JP2990216B2 - Construction method of reinforced concrete building - Google Patents

Description

The present invention relates to a method for constructing a reinforced concrete building.

[Prior art] Conventional reinforced concrete building construction methods include:
Vertical members such as pillars and horizontal members such as beams and floor slabs are separately cast in concrete, or a beam form is attached to the head of a column form, and There was a method of setting a floor slab formwork or a semi-PC floor slab member and pouring concrete at once.

[Problems to be Solved by the Invention] However, the above-mentioned construction method based on the separate casting of concrete guarantees the quality of concrete, but since the concrete casting is performed twice, the construction period becomes longer. There is a point, and the method of placing concrete horizontally and vertically at the same time from the floor slab has an advantage in the process, but the concrete placement of the column under the beam must be carried out through overcrowded beam bars. Therefore, there is a problem that it is difficult to ensure the quality of concrete.

The present invention has been made in order to solve the above-mentioned conventional problems, and an object thereof is to secure the quality of cast concrete and shorten the concrete casting process to shorten the construction period. It is an object of the present invention to provide a method of constructing a reinforced concrete building capable of performing the following.

[Means for Solving the Problems] According to the construction method of a reinforced concrete building of the present invention, a beam formwork is erected between column heads, and a beam prefabricated reinforcing bar is set in the formwork. A half-PC floor slab member is set on the column, a column bar is joined on the head of the column, and a half-PC column hollow member is attached around the column reinforcing bar.
Concrete is cast at once on the floor slab member and in the half PC column hollow member.

In addition, a beam formwork is erected between the column heads, a beam prefabricated reinforcing bar is set in the formwork, a half-PC floor slab member is set on the beam formwork, and a column is set on the column head. At the same time as joining the bars, a half PC column hollow member is attached around the column reinforcing bar, and concrete is first poured into the beam formwork below the slab, and then the half
Concrete was poured into the hollow member of the PC column, and finally a half
It is characterized by placing concrete on PC floor slab members.

Further, the semi-PC column hollow member is provided with a spill-out prevention means such as a metal lath below the leg portion.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a beam form, which is built between the heads of the columns 2 constructed in the previous step. Reference numeral 3 denotes a support for the beam formwork 1.

When the installation of the beam formwork 1 is completed, as shown in FIG. 2, a beam prefabricated reinforcing bar 4 previously laid on a factory or on the ground at the site is set in the beam formwork 1.

Subsequently, as shown in FIG. 3, a half-PC floor slab member 5 previously manufactured at a factory or on the ground at a site is set on the beam formwork 1.

When the setting of the half-PC floor slab member 5 is completed, as shown in FIG. 4, the column reinforcing bar 6 is joined to the head of the column 2 and, around the column reinforcing bar 6, a factory or the ground on the site is set in advance. The half PC column hollow member 7 manufactured in the above is attached. The half-PC column hollow member 7 may be a member formed by assembling a plurality of members or an integral hollow member.

As described above, the beam formwork 1, the half PC floor slab member 5, and the half PC
When the installation of the hollow column member 7 is completed, as shown in FIG.
Concrete C is cast into PC column hollow member 7 at one time. In this case, a concrete pump (not shown) drives the inside of the beam formwork 1 and the half PC floor slab member 5, and
The PC column hollow member 7 may be driven by a concrete bucket (not shown) to change the driving method.

In addition, as shown in FIG. 6, a metal lath 8 may be attached to the lower part of the half PC column hollow member 7 below the leg to prevent the slag of concrete poured into the half PC column hollow member 7 from flowing out.

In the above embodiment, concrete was cast at once. First, concrete C was cast in the beam formwork 1 to below the slab.
Subsequently, the concrete C is poured into the half PC column hollow member 7 and finally the concrete C is placed on the half PC floor slab member 5.
May be cast.

[Effects of the Invention] (1) Since concrete can be cast in a single operation, the number of steps can be reduced.

(2) Since the column concrete is not cast in a densely arranged state, aggregate separation or the like does not occur, and high quality can be ensured.

(3) Since a half PC column hollow member is used for the column, labor saving can be achieved.

(4) It can be used for construction methods of high-rise reinforced concrete apartment buildings and high-rise office buildings.

[Brief description of the drawings]

1 to 5 are construction explanatory diagrams sequentially showing one embodiment of the method of the present invention, and FIG. 6 is an enlarged explanatory diagram of a lower portion of a leg portion of a half PC column hollow member. 1 ... beam formwork, 2 ... column, 3 ... support, 4 ... beam rebar, 5 ... half PC floor slab member, 6 ... column rebar, 7 ... half
PC column hollow member, 8: metal lath, C: concrete.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04B 1/16

Claims (3)

(57) [Claims] 1. A beam form is erected between the column heads, a beam prefabricated reinforcing bar is set in the form, a half-PC floor slab member is set on the beam form, and the column head is mounted. At the same time, a column bar is joined to the column bar, and a half-PC column hollow member is attached around the column bar, and concrete is cast at once in the beam formwork and the half-PC column hollow member on the half-PC floor slab member. Construction method of reinforced concrete building characterized by the following. 2. A beam form is erected between column heads, a beam prefabricated reinforcing bar is set in the form, and a half-PC floor slab member is set on the beam form. At the same time as joining the column reinforcement, a half PC column hollow member is attached around the column reinforcing bar, concrete is first cast into the beam formwork below the slab, and then concrete is poured into the half PC column hollow member And finally put concrete on the semi-PC floor slab members. 3. The method of constructing a reinforced concrete building according to claim 1, wherein a means for preventing spillage of a metal lath or the like is provided below the leg of the hollow half-PC column member.