KR102581591B1 - Pipe connecting structure and phc pile structure using the same - Google Patents

Abstract

The present invention provides a pipe connection structure and a PHC pile structure using the same. The pipe connection structure according to the present invention includes a first connection member and a second connection member that can be connected to each other, the first connection member includes a joining pin whose one end is installed on one end of the first pipe, and the connection part of the joining pin A first engaging portion is provided on the outer peripheral surface in the circumferential direction, the second connecting member includes a joining pin connection assembly installed on one end of the second pipe facing one end of the first pipe, and the joining pin connection assembly is accommodated inside. A casing in which a space is formed and an insertion hole at one end into which a joining pin is inserted is formed; A holder positioned in the receiving space in the direction of the center line and having a fixing hole formed therein, which corresponds to the insertion hole in the direction of the center line, and is provided with a second engaging portion on the inner surface that can be fitted to the first engaging portion in the circumferential direction; A positioning unit, one end of which is disposed in contact with the end of the holder, capable of positioning and fixing the holder in the radial direction and the center line direction; and a holder fastener supported on one end of the inner surface of the receiving space facing the insertion hole in the center line direction, receiving at least a portion of the positioning portion in a through hole formed in the central portion, and attachable to the outer surface of the holder, and a pipe connection structure. has a first position in which the first connecting member and the second connecting member are not fastened, and a second position in which the first connecting member and the second connecting member are fastened, and in the first position, the positioning portion abuts the end of the holder. It is disposed to fix the position of the holder in the radial direction and the center line direction, and in the second position, the positioning portion is spaced from the end of the holder by a pushing force from the connection portion of the joining pin inserted into the fixing hole, and the position of the holder is released. The fastener is coupled to the outer surface of the holder and provides a pressing force so that the holder is reduced radially inward and fitted with the joining pin to tighten and secure the first engaging portion of the joining pin of the first connecting member and the second connecting member. By securing a firm connection between pipes through the fitting fastening method of the second locking part of the holder, it is possible to effectively prevent loosening of the connection and improve connection strength.

Description

Pipe connection structure and PHC file structure using the same {PIPE CONNECTING STRUCTURE AND PHC PILE STRUCTURE USING THE SAME}

The present invention relates to a pipe connection structure and a PHC pile structure using the same.

In general, pipe connection methods such as PHC piles (Pretensioned spun high strength concrete pile) applied to architecture and civil engineering are mainly divided into welding and non-welding methods. In the non-welding method, the opposite ends of the two pipes to be connected are connected. A pipe connection structure is installed between the pipes, and the pipes are connected to each other using connection methods such as screw connections and wedges. When using a conventional pile connection structure, the connection between piles may not be strong due to fastening tolerances or long-term use, which may affect the connection strength or risk loosening the connection, which may also adversely affect the tensile load. There is a problem.

The purpose of the present invention is to provide a pipe connection structure that can secure a solid connection between pipes to effectively prevent loosening of the connection and improve connection strength in order to solve the problems of the prior art.

In addition, the purpose of the present invention is to provide a PHC pile structure using a pipe connection structure that can secure a solid connection between piles, effectively prevent connection loosening, and improve connection strength.

However, the purpose of the present invention is not limited to this, and even if not explicitly mentioned, purposes and effects that can be understood from the means or embodiments of solving the problem described below are also included.

In order to achieve the above object, according to one embodiment of the present invention, there is a pipe connection structure including a first connection member and a second connection member that can be fastened to each other, wherein one end of the first connection member is one end of the first pipe. It includes a joining pin installed on the joint pin, and a first locking part is provided in the circumferential direction on the outer peripheral surface of the connection part of the joining pin, and the second connecting member is installed on one end of the second pipe facing the one end of the first pipe. A casing comprising a bonding pin connection assembly, the bonding pin connection assembly having a receiving space therein and an insertion hole at one end into which the bonding pin is inserted; a holder positioned in the receiving space in the direction of the center line and having a fixing hole formed therein, which corresponds to the insertion hole in the direction of the center line, and has a second locking portion on its inner surface that can be fitted to the first locking part in the circumferential direction; a positioning unit, one end of which is disposed in contact with an end of the holder and capable of fixing the holder in a radial direction and the center line direction; and a holder fastener supported on an inner surface of one end of the receiving space facing the insertion hole in the center line direction, receiving at least a portion of the positioning portion in a through hole formed in the central portion, and attachable to an outer surface of the holder. And, the pipe connection structure has a first position where the first connection member and the second connection member are not fastened and a second position where the first connection member and the second connection member are fastened, and at the first position, The positioning part is disposed in contact with an end of the holder to position and fix the holder in the radial direction and the center line direction, and in the second position, the positioning part is positioned in contact with the end of the holder. In the second position, the positioning part is positioned in contact with the end of the holder. The holder is separated from the end of the holder by a pushing force and the position of the holder is released, and the holder fastener is coupled to the outer surface of the holder and the holder is reduced inward in the radial direction to fit with the joining pin. Provides a pipe connection structure that provides pressing force to tighten and secure.

The positioning unit includes a positioning pin whose end is disposed in contact with an end of the holder and which positions the holder in a radial direction and in the center line direction; and a position fixing part disposed in the through hole of the holder fastener and capable of fixing the position of the position fixing pin, wherein in the first position, the position fixing pin is fixed in position by an end of the holder and the position fixing part. In the second position, the position fixing pin is released from the position of the end of the holder and the position fixing part by a pushing force from the connection part of the joining pin inserted into the fixing hole and moves from the fixing hole to the through hole. It may break away.

The holder fastener includes: a fixing ring provided with the through hole where the position fixing part is disposed, in contact with an inner wall surface of the casing, and movably disposed along an outer surface of the holder; and is mounted on a mounting portion formed on an outer surface of the fixing ring, and is compressively supported on one end of the inner surface of the receiving space and the mounting portion of the fixing ring in the center line direction, so that the fixing ring moves by elastic restoring force in the second position. It may include an elastic member that elastically supports the fixing ring to provide the pressing force while being coupled to the outer surface of the holder.

The holder is composed of a plurality of separate holder pieces joined by an elastic ring disposed on the outer surface of the plurality of holder pieces, and the outer surface of the holder is tapered so that the size gradually decreases in the insertion direction of the joining pin. It is configured to have a true shape, and the inner surface of the fixing ring is configured to have a shape that matches the shape of the outer surface, so that the elastic member moves the fixing ring along the outer surface of the holder in a direction opposite to the insertion direction. You can pressure them to do it.

The connection part of the joining pin includes an extension part extending from one end of the joining pin, and a first locking protrusion as the first locking part at a portion in contact with the extension part that protrudes in the radial direction. It includes a coupling part, and the fixing hole of the holder is a guide hole to which the extension part is coupled at the second position and the second locking part, which can be fitted to the first locking protrusion in the circumferential direction on the inner surface of the fixing hole. 2 It may include a coupling hole in which a locking protrusion is formed, and a protruding flange may be disposed at one end of the position fixing pin, which is inserted into the coupling hole and positions and fixes the holder in the radial direction.

The length of the connection portion of the joining pin may be greater than the length from the top surface of the casing in contact with the joining pin to the protruding flange.

The first locking protrusion and the second locking protrusion may have locking surfaces in contact with each other having an inclined surface.

The inner diameter of the fixing ring is configured to be larger than the outer diameter of the position fixing pin, and the inner surface of the fixing ring facing the holder and the outer surface of the holder are each composed of matching tapered inclined surfaces, and are positioned at the first position. They may be spaced apart from each other and may be coupled to each other at the second position.

The first connecting member further includes a first nut threadedly connected to the head of the joining pin, the joining pin is connected to the first pipe by the first nut, and the head of the joining pin is connected to the first pipe. 1 It is accommodated in a nut, and the connection part of the joining pin is disposed to be exposed to the outside of the first nut, and the second connecting member accommodates the joining pin connection assembly inside and has a second nut threadedly connected to the outer surface of the casing. Further comprising, the joining pin connection assembly may be connected to the second pipe by the second nut.

According to another embodiment of the present invention, there is a PHC pile structure using the pipe connection structure, including an upper PHC pile that is the first pipe and a lower PHC pile that is the second pipe, and the first connecting member is the upper PHC pile. A plurality of second connecting members are cast at the lower end of the pile to be spaced apart in the circumferential direction, and the second connecting member is cast in plural pieces to be spaced apart in the circumferential direction at the upper end of the lower PHC pile to correspond to the first connecting member. It further provides a PHC pile structure using a pipe connection structure in which the upper PHC pile and the lower PHC pile are connected through the second connecting member.

The pipe connection structure according to the present invention secures a firm connection between the pipes through a fitting fastening method between the first engaging portion of the joining pin of the first connecting member and the second engaging portion of the holder of the second connecting member, thereby effectively preventing loosening of the connection. It has the effect of preventing and improving connection strength.

In addition, the PHC pile structure using the pipe connection structure according to the present invention has a fastening tolerance through a fitting fastening method of the first engaging portion of the joining pin of the first connecting member and the second engaging portion of the holder of the second connecting member. The upper PHC pile and the lower PHC pile are firmly connected, effectively preventing loosening of the connection and improving the connection strength. In addition, after the joining pin of the first connecting member is fastened to the holder, the upper PHC pile and the lower PHC pile are connected. It has the effect of improving constructability by providing a close bonding condition that does not cause clearance between piles.

The various and beneficial advantages and effects of the present invention are not limited to the above-described content, and may be more easily understood through description of specific embodiments of the present invention.

1 is an exemplary cross-sectional view of a second connection member of a pipe connection structure according to an embodiment of the present invention.
Figure 2 is an exemplary cross-sectional view showing a process of assembling a first connection member and a second connection member of a pipe connection structure according to an embodiment of the present invention.
Figure 3 is an exemplary cross-sectional view at a second position where the first and second connection members of the pipe connection structure according to an embodiment of the present invention are assembled.
Figure 4 is an exploded view of the PHC file structure according to an embodiment of the present invention.
Figure 5 is an enlarged cross-sectional view of the "A" part and the "B" part of the PHC pile structure of Figure 4 being fastened.

Hereinafter, with reference to the attached drawings, preferred embodiments will be described in detail so that those skilled in the art can easily practice the present invention. However, when describing preferred embodiments of the present invention in detail, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. In addition, the same symbols are used throughout the drawings for parts that perform similar functions and actions. In addition, in this specification, terms such as 'top', 'top', 'upper surface', 'bottom', 'bottom', 'bottom', 'side', etc. are based on the drawings, and in reality, the components are arranged It may vary depending on the direction in which it takes place.

Additionally, throughout the specification, when a part is said to be 'connected' to another part, this is not only the case when it is 'directly connected', but also when it is 'indirectly connected' with another component in between. Also includes. In addition, 'including' a certain component means that other components may be further included rather than excluding other components, unless specifically stated to the contrary.

Figure 4 is an exploded view of the PHC file structure according to an embodiment of the present invention. As shown in Figure 4, the pipe connection structure according to the present invention is a structure that connects pipes applied to construction and civil engineering, such as PHC piles, PC piles, and metal pipes. For example, it can be used to connect PHC piles used in roads. You can.

For example, as shown in FIG. 4, the pipe connection structure is a connection structure for PHC piles and may include an upper PHC pile 100 and a lower PHC pile 200, and the upper PHC pile 100 and the lower PHC files 200 can be connected to each other using the pipe connection structure according to the present invention.

Specifically, a pipe connection structure according to an exemplary embodiment of the present invention will be described with reference to FIGS. 1 to 5.

The pipe connection structure according to the present invention includes a first connection member 1 including a joint pin 12 and a second connection member 2 including a joint pin connection assembly.

Figure 1 is an exemplary cross-sectional view of the second connection member 2 of the pipe connection structure according to an embodiment of the present invention, and Figure 2 is an exemplary cross-sectional view of the first connection member 1 of the pipe connection structure according to an embodiment of the present invention. It is an exemplary cross-sectional view showing the process of assembling the and the second connecting member (2), and Figure 3 shows the first connecting member (1) and the second connecting member (2) of the pipe connecting structure according to an embodiment of the present invention. Figure 4 is an exemplary cross-sectional view in the assembled second position, Figure 4 is an exploded view of the PHC pile structure according to an embodiment of the present invention, and Figure 5 is an "A" portion and a "B" portion of the PHC pile structure of Figure 4. This is an enlarged cross-sectional view of the fastened structure.

Referring to the drawings, the pipe connection structure according to an embodiment of the present invention includes a first connection member (1) and a second connection member (2) that can be connected to each other, and the first connection member (1) has one end It includes a joining pin 12 installed at one end of the first pipe, and a first engaging portion is provided in the circumferential direction on the outer peripheral surface of the connection part of the joining pin 12. The second connection member 2 includes a joining pin connection assembly installed on one end of the second pipe facing the one end of the first pipe. The bonding pin connection assembly includes a casing (22) with a receiving space (221) formed therein and an insertion hole (222) into which the bonding pin (12) is inserted at one end. A second lock is positioned and fixed in the receiving space 221 in the center line direction (C), corresponds to the insertion hole 222 in the center line direction (C), and can be fitted to the first lock in the circumferential direction on the inner surface. A holder (23) in which an additional fixing hole (232) is formed; A positioning pin 24, one end of which is disposed in contact with the end of the holder 23, and which positions and fixes the holder 23 in the radial direction and the center line direction; And one end of the receiving space 221 facing the insertion hole 222 in the center line direction C is supported on the inner surface 2211, and the other end of the positioning pin 24 is fixed in the through hole 253 formed in the center. It is provided with a possible position fixing part and includes a holder fastener 25 that can be coupled to the outer surface of the holder 23. Here, the pipe connection structure has a first position where the first connection member (1) and the second connection member (2) are not fastened, and a second position where the first connection member (1) and the second connection member (2) are fastened. It has a location. In the first position, the position fixing pin 24 is fixed in position by the end of the holder 23 and the position fixing portion. In the second position, the position fixing pin 24 is released from the position fixing part by a pushing force from the connection portion of the joining pin 12 inserted into the fixing hole 232, thereby tightening the holder from the fixing hole 232. It is separated from the through hole 253 of the sphere 25, and the holder fastener 25 is coupled to the outer surface of the holder 23, and the holder 23 is reduced radially inward to connect the joining pin 12 and the holder fastener 25. Pressing force is provided to ensure that it is fitted and tightened.

Here, when the pipe connection structure is applied to the PHC pile structure, one of the first pipe and the second pipe may be the upper PHC pile 100, and the other may be the lower PHC pile 200. For example, to facilitate assembly, the first pipe may be composed of an upper PHC pile 100, and the second pipe may be composed of a lower PHC pile 200, so that the first connecting member 1 is connected to the upper PHC pile. It is installed on the lower part 101 of (100), and the second connecting member 2 is installed on the upper part 201 of the lower PHC pile 200, and the first connection is made using the dead weight of the upper PHC pile 100. In the process of inserting the joining pin 12 of the member 1 through the insertion hole 222 of the second connecting member 2 into the fixing hole 232 of the holder 23, the end of the holder 23 and the holder By pushing the position fixing pin 24, which is fixed between the position fixing parts of the fastener 25, the position fixing part and the position fixing are released, and the fastener 25 moves away from the fixing hole 232 into the through hole 253 of the holder fastener 25. When the holder fastener 25 is coupled to the outer surface of the holder 23, the holder 23 is contracted radially inward by the pressing force of the holder fastener 25, thereby removing the joint pin 12. 1 By fitting and tightening the second locking portion of the holder 23, the upper PHC pile 100 and the lower PHC pile 200 are firmly connected without a fastening tolerance, effectively preventing loosening of the connection and maintaining the connection. Strength can be improved. In addition, after the joining pin 12 of the first connecting member 1 is fastened to the holder 23, a close coupling condition is maintained in which no gap occurs between the upper PHC pile 100 and the lower PHC pile 200. This can improve constructability.

Specifically, to further improve the connection strength and tensile load of the upper PHC pile 100 and the lower PHC pile 200, the first connecting member 1 is attached to the lower end 101 of the upper PHC pile 100. It is cast in plural pieces spaced apart in the direction, and the second connecting member 2 is cast in plural pieces spaced apart in the circumferential direction on the upper end 201 of the lower PHC pile 200 to correspond to the first connecting member 1, The upper PHC pile 100 and the lower PHC pile 200 may be connected through the first connecting member 1 and the second connecting member 2. However, when the pipe connection structure is applied to the PHC pile structure, the first pipe may be composed of the lower PHC pile 200, and the second pipe may be composed of the upper PHC pile 100.

Here, the insertion hole 222 of the casing 22 has an outer diameter of the connection part of the joining pin 12 so that the connecting part of the joining pin 12 (including the extension part 121 and the joining part 122 to be described later) can be easily inserted. It can have a larger hole diameter. In addition, one end (top in the drawing) of the insertion hole 222 of the casing 22 opposite the joining pin 12 may be formed to be round.

In one embodiment, the holder fastener 25 is provided with the through hole 253 and the position fixing part, comes into contact with the inner wall surface 225 of the casing 22, and moves along the outer surface of the holder 23. Possibly arranged fixing ring 251; And it is mounted on the mounting part formed on the outer surface of the fixing ring 251, and is compressed and supported on the inner surface 2211 at one end of the receiving space 221 and the mounting part of the fixing ring 251 in the center line direction C, and is held in the second position. It may include an elastic member that elastically supports the fixing ring 251 to provide the pressing force while the fixing ring 251 is moved by elastic restoring force and coupled to the outer surface of the holder 23. As an example, as shown in FIGS. 1 to 3, the elastic member may be a helical spring 252. The through hole 253 is formed in the central part of the fixing ring 251. The mounting portion of the fixing ring 251 may be formed in the form of a mounting groove that is recessed radially inward from the outer surface of the fixing ring 251. In this case, the helical spring 252 is inserted into the mounting groove and is attached to the groove wall of the mounting groove and one end of the inner surface 2211 of the receiving space facing the insertion hole 222 in the center line direction C of the receiving space 221 (in the drawing). When the position fixing pin 24 is separated from the fixing hole 232 of the holder 23 by being compressed and supported between the lower inner surfaces, the fixing ring 251 is connected to the joint pin 12 by the elastic restoring force of the helical spring 252. By moving in the direction opposite to the insertion direction, that is, upward, it can be coupled to the outer surface of the holder 23 and provide a pressing force to shrink the holder 23 inward in the radial direction. The mounting portion of the fixing ring 251 is not limited to the mounting groove shape as described above, and may be configured in various forms such as a position-limited protruding structure. Here, what should be explained is that the fixing ring 251 is movably disposed along the outer surface of the holder 23, meaning that the position fixing pin 24 is located at the end of the holder 23 and the position of the fixing ring 251. Two states: a state in which the position is fixed between the fixing parts and a state in which it is separated from the fixing hole 232 of the holder 23 to the through hole 253 of the fixing ring 251, or the fixing hole 232 of the holder 23 Only when the fixing ring 251 is separated from the through hole 253 of the fixing ring 251, the fixing ring 251 contacts the outer surface of the holder 23 and moves along the outer surface of the holder 23 due to the elastic restoring force of the elastic member. This means that the holder 23 is reduced inward in the radial direction, and the arrangement structure of the fixing ring 251 and the holder 23 in any one of the above two states falls within the scope of the present invention. Specifically, in one embodiment, the position fixing pin 24 is fixed in position between the end of the holder 23 and the position fixing part of the fixing ring 251 and is fixed from the fixing hole 232 of the holder 23. When placed in contact with the outer surface of the holder 23 in both states of being separated from the through hole 253 of the ring 251, the fixing ring 251 is connected to the inner wall of the casing 22 and the holder 23. ) may be configured to be in contact between the outer surfaces of the holder 23 and the inner surface of the fixing ring 251 overlapping. In another embodiment, when the fixing ring 251 is arranged to contact the outer surface of the holder 23 only when the position fixing pin 24 is separated from the fixing hole 232 to the through hole 253, the fixing ring 251 is disposed to contact the outer surface of the holder 23. (251) is a through hole ( By configuring it to have a gap with 253), the holder 23 and the fixing ring 251 prevent interference, making it easy to insert the joining pin 12 into the fixing hole 232 of the second connecting member 2. It can be implemented. In this case, the joining pin 12 is released from the position fixing part by pushing the position fixing pin 24, which is fixed between the end of the holder 23 and the position fixing part of the fixing ring 251, and the position fixing part is released from the fixing hole 232. ) to the through hole 253 of the holder fastener 25, the fixing ring 251 moves toward the holder due to the elastic restoring force of the elastic member and is coupled to the outer surface of the holder 23. At this time, the holder 23 is reduced radially inward by the pressing force of the fixing ring 251, so that the first engaging portion of the joining pin 12 and the second engaging portion of the holder 23 are fitted and tightened.

What should be noted is that, after the position fixing pin 24 is separated from the fixing hole 232 to the through hole 253 of the fixing ring 251, the fixing hole of the holder 23 is held by the elastic ring 234. The end of the holder 23 is inserted into the inner surface of the fixing ring 251 so that the diameter after the holder 232) is reduced is the same as or smaller than the diameter of the inner surface of the fixing ring 251, so that the fixing ring 251 is inserted into the holder. It must be designed to provide pressing force to the outer surface of (23).

Additionally, what should be explained is that after the position fixing pin 24 is separated from the fixing hole 232 to the through hole 253 of the fixing ring 251, the fixing ring 251 moves toward the holder 23. It is spaced apart from the inner surface 2211 at one end of the receiving space 221, and the position fixing pin 24 falls to the inner surface 2211 at one end of the receiving space 221 by its own weight. At this time, the position fixing pin 24 is partially It may be accommodated in the through-hole 253 and another part may be exposed to the accommodating space 221, or it may not be accommodated in the through-hole 253 and the entirety may be exposed to the accommodating space 221.

In one embodiment of the present invention, the inner surface of the fixing ring 251 and the outer surface of the holder 23 that are in contact with each other are each composed of matching tapered inclined surfaces so that they can contact each other in a surface-to-face contact method, or the fixing rings are in contact with each other. One of the inner surface of 251 and the outer surface of the holder 23 is composed of a tapered inclined surface, and the other is composed of a vertical surface and may be contacted in a line-to-surface contact method. Of course, the holder fastener 25 is not limited to the above configuration, and may have various configurations depending on the actual situation as long as it operates to reduce the holder 23 radially inward.

As an example, the position fixing part consists of a first position fixing jaw 254 protruding from the inner surface of the through hole 253 of the fixing ring 251, and the other end of the position fixing pin 24 (holder 23). On the edge surface of the position fixing pin 24 (lower end) oriented with, a second position fixing jaw 242, which is hooked and fixed to the first position fixing jaw 254 at the first position, is formed to protrude outward in the radial direction. You can.

Here, the form in which the position fixation of the first position fixing jaw 254 and the second position fixing jaw 242 is released may be implemented in various ways, and as a specific example, the first position fixing jaw 254 and the second position fixing jaw 242 are released. At least one of the jaws 242 may be configured to be broken by an external force (force by which the joining pin 12 pushes the positioning pin 24). As exemplarily shown in FIGS. 3 and 5 , the second position fixing jaw 242 of the position fixing pin 24 may be configured in a breakable form. However, the form in which the position fixation of the first position fixing jaw 254 and the second position fixing jaw 242 is released is not limited to this, and the first position fixing jaw 254 and the second position fixing jaw 242 are fixed in the first position. The jaw 242 can be configured in any shape as long as it is fixed in position and released from the second position. As another example, at least one of the first position fixing jaw 254 and the second position fixing jaw 242 may be configured in the form of an elastic pin or the like.

In addition, in order to smoothly release the position fixing of the first positioning jaw 254 and the second positioning jaw 242, the first positioning jaw 254 may be configured to gradually become thinner in the radial direction. You can. Likewise, the second position fixing jaw 242 may also be configured to gradually become thinner outward in the radial direction. The first position fixing jaw 254 and the second position fixing jaw 242 may also have surfaces in contact with each other having an inclined surface.

In the first position where the joining pin 12 of the first connecting member 1 is not inserted and no external force is applied to the position fixing pin 24, the position fixing pin 24 is connected to the end of the holder 23 and the fixing ring. It is located between the first position fixing jaws 254 of (251), and the second position fixing jaw 242 is caught by the first position fixing jaw 254 and fixed in position. At the first position where the joining pin 12 of the first connecting member 1 is inserted into the fixing hole 232 of the holder 23 and an external force is applied to the position fixing pin 24, the position fixing pin 24 is Due to an external force, the second position fixing jaw 242 is separated from the first position fixing jaw 254 and moves downward in the through hole 253. At this time, the fixing ring 251 is released so that the positions of the first position fixing jaw 254 and the second position fixing jaw 242 are released (for example, the first position fixing jaw 254 and the second position fixing jaw 242 ), at least one of which is broken by an external force and the position fixation of the two is released) moves toward the holder 23 by the elastic restoring force of the elastic member and is coupled to the outer surface of the holder 23 to provide pressing force. . However, the position fixing form of the position fixing pin 24 and the fixing ring 251 according to the present invention is not limited to this, and may be configured in various forms capable of implementing position fixation. The fixing ring 251 and the position fixing pin 24 may be positioned at a distance from each other by the first position fixing jaw 254 and the second position fixing jaw 242 in the first position.

According to one embodiment of the present invention, the inner diameter of the fixing ring 251 may be larger than the outer diameter of the position fixing pin 24, and the inner surface of the fixing ring 251 facing the holder 23 and the holder The outer surfaces of (23) may each be composed of matching tapered inclined surfaces. Therefore, the fixing ring 251 and the position fixing pin 24 can be positioned at a distance from each other by the first position fixing jaw 254 and the second position fixing jaw 242 at the first position, and Even in the process of displacement from the first position to the second position, they can be implemented to effectively prevent movement interference by being spaced apart from each other. In the present invention, the position fixing pin 24 is a PHC pile without the need for separate driving construction. It can also serve as a space expansion so that it can be easily inserted into the fixing hole 232 of the holder 23 even with its own weight. Here, the size of the connection portion of the position fixing pin 24 and the bonding pin 12 is not limited, and the bonding pin 12 can be easily inserted and bonded when the position fixing pin 24 is separated from the fixing hole 232. It can be configured to a size that allows quick fastening of the pin 12 and the holder 23.

Meanwhile, in one embodiment, the holder 23 is configured by combining a plurality of holder pieces 233 that are separated from each other by an elastic ring 234 disposed on the outer surface of the plurality of holder pieces 233, and the holder The outer surface of (23) is tapered so that the size gradually decreases in the insertion direction of the joining pin 12, and the inner surface of the fixing ring 251 is configured to have a shape that matches the shape of the outer surface, The elastic member may press the fixing ring 251 to move in a direction opposite to the insertion direction along the outer surface of the holder 23. That is, the plurality of holder pieces 233 may have a wedge shape and may be maintained in a certain shape by the elastic ring 234. Here, a ring groove is formed in a portion corresponding to the circumferential direction of each holder piece 233 and the elastic ring 234 is mounted in the ring groove, so that the elastic ring 234 does not protrude out of the outer surface of the holder 233 as a whole. It is arranged so that movement interference with the fixing ring 251 can be prevented. In this way, the outer surface of the holder 23 and the inner surface of the fixing ring 251 are matched to each other in a tapered shape, so that the fixing ring 251 is pressed against the outer surface of the holder 23 by the elastic restoring force of the elastic member. It can be supported and pressed in a surface contact method, allowing the shrinking motion of the holder 23 in the radial direction to be performed quickly and smoothly. Here, the holder pieces 233 may be composed of three pieces spaced apart from each other at equal intervals, but may also be composed of two or four or more pieces. Additionally, the holder 23 may be formed as a single piece, for example, may be an elastically deformable member made of a composite material of a metal material and an elastic material and capable of shrinking inward in the radial direction. Specifically, it may be a structure in which a plurality of holder pieces arranged to be spaced apart in the circumferential direction are connected with an elastic material to be integrally coupled. Of course, the holder 23 is not limited to the above configuration, and may have various structures as long as it can be reduced and deformed in the radial direction.

In an exemplary embodiment, the connection portion of the joining pin 12 may include an extension portion 121 and a coupling portion 122. Specifically, the extension part 121 extends from one end of the joining pin 12, and the coupling part 122 extends from the extension part 121 and serves as the first locking part at the area in contact with the extension part 121. A first locking protrusion 1221 may be formed to protrude in the radial direction. The fixing hole 232 of the holder 23 is a guide hole 2321 to which the extension part 121 is coupled at the second position and the second locking part, and the first fixing hole 232 is formed on the inner surface of the fixing hole 232 in the circumferential direction. It may include a coupling hole 2322 in which a second locking protrusion 231 that can be fitted into the locking protrusion 1221 is formed. A protruding flange 241 may be formed at one end of the position fixing pin 24, which is inserted into the coupling hole 2322 to position and fix the holder 23 in the radial direction. Therefore, the protruding flange 241 is inserted into the fixing hole 232 of the holder 23 at the first position, and one end of the holder 241 is supported by hanging on the circumferential side of the protruding flange 241 in the radial and center line directions ( C) can be fixed in position. In the process of inserting the folding pop pin (12) into the fixing hole (232) of the holder (23), when the position fixing pin (24) and the fixing ring (251) are released by the pushing force, the position fixing pin (24) is released. It is moved in the insertion direction (i.e. downward), and the fixing ring 251 is moved in the direction opposite to the insertion direction, i.e. toward the holder 23, by the elastic restoring force of the elastic member, thereby providing a pressing force to the outer surface of the holder 23 to secure the holder. (23) is reduced radially inward. Accordingly, the first locking protrusion 1221 formed on the coupling portion 122 of the joining pin 12 is fitted with the second locking protrusion 231 formed in the fixing hole 232 of the holder 23 to ensure a firm tightening. It can be implemented. Here, in particular, the first locking protrusion 1221 of the bonding pin 12 and the second locking protrusion 231 of the holder 23 can be fitted into the correct position at once, so that the force applied to the bonding pin 12 is reduced. In-position fastening can be implemented regardless of the direction of force applied to the joining pin 12 without problems such as twisted fastening depending on the direction.

In one embodiment of the present invention, the length of the connection portion of the joining pin 12 is from the upper surface of the casing 22 in contact with the joining pin 12 to the protruding flange 241 of the positioning pin 24. It can be configured to be larger than the length. In other words, the length of the connection portion including the extension portion 121 and the coupling portion 122 of the joint pin 12 is the length of the position fixing pin 24 on the upper surface of the casing 22 in contact with the joint pin 12. It may be configured to be larger than the length up to the protruding flange 241. Here, the upper surface of the casing 22 in contact with the joining pin 12 may be one end of the casing 22 where the insertion hole is formed, or the head of the joining pin 12 may be at one end of the casing 22 ( When a seating groove in which 123) is partially seated is formed, the upper surface of the casing 22 in contact with the joining pin 12 may be the bottom surface of the seating groove. According to this configuration, the position fixing pin 24 can be separated from the fixing hole 232 by contacting and pressing the protruding flange 241 during the process of inserting the connection portion of the joining pin 12 into the fixing hole 232. .

Here, in order to easily and accurately tighten and fix the joint pin 12 and the holder 23, the first locking protrusion 1221 and the second locking protrusion 231 have locking surfaces in contact with each other of the bonding pin 12. It may be made of an inclined plane to guide insertion.

Additionally, the fixing hole 232 of the holder 23 may be configured so that the hole diameter of the guide hole 2321 is smaller than the outer diameter of the coupling portion 122 at the first position. This is because in the process of inserting the coupling portion 122 of the joining pin 12 into the guide hole 2321, the position is automatically adjusted in the center line direction (C) by the guide hole 2321 of the holder 23, thereby forming the fixing hole 232. It can serve as a guide to ensure accurate alignment. In addition, in the process of inserting the coupling portion 122 of the joining pin 12 until it comes into contact with the protruding flange 241 of the positioning pin 24 through the guide hole 2321, the holder 23 is expanded to protrude. It can also function to release the position fixing pin 24 in the radial direction while maintaining it radially spaced outward from the flange 241.

In one specific embodiment, to facilitate insertion of the joining pin 12, the fixing hole 232 is an expansion hole 2323 formed roundly at the insertion end of the guide hole 2321 into which the joining pin 12 is inserted. It may further include, and the insertion end of the coupling portion 122 of the joining pin 12 may be formed in a conical shape. Therefore, the joining pin 12, which has a cone-shaped insertion end, is position corrected in the process of being inserted into the guide hole 2321 of the holder 23 and can be centered based on the center line direction (C), so that the joining pin 12 is provided with a conical insertion end. The fastening position of (12) and the fixing hole 232 is automatically determined, so the connection work can be performed easily, quickly, and conveniently. It goes without saying that the form of the joining pin and holder according to the present invention is not limited to the above configuration, but can be formed in various forms.

Additionally, the casing 22 may be configured in a separate structure to facilitate assembly. Specifically, the casing 22 includes a main body 223 whose one end is a stepped portion 2231 with the insertion hole 222 formed thereon, and whose other end is open; and a cap 224 coupled to the other end of the main body 223 in a sealing manner. Here, the main body 223 and the cap 224 may form the receiving space 221 together and may be connected to each other by thread connection or the like. The circumference of the insertion hole 222 of the stepped portion 2231 of the main body 223 may be rounded. According to this configuration, the second connecting member 2 sufficiently utilizes the accommodation space 221 of the casing 22 to compactly arrange the holder 23, the position fixing pin 24, and the holder fastener 25. , the pipe connection structure is made to have an overall miniaturized structure.

In addition, the first connecting member 1 further includes a first nut 11 threadedly connected to the head 123 of the joining pin 12, and the joining pin 12 is connected to the first nut 11. ) is connected to the first pipe, the head portion 123 of the joining pin is accommodated in the first nut 11, and the connection part of the joining pin 12 may be arranged to be exposed to the outside of the first nut 11. there is. Here, the head portion 123 of the joining pin 12 may be formed with a protruding protrusion 1231 that protrudes outward in the radial direction at a portion connected to the connecting portion. In the process of inserting the head 123 of the joining pin 12 into the first nut 11 by thread connection, the protruding jaw 1231 of the head 123 is caught on the cross section of the first nut 11. By positioning the head 123 and the first nut 11 in the correct position, the connection precision of the connection portion of the joining pin 12 and the holder 23 of the joining pin connection assembly can be improved. The second connecting member 2 further includes a second nut 21 that accommodates the joining pin connection assembly therein and is threadedly connected to the outer surface of the casing 22, and the joining pin connection assembly is connected to the second nut ( 21) can be connected to the second pipe. Specifically, the outer peripheral surface of the main body 223 may be threadedly connected to the second nut 21, and the head 123 of the joining pin 12 may be threadedly connected to the first nut 11. Here, a locking protrusion 211 is formed on the inner peripheral surface of the second nut 21 in the circumferential direction so that the cap 224 can be caught, thereby defining the exact fixing position of the casing 22. The first nut 11 of the first connecting member 1 and the second nut 21 of the second connecting member 2 may be composed of embedded nuts installed at the end of a pipe such as a PHC pile, so that they can be used at the work place. After connecting the joining pin 12 of the first connecting member 1 and the joining pin connection assembly of the second connecting member 2 to the first nut 11 and the second nut 21, respectively, the joining pin 12 ) can be inserted into the joint pin connection assembly to create a solid connection between pipes.

Below, the connection process of the PHC file structure using the pipe connection structure according to an exemplary embodiment of the present invention will be described with reference to FIGS. 1 to 5.

What should be explained above is that the first nut 11 of the first connecting member 1 is installed in advance to be embedded in the lower end 101 of the upper PHC pile 100, and the second nut of the second connecting member 2 ( 21) is pre-embedded and installed in the upper part 201 of the lower PHC pile 200, so that during connection work, the joining pin 12 of the first connecting member 1 and the second connecting member 2 are joined at the work location. Connect the pin connection assembly to the first nut 11 embedded in the lower part 101 of the upper PHC pile 100 and the second nut 21 embedded in the upper part 201 of the lower PHC pile 200, respectively. , proceed with the connection work between the joint pin 12 and the joint pin connection assembly. Here, the first nut 11 and the second nut 21 will be explained by taking an example of a nut. In particular, the first nut 11 is composed of a PC nut, and the upper PHC pile 100 can use an upper PHC pile of an existing structure in which a PC nut is cast at the lower part 101. As shown in Figure 4, the first connecting member 1 and the second connecting member 2 are connected to the lower end 101 of the upper PHC pile 100 and the upper end 201 of the lower PHC pile 200 in the same number. They can be arranged, and in the drawing, each is shown as 9, but this is just an example and can be determined according to the diameter and needs of the pipe structure such as the actual PHC pile.

First, as shown in FIGS. 4 and 5, the joining pin 12 of the first connecting member 1 is connected to the first nut 11 embedded in the lower end 101 of the upper PHC pile 100 at the work location. and connect the casing 22 of the joint pin connection assembly of the second connecting member 2 to the second nut 21 embedded in the upper end 201 of the lower PHC pile 200. Here, in the process of inserting the head 123 of the joining pin 12 into the first nut 11 of the upper PHC pile 100 by thread connection, the protruding protrusion 1231 of the head 123 is 1 The head portion 123 and the first nut 11 can be fixed in place by being caught on the end surface of the nut 11. In addition, in the process of inserting the casing 22 of the joint pin connection assembly of the second connection member 2 into the second nut 21 of the lower PHC pile 200 by thread connection, the second nut 21 Since it is caught on the locking protrusion 211, the exact fixing position of the casing 22 can be defined.

Next, as shown in Figures 2 and 4, the joining pin 12 connected to the lower end 101 of the upper PHC pile 100 is connected to the upper end 201 of the lower PHC pile 200. It is inserted into the fixing hole 232 of the holder 23 through the insertion hole 222. At this time, when the connection part of the joining pin 12 is inserted into the guide hole 2321 of the position fixing pin 24, it is centered based on the center line direction (C) and is corrected to the correct fastening position to fix the position fixing pin 24. is removed from the fixing hole 232 into the through hole 253 of the holder fastener 25 by pushing in the insertion direction. When the position fixing pin 24 is released from the fixing hole 232 into the through hole 253 of the fixing ring 351 of the holder fastener 25, it is fixed by the elastic restoring force of the elastic member of the holder fastener 25. The ring 251 is moved to the second position by moving in a direction opposite to the insertion direction of the joining pin 12. At this time, as shown in FIGS. 3 and 5, the inner surface of the fixing ring 251 is coupled to the outer surface of the holder 23, and the holder 23 moves radially inward due to the pressing force of the fixing ring 251. It is reduced to fit and tighten the first engaging portion of the joining pin 12 and the second engaging portion of the holder 23, so that the upper PHC pile 100 and the lower PHC pile 200 are firmly formed without a fastening tolerance. It is connected, and can effectively prevent disconnection and improve connection strength.

The pipe connection structure including the configuration described above and the PHC pile structure using the same according to the present invention are configured by inserting the first engaging portion of the joining pin of the first connecting member and the second engaging portion of the holder of the second connecting member. The customized fastening method ensures a solid connection between pipes, effectively preventing loosening of the connection and improving connection strength.

In addition, the PHC pile structure using the pipe connection structure according to the present invention has a close coupling condition in which no gap occurs between the upper PHC pile and the lower PHC pile after the joining pin of the first connecting member is fastened to the holder. Constructability can be improved.

Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will recognize that the present invention can be implemented in other specific forms without changing its technical idea or essential features. You will understand. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive.

1: first connecting member 11: first nut
12: joining pin 121: extension part
122: Coupling portion 1221: First locking jaw
123: head 1231: protruding chin
2: second connecting member 21: second nut
211: Locking jaw 22: Casing
221: Accommodating space 2211: Once inside
2212: Inner surface of other end 222: Insertion hole
223: Main body 2231: Stepped part
224: cap 225: inner wall
23: Holder 231: Second locking jaw
232: fixing hole 2321: guide hole
2322: coupling hole 2323: expansion hole
233: Holder piece 234: Elastic ring
24: position fixing pin 241: protruding flange
242: Second position fixing jaw 25: Holder fastener
251: retaining ring 252: spiral spring
253: Through hole 254: First position fixing jaw
100: upper PHC pile 101: lower part
200: lower PHC file 201: upper part

Claims (10)

A pipe connection structure including a first connection member and a second connection member that can be connected to each other,
The first connecting member includes a joining pin whose one end is installed on one end of the first pipe, and a first engaging part is provided in the circumferential direction on the outer peripheral surface of the connecting part of the joining pin,
The second connection member includes a joining pin connection assembly installed on one end of the second pipe facing the one end of the first pipe,
The joining pin connection assembly includes a casing having a receiving space therein and an insertion hole at one end into which the joining pin is inserted; a holder positioned in the receiving space in the direction of the center line and having a fixing hole formed therein, which corresponds to the insertion hole in the direction of the center line, and has a second locking portion on its inner surface that can be fitted to the first locking part in the circumferential direction; a positioning unit, one end of which is disposed in contact with an end of the holder and capable of fixing the holder in a radial direction and the center line direction; and a holder fastener supported on an inner surface of one end of the receiving space facing the insertion hole in the center line direction, receiving at least a portion of the positioning portion in a through hole formed in the center, and attachable to an outer surface of the holder. do,
The pipe connection structure has a first position where the first connection member and the second connection member are not fastened and a second position where the first connection member and the second connection member are fastened,
In the first position, the positioning portion is disposed in contact with an end of the holder to position the holder in the radial direction and the center line direction,
In the second position, the positioning portion is spaced from an end of the holder and the position is released from the holder by a pushing force from a connection portion of the joining pin inserted into the fixing hole, and the holder fastener is located on an outer surface of the holder. A pipe connection structure that provides a pressing force so that the holder is contracted inward in the radial direction and fitted with the joining pin to tighten and secure the holder in a coupled state. The pipe connection structure according to claim 1, wherein the positioning portion has one end disposed in contact with an end of the holder and includes a positioning pin that positions the holder in the radial direction and the center line direction. The apparatus of claim 2, wherein the holder fastener includes: a fixing ring provided with the through hole, in contact with an inner wall surface of the casing, and movably disposed along an outer surface of the holder; and is mounted on a mounting portion formed on an outer surface of the fixing ring, and is compressively supported on one end of the inner surface of the receiving space and the mounting portion of the fixing ring in the center line direction, so that the fixing ring moves by elastic restoring force in the second position. An elastic member elastically supporting the fixing ring to provide the pressing force while coupled to the outer surface of the holder. The method of claim 3, wherein the holder is composed of a plurality of separate holder pieces joined by an elastic ring disposed on the outer surface of the plurality of holder pieces, and the outer surface of the holder is aligned in the insertion direction of the joining pin. It is configured in a tapered shape so that the size gradually decreases, and the inner surface of the fixing ring is configured in a shape that matches the shape of the outer surface, so that the elastic member moves the fixing ring along the outer surface of the holder in the insertion direction. A pipe connection structure that is pressurized to move in the opposite direction. The method of claim 4, wherein the connection part of the joining pin includes an extension part extending from one end of the joining pin and a first stopping protrusion as the first stopping part at a portion in contact with the extension part. It includes a coupling portion that protrudes in the radial direction,
The fixing hole of the holder is a guide hole to which the extension part is coupled at the second position and the second locking portion, and a second locking protrusion that can be fitted to the first locking protrusion in the circumferential direction is formed on the inner surface of the fixing hole. Contains a coupling hole,
A pipe connection structure in which a protruding flange is disposed at one end of the positioning pin and is inserted into the coupling hole to position and fix the holder in the radial direction. The pipe connection structure according to claim 5, wherein the length of the connecting portion of the joining pin is configured to be greater than the length from the upper surface of the casing in contact with the joining pin to the protruding flange. The pipe connection structure according to claim 5, wherein the first and second locking protrusions have engaging surfaces that contact each other with an inclined surface. The method of claim 3, wherein the inner diameter of the fixing ring is larger than the outer diameter of the position fixing pin, and the inner surface of the fixing ring facing the holder and the outer surface of the holder are each composed of matching tapered inclined surfaces. , The pipe connection structure is spaced apart from each other in the first position and coupled to each other in the second position. The method of claim 1, wherein the first connecting member further includes a first nut threadedly connected to the head of the joining pin, the joining pin is connected to the first pipe by the first nut, and the joining pin is connected to the first pipe. The head of the pin is accommodated within the first nut, and the connecting portion of the joining pin is disposed to be exposed to the outside of the first nut,
The second connection member accommodates the joining pin connection assembly therein and further includes a second nut threadedly connected to the outer surface of the casing, and the joining pin connection assembly is connected to the second pipe by the second nut. pipe connection structure. A PHC pile structure using the pipe connection structure according to any one of claims 1 to 9, comprising an upper PHC pile, which is the first pipe, and a lower PHC pile, which is the second pipe, and the first connecting member is the upper PHC pile. A plurality of second connecting members are cast at the lower end of the PHC pile to be spaced apart in the circumferential direction, and the second connecting member is cast in plural pieces to be spaced apart in the circumferential direction at the upper end of the lower PHC pile so as to correspond to the first connecting member. A PHC pile structure using a pipe connection structure in which the upper PHC pile and the lower PHC pile are connected through the member and the second connecting member.

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