JPH01114588A - Floating marine structure having submerged wheel-type float - Google Patents

Abstract

PURPOSE:To stably support a structure, which is comparatively large in the plane size and which is set up in the sea, by supporting the superstructure by means of pillars erected on a wheel-type float consisting of a plurality of spokes extending radially from the central hub part to the rim part. CONSTITUTION:In this floating marine structure, since a rim part 14a, whose volume is large, is located at the periphery of a submerged, wheel-type float 14, well-balanced, large floating force can be obtained. In addition, since the sectional form of the submerged part of both float 14 and pillar 15 are of a circular shape and since no structure except the pillar 15 is existing in the vicinity of the sea surface at which the horizontal velocity of the water particle becomes maximum, both wave- or tidal- current-resistance can be reduced. In particular, since void spaces are existing among a plurality of spokes connecting the rim part 14a situated at the periphery of the float 14 to the central hub part 14b, the sea water is allowed to pass vertically through these void spaces. Therefore, no excessive lift acts on the float 14, owing to the lift produced by the vertical velocity and acceleration of the water particle of the sea waves. As a result, stable balancing can be ensured even at a place featured by severe, marine meteorological condition.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to floating marine structures, and more particularly to floating marine structures with submerged wheel type floats, which are particularly suitable for large structures. It is about things.

[Conventional technology] In recent years, various large structures such as marine airports, offshore bases, hotels, office buildings, parks, and plant basins have been constructed on the sea due to overcrowding on land, ocean development, and seabed resource extraction. is being planned or implemented.

Floating marine structures that can be used for this purpose include:
Conventionally, for example, the structure shown in Figure 3 has been proposed (see "Design and Construction of Marine Structures JP, 208-208, by Sakuji Nagasaki, published by Morikita Publishing Co., Ltd."). A superstructure 1 consisting of a superstructure 2 and a deck 3 on which it is placed, a submerged float 4 that supports it, a support 5 that connects the superstructure 1 and the submerged float 4, and a seabed. The anchor 6 is installed in the anchor 6, and the mooring rope 7 connects the submerged pipe C1-) 4 and the anchor B.

Such floating marine structures are suitable when they are relatively small in scale, for example with diameters or sides of 10
In cases where a large circular or square deck that reaches 0+* is required, various problems arise regarding the structure of the float, and therefore, there are limits to its use and the sea area in which it can be used is also limited. was there.

That is, waves generally involve vertical and horizontal movement of water molecules, and when the float 4 becomes large, an extremely large force acts on a part of the float due to the irregular movement of the water molecules.
In some cases, it may lead to destruction. Therefore, as the float becomes larger, it is necessary to further increase its strength. However, since increasing the strength leads to increasing the weight, it is necessary to prevent the float from receiving the force of water molecules. Consideration to avoid this will be necessary and effective.

[Problems to be Solved by the Invention] The present invention has been made by focusing on the above-mentioned problems, and is particularly aimed at relatively large-sized buildings such as marine airports and hotels. To provide a marine structure having a submerged float capable of stably supporting the structure when the structure is installed on the sea.

[Means for Solving the Problems] A floating marine structure of the present invention for achieving the above object has a float that supports an upper structure.

In a floating marine structure in which the float is stably maintained in a submerged state by connecting the float to an anchor on the seabed with a mooring cable, the float is connected to a surrounding annular rim part and a central hub part. and a plurality of spoke parts extending radially from the hub part and reaching the rim part, and an upper structure is attached to struts erected at appropriate intervals on this submerged wheel type float. It is constructed by supporting.

[For production]

A submersible wheel type float has a space between a plurality of spokes between the surrounding annular rim and the central hub, and seawater flows through this space, so seawater does not flow into the submerged wheel type float. It maintains a stable balance even in places with severe marine weather conditions without the excessive force associated with its movement, and is therefore suitable for marine airports, heliports, marine parking lots, marine hotels, office buildings, parks, residences, etc. It can be effectively used when installing relatively large structures on the sea.

In addition, the surrounding annular rim, central hub, and multiple spokes between them in a submerged wheel type float are suitable for ensuring sufficient buoyancy in a well-balanced manner, as well as stable balance. Suitable for keeping control, moreover,
It also has a configuration suitable for installing struts supporting superstructures with appropriate spans, thus making it possible to freely apply floating marine structures to relatively large structures.

[Example] Embodiments of the present invention will be described in detail below with reference to the drawings.

The floating marine structure of the embodiment shown in FIGS. 1 and 2 has an upper building 12 made of reinforced steel or concrete structure.
It is also the base of the upper building 12, and includes an upper structure 11 consisting of a concrete deck 13, etc., whose interior can also be used as a room.

The submerged float 14 that supports the upper structure 11 includes a peripheral annular rim portion 14a, a central hub portion +4b, and a plurality of spoke portions extending radially from the hub portion 14b and reaching the narrow portion 14a. 14c, 14c, . . . , and the submerged wheel type float [4] has a submerged wheel type float at appropriate positions on the rim portion 14a and the hub portion 14b in order to support the superstructure II. A number of columns 15 are erected in a well-balanced manner, and the upper structure 11 is supported by the columns 15. In addition, if necessary, the spoke parts 14c, 14c, etc. can also be supported! 5 can be erected.

The above-mentioned submerged flow) 14 has a honeycomb (Cs I l) structure, and in order to maintain the overall stability by injecting ballast water into each divided chamber according to the movement of the floating body, The posture sensor is connected to a computer, and control is performed by computer calculation. If there is sufficient buoyancy, a part of the inside of the flow 14 and the support column 15 may be used as a storage.

The submerged float 14 and the concrete gravity anchor 16 installed on the seabed are chain wires,
A one-point or multi-point tension mooring line 17 made of a steel bar, a rubber chain, a rope made of a polymeric material, etc. is connected via a flexible cable 18, so that the float 14 is stably held in a submerged state. . Flexible Ji above.

India 18 is 30m below sea level depending on the diameter.
This allows the mooring line 17 to be easily disconnected at a length of 5 m, and is constructed of a diagonal structure such as a carabiner or a train joint.

In addition, the above-mentioned deck 13. Submerged float 14, support 1
In consideration of maintenance and repair, it is preferable for Class 5 to be constructed of maintenance-free lightweight aggregate concrete.

In the floating marine structure having the above configuration, since the rim portion 14a having a large volume of the submerged wheel type flow) 14 is located on the outer periphery, a large and well-balanced buoyancy can be obtained, and the submerged float 14 and The shape of submerged parts such as the struts 15 is generally circular in cross section, and since the struts 15 are only located near the sea surface where the velocity of water molecules in the horizontal direction of waves is maximum, wave force or tidal current resistance can be made smaller.

In particular, between the surrounding rim part 14a and the central hub part 14b in the submerged flow 14, there is a space between the plurality of spoke parts 14c, +4c, and the fist, and seawater flows vertically through this space. As it circulates, the float 14 is caused by the velocity of water molecules in the vertical direction of waves, lift force due to acceleration, etc.
No excessive force is applied to the vessel, and a stable balance can be maintained even in severe marine weather conditions.

The space in the above submerged flow) 14 is 15 to 3
It is common to set it to 0%, which allows the upper and lower parts of the floating body to
Horizontal shaking and rotational shaking can be significantly suppressed.

It should be noted that since the upper building 12 is also subjected to a very large force of wind at sea, it is also effective to take measures such as making the planar shape of the upper building 12 circular to reduce wind resistance.

In addition, the surrounding annular rim part 14a, the central hub part 14b, and the plurality of spoke parts 14c, 14c, . 15 with an appropriate span. This pillar! 5 is generally about 20 to 25 m, and the rim portion 14
a, hub part 14b and spoke parts 14c, 14
c.

. . . makes the installation of columns at such spacings extremely easy to realize.

The installation depth ranges from approximately 10m for small-scale installations to approximately 100 to 1000m for large-scale installations.
Can be designed freely.

Such floating marine structures can be effectively used when installing relatively large planar structures on the sea, and
Since multiple floating marine structures can be easily connected and integrated, they can be used, for example, at marine airports, helipads, marine parking lots, marine hotels, office buildings, residences, underwater parks, marine leisure bases, various offshore bases, and temporary evacuation sites. Location, plant basin, platform for oil and seabed resource extraction, fishing base, fish reef,
It can be used for marine agriculture, ranching, marine energy structures, etc.

Furthermore, if necessary, the connection between the anchor 16 and the float 14 by the flexible jet 18 can be released, the floating marine structure can be moved freely, and the floating marine structure can be re-moored at the desired position. degree is significantly expanded.

When using this floating marine structure, communication from land is as follows:
Using helicopters, high-speed boats, etc., electricity can be generated by diesel power generation, wave power generation, ocean temperature difference power generation, biomass power generation, etc.
It can be secured through wind power, solar power generation, etc. Also, tap water can be used by treating seawater as fresh water, and sewage can be used by treating it in a septic tank or by chemically processing it into powdered fertilizer.

[Effects of the Invention] According to the floating marine structure of the present invention detailed above, by employing submerged wheel type floats, it is possible to construct relatively large planar structures such as marine airports and hotels on the sea. Since it can be stably supported when installed, it can be used extremely effectively as a multipurpose marine structure.

[Brief explanation of the drawing]

Fig. 1 is a front view of a floating marine structure with a submerged wheel type float according to the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Fig. 3 is a front view of a conventional example. be. 11@kai superstructure, 14-・Submerged float. 14a @-rim portion, 14b11-hub portion. 14c... Spoke part, 15... Support column, 18... Wedge anchor, 17... Mooring cable. Figure 1

Claims (1)

[Claims] 1. A floating marine structure that has a float that supports a superstructure and that is stably maintained in a submerged state by connecting the float to an anchor on the seabed with a mooring cable. In this, the float is a wheel-shaped float composed of a surrounding annular rim part, a central hub part, and a plurality of spoke parts extending radially from the hub part and reaching the rim part, and the float is submerged in water. A floating marine structure with a submerged wheel-type float, characterized in that a superstructure is supported by pillars erected at appropriate intervals on the wheel-type float.