KR20180094672A - Precast Concrete(PC) deck plate having attachment and shear performance - Google Patents

Abstract

The present invention relates to a precast concrete (PC) deck plate with reinforced attachment and shear performance for a structure, to improve bonding force between a body and topping concrete. According to the present invention, the PC deck plate comprises: the body formed in a plain plate shape; and a plurality of shear connection members increasing the bonding force between the body and the topping concrete deposited on the body in a construction site, and installed to resist horizontal and vertical shear stress between the body and the topping concrete, wherein a portion of the shear connection member protrudes to the upper side of the body and the remaining portion is buried and installed inside the body. Groove parts including a contact area with the topping concrete, spaced apart from each other at a predetermined interval in the lateral direction of the body to reduce the weight of the body, and extended in the longitudinal direction of the body are formed on the upper surface of the body, wherein a relative ratio of the lateral direction of the upper side of the groove part with respect to the length of the upper surface of the body between the neighboring groove parts is greater than zero and less than 0.4, and the relative ratio of the depth length of the groove part with respect to the height length of the body is greater than zero and less than 0.5.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a PC deck plate for a structure having enhanced adhesion and shear performance,

The present invention relates to a PC deck plate for a structure having enhanced adhesion and shear performance, and more particularly, to a PC deck plate for a structure having a vertical and horizontal shear performance and an improved attachment performance, The present invention relates to a PC dish deck.

Truss girder reinforced concrete (PC) slabs were developed in Europe in the 1940s and are one of the most widely applied PC slabs in Japan, which is the most applied PC method due to its structural advantage in earthquakes. In the early 1990s, the PC construction method began to be applied to the government 's housing construction plan and industrial housing policy.

It is a slab that is widely used by all PC makers and PC makers in Korea, because the production method is relatively simple compared to the slab construction method. As the most common structure type in the PC construction method, there are underground parking lots, houses, It is widely applied in various construction industry fields such as the superstructure of civil concrete (steel) girder bridges, storage tanks, and factory plant slabs.

Recently, the PC prefabricated PC deck slab has been used as a double tee slab (Hollow core slab), etc. as a PC construction method to construct a large space building according to the demand of a long span of a building, And a PRC composite method using a half slab (Half Slab) can be cited as a PC method applied to a medium-sized building with a heavy load such as an underground parking lot .

The PRC composite method is a method of making a PC (Precast Concrete) with a reinforced concrete Rahmen structure, and PC materials such as PC columns, PC beams, and half slabs produced at the factory are transported to the site, Topping concrete is placed in the field at the junction between the members and the upper part of the half slab to integrate the structure.

On the other hand, the HCS method is a prestressed structure that improves the tensile resistance performance by applying a pre-compressive force to concrete by using a PS wire incorporating prestress as a weakness of tensile resistance which is a weak point of concrete It is mainly applied to the 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, the bending performance of the HCS member is excellent, but the vertical shear reinforcement and the horizontal shear connection member can not be installed due to the manufacturing characteristics, and therefore, there is a drawback in that the composite and shear performance must be considered. In other words, the productivity and the economical efficiency due to the automatic production are excellent. However, since it is difficult to install the vertical and horizontal shear connectors, it is necessary to rely only on the shear performance of the concrete. In order to satisfy the design load, It can be designed to be rather uneconomical.

Accordingly, a double-slab method has recently been implemented. This double-tee slab is provided with a deep reinforcing rib on a bottom plate, and a steel wire is inserted into a lower portion of the reinforcing rib to form a single member after applying tensile force. Such a double tee slab is formed by a prestressing tensile force The center part of the body of the double tee slab is formed to be raised slightly, and it is mainly applied to the ground-layered structure with a long span of about 10 m or more.

However, the double-slab method is difficult to achieve a continuous slab shape (both ends information) because it is seated only in the shape of a simple beam when the PC is straddled, which causes a problem in that the structure becomes weak due to a decrease in resistance against vertical forces such as bending and shearing force , And the dancing is increased. To improve this, the reinforcing ribs are additionally provided or the protruded height is reduced. However, the problem of cracks between the ribs and the ribs, the cost of the steel material mold, the lowering cost of the lower part,

In addition, in the 1-way frame structure in which such long span slabs are used, PC slabs can reduce the number of beams, reduce the number of columns, and reduce the number of PC members as a whole. It is possible to secure a simple workability in comparison with the frame structure. However, there is a problem that the thickness of the slab is thick, the weight is heavy, the moment is large, and the width of the slab is too large. Such a frame structure has a frame structure which is very vulnerable to seismic design. (The contents described below are added to the detailed description of the invention.)

Korean Patent Publication No. 10-2013-0028048

It is an object of the present invention to provide a PC deck plate for a structure which is pre-manufactured in a factory so that it can be installed quickly in comparison with a field installation, and has enhanced vertical and horizontal shearing performance and adhesion performance.

The present invention relates to: a body formed in the form of a flat plate; And a topping concrete disposed on the body at a construction site to improve a bonding force between the body and the topping concrete and to resist a horizontal shearing stress and a vertical shearing stress between the body and the topping concrete, And the remaining portion includes a plurality of shear connection members embedded in the interior of the body, wherein the body is provided with a plurality of shear connection members for increasing the contact area with the topping concrete and for reducing the weight of the body, Wherein the recesses are spaced apart from each other by a predetermined interval and extend along a longitudinal direction of the body, the recesses being formed on an upper surface of the body, wherein a length in the width direction of the upper side of the recessed portion with respect to a length of the upper surface of the body between the adjacent recessed portions and the recessed portion Is greater than 0 and less than 0.4, the height of the body The relative ratio of the depth length is large and provides a precast concrete deck plate for small structures than 0.5 greater than zero.

The PC deck plate for a structure having enhanced adhesion and shear performance according to the present invention has the following effects.

First, since the concave groove portion is formed on the upper surface of the body, the contact area with the topping concrete placed on the body at the construction site is increased. As a result, the adhesion between the body and the topping concrete is improved.

In particular, since the grooves are formed, the weight of the body can be reduced. Thus, it is possible to reduce the manufacturing cost of the concrete by reducing the amount of concrete used to form the body, thereby manufacturing an economical steel deck plate for a structure.

Second, by forming the shear key in the groove, it is possible to effectively resist the vertical and horizontal shear stress applied between the body and the topping concrete. Particularly, the installation of the shear connection member installed on the body can be adjusted by forming the shear key, thereby reducing the cost.

Third, it can effectively resist the vertical and horizontal shear stress by the shear key formed in the groove portion, and can be applied to a frame structure advantageous to seismic performance, and it can be applied to a form substitute according to the purpose of use.

1 is a perspective view illustrating a PC deck plate for a structure according to an embodiment of the present invention.
2 is a front view of the PC deck plate for the structure shown in FIG.
3 is a plan view of the PC deck plate for the structure shown in FIG.
Figs. 4 and 5 are a perspective view and a side view showing a shear connection member used in the PC deck plate for the structure shown in Fig.
6 is a perspective view illustrating a PC deck plate for a structure according to another embodiment of the present invention.
Figure 7 is a cross-sectional view of the PC deck plate for the structure shown in Figure 6;
8 is a perspective view illustrating a PC deck plate for a structure according to another embodiment of the present invention.
FIG. 9 is a sectional view showing an example of the construction of the PC deck plate for a structure shown in FIG. 1. FIG.
10 to 17 illustrate a process of manufacturing a PC deck plate for a structure according to the present invention.

1 to 16 show a PC deck plate for a structure and a method of manufacturing the same according to the present invention.

Hereinafter, a PC deck plate for a structure according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 to 5, a PC deck plate 100 for a structure according to an embodiment of the present invention includes a body 110 and shear connection members 150 and 155.

The body 110 is formed in the form of a flat plate. A top surface 112 spaced upward from the bottom surface 111 and a front surface 113 connecting the bottom surface 111 and the top surface 112, 114, a left side 115 and a right side 116. In the present embodiment, the body 110 is formed as a rectangular parallelepiped flat plate, but the present invention is not limited thereto.

Although not shown in the drawing, a wire mesh 20 (see FIG. 10) made of a skeleton of the body 110 is embedded in concrete in the body 110 to reinforce the strength of the body 110 . In addition to the wire mesh 20, pre-tension (stranded wire, not shown) may also be embedded. However, the pre-tension (not shown) is not an essential component and may be omitted.

When the PC deck plate 100 for construction is moved to a construction site, a topping concrete T / C is placed on the body 110 in the field so that the topping concrete T / C and the body 110 Is attached.

The body 110 is formed with a plurality of grooves 130 to reduce the weight of the body 110 while increasing the contact area with the topping concrete T / C. The plurality of grooves 130 are spaced at predetermined intervals along the width direction of the body 110 and extend from the upper surface 112 toward the lower surface 111 while extending along the longitudinal direction of the body 110 . However, the length of the groove 130 in the width direction is shortened from the upper side toward the lower side.

Referring to FIG. 2, three grooves 130 are formed in the body 110. The length E between the three grooves 130 is equally spaced. The grooves 130 are symmetrical with respect to the grooves 130 formed at the center of the body 110 in the width direction. However, since the structure as described above is limited to one embodiment of the present invention, it may vary depending on the nature of the topping concrete placed on the body 110.

The length A of the upper surface of the body 110 between the adjacent groove 130 and the groove 130 is longer than the length B in the widthwise direction of the groove 130. For example, the upper side of the length (B) in the upper widthwise direction of the groove 130 with respect to the length (A) of the upper surface of the body 110 is larger than 0 and smaller than 0.4. Preferably, when the relative ratio of the length A in the upper widthwise direction of the groove 130 to the length A of the upper surface of the body 110 is 0.2 and the length A of the upper surface of the body 110 is 500 mm, And the length B in the upper width direction of the groove portion 130 is 100 mm.

In addition, the height contrast of the depth D of the groove 130 with respect to the height C of the body 110 is greater than 0 and less than 0.5. The depth C of the body 110 is 80 mm and the depth D of the groove 130 is 30 mm and the height D of the groove 130 is about 30 mm, The relative ratio of depth (D) is 0.375.

That is, the length of the upper surface of the body 110 between the adjacent groove 130 and the groove 130 is longer than the width of the upper portion of the groove 130, and the length of the body 110 Is formed longer than the depth of the groove 130, but is formed according to the set contrast.

When the grooves 130 are formed in the body 110 according to the height of the body 110, the weight of the body 110 is reduced and the weight of the body 110, Can be prevented from being damaged. Even though the grooves 130 are formed in the body 110, the grooves 130 may have a flat plate shape as a whole.

The groove 130 is formed in an inverted triangular shape in vertical section parallel to the width direction of the body 110. Accordingly, the groove 130 includes a first inner inclined surface 131 and a second inner inclined surface 133 that are inclined downward from the tip of the upper surface 112. At this time, the end portion of the first inner inclined surface 131 and the end portion of the second inner inclined surface 133 abut each other. The first inner inclined surface 131 and the second inner inclined surface 133 of the groove 130 are formed with a plurality of recessed grooves 130 in the longitudinal direction of the groove 130 to resist vertical and horizontal shearing stress applied to the body 110, A plurality of shear keys 170 spaced apart by a predetermined interval are formed.

The shear keys 170 are formed to extend from the upper ends of the first inner inclined surface 131 and the second inner inclined surface 133 to a predetermined position along the oblique direction from the upper surface 112 of the body 110, The first inner inclined surface 131 and the second inner inclined surface 133 are formed in the shape of a polygonal cross-section. In the present embodiment, as shown in the drawing, the cross section of the first inner inclined surface 131 and the second inner inclined surface 133 is formed in a groove shape having a rectangular shape, but the present invention is not limited thereto.

Since the plurality of grooves 130 are formed in the body 110, the weight of the body 110 can be reduced, and the economical structure of the PC deck plate 100 can be manufactured. In addition, the amount of concrete used can be reduced, thereby achieving cost reduction.

The shear connecting members 150 and 155 are installed on the body 110 to resist vertical shearing stress and horizontal shearing stress applied between the body 110 and the topping concrete T / C. Also, the bonding force between the body 100 and the topping concrete T / C can be improved. A part of the shear connection members 150 and 155 protrudes upward from the body 100 and the rest of the shear connection members 150 and 155 are installed to be embedded in the body 110.

In the present embodiment, the shear connection members 150 and 155 include a truss girder 150 and a lattice bar 155. The truss girder 150 extends along a widthwise direction of the body 110 such that the truss girder 150 extends along the side edges 115 and 116 of the body 110 and the recesses 130 and 130 adjacent to the sides 115 and 116, . The lattice bar 155 is installed along a widthwise direction of the body 110 in a set central region, that is, between adjacent grooves 130. The body 110 receives less load than the set edge region. Therefore, the truss girder 150 may be installed in the set edge region where the load is heavily loaded, and the amount of the reinforcing bars may be reduced by installing the lattice bar 155 in the setting central region that receives relatively less load.

The truss girder 150 includes an upper portion 151, a lower portion 153a, 153b and a lattice bar 155 as shown in FIG. The upper side periphery 151 is a reinforcing bar extending along the longitudinal direction of the body 110. The lower portions 153a and 153b are reinforcing bars extending along the longitudinal direction of the body 110 in the same manner as the upper vicinity 151 and are separated from each other by a predetermined interval in the downward direction of the upper portion 151, (151).

The lattice bar 155 is the same as the lattice bar 155 installed in the center region of the body 110. One side of the lattice bar 155 is in contact with the upper side 151 and the other side of the lattice bar 155 is in the vicinity of the lower side 153a and 153b And is fixed while connecting the upper vicinity 151 and the lower vicinity 153a and 153b.

5, the lattice bar 155 may include a plurality of vertical reinforcing bars 155a, an upper side of one vertical reinforcing bar 155a and another adjacent vertical reinforcing bars 155a, A slanting rope 155b connecting the lower side of the reinforcing bar 155a, upper bending portions 155c connecting the upper side of one vertical reinforcing bar 155a and the upper side of one slanting rope 155B, And a lower bent portion 155d connecting the lower side of the vertical reinforcing bar 155b and the lower side of the other adjacent vertical reinforcing bar 155a. With this configuration, the lattice bar 155 is formed in a continuous 'N' shape.

When the lattice bar 155 is provided on the truss girder 150, the upper bent portion 155c is in contact with the upper vicinity 155a and the lower bent portion 155d is in contact with the lower The lattice bar 155 connects the upper vicinity 155a and the lower vicinity 155b while being in contact with the lower plate 155b.

A plurality of the truss girders 150 and the lattice bars 155 may be provided along the longitudinal direction of the body 110. In this embodiment, the truss girder 150 and the lattice bar 155 are provided along the longitudinal direction of the body 110, for example. 1, when the truss girder 150 and the lattice bars 155 are provided along the longitudinal direction of the body 110 as in the present embodiment, N 'shape of the lattice bar 155 is symmetrical with respect to the longitudinal center of the lattice bar 155.

Conventionally, a lattice bar is formed in a W-shape. The conventional W-shaped lattice bar is a preform that is automatically produced, and is bent in the same direction as the direction in which shear cracking occurs and in a direction resistant to shear cracking. However, since the same direction as the direction in which the shear cracks occur has no meaning to the shear resistance, it is inevitably limited to a spacing of 200 mm when installed on the body of the slab, which causes a problem that the shear reinforcement is excessively reinforced .

However, when the lattice bar 155 is formed in the N-shape as in the present invention, the spacing between the lattice bars 155 installed on the body 110 can be set to 200 mm or more, thereby reducing the rebar amount, reducing the manufacturing cost and reducing the welding cost. It can also have economic savings.

6 and 7 show a PC deck plate for a structure according to another embodiment of the present invention. The PC deck plate 100 'for a structure according to another embodiment of the present invention is different from the PC deck plate 100 for a structure according to the above-described embodiment only in the difference of the shear keys 170' . 6 and 7, the same reference numerals are used for the same components as those of the above-described embodiment, and the description of the same components is omitted in the following description, `).

The shear key 170` is formed to resist vertical and horizontal shearing stress applied between the body 110 and the topping concrete T / C placed on the body 110 as described above .

In the present embodiment, the shear key 170 'extends from the groove 130 to the upper surface 112 of the body 110. More specifically, the shear key 170 'has a first groove (not shown) extending from the inclined position of the first inner inclined surface 131 and the second inner inclined surface 133 to the upper surface 112 of the body 110 And a second groove 173 extending from the tip of the first groove 171 to a predetermined position along the width direction of the body 110. The shear key 170 'according to the present embodiment is formed to have a wider area than the shear keys 170 according to the above-described embodiment, and the vertical length between the body 110 and the topping concrete T / And the horizontal shear stress more strongly.

According to the present invention, since the contact area with the topping concrete formed on the body is increased by forming a groove in the body, the adhesion strength of the toppling concrete to the topping concrete can be further improved. Particularly, since the groove portion is formed with the shear key, an effect of resisting vertical and horizontal shearing stress applied between the body and the topping concrete can be obtained.

Also, since the weight of the PC deck plate for the structure is reduced due to the grooves formed in the body, the PC deck plate for an economic structure can be manufactured, and the amount of concrete used can be reduced by the groove, Cost reduction effect can be obtained.

8 shows a PC deck plate for a structure according to another embodiment of the present invention. The PC deck plate 100a for the structure according to another embodiment of the present invention is substantially the same as the PC deck plate 100` for the structure shown in FIG. The PC deck plate 100 'shown in FIG. 6 is a structure in which two truss girders 150 and two lattice bars 155 are installed on the body 110, The PC deck plate 100a is provided with four truss girders 150 on the body 110 only. The construction of each of the PC deck plates 100a for the structure shown in FIG. 8 has been described in the foregoing description and will not be described here.

FIG. 9 shows an example of construction using the PC deck plate 100 for a structure according to an embodiment of the present invention. As shown in FIG. 9, when constructing the structure, a plurality of the PCDeck plates 100 for the structure are continuously provided along the width direction. At this time, although not shown in the figure, the PC deck plate 100 for a structure is seated on a PC beam (not shown).

Corner portions connected to the upper surface 112 are chamfered on both lateral sides 115 and 116 of the body 110 of the structure PC deck plate 100. As shown in FIG. 9, when the PCD plate 100 for the structure is continuously disposed along the width direction, the right side surface 116 of one of the structure PC deck plates 100 and the other adjacent The left side surface 115 of the PC deck plate 100 for the structure is brought into close contact with each other and brought into surface contact with each other. At this time, a space formed by the chamfer between the right side surface 116 and the left side surface 115 is filled with a waterproof filler. As the waterproof filler, mortar, urethane foam or styrofoam is used.

Particularly, when the mortar is injected into the space formed by the chamfer and filled, the PC deck plates 100 for the structure are continuously arranged to form the PC deck plates 100 for the structure before the topping concrete (T / C) And adheres to it. Also, when the topping concrete (T / C) is laid, it is possible to prevent the topping concrete (T / C) from flowing out between the adjacent PC deck plates 100.

The PC deck plate for a structure according to the present invention can be used as a mold substitute in the construction of a building, a civil engineering work, a plant plant, etc., and can be applied to a seismic design structure and a frame system advantageous to an earthquake. Particularly, since the shear key is formed in the groove of the body, the distance between the front end connecting members provided on the body is widened to reduce the amount of use of the front end connecting member, thereby ensuring economical efficiency.

Hereinafter, a method of manufacturing the PC deck plate 100, 100 'for a structure according to the present invention will be described with reference to FIGS. 10 to 17.

As shown in FIG. 10, a mold 10 for manufacturing the body 110 is installed in the PCD deck plates 100 and 100 '. The mold 10 comprises a lower surface 11 and a front surface 12, a rear surface 13 and side surfaces 14 and 15 extending upward from the lower surface 11. The mold 10 has an open top surface, and concrete is poured through the top surface (not illustrated).

When the dies 10 are installed, the shear connection members 150 and 155 are installed in the dies 10 as shown in FIG. Before the shear connection members 150 and 155 are installed, wire meshes 20 for reinforcing rigidity are formed in the mold 10 while forming a skeleton of the body 110. Also, although not shown in the drawing, a pre-tension (strand) may be laid along with the wire meshes 20. When the strength of the body 110 is required to be further increased, the pre-tension (not shown) is introduced.

The wire meshes 20 are disposed inside the mold 10 while being spaced apart from each other by a predetermined distance along the longitudinal direction and the width direction of the mold 10. The shear connection members 150 and 155 are installed on the wire mesh 20.

When the wire meshes 20 and the shear connection members 150 and 155 are laid on the mold 10 as described above, the mold blocks 30 and 30 for forming the groove 130 of the body 110, `). Referring to FIG. 12, a mold block 30 for forming a groove 130 and a shear key 170 of the PC deck plate 100 for a structure according to an embodiment of the present invention is shown.

The mold block 30 includes a top surface 31 and sloping side surfaces 32a and 32b extending from both widthwise sides of the top surface 31 and sloping downward. Accordingly, the width of the mold block 30 in the width direction is shortened from the upper side toward the lower side. The ends of the oblique side surfaces 32a and 32b are mutually tangent so that the mold block 30 is formed into a triangular prism shape having an inverted triangular shape in longitudinal section parallel to the width direction. The length of the mold block 30 corresponds to the length of the mold 10.

The protrusions 35 are formed on the inclined side surfaces 32a and 32b of the mold block 30 so as to form the shear keys 170 formed in the grooves 130, respectively. The projections 35 extend from the upper surface 31 of the mold block 30 to the set positions along the oblique directions of the oblique side surfaces 32a and 32b and protrude to a set height from the oblique side surfaces 32a and 32b . In the present embodiment, the projections 35 are formed as projections having a rectangular cross section in parallel with the both side surfaces 32a and 32b. The protrusions 35 are provided on the inclined side surfaces 32a and 32b at predetermined intervals along the longitudinal direction of the mold block 30.

The mold block (30) is installed in the mold (10). When the mold blocks 30 are installed in the mold 10, the length between the upper surface of the adjacent mold block 30 and the upper surface of the mold block 30 is longer than the length of the upper surface of the mold block 30 . The upper surface length B 'of the mold block 30 with respect to the length A' between the upper surface of the mold block 30 adjacent to the mold block 30 and the upper surface of the mold block 30 is greater than 0 and equal to 0.4 Lt; / RTI > The length A 'between the upper surface of the mold block 30 and the upper surface of the mold block 30 is 500 mm when the length of the upper surface length B' of the mold block 30 is 100 mm, The upper face length B 'of the mold block 30 with respect to the length A' between the upper surface of the block 30 and the upper surface of the mold block 30 is 0.2.

The height contrast D 'of the mold block 30 with respect to the height C' of the mold 10 is greater than 0 and less than 0.5. In this embodiment, the height C 'of the mold 10 is 80 mm and the height D' of the mold block 30 is 30 mm so that the height of the mold 10 relative to the height C ' The relative ratio of the height D 'of the block 30 is 0.375.

The mold block 30 is installed in the mold 10 by a fastening member B. Holes 12a and 13a are formed on the front surface 12 and the rear surface 13 of the mold 10 so that the fastening member B can pass therethrough. A plurality of holes 12a and 13a are formed on the front surface 12 and the rear surface 13, respectively. That is, the number of the grooves 130 formed in the body 110 is equal to the number of the grooves 130 formed in the body 110.

Referring to FIG. 12, a fastening hole 32a (not shown) is formed on the front surface 32 and the rear surface (not shown) of the mold block 30 so that the fastening member B can be tightly coupled. That is, the fastening holes 32a (not shown) of the mold block 30 are arranged so as to be coaxially aligned with the holes 12a and 13a of the mold 10, and then fastened with the fastening member B The mold block 30 is fixed to the mold 10 and installed.

When the mold blocks 30 are installed in the mold 10, the top surface 31 of the mold block 30 is flush with the open top surface of the mold 10 as shown in FIG. 14 It accomplishes. As described above, after the molds 10 are installed up to the mold blocks 30, concrete is poured into the molds 10 to be cured. The body 110 is formed while the concrete is cured and the groove 130 and the shear key 170 are simultaneously formed with the body 110 by the mold block 30.

15, a mold block 30 'for forming the groove 130 and the shear key 170 of the PC deck plate 100' according to another embodiment of the present invention is shown.

The mold block 30 'includes an upper surface (not illustrated) and sloping side surfaces 32 extending from both sides in the width direction on the upper surface 31 and inclined downward. Accordingly, the length of the mold block 30 'in the width direction is shortened from the upper side toward the lower side. The tip ends of the inclined side surfaces 32 are in contact with each other, so that the mold block 30 'is formed in a triangular prism shape having an inverted triangular shape in longitudinal section parallel to the width direction.

However, the mold block 30 'according to the present embodiment further includes an upper plate 31' provided on the upper surface (not shown). The upper plate 31 'is a flat plate whose length in the width direction is longer than the width direction of the upper surface (not shown), and whose cross section is rectangular.

On the other hand, a protrusion 35 'is formed on the inclined side surface 32 of the mold block 30' to form the shear key 170 'in the groove 130. The protrusion 35 'has a first protruding surface 35'a extending in the oblique direction at an oblique direction setting position of the oblique side surface 32 and a first protruding surface 35'a extending in the top surface, and a second projection surface 35 'b extending from the tip of the mold block 30' in the width direction of the mold block 30 '. That is, the first projection surface 35 'a is in surface contact with the inclined side surface 32 and the second projection surface 35' b is in surface contact with the upper plate 31 '.

The mold block 30 'is installed in the mold 10. 16, the fastening holes are formed on the front surface 32 and the rear surface of the mold block 30 ', and the mold 10 is mounted on the front surface 12 and the rear surface 13 And the holes 12a and 13a are arranged so as to be coaxially aligned with each other and then the mold block 30 'is assembled by using the fastening member B, So that the mold block 30 'is installed in the mold 10.

17, the lower surface of the upper plate 31 'of the mold block 30' is opened to open the mold 10, as shown in FIG. 17, when the mold blocks 30 ' It forms the same surface as the top surface (unprinted). When the concrete blocks are set in the mold 10 and then the concrete is cured in the mold 10, the concrete is hardened and the body 110 and the groove 130 are cured. And the shear key 170 'are simultaneously formed.

When the PCD plate for a structure is manufactured by the manufacturing method according to the present invention, it is possible to simultaneously form the body, the groove and the shear key using the form and the mold blocks, thereby shortening the manufacturing time of the PC deck plate for the structure . Particularly, since the body is not formed first and the groove and the shear key are not formed, there is no need to impact the body to form the groove and the shear key, thereby preventing the PC deck plate for the structure from being damaged or broken.

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.

100, 100`: PC deck plate for structure
110: body 130:
150: Truss girder 155: Lattice bar
170, 170`: Shear key 10: Form
20: wire mesh 30, 30 ': rib mold
31 ': upper plate 35, 35': projection

Claims (8)

A body formed in the form of a flat plate; And
And the topping concrete is installed to resist the horizontal shear stress and the vertical shear stress between the body and the topping concrete and to partially protrude upward from the body And the remaining portion includes a plurality of shear connection members embedded in the interior of the body,
In the body,
Wherein a plurality of grooves are formed on an upper surface of the body, the grooves extending in a longitudinal direction of the body, spaced apart from each other by a predetermined interval along a width direction of the body, for increasing a contact area with the topping concrete, The height ratio of the widthwise length of the groove portion to the length of the upper surface of the body between the adjacent groove portion and the groove portion is greater than 0 and smaller than 0.4 and the ratio of the depth length of the groove portion to the height length of the body Is a PC deck plate for structures that is greater than 0 and less than 0.5. The method according to claim 1,
Wherein the groove portion includes an inner inclined surface formed to be inclined downward from an upper surface of the body,
In the groove portion,
Wherein each of the inner slopes has a plurality of shear keys spaced apart from each other along a longitudinal direction of the groove so as to resist vertical shearing stress and horizontal shearing stress applied to the body. The method of claim 2,
The above-
Wherein the inner surface of the body is formed in a shape of a groove having a polygonal shape in section parallel to the inner inclined surface, the inclined surface being formed from the upper surface of the body to a predetermined position along an inclined direction of the inner inclined surface. The method of claim 2,
The above-
A first groove formed to extend along the inclined direction from an inclined direction setting position of the inner inclined surface to an upper surface of the body, and a second groove formed on the upper surface of the body from the upper end of the first groove along a width direction of the body. And a second groove formed to be concave and extending to a position of the first deck plate. The method according to claim 1,
The shear connection member
A plurality of lattice bars installed between the grooves adjacent to the central region in the width direction of the body; And
And a plurality of truss girders provided between a side surface of the body and a groove adjacent to a side surface of the body in a widthwise set edge region of the body. The method of claim 5,
The truss girder
An upper portion extending long along the longitudinal direction of the body;
A lower portion extending along the longitudinal direction of the body and spaced apart from the upper portion by a predetermined interval and symmetrically symmetrical about the upper portion; And
And one side of the lattice bars being in contact with the vicinity of the upper side and the other side of the lattice bars being in contact with one of the lower sides and being fixed while connecting the vicinity of the upper side and one of the lower sides. The method of claim 6,
The lattice bar
A plurality of vertical reinforcing bars spaced apart from each other along a longitudinal direction of the body;
An oblique muscle connecting the upper side of one vertical reinforcing bar and the other lower adjacent vertical reinforcing bar;
An upper bending portion connecting one upper side of the vertical reinforcing bar and an upper side of the inclined roots; And
And a lower bend connecting the lower side of the inclined root and the lower one of the adjacent vertical reinforcing bars adjacent to each other, the 'N' shape being continuous. The method of claim 7,
Wherein the lattice bars and the truss girders are symmetrically arranged in the 'N' shape with respect to the longitudinal direction of the body.

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