Curing material supply device

Abstract

To prepare homogeneous solidifying soil by efficiently and uniformly adding a solidifying material to raw material soil to improve the working efficiency of agitating and mixing.SOLUTION: An agitating device 10 comprises an upper solidifying material injection pipe 18A provided between an upper agitator 14A and the lower agitating body 14B, and a lower solidifying material injection pipe 18B provided below the lower agitator 14B. A solidifying material supply device 50 that supplies a solidifying material to the agitating device 10 comprises a supply pump 54 that supplies a predetermined constant flow rate of solidifying material from a solidifying material tank 52 to the upper solidifying material injection pipe 18A and the lower solidifying material injection pipe 18B through an external supply pipe 60, an upper adjustment valve 56A for adjusting the amount of solidifying material supplied to the upper solidifying material injection pipe 18A, a lower adjustment valve 56B for adjusting the amount of solidifying material supplied to the lower solidifying material injection pipe 18B, and a supply control unit 204 that controls the supply of the solidifying material to the upper solidifying material injection pipe 18A and the lower solidifying material injection pipe 18B.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a solidifying material supplying device. [Background technology]

[0002] Many fill dams and reservoirs are aging and in need of embankment repairs (for earthquake reinforcement and to prevent water leakage), but in recent years, due to increasing urbanization in the surrounding areas, it has become difficult to obtain the embankment soil needed for embankment repairs. Meanwhile, although the muddy soil that has accumulated at the bottom of reservoirs is causing a decrease in storage capacity and a deterioration in water quality, making it necessary to remove it, it is difficult to secure disposal sites for the soil, and so the problem is that the soil has to be disposed of as industrial waste. Therefore, a crushing and compaction embankment method has been proposed that balances the difficulty of obtaining embankment soil with the removal and disposal of bottom mud, and does not require environmental destruction associated with securing embankment soil and soil disposal sites.This method involves attaching the embankment soil prepared by solidifying and improving the bottom mud, which is the raw mud soil, or a mixture of bottom mud and excavated soil from construction work, with a cement-based solidification material so that it has the required strength and water impermeability, to the excavated part of the upstream side of the existing embankment. The procedure is as follows: first, a cement-based solidification material is added to the raw soil, such as bottom muddy soil accumulated in the reservoir, and mixed while stirring to create an initial solidified soil. Next, the initial solidified soil is crushed and the crushed soil is spread evenly, and the soil is compacted a predetermined number of times to build an embankment layer by layer. Here, as an apparatus used for preparing solidified soil, for example, a self-propelled base machine equipped with a mixing device for mixing and stirring raw soil and solidification material slurry is known (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-129987 A Summary of the Invention [Problem to be solved by the invention]

[0004] When carrying out the solidification process in the above-mentioned crushing and rolling embankment method, the raw soil is poured into a solidification pit that has been constructed to a certain depth and width to create the solidified soil. Therefore, the mixing device is pushed into the raw soil in the solidification pit, and the solidification material is added and mixed while repeatedly moving back and forth in the front-to-back direction (width direction) and up-to-down direction (depth direction). In this case, for example, when the raw soil is stirred and mixed using a mixing device having multiple mixing bodies spaced apart in the vertical direction, depending on the location of the nozzle for spraying the solidification material, it may not be possible to add the solidification material uniformly to the raw soil. In other words, if the nozzle for spraying the solidification material is only provided on the bottom side of the mixing device, the solidification material will not be added to the upper raw soil when the mixing device is buried in the raw soil and mixed, and if the nozzle is only provided on the top side of the mixing device, the solidification material will not be added to the lower raw soil. In that case, in order to create a homogeneous solidified soil, the mixing device must be moved back and forth and up and down many times to mix and mix, which requires a lot of labor and time, making the work complicated. The present invention has been made in consideration of the above circumstances, and aims to provide a solidification material supplying device that can efficiently and uniformly add solidification material to raw soil, thereby improving the work efficiency of stirring and mixing, and creating homogeneous solidified soil. [Means for solving the problem]

[0005] In order to achieve the above-mentioned object, one embodiment of the present invention is a solidification material supplying device that supplies a solidification material to an agitation device that is installed in a self-propelled vehicle and adds a solidification material to raw soil and agitates and mixes the raw soil, the agitation device comprising a frame, an upper agitation body and a lower agitation body that are rotatably supported by the frame at a distance from each other in the vertical direction, an upper solidification material injection pipe that is installed between the upper agitation body and the lower agitation body and that injects the solidification material, and a lower solidification material injection pipe that is installed below the lower agitation body and that injects the solidification material, a solidification material tank that stores the solidification material, and a centrifuge that has one end connected to the solidification material tank and the other end connected to the upper solidification material injection pipe. and an external supply pipe connected to the lower solidification material injection pipe, a supply pump for supplying a predetermined constant flow rate of the solidification material from the solidification material tank to the upper solidification material injection pipe and the lower solidification material injection pipe via the external supply pipe, an upper adjustment valve provided on the external supply pipe for adjusting the amount of the solidification material supplied to the upper solidification material injection pipe, a lower adjustment valve provided on the external supply pipe for adjusting the amount of the solidification material supplied to the lower solidification material injection pipe, and a supply control unit for controlling the supply of the solidification material to the upper solidification material injection pipe and the lower solidification material injection pipe by starting the supply pump and controlling the upper adjustment valve and the lower adjustment valve. In addition, one embodiment of the present invention further includes an input receiving unit that receives instructions input from an operator, wherein the input receiving unit receives a pump start instruction to start the supply pump, and the supply control unit, when receiving the pump start instruction, starts the supply pump and begins supplying the solidification material, the input receiving unit receives a first supply instruction to supply the solidification material to the lower solidification material injection pipe after the supply pump is started, and when receiving the first supply instruction, the supply control unit controls the lower adjustment valve to supply a predetermined amount of the solidification material to the lower solidification material injection pipe, and the input receiving unit receives a second supply instruction to supply the solidification material to the upper solidification material injection pipe after the supply pump is started, and when receiving the second supply instruction, the supply control unit controls the upper adjustment valve to supply a predetermined amount of the solidification material to the upper solidification material injection pipe. In addition, one embodiment of the present invention is characterized in that when the supply control unit receives one of the first supply instruction and the second supply instruction after the supply pump is started, it supplies all of the solidification material supplied by the supply pump to one of the lower solidification material injection pipe and the upper solidification material injection pipe. In addition, one embodiment of the present invention is characterized in that when the supply control unit receives the first supply instruction and the second supply instruction after the supply pump is started, it distributes the solidification material supplied by the supply pump in a predetermined ratio and supplies it to the lower solidification material injection pipe and the upper solidification material injection pipe. In addition, one embodiment of the present invention is characterized in that the input receiving unit receives a pump stop instruction to stop the supply pump, and when the supply control unit receives the pump stop instruction, it stops the supply pump and stops the supply of the solidification material. In addition, one embodiment of the present invention further includes an input receiving unit that receives instructions inputted from an operator, the input receiving unit receiving a pump start instruction to start the supply pump, and when the supply control unit receives the pump start instruction, starts the supply pump and controls one of the lower adjustment valve and the upper adjustment valve to supply all of the solidification material supplied by the supply pump to one of the lower solidification material injection pipe and the upper solidification material injection pipe. In addition, one embodiment of the present invention is characterized in that after a predetermined time has elapsed since the supply pump is started, the supply control unit controls the lower adjustment valve and the upper adjustment valve to distribute the solidification material supplied by the supply pump in a predetermined ratio and supply it to the lower solidification material injection pipe and the upper solidification material injection pipe. In addition, one embodiment of the present invention is characterized in that when a required supply amount of the solidification material, which is a supply amount required for a predetermined stirring and mixing, has been supplied, the supply control unit stops the supply pump to stop the supply of the solidification material. Moreover, one embodiment of the present invention is characterized in that the frame has a pair of vertical frames that face each other and rotatably support both ends of the upper agitator and the lower agitator, the upper solidification material injection pipe and the lower solidification material injection pipe extend along the direction in which the pair of vertical frames face each other, the upper solidification material injection pipe is provided with a plurality of upper solidification material injection ports that inject the solidification material at intervals in its extension direction, and the lower solidification material injection pipe is provided with a plurality of lower solidification material injection ports that inject the solidification material at intervals in its extension direction. Effect of the Invention

[0006] According to one embodiment of the present invention, the mixing device includes an upper solidification material injection pipe provided between the upper mixing body and the lower mixing body, and a lower solidification material injection pipe provided below the lower mixing body. The solidification material supply device that supplies solidification material to the mixing device includes a supply pump that supplies a predetermined constant flow rate of solidification material from a solidification material tank to the upper solidification material injection pipe and the lower solidification material injection pipe via an external supply pipe, an upper adjustment valve that adjusts the amount of solidification material supplied to the upper solidification material injection pipe, a lower adjustment valve that adjusts the amount of solidification material supplied to the lower solidification material injection pipe, and a supply control unit that controls the supply of solidification material to the upper solidification material injection pipe and the lower solidification material injection pipe. This allows the solidification material to be added appropriately between the upper mixing body and the lower mixing body, and below the lower mixing body, so that the solidification material can be added efficiently and uniformly to the raw soil, which is advantageous for improving the work efficiency of mixing and stirring and creating homogeneous solidified soil. Furthermore, if the supply control unit is configured so that, when it receives a pump start instruction, it starts the supply pump and starts supplying solidification material, and when it receives a first supply instruction after the supply pump has been started, it supplies a predetermined amount of solidification material to the lower solidification material injection pipe, and when it receives a second supply instruction after the supply pump has been started, it supplies a predetermined amount of solidification material to the upper solidification material injection pipe.This makes it possible to supply solidification material to both the upper and lower solidification material injection pipes at the desired timing, which is advantageous for efficiently and uniformly adding solidification material to the raw soil in accordance with the operation of the mixing device. Furthermore, if the supply control unit receives one of the first supply instruction and the second supply instruction after starting the supply pump, it is configured to supply all of the solidification material supplied by the supply pump to one of the lower solidification material injection pipe and the upper solidification material injection pipe, which allows the solidification material to be supplied without stagnation, which is advantageous for efficiently adding the solidification material to the raw soil. Furthermore, if the supply control unit is configured to receive the first supply instruction and the second supply instruction after starting the supply pump and distribute the solidification material supplied by the supply pump at a predetermined ratio and supply it to the lower solidification material injection pipe and the upper solidification material injection pipe, the solidification material can be distributed and supplied at a predetermined ratio that matches the operation of the mixing device, which is advantageous for efficiently and uniformly adding the solidification material to the raw soil. In addition, if a pump stop instruction is received based on the operator's judgment that the required amount of solidification material, which is the supply amount necessary for predetermined stirring and mixing, has been supplied, the supply control unit can be configured to stop the supply pump and stop the supply of solidification material.This allows the operator to stop the supply of solidification material after understanding that the required amount of solidification material has been supplied, which is advantageous for efficiently adding solidification material to the raw soil. In addition, when the supply control unit receives a pump start instruction, it starts the supply pump and controls one of the lower adjustment valve and the upper adjustment valve to supply all of the solidification material supplied by the supply pump to one of the lower solidification material injection pipe and the upper solidification material injection pipe.This allows the solidification material to be supplied without any stagnation, which is advantageous for efficiently adding the solidification material to the raw soil. In addition, if the supply control unit is configured to control the lower adjustment valve and the upper adjustment valve after a predetermined time has elapsed since the supply pump is started, distribute the solidification material supplied by the supply pump at a predetermined ratio and supply it to the lower solidification material injection pipe and the upper solidification material injection pipe, the solidification material can be distributed and supplied at a predetermined ratio that matches the operation of the mixing device, which is advantageous for efficiently and uniformly adding the solidification material to the raw soil. Furthermore, if the supply control unit is configured to stop the supply of solidification material by stopping the supply pump when the required amount of solidification material, which is the predetermined amount needed for stirring and mixing, the supply of solidification material can be stopped even if the operator is not aware that the required amount of solidification material has been supplied, which is advantageous for efficiently adding an appropriate amount of solidification material to the raw soil. In addition, if multiple upper solidification material injection ports are provided at intervals in the extension direction of the upper solidification material injection pipe, and multiple lower solidification material injection ports are provided at intervals in the extension direction of the lower solidification material injection pipe, it is advantageous for uniformly adding and mixing the solidification material to the raw soil. [Brief description of the drawings]

[0007] [Figure 1] This is an overall configuration diagram showing the state in which the mixing device is swingably connected to the arm of the base machine to mix and stir the raw soil and solidification material. [Diagram 2] FIG. 2 is a front view showing a part of the stirring device in a cutaway view. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. 1 is a diagram showing a configuration of a solidifying material supplying device according to a first embodiment. [Figure 6] 4 is a flowchart showing an example of the flow of a solidification material supplying process according to the first embodiment. [Figure 7] FIG. 13 is a diagram showing a configuration of a solidifying material supplying device according to a second embodiment. [Figure 8] 13 is a flowchart showing an example of the flow of a solidification material supplying process according to the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] (First embodiment) Hereinafter, an embodiment of the present invention will be described with reference to FIGS. First, the stirring device 10 will be described. As shown in FIG. 1, the work vehicle 100 to which the mixing device 10 of this embodiment is attached has a swingable boom 104 provided on a base machine 102, which is a self-propelled vehicle, and an arm 106 swingably provided on the boom 104. The mixing device 10 of this embodiment is swingably connected to the arm 106 of the work vehicle 100, and mixes and stirs raw soil such as dredged soil to be used in the solidification process while adding solidification material, thereby creating solidified soil.

[0009] The mixing device 10 includes a support frame 12, a mixer 14, a drive motor 16, a solidification material injection pipe 18, a solidification material supply pipe 20, a pair of side cutters 22, and teeth 24. In this embodiment, the face of the mixing device 10 on the side of the base machine 102 will be referred to as the back face, and the face of the mixing device 10 opposite the base machine 102 will be referred to as the front face. Also, as shown in Fig. 1, the direction in which the base machine 102 is located (towards the self-propelled vehicle) as viewed from the mixing device 10 will be referred to as the rear (arrow R), and the direction opposite to the direction in which the base machine 102 is located (opposite to the self-propelled vehicle) will be referred to as the front (arrow F).

[0010] The support frame 12 is configured to include a pair of vertical frames 1202 made of steel material extending opposite each other, and a horizontal frame 1204 connecting the upper parts of the pair of vertical frames 1202. The vertical frames 1202 and the horizontal frames 1204 are hollow steel materials with rectangular cross sections, and have a sealed structure that prevents soil and water from entering, forming a closed cross-sectional structure that ensures strength and rigidity. The pair of vertical frames 1202 have their upper portions swingably connected to the tip of the arm 106 via a horizontal frame 1204. Specifically, a pair of plate-shaped connecting portions 1206 for connecting the stirrer 10 to the arm 106 are provided in the center of the horizontal frame 1204 in the longitudinal direction. The tip of the arm 106 is disposed between the pair of connecting portions 1206, and a connecting pin (not shown) is inserted between them, so that the support frame 12 is swingably and detachably connected to the tip of the arm 106.

[0011] The agitator 14 extends between a pair of vertical frames 1202 and is rotatably supported by the pair of vertical frames 1202, and is configured with an upper agitator 14A and a lower agitator 14B that are spaced apart vertically. The upper agitator 14A and the lower agitator 14B rotate with the agitator 10 pressed into the raw soil, thereby agitating and mixing the raw soil to which the solidification material has been added.

[0012] The upper stirring body 14A is provided extending between the middle parts of the pair of vertical frames 1202 in the extending direction. Specifically, the upper agitator 14A has an upper rotating shaft 1402A extending between the pair of vertical frames 1202 between the middle parts of the pair of vertical frames 1202 in the extension direction of the pair of vertical frames 1202, and both ends of the upper rotating shaft 1402A each penetrate the opposing side walls of the pair of vertical frames 1202 and are positioned inside the pair of vertical frames 1202. Both ends of the upper rotating shaft 1402A are rotatably supported by the pair of vertical frames 1202 via bearings 1404A and 1406A. The upper stirring body 14A is provided with a plurality of upper stirring blades 1408A which protrude from the outer periphery of the upper rotating shaft 1402A in a direction away from the outer periphery and are provided over the entire length of the upper rotating shaft 1402A. The upper agitating blades 1408A are chopper-type agitating blades that are excellent in uniformity of agitation, and are provided on the outer periphery of the upper rotating shaft 1402A at a predetermined angle θ1 with respect to the axis A of the upper rotating shaft 1402A.

[0013] The lower agitator 14B is provided extending between the lower parts of a pair of vertical frames 1202. Specifically, the lower agitator 14B has a lower rotating shaft 1402B extending between the pair of vertical frames 1202 between the lower portions of the pair of vertical frames 1202, and both ends of the lower rotating shaft 1402B penetrate opposing side walls of the pair of vertical frames 1202 and are positioned inside the pair of vertical frames 1202. Both ends of the lower rotating shaft 1402B are rotatably supported by the pair of vertical frames 1202 via bearings 1404B and 1406B. The lower stirring body 14B is provided with a plurality of lower stirring blades 1408B which protrude from the outer periphery of the lower rotating shaft 1402B in a direction away from the outer periphery and are provided over the entire length of the lower rotating shaft 1402B. The multiple lower stirring blades 1508B are paddle-type stirring blades having excellent durability, and are provided on the outer periphery of the lower rotating shaft 1402B at a predetermined angle θ2 with respect to the axis B of the lower rotating shaft 1402B. In this embodiment, the upper agitator 14A is configured with a chopper-type agitator blade, and the lower agitator 14B is configured with a paddle-type agitator blade, but it is possible to select an agitator blade of a shape appropriate for the material to be agitated, such as raw soil.

[0014] The drive motor 16 drives and rotates the agitator 14 which is rotatably supported by a pair of vertical frames 1202 of the support frame 12, and is configured to include an upper drive motor 16A and a lower drive motor 16B.

[0015] The upper drive motor 16A, which drives and rotates the upper agitator 14A, is composed of a hydraulic motor driven by hydraulic pressure from a hydraulic device provided in the base machine 102, and is housed in a housing 1602A with a sealed structure. The upper drive motor 16A including the housing 1602A is attached to one of the vertical frames 1202A by connecting the lower end of the housing 1602A and the upper end of the one of the vertical frames 1202A with a bolt B1. A drive sprocket 1604A is provided on the upper drive motor 16A, and a driven sprocket 1606A is provided on one end of the upper rotating shaft 1402A of the upper agitator 14A. A sprocket chain 1608A is wound around the drive sprocket 1604A and the driven sprocket 1606A, passing through the inside of the vertical frame 1202A. The upper drive motor 16A is configured so that hydraulic pressure from a hydraulic pump 30 installed on the base machine 102 is supplied via a forward / reverse switching circuit 32 consisting of a flow path switching valve and its operating unit, and a flow control circuit 34 consisting of a flow control valve and its operating unit.

[0016] The lower drive motor 16B drives and rotates the lower agitator 14B, and like the upper drive motor 16A, is composed of a hydraulic motor driven by hydraulic pressure from a hydraulic device provided in the base machine 102, and is housed in a sealed housing 1602B. The lower drive motor 16B including the housing 1602B is attached to the other vertical frame 1202B by connecting the lower end of the housing 1602B and the upper end of the other vertical frame 1202B with a bolt B2. The lower drive motor 16B is provided with a drive sprocket 1604B, and one end of the lower rotating shaft 1402B of the lower agitator 14B is provided with a driven sprocket 1606B. A sprocket chain 1608B is wound around the drive sprocket 1604B and the driven sprocket 1606B, passing through the inside of the vertical frame 1202B. The lower drive motor 16B is configured so that hydraulic pressure from a hydraulic pump 30 installed on the base machine 102 is supplied via a forward / reverse rotation switching circuit 36 ​​consisting of a flow path switching valve and its operating unit, and a flow control circuit 38 consisting of a flow rate adjustment valve and its operating unit.

[0017] The solidification material injection pipe 18 is used to inject the solidification material between a pair of vertical frames 1202, and is composed of an upper solidification material injection pipe 18A and a lower solidification material injection pipe 18B arranged at a distance above and below. When the raw soil is stirred and mixed with the mixing device 10 pressed into the raw soil, the upper solidification material injection pipe 18A and the lower solidification material injection pipe 18B inject the solidification material supplied through the solidification material supply pipe 20 described later into the raw soil.

[0018] The upper solidification material injection pipe 18A is supported by a cantilever on one of the pair of vertical frames 1202A, and extends between the upper agitator 14A and the lower agitator 14B along the direction in which the pair of vertical frames 1202 face each other (the extension direction of the horizontal frame 1204). The upper solidification material injection pipe 18A is provided with a plurality of upper solidification material injection ports 1802A that inject the solidification material at intervals in the extension direction. In this embodiment, three upper solidification material injection ports 1802A are provided at predetermined intervals. By the upper solidification material injection pipe 18A configured in this manner, the solidification material supplied from the upper solidification material supply pipe 20A described later is injected from multiple locations spaced apart in the extension direction of the upper solidification material injection pipe 18A between the upper stirrer 14A and the lower stirrer 14B.

[0019] The lower solidification material injection pipe 18B is supported on the upper surface of the teeth 24 described later, and is provided below the lower agitator 14B, extending along the direction in which a pair of vertical frames 1202 face each other (the extension direction of the horizontal frame 1204). The lower solidifying material injection pipe 18B is provided with a plurality of lower solidifying material injection ports 1802B for injecting the solidifying material at intervals in the extending direction. In this embodiment, similar to the upper solidifying material jetting pipe 18A, three lower solidifying material jetting ports 1802B are provided at predetermined intervals. By using the lower solidification material injection pipe 18B configured in this manner, the solidification material supplied from the lower solidification material supply pipe 20B described later is injected from multiple locations spaced apart in the extension direction of the lower solidification material injection pipe 18B below the lower agitator 14B, i.e., below the agitation device 10.

[0020] The solidification material supply pipe 20 supplies the solidification material supplied by the solidification material supply device 50 described later to the solidification material injection pipe 18 (upper solidification material injection pipe 18A and lower solidification material injection pipe 18B), and is composed of an upper solidification material supply pipe 20A and a lower solidification material supply pipe 20B. The upper solidification material supply pipe 20A is disposed along the one vertical frame 1202A on the front side of the one vertical frame 1202A and is supported by the one vertical frame 1202A. One end of the upper solidification material supply pipe 20A is connected to the upper solidification material injection pipe 18A, and the other end is connected to a solidification material tank 52 (described later) that stores the solidification material via an upper branch supply pipe 64A (described later) and a main supply pipe 62 (described later) of the solidification material supply device 50 provided outside the vertical frame 1202A. The lower solidification material supply pipe 20B is disposed along the other vertical frame 1202B on the front side of the other vertical frame 1202B and is supported by the other vertical frame 1202B. One end of the lower solidification material supply pipe 20B is connected to the lower solidification material injection pipe 18B, and the other end is connected to the solidification material tank 52 (described later) via a lower branch supply pipe 64B (described later) and a main supply pipe 62 (described later) of the solidification material supply device 50 provided outside the vertical frame 1202B.

[0021] The pair of side cutters 22 are plate-shaped members for excavating raw soil, and are provided at the lower ends of the pair of vertical frames 1202, respectively, as shown in FIG. The pair of side cutters 22 are provided at the lower ends of the pair of vertical frames 1202 facing the base machine 102 with the pair of vertical frames 1202 of the mixing device 10 extended in the vertical direction, and extend along the extension direction of the pair of vertical frames 1202. That is, as shown in Figures 3 and 4, a pair of side cutters 22 are provided, with side cutter 22A at the lower end of the back surface of one vertical frame 1202A and side cutter 22B at the lower end of the back surface of the other vertical frame 1202B, and each extending along the extension direction of the pair of vertical frames 1202. The pair of side cutters 22 are attached to the pair of vertical frames 1202, respectively, by bolts (not shown). When the mixing device 10 is moved backward toward the self-propelled vehicle (toward the base machine 102) while maintaining the pair of vertical frames 1202 extended in the vertical direction, the pair of side cutters 22 move in a direction along the plate-shaped surface, and the end portion 2202 (see Figure 3) located on the base machine 102 side excavates and loosens the raw soil. In addition, if the ends of the pair of side cutters 22 become chipped, damaged, or bent due to repeated excavation of the raw soil, it is possible to loosen the bolts and remove them, and then install new side cutters 22. The pair of side cutters 22 in this embodiment are formed in a plate shape having a predetermined length along the extending direction of the pair of vertical frames 1202, but various known shapes can be applied.

[0022] The teeth 24 are plate-shaped members used to excavate raw soil, and as shown in Figures 2 and 3, are provided below the pair of side cutters 22, extending along the direction in which the pair of vertical frames 1202 face each other (the extension direction of the horizontal frame 1204). The teeth 24 are inclined so that, when the pair of vertical frames 1202 of the mixing device 10 are extended in the vertical direction, the rear end 2402 located on the base machine 102 side is positioned lower than the front end 2404. Moreover, the teeth 24 are attached to a pair of vertical frames 1202 by bolts (not shown). When the mixing device 10 is moved rearward toward the self-propelled vehicle (toward the base machine 102) while maintaining the pair of vertical frames 1202 extended in the vertical direction, the teeth 24 move in a direction perpendicular to the extension direction and excavate and loosen the raw soil with the rear end 2402. Also, like the pair of side cutters 22, if the ends of the teeth 24 become chipped, damaged, or bent due to repeated excavation of the raw soil, it is possible to loosen the bolts and remove the teeth 24, and then install new teeth 24. The teeth 24 in this embodiment are plate-like members extending in the direction in which the pair of vertical frames 1202 face each other (the extension direction of the horizontal frame 1204), but various known shapes are applicable. For example, the teeth 24 may be configured such that multiple claws with tapered tips are provided at predetermined intervals in the extension direction of the teeth 24.

[0023] Next, the solidifying material supplying device 50 of this embodiment will be described. The solidification material supplying device 50 controls the supply of solidification material to the mixing device 10, and as shown in FIG. 5, is configured to include a solidification material tank 52, a supply pump 54, a main supply pipe 62, an upper branch supply pipe 64A, a lower branch supply pipe 64B, an upper adjustment valve 56A, a lower adjustment valve 56B, and a solidification material control device 200A. In the solidifying material supplying device 50, an external supply pipe 60 is formed by a main supply pipe 62, an upper branch supply pipe 64A, and a lower branch supply pipe 64B. In addition, the solidification material control device 200A has a hardware configuration that utilizes a normal computer, including a control device such as a CPU (Central Processing Unit), a storage device such as a ROM (Read Only Memory) for storing a control program and a RAM (Random Access Memory) as the operating area for the control program, an output device, an input device, and a communication I / F (interface) for communicating with external devices, etc., and by the CPU executing the control program stored in the ROM, it functions as an input receiving unit 202 and a supply control unit 204, as shown in Figure 4.

[0024] The solidifying material tank 52 is a container for storing the solidifying material to be supplied to the mixing device 10, and is provided in the base machine 102. The supply pump 54 supplies the solidification material stored in the solidification material tank 52 at a predetermined constant flow rate to the upper solidification material injection pipe 18A and the lower solidification material injection pipe 18B via the external supply pipe 60 (main supply pipe 62, upper branch supply pipe 64A, lower branch supply pipe 64B), the upper solidification material supply pipe 20A, and the lower solidification material supply pipe 20B. The flow rate of the solidification material supplied by the supply pump 54 is the amount of solidification material flowing per unit time, and is, for example, the volume V (m 3 ) The flow rate of the solidification material can be set to a desired amount in advance, but is not changed during the solidification treatment operation using the agitator 10 and is maintained at a constant flow rate. In addition, the amount of solidification material supplied to the raw soil per unit volume of the raw soil is fixed, and when mixing and stirring using the mixing device 10, the amount of material supplied (required amount of material supplied) required for mixing and stirring is determined in advance. In this embodiment, the supply pump 54 is started under the control of the supply control unit 204 to start supplying the solidification material, and is stopped under the control of the supply control unit 204 to stop supplying the solidification material.

[0025] The main supply pipe 62 is a pipe for supplying the solidification material, and its upstream end (one end) is connected to the inside of the solidification material tank 52 via the supply pump 54, and its downstream end (the other end) is branched and connected to the upper adjustment valve 56A and the lower adjustment valve 56B. The upper branch supply pipe 64A, like the main supply pipe 62, is a pipe for supplying solidification material, with its upstream end connected to the upper regulating valve 56A and its downstream end connected to the upper solidification material supply pipe 20A. The lower branch supply pipe 64B, like the main supply pipe 62, is a pipe for supplying solidification material, and its upstream end is connected to the lower adjustment valve 56B and its downstream end is connected to the lower solidification material supply pipe 20B. Therefore, the external supply pipe 60 composed of the main supply pipe 62, the upper branch supply pipe 64A, and the lower branch supply pipe 64B has its upstream end connected to the solidification material tank 52, and its downstream end connected to the upper solidification material injection pipe 18A and the lower solidification material injection pipe 18B via the upper solidification material supply pipe 20A and the lower solidification material supply pipe 20B.

[0026] The upper regulating valve 56A is a valve provided on the external supply pipe 60 and serves to regulate the amount of solidifying material supplied to the upper solidifying material injection pipe 18A. In this embodiment, the upper adjustment valve 56A is provided between the main supply pipe 62 and the upper branch supply pipe 64A that constitute the external supply pipe 60, and adjusts the amount of solidification material supplied from the solidification material tank 52 and supplied to the upper solidification material injection pipe 18A via the external supply pipe 60 and the upper solidification material supply pipe 20A. The lower adjustment valve 56B is a valve provided in the external supply pipe 60 and adjusts the amount of solidification material supplied to the lower solidification material injection pipe 18B. In this embodiment, the lower adjustment valve 56B is provided between the main supply pipe 62 and the lower branch supply pipe 64B that constitute the external supply pipe 60, and adjusts the amount of solidification material supplied from the solidification material tank 52 and supplied to the lower solidification material injection pipe 18B via the external supply pipe 60 and the lower solidification material supply pipe 20B. As such a regulating valve, various known flow rate regulating valves capable of controlling the flow rate using an electric, pneumatic, or hydraulic actuator can be used. In addition, the "supply amount of solidification material" in this embodiment refers to the supply amount of solidification material per unit time, for example, the volume V (m 3 ) refers to

[0027] The input receiving unit 202 receives instructions input by an operator via the input device 206, and in this embodiment receives instructions relating to the supply of the solidifying material. That is, the input receiving unit 202 receives a pump start instruction to start the supply pump 54. In addition, after the supply pump 54 is started, the input receiving unit 202 receives a first supply instruction to supply solidification material to the lower solidification material injection pipe 18B and a second supply instruction to supply solidification material to the upper solidification material injection pipe 18A. In addition, the input receiving unit 202 receives a pump stop instruction to stop the supply pump 54 based on an input operation made by the operator when the operator determines that the required supply amount of solidification material, which is the supply amount required for a predetermined stirring and mixing, has been supplied. The input device 206 may be anything that accepts input operations by the worker, and may be, for example, a terminal such as a laptop or tablet, or a dedicated operation console provided with operating members such as operation switches and operation levers.

[0028] Based on input instructions regarding the supply of solidification material received by the input receiving unit 202, the supply control unit 204 starts the supply pump 54 and controls the upper adjustment valve 56A and the lower adjustment valve 56B to start and stop the supply of solidification material to the upper solidification material injection pipe 18A and the lower solidification material injection pipe 18B, and to control the amount of solidification material supplied. That is, when the supply control unit 204 receives a pump start instruction from the input receiving unit 202, it starts the supply pump 54 and starts supplying the solidification material stored in the solidification material tank 52. Furthermore, when the supply control unit 204 receives a first supply instruction from the input receiving unit 202, it controls the lower regulating valve 56B to supply a predetermined amount of solidification material to the lower solidification material injection pipe 18B. Furthermore, when the supply control unit 204 receives a second supply instruction from the input receiving unit 202, it controls the upper regulating valve 56A to supply a predetermined amount of solidification material to the upper solidification material injection pipe 18A.

[0029] When the supply control unit 204 receives one of the first supply instruction and the second supply instruction after the supply pump 54 is started, it supplies all of the solidification material supplied by the supply pump 54 to one of the lower solidification material injection pipe 18B and the upper solidification material injection pipe 18A. In this embodiment, after the supply pump 54 is started, the solidification material is first supplied to the lower solidification material injection pipe 18B. Therefore, after the supply pump 54 is started, the supply control unit 204 receives the first supply instruction and opens the lower adjustment valve 56B, thereby supplying all of the solidification material supplied by the supply pump 54 to the lower solidification material injection pipe 18B.

[0030] In addition, when the supply control unit 204 receives a first supply instruction and a second supply instruction after the supply pump 54 is started, it distributes the solidification material supplied by the supply pump 54 at a predetermined ratio and supplies it to the lower solidification material injection pipe 18B and the upper solidification material injection pipe 18A. In this embodiment, after the supply pump 54 is started, the solidification material is first supplied to the lower solidification material injection pipe 18B, and then the solidification material is supplied to the lower solidification material injection pipe 18B and the upper solidification material injection pipe 18A. Therefore, after the supply pump 54 is started and solidification material is supplied to the lower solidification material injection pipe 18B, the supply control unit 204 accepts a second supply instruction in addition to the first supply instruction, and opens the valve of the lower adjustment valve 56B and the valve of the upper adjustment valve 56A at a predetermined ratio, thereby distributing the solidification material supplied by the supply pump 54 at a predetermined ratio and supplying it to the lower solidification material injection pipe 18B and the upper solidification material injection pipe 18A. Here, the predetermined ratio of the solidification material to be distributed to the lower solidification material injection pipe 18B and the upper solidification material injection pipe 18A can be determined in advance in accordance with the operation of the agitation device 10. Therefore, the supply control unit 204 controls the valves of the lower adjustment valve 56B and the upper adjustment valve 56A in accordance with the determined ratio, thereby distributing the supply amount of the solidification material at a predetermined ratio. The ratio of solidification material to be distributed may be determined experimentally by conducting experiments in which different amounts of solidification material are mixed with the raw soil to be solidified, or it may be determined arbitrarily based on the results of an analysis of the composition and properties of the raw soil to be solidified. Furthermore, when the supply control unit 204 receives a pump stop instruction from the input receiving unit 202, it stops the supply pump 54 to stop the supply of the solidification material.

[0031] Next, with reference to FIG. 6, an example of the flow of a process of supplying the solidifying material to the agitator 10 by the solidifying material supplying device 50 according to this embodiment will be described. Below, an example of a solidification material supply process will be described in which, after the supply pump 54 is started, solidification material is first supplied to the lower solidification material injection pipe 18B, and then solidification material is supplied to the lower solidification material injection pipe 18B and the upper solidification material injection pipe 18A. However, the order of the solidification material supply process can be appropriately determined depending on the solidification process operation by the stirring device 10.

[0032] First, the supply control unit 204 determines whether or not a pump start instruction has been received by the input receiving unit 202 (step S10). If a pump start instruction has been received (step S10: YES), the supply control unit 204 starts the supply pump 54 and supplies the solidification material to the main supply pipe 62 (step S12). On the other hand, if the pump start instruction has not been received (step S10: NO), the process waits until it is received.

[0033] Next, the supply control unit 204 judges whether or not the first supply instruction is received by the input receiving unit 202 (step S14). If the first supply instruction is received (step S14: YES), the supply control unit 204 controls the lower adjustment valve 56B to supply all of the solidification material supplied from the supply pump 54 through the main supply pipe 62 to the lower solidification material injection pipe 18B through the lower branch supply pipe 64B and the lower solidification material supply pipe 20B (step S16). On the other hand, if the first supply instruction has not been received (step S14: NO), the process waits until the first supply instruction is received.

[0034] Next, the supply control unit 204 judges whether or not the input receiving unit 202 has received a second supply instruction (step S18). When the second supply instruction has been received (step S18: YES), the supply control unit 204 controls the lower adjustment valve 56B and the upper adjustment valve 56A to distribute the solidification material supplied from the supply pump 54 through the main supply pipe 62 at a predetermined ratio, and supplies it to the lower solidification material injection pipe 18B through the lower branch supply pipe 64B and the lower solidification material supply pipe 20B, and supplies it to the upper solidification material injection pipe 18A through the upper branch supply pipe 64A and the upper solidification material supply pipe 20A (step S20). On the other hand, if the second supply instruction has not been received (step S18: NO), the process waits until the second supply instruction is received.

[0035] Then, when the worker determines that the necessary amount of solidification material has been supplied to the raw soil (step S22), he / she inputs a pump stop command to the input receiving unit 202. The worker can determine that the necessary amount of solidification material has been supplied based on, for example, the elapsed time since the supply pump 54 was started. Alternatively, the worker can determine that the necessary amount of solidification material has been supplied based on the operating state of the supply pump 54. Next, the supply control unit 204 determines whether or not a pump stop instruction has been received from the input receiving unit 202 (step S24). If a pump stop instruction has been received (step S24: YES), the supply control unit 204 stops the supply pump 54 (step S26) and stops the supply of the solidification material (step S28). On the other hand, if the pump stop instruction has not been received (step S24: NO), the process waits until it is received.

[0036] Such a solidification material supply process is used when performing a solidification process operation by the mixing device 10. For example, in the case of a solidification process in which a cement-based solidification material is added to raw soil such as mud and earth and sand accumulated in a reservoir while being mixed and stirred to produce solidified soil, a solidification pit S having a depth D (e.g., D=2.5 m) and a width W (e.g., W=4.0 m) is constructed as shown in Fig. 1, and raw soil such as mud and earth and sand excavated from the bottom of the reservoir is poured into it. Then, the mixer 10 is inserted into the raw soil in the solidification pit S by the boom 104 and arm 106 of the base machine 102, and the raw soil and the solidification material are mixed while being added. For example, the mixer 10 is moved up and down at the location shown by the solid line in Fig. 1 to mix and mix the raw soil and the solidification material, and the mixer 10 is moved up and down each time it moves a predetermined distance from this mixing location to the location shown by the two-dot chain line in Fig. 1 to mix and mix the raw soil and the solidification material. However, when raw soil that is too hard for the mixing device 10 to easily compress is solidified using the mixing device 10, the solidification process will proceed as follows. The following describes the case where the solidification material supply process of this embodiment is applied to this process. The solidification treatment operation by the agitation device 10 described below is merely an example, and is not limited to this, and the operation can be performed according to the state and circumstances of the raw soil.

[0037] First, the base machine 102 is moved close to the raw soil to be solidified, and the mixing device 10 connected to the tip of the arm 106 is held in a suspended state above the raw soil with a pair of vertical frames 1202 extended in the vertical direction. Next, the agitator 14 is rotated while the pair of vertical frames 1202 are maintained in an extended position in the vertical direction, and the agitator 10 is moved in the direction of the self-propelled vehicle, thereby excavating the raw soil with the side cutter 22 and teeth 24.

[0038] Then, with the agitator 10 pressed into the excavated raw soil, a solidification material is sprayed from the solidification material spray pipe 18, whereby the agitator 14 mixes the solidification material and the raw soil. Specifically, the mixing device 10 is pushed into the excavated and loosened raw soil, and when the lower mixing body 14B is pushed into the raw soil and an instruction to start the pump is received from the operator, the supply pump 54 of the solidification material supply device 50 is started and the solidification material is supplied to the main supply pipe 62. Next, when the first supply instruction is received from the operator, the lower adjustment valve 56B is controlled to supply all of the solidification material to the lower solidification material injection pipe 18B via the lower branch supply pipe 64B and the lower solidification material supply pipe 20B, and the solidification material from each lower solidification material injection port 1802B is injected downward toward the lower agitator 14B. Then, the lower agitator 14B agitates and mixes the raw soil and the solidification material injected from the lower solidification material injection port 1802B.

[0039] Furthermore, when the upper agitator 14A is pushed into the excavated and loosened raw soil and a second supply instruction is received from the operator, the lower adjustment valve 56B and the upper adjustment valve 56A are controlled to supply solidification material to the lower solidification material injection pipe 18B via the lower branch supply pipe 64B and the lower solidification material supply pipe 20B, and to supply solidification material to the upper solidification material injection pipe 18A via the upper branch supply pipe 64A and the upper solidification material supply pipe 20A, and to spray solidification material from the upper solidification material injection port 1802A and the lower solidification material injection port 1802B, respectively. At this time, the solidification material is distributed at a predetermined ratio and supplied to the lower solidification material injection pipe 18B and the upper solidification material injection pipe 18A. Then, the upper agitator 14A further agitates and mixes the mixture of raw soil and solidification material agitated and mixed by the lower agitator 14B with the solidification material injected from the upper solidification material injection port 1802A.

[0040] When the raw soil is loosened and mixed to the extent that the entire mixing device 10 can be pushed into it, the raw soil is further mixed with the solidifying material until it is uniformly mixed therein. That is, for example, the boom 104 and arm 106 of the base machine 102 are used to repeatedly move the mixing device 10 up and down in the raw soil and move the mixing device 10 forward and backward. Then, when the required amount of solidification material is supplied and a pump stop command is received from the operator, the supply pump 54 of the solidification material supply device 50 is stopped, and the supply of the solidification material is stopped. When the solidification process by the agitator 10 is completed, the boom 104 and the arm 106 are operated to raise the agitator 10 and complete the process.

[0041] Here, the direction and speed of rotation of the lower agitator 14B and the upper agitator 14A are changed depending on the soil properties of the raw soil to be agitated and mixed. That is, the rotation direction of the lower agitator 14B is changed by switching the forward / reverse switching circuit 36 ​​to the forward or reverse side. The rotation speed of the lower agitator 14B is adjusted by operating the flow control circuit 38 to control the hydraulic flow rate to the lower drive motor 16B. The rotation direction of the upper agitator 14A is changed by switching the forward / reverse switching circuit 32 to the forward or reverse side. The rotation speed of the upper agitator 14A is adjusted by operating the flow control circuit 38 to control the hydraulic flow rate to the upper drive motor 16A.

[0042] According to the solidification material supplying device 50 of this embodiment, the agitation device 10 includes an upper solidification material injection pipe 18A provided between the upper agitation body 14A and the lower agitation body 14B, and a lower solidification material injection pipe 18B provided below the lower agitation body 14B. The solidification material supplying device 50 that supplies the solidification material to the agitation device 10 includes a supply pump 54 that supplies a predetermined constant flow rate of solidification material from a solidification material tank 52 to the upper solidification material injection pipe 18A and the lower solidification material injection pipe 18B via an external supply pipe 60, and a supply pump 55 that supplies a predetermined constant flow rate of solidification material from the solidification material tank 52 to the upper solidification material injection pipe 18A and the lower solidification material injection pipe 18B via an external supply pipe 60. By providing an upper adjustment valve 56A which adjusts the amount of solidification material supplied to 8A, a lower adjustment valve 56B which adjusts the amount of solidification material supplied to the lower solidification material injection pipe 18B, and a supply control unit 204 which controls the supply of solidification material to the upper solidification material injection pipe 18A and the lower solidification material injection pipe 18B, solidification material can be added appropriately between the upper agitator 14A and the lower agitator 14B, and below the lower agitator 14B, which is advantageous in that the solidification material can be added efficiently and uniformly to the raw soil, improving the work efficiency of mixing and stirring, and creating homogeneous solidified soil. In addition, when the supply control unit 204 receives a pump start instruction, it starts the supply pump 54 and starts supplying solidification material, and when a first supply instruction is received after the supply pump 54 has been started, it supplies a predetermined amount of solidification material to the lower solidification material injection pipe 18B, and when a second supply instruction is received after the supply pump 54 has been started, it supplies a predetermined amount of solidification material to the upper solidification material injection pipe 18A.This makes it possible to supply solidification material to the upper solidification material injection pipe 18A and the lower solidification material injection pipe 18B at the desired timing, which is advantageous for efficiently and uniformly adding solidification material to the raw soil in accordance with the operation of the mixing device 10. Furthermore, when the supply control unit 204 receives either the first supply instruction or the second supply instruction after starting the supply pump 54, all of the solidification material supplied by the supply pump 54 is supplied to either the lower solidification material injection pipe 18B or the upper solidification material injection pipe 18A, so that the solidification material can be supplied without stagnation, which is advantageous for efficiently adding the solidification material to the raw soil. Furthermore, when the supply control unit 204 receives the first supply instruction and the second supply instruction after starting the supply pump 54, the solidification material supplied by the supply pump 54 is distributed at a predetermined ratio and supplied to the lower solidification material injection pipe 18B and the upper solidification material injection pipe 18A. This allows the solidification material to be distributed and supplied at a predetermined ratio in accordance with the operation of the mixing device 10, which is advantageous for efficiently and uniformly adding the solidification material to the raw soil. In addition, when a pump stop instruction is received based on the operator's judgment that the required amount of solidification material, which is the supply amount necessary for predetermined stirring and mixing, has been supplied, the supply control unit 204 stops the supply pump 54 and stops the supply of solidification material.This allows the operator to stop the supply of solidification material after understanding that the required amount of solidification material has been supplied, which is advantageous for efficiently adding solidification material to the raw soil. In addition, multiple upper solidification material injection ports 1802A are provided at intervals in the extension direction of the upper solidification material injection pipe 18A, and multiple lower solidification material injection ports 1802B are provided at intervals in the extension direction of the lower solidification material injection pipe 18B, which is advantageous in adding and mixing the solidification material uniformly to the raw soil.

[0043] (Second embodiment) In the first embodiment, the supply of solidification material was started and stopped, and the amount of solidification material supplied was controlled based on instructions from the operator, whereas in the second embodiment, after the supply pump is started and the supply of solidification material begins, the amount of solidification material supplied is controlled or stopped based on the passage of time, which is a difference. In the following description of the embodiment, the same parts and members as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted, and the description will focus on the parts that are different from the first embodiment. Moreover, the work vehicle 100 and the agitation device 10 are similar to those in the first embodiment.

[0044] Next, the solidifying material supplying device 50 of this embodiment will be described. The solidification material supplying device 50 controls the supply of solidification material to the mixing device 10, and as shown in FIG. 7, is configured with a solidification material tank 52, a supply pump 54, a main supply pipe 62, an upper branch supply pipe 64A, a lower branch supply pipe 64B, an upper adjustment valve 56A, a lower adjustment valve 56B, an upper rotation sensor 58A, a lower rotation sensor 58B, and a solidification material control device 200B. In the solidifying material supplying device 50, similarly to the first embodiment, the external supply pipe 60 is configured by the main supply pipe 62, the upper branch supply pipe 64A, and the lower branch supply pipe 64B. In addition, the solidification material control device 200B has a hardware configuration that utilizes a normal computer, similar to the first embodiment, and functions as an input receiving unit 212, a timing unit 214, and a supply control unit 216, as shown in Figure 7, by the CPU executing a control program stored in the ROM. Here, the functions and configurations of the solidification material tank 52, supply pump 54, main supply pipe 62, upper branch supply pipe 64A, lower branch supply pipe 64B, upper adjustment valve 56A, and lower adjustment valve 56B are the same as those in the first embodiment.

[0045] The input receiving unit 212 receives instructions input by the operator via the input device 206, and in this embodiment receives instructions relating to the supply of the solidifying material. That is, the input receiving unit 212 receives a pump start instruction to start the supply pump 54. The timer 214 starts timing when the supply pump 54 is started by the supply control unit 216. In the present embodiment, the supply control unit 216 determines the passage of a predetermined time based on the time measured by the timer 214, and controls the supply of the solidification material.

[0046] When the supply control unit 216 receives a pump start instruction from the input receiving unit 212, it starts the supply pump 54 and controls one of the lower adjustment valve 56B and the upper adjustment valve 56A to supply all of the solidification material supplied by the supply pump 54 to one of the lower solidification material injection pipe 18B and the upper solidification material injection pipe 18A. In this embodiment, after the supply pump 54 is started, the solidification material is first supplied to the lower solidification material injection pipe 18B to perform the solidification treatment operation. Therefore, when the supply pump 54 is started, the supply control unit 216 opens the lower adjustment valve 56B, thereby supplying all of the solidification material supplied by the supply pump 54 to the lower solidification material injection pipe 18B.

[0047] In addition, after a predetermined time has elapsed since the supply pump 54 was started, the supply control unit 216 controls the lower adjustment valve 56B and the upper adjustment valve 56A to distribute the solidification material supplied by the supply pump 54 at a predetermined ratio and supply it to the lower solidification material injection pipe 18B and the upper solidification material injection pipe 18A. In this embodiment, after the supply pump 54 is started, the solidification material is first supplied to the lower solidification material injection pipe 18B, and then the solidification material is supplied to the lower solidification material injection pipe 18B and the upper solidification material injection pipe 18A to perform the solidification treatment operation. Therefore, when a predetermined time has elapsed since the supply pump 54 was started, the supply control unit 216 opens the valve of the lower adjustment valve 56B and the valve of the upper adjustment valve 56A at a predetermined ratio, thereby distributing the solidification material supplied by the supply pump 54 at a predetermined ratio and supplying it to the lower solidification material injection pipe 18B and the upper solidification material injection pipe 18A. The predetermined ratio of the solidifying material is the same as in the first embodiment. Furthermore, when a required supply amount of solidification material, which is a supply amount required for a predetermined stirring and mixing, has been supplied, the supply control unit 216 stops the supply pump 54 to stop the supply of the solidification material.

[0048] Next, with reference to FIG. 8, an example of the flow of a process of supplying the solidifying material to the agitator 10 by the solidifying material supplying device 50 according to this embodiment will be described. First, the supply control unit 216 determines whether or not a pump start instruction has been received by the input receiving unit 212 (step S40). If a pump start instruction has been received (step S40: YES), the supply control unit 216 starts the supply pump 54 and supplies the solidification material to the main supply pipe 62 (step S42). On the other hand, if the pump start instruction has not been received (step S40: NO), the process waits until it is received.

[0049] When the supply pump 54 is started, the supply control unit 204 controls the lower adjustment valve 56B to supply all of the solidification material supplied from the supply pump 54 through the main supply pipe 62 to the lower solidification material injection pipe 18B via the lower branch supply pipe 64B and the lower solidification material supply pipe 20B (step S44). Next, the supply control unit 216 determines whether a predetermined time has elapsed since the supply pump 54 was started based on the timing by the timing unit 214 (step S46), and if the predetermined time has not elapsed (step S46: NO), returns to step S44.

[0050] On the other hand, if the predetermined time has elapsed (step S46: YES), the supply control unit 216 controls the lower adjustment valve 56B and the upper adjustment valve 56A to distribute the solidification material supplied from the supply pump 54 at a predetermined ratio, and supply it to the lower solidification material injection pipe 18B via the lower branch supply pipe 64B and the lower solidification material supply pipe 20B, and to the upper solidification material injection pipe 18A via the upper branch supply pipe 64A and the upper solidification material supply pipe 20A (step S48).

[0051] Then, the supply control unit 216 determines whether the required amount of solidification material has been supplied to the raw soil (step S50), and if the required amount of solidification material has not been supplied (step S50: NO), waits until the required amount of solidification material has been supplied. On the other hand, if the necessary amount of solidification material has been supplied (step S50: YES), the supply control unit 204 stops the supply pump 54 (step S52) and stops the supply of the solidification material (step S54).

[0052] According to the solidification material supplying device 50 of this embodiment, the agitation device 10 includes an upper solidification material injection pipe 18A provided between the upper agitation body 14A and the lower agitation body 14B, and a lower solidification material injection pipe 18B provided below the lower agitation body 14B. The solidification material supplying device 50 that supplies the solidification material to the agitation device 10 includes a supply pump 54 that supplies a predetermined constant flow rate of solidification material from a solidification material tank 52 to the upper solidification material injection pipe 18A and the lower solidification material injection pipe 18B via an external supply pipe 60, and a supply pump 55 that supplies a predetermined constant flow rate of solidification material from the solidification material tank 52 to the upper solidification material injection pipe 18A and the lower solidification material injection pipe 18B via an external supply pipe 60. By providing an upper adjustment valve 56A which adjusts the amount of solidification material supplied to 8A, a lower adjustment valve 56B which adjusts the amount of solidification material supplied to the lower solidification material injection pipe 18B, and a supply control unit 216 which controls the supply of solidification material to the upper solidification material injection pipe 18A and the lower solidification material injection pipe 18B, solidification material can be added appropriately between the upper agitator 14A and the lower agitator 14B, and below the lower agitator 14B, which is advantageous in that the solidification material can be added efficiently and uniformly to the raw soil, improving the work efficiency of mixing and stirring, and creating homogeneous solidified soil. In addition, when the supply control unit 216 receives a pump start instruction, it starts the supply pump 54 and controls one of the lower adjustment valve 56B and the upper adjustment valve 56A to supply all of the solidification material supplied by the supply pump 54 to one of the lower solidification material injection pipe 18B and the upper solidification material injection pipe 18A.This allows the solidification material to be supplied without any stagnation, which is advantageous for efficiently adding the solidification material to the raw soil. In addition, after a predetermined time has elapsed since the supply pump 54 is started, the supply control unit 216 controls the other of the lower adjustment valve 56B and the upper adjustment valve 56A to distribute the solidification material supplied by the supply pump 54 at a predetermined ratio and supply it to the lower solidification material injection pipe 18B and the upper solidification material injection pipe 18A.This allows the solidification material to be distributed and supplied at a predetermined ratio in accordance with the operation of the mixing device 10, which is advantageous for efficiently and uniformly adding the solidification material to the raw soil. In addition, when the supply control unit 216 has supplied the required amount of solidification material, which is the supply amount necessary for a predetermined stirring and mixing, it is configured to stop the supply of solidification material by stopping the supply pump 54. Therefore, even if the operator is not aware that the required amount of solidification material has been supplied, the supply of solidification material can be stopped, which is advantageous for efficiently adding an appropriate amount of solidification material to the raw soil.

[0053] In the first and second embodiments, the external supply pipe 60 of the solidification material supply device 50 is configured to include a main supply pipe 62, and an upper branch supply pipe 64A and a lower branch supply pipe 64B branching off from the main supply pipe 62, but the external supply section may be configured with two supply pipes, a first supply pipe connecting the upper solidification material supply pipe 20A and the solidification material tank 52, and a second supply pipe connecting the lower solidification material supply pipe 20B and the solidification material tank 52. [Explanation of symbols]

[0054] 10 Mixing device 12 Support frame 1202 Pair of vertical frames 1204 Horizontal Frame 14 Agitator 14A Upper agitator 14B Lower agitator 16 Drive motor 16A upper drive motor 16B Lower drive motor 18 Solidifying agent injection pipe 18A Upper solidifying agent injection pipe 1802A Upper solidifying agent injection port 18B Lower solidifying material injection pipe 1802B Lower solidification material injection port 20 Solidifying material supply pipe 20A Upper solidifying material supply pipe 20B Lower solidification material supply pipe 22(22A, 22B) Side cutter 24 Two 52 Solidification tank 54 Supply Pump 56A Upper Adjustment Valve 56B Lower Adjustment Valve 58A Upper rotation sensor 58B Lower rotation sensor 60 External supply pipe 62 Main supply pipe 64A Upper branch supply pipe 64B Lower branch supply pipe 200A, 200B Solidification material control device 202, 212 Input reception unit 204, 216 Supply control section 206 Input Device 214 Timing section

Claims

1. A solidification material supplying device that is provided on a self-propelled vehicle and supplies a solidification material to a mixing device that adds a solidification material to raw soil and mixes it, The stirring device includes a frame, an upper stirring body and a lower stirring body rotatably supported by the frame at a vertical interval, an upper solidification material injection pipe provided between the upper stirring body and the lower stirring body for injecting the solidification material, and a lower solidification material injection pipe provided below the lower stirring body for injecting the solidification material, A solidification material tank for storing the solidification material; an external supply pipe, one end of which is connected to the solidification material tank and the other end of which is connected to the upper solidification material injection pipe and the lower solidification material injection pipe; a supply pump that supplies the solidification material at a predetermined constant flow rate from the solidification material tank to the upper solidification material injection pipe and the lower solidification material injection pipe via the external supply pipe; an upper regulating valve provided in the external supply pipe for regulating the amount of the solidification material supplied to the upper solidification material injection pipe; a lower adjustment valve provided in the external supply pipe for adjusting the amount of the solidification material supplied to the lower solidification material injection pipe; a supply control unit that controls the supply of the solidification material to the upper solidification material injection pipe and the lower solidification material injection pipe by starting the supply pump and controlling the upper adjustment valve and the lower adjustment valve; A solidification material supplying device comprising:

2. An input receiving unit that receives an instruction input by an operator is further provided, The input reception unit receives a pump start instruction to start the supply pump, When the supply control unit receives the pump start instruction, the supply control unit starts the supply pump to start supplying the solidification material, The input reception unit receives a first supply instruction to supply the solidification material to the lower solidification material injection pipe after the supply pump is started, When the supply control unit receives the first supply instruction, the supply control unit controls the lower adjustment valve to supply a predetermined amount of the solidification material to the lower solidification material injection pipe, The input reception unit receives a second supply instruction to supply the solidification material to the upper solidification material injection pipe after the supply pump is started, When the supply control unit receives the second supply instruction, the supply control unit controls the upper adjustment valve to supply a predetermined amount of the solidification material to the upper solidification material injection pipe.

2. The solidification material supplying device according to claim 1.

3. When the supply control unit receives one of the first supply instruction and the second supply instruction after the supply pump is started, the supply control unit supplies all of the solidification material supplied by the supply pump to one of the lower solidification material injection pipe and the upper solidification material injection pipe.

3. The solidification material supplying device according to claim 2.

4. When the supply control unit receives the first supply instruction and the second supply instruction after the supply pump is started, the supply control unit distributes the solidification material supplied by the supply pump at a predetermined ratio and supplies the solidification material to the lower solidification material injection pipe and the upper solidification material injection pipe.

4. The solidification material supplying device according to claim 3.

5. The input reception unit receives a pump stop instruction to stop the supply pump, When the supply control unit receives the pump stop instruction, the supply control unit stops the supply pump and stops the supply of the solidification material. The solidification material supplying device according to any one of claims 2 to 4.

6. An input receiving unit that receives an instruction input by an operator is further provided, The input reception unit receives a pump start instruction to start the supply pump, When the supply control unit receives the pump start instruction, the supply control unit starts the supply pump and controls one of the lower adjustment valve and the upper adjustment valve to supply all of the solidification material supplied by the supply pump to one of the lower solidification material injection pipe and the upper solidification material injection pipe.

2. The solidification material supplying device according to claim 1.

7. The supply control unit controls the lower adjustment valve and the upper adjustment valve after a predetermined time has elapsed since the supply pump is started, to distribute the solidification material supplied by the supply pump at a predetermined ratio and supply the solidification material to the lower solidification material injection pipe and the upper solidification material injection pipe.

7. The solidification material supplying device according to claim 6.

8. The supply control unit stops the supply pump to stop the supply of the solidification material when a required supply amount of the solidification material, which is a supply amount required for a predetermined stirring and mixing, has been supplied.

8. The solidification material supplying device according to claim 7.

9. The frame has a pair of vertical frames facing each other and rotatably supporting both ends of the upper stirring body and the lower stirring body, The upper solidification material injection pipe and the lower solidification material injection pipe extend along a direction in which the pair of vertical frames face each other, The upper solidification material injection pipe is provided with a plurality of upper solidification material injection ports that inject the solidification material at intervals in the extension direction thereof, The lower solidification material injection pipe is provided with a plurality of lower solidification material injection ports that inject the solidification material at intervals in the extension direction. The solidification material supplying device according to any one of claims 1 to 8.

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