KR102375439B1 - Pc slab structure using horizontal connecting reinforcement - Google Patents

Abstract

The present invention provides a PC slab structure using horizontal joint rebar, which enables bent rebar to be pre-installed in continuously installed joint units of a PC slab to minimize installation of the additional rebar on a site, distributes vertical load applied to an upper surface unit of the PC slab to have structural stability and reduce a construction period, and has a firm joint structure of the PC slabs.

Description

PC slab structure using horizontal joint reinforcement {PC SLAB STRUCTURE USING HORIZONTAL CONNECTING REINFORCEMENT}

The present invention relates to a PC slab structure using horizontal jointed reinforcing bars, and to a PC slab structure using horizontal jointed reinforcing bars that creates a solid joint structure by connecting adjacent PC slabs using horizontal jointed reinforcing bars.

The method of constructing a concrete slab can be divided into an on-site construction method in which concrete is poured directly on the site by installing a formwork, and a PC construction method in which a PC (precast concrete) member manufactured in a factory is assembled and installed on-site. Since the on-site construction method requires a lot of manpower and time depending on the amount of on-site work, the PC construction method that can achieve standardization of members, simplification of processes, and labor productivity, etc. is attracting attention in recent years.

In the PC method, various types of PC members have been developed and used, and one of such PC members is a half PC slab. Half PC slab is a member manufactured at the factory in advance with a thickness of about half the thickness of the required slab in consideration of the lifting weight. Usually, a plurality of lower rebars are placed in parallel, and then a plurality of truss assembly reinforcing bars with upper and lower chords and lattice materials are assembled. By placing them in parallel, pour concrete in the state that they are cross-joined on the lower reinforcing bars so that the lower reinforcing bars are embedded in the concrete, while the upper part of the truss assembly reinforcing bars protrude from the concrete. Such a half PC slab is completed as a slab structure by pouring the remaining concrete at the site after lifting it at the construction site.

On the other hand, considering the overall circumstances such as transportation and lifting of half PC slabs, the width of half PC slabs is bound to be limited. There are times when you just have to install it. In this case, the butt joint between the half PC slabs is structurally weak, such as shearing or bending, so it is necessary to consider this. It can be secured by installing a reinforcing member close to the slab.

As a conventional half-PC slab joint structure, there is an example in which the bending performance of the butt joint is reinforced by adopting a conventional rebar as a reinforcing member and installing it at the butt joint of the half PC slab. In this example, the reinforcing member (reinforcing bar) is reinforced in the joint direction, but in order to secure sufficient bending performance, a sufficient installation length (installation length to secure sufficient anchoring force) of the reinforcing member (reinforcing bar) is required.

However, it is not so easy to install the reinforcing member (reinforcing bar) with a sufficient installation length. This is because interference occurs between the reinforcing member (reinforcing bar) and the truss assembly rebar of the half PC slab. In other words, the reinforcing member (reinforcing bar) is reinforced to cross the truss assembly reinforcing bar of the half PC slab. It is necessary to perform cumbersome field work in which the lattice reinforcing bars are cut one by one.

In particular, a hollow material may be installed in the half PC slab to reduce the weight of the slab. In this case, the reinforcing member (reinforcing bar) also interferes with the hollow material. This interference problem cannot but be solved by removing the hollow material at the interference location, but if the hollow material is removed, the amount of concrete pouring must be increased by that much, so the slab weight reduction effect is lowered by that much.

Most of these half PC slab joint structures can be applied to general PC slab joint structures, and the same problem occurs during the pre-production and installation of slabs. Furthermore, in the state where the PC slabs are arranged to face each other, reinforcing bars are additionally reinforced at the joint, pouring on-site concrete, and additionally performing a separate waterproofing operation to unite the PC slabs. In this case, as additional waterproofing work is carried out, the construction cost and construction period increase. As the construction quality is irregular depending on the contractor, it was difficult to secure a uniform quality of construction.

Accordingly, there is a demand for a joint structure capable of improving the joint strength of each joint and shortening the air period for a PC slab structure that is continuously installed.

Korean Patent Application No. 10-0423126 (2004.03.04.) Korean Patent Application No. 10-1899442 (2018.09.11.) Laid-Open Patent Publication No. 10-2010-0013548 (2010.02.10)

The present invention was devised to solve the above problems, and by configuring pre-refracted horizontal joint reinforcing bars at the joints of consecutively installed PC slabs, it minimizes the installation of separate reinforcing bars in the field, and acts on the upper surface of the PC slab. The purpose of this is to provide a PC slab structure using horizontal joint reinforcing bars that can reduce structural stability and time by distributing vertical load, and make the joint structure of PC slabs strong.

The PC slab structure using horizontal jointed reinforcing bars according to the present invention is a PC slab structure using horizontal jointed reinforcing bars that integrates PC slabs continuously installed with each other in the horizontal direction. a slab member provided with a first part and a second part having a thickness greater than that of the first part on the other side thereof; a slab joint reinforcing bar in which one side is embedded in the slab member so that the other side protrudes by a predetermined length from the side of the slab member, the slab reinforcing bars are disposed at intervals in the slab member; and a plurality of truss girders having a lower end embedded in the slab member and an upper end protruding from the upper surface of the slab member by a predetermined length,

The slab joint reinforcing bar is installed in the construction structure so as to come into contact with the slab member, and is disposed to extend over the second part of the other slab member provided with the first part and the second part, Concrete poured between the slab member and the other slab member It is characterized in that it is provided with a bent joint to be buried in the.

The slab joint reinforcing bar includes: a foundation buried part embedded in the interior of the slab member; and a stepped joint provided at the bent joint by being positioned higher than the foundation buried part, wherein the foundation buried part, the bent joint, and the stepped joint are bent with the foundation buried part and the stepped joint having a step difference. It forms an S-shape connected by a joint, and the bent joint protrudes from the side surface of the second part and is located at the upper end of the first part of another adjacent slab member, from the upper surface of the first part of the other slab member. It is appropriate to be separated.

The stepped joint may include a spring shape.

The present invention may further include a coupling nut connecting the stepped joint and the bent joint.

The step joint may be bent to have a horizontal wave shape.

The present invention may further include a curved support member that connects the bent joint and the stepped joint, and is in contact with the second part of the other slab member.

The present invention minimizes the installation of separate reinforcing bars in the field by configuring pre-refracted horizontal joint reinforcing bars at the joints of continuously installed PC slabs, and by distributing the vertical load acting on the upper surface of the PC slabs, structural stability and shortening of air It is possible to provide a PC slab structure using horizontal joint reinforcement, which has the advantage of making the joint structure of PC slabs strong.

1 is a plan view of a slab member of a PC slab structure using horizontal joint reinforcement according to an embodiment of the present invention.
Figure 2 is a schematic front view of the slab joint reinforcement of Figure 1 is arranged on the slab members.
3 is a cross-sectional view taken along line AA of FIG. 1 ;
Fig. 4 is a cross-sectional view taken along line BB of Fig. 1;
5 is a partially enlarged detail view of FIG. 3 ;
6 is a partially enlarged detailed view of FIG.
7 is a schematic front view of a slab joint reinforcing bar arranged on slab members according to another embodiment.
Figure 8 is a schematic front view of a slab joint reinforcing bar is disposed on the slab members according to another embodiment.
Figure 9 is a schematic front view of the slab joint reinforcement is disposed on the slab members according to another embodiment.
10 is a schematic front view of a slab joint reinforcing bar disposed on slab members according to another embodiment.

Hereinafter, it will be described in more detail with reference to preferred embodiments to which the present invention pertains.

1 to 6, the PC slab structure using horizontal joint reinforcement according to an embodiment of the present invention, slab members 100, 101, slab joint reinforcement 110, truss girder 120, combined reinforcement ( 130), and pre-blocked concrete with reinforcing bars 140.

The slab members 100 and 101 are divided into a first part 105 and a second part 106 based on a central portion. The first part 105 is formed to have a predetermined thickness, and the second part 106 is formed to have a greater thickness than the first part 105 . A predetermined inclined surface is formed between the first part 105 and the second part 106 .

The slab joint reinforcement 110 has one end embedded in the slab member 100 and 101, and the other end protrudes from one side of the slab member 100 and 101 by a predetermined length.

The slab joint reinforcing bar 110 is formed in the horizontal direction, and the foundation buried part 111 embedded in the slab member 100 and 101 and the bent joint 112 protruding to the outside of the slab member 100 and 101 are formed. ) is composed of The foundation buried part 111 is located further below the bent joint 112, and the slab joint reinforcing bar 110 has a bent structure like an S-shaped lying down.

The bent joint 112 protrudes from the side surface of the second part 106 of the slab member 100 and is located at the upper end of the first part 105 of the other slab member 101 that is installed adjacently. That is, the bent joint 112 is disposed to be spaced apart by a predetermined distance from the upper surface of the first part 105 for a bonding structure according to the concrete pouring.

The truss girder 120 is composed of a plurality and is formed in an inverted V-shape, the lower ends are embedded in the slab members 100 and 101 , and the upper ends protrude from the upper surfaces of the slab members 100 and 101 by a predetermined length. is formed The upper ends of the truss girder 120 are all positioned to form the same horizontal plane.

The slab members 100 and 101 are further configured with a coupling reinforcing bar 130 .

The coupling reinforcing bar 130 is bent in a U-shape, the lower part is embedded in the inside of the slab members 100 and 101, and the upper part is formed to protrude from the upper surface of the slab member 100 and 101 by a predetermined length.

When the cast-in-place concrete is poured on the upper side of the PC slab structure continuously installed adjacent to each other, the combined reinforcing bars 130 provide the advantage of improving the durability and improving the structural stability and lifespan of the PC slab structure.

On the other hand, inside the slab members 100 and 101, the reinforcing bar 140 in contact with the buried portion of the slab joint reinforcing bar 110 is configured.

These reinforcing reinforcing bars 140 are reinforced in the foundation buried part 111 , and are configured to be embedded in the slab members 100 and 101 . The lower end of the truss girder 120 embedded in the interior of the slab members 100 and 101 is configured to be adjacent to the upper surface of the reinforcing bar 140 .

This PC slab structure is installed so that the bent joint 112 of the slab joint reinforcing bar 110 protruding from one side of the slab member 100 is located on the upper surface of the first part 105 of the adjacent slab member 101. .

The bent joint 112 is positioned to be spaced apart from the upper surface of the first part 105 by a predetermined distance, and when the slab members 100 and 101 are connected and installed, the first reinforcing bar is located on the upper surface of the truss girder 120 . (141) is deployed. At this time, the first reinforcing rebar 141 is disposed at intervals on the inside and outside of the coupling reinforcing bar 130 , and vertically spaced apart from the first reinforcing bar 141 so that the second reinforcing bar 142 is reinforced.

On the other hand, in order to completely seal the joint between the slab members 100 and 101 installed adjacent to each other, a separate waterproofing operation is additionally performed.

When the reinforcement of the first reinforcing bar 141 and the second reinforcing bar 142 is completed as described above, the slab joint reinforcing bar 110, the truss girder 120 and the combination formed on the upper surface of the slab members 100 and 101 Construction is completed by pouring cast-in-place concrete to form a predetermined thickness so that the reinforcing bar 130 is completely embedded therein.

The other embodiments of the slab joint reinforcing bar 110 will be described in more detail as follows.

7, the slab joint reinforcing bar 110 according to another embodiment is also installed in the construction structure so that the slab members 100 and 101 are abutted and connected, and the first part 105 and the second part 106 are It is provided with a bent joint 112 that is disposed to extend on the second part 106 of the other slab member 101 and is embedded in the concrete poured between the slab member 100 and the other slab member 101 .

The slab joint reinforcement 110 is located higher than the foundation buried part 111 buried in the interior of the slab members 100 and 101, and the foundation buried part 111, and is provided in the bent joint 112. It includes a stepped joint 115 . The foundation buried part 111 , the bent joint 112 , and the stepped joint 115 have an S shape in which the foundation buried part 111 and the stepped joint 115 are connected by the bent joint 112 with a step difference. structure will be achieved.

The bent joint 112 protrudes from the side surface of the second part 106 and is located at the upper end of the first part 105 of the adjacent other slab member 101, and the first part ( 105), it is appropriate to be spaced apart from the upper surface.

On the other hand, when this step joint 115 is provided on another slab member 101 by having a spring member 151 and fixed by curing of the poured concrete, the slab members 100 and 101 are firmly connected to each other and , to provide a fixing structure that is not separated by impact or vacuum on the other slab member 101 . The spring shape of the stepped joint 115 may be formed by processing the slab joint reinforcing bar 110 by a three-dimensional bending machine.

In another embodiment, a coupling nut 155 connecting the stepped joint 115 and the bent joint 112 may be further included. That is, the spring-shaped stepped joint 115 may be manufactured in a spring shape separately from the bent joint 112 and then coupled to the bent joint 112 by the coupling nut 155 .

The coupling of the stepped joint 115 may be performed prior to installation in the construction structure of the slab members 100 and 101 or may proceed along with the construction. The spring-shaped stepped joint 115 may not be disposed on all of the bent joint 112 protruding from the side portions of the slab members 100 and 101, but may be alternately or alternately disposed two by two.

Referring to FIG. 8 , the stepped joint 115 according to another exemplary embodiment may be bent to have a horizontal wave shape. The stepped joint 115 has a horizontal wavy member 156 having a sinusoidal wave shape, and is disposed on the first part 105 of the other slab member 101 in a horizontal wave shape. Accordingly, a corrugated structure that is firmly fixed after curing of the poured concrete is made in the concrete.

Referring to FIG. 9 , the stepped joint 115 according to another embodiment connects the bent joint 112 and the stepped joint 115 to the second part 106 of the other slab member 101 . It may further include a curved support member 157 to be in contact.

The curved support member 157 is in contact with the first part 105 of the other slab member 101 to prevent sagging during the installation of the step joint 115 and the concrete pouring process, and may have a shape close to a semicircle. there is.

Referring to FIG. 10 , in another embodiment, mounting holes 161 into which the stepped joint 115 is inserted are provided, and a support plate 160 disposed on the first part 105 of the other slab member 101 . ) may be further included.

The support plate 160 is a reinforced plastic structure and may be pre-installed on the first part 105 of the other slab member 101 . Accordingly, the stepped joint 115 installed on the slab members 100 and 101 may be inserted into the support plate 160 to be installed, and the stepped joint 115 after pouring concrete is formed with the support plate 160 together with other slab members ( 101) is firmly connected.

The present embodiments as described above minimize the installation of separate reinforcing bars in the field by configuring the refracted rebars installed in advance at the joints of the continuously installed PC slabs, and distribute the vertical load acting on the upper surface of the PC slabs for structural stability And air can be shortened, and there is an advantage of making the joint structure of the PC slabs strong.

On the other hand, since the description of the technology disclosed in this specification is merely an embodiment for structural or functional description, the scope of the disclosed technology should not be construed as being limited by the embodiment described in the text. That is, since the embodiment may have various changes and may have various forms, it should be understood that the scope of the disclosed technology includes equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the disclosed technology does not mean that a specific embodiment should include all of them or only such effects, it should not be understood that the scope of the disclosed technology is limited thereby.

The singular expression is to be understood to include the plural expression unless the context clearly dictates otherwise, and terms such as "comprises" or "have" refer to the specified feature, number, step, action, component, part or these It is intended to indicate that a combination exists, and it should be understood that it does not preclude the possibility of the existence or addition of one or more other features or numbers, steps, operations, components, parts, or combinations thereof.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention as set forth in the claims below. You can do what you can do.

100, 101: slab member
105: first part 106: second part
110: slab joint reinforcement
111: foundation buried part 112: bent joint
115: step joint
120: truss girder
130: bonding reinforcing bar
140: rebar
141: first rebar 142: second rebar
151: spring member 155: coupling nut
156: horizontal corrugated member 157: curved support member
160: base plate 161: mounting hole

Claims (6)

Based on the central portion, the first part 105 is formed with a predetermined thickness on one side, and the second part 106 is formed with a thicker thickness than the first part 105 on the other side, and the first part slab members 100 and 101 in which a predetermined inclined surface is formed between the 105 and the second part 106;
A foundation buried part 111 configured at one end and buried in the interior of the slab members 100 and 101, and a bent joint configured at the other end and formed to protrude from one side of the slab member 100, 101 by a predetermined length It is composed of a part 112 and a stepped joint 115 provided in the bent joint 112, and the foundation buried part 111 is located further lower than the stepped joint 115, so that the bent joint 112 is formed. Slab joint reinforcing bars 110 formed in a shape that is bent into an S-shape connected by;
It consists of a plurality and is formed in an inverted V-shape, the lower ends are embedded in the slab members 100 and 101, and the upper ends are formed to protrude by a predetermined length from the upper surfaces of the slab members 100 and 101, and the upper end is Truss girder 120 positioned on the same horizontal line;
A coupling reinforcing bar 130 that is bent in a U-shape, the lower part is embedded in the interior of the slab member (100, 101), and the upper part is formed to protrude by a predetermined length from the upper surface of the slab member (100, 101); and
Reinforced in the foundation buried part 111, embedded in the interior of the slab member 100, 101, the truss girder 120, the upper surface adjacent to the lower end of the reinforcing bar 140; includes;
The end of the stepped joint 115 further includes a spring-shaped spring member 151 and a coupling nut 155 for connecting the bent joint 112 and the stepped joint 115,
The bent joint 112 is
It protrudes from the side of the second part 106 of the slab member 100, and is spaced apart by a predetermined distance from the upper surface of the first part 105 of the other slab member 101 that is adjacently installed,
When the slab members 100 and 101 are connected and installed, the first reinforcing bar 141 is reinforced on the upper surface of the truss girder 120 , and the first reinforcing bar 141 is spaced on the inside and outside of the coupling reinforcing bar 130 . PC slab structure using horizontal joint reinforcing bars, characterized in that the second reinforcing bars 142 spaced apart from the first reinforcing bars 141 are vertically disposed.
The method of claim 1,
The step joint 115 is
It is composed of a sine wave-shaped horizontal corrugated member 156, and is disposed in a horizontal corrugated shape on the first part 105 of the adjacent slab member 101 among the slab members 100 and 101 continuously installed. PC slab structure using jointed reinforcing bars.
The method of claim 1,
The step joint 115 is
The curved support member 157 connects the bent joint 112 and the stepped joint 115 and contacts the second part 106 of the adjacent slab member 101 among the slab members 100 and 101 that are continuously installed. ) PC slab structure using horizontal joint reinforcement, characterized in that it further comprises.
4. The method of claim 3,
The curved support member 157 is
It is in contact with the first part 105 of the adjacent slab member 101 among the slab members 100 and 101 that are continuously installed to prevent sagging during the installation of the step joint 115 and the concrete pouring process. PC slab structure using horizontal jointed reinforcing bars.
The method of claim 1,
A mounting hole 161 into which the stepped joint 115 is inserted is formed, and is disposed on the first part 105 of the adjacent slab member 101 among the continuously installed slab members 100 and 101 to provide a stepped joint. PC slab structure using horizontal joint reinforcement, characterized in that it further comprises a support plate 160 for supporting the part 115.
delete

Images