Underwater concrete block structure and method of construction thereof

Abstract

The present invention proposes a method for constructing an underwater concrete block structure through a first concrete block manufacturing step, a guide rod installation step, a first concrete block installation step, a second concrete block manufacturing step, a second concrete block installation step, a drainage step, a guide rod removal step, and a concrete column formation step, and thus, the concrete column and the first concrete block can be firmly coupled to each other through a reinforcing bar assembly for the column.

Description

TECHNICAL FIELD

[0001] The present invention relates to an underwater concrete block structure such as a harbor pier, a coastal wave absorbing seawall, or a breakwater installed in the sea or a river for various purposes, and a method of constructing the underwater concrete block structure. BACKGROUND

[0002] Generally, underwater concrete block structures such as harbor piers, coastal wave absorbing seawalls, or breakwaters are installed underwater for various purposes. The underwater structure refers to a structure installed underwater such that an upper portion thereof is located above or below the water surface.

[0003] One known construction technique for constructing an underwater structure is a large caisson method. Although the large caisson method has an advantage of being able to withstand large waves, it also has a disadvantage of requiring high transportation costs and high construction costs and having various limitations since the large caisson is a very large structure that needs to be manufactured on land, transported to an installation site, and installed in water.

[0004] In order to solve the problems of the large caisson method, a method of forming an underwater structure by stacking small concrete blocks in multiple layers according to water depth is known.

[0005] Korean Patent No. 10-1355805 (registered on January 15, 2014) entitled "Underwater Concrete Block Structure Construction Method and Underwater Concrete Block Structure" of the inventor discloses a technique in which a concrete column is formed in a waterproof membrane, and an upper concrete block and a lower concrete block are coupled together by the concrete column to form a complete structure, thus having sufficient structural stability even in waves caused by a large typhoon.

[0006] The present disclosure is proposed to further improve the prior art. SUMMARY

[0007] TECHNICAL PROBLEM

[0008] The present disclosure has been made to solve the above-mentioned problems occurring in the prior art, and is intended to propose an underwater concrete block structure in which a waterproof membrane is not used and a concrete column can be firmly coupled with a first concrete block by a columnar reinforcing member, and a construction method thereof.

[0009] TECHNICAL SOLUTION

[0010] To achieve the above object, the present disclosure provides a method of constructing an underwater concrete block structure, the method including: a first concrete block manufacturing step of manufacturing a first concrete block including a first concrete block body, a columnar reinforcement assembly vertically extending upward from a lower end portion connected to an inside of the first concrete block body and protruding upward from an upper surface of the first concrete block body, and a first watertight filler provided on the upper surface of the first concrete block body in the form of surrounding the columnar reinforcement assembly; a guide rod installation step of installing a guide rod on the first concrete block after the first concrete block manufacturing step, wherein the guide rod includes a guide tube having a vertically extending tube shape to insert the columnar reinforcement assembly along an inside of the guide tube, and an upper insertion guide portion formed at an upper end of the guide tube and having an upwardly tapered shape; a first concrete block installation step of installing the first concrete block underwater after the guide rod installation step; a second concrete block manufacturing step of manufacturing a second concrete block including a second concrete block body having a vertically extending through-hole; a second concrete block installation step of installing the second concrete block after the second concrete block manufacturing step and the first concrete block installation step such that a concrete block assembly is formed by installing the second concrete block on the first concrete block to insert the guide rod into the through-hole of the second concrete block, wherein a concrete column through-hole having a closed lower end is formed in the concrete block assembly by the through-hole of the second concrete block and the first concrete block, and the first watertight filler is positioned between the first concrete block and the second concrete block to prevent water from being introduced from the outside into the concrete column through-hole; a drainage step of removing water accommodated inside the concrete column through-hole after the second concrete block installation step; a guide rod removal step of removing the guide rod after the drainage step; and a concrete column formation step of forming a concrete column by pouring concrete into the concrete column through-hole after the guide rod removal step, wherein the concrete column includes the columnar reinforcement assembly and the poured concrete integrated with each other, and is coupled to the first concrete block body through the columnar reinforcement assembly.

[0011] In the above, the columnar reinforcement assembly can have a length passing through the concrete column through-hole and protruding from a top of the concrete column through-hole, and can include a cap concrete formation step of forming a cap concrete on the concrete block assembly after the concrete column formation step such that the upper end of the columnar reinforcement assembly is connected to an inside of the cap concrete.

[0012] In the above, the block-side coupler can be provided in the first concrete block body in the form of surrounding the columnar rebar assembly, the guide rod can include a pipe-side coupler detachably coupled to the block-side coupler at a lower end portion of the guide pipe, and a third water-tight packing provided on the lower end portion of the guide pipe to prevent water from being introduced from the outside into the inside of the guide pipe by being in close contact with the first concrete block when the pipe-side coupler of the guide rod is coupled to the block-side coupler, and in the guide rod installation step, the pipe-side coupler of the guide rod can be detachably coupled to the block-side coupler of the first concrete block.

[0013] In the above, the drain pipe can vertically extend inside the guide rod, a lower end of the drain pipe being communicated with the outside through a drain hole formed in the lower end portion of the guide pipe, in the draining step, water contained inside the concrete column through-hole can be removed using the drain pipe, and the guide rod removal step can be performed after the draining step.

[0014] In the above, the second water-tight packing can be provided on the upper surface of the second concrete block body in the form of surrounding the through-hole; and in the second concrete block installation step, a plurality of second concrete blocks can be installed on the first concrete block in multiple layers, and the second water-tight packing can be located between the second concrete blocks installed vertically adjacent to each other, so that water is prevented from being introduced from the outside into the concrete column through-hole.

[0015] In another aspect of the present disclosure, an underwater concrete block structure includes a concrete block assembly including a first concrete block having a first concrete block body, a columnar rebar assembly vertically upwardly extending from a lower end portion connected with an inside of the first concrete block body and protruding upwardly from an upper surface of the first concrete block body, and a block-side coupler provided in the first concrete block body in the form of surrounding the columnar rebar assembly, a second concrete block having a second concrete block body with a vertically extending through-hole and installed on the first concrete block so that the columnar rebar assembly of the first concrete block is inserted into the through-hole of the second concrete block, and a first water-tight packing located between the first concrete block and the second concrete block and preventing water from being introduced from the outside into a concrete column through-hole formed by the through-hole of the second concrete block and the first concrete block, and a concrete column formed so that concrete poured into the concrete column through-hole is integrated with the columnar rebar assembly and coupled to the first concrete block body through the columnar rebar assembly.

[0016] In the above, the columnar reinforcement assembly can have a length passing through the concrete column through-hole and protruding from the top of the concrete column through-hole, a cap concrete can be formed on the concrete block assembly, and an upper end of the columnar reinforcement assembly can be connected to the inside of the cap concrete.

[0017] In the above, the concrete block assembly can include a plurality of second concrete blocks installed in multiple layers on the first concrete block, and a second water-tight filler located between the second concrete blocks installed vertically adjacent to each other, such that water is prevented from being introduced from the outside into the concrete column through-hole.

[0018] Advantageous Effects

[0019] As described above, the present disclosure does not require a waterproofing membrane, the concrete column can be formed in the same manner as a terrestrial environment, and the concrete column and the first concrete block can be more firmly coupled by the columnar reinforcement assembly. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figures 1 to 9 FIG. 1 is a perspective view of a concrete block structure according to a first embodiment of the present disclosure,

[0021] Figure 10 FIG. 2 is a perspective view of a first concrete block in FIG. 1, Figure 1

[0022] Figure 11 FIG. 4 is a sectional view of a guide rod in FIG. 1, Figure 3

[0023] Figure 12 FIG. 6 is a sectional view taken along line A-A of FIG. 1, Figure 11

[0024] Figure 13 FIG. 8 is a perspective view of a second concrete block in FIG. 1, Figure 5

[0025] Figure 14 FIG. 10 is a sectional view of a concrete block assembly in which a plurality of concrete blocks are continuously horizontally disposed, Figure 5

[0026] Figure 15 FIG. 12 is a sectional view of an underwater concrete block structure according to a second embodiment of the present disclosure,

[0027] Figure 16 FIG. 14 is a sectional view of an underwater concrete block structure according to a third embodiment of the present disclosure,

[0028] Figure 17 FIG. 16 is a sectional view of an underwater concrete block structure according to a fourth embodiment of the present disclosure,

[0029] ​​​​​Figure 18 is a perspective view of a second concrete block of Figure 17 ,

[0030] Figure 19 is a sectional view of Figure 18 . DETAILED DESCRIPTION

[0031] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present disclosure belongs can easily embody the present disclosure. However, the present disclosure can be embodied in various different forms and is not limited to the embodiments described herein. Also, in the drawings, parts irrelevant to the description of the present disclosure are omitted for the sake of clear description of the present disclosure, and like parts are designated like reference numerals throughout the specification.

[0032] Throughout the specification, when a part "comprises" a certain component, it means that other components can also be included without being excluded, unless explicitly stated to the contrary.

[0033] First, a method of constructing an underwater concrete block structure according to a first embodiment of the present disclosure will be described.

[0034] Figures 1 to 9 is a view sequentially illustrating a method of constructing an underwater concrete block structure according to the first embodiment of the present disclosure, Figure 10 is a perspective view of a first concrete block of Figure 1 , Figure 11 is a sectional view of a guide rod of Figure 3 , Figure 12 is a sectional view taken along the A-A line of Figure 11 , Figure 13 is a perspective view of a second concrete block of Figure 5 , Figure 14 is a sectional view of a concrete block assembly in which a plurality of Figure 5 are continuously horizontally disposed.

[0035] (1) First Concrete Block Manufacturing Step

[0036] In this embodiment, the first concrete block manufacturing step is performed in the order of Figure 1 and Figure 2 .

[0037] First, as illustrated in Figure 1 and Figure 10 , a first concrete block 110 is first manufactured.

[0038] The first concrete block 110 includes a first concrete block body 111 having a cuboid shape, as illustrated in Figure 10 .

[0039] The first concrete block body 111 is provided with an initial steel bar assembly 112-1, a block side coupler 113, and a first watertight filler 114.

[0040] In this embodiment, two initial steel bar assemblies 112-1 are provided, and the block side coupler 113 and the first watertight filler 114 are provided for each of the initial steel bar assemblies 113-1.

[0041] Each of the initial steel bar assemblies 112-1 has a lower end portion connected to the inside of the first concrete block body 111 (specifically, the inside reinforcing rib of the first concrete block body 111), and the initial steel bar assembly 112-1 extends vertically upward from the lower end portion to protrude upward from the upper surface of the first concrete block body 111.

[0042] As Figure 2 illustrated in FIG. 1, the extension steel bar assembly 112-2 is connected to the initial steel bar assembly 112-1, and thus the initial steel bar assembly 112-1 and the extension steel bar assembly 112-2 collectively configure a columnar steel bar assembly 112.

[0043] The block side coupler 113 is provided in the form of a tube surrounding the initial steel bar assembly 112-1.

[0044] In this embodiment, the block side coupler 113 has the form of a tube, and the initial steel bar assembly 112-1 is disposed in the block side coupler 113, and an external thread 113a is formed on the outer peripheral surface of the block side coupler 113.

[0045] A first filler groove 111a is formed on the upper surface of the first concrete block body 111, and the first watertight filler 114 is provided in the first filler groove 111a.

[0046] The first filler groove 111a and the first watertight filler 114 are formed in the form of a ring surrounding the initial steel bar assembly 112-1.

[0047] After the first concrete block 110 as Figure 1 illustrated in FIG. 1 is manufactured, the extension steel bar assembly 112-2 is connected to the initial steel bar assembly 112-1 as Figure 2 illustrated in FIG. 2, and the manufacturing of the first concrete block 110 is completed.

[0048] Thus, the first concrete block 110 includes the first concrete block body 111, the columnar steel bar assembly 112, the block side coupler 113, and the first watertight filler 114.

[0049] (2) Guide rod mounting step

[0050] After the first concrete block manufacturing step, as Figure 3 The guide rod 130 is detachably coupled to the block-side coupler 113 of the first concrete block 110, as illustrated in FIGS. 1 and 2.

[0051] As illustrated in FIGS. 1 and 2, the guide rod 130 includes a guide tube 131, an upper insertion guide portion 132, a tube-side coupler 133, a third water-tight packing 134, and a drain pipe 135. Figure 11 Figure 12 The guide rod 130 includes a guide tube 131, an upper insertion guide portion 132, a tube-side coupler 133, a third water-tight packing 134, and a drain pipe 135.

[0052] The guide tube 131 having a tube shape extending in the vertical direction has a hollow portion extending in the vertical direction formed along the inside thereof, and the guide tube 131 is open in the upper and lower portions thereof.

[0053] Accordingly, the columnar reinforcement assembly 112 can be inserted along the inside of the guide tube 131.

[0054] The guide tube 131 has a drain hole 131a formed at the lower end portion thereof.

[0055] The upper insertion guide portion 132 is formed at the upper end of the guide tube 131, and has a shape tapered upward.

[0056] The upper insertion guide portion 132 is intended to become a guide for installing the second concrete block 120 which will be described later.

[0057] The tube-side coupler 133 is provided on the inner peripheral surface of the lower end portion of the guide tube 131, and is detachably coupled to the block-side coupler 113 of the first concrete block 110.

[0058] To this end, an internal thread 133a is formed in the tube-side coupler 133 so as to be screwed to the external thread 113a of the block-side coupler 113.

[0059] In this embodiment, although the tube-side coupler 133 and the block-side coupler 113 are exemplified as being coupled by threads so as to be detachably coupled, the detachable coupling structure can be applied in various ways.

[0060] The third water-tight packing 134 is provided on the lower end portion of the guide tube 131, and prevents water from being introduced from the outside into the guide tube 131 when the guide rod 130 is coupled to the block-side coupler 113, that is, when the tube-side coupler 133 is screwed to the block-side coupler 113.

[0061] The third water-tight packing 134 is in close contact with the first concrete block 110 when the tube-side coupler 133 of the guide rod 130 is screwed to the block-side coupler 113, and thus it is possible to prevent water from being introduced into the guide tube 131. ​

[0062] The drain pipe 135 is a vertically extending pipe inside the guide rod 130, and the lower end of the drain pipe 135 communicates with the outside through a drain hole 131a formed in the lower end portion of the guide pipe 131, and the upper end of the drain pipe 135 extends to the upper end portion of the guide rod 130.

[0063] 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.

[0064] like Figure 3 As illustrated, the first concrete block 110 can be installed underwater after the guide rod 130 is connected to the block-side connector 113 on land.

[0065] In some cases, the guide rod 130 may be installed only on top of the first concrete block 110, and in such cases, the guide rod installation step may be performed after the first concrete block installation step.

[0066] (3) Installation steps of the first concrete block

[0067] In such Figure 3 As shown in the diagram, after the guide rod 130 is installed on the first concrete block 110, as... Figure 4 The diagram shows the first concrete block 110 being installed underwater.

[0068] like Figure 4 As shown in the figure, the third watertight filler 134 is in close contact with the first concrete block 110 and prevents water from being introduced into the guide rod 130.

[0069] In addition, the upper end of the guide rod 130 protrudes from the water surface.

[0070] Therefore, in this embodiment, the columnar steel reinforcement assembly 112 does not come into contact with seawater via the guide rod 130. Thus, the columnar steel reinforcement assembly 112 is not at risk of corrosion due to contact with seawater.

[0071] (4) Second concrete block manufacturing steps

[0072] Manufacture the second concrete block 120.

[0073] like Figure 13 As illustrated, the second concrete block 120 includes a second concrete block body 121, which has a cuboid shape and two vertically extending through holes 121b.

[0074] The diameter of the through hole 121b is larger than the diameter of the guide tube 131.

[0075] A second watertight filler 124 is provided in each of the through holes 121b of the second concrete block body 121.

[0076] A second filler groove 121a is formed on the upper surface of the second concrete block body 121, and the second watertight filler 124 is provided in each of the second filler grooves 121a.

[0077] The second filler groove 121a and the second watertight filler 124 are formed in the form of a ring surrounding the through hole 121b.

[0078] (5) Second concrete block installation step

[0079] After the second concrete block manufacturing step and the first concrete block installation step, as illustrated in Figure 5 , the second concrete block 120 is installed on the top of the first concrete block 110, and thus a concrete block assembly 100A is formed.

[0080] As illustrated in Figure 4 , the second concrete block 120 is installed such that the columnar reinforcement assembly 112 of the first concrete block 110 installed underwater is inserted into the through hole 121b of the second concrete block 120.

[0081] More specifically, the second concrete block 120 is lowered from the upper side to the lower side such that the guide rod 130 installed in the first concrete block 110 is inserted into the through hole 121b of the second concrete block 120.

[0082] In this case, the upper portion of the guide rod 130, the guide portion 132, is easily inserted into the through hole 121b of the second concrete block 120 and guides the seating position of the second concrete block 120.

[0083] This process is described in more detail in Korean Patent No. 10-2022339 “수중 콘크리트 블록 구조물 시공방법 (Method for constructing a concrete block structure underwater)” (registered on September 10, 2019), incorporated into the present specification.

[0084] As illustrated in Figure 5 , a plurality of second concrete blocks 120 are installed in multiple layers on the top of the first concrete block 110, or in another embodiment (refer to Figure 15 ), the second concrete block 120 can be installed in a single layer on the top of the first concrete block 110.

[0085] Therefore, in the concrete block assembly 100A formed by installing the second concrete block 120, a concrete column through hole 140 having a closed lower end portion is formed.

[0086] The concrete column through-hole 140 is formed by the through-hole 121b of the second concrete block 120 and the first concrete block 110.

[0087] In the concrete block assembly 100A, the first water-tight filler 114 is positioned between the first concrete block body 111 and the second concrete block body 121, and prevents water from being introduced from the outside into the concrete column through-hole 140.

[0088] In the concrete block assembly 100A, the second water-tight filler 124 is positioned between the vertically disposed second concrete block bodies 121, and prevents water from being introduced from the outside into the concrete column through-hole 140.

[0089] That is, in the concrete block assembly 100A, although water exists in the concrete column through-hole 140, there is no water inside the guide rod 130, and water exists only in the outer space of the guide rod 130. Further, due to the first water-tight filler 114 and the second water-tight filler 124, external water cannot be introduced into the concrete column through-hole 140.

[0090] As illustrated in FIG. 1A, in the concrete block assembly 100A, the plurality of first concrete blocks 110 are continuously horizontally disposed, and the plurality of second concrete blocks 120 are continuously horizontally disposed. Figure 14

[0091] (6) Water draining step

[0092] After the second concrete block installation step, as illustrated in FIG. 1A, a water draining step is performed to remove water inside the concrete column through-hole 140. Figure 6

[0093] To this end, a water draining device 150 including a water draining pump 151 is connected to the upper end of the water draining pipe 135, and due to the operation of the water draining pump 151, water contained inside the concrete column through-hole 140 is drained to the outside through the water draining pipe 135 and the water draining device 150.

[0094] At the same time, due to the first water-tight filler 114 and the second water-tight filler 124, water cannot flow into the concrete column through-hole 140 from the outside, and thus, due to this step, the concrete column through-hole 140 becomes dry.

[0095] In this embodiment, inside the concrete column through-hole 140, only water in the outer space of the guide rod 130 is drained, and thus, the water draining time is greatly reduced.

[0096] ​​According to an embodiment, there can be a case in which the guide rod 130 is not used. In this case, there is inconvenience in inserting the drain hose up to the lower portion of the concrete column through-hole 140, and furthermore, since the inside of the concrete column through-hole 140 is filled with water, it takes a considerable amount of time to drain the water.

[0097] (7) Guide rod removal step

[0098] After the drain step, as illustrated in FIG. 7, Figure 7 the guide rod removal step is performed to remove the guide rod 130.

[0099] The guide rod 130 is rotated such that the threaded coupling of the pipe-side coupler 133 to the block-side coupler 113 is released, and the guide rod 130 is moved upward to be removed.

[0100] (8) Concrete column formation step

[0101] After the guide rod removal step, as illustrated in FIG. 8, Figure 8 the concrete 161 is poured into the concrete column through-hole 140, and the concrete column 160 is formed such that the columnar reinforcement assembly 112 and the poured concrete 161 are integrated with each other in the concrete column through-hole 140.

[0102] In this case, there is no water in the concrete column through-hole 140, and there is no risk of the poured concrete leaking to the outside due to the first water-tight filler 114 and the second water-tight filler 124, and thus a separate waterproofing film is not required.

[0103] That is, the pouring of the concrete 161 can be performed in the same environment as on land.

[0104] Meanwhile, the upper end portion of the columnar reinforcement assembly 112 is not formed into the concrete column 160, and protrudes from the top of the concrete column 160.

[0105] That is, the columnar reinforcement assembly 112 of the first concrete block 110 has a length that passes through the concrete column through-hole 140 and protrudes from the top of the concrete column through-hole 140.

[0106] (9) Cap concrete formation step

[0107] After the concrete column formation step, as illustrated in FIG. 9, Figure 9 the cap concrete 170 is formed on the top of the concrete block assembly 100A, and thus the underwater concrete block structure 100B is completed.

[0108] In this case, the upper end portion of the columnar reinforcement assembly 112 that protrudes upward from the upper surface of the concrete column through-hole 140 is connected to the internal reinforcement rib of the cap concrete 170.

[0109] In the underwater concrete block structure 100B manufactured as described above, the lower end portion of the columnar reinforcement assembly 112 is connected to the first concrete block 110, and the upper end portion of the columnar reinforcement assembly 112 is connected to the cap concrete 170, so that the underwater concrete block structure 100B has a very strong structure.

[0110] That is, the concrete column 160, the first concrete block 110, and the cap concrete 170 can be integrally formed by the columnar reinforcement assembly 112.

[0111] Next, the underwater concrete block structure according to the second embodiment of the present disclosure will be described.

[0112] Figure 15 is a cross-sectional view of the underwater concrete block structure according to the second embodiment of the present disclosure.

[0113] This embodiment shows that the second concrete block 120 can be installed on the first concrete block 110 in a single layer, instead of being installed in multiple layers.

[0114] In this embodiment, the cap concrete is not formed.

[0115] Due to the shape of the through-hole 121b of the second concrete block 120, the upper end portion of the concrete column 160 has a form in which the top is wide and the bottom is narrow, and the upper end portion of the concrete column 160 certainly prevents the second concrete block 120 from escaping upward.

[0116] Next, the underwater concrete block structure according to the third embodiment of the present disclosure will be described.

[0117] Figure 16 is a cross-sectional view of the underwater concrete block structure according to the third embodiment of the present disclosure.

[0118] In this embodiment, when the second concrete block 120 is installed on both sides of the first concrete block 110 to form a concrete block assembly, a space 180 for filling is formed inside the concrete block assembly.

[0119] After the second concrete block installation step, a filling step is performed to fill a filling material 181 (sand, gravel, or riprap, etc.) in the space 180 for filling.

[0120] After the filling step, the concrete column 160 is formed and the cap concrete 170 is formed.

[0121] Next, the underwater concrete block structure according to the fourth embodiment of the present disclosure will be described.

[0122] Figure 17is a sectional view of the underwater concrete block structure according to the fourth embodiment of the present disclosure, Figure 18 is Figure 17 a perspective view of the second concrete block in Figure 19 is Figure 18 a sectional view of the same.

[0123] As illustrated in Figure 18 and Figure 19 , the second concrete block body of the second concrete block 120 according to this embodiment includes an upper concrete slab 125, a lower concrete slab 126, and a vertical connection pipe 127.

[0124] The upper concrete slab 125 and the lower concrete slab 126 are spaced apart from each other in a vertical direction, so that seawater can flow therebetween.

[0125] A second watertight filler 124 is provided on the upper concrete slab 125.

[0126] The upper and lower portions of the vertical connection pipe 127 are connected to the upper and lower concrete slabs 125 and 126, respectively, so that the middle portion of the vertical connection pipe is exposed to the outside between the upper and lower concrete slabs 125 and 126.

[0127] In addition, the vertical connection pipe 127 is a hollow pipe having a through-hole 127a therein.

[0128] The underwater concrete block structure 100B as shown in Figure 17 is formed by using the second concrete block 12.

[0129] In Figure 17 , the concrete column 160 is vertically continuously formed along the vertical through-hole 127a of the vertical connection pipe 127.

[0130] In such an underwater concrete block structure 100B of the present embodiment, an environment in which seawater can freely flow in the underwater concrete block structure is provided.

[0131] That is, seawater can freely flow around the vertical connection pipe 127, and the concrete column 160 is integrally formed through the vertical connection pipe 127, so that the underwater concrete block structure 100B has a very tightly coupled structure.

[0132] The above description of the present disclosure is for illustrative purposes only, and those skilled in the art will understand that various modifications can be made without departing from the scope and spirit of the present disclosure. Therefore, it should be understood that the above-described embodiments are illustrative in all aspects and are not restrictive. For example, each component described as a single type can be implemented in a distributed manner, and similarly, a component described as distributed can also be implemented in a combined form.

[0133] The scope of the present disclosure is indicated by the claims to be described later rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as included in the scope of the present disclosure.

[0134] Industrial applicability

[0135] The present invention can be used to construct an underwater concrete block structure installed in the sea or a river for various purposes such as a harbor pier, a coastal wave absorbing revetment, or a breakwater, etc.

Claims

1. A method of constructing a concrete block structure underwater, the method comprising: a first concrete block manufacturing step of manufacturing a first concrete block including a first concrete block body, a columnar reinforcing bar assembly extending vertically upward from a lower end portion of the columnar reinforcing bar assembly connected to an inside of the first concrete block body and protruding upward from an upper surface of the first concrete block body, and a first watertight filler provided in a form of surrounding the columnar reinforcing bar assembly on the upper surface of the first concrete block body; a guide rod installation step of installing a guide rod on the first concrete block after the first concrete block manufacturing step, wherein the guide rod includes a guide pipe having a vertically extending pipe shape to insert the columnar reinforcing bar assembly along an inside of the guide pipe and an upper insertion guide portion formed at an upper end of the guide pipe and having an upwardly tapered shape; a first concrete block installation step of installing the first concrete block underwater after the guide rod installation step; a second concrete block manufacturing step of manufacturing a second concrete block including a second concrete block body having a vertically extending through-hole; a second concrete block installation step of installing the second concrete block after the second concrete block manufacturing step and the first concrete block installation step such that a concrete block assembly is formed by installing the second concrete block on the first concrete block to insert the guide rod into the through-hole of the second concrete block, wherein a concrete column through-hole having a closed lower end is formed in the concrete block assembly by the through-hole of the second concrete block and the first concrete block, and the first watertight filler is located between the first concrete block and the second concrete block to prevent water from being introduced from the outside into the concrete column through-hole; a water discharge step of removing water contained inside the concrete column through-hole after the second concrete block installation step; a guide rod removal step of removing the guide rod after the water discharge step; and a concrete column formation step of forming a concrete column by pouring concrete into the concrete column through-hole after the guide rod removal step, wherein the concrete column includes the columnar reinforcing bar assembly and the poured concrete integrated with each other and coupled to the first concrete block body through the columnar reinforcing bar assembly.

2. The method of claim 1, wherein, the columnar reinforcing bar assembly has a length passing through the concrete column through-hole and protruding from a top of the concrete column through-hole, and the method includes a cap concrete formation step of forming a cap concrete on the concrete block assembly such that an upper end of the columnar reinforcing bar assembly is connected to an inside of the cap concrete after the concrete column formation step.

3. The method of claim 1, wherein, a block side coupler in a form of surrounding the columnar reinforcing bar assembly is provided in the first concrete block body, The guide rod includes a pipe side coupler at a lower end portion of the guide pipe to be detachably coupled to the block side coupler, and a third water-tight packing provided on the lower end portion of the guide pipe to prevent water from being introduced from the outside into the inside of the guide pipe by being in close contact with the first concrete block when the pipe side coupler of the guide rod is coupled to the block side coupler, and In the guide rod installation step, the pipe side coupler of the guide rod is detachably coupled to the block side coupler of the first concrete block.

4. The method of claim 3, wherein, A drain pipe vertically extends inside the guide rod, a lower end of the drain pipe is communicated with the outside through a drain hole formed in a lower end portion of the guide pipe, In the water draining step, water contained inside the concrete column through-hole is removed using the drain pipe, and The guide rod removal step is performed after the water draining step.

5. The method of claim 1, wherein, A second water-tight packing is provided on an upper surface of the second concrete block body in the form of surrounding the through-hole; and In the second concrete block installation step, a plurality of the second concrete blocks are installed on the first concrete block in multiple layers, and the second water-tight packing is located between the second concrete blocks installed vertically adjacent to each other, so that water is prevented from being introduced from the outside into the concrete column through-hole.

6. An underwater concrete block structure, comprising: a concrete block assembly including a first concrete block, a second concrete block, a concrete column through-hole, and a first water-tight packing, the first concrete block having a first concrete block body, a columnar reinforcing bar assembly extending vertically upward from a lower end portion of the columnar reinforcing bar assembly connected with an inside of the first concrete block body and protruding upward from an upper surface of the first concrete block body, and a block side coupler provided in the first concrete block body in the form of surrounding the columnar reinforcing bar assembly, the second concrete block having a second concrete block body with a vertically extending through-hole and installed on the first concrete block so that the columnar reinforcing bar assembly of the first concrete block is inserted into the through-hole of the second concrete block, the concrete column through-hole having a closed lower end and formed by the through-hole of the second concrete block and the first concrete block, and the first water-tight packing located between the first concrete block and the second concrete block and preventing water from being introduced from the outside into the concrete column through-hole; and a concrete column formed so that concrete poured into the concrete column through-hole is integrated with the columnar reinforcing bar assembly and coupled to the first concrete block body through the columnar reinforcing bar assembly.

7. The underwater concrete block structure of claim 6, wherein, The columnar reinforcing bar assembly has a length passing through the concrete column through-hole and protruding from a top of the concrete column through-hole, a cap concrete is formed on the concrete block assembly, and an upper end of the columnar reinforcing bar assembly is connected to an inside of the cap concrete.

8. The underwater concrete block structure of claim 6, wherein, The concrete block assembly includes a plurality of second concrete blocks installed in multiple layers on the first concrete block, and a second water-tight filler located between the second concrete blocks installed vertically adjacent to each other, such that water is prevented from being introduced from the outside into the concrete column through-hole.

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