JP3605709B2 - Method and apparatus for producing fluidized soil - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a method for producing a fluidized soil obtained by mixing muddy water and a solidifying material among fluidized soils.
[0002]
[Prior art]
In the construction and civil engineering work, conventionally, a large amount of soil generated by excavation at the construction site is mixed with cement or other solidifying material and used as fluidized soil to reduce the cost of remaining soil treatment and to effectively use resources. We are trying to use it. FIG. 6 shows an example of a conventional manufacturing procedure for producing such fluidized soil.
[0003]
At the construction site, a muddy water production section 60, a mixing section 61, and a storage agitator section 62 are provided as production apparatuses. Of these, the muddy water production section 60 and the mixing section 61 are operated in a batch system. That is, the muddy water production unit 60 produces muddy water that is quantitatively charged into the tank and that is quality-controlled (managed by a density test). In terms of procedure, after soil and water are put into the tank in an amount corresponding to one batch, the soil is demudged by a special mixing means, and impurities such as rocks are discharged (classification processing). Adjust the quality to the design quality. The mixing unit 61 is a fluidized material that is quantitatively charged into the tank with muddy water and cement or other powdery solidified material produced by the muddy water manufacturing unit 60 and quality controlled (managed by a density test and a flow test). Manufacture treated soil. In terms of procedure, after the adjusted muddy water and the powdered solidified material are put into the tank in an amount corresponding to one batch, they are kneaded by a dedicated mixing means so as to have the design quality. The agitator section 62 is a place for storing a mortar material in a fluidized state (hereinafter, referred to as fluidized soil) produced for each batch in the mixing section 61, and a mixing means for the agitator provided in the tank. To keep the fluidized soil from separating. The fluidized soil is loaded from the temporarily stocked agitator section 62 into an agitator truck and transported to the construction area, or is pumped into the construction area via a pump and a supply pipe to be driven.
[0004]
[Problems to be solved by the invention]
In the above-mentioned conventional method, the following problems arise in terms of the manufacturing method and apparatus.
First, in this type of production, when the amount of generated soil to be treated is large, such as in urban development, a plurality of muddy water production units 60 and mixing treatment units 61 are provided, and the storage agitator unit 62 is also proportional to it. Size. For this reason, in the conventional method, the equipment cost of the apparatus is large, and the basic price of the product is naturally high. For example, the application itself may be difficult in terms of cost.
Secondly, it is preferable from the viewpoint of transportation cost and quality maintenance that the installation area of the manufacturing equipment and the installation area where the product is used are located as close to the construction site as possible. However, in the conventional method, the muddy water production section 60, the mixing processing section 61, and the storage agitator section 62 are indispensable. For example, if it is necessary to secure a production facility for 500 m3 / day of fluidized soil, It requires at least about 1000 m 2 as the installation area of the apparatus, and there are restrictions on the installation area of the apparatus and the required supply amount cannot be secured.
Third, the fluidized soil is often stocked in the storage agitator section 62, loaded onto the agitator vehicle using a supply pipe and a pressure pump, and transported to the casting section. In such a conventional method, in addition to the time required for loading in the agitator vehicle, separation takes place during the loading process, and the quality tends to change.
[0005]
The present invention has been developed in view of the above background, and its purpose is to greatly simplify a manufacturing apparatus, thereby reducing a basic price of a product and structurally eliminating restrictions on an apparatus installation area. It is an object of the present invention to provide a method for producing a fluidized soil that has been made possible. Other objects will be clarified in the following description.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is devised with the following configuration.
The invention of claim 1 is a fluidization in which muddy water whose density is adjusted in a muddy water producing section and a solidifying material such as cement are mixed to a predetermined quality, and are fed to a carrier with an agitator function or a casting section through a supply pipe. In the method for producing treated soil, the supply pipe is disposed between the muddy water production unit and the transport vehicle or the casting unit side, and a pump that pumps the muddy water of the muddy water production unit, and is pumped by the pump. A flow meter for measuring the amount of muddy water, a continuous kneader connected to the pipe outlet side, and the solidified material on the silo side connected to the pipe on the near side of the kneader, and the input amount of the solidified material by a screw mechanism. Having an introduction section for controlling and supplying the pipe into the pipe, and determining the mixing ratio between the muddy water of the muddy water production section and the solidified material on the silo side in accordance with the density of the fluidized treated soil, based on the mixing ratio. Calculate the required supply amounts of the muddy water and the solidified material A pumping time (t) required for pumping the calculated supply amount of muddy water in the muddy water production unit is predicted, and a discharge time period in which the calculated supply amount of the solidified material is entirely discharged from the introduction unit on the silo side. After setting the screw mechanism so as to be equal to the pumping time (t) of the muddy water, the muddy water of the muddy water production section is pumped through the supply pipe via a pump, and at the same time, the solidified material on the silo side is introduced into the introduction section. From the feeder and into the supply pipe, and discharge to the carrier or the casting section while mixing through the kneader.
[0007]
The invention of claim 2 is a fluidization method in which muddy water whose density is adjusted in a muddy water producing section and a solidifying material such as cement are mixed to a predetermined quality and pressure-fed to a carrier with an agitator function or a casting section through a supply pipe. In the method for producing treated soil, the supply pipe is disposed between the muddy water production unit and the transport vehicle or the casting unit side, and a first pump for pumping the muddy water of the muddy water production unit; A flow meter that measures the amount of muddy water pumped by a pump, a continuous kneader connected to a pipe outlet side, and water added to the solidified material in advance connected to a pipe on the near side of the kneader, An introduction section for supplying the adjusted slurry from the slurry production section to the pipe by controlling the input amount by a second pump, and supplying the slurry into the pipe in accordance with the density of the fluidized treated soil. And the mixing ratio of the slurry in the slurry production section and the Based on the ratio, the respective supply amounts of the muddy water and the slurry, which are the required total amount, are calculated, and the pumping time (t) required for pumping the calculated supply amount of the muddy water in the muddy water production unit is predicted, The second pump is set on the slurry production section so that the discharge time for discharging the calculated supply amount of slurry from the introduction section is the same as the pumping time (t) of the muddy water. Is fed through the supply pipe via the first pump, and at the same time, the slurry in the slurry production section is fed from the introduction section into the supply pipe via the second pump, and the slurry is mixed while passing through the kneader. It is configured to discharge to a car or a casting part.
[0008]
As described above, the present invention operates the muddy water production unit and the mixing processing unit according to the loading amount (product supply amount) on the agitator vehicle as a conventional measure in the case where the installation space of the apparatus is restricted. This was dealt with by reducing the stock volume to some extent, but such measures had limitations in overcrowded construction sites and were completed in the process of considering improvement measures. The required quality of the fluidized soil, which is a product, is controlled by the density and the flow value in normal use, and the control value is also determined according to the purpose of use and the conditions of the casting location.
[0009]
That is, the structure of the present invention is based on the premise that the supply pipe 40 is disposed between the muddy water production unit 10 and the carrier 21 with agitator function or the casting unit side in the example of the drawing. The constituent materials of the muddy water 3 and the cement-based solidifying material (in the invention of claim 1, the solidifying material 4 is used alone or in a state in which gravel and the like are mixed, and in the invention of claim 2, in a slurry state in which the solidifying material 4 is adjusted) The mixture is kneaded using a continuous kneader 44 immediately before being discharged to the transport vehicle 21 or the casting section, and then injected or discharged. For this reason, the present invention requires the muddy water production unit 10 in comparison with the conventional structure. However, the mixing unit and the agitator unit can be omitted, and an ideal production method and apparatus without waste are realized. Specifically, the equipment installation area can be reduced to less than half of the conventional one, the horizontal waiting movement of the material is minimized, the equipment cost and operating cost are reduced, and the separation of the fluidized soil is prevented and the quality is improved. It is planned. The transport vehicle with an agitator function of the present invention includes ordinary agitator trucks and mixer trucks in the sense that it has a function of transporting fluidized soil while treating it so as not to be separated.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. This embodiment is a preferred two specific examples, and various limitations are provided, but do not limit the scope of the present invention. FIGS. 1, 2 and 3 (a) show the configuration of the first embodiment, and FIGS. 4, 5 and 3 (b) show the configuration of the second embodiment.
[0011]
(First Embodiment) In this embodiment, the conventional mixing section and agitator section can be omitted completely. After the muddy water 3 is produced from the soil 1 and the water 2, the cement 3 is solidified into the muddy water 3. The powder of the material 4 or the mixture of the gravel 5 and the like is mixed on the discharge side on the supply line to produce fluidized soil 6 of a predetermined quality. As shown in FIGS. 2 and 3A, the production apparatus mainly includes a muddy water production unit 10 and a supply pipe 40 disposed between the muddy water production unit 10 and the transport unit 20; Pump 41 provided on the suction side of the pump, an integrating flow meter 42 and a control unit 43 incorporated in the supply pipe 40, a static mixer 44 as a kneader incorporated on the discharge side of the supply pipe 40, An introduction section 46 and the like connected to a pipe section in front of the tech mixer 44 are provided.
[0012]
The muddy water production section 10 is a place where the muddy water 4 having a predetermined density is produced by putting a fixed amount of the soil 1 and the water 2 into the tank 11 and performing a process such as mixing. In this embodiment, a bucket mixer 13 mounted on a transporter 12 is used, and soil 1 and water 2 are charged into the tank 11 by an amount corresponding to one batch. In addition to discharging (classifying) contaminants such as rocks, the mixture is uniformly mixed to perform mud conditioning so as to reach the design density. In this case, the water 2 is supplied from the separately installed tank 14 via the pump 15 and the pipe 16, and the amount of water supplied is controlled by the flow meter 17 and the control unit 18. May be used. The tank 11 has a mixing section 19a and a mud pool 19b integrally, and the manufactured mud 3 is transferred from the mixing section 19a to the mud pool 19b and transported via the pump 41 and the supply pipe 40. The next batch operation can be started in the mixing section 19a even while the pressure is being fed to the section 20. This is devised to increase the operation rate of the tank 11, but the tank 11 itself may have at least the mixing section 19a.
[0013]
The supply pipe 40 is located on the suction side in the mud pool 19b, and sends out the mud 3 in the mud pool 19b via the pump 41. The pumping amount of the muddy water 3 is measured by the integrating flow meter 42. The integrating flow meter 42 digitally displays the integrated value and transmits a signal to a control unit 43 that controls the operation of the pump 41. The control unit 43 can set the amount of muddy water supplied from the supply pipe 40 to an arbitrary set value, start the operation of the pump 41, or have the integrated value of the integrating flow meter 43 reach the set value. At times, the operation of the pump 41 is stopped.
[0014]
On the other hand, the transport section 20 is located on the discharge side of the supply pipe 40, and the static mixer 44 is connected. In addition, the transport unit 20 is provided with a silo 25 for supplying the cement-based solidified material 4 at a location where the fluidized soil 6 as a product is loaded on the agitator wheel 21 and a transfer provided corresponding to the discharge unit of the silo 25. A discharger 22 and an aggregate input means 24 for inputting the gravel 5 and the like into the transfer discharger 22 are provided.
[0015]
The static mixer 44 is publicly known as a line mixer, and is assembled with the inlet side fixed downward through a connecting member 45 to a large-diameter portion 40 b provided on the outlet side of the supply pipe 40. The outlet portion of the introduction portion 46 is connected to the inside of the enlarged diameter portion 40b so as to protrude vertically. The introduction portion 46 extends from the transfer / discharge device side with the control portion 23, and introduces the cement 4 (or the cement 4 and the gravel 5 or the like) charged into the transfer / discharge device into the enlarged diameter portion 40b. In this embodiment, the introduction portion 46 constitutes a lower discharge portion of the transfer / discharge device, and includes a so-called screw mechanism that transfers the cement 4 (or the cement 4 and the gravel 5) by a rotating action. The operation of the transfer / discharge device 22 is controlled via a control unit 23. The control unit 23 can set the discharge amount, discharge time, and the like from the introduction unit 46 in addition to the start and stop of the screw mechanism. Therefore, for the cement 4 (or cement 4 and gravel 5 etc.) charged into the transfer / discharge unit, the transfer time according to the input amount is set in the control unit 23 so that the cement 4 is transferred from the introduction unit 46 within the set time. The liquid is discharged into the enlarged diameter portion 40b by a substantially constant amount.
[0016]
Note that the silo 25 may have any structure as long as the cement 4 can be pumped from the lower side and stored, and the required amount can be sent out from the discharge unit. The transfer / discharge device 22 is fixed directly below the discharge portion of the silo 25 using a support member 26 or the like. The aggregate input means 24 is capable of stocking the gravel 5 and the like in the tank 27, transferring the gravel 5 and the like to the transfer / ejector 22 by a belt mechanism, and inputting them in a substantially constant amount. Good.
[0017]
(Example of Manufacturing Using First Embodiment) FIG. 1 shows an example of a manufacturing flow when the above-described manufacturing apparatus is used. This manufacturing example is an example in which only cement is mixed as the solidifying material 4 into the muddy water 3. However, when the solidifying material 4 and the gravel 5 are mixed, this can be performed by analogy. In addition, although the fluidized soil 6 to be manufactured is loaded on the agitator wheel 21 and transported to the casting section, it may be discharged directly to the casting section. Note that the muddy water 3 itself is omitted because it is made in the same manner as in the related art.
[0018]
In the production preparation stage, the mixing ratio of the muddy water 3 and the solidified material 4 is determined in consideration of the muddy water state, etc., so that the required required density and flow value of the fluidized soil 6 are obtained. Further, based on the mixing ratio, the necessary total amount (each supply amount) of the muddy water 3 and the solidified material 4 is calculated according to the amount of loading into the agitator wheel 21. Then, the operator sets the supply amount of the muddy water 3 as an integrated value in the control unit 43 on the muddy water manufacturing unit 10 side, and determines the pumping time (t) of the muddy water 3 until reaching the integrated value by the pump 41 capacity or the like. The prediction is made in consideration of the length of the supply pipe 40 (step 1). Thereafter, on the side of the transport unit 20, the solidified material 4 in the powder state is weighed from the silo 25 into the transfer / ejector by the above-described supply amount, and the discharge time according to the solidified material input amount is sent to the control unit 23. Set (step 2). This setting is such that the solidified material 4 in the transfer / discharge device 22 is completely discharged from the introduction portion 46 in the same time as the predicted time (t) according to the rotation speed of the screw of the transfer / discharge device. It is.
[0019]
When the above preparations are completed, the operator confirms that the agitator wheel 21 is at the home position as shown in FIG. 2, and then starts the operation of the pump 41 via the control unit 43, and at the same time, transfers the pump via the control unit 23. The operation of the ejector is started (steps 3, 4, 5). Then, as shown in FIG. 3A, the muddy water 3 in the muddy water reservoir 19 b reaches the inlet of the static mixer 44 through the supply pipe 40, and the solidified material 4 in the transfer / discharger 22 passes through the inlet 46. In this case, on the introduction part 46 side, the solidified material 4 is discharged into the muddy water 3 that is pumping the enlarged diameter part 40b, and at this time, the solidified material 4 has the distal end of the introduction part 46 facing down into the enlarged diameter part 40b. , And is smoothly mixed into the muddy water 3 by the negative pressure.
[0020]
Then, the muddy water 3 and the solidified material 4 are fed into the static mixer 44 in a mixed state, and are manufactured into the fluidized treated soil 6 of a predetermined quality by the kneading action of the static mixer 44, while the agitator wheel 21 is formed. From the hopper into the tank. In this case, the amount of the discharged muddy water 3 is measured by the integrating flow meter 42, and the integrated value is sequentially transmitted to the control unit 43 (Step 6). The loading is continued until the integrated value of the integrating flow meter 42 matches the set value of the control unit 43 (steps 6 and 8). Automatic stop is performed (step 10). At the same time, the transfer / discharge unit 22 is automatically stopped via the control unit 23 when the discharge time of the solidified material 4 set in the control unit 23 is reached (steps 7, 9, 11). After that, it is shifted to loading to the next agitator vehicle. Therefore, in such a manufacturing method, in addition to the simplification of the apparatus as compared with the conventional method, the installation area of the apparatus can be significantly reduced, and the operation rate of the apparatus can be improved. In addition, since the fluidized soil 6 is loaded on the agitator wheel 21 while being manufactured by the static mixer 44 or discharged to the casting part, the pump 41 and the like required for the manufacturing process are small, and the operating cost can be reduced. .
[0021]
(Second Embodiment) This embodiment is different from the first embodiment in that a slurry 7 is produced by producing muddy water 3 from soil 1 and water 2 and simultaneously adding water 2 to a solidifying material 4 such as cement. The difference is that the muddy water 3 and the slurry 7 are mixed on the discharge side on the supply line to produce fluidized soil 6 of a predetermined quality. As shown in FIGS. 5 and 3 (b), the production apparatus mainly includes a muddy water production unit 10 and a slurry production unit 30, and is disposed between the muddy water production unit 10, the slurry production unit 30, and the transport unit 20. Supply pipes 40, 50, pumps 41, 51 provided on each suction side of the supply pipes 40, 50, integrating flow meters 42, 52 and control units 43, 53 incorporated in the supply pipes 40, 50. , A static mixer 44 as a kneader incorporated on the discharge side of the supply pipes 40 and 50, and an introduction section 48 connected to a pipe section before the static mixer 44. Since the configuration related to the muddy water production unit 10 and its supply pipe 40 is the same as that of the first embodiment, the same or similar members and parts as those of the first embodiment are denoted by the same reference numerals, and redundant description is omitted as much as possible. .
[0022]
The slurry producing section 30 supplies a fixed amount of the cement-based solidifying material 4 and water 2 into the tank 31 to produce the slurry 7 of a predetermined quality through the mixing means 32 and temporarily puts the slurry 7 in the agitator tank 33. It is a place to stock. In this embodiment, the water 2 in the tank 34 and the solidified material 4 stored in the silo 35 are charged into the tank 31 in an amount corresponding to one batch, and then kneaded for a predetermined time by the dedicated mixing means 32. 33. The supply pipe 50 has a suction side located in the tank 33, and sends out the slurry 7 in the tank 33 via the grout pump 51. The pressure of the slurry 7 is measured by the integrating flow meter 52. The integrating flow meter 52 digitally displays the integrated value and transmits a signal to a control unit 53 that controls the operation of the grout pump 51. The control unit 53 can set the supply amount of the slurry 7 sent from the supply pipe 50 to an arbitrary set value, start the operation of the grout pump 51, and adjust the integrated value of the integrating flow meter 53 to the set value. , The operation of the grout pump 51 is stopped.
[0023]
On the other hand, the transport section 20 is located on the discharge side of the supply pipes 40 and 50, and the static mixer 44 is connected. The static mixer 44 is assembled in a state where the inlet side is fixed substantially horizontally or obliquely downward through a connecting member 45 to an enlarged diameter portion 40 b provided on the outlet side of the supply pipe 40. This diameter expansion portion 40b, and is connected in a state where the inlet portion 48 constituting the discharge side of the supply pipe 50 is substantially horizontally fixed to its ends. In FIG. 5 and FIG. 3B, reference numeral 28 denotes a columnar support member for guiding the supply pipes 40 and 50 to the hopper height position of the agitator wheel 21. The static mixer 44 is held on the upper end side of the support member 28. Reference numeral 49 denotes a guide pipe connected to the outlet side of the static mixer 44, which is provided as needed with respect to the hopper position of the agitator wheel 21.
[0024]
(Manufacturing Example Using Second Embodiment) FIG. 4 shows a manufacturing flow when the above-described manufacturing apparatus is used. Note that this manufacturing flow is different from FIG. 1 described above only in the flow on the left slurry manufacturing unit side.
[0025]
In the preparation stage, the mixing ratio of the muddy water 3 and the slurry 7 is determined so that the required required density and the flow value of the fluidized soil 6 are obtained. Further, based on the mixing ratio, the total amount (each supply amount) of the muddy water 3 and the slurry 7 to be mixed according to the amount of loading into the agitator wheel 21 is calculated. Then, on the muddy water production unit 10 side, the supply amount of the muddy water 3 is set as an integrated value in the control unit 43, and the pumping time (t) of the muddy water 3 until reaching the integrated value is predicted (step S1). 1). Further, on the slurry production unit 30 side, the pressure feeding time of the slurry 7 is set in the control unit 53 (step 2). That is, in this setting, the calculated supply amount of the slurry 7 is completely discharged from the introduction section 48 in the same time as the pumping time (t) of the muddy water 3.
[0026]
When the above preparation is completed, the operator confirms that the agitator wheel 21 is at the home position as shown in FIG. 5 and then starts the operation of the pump 41 via the control unit 43, and at the same time grouts via the control unit 53. The operation of the pump 51 is started (steps 3, 4, 5). Then, as shown in FIG. 3B, the muddy water 3 in the muddy water reservoir 19b reaches the inlet of the static mixer 44 through the supply pipe 40, and the slurry 7 in the tank 33 reaches the inlet of the static mixer 44 through the inlet 48. .
[0027]
Then, the muddy water 3 and the slurry 7 are fed into the static mixer 44 in a mixed state, and are produced by the kneading action of the static mixer 44 into the fluidized treated soil 6 of a predetermined quality. It is loaded into the tank from the hopper. In this case, the amount of the discharged muddy water 3 is measured by the integrating flow meter 42, and the integrated value is sequentially transmitted to the control unit 43 (Step 6). This loading is continued until the integrated value of the integrating flow meter 42 matches the set value of the control unit 43, at which time the pump 41 and the integrating flow meter 42 are automatically stopped via the control unit 43 (step 8, 10). At the same time, the amount of the slurry 7 sent out is measured by the integrating flow meter 52, and the integrated value is sequentially transmitted to the control unit 53 (step 9). Then, the operation is continued until the integrated value matches the set value of the control unit 53, and at the time of the match, the grout pump 51 is automatically stopped via the control unit 53 (steps 9 and 11). Therefore, even with this manufacturing method, advantages similar to those of the first embodiment described in paragraph 0020 can be obtained.
[0028]
The present invention is not limited to this embodiment except for the technical elements described in the claims, and can be appropriately changed according to the manufacturing scale, the equipment installation conditions, and the like. The soil used is soil generated at a construction site and the like, and includes a little sand and gravel. Therefore, the soil is broader than a strictly academic soil.
[0029]
【The invention's effect】
As described above, in the method for producing fluidized soil according to the present invention, a muddy water production section is required as compared with the conventional method, but it is assumed that the mixing section and the agitator section can be omitted. That the equipment structure can be simplified, the required equipment installation area can be greatly reduced, the equipment can be operated without waste, high quality can be maintained by preventing separation of fluidized soil, etc. Has advantages. For this reason, the present invention is particularly advantageous in mass production, because it is possible to reduce the production cost and to be economical, and at the same time, it is possible to increase the number of application cases by making it less likely to be restricted by the installation area. Reduction and effective use of resources can be further promoted. According to the first aspect of the present invention, in the first aspect, the solidified material is pressure-fed from the introduction portion into the pipe and mixed with the muddy water through a kneader, and unnecessary water is mixed into the muddy water adjusted by the muddy water production portion. Therefore, the fluidized soil required is particularly suitable when the density is relatively high (the flow value is relatively low).
[Brief description of the drawings]
FIG. 1 is a manufacturing flow showing the first method of the present invention in its manufacturing process.
FIG. 2 is a diagram schematically showing an apparatus configuration used in the first invention method.
FIG. 3 is a schematic cross-sectional view showing a part A in FIG. 2 and a part B in FIG.
FIG. 4 is a manufacturing flow showing the second method of the present invention in the manufacturing process.
FIG. 5 is a diagram schematically showing an apparatus configuration used in the second invention method.
FIG. 6 is a view showing a conventional procedure for producing fluidized soil.
[Explanation of symbols]
1 is soil, 2 is water, 3 is muddy water, 4 is cement (solidified material), 5 is gravel 6, fluidized soil, 7 is cement slurry,
10 is a muddy water production section, 20 is a transport section,
21 is an agitator vehicle (a transport vehicle with an agitator function),
30 is a cement-based slurry production section, 40 and 50 are supply pipes, 40b is an enlarged diameter section,
42 and 52 are integrating flow meters, 23, 43 and 52 are control units,
44 is a static mixer (continuous kneader), 46 and 48 are introduction parts

Claims (2)

Muddy water whose density has been adjusted in the muddy water production section, and a solidified material such as cement are mixed to a predetermined quality, and a method for producing a fluidized treated soil which is pumped through a supply pipe to a transport vehicle with an agitator function or a casting section,
The supply pipe is arranged between the muddy water production unit and the transport vehicle or the casting unit side, and a pump for pumping the muddy water of the muddy water production unit, and measures an amount of the muddy water pumped by the pump. A flow meter, a continuous kneader connected to the outlet of the pipe, and the solidified material on the silo side connected to the pipe on the near side of the kneader and supplied into the pipe by controlling the input amount by a screw mechanism. And an introduction part to
The mixing ratio between the muddy water of the muddy water production section and the solidified material on the silo side is determined according to the density of the fluidized treated soil, and based on the compounding ratio, the respective supply amounts of the required total amount of the muddy water and the solidified material Is calculated,
The pumping time (t) required for pumping the calculated supply amount of muddy water in the muddy water production unit is predicted, and the discharge time in which the calculated supply amount of the solidified material is entirely discharged from the introduction unit on the silo side is determined. After setting the screw mechanism to be the same as the pumping time (t) of the muddy water,
The transportation vehicle pumps the muddy water of the muddy water production section through the supply pipe via a pump, and simultaneously pressurizes the solidified material on the silo side from the introduction section into the supply pipe, and mixes the mixture through the kneader. Alternatively, a method for producing a fluidized soil, which comprises discharging the soil to a casting portion. Muddy water whose density has been adjusted in the muddy water production section, and a solidified material such as cement are mixed to a predetermined quality, and a method for producing a fluidized treated soil which is pumped through a supply pipe to a transport vehicle with an agitator function or a casting section,
A first pump that is disposed between the muddy water production unit and the transportation vehicle or the casting unit side to pump the muddy water of the muddy water production unit, and a muddy water pumped by the first pump; A flow meter for measuring the amount, a continuous kneader connected to the pipe outlet side, and a slurry manufacturing unit connected to the pipe on the near side of the kneader and adjusted by adding water to the solidified material in advance, An introduction unit for supplying the adjusted slurry to the pipe by controlling the input amount by the second pump,
The mixing ratio between the muddy water of the muddy water production section and the slurry of the slurry production section is determined in accordance with the density of the fluidized soil, and based on the mixing ratio, the respective supply amounts of the required total amount of the muddy water and the slurry are determined. Calculate,
The pumping time (t) required for pumping the calculated supply amount of muddy water in the muddy water production unit is predicted, and the discharge time for discharging the calculated supply amount of slurry from the introduction unit on the slurry production unit side is set. After setting the second pump to be the same as the muddy water pumping time (t),
The slurry of the slurry production section is pumped through the supply pipe via a first pump, and the slurry of the slurry production section is simultaneously pumped from the introduction section into the supply pipe via a second pump via the kneader. A method for producing a fluidized soil, wherein the fluidized soil is discharged to the carrier or the casting part while mixing.

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