JP7537743B2 - Work platform for land-water interface and installation method - Google Patents

Description

The present invention relates to a work barge for use at the land-water boundary and an installation method.

Floating work platforms are widely used to carry out stable foundation civil engineering works in bodies of water, such as the ocean, rivers, or dams. Floating work platforms are constructed using the so-called block construction method, in which platforms called floaters manufactured in factories or other locations are connected at the work site.

The floating work barge described in Patent Document 1 is constructed by connecting multiple floaters on the water, erecting the legs on the seabed or riverbed, etc., and lifting the work barge above the water surface using a lifting device.

Japanese Patent Application Publication No. 10-280375

Since such floating work platforms are assembled on the water, and then the legs are erected on the seabed while floating on the water, and then lifted vertically, they have traditionally only been constructed in water. On the other hand, when constructing a work site that straddles land and water, it is common to build a work platform whose main structure is H-shaped steel and steel plates. However, this method takes a long time to build.

The objective of the present invention is to provide a work barge for use in water-land boundaries and an installation method that allows for the simple and efficient construction of a work platform spanning land and water.

The present invention provides a method for installing a work barge for use in a land-land boundary, the work platform of which straddles land and water areas and which has a land barge located on the land area and a water barge located in the water area, the method comprising assembling the land barge on the land portion, assembling the water barge on the water portion, assembling a first leg and a first lifting device for raising and lowering the first leg on the water barge, moving the water barge to the front of the land barge across the land-land boundary, raising the water barge to the height of the land barge using the first leg and the first lifting device, moving the land barge towards the water barge, and connecting the land barge and the water barge.

According to the present invention, work barges can be constructed easily and efficiently across land and water areas, shortening the construction period and increasing the efficiency of work. In addition, land-use barges and water-use barges can be constructed in parallel on land and water areas, further shortening the construction period and increasing the efficiency of work.

The method may further include assembling a second leg and a second lifting device for raising and lowering the second leg to the water barge, and may raise the water barge to the height of the land barge using the first leg, the first lifting device, the second leg, and the second lifting device.

By using the second leg and the second lifting device, the stability of the water barge can be improved. The second leg improves the stability of the water barge against, for example, tipping over. Furthermore, if the second leg is configured to have a load capacity sufficient to support the weight of the water barge itself, the second leg can be made smaller than the first leg. In this case, the second leg can be easily installed and removed. Since the second lifting device only needs to be able to raise and lower the small second leg, a ready-made product such as a power casing jack can be used.

The method may further include removing the second leg and the second lifting device from the water barge after the land barge and the water barge are connected.

By removing the second leg and the second lifting device, a large working space can be secured on the water barge. The second leg and the second lifting device contribute to improving stability when lifting the water barge. However, on the other hand, after the water barge is connected to the land barge, the work barge is stably supported by the first leg of the water barge and the land barge. Therefore, after the land barge and the water barge are connected, the second leg and the second lifting device are no longer necessary and can be removed.

The method further includes connecting a connecting barge to the side of the water barge facing the land barge after the water barge is raised from the water surface, and the connection of the land barge to the water barge may be via the connecting barge.

When connecting a land barge to a water barge, there is a limit to the distance the land barge can move, in other words, the distance the land barge can extend into the water, from the standpoint of the stability of the land barge. Therefore, the water barge needs to be brought within the range of the land barge's movement. However, if the water barge cannot approach within the range of the land barge's movement due to the shape of the land-land boundary, etc., the land barge and the water barge cannot be directly connected. However, by using a connecting barge, the land barge and the water barge can be indirectly connected even if the water barge cannot approach within the range of the land barge's movement.

The method may further include assembling a third leg and a third lifting device for raising and lowering the third leg to the land barge, and after connecting the water barge to the land barge, the land barge together with the water barge may be lifted above land using the first leg, the first lifting device, the third leg, and the third lifting device.

By lifting the land barge and the water barge together, the height of the work platform can be adjusted as desired, for example when work at height is required.

The present invention further provides a work barge for use in a land-land boundary area, the work platform of which straddles land and water areas, comprising a land barge supported from below on the land portion, and a water barge supported from below on the water portion and equipped with a first leg and a first lifting device for raising and lowering the first leg, the water barge being located in front of the land barge across the land-land boundary area and being raised to the height of the land barge by the first leg and the first lifting device, and the water barge and the land barge being directly or indirectly connected to each other.

With the above configuration, a work barge for land-water boundary areas can be constructed across land and water areas, with the block construction method shortening the construction period and improving work efficiency.

The land barge and the water barge may be connected via a connecting barge.

With the above-mentioned configuration, even if the water barge cannot approach within the moving distance of the land barge due to the shape of the land-water boundary, the water-water boundary work barge can be constructed across land and water.

The water barge may further include a second leg and a second lifting device for raising and lowering the second leg, and the water barge may be raised to the height of the land barge by the first leg, the first lifting device, the second leg, and the second lifting device.

With this configuration, the water barge can be raised to the height of the land barge in a stable position.

The land barge may include a third leg and a third lifting device for raising and lowering the third leg, and the land barge and the water barge may be raised above land by the first leg, the first lifting device, the third leg, and the third lifting device.

According to the above configuration, the land barge and the water barge can be lifted together, so the height of the work platform can be adjusted as desired, for example, when work at height is required.

The work barge for land-water interface and installation method of the present invention allow a work platform to be constructed easily and efficiently across land and water areas.

FIG. 1 is a perspective view of a water-land boundary work barge according to a first embodiment of the present invention. FIG. Schematic diagram of assembling the land barge and the water barge. FIG. 13 is a schematic diagram showing the assembly of the first leg and the first lifting device onto the water barge. Schematic diagram of raising the water barge to the height of the land barge. Schematic diagram of connecting a land barge and a water barge. FIG. 11 is a perspective view of a water-land interface work barge according to a second embodiment of the present invention. Schematic diagram of assembling the second leg and the second lifting device to the surface barge. Schematic diagram of raising the water barge to the height of the land barge. Schematic diagram of connecting a land barge and a water barge. FIG. 13 is a schematic diagram showing the second leg and the second lifting device being removed from the surface barge. FIG. 11 is a perspective view of a water-land interface work barge according to a third embodiment of the present invention. Schematic diagram of raising the water barge to the height of the land barge. Schematic diagram of connecting a connecting barge to a water barge. A schematic diagram of a land barge and a water barge being connected via a connecting barge. FIG. 13 is a schematic diagram showing the second leg and the second lifting device being removed from the surface barge. FIG. 11 is a perspective view of a shore-land interface work barge according to a fourth embodiment of the present invention. Schematic diagram of assembling the third leg and the third lifting device onto the land barge. Schematic diagram of raising the land barge and the water barge.

The following describes an embodiment of the present invention with reference to the drawings. In the following description, the land-land interface work barge 1 is described as being installed across land and sea areas. In the following description, the land portion 3 refers to the portion (ground) on which the land barge 10 can be supported directly or indirectly via legs or the like. The water portion 4 refers to the portion (seabed or water surface) on which the water barge 20 can be supported directly or indirectly via legs or the like. Here, the water barge 20 being directly supported on the water surface refers to the water barge 20 floating on the water surface. The land-land interface 2 is the portion that connects the ground and the seabed.

First Embodiment
Referring to FIG. 1 , the land-shore interface work barge 1 comprises a land barge 10 and a water barge 20 .

The land barge 10 is formed by connecting a number of floaters 30 to each other to form the land portion 3, and is supported from below (the ground) on the land portion 3. The sides of the floaters 30 are provided with a number of protrusions 31 and recesses 32 that engage with the protrusions 31 as connecting means. The floaters 30 are connected by inserting the protrusions 31 into the recesses 32. There are no particular limitations on the method of connecting the floaters 30, and any well-known method may be used.

Referring to FIG. 2, the land barge 10 has a moving mechanism. The moving mechanism includes a steel plate 11 laid on the land portion 3, a hydraulic cylinder 12, and an endless roller 13. One end of the hydraulic cylinder 12 is fixed to the steel plate 11, and the other end is fixed to the side of the land barge 10 farthest from the water barge 20 so that the land barge 10 can be pushed toward the water barge 20 (in the direction of arrow L in FIG. 2). The endless roller 13 is provided on the underside of the land barge 10.

The mechanism for moving the land barge 10 is not particularly limited and may be a well-known mechanism. For example, rails may be laid instead of the endless rollers 13. Also, for example, it may be moved by lifting it with a crane.

When the land barge 10 is moved toward the water barge 20, the distance the land barge 10 can move, in other words the distance the land barge 10 can protrude toward the water, is limited from the standpoint of the stability of the land barge 10. For example, the movable distance is 30% of the length a of the land barge 10 shown in FIG. 3A.

Referring again to FIG. 1, the water barge 20, like the land barge 10, is configured with a water portion 4 by connecting multiple floaters 30 to each other. The water barge 20 also has a first leg 40 and a first lifting device 41 that raises and lowers the first leg 40. Two sets of the first legs 40 and the first lifting device 41 are each provided at the corners of the water barge 20 that are furthest from the land barge 10.

The water barge 20 is raised to the height of the land barge 10 by the first leg 40 and the first lifting device 41, and is supported from below (the seabed) in the above-water portion 4. The water barge 20 is located in front of the land barge 10, sandwiching the land-water boundary 2. The mechanism for lifting the first leg 40 by the first lifting device 41 is not particularly limited, and for example, the first lifting device 41 may raise and lower the first leg 40 using an inchworm method.

The water barge 20 and the land barge 10 are directly or indirectly connected. In this embodiment, the land barge 10 and the water barge 20 are directly connected by inserting the convex portion 31 on the side of the land barge 10 into the concave portion 32 on the side of the water barge 20.

Next, we will explain how to assemble the land-water interface work barge 1 across land and sea areas. For example, a crane is used for assembly.

Figures 3A to 3D are schematic diagrams showing the shore-land interface work barge 1 from the side to explain the installation method of the shore-land interface work barge 1 according to the present invention. In this embodiment, the land barge 10 and the water barge 20 are separated by a distance b in the direction of arrow L in Figure 3A. Here, the distance b is less than the movable distance. In other words, the water barge 20 can be brought close to within the movable distance range of the land barge 10.

The distance b differs depending on the shape of the land-water boundary 2. For example, if the land-water boundary 2 is vertical (a cliff), the distance b will be small, and if the land-water boundary 2 is a gently sloping shallow coast, the distance b will be large. The value of the distance b will also differ depending on whether the land-water boundary 2 has a downward convex curved shape or a step. In other words, the distance b is determined by the horizontal distance between the land portion 3 and the above-water portion 4, and the water depth between the land portion 3 and the above-water portion 4.

As shown in FIG. 3A, the land barge 10 is assembled in the land portion 3, and the water barge 20 is assembled (floating on the sea surface) in the water portion 4. The land barge 10 and the water barge 20 may be assembled in parallel. Next, as shown in FIG. 3B, the first leg 40 and the first lifting device 41 for raising and lowering the first leg are assembled to the water barge 20.

Then, as shown in FIG. 3C, the water barge 20 is moved to the front of the land barge 10 across the water-land boundary 2, and the water barge 20 is raised to the height of the land barge 10 using the first leg 40 and the first lifting device 41. Then, as shown in FIG. 3D, the land barge 10 is moved toward the water barge 20 (by extending the hydraulic cylinder 12), and the land barge 10 and the water barge 20 are connected. As described above, the water-land boundary work barge 1 according to this embodiment can be installed across land and sea areas.

As described above, according to the present embodiment of the work barge 1 for the land-water boundary and the installation method, the work barge can be constructed easily and efficiently across land and water areas, shortening the construction period and improving work efficiency. In addition, the land barge 10 and the water barge 20 can be constructed in parallel on land and water areas, further shortening the construction period and improving work efficiency.

Second Embodiment
4, the configuration of the land-water boundary work barge 1 according to the second embodiment of the present invention differs from that of the first embodiment in the following respects: The other configurations of this embodiment are similar to those of the first embodiment, and the same reference numerals are used to designate the same or similar elements as those of the first embodiment.

The water barge 20 according to this embodiment further includes a second leg (temporary leg) 42 and a second lifting device (temporary lifting device) 43 that raises and lowers the second leg 42. A set of the second leg 42 and the second lifting device 43 is provided in the center of the water barge 20 in the width direction (the direction of the arrow W in FIG. 4) on the land barge 10 side.

The water barge 20 is raised to the height of the land barge 10 by the first leg 40, the first lifting device 41, the second leg 42, and the second lifting device 43. Here, the second leg 42 is provided to prevent the water barge 20 from tipping over when it is lifted above the sea level (contributing to improved stability). Therefore, the second leg 42 only needs to have a load-bearing capacity sufficient to support, together with the first leg 40, the weight of the water barge 20 when it is lifted.

On the other hand, the first leg 40 needs to support not only the weight of the water barge 20 itself, but also the load of heavy machinery and the like that may be placed on the barge for revetment work and the like. Therefore, the second leg 42 may be smaller than the first leg 40. In addition, the second lifting device 43 only needs to be able to lift and lower the small second leg 42, so a ready-made product such as a power casing jack can be used.

The second leg 42 and the second lifting device 43 may be removed after the land barge 10 and the water barge 20 are connected. As mentioned above, the second leg 42 is provided to prevent the land barge 10 and the water barge 20 from tipping over, and is therefore no longer necessary after the land barge 10 and the water barge 20 are connected and the water barge 20 is stably supported by the first leg 40 and the land barge 10.

Next, using Figures 5A to 5D, we will explain how to assemble the land-land interface work barge 1 in this embodiment across land and sea areas.

As in the first embodiment, the water barge 20 is floated on the sea surface, and the first leg 40 and the first lifting device 41 are assembled to the water barge 20. Next, as shown in FIG. 5A, the second leg 42 and the second lifting device 43 for raising and lowering the second leg 42 are assembled to the water barge 20. After that, as shown in FIG. 5B, the water barge 20 is raised to the height of the land barge using the first leg 40, the first lifting device 41, the second leg 42, and the second lifting device 43.

Then, as shown in FIG. 5C, the land barge 10 and the water barge 20 are connected, as in the first embodiment. After that, as shown in FIG. 5D, the second leg 42 and the second lifting device 43 are removed from the water barge 20. As a result, the land-water boundary work barge 1 according to this embodiment can be installed across land and sea areas.

As a result, when the water barge 20 is raised to the height of the land barge 10, it can be raised and lowered in a stable posture. Furthermore, by removing the second leg 42 and the second lifting device 43 after coupling, a large working space can be secured. In addition, if the second leg 42 and the second lifting device 43 are each small, they can be easily installed and removed.

Third Embodiment
6, the configuration of the land-water boundary work barge 1 according to the third embodiment of the present invention differs from that of the second embodiment in the following respects: The other configurations of this embodiment are similar to those of the second embodiment, and the same reference numerals are used to designate the same or similar elements as those of the second embodiment.

The distance b in this embodiment (see FIG. 7A) is greater than the distance b in the first or second embodiment, and is greater than the movable distance. In other words, the water barge 20 cannot approach within the movable distance range of the land barge 10. Therefore, the land barge 10 and the water barge 20 cannot be directly connected.

The land-water boundary work barge 1 according to this embodiment further includes a connecting barge 50, and the land barge 10 and the water barge 20 are connected via the connecting barge 50. The connecting barge 50 is configured to make up for the portion of distance b that is insufficient with the movable distance alone. Specifically, the connecting barge 50 is configured so that the sum of the length of the connecting barge 50 in the direction of arrow L in Figure 6 and the movable distance is equal to or greater than distance b.

Note that any number of connecting barges 50 may be connected. For example, if distance b is long, multiple connecting barges 50 may be connected in the length direction of the land-land junction work barge 1 (arrow L direction in FIG. 6). In that case, the sum of the length of the multiple connecting barges 50 in the arrow L direction in FIG. 6 and the movable distance should be equal to or greater than distance b. Also, for example, if the land-land junction work barge 1 is long in the width direction (arrow W direction in FIG. 6), multiple connecting barges 50 may be connected in the width direction.

The connecting barge 50 has the same connecting means as the floater 30. That is, the connecting barge 50 has a convex portion 31 and a concave portion 32 like the floater 30, and the connecting barge 50 is connected to the land barge 10 and the water barge 20 by inserting the convex portion 31 into the concave portion 32.

Next, using Figures 7A to 7D, we will explain how to assemble the land-land interface work barge 1 in this embodiment across land and sea areas.

As shown in FIG. 7A, similar to the second embodiment, the water barge 20 is raised from the water surface using the first leg 40, the first lifting device 41, the second leg 42, and the second lifting device 43. Then, as shown in FIG. 7B, the connecting barge 50 is connected to the side of the water barge 20 facing the land barge 10 using, for example, a crane.

Next, as shown in FIG. 7C, the land barge 10 is moved toward the water barge 20, so that the land barge 10 is connected to the water barge 20 via the connecting barge 50. Then, as shown in FIG. 7D, the second leg 42 and the second lifting device 43 are removed, as in the second embodiment. As described above, the water-land boundary work barge 1 according to this embodiment can be installed across land and sea areas.

As a result, even if the water barge cannot approach within the moving distance of the land barge due to the shape of the water-land boundary 2, the water-land boundary work barge 1 can be constructed across land and water.

(Fourth embodiment)
8, the configuration of the land-water boundary work barge 1 according to the fourth embodiment of the present invention differs from that of the third embodiment in the following respects: The other configurations of this embodiment are similar to those of the third embodiment, and the same or similar elements as those of the third embodiment are denoted by the same reference numerals.

In the land-water boundary work barge 1 according to this embodiment, the land barge 10 further includes a third leg 44 and a third lifting device 45 for raising and lowering the third leg 44. Two sets of the third legs 44 and the third lifting devices 45 are provided at the corners of the land barge 10 that are furthest from the water barge 20. In this embodiment, the third leg 44 and the third lifting device 45 are the same as the first leg 40 and the first lifting device 41, respectively.

The land barge 10 and the water barge 20 are raised above the land (land portion 3) by the first leg 40, the first lifting device 41, the third leg 44, and the third lifting device 45.

Next, using Figures 9A and 9B, we will explain how to assemble the land-land interface work barge 1 in this embodiment across land and sea areas.

As shown in FIG. 9A, after assembling the land barge 10, in an optional process, the third leg 44 and the third lifting device 45 for raising and lowering the third leg 44 are assembled to the land barge 10. As shown in FIG. 9B, after connecting the water barge 20 and the land barge 10, the first leg 40, the first lifting device 41, the third leg 44, and the third lifting device 45 are used to lift the land barge 10 together with the water barge 20 above land. As described above, the water-land boundary work barge 1 according to this embodiment can be installed across land and sea areas.

As described above, by lifting the land barge 10 and the water barge 20 together, the height of the work platform can be adjusted as desired, for example, when work at height is required.

The work platform 1 for the land-water boundary and the installation method according to the first to fourth embodiments of the present invention allow a work platform to be constructed easily and efficiently across land and water areas.

Although specific embodiments of the present invention have been described above, the present invention is not limited to the above-described forms, and various modifications can be made within the scope of the present invention. For example, an appropriate combination of the contents of the individual embodiments and modifications can be considered as one embodiment of the present invention.

REFERENCE SIGNS LIST 1 Work barge for land-water interface 2 Land-water interface 3 Land portion 4 Water portion 10 Land barge 11 Steel plate 12 Hydraulic cylinder 13 Endless roller 20 Water barge 30 Floater 31 Convex portion 32 Concave portion 40 First leg 41 First lifting device 42 Second leg 43 Second lifting device 44 Third leg 45 Third lifting device 50 Connecting barge

Claims (9)

A method for installing a work platform for a land-water interface, the work platform straddling a land area and a water area, the work platform having a land-use barge located on the land area and a water-use barge located on the water area, comprising the steps of:
Assembling the land barge on the land portion;
Assembling the water barge in the water portion;
a first leg and a first lifting device for lifting and lowering the first leg are assembled on the water barge;
The water barge is moved to the front of the land barge across the water-land boundary;
using the first leg and the first lifting device to raise the water barge to the height of the land barge;
moving the land barge towards the water barge;
A method for installing a work barge for the land-water boundary area, which connects the land barge and the water barge. further comprising assembling a second leg and a second lifting device for lifting and lowering the second leg to the water barge;
raising the water barge to a height of the land barge using the first leg, the first lifting device, the second leg, and the second lifting device;
A method for installing the water-land interface work barge according to claim 1. and removing the second leg and the second lifting device from the water barge after the land barge and the water barge are coupled together.
A method for installing a work barge for use in a water-land interface as claimed in claim 2. The method further includes, after the water barge is raised from the water surface, connecting a connecting barge to a side of the water barge facing the land barge,
The connection of the land barge to the water barge is via the connecting barge.
A method for installing a work barge for use in a land-water boundary as claimed in any one of claims 1 to 3. further comprising assembling a third leg and a third lifting device for lifting and lowering the third leg to the land barge;
After connecting the water barge and the land barge, the first leg, the first lifting device, the third leg, and the third lifting device are used to lift the land barge together with the water barge above land.
A method for installing a work barge for use in a land-water boundary as claimed in any one of claims 1 to 4. A work platform for a land-water boundary area, the work platform of which spans land and water,
a land barge supported from below on a land portion;
a water barge supported from below in a water portion, the water barge including a first leg and a first lifting device for lifting and lowering the first leg;
the water barge is located in front of the land barge across the water-land boundary and is elevated to a height of the land barge by the first leg and the first lifting device;
A water-land interface work barge in which the water barge and the land barge are directly or indirectly connected. The land-land boundary work barge described in claim 6, wherein the land barge and the water barge are connected via a connecting barge. The water barge further includes a second leg and a second lifting device for raising and lowering the second leg,
A water-land interface work barge as described in claim 6 or 7, wherein the water barge is raised to the height of the land barge by the first leg, the first lifting device, the second leg, and the second lifting device. The land barge includes a third leg and a third lifting device that raises and lowers the third leg,
A work barge for use in a land-water boundary as described in any one of claims 6 to 8, wherein the land barge and the water barge are lifted above land by the first leg, the first lifting device, the third leg, and the third lifting device.

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