JPS6085112A - Soft landing ocean structure - Google Patents

Abstract

PURPOSE:To construct an ocean structure for a short time, by a method wherein a plurality of pedestals, having a buoyant tank at its interior, are mounted to a deck part, and the lower ends of the pedestals are caused to softly land on the sea bottom through adjustment of the vertical position of the pedestal simultaneously with adjustment of the buoyancy of the pedestals. CONSTITUTION:After a deck part 2 and pedestals 3 are previously assembled, the deck part 2 is caused to float on the surface by increasing the entire buoyancy of the pedestals 3 over a total gravity through adjustment of an amount of water in a buoyant tank chamber 10. Thereafter, after a structure 1 is towed to a specified water area, the buoyancy of the pedestals 3 is decreased to sink the pedestals 3. Thereafter, when a landing part 9 mekes contact with the sea bottom, with a sensor 13 operated, the buoyancy of the tank chamber 10 is adjusted by means of a landing bottom controller and the landing part 9 is forced to softly land on the sea bottom. Simultaneously, through adjustment of the vertical position of each pedestal 3 by means of a position adjuster 12, the deck part 2 is horizontally balanced and the deck part 2 is held on the surface of the water.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an artificial structure constructed in the sea or on the surface of a lake, and provides a marine structure that can be used for multiple purposes such as an artificial marine city or a platform for an offshore oil field by arranging a large number of them in parallel. It is something to do.

Conventionally, there have been various proposals for marine structures, such as floating structures on the water surface and fixing them in place to a plurality of pillars buried in the seabed using suitable surface mooring means such as cables. For this reason, large-scale structures required many pillars to be buried, large-scale pillars, and complicated adjustment work for the holding means. Furthermore, since the structure was completely floating, it would sway due to changes in waves and currents, making it unsuitable for use as a living space.

Therefore, in the present invention, a plurality of column bases each having a buoyancy tank chamber inside are attached to the deck part, and the buoyancy of the column bases is adjusted.
The vertical position of the column base is adjusted, and the lower end of the column base is soft-bottomed to the sea floor to support the deck part.

The illustrated embodiment will be described in detail below. The marine structure 7 consists of a deck part on which a structure such as a house can be built, and a plurality of column bases 3 extending from the deck part.

The deck club is made of concrete and steel in play 1.
It has a multi-layered structure in which 4 layers are arranged at appropriate intervals in the vertical direction, and according to the embodiment shown in FIGS.
Detsukida α, lIb of the layer.

The first decker α on the lowest level is equipped with a logistics system, a waste recycling system, and an energy and water supply system.

A factory and the like will be built on the second deck 41b and will be used as a factory town. The sixth deck 41c is equipped with a traffic road and its control system. On the top floor, Tsuru 4 Decks, residences, shops, public facilities such as schools and hospitals will be built, and will be used for areas such as residences, education, government, medical care, leisure, etc., as well as areas such as aircraft landing pads.

Each deck α... is a pillar with column base 3 inserted through it! It is fixed to the flange part of... and held horizontally, and there is a banking 6 such as a chain or wire between each decker α...
It is suspended by... The distance between each decker α is approximately 20m between the first deck qα and the second deck pb, and approximately 20m between the second deck +6 and the fifth deck yc.
The distance between the fifth deck llc and the fourth deck lid is about -10 m. And between each deck, for example, an elevator or escalator can be provided on the column base 3 to enable mutual communication. In addition, each deck ya... may be provided with other environmental equipment etc. without being limited to the above-mentioned embodiment, and the deck portion may have a single layer structure or multiple layers other than four layers. good.

The column base 3 mentioned above has an inner column with a small diameter and a cylindrical cross section made of concrete or steel, and an outer column g that has a large diameter and a cylindrical cross section made of concrete or steel that wraps the lower part of the inner column 7.
It consists of

The upper part of the inner column 7 is loosely inserted into the column S, and the lower side is fitted into the hollow part of the outer column. The upper end of the outer pillar rim tapers toward the inner pillar 7 and is in close contact with the outer periphery of the inner pillar 7, and the lower end has a thick bottom part made of concrete or the like that is thicker in diameter than the outer pillar g. De is fixed. Therefore, the column base 3 has a small-diameter inner column located on the side facing the sea surface, which not only reduces wave resistance and the influence of tides, but also allows the center of gravity of the column base 3 to be set low, making it stable, and further improving the external appearance. Since the lower end of the column g is provided with a bottom landing part, the center of gravity of the column base 3 can be set lower. Further, since the bottom portion has a larger diameter than the outer pillar rim, the ground contact area of the pillar pedestal 3 becomes larger, and it is possible to prevent the pillar pedestal 3 from sinking.

A closed buoyancy tank chamber /θ surrounded by the inner peripheral surface of the outer pillar g and the outer peripheral surface of the inner pillar 7 is formed inside the outer pillar g. This buoyancy tank chamber lO is accessed from the outside of the outer column g by the buoyancy tank chamber lO.
A water injection pump (not shown) that supplies water into the buoyancy tank chamber lO and a discharge pump (not shown) that discharges the water supplied into the buoyancy tank chamber lO to the outside of the outer column g are installed. The amount of water within θ can be adjusted.

- Moreover, each column pedestal 3... is mutually connected by a plurality of connection members l/. Connecting member // is a long bar //a
and an annular joint member //b that can move the column base 3 attached to the end of the bar material //α in the vertical direction, and the joint member //b is connected to the length of each column base 3... Insert it in the middle of the hole.

What is provided inside the column q is the position adjustment device 12 for the column base 3. A rack 7.2cL is vertically fixed to the outer periphery of the inner column 7 of the column base 3, and the worm/2b and gear l YuC
A rotating shaft txt provided with is supported between each deck, a worm/λb and a rack/coat α are meshed, and a gear/2c is connected to a drive source/2f such as a motor via another gear/1g. do. Therefore, by rotating the driving source /2f in forward and reverse directions, the column base 3 moves up and down, and the vertical position of the column base 3 can be adjusted. This position adjustment device is provided independently for each column base 3, and a bottom landing control device (not shown) is provided.
This makes it possible to independently control the vertical positions of the odd columns 3....

The bottom landing control device is installed, for example, on the first deck shaft, and includes a pressure sensor/
3... is connected to... This sensor/3 electrically detects the difference between buoyancy and gravity acting on each column pedestal 3. The bottom landing control device constantly compares and monitors the signals sent from each sensor/3 with a preset balance signal, and adjusts the buoyancy of the buoyancy tank chamber 10 of any column base 3 when it deviates from the balance signal. do. This buoyancy adjustment is performed by electrically controlling the water supply/drainage pump provided in the buoyancy tank chamber IO to adjust the amount of water in the buoyancy tank chamber IO. Then, the total gravity and total buoyancy applied to the column base 3 are balanced, and the total gravity is controlled to be slightly greater than the total buoyancy, and the column is controlled to the extent that the structure / is not likely to move due to changes in waves or tidal currents. The bottom landing part of the leg 3 is controlled so that it touches the bottom softly on the seabed.

In addition, if the horizontal balance of the deck cannot be maintained due to irregularities on the seabed or changes in the geology, for example, a horizontal balancer may be installed on the deck, and the horizontal balancer may be connected to the bottom landing control device to prevent The vertical position of the legs 3 is controlled to be adjusted individually by a position adjustment device/2 to keep the deck part horizontal at all times and provide an optimal gutter space.

In order to install the structure 1 constructed in this way on the sea, the deck part and part of the column base 3 are assembled in part or in whole at a predetermined dock, etc., so that the total buoyancy of the column base 3 is reduced. The deck part is floated on the water surface by the buoyancy generated in the column base 3 by making it larger than the total gravity.

Then, it is towed by a ship or the like to a predetermined ocean position, and then the total buoyancy of the column pedestal 3 is gradually made smaller than the total gravity, and the column pedestal 3 is sunk. When the bottom part touches the seabed, the sensor / 3 is activated. The bottom landing control device allows the bottom landing part 9 of the column pedestal 3 to touch the bottom softly, and the vertical position of the column pedestal 3 is adjusted to keep the deck part level and hold the deck part above the water surface.

Then, drive the anchor /l into the seabed, and anchor /4'
and the column base 3 are connected by a restraining means 15 such as a chain or wire to prevent the structure l from tilting. Additionally, if necessary, a plurality of structures may be connected to form a large-scale maritime city.

In addition, when moving the structure, it is sufficient to remove the restraining means 3, make the total buoyancy of the column base 3 greater than the total gravity, and float it on the water surface and tow it with a boat or the like.

According to the above structure, the following effects can be obtained.

(1) The structure is simple because a separate buoyancy tank is installed on the structure, and the structure can be floated on the water surface and towed to a predetermined ocean location, so the structure can be constructed in advance at a dock or other location. It is possible to provide an effective offshore structure that can save labor and be constructed in a short period of time.

(2) Since the column base is soft-contacted to the seabed, the load on the column base can be reduced, and the rigidity of the column base can therefore be designed to be low, reducing the construction cost of the structure.

(3) Since the vertical position of each column pedestal can be adjusted, the structure can be installed anywhere, and the deck can always be kept horizontal, providing an extremely comfortable living space.

(4) After installation, the deck part is not completely floating, so not only does the structure not sway due to changes in waves or tidal currents, but an extremely simple deterrent means is sufficient, and there is no need for complicated There is no need for adjustment work, and construction costs for collapsed structures can be reduced.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a perspective view of a portion thereof, FIG. 2 is a side view of a portion thereof in cross section, and FIG.
The figure is a longitudinal cross-sectional view of the position adjustment device, and a cross-sectional view of its structure in Figure 4. 1...Marine structure, KO...deck part, 3...column base, 10...buoyancy tank, KO...position adjustment device. Patent Applicant Kiyoshi Kiku Take Figure 3 Figure 4 Procedural Amendments (Mutsu) December 6, 1981 1 Kazuo Wakasugi, Commissioner of the Patent Office 1, Indication of Case Patent Application No. 193063 1981 2, Invention Name Soft-Bottomed Marine Structure 3, Relationship with the Amended Person Case Applicant: Kiku Takehiro Nori 1-6-13 Nishi-Shinbashi, Minato-ku, Tokyo 105 Japan Phone: O3 (501) 8751 (Representative) 4324 Patent Attorney
Fuku 1) Correspondence 5, Date of amendment order, Showa year, month, day 6, Specifications subject to amendment, Drawings, Letter of appointment 7, Addendum E (7) Contents 11, 9 Contents 1) Engrave details 2) Submit the engraving drawings (with no changes in content) in a separate document. (3) Submit the letter of appointment in a separate document.

Claims (1)

[Claims] In a marine structure consisting of a deck part on which a structure can be constructed, and a plurality of column pedestals extending from the deck part and having their lower ends touching the seabed, the deck part is provided with a column pedestal position adjustment device. The upper and lower fIt numbers of each column pedestal can be adjusted independently, and each column pedestal has an independent buoyancy tank chamber inside to adjust the buoyancy of each column pedestal independently. A soft-bottomed marine structure characterized in that the lower end of each column pedestal is soft-bottomed to the seabed, and the deck portion is held above the water surface.