JP2002266336A - Underwater placing method, underwater placing instrument, and underwater placing ship - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an underwater placing method which places a huge quantity of reclamation materials while minimizing water pollution, and to provide an underwater placing instrument and an underwater placing ship. SOLUTION: According to the underwater placing method, the oscillation angle of a tube body 30 is adjusted, and when a lower end of a cylindrical member 54 reaches a sea bottom B, the lower end of the cylindrical member 54 sinks in detritus deposited on the sea bottom B. The reclamation material is squeezed through the interior of the tube body 30 in a manner making close contact therewith by screw blades 34. Then, the reclamation material squeezed out of a lower end 3010 of the tube body 30, collides with a rectifying member 52, and then it is directed toward the interior of the cylindrical member 54, followed by colliding with the interior of the cylindrical member 54, whereby it is upward filled from below in the cylindrical member 54. Further, the reclamation material 54 which has been declined in momentum (flow rate) overflows an upper end of the cylindrical member 54 out of the same, and the reclamation material which has been declined in momentum (flow rate) is sequentially deposited on the sea bottom B at an upper end of the cylindrical member 54 in a spreading manner, to thereby place the reclamation material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a submerged landfill in which a solidified material such as cement is added to a dredged soil or the like in a landfill without submerging the dredged soil and the solidified material. The present invention relates to a casting method, an underwater casting tool, and an underwater casting boat.

[0002]

2. Description of the Related Art A solidified material such as cement is added to dredged soil and the like, and a material that is not solidified can be used as a landfill material. As a method of landfill, a method of pouring a landfill material into water through a tremy tube or a chute, and a pouring hole at the lower end of a vertically suspended casing, always burying it at a certain depth in the existing landfill A method of casting a landfill underwater (for example, Japanese Patent Publication No. 6-63214 or Japanese Patent Publication No. 6-63215) is generally used.

[0003]

However, when the landfill material is cast underwater by the above-mentioned conventional method, there are the following problems. In the above-mentioned construction method using tremee pipes and chutes, water is filled in the tremy pipes and chutes, and the dredged soil and solidified material are separated on the way to the bottom of the landfill, ensuring the quality of the landfill. And water pollution was caused. In the method of embedding the casting hole at the lower end of the vertically suspended casing at a constant depth in the already-buried soil, the state where the lower end of the casing is always embedded in the already-buried soil is maintained. It is necessary to do so, so that only a small amount of casting can be performed so as to push the previously buried soil from the inside thereof, and a large amount of earth and sand cannot be poured in a short time. That is, when a large amount of earth and sand is poured in a short time, the vibration at the lower end of the casing increases, and the momentum (flow velocity) of the landfill material flowing out from the lower end of the casing also increases. Therefore, at the lower end of the casing, it disturbs the surrounding floating mud and the previously buried soil, and the landfill material hits the water bottom and flows out radially outward of the casing. The landfill will be spread over a large area above the water floor as it is exposed to the water. As a result, water pollution occurs, and it is also unknown where the landfill material was placed. The present invention has been devised in view of the above circumstances, and an object of the present invention is to ensure the quality of a landfill material and to cast a large amount of landfill material while minimizing water pollution. It is an object of the present invention to provide an underwater casting method, an underwater casting tool, and an underwater casting boat.

[0004]

According to the present invention, there is provided a submerged casting method according to the present invention, wherein a lower end of a tubular body is opened vertically and an upper end is positioned higher than a tip of the tubular body. Is disposed below the lower end of the tubular body, and arranges a tubular member surrounding the lower end portion of the tubular body, facing the lower end of the tubular body, and landfill flowing out from the lower end. A rectifying member that strikes the material and directs the flow of the landfill material toward the inner surface of the tubular member, attaches the lower end of the cylindrical member to the bottom of the water, and rectifies the landfill material flowing out from the lower end of the tubular body. Abutting against the inner surface of the cylindrical member through the member, the flow of the landfill material is attenuated inside the cylindrical member and the landfill material is filled into the cylindrical member, From the upper end of the annular space formed by the outer peripheral surface of the tubular body and the inner peripheral surface of the cylindrical member, the reclaimed material whose momentum has been attenuated Characterized in that the landfill material to way out was such that pouring onto the bottom of the water is. Further, the underwater casting device of the present invention includes a rectifying member and a tubular member, and the rectifying member is disposed below the lower end of the tubular body and collides with a landfill material flowing out from the lower end to bury the land. The tubular member is attached to the tubular body so as to direct the material outward in the radial direction of the tubular body, and the tubular member is open vertically and has an upper end positioned higher than a lower end of the tubular body and a lower end defined in the tubular body. It is attached to the tube so as to be located below the lower end of the body and surround the lower end portion of the tube and the periphery of the rectifying member. Also, the underwater casting boat of the present invention includes a hull having a length in the front-rear direction, and an underwater casting device provided on the hull, wherein the underwater casting device extends linearly, and A pipe having a long length corresponding to the front and rear length of the pipe, a hopper provided at one end of the pipe and into which a landfill material is charged, and rotatably disposed and rotated inside the pipe. A screw blade that pushes the pipe body in a state where the landfill material is in close contact, a driving unit that rotationally drives the screw blade, and a submersible tool provided at the other end of the pipe body, wherein the pipe body is The longitudinal direction is arranged in the longitudinal direction of the hull, and the one end side is vertically swingably coupled to a forward or rearward portion of the hull to swing the pipe vertically. Dynamic driving means is provided, and the underwater casting tool includes a straightening member and a cylindrical member. The straightening member is attached to the tubular body so that the straightening member faces below the lower end of the tubular body and collides with the filled material flowing out from the lower end to direct the fill material radially outward of the tubular body. The tubular member is vertically open and has an upper end positioned higher than the other end of the tubular body and a lower end located below the other end of the tubular body, and the other end portion of the tubular body and It is attached to the pipe so as to surround the circumference of the rectifying member. Further, in the underwater casting boat of the present invention, the rocking drive means is arranged on the hull and a winch around which a wire is wound, and a wire guide provided on an outer edge of the hull,
A wire pulled out of the winch and having an end connected to the tube via the wire guide, and the tube is arranged with its length direction facing the longitudinal direction of the hull, The one end side is vertically swingably coupled to one of the front and rear portions of the hull, and the guide portion is provided on the other of the front and rear portions of the hull. I do.

According to the present invention, the quality of the landfill material can be ensured, and a large amount of landfill material can be reliably poured in a short time while suppressing water pollution.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The underwater casting method according to the present invention will be described below with reference to the accompanying drawings together with an underwater casting tool and an underwater casting boat. FIG. 10 is an explanatory view showing the positional relationship among a submerged casting ship, a solidification treatment ship, a solidified material plant ship, and a soil carrier ship. As shown in FIG. 10, for example, a submerged casting boat 12, a solidification processing boat 14, and a solidification material plant boat 16 are arranged on the sea via anchors. In FIG. 10, reference symbol R denotes an anchor rope. The dredged soil is conveyed from the earth transport vessel 18 to the solidification processing vessel 14, the cement milk produced by the solidification material plant vessel 16 is supplied to the solidification processing vessel 14, and the dredged soil and the cement milk are agitated and mixed in the solidification processing vessel 14. Landfill material. Then, the landfill material is pressure-fed to the underwater casting boat 12 by air through the offshore pipe H, and is driven into the seabed by the underwater casting boat 12.

FIG. 1 is a plan view of a submerged casting boat, FIG. 2 is a front view of the submerged casting boat in a state where landfills are submerged, and FIG.
4 is a front view of the underwater casting device, FIG. 4 is a plan view of the underwater casting device, and FIG. As shown in FIG. 1, the submerged casting boat 12 includes a hull 20 and a hull 2
0, a cyclone 22 that separates air from the landfill material that is pressure-fed through the marine pipeline H, a mud storage tank 24 that stores the landfill material from which the air has been separated, and a mud storage tank 24 that supplies air. And an oscillating drive means 28 for oscillating the underwater casting device 26 up and down. The hull 20 is formed in a rectangular shape in plan view having a length in the front-rear direction larger than the width in the left-right direction.
Reference numeral 2002 denotes a ship winch that winds and unwinds the anchor rope R, 2004 denotes an operation room, and 2006 denotes a control room.

The underwater casting device 26 is disposed on the side of the hull 20 located at the left and right ends of the hull 20. The underwater casting device 26 includes a tube 30 having a long length corresponding to the front-rear length of the hull 20, a hopper 32 provided at one end of the tube 30, into which a landfill material is charged, and an inside of the tube 30. A screw blade 34 that is disposed rotatably and pushes the inside of the tube 30 in a state in which the landfill material is in close contact by rotating,
The driving unit 36 is provided at one end of the tube 30 and drives the screw blade 34 to rotate. The underwater driving tool 50 is provided at the other end (tip or lower end) of the tube 30.

The tubular body 30 has a tubular body 3002 that extends linearly and is swingably supported by the hull 20 as described later, and a bent portion 30 at the tip of the tubular body 3002.
When the tube main body 3002 is oriented horizontally, the tube body 3002 extends obliquely downward and linearly from the bent portion 3002. The tubular body 30 has a long length corresponding to the longitudinal length of the hull 20, and is disposed with its length direction facing the longitudinal direction of the hull 20. In this case, the length of the tube 30 may be longer or shorter than the front-rear length of the hull 20,
Alternatively, the length may be substantially the same, but in short, the length of the tube 30 is sufficiently long as compared with the front-rear length of the hull 20. In this embodiment, two pipes 30 are provided side by side so as to extend in parallel with each other, and screw blades 34 are provided on each pipe 30, and the screw is extended to the tip of each pipe body 3002. The blade 34 extends.

The two pipes 30 (the pipe body 300)
The hopper 32 is provided on the upper surface of one end of 2). The hopper 32 is a single unit, and a landfill material is put into the hopper 32 from the mud storage tank 24, and a landfill material is put into the two pipes 30 from the hopper 32. In the present embodiment,
As shown in FIG. 3, a stirrer 3202 is provided at the bottom of the hopper 32 so that the landfill material is uniformly charged into the tube 30 from the hopper 32. In addition, regardless of the inclination of the pipe 30 (the pipe main body 3002), the landfill material is smoothly fed into the hopper 32 from the mud storage tank 24,
The opening 3204 of the hopper 32 is formed long before and after, and the input port 2402 of the mud storage tank 24 faces the center of the opening 3204.

A frame member 40 is provided on the lower surface of one end of the two tubes 30 (tube body 3002) so as to extend on the extension of the tube 30 (tube body 3002). The frame member 40 is supported by the hull 20 via a bracket 2010 fixed to the hull 20, a bracket 2010 and a pin 2012 inserted through the frame member 40,
The pin 2012 is located near the front of the hull 20. Thereby, the pipe 30 (the pipe body 3002) is fixed to the pin 201 so that the hopper 32 is always positioned on the water surface.
The hull 20 is swingably supported at a position near the front of the hull 20 with the fulcrum 2 as a fulcrum. The driving unit 36 is constituted by a hydraulic or electric motor,
One is provided. An upper end of each screw blade 34 is connected to a motor, and each motor is disposed on the frame member 40 so as to be movable along the longitudinal direction of the tube 30. At the end of the frame member 40, two hydraulic cylinders 42 are provided, and the piston rod of each hydraulic cylinder 42 is connected to a corresponding motor. It is configured to slide along the extending direction of the body 30 (the tube body 3002). By sliding the screw blades 34 with respect to the tube 30 (tube body 3002) in this manner, it becomes very convenient at the time of maintenance for removing clogging and the like.

The swing drive means 28 includes a winch 2802 disposed on the hull 20, a wire 2804 wound around the winch 2802, and a wire guide 2806 provided at the rear edge of the hull 20 in the width direction. And The end of the wire 2804 pulled out from the winch 2802 is passed through the wire guide 2806 to the tube 30 (the tube body 3).
002), and is connected to the leading end of the
Is driven so that the underwater casting device 26 swings up and down with the pin 2012 as a fulcrum. Then, the wire guide 2806 is lifted so that the pipe 30 (the pipe main body 3002) is horizontally lifted on the side of the hull 20.
Is a support 2806A having a predetermined height and a support 2806A.
Pulley 28 disposed at the upper end of A for guiding wire 2804
06B.

The underwater tool 50 is shown in FIG.
As shown in (B), a rectifying member 52 and a tubular member 54 are provided. The straightening member 52 is connected to the tube tip 3006.
It is attached to the tube tip 3006 via a plurality of rods 56 so as to face below the tip (lower end) 3010 of the tube. Then, the rectifying member 52 is connected to the distal end 3 of the tube tip 3006.
The surface facing 010 is a conical surface whose center protrudes toward the distal end 3010 so that the landfill material can be directed radially outward of the tube tip portion 3006 against the landfill material flowing out from the distal end 3010. Is formed.

The tubular member 54 is made of steel, is formed in a horizontally long elliptical shape so as to surround the outside of the distal end 3010 of the two tube tip portions 3006, and the upper and lower portions are open. The tubular member 54 has an upper end positioned higher than a lower end 3010 of the tube tip 3006 and a lower end positioned at the lower end of the tube tip 3006 in a state where the tube tip 3006 faces downward in the vertical direction. Both sides are attached to the tube 30 by three elongated members 58 which are flexible to each tube tip 3006 so as to be positioned lower than 3010. Note that a chain or a wire can be used as such a flexible elongated member 58. In the present embodiment, the tube tip 300
6 is disposed such that the lower end 3010 is located substantially at the center of the height of the tubular member 54.

Next, the case where the landfill material is cast on the seabed by the underwater casting boat 12 will be described. In the submersible casting boat 12, the winch 2 is arranged such that the lower end of the tubular member 54 provided at the lower end of the pipe 30 is attached to (subject to) the seabed B.
802, the swing angle of the tube 30 via the wire 2804,
That is, the swing angle of the underwater casting device 26 is adjusted. Then, when the lower end of the tubular member 54 is attached to the seabed B, the lower end of the tubular member 54 sinks into the floating mud deposited on the seabed B, and the opening at the lower end of the tubular member 54 is closed.

The landfill material is supplied from the solidification vessel 14 to the cyclone 22 of the submerged casting vessel 12 via the offshore pipe H,
After the air is separated by the cyclone 22, the landfill material is stored in the mud storage tank 24, supplied to the hopper 32 from the mud storage tank 24, and supplied to the screw blade 34 via the stirrer 3202. The separated air is safely discharged through the air discharge pipe J. Then, the screw blades 34 are rotationally driven by the driving unit 36, and although the seawater is filled in the inside of the tube 30, the landfill material is pushed forward in a state where the inside of the tube 30 is in close contact with the screw blades 34, It is extruded from the tip 3010 of the tubular body 30 into seawater inside the tubular member 54. In this case, the landfill material is the pipe 3
0 can be pushed in close contact with the inside.
Before reaching 010, the dredged soil and solidified material are not separated inside the pipe 30.

As shown in FIG. 7, the lower end 3
The landfill material extruded from 010 collides with the rectifying member 52, changes its direction to the inner surface of the tubular member 54, and collides with the inner surface of the tubular member 54. As a result, the front moat is prevented, and the momentum (flow velocity) of the landfill material pushed out from the lower end 3010 of the tubular body 30 is attenuated inside the tubular member 54, and the opening at the lower end of the tubular member 54 is closed. As a result, the landfill material is filled inside the tubular member 54 from below to above. Then, the landfill material rises in the annular space formed by the outer peripheral surface of the tube tip portion 3006 and the inner peripheral surface of the tubular member 54, and from the upper end of the tubular member 54 to the outside of the tubular member 54, The reclamation material whose momentum (flow velocity) has been attenuated overflows, and the reclamation material whose momentum (flow velocity) has been attenuated successively spreads on the seabed B at the top of the tubular member 54 as if it spreads. The landfill material is cast on the seabed B around the shaped member 54.

Therefore, even if a large amount of earth and sand is poured in a short time, disturbance of the floating mud on the seabed B and the surrounding landfill material due to the momentum of the landfill material flowing out of the pipe 30 is suppressed. You. Further, even if the vibration of the pipe 30 (the pipe tip 3006) increases, the vibration is attenuated by the tubular member 54, so that the vibration disturbs the floating mud on the seabed B and the surrounding landfill material. Is suppressed. Accordingly, a large amount of landfill material can be reliably and quickly poured into a limited location around the tubular member 54 without causing water pollution.

By swinging the tube 30 by the swing driving means 28, the depth (height from the seabed) of the distal end portion 3006 of the tube 30 and the tubular member 54 can be changed. It can easily respond to changes in water depth, such as when the tide is high. Further, the pipe 30 is disposed with its length direction facing the front-rear direction of the hull 20, and one end of the pipe 30 can swing up and down via a pin 2012 at a portion near the front of the hull 20. Since the wire guide 2806 that supports and receives the load of the wire 2804 connected to the other end of the pipe 30 is disposed at the rear of the hull 20, the weight of the long and heavy underwater casting device 26 is increased. 2 can be received at the entire front and rear portions of the hull 20, and as shown in FIG. 2, the stability of the hull 20 during the casting operation can be enhanced, and as shown in FIG. This is extremely advantageous in improving the running stability of the hull 20 when moving as a state.

Once a desired amount of landfill material has been cast around the cylindrical member 54, the pipe 30
The transfer of the landfill material in the inside is stopped, the pipe 30 is swung upward, the tubular member 54 is separated from the seabed, the hull 20 is moved to the next casting point, and the landfill material is removed in the same manner as described above. I will cast it. In this case, the hull 20 is moved, for example, when the hull 20 is moved forward, the anchor rope R is fed out at the ship sending winch 2002 arranged at the rear of the hull 20, and the hull 20 is arranged at the front of the hull 20. This is performed by winding up the anchor rope R in the ship sending winch 2002. Since the lower end of the tubular member 54 is open, when the pipe 30 is swung upward, the landfill material does not remain inside the tubular member 54, and The load of the remaining landfill does not affect the tube 30.

Although the embodiment has been described with respect to the case where the underwater casting device 26 is disposed on the side of the hull 20 in the width direction, the hull is divided in the width direction at a portion other than the front end or the rear end of the hull. However, it is also possible to dispose an underwater casting device between these divided hulls. Further, in the embodiment, the case where the number of the tubes 30 is two has been described, but the number of the tubes 30 may be one, or may be three or more.
When the number of the pipes 30 is one, as shown in FIGS. 8A and 8B, the tubular member 54 has a circular shape when viewed in a plan view.
The tube tip 3006 is located at the center of the tubular member 54. Further, as shown in FIGS. 9A and 9B, a wall portion 60 protruding from the upper end of the tubular member 54 and extending in the circumferential direction of the tubular member 54 is provided, and the cylindrical portion 60 extending in the circumferential direction is provided. Member 5
If the height of the portion 4 is made higher than the other portions, the cylindrical member 54 can be placed from the upper end of the cylindrical member 54 when the landfill material is cast.
The direction in which the reclaimed material whose momentum is attenuated overflows can be directed to a specific direction, which is advantageous when the reclaimed material is cast only in a limited narrow place.

[0022]

As is apparent from the above description, according to the underwater casting method, the underwater casting tool and the underwater casting boat of the present invention, the quality of the landfill material can be ensured, and water pollution can be suppressed. A large amount of landfill material can be reliably poured in while.

[Brief description of the drawings]

FIG. 1 is a plan view of an underwater casting boat.

FIG. 2 is a front view of a submerged casting boat in a state where a landfill material is submerged.

FIG. 3 is a front view of the underwater casting device.

FIG. 4 is a plan view of the underwater casting device.

FIG. 5 is a front view of the underwater casting boat during movement.

FIG. 6A is a sectional front view of an underwater casting tool, and FIG. 6B is a plan view of the same.

FIG. 7 is an explanatory diagram when a landfill material is cast using an underwater casting tool.

FIG. 8A is a cross-sectional front view of an underwater casting tool according to another embodiment, and FIG. 8B is a plan view of the same.

FIG. 9A is a cross-sectional front view of an underwater casting tool according to another embodiment, and FIG. 9B is a plan view of the same.

FIG. 10 is an explanatory diagram of a positional relationship among a submerged casting ship, a solidification treatment ship, a solidification material plant ship, and a soil carrier ship.

[Explanation of symbols]

 Reference Signs List 12 underwater casting boat 20 hull 26 underwater casting device 30 pipe 50 underwater casting tool 52 straightening member 54 tubular member

 ──────────────────────────────────────────────────続 き Continuation of the front page (71) Applicant 000177416 Sanwa Kikai Co., Ltd. 2-4-9, Nihonbashi Kayabacho, Chuo-ku, Tokyo (71) Applicant 591182433 Fuji Marine Industries Co., Ltd. 5377 Aioi, Aioi-shi, Hyogo 8 (72) Inventor Kyoichi Nagase 4-25-2 Sendagaya, Shibuya-ku, Tokyo Inside Fujita Co., Ltd. (72) Inventor Atsushi Kayata 4-25-2 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd. (72 Inventor Toshihisa Hatano 4-25-2 Sendagaya, Shibuya-ku, Tokyo Inside Fujita Co., Ltd. (72) Inventor Michio Goto 4-2-25-2 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd. (72) Inventor Sakamoto Hiroyuki 4-25-2 Sendagaya, Shibuya-ku, Tokyo Inside Fujita Co., Ltd. (72) Inventor Yasutaka Nakai 4-25-2 Sendagaya, Shibuya-ku, Tokyo Inside Fujita Limited (72) Inventor Takafumi Kishiguchi 4-25-2 Sendagaya, Shibuya-ku, Tokyo, Japan Incorporated Fujita (72) Inventor Hidehiro Sugi 4-25-2 Sendagaya, Shibuya-ku, Tokyo Fujita, Ltd. (72) Inventor Yoshiro Omori 4-25-2 Sendagaya, Shibuya-ku, Tokyo Inside Fujita Co., Ltd. (72) Inventor Tadashi Torai 4-25-2 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd. (72) Inventor Tadashi Kikuchi 4-25-2 Sendagaya, Shibuya-ku, Tokyo Inside Fujita Co., Ltd. (72) Inventor Tsuneo Nasu 4-25-2 Sendagaya 4-chome, Shibuya-ku Tokyo Tokyo F-term (reference) 2D045 AA04 BA01 CA01 CA12

Claims (16)

[Claims] 1. An upper part of a pipe is located on a water surface, a lower end of the pipe is made to face a water bottom, a landfill material is supplied to the pipe body on the water surface, and a landfill material is supplied from the lower end. An underwater pouring method for pouring a landfill material onto a water bottom by flowing out, wherein at the lower end of the tubular body, the upper end is located above and below the distal end of the tubular body, and the upper end is open vertically. A tubular member that is located below the lower end of the tubular body and surrounds the periphery of the lower end portion of the tubular body is disposed, facing the lower end of the tubular body, and facing the landfill material flowing out from the lower end. Providing a rectifying member for directing the flow of the abutting landfill material to the inner surface of the cylindrical member, attaching a lower end of the cylindrical member on the water bottom, and rectifying the landfill material flowing out from the lower end of the tubular body. To abut against the inner surface of the tubular member, and attenuate the flow of the landfill material inside the tubular member. Filling the landfill material into the inside of the cylindrical member, overflowing the landfill material with the reduced momentum from the upper end of the annular space formed by the outer peripheral surface of the tubular body and the inner peripheral surface of the cylindrical member. An underwater casting method characterized in that the landfill material is placed on the bottom of the water so as to be discharged. 2. The transfer of the landfill material inside the tubular body is performed by rotating a screw blade disposed substantially over the entire length of the tubular body inside the tubular body and bringing the landfill material into close contact therewith. The underwater casting method according to claim 1, wherein the method is performed by pushing the inside of the pipe. 3. The pipe body is supported by a hull so that the upper part thereof can swing up and down, and the casting of the landfill material swings the pipe body up and down in response to a change in the depth of the water bottom. The underwater casting method according to claim 1, wherein the method is carried out by moving. 4. A plurality of said pipes are provided, said rectifying members are respectively disposed so as to face below lower ends of said respective pipes, and said tubular member is a single tubular member. The underwater casting method according to any one of claims 1 to 3, wherein the underwater casting method is provided so as to surround the periphery of the lower end portion. 5. The underwater casting method according to claim 1, wherein the landfill material is obtained by adding a cement-based solidifying material to dredged soil. 6. An underwater casting tool for discharging a landfill material onto a water bottom from a lower end of a tubular body and casting the landfill material on the water bottom, wherein the underwater casting tool has a straightening member and a cylindrical shape. The rectifying member is provided such that the rectifying member faces the lower end of the tubular body and strikes the buried material flowing out from the lower end to direct the buried material radially outward of the tubular body. The cylindrical member is vertically open, and the upper end is located higher than the lower end of the tubular body, and the lower end is located below the lower end of the tubular body. An underwater casting tool for landfill material, which is attached to the tube so as to surround the rectifying member. 7. The underwater filling tool for a landfill material according to claim 6, wherein the tubular member is attached to the tube by a plurality of elongated members that are flexible. 8. The underwater reclaiming material according to claim 6, wherein a lower end of the tubular body is located substantially at the center of the height of the tubular member or below the center. Casting tools. 9. A plurality of said pipes are provided, said rectifying members are respectively disposed so as to face below lower ends of said respective pipes, and said tubular member is a single piece of said plurality of pipes. The underwater casting tool according to any one of claims 6 to 8, wherein the tool is disposed so as to surround a periphery of a lower end portion. 10. The landfill according to claim 6, wherein an upper end portion of the cylindrical member extending in a circumferential direction is formed higher than other upper end portions. Underwater casting tool. 11. A hull having a length in the front-rear direction, and a submersible casting device provided on the hull, wherein the submersible casting device extends linearly and corresponds to the longitudinal length of the hull. A pipe body having a long length, a hopper provided at one end of the pipe body, into which a landfill material is charged, and a landfill material that is rotatably disposed and rotated inside the pipe body and closely adhered to the landfill material. A screw blade that pushes the pipe in the state,
It is composed of a driving unit that rotationally drives the screw blades, and an underwater driving tool provided at the other end of the tubular body, wherein the tubular body is disposed with its length direction facing the front-rear direction of the hull. In addition, the one end side is vertically swingably coupled to a portion closer to the front or rear of the hull, and a rocking drive unit for vertically rocking the tube is provided. And a tubular member, wherein the rectifying member faces below a lower end of the tubular body and strikes a reclamation material flowing out from the lower end so as to direct the filling material radially outward of the tubular body. The tubular member is attached to the tubular body, and the tubular member is vertically open and has an upper end located higher than the other end of the tubular body and a lower end located below the other end of the tubular body. Attached to the tube so as to surround the other end of the body and the rectifying member. Water hitting the 設船. 12. A submerged casting device, comprising: a hull having a length in the front-rear direction; a submerged driving device provided on the hull; and a rocking drive unit for vertically pivoting the submerged driving device. A pipe extending linearly and having a long length corresponding to the front-rear length of the hull, a hopper provided at one end of the pipe, into which a landfill material is charged, and a pipe inside the pipe. A screw blade that is rotatably arranged and rotates and pushes the inside of the pipe with the landfill material in close contact,
A drive unit provided at one end of the tube body for driving the screw blades to rotate; and a submerged driving tool provided at the other end of the tube body, wherein the rocking drive means is disposed on the hull. A winch on which a wire is wound, a wire guide provided on the outer edge of the hull, and a wire pulled out from the winch and having an end connected to the tube via the wire guide, The pipe body is disposed with its length direction facing the front-rear direction of the hull, and the one end side is vertically swingably coupled to one of the front and rear parts of the hull, The part is provided on the other of the front part and the rear part of the hull, The underwater casting tool includes a rectifying member and a tubular member, and the rectifying member faces below a lower end of the tubular body and has a lower end. The landfill material into the pipe The tubular member is attached to the tubular body so as to face radially outward, and the tubular member is open vertically and has an upper end positioned higher than the other end of the tubular body and a lower end positioned at the other end of the tubular body. An underwater casting boat, which is attached to the pipe so as to be positioned lower than the other end of the pipe and to surround the rectifying member. 13. The tube body extending linearly and swingably coupled to the hull, and connected to an end of the tube body via a bent portion. The underwater casting boat according to claim 11 or 12, wherein the underwater casting boat is constituted by a pipe body which extends obliquely with respect to the main body and constitutes the other end of the pipe body. 14. The method according to claim 11, wherein the connection of the tube to the hull is performed by rotatably supporting the tube with a pin supported on the hull side. The submersible casting vessel according to any one of the preceding claims. 15. The driving unit includes a motor connected to an upper end of a screw blade, wherein the screw blade and the motor are slidably disposed along an extending direction of the tube, and the driving unit is mounted on the frame member. The submersible casting boat according to any one of claims 11 to 14, further comprising a hydraulic cylinder that slides a motor and a screw blade along an extending direction of the tubular body. 16. The submersible casting boat according to claim 11, wherein the hopper has an opening for charging a landfill material which is long in a longitudinal direction of the hull.