Deck plate having locking member

Abstract

The present invention relates to a deck plate comprising a floor plate (10) on which concrete is poured to form a slab on top, which is mounted between a plurality of mutually spaced support beams, and a truss-type reinforcing bar assembly (20) installed on the upper part of the floor plate (10) to be embedded in the concrete, wherein the truss-type reinforcing bar assembly (20) comprises a lower main reinforcing bar (21) installed along the width direction, an upper main reinforcing bar (22) installed along the width direction on the upper part of the lower main reinforcing bar (21), and a lattice (23) connecting the lower main reinforcing bar (21) and the upper main reinforcing bar (22); wherein the deck plate comprises a tension reinforcing member (110) which is joined by overlapping joint to one edge of the upper main reinforcing bar (22) to bear the tensile load occurring in the negative moment section of the slab; By providing a deck plate characterized by having a beam reinforcing member (100) comprising a beam reinforcing member (190) formed at one end of the tension reinforcement member (110) to be supported by beam reinforcing bars (1b) arranged inside a formwork (1a) to form a reinforced concrete support beam, accidents caused by the collapse of the support beam formwork are prevented, the negative moment section is efficiently reinforced, and the sagging of the deck plate is stably prevented before and after concrete pouring work.

Description

Technology Field

[0001] The present invention relates to the field of construction technology, and more specifically, to a deck plate equipped with a beam reinforcing bar support member. Background Technology

[0002] Deck plates, which utilize a truss-type rebar assembly installed on top of a thin steel plate as formwork for constructing building slabs, have long been widely used at domestic construction sites.

[0003] The above deck plate comprises a floor plate (10) on which concrete is poured to form a slab on top, which is mounted between a plurality of mutually spaced support beams, and a truss-type reinforcing bar assembly (20) installed on the upper part of the floor plate (10) to be embedded in the concrete. (Fig. 1)

[0004] In order to form a reinforced concrete support beam, a formwork (1a) is installed, and beam reinforcement (1b) is arranged inside it.

[0005] The truss-type reinforcing bar assembly (20) is composed of a lower main reinforcing bar (21) installed along the width direction, an upper main reinforcing bar (22) installed along the width direction on the upper part of the lower main reinforcing bar (21), and a lattice (23) connecting the lower main reinforcing bar (21) and the upper main reinforcing bar (22).

[0006] At the ends of a pair of lower main reinforcing bars (21) installed at the bottom of one upper main reinforcing bar (22), a lower reinforcing bar (24) is connected along the longitudinal direction.

[0007] A crank (2) is installed at the end of the truss-type reinforcing bar assembly (20) so as to be supported by hanging on the side wall of the formwork (1a).

[0008] To provide shear reinforcement for the upper area of ​​the support beam, shear reinforcement (2) is installed, distribution reinforcement (3) is installed along the longitudinal direction, and connecting reinforcement (4) is installed to connect the deck plates on both sides.

[0009] Compared to conventional slab construction methods using wooden formwork, this method of applying deck plates has advantages such as the ability to omit the installation of temporary supports for concrete pouring and the reduction of time required for assembling and dismantling formwork.

[0011] Figure 2 is a diagram of load conditions and bending moments used for structural analysis (calculation) of a conventional deck plate.

[0012] Since the deck plate serves as formwork for the slab during construction (before concrete curing) and as a reinforcing material for the slab during use (after concrete curing), the load conditions that serve as the premise for structural analysis differ between before and after construction (before and after concrete hardening).

[0013] The load combination used for calculating deflection and stress during construction (before concrete curing) considers the self-weight of the fresh concrete and deck plate as the dead load, and the working load, including impact loads, as the live load.

[0014] Since the supports of the deck plate are not fixed during construction (before concrete curing), it is assumed that the load during construction is supported solely by the deck plate, and the analysis is performed by treating both ends of the deck plate as simply supported.

[0016] W1 (Construction Load) = Dead Load (Self-weight of unhardened concrete, Self-weight of deck plate) + Live Load (Working Load)

[0018] The load combination used for calculating deflection and stress during use (after concrete curing) considers the self-weight of the hardened concrete and deck plate as the dead load, and the load to be applied to the slab during use as the live load.

[0019] Since the supports of the deck plate are fixed during use (after concrete curing), it is assumed that the load during use is shared between the deck plate and the supporting beam, and the analysis is performed by treating both ends of the deck plate as fixed supports.

[0021] W2 (Load during use) = Dead load (self-weight of hardened concrete, self-weight of deck plate) + Live load (live load)

[0023] As such, since the structural analysis of the deck plate differs depending on whether it is before or after construction (before or after the concrete hardens), structural analysis is performed and structural design is carried out based on the bending moment that combines the bending moment due to the load during construction and the bending moment due to the load during use.

[0025] W3 (Combined Load) = W1 (Construction Load) + W2 (Usage Load)

[0027] Figure 3 is a diagram illustrating the shear force and bending moment generated by the reaction force in a continuous bridge.

[0028] Multiple deck plates installed on multiple support beams spaced apart along the width direction can be analyzed under load conditions such as those of a continuous bridge.

[0029] As described, it can be confirmed that the largest bending moment occurs in the negative moment section at the location of the supporting beam (pier).

[0030] The upper main reinforcement (22) of the truss-type reinforcement assembly (20) of the deck plate acts as compression reinforcement in the positive moment section and as tension reinforcement in the negative moment section. Since the largest bending moment occurs in the negative moment section as described above, the cross-section of the upper main reinforcement (22) is designed based on this.

[0032] The following problems have been pointed out regarding conventional deck plates.

[0033] First, since the deck plate is supported only by the side wall of the formwork (1a), there is a high risk of accidents.

[0034] With the end of the bottom plate (10) of the deck plate mounted on the top of the side wall of the formwork (1a), the reinforcement of the beam (1b) inside the formwork (1a) is performed, and then the concrete of the slab and the beam is poured as a single unit.

[0035] At this time, as an excessive load is applied to the side wall of the formwork (1a), accidents caused by the collapse of the formwork (1a) frequently occur.

[0036] Second, there is no reinforcement structure in the negative moment section.

[0037] As described above, the largest bending moment occurs in the negative moment section of the support beam location. Conventionally, there is no reinforcement structure for this, and the cross-section of the upper main reinforcement (22) is designed simply based on this, so the upper main reinforcement in the positive moment section becomes an over-reinforced structure.

[0038] Third, the structure for preventing deck plate sagging before and after concrete pouring is inefficient.

[0039] The upper main reinforcement (22) of the truss-type reinforcing assembly (20) must resist the bearing pressure of the worker before concrete pouring, resist the load of the concrete before hardening before concrete pouring and resist the compressive force applied to the upper part of the slab after concrete curing in order to prevent sagging of the deck plate.

[0040] Here, the dominant load is the load of the concrete before it hardens. In the past, the cross-section of the upper main reinforcement (22) was simply enlarged to resist the above load, so when in use (after the concrete has cured), the upper main reinforcement in the positive moment section becomes an over-reinforced structure.

[0042] The drawing symbols of the above prior art are limited only to the description of the said prior art. Prior art literature

[0043] Korean Registered Patent 10-1202377, Korean Published Patent 10-2023-0139651, Korean Registered Patent 10-1761326, Korean Registered Patent 10-1216166 The problem to be solved

[0044] The present invention was developed to solve the aforementioned problems and aims to provide a deck plate equipped with a beam reinforcement support member that prevents accidents caused by the collapse of the support beam formwork, efficiently reinforces the negative moment section, and stably prevents sagging of the deck plate before and after concrete pouring operations. means of solving the problem

[0045] To solve the above problem, the present invention comprises a deck plate having a floor plate (10) which is placed between a plurality of mutually spaced support beams and on which concrete is poured to form a slab on top, and a truss-type reinforcing bar assembly (20) installed on the upper part of the floor plate (10) to be embedded in the concrete, wherein the truss-type reinforcing bar assembly (20) comprises a lower main reinforcing bar (21) installed along the width direction, an upper main reinforcing bar (22) installed along the width direction on the upper part of the lower main reinforcing bar (21), and a lattice (23) connecting the lower main reinforcing bar (21) and the upper main reinforcing bar (22); wherein the deck plate comprises a tension reinforcing member (110) which is joined by overlapping joint to one edge of the upper main reinforcing bar (22) to bear the tensile load occurring in the negative moment section of the slab; A deck plate is provided that includes a beam reinforcing member (100) comprising a beam reinforcing member (190) formed at one end of the tension reinforcement member (110) to be supported by a beam reinforcing bar (1b) arranged inside a formwork (1a) to form a reinforced concrete support beam.

[0046] The above beam reinforcing bar support member (190) preferably includes a lateral extension member (191) formed extending to one side from one end of the tension reinforcing member (110); and a beam reinforcing bar catch member (192) formed by bending downward from one end of the lateral extension member (191) so as to be caught and supported on the side of the beam reinforcing bar (1b).

[0047] The above beam reinforcing bar support member (190) preferably includes a lateral extension member (191) formed extending to one side from one end of the tensile reinforcing member (110); and a beam reinforcing bar catch member (193) formed by bending into a loop structure at one end of the lateral extension member (191) to surround the lower part of the beam reinforcing bar (1b).

[0048] The above beam reinforcing bar support member (100) preferably further includes a formwork support member (180) formed at one end of the tension reinforcing member (110) so as to be supported by hanging on the side wall of the formwork (1a).

[0049] It is preferable that the above beam reinforcing bar support member (100) further includes a spacing member (170) formed at the other end of the tension reinforcing member (110) to maintain a spacing between the floor plate (10) and the upper main reinforcing bar (22).

[0050] The above spacing member (170) preferably includes: a lower extension member (171) formed extending downward from the other end of the tension reinforcement member (110); and a lower support member (172) formed at the bottom of the lower extension member (171) and installed to be supported by a pair of lower main reinforcement members (21) of the truss-type reinforcing bar assembly (20) or the floor plate (10).

[0051] The present invention provides a deck plate comprising a floor plate (10) on which concrete is poured to form a slab on top, which is mounted between a plurality of mutually spaced support beams (1), and a truss-type reinforcing bar assembly (20) installed on the upper part of the floor plate (10) to be embedded in the concrete, wherein the truss-type reinforcing bar assembly (20) comprises a lower main reinforcing bar (21) installed along the width direction, an upper main reinforcing bar (22) installed along the width direction on the upper part of the lower main reinforcing bar (21), and a lattice (23) connecting the lower main reinforcing bar (21) and the upper main reinforcing bar (22), and wherein the deck plate comprises a beam reinforcing bar support portion (190) formed at one end of the upper main reinforcing bar (22) to be supported by a beam reinforcing bar (1b) arranged inside a formwork (1a) to form a reinforced concrete support beam. Effects of the invention

[0052] The present invention provides a deck plate equipped with a beam reinforcement support member that prevents accidents caused by the collapse of the support beam formwork, efficiently reinforces the negative moment section, and stably prevents sagging of the deck plate before and after concrete pouring operations. Brief explanation of the drawing

[0053] FIG. 1 is a cross-sectional view of a conventional deck plate. Figures 2 and 3 are bending moment diagrams for structural analysis of a deck plate. FIG. 4 and below illustrate embodiments of the present invention, FIG. 4 is a side view of a first embodiment of a deck plate. FIG. 5 is a side view of a first embodiment of a beam reinforcing bar support member. FIG. 6 is a side view of a second embodiment of a deck plate. FIG. 7 is a side view of a second embodiment of a beam reinforcing bar support member. FIG. 8 is a side view of a third embodiment of a deck plate. FIG. 9 is a side view of a third embodiment of a beam reinforcing bar support member. FIG. 10 is a rear view of a fourth embodiment of a beam reinforcing bar support member. Specific details for implementing the invention

[0054] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0055] As illustrated in FIG. 7 and below, the deck plate according to the present invention basically comprises a floor plate (10) which is placed between a plurality of mutually spaced support beams (1) and on which concrete is poured to form a slab on top, and a truss-type reinforcing bar assembly (20) installed on the upper part of the floor plate (10) to be embedded in the concrete.

[0056] A truss-type reinforcing bar assembly (20) comprises a lower main reinforcing bar (21) installed along the width direction, an upper main reinforcing bar (22) installed along the width direction on the upper part of the lower main reinforcing bar (21), and a lattice (23) connecting the lower main reinforcing bar (21) and the upper main reinforcing bar (22).

[0057] The beam reinforcing bar support member (100) is formed by reinforcing bars, steel rods, etc., and is basically composed of a tensile reinforcement part (110) and a beam reinforcing bar support part (190).

[0058] The tensile reinforcement (110) is a linear structure and is welded and overlapped at one edge of the upper main reinforcement (22) to bear the tensile load occurring at the upper part of the negative moment section of the slab.

[0059] The beam reinforcing bar support portion (190) is formed at one end of the tensile reinforcement portion (110) so as to be supported by the beam reinforcing bar (1b) arranged inside the formwork (1a) to form a reinforced concrete support beam.

[0061] The beam reinforcing bar support member (190) may be configured to include: a lateral extension member (191) formed extending to one side from one end of the tension reinforcing member (110); and a beam reinforcing bar catch member (192) formed by bending downward from one end of the lateral extension member (191) so as to be caught and supported on the side of the beam reinforcing bar (1b). (Figs. 4 to 7)

[0062] The embodiment of FIGS. 4 and 5 is a structure in which the lateral extension (191) is formed long so that the beam reinforcing bar catch (192) is caught and supported on the side of the beam reinforcing bar (1b) located far from one side deck plate, thereby reliably preventing the deck plate from detaching from the formwork (1a) in the installed state of the deck plate (before pouring slab concrete).

[0063] In this case, since the lateral extensions (191) of the two deck plates come into contact with each other, when they are joined by welding or the like, the construction of a separate connecting reinforcing bar can be omitted.

[0064] The beam reinforcing bar catch portion (192) is formed by bending downward from one end of the lateral extension portion (191) so as to be caught and supported on the side of the beam reinforcing bar (1b), and may be formed to make precise contact with the side of the beam reinforcing bar (1b), or may be formed to have a slight gap from the side of the beam reinforcing bar (1b) to account for construction errors.

[0065] The embodiment of FIGS. 6 and 7 is a structure in which the lateral extension (191) is formed short so that the beam reinforcing bar catch (192) is caught and supported on the side of the beam reinforcing bar (1b) located near one side deck plate, and can be effectively applied when assembling the beam reinforcing bar (1b) after the deck plate is installed.

[0066] The beam reinforcing bar support member (190) may be configured to include: a lateral extension member (191) extending to one side from one end of the tension reinforcing member (110); and a beam reinforcing bar catcher (193) formed by bending into a loop structure at one end of the lateral extension member (191) to surround the lower part of the beam reinforcing bar (1b). (Figs. 8, 9)

[0067] This can also be effectively applied when assembling the beam reinforcement (1b) after installing the deck plate.

[0068] When a deck plate is mounted on the side wall of the formwork (1a) and assembly work of a beam reinforcing bar (1b) is performed inside the formwork (1a), the formwork support member (180) prevents the deck plate from coming off, and during the assembly process of the beam reinforcing bar (1b), the beam reinforcing bar support member (190) is supported by the assembled beam reinforcing bar (1b), thereby reducing the risk of an accident caused by the deck plate coming off during the assembly work of the beam reinforcing bar (1b).

[0070] The beam reinforcing bar support member (100) may further comprise a formwork support member (180) formed at one end of a tension reinforcing member (110) so as to be supported by hanging on the side wall of the formwork (1a).

[0071] Specifically, the formwork support member (180) is configured to include a formwork vertical support member (181), a formwork side wall support member (182), and a formwork side wall catch member (183).

[0072] The vertical support member (181) of the formwork is formed by bending downward from one end of the tension reinforcement member (110).

[0073] The formwork side wall support (182) is formed by bending it to one side from the bottom of the formwork vertical support (181) so as to contact the top of the side wall of the formwork (1a).

[0074] The formwork side wall catch (183) is formed by bending downward from one end of the formwork side wall support (182) so as to catch on the inner surface of the side wall of the formwork (1a).

[0075] These formwork support members (180) allow the deck plate to be supported by the side wall of the formwork (1a), and also prevent the deck plate from coming off the side wall of the formwork (1a) by the formwork side wall catch members (183).

[0077] The beam reinforcing bar support member (100) may further include a spacing member (170) formed at the other end of the tension reinforcing member (110) to maintain a spacing between the bottom plate (10) and the upper main reinforcing bar (22).

[0078] This may be configured to include: a lower extension (171) formed extending downward from the other end of the tension reinforcement (110); and a lower support (172) formed at the bottom of the lower extension (171) and installed to be supported by a pair of lower main reinforcements (21) or a floor plate (10) of the truss-type reinforcing bar assembly (20). (Fig. 10)

[0079] When both ends of the lower support member (172) are connected to a pair of lower main reinforcing bars (21), it serves to distribute the load transmitted from the lower extension member (171) to the pair of lower main reinforcing bars (21).

[0080] When the lower support member (172) is connected to the bottom plate (10), it serves to distribute the load transmitted from the lower extension member (171) to the bottom plate (10).

[0081] If there is no lower support member (172) and the lower end of the lower extension member (171) is directly connected to the bottom plate (10), stress concentration occurs at the connection point of the bottom plate (10), and the lower support member (172) serves to prevent this.

[0082] This spacing member (170) maintains the spacing between the floor plate (10) (lower main reinforcement (21)) and the upper main reinforcement (22) in the truss-type reinforcing assembly (20), thereby preventing the upper main reinforcement (22) from sagging, and ultimately achieving the effect of preventing the deck plate from sagging.

[0083] Therefore, before pouring concrete, resistance to the working pressure is increased, before curing concrete, resistance to the load of the concrete before hardening is increased, and after curing concrete, resistance to the compressive force applied to the top of the slab is increased.

[0084] In particular, since it prevents the deck plate from sagging due to the self-weight of the concrete before it hardens, which is the dominant load, the cross-section of the upper main reinforcement (22), which acts as compression reinforcement in the positive moment section, can be designed to be reduced.

[0086] This has the following effects.

[0087] First, since the deck plate is supported by the side wall of the formwork (1a) as well as the beam reinforcement (1b), the risk of accidents can be reduced.

[0088] As the deck plate is mounted on the side wall of the formwork (1a) and the beam reinforcing bar support member (100) is supported by being hooked onto the beam reinforcing bar (1b), the working load is distributed, thereby reducing the risk of the deck plate detaching or falling.

[0089] Second, the negative moment section can be efficiently reinforced.

[0090] The tensile reinforcement (110) and lateral extension (191) of the reinforcing member (100) reinforce the negative moment section of the slab, so the cross-section of the upper main reinforcement (22) can be designed to be reduced.

[0091] In the positive moment section of the upper main reinforcement (22), it is sufficient to design an amount of reinforcement sufficient to perform the role of compression reinforcement throughout the construction period (before and after the concrete hardens), because even if the cross-section of the upper main reinforcement (22) is designed based on this, the negative moment section is reinforced by the tensile reinforcement (110) and the lateral extension (191).

[0092] Third, sagging of the deck plate can be effectively prevented before and after concrete pouring.

[0093] The above effect can be obtained through the spacing member (170) as described above.

[0095] Meanwhile, although an embodiment in which a beam reinforcing bar support member (100) is installed separately from the truss-type reinforcing bar assembly (20) has been described above, a beam reinforcing bar support member (190) may be formed by extending one end of the upper main reinforcing bar (22) of the truss-type reinforcing bar assembly (20) or by welding the upper main reinforcing bar (22).

[0096] That is, the beam reinforcement support (190) is formed at one end of the upper main reinforcement (22) so as to be supported by the beam reinforcement (1b) arranged inside the formwork (1a) to form a reinforced concrete support beam.

[0097] An example of the specific structure of the beam reinforcing bar support (190) is as described above, and this is intended to obtain an effect similar to the effect described above.

[0099] The foregoing merely describes some preferred embodiments that can be implemented by the present invention. As is well known, the scope of the present invention should not be interpreted as being limited to the above embodiments, and all technical concepts that share the fundamental principles with the technical concept of the present invention described above shall be considered to be included within the scope of the present invention. Explanation of the symbols

[0100] 1a : Formwork 1b : Beam reinforcement 2 : Crank 10 : Base plate 20 : Truss-type rebar assembly 21 : Lower main reinforcement 22 : Upper main reinforcement 23 : Lattice 24: Lower reinforcing steel 25 : Vertical reinforcement 100 : Beam reinforcement support member 110 : Tension reinforcement 120 : Upper extension 170 : Spacing part 171 : Lower extension 172 : Lower support 180 : Formwork support 181: Formwork vertical support 182 : Formwork side wall support 183 : Formwork side wall catch 190 : Beam rebar catch 191 : Lateral extension 192 : Beam reinforcement catch 193 : Beam reinforcing bar catch loop

Claims

Claim 1 A deck plate comprising a floor plate (10) on which concrete is poured to form a slab on top, which is mounted between a plurality of mutually spaced support beams, and a truss-type reinforcing bar assembly (20) installed on the upper part of the floor plate (10) to be embedded in the concrete, wherein the truss-type reinforcing bar assembly (20) comprises a lower main reinforcing bar (21) installed along the width direction, an upper main reinforcing bar (22) installed along the width direction on the upper part of the lower main reinforcing bar (21), and a lattice (23) connecting the lower main reinforcing bar (21) and the upper main reinforcing bar (22); a tension reinforcement member (110) joined by overlapping joint to one edge of the upper main reinforcing bar (22) to bear the tensile load occurring in the negative moment section of the slab; and a beam reinforcing bar formed at one end of the tension reinforcement member (110) to be supported by a beam reinforcing bar (1b) arranged inside a formwork (1a) to form a reinforced concrete support beam. A deck plate characterized by having a beam reinforcing bar support member (100) including a support member (190). Claim 2 A deck plate according to claim 1, wherein the beam reinforcing bar support member (190) comprises: a lateral extension member (191) formed extending to one side from one end of the tension reinforcing member (110); and a beam reinforcing bar catch member (192) formed by bending downward from one end of the lateral extension member (191) so as to be caught and supported on the side of the beam reinforcing bar (1b). Claim 3 A deck plate according to claim 1, wherein the beam reinforcing bar support member (190) comprises: a lateral extension member (191) formed extending to one side from one end of the tension reinforcing member (110); and a beam reinforcing bar catcher member (193) formed by bending into a loop structure at one end of the lateral extension member (191) to surround the lower part of the beam reinforcing bar (1b). Claim 4 A deck plate according to claim 1, further comprising: a formwork support member (180) formed at one end of the tension reinforcement member (110) so as to be supported by hanging on the side wall of the formwork (1a). Claim 5 A deck plate according to claim 1, characterized in that the beam reinforcing bar support member (100) further includes a spacing member (170) formed at the other end of the tension reinforcing member (110) to maintain a spacing between the floor plate (10) and the upper main reinforcing bar (22). Claim 6 A deck plate according to claim 5, wherein the spacing member (170) comprises: a lower extension member (171) formed extending downward from the other end of the tension reinforcement member (110); and a lower support member (172) formed at the bottom of the lower extension member (171) and installed to be supported by a pair of lower main reinforcement members (21) of the truss-type reinforcing bar assembly (20) or the floor plate (10). Claim 7 A deck plate comprising a floor plate (10) on which concrete is poured to form a slab on top, which is mounted between a plurality of mutually spaced support beams (1), and a truss-type reinforcing bar assembly (20) installed on the upper part of the floor plate (10) to be embedded in the concrete, wherein the truss-type reinforcing bar assembly (20) comprises a lower main reinforcing bar (21) installed along the width direction, an upper main reinforcing bar (22) installed along the width direction on the upper part of the lower main reinforcing bar (21), and a lattice (23) connecting the lower main reinforcing bar (21) and the upper main reinforcing bar (22), and wherein the deck plate comprises a beam reinforcing bar support portion (190) formed at one end of the upper main reinforcing bar (22) to be supported by a beam reinforcing bar (1b) arranged inside a formwork (1a) to form a reinforced concrete support beam.

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