JPH0547133U - Precast concrete board - Google Patents

Abstract

(57) [Abstract] [Purpose] A reinforced beam is composed of a high beam and a low beam, and the two types of reinforced beams are arranged alternately or in a desired order, and Since the ribs were constructed by embedding low reinforced steel beams in concrete, the ribs serve as a reinforcement and prevent bending due to load or strong wind to increase the strength. A precast concrete board in which reinforcing bar beams A such as three-dimensional truss beams are arranged in parallel at desired intervals, and lower chord members 1 of the reinforcing bar beams and a part of the thrust bars 2 are embedded in concrete 4. The rebar beams are composed of high-height beams and low-height beams, the two types of rebar beams are arranged alternately or in a desired order, and the low-height rebar beams are buried in concrete. The rib 5 is configured by

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a precast concrete board suitable as a floor material for buildings.

[0002]

[Prior Art]

 Conventionally, as a precast concrete plate using reinforcing bars such as three-dimensional truss beams (hereinafter simply referred to as “precast plates”), the lower chord material of the reinforcing bars and a part of the last reinforcement bars are buried in concrete at the factory. In the construction site, set this precast plate with the rusty side facing up or on the inside of the wall, then place reinforcement on the exposed side of the rusty and place concrete to place the composite slab. Or a formwork was installed after the reinforcement and used as a structural material of the wall member for pouring concrete to construct a wall surface and also as a formwork material.

[0003]

[Problems to be solved by the device]

 By the way, the above-mentioned conventional precast plate has a problem that, when it is used as a floor frame material that also serves as a structure, it is not possible to place a bridge concrete at long beam intervals without supporting work.

The present invention is intended to solve the above-mentioned problems, and an object of the present invention is to construct a rebar beam with a high beam and a low beam and to provide the two types. Since the reinforced steel beams are arranged alternately or in a desired order, and the ribs are constructed by embedding low-height reinforced steel beams in concrete, these ribs serve as reinforcement and long beams without supporting work. The purpose of the present invention is to provide a precast concrete plate that can be laid with concrete at intervals and structurally integrated with post-cast concrete to obtain a synthetic slab.

[0005]

[Means for Solving the Problems]

 The precast concrete board of the present invention is intended to achieve the above-mentioned object, and means for arranging reinforcing bars such as three-dimensional truss beams in parallel at desired intervals, and at the same time, lower chord members of the reinforcing bars and raster A precast concrete plate in which a part of the reinforcing bars is embedded in concrete, which is composed of a beam having a high height and a beam having a low height, and the two types of reinforcing bars are alternately or in a desired order. The ribs are constructed by embedding concrete reinforced steel beams with a low height and arranging them in a row.

[0006]

[Action]

 The precast concrete plate configured as described above can cope with the compressive force that is exerted when constructing a slab by straddling the precast concrete plates at long beam intervals without placing supports and placing the post-cast concrete. Also, by arranging reinforcing bars having different heights and always burying low reinforcing bars with concrete to form ribs, a precast concrete plate that can secure the covering with the upper bar of the slab is formed. Is.

[0007]

【Example】

 An embodiment of the precast concrete plate of the present invention will be described below with reference to the drawings. FIG. 1 shows a three-dimensional truss beam A, which is a type of rebar beam, and shows two lower chord members 1 and one upper chord member 3. The lower end and the upper end of the lasting muscle 2 formed in a corrugated shape are welded to each other. Then, as shown in FIG. 2, the three-dimensional truss beam A is formed by alternately arranging high and low heights of the reinforcement bars 2, or as shown in FIG. A is arranged for every two rows of the reinforcing beam A by the low-strength muscle 2.

Then, a part of the lower chord member 1 and the last reinforcement 2 of the reinforcing bar beams A arranged as described above is embedded in the concrete 4, and the last reinforcement 2 having a low height is embedded in the concrete and the rib 5 is formed. And As shown in the plan views of FIGS. 4 and 5, the precast concrete plate B configured in this manner has exposed rebar beams A and concrete ribs 5 alternately or between exposed rebar beams A. It becomes a precast plate on which two ribs 5 are formed.

As described above, the precast plate B manufactured in advance in the factory is transferred to the construction site, and at the construction site, the precast plate B is hung between the beams with the last streaks 2 (rib side) facing upward. The concrete pouring floor and slab are constructed after handing over and arranging the upper end.

In the precast plate B thus configured, the ribs 5 serve as reinforcement, and therefore, when the precast plate B is used as a floor material of a building, a long span slab is constructed without support. Is something that can be done.

[0011]

[Effect of the device]

 As described above, the present invention is composed of a beam having a high height and a beam having a low height such as a three-dimensional truss beam, and the two types of the reinforcing beams are arranged alternately or in a desired order, and Since the ribs were constructed by embedding a low-height reinforced beam with concrete, this rib serves as a reinforcement, and it is possible to place the upper slab concrete over a long span without supporting work. This has the effect of ensuring the cover thickness of the upper bar reinforcement to be accurately constructed.

[Brief description of drawings]

FIG. 1 is a perspective view of a truss beam.

FIG. 2 is a sectional side view showing an embodiment of the present invention.

FIG. 3 is a sectional side view showing another embodiment of the present invention.

FIG. 4 is a plan view of FIG.

FIG. 5 is a plan view of FIG.

[Explanation of symbols]

 A Reinforced beam B Precast concrete 1 Lower chord material 2 Rusty streak 3 Upper chord material 4 Concrete 5 Rib

Claims (1)

[Scope of utility model registration request] 1. A precast concrete plate in which reinforcing bars, such as three-dimensional truss beams, are arranged in parallel at desired intervals, and a lower chord member of the reinforcing bars and a part of the thrust bars are embedded in concrete. The beams are composed of high-height beams and low-height beams, the two types of rebar beams are arranged alternately or in the desired order, and the low-height rebar beams are buried in concrete. Precast concrete board characterized by having ribs.