KR102121804B1 - Weldless PHC file connection structure with improved ease of installation - Google Patents

Abstract

The present invention is composed of a ring portion forming a polygonal cross-section and a protruding border protruding downward from the outer side of the ring portion to form a receiving space between the outer side of the protruding border and the lower surface of the upper PHC pile. 1 connector; A second connector connected to an upper surface of the lower PHC pile and forming a polygonal cross section to contact the ring portion and the protruding border; And a transverse coupling bolt inserted and fastened to the protruding border of the first connector and the second connector in the receiving space.

Description

Weldless PHC file connection structure with improved ease of installation}

The present invention enables connection construction between PHC files by welding without ease through the ease of bolting, and also improves safety during operation such as lifting, and improves ease of installation by preventing the connection part from being exposed outside the PHC file. It is about the connection structure of PHC files that can be made.

In general, when constructing construction and civil engineering structures on soft grounds, files are used so as to secure the stability of the structure by transferring the load of the structure to the support layer.

The supporting layer for the construction of the pile mainly exists at a depth of several tens of meters from the ground surface, and in the case of the pile, it is manufactured to a certain length for the convenience of production and transportation, so that multiple piles are interconnected to extend the pile from the ground surface to the supporting layer Work is essential.

On the other hand, PHC piles (Pretensioned spun High strength Concrete Pile) are manufactured by introducing prestress to hollow concrete piles manufactured using centrifugal force, and these PHC piles have excellent resistance to deflection, anti-perforation method, etc. Construction is possible by using, so it is widely used when constructing structures on soft ground.

Conventionally, for the connection between the PHC piles, metal caps are installed at the top and bottom of the piles that face each other to protect the piles. This was done.

However, the connection between the PHC piles by welding as described above varies in quality depending on various reasons such as the actual site conditions where the work is actually performed, and the skill level of the worker. There are problems such as a decrease in life.

Accordingly, as a joint technology between PHC files by no welding, in the Republic of Korea Patent Registration No. 10-1577727, it is a plate made of a ring, and one side is coupled to the shoe of the upper and lower PHC piles, and vertically installed and fastened holes on the other side. Upper and lower joint plates in which a plurality of vertical plates are formed in a radial direction, a plurality of fastening bolts that are fastened through the fastening holes of the vertical plates when the vertical plates of the upper and lower joint plates are coupled to each other, the The vertical plates of the upper and lower joint plates are inserted between the upper and lower joint plates when they are joined to each other so as to surround the entire vertical plate when the upper and lower joint plates are joined and one or more wedge members that adjust the verticality. It is configured to include a ring-shaped bending plate formed, the wedge member is formed of a rectangular parallelepiped, one surface is inclined with respect to the opposite side is presented to the PH file pile fitting device.

However, in the case of the above technique, the upper and lower joint plates are fastened to the PHC pile, and the upper and lower PHC piles are placed, and then the vertical plates are fastened by mutual bolting to connect the PHC piles. Since the bolting operation must be performed in a narrow space during the bolting operation of the liver, the impact cannot be used, and thus the air is lengthened and the joint operation is not easy as the bolting operation is performed manually.

On the other hand, in the existing PHC pile, a PC nut is embedded in one end and a nut fixed to the tensioning shoe is formed at the other end. The nut fixed to the tensioning shoe has few threads, so it is necessary to tighten the bolt to lift the file. There was a problem that was not easy and exposed to safety accidents, and there was a problem that it was not easy to implement a connection structure between PHC files without welding using the existing PHC files.

Republic of Korea Patent Registration No. 10-1577727

The present invention has been devised to solve the above problems, and allows joint operations between PHC files by welding, but is constructed with ease of bolting on PHC files that can guarantee the ease of lifting and safety. It is intended to provide a PHC pile connection structure in which the ease is promoted and in addition, the ease of entry work is secured in the casing.

As a means for solving the above-described problems, a connection structure of a welding-less PHC file (hereinafter referred to as "connection structure of the present invention"), which improves the ease of construction of the present invention, is coupled to the lower surface of the upper PHC file and forms a polygonal cross-section. And a first connector configured to have a protruding border protruding downward from the outside of the ring portion to form an accommodation space between the protruding border outer side and the lower surface of the upper PHC pile; A second connector connected to an upper surface of the lower PHC pile and forming a polygonal cross section to contact the ring portion and the protruding border; It characterized in that it comprises; a transverse coupling bolt is inserted and fastened to the protruding border of the first connector in the receiving space and the second connector.

As an example, a recessed groove is formed on the upper surface of the second connector so that the head of the first bolt that couples the first connector to the lower surface of the PHC file and the head of the second bolt that couples the second connector to the upper surface of the PHC file are accommodated. It is characterized by being formed.

As an example, a buried nut having a thread formed on an inner periphery is disposed at both ends of the PHC pile, and the first bolt and the second bolt are fastened to the buried nut.

As an example, the PHC pile is characterized in that a strand is embedded in the PHC pile so that the head of the strand is settled at the buried nut at both ends.

As an example, the protruding border and the second connector are perforated so that the transverse coupling holes face each other so that the transverse coupling bolts are fastened, and the transverse coupling holes formed in the second connector are alternately formed with the receiving groove. It is characterized by.

As an example, the receiving groove is characterized in that a buffer pad is formed on the inner periphery and the head of the first bolt and the head of the second bolt are accommodated inside the buffer pad.

As an example, a bolt hole is formed at the second connector so that the first bolt is inserted and the second bolt is inserted, but the bolt hole is provided with a hollow buffer tube as an elastic material, and the first bolt and the second bolt are respectively provided. Is characterized in that it is fastened while passing through the hollow of the buffer tube.

As described above, the connection structure of the present invention enables connection construction between PHC files without welding through bolting, and also facilitates and safety during work such as lifting, and in particular, the connection part is not exposed outside the PHC file. By avoiding this, there is an advantage that the ease of near-input construction can be improved.

1 is a cross-sectional plan view showing a connection structure of the present invention,
2a to 2c is a flow chart showing a state in which the PHC file is fastened by the connection structure of the present invention,
3 is a view showing a first connector as a configuration of the connection structure of the present invention,
4 is a view showing a second connector as one configuration of the connection structure of the present invention,
5 is a side cross-sectional view showing an embodiment of the connection structure of the present invention,
6 is a view showing another embodiment of the present invention.

Hereinafter, the configuration and operation of the present invention will be described in more detail based on the accompanying drawings. In describing the present invention, terms or words used in the present specification and claims are based on the principle that the inventor can properly define the concept of terms in order to best describe his or her invention in the best way. It must be interpreted as a meaning and concept consistent with the technical idea of.

The connection structure (1) of the present invention is composed of a ring portion (21) that is coupled to the lower surface of the upper PHC pile (P) and forms a polygonal cross section and a protruding border (22) protruding downward from the outside of the ring portion (21). A first connector 2 that is formed so that a receiving space P1 is formed between the outer side of the protruding border 22 and the lower surface of the upper PHC pile P; A second connector 3 coupled to the upper surface of the lower PHC pile P and forming a polygonal cross-section to contact the ring portion 21 and the protruding border 22; It characterized in that it comprises; a transverse coupling bolt (6) that is inserted into the protruding border 22 and the second connector (3) of the first connector (2) in the receiving space (P1).

That is, the present invention combines the first connector 2 by bolting to the upper PHC pile P and the second connector 3 by bolting to the lower PHC pile P, as shown in FIG. 2A. As shown in the first connector (2) and the second connector (3), the upper PHC file (P) and the lower PHC file (P), respectively, are connected to the first connector (2) and the second connector (3). As shown in Fig. 2c, the first connector 2 and the second connector 3 are fastened with a transverse coupling bolt 6 to make the connection between the PHC piles P, so that each bolting operation is performed. It can be performed by the impact for fastening the bolts, so that the joint operation is easy without welding. Particularly, the head 62 of the transverse coupling bolt 6 is accommodated in the accommodation space P1 to control the external exposure of the head 62, so that although not shown in the drawing, the PHC file P of the casing is not shown. It is to make the entry work easy.

The first connector 2 is coupled by bolting to the lower surface of the upper PHC pile P, as shown in FIG. 3, and the ring portion 21 forming a polygonal cross section and protruding downward from the outside of the ring portion 21 Consisting of a protruding border 22, a bolt hole 211 is formed in the ring portion 21 so that the first bolt 4 penetrates the bolt hole 211 and is disposed on the lower surface of the upper PHC pile P. It is to ensure that the 1 connector 2 is fixed.

In the protruding border 22, a coupling hole 221 is perforated so that the transverse coupling bolt 6 penetrates.

The first connector (2) is formed of a polygonal cross-section, and the diameter of the cross-section is configured to be smaller than the diameter of the PHC file (P). When mounted, between the outer side of the protruding border 22 and the lower surface of the upper PHC file (P) The accommodation space P1 is formed so that the head 62 of the transverse coupling bolt 6 is accommodated in the accommodation space P1 formed in this way, so that the ease of entering the casing is facilitated.

Although not shown in the drawings, during construction, drilling is performed using a casing and a PHC file (P, a PHC file having a connection) is inserted after distribution inside the casing. This problem is controlled as the first connector 2 having a polygonal shape in cross section is presented.

It is reasonable that the first connector 2 is made of a steel material having a greater rigidity than a PHC pile P made of concrete.

The bolt hole 211 and the coupling hole 221 are to be formed at alternating positions so that mutual interference does not occur when fastening the first bolt 4 and the transverse coupling bolt 6 respectively.

The second connector 3 is coupled by bolting to the upper surface of the lower PHC pile P, and is in contact with the ring portion 21 and the protruding border 22. In the case of the second connector 3, the cross section is also polygonal. It is characterized by consisting of.

As described above, as the cross sections of the first connector 2 and the second connector 3 are made of opposing polygons, in addition to the above-mentioned functions, resistance to warpage and the like in the PHC file P connection is also improved.

The second connector 3 is a receiving groove while forming a recess groove-shaped receiving groove 31 so that the head 42 of the first bolt 4 and the head 52 of the second bolt 5 are accommodated on the upper surface. A bolt hole 32 is formed so that the body 51 of the second bolt 5 penetrates in communication with the 31, and the second connector 3 is inserted as the body 51 is inserted into the lower PHC pile P Is to be fixed to the lower PHC file (P).

In addition, the outer periphery of the second connector (3) is formed with a coupling hole (33) to face the coupling hole (221) formed in the first connector (2), the body 61 of the transverse coupling bolt (6) The first connector 2 and the second connector 3 are fastened by being fastened to the coupling hole 221 formed in the first connector 2 and the coupling hole 33 formed in the second connector 3.

Also in this case, the coupling hole 33 formed in the second connector 3 and the receiving groove 31 are formed in alternating positions, and mutual interference occurs when the transverse coupling bolt 6 and the second bolt 5 are fastened. This should be avoided.

As shown in FIG. 2B by the first connector 2 and the second connector 3, when the upper PHC file P and the lower PHC file P are connected, the protruding border 22 of the first connector 2 A first bolt (4) for fixing the first connector (2) to the upper PHC file (P) while the receiving groove (31) of the second connector (3) is made to hold the second connector (3) from the outside. ) The first connector 2 and the second connector 3 by simultaneously accommodating the head 52 of the second bolt 5 securing the head 42 and the second connector 3 to the lower PHC pile P The structure that holds) is formed so that a structurally robust joint is formed.

In addition, in the present invention, as shown in FIG. 5, it is possible to facilitate fastening in the PHC file P of the first connector 2 and the second connector 3 and to facilitate the lifting operation of the PHC file P, as well as safety. It has been proposed an embodiment to increase the.

In this embodiment, as shown in Figure 5, the PHC pile (P) has a buried nut (9) in which a thread (91) is formed on the inner periphery, and the first bolt (4) is embedded in the buried nut (9). ) And the second bolt 5 are provided to be fastened.

That is, the landfill nut (9) is formed at both ends of the PHC file (P) to connect the PHC file (P) of the first connector (2) and the second connector (3) as a connection operation between the PHC files (P) in the field. When the first bolt (4) and the second bolt (5) are respectively fastened to the buried nut (9) without separate perforation, the PHC file (P) of the first connector (2) and the second connector (3) The fastening is to be made, and it is possible to facilitate the easy lifting operation through bolting to the filling nut 9 even during the lifting operation separately from the connecting operation.

In addition, in the present embodiment, as shown in FIG. 5, the PHC pile (P) has a stranded wire (11) formed at both ends of the stranded head (11) to be settled so that the PHC pile (P) has a stranded wire (10). More examples are presented. That is, the buried nut 9 functions as a coupler or anchorage. To this end, a sheath ball 92 is formed at one end of the buried nut 9, and the retracted wire 10 penetrates the sheath ball 92 while the buried nut 10 penetrates. It is to settle in the state of tension in (9) so that prestress is introduced into the PHC pile (P).

That is, the construction of the buried nut 9 of the present embodiment facilitates assembly, ease of lifting and safety, and ease of introduction of prestress.

On the other hand, when applying the connection structure (1) of the present invention shown in FIG. 2A, etc., the impact load is transmitted to the joint by rock or the like in the ground when the PHC pile (P) is hit, especially the first bolt (4) and When energy, such as vibration, is applied to the portion inserted into the PHC file (P) in the second bolt (5), a crack may occur in the PHC file (P) in which the bolt is inserted, and these cracks are connected between the PHC files (P) It can also be a factor that weakens.

Accordingly, in the present invention, as shown in FIG. 6, the energy transmitted to the joint is relaxed by controlling the PHC file (P), which is connected to the joint, to control the occurrence of cracks in the PHC file (P) with the bolt mentioned above. It is presented an embodiment to do so.

In this embodiment, as shown in Figure 6, so that the buffer pad 8 is configured on the inner periphery of the receiving groove 31 and the head 42 of the first bolt 4 and the inside of the buffer pad 8 It is characterized in that the head 52 of the second bolt 5 is configured to be accommodated.

That is, the tubular buffer pad 8 forming the hollow is placed in the receiving groove 31, and the head 42 of the first bolt 4 and the second bolt 5 are placed in the hollow of the buffer pad 8 The head 52 is to be accommodated.

When the lateral load acts in the opposite direction between the upper PHC pile (P) and the lower PHC pile (P) due to the impact load, the lateral load is transmitted to the buffer pad 8 through the heads 42 and 52, respectively. By easing the lateral load, the lateral load is controlled to be transmitted to the bodies 41 and 51 inserted in the PHC pile P. That is, the lateral load is transferred to the bodies 41 and 51 inserted in the PHC file P, thereby controlling the problem of cracking.

The buffer pad 8 should be made of an elastic material such as rubber to relieve and absorb the transmitted load.

In addition to this, in this embodiment, the bolt hole 211 formed in the ring portion 21 so that the first bolt 4 is inserted and the bolt hole formed in the second connector 3 so that the second bolt 5 is inserted Each of the bodies 41 and 51 of the first bolt 4 and the second bolt 5 is provided with a hollow buffer tube 7 as an elastic material, respectively, to the hollow of the buffer tube 7, respectively. An example is presented to be fastened to the PHC file P while penetrating.

When the lateral load acts in the opposite direction between the upper PHC pile (P) and the lower PHC pile (P) due to the impact load, the lateral load is a part of the head (42, 52) and the body (41, 51), respectively. It is to maximize the efficiency of alleviating the lateral load by being transmitted to the buffer pad (8) and the buffer tube (7), respectively. In other words, by bringing the area to alleviate and absorb the load, it is to provide a joint that can resist the impact even if any impact energy is imparted to the driving process of the connected PHC pile (P).

Through the above description, those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical idea of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

1: The present invention 2: First connector
3: 2nd connector 4: 1st bolt
5: second bolt 6: transverse coupling bolt
7: buffer tube 8: buffer pad
9: Landfill nut 10: Steel wire

Claims (7)

A first connector configured to be formed on the lower surface of the upper PHC pile and formed of a ring portion forming a polygonal cross-section and a protruding border projecting downward from the outer side of the ring portion to form an accommodation space between the outer side of the protruding border and the lower surface of the upper PHC pile;
A second connector coupled to an upper surface of the lower PHC pile and forming a polygonal cross section to contact the ring portion and the protruding border;
Including the transverse coupling bolt is inserted into the protruding border of the first connector and the second connector in the receiving space;
A recessed groove is formed in the upper surface of the second connector so that the head of the first bolt that couples the first connector to the lower surface of the PHC file and the head of the second bolt that couples the second connector to the upper surface of the PHC file are accommodated. ,
In the receiving groove, a buffer pad is formed on the inner periphery, and the head of the first bolt and the head of the second bolt are accommodated inside the buffer pad. .
delete According to claim 1,
Both ends of the PHC pile are formed with a buried nut in which an inner thread is formed, and the first bolt and the second bolt are fastened to the buried nut.
According to claim 3,
A connection structure for a welded PHC file with improved ease of construction, characterized in that a steel wire is embedded in the PHC file so that the strand head is fixed to the buried nut at both ends of the PHC file.
According to claim 1,
The protruding border and the second connector are perforated so that the transverse coupling holes are opposed to each other so that the transverse coupling bolts are fastened, and the transverse coupling holes formed in the second connector are alternately formed with the receiving groove. Connection structure of welding-free PHC file that improves the ease of construction.
delete According to claim 1,
A bolt hole is formed in the second connector so that the ring part and the second bolt are inserted so that the first bolt is inserted, and a hollow buffer tube is provided as an elastic material in the bolt hole, and the first bolt and the second bolt are buffered. Connection structure without welding PHC pile, which improves the ease of construction, characterized by being fastened while passing through the hollow of the pipe.

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