KR100715504B1 - Formation method for iron rod frame of pretensioned spun high strength concrete piles - Google Patents

Abstract

The present invention relates to a reinforcing long knitted fabric assembly method for manufacturing high-strength concrete piles by a pretension method. Reinforcing rod long assembling method for manufacturing high-strength concrete piles according to the present invention, the PC steel rod for pre-stress introduction (S11), the reinforcement is reinforced by using a fixing device (S12), and the spiral wire welding (S13), Fixing the caulked both ends of the pre-stressed PC steel bar (S14), and fixing the caulking treatment of the reinforcement (S15) is characterized in that proceeds sequentially. According to the present invention, the tensile strength and bending resistance are improved and optimized high strength concrete through concrete considerations of the characteristics of the structural structures, load conditions, stress conditions applied during construction, construction ground conditions, construction methods and construction site conditions Can provide stakes.

Tensile, Reinforcing Bar, Spiral Wire, Flexural Resistance, High Strength, PHC Pile

Description

Formation method for iron rod frame of pretensioned spun high strength concrete piles}

The following drawings attached to this specification are illustrative of the preferred embodiments of the present invention, and together with the detailed description of the invention to serve to further understand the technical spirit of the present invention, the present invention described in such drawings It should not be construed as limited to.

1 is a process flow chart for explaining a method for knitting and assembling the reinforcing rod for manufacturing high-strength concrete piles by the pretension method according to the present invention.

Figure 2 is a process flow chart for explaining the process of manufacturing a high-strength concrete pile by a pretension method according to the present invention.

Figure 3a is a partial perspective view showing in detail the fixing end of the reinforcing rod for producing a high-strength concrete pile by the pre-tension method according to the invention.

FIG. 3B is a top perspective view of the copper plate 30 shown in FIG. 3A.

Figure 4a is a partial perspective view showing in detail a shoe (Shoe) part of one embodiment of the assembly of the iron end in the tension of the reinforcing rod for producing a high-strength concrete pile by the pre-tension method according to the present invention.

FIG. 4B is a partially enlarged view of the tensile muscle binding hole shown in FIG. 4A in detail.

4C is an inverted perspective view of the set plate 49 shown in FIG. 4A.

4d illustrates a cross-sectional structure of the second coupling hole 48b shown in FIG. 4a.

Figure 5 is a partial perspective view showing in detail the joint ring (Joint ring) part of an embodiment of the iron assembled to one end of the reinforcing rod for manufacturing a high-strength concrete pile by the pre-tension method according to the present invention.

The present invention relates to a method for assembling reinforcing rods for the preparation of high strength concrete piles by a pretensioning method, and more particularly, because tensile strength is applied to reinforcing bars arranged side by side with PC steel bars for introducing tensile force. The present invention relates to a method for knitted fabrication of reinforcing bars used to manufacture high-strength concrete piles by a pretension method in which additional reinforcing bars are disposed for the purpose of increasing.

In order to install a predetermined flooring structure on the ground, it is obvious that the ground must have sufficient bearing capacity for the load of the flooring structure. Soft ground is a ground that does not have sufficient bearing capacity in response to ground conditions or load conditions of flooring structures. Therefore, the soft ground should be prepared before the installation of the flooring structure, and the most common method among these measures is to make the load of the flooring structure evenly and safely to the support layer. It is a piling method to pre-construct to reach. The pile construction method is the most common method of constructing concrete concrete piles produced at the factory using a diesel hammer, steam hammer, or hydraulic hammer, using a blow method or landfilling after drilling the ground. Considering the gender, blow construction is more commonly used in land construction than in landfill construction.

As a concrete pile used to reinforce the soft ground, high strength concrete piles are commonly used. According to the Korean Industrial Standard (KS), the compressive strength of concrete manufactured by applying centrifugal force is 78.5N / mm2 (800㎏f / ㎠). The high strength concrete pile (hereinafter referred to as "PHC pile") by the above-mentioned pretension method is prescribed | regulated. The PHC pile (Pretensioned spun high strength concrete piles) has a larger compressive stress than the conventional PC piles, and thus has a greater bearing capacity for axial load, and the prestress is uniformly introduced into the prestress. And excellent flexural strength and absorb most of the tensile stress caused by the reflected wave generated at the time of driving.Therefore, there is little risk of cracking, so it is easy to penetrate into the hard layer in the ground and penetrate deeper and harder layers. There is an advantage that this can be done easily. In addition, the PHC pile has the advantage that it can exhibit excellent effects in the soft ground treatment as a suitable pile for seismic design that is subjected to axial and horizontal forces at the same time because the concrete flexural tensile stress is large.

Conventional PHC piles are classified into 300mm, 350mm, 400, 450, 500, 600, 700, 800, 900, 1000, 1100 and 1200, respectively, according to their outer diameter, and class A and B depending on the size of the effective prestress. Species and C (hereinafter referred to as A, B and C, respectively).

In the selection of such concrete piles, it is necessary to design the appropriate type considering the characteristics of the structural structures and the load conditions. However, on the actual work site, ready-made concrete piles, especially class A concrete piles, which are manufactured according to Korean industrial standards without considering various specific conditions or situations, are most commonly used. Although concrete piles complying with Korean industrial standards are not optimized for the actual construction site conditions, the consideration of these specific conditions should be taken into account when constructing general factories or housing sites that are not important structures. It is not enough. For this reason, it will be difficult to deny that there is a risk of considerable damage or destruction in the structure when an external force such as an earthquake is applied to the constructed flooring structure after a simple ground construction is performed.

In addition, the load of the pile after the construction is also important for concrete piles, but the piles should be selected with sufficient consideration of the stress conditions applied to the pile. It is industry practice that we rarely do. However, when the pile is actually installed, the risk is due to the fact that the pile is not visually captured about the breakage of the pile despite the fact that the pile is bent or the lateral crack is generated due to the excessive stress applied to the pile. Ignored or overlooked

On the other hand, with regard to the condition of the ground to be constructed, which is the most important factor in the selection of concrete piles, by selecting the pile in consideration of the load conditions applied to the selected pile, the pile breakage for the situation of the construction ground is sufficient. Due to the stress generated in the unexpected state, there is a frequent problem that the construction results lead to insolvent.

Concrete piles must have different results as a result of the construction of the piles. Although the stress applied to piles during pile construction differs depending on the construction method, it is common practice to consider only the load condition of the upper structure as the basis of pile selection in construction, which causes the failure of concrete pile construction. have.

Finally, when the flattening condition of the construction site is poor, especially when the length of the concrete pile is more than 10 m, the damage of the internal pile that is not visually captured due to the bending stress exceeding the allowable stress occurs during the transport of the concrete pile Although it may occur, it is also the industry's reality to construct a pile in which the cause of construction failure is in place without actually considering the defects of the pile itself according to such specific field work conditions.

As described above, concrete piles that meet the Korean industrial standards are considered in consideration of the load conditions without any specific consideration of the characteristics of the structural structures, the load conditions, the stress conditions applied to the construction, the construction ground conditions, the construction method, and the construction site conditions. As a way to solve the various problems caused by the selection, it is economical and construction by providing optimized concrete piles that can sufficiently meet specific situations and conditions, rather than concrete piles that match the types suggested by Korean industrial standards. In connection with the exclusion of bad factors in the city, efforts to improve the conventionally known PHC pile structure have been continuously made in the related field, and the present invention has been devised based on the technical background.

The technical problem to be achieved by the present invention on the basis of the above-mentioned conventional problems, optimization through the concrete considerations of the characteristics of the structural structure, load conditions, stress conditions applied during construction, construction ground conditions, construction method and construction site conditions, etc. It is an object of the present invention to provide a method for organizing the reinforcing reinforcing steel for PHC pile manufacturing can achieve this technical problem, and to improve the structure of the PHC pile.

In order to achieve the technical problem to be achieved by the present invention, the reinforced long knitted fabrication method for manufacturing high-strength concrete piles by the pretension method according to the present invention, in the reinforced long knitted fabrication method for manufacturing high-strength concrete piles by the pretension method, (S11) are arranged in the axial direction of the high-strength concrete pile, the two ends of the pre-coking PC steel rods for caulking 6 to 24 are arranged so as to be spaced at equal intervals, the one end is fixed to the chuck plate of the knitting machine step; (S12) fixing one end of the 6 to 24 reinforcing bars, both ends of which are caulked, to the first fixing member to be disposed between the prestressed PC steel bars; (S13) enclosing the pre-stressed PC steel bar and reinforcing bar in a spiral outer circle, and arranging the spiral iron wire to be welded and bound at the outer portion; (S14) fixing both ends of the pre-stressed PC steel bar for caulking, one end of which is fixed to the second fixing member, and the other end of which is fixed to the third fixing member; And (S15) fixing both ends of the caulking end of the reinforcing bar, one end of which is fixed to the second fixing member, and the other end of which is fixed to the third fixing member.

At this time, the reinforcing bar used in the step (S12) is preferably used if a steel bar or steel wire that can be suitably used as a reinforcing bar such as PC steel bar or hard steel wire, preferably fixed to one end of the reinforcing bar of the step (S12) (1) The fixing member shall be provided with a predetermined fixing jig (batch device) that can be pulled separately from the steel plate or knitting machine chuck to hold the steel bar and pull the steel wire or steel bar sufficiently when the chuck plate is retracted for knitting. It is preferable to use.

On the other hand, the second fixing member of the step (S14) and (S15) is a fixed plate or a joint ring, when the second fixing member of the step (S14) is a fixed plate once the coking process of the PC steel rod for pre-stress introduction It is preferable that the method for fixing the fastening nut is pre-fitted to the caulked end of the pre-stressed PC steel bar to be fastened and fixed with the bolt passing through the through hole formed in the fixing plate. When the second fixing member of the step (S15) is a fixing plate, the method for fixing the caulked end of the reinforcing bar, the nut is inserted into the caulking end of the reinforcing bar in advance through the through hole formed in the fixing plate and It is preferable to be fastened and fixed. Further, when the second fixing member of the step (S14) is a joint ring, the method of fixing the caulked end of the pre-stressed PC steel bar, the coked end of the pre-stressed PC steel bar is connected to the joint ring. It is preferable to be fitted into the fixing hole formed. When the second fixing member of the step (S15) is a joint ring, the method for fixing the caulked end of the reinforcing bar, the nut previously fitted to the caulked end of the reinforcing bar is passed through the through hole formed in the joint ring It is preferable to be fastened and fixed to the bolt, or to be fixed by being fitted into the fixing hole formed in the joint ring of the caulked end of the reinforcing bar.

The third fixing member of the step (S14) and (S15) is a shoe or a joint ring, and using the third fixing member of the step (S14) to fix the caulked other end of the pre-stressed PC steel bar. Preferably, the other end of the caulking treatment of the pre-stressed PC steel bar is inserted into the fixing hole formed in the shoe or the joint ring as the third fixing member, it is preferable to be fixed, using the third fixing member of the step (S15) The method of fixing the other end of the caulking treatment, the nut which is pre-fitted to the caulked end of the reinforcing bar is fastened and fixed to the bolt passing through the through hole formed in the shoe or joint ring, or the caulked end of the reinforcing bar is fixed It is preferable to be fitted in the fixing hole formed in the shoe or the joint ring to be fixed.

Hereinafter, the present invention will be described in detail with reference to examples, and detailed description will be made with reference to the accompanying drawings in order to help understanding of the present invention. However, embodiments according to the present invention can be modified in many different forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. Embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. Meanwhile, in the present specification, the term 'caulking treatment' means that by forming a blunt head portion by pressing the tip or end portion of a steel rod or steel wire, the rod or steel wire penetrates the through hole freely, but the head portion formed at the tip portion or the end portion thereof. It is mounted on the jaw of the through-hole means that the treatment is to be made, used throughout the present specification with the same meaning.

1 is a process flow chart for explaining a method for knitting and assembling the reinforcing rod for manufacturing high-strength concrete piles by the pretension method according to the present invention. As shown in Figure 1, the step of manufacturing the reinforcing bar, after fixing the PC steel bar for pre-stress introduction to the copper plate, and fixed it to the chuck plate of the knitting machine (S11), and reinforce the reinforcement to the copper plate or bite device It can be seen that the step (S12), the reinforcing spiral wire (S13), to fix the caulk both ends of the pre-stressed PC steel bar (S14), and to fix the caulk both ends of the reinforcement (S15).

Pre-stressed PC steel bars are arranged to be spaced at equal intervals, and the step (S11) of fixing the end of the copper plate is inserted into the chuck plate of the knitting machine, 6 to 24 pre-stressed PC steel rods in the axial direction of the high-strength concrete pile It is a step of placing the fixed end of the copper plate fixed to the chuck plate of the knitting machine. At this time, the front end and the end of the prestressed PC steel bar was caulked. The tip end of the pre-stressed PC steel bar may be fixed to the bolt plate by the bolt / nut coupling method used as a fixing plate when tensioning. To this end, before the caulking treatment for the tip end portion of the pre-inserted nut is fastened to the bolt through the through-hole formed in the fixing plate, it is preferable to be fixed, and the caulking end portion of the PC steel rod for pre-stress introduction is to the joint ring It may be fitted to a fixed hole provided.

In step S12 of reinforcing bar reinforcement, the reinforcing bar was prepared to have an appropriate length according to the fixing method of the reinforcing bar, and the front end and the end part were caulked. The front end of the reinforcing bar may be fixed in a bolt / nut coupling method to the copper plate utilized as a fixing plate when tensioning. For this purpose, it is preferable to prepare in the state which screwed in before the caulking process with respect to the front-end | tip part. On the other hand, the caulking end portion of the reinforcing bar may be fixed by being fitted in the fixing hole of, for example, dumbbell-shaped provided in the joint ring, the reinforcing bar in this case is the same length as the pre-stressed PC steel bar used in the step (S11) Used. In addition, the nut pre-fitted to the caulking end of the reinforcing bar may be fastened and fixed with the bolt passing through the through hole formed in the joint ring. In this case, the reinforcing bar is used as the pre-stressed PC steel bar used in the step (S11). It is prepared and used as the length subtracted by the length of the nut that fits in. On the other hand, the distal end of the reinforcing bar can be fixed to fit in the fixing hole of, for example, a dumbbell-shaped provided in the shoe or joint ring, the bolt through which the nut previously fitted into the caulked end of the reinforcing bar through the through hole formed in the joint ring It may be fastened and fixed with. At this time, the reinforcing bar used in the step (S12) is preferably used if a steel bar or steel wire that can be suitably used as a reinforcing bar, such as PC steel bar or PC hard steel wire, and the type of the reinforcing bar is selected, of course, The thickness may be adjusted to correspond to an appropriate tensile and bending strength. On the other hand, the method of fixing one end of the reinforcing bar in the step (S12) to the first fixing member, the method of fixing one end of the pre-stressed PC steel bar used in the step (S11), may use the same method as described above However, the steel plate or steel rods installed separately from the knitting machine chuck plate are grasped, respectively, and the chuck plate bogie is placed in a fixing jig (gripping device) that can pull the steel wire or steel rod sufficiently when reversing. You may.

The step (S13) of reinforcing the spiral wire is wrapped in a spirally circumferentially wrapped pre-stressed PC steel rod and reinforcing bar for placement fixed by going through the steps (S11) and (S12) to be welded and bonded at the external part This step is to reinforce the spiral wire.

Fixing both ends of the caulked end of the pre-stressed PC steel bar (S14), one end of the caulking both ends of the pre-stressed PC steel bar, one end is fixed to the second fixing member, the other end to the third fixing member It is the step of fixing. In this case, the second fixing member may be a fixing plate or a joint ring. In the case where the second fixing member is a fixing plate, it is preferable that the reinforcing band is tightly fixed to the fixing plate while the nut fitted in the caulked end of the prestressing PC steel bar is fastened and fixed with the bolt passing through the through hole formed in the fixing plate. Do. On the other hand, when the second fixing member is a joint ring, it is preferable that the caulked end of the pre-stressed PC steel bar is inserted into a fixing hole of, for example, a dumbbell type formed in the joint ring, and is fixed. The nut fitted in the caulked end of the may be fastened and fixed with the bolt passing through the through hole formed in the joint ring. In addition, the third fixing member may be a shoe or a joint ring, and in this case, a caulking end of the pre-stressed PC steel bar is formed in a shoe or a joint ring, for example, a dumbbell-shaped fixing hole formed in the third fixing member. The nut may be inserted into the pre-stressed end of the pre-stressed PC steel bar, and may be fastened by being fastened with the bolt passing through the through hole formed in the shoe or the joint ring as the third fixing member.

The step (S15) of fixing both ends of the caulking process of the reinforcing bar, one end of the caulking both ends of the reinforcing bar is fixed to the second fixing member, the other end is fixed to the third fixing member. When the second fixing member is a fixing plate or a joint ring, a nut previously fitted to both ends of the caulked reinforcing bar may be fastened to a bolt passing through a through hole formed in the fixing plate or the joint ring. On the other hand, when the second fixing member is a joint ring, both ends of the caulked reinforcing bar may be inserted into a fixing hole of, for example, a dumbbell type formed in the fixing plate or the joint ring. In addition, in the case of the shoe or the joint ring, the third fixing member may allow both ends of the caulking portion of the reinforcing bar to be fitted into and fixed to, for example, a dumbbell-shaped fixing hole provided in the shoe or the joint ring. Nuts pre-fitted at both ends may be fastened and fixed with bolts passing through the through holes formed in the shoe or the joint ring.

By using the reinforcing bar prepared through the five steps (S11 to S15) as described above, after the concrete pile manufacturing process can be obtained high strength concrete pile of the desired bar.

Figure 2 is a process flow chart for explaining the process of manufacturing a high-strength concrete pile by a pretension method according to the present invention. As shown in FIG. 2, the concrete is blended (S21), and as described with reference to FIG. 1, the reinforcing bars are knitted and assembled (S22), and the prepared reinforcing bars are placed in a mold and assembled (S23). Subsequently, the prepared concrete is introduced into the mold (S24), and the prestress is introduced into the PC steel rod and reinforcing bar for the prestress introduction described with reference to FIG. 1 (S25), and the centrifugal molding is carried out (S26), and then the curing process ( S27) and the demolding process (S28) proceeds sequentially. All other processes except for the step of organizing and assembling the reinforcing bar (S22) will be referred to as well-known general steps already known in the method of manufacturing concrete piles by centrifugal molding. It is apparent that even if there is no obstacle to those skilled in the art.

Figure 3a is a partial perspective view showing in detail the fixing end of the reinforcing rod for the production of high-strength concrete pile by the pre-tension method according to the present invention, Figure 3b is a perspective view of the upper plate 30 of Figure 3a .

As shown in Figs. 3A and 3B, eight prestressed PC steel rods 31 for equally spaced intervals were arranged in the axial direction of the high-strength concrete pile. The tip end of the pre-stressed PC steel rod 31 is caulking treatment, and the nut 32a, which is fitted to surround the caulking end portion, is used as a fixing plate fixed to the chuck plate of the knitting machine during tensioning 30. The first bolt coupling hole (37) provided in the body (30a) of the first bolt (32b) fitted to be screwed to be fixed.

In addition, eight reinforcing bars 33 disposed between the prestressing PC steel rods 31 are prepared to have the same length as the prestressing PC steel rods 31, and the front end portion thereof also includes the PC steel rods for prestressing ( As in 31), a caulking treatment is performed, and a second bolt (3) fitted through the second bolt coupling hole 38 provided in the body 30a of the copper plate is fitted with a nut 36a fitted to enclose the caulked front end portion. 36b) to be screwed and fixed.

On the other hand, the central portion of the copper plate 30 is prepared in the form of a doughnut provided with an inner hole of the concrete pile to be formed later and a through hole 30b which can be penetrated, and the PC steel bar for introducing the prestress on the body 30a of the copper plate. The first bolt coupling hole 37 into which the first bolt 32b for fixing 31 is fitted, and the second bolt coupling hole 38 into which the second bolt 36b for fixing the reinforcing bar 33 is fitted. A total of 16 bolting holes are formed on the same circumference, each of which is eight at equal intervals. At this time, the reinforcing bar 33 may be used by selecting a steel bar or steel wire that can be suitably used as a reinforcing bar, such as PC steel bar or PC hard steel wire. A cylindrical reinforcing band 39 formed with an embossed belt may be tightly fixed to the lower portion of the body 30a of the copper plate.

As can be seen through the copper plate 30 shown in Figure 3b, a central through hole 30b is formed in the inner center of the copper plate body 30a, the upper surface of the copper plate body 30a surrounding it constitutes the same plane However, the region where the first bolt coupling hole 37 and the second bolt coupling hole 38 are formed is thicker than the edge region surrounding the periphery thereof to form a circular step, and the edge region of the step is concrete Allow it to be mounted in a cell of a mold for pile production. The circular jaw formed on the bottom of the copper plate 30 is preferably fixed to the end of the various reinforcement line to be placed inside the concrete pile and at the same time can be mounted on the cell of the mold so as not to be spaced apart.

The diameters of the first bolt coupling hole 37 and the second bolt coupling hole 38 described above are interlocked with the thicknesses of the first bolt 32b and the second bolt 36b fitted thereto. The diameter of one bolt coupling hole 37 may be larger or the same as that of the second bolt coupling hole 38, which considers that the thickness of the PC steel bar for prestressing is thicker or the same as the thickness of the reinforcing bar. Thus, to give a fixed force in proportion to this.

Figure 4a is a partial perspective view showing in detail a shoe (Shoe) part of an embodiment of the assembly of the steel at the end of the tension when the reinforcing rod for manufacturing high-strength concrete pile by the pre-tension method, Figure 4b is 4A is a partially enlarged view illustrating the tensile muscle binding hole shown in FIG. 4A, and FIG. 4C is a top perspective view of the set plate 49 shown in FIG. 4A, and FIG. 4D is a second coupling hole shown in FIG. 4A. The cross-sectional structure of 48a is shown.

As shown in Figures 4a to 4d, it can be understood that one embodiment of the other end is arranged in the tensile end corresponding to one end is arranged as a fixed end when the high-strength concrete pile is tensioned. As shown, eight prestressed PC steel rods 31 for circumferential intervals were arranged in the axial direction of the high-strength concrete pile. The distal end portion 31b of the pre-stressed PC steel rod is caulked so as to fit into the left hole 47a of the fastening hole 47 of the dumbbell-shaped fastening hole 47 formed on the upper surface of the body 40a of the shoe 40.

A central through hole 49b is formed in the set plate body 49a coupled to the tension plate when the concrete pile is tensioned, and the first plate through which the set plate fixing bolt 42 is fitted into the set plate body 49a. The second through hole 46a into which the hole 42a and the reinforcing bar fixing bolt 46 are fitted is alternated with each other, and a total of 16 through holes are formed on the same circumference, each of eight. The left side hole 47a of the dumbbell-type fastening hole 47 to which the PC steel bar 31 for prestressing is fastened is fixed by fitting the distal end 31b of the PC steel bar 31 for caulking prestressing. The female screw formed on the wall of the right hole 47b of the 47 is screwed and fixed to the set plate fixing bolt 42 fitted through the first through hole 42a formed in the body 49a of the set plate 49. do. The eight reinforcing bars 33 arranged at equal intervals between the prestressing PC steel bars 31 at equal intervals are subtracted from the length of the prestressing PC steel bars 31 by the length of the reinforcing bar fixing nut 46b. To prepared length. At this time, the reinforcing bar 33 may be used by selecting a steel bar or steel wire that can be suitably used as a reinforcing bar, such as PC steel bar or PC hard steel wire. On the other hand, the distal end of the reinforcing bar 33 is also caulked similarly to the distal end 31b of the PC steel bar for prestressing. The end of the caulked reinforcing bar 33 is caulked similarly to the PC steel bar 31 for introducing the prestress, and the reinforcing bar fixing nut 46b fitted to surround the caulked end is set plate 49. After passing through the second through hole (46a) formed in the body (49a) of the) is formed between the dumbbell-shaped fastening holes 47 formed in the body (40a) of the shoe 40 disposed below It is screwed and fixed with the reinforcing rod fixing bolt 46 passing through the cylindrical fastening hole 48a.

On the other hand, the distal end of the pre-stressed PC steel rod can be fixed in the same manner as the reinforcing bar described with reference to Figures 4a to 4d is coupled to the shoe, while the distal end of the reinforcing bar, Figures 4a to 4d It can be fixed and coupled in the same manner as the end portion of the pre-stressed PC steel bar for the introduction described with reference to the shoe, although not shown in the various coupling method is obviously belongs to the technical scope of the present invention.

The body 40a side of the shoe 40 is provided with a reinforcing band 40c having one or more embossed belts to reinforce the binding with the concrete, and two types on the same circumference of the upper surface of the body 40a of the shoe. The fastening holes of, that is, the dumbbell-shaped fastening hole 47 and the cylindrical fastening hole (48a) is formed of a total of 16 fastening holes, each of eight so as to alternate with each other at equal intervals. On the other hand, the central portion of the upper surface of the body 40a of the shoe may be formed in a concave portion formed by the concave portion (40b), and may be manufactured in a closed form, if necessary, may be manufactured in an open form having a closed or penetrating hole of the balance.

5 is a partial perspective view showing in detail a joint ring part of an embodiment of the hardware to be assembled to one end of the reinforcing rod for manufacturing a high-strength concrete pile by the pre-tension method according to the present invention. The jointing part may be adopted as an embodiment of one end that is disposed as a fixed end when the concrete pile is tensioned, whereas the other end that is arranged as a tension end corresponding to one end that is disposed as a fixed end when the concrete pile is tensioned May be adopted.

As shown in FIG. 5, eight prestressed PC steel bars 31 arranged at equal intervals on the same circumference were arranged in the axial direction of the high-strength concrete pile. The pre-stressed PC steel bar 31 is caulked at its distal end 31c so as to fit into and fix the left hole of the dumbbell-shaped fastening hole 57 (see FIG. 4B) formed on the upper surface of the body 50a of the joint ring 50. have. The dumbbell-type fastening hole 57 formed in the body 50a of the joint ring has the same structure as the dumbbell-type fastening hole 47 described in FIG. 4B, and the cylindrical fastening hole 58b formed in the body 50a of the joint ring. ) Has the same structure as the fastening hole 48b described in FIG. 4D.

The eight reinforcing bars 33 arranged at equal intervals on the same circumference between the prestressing PC steel bars 31 are subtracted from the length of the prestressing PC steel bars 31 by the length of the reinforcing bar fixing nuts 46b. To prepared length. The distal end of the reinforcing bar 33 is also caulked similarly to the distal end 31c of the PC steel bar for prestressing. At this time, the reinforcing bar 33 may be used by selecting a steel bar or steel wire that can be suitably used as a reinforcing bar, such as PC steel bar or PC hard steel wire.

A central through hole 59b is formed in the set plate 59 and the body 59a connected to the tension plate when the concrete pile is tensioned, and the set plate fixing bolt 52 is fitted into the set plate body 59a. The second through hole 56a, into which the first through hole 52a and the reinforcing bar fixing bolt 56 are fitted, is alternately formed on the same circumference. On the other hand, the set plate 59 has the same structure as the set plate described in Figure 4c.

In the body 50a of the joint ring, the left hole (see 47a of FIG. 4B) of the dumbbell-type fastening hole 57 to which the PC steel rod 31 for prestressing is fastened is connected to the PC steel bar 31 for caulking prestressing. The front end portion 31c is fitted and fixed, and the right hole (see 47b of FIG. 4B) of the dumbbell-type fastening hole 57 has a female thread formed in the hole wall, and the first through hole 52a penetrating the set plate body 59a. It is screwed and fixed to the set plate fixing bolt 52 fitted in the). The reinforcing bar fixing nut 56b, which is fitted to enclose the distal end of the caulked reinforcing bar 33, passes through the second through hole 56a formed in the body 59a of the set plate 59, and then is disposed thereunder. The reinforcing bar fixing bolts 56 passing through the cylindrical fastening holes 58a formed between the dumbbell-shaped fastening holes 57 formed in the body 50a of the joint ring are screwed and fixed.

On the other hand, the distal end of the pre-stressed PC steel bar can be fixed and coupled in the same manner as the reinforcing bar described with reference to Figure 5 is coupled to the joint ring, while the distal end of the reinforcing bar is introduced with reference to Figure 5 It can be fixed and coupled in the same manner as the end portion of the PC steel bar for coupling to the joint ring, although not specifically illustrated for each of these various modifications, it is obvious that it belongs to the technical scope of the present invention.

Reinforcing band 50c having one or more embossed belts is provided on the side of the body 50a of the joint ring to strengthen the binding with the concrete, and two fastening holes on the upper surface of the body 50a of the joint ring, namely A total of 16 fastening holes are arranged alternately at equal intervals, each of eight of the dumbbell-type fastening hole 57 and the cylindrical fastening hole 58a. In the center of the body (50a) of the joint ring is formed a through hole (50b) that is interlocked with the inner hole of the concrete pile. Meanwhile, the joint portion where the upper surface and the side surface of the body 50a of the joint ring meet is finished in a concave shape, and when the head cap body is placed up and down closely, the V-shaped chamfer is formed at the boundary thereof. By welding the upper and lower joint rings, the concrete piles can be connected up and down.

The joint ring shown in FIG. 5 may be used only at one end selected from the upper and lower parts of the concrete pile as necessary for the purpose of continuous connection of the pile, but in some cases, it is used in connection with other concrete piles in the vertical direction. It may also be adopted at both ends of the concrete pile for the purpose of becoming.

Finishing the reinforcement by wrapping the axial reinforcement in a spiral shape with the iron wire, and binding the spiral wire circumscribed to the PC steel bar 31 and the reinforcing bar 33 in the manner of spot welding, and then to the above-described Figures 3 to 5 The axial reinforcement and fixation of the PC steel bar 31 and the reinforcing bar 33 for prestress introduction at both ends and the center of the reinforcing bar structure were performed.

Optimal embodiments of the present invention described above have been disclosed. Although specific terms have been used herein, they are used only for the purpose of describing the present invention in detail to those skilled in the art and are not intended to limit the scope of the present invention as defined in the claims or the claims.

In the case of assembling and reinforcing the reinforcing bar for manufacturing high-strength concrete piles by the pretension method according to the present invention, the tensile strength and the bending resistance are improved compared to the products known in the art, and the characteristics of the structural structure, load conditions, and construction There is an advantage in that it is possible to provide an optimized high strength concrete pile through concrete consideration of stress conditions, construction ground conditions, construction methods and construction site conditions.

Claims (15)

In the rebar long knitted fabrication method for producing high-strength concrete piles by a pretension method, (S11) are arranged in the axial direction of the high-strength concrete pile, the two ends of the pre-coking PC steel rods for caulking 6 to 24 are arranged so as to be spaced at equal intervals, the one end is fixed to the chuck plate of the knitting machine step; (S12) fixing one end of the 6 to 24 reinforcing bars, both ends of which are caulked, to the first fixing member to be disposed between the prestressed PC steel bars; (S13) enclosing the pre-stressed PC steel bar and reinforcing bar in a spiral outer circle, and arranging the spiral iron wire to be welded and bound at the outer portion; (S14) fixing both ends of the pre-stressed PC steel bar for caulking, one end of which is fixed to the second fixing member, and the other end of which is fixed to the third fixing member; And (S15) of the caulking both ends of the reinforcing bar, one end is fixed to the second fixing member, the other end is fixed to the third fixing member; high-strength concrete piles by the pre-tension method, characterized in that the progress Rebar long knitting assembly method for manufacturing. The method of claim 1, Reinforcing bar used in the step (S12) is a reinforced steel long knitting assembly method for manufacturing high-strength concrete piles by the pre-tension method, characterized in that using a PC steel rod and or hard steel wire. The method of claim 1, The first fixing member for fixing one end of the reinforcing bar in the step (S12) is a high-strength concrete pile manufacturing assembly method for manufacturing high-strength concrete piles by the pre-tension method, characterized in that the copper plate or fixing jig. The method of claim 1, The second fixing member of the step (S14) and (S15) is a reinforcing long knitting assembly method for manufacturing high-strength concrete piles by the pre-tension method, characterized in that the fixing plate or joint ring. The method of claim 4, wherein When the second fixing member of the step (S14) is a fixed plate to fix the caulked end of the pre-stressed PC steel bar, the nut pre-fitted to the caulked one end of the pre-stressed PC steel bar is the first 2. The method of assembling reinforced steel piles for manufacturing high-strength concrete piles by pretensioning, characterized in that the fastening method is fixed to bolts passing through the through-holes formed in the fixing plate. The method of claim 4, wherein When the second fixing member of the step (S14) is a joint ring, the method of fixing the caulked end of the pre-stressed PC steel bar, the coking process of the pre-stressed PC steel bar is the second fixing member Reinforced long knitting assembly method for manufacturing high-strength concrete piles by the pre-tension method, characterized in that to be fixed to the fixing hole formed in the in-joint ring. The method of claim 4, wherein When the second fixing member of the step (S14) is a joint ring to fix the caulked end of the pre-stressed PC steel bar, the nut is pre-fitted to the caulked end of the pre-stressed PC steel bar. Reinforced long knitting assembly method for manufacturing high-strength concrete piles by the pre-tension method characterized in that the fastening is fixed to the bolt passing through the through-hole formed in the joint ring which is the second fixing member. The method of claim 4, wherein When the second fixing member of the step (S15) is a fixing plate, the method for fixing the caulked one end of the reinforcing bar, the nut previously fitted to the caulked one end of the reinforcing bar is formed through the fixing plate which is the second fixing member Reinforced long knitting assembly method for manufacturing high-strength concrete piles by the pre-tension method characterized in that the fastening is fixed to the bolt passed through the hole. The method of claim 4, wherein When the second fixing member of the step (S15) is a joint ring, the method of fixing the caulked end of the reinforcing bar, the nut is pre-fitted to the caulked end of the reinforcing bar to the joint ring which is the second fixing member. Reinforced long knitting assembly method for manufacturing high-strength concrete piles by the pre-tension method characterized in that the fastening is fixed to the bolt passing through the formed through hole.  The method of claim 4, wherein When the second fixing member of the step (S15) is a joint ring, the method of fixing the caulked one end of the reinforcing bar, the caulking one end of the reinforcing bar in the fixing hole formed in the joint ring is the second fixing member Rebar long knitting assembly method for manufacturing high-strength concrete piles by a pre-tension method, characterized in that the fitting is fixed. The method of claim 1, Reinforced long knitting assembly method for manufacturing high-strength concrete piles by the pre-tension method, characterized in that the third fixing member of the step (S14) and (S15) is a shoe or a joint ring. The method of claim 11, The method of fixing the other end caulked of the pre-stressed PC steel bar using the third fixing member of the step (S14), the other end of the caulking process of the pre-stressed PC steel bar is a third fixing member shoe or joint Reinforced long knitting assembly method for manufacturing high-strength concrete piles by the pre-tension method, characterized in that to be fixed to the fixing hole formed in the ring. The method of claim 11, The method of fixing the other end caulked of the pre-stressed PC steel bar using the third fixing member of the step (S14), the nut is pre-fitted to the other end of the caulking process of the PC steel bar for pre-stressing introduction Reinforced long knitting assembly method for manufacturing high-strength concrete piles by the pre-tension method characterized in that the fastening is fixed to the bolt passing through the through-hole formed in the in-shoe or joint ring.  The method of claim 11,  The method of fixing the other end of the caulking treatment of the reinforcing bar by using the third fixing member of the step (S15), a nut previously fitted to the other end of the caulking treatment of the reinforcing bar is formed on the shoe or joint ring as the third fixing member Reinforced long knitting assembly method for manufacturing high-strength concrete piles by the pre-tension method characterized in that the fastening is fixed to the bolt passing through the through-hole. The method of claim 11, The method of fixing the other end of the caulking treatment of the reinforcing bar using the third fixing member of the step (S15), the other end of the reinforcing bar caulking treatment is inserted into a fixing hole formed in the shoe or joint ring of the third fixing member. Reinforcing long knitting assembly method for manufacturing high-strength concrete piles by the pre-tension method.

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