JPH07569Y2 - Void slab - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a void slab.

[Problems to be solved by the invention]

As the void slab method, a method of forming a hollow portion in the slab by using a form such as a cylindrical corrugated board is widely adopted.

The void slab formed by such a construction method is to be constructed at the site along with the walls and beams of the building,
It is not possible to connect in the field depending on the floor span. Therefore, the construction is complicated and the flexibility of construction is low.

The present invention has been made to solve the above problems, and an object thereof is to provide a void slab that can be easily connected according to the floor span on site and has a high degree of freedom in construction. .

[Means for solving problems]

In the void slab according to the present invention, web steel frames continuous in the void direction are connected by bolts and nuts by abutting a connecting plate so as to be hung between the end portions, and the lower slab is a reinforcing rod in the void direction protruding from the concrete portion. Concrete is placed by overlapping and connecting concrete.

[Embodiment] The present invention will be described in detail below based on an embodiment shown in the drawings.

In the figure, reference numeral 1 is a web steel frame, and in this embodiment, type I steel is used. Two web steel frames 1 are arranged in parallel. A plurality of L-shaped angles 2 are attached to the lower surface of the web steel frames 1 and 1 at appropriate intervals in the longitudinal direction, so that the covering of the concrete portion of the lower slab described later can be secured. Reinforcing steel 3 on the left and right web steel frames 1 and 1
Is attached and both are connected.

As shown in FIG. 3, reinforcing bars 4 for embedding in the lower slab are attached to the lower portions of the web steel frames 1, 1 at appropriate intervals in the longitudinal direction. The reinforcing bars 4 penetrate the web steel frame 1 and project left and right in a chevron shape, and are welded to the reinforcing bars 5 in the lower slab. Reinforcing bars 5 in the lower slab are arranged horizontally and vertically below the web steel frames 1 and 1. Concrete 6 is cast so as to bury the lower portions of the web steel frames 1, 1, the reinforcing bars 4, and the reinforcing bars 5, and the lower slab 7 is formed.

As described above, the web steel frames 1 and 1 and the lower slab 7 that are integrated are brought into the site and a plurality of them are connected according to the span of the floor. In order to connect, the end portions of the lower slabs 7 that are adjacent to each other have a recess 8 formed in the upper surface, and the reinforcing bars 5 are exposed. The reinforcing bar 5 extends from the end of the other lower slab 7 in the void direction. The reinforcing bars 5, 5 of both lower slabs 7, 7 are made to overlap in the recess 8.

Adjacent web steel frames 1 and 1 are brought into contact with each other at their end portions, and the connection plates 9 and 9 are brought into contact with each other from the front and back so as to be bridged over both surfaces. The connection plates 9 and 9 and the web steel frames 1 and 1 are fixed by bolts and nuts 12, and the web steel frames 1 and 1 are connected.

The mortar or concrete in the recess 8 of the lower slab 7 described above is cast to embed the reinforcing bar 5.

The ones connected as described above are hooked at the end portions of the web steel frames 1 and 1 and bridged between the girders 13, 13.

A reinforcing member 16 is welded to the end of the web steel frame 1 and fixed by an L-shaped member 17 on the girder 13 and bolts and nuts. By this, the construction of the void slab is easily completed.

As shown in FIGS. 7 and 8, the lower slabs 7 and 7 of the void slabs that are juxtaposed adjacent to each other have recesses 10 and 10 formed on the upper surfaces of both ends in the width direction, and the reinforcing bars 5 and 5 project upward. A ladder-shaped connecting bar 11 is hung on the reinforcing bars 5 and 5, and the recesses 10 and 10
Mortar and the like are placed.

Place the keystone plate 14 on the web steel frame 1, 1,
Concrete 6 is cast on the keystone plate 14 to form an upper slab 15.

[Effect of device]

The present invention has the configuration as described above, and can obtain the following effects.

I. Since the web portion of the void slab is made of steel, it is possible to reduce the weight of the floor, and it is easy to increase the floor span and increase the height. In addition, it is possible to manufacture the integrated web steel frame and lower slab at the factory and carry it to the site because of its light weight.Because the work can be connected at the site according to the floor span, the flexibility of construction is great. Become.

B. Since it is possible to easily connect the web frames of the void slab unit to each other and the lower slabs, it is possible to connect the void slab units that were divided at the factory and manufactured at the site, and it is easier to carry in the void slab unit. Becomes

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a void slab according to the present invention, and FIG.
The figure is a perspective view before hanging on the girder, FIG. 3 is a partial sectional view of the lower slab, FIG. 4 is a vertical sectional view of the connecting portion, FIG. 5 is its plan view, and FIG. 6 is a longitudinal section in an overlapped state. FIG. 7 is a perspective view showing a connection between adjacent void slabs, FIG. 8 is a partial cross-sectional view thereof, and FIG. 9 is a longitudinal cross-sectional view of an end portion of the void slabs.
FIG. 10 is a sectional view taken along the line AA of FIG. 1 ... Web steel frame, 2 ... L-shaped angle, 3 ... Reinforced steel material, 4
... Reinforcing bar, 5 ... Reinforcing bar, 6 ... Concrete, 7 ... Lower slab, 8 ... Recessed part, 9 ... Connection plate, 10 ... Recessed part, 11 ... Reinforcing bar, 12
… Bolts and nuts, 13… Large beams, 14… Keystone plates, 15… Upper slabs, 16… Reinforcement materials, 17… L-shaped materials.

Claims (1)

[Scope of utility model registration request] 1. In a void slab in which a concrete steel upper slab and a lower slab are supported by a web steel frame, a web steel frame continuous in the void direction is abutted against a connecting plate so as to be bridged between the end portions by bolts and nuts. The void slab is characterized in that the lower slab is connected to the lower slab by placing concrete by overlapping the reinforcing rods in the void direction protruding from the concrete portion.