Concrete block structure and construction method therefor

Abstract

The present invention relates to a novel type of construction method and a novel concrete block structure constructed thereby, the method being capable of remarkably enhancing the stability of a concrete block structure by forming drilled ground portions below through-hole portions for concrete columns of the concrete block and integrally forming, by using reinforcing bar assemblies for columns, precast concrete piles and cast-in-place concrete columns along the through-hole portions for concrete columns and the drilled ground portions so as to form composite concrete columns.

Description

Concrete block structure and its construction method

[0001] The present invention relates to a concrete block structure installed on land, sea, or riverbanks for various purposes, such as berthing facilities for ports, breakwater structures installed on coasts, breakwaters, and fixed wind turbine foundations, and a method for constructing the same.

[0002] Underwater structures are installed underwater for various purposes, such as berthing facilities for ports, wave-dissipating structures installed on coastlines, and breakwaters. In the above and below, the term "underwater structure" refers to a structure installed with its lower portion submerged underwater, and the upper portion of the underwater structure may protrude above the water surface or be located below the water surface.

[0003] A widely known construction technique for underwater structures is the large caisson method. While the large caisson method has the advantage of being able to withstand large waves, it entails significant transportation and construction costs, as well as various constraints, because very large caissons must be fabricated on land, transported to the installation site, and then installed underwater.

[0004] To solve the problems of such large caisson construction methods, a method of forming underwater structures by stacking small concrete blocks in multiple layers according to water depth is known.

[0005] The inventor proposed Korean Patent Registration No. 10-1355805, "Method for constructing an underwater concrete block structure and an underwater concrete block structure" (registered Jan. 15, 2014), thereby presenting a technology that enables an underwater concrete block structure to have sufficient structural stability even against waves caused by large typhoons, etc., by ensuring that the upper concrete block and the lower concrete block have structural integrity through concrete columns.

[0006] Meanwhile, the stability of underwater structures, such as large caisson construction methods, is generally determined by the weight of the underwater structure and friction (i.e., the contact area of ​​the underwater structure with the ground and the coefficient of friction between the underwater structure and the foundation ground).

[0007] This determination method is based on the premise that the underwater structure is simply loaded onto the foundation ground.

[0008] Therefore, even in the case where an underwater structure is integrated with multiple concrete blocks, the stability of the underwater structure is determined solely by the weight and frictional force of the underwater structure.

[0009] Due to these issues, there is a problem in that the underwater structure must still be constructed to the same size as a large caisson, even though it is a structure integrated with multiple concrete blocks.

[0010]

[0011] Meanwhile, the inventor has proposed Korean registered patent No. 10-2022341, "Method for constructing an underwater concrete block structure" (registered September 10, 2019), and the above prior art relates to a technique of forming a ground drilling section at the bottom of an up-and-down penetration hole of a concrete block and forming a cast-in-place concrete column along the up-and-down penetration hole of the concrete block and the ground drilling section.

[0012] In the above-mentioned conventional technology, to form a cast-in-place concrete column, a waterproofing membrane must be inserted down to the bottom of the ground bore (i.e., submerged in water), and concrete must be poured inside the waterproofing membrane.

[0013] However, if the waterproof membrane is submerged while its interior is empty, there is a problem in that the membrane is easily damaged as it contracts due to external water pressure and comes into contact with the internal reinforcing steel.

[0014] Furthermore, in order to sink a waterproof membrane underwater while it is hollow, a downward force greater than the buoyancy acting on it must be applied; however, it is not easy to apply such a downward force.

[0015] To solve this problem, if an attempt is made to sink the waterproofing membrane underwater with a certain amount of concrete filled inside, the membrane expands due to the internal concrete, making it difficult to insert into ground protection pipes or ground boreholes.

[0016] In addition, when the waterproofing membrane is filled with concrete and the membrane is sunk through a ground protection pipe, the ground protection pipe must be removed; however, as the outer surface of the ground protection pipe adheres to the underwater ground while its inner surface adheres to the waterproofing membrane, removing the ground protection pipe becomes difficult.

[0017] The present invention has been devised to solve the problems of the conventional technology described above, and proposes a new type of construction method and a new concrete block structure based thereon that can significantly enhance the stability of a concrete block structure by forming a ground drilling section at the bottom of a through-hole for a concrete column in a concrete block, and forming a composite concrete column in which a precast concrete pile and a cast-in-place concrete column are integrally formed along the through-hole for the concrete column and the ground drilling section via a column reinforcement assembly.

[0018] In addition, since the present invention inserts a composite column structure in which a precast concrete pile and a waterproof membrane are integrated into a ground bore, problems such as damage to the waterproof membrane or difficulty in underwater insertion due to buoyancy can be solved all at once.

[0019] One concept of the present invention for solving the above problem comprises, in a method for constructing a concrete block structure, a concrete block manufacturing step of manufacturing a concrete block having an upward and downward through-hole extending in the upward and downward direction; a concrete block installation step of installing the concrete block manufactured in the concrete block manufacturing step on the upper part of the ground so that the upward and downward through-hole of the concrete block forms a through-hole for a concrete column, wherein the lower end is blocked by the ground and the upper end is open; and a ground drilling section formation step, after the concrete block installation step, of drilling the ground located below the through-hole for the concrete column to form a ground drilling section which is a space continuous with the through-hole for the concrete column. A composite column forming step, wherein, after the above ground drilling step, a composite column forming member is inserted into the concrete column through-hole and the ground drilling section, the composite column forming member comprising a precast concrete pile extending in the vertical direction, a column reinforcing bar assembly extending vertically upward from a lower portion connected to the interior of the precast concrete pile and protruding to the upper portion of the precast concrete pile, and a waterproof membrane in the form of a tube with both the upper and lower ends open, the lower portion connected to the upper portion of the precast concrete pile, and the column reinforcing bar assembly extending in the vertical direction along the interior thereof; and, after the above composite column forming step, a cast-in-place concrete column is formed by pouring concrete into the interior of the waterproof membrane, wherein the composite column forming member is transformed into a composite concrete column in which the precast concrete pile and the cast-in-place concrete column are integrally formed through the column reinforcing bar assembly along the concrete column through-hole and the ground drilling section.The invention includes, wherein the ground on which the concrete block is installed is an underwater ground, and the composite column forming body includes a waterproof membrane protective tube temporarily placed on the upper part of the precast concrete pile and extending vertically along the interior of the waterproof membrane protective tube along the column reinforcing bar assembly and the waterproof membrane, a watertight packing provided at the upper part of the precast concrete pile to ensure the lower end of the waterproof membrane protective tube is in close contact, and a temporary fixing part for the waterproof membrane protective tube that temporarily fixes the upper end of the waterproof membrane protective tube to the upper part of the column reinforcing bar assembly, and is characterized by removing the temporary fixing part for the waterproof membrane protective tube and the waterproof membrane protective tube during the composite concrete column forming step.

[0020] In the above, a filler injection passage is formed inside the precast concrete pile to connect the side of the precast concrete pile and the upper part of the precast concrete pile, and the composite column forming body further includes a filler injection pipe that extends vertically upward while its lower end is connected to the filler injection passage of the precast concrete pile, and after the composite concrete column forming step, it is preferable to further include an adhesive filler injection step of injecting an adhesive filler into the ground bore where the precast concrete pile is located through the filler injection pipe and the filler injection passage.

[0021] In the above, the step of forming the ground borehole involves inserting a ground protection tube extending in the vertical direction into the ground through the through-hole for the concrete column while borehole the ground located below the through-hole for the concrete column, wherein the inserted ground protection tube is positioned across the through-hole for the concrete column and the ground borehole, and the ground borehole is formed inside the inserted ground protection tube, and it is preferable to remove the ground protection tube after the step of inserting the composite column forming body.

[0022] In the above, during the concrete block installation step, a plurality of concrete blocks are installed on the upper part of the ground to form a concrete block assembly in which the plurality of concrete blocks are continuously arranged in the horizontal and vertical directions, and a through hole for the concrete column may be formed in which the vertical penetration hole of the plurality of concrete blocks continuously arranged in the vertical direction is continuous in the vertical direction, with the lower end blocked by the ground and the upper end open.

[0023] In the above, the ground on which the concrete block is installed is an underwater ground, and the underwater ground includes a foundation ground artificially created for an underwater concrete block structure, and a foundation ground creation step for creating the foundation ground is included prior to the concrete block installation step, and the foundation ground may be any one of a foundation rubble ground, a replacement rubble ground, a deep mixing treatment ground, a soft ground improvement treatment ground, or a combination thereof.

[0024] In the above, the concrete block may include a concrete top plate, a concrete bottom plate provided spaced downward from the concrete top plate, and a vertical tube for connection in the form of a hollow tube, wherein the upper end is inserted and connected to the concrete top plate and the lower end is inserted and connected to the concrete bottom plate, the upper and lower middle part is exposed to the outside between the concrete top plate and the concrete bottom plate, and the upper and lower through hole is formed in the upper and lower direction.

[0025]

[0026] Another concept of the present invention for solving the above problem is a method for constructing a concrete block structure, comprising: a concrete block manufacturing step of manufacturing a concrete block having an upward and downward penetrating hole extending in the upward and downward direction; a concrete block installation step of installing the concrete block manufactured in the concrete block manufacturing step on the upper part of the ground so that the upward and downward penetrating hole of the concrete block forms a penetrating hole for a concrete column, wherein the lower end is blocked by the ground and the upper end is open; and a ground drilling section formation step, after the concrete block installation step, of drilling the ground located below the penetrating hole for the concrete column to form a ground drilling section which is a space continuous with the penetrating hole for the concrete column. A composite column forming step, wherein, after the above ground drilling step, a composite column forming member is inserted into the concrete column through-hole and the ground drilling section, the composite column forming member comprising a precast concrete pile extending in the vertical direction, a column reinforcing bar assembly extending vertically upward from a lower portion connected to the interior of the precast concrete pile and protruding to the upper portion of the precast concrete pile, and a waterproof membrane in the form of a tube with both the upper and lower ends open, the lower portion connected to the upper portion of the precast concrete pile, and the column reinforcing bar assembly extending in the vertical direction along the interior thereof; a composite concrete column forming step, wherein, after the above composite column forming member insertion step, concrete is poured into the interior of the waterproof membrane to form a cast-in-place concrete column, and the composite column forming member is transformed into a composite concrete column in which the precast concrete pile and the cast-in-place concrete column are integrally formed through the column reinforcing bar assembly along the concrete column through-hole and the ground drilling section; and a top concrete forming step, wherein, after the above composite concrete column forming step, top concrete is formed on the upper portion of the concrete block.The method includes, wherein the ground on which the concrete block is installed is a soft seabed ground formed on top of the seabed bedrock, and in the ground drilling section formation step, the soft seabed ground and the seabed bedrock are drilled to form the ground drilling section in the soft seabed ground and the seabed bedrock, and the vertical length of the precast concrete pile is shorter than the vertical length of the ground drilling section, and the cast-in-place concrete column is divided into a concrete column section for a penetration hole located in the vertical penetration hole of the concrete block and a concrete column section for a soft ground located in the soft seabed ground, and the concrete column section for a soft ground is formed to support the bottom of the concrete block while having a diameter larger than the diameter of the concrete column section for a penetration hole.

[0027]

[0028] Another concept of the present invention for solving the above problem is a method for constructing a concrete block structure, comprising: a concrete block manufacturing step of manufacturing a concrete block having an upward and downward penetrating hole extending in the upward and downward direction; a concrete block installation step of installing the concrete block manufactured in the concrete block manufacturing step on the upper part of the ground so that the upward and downward penetrating hole of the concrete block forms a penetrating hole for a concrete column, wherein the lower end is blocked by the ground and the upper end is open; and a ground drilling section formation step, after the concrete block installation step, of drilling the ground located below the penetrating hole for the concrete column to form a ground drilling section which is a space continuous with the penetrating hole for the concrete column. After the above ground drilling section formation step, a composite column forming member is inserted into the concrete column through-hole and the ground drilling section, comprising: a precast concrete pile extending in the vertical direction; a column reinforcing bar assembly extending vertically upward from a lower portion connected to the interior of the precast concrete pile and protruding to the upper portion of the precast concrete pile; and a waterproof membrane in the form of a tube with both the upper and lower ends open, the lower portion connected to the upper portion of the precast concrete pile, and the column reinforcing bar assembly extending vertically along the interior thereof; after the above composite column forming member insertion step, concrete is poured inside the waterproof membrane to form a cast-in-place concrete column, and the composite column forming member is transformed into a composite concrete column in which the precast concrete pile and the cast-in-place concrete column are integrally formed through the column reinforcing bar assembly along the concrete column through-hole and the ground drilling section; and after the above composite concrete column forming step, a top concrete forming step is formed on the upper portion of the concrete block.

[0029] In the above, a filler injection passage is formed inside the precast concrete pile to connect the side of the precast concrete pile and the upper part of the precast concrete pile, and the composite column forming body includes a filler injection pipe that extends vertically upward along the interior of the waterproof membrane while its lower end is connected to the filler injection passage of the precast concrete pile, and it is preferable to further include an adhesive filler injection step after the composite concrete column forming step, wherein an adhesive filler is injected into the ground bore where the precast concrete pile is located through the filler injection pipe and the filler injection passage.

[0030] In the above, the step of forming the ground borehole involves inserting a ground protection tube extending in the vertical direction into the ground through the through-hole for the concrete column while borehole the ground located below the through-hole for the concrete column, wherein the inserted ground protection tube is positioned across the through-hole for the concrete column and the ground borehole, and the ground borehole is formed inside the inserted ground protection tube, and it is preferable to remove the ground protection tube after the step of inserting the composite column forming body.

[0031] In the above, during the concrete block installation step, a plurality of concrete blocks are installed on the upper part of the ground to form a concrete block assembly in which the plurality of concrete blocks are continuously arranged in the horizontal and vertical directions, and a through hole for the concrete column may be formed in which the vertical penetration hole of the plurality of concrete blocks continuously arranged in the vertical direction is continuous in the vertical direction, with the lower end blocked by the ground and the upper end open.

[0032]

[0033] Another concept of the present invention for solving the above problem is, in a concrete block structure, a concrete block installed on the upper part of the ground and having a vertical penetration hole formed extending in the vertical direction, and a composite concrete column provided along the vertical penetration hole and a ground perforation section formed by perforating the ground located below the vertical penetration hole; the composite concrete column includes a precast concrete pile located at the bottom and a cast-in-place concrete column located at the top of the precast concrete pile; the cast-in-place concrete column includes a column reinforcing bar assembly extending vertically upward from a lower end connected to the interior of the precast concrete pile and protruding to the upper part of the precast concrete pile, a waterproof membrane having an open bottom end connected to the upper end of the precast concrete pile and having the column reinforcing bar assembly extending vertically along its interior, and concrete cast and cured inside the waterproof membrane; and the precast concrete pile and the cast-in-place concrete column are integrally formed through the column reinforcing bar assembly. The ground on which the above concrete block is installed is a soft seabed formed on top of the seabed bedrock; the above ground drilling section is formed by drilling the soft seabed ground and the seabed bedrock; the vertical length of the above precast concrete pile is shorter than the vertical length of the above ground drilling section; the above cast-in-place concrete column is divided into a concrete column section for penetration located in the vertical penetration of the above concrete block and a concrete column section for soft ground located in the above seabed soft ground; the above concrete column section for soft ground is formed to support the bottom of the above concrete block while having a diameter larger than the diameter of the concrete column section for penetration.

[0034]

[0035] Another concept of the present invention for solving the above problem is, in a concrete block structure, a concrete block is installed on the upper part of the ground and has a vertical penetration hole formed extending in the vertical direction, and a composite concrete column is provided along the vertical penetration hole and a ground perforation section formed by perforating the ground located below the vertical penetration hole; the composite concrete column includes a precast concrete pile located at the bottom and a cast-in-place concrete column located at the top of the precast concrete pile; the cast-in-place concrete column includes a column reinforcing bar assembly extending vertically upward from a lower end connected to the interior of the precast concrete pile and protruding to the upper part of the precast concrete pile, a waterproof membrane having an open bottom end connected to the upper end of the precast concrete pile and having the column reinforcing bar assembly extend vertically along its interior, and concrete cast and cured inside the waterproof membrane; and the precast concrete pile and the cast-in-place concrete column are integrally formed through the column reinforcing bar assembly.

[0036] In the above, it is preferable that an adhesive filler is injected into the ground bore where the precast concrete pile is located so that the precast concrete pile is bonded to the ground.

[0037] In the above, the concrete blocks are provided in plurality, and the plurality of concrete blocks form a concrete block assembly arranged continuously in the horizontal and vertical directions, and the composite concrete column is preferably provided along the vertical penetration holes of the plurality of concrete blocks arranged continuously in the vertical direction and the ground drilling section.

[0038] In the above, it is preferable that a top layer of concrete be formed on the upper part of the concrete block.

[0039] In the above, the concrete block may include a concrete top plate, a concrete bottom plate provided spaced downward from the concrete top plate, and a vertical tube for connection in the form of a hollow tube, wherein the upper end is inserted and connected to the concrete top plate and the lower end is inserted and connected to the concrete bottom plate, the upper and lower middle part is exposed to the outside between the concrete top plate and the concrete bottom plate, and the upper and lower through hole is formed in the upper and lower direction.

[0040]

[0041] As described above, the present invention proposes a new type of construction method and a new concrete block structure thereby that can significantly increase the stability of a concrete block structure by forming a ground drilling section at the bottom of a through section for a concrete column of a concrete block, and forming a composite concrete column in which a precast concrete pile and a cast-in-place concrete column are integrally formed along the through section for the concrete column and the ground drilling section via a column reinforcement assembly.

[0042] In addition, since the present invention inserts a composite column structure in which a precast concrete pile and a waterproof membrane are integrated into a ground bore, problems such as damage to the waterproof membrane or difficulty in underwater insertion due to buoyancy can be solved all at once.

[0043] In the concrete block structure of the present invention, a plurality of concrete blocks are bound to the ground by composite concrete columns, thereby significantly improving the stability of the concrete block structure.

[0044] In addition, as a result of this improved stability, it becomes possible to drastically reduce the size of underwater concrete block structures compared to existing large caisson methods.

[0045] This is because even when the weight of the underwater concrete block structure and the frictional force of the underwater concrete block structure against the underwater ground are reduced, the bonding force to the underwater ground provided by the composite concrete columns compensates for this, allowing for sufficient stability.

[0046] FIG. 1 is a perspective view of a concrete block used in a construction method of an underwater concrete block structure according to a first embodiment of the present invention.

[0047] FIG. 2 is a conceptual plan view of a state in which a concrete block assembly is formed on the upper surface of an underwater ground by installing the concrete blocks of FIG. 1.

[0048] FIG. 3 is a conceptual cross-sectional view of FIG. 2.

[0049] FIGS. 4 to 9 are drawings illustrating, in sequence, the process of forming a ground bore after forming a concrete block assembly, inserting a composite column forming body, forming a composite concrete column, and forming a capping concrete.

[0050] FIG. 10 is a conceptual cross-sectional view showing the state of the composite column formation of FIG. 5 before assembly.

[0051] FIG. 11 is a conceptual cross-sectional view showing the assembled state of the composite column structure of FIG. 10.

[0052] FIG. 12 is a perspective view of a concrete block used in a construction method of an underwater concrete block structure according to a second embodiment of the present invention.

[0053] FIGS. 13 to 21 are drawings illustrating, in sequence, the process of forming an underwater concrete block structure on the upper surface of an underwater ground using the concrete block of FIG. 12.

[0054] FIG. 22 is a cross-sectional view of an underwater concrete block structure constructed according to the third embodiment of the present invention,

[0055] FIG. 23 is a drawing showing the cross-section of a plurality of concrete blocks used in FIG. 22 separated.

[0056] FIG. 24 is a cross-sectional view of an underwater concrete block structure constructed according to the fourth embodiment of the present invention,

[0057] FIG. 25 is a perspective view of a concrete block used in a construction method of an underwater concrete block structure according to the fifth embodiment of the present invention.

[0058] FIG. 26 is a cross-sectional view of the concrete block of FIG. 25,

[0059] FIG. 27 is a cross-sectional view of an underwater concrete block structure constructed according to the fifth embodiment of the present invention,

[0060] FIG. 28 is a cross-sectional view of an underwater concrete block structure constructed according to the 6th embodiment of the present invention,

[0061] FIG. 29 is a perspective view of a concrete block used in the construction method of an underwater concrete block structure according to the 7th embodiment of the present invention.

[0062] FIG. 30 is a conceptual cross-sectional view of an underwater concrete block structure constructed according to the seventh embodiment of the present invention.

[0063]

[0064] Embodiments of the present invention are described below with reference to the attached drawings so that those skilled in the art can easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification have been given similar reference numerals.

[0065] Throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0066]

[0067] First, a method for constructing a concrete block structure according to the first embodiment of the present invention will be explained.

[0068] FIG. 1 is a perspective view of a concrete block used in a construction method for an underwater concrete block structure according to a first embodiment of the present invention; FIG. 2 is a conceptual plan view of a state in which a concrete block assembly is formed on the upper surface of an underwater ground by installing the concrete block of FIG. 1; FIG. 3 is a conceptual cross-sectional view of FIG. 2; FIG. 4 to FIG. 9 are drawings illustrating, in sequence, the process of forming a ground bore after forming a concrete block assembly, inserting a composite column forming body, forming a composite concrete column, and forming a top concrete; FIG. 10 is a conceptual cross-sectional view showing the separated state and the assembled state of the composite column forming body of FIG. 5.

[0069] (1) Concrete block manufacturing stage

[0070] A concrete block (10) as shown in Fig. 1 is manufactured.

[0071] The shape of the concrete block (10) can be formed in various ways, but it is preferable to have at least two vertical penetration holes (11) extending in the vertical direction.

[0072] According to the embodiment, a space for filling or a space for other uses may be formed in the concrete block (10).

[0073] The vertical penetration hole (11) of the concrete block (10) may be a hole formed in the concrete block (10) as in FIG. 1, FIG. 12, FIG. 23, or FIG. 29, but as in FIG. 25, a vertical pipe (15) made of metal material for connection may be inserted into the upper concrete plate (13) and the lower concrete plate (14) arranged vertically, and the inside of the vertical pipe (15) for connection may be used as the vertical penetration hole (11).

[0074] In addition, the vertical penetration hole (11) of the concrete block (10) may change its planar cross-sectional area as it moves vertically, as shown in FIG. 3. When the vertical penetration hole (11) changes its planar cross-sectional area as it moves vertically, the cast-in-place concrete column (112), which will be described later, interlocks with it, thereby increasing the bonding strength.

[0075] However, in other embodiments, to make it easier to understand the core of the invention, the vertical penetration hole (11) is depicted as having the same cross-sectional area in a planar shape while facing vertically.

[0076] In the concrete block (10) of Fig. 1, the size of the vertical penetration hole (11) is greatly exaggerated for ease of understanding.

[0077] (2) Concrete block installation step

[0078] A plurality of concrete blocks (10) produced during the concrete block manufacturing stage are installed on the upper surface of the underwater ground (20) as shown in FIG. 3, thereby forming a concrete block assembly (100) in which a plurality of concrete blocks (10) are arranged continuously in a horizontal direction as shown in FIG. 2.

[0079] Figure 2 is a plan view of the installed state, and Figure 3 is a cross-sectional view of the installed state.

[0080] The vertical penetration hole (11) of the concrete block (10) forming the concrete block assembly (100) forms a through hole (101) for a concrete column, with the lower end blocked by the underwater ground (20) and the upper end open.

[0081] That is, in this embodiment, the concrete block (10) is manufactured in a large size and installed in only one layer in the vertical direction, and each vertical penetration hole (11) of each concrete block (10) functions as a penetration hole (101) for a concrete column.

[0082] In this embodiment, the concrete block (10) is installed on the upper part of the underwater ground (20), and the structure formed thereby becomes an underwater concrete block structure.

[0083] However, in some cases, the concrete block (10) may be installed on the ground above the land, in which case the concrete block structure becomes a land concrete block structure.

[0084] The underwater ground (20) of this embodiment corresponds to an underwater ground that is not artificially created, i.e., the seabed, but according to the embodiment, the underwater ground (20) may include a foundation ground artificially created for an underwater concrete block structure.

[0085] If a foundation ground is formed on the upper part of the underwater ground (20) and then a concrete block assembly (100) is formed, a foundation ground formation step is additionally required to form the foundation ground before the concrete block installation step.

[0086] The foundation ground may be any one of foundation rubble ground, replacement rubble ground, deep mixing treated ground, and soft ground improvement treated ground, or a combination thereof.

[0087] "Soft ground treated with soft ground improvement" refers to ground that has been improved using soft ground improvement methods, such as replacement, consolidation, dehydration, drainage, vibratory compaction, compacted sand piles, blasting, and chemical injection, when the ground is too soft to obtain the necessary bearing capacity.

[0088] Although a cross-sectional view of a concrete block assembly (100) is shown in FIG. 3, the concrete block assembly (100) is in a state where multiple concrete blocks (10) are arranged continuously in the horizontal direction as in FIG. 2.

[0089] In some cases, the concrete block structure constructed according to the present invention may be constructed using only one concrete block (10).

[0090] (3) Stage of forming the ground borehole

[0091] After the concrete block installation step, as shown in FIG. 4, the underwater ground (20) located below the through-hole (101) for the concrete column is drilled to form a ground drilling section (102) that is a space continuous with the through-hole (101) for the concrete column.

[0092] In this embodiment, a ground protection pipe (30) extending in the vertical direction is inserted into the underwater ground (20) in the vertical direction through a through hole (101) for a concrete column, and the underwater ground (20) located below the through hole (101) for a concrete column is drilled.

[0093] When the ground drilling section (102) is formed in this manner, the inserted ground protection pipe (30) is positioned across the concrete column through-hole (101) and the ground drilling section (102), and the ground drilling section (102) is formed inside the ground protection pipe (30).

[0094] At this time, the ground protection pipe (30) prevents the surrounding underwater ground (20) from collapsing into the ground drilling section (102) or various foreign substances from flowing into the ground drilling section (102) during or after the drilling operation.

[0095] In addition, the ground protection tube (30) may have the function of protecting the waterproof membrane (112a) when inserting the composite column forming body (110A) described later.

[0096] It is preferable that the length of the ground protection pipe (30) be longer than the sum of the length of the through-hole (101) for the concrete column and the length of the ground drilling section (102). This allows the insertion of the composite column forming body (110A) to be carried out easily.

[0097] Meanwhile, the ground protection pipe (30) is removed after the composite column forming step described later.

[0098] (4) Insertion step of the composite column formation

[0099] After the ground drilling section formation step, a composite column forming body (110A) is inserted into the concrete column through-hole (101) and the ground drilling section (102) as shown in FIG. 5.

[0100] In this embodiment, since the ground protection tube (30) is already positioned in the concrete column through-hole (101) and the ground drilling-hole (102), it is sufficient to insert the composite column forming body (110A) into the ground protection tube (30).

[0101] The structure of the composite column forming body (110A) will be explained with reference to FIGS. 10 and FIGS. 11.

[0102] The composite column forming body (110A) of the present embodiment includes a precast concrete pile (111), a waterproof membrane (112a), a reinforcing bar assembly for the column (112b), a filler injection pipe (113), a waterproof membrane protection pipe (114), a watertight packing (115), and a temporary fixing part (116) for the waterproof membrane protection pipe.

[0103] The precast concrete pile (111) is a concrete pile that extends in the vertical direction and is manufactured in advance, and the vertical length can be changed as much as needed depending on site conditions.

[0104] A filler injection passage (111a) is formed inside the precast concrete pile (111) to connect the side of the precast concrete pile (111) and the top of the precast concrete pile (111).

[0105] That is, the filler injection passage (111a) consists of a vertical passage (111a-1) extending vertically downward from the upper part of the precast concrete pile (111), and a horizontal passage (111a-2) extending horizontally in four directions toward the side of the precast concrete pile (111) from the vertical passage (111a-1).

[0106] A filler injection pipe (113) is connected to the filler injection passage (111a) formed at the top of the precast concrete pile (111).

[0107] The filler injection pipe (113) extends vertically upward from the lower part connected to the filler injection passage (111a).

[0108] Accordingly, when the adhesive filler (111b) is injected into the upper part of the filler injection pipe (113), the adhesive filler (111b) moves downward through the vertical passage (111a-1) of the filler injection pipe (113) and the filler injection passage (111a), and then can be ejected outward from the side of the precast concrete pile (111) through the horizontal passage (111a-2) of the filler injection passage (111a).

[0109] The waterproof membrane (112a) and the reinforcing bar assembly (112b) for the column are intended to produce a cast-in-place concrete column (112).

[0110] The column reinforcing assembly (112b) extends vertically upward from the lower end connected to the interior of the precast concrete pile (111) and protrudes upward from the precast concrete pile (111).

[0111] The upper portion of the vertical reinforcing bar of the column reinforcing bar assembly (112b) is screw-machined to form a male screw portion (112b-1). Alternatively, a reinforcing bar with a male screw portion (112b-1) formed thereon may be connected to the upper portion of the vertical reinforcing bar of the column reinforcing bar assembly (112b) through a reinforcing bar coupler or the like.

[0112] The waterproof membrane (112a) is in the form of a tube with both the top and bottom open, the bottom end of which is connected to the top end of the precast concrete pile (111), and a column reinforcing assembly (112b) and a filler injection pipe (113) extend vertically along the inside.

[0113] In this embodiment, the lower end of the waterproof membrane (112a) is adhered and fixed to the upper end of the precast concrete pile (111), so water does not enter the interior of the waterproof membrane (112a).

[0114] Therefore, there is no risk of the column reinforcement assembly (112b) placed inside the waterproof membrane (112a) coming into contact with water.

[0115] In this embodiment, a waterproofing protective tube (114) is temporarily placed on the upper part of a precast concrete pile (111), and a waterproofing membrane (112a), a column reinforcing bar assembly (112b), and a filler injection tube (113) extend in the vertical direction along the inside of the waterproofing protective tube (114).

[0116] In order to enable watertightness through the waterproofing protective tube (114), a watertight packing (115) is provided at the upper end of the precast concrete pile (111), and the lower end of the waterproofing protective tube (114) is in close contact with the watertight packing (115).

[0117] In this embodiment, the watertight packing (115) is adhesively fixed to the upper part of the precast concrete pile (111), more specifically to the lower part of the waterproof membrane (112a).

[0118] Therefore, water does not enter the interior of the waterproof protective tube (114).

[0119] According to an embodiment, the watertight packing (115) may not be fixed to the precast concrete pile (111) or the waterproof membrane (112a), but may be fixedly connected to the bottom of the waterproof membrane protection tube (114).

[0120] In this embodiment, the waterproof membrane (112a) is located inside the waterproof membrane protection tube (114), but in some embodiments, the waterproof membrane (112a) may be placed outside the waterproof membrane protection tube (114) and extend in the vertical direction along the waterproof membrane protection tube (114).

[0121] As in the present embodiment, when the waterproof membrane (112a) is placed inside the waterproof membrane protection tube (114), water does not enter the waterproof membrane protection tube (114), thereby fundamentally preventing the waterproof membrane (112a) from receiving excessive water pressure, and furthermore, the waterproof membrane (112a) can be prevented from being damaged by contact with the outside.

[0122] According to an embodiment, if the waterproof membrane (112a) is placed outside the waterproof membrane protection tube (114), the waterproof membrane protection tube (114) can prevent excessive deformation of the waterproof membrane (112a) even when the waterproof membrane (112a) is subjected to excessive water pressure, thereby preventing damage to the waterproof membrane (112a).

[0123] Meanwhile, the top of the waterproof membrane (112a) is temporarily fixed to the top of the waterproof membrane protection tube (114).

[0124] The temporary fixing part (116) for the waterproofing membrane protective tube is for temporarily fixing the upper part of the waterproofing membrane protective tube (114) to the upper part of the column reinforcing bar assembly (112b).

[0125] The temporary fixing part (116) for the waterproof membrane protective tube includes a protective tube fixing member (116a) and a nut member (116b), etc.

[0126] The protective tube fixing member (116a) is composed of a perforated plate (116a-1) having a plurality of through holes (116a-1a) formed therein and supporting the upper end of the waterproof protective tube (114) on its lower surface, and an edge ring (116a-2) provided along the edge of the perforated plate (116a-1) and having the outer surface of the waterproof protective tube (114) seated inside.

[0127] The nut member (116b) is screwed into the male screw portion (112b-1) formed at the top of the column reinforcing bar assembly (112b).

[0128] A male threaded portion (112b-1) formed on the upper end of the vertical reinforcing bar of the reinforcing bar assembly (112b) is made to protrude above the protective tube fixing member (116a) by penetrating the through hole (116a-1a) of the protective tube fixing member (116a), and the upper end of the waterproof membrane protective tube (114) is inserted into the edge ring (116a-2) of the protective tube fixing member (116a). When a nut member (116b) is screwed onto the male threaded portion (112b-1), the nut member (116b) presses against the protective tube fixing member (116a), and the waterproof membrane protective tube (114) is temporarily fixedly installed on the precast concrete pile (111).

[0129] The upper end of the filler injection tube (113) protrudes above the upper end of the protective tube fixing member (116a).

[0130] (5) Composite concrete column formation stage

[0131] After the step of inserting the composite column forming body, concrete is poured inside the waterproof membrane (112a) to form a cast-in-place concrete column (112).

[0132] Accordingly, the composite column forming body (100A) is transformed into a composite concrete column (100B) in which a precast concrete pile (111) and a cast-in-place concrete column (112) are integrally formed through a column reinforcing assembly (112b) along the concrete column through-hole (101) and the ground drilling hole (102).

[0133] The step of forming the composite concrete column of this embodiment is carried out step by step as shown in FIGS. 6 and FIGS. 7.

[0134] First, after the step of inserting the composite column forming body, the ground protection pipe (30) is removed as shown in Fig. 6.

[0135] Next, as shown in FIG. 7, while removing the temporary fixing part (116) for the waterproof membrane protection tube and the waterproof membrane protection tube (114), concrete (112c) is poured into the interior of the waterproof membrane (112a) to form a cast-in-place concrete column (112) in which a reinforcing bar assembly (112b) for the column is embedded inside.

[0136] To explain more specifically, when concrete (112c) is poured into the interior of the waterproof membrane (112a), the waterproof membrane (112a) opens up due to the pressure of the concrete (112c) and adheres to the through-hole (101) for the concrete column, etc., and after the curing process, the poured concrete (112c) becomes a cast-in-place concrete column (112).

[0137] A cast-in-place concrete column (112) has a column reinforcement assembly (112b) embedded therein, and since the lower end of the column reinforcement assembly (112b) is connected to the interior of a precast concrete pile (111), the cast-in-place concrete column (112) and the precast concrete pile (111) are formed integrally through the column reinforcement assembly (112b) to form a composite concrete column (100B).

[0138] (6) Step of injecting adhesive filler

[0139] After the composite concrete column formation stage, as shown in FIG. 8, an adhesive filler (111b) is injected into the ground drilling section (102) where the precast concrete pile (111) is located through the filler injection pipe (113).

[0140] This step is intended to fill the empty space where the ground protection pipe (30) has been removed in the ground drilling section (102) with an adhesive filler (111b) so that the precast concrete pile (111) can be strongly bonded to the underwater ground (20).

[0141] More specifically, when an underwater adhesive filler (111b), such as grout or mortar, is injected into the filler injection pipe (113), the underwater adhesive filler (111b) moves downward through the filler injection pipe (113) and the filler injection passage (111a) (vertical passage (111a-1)) of the precast concrete pile (111), and then is ejected toward the side outside of the precast concrete pile (111) through the filler injection passage (111a) (horizontal passage (111a-2)), thereby filling the empty space of the ground drilling section (102) where the precast concrete pile (111) is located.

[0142] By this, the precast concrete pile (111) is strongly bonded to the underwater ground (20).

[0143] (7) Step of forming the upper concrete

[0144] After the step of injecting adhesive filler, the upper concrete (120) is formed on the upper part of the concrete block assembly (100) as shown in FIG. 9 to complete the underwater concrete block structure (200).

[0145] At this time, the upper part of the column reinforcing assembly (112b) protruding above the through-hole (101) for the concrete column is connected to the internal reinforcing bar of the upper concrete (120).

[0146] Through this construction method, an underwater concrete block structure (200) is completed in which the upper concrete (120) and the concrete block assembly (100) are integrally joined to the underwater ground (20) via a composite concrete column (110B).

[0147] As described above, a composite concrete column (110B) and a top concrete (120) are formed in the concrete block assembly (100) to complete the underwater concrete block structure (200).

[0148] Explains the role of the composite concrete column (110B) in the underwater concrete block structure (200).

[0149] In addition, a plurality of concrete blocks (10) forming a concrete block assembly (100) are bound to the underwater ground (20) by a composite concrete column (110B).

[0150] Therefore, in order to evaluate the stability of the underwater concrete block structure (200) of the present embodiment, in addition to the weight of the underwater concrete block structure (200) and the frictional force of the underwater concrete block structure (200) against the underwater ground (20), the bonding force to the underwater ground (20) by the composite concrete column (110B) must also be considered.

[0151] That is, the underwater concrete block structure (200) has significantly improved stability due to the bonding force to the underwater ground (20) by the composite concrete column (110B).

[0152] As a result of this improved stability, it is possible to drastically reduce the size of the underwater concrete block structure (200) when it is sufficient to have the same stability as the existing large caisson.

[0153] That is, even when the weight of the underwater concrete block structure (200) and the frictional force of the underwater concrete block structure (200) against the underwater ground (20) are reduced, the bonding force to the underwater ground (20) by the composite concrete column (110B) compensates for this, so that sufficient stability can be achieved.

[0154] Of course, an underwater concrete block structure (200) having a weight and volume similar to a conventional structure has significantly improved stability compared to a conventional structure.

[0155]

[0156] A second embodiment according to the present invention will be described below.

[0157] Below, only the differences from the first embodiment are mainly explained, and the parts identical to the first embodiment are omitted.

[0158] FIG. 12 is a perspective view of a concrete block used in a construction method for an underwater concrete block structure according to a second embodiment of the present invention, and FIG. 13 to 21 are drawings illustrating, in sequence, the process of forming an underwater concrete block structure on the upper surface of an underwater ground using the concrete block of FIG. 12.

[0159] (1) Concrete block manufacturing stage

[0160] In this embodiment, a relatively small concrete block (10) as shown in FIG. 12 is manufactured.

[0161] (2) Concrete block installation step

[0162] A plurality of concrete blocks (10) produced during the concrete block manufacturing stage are installed on the upper part of the underwater ground (20) to form a concrete block assembly (100) in which a plurality of concrete blocks (10) are arranged continuously in the horizontal and vertical directions as shown in FIGS. 14 and 15.

[0163] In FIG. 15, it can be seen that concrete blocks (10) are arranged continuously in the vertical direction, but the concrete block assembly (100) is also arranged in a horizontal direction in which multiple concrete blocks (10) are arranged continuously. Since this structure of continuous arrangement of multiple concrete blocks (10) in the horizontal direction is a general technique, a detailed description is omitted.

[0164] In the concrete block assembly (100), a vertical penetration hole (11) of a plurality of concrete blocks (10) arranged in a vertical direction is formed, and a concrete column through hole (101) is formed in the vertical direction, with the lower end blocked by the underwater ground (20) and the upper end open.

[0165] That is, in this embodiment, the concrete blocks (10) are installed in two or more layers in the vertical direction, and the vertical penetration holes (11) of the multiple concrete blocks (10) stacked in the vertical direction are combined to form a single through hole (101) for a concrete column.

[0166] I will explain this process in more detail.

[0167] As shown in Fig. 13, a concrete block (10) is installed on the upper part of the underwater ground (20).

[0168] Afterwards, as shown in Fig. 14, a ground protection pipe (30) is installed in the vertical penetration hole (11) of a concrete block (10) installed on the underwater ground (20), and other concrete blocks (10) are continuously installed using the ground protection pipe (30).

[0169] At this time, an upper insertion guide (31) is temporarily provided at the top of the ground protection tube (30). The upper insertion guide (31) is detachably connected to the top of the ground protection tube (30) and has a tapered shape toward the top.

[0170] The upper insertion guide (31) is intended to allow the upper part of the ground protection pipe (30) to be easily inserted into the vertical penetration hole (11) of the concrete block (10) to be installed.

[0171] After Fig. 14, a concrete block assembly (100) is formed as shown in Fig. 15.

[0172] When the concrete block assembly (100) is formed, the upper insertion guide (31) of the ground protection pipe (30) is removed.

[0173] Subsequently, the ground drilling step of FIG. 16, the composite column forming step of FIG. 17, the composite concrete column forming step of FIG. 18 and FIG. 19, the adhesive filler injection step of FIG. 20, and the upper concrete forming step of FIG. 21 are carried out sequentially.

[0174] The role of the composite concrete column (110B) in the underwater concrete block structure (200) of this embodiment is explained.

[0175] In this embodiment, compared to the first embodiment, not only are a plurality of concrete blocks (10) bound to the underwater ground (20) by a composite concrete column (110B), but a plurality of concrete blocks (10) arranged continuously in the vertical direction are also bound to each other by the composite concrete column (110B), so that the concrete block assembly (100) has structural integrity.

[0176]

[0177] An underwater concrete block structure constructed according to the third embodiment of the present invention will be described below.

[0178] FIG. 22 is a cross-sectional view of an underwater concrete block structure constructed according to the third embodiment of the present invention, and FIG. 23 is a drawing showing the cross-sections of a plurality of concrete blocks used in FIG. 22 separated.

[0179] In FIG. 22, after a portion of the underwater ground (20) is excavated, a replacement rubble ground (21) is formed as a foundation ground, and after a foundation rubble ground (22) is formed on top of the replacement rubble ground (21), an underwater concrete block structure (200) is constructed on top of the foundation rubble ground (22).

[0180] In other words, the foundation ground preparation stage was carried out prior to the concrete block installation stage.

[0181] In addition, in FIG. 22, a filling step was added after the concrete block assembly (100) and composite concrete column (110B) were formed.

[0182] That is, as can be seen in FIG. 23, a filling space (12) is formed inside a plurality of concrete blocks (10).

[0183] The filling space (12) of such a concrete block (10) is filled with a filling material (130) (sand, gravel, or rubble, etc.) after forming a concrete block assembly (100).

[0184]

[0185] The following describes an underwater concrete block structure constructed according to the fourth embodiment of the present invention.

[0186] FIG. 24 is a cross-sectional view of an underwater concrete block structure constructed according to the third embodiment of the present invention.

[0187] In FIG. 24, after improving a part of the underwater ground (20) into a deep mixing treatment ground (23), a foundation rubble ground (22) is formed on top of the deep mixing treatment ground (23), and then an underwater concrete block structure (200) is constructed on top of the foundation rubble ground (22).

[0188] That is, in this embodiment, as the foundation ground, a deep mixed treatment ground (23) and a foundation rubble ground (22) were combined.

[0189] In other words, the foundation ground preparation stage was carried out prior to the concrete block installation stage.

[0190] In addition, in FIG. 24, a filling step was added after the concrete block assembly (100) and composite concrete column (110B) were formed.

[0191] That is, after forming a concrete block assembly (100), a filling material (130) (sand, gravel, or rubble, etc.) is filled.

[0192]

[0193] The following describes an underwater concrete block structure constructed according to the fifth embodiment of the present invention.

[0194] FIG. 25 is a perspective view of a concrete block used in a method for constructing an underwater concrete block structure according to the fifth embodiment of the present invention, FIG. 26 is a cross-sectional view of the concrete block of FIG. 25, and FIG. 27 is a cross-sectional view of an underwater concrete block structure constructed according to the fifth embodiment of the present invention.

[0195] The concrete block (10) of this embodiment is composed of a concrete top plate (13), a concrete bottom plate (14), and a vertical pipe (15) for connection, as shown in FIGS. 25 and 26.

[0196] The concrete top plate (13) and the concrete bottom plate (14) are spaced apart from each other in the vertical direction so that seawater can flow between them.

[0197] Depending on the embodiment, other components may be added between the concrete top plate (13) and the concrete bottom plate (14).

[0198] The connecting vertical pipe (15) has its upper end inserted and connected to the concrete top plate (13), its lower end inserted and connected to the concrete bottom plate (14), and its upper and lower middle end exposed to the outside between the concrete top plate (13) and the concrete bottom plate (14).

[0199] In addition, the vertical tube (15) for connection is in the form of a hollow tube in which an upper and lower through hole (11) is formed in the upper and lower direction.

[0200] Using such a concrete block (10), an underwater concrete block structure (200) as shown in FIG. 27 is formed.

[0201] In FIG. 27, the composite concrete column (110B) is formed along the concrete column through-hole (11) and ground drilling section, in which the vertical penetration holes (11) of the connecting vertical pipe (15) are formed vertically in a continuous manner.

[0202] In FIG. 27, a foundation rubble ground (22) was prepared in advance on top of the underwater ground (20), and then an underwater concrete block structure (200) was constructed on top of the foundation rubble ground (22).

[0203] In addition, a concrete block (24) for reinforcement is placed on one side of the foundation rubble ground (22), and the concrete block (24) also has an upper and lower through hole formed therein.

[0204] The concrete block (24) can be seen as a modified form of the concrete block (10) of FIG. 13.

[0205] As described above, the foundation ground preparation stage was carried out prior to the concrete block installation stage.

[0206] The underwater concrete block structure (200) of this embodiment creates an environment in which seawater can freely flow inside.

[0207] That is, seawater can flow freely through the outside of the connecting vertical pipe (15), and a cast-in-place concrete column is formed through the inside of the connecting vertical pipe (15), so that a plurality of concrete blocks (10) are connected to each other.

[0208] Through this embodiment, it can be seen that the shape of the concrete block can be modified in a wide variety of ways.

[0209]

[0210] An underwater concrete block structure constructed according to the 6th embodiment of the present invention will be described below.

[0211] FIG. 28 is a cross-sectional view of an underwater concrete block structure constructed according to the 6th embodiment of the present invention.

[0212] In this embodiment, the underwater ground (20) consists of a seabed bedrock (25) and a seabed soft ground (26) formed on top of the seabed bedrock (25).

[0213] Generally, when a structure is installed on soft seabed ground (26), subsidence of the structure becomes a problem, and this embodiment provides a structure that can prevent this.

[0214] A plurality of concrete blocks (10) are installed on the soft seabed ground (26) to form a concrete block assembly (100), and an underwater concrete block structure (200) is formed through the same process as before.

[0215] In the ground drilling section formation stage, the seabed soft ground (26) and seabed bedrock (25) are drilled to form a ground drilling section in the seabed soft ground (26) and seabed bedrock (25).

[0216] The vertical length of the precast concrete pile (111) of the composite column forming body (100A) is shorter than the vertical length of the ground drilling section, and the lower end of the precast concrete pile (111) is located on the seabed bedrock (25).

[0217] The waterproof membrane (112a) has a structure that allows its diameter to be expanded by means of a structure (e.g., a structure that unfolds from a folded state) or a material (e.g., an elastic material that can be stretched) so as to form a concrete column portion (112B) for soft ground described later.

[0218] When concrete is poured into the interior of such a waterproof membrane (112a), the waterproof membrane (112a) located on the soft seabed ground (26) is pushed out by the pressure of the poured concrete, and its diameter expands significantly.

[0219] Accordingly, the cast-in-place concrete column (112) of the present embodiment can be divided into a concrete column part (112A) for a penetration hole located in the vertical penetration hole (11) of the concrete block (10) and a concrete column part (112B) for a soft ground located in the soft ground (26) of the seabed.

[0220] The concrete column portion (112B) for soft ground has a diameter larger than that of the concrete column portion (112A) for penetration and supports the bottom of the concrete block (10), thereby preventing subsidence of the underwater concrete block structure (200).

[0221]

[0222] The following describes an underwater concrete block structure constructed according to the 7th embodiment of the present invention.

[0223] FIG. 29 is a perspective view of a concrete block used in the method of constructing an underwater concrete block structure according to the 7th embodiment of the present invention, and FIG. 30 is a conceptual cross-sectional view of an underwater concrete block structure constructed according to the 7th embodiment of the present invention.

[0224] A concrete block (10) as shown in FIG. 29 can be used to form a structure for a fixed offshore wind foundation as shown in FIG. 30 by applying the construction method according to the present invention.

[0225] The concrete block (10) of FIG. 29 can be seen as a modified form of the concrete block (10) of FIG. 12.

[0226] In this embodiment, the concrete blocks (10) are installed in four layers on the underwater ground (20), but this can be changed in various ways.

[0227]

[0228] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art to which the present invention pertains can implement the present invention in various forms.

[0229] Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single unit may be implemented in a distributed manner, and components described as distributed may likewise be implemented in a combined form.

[0230] The scope of the present invention is defined by the claims set forth below.

[0231]

[0232] The present invention can be used to construct berthing facilities for ports, breakwater structures installed on the coast, breakwaters, fixed wind turbine foundations, etc.

Claims

1. A concrete block manufacturing step for producing a concrete block having vertical penetration holes extending in the vertical direction; A concrete block installation step in which the concrete block produced in the above concrete block production step is installed on the upper part of the ground, wherein the vertical penetration hole of the concrete block is formed such that the lower end is blocked by the ground and the upper end is open, thereby forming a through hole for a concrete column; After the above concrete block installation step, a ground drilling section formation step of drilling the ground located below the through-hole for the concrete column to form a ground drilling section that is a space continuous with the through-hole for the concrete column; A composite column forming step, wherein, after the above ground drilling section formation step, a composite column forming member is inserted into the concrete column through-hole and the ground drilling section, the composite column forming member comprising a precast concrete pile extending in the vertical direction, a column reinforcing bar assembly extending vertically upward from a lower portion connected to the interior of the precast concrete pile and protruding to the upper portion of the precast concrete pile, and a waterproof membrane in the form of a tube with both the upper and lower ends open, wherein the lower portion is connected to the upper portion of the precast concrete pile and the column reinforcing bar assembly extends in the vertical direction along the interior thereof; A composite concrete column formation step in which, after the above-mentioned composite column forming body insertion step, concrete is poured inside the above-mentioned waterproof membrane to form a cast-in-place concrete column, and the above-mentioned composite column forming body is transformed into a composite concrete column in which the above-mentioned precast concrete pile and the above-mentioned cast-in-place concrete column are integrally formed through the above-mentioned column reinforcing bar assembly along the above-mentioned concrete column through-hole and the above-mentioned ground drilling hole; Includes, The ground on which the above concrete blocks are installed is underwater ground, and The above composite column forming body comprises a waterproof membrane protective tube that is temporarily placed on the upper part of the precast concrete pile and extends vertically along the interior of the waterproof membrane protective tube, a watertight packing provided at the upper part of the precast concrete pile to ensure the lower end of the waterproof membrane protective tube is in close contact, and a temporary fixing part for the waterproof membrane protective tube that temporarily fixes the upper end of the waterproof membrane protective tube to the upper part of the column reinforcing bar assembly. A method for constructing a concrete block structure characterized by removing the temporary fixing part for the waterproofing membrane protective pipe and the waterproofing membrane protective pipe during the above composite concrete column formation step.

2. In Paragraph 1, A filler injection passage is formed inside the precast concrete pile to connect the side of the precast concrete pile and the top of the precast concrete pile, and The above composite column forming body further includes a filler injection pipe that extends vertically upward while its lower end is connected to the filler injection passage of the precast concrete pile, and A method for constructing a concrete block structure, characterized by further including an adhesive filler injection step after the above-mentioned composite concrete column forming step, wherein an adhesive filler is injected into the ground bore where the precast concrete pile is located through the filler injection pipe and the filler injection passage.

3. In Paragraph 1, The step of forming the ground drilling section above involves drilling the ground located below the concrete column through-hole while inserting a ground protection tube extending in the vertical direction into the ground through the concrete column through-hole, wherein the inserted ground protection tube is positioned across the concrete column through-hole and the ground drilling section, and the ground drilling section is formed inside the inserted ground protection tube. A method for constructing a concrete block structure characterized by removing the ground protection pipe after the step of inserting the composite column forming body.

4. In Paragraph 1, A method for constructing a concrete block structure, characterized in that, in the step of installing the concrete blocks, a plurality of concrete blocks are installed on the upper surface of the ground to form a concrete block assembly in which the plurality of concrete blocks are arranged continuously in the horizontal and vertical directions, and a through hole for a concrete column is formed in the vertical direction of the plurality of concrete blocks arranged continuously in the vertical direction, with the lower end blocked by the ground and the upper end open.

5. In Paragraph 1, The ground on which the above concrete blocks are installed is underwater ground, and The above underwater ground includes a foundation ground artificially created for an underwater concrete block structure, and Prior to the above-mentioned concrete block installation step, a foundation ground preparation step for preparing the above-mentioned foundation ground is included, and A method for constructing a concrete block structure, characterized in that the above-mentioned foundation ground is one of a foundation rubble ground, a replacement rubble ground, a deep mixing treatment ground, a soft ground improvement treatment ground, or a combination thereof.

6. In Paragraph 1, A method for constructing a concrete block structure, characterized in that the above concrete block comprises a concrete top plate, a concrete bottom plate provided spaced downward from the concrete top plate, and a vertical pipe for connection in the form of a hollow tube, wherein the upper end is inserted and connected to the concrete top plate and the lower end is inserted and connected to the concrete bottom plate, the middle part in the vertical direction is exposed to the outside between the concrete top plate and the concrete bottom plate, and the vertical penetration hole is formed in the vertical direction.

7. A concrete block manufacturing step for producing a concrete block having vertical penetration holes extending in the vertical direction; A concrete block installation step in which the concrete block produced in the above concrete block production step is installed on the upper part of the ground, wherein the vertical penetration hole of the concrete block is formed such that the lower end is blocked by the ground and the upper end is open, thereby forming a through hole for a concrete column; After the above concrete block installation step, a ground drilling section formation step of drilling the ground located below the through-hole for the concrete column to form a ground drilling section that is a space continuous with the through-hole for the concrete column; A composite column forming step, wherein, after the above ground drilling section formation step, a composite column forming member is inserted into the concrete column through-hole and the ground drilling section, the composite column forming member comprising a precast concrete pile extending in the vertical direction, a column reinforcing bar assembly extending vertically upward from a lower portion connected to the interior of the precast concrete pile and protruding to the upper portion of the precast concrete pile, and a waterproof membrane in the form of a tube with both the upper and lower ends open, wherein the lower portion is connected to the upper portion of the precast concrete pile and the column reinforcing bar assembly extends in the vertical direction along the interior thereof; A composite concrete column formation step in which, after the above-mentioned composite column forming body insertion step, concrete is poured inside the above-mentioned waterproof membrane to form a cast-in-place concrete column, and the above-mentioned composite column forming body is transformed into a composite concrete column in which the above-mentioned precast concrete pile and the above-mentioned cast-in-place concrete column are integrally formed through the above-mentioned column reinforcing bar assembly along the above-mentioned concrete column through-hole and the above-mentioned ground drilling hole; After the above composite concrete column forming step, a top concrete forming step of forming top concrete on the upper part of the concrete block; is included, The ground on which the above concrete blocks are installed is a soft seabed formed on top of the seabed bedrock, and In the above ground drilling section formation step, the seabed soft ground and the seabed bedrock are drilled to form the ground drilling section in the seabed soft ground and the seabed bedrock, The vertical length of the above-mentioned precast concrete pile is shorter than the vertical length of the above-mentioned ground bore, and The above-mentioned cast-in-place concrete column is divided into a concrete column section for penetration located in the vertical penetration of the concrete block and a concrete column section for soft ground located in the soft seabed. A method for constructing a concrete block structure characterized in that the concrete column portion for soft ground is formed to support the bottom of the concrete block while having a diameter larger than the diameter of the concrete column portion for penetration.

8. A concrete block manufacturing step for producing a concrete block having vertical penetration holes extending in the vertical direction; A concrete block installation step in which the concrete block produced in the above concrete block production step is installed on the upper part of the ground, wherein the vertical penetration hole of the concrete block is formed such that the lower end is blocked by the ground and the upper end is open, thereby forming a through hole for a concrete column; After the above concrete block installation step, a ground drilling section formation step of drilling the ground located below the through-hole for the concrete column to form a ground drilling section that is a space continuous with the through-hole for the concrete column; A composite column forming step, wherein, after the above ground drilling section formation step, a composite column forming member is inserted into the concrete column through-hole and the ground drilling section, the composite column forming member comprising a precast concrete pile extending in the vertical direction, a column reinforcing bar assembly extending vertically upward from a lower portion connected to the interior of the precast concrete pile and protruding to the upper portion of the precast concrete pile, and a waterproof membrane in the form of a tube with both the upper and lower ends open, wherein the lower portion is connected to the upper portion of the precast concrete pile and the column reinforcing bar assembly extends in the vertical direction along the interior thereof; A composite concrete column formation step in which, after the above-mentioned composite column forming body insertion step, concrete is poured inside the above-mentioned waterproof membrane to form a cast-in-place concrete column, and the above-mentioned composite column forming body is transformed into a composite concrete column in which the above-mentioned precast concrete pile and the above-mentioned cast-in-place concrete column are integrally formed through the above-mentioned column reinforcing bar assembly along the above-mentioned concrete column through-hole and the above-mentioned ground drilling hole; A method for constructing a concrete block structure characterized by including a step of forming a top concrete on the upper part of the concrete block after the step of forming a composite concrete column.

9. In Paragraph 8, A filler injection passage is formed inside the precast concrete pile to connect the side of the precast concrete pile and the top of the precast concrete pile, and The above composite column forming body includes a filler injection pipe that extends vertically upward along the interior of the waterproofing membrane, with its lower end connected to the filler injection passage of the precast concrete pile. A method for constructing a concrete block structure, characterized by further including an adhesive filler injection step after the above-mentioned composite concrete column forming step, wherein an adhesive filler is injected into the ground bore where the precast concrete pile is located through the filler injection pipe and the filler injection passage.

10. In Paragraph 8, The step of forming the ground drilling section above involves drilling the ground located below the concrete column through-hole while inserting a ground protection tube extending in the vertical direction into the ground through the concrete column through-hole, wherein the inserted ground protection tube is positioned across the concrete column through-hole and the ground drilling section, and the ground drilling section is formed inside the inserted ground protection tube. A method for constructing a concrete block structure characterized by removing the ground protection pipe after the step of inserting the composite column forming body.

11. In Paragraph 8, A method for constructing a concrete block structure, characterized in that, in the step of installing the concrete blocks, a plurality of concrete blocks are installed on the upper surface of the ground to form a concrete block assembly in which the plurality of concrete blocks are arranged continuously in the horizontal and vertical directions, and a through hole for a concrete column is formed in the vertical direction of the plurality of concrete blocks arranged continuously in the vertical direction, with the lower end blocked by the ground and the upper end open.

12. A concrete block installed on the upper part of the ground and having an upward and downward penetrating hole extending in the vertical direction, and a composite concrete column is provided along the upward and downward penetrating hole and the ground drilled at the lower part of the upward and downward penetrating hole to form a ground drilled; The above composite concrete column includes a precast concrete pile located at the bottom and a cast-in-place concrete column located at the top of the precast concrete pile; The above-mentioned cast-in-place concrete column comprises: a column reinforcing bar assembly extending vertically upward from a lower portion connected to the interior of the precast concrete pile and protruding to the upper portion of the precast concrete pile; a waterproof membrane having an open lower portion connected to the upper portion of the precast concrete pile, through which the column reinforcing bar assembly extends vertically; and concrete cast and cured within the waterproof membrane; The above-mentioned precast concrete pile and the above-mentioned cast-in-place concrete column are integrally formed through the above-mentioned column reinforcement assembly; The ground on which the above concrete blocks are installed is a soft seabed formed on top of the seabed bedrock; The above ground drilling section is formed by drilling the above soft seabed ground and the above seabed bedrock; The vertical length of the above-mentioned precast concrete pile is shorter than the vertical length of the above-mentioned ground bore; The above-mentioned cast-in-place concrete column is divided into a concrete column section for penetration located in the vertical penetration of the above-mentioned concrete block and a concrete column section for soft ground located in the above-mentioned soft seabed ground; A concrete block structure characterized by the above-mentioned concrete column for soft ground having a diameter larger than the diameter of the above-mentioned concrete column for penetration and being formed to support the lower end of the concrete block.

13. A concrete block installed on the upper part of the ground and having an upward and downward penetrating hole extending in the vertical direction, and a composite concrete column is provided along the upward and downward penetrating hole and the ground drilled at the lower part of the upward and downward penetrating hole to form a ground drilled; The above composite concrete column includes a precast concrete pile located at the bottom and a cast-in-place concrete column located at the top of the precast concrete pile; The above-mentioned cast-in-place concrete column comprises: a column reinforcing bar assembly extending vertically upward from a lower portion connected to the interior of the precast concrete pile and protruding to the upper portion of the precast concrete pile; a waterproof membrane having an open lower portion connected to the upper portion of the precast concrete pile, through which the column reinforcing bar assembly extends vertically; and concrete cast and cured within the waterproof membrane; The above-mentioned precast concrete pile and the above-mentioned cast-in-place concrete column are integrally formed through the above-mentioned column reinforcement assembly; A concrete block structure characterized by 14. In Paragraph 13, A concrete block structure characterized by the fact that an adhesive filler is injected into the ground bore where the precast concrete pile is located, thereby bonding the precast concrete pile to the ground.

15. In Paragraph 13, The above concrete blocks are provided in multiple quantities, and The above plurality of concrete blocks form a concrete block assembly in which they are continuously arranged in the horizontal and vertical directions, and The above composite concrete column is a concrete block structure characterized by being provided along the vertical penetration holes of a plurality of concrete blocks arranged continuously in the vertical direction and the ground drilling section.

16. In Paragraph 13, A concrete block structure characterized by having a top layer of concrete formed on the upper part of the above concrete block.

17. In Paragraph 13, A concrete block structure characterized by comprising: a concrete top plate; a concrete bottom plate provided spaced downward from the concrete top plate; and a vertical connecting tube in the form of a hollow tube, wherein the upper end is inserted and connected to the concrete top plate and the lower end is inserted and connected to the concrete bottom plate, the upper and lower middle part is exposed to the outside between the concrete top plate and the concrete bottom plate, and the upper and lower through hole is formed in the upper and lower direction.

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