KR20200107535A - Stepped prevention plate and construction method for building deck plate - Google Patents

Abstract

The present invention relates to a step prevention plate for a construction deck plate, which can suppress the occurrence of defects in cement plaster surfaces due to concrete pouring by preventing deflection that occurs in long sides of desk plates arranged adjacent to each other during installation of the deck plates for building a ceiling slab of a building, and a construction method thereof. Upper and lower reinforcing bars are respectively arranged in first and second rows and welded by auxiliary reinforcing bars to form a triangular shape so that both sides of the lower reinforcing bars are fixed and installed to be retained on support pieces mounted on the desk plates. Step prevention plates are fixed and installed on both long sides of the deck plates by fastening bolts at regular intervals in the longitudinal direction of a truss girder installed on the deck plates. While one of the deck plates is inclined at 10-30°, the step prevention plates are fitted between those of the adjacent deck plate, and thus the deck plates can be fixed to each other so that connection surfaces of the deck plates correspond to each other.

Description

Stepped prevention plate and construction method for building deck plate}

The present invention prevents sagging occurring at the long side of the deck plates arranged adjacent to each other during the installation work of a deck plate for constructing a ceiling slab of a building, thereby preventing the occurrence of defects in the visible surface due to concrete pouring. It relates to a step prevention plate of a deck plate for construction that can be suppressed and a construction method thereof.

In general building structures, before concrete is poured, a form is installed from plywood, square or steel, and a movable bar is installed below the formwork to support the load of concrete or rebar. Not only does it interfere with workers' passage, but they are also exposed to safety accidents.

In addition, there is a lot of difficulty in shortening the construction period because there is no work space for the work of the subsequent process under the slab, and there may be life accidents due to collapse of the formwork due to the construction that ignores the proper movable installation regulations.

Usually, reinforcing bars are placed in the formwork, and then concrete is poured for curing, and when the curing of the concrete is completed, the process of dismantling the formwork is required again, causing an accident in the process of installing and dismantling the formwork, as well as increasing the construction cost. It can also be a factor to make.

In order to solve this problem, recently, a "deck plate" in which a steel plate having a formwork function and a truss girder replacing reinforcement are integrally manufactured has been developed and is widely used in construction sites.

In other words, the deck plate can form a structure by pouring concrete as a substitute for a formwork in the case of forming a slab of a building, and if the slab structure is constructed in this way, it is required for temporary construction because a frame for floor concrete construction is not required. In addition to saving the time and cost of construction, it is possible to quickly perform construction by simply installing and fixing unit products continuously.

In addition, the use of factory-produced products has the advantage of securing a certain level of quality, and thus, construction cases of slab structures using deck plates are gradually increasing.

Among the deck plates currently in use, a representative material widely used for slab floor construction of large buildings is the truss-type deck plate. This truss-type deck plate is equipped with a truss girder on the upper part of the floor plate having a predetermined width, and a connecting member is installed at the lower part of the truss girder. Most truss girders are made of upper reinforcement, lower reinforcement and lattice material, and both sides At the end, a support member is coupled.

In connection with this technology, it is disclosed in detail in Korean Patent No. 1083698 or 1202377.

In addition, in the conventional general deck plate, the truss girder and the plate are integrated and fixed by welding, etc., so that the plate of metal is directly exposed to the lower part of the slab, so the welding part is not good in terms of aesthetics, and the recycling of the plate was not possible, so resources were wasted , As the lower part of the slab was not arranged, the construction of auxiliary members such as the Daldae was required in order to form the ceiling finish in the future, resulting in a problem that the air was lengthened and the floor height was lowered.In some cases, the structural safety of the Daldae was not supported. The moon zone is separated.

Accordingly, inventions have been proposed that can bind the truss girder and the plate using a connector and dismantle the plate later, but the method of combining the connector and the truss girder relies on a simple fitting method or bending a thin metal plate to be welded. Soon, it was easily separated by the load or the metal plate was bent and deformed.

Prior art related to this includes Korean Patent No. 1237325 and Korean Patent No. 1237333, but there are disadvantages in that the plate is bent and lifted by the load as well as the aforementioned problems, and accordingly, the end overlapping with the adjacent plate is reinforced. In order to do so, there is a limitation that the process of additionally reinforcing a separate binding tool must be accompanied in actual construction.

Registered Patent No. 1083698 (registered on November 9, 2011)-Tech plate with step reinforcement. Registered Patent No. 1202377 (registered on November 12, 2012)-Truss girder integrated tech plate. Registered Patent No. 1237325 (registered on Feb. 20, 2013)-Demoulding Tech. Registered Patent No. 1237333 (registered on Feb. 20, 2013)-Spacer for demoulding tech.

The present invention is to solve the conventional problems as described above, and an object of the present invention is to install a step prevention plate on both ends of the long side of the deck plate during the installation work of the deck plate for constructing the ceiling slab, and fit it like a sawtooth in the construction process. By putting it in close contact with the neighboring plate, it prevents the level difference on the concrete surface in a simpler way and improves the quality, as well as the level difference prevention plate of the deck plate for construction that does not require subsequent removal work. And to provide the construction method.

The present invention for achieving this purpose is to configure a deck plate on which a truss girder is mounted in a continuous adjacent arrangement to form a ceiling slab, wherein the truss girder is arranged in one row and two rows of upper and lower reinforcing bars, respectively. It is welded by auxiliary reinforcing bars to form a triangular shape, and at the same time, both lower reinforcing bars are maintained and installed on the support piece mounted on the deck plate, and steps are prevented on both long sides of the deck plate along the longitudinal direction of the tris girder installed on the deck plate. The plate is fixedly installed by fastening bolts at regular intervals.

In addition, the auxiliary reinforcing bar is bent in a serrated shape and is welded to the outer surface of the upper reinforcing bar and the inner surface of the lower reinforcing bar to form a triangular shape, and a step prevention plate installed on both long sides of the deck plate The centers of each are arranged to be offset from each other at regular intervals.

In addition, the present invention is for constituting a deck plate on which a truss girder is mounted in a continuous adjacent arrangement to form a ceiling slab, and the upper and lower reinforcing bars are arranged in one row and two rows respectively to form a triangular shape. After fixing and installing so that the lower reinforcing bars on both sides of the deck plate are maintained on the support piece mounted on the deck plate, step prevention plates are attached to the fastening bolts at regular intervals on both long sides of the deck plate along the longitudinal direction of the tris girder installed on the deck plate. It is fixedly installed by means of, and in a state in which the angle of the one deck plate is inclined by 10 to 30°, the step prevention plate is inserted between the step prevention plates of the adjacent deck plates so that the connection surfaces of the two deck plates can be fixed to each other.

According to the present invention, the boundary point of the deck plate due to the load applied during concrete pouring can be prevented from moving separately during the installation work of the deck plate for constructing the ceiling slab. By preventing the occurrence of step difference in the slab, it can fundamentally block the occurrence of defects on the concrete standoff surface of the slab.

In addition, in the present invention, since the step prevention plates mounted on both ends of the long side of the deck plate can be completely combined with the neighboring plates by mutual fitting, the quality can be improved by preventing the step difference on the concrete protruding surface. There is an effect of reducing cost and shortening the construction period because there is no need to separately perform subsequent removal work due to defective step.

1 is a perspective view showing a state in which a deck plate disclosed in Patent Registration No. 0993880 is laid on a beam and unfolded;
Figure 2 is an exploded perspective view of the deck plate provided with the step stiffener of Figure 1,
Figure 3 is a bottom exploded perspective view showing by cutting the inner and outer structures of the connector, the connection bolt and the banting cap constituting the deck plate,
Figure 4 is a cross-sectional view showing a separated state by cutting the connector constituting the deck plate, the formwork, the connection bolt and the banting cap;
5 is a cross-sectional view showing a state in which the banding cap is coupled to the connector;
6 is a cross-sectional view showing a state in which a computerized bolt and a dagger are coupled to a connector in a state in which concrete is poured and cured by a deck plate;
7 is a cross-sectional view showing another embodiment of the deck plate,
8a and 8b are plan and side views showing a deck plate for construction according to the present invention,
9A and 9B are bottom and side views of the deck plate,
10 and 11 are views showing a state in which a deck plate is mounted on a brace;
12 is a perspective view showing a state in which a deck plate is assembled to an adjacent deck plate;
13 is a side configuration diagram showing a state in which the deck plate is mounted on the brace.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings, but specific structures and functions thereof are not limited to the embodiments described in the present specification since they represent one configuration example.

First, as a preferred example to which the present invention is applied, the core technology of the prior publication disclosed in Patent No. 0993880 will be described in detail, and after deriving the problems according to the present invention, the configuration and effects of the present invention will be described later.

1 to 7, the deck plate (A) includes a general steel framed structure (steel structure), a reinforced concrete structure (RC structure), a steel framed concrete structure (steel framed) Reinforced concrete structure: SRC structure), etc.

The deck plate (A) is composed of a truss girder (10), a support (20), a connector (30), a formwork (40), a bending cap (60) and a step stiffener (70).

A plurality of connector 30 is coupled to the lower portion of the truss girder 10, and the formwork 40 is coupled to the plurality of connector 30 to be detachable. In the truss girder 10, the lattice members 120 bent in a wave shape on both sides around the upper reinforcing bar 110 are coupled by welding joints, respectively, and the lower reinforcing bars 130 on the lower outer side of the lattice member 120 are respectively It is joined by a welded joint to form a triangular shape.

The lower width of the truss girder 10 is 60 mm, the height is 100 mm, and the length is approximately 3,300 mm to 4,000 mm, and one truss girder 10 is arranged in about three rows in the formwork 40. That is, when the truss girders 10 are arranged in three rows on the formwork board 40, the upper reinforcing bar 110 of the truss girder 10 is positioned at a position of 100mm, 200mm, and 300mm vertically of the formwork board 40. It is desirable.

In the case of a steel structure, the length of the truss girder 10 is formed longer than the length of the formwork 40 so that the ends of the truss girder 10 protrude further toward both sides of the formwork 40 in the longitudinal direction. Therefore, it is preferable that the protrusion of the truss girder 10 is placed on the top of the beam of the steel structure. In the RC structure or the SRC structure, the length of the truss girder 10 and the formwork 40 are the same according to the design.

The support 20 prevents the gap between the upper reinforcement 110, the lattice material 120, and the lower reinforcement 130 constituting the truss girder 10 from being changed and at the same time stably spans both ends of the beam. It has the ability to The support member 20 is welded by abutting the upper reinforcing bar 110 of the truss girder 10 to the upper end of the vertical member 210 in a state in which the horizontal member 220 is welded to the lower end of the vertical member 210 in an orthogonal direction. It is coupled, and the lower reinforcing bars 130 of the truss girder 10 are butted at both ends of the horizontal member 220 and are joined by welding joints.

The connector 30 has a function of stably coupling the truss girder 10 to the upper part of the formwork 40, and the female screw hole 311 is formed upwardly at the lower part of the connection body 310 to connect the bolt 320 It is configured so that it can be connected and disconnected. The connector 30 is formed with a fitting groove 312 in which the lower reinforcing bar 130 of the truss girder 10 is inserted in the transverse direction on one side of the upper portion of the connecting body 310, and an inclined portion at the upper portion of the fitting groove 312 (313) is formed to be inclined downward toward the fitting groove (312).

In addition, two recessed portions 318 and 318' are formed on the outer surface of the fitting groove 312 formed on the connection body 310 of the connector 30, and a reinforcing protrusion 319 is formed therebetween. In addition, a truncated cone-shaped support portion 314 is formed downward at the lower center of the connection body 310, and four support legs 315 are formed downward at each corner around the support portion 314, and the connection body ( A front fitting hole 316 and a rear fitting hole 317 are integrally formed at the front and rear sides of the lower part of 310).

The connection bolt 320 has a washer plate 322 integrally formed at the lower end of the male screw portion 321, and a polygonal bolt head 323 integrally formed at the lower portion of the washer plate 322. It is preferable to install this connector 30 to have a zigzag shape.

The formwork 40 has a function of stably supporting the overall load in the process of curing at the same time as the concrete is poured, and may be composed of any one of plywood, synthetic resin, or steel plate.

The banding cap 60 is forcibly fitted while surrounding the lower reinforcing bar 130 of the truss girder 10 and is formed in the shape of a hexahedron with an open lower part, and a mortar filling hole 610 on the upper surface of the banding cap 60 ) Is formed, and ∩-shaped grooves 620 are integrally formed on the left and right sides.

In addition, two cutting grooves (630, 630') are formed at the front and rear surfaces of the banding cap 60, and at the same time, a front elastic piece 640 is formed on the front surface by the two cutting grooves (630, 630'), and The rear elastic piece 650 is integrally formed.

In addition, the front and rear elastic pieces (640, 650) of the banding cap (60) are formed with locking protrusions (641, 651), respectively, so that the banding cap (60) is forcibly fitted to the connection body (310) of the connector (30). When the locking projections 641 and 651 of the front and rear elastic pieces 640 and 650 are configured to be fitted into the front and rear fittings 316 and 317 of the connection body 310.

And such a banding cap 60 is a lower reinforcing bar 130 to prevent separation of the truss girder 10 in a state coupled to the upper portion of the connection body 310 of some of the connector 30 of the plurality of connector 30 It is enclosed and combined. At this time, it is preferable that 2 to 4 banding caps 60 are usually installed on one truss girder 10.

The connection bolt 320 from the lower part of the formwork board 40 penetrates through the bolt hole H of the formwork board 40 and is configured to be screwed into the female threaded hole 311 formed in the lower part of the connection body 310.

The step stiffener 70 has a function of allowing one side of the deck plate (A) and the other side of the deck plate (A) to be installed flat without a step difference. A step stiffener 70 is connected to and installed to each formwork board 40 between the one deck plate A and the other deck plate A installed adjacent to each other.

The step stiffener 70 is a lower reinforcing bar 130 of the truss girder 10 installed at the longitudinal end of one deck plate A and the lower part of the truss girder 10 installed at the longitudinal end of the other deck plate A It is connected to the lower part of the reinforcing bar 130, and it is preferable to have a length of about 150mm to 180mm.

In this step stiffener 70, both ends of the reinforcing body 710 are bent in opposite directions to form a reinforcing flange 720, respectively, and a plurality of mortar holes 711 are formed in the reinforcing body 710. A mortar groove 712 is integrally formed under the reinforcing body 710.

After the concrete (C) poured into the deck plate (A) is cured, the connection bolt (320) screwed to the connector (30) is disassembled to separate the formwork (40), and the connection body ( 310) As shown in FIG. 6 in the lower female screw hole 311, the male screw portion 810 of the computerized bolt 80 is screwed, and the lower end bolt head 820 of the computerized bolt 80 has a female threaded part ( 821) is formed and the daldae 90 for installing the ceiling is screwed.

At this time, the computerized bolt 80 may be such that the male screw portion 810 and the bolt head 820 are separated, and in this case, a female screw portion 821 is formed on the upper portion of the bolt head 820 to form a female screw portion 821. ) To the male screw portion 810 is coupled. In addition, since a separate anchor work for constructing the daldae 90 is not required, subsequent ceiling construction work can be easily performed.

By the way, in the prior art as described above, the construction work of the integrated deck plate is carried out by a method of fitting a step by applying a latch using a reinforcing material suitable for the covering thickness of the adjacent deck plate. Therefore, there is a problem in that it is not fully coupled with the neighboring deck plate, so that the completely fixed state cannot be maintained as individual movements due to the load occur.

For this reason, when the concrete is poured at the construction site, the level difference generated between the deck plates as well as the level difference due to the load of the concrete, the level difference due to the compaction equipment, etc.are exposed as it is as it is demolded after the concrete is cured. Therefore, since there is a problem in the construction of paint or spraying finish, air delay and construction costs are additionally generated due to the additional surface grinding work.

In addition, it is possible to use a relatively reliable method of mounting a step prevention square material on the deck plate and fixing it with an adjacent deck plate and iron nails, but the loss of the square material is large, resulting in low economic efficiency as well as a great difficulty in use due to production, installation and labor costs. This is a very limited practice.

On the other hand, the accompanying Figures 8a to 13 are views for explaining the step prevention plate and the construction method of the deck plate for building according to the present invention.

As shown in these drawings, the deck plate 400 in the present invention includes a truss girder 410 arranged in three rows and a support piece 420 for holding each truss girder 410 It consists of a step prevention plate 430 mounted on the long sides of both sides of the plate 400.

The short side of the deck plate 400 is mounted on and maintained on the support 440, and at the same time, the long side of each of the deck plates 400 is continuously adjacent to each other according to the specifications of the ceiling slab.

As before, the truss girder 410 is welded by auxiliary reinforcing bars 413 so that the upper and lower reinforcing bars 411 and 412 are arranged in one row and two rows, respectively, to form a triangular shape, and the lower reinforcing bars 412 on both sides are deck plates. It is maintained and installed on the support piece 420 mounted on the 400.

The auxiliary reinforcing bar 413 is bent in a serrated shape and welded to the outer surface of the upper reinforcing bar 411 and the inner surface of the lower reinforcing bar 412 so that the upper and lower reinforcing bars 411 and 412 form a triangular shape.

In addition, along the longitudinal direction of the truss girder 410 installed on the deck plate 400, step prevention plates 430 are fixedly installed on both sides of the deck plate 400 by fastening bolts 431 at regular intervals. .

In the case of the step prevention plate 430, each of the centers (Q1, Q2) should be mounted using each of the fastening bolts 431 on the long sides of the deck plate 400 so that they are offset from each other at a certain interval (L). I can.

As shown in FIGS. 8A and 8B, the upper and lower reinforcing bars 411 and 412 are welded so that the auxiliary reinforcing bar 413 is positioned on the outer surface of the upper reinforcing bar 411 and the inner surface of the lower reinforcing bar 412. Are arranged in one row and two rows, respectively, to form a triangle shape.

In this state, three rows of truss girders 410 on one deck plate 400 by fitting and maintaining the lower reinforcing bars 412 on both sides on the support pieces 420 mounted at regular intervals on the deck plate 400 Can be installed.

In addition, a step prevention plate 430 is fixedly installed by fastening bolts 431 at regular intervals on both long sides of the deck plate 400 along the longitudinal direction of the truss girder 410, in which case one deck plate ( Connection of both deck plates 400 by inserting the step prevention plate 430 between the step prevention plates 430 of the deck plates 400 arranged adjacent to each other while the angle (a) of 400) is inclined to about 10 to 30°. They can be fixed to each other so that the faces are aligned.

That is, as shown in FIGS. 12 and 13, in the case of installing the deck plate 400 at a construction site, after the short side of the first deck plate 400 is placed on the support 440 of the slab completed The short side of the deck plate 400 is fixed by driving a nail 442 into the frame square material 441.

Subsequently, the angle (a) of the adjacent deck plate 400 is tilted downward by 10 to 30°, and the terminal prevention plate 430 is first fixed to the step prevention plate 430 and the teeth of the deck plate 400. It is possible to prevent concrete paste from flowing by pulling until the long sides of the deck plate 400 are completely in close contact with each other while being inserted so as to cross the shape.

After that, when the position of the adjacent deck plate 400 is placed in the correct position, the decks disposed adjacent to each other by fixing both short sides of the deck plate 400 with nails 442 to the frame beam 441 of the support 440 The plate 400 is perfectly fixed to reliably prevent a step during construction or a step during concrete pouring.

As described above, according to the step prevention plate and the construction method of the deck plate for construction according to the present invention, it is possible to prevent the connection surface from moving separately during the installation work of the deck plate for constructing the ceiling slab. By preventing the occurrence of a step at the boundary point of the deck plate due to the load applied to the slab, it is possible to fundamentally block the occurrence of defects in the concrete protruding surface of the slab.

In addition, in the present invention, since the step prevention plates mounted on both ends of the long side of the deck plate can be completely combined with the neighboring plates by mutual fitting, the quality can be improved by preventing the step difference on the concrete protruding surface. There is an effect of reducing cost and shortening the construction period because there is no need to separately perform subsequent removal work due to defective step.

The technical task of the present invention is achieved by the technical configuration as described above, and although it has been described by the limited embodiments and drawings, the present invention is not limited thereto, and the present invention by those of ordinary skill in the art to which the present invention pertains. It goes without saying that various modifications and variations are possible within the scope of the technical idea of and the claims to be described below.

400: deck plate 410: truss girder
411: upper reinforcing bar 412: lower reinforcing bar
413: auxiliary reinforcing bar 420: base
430: step prevention plate 431: fastening bolt
440: support 441: frame timber
442: nail

Claims (4)

In order to form a ceiling slab, the deck plate 400 on which the truss girder 410 is mounted is continuously arranged adjacent to each other, and the truss girder 410 has upper and lower reinforcing bars (411, 412) in one row and two rows. Each of them is arranged to form a triangular shape, welded by auxiliary reinforcing bars 413 and at the same time, both lower reinforcing bars 412 are maintained and installed on a support piece 420 mounted on a deck plate 400, and the deck plate 400 Of the deck plate for construction, characterized in that the step prevention plate 430 is fixedly installed by fastening bolts 431 at regular intervals on both long sides of the deck plate 400 along the longitudinal direction of the tris girder 410 installed in Step prevention plate. The method of claim 1, wherein the auxiliary reinforcing bar 413 is bent in a serrated shape and welded to the outer surface of the upper reinforcing bar 411 and the inner surface of the lower reinforcing bar 412 so that the upper and lower reinforcing bars (411, 412) have a triangular shape. Step prevention plate of the deck plate for construction, characterized in that configured to achieve. The method of claim 1, wherein the step prevention plates 430 installed on both long sides of the deck plate 400 are arranged so that their centers (Q1, Q2) are offset from each other at a predetermined interval (L). Deck plate step prevention plate. In order to form a ceiling slab, the deck plate 400 on which the truss girder 410 is mounted is continuously arranged adjacent to each other, and the upper and lower reinforcing bars 411 and 412 are arranged in one row and two rows to form a triangular shape. After fixing and installing so that both lower reinforcing bars 412 are maintained on the support piece 420 mounted on the deck plate 400 by welding by the auxiliary reinforcing bar 413, the tris girder 410 installed on the deck plate 400 ), the step prevention plate 430 is fixedly installed on the long sides of both sides of the deck plate 400 by fastening bolts 431 at regular intervals, and the angle (a) of the one deck plate 400 is 10 It characterized in that the step prevention plate 430 is inserted between the step prevention plates 430 of the deck plates 400 arranged adjacent to each other so that the connection surfaces of the two deck plates 400 coincide with each other. Construction method of the deck plate for construction.

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