JP2020033816A - Support structure and composite slab structure with support structure - Google Patents

Abstract

To provide a support structure capable of enhancing a transportation efficiency from a manufacturing site to a construction site, of being assembled and installed at the construction site easily, of improving workability and in addition of improving function of concrete and a composite effect, such as a strength and a crack prevention performance, and provide a composite slab structure with the support structure.SOLUTION: The support structure comprises a plurality of support members configured with a plate material or a wire material and arranged with an interval in one direction, and a reinforcement bar extending in one direction and coupling the plurality of support member. The composite slab structure comprises a wave shape steel plate with a wave shape cross section in which a crest surface part and a bottom surface part are connected alternately each other via an inclined surface part, the support structure for abutting an outer edge of the support member with the inclined surface part of the wave shape steel plate and installed on a top surface of the wave shape steel plate, a reinforcement metal gauze placed on a top surface of the support structure, and concrete installed on the top surface of the wave shape steel plate.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a support structure for supporting a reinforcing wire mesh and a composite slab structure provided with the support structure.

  Conventionally, in the composite slab structure, a reinforcing wire mesh such as a welded wire mesh supported by a support structure is installed on the upper surface of a corrugated steel sheet having a peak section and a valley bottom section alternately connected via an inclined section and forming a corrugated cross section, A configuration formed by casting concrete is known. The reinforcing wire mesh is installed as a reinforcing member of concrete (for example, a structural material or a crack expansion preventing line).

  For example, Patent Literature 1 has a configuration in which main reinforcing bars fixed to a predetermined height on a base such as a corrugated steel plate are arranged at equal intervals, and a welding wire mesh is disposed on the reinforcing bars. The main reinforcing bar is welded and fixed to a pair of lattice-shaped bent reinforcing bars, an upper bent portion of the bent bar, and is welded and fixed to a lower end of the pair of bent bars and a lower portion of each bent bar. And lower end muscles. At the lower end of each bent rebar, a support portion that expands outward is formed.

Japanese Utility Model Publication No. 5-42432

  A support structure as disclosed in Patent Document 1 is transported in an assembled state in a manufacturing process in order to quickly and easily perform on-site construction. In the main bar-arranged body having the above-described configuration, it is difficult to stack and transport a plurality of bodies, so that the transport efficiency is poor, and the transport is troublesome and costly. On the other hand, when assembling on site, labor is required and the construction is prolonged, which may increase the construction cost.

  The present invention solves the above-mentioned problems, and can improve the transfer efficiency from the manufacturing site to the construction site, and can be easily installed at the construction site, improve the workability, and further improve the strength. It is an object of the present invention to provide a support structure capable of improving the function and the synthesis effect of concrete, such as crack prevention performance, and a composite slab structure provided with the support structure.

  (I) The support structure according to the present invention is made of a plate or a wire, and is provided with a plurality of support members provided at intervals in one direction, and a reinforcing bar extending in the one direction and connecting the plurality of support members. And with.

  (Ii) The composite slab structure according to the present invention includes a corrugated steel sheet having a corrugated cross section in which a crest portion and a valley bottom portion are alternately connected via an inclined surface portion, and an outer edge of the support member on the inclined surface portion of the corrugated steel plate. The support structure of (i) placed on the upper surface of the corrugated steel plate in contact with the reinforcing wire mesh placed on the upper surface of the support structure, and the concrete cast on the upper surface of the corrugated steel plate And with.

  ADVANTAGE OF THE INVENTION According to this invention, since it is a simple structure which comprised only the support member and the reinforcement which were comprised by the board | plate material or the wire, it does not become bulky when transporting from a manufacturing site to a construction site, and can improve transport efficiency. Further, after being transported to the construction site, it is only necessary to install a support member at the bottom of the valley of the corrugated steel sheet, and the workability at the construction site can be improved. In addition, by integrating the reinforcing steel structure, concrete, and corrugated steel plate, the strength, function, and synthesis effect of the composite slab structure can be increased.

FIG. 2 is a perspective view showing a composite slab structure provided with a support structure according to Embodiment 1 of the present invention. It is the perspective view which showed the state which installed the support structure which concerns on Embodiment 1 of this invention on the corrugated steel plate. It is the front view which showed the state which installed the support structure which concerns on Embodiment 1 of this invention on the corrugated steel plate. FIG. 2 is a cross-sectional view of the composite slab structure including the support structure according to the first embodiment of the present invention. It is sectional drawing which showed the corrugated steel plate of the synthetic slab structure provided with the support structure which concerns on Embodiment 1 of this invention. It is the perspective view which showed the state which installed the support structure which concerns on Embodiment 2 of this invention on the corrugated steel plate.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference characters, and description thereof will be omitted or simplified as appropriate. Further, the configuration, size, arrangement, and the like of the configuration shown in each drawing can be appropriately changed within the scope of the present invention.

Embodiment 1 FIG.
First, a support structure 100 according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a composite slab structure provided with a support structure according to Embodiment 1 of the present invention. FIG. 2 is a perspective view showing a state where the support structure according to Embodiment 1 of the present invention is installed on a corrugated steel plate. FIG. 3 is a front view showing a state where the support structure according to Embodiment 1 of the present invention is installed on a corrugated steel plate. Note that FIG. 1 shows a state in which the support structure 100 of the present embodiment is omitted in order to easily explain the composite slab structure 200.

  As shown in FIGS. 1 and 2, the support structure 100 is installed on the upper surface of the corrugated steel sheet 5 having a corrugated cross section in which, for example, a crest 50 and a valley bottom 51 are alternately connected via an inclined surface 52. This is used to hold the wire net 6 at a predetermined height. The reinforcing wire mesh 6 is installed as a reinforcing member (for example, a structural material or a crack expansion preventing line) of the concrete 7 cast on the upper surface of the corrugated steel plate 5.

  As shown in FIGS. 2 and 3, the support structure 100 includes a plurality of support members 1 that are provided at intervals in one direction, and a reinforcing bar 2 that extends in the one direction and connects the plurality of support members 1. , Is provided. In the illustrated example, the one direction is the longitudinal direction in which the crest 50 and the valley bottom 51 extend.

  The support member 1 has a configuration in which a plate made of a steel plate having a thickness of about 5 mm is formed in a circular shape or an elliptical shape. The support member 1 is configured to have a size such that its upper portion protrudes upward from the crest surface portion 50 when disposed on the valley bottom surface portion 51 of the corrugated steel plate 5. The specific dimensions of the support member 1 are appropriately designed according to the installation position of the reinforcing wire mesh 6. By arranging the support member 1, the function and the combined effect of the concrete 7 such as the strength and the performance of preventing cracks can be enhanced. The interval between the support members 1 depends on the strength of the composite slab structure 200 and the like. However, the function of the concrete 7 can be further enhanced by reducing the interval and increasing the number of installed members. In addition, the support member 1 is not limited to the illustrated elliptical shape, and may be, for example, a polygonal shape, an inverted trapezoidal shape, or the like. In addition, the support member 1 is a steel material, but may be formed of, for example, a synthetic resin.

  Further, the support member 1 is formed with a penetrating shape 10 through which the reinforcing bar 2 passes. The penetrating shape 10 has a configuration in which upper and lower portions are cut out in a circular shape. Note that the penetrating shape 10 is not limited to the illustrated cutout hole, and may be a hole whose periphery is surrounded. Further, the penetrating shape 10 may be formed only on one of the upper part and the lower part of the support member 1. Further, a plurality of the penetrating shapes 10 may be formed on either the upper part or the lower part of the support member 1, or a plurality of the penetrating shapes may be formed on the upper part and the lower part.

  As shown in FIGS. 2 and 3, the reinforcing bar 2 includes an upper chord member 3 provided on an upper portion of the support member 1 and a lower chord member 4 provided on a lower portion of the support member 1. The reinforcing bars 2 integrally connect the plurality of support members 1. When the supporting structure 100 is used for the composite slab structure 200, the reinforcing bar 2 also functions as a reinforcing member (for example, a structural material or a crack expansion preventing bar) of the cast concrete 7, and the reinforcing bar 2 has a corrugated shape. It also has a function of enhancing the combined effect of the steel plate 5 and the support member 1 and improving the function of the combined slab. The reinforcing bar 2 may be fixed to the support member 1 by welding or the like, or may be simply inserted through the penetrating shape 10. In the case where the reinforcing shape 2 does not form the penetrating shape 10 in the support member 1, the upper chord material 3 is fixed to the upper surface of the support member 1 by welding or the like, and the lower chord material 4 is fixed to the lower surface of the support member 1 by welding or the like. It is fixed. The reinforcing bars 2 may be transported to the construction site in a state where they are attached to the support member 1 at the manufacturing site in advance, or may be attached to the support member 1 at the construction site. Although not shown in the drawings, the reinforcing bars 2 may be formed of only one of the upper chord 3 and the lower chord 4. Further, the upper chord material 3 and the lower chord material 4 are not limited to one illustrated, and two or more may be provided.

  As shown in FIG. 2, the upper chord material 3 is provided with an upward hook portion 3 a for hooking and fixing a reinforcing wire mesh 6 placed on the upper surface of the support member 1. A plurality of hook portions 3a are provided at intervals in the length direction of the upper chord material 3.

  As described above, the support structure 100 according to the first embodiment is formed of a plate material, and is connected to a plurality of support members 1 provided in one direction with an interval therebetween, and is connected to the plurality of support members 1 in one direction. Reinforcing bars 2 to be provided. In other words, the support structure 100 according to the first embodiment has a simple configuration in which only the support member 1 made of a plate material and the reinforcing bar 2 are used. Efficiency can be increased. Further, after being transported to the construction site, it is only necessary to install the support member 1 on the valley bottom portion 51 of the corrugated steel plate 5, and the workability at the site can be improved.

  Next, a composite slab structure 200 including the support structure 100 having the above-described configuration will be described with reference to FIGS. 1 to 3 and FIGS. 4 and 5. FIG. 4 is a cross-sectional view of a composite slab structure including the support structure according to the first embodiment of the present invention. FIG. 5 is a cross-sectional view showing a corrugated steel sheet having a composite slab structure provided with the support structure according to Embodiment 1 of the present invention.

  As shown in FIGS. 1 and 4, the composite slab structure 200 is mounted on the corrugated steel plate 5, the support structure 100 having the above configuration disposed on the upper surface of the corrugated steel plate 5, and the upper surface of the support structure 100. It comprises a reinforcing wire mesh 6 and concrete 7 cast on the corrugated steel plate 5. In addition, a reinforcing member may be added to enhance functions such as strength and crack prevention.

  As shown in FIG. 5, the corrugated steel sheet 5 includes a crest surface 50, a valley bottom 51 substantially parallel to the crest 50, and an inclined surface 52 connecting the crest 50 and the valley bottom 51. , A steel deck plate having a corrugated cross section in which the crest surface 50 and the valley bottom 51 are alternately connected. The dimensions of the corrugated steel sheet 5 are, for example, about 0.6 mm to 2.3 mm in thickness and about 50 mm to 120 mm (mountain height).

  The corrugated steel plate 5 is formed by arranging a plurality of plates each composed of two crests 50 and three valleys 51 and connecting the ends of the adjacent plates. Engaging portions 5a and 5b for connecting adjacent corrugated steel plates 5 are formed at both ends of the valley bottom portion 51 in the groove width direction. The adjacent corrugated steel plates 5 are integrally joined by engaging the engaging portions 5a and 5b with each other. As an example, the engagement portions 5a and 5b are bent upward and rise, and when one of the engagement portions 5a is placed on the other engagement portion 5b, the upper portion is bent so as not to be disengaged. It is.

  On each inclined surface portion 52 of the corrugated steel sheet 5, a ridge portion 53 protruding in parallel with the valley bottom portion 51 is formed at a position close to the valley bottom portion 51. A groove 54 is formed by the ridge 53 and the valley bottom 51. In addition, a plurality of embosses 55 are formed on each inclined surface 52 of the corrugated steel sheet 5. The emboss 55 is formed by, for example, pressing. The composite slab structure 200 can prevent the situation in which the concrete 7 cast on the upper surface of the corrugated steel sheet 5 goes around the concave groove 54 and the emboss 55 and hardens, so that the corrugated steel sheet 5 and the concrete 7 are displaced. , Yield strength and deformation performance can be increased.

  As shown in FIGS. 2 and 4, the support structure 100 having the above configuration is fitted into the valley bottom surface portion 51 with the outer edge of the support member 1 abutting against the inclined surface portion 52 of the corrugated steel plate 5. In the support structure 100, the reinforcing bars 2 are integrally attached to the support member 1, and positioning can be performed easily and accurately with the weight of the steel plate and the reinforcing bars. The reinforcing wire mesh 6 is, for example, a welded wire mesh formed by arranging reinforcing bars in a net shape and welding, and is installed on the upper surface of the support member 1. The reinforcing wire mesh 6 has a part of a reinforcing bar hung on a hook portion 3 a provided on the upper chord material 3, and is fixed so as not to sink or float when the concrete 7 is poured. The means for fixing the reinforcing wire mesh 6 to the upper surface of the support structure 100 is not limited to the hook portion 3a shown in the figure. For example, the reinforcing wire mesh 6 may be fixed to the upper chord material 3 by welding, or other means. May be. Further, the reinforcing wire mesh 6 is not limited to the welding wire mesh, and may be, for example, a deformed reinforcing bar.

  The concrete 7 is cast on the upper surface of the corrugated steel plate 5 on which the support structure 100 and the reinforcing wire mesh 6 are installed. The thickness of the concrete 7 depends on the use of the composite slab structure 200, but is, for example, about 50 mm to 300 mm from the top 50 of the corrugated steel sheet 5.

  As described above, the composite slab structure 200 including the support structure 100 according to the first embodiment includes the corrugated steel sheet 5 having the corrugated cross section in which the crest 50 and the valley bottom 51 are alternately connected via the inclined surface 52. And a support structure 100 provided on the upper surface of the corrugated steel plate 5 by bringing the outer edge of the support member 1 into contact with the inclined surface 52 of the corrugated steel plate 5, and a reinforcing wire mesh 6 disposed on the upper surface of the support structure 100. , Concrete 7 cast on the corrugated steel sheet 5. Therefore, in the composite slab structure 200, the support structure 100 can be installed only by disposing the support member 1 on the valley bottom 51 of the corrugated steel sheet 5, and the reinforcing wire mesh 6 can be easily installed at a predetermined height. This can contribute to shortening the construction period and reducing costs.

  In the composite slab structure 200 according to the first embodiment, since the outer edge of the support member 1 is brought into contact with the inclined surface 52 of the corrugated steel plate 5 and the support structure 100 is installed on the upper surface of the corrugated steel plate 5, The pulling action occurs in the groove width direction of the steel plate 5, and the engagement state of the engagement portions 5a and 5b can be made strong.

  Further, since the upper chord material 3 is provided with the hook 3a for hanging the reinforcing wire mesh 6 placed on the upper surface of the support member 1, the reinforcing wire mesh 6 can be firmly positioned and fixed.

  Further, since the composite slab structure 200 functions as both the support member 1 and the reinforcing member, the strength of the composite slab structure 200 can be increased. And since it is the structure integrated using many steel materials, the synthetic effect of the corrugated steel plate 5 and the concrete 7 can be improved by the reinforcing effect, and the function of a synthetic slab can be improved.

Embodiment 2 FIG.
Next, a support structure 101 according to Embodiment 2 of the present invention will be described with reference to FIG. FIG. 6 is a perspective view showing a state where the support structure according to Embodiment 2 of the present invention is installed on a corrugated steel plate. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  As shown in FIG. 6, a support structure 101 according to the second embodiment connects a plurality of support members 1 ′ provided at intervals in one direction to a plurality of support members 1 ′ extending in the one direction. Reinforcing bars 2 to be provided. In the illustrated example, the one direction is the longitudinal direction in which the crest 50 and the valley bottom 51 extend.

  The support member 1 'has a configuration in which a wire (for example, a reinforcing bar or the like) has a circular shape or an elliptical shape. The meridian of the support member 1 'is, for example, about 5 mm. The support member 1 ′ has such a size that its upper part protrudes upward from the peak part 50 when it is disposed on the valley bottom part 51 of the corrugated steel sheet 5. The specific dimensions of the support member 1 ′ are appropriately designed according to the installation position of the reinforcing wire mesh 6. By arranging the support member 1 ′, the function and the combined effect of the concrete 7, such as the strength and the ability to prevent cracking, can be enhanced. The interval between the support members 1 ′ depends on the strength of the composite slab structure 200 and the like. However, the function of the concrete 7 can be further enhanced by reducing the interval and increasing the number of installed members. Note that the support member 1 'is not limited to the illustrated elliptical shape, and may be, for example, a polygonal shape, an inverted trapezoidal shape, or the like. Further, the support member 1 'may be formed of, for example, a synthetic resin.

  A penetrating shape 10 for passing the upper chord 3 and the lower chord 4 as the reinforcement 2 is formed in the upper and lower portions of the support member 1 ′. The penetrating shape 10 may be formed only on one of the upper and lower portions of the support member 1 '. Further, a plurality of the penetrating shapes 10 may be formed on one of the upper and lower portions of the support member 1 ′, and a plurality of the penetrating shapes may be formed on the upper and lower portions.

  As described above, the support structure 101 according to the second embodiment is formed of a wire, and is provided with a plurality of support members 1 'spaced apart in one direction and a plurality of support members 1' extending in one direction. And reinforcing bars 2 for connecting the two. In other words, the support structure 101 according to the second embodiment also has a simple configuration including only the support members 1 ′ and the reinforcing bars 2 formed of a wire, and therefore does not become bulky when transported from a manufacturing site to a construction site. The transfer efficiency can be improved. Further, after being transported to the construction site, it is only necessary to install the support member 1 'on the valley bottom portion 51 of the corrugated steel plate 5, and the workability at the site can be improved.

  The composite slab structure 200 including the support structure 101 according to the second embodiment has the same effect as the composite slab structure 200 including the support structure 100 according to the first embodiment.

  Although the present invention has been described based on the embodiment, the present invention is not limited to the configuration of the above-described embodiment. For example, the dimensions and shape of the corrugated steel sheet 5 and the shapes of the engaging portions 5a and 5b are not limited thereto, and the design can be appropriately changed according to the site area, the installation interval of the support beams, the structural strength, and the like. . Further, the support members 1 and 1 ′ do not need to be all disposed on the valley bottom 51 as shown in the figure, and may be disposed on every other or every second valley bottom 51, for example. Further, the support structures 100 and 101 are not limited to the case where the support structures 100 and 101 are installed on the corrugated steel plate 5 described above, and can be used in other applications. In short, the present invention includes a range of design changes and application variations usually performed by those skilled in the art without departing from the technical idea thereof.

  1, 1 'support member, 2 reinforcement, 3 upper chord, 3a hook, 4 lower chord, 5 corrugated steel plate, 5a, 5b engagement, 6 reinforcing wire mesh, 7 concrete, 10 penetration shape, 50 mountaintop, 51 Valley bottom, 52 slope, 53 ridge, 54 groove, 55 emboss, 100, 101 support structure, 200 composite slab structure.

Claims (6)

A support member made of a plate material or a wire material, and a plurality of support members provided at intervals in one direction,
And a reinforcing bar extending in the one direction and connecting the plurality of support members.   The support structure according to claim 1, wherein the support member has a circular shape or an elliptical shape. A penetrating shape is formed in the support member,
The support structure according to claim 1, wherein the reinforcing bar is configured to be inserted into the penetrating shape to connect the plurality of support members. The reinforcing bar has an upper chord material provided on an upper portion of the support member, and a lower chord material provided on a lower portion of the support member,
The support structure according to any one of claims 1 to 3, wherein the plurality of support members are connected by the upper chord material or the lower chord material, or the upper chord material and the lower chord material.   The support structure according to claim 4, wherein the upper chord member is provided with a hook portion for hanging a reinforcing wire net placed on the upper surface of the support member. A corrugated steel sheet in which a peak section and a valley bottom section are alternately connected via an inclined surface section to form a corrugated cross section,
The support structure according to any one of claims 1 to 5, wherein an outer edge of the support member is in contact with the inclined surface portion of the corrugated steel sheet, and the support structure is installed on an upper surface of the corrugated steel sheet.
A reinforcing wire mesh placed on the upper surface of the support structure,
A concrete slab cast on the upper surface of the corrugated steel sheet.

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