JPH08312048A - Method of forming slab using arched pca panel, and arched pca panel used therefor - Google Patents

Abstract

PURPOSE: To form a firm slab by integrally incorporating adjacent arched PC panels with one another along a mother support member so as to form a shell structure before or after the arched PC panels are laid on the mother support member. CONSTITUTION: In a process of forming a slab with the use of arched PC panels 1, coupling parts 6 of the arched PC panels are coupled together so as to integrally incorporate the arched PC panels with one another before or after the arched PC panels 1 are laid on a mother support member such as a beam. Further, PC steel wires 8 are inserted through arched PC panels, and are stretched under tension so as to fasten the panels together, and accordingly, a load exerted to the arched PC panel is born by the PC steel wires 8, and accordingly, the firm slab can be formed. Thus, a load partly exerted is not born by a single arched PC panel, but all arched PC panels, thereby it is possible to prevent partial deterioration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a slab with an arch PCa plate and an arch P used in the method.
Regarding a Ca plate.

[0002]

2. Description of the Related Art As a method of constructing a slab, a method of constructing using a so-called half PCa (precast) slab plate is known. In this construction method, a PCa plate is erected on a beam for constructing a slab, and the PCa plate is used as a formwork for floor slab concrete to be subsequently placed, and is itself also used as a part of the slab. According to this construction method, slab concrete can be poured without the need for a formwork, so that the work efficiency can be improved.

In the above construction method, a flat half PC
a When forming a slab with a slab plate, the center part of the plate bends due to its own weight and the weight of the concrete for in-situ slab flooring. Therefore, increase the wall thickness of the center part to increase the strength, or It is necessary to support the lower part by supporting work such as a giraffe jack while suppressing the bending. However, these works are very inconvenient in terms of construction cost and work efficiency.

Therefore, in recent years, the arch PCa plate is used. The arch PCa plate is a slab plate formed of PCa concrete in an arcuate curved surface, while the slab plate is flat.

By forming the slab plate in an arc shape,
The vertical load applied to the slab plate (self-weight and the weight of the concrete for the slab floor) is dispersed into the horizontal load, and this horizontal load is supported by the beams that construct the slab plate. It is possible to solve the above-mentioned problem of bending without partially changing the shape or using a supporting work. In addition, it can be said that the structure uses the characteristics of concrete that it is weak in tension and strong in compression due to the arc shape.

FIG. 1 shows a construction example of a slab using a conventional arch PCa plate. The slab is mainly composed of a beam 3, an arch PCa plate 1 installed on the beam 3, and an arch PCa plate 1
It consists of floor slab concrete 4 placed above. The construction procedure is very simple. The arch PCa plate 1 is erected on the beam 3, and the reinforcing slab for the floor slab is laid on the erected arch slab 1 and various desired pipes are provided, and then the concrete 4 for the floor slab is used. Is hit on the spot to complete the slab.

The arch PCa plate is of a size suitable for transportation and processing. As shown in the top view of FIG. 2, a plurality of arch PCa plates 1 are formed according to the size of the slab to be constructed. Are laid in order and used.

[0008]

As described above, when the slab is constructed using the arch PCa plate, the stress causing the bending of the slab plate is applied to the entire slab due to the geometrical reason that the slab plate has an arc shape. Distributed over
Since the dispersed stress can be supported by the member for constructing the slab plate, there is an effect that the bending can be reduced as much as possible.

However, in a slab formed by a plurality of arch PCa plates, when the load is biased only to one part of the arch PCa plate due to the structural reason of the building in which the slab is used, etc. Only the applied arch PCa plate has to bear the load, and the deterioration of the arch PCa plate is caused by the remaining arch P of the same slab.
There was a problem that it was faster than the Ca plate.

The present invention has been made in view of the above problems, and in the construction of a slab using an arch PCa plate, the above-mentioned characteristics of the arch PCa plate are utilized and a load is applied to one part of the arch PCa plate in a biased manner. Even in such a case, a stronger slab construction method capable of bearing the load on all arch PCa plates and the arch PC used for the method
It is intended to provide a plate.

[0011]

According to the present invention, the arch P
When constructing a slab using a Ca plate, multiple arches P
There is provided a slab construction method characterized in that the arch PCa plates adjacent to each other along the support base material are integrated before or after the Ca plate is installed on the support base material.
Further, according to the present invention, an arch PC characterized by integrating adjacent arc-shaped portions of a plurality of arch PCa plates.
A plate is provided.

Here, it is preferable that a reinforcing member is provided on at least one end face in the longitudinal direction of any one of the arch PCa plates so as to constrain the shape of the end face.

For integration of the arch PCa plates, the arch PCa plates may be connected in advance and installed on the support base material, or the arch PCa plates may be installed on the support base material and then connected.

The support base material is a base material for supporting the slab, such as a beam, a pillar or a wall. As the means for unifying, the arch PCa boards may be molded by cast-in-place concrete, or they may be joined together by a known fastening method using a bolt and a jig. Alternatively, a hole may be preliminarily penetrated in the arch PCa plate in the longitudinal direction thereof, and a PC (prestressed) steel wire may be penetrated through the hole to be tensioned to be integrated.

[0015]

In the present invention, when the slab is constructed using the arch PCa plate, a plurality of adjacent arch PCa plates are integrated with each other to form the PCa plate into a shell. The shell-shaped arch PCa plate can disperse the load applied to the arch PCa plate and resist the same, so that it is possible to suppress the bending in the longitudinal direction as much as possible and form a stronger slab. be able to.
Further, by providing a reinforcing member on at least one end face in the longitudinal direction of the arch PCa plate so as to restrain the shape of this end face, it is possible to reduce the bending of the arch PCa plate in the direction in which the arc is opened.

[0016]

[Examples]
A preferred embodiment of the present invention will be described with reference to the accompanying drawings.

In the state shown in FIG. 2, as described in the conventional example, the plurality of arch PCa plates 1 are laid on the beam 3. Then, in the conventional construction method, reinforcing bars for forming the floor slab and placing concrete for the floor slab are placed from this state, but in the present invention, as the next work in the state of FIG. The arch PCa plate 1 is integrated.

The integrated arch PCa plate 1 is shown in FIG. The dotted line 6 is a connecting portion.

The arch slab 1 may be integrated after the individual arch slabs 1 are erected on the beam 3 as shown in FIG. It may be installed.

As an example of the connecting method, as shown in FIG. 5, if the PC steel wire 8 is penetrated through the arch PCa plate and is tensioned to be integrated, the load applied to the arch PCa plate is also affected by the PC steel wire 8. Since it can bear the load, a stronger slab can be formed. Since the plurality of integrated arch PCa plates can be regarded as a shell-shaped beam, even if a partial load is applied, this can be dispersed to all arch PCa plates to resist. In particular, when a bending force in the longitudinal direction is applied, the effect is remarkable as compared with the case where no integration is performed.

If a cover plate 7 as a reinforcing member as shown in FIG. 4 is provided so that both end faces of the shell are closed,
Since the shapes of the both end faces are constrained by the cover plate 7, the arch PC
It is possible to reduce the bending of the plate a in the direction of opening the arc. Since the bending in the direction of opening the arc occurs when a vertical load is applied to the arch PCa plate, it can be said that by providing the cover plate 7, it is possible to resist the vertical load. The lid plate 7 may be provided not only at both ends but also at a connecting portion when connecting the arch PC plates. Also, the lid plate 7 is
The arch PCa plate may be provided so as to partially close the both ends of the arch PCa plate without completely closing it. A wall may be used instead of the cover plate 7.

The auxiliary member is not limited to the cover plate 7, but may be reinforced by pulling both ends of the arc with a PC steel wire or the like.

[0023]

According to the present invention, adjacent arch PCa
By integrating the plates with each other, the load applied to them can be widely dispersed and resisted by all arch PCa plates. In other words, even if the load is partially applied,
The arch PCa plates can be loaded instead of only one arch PCa plate.
It is possible to prevent partial deterioration of the plate and to construct a stronger slab. Furthermore, by providing a reinforcing member on the end surface of the arch PCa plate, the resistance force to the bending in the direction of opening the arc of the arch PCa plate, that is, the vertical load that causes the bending increases, so that a stronger slab is formed. There is an effect that it can be formed.

[Brief description of drawings]

FIG. 1 Construction example of a conventional slab using an arch PCa plate

FIG. 2 is a plan view showing a state where an arch PCa plate is installed on a beam.

FIG. 3 is an embodiment of the present invention, in which a plurality of arches P
Perspective view with integrated Ca plate

FIG. 4 is another embodiment of the present invention, wherein an arch PCa is provided.
Perspective view of the cover plate on the plate

FIG. 5 is a perspective view showing still another embodiment of the present invention, in which an arch PCa plate is integrated with a PC steel wire.

[Explanation of symbols]

 1. Arch PCa board 2. Curved surface 3. Beam 4. Floor slab concrete 5. Pillar 6. Connection part 7. Cover plate 8. PC steel wire

Claims (3)

[Claims] 1. In construction of a slab using arch PCa plates, before or after erection of a plurality of arch PCa plates on a support base material, adjacent arch PCa plates are integrated along the support base material. The slab construction method characterized in that 2. An arch PCa plate characterized by integrating adjacent arc-shaped portions of a plurality of arch PCa plates. 3. The arch PCa plate according to claim 2, wherein at least one end face in the longitudinal direction of any one of the arch PCa plates is provided with a reinforcing member so as to constrain the shape of the end face.