KR100925532B1 - Under water structure and method for constructing thereof - Google Patents

Abstract

The present invention is an underwater structure including a pier, located apart from the pier, the foundation pile is installed on the ground under the ground connected to each other, and located in the outer part or the entire portion of the pier, the upper part of the foundation pile The first uneven portion is formed to include a portion to include the first uneven portion, and the second uneven portion is formed to include a first uneven portion to correspond to the first uneven portion, and the inner portion and the first uneven portion of the second uneven portion are formed. A through hole penetrating an inner portion of the convex portion is formed and includes a connecting portion including reinforcing bars or PC steel wires in an upper portion of the convex portion of the second concave portion, and a foundation pile inserted into the through hole and connected to each other by placing concrete. And a fastening part and a reinforcing bar selectively connected to the well or formed with a connection groove included in a portion to surround the PC steel wire It provides an underwater structure comprising.

In addition, the present invention in the construction method of an underwater structure including a piers, positioned to be spaced apart from the piers, using a formwork to install the foundation piles connected to each other by placing concrete on the ground under the lower bed, and Located in the outer portion or the entire portion of the piers, using a formwork to form a first including the uneven portion to be fitted with the upper portion of the foundation pile, the second portion to correspond to the first uneven portion in the upper portion of the first uneven portion It is formed to include the uneven portion, including the through hole penetrating through the inner portion of the recessed portion of the second uneven portion and the inner portion of the convex portion of the first uneven portion, and comprises a reinforcement or PC steel wire in the upper portion of the convex portion of the second uneven portion Select the connection part installation step and the foundation pile installed by inserting it into the through hole to connect the concrete Fastening part installation step to fasten automatically, the installation step to form a well including a connecting groove in a portion by using a formwork to wrap the reinforcement or PC steel wire and the well is mounted to the connection by lifting the well with a crane, connecting the mortar Provided is a construction method of an underwater structure comprising a curing step of curing by injecting the inside of the groove.

Underwater structure, 1st uneven part, 2nd uneven part, fastening part

Description

Underwater structure and method for constructing

The present invention relates to an underwater structure and a construction method of the underwater structure, and more particularly, to improve the structure of the underwater structure and to reduce the construction cost or repair cost and minimize the scour phenomenon and to extend the life of the underwater structure and It relates to a construction method of underwater structures.

In general, bridges were underwater structures designed to cross rivers, straits and canals.

Here, the bridge was largely divided into a superstructure and a substructure. At this time, the upper structure of the bridge was a portion that directly supports the load of the vehicle was composed of the bottom surface and the mold, the lower structure of the bridge was composed of shifts, piers, etc. as a portion for supporting the upper structure.

In particular, since the pier part of the substructure of the bridge is in contact with water, the pier is affected by the impact of acidity, alkalinity, salinity, and collisions with sand and gravel moving through the flowing water.

In other words, sand and gravel, which floated with water from upstream, was blocked by the column, causing pressure, and the flow velocity increased.

In more detail, due to the continuous breakage of the bridge piers exposed to the reinforcement of the bottom of the bridge piers were corroded by the flowing water, including sand and gravel, and increased in volume.

After that, the flowing water, including sand and gravel, presses the concrete around the reinforcing bars, causing cracks in the concrete with weak tensile strength, thereby spreading the areas of corrosion and expansion while spreading between the other reinforcing bars. The result is a crushing phenomenon that eventually destroys the entire piers.

Therefore, in order to minimize the crushing phenomenon in recent years, the research on the well basin has been continuously improved so that the flowing water including sand and gravel does not come into direct contact with the pier.

In recent years, there has been a continuous research on an improved underwater structure to reduce the cost of repairing the aging well basin foundation.

In order to achieve the above object, the present invention is located in the underwater structure including a pier, located apart from the pier, the foundation pile is installed on the ground under the riverbed connected to each other, the outer portion or the entire portion of the pier However, the first uneven portion is formed to include a portion to fit with the upper portion of the foundation pile, and the second uneven portion is formed to include a second uneven portion to correspond to the first uneven portion in the upper portion of the first uneven portion, A through hole penetrating the inner portion and the inner portion of the convex portion of the first concave-convex portion is formed, and the upper portion of the convex portion of the second concave-convex portion includes a connection portion installed by including a reinforcing steel or PC steel wire, inserted into the through-hole and the concrete is poured Connecting groove to a part to surround the fastening part and rebar or PC steel wire which is selectively fastened with the foundation pile installed Includes a right bucket formed is included.

According to another feature of the invention, the well is characterized in that a portion of the outer shape is installed to have a curved surface in the inner or outer direction of the well.

According to another feature of the present invention, the reinforcing bars or PC steel wire is installed longer toward the center of the pier, the connection groove is characterized in that formed longer toward the center of the bridge to surround the reinforcement or PC steel wire.

According to another feature of the invention, the connecting portion is characterized in that the inner material is installed in stainless, the outer material is installed in concrete to surround the stainless.

According to another feature of the invention, the fastening portion is characterized in that the stainless material.

According to another feature of the present invention, in the construction method of an underwater structure including a pier, the base pile is positioned so as to be spaced apart from the pier, by installing concrete in the ground under the lower bed using the formwork to connect the foundation pile to each other In the installation step, and located in the outer portion or the entire portion of the piers, using a formwork to form a first including the uneven portion to be fitted with the upper portion of the foundation pile, and the first uneven portion and the upper portion of the first uneven portion A second uneven portion is formed to correspond to the second uneven portion, and includes a through hole penetrating through an inner portion of the uneven portion of the second uneven portion and an inner portion of the convex portion of the first uneven portion; Installation step of forming including PC steel wire and concrete installation by inserting through hole Install the fastening part to selectively fasten the foundation pile, the wells installation step to form the connection groove in the part by using the formwork to surround the reinforcement or PC steel wire, and the well bucket lifting the well to the connecting portion and And, it includes a curing step of curing by injecting the mortar into the connection groove.

According to another feature of the invention, the step of installing the well is characterized in that the step of installing a portion of the outer shape of the well to have a curved surface in the inner or outward direction of the well using the formwork.

According to another feature of the invention, the step of installing the connection step is to install the reinforcement or PC steel wire longer toward the center of the pier, forming a longer groove toward the center of the pier to surround the reinforcement or PC steel wire It is characterized by that.

According to another feature of the invention, the connecting portion installation step is characterized in that the step of installing the material of the inside of the connection portion of stainless steel, and the outside material of concrete so that the stainless steel is wrapped.

According to another feature of the invention, the fastening portion installation step is characterized in that the step of installing the fastening portion made of stainless steel.

According to the construction method of the underwater structure and the underwater structure of the present invention made as described above, the following effects can be obtained.

First, when replacing the foundation of the well that is aged due to the crushing phenomenon, it is possible to partially break the entire underwater structure without crushing to release only the damaged connection and replace it with a new connection, thereby reducing the repair cost. .

Secondly, since the well basin foundation is made to have a curved one-sided structure that can disperse the flow velocity, the scour phenomenon can be minimized, thereby extending the life of the underwater structure.

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

<First Embodiment>

1 is a cross-sectional view illustrating an underwater structure according to a first embodiment of the present invention, and FIG. 2 is a plan view showing an enlarged portion A of FIG.

1 and 2, the underwater structure 100 according to the first embodiment of the present invention is a pier 102, a foundation pile 104, a connecting portion 106, a fastening portion 108, a well bucket 110. ), Etc.

Pier 102 is installed in a cylinder to support the upper structure of the bridge, the foundation pile 104 is located apart from the bridge 102, concrete is installed on the ground under the lower bed is connected to each other.

The connecting portion 106 is located at the outer portion or the entire portion of the piers 102, and is installed to be selectively fitted by the upper portion of the foundation pile 104 and the fastening portion 108 to be described later.

More specifically, the connecting portion 106 includes a first uneven portion 106a, a second uneven portion 106b, a through hole 106c, a rebar 106d, and the like.

The first uneven portion 106a is formed in a portion so as to fit with the upper portion of the foundation pile 104, and the second uneven portion 106b is formed in the upper portion of the first uneven portion 106a by the first uneven portion 106a. It is formed to correspond to.

In other words, it is preferable that the concave-convex shape is alternately formed in the first concave-convex portion 106a and the second concave-convex portion 106b such that the fastening portion 108 to be described later is located.

At this time, the through hole 106c is formed to penetrate the inner portion of the recessed portion of the second uneven portion 106b and the inner portion of the convex portion of the first recessed portion 106a.

The reinforcing bar 106d is provided at an upper portion of the convex part of the second uneven part 106b. At this time, the reinforcing bars (106d) may be selectively installed to increase the number for efficient curing with the well (110) to be described later. However, in the present invention, the reinforcing bar 106d is not installed, and although not shown, a PC steel wire (not shown) may be installed.

On the other hand, the connecting portion 106 is installed in the material of the corrosion resistant stainless steel inside, the outside material is installed in concrete to surround the stainless steel. This is for preventing corrosion of the connection part 106, fastening property and curing with the foundation pile 104 efficiently.

The fastening part 108 is inserted into the through hole 106c and is installed to be selectively fastened with the foundation pile 104 installed with concrete in connection with each other.

At this time, the fastening part 108 is installed with a bolt made of stainless steel which is a corrosion resistant material. However, the present invention is not limited thereto, and the fastening part 108 may be any fastening means for fastening.

Well bin 110 is installed in a predetermined form to surround the reinforcing bars (106d) or PC steel wire (not shown), the connection groove 110a for embedding the reinforcing bars (106d) or PC steel wire (not shown) in a portion It is included and formed.

Here, a method of sequentially constructing the underwater structure according to the first embodiment of the present invention will be described with reference to FIGS. 3A to 3C.

3A to 3C are cross-sectional views illustrating a method of sequentially constructing an underwater structure according to the first embodiment of the present invention.

First, the method for sequentially constructing the underwater structure 100 according to the first embodiment of the present invention includes the pier installation step, the foundation pile installation step, the connection part installation step, the fastening part installation step, the well bucket installation step, curing step, etc. To perform.

Pier setting step is to install the pier 102 in the shape of a cylinder using a formwork (not shown).

Thereafter, as shown in Figure 3a, the foundation pile installation step is positioned so as to be spaced apart from the pier 102, using a formwork (not shown) to cast concrete on the ground under the lower bed to connect the foundation pile 104 to each other Install.

At this time, the head of the constructed foundation pile 104 is arranged and concrete is poured so that the head of the foundation pile 104 is exposed.

Afterwards, as shown in FIG. 3B, the connecting part installation step may be located at the outer part or the entire part of the piers 102, and may be formed at the part to be fitted with the upper part of the foundation pile 104 using formwork (not shown). The first uneven portion 106a is formed, and the second uneven portion 106b is formed on the upper portion of the first uneven portion 106a so as to correspond to the first uneven portion 106a.

At this time, it is preferable to alternately form the uneven shape so that the fastening portion 108 to be described later is located in the first uneven portion 106a and the second uneven portion 106b.

Thereafter, the connecting portion installation step is formed by including a through hole 106c penetrating the inner portion of the recessed portion of the second uneven portion 106b and the inner portion of the convex portion of the first uneven portion 106a, and the second uneven portion Reinforcing bars 106d are included in the upper portion of the convex portion 106b.

In this case, the present invention may not be provided with the reinforcing bars 106d, but may be provided with a PC steel wire (not shown).

On the other hand, the connecting portion 106 is formed of stainless steel, which is a corrosion-resistant material, and is installed in concrete to surround the stainless steel. This is to prevent corrosion of the connecting portion 106 and to maintain fastening and curing of the foundation pile 104 efficiently.

That is, the connecting portion including the reinforcing bars 106d, the first uneven portion 106a, the second uneven portion 106b, and the through hole 106c by using a feed line in a portion where the foundation piles 104 are connected to each other by concrete. Construct (106).

Thereafter, when the formwork (not shown) construction is completed, the concrete is poured to surround the connecting portion 106 made of stainless steel.

After that, as shown in Figure 3c fastening unit installation step is inserted into the through-hole (106c) is installed so as to selectively fasten with the foundation pile 104, which is poured concrete and connected to each other.

At this time, the fastening part 108 is installed in a stainless material which is a corrosion resistant material. However, the present invention is not limited thereto, and the fastening part 108 may be any fastening means for fastening.

Here, the fastening part installation step is a bolt, that is, the fastening portion 108 between the foundation pile 104 by using the through-hole 106c formed in the connection portion 106 after the concrete curing period of the connection portion 106 described above )

As such, the installation step of the fastening portion of the underwater structure 100 according to the first embodiment of the present invention, when replacing the base of the well well 110 is aged by crushing phenomenon, the whole of the underwater structure with a crusher (not shown) Without crushing, partially crushed to release only the damaged connection 106 and replace with a new connection 106, to reduce the cost of repair.

Thereafter, the well installation step is formed in a predetermined shape so as to surround the reinforcing bars (106d) or PC steel wire (not shown) by using a formwork (not shown), a portion of the reinforcing bars (106d) or PC steel wire (not shown) Lifting the well bucket 110, including the connection groove (110a) for embedding the to a crane (not shown) is mounted on the connection portion 106.

Finally, the curing step injects the mortar into the connection groove 110a to firmly cure the well 110 and the connection portion 106.

As described above, the construction method of the underwater structure and the underwater structure according to the first embodiment of the present invention, when replacing the foundation of the well tank 110 aging due to the crushing phenomenon, partially crushed without crushing the entire underwater structure By releasing only the damaged connection 106 and can be replaced with a new connection 106, it is possible to reduce the maintenance cost.

Second Embodiment

4 is a cross-sectional view illustrating an underwater structure according to a second embodiment of the present invention, and FIG. 5 is a plan view showing the portion B of FIG. 4 enlarged but cut in the direction of Y to Y '.

4 and 5, the underwater structure 400 according to the second embodiment of the present invention is the same as the underwater structure 100 according to the first embodiment, the pier 102, the foundation pile 104, and the fastening. Section 108 and the like.

As such, the functions of the respective components of the underwater structure 400 according to the second embodiment of the present invention and the organic relationship therebetween are the functions of the respective components of the underwater structure 100 according to the first embodiment. And the organic relations between them, so the description of each of them will be omitted below.

However, in the underwater structure 400 according to the second embodiment of the present invention, the structure of the connection part 406 is different from that of the well 410.

That is, the underwater structure 400 according to the second embodiment of the present invention is further installed as a structure for minimizing the scour phenomenon.

Here, the crushing phenomenon is the sand and gravel floating down with the water from the upstream is blocked by the pillar (102) column including the foundation (reinforcement foundation, well vent foundation, etc.), pressure is generated and the flow velocity is faster the lower piers (102) Continuously hit the phosphorus foundation (rebar foundation, well well foundation, etc.) refers to a phenomenon that eventually breaks the bridge (102).

In more detail, when the reinforcement of the lower portion of the bridge 102 is exposed due to the breakage of the continuous foundation (rebar foundation, well ventilation foundation, etc.), the corrosion is caused by the flowing water including sand and gravel, and the volume increases.

Afterwards, the flowing water including sand and gravel presses the concrete around the reinforcing bars, causing cracks in the concrete with weak tensile strength, thereby widening the areas of corrosion and expansion while spreading between the other reinforcing bars, and the pier 102. This increases the volume of its own and eventually creates a crushing phenomenon that destroys the entire piers 102.

Therefore, the underwater structure 100 according to the first embodiment of the present invention, since the base of the well 110 is made of a cylinder in the same shape as the bridge 102, the base of the well 110 is sand and gravel, etc. When hit with running water, including a greater pressure can be attacked by the subsoil.

Accordingly, the underwater structure 400 according to the second embodiment of the present invention is designed to minimize the crushing of the riverbed around the bridge 102 by improving the underwater structure 100 according to the first embodiment.

In other words, the well 410 is installed so that a portion of the contour has a curved surface in the inner direction of the well 410. At this time, the well 410 is preferably manufactured in the form of a shoe, but the present invention is not limited to this, it is possible to be manufactured to have a structure of a curved one surface to disperse the flow rate.

In addition, the reinforcing bar 406d or PC steel wire (not shown) of the connecting portion 406 is installed longer toward the center of the bridge 102, the connecting groove 410a is a reinforcing bar 406d or PC steel wire (not shown) It is formed longer toward the central portion of the piers 102 to surround the.

Here, a method of sequentially constructing the underwater structure according to the second embodiment of the present invention will be described with reference to FIGS. 6A to 6C.

6A to 6C are cross-sectional views illustrating a method of sequentially constructing an underwater structure according to a second embodiment of the present invention.

First, as shown in FIG. 6A, the method of sequentially constructing the underwater structure 400 according to the second embodiment of the present invention is the same as the underwater structure 100 according to the first embodiment. Perform the installation steps.

Such a method of sequentially constructing the underwater structure 400 according to the second embodiment of the present invention is the same as the method of sequentially constructing the underwater structure 100 according to the first embodiment, and thus, each additional part thereof is described. Descriptions will be omitted below.

However, unlike the construction method of the underwater structure 100 according to the first embodiment, the method of sequentially constructing the underwater structure 400 according to the second embodiment of the present invention provides a connection part installation step, a fastening part installation step, and a right. Carry out bucket installation and curing steps.

As shown in Figure 6b, the connecting portion installation step is located in the outer portion or the entire portion of the pier 102, the first unevenness in the portion to be fitted with the upper portion of the foundation pile 104 using a formwork (not shown) A portion 106a is formed, and a second uneven portion 106b is formed on the upper portion of the first uneven portion 106a so as to correspond to the first uneven portion 106a.

At this time, it is preferable to alternately form the uneven shape so that the fastening portion 108 to be described later is located in the first uneven portion 106a and the second uneven portion 106b.

Thereafter, the connecting portion installation step is formed by including a through hole 106c penetrating the inner portion of the recessed portion of the second uneven portion 106b and the inner portion of the convex portion of the first uneven portion 106a, and the second uneven portion Reinforcing bars 406d are included in the upper portion of the convex portion 106b.

At this time, the present invention is installed longer than the reinforcing bar 406d or PC steel wire (not shown) of the connecting portion 406 toward the central portion of the bridge (102).

On the other hand, the connecting portion 406 is installed in the material of the corrosion resistant stainless steel inside, and the outside material is installed in concrete to surround the stainless steel. This is to prevent corrosion of the connecting portion 406 and fastenability and curing of the foundation pile 104 efficiently.

That is, the foundation piles 104 are connected to each other by concrete, and the connection part 406 made of stainless steel is placed on the reinforcing bar 406d and the first uneven part 106a and the second uneven part 106b by using a wire. After connecting the connecting portion 406 including the through hole 106c according to the design, formwork (not shown) is constructed.

Thereafter, when the formwork (not shown) construction is completed, the concrete is poured to surround the connecting portion 406 made of stainless steel.

Thereafter, as shown in Figure 6c fastening unit installation step is inserted into the through-hole (106c) is installed so as to selectively fasten with the foundation pile 104, which is poured concrete installed and connected to each other.

Since the fastening part installation step according to the second embodiment of the present invention is the same as the fastening part installation step according to the first embodiment, further description of the construction method for this will be omitted below.

Thereafter, the well installation step is formed in a predetermined shape so as to surround the reinforcing bars (106d) or PC steel wire (not shown) by using a formwork (not shown), a portion of the reinforcing bars (106d) or PC steel wire (not shown) Lifting the well bucket 110, including the connection groove (110a) for embedding the to a crane (not shown) is mounted on the connection portion 106.

At this time, using a formwork (not shown) is installed so that a portion of the outer shape of the well 410 is bent in the inner direction of the well 410. Such, it is preferable to manufacture the well 410 in the form of a shoe, but the present invention is not limited to this, it is possible only to manufacture to have a curved one-sided structure that can disperse the flow rate.

In addition, the connection groove 410a is formed longer toward the central portion of the piers 102 to surround the rebar (406d) or PC steel wire (not shown).

Finally, the curing step injects the mortar into the connection groove 410a to solidify the well bucket 410 and the connection portion 406.

As such, the construction method of the underwater structure and the underwater structure according to the second embodiment of the present invention is manufactured to have a curved one surface structure that can disperse the flow rate of the well bucket 410, it is possible to minimize the crushing phenomenon This can extend the life of the underwater structure.

In addition, the construction method of the underwater structure and the underwater structure according to the second embodiment of the present invention is the same as the construction method of the underwater structure and the underwater structure according to the first embodiment based on the well bucket 410 aged by crushing phenomenon At the time of replacement, the entire submerged structure can be partially crushed without crushing, thereby releasing only the damaged connection part 406 and replacing it with a new connection part 406, thereby reducing maintenance costs.

On the other hand, using the formwork (not shown) of the well of the underwater structure can be installed only on one side of the piers facing the flow direction. Looking at the construction method of the underwater structure and the underwater structure of the present invention, as shown in Figs.

Third Embodiment

7 is a cross-sectional view showing an underwater structure according to a third embodiment of the present invention, Figures 8 and 9 are a side view and a plan view of the underwater structure according to a third embodiment of the present invention.

First, the construction method of the underwater structure 700 and the underwater structure according to the third embodiment of the present invention is the same as the construction method of the underwater structure (100, 400) and the underwater structure according to the first and second embodiments.

7 to 9, the underwater structure 700 according to the third embodiment of the present invention is the same as the underwater structure 100 and 400 according to the first and second embodiments, the pier 102 and the foundation pile ( 104, fasteners 108, connectors 106, 406, and the like.

As such, the function of each of the components of the underwater structure 700 according to the third embodiment of the present invention and the organic relationship therebetween are described in detail with respect to the underwater structures 100 and 400 according to the first and second embodiments. Since the functions of the components and the organic relationship between them are the same, each description thereof will be omitted below.

However, the underwater structure 700 according to the third embodiment of the present invention has a different structure of the well bucket 710.

That is, the underwater structure 700 according to the third embodiment of the present invention is further installed as a structure for minimizing the scour phenomenon while considering the construction cost of the underwater structure 700.

In more detail, using the formwork (not shown) of the wells 710, the external shape of the wells 710 is provided only on one side of the pier 102 facing the flow direction. At this time, a portion of the external shape of the well 710 is preferably installed to have a curved surface in the outward direction.

As such, the construction method of the underwater structure and the underwater structure according to the third embodiment of the present invention is manufactured to have a curved one-side structure that can further disperse the flow rate of the well bucket 710, further minimizing the scour phenomenon This can extend the life of the underwater structure.

In addition, the construction method of the underwater structure and the underwater structure according to the third embodiment of the present invention is the same as the construction method of the underwater structure and the underwater structure according to the first and second embodiment of the well bucket 110, aged by the scour phenomenon 410) When replacing the foundation, it is possible to partially break without breaking the entire underwater structure, thereby releasing only the damaged connections 106 and 406 and replacing them with new ones 106 and 406, thereby reducing maintenance costs. .

Those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

1 is a cross-sectional view showing an underwater structure according to the first embodiment of the present invention.

FIG. 2 is a plan view showing the portion A of FIG. 1 enlarged but cut in the X to X 'directions. FIG.

3a to 3c is a cross-sectional view showing a method for sequentially constructing the underwater structure according to the first embodiment of the present invention.

4 is a cross-sectional view showing an underwater structure according to a second embodiment of the present invention.

FIG. 5 is an enlarged plan view of a portion B of FIG. 4, taken in a Y to Y 'direction.

6a to 6c is a cross-sectional view showing a method for sequentially constructing an underwater structure according to a second embodiment of the present invention.

7 is a cross-sectional view showing an underwater structure according to a third embodiment of the present invention.

8 is a side view showing an underwater structure according to a third embodiment of the present invention.

9 is a plan view showing an underwater structure according to a third embodiment of the present invention.

* Description of the main parts of the drawings *

100, 400, 700: underwater structure 102: pier

104: Basic file 106, 406: Connection part

106a: 1st uneven part 106b: 2nd uneven part

106c: Through hole 106d, 406d: Reinforcing bar

108: fastening portion 110, 410, 710: well

110a, 410a: Connecting groove

Claims (10)

In an underwater structure comprising a pier, A base pile positioned to be spaced apart from the piers and installed on the ground under the lower bed and connected to each other; Located in the outer portion or the entire portion of the pier, the first uneven portion is formed to include a portion to be fitted with the upper portion of the foundation pile, the second portion so as to correspond to the first uneven portion in the upper portion of the first uneven portion It is formed to include the uneven portion, and includes a through hole penetrating through the inner portion of the concave portion of the second concave-convex portion and the inner portion of the convex portion of the first concave-convex portion, the reinforcement or PC A connection part including a steel wire installed therein; A fastening part inserted into the through hole and selectively fastened to the foundation pile installed by connecting the concrete with the concrete; And Underwater structure comprising a well formed by including a connection groove in a portion to surround the reinforcement or the PC steel wire. The method of claim 1, The well is an underwater structure, characterized in that a portion of the outer shape is installed to have a curved surface in the inner or outward direction of the well. The method of claim 1, The reinforcing bar or the PC steel wire is installed longer toward the central portion of the pier, the connecting groove is formed in the underwater structure characterized in that the longer to the center portion of the pier to surround the reinforcement or the PC steel wire. The method of claim 1, The connecting portion is an inner material is installed in stainless, the outer material is an underwater structure, characterized in that installed in concrete to surround the stainless. The method of claim 1, The fastening part is an underwater structure, characterized in that the stainless material. In the construction method of an underwater structure including a pier, A foundation pile installation step of placing the foundation piles apart from the piers and installing foundation piles by placing concrete on the ground under the bed using formwork; Located on the outer portion or the entire portion of the pier, and formed by including a first uneven portion in a portion to be fitted with the upper portion of the foundation pile using a formwork, and the first uneven portion in the upper portion of the first uneven portion A second uneven portion is formed to correspond to the second uneven portion, and includes a through hole penetrating an inner portion of the uneven portion of the second uneven portion and an inner portion of the convex portion of the first uneven portion, and an upper portion of the uneven portion of the second uneven portion. A connecting part installation step including forming reinforcing bars or PC steel wires; A fastening part installation step of selectively inserting the foundation piles connected to each other by placing the concrete in the through-holes; An installation step of forming a well bucket including a connection groove in a portion so as to surround the reinforcement or the PC steel wire using a formwork, and lifting the well bucket with a crane to mount the connection portion; And Construction method for an underwater structure comprising a curing step of curing by injecting mortar into the connection groove. The method of claim 6, The well installation step, The installation method of the underwater structure, characterized in that the step of installing a portion of the outer shape of the well to have a curved surface in the inner or outer direction of the well using a formwork. The method of claim 6, The connecting unit installation step, And installing the reinforcing bar or the PC steel wire longer toward the center portion of the pier, and forming the connecting groove longer toward the center portion of the pier so as to surround the reinforcing bar or the PC steel wire. Construction method of underwater structure. The method of claim 6, The connecting unit installation step, The installation method of the underwater structure, characterized in that the step of installing the material of the inside of the connection portion of stainless, and the external material of concrete so that the stainless steel is wrapped. The method of claim 6, The fastening unit installation step, Construction method of the underwater structure, characterized in that the step of installing the fastening portion made of stainless material.

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