KR102310126B1 - Method of constructing underwater concrete block structure - Google Patents

Abstract

The present invention suggests a method of constructing an underwater concrete block structure by a first concrete block production step, a guide pole preparation step, a guide pole installation step, a first concrete block installation step, a second concrete block production step, a second concrete block installation step, a drainage step, a guide pole removal step, and a concrete column formation step. Thereby, the concrete column and the first concrete block can be more firmly coupled through a reinforcing bar assembly for the column.

Description

Underwater concrete block structure construction method {METHOD OF CONSTRUCTING UNDERWATER CONCRETE BLOCK STRUCTURE}

The present invention relates to a construction method of an underwater concrete block structure installed in the sea or riverside for various purposes such as berthing facilities for ports, etc., structures for sofas installed on the shore, breakwaters, and the like.

Underwater structures are installed in the water for various purposes, such as berthing facilities for ports, etc., structures for sofas installed on the shore, and breakwaters. In the above and below, the underwater structure means that the lower part of the underwater structure is installed in a submerged state, and the upper part of the underwater structure may protrude above the water surface or be located below the water surface.

A widely known construction technique in the construction of underwater structures is the large caisson method. The large caisson method has the advantage of being able to withstand large waves, but it requires a lot of transportation and construction costs because a large caisson with a very large structure must be manufactured on land, transported to the installation point, and then installed in the water. there are many

In order to solve the problem of such a large caisson method, a method of forming an underwater structure by stacking small concrete blocks in several stages according to the water depth is known.

The present inventor proposes Republic of Korea Patent Registration No. 10-1355805 "Construction method for underwater concrete block structure and underwater concrete block structure" (registration on January 15, 2014) to form a concrete column inside the waterproofing membrane, and Therefore, we proposed a technology that allows the concrete block of the upper part and the concrete block of the lower part to have structural integrity, so that the underwater concrete block structure can have sufficient structural stability even in waves caused by a large typhoon.

The present invention is proposed to further improve the prior art.

Republic of Korea Patent Registration No. 10-1355805 "Underwater Concrete Block Structure Construction Method and Underwater Concrete Block Structure" (Registered on January 15, 2014) Republic of Korea Patent Registration No. 10-2022339 "Construction Method of Underwater Concrete Block Structure" (Registered on September 10, 2019)

The present invention has been devised to solve the problems of the prior art as described above, does not require a waterproofing membrane, and the concrete column and the first concrete block can be more firmly combined through the reinforcing bar assembly for the column underwater concrete block We would like to propose a method of constructing a structure.

In order to solve the above problems, the present invention provides a first concrete block body and a reinforcing bar assembly for columns extending vertically upward from the lower end connected to the inside of the first concrete block body and protruding to the upper part of the first concrete block body and a plurality of coupling bolts extending vertically upward from the lower end connected to the interior of the first concrete block body, protruding from the upper portion of the first concrete block body, and disposed in a form to surround the reinforcing bar assembly for the column and the first A first concrete block manufacturing step of manufacturing a first concrete block comprising a first watertight packing disposed in a form to enclose the reinforcing bar assembly for the column and the plurality of coupling bolts on the upper surface of the concrete block body; A guide pole comprising a bottom plate having a reinforcing bar assembly through-hole formed in the center and having a plurality of bolt through-holes formed to surround the reinforcing bar assembly through-hole, and a guide pipe extending in an upward direction from the edge of the bottom plate guide pole preparation steps; After the first concrete block manufacturing step and the guide pole preparation step, the reinforcing bar assembly for the pillar and the plurality of coupling bolts are respectively inserted into the reinforcing bar assembly through-hole and the plurality of bolt through-holes of the bottom plate of the guide pole. A guide pole installation step of fastening a nut to the upper end of the coupling bolt to install the guide pole on the upper portion of the first concrete block; a first concrete block installation step of installing the first concrete block in water after the guide pole installation step; a second concrete block manufacturing step of manufacturing a second concrete block including a second concrete block body having a through hole extending in the vertical direction; After the second concrete block manufacturing step and the first concrete block installation step, the second concrete block is installed on top of the first concrete block so that the guide pole is inserted into the through hole of the second concrete block. An assembly is formed, but a through-hole for a concrete column whose lower end is blocked in the concrete block assembly is formed by the through-hole of the second concrete block and the first concrete block, and the first watertight packing includes the first concrete block and a second concrete block installation step positioned between the second concrete blocks to block the inflow of water from the outside into the through-hole for the concrete column; After the second concrete block installation step, a drainage step of removing the water inside the through-hole for the concrete column; after the draining step, a guide pawl removal step of releasing the fastening of the nut and removing the guide pawl; After the step of removing the guide pole, the concrete pillar forming step of pouring concrete into the through-hole for the concrete pillar to form a concrete pillar in which the reinforcing bar assembly for the pillar and the poured concrete are integrated into the through-hole for the concrete pillar; It is characterized in that it includes.

In the above, it is preferable that a third watertight packing is provided in a form surrounding the reinforcing bar assembly through-hole and the plurality of bolt through-holes under the bottom plate of the guide pole.

In the above: the guide pawl, is detachably coupled to the upper end of the guide pipe and includes an upper insertion guide portion having an upwardly tapered shape; a nut fastener guide passage extending vertically on the inner circumferential surface of the guide pipe and positioned above the bolt through hole; can be

In the above: a drain pipe extending in the vertical direction is provided inside the guide pole, and the lower end of the drain pipe communicates with the outside through a drain hole formed in the lower end of the guide pipe; In the draining step, removing the water inside the through-hole for the concrete column using the drain pipe; This is preferable.

In the above: the reinforcing bar assembly for the column has a length that can protrude beyond the through-hole for the concrete column to the upper portion of the through-port for the concrete column; After the step of forming the concrete column, the step of forming the standing concrete on the upper part of the concrete block assembly, and the upper end of the reinforcing bar assembly for the column being connected to the inside of the standing concrete is added; This is preferable.

In the above: A second watertight packing is provided on the upper surface of the second concrete block body to surround the through hole; In the second concrete block installation step, a plurality of second concrete blocks are installed on top of the first concrete block in multiple stages, and the second watertight packing is located between the second concrete blocks installed adjacent to each other vertically to block the inflow of water from the outside to the through-hole for the concrete column; This is preferable.

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As described above, the present invention does not require a waterproofing membrane, can form a concrete column in the same way as in a land environment, and the concrete column and the first concrete block can be more firmly coupled through the reinforcing bar assembly for the column.

1 to 13 are views sequentially showing a method of constructing an underwater concrete block structure according to a first embodiment of the present invention;
14 is a perspective view of the first concrete block of FIG. 1;
15 is a cross-sectional view of the guide pole of FIG. 5;
16 is a cross-sectional view taken along line AA of FIG. 15;
17 is a perspective view of the guide pole of FIG. 15 viewed from the bottom;
18 is a perspective view of the second concrete block of FIG. 7;
19 is a cross-sectional view showing a state in which the concrete block assembly of FIG. 7 is continuously arranged in the horizontal direction;
20 is a cross-sectional view of an underwater concrete block structure according to a second embodiment of the present invention;
21 is a cross-sectional view of an underwater concrete block structure according to a third embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily carry out the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are given to similar parts throughout the specification.

Throughout the specification, when a part "includes" a certain element, it means that other elements may be further included, rather than excluding other elements, unless otherwise stated.

First, the construction method of the underwater concrete block structure according to the first embodiment of the present invention will be described.

1 to 13 are views sequentially illustrating a method for constructing an underwater concrete block structure according to a first embodiment of the present invention, FIG. 14 is a perspective view of the first concrete block of FIG. 1, and FIG. 15 is a guide of FIG. It is a cross-sectional view of the pole, Figure 16 is a cross-sectional view AA reference of Figure 15, Figure 17 is a perspective view of the guide pole of Figure 15 viewed from the bottom, Figure 18 is a perspective view of the second concrete block of Figure 7, Figure 19 is Figure 7 It is a cross-sectional view showing the state in which the concrete block aggregates of

(1) First concrete block manufacturing step

In this embodiment, the first concrete block manufacturing step proceeds in the order of FIGS. 1 and 2 .

First, the first concrete block 110 as shown in FIGS. 1 and 14 is manufactured.

The first concrete block 110 includes a first concrete block body 111 having a rectangular parallelepiped shape as shown in FIG. 14 .

The first concrete block body 111, a preliminary reinforcing bar assembly 112-1, a coupling bolt 113, and a first watertight packing 114 are provided.

In this embodiment, two preliminary reinforcing bar assemblies 112-1 are provided, and a first watertight packing 114 and a plurality of coupling bolts 113 are provided for each preliminary reinforcing bar assembly 112-1.

The preliminary reinforcing bar assembly 112-1 has its lower end connected to the inside of the first concrete block body 111 (specifically, the inner reinforcing bar of the first concrete block body 111), and extends upward in the vertical direction from the lower end. It protrudes to the upper part of the first concrete block body 111 .

As shown in FIG. 2 , the extension reinforcing bar assembly 112-2 is connected to the preliminary reinforcing bar assembly 112-1, and the extended reinforcing bar assembly 112-2 is connected to the preliminary reinforcing bar assembly 112-1, as shown in FIG. ) is achieved.

A plurality of coupling bolts 113 are arranged in a form to surround the preliminary reinforcing bar assembly (112-1).

The lower end of the coupling bolt 113 is connected to the inside of the first concrete block body 111 , and extends vertically upward from the lower end to protrude upward of the first concrete block body 111 .

A first packing groove 111a is formed on the upper surface of the first concrete block body 111, and a first watertight packing 114 is provided in the first packing groove 111a.

The first packing groove 111a and the first watertight packing 114 are formed in a square ring shape surrounding the preliminary reinforcing bar assembly 112-1 and the plurality of coupling bolts 113 .

After manufacturing the first concrete block 110 as shown in FIG. 1 , as shown in FIG. 2 , the extension reinforcement assembly 112-2 is connected to the preliminary reinforcement assembly 112-1 to manufacture the first concrete block 110 . complete

Accordingly, the first concrete block 110 includes a first concrete block body 111 , a reinforcing bar assembly 112 for a column, a coupling bolt 113 , and a first watertight packing 114 .

(2) Guide pole installation step

After the first concrete block manufacturing step, the guide pole 130 is detachably coupled to the coupling bolt 113 of the first concrete block 110 as shown in FIGS. 3 to 5 .

As shown in FIGS. 15 to 17, the guide pole 130 includes a guide pipe 131, an upper insertion guide 132, a bottom plate 133, and a third watertight packing 134 and , a drain pipe 135 and a nut fastener guide passage 136 .

The bottom plate 133 is in the form of a square plate, the reinforcing bar assembly through-holes 133a are formed in the center, and a plurality of bolt through-holes 133b are formed to surround the reinforcing bar assembly through-holes 133a.

The reinforcing bar assembly through-hole 133a is a portion for the reinforcing bar assembly 112 for a column to be inserted through, and the bolt through-hole 133b is a portion for the coupling bolt 113 to be inserted through.

Therefore, the arrangement of the reinforcing bar assembly through-hole 133a and the plurality of bolt through-holes 133b of the bottom plate 133 corresponds to the arrangement of the reinforcing bar assembly 112 and the plurality of coupling bolts 1130 for the column.

The guide pipe 131 has a shape of a square pipe extending upwardly from the edge of the bottom plate 133 , and a hollow extending in the vertical direction is formed along the inside thereof.

A drain hole 131a is formed at the lower end of the guide pipe 131 .

The upper insertion guide 132 has a shape tapered upward to the upper end of the guide pipe 131 .

The upper insertion guide 132 is detachably coupled to the guide pipe 131, and the lower end of the upper insertion guide 132 has a guide protrusion 132a to be inserted into the upper end of the guide pipe 131. is formed.

The upper insertion guide 132 is for guiding the installation of the second concrete block 120 to be described later.

The third watertight packing 134 is provided under the bottom plate 133 , and the third watertight packing 134 is to block the inflow of water into the guide pole 130 from the outside.

To this end, the third watertight packing 134 has a rectangular ring shape surrounding the reinforcing bar assembly through-holes 133a and the plurality of bolt through-holes 133b.

The drain pipe 135 is a pipe extending in the vertical direction inside the guide pole 130, and the lower end of the drain pipe 135 communicates with the outside through a drain hole 131a formed at the lower end of the guide pipe 131, and the drain pipe The upper end of the 135 extends to the upper end of the guide pipe 131 .

In this embodiment, the drain pipe 135 is in close contact with the inner circumferential surface of the guide pipe 131 and extends in the vertical direction.

A plurality of nut fastener guide passages 136 extending in the vertical direction are formed on the inner circumferential surface of the guide pipe 131 .

Each nut fastener guide passage 136 is located above the bolt through hole 133b.

Such a nut fastener guide passage 136 guides the nut fastener 138 to be inserted in the vertical direction, and fastens the nut 137 to the coupling bolt 113 with the nut fastener 138, or the coupling bolt ( 113) is to loosen the nut 137 fastened to.

First, as shown in FIG. 3 , the guide pole 130 in a state in which the upper insertion guide 132 is not coupled is installed in the first concrete block 110 .

Accordingly, the reinforcing bar assembly 112 and the plurality of coupling bolts 113 for the column are inserted into the reinforcing bar assembly through-holes 133a and the plurality of bolt through-holes 133b of the bottom plate 133 of the guide pole 130 .

Next, as shown in FIG. 4, a nut fastener 138 having a nut 137 mounted thereon is inserted vertically downward through the nut fastener guide passage 136, and then rotated to connect the nut 137 to the coupling bolt 113. ), and then detach the nut fastener 138 in the vertical direction upward.

When the nut 137 is fastened to the coupling bolt 113 protruding to the upper portion of the bottom plate 133 , the third watertight packing 134 is in close contact with the first concrete block 110 and the guide pole 130 from the outside. It is possible to block the inflow of water into the interior.

After the nut 137 is fastened as shown in FIG. 4 , the installation of the guide pole 130 is completed by coupling the upper insertion guide 132 to the guide pipe 131 as shown in FIG. 5 .

When the guide pole 130 is coupled to the coupling bolt 113 on land as shown in FIG. 5 , the first concrete block 110 is in a state in which it can be installed in water.

(3) First concrete block installation step

After the guide pole 130 is installed on the first concrete block 110 as shown in FIG. 5 , the first concrete block 110 is installed in water as shown in FIG. 6 .

As shown in FIG. 6 , the third watertight packing 134 is in close contact with the first concrete block 110 to prevent water from flowing into the guide pole 130 .

In addition, the upper end of the guide pole 130 is protruding from the water surface.

Therefore, in this embodiment, the reinforcing bar assembly 112 for a column is in a state not in contact with seawater by the guide pole 130, and there is no risk that the reinforcing bar assembly 112 for a column is corroded due to contact with seawater.

(4) Second concrete block manufacturing step

A second concrete block 120 is manufactured.

The second concrete block 120 includes a second concrete block body 121, and the second concrete block body 121 has a rectangular parallelepiped shape as shown in FIG. 18 and has two through-holes extending in the vertical direction ( 121b) is formed.

The cross-sectional shape of the through hole 121b is a rectangular cross-sectional shape corresponding to the cross-sectional shape of the guide pipe 131 , and the cross-sectional area of the through hole 121b is larger than that of the guide pipe 131 .

The cross-sectional shape of the through hole 121b may be a polygonal shape, and in this case, the guide pipe 131 should also have a polygonal cross-sectional shape.

A second watertight packing 124 is provided corresponding to each of the through holes 121b of the second concrete block body 121 .

A second packing groove 121a is formed on the upper surface of the second concrete block body 121, and a second watertight packing 124 is provided in the second packing groove 121a.

The second packing groove 121a and the second watertight packing 124 are formed in a ring shape surrounding the through hole 121b.

(5) Second concrete block installation step

After the second concrete block manufacturing step and the first concrete block installation step, the second concrete block 120 is installed on the upper portion of the first concrete block 110 as shown in FIG. 7 to form the concrete block assembly 100A.

The second concrete block 120 is installed so that the reinforcing bar assembly 112 for the column of the first concrete block 110 installed in water is inserted into the through hole 121b of the second concrete block 120 as shown in FIG. 7 .

More specifically, the second concrete block 120 is lowered from the top to the bottom so that the guide pole 130 installed in the first concrete block 110 is inserted into the through hole 121b of the second concrete block 120 . make it

At this time, the upper insertion guide 132 of the guide pole 130 guides the seating position of the second concrete block 120 while being easily inserted into the through hole 121b of the second concrete block 120 .

Such a process is described in more detail in Republic of Korea Patent Registration No. 10-2022339 "Underwater Concrete Block Structure Construction Method" (registered on September 10, 2019), which is incorporated herein.

As shown in FIG. 7 , a plurality of second concrete blocks 120 are installed on the upper portion of the first concrete block 110 in multiple stages, or in another embodiment (see FIG. 20 ), the upper portion of the first concrete block 110 . It will be possible to install the second concrete block 120 to one end.

In this way, in the concrete block assembly 100A formed according to the installation of the second concrete block 120 , a through-hole 140 for a concrete column with a closed lower end is formed.

The through hole 140 for a concrete column is formed by the through hole 121b of the second concrete block 120 and the first concrete block 110 .

In the concrete block assembly 100A, the first watertight packing 114 is located between the first concrete block body 111 and the second concrete block body 121, and the water inflow into the through-hole 140 for the concrete column from the outside. will block

In the concrete block assembly 100A, the second watertight packing 124 is positioned between the second concrete block bodies 121 disposed vertically to block the inflow of water into the through-hole 140 for the concrete column from the outside.

That is, in the concrete block assembly 100A, water is present in the through-hole 140 for a concrete column, but no water is present inside the guide pole 130 , and water exists only in the outer space of the guide pole 130 , and also By the first watertight packing 114 and the second watertight packing 124 , water cannot be introduced into the through-hole 140 for the concrete column.

19, in the concrete block assembly 100A, a plurality of first concrete blocks 110 are continuously arranged in a horizontal direction, and a plurality of second concrete blocks 120 are continuously arranged in a horizontal direction. is in a state of being

(6) Drainage step

After the second concrete block installation step, as shown in FIGS. 8 and 9 , a drainage step of removing water inside the through-hole 140 for a concrete column is performed.

First, as shown in FIG. 8 , the upper insertion guide 132 of the guide pole 130 is removed. Accordingly, the drain pipe 135 is exposed to the outside.

Next, as shown in FIG. 9 , the drain device 150 including the drain pump 151 is connected to the upper end of the drain pipe 135 , and by the operation of the drain pump 151, the Water is discharged to the outside through the drain pipe 135 and the drain device 150 .

On the other hand, since water cannot be introduced into the through-hole 140 for concrete pillars from the outside by the first watertight packing 114 and the second watertight packing 124, by this step, the 140) becomes a state without water.

In this embodiment, only the water in the outer space of the guide pole 130 is drained from the inside of the through-port 140 for the concrete column, and the drainage time is very saved.

(7) Guide pawl removal step

After the draining step, a guide pawl removal step of removing the guide pawl 130 is performed as shown in FIGS. 10 and 11 .

First, as shown in FIG. 10, the nut fastener 138 is lowered along the nut fastener guide passage 136 and rotated to loosen the nut 137 coupled to the coupling bolt 113, the nut fastener 138 and the nut (137) is removed by moving upward along the nut fastener guide passage (136).

After removing the nut 137 as described above, the guide pawl 130 is removed by separating the guide pawl 130 upward as shown in FIG. 11 .

(8) Concrete column formation stage

After the guide pole removal step, concrete 161 is poured into the through-hole 140 for a concrete column as shown in FIG. A concrete column 160 integrated with the coupling bolt 113 is formed.

At this time, there is no water in the through-hole 140 for the concrete column, and there is also no risk of concrete leaking to the outside by the first watertight packing 114 and the second watertight packing 124 , so there is no separate waterproofing no need to block

That is, the pouring operation of the concrete 161 may be performed in the same environment as on land.

On the other hand, the upper end of the reinforcing bar assembly 112 for a column does not form the concrete column 160, but protrudes above the concrete column 160.

That is, the reinforcing bar assembly 112 for a column of the first concrete block 110 has a length that can protrude beyond the through-hole 140 for a concrete column to the upper portion of the through-hole 140 for a concrete column.

(9) Step of Formation of Upper Concrete

After the concrete pillar forming step, as shown in FIG. 13 , the standing concrete 170 is formed on the upper part of the concrete block assembly 100A to complete the underwater concrete block structure 100B.

At this time, the upper end of the reinforcing bar assembly 112 for a column protruding to the upper portion of the through-hole 140 for a concrete column is connected to the internal reinforcing bar of the standing concrete 170 .

In the underwater concrete block structure 100B constructed as described above, the lower end of the reinforcing bar assembly 112 for the column is connected to the first concrete block 110, and the upper end of the reinforcing bar assembly 112 for the column is in the upper concrete 170. It is connected to have a very strong structure.

That is, the concrete column 160, the first concrete block 160, and the standing concrete 170 may be integrally formed by the reinforcing bar assembly 112 for the column.

Next, an underwater concrete block structure according to a second embodiment of the present invention will be described.

20 is a cross-sectional view of an underwater concrete block structure according to a second embodiment of the present invention.

This embodiment shows that the second concrete block 120 can be installed in one stage instead of being installed in multiple stages on the upper part of the first concrete block 110 .

In this example, the upper concrete was not formed.

Due to the shape of the through hole 121b of the second concrete block 120, the upper end of the concrete column 160 has a structure of the upper and lower ends, and the structure of the upper end of the upper end of the concrete column 160 is the second concrete block ( 120) is definitely prevented from escaping to the top.

Next, an underwater concrete block structure according to a third embodiment of the present invention will be described.

21 is a cross-sectional view of an underwater concrete block structure according to a third embodiment of the present invention.

In this embodiment, when the second concrete blocks 120 are respectively installed on both sides of the first concrete block 110 to form a concrete block assembly, a space for filling 180 is formed inside the concrete block assembly. .

And after the second concrete block installation step, the filling step of filling the filling material 181 such as sand, gravel or sandstone in the filling space 180 is performed.

After the filling step, the concrete column 160 is formed, and the upper concrete 170 is formed.

The above description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

100A: Concrete block aggregate
100B : Underwater Concrete Block Structure
110: first concrete block
111: first concrete block body 111a: first packing groove
112: rebar assembly for columns 112-1: preliminary rebar assembly
112-2: extension rebar assembly
113: coupling bolt
114: packing for the first watertightness
120: second concrete block
121: first concrete block body 121a: second packing groove
121b: through hole 124: second watertight packing
130: guide pole
131: guide pipe 131a: drain hole
132: upper insertion guide 132a: guide projection
133: bottom plate 133a: rebar assembly through hole
133b: bolt through hole
134: packing for third watertightness
135: drain pipe
136: nut fastener guide passage
137: Nut
138: nut fastener
140: through hole for concrete column
150: drainage device 151: drainage pump
160: concrete column 161: concrete
170: upper concrete
180: space for filling 181: filling material

Claims (10)

The first concrete block body and the reinforcing bar assembly for pillars extending vertically upward from the lower end connected to the inside of the first concrete block body and projecting to the upper part of the first concrete block body and the first concrete block body are connected to the inside of the body A plurality of coupling bolts extending in the vertical direction from the lower end, protruding to the upper portion of the first concrete block body, and disposed in a form to surround the reinforcing bar assembly for the column, and the reinforcing bar assembly for the column on the upper surface of the first concrete block body and a first concrete block manufacturing step of manufacturing a first concrete block including a first watertight packing disposed in a form to surround the plurality of coupling bolts;
A guide pole comprising a bottom plate having a reinforcing bar assembly through-hole formed in the center and having a plurality of bolt through-holes formed to surround the reinforcing bar assembly through-hole, and a guide pipe extending in an upward direction from the edge of the bottom plate guide pole preparation steps;
After the first concrete block manufacturing step and the guide pole preparation step, the reinforcing bar assembly for the pillar and the plurality of coupling bolts are respectively inserted into the reinforcing bar assembly through-hole and the plurality of bolt through-holes of the bottom plate of the guide pole. A guide pole installation step of fastening a nut to the upper end of the coupling bolt to install the guide pole on the upper portion of the first concrete block;
a first concrete block installation step of installing the first concrete block in water after the guide pole installation step;
a second concrete block manufacturing step of manufacturing a second concrete block including a second concrete block body having a through hole extending in the vertical direction;
After the second concrete block manufacturing step and the first concrete block installation step, the second concrete block is installed on top of the first concrete block so that the guide pole is inserted into the through hole of the second concrete block. An assembly is formed, but a through-hole for a concrete column whose lower end is blocked in the concrete block assembly is formed by the through-hole of the second concrete block and the first concrete block, and the first watertight packing includes the first concrete block and a second concrete block installation step positioned between the second concrete blocks to block the inflow of water from the outside into the through-hole for the concrete column;
After the second concrete block installation step, a drainage step of removing the water inside the through-hole for the concrete column;
after the draining step, a guide pawl removal step of releasing the fastening of the nut and removing the guide pawl;
After the step of removing the guide pole, the concrete pillar forming step of pouring concrete into the through-hole for the concrete pillar to form a concrete pillar in which the reinforcing bar assembly for the pillar and the poured concrete are integrated into the through-hole for the concrete pillar;
Underwater concrete block structure construction method comprising a.
The method of claim 1,
Underwater concrete block structure construction method, characterized in that the third watertight packing is provided in the form of enclosing the reinforcing bar assembly through-hole and the plurality of bolt through-holes under the bottom plate of the guide pole.
The method of claim 1 , wherein:
The guide pawl is detachably coupled to the upper end of the guide pipe and includes an upper insertion guide part tapering upward;
a nut fastener guide passage extending vertically on the inner circumferential surface of the guide pipe and positioned above the bolt through hole; Underwater concrete block structure construction method, characterized in that.
The method of claim 1,
A drain pipe extending in the vertical direction is provided inside the guide pole, and the lower end of the drain pipe communicates with the outside through a drain hole formed at the lower end of the guide pipe;
In the draining step, removing the water inside the through-hole for the concrete column using the drain pipe;
Underwater concrete block structure construction method, characterized in that.
The method of claim 1 , wherein:
The reinforcing bar assembly for the column has a length that can protrude beyond the through-hole for the concrete column to the upper portion of the through-port for the concrete column;
After the step of forming the concrete column, the step of forming the standing concrete on the upper part of the concrete block assembly, and the upper end of the reinforcing bar assembly for the column being connected to the inside of the standing concrete is added;
Underwater concrete block structure construction method, characterized in that.
The method of claim 1 , wherein:
A second watertight packing is provided on the upper surface of the second concrete block body to surround the through hole;
In the second concrete block installation step, a plurality of second concrete blocks are installed on top of the first concrete block in multiple stages, and the second watertight packing is located between the second concrete blocks installed adjacent to each other vertically to block the inflow of water from the outside to the through-hole for the concrete column;
Underwater concrete block structure construction method, characterized in that.
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