JP3365647B2 - Sand cover box and landfill method using the cover sand box - Google Patents

Description

Detailed Description of the Invention

[0001]

[Field of Industrial Application] The present invention is applicable to the case where the sea is used as a place for treating fish and shellfish sludge and fish and shellfish dung or for treating municipal waste or industrial waste when cultivating fish and shellfish in the sea. The present invention relates to a sand cover device that can be treated with sand cover for treating them without pollution and a landfill construction method for a sea area using the sand cover device.

[0002]

2. Description of the Related Art Conventionally, when fish and shellfish are cultivated in the sea, since the fish and shellfish dregs and the fish and shellfish dung are not treated as they are, they accumulate on the sea floor and pollute the sea. Moreover, in Japan, the places where industrial wastes and municipal wastes are dumped have gradually decreased, and even if they are dumped into the sea, the problem of leaked sewage and the huge amount of money required for revetment work.

[0003]

[Problems to be Solved by the Invention] The present invention has a problem of protecting the sea from pollution because fish bait debris and fish and shellfish dung accumulate on the seabed when aquaculture is performed in the sea. There is a problem of where to dispose of municipal and industrial waste. Many of the waters near Japan, such as the Seto Inland Sea, are too deep to reach the sun's rays, and there are many areas with extremely large depths where natural breeding of fish and shellfish does not grow. To do. The present invention prevents the pollution of the seabed of the cultivated and fishery land, and further uses the inner bay and the inner sea to reclaim the waste,
The purpose is to cover the surface with sand to a considerable thickness to create shallow water, and to treat the above-mentioned seabed contaminants and land waste and activate the sea area. However, the wastes in this case are limited to those that do not contain harmful substances.

[0004]

The first object of the present invention is to provide steel columns that can be buried in the seabed at the four corners so that iron boxes can be moved up and down freely by a lifting device provided on the steel columns. The box is provided with a floor on the bottom that can be opened and closed horizontally in one direction of the box or in the front-back direction of the box.
A buoyancy adjusting air tank is provided on a side surface, and the framework at the bottom of the box is a sand-covered box characterized by being constituted by a framework of a thick iron plate that can support sand when the box contains sand. The second is the sand-covering box according to the first aspect of the present invention, which is provided with floors that can be opened and closed horizontally in the front-rear direction and the left and right side surfaces of the sand-covering box above and below the lower frame on the four sides of the box. The third is that steel columns for preventing the flow of waste and sand cover are erected at regular intervals at the boundary line around the sea area, and between the steel columns to the surface of the sand cover of the columns. A sheet-like protector for preventing the outflow of polluted water or polluted water from the waste is stretched under the sheet-like protector. The movable cover sand box according to claim 1 or 2 is supported at the four corners within the boundary line of the sea area where the concrete plate is stretched. The waste or sand covered by the sand cover box is dumped in the sea area by horizontally opening the bottom surface of the cover box, and the entire sea area is sequentially treated as waste or cover sand. The method of land reclamation in sea areas using a sand cover box, which is characterized by covering the sand with a thickness of 1.5 m or more on the waste layer. It is about.

The steel columns at the four corners of the cubic sand cover of the present invention may be steel pipes, which can be slid up and down by hydraulic pressure. The thick iron plate on the four sides of the bottom is about 0.2 to 2 m depending on the scale of the sand cover box. The sand cover box is preferably a square with sides of 6 to 12 m, and a cube with a height of about 10 m that moves up and down. The cube cover sand box is hydraulically moved up and down by hydraulically using the support steel pipe columns at its four corners as support shafts. It operates vertically and the lower tip of the column is buried in the seabed as shown in 1- (1) of Fig. 1.

In order to prevent the fish and shellfish bait and the fish and shellfish dung from collecting on the seabed and contaminating the seabed, the sand cover box of the present invention covers the sea to a thickness of about 1.5 to 2 m. In order to use it as a dumping place for municipal waste or industrial waste, the waste is buried in the deep water of the inner bay or inland sea as shown in FIG. The sand cover box is used, and the upper layer is covered with sand cover of 2 m or more, and the shallow water (-4 ~
It is possible to activate the sea area by constructing it to be -7 m). In this case, the revetment seawall can be constructed at low cost by mainly using the slantable pile-type steel pipe construction method that can be relocated. The protector below the column for preventing outflow of waste contaminants or polluted water installed between steel columns for preventing the flow of waste and sand cover at the boundary line around the sea area is from the sea surface to the seabed. It is preferable to use a sheet made of canvas, and a wall plate up to the water depth where the wave height reaches is a concrete plate, a steel plate or a synthetic resin plate.

[0007]

The present invention will be described below with reference to the drawings. [FIG. 1] is a perspective view of an embodiment of a sand-covering box of the present invention. The four side surfaces are made of iron, and a cubic cube box (1) is provided at the four corners of a cubic cube (1) of 10 m × 10 m × 10 m. The support shafts (2), (3), (4), (5) of the square box made of steel pipe with the vertically sliding tip driven into the seabed and the upper end protruding above the cubic box. Provided,
The four-sided bottom frame (8) of the regular cubic box is preferably made of a strong steel plate four-circle frame for containing sand. Buoyancy adjustment air tanks (6), (6 ') are provided on two sides of the cube, and the bottom of the cube is a floor that can be opened and closed horizontally by hydraulic pressure.
It is equipped with (7) and (7 '). Box of square cube (1) is the supporting axis
Install by (2), (3), (4) and (5) to slide up and down by hydraulic pressure. The shape of the box may be any cube or cylindrical shape, but a regular cube is preferably used. The air tanks (water tanks) (6) and (6 ') may be provided not only on both sides of the cubic box but also on the four sides. It is determined by the buoyancy adjustment capability of the box. 1- (2) in [Fig. 1]
The cross sections of (a) to (e) are shown. (10) is a hydraulic stalk rod, and (9) is angle steel.

[0008] [Fig. 2] is a floor surface of the lower surface that can be opened and closed horizontally.
In addition to (7), a floor surface (7 ') that can be opened and closed horizontally is provided below the left and right lower frameworks (8) made of steel plate.
The figure of one example which opened (7 ') horizontally is shown. The floor surface (7 ') provided below the left and right frameworks exerts excessive force due to the thickness of the sand inside the box when the ground on the seabed where the sand is covered is soft, and the box containing sand is below the seabed. It is provided in order to prevent the construction from getting into the ground and becoming extremely difficult to construct. Therefore, the weight of the whole box is not pressed to the seabed ground, and the effect of preventing the cover soil from slipping into the ground is achieved.

[0009] Fig. 3 shows the sand-covered box (1) of the present invention installed on the beach so that it can slide up and down by the columns (2) and (5), and the waste and sand loading ship (15). More waste in the sandbox (1)
(16) or cover sand (18) to drop the seabed (-40m) (23)
The waste (16) is deposited up to a water depth of -2 to -7 m (17) and the covering sand (laying sand) (18) is laid on it up to 2 m. In the figure, (20) hydraulic motor ship, (2
1) Hydraulic motor, (22) Subsea anchor, (19) +2 from sand cover
m Indicates a coastline.

[Fig. 4] is a plan view showing a waste landfill site. Areas A, B, C and D for dumping underwater dump waste (16) are provided in the bay between the two capes (28) and dumped. The ship (15) is at the doorway
(26) goes in and out and dumps waste into A, B, C, and D. The deepest part of the bay has a depth of -40 mm. On the A, B, C, D lines in the bay, a steel pipe as shown in [Fig. 5] is erected with a 2m pitch to form a simple revetment (25).
The simple revetment can be removed if the sand cover is completed in the areas A, B, C and D. When removed, there is an advantage that the material of the simple revetment can be diverted to the next landfill site.

FIG. 5 shows a cross-sectional view of a revetment for a waste landfill area. [Fig. 4] Steel pipes (25) and columns (29) are erected on the enclosure lines A, B, C and D with a pitch of 2 m. On the waste (16) side of the steel pipe (25), a sheet protector (33) for preventing the outflow of pollutants or contaminated water is placed below, and further a concrete plate (30) is placed above it. It is stretched over the entire length. A rectangular sheet protector stop block (34) is provided around the sand cover at a position where the steel pipe (25) contacts the seabed.

[0012]

The effects of the present invention are summarized as follows. (1) By using the sand cover box of the present invention, it is possible to remarkably easily and inexpensively cover sand in the surrounding sea area, and it is possible to provide a new disposal site for municipal waste and industrial waste. . (2) The contamination of the seabed by the bait and fish dung of the fish and shellfish of the cultivated fishery land is covered by using the sand cover box of the present invention,
It became possible to prevent easily and cheaply. (3) By attaching buoyancy tanks to both sides or four sides of the sand-covering box and adjusting the buoyancy tank and hydraulic pumps attached to the steel pipes at the four corners, the sand-covering box can be raised and lowered and rotated freely. The height can be freely selected, and there is an advantage that sand covering work can be done at any place on the beach. (4) Since the seawall is installed around the sand cover area, there is no outflow from the sand cover area or the polluted water of the waste and the polluted water during the construction. Never pollute. (5) By using the sand-covered box of the present invention, landfilling of waste and revetment work can be performed quickly and inexpensively.

[Brief description of drawings]

FIG. 1- (1) is a perspective view of an embodiment of the sand-covered box of the present invention, and FIG. 1- (2) is a sectional view taken along the line (a)-(e) of FIG. 1- (1).

FIG. 2 is a perspective view of an embodiment of a horizontally opening / closing double bottom structure of a sand cover box.

FIG. 3 is an example of the use of the sand-covered box of the present invention used for landfilling waste.

[Fig. 4] 4- (1) is a plan view of the waste landfill site in the bay, and Fig. 4- (2) is the waste dumped in the sea shown in 4- (1).
The side view of one Example at the time of covering 4 to -2 m with a sand cover layer.

FIG. 5 is a cross-sectional view of the seawall portion of the waste landfill area.

[Explanation of symbols]

1. Sand cover box 2, 3, 4, 5. Steel pipes at the four corners 6 and 6 '. The sand cover box can be slid up and down by hydraulic pressure. Air tank for buoyancy adjustment of sand cover 7. Floor surface 7 '. On the upper part of the lower frame that opens and closes in the horizontal direction before and after the sand cover box. 7. The bottom floor surface of the lower framework that opens and closes horizontally on the side of the sand-covered box. Thick iron plate bottom wall 15. Waste and sand loading vessels 16. Waste 17. 2m sand cover layer in the sea 18. Sand cover 19. Sea level 20. Hydraulic motor (engine) ship 21. Hydraulic motor 22. Submarine anchor 23. 30. Seawall steel pipes and support steel pipes provided on the seabed 25, 29.2m pitch. Concrete plate 33. Sheet protector 34. Rectangular stop block

Claims (3)

(57) [Claims] 1. An iron box is attached to four corners of a steel column that can be buried in the seabed so that it can be moved up and down freely by an elevating device provided on the steel column. Direction or the front and rear direction of the box, the bottom floor can be opened and closed horizontally, the air tanks for buoyancy adjustment are provided on two or four sides of the box, and the frame at the bottom of the box supports when sand is stored in the box. A sand-covered box, which is configured by a framework of an iron plate having a possible thickness. 2. The sand-covering box according to claim 1, wherein the front and rear and left and right lower frames of the sand-covering box have horizontally openable and closable floor surfaces above and below the frame below the box. 3. Steel columns for preventing the flow of waste and sand cover are set up at regular intervals at the boundary line around the sea area, and between the steel columns to the surface of the sand cover of the columns. A sheet-like protector for preventing the outflow of polluted water or polluted water from the waste is stretched under the sheet-like protector. The transferable cover sand box according to claim 1 or 2 is erected by a pillar so that the waste or the cover sand contained in the cover sand cover the boundary of the sea area where the wall plate is stretched. By horizontally opening the lower surface of the sand box, it is dumped in the sea area and the whole sea area is sequentially filled with waste or covered sand,
Next, a landfill method for sea areas using a sand cover box, which is characterized by covering the waste layer with a thickness of 1.5 mm or more.