JP2017160595A - Method and device for manufacturing fluidized soil using ready-mixed concrete manufacturing plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method that uses an existing ready-mixed concrete manufacturing plant for manufacturing ready-mixed concrete and high-quality fluidized soil efficiently and alternately.SOLUTION: A method for manufacturing fluidized soil consists of: (a) a mud process including a mud mixing step in which soil generated by construction work 30, recycled aggregate 31 and water 37 are mixed, a large solid material removal step in which a large solid material is removed from mud, a mud agitation step in which the soil generated by construction work 30 and the recycled aggregate 31 are dispersed in water, a mud transfer step in which mud is transferred into a mud measuring vessel 21, and a mixing drum input step in which mud is input into a mixing drum 10 of an agitator vehicle 9; (b) a cement process including a cement paste formation step in which cement paste 38 is obtained from a ready-mixed concrete manufacturing plant 1, and a mixing drum input step in which the cement paste 38 is input into the mixing drum 10; and (c) an agitation and transport step in which the cement paste 38 and mud are agitated and refilled on the agitator vehicle 9, and then transported to a construction site.SELECTED DRAWING: Figure 2

Description

  TECHNICAL FIELD The present invention relates to a method for producing fluidized soil used as a backfill material for construction sites such as construction and civil engineering using a plant for producing ready-mixed concrete, and an apparatus for producing fluidized soil for carrying out the method. .

At construction sites such as construction and civil engineering, a large amount of soil is dug out and then backfilled. At that time, fluidized soil that mixes soil, water and solidified material is used as backfilling material. Has been.
The reason why the fluidized soil is used as a backfilling material is that the fluidity is increased by water, the backfilling work can be carried out efficiently with a pump, and it can be poured into a narrow gap. This is because the soil is solidified after being backfilled with the solidifying material and the ground is strengthened to prevent uneven settlement.
The fluidized soil is usually produced by mixing mud soil in which soil and water are mixed and a solidifying material as in Patent Document 1 below, but construction generated soil obtained from a construction site is used as a raw material. In some cases, various types of stones and concrete pieces may be included in addition to the soil, making it difficult to obtain a uniform and high-quality fluidized soil.
On the other hand, in order to obtain a fluidized soil with a stable quality, as disclosed in Patent Document 2 below, a manufacturing technique using a raw concrete manufacturing plant using an aggregate manufactured in an aggregate plant as a raw material has been proposed. Yes.
The raw material soil used in Patent Document 2 does not use the construction generated soil generated at the construction site, but is mainly made of raw material collected at the raw stone mountain and manufactured at the aggregate plant of the factory. Since raw mortar manufactured in a plant for manufacturing ready-mixed concrete is used, fluidized soil with high homogeneity can be obtained.
However, the invention of Patent Document 2 does not have a recycling concept of effectively reusing soil excavated from a construction site or the like. For this reason, the large amount of excavated soil is not only discarded in vain, but it is not considered at all that the discarded soil may destroy the environment of the sea and the mountain. .

On the other hand, in a conventional plant for producing ready-mixed concrete, raw-contained raw materials such as cement and gravel are stored in containers in the upper part of the tower, and the amount of each raw material is weighed and put into a stirring vessel, and water is added. The ready-mixed concrete is produced by stirring and mixing, and fluidized soil is also produced by using this tower-shaped ready-mixed plant for production as it is.
Components in grater, sand, cement, and other components contained in raw concrete obtained at a plant for producing ready-mixed products are defined in JIS standards, and ready-mixed products that contain foreign substances other than raw materials that meet the standards cannot be sold as products.
For this reason, when producing ready-mixed concrete in a ready-mixed manufacturing plant and also producing fluidized soil, in order to maintain the ready-mixed production, the inside of the stirring tank containing the soil and cement is out of the standard for ready-mixed products. It was necessary to clean the inside of the device used for the production of the fluidized soil so that no foreign matter (soil, etc.) remained, and this cleaning operation greatly reduced the production efficiency.
In addition, since the production of ready-mixed concrete that requires strict quality control is prioritized in the conventional ready-mixed manufacturing plant, there is not enough equipment for the production of fluidized soil. It was difficult to provide chemical treatment soil.

JP 2014-101688 A JP 2012-87562 A

  The present invention has been made in view of the above circumstances, and can be produced by using an existing plant for producing ready-mixed concrete to efficiently produce the ready-mixed material and the fluidized soil, and uniformly from raw materials such as construction generated soil. It is an object of the present invention to provide a method for producing a target and high-quality fluidized soil and an apparatus for carrying out the method.

In order to achieve the above object, a method for producing a fluidized soil using the ready-mixed plant manufacturing plant according to claim 1 of the present invention includes: (a) construction generated soil, recycled aggregate and water in a mud mixing tank. A mud mixing step for stirring and mixing, a large solid removing step for removing large solids having a predetermined diameter or more from the mud obtained in the mud mixing step, and the mud from which the large solids have been removed. A mud stirring step for stirring and mixing at a speed faster than the stirring speed of the mud mixing step so that the contained construction generated soil and recycled aggregate are dispersed in water, and the mud obtained in the mud stirring step are already installed. A mud that has a mud transfer process for transferring it into a mud weighing container newly established exclusively for mud in a plant for manufacturing raw concrete, and a mixing drum charging process for charging the mud in the mud weighing container into a mixing drum of an agitator car System steps; (b A cement-based process comprising: a cement paste process for obtaining cement paste by mixing cement and water in the plant for producing ready-mixed concrete; and a mixing drum charging process for charging the cement paste into a mixing drum of an agitator car When,
(C) A stirring and transporting step of transporting the cement paste and mud put in the mixing drum of the agitator vehicle to a backfilling site while stirring and mixing.

  The invention described in claim 2 is a fluidized soil production apparatus for implementing the fluidized soil production method using the ready-mixed concrete production plant of claim 1, wherein (a) cement, gravel, etc. A raw material storage container for storing raw material raw materials separately for each raw material, a weighing machine provided for each raw material storage container, a mixer for adding raw materials weighed by the weighing machine, adding water and stirring and mixing, and stirring and mixing with the mixer A loading hopper for loading ready-mixed concrete into an agitator vehicle and a load receiving space below the loader, and an existing ready-mixed plant for preparing ready-made ready-mixed food from the top to the bottom of the plant tower; and (b) provided outside the ready-mixed plant for manufacturing, A mud mixing tank provided with a mixing means capable of stirring and mixing construction generated soil, recycled aggregate and water, and stirring means for obtaining mud in which the construction generated soil and recycled aggregate contained are dispersed in water. Mud agitation A mud transfer means provided between the mud mixing tank and the mud stirring tank so that the mud can be transferred from the mud mixing tank to the mud stirring tank, and a large solid from the mud transferred by the mud transfer means. A large solids removal machine provided between the mud transfer means and the mud agitation tank so as to be able to remove matter, and (c) newly installed exclusively for mud inside the plant for producing ready-mixed food, above the load receiving space A provided mud weighing container; a mud loading pipe having an upper end connected to the mud weighing container and having a lower end opened near the discharge port of the loading hopper; and (d) an inside and an outside of the plant for producing ready-mixed concrete. Provided with a pressure feed pump capable of connecting the base end to the mud stirring vessel and connecting the end to the mud measuring vessel and pumping the mud in the mud stirring vessel to the mud measuring vessel. Mud pumping pipe Characterized in that it consists.

In the method for producing fluidized soil according to claim 1 of the present invention, cement paste is produced by mixing cement and water in an existing ready-mixed plant for producing cement paste in the cement-based process. In the step, the construction generated soil, the regenerated aggregate, and water are mixed outside the plant for producing ready-mixed concrete, and large solids are removed, and mud in which the raw material is dispersed in water is produced. The mud is transferred to a mud measuring container dedicated to mud newly installed in the plant for producing raw concrete.
Then, the cement paste obtained in the plant for producing ready-mixed concrete and the mud in the mud weighing container are separately fed into the same mixing drum of the agitator car, and further, in the agitating and transporting process, in the mixing drum of the agitator car At the same time, using the diffusion phenomenon seen when mixing two types of fluids, cement paste and mud, the mixture is stirred and transported to the backfill site while being stirred and mixed.

In the cement-based process, cement paste is obtained in the ready-mixed production line of the existing ready-mixed production plant, but the cement and water used are raw materials used in the production of ready-mixed food, and are excluded for ready-mixed food during this process. It should not contain any foreign material.
On the other hand, in the mud-based process, mud that is a foreign matter to be removed from the ready-mixed concrete is produced. However, since the mud-based process is different from the cement-based process, It is not related to the ready-mixed production line at all.
Therefore, since the equipment related to the ready-mixed concrete production line will not be soiled with mud, immediately after producing the fluidized treated soil, it will continue to produce high-quality ready-mixed concrete without any post-treatment such as washing. Can do.
As a result, the production of ready-mixed corn and the production of fluidized soil can be performed continuously in the same ready-mixed plant production plant, and the production efficiency of ready-mixed rice and the fluidized treated soil can be greatly increased. Is possible.
In the agitating and conveying process, the cement paste and the dispersed mud are continuously agitated and mixed in the mixing drum of the agitator vehicle while being conveyed by the agitator vehicle, and before the agitator vehicle arrives at the backfill site. Since the fluidized soil will be completed in the mixing drum of the agitator car, the fluidity of the high-quality fluidized soil will be refilled at the appropriate timing before the cement begins to harden. Can be offered in high condition.
Furthermore, in the large solids removal process, foreign matters unsuitable for fluidized soil such as large stones and waste concrete with a certain diameter or larger are removed, and in transferring mud during production, an excessive load is applied to the pressure pump. This makes it possible to quickly transfer mud without clogging the transfer pipe, and to obtain high-quality fluidized soil that does not contain large solids suitable for backfilling. Then, the fluidized soil can be surely poured into a small gap without obstructing the pouring route due to the large solid matter.
In addition, there are various types of construction generated soil depending on the location of the generation, but the large solids removal process removes large solids unnecessary for the fluidized soil contained in the construction generated soil. The generated soil can be used, and as a result, a large amount of construction soil that can be discarded and cause environmental damage can be reused for backfilling.
Furthermore, by mixing an appropriate amount of recycled aggregate that has been recycled and subjected to sizing management, it is possible to provide fluidized soil with optimum quality according to the performance required at the backfill site.

In the fluidized soil manufacturing apparatus according to claim 2, cement paste is manufactured using a ready-mix production line of an existing ready-mixed plant for production of soil, a mud mixing tank, a stirring and mixing tank, a large solids removal machine, etc. A mud is produced using.
Since the mud mixing tank, the stirring and mixing tank, and the large solids removal machine are provided outside the biocon production plant, the mud soil from which the large solids are removed and the raw materials are dispersed in water is It is possible to manufacture without entering the manufacturing line at all.
In addition, the ready-mix manufacturing plant is provided with a new mud measuring container dedicated to the mud completely separate from the ready-mix manufacturing line, and the mud is transferred to the mud measuring container from the stirring and mixing tank outside the ready-mixed manufacturing plant via the mud transfer means. The mud is introduced into the mixing drum of the agitator car from the mud loading pipe.
On the other hand, the cement paste made using the ready-mixer production line is fed into the mixing drum of the agitator car through the loading hopper of the ready-mixer production line, and the cement paste and mud are combined together for the first time in the mixing drum of the agitator car. It becomes.
As described above, the mud can be produced without being mixed into the production line of the ready-mixed concrete in the ready-mixed manufacturing plant.
Cement paste is produced in the production line of the ready-mixed concrete in the ready-mixed plant, but since cement is not a target for foreign matter to be cleaned in the ready-mixed manufacture, the production of ready-mixed and the production of fluidized soil is alternated. Sometimes it is possible to continuously produce both raw concrete and fluidized soil using the same ready-mixed plant, without cleaning the inside of the ready-mixed manufacturing plant each time. As a result, it is possible to greatly increase the production efficiency of the fluidized soil.
In addition, since it is not necessary to construct a new manufacturing plant dedicated to large fluidized soil, the construction cost of the manufacturing apparatus can be greatly reduced.
And the said manufacturing method can be reliably implemented with this manufacturing apparatus, and high quality fluidized soil is obtained efficiently.

It is a flowchart which shows the manufacturing process of the manufacturing method of the fluidization processing soil of this invention. It is a typical side view which shows the manufacturing apparatus of the fluidization processing soil of this invention. FIG. 3 is a schematic plan view of the manufacturing apparatus of FIG. 2.

This invention is the manufacturing method of the fluidization processing soil which uses the plant for raw food manufacturing, and the manufacturing apparatus of the fluidization processing soil for implementing the manufacturing method, First, the manufacturing method is demonstrated.
As shown in FIG. 1, the fluidized soil manufacturing method of the present invention includes (a) a mud-based process, a mud mixing process, a large solid removal process, a mud stirring process, a mud transfer process, and a mixing drum. A process, (b) a cement-based process, a cement paste forming process and a mixing drum charging process, and (c) a stirring and conveying process.
The mud-based process and the cement-based process are separately surrounded by a one-dot chain line in FIG. 1 and indicate that the cement-based process and the mud-based process are performed in different systems without intersecting. is there.
Moreover, the process enclosed with the broken line shows the process performed inside the plant for manufacturing ready-mixed concrete, and the process performed outside the plant for manufacturing ready-mixed food outside the broken line is distinguished.

These processes will be described in detail below from the mud-based process.
The process before the mud transfer process in the mud system process is a process performed outside an existing ready-mixed concrete production plant.
The mud mixing step is a step of stirring and mixing the construction generated soil, the recycled aggregate, and water in a mud mixing tank provided near the outside of the plant for producing ready-mixed concrete.

  The fluidized soil of the present invention is used for backfilling at construction sites such as construction and civil engineering as described above, and has high fluidity so that it can be poured, and after the backfilled soil is solidified. It is a material that develops a certain level of strength, and is a material produced by mixing recycled aggregates and raw materials of construction generated soil with water and cement.

  The construction generated soil that is a raw material of the present invention is recyclable earth and sand that is generated at the time of foundation work at a construction site, land excavation work at a civil engineering site, etc. In addition to soil such as sand, sandy soil, and red soil, foreign matter such as stones and concrete pieces of various sizes and shapes may be mixed.

In the present invention, among these foreign substances, large solids such as large stones that are pumped by a pump and cannot pass through the pipe, and stones or concrete pieces that are desired to be removed at the backfill site are called “large solids”.
The backfilling work is carried out by pouring the fluidized soil into the indentation etc. of the site with a pressure feed pipe, but large solids such as large stones that are difficult to flow through the pressure feed pipe will reduce or pour out the amount of outflow per hour. If the location is a small gap, the flow path to the gap is blocked, and as a result, there is a possibility that an unflowed portion may occur.

Moreover, the recycled aggregate which is the raw material of the present invention is an aggregate obtained by crushing wastes such as concrete generated in a building demolition work into small pieces and particles and sizing them.
In the present invention, aggregates having a particle size of 30 mm under, 20 mm under, 10 mm under, etc. are appropriately selected and used. Normally, recycled aggregate with a maximum of 40 mm under pressure feed pipes used in backfilling work. Can be used.

  Moreover, well water, tap water, river water, etc. can be used for water, and the supernatant water obtained by a manufacturing process can also be reused.

  The blending amount of each raw material can be freely selected depending on the backfilling site to be used. For example, a recycled aggregate having a particle diameter under 20 mm is selected, and the selected recycled aggregate and construction are selected. It is possible to mix the generated soil with the same weight. Further, for example, the recycled aggregate and the construction generated soil can be used by freely selecting a ratio such as 8 to 2 or 2 to 8 by weight.

  The method of stirring and mixing in the mud mixing step can be, for example, a method in which an excavator of a shovel car for pouring the raw material in the raw material storage place into the mud mixing tank is slowly stirred in the mud mixing tank. The mud thus obtained may contain large solids such as large stones or concrete fragments contained in the construction generated soil as described above. In the next large solid removal step, large solids having a certain diameter or more can be easily selected and removed from the solids.

In the next large solids removal process, large solids such as large stones and concrete pieces may be mixed in the construction generated soil as described above. Therefore, the fixed diameter contained in the construction generated soil of the raw material is included. The above large-diameter solid is removed from the mud obtained in the mud mixing step.
The method can be carried out, for example, by placing in a sieve having a net through which a certain diameter or more remains and a smaller one passes.
Further, if the recycled aggregate to be used includes an aggregate having a diameter to be removed, it can be removed in this step.
Then, the obtained solid matter having a diameter larger than a certain diameter is removed, and the mud is sent into a mud stirring tank provided outside the plant for producing ready-mixed concrete.

In the next mud agitation step, the large solids larger than a certain diameter obtained in the large solids removal step are removed, and the mud is placed in the mud agitation tank provided outside the plant for producing ready-mixed concrete. This is a step of sufficiently stirring and mixing until the construction generated soil and recycled aggregate are dispersed in water.
As the agitator in the mud soil agitation tank, for example, a screw rotation type agitator in which construction generated soil and recycled aggregate can be dispersed in water can be used, and in the agitator, construction generated soil and recycled aggregate are rapidly rotated by a screw. Can be sufficiently stirred and mixed until these are uniformly dispersed.

  When the particle size of the reclaimed aggregate used is small, there is no reclaimed aggregate removed in the large solids removal step, so that the reclaimed aggregate is not directly added to the mud mixing step. You may throw into a mud stirring process.

In the next mud transfer step, the dispersed mud in the mud agitating tank outside the ready-mixed plant is pumped in the required amount in the mud measuring container located at a high position in the ready-mixed plant. This is a step of pumping with a pump.
In the pressure pump, stones having a diameter of about 40 mm can be pumped together with the mud, but according to the pumping ability of the pressure pump, a sieve size such as 20 mm under and 10 mm under in the large solid removal step can be selected.

The next mixing drum feeding step is a step of feeding the weighed mud in the mud weighing container weighed in the raw concrete manufacturing plant into the mixing drum of the agitator car.
The above mud-based process does not at all intersect with the production process of the ready-mixed concrete in the existing ready-mixed concrete production plant. For this reason, no mud is mixed into the ready-mixed product when producing the ready-mixed product. It is possible to continuously produce the ready-mixed parts without washing the hopper or the like.

Next, the cement-based process will be described in detail.
The cement-based processes are all performed inside the ready-mixed plant.
Among them, the cement paste forming step is a step of making cement paste using cement and water as raw materials with an apparatus provided in an existing ready-mixed plant manufacturing plant.
In this process, the required amount of the mud in the mud measuring container in which the cement in the raw material storage container provided in the plant for producing ready-mixed concrete is weighed is weighed, and the weighed cement is added to supply the appropriate amount of water. In addition, stir and mix with a mixer until it becomes a paste. The cement paste obtained in this process is also called cement milk.
The amount of cement with respect to the mud obtained in the mud-based process is such that as the proportion of cement increases, the soil after backfilling becomes tighter, and the blending ratio is determined according to the demand of the backfilling site. .

The next mixing drum charging step is a step of charging the cement paste into the mixing drum of the agitator vehicle.
The above cement-based processes are carried out in an existing ready-mixed concrete production plant so as not to intersect with the mud-based processes, and the raw material cement and water are materials used in the production of ready-mixed foods and do not become foreign matter to the ready-mixed foods. Therefore, it is possible to continue to produce the ready-mixed containers without washing the inside of the apparatus used immediately after this.

Next, the agitation transporting process performed after the above mud-based process and the cement-based process will be described.
In the agitating and conveying step, the cement paste and the mud received in the mixing drum of the agitator vehicle are combined together for the first time, and both are agitated and mixed by the diffusion phenomenon that is one of the characteristics of the fluid and the rotation of the mixer.
This stirring and mixing is continuously carried out during transportation and arrives at the backfilling site, and the final large solids are removed to complete a high-quality fluidized soil in which particles are uniformly dispersed. The fluidized soil that has arrived at the site will begin to solidify after being poured.
For this reason, it is possible to efficiently perform the backfilling operation in the state where the fluidity is the highest, and the fluidity of the fluidized soil fills the narrow gap in which the mud is difficult to flow in without leakage.

As mentioned above, although the manufacturing method of the fluidization processing soil was demonstrated, the manufacturing apparatus of the fluidization processing soil for enforcing the manufacturing method is demonstrated next.
This manufacturing apparatus is roughly divided into a portion provided inside an existing bio-conducting plant, a portion provided outside the bio-conducting plant, and a portion provided with a portion connecting the two.

First, the internal structure of an existing raw concrete manufacturing plant will be described.
In the present invention, an existing general production plant for producing raw corn is used as an internal portion of the plant for producing biocon 1.
For example, as shown in FIG. 2 and FIG. 3, the raw concrete manufacturing plant is fed from the upper part to the lower part of the plant tower 27 constructed by the frame 28 and the like by the cement 36 and the belt conveyor 40 which are pumped by the blower 41. Raw material container 2 such as sand that has been distributed and fed by turn head 25, and a measuring device 3 that measures the amount of the raw material attached to the lower outlet of the raw material container 2, A measuring container 4 for storing the discharged raw material, a mixer 6 for charging the raw material in the measuring container 4 and adding water introduced from the water supply unit 5 provided in the plant tower 27 and stirring and mixing, a lower part of the mixer 6 A loading hopper 7 provided on the loading hopper 7 and a load receiving space 8 capable of supplying the raw concrete discharged from the discharge port 7a of the loading hopper 7 into the mixing drum 10 of the agitator wheel 9 are sequentially provided.
In FIG. 2, reference numeral 26 denotes a parking gate 26 into which the agitator wheel 9 is inserted, and reference numeral 23 denotes an on-off valve 23 for discharging mud.
And since the ready-mixed kon is also produced in the above existing ready-mixed manufacturing plant, the apparatus used for the ready-mixed manufacturing is maintained as it is so that the ready-mixed can be manufactured, and the plant tower 27 of the ready-mixed manufacturing plant. In addition, by providing a device for introducing mud into the mixing drum 10 of the agitator wheel 9 completely separate from the production line for the ready-mixed concrete, the ready-mixed manufacturing plant can be used for producing the fluidized soil.

In the production of the fluidized soil, the cement paste 39 is mixed with the mud, and the cement paste 39 is produced by using the apparatus for producing the ready-mixed plant of the existing ready-mixed plant 1 as it is.
Then, a cement paste 39 is made from the cement 36 and water 37 as raw materials inside the ready-mixer manufacturing plant 1.
2, the cement paste 39 in the raw material storage container 2 provided inside the plant 1 for producing ready-mixed concrete shown in FIG. 2 is weighed by the measuring device 3 with respect to the mud in the mud measuring container 21. The measured cement 36 is put into the mixer 6 and, at the same time, a suitable amount of water 37 is added and stirred and mixed until it becomes a paste in the mixer 6.
The cement paste 39 is discharged from the discharge port 7a of the loading hopper 7 provided at the lower portion of the mixer 6 into the mixing drum 10 of the agitator wheel 9 that has been waiting.

  The mud mixed with the cement paste 39 is manufactured outside the plant 1 for producing ready-mixed concrete, and the manufactured mud can be put into the mixing drum 10 of the agitator car 9 at the same time as the cement paste 39. In addition, using the part of the plant tower 27, the ready-mixer is newly provided separately from the production line of the production apparatus.

Next, the new part provided in the existing raw-kon manufacturing plant 1 for the mud will be described with reference to FIG.
A mud measuring container 21 is provided above the mixer 6 in the plant tower 27 of the ready-mix manufacturing plant 1 for measuring a required amount of mud produced outside the ready-mix manufacturing plant 1.
A reference numeral 22 in FIG. 2 is a measuring instrument 22 that is provided on the upper part of the mud measuring container 21 and measures mud put in the mud measuring container 21.
Further, a mud discharge pipe 24 is provided in the plant tower 27 via the opening / closing valve 23 to drop the mud in the mud measuring container 21 into the mixing drum 10 of the agitator wheel 9 and send it out.
The upper part of the mud discharge pipe 24 is connected to the mud weighing container 21, and the lower discharge port 24 a is provided near the discharge port 7 a of the loading hopper 7 in the load receiving space 8, and the mixing drum 10 of the parked agitator car 9 is inserted. The discharge port 24a is brought close to the guide portion 11.

  The structure of the existing ready-mix manufacturing plant and the structure of the mud apparatus newly provided in the ready-mixed manufacturing plant have been described above. Next, the mud manufacturing apparatus provided outside the ready-mixed manufacturing plant 1 will be described.

As shown in FIGS. 2 and 3, the mud mixing tank 14 and the mud stirring tank 15 are provided in the vicinity of the outside of the plant 1 for producing ready-mixed concrete, and the mud mixing tank 14 and the mud stirring tank 15 are provided. A large solid material removal machine 17 is disposed between them.
Further, a raw material storage place for the construction generated soil 30 and the recycled aggregate 31 is provided in the vicinity thereof.

  As the mud mixing tank 14 and the mud mixing tank 15, as shown in FIG. 2, a water tank in which land is dug, a ground water tank in which an iron plate is formed in a box shape, or the like can be used.

The mud mixing tank 14 includes mixing means 12 for obtaining mud mixed by mixing the construction generated soil 30 and the recycled aggregate 31 in water.
The mixing means 12 slowly stirs the raw material charged into the sludge mixing tank 14 in the water 32 to form mud. For example, as shown in FIG. 2 and FIG. The soil 30 and the regenerated aggregate 31 are scooped up with an excavator of an excavator and put into the mud mixing tank 14, and the excavator part of the excavator is put into the mud mixing tank 14 and the raw material is stirred slowly to generate construction. A mud in which the soil 30 and the recycled aggregate 31 are mixed can be obtained.
In addition to the shovel car, the mixing means 12 may be a rod-like or plate-like rotating body that is rotated by a motor.
The mud 33 obtained in the mud mixing tank 14 may be mixed with large solids such as large stones and concrete pieces contained in the raw material construction generated soil 30. By converting this raw material into mud, solids in the construction generated soil 30 are washed out, and this is sent to the large solids remover 17 so that large solids having a certain diameter or more can be selected and removed from the solids. It becomes like this.

As shown in FIG. 2, between the mud mixing tank 14 and a mud stirring tank 15 described later, a pumping pipe 16 for pumping the mud 33 is disposed at the base end portion of the mud mixing tank 14 and a distal end portion. The discharge port 16a is disposed above the mud stirring tank 15, and the pumping pipe 16 is provided with a pumping pump 18 capable of pumping the mud 33.
A large solid material removing machine 17 is disposed below the discharge port 16a of the pressure feeding pipe 16.
The large solid material removal machine 17 receives the mud discharged from the discharge port 16a of the pressure feed pipe 16 above the mud stirring tank 15, and receives large stones, concrete pieces, and the like washed with water 32 from the mud. This is a device capable of sorting and removing large-diameter solids 34 having a certain diameter or more, and putting the mud 35 from which the large-diameter solids 34 have been removed into the lower mud stirring tank 15, and selectively removing the large-diameter solids 34. For this reason, a sieve having a net that remains larger than a certain diameter and through which the smaller one passes can be used.
For example, if the sieve has a size under 20 mm, solids larger than 20 mm can be excluded.

Next, the mud stirring tank 15 is agitated and mixed by the agitation means 13 until the large solids larger than a certain diameter are removed by the large solids remover 17 and the mud is further dispersed in water. Is.
Therefore, the mud stirring tank 15 is provided with stirring means 13.
The stirring means 13 can be, for example, a screw-rotating stirrer powered by a motor that can disperse construction generated soil 30 and recycled aggregate 31 in water 32, and the stirrer is constructed by a screw that is rotated quickly. The generated soil 30 and the recycled aggregate 31 can be sufficiently stirred and mixed until they are dispersed in the water 32. And the mud 35 in which the mixture was disperse | distributed uniformly is obtained.

  And, in order to send the necessary amount of the mud 35 dispersed in the mud stirring tank 15 to the mud measuring container 21 newly installed in the plant 1 for producing raw concrete, the base end portion is arranged in the mud stirring tank 15, A pumping pipe 20 for feeding mud is connected to a weighing machine 22 provided at the top of the mud measuring container 21, and the pumping pipe 20 has the ability to pump mud to the soil measuring container 21. A pressure pump 19 is attached.

In producing the fluidized soil using the fluidized soil production device, the mud 35 in the mud measuring container 21 is dropped into the mixing drum 10 of the agitator wheel 9 through the mud discharge pipe 24, while The cement pace 38 in the loading hopper 7 is discharged from the discharge port 7a and is put into the mixing drum 10 of the agitator wheel 9.
Further, during transportation, the fluidized soil is obtained by sufficiently stirring and mixing in the mixing drum 10 of the agitator wheel 9.
Therefore, when performing mud-based processes such as production and transfer of mud, the existing ready-mixed mixer production line such as the mixer 6 and the loading hopper 7 for mixing ready-mixed food in the ready-mixed manufacturing plant is not used at all. In addition, no mud component, which is a foreign matter for the ready-mixed concrete, does not remain, and it is not necessary to perform cleaning for the ready-mixed manufacture after the production of the fluidized soil.
For this reason, it becomes possible to manufacture each of the ready-mixed concrete and the fluidized treated soil efficiently.

  The mud weighing container 21 is provided above the mixer 6 of the plant tower 27, and another mud discharge pipe is arranged next to the mud discharge pipe 24 so that the mud in the mud weighing container 21 can be sent to the mixer 6. It can also be installed side by side. When using this juxtaposed mud discharge pipe, a cement paste 39 and mud are mixed in the mixer 6 in the ready-mix manufacturing plant, and the mixer 6 and the loading hopper 7 are washed when the ready-mixed concrete is manufactured. However, the backfilling site is too close, and it can be provided in preparation for supply in the case where the stirring time in the mixing drum 10 of the agitator wheel 9 cannot be taken sufficiently.

  In the present invention, the ready-mix manufacturing plant can use the existing ready-mixed manufacturing plant as well as the newly-prepared ready-mixed manufacturing plant, and the raw material of the fluidized soil is the construction generated soil generated from any site. Can also be used.

DESCRIPTION OF SYMBOLS 1 Plant for raw food manufacturing 3 Container according to raw material 3 Light weight machine 4 Weighing container 5 Water supply part 6 Mixer 7 Loading hopper 7a Loading hopper discharge port 9 Agitator car 10 Mixing drum 11 Input guide part 12 Mixing means 13 Agitation means 14 Mud mixing tank 15 Mud stirring tank 16 Pressure feed pipe 16a Discharge port 17 Large solid matter removal machine 18 Pressure feed pump 19 Pressure feed pump 20 Pressure feed pipe 21 Mud measurement container 22 Meter 23 Open / close valve 24 Mud discharge pipe 24a Discharge port 25 Turn head 26 Plant parking gate 27 Plant tower 30 Construction generated soil 31 Recycled aggregate 32 Water 33 Mixed mud 34 Large solid 35 Dispersed mud 36 Cement 37 Water 38 Cement paste 39 Fluidized soil 40 Belt conveyor 41 Blower

Claims (2)

(A) A mud mixing step of stirring and mixing construction generated soil, recycled aggregate, and water in a mud mixing tank, and a large solid material having a certain diameter or more removed from the mud obtained in the mud mixing step. Agitation and mixing at a speed higher than the agitation speed of the mud mixing step so that the construction generated soil and the reclaimed aggregate contained in the mud from which the large solid matter has been removed are dispersed in water. A mud stirring step, a mud transfer step for transferring the mud obtained in the mud stirring step into a mud measuring container newly established exclusively for mud in an existing green concrete manufacturing plant, and the mud in the mud measuring container A mud-based process comprising a mixing drum feeding process for feeding into the mixing drum,
(B) Cement comprising a cement paste process for obtaining cement paste by mixing cement and water in the ready-mixed plant, and a mixing drum feeding process for feeding the cement paste into a mixing drum of an agitator car System processes,
(C) an agitating and conveying step of conveying the cement paste and mud put in the mixing drum of the agitator vehicle to a backfill site while stirring and mixing;
A method for producing a fluidized soil using a ready-mixed plant for producing green concrete. (A) Raw material storage container for storing raw materials such as cement and gravel separately for each raw material, a measuring machine provided for each raw material storage container, a mixer for adding the raw material weighed by the measuring machine, adding water and stirring and mixing, the mixer An existing production plant for producing ready-mixed concrete, equipped with a loading hopper for loading the ready-mixed product obtained by stirring and mixing in the agitator car and a load receiving space below the loading hopper in order from the upper part to the lower part of the plant tower;
(B) is provided outside the plant for producing ready-mixed food,
A mud mixing tank provided with a mixing means capable of stirring and mixing construction generated soil, recycled aggregate and water, and stirring means for obtaining mud in which the construction generated soil and recycled aggregate contained are dispersed in water. A provided mud stirring tank, mud transfer means provided between the mud mixing tank and the mud stirring tank so that the mud can be transferred from the mud mixing tank to the mud stirring tank, and the mud transferred by the mud transferring means A large solids remover provided between the mud transfer means and the mud stirring tank so that large solids can be removed from
(C) Newly established exclusively for mud in the plant for producing ready-mixed concrete,
A mud weighing container provided above the load receiving space; a mud loading pipe having an upper end connected to the mud weighing container and having a lower end opened near the discharge port of the loading hopper;
(D) provided between the inside and outside of the plant for producing ready-mixed food,
A mud pressure feeding pipe having a pressure feed pump that connects a base end to the mud stirring tank and a terminal to the mud weighing container, and can pump the mud in the mud stirring tank to the mud weighing container;
An apparatus for producing a fluidized soil for carrying out the method for producing a fluidized soil according to claim 1.

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