Connector for file and construction method for using that

Abstract

The present invention describes various embodiments related to a pile connecting device and a pile construction method using the same, wherein a first connecting member having a plurality of first bolt fastening holes formed at the bottom of a first pile is disposed, and a second connecting member having a plurality of second bolt fastening holes formed at the top of a second pile is disposed, and in this state, when the first and second connecting members face each other, the plurality of first and second bolt fastening holes are coupled with the heads of first and second bolts protruding from the first and second connecting members to prevent one end of the first pile and the top of the second pile from being misaligned with each other, thereby facilitating the progress of welding work to connect the first and second piles. According to one embodiment, such a pile connecting device may include first and second connecting members and a plurality of first and second bolt fastening holes; and various other embodiments are also possible.

Description

Technology Field

[0001] The present invention relates to a pile connection device and a pile construction method using the same, which allows one end of a first pile and the top of a second pile to be accurately brought into contact without misalignment in order to perform welding work to connect the first and second piles to each other. Background Technology

[0002] Generally, when carrying out civil engineering or construction work on the ground, concrete piles are driven in to reinforce the ground, and foundation work is constructed on top of them.

[0003] Such concrete piles are widely used in the foundation work of buildings because they have a relatively low manufacturing cost and offer high resistance to vertical loads.

[0004] Also, the depth to which concrete piles must be driven varies depending on the ground conditions, and in the case of soft ground, two or more piles are driven in succession.

[0005] In other words, conventional concrete pile connection devices employ a method of installing steel plates at the ends of concrete piles and connecting them by welding.

[0006] This welding connection method joins steel plates to the ends of concrete piles in advance.

[0007] In other words, a plate must be installed at the bottom of the upper connecting concrete pile, plates must be installed at the top and bottom of the middle connecting concrete pile, and a plate must be connected at the top of the lower connecting concrete pile.

[0008] However, these many types of concrete piles required securing storage space at the pile manufacturing site, and there was a problem of increased costs due to unnecessary inventory of the plates.

[0009] In addition, this conventional welding-based pile connection device had a disadvantage in that when welding plates, concrete piles would move relative to each other, preventing them from maintaining accurate positions. If the piles became misaligned, the welding operation to connect them could not be carried out.

[0010] In addition, conventional connecting devices were large and heavy, making it difficult to transport and move products.

[0011] Therefore, in order to proceed with the welding work to connect the piles, there is a need for a device that accurately aligns the ends of the piles without any misalignment.

[0012] A prior art document related to the present invention is Korean Registered Patent Publication No. 10-1562984 (published on October 23, 2015), in which technology regarding "a rapid connection device with upper and lower parts separated for irregular piles and a pile construction method using the same" has been disclosed. The problem to be solved

[0013] In various embodiments of the present invention, a first connecting member having a plurality of first bolt fastening holes formed at the bottom of a first pile is disposed, and a second connecting member having a plurality of second bolt fastening holes formed at the top of a second pile is disposed, and in this state, the plurality of first and second bolt fastening holes are coupled with the heads of first and second bolts protruding from the first and second connecting members to perform a welding operation to connect the first and second piles, thereby preventing one end of the first pile and the top of the second pile from being misaligned with each other, and a pile construction method using the same is provided.

[0014] In various embodiments of the present invention, a first connecting member is separated or combined into first, second, and third connecting parts, and a second connecting member is separated or combined into fourth, fifth, and sixth connecting parts. Since the first and second connecting members can move while the first, second, third, fourth, fifth, and sixth connecting parts are separated, the invention provides a pile connecting device and a pile construction method using the same that facilitate the transport and movement of the first and second connecting members. means of solving the problem

[0015] According to various embodiments of the present invention, a pile connecting device comprising a first pile and a second pile having an upper end facing one end of the first pile, the device comprises: a first connecting member disposed on the lower end of the first pile and forming a plurality of first bolt fastening holes facing a plurality of first fastening nuts embedded in the lower surface of the first pile; and a second connecting member disposed on the upper end of the second pile and facing the first connecting member, and forming a plurality of second bolt fastening holes facing a plurality of second fastening nuts embedded in the upper surface of the second pile. and a plurality of first and second bolt coupling holes formed in the first and second connecting members and screw-fastened to the first and second fastening nuts and the first and second bolt fastening holes, and coupled to the heads of the first and second bolts protruding from the first and second bolt fastening holes; wherein the plurality of first and second bolt coupling holes are coupled to the heads of the first and second bolts when facing the first and second connecting members, thereby preventing one end of the first pile and the upper end of the second pile from being misaligned with each other, thereby facilitating the welding work of connecting the first and second piles.

[0016] According to various embodiments of the present invention, the welding space may further include a space formed obliquely on the outer circumference of the first and second connecting members, formed when facing the first and second connecting members, and joined by welding the first and second connecting members.

[0017] According to various embodiments of the present invention, the first connecting member includes the first, second, and third connecting portions, and the first, second, and third connecting portions are formed in a donut shape when combined with each other, and the first, second, and third connecting portions can be separated from each other to facilitate transport and movement.

[0018] According to various embodiments of the present invention, the second connecting member includes fourth, fifth, and sixth connecting portions, and the fourth, fifth, and sixth connecting portions are formed in a donut shape when combined with each other, and the fourth, fifth, and sixth connecting portions can be separated to facilitate transport and movement.

[0019] According to various embodiments of the present invention, a joining surface may be formed at both ends of the first, second, third, fourth, fifth, and sixth connecting portions to join the first, second, third, fourth, fifth, and sixth connecting portions in order to form the donut shape.

[0020] According to various embodiments of the present invention, a plurality of fixing fastening members are arranged around the outer surface of the first and second connecting members, facing an inclined surface formed on the outer surface of the first and second connecting members and fixing the first and second connecting members.

[0021] A pile connection device characterized by forming screw fastening holes in the plurality of fixed fastening members that correspond to screw holes formed in the first and second connecting members, and fastening bolts and nuts to the corresponded screw holes and screw fastening holes to fix the plurality of fixed fastening members to the first and second connecting members.

[0022] According to various embodiments of the present invention, a pile connection device is characterized in that the plurality of fixed fastening members have a detachment prevention surface formed thereon that faces an inclined surface formed on the outer circumference of the first and second connecting members and prevents the first and second connecting members from detaching from the plurality of fixed fastening members.

[0023] According to various embodiments of the present invention, a pile construction method using a pile connection device comprises: a step of placing a first connecting member on the lower cross-section of a first pile, the first connecting member having a plurality of first bolt fastening holes formed facing a plurality of first fastening nuts embedded in the lower surface of the first pile; a step of placing a second connecting member on the upper cross-section of a second pile, the second connecting member having a plurality of second bolt fastening holes formed facing a plurality of second fastening nuts embedded in the upper surface of the second pile; a step of screwing a first bolt into the plurality of first fastening nuts and the plurality of first bolt fastening holes while simultaneously protruding a first bolt head formed on the first bolt from the first bolt fastening holes; and a step of screwing a second bolt into the plurality of second fastening nuts and the plurality of second bolt fastening holes while simultaneously protruding a second bolt head formed on the second bolt from the second bolt fastening holes. And in this state, the lower surface of the first file and the upper surface of the second file are brought into contact, and the first and second connecting members are brought into contact, at which time the protruding first and second bolt heads are coupled to a plurality of first and second bolt coupling holes of the first and second connecting members; and the plurality of first and second bolt coupling holes are coupled to the first and second bolt heads when the first and second connecting members are brought into contact, thereby preventing one end of the first file and the upper end of the second file from being misaligned with each other, thereby facilitating the progress of a welding operation to connect the first and second files around the outer perimeter of the first and second connecting members. Effects of the invention

[0024] According to various embodiments of the present invention, a first connecting member having a plurality of first bolt fastening holes formed at the bottom of a first pile is disposed, and a second connecting member having a plurality of second bolt fastening holes formed at the top of a second pile is disposed. In this state, the plurality of first and second bolt fastening holes are coupled with the heads of first and second bolts protruding from the first and second connecting members when facing the first and second connecting members, thereby preventing the first end of the first pile and the top of the second pile from being misaligned with each other, which facilitates the progress of the welding work connecting the first and second piles. Accordingly, the progress of the welding work on the first and second piles can be improved.

[0025] In addition, the first connecting member is separated or combined into the first, second, and third connecting parts, and the second connecting member is separated or combined into the fourth, fifth, and sixth connecting parts; when the first, second, third, fourth, fifth, and sixth connecting parts are combined, they form a donut shape, and in this state, they can be easily combined with the first and second files.

[0026] When the first, second, third, fourth, fifth, and sixth connecting parts are separated, the first, second, third, fourth, fifth, and sixth connecting parts can be moved while separated, thus facilitating the transport and movement of the first and second connecting members. Therefore, the use of the first and second connecting members can be further improved.

[0027] In addition, by configuring a plurality of fixing fastening members that are positioned around the outer surface of the first and second connecting members and face the inclined surface formed around the outer surface of the first and second connecting members while simultaneously fixing the first and second connecting members, the plurality of fixing fastening members can easily connect the first and second connecting members and simultaneously make the connection work of connecting the first and second piles even easier. Accordingly, the connection work of the first and second piles can be further improved. Brief explanation of the drawing

[0028] FIG. 1 is an exploded perspective view showing the overall configuration of a file linking device according to various embodiments of the present invention. FIG. 2 is an exploded perspective view showing the state before coupling of the first and second connecting members among the configurations of a file connection device according to various embodiments of the present invention. FIG. 3 is a perspective view showing the state in which the first and second connecting members are coupled to the first and second files among the configurations of a file connection device according to various embodiments of the present invention. FIG. 4 is a side cross-sectional view showing the state in which the first and second connecting members are coupled to the first and second files among the configurations of a file connection device according to various embodiments of the present invention. FIG. 5 is a perspective view showing a state in which a file connection device according to various embodiments of the present invention is coupled to the first and second files. FIG. 6 is a side cross-sectional view showing a state in which a file connection device according to various embodiments of the present invention is coupled to the first and second files. FIG. 7 is a perspective view showing the state in which the heads of the first and second bolts are coupled to the first and second connecting members among the configurations of a file connection device according to various embodiments of the present invention. Fig. 8 is an enlarged perspective view of part A of Fig. 7. FIG. 9 is a side cross-sectional view showing the state in which the heads of the first and second bolts are coupled to the first and second connecting members among the configurations of a file connection device according to various embodiments of the present invention. FIG. 10 is a perspective view showing the configuration of a file linking device according to various other embodiments of the present invention. Figure 11 is a cross-sectional view of AA' of Figure 10. Specific details for implementing the invention

[0029] The present invention is capable of various modifications and may have various embodiments, and some embodiments are described in detail with reference to the drawings. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention.

[0030] Terms including ordinal numbers, such as 'first', 'second', etc., may be used to describe various components, but said components are not limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. The term 'and / or' includes a combination of a plurality of related described items or any of a plurality of related described items.

[0031] Additionally, relative terms described based on what is visible in the drawings, such as 'front,' 'rear,' 'top,' and 'bottom,' may be replaced with ordinal numbers such as 'first,' 'second,' etc. Regarding ordinal numbers such as 'first,' 'second,' etc., their order may be the order in which they are mentioned or arbitrarily determined, and may be changed arbitrarily as necessary.

[0032] The terms used in this invention are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this invention, terms such as "comprising" or "having" are intended to specify the existence of the features, numbers, processes, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, processes, actions, components, parts, or combinations thereof.

[0033] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which this invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this invention.

[0034] A pile connection device (100) according to various embodiments of the present invention and a pile construction method using the same comprises, when connecting the first and second connecting members (110, 120), forming a plurality of first and second bolt coupling holes (130, 140) that are coupled to the first and second bolt heads (161, 171) fastened to the first and second piles (11, 12) in the first and second connecting members (110, 120), and such plurality of first and second bolt coupling holes (130, 140) are coupled to the first and second bolt heads (161, 171) of the first and second piles (11, 12), thereby preventing the first and second piles (11, 12) from becoming misaligned for welding work and thereby facilitating the progress of welding work on the first and second piles. One or more of various devices It may be a combination. Hereinafter, various embodiments of the present invention will be described with reference to the attached drawings.

[0035] FIG. 1 is an exploded perspective view showing the overall configuration of a file connection device (100) according to various embodiments of the present invention; FIG. 2 is an exploded perspective view showing the state before coupling of the first and second connecting members (110, 120) among the configurations of the file connection device (100) according to various embodiments of the present invention; FIG. 3 is a perspective view showing the state in which the first and second connecting members (110, 120) are coupled to the first and second piles (11, 12) among the configurations of the file connection device (100) according to various embodiments of the present invention; FIG. 4 is a side cross-sectional view showing the state in which the first and second connecting members (110, 120) are coupled to the first and second piles (11, 12) among the configurations of the file connection device (100) according to various embodiments of the present invention; FIG. 5 is a state in which the file connection device (100) according to various embodiments of the present invention is coupled to the first and second piles (11, 12). FIG. 6 is a side cross-sectional view showing a state in which a pile connecting device (100) according to various embodiments of the present invention is coupled to first and second piles (11, 12); FIG. 7 is a perspective view showing a state in which the heads of first and second bolts (160, 170) are coupled to first and second connecting members (110, 120) among the configurations of a pile connecting device (100) according to various embodiments of the present invention; FIG. 8 is an enlarged perspective view of section A of FIG. 7; FIG. 9 is a side cross-sectional view showing a state in which the heads of first and second bolts (160, 170) are coupled to first and second connecting members (110, 120) among the configurations of a pile connecting device (100) according to various embodiments of the present invention; FIG. 10 is a perspective view showing the configuration of a pile connecting device according to another various embodiment of the present invention; FIG. 11 is a front cross-sectional view AA' of FIG. 10. am.

[0036] Referring to FIGS. 1 to 11, the pile connection device (100) may include first and second piles (11, 12), first and second connecting members (110, 120), a plurality of first and second bolt connection holes (130, 140), and a welding space (150). For example, the first and second piles (11, 12) may be made of concrete piles (11, 12), and the first and second piles (11, 12) made of concrete piles (11, 12) are configured to be driven into the ground to reinforce the ground and to construct foundation work on top of them when civil engineering or construction work is performed on the ground.

[0037] On one end surface of the first pile (11) described above, a plurality of first nut mounting grooves (not shown) may be formed to accommodate and embed a plurality of first fastening nuts (11a) that are fastened to a first bolt (160) described later. For example, a plurality of first fastening nuts (11a) may be accommodated and embedded in the plurality of first nut mounting grooves (not shown) of the first pile (11).

[0038] Additionally, a plurality of second nut mounting grooves (12b) may be formed on one end surface of the second pile (12) to accommodate and embed a plurality of second fastening nuts (12a) that are fastened to the second bolt (170) described later. For example, a plurality of second fastening nuts (12a) may be accommodated and embedded in a plurality of first nut mounting grooves (12b) of the second pile (12).

[0039] The first connecting member (110) may be disposed on the lower cross-section of the first pile (11). For example, the first connecting member (110) may form the plurality of first bolt fastening holes (110a) facing the plurality of first fastening nuts (11a) embedded in the lower surface of the first pile (11).

[0040] The second connecting member (120) may be positioned on the upper surface of the second pile (12) and may face the first connecting member (110). For example, the second connecting member (120) may form the plurality of second bolt fastening holes (120a) that face the plurality of second fastening nuts (12a) embedded in the lower surface of the second pile (12).

[0041] The plurality of first bolt coupling holes (130) may be formed in the first connecting member (110). For example, the plurality of first bolt coupling holes (130) may be screw-fastened to the first fastening nuts (11a) and the first bolt fastening holes (110a) and simultaneously coupled to the protruding first bolt head (161).

[0042] The plurality of second bolt coupling holes (140) may be formed in the second connecting member (120). For example, the plurality of second bolt coupling holes (140) may be screw-fastened to the second fastening nuts (12a) and the second bolt fastening holes (120a) and simultaneously coupled to the protruding second bolt head (171).

[0043] These plurality of first and second bolt connection holes (130, 140) can be combined with the first and second bolt heads (161, 171) when the first and second connecting members (110, 120) are facing each other to perform welding work to connect the first and second piles (11, 12) around the outer perimeter of the first and second connecting members (110, 120), thereby preventing the first end of the first pile (11) and the top end of the second pile (12) from being misaligned with each other.

[0044] That is, the shape of the first pile (11) and the shape of the second pile (12) can be aligned with each other without any misalignment. In this state, when welding is performed on the outer perimeter of the first and second piles, the welding of the first and second piles can be facilitated.

[0045] In this state, a welding space (150) may be formed at an angle on the outer circumference of the first and second connecting members (110, 120) to face the first and second connecting members (110, 120) and to join the first and second connecting members (110, 120) by welding (C1). The first and second connecting members (110, 120) can be connected by welding in the welding space (150) thus formed.

[0046] The first connecting member (110) may include first, second, and third connecting parts (111, 112, 113) that are formed in a donut shape when combined with each other or formed in a curve to facilitate transport and movement when separated.

[0047] For example, when the first, second, and third connecting parts (111, 112, 113) are combined with each other, they can be formed into a donut shape.

[0048] A joining surface (A1) for joining the first, second, and third connecting parts (111, 112, 113) to form the donut shape may be formed at both ends of the first, second, and third connecting parts (111, 112, 113).

[0049] The first, second, and third connecting parts (111, 112, 113) can be reduced in size and volume when separated from each other, thereby facilitating the transport and movement of the first connecting member (110).

[0050] The second connecting member (120) may include fourth, fifth, and sixth connecting parts (121, 122, 123) that are formed in a donut shape when combined with each other or are formed in a curve to facilitate transport and movement when separated.

[0051] For example, the 4th, 5th, and 6th connecting parts (121, 122, 123) can be formed into a donut shape when the 4th, 5th, and 6th connecting parts (121, 122, 123) are combined with each other.

[0052] The above-mentioned 4th, 5th, and 6th connecting parts (121, 122, 123) can be reduced in size and volume when separated from each other, thereby facilitating the transport and movement of the 2nd connecting member (120).

[0053] A joining surface (B1) for joining the 4th, 5th, and 6th connecting parts (121, 122, 123) to form the donut shape may be formed at both ends of the 4th, 5th, and 6th connecting parts (121, 122, 123).

[0054] The above-mentioned 4th, 5th, and 6th connecting parts (121, 122, 123) can be reduced in size and volume when separated from each other, thereby facilitating the transport and movement of the 2nd connecting member (120).

[0055] The pile construction method using the pile connection device (100) of the present invention described above is as follows.

[0056] First, a plurality of first nut mounting grooves (not shown) can be formed at the bottom of the first file (11) to accommodate and embed a plurality of first fastening nuts (11a). A plurality of first fastening nuts (11a) can be secured by mounting them in the plurality of first nut mounting grooves formed in this way.

[0057] In this state, a first connecting member (110) can be placed on the lower cross-section of the first file (11) and formed with a plurality of first bolt fastening holes (110a) facing a plurality of first fastening nuts (11a) embedded in the lower surface of the first file (11).

[0058] A plurality of second nut mounting grooves (12b) can be formed at the bottom of the second file (12) to accommodate a plurality of second fastening nuts (12a). A plurality of second fastening nuts (12a) can be secured by mounting them in the plurality of second nut mounting grooves (12b) formed in this way.

[0059] In this state, a second connecting member (120) can be placed on the upper cross-section of the second file (12) and formed with a plurality of second bolt fastening holes (120a) facing a plurality of second fastening nuts (12a) embedded on the upper surface of the second file (12).

[0060] In this state, the first bolt (160) can be screwed into the plurality of first fastening nuts (11a) and the plurality of first bolt fastening holes (110a). At this time, the first bolt head (161) formed on the first bolt (160) can protrude from the first bolt fastening holes (110a).

[0061] The second bolt (170) can be screwed into the plurality of second fastening nuts (12a) and the plurality of second bolt fastening holes (120a). At this time, the second bolt head (171) formed on the second bolt (170) can protrude from the second bolt fastening holes (120a).

[0062] In this state, the lower surface of the first file (11) and the upper surface of the second file (12) can be brought into contact with each other, and at the same time, they can be brought into contact with the first and second connecting members (110, 120).

[0063] At this time, the protruding first and second bolt heads (161, 171) can be coupled to the plurality of first and second bolt coupling holes (130, 140) of the first and second connecting members (110, 120).

[0064] At this time, when the first and second connecting members (110, 120) are facing each other, the first and second bolt coupling holes (130, 140) are coupled with the first and second bolt heads (161, 171) that protrude, thereby preventing the first end of the first pile (11) and the top end of the second pile (12) from being misaligned with each other. Accordingly, the welding work of the first and second piles (11, 12) can be facilitated, and the welding work can be improved as a result.

[0065] At this time, a welding space (150) may be formed at an angle around the outer circumference of the first and second connecting members (110, 120).

[0066] In this way, the first and second connecting members (110, 120) can be joined by welding (C1) in the welding space (150) while the first and second connecting members (110, 120) are accurately facing each other without misalignment.

[0067] At this time, the bottom of the first file (11) and the top of the second file (12) can also be connected and fixed to each other.

[0068] As shown in FIGS. 10 and 11, a plurality of fixing fastening members (210) may be arranged around the outer surface of the first and second connecting members (110, 120) to face the inclined surface (110-1, 120-1) formed on the outer surface of the first and second connecting members (110, 120) and to fix the first and second connecting members (110, 120).

[0069] For example, the first and second connecting members (110, 120) may face each other, and screw holes (110-2, 120-2) may be formed simultaneously. At this time, screw fastening holes (211) that correspond to the screw holes (110-2, 120-2) formed in the first and second connecting members (110, 120) may be formed in the plurality of fixed fastening members (210). That is, a bolt (220) and a nut (221) can be screwed into the corresponded screw holes (110-2, 120-2) and the screw fastening holes (211). At this time, the plurality of fixed fastening members (210) can fix the first and second connecting members (110, 120) to each other by screwing the bolt (220) and the nut (221).

[0070] In these plurality of fixed fastening members (210), a detachment prevention surface (212) may be formed that faces an inclined surface (110-1, 120-1) formed on the outer circumference of the first and second connecting members (110, 120) and simultaneously prevents the first and second connecting members (110, 120) from detaching from the plurality of fixed fastening members (210).

[0071] For example, when the plurality of fixed fastening members (210) are fixed to the outer circumference of the first and second connecting members (110, 120), the anti-detachment surface (212) formed on the plurality of fixed fastening members (210) faces the inclined surface (110-1, 120-1) formed on the outer circumference of the first and second connecting members (110, 120), and at the same time, the first and second connecting members (110, 120) can be prevented from detaching from the plurality of fixed fastening members (210).

[0072] The above anti-detachment surface (212) may be formed at an angle so as to face the inclined surface (110-1, 120-1) formed on the outer circumference of the first and second connecting members (110, 120).

[0073] In this way, by configuring a plurality of fixing fastening members (210) that are positioned around the outer surface of the first and second connecting members (110, 120) and face the inclined surface (110-1, 120-1) formed around the outer surface of the first and second connecting members (110, 120) while simultaneously fixing the first and second connecting members (110, 120), the plurality of fixing fastening members (210) can easily connect and simultaneously fix the first and second connecting members (110, 120). Accordingly, the connection operation of the first and second piles can be further improved.

[0074] The pile connection device of various embodiments of the present invention and the pile construction method using the same described above are not limited by the aforementioned embodiments and drawings, and it will be obvious to those skilled in the art to which the present invention belongs that various substitutions, displacements, and changes are possible within the technical scope of the present invention. Explanation of the symbols

[0075] 100 : File association device 110, 120: 1st and 2nd connecting members 130, 140: Multiple 1st and 2nd bolt connection holes 150 ; welding space 111, 112, 113: 1st, 2nd, and 3rd connections 121, 122, 123: 4th, 5th, and 6th connections 11, 12 : 1st and 2nd files A1, B1: Joining surface C1 : Welding

Claims

Claim 1 A pile connection device comprising a first pile and a second pile having an upper portion facing one end of the first pile, the device comprising: a first connecting member disposed on the lower end of the first pile and having a plurality of first bolt fastening holes formed to face a plurality of first fastening nuts embedded in the lower surface of the first pile; and a second connecting member disposed on the upper end of the second pile and facing the first connecting member, and having a plurality of second bolt fastening holes formed to face a plurality of second fastening nuts embedded in the upper surface of the second pile. A pile connection device comprising: a plurality of first and second bolt coupling holes formed in the first and second connecting members, which are screw-fastened to the first and second fastening nuts and the first and second bolt fastening holes and coupled to the heads of the first and second bolts protruding from the first and second bolt fastening holes; wherein the plurality of first and second bolt coupling holes are coupled to the heads of the first and second bolts when facing the first and second connecting members, thereby preventing the first end of the first pile and the upper end of the second pile from being misaligned with each other, and thus facilitating the progress of a welding operation to connect the first and second piles. Claim 2 A pile connection device according to claim 1, further comprising a welding space formed obliquely on the outer circumference of the first and second connecting members, formed when facing the first and second connecting members, and joined by welding the first and second connecting members. Claim 3 A file connection device according to claim 1, wherein the first connecting member includes the first, second, and third connecting portions, the first, second, and third connecting portions are formed in a donut shape when combined with each other, and the first, second, and third connecting portions are separated from each other to facilitate transport and movement. Claim 4 A file connection device according to claim 3, wherein the second connecting member includes fourth, fifth, and sixth connecting portions, the fourth, fifth, and sixth connecting portions are formed in a donut shape when combined with each other, and the fourth, fifth, and sixth connecting portions are separated to facilitate transport and movement. Claim 5 A file connection device according to claim 4, characterized in that a connecting surface is formed at both ends of the first, second, third, fourth, fifth, and sixth connecting parts to connect the first, second, third, fourth, fifth, and sixth connecting parts in order to form the donut shape. Claim 6 A pile connection device according to claim 1, wherein a plurality of fixing fastening members are arranged around the outer surface of the first and second connecting members and face an inclined surface formed on the outer surface of the first and second connecting members and fix the first and second connecting members, and the plurality of fixing fastening members have screw fastening holes formed in the screw holes formed in the first and second connecting members, and the plurality of fixing fastening members are fixed to the first and second connecting members by fastening bolts and nuts to the aligned screw holes and screw fastening holes. Claim 7 A pile connection device according to claim 6, characterized in that the plurality of fixed fastening members have a detachment prevention surface formed thereon that faces an inclined surface formed on the outer perimeter of the first and second connecting members and prevents the first and second connecting members from detaching from the plurality of fixed fastening members. Claim 8 A pile construction method using a pile connection device comprises: a step of placing a first connecting member on the lower cross-section of a first pile, the first connecting member having a plurality of first bolt fastening holes formed facing a plurality of first fastening nuts embedded in the lower surface of the first pile; a step of placing a second connecting member on the upper cross-section of a second pile, the second connecting member having a plurality of second bolt fastening holes formed facing a plurality of second fastening nuts embedded in the upper surface of the second pile; a step of screwing a first bolt into the plurality of first fastening nuts and the plurality of first bolt fastening holes while simultaneously protruding a first bolt head formed on the first bolt from the first bolt fastening holes; and a step of screwing a second bolt into the plurality of second fastening nuts and the plurality of second bolt fastening holes while simultaneously protruding a second bolt head formed on the second bolt from the second bolt fastening holes. A pile construction method using a pile connection device, comprising: a process in which, in this state, the lower surface of the first pile and the upper surface of the second pile are brought into contact, and the first and second connecting members are brought into contact, at which time the protruding first and second bolt heads are coupled to a plurality of first and second bolt coupling holes of the first and second connecting members; wherein the plurality of first and second bolt coupling holes are coupled to the first and second bolt heads when the first and second connecting members are brought into contact, thereby preventing the first end of the first pile and the upper end of the second pile from being misaligned with each other, and thereby facilitating the progress of welding work to connect the first and second piles around the outer perimeter of the first and second connecting members.

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