JP2017002655A - Flat slab structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily secure a space extended in one direction along an undersurface of a slab.SOLUTION: One-way capitals 100, which support a flat slab 50, extend in an X-direction astride a plurality of columns 30 and lead to both wall parts, are arranged in parallel.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a flat slab structure.

  Patent Document 1 and Patent Document 2 disclose a building in which crossed beams protrude downward from the lower surface of the slab.

  In a building in which crossed beams protrude from the lower surface of the slab, a space extending in one direction along the lower surface of the slab cannot be secured. Therefore, for example, since air current such as cold air is blocked by the beam, it is difficult to flow in one direction along the lower surface of the slab, so that the air conditioning efficiency is lowered. Or when providing equipment piping and equipment wiring along one direction, it is necessary to make a through-hole for passing equipment piping and equipment wiring in a beam, or equipment piping and equipment wiring must get over a beam.

JP 2005-226349 A JP2011-269195A

  In view of the above-described facts, an object of the present invention is to easily secure a space extending in one direction along the lower surface of the slab.

  In the first aspect of the present invention, receiving portions that support the floor slab and extend in one direction across a plurality of columns and reach both wall portions are arranged in parallel.

  In the first aspect of the present invention, the receiving portion that supports the floor slab extends in one direction to reach both wall portions, and is arranged in parallel, so that it is disposed along the lower surface of the slab between adjacent receiving portions. Thus, a space extending in one direction is secured. And the flow path, equipment piping, equipment wiring, etc. which extend to one direction in this space can be arrange | positioned easily.

  According to a second aspect of the present invention, an air outlet from which cool air is blown out is provided on at least one of both wall portions between the adjacent receiving portions.

  In the invention described in claim 2, since the cool air smoothly flows between the adjacent receiving portions along the extending direction, the air conditioning efficiency is improved as compared with the case where there are crossed beams.

  According to a third aspect of the present invention, the receiving portion constitutes a lower portion of the receiving portion and a precast lower receiving portion on which the floor slab is spanned, and a concrete portion placed on the lower receiving portion, ,have.

  In invention of Claim 3, workability | operativity improves by utilizing the precast lower receiving part which comprises the lower part of a receiving part as a formwork at the time of placing a concrete part.

  Further, since the floor slab is stretched around the precast lower receiving portion, a support work for supporting the floor slab can be omitted or reduced.

  According to the present invention, a space extending in one direction along the lower surface of the slab can be easily secured.

It is a longitudinal cross-sectional view along the 1-1 line | wire of FIG. 4 which shows a flat slab structure. It is a perspective view which shows the internal structure of the building where the flat slab structure was applied. It is a longitudinal cross-sectional view along the X direction of the building shown in FIG. FIG. 4 is a horizontal sectional view (looking up) along line 4-4 in FIG. 3;

<Embodiment>
A flat slab structure according to an embodiment of the present invention will be described. In each figure, the vertical direction is indicated by an arrow Z, and two orthogonal directions in the horizontal direction are indicated by an arrow X and an arrow Y.

(Construction)
First, the structure of the building 12 to which the flat slab structure 10 according to the first embodiment is applied will be described.

  The building 12 of this embodiment shown in FIG. 2 and the like is a refrigerated warehouse or a refrigerated warehouse for the purpose of storing goods and the like at a low temperature. As shown in FIGS. 1, 2, and 3, the slab that partitions the upper and lower floors of the building 12 is a flat slab 50 that is not provided with a beam protruding from the lower surface.

  As shown in FIGS. 3 and 4, an inner wall 20 and an inner wall 22 along the Y direction are provided on both sides in the X direction of the low temperature warehouse 13 that stores goods and the like maintained at a low temperature inside the building 12. Yes. Moreover, as shown in FIG.2 and FIG.4, the inner wall 24 along the X direction is provided in the center part of the Y direction of the low-temperature warehouse part 13. As shown in FIG.

  As shown in FIGS. 1, 2, 3, and 4, the low-temperature warehouse 13 inside the building 12 is provided with a plurality of reinforced concrete columns 30. In addition, as shown in FIG. 1, a plurality of column main bars 32 and a plurality of shear reinforcement bars 34 are arranged in the column 30.

  As shown in FIGS. 2, 3, and 4, the one-way capital 100 extending in the X direction is provided in parallel in the low temperature warehouse 13 with an interval in the Y direction. The one-way capital 100 straddles a plurality of columns 30 and is joined to each column 30.

  As shown in FIGS. 3 and 4, the end of the one-way capital 100 in the X direction reaches the inner wall 20 and the inner wall 22 and is joined to the inner wall 20 and the inner wall 22.

  As shown in FIGS. 1, 2, 3, and 4, the one-way capital 100 has a substantially rectangular shape (flat shape) whose vertical cross-sectional shape along the Y direction is long in the lateral direction (Y direction). Yes.

  As shown in FIG. 1, the one-way capital 100 includes a precast plate 110 in which a recess 112 extending in the X direction is formed, and a concrete portion 120 placed on the precast plate 110 in the field. Yes. The precast plate 110 is embedded in the concrete portion 120 with a joint rebar 114 protruding from an end portion in the Y direction. A main bar 122 extending in the X direction is arranged on the upper portion of the concrete part 120 with an interval in the Y direction. Note that the precast plate 110 includes not only one manufactured at a factory but also site precast manufactured at a construction site.

  Further, main bars 122 extending in the X direction are also arranged in the precast plate 110 at intervals in the Y direction. In the present embodiment, the main reinforcement 122 of the precast plate 110 is arranged at a lower density than the main reinforcement 122 of the concrete portion 120 and is not arranged in the portion that contacts the column 30 of the precast plate 110. . The ends of the main bars 122 extending in the X direction are joined by a lap joint. It should be noted that the main bars may also be arranged and welded at the portion of the precast plate 110 that contacts the pillars 30.

  In the present embodiment, the precast plate 110 is divided along a broken line G shown in FIG. If it demonstrates from another viewpoint, the precast plate 110 is comprised by the some precast small plate 111 being connected to a X direction.

  As shown in FIG. 1, the flat slab 50 includes a board material 58 made of spun cleat and a topping concrete portion 54 placed on the board material 58. The board material 58 is spanned between the ends of the precast plate 110 of the one-way capital 100 and supported. In the topping concrete portion 54, main bars 56 extending in the X direction are arranged at intervals in the Y direction.

  Further, the reinforcing bars 60 extending in the Y direction are arranged at intervals in the X direction. The reinforcing bars 60 are arranged so as to straddle the concrete portion 120 of the one-way capital 100 and the topping concrete portion 54 of the flat slab 50 and penetrate the pillar 30.

  As shown in FIGS. 3 and 4, an air outlet 70 through which cool air blows out is provided at a portion of the inner wall 20 between the one-way capitals 100 adjacent to each other in the Y direction. As shown in FIG. 3, the air outlet 70 is disposed close to the lower surface 52 of the flat slab 50.

(Function and effect)
Next, the operation and effect of this embodiment will be described.

  As shown in FIGS. 2 and 3, a space 150 extending in the X direction along the lower surface 52 of the flat slab 50 is secured between the one-way capitals 100 adjacent in the Y direction. Then, the cold air blown out from the air outlet 70 into the space 150 flows in the X direction along the lower surface 52 of the flat slab 50. The arrow L represents the flow of cold air.

  Therefore, as shown in FIGS. 3 and 4, the cool air smoothly flows in the X direction along the lower surface 52 of the flat slab 50 through the space 150 between the adjacent one-way capitals 100. In addition, since the end of the one-way capital 100 in the X direction reaches the inner wall 20 and the inner wall 22 and is joined to the inner wall 20 and the inner wall 22, the cold air flows smoothly in the X direction without branching in the Y direction. . Therefore, the air conditioning efficiency is improved.

  Further, as shown in FIG. 3, when the cold air blown out from one inner wall 20 reaches the other inner wall 22, it flows downward along the inner wall 22, and further to one inner wall 20 along the upper surface 59 of the flat slab 50. And flows upward along the inner wall 20. Thus, air conditioning efficiency improves because cold air circulates smoothly.

  As shown in FIG. 1, the entire weight (lifting weight) of the one-way capital 100 can be reduced by configuring the lower part of the one-way capital 100 with the precast plate 110. The precast plate 110 is configured by connecting a plurality of precast small plates 111 in the X direction. Therefore, it is possible to suppress the necessary capacity of the heavy machinery for lifting the precast small plate 111. The overall weight may be reduced by installing a styro on the one-way capital 100 and forming a void.

  Moreover, workability | operativity improves by using the precast plate 110 in which the recessed part 112 was formed as a formwork at the time of placing the concrete part 120. FIG.

  By spanning the board material 58 made of spun cleat constituting the flat slab 50 to the precast plate 110, a supporting work for supporting the board material 58 can be unnecessary or reduced. Moreover, the support work which supports the precast plate 110 can also be reduced.

  The one-way capital 100 that supports the flat slab 50 is provided across the adjacent columns 30. Thereby, a ramen structure is formed with the pillar 30 and the one-way capital 100, the ramen structure can bear the horizontal force at the time of an earthquake, and the rigidity with respect to the horizontal force of the flat slab 50 increases.

  Since the one-way capital 100 has a substantially rectangular shape (flat shape) whose vertical cross section along the Y direction is long in the lateral direction (Y direction), it is only necessary to consider a long-term load as in the flat slab 50 (earthquake). The horizontal load at the time does not need to be considered much). Therefore, the main bars 122 of the precast plate 110 constituting the lower part of the one-way capital 100 can be reduced.

  Moreover, since the one-way capital 100 should consider only a long-term load, the edge parts of the main reinforcement 122 can be joined by a lap joint. And workability improves by lap jointing the reinforcement of the main reinforcement 122. Moreover, it is not necessary to make the precast plate 110 into a complicated shape like a mechanical joint by joining the ends of the main bars 122 to a lap joint.

  The present invention is not limited to the above embodiment.

  For example, the building 12 in which the cold air flows in the space 150 is a refrigerated warehouse or a refrigerated warehouse, but is not limited thereto, and may be a data center, for example.

  Further, for example, in the above embodiment, a space 150 extending in the X direction along the lower surface 52 of the flat slab 50 is secured between the one-way capitals 100 adjacent in the Y direction. The cool air flows in the X direction along the lower surface 52 of the flat slab 50. That is, the space 150 is used as a cool air flow path. However, the space 150 may be used as a flow path through which air for air conditioning (cold air, warm air, air for ventilation, etc.) flows. Furthermore, the space 150 may be used other than the flow path. For example, equipment piping and equipment wiring may be provided in the space 150. In addition, equipment piping is an air-conditioning duct, a water pipe, a gas pipe, a sewer pipe, etc. The facility wiring is an electric line, a signal line (LAN, Internet line, telephone line) or the like.

  Further, for example, in the above-described embodiment, the one-way capital 100 is configured by the precast plate 110 in which the recess 112 extending in the X direction is formed, and the concrete portion 120 placed on the precast plate 110. However, it is not limited to this. For example, it may be a one-way capital composed of concrete placed on site, or a one-way capital composed only of a precast version.

  1 and 4, only the one-way capital 100 extending in the X direction and having both ends reaching the inner wall 20 and the inner wall 22 is shown, but the one-way capital whose end does not reach the inner wall 20 and the inner wall 22 is shown. It may be provided. Moreover, if it is not provided in the space 150 between the adjacent one-way capital 100, the capital extended in a X direction may be provided.

  Furthermore, it cannot be overemphasized that it can implement with a various aspect in the range which does not deviate from the summary of this invention.

10 Flat slab structure 12 Building 20 Inner wall (an example of a wall)
22 Inner wall (an example of a wall)
30 pillars 50 flat slabs (an example of floor slab)
70 Air outlet 100 One-way capital (an example of a receiving part)
110 Precast version (lower receiving part)
120 Concrete part

Claims (3)

  A flat slab structure that supports the floor slab, extends in one direction across multiple pillars, and reaches both wall parts in parallel. At least one of both wall portions between the adjacent receiving portions is provided with a blowout port from which cool air blows out.
The flat slab structure according to claim 1. The receiving part is
A lower receiving part made of precast, which constitutes the lower part of the receiving part and on which the floor slab is stretched,
A concrete portion placed on the lower receiving portion;
have,
The flat slab structure according to claim 1 or 2.

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