KR101721603B1 - Deck for concrete slab construction - Google Patents

Abstract

The present invention relates to a deck for concrete slab construction. The present invention can stably prevent a reflection crack from being generated from a butt joint portion after pouring concrete on the upper surface of the deck. To this end, according to the present invention, a deck for concrete slab construction comprises a deck body, a protruding body, a transverse reinforcing steel bar, and a longitudinal reinforcing steel bar.

Description

Deck for Concrete Slab Placing {DECK FOR CONCRETE SLAB CONSTRUCTION}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deck for pouring concrete slabs, and more particularly, to a deck for pouring concrete slabs, and more particularly to a buckling buckling deck which is vertically or inclinedly protruded, It is possible to reinforce the rigidity of the joint between the decks by placing the concrete on the upper surface of the deck by bending the deck side in the field so that the reflection cracks from the joints after the concrete is placed on the upper surface of the deck, And also to prevent the occurrence of reflection cracks, thereby prolonging the life of the concrete slab structure, thereby making it possible to prolong the period of maintenance and re-work of the concrete slab structure after the construction.

Generally, the structure of bridges is composed of a plurality of bridge piers installed at regular intervals and a pair of girders arranged in parallel horizontally at regular intervals between the upper surfaces of adjacent bridge piers, and between adjacent girders A cross beam formed at regular intervals in an orthogonal direction, and a slab disposed at an upper portion of the girder.

The above-described girders are constructed so as to withstand the stresses caused by the vertical pressure such as the weight and the weight of the slab by incorporating reinforcing bars or steel wires.

In addition, in order to construct a slab corresponding to the upper work of the bridge, the concrete is laid on the upper part of the slab with the formwork installed between the girders, and after curing, the form is dismantled. When the slab on the bridge is to be constructed, there is a problem in that the slab concrete is cured by installing a formwork and a foot plate, and then the formwork used in the concrete is removed.

Therefore, in recent years, a panel replacing the slab formwork has been used in order to improve the workability and to improve the work efficiency by shortening the air in order to solve the above-mentioned problems. Such a panel is a concrete slab casting deck for constructing a panel by constructing a truss girder protruding to a top surface of a deck and a reinforcing bar in a lattice inside the deck, and then curing and curing the concrete.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front sectional view showing a construction state of a concrete slab placing deck according to the prior art; FIG.

As shown in FIG. 1, a concrete slab laying deck 10 according to the prior art has a front end and a rear end which are fixedly seated on an upper surface of a girder (not shown) , A truss girder (13) longitudinally installed at regular intervals so that a part of the truss girder (13) is exposed on the upper surface, a transverse reinforcing bar (14) installed in a transverse direction perpendicular to the longitudinal direction of the truss girder (13) A longitudinal reinforcing bar 15 orthogonal to the reinforcing bar 14 and longitudinally oriented like the truss girder 13 and a deck main body 11 forming a plate panel through curing by the placement of concrete .

At this time, a reinforcing rib 11a protrudes from a lower portion of the deck main body 11, which is a lower side of the truss girder 13. [

Of course, although not specifically shown in the drawing, the deck body 11 may be provided in a flat type without the reinforcing ribs 11a.

The concrete slab placing deck 10 having the structure in which the reinforcing ribs 11a protrude from the lower portion of the deck main body 11 under the truss girder 13 as described above, The longitudinal reinforcing steel bars 15 are also longitudinally oriented in the longitudinal direction of the reinforcing ribs 11a.

The concrete slab placing deck 10 according to the related art constructed as described above is arranged on the upper surface of the girder which is fixed on the upper portion of the bridge pier and fixed by pouring the concrete.

1, when a panel, that is, a concrete slab laying deck 10 is applied to a civil engineering slab structure, a synthetic structure including an upside of an upper concrete including a deck 10 is integrally formed as an effective section E).

The portion of the deck 10 where the deck 10 and the deck 10 contact each other is separated by a substantially constant gap and is in the form of a sectional reduction with a partial sectional loss L, (E) reduced in cross sectional loss (L) at the butted joint portion which is brought into contact with each other.

Therefore, when the deck 10 and the deck 10 are in contact with each other, the cross section of the deck 10 is reduced to an effective cross section e, which is weak to tensile force. There is a problem that reflection cracks are generated in succession.

And there is a problem that the durability of the concrete slab structure is remarkably deteriorated due to the occurrence of such reflection cracks.

Furthermore, due to the reflection cracks occurring in the concrete slab structure, the excellent penetration of dirt, calcium chloride and the like accelerates the corrosion of the inner reinforcing steel, accelerates the deterioration of the concrete slab structure to shorten the life of the bridge, Maintenance and repair of concrete slab structures are required.

Therefore, it is possible to stably prevent the occurrence of reflection cracks extending from the butt portion of the deck body to the upper portion by reinforcing the butt joint portion of the adjacent deck body after pouring concrete on the upper surface of the deck, thereby extending the life of the concrete slab structure It is required to research and develop a deck for paving large slabs, which is capable of prolonging the period of maintenance and re-operation of the concrete slab structure after construction.

Registered Korean Patent No. 1014570 Registered on Feb. 08, 2011.

In order to solve the above-mentioned problems, the present invention is characterized in that a joint reinforcing steel bar is vertically or slantly protruded so as to be partially exposed at a predetermined interval in the longitudinal direction on the side slope of the deck body, It is possible to reinforce the rigidity of the joint between the decks by placing the concrete on the upper surface of the deck, thereby preventing the occurrence of reflection cracks from the joints after the concrete is placed on the upper surface of the deck The present invention also provides a deck for pouring concrete slabs.

In addition, the technique according to the present invention extends the service life of the concrete slab structure by preventing the occurrence of reflection cracks by applying the joint reinforcing bars, thereby prolonging the period of maintenance and re-working of the concrete slab structure after the construction, There is a purpose.

The present invention for achieving the above-mentioned objects is as follows. That is, the deck for pouring a concrete slab according to the present invention includes a deck main body having a front end and a rear end seated and fixed on the upper surface of a girder arranged and fixed at a predetermined interval on an upper part of a pier, A protruding body disposed at a predetermined distance in the lateral direction so as to partially expose the deck body and extending in the longitudinal direction, a transverse reinforcement member embedded in the center of the deck body and provided in a lateral direction orthogonal to the longitudinal direction of the protruding body A concrete slab pouring deck comprising a reinforcing bar and a longitudinal reinforcing bar orthogonally intersecting with the transverse reinforcing steel and longitudinally oriented like the protruding body, characterized in that the concrete slab pouring deck is constructed by placing the concrete slab adjacent in the lateral direction after the construction of the concrete slab Due to the localized reduction of the section at the butt joint between the decks, And a joint reinforcing bar formed on the side slope of the deck body so as to protrude at a predetermined interval in the upward longitudinal direction so as to partially expose the deck main body so as to prevent cracks caused by stresses applied to the deck body.

The joint reinforcing bars are formed on the side slopes of the deck body so as to protrude at a predetermined distance in the upward longitudinal direction so as to be partially exposed and the bending protrusions protruding from the side slopes of the deck body are bent into a trapezoidal shape desirable.

At this time, the joint reinforcing bars are protruded from opposite side sloping surfaces of the deck body, while the decks for placing concrete slabs are seated on the girders so as to be adjacent to each other, The bending protrusion formed on one side slope of one side with respect to the main body and the bending protrusion formed protruding from the side slope of the other side of the deck body of the adjacent one of the piles for plowing concrete slab are bent downward So that the deck body is protruded symmetrically with respect to the left and right direction so that the deck body is overlapped and bent downward while abutting against each other.

Also, the joint reinforcing bars may be formed on both side sloping surfaces of the deck body, while the concrete slab placing decks may be seated on the girders so as to be adjacent to each other, and then the decks of any one concrete slab placing deck The bending protrusion formed on one side slope of one side with respect to the main body and the bending protrusion formed protruding from the side slope of the other side of the deck body of the adjacent one of the piles for plowing concrete slab are bent downward In the left and right direction of the deck body so as to be bent downward so as to be staggered in the horizontal direction relative to each other.

Further, the joint reinforcing bars may be formed such that the bending protrusions are respectively protruded from both side sloping surfaces of the deck body, and the bending protrusions are formed at any one point from the upper end of each side slope of the deck body to the lower end of the deck body, It is preferable that the protrusions are formed so as to protrude vertically upward and a predetermined length perpendicular to the line.

The deck main body may have protruding bending projections formed on both side sloping surfaces of the deck body. The bending protruding portions may be formed at any one point from an upper end of each side slope of the deck body to a lower end thereof, As shown in Fig.

And the projecting body can be applied as a truss girder.

In addition, the protruding body may be applied as a bending stone work or an upright stone work.

Further, the joint reinforcing steel bars are protruded from the deck body at a predetermined interval in the up-and-down direction at a predetermined interval so as to be partially exposed, and the bending protruding portions protruding from the side inclined surfaces of the deck body are formed into a mountain- It can be bent.

The joint reinforcing bars are formed on the side inclined surfaces of the deck body so as to be partially exposed in the upward longitudinal direction with a predetermined gap therebetween. The bending protruding portions protruding from the side inclined surfaces of the deck body are round- As shown in Fig.

The deck for pouring concrete slabs according to the present invention may further include a plurality of reinforcing ribs extending in the longitudinal direction and protruding downward at a predetermined interval in the lateral direction of the lower portion of the deck body.

The joint reinforcing bars may protrude from the deck body at a predetermined distance in the up-and-down direction at predetermined intervals in the longitudinal direction of the deck body. A portion of the deck body protruding from the side inclined surface may be formed as a wire mesh type .

The effect of the concrete slab placing deck according to the present invention will be described below.

First, on the side slope of the deck main body, a joint reinforcing bar protruding vertically or slopingly so as to expose a part at a predetermined interval in the longitudinal direction is applied, and the concrete is bent on the deck side so that the deck side is bent. It is possible to reinforce the rigidity with respect to the abutting joint between the decks after the pouring, and thus it is possible to stably prevent the occurrence of the reflection crack from the abutting joint after the concrete is placed on the upper surface of the deck.

Second, it is possible to extend the life span of concrete slab structure by preventing the occurrence of reflection cracks by applying joint reinforcing bars, thereby prolonging the period of maintenance and re - working of concrete slab structure after construction.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front sectional view showing a construction state of a concrete slab placing deck according to the prior art; FIG.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete slab,
3 is a front sectional view showing a deck for pouring a concrete slab according to the present invention;
FIG. 4 is a front sectional view showing a construction state of a concrete slab placing deck according to the present invention; FIG.
Figures 5 and 6 illustrate plan views of the use of a concrete slab installation deck according to the present invention.
FIG. 7 is an exemplary view showing embodiments of a joint reinforcing steel bar which is a substantial part of a concrete slab placing deck according to the present invention. FIG.
Fig. 8 and Fig. 9 are views showing other embodiments of the projecting body which is the main part of the concrete slab placing deck according to the present invention. Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a concrete slab installation deck according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a perspective view showing a deck for pouring a concrete slab according to the present invention, and FIG. 3 is a front sectional view showing a deck for pouring a concrete slab according to the present invention.

FIG. 4 is a front sectional view showing a construction state of a deck for pouring a concrete slab according to the present invention, and FIGS. 5 and 6 are plan views illustrating a state of use of a deck for pouring concrete slab according to the present invention.

FIG. 7 is an exemplary view showing embodiments of a joint reinforcing steel bar which is a substantial part of a deck for pouring a concrete slab according to the present invention.

2 to 7, a deck 100 for pouring concrete slabs according to a preferred embodiment of the present invention includes sheaves (not shown) on the upper surface of a girder (not shown) So that the rear end is fixedly seated.

Although not shown in detail, the bridge (not shown) and the girder (not shown) are applied at the time of constructing a bridge slab by installing concrete in a conventional bridge construction. Particularly, the girder And the front and rear ends of the concrete slab placing deck 100 are seated and fixed between girders (not shown).

The deck 100 for pouring concrete slab according to the present invention includes deck body 110, protruding body, transverse reinforcing steel 140 and longitudinal reinforcing steel 150 .

Here, the deck body 110 is formed by placing the front and rear ends of the deck main body 110 on the upper surface of the girder, which are arranged and fixed at regular intervals on the upper part of the pier, and by pouring concrete.

The protrusions are arranged at predetermined intervals in the lateral direction so as to partially expose the upper portion of the deck body 110, and extend in the longitudinal direction.

The truss girder 130 may be formed in a triangular shape such that the base wire 131 is disposed on the truss girder 130 and the triangle shape of the base wire 131 It is preferable that the lattice bar 132 formed to extend in a zigzag fashion up and down is fixed to each of the hypotenuse portions.

Of course, the protruding body may be provided as a bending stone work 130 'or an upright stone work 130', which will be described later. A detailed description of the bending stone work 130 'or the upright stone work 130' Will be described later with reference to Figs. 8 and 9.

Meanwhile, the transverse direction reinforcing bars 140 are embedded in the center of the deck body 110 and are installed in a transverse direction orthogonal to the longitudinal direction of the protruding bodies.

In addition, the longitudinal reinforcing steel bars 150 are orthogonally intersected with the transverse reinforcing bars 140 and are longitudinally oriented like the protrusions.

In addition, in the deck 100 for pouring concrete slabs according to the present invention as described above, the deck main body 110 is disposed at a predetermined distance in the lateral direction of the lower part, And a reinforcing rib 111 which is formed on the inner surface of the reinforcing rib 111.

In other words, the deck body 110 is a flat plate type and can be constructed without the reinforcing ribs 111, and may further include the reinforcing ribs 111.

Although the deck body 110 is not shown in detail in the drawings, the deck body 110 may have a plurality of longitudinally spaced longitudinally extending longitudinally extending longitudinally extending hatches haunch type.

Meanwhile, the deck 100 for pouring concrete slabs according to the present invention having the above-described structure is particularly suitable for the concrete pavement deck 100, which is located adjacent to the concrete slabs laterally after the construction of the concrete slab, To prevent cracks due to the stress applied to the upper portion of the concrete slab due to the reduction of the cross-section of the slab, and to prevent reflection cracks such as cracks extending to reach the upper surface of the completed bridge slab due to such cracks .

The deck 100 for pouring the concrete slab may further include a joint reinforcing bar 170 protruding from the side slope 113 of the deck body 110 at a predetermined interval in the upward direction .

In other words, by including the joint reinforcing steel bar 170 as described above, the effective cross-section E of the concrete slab is reduced by the cross sectional loss L to the reduced effective cross-section e of the deck body 110, The deck 100 can be reinforced to prevent cracks on the upper portion of the side slope 113 of the deck body 110 as a portion of the deck 100 facing the deck 100. [

7, the joint reinforcing steel bar 170 is protruded from the side slope 113 of the deck body 110 so as to be partially exposed upward at a predetermined interval in the longitudinal direction, It is preferable that the bent protrusion 171 protruding from the side inclined surface 113 of the body 110 is formed in a trapezoidal shape.

The bending protrusion 171 protruding from the side inclined surface 113 of the deck main body 110 may be formed by bending into a mountain-like bending type having a sharp tip or a round bending type having a tip.

In this case, when the bending protrusion 171 is bent into a sharp-pointed mountain-like bending type, the tip is pointed, and the bending of the reinforcing bar into the mountain-like shape causes the tip to be slightly rounded to the radius of the reinforcing bar, As shown in Fig.

5, the joint reinforcement bars 170 may be formed on both side sloping surfaces 113 of the deck body 110, while the concrete slab placing deck 100 may be formed on both sides of the deck body 110, The bending protrusion 171 protruding from one side sloping surface 113 of the deck body 110 of one of the concrete slab placing decks 100 after being seated on the girder so as to be adjacent to each other, And the bending protrusion 171 protruding from the other side sloping side 113 of the other side of the deck main body 110 of the neighboring other concrete slab placing deck 100 are bent downward, The deck body 110 is protruded symmetrically with respect to the left and right direction so that the deck body 110 is vertically bent while being vertically overlapped while being abutted against each other.

That is, after the concrete slab placing deck 100 is seated and fixed on the girder so as to be adjacent to each other, the joint reinforcing steel bar 170, which is opposed to the concrete slab when seen from a plane, is reinforced with any one joint part from the side slope 113 It is preferable that the bending protrusions 171 of the reinforcing bars 170 are bent downward and then the bending protrusions 171 of the other one of the reinforcing bars 170 of the joints are bent vertically downward while abutting each other vertically.

6, the joint reinforcing bars 170 are respectively protruded from both side sloping surfaces 113 of the deck body 110, while the concrete slab placing decks 100 are formed to be adjacent to each other The bending protrusion 171 formed on one side slope 113 of one side of the deck body 110 of one of the concrete slab docking decks 100 so as to be fixed on the girder, The bent projections 171 protruding from the other side slopes 113 on the other side of the deck body 110 of the other concrete slab placing deck 100 are bent downward in the horizontal direction The deck body 110 may be bent so as to be downwardly bent so as to be offset from each other with respect to the right and left direction.

In other words, after the concrete pile-placing deck 100 is seated and fixed on the girder so as to be adjacent to each other, the joint reinforcing steel bar 170, which is opposed when viewed from a plane, The bending protrusion 171 of the reinforcing bar 170 and the bending protrusion 171 of the other joint reinforcing bar 170 may alternately bend downwardly with respect to the front and rear direction of the deck body 110 will be.

The strength reinforcement for preventing the cracks on the upper portion of the side slope 113 of the adjacent deck body 110 through the downward bending of the bending portion 170 of the joint reinforcing steel bar 170 is stable .

The joint reinforcing bars 170 may be formed by projecting the folding protrusions 171 from both side inclined surfaces 113 of the deck body 110. The folding protrusions 171 may be formed on the deck body 110, Side sloping surface 113 so as to be orthogonal to the side sloping surface 113 at any point from the upper end to the lower end of both side sloping surfaces 113 of the upper surface 110. [

For example, the bending protrusion 171 may be formed at any one point from the upper end to the lower end of the deck body 110 as well as the upper end of the side slopes 113, for example, from the center or the lower end of the side slopes 113, So as to be orthogonal to each other.

That is, it is preferable that the bending protrusion 171 is formed so as to project obliquely with a predetermined outward angle from the perpendicular perpendicular to the horizontal line between the side slopes 113 and the upper ends of the side slopes 113.

Of course, the joint reinforcing bar 171 is formed by projecting the bending protrusion 171 from both side inclined surfaces 113 of the deck body 110, and the bending protrusion 171 is formed on the deck body 110, The deck body 110 may be vertically and vertically protruded perpendicular to the horizontal line of the deck body 110 at any point from the upper end to the lower end of both side slopes 113 of the side deck.

In other words, the bending protrusion 171 of the joint reinforcing bar 171 is formed at a certain point from the upper end to the lower end of both side inclined surfaces 113 of the deck body 110, Or at a predetermined outward angle with respect to a vertical direction orthogonal to the horizontal line of the deck main body 110 on the side inclined surface 113. As shown in Fig.

The joint reinforcing bars 170 are formed on the side slope 113 of the deck body 110 so as to protrude from the deck body 110 at predetermined intervals in the upward direction. The portion projecting from the side inclined surface 113 may be formed as a wire mesh type.

As shown in FIG. 7 (d), the wire mesh type means a grid-like reinforcing steel structure having a mesh shape crossing the reinforcing bars having a predetermined diameter perpendicularly and vertically to each other.

FIGS. 8 and 9 are views illustrating other embodiments of protrusions, which are essential parts of a deck for pouring concrete slabs according to the present invention.

8 and 9, in the deck 100 for pouring a concrete slab according to the present invention, the protruding body is formed not only by the truss girder 130, but also by the bending stone work 130 ' (130 "). ≪ / RTI >

As shown in FIG. 8, the bending stone workpiece 130 'is disposed at a predetermined interval in the lateral direction so as to partially expose the upper portion of the deck body 110, and is extended in the longitudinal direction. .

As shown in FIG. 9, the upright stone outline 130 'is disposed at a predetermined interval in the lateral direction so as to be partially exposed at the upper portion of the deck body 110, The vertical reinforcement 131 '' and the vertical reinforcement 131 ', which are arranged at regular intervals in the lateral direction and the longitudinal direction so as to partially expose the upper portion of the deck body 110, And a horizontal reinforcing bar 132 " welded and fixed to the upper ends of the vertical reinforcing bars 131 "

In other words, the protrusions can be selectively applied to the truss girder 130, the bending stone work 130 'and the upright stone work 130' as described above.

Of course, although the protruding members are not shown in the drawing, they may be formed in a wave-like wire type in which the tip ends are bent in a round shape in a round shape at predetermined intervals.

According to the concrete slab placing deck 100 of the present invention as described above, the side inclined surface 113 of the deck body 110 is vertically or inclinedly protruded The reinforcing bars 170 are bent and intersected with each other on the side of the deck 100 where the reinforcing bars 170 are in contact with each other so as to reinforce the rigidity of the upper portion of the butt joint after the concrete is pushed onto the upper surface of the deck 100, It is possible to stably prevent occurrence of reflection cracks from the butt joint after the concrete is placed on the upper surface of the deck 100. [

In addition, by using the joint reinforcing steel bars 170 as described above, it is possible to prolong the life of the concrete slab structure by preventing the occurrence of reflection cracks, thereby prolonging the period of maintenance and re-working of the concrete slab structure after the construction.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, the invention is not limited thereto. Various modifications may be made by those skilled in the art. Are included in the scope of the present invention.

100: Deck
110: deck body 111: reinforcing rib
113: side inclined surface 130: truss girder
131: base wire 132: lattice bar
130 ': Bending stone work 130 ": Upright stone work
131 ": vertical reinforcement 132": horizontal reinforcement
140: transverse rebar 150: longitudinal rebar
170: joint reinforcement bar 171: bending protrusion
E: Effective cross section
e: reduced effective section
L: section loss

Claims (13)

A deck main body 110 having front and rear ends seated and fixed on the upper surface of the girders arranged and fixed at regular intervals on the bridge piers and having a side inclined surface 113 formed by pouring concrete, A plurality of reinforcing ribs 111 protruding downward in the longitudinal direction while being spaced apart from each other at regular intervals in the lateral direction of the deck body 110, A protruding body which is installed to extend in the longitudinal direction and is applied to one of the truss girder 130, the folding stone work piece 130 'and the upright stone work piece 130', is embedded in the center of the deck body 110, A transverse reinforcing steel bar 140 installed in a transverse direction orthogonal to a longitudinal direction of the protruding body and a longitudinally reinforcing steel bar 150 orthogonally intersecting the transverse reinforcing steel bar 140 and longitudinally oriented like the protruding body, To In addition, it is possible to prevent cracks due to the stress applied to the upper portion of the concrete slab due to the localized reduction of the section at the butt joint between the adjacent concrete slab placing decks 100 in the lateral direction after the construction of the concrete slab And a joint reinforcing steel bar 170 protruding from the side slope 113 of the deck body 110 so as to be partially exposed at a predetermined interval in the upward longitudinal direction ),
The joint reinforcing steel bar 170 is formed from the lower side slope 113 of the deck to the upper surface of the bridge slab 113 due to the cross sectional loss L at the joint portion between the decks having the effective cross- Of the deck body 110 so as to be orthogonal to one side from the upper end to the lower end on both side inclined surfaces 113 of the deck body 110 so as to be able to reinforce the strength for prevention of reflection cracks, The bending protrusion 171 is formed so as to protrude upward to a height equal to or more than the thickness of the deck body 110. When the bending protrusion 171 is downwardly bent to the adjacent deck body side, And the bending protrusions 171 of the reinforcing bars 170 are formed in a trapezoidal shape so that they are used for bridges. Deck for putting a crate slab.
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