KR20170048827A

KR20170048827A - Tensioning assembly for making PHC pile and making method using the assembly

Info

Publication number: KR20170048827A
Application number: KR1020150149406A
Authority: KR
Inventors: 허영웅
Original assignee: 주식회사 삼성엠케이
Priority date: 2015-10-27
Filing date: 2015-10-27
Publication date: 2017-05-10
Also published as: KR101767955B1

Abstract

The present invention relates to a tensioning assembly for manufacturing a PHC pile and a manufacturing method for a PHC pile by using the same. The tensioning assembly for manufacturing a PHC pile can reduce fatigue of a worker as components are light and easily assembled. The tensioning assembly for manufacturing a PHC pile has a low possibility of deformation when tensioned. The tensioning assembly for manufacturing a PHC pile comprises: a sludge plate formed in the shape of a disc in contact with a shoe of the PHC pile and having a bolt through hole at a same position as bolt holes of the shoe; a connection member formed in the shape of a short cylinder in which two unit members with a semicircular cross section are connected, wherein the outer surface of the connection member is in contact with the inner surface of a mold and two hanging frames formed at intervals in the longitudinal direction are located on the inner surface; a middle tension plate formed in the shape of a flat ring hung on the hanging frame on one side of the connection member and installed in the connection member to face the sludge plate, wherein the middle tension plate has the bolt through hole at the same position as the bolt holes of the shoe; multiple bolts connected to the bolt hole of the shoe by passing through the bolt through hole of the middle tension plate and the bolt through hole of the sludge plate; a tension plate formed in the shape of the disc installed in the connection plate to be hung on the hanging frame on the other side of the connection member and having a screw hole connected to a shaft of a jack for tensioning a steel wire at the center; and a gap unit forming a gap between the sludge plate and the middle tension plate.

Description

TECHNICAL FIELD [0001] The present invention relates to a tensile assembly for making a PHC file and a method for manufacturing a PHC file using the same.

The present invention relates to a tensile assembly used for manufacturing a PHC file and a method of manufacturing a PHC pile using the same. More specifically, the present invention relates to a tensile assembly used for manufacturing a PHC file, To a tensile assembly for producing a PHC file and a method for manufacturing a PHC file using the same.

When constructing structures such as buildings, it is necessary to reinforce the ground when it is difficult to support the load of the structure. Intrusion of files into the ground is one of the ways to reinforce the ground. Files can be classified into steel pipe files, concrete files, and composite files depending on the material.

The recently used PHC (Pretensioned spun High strength concrete) file has excellent resistance to impact and tensile force because it has a prestress by curing the concrete in the state where the steel wire arranged in the longitudinal direction of the file is stretched. Since the concrete can not support the prestress of the steel wire during the production of such a PHC file, the steel wire must be supported by the manufacturing apparatus including the formwork.

In the 'blocking plate for manufacturing a concrete file and the method for manufacturing a concrete file using the same', registration number 10-1264918 discloses a method of manufacturing a reinforcing plate (a reinforcing plate) And the other end of the tension member is fixed to the tension supporting plate 61 and the tension plate 62 pulled by the tension jack to support the tension member.

However, since the tension supporting plate 61 and the tension plate 62 to which the other end of the tension member is fixed are joined to the tension shaft 63a of the tension jack at the center thereof, a concentrated load is applied at one point, It is necessary to form the member thickly in order to prevent it, so that the member may become heavy and the operation may not be easy. It is also difficult to fix the tension shaft 63a to both the tension supporting plate 61 and the tension plate 62. [

KR 10-1264918 B1

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art as described above and it is an object of the present invention to provide a tensile assembly for making a PHC pile which is less likely to be changed in tension even when the thickness of the component member is not large, And to provide a method of producing a PHC file used.

According to a preferred embodiment of the present invention for solving the above problems, a plurality of steel wires arranged in a space of a mold for manufacturing a PHC file and having one longitudinal end fixed to one longitudinal end of the formwork, And a reinforcing member including a flat ring type shoe having a plurality of bolt holes to which the other ends are joined and which is joined to the other longitudinal end of the reinforcing member and is moved by a jack tensioning jack, A sludge plate having bolt holes at the same position as the bolt holes of the shoe; A coupling member having a short cylindrical shape formed by coupling two unit members having a semicircular cross section and having an outer side in contact with an inner side surface of the mold and two engagement edges formed in an inner side surface at intervals in the longitudinal direction; A middle annular plate having a bolt hole at the same position as the bolt holes of the shoe, the flat annular plate having a ring shape and being disposed in the engaging member so as to face the sludge plate, A plurality of bolts passing through the bolt passing holes of the middle closing plate and the bolt passing holes of the sludge plate and being fastened to the bolt holes of the shoe; A tensile plate having a disc-like shape disposed in the engaging member so as to be caught by the other engaging rim of the engaging member, the engaging member having a threaded hole for engaging with a shaft of the jacking- And spacing means for forming a gap between the sludge plate and the middle tensile plate.

According to another embodiment of the present invention, the spacing means is formed of a bolt having a diameter larger than the diameter of the threaded portion and a length of the shaft portion formed by a thickness longer than the thickness of the long plate and a thickness of the fastening edge, And a bolt through hole of a sludge plate having a diameter smaller than the diameter of the bolt shaft portion and a bolt through hole having a diameter larger than the diameter of the bolt shaft portion. .

According to another embodiment of the present invention, one of the bolt through-holes in the middle closure is open towards the outer edge of the middle closure.

According to another embodiment of the present invention, there is provided a method of manufacturing a PHC file using the above-described tension assembly, comprising the steps of: a) disposing a reinforcing member in a lower mold space of a mold for manufacturing a PHC pile; b) bolting the sludge plate to the shoe of the reinforcing member with a middle tie plate so that a gap is formed between the sludge plate and the intermediate tie plate; c) placing a single unit member of the coupling member in the lower mold, and then attaching the middle clamping plate and the tensioning plate to the one unit member so that the middle clamping plate is caught at one of the clamping rims of the one unit member and the tensile plate is caught at the other clamping rim Placing; d) coupling the other unit member to the intermediate tension plate and the tension plate so that the other unit member of the coupling member forms a cylindrical shape together with the one unit member; e) fixing one end of the reinforcing member to the lower mold; f) completing the assembly of the mold for making the PHC pile after placing the concrete in the lower mold; g) tensioning the steel wire by actuating a jack tension jack to move the tension assembly; And h) curing the concrete in the mold for making the PHC pile and curing the pile. The present invention also provides a tensile assembly for manufacturing a PHC pile and a method for manufacturing a PHC pile using the same.

And b) if one of the bolt through-holes in the intermediate plate is open toward the outer edge of the middle plate, the step b) comprises the steps of: b-1) contacting the sludge plate with the shoe of the reinforcing member and fastening one bolt ; b-2) inserting an intermediate pulling plate so as to have an interval from the sludge plate, and inserting a bolt fastened to the bolt passing hole opened toward the outer edge of the intermediate pulling plate; And b-3) securing the rest of the bolt to the shoe so as to pass through the middle tensile plate and the sludge plate.

The tensile assembly according to the present invention is easy to assemble because a middle plate joined to the shoe of the PHC file and a tensile plate coupled to the shaft of the jack for jacket tension are integrated with each other by the two unit members.

Since the intermediate plate is in contact with the engaging member at its rim and receives the tensile force of the tensile plate, it is possible to uniformly receive the tensile force from the entire middle plate, so that the middle plate is deformed even when the thickness of the intermediate plate is not increased. There is less possibility.

The middle plate with a small thickness is relatively light in weight, which can reduce the fatigue of the operator during work.

Since the sludge plate directly joined to the shoe and the middle tensile plate can be maintained in a fixed state at intervals with each other by the spacing means, the assembly of the reinforcing member including the shoe, the sludge plate and the intermediate pull- .

When one of the plurality of bolt holes provided in the middle tensile plate is formed to open toward the outer edge of the middle plate, the middle plate can be fixed temporarily after fixing the sludge plate to the shoe temporarily. It is possible to fix the sludge plate and the middle tension plate to the shoe easily by aligning the bolt through hole of the middle plate and the bolt through hole position of the middle plate.

1 is a cross-sectional view of a tension assembly according to the present invention.
Figure 2 is a perspective view of the tension assembly.
3 is an explanatory view of a method for manufacturing a PHC file using the tension assembly.
Fig. 4 is an explanatory diagram of a bonding step such as a sludge plate in the case where one of the bolt through-holes in the intermediate folding plate is formed to open toward the outer edge of the intermediate folding plate.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

The present invention relates to a tensile assembly used to make a PHC file and a method for manufacturing a PHC file using the same.

1 is a cross-sectional view of a tension assembly 1 according to the present invention, and FIG. 2 is a perspective view of the tension assembly 1.

In the PHC file, the prestress is introduced by the steel wire that is fixed in the concrete in the state of being pulled. In the PHC file, since the curing of the concrete is not completed and the steel wire can not be fixed, one end of the steel wire is fixed to the die Pull the other end of the steel wire into the jack tensioning jack so that the tensioned state can be maintained.

The tensile assembly 1 for producing the PHC file according to the present invention is connected to the other end of the reinforcing member 2 of the PHC file including the steel wire 2a in the mold 4 for manufacturing the PHC pile, And acts to pull the steel wire 2a by moving together with the operation.

1 and the like, the reinforcing member 2 includes a plurality of steel wires 2a, one end of which is fixed to one end of the mold 4 for manufacturing a PHC file, Shaped shoe 2b having a plurality of bolt holes sh and a reinforcing band 2c surrounded by the other ends of the steel wires 2a and a plurality of steel wires 2a, And may include hoop rods spirally circumferentially disposed. Since the steel wire 2a and the shoe 2b are bonded by a general method, the description thereof will be omitted.

In FIG. 2, only the lower dies 4a of the dies 4 for making PHC files are shown for convenience of explanation.

The tension assembly 1 comprises a sludge plate 10, a coupling member 20, a middle tension plate 30, a plurality of bolts 40, a tension plate 50 and spacing means.

The sludge plate 10 is of a disc shape in contact with the shoe 2b and has a bolt passage hole ph at the same position as the bolt holes sh of the shoe 2b. The sludge plate 10 serves to close the center opening of the shoe 2b so that the concrete does not flow out through the center opening of the ring-shaped shoe 2b when the concrete is centrifugally molded in the mold 4. [

The intermediate plate 30 is of a flat ring shape having a bolt passage hole (ph) at the same position as the bolt holes (sh) of the shoe 2b.

A plurality of bolts 40 are respectively passed through the bolt through holes ph of the intermediate plate 30 and the bolt through holes ph of the sludge plate 10 in order to penetrate the bolt hole sh of the shoe 2b So that the sludge plate 10 can be closely fixed to the shoe 2b. The middle tensile plate 30 can be fixed in spaced relation to the sludge plate 10 by spacing means.

The pulling plate 50 is a circular plate having a threaded hole 51 formed at the center thereof to engage with the shaft 3 of the pulling jack for the steel wire. The pulling plate 50 moves together as the pulling jack for the wire is operated.

The movement of the tension plate 50 is transmitted to the middle tension plate 30 by the cylindrical coupling member 20. In other words, two engagement legs 21 are formed on the inner side surface of the engagement member 20 at intervals in the longitudinal direction, and the middle engagement plate 30 is engaged with the one engagement edge 21 of the engagement member 20, And the tension plate 50 is disposed in the engaging member 20 so as to be caught by the other engaging rim 21 of the engaging member 20 so that the intermediate tension plate 30 is engaged with the tension plate 50).

The tensile force applied to the tensile plate 50 is transmitted to the peripheral portion of the middle tensile plate 30 through the engaging member 20 so that the tensile force applied to the middle tensile plate 30 is evenly applied to the middle tensile plate 30, There is little possibility that the middle plate 30 is deformed during pulling. Since the middle plate with a small thickness is relatively light in weight, there is an advantage that the fatigue of the worker can be reduced.

Since the coupling member 20 is formed by coupling the two unit members U having a semicircular cross section, the middle pulling plate 30 and the tension plate 50 are disposed in the unit member U and the other unit members U The middle tensile plate 30 and the tensile plate 50 are disposed in the engaging member 20 having the engaging member 21 having the engaging rim 21 smaller than the outer diameter of the tension plate 50 It is possible to do. For reference, only one of the two unit members U is shown in Fig. 2 as being placed in the mold 4. Fig.

Since the outer surface of the engaging member 20 contacts the inner surface of the mold 4, the engaging member 20 moves only in the longitudinal direction of the mold 4 without being inclined in the mold 4 during the tensioning operation So that the intermediate clamping plate 30 and the tensioning plate 50 disposed in the coupling member 20 are also moved only in the longitudinal direction of the mold 4. [

Since the middle tension plate 30 has a gap with the sludge plate 10 by the spacing means, the one-side engagement rim 21 of the coupling member 20 is inserted into the gap, It can be caught by the rim 21.

Since the center of the tensile plate 50 is directly subjected to the tensile force by the jack tensioning jack, it is preferable that the thickness of the center portion is made thicker than other portions so as not to be deformed during tensile.

The tensile plate 50 is stably placed in the engaging member 20 by engaging with the engaging rim 21 by forming a step having the same height as the engaging rim 21 of the engaging member 20 at the rim of the tensile plate 50 .

More specifically, the diameter of the shaft portion 41 is formed to be larger than the diameter of the screw portion 42 and the length of the shaft portion 41 is set to be equal to the thickness of the long plate 30, A bolt passage hole ph having a diameter smaller than the diameter of the bolt shaft portion 41 and a bolt passage hole ph having a diameter larger than the diameter of the bolt shaft portion 41, And a bolt passage hole (ph) of the intermediate plate 30 having a plurality of through holes.

The threaded portion 42 of the bolt 40 passes through the bolt through hole ph of the sludge plate 10 while the shaft portion 41 passes through the bolt through hole ph of the sludge plate 10 when the bolt 40 is fastened, The end portion of the shaft portion 41 is pressed and fixed by pressing the sludge plate 10 and the bolt passage hole ph through which the shaft portion 41 of the bolt 40 can pass, Is engaged with one of the engaging rims (21) of the engaging member (20). Accordingly, the interval between the sludge plate 10 and the intermediate folding plate 30 may be greater than the thickness of the one side edge 21 of the engaging member 20.

Hereinafter, a method of manufacturing a PHC file using the tensile assembly 1 for producing a PHC file as described above will be described. Fig. 3 is an explanatory diagram of a method for producing the PHC file.

The method of manufacturing a PHC file includes the steps of: a) disposing a reinforcing member (2) in a space of a lower mold (4a) of a mold (4) for producing a PHC file; b) a sludge plate 10 and a middle tensile plate 30 are joined to the shoe 2b of the reinforcing member 2 by means of bolts 40. A gap is formed between the sludge plate 10 and the middle tensile plate 30, ; c) A unit member U of the coupling member 20 is disposed in the lower die 4a and then the middle plate 30 is engaged with the one side edge 21 of the unit U, Disposing a middle tension plate (30) and a tension plate (50) in the unit member (U) so that the tension plate (50) is caught by the engaging rim (21); d) coupling the other unit U onto the intermediate clamping plate 30 and the tension plate 50 such that the other unit U of the coupling member 20 forms a cylindrical shape together with the unitary member U step; e) fixing one end of the reinforcing member 2 to the lower mold 4a; f) completing the assembly of the mold 4 for making the PHC pile after placing the concrete in the lower mold 4a; g) tensioning the steel wire 2a by actuating a jack tensioning jack to move the tensioning assembly 1; And h) centrifugally molding and curing the concrete in the mold (4) for making the PHC pile.

Each step is described in detail below.

a) arranging the reinforcing member 2 (Fig. 3 (a));

The reinforcing member 2 is arranged in the lower mold 4a of the mold 4 for producing the PHC pile forming the cylindrical space by forming the mold 4 having the semi-circular cross section symmetrically.

Since the lower mold 4a is semicircular in cross section and the upper part of the space is open as described above, the constituent members of the reinforcement member 2 and the tension assembly 1 can be arranged easily.

b) a bonding step such as the sludge plate 10 (Fig. 3 (b));

The bolt 40 is passed through the bolt passage hole ph of the intermediate plate 30 and the bolt passage hole ph of the sludge plate 10 to be fastened to the shoe 2b of the reinforcing member 2, The intermediate shoe 10 and the intermediate shoe 30 are joined to the shoe 2b.

The sludge plate 10 and the intermediate plate 30 are spaced apart from each other by a spacing means. The detailed description of the spacing means has been given above, so a detailed description will be omitted.

(c) a step of arranging the middle plate 30 and the like in the unit member U of the engaging member 20 (Fig. 3 (c));

One unit member U of the two unit members U constituting the coupling member 20 is disposed in the lower die 4a and then the middle plate 30 and the tension member Place the plate (50).

Since the inner diameter of the unit member U is smaller than the outer diameter of the middle plate 30 and the tensile plate 50 but the unit U is formed in a semicircular shape, the middle plate 30 and the tensile plate 50 And can be easily disposed in the unit member U.

The middle tensile plate 30 is attached to the sludge plate 10 and the like but is spaced apart from the sludge plate 10 by the spacing means as described above and thus caught by the one side edge 21 of the unit U.

d) assembling the other unit U of the engaging member 20 (Fig. 3 (d));

The other unit U is joined to the unit U disposed in the lower die 4a to complete the joining member 20. [

Since the engaging member 20 having the circular cross section has the edge portion of the tensile plate 50 and the edge portion of the middle tensile plate 30 connected thereto, the tensile plate 50 can be uniformly transmitted to the middle plate 30 having a middle tensile force.

E) fixing one end of the reinforcing member 2; f) formwork (4) completion of assembly; g) Tension of the steel wire; And h) Concrete centrifugal molding and curing step are not so different from the general PHC pile manufacturing method and therefore will not be described in detail.

One of the bolt passage holes (ph) of the middle tension plate 30 may be formed to open toward the outer edge of the middle tension plate 30. [ In this case, the step of joining the sludge plate 10 or the like includes the steps of: (b-1) bringing the sludge plate 10 into contact with the shoe 2b of the reinforcing member 2 and tightening one bolt 40; b-2) A middle plate (30) is disposed so as to be spaced from the sludge plate (10), and a bolt (30) which is temporarily fastened to a bolt passage hole (ph) opened toward the outer edge of the middle plate (40) to be inserted; And b-3) securing the remaining bolts 40 to the shoe 2b through the middle tensile plate 30 and the sludge plate 10. Fig. 4 is an explanatory view of this case.

When one of the bolt passage holes ph of the middle tensile plate 30 is formed to be opened toward the outer edge of the intermediate plate 30, the sludge plate 10 and the intermediate plate 30 are pressed against the shoe 2b It is not necessary to fasten the bolts 40 while holding them by hand so that the positions of the bolt through holes (ph) of the sludge plate 10 and the middle tensile plate 30 are matched with each other, (10) can be temporarily bonded first, and then the intermediate folding plate (30) can be easily joined. One of the bolt through holes ph of the intermediate plate 30 is opened toward the outer edge so that the bolt 40 fastened to the bolt passage hole ph can be inserted into the bolt 40 The joining operation of the intermediate plate 30 can be performed without being disturbed. The bolt 40 of the sludge plate 10 is inserted into the open bolt passage hole ph of the intermediate plate 30 and the bolt passage hole ph of the sludge plate 10 and the bolt passage It is possible to facilitate the fastening of the rest of the bolts 40 since the positions of the holes ph are matched.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. And thus fall within the scope of the present invention.

1: tension assembly 2: reinforcing member
2a: Steel wire 2b: Shoe
10: sludge plate 20: coupling member
21: Jutting edge 30: Middle facing plate
40: Bolt 41: Shaft
42: threaded portion 50:
51: screw hole
ph: bolt through hole sh: bolt hole
U: unit member

Claims

A plurality of steel wires 2a arranged in the space of the mold 4 for producing a PHC file and having one longitudinal end fixed to one longitudinal end of the formwork and a plurality of longitudinal ends of the steel wires 2a joined to each other, 1. A tension assembly (1) which is joined to the other longitudinal end of a reinforcing member (2) comprising a flat ring-like shoe (2b) having a bolt hole (sh) and moved by a jack tension jack,
A sludge plate 10 having a disk shape contacting the shoe 2b and having a bolt passage hole ph at the same position as the bolt holes sh of the shoe 2b;
(U) having a semicircular cross-section. The outer peripheral surface of the second unit member (U) is in contact with the inner surface of the mold (4) (20) in which the first member (21) is located;
Is of a flat ring type which is engaged with one side edge 21 of the engaging member 20 and is disposed in the engaging member 20 so as to face the sludge plate 10 and which is the same as the bolt holes sh of the shoe 2b A middle plate (30) having a bolt through hole (ph) formed therein;
A plurality of bolts 40 passed through the bolt hole sh of the shoe 2b through the bolt through hole ph of the intermediate tensile plate 30 and the bolt through hole ph of the sludge plate 10;
A screw hole 51 is formed in the center of the coupling member 20 so as to engage with the shaft 3 of the jack tensioning jack at the center thereof so as to be engaged with the other engagement frame 21 of the coupling member 20 A tension plate 50; And
And spacing means for forming a gap between the sludge plate (10) and the intermediate tensile plate (30).

The method according to claim 1,
It is preferable that the diameter of the shaft portion 41 is larger than the diameter of the screw portion 42 and the length of the shaft portion 41 is equal to or more than the thickness of the long plate 30 having the middle length plus the thickness of the fastening flange 21 (Ph) of the sludge plate 10 having a diameter smaller than the diameter of the bolt shaft portion 41 and a bolt passing hole having a diameter larger than the diameter of the bolt shaft portion 41 (PH) of the tensile plate (30).

The method according to claim 1,
Characterized in that one of the bolt through holes (ph) of the middle tension plate (30) is open towards the outer rim of the intermediate tension plate (30).

A method of manufacturing a PHC file using a tensile assembly (1) according to any one of claims 1 to 3,
a) disposing a reinforcing member (2) in a space of a lower mold (4a) of a mold (4) for producing a PHC file;
b) a sludge plate 10 and a middle tensile plate 30 are joined to the shoe 2b of the reinforcing member 2 by means of bolts 40. A gap is formed between the sludge plate 10 and the middle tensile plate 30, ;
c) A unit member U of the coupling member 20 is disposed in the lower die 4a and then the middle plate 30 is engaged with the one side edge 21 of the unit U, Disposing a middle tension plate (30) and a tension plate (50) in the unit member (U) so that the tension plate (50) is caught by the engaging rim (21);
d) coupling the other unit U onto the intermediate clamping plate 30 and the tension plate 50 such that the other unit U of the coupling member 20 forms a cylindrical shape together with the unitary member U step;
e) fixing one end of the reinforcing member 2 to the lower mold 4a;
f) completing the assembly of the mold 4 for making the PHC pile after placing the concrete in the lower mold 4a;
g) tensioning the steel wire 2a by actuating a jack tensioning jack to move the tensioning assembly 1; And
h) centrifugally molding the concrete in the mold (4) for making the PHC file, and then curing the concrete; and a method for manufacturing a PHC pile using the same.

A method of manufacturing a PHC file using a tension assembly (1) according to claim 3,
a) disposing a reinforcing member (2) in a space of a lower mold (4a) of a mold (4) for producing a PHC file;
b-1) bringing the sludge plate 10 into contact with the shoe 2b of the reinforcing member 2 and fastening one bolt 40;
b-2) A middle plate (30) is disposed so as to be spaced from the sludge plate (10), and a bolt (30) which is temporarily fastened to a bolt passage hole (ph) opened toward the outer edge of the middle plate (40) to be inserted;
b-3) fastening the remaining bolts 40 to the shoe 2b through the intermediate tenter 30 and the sludge plate 10;
c) A unit member U of the coupling member 20 is disposed in the lower die 4a and then the middle plate 30 is engaged with the one side edge 21 of the unit U, Disposing a middle tension plate (30) and a tension plate (50) in the unit member (U) so that the tension plate (50) is caught by the engaging rim (21);
d) coupling the other unit U onto the intermediate clamping plate 30 and the tension plate 50 such that the other unit U of the coupling member 20 forms a cylindrical shape together with the unitary member U step;
e) fixing one end of the reinforcing member 2 to the lower mold 4a;
f) completing the assembly of the mold 4 for making the PHC pile after placing the concrete in the lower mold 4a;
g) tensioning the steel wire 2a by actuating a jack tensioning jack to move the tensioning assembly 1; And
h) centrifugally molding the concrete in the mold (4) for making the PHC file, and then curing the concrete; and a method for manufacturing a PHC pile using the same.