JPH03287979A - Execution method of concrete construction - Google Patents

Abstract

PURPOSE:To facilitate insulating and curing by erecting steel framed columns making the first framework as two or more layers, erecting successively a semi-PC external wallboard, PC beam and PC floor board after placing one layer portion of column reinforcement, and heating and curing a shielded space. CONSTITUTION:Previously assembled column reinforcing steels for the first layer are placed to steel framed columns 1, and they are connected to column reinforcing steels for the lower floor to arrange a semi-PC external wallboard 3, PC beam 4 and semi-PC floor board 5 for the first layer. After that, column reinforcing steels 2 for the second floor are placed to connect them to the column reinforcing steels for the first layer, and a semi-PC external wallboard 3, PC beam 4 and semi-PC floor board 5 are arranged to place a skeleton concrete 6 for the first layer. Then, the inside of a shielded space partitioned by the skeleton concrete 6 and semi-PC member is heated and cured by a burner, etc. According to the constitution, insulating and curing of concrete can be easily performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of constructing a concrete structure, particularly a method of constructing a concrete structure that can be used in cold regions and during winter.

(Prior Art) Construction of reinforced concrete or steel-framed reinforced concrete buildings in cold regions is suspended due to problems such as snowfall, low temperatures, and labor during the winter.

Alternatively, it may take a lot of effort to construct a temporary curing space.

(Problems to be Solved by the Invention) In any case, the current situation is that construction in cold regions inevitably requires a longer construction period than in general land.

The present invention was proposed in view of these circumstances, and its purpose is to construct concrete structures that can be constructed in winter, reduce labor, and shorten the construction period. The point is to propose a law.

(Means for Solving the Problems) In order to achieve the above object, according to the method of constructing a concrete structure according to the present invention, a steel column with two or more layers at the first joint is erected, and the column for one layer is erected. After placing the reinforcing bars, one layer of half-PC exterior wall boards, PC beams, and one layer of half-PC floorboards are erected in sequence, and then the second layer of column reinforcement, half-PC exterior wall boards, PC beams, and half-PC floorboards are installed in the first layer. After construction was completed in the same manner as in the previous section, the first layer of concrete for the frame was poured after floor and wall reinforcement was placed for the I layer, and the shielded space defined by the concrete for the frame and the semi-PC members for the second layer was heated. After curing, the above steps are repeated for the second and subsequent layers.

(Function) According to the present invention, as described above, ■ a steel column with two or more layers of joints is erected, one layer of column reinforcement is provided, semi-PC exterior wall boards, PC beams, etc. Erect half-PC floor boards, then install the second layer of column reinforcing bars and connect them to the first-layer column reinforcing bars, and connect the second-layer half-PC exterior wall boards, PC beams, and half-PC floor boards to the first layer. Construction was carried out in the same manner, and then the first layer of floor and wall reinforcement was placed, and the first layer of concrete was poured, and the shielded space was defined on the first layer using the same concrete and the second layer of semi-PC members. , the shielded space will be heated and cured to prevent negative effects on the concrete due to a drop in temperature.

For the second and subsequent layers, the same process as above is repeated, thus making it possible to construct a concrete structure even in cold winter regions.

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

As shown in Figure 1, in the case of reinforced concrete construction, temporary column steel frames are placed within the erection columns, and in the case of steel reinforced concrete construction, permanent column steel frames (1) are erected in at least two layers.

In addition, the temporary steel columns (1) are arranged so that the strong axes of the adjacent columns are offset by 90 degrees as shown in Figure 10, so that the earthquake force, wind force, etc. It is better to be able to resist the horizontal force of

Next, the first layer of column reinforcing bars (
2), connect it to the column reinforcing bar (2') on the lower floor, and then
The first layer of semi-PC exterior wall board (3), which is formed so that a part of the reinforcing bars embedded in the same board protrudes from the C board, and the PC beam (4)
) and a half-PC floorboard (5). (See Figure 2) Next, the second layer of column reinforcing bars (2) is installed and connected to the first layer of column reinforcing bars (2), and the second layer of half-PC exterior wall panels (3) and PC beams (4) are installed. ), a semi-PC floorboard (5) is installed. (See Figure 3)
Next, after arranging the remaining 0 floor reinforcing bars and 00 wall reinforcing bars in the first layer on-site, the concrete of the columns that are not precast in the first layer, the inside of the semi-PC exterior wall board (3),
Concrete is poured on the semi-PC floor (5), and the first layer of concrete (6) is poured. (See Figure 4) Thus, the above-mentioned concrete frame (6) and the second layer half P
Shielded space (7) defined by C members (3) and (5)
The inside of (7') is heated and cured using a burner or the like, and the concrete structure is poured with the second and higher layers being constructed in at least two layers to construct a concrete structure.

Figure 5 shows the relationship between the semi-PC exterior wall board, the PC beam, and the semi-PC floor board. This involves pouring floor concrete onto the semi-PC floorboards (5) mounted on the PC beams (4). In the figure, (9) is the connection fitting for the upper and lower half-PC outer wall (3), and 00) is the half-PC outer wall (3).
) and the PC beam (4).

Figure 6 shows the joint between the column steel frame (1) and the PC beam (4). - The support plate 00 is attached to the column steel frame (1), and the support plate (II) and the PC beam (4) are protruded from each other. The joint plates q and q force are joined using bolts a and powder.

A connecting reinforcing bar is passed through between the web and flange of the column steel frame (1), and is connected to the main reinforcing bar at the upper end of the PC beam (4).

Figure 7 shows the construction status of the post-cast concrete inner wall.
A pair of wall forms (2) facing each other are arranged between the lower part of the C beam (4) and the floor, and the inner wall concrete is press-fitted through the concrete injection port 14a provided in the form (2). .

In addition, in case of snow accumulation, curing seeds are covered in advance on the semi-PC floorboard (5), and the snow is removed every time it snows.

(Effects of the Invention) According to the present invention, as described above, a steel column with two or more layers at the first joint is erected, column reinforcing bars for one layer are provided, and semi-PC external wall boards and PC beams are exposed to the outside air. and half-PC floorboards were erected in sequence.
Next, the second layer of column reinforcing bars, half-PC exterior wall boards, PC casings and half-P
After constructing the C floor plate in the same manner as the first layer, pour the first layer of frame concrete after placing the first layer floor and wall reinforcement, and define it with the same frame concrete and the second layer semi-PC members. This system creates a room that is isolated from the outside air and heats and cures the space between the rooms.Since the concrete does not come into direct contact with the outside air, there is no need for snow curing and construction can be performed year-round even in cold regions. Thermal curing of concrete is easily carried out.

In addition, by precasting the outer walls, beams, and upper floor members, formwork work is labor-saving, labor and administrative costs are reduced, construction period is shortened, and construction costs are reduced.

[Brief explanation of the drawing]

1 to 4 are longitudinal sectional views showing steps of an embodiment of the concrete structure construction method according to the present invention, and FIG. 5 is a column,
Figure 6 is a plan view showing the beam-column joint, Figure 7 is a vertical cross-sectional view showing the construction status of the inner wall, and Figures 8 and 9 are FIG. 10 is a side view of each column reinforcing bar in an open chain plane, and FIG. 10 is a layout diagram of the column steel frame. (1)...Column steel frame, (2)...Column reinforcing bar. (3)...Semi-PC exterior wall board, (4)...PC beam (5)
...Semi-PC floorboard, (6) ...Concrete (7)
...shielded space.

Claims (1)

[Claims] After erecting a steel column with two or more layers at the first joint and placing column reinforcement for one layer, half-PC exterior wall boards, PC beams, and half-PC
Install one layer of floorboards in sequence, then install the second layer of column reinforcement and half-P.
After constructing the C exterior wall boards, PC beams, and semi-PC floor boards in the same manner as for the first layer, the first layer of floor and wall reinforcement was placed, and the first layer of concrete was poured. A method for constructing a concrete structure, characterized by heating and curing a shielded space defined by a layer of semi-PC members, and repeating the above process for the second and higher layers.