JP2588094B2 - Soft-bottom type marine structure device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soft-bottom type marine structure device which can be installed on a sea surface in combination with a ship port and various facilities.

[0002]

2. Description of the Related Art In recent years, grounds have been constructed on the sea or the like when land is scarce, land prices soar, or the like. This floating ground has a configuration in which concrete is cast on an iron plate, for example. It is a huge thing with a side of 1 km to 5 km,
It is installed temporarily or semi-permanently. The most important point here is how to install the above-ground ground on the water surface in a stable state. In this regard, conventionally, a large number of pillars are vertically provided on the lower surface of the ground, and the lower ends of the pillars are installed on the seabed, and the ground is anchored to the seabed with wires or the like in an anchor shape.

[0003]

However, as is well known, there are many undulations on the seabed, so that it is impossible to bring the lower ends of all the column bases, which are vertically suspended, into stable contact with the seabed. In order to solve this problem, it is practiced to make the bottom of the water level by the remote control of the bulltoza on the seabed to make the bottom of the water level. In addition, since it must be performed over a very wide range, the cost is high.

On the other hand, it is conceivable that the lower end of each pillar is buried and fixed on the seabed, but it is dangerous and unstable due to the influence of waves. Therefore, burying and fixing with sufficient strength to resist the force of waves requires an extremely large amount of labor and cost, and a halfway fixing tends to cause breakage. In addition, permanent fixation has a problem in that the ground on the water cannot be moved to another place. In addition, if the seabed is soft ground, the foundation cannot be used unless piles are struck to the deeper (lower) hard ground, which is an extremely large-scale construction.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above, and has a support member having a truss structure, a marine structure partially fixed or combined with the support member, and a support member as described above. And a plurality of thin column bases which are suspended from the lower surface of each of the offshore structures and partially submerged in the sea, and a buoyancy chamber capable of adjusting the amount of water inside is formed at a lower end of the above-described fine column base. By providing the bottom part in part or all, the gravity of the support member and the marine structure and the buoyancy of the bottom part are adjusted, and the bottom part is soft-bottomed on the sea floor,
The present invention relates to a soft-bottom type marine structure apparatus characterized in that a plurality of beams are used to connect each column base in the sea.

[0006]

According to the present invention, since it has the above-described structure, it can be set in a soft bottom state in which it does not move due to the flow of water such as an ocean current. In addition, since the supporting member and the offshore structure are provided with buoyancy on independent column bases, the buoyancy can be adjusted to a value that is balanced by gravity on the sea.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. The support member 1 has a truss structure, and has a side of 100
It is a huge dome shape that extends up to 500 m. On the lower surface of the support member 1, a plurality of fine column bases 2 are suspended. The above-mentioned column base 2 has a hollow portion 3 and has an elongated shape that is hardly affected by waves and the like. A part of the column base 2 is submerged in the sea, but can cope with waves and tides. It is formed as long as possible. A bottom portion 5 having a buoyancy chamber 4 is partially or entirely provided at the lower end of the column base 2. The above-mentioned buoyancy chamber 4 may be configured as a completely sealed type in which air is filled. However, the buoyancy chamber 4 of a part or all of the narrow column bases 2 is configured so that seawater can enter and drain therein. May be. In this case, a pressure sensor or the like may be provided to automatically adjust the gravity of the support member 1 and the buoyancy of the bottom portion 5. A shell concrete layer 6 is formed around the fine column base 2 to improve the water resistance of the fine column base 2. The above-mentioned shell concrete is a new technology developed in Germany in recent years.When a wire mesh is placed in the sea and a minute electric current is passed through it, calcium and other calcareous substances in the seawater will be adsorbed in a few weeks and a concrete plate Is formed.

On the other hand, the offshore structures 7a, 7b, 7c indicate various facilities, and a plurality of narrow column bases 2 are respectively provided on the lower surfaces thereof. The fine note leg 2 can be appropriately selected and installed, as in the case of the above-mentioned hanging member 2 suspended from the support member 1, of a completely sealed type or an adjustable type. In this case, the buoyancy chamber 4 is provided in the lower half of the bottom portion 5, and a water injection pump for supplying water to the upper half and a drainage pump for discharging water to the outside of the buoyancy chamber 4 are provided. Is also good. And control of these pumps is
May be performed by a controller (not shown) in the upper offshore structure 7 through the hollow portion 3 of the above. The fine column bases 2 hanging down on the lower surface of the support member 1 and the fine column bases 2 hanging down on the lower surfaces of the above-mentioned offshore structures 7a, 7b, 7c are a plurality of horizontal members in the sea. The beams 8 are connected with each other. In the illustrated embodiment, the upper surface of the marine structure 7 a is fixed to the lower surface of the support member 1. Offshore structure 7b
The upper part is fixed to the support member 1 so as to be buried.
The marine structure 7c is assembled and fixed so as to penetrate the support member 1 itself.

The conventional bottom-mounted marine structure apparatus has a large column base used, and is susceptible to tides, waves, and ocean currents. In addition, water injection control for adjusting buoyancy was required. In addition, undersea work was necessary because the bottom would not be uniform unless the seabed was flat. In addition, large-diameter column bases require internal reinforcement when the water depth becomes deep, which is economically disadvantageous. In addition, it is necessary to solidify the column bases with connecting beams, braces, or the like, and construction and maintenance are troublesome. On the other hand, in the soft-bottom type marine structure device of the present invention, the diameter of the column base is small, and the influence of tides, waves and ocean currents is small. Therefore, no buoyancy adjustment is required. Also, it is only necessary to attach buoyancy in accordance with the upper load, and it is possible to easily cope with the seabed by using an underwater concrete foundation or the like. In addition, construction and maintenance are easy because only a simple underwater tether is required. In addition, such a structure facilitates extension or replacement of columns. In addition, the degree of freedom in molding the upper structure (above the sea surface) is large. Moreover, the economy of construction can be obtained.

Further, the present invention is to use a flat plate-like may be used a support member 1 _2, or the support member 1 ₃ continuous wave shape as shown in FIG. 3 as shown in FIG. 2 May be. Note that marine structure 7 ₂ in FIG. 2 is fixed to be placed on the upper portion of the support member 1 _2, Hosohashiraashi 2 to further downward through the support member 1 ₂ which is vertically on its lower surface Hanging. Furthermore, marine structure _{7. 3} of the drawings the left side in FIG. 3 is fixed in combination as like the marine structure 7c of Figure 1 described above itself penetrates the support member 1 _3, the right side of the drawing of the marine structure 7 ₃ part of the lower part is fixed to the embedded shaped to support 1 _3.

Furthermore, the present invention may be to use a chevron-shaped support member 1 ₄ as shown in FIG. 4. Incidentally, Hosohashiraashi 2 is suspended from the lower surface of the marine structure 7 ₄ in this embodiment, the bottom landing portion 5 is formed in one integral form another thin pedestal 2. Also, in this embodiment,
An underwater breaker 9 is provided, and an anchor 10 is extended and anchored.
In this way, the effects of high waves can be reduced.

The present invention can also be applied to facilities with ports as shown in FIGS. Support 1 ₅ in this example, cross-sectional in view of the aesthetic design are constituted to have the "one" shape. And
Marine structure 7 ₅ in such facilities, a plurality as shown in FIGS. 1-4 is oblong in series instead of being provided independently, it is integrally combined with the supporting member 1 _5. Further, a part of the bottom portion 5 is formed integrally as in the case of FIG. 4 described above. As described above, the present invention can be designed in any manner without changing the technology described in the claims.

[0013]

As described above, according to the marine structure apparatus of the present invention, since the marine structure is fixed to the stable and high-strength support member both at sea and in the sea, there is no danger of tilting. It is a stable landing. In addition, by adjusting the gravity of the support member and the marine structure, respectively, and the buoyancy of the buoyancy chamber, it is possible to obtain a stable soft bottom state in which the support member and the marine structure do not move due to the flow of water such as an ocean current.
Does not require extra structural power. This reduces the number of components used, and is economically valuable. Furthermore, if the buoyancy is appropriately applied to the fine column base between the support member and the offshore structure, it can be moved in a floating state, so that the transportation from the factory to the installation site and the installation work itself can be performed extremely easily. it can. In addition, necessary space can be updated for maintenance and repair of the structure.

It is to be noted that the provision of the shell concrete layer significantly improves the water resistance, and the provision of an underwater wavebreak plate can significantly reduce the effects of high waves.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a side sectional view showing another embodiment of the present invention.

FIG. 3 is a side sectional view showing another embodiment of the present invention.

FIG. 4 is a side sectional view showing another embodiment of the present invention.

FIG. 5 is a side sectional view showing another embodiment of the present invention.

FIG. 6 is a perspective view of the embodiment of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support member 2 Fine column base 4 Buoyancy room 5 Bottom part 6 Shell concrete layer 7 Offshore structure 8 Beam 9 Underwater break board

Claims (3)

(57) [Claims] 1. A support member having a truss structure, a marine structure partly fixed or combined with the support member, and a plurality of ones which are suspended from a lower surface of each of the support member and the marine structure. The part has a column base that is submerged in the sea, and the bottom of the above-mentioned column base is partially or entirely provided with a bottom part that forms a buoyancy chamber capable of adjusting the amount of water inside, so that the support member and By adjusting the gravity of the offshore structure and the buoyancy of the bottom part to make the bottom part soft bottom on the sea floor,
A soft-bottom type marine structure device, characterized in that a plurality of beams are used to connect each column base in the sea. 2. The soft-bottom type marine structure apparatus according to claim 1, wherein a shell concrete layer is formed around the narrow column base. 3. The soft-bottom type marine structure apparatus according to claim 1, wherein an underwater wave breaking plate is provided on an outer periphery.