KR101772941B1 - Precast structure using composite pc wall and method for constructing this same - Google Patents

Abstract

The present invention relates to a precast structure using a composite PC wall and a construction method for the same which obtains continuity and integrity of precast concrete half-section PC walls and prevents an accident in accordance with arrangement of a vertical reinforcing bar. According to the present invention, the precast structure using the composite PC wall is formed as a precast bridge or a precast box structure comprising: the composite PC wall; and an upper structure connected to an upper part of the composite PC wall. The composite PC wall comprises: two or more half-section PC walls installed to be continued to each other; and a concrete composite unit integrally composing the two or more half-section PC walls. The two or more half-section PC walls comprise: a half-section PC wall main body manufactured of precast concrete; and a plurality of reinforcing bars embedded to protrude to the outside of the half-section PC wall main body. According to the present invention, the construction method of the precast structure using the composite PC wall comprises: a first step of installing the half-section PC wall; a second step of constructing a foundation unit on a floor unit between the half-section PC walls; a third step of constructing the composite PC wall in which the half-section PC walls are integrally composed; and a fourth step of constructing the upper structure in the upper part of the composite PC wall constructed by the third step.

Description

TECHNICAL FIELD [0001] The present invention relates to a precast structure using a synthetic PC wall and a method of constructing the precast structure.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various precast structures such as a retaining wall, alternating, and raymen structures (bridges, underground roads, culvert boxes, etc.), and concrete foundations. More specifically, The present invention relates to a precast structure using a synthetic PC wall for securing integrity, and a construction method thereof.

The construction of general reinforced concrete structures is carried out through the process of reinforcing steel reinforcement and the installation of the formwork, concrete pouring after curing, and curing.

In addition, since the construction period is very long due to the long concrete curing time, and the reinforcing steel, especially vertical steel reinforcing steel, There is a problem that a safety accident such as a fall accident occurs.

In order to solve these problems, a precast method is used.

The precast method is a method of manufacturing a precast concrete body (segment) of a certain shape and structure by using a mold in a factory, transporting the precast segment to a construction site of the structure and assembling it on site, There is a problem in that it is very difficult to transport to the construction site because it is made of pre-cast precast wall, that is, precast concrete is entirely made of precast concrete, There is a problem in that it is difficult to construct all the precast segments so as to have continuity (alignment) when the segments are installed, so that the completed precast structure does not have continuity, and there is also a problem that external water penetrates through the precast segments The precast structure is water There is a problem that it is contaminated and damaged.

Of course, waterproofing is performed between precast segments, but waterproofing is not performed on the entire precast segment. Therefore, water penetration due to cracks in the precast segment occurs, and all precast segments can not be integrated, There is a problem that the pre-cast segments themselves and the precast segments are damaged.

These problems can be found in all precast structures such as retaining walls, alternations, bridges, underground roads and culvert boxes.

Patent No. 10-1082067 Patent No. 10-1278151 Published Japanese Patent Application No. 10-2015-0083446

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to prevent a safety accident caused by a vertical reinforcement by installing a structure by combining a precast concrete and an on- (PC wall), and to provide a precast structure using a synthetic PC wall that ensures continuity (alignment) and integrity of precast concrete segments and a construction method thereof.

The precast structure using the synthetic PC wall according to the present invention is constructed by spacing apart from each other by a certain distance, and by a synthetic PC wall including a lower base portion and an upper structure connected to the upper portion of the synthetic PC wall, Bridges or precasted box structures, wherein the composite PC walls are two or more half-section PC walls installed so as to be continuous with each other, a plurality of semi-cross-section PC walls arranged on one or more sides of the two or more half- Wherein the two or more half-sectional PC walls are integrally formed with the PC walls, wherein the two or more half-sectional PC walls are embedded in the half-cross-section PC wall body so as to protrude outside the half- And a plurality of reinforcing bars embedded in the concrete composite portion.

A method of constructing a precast structure using a synthetic PC wall according to the present invention comprises: A first step of installing a half-section PC wall at a predetermined distance from each other; A second step of constructing a base part at a bottom part between the half-sectional PC walls provided through the first step; A third step of constructing a synthetic PC wall by integrally synthesizing semi-sectional PC walls by installing a concrete structure on the exterior or interior of the half-sectional PC wall after the second step and placing the concrete in the site; And a fourth step of constructing the upper structure on the upper part of the synthetic PC wall constructed through the third step, thereby constructing the pre-cast bridge or the box structure.

The precast structure using the synthetic PC wall according to the present invention comprises two or more half-section PC walls continuously installed on one another and two or more half-section PC walls disposed on one or more sides of the two or more precast half- Wherein the two or more half-section PC walls comprise a half-cross-section PC wall body made of precast concrete, a concrete composite portion for integrally synthesizing the walls, And a plurality of reinforcement rods buried in the concrete composing part by being buried in the building.

According to the precast structure using the synthetic PC wall according to the present invention and the construction method thereof, the half-section PC wall, which is made of precast concrete so that reinforcing bars are previously laid, and the concrete composite portion, Since there is no work to reinforce the reinforcement, there is an effect of preventing a worker's safety accident occurring when the vertical reinforcement is laid.

In addition, the half-section PC wall and the concrete section are composed of smaller cross-section (semi-cross section) than the finished wall, respectively. Since only semi-section PC wall is manufactured and transported to the construction site, It has the effect of shortening the construction period because the curing period of the composite part is shorter than that of the whole field installation, and it prevents the contamination and damage of the inside of the raymen structure due to the penetration of water by the function of the concrete composite part to block the gap between the half- In addition, it has the effect of reinforcing the strength of the half - section PC walls and preventing cracks by protecting the entire outer and inner surfaces of the half - section PC walls.

Also, even if half-sided PC walls do not have continuity, the concrete composite part is constructed to have continuity so that the whole alignment of the precast structure can be ensured and high strength can be exhibited. In addition, all the half-section PC walls are integrally combined through the concrete composite part, and the precast structure is integrally moved, thereby securing the large support rigidity against the earth pressure and the ground motion, thereby enhancing the stability.

1 is a front view of a precast structure using a synthetic PC wall according to Embodiment 1 of the present invention.
2 is a plan view of a precast structure using a synthetic PC wall according to Embodiment 1 of the present invention.
3 is a perspective view of a half-section PC wall applied to a precast structure using a synthetic PC wall according to Embodiment 1 of the present invention.
4 is a view showing another example of a half-section PC wall applied to a precast structure using a synthetic PC wall according to Embodiment 1 of the present invention.
5 is a view showing a construction process of a precast structure using a synthetic PC wall according to Embodiment 1 of the present invention.
6 is a front view showing another example of a half-section PC wall applied to a precast structure using a synthetic PC wall according to Embodiment 1 of the present invention.
7 is a perspective view showing another example of a half-section PC wall applied to a precast structure using a synthetic PC wall according to Embodiment 1 of the present invention.
8 is a plan view showing another example of a half-section PC wall applied to a precast structure using a synthetic PC wall according to Embodiment 1 of the present invention.
9 is a view showing an example in which a precast structure using a synthetic PC wall according to Embodiment 1 of the present invention is applied as a bridge.
10 is a view showing an example in which a precast structure using a synthetic PC wall according to Embodiment 2 of the present invention is a retaining wall.

≪ Example 1 >

As shown in FIGS. 1 and 2, the precast structure using the synthetic PC wall according to the present embodiment includes a composite PC wall 100, a composite PC wall 100, and a composite PC wall 100 formed by combining precast concrete and on- An upper structure 200 to be installed on the upper part and a base part 300 to be installed on the bottom part of the synthetic PC wall 100.

The composite PC wall 100 comprises two or more half-section PC walls 110 as precast concrete bodies, concrete assemblies (not shown) constructed in situ to consolidate two or more preferably all half-section PC walls 110 120).

The half-section PC wall body 110 according to the present embodiment includes a half-wall PC wall body 111 made of precast concrete, a concrete composite wall 110 buried so as to protrude outside the half-wall PC wall body 111, And a plurality of reinforcing bars 112 embedded in the reinforcing bars 120.

The half-sided PC wall body 111 corresponds to the inner side of the synthetic PC wall 100 and has a cross-section of the same size in a certain section and a rigid connection to the upper structure 200 and the bottom base 300 A constitutional part may be constituted.

The reinforcing bars 112 are configured to protrude toward the outer surface of the half-section PC wall 110, that is, toward the outer concrete composition section 120. When the half-section PC wall body 111 is pre-casted, And is integrated with the half-section PC wall body 111, and is not limited to the quantity and structure shown in the drawings, but can be of any quantity and structure for solid synthesis with the concrete composite section 120.

It is preferable that the reinforcing bars 112 are arranged at a height at which the upper portion is connected to the upper structure 200 so as to be synthesized with the upper structure 200 as well as with the concrete composition portion 120.

The half-section PC wall 110 may include an upper reinforcing bar 113 and a lower reinforcing bar 114 for composing the upper structure 200 and the lower base 300, as described above.

The upper reinforcing bar 113 protrudes upward through the upper surface of the half-section PC wall body 111 and the lower reinforcing bar 114 projects laterally through the side surface of the bottom portion of the half- Of course, the half-section PC wall body 111 is pre-assembled and pre-assembled when the pre-cast is fabricated.

In addition, the half-section PC wall body 111 is constituted by one or more reinforcing bars.

The reinforcing bar receiving portion is a reinforcing through hole 115 through which the reinforcing bar 330 penetrates the reinforcing bar 330 (the most significant reinforcing bar) of the base 300.

The reinforcement 330 has an advantage of being integrated with the half-end PC wall body 111 and the concrete synthesizing part 120 by penetrating the reinforcing through hole 115 while being laid in the base part 300 have.

The reinforcing bar accommodating portion can also have a reinforcing bar insertion groove into which the reinforcing bar is inserted.

In addition, any one or more of the reinforcing through holes 115 and the reinforcing steel insertion grooves may be applied.

Two or more half-walled PC wall body bodies 111 are continuously installed along the shape of the structure. At this time, it is also possible to interlock with each other in order to prevent leakage of concrete from neighboring surfaces and to increase the order effect, On the side surface of the wall body 111, an interlocking projection (groove) for interlocking with the adjacent half wall PC body body 111 is formed.

The concrete composing part 120 corresponds to the outer wall of the half-sectional PC walls 110 and achieves the object of solving the order and the purpose of integrally combining all the half-sided PC walls 110 together.

After the installation of the half-section PC walls 110 is completed, the concrete composing unit 120 is installed by pouring concrete into a single process, that is, a separate form is installed outside the half-section PC wall 110, The concrete is installed by placing the concrete between the wall 110 and the mold, and the half-wall PC wall 110 functions as an inner mold.

The concrete composing part 120 can increase the strength as well as the synthesis with the half-section PC wall 110 by the reinforcement 112 of the half-section PC wall 110, but it is also possible to further reinforce the reinforcement.

One or more form support portions 116 (FIG. 4) may be formed in the half-end PC wall body 111 so that the formwork for constructing the concrete composite portion 120 can be easily installed and the form can not be detached when the concrete is poured.

The form support 116 is in the form of a protrusion protruding from the surface of the half-section PC wall body 111 and is preferably in the form of a concrete block integrally formed with the half-section PC wall body 111 and, of course, It is possible. The bolt type die support is characterized in that the bolt is screwed to the nut embedded in the half-end PC wall body 111, and the distance between the half-end PC wall body 111 and the die can be adjusted.

The form support portion 116 can be supported on the face of the formwork, and can be fixed to the formwork through a fixture (bolt or the like) while being supported on the formwork face.

The concrete composing part 120 can be installed by installing the half-end PC wall 110 and the girder of the upper structure 200, and then placing the wall and the upper part together.

The upper structure 200 can be implemented in various manners. For example, the upper structure 200 may include a girder 210 having both sides in the longitudinal direction supported on the top of the half-section PC wall 110, (220). The upper concrete part 220 is integrated with the concrete composite part 120 of the synthetic PC wall 100 and the upper part of the half-end PC wall 110.

The present invention also includes a lower base portion 300.

The foundation part 300 may be composed of a foundation reinforcing bar 310 and a foundation concrete part 320.

The base reinforcing bars 310 are for increasing the strength of the base portion 300 and are connected to the lower reinforcing bars 114 of the half-section PC wall 110 to form the base portion 300 and the synthetic PC wall 100, Can be increased.

The foundation concrete part 320 is poured into the bottom part between the composite PC walls 100 to form the bottom part of the structure.

The construction method of the precast structure using the synthetic PC wall according to the present embodiment is as follows.

1. Installation of half-sided PC wall.

The road surface of the site where the raymen structure is to be constructed is arranged and the half-section PC walls 110 are set up with a certain distance therebetween.

2. Construction of foundation.

After completing the installation of all the half-section PC walls 110, the foundation 300 is constructed as follows.

The base portion 300 is completed by placing the foundation reinforcing bars 310 on the floor between the half-section PC walls 110 on both sides and installing the base concrete portion 320 by placing the concrete.

The foundation reinforcing bars 310 are connected to the lower reinforcing bars 114 of the half-section PC wall 110 so that the half-section PC walls 110 and the foundation 300 on both sides are integrally combined.

3. Construction of concrete part of synthetic PC wall.

The mold 1 is installed outside the half-section PC wall 110, and the concrete mixer 120 is installed by placing the concrete. After the curing of the concrete composite part 120 is completed, the mold 1 is demolded. The mold 1 may be buried in the backfill without being demoulded, or it may be replaced by a mold without using a separate mold.

Thus, the construction of the synthetic PC wall 100 is completed.

4. Construction of superstructure.

The girder 210 of the upper structure 200 is placed on the half-section PC wall 110 and the upper concrete portion 220 is installed by pouring concrete.

As described above, this embodiment also includes the construction of the concrete composite portion 120 of the composite PC wall 100 and the upper concrete portion 220 of the upper structure 200 together by a single process.

6 to 8 show another example of the synthetic PC wall 100 in which the reinforcing bars 112 of the half-section PC wall 110 of the synthetic PC wall 100 are formed to face the inside of the raymen structure, Sectional area of the ramp structure 120. The difference in this structure is that the above-described reinforcing bars 112 are installed outside the half-section PC wall 110, It is possible to prevent the water from penetrating into the concrete mixer 120 through the concrete mixer 120. In this embodiment, even if water penetrates through the half-section PC walls 110, the concrete mixer 120 It is possible to block penetration into the inside of the raymen structure.

The method of construction in which the reinforcing bars 112 are arranged on the inside of the half-section PC wall 110 includes the steps of installing the half-wall PC walls 110 on both sides of the base portion 300 ) Construction - The process of constructing the concrete composite part (120) and the upper structure (200) by installing the concrete on the inside of the opposite side of the half-end PC walls (110) and installing the concrete in the site.

The reinforcing bars 112 are disposed only on the outer side or the inner side of the semi-sectional PC wall 110. The present invention also includes the case where the reinforcing bars are formed on both the inside and the outside of the half-sectional PC wall 110. [

FIG. 9 shows an example in which a bridge is used as a bridge, and a bottom portion of the PC wall 110 is installed through a base portion.

≪ Example 2 >

As shown in FIG. 10, the precast structure using the synthetic PC wall according to the present embodiment can be replaced with a retaining wall composed only of the synthetic PC wall 100 formed by combining the precast concrete and the concrete in situ.

That is, the above embodiment is a bridge or a box structure, and the present embodiment is a wall structure such as a retaining wall, an alternating frame, and the like.

The present embodiment is a synthetic PC wall 100 and is the same as Embodiment 1 except that it comprises two or more half-section PC walls 110 and a concrete composing portion 120, There is a difference.

Although all of the embodiments of the present invention have been described and shown as having a base portion, it is also possible to omit the base portion according to the structure and fall within the scope of the present invention.

100: synthetic PC wall, 110: half-sided PC wall
111: half-section PC wall body, 112: reinforcing bar
113: upper reinforcing bar, 114: lower reinforcing bar
115: reinforcing through hole, 116: die support
120: concrete composite part, 200: superstructure
300: foundation,

Claims (8)

A pre-cast bridge or a pre-cast type box structure by a synthetic PC wall including a base portion of a lower portion and an upper structure connected to an upper portion of the synthetic PC wall,
Wherein the synthetic PC wall is placed in a space between two or more half-sectional PC walls provided so as to be continuous with each other, between the two or more half-sectional PC walls, and between two or more molds installed on one or more sides of the two half- And a concrete synthesizing unit that synthesizes two or more half-sectional PC walls integrally and is constructed by demolding the form,
Wherein the two or more half-sectional PC walls are made of precast concrete, a plurality of reinforcing bars embedded in the concrete composite portion by being buried to protrude out of the half-sectional PC wall body, A reinforcing bar accommodating portion formed in the reinforcing bar through hole and a reinforcing bar insertion groove formed in the half-sectional PC wall body, a protrusion protruding from a face of the half-wall PC wall body opposite to the concrete combining portion, And a die support for supporting a die for the die,
Wherein the die support portion is a bolt type screw-fastened to the half-end PC wall body to adjust the distance between the half-end PC wall body and the die. Two or more half-sided PC walls that are continuously installed on each other;
Sectional half-sectional PC wall and two or more pre-cast half-cross-sectional PC walls in a space between the two or more pre-cast half-cross-sectional PC walls and between two or more molds installed on one or more sides of the half- A concrete synthesizing part constructed by demolding of the concrete;
A lower base portion,
Wherein the two or more half-sectional PC walls are made of precast concrete, a plurality of reinforcing bars embedded in the concrete composite portion by being buried to protrude out of the half-sectional PC wall body, A reinforcing bar accommodating portion formed in the reinforcing bar through hole and a reinforcing bar insertion groove formed in the half-sectional PC wall body, a protrusion protruding from a face of the half-wall PC wall body opposite to the concrete combining portion, And a die support for supporting a die for the die,
Wherein the die support portion is a bolt type screw-fastened to the half-end PC wall body to adjust the distance between the half-end PC wall body and the die. delete delete The reinforcing bar according to claim 1 or 2, wherein the reinforcing bar receiving portion is a reinforcing bar through hole penetrating through the half-sectional PC wall body, and a reinforcing bar is provided in the reinforcing bar through hole, Wherein the preform is made to protrude from both sides of the end wall of the PC wall body. A first step of installing a half-section PC wall at a predetermined distance from each other;
A second step of constructing a base part at a bottom part between the half-sectional PC walls provided through the first step;
After the second step, a mold is installed on the outside or the inside of the half-sectional PC wall, concrete is laid on the site, and concrete is cemented after the concrete is cured. A third step of constructing a wall;
And a fourth step of constructing the upper structure on the upper part of the synthetic PC wall constructed through the third step, thereby constructing a pre-cast bridge or box structure,
Wherein the half-section PC wall comprises a half-section PC wall body made of precast concrete, a plurality of reinforcing bars buried in the concrete composite portion by being buried to protrude out of the half-section PC wall body, A reinforcing bar accommodating portion of at least one of a reinforcing bar through hole and a reinforcing steel reinforcing groove formed in the PC wall body and a mold for constructing the concrete reinforcing portion as a protrusion protruding from a surface of the half- Wherein the second step comprises constructing a foundation while placing reinforcing bars in a reinforcing bar accommodating portion formed in the half-sectional PC wall,
Wherein the die support portion is bolted to the half-end PC wall body so as to adjust a distance between the half-end PC wall body and the die, and the third step includes a step of supporting the die through the die support portion of the half- And then pouring the concrete after it is supported. A first step of installing a half-section PC wall at a predetermined distance from each other;
A second step of constructing a base part at a bottom part between the half-sectional PC walls provided through the first step;
A third step of installing a girder of an upper structure on top of the half-section PC walls after the second step;
And after the third step, a mold is installed on the outside or the inside of the half-section PC wall, concrete is placed between the half-section PC wall and the mold and the upper part of the girder in the field and the mold is demolded after curing of the concrete A pre-cast bridge or a box structure is constructed including a synthetic PC wall and a superstructure in which a half-section PC walls are integrally combined,
Sectional PC wall body made of precast concrete, a plurality of reinforcing bars embedded in the concrete composite portion by being buried to protrude out of the half-sectional PC wall body, A reinforcement receiving part having at least one of a reinforcing bar through hole and a reinforcing steel insertion groove formed in the wall body and a protrusion protruding from a surface of the half-cross-section PC wall body opposite to the concrete combining part, And the second step includes the step of constructing a foundation while placing reinforcing bars in the reinforcing bars accommodating portion formed in the half-sectional PC wall,
Wherein the die support portion is bolted to the semi-sectional PC wall body so as to adjust a distance between the semi-sectional PC wall body and the die, and the fourth step includes a step of supporting the die through the die support portion of the half- And then pouring the concrete after it is supported. A first step of installing two or more half-section PC walls;
A second step of constructing a base part at a bottom part between the half-sectional PC walls provided through the first step;
After the second step, a mold is installed on the outside or the inside of the half-section PC wall, concrete is laid in the field, and after the concrete is cured, the concrete is taken out of the mold to construct a concrete composite part. And a third step of constructing a PC wall, wherein a retaining wall or an alternation is constructed,
Wherein the half-section PC wall comprises a half-section PC wall body made of precast concrete, a plurality of reinforcing bars buried in the concrete composite portion by being buried to protrude out of the half-section PC wall body, A reinforcing bar accommodating portion of at least one of a reinforcing bar through hole and a reinforcing steel reinforcing groove formed in the PC wall body and a mold for constructing the concrete reinforcing portion as a protrusion protruding from a surface of the half- Wherein the second step comprises constructing a foundation while placing reinforcing bars in a reinforcing bar accommodating portion formed in the half-sectional PC wall,
Wherein the die support portion is bolted to the half-end PC wall body so as to adjust a distance between the half-end PC wall body and the die, and the third step includes a step of supporting the die through the die support portion of the half- And then pouring the concrete after it is supported.

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