending mud, even if the distance to the placement position 4 is a long distance of 2 km or more. It can be transported without changing the properties of the muddy water 40.

  Further, since the muddy water 40 is circulated by the cooperation of the mud feed system 10 and the return system 21 after the fluidization soil is placed, the muddy water 40 is sent to the mud before the next placement work. The fluidized soil is continuously manufactured without requiring sedimentation inside the pipe 16 and the return pipe 24, and without requiring maintenance such as cleaning of the mud pipe 16 and the return pipe 24. Can do.

  In the above description, the case where the fluidized soil production system according to the present invention is applied to the production of fluidized soil used for the road bed of the shield tunnel 1 has been described. Of course, the present invention may be applied to various other construction sites that use the chlorinated soil, and in that case, the same effects can be obtained.

It is the schematic which showed one Embodiment of the manufacturing system of the fluidization processing soil by this invention. It is the schematic which showed other embodiment of the manufacturing system of the fluidization processing soil by this invention.

Explanation of symbols

1 Shield tunnel 1a Bottom 2 Vertical shaft 3 Base point (ground part)
4 Casting Position 10 Mud Feeding System 11 Mud Tank 12 Connecting Pipe 13 Relay Point 14 Relay Tank 15 Agitation Means 16 Mud Feeding Pipe 17 Mud Feed Slurry Pump 18 Vacuum Suction Pipe 19 Vacuum Pump 20 Opening Valve 21 Return System 22 Relay Point 23 Slurry pump for return 24 Return pipes 26a to 26e Open / close valve 30 Stirrer / mixer 35 Shield machine 40 Mud water 45 Solidified material

Claims (6)

A method for producing fluidized soil by stirring and mixing muddy water and a solidifying material such as cement,
Separate from the mud feeding system that transports muddy water from a predetermined base point to the placement position of the fluidized soil while relaying a plurality of relay points, and the mud feeding system that transports a solidified material such as cement to the placement position. Solidifying material transport means,
A relay tank is provided at each of the plurality of relay points, each relay tank and a mud pipe connected to the upstream side thereof are connected via a vacuum suction pipe, and a vacuum pump is provided in the middle of each vacuum suction pipe ,
Fluidization by stirring and mixing the muddy water transported to the casting position by the mud feeding system and the solidified material transported to the casting position by the solidifying material transporting means by a stirring and mixing device installed at the casting position. While manufacturing the treated soil,
When stopping the transportation of the muddy water, the fluidized soil is produced by draining the muddy water in the mud pipes to the relay tanks by operating the vacuum pumps . A method for producing fluidized soil by stirring and mixing muddy water and a solidifying material such as cement,
Separate from the mud feeding system that transports muddy water from a predetermined base point to the placement position of the fluidized soil while relaying a plurality of relay points, and the mud feeding system that transports a solidified material such as cement to the placement position. Solidifying material transport means,
The mud supply system is installed at the base point, a muddy water tank in which muddy water is stored, a relay tank installed at each of the plurality of relay points, and between the muddy water tank and the most upstream relay tank. A mud pipe connecting each of the adjoining relay tanks and between the most downstream relay tank and the stirring and mixing device installed at the placement position; and a slurry pump provided in the middle of each mud pipe With
Each of the relay tanks and the mud pipe connected to the upstream side thereof are connected via a vacuum suction pipe, and a vacuum pump is provided in the middle of each vacuum suction pipe,
By operating each of the slurry pumps, the muddy water is transported to the placement position through the mud pipe, and the solidified material transported to the placement position by the solidifying material transporting means is stirred. Producing fluidized soil by stirring and mixing with a mixing device ,
When stopping the transportation of the muddy water, the fluidized soil is produced by draining the muddy water in the mud pipes to the relay tanks by operating the vacuum pumps .   The said relay tank is provided with the detection means which detects the water level of the muddy water in each relay tank, The operation | movement of the said slurry pump is controlled by the detection signal of this detection means. A method for producing fluidized soil. A method for producing fluidized soil by stirring and mixing muddy water and a solidifying material such as cement,
Separate from the mud feeding system that transports muddy water from a predetermined base point to the placement position of the fluidized soil while relaying a plurality of relay points, and the mud feeding system that transports a solidified material such as cement to the placement position. A solidifying material transporting means, and a return system for returning the muddy water from the placement position to the midway position of the mud feeding system while relaying the plurality of relay points,
Fluidization by stirring and mixing the muddy water transported to the casting position by the mud feeding system and the solidified material transported to the casting position by the solidifying material transporting means by a stirring and mixing device installed at the casting position. with the production of treated soil,
A method for producing fluidized soil , wherein the mud water is circulated in cooperation with the mud feed system and the return system after the placement of the fluidized soil is completed . A system for producing fluidized soil by stirring and mixing mud and solidified material such as cement,
A mud feed system that transports mud water while relaying a plurality of relay points from a predetermined base point to a placement position of fluidized soil;
The mud water installed at the casting position and transported to the casting position by the mud feeding system and the solidified material transported to the casting position by a solidifying material transport means different from the mud feeding system are stirred. A mixing device for mixing;
A relay tank provided at each of the plurality of relay points ;
A vacuum suction pipe connecting each relay tank and a mud pipe connected to the upstream side thereof;
A fluidized soil production system comprising: a vacuum pump provided in the middle of each vacuum suction pipe . A system for producing fluidized soil by stirring and mixing mud and solidified material such as cement,
A mud feed system that transports mud water while relaying a plurality of relay points from a predetermined base point to a placement position of fluidized soil;
The mud water installed at the casting position and transported to the casting position by the mud feeding system and the solidified material transported to the casting position by a solidifying material transport means different from the mud feeding system are stirred. A stirring and mixing device for mixing,
The mud supply system is installed at the base point, a muddy water tank in which muddy water is stored, a relay tank installed at each of the plurality of relay points, and between the muddy water tank and the most upstream relay tank. A mud pipe connecting each of the adjoining relay tanks and between the most downstream relay tank and the stirring and mixing device installed at the placement position; and a slurry pump provided in the middle of each mud pipe With
A fluidizing process characterized in that each of the relay tanks and the mud pipe connected to the upstream side thereof are connected via a vacuum suction pipe, and a vacuum pump is provided in the middle of each vacuum suction pipe. Soil manufacturing system.

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