JPH0688393A - Flat plate construction - Google Patents

Abstract

PURPOSE:To make strong connection in a connection section between panels without forming any step in the bottom between panels. CONSTITUTION:A beam panel 2 is bridged between capitals, and floor panels 3 are built between the beam panels 2. The floor panel 3 forms a plurality of ribs 3a lengthwise thereon, and dowel bars 3b are projected toward the beam panel 2 side from the ends of the ribs 3a. A prefabricated beam reinforcement A or an unbonded PC steel wire 15 is arranged on the beam panel 2. A prefabricated beam reinforcement B or an unbonded PC steel wire 16 is arranged on the upper part of a connection section between the floor panels 3. In addition, upper end bars are arranged on the upper parts of both panels 2 and 3, and a cast-in-place concrete 13 is placed on both panels 2 and 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat plate structure such as a flat slab directly supported on a column.

[0002]

2. Description of the Related Art In a conventional flat plate, a floor formwork is arranged between columns, a floor reinforcing bar is arranged in the formwork, and then on-site concrete is poured, and after the concrete is hardened, it is demolded. Although it was constructed, it requires a floor form material as a temporary construction, and temporary construction work such as temporarily supporting the floor form material and the work space will be narrowed due to the formwork, which requires construction period and cost. There was a problem.

In the past, in order to reduce the construction period and cost, for example, a construction method described in Japanese Patent Publication No. 4-2743 has been proposed. This consists of bridging the pillar row panels between the horizontal slabs, which are integrated with the stigmas, and further bridging the floor panels between the pillar row panels, and arranging the floor reinforcing bars on the floor panels. Later, on-site concrete is cast on the panel to build a flat plate.

A plurality of ribs are formed on the upper surfaces of both panels along the bridging direction.

[0005]

However, since the flat plate constructed as described above is installed so that the end portion of the floor panel is placed on the pillar row panel, the joint portion thereof is provided. A step is formed on the lower surface,
Since no joint means is implemented at the joint, the joint at the joint between the two panels is weak.

An object of the present invention is not to form a step on the lower surface between the panels and to strengthen the joint at the joint between the panels.

[0007]

In order to achieve the above object, the flat plate structure of the present invention has a beam panel bridged between stigmas with their axes oriented in the same direction, and between the beam panels. A floor panel that is erected, and a rib that faces the panel side for the beam is formed on the upper surface of the floor panel, and a joint bar that projects from the rib end surface of the floor panel toward the panel side for the beam,
One direction pre-assembled beam reinforcing rod and unbonded PC steel wire disposed on the beam panel in the bridge direction, and the other direction pre-assembled beam disposed toward the column at the joint between floor panels. It is characterized in that it is provided with a reinforcing bar and unbonded PC steel wire, and on-site concrete cast on both panels, and that a hollow portion is provided between the ribs of the floor panel.

[0008]

[Operation] Since the joint bar projecting from the floor panel and the pre-assembled beam rebar arranged on the beam panel are connected, and the unbonded PC steel wire reinforces the joint section, the joint section of both panels. Will be stronger than before. Further, the joining portion between the floor panels is also connected with the pre-assembled beam rebar and the unbonded PC steel wire, and is stronger than before.

Further, since the end portion of the floor panel is not placed on the beam panel but is connected to the beam panel via the joint as described above, the floor panel and the beam panel are joined together. The lower surface becomes flat without forming a step. In addition, the flat plate to be constructed is made lighter by forming a space, that is, a hollow part, by means such as bridging a discarded formwork between a plurality of ribs formed in parallel with the floor panel. At the same time, the hollow portion is provided as an installation space for equipment such as wiring and piping arranged in the slab and the ceiling.

[0010]

Embodiments of the present invention will be described with reference to the drawings.
First, the structure will be described. As shown in FIG. 3, beam panels 2 made of PC plates are bridged between the stigmas 1 with their axes oriented in the same direction.
A floor panel 3 made of C plate is installed.

The floor panel 3 has a plurality of ribs 3a arranged in parallel along the longitudinal direction on the upper surface thereof, and a dowel bar 3b which is a joint bar from the end surface of the rib 3a toward the beam panel 2 side. Each is protruding. As shown in FIG. 1, the floor panel 3 is arranged between the beam panels 2 so that the lower surface thereof has the same height as the beam panel 2.

Further, a plurality of lower end reinforcing bars 4 are embedded in the beam panel 2 along the longitudinal direction, and a plurality of ribs 5 are arranged so as to connect the plurality of lower end reinforcing bars 4. ing. Both ends of each rib 5 project upward, and a beam upper end strut 6 along the beam panel 2 is provided above the ribs 5.
Are reinforced, and further are connected by a cap tie 7 so that the front beam reinforcement A is reinforced.

Above the beam panel 2, an unbonded PC steel wire 15 is provided along the longitudinal direction of the beam panel 2.
Is provided. In addition, as shown in FIG. 2, beam upper and lower rebars 8 and 9 are also arranged along the longitudinal direction of the floor panel 3 at the upper part of the joint between the floor panels 3, and the upper and lower rebars 8 and 9
A plurality of ribs 10 are arranged at predetermined intervals so that the pre-assembled beam rebar B is arranged.

An unbonded PC steel wire 16 is arranged above the floor panel 3 along the longitudinal direction of the floor panel 3. Further, a plate-shaped discarding mold 11 is arranged so as to connect the upper portions of the ribs 3 a of each floor panel 3, and a hollow portion 14 is formed below the discarding mold 11. The hollow part 1
4 has a function of reducing the weight of the flat plate itself, and is also used as a space for arranging piping / wiring for equipment.

Further, the upper end streaks 12 are provided on the upper portions of both panels 2 and 3.
Is reinforced, and on-site concrete 13 is placed on both the panels 2 and 3. In the construction of the flat panel having the above-described configuration, the beam panel 2 is bridged between the stigmas 1, the floor panel 3 is installed between the beam panels 2, and the beam panel 2 and the floor panel 3 are preassembled. The beam reinforcements A and B and the unbonded PC steel wires 15 and 16 are laid out, and after the discarding formwork 11 and the upper end reinforcement 12 are arranged, the site concrete 13 is placed to construct.

In the flat plate structure as described above,
No step is formed on the lower surface of the joining portion between the panels 2 and 3, and the joining between the panels 2 and 3 is strengthened. Further, by using the PC panel, it is possible to improve quality and shorten the construction period.

[0017]

As described above, in the flat plate structure of the present invention, an unbonded PC steel wire is joined between the panels and in the flat beam without forming a step on the lower surface of the joint between the panels. By arranging
It has the effect of becoming stronger than before.

Further, by providing the hollow portion, the weight can be reduced, and the hollow portion can be used as a space for wiring, piping and the like.

[Brief description of drawings]

FIG. 1 is a side view showing a joint portion between floor panels having a flat plate structure according to an embodiment of the present invention.

FIG. 2 is a plan view showing a state in which a beam panel and a floor panel according to an embodiment of the present invention are installed.

FIG. 3 is a side view showing a joint portion between a beam panel and a floor panel having a flat plate structure according to an embodiment of the present invention.

[Explanation of symbols]

 1 Pillar Head 2 Beam Panel 3 Floor Panel 3a Rib 3b Dowel Bar (Joint Bar) 4 Bottom Bar Embedded in the Beam Panel 5 Rib Bar 6 Beam Top Bar 7 Cap Tie 8 Beam Bottom Bar 9 Beam Top Bar 10 Rib Bar 13 On-site concrete 14 Hollow part 15,16 Unbonded PC steel wire A Pre-assembled beam rebar in one direction B Pre-assembled beam rebar in other direction

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masami Ota 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Within Taisei Corporation (72) Inventor Yasuhiro Hayab 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo No. Taisei Construction Co., Ltd.

Claims (1)

[Claims] 1. A floor panel which is bridged between stigmas with their axes oriented in the same direction, and a floor panel which is erected between the beam panels and has ribs formed on the upper surface toward the beam panel side. And a joint bar protruding from the rib end surface of the floor panel toward the beam panel side, and a unidirectional pre-assembled beam rebar and unbonded PC steel wire arranged on the beam panel in the bridging direction And the other direction of the pre-assembled beam rebar and the unbonded PC that are arranged toward the column at the joint between the floor panel and
A flat plate structure comprising a steel wire and on-site concrete cast on both panels, and a hollow portion provided between ribs of the floor panel.