JP2007107187A - Floor concrete structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor concrete structure capable of further improving the transmission of force in the shearing direction by enlarging the contact area of both concretes by improving meshing of the mutual adjacent concretes in a successively jointing part of a floor concrete. <P>SOLUTION: A metal lath bent in a bellows shape is arranged in the successively jointing part of the floor concrete, and in the metal lath, a material in the vertical direction and a material in the horizontal direction in the bending direction, are alternately continuously arranged in the horizontal direction at a predetermined interval. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a floor concrete structure.

  For example, when placing large-scale floor concrete, if a large amount of concrete is placed at once, the concrete itself becomes high temperature, and cracking due to shrinkage is likely to occur. Therefore, the placement section is set in advance and the placement is performed sequentially. Conventionally, there is a concrete joint in which a metal net-like metal lath is provided (see, for example, Patent Document 1).

This is because the expanded body is placed at the joint of adjacent section concrete, and the expanded body has very low rigidity, so it absorbs it against the extension and compression force and In the case of being buried, instead of disappearing its absorption capacity, it is intended to maintain the function as a seismic wall by using a reinforcing material that exhibits the same rigidity and strength as a reinforcing bar.
JP-A-53-49824

  In the invention described in Japanese Patent Laid-Open No. 53-49824, an expanded body is provided at the joint portion, but the function is to prevent the occurrence of cracks while maintaining the function as a seismic wall. Engagement between the concrete in the compartment and transmission of shear force in the floor concrete are not fully considered.

  An object of the present invention is to provide a floor concrete structure capable of improving the meshing at the joint portion of the floor concrete and improving the transmission of the shearing force, in order to eliminate the disadvantages of the conventional example.

  In order to achieve the above-mentioned object, the present invention is summarized in that the metal lath is bent in a bellows shape and disposed in the joint portion of the floor concrete.

  According to the first aspect of the present invention, since the bent metal lath is disposed in the joint portion, the joint surface between the concrete in adjacent sections becomes a wedge shape, and the meshing is improved. In addition, the contact area of the joint is increased, and the shear force transmission of the concrete is improved. In particular, the metal lath is bent in a bellows shape, and the contact area between the metal lath and the concrete is larger than when the metal lath is formed in a flat plate shape, and the transmission of force in the shearing direction of both concrete is improved.

  The gist of the invention according to claim 2 is that the metal laths are alternately arranged in the horizontal direction at predetermined intervals in the vertical direction and in the horizontal direction.

  According to the second aspect of the present invention, since the different bending directions are alternately arranged, the meshing is further improved.

  As described above, in the floor concrete structure of the present invention, the metal lath disposed in the joint portion is bent in a bellows shape, so that the meshing at the joint portion of the floor concrete can be improved and the transmission of the shearing force can be improved. It is.

  Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 is a perspective view of a metal lath which is a main part showing an embodiment of a floor concrete structure according to the present invention. In the figure, 1 shows a metal lath disposed at a joint portion of floor concrete.

  According to the present invention, the metal lath 1 is bent in a bellows shape, and the metal lath 1a bent in the vertical direction and the metal lath 1b bent in the horizontal direction are formed separately, and the metal laths 1a and 1b are alternately continuous in the horizontal direction. Each metal lath 1a, 1b is attached to the reinforcing bar frame 2 arranged vertically and horizontally.

  As for the size, in the illustrated example, the metal lath 1a bent in the vertical direction was formed with a horizontal width of 600 mm, and the metal lath 1b bent in the horizontal direction was formed with a horizontal width of 900 mm.

  A method of joining the floor concrete 3 using the metal laths 1a and 1b will be described with reference to FIGS. A metal lath 1 shown in FIG. 1 is arranged at the position of the joint portion of the concrete 4 to be placed in advance. In the figure, 6 is a moisture-proof film to be laid at the bottom of the placement site, 7 is a bar spacer with a lath, 8 is a concrete retaining mold, 9 is a pier, and 10 is a wire bundle.

  Then, as shown in FIG. 2, the concrete 4 is placed in a section surrounded by the moisture-proof film 6, the concrete retaining mold 8, and the metal laths 1a and 1b. As shown in Fig. 3, the concrete frame 8 and the rebar frame 2 attached to the metal laths 1a and 1b are removed, and the subsequent concrete 5 is placed.

  In this state, the metal laths 1a and 1b are embedded in the joints between the concrete 4 and the concrete 5, but the metal laths 1a and 1b are formed in a bellows shape, so that the mountain portions are made of concrete 4 and 5, respectively. It enters the wedge shape in the direction, and the concrete 4 and 5 mesh firmly.

  Moreover, compared with the case where the metal laths 1a and 1b are formed in a flat plate shape, the contact area between the metal laths 1a and 1b and the concrete 4 and 5 is increased, and the transmission of force in the shear direction of both the concrete 4 and 5 is improved. Become. Thereby, it is possible to prevent an accident such as a step on the floor when receiving a bending load or the like.

  Moreover, since the bending directions of the metal laths 1a and 1b are alternately different from each other in the vertical and horizontal directions, it is possible to cope with forces acting in different directions. As a result, floor concrete with increased strength can be obtained.

It is a perspective view of the metal lath which is the principal part which shows embodiment of the floor concrete structure of this invention. It is a vertical side view of the state which laid concrete which precedes the embodiment of the floor concrete structure of the present invention. It is a vertical side view of the embodiment of the floor concrete structure of the present invention.

Explanation of symbols

1, 1a, 1b Metal lath 2 Reinforcement frame 3 Floor concrete 4, 5 Concrete 6 Moisture-proof film 7 Bar spacer with lath 8 Concrete retaining form 9 Crossing 10 Wire bundle

Claims (2)

  A floor concrete structure characterized in that a metal lath is bent into a bellows shape and disposed at a joint portion of the floor concrete.   2. The floor concrete structure according to claim 1, wherein the metal laths are alternately arranged in a horizontal direction at a predetermined interval between a vertical direction and a horizontal direction.

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