JP2004232420A - Soil conditioning machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a soil conditioning machine, obtaining improved earth and sand having a suitable water content in the case of adding water or aqueous solution to obtain improved earth and sand. <P>SOLUTION: At least water or soil conditioning water solution is added to the earth and sand by a tank lorry 11 and a pump 15 and mixed by a mixer 9. The machine includes a sediment supply quantity control means for controlling the quantity of sediment supplied to the mixer 9. The machine further includes a water supply quantity control means for controlling the quantity of water or soil conditioning aqueous solution supplied to the mixer. The machine further includes a proportional control means for controlling the ratio of the quantity of sediment supplied to the mixer, which is controlled by the sediment supply quantity control means to the quantity of water or aqueous solution supplied to the mixer, which is controlled by the water supply quantity control means to have a designated value. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a soil conditioner equipped with means for adding water or an aqueous solution to soil to be improved.
[0002]
[Prior art]
In road construction, foundation construction, or burial construction of gas pipes and water and sewage pipes, the soil is soft, so improve it with cement, lime, etc., and backfill the soil with an appropriate grain size, moisture content, and hardness. You may need to.
[0003]
As such a soil improvement machine, there is one described in Patent Document 1, for example. This conventional soil improvement machine is equipped with a hopper for putting earth and sand to be improved in front of the vehicle body, a container for storing the improvement material in the center, and below it the earth and sand and the improvement material from the container. A mixing device for mixing is installed, and the improved earth and sand dropped from the mixing device is carried out by a conveyor to the rear of the vehicle body to be accumulated.
[0004]
[Patent Document 1]
JP-A-2002-167799.
[0005]
[Problems to be solved by the invention]
In the conventional soil improvement machine as described above, the soil at the site is transported to a place where the moisture content measuring device is distant from the site to measure the moisture content, and then, by referring to the measured value at the site, the soil The soil quality is improved by controlling the amount of additive added to the soil.
[0006]
However, under a condition of easy drying such as high temperature in summer or low humidity in winter, when a considerable time elapses from the time of moisture content measurement to the time of soil improvement work at the site, the soil becomes extremely dry and dry. Cement or quicklime is added to the soil to further improve the soil quality, so that the water content may be excessively low.
[0007]
This is for the following reason. That is, when, for example, quicklime is used as the improving material, the properties of the soil are improved by the following reaction.
(Hydration reaction): Moisture in soil reacts with quicklime to produce slaked lime, and the water content decreases.
(Aggregation reaction): Soil particles aggregate due to exchange of calcium ions and cations on the soil particle surface.
(Posolan reaction): Silica and alumina in the soil react with calcium ions of lime and harden.
(Carbonation reaction): Slaked lime reacts with carbon dioxide and carbon dioxide in the soil to keep solidifying.
[0008]
Of the above reactions, when the soil dries, the hydration reaction further lowers the water content, and the subsequent reaction of the improving material (solidifying material) deteriorates, or the water content deviates significantly from the optimum water content due to insufficient water. Such a problem arises that a fine grain size cannot be obtained, and it is not possible to squeeze and compact well during rolling. Even when cement is added as an improving material, the progress of the hydration reaction is deteriorated due to excessive drying of the soil, and high-quality improved earth and sand cannot be obtained.
[0009]
The present invention has been made in view of the above problems, and has as its object to provide a soil improvement machine capable of obtaining improved earth and sand having a suitable moisture content. Further, the present invention provides a soil conditioner capable of obtaining improved soil with a suitable moisture content regardless of the capacity of these water-based supply devices when water or an aqueous solution is added to obtain improved soil. Aim. Another object of the present invention is to provide a soil conditioner capable of obtaining improved earth and sand having a suitable moisture content even when adding cement or lime as an improving material.
[0010]
[Means for Solving the Problems]
(1) A soil conditioner according to the present invention is a soil conditioner in which at least water or an aqueous solution for soil condition is added to soil and mixed by a mixing device.
Earth and sand supply amount control means for controlling the earth and sand supply amount to the mixing device,
Water-based supply control means for controlling the supply of water or an aqueous solution for soil improvement to the mixing device,
The ratio of the amount of sediment supplied to the mixing device controlled by the amount of sediment supply control means to the amount of water or aqueous solution supplied to the mixing device controlled by the aqueous supply amount control means is controlled to be a predetermined value. And control means for performing the operation.
[0011]
(2) The soil conditioner of the present invention is characterized in that it has a water setting means for setting a supply amount of water or an aqueous solution to the earth and sand.
[0012]
(3) Further, in the soil improvement machine of the present invention, the earth and sand supply amount control means compares the set value of the earth and sand supply amount with the detected value of the actual supply amount so that the supply amount becomes the set value. It is characterized by performing feedback control.
[0013]
(4) Further, in the soil conditioner of the present invention, the water-based supply amount control means compares the set value of the water or aqueous solution supply amount with the detected value of the actual supply amount so that the supply amount becomes the set value. In which feedback control is performed.
[0014]
(5) In the soil conditioner of the present invention, the earth and sand supply amount control means may adjust the earth and sand supply amount when the required amount of water or the aqueous solution exceeds the maximum amount that can be supplied by the water-based supply device. It is characterized by having a means for restricting according to the maximum amount.
[0015]
(6) Further, in the soil conditioner of the present invention, when the required supply amount of water or the aqueous solution is equal to or less than a minimum amount that can be continuously supplied by the water-based supply device, It has a means for intermittently supplying an aqueous solution.
[0016]
(7) Further, the soil improvement machine of the present invention can improve the soil quality when the difference between the set value of the supply amount of water or the aqueous solution and the actual detected value is equal to or more than the set value of the difference for a certain period of time or more. An emergency stop means for stopping the machine is further provided.
[0017]
(8) The soil conditioner of the present invention is further characterized by further comprising an improving material supply means for adding an improving material made of powder to the mixing device.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a side view showing an embodiment of the soil conditioner of the present invention. In this soil improvement machine, a vehicle body 2 is installed on a traveling body 1, and a hopper 3 for charging earth and sand is mounted on a front portion of the vehicle body 2. Further, a hopper 4 for storing an improving material such as cement or lime is mounted behind the hopper 3 (in the present embodiment, at the center of the vehicle body 2). A hydraulic power unit 5 is mounted on the rear part of the vehicle body 2.
[0019]
Below the hopper 4 on the vehicle body 2, a metering and supplying device 6 for improving material and a water adding device 7 are provided. Further, below the hopper 4, the improving material supplied by the metering supply device 6, the earth and sand supplied by a conveyor (feeder) 8 installed below the earth and sand input hopper 3, The mixing device 9 for mixing the water or the soil improvement aqueous solution is installed.
[0020]
The metering and feeding device 6 has, for example, four blades attached to a rotation shaft, accommodates a fixed amount of an improving material between two blades located adjacent to the upper surface, and rotates the lower blade so that the lower surface is When the surface of the soil is to be improved, the improvement material between the blades is dropped downward, and the number of revolutions of the improvement material to the mixing device 9 is controlled by controlling the rotation speed according to the degree of softness of the earth and sand to be improved. Thus, it is possible to obtain an improved earth and sand having suitable hardness, moisture content and particle size.
[0021]
The mixing device 9 includes an even number of rotating shafts 9a and a paddle 9b attached to each rotating shaft 9a. By rotating the pair of rotating shafts 9a in a direction in which earth and sand are sandwiched between the two, The earth and sand introduced from the inlet 9c, the improving material, and water or an aqueous solution for soil improvement are mixed and discharged from the outlet 9d.
[0022]
Reference numeral 10 denotes a conveyor for carrying the improved earth and sand discharged from the mixing device 9 to the front of the soil conditioner. The conveyor 10 is installed between the left and right crawlers 1a of the traveling body 1, and its rear end is located below the outlet 9d for improved earth and sand of the mixing device 9, and its front end is located in front of the soil improvement machine. The conveyor 10 may be configured to discharge the improved earth and sand backward.
[0023]
FIG. 2 is a block diagram showing a mixing control system of the soil improvement machine. In FIG. 2, a water supply device 7 includes a pump 14 that is rotated by a drive motor 13 that is supplied with water from the tank lorry 11 via a water supply pipe 12 and supplies the water to the mixing device 9, a flow rate detector 15 that detects a flow rate of water supply, And a watering valve 18 for opening and closing the water supply tube 12. The drive motor 13 of this embodiment is a three-phase AC motor to which the power of the three-phase AC generator 16 provided in the hydraulic power unit 5 is controlled and supplied by the inverter 17.
[0024]
In order to detect the amount of earth and sand supplied to the earth and sand supply conveyor 8, a speed detector 19 of a drive motor 22 of the conveyor 8 comprising an electric motor or a hydraulic motor, and an earth and sand height for detecting the earth and sand height on the conveyor 8 A detector 20 is provided. The controller 21 is provided with a recording device 23 for recording the supply amount of each mixture and the like. Further, the controller 21 has a setting means 24 for setting various data including a keyboard, a switch, and the like (whether or not to control the proportion of the earth and sand supply amount, the improvement material supply ratio, the amount of water added, and the water supply amount to the earth and sand).
[0025]
The detection signals from the speed detector 19 and the sediment height detector 20 are sent to a controller 21. The controller 21 detects the amount of sediment supplied per time from these detection signals by calculation, and the controller 21 sets the detection values. The drive motor 22 is controlled so as to coincide with the earth and sand supply amount set by the means 24. The drive motor 22, the detectors 19 and 20, and the controller 21 constitute a soil and sand supply amount control unit that performs feedback control.
[0026]
The supply of the improving material is performed by controlling the speed of the metering / supplying device 6 so that the supply amount of the improving material is equal to the supplying amount of the improving material (ratio to the earth and sand) set by the setting unit 24.
[0027]
The water adding operation mode for the supply of water or the aqueous solution can be selected by the setting means 24 into an interlocking operation (hydration amount proportional control) mode or an independent operation (hydration amount constant control). When the water addition operation mode set by the setting means 24 is proportional control, the speed of the motor 13 and the pump 14 is controlled by the inverter 17 so that the water addition amount is always constant with respect to the unit earth and sand supply amount. As a result, the amount of water detected by the flow rate detector 15 is set to a predetermined ratio with respect to the supplied amount of earth and sand. When the water addition mode set by the setting means 24 is a constant control of the water addition amount, the speed control of the drive motor 13 and the pump 14 is performed via the inverter 17 so that the water addition amount becomes the set amount. The inverter 17, the drive motor 13, the pump 14, the flow detector 15, the sprinkler valve 18, and a controller 21 constitute a water supply control unit that performs feedback control.
[0028]
FIG. 3 is a functional block diagram of the controller 21. Reference numeral 21A denotes a drive motor 22 of the conveyor 8, that is, a control panel of a soil and sand supply system, and 21B denotes a control panel of a water supply system. In the control panel 21A, reference numeral 24 denotes an earth and sand supply amount calculating means which is obtained from each detection signal of the speed detector 19 and the earth and sand height detector 20 of the drive motor 22. Reference numeral 25 denotes a unit for instructing start and stop of the conveyor 8 which is a soil and sand feeder, and is configured by a switch. Reference numeral 26 denotes daily report watering data displayed by a display device provided in the control panel 21A, which is printed as a table and recorded as data on a card or a disk.
[0029]
Reference numeral 27 denotes a soil and sand supply amount setting means, which is constituted by the keyboard and the switch. Numeral 28 is a means for instructing an emergency stop, which is constituted by a switch. Numeral 29 is a means for receiving a signal from the emergency stop command means 28 and performing an emergency stop process of the earth and sand supply system and the water supply system. The earth and sand supply system, the water supply system (the drive motor 22, the metering and feeding device 6, the mixing device and the mixing device) 9. The entire water supply device 7) is also stopped. The driver 30 of the drive motor 22 controls the speed of the drive motor 22 based on the supply amount signal set by the earth and sand supply amount setting means 27.
[0030]
In the water-based control panel 21B, 31, 32, and 33 are constituted by display devices of the control panel 21B, and respectively display the amount of soil and sand supplied, the amount of water added, and the amount of accumulated water. Numeral 34 sets the amount of water (the ratio of the amount of water or aqueous solution to the earth and sand (L / m ³ )) when performing the proportional control of the amount of water. .
[0031]
Numeral 35 denotes a water amount tolerance setting means for setting a tolerance between the water amount set by the water amount setting means 34 and the actual detection amount detected by the flow rate detector 15, and comprises a keyboard and a switch. Is done.
[0032]
Reference numeral 36 denotes a water addition operation control unit that performs water addition operation and water addition operation control. The water addition calculation operation control means 36 outputs the water addition amount command signal c to the rotation speed calculation means 37 for controlling the operation of the inverter 17 from the earth and sand supply amount signal a and the water addition amount b from the water addition amount setting means 34. Or the control signal e of the driver 38 of the sprinkler valve 18 and the start / stop signal f to the inverter 17 from the start / stop signal d of the conveyor 8.
[0033]
The rotation speed calculating means 37 controls the inverter so that the rotation speed of the drive motor 13 becomes a rotation speed capable of realizing the proportional control of the water addition amount based on the water addition amount designation signal c from the water addition operation control means 36. An operation control signal g for 17 is created. In this case, the operation control signal g is corrected by referring to the signal i corrected by the flow rate correction coefficient calculating means 39 for the actual water amount detection signal h detected by the flow rate detector 15, and Is corrected to be a suitable amount corresponding to the earth and sand supply amount.
[0034]
Numeral 40 denotes a water amount monitoring means for comparing the water amount command signal c and the water amount detection signal h, and the absolute value of the difference (ch) is set to the difference Δ set by the water amount tolerance setting means 35. When it becomes larger, an abnormal water amount signal j is generated, an emergency stop signal is generated by the emergency stop signal creating means 41, and the earth and sand supply system and the water supply system (the drive motor 13, the mixing device 9, the metering supply The apparatus 6, the drive motor 22 of the conveyor 8, etc.) are completely stopped. At the same time, the abnormal water level indicator lamp 43a and the external abnormal water level indicator lamp 43b on the control panel 21B are turned on.
[0035]
Reference numeral 44 denotes a water accumulation calculating means for calculating the cumulative water by integrating the water command signal c. The value obtained by the calculation is displayed by the cumulative water display means 33. Reference numeral 45 denotes an indicator light for displaying the operation or stop of the pump 14 in response to the on / off of the water addition operation signal f, and reference numeral 46 denotes an indicator light for displaying the open / closed state of the watering valve 18.
[0036]
FIG. 4 is a functional block diagram centering on the water content calculation operation control means 36, and 47 is a proportional control means operated when the operation mode is proportional control of the water content. Normally, the proportional control means 47 corresponds to the set signal based on the earth and sand supply amount a (m ³ ) and the water setting amount signal b (water flow rate L / sediment supply amount m ³ ) from the water addition amount setting means 34. A signal corresponding to the number of rotations is added to the number-of-rotations calculating means 37 of the drive motor 13 of the pump 14 so that the amount of water to be added is increased.
[0037]
Specifically, the control of the amount of water with respect to the amount of treated earth and sand is performed by the following equation (1).
W = (M * 1.6 * K / 100) * 1000 (1)
Here, W is the amount of water (L / hr), M is the amount of treated soil (m ³ / hr), and K is the percentage of water added (%). 1.6 in the equation (1) is the specific gravity of the soil in a loose state (excavated and loosened).
[0038]
49 is a comparing means for comparing the maximum amount of water corresponding to the maximum capacity of the pump 14 with the actually required amount of water. If the required amount of water is equal to or greater than the maximum capacity of the pump 14, The amount of water is set to the maximum amount, and the drive motor 22 of the conveyor 8 restricts the amount of earth and sand supplied so as to match the amount of water. That is, the amount of earth and sand supplied by the signal detected by the earth and sand height detector 20 and the number of rotations of the drive motor 22 detected by the speed detector 19 becomes the amount of earth and sand supplied that matches the maximum amount of water. An operation control signal is applied to the driver 30 of the drive motor 22.
[0039]
Numeral 50 is a comparison means for comparing the minimum amount of water that can be continuously supplied by the pump 14 with the actually required amount of water, and the required amount of water is less than the minimum amount of the pump 14 that can continuously supply water. If so, the inverter 17 is intermittently started and stopped by the intermittent control means 51, and the duty ratio is controlled so that the amount of water added per unit time becomes the set amount.
[0040]
FIG. 5A is a diagram showing the configuration of the control panel 21B, and the same reference numerals as those in FIG. 3 denote the same indicator lamps and switches (41 is a switch provided as the emergency stop signal generating means). The control panel 21B includes a numeric selection switch 52 for selecting what data is to be input and set, a numeric input keyboard 53 for inputting actual data, a display 54, and a display for selecting display contents. And a selection switch 55. Reference numeral 56 denotes a power supply indicator lamp, and 57 denotes an operation preparation indicator lamp, which is turned on when the water adding device 7 is activated in a single operation (constant water addition control) and in an interlocking operation (water addition proportional control). Reference numeral 59 denotes an overload indicator light that lights when the device is overloaded. Reference numeral 60 denotes an operation selection switch for operating the water addition operation independently of the earth and sand supply device when the single operation is selected, and operating in accordance with the operation of the earth and sand supply device when the interlocking operation is selected. Reference numerals 61a and 61b denote a watering operation switch and a watering stop switch that are turned on during the watering operation and when watering is stopped during the single operation operation, respectively. Reference numeral 62 denotes an inverter trip switch, which returns when the switch is pressed when the inverter trips.
[0041]
When the operation selection switch 60 is set to the interlocking side, the display unit 54 displays the set amount (L / m ³ ) of the amount of water with respect to the supplied amount of earth and sand (m ³ ), the actual amount of water (L / min), and The accumulated water amount (L) by the water accumulation amount calculating means 44 is displayed.
[0042]
Further, when the operation selection switch 60 is set to the independent side, the display “independent operation”, the set flow rate (L / min), and the detected flow rate (L / min) are displayed. It should be noted that the display screen of the display 54 has a notation portion of “reset”, and when the portion is pressed, the accumulated water content value on the interlocking operation screen is cleared.
[0043]
The water addition tolerance setting means 35 is realized by setting the allowable time and the allowable flow rate difference with the selection by the numerical value selection switch 52 and the keyboard 53, and setting the display content to the water addition tolerance by the display selection switch 55. In the display 54, the display of "hydration abnormality setting", the allowable time (second), the allowable difference flow rate (%), the command (set value of the amount of water added), and the detection (the detected value of the amount of added water) are displayed. .
[0044]
When the display selection switch 55 is selected on the monitor screen, the display screen of the display unit 54 displays the amount of soil (m ³ / h), the set value for water (L / m ³ ), and the command value for water (L / m ³ ). ³ ), the water detection value (L / m ³ ) for soil and sand is displayed.
[0045]
When the display selection switch 55 is selected on the monitor screen, as shown in FIG. 5B, for example, a water addition command value is displayed by a broken line, and a water detection value is displayed by a solid line graph on the display screen of the display unit 54. In FIG. 5B, the horizontal axis indicates a maximum of 45 seconds, and the vertical axis indicates a maximum of 80 L / min.
[0046]
In addition, when the coefficient adjustment screen is selected, a correction coefficient value is calculated based on the past results of the cumulative water addition command amount and the cumulative water detection amount, and the correction coefficient in the flow rate correction coefficient calculation unit 39 is updated. Correct the error from the water detection value.
[0047]
In this soil conditioner, a water adding device 7 is provided to add water as well as an improving material, so that in the case of soil having a high water absorption or a dry soil having a low water content, improvement of cement, quick lime, etc. By adding water in addition to the material, the water content of the improved earth and sand can be prevented from becoming excessively low, promoting the hydration reaction, having an appropriate water content and particle size, and of good quality that can be compacted and compacted by compaction. Improved soil can be obtained. In particular, soil improvement is suitably performed by measuring the water content at the site and controlling the improving material and the amount of water in accordance with the measured values.
[0048]
Also, a function of using cement as an improving material to be accommodated in the hopper 4 and adjusting the relative mixing amount of soil and sand from the conveyor 8 and adjusting the amount of water from the water adding device 7 to produce soil concrete locally. The construction as a substitute for lap concrete (concrete that becomes the foundation of a building instead of foundation piles) becomes possible.
[0049]
In addition, the present invention can be applied to a stationary soil improvement machine.However, if the invention is applied to a self-propelled soil improvement machine, soil concrete is manufactured locally, thereby eliminating the need to dispose and transport excavated soil, thereby reducing costs. In addition, the addition of the improving material (solidifying material) can be reduced by combining the mixing device 9 with the good mixing degree of the twin-screw paddle mixer. That is, in the foundation work, as in the past, using a hydraulic excavator on site, in the case of a method of mixing water and cement with earth and sand on site, uniform mixing is difficult, to obtain concrete of the required strength Although it is necessary to increase the amount of cement, in the case of the present invention, uniform mixing is possible, so that the amount of cement can be reduced, the quality of soil concrete can be improved, and the efficiency of work can be improved.
[0050]
In addition, the constituent devices are made of a chemical-resistant, acid-resistant, or alkali-resistant material to provide a function of improving contaminated soil. For example, in order to improve acidic soil, an alkaline aqueous solution is added from the water adding device 7 or a chemical agent is added. By adding an aqueous solution for improving soil contaminated by the effluent of contaminated soil, the contaminated soil can be improved and its use can be expanded.
[0051]
In carrying out the above-mentioned water addition, the present invention is provided with a means for controlling the ratio of the amount of earth and sand and the amount of water or aqueous solution supplied to the mixing device 9 to a predetermined value. The soil improvement machine which can obtain the improved earth and sand can be provided. In addition, when the required amount of water exceeds the capacity of the pump 14, the earth and sand supply amount is adjusted to the maximum amount of water, and when the required amount of water is less than the amount of water that can be continuously supplied, water or an aqueous solution is used. Because of the intermittent supply, improved soil with a suitable moisture content is obtained regardless of the capacity of the water supply device. In addition, such control of the amount of water can be performed whether or not cement or lime is added as an improving material.
[0052]
Such water content control can be suitably performed by providing a water content setting means for setting the supply amount of water or aqueous solution to the earth and sand.
[0053]
In addition, since the set value of the earth and sand supply amount is compared with the detected value of the actual supply amount and feedback control is performed so that the supply amount becomes the set value, stable supply of the earth and sand can be performed. it can.
[0054]
Also, feedback control is performed to compare the set value of the supply amount of water or aqueous solution with the detected value of the actual supply amount so as to control the supply amount to the set value. Alternatively, an aqueous solution can be added to the earth and sand.
[0055]
Also, since the difference between the set value of the supply amount of water or the aqueous solution and the actual detection value is equal to or more than the set value of the difference has been provided for the emergency stop means for stopping the soil improvement machine when the state has continued for a certain period of time or more. This prevents an abnormal amount of water from being maintained.
[0056]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the improved earth and sand of suitable moisture content is obtained.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a soil conditioner according to the present invention.
FIG. 2 is a block diagram showing a mixing control system of the soil conditioner of the present embodiment.
FIG. 3 is a functional block diagram of a control system according to the present embodiment.
FIG. 4 is a functional block diagram of a main part of the present embodiment.
FIG. 5A is a diagram showing an arrangement of devices of a control panel for water addition, and FIG. 5B is a graph showing a display example of a command value and a detection value of a water addition amount.
[Explanation of symbols]
1: running body, 2: body, 3: earth and sand input hopper, 4: improvement material input hopper, 5: hydraulic power unit, 6: metering device, 7: water supply device, 8: conveyor, 9: mixing device, 10 : Conveyor, 11: tank lorry, 12: water supply tube, 13: drive motor, 14: pump, 15: water content detector, 16: generator, 17: inverter, 18: watering valve, 19: speed detector, 20: Sediment height detector, 21: controller, 21A: control panel for soil and sand, 21B: control panel for water addition, 23: recording device, 24: setting means, 52: numeric value selection switch, 53: numeric value input amount keyboard, 54: Display, 55: display selection switch, 60: operation selection switch

Claims (8)

In a soil improvement machine that adds at least water or an aqueous solution for soil improvement to soil and mixes with a mixing device,
Earth and sand supply amount control means for controlling the earth and sand supply amount to the mixing device,
Water-based supply control means for controlling the supply of water or an aqueous solution for soil improvement to the mixing device,
The ratio of the amount of sediment supplied to the mixing device controlled by the amount of sediment supply control means to the amount of water or aqueous solution supplied to the mixing device controlled by the aqueous supply amount control means is controlled to be a predetermined value. And a control means for controlling the soil quality. The soil improvement machine according to claim 1,
A soil quality improving machine comprising a water setting means for setting a supply amount of water or an aqueous solution to the soil. The soil improvement machine according to claim 1 or 2,
The earth and sand supply amount control means performs feedback control for comparing a set value of the earth and sand supply amount with a detected value of the actual supply amount so as to control the supply amount to the set value. Soil improvement machine. The soil improvement device according to any one of claims 1 to 3, wherein the water supply control unit compares the set value of the supply amount of water or the aqueous solution with a detected value of the actual supply amount to determine whether the supply amount is sufficient. A soil conditioner for performing feedback control for controlling a set value. The soil improvement device according to any one of claims 1 to 4, wherein the earth and sand supply amount control means includes: when a required supply amount of water or an aqueous solution exceeds a maximum supply amount of the water-based supply device, A soil improvement machine having means for limiting the amount of earth and sand supplied in accordance with the maximum amount. 6. The soil improvement device according to claim 1, wherein the water-based supply amount control unit determines that a required amount of water or an aqueous solution is equal to or less than a minimum amount that can be continuously supplied by the water-based supply device. 7. And a means for intermittently supplying water or an aqueous solution. The soil conditioner according to any one of claims 1 to 6, wherein the difference between the set value of the supply amount of water or the aqueous solution and the actual detected value is equal to or more than the set value of the difference for a predetermined time or more. The soil improvement machine further comprising emergency stop means for stopping the soil improvement machine. The soil improvement machine according to any one of claims 1 to 7, further comprising an improvement material supply means for adding an improvement material made of powder to the mixing device.

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