KR101594470B1 - Precast concrete slabs and constructed structures thereof - Google Patents

Precast concrete slabs and constructed structures thereof Download PDF

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Publication number
KR101594470B1
KR101594470B1 KR1020150075021A KR20150075021A KR101594470B1 KR 101594470 B1 KR101594470 B1 KR 101594470B1 KR 1020150075021 A KR1020150075021 A KR 1020150075021A KR 20150075021 A KR20150075021 A KR 20150075021A KR 101594470 B1 KR101594470 B1 KR 101594470B1
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South Korea
Prior art keywords
slab
slabs
width direction
ribs
longitudinal direction
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KR1020150075021A
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Korean (ko)
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진승영
강태성
김현수
유강종
김희석
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주식회사 네비엔
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17—Floor structures partly formed in situ
    • E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated

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  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

The present invention relates to a precast concrete slab and a combination structure thereof. The precast concrete slab of the present invention comprises: a plate unit; and, multiple first ribs extended in a longitudinal direction by being mutually distanced for a set interval in a widthwise direction on the bottom surface of the plate unit, which has main roots buried in the longitudinal direction. On both end units in a widthwise direction of the plate unit, are formed step units whose set height is lower than the top surface of the plate unit.

Description

[0001] Precast concrete slabs and their combined structures [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast concrete slab and a joining structure thereof, and more particularly, to a precast concrete slab and a joining structure thereof, which are supported on a girder for constructing a structure to prevent joint occurrence between the slabs, And a joining structure of the pre-cast concrete slab and the pre-cast concrete slab.

In general, when constructing a PL structure such as a storage tank or an underground parking lot, it is necessary to minimize a site work, a fast construction period, and a PRC mixed concrete construction method using a half PC slab ).

The PRC composite construction method is a method of converting a reinforced concrete (Rahmen) structure into a PC (Precast Concrete). The PC material, such as PC columns, PC beams, and half PC slabs, And the reinforcing concrete is placed on the upper part of the half-piece slab and the joining part between the rear members so as to integrate the structure.

In the case of constructing a structure such as an underground parking lot, recently, since the size of the vehicle has increased, sufficient parking space has been required, and a long span has been required. In the PRC composite method, the slab is designed to be short, It is in the two-directional construction because it is not suitable.

On the other hand, the HCS method is a prestressed structure that improves the tensile resistance performance by applying a compressive force to the concrete by using the PS wire introduced with the prestress as a weak point of the concrete, It is mainly applied to the ground layer structure by forming a long span of more than 10m by using a hollow slab that reduces the weight of the structure by forming hollow in the concrete section.

However, HCS requires a high-priced equipment for securing the minimum thickness due to the tensile strength of PS steel wire and the manufacturing of HCS member, resulting in an increase in unit price, and it is difficult to repair the member when cracks occur.

Accordingly, a double-slab method has recently been implemented. This is called DTS method. In the double slab, deep reinforcing ribs are provided on the bottom plate, strands are inserted into the lower portion of the reinforcing ribs, and tensile force is applied to the reinforcing ribs to form a single member. The center portion of the double plate slab is raised to a slight height, and is mainly applied to the ground layer structure with an elongation span of about 10 m or more.

However, the double tee slab method is difficult to achieve a continuous slab type (both ends information) because it is seated in a simple beam form when it is straddled by a PC beam. This is a problem that the structure becomes weak due to a decrease in resistance against vertical forces such as bending and shearing force In order to improve this, the reinforcing ribs are additionally provided or the raised height is increased. As a result, manufacturing costs such as the use of a large number of PC columns are increased, resulting in lowering economical efficiency and increasing the height of the construction structure .

Korean Patent Publication No. 10-2013-0028048

The present invention provides a precast concrete slab capable of joining slabs while preventing occurrence of joints between slabs when the slabs are continuously arranged in the width direction by being supported on the PC sheathed to construct a structure, .

According to the present invention, And a plurality of first ribs extending along the length direction and spaced apart from each other by a predetermined interval along the width direction, the first ribs having a major axis embedded along the length direction, and at both ends in the width direction of the plate portion, And a precast concrete slab extending along the longitudinal direction and having stepped portions lower in height than the upper surface of the plate portion.

The present invention relates to a method of manufacturing a metal plate having a plate portion and a plurality of first ribs spaced apart from each other by a predetermined distance along a width direction on a lower surface of the plate portion, Wherein stepped portions are formed at both ends in the width direction of the plate portion along the longitudinal direction, the height of which is lower than a height of the upper surface, symmetrical with respect to the imaginary central surface in the width direction, First slabs; And a second slab disposed between the first slabs and having a plate structure, the both ends of the first slabs being straddled by the stepped portions of the adjacent first slabs, .

According to another aspect of the present invention, there is provided a method of manufacturing a semiconductor device, the method comprising: forming step portions at both ends in the width direction along the longitudinal direction, the stepped portions being lower in height than the top surface, First slabs spaced apart from each other in the width direction; And a second slab disposed between the first slabs and having a plate structure, the both ends of the first slabs being straddled by the stepped portions of the adjacent first slabs, .

The precast concrete slab and the joining structure thereof according to the present invention have the following effects.

First, since the stepped portions are formed at both end portions in the width direction of the first slabs spaced apart from each other in the width direction, the second slabs are seated on the neighboring first slabs so that the slabs do not need to be fixed, Effect.

Second, since the second slab includes the reinforcing member or the support plate portion, deflection occurs at both ends in the longitudinal direction of the second slab due to the weight of the second slab and the weight of the overwritting concrete when the overwritting concrete is poured on the second slab The second slab and the first slab are uniformly in surface contact. As a result, joints and cracks are prevented from occurring between the first slab and the second slab, and leaked concrete can be prevented from leaking.

1 is a perspective view illustrating a first slab according to an embodiment of the present invention.
2 is a perspective view illustrating a first slab according to another embodiment of the present invention.
3 is a perspective view illustrating a second slab according to an embodiment of the present invention.
4 is a perspective view showing a second slab according to another embodiment of the present invention.
5 is a perspective view illustrating a second slab according to another embodiment of the present invention.
6 is a perspective view illustrating a second slab according to another embodiment of the present invention.
7 is a perspective view showing a second slab according to another embodiment of the present invention.
8 is a perspective view showing a second slab according to another embodiment of the present invention.
9 is a cross-sectional view illustrating a joining structure of a precast concrete slab according to an embodiment of the present invention.
10 is a cross-sectional view illustrating a coupling structure of precast concrete slabs according to another embodiment of the present invention.
11 is a cross-sectional view illustrating a coupling structure of precast concrete slabs according to still another embodiment of the present invention.
12 is a cross-sectional view illustrating a coupling structure of precast concrete slabs according to still another embodiment of the present invention.
FIG. 13 is a schematic view showing an example of construction by applying the joining structure of the precast concrete slab according to the present invention.

Figs. 1 to 13 show a coupling structure of a first slab, a second slab, and a precast concrete slab according to the present invention.

Before describing the joining structure of the precast concrete slab according to the present invention, the first slab and the second slab for performing the joining structure of the precast concrete slab according to the present invention will be described with reference to Figs. 1 to 8 do.

Referring to FIG. 1, the first slab 110 includes a plate portion 111 and a first rib 113, referring to the first slab 110. The plate portion 111 is formed in the shape of a rectangular plate as shown in FIG. The first ribs 113 are formed on the lower surface 111b of the plate portion 111 so as to be spaced apart from each other along the width direction and extend along the length direction.

The main ribs (not shown) are embedded in the longitudinal direction of the first ribs 113 and extend along the longitudinal direction of the plate portion 111 at both ends of the plate portion 111 in the width direction The stepped portions 115 having a height lower than the upper surface 111a of the plate portion 111 are formed. Meanwhile, the first ribs 113 are not limited to the main ropes (not shown) as described above, but may be embedded with pretensioners or shear connectors for joining to the topping concrete.

More specifically, the first slab 110 is formed in a rectangular plate shape by the concrete as described above. However, since the plate portion 111 is formed only in the shape of a rectangular plate, the plate portion 111 may be formed in various shapes. The first ribs 113 extend from the lower surface 111b of the plate portion 111 and are spaced apart from each other along the width direction of the plate portion 111. The first ribs 113 extend along the longitudinal direction of the plate portion 111 do.

The first slabs 110 are formed on the lower surface 111b of the plate portion 111 so that the first slabs 110 maintain a predetermined level of rigidity while reducing the weight of the first slabs 110. [ . In addition, the first slab 110 is provided with not only the main shaft (not shown) but also the front end reinforcing members 112. The front end reinforcing members 112 are installed at positions corresponding to the first ribs 113 formed on the lower surface 111b of the plate portion 111. Part of the front end reinforcing members 112 are embedded in the plate portion 111, Is installed to protrude from the upper surface (111a) of the plate portion (111). The front end reinforcing members 112 are spaced apart from each other along the longitudinal direction of the plate portion 111.

When the overwhelming concrete (not shown) is laid on the first slab 110 by installing the shear reinforcement members 112 on the first slab 110, the overwhelming concrete (not shown) 112 so that the coupling strength between the first slab 110 and the overwritting concrete (not shown) is improved.

Referring to FIG. 2, a first slab 120 according to another embodiment of the present invention is shown. The first slab 120 according to the present embodiment has substantially the same configuration as the first slab 110 according to the above-described embodiment. That is, the first slab 120 according to this embodiment also includes the plate portion 111 and the first ribs 113. Since the plate portion 111 and the first ribs 113 have the same configuration as those of the above-described embodiment, the same reference numerals are used and the detailed description is omitted.

Meanwhile, the first slab 120 according to the present embodiment further includes support portions 122 formed at both ends of the plate portion 111 in the longitudinal direction. The supporting portion 122 is formed at both ends of the plate portion 111 in the longitudinal direction and is also connected to the ends of the first ribs 113 so as to shield both longitudinal ends of the plate portion 111 . Therefore, it is formed to correspond to the length of the plate portion 111 in the width direction.

The supporting part 122 is placed on the PC beam 30 when the first slab 120 is placed on the PC beam 30 so that the supporting part 122 is supported on the PC beam 30, And serves to support the first slab 120. A plurality of shear key insertion grooves 122a are formed on the outer side surface of the support portion 122 so as to be spaced apart from each other along the width direction of the support portion 122.

3 shows a second slab 130 according to an embodiment of the present invention. The second slab 130 includes a main body 131 of a plate structure. The main body 131 is formed in a rectangular plate structure by concrete. Main bodies (not shown) extending in the longitudinal direction of the main body 131 are embedded in the main body 131 in the width direction of the main body 131.

The second slab 130 includes front-end reinforcing members 133. The front end reinforcing member 133 is disposed in correspondence with the main ropes (not shown) to be embedded in the main body 131, a part of the front end reinforcing member 133 is embedded in the main body 131, And projects to the upper surface 131a. The shear reinforcement members 133 are spaced apart from each other at predetermined intervals along the longitudinal direction of the main body 131. When the overwrite concrete is laid on the second slab 130 by the shear reinforcement members 133, The concrete adheres to the shear reinforcement members 133 to improve the bonding force between the second slab 130 and the concrete.

FIG. 4 shows a second slab 130 'according to another embodiment of the present invention. The second slab 130 'according to the present embodiment is a modified embodiment of the second slab 130 according to the above-described embodiment, and the same reference numerals are used for the same components, and a description thereof will be omitted . The second slab 130 'according to the present embodiment further includes reinforcing members 135.

Each of the reinforcing members 135 extends along the longitudinal direction of the second slab 130 '. The reinforcing members 135 are provided on the upper side of the second slab 130. The reinforcing members 135 are formed on the upper surface 131a of the second slab 130 ' 133). That is, as shown in FIG. 4, one reinforcing member 135 is connected to the front ends of the front-end reinforcing members 133 spaced apart from each other by a predetermined interval along the longitudinal direction of the second slab 130 '.

Although the reinforcing member 135 basically reinforces the rigidity of the second slab 130 ', the present invention is not limited to this, and it may be a role to induce deflection at both longitudinal ends of the second slab 130' It is also said. The reinforcing members 135 connected to the ends of the front end reinforcing members 133 tension both ends. If both end portions of the reinforcing members 135 are tensioned, the moment of moment of inertia of the second slab 130 'changes and concrete is poured on the second slab 130', the second slab 130 ' Sagging occurs at both ends in the longitudinal direction of the second slabs 130 'due to the weight of the concrete and the weight of the poured concrete. Accordingly, as described later, when both end portions in the width direction of the second slabs 130 'are seated on the stepped portions 115 of the first slabs 110 and 120, they can be uniformly in surface contact.

5 shows a second slab 130 " according to another embodiment of the present invention. The second slab 130 " according to the present embodiment is a modified embodiment of the second slab 130 ' shown in FIG. 4, and the same reference numerals are used for the same components, and a description thereof will be omitted . The reinforcing members 135 'of the second slab 130' 'according to the present embodiment have a symmetrical structure with respect to the imaginary center plane 132 in the width direction of the second slab 130' '.

In this embodiment, as shown in FIG. 5, the first reinforcing member 135a including five reinforcing members 135 'is disposed in parallel to the virtual center plane 132, and the second reinforcing member 135' The first reinforcing members 135b are mutually symmetrical with respect to the imaginary center plane 132 and the third reinforcing members 135c are mutually opposed with respect to the imaginary center plane 132. [

The lengths of the reinforcing members 135 'symmetrical with respect to the virtual center plane 132 are the same. However, the reinforcing members 135 'are formed so as to have the same or gradually longer length from the imaginary central plane 132 toward the widthwise ends of the second slab 130' '. In this embodiment, referring to FIG. 5, the length gradually increases from the first reinforcing member 135a toward the third reinforcing member 135c.

The reinforcing members 135 'also reinforce the rigidity of the second slab 130' ', but are not limited thereto, and guide the sag at both longitudinal ends of the second slab 130' '. The reinforcing members 135 'of the second slab 130' 'according to the present embodiment also tension both ends. The second slab 130 '' according to the present embodiment has various lengths of the reinforcing members 135 'so that the second moment of inertia of the second slab 130' can be varied.

6 shows a second slab 140 according to another embodiment of the present invention. The second slab 140 is a modified embodiment of the second slab 130 shown in FIG. 3, and the same reference numerals are used for the same components, and a description thereof will be omitted.

The second slab 140 according to the present embodiment has support plate portions 141 formed at both ends in the longitudinal direction. The support plate portion 141 extends from both longitudinal ends of the second slab 140 and is inclined downward. The support plate portion 141 includes support plate members (not shown) corresponding to the support plate portions 141 at both ends of the body 131 when the second slab 140 is manufactured, I put it. Therefore, the support plate portion 141 is formed integrally with the body 131. [

The second slab 140 may have the support plate 141 at both ends in the longitudinal direction so that when the second slab 140 is seated on the PC beam 30, And the second slab 140 is supported by the upper surface of the PC beam 30 to support the second slab 140.

However, the support plate portion 141 is not limited to the role of supporting the second slab 140, but also serves to induce sagging at both longitudinal ends of the second slab 140. When the overwritting concrete is placed on the second slab 140, deflection occurs due to the weight of both ends of the second slab 140. A front end key insertion groove 141a is formed on the outer side surface of the support plate 141 so that a shear key (not shown) coupled to the first slab 120 can be inserted.

The second slab 140 further includes a reinforcing rib 143 extending from the lower surface of the body 131 to the inside of the support plate 141. The reinforcing ribs 143 may be formed in various shapes. In the present embodiment, the reinforcing ribs 143 having a triangular cross-section are formed. The support plate 141 formed to be inclined downward at both ends in the longitudinal direction of the second slab 140 may be damaged or damaged by an external impact or an external force. As the reinforcing rib 143 is formed, It is possible to prevent the support plate portion 141 from being damaged or damaged even if an external impact or an external force is applied to the support plate portion 141 by reinforcing the rigidity of the support portion 141.

7 shows a second slab 140 'according to another embodiment of the present invention. Like the second slab 130 shown in FIG. 3, the second slab 140 'has a plate body 131 and a support plate 141 at both longitudinal ends of the body 131 . The second slabs 140 'also have hooks 145 extending from both ends of the body 141 in the width direction. When the second slabs 140 'are seated between the neighboring first slabs 110 and 120 as described later, the engagement protrusions 145 are formed in the stepped portions of the first slabs 110 and 120, As shown in FIG. Therefore, the height of the latching protrusion 145 is equal to the height of the stepped portion 115.

One side of the support plate 141 is formed to be in contact with one side of the support portion 122 of the first slab 120. 12, when the second slab 140 'is disposed between the first slabs 120, the support portion 122 and the support plate 141 are combined with each other, Thereby preventing a gap from being generated between the first slab 120 and the second slab 140 '. In addition, a shear key insertion groove (not shown) is formed on the outer side of the support plate 141 of the second slab 140 'according to the present embodiment so that a shear key (not shown) coupled with the second slab 140' .

Although the second slab 140 'according to the present embodiment is not shown in the drawing, the second slab 140' is spaced apart from the bottom of the body 131 along the width direction of the body 131, Ribs (not shown) extending along the longitudinal direction of the support plate 141 and connecting both ends to the support plate 141 are formed.

8 shows a second slab 150 according to another embodiment of the present invention. The second slab 150 according to the present embodiment includes a body 151 having a plate structure. Second ribs 153 spaced apart from each other along the width direction of the body 151 are formed on a lower surface 151b of the body 151. [ The second ribs 153 are elongated along the longitudinal direction of the body 151. The second slab 150 includes a main frame (not shown), and the main frame (not shown) is embedded in the longitudinal direction of the second ribs 153.

The second slab 150 includes the second ribs 153 to reduce the weight of the second slab 150 and maintain a predetermined rigidity. The pitch of the second ribs 153 is equal to the pitch of the first ribs 113 of the first slab 110. Therefore, when the second slabs 150 are sandwiched between the neighboring first slabs 110, the first slabs 110 and the second slabs 150, The first ribs 113 and the second ribs 153 are spaced at the same pitch length.

The second slab 150 also includes latching jaws 155 similar to the second slab 140 'shown in FIG. The latching protrusions 155 extend from both ends of the body 151. The latching protrusions 155 are formed to have the same length as the length of the body 151. The latching protrusions 155 are formed so as to overlap the stepped portions 115 when the second slabs 150 are disposed between the neighboring first slabs 110 and 120. Therefore, when the second slab 150 is seated between the adjacent first slabs 110 and 120, the height of the first slab 150 is equal to the height of the stepped portion 115, The upper surface 111a of the slabs 110 and 120 and the upper surface 151a of the second slab 150 are uniform.

The length of the locking protrusions 155 in the width direction is set such that when the second slabs 150 are seated between the first slabs 110, 1 ribs 113 are formed so as to be equal to the pitch lengths of the first ribs 113 and the pitch lengths of the second ribs 153.

The coupling structure of the precast concrete slab by the first slab and the second slab according to the present invention as described above will now be described with reference to FIG. 9 through FIG.

First, the joining structure of the precast concrete slab according to the embodiment of FIG. 9 includes the first slabs 110 and the second slabs 130. The first slabs 110 are spaced apart from each other in the width direction, and the second slabs 130 are disposed between the first slabs 110. The second slabs 130 are seated while being straddled by the stepped portions 115 formed at both ends of the first slabs 110 in the width direction.

The first slab 110 on the left side and the first slab 110 on the right side facing each other by the second slab 130 placed on the first slabs 110, Are the same as the pitch lengths of the first ribs 113. The distance between the first ribs 113 of the first slabs 110 which are adjacent to each other in the width direction of the first slabs 110 is smaller than the distance between the first ribs 113 of the first slabs 110, And is formed to be equal to the pitch length of the first ribs 113.

Since the coupling structure of the precast concrete slab is such that the second slab 130 is simply placed on the stepped portion 115 formed on the first slab 110, It is not necessary to join or fix the second slabs 130, and the construction period can be shortened.

The coupling structure of the precast concrete slab according to another embodiment with reference to FIG. 10 includes first slabs 110 and second slabs 150. The first slabs 110 are spaced apart from each other in the width direction, and the second slabs 130 are disposed between the first slabs 110. At both end portions of the second slab 150 in the width direction, locking tabs 155 are formed so that the locking tabs 155 are engaged with the stepped portions 115 formed at both widthwise ends of the first slabs 110 It stays as it is hanging.

The length of the pitch of the first ribs 113 relative to the entirety of the first slabs 110 and the second slabs 150 in the combined structure of the precast concrete slabs according to the present embodiment, 153 and the length of the pitch between the first rib 113 and the second rib 153 facing each other are all the same. 10, the spacing between the first ribs 113 and the second ribs 153 in the coupled structure of the first slabs 110 and the second slabs 150 is All are the same.

Although not shown in the drawing, the coupling structure of the precast concrete slab may include the second slabs 130 ', 130 ", and 140 mounted between the first slabs 110. The second slabs 130 ', 130 ", and 140 may be formed of the second slabs 130', 130", and 140 when the overwritting concrete is poured by the reinforcing members 135 and 135 ' So that the surface contact with the first slab 110 is guided to be uniform. Therefore, it is possible to prevent joints and cracks from occurring between the first slabs 110 and the second slabs 130 ', 130 ", 140 and prevent the overburden concrete from leaking.

The coupling structure of the precast concrete slab according to another embodiment with reference to FIG. 11 includes the first slabs 120 and the second slab 130 '. The first slabs 120 are also spaced apart from each other in the width direction, and the second slabs 130 'are disposed between the first slabs 120.

The widthwise ends of the second slab 130 are straddled by the stepped portions 115 formed at both widthwise ends of the first slab 120 so that the second slab 130 ' (Not shown). The reinforcing member 135 of the second slab 130` may cause the second concrete slab 130` to be inserted into the first slabs 120 and the second slab 130 ' Is deflected due to the weight of the second slab 130 'and the weight of the overburden concrete.

The widthwise ends of the second slabs 130 are uniformly in contact with the stepped portions 115 of the first slabs 120 so that the first slabs 120 and the second slabs 120 ' 130 ' to prevent joints and cracks from occurring and to prevent the overburden concrete from leaking.

The coupling structure of the precast concrete slab according to another embodiment with reference to FIG. 12 includes the first slabs 120 and the second slab 140 '. Also in this embodiment, the second slabs 140 'are disposed between the first slabs 120 arranged to be spaced apart from each other in the width direction. The engaging protrusions 145 formed at both ends of the second slab 140 in the width direction are stuck on the stepped portion 115 of the first slab 120 so that the second slab 140 ' 1 < / RTI > Since the first slabs 120 and the second slabs 140 'are not structured as shown in FIGS. 2 and 7, the joint structure of the precast concrete slabs according to the present embodiment is large It can be used when constructing a floor or ceiling of a structure requiring rigidity.

FIG. 13 shows an example in which the joining structure of the precast concrete according to the present invention is applied. Referring to FIG. 13, a PC beam 30 is disposed on a PC column 10 serving as a column of a structure. On the PC beam 30, the first slab 120 and the second slab 140 'intersect and are continuously disposed along the horizontal direction.

13, the supporting portion 122 of the first slab 120 is stuck on the PC beam 30 so that the first slab 120 is seated on the PC beam 30, do. The second slab 140 'is also seated on the PC beam 30 by a support plate portion (not shown) in the same manner as the first slab 120. At this time, the second slab 140 'is inserted into the stepped portion 115 of the first slab 120 so that the first slab 120 and the second slab 140' ) Are combined.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

110, 120: first slab 111, 121: plate portion
113, 123: first ribs 115: stepped portions
130, 130, 140, 140, 150; The second slab
131, 141, 151: body 133: shear reinforcement member
135: reinforcing member 141: support plate portion
143: reinforcing rib 145:
153: second rib 155: latching jaw

Claims (18)

delete delete And a plurality of first ribs spaced from each other by a predetermined interval along the width direction and extending along the longitudinal direction, wherein the main ribs are embedded in the longitudinal direction of each first rib, and the width of the plate portion Wherein the first slabs extend along the longitudinal direction and have stepped portions lower in height than the top surface and have a symmetrical structure with respect to imaginary central planes in the width direction, field; And
And a second slab disposed between the first slabs, the second slab having a body of a plate structure, both ends of which are straddled by the stepped portions of the adjacent first slabs,
Wherein the first slab comprises:
And a slab extending downward at both ends in the longitudinal direction of the plate portion, the slab supporting the first slab when the first slab is seated on the PC beam, the slab gradually becoming narrower from the upper side toward the lower side, Further comprising:
The second slab may include:
Wherein the second slab extends in a downward slope from both ends in the longitudinal direction of the main body and has a width gradually widened from the upper side toward the lower side so that when the second slab is seated on the PC beam, Further comprising a support plate portion that is formed with the support portion when the second slab is disposed between the first slabs,
Wherein an outer side surface of the support portion and an outer side surface of the support plate form a coplanar surface when the first slab and the second slab are seated on the PC beam. The method of claim 3,
The second slab may include:
Wherein the shear reinforcement members are partially embedded in the concrete and some of the shear reinforcement members are protruded to the upper surface and spaced along the width direction and the longitudinal direction of the second slab. The method of claim 4,
Wherein a length in the width direction of the second slab is formed such that a spacing distance between neighboring first slabs corresponds to a pitch length between the first ribs of the first slab. The method of claim 4,
The second slab may include:
And reinforcing members connecting the shear reinforcement members in the longitudinal direction,
Wherein the reinforcing members reinforce the rigidity of the second slab when the overwritting concrete is laid on the second slab. The method of claim 6,
Wherein the reinforcing members are symmetrical with respect to a virtual center plane in the second slab width direction,
The length of the reinforcing members symmetrical is equal to the length of the second slab, and the length of the reinforcing members is equal or gradually increased toward the width direction end with respect to the imaginary central plane in the width direction of the second slab, Lt; / RTI > The method of claim 4,
The second slab may include:
A plurality of second ribs spaced apart from each other by a predetermined interval along the width direction on the underside, extending along the length direction and having a main winding embedded in the lengthwise direction; And
And engaging jaws extending from both ends in the width direction and formed so as to straddle the step of the first slab when the second slab is seated between the neighboring first slabs. . The method of claim 8,
Wherein the first ribs and the second ribs are spaced by the same pitch length with respect to the first slabs and the second slabs. The method of claim 3,
The second slab may include:
And a reinforcing rib extending from the lower surface of the second slab to the inside of the support plate portion and reinforcing the support plate portion. delete delete delete delete delete delete delete delete
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CN109667376A (en) * 2019-01-29 2019-04-23 天津城建大学 Novel superposed superstructure and its construction method suitable for steel construction H profile steel beam
KR101987327B1 (en) 2017-12-13 2019-06-11 한국건설기술연구원 Method for manufacturing hollow precast concrete structure with large cross-section using rubber tube mold of composite cross-section
CN112171884A (en) * 2020-09-02 2021-01-05 中国建筑上海设计研究院有限公司 Prefabricated ribbed concrete composite slab and preparation method thereof
KR102487497B1 (en) * 2022-09-30 2023-01-10 유광종 Bridge deck construction structure and method using a precast deck

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KR101713632B1 (en) * 2016-05-31 2017-03-08 (주)까뮤이앤씨 Precast Concrete Hollow Core Slab And Manufacturing Method For Thereof
KR101693256B1 (en) * 2016-08-04 2017-01-05 주식회사 노빌테크 Construction method of prefabricated psc bridge
KR101987327B1 (en) 2017-12-13 2019-06-11 한국건설기술연구원 Method for manufacturing hollow precast concrete structure with large cross-section using rubber tube mold of composite cross-section
CN109667376A (en) * 2019-01-29 2019-04-23 天津城建大学 Novel superposed superstructure and its construction method suitable for steel construction H profile steel beam
CN109667376B (en) * 2019-01-29 2024-04-26 天津城建大学 Novel superposed floor system suitable for H-shaped steel beam of steel structure and construction method thereof
CN112171884A (en) * 2020-09-02 2021-01-05 中国建筑上海设计研究院有限公司 Prefabricated ribbed concrete composite slab and preparation method thereof
KR102487497B1 (en) * 2022-09-30 2023-01-10 유광종 Bridge deck construction structure and method using a precast deck
KR102487499B1 (en) * 2022-09-30 2023-01-10 유광종 Bridge deck construction structure and method using a precast deck set

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