KR20080105361A - Floating member using buoyancy and ground bearing force and the construction method using the same - Google Patents

Abstract

A landing type floating body using buoyancy and bearing capacity is provided to use bearing capacity of the underwater ground effectively, and to be safer by using buoyant occurring in a floating body appropriately. A landing type floating body(100) for an underwater structure using buoyancy and bearing capacity comprises a body portion(110) having a buoyancy generator including an inside space and receiving buoyancy, a width-expanded bottom portion(120) extended downward to be larger than the width of the body portion and provided with a shear key(121) projected downward at the bottom to make the front end driven into the underwater ground(200), and an adsorption space portion(S) closed appropriately between the bottom of the width-expanded bottom portion and the surface of the underwater ground.

Description

FLOATING MEMBER USING BUOYANCY AND GROUND BEARING FORCE AND THE CONSTRUCTION METHOD USING THE SAME}

1A and 1B show spheres for a structure installed in a conventional water.

Figure 2 illustrates a landing float of the present invention.

Figures 3a, 3b and 3c shows the comparison of the support performance of the floating floating body of the present invention and the prior art for the vertical load.

Figures 4a, 4b and 4c is a comparison of the support performance of the floating floating body and the conventional floating body of the present invention for the horizontal load.

Figures 5a, 5b and 5c is a comparison of the support performance of the floating and the conventional floating body of the present invention for conduction.

Figures 6a, 6b and 6c shows a schematic construction sequence of the landing floating body of the present invention.

<Description of the symbols for the main parts of the drawings>

100: buoyancy body 110 for underwater structures: body

111: buoyancy generating means (inner space part) 112: buoyancy adjusting means (water)

113: buoyancy control device (water tank) 114: connector

120: expansion bottom 200: Underwater ground

210: Improved (reinforced) underwater ground

The present invention relates to a floating floating body using buoyancy and support reaction force and a structure construction method using the same. More specifically, as a structure installed in the water to support the load acting on the buoyancy body by the buoyancy and the ground reaction force of the submarine ground, unlike the prior art, it is possible to omit the underwater ground improvement or reinforcement work, economical and efficient production, It relates to a structure construction method using a floating floating body that can be designed and constructed.

Conventionally, the dolphin-type eyepiece or breakwater is made of a sphere having a predetermined volume in the underwater ground, as shown in Figure 1a is constructed so that the bottom is supported on the underwater ground 30, usually made of reinforced concrete or concrete sphere 10, It can be regarded as a kind of gravity structure (gravity structure) in the sense of being constructed and self-supporting by its own weight.

Therefore, the self load W of the sphere 10 itself and the additional load added to the upper portion of the sphere 10 are transferred to the underwater ground 30 via the sphere 10, so that the sphere 10 is safely maintained. Self-bearing loads and loads transferred from the sphere 10 should be secured to the ground strength of the underwater ground to be offset by the supporting reaction force (R) acting under the sphere (10).

However, the underwater ground 30 is generally formed of a fin layer, and thus insufficient to support a gravity-type structure such as a large sphere 10, and usually, the operation of improving the underwater ground 30 first is preceded.

In other words, there is preceded a work to ensure that the support reaction force capable of resisting the weight of the gravity-type structure and the like through the underwater ground 31 is improved (reinforced).

The method of improving the underwater ground 30 is greatly improved the underwater ground 30 itself, such as a deep mixing treatment method (DCM, DMM, RJP method, etc.) or sand, gravel compaction pile method (SCP, GCP method, etc.) Or to install a pile for supporting the sphere 10 on the underwater ground 30 and the reinforcement method such that the sphere 10 is installed on the pile has been introduced,

Since these methods can only be done underwater, the cost is very large, accounting for about 30 ~ 40% of the actual cost of constructing underwater structures, and whether these costs can be reduced is a very important factor in the construction of economic underwater structures. It was a matter of course.

Thus, a method (floating structure) using the floating body 20 that can be constructed without improving the soft underwater ground 30 has been introduced, and a representative example thereof is illustrated in FIG. 1B.

Referring to FIG. 1B, first, the lower part is submerged in water and the upper part can be identified as the floating body 20 exposed to the water phase. The inside of the floating body 20 is partitioned inside space 21 is formed. Because of this, buoyancy (B) is received.

If this buoyancy force (B) is equal to the self-weight (W) of the floating body 20, the floating body 20 is floating in the water, if the buoyancy (B) is the magnetic weight (W) of the floating body 20 In addition, it can be seen that it is possible to construct a very efficient underwater structure if it can support additional loads.

However, in order to secure the required buoyancy (B) there is a fear that the size of the floating body 20 is geometrically large, diarrhea, the position is constrained by the wire 50 to the fixture 40 temporarily installed in the underwater ground Although it can be made, but because it is very vulnerable to the horizontal load, there was a problem that there is a certain limit to construct a large underwater structure using this floating body 20.

Accordingly, the present invention, in the manufacture and construction of the underwater structure, while effectively using the support reaction force of the underwater ground mixed appropriately buoyancy generated in the floating body safer and more economical floating floating body for underwater structures and structures using the same It is the technical problem to provide a construction method.

The present invention to achieve the above technical problem

In forming a buoyancy body for an underwater structure, buoyancy generating means (111) including an inner space portion in which the buoyancy body is formed is formed body portion 110 which receives buoyancy in the water; And a widening bottom portion 120 which is integrally formed with the body portion 110 and extends downward to be wider than at least the body portion, and further includes a shear key 121 protruding downward on a bottom thereof so that the tip portion is embedded in the underwater ground. It was.

That is, the widening bottom portion 120 installed to be embedded in the underwater ground 200 by the shear key 121 to effectively secure the support reaction force (R) by the underwater ground 200 without improvement work, while the body locked in the water By the buoyancy of the buoy 110 to basically resist the vertical load acting on the float,

Horizontal loads due to waves, water pressure, etc. are to be resisted by the mechanical friction and the bearing force of the widening bottom portion 120 embedded in the underwater ground 200,

The conduction moment for conducting the floating body is to be resisted by the resistance moment (the right moment due to the ground reaction force and the adhesive force) by the widening bottom portion 120 embedded in the underwater ground 200,

As a result, the floating floating body 100 can be safely installed in the underwater ground 200 without improving the underwater ground 200.

BRIEF DESCRIPTION OF DRAWINGS To describe the present invention more clearly and easily, the following describes the best embodiments of the present invention in detail with reference to the accompanying drawings, and embodiments according to the present invention may be modified in various other forms, and thus the scope of the present invention. Is not limited to the embodiment described below.

2 is a floating floating body of the present invention,

3a to 3c shows the support performance of the floating floating body and the conventional floating body of the present invention for the vertical load,

Figures 4a to 4c is the support performance of the floating floating body and the conventional floating body of the present invention for the horizontal load,

Figures 5a to 5c shows the support performance of the floating body of the present invention and the conventional floating body for the conduction,

6a to 6c show a schematic construction sequence of the floating floating body of the present invention.

First, the ground-floating floating body 100 using the buoyancy and the support reaction of the present invention will be described with reference to FIG.

The landing floating body 100 is largely composed of the body portion 110 and the widening bottom portion 120, and looks at the basis of the case is made in the form of a rectangular parallelepiped as a whole.

The floating floating body 100 composed of the body portion 110 and the widening bottom portion 120 is previously manufactured integrally on the land, but may be usually made of a reinforced concrete or concrete material, but is not necessarily limited thereto.

For example, it may be made of steel or FRP material, it may be made of a composite of a combination of concrete and steel.

The body part 110 may be formed in the inner space portion is partitioned for buoyancy induced therein, the inner space portion may be formed in an empty state, but the specific gravity to secure a predetermined strength is lower than water Buoyancy increasing means including an EPS block may be further installed.

The internal space is formed in a closed space in various forms, such as formed inside the body portion 110 in the form of an independent cell (CELL) in the form of a honeycomb structure (honeycomb structure).

As a result, the body part 110 receives the buoyancy force B in the water by the inner space part. In this sense, the inner space part is referred to as the buoyancy generating means 111.

This buoyancy can be adjusted to the size of the buoyancy by the total volume occupied by the buoyancy generating means 111 including the inner space in the body portion (110).

Accordingly, in the present invention, the buoyancy adjustment means 112 including water in the buoyancy generating means 111 is charged and discharged so that the magnitude of buoyancy acting on the trunk portion 110 can be adjusted.

In addition, as will be described later, the buoyancy adjustment device 113 including a water tank to be charged and discharged separately from the buoyancy generating means 111 is further installed on the trunk portion 110 to install and dismantle the floating floating body 100. This will make the move more efficient.

Only the buoyancy control device 113 may use a means such as a water tank, but may simply use a buoyancy generating means 111 such as an inner space.

The widening bottom portion 120 is configured to form a lower portion of the floating floating body integrally with the body portion (110).

At this time, the widening bottom portion 120 is also made of a spherical shape as a whole, the important thing is that the width of the widening bottom portion is formed to be larger than the width of the body portion 110 and the shear key 121 protruding downward on the bottom or lower surface is more It is formed.

The widened bottom allows the body part 110 to more effectively resist conduction, and the mechanical frictional force with the underwater ground can be increased by the expanded area, effectively counteracting the horizontal load acting on the body part. It becomes possible to cope.

The bottom or bottom of the wide bottom portion 120 is further formed with a shear key 121 is formed to protrude downward, such a shear key 121 is formed so that a plurality of spaced apart from each other according to the area of the wide bottom portion 120, such a shear key 121 ) Is constructed to be embedded in the underwater ground (200).

As a result, the floating body 100 can more effectively resist the underwater ground 200 by the widening bottom portion 120, and can distribute and deliver the working load transmitted from the trunk portion 110 to the underwater ground 200. You will see that there is.

In this case, the shear key 121 may be totally embedded in the underwater ground 200, but as shown in FIG. 2, the adsorption space portion S is closed between the bottom of the wide bottom portion 120 and the surface of the underwater ground 200 as shown in FIG. Is formed, such that the air of the adsorption space (S) can be discharged and injected based on the inside of the body portion 110 as shown in Figure 5b by the bottom of the wide bottom portion 120 surface of the underwater ground 200 It is desirable to be able to adsorb or separate to.

That is, as shown in Figure 5b, the adsorption space portion (S) is provided with a connecting pipe 114 that communicates with the body portion 110, using the air not shown in the adsorption space (S) connecting pipe ( It can be seen that the floating body 100 can be securely installed in the underwater ground 200 by allowing the body 110 to be discharged or injected from the body 110 through 114.

3a, 3b and 3c is a conventional gravity floating body (10, gravity type structure) to the action on the vertical load (self-floating and additional load load of the floating body) in the floating floating body 100 of the present invention as described above , Compared with the floating body 20 (floating structure).

That is, according to Figure 3a conventional gravity floating body 10 can be seen that the spherical form of the rectangular parallelepiped in the underwater ground 200 is installed so as to be in contact with the entire underwater ground 210 is improved, including the additional loading load It can be seen that the self-weight (W) of the gravity-type floating body 10 is supported by both the ground reaction force (R2, the ground force of the unimproved underwater ground R2) of the improved underwater ground (200).

In other words, the conventional gravity floating body 10 is designed to support all of the magnetic weight (W) in the subsurface ground 200, when the underwater ground 200 is a soft ground, such as the soil layer, by improving this to a greater support reaction force Should be able to have a bar, it can be seen that the rough ground costs will be large,

According to FIG. 3B, it can be seen that the magnetic weight W including the additional load of the floating body 20 is supported by the buoyancy B of the floating body 20.

When the size of the float increases, the size of the float may be unnecessarily large because it is necessary to secure enough buoyancy to support its own weight (W). As it can only be increased, it can be seen that it is somewhat insufficient for use in large and large underwater structures.

According to FIG. 3c, in the case of the floating floating body 100 according to the present invention, the self weight W including the additional load therein is primarily supported by the buoyancy force B acting on the body part 110. The lower part of the floating body is embedded in the underwater ground 200 by the shear key 121 at the bottom of the wide bottom portion 120 and is supported by the ground reaction force R1 without improving the underwater ground 200. It can be seen that the present invention, after all the buoyancy and support reaction of the floating body to resist the self-weight so that the construction cost increase factor due to the improvement work of at least the subsurface (200), which is a soft ground can be omitted. It can be seen that, when adjusting the size of the buoyancy can be seen that the manufacturing cost can be significantly reduced by making the body portion 110 more slimmer,

The floating body of the present invention is called a bottoming type in that the lower part is installed to be in contact with the underwater ground while using buoyancy.

Figures 4a, 4b and 4c is a conventional gravity floating body (also known as the impact on the horizontal load (hydraulic pressure acting on the float, impact load due to the wave) in the landing floating body 100 of the present invention as described above) 10, gravity structure), floating body (20, floating structure) is shown.

That is, according to FIG. 4a, the conventional gravity floating body 10 is a rectangular parallelepiped shape, which is installed on the underwater ground 200 so that the entire bottom thereof is in contact with the improved underwater ground 210. It can be seen that the horizontal load V including the load is supported by the frictional force F2 with the improved underwater ground 210 formed on the underwater ground 210.

However, the gravity floating body 10 can be seen that there is a limit to effectively secure the friction force (F2) because the lower surface is flat as a sphere.

4b, it can be seen that the float 20 is particularly vulnerable to horizontal load V because the resistance to horizontal load V depends entirely on the fixture 40 and the wire 50. On the other hand,

According to FIG. 4C, in the case of the floating floating body 100 according to the present invention, the lower portion of the floating body is initially stuck to the underwater ground 200 by the shear key 121 at the bottom of the widening bottom portion, thereby securing more effective frictional force (F2). It can be seen that it is possible to take a very stable behavior.

Figure 5 shows the action on the conduction (temporary impact load during construction, fluctuations in water pressure, etc.) in the landing floating body 100 of the present invention in particular as described above.

As a result, in the case of the present invention, the point force C and the ground reaction force R1 with the underwater ground 200 become superior to each other by the expansion bottom 120 embedded in the underwater ground 200 by the shear key 121. It can be seen that the resistance to the conduction moment (M), so that it is possible to prevent a larger conduction compared to the conventional floating body 20 and the conventional gravity sphere (10).

In addition, the landing floating body 100 of the present invention can take both buoyancy force (B) generated as the floating body 100 and ground reaction force (R2) generated as a sphere without improving the underwater ground 200. It can be seen that it is possible to construct an economical underwater structure.

6a, 6b and 6c it can be seen that the construction method of the floating floating body 100 of the present invention as described above,

According to FIG. 6a, first, the floating floating body 100 manufactured on the ground is to be submerged in the water by using a large water crane, but approximately half, and the floating floating object 100 should be installed using a tugboat or the like. You can see that it is initially set to move to that location,

At this time, the grounded floating body 100 includes water in the inner space of the body portion 110 constituting the floating floating body 100 to easily secure the buoyancy (B) that can be floating in the water By using the buoyancy adjustment device 113 including the water tank so that the buoyancy adjustment means 112 is filled and discharged so that the buoyancy (B) required for the floating floating body 100 can be sufficiently secured.

Thus, as shown in FIG. 6B, the landing floating body 100 is towed to a predetermined installation position using a tugboat or the like, and the shear key 121 of the widening bottom portion 120 constituting the landing floating body 100 is underwater. It will be installed to be stuck to (200).

This operation is finally possible through the operation of allowing the buoyancy adjustment means 112 including more water in the buoyancy adjustment device 113 to be lowered to the landing floating body (100).

At this time, according to the extractive perspective view of Figure 6, the floating floating body 100 so that the adsorption space (S) between the bottom or bottom of the wide bottom portion 120 is formed from the surface of the underwater ground 200 between the shear key 121 ) To adjust the depth of descent, and to allow the air of the adsorption space (S) to be discharged to the body portion 110 or injected from the body portion 110 through the connection pipe 114 (floating type floating body ( It can be seen that the 100 can be more securely fixed to the underwater ground 200.

Further, in the case of the floating floating body 100 fixed to the underwater ground 200,

First, although not shown, one end is connected to the fastener 40 installed in the underwater ground spaced from the floating float, and the other end is connected to the ground floating float to further install a wire (50) To effectively resist the working load of (100),

Secondly, although not shown, the anchor or pile is installed on the wide bottom to penetrate the inner surface of the wide bottom to extend downwardly into the underwater ground where the floating floating body is installed. Can be.

On the top surface of the fixed floating floating body 100 is fixed as above may be further installed a structure including an additional packaging layer, which is for permanent structure installation, if the temporary structure installation,

As shown in FIG. 6C, the buoyancy acting on the floating floating body 100 is reduced by discharging the water filled in the buoyancy adjusting device 113 to float the floating floating body 100 in water and move it back to a desired position. It can be seen that.

According to the present invention, by using the buoyancy generated in the floating body and the ground reaction force acting on the sphere as a conventional underwater structure to more effectively resist the vertical load, horizontal load and conduction acting on the floating floating body To this end, it is possible to reduce the cost by improving the ground (reinforcement) of the underwater, and thus it is possible to provide a floating floating body using buoyancy and support reaction force and structure construction method using the same, which can be more economically and efficiently designed, manufactured and constructed. .

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

Claims (15)

In the float for underwater structures, The floating body is formed with buoyancy generating means including a partitioned inner space portion to receive buoyancy in water; And a widening bottom portion which is integrally formed with the body portion and extends downward to be at least wider than the body portion, and has a shear key protruding downward on the bottom so that the tip portion is embedded in the underwater ground; buoyancy and supporting reaction force including buoyancy Fluid. According to claim 1, wherein the body portion or widening bottom portion is a floating floating body using buoyancy and support reaction force made of a gravity-type structure including concrete or reinforced concrete. The floating body according to claim 1 or 2, wherein the inner space is formed to be empty or buoyancy adjusting means including water is charged and discharged to adjust the magnitude of buoyancy generated. The floating floating body using buoyancy and support reaction force according to claim 1 or 2, further comprising a buoyancy adjustment device including a water tank in which the buoyancy adjustment means including water is filled and discharged. The floating body of claim 3, wherein buoyancy and support reaction force is further installed in the empty space formed in the inner space to further install buoyancy increasing means including an EPS block having a specific gravity lower than that of water. According to claim 1, One end is connected to the fastener installed in the underwater ground spaced from the floating floating body, the other end is a floating floating body using buoyancy and support reaction force is further installed wire connected to the floating floating body . The floating body of claim 1, wherein an anchor or pile is further installed inside the widening bottom portion so that the tip extends downwardly into the underwater ground where the bottom floating portion is installed. According to claim 1, wherein the connecting pipe for discharging and injecting the air of the adsorption space portion formed by the upper surface of the underwater ground between the shear key and the bottom of the wide bottom portion is further formed in the floating floating body so as to communicate with the adsorption space portion and the body portion. The floating floating body using buoyancy and support reaction force by which the bottom of the widening bottom portion is adsorbed or separated from the upper surface of the underwater ground. A buoyancy generating means including a partitioned inner space portion is formed to receive a buoyancy in the body; Producing a buoyancy body for a structure comprising a; and the body portion extends downward to at least wider than at least the body portion, a wide bottom bottom protruding downwardly protruding downward on the bottom so that the tip portion is embedded in the underwater ground; Tow the buoyancy body underwater in the vicinity of the underwater ground which is not ground reinforced, The buoyancy adjusting means including water is filled in the inner space of the buoyancy body so that the buoyancy body is set so that the shear key tip of the buoyancy body is embedded in the submerged ground and the body protrudes into the water phase. Method for constructing a structure using a floating floating body using buoyancy and support reaction force comprising the step of fixing the set buoyancy body. 10. The method of claim 9, further comprising the step of forming a buoyancy and support reaction to the floating floating body, the connection pipe for discharging and injecting the air in the adsorption space portion closed by the upper surface of the underwater ground between the shear key and the bottom of the widening bottom portion Structure construction method using the floating floating body. The method according to claim 9 or 10, wherein the buoyancy adjustment means including water is discharged to the inner space of the buoyancy body so that the buoyancy body is separated from the underwater ground by buoyancy and then towed to another position. Structure construction method using a floating floating body using the buoyancy and support reaction force included. 11. The buoyancy body according to claim 9 or 10, wherein a buoyancy control device is further installed in the inner space to provide a buoyancy control device including a water tank in which a buoyancy adjustment means including water is filled and discharged. Method of constructing a structure using a floating floating body using buoyancy and support reaction force further comprises the step of being separated from the underwater ground by the towing to another position. 10. The method for constructing a structure using a floating floating body using buoyancy and supporting reaction force according to claim 9, further comprising installing a buoyancy increasing means including a styropol having a specific gravity lower than water in the empty space formed inside. 10. The buoyancy and support of claim 9, further comprising: connecting one end to a fixture constructed on an underwater ground spaced apart from the floating float, and installing a wire to allow the other end to be disassembled to the floating float. Structure construction method using landing floating body using reaction force. The floating floating body using buoyancy and supporting reaction force of claim 9, further comprising installing an anchor or a pile body in the widening bottom portion so as to penetrate the inner surface of the widening bottom portion and extend downwardly to the underwater ground where the floating floating body is installed. Structure construction method using.

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