JP3702407B2 - In-situ mixed processing method and in-situ mixed processing equipment for contaminated soil at the bottom of the water - Google Patents

In-situ mixed processing method and in-situ mixed processing equipment for contaminated soil at the bottom of the water Download PDF

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JP3702407B2
JP3702407B2 JP2003091116A JP2003091116A JP3702407B2 JP 3702407 B2 JP3702407 B2 JP 3702407B2 JP 2003091116 A JP2003091116 A JP 2003091116A JP 2003091116 A JP2003091116 A JP 2003091116A JP 3702407 B2 JP3702407 B2 JP 3702407B2
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Prior art keywords
mixing
contaminated soil
casing
water
bottom
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JP2004298659A (en
Inventor
秀晃 中島
俊郎 原
常康 大西
啓一 安岡
寛 安積
哲郎 小寺
哲三 岩月
幸彦 徳永
勇三 櫻井
敏勝 畑島
薫 皿澤
Original Assignee
国土総合建設株式会社
東亜建設工業株式会社
東洋建設株式会社
株式会社北川鉄工所
株式会社竹中土木
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Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to bottom mud ground (hereinafter referred to as contaminated soil, etc.) that forms the bottom of harbors, rivers, lakes, etc. contaminated with dioxins, heavy metals such as lead and mercury, or polychlorinated bifinyl (usually abbreviated as pcb). In-situ mixing processing method that stirs and mixes with the ground stabilization material so that the above-mentioned contaminants do not diffuse as much as possible in-situ, and the technology of the in-situ mixing processing device used for the implementation of this method Belonging to the field.
[0002]
[Prior art]
In general, contamination by dioxins, heavy metals such as lead and mercury, polychlorinated bifinyl (pcb), etc. is common in inland seas and harbors. The idea of countermeasures such as dioxins in contaminated sea areas, rivers, lakes, etc. is to first take measures against the source and suppress the expansion of the contamination range. Originally, it is desirable to remove and remove bottom mud (contaminated soil, etc.) contaminated with dioxins. However, the layer thickness of the bottom mud is usually very thin, about 30cm to 100cm, and on average about 50cm. Currently, there is no suitable machine or work boat to remove this cleanly. Is real. Moreover, even if it can be removed, a large amount of money and labor are required for the detoxification treatment of the dredging and the removed bottom mud, and it is often difficult to secure a place for final disposal.
[0003]
Conventionally, a method of trapping the bottom mud by soaking sand with an appropriate layer thickness on the contaminated bottom mud (referred to as laid sand) and forming so-called covered sand covering the contaminated soil or the like is sometimes performed. However, there is a drawback that the diffusion of dioxins into water cannot be permanently prevented.
[0004]
  Therefore, for the purpose of solidifying with a ground stabilizer in the original position in the water so that the pollutants do not diffuse, the applicant of the present application is Japanese Patent Application No. 2002-117844.(Patent No. 3610458)The invention “in-situ mixed processing method and in-situ mixed processing apparatus for contaminated soil in water bottom” is proposed. This is because solidification treatment is considered to be particularly effective when the concentration level of dioxins in the bottom mud is a value equal to or higher than the sediment environmental standard value. Even if the bottom mud contaminated with dioxins is solidified, the content of dioxins is not reduced. However, dioxins are difficult to dissolve in water, and are thought to move and diffuse by adhering to suspended or suspended substances (so-called SS). Therefore, solidification of the bottom mud ground suppresses the generation of SS. it can. As a result, the bottom mud contaminated with dioxins or the like hardly moves, and an effect of preventing diffusion can be expected.
[0005]
[Problems to be solved by the invention]
In the case of the above-mentioned prior application, the structure is devised so that the in-situ contaminants are not diffused as much as possible, but there are still some that are not sufficient. For example, it is considered that the number of stirring and mixing shafts is reduced to the minimum necessary, the diameter of the stirring blade is made as small as possible, and the lower the rotational speed, the less the contaminants diffuse. However, with such a configuration, the area that can be solidified at a time is reduced and work efficiency is deteriorated. In addition, the mixing effect of stirring and mixing deteriorates, and the solidification process takes a lot of time. Not only that, but the presence of unprocessed portions that always occur between adjacent stirring and mixing shafts makes it difficult to achieve a uniform and high-quality solidification process, so how to solve these problems is a problem.
[0006]
In addition, if a large number of large-diameter mixing shafts are used, not only the degree of diffusion of pollutants at the bottom of the water during processing is increased, but also the power required for rotational driving of the stirring / mixing shaft is increased, resulting in an expensive and large-sized drive. This is also a problem to be solved because an apparatus is required.
[0007]
The object of the present invention is to diffuse the pollutants as much as possible from the bottom mud ground (contaminated soil, etc.) that forms the bottom of ports, rivers, lakes, etc. contaminated with dioxins, heavy metals, polychlorinated bifinyl, etc. It is an object of the present invention to provide a method for solidifying so as not to cause insolubilization and confining heavy metals as required, and an in-situ mixing apparatus used for carrying out the method.
[0008]
The next object of the present invention is to expand the range of stirring and mixing by causing the plurality of stirring and mixing shafts to rotate and revolve, to sufficiently enhance the mixing effect, and to ensure that the mixing and mixing shafts are adjacent to each other. Contaminated soil on the bottom of the water, etc. that can eliminate unprocessed parts that occur, perform uniform and high-quality solidification treatment, shorten the time required for solidification treatment as much as possible, and shorten the construction period In-situ mixing processing method and an in-situ mixing processing apparatus used for carrying out the method.
[0009]
A further object of the present invention is to continuously increase the area that can be solidified at a time by combining the horizontal movement of a fixed stroke in addition to the operation of revolving while rotating a plurality of stirring and mixing shafts as described above. The number of axes of the stirring and mixing shafts can be relatively reduced, the diameter of the stirring blades can be reduced, and the rotational speed can be made as low as possible to allow the diffusion of contaminants. In-situ mixing processing method, which requires less power for rotation and revolution of the stirring and mixing shaft and can be used with an inexpensive and small drive unit, and in-situ mixing used for the implementation of this method It is to provide a processing device.
[0010]
[Means for Solving the Problems]
  As a means for solving the above-described problems of the prior art, an in-situ mixing treatment method such as water-bottom contaminated soil according to the invention described in claim 1 is:
  In-situ mixing processing equipmentIn the mixing treatment casing 8 opening downward,pluralVertically downwardStir and mix shaft 18The outer diameter circles (A) of the respective stirring blades 18a are arranged so as to wrap around each other or in contact with each other, and the upper portions thereof are rotatably supported by the revolution bearing box 16, and the plurality of revolution bearing boxes 16 are also respectively The revolution outer circles (B) of the stirring and mixing shafts 18 respectively supported by the revolution bearing boxes 16 are arranged inside the mixing treatment casing 8 so as to wrap around each other or in contact with each other.
  Of the above configurationThe mixing treatment casing 8 is lowered toward the contaminated soil or the like 101 at the bottom of the water, and the stirring and mixing shaft 18 is at a depth where the mixing and mixing shaft 18 is located in the layer of the contaminated soil or the like 101.In addition, the side plate 8b of the mixing treatment casing 8 is at a depth position for partitioning the contaminated soil 101 vertically.The stirring and mixing shaft 18 is rotated in the mixing treatment casing 8 while maintaining the set state.And each revolving bearing box 16RevolveAnd stir contaminated soil 101 in-situIn addition, a cement-based solidified material or other ground stabilizing material having a low PH value is injected and mixed by stirring to solidify the contaminated soil 101 in the bottom of the water in situ.
[0011]
  The invention described in claim 2 is the in-situ mixed treatment method for contaminated soil in the bottom of the water according to claim 1,
  Set the depth position for the contaminated soil etc. 101Inside the mixed processing casing 8In eachRotates the stirring and mixing shaft 18And each revolving bearing box 16By revolving, contaminated soil 101 in the bottom of the waterIn the mixed processing casing 8In situInjecting ground stabilizerA stage of solidification by stirring and mixing;
  after thatIn,The side plate 8b located in the front and rear in the traveling direction in the mixing processing casing 8 is pulled up to an unobstructed height, and the mixing processing casing 8 is maintained at the set depth position.Agitating and mixing shaft 18 rotates at low speedFurthermore, the revolution bearing box 16 is also at a low speed.While revolving, the mixing treatment casing 8 is moved substantially horizontally by a certain stroke in a certain direction, and at the position where it is horizontally moved.Lower the side plate 8b of the mixing treatment casing 8 to its original position.101 underwater contaminated soil, etc.Injecting ground stabilizerThe solidification treatment range is continuously expanded by the step of performing the solidification treatment by stirring and mixing.
[0012]
  The invention described in claim 3 is an in-situ mixed treatment method for contaminated soil in the bottom of the water according to claim 1 or 2,
  On top of contaminated soil 101In advanceThe sand is spread with an appropriate layer thickness, and the mixing treatment casing 8 is at leastDepending on the sandThe layer of sand cover 102 is partitioned vertically, and the mixing shaft 18 is set to a depth where the mixing shaft 18 is located within the layer of the contaminated soil 101.Injecting ground stabilizerA solidification process is performed by stirring and mixing.
[0014]
  Claim4The invention described in claims 1 to3In-situ mixed treatment method such as contaminated soil in the bottom of water described in any one of
  The mixed processing casing 8 lowers the water in the casing toward the contaminated soil etc. 101 at the bottom of the water while draining the water outside the casing.VerticallyPartition and mix the contaminated soil 101 with the stirring and mixing shaft 18Inject ground stabilization material in situThe mixture is stirred and solidified, and then the mixing treatment casing 8 is lifted together with the stirring and mixing shaft 18 while supplying outside water into the mixing treatment casing 8.Pull up from the bottomIt is characterized by that.
[0015]
  Claim5The invention described in claims 1 to4In-situ mixed treatment method such as contaminated soil in the bottom of water described in any one of
  The ground stabilizing material is characterized by containing an elution preventing agent that enhances insolubilization of pollutants such as contaminated soil at the bottom of the water 101.
[0016]
  Claim6In-situ mixing treatment equipment for contaminated soil at the bottom of the water according to the invention described in
  A plurality of agitation and mixing shafts 18 are arranged vertically downward in a box-shaped mixing treatment casing 8 that opens downward, and the upper portions of the plurality of agitation and mixing shafts 18 forming a set form a common revolution bearing box 16. Being supported rotatably,
  The mixing treatment casing 8 and the upper frame 6 located on the water surface above the casing 8 are rigidly connected by a vertical column 9 having a sufficiently high horizontal rigidity,
  The vertical rotation drive shaft 10 positioned at the center of revolution of the above-mentioned revolution bearing box 16 is rotatably supported by bearings 11 and 12 installed on the mixing casing 8 and the upper mount 6, respectively, and rotates for rotation. The rotation drive device 30 for rotationally driving the shaft 10 is provided;
  Transmission mechanisms 25 and 26 for transmitting the rotation of the rotation drive shaft 10 as rotation of each stirring and mixing shaft 18 supported by the revolving bearing box 16 are provided;
  The revolving bearing box 16 is supported by a hollow rotating shaft 17 rotatably installed on the outer periphery of the rotation driving shaft 10, and the revolving bearing box 16 revolves through the hollow rotating shaft 17. The drive device 20 is installed;
  A rotational phase adjusting mechanism 23 for revolving each revolving bearing box 16 with a constant phase difference;
  The upper gantry 6 is supported by a clamp mechanism 5 that is movable in the vertical direction along the tower guide 4 of the soil conditioner.
  A means 7 for raising or lowering the upper frame 6 and the mixing treatment casing 8 along the tower guide 4 while maintaining a substantially horizontal posture, a means for controlling the operation of the rotation driving device, etc. Means for supplying a material slurry or the like is provided.
[0017]
  Claim7The invention described in claim 16In-situ mixing treatment equipment for contaminated soil at the bottom of the water
  The clamp mechanism 5 that can move up and down along the tower guide 4 and the upper frame 6 are connected by horizontal moving devices 35 and 36) that reciprocate in a certain stroke in the horizontal direction, and drive means 38 of the horizontal moving device. Is provided.
[0018]
  Claim8The invention described in claim 16In-situ mixing treatment equipment for contaminated soil at the bottom of the water
  The substantially vertical side plate 8b forming the mixing processing casing 8 is divided into a plurality of pieces, each side plate 8b is individually slidably installed in the vertical direction, and provided with slide drive means for each side plate. To do.
[0019]
  Claim9The invention described in claim 16In-situ mixing treatment equipment for contaminated soil at the bottom of the water
  The rotation driving device 30 and the revolution driving device 20 are each driven by a separate power source.
[0020]
  Claim10The invention described in claim 16In-situ mixing treatment equipment for contaminated soil at the bottom of the water
  The rotation drive device 30 and the revolution drive device 20 are each configured to be driven by a common power source installed on the upper frame 6.
[0021]
  Claim11The invention described in claim 16In-situ mixing treatment equipment for contaminated soil at the bottom of the water
  The upper frame 8a of the mixing treatment casing 8 is provided with a submersible pump that drains the water in the mixing treatment casing to the outside when lowered, or supplies the outside water to the mixing treatment casing when raised. To do.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, illustrated embodiments of the present invention will be described.
  1 and 2 are claimed.6An embodiment of an in-situ mixed processing method for contaminated soil in the bottom of the invention according to the first aspect of the present invention is shown by the in-situ mixing processing apparatus according to the described invention.
  In the figure, reference numeral 100 is the bottom soil, 101 is a layer (bottom mud) such as contaminated soil deposited on the bottom soil 100, and 102 is formed by laying sand on the contaminated soil 101. Refers to sand cover. However, as will be described later, the sand covering 102 is not an essential condition of the in-situ mixing treatment method according to the present invention.
[0023]
  Claim6As shown in FIGS. 1 and 2, the in-situ mixing processing apparatus according to the described invention includes a mixing processing casing 8 in which a plurality of stirring and mixing shafts 18 are vertically downwardly opened and an upper frame above the water surface. 6 constitutes a main part, and both are integrally rigidly connected by a steel pipe support 9 having a sufficiently large horizontal rigidity.
  As shown in FIGS. 1 and 2, a tower guide 4 perpendicular to a soil conditioner 3 installed on a dedicated work ship 2 floated on the water surface 1 is provided, and can be slid up and down along the tower guide 4. The upper mount 6 is supported by the clamp mechanisms 5 and 5. The upper gantry 6 is further suspended by two crane wires 7 and 7 which are lifting and lowering means, and a vertical raising and lowering operation is performed by a winch (not shown).
[0024]
A mixing treatment casing 8 is disposed at a position (underwater) of about 10 and a few meters directly below the upper gantry 6, and the upper frame 8 a of the mixing treatment casing 8 and the lower frame 6 a of the upper gantry 6 have a sufficiently large horizontal rigidity. 9 is rigidly connected (see FIG. 8). Therefore, the in-situ mixing process of the contaminated soil 101 or the like on the bottom of the water having a water depth of about 10 m in a harbor or the like can be performed. In that case, the upper frame 6 is always located above the water surface 1 as shown in FIG. 1, and the stirring and mixing shaft 18 of the lower mixing treatment casing 8 reaches the contaminated soil or the like 101 in the bottom of the water to perform the in-situ mixing treatment. It is configured to do.
[0025]
Between the upper frame 8a of the mixing treatment casing 8 and the upper frame 6b of the upper frame 6, a long rotation drive shaft 10 is arranged in parallel with the steel pipe column 9, and each square shape as shown in FIG. A total of four are installed at equidistant positions so as to be located at the apex. As shown in FIG. 8, each rotation drive shaft 10 is rotatable by bearings 11 and 11 installed on the upper frame 8 a of the mixing treatment casing 8 and bearings 12 and 12 installed on the upper frame 6 b of the upper frame 6. It is supported. Then, as a rotation drive device, one rotation drive motor 10 (or a hydraulic motor or the like) is installed on one rotation drive shaft 10 on the upper frame 6b of the upper gantry 6, and its output shaft. And the driven gear 32 fixed to the rotation drive shaft 10 are meshed in the box-shaped casing of the upper frame 6b, and the rotation motor 30 rotates the rotation drive shaft 10 at a required rotation speed. It is set as the structure to drive. An intermediate portion of each rotation drive shaft 10 is also supported by an intermediate bearing 15 installed with a radial arm in the middle of the steel pipe column 9 (see FIG. 6 and the like).
[0026]
A swivel joint 13 is provided at the upper end of each rotation drive shaft 10, and although not shown, a hose guided from a ground stabilizer slurry production / supply device installed on the dedicated work ship 2 is connected. A swivel joint 14 is also provided at the lower end portion of each rotation drive shaft 10 so as to be attached to the revolution bearing box 16, and the ground stabilizing material sent in the hollow portion of the rotation drive shaft 10 made of a tubular body. The slurry is configured to reach the swivel joint 14 at the lower end. The swivel joint 14 at the lower end of the rotation drive shaft 10 and the swivel joint 28 provided at the upper end of each stirring and mixing shaft 18 supported by the revolution bearing box 16 having the rotation drive shaft 10 as the center of revolution are flexible. Either a spout (lower discharge port) provided near the lower end of the stirring and mixing shaft 18 manufactured as a tubular body connected by a hose, or a spout (upper discharge port) provided along the stirring blade 18a It is set as the structure which inject | pours a ground stabilizer slurry into the stirring soil from either or both. The injection control of the ground stabilizer slurry is performed by an onboard operation management (control) device (not shown).
[0027]
The revolution bearing box 16 is integrally supported by being coupled to the lower end portion of the hollow rotary shaft 17 rotatably supported by the upper and lower bearings 11 and 11 installed on the upper frame 8a of the mixing treatment casing 8. (See FIG. 8). That is, the lower part of the rotation drive shaft 10 is inserted into the hollow rotary shaft 17, and both shafts are combined in a relatively rotatable relationship. The rotation drive shaft 10 and the revolution bearing box 16 are combined in such a manner that the upper and lower sides thereof can be rotated by bearings.
[0028]
As a revolving drive device for rotating (revolving) the revolving bearing box 16, a completely waterproof revolving motor 20 (or a hydraulic motor or the like) is provided on the upper frame 8 a of the mixing treatment casing 8. A total of 4 units are installed at a rate of 1 unit per 17 units. A driving gear 21 attached to the output shaft of each revolving motor 20 and a driven gear 22 fixed to the hollow rotating shaft 17 are meshed in a box-shaped hollow portion formed as the upper frame 8a, to the revolving bearing box 16. It is set as the structure which provides rotation (what is called revolution) of required speed. Further, interlocking gears 23 and 23 separately attached to the respective hollow rotary shafts 17 as the rotational phase adjusting mechanism are meshed with each other. Accordingly, the revolution bearing boxes 16 supported by the hollow rotary shafts 17 are configured such that adjacent ones rotate (revolve) without causing interference while maintaining a phase difference of about 90 ° from each other ( (See FIG. 3).
[0029]
In the case of the present embodiment, the upper ends of the stirring and mixing shafts 18, 18 that are paired in one revolving bearing box 16 are arranged vertically symmetrically with the rotational drive shaft 10 as the center. It is installed and is rotatably supported by bearings 19 and 19 installed above and below the revolving bearing box 16. As described above, since four rotation driving shafts 10 are installed, a total of eight stirring and mixing shafts 18 are installed (FIG. 3). However, the number of the stirring and mixing shafts 18 supported by one revolution bearing box 16 is not limited to two. As long as a necessary space is secured for the planetary gear 26 that meshes with the sun gear 25 described below, a larger number of them may be installed, and the arrangement is not limited to the above-described symmetrical arrangement. At the lower part of each stirring and mixing shaft 18, a plurality of stirring blades are concentrated from the lower end to the upper side within the range of the layer thickness of the contaminated soil 101 to be treated in water (usually about 30 cm to 100 cm as described above). 18a are provided in different directions by 90 ° in the vertical direction.
[0030]
Each stirring and mixing shaft 18 rotatably supported by the revolution bearing box 16 as described above meshes with the sun gear 25 attached to the rotation drive shaft 10 located in the center of the hollow portion of the revolution bearing box 16. A planetary gear 26 is provided (FIG. 8).
Therefore, it is installed in the upper frame 8a of the mixing treatment casing 8 with respect to the rotation (direction and speed of rotation) of the sun gear 25 rotated through the rotation drive shaft 10 by the rotation motor 30 on the upper frame 6. According to the direction and speed at which the revolving bearing box 16 is rotated through the hollow rotating shaft 17 by the revolving motor 20, the stirring and mixing shafts 18 and 18 supported by the revolving bearing box 16 are rotated around the sun gear 25. Perform a revolving revolution. As a result, the planetary gear 26 that meshes with the sun gear 25 is given rotation (spinning) at a constant speed in a fixed direction to each stirring and mixing shaft 18, 18 according to the principle of a known planetary gear device. Supply of electric power to each of the electric motors 20 and 30 and drive control of rotation are performed by a generator (not shown) mounted on the dedicated work ship 2 and an operation management (control) device.
[0031]
Therefore, the plurality of stirring and mixing shafts 18, 18... Arranged in the mixing treatment casing 8 as shown in FIG. 3 are first rotated along with their rotations, with the rotating outer diameter circle diameter (for example, 1100 mm, However, the contaminated soil 101 deposited on the bottom of the water in the original position is agitated in the cylindrical shape A having a size equal to the lap length between the rotating outer diameter circles of 100 mm. Mix with low ground stabilizer and solidify.
[0032]
At the same time, each of the stirring and mixing shafts 18, 18... Revolves according to the rotation of the revolving bearing box 16 in units of groups supported by the revolving bearing box 16. The revolving circle diameter is added to the circle diameter (1100 mm), and solidified to a large cylindrical shape B having a diameter of about 2000 mm, for example. FIG. 4a specifically shows the state of the solidification treatment. The four cylindrical Bs formed around the four rotation drive shafts 10 have a necessary and sufficient wrap length between the revolution outer diameter and the circle diameter of the stirring blades. As a result of the revolution of the stirring and mixing shafts 18, 18,..., No unprocessed part is generated within the individual cylindrical shapes B. In addition, since a double stirring and mixing process by rotation and revolution is performed, the mixing effect is excellent, and a uniform and high-quality solidification process is possible. As shown in FIG. 4a, a theoretically unprocessed portion is generated in the central portion C of the four cylindrical shapes B. The central portion C is broken by the stirring and mixing operation of the four peripheral cylindrical shapes B. Therefore, the stirring and mixing are sufficiently effective, and it does not become a substantially untreated part.
[0033]
  As described above, the arrangement of the stirring and mixing shafts 18, 18... Supported by the revolution bearing box 16 is such that the rotation outer diameter circles of the individual stirring blades 18a wrap around each other as shown in FIG. It does not have to be configured. As shown in FIG. 4b, the same excellent mixing effect can be obtained even when the rotation outer diameter circles of the stirring blades 18a of the stirring and mixing shafts 18, 18 ... supported by the revolution bearing box 16 are in contact with each other. And uniform and high-quality solidification processing is possible.The
[0034]
In addition, according to the rotation and revolution combined system of the present invention, the total area of the four columnar shapes B (so-called solidification treatment as shown in FIGS. Improved area) is about 11m2Since it becomes so large that it becomes strong, it is excellent in the capability and efficiency of a solidification process, and can shorten processing time (construction period). Paradoxically speaking, even if the rotation circle outer diameter of the stirring blades 18a of the individual stirring and mixing shafts 18 and 18 is relatively small, the revolution circle outer diameter is sufficiently large. There is no adverse effect. When the outer diameter of the rotating circle of the stirring blade 18a is small, the shaft torque for rotating and revolving the stirring and mixing shafts 18 and 18 may be small, and the output of the motors 20 and 30 is small and small capacity (for example, 4 horsepower). To about 6 horsepower) and can be made inexpensive. Regarding the rotational speed of the stirring and mixing, for example, a low speed operation with a revolution speed of about 3 to 15 rpm and a rotation speed of about 5 to 25 rpm is sufficient. As a result of being able to operate at a low speed in this way, it is possible to suppress as much as possible the disturbance and turbidity of the contaminated soil and the like in the stirring and mixing portion, and a great effect can be obtained in suppressing the diffusion of contaminants into water.
[0035]
As described above, in-situ contaminated soil 101 and the like deposited on the bottom of the water is cemented solidified material or other ground having a low PH value by a plurality of stirring and mixing shafts 18 in a closed space limited by the mixing treatment casing 8. Since the work of stirring and mixing with the stabilizer is performed, the diffusion of contaminants and turbidity in water is suppressed as much as possible. In order to sufficiently achieve such an object, the mixing treatment casing 8 includes a substantially vertical side plate 8b that surrounds the four sides thereof, and thus has an opening downward. Incidentally, the size and shape of the opening are formed in a square having an inner dimension of about 3.5 m on one side in FIG.
[0036]
  Moreover, in the illustrated embodiment, the side plate 8b forming the mixing treatment casing 8 is divided into four in units of each side of the square, and each divided side plate 8b is individually slid in the vertical direction. A drive means is provided which is slidable and slides each side plate 8b individually in the vertical direction.8Described invention). In the case of the illustrated embodiment, the illustration of the driving means for individually sliding the side plates 8b in the vertical direction is omitted, but a link mechanism system driven by a hydraulic cylinder or the like or a completely waterproof type is omitted. Means such as a pinion rack mechanism that is rotationally driven by an electric motor or a hydraulic motor can be implemented.
[0037]
  Next, the relationship between the clamp mechanism 5 and the upper gantry 6 that are movable up and down along the tower guide 4 described above is connected by a horizontal movement device that reciprocates with a constant stroke in the horizontal direction in the illustrated embodiment. Has been. As shown in FIG. 8, two moving members 35 of a rigid hollow steel pipe structure are supported so as to be horizontally movable by slide bearings 36 fixed to the lower frame 6a and the upper frame 6b of the upper frame 6, respectively. Yes. Each moving member 35 has its front end rigidly connected to each clamp mechanism 5. A hydraulic cylinder 38 supported by a trunnion bearing 37 provided with one end fixed to the lower frame 6a or the upper frame 6b so as to be swingable in the vertical direction is installed as a driving means for horizontal movement (FIG. 6, 7). A front half portion of each hydraulic cylinder 38 is disposed in a hollow portion of the moving member 35, and an output shaft 38a of the hydraulic cylinder 38 is pin-connected to the clamp mechanism 5 (Claims).7Invention described in the above).
[0038]
Therefore, by performing control to expand and contract the hydraulic cylinders 38 in synchronism all at once, the movable upper frame 6 and the movable upper frame 6 can be moved relative to the tower guide 4 and the clamp mechanism 5 that are kept relatively stationary on the dedicated work ship 2. The mixed processing casing 8 integrally rigidly connected with the steel pipe support 9 is moved equally in the horizontal direction together with the moving member 35 within the range of the expansion / contraction stroke (for example, about 1 m) of the hydraulic cylinder 38.
As shown in FIG. 6, a travel distance meter (stroke sensor) 39 such as a potentiometer is installed on the sliding bearing 36, and the tip of the measuring wire 40 is fixed to the clamp mechanism 5. . Accordingly, the moving stroke of the moving member 35 is accurately measured in real time by the moving distance meter 39, input to the operation control device for the in-situ mixing process prepared on the dedicated work ship 2, and recorded and displayed. It is used for operation control of horizontal movement.
[0039]
On the premise of the in-situ mixing processing apparatus having the above-described configuration, the in-situ mixing processing method for contaminated soil on the bottom of the water according to the invention described in claim 1 is performed as follows.
In general, first, laid sand is applied on the contaminated soil 101 on the bottom of the water to be treated so as to have an appropriate layer thickness, and the sand cover 102 is formed in the planned implementation range of the in-situ mixed treatment method. In this way, disturbance, scattering, and scattering of the contaminated soil 101 during the mixing treatment can be suppressed as much as possible, and sand is mixed during the solidification treatment, which increases the strength of the solidified product. Invention). However, when the stability of the contaminated soil 101 or the like is high, or when the sand component is large, the laid sand and the covered sand 102 are not necessarily essential (the invention according to claim 1).
[0040]
The in-situ mixing processing apparatus moves the dedicated work ship 2 to a work position in the sea area where the above-described in-situ mixing processing method is to be performed, and operates a winch (not shown) on the dedicated work ship 2 to By the method of moving the clamp mechanism 5 of the upper gantry 6 along the tower guide 4 by the self-weight action of loosening the crane wires 7, 7, the upper gantry 6 and the steel pipe column 9 are rigidly coupled together. The processing casings 8 are lowered vertically toward the contaminated soil 101 on the bottom of the water.
[0041]
  In this way, the mixing processing casing 8 that opens downward and has a plurality of stirring and mixing shafts 18... Divides at least the layer of the sand cover 102 vertically by the side plates 8b.depthSet to position. At this time, each stirring and mixing shaft 18 in the mixing treatment casing 8 is set so as to be located in a layer of the contaminated soil 101 or the like under the sand covering 102. As a means for this, the axial length of each stirring and mixing shaft 18 and the mounting position of the stirring blade 18a (position protruding from the lower edge of the side plate 8b) are appropriately designed and manufactured in advance so as to satisfy the above two conditions. In addition, the height position of each side plate 8b of the mixing processing casing 8 is adjusted by moving up and down by a slide driving means on the premise of the axial length of each stirring and mixing shaft 18 and the design and manufacturing dimensions of the stirring blade 18a. A method etc. can be implemented selectively or in combination.
[0042]
When the above-described position setting is confirmed, the operation of the in-situ mixing processing apparatus is started, and each stirring and mixing shaft 18 is rotated and revolved at a predetermined speed and direction in the mixing processing casing 8 and is cemented. Materials and other ground stabilizers with a low pH value are sent from the ship manufacturing and supply device and injected into the ground from the lower discharge port at the tip of each stirring and mixing shaft 18 and from the upper discharge port to the ground, etc. By stirring and mixing, the contaminated soil or the like 101 in the bottom of the water is solidified by mixing and mixing carefully in the original position due to the mixing effect by the rotation and revolution of each stirring and mixing shaft 18. Specifically, as shown in FIG. 4a, solidification processing is performed into a large-diameter columnar shape B (as described above, the solidification processing area once is 11 m).2strength).
[0043]
  It is effective for uniform solidification treatment to inject the cement-based solidified material and other ground stabilizing materials having a low PH value from both the lower discharge port and the upper discharge port described in paragraph [0026] above. In addition, according to the components contained in the contaminated soil 101 such as the bottom of the water, more specifically, when a heavy metal component is contained in a large amount, the chelating reaction that surrounds the heavy metal with a polymer compound and insolubilizes the ground stabilizer. It is also effective to contain a high dissolution inhibitor (chelating agent)5Described invention).
[0044]
As shown in FIG. 4a or b, the in-situ mixing processing method of the present invention stops the rotation and revolution of the stirring and mixing shafts 18 ... The stirring and mixing shaft 18 is once raised vertically until it escapes upward from the covering sand 102, and then the dedicated work ship 2 is advanced to the work area of the next process, and the mixing treatment casing 8 is lowered again to the bottom position. The procedure of stirring and mixing the contaminated soil 101 in the original position and solidifying the same can be repeated one after another.
Alternatively, as another procedure, after the solidification processing by the stirring and mixing shaft 18 is completed, the mixing processing casing 8 is not moved up vertically with the stirring and mixing shaft 18 as described above, but kept at a certain height position. First, only the side plates 8b and 8b located in the front and rear in the moving direction of the moving member 35 of the upper gantry 6 are raised to a position where they can be pulled out to the upper surface of the sand covering 102. Then, the speed of rotation and revolution of each of the stirring and mixing shafts 18 is reduced to a low speed that does not cause the diffusion of contaminants, for example, a low speed rotation that is less than half that of a normal solidification treatment operation (when the rotation is stopped, it moves laterally). In this state, the hydraulic cylinder 38 of the horizontal moving device is extended and the measured value of the moving distance meter 39 is confirmed while the moving member 35 is moved in the moving direction of about 1 m, for example. Only slowly move almost horizontally. In this way, when the horizontal movement limit position is reached, the speed of rotation and revolution of each stirring and mixing shaft 18 is increased to the normal solidification speed, and the contaminated soil 101 is continuously solidified and processed. A procedure for enlarging the area can be performed (the invention described in claim 2).
[0045]
Then, as illustrated in the construction state diagram in FIG. 5, the solidification treatment of the cylindrical shape B is continuously expanded like an oval shape B ′, and is approximately 15 m in one place.2The solidification process in the range expanded to a weak level can be performed continuously, and the construction efficiency is extremely high. Moreover, there is no unevenness in the stirring and mixing process, and a high-quality solidified product can be obtained.
After completing the continuous solidification process in one section as shown in FIG. 5, the whole in-situ mixing processing apparatus is also moved vertically upward with the winch on the ship, and the dedicated work ship 2 is advanced to the next work position as it is. At that position, the solidification process of the next work section is sequentially executed again.
[0046]
However, the method for expanding the solidification processing region to the continuous state as shown in FIG. 5 is not limited to the operation by the horizontal movement device. For example, the soil improvement machine 3 installed on the dedicated work ship 2 can be similarly implemented as a configuration in which the tower guide 4 reciprocates with a constant stroke along a track laid on the ship. Or the solidification processing area | region can be expanded continuously by maneuvering and advancing the exclusive work ship 2 itself. The moving direction of such a method may be either vertical or horizontal.
[0047]
Regardless of which solidification processing procedure is performed, the relationship between the solidified material in the immediately preceding work section and the boundary portion of the next sequential work section is that the revolution circle outer diameter B of each stirring blade 18a always secures the designed wrap length. It is important to perform the solidification process so that the part is shared as indicated by reference numeral D in FIG. 9 to eliminate the unprocessed part and to integrate the solidified product. It has been described above that the portion indicated by the symbol C in FIG. 9 has the effect of the substantial solidification process (paragraph number [0032]).
FIG. 9 also shows that the matrix indicated by (I) and the matrix indicated by (II) are shifted by ½ pitch so that the unprocessed portion of the solidification process does not occur at the part indicated by E in the figure. An example is shown.
[0048]
  In addition, the mixed processing casing 8 having an opening downward but having a closed box structure is lowered downward in water toward the contaminated soil or the like 101 in the bottom of the water, and each side plate 8b has at least the above sand-covering sand. In the case where the layer 102 is set to a height position that vertically divides the layer 102, the resistance of the water is greatly received, and as a result, there is a concern that a water flow or a vortex flow is generated and the pollutant is diffused.
  As a countermeasure for this, the present invention drains the water in the mixing treatment casing 8 onto the upper frame 8a of the mixing treatment casing 8 in advance and minimizes the resistance of the water accompanying the lowering of the mixing treatment casing 8 as much as possible. Water that supplies water outside the mixing treatment casing 8 to such an extent that a kind of negative pressure phenomenon occurs when the mixing treatment casing 8 is raised or the surrounding water and contaminated soil 101 on the bottom of the water are not sucked. A pump (not shown) is installed in the mixing treatment casing 8 (claims)11Invention described in the above).
[0049]
  According to the submersible pump described above, when the mixed processing casing 8 having a box-shaped structure that has an opening downward, but is otherwise sealed down, is lowered vertically toward the contaminated soil or the like 101 in the water bottom vertically, By draining the water in the mixing treatment casing 8 to the outside of the casing with the submersible pump, it is possible to lower the water resistance toward the contaminated soil 101 or the like 101 without causing turbulence while reducing the resistance of the water. In addition, after the contaminated soil 101 is agitated and mixed by each agitating and mixing shaft 18 and solidified, outside water is supplied into the mixing treatment casing 8 by the submersible pump, so that a so-called negative pressure phenomenon does not occur. By doing so, the mixing casing 8 and the stirring and mixing shaft 18 can be gently raised while avoiding the disadvantage of sucking up the surrounding water 101 and the contaminated soil 101 in the bottom of the water (claims).4Invention described in the above).
  In addition, in carrying out the above-mentioned in-situ treatment method for contaminated soil at the bottom of the water, all operations and controls required for the in-situ mixing treatment device are performed through an operation management (control) device installed on the dedicated work ship 2. .
[0050]
Next, FIG. 10 shows a different embodiment of the upper frame 6. In the present embodiment, the upper frame 6 has a structure in which the lower frame 6a and the upper frame 6b are completely separated vertically. The steel pipe support 9 penetrates the lower frame 6a, and its upper end is rigidly connected to the upper frame 6b. The upper part of the rotation drive shaft 10 is also supported by a bearing installed on the upper frame 6b. On the other hand, the lower frame 6a is disposed at an underwater position lower than that of the intermediate bearing 15, and the clamp mechanism 5 extends deeply into the water so as to be supported by the support arm 50 protruding into the water from the lower part of the hull of the dedicated work ship 2. The extended tower guide 4 is slidably supported. In short, the steel pipe column 9 is supported at two points, namely, the lower frame 6a and the upper frame 6b with the upper part thereof being widely spaced vertically, so that the state of supporting the lower mixing treatment casing 8 is extremely stable. . In particular, as described in paragraph [0044], the mixing treatment casing 8 is horizontally moved in water by a horizontal movement device or by a method of maneuvering the dedicated work ship 2 as in paragraph [0046], and solidified. When implementing the technique of continuously expanding the area, it is effective to reduce the burden on the steel pipe support 9 and realize stable horizontal movement.
[0051]
Finally, FIG. 11 shows that the power source (electric motor 30) of the rotation driving device and the power source (electric motor 20) of the revolution driving device are shared by one, and the upper frame 6 always located on the water surface. The embodiment of the in-situ mixing processing apparatus comprised so that it can drive only with the electric motor 30 installed on the top is shown. The driving gear 31 attached to the output shaft of the electric motor 30 and the driven gear 32 fixed to the rotation driving shaft 10 are meshed with each other as in the embodiment of FIG. As the rotation phase adjusting mechanism of the revolution bearing box 16, the interlocking gears 23 and 23 fixed to the respective rotation drive shafts 10 are meshed with each other at the position of the upper frame 6, and the rotation phase of each rotation drive shaft 10 is determined. .
[0052]
On the other hand, in the mixing treatment casing 8, a hollow rotary shaft 17 that supports the revolution bearing box 16 is installed on the outer periphery of the lower end portion of the rotation driving shaft 10, and the upper and lower portions installed on the upper frame 8 a of the mixing processing casing 8. The bearings 11 and 11 are rotatably supported. The configuration in which the revolving bearing box 16 is integrally supported at the lower end of the hollow rotary shaft 17 is the same as that of the embodiment of FIG. The lower part of the rotation drive shaft 10 is inserted into the hollow rotary shaft 17, and both shafts are combined in a relatively rotatable relationship. As a means for rotating the hollow rotary shaft 17, in the present embodiment, a mixing treatment casing is provided between the main gear 61 fixed to the rotation drive shaft 10 and the slave gear 62 fixed to the hollow rotary shaft 17. 8 is configured such that a gear train is formed by connecting the gears 64 and 65 of the intermediate shaft 63 supported perpendicularly to the upper frame 8a of FIG. 8, and rotation at a constant speed is transmitted to the hollow rotating shaft 17 in a certain direction. This is different from the embodiment.
[0053]
Each stirring and mixing shaft 18 rotatably supported by the revolution bearing box 16 includes a planetary gear 26 that meshes with the sun gear 25 of the rotation driving shaft 10 located at the center, and the sun rotated together with the rotation driving shaft 10. The direction in which the revolving bearing box 16 is rotated by the hollow rotating shaft 17 rotated from the same rotation driving shaft 10 through the main / subordinate gear trains 61 and 62 with respect to the rotation of the gear 25 (direction and speed of rotation). According to the speed, the stirring and mixing shafts 18 and 18 supported by the revolving bearing box 16 revolve around the sun gear 25 and revolve so that the planetary gear 26 meshing with the sun gear 25 is a principle of the planetary gear device. Thus, the configuration in which the agitation and mixing shafts 18 and 18 are rotated (autorotated) at a constant speed in a constant direction is substantially the same as the embodiment of FIG.
[0054]
According to the embodiment of FIG. 11, there is no electric motor operated in water, and maintenance including electric wiring is easy. Further, the cost can be reduced by the amount that the electric motor 20 is omitted.
Reference numeral 70 in FIG. 11 is an inclinometer that measures vertical accuracy, and its output is also input to the operation management apparatus.
[0055]
【The invention's effect】
  Claim6-11According to the invention described in the above, the bottom polluted ground (contaminated soil, etc.) of the bottom of a port, river, lake, etc. contaminated with dioxins, heavy metals, polychlorinated bifinyl, etc. There is provided an in-situ mixing apparatus suitable for carrying out a solidification process in a space closed by a mixing process casing so as not to diffuse as much as possible.
  That is, when the in-situ mixing processing apparatus is used, claims 1 to5As in the in-situ mixed processing method according to the invention described above, the contaminated soil at the bottom of the water is solidified so as to contain harmful substances in-situ, and there is no concern about suspension or diffusion due to the pollutants. Of course, it is possible to reliably prevent secondary contamination that the pollutants are eluted or diffused in the water after the solidification treatment. This is because the solidified body does not deteriorate and is stable in the long term.
[0056]
Since the in-situ mixing processing apparatus of the present invention performs revolution while rotating each stirring and mixing shaft in the mixing processing casing, the mixing effect of stirring and mixing is high, and the mixing time can be shortened. And the unprocessed part which generate | occur | produces more or less between adjacent stirring mixing shafts is eliminated, and the solidification process of uniform and high quality is enabled.
[0057]
According to the present invention, revolving is performed while rotating a plurality of stirring and mixing shafts, so even if the outer diameter of the stirring blade is small, the outer diameter of the revolution circle is large, and the solidified area that can be solidified at a time is increased. Excellent work efficiency. As a result, not only can the construction period be shortened, but the number of stirring and mixing shafts can be relatively reduced, the diameter of the stirring blades can be reduced, and the rotational speed can be made as low as possible. Can be reduced. In addition, the power required for rotationally driving the stirring and mixing shaft is small, and an inexpensive and small drive device is sufficient, so that the total cost can be reduced along with the shortening of the construction period.
[Brief description of the drawings]
FIG. 1 is an elevational view showing an embodiment of an in-situ mixed treatment method for contaminated soil at the bottom of the water according to the present invention.
FIG. 2 is a side view showing the in-situ mixing processing apparatus in FIG. 1;
FIG. 3 is a bottom view of a mixing processing casing portion.
FIGS. 4A and 4B are explanatory views showing a state of solidification processing in the mixing processing casing. FIGS.
FIG. 5 is an explanatory view showing a state in which a solidification processing region in the mixing processing casing is enlarged by lateral movement.
FIG. 6 is an elevational view showing a slightly enlarged view of the upper frame and the mixing processing casing portion of the in-situ mixing processing apparatus.
7 is a plan view of the upper frame in FIG. 6. FIG.
FIG. 8 is an enlarged longitudinal sectional view showing the structure of the in-situ mixing processing apparatus.
FIG. 9 is an explanatory diagram showing an example of progress of in-situ solidification processing for contaminated soil or the like.
FIG. 10 is an elevational view showing a different embodiment of the in-situ mixing processing apparatus.
FIG. 11 is a longitudinal sectional view showing a different embodiment of the in-situ mixing processing apparatus.
[Explanation of symbols]
101 Contaminated soil
102 Covering sand
18 Stir mixing shaft
8 Mixed processing casing
16 Revolving bearing box
10 Drive shaft for rotation
8a Upper frame of the mixed processing casing
6 Upper frame
11, 12 Bearing
30 Electric motor for rotation
20 Revolving motor
9 Steel pipe support
3 soil conditioner
4 Tower Guide
5 Clamp mechanism
7 Crane wire
35 Moving member (lateral movement device)
36 plain bearings
38 Hydraulic cylinder

Claims (11)

  1. A plurality of vertically downward stirring and mixing shafts (18) are wrapped by the outer diameter circles (A) of the respective stirring blades (18a) in the mixing processing casing (8) opening downward in the in- situ mixing processing apparatus. The upper part of the revolving bearing box (16) is rotatably supported in an arrangement or an arrangement in contact with each other, and the plurality of revolving bearing boxes (16) are also supported by the revolving bearing boxes (16), respectively. A configuration in which the revolution outer circles (B) of the stirring and mixing shaft (18) are installed in the mixing treatment casing (8) in an arrangement in which they wrap around each other or in an arrangement in contact with each other,
    The mixing treatment casing (8) having the above configuration is lowered toward the contaminated soil or the like (101) on the bottom of the water, and the mixing and mixing shaft (18) is at a depth where the mixing and mixing shaft (18) is located in the layer of the contaminated soil or the like (101). The side plate (8b) of the casing (8) is set to a depth position that vertically partitions the contaminated soil etc. (101), and the stirring and mixing shaft (18) is mixed with the mixing casing (8) while maintaining the set state. ), And each revolving bearing box (16) is revolved to agitate the contaminated soil (101) in place and inject cement-based solidified material or other ground stabilization material with low PH value. An in-situ mixing treatment method for contaminated soil at the bottom of the water, wherein the contaminated soil at the bottom of the water (101) is solidified in situ by stirring and mixing.
  2. Contaminated soil at the bottom of the water by rotating each stirring and mixing shaft (18) in the mixing treatment casing (8) in which the depth position with respect to the contaminated soil (101) is set, and revolving each bearing box (16) for revolution. Etc. (101) are injected into the ground in the mixing treatment casing (8) with a ground stabilizer and stirred to mix and solidify,
    Thereafter , the side plate (8b) positioned in the front and rear of the mixing treatment casing (8) in the advancing direction is pulled up to an unobstructed height, and the mixing treatment casing (8) is kept at the set depth position with the stirring and mixing shaft (18 ) At a low speed, and the revolving bearing box (16) is also rotated at a low speed to move the mixing processing casing (8) substantially horizontally by a fixed stroke in a certain direction, and the mixing processing casing at the horizontally moved position. (8) The side plate (8b) is lowered to its original position, and the solidification treatment range is continued by the step of injecting the ground stabilizer in the original position and mixing and stirring and mixing the ground bottom contaminated soil etc. (101). The in-situ mixed treatment method for contaminated soil in the bottom of the water according to claim 1, wherein
  3. A sand layer having a suitable layer thickness is preliminarily deposited on the contaminated soil or the like (101) in the bottom of the water, and the mixing treatment casing (8) vertically divides at least the layer of the sand covering (102) by the sand layer, and a stirring mixing shaft ( 18) Set the depth to be within the layer of the contaminated soil etc. (101) , inject the ground stabilizing material in the bottom of the soil (101) under the ground, stir and mix to perform the solidification treatment. The in-situ mixed processing method for contaminated soil in the bottom of the water according to claim 1 or 2, characterized by the above.
  4. The mixed treatment casing (8) lowers the water in the casing toward the contaminated soil or the like (101) at the bottom of the water while draining the water out of the casing, and the contaminated soil or the like (101) or sand cover (102 ) Is vertically partitioned, and the soil mixing material (101) is injected into the ground with the stirring / mixing shaft (18) in place, stirring and mixing to solidify, and then the mixing treatment casing (8) is placed outside. The raw material such as contaminated soil in the bottom of the water according to any one of claims 1 to 3 , wherein the mixing treatment casing (8) is raised together with the stirring and mixing shaft (18) while water is supplied, and pulled up from the bottom of the water. Position mixing processing method.
  5. The ground stabilization material contains an elution inhibitor that enhances insolubilization of pollutants in the bottom soil contaminated soil (101), etc., and the bottom soil contaminated soil according to any one of claims 1 to 4 , In-situ mixed processing method.
  6. A plurality of stirring and mixing shafts (18) are arranged vertically downward in a box-shaped mixing treatment casing (8) that opens downward, and the upper portions of the plurality of stirring and mixing shafts (18) forming one set are common public Being rotatably supported by the diverting bearing box (16),
    The mixing treatment casing (8) and the upper frame (6) positioned on the water surface above the casing are rigidly connected by a vertical column (9) having a sufficiently high horizontal rigidity,
    The vertical rotation drive shaft (10) located at the center of revolution of the above-mentioned revolution bearing box (16) has bearings (11), (12) installed on the mixing processing casing (8) and the upper frame (6), respectively. And a rotation driving device (30) for rotating the rotation driving shaft (10) is rotatably supported.
    A transmission mechanism (25) (26) for transmitting the rotation of the rotation drive shaft (10) as rotation of each stirring and mixing shaft (18) supported by the revolving bearing box (16) is provided. ,
    The revolving bearing box (16) is supported by a hollow rotating shaft (17) rotatably installed on the outer periphery of the rotating drive shaft (10), and the revolving bearing is passed through the hollow rotating shaft (17). The revolution drive device (20) for revolving the box (16) is installed;
    A rotational phase adjusting mechanism (23) for revolving each revolving bearing box (16) with a certain phase difference;
    The upper frame (6) is supported by a clamp mechanism (5) that is movable in the vertical direction along the tower guide (4) of the soil conditioner,
    Means (7) for raising or lowering the upper frame (6) and the mixing processing casing (8) along the tower guide (4) in a substantially horizontal posture, and means for controlling the operation of the rotation driving device, etc. And means for supplying the ground stabilizer slurry to the stirring and mixing shaft (18), respectively.
    In-situ mixing treatment equipment for contaminated soil at the bottom of the water.
  7. The clamp mechanism (5) movable up and down along the tower guide (4) and the upper frame (6) are connected by horizontal movement devices (35) and (36) that reciprocate in a fixed stroke in the horizontal direction. The in-situ mixing treatment apparatus for contaminated soil in the bottom of the water according to claim 6 , characterized in that a driving means (38) for a horizontal movement device is provided.
  8. The substantially vertical side plate (8b) forming the mixing treatment casing (8) is divided into a plurality of pieces, and each side plate (8b) is individually slidable in the vertical direction, and provided with slide driving means for each side plate. The in-situ mixing treatment apparatus for contaminated soil in the bottom of the water according to claim 6 .
  9. The in-situ mixing processing apparatus for contaminated soil at the bottom of water according to claim 6 , wherein the rotation driving device (30) and the revolution driving device (20) are each driven by a separate power source.
  10. Characterized in that-rotating drive (30) and revolution drive device (20) is configured to be driven by a common power source installed on each upper platform (6), according to claim 6 In-situ mixing equipment for contaminated soil at the bottom of the water.
  11. A submersible pump is installed in the upper frame (8a) of the mixing treatment casing (8) to drain the water in the mixing treatment casing to the outside when descending or to supply the outside water to the mixing treatment casing when rising. The in-situ mixing treatment apparatus for contaminated soil at the bottom of the water according to claim 6 .
JP2003091116A 2003-03-28 2003-03-28 In-situ mixed processing method and in-situ mixed processing equipment for contaminated soil at the bottom of the water Active JP3702407B2 (en)

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Cited By (2)

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JP2007307498A (en) * 2006-05-19 2007-11-29 Kitagawa Iron Works Co Ltd Original-position mixing treatment method and original-position mixing treatment apparatus of contaminated soil of bottom of water
KR101275378B1 (en) 2013-04-19 2013-06-17 코오롱워터앤에너지 주식회사 Hybrid type soil washing method using in-situ complexly contaminated soil agitation

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JP2006198476A (en) * 2005-01-18 2006-08-03 Penta Ocean Constr Co Ltd Method for making contaminated deposit harmless
JP4580777B2 (en) * 2005-02-17 2010-11-17 小野田ケミコ株式会社 Solidification processing apparatus and solidification processing method
JP4890043B2 (en) * 2006-02-10 2012-03-07 株式会社竹中土木 Contaminated soil treatment method by deep mixing treatment
JP2018507159A (en) * 2015-02-17 2018-03-15 イタルチェメンティ エス.ピー.エー. Environmentally-friendly cement composition, its use to inactivate soot deposits / sludge, related methods and equipment for inactivation
KR101936869B1 (en) 2018-01-17 2019-01-09 한국광해관리공단 Polluted soil stabilization apparatus and method for stabilizing contaminated soil using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007307498A (en) * 2006-05-19 2007-11-29 Kitagawa Iron Works Co Ltd Original-position mixing treatment method and original-position mixing treatment apparatus of contaminated soil of bottom of water
KR101275378B1 (en) 2013-04-19 2013-06-17 코오롱워터앤에너지 주식회사 Hybrid type soil washing method using in-situ complexly contaminated soil agitation

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