KR101803687B1 - A Concrete Pile Mold and Method for Fabricating the Concrete Pile Using the Same - Google Patents

Abstract

The present invention relates to a concrete pile forming apparatus. The concrete pile forming apparatus includes a casing unit, a first molding unit, a second molding unit, and a tension unit. The casing unit has first and second finishing plates on both ends of a porous merging casing unit formed by merging upper and lower casing units in order to form an internal space. The first molding unit has a second molding plate spaced apart from the first molding plate arranged near the first finishing plate and a first connector coupled to the second molding plate to be connected to an end of the first finishing plate and to other ends of the first steel wires passing through the first and second molding plates and has a first space formed between the first and second molding plates. The second molding unit includes a second connector connected to the first connector through a first coupler, a fourth molding plate spaced apart from a third molding plate coupled to the second connector, and a second space formed between the third and fourth molding plates to have a third connector coupled to the fourth molding plate to have an end connected to the second connector while having the other end connected to multiple second steel wires passing through the third and fourth molding plates. The tension unit includes a tension block connected to the third connector through a second coupler, has a tension nut coupled to a tension screw exposed to the outside through guide holes of the second finishing plate while having an end connected to the tension block, and applies a preliminary tension force to the first and second steel wires by using the rotation of the tension nuts.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a concrete pile molding apparatus,

The present invention relates to a concrete pile forming and manufacturing apparatus capable of forming a plurality of concrete piles having the same or different lengths in a single mold and capable of applying a tensile force to a steel wire while reducing frictional resistance.

Generally, a pile or a pile refers to a pillar used for the foundation work of a building (for example, a building or a bridge), and transmits a load to the underground rock when a high-rise building or civil engineering work is performed on the soft ground .

In other words, penetration of the files at regular intervals in the ground or intrusion into the ground adjacent to each other is one of the processes for reinforcing the ground or constructing the water wall, and the files intruded to the ground at a certain depth are classified into a steel pipe file, And synthetic files.

In recent years, PHC (Pretensioned Spun High Strength Concrete) files (hereinafter referred to as concrete files), which are widely used, are produced by curing a mortar to be injected into a mold in a state in which a steel wire arranged in the longitudinal direction of the file is pulled, Can be expressed in a file to be produced and completed, so that the resistance against the external force and the tensile force after the application are excellent.

The mortar injected into the mold in the process of manufacturing such a concrete pile can not support the prestress of the pre-cured steel wire, so that a structure including the mold is required to stretch the steel wire and support the pulled state.

In the process of manufacturing a concrete pile, a reinforcing steel wire is preliminarily laid in the inside, and the steel wire that has been laid is pulled out as a separate tension device by forcibly pulling the steel wire outwardly, and the upper mold casing on the semi- A cavity is formed at the center by rotating the whole mold arranged in a horizontal direction in one direction by the rotational driving force of the rotation driving device, And the concrete pile having the steel wire is manufactured by a rotary centrifugal casting method.

Finally, the pile product is finally completed by curing the concrete pile separated by demolding the mold.

(Patent Document 1) KR10-2014-0021460 A

Patent Document 1 discloses a steel pipe cover having a fixed cover formed at one end of a mold for forming a pile and a steel pipe cover formed at the other end of the mold, A tensile plate connected to the tensile support plate connected to the steel pipe cover and having a shape corresponding to the inner portion of the lower die, and a swash plate abutting on the end fixed to the flange of the lower mold, Discloses a device for manufacturing a composite file having a tensile shaft fixed to a tensile support plate and a tensile plate, and a tensile force connected to the tensile axis to apply a tensile force.

However, conventionally, since only one concrete pile having a predetermined length corresponding to the mold length can be repeatedly manufactured in a single pile in the mold consisting of the lower pile, if the length of the concrete pile to be manufactured is changed to be shorter, It is difficult to quickly cope with a change in the length of the file mold to be manufactured.

Also, since a large number of molds must be prepared in advance according to the length of the concrete pile, the manufacturing cost is increased and the facility maintenance cost is increased.

In addition, since the contact area between the inner surface of the mold and the tension plate is large in the course of pulling out the steel wire outwardly by using the tension plate connected to the plurality of steel wires arranged in the mold, The internal surface is damaged and the service life of the mold is shortened.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a method and apparatus for simultaneously producing a plurality of concrete files with a single pre-tensioned steel wire, The present invention provides a concrete file forming and manufacturing apparatus capable of customizing quickly and easily, and capable of reducing frictional resistance when a steel wire disposed in a single mold is tensioned.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

As a specific means for achieving the above object, a preferred embodiment of the present invention is characterized in that first and second finishing plates are provided at both open ends of a hollow combined casing assembled by merging between an upper casing and a lower casing, A casing portion for forming a casing; And a second molding plate spaced apart from a first molding plate disposed adjacent to the first finishing plate, the first molding plate being connected to the first finishing plate and passing through the first and second molding plates, A first molding part having a first connection body coupled with the second molding plate to be connected to the other end of the one strand, and forming a first space between the first molding plate and the second molding plate; And a fourth molding plate having a second connector connected to the first connector through a first coupler and spaced apart from a third molding plate coupled to the second connector, And a third connecting body connected to the fourth molding plate so as to be connected to the other end of the plurality of second steel wires which are connected to the connecting body and pass through the third and fourth molding plates, A second shaping part forming a second space between the first shaping part and the second shaping part; And a tension member coupled to the tension member through one end of the tension member and connected to the tension screw externally exposed through the guide hole of the second finishing plate, A tensioning unit that applies a preliminary tensile force to the first and second strands by rotation of the tensioning nut; The first and second concrete filaments having the first and second pre-tensioned concrete filaments are rotated in one direction in the first and second spaces by injecting a certain amount of mortar into the first and second spaces, And a molding machine for molding a concrete pile.

 Preferably, the first molding plate, the second molding plate, the third molding plate, and the fourth molding plate are formed such that the outer rim is entirely in contact with the inner surface of the hollow molding type casing, and the first steel wire or the second steel wire is passed And an inner plate integrally formed on one side of the outer plate so as to cover the opening formed at the center of the outer plate and having the central hole penetratingly formed.

Preferably, the first connecting body includes a large-diameter portion formed through an outer edge of a second coupling hole into which a second steel wire connecting member to which the other end of the first steel wire is inserted is inserted, and a ring- Diameter portion having an outer diameter smaller than that of the large-diameter portion so as to form an engaging groove on the outer surface, wherein the second linking member includes a third linking member, Diameter portion having an outer diameter smaller than that of the large diameter portion so as to form a ring-shaped engaging groove on the outer surface of the outer surface of the first coupler, The first connector and the second connector may be connected to each other through the intermediary.

Preferably, the third connecting body includes a large-diameter portion formed through an outer edge of a fourth engaging hole into which a fourth steel wire connecting member to which the other end of the second steel wire is connected is inserted, And a small-diameter portion having an outer diameter smaller than that of the large-diameter portion so as to form an annular engaging groove on an outer surface thereof, wherein the tensile block body includes a block body having a through- And the third coupler and the tension block may be connected to each other via the first coupler.

Preferably, the first coupler includes a pair of first split couplers, the pair of first split couplers include a plurality of first contact plates having outer ends contacted with inner surfaces of the upper and lower casings, The inner end of the first contact plate is integrally fixed to the outer surface at a predetermined interval in the circumferential direction so as to be engaged with the ring-shaped engaging groove formed between the large-diameter portion and the small- And a first semi-circular plate having a pair of hooking protrusions protruding from an inner surface thereof.

Preferably, the second coupler includes a pair of second split couplers, the pair of second split couplers include a plurality of second contact plates having outer ends contacted with inner surfaces of the upper and lower casings, A ring-shaped engaging groove formed between a large-diameter portion and a small-diameter portion provided on the third linking member, and an inner end of the second contact plate is integrally fixed to the outer surface at a predetermined interval in the circumferential direction, And a second semi-circular plate having a pair of hooks protruding from the inner surface so as to be engaged with the protruding jaws formed thereon.

Preferably, an arc-shaped contact surface is formed on the inner surface of the hollow type mixing casing so as to form an arc-shaped contact surface in which the outer surfaces of the concrete piles are in contact with the outer surfaces of the first and second concrete piles, And a projection protruding from the arc-shaped arrangement plate so as to form an arrangement groove for inserting the expansive material into the arc-shaped contact surface.

The present invention as described above has the following effects.

1) The internal space of the hollow molding type casing is divided into a first space formed by the first and second molding plates and a second space formed by the third and fourth molding plates, Since the first and second steel wires can simultaneously produce the first and second concrete files in a single mold by centrifugal casting in a state in which the preliminary tensile force is simultaneously applied by the rotation operation of the tension nut, work productivity can be improved.

2) By making the first spaces formed between the first and second mold plates and the second spaces formed between the third and fourth mold plates equal to or different from each other, a concrete pile Since it is possible to manufacture concrete files flexibly and quickly according to the change in length, it is possible to quickly respond to various demands of the demander to improve the satisfaction, while reducing the number of molds having various lengths, have.

3) By reducing the frictional resistance between the first and second couplers and the hollow type combined casing in the process of rotating the tensile nut of the tensile portion and applying the preliminary tensile force to the outer side of the first and second strands, the damage and wear of the component Can be shortened to extend the service life.

1 is an overall perspective view showing an apparatus for manufacturing a concrete pile according to a preferred embodiment of the present invention.
2 is an overall perspective view of an apparatus for manufacturing a concrete pile according to a preferred embodiment of the present invention, in which an upper casing is separated from a lower casing.
3 is an exploded perspective view showing first and second forming units and a tension unit used in a concrete file forming and manufacturing apparatus according to a preferred embodiment of the present invention.
FIGS. 4A and 4B are assembly views showing first and second forming parts and a tension part used in a concrete file forming and manufacturing apparatus according to a preferred embodiment of the present invention.
5 is a detailed view of a casing part used in a concrete file forming apparatus according to a preferred embodiment of the present invention.
6 is a cross-sectional view of a concrete file forming apparatus according to a preferred embodiment of the present invention.
FIG. 7 is a construction diagram of a concrete pile manufactured in a concrete file forming apparatus according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may obscure the subject matter of the present invention.

The same reference numerals are used for portions having similar functions and functions throughout the drawings.

In addition, throughout the specification, when a part is referred to as being "connected" to another part, it includes not only a case where it is directly connected, but also a case where it is indirectly connected with another part in between . Also, to include an element does not exclude other elements unless specifically stated otherwise, but may also include other elements.

As shown in FIGS. 1 to 6, the concrete pile forming and manufacturing apparatus 100 according to a preferred embodiment of the present invention can be manufactured by simultaneously molding at least two concrete piles having a pre-tensioned steel wire in a single mold The first forming unit 120, the second forming unit 130, and the pulling unit 140, as shown in FIG.

1, 2 and 6, the casing unit 110 includes a lower casing 111 on a substantially semicircular cross section having a first coupling flange 111a in the longitudinal direction on both left and right side edges opened downward, And a second coupling flange 112a corresponding to the first coupling flange 111a, and an upper casing 112 having a substantially semicircular cross section opened to the lower side by longitudinally arranging the second coupling flange 112a on both left and right side edges.

The upper and lower casings 111 and 112 are formed by a plurality of one-touch bolts 113 fastened to the first and second coupling flanges, which are vertically stacked on top of each other, Thereby forming a hollow composite casing 110a having a predetermined length.

Flanges 111b and 112b provided at both ends of the upper and lower casings are provided at one end and both ends of the hollow shafted casing 110a and first and second closing plates 114 and 115 assembled by a plurality of fastening members, The open ends of the hollow combined casing 110a provided by the upper and lower assemblies of the upper and lower casings 111 and 112 are closed by the first and second closing plates.

A mortar 114a is inserted through the center of a first finishing plate 114 assembled at one end of the hollow coupling casing 110a so as to inject mortar into the inner space of the hollow coupling casing The end of the tension screw 146 provided in the tension unit 140 is drawn out to the outside in the center of the second finishing plate 115 assembled to the other end of the hollow combined casing 110a, And has a hole 115a.

The first finishing plate 114 may have a first coupling hole 114b formed in the first finishing plate 114 so that a first wire connecting member 118 connected to one end of the first steel wire P1 is coupled to the first finishing plate 114.

In order to manufacture a concrete pile having a substantially rectangular cross-section, both side surfaces of the upper and lower casings, to which the first and second coupling flanges are joined together, are formed in a straight line, and the upper and lower surfaces are convex But the present invention is not limited thereto. The upper and lower casings on the semicircular section may be formed in a circular cross-section by vertically combining the upper and lower casings.

The hollow reinforced casing 110a has a first reinforcing rib 116a integrally provided on the outer surfaces of the upper and lower casings in parallel to the first and second coupling flanges 111a and 112a, And a second reinforcing rib 116b provided on the outer surface of the upper and lower casings so as to contact with the first reinforcing ribs in a circumferential direction along the outer circumferential surface of the joint flange substantially at right angles to sufficiently withstand the external force generated during centrifugal casting .

A plurality of contact tires 117 are provided on the outer surface of the hollow shafted casing 110a and are in contact with driving rollers driven in one direction by a rotational driving force of a rotation driving device (not shown) 117) includes a plate body (119b) extending from an inner surface of a ring body (117a) whose outer circumferential surface is in contact with the driving roller and in contact with an outer surface of the hollow cylindrical casing (110a), and the upper and lower casings And a pair of division members which are assembled and assembled by being divided into upper and lower portions with reference to an interfacing surface.

The plate body 119b is provided with a cut-out portion at a joint portion between the first and second engagement flanges and at a position corresponding to the first reinforcement rib, respectively, so that the interference between the hollow joint- And is integrally provided on the outer surface of the hollow compound casing.

As shown in FIGS. 3 to 6, the first forming unit 120 includes a first molding plate 120 disposed adjacent to a first finishing plate 114 provided at one end of the hollow molding casing 110a, And a second molding plate 122 including the first molding plate 121 and spaced apart from the first molding plate 121 by a predetermined distance corresponding to the length of the first concrete pile to be manufactured.

The first and second molding plates 121 and 122 are preferably formed of a plate material disposed perpendicularly to the inner space of the hollow molding casing 110a so that the outer edges of the first and second molding plates 121 and 122 uniformly contact the inner surfaces of the upper and lower casings.

And a first connecting body 123 integrally coupled to one side surface of the second forming plate 122. The first connecting body 123 has one end connected to the first finishing plate 114, And connected to the other ends of the plurality of first steel wires P1 passing through the first and second molding plates.

A first molding plate 121 disposed adjacent to the first finishing plate 114 and a second molding plate 122 integrally coupled to the first connecting body 123 are formed in a hollow synthetic resin casing Outer side plates 121a and 122a formed on the inner surface of the outer side plates 110a and 110a such that the outer side edges of the inner side surfaces of the outer side plates uniformly contact with each other and through the plurality of through holes 121b and 122b to allow the first steel wire P1 to pass therethrough, And inner plates 121c and 122c integrally formed on one side of the outer plate so as to cover the opening formed in the opening and having the central holes 121d and 122d formed therethrough.

The outer edges of the first and second molding plates 121 and 122 may be provided with sealing members to prevent the molten metal from leaking outward during the centrifugal casting of the mortar injected into the first space formed therebetween.

One end of the first connecting member 123 is connected to the first wire connecting member 118 coupled to the first engaging hole 114b of the first finishing plate 114, And is coupled to the second shaping plate 122 to be connected to the other end of the first steel line P1.

The first link member 123 includes a second engaging hole 123b into which a second steel wire connecting member 119 to which the other end of the first steel wire P1 is connected is inserted into the large diameter portion 123a And a small diameter portion 123c having an outer diameter smaller than that of the large diameter portion so as to form a ring-shaped catching groove to which a first coupler 140a described below is engaged.

At this time, the second shaping plate 122 is provided with another second coupling hole formed on the large-diameter portion of the first coupling body through the lower outer edge, and a coupling member fastened through the corresponding through hole 122b, And is integrally coupled to one side of the first connecting body 123 facing the first forming plate 121.

Accordingly, the first molding plate and the second molding plate, whose outer rim is entirely in contact with the inner surface of the upper and lower casings, are spaced apart from each other by a predetermined distance in accordance with the formation length of the first concrete pile to be manufactured And a first space for molding the first concrete pile is formed during the centrifugal casting of the mortar injected between them.

As shown in FIGS. 3 to 6, the second forming unit 130 includes a first forming unit 130 and a second forming unit 130, which are connected to each other through the first coupler 123 of the first forming unit 120 and the first coupler 140a. And a fourth shaping plate 132 having two connecting bodies 133 and spaced apart from the third shaping plate 131 to be coupled to the second connecting body 133.

One end of the second connecting member 133 is coupled to the fourth forming plate 132 so as to be connected to the second ends of the plurality of second steel wires P2 passing through the third and fourth forming plates 131 and 132 The third molding plate 131 and the fourth molding plate 132, which are spaced apart from each other by a predetermined distance in the inner space of the hollow molding type casing, To form a second space for forming a second concrete pile.

Like the first and second molding plates, the third and fourth molding plates 131 and 132 are disposed vertically to the inner space of the hollow molding casing 110a so that the outer rims of the upper and lower molding plates are uniformly in contact with the inner frame It is preferable that it is made of a plate material.

The third connection plate 133 is coupled to one side of the third connection plate 133 and the third connection plate 134 is coupled to one side of the third connection plate 133, Like the first and second molding plates, the fourth molding plate 132 is formed with a plurality of through holes (not shown) so that the outer rim of the fourth molding plate 132 is uniformly in contact with the inner surface of the hollow molding casing 110a, 132b which are integrally provided on one side surface of the outer plate so as to cover the openings formed at the center of the outer plate and penetrate the central holes 131d, And formed inner plates 131c and 132c.

The outer rim of the third and fourth plates 131 and 132 may be provided with sealing members to prevent the molten metal from leaking outward during the centrifugal casting of the mortar injected into the second space formed therebetween.

The second link member 133 includes a third linking hole 133b into which a third strand connecting member 118a to which one end of the second strand P2 is connected is inserted into the large diameter portion 133a And a small diameter portion 133c having an outer diameter relatively smaller than that of the large diameter portion so as to form a ring-shaped engaging groove on the outer surface.

The fourth connecting member 134 is connected to the fourth connecting member 119a to which the other ends of the second steel wire P2 passing through the third and fourth forming plates 131 and 132 are connected, A large diameter portion 134a formed through the outer edge of the fourth engaging hole 134b and a ring-shaped engaging groove in which the second coupler 140b, which will be described later, are engaged, And a small diameter portion 134c having a small outer diameter.

At this time, the third shaping plate 131 is provided with a third engaging hole formed on the large-diameter portion of the second connecting body through the lower outer edge, and a fastening member fastened through the corresponding through hole 133b. Is integrally coupled to one side of a second connecting body (133) facing the fourth forming plate (132), and the fourth forming plate (132) is connected to the lower outer edge of the third connecting body Is integrally coupled to one side of the third linking member 134 facing the third forming plate 131 by the other third linking hole formed and the fastening member fastened through the corresponding through hole 134b .

Accordingly, in the inner space of the hollow shafted casing, the third and fourth plates, the outer edges of which are entirely in contact with the inner surfaces of the upper and lower casings, are spaced at regular intervals in accordance with the length of the second concrete pile to be manufactured And a second space for molding the second concrete pile is formed during the centrifugal casting of the mortar injected between them.

The first and second spaces formed between the first and second mold plates in the hollow molding casing and the second spaces formed between the third and fourth mold plates may have the same length as the first and second concrete files, The first and second concrete piles may be formed to have the same length so that they can be simultaneously formed and manufactured. However, the present invention is not limited thereto.

The first coupler 140a includes a first connector 123 connected to the other end of the first wire P1 arranged in the first space and a second connector 123 connected to the second wire P2 arranged in the second space. The first coupler 140a is disposed between the inner surface of the upper and lower casings and the outer surface of the first and second couplers, The first split coupler includes a plurality of first contact plates (141a, 142a, 142a, 142a, 142a, 142a, 142a, 142a, And the inner ends of the plurality of first contact plates are integrally fixed to the outer surface at a predetermined interval in the circumferential direction, and the annular ring formed between the large-diameter portion and the small- (141b, 142b) protruding from a pair of latching protrusions (141c, 142c) on the inner surface so as to be engaged with the latching grooves, It can be included.

Accordingly, the first contact plate of the upper and lower first split couplers constituting the first coupler is partially in contact with the inner surface of the hollow combined casing in which the upper and lower casings are assembled, When the first and second connecting members move in the pulling direction in the process of applying the pulling force to the outside of the two stranded wires, the frictional resistance with the inner surface of the hollow molding type casing can be reduced to prevent breakage of the component parts, The work for imparting the preliminary tensile force to the first and second steel wires can be easily performed without frictional resistance.

As shown in FIGS. 3 to 6, the tension unit 140 includes a tension member (not shown) connected through a third coupler 134 provided in the second forming unit and a second coupler 140b And a tensioning screw 146 having a predetermined length and having one end connected to the tension block body 145 and exposed to the outside through the lead-out hole 115a of the second finishing plate 115, And a tension nut 147 screwed to a male screw portion formed on the outer surface of the other end of the tension screw.

The tension block body 145 is formed on an outer surface of a block body 145a formed with a screw hole through the center of the body so that one end of the tension screw is screwed, 145b.

The second coupler 140b connects the third link member 134 connected to the other end of the second steel wire P2 arranged in the second space and the tension block member 145 coupled to the tension screw The second coupler 140b is disposed between the inner surface of the upper and lower casings and the outer surface of the third coupling member and the tension member in the same manner as the first coupler, And the second split coupler includes a plurality of second contact plates (143a, 144a) whose outer ends contact the inner surfaces of the upper and lower casings (111, 112) The inner end of the second contact plates are integrally fixed to the outer surface at a predetermined interval in the circumferential direction, and the ring-shaped engaging groove formed between the large-diameter portion and the small- (Not shown) formed on the inner surface so as to be engaged with the projection 145b Rimteok it may include a second reflection disc (143b, 144b) is formed (143c, 144c) of the extrusion.

Accordingly, the tension nut 147, which is screwed to the tension screw 146 exposed through the through hole 115a of the second finishing plate 115 and is in contact with the second finishing plate, An external force is generated in a direction in which the tension screw screwed with the tension nut is pulled outward in proportion to the amount of rotation of the tension nut so that the external force is generated by the external force by the rotation operation of the tension nut, The third connecting member connected to the second connecting member through the second coupler is pulled outward to give a preliminary tensile force to the plurality of second steel wires P2 connected between the third connecting member and the second connecting member.

At the same time, since the first linking member connected to the second linking member 133 via the first coupler is pulled outward, the first linking member and the first linking line connected to the first finishing flange also have a preliminary tensile force Can be given.

At this time, the second contact plate of the upper and lower second split couplers constituting the second coupler is partially in contact with the inner surface of the hollow composite casing, so that the first and second steel wires are moved outward The frictional resistance between the third connecting body and the tensile block body with respect to the inner surface of the hollow sifting casing can be reduced when the third connecting body and the tensile block body move in the pulling direction, It is possible to easily perform the operation of applying the preliminary tensile force to the 1,2 steel wire without friction resistance.

In addition, in the state where a tensile force is applied by applying an external force to the first and second steel wires arranged in the first and second spaces by the tensile nut of the tensile portion, And then the hollow composite casing is rotated at a high speed in one direction by the rotational driving force of the rotary drive device to form a cavity at the center and the first and second concrete having first and second pre- Files can be simultaneously produced by a rotary centrifugal casting method.

At this time, by forming the first and second plates in the same or different intervals, the first and second concrete piles are formed by centrifugal casting in the first and second spaces, respectively They may be manufactured by making the lengths equal to each other or may be made different from each other.

On the other hand, on the inner surface of the hollow coupling casing 110a, arc-shaped contact surfaces 10 are formed on the outer surfaces of the first and second concrete piles, which are centrifugally cast in the first and second spaces, Shaped positioning plate 101 so as to form an arrangement groove 20 in which an exponent 30 with which the outer surface of another concrete pile is in contact is disposed on the arc- As shown in Fig.

The first, second, third, and fourth forming plates 121, 122, 131, 132 having the outer edges thereof entirely contacted with the outer surface of the hollow coupling casing 110a are provided with a notch N at positions corresponding to the arcuate arrangement plate and the protrusions It is preferable that the arc-shaped arrangement plate and the protruding portion are positioned and contacted with the notch portion.

 Accordingly, when the first and second concrete piles manufactured in the hollow type casing are vertically inserted into the ground at a certain depth and the first and second concrete piles are continuously installed in the width direction, The first and second concrete piles C1 and C2 which are centrifugally cast by the arc-shaped arrangement plate 101 and the protrusions 102 provided on the inner surface of the hollow composite casing are disposed on the outer surfaces of the first and second concrete piles C1 and C2, Since the arc-shaped contact surface 10 having the groove 20 can be continuously formed in the longitudinal direction, the arc-shaped contact surface formed by being recessed on the outer surface of the first and second concrete piles is in contact with the arc- And an index material 30 is inserted and disposed in the arrangement groove 20 of the arc-shaped contact surface 10 in contact therewith to improve the order performance of the interface between the concrete files.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

110: casing portion
110a: Hollow type combined casing
111, 112: upper and lower casings
114, 115: first and second finishing plates
120: first forming part
121, 122:
123: first connector
130: first forming part
133: second connector
134: third connecting body
140:
140a, 140b: first and second couplers
141, 142: first split coupler
143,144: Second split coupler
145: Tension block body
146: tension screw
147: tension nut

Claims (7)

delete A casing unit having first and second finishing plates at both open ends of a hollow sourcing casing assembled by merging the upper casing and the lower casing to form an inner space;
And a second molding plate spaced apart from a first molding plate disposed adjacent to the first finishing plate, the first molding plate being connected to the first finishing plate and passing through the first and second molding plates, A first molding part having a first connection body coupled with the second molding plate to be connected to the other end of the one strand, and forming a first space between the first molding plate and the second molding plate;
And a fourth molding plate having a second connector connected to the first connector through a first coupler and spaced apart from a third molding plate coupled to the second connector, And a third connecting body connected to the fourth molding plate so as to be connected to the other end of the plurality of second steel wires which are connected to the connecting body and pass through the third and fourth molding plates, A second shaping part forming a second space between the first shaping part and the second shaping part; And
And a tension nut coupled to the tension screw externally exposed through the guide hole of the second finishing plate, the tension nut having one end connected to the tensile block body, A tensile portion that applies a preliminary tensile force to the first and second strands by rotation of the tensile nut; Including
The first and second concrete filaments having the first and second pre-tensioned concrete filaments are rotated at the same time in the first and second spaces by rotating the hollow filament type casing in which a certain amount of mortar is injected into the first space and the second space, and,
Wherein the first molding plate, the second molding plate, the third molding plate, and the fourth molding plate are formed such that the outer rim is entirely in contact with the inner surface of the hollow molding type casing, And an inner plate integrally formed on one side surface of the outer plate so as to cover an opening formed in the center of the outer plate and passing through the central hole, Forming device. A casing unit having first and second finishing plates at both open ends of a hollow sourcing casing assembled by merging the upper casing and the lower casing to form an inner space;
And a second molding plate spaced apart from a first molding plate disposed adjacent to the first finishing plate, the first molding plate being connected to the first finishing plate and passing through the first and second molding plates, A first molding part having a first connection body coupled with the second molding plate to be connected to the other end of the one strand, and forming a first space between the first molding plate and the second molding plate;
And a fourth molding plate having a second connector connected to the first connector through a first coupler and spaced apart from a third molding plate coupled to the second connector, And a third connecting body connected to the fourth molding plate so as to be connected to the other end of the plurality of second steel wires which are connected to the connecting body and pass through the third and fourth molding plates, A second shaping part forming a second space between the first shaping part and the second shaping part; And
And a tension nut coupled to the tension screw externally exposed through the guide hole of the second finishing plate, the tension nut having one end connected to the tensile block body, A tensile portion that applies a preliminary tensile force to the first and second strands by rotation of the tensile nut; Including
The first and second concrete filaments having the first and second pre-tensioned concrete filaments are rotated at the same time in the first and second spaces by rotating the hollow filament type casing in which a certain amount of mortar is injected into the first space and the second space, and,
Wherein the first connecting body includes a large diameter portion formed through an outer edge of a second engaging hole into which a second steel wire connecting member to which the other end of the first steel wire is inserted is inserted and a ring- And a small diameter portion having an outer diameter relatively smaller than that of the large diameter portion so as to be formed on the outer surface,
Wherein the second connecting body includes a large diameter portion formed on an outer edge of a third coupling hole into which a third wire connecting member to which one end of the second steel wire is connected is inserted, Wherein the first connector and the second connector are connected to each other via the first coupler, wherein the first connector and the second connector are connected to each other via the first coupler. Device. A casing unit having first and second finishing plates at both open ends of a hollow sourcing casing assembled by merging the upper casing and the lower casing to form an inner space;
And a second molding plate spaced apart from a first molding plate disposed adjacent to the first finishing plate, the first molding plate being connected to the first finishing plate and passing through the first and second molding plates, A first molding part having a first connection body coupled with the second molding plate to be connected to the other end of the one strand, and forming a first space between the first molding plate and the second molding plate;
And a fourth molding plate having a second connector connected to the first connector through a first coupler and spaced apart from a third molding plate coupled to the second connector, And a third connecting body connected to the fourth molding plate so as to be connected to the other end of the plurality of second steel wires which are connected to the connecting body and pass through the third and fourth molding plates, A second shaping part forming a second space between the first shaping part and the second shaping part; And
And a tension nut coupled to the tension screw externally exposed through the guide hole of the second finishing plate, the tension nut having one end connected to the tensile block body, A tensile portion that applies a preliminary tensile force to the first and second strands by rotation of the tensile nut; Including
The first and second concrete filaments having the first and second pre-tensioned concrete filaments are rotated at the same time in the first and second spaces by rotating the hollow filament type casing in which a certain amount of mortar is injected into the first space and the second space, and,
Wherein the third connecting body includes a large diameter portion formed through an outer edge of a fourth engaging hole into which a fourth steel wire connecting member to which the other end of the second steel wire is connected is inserted and a ring- And a small-diameter portion having an outer diameter relatively smaller than that of the large-diameter portion so as to form a groove on an outer surface,
Wherein the tension block includes a projection protruding from an outer surface of a block body having a through hole formed at the center of the body so that one end of the tension screw is threaded, Wherein the third connecting member and the tension block are connected to each other through the intermediate member. A casing unit having first and second finishing plates at both open ends of a hollow sourcing casing assembled by merging the upper casing and the lower casing to form an inner space;
And a second molding plate spaced apart from a first molding plate disposed adjacent to the first finishing plate, the first molding plate being connected to the first finishing plate and passing through the first and second molding plates, A first molding part having a first connection body coupled with the second molding plate to be connected to the other end of the one strand, and forming a first space between the first molding plate and the second molding plate;
And a fourth molding plate having a second connector connected to the first connector through a first coupler and spaced apart from a third molding plate coupled to the second connector, And a third connecting body connected to the fourth molding plate so as to be connected to the other end of the plurality of second steel wires which are connected to the connecting body and pass through the third and fourth molding plates, A second shaping part forming a second space between the first shaping part and the second shaping part; And
And a tension nut coupled to the tension screw externally exposed through the guide hole of the second finishing plate, the tension nut having one end connected to the tensile block body, A tensile portion that applies a preliminary tensile force to the first and second strands by rotation of the tensile nut; Including
The first and second concrete filaments having the first and second pre-tensioned concrete filaments are rotated at the same time in the first and second spaces by rotating the hollow filament type casing in which a certain amount of mortar is injected into the first space and the second space, and,
Wherein the first coupler includes a pair of first split couplers, the pair of first split couplers includes a plurality of first contact plates having outer ends contacted with inner surfaces of the upper and lower casings, Wherein the inner end of the plate is integrally fixed to the outer surface at a predetermined interval in the circumferential direction, and the inner end of the plate is engaged with the annular recessed groove formed between the large- And a first semi-circular plate formed by protruding a pair of engaging jaws. A casing unit having first and second finishing plates at both open ends of a hollow sourcing casing assembled by merging the upper casing and the lower casing to form an inner space;
And a second molding plate spaced apart from a first molding plate disposed adjacent to the first finishing plate, the first molding plate being connected to the first finishing plate and passing through the first and second molding plates, A first molding part having a first connection body coupled with the second molding plate to be connected to the other end of the one strand, and forming a first space between the first molding plate and the second molding plate;
And a fourth molding plate having a second connector connected to the first connector through a first coupler and spaced apart from a third molding plate coupled to the second connector, And a third connecting body connected to the fourth molding plate so as to be connected to the other end of the plurality of second steel wires which are connected to the connecting body and pass through the third and fourth molding plates, A second shaping part forming a second space between the first shaping part and the second shaping part; And
And a tension nut coupled to the tension screw externally exposed through the guide hole of the second finishing plate, the tension nut having one end connected to the tensile block body, A tensile portion that applies a preliminary tensile force to the first and second strands by rotation of the tensile nut; Including
The first and second concrete filaments having the first and second pre-tensioned concrete filaments are rotated at the same time in the first and second spaces by rotating the hollow filament type casing in which a certain amount of mortar is injected into the first space and the second space, and,
Wherein the second coupler includes a pair of second split couplers, the pair of second split couplers includes a plurality of second contact plates having outer ends contacted with inner surfaces of the upper and lower casings, Wherein the inner end of the plate is integrally fixed to the outer surface at a predetermined interval in the circumferential direction, and a ring-shaped engaging groove formed between the large-diameter portion and the small-diameter portion of the third linking member, And a second semi-circular plate having a pair of engaging protrusions formed on an inner surface thereof so as to be engaged with the second semi-circular plate. A casing unit having first and second finishing plates at both open ends of a hollow sourcing casing assembled by merging the upper casing and the lower casing to form an inner space;
And a second molding plate spaced apart from a first molding plate disposed adjacent to the first finishing plate, the first molding plate being connected to the first finishing plate and passing through the first and second molding plates, A first molding part having a first connection body coupled with the second molding plate to be connected to the other end of the one strand, and forming a first space between the first molding plate and the second molding plate;
And a fourth molding plate having a second connector connected to the first connector through a first coupler and spaced apart from a third molding plate coupled to the second connector, And a third connecting body connected to the fourth molding plate so as to be connected to the other end of the plurality of second steel wires which are connected to the connecting body and pass through the third and fourth molding plates, A second shaping part forming a second space between the first shaping part and the second shaping part; And
And a tension nut coupled to the tension screw externally exposed through the guide hole of the second finishing plate, the tension nut having one end connected to the tensile block body, A tensile portion that applies a preliminary tensile force to the first and second strands by rotation of the tensile nut; Including
The first and second concrete filaments having the first and second pre-tensioned concrete filaments are rotated at the same time in the first and second spaces by rotating the hollow filament type casing in which a certain amount of mortar is injected into the first space and the second space, and,
And an arc-shaped arrangement plate is formed on the inner surface of the hollow type mixing casing so as to form arc-shaped contact surfaces in which the outer surfaces of the concrete piles are in contact with the outer surfaces of the first and second concrete piles, And a protrusion formed on the arc-shaped arrangement plate so as to form an arrangement groove in which the expansive material is inserted and disposed in the arc-shaped contact surface.

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