JP5189223B1 - Ground improvement device - Google Patents

Abstract

[PROBLEMS] In addition to excavation even on hard ground, even if solids or lumps are mixed in the ground to be improved, they can be discovered and removed before reaching the agitator, To provide a ground improvement device that can effectively improve soil.
An apparatus main body 11 attached to a power shovel 20, a plurality of rippers 12 attached in the vertical direction of the apparatus main body 11 and arranged in parallel to each other, and disposed on the back side of these rippers 12. A stirrer 13 for crushing the mud that has passed between the rippers 12 and a drive unit 14 for driving the stirrer 13 are provided.
[Selection] Figure 3

Description

  The present invention relates to a device for improving the ground of a road, a parking lot, or a residential area, and in particular, is attached to a power shovel, a backhoe or the like instead of a bucket, and is used while utilizing a driving force of the power shovel or the like. The present invention relates to a ground improvement device.

  The term “ground improvement” is sometimes used to simply compact the ground soil by “rolling” it. In recent years, however, it has generally been used to increase the earthquake resistance and to suppress the liquefaction phenomenon of the ground. In addition, it is used to improve by mixing a cement-based, lime-based, or slag-based solidified material into the soil constituting the ground.

  For example, cement, which is a solidifying material, is often sprayed directly on the ground to be improved, and is often scattered by the wind. Regarding this problem, the applicant has proposed various “wet cement production / dispersion devices” and has been improved substantially.

  In addition, “stabilizers” and “trenchers” are known as devices for ground improvement and are still in use. Stabilizers are suitable for improving the surface of relatively large areas on the surface layer, and trenchers are constructed by attaching excavating blades to a solid chain in a conveyor-like and endless manner to improve the depth of the ground. It is suitable.

  In general, there are many roads, parking lots, shops and residential sites that require ground improvement, but these construction sites are close to walls of other structures or narrow spaces. Both stabilizers for the purpose of ground improvement and trenchers that improve the depth of the ground are not easy to use.

  For this reason, as what is suitable for improving the foundation and ground for civil engineering structures of a store or a house, there are some which are proposed by patent documents 1 and patent documents 2, for example.

Japanese Patent Laid-Open No. 5-346026, abstract, representative figure Japanese Patent No. 5015493, FIG.

  The “backhoe bucket structure” proposed in Patent Document 1 was made for the purpose of “making it possible to efficiently perform ground and soil improvement work such as soft ground by a backhoe”. As shown in the figure, “The soil conditioner supply port is provided in the bucket body, and the soil conditioner supply device can be supplied into the bucket body from the soil conditioner supply device through the soil conditioner supply port, and the excavated soil is stirred in the bucket body. It has a configuration of “provided with an agitation device”.

  Further, the “ground improvement device and ground improvement machine” proposed in Patent Document 2 is “to provide a ground improvement device and ground improvement machine that can efficiently improve the ground within a certain range”. As shown in FIG. 9, a ground improvement device 2 that is pivotally attached to the tip of an arm of a work machine and moves in the ground to improve the ground, in the thickness direction. Side frames 10 and 11 that are spaced apart are connected by an upper frame 13 and a lower frame 14 to form a substantially rectangular opening 18, and a gate type in which an attachment hole for an arm tip of a work machine is provided in the upper frame 13. A frame, side bids 10c, 11c, a base bid 14c projecting from the side frames 10, 11 and the lower frame 14 toward the opening direction of at least one of the openings 18, and a portal frame It includes a plurality of stirring blades 17 that rotate with the rotary shaft 16 extending in the direction orthogonal to the side frames 10 and 11 inside the opening 18 and stir the ground. .

  However, the “backhoe bucket structure” proposed in Patent Document 1 and the “ground improvement device and ground improvement machine” proposed in Patent Document 2 are both old in construction sites that require ground improvement. It is impossible to deal with solid foundations such as concrete foundation blocks and relatively large stones.

  This is because, in the “backhoe bucket structure” of Patent Document 1, the soil excavated by the “excavating blade 16” at the lower end of the bucket is agitated by the agitating blade 21 in the bucket. This is because in the “ground improvement device and improvement machine” ground proposed in Document 2, excavation and stirring of the ground are simultaneously performed by the “stirring blade 17”.

  In other words, in any of the techniques, when a hard lump that cannot be excavated is mixed in the ground, this causes the “excavating blade 16” (in the case of Patent Document 1) or “stirring blade 17” (in the case of Patent Document 2). ) Is immediately damaged, and the subsequent work cannot be performed. Further, in the techniques of Patent Documents 1 and 2, when the ground itself is very hard, excavation and agitation may not be performed by the rotation of the “excavation blade 16” or the “agitating blade 17”.

  Therefore, the present inventors can use the device even if the ground is hard, or the soil to be ground is mixed with solids that are not soil, such as old concrete foundation lumps or relatively large stones. The present invention has been completed as a result of various studies on how to stably advance the ground improvement without causing any damage to the ground.

  That is, the object of the present invention is not only to excavate the ground and to dissect the excavated soil, even if it is hard ground, even if solids are mixed in the ground to be improved. An object of the present invention is to provide a ground improvement device capable of performing a removing operation before reaching a stirring blade.

In order to solve the above problems, first, the means taken by the invention according to claim 1 will be described with reference numerals used in the description of the embodiments described later.
“A ground improvement device 10 attached to a power shovel or backhoe 20 in place of its bucket and excavating, crushing, and mixing with a soil improvement material,
The apparatus main body 11 attached to the excavator or the backhoe 20, the plurality of rippers 12 attached in the vertical direction of the apparatus main body 11 and arranged in parallel to each other, and disposed on the back side of these rippers 12, A ground improvement device 10 comprising a stirrer 13 for crushing mud that has passed between the rippers 12 and a drive unit 14 for driving the stirrer 13 ".
It is.

  That is, as shown in FIG. 1, the ground improvement device 10 according to claim 1 is attached to a power shovel or backhoe 20 (hereinafter simply referred to as a power shovel 20) instead of the bucket, and excavates the ground. , Crushing, and mixing with a soil improvement material. As shown in FIGS. 3 to 5, the apparatus main body 11 and the apparatus main body 11 are attached in the vertical direction and arranged in parallel to each other. A plurality of rippers 12, a stirrer 13 that is disposed on the back side of the rippers 12 and crushes the mud that has passed between the rippers 12, and a drive unit 14 that drives the stirrer 13. Is.

  The ground improvement device 10 attached to the power shovel 20 is driven by driving the power shovel 20 and its boom 21 and arm 22 while drawing a locus like an arc shown in FIG. In addition, power or pressure oil is supplied from a power shovel 20 to the driving machine 14 constituting the ground improvement device 10, and a ground improvement such as cement is provided in a pipe 17 described later in FIG. 2. Water for preventing scattering of the material or the solidified material 30 is supplied from the power shovel 20 side.

  The apparatus main body 11 is a part directly attached to the power shovel 20 in place of its bucket, and directly supports a ripper 12, a stirrer 13, a drive machine 14 and the like which will be described later. Of course, as shown in FIG. 3, the upper surface of the apparatus main body 11 is naturally provided with a connecting portion for connecting the arm 22, the cylinder 23 or the link of the power shovel 20.

  Further, as shown in FIGS. 4 and 5, side plates for determining the penetration width into the soil and supporting the stirrer 13 are provided on the left and right of the upper surface of the apparatus main body 11. The general shape of the main body 11 is a so-called “gate type”. That is, the front surface portion of the apparatus main body 11 is opened to receive the soil crushed by each of the rippers 12, and the rear surface portion is opened to discharge the soil stirred by the agitator 13. . In addition, the lower part of each side plate which comprises this apparatus main body 11 may be connected by the reinforcement member for maintaining the portal shape, and the rolling plate 15 mentioned later.

  Now, the ground improvement device 10 is used to improve the soil at the construction site. Before the work is performed, the cement material, lime-based, or slag-based solidifying material 30 is sprayed on the construction site. . The solidifying material 30 is mixed in the soil when the soil is excavated and pulverized by the operation of the ground improvement device 10, and also solidifies the pulverized soil by its own solidification. That is, the solidifying material 30 substantially improves the ground, and the ground improving device 10 according to the present invention effectively mixes the solidifying material 30 into the ground.

  Note that the reinforcing member and the rolling plate 15 provided at the bottom of the apparatus main body 11 are provided in an inclined state at the lower end of the apparatus main body 11 so that the tip is directed downward in order to receive the soil crushed by each ripper 12. The soil that has passed between the rippers 12 is received and can be guided below the stirrer 13. In addition, it is sufficient for the reinforcing member to prevent the spread of the side plates and to receive the soil that has passed between the rippers 12 and to guide the soil to the lower side of the stirrer 13. There is nothing.

  Now, when the ground improvement device 10 is moved by the power shovel 20 as shown in FIG. 1, each ripper 12 always faces the power shovel 20, and the tip of each ripper 12 faces the ground. It becomes. For this reason, if the excavator 20 is operated and the ground improvement apparatus 10 is moved so that the bucket just scoops up the soil, the tip of each ripper 12 will pierce into the ground which needs soil improvement. Here, if there is no lump of concrete, stone, or the like in the ground, the ground improvement device 10 is not subjected to any impact. Therefore, the excavator 20 confirms that and further penetrates the ground improvement device 10. It is drawn toward the front side (power shovel 20 side).

  When the ground improvement device 10 penetrates and pulls, the soil is first “unraveled” by the penetration of each ripper 12 and the movement of each ripper 12. And in this ground improvement apparatus 10, if the stirrer 13 is made into the drive state by the drive machine 14, the soil sent into the apparatus main body 11 from between each ripper 12 will be previously crushed on the ground. Mixing with the solidified material 30 that has been dispersed is performed. As a result, the solidified material 30 is uniformly mixed from the right side to the left side in FIG.

  Here, the ground improvement device 10 is used even when the ground to be soil-improved is relatively hard soil that cannot be unraveled or crushed by a single operation of the ground improvement device 10. Therefore, the ground improvement work can be easily performed.

  As described above, when the ground improvement device 10 is moved by the power shovel 20, the tip of each ripper 12 is first directed to the ground. Here, when the power shovel 20 is further operated to move the ground improvement device 10, the tip of each ripper 12 pierces to a predetermined depth in the hard ground and stops. Since further piercing is impossible for the hard ground, this time, the excavator 20 is operated and the ground improvement device 10 is once pulled toward the front side of the excavator 20 so that each ripper 12 is pierced. The soil is unraveled by each of the rippers 12 to a certain depth and pulverized by the agitator 13.

  It is very useful in terms of the function of the ground improvement device 10 that the excavation and unraveling of the soil by each ripper 12 and the pulverization and stirring by the stirrer 13 are performed. This is because the original function of the ground improvement device 10 is to mix the solidifying material 30 in the soil to be improved and to improve the quality of the ground by the solidifying action of the solidifying material 30. The soil is dug and unraveled, mixed with the solidifying material 30 at that time, and further pulverized and stirred by the stirrer 13, so that the mixing of the solidifying material 30 into the soil becomes sufficient and uniform. Because. If the solidifying material 30 is sufficiently and evenly mixed in the soil, the soil will be sufficiently and evenly improved.

  Next, the ground improvement device 10 is returned to the original position, and each of the rippers 12 is pierced into the hard ground described above again to perform soil improvement at a predetermined depth for the second time. By repeating this, soil improvement is performed to the target depth even on hard ground. During this time, the hard soil is unraveled and pulverized to some extent by each of the rippers 12, so that the stirrer 13 is not burdened.

  Of course, as shown in FIGS. 4 and 5, each of the rippers 12 is provided in parallel with each other on the front side of the apparatus main body 11, so that there is no problem in piercing the hard soil surface with a predetermined depth at the tip thereof. As long as the soil surface is not a block of concrete or stone, the soil improvement work can be performed stably.

  By the way, when a lump such as concrete or stone is present on the surface of the ground or in the work as described above, each of the rippers 12 cannot be pierced. Each of the rippers 12 is pierced, and the ground improvement device 10 is pulled to the near side by the power shovel 20. Thereby, since the lump of the surface is received by each ripper 12 and pulled, it will not interfere with the work if it is moved to a place where it does not interfere with the work.

  On the other hand, when there is a lump in the ground, the lump by each ripper 12 is stopped by this lump. In this case, the same operation as in the case of the hard ground may be performed. Accordingly, the soil on the surface of the lump is crushed while being scraped off, and the lump appears on the surface. Therefore, the work may be moved to a place where it does not get in the way by the above-described operation.

  As described above, when the ground improvement device 10 is pulled to the near side by the power shovel 20, a lump of concrete or stone caught by each ripper 12 is drawn while remaining on the near side of each ripper 12. In other words, the other soil is directed to the stirrer 13 from between the rippers 12 while being crushed by the respective rippers 12. The soil is mixed with the solidifying material 30 as described above, but when the ground improvement device 10 is lifted on the near side, a lump of concrete, stone, or the like appears on the ground in a state where the litter 12 remains on the soil. become.

  As a result, since the lump of concrete or stone does not collide with the stirrer 13 in the apparatus main body 11, the stirrer 13 is protected. In addition, about the lump of concrete, stone, etc. which existed on the surface or the part close | similar to this, before the soil crushing operation | work by the ground improvement apparatus 10, operation of a work is performed by pushing operation of the ground improvement apparatus 10 as shown in FIG. It can also be moved to a place where it does not get in the way.

  Of course, when there is a lump of concrete or stone in the soil, the tip of each ripper 12 collides with the lump of concrete or stone and the further operation of the excavator 20 becomes impossible. It can be seen that a lump exists under each ripper 12. At that time, the ground improvement device 10 is lifted up a little and pushed to the other side (the side opposite to the power shovel 20) as it is to retreat from the lump. Thereafter, if the ground improvement device 10 further penetrates the soil, the lump remains on the front side of each ripper 12 and is dug up, and at the same time, the mixing of the solidifying material 30 into the soil is completed.

  The soil mixed with the solidifying material 30 is stepped and solidified by the power shovel 20 or is subjected to predetermined rolling pressure by using a rolling plate 15 or the like described later, and the soil improvement work is completed. To do.

  Therefore, the ground improvement device 10 according to claim 1 can not only excavate even the hard ground, but also removes a stirring blade (stirring) even if solids or lumps are mixed in the ground to be improved. The removal work can be performed before reaching the machine 13), and the soil can be improved effectively.

In order to solve the above-mentioned problem, the means taken by the invention according to claim 2 is the ground improvement device 10 according to claim 1,
“The rolling plate 15 is arranged below the device body 11”
It is.

  As shown in FIG. 3, the rolling plate 15 is provided below the apparatus main body 11, and extends over the entire width of the lower end portion of the apparatus main body 11 as shown in FIGS. 4 and 5. is there. Further, as shown in FIG. 3, the tip of the rolling plate 15 is directed toward the rear of the tip of each ripper 12 with a slight gap, and slightly above the tip of each ripper 12. It is intended to be located.

  Further, as shown in FIG. 3, the entire rolling plate 15 is provided in an inclined state at the lower end portion of the apparatus body 11 so that the tip is directed downward, and receives the soil that has passed between the rippers 12. It can also guide below the stirrer 13.

  Furthermore, as shown in FIG. 3, the rolling plate 15 according to an embodiment to be described later is provided with a large number of protrusions 15 b on the lower surface. These protrusions 15 b prevent soil from adhering to the back surface of the rolling plate 15.

  Now, the ground improvement device 10 according to claim 2 provided with the above-described compaction plate 15 moves this as shown in FIG. 6 so as to naturally “push” the soil backward by the compaction plate 15. It is possible to perform “soil correction” and “rolling” from above.

  That is, the ground improvement device 10 having the rolling plate 15 can be moved up and down by the power shovel 20 from above the portion after the soil is crushed at the construction site and the stirring of the solidified material 30 is completed. The rolling plate 15 located on the lowermost side can perform rolling pressure on the surface of the agitated soil. Rolling is a process of driving the soil from the top, and this is the “consolidation” of the soil. If the ground improvement device 10 is moved in the horizontal direction by operating the power shovel 20, the “smoothing” of the soil can be performed by the rolling plate 15 or the like.

  Therefore, the ground improvement device 10 according to claim 2 can perform the same function as that of the above claim 1 and can also perform the rolling of the agitated soil by the rolling plate 15.

As described above, in the present invention,
“A ground improvement device 10 attached to a power shovel or backhoe 20 in place of its bucket and excavating, crushing, and mixing with a soil improvement material,
The apparatus main body 11 attached to the excavator or the backhoe 20, the plurality of rippers 12 attached in the vertical direction of the apparatus main body 11 and arranged in parallel to each other, and disposed on the back side of these rippers 12, It was equipped with a stirrer 13 for crushing the mud that had passed between the rippers 12 and a drive unit 14 for driving the stirrer 13 "
Therefore, even if it is hard ground, not only can it be excavated, but even if solids or lumps are mixed in the ground to be improved, these reach the stirrer 13 Therefore, it is possible to provide the ground improvement device 10 that can perform the removal work before the soil removal and can effectively improve the soil.

It is a side view which shows a mode that the soil improvement work is performed by the ground improvement apparatus 10 which concerns on this invention. 3 is a side view illustrating a range in which the ground improvement device 10 is moved by a power shovel or a backhoe 20. FIG. It is an enlarged side view of the ground improvement device. It is an enlarged rear view of the ground improvement device. It is an enlarged front view of the ground improvement device. It is a side view which shows a mode that the ground improvement apparatus 10 which has the rolling plate 15 is performing a rolling operation. Each ripper 12 which comprises the ground improvement apparatus 10 is shown, (a) is a front view, (b) is a rear view. It is a rear view which shows the technique shown by patent document 1. FIG. It is a rear view which shows the technique shown by patent document 2. FIG.

  Next, regarding the invention according to each claim configured as described above, the ground improvement device 10 which is the embodiment shown in the drawings will be described. In FIG. 1, the ground improvement device 10 penetrates into the soil, It shows the state of digging and raising the soil, crushing and stirring the soil. FIG. 2 shows a range and a state in which the ground improvement device 10 is moved by the power shovel 20.

  As shown in FIGS. 1 to 3, the ground improvement device 10 is attached to a power shovel or backhoe 20 in place of its bucket, and a device main body 11 directly attached to the power shovel 20, and the device main body 11. A plurality of rippers 12 that are attached in the vertical direction of the lippers 12 and arranged in parallel with each other, a stirrer 13 that is disposed on the back side of the rippers 12 and crushes the mud that has passed between the rippers 12, and this And a drive unit 14 for driving the stirrer 13.

  As the power shovel or backhoe 20 (hereinafter, simply referred to as power shovel 20), a commercially available one is generally used. As shown in FIG. The main body is equipped with a driver's seat that is driven by a caterpillar and rotates freely. A boom 21 is attached to the main body, and an arm 22 that moves up and down with respect to the boom 21 is connected to the tip of the boom 21. The boom 21 and the arm 22 are supplied with a driving fluid such as hydraulic oil. It is freely operated on the main body side by a cylinder 23, a link, etc. supplied from the main body. Therefore, the ground improvement device 10 according to the present invention connected to the power shovel 20 is inserted into the soil like a bucket provided in a general power shovel 20 as shown in FIGS. Or the soil will be pulled or scooped up or pushed away.

  The apparatus main body 11 has a portal shape that is attached to the excavator 20 in place of a general bucket employed in the excavator 20, and the upper portion of the apparatus main body 11 wraps and protects two driving machines 14 to be described later. It has a box shape. A connecting portion for connecting the arm 22, the cylinder 23, or the link of the excavator 20 is formed on the top plate of the box-shaped upper portion of the apparatus main body 11.

  On the other hand, in the lower part from the box-shaped upper part of the apparatus main body 11, as shown in FIG. 3, the soil dug up by each of the rippers 12 is received or the soil crushed and stirred by the stirrer 13 is discharged. In addition, it has become open. Further, the apparatus main body 11 may have a bottom plate for receiving the soil dug up by each ripper 12, but in the apparatus main body 11 of the present embodiment, instead of the bottom plate, a rolling plate 15 is provided. May be provided.

  Furthermore, in the apparatus main body 11 of this embodiment, as shown in FIGS. 3-5, the side cutter 16 is integrally provided in the lower part of the side plate. These side cutters 16 cut the soil while defining the excavation width when the apparatus main body 11 penetrates into the soil, and cut and crush the soil to be improved.

  And as shown also in FIG. 3, this apparatus main body 11 is provided with piping 17, This piping 17 is from the soil stirred by the solidification material 30 and the stirrer 13 which were sown in the construction place. Water for preventing the dust from rising, and for example, cement milk in which the solidifying material 30 is liquefied is supplied. One of the pipes 17 is connected to a pipe from a tank provided on the power shovel 20 side, and the other is connected to a pipe directed to a nozzle that opens in or around the ground improvement device 10.

  In front of the front opening of the apparatus main body 11, as shown in FIGS. 3 and 5, a plurality of rippers 12 are arranged in parallel in the vertical direction. As shown in FIG. 7, these rippers 12 are connected to each other by a plurality of lateral connecting plates 12a, and by connecting the ends of the connecting plates 12a to the device main body 11 side, It is made integral with the main body 11.

  In addition, as shown in FIG. 7, each ripper 12 is integrated with a connecting plate 15a for a rolling plate 15 to be described later, and the lower ends of these connecting plates 15a are shown in FIG. As shown in b), the rolling plate 15 is connected.

  The intervals between the rippers 12 can be set as appropriate, but in the case of the present embodiment, when the entire width of the apparatus main body 11 is 1600 mm, the distance is set to 200 mm to 300 mm. In this way, most of the soil mass dug up by each of the rippers 12 can be passed through the apparatus main body 11, and there is no need to pass a mass of concrete or stone having a size exceeding these intervals. The damage to the stirrer 13 can be reduced as much as possible. Of course, the distance between the rippers 12 can be appropriately changed in consideration of the performance of the agitator 13 and the desired size of the excavated soil, and the minimum is about 100 mm and the maximum is about 400 mm.

  In the ripper 12 of this embodiment, as shown in FIGS. 3 to 5 and 7, a tooth 18, a so-called claw, is attached to the lower end. The tooth 18 can be easily pierced into the soil and at the same time protects the ripper 12 and is replaceable. Of course, the tooth 18 is not necessarily required if the lower end of each ripper 12 is sufficiently hard and has sufficient durability for the piercing work into the soil.

  A stirrer 13 for further crushing the excavated soil is installed in the apparatus main body 11 that is inside the above ripper 12. The stirrer 13 in this embodiment is rotationally driven by a driving machine 14 such as a motor installed in the upper part of the apparatus main body 11, and both ends of the rotation support shaft are connected to the apparatus main body 11. The stirrer 13 has a large number of pulverizing blades attached around the rotation shaft, and the pulverization of the soil that has been fed into the apparatus main body 11 by rotating these pulverizing blades. Is what you do. In addition, these pulverization blades having different sizes are prepared so that the diameter of a circle drawn by the pulverization blade can be changed.

  In the ground improvement apparatus 10 of this embodiment, as shown in FIGS. 3 to 5, a rolling plate 15 is attached to the lower end portion of the apparatus body 11. As described above, the rolling plate 15 is integrated with each ripper 12 via the connecting plate 15a, and is consequently attached to the apparatus main body 11.

  Further, as shown in FIGS. 4 and 5, the compaction plate 15 extends over the entire width of the lower end portion of the apparatus main body 11, and the tip of the compaction plate 15 is shown in FIG. In this way, the rear end of each ripper 12 is directed with a slight gap and is positioned slightly above the front end of each ripper 12.

  Further, as shown in FIG. 3, the entire rolling plate 15 is provided in an inclined state at the lower end portion of the apparatus main body 11 so that the tip is directed downward, and receives the soil that has passed between the rippers 12. Thus, it is possible to guide it below the stirrer 13. In the rolling plate 15 of this embodiment, as shown in FIG. 3, a large number of protrusions 15b are provided on the lower surface. These protrusions 15 b prevent soil from adhering to the back surface of the rolling plate 15.

  Now, the ground improvement device 10 provided with the above-described rolling plate 15 can receive the excavated soil fed from between the rippers 12 by the rolling plate 15 and discharge it backward, as shown in FIG. The agitation soil can be rolled as shown in Fig. 1.

  That is, the ground improvement device 10 having the rolling plate 15 can be moved up and down by the power shovel 20 from above the portion after the soil is crushed at the construction site and the stirring of the solidified material 30 is completed. The rolling plate 15 located on the lowermost side can perform rolling pressure on the surface of the agitated soil. If the ground improvement device 10 is moved in the horizontal direction by operating the power shovel 20, the “smoothing” of the soil can be performed by the rolling plate 15 or the like.

DESCRIPTION OF SYMBOLS 10 Ground improvement apparatus 11 Apparatus main body 12 Ripper 12a Connecting plate 13 Stirrer 14 Drive machine 15 Rolling plate 15a Connecting plate 15b Protrusion 16 Side cutter 17 Piping 18 Tooth 20 Power shovel or backhoe 21 Boom 22 Arm 23 Cylinder 30 Solidification material

Claims (2)

A ground improvement device that is attached to a power shovel or backhoe in place of its bucket and performs ground excavation, crushing, and mixing with a soil improvement material,
The apparatus main body attached to the power shovel or the backhoe, a plurality of rippers attached in the vertical direction of the apparatus main body and arranged in parallel to each other, and disposed on the back side of these rippers, passing between each ripper A ground improvement device comprising a stirrer for crushing the mud and the drive unit for driving the stirrer.   The ground improvement device according to claim 1, wherein a rolling plate is disposed below the device main body.

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