JP2004076450A - Soil improving apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a soil improving apparatus capable of improving excavating, agitating and mixing performance and positively preventing a fault caused by reaction from excavating protrusions. <P>SOLUTION: This soil improving apparatus 30 is provided with endless locus circulating mechanisms 33, 34 for moving chains 39 serving as endless moving bodies protrusively provided with a large number of excavating protrusions, along a crawler. The chains 39 are juxtaposed in a pair in a nearly orthogonal direction to the self-advancing direction, and a pair of chains 39, 39 are movable in the same direction and different directions by each hydraulic motor 35. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a ground improvement device for improving a soft ground to a solidified ground of uniform quality or the like.
[0002]
[Prior art]
As a ground improvement method for soft ground such as wetlands, tidal flats, and dredged landfills, soft ground is improved into soft ground by mixing ground improvement materials such as solidifying materials and purifying agents with soft ground while stirring the soft ground. There is a ground improvement method. FIGS. 6 and 7 show a conventional ground improvement apparatus used in this ground improvement method.
[0003]
As shown in FIGS. 6A and 6B, the ground improvement device 1 has a device main body 3 arranged above the ground 2 and the device main body 3 is moved by a self-propelled mechanism (not shown) as shown in FIG. It is movable in the traveling direction of arrow A shown in a). Also, a cutter post 4 is vertically provided downward from the apparatus main body 3, and the cutter post 4 is provided with an infinite trajectory circulation mechanism 5.
[0004]
The infinite path circulation mechanism 5 includes a hydraulic motor 6 disposed at a position above the cutter post 4, a driving sprocket 7 rotated by the driving force of the hydraulic motor 6 and supported at a position above the cutter post 4, In the vicinity of the sprocket 7, a driven sprocket 8 rotatably supported by the cutter post 4, an idler 9 rotatably supported below the cutter post 4, and a drive sprocket 7, a driven sprocket 8, and an idler 9. And a chain 10 on which a number of excavating bits 10a (not shown) project outward. The moving direction of the chain 10 is the direction of the arrow B shown in FIG. 6 when viewed from the front side in the running direction A of the infinite path circulation mechanism 5.
[0005]
In addition, ground improvement material discharge ports 11 for discharging a ground improvement material such as a solidifying material or a purifying agent are provided at appropriate positions above and below the cutter post 4.
[0006]
In the above configuration, when the hydraulic motor 6 is driven, the chain 10 circulates vertically and a large number of excavating bits 10a protruding from the chain 10 excavate, agitate, and mix the ground 2A. Specifically, as shown in FIG. 6A, the excavating bit 10 a moves downward from above on the front side in the traveling direction A of the ground improvement device 1 and moves upward from below on the rear side of the traveling direction A. To excavate, agitate, and mix the ground 2A.
[0007]
Also, a ground improvement material (not shown) is discharged from the ground improvement material discharge port 11, and the ground improvement material is mixed with the ground 2A by being stirred with the ground 2A. The ground improvement device 1 is gradually moved in the direction of arrow A in FIG. 6A by a self-propelled mechanism (not shown) while stirring the ground 2A and mixing the ground improvement material with the ground 2A. The ground 2A that has passed through the ground improvement device 1 is improved into a hard ground by a ground improvement material.
[0008]
[Problems to be solved by the invention]
However, the chain 10 of the infinite path circulation mechanism 5 of the ground improvement device 1 circulates and moves in one direction (B direction), and a large number of excavation bits 10a excavate, agitate, and mix the ground 2A only from the same direction. In addition, there was a problem that the stirring and mixing performance was poor. In particular, when improving the ground at the L-shaped corner portion, the chain 10 (cutter post 4) had to be pulled out to the ground at the corner portion, and it was not possible to perform the construction continuously.
[0009]
Further, the excavating bit 10a protruding from the chain 10 circulates while receiving a reaction force from the ground 2A when stirring the ground 2A. This reaction force acts strongly on the excavation bit 10a moving up and down on the front side in the traveling direction A of the ground improvement device 1 and weakly on the excavation bit 10a moving up and down on the rear side of the traveling direction A. The excavation bit 10a moving on the front side excavates and agitates the ground 2A that has not yet been excavated and agitated, and the excavation bit 10a moving on the rear side agitates the ground 2A that has been agitated to some extent. Accordingly, an upward external force (in the direction of arrow E in FIG. 6A) acts on the ground improvement device 1 due to the reaction force received by the excavation bit 10a from the ground 2A, and the ground improvement device 1 is driven at a predetermined self-running speed. In such a case, there is a problem that the vehicle cannot travel, cannot move uniformly, and excavation and uneven stirring occur.
[0010]
Then, this invention is made in order to solve the above-mentioned subject, can improve excavation and agitation, mixing performance, and can prevent the malfunction by the reaction force from an excavation projection reliably. It is an object to provide a ground improvement device.
[0011]
[Means for Solving the Problems]
The invention according to claim 1 is a ground improvement apparatus provided with an endless track circulation mechanism for moving an endless moving body provided with a large number of excavation protrusions along an endless track, wherein the endless moving body of the endless path circulation mechanism is provided. Are arranged side by side in a direction substantially orthogonal to the self-running direction, and the pair of endless moving bodies are movable in the same direction and different directions by respective driving sources.
[0012]
With this ground improvement device, when a pair of infinite end moving bodies are moved in the forward and reverse directions, the excavation protrusion provided on the forward rotating infinite end moving body and the excavation provided on the reverse rotating infinite end moving body are provided. Since the projections excavate, agitate and mix the ground from opposite directions, the ground is sufficiently agitated and mixed, and the excavation projections provided on the infinite end movable body in the normal rotation direction and the infinite end movable body in the reverse rotation direction are provided. The excavation projection provided on the ground receives a reaction force in the opposite direction from the ground, so that the external force acting on the ground improvement device is sufficiently reduced as a whole. In particular, by moving the pair of infinite end moving bodies in the forward and reverse directions, the construction direction can be easily changed at the same position, for example, at an L-shaped corner portion, and continuous construction can be performed without pulling out the pair of infinite end moving bodies. It becomes possible.
[0013]
The invention according to claim 2 is the ground improvement device according to claim 1, wherein the pair of endless moving bodies is a chain.
[0014]
In this ground improvement device, in addition to the effect of the first aspect, the chain moves without slipping due to the transmitted rotation.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
FIG. 1 is a front view showing a ground hardening machine according to an embodiment of the present invention, FIG. 2 is a side view of the ground hardening machine, and FIG. 3 (a) is a side view of a ground improvement device used in the ground hardening machine. FIG. 3 (b) is a front view of the ground improvement device, FIG. 4 is an enlarged side view of an upper part of an infinite path circulation mechanism used in the ground improvement device, and FIG. FIG. 5 (b) is an explanatory view showing the use location of the ground improvement material discharge port when the rotation direction of the chain is counterclockwise, and FIG. 5 (b) is the use location of the ground improvement material discharge port when the rotation direction of the chain is counterclockwise. FIG.
[0017]
As shown in FIGS. 1 and 2, the ground consolidation construction machine 20 is provided with a pair of left and right caterpillar drive units 22, 22 below the construction machine main body 21, and each of the caterpillar drive units 22 is driven as shown in FIG. It can run in the A1 direction and the A2 direction. A vertical guide rail 23 extending vertically is provided on one side of the construction machine main body 21, and a horizontal guide rail 24 extending horizontally is slidably provided on the vertical guide rail 23. A ground improvement device 30 is slidably mounted on the horizontal guide rail 24.
[0018]
The ground improvement device 30 is vertically moved together with the horizontal guide rail 24 by a vertical movement hydraulic motor (not shown), and the vertical movement of the ground improvement device 30 can adjust the depth of the ground improvement device 30 under the ground. The ground improvement device 30 is horizontally moved in the horizontal A1 and A2 directions while being guided by the horizontal guide rails 24 by a horizontal movement hydraulic motor (not shown), and the horizontal movement allows the ground improvement device 30 to run by itself. ing. That is, the ground improvement device 30 is capable of self-propelling by driving the caterpillar driving unit 22 and driving the hydraulic motor for horizontal movement.
[0019]
As shown in FIGS. 3 (a) and 3 (b), the ground improvement device 30 has a device main body 31 disposed above the ground 2, and a cutter post 32 hangs downward from the device main body 31. Has been established. The cutter post 28 is provided with a pair of endless track circulation mechanisms 33 and 34, and the pair of endless track circulation mechanisms 33 and 34 are arranged in parallel in a direction substantially orthogonal to the self-running direction.
[0020]
As shown in FIGS. 3A, 3B and 4, each of the endless track mechanisms 33 and 34 includes a hydraulic motor (drive source) 35 disposed above the cutter post 32 and each of the hydraulic motors 35. The drive sprocket 36 is rotated in the same direction and in different directions of forward and reverse by the driving force of the drive sprocket 36 and is supported at a position above the cutter post 32, and is rotatably supported by the cutter post 32 in the vicinity of each drive sprocket 36. Two driven sprockets 37, 37, an idler 38 rotatably supported at a position below the cutter post 32, and are bridged between each drive sprocket 36, the two driven sprockets 37, 37, and the idler 38, and And a chain 39 as an infinite end moving body in which a number of excavating bits (excavating protrusions) 39a and stirring blades (not shown) are respectively protruded. To have.
[0021]
The pair of infinite locus circulating mechanisms 33 and 34 are controlled by the hydraulic motors 35 so that the moving directions of the respective chains 39 are the same in the forward rotation direction B1, and the moving directions of the respective chains 39 are different from each other. The driving is controlled so as to be in (forward rotation direction, reverse rotation direction B1, B2). Note that the forward rotation direction and the opposite reverse rotation direction are relative concepts, and in the present embodiment, when the rotation is viewed from the front side of the ground improvement device 30, the direction moving from the upper side to the lower side is the forward rotation direction. The direction of moving from below to above is the reverse direction.
[0022]
Also, as shown in FIG. 3A, ground improvement material discharge ports 40a, 40b, 40c, and 40d for discharging a ground improvement material such as a solidifying material or a purifying agent are provided at two locations above and below the cutter post 32, respectively. The ground improvement material can be selectively discharged from the ground improvement material discharge ports 40a, 40b, 40c, and 40d. The four ground improvement material discharge ports 40a, 40b, 40c, and 40d are located at two locations, a front side and a rear side, which are shallower and lower than the ground 2, and a front side and a rear side which are sufficiently deeper than the ground 2 below. The two ground improvement material discharge ports 40a, 40b, 40c, 40d to be used are set based on the rotation direction of each chain 39. That is, when the rotation direction of the chain 9 is counterclockwise, as shown in FIG. 5A, the ground improvement material discharge port 40a and the ground improvement material discharge port 40d are used, and the rotation direction of the chain 39 is clockwise. In the case of the direction, as shown in FIG. 5B, a ground improvement material discharge port 40b and a ground improvement material discharge port 40c are used.
[0023]
In the above configuration, the ground hardening machine 20 is arranged on the ground 2 to be ground-improved, and the ground continuous stirring device 30 is embedded in the ground 2A. When the hydraulic motors 35 of the pair of infinite path circulation mechanisms 33 and 34 are driven in this state, the pair of chains 39 and 39 circulate in the same direction, respectively, and a large number of excavations protruded from the pair of chains 39 and 39. The bit 39a excavates, agitates, and mixes the ground 2A. Specifically, as shown in FIG. 3B, each excavation bit 39 a provided on the pair of chains 39, 39 is in the same direction from the top to the bottom on the front side in the traveling direction A <b> 1 of the ground improvement device 30. It moves and moves in the same direction from the lower side to the upper side on the rear side of the traveling direction A1 to excavate, agitate, and mix the ground 2A.
[0024]
The ground improvement material is discharged from the ground improvement material discharge ports 40a and 40d, and is mixed with the ground 2A by being stirred with the ground 2A. While excavating and stirring the ground 2A and mixing the ground improvement material into the ground 2A, the ground improvement device 30 is gradually driven in the direction of the arrow A1 in FIGS. 2 and 3A by driving the horizontal movement hydraulic motor. Move to When the ground improvement device 30 moves to the front end of the horizontal guide rail 24, the hydraulic pressure of the horizontal movement hydraulic motor is released, and the pair of caterpillar drive units 22, 22 is driven. It moves in the direction of arrow A1 in FIG. At this time, the ground improvement device 30 cannot move forward due to the resistance from the ground 2A, and moves to the rear end of the horizontal guide rail 24 by relative movement with the horizontal guide rail 24. The ground improvement device 30 moves forward while alternately repeating the movement by the horizontal movement hydraulic motor and the movement by the pair of track driving units 22 and 22. Then, the ground 2A that has passed through the underground stirring device 30 is improved into a hard ground by the ground improvement material.
[0025]
Also, by moving one chain 39 of the pair of chains 39, 39 in the normal rotation direction, moving the other chain 39 in the reverse rotation direction, and moving adjacent chains 39 in different rotation directions, The excavation bit 39a provided on the one chain 39 in the normal rotation direction and the excavation bit 39a provided on the other chain 37b in the reverse rotation direction agitate the ground 2A from opposite directions. Can be agitated and mixed. Thereby, excavation, agitation, and mixing performance can be improved. Further, the excavation bit 39a provided on one of the chains 39 in the normal rotation direction and the excavation bit 39a provided on the other chain 39 in the reverse rotation direction receive reaction forces in opposite directions from the ground 2A. External force acting on the improvement device 30 can be sufficiently reduced. Thereby, a failure due to the reaction force from the excavation bit 39a can be reliably prevented.
[0026]
As described above, by making the pair of chains 39, 39 movable in the same direction and different directions by the respective hydraulic motors 35, the pair of chains 39, 39 are both moved in the normal rotation direction or the reverse rotation direction, respectively. In this case, the ground improvement of the soft ground can be easily and reliably performed while maintaining the straightness of the ground improvement device 30. When the pair of chains 39 is moved in the forward and reverse directions, respectively, the digging bit 39a provided on one chain 39 in the normal rotation direction and the digging bit 39 provided on the other chain 39 in the reverse rotation direction. 39a can excavate, agitate and mix the ground 2A from opposite directions, and can sufficiently agitate and mix the ground 2A. Further, by moving the pair of chains 39, 39 in the forward and reverse directions, the construction direction can be easily changed at the same position, for example, at an L-shaped corner portion, without pulling out the pair of chains 39, 39. Continuous construction can be performed.
[0027]
Furthermore, since the chain 39 is used as the infinite end moving body, the pair of chains 39, 39 move without slipping due to the rotation transmitted from each hydraulic motor 35, so that the uneven rotation caused by slip causes uneven stirring. Can be prevented. Incidentally, the infinite end moving body may be constituted by a belt or the like.
[0028]
In the above-described embodiment, the ground improvement device 30 is mounted on the ground solidification construction machine 20. However, the ground improvement device 30 may be of an attachment type.
[0029]
【The invention's effect】
As described above, according to the first aspect of the present invention, since the pair of endless moving bodies can be moved in the same direction and different directions by the respective driving sources, the pair of infinite end moving bodies move in the forward and reverse directions. Then, the excavation projection provided on the infinite end moving body in the normal rotation direction and the excavation projection provided on the infinite end moving body in the reverse rotation direction can excavate and agitate the ground from opposite directions, and can mix the ground. It can be sufficiently stirred and mixed.
[0030]
Further, by moving the pair of infinite end moving bodies in the forward rotation direction or the reverse rotation direction, the ground improvement can be performed easily and reliably while maintaining the straightness of the ground improvement device. Further, by moving the pair of endless moving bodies in the forward and reverse directions, for example, the construction direction can be easily changed at the same position such as an L-shaped corner portion, and the pair of infinite end moving bodies is pulled out. It can perform continuous construction without any.
[0031]
According to the invention of claim 2, since the chain is used as the infinite end moving body, the chain can be moved by the transmitted rotation without slipping, and the occurrence of rotation unevenness due to the slip is prevented to excavate and stir. , Mixing unevenness and the like can be reliably prevented.
[Brief description of the drawings]
FIG. 1 is a front view showing a ground solidification construction machine according to an embodiment of the present invention.
FIG. 2 is a side view of the ground hardening machine.
FIG. 3A is a side view of a ground improvement device used in the above-mentioned ground solidification construction machine, and FIG. 3B is a front view of the ground improvement device.
FIG. 4 is an enlarged side view of an upper portion of an endless path circulation mechanism used in the ground improvement device.
FIG. 5A is an explanatory view showing a use location of a ground improvement material discharge port when the rotation direction of the chain of the endless path circulation mechanism is counterclockwise, and FIG. It is explanatory drawing which shows the use location of the ground improvement material discharge port in the case of a direction.
FIG. 6A is a side view of a conventional ground improvement device, and FIG. 6B is a front view of the ground improvement device.
FIG. 7 is an enlarged side view of an upper portion of an infinite path circulation mechanism used in the conventional ground improvement device.
[Explanation of symbols]
30 ground improvement device 33,34 infinite trajectory circulation mechanism 35 hydraulic motor (drive source)
39,39 A pair of chains (infinite end moving body)

Claims (2)

In a ground improvement device equipped with an endless trajectory circulation mechanism that moves an endless moving object with a large number of excavation protrusions along an endless trajectory,
A pair of infinite end moving bodies of the infinite trajectory circulation mechanism are arranged side by side in a direction substantially orthogonal to the self-running direction, and the pair of infinite end moving bodies are movable in the same direction and different directions by respective driving sources. Ground improvement equipment. The ground improvement device according to claim 1,
The ground improvement device, wherein the pair of endless moving bodies is a chain.

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