JP3936265B2 - Apparatus and method for charging powder into ground - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention introduces a powder injection device into the ground for introducing the powder into the ground, stirring and kneading, and performing ground improvement, soil improvement, and the like, and powder into the ground by the device Regarding the input method.
[0002]
In the present specification, the “powder and granule” is a powder or a granule or a mixture of a powder and a granule, and is a general term for a powder and / or a granule.
[0003]
[Prior art]
Conventionally, in a construction where a granular material is introduced into the ground to improve the ground or soil quality, for example, the auger screw is used to dig into the ground where the granular material is to be charged, and the compressed air is used to the ground. The granule was pumped, or the powder was stirred and kneaded with a fluid such as water to form a slurry to be pumped with a pump.
[0004]
[Problems to be solved by the invention]
However, regardless of whether the granular material is pumped using compressed air or is pumped in a slurry form, the equipment for that is large, and the preparation and installation costs are large.
[0005]
Furthermore, when pumping in the form of a slurry, when the specific gravity of the granular material mixed with the fluid such as water is large, stagnation of the granular material, precipitation or the like occurs, and when the granular material is too light As a result, scattering and floating of the granular material occurred, and in any case, the conveyance of the granular material was hindered.
[0006]
In addition, when the charged granular material is solidified like cement, if the charged granular material is not intended for solidification and the granular material itself does not have the property of solidifying, the granular material There was also a problem that the ground into which the body was thrown loosened.
[0007]
Therefore, the present invention is an apparatus and method for introducing a predetermined granular material into the ground, and is less expensive than that of the prior art, more easily and smoothly, and in a state in which loosening of the ground after construction can be suppressed. To provide an apparatus and method that can be used to treat various types of ground and soil, such as ground improvement and soil quality improvement, which can be stirred and kneaded with the underground soil by introducing the powder into the ground to which the powder is to be charged. Let it be an issue.
[0008]
Further, the present invention is an apparatus and method for introducing a predetermined granular material into the ground, and further, an apparatus capable of injecting a predetermined fluid such as a predetermined solidifying agent and a chemical solution such as a drilling aid into the ground. And providing a method.
[0009]
[Means for Solving the Problems]
The present invention
An auger screw having an excavation head at the lower end and a soil agitating blade on the upper side thereof, and a soil conveying screw portion above the soil agitating blade, and being able to enter the ground while excavating the soil while being driven to rotate. When,
A granular material conveying screw having a rotating shaft extending in the same direction as the rotating shaft of the auger screw,
The rotation shaft of the auger screw has an inner hole extending from the upper end portion toward the lower end portion, and the inner hole is open at the upper end portion and the lower end portion is formed at the lower end portion of the auger screw. Communicating with the particle outlet,
The powder transport screw is mounted in the inner hole so as to be rotatable independently of the auger screw, and is transported to transport the powder to a powder discharge port at the lower end of the auger screw. providing granular material feeder into the ground that are.
[0010]
The present invention also provides a method for charging powder into the ground using such a powder input device. That is,
A powder input device installation step of installing the powder input device above the powder input target ground; and
Soil excavation for rotating and driving the auger screw of the granular material charging device and lowering the auger screw together with the granular material conveying screw, and excavating the soil while allowing the excavation head and the soil agitating blade to enter the ground to which the granular material is charged An entry process;
In a state where the excavation head and the soil agitating blade are disposed in the ground material target, the granular material conveying screw is driven to rotate independently from the auger screw , and the granular material conveying screw performs a predetermined operation. A granular material charging step of conveying and charging the granular material into the ground;
In the state where the excavation head and the soil agitating blade are arranged in the ground for the granular material, the auger screw is driven to rotate, and the granular material to be charged in the granular material charging step and the ground soil A stirring and kneading step of stirring and kneading; and
After the stirring and kneading step, the auger screw pulling step for lifting and pulling the auger screw together with the granular material conveying screw while refilling the soil under pressure by rotating the auger screw in a reverse direction,
Is a method for charging a granular material containing.
[0011]
According to the powder input device and the powder input method using the same according to the present invention, the auger screw in the powder input device installed above the powder input target ground (usually the ground surface above the ground) is rotated. It can be driven and lowered together with the granular material conveying screw, and can be easily dug into the ground material target site while excavating the soil with the excavation head at the lower end of the auger screw.
[0012]
In a state where the excavation head and the soil stirring blade located above enter and reach the ground to which the granular material is charged, the granular material conveying screw is rotationally driven and a predetermined granular material is moved to the ground by the conveying screw. Transfer in.
[0013]
The feeding of this granular material is not a pumping of the granular material by compressed air which requires a large facility, or it is not pumped as a slurry by kneading the granular material with a fluid, but is built in an auger screw Since it is based on a simple mechanism and method based on the rotational drive of the granular material conveying screw, the granular material can be conveyed and introduced into the target ground easily and smoothly at a low cost. Moreover, since the structure of the granular material charging device can be simplified, it can be provided at low cost. It can be provided easily and inexpensively by modifying a conventional earth auger or the like. Furthermore, since the granular material is conveyed by the granular material conveying screw, it is easy to convey and feed the granular material by adjusting the diameter of the screw and controlling the rotation speed of the screw. There is also an advantage that can be controlled.
[0014]
A powder material hopper may be provided continuously at the upper end opening of the inner hole of the auger screw. If it does in this way, a granular material supply mechanism can be simplified. In the case of providing such a hopper, it is desirable to extend the screw part of the granular material conveying screw to the granular material storage area in the hopper in order to further facilitate and facilitate the conveyance of the granular material .
[0015]
In a state where the excavation head and the soil agitating blade in the auger screw are arranged in the ground to which the granular material is charged, the auger screw is rotationally driven to stir and knead the ground granular material and the ground soil.
[0016]
Depending on the situation, this stirring and kneading step may be started prior to the start of the addition of the granular material, may be started together with the start of the input of the granular material, or may be started after the start of the input of the granular material.
[0017]
After stirring and kneading the charged granular material and underground soil, by rotating the auger screw in reverse, the soil is backfilled under pressure mainly in the screw portion of the auger screw, together with the granular material conveying screw. The auger screw is raised and pulled out. Thus, the operation of charging the granular material into the ground is completed.
[0018]
When the auger screw is pulled out, the auger screw is rotated in the reverse direction, so that the soil is mainly backfilled under pressure in the screw part of the auger screw, so that even if the powdered granular material does not have a solidifying ability, It can suppress the looseness of the ground later.
[0019]
The granular material charging apparatus and method of the present invention can be used for various ground and soil treatments such as ground improvement and soil quality improvement.
[0020]
For powder, various organic powders, inorganic powders, mixed powders of these, etc. can be adopted according to the purpose of soil treatment. For purification of contaminated soil, cement can be used, for example, a powder made of iron.
[0021]
In the granular material charging device according to the present invention, the granular material conveying screw is rotatably installed in the auger screw inner hole so as to be rotatable and movable up and down independently of the auger screw, and at the lower end portion, the lower end portion of the auger screw is moved up and down. And an opening / closing member for opening / closing the granular material discharge port .
[0022]
Therefore, when carrying out the method of charging the granular material, at least in the soil excavation approach step, the opening and closing member of the lower end portion of the granular material conveying screw is disposed at a position where the granular material discharge port of the lower end portion of the auger screw is closed. Thus, the excavated soil can be prevented or suppressed from entering the inner hole of the auger screw. Moreover, in the said powder body injection | throwing-in process, this opening-and-closing member can be arrange | positioned in the position which opens the powder body discharge port of the said auger screw lower end part, and can supply a powder body. In this case, by adjusting the position of the opening / closing member, it is also possible to control the amount of the granular material charged by adjusting the opening of the granular material discharge port.
[0024]
The granular material injection | throwing-in apparatus which concerns on this invention may have the fluid injection path for the rotating shaft of the said granular material conveyance screw to inject | pour a predetermined fluid into the ground.
[0025]
In this case, in carrying out the granular material charging method, depending on the type of fluid to be injected and the purpose of injection, in at least one of the soil excavation entering step, the granular material charging step, and the soil stirring and kneading step A predetermined fluid can be injected into the ground from the fluid injection path of the granular material conveying screw.
[0026]
Examples of such a fluid include a chemical solution that reacts with the charged granular material, a chemical solution that is a drilling aid, and the like. In some cases, a solidifying agent can be injected. By adopting such a fluid injection path, the scope of application of the apparatus and method of the present invention is expanded accordingly.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0028]
FIG. 1 schematically shows a side surface of an example of a granular material charging apparatus according to the present invention. FIG. 2 shows an auger screw support driving device, a granular material conveying screw support driving device and the like in the apparatus. FIG. 3 is a partial cross-sectional view showing a part including the excavation head and the soil agitating blade in the granular material charging device shown in FIG.
[0029]
1 and the like include an auger screw 1, an auger screw support driving device 2, a powder particle conveying screw 3, a powder particle conveying screw support driving device 4 (see FIG. 2), and the like. .
[0030]
The auger screw 1 is capable of entering the ground while excavating the soil while being rotationally driven, and has an excavation head 11 and a soil stirring blade 12 above it at the lower end, and above the soil stirring blade 12. It has a soil conveying screw part 13.
[0031]
At the lower end of the auger screw 1, there is a head shaft 10a having a hole 101a penetrating vertically as shown in FIG. The lower end opening of the head shaft 10 a is a granular material discharge port 101.
[0032]
The lower end portion of the head shaft 10a is the rotating shaft portion 111 of the excavation head 11, the upper portion thereof is the rotating shaft portion 121 of the soil stirring blade 12, and the upper portion thereof is the soil conveying screw portion. 13 is a rotating shaft portion 131 at the lower end portion. That is, the lower end portion of the screw portion 13 is provided on the outer peripheral surface of the rotating shaft portion 131.
[0033]
The excavation head 11 includes excavation blades 112 and 113 provided in two stages on the rotating shaft portion 111. The lower excavation blade 112 is formed to have a smaller diameter than the upper excavation blade 113 and can excavate hard ground. The upper excavation blade 113 can further excavate the ground excavated by the lower excavation blade 112 in a larger diameter region.
[0034]
The soil agitating blade 12 is provided with a plurality of pairs of agitating blades 122 projecting in the opposite directions from the rotating shaft 121 to the outside in the radial direction of the shaft. In FIG. 3, the plurality of anti-stirring blades 122 are shown in the same manner, but are actually shifted by a predetermined center angle. The outer diameter of the soil stirring blade 12 is the same as or slightly smaller than the outer diameter of the upper excavation blade 113.
[0035]
A shaft 10 b is further connected to the upper end portion of the head shaft 10 a that provides the rotation shaft portions 111, 121, and 131, that is, the upper end portion of the rotation shaft portion 131. The shaft 10b is formed by connecting several shafts with joints.
[0036]
The shaft 10b is also formed with a hole 101b penetrating vertically, and its lower end communicates with the upper end of the hole 101a of the head shaft 10a, and a granular material charging hopper 5 described later is inserted into the upper end of the hole 101b. It is.
[0037]
The remainder of the screw portion 13 of the auger screw 1 is formed on the outer peripheral surface of the shaft 10b. Thus, both shafts 10a and 10b provide a single auger screw rotating shaft 10. The hole 101a of the head shaft 10a and the hole 101b of the upper shaft 10b provide a single inner hole 100 that penetrates the auger screw rotating shaft 10 up and down.
[0038]
The shafts 10a and 10b are formed with a pair of retaining pins 132a inserted into the small diameter portion 132 of the shaft 10a by fitting the lower end portion of the shaft 10b to the small diameter portion 132 of the upper end of the shaft 10a and arranging the shaft 10b symmetrically. It is connected by inserting it into the groove. The connecting means between the shafts 10a and 10b is not limited to this.
[0039]
The granular material conveying screw 3 has a rotating shaft 31 extending in the same direction as the auger screw rotating shaft 10, and a granular material conveying screw portion 32 is provided on the outer peripheral surface thereof. The screw 3 is inserted into the inner hole 100 of the auger screw rotating shaft 10 so as to be rotatable independently of the auger screw 1 and to be movable up and down.
[0040]
In this state, an opening / closing member 33 is provided at the lower end of the conveying screw rotating shaft 31, and the member 33 raises the granular material conveying screw 3, so that the granular material discharge port 101 at the lower end of the auger screw is provided. Can be closed, and the granular material discharge port 101 can be opened by lowering. Moreover, the opening degree of the granular material discharge port 101 can also be controlled by adjusting the descending amount of the granular material conveyance screw 3.
[0041]
A fluid injection path 30 penetrates the rotating shaft 31 of the powder and particle conveying screw 3 vertically.
[0042]
As shown in FIG. 2, the auger screw support drive device 2 supports the auger screw 1 and rotationally drives the auger screw to move it up and down, and includes a support frame 21, an auger screw rotation drive unit, and an auger screw. Includes a lift drive.
[0043]
The support frame 21 can be moved up and down along the column CL as will be described later.
[0044]
As shown in FIG. 1, a movable pulley device m1 is mounted on the top of the support frame 21, and the support frame 21 and the like are moved up and down by the pulley device m1, the pulley device m2 on the support column, a winch (not shown), and the like. Can do.
[0045]
A gear box GB1 is suspended and supported by the support frame 21, and the upper end portion of the rotating shaft 10 of the auger screw 1 is rotatably supported by the gear box GB1 and a gear train (illustrated) is built in the gear box GB1. (Omitted) through two motors M1. The two motors M1 are arranged symmetrically on the support frame 21 and are mounted on the gear box GB1. Each motor M1 can rotate forward and reverse. Therefore, the auger screw 1 can be rotated forward or backward in the soil excavation direction by both motors M1. The motor M1, the gear box GB1, and the gear train incorporated therein constitute an auger screw rotation drive unit.
[0046]
A slider SL1 (see FIG. 1) is provided on the back side of the gear box GB1, and this slider SL1 is engaged with a support column CL connected to the self-propelled vehicle V so as to be movable up and down. Thus, the gear box GB1, the support frame 21 supporting the gear box GB1, the auger screw 1 supported by the gear box GB1, and the like can be moved up and down along the column CL by the slider SL1 and the winch (not shown) by the slider SL1. That is, the column CL, the slider SL1, the pulley devices m1, m2, and the like constitute an elevating drive unit that elevates the auger screw 1 and the like.
[0047]
The column CL is connected to a hydraulically operated piston cylinder device VPC on the self-propelled vehicle V via a stay ST, and the posture can be controlled by the piston cylinder device VPC.
[0048]
The granular material conveying screw support driving device 4 includes a screw driving unit and a screw lifting / lowering driving unit. Both these drive parts are mounted on the support frame 21.
[0049]
That is, another gear box GB2 is arranged on the support frame 21, and a motor M2 is connected to the gear box GB2. These are suspended from the upper portion of the support frame 2 via a hydraulically operated piston cylinder device PC.
[0050]
A rotating shaft 31 of the powder particle conveying screw 3 is rotatably supported by the gear box GB2, and is interlocked with a rotating shaft of the motor M2 via a gear train (not shown) in the box. Further, the rotating shaft 31 of the screw 3 is also connected to the swivel device S so as not to hinder driving by the motor M2. The swivel device S is mounted on the gear box GB2.
[0051]
A second slider SL2 is provided on the back side of the gear box GB2, and this slider SL2 is also engaged with the column CL so as to be movable up and down.
[0052]
The support frame 21 is further equipped with a powder particle injection hopper 5 which has an inverted cone shape or a pyramid shape, surrounds the powder particle conveyance screw 3, and the lower end of the auger screw rotates. It is inserted into the upper end opening of the shaft 10 so as not to hinder the rotation of the screw. The screw portion 32 of the conveying screw 3 extends to the powder body storage region of the hopper 5.
[0053]
Thus, the granular material conveying screw 3 can be moved up and down with respect to the auger screw 1 by the piston cylinder device PC, and therefore the granular material discharge port 101 can be opened and closed by the opening / closing member 33 (see FIG. 3) at the lower end. In addition, the powder and particle conveying screw 3 is driven to rotate independently of the auger screw 1 by the motor M2, and the particles and particles 6 in the hopper 5 are conveyed downward through the inner hole 100 of the auger screw rotating shaft 10, and the particles and particles are conveyed. It can be thrown into the ground from the discharge port 101.
[0054]
The piston cylinder device PC and the slider SL2 constitute a lifting and lowering drive unit for the powder and particle conveying screw, and the motor M2, the gear box GB2 and the gear train incorporated therein constitute a rotation driving unit for the particle and conveying screw. Yes.
[0055]
The swivel device S has a structure already known per se, and allows a predetermined fluid supplied through a pipe P connected to the swivel device S to flow into the fluid injection path 30 of the granular material transport screw rotating shaft 31, It can be supplied into the ground from the injection path 30.
[0056]
A predetermined granular material can be charged into the ground for the granular material as described below using the granular material charging apparatus A described above. One example will be described below with reference to FIG.
[0057]
FIGS. 4A to 4D are process explanatory views showing an example of a method for putting powder into the ground using the apparatus A shown in FIGS. 1 to 3.
(1) Granule input device installation process First, as shown in FIG. 4 (A), the powder input device A is installed on the upper surface LS in the powder input target ground. This device can be installed by transporting the device A to the place by the self-propelled vehicle V. A predetermined granular material 6 is put in the granular material charging hopper 5. Although the powder body 6 is not limited to it, it is a powder body which consists of iron materials here.
(2) Soil excavation approaching step Next, as shown in FIG. 4B, the auger screw 1 is lowered by lowering the support frame 21 while the auger screw 1 is rotated forward by the motor M1. While excavating the soil, the excavation head 11 and the soil agitating blade 12 are made to enter the ground material injection target ground EA and disposed there. At this time, the granular material transport screw 3 also descends together with the auger screw 1 as the support frame 21 descends.
[0058]
In this step, it is not necessary to rotationally drive the powder conveying screw 3 yet. Moreover, the granular material discharge port 101 at the lower end of the auger screw rotating shaft 10 is closed by the opening / closing member 33 to prevent soil from entering the inner hole 100 of the auger screw rotating shaft 10.
(3) Granules charging step and stirring and kneading step Next, as shown in FIG. 4 (C), the powder conveying screw 3 is motored with the excavation head 11 and the soil agitating blade 12 placed in the underground EA. At M2, it is rotationally driven in the granular material conveying direction and lowered by the piston cylinder device PC mounted on the support frame 21, and the opening / closing member 33 is arranged at a position where the granular material discharge port 101 is opened. Thus, the powder particles 6 in the hopper 5 are conveyed and fed from the discharge port 101 to the underground EA by the screw 3.
[0059]
In addition, with the excavation head 11 and the soil agitating blade 12 arranged in the underground EA, the auger screw 1 is rotationally driven by the motor M1 at the same time as or slightly prior to the start of the powder particle injection. The granular material 6 and the soil of the underground EA are stirred and kneaded. This stirring and kneading is performed mainly by rotating the soil stirring blade 12 described above.
(4) Auger screw drawing step After the agitation and kneading step, as shown in FIG. 4 (D), the auger screw 1 is reversely rotated by reversing the motor M1, whereby the soil is mainly collected by the screw portion 13 of the auger screw. The auger screw 1 is lifted and pulled out together with the granular material conveying screw 3 while being backfilled under pressure. Thus, the operation of charging the granular material into the ground is completed. By backfilling under pressure of the soil by reverse rotation of the auger screw 1, loosening of the ground after construction is suppressed accordingly.
[0060]
In this step, it is not necessary to rotate the screw 3, so it is sufficient to stop the rotation, and the powder inlet 101 need not be kept open, and may be closed by the opening / closing member 33.
[0061]
When trying to inject a fluid, depending on the type of fluid to be injected and the purpose of injection, the granular material transport in at least one of the soil excavation entry step, the granular material charging step and the soil agitation kneading step A predetermined fluid may be injected from the fluid injection path 30 of the screw 3 into the ground.
[0062]
The granular material charging operation described above is not pumping the granular material by compressed air which requires large-scale equipment for supplying and charging the granular material. Because it is based on a simple mechanism and method based on the rotational drive of the granular material conveying screw 3 built in the auger screw 1 and the screw lowering operation for setting the opening / closing member 33 to the open position, it is less expensive. In addition, it can be easily and smoothly transported and put into the underground EA that targets the granular material 6.
[0063]
Moreover, since the structure of the granular material charging device A can be simplified, it can be provided at low cost. Furthermore, since the granular material 6 is conveyed with the granular material conveyance screw 3, conveyance injection | throwing-in of the granular material 6 is carried out by adjusting the diameter of the screw 3, etc., controlling the rotation speed of the screw 3, etc. There is also an advantage that the amount can be easily controlled.
[0064]
The granular material charging apparatus A and the granular material charging method using the apparatus can be used for various ground and soil treatments such as ground improvement and soil improvement.
[0065]
【The invention's effect】
According to the present invention, there is provided an apparatus and method for introducing a predetermined granular material into the ground, which is less expensive than the prior art, and more easily, smoothly, and in a state in which loosening of the ground after construction can be suppressed. To provide an apparatus and method that can be used for various ground and soil treatments, such as ground improvement and soil quality improvement, in which powder particles can be put into the ground into which powder is to be added and stirred and kneaded with the ground soil. Can do.
[0066]
In addition, according to the present invention, there is provided an apparatus and method for introducing a predetermined granular material into the ground, and further, a predetermined fluid such as a predetermined solidifying agent, a chemical solution such as a drilling aid can be injected into the ground. Apparatus and methods can also be provided.
[Brief description of the drawings]
FIG. 1 is a side view of an example of a granular material charging apparatus according to the present invention.
FIG. 2 is a front view of an auger screw support driving device, a granular material conveying screw support driving device and the like in the apparatus shown in FIG. 1;
FIG. 3 is a side view showing a part of a section including the excavation head and the soil stirring blade in the apparatus shown in FIG.
FIGS. 4A to 4D are process explanatory views showing an example of a method of putting powder into the ground using the apparatus shown in FIG.
[Explanation of symbols]
A Particulate loading device 1 Auger screw 10 Auger screw rotating shaft 100 Inner hole 10a of auger screw 1 Head shaft 101a Inner hole 101 of head shaft 10a Particulate discharge port 11 Drilling head 111 Rotating shaft 112 of drilling head 11 Side excavation blade 113 Upper excavation blade 12 Soil agitating blade 121 Rotating shaft portion 122 of soil agitating blade 12 Counter agitating blade 10b Shaft 101b Inner hole 13 of shaft 10b Screw portion 131 of auger screw 1 Rotating shaft portion of the lower end portion of screw portion 13 2 Auger screw support drive device 21 Support frame M1 Motor GB1, GB2 Gear box SL1, SL2 Slider CL Column m1, m2 Pulley device V Self-propelled vehicle VPC Piston cylinder device ST Stay 3 Powder transport screw 31 Rotating shaft 32 of screw 3 Screw 3 screw Part 30 Fluid injection path 4 Powder transport screw support drive device PC Piston cylinder device M2 Motor S Swivel device P Pipe 5 Powder feed hopper LS Ground surface EA Underground

Claims (6)

An auger screw having an excavation head at the lower end and a soil agitating blade on the upper side thereof, and a soil conveying screw portion above the soil agitating blade, and being able to enter the ground while excavating the soil while being driven to rotate. When,
A granular material conveying screw having a rotating shaft extending in the same direction as the rotating shaft of the auger screw,
The rotation shaft of the auger screw has an inner hole extending from the upper end portion toward the lower end portion, and the inner hole is open at the upper end portion and the lower end portion is formed at the lower end portion of the auger screw. Communicating with the particle outlet,
The powder transport screw is mounted in the inner hole so as to be rotatable independently of the auger screw, and is transported to transport the powder to a powder discharge port at the lower end of the auger screw. And
The powder and granular material conveying screw is rotatably and vertically movable independently from the auger screw in the inner hole, and an opening and closing member that opens and closes the granular material discharge port at the lower end of the auger screw by a lifting and lowering operation. An apparatus for charging granular material into the ground. It has a drilling head at the lower end and a soil agitating blade above it, and a soil conveying screw part above the soil agitating blade, allowing it to enter the ground while excavating the soil while being driven by a motor. Auger screw,
A granular material conveying screw having a rotating shaft extending in the same direction as the rotating shaft of the auger screw,
The rotation shaft of the auger screw has an inner hole extending from the upper end portion toward the lower end portion, and the inner hole is open at the upper end portion and the lower end portion is formed at the lower end portion of the auger screw. Communicating with the particle outlet,
The powder transport screw is installed in the inner hole so that it can be driven independently of the auger screw by a motor for the powder transport screw different from the motor for the auger screw that drives the auger screw to rotate. And is mounted so as to convey the granular material to the granular material discharge port at the lower end of the auger screw, and the granular material conveying screw can be rotated independently of the auger screw and moved up and down in the inner hole An apparatus for charging granular material into the ground, characterized in that it has an opening and closing member at its lower end that opens and closes the granular material discharge port at the lower end of the auger screw . The granular material injection | throwing-in apparatus of Claim 1 or 2 which has the hopper for granular material injection | throwing-up provided in the upper end part opening of the said auger screw inner hole . The granular material injection device according to claim 1, 2 or 3, wherein the rotating shaft of the granular material conveying screw has a fluid injection path for injecting a predetermined fluid into the ground . It is a method of charging a granular material into the ground using the granular material charging device according to any one of claims 1 to 4.
A powder input device installation step of installing the powder input device above the powder input target ground; and
Soil excavation for rotating and driving the auger screw of the granular material charging device and lowering the auger screw together with the granular material conveying screw, and excavating the soil while allowing the excavation head and the soil agitating blade to enter the ground to which the granular material is charged An entry process;
In a state where the excavation head and the soil agitating blade are arranged in the ground to which the granular material is charged, the granular material conveying screw is driven to rotate independently from the auger screw, and the granular material conveying screw is driven. A granular material charging step of conveying and charging a predetermined granular material into the ground with Liu,
In the state where the excavation head and the soil agitating blade are arranged in the ground for the granular material, the auger screw is driven to rotate, and the granular material to be charged in the granular material charging step and the ground soil A stirring and kneading step of stirring and kneading; and
After the stirring and kneading step, including an auger screw pulling step of pulling up the auger screw together with the granular material conveying screw while backfilling the soil under pressure by rotating the auger screw in a reverse direction,
At least in the soil excavation approach step, the opening / closing member of the lower end portion of the granular material transport screw is disposed at a position to close the granular material discharge port of the lower end portion of the auger screw, and in the granular material charging step, the opening / closing member 2. A method for charging granular material, comprising: disposing a member at a position where a granular material discharge port at a lower end of the auger screw is opened. It is a method of introducing a granular material into the ground using the granular material charging device according to claim 4 as a granular material charging device, and depending on the type of fluid to be injected and the purpose of injection, the soil excavation approach step, The granular material injection | throwing-in method of Claim 5 which inject | pours a predetermined fluid into the ground from the fluid injection path of the said granular material conveyance screw in at least 1 process among the said granular material injection | throwing-in process and the said soil stirring kneading | mixing process .

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