JPH1133381A - Fluidizing treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly and efficiently perform an operation for uniformly stirring and mixing the content consisting of earth and sand, water and a solidifying agent in a fluldizing treatment tank by using small-sized lightweight stirring blades in an on-vehicle type fluidizing treatment apparatus limited in its arranging space or wt. SOLUTION: The stirring and mixing means 26 mounted on a fluidizing treatment tank 20 has a rotary shaft 27 and a plurality of the stirring blades 28 provided to the lower end part of the rotary shaft 27 and the rotary shaft 27 is rotationally driven by a hydraulic motor 29. The vibration mechanism 31 composed of the hydraulic actuator 50 provided to the piston 52 moved up and down by the rotation of the rotary shaft 27 provided in a cylinder block 51 is connected across the output shaft 29a of the hydraulic motor 29 and the rotary shaft 27. The stirring blades 28 are vibrated up and down while rotated to uniformly stirr and mix the earth and sand, water and solidifying agent charged in the fluidizing treatment tank 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluidizing apparatus used for fluidizing and refilling soil generated by excavation at a civil engineering site or a construction site.

[0002]

2. Description of the Related Art When laying city gas pipes or sewage pipes under a road, a pavement layer such as asphalt is first peeled off, and a pipe burial space is secured by excavating to a predetermined depth. Pipes will be installed in this space. Then, after the earth and sand are backfilled, compaction is performed, and pavement is performed thereon again. Here, depending on the geological layer or the like on which the pipe is laid, there is a case where soil generated by excavation cannot be used for backfilling. In this way, if the excavated soil cannot be used for backfilling as it is, the earth and sand is removed from the work site and discarded, and instead, high-quality backfilling soil is newly imported. Then, the excavated portion was backfilled. However, in recent years, there has been a tendency to have a shortage of places to dispose of the generated soil, and even if there are places or facilities that can be disposed or treated, there are cases where the places are far away from the work site. Many of them, therefore, have to be transported to such a remote place, which is costly and time-consuming, which makes disposal and disposal troublesome, has problems such as dump pollution, and obtains good-quality backfill soil. However, there is a problem that it is always difficult to access and it is necessary to carry in from a remote place.

[0003] In consideration of the above points, in recent years, the so-called fluidized backfill method for improving the soil quality of soil generated by excavation and changing the soil into soil suitable for backfill has been developed and put into practical use. It has become to. This fluidized backfill method is to mix the generated soil with water and a solidifying agent at an appropriate mixing ratio and stir to change the material into a slurry backfill that has been fluidized and uniformly mixed. None, the fluidized soil is backfilled at the excavation site. In this fluidized backfill method, the soil generated by excavation can be used for backfilling even poor quality soil such as the Kanto loam layer and sludge, and the backfill material is in a fluid state, Since the wraparound of the buried object becomes smooth, it is possible to prevent the occurrence of defective backfilling due to the congestion of the buried object and eliminate the need for compaction, thereby speeding up the work and suppressing the generation of noise and vibration. There are advantages such as. Here, as the solidifying agent, cement, cement-based solidifying agent, lime, lime-based solidifying agent, cement-lime composite-based solidifying agent is mainly used, and other additives are added to adjust the fluidity and the solidifying time. An agent and a mixture are appropriately added. As the water, tap water or industrial water can naturally be used, but river water, rainwater or the like may be used.

[0004] In order to produce the above-mentioned fluidized treated soil, not only the generated soil but also a solidifying agent and water must be readily available. Further, unless the mixing ratio of the generated soil, water and the solidifying agent is strictly set, good quality as a backfill material cannot be obtained. Further, it is necessary to remove foreign matters and lumps from the generated soil, and to appropriately stir the mixture. From the above, a considerably large-scale facility is required as the fluidization treatment apparatus, and such a facility is fixedly installed at a predetermined place. Therefore, the soil generated at the work site is transported to this facility by a dump truck or the like to perform fluidization processing, and the processed backfill material is again transported to the work site by a mixer truck or the like. Must be.

[0005]

Aside from large-scale sites such as communal trenches and shield tunnels, relatively small-scale construction sites such as those where gas pipes are buried along roads, etc. The amount of excavation and backfill of earth and sand is small. In addition, simplicity and speed of backfill work are required on roads and the like with heavy traffic, and it is not preferable that dump trucks, mixer trucks and the like frequently enter and leave. From the above, even if the processing capacity is limited, a small fluidization processing device is mounted on a vehicle such as a truck or a trailer, and is brought close to the work site,
If the generated soil can be fluidized, it will be convenient for small-scale construction as described above. Especially,
If the fluidization processing apparatus itself is of a self-propelled type, it is further advantageous that the fluidization processing can be performed at a position very close to the place where backfilling is performed as the construction progresses. Furthermore, if a crawler-type traveling body equipped with crawler tracks is used as a vehicle traveling means, it is possible to travel even on uneven work sites due to excavation, etc., which is optimal for performing a simple fluidization processing method. Becomes

[0006] In the fluidization treatment, it is necessary to completely and uniformly mix the generated soil, water and the solidifying agent. It is very difficult to perform the process, so that a batch-type process is performed.
For this purpose, a fluidization treatment tank is installed on the undercarriage, and means for stirring and mixing the generated soil, water, and the solidifying agent, which are contents, are provided in the fluidization treatment tank. In order to minimize the stirring resistance of the rotary stirring mechanism, water is first injected into the fluidization tank, and then the generated soil is put into a mud state or a slurry state.
It is common to mix a solidifying agent. In order to increase the production efficiency of the fluidized treated soil, the capacity of the fluidized treatment tank is increased, and the generated soil and the solidifying agent are quickly charged, and the stirring and mixing are performed at a high speed. Therefore, it is necessary to use a high-power rotary stirring mechanism. However, in the case of a self-propelled fluidization treatment device, the capacity of the fluidization treatment tank that can be installed is limited due to space, weight, etc., In addition, there is a limitation in the structure of the rotary stirring mechanism, and a rotary stirring mechanism that can quickly and efficiently mix the generated soil, water, and the solidifying agent completely and uniformly cannot be used.

The present invention has been made in view of the above points, and an object of the present invention is to use a small rotary stirring mechanism to quickly and efficiently generate soil in a fluidization tank. And water and the solidifying agent can be uniformly stirred and mixed.

[0008]

In order to achieve the above-mentioned object, according to the present invention, a fluidization treatment tank is installed on a chassis, and earth and sand, water and a solidifying agent are charged into the fluidization treatment tank. Wherein the stirring and mixing means comprises a rotary stirring mechanism for stirring the contents of the fluidization tank and a vibration mechanism for vertically vibrating the contents. This is the feature.

Here, the rotary stirring mechanism constituting the stirring and mixing means comprises a hydraulic motor, a rotary shaft driven to rotate by the hydraulic motor, and a stirring blade connected to the rotary shaft. Can be integrated with the rotary stirring mechanism, or can be configured as a separate mechanism. In order to integrate the rotary stirring mechanism and the vibration mechanism, for example, a hydraulic actuator may be used to move the stirring blade up and down by a predetermined stroke during rotation of the stirring blade of the rotary stirring mechanism. . Here, a specific hydraulic actuator is provided between an output shaft and a rotary shaft of a hydraulic motor, and is connected to a cylinder block to which the output shaft is connected, and is provided in the cylinder block to reciprocate at a predetermined stroke. It consists of a moving piston and a fixed cylinder in which a cylinder block is rotatably inserted. Between the fixed cylinder and the cylinder block, upper and lower chambers defined by the piston are connected to a hydraulic source. A switching port for switching connection with the tank may be provided, and the rotation shaft may be connected to the piston. On the other hand, when the vibration mechanism is configured as a mechanism separate from rotary stirring, for example, the vibration mechanism includes a vibration member inserted into the fluidization processing tank together with the rotation stirring mechanism, and a driving member that moves the vibration member up and down. What is necessary is just to comprise.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. First, FIG. 1 shows a schematic configuration of a fluidization processing apparatus. In the figure, 1 is a fluidization tank and 2 is a stirring and mixing means. First, FIG.
As shown in FIG. 1, water W is supplied to the fluidization tank 1 in advance, and in this state, the generated soil G is put into the fluidization tank 1 as shown in FIG. This generated soil G
It is preferable to remove lump such as rocks and foreign matter such as metal before charging. In addition, the operation of adding the generated soil G is started, and at the same time, the operation of the stirring and mixing means 2 is started to stir and mix the water W and the generated soil G. In this way, by simultaneously performing the charging of the generated soil G and the stirring by the stirring and mixing means 2, the water W and the generated soil G can be mixed smoothly.

While the generated soil G is added to the water W, the contents of the fluidization tank 1 are stirred by the stirring and mixing means 2 so that the generated soil G and the water W are uniformly mixed to form a slurry. After the generated soil G is adjusted in water content as described above, while the stirring by the stirring and mixing means 2 is continued, as shown in FIG. The solidifying agent S is uniformly mixed with the slurry S, and the contents are stirred by the stirring and mixing means 2 to make the whole completely uniform. As a result, soil that is not suitable for backfill, such as the Kanto loam layer, can be converted into an effective backfill material, and the excavated portion can be backfilled with the soil generated by excavation. Moreover, the backfill material is a fluidized soil, which solidifies in about 1 to 24 hours after backfilling, so that it can be easily wrapped around the buried object and requires compaction. And not. In addition, since the strength after solidification can be adjusted by the mixing ratio of the solidifying agent, it is possible to excavate the backfilled place again. Here, the mixing ratio of the generated soil G, the water W, and the solidifying agent S varies according to the properties of the generated soil G, the water content, and the like. It is preferable to keep it.

The generated soil is fluidized as described above. This fluidized processing apparatus is installed in a traveling vehicle as shown in FIG. 2 to FIG. It is configured as the apparatus 10, and it is possible to take in the soil generated by excavation at the work site, subject it to fluidization processing, and then directly bury it at the excavation site. Here, as the vehicle, a crawler-type traveling vehicle equipped with crawler tracks is exemplified,
The traveling means does not necessarily have to be a crawler type, but may be a vehicle provided with a traveling means such as a wheel type.

As is apparent from these figures, the traveling means is a crawler traveling body 1 having a pair of right and left crawler tracks.
The vehicle body frame 12 is connected to the crawler type traveling body 11. The crawler type traveling body 11 is provided with a driving sprocket 14 and an idler 15 at both ends of a traveling body frame 13 composed of a pair of right and left, and a crawler track 16 forming an infinite rail is provided between the driving sprocket 14 and the idler 15. It is provided by winding. Therefore, by driving the left and right driving sprockets 14, the entire vehicle runs on its own.

The body frame 12 is a crawler type traveling body 11
The vehicle body frame 12 can be turned by the turning device 18. On the vehicle body frame 12, a power unit 19 is provided at a position on the front side with respect to the turning center R, and a fluidization processing tank 20 is provided on the rear side so as to balance the weight. A driver's seat 21 for an operator to sit on and operate the machine is provided at an upper position of the power unit 19, and an operation lever and the like are mounted near the driver's seat 21. By operating these operation levers, each part can be operated.

The fluidization tank 20 is composed of a cylindrical member having a bottom.
An overhanging portion 20a is provided to the rear of the vehicle, and a scalloped sieving unit 25 is detachably attached so as to cover a predetermined range of the upper portion of the processing tank 20 from the overhanging portion 20a. The portion of the sieving unit 25 is a portion for charging earth and sand. The sieving unit 25 is provided with a sieve 25b formed by bridging a bar or mounting a grid on an upper portion of a frame-shaped main body 25a, and is configured to dig up rocks or other solid matter or metal on excavated soil. This is for removing large foreign substances from entering the fluidization tank 20 when other foreign substances are mixed. Therefore, if necessary, the main body 25a of the sieving unit 25 can be moved in the horizontal direction, and the sieving unit 25 can be reciprocated in the horizontal direction using reciprocating means such as a hydraulic cylinder or a hydraulic motor. It can also be configured to promote the fall of earth and sand.

As is apparent from FIG. 4, the fluidization tank 20 is provided with a stirring and mixing means 26. The stirring and mixing means 26 includes a rotating shaft 27, a plurality of stirring blades 28 extending at a lower end of the rotating shaft 27 in a direction perpendicular to the axis thereof, and a speed reducer for rotating the rotating shaft 27. And an agitating mechanism including the hydraulic motor 29.
However, the rotary shaft 27 is not directly connected to the output shaft 29a of the hydraulic motor 29, but a vibration mechanism 31 is connected via a coupling member 30.
Is connected to a rotary shaft 27. Thereby, while the rotating shaft 27 rotates, the rotating shaft 27 moves up and down by a predetermined stroke by the vibration mechanism 31. The hydraulic motor 29 is mounted on the mounting plate 32. The mounting plate 32 includes a pair of support members 33, 33 formed in a gate shape.
The supporting members 33, 33 are formed of a pair of upper and lower plate members connected so as to bridge between them.
2 stands. Therefore, all members constituting the stirring and mixing means 26 are supported by the vehicle body frame 12, and
The stirring blade 28 is held at a predetermined position near the bottom surface in the fluidization tank 20.

At the upper part of the fluidization tank 20, a portion where the above-mentioned sieving unit 25 is mounted and a mounting plate 3
Except for the portion covered by 2, a lid 34 is attached, and a water supply pipe 35 is provided in the lid 34 so as to penetrate therethrough. The water supply pipe 35 is formed of a pipe curved in an L-shape, and an end directed downward passes through the lid 34 and faces the inside of the fluidization tank 20. The horizontal portion is connected to the support member 33 and has an on-off valve 36.

The lid 34 is provided with an opening / closing door 34a. By opening the opening / closing door 34a, a solidifying agent can be introduced. The solidifying agent is accommodated in a solidifying agent container 37 having an open top, and by inverting the solidifying agent container 37 with the open / close door 34a open,
The solidifying agent can be charged into the fluidization tank 20. Here, since the solidifying agent container 37 containing the solidifying agent has a considerable weight, the structure is such that the charging operation is automated.

For this purpose, the solidifying agent container 37 is held by an L-shaped reversing member 38 by a holder 38a, and the reversing member 38 is turned over to a horizontal portion of a support rod 39 erected on the vehicle body frame 12. It is connected as possible. A hydraulic cylinder 40 is pivotally mounted between the lower surface of the reversing member 38 and the vehicle body frame 12. When the reversing member 38 is reversed around the support rod 39 by the hydraulic cylinder 40, the solidifying agent container 37 is inverted, and the solidifying agent is supplied into the fluidization tank 20.

Further, a pipe 41 for supplying fluidized soil is attached to the lower side of the fluidized vessel tank 20. The supply pipe 41 is formed of a hard pipe having an on-off valve 42, and a hose 43 is connected to a distal end thereof. In addition, an inspection port 44 is provided at a lower position of the fluidization processing tank 20.
Reference numeral 4 denotes an openable and closable door. Therefore, after the fluidization treatment is performed, solids remaining in the fluidization treatment tank 20 can be removed and the inside can be cleaned.

As described above, the fluidization treatment is performed by using the fluidization treatment device 10. In this fluidization treatment, the treated soil as the contents of the fluidization treatment tank 20, the water and the solidifying agent are uniformly dispersed. Need to mix. The contents are agitated and mixed by the agitation / mixing means 26. The agitation / mixing means 26 is downsized so that the contents can be quickly and uniformly mixed. Stir the contents
Mixing is basically performed by rotating the stirring blade 28, but in order to further promote stirring and mixing of the contents, the stirring blade 28 is vibrated up and down by a predetermined stroke during rotation. I have.

In order to move the stirring blade 28 up and down, a hydraulic actuator 50 shown in FIGS. 5 to 9 is used. As shown in FIG. 5, the hydraulic actuator 50 includes a cylinder block 51 having a circular cross section. The cylinder block 51 includes a shaft 30a of the coupling member 30 connected to the output shaft 29a of the hydraulic motor 29.
Are connected and fixed. A cylinder chamber is formed in the cylinder block 51, and a piston 52 that moves up and down along the inner wall of the cylinder chamber is provided in the cylinder chamber. The cylinder 52 is moved by the piston 52 into two upper and lower chambers 53a and 53b. The compartment is formed. A rod portion 52a provided on the piston 52 and extending upward is connected to an insertion hole 54 formed in the cylinder block 51 by means of a spline or the like so as to be relatively non-rotatable and displaceable in the vertical direction. Have been.
On the other hand, a rotary shaft 27 to which a stirring blade 28 is connected is connected to the lower end of the piston 52 integrally or via a predetermined coupling member. 27 moves up and down by a predetermined stroke.

The cylinder block 51 includes a piston 52
A pair of flow paths 55a, 55b, and 5 always communicate with the upper and lower chambers 53a, 53b defined by
6a and 56b are formed, and these flow paths are formed on the outer peripheral surface of the cylinder block 51 in the rotational direction and have input and output ports 57a and 57 having a predetermined angle of 180 ° or less.
b, 58a, 58b. The chamber 53a,
One of the flow passages 55a, 56a communicating with 53b extends straight in the radial direction of the cylinder block 51, while the other flow passage 55b, 56b is turned upside down so as to intersect in the middle. I have. Therefore, the four ports provided on the outer peripheral surface of the cylinder block 51 include one port 57a communicating with the upper chamber 53a.
Is on the upper side, and the other port 58b changes the phase by 180 °, and is open on the lower side. Also, one port 57b communicating with the lower chamber 53b is open on the lower side, and the other port 58a is also open on the upper side at a position 180 ° out of phase with the port 57b.

The cylinder block 51 is rotatably disposed as a fixed cylindrical body fixed to the support plate 33 in a cylinder casing 59 formed in an annular shape. The cylinder casing 59 is provided with a high-pressure port 61 to which pressure oil from a hydraulic pump 60 is supplied and a low-pressure port 63 communicating with a tank 62. When the cylinder block 51 rotates, while the high-pressure and low-pressure ports 61 and 63 are in communication with the ports 57a and 57b, respectively, the upper chamber 53a is at a high pressure and the lower chamber 53b is at a low pressure. The piston 52 descends.
When the cylinder block 51 rotates and the high-pressure and low-pressure ports 61 and 63 communicate with the ports 58a and 58b, respectively, the upper chamber 53a has a low pressure, and the lower chamber 53b has a high pressure. Rise. Therefore, the port 5 provided in the cylinder block 51
7a, 57b, 58a, 58b and high and low pressure ports 61, 63 provided in the cylinder casing 59 form high and low pressure switching ports, and the piston 52 is rotated during one rotation of the cylinder block 51. One stroke is required.

The fluidization processing apparatus 10 according to the present embodiment
Is constructed as described above. For example, when digging a gutter on a road, arranging a sewer pipe in the gutter, and performing construction work for embedding this sewer pipe, it is shown in FIG. Thus, the hydraulic excavator 70 and the dump truck 71 are used. The hydraulic excavator 70 is for excavating earth and sand, and for this purpose, a front working mechanism 73 having a bucket 72 is provided. In addition, dump truck 7
Numeral 1 is for temporarily placing the excavated earth and sand on the bed 71a and for carrying out excess earth and sand.
A water tank 74 is placed on a.

First, as shown in FIG. 10A, excavation is performed by a hydraulic excavator 70, and the soil generated by the excavation is placed on a bed 71a of a dump truck 71. Here, temporary placement by the dump truck 71 is not always necessary, but temporary placement is preferably performed in order to remove solid foreign substances such as clumps such as rocks and metals from earth and sand in advance. Then, for example, a fume pipe 75 is arranged at the excavation point.

When a required amount of earth and sand is deposited on the dump truck 71, the fluidization processing device 10 is run to a position close to the dump truck 71. In this state, first, the water supply hose from the water tank 74 installed on the loading platform 71a of the dump truck 71 is connected to the water supply pipe 35 and the on-off valve 36 is opened, whereby the fluidization processing tank 20 is opened.
Is supplied with water. Here, the opening / closing operation of the opening / closing valve 36 may be manually performed, but if the opening / closing valve 36 is configured to be opened / closed by a hydraulic pilot type, the operator can automatically control the driver's seat 21. When a predetermined amount of water is supplied into the fluidization tank 20, the water supply is stopped.

Therefore, as shown in FIG.
The excavator 70 is operated to take out the earth and sand from the bed 71a of the dump truck 71, and the fluidized tank 2
Enter 0. The injection of the earth and sand is performed by supplying the earth and sand to the sieving unit 25 by the bucket 72 of the hydraulic excavator 70. At this time, in order to prevent the bucket 72 from colliding with the hydraulic motor 29, the earth and sand is directly injected. It is preferable to connect the protection plate 45 to the sieving unit 25 serving as a charging section to be charged. When the charging of the earth and sand is started, the operation of the stirring and mixing means 26 is started. That is, the hydraulic motor 29 is operated to rotate the output shaft 29 of the hydraulic motor 29. Accordingly, the rotation shaft 27 rotates around the axis, and the stirring blade 28 provided in connection with the rotation shaft 27 rotates. At the same time, since the vibration mechanism 31 operates, the stirring blade 28 moves up and down while rotating. As a result, the entire contents of the fluidization tank 20 can be agitated simply by providing the plurality of agitating blades 28 at the end of the rotating shaft 27, and the agitation efficiency is improved.

While the rotation and the vertical movement of the stirring blade 28 continue while the earth and sand are continuously charged, the earth and sand are sequentially injected until the amount of the earth and sand reaches a predetermined amount. As a result, the earth and sand are uniformly mixed with the water, and a mud state or a slurry state is obtained. Then, when the degree of mixing of the earth and sand with water progresses to some extent, or when the earth and sand is completely dissolved, the opening / closing door 34a provided on the lid 34 is opened, and the hydraulic cylinder 40 is operated.
The reversing member 38 is reversed, and the solidifying agent is charged from the solidifying agent container 37 into the fluidization processing tank 20. During this time, the rotation and the vertical movement of the stirring blade 28 are continued. As a result, the added solidifying agent can be evenly dispersed in the mixture of the slurry and the earth and water, whereby the fluidized soil can be obtained.

Incidentally, a large amount of earth and sand is charged into the fluidization treatment tank 20, and water is added to form a slurry liquid.
Further, a solidifying agent is also mixed, and these fluidization tanks 2
The contents in 0 are agitated and mixed. The contents have high viscosity, and a large reaction force is generated at the time of agitation. In addition, the contents are filled to a considerable depth in the fluidization processing tank 20 in order to quickly perform the fluidization processing. For this reason, in order to stir uniformly over substantially the entire inside of the fluidization processing tank 20, not only the tip of the stirring blade 28 needs to be extended to a position near the inner wall surface of the fluidization processing tank 20, but also the height is high. In order to apply the stirring force to a predetermined range in the vertical direction, it is necessary to change the position in the axial direction of the rotating shaft 27 and attach the stirring blade. However, if a large number of stirring blades are provided on the rotating shaft 27, the weight increases and the load at the time of rotation increases, so that the hydraulic motor 29 must be increased in size. However, the stirring blade 28 not only rotates, but also moves up and down during rotation to apply vibration to the entire contents.
Even if the number of the stirring blades 28 connected to the tank is reduced, the entire inside of the fluidization processing tank 20 can be stirred quickly and efficiently, and the resistance at the time of stirring is reduced. Can be used. As a result, the whole structure of the stirring and mixing means 26 is made small and compact,
In addition, the weight can be reduced.

As described above, in the fluidization treatment tank 20, an optimal fluidization treatment soil can be obtained as a backfilling material using poor quality soil. Become. This backfilling is performed as shown in FIG.
As shown in the figure, the hose 43 is connected to the supply pipe 41 connected to the fluidization processing tank 20, and the on-off valve 43 is opened. Treatment device 10 as close as possible to the excavation point. Since the running is performed by the crawler track 16, even if there is unevenness on the ground, the running can be performed without any particular trouble.
Even if 6 slightly protrudes from the step, the balance of the entire vehicle will not be lost, so that the fluidized soil can be supplied at a position near the excavation point.

After backfilling of the fluidized soil as described above, there is a time lag depending on the mixing ratio of water and the solidifying agent, the weather, etc., but the fluidization takes about 1 hour to 1 day. The treated soil will solidify. Therefore, after sufficient solidification, the road can be restored by paving on it or the like. In addition, since the soil improved by the fluidization treatment is backfilled, there is no possibility that the soil will wrap around the fume pipe 75 and generate voids and the like. There is no fear. Of course, if the mixing ratio of the solidifying agent is appropriately adjusted, if excavation is necessary again, excavation can be performed with a hydraulic shovel or the like.

[0033] By making the fluidization treatment device 10 self-propelled, the fluidization treatment device 10 is carried into the work site, and the soil generated by excavation at the most appropriate position is fluidized. Since it can be back-filled at the excavation point, the speed of operation is ensured. Therefore, it is possible to smoothly and quickly perform burying work such as piping on a road with a large traffic volume.
In addition, since the mixing ratio of the generated soil, water and the solidifying agent can be adjusted accurately, extremely high quality fluidized soil can be produced. In particular, when the amount of soil generated by excavation is small, the entire fluidization treatment device 10 can be reduced in size. Therefore, pipe burial work on narrow roads where large vehicles such as dump trucks and mixer trucks cannot be carried. It is very advantageous to perform the above. In performing the fluidization processing at the site, a hydraulic excavator and a dump truck are used in addition to the fluidization processing apparatus 10, but aside from a machine such as a hydraulic excavator that excavates earth and sand, for example, excavation is performed. If the excavated soil is supplied as it is to the sieving unit 25 or the excavated excavated soil is piled up to remove foreign substances such as lump or metal, a dump truck is not required. Further, the water supply does not have to be performed from the water tank 74, but can be obtained from tap water, a reservoir, or the like.

The drive sprocket 14 for driving the left and right crawler belts 16 constituting the crawler type traveling body 11 is rotated, the body frame 12 is turned by the turning device 18, the rotation shaft 27 of the stirring and mixing means 26 is rotated, and further solidified. Agent container 3
Driving such as reversal of 7 is performed by a hydraulic actuator. Further, since the vibration mechanism 31 for moving the stirring blade 28 up and down is also constituted by a hydraulic actuator, it is installed in the power unit 19 and can perform all the driving by the pressure oil supplied from the hydraulic pump driven by the engine. Become like Therefore, the configuration of the drive mechanism is simplified.

Further, as shown in FIG. 11, the hydraulic motor 80 is directly connected to a rotating shaft 82 which is connected to a stirring blade 81,
The stirring blade 81 itself may be configured to perform only rotation, and one or more vibrating means 83 attached to the support plate 33 may be provided in the fluidization processing tank 20 as a vibration mechanism. Here, as the vibration means 83,
A shaft 86 having a vibrating member 85 protruding from a reciprocating drive means 84 such as a hydraulic cylinder, a hydraulic motor, or an electric motor.
May be connected to be provided. With this configuration as well, the contents of the fluidization tank 20 can be agitated by the agitating blades 81 and the vibration can be applied by the vibrating means 83 as in the above-described embodiment. Stirring and mixing can be performed.

[0036]

As described above, according to the present invention, as a mechanism for stirring and mixing the contents in the fluidization tank, a stirring mechanism and a vibration mechanism are used in combination. An operation to uniformly stir and mix the contents consisting of earth and sand, water, and solidifying agent in a fluidization treatment tank using a small and lightweight stirring blade with an on-board fluidization treatment device that has a limited weight. And the like can be performed quickly and efficiently.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the principle of a fluidization treatment method.

FIG. 2 is a front view of a self-propelled fluidization apparatus showing one embodiment of the present invention.

FIG. 3 is a plan view of a fluidization processing tank.

FIG. 4 is a sectional view taken along line XX of FIG. 3;

FIG. 5 is a cross-sectional view showing an example of a vibration mechanism in the stirring and mixing means.

FIG. 6 is a side view of the cylinder block of FIG. 5 as viewed from the left side.

FIG. 7 is a side view of the cylinder block of FIG. 5 as viewed from the right side.

FIG. 8 is a sectional view taken along the line YY of FIG. 6;

FIG. 9 is a sectional view taken along the line ZZ in FIG. 6;

FIG. 10 is an operation explanatory view showing a procedure of a pipe burying operation performed by using the self-propelled fluidization apparatus.

FIG. 11 is a structural explanatory view of a stirring and mixing means showing another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Self-propelled fluidization processing apparatus 12 Body frame 20 Fluidization processing tank 25 Sieving unit 26 Stirring / mixing means 27, 82
Rotating shaft 28,81 Stirrer blade 29,80
Hydraulic motor 31 Vibration mechanism 32 Mounting plate 33 Support member 35 Water supply pipe 37 Solidifying agent container 50 Hydraulic actuator 51 Cylinder block 52 Piston 53a, 53b Chamber 55a, 55b, 56a, 56b Channel 57a, 57b, 58a, 58b, 61, 63 Port 61 Hydraulic pump 62 Tank 70 Hydraulic excavator 71 Dump truck 83 Vibration means 84 Reciprocating drive means 85 Vibration member 86 Shaft

Claims (6)

[Claims] 1. A fluidization treatment tank is installed on a chassis, and earth and sand, water and a solidifying agent are charged into the fluidization treatment tank and stirred and mixed by stirring and mixing means.
The fluidization processing apparatus, wherein the stirring and mixing means includes a rotary stirring mechanism for stirring the contents of the fluidization processing tank and a vibration mechanism for vertically vibrating the contents. 2. The flow according to claim 1, wherein the rotary stirring mechanism includes a hydraulic motor, a rotary shaft driven to rotate by the hydraulic motor, and a stirring blade connected to the rotary shaft. Processing equipment. 3. The fluidizing apparatus according to claim 2, wherein the vibration mechanism moves the stirring blade up and down by a predetermined stroke while the stirring blade of the rotary stirring mechanism is rotating. . 4. The fluidization processing apparatus according to claim 3, wherein the vibration mechanism is constituted by a hydraulic actuator that moves the rotary shaft up and down. 5. The hydraulic actuator according to claim 1, wherein the hydraulic actuator is provided between an output shaft of the hydraulic motor and the rotary shaft, and is connected to the cylinder block to which the output shaft is connected. It comprises a reciprocating piston and a fixed cylinder in which the cylinder block is rotatably fitted. Between the fixed cylinder and the cylinder block, there are two upper and lower partitions defined by the piston.
5. The fluidization processing apparatus according to claim 4, wherein a switching port for switching and connecting the chamber between a hydraulic source and a tank is provided, and the rotating shaft is connected to the piston. 6. The vibration mechanism according to claim 1, wherein the vibration mechanism includes a vibration member inserted into the fluidization tank together with the rotary stirring mechanism, and a driving member that moves the vibration member up and down. Fluidization equipment.