JPH05112983A - Construction of reinforced concrete building - Google Patents

Abstract

PURPOSE:To greatly shorten the period of construction, perform construction work by lesser power safely, and raise the quality of construction work. CONSTITUTION:A dead column PCa 1 to be used as a part of reinforced concrete column to be constructed is set, a steel-framed truss beam 3 is built up in the span direction on the upper part of the column PCa 1. Column reinforcing bars are arranged around the column PCa 1 and a column formwork is arranged. A beam formwork and floor-half PCa panels are attached and concrete is integrally placed into the beam formwork and the column formwork and on the floor-half PCa panels.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a high-rise reinforced concrete building such as an apartment house, a hotel or an office building.

[0002]

2. Description of the Related Art Generally, a method of constructing a reinforced concrete building with a rigid frame structure is a construction method with poor construction efficiency.
Conventionally, in the construction method of this kind of building, the construction efficiency was improved by adopting the method of assembling the column and beam reinforcements first, but in many cases the construction was carried out in an unstable assembly state. ..

Conventionally, there is an example in which a PCa member is partially used, but the mounting state of the PCa member is unstable,
There was a problem in construction safety.

Furthermore, conventionally, a half PCa is installed on the floor or balcony.
Although there is a construction method using members, there is a problem in that the column formwork and the wall formwork must be firmly assembled.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art. The object of the present invention is to greatly reduce the construction period, save labor, and carry out construction safely. It is to provide a construction method of a reinforced concrete building that can be improved and the quality can be improved.

[0006]

According to the method for constructing a reinforced concrete building of the present invention, a buried pillar PCa member to be used as a part of a reinforced concrete column to be constructed is built, and a spanwise steel truss beam is provided above it. Erection, assemble the rear pillar formwork with the reinforcement of the pillars around the buried pillar PCa member, and attach the beam formwork and floor half PCa plate,
It is characterized in that concrete is integrally placed in the pillar formwork, the beam formwork and the floor half PCa plate. The steel truss beam is integrally fixed to the large diameter reinforcing bar provided on the upper portion of the buried pillar PCa member. Also, the outer wall
Use PCa materials for balconies, corridors, etc. Further, the floor half PCa plate may be a semi-hollow PCa plate.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a buried pillar PCa member, which is built at the center of the pillar. The buried pillar PC
The a member 1 is a reinforced concrete (RC) prismatic member having a height up to the bottom of the beam, as shown in an enlarged view in FIG. 2, and its outer peripheral surface is intended to be integrated with post-cast concrete. The cotter 1a is formed on the. A large diameter reinforcing bar 1b is fixed at the center of the upper part of the column and extends upward.

In FIG. 2, 1c is a support flange for receiving a beam member described later, 1d is a fixture for fixing the beam member, 1e is a base plate, and 1f is a brace plate. The buried pillar PCa member 1 is not limited to the prism, and may have any cross-sectional shape such as a cylinder or a polygonal pillar, and may be reinforced by a cylindrical mesh bar or the like instead of the reinforcing bar. Good.

As shown in FIG. 1, an embedded pillar 2 for supporting the beam member is erected at an appropriate position in the earthquake-resistant wall constructed between the embedded pillar PCa members 1.

Next, as shown in FIG. 3, the buried pillar P
On the Ca member 1 and the buried pillar 2, a spanwise steel truss beam 3 is suspended and installed. The steel truss beam 3
As is clear from FIG. 4, the angle members 3a arranged inward at the four corners are integrally assembled by the reinforcing bars 3b.

Mounting plates 3c and 3d are attached to the upper and lower surfaces of the ends of the steel truss beam 3, and the large-diameter rebar 1b of the buried pillar PCa member 1 is inserted into the holes formed in the mounting plates 3c and 3d from below. It is skewered. The mounting plate 3d is a support flange 1c
The steel truss beam 3 supported by the upper portion of the mounting plate 3c is fastened by the fixture 1d to fix it to the pillar PCa member 1.

Four anchor bolts 3e are attached to the mounting plate 3c to fix the base plate 1b of the buried pillar PCa member 1 on the upper floor. Side plates 3f are attached to both side surfaces of the end portion of the steel truss beam 3, and mounting bolts 3g are mounted on the side plates 3f to fix an outer wall PCa member described later.

When the installation of the steel truss beam 3 is completed, next, as shown in FIG. 5, a column reinforcing bar 4 is laid around the buried column PCa member 1 and a seismic resistance is provided below the reinforcing bar truss beam 3. Arrange the wall reinforcement 5 of the wall. Also, the buried pillar P
Beam reinforcement 6 in the direction of the girder is arranged on the Ca member 1.

Upon completion of the reinforcing work, subsequently, as shown in FIG. 6, the column form 7, the wall form 8 and the beam forms 9, 9'are assembled, and the wall PCa member 10 in the direction of the girder is attached. As shown by an imaginary line in FIG. 4A, the mounting bolt 3g is used for mounting.

When the work of mounting the formwork is completed, the floor half PCa plate 11 is set as shown in FIG. in this case,
The floor half PCa plate 11 is supported by a support 12 and, as shown in FIG. 4 and FIG.
It is supported by a bracket 3h of a side plate 3f 'attached to the outer surface of the. In addition, a hollow floor half PCa plate is formed by attaching an eslenoid void 11 ′ on the floor half PCa plate 11 so as to reduce the weight and eliminate the need for a beam.

As shown in FIG. 9, slab reinforcements 13 are arranged on the set floor half PCa plates 11, and concrete C is integrally cast on columns, walls, beams and slabs. 1
Reference numeral 4 denotes a balcony PCa member, which is supported by the support work 15. Above concrete C is this balcony P
The Ca member 14 is also placed on the floor surface for integration.

When the work for placing concrete C is completed,
As shown in FIG. 1 again, the buried pillar PCa member 1 is built on the upper floor, and each construction work on the upper floor is repeated.

In the above embodiment, the method of constructing a reinforced concrete building by the method of stacking one floor at a time has been described. Next, a method of simultaneously constructing two floors will be described.

In FIG. 10, the N-th floor buried pillar PCa member 1, the buried pillar 2 and the steel truss beam 3 are built into the pillars, walls, beams and slabs of the lower floor (N-1 floor). Place concrete C.

Next, as shown in FIG. 1 (not shown), pillar reinforcements 4 and beam reinforcements 6 in the girder direction are arranged around the buried pillar PCa member 1 and the floor half PCa plate 11 is arranged. set. Subsequently, as shown in FIG. 12, the wall reinforcing bars 5 are arranged and the wall PCa member 10 is built.

Simultaneously with the above work, the buried pillar PCa member 1 and the buried pillar 2 are built on the upper floor (N + 1 floor), and the balcony PCa member 14 is attached. continue,
As shown in FIG. 13, the steel truss beam 3 is hung and attached on the buried pillar PCa member 1 and the buried pillar 2.

At the same time when the steel truss beam 3 is attached,
On the Nth floor, the pillar formwork 7, the wall formwork 8 and the beam formwork 9 and 9'are assembled, concrete C is placed on the pillars, walls, beams and slabs on the Nth floor, and the above work is repeated.

[0023]

【The invention's effect】

1) Buried pillar PCa used as part of the pillar of the building body
By supporting steel truss beams and floor half PCa plates with members and also serving as support work, work on the upper floor can be carried out simultaneously with or prior to the reinforcement work and formwork construction of columns and walls,
Not only can the construction efficiency be improved and the construction period can be shortened, but also a high quality building can be constructed by using the buried pillar PCa member as an assembly ruler for reinforcing bars and steel frame members. 2) Since steel truss beams are used for the beams on the span direction seismic wall, it is easy to support the floor half PCa plate and the beam reinforcement work can be omitted. 3) The steel truss beam can be integrally assembled by the large diameter reinforcing bar provided on the upper portion of the buried pillar PCa member, so that the quality can be improved and the work safety can be achieved. 4) Either a laminated construction method in which each floor is stacked or a construction method in which two floors are simultaneously constructed can be adopted.

[Brief description of drawings]

FIG. 1 is a construction explanatory view showing a built-in state of a buried pillar PCa member.

FIG. 2 is a structural explanatory view of a buried pillar PCa member.

FIG. 3 is a construction explanatory diagram showing a mounting state of a steel truss beam.

FIG. 4 is a construction explanatory view showing an assembled state of a buried pillar PCa member and a steel truss beam.

FIG. 5 is a construction explanatory view showing a reinforcing work.

FIG. 6 is a construction explanatory view showing a mounting state of the formwork.

FIG. 7 is a construction explanatory view showing a work of attaching a floor half PCa plate.

FIG. 8 is a cross-sectional view showing a supporting state of a floor half PCa plate by a steel truss beam.

FIG. 9 is a construction explanatory view showing a concrete placing work.

FIG. 10 is a construction explanatory view showing a concrete placing operation of the second embodiment.

FIG. 11 is a construction explanatory view showing the work of attaching and arranging the floor half PCa plate of the second embodiment.

FIG. 12 is a construction explanatory view showing the work of building the buried pillar PCa member on the N + 1st floor of the second embodiment.

FIG. 13 is a construction explanatory view showing an attachment work and the like of a steel frame truss beam on the N + 1th floor of the second embodiment.

[Explanation of symbols]

 1 Buried pillar PCa member 1a Cotter 1b Large diameter rebar 1c Support flange 1d Fixture 1e Base plate 1f Brace plate 2 Buried pillar 3 Steel frame truss beam 3a Angle member 3b Rebar 3c Mounting plate 3d Mounting plate 3e Anchor bolt 3f Side plate Side plate 3g Mounting bolt 3h Bracket 4 Column rebar 5 Wall rebar 6 Beam rebar 7 Column form 8 Wall form 9 Beam form 9'Beam form 10 Wall PCa member 11 Floor half PCa plate 12 Support work 13 Slab reinforcement 14 Balcony PCa Member 15 Shoring C concrete

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shunzo Saito 58-7 Kamima, Aso-ku, Kawasaki-shi, Kanagawa Prefecture (72) Inventor Keiji Katayama 545-1 Higashi-Asagawa-cho, Hachioji-shi, Tokyo

Claims (4)

[Claims] 1. A buried pillar PCa member to be used as a part of a reinforced concrete pillar to be constructed is built, a steel truss beam in a span direction is erected above the member, and the buried pillar P is installed.
Assemble the post-column formwork with bar reinforcements around the Ca member, attach the beam formwork and floor half PCa plate, and install concrete in these column formwork, beam formwork and floor half PCa plate. A method of constructing a reinforced concrete building characterized by being cast integrally. 2. The method for constructing a reinforced concrete building according to claim 1, wherein a steel truss beam is integrally fixed to a large-diameter reinforcing bar provided on an upper portion of the buried pillar PCa member. 3. The method for constructing a reinforced concrete building according to claim 1, wherein a PCa member is used as a member such as an outer wall, a balcony, and a corridor in the direction of the girder. 4. The method for constructing a reinforced concrete building according to claim 1, wherein the floor half PCa plate is a semi-hollow PCa plate.