JP3024519U - Precast concrete board for composite floorboard construction - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide a precast concrete board for constructing a synthetic floorboard, which can be easily manufactured in a factory and can be constructed with a long-span synthetic floorboard. SOLUTION: A main body 1 which is flatly molded with concrete
In addition, a plurality of truss muscles 2 extending in the longitudinal direction of the main body 1
The bottom part is embedded in the concrete of the main body 1 at an appropriate interval in the width direction, the top part is exposed, and P
Prestressing is introduced by the C steel material 3 by the pretensioning method.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a precast concrete board for constructing a synthetic floorboard.

[0002]

[Prior art]

 In a precast concrete board for composite floorboard construction, a plurality of ridges extending in the lengthwise direction are formed on the upper surface of a flat plate-like main body, and the upper chord streak is exposed upward in the concrete at the ridge position so that the truss reinforcement A structure in which an embossed steel material for introducing prestress is disposed along with being buried is conventionally known (see Japanese Utility Model Publication No. 62-96411).

When a ridge is formed on the main body as in this conventional example, the main body has a large section modulus and an increased bending strength, so that it is possible to construct a synthetic span plate with a long span, but a precast concrete plate. There is a problem in that it takes a lot of time and labor to form the ridges when manufacturing the slab.

[0004]

[Problems to be solved by the device]

 Problem to be solved by the present invention, that is, an object of the present invention is to provide a precast concrete board for a composite floor board structure, which is easy to manufacture in a factory and which can construct a long-span composite floor board. To do.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the precast concrete plate for constructing a synthetic floorboard of the present invention, a plurality of truss bars extending in the longitudinal direction are appropriately spaced in the width direction of the main body, which is formed into a flat body made of concrete. Then, the lower part is embedded in the main body of the concrete, the upper part is exposed, and the prestressing is introduced by the pretensioning method.

[0006]

[Embodiment of device]

 1 and 2 showing an embodiment of the present invention, 1 is a main body of a precast concrete plate for constructing a synthetic floorboard that is flatly molded with concrete, 2 is a truss attached to the main body 1, and 3 is a main body It is a PC steel material embedded in 1.

The truss reinforcement 2 shown in the figure consists of a reinforcement 4 which is bent in a wave shape and linear reinforcements 5 and 6 which are arranged above and below, and a plurality of the reinforcements 4 are arranged at appropriate intervals in the width direction of the main body 1. The trusses 2 are lined up, the lower part of each truss 2 is embedded in the concrete of the main body 1, and the upper part is exposed upward.

The truss reinforcement 2 is not limited to that shown in the figure, and may be, for example, a space truss.

The PC steel material 3 is embedded in the concrete in a tension state when the main body 1 is molded in order to introduce prestress to the main body 1 by the pretensioning method.

By introducing prestress to the main body 1 with the PC steel material 3, prestress is also applied to the muscle 4 through the muscle 3, and the main body 1 is the lower end material and the muscle 4 is the upper chord material. The bending strength of the body is increased.

The usage of the precast concrete board for constructing a synthetic floorboard according to the present invention is similar to that of the above-mentioned conventional example. After this is installed between beams as a formwork, a cast-in-place concrete 7 is placed on it. It can be placed (see Fig. 3).

Reference numeral 8 denotes a buried mold made of a lightweight material such as Styrofoam, which is laid on the upper surface of the main body 1 before the cast-in-place concrete 7 is placed, so that a synthetic floorboard having a hollow structure is formed. Can be easily formed.

[0013]

EFFECTS OF THE INVENTION The precast concrete plate for constructing a synthetic floorboard of the present invention has a flat main body and does not have a ridge on its upper surface unlike the above-mentioned conventional example, so that it is easy to manufacture in a factory. Not only can you expect a significant reduction in cost, but it is lightweight, easy to handle, and prestressed by the pretensioning method, so it has a large bending strength and supports a large span synthetic floorboard. It can be formed efficiently without any work.

[Brief description of drawings]

FIG. 1 is a cross-sectional view in the width direction of an embodiment of the present invention.

FIG. 2 is a sectional view of the same in the length direction.

FIG. 3 is a cross-sectional view in the width direction of a synthetic floorboard formed by using the product of the present invention.

[Explanation of symbols]

1: Main body, 2: Truss reinforcement, 3: PC steel material, 4, 5, 6:
Reinforcement, 7: cast-in-place concrete, 8: buried mold.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Izoo Minami Mitsuo Minami 1-13-18 Nakamachi, Koganei-shi, Tokyo No. 211 Koganei Park Court (72) Hiroshi Sakata 4-29-5-402, Maebaru Nishi, Funabashi, Chiba Prefecture issue

Claims (1)

[Scope of utility model registration request] 1. A main body formed of concrete in a flat shape is provided with a plurality of truss bars extending in the length direction thereof, the lower part is embedded in the main body of concrete at appropriate intervals in the width direction of the main body, and the upper part is exposed. A precast concrete board for composite floorboard construction, which is attached and prestressed by a pretensioning method.