KR102598277B1 - Psc member using end concrete block as tendon fixing apparatus and fabrication method therefor - Google Patents

Abstract

PSC girders are manufactured using the pretension method in the field, but by manufacturing the pretension anchorage block, which is used as the anchorage block for the tension member, integrally with the body of the PSC girder, it is possible to effectively resist end tension cracks and A PSC girder and its manufacturing method using an integrated pretension anchoring block are disclosed, which enable the production of PSC girders that are simple, quick, and durable without the need for anchorage block dismantling work.

Description

PSC member and manufacturing method using integrated pretension anchoring block {PSC MEMBER USING END CONCRETE BLOCK AS TENDON FIXING APPARATUS AND FABRICATION METHOD THEREFOR}

The present invention relates to a PSC girder using an integrated anchorage block for pretension and a method of manufacturing the same. More specifically, the PSC girder is manufactured using the pretension method in the field, and the pretension anchor block used as the anchor block for the tension member is manufactured integrally with the body of the PSC girder, so that it can effectively resist end tension cracking. It relates to a PSC member and its manufacturing method using an integrated pretension anchorage block that allows for rapid production of PSC members without the need for pretension anchorage block disassembly.

Figure 1a shows an example of structure construction using a conventional pretension method.

In other words, in the long-line method, external reaction bars are installed in the form of vertical plates on the upper surfaces of both ends of the production table at the site or factory, and a number of forms for concrete members are placed on the upper surface of the production table so that they are spaced apart from each other, and both ends of the tension members are external. It can be seen that the tension member is installed through the formwork for the concrete member while extending to the reaction arm.

Accordingly, the tension member is first tensioned and then settled on the external reaction table, and then concrete is poured and cured inside the formwork for the concrete member,

The tension member extending between the formwork for the concrete member and the formwork for the concrete member is cut to introduce the necessary compressive stress (prestress) into the cured concrete by the relaxed tendon member.

From the final production table, it can be seen that the external reaction table and the formwork for the concrete member were demolded to enable the production of a concrete member with compressive stress introduced.

Using this long-line pretension method has the advantage of enabling batch production by introducing compressive stress into multiple concrete members, but the cost of installing the production table and dismantling the external reaction table increases, so the post-tension method is used. There was a problem that the economic feasibility was somewhat lowered compared to the concrete member due to .

Figure 1b shows an example of another conventional pretension production table.

A bottom portion (7) that has a flat upper surface and is placed on the ground and on which the formwork is set;

A longitudinal reaction force (6) extending in the longitudinal direction, arranged in parallel at intervals in the transverse direction, and coupled to the bottom (7).

First and second hinge connectors (1a, 1b) that are respectively coupled to both ends of the longitudinal reaction arm (6) and are hinged to block transmission of bending moment and transmit only axial force to the longitudinal reaction arm (6);

An anchoring-side transverse support (5) coupled to the first hinge connector (1a), fixed to the bottom (7), and allowing one end of the tendon (8) to penetrate and be fixed;

A telescopic jack (3) arranged in close contact with the second hinge connector (1b);

The tension side transverse support ( 2) It consists of:

The reaction force generated in the process of tensioning the tension member (8) acts as an axial force on the longitudinal reaction band (6) at its central axis,

By using the first and second hinge connectors (1a, 1b), the rigidity of the longitudinal reaction arm (6) must be increased or the cross section must be increased to prevent bending moment induction or buckling of the conventional longitudinal reaction arm. By solving the problem, it was possible to reduce the manufacturing cost of the pretension beam.

Accordingly, after the tension force is introduced into the tension member (8), a form (not shown) is installed on the bottom part (7) in the gap between the longitudinal reaction bars (6), and concrete is poured so that the tension member (8) is buried. After the concrete is cured, the fixed state at both ends of the tendon member 8 is released, and the tension previously introduced in the tendon member 8 is transferred to the concrete portion, thereby introducing compressive stress (prestress) into the concrete beam.

Accordingly, compared to Figure 1a, it can be seen that a production table can be used to manufacture a single concrete member rather than manufacturing multiple concrete members in batches. However, in this case, the compressive stress introduced by the tendon material is installed at both ends. It can be seen that it is necessary to prevent distortion and buckling due to stress concentration in the longitudinal reaction arm (6).

Figure 1c shows an example of a manufacturing method of a pretension member using a conventional tension portion.

(a) installing a plurality of internal partition means made of precast at predetermined intervals in the longitudinal direction (longitudinal direction) at the inner opening of the formwork 40;

(b) installing tension parts 70 on both ends of the formwork 40;

(c) an internal reaction band (30) that resists with a reaction force when the tension force of the tension member (130) is introduced between the tension member (70) and the internal partition wall means facing each other and between the internal partition wall means (50 and 50) adjacent to each other. ) arranging;

(d) inserting the tension member 20 into the formwork 40 and then introducing tension force to anchor both ends to the tension portion 70;

(e) Concrete is poured into the form 40, demolding the form 40 after curing, unfastening the tension member 20 and removing the tension part 70 to introduce compressive stress into the structure 10. It can be seen that the PSC structure 10 is manufactured by including the step.

Accordingly, the tension portion 70 is supported by the formwork 40 and is removed separately after compressive stress is introduced by the tension member 20, so that the tension portion 70, which is a heavy object, is lifted, installed, and The removal process through dismantling had no choice but to be repeated.

Republic of Korea Patent Publication No. 10-2018-0023546 (Title of the invention: Manufacturing table for manufacturing pre-tensioned prestressed concrete beams and method for manufacturing prestressed concrete beams using the same, Publication date: March 7, 2018 Day) Republic of Korea Patent No. 10-2113430 (Title of invention: Manufacturing method of pretension PSC structure using internal partition means and internal reaction force, Publication date: May 20, 2020)

Accordingly, the present invention manufactures the PSC member using tension material in the field without having a separate production table, but manufactures the anchoring block for pretension integrally with the PSC body, so there is no need to remove the anchoring block for pretension separately. The technical problem to be solved is to provide a PSC member and a manufacturing method using an integrated pretension anchoring block that can prevent the PSC from being installed.

In addition, the present invention provides an integrated pretension anchoring block that can control end tensile cracks at the area in contact with the PSC body by optimizing the size of the pretension anchoring block, enabling more efficient production of PSC members by securing durability. The technical problem to be solved is the provision of used PSC members and their manufacturing methods.

The PSC member and its manufacturing method using the integrated pretension anchoring block of the present invention to achieve the above problem are tensioned between the integrated pretension anchorage blocks made of precast supported so as to be spaced apart from each other, thereby forming the integrated pretension anchorage block. Tension material anchored in anchorage block; And concrete is poured and cured so that the tension material is embedded between the integrated pretension anchorage blocks to which the tendon material is anchored, and the tension material is structurally integrated with the integrated pretension anchorage block, and then the anchorage state of the tendon material is released to introduce compressive stress. It includes a formed PSC body; wherein the coupling surface of the integrated pretension anchoring block in contact with the PSC body is orthogonal to the end tension crack acting by using the bottom surfaces of both ends of the integrated pretension anchorage block as simple fulcrums (crossing) ) so that it can be controlled.

According to the present invention, the integrated pretension anchoring block not only serves as a anchoring block for the tension member, but is used as a part of the PSC member, so it is more economical and rapid to provide a PSC member using the integrated pretension anchoring block and a method of manufacturing the same. It becomes possible.

In addition, according to the present invention, the efficiency and economic efficiency of the production equipment can be secured by manufacturing the integrated pretension anchorage block integrally with the PSC body without removing the anchorage block for the integrated pretension, which enables more economical production of PSC members. It becomes possible to provide PSC members and manufacturing methods using blocks.

In addition, according to the present invention, as the size and weight of the integrated pretension anchoring block are optimized and manufactured, end tension cracks may occur at the cold joint area formed when the PSC body is joined, resulting in extension lines of both abdomens and end tension cracks. By making them orthogonal to each other, they can effectively resist even if end tensile cracks occur in the cold joint area (joining surface), making it possible to provide a PSC member and a manufacturing method using an integrated pretension anchoring block with increased durability.

Figure 1a is an example of structure construction using a conventional pretension method;
Figure 1b is an example of another conventional pretension production table,
Figure 1c is an example of a manufacturing method of a pretension member using a conventional tension part;
Figure 2a is a conceptual diagram of manufacturing a PSC member using the integrated pretension anchoring block of the present invention;
Figure 2b is an example of a PSC member using the integrated pretension anchoring block of the present invention;
Figures 3a and 3b show a flowchart of a method for manufacturing a PSC member using an integrated pretension anchoring block.

Below, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts that are not related to the description are omitted, and similar parts are given similar reference numerals throughout the specification.

Throughout the specification, when a part is said to “include” a certain element, this means that it may further include other elements rather than excluding other elements, unless specifically stated to the contrary.

[PSC member (100) using the integrated pretension anchoring block (110) of the present invention]

Figure 2a is a conceptual diagram of manufacturing a PSC member 100 using the integrated anchorage block 110 for pretension of the present invention, and Figure 2b is an exemplary diagram of the PSC member 100 using the anchorage block 110 for integrated pretension of the present invention. It is shown.

Referring to Figure 2a, when the PSC girder (PSC member) is set in a simple support form at both ends using the bottom surfaces of both ends (in the case of the present invention, integrated pretension anchoring blocks) as fulcrums, the vertical stress is generated by the bending moment due to the applied load. As excessive shear force occurs, it can be seen that end tension cracks are formed sloping upward from both ends to the side, and it can be seen that the PSC girder has a destruction mechanism in which bending cracks occur from the bottom of the central part.

Accordingly, the present invention can be said to be for manufacturing a PSC member capable of controlling the end tensile tension cracks in the field using a pretension method using an integrated pretension anchoring block 110.

To this end, the PSC member 100 including the PSC girder of the present invention is set with the integrated pretension anchoring blocks 110 spaced apart from each other, as shown in Figure 2b.

The tension member 130 drawn out through the anchoring block 110 for integrated pretension so as to pass through the PSC body 120 is tensioned and then anchored to the anchoring block 110 for integrated pretension. The anchoring block 110 and the PSC body 120 are integrated with each other.

That is, it can be seen that in manufacturing the PSC member 100 so that compressive stress is introduced by the pretension method, an integrated pretension anchoring block 110 is used as a configuration for pre-tensioning and anchoring the tendon member 130. It can be seen that the PSC body portion 120 is integrally coupled between the integrated pretension anchoring blocks 110.

At this time, the integrated pretension anchoring block 110 is first manufactured using a precast method, and then a formwork is installed between the integrated pretension anchoring blocks 110 and concrete is poured to form the PSC body 120 on both sides. Because it is coupled to the integrated pretension anchoring block 110, the construction joint (A) is naturally created.

However, since the integrated pretension anchoring block 110 is manufactured using a precast method, it has no choice but to be manufactured to a certain size, and is manufactured to the minimum possible size to minimize the weight.

A problem arises in that the joining surface 113, which is the construction joint, is inevitably formed at a location where an end tension crack occurs in the PSC member 100.

Accordingly, the present invention is such that both wing walls 112 of the integrated pretension anchoring block 110 are formed in the form of a trapezoid or triangular plate with an upper and lower beam, and have a coupling surface 113 extending slanted downward from the top toward the center. However,

The coupling surface 113 is formed to cross the end tension cracks in a shape perpendicular to each other so that the coupling surface 113 serves to control the end tension cracks without further expanding them.

At this time, the coupling surface 113 may be formed at a location that does not meet the end tension crack, but the area where the integrated pretension anchoring block 110 and the PSC body 120 are joined to each other is the area where the end tension crack occurs. If the extension length of both wing walls 112 is formed too small so that it is not formed in the area, the area where the tendon material 130 is anchored may become vulnerable to concentrated stress,

If the extension length of both wing walls 112 is formed by extending the length too much, the self-weight may increase even if manufactured using the precast method, which offsets the manufacturing advantage of the integrated pretension anchoring block 110 manufactured in an optimized form, so it is most optimal. When manufacturing the integrated pretension anchoring block 110 in the specified size, a problem arises in that end tension cracks are inevitably formed at the area where the joining surface 113 is formed.

Accordingly, the present invention is to ensure that the coupling surface 113 of the anchoring block 110 for integrated pretension is located at the area where end tensile cracks occur, and to control the anchorage block 110 for integral pretension by controlling these end tensile cracks. will be produced.

For this purpose, the PSC member 100 using the integrated anchorage block 110 for pretension of the present invention is prefabricated by precast without a separate production table, and a formwork is installed between the anchorage blocks 110 for integrated pretension. ,

After setting the tension material 130 inside the formwork and allowing it to be drawn out through the integrated pretension anchoring block 110,

When concrete is poured and the PSC body 120 is integrated with the integrated pretension anchoring block 110, the tension member 130 is tensioned and anchored to the integrated pretension anchoring block 110 to form the PSC member ( 100) was produced,

The coupling surface 113 of the integrated pretension anchoring block 110 is located at the area where the end tension crack occurs to enable control.

Accordingly, the PSC member 100 using the integrated pretension anchoring block 110 of the present invention includes the integrated pretension anchorage block 110, the PSC body 120, and the tension member 130, as shown in FIGS. 2A and 2B. , It is manufactured to include a crossbeam 140.

First, the integrated pretension anchoring block 110 is manufactured using a precast method, as shown in Figure 2b, and has two wing walls ( It can be seen that 112) extends in the longitudinal direction for a certain length, and both wing walls 112 are formed in the shape of a trapezoid or triangular plate of the upper and lower beams, and the end surface extends inclined downward from the upper toward the center (113). ) can be seen to be formed.

Accordingly, the coupling surface 113 of the integrated pretension anchoring block 110 is in contact with the end surface of the PSC body 120 and is integrated with each other, and the tension member 130 arranged to pass through the inside of the PSC body 120 is the wing wall. The tension member 130 is pulled out to the outside via 112 and the vertical plate 111 and is tensioned and fixed to the front of the vertical plate 111.

At this time, the integrated pretension anchoring block 110 simply acts as a anchoring block for introducing compressive stress by prestress into the PSC body 120, and is called integral (structurally) in the sense that it will not be disassembled from the PSC body 120 in the future. integrated with each other) and acts as a part of both end surfaces of the PSC member 100 using the integrated pretension fixing block 110.

In addition, referring to FIG. 3A, the integrated pretension anchoring block 110 is configured such that both ends of the internal reaction bar 114 disposed in the longitudinal direction in the space between both PSC body parts 120 are supported in contact with each other. It also plays a role.

The tension material 130 is pre-tensioned before pouring concrete for manufacturing the PSC body 120, and after pouring the concrete, when the amount of frit stress introduced as relaxation (release of the tension material) increases, Buckling and twisting of the PSC body 120 may occur, so stable anchorage may occur when prestress is introduced into the integrated pretension anchorage blocks 110 spaced apart from each other in the longitudinal direction of the PSC body 120. To make this possible, the internal reaction force 114 is used.

This internal reaction force 114 is located inside the PSC body 120 using a circular steel pipe, etc., so that both ends are in contact with the inner surface of the integrated pretension anchoring block 110 facing each other, and can be set and finally dismantled. You can use it.

In addition, a bottom plate 115 is further formed integrally with the lower rear surface of the vertical plate 111, and both wing walls 112 are formed on both rear surfaces of the vertical plate 111 based on the upper surface of the bottom plate 115. You can see that it can be done.

Referring to FIGS. 2A and 2B, the PSC body 120 is formed to move as one body by pouring concrete at the site using a formwork between two integrated pretension anchoring blocks 110 spaced apart from each other in the longitudinal direction. This is the part of the concrete body where the necessary prestress (compressive stress) is introduced by the tendon 130.

Referring to FIG. 3b, this PSC body 120 is first set apart from the anchorage blocks 110 for both integrated pretensions in the longitudinal direction, and then placed in concrete so as to be structurally integrated with the anchorage blocks 110 for both integral pretensions. Since it is formed by pouring, the construction joint (A) is naturally formed on the coupling surface 113 in contact with both integrated pretension anchoring blocks 110.

Accordingly, in optimizing the longitudinal extension length of the two integrated pretension anchoring blocks 110 of the construction joint (A) on the coupling surface 113, the end tension cracks that can be seen in Figure 2a are formed on the coupling surface 113. It is bound to form in the area where this occurs.

Accordingly, the present invention is such that the coupling surface 113 of the integrated pretension anchoring block 110 is located at the area where the end tension crack occurs,

Both wing walls 112 of the integrated pretension anchoring block 110 are formed in the form of a trapezoid or triangular plate with an upper and lower beam, and have a coupling surface 113 extending slanted downward from the top toward the center,

The coupling surface 113 extends in a direction perpendicular to the end tension cracks to control (constrain and control) the tension cracks, so that the integrated pretension fixing block 110 and the PSC body 120 It can be seen that it is being manufactured in an integrated manner.

Accordingly, the anchoring block 110 for integrated pretension is a precast method, and the PSC body 120 is an on-site concrete pouring method in which concrete is poured on site. The PSC member 100 using the anchorage block 110 for integrated pretension is It can be seen that it is formed in the shape of a box with the upper part open and extending, but the cross-sectional shape is not otherwise limited.

At this time, although not shown, it is desirable to have a shear connector such as a stud that crosses from the coupling surface 113 at right angles to the end tension crack protrude from the coupling surface 113 in advance.

Next, referring to FIGS. 2A and 2B, the tension member 130 passes through the PSC body 120 and penetrates both integrated pretension anchorage blocks 110 to form the number of integral pretension anchorage blocks 110. In a state in which it is pre-set to be injected from the direct plate 111 to the outside, it is tensioned before pouring concrete to form the PSC body 120, and is then fixed to the front of the vertical plate 111 of the integrated pretension anchoring block 110. , compressive stress (prestress) is introduced into the concrete poured and cured PSC body 120.

Accordingly, a sheath is pre-arranged in the integrated pre-tension anchoring block 110 so that the tension member 130 can penetrate, and is set to be located at the lower part of the PSC body 120. When anchoring after tension, as shown in Figure 3b, To prevent the positions of the integrated pretension fixing blocks 110 from changing, the internal reaction bar 114 is attached to the inner surface of the facing integrated pretension fixing blocks 110 so that they can be attached and detached in advance, but brackets, etc. It is fixedly installed using .

It is possible to introduce more stable compressive stress (prestress) by the integrated pretension anchoring block 110 supported by the internal reaction bar 114, and the internal reaction bar 114 uses a steel pipe, etc., but is assembled and installed. However, referring to Figure 3b, once the introduction of compressive stress (prestress) is completed, it is separated and reused.

It can be seen that the tension member 130 is set in a parabolic shape curved downward across both the integrated pretension anchoring block 110 and the PSC body 120, but other forms of arrangement are naturally possible.

Next, as shown in FIGS. 2A and 2B, the cross beam 140 is in the form of a vertical plate formed between both PSC body parts 120 and spaced apart in the longitudinal direction, and is attached to the integrated pretension anchoring block 110 with a tension member 130. ) is formed to prevent distortion, buckling, etc. when compressive stress (prestress) is introduced.

This crossbeam 140 is manufactured using a precast method and is set so that the internal reaction bar 114 penetrates the central part, and then, when pouring concrete for both PSC body parts 120, both PSC body parts 120 and both side ends It is formed to be integrated, and only the internal reaction force band 114 penetrating the central part is dismantled to remain in the end. These crossbeams 140 do not need to be formed separately.

Accordingly, according to FIG. 2b, the PSC member 100 using the integrated pretension anchoring block 110 of the present invention is set so that both integral pretension anchoring blocks 110 are spaced apart from each other in the longitudinal direction and face each other,

The PSC body portion 120 extends in the longitudinal direction and is integrated with the coupling surface 113 of both integrated pretension anchoring blocks 110, and the tension member 130 is horizontally positioned at the lower part of both PSC body portions 120. Let it be placed,

It is arranged to be inclined upward toward the integrated pretension anchoring block 110 and is tensioned and anchored to the vertical plate 111 of the integrated pretension anchoring block 110, and the crossbeams 140 are PSC bodies spaced apart from each other in the transverse direction. It can be seen that the parts 120 can be manufactured in the form of a box with an open top by allowing them to be integrated while being spaced apart from each other in the longitudinal direction.

[Method of manufacturing PSC member (100) using integrated pretension anchoring block (110) of the present invention]

Figures 3a and 3b show a flowchart of a method of manufacturing a PSC member 100 using an integrated pretension anchoring block 110.

The method of manufacturing the PSC member 100 using the integrated anchorage block 110 for pretension is to set both integral anchorage blocks 110 for pretension, which are prefabricated using the precast method, to face each other at the site without a separate production table. after,

After installing the internal reaction bar 114 on which the crossbeam 140 is installed, tensioning the tension member 130 in advance, and anchoring it to the integrated pretension anchoring block 110,

It can be said to be a method of integrating both PSC body portions 120 with the integrated pretension anchoring block 110 while allowing the tension member 130 to be buried, and dismantling and separating the internal reaction force 114.

First, as shown in FIG. 3a, both integrated pretension anchoring blocks 110 prefabricated on the floor of the site are set to face each other at the site, and the internal reaction bar 114 is set to form both integrated pretension anchoring blocks ( 110) It is installed between the inner sides.

That is, as shown in FIG. 3A, it can be seen that in step 1, both integrated pretension anchoring blocks 110 are set to face each other in the field.

This double-integrated pretension fixing block 110 has a bottom plate 115 integrally formed at the bottom of the inner side of both side ends of the vertical plate 111, and the upper surface of the bottom plate 115 and the inner side of both side ends of the vertical plate 111. Both wing walls 112 spaced apart from each other extend a certain length, and the end surfaces of both wing walls 112 are inclined downward from the top toward the center from both inner surfaces of both vertical plates 111 in the form of a trapezoid with an upper lower beam. It is formed with an extending coupling surface 113 and is manufactured in advance using a precast method.

Next, as shown in Figure 3a, according to step 2, the cross beam 140 penetrates the central part of the inner surface of both integrated pretension anchoring blocks 110 set to face each other, so that the internal reaction force extends in the longitudinal direction for a certain length. At least one stand 114 is fixed and installed so that it can be detached.

This internal reaction force 114 minimizes the weight and allows the crossbeam 140 to pass through the central part, but there is no problem even if the crossbeam 140 is not formed.

As a result, it can be seen that both integral pretension anchoring blocks 110 in the longitudinal direction are set to be supported on both ends of the crossbeam 140, and that they can be simply installed by setting them on the floor without a production table at the site. It can be seen that a sheath is pre-embedded in both integrated pretension anchoring blocks 110 so that the tension member 130 can be disposed therethrough.

Next, as shown in FIG. 3b, the anchoring block 110 for both integrated pretensions set by the internal reaction bar 114 is tensioned and anchored using the tension member 130, and the PSC body 120 is tensioned and anchored to the anchoring block 110 for both integrated pretensions. After integration with the anchoring block 110, compressive stress (prestress) is introduced into both integrated pretension anchoring blocks 110 and the PSC body 120 through the tension member 130.

That is, according to step 3 of FIG. 3B, the tension material 130 penetrates both integrated pretension anchorage blocks 110 so that both sides penetrate the inside of the anchorage block 110 for pretension and is connected to the PSC body. It is designed to include a PC steel wire arranged to pass through the unit 120,

It can be seen that this tension member 130 is pre-tensioned before forming the PSC body portion 120 and then anchored to both integrated pretension anchoring blocks 110.

This tensioning and anchoring of the tension member 130 makes it possible to introduce a stable compressive stress (prestress) because both integrated pretension anchoring blocks 110 are supported by the internal reaction force 114 without changing their positions.

At this time, it can be seen that the tension member 130 is used to penetrate the bottom plate 115, both wing walls 112, and the vertical plate 111 of both integrated pretension anchoring blocks 110.

Next, according to step 4 of Figure 3b, the PSC body 120 is formed (not shown) on both integrated pretension anchoring blocks 110 and the coupling surface 113 while allowing the tension material 130 anchored after tension to be buried. ) is integrated by pouring concrete, and the coupling surface 113 extends in a direction perpendicular to the end tensile cracks to control (confine and control) the tensile cracks. An integrated pretension anchoring block ( It can be seen that the 110) and the PSC body 120 are manufactured in an integrated manner.

Accordingly, the internal reaction arm 114 is separated and dismantled, and the crossbeam 140 is also integrated together when pouring concrete for the PSC body 120.

The PSC member 100 using the integrated fixing block for pretension according to the present invention does not require a separate complicated manufacturing table for its production, and both integrated fixing blocks 110 for pretension are integrated with the PSC body 120. It can be seen that it can be manufactured using the pretension method simply by following the instructions.

The description of the present invention described above is for illustrative purposes, and those skilled in the art will understand that the present invention can be easily modified into other specific forms without changing the technical idea or essential features of the present invention. will be. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. For example, each component described as unitary may be implemented in a distributed manner, and similarly, components described as distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims described below rather than the detailed description above, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. do.

100: PSC member
110: Anchoring block for integrated pretension
111: vertical plate 112: wing wall
113: coupling surface 114: internal reaction force
115: bottom plate
120: PSC body 130: Tension material
140: crossbeam

Claims (12)

Tension material 130 is tensioned between anchorage blocks 110 for integrated pretension made of precast and supported to be spaced apart from each other and anchored to the anchorage block 110 for integrated pretension; and
In a state where the tension member 130 is structurally integrated with the integrated pretension anchorage block 110 by pouring and curing the concrete so that the tension member 130 is buried between the anchorage blocks 110 for integrated pretension, It includes a PSC body portion 120 formed to introduce compressive stress by releasing the anchored state of (130),
The coupling surface 113 of the integrated pretension anchoring block 110 in contact with the PSC body 120 has an end tension crack that acts by using the bottom surfaces of both ends of the integrated pretension anchoring block 110 as simple fulcrums. A PSC member using an integrated pretension fixing block that is controlled by being perpendicular (crossing). According to paragraph 1,
The integrated pretension anchoring block 110 is,
An integrated type in which the tension member 130 is anchored to the anchoring block 110 for integrated pretension in a state in which both ends of the internal reaction bar 114 disposed longitudinally in the space between the PSC body 120 are supported in contact. PSC member using anchoring block for pretension. According to paragraph 1,
The integrated pretension anchoring block 110 is,
A vertical plate (111) on which the tension material (130) is settled after tension; And both wing walls 112 are formed on both rear surfaces of the vertical plate to be spaced apart in the transverse direction and include a coupling surface 113 whose end surfaces extend toward the center in the longitudinal direction.
A PSC member using an integrated pretension anchoring block that is manufactured using a precast method so that the coupling surface 113 formed on the end surface of the wing wall 112 is perpendicular to (crossing) the end tension crack. According to paragraph 3,
A bottom plate 115 is further formed integrally with the bottom of both rear surfaces of the vertical plate 111, and both wing walls 112 are formed on the rear surface of the vertical plate 111 based on the upper surface of the bottom plate 115. PSC member using anchoring block for pretension. According to paragraph 3,
A PSC member using an integrated pre-tension fixing block so that a shear connector including a stud crossing at right angles to the end tension crack from the coupling surface 113 protrudes from the coupling surface 113 in advance. According to paragraph 1,
The tension member 130 penetrates the sheath of both integrated pretension anchorage blocks 110 via the PSC body portion 120 and is inserted from the vertical plate 111 of the integrated pretension anchorage block 110 to the outside. A PSC member using an integrated pre-tension fixing block that is fixed to the front of the vertical plate 111 of the integrated pre-tension fixing block 110 in a pre-set state. According to paragraph 1,
It is in the form of a vertical plate formed between the PSC body parts 120 and spaced apart in the longitudinal direction, and prevents distortion and buckling when compressive stress (prestress) due to the tension member 130 is introduced into the integrated pretension anchoring block 110. A PSC member using an integrated pretension anchoring block to which a crossbeam 140 is further installed. In clause 7,
The crossbeam 140 is,
After setting the precast method so that the internal reaction bar 114 penetrates the central part, when pouring concrete for the PSC body 120, the PSC body 120 and both side ends are formed to be integrated, and the central part is formed. A PSC member using an integrated pretension anchoring block that dismantles only the penetrating internal reaction force (114) to remain. (a) setting the integrated pretension anchoring blocks 110 manufactured by precasting to be supported and spaced apart from each other;
(b) tensioning between the integrated pretension anchorage blocks 110 and anchoring the tension member 130 to the integrated pretension anchorage block 110;
(b) Concrete is poured and cured so that the tension member 130 is buried between the integrated pretension anchorage blocks 110 to which the tension member 130 is anchored, thereby forming the integrated pretension anchorage block 110 and the PSC body structurally. Integrating (120); and
(d) releasing the anchoring state of the tendon 130 to introduce compressive stress into the PSC body 120;
In step (b), the coupling surface 113 of the integrated pretension anchoring block 110 in contact with the PSC body 120 uses the bottom surfaces of both ends of the integrated pretension anchoring block 110 as simple fulcrums. A method of manufacturing a PSC member using an integrated pretension anchoring block that is controlled by being perpendicular (crossing) to the acting end tension crack. According to clause 9,
The PSC member to which compressive stress was introduced in step (d),
The PSC body portion 120, which is structurally integrated with the integrated pretension anchoring block 110, is a PSC girder. A method of manufacturing a PSC member using an integrated pretension anchoring block. According to clause 9,
The integrated pretension anchoring block 110 in step (a) is,
A PSC member using an integrated pre-tension fixing block that allows installation by setting it on the floor without a production table in the field, and uses a precast method so that the sheath is pre-embedded so that the tension member (130) can be placed through it. Production method. According to clause 11,
The integrated pretension anchoring block 110 is,
An integrated type in which the tension member 130 is anchored to the anchoring block 110 for integrated pretension in a state in which both ends of the internal reaction bar 114 disposed longitudinally in the space between the PSC body 120 are supported in contact. Method of manufacturing PSC members using anchorage blocks for pretension.