JPS6237465A - Method for casting concrete - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a method for placing concrete in a building composed of columns, beams and floors, and particularly relates to a method for placing concrete suitable for application to high-rise buildings. Concerning the method of placing.

(b), Prior Art FIGS. 2 and 3 are diagrams showing a conventional method of placing concrete.

Traditionally, concrete pouring for this type of building was done by
As shown in Fig. 2, the column 1, the upper floor 2 and the 3 parts of the beam are poured at once, or as shown in Fig. 3, the first part of the column is first poured and then The concrete is poured up to the lower surface 1b of the beam of the layer 1, and then the concrete is poured from the lower surface 1b of the beam to the joint surface 1 of the column 1 of the upper layer.
A method is used in which parts up to a are poured together with the floor 2 and beam 3 parts.

(C) 0 Problems to be solved by the invention However, when building a high-rise building using reinforced concrete, the concrete that makes up the columns has a high (super) compressive strength.
It is necessary to use high strength concrete. However,
In the concrete placing method described above, column 1 is poured at the same time as floor 2 and beam 3 (in the case shown in Fig. 2, column 1, beam 3, and floor 2 are poured at the same time, In the case shown in Figure 3, the panel zone that intersects beam 3 of column 1, beam 3, and floor 2 are poured at the same time.) High-strength concrete is poured only in column 1, where strength is actually required. Therefore, it would be unreasonable to place high-strength concrete in the floor 2 and beam 3 parts, which do not require much strength.

This means that parts that do not require rigidity should be made of lightweight concrete.
In high-rise buildings where it is necessary to reduce the weight of the building, the degree of freedom in design will be lost.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, the present invention aims to provide an IH concrete pouring method that can distinguish between the types of concrete to be poured in column parts and floor and beam parts. It is something.

(d) Means for solving the zero problem, that is, the present invention is to cast the column (1) up to the pouring surface (1a) of the upper layer column (1'), and then (
The upper floor (2) and beam (3) connected to 1) are cast at the same time.

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 in the drawings. r' (e) below
The same applies to the ``0 effect'' column.

(e) 0 effect With the above-described configuration, the concrete of the present invention (first, column 0) is poured up to the pouring surface (1a) of the upper layer column (1), and then the floor (2) and the beam By placing concrete for (3), the column (1) acts so that concrete can be placed completely separately from the concrete for the floor (2) and beam (3).

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

FIG. 1 is a diagram showing a column and beam portion of a building showing an embodiment of the concrete placing method according to the present invention.

That is, as shown in FIG. 1, when constructing a high-rise building, when constructing a column 1, an upper beam 3, and a floor 2 on a lower floor 2', the column 1 is first placed on the upper floor 2'. The concrete is poured up to the pouring surface 1a with the column 1'. At this time, the concrete used for pouring the pillar 1 is Z3a strong IJF or ultra-high strength concrete. Next, the upper beam 3 and floor 2 are cast in such a manner that they connect with the panel zone of the column 1 that has already been cast. At this time, the concrete used for pouring the beam 3 and floor 2 is normal strength concrete because the beam 3 and floor 2 portion do not require as much strength as the column 1 portion.

In this way, once the concrete for the beam 3 and floor 2 portions has been poured, next, on the pouring surface 1a of the column 1 that is not exposed on the floor 2, the upper layer column 1' is poured, and the next column is poured. Concrete is poured up to the joint surface 1a, and then concrete is poured in the same manner.

(g) 0 Effects of the Invention As explained above, according to the present invention, the column 1 is cast up to the pouring surface 1a of the upper layer column 1', and then connected to the cast column 1. Since the upper floor 2 and beam 3 are constructed so as to be cast at the same time, the column 1 part that requires strength can be cast separately from the beam 3 and floor 2, and the concrete to be cast separately can be It becomes possible to distinguish between types. Furthermore, since lightweight concrete can be used for parts that do not require rigidity, the degree of freedom in design can be increased.

Furthermore, by pouring high-strength concrete for the 1st column and ordinary concrete for the 2nd floor and 3rd beams, which do not require as much strength, it is possible to construct a building that is suitable for the forces acting on it. becomes.

[Brief explanation of drawings]

Fig. 1 is a diagram showing pillars and beams of a building showing an embodiment of the concrete placing method according to the present invention, Fig. 2 and Fig. 3 are
The figure shows a conventional concrete placing method. 1. Column la Pour joint surface 2. Floor 3. Beam 5 Building applicant Mitsui Construction Co., Ltd. Agent Patent attorney Phase 1) Extension Figure 1 5 speed prayer ~ 1'. Figure 2 Figure 3

Claims (2)

[Claims] (1) When pouring concrete for a building consisting of columns, beams, and floors, the columns are poured up to the pouring surface of the upper-layer columns, and then the upper-layer floor is connected to the poured columns. A method of placing concrete in which beams and beams are placed at the same time. (2) The method for placing concrete according to claim 1, wherein the concrete placed in the column portion is constructed using concrete having a higher strength than the concrete placed in the floor and beam portions.