JPH11217847A - Liquefaction treatment equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To charge soil and sand into a liquefaction treatment tank under the state, in which soil and sand are separated from a solid body surely, without installing screening means in the liquefaction treatment tank and a car body frame on which the liquefaction treatment tank is to be mounted, when soil and sand are excavated and charged into the liquefaction treatment tank for mixing and agitating the excavated soil and sand and water and a solidification agent. SOLUTION: The liquefaction treatment equipment has a boom set up to a front revolving frame fitted to a car body frame in a derrickable manner and an arm rotatably connected at the front end of the boom in the vertical direction, a connecting member is installed to the arm, and a bucket 40 for charging soil and sand, on which both ends of a bottom plate 43 are fixed and attached, is set up to the side plates 41, 42 as front attachments. A screen section 44 consisting of a mesh, in which metallic rib materials are arrayed crosswise, is mounted in an opening formed at approximately the central section of the bottom plate 43, a shaft 45 is borne rotatably between the left-right side plates 41, 42, scraping-off pawls 46 are connected and fitted to the shaft 45, and the shaft 45 is rotated and driven by a hydraulic motor 48.

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 is a place where disposal and treatment can be performed and facilities exist, it is a remote place that is significantly away from the work site There are many. Therefore,
Since it has to be transported to a remote place by a dump truck or other transportation means, it is costly and time-consuming, which makes disposal and disposal troublesome, and there is a problem of dump pollution, etc. May not always be available at hand, and there is still a problem that it needs to be carried 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. No, 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 manufacture the above-mentioned fluidized soil, it is necessary to accurately set the mixing ratio of the generated soil, water and the solidifying agent, and to mix them uniformly. Solids such as rocks, metals, and glass may be buried in the excavated earth and sand. In performing the fluidization treatment, these solids must be removed from the excavated earth and sand. If solids are mixed, not only can stirring not be carried out smoothly, but also if the mixing ratio of earth and sand, water and solidifying agent is controlled by weight, accurate detection of this mixing ratio cannot be performed. And the like. In order to separate and remove solid matter from excavated earth and sand, a sieving device is required, and the earth and sand after removing the solid matter must be uniformly mixed with water and a solidifying agent by a stirring device. As a fluidization treatment device, a rather large-scale facility was installed, and the soil generated at the work site was carried into this facility by a dump truck or the like, and the fluidization treatment was performed. The backfill material was transported to the work site again by a mixer truck or the like.

[0005]

By the way, aside from large-scale sites such as common trenches and shield tunnels, relatively small-scale works such as burying gas pipes along roads, etc. At the site, 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 a large traffic volume, 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 treatment device is mounted on a vehicle such as a truck or trailer, brought into the vicinity of the work site, and the generated soil is fluidized. If processing can be performed, it will be convenient for small-scale construction as described above. In particular, if a crawler-type traveling body equipped with crawler tracks is used as traveling means, traveling can be performed even on uneven ground due to digging and the like, so that fluidization processing can be performed at a position very close to the place to be backfilled. It is even more advantageous.

[0006] As a fluidization treatment device, a fluidization treatment tank is installed on a self-propelled vehicle body, and the soil generated by excavation is charged, and the soil is uniformly mixed with water and a solidifying agent. The fluidization tank is provided with a stirring means. When excavating earth and sand, solids such as rocks, metals, glass, and other foreign substances may be contained. If it is put into a fluidization tank as it is, the solids, etc. will hinder the smooth stirring. In addition, the volume of the fluidization tank cannot be effectively utilized by the amount of the solid matter. In addition, when performing fluidization treatment, the mixing ratio of the earth and sand, water and the solidifying agent has a great effect on the quality of the fluidized treatment soil to be produced. When entering the tank, an error occurs in the mixing ratio by the weight of the solid.

[0007] From the above, when pouring excavated soil into the fluidization tank, it is necessary to remove as much solid matter as possible. To this end, it is conceivable to attach a sieving device to the fluidization tank to separate earth and sand from solids and the like. However, at least the detection of the amount of earth and sand charged into the fluidization treatment tank is performed by detecting an increase in the weight of the fluidization treatment tank, and the detection of the water injection amount and the addition amount of the solidifying agent are also performed in the fluidization treatment tank. Since the screening may be performed by detecting the weight, it is not preferable to vibrate the sieve to perform the sieving, for example, since this may hinder the weight measurement. Further, if the sieve is kept stationary, it may not be possible to smoothly and quickly separate the earth and sand from the solid matter.

[0008] In addition, when the sieving is performed, solids remain on the sieve. However, if the solids are left as they are, they not only hinder the subsequent sieving operation, but also due to the remaining solids. Due to the increase in the weight of the fluidization tank, the amount of earth and sand input is not accurately detected. This considerably complicates the operation, since every time solids are deposited on the sieve, they have to be removed. Therefore, even if the sieving apparatus is installed in the fluidization tank, the excavated soil must be temporarily placed to remove at least large-sized solids in advance.
In addition, the work of separating earth and sand and solid matter becomes extremely troublesome, for example, only a coarse mesh can be used to a certain extent, and there is a problem that solid matter and the like cannot always be surely separated. .

The present invention has been made in view of the above points, and an object of the present invention is to provide a simple structure and to ensure that solid matter and the like can be smoothly and reliably supplied to a fluidization tank when earth and sand are charged. Is to be able to be separated.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a fluidization tank for mixing and stirring earth and sand, water and a solidifying agent in a body frame of a self-propelled vehicle. A front turning frame is installed on the body frame, and at the front end of the arm connected to the boom, sediment is separated from solids and put into the fluidization tank. And a front working mechanism to which a sediment charging bucket provided with a sieving means is connected.

[0011] Here, the bucket for earth and sand is provided with left and right side plates in the same manner as a bucket for excavating ordinary earth and sand.
It is provided between these two side plates, it can be constituted by a bottom plate curved into a concave curved surface, in such a case, a mesh or a sieve portion comprising a plurality of slits is attached to the bottom plate. A rotating shaft may be provided between both side plates, and a plurality of rotating claws may be provided on the rotating shaft for scraping off the earth and sand from the sieve portion. Then, it is preferable that the rotating shaft to which the rotating claw is attached is rotationally driven by a hydraulic motor mounted on the side surface of the bucket. The sediment charging bucket may be configured to be detachably connected to the arm of the front working mechanism, and the arm is used to agitate the inside of the sediment excavating bucket or the fluidization tank in exchange for the sediment charging bucket. A configuration in which a stirring means can be attached can also be adopted.

[0012]

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 device. First, as shown in FIG. 1A, water W is supplied to the fluidization tank 1 in advance, and in this state, the generated soil G is fluidized as shown in FIG. Put into the processing tank 1. At the same time as the operation of charging the generated soil G is started, the operation of the stirring device 2 is started, and the water W and the generated soil G are stirred and mixed. In this way, by simultaneously performing the input of the generated soil G and the stirring by the stirring device 2, the water W and the generated soil G can be smoothly mixed. Thus, the generated soil G in the water W
By stirring the fluidization tank 1 with the stirring device 2 while adding the water, the generated soil G and the water W are uniformly mixed to form a slurry. After the water content of the generated soil G has been adjusted in this way, while the stirring by the stirrer 2 is continued, as shown in FIG. The solidifying agent C is uniformly mixed with the slurry S.

As a result, soil that is not suitable for backfilling, 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 C 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 device is installed in a traveling vehicle as shown in FIG. With this configuration, the soil generated by excavation can be taken in the work site, fluidized, and then directly backfilled at the excavation site. Here, as the vehicle, a crawler-type traveling vehicle equipped with crawler tracks is exemplified, but the traveling means does not necessarily have to be a crawler-type traveling vehicle. good.

First, referring to FIG.
Is provided with a crawler-type traveling body 11 having a pair of right and left crawler belts as self-propelled means, and a body frame 12 constituting a chassis. The crawler type traveling body 11 is provided with a driving sprocket 14 and an idler 15 at both ends of a pair of left and right traveling body frames 13, and a crawler track forming an infinite traveling track between the driving sprocket 14 and the idler 15. 16 are 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 17. As is apparent from FIGS. 3 and 4, a front working mechanism 18, a fluidization tank 19, and a solidifying hopper 20 are provided on the body frame 12.
The front working mechanism 19 has a boom 22 provided on the front turning frame 21 provided on the body frame 12 so as to be capable of raising and lowering, and an arm 23 connected to the tip of the boom 22 so as to be rotatable in the vertical direction. A front attachment is connected to the tip of 23. In order to allow the front attachment to be easily attached to and detached from the arm 23, a connecting member 25 is connected to the tip of the arm 23 via a connecting pin 24, and the link member 2 is connected to the connecting member 25.
7 are connected using connecting pins 28. Thereby, the connecting member 25 is rotatable around the connecting pin 24 which is a connecting portion with the arm 23.

FIG. 5 shows the structure of the connecting member 26. As shown in FIG. As is clear from FIG. 5, the connecting member 26 has a main body 29 composed of a pair of left and right plates 29a, 29a, and the connecting pin 24 of the arm 23 and the connecting pin of the link mechanism 27 are respectively provided between the plates 29a, 29a. 28
Is pivoted. A fixed hook 30 is integrally provided on the main body 29, and a movable hook 31 is provided on the connecting pin 28. The fixed-side and movable-side hooks 30 and 31 are open in opposite directions to each other. The movable-side hook 31 is opposite to the opening side, that is, the back side faces the fixed-side hook 30. The hook 31 is configured to be displaced in a direction approaching or moving away from the fixed hook 30 side. For this purpose, a piston-cylinder 32 is provided between the movable-side hook 31 and the fixed-side hook 30. By supplying pressure oil into the cylinder of the piston-cylinder 32, the movable-side hook 31 Pin 28
And is separated from the fixed side hook 30. Further, between the movable hook 31 and the fixed hook 30, a tension spring 33 for urging the movable hook 31 in a direction approaching the fixed hook 30 is provided. When connected to the tank, the action of the spring 33 causes the movable hook 31 to be displaced in a direction approaching the fixed hook 30.

As described above, the fluidization processing apparatus 10
Is to continuously excavate, fluidize and backfill earth and sand at the work site. First, excavation of earth and sand can be separately performed by using a hydraulic excavator. However, the fluidizing apparatus 10 is provided with a front working mechanism 18, and a front attachment is easily attached to the arm 23 constituting the front working mechanism 18. Since the detachable connecting member 25 is provided, by attaching a digging bucket to the connecting member 25, excavation of earth and sand can be performed efficiently.
Regardless of whether a hydraulic excavator is used or a drilling bucket is mounted as a front attachment, the excavated soil may contain solids and the like. not,
After removing solid matter from the excavated soil in advance, it is put into the fluidization tank 19. For this purpose, the earth and sand charging bucket 40 shown in FIGS. 6 and 7 is used.

In these figures, 41 and 42 are left and right side plates, and 43 is a bottom plate. The bottom plate 43 is curved in a concave curved surface shape, and both ends of the bottom plate 43 are fixedly provided on the side plates 41 and 42, thereby forming a storage portion for earth and sand having a predetermined volume. A substantially central portion of the bottom plate 43 has a large opening, and a sieve portion 44 made of a mesh in which metal reinforcing bars are arranged vertically and horizontally is mounted in this opening. Due to its function, a reinforcing material that has a high strength that does not deform at all even when the required earth and sand are stored in the bucket 40 is used as the reinforcing member constituting the sieve portion 44. The sieve section 44 is for separating earth and sand contained in the bucket 40 from solids such as rocks contained in the earth and sand. Accordingly, the sieve portion 44 has a mesh size necessary for allowing substantially only earth and sand to pass through, while foreign matters such as solids not contributing to the fluidization treatment are left.

In order to allow earth and sand to pass through the sieve portion 44 more quickly and reliably, a rotating shaft 4 is provided between the left and right side plates 41 and 42.
5 is rotatably supported, and the rotary shaft 45 is provided with a scraping claw 46 connected thereto. A plurality of the scraping claws 46 extend in a direction orthogonal to the rotation axis while being different in the rotation direction and the axial direction. And
The rotating shaft 45 extends through one of the side plates 41, and a driven gear 47 is connected to an end thereof. A hydraulic motor 48 is mounted on the outer surface of the bottom plate 43, and a drive gear 49 is mounted on the output shaft of the hydraulic motor 48. A chain 50 is wound and provided between the driving gear 49 and the driven gear 47, and a power transmission mechanism for the rotating shaft 45 is configured from the driving gear 49, the chain 50, and the driven gear 47. The mounting portion of the transmission mechanism is covered with a cover 51 fixed to the side plate 41. Further, the hydraulic motor 48 is provided with a pair of pipe connections (not shown), one of which is connected to a pipe from a hydraulic pump, and the other of which is connected to a hydraulic oil tank. Pipes are connected respectively.

Therefore, when the hydraulic motor 48 is operated, the drive gear 49 rotates. This rotation is transmitted to the driven gear 47 via the chain 50, and the rotation shaft 45 is driven to rotate. The rotating shaft 45 has a scraping claw 46.
Is attached, the earth and sand in the bucket 40 is agitated by the scraping claws 46. As a result, the earth and sand falls through the sieve part 44 and is separated from the solid matter.

Two connecting plates 52, 52 are erected at the base end on the outer surface side of the bottom plate 43, and these connecting plates 52, 52 are erected.
A pair of connecting pins 53 and 54 are mounted between the two. As a result, it becomes a connecting portion on the side of the earth and sand input bucket 40 and can be detachably connected to the connecting member 25 provided at the tip of the arm 23 constituting the front working mechanism 18. This connection is made by the fixed side hook 30 of the connecting member 25.
To the connecting pin 53, and the operating side hook 31 to the connecting pin 5
4 is performed. Further, the bottom plate 43
Is provided with a plurality of excavating claws 55 at its tip.

As described above, the sieve part 44 and the scraper 4
6 can be easily attached to and detached from the connecting member 25 of the arm 23, and the connecting member 25 does not have a sieve portion or a scraping claw. Can also be linked. FIG. 2 shows a digging bucket 60 mounted as a front attachment. The digging bucket 60 has left and right side plates and a bottom plate, and a plurality of digging claws project from the tip of the bottom plate. It is composed of those that have been set up. The excavating bucket 60 is also provided with a connecting portion, and the excavating bucket 60 is connected to the arm 23 as a front attachment in place of the earth and sand charging bucket 40, so that the fluidization processing device can be used to perform operations such as digging a gutter. Can be performed smoothly and efficiently.

Next, the fluidization tank 19 and the solidifying agent hopper 20 are arranged on the vehicle body frame 12 so as to be arranged right and left behind a front turning frame 21 provided with a front working mechanism 18. The fluidization processing tank 19 is a tank having an open upper end. The fluidization processing tank 19 is installed on the vehicle body frame 12 via a vibration-proof support member 34, and is disposed between the fluidization processing tank 19 and the vehicle body frame 12. Is provided with a load sensor 35 composed of a load cell or the like as a weight measuring means. Accordingly, when earth and sand, water, and a solidifying agent are supplied into the fluidization tank 19, the supply amount can be detected by the load sensor 35. The disposition position of the fluidization tank 19 is a position where the front attachment of the front working mechanism 18 reaches when the front turning frame 21 is turned. Accordingly, by mounting the earth and sand charging bucket 40 as a front attachment of the front working mechanism 18, earth and sand can be injected into the fluidization processing tank 19.

The fluidization tank 19 is supplied with sediment from the sediment charging bucket 40 in a state of being separated from solid matter, and water is supplied into the fluidization tank 19. Become. Since the upper end of the fluidization tank 19 is almost completely open, water can be supplied by inserting a water supply hose or the like from the upper end opening of the fluidization tank 19. The other end of the water supply hose or the like can be connected to a water tap or supplied from a water supply tanker, or can be pumped from a reservoir or the like.

The solidifying agent is supplied from a solidifying agent hopper 20. Fluidized soil generated by uniformly mixing the soil, water, and solidifying agent is discharged from the fluidization tank 19 and backfilled. For this reason, a pipe is placed at a position near the bottom of the fluidization tank 19. Discharge unit 3 with connection and on-off valve
6 is provided, and by connecting a hose or the like to the discharge portion 36, the fluidized soil generated in the fluidization tank 19 can be backfilled at the excavation point.

Here, the solidifying agent hopper 20 for juxtaposing the fluidizing tank 19 for supplying the solidifying agent is constituted by a closed container, and the solidifying agent is supplied from the solidifying agent hopper 20 to the fluidizing tank 19. It is being supplied. The solidifying agent hopper 20 is provided with a solidifying agent feeder 37 for supplying the solidifying agent. The solidifying agent feeder 37 is formed by mounting a screw 37b in a cylindrical body 37a, and is capable of sending out the solidifying agent in a predetermined direction by rotating the screw 37b with a hydraulic motor 37c. This solidifying agent feeder 3
Numeral 7 is provided in two sets, a vertical one which is opened near the bottom surface of the solidifying agent hopper 20 and extends upward, and a vertical one which is connected to the upper end thereof and extends horizontally in the horizontal direction toward the fluidization treatment tank 19. By operating these, the solidifying agent can be supplied to the fluidization treatment tank 19, and the amount of the solidifying agent can be controlled by the operating time of the solidifying agent feeder 37.

By the way, the fluidization tank 19 needs to be provided with a stirring means in order to mix the injected earth and sand and water, and to add a solidifying agent to the mixture and uniformly mix all of them. is there. The stirring means can be fixedly provided in the fluidization processing tank 19, or the stirring means may be attached to a support member provided on the vehicle body frame 12, and the stirring means may be arranged so as to be inserted into the processing tank 19. it can. However, the stirring means is used in the fluidization tank 19.
, The weight of the fluidization processing tank 19 increases accordingly, and when the stirring operation is performed, the fluidization processing tank 19 vibrates greatly.
There is an inconvenience such as shortening of the life of No. 5. In the case where the stirring means is provided so as to be supported by the body frame 12, the stirring means and the supporting member cover the upper part of the fluidization tank 19, which hinders the work of charging earth and sand. May come.

As described above, the stirring means is also used as a front attachment of the front working mechanism 18 in the arm 23.
Is configured to be detachably connected to the connection member 25 in the above. FIG. 8 shows the structure of the stirring means. As is clear from this figure, the stirring means 70 is formed by radially connecting a plurality of (four in the drawing) stirring blades 72 to the tip of a rotating shaft 71, and has a base end of the rotating shaft 71. A hydraulic motor 73 is connected, and the rotary shaft 71 can be rotationally driven by the hydraulic motor 73. Further, the hydraulic motor 73 is provided with piping connection portions 74a and 74b to which two pipings connected to a hydraulic pump and a hydraulic oil tank as a hydraulic pressure source are detachably connected. The stirring means 70 is also detachably connected to the connecting member 25 connected to the arm 23 constituting the front working mechanism 18 as a front attachment, so that the hydraulic motor 73 has a pair of plates 75, 75,
In the meantime, there are provided connecting pins 76 and 77 that engage with the hooks 30 and 31 on the fixed side and the movable side of the connecting member 25.

The fluidization processing apparatus 10 according to the present embodiment
Is constructed as described above, and is used, for example, for digging a gutter on a road, arranging a sewer pipe in the gutter, and burying the sewer pipe. In performing the fluidization process, a digging bucket 60 is used as a front attachment constituting the front working mechanism 18.
And the sediment charging bucket 40 and the stirring means 70 are used. When the work is not performed, one of the front attachments, for example, the excavating bucket 60 is connected to the arm 23. Even if it is held, other front attachments, that is, the bucket 40 for charging earth and sand and the stirring means 70 are connected to the body frame 12.
Preferably, it can be placed on Therefore, the body frame 12
A bucket mounting section 80 for stably holding the earth and sand input bucket 40 (the excavating bucket 60 can also be mounted) and a stirring means mounting section 81 for stably holding the stirring means 70 are provided. . An operator rides on the fluidization processing apparatus 10 to perform an operation. The operator sits on a driver seat 82 provided on the front turning frame 21 and performs operation using an operation lever, an operation pedal, or the like provided therearound. A display panel (not shown) is provided near the driver's seat 82 to display various data.

The work is performed by first excavating earth and sand, then generating fluidized soil in the fluidization tank 19, and burying the fluidized soil at the excavation site. Therefore, in the fluidization treatment device 10, excavation of earth and sand is performed first, and therefore, the excavating bucket 60 is
Is provided by being connected to the connecting member 25. Then, the front working mechanism 18 is operated to excavate a required portion. This excavation work is performed by the boom 22 constituting the front working mechanism 18.
And the arm 23 and the digging bucket 60 are each driven by a hydraulic cylinder. The turning is further performed by operating the turning device 17 to turn the vehicle body frame 12 and the front turning frame 21. . Then, the excavated soil is temporarily placed at a predetermined position.

When the excavated soil reaches a predetermined amount, the excavation work is stopped and the fluidization process is started. This fluidization treatment is performed by supplying water and earth and sand to the fluidization treatment tank 19. Either water or earth and sand may be supplied first, but if water is supplied in advance, the mixing of water and earth and sand will be performed more efficiently. Here, after the excavation work is stopped, the bucket 60 for excavation is removed as a front attachment, replaced with the bucket 60, and the bucket 40 for charging earth and sand is mounted. Water is supplied into the fluidization tank 19 while the front attachment is being replaced. This water supply amount can be detected as an increase in the weight of the fluidization processing tank 19 by the load sensor 35 provided in the fluidization processing tank 19, so that when a predetermined amount of water is supplied, the water supply is stopped.

As shown in FIGS. 9 and 10, when the bucket 40 for charging earth and sand is mounted, the piston-cylinder 32 of the connecting member 25 is operated, and the movable hook 31 is moved by the action of the spring 33 to the fixed hook 30. The fixed side hook 30 is displaced in a direction approaching the
0 is engaged with the connecting pin 53 connected between the connecting plates 52, 52, and then the connecting member 25 is pushed out by the link mechanism 27 and the piston-cylinder 32 is extended.
The movable side hook 31 is engaged with the connecting pin 54. Thereby, the bucket 40 for charging earth and sand is attached to the arm 23 very easily and quickly. Then, by connecting the two pipes to the hydraulic motor 48, the hydraulic motor 48 becomes operable.

The temporarily placed excavated soil is transferred to a bucket 4 for charging earth and sand.
It is scooped with 0 and put into the fluidization tank 19,
Front working mechanism 18 having a sediment charging bucket 40
Is provided on the front turning frame 21, and the front turning frame 21 can be turned with respect to the body frame 12 in which the fluidization tank 19 is installed. When the front swivel frame 21 is swung in the state of being turned, the bucket 40 for charging earth and sand is displaced to the upper position of the fluidization processing tank 19. In this state, when the hydraulic motor 48 is operated, the rotating shaft 45 rotates, and the scraping claw 46 rotates around the rotating shaft 45. Therefore, the contents of the bucket 40 are agitated, and the sediment is removed from the sieve portion 44. , And is supplied into the fluidization tank 19, and solids and the like remain on the sieve section 44. In addition, the agglomerated material can be broken down by this stirring, and the earth and sand in the bucket 40 is almost completely scraped off, and is put into the fluidization tank 19.

Here, the earth and sand can be charged at a position above the liquid level of the fluidization tank 19, but with the bucket 40 being displaced below the liquid level of the fluidization tank 19. You can also. Scratching nail 46 in liquid
When the is rotated, not only the bucket 40 for earth and sand input,
Since the agitating action inside the fluidization tank 19 is exhibited, the earth and sand and the water are preliminarily mixed, and the mud is smoothly and quickly decomposed. When the bucket 40 is lifted from the fluidization tank 19, almost only solid matter remains in the bucket 40, so that the separation of earth and sand can be performed more completely. The solid matter remaining in the bucket 40 can be easily discarded by operating the front working mechanism 18. When the charging of the earth and sand is repeated a predetermined number of times, a predetermined amount of the earth and sand has been charged into the fluidization tank 19. The input amount of the earth and sand can be detected by the load sensor 35 provided in the fluidization tank 19.

Here, since the mixing ratio between the earth and sand and the water greatly affects the quality of the fluidized soil as a product, it is extremely important to accurately control the mixing ratio. If the mixing ratio is not precisely controlled, the degree of solidification will decrease,
In addition, the solidification may be excessive, and in particular, if the water content is excessive, there is a risk of land subsidence. Since the excavated soil itself contains moisture, it is preferable to determine the mixing ratio in consideration of this moisture. For this purpose, the optimum mixing ratio may be confirmed by experiments or the like before the actual fluidization process is started. In order to mix the important soil and water with an accurate ratio in this manner, at least the supply amounts of the water and the earth and sand can be detected by the load sensor 35. Moreover,
The fluidization tank 19 is simply a container, is extremely lightweight, and is not provided with any special driving means. Therefore, for example, the load sensor 35 having a simple configuration such as a load cell is used to supply the water supply amount and the sediment. The input amount can be detected very accurately, and the occurrence of a measurement error can be suppressed.

In particular, since only the sediment can be supplied into the fluidization tank 19 after being separated from the solid matter through the sieve portion 44 of the sediment charging bucket 40, the weight of the measured sediment may vary. Is reliably prevented from occurring, and the earth and sand is measured very accurately. As a result, the fluidized soil as a product has high quality.

When the charging of the earth and sand into the fluidization tank 19 performed as described above is completed, the front attachment is replaced. The replacement of the front attachment is performed in the same manner as described above, and the stirring member 70 is connected to the connecting member 25 connected to the arm 23. Then, by connecting a hydraulic pump and a pipe from a hydraulic oil tank to the hydraulic motor 73 of the stirring means 70, the stirring blade 72 can be driven to rotate. Then, by rotating the front rotating frame 21 and driving the front working mechanism 18, the stirring means 70 is inserted into the fluidization tank 19, and the hydraulic motor 73 is operated to rotate the stirring blades 72. Then, the earth and sand and the water are completely mixed. In particular, when the earth and sand input bucket 40 is set to be below the liquid level of the fluidization treatment tank 19, the earth and sand are already mixed at the stage where the earth and sand are input, and a certain degree of muddy state is obtained. In addition, since the solid matter is completely removed from the earth and sand, the operation of the stirring blade 72 is extremely smoothly performed, and the earth and sand and the water are quickly and reliably mixed. Then, the stirring means 70 is not fixedly held, but by moving the front working mechanism 18 in an appropriate direction, the entire inside of the fluidization processing tank 19 can be made uniform even with a small stirring means. Can be stirred.

While continuing the stirring, the solidifying agent hopper 2
Activating the solidifying agent feeder 37 provided at zero will automatically add the solidifying agent. Therefore,
At a fixed ratio of earth and sand, water and solidifying agent, a completely mixed good-quality fluidized soil is produced. Here, the mixing ratio of the solidifying agent can be detected by increasing the weight of the fluidization tank 19, and can also be detected by the operating time of the solidifying agent feeder 37.

When the fluidized soil is generated, the discharge unit 36
By connecting a discharge hose or the like to the discharge port and opening the on-off valve provided in the discharge section 36, the fluidized soil can be backfilled at the excavation site. Then, after backfilling the fluidized soil, although there is a time lag depending on the mixing ratio of water and the solidifying agent, the weather, etc., the fluidized soil is solidified in about one hour to one day. Become. Therefore, after sufficient solidification, the road can be restored by paving on it or the like.
Moreover, since the soil that has been improved by fluidization treatment is backfilled, there is no danger of sneaking around the sewer pipe and creating voids and the like. There is no fear. By appropriately adjusting the mixing ratio of the solidifying agent, if excavation is necessary again, excavation can be performed with a hydraulic shovel or the like.

[0041]

As described above, according to the present invention, the front turning frame is installed on the vehicle body frame, and at the tip of the arm connected to the boom, sediment is separated from the solid matter and put into the fluidization tank. And a front working mechanism connected to a sediment charging bucket with sieving means for the front turning frame, so that the simple structure allows smooth and reliable feeding of sediment to the fluidization tank. This has the effect that solids can be separated.

[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 FIG. 2;

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

FIG. 5 is an explanatory diagram of a configuration of a connecting member.

FIG. 6 is a plan view of a bucket for charging earth and sand.

FIG. 7 is a right side view of the bucket for charging earth and sand.

FIG. 8 is an external view of a stirring means.

FIG. 9 is an operation explanatory diagram when a front attachment is connected to an arm constituting the front working mechanism.

FIG. 10 is a view showing a state in which a connecting portion of a front attachment is connected to a connecting member of an arm.

[Explanation of symbols]

REFERENCE SIGNS LIST 10 fluidization processing device 11 crawler traveling body 12 body frame 18 front working mechanism main body 19 fluidization processing tank 20 solidifying agent hopper 21 front turning frame 22 boom 23 arm 25 connecting member 30 fixed hook 31 movable hook 35 load sensor 40 Bucket for earth and sand loading 41, 42 Side plate 43 Bottom plate 44 Sieve part 45 Scratching claw 48 Hydraulic motor 50 Chain 52 Connecting plate 53, 54
Connecting pin 60 excavating bucket 70 stirring means 72 stirring blade

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsushiro Miura 2-6-2 Otemachi, Chiyoda-ku, Tokyo Within Nikko Construction Machinery Co., Ltd. Construction Machinery Co., Ltd.

Claims (5)

[Claims] 1. A self-propelled vehicle in which a fluidization tank for mixing and stirring earth and sand, water and a solidifying agent is installed on a body frame of a self-propelled vehicle, wherein a front turning frame is installed on the body frame. A front working mechanism in which a front and rear end of an arm connected to the boom is connected to a sediment charging bucket provided with a sieving means for separating sediment from solids and charging the sediment into the fluidization tank. A fluidization treatment device, characterized in that it is configured to be mounted. 2. The bucket according to claim 1, wherein said bucket is provided with left and right side plates and a bottom plate provided between said two side plates. A sieve portion is provided on said bottom plate, and a rotating shaft is provided between both side plates. The fluidization treatment apparatus according to claim 1, wherein a plurality of rotating claws are provided on the rotating shaft for scraping off the earth and sand from the sieve portion. 3. The fluidizing apparatus according to claim 2, wherein the rotating shaft to which the rotating claw is attached is driven to rotate by a hydraulic motor mounted on a side surface of the bucket. 4. The fluidization processing apparatus according to claim 1, wherein the earth and sand charging bucket is detachably connected to an arm of the front working mechanism. 5. The arm is provided with a bucket for excavating earth or sand or a stirring means for stirring the inside of the fluidization tank in place of the bucket for charging earth and sand. 5. The fluidization treatment device according to 4.