JP2733560B2 - Slab construction method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a slab construction method that is constructed by post-casting, such as a slab inside a core and between cores in a core plan architectural structure. is there.

[Conventional technology]

Recently, in the construction of the core plan, a design has been studied in which a slab of a part of the core is integrated with the core itself as a reinforced concrete structure, and the core bears a horizontal force. In terms of construction, it is common to construct the core 3-4 floors ahead of the general floor, and the core 3 and the core 3 are shifted by at least one floor relative to the slab 2 of the general floor 1. (See FIG. 8). Some cores have a staircase or pipe space inside.

[Problems to be solved by the invention]

However, as shown in FIG. 7, it is necessary to extend anchoring streaks from the core wall in order to fix the peripheral portion of the slab to be built to the core wall 5, so that the anchor streaks 6 are previously set when the core is built (a reinforced concrete structure). Complicated labors of embedding and extracting at the time of slab construction are required.
Further, when the lower surface of the slab of the core 3 is constituted by the half precast concrete floor plate 7, it is necessary to increase the thickness of the half precast concrete floor plate because the center bends. Therefore, the trouble that the support material 8 must be used also occurs. Also, since the half precast concrete floor plate 7 is bent and the end portion is separated from the core wall, the receiving material 9 provided on the core wall 5
Had to be thicker.

Therefore, the present invention, when building a core and a slab between the cores using a half precast concrete floorboard as described above, without increasing the thickness of the floorboard or using the above-described labor such as using a support material, It is an object of the present invention to provide a half precast concrete floor plate, and to provide a slab together with a general floor by forming a half precast concrete floor plate on a lower surface of a slab such as a core and a core.

[Means for solving the problem]

The present invention has been made in view of the above problems,
When providing a slab of a reinforced concrete structure, a receiving material is attached to a wall via a buried plate provided at the time of construction of the wall, and an arch-shaped precast concrete projecting upward in the center to a receiving material of an opposing wall. The object of the present invention is to provide a slab construction method characterized by performing concrete work of a slab after performing a predetermined operation such as laying a floor plate and arranging a slab or piping a facility, thereby solving the above-mentioned problem.

(Operation)

In the present invention, when an arch-shaped half precast concrete floor plate is stretched over the receiving material of the opposing wall, the half precast concrete floor plate is deformed so as to be spread by its own weight or the like, firmly hits the wall, and is firmly supported by the receiving material. Will be done. Then, the half precast concrete floor plate constitutes the lower surface of the slab, and a predetermined operation before slab placement such as slab arrangement, facility piping, etc. can be performed on the floor plate.

That is, in the related art in which a flat half-precast concrete floor plate is bridged, a central portion is largely dropped due to bending as shown below, and a support is required. To reduce deflection, it is necessary to increase the thickness.

On the other hand, when the arch-shaped half precast concrete floor plate is laid, the moment does not decrease extremely, but the outward force H from the floor plate to the side (core wall side).
Occurs.

[Embodiment] Next, the present invention will be described in detail based on an embodiment shown in FIGS.

In the present invention, in order to construct the slab 4 inside the core 3 and between the cores 3 together with the slab of the general floor, first, as shown in FIG. Is mounted in advance and concrete is cast, and the burying plate 11 is buried in the opposing core wall 5. Then, a receiving material 13 having a loose hole 12 corresponding to the insert 10 of the burying plate 11 is fixed by bolting. The receiving material 13 is a vertical loose hole
Because of the provision of 12, the mounting error can be absorbed in mounting the receiving material 13.

Next, as shown in FIG. 5, an arch-shaped half precast concrete floor plate 14 having a central portion protruding upward is laid between the core walls 5 over a plurality of receiving members 13. The central portion 14a of this half precast concrete floor plate 14
As shown in FIG. 6, the height is set to be lower than the floor surface by the slab thickness a. When the half precast concrete floor plate 14 is erected between the cores 3, the wall gutter between the cores 3 is used. 15 and the center are the same height.

After the half precast concrete floorboard 14 is erected, the slab of the general floor is subjected to predetermined work, such as slab arrangement and equipment piping, and then concrete is poured into the half precast concrete floorboard 14 to perform the work.
A slab is constructed with 14 as the lower surface of the slab. In the slab arrangement, the reinforcement parallel to the core wall is disposed so as to pass over the wall garter, and the reinforcement extending between the core walls is bent at the end to enhance the integration with the concrete. In the illustrated embodiment, four half precast concrete slabs are erected, but the present invention is not limited to this. The number of sheets may be two or more.

〔The invention's effect〕

As described above, according to the present invention, in providing a slab of a reinforced concrete structure, a receiving material is attached to a wall via a burying plate provided at the time of construction of the wall,
Since the arched precast concrete floor plate with the center protruding upward is bridged over the receiving material of the opposing wall, and after performing predetermined work such as slab arrangement and equipment piping, concrete slab casting is performed, It is not necessary to increase the thickness of the support material or the half precast concrete floorboard, and the workability when constructing a post-cast slab such as within the core and between the cores is good. And since the deformation of the half precast concrete floor plate works on the safe side at the time of construction, and because the receiving material is attached to the buried plate, it is safe even when the buried plate has no protrusion and it is not used . In addition, there is an effect that is excellent in practicality, for example, a buried piping space is obtained above both ends of the half precast concrete floor plate.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a cross section between cores according to an embodiment of a slab construction method according to the present invention, FIG. 2 is an explanatory view showing the degree of engagement between a half precast concrete floor plate and a receiving material, and FIG. FIG. 4 is an explanatory view showing a receiving material, FIG. 5 is an explanatory view showing an installed state from above, and FIG. 6 is an explanatory view showing a height relationship between a wall garter and a half precast concrete floor plate. FIG. 7 is an explanatory view showing a conventional example, and FIG. 8 is a plan view showing a building with a core plan. 3 ... Core 4 ... Slab 5 ... Core wall 11 ... Buried plate 13 ... Receiving material 14 ... Half precast concrete floor plate

Claims (1)

(57) [Claims] When a slab having a reinforced concrete structure is provided, a receiving material is attached to a wall via a burying plate provided at the time of construction of the wall, and the center of the receiving material of the opposing wall projects upward. A slab construction method characterized by carrying out arched precast concrete slabs, performing predetermined work such as slab reinforcement and equipment piping, and then placing concrete in the slab.