KR20130093916A - Construction method for offshore structure - Google Patents

Abstract

PURPOSE: A construction method of sinking type marine construction capable of controlling the speed of sinking is provided to prevent a marine structure from moving in a lateral direction, and to control the speed of sinking. CONSTITUTION: A construction method of the sinking type marine construction capable of controlling the speed of sinking comprises the following steps of: forming a water storage room (120) in a main body (110) in a closed structure, and manufacturing a sinking type marine structure (100) that has an outlet (101) and an inlet (103) on the top and the bottom of water storing room, respectively; lifting the sinking type marine structure to the installation position of offshore in a state where the inlet is closed; and inducing water into a water storing room by opening the inlet, and sinking the sinking type marine structure with controlling the speed of sinking. The speed is controlled by slowly reducing the volume of air in the water storage room by reversely inducing the air through the outlet.

Description

Construction method of sinking offshore structure with adjustable sinking speed {CONSTRUCTION METHOD FOR OFFSHORE STRUCTURE}

Field of the Invention [0002] The present invention relates to a civil engineering field, and more particularly, to a method of constructing an offshore structure.

It is very difficult to construct an offshore structure on the sea floor such as the foundation of bridge bridges and the foundation of offshore wind power generation structures because it is very difficult to construct by concrete casting in the field. , Sinking (submerging) method which is installed on the sea floor is commonly used.

1 and 2 are process drawings for explaining a conventional method of constructing a submerged offshore structure.

The conventional submerged offshore structure 10 generally has a structure in which an upper portion is opened and a receiving space 11 for seawater is formed therein and seawater flows into the receiving space 11 to sink the offshore structure 10 .

However, when such a conventional method is applied, since the seawater does not constantly flow into the storage space 11 during flooding, the offshore structure 10 sinks while flowing left and right, and there is no way to control the sinking speed. There is a problem that the offshore structure 10 collides with the ocean floor or the installed offshore structure to cause damage.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a submerged offshore structure and a method of constructing the submerged offshore structure, which can prevent a lateral flow when a marine structure sinks and control a sinking speed .

In order to solve the above problems, the present invention is a submerged chamber 120 is formed in a closed structure inside the body 110, the outlet 101 and the inlet 103 is formed in the upper and lower portions of the submerged chamber 120, respectively Manufacturing a sunken offshore structure (100); A lifting step of lifting the sinking offshore structure 100 to the installation position of the ocean while the inlet 103 is closed; By opening the inlet 103 to allow water to flow into the submerged chamber 120, by inflowing air through the outlet 101, the volume of the air in the submerged chamber 120 is reduced slowly, It provides a method of constructing a sinking marine structure capable of adjusting the sinking speed, characterized in that it comprises a; sinking step of sinking while controlling the sinking speed of the sinking marine structure (100).

The submerged chamber 120 of the sinking marine structure 100 is formed in a plurality up and down, the inlet 103 is formed in the lower portion of the lower submerged chamber 120c of the plurality of submerged chambers 120, Outlet 101 is formed in the upper portion of the upper immersion chamber (120a) of the plurality of immersion chamber 120, it is preferable that the connection passage 102 is formed to connect the plurality of immersion chamber (120).

The width of the water immersion chamber 120 is preferably larger than the width of the inlet 103, the connection passage 102 and the outlet 101.

The width of the water immersion chamber 120 is preferably larger than the height.

The present invention proposes a submerged offshore structure and its construction method that can prevent lateral flow when sinking an offshore structure and control the sinking speed.

1 and 2 are process drawings for explaining a conventional method of constructing a submerged offshore structure.
3 or less shows an embodiment of the present invention,
3 and 4 are process diagrams of the first embodiment.
5 to 7 are process diagrams of a second embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figure 3, the construction method of the sunk marine structure according to the present invention, basically, the submerged chamber 120 is formed in a closed structure inside the main body 110, the upper and lower parts of the submerged chamber 120 Manufacturing a sinking marine structure 100 having outlets 101 and inlets 103 formed therein, respectively; Lifting step of lifting the sinking offshore structure 100 to the installation position of the sea in the state inlet 103 is closed (Fig. 3); By opening the inlet 103 to allow the water to flow into the submerged chamber 120, the air flows back through the outlet 101, so that the volume of the air in the submerged chamber 120 is slowly reduced, the sinking It is configured to include; sinking step (Fig. 4) to sink while adjusting the sinking speed of the formula marine structure (100).

That is, in the state in which the inlet 103 is closed by the stopper 104 or the like, the sinking offshore structure 100 is lifted to the installation position of the ocean, and the inlet 103 is opened to open the water in the submerged chamber 120. By allowing the inlet, it is constructed by sinking offshore structure 100.

In addition, by inflowing the air back through the outlet 101, the volume of the air in the submerged chamber 120 is reduced slowly, so that the sinking speed of the sinking marine structure 100 can be adjusted.

The buoyancy of an object is proportional to the volume occupied by the object in water. In the case of a compressible fluid such as air, the buoyancy becomes smaller as the volume becomes smaller by the water pressure as it enters a deep water depth.

Therefore, in the case of a large-scale offshore structure installed in the water of high depth, as the present invention by inflowing the air through the outlet 101 by the high-pressure air injector 200 or the like, the volume of the air in the submerged chamber 120 is high depth By slowly decreasing in spite of the state, it is possible to control the sinking speed (Fig. 4).

As the sinking speed is lowered as described above, it is possible to prevent the marine structure 100 from colliding with the sea bottom or the installed marine structure at a high speed to be damaged.

Further, when the offshore structure 100 is to be dismantled, the offshore structure 100 may be floated by injecting air through the outflow port 101, so that the disassembly operation is facilitated.

Even if only one submerged chamber 120 is formed in the main body 110 of the sunk marine structure 100, the above-described effects can be obtained, but the submerged chamber 120 is formed in a plurality of up and down, and the inlet 103 is a plurality of Is formed in the lower portion of the submerged chamber 120c of the submerged chamber 120, the outlet 101 is formed in the upper portion of the top submerged chamber (120a) of the plurality of submerged chamber 120, a plurality of submerged chamber 120 When taking the configuration in which the connection passage 102 is formed to connect each other, the above-described effects can be obtained even more.

In this configuration, water is gradually filled from the lower submerged chamber 120c among the plurality of submerged chambers 120. At this point, the water is filled in the lower portion of the marine structure 100, but the upper portion is filled with air. This is because a stable buoyancy structure is achieved so that the lateral flow of the offshore structure 100 does not occur.

In addition, since the water is completely submerged until the top submerged chamber 120a through the connection passage 102 from the lower submerged chamber 120c is completed, the sinking speed becomes slower. It is possible to more reliably prevent damage by colliding with existing marine structures at high speed.

It is preferable that the width of the water immersion chamber 120 is formed larger than the width of the inlet 103, the connecting passage 102 and the outlet 101.

That is, it is necessary that the width of the inlet port 103, the connecting passage 102 and the outlet port 101 is formed to be considerably smaller than the width of the water immersion chamber 120.

In addition, it is preferable that the width of the water immersion chamber 120 is made larger than the height (flat structure) in terms of stably and slowly bringing water upward.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It is to be understood that both the technical idea and the technical spirit of the invention are included in the scope of the present invention.

100: sinking type offshore structure 101: outlet
102: connecting passage 103: inlet
110: main body 120: water immersion chamber

Claims (4)

The submerged chamber 120 is formed in a closed structure inside the main body 110, and the sinking marine structure 100 having the outlet 101 and the inlet 103 formed on the upper and lower portions of the submerged chamber 120, respectively. step;
A salvage step of lifting the sinking offshore structure (100) to an installation position of the ocean while the inlet (103) is closed;
By opening the inlet 103 to allow water to flow into the submerged chamber 120, by inflowing air through the outlet 101, the volume of the air in the submerged chamber 120 is reduced slowly, Sinking step of sinking while controlling the sinking speed of the sinking marine structure (100);
Construction method of a sinking marine structure capable of adjusting the sinking speed comprising a. The method of claim 1,
The immersion chamber 120 of the sinking marine structure 100 is formed in plurality up and down,
The inlet 103 is formed at a lower portion of the lower submerged chamber 120c of the plurality of submerged chambers 120,
The outlet 101 is formed in an upper portion of the top submerged chamber 120a of the plurality of submerged chambers 120,
Construction method of the sinking-type marine structure capable of adjusting the sinking speed, characterized in that the connection passage 102 is formed so as to connect the plurality of immersion chamber (120). The method of claim 2,
The width of the submerged chamber 120 is greater than the width of the inlet 103, the connecting passage 102 and the outlet 101, the construction method of the sinking-type marine structure capable of adjusting the sinking speed. The method of claim 3,
The width of the submerged chamber 120 is larger than the height, the construction method of the sinking-type marine structure capable of adjusting the sinking speed, characterized in that formed.

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