JPH0443129B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a method for constructing a reinforced concrete structure using a plurality of precast reinforced concrete columns having holes for inserting beam reinforcing bars.

(Prior Art) As one method for constructing a precast reinforced concrete structure, a column having beam reinforcement is made of precast reinforced concrete, the column is installed at a predetermined position at a work site, and then the beam installed in advance on the column is There is a construction method in which the reinforcing bars are connected to the beam reinforcing bars of a predetermined length on the adjacent columns, and then concrete is poured into the beams between the columns. However, in this construction method, since the beam reinforcing bars are pre-installed on the precast reinforced concrete, the beam reinforcing bars get in the way when transporting the columns, making it difficult to transport the columns, and the joints of the beam reinforcing bars at the construction site are difficult to handle. There are many parts, which complicates assembly work.

As another method for constructing precast reinforced concrete structures, for example,
As described in the publication, a column having a plurality of holes penetrating in the horizontal direction and a beam having holes aligned with the holes of the column are made of precast reinforced concrete, and the columns and beams are made of precast reinforced concrete at the work site. There is a method of aligning each hole, inserting a tensioning steel material into each aligned hole, and then tightening and fixing the ends of the tensioning material to the beam, thereby joining and fixing the column and beam to each other by tension fixing. . However, with this construction method, it is difficult to align each hole in the columns and beams, and the beams must be kept suspended until the columns and beams are joined, making it difficult to assemble the beams. Poor workability.

(Object of the invention) The present invention is easy to transport and assemble;
The purpose of this invention is to provide a method for constructing a reinforced concrete structure using precast reinforced concrete columns with good workability.

(Structure of the Invention) The present invention is a method for constructing a reinforced concrete structure using a plurality of precast reinforced concrete columns having horizontally penetrating holes for inserting beam reinforcing bars, and in which beam reinforcing bars are inserted into the holes of each column at a work site. are inserted, then the ends of the beam reinforcing bars are joined to each other, and then concrete is poured into the beam portion between the columns to form a beam.

(Operations and Effects of the Invention) According to the present invention, the beam reinforcing bars may be inserted into the holes of the columns at the construction site, and there is no need to provide the beam reinforcing bars in the precast reinforced concrete columns in advance. For this reason,
According to the present invention, the beam reinforcing bars do not get in the way of transportation work and assembly work, making the transport work and assembly work easier, and the workability of these works is improved.

Furthermore, in the present invention, it is only necessary to insert the beam reinforcing bars into the holes of the columns and then connect the beam reinforcing bars to each other, and after the columns are installed in a predetermined position, the columns and the beam reinforcing bars are suspended. There's no need. Therefore, according to the present invention, the assembly work becomes easier and the workability is further improved.

The beam reinforcing bars may be inserted into each hole either after or before the columns are installed in position. The joint position of each beam reinforcing bar is preferably at the center of the beam where the shear force applied to the joint is the smallest. Each beam reinforcing bar is fixed to the column by inserting a part of the concrete poured into the beam into the hole, but by putting grout material into the hole and fixing it to the column by the graft material. It is preferable to let

(Example) Hereinafter, an example of the present invention shown in the drawings will be described.

In addition, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 7
In the figures and FIG. 8, in order to show the arrangement of each reinforcing bar and sheath pipe, each reinforcing bar and sheath pipe that are actually buried in concrete and do not appear are also shown by solid lines.

A precast reinforced concrete column 10 used in the present invention, shown in FIGS. 1 to 3, includes a plurality of vertical reinforcing bars 12 extending in the vertical direction, a plurality of connecting reinforcing bars 14 that interconnect the longitudinal reinforcing bars 12, and a column and a beam. In the illustrated example, a plurality of sheath pipes 16 are disposed in the joint portion of the column, that is, at the upper end of the column, and are provided in the concrete 18. The vertical reinforcing bars 12 protrude upward from the columns 10.

The sheath pipes 16 are arranged to intersect in a grid pattern at intervals in the vertical and horizontal directions, and have a plurality of irregularities on the outer and inner surfaces, and are firmly fixed to the concrete 18 due to the irregularities on the outer surface. has been done. Further, the length dimension of the sheath tube 16 is the same as the thickness dimension of the column 10 in the longitudinal direction of the sheath tube 16, so that each sheath tube 16 defines a hole 20 extending in the horizontal direction for inserting the beam reinforcement. . Holes 20 may be formed directly in concrete 18.

Note that the pillar 10 shown in FIG. 1 has a height of one floor of a structure, but as shown in FIG. The pillar 10' may have a dimension of 10.
In the case of this column 10', the sheath pipes 16 are arranged at the joints between each beam and the column in the first floor portion and the second floor portion.

A method for constructing a reinforced concrete structure using a plurality of columns 10 having such a structure is to first fill the holes 20 of each column 10 for one floor at the construction site as shown in FIGS. 4 to 6.
As shown in the figure, after inserting the main beam reinforcing bars 22, the columns 10 are installed at predetermined positions. In addition,
The beam reinforcing bars 22 may be inserted into the holes 20 after the pillars 10 are installed at predetermined positions.
If the pillar 10 is installed at a predetermined location after inserting the pillar 2, the work efficiency will be improved.

Next, as shown in FIG. 6, the end of each beam reinforcing bar is joined to the end of the beam reinforcing bar 22 inserted through the hole 20 of the adjacent column 10 by a joining means such as welding or screw joint. As shown in FIGS. 7 and 8, grouting material 24 is injected into each hole 20, and the beam reinforcing bars 22 are fixed to the columns 10, and as shown in FIGS. Shear reinforcing bars 26 are placed. Either injection of the graft material 24 or placement of the shear reinforcing bars 26 may be performed first.

After that, a formwork is placed in the beam part between the columns 10, concrete 18 is placed in the space defined by the formwork, and the concrete is solidified to form the beam 30 or the beam 30 and the floor. Build a one-story structure.

By performing the above steps for each floor, a concrete structure 32 as shown in FIG. 9 can be constructed. Each column 10 of the structure 32 is designated by the reference numeral 3
It is mutually joined to vertically adjacent columns at the position indicated by 4. Note that the pillar 10' shown in FIG.
When using, as shown in FIG. 11, a two-story structure may be constructed at one time by inserting beam reinforcing bars 22 into the sheath pipe 16 at each joint between a column and a beam.

[Brief explanation of the drawing]

Fig. 1 is a front view showing one embodiment of the pillar used in the present invention, Fig. 2 is a vertical cross-sectional view showing a part of the pillar in Fig. 1 enlarged, and Fig. 3 is 3-3 in Fig. 2. Figure 4 is a cross-sectional view taken along the line, Figure 4 is a vertical cross-sectional view at the same position as Figure 2, showing the beam reinforcing bars inserted into the column, and Figure 5 is the same position as Figure 4.
Figure 6 is a cross-sectional view taken along line 5-5 in the figure, Figure 6 is a front view showing the state in which the beam reinforcing bars are joined together, and Figure 7 is a front view showing the state in which the beam reinforcing bars are connected together. A vertical cross-sectional view taken at the same position as Fig. 2 showing the established state, Fig. 8 is a cross-sectional view taken along line 8-8 in Fig. 7, and Fig. 9 is a cross-sectional view showing a part of the constructed structure. Figure 10 is a front view showing another embodiment of the pillar,
FIG. 11 is an explanatory diagram of a construction method when using the pillars shown in FIG. 10. 10, 10': Column, 20: Hole for inserting beam reinforcement,
22: Beam reinforcing bar, 24: Grout material, 30: Beam.

Claims (1)

[Scope of Claims] 1. A method for constructing a reinforced concrete structure using a plurality of precast reinforced concrete columns having horizontally penetrating holes for inserting beam reinforcing bars, the method comprising inserting beam reinforcing bars into the holes of each of the columns at a work site. and then joining the ends of the beam reinforcing bars to each other, and then pouring concrete into the beam portion between the columns to form a beam. 2. The reinforced concrete construction method according to claim 1, wherein the beam reinforcing bars are mutually joined at the center of the beam portion. 3. The method for constructing a reinforced concrete structure according to claim 1, wherein the pillar is installed at a predetermined position after the beam reinforcing steel is inserted into the pillar.