JPH01174735A - Construction of framework member in precast rc framework structure - Google Patents

Abstract

PURPOSE:To improve the efficiency of construction by dividing a shaft member such as pillars and beams to a pair of PC members having a prescribed thickness and embedding the both members, keeping a prescribed interval, and applying the arrangement of reinforcement and integrally forming the both members by pouring concrete. CONSTITUTION:A pair of opposed pillar members having a part of a reinforced stem 2 projecting from the opposed surface of a precast concrete pillar member A having a prescribed thickness (t) are formed. The both members A and A are embedded, keeping a prescribed interval, and the projecting reinforced stems 2 are joined, and after the necessary arrangement of reinforcement is applied into the gap, concrete 3 is poured, and the both members A and A are formed integrally. Therefore, the weight of one piece of the PC member can be reduced drastically, and transportation and execution can be facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of constructing a frame member in a precast RC frame structure.

(Prior Art) Due to the deterioration of construction labor conditions in recent years, labor saving on site has become an issue, and one solution to this problem is the PC method of precasting reinforced concrete members such as columns, beams, floors, etc.

(Problems to be solved by the invention) Since the current PC construction method generally has a large weight per piece,
Adoption requires special heavy equipment, which is often uneconomical.

Furthermore, in the case of long-span beams and columns with high floor heights, the weight of one piece becomes too large, which exceeds the lifting capacity of the PC manufacturing factory, and the PC construction method may not be adopted due to transportation issues.

As described above, there are many cases where the weight of one piece of PC member determines the cost and whether or not the construction method can be adopted.

(Means for Solving the Problems) The present invention has been proposed to solve the above problems, and has a structure in which the frame members have a required thickness and some of the reinforcing bars are Consisting of some opposing precast concrete member pieces protruding from opposing surfaces, both of the precast concrete member pieces are erected at a predetermined position with a predetermined gap, and the A precast RC shaft characterized by joining reinforcing bars and arranging required reinforcement in the gap, then pouring concrete in the gap, and integrating the poured concrete with each of the component pieces. This relates to a construction method for frame members in a assembled structure.

(Function) According to the present invention, as described above, the frame material in a precast RC frame structure is divided into some opposing precast concrete member pieces each having a predetermined thickness, and A part of the buried reinforcing bars is made to protrude from the opposing surfaces of the two member pieces, and the two member pieces configured in this manner are carried to the site and placed at a predetermined position with a predetermined gap between them. , by joining the reinforcing bars protruding from the opposing surfaces of the two component pieces, placing the required reinforcement in the gap between the two component pieces, and then pouring concrete into the gap. Both of the above-mentioned pieces are integrated through concrete to form a frame material for a precast RC frame structure.

(Example) The present invention will be described below with reference to the illustrated embodiments.

Figures 1 and 2 show an example in which the present invention is applied to a PC column in a precast RC frame structure. Both ends of the hoop reinforcement (2) that covers the column main reinforcement (1) embedded in the member piece (^) protrude from the opposing surface of each of the column member pieces (A).

Furthermore, the facing surface of the component piece (A) of each company is formed into a rough surface.

Some of the precast concrete column member pieces (^) (A) constructed as described above were delivered to the site and placed opposite each other with a gap so that the predetermined column dimensions hl were achieved as shown in Figure 2. , weld the hoop strip (2) that protrudes from the opposing surface (b)
At the same time, the main column reinforcement (1') is arranged in the gap, and then concrete (3) is placed in the same gap, and the two column member pieces (^) (A) are integrated to form the column material. Build.

FIG. 3 and FIG. 4 show other embodiments of the present invention, and the above-mentioned -
A cotter (4) is installed on the opposing faces of the twin precast concrete column pieces (^), and is intended to integrate with the cast concrete (3) in the gap between the two precast concrete column pieces (A).

In the figure, parts equivalent to those of the above embodiment are given the same reference numerals.

Note that the hoop muscle (2) is made to protrude from the column member piece (A).
can take various shapes, as shown in Figures 5 to 8.
The figure shows each embodiment.

Further, the hoop reinforcements (2) protruding from the opposing surfaces of the opposing column member pieces (A) are joined by mechanical joints, lap joints, etc., in addition to welding as in the above embodiments.

Fig. 9 and Fig. 1O show an example in which the present invention is applied to a PC beam in a precast RC frame structure, and (B) shows a part of a precast concrete beam having the required thicknesses i, l, i, l. A stirrup reinforcement (6) that covers the beam lower end main reinforcement (5) embedded in the beam member piece (B) is made to protrude from the opposing surface and the upper surface of the beam member piece (B), and Place a cotter (7) on the surface (8 in Figure 0)
) are reinforcement bars.

The above-mentioned twin precast concrete beam pieces (
B) is delivered to the site and placed at a predetermined position with a gap of a predetermined length so as to have a predetermined beam width C, as shown in FIG. The stirrups (6) protruding from the opposing surfaces of the pieces (B) are joined by welding or other appropriate directions, and the beam lower end main reinforcements (5') are arranged in the gap, and the beam upper end main reinforcements (5') are arranged in the gap. 9) Arrange stirrup width stop reinforcements OI on the upper part of both beam member pieces (B), pour concrete) 00 in the gap and upper part of the beam member pieces (B), and This is to integrate the beam member pieces (B).

Note that the stirrup (
6) can take various shapes, so the
Figure 3 shows each embodiment.

In addition to providing the opposing surface of each of the beam member pieces (B) with a bumpter (7) as in the example, it is also formed into a rough surface or by taking appropriate measures to integrate it with the poured concrete. It is.

(Effects of the Invention) As described above, in the present invention, the frame members in the RC frame structure are arranged in opposite sides having a required thickness and with a part of the reinforcing bars protruding from the opposing surface. P by being constructed from precast concrete pieces
The weight of one piece of the C member is significantly reduced compared to the weight of one piece of the conventional one-piece PC member, making transportation and construction easier, and the two pieces of the member are placed in a predetermined position with a predetermined gap between them. , joining reinforcing bars protruding from the opposing surfaces in the gap, placing concrete after arranging the required reinforcement in the gap, and integrating the two component pieces through the poured concrete. As a result, a frame member having structural strength and rigidity equal to or higher than that of conventional integrally cast 20 members is constructed.

In addition, if there is no need to reduce the weight of the frame material unnecessarily, the weight can be adjusted to suit the conditions by adjusting the thickness of the precast member pieces. It is rich in sexuality.

[Brief explanation of the drawing]

Figures 1 and 2 are cross-sectional plan views showing an example of applying the method of the present invention to the construction of columns. Figure 1 shows the state before the pillar is completed, and Figure 2 shows the state when the pillar is completed. 3 and 4 are cross-sectional plan views showing other embodiments of the present invention, and FIGS.
The figure shows the state before the pillar is completed, and Figure 4 shows the state when the pillar is completed. 5 to 8 are cross-sectional plan views showing respective examples of precast concrete beam member pieces, and FIGS. 9 and 10 respectively.
The figures are longitudinal cross-sectional views showing an example of applying the method of the present invention to the construction of beams. FIG. 9 shows the state before the beam is completed, and FIG. 11 to 13 are cross-sectional plan views showing respective embodiments of precast concrete beam member pieces. (A) - Precast concrete column member piece (B)
- Precast concrete beam member piece (1) (1'
) - Column main reinforcement, (2)・- stirrup, (3) −・−
Concrete, (5) (5')...beam lower end main reinforcement,
(6) - Stirrup, (11) - Concrete agent Patent attorney Shige Okamoto 2 people outside of the text Figure 11, Figure 12, Rough Figure 13

Claims (1)

[Claims] The frame material has a required thickness and is composed of opposing precast concrete member pieces with part of the reinforcing bars protruding from the opposing surface, and the two member pieces are separated with a predetermined gap between them. The reinforcing bars protruding from the opposing faces of the two parts are joined together, and the required reinforcement is placed in the gap. Then, concrete is placed in the gap and concrete is placed in the same place. A method for constructing frame materials in a precast RC frame structure, characterized by integrating construction concrete with each of the above-mentioned member pieces.