JPH09250129A - Soil improvement machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stir and mix equally excavated soil and hardener, prevent a supply loss of the hardener and, at the same time prevent dust pollution. SOLUTION: A fixed cylindrical shaft 11 and a rotational cylindrical shaft 12 are provided to the lower part of a machine frame in a double cylindrical- shape, and a fixed slit channel 21 in parallel with the center axis is opened between both ends of the lower surface on the circumferential surface of the filxed cylindrical shaft 11. Then, a rotational slit channel 20 having a required shape and always crossing with the fixed slit channel 21 at one place is opened between both side end sections of the circumferential surface of the rotational cylindrical shaft 12, and the hardener supplied to the inside of the fixed cylindrical shaft 11 is discharged downward from a cross section moving in right and left direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground improvement machine for agitating and mixing soil and a solidifying material such as powdery or milky material while excavating to construct a foundation for a structure or the like and improving the ground. .

[0002]

2. Description of the Related Art A conventional soil improving machine is a base machine 101 shown in FIG. 18 and has side arms 103a and 10a of a machine frame 103 formed at the tip of an arm 102 as shown in FIG.
A drive shaft 1 which is rotationally driven by a motor 104 at an upper portion between 3b
05 is mounted on the drive shaft 105, and the drive sprocket 10 is attached to the drive shaft 105.
6 is mounted, and the driven sprocket 109 and the driven sprocket 1 are mounted on the both side plates 107a and 107b of the support frame 107 mounted on the lower ends of the both side plates 103a and 103b.
An endless chain 110 is wound between 09, and the rotary shaft 108 is formed in a hollow cylindrical shaft shape so that a solidifying material such as cement is supplied through a swivel device 111 provided on one side thereof. A plurality of jet outlets 112 communicating with the hollow interior are provided on the outer peripheral surface along the axial direction, and a large number of stirring blades 113 are provided.
The driven sprocket 109 is rotated by the rotational driving of the motor 104, and the solidified material is discharged from the ejection port 112 at a high pressure, while the stirring blades 113 are used to stir and mix the ground.

Such a conventional ground improvement machine has a machine frame 1
Since a large number of agitating blades 113 are provided on the rotary shaft 108 that is axially mounted only on the lower end of 03, and the ground is excavated and agitated by the agitating blades 113 that rotate horizontally with the rotation of the rotary shaft 108, The soil stirring range is narrow and it is difficult to excavate and stir, especially in a wide vertical range. In addition, since many jet outlets 112 always change their directions by 360 degrees with the rotation of the rotary shaft 108, the solidified material is discharged in an unnecessary direction, and for example, the rotary shaft 108 is removed when the ground improvement machine is pulled up. When it comes out to the surface of the earth and when the ejection port 112 is facing upward, dust such as cement may scatter around,
It also causes a loss of solidification material supply and pollution.

Therefore, as shown in FIG. 18, the drive shaft 10
Mount a pair of drive sprockets 106, 106 on 5,
Rotating shaft 108 mounted on both support frames 107a and 107b
A pair of driven sprockets 109, 109 are mounted on the drive sprocket 106, 106 and the driven sprocket 10.
Endless chains 110 and 110 are wound between 9 and 109, and a large number of stirring blades 113 are respectively installed in the chains 110 and 110, and the drive sprockets 106 and 106 are rotated by the rotational driving of the motor 104, The ground is excavated and agitated by a large number of agitation blades 113, and a solidifying material pressure-feeding pipe 114 is additionally provided along one side plate 103b of the machine frame 103. There is one in which the solidification material is jetted horizontally from the outlet 112 and the ground is stirred and mixed by a large number of stirring blades 113.

[0005]

This ground improvement machine is
As the chains 110, 110 rotate, the chains 110,
A large number of stirring blades 113 arranged in a row in the vertical direction 110 move vertically to excavate and stir the soil in a wide range in the vertical direction. However, since the solidified material is constantly ejected only on one side, there is a problem in that the solidified material with respect to the excavated ground has unevenness in density, and uniform mixing cannot be achieved. Moreover, when the jet outlet 112 of the solidified material pumping pipe 114 is exposed to the surface of the ground as the ground improvement machine is pulled up, the jet outlet 11
Since No. 2 faces sideways, there is a problem that causes loss of the solidifying material and dust pollution as in the ground improvement machine shown in FIG. Therefore, the present invention has been made to solve these problems and enables the solidified material to be jetted downward and bidirectionally so that the ground can be uniformly stirred and mixed, and further, the solidified material supply loss is reduced. The purpose is to provide a ground improvement machine that can prevent pollution.

[0006]

In order to achieve such an object, a ground improvement machine according to the present invention has a rotatable drive shaft horizontally mounted with a pair of drive sprockets mounted on the upper part of a machine frame. A double cylindrical support shaft portion is horizontally provided on the lower part of the frame by a non-rotatable fixed cylinder shaft and a rotatable rotary cylinder shaft, and a pair of driven sprockets are mounted on the outer circumference of the rotary cylinder shaft, and the above-mentioned upper and lower sprockets A chain with stirring blades attached is wound between them, and a fixed slit groove parallel to the central axis is formed between both ends of the lower surface on the outer peripheral surface of the fixed cylindrical shaft. Has a desired shape between both ends and has a continuous or discontinuous rotary slit groove that always intersects with the fixed slit groove at one place, and the solidifying material supplied into the fixed cylinder shaft intersects both slit grooves. It is configured to discharge downward from the part. In this ground improvement machine, since the intersection of the rotary slit groove moves in the central axis direction due to the movement of the rotary slit groove due to the rotation of the rotary tubular shaft, the solidifying material is supplied into the fixed tubular shaft. If the solidified material is discharged from the intersection, the solidified material is always discharged downward because the intersection is downward, and the discharge amount is substantially uniform in the central axis direction.

Further, a rotatable drive shaft having a pair of drive sprockets is horizontally mounted on the upper part of the machine frame, and a fixed cylinder shaft is horizontally mounted on the lower part of the machine frame and the fixed cylinder shaft is mounted on the fixed cylinder shaft. A rotary cylinder shaft having a pair of driven sprockets mounted on the outer circumference is attached, and a chain having stirring blades is wound between the upper and lower sprockets, and a solidified material pressure-feeding pipe is attached to one end of the fixed cylinder shaft. In addition to connecting, the discharge port is provided at an appropriate position on the lower surface side, and the tip end opening is sequentially reversed in the rotating cylinder shaft, and the injection guide pipe communicating when the base end opening matches the discharge port is radial and the like. Attach multiple pieces at intervals, while
Each of the chains is provided with a horizontal guide plate which is located on the rotation direction side of the injection guide tube and which is aligned with the tip opening of the injection guide tube. In this ground improvement machine, when the base end opening of the injection guide pipe matches the discharge port of the fixed cylinder shaft, the solidified material in the fixed cylinder shaft enters the injection guide pipe through the discharge port, and at the same time, the injection is performed. The guide plate is located on the rotation direction side of the tip opening of the guide tube,
The solidified material ejected from the tip opening of the injection guide tube is received by the guide plate and discharged, and at this time, the guide plate rotates while pushing the soil separately, and the tip opening of the injection guide tube is reversed in order. Solidified material is jetted alternately to the left and right sides,
A homogeneous mixture of the ground and the solidified material is made.

Further, in the latter ground improvement machine, each of the guide plates is arranged in the chain at a position where the tip opening of the injection guide pipe is close to the front face of the guide plate as the injection guide pipe rotates. Thus, the solidified material ejected from the tip of the injection guide tube is ejected into the void formed at the moment when the guide plate passes. When two injection guide tubes are attached, the solidified material can be evenly sprayed in the left-right alternate direction within a range of 180 degrees downward, and further, the powdered granular solidified material can be supplied by pneumatic feeding. Become.

Further, a plate-shaped stirring blade base is arranged in a row across both chains in an orthogonal manner, and several stirring blades are attached to the front surfaces of the respective stirring blade bases so as to be displaced from each other. By doing so, the ground is excavated uniformly in the entire width direction of the plurality of stirring blades, and the soil and the solidifying material are uniformly stirred and mixed.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of a ground improvement machine according to the present invention will be described below with reference to the drawings. FIG. 1 shows a ground improvement machine for excavating the ground while stirring and mixing it with a solidifying material. Reference numeral 1 is a self-propelled backhoe (base machine), a movable arm 2 is extended from the backhoe 1, and the ground is improved by excavating and stirring the ground by descending into the ground at the tip of the arm 2. Machine 3 is installed. The solidifying material may be powdery cement or milk.

In the ground improvement machine 3, a machine frame 4 is fixed to the tip of the arm 2, and a drive shaft 5 as a rotary shaft is horizontally mounted above the both side plates 4a and 4b. Reference numeral 6 denotes a reversible drive motor which is mounted on the outside of one side plate 4a and drives the drive shaft 5 to rotate. Further, the drive shaft 5
Is provided with a pair of drive sprockets 7, 7.
A pair of upper and lower horizontal rods 8 and 8 are installed below the side plates 4a and 4b, and a pair of support frames 9 and 9 are formed from these horizontal rods 8 and 8 in positions corresponding to the pair of drive sprockets 7 and 7. Be drooped. A non-rotatable fixed cylinder shaft 11 is provided between the bifurcated support legs 10 and 10 attached to the lower ends of the support frames 9 and 9, and the fixed cylinder shaft 11 rotates. A rotatable cylinder shaft 12 is provided. The rotary cylinder shaft 12 is rotatably supported by bearings 13, 13 attached to the outer lower ends 10a, 10a of the support legs 10, 10, respectively.
Driven sprockets 14, 14 are provided at both ends of the shaft 2 so as to face the drive sprockets 7, 7. The fixed cylinder shaft 11 is fitted to the rotary cylinder shaft 12 with a gap S provided between the fixed cylinder shaft 11 and the rotary cylinder shaft 12, and is fixed to the inner lower ends 10b and 10b of the support legs 10 and 10 so as not to rotate.

An endless chain 15, 15 is provided between the pair of drive sprockets 7, 7 and driven sprockets 14, 14.
A plurality of stirring blades 16a, 16b for excavating the ground and stirring the ground are provided in a plurality of rows on the outer peripheral surface of each of the chains 15, 15. The stirring blades 16a and 16b are a stirring blade 16a having a wide width and a stirring blade 1 having a width narrower than the stirring blade 16a.
6b are alternately arranged so that the ground can be efficiently stirred and mixed.

Reference numeral 17 is a solidifying material pressure-feeding pipe which is integrally provided along the ground improvement machine 3 and supplies the solidifying material. The solidifying material pressure-feeding pipe 17 is provided with a swivel device 18 to rotate the rotary cylinder shaft. 12 is connected to one end of 12 in a communicating manner to allow the rotary cylinder shaft 12 to rotate. Further, as shown in FIGS. 3 and 5, a spiral rotary slit groove 20 communicating with the hollow interior 19 is provided between both end portions of the outer peripheral surface of the rotary cylindrical shaft 12. The rotary slit groove 20 is formed continuously so as to make a complete circle between both ends of the rotary cylinder shaft 12. 4 and 6 are provided on the outer peripheral surface of the fixed cylinder shaft 11.
As shown in, a linear fixed slit groove 21 is formed between both end portions of the lower surface in parallel with the central axis. The fixed slit groove 21 and the rotary slit groove 20 always intersect at one place, and further, the intersecting portion 2 with the rotation of the rotary cylinder shaft 12.
2 moves in the direction of the central axis.

Both ends of the fixed cylinder shaft 11 are sealed members 2
An air supply pipe 24 is attached to the outer peripheral surface of the fixed cylinder shaft 11 and is continuous with the gap S. Then, during operation, compressed air is supplied from the air supply pipe 24 into the gap S so that the air is constantly ejected from the fixed slit groove 21 at a constant pressure. This is because the soil penetrates into the fixed slit groove 21 and further into the gap S, and the rotating cylinder shaft 12
This is for the purpose of not hindering the rotation and the discharge of the solidified material from the intersecting portion 22.

The operation of the ground improvement machine configured as described above will be described. Rotating the chains 15, 15 in the direction of the arrow in FIG. 1 to lower the ground deeply into the ground while excavating the ground improvement machine 3, supplying the solidified material from the solidified material pressure-feeding pipe 17, and further rotating the solidified material as a rotary cylinder shaft. 12 rotary slit grooves 20 and fixed cylinder shaft 1
The ground is excavated while being discharged from the intersection 22 with the second fixed slit groove 21, and the mixture is stirred and mixed with the solidifying material. The solidifying material is always discharged downward, and a substantially constant amount is uniformly discharged as the intersecting portion 22 moves, so that the solidifying material is dispersed evenly in the ground and the ground is improved uniformly. In addition, even when the ground improvement machine 3 is pulled up above the ground,
Since the solidifying material is discharged downward from the intersecting portion 22, especially in the case of powder such as cement, it is less likely to scatter around, the supply loss is reduced, and pollution due to dust is also prevented.

7 to 9 relate to another embodiment, in which the fixed slit groove 21a provided on the lower side of the fixed cylinder shaft 11 is arranged in the direction opposite to the spiral rotary slit groove 20. As shown in FIG. It is provided in a slightly spiral shape so that it can be wound. By thus forming the fixed slit groove 21a in a spiral shape, the solidified material can be widely discharged with a desired angle α in the normal direction of the outer peripheral surface of the fixed cylindrical shaft 11 as shown in FIG. Also, by changing the angle, you can freely select the direction you want to eject.

The one shown in FIG. 10 is also related to another embodiment, and is a developed view of the rotary cylinder shaft 12a. In this embodiment, the rotary slit grooves 20a, 20a are formed discontinuously and in different directions, and by doing so, the strength of the rotary cylinder shaft 12a can be increased. Further, the fixed cylindrical shaft 11 has fixed slit grooves 21b, 21b, 21b formed on both the right and left sides and directly below the lower surface (A in the drawing indicates the upper end position of the upper surface of the fixed cylindrical shaft 11), and thus the number is small. Both have a plurality of fixed slit grooves 21b, 2 below the center.
By providing 1b and 21b, the strength of the fixed cylindrical shaft 12 can be increased and the fixed slit grooves 21b and 21b can be formed.
By changing the positions of b and 21b at the time of molding, the injection range and the injection direction can be freely changed, which also contributes to the improvement of work efficiency.

FIG. 11 also shows another embodiment, in which this embodiment has a structure in which a rotary cylinder shaft 12X is arranged outside and a fixed cylinder shaft 11X is arranged inside. That is, the fixed cylindrical shaft 11X is non-rotatably provided horizontally at the tips of the pair of support frames 25, 25, and the solidified material pressure feed pipe 17X for supplying the solidified material is connected to one end side thereof. The driven sprockets 14X and 14X are fixed to both ends of the rotary cylinder shaft 12X, respectively.
Reference numerals 26 and 26 denote bearings interposed between the fixed cylinder shaft 11X, the rotary cylinder shaft 12X, the driven sprocket 14X and the support frame 25, whereby the driven sprockets 14X and 14X are provided.
The rotary cylinder shaft 12X is rotatable.

Also in this embodiment, the rotary cylinder shaft 12
A gap SX is formed between X and the fixed cylinder shaft 11X, the air supply pipe 24X is inserted into the fixed cylinder shaft 11X, and the tip of the air supply pipe 24X communicates with the gap SX and the fixed cylinder shaft 11X.
It is connected to the through hole 27 opened in. Further, linear fixed slit grooves 21X are formed on the outer peripheral surface of the fixed cylindrical shaft 11X over both side ends of the lower surface, and a spiral rotary slit groove 20X is formed on the outer peripheral surface of the rotary cylindrical shaft 12X over both side ends. Is opened. The rotary slit groove 20X is provided with a protrusion 28 having a constant height along the front side edge in the rotation direction. This is because the ridge 28 pushes away the soil by the rotation of the rotary cylinder shaft 12X in the ground, so that there is a space near the outlet of the rotary slit groove 20X, and the solidifying material can be discharged well. The driven sprockets 14X and 14X are wound with chains 15X and 15X in which stirring blades 16X are arranged. Further, in this embodiment, since it is not necessary to use the swivel device 18 as in the above-described embodiment, the machine can be simplified and the resistance of the soil in the ground can be reduced accordingly.

The rotating cylinder shafts 12, 12a, 12 described above
The rotary slit grooves 20, 20a, 20X of X are not limited to those shapes, and the fixed slit grooves 21, 2
Other shapes may be used as long as they intersect with 1a, 21X at one place, and fixed slit grooves 21, 21a, 21X
Is formed over both end portions of the lower surface, the same effect can be obtained whether the fixed cylinder shafts 11 and 11X are inside or outside the rotary cylinder shafts 12 12a and 12X.

The ground improvement machine shown in FIGS. 12 to 15 relates to the second embodiment, and is designated by reference numerals 1 to 15.
The components marked with are substantially the same as those in the first embodiment, and thus the description thereof is omitted. However, the rotary cylinder shaft 12 is provided outside the fixed cylinder shaft 11, not inside. And Chen 1
A plate-shaped stirring blade base 29 and a gutter-shaped guide plate 30 are provided on the outer peripheral surfaces of the chains 15 and 15 so as to cross each other at right angles, and a plurality of rows are provided at equal intervals. Two bases 29 are provided in succession, and one guide plate 30 is provided at equal intervals. Then, the stirring blades 16, 16 are attached to both front surfaces of each stirring blade base 29. The guide plate 30 is not limited to a gutter-shaped member, but may be a flat plate-shaped member or a cross-shaped member.

A fixed cylinder shaft 11 is mounted between both side plates 4c and 4d at the lower ends of the support frames 9 and 9. A solidified material pressure-feeding pipe 17 is connected to one end of the fixed cylinder shaft 11, and a plug 31 is fitted and closed at the other end. A discharge port 32 opened 180 degrees is provided in the lower half of the central portion of the fixed cylinder shaft 11. The rotary cylinder shaft 12 is composed of triple pipes 12a, 12b, 12c whose both ends are supported by bearings 33, 33.
The outlets 34a and 34b are opened in 2a by changing the position on the left and right and further by changing the direction by 180 degrees. Also, the middle tube 12
The injection guide pipes 35a and 35b are penetrated and supported by b so as to communicate with the respective outlets 34a and 34b. The tip ends of these injection guide tubes 35a, 35b are bent to the left and right sides in different directions by 180 degrees, and the tip openings 36a, 36b are oriented leftward or rightward. Further, the outer pipe 12c supports the injection guide pipes 35a and 35b. The outlets 34a and 34b of the inner pipe 12a are communicated with each other only when they coincide with the outlet 32.

The operation of the ground improvement machine configured as described above will be described. The chains 15 and 15 are rotated in the direction shown by the arrow in FIG. 12, while the ground improvement machine 3 is being excavated by the stirring blades 16 while being lowered into the ground, the solidification material is fed from the solidification material feed pipe 17. The solidified material supplied from the solidified material pressure-feeding pipe 17 to the fixed cylindrical shaft 11 rotates to the discharge port 32 of the fixed cylindrical shaft 11.
The injection guide pipes 35a, 35b enter the injection guide pipes 35a, 35b only while any of the outlet ports 34a, 34b of 2a are in communication with each other, and are ejected while being guided by the guide plate 30 through the tip openings 36a, 36b.

As shown in FIG. 15, the range in which the solidified material is ejected is such that the outlets 34a and 34b provided in the inner tube 12a of the rotary cylinder shaft 12 rotating in synchronization with the driven sprockets 14 and 14 are directed downwards toward the fixed cylinder shaft 11. Any one of the injection guide pipes 3 while communicating with the discharge port 32 provided in, that is, while the injection guide pipes 35a and 35b rotate 180 degrees below the horizontal position.
5a and 35b are alternately and continuously injected, and are alternately switched to the left or right depending on the direction of the tip openings 36a and 36b, and are further injected into the ground by being guided by the guide plate 30. .

Moreover, the solidifying material is the injection guide tubes 35a, 35.
Since b only injects only in the range that rotates downward from the horizontal position, when the fixed cylinder shaft 11 comes out to the surface as the ground improvement machine 3 is pulled up to the ground, the solidifying material is powder like cement. Even if there is, dust is rarely scattered around, and the supply loss of the solidifying material is reduced, and dust pollution is hardly caused. In addition, the outlet 34 provided in the inner pipe 12a
a and 34b are provided on the same axis, and injection guide pipes 35a and 35b for penetrating and supporting the middle pipe 12b are outlet ports 34a and 34b.
You may make it provide in a different direction so that it may communicate with b. In this embodiment, the injection guide tubes 35a, 35a
Although two b's are used, three or four b's may be arranged at equal intervals.

In addition, the guide plates 30 that extend in a direction orthogonal to the chains 15 and 15 are always provided with the tip openings 36 of the injection guide pipes 35a and 35b as the injection guide pipes 35a and 35b rotate.
The positions are adjusted so that they are located close to the front surfaces of a and 36b, and they are attached to the chains 15 and 15 so that the solidifying material is ejected into the gap formed at the moment when the guide plate 30 passes. By doing so, the solidifying material is supplied to the ground in a state of being dispersed in the guide plate 30 according to the left and right directions of the tip openings 36a and 36b, and is uniformly distributed to the ground by the rotating stirring blades 16. It can be mixed by stirring.

Further, the mounting position of the stirring blades 16 attached to the front surface of each stirring blade base 29 is set so that the adjoining stirring blade bases 29 fully fill the width direction of the stirring blade bases 29 as shown in FIG. Attach them by shifting the position. In addition, in FIG.
One set of stirring blades 29 is attached to the first one at the center position, the third one to the left and right end positions, the second to the first and third. By arranging one stirring blade 16 so as to be located in the middle of each stirring blade 16, the three stirring blades 29 are set as one unit, and the stirring blades 16 are evenly attached to the entire width of the stirring blades 29. ing. In this way, the stirring blades 16 arranged at different positions for each of the plurality of stirring blades 29 sequentially rotate to excavate without leaving the ground, and to continue stirring and mixing the ground and the solidifying material uniformly. be able to. Moreover, the load applied to each stirring blade 29 can be reduced. The ground improvement machine according to the first and second embodiments can be mounted on a mud stop or the like in addition to the backhoe.

[0028]

As described above in detail with respect to each of the embodiments, the ground improvement machine according to the present invention excavates the ground deeply by a large number of stirring blades that move as the chain vertically moves. The ground and the solidifying material which is always discharged downward and evenly in the left-right direction are uniformly stirred and mixed, and the ground can be improved uniformly. Further, the solidified material is constantly discharged downward, so that the solidified material is less likely to be scattered around even when the solidified material is pulled up on the ground, which reduces supply loss and also prevents pollution by dust. It also has an effect.

[Brief description of drawings]

FIG. 1 is a perspective view of a ground improvement machine according to an embodiment corresponding to claim 1. FIG.

FIG. 2 is a front sectional view of the same main part.

FIG. 3 is a sectional view taken along line XX of FIG. 2;

FIG. 4 is a bottom view of the same.

FIG. 5 is a development view of the rotary cylinder shaft.

FIG. 6 is a development view of the fixed cylinder shaft.

FIG. 7 is a bottom view of a main part according to the other embodiment.

FIG. 8 is a side sectional view of the same.

FIG. 9 is a development view of the fixed cylinder shaft.

FIG. 10 is a development view of a rotary cylinder shaft according to another embodiment.

FIG. 11 is a plan sectional view of a main part of a ground improvement machine according to another embodiment.

FIG. 12 is a perspective view of a ground improvement machine according to an embodiment corresponding to claim 2.

FIG. 13 is a plan sectional view of the same main part.

FIG. 14 is a plan sectional view of the same main part.

FIG. 15 is a side sectional view of the same main part.

FIG. 16 is a front view of the main parts for explaining the arrangement of the stirring blades according to the embodiment corresponding to claim 4.

FIG. 17 is a front view of a main part of a conventional ground improvement machine.

FIG. 18 is a perspective view of a conventional ground improvement machine.

[Explanation of symbols]

 4 machine frame 5 drive shaft 7,7 drive sprocket 11,11X fixed cylinder shaft 12,12a, 12X rotary cylinder shaft 14,14X driven sprocket 15,15X chain 16,16a, 16b, 16X stirring blade 17,17X solidification material pressure feed pipe 20, 20a, 20X Rotating slit groove 21, 21a, 21b, 20X Fixed slit groove 22 Intersection portion 29 Stirring blade base 30 Guide plate 32 Discharge port 35a, 35b Injection guide pipe 36a, 36b Tip opening

Claims (4)

[Claims] 1. A rotatable drive shaft having a pair of drive sprockets mounted on the upper part of a machine frame is horizontally mounted, and a fixed cylinder shaft that cannot rotate and a rotatable rotary shaft are provided on the lower part of the machine frame. A heavy-cylindrical support shaft is provided horizontally, a pair of driven sprockets are mounted on the outer periphery of the rotating cylinder shaft, and chains with agitating blades are mounted between the upper and lower sprockets. On the outer peripheral surface of the shaft, a fixed slit groove parallel to the central axis is provided between both ends of the lower surface, and on the outer peripheral surface of the rotary cylinder shaft, a desired shape is formed between both end portions, and the fixed slit groove is always provided at one place. A ground improvement machine characterized in that a continuous or discontinuous rotary slit groove is formed so that the solidified material supplied into the fixed cylinder shaft is discharged downward from the intersection of both slit grooves. 2. A rotatable drive shaft having a pair of drive sprockets mounted on the upper part of the machine frame is horizontally mounted, a fixed cylinder shaft is mounted horizontally on the lower part of the machine frame, and an outer periphery of the fixed cylinder shaft is mounted. A rotary cylinder shaft fitted with a pair of driven sprockets is attached to the chain, a chain having stirring blades is wound between the upper and lower sprockets, and a discharge port is provided at an appropriate position on the lower surface side of the fixed cylinder shaft. A plurality of injection guide pipes are attached to the rotary cylinder shaft in a radial direction at equal intervals, and the injection guide pipes communicating with each other when the front end openings are sequentially reversed and the base end openings match the discharge ports. A ground improvement machine characterized by arranging a horizontal guide plate which is located on the front side of the guide pipe in the rotating direction and which matches the tip opening of the guide pipe. 3. The guide plate is arranged in the chain so that the tip opening of the jet guide tube is positioned close to the front surface of the guide plate with the rotation of the jet guide tube, and the jet is ejected from the tip opening of the jet guide tube. The ground improvement machine according to claim 2, wherein the solidified material is jetted into a void formed at the moment when the guide plate passes. 4. A rotatable drive shaft having a pair of drive sprockets mounted on the upper part of the machine frame is horizontally mounted, and a fixed cylindrical shaft that cannot rotate and a rotatable cylindrical shaft that are rotatable are provided on the lower part of the machine frame. A heavy-cylindrical support shaft is provided horizontally, a pair of driven sprockets are mounted on the outer circumference of the rotating cylinder shaft, and chains are respectively wound between the upper and lower sprockets, and the chains are spanned orthogonally between these chains. By arranging plate-shaped stirring blades in a row and installing several stirring blades on the front surface of each of these stirring blades by shifting their positions relative to each other, the ground is made uniform over the entire width direction of multiple stirring blades. A ground improvement machine characterized by being able to excavate and stir.