JP2852626B2 - Construction method of slab using arch slab plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slab construction method, and more particularly to a slab construction method using a so-called arch slab plate.

[0002]

2. Description of the Related Art Various slab construction methods have been conventionally proposed. For example, in addition to a slab construction method in which a slab form is erected using a support between beams and concrete is poured on the slab form, a slab construction method is also used. A flat truss with resistance points welded to the stirrups, bottom streaks, and lattice bars is an inverted V-shaped triangular truss, which is used as a part of the main reinforcing bar, and a reinforcing steel panel with a thin iron plate for a scrapping form suspended by a spacer. , After laying this between beams, concrete slab construction method,
Further, use of a modified concrete half Pca plate has been proposed. However, in such a conventional slab construction method, in the method of placing concrete on the slab formwork, a large number of supports are required to support the load of the concrete, and it is necessary not to remove the slab formwork from the mold. However, construction work and finishing work on the floor cannot be started, and a large-span building may be structurally harsh in terms of structural mechanics, causing large deflections and cracks.

On the other hand, in the deck slab method, the formwork and reinforcing work can be greatly reduced, and the span can be unsupported up to, for example, 4 meters. Although it has the advantage of being able to be manufactured and transported even in a small factory, there is an inconvenience that the formwork iron plate is deformed at the time of panel lifting or laying, and it is necessary to avoid placing heavy objects during construction. . Further, in the method using the half concrete Pca plate, although the slab formwork can be omitted, a shoring work must be used, and when the temporary placing is performed, attention is paid to the weight, and especially, the lifting is performed so that no stress is applied to the central portion. There was a problem that it had to be carried in and laid.

Therefore, in recent years, a method of constructing a slab using a so-called arch slab plate formed on an arcuate curved surface made of precast concrete has been proposed.

FIGS. 1 and 2 show examples of slab construction using an arch slab plate. In FIG. 1, reference numeral 1 denotes an arch slab plate, which is formed to have an arc-shaped or parabolic curved surface 2 made of precast concrete. Stress may be previously introduced into the precast concrete by a PC steel wire or the like. The shape and size of the curved surface can be arbitrarily selected. Reference numeral 3 denotes a beam on which the arch slab plate 1 is erected, and a precast concrete portion 4 is provided in a lower half portion of the beam 3 in the axial direction, and both ends of the arch slab plate 1 are inserted only into the precast concrete portion 4, for example. Let's support. The arch slab plate 1 has a thickness of, for example, 60 mm, and these are sequentially supported on the precast concrete portion 4 to form a floor support surface of each floor as shown in FIG.
Reference numeral 5 denotes a column supporting each of the beams 3, 6 denotes a corridor juxtaposed on the floor support surface, and 7 denotes a balcony. Further, in FIG. 1, reference numeral 8 denotes concrete for a slab floor which is cast after reinforcing bars are arranged on the arch slab plate 1. In this manner, when the slab is constructed using the arch slab plate, the following effects can be obtained.

Both ends of the arch slab plate 1 are supported between a pair of beams 3 shown in FIG. 1, between the beam 3 shown in FIG. 3 and the upper end of the precast concrete load-bearing wall 9, or between the columns 5 shown in FIG. Because it is erected on its own, it can withstand these loads satisfactorily even if it receives the weight of the concrete for slab floors cast on the top, not to mention its own weight. it can. Therefore, it is possible to prevent the slab from being bent or cracked. In addition, the simple structure using a thin precast plate allows the weight of its own weight and the load of the concrete struck on the top to be evenly distributed over the entire length without any support, so that the work space below And the simultaneous operation of the upper and lower slab floors is possible. Further, since the arch slab plate is formed by precasting, a smooth finished surface can be obtained, so that the arch slab plate can be used as floors and ceilings of hotels, houses and the like.

[0007]

The vertical load applied to the arch slab plate (for example, its own weight or the weight of the concrete for the cast-in-place slab floor) is dispersed to the force in the direction in which the arc is opened (of course, all the arches). Not the load), so both ends of the arc of the arch slab plate and the beam, column or wall supporting the arch slab plate (hereinafter referred to as the supporting base material)
, A horizontal force acts. Therefore, when constructing a slab using an arch slab plate, it is necessary to design and construct a supporting base material on which the slab is erected so as to endure the horizontal force. By the way, as shown in FIG. 3 (example of completed slab construction), when arch slab plates are continuously constructed, the load-bearing wall 9 at the both ends and the beam 3
, The horizontal force acts, but the horizontal force acting by the arch slab plates 1 and 1 ′ is not exerted on the intermediate load-bearing wall 9 ′ because the horizontal force acts on the intermediate wall.
Therefore, it is not necessary to add the above-mentioned durability design to the horizontal force to the intermediate supporting base material. However, in the process of actually constructing the slab, it is very difficult to simultaneously perform construction of the arch slab plate 1 and construction of the arch slab plate 1 ′.

Therefore, at the stage of erection of the arch slab plates, the horizontal force acts on the intermediate supporting base material, so that the strength which can endure the horizontal force is eventually obtained. There was a problem that it was necessary to add to the supporting base material located in the middle.

The present invention focuses on the above-mentioned problems, and when constructing a slab using an arch slab plate, when the arch slab plate is erected on a supporting base material, the arch slab plate is connected to the supporting base material. The horizontal force that acts
An object of the present invention is to provide a method of constructing a slab using an arch slab plate that is constructed so as not to bear directly on a supporting base material.

[0010]

According to the present invention, there is provided a method for constructing a slab by constructing a plurality of arch slab plates by continuously supporting the arch end surface in a direction in which the arch end surfaces are adjacent to each other and constructing the slab. A step of stretching a tension member between the supporting base materials where the plate is erected, a step of laying the arch slab plate between the supporting base materials, and a step of removing the tensile member,
A method for constructing a slab using an arch slab plate is provided. In the present invention, the tension member may be stretched between arch ends of an arch slab plate.

The tension member has attachment portions at both ends thereof, and is a member that can withstand when both ends are pulled, and is preferably a tie bar. The supporting base material is a base material that supports a slab, such as a beam, a column, or a wall. The supporting portion refers to a fulcrum at which the supporting base material supports an arch slab plate.

[0012]

According to the present invention, a tension member is previously stretched between support base materials on which an arch slab plate is erected, so that the horizontal force acting on the support portion when the arch slab plate is erected is reduced by the tension. The members also bear the burden.

Therefore, during the slab construction, the horizontal force acting on the supporting base material itself can be reduced.

Similarly, when the tension member is stretched inside both ends of the arc of the arch slab plate, the horizontal force acting on the supporting portion of the supporting base material when the arch slab plate is erected is also used. By directly loading the tension member,
A horizontal force can be hardly applied to the supporting base material.

[0015]

An embodiment of the present invention will be described below with reference to FIGS.

FIG. 3 shows an embodiment (completed view) in which two arch slab plates are continuously installed and a slab is constructed. In this embodiment, the vertical load applied to the arch slab plates 1 and 1 'is borne by the load-bearing walls 9 and the beams 3, and the load-bearing wall 9' located in the middle is provided with a horizontal load by the arch slab plates 1 and 1 '. Since the forces cancel each other, no horizontal force is applied. However, since the arch slab plates are individually erected during construction, the offset does not occur, and the horizontal force is applied to the load-bearing wall.

The construction method of the construction example shown in FIG. 3 will be described with reference to FIG. Before laying the arch slab plate 1 ', a tie bar (joining rod) 1
0 is stretched between the bearing walls 9, 9 '. Thereafter, the arch slab plate 1 'is erected between the bearing walls 9, 9'. At this time, the horizontal force acting on the load-bearing walls 9, 9 ′ due to the vertical load applied to the arch slab plate 1 ′ is borne by the tie bar 10. Has little effect. Next, the arch slab plate 1 is erected on the beam 3 and the load-bearing wall 9 ', and concrete for slab floor is simultaneously or individually cast on the upper surface and the upper surface of the arch slab plate 1' erected earlier. To complete. The concrete may be cast on the upper surface of the arch slab plate 1 ′ before the arch slab plate 1 is erected.

After the slab is completed, the tie bar 10 is removed.
At this time, the horizontal force of the arch slab plates 1 and 1 'cancels each other on the load-bearing wall 9', so that the horizontal force does not continue to act. However, a horizontal force acts on the load-bearing wall 9 and the beam 3. Further, as another embodiment, the same effect can be obtained by extending the tie bar 10 with the turnbuckle not between the columns 5 but between both ends of the arc of the arch slab plate 1 (not shown). The height of the arch slab plate can be adjusted by tensioning the turnbuckle.

In the above embodiment, the bearing wall 99 'shown in FIG.
Although the description has been given on the basis of the interval, the present invention is also applicable to the case where the construction is performed by using the space between the columns, the space between the beams as shown in FIG.

[0020]

As described above, according to the construction method of the present invention, the tension member is stretched in advance between the supporting base materials so that the supporting portion of the supporting base material is supported when the arch slab is erected. Since the acting horizontal force can be borne by the tension member, the force hardly acts on the supporting base material.

[0021] Therefore, in the case where an arch slab plate is erected continuously in particular, it is not necessary to newly add a specification that withstands the above-mentioned force when designing the supporting base material located in the middle. The design work can be simplified and the construction cost can be reduced.

Incidentally, the tension member may be extended inside both ends of the arc of the arch slab plate. In this case, the same effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a construction example of a slab using an arch slab plate.

FIG. 2 is a plan view showing a situation where an arch slab plate is laid on a structure.

FIG. 3 is a construction example of a slab using an arch slab plate showing another embodiment different from that of FIG. 1;

FIG. 4 is an embodiment view of a construction method according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Arch slab board 1 'Arch slab board 2 Curved surface 3 Beam 4 Precast concrete part 5 Column 6 Corridor 7 Balcony 8 Cast-in-place slab concrete 9 Bearing wall 9' Bearing wall 10 Tie bar with turnbuckle

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04B 5/43 E04B 5/32 E04B 5/38 E04C 3/26 E04G 21/12

Claims (2)

(57) [Claims] An arch end face is adjacent to a plurality of arch slab plates.
Support the arch end face continuously in the contact direction
In the method of constructing the slab, the arch slab
A step of stretching a tension member between supporting base materials to be erected;
Laying a steel slab plate between supporting base materials;
Removing the member.
Slab construction method using slabs . 2. The arch member of an arch slab plate, wherein :
2. The method according to claim 1, wherein the end is stretched between the ends.
Slab construction method using slabs .