KR20230052741A - Precast inner mould and precast structure using the same - Google Patents

Abstract

Disclosed are a precast inner mold, and a precast structure using the same. The present invention uses the precast inner mold manufactured by concrete for manufacturing an inner hollow portion (S) of the precast structure and has a plurality of fixing end formation units to effectively resist to concrete application pressure applied to the precast inner mold, thereby more economically constructing the precast structure.

Description

Precast inner formwork and precast structure using the same {PRECAST INNER MOLD AND PRECAST STRUCTURE USING THE SAME}

The present invention relates to a precast inner formwork and a precast structure using the same. More specifically, a precast inner formwork made of concrete is used to manufacture the inner hollow portion (S) of the precast structure, but a plurality of fixed end formations can effectively resist the concrete placing pressure acting on the precast inner formwork. It relates to a precast inner formwork that can construct a precast structure more economically by allowing it to be formed and a precast structure using the same.

Figure 1a is a manufacturing example of a half precast column using a conventional embedded type internal formwork.

According to FIG. 1A, the half precast column has an inner hollow portion (S) formed, and the shear connecting reinforcement 40 extending and exposed to the inner hollow portion (S) is also reinforced as an internal reinforcement of the half precast column, it can be seen that there is

Looking at the manufacturing method of such a half-precast column is as follows.

That is, as shown in Figure 1a, a first step of installing a plurality of shear connecting reinforcing bars 40 having a plurality of main bars 12 and both ends bound to the main bars;

A second step of installing a plurality of lightweight steel beams 50 equipped with a plurality of stud bolts 60 at a portion where a plurality of shear connecting reinforcing bars 40 cross each other, except for the central portion;

A third step of installing a recessed internal formwork 20 so as to be in contact with the outside of the cross section of the grid composed of the plurality of shear connecting reinforcing bars 40 and the plurality of lightweight steel beams 50;

A fourth step of installing a plurality of additional main roots 12 and large roots 14;

A fifth step of installing an external formwork (OF) spaced apart from the outside of the bar 14 at a predetermined interval and placing PC concrete 16 between the external formwork (OF) and the embedded type internal formwork 20; and

It is configured to include; a sixth step of separately pouring the filling concrete 70 in the inner hollow part (S) at the site, etc.

The embedded type internal formwork 20 is a rib-lath in the form of a reinforcing bar network with through-holes formed, and is not otherwise demolded, embedded and installed in the filling concrete 70, and used as an internal formwork when placing PC concrete 16 Therefore, it can be seen that there is an advantage that no formwork manufacturing equipment for piles is required.

However, since the rib-lass embedded type internal formwork (20, a kind of reinforcing bar network) is only installed to be supported by the shear connecting reinforcing bars 40, it is deformed by the pouring pressure of the PC concrete 16 and the deep concrete 70 Because this could occur, there was a limit that quality control was not easy.

Figure 1b is a conventional half-precast wall construction example diagram.

That is, the outer panel 81 and the inner panel 82 spaced apart and facing each other;

a plurality of truss connecting members 83 interconnecting the outer panel 81 and the inner panel 82;

A precast wall including rail members 84 and 85 installed in the outer panel 81 and the inner panel 82 and connected to the truss connecting member 83 is introduced.

In other words, when a wall in the form of a panel is manufactured and connected by a full-precast method, there are restrictions on size and construction, so after installing the outer panel 81 and the inner panel 82 in a form spaced apart from each other at the site,

Concrete is poured into the inner space between the outer panel 81 and the inner panel 82 to be combined with each other, and the outer panel 81 is formed using internal steel materials such as the truss connecting member 83 and the rail members 84 and 85. And while integrating the inner panel 82 with each other, it is intended to solve the difficulty of reinforcement.

It can be seen that a double-wall installation method such as the outer panel 81 and the inner panel 82 can be used in the field, but there is a limit in usability due to the use of a plurality of truss connecting members 83.

1c is an exemplary installation view of a conventional shear reinforcing bar head.

That is, both ends of the shear reinforcing bars 33 are inserted and fastened so as to pass through the center of the socket portion 36, and the socket portion 36 is formed to be inserted into the through hole 32 formed in the fixing plate 31 It can be seen that, since a threaded portion is formed on the outer circumferential surface of the socket portion 36, the socket portion 36 is fixed to the fixing plate 31 by the fixing nut 35 so that it can be fixed.

However, since the socket portion 36 can stably support the socket portion 36 while having a fixing plate function only when the thickness of the fixing plate 31 is secured at least a certain thickness, the fixing plate is embedded in the filling concrete. There was a limitation that it was somewhat inefficient when used as an internal formwork.

As a result, when constructing wall structures and column structures by the precast method on the upper surface of the conventional base plate, it can be seen that the half or full-precast method is used, and this half-precast method is also used to pour the filling concrete. Although it can be seen that the embedded type internal formwork is used for this, there is a limit that it is not easy to manufacture a more economical precast structure through thickness optimization when using this using a precast member.

Republic of Korea Patent Publication No. 10-2020-0112052 (Title of Invention: Precast Wall with Reinforced Casting Pressure Resistance, Publication Date: October 05, 2020) Republic of Korea Patent No. 10-1327388 (Title of Invention: PC Wall for Prefabricated PC Structure with Upper and Lower 2 Divisions with Bending Moment and Static Moment Resistance Expansion Structure, Publication Date: November 08, 2013) Korean Patent No. 10-2157864 (Title of Invention: Prefabricated Rebar Head for Shear Reinforcement, Publication Date: December 19, 2019) Republic of Korea Patent No. 10-0999020 (title of invention: synthetic PH pile and synthetic PH pile construction method, publication date: December 09, 2010) Republic of Korea Patent No. 10-1570484 (Title of Invention: HPC column using lightweight embedded type internal formwork and its manufacturing method, and construction method using the same, Publication date: November 20, 2015)

Therefore, the present invention is a wall structure or column by using a precast inner formwork made of concrete that can minimize (weight reduction) its own weight as an inner formwork for embedding, is easy to assemble and install, and can more effectively resist the concrete pouring pressure. The technical problem to be solved is to provide a precast inner formwork that can be manufactured more efficiently and economically for structures and a precast structure using the same.

In addition, the present invention is to form a bending moment support point member for effectively supporting the PC concrete pouring pressure by using a fixed end forming part using shear connecting reinforcing bars in the precast inner formwork, while using shear connecting reinforcing bars to form a wall or column structure It is a technical problem to solve the provision of a precast inner formwork and a precast structure using the precast inner formwork that can arrange reinforcing bars and quickly produce a wall or column structure.

The precast inner formwork of the present invention for achieving the above object is a buried formwork including a first precast inner formwork and a second precast inner formwork; And a rib member integrally formed on the inner surface of the landfill formwork, comprising an inner reinforcing member formed to reinforce the landfill formwork,

The first precast inner formwork and the second precast inner formwork symmetrically contact each other so that the inner hollow portion S is formed.

The precast wall structure according to the present invention allows the reinforcement of the structure reinforcement and the shear connection reinforcement to be placed together in the precast inner formwork, but it is possible to manufacture the precast structure by PC concrete and filling concrete without complex formwork equipment.

The precast structure according to the present invention can be formed into a structure effective in resisting the pouring pressure of PC concrete by forming a fixed end portion at the portion where the shear connecting reinforcing bar penetrates the precast inner formwork, thereby minimizing the weight. Constructability and workability can be secured.

Figure 1a is an example of manufacturing a half precast column using a conventional embedded internal formwork
Figure 1b is a conventional half-precast wall construction example,
1c is an example of installing a conventional shear reinforcing bar head;
Figures 2a and 2b is a configuration example of the precast inner formwork of the present invention and an example of a fixed end forming part,
Figures 3a, 3b, 3c and 3d are examples of precast wall and column structures of the present invention.

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated.

[Precast inner formwork 100 of the present invention]

2a and 2b show an exemplary configuration of the precast inner formwork 100 and a fixed end forming part 130 of the present invention.

Referring to FIG. 2A, the precast inner formwork 100, for example, the first precast inner formwork 111 and the second precast inner formwork 113 of a U-shaped cross section contact each other symmetrically, and the inner hollow part (S) As it is formed,

On the inner surfaces of the first precast inner formwork 111 and the second precast inner formwork 113, the inner surface stiffeners 115 are spaced apart from each other and integrated so that the cross-sectional thickness can be minimized, while the precast inner formwork ( 100) so that it can more effectively resist the concrete pouring pressure acting on it.

This precast inner formwork 100 is used to form the inner hollow portion S of the precast wall structure 200a or column structure 200b, which is the precast structure 200, and the inner hollow portion S has The filling concrete 160 is poured, and the shear connection reinforcing bar 121 is installed to penetrate the precast inner formwork 100 to secure the composite performance, and the fixed end forming part 130 is formed at the penetration site By doing so, it is possible to form a structure effective in resisting the pouring pressure of PC concrete, thereby minimizing the weight, so that workability and workability according to light weight can be secured.

To this end, the precast inner formwork 100 of the present invention includes a landfill formwork 110, a reinforcing bar network 120, and a fixed end forming part 130, as shown in FIGS. 2A and 2B, and the outer formwork 140, PC The precast structure 200, which is a precast wall structure 200a or a precast column structure 200b, is manufactured using the concrete 150 and the filling concrete 160.

First, as shown in FIG. 2A, the landfill formwork 110 includes a first precast inner formwork 111, a second precast inner formwork 113, an inner reinforcing material 115, a through hole 117, and a flange connection portion 119. ) as containing,

Referring to Figures 3b and 3d, while forming the inner hollow portion (S) of the precast wall structure (200a) or the precast columnar structure (200b) to prevent the PC concrete 150 from leaking into the inner hollow portion (S) In addition, a plurality of fixed ends for the working load are formed in the landfill formwork 110 by the fixed end forming part 130, which also serves to enable manufacturing of a more slippery landfill formwork 110.

Accordingly, referring to FIG. 2A, the first precast inner formwork 111 is formed of a precast concrete plate using concrete in a U-shaped cross section in response to this since the inner hollow portion S is usually formed in a rectangular cross section. It can be seen that the cross-sectional shape can be changed, and the present invention will be reviewed based on the U-shaped cross-sectional shape.

The first precast inner formwork 111 has an extension length corresponding to the extension length of the precast wall structure 200a or the precast column structure 200b according to manufacturing, transportation and installation, and has the same U-shaped cross-sectional shape extension can be seen.

This first precast inner formwork 111 needs to be manufactured in advance and transported, so the weight needs to be reduced. Additional section thickness is also required to resist the concrete placement pressure.

Accordingly, it can be seen that the present invention is such that the inner side reinforcing material 115 is integrally formed on the inner side so that the cross-sectional thickness can be minimized in order to reduce the weight of the first precast inner formwork 111.

Accordingly, the first precast inner formwork 111 integrally formed with the inner reinforcing material 115 can be made of a precast thin plate as much as possible during production to reduce weight, making it very effective for lifting and mounting.

Next, referring to FIG. 2A, the second precast inner formwork 113 is configured so that the first precast inner formwork 111 and both flanges are spaced apart from each other or in contact with each other so that the inner hollow portion S is formed. 1 It can be seen that the precast inner formwork 111 is set to be symmetrical to each other using the same one.

Accordingly, it can be seen that the second precast inner formwork 113 is also formed of a precast concrete plate using concrete in a U-shaped cross-sectional shape, also in order to minimize the cross-sectional thickness of the second precast inner formwork 113 It can be seen that the inner side stiffener 115 is integrally formed on the inner surface, and it can be seen that the inner side stiffener 115 is integrally formed.

As a result, it can be seen that the first precast inner formwork 111 and the second precast inner formwork 113 are set so that they are symmetrical to each other so that the inner hollow portion S is formed as a hollow portion having a square cross section. Although the precast inner formwork 111 and the second precast inner formwork 113 have been disclosed as being symmetrically arranged with each other,

It does not matter if at least two or more precast inner forms are assembled and used in consideration of the cross-sectional shape, etc., and the present invention will be reviewed based on the first precast inner formwork 111 and the second precast inner formwork 113 ..

Next, the inner reinforcing material 115 is a rib member having a U-shaped cross-section integrally formed on the inner surfaces of the first precast inner formwork 111 and the second precast inner formwork 113, as shown in FIG. To reinforce the precast inner formwork 111 and the second precast inner formwork 113, respectively, to make the first precast inner formwork 111 and the second precast inner formwork 113 with a minimized cross-sectional thickness. will be.

It is preferable that the inner reinforcing material 115 be formed together when the first precast inner formwork 111 and the second precast inner formwork 113 are manufactured, and the first precast inner formwork 111 and the second precast inner formwork 111 It can be seen that the cast inner mold 113 is spaced apart in the extending direction.

In addition, the first precast inner formwork 111 and the second precast inner formwork 113 are set to be adjacent to each other, and at the same time, both inner reinforcements 115 are also set to be symmetrical to each other, so that both inner reinforcements 115 to be able to resist the load as a whole.

The inner reinforcing material 115 is formed in the form of a protruding rib with a minimum cross-sectional area along the inner surface shape of the first precast inner formwork 111 and the second precast inner formwork 113, so that the PC concrete 150 It also serves as a shear connector to secure integrity during casting.

Buckling of the first precast inner formwork 111 and the second precast inner formwork 113, which can be particularly effectively resisted against cracks and damages caused by construction loads acting during demolding, manufacturing, transportation, and installation, and minimized cross-sectional thickness. Or, it can effectively resist distortion.

As shown in FIG. 2A, the through hole 117 is formed so that the shear connection reinforcing bar 121 of the reinforcing bar network 120 can pass through the first precast inner formwork 111 and the second precast inner formwork 113. As a hole, the front and rear surfaces of the first precast inner formwork 111 and the second precast inner formwork 113 are fixed by the shear connecting reinforcing bar 121 inserted into the through hole 117 by the fixed end forming part 130 fixed on

According to FIG. 2A, the through hole 117 connects the first precast inner formwork 111 and the second precast inner formwork 113 in the upper, lower, left, and It can be seen that many are formed so as to penetrate over the right four sides.

As shown in FIG. 2A, the flange connection part 119 is for connecting both adjacent flanges of the first precast inner formwork 111 and the second precast inner formwork 113 adjacent to each other.

For example, notches 119a for connection are formed at both flange ends of the first precast inner formwork 111 and the second precast inner formwork 113 as shown in FIG. 2A, and the first precast inner formwork adjacent to each other ( 111) and the second precast inner formwork 113 by inserting the notch strips 119b into both notches 119a, PC concrete 150 is formed between the end surfaces of both flanges while connecting them to each other. It also serves to prevent leakage.

In the through hole 117, since the shear connecting reinforcing bars 121 are blocked by the fixed end forming part 130, there is no worry of leakage, and precast concrete or rubber materials can be used.

As shown in FIG. 2A, the reinforcing bar network 120 is assembled and installed in the precast inner formwork 100 as internal reinforcing bars of the precast structure 200 including the precast wall structure 200a or the precast column structure 200b. will do,

As the reinforcing bar network 120, the structural reinforcing bars 122 are arranged so as to be embedded in the PC concrete 150, and as the reinforcing bar network 120, the shear connection reinforcing bars 121 exposed to the inner hollow part S are filled with concrete By being buried by (160), it serves as a shear connection reinforcing bar of the precast structure 200 and an internal reinforcing bar of the precast structure 200.

Accordingly, as shown in FIG. 2A, it can be seen that the reinforcing bar network 120 includes the shear connection reinforcing bars 121 and the structure reinforcing bars 122.

First, as shown in FIG. 2A, the shear connecting reinforcing bar 121 passes through a plurality of through holes 117 formed in the first precast inner formwork 111 and the second precast inner formwork 113 to form an inner hollow portion (S). ) is a reinforcing bar installed so that it is placed across the

Accordingly, it is embedded in the filling concrete 160 filled in the inner hollow part (S) and serves as a shear reinforcing bar of the precast structure 200.

In addition, as the fixed end forming part 130, which is a compression sleeve formed in the through hole 117 into which the shear connecting reinforcing bar 121 is inserted, is compressed, the first precast inner formwork 111 and the second precast inner formwork 113 The shear connecting reinforcing bar 121 is fixedly installed to serve as an intermediate support point member for the bending moment.

Next, as shown in FIG. 2A, the structural reinforcement 122 is connected to the bent end of the shear connection reinforcement 121 and reinforced, and the first precast inner formwork 111 and the second precast inner formwork 113 It includes reinforcing bars formed around it, and it is arranged so as to be embedded in the PC concrete 150.

By placing the structural reinforcement 122 at the end of the shear connection reinforcement 121, it is possible to quickly and simply place the reinforcing bar network 120 in the embedded formwork 110, so the shear connection reinforcement 121 is structure reinforcement 122 ), it is desirable to also serve as a connecting reinforcing bar.

Next, the fixed end forming part 130 is a through hole 117 formed in the landfill form 110 such as the first precast inner formwork 111 and the second precast inner formwork 113, as shown in FIGS. 2A and 2B. ) so that the shear connecting reinforcement 121 is fixed to the PC concrete 150 to serve as a support point member for the bending moment generated by the pouring pressure.

That is, the shear connection reinforcement 121 is inserted through the through hole 117 formed to penetrate the landfill formwork 110, but the shear connection reinforcement 121 is attached to the landfill formwork 110 by the compression sleeves 132 and 133. It is fixedly installed so that the shear connecting reinforcing bar 121 serves as a support point member for the bending moment generated by the pouring pressure of the PC concrete 150.

Accordingly, the compression sleeve, which is the fixed end forming part 130, is divided into two embodiments, as shown in FIG. 2B.

That is, when the compression sleeve is set to surround the shear connecting reinforcing bar 121 reinforced so as to penetrate the through hole 117 with two semicircular compression sleeves 132 as shown in FIG. The semicircular compression sleeve 132 is directly compressed to the outer circumferential surface of the shear connecting reinforcing bar 121 and is fixed to the landfill form 110.

The semicircular compression sleeve 132 is installed on the landfill formwork 110 based on the through hole 117 so that the shear connecting reinforcing bars 121 can be more effectively fixed to the landfill formwork 110.

The semicircular compression sleeve 132 compressed in this way is where the shear connection reinforcing bars 121 of the reinforcing bar network 120 are pressed and fixed to the landfill form 110, and the bending moment generated by the placing pressure of the PC concrete 150 serves as a support point member do.

In addition, as shown in FIG. 2B, the compression sleeve is a socket type in which two socket type compression sleeves 133 are inserted toward the rear side of the through hole 117 and two semicircular compression sleeves 132 pass through the through hole 117. When the outer circumferential surface of the socket portion of the compression sleeve 133 is set to be wrapped and compressed with a compression machine, the socket-type compression sleeve 133 is compressed and fixed to the landfill form 110.

Also, the combined semicircular compression sleeve 132 and the socket-type compression sleeve 133 are generated by the pressure of the PC concrete 150 when the shear connection reinforcing bar 121 of the reinforcing bar network 120 is pressed and fixed to the landfill form 110. It serves as a member of the bending moment support point.

In this way, the present invention does not use the threaded fastening method, but uses a compression sleeve, so even if the landfill formwork 110 is used, the shear connecting reinforcing bar 121 is fixed to the landfill formwork 110, so that the PC concrete 150 is poured. It becomes possible to serve as an intermediate support point member for the bending moment that occurs.

Next, as shown in FIGS. 3A and 3C, the outer formwork 140 is installed around the reinforcing bar network 120 integrally placed in the landfill formwork 110 to the opposite side of the inner hollow part S to form PC concrete 150 As a formwork that allows to be poured,

According to FIG. 3B, the structural reinforcement 122 and the shear connection reinforcement 121 of the reinforcing bar network 120 located between the embedded formwork 110 and the external formwork 140 are cast so as to be buried, and after curing, they are demolded and precast. Manufacturing of the structure 200 becomes possible.

Next, as shown in FIGS. 3A and 3C, the PC concrete 150 is concrete poured into the space between the landfill formwork 110 and the outer formwork 140, and the structural reinforcement 122 and the shear connection reinforcement of the reinforcing bar network 120 (121) is integrated with the end.

Next, the filling concrete 160 is filled into the inner hollow part (S) of the precast wall structure (200a) in which the inner hollow part (S) is formed, as shown in FIGS. As concrete that is cast so that the shear connecting reinforcing bar 121 is buried, it is concrete that is cast after the precast structure 200 is brought into the site and set.

[ Precast structure (200: 200a, 200b) of the present invention]

Figures 3a, 3b, 3c and 3d are examples of manufacturing a precast wall structure 200a and a column structure 200b of the present invention.

In the precast structure 200, the reinforcing bar network 120 is placed on the landfill formwork 110 in a factory (which can also be manufactured around the site), and the reinforcing bar network 120 is attached to the landfill formwork 110 by the fixed end forming part 130. The precast structure is press-fitted and integrated, and the PC concrete 150 is poured and cured using the outer formwork 140 so that the shear connecting reinforcing bars 121 of the reinforcing bar network 120 are exposed in the inner hollow part S. 200 is produced,

After bringing the precast structure 200 to the site and constructing it on the base plate,

The filling concrete 160 is poured into the inner hollow part S so that the shear connecting reinforcing bar 121 is buried. Accordingly, in order to form the inner hollow part (S) of the precast wall structure (200a), it is possible not to use a separate inner formwork system,

By using the fixed end forming part 130 formed in the landfill formwork 110 to effectively resist the placing pressure of the PC concrete 150, the amount of installation of the reinforcing bar network 120 can be optimized, and economical and rapid construction is possible. .

According to Figures 3a and 3b, it shows an example of manufacturing a precast wall structure (200a) as a precast structure 200,

When the precast wall structure 200a modules manufactured according to FIG. 3B are spaced apart from each other in the ground and the wall structure connection portion S2 is formed by both connecting flanges, the reinforcing bar assembly 120a is connected to the wall structure connection portion S2 ) and pouring the filling concrete 160 so that the precast wall structure 200a is continuously integrated in the ground.

Accordingly, according to FIG. 3A, the pie-shaped outer formwork 140 is set in advance, and the buried formwork 110 described above is set while the structural reinforcement 122 is placed inside the pie-type outer formwork 140, and then the buried formwork 110 It can be seen that the PC concrete 150 is being poured and cured between the ) and the pie-shaped outer formwork 140.

At this time, the buried formwork 110 described above is manufactured in advance at the factory. Unlike the first precast inner formwork 111 and the second precast inner formwork 113, the shear connecting reinforcing bars 121 are not formed, so the through hole ( 117) is not formed.

Accordingly, the first precast inner formwork 111 and the second precast inner formwork 113 are set symmetrically with both flanges spaced apart from each other,

A flange connection part 119 is formed between the flanges of the first precast inner formwork 111 and the second precast inner formwork 113, so that the first precast inner formwork 111 and the second precast inner formwork 111 adjacent to each other are formed. It can be seen that the PC concrete 150 is prevented from leaking into the inner hollow part (S) by connecting both flanges of the cast inner formwork 113 to each other.

Accordingly, according to FIG. 3B, one precast wall structure 200a module demolded to the outer formwork 140 can be confirmed and it can be seen that the inner hollow part S is formed.

This precast wall structure (200a) module forms an excavation hole at a certain depth by trench excavation in the ground,

After placing both flanges of the precast wall structure (200a) module in contact with the excavation hole, when the wall structure connection portion (S2) is formed by both connection flanges, the reinforcing bar assembly (120a) is connected to the wall structure connection portion (S2). ) and pouring the filling concrete 160 so that the precast wall structure 200a is continuously integrated in the ground.

At this time, it is preferable to further install a reinforcing bar (120b) for the additional wall structure connection portion so as to pass through the portion where the connection flange is in contact to secure it integrally. The reinforcing bar 120b for the wall structure connection portion may be formed by setting to be drawn out from the outer formwork 140, or may be separately inserted into the flange.

3c and 3d show an example of manufacturing a precast columnar structure 200b as the precast structure 200,

It can be seen that in the state in which the manufactured precast crane structure 200b according to FIG. 3d is self-supportingly installed on the base plate, beam members and girders, not shown, can be connected and installed.

Accordingly, according to FIG. 3C, the rectangular outer formwork 140 is set in advance on the base, and the structural reinforcement 122 is placed inside the rectangular outer formwork 140, while the embedded formwork 110 and the shear connecting reinforcement 121 described above are placed. After setting, it can be seen that the PC concrete 150 is placed and cured between the landfill form 110 and the rectangular outer formwork 140.

At this time, the buried formwork 110 described above is manufactured in advance at the factory. It can be seen that the case of using a plurality of through holes 117 is shown, and the shear connecting reinforcing bar 121 may not use the fixed end forming part 130 as shown in FIG. 3a. Able to know.

It can also be seen that the embedding formwork 110 can be set by rotating it 45 degrees relative to the horizontal in order to facilitate demolding.

Accordingly, the first precast inner formwork 111 and the second precast inner formwork 113 are set symmetrically with both flanges spaced apart from each other,

A flange connection part 119 is formed between the flanges of the first precast inner formwork 111 and the second precast inner formwork 113, so that the first precast inner formwork 111 and the second precast inner formwork 111 adjacent to each other are formed. It can be seen that the PC concrete 150 is prevented from leaking into the inner hollow part (S) by connecting both flanges of the cast inner formwork 113 to each other.

Accordingly, according to FIG. 3D, it can be confirmed that the precast column structure 200b demolded with the outer formwork 140 is formed, and it can be seen that the inner hollow portion S is formed.

This precast columnar structure (200b) is installed vertically and independently on the base plate, and connects beam members and girders to enable ground structure construction.

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

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

100: precast inner formwork
110: landfill formwork
111: first precast inner formwork
112: through hole
113: second precast inner formwork
115: inner side stiffener 117: through hole
119: flange connection 119a: notch
119b: notch strip
120: rebar net
120a: rebar assembly 120b: rebar for wall structure connection
121: shear connection reinforcing bar 122: structure reinforcing bar
130: fixed end forming part
132: semicircular compression sleeve 133: socket type compression sleeve
140: outer formwork 150: PC concrete
160: filling concrete
200: precast structure
200a: precast wall structure 200b: precast column structure
S: inner hollow part S2: wall structure connection part

Claims (10)

A landfill form 110 including a first precast inner formwork 111 and a second precast inner formwork 113; and
As a rib member integrally formed on the inner surface of the landfill formwork 110, an inner side reinforcing member 115 formed to reinforce the landfill formwork 110; includes,
The first precast inner formwork 111 and the second precast inner formwork 113 contact each other symmetrically so that the inner hollow portion S is formed. According to claim 1,
A reinforcing bar network 120 including shear connection reinforcing bars 121 reinforced so that ends extend to the outside of the embedding formwork 110 by passing through both through holes 112 across the inner hollow part S; And a fixed end forming part 130 formed to press and fix the shear connecting reinforcing bar 121 to the embedding formwork 110; further comprising,
Precast inner formwork in which the shear connecting reinforcing bars 121 act as a support point member for the bending moment generated by the pouring pressure of the PC concrete 150 by the fixed end forming portion 130 that is press-fixed. According to claim 2,
The reinforcing bar network 120,
Internal reinforcing bars including the shear connecting reinforcing bars 121 and structure reinforcing bars 122 of the precast wall structure 200a are assembled and installed in the embedded formwork 110, and the shear connecting reinforcing bars exposed to the inner hollow part S ( 121) is a precast inner formwork to be buried by the filling concrete 160. According to claim 3,
The shear connection reinforcement 121,
It is a reinforcing bar installed to cross the inner hollow part (S) through the plurality of through holes 112 formed in the landfill formwork 110, and is embedded in the filling concrete 160 filled in the inner hollow part (S) It serves as a shear reinforcement of the precast wall structure (200a),
The structural reinforcement 122,
A precast inner formwork that includes a plurality of spaced reinforcing bars to surround the ends of the shear connecting reinforcing bars 121 and is arranged to be embedded in the PC concrete 150. According to claim 1,
The fixed end forming part 130,
When the semicircular compression sleeve 132 as a compression sleeve is set to surround the shear connecting reinforcing bar 121 arranged to penetrate the through hole 112, and is compressed with a compactor, the semicircular compression sleeve 132 is the shear connecting reinforcing bar 121 A precast inner formwork that is directly compressed on the outer circumferential surface of and is fixed to the landfill formwork 110 and serves as a support point member for the bending moment generated by the pouring pressure of the PC concrete 150. According to claim 1,
The fixed end forming part 130,
As a compression sleeve, the socket type compression sleeve 133 is inserted from the through hole 112 toward the front side, and the semicircular compression sleeve is set to surround the outer circumferential surface of the socket portion of the socket type compression sleeve passing through the through hole 112. The compression sleeve 133 is a precast inner formwork that is fixed to the landfill formwork 110 while being compressed and serves as a support point member for the bending moment generated by the pouring pressure of the PC concrete 150. According to claim 1,
The PC concrete 150,
Casting and curing using the outer formwork 140,
The outer formwork 140 is a formwork for placing the PC concrete 150 at a distance from the buried formwork 110, and is demolded after curing to enable the production of a precast wall structure 200a,
In the inner hollow part (S), filling concrete 160 is further poured,
The filling concrete 160 is filled into the inner hollow part (S) of the precast structure 200 and poured so that the shear connecting reinforcing bars 121 of the reinforcing bar network 120 are buried, and the precast structure 200 ) is brought into the site, set, and then cast. According to claim 1,
Further forming notches 119a for connection at both flange ends of the first precast inner formwork 111 and the second precast inner formwork 113,
A notch strip 119b is additionally inserted into both notches 119a of the first precast inner formwork 111 and the second precast inner formwork 113 adjacent to each other, and the first precast by the flange connection part 119 A precast inner formwork that also serves to prevent PC concrete 150 from leaking into the inner hollow portion (S) between both flange end surfaces while connecting the inner formwork 111 and the second precast inner formwork 113 to each other. Produce the precast inner formwork 100 of claim 1,
The shear connecting reinforcing bar 121 is pressed into the embedding formwork 110 so that the end extends to the outside of the embedding formwork 110 across the inner hollow portion S between the embedding forms 110 of the precast inner formwork 100. fixed to form a fixed end forming part 130,
The reinforcing bar network 120 is placed on the embedded formwork 110 using the shear connecting reinforcing bars 121 for the structural reinforcing bars 122,
The outer formwork 140 is installed to be spaced apart from both landfill forms 110, and the PC concrete 150 is placed and cured between the outer formwork 140 and the landfill formwork 110,
When the PC concrete 150 is cured, the outer formwork 140 is demolded and the precast structure 200 is transported to the site and constructed so that they are spaced apart from each other,
As the filling concrete 160 is poured into the inner hollow part (S) so that the shear connection reinforcing bar 121 is buried, the reinforcing bar network 120 exposed to the inner hollow part (S) is precast with the filling concrete 160 A precast structure using a precast inner formwork manufactured by combining the structures 200 integrally with each other. According to claim 9,
The precast structure 200 demolded with the outer formwork 140,
An excavation hole is formed at a certain depth by trench excavation in the ground,
After placing both flanges of the precast wall structure (200a) module in contact with the excavation hole, when the wall structure connection portion (S2) is formed by both connection flanges, the reinforcing bar assembly (120a) is connected to the wall structure connection portion (S2). ) and a precast inner formwork used as a precast wall structure (200a) or a precast column structure (200b) constructed so that the precast structure (200) is continuously integrated in the ground by pouring the filling concrete (160) Precast structure using .

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