JP2002263463A - Mixing processor for improving soil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve processing efficiency and processing quality even when conventional lap execution is omitted. SOLUTION: This mixing processor is provided with a rotary shaft 15, an agitation blade 16 and a supplier 20, and mixes a solidifying material b supplied from the supplier 20 and extra soft soil (a) in the process of lowering the rotary shaft 15 into the extra soft soil (a) and elevating it or the like. The supplier 20 is provided with a compressed air supply means 9 together with a solidifying material supply means 8. The rotary shaft 15 is freely rotatably supported on the inner side of a vertical type frame 3 and lowered or elevated together with the frame 3. The frame 3 is provided with: a mixing ejector 5 disposed on an appropriate position, connected through piping 30b and 31b or the like corresponding to the solidifying material supply means 8 and the compressed air supply means 9 and capable of jetting the solidifying material b sent from the solidifying material supply means 8 accompanying compressed air sent from the compressed air supply means 9; or a nozzle 18A connected to the mixing ejector 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixing treatment apparatus for improving soil by mixing a soft soil with a solidifying material, and more particularly to a mixing treatment apparatus in which soft soil is suitable for ultra-soft soil.

[0002]

2. Description of the Related Art As an improvement of earth and sand, for example, soft soil to be treated is an ultra-soft soil such as dredged soil, which may be collected at a treatment plant for improvement. FIG. 9 shows one such example described in Japanese Patent No. 3053179.
In this example, an extremely soft soil such as dredged soil is transferred to an area near landfill by an earth transport ship 1 and subjected to a mixing process before being used for landfill. The treatment method is as follows:
The mixing equipment 10 which is operated from the mixing equipment barge 4 using the earth transport ship 1 itself as a mixing tank.
To produce a mixture c having a predetermined quality. That is, the barge 4 includes the mixing device 10 and the supply device 20.
Is equipped. The mixing device 10 includes a crane device 11
Drives the mixing means 12. Crane device 11
Can be moved back and forth, left and right while the mixing means 12 is suspended from the revolving jib 13. Mixing means 12
Has a rotating shaft 15 that is rotated by a drive motor, a speed reducer, and the like, and a stirring blade 16 provided at the lower end of the rotating shaft 15. The rotating shaft 15 has a supply pipe and a discharge port (not shown) on the lower end of the pipe, and can discharge the solidified material b supplied through an upper swivel or the like from the discharge port. The supply device 20 determines the usage amount and flow value of the solidifying material b for improvement in accordance with the water content and the like of the earth and sand a to be treated, and for example, produces and supplies the solidifying material b in a predetermined slurry.

In the case of producing the mixture c, the solidified material b is supplied into the earthing ship 1 from a dedicated pipe, the above-mentioned swivel and the supply pipe in the shaft, and further from the above-mentioned discharge port by a grout pump or the like of the supply device 20. . The operator lowers and raises the rotating shaft 15 while moving the mixing means 12 with the crane device 11, moves the rotary shaft 15 back and forth, and sequentially moves left and right, mixes and mixes the earth and sand a and the solidified material b with the stirring blade 16, The whole is treated to give a uniform mixture c. Such a processing method is the same even when the method is performed in a landfill or a processing site provided near the landfill or the landfill area itself, instead of the land transport ship 1.

[0004]

The earth and sand improvement described above is a large-capacity treatment, and not only satisfies the quality of the mixture c, but also requires a rapid treatment because the physical properties change over time. For this reason, as the conventional mixing apparatus 10, the rotating shaft 15 may be a multiple type as shown in FIG.
The processing speed is improved by devising the ascending speed, the number of stages and the number of the stirring blades 16, and the like. However, in the conventional structure, as shown in the example of the double type in FIG. 10, the improvement range corresponds to the rotation locus of the stirring blade 16, and the portion e1 of (a) outside the locus is the unimproved portion. Becomes Therefore, as a processing method, the stirring blade 16 has to be wrapped around the unimproved portion e1 at the time of the next treatment as in (b) to operate the unimproved portion as little as possible. This lapping countermeasure is how to set the value of the lapping margin D with respect to the full length L of the stirring blade 16, and the larger the lapping margin D, the lower the processing efficiency and the higher the manufacturing cost. In terms of processing quality, besides setting the lap margin D, for example, if the side wall of the processing plant is inclined as shown in the present invention in FIG. Becomes a factor of quality deterioration.

An object of the present invention is to solve all of the above problems. Specifically, the relatively simple structure enables mixing to be performed outside of the rotation range of the stirring blade, thereby omitting the conventional lapping work, and at the same time, the stirring capability of the stirring blade and the power of the discharge pump. It is an object of the present invention to provide a mixing device for improving soil and sand that can improve the processing efficiency and the processing quality without depending only on the mixing device.

[0006]

In order to achieve the above object, the present invention provides a rotating shaft 15, a stirring blade 16 which is rotated integrally with the rotating shaft as shown in the drawings, and an ultra-soft object to be treated. A supply device 20 that supplies the solidified material b to the soil a, and supplies the solidified material b to the ultra-soft soil a during the process of lowering or rising the rotary shaft 15 into the ultra-soft soil a. In the mixing processing apparatus for mixing by feeding,
Has a compressed air supply means 9 together with a solidified material supply means 8, and the rotary shaft 15 is provided with a vertical frame 3 having a substantially rectangular cross section.
Is rotatably supported inside and is lowered and raised together with the frame 3. The frame 3 is provided at an appropriate position, and the pipes 30b and 31b corresponding to the solidified material supply means 8 and the compressed air supply means 9 are connected. The solidified material b sent from the solidified material supply means 8 is connected to the compressed air supply means 9
And a nozzle 18A connected to the mixing ejector 5 which can be ejected in association with the compressed air sent from the mixer.

According to the present invention described above, the structure of the frame 3 for supporting the rotating shaft 15 inside and the mixing ejector 5 fixed to the frame 3 allows the outside of the stirring trajectory of the stirring blade 16, that is, once the stirring blade 16 is used. The non-improved part which cannot be processed by the vertical movement of the can be improved by the mixing ejector 5. That is, the mixing ejector 5 ejects the solidified material b into the ultra-soft soil a at a high speed while accompanying the compressed air with the compressed air. Structurally, Japanese Patent Application Laid-Open
As described in Japanese Patent Application No. 0-196709, instead of the conventional method of discharging the solidified material b from the lower end side (nozzle) of the supply pipe by the transfer capability of the pump (hereinafter referred to as a single discharge mode), the solidified material b This method utilizes a method in which b is entrained by compressed air and discharged to ultra-soft soil (hereinafter, this is referred to as an air entrainment mode). The advantage is that the discharge force can be increased because the solidified material b is put in the compressed air and jetted in a mist state, and at the same time, the solidified material b collides with the ultra-soft soil a at high speed, so that the soil fluidization and subdivision, that is, mixing and stirring, It is excellent in action. Therefore, in the structure of the present invention, the rotating shaft 15 is operated up and down in a more stable state by being supported by the vertical frame 3, and the mixing and ejecting action is performed at a position other than the object to be treated by the stirring blade 16. 5 enables processing. As a result, the present invention can maintain the quality and greatly improve the processing efficiency without taking the conventional lapping measures.

[0008] In the present invention, the very soft soil is such that the rotating shaft and the frame can be lowered by their own weight. "Soil" includes excavated soil such as earth and sand obtained by dredging, sludge, excavated soil generated during reclamation and earthworks, construction residual soil, and mountain soil. The solidifying material is not limited to the powder itself as long as it is a powder type such as cement or quicklime, and includes a material processed into a fluid such as cement milk. Any material can be used as long as it can be ejected along with the compressed air.

The present invention described above is more preferably embodied as in claims 2 to 5. That is, first, the mixing ejector 5 includes a solidifying material supply unit 17a for introducing the solidifying material b from the first inlet 17c, and a second
An air supply unit 17b introduced from an inlet 17d of the nozzle and a nozzle unit 1 for ejecting the solidified material b with compressed air
8 is provided. This is a specific example of the embodiment shown in FIG. 3, and since the nozzle portion 18 is integrated, the nozzle portion 18 is excellent in handleability, mountability to the frame 3 side, and the like. Second, the mixing ejector 5 includes the solidifying material b
Supply unit 17a for introducing the compressed air from the first inlet, and an air supply unit 17 for introducing the compressed air from the second inlet.
b, and causing the solidified material b to accompany the compressed air,
In this configuration, the fuel is ejected through the corresponding nozzle 18A fixed to the frame 3. This specifies the configuration of FIG. 5 and FIG. 6, for example, the mixing ejector 5B
The arrangement of (5) can be provided at an appropriate upper and lower position or on the upper side of the frame 3, and the nozzle 18A can be attached to the lower side of the frame, so that the mounting portion and the arrangement restriction can be relaxed. Third, the nozzle portion 18 or the nozzle 18A of the mixing ejector 5 is arranged at least at a corner on the bottom side of the frame 3 with the ejection port 18a facing inward. This ensures that the unimproved portion e1, which cannot be processed by a single vertical movement of the stirring blade 16 as shown in FIG. 10, is reliably processed by the above-described air entrainment mode as shown in FIG. . Fourth, the nozzle unit 1 of the mixing ejector 5
The nozzle 8 or the nozzle 18A is arranged so that the ejection port 18a faces the outside of the frame 3. This allows the unimproved region e2, which cannot be processed by the lowering and raising operations of the stirring blade 16 as shown in FIG. 8, to be processed in the above-described air entrainment mode so that the processing quality can be improved without lowering the production efficiency.

The above-mentioned mixing ejector or nozzle can be used, for example, by stopping the supply of the solidified material and injecting only the compressed air into the ultra-soft soil, or stopping the compressed air to remove the solidified material. It is also possible to discharge to super soft soil by the supply pressure. In addition, the used compressed air may be provided with an exhaust pipe along the vertical direction of the frame, for example, and may be exhausted and collected on the ground or on the sea through the exhaust pipe. In this regard, the technique described in JP-A-2000-196709 is appropriately modified and applied.

[0011]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a configuration diagram schematically showing a basic embodiment of the present invention. FIG. 2 shows FIG.
FIGS. 3A and 3B are schematic structural views when viewed from the direction of the line AA of FIG. 3A, and FIGS. 3A and 3B show an example of a mixing ejector, wherein FIG. 3A is a schematic external view, and FIG. 3B is a schematic configuration diagram. FIGS. 4A and 4B are two examples showing the configuration on the lower end side of the rotating shaft. FIG. 5 is a diagram showing an example in which the mixing ejector of FIG. 6 is applied to the vertical frame side. FIG. 7 is a diagram showing an improvement effect when the present invention is applied. FIG. 8 is a schematic diagram showing another arrangement example of the mixing ejector. Note that the same reference numerals are used for members similar to those in the related art.

(Overall Overview) As described above, this mixed treatment apparatus uses the soil carrier 1 itself as a treatment plant or improves a large amount of ultra-soft soil at a treatment plant provided on the ground. When the main part of the apparatus corresponds to FIG.
Is configured as a processing unit 2 having a vertical frame 3 and a mixing ejector 5A (or a mixing ejector 5B and a nozzle 18A) as well as a rotating shaft 15 with a stirring blade 16 as shown in FIG. The point that the solidification material supply means 8 for producing and supplying the solidification material b and the compressed air supply means 9 for generating and supplying the compressed air are configured as a set is changed. In the following description, the operating features will be mentioned after clarifying the details of the changes.

(Processing Unit) The processing unit 2 is shown in FIG.
As shown in FIG. 2 and FIG. 2, a rotating shaft 15 is rotatably supported on a vertical frame 3 having a frame shape having a substantially rectangular cross section, and a mixing ejector 5 is attached to the frame 3 and a stirring blade 16. It is a thing. The processing unit 2 is suspended from the gantry 6 via the frame 3 in the same manner as the mixing unit 12 in FIG. On the gantry 6, a rotary drive mechanism 7 </ b> A and upper swivels 7 </ b> B are provided according to the number of the processing units 2. Rotary drive mechanism 7A
Comprises a deceleration mechanism, a motor, and the like, and rotates the rotating shaft 15 forward and backward. The upper swivel 7B enables the solidified material b and compressed air supplied from the supply device 20 to be introduced into the supply pipes 30a and 31a arranged in the rotary shaft 15. In the drawings, the supply pipes 30a and 31a of the upper swivel 7B and the supply pipes 30a and 31a in the axis of the rotating shaft 15 described later are denoted by the same reference numerals. This is to make the solidified material path and the compressed air path easy to understand, but actually has a structure in which dedicated pipes are connected to each other.

Here, the vertical frame 3 is assembled in a rectangular solid by the vertical aggregates 3a and the horizontal aggregates 3b, and the overall rigidity is ensured by a large number of reinforcing members 3c. The size is determined according to the number of the rotating shafts 15 to be used, and corresponds to the rotating locus of the stirring blade 16 when the rotating shaft 15 is disposed at the center, and the rotating locus drawn by the stirring blade 16 as shown in FIG. Are designed not to protrude out of the frame 3.
The above-mentioned frame 3 is manufactured as a dedicated product corresponding to the number of the rotating shafts 15 as shown in FIG. 2A, or as a single unit as shown in FIG. The number of the unit frames 3A corresponding to the number of the rotating shafts 15 is sequentially connected to each other using the unit frames 3A corresponding to the rotating shafts 15 of the above. In the latter case, the number of rotating shafts 15 to be used must be connected, but versatility can be obtained.

The rotary shaft 15 has a cylindrical shape with a bottom, and has supply pipes 30a and 31a arranged along the vertical direction inside the shaft.
And a mixing ejector 5 provided on the rotating shaft 15 or the stirring blade 16. The frame 3 is rotatably supported by a guide member 3d. The guide member 3d has, for example, a configuration in which both ends are fixed to appropriate positions of the frame 3, and a guide hole provided in an intermediate portion supports the rotation shaft 15 around its axis. The number of stages and the number of the stirring blades 16 are arbitrary. As the stirring mechanism, for example, a well-known co-rotation prevention plate or the like is provided as necessary.

The mixing ejector 5 may have any of the structures shown in FIGS. In this embodiment, FIG. 3 is attached to the vertical frame 3 side, and FIG. 4 is an example attached to the rotating shaft 15 side. In this embodiment, the mixing ejector 5 is attached to the rotating shaft 15 and the stirring blade 16. However, the rotating shaft 15
The same discharge ports and nozzles as those in the related art, that is, the above-described single discharge mode may be applied to the stirring blade 16.

The mixing ejector 5A (5) shown in FIG. 3 includes an introduction cylinder 17 which is a steel housing, a nozzle 18,
And an attachment portion 19. In the introduction cylinder portion 17, an air supply portion 17b on the rear side of the cylinder and a solidified material supply portion 17a on the front side of the cylinder are partitioned by the valve mechanism 14, and each supply portion 17a, 17b
Are provided with inlets 17c and 17d. Valve mechanism 14
Is fixed to the inner circumference of the introduction cylinder 17 and the air supply unit 1
The valve case 14a has a valve case 14a through which compressed air introduced into the valve 7b can be introduced (forming a valve seat), and a valve member 14b that opens and closes the inside of the valve case 14a and the solidified material supply unit 17a. I have. A solidified material side pipe 30b piped along the frame 3 is provided at the inlet 17c, and an air side pipe 31 piped along the frame 3 is provided at the inlet 17d.
b is connected directly or via a joint.
The valve member 14b is normally closed by a spring member 14c to shut off between the two supply portions 17a and 17b, and when the pressure in the air supply portion 17b (valve case 14a) reaches a predetermined pressure, the spring member 14c is closed. The compressed air is switched to the open state against the urging pressure and compressed air is supplied from the supply unit 17b to the supply unit 17a.
To the side. Thus, the solidified material b introduced into the supply unit 17a is carried by the compressed air introduced from the supply unit 17b and is led out to the nozzle unit 18 side. In addition, the nozzle part 18 is connected to the supply part 17a on the rear side, and has a width increasing from the rear side to the front side. That is,
The jet port 18a of the nozzle section 18 is a flat opening whose width is gradually increased from the supply section 17a side toward the tip. Further, the pipes 30b and 31b are schematically illustrated in drawing.

The mixing ejector 5B (5) of FIG. 4 is of a type in which the nozzle portion 18 is divided, and the same or similar parts as those of the mixing ejector 5A are denoted by the same reference numerals.
Outline the feature points. In this structure, a second inlet 17d for air introduction is provided at the upper end side of the introduction cylindrical portion 17, and a pipe portion 17c connected to the first inlet is provided at the other end side, and the lower end side is slightly narrowed. The pipe portion 17c is connected to the introduction cylinder 1
7, the insertion end side is disposed approximately in the center of the cylindrical shape, and is bent toward the lower end side. The second inlet 17d is connected to a supply pipe 31a provided along the inside of the rotary shaft 15 to introduce compressed air. The pipe 17c is connected to a supply pipe 30a that is piped along the axis, and introduces the solidified material b.
The introduced solidified material b is put on the compressed air introduced from the upper side, is connected to the lower end, and is led out to the nozzle 18A through the connection pipe 33. The nozzle 18A has a structure including the nozzle section 18 and the mounting section 19 except for the introduction cylinder section 17 in the mixing ejector 5A described above. Nozzle 1
The shape of 8A is almost the same as that described above. The mixing ejector 5B (5) in FIG. 5 is the same as that in FIG.
This is an example of applying the same structure to the frame 3 of the processing unit 2. In this case, the mixing ejector 5B is fixed at an appropriate position in the middle of the frame 3, and the divided nozzle 18A is fixed to the lower side of the frame 3. The mixing ejector 5B is arranged inside the frame 3 along the up-down direction. The installation location may be on the upper side of the frame 3. Further, the mixing ejector 5B and the nozzle 18A are connected by a connection pipe 33a longer than the connection pipe 33 as shown in FIG.

The above-described mixing ejector 5 includes a frame 3
Are fixed at appropriate positions by welding or other means. The attachment position is at least the frame portion corresponding to the corner at the bottom of the frame and the middle between the stirring blades 16 as shown in FIGS. 2 (a) and 2 (b). At the time of attachment, in the example of the corner portion, it is preferable that the ejection port 18a is opposed to the corresponding rotation shaft 15. As for the mounting position, as shown in the example of FIG.
May be installed facing the outside of the frame 3. In addition, as a mounting structure, a detachable hole such as a screw-in type is provided in a portion to be arranged such as a corner portion of the frame 3, and the detachable hole is usually closed with a blind plug, and the blind plug is removed when necessary. It is also conceivable to mount the mixing ejector 5. On the other hand, when it is attached to the rotating shaft 15, it is preferable that it is located between the stirring blades 16 as in the example of FIG.
When attached to the stirring blade 16, it is preferable to position the nozzle 18A and the jet port 18a of the nozzle portion 18 in the blade rotation direction as shown in FIG. However, these are arbitrarily set according to the processing conditions.

(Supply Apparatus) The supply apparatus 20 is composed of a solidified material supply means 8 and a compressed air supply means 9 as a set. Among these, the solidifying material supply means 8 mixes a silo 8A for the solidifying material such as cement, a solidifying material for improvement introduced from the silo 8A, and water introduced from a water tank (not shown) to a predetermined solidification. A manufacturing plant 8B for manufacturing a material slurry (hereinafter, this slurry is also abbreviated as the solidified material b), a low-pressure pump (such as a grout pump) 8C, a flow meter 8D, and the like are provided. The fluid (which may be the solidified powder b itself) produced in the production plant 8B is supplied through a low-pressure pump 8C and a flow meter 8D at a predetermined flow rate or the like to a pipe 30 such as a hose so as to satisfy a design addition amount. And supplied to the corresponding supply pipe 30a on the upper swivel 7B side and the corresponding pipe 30b on the frame 3 side. When the solidified material b is in a slurry state, it may be transferred from the manufacturing plant 8B to the agitator side and supplied from there. On the other hand, the compressed air supply means 9 includes a compressor 9A, a receiver tank 9B, an air flow meter 9C, and the like. Compressed air generated by driving the compressor 9A is supplied from the receiver tank 9B via the air flow meter 9C at a design pressure and flow rate through a pipe 31 such as a hose, and a corresponding supply pipe 31a on the upper swivel 7B side, It is supplied to the corresponding pipe 31b on the frame 3 side.

(Mixing Processing Operation) Next, the processing operation of the above-described mixing processing apparatus will be outlined. The processing procedure is such that the processing unit 2 is lowered and raised in the earth and sand a in the processing plant while being suspended by the crane device 11 as shown in FIG. Mixing of the solidified material b into the earth and sand a is performed in the process of lowering and / or drawing out the processing unit 2, and the entire earth and sand a is processed into the mixture c of a predetermined quality. That is, in the mixing process, in the supply device 20, the solidified material b (compounded powder, slurry, and the like) manufactured in the mixing plant 8B is pressure-fed to the pipe 30 via the pump 8C and the flow meter 8D, and is supplied via a valve and the like. The pressure is fed from the supply pipe 30a into the rotary shaft side mixing ejector 5 (solidified material supply unit 17a) and from the pipe 30b to the frame side mixed ejector 5 (solidified material supply unit 17a). At the same time, the compressed air generated by the compressor 9A is
The pressure is fed to the pipe 31 via the receiver tank 9B and the air flow meter 9C, and is supplied from the supply pipe 31a to the inside of the rotary shaft side mixing ejector 5 (air supply section 17) via a valve or the like.
b) and the pipe-side mixing ejector 5 from the pipe 31b, etc.
(Air supply unit 17b). Then, in each mixing ejector 5, as described above, the air supply unit 17b
Is at a predetermined pressure, the valve member 14b is switched to the open state against the urging force of the spring member 14c, and the compressed air is supplied to the supply unit 1.
7b is introduced into the supply unit 17a side, and supplied to the supply unit 17a.
The solidified material b introduced into the nozzle is put on the compressed air and is jetted toward the earth and sand a from the jet port 18a of the nozzle portion 18 or the nozzle 18A. In this ejection mode, the solidified material b (mixed powder, slurry, etc.) is ejected in a mist state accompanied by high-speed compressed air. In such an air-assisted discharge mode, by controlling the injection pressure of the compressed air and the supply amount of the fluid, the jets collide at high speed into the earth and sand a with the injection force as designed. Can be crushed, and the fluidity of soil and soil particles can be efficiently increased. For this reason, the following effects can be realized as the mixing apparatus of the embodiment.

(1) In this structure, not only the mixing and stirring action by the stirring blade 16 in the vertical frame 3 but also
As shown in FIG. 2, it is possible to add a function of subdividing and fluidizing the rotating shaft side mixing ejector 5 and the frame side mixing ejector 5, thereby improving the mixing processing efficiency. (2) As the mixing target area, the unimproved portion e1 as shown in FIG. 10 does not occur in the vertical frame 3 due to the fragmentation and fluidization of the frame side mixing ejector 5 as shown in FIG. For this reason, the mixing operation is performed in the vertical frame 3
, And does not require a conventional lap countermeasure. This means that the processing efficiency is improved and rapid processing is possible, and the larger the amount of the earth and sand a becomes, the more advantageous. Overall processing time is greatly reduced. Therefore, when used for landfilling, the mixture c can be used while maintaining the design quality without deteriorating the physical properties of the mixture c. (3) As shown in the example of FIG.
In the form in which a is directed to the outside of the frame 3, the mixing process can also be performed on the outside of the processing unit 2, so that the mixing process can be easily performed even in the mixing target area e 2, that is, the portion approaching the inclined wall, which was not possible or easy in the past. it can. Therefore, this structure also has an advantage that unimproved portions that cannot be processed by the stirring blade 16 can be processed without reducing the processing efficiency.

(Others) In addition to the above, the following modes are conceivable in relation to the method of using the above processing unit 2 or the conventional apparatus. First, the mixing ejector 5 is not provided on the rotating shaft 15 or the stirring blade 16, and the above-described conventional single discharge mode is adopted. In this case, only the processing operation by the mixing ejector 5 on the vertical frame 3 side is added to the conventional structure, but there is an advantage that the existing mechanism can be utilized. In addition, the processing operation by the mixing ejector 5 on the side of the vertical frame 3 is used without using the above-described single discharge mode and the air entrainment mode in the rotating shaft 15 and the stirring blade 16. This is adopted, for example, when the full size of the stirring blade 16 is short, and the solidified material b ejected from the frame side mixing ejector 5 is mixed and stirred by the stirring blade 16. Further, only the compressed air is ejected from the mixing ejector 5 on the side of the vertical frame 3 by utilizing the above-described single ejection mode and the air-assisted ejection mode on the rotating shaft 15 and the stirring blade 16. This is adopted, for example, when the processing unit 2 is reduced in size, and the frame side mixing ejector 5 removes the sediment a and the solidified material b ejected from the stirring blade 16 and the rotating shaft 15 side by the ejection pressure of the compressed air. Move it to remove the unmodified parts.

As described above, the present invention only needs to include the technical element specified in claim 1. The usage of the element and the like depends on the processing conditions, that is, the properties of the target earth and sand, the processing amount, the mode of the processing plant, and the improvement. It can be variously deformed or developed with reference to this form depending on the physical properties and properties of the solidifying material for use.

[0025]

As described above, in the mixing apparatus for improving soil and sand according to the present invention, the mixing ejector provided on the frame or the nozzle connected to the mixing ejector has one of the stirring blades.
Unimproved portions that cannot be processed by one vertical movement can be reliably improved. In other words, the present invention replaces the conventional countermeasures against lapping, and even in a position where the mixing and stirring action is not performed by the stirring blade, the mixing ejector can maintain the quality and process efficiently, thereby greatly improving the processing efficiency. it can.

[Brief description of the drawings]

FIG. 1 is a configuration diagram schematically showing a main part of a device form of the present invention.

FIG. 2 is a schematic configuration diagram viewed from a lower side of a frame in FIG. 1;

FIG. 3 is a configuration diagram of an example of a mixing ejector used in the present invention.

FIG. 4 is a configuration diagram of another example of a mixing ejector used in the present invention.

5 is a diagram in which the mixing ejector of FIG. 6 is applied to the frame side of FIG. 1;

FIG. 6 is a schematic configuration diagram showing the mixing ejector of FIG.

FIG. 7 is a schematic diagram showing an operation when the device of FIG. 1 is applied.

FIG. 8 is a schematic view showing another arrangement example of the mixing ejector.

FIG. 9 is a schematic diagram showing an example of a mixing process of a conventional mixing device.

FIG. 10 is a schematic diagram for explaining a problem of the conventional mixing apparatus.

[Explanation of symbols]

 1 is an earth moving ship (processing plant) 2 is a processing unit (apparatus main body) 3, 3A is a vertical frame 5, 5A, 5B is a mixing ejector 7A is a rotary drive mechanism 8 is a solidifying material supply means 9 is a compressed air supply means 15 Is a rotary shaft 16 is a stirring blade 18 is a nozzle portion 18A is a nozzle 20 is a supply device 30, 30a, 30b is a pipe or supply pipe for solidifying material 31, 31a, 31b is a pipe or supply pipe for compressed air a is earth and sand ( B) solidified material c: mixture

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E02F 7/00 E02F 7/00 FF Term (Reference) 2D040 AB07 AC05 CA01 CA03 CD07 EB04 4G036 AC04 AC05 4G078 AA01 AB20 BA05 BA09 CA12 DA01 DA19 DC06

Claims (5)

[Claims] A rotating shaft, a stirring blade which is rotated integrally with the rotating shaft, and a supply device for supplying a solidified material to the ultra-soft soil to be treated; In a process of supplying and mixing the solidified material to the ultra-soft soil in a process of descending or ascending, etc., the supply device has a compressed air supply unit together with a solidified material supply unit, and the rotating shaft is It is rotatably supported inside a vertical frame having a substantially rectangular frame shape in cross section, and is lowered and raised together with the frame. The frame is provided at an appropriate position and corresponds to the solidifying material supply means and the compressed air supply means. A mixing ejector capable of ejecting the solidified material sent from the solidified material supply means together with the compressed air sent from the compressed air supply means, or being connected to the mixed ejector. A mixing and treating apparatus for improving soil and sand, comprising: 2. The mixing ejector includes: a solidifying material supply unit for introducing the solidified material from a first inlet; an air supply unit for introducing the compressed air from a second inlet; The mixing and treating apparatus for improving soil and sand according to claim 1, further comprising a nozzle portion that is ejected with the nozzle. 3. The mixing ejector has a solidified material supply unit for introducing the solidified material from a first inlet, and an air supply unit for introducing the compressed air from a second inlet. 2. The mixing apparatus for improving soil and sand according to claim 1, wherein the mixture is ejected through the corresponding nozzle fixed to the frame together with the compressed air. 3. 4. The earth and sand according to claim 2, wherein the nozzle portion or the nozzle of the mixing ejector is disposed at least at a corner portion on the bottom side of the frame and the jet port is directed inward. Mixed processing equipment for improvement. 5. The mixing and processing apparatus for improving soil and sand according to claim 2, wherein the nozzle portion of the mixing ejector or the nozzle is disposed with an ejection port facing outside of a frame.