JPH01287366A - Construction of reinforced concrete structure - Google Patents

Abstract

PURPOSE:To improve the adhesion between cement mortar and form plates by a method in which form plates having many projections and recessions on their concrete or mortar placing sides are set facing each other and cement concrete or mortar is placed into the placing space for concrete or mortar. CONSTITUTION:Webs 3b of ribbed steel plate are set between the upper and lower flanges 3a of form plates 3 to form many projections and recessions 3d on the concrete or mortar-placing faces of the webs 3b. A bottom plate 6 is set between the lower flanges 3a. The plates 3 are set below a slab 2 to form a concrete placing space 7 by the plates 6 and 3. Cement concrete or mortar 9 is placed with the upper slab 2 portion to construct a reinforced concrete beam 9. The adhesion between the form plates and the cement mortar can thus be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method for constructing a steel concrete structure that can be applied to constructing beams, columns, etc.

(b), Prior Art Conventionally, section steels such as H section steels are installed in parallel, and between the installed section steels, concrete mortar (in this specification,
BACKGROUND ART A method of constructing beams, etc. by pouring "concrete mortar" (meaning "concrete" or "mortar") is known.

In these methods, studs are installed on the side of the section steel where the concrete and mortar will be poured, since it is necessary to maintain adhesion between the concrete and mortar placed inside the section steel. ing.

(C) 8 Problems to be Solved by the Invention However, this method has the disadvantage that a lot of effort is required to install the studs.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, the present invention aims to provide a method for constructing a steel-framed concrete structure that does not require the work of installing studs.

(d) Means for solving the zero problem, that is, the present invention installs formwork plates (3) facing each other, each having a large number of irregularities (3d) formed on the concrete/mortar pouring surface side. to form a concrete placement space (7), and concrete mortar (9) is placed within the concrete placement space (7).

Note that the numbers in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description is not limited to the descriptions on the drawings. The following r (el
The same applies to the column ``, action''.

(e) 0 action, that is, the present invention is such that the unevenness (3d) formed on the formwork plate (3) is different from the concrete mortar and the formwork plate (
3) It acts to remove the adhesion between.

(f), Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a sectional view showing an example of a steel-framed concrete beam to which an embodiment of the method for constructing a steel-framed concrete structure according to the present invention is applied.

Steel concrete beams as steel concrete structures
As shown in FIG. 1, is provided on the lower surface of the upper slab 2, and the steel concrete beam 1 has a steel formwork plate 3.3. The formwork plates 3.3 are provided to face each other and extend in a direction perpendicular to the plane of the paper, and the formwork plates 3 have flange portions 3a provided above and below.

3a. A web portion 3b made of a ribbed steel plate or the like is provided between the flange portions 3a13a to connect the two, and a large number of irregularities 3d are formed on the surface of the web portion 3b on the side where concrete/mortar is to be poured. There is.

On the upper surface of the flange portion 3a in the upper part of the figure, a large number of studs 3C for connecting the formwork plate 3 and the slab 2 are planted at predetermined intervals in the direction perpendicular to the plane of the paper, and the formwork plate 3.3 A bottom plate 6 is provided between the lower flange portions 3a, 3a so as to close the gap 5 created between the two. Further, concrete mortar 9 is placed in a concrete placement space 7 formed between the formwork plate 3.3, the bed plate 6, and the lower surface of the slab 2.

Since the steel-framed concrete beam 1 has the above-mentioned configuration, when constructing the beam, first the formwork plate 3 is assembled with the flanges 3a, 3a and the unevenness 3 constituting the formwork plate 3.
The web portion 3b formed in d is welded and connected. Since the steel plate constituting the web portion 3b having the unevenness 3d is commercially available as a rib steel plate or the like, the formwork plate 3 can be easily manufactured. After forming the form plate 3 in this way, as shown in 1rEi, the form plate 3.3 is placed below the slab 2 so as to face each other. At this point, the slab 2 is covered with concrete and mortar. (The concrete and mortar for the slab 2 portion is placed at the same time as the pouring for the beam 1), and a paving plate 6 is installed between the formwork plates 3.3. Then, the floor plate 6
Since a concrete casting space 7 is formed by the formwork plate 3.3, concrete mortar 9 is poured into the concrete casting space 7 together with the upper slab 2 portion, and the steel-framed concrete beam 1 is constructed. complete it. In this way, the adhesion between the poured and solidified concrete mortar 9 and the formwork plate 3 is maintained at the web portion 3b of the formwork plate 3.
Due to the unevenness 3d formed on the surface, it is generated in a good condition.

Note that the above-mentioned embodiments describe the present invention as a steel-framed concrete beam 1.
Although the present invention is not limited to the steel-framed concrete beam 1, it can also be applied to forming a concrete casting space using a formwork plate, and pouring concrete and mortar into the concrete casting space. It goes without saying that it can be applied to various types of reinforced concrete structures such as columns.

(g) 0 Effects of the Invention As explained above, according to the present invention, concrete is poured by installing formwork plates 3 facing each other, each having a large number of unevenness 3d formed on the concrete/mortar pouring surface side. Since the space 7 is formed and the concrete/mortar 9 is placed in the concrete placing space 7, the adhesion between the formwork plate 3 and the concrete/mortar is achieved through the unevenness 3d. This makes it possible to eliminate the trouble of installing studs, etc.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of a steel-framed concrete beam to which an embodiment of the method for constructing a steel-framed concrete structure according to the present invention is applied. 1... Steel concrete structure (steel concrete beam) 3... Formwork plate 3d... Unevenness 7... Concrete pouring space

Claims (1)

[Scope of Claims] A concrete casting space is formed by installing formwork plates having a large number of unevenness formed on the concrete/mortar casting surface so as to face each other, and concrete/mortar is placed within the concrete casting space. A method of constructing a steel concrete structure constructed by pouring.