JP2000240096A - Soil improving material feeding device for soil improving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably feed a soil improving material to a mixing container regardless of the turn of an upper revolving superstructure and to concurrently conduct the sediment excavating work and the soil improving work in parallel by installing a soil improving material storage container on a lower travel body side. SOLUTION: A soil improving material feed section is formed at a position on the slightly downstream side than the position where the sediment hopper 31 of a mixing container 21 is provided. The soil improving material feed section is provided with two sets of a soil improving material storage container 32 and a feeder 33 on both the right and left sides of the mixing container 21 to feed a soil improving material. The soil improving material storage containers 32 are fixed to a center frame 15 by brackets, spaces are arranged between crawler belts 14 and the frame 2a of the upper revolving superstructure 2, and screw conveyors are fitted inside to feed the soil improving material to feed ports side. The feeders 33 feeding the soil improving material to the mixing container 21 are connected below the feed ports, and the feeders 33 are provided with the feed ports above the mixing container 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil for excavating earth and sand at a civil engineering site or a construction site, and then improving the soil of the excavated soil and backfilling the soil to carry out construction such as ground reinforcement. More particularly, the present invention relates to a soil improvement material supply device provided on a lower traveling body of the soil improvement machine for supplying the soil improvement material to a mixing vessel for stirring and mixing the soil and the soil improvement material. Things.

[0002]

2. Description of the Related Art As a construction method for improving a soft ground to a strong ground, for example, a solidifying material such as lime or cement, or other soil quality improving materials is mixed with the soil constituting the ground and solidified. Such a configuration is conventionally known. This method is to excavate the soil that composes the ground to a predetermined depth, mix it uniformly with the soil improvement material for solidifying this soil, perform backfilling and leveling, and finally compact the soil. It is common to do. This soil improvement method requires a means for excavating the earth and sand, a means for supplying the soil improvement material, a means for uniformly mixing the excavated soil and the soil improvement material, and a means for leveling and compacting. .

[0003] In the soil improvement method, excavation means for earth and sand is required, and a hydraulic excavator can be generally used as the excavation means. The traveling means of the hydraulic shovel include a crawler type using a crawler belt and a wheel type having wheels. In general, the ground at a work site is soft and has uneven terrain. However, it is preferable to use a crawler type using a crawler belt as the traveling means in view of poor traveling conditions, the necessity of securing the stability of the vehicle body due to digging resistance, and the like.

[0004] An improved soil is produced by supplying a soil improvement material and uniformly mixing it with the earth and sand. The method of generating the improved soil is to scatter the soil improvement material after spraying the soil improvement material on the ground. There is a method of mixing earth and sand and a soil improvement material by stirring the mixture, and in recent years, a method of stirring and mixing using a mixing device has been widely used.

[0005] The mixing apparatus is provided with, at a minimum, a mixing vessel equipped with a stirring means and a means for supplying a soil improvement material. And earth and sand are thrown into a mixing container, and since earth and sand excavation is performed by a hydraulic shovel, earth and sand can be thrown directly into a mixing device from this hydraulic shovel. However, since the positional relationship between the excavation position of the excavator and the arrangement position of the mixing device constantly changes, it is necessary to deposit excavated earth and sand by a hydraulic excavator at a predetermined location and to take in the accumulated sediment. Is common.

As this type of mixing device, for example, one disclosed in Japanese Patent Publication No. 1-49538 is known. This mixing device is configured as a self-propelled mixing device including a sediment supply mechanism including a bucket for supplying sedimentary sediment, a mixing container and a supply unit for soil improvement material, and including wheel-type traveling means. The earth and sand supply mechanism is rotatable in a horizontal direction by a limited angle on the vehicle body. In addition, in this mixing container, after a certain amount of earth and sand and a certain amount of soil improvement material are charged, the mixture is stirred and stirred by stirring means.
The improved soil is produced by mixing, and is discharged to a predetermined position. Therefore, the treatment is performed in a batch system.

[0007] However, the mixing apparatus according to the prior art is a wheel-type running means, so that it cannot perform soil improvement processing on rough terrain or the like, and has a soil and sand supply mechanism. However, since excavation of earth and sand cannot be performed, a separate excavation machine for earth and sand, for example, a hydraulic shovel or the like is required, and since the processing is of a batch type using a mixing vessel, dissatisfaction remains in terms of processing efficiency and the like.

[0008] In view of the above points, the excavation mechanism for the earth and sand provided with the bucket and the earth and sand excavated by the excavation mechanism are put into a traveling vehicle in which the upper revolving structure is pivotably mounted on the lower traveling body having a pair of right and left crawler tracks. Japanese Unexamined Patent Publication No. Hei 10-317426 discloses a soil improvement machine with an excavation mechanism provided with a treatment unit for continuously producing an improved soil by uniformly mixing and stirring with a soil improvement material. I have.

In this soil improvement machine, the processing unit includes a mixing vessel and a screw conveyor provided in the mixing vessel and serving as a means for mixing and agitating the earth and sand and the soil improvement material. And the mixing container is installed on the lower traveling body side. The earth and sand excavation means is provided on the upper revolving body side, so that the earth and sand can be excavated by the excavation means and directly injected into the mixing vessel. Further, a soil improvement material storage tank is installed on the upper revolving structure side, and the soil improvement material is supplied from the soil improvement material storage tank into the mixing vessel. Therefore, the excavated soil supplied from the excavation means and the soil improvement material supplied from the soil improvement material storage tank are transferred while being stirred by the screw conveyor in the mixing vessel, and the soil and the soil improvement material are uniformly mixed. Stirred and mixed to produce improved soil. The improved soil is discharged by discharge means connected to the rear end of the mixing vessel.

[0010]

The above-described prior art soil improvement machine can continuously produce high quality improved soil uniformly excavated by excavating earth and sand and the soil improvement material. Since it is a running type and equipped with running means using crawler tracks, it has the advantage of being able to smoothly and easily perform soil improvement processing while freely traveling even at work sites where running conditions are poor, but this soil improvement is still Machines are not without their problems.

Since the mixing vessel provided in the soil improvement machine continuously performs the soil improvement processing, the processing can be continuously performed as long as the material is continuously supplied to the mixing vessel. Here, the materials to be put into the mixing container are earth and sand and a soil improvement material, and the earth and sand is soil generated by excavation. As the soil improvement material, for example, lime or cement is used. Since the soil improvement machine is equipped with a soil excavation means, the supply of the earth and sand to the mixing vessel is not interrupted as long as the excavation means is operated. On the other hand, since the soil improvement material is supplied from the soil improvement material storage tank,
When the soil improvement material storage tank is empty, it needs to be replenished. Therefore, the continuous operation time of this soil improvement machine is determined by the volume of the soil improvement material storage tank. For this reason, in order to make the continuous operation of the soil improvement machine as long as possible, the soil improvement material storage tank is increased in size. Therefore, the soil improvement material storage tank is provided on the upper rotating body side.

In order to continuously supply earth and sand to the mixing vessel, excavation and introduction of earth and sand are continuously performed by the excavation means. In this operation, it is necessary to rotate the upper rotating body. Here, since the mixing container is provided on the lower traveling body side and the soil improvement material storage tank is installed on the upper revolving structure, when the upper revolving structure turns, the soil improvement material cannot be supplied to the mixing container. I will. During operation of the mixing vessel, it is necessary to supply the soil conditioner almost continuously. Therefore, in order to reliably supply soil improvement materials,
If the turning angle of the upper turning body must be restricted, there is a problem that the excavation means may hinder the excavation of earth and sand.

The present invention has been made in view of the above points, and an object of the present invention is to dispose a storage container for soil improvement material on a lower traveling body side so as to prevent the upper revolving body from rotating. Another object of the present invention is to ensure that the soil improving material can always be reliably supplied to the mixing vessel.

[0014]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention relates to a lower traveling body having a track-type traveling means in which an upper revolving body provided with earth and sand excavation means is swingably connected and has a track type traveling means. And discharging the improved soil while mixing and stirring the soil and the soil improving material into a mixing vessel provided with a sediment inputting section into which the excavating means inputs the soil, a soil improving material supply section, and an improved soil discharging section. Soil improvement machine equipped with a soil improvement treatment means equipped with a conveyor with a stirring mechanism for transferring toward the part, and fixedly installed on the lower traveling body to supply the soil improvement material to the mixing container. It is characterized by comprising a soil improvement material storage container and a feeder connected to the soil improvement material storage container and supplying the soil improvement material to the mixing container.

Here, the soil improving material in the soil improving material storage container is sent to the feeder, and for this purpose, a screw conveyor for transferring the soil improving material toward the feeder is installed in the soil improving material storage container. Just do it. Also,
As the installation position of the soil improvement material storage container, the soil improvement material storage container is composed of a long container, and it is extended in the front-rear direction along the upper part of the crawler belt. It can be fixed to both left and right sides.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. Here, the excavation means provided in the soil improvement machine of the present invention has the same configuration as the excavation means of the hydraulic excavator. Therefore, the basic configuration of the soil improvement machine is the same as that of a conventionally known hydraulic excavator. The soil improvement mechanism is mounted without impairing the function of the hydraulic excavator and without particularly changing the configuration as the hydraulic excavator.

FIGS. 1 to 3 show the overall construction of the soil improvement machine of the present invention. As is apparent from these figures, a traveling vehicle is constituted by the lower traveling body 1 and the upper revolving superstructure 2, and the traveling vehicle includes an excavating machine 3 as an excavating means.
Are provided on the upper swing body 2. Also, the lower traveling body 1
A processing unit 4 is provided on the side, and an operator's cab 5 and a machine room 6 are provided on the upper revolving unit 2 side so as to substantially function as a hydraulic excavator. Equipment for driving the machine, such as a pump, is housed therein, and the operator's cab 5 is mounted on the cab 5 to operate the entire machine. And the upper revolving superstructure 2 can be revolved with respect to the lower traveling superstructure 1 by the revolving device 7.

The lower traveling body 1 has crawler-type traveling bodies 10 provided on the left and right sides. The traveling bodies 10 are composed of sprockets 12 and idlers 13 provided at both ends of a track frame 11, and these sprockets 12 and idlers 13 And a crawler belt 14 wound there between. And
The sprocket 12 is driven by a hydraulic motor (not shown). Also, the left and right track frames 11
Are connected by a center frame 15, and the turning device 7 is attached to the center frame 15. Here, the center frame 15 is bent downward at both ends of a horizontal portion where the turning device 7 is installed, and the track frame 11 is connected to both ends. Therefore, a large space is formed below the center frame 15.

The excavating machine 3 constitutes excavating means, and is connected to a boom 16 provided on the frame 2a of the upper swing body 2 so as to be capable of raising and lowering, and to a tip of the boom 16 so as to be vertically rotatable. It comprises an arm 17 and a bucket 18 rotatably provided at the tip of the arm 17.
The boom 16, the arm 17, and the bucket 18 are driven by hydraulic cylinders 16a, 17a, and 18a, respectively, to perform operations such as excavation of earth and sand.

The processing unit 4 has the structure shown in FIGS. First, as is clear from FIGS. 4 and 5, the processing unit 4 is provided with
And a mixing vessel 21 formed with a soil improving material supply section 20 (parts indicated by arrows in FIG. 4), and a discharge means 22 is connected to a rear end of the mixing vessel 21. The mixing container 21 is a relatively shallow container whose length in the length direction is longer than that in the width direction, and the upper surface and the rear end are open. The mixing container 21 is located below the center frame 15 in the lower traveling body 1 and is disposed substantially horizontally between the left and right crawler belts 14, 14.
As shown in FIG. 5, four screw conveyors 23 are provided in parallel as a conveyor with a stirring mechanism inside. These screw conveyors 23 are configured by providing paddles 23b on which the blades are intermittently provided at a predetermined angle with respect to the axis of the rotary shaft 23a. These four screw conveyors 23 have a length substantially covering the entire length of the mixing vessel 21, and paddles 23 b, 23 b of adjacent screw conveyors 23, 23 are inclined in opposite directions. 23b is extended to a position close to the rotation shaft 23a of the screw conveyor 23 adjacent thereto.

Each screw conveyor 23 has a mixing vessel 21
, And is driven by a hydraulic motor 25 mounted on a drive unit 24 having transmission means such as gears built therein. 6, the rear end of the mixing container 21 is covered with a cover member 26 over a predetermined length range, and a support hanger 27 is fixedly provided on the cover member 26, as shown in FIG. The support hanger 27 is provided with a bearing 28 that rotatably supports the rear end of the rotating shaft 23a.

The mixing container 21 having the above structure is fixedly held on the center frame 15 of the lower traveling unit 1.
Then, the mixing container 21 is supplied with earth and sand and a soil improvement material. For this purpose, the earth and sand input section 19 is located at one end.
However, a soil quality improving material supply section 20 is formed downstream of the earth and sand input section 19 and at a position close to the earth and sand input section 19. By operating the excavator 3, the earth and sand can be supplied by operating the excavator 3, and excavating the bucket 18 directly or temporarily, and then temporarily operating the excavator 3 again. For this purpose, a sediment hopper 31 having a predetermined capacity and equipped with a means (not shown) for sieving a sieve or the like is installed at the most upstream position of the screw conveyor 23 in the mixing container 21. Therefore, excavated soil is put into the sand hopper 31 and taken into the mixing container 21.

A soil improving material supply unit 20 is formed at a position slightly downstream of the position where the earth and sand hopper 31 is provided. In the soil improving material supply unit 20, the soil improving material is supplied to the mixing vessel 21. As shown in FIGS. 7 to 9, a soil conditioner storage container 32 and a feeder 33 are provided. These soil improvement material storage container 32 and feeder 33
Are provided on both sides of the mixing container 21. As is clear from FIG. 7, the soil improvement material storage container 32 is formed of a long container having a shallow bottom, and a screw conveyor 34 is mounted inside. The screw conveyor 34 is simultaneously driven in the same direction by a motor 35. The soil improving material is transported in a predetermined direction in the soil improving material storage container 32. In the present embodiment, FIG.
As shown in FIG. 2, two screw conveyors 34 are provided, and the bottom surface 32a of the soil improvement material storage container 32 is
The bottom surface 32a has a circular arc slightly larger than the rotation locus of the screw conveyor 34. As a result, almost all of the soil improvement material in the soil improvement material storage container 32 can be transferred in a predetermined direction by the screw conveyor 34 without fail. The soil-improving material storage container 32 is provided with a lid 32b that can be opened and closed to replenish the soil-improving material on a part of the upper surface thereof, and is provided at a lower position of the lid 32b. An outlet 32c is formed at the lower end of the circular arc portion at a position where the feeder 33 is connected, and the other portions are closed containers.

The feeder 33 is provided for storing the soil improving material storage container 32.
A screw conveyor 36 is provided inside the container, and the screw conveyor 36 is driven by a motor 37. Feeder 33
Extends substantially perpendicularly to the axis of the soil-improving material storage container 32 so as to substantially penetrate the lower end of the soil-improving material storage container 32, and has a mixing container 21 at the lower end thereof.
A supply port 33a that opens toward is formed. Although one supply port 33a is shown, a plurality of supply ports may be formed in order to uniformly supply the soil improvement material.

As shown in FIG. 9, the feeder 33 is fixedly provided on the lower surface of the soil improving material storage container 32, and is provided as a unit as a pair of left and right units. It is fixed to the side of. For this purpose, a pair of brackets 38 is provided on the side surface of each soil improvement material storage container 32, and these brackets 38 are fixed to the center frame 15 with bolts or the like. In this fixed state, as shown in FIGS. 1 and 3,
The soil conditioner storage container 32 is disposed above the left and right crawler belts 14 in a space formed below the frame 2 a in the upper revolving unit 2, and the feeder 33 is located slightly upstream from the position where the earth and sand hopper 31 is provided. Mixing container 2 on the side position
1 are extended toward the inside, and their tips are located at positions substantially close to each other. And both feeders 33
Of the four screw conveyors 23 installed in the mixing container 21 is open between the left and right two screw conveyors 23, 23.

Further, a discharge means 22 is connected to the rear end of the mixing vessel 21. This discharging means 22 is provided in FIG.
As is clear from FIG. 5, a screw 41 for transferring the improved soil is provided in the cylindrical main body 40,
The screw 41 is driven to rotate by a hydraulic motor 42. The main body portion 40 extends in a direction orthogonal to the traveling direction of the vehicle, and has an inflow opening 40a formed in a peripheral body portion thereof. Then, the cover member 2 in the mixing container 21
The rear end covered with 6 is connected so as to face the inflow opening 40a. The screw 41 is connected to a hydraulic motor 42
Blades 41 continuous with a rotating shaft 41a driven to rotate by
The improved soil guided from the mixing container 21 into the main body 40 of the discharging means 22 is transported by the rotation of the screw 41 in a direction perpendicular to the traveling direction of the vehicle, and the discharge port It is discharged from 40b and deposited at a desired location. The opening position of the discharge port 40b is located outside the crawler belt 14 constituting the lower traveling body 1, so that even when the vehicle is driven, the improved soil accumulated on the crawler belt 14 is not stepped on.

In performing soil improvement on a predetermined ground using the soil improvement machine configured as described above, an excavator 3 having a bucket 18 is provided as an excavating means, and a grounding machine is provided as a traveling means. Crawler track 14 with a large area
Therefore, two works can be carried out in parallel: a work of directly carrying the ground to be improved and a work of excavating the earth and sand and a work of improving the soil quality of the excavated soil. Here, the site where the ground improvement is performed is unleveled, and it is often extremely difficult or substantially impossible to travel with the wheel-type traveling means. Since the soil improvement machine according to the present invention employs the traveling body 10 using the crawler belt 14, the traveling vehicle can travel smoothly even in such a place where traveling conditions are poor.

By operating the excavator 3,
The earth and sand is excavated, and the excavated earth and sand is injected into the earth and sand input section 19. Here, when excavated soil is directly charged into the mixing vessel 21,
Since there is a possibility that rocks, concrete pieces, and other solids may be mixed in, it is desirable to temporarily place them in advance in order to remove the solids and the like in advance. In addition, by attaching a sieving means such as a sagger to the earth and sand hopper 31 installed in the earth and sand input section 19, the earth and sand can be selectively taken into the mixing vessel 21 even if the excavated soil is directly injected. Since four screw conveyors 23 are provided in the mixing container 21, the earth and sand charged by the rotation of the screw conveyor 23 is finely crushed and transferred toward the upstream side while being stirred.

Further, since the soil improving material is supplied into the mixing vessel 21 from the soil improving material supply container 32 installed in the soil improving material supplying section 20 through the feeder 33, the mixture is stirred by the paddle 23b of the screw conveyor 23. While being added to the earth and sand that is being transported, these materials are agitated and uniformly mixed. The earth and sand supplied to the mixing vessel 21 and the soil improvement material are transported toward the upstream side while being uniformly mixed by the rotation of the screw conveyor 23, and directed toward the discharge means 22 connected to the most upstream side thereof. And the main body 4 constituting the discharging means 22
It is discharged by the rotation of the screw 41 provided in the inner space and is deposited at a predetermined position.

Here, since the soil improving material supply section 20 is provided on the lower traveling body 1 side together with the mixing vessel 21, the excavating work machine 3 rotates the upper rotating body 2 when excavating the earth and sand. Also, the feed position of the soil improving material to the mixing container 21 by the feeder 33 does not shift. Therefore, the combined operation of the excavation of the earth and sand and the soil improvement processing can be simultaneously performed smoothly in parallel, and the inconvenience such that the soil improvement material escapes to the outside of the mixing vessel 21 does not occur. The space under the center frame 15 between the left and right crawler belts 14 is used as an installation space for the mixing container 21 in the lower traveling vehicle 1. Since the space wide in the length direction existing between and is used as an installation space for the soil-improving material storage container 32, the capacity of the soil-improving material storage container 32 can be increased. However, the soil improving material storage container 32 is horizontally long and cannot supply the soil improving material by its own weight. However, since the screw improving machine 34 is installed and forcibly transported, the soil improving material is not used. The whole amount can be supplied to the mixing container 21 without remaining in the soil improvement material storage container 32.

Here, the supply amount of the soil improving material to the mixing container 21 is primarily determined by the rotation speed of the screw conveyor 36 of the feeder 33, and the screw conveyor 34 of the soil improving material storage container 32 is also supplied by the feeding amount. Affect. These two screw conveyors 36 and 34 are respectively connected to the motor 3
7, 35, these motors 37, 35
By controlling the number of rotations, the supply amount of the soil improving material to the mixing vessel 21 can be controlled. Therefore, the motors 37 and 35 may be constituted by hydraulic motors, but are constituted by electric motors when the supply amount of the soil improvement material is finely controlled. As a result, the supply amount of the soil improvement material can be finely adjusted according to the amount of the earth and sand input to the earth and sand input portion 19, and the manufactured improved soil has a constant mixing ratio of the soil and the soil improvement material. And the quality is further improved.

The storage container 32 has a large capacity but a limited supply. Therefore, while the soil improvement process is continued, the soil improvement material will eventually be consumed. When the soil improving material storage container 32 becomes empty, the soil improving material is supplied to it. In this operation, the lid 32b provided on the upper surface of the soil improving material storage container 32 is removed and opened, and a new soil improving material is introduced. In addition, since the soil improvement material is generally supplied from a flexible container, when replenishing the soil improvement material,
A hopper member 39 is mounted on the opening, as shown by a virtual line in FIGS. 7 and 8, and the flexible container is accommodated in the hopper member 39.
In addition, it is desirable to provide a cutter for cutting the flexible container below the hopper member 39.

From the hopper member 39 to the soil improvement material storage container 3
When the soil improving material is supplied into the inside 2, the screw conveyor 34 is rotated in the reverse direction. As a result, the soil improvement material is transported, and the transport direction is opposite to the direction in which the soil improvement material is supplied to the mixing vessel 21, so that the soil improvement material storage container 32 composed of a horizontally long container is smoothly and reliably transferred to the whole. , And dead space or the like does not occur.
Therefore, the replenishment work of the soil improvement material can be easily performed.

[0034]

Since the present invention is constructed as described above, the soil improving material storage container is installed on the lower traveling body side, so that the soil improving material can be reliably mixed into the mixing container regardless of the turning of the upper rotating body. And the soil excavation work and the soil quality improvement work can be performed simultaneously and smoothly.

[Brief description of the drawings]

FIG. 1 is a front view of a soil improvement machine provided with a soil improvement material supply device according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG. 1 omitting an excavator.

FIG. 3 is a right side view of FIG. 1 omitting an excavator.

FIG. 4 is a diagram illustrating a configuration of a mixing container according to an embodiment of the present invention.

FIG. 5 is a plan view of FIG. 4;

FIG. 6 is a sectional view of a rear end portion of the mixing container.

FIG. 7 is a longitudinal sectional view of a soil improvement material supply device according to an embodiment of the present invention.

FIG. 8 is a sectional view taken along line XX of FIG. 7;

FIG. 9 is a plan view showing a mode of attaching the soil improving material supply device to the lower traveling body according to the embodiment of the present invention.

FIG. 10 is a front view illustrating a configuration of a discharging unit according to the embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving superstructure 3 Front working mechanism 4 Processing unit 19 Earth and sand input part 20 Soil quality improvement material supply part 21 Mixing container 22 Discharge means 23 Screw conveyor 31 Earth and sand hopper 32 Soil quality improvement material storage container 32b Cover part 33 Feeder 34, 36
Screw conveyor 35, 37 Motor

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Takami Kushiro 650, Kandamachi, Tsuchiura City, Ibaraki Prefecture Inside the Tsuchiura Plant of Hitachi Construction Machinery Co., Ltd. Inside Tsuchiura Factory

Claims (3)

[Claims] An upper revolving body provided with earth and sand excavation means, which is pivotably connected to the lower revolving body having crawler-type traveling means, wherein the earth and sand is introduced by the excavation means; Soil improvement means equipped with a conveyor with a stirring mechanism for transferring earth and sand and soil improvement material to the improved soil discharge section while mixing and stirring the soil and soil improvement material in a mixing vessel provided with a material supply section and an improved soil discharge section In the soil improvement machine equipped with, in order to supply the soil improvement material to the mixing container,
A soil improving material storage container fixedly installed on the lower traveling body, and a feeder connected to the soil improving material storage container and supplying the soil improving material toward the mixing container, Of soil improvement material for soil improvement machine. 2. A screw conveyor for transferring a soil improving material toward the feeder is installed in the soil improving material storage container.
A soil improvement material supply device for the soil improvement machine described in the above. 3. The soil-improving material storage container is formed of a long one extending in the front-rear direction along the crawler belt, and the soil-improving material storage container is provided on both left and right sides of a center frame of the lower traveling body. The soil improving material supply device for a soil improving machine according to claim 2, wherein the device is fixed to a portion.