KR101671579B1 - Installation method for gravity base structure using temporary cutoff wall - Google Patents

Abstract

The present invention relates to a method for installing a gravity type structure using a flywheel, and a method for installing a gravity type structure using a flywheel according to the present invention is a method for installing a gravity type structure for an offshore wind power and an algae power generation on a seabed surface or a mudstone, A preparation step of preparing a gravity type structure provided on a surface or a loamy mound and having a height lower than a depth of the hollow and having a plurality of partition walls; A step of joining a cauldron which is provided in a plate-like hollow shape and which is inserted into a partition disposed at an edge along the periphery of the caisson to form a hollow portion; A launching step of launching the gravity type structure at an upper portion of the installation place; A fluid supply step of supplying water to the inside of the parasitic membrane so that the gravity type structure descends to the bottom surface or the stony mound side without losing buoyancy; And removing the foreign matter film from the gravity type structure by supplying a fluid to the hollow portion to remove the foreign matter film from the gravity type structure. Thus, by installing the gravity type structure on the seabed or masonry mound without loss of buoyancy by using the fly ash, it is not required to mobilize large maritime equipments, and it is possible to construct by simple process and to save construction cost and air A method of installing a gravity type structure using a floating membrane is provided.

Description

TECHNICAL FIELD [0001] The present invention relates to a gravity type structure,

The present invention relates to a method of installing a gravity type structure using a fly ash, and more particularly, to a method of installing a gravity type structure using buoyancy without large-scale marine equipment, The present invention relates to a method of installing a gravity structure using a membrane.

Generally, there are various ways to obtain power without using fuel such as hydroelectric power generation, tidal power generation, solar power generation, wind power generation, and bird power generation.

Among them, wind power generation is a device to convert wind energy into electric energy by using large blades. It is advantageous that the energy source is infinitely clean energy and the time required for infrastructure construction is short and the required area is small. .

In addition, tidal power generation is less costly than tidal power generation because it does not require the construction of dams or breakwaters to secure reservoirs (George), and it does not interfere with the movement of fishes and the movement of fish, affecting the surrounding ecosystem It is an environmentally friendly alternative energy system.

In the case of wind power generation or algae power generation, the ratio of the cost of construction and maintenance of the support structure and foundation accounts for about 30 ~ 40% of the total construction cost. Such wind power generators and the like form various types of support structures.

FIG. 1 is a view showing a monopile type offshore wind force supporting structure, and FIG. 2 is a view showing a jacket type offshore wind force supporting structure. The monopile tower pillars and jacket-type supports are installed on the seabed ground through horseshoe and excavation, so there is a problem that the construction cost is large and the construction cost is high.

Accordingly, a method using a gravity type support structure has been proposed. 3 is a view showing a gravity type (Condeep type) offshore wind force supporting structure. When using the gravity type support structure in this way, all the work is done on the land, so the risk of marine construction is small and the construction cost can be reduced.

4 is a view schematically showing a conventional gravity type support structure installation method. Referring to FIG. 4 (a), a gravity structure such as a caisson of several thousand tons is transported from a production site on the land to a site where a large barge or a marine crane is used. When it is located at the installation site, it is lowered to the seabed mound (M) of the sea floor or the sea floor by using a floating crane.

Referring to FIG. 4 (b), when the upper part of the gravity type support structure is located above the water surface, buoyancy acts so that stable lowering is possible. That is, gravity acts from above, buoyancy acts from below, and stable action can be lowered due to the balance of both forces.

Referring to FIG. 4 (c), when the gravity supporting structure is lowered from the water surface by a predetermined height, and the upper part of the gravity supporting structure is located below the water surface, the buoyancy is lost. If the buoyancy is lost, the control of the launch speed becomes impossible, and the gravity structure will drop rapidly. As a result, there is a problem that the gravity type structure collides with the seabed surface and is damaged, or falls to a position different from the installation position as shown in FIG. 4 (d). In this case, there arises a problem that the gravity type structure is lifted up again to adjust the position, and this requires additional mobilization such as a large-sized marine crane, and a large loss such as an increase in the construction cost and limitation of the working days due to the marine condition .

SUMMARY OF THE INVENTION It is therefore an object of the present invention to solve such conventional problems, and it is an object of the present invention to provide a gravity type structure in which a gravity structure is installed on a seabed surface or a slag mound without loss of buoyancy The present invention provides a gravitational structure installation method using a parasitic membrane that can be constructed with a simple process and can reduce construction cost and air.

According to the present invention, there is provided a method for installing a gravity structure for offshore wind power and algae power generation on a seabed surface or a mudstone mound, comprising the steps of: Preparing a gravity type structure in which a plurality of partition walls are formed; A step of joining a cauldron which is provided in a plate-like hollow shape and which is inserted into a partition disposed at an edge along the periphery of the caisson to form a hollow portion; A launching step of launching the gravity type structure at an upper portion of the installation place; A fluid supply step of supplying water to the inside of the parasitic membrane so that the gravity type structure descends to the bottom surface or the stony mound side without losing buoyancy; And a step of removing the waste film removing the waste film from the gravity type structure by supplying a fluid to the hollow part. The gravity type structure installing method according to claim 1,

It is preferable that the height of the floating layer from the bottom surface of the gravity type structure to the top surface of the gravity type structure is higher than the depth of the water layer when the gravity type structure is coupled to the gravity type structure.

Here, it is preferable that the fluid supply step controls the rate at which the gravity type structure descends to the sea floor by controlling the amount of the supplied fluid.

Here, it is preferable that the parasitic membrane is provided with a plurality of wall portions provided in a hollow shape so that they can be coupled to each other.

Here, concave portions and convex portions are formed at both ends of the plurality of wall portions, and the convex portions are inserted into the concave portions of the adjacent wall portions.

According to the present invention, there is provided a method of installing a gravity type structure using a cauldron which can be constructed by a simple process and can reduce construction cost and air.

In addition, buoyancy is not lost in the course of descending gravity type structure from the water surface to the sea floor, and stable installation is possible.

In addition, due to the continuous action of buoyancy, the gravity type structure and the debris film can be firmly coupled to each other without any other configuration.

Further, the floating film is capable of separating a plurality of structures, and it is easy to combine and remove each other.

1 is a view showing a monopile type offshore wind force supporting structure.
2 is a view showing a jacket type offshore wind force supporting structure.
3 is a view showing a gravity type (Condeep type) offshore wind force supporting structure.
4 is a view schematically showing a conventional gravity type structure installation method.
FIG. 5 is a flowchart of a method of installing a gravity type structure using a parasitic membrane according to an embodiment of the present invention.
FIG. 6 is a view showing a preparation step of a gravity type structure installing method using the moving body of FIG. 5; FIG.
FIG. 7 is a view schematically showing a binding step of a floating membrane in the method of installing a gravity structure using the floating membrane in FIG. 5; FIG.
FIG. 8 is a view schematically showing a floating membrane of a gravity type structure installing method using the floating membrane of FIG. 5; FIG.
FIG. 9 is a view schematically showing a fluid supply step and a debris removal step of the gravity type structure installing method using the debris flow of FIG. 5; FIG.

Hereinafter, a method of installing a gravity type structure using a damper membrane according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The method of installing a gravity structure using a damper membrane according to an embodiment of the present invention does not require the mobilization of a large marine equipment by installing a gravity structure on a seabed surface or a sandstone mound without loss of buoyancy using a damper membrane The present invention relates to a gravitational structure installation method using a parasitic membrane that can be constructed by a simple process and can reduce construction cost and air.

FIG. 5 is a flowchart of a method of installing a gravity type structure using a parasitic membrane according to an embodiment of the present invention. Referring to FIG. 5, a gravitational structure installation method (S100) using a parasitic element according to an embodiment of the present invention includes a preparation step (S110), a parasitic membrane coupling step (S120), a deciphering step (S130) A supplying step S140 and a debris removal step S150.

The preparation step S110 is a step of preparing a gravity type structure in which a bird's power generation apparatus or a wind power generation apparatus such as a water turbine is installed and supported using a power generation system in which the potential energy is converted into kinetic energy from the water level difference between tides . Gravity type structures include caisson or concrete type precast concrete support structure in the form of a condeep. For convenience, the gravity structure is assumed to be a caisson.

The caisson 110 is a reinforced concrete structure constructed from a dock or land dock and is transported to the site by a fishing line or a crane line and installed as a breakwater or a crawler body in a gravity type structure. In this embodiment, the caisson 110 is a gravity type caisson, which is installed on a boulder mound M as a base part, and a plurality of partitions 111 are formed to fill the interior of the partitions 111 with concrete, It is a fixed structure. That is, the caisson 110 is made of concrete, and is formed in a hollow shape so as to fill other materials therein, and a plurality of partition walls 111 are formed. The final fabricated caisson 110 will weigh about 3,000 tons or more.

The caisson 110 is installed on a seabed mound M formed on a seabed surface or a sea floor, and the height of the caisson 110 is set to be smaller than the depth at a place where the caisson 110 is installed. For example, when the caisson 110 is installed in a region having a depth of about 40 m, the caisson 110 has a height of about 10 m. However, the numerical values are not limited, and it is desirable to comprehensively consider the location of the installation and the size of the tidal power generator.

Meanwhile, it is preferable that a stony mound (M) is formed in the area where the caisson 110 is installed on the seabed surface during the preparation step (S110), or a planarization operation is performed.

The binding step S120 is a step of binding the parasitic membrane 120 to the caisson 110 so as not to lose the buoyant force when the caisson 110 descends from the water surface to the bottom surface of the installation site or the stony mound M side .

The floating body 120 is provided in a plate shape and a lower end portion is inserted into a partition wall 111 located at an edge along the periphery of the caisson 110. The cauldron 110 is generally formed in a rectangular parallelepiped shape so that the cauldron 120 is inserted into each side of the upper surface of the caisson 110, that is, on four sides thereof to form a hollow portion 121 in the center.

When the lower end 120 is inserted into the caisson 110, the cauldron 120 is provided on the upper surface of the caisson 110 from the bottom of the caisson 110, Is higher than the water depth. That is, the total height of the caisson 110 in the state where the cauldron 120 and the cauldron 120 are combined is set to be higher than the water depth. For example, when a caisson 110 having a height of 10 m is installed in a region having a depth of 40 m, assuming that the depth of the cauldron 120 inserted into the caisson 110 is 5 m, Is provided to have a height of at least 35 m or more.

As described above, when the upper part of the caisson 110 is exposed on the water surface, there is no problem because buoyancy acts from below. However, when the caisson 110 is completely immersed in water, buoyancy is lost, . However, in this embodiment, the parasitic membrane 120 is coupled to the caisson 110, the upper portion of the parasitic membrane 120 is always exposed on the water surface, and the air is placed in the hollow 121, Buoyancy is received. Thus, in this embodiment, since the caisson 110 does not lose gravity, the caisson 110 can be stably and quickly lowered to the seabed surface or the stony mound M side.

On the other hand, the parasitic membrane 120 is provided with a plurality of wall portions 122, and in this embodiment, four wall portions 122 are provided according to the number of sides of the upper surface of the rectangular parallelepiped casing 110. That is, the wall portion 122 is provided so as to correspond to the length of each side of the upper surface of the casing 110, and both ends thereof are provided to be mutually engaged and disengaged with the neighboring wall portion 122. At this time, a convex portion 122a protruding outward is formed at one end of both ends of the wall portion 122, and a concave portion 122b recessed inward is formed at the other end portion. Therefore, each wall portion 122 is coupled to each other by being coupled to the recess 122b of the wall portion 122 adjacent to the one end convex portion 122a, thereby facilitating the engagement and disengagement of the wall portions 122 with each other.

The flooding step S130 is a step of moving the structure in which the caisson 110 and the parasitic membrane 120 are combined to the water surface above the installation site. Both the caisson 110 and the deodorizing membrane 120 are manufactured on the land, and are shipped to the DCL (Draft Control Launcher) and then moved to the installation site.

The fluid supply step (S140) is a step of supplying water into the inside of the deodorizer membrane 120. Water is supplied to the inside of the parasitic membrane 120 in order to lower the coupling structure of the caisson 110 and the parasitic membrane 120 located on the water surface to the sea floor or the mudstone M in the deciphering step S130.

When water is supplied to the inside of the flue 120, gravity caused by water acts from above. On the other hand, the water is not supplied to the hollow portion 121 formed by the debris 120, and the air is located, so that the caisson 110 does not lose buoyancy. Therefore, the caulk 120 and the caisson 110 are firmly coupled to each other by a force acting from above and a force acting from below. Thus, the caulking membrane 120 is not separated from the caisson 110 without a separate engaging member.

In addition, when the phlegm film 120 is lowered to the sea floor in a state where it is coupled to the caisson 110, hydrostatic pressure acts from the side surface of the phlegm membrane 120. Accordingly, the side surface of the parasitic membrane 120 inserted into the caisson 110 and the side surface of the caisson 120 are more closely contacted. Accordingly, the caisson 110 and the caulk 120 are more firmly coupled.

On the other hand, the rate at which the caissons 120 descend can be controlled by controlling the amount of water supplied into the parasitic membrane 120. It is possible to control the position of the caissons 110 easily by preventing the floating of the caustic 120 from being lost due to the binding of the caustic 120 to the caisson 110, It is possible to regulate the dropping speed by adjusting the amount, so that the caisson 110 can be stably and quickly installed.

The debris removing step S150 is a step of removing the debris 120 from the caisson 110 installed on the seabed surface or the masonry mats. When a plurality of caissons 110 are installed, since the cauldron 120 is detachable from the caisson 110, when one caisson 110 is completely installed, it can be recycled when another caisson 110 is installed .

The height of the cauldron 120 is set such that the total height of the caisson 110 and the caulk 120 is higher than that of the water surface when the lower end is inserted into the caisson 110, The upper end of the debris 120 is exposed on the water surface. Air is present in the hollow portion 121 so that the caisson 110 does not lose buoyancy in the fluid supply step S140. In other words, due to the air in the hollow portion 121, the caisson 110 does not lose buoyancy, which makes the caisson 110 and the deodorant membrane 120 more tightly coupled.

Thus, the debris removing step S150 removes the debris 120 from the caisson 110 by causing the caisson 110 to lose its buoyancy. Accordingly, water is supplied to the hollow portion 121 filled with air so that the hollow portion 121 is filled with water. Thereby, the caisson 110 is lost in buoyancy, and therefore, the caisson 110 and the caulking membrane 120 also become loose. Thereafter, the parasitic membrane 120 is removed from the caisson 110 by a small crane or the like.

When the hollow portion 121 is filled with air, the cauldron 110 continuously receives the buoyancy so that the cauldron 120 and the caisson 120 are continuously exposed to the water surface, When the hollow part 121 is filled with water, the caustic membrane 120 can be easily removed from the caisson 110 because the caustic membrane 110 loses buoyancy.

Therefore, according to the present invention, since the gravity type structure is installed on the seabed surface or the rocky mound without loss of buoyancy by using the fly ash, it is not required to mobilize large maritime equipments, A gravitational structure installation method using a parasitic structure capable of reducing the weight of the gravitational structure can be provided.

The scope of the present invention is not limited to the above-described embodiments, but may be embodied in various forms of embodiments within the scope of the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

S100: How to install a gravity structure using a volcanic ash
S110: Preparation step S120: Alkali film bonding step
S130: decimal number step S140: fluid supply step
S150: Removing the debris film 110: Caisson
120:

Claims (5)

A method for installing a gravity structure for offshore wind power and algae power generation on a seabed or masonry mound,
A preparation step of preparing a gravity type structure provided at the bottom of the sea bed or the mudstone and having a height lower than the water depth and having a hollow shape and having a plurality of partition walls;
A method of manufacturing a gravity type structure, comprising: joining a cauldron, which is provided in a plate-like hollow shape, to form a hollow portion inside a partition wall disposed at an edge along a circumference of the gravity type structure;
A launching step of launching the gravity type structure at an upper portion of the installation place;
Wherein the gravity film is supplied with water to lower the gravity type structure to the sea floor or the masonry mound side, wherein the gravity film structure is exposed to the atmosphere so that the gravity type structure is lowered without losing buoyancy, ;
And removing the floating film from the gravity type structure by supplying a fluid to the hollow portion to remove buoyancy force, thereby removing the floating film from the gravity type structure. The method according to claim 1,
The above-
Wherein a height from the bottom of the gravity structure to the top surface of the gravel structure is greater than the depth of the gravel structure when the gravel structure is coupled to the gravity structure. 3. The method of claim 2,
Wherein the fluid supply step comprises:
And controlling the amount of the supplied fluid to control the descending speed of the gravity type structure to the seabed surface. 4. The method according to any one of claims 1 to 3,
Wherein the parasitic membrane is provided with a plurality of wall portions provided in a hollow shape so that they can be coupled to each other. 5. The method of claim 4,
Wherein the plurality of wall portions are formed with concave portions and convex portions at both ends thereof, and the convex portions are inserted into concave portions of the adjacent wall portions.

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