JPH055025B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to a floating working section (a floating working space) when treating sludge in ports, rivers, etc. or constructing underwater observation towers and other floating structures. In addition, ensuring a stable working environment and improving the working scenery,
This technology relates to the prevention of secondary pollution caused by the noise and odor that often accompany sludge treatment, as well as the scattering of sludge.

[Conventional technology]

Taking sludge treatment as an example, dredging of sludge using grab vessels is currently being carried out in an open state. For this reason, in rivers and ports in urban areas adjacent to residential areas, factories, etc., secondary pollution is likely to occur due to noise, bad odors, and sludge scattering, and it also gives a dirty image to the work and makes it difficult to dispose of sludge. It's summery. Methods such as submerging a box with a downward opening in water and dredging out the sludge inside have been used, but this has not been a fundamental countermeasure.

Therefore, the present applicant has proposed, in Japanese Patent Application No. 59-124268, a working part covering structure that completely covers the entire floating working part during sludge treatment and the like.
As shown in FIG. 6, this structure is a steel truss structure a, and is constructed to be installed on both banks c of a river b.

[Problem that the invention seeks to solve]

The above-mentioned structure is very effective in preventing secondary pollution in sludge treatment in small and medium-sized rivers, but cannot be used when there is no ground to support the structure on both sides of the working area, such as at sea. Of course, it is not impossible to construct the above-mentioned structure so that it is placed on a float and floated on the water surface, but since the steel truss structure is heavy, a significantly larger float is required. Since vertical movement of the float due to waves cannot be avoided, designing and manufacturing truss structures is extremely difficult. In addition, since it is a temporary structure that covers the floating work area and needs to be prepared for approaching typhoons or other emergencies, it is desirable to be able to assemble and dismantle it as quickly as possible. Assembling and disassembling a vehicle requires a lot of time even on the ground, and since this is done on an unstable float, the time required for assembly and disassembly and the risk of the work are further increased.

In view of the above points, the present invention combines a membrane structure, which has been attracting a lot of attention in recent years as a large-span roof for above-ground structures, with a float, thereby making it possible to deform by following the vertical movement of the float caused by waves. Therefore, there is no risk of damage, it is easy to manufacture, it is lightweight and can be assembled and dismantled in a short time, and it can be used extremely effectively to prevent secondary pollution caused by sludge treatment. The purpose of the present invention is to provide a membrane structure for.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides floats arranged opposite to each other on both sides of a floating working section, and a plurality of air beams formed in an arch shape and parallel to each other between both floats. The membrane structure for covering the floating working area was constructed by connecting the semi-cylindrical roof made of a flexible sheet supported by the membrane structure.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

The drawing shows a membrane structure for covering a floating working part according to the present invention. 1... are floats arranged parallel to each other opposite to each other on both sides of the above-water working section W, 2 is a connecting float arranged between one end of the float 1..., these floats 1... and the connecting float 2. This constitutes a barge A that is approximately U-shaped in plan view. The U-shaped opening on the opposite side of the connecting float 2 is configured as an entrance/exit of a work boat such as a grab boat 3 or a barge boat 4. The floats 1 and the connecting floats 2 are constructed by, for example, connecting a required number of steel box-shaped float units manufactured to a certain size. The connection between the float units and the connection between the floats 1 on both sides and the connection float 2 may be rigidly performed by welding, etc. They may be pivotally connected so as to be relatively swingable around the core.

Both floats 1... have a semi-cylindrical roof made of a flexible sheet 7 supported by a plurality of air beams B... formed in an arch shape and closely parallel to each other between both floats 1... C is connected.

Each of the air beams B is connected to an air compressor D.
It is constituted by an arch-shaped air tube 6 having a connection part 5 to the air tube 6, and is housed in a cylindrical part 7a formed in the flexible sheet 7. Both ends of each cylindrical portion 7a are fixed to the floats 1 by means such as bolt tightening, but the air tubes 6 inside are not directly fixed to the floats 1. This is designed to prevent force from being concentrated on a part of the air tube 6 and damaging it due to the vertical movement of the float 1 due to waves. The air compressor D is mounted on another float 1a connected to the float 1, and each air beam B
The pressure inside each air beam B is kept constant by automatically controlling the magnetic valve V installed in the connection part 5 based on the detection result of the pressure detector P provided in each air beam B. .

In this embodiment, a large number of air beams B are arranged closely together, but the air beams B may be formed at appropriate intervals in the longitudinal direction of the float 1. In addition, the flexible sheet 7 is provided with a cylindrical portion 7.
Instead of forming the semi-cylindrical roof C, another sheet may be placed outside or inside the air beams B to form the semi-cylindrical roof C.

Curtains 8 made of flexible sheets are attached to both ends of the semi-cylindrical roof C on the gable side. At least the curtain 8 on the work boat entrance/exit side
is configured to be openable and closable. When constructing the curtain 8 so that it can be freely opened and closed, for example, the curtain 8 is divided into left and right parts, the edges of each divided curtain are overlapped, and a magnet such as a rubber magnet attached to this overlapped part is used to close the curtain 8. Various specific structures can be adopted, such as maintaining the width of the curtain and lifting the edges of each divided curtain inward and outward with wires to open only the required area.

E is an exhaust facility equipped with a deodorizer, and is mounted on another float 1b connected to the float 1. The flexible duct 9 led indoors from the exhaust equipment E through the semi-cylindrical roof C is suspended from the air beam B with a wire, and is configured so that the hood 9a at the tip of the duct can be moved to any position. There is. It is configured so that local ventilation and deodorization can be performed at a desired position of the floating working section W, for example, a position directly above the barge 4. 10
is a wire stretched between the ends of the floats 1 on the work boat entrance/exit side, one end of which is fixed to one float 1, and the other end is a wire that is fixed to the winding drum fixed on the other float 1. 11, and serves to maintain a constant distance between the floats 1 which are pushed outward by the air beams B. When the work boat enters or leaves the wire 10, the drum 11 is rewound and the middle part of the wire 10 is suspended into the water, or it is pulled upward with another wire so that it does not become an obstacle to the passage of the work boat. It is intended to do so. 10a...
is a weight slidably attached to the wire 10. 12... is an anchor that fixes the above-mentioned membrane structure.

Next, an example of the procedure for assembling the membrane structure will be described.

First, the floats 1 and the connecting floats 2 are connected to assemble the barge A, and both ends of the cylindrical portion 7a in which the air tubes 6 are housed are fixed at predetermined positions on the upper part of the barge A.

In this state, the barge A is towed to the floating work section W and fixed at a predetermined position with anchors 12.

After that, install the curtain 8... and
The air tube 6 is compressed by the air compressor D.
... is filled with air to form air beam B....

Next, auxiliary equipment such as exhaust equipment E and flexible duct 8 are installed, and grab vessel 3 and barge vessel 4 are installed.
Then, the sludge treatment process will begin.

The air tube 6 and flexible sheet 7 may be appropriately selected from synthetic fiber cloth such as canvas, nylon, Tetron, or vinylon coated with vinyl chloride or hypalon rubber, or glass fiber cloth coated with Teflon. It can be used as

FIG. 5 shows another embodiment of the invention. In this embodiment, instead of the wire 10 for maintaining the distance between the floats 1, a steel rod member 13 that can resist reduction in the distance between the floats 1 is used. To explain in more detail, float 1...
Connect another float 1c... to the inside of the front end of
The opening width of the work boat entrance is made as narrow as possible, one end of the rod-shaped member 13 is rotatably attached to one float 1c, and the other end of the rod-shaped member 13 is configured to be able to be connected to and detached from the other float 1c. Except when the floats 1c go in and out, the rod-shaped member 13 holds both floats 1c.
... are connected to maintain a constant spacing.

Although not shown, the connecting float 2 may be omitted and the left and right floats 1 may constitute a membrane structure in which the left and right floats 1 are connected by a semi-cylindrical roof C, a wire 10, a rod-shaped member 13, etc. In addition, when constructing a floating structure such as an underwater observation tower, the curtain 8 is omitted because there is no problem of bad odor or sludge scattering.
It can simply be used as a membrane structure for covering a floating work area to avoid wind and rain and provide a stable working environment.

〔effect〕

The present invention has the above-mentioned configuration, and is supported by floats arranged opposite to each other on both sides of the above-water working section, and a plurality of air beams formed in an arch shape and parallel to each other between both floats. Since the structure for covering the floating working area is constructed by connecting a semi-cylindrical roof made of a flexible sheet, the semi-cylindrical roof elastically deforms following the vertical movement of the float due to waves, and there is no risk of damage. It has the following advantages: it is easy to manufacture, it is lightweight and can be used as a small float, and it can be assembled and dismantled in a short time, making it ideal for covering temporary floating work areas.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention,
FIG. 1 is a perspective view, FIG. 2 is a front view, FIG. 3 is a plan view, and FIG. 4 is a sectional view of the main part. FIG. 5 is a perspective view of essential parts showing another embodiment of the present invention. FIG. 6 is a front view showing a conventional example. 1...Float, 5...Connection part, 6...Air tube, 7...Flexible sheet, 7a...Cylinder part, A
...Barge, B...Air beam, C...Semi-cylindrical roof, D...Air compressor.

Claims (1)

[Scope of Claims] 1. Flexibility supported by floats arranged opposite to each other on both sides of the above-water working part and a plurality of air beams formed in an arch shape and parallel to each other between both floats. A structure for covering an above-water working area, which is connected to a semi-cylindrical roof made of sheets. 2. Claims characterized in that the air beam is constituted by an arch-shaped air tube having a connection part to an air compressor, and is housed in a cylindrical part formed in the flexible sheet. The membrane structure for covering an above-water working part according to item 1.