JP2002256643A - Construction method for steel-framed reinforced concrete(src) structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance working efficiency and shorten a construction period with respect to a construction method for constructing, for example, an SRC structure by means of a half precast concrete floor slab. SOLUTION: In the construction method for the SRC structure, directly after a receiving angle 2 for placing the half precast concrete floor slab 5 is mounted on a steel-framed beam 1 so as to erect a steel frame, the floor slab 5 is laid via the receiving angle 2. After that, construction work for a beam form is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of building a steel reinforced concrete structure (SRC) using a half precast (PC) floorboard, for example.

[0002]

2. Description of the Related Art Conventionally, as a construction method using a half-PC floorboard in SRC construction, as shown in FIG. 1, abbreviated as S1; the same applies hereinafter), then beam formwork S2 is performed, and the half-PC floorboard is hung by a crane or the like, and the half-PC floorboard is laid S3 between girders. After that, the slab reinforcement S4 is constructed, and the attachment S21 of the steel beam on the upper floor (the second floor) is simultaneously constructed.

After the slab reinforcement S4, ready-mixed concrete is carried in and the column / beam joints, beams, and half P
Cast concrete on the C floorboard. At the same time, beam formwork S22 is performed in parallel on the second floor. Thereafter, as shown in FIG. 6, the building is performed while moving to the upper floor.

[0004]

However, in the conventional construction method, there is a limitation that the half PC floorboard must be suspended after the completion of the beam formwork (for example, S2, S22, or S32). is there. Further, in order to suspend the half PC floorboard, it is necessary to stand by so as not to disturb the installation work of the steel beam on the upper floor. As described above, the delay in laying the half PC floorboards causes an increase in the waiting time for the upper floor construction, and as a result, there is a problem that the overall construction period is also increased. The SRC construction method according to the present invention is proposed to solve such a problem.

[0005]

The gist of the present invention for solving the above-mentioned problems in the method of constructing an SRC structure according to the present invention is to provide a steel beam with a receiving angle for placing a half-PC floor plate and to construct a steel frame. Then, immediately after that, the half PC floorboard is laid through the receiving angle, and thereafter, the beam formwork is performed.

[0006] After the half PC floorboard is laid, the slab reinforcement, the beam formwork construction, and the upper frame steel beam installation work are simultaneously performed.

According to the SRC construction method of the present invention, a receiving angle is previously provided to a steel beam in a beam-arranged terrain. After that, the half PC floor panel can be hung by a crane before the beam formwork is performed by constructing the steel frame, and as a result, the installation work of the steel frame beam on the upper floor is completed by the half PC floor panel. Can be constructed immediately after installation. Therefore, the waiting time until the installation work of the steel beam on the upper floor had to wait for three steps of “steel frame construction, beam formwork construction, half PC laying” in the past. It can be constructed after two steps of "establishment and half PC installation". In addition, since the PC floorboard can be laid at an early stage, it is possible to temporarily place the reinforcing steel for slabs and other building materials, thereby improving work efficiency.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an SRC construction method according to the present invention will be described with reference to the drawings. To facilitate understanding of the present invention, portions corresponding to those of the conventional example will be denoted by the same reference numerals as those of the conventional example.

In the construction of the SRC structure of the present invention, as shown in FIG. 1, when the steel beam 1 is laid, a receiving angle 2 for placing a half PC floorboard is attached in advance. Specifically, as shown in FIGS. 2 and 3A, a metal (for example, steel) receiving base member 2a is welded to the web 1a of the steel beam 1 at predetermined intervals by welding means. In the longitudinal direction. Then, a steel L-shaped angle 2b is erected between the receiving base members 2a and fixed by welding means.

The L-shaped angle has a size of, for example, 65 × 65 × 9 (mm) and a length of about 300 mm. The receiving base member 2a is, for example, a steel and box-shaped. In addition, the beam main reinforcement 3, the stirrup 3a, the auxiliary reinforcement 3b, and the like are laid on the steel beam 1.

After the groundwork of the steel beam 1 has been constructed, a steel frame construction S1 is performed together with the steel beam 4 as shown in FIG. The steel beam 4 is erected in a direction perpendicular to the longitudinal direction of the half PC floor panel 5.

Next, the laying work S2 of the half PC floorboard 5, which is step 3 in the conventional example, is immediately performed. It should be noted that the half PC floor plate 5 has a size of 100 × 200 mm at a position corresponding to the position of the stud 4 a of the steel beam 4.
The required number of openings 5a are provided. Such,
The size of the half PC floor panel 5 is, as an example, 6.
As shown in FIG. 2, for example, four half PC floor boards 5 are suspended and laid by a crane or the like in one section as shown in FIG.

Then, as shown in FIG. 3 (B), the stud 4a for joining with the half PC floor plate is formed on the steel beam 4 as shown in FIG.
Is erected by welding means.

The half PC floor plate 5 is supported by the receiving angle 2 of the steel beam 1 instead of the conventional beam formwork. In this embodiment, the intermediate steel beam 4
Since half PC floorboard 5 is supported by the percentage of weight burden, as shown in FIG. 4, for example, the own weight of the half PC floorboard 5 is at 168 kg / ^{m 2,} the sum of the other miscellaneous load 300 kg / m ² , approximately 2 in the steel beam 4
A load of 20 kg / m ² is applied, and about 73% of the total load is applied. In the receiving angle 2, a load of 80 kg / m ² is applied, and the remaining load of about 27% is applied. Thus, the load on the receiving angle 2 is reduced by the steel beam 4.

Next, as shown in FIG.
While constructing the slab reinforcement S3 on the floorboard 5,
Installation work S21 of the steel beam 4 on the upper floor is performed. The steel beam 4 on the upper floor is on standby to suspend the half PC floorboard 5 on the lower floor.

Thereafter, the beam formwork S4 is carried out, and the laying work S22 of the half PC floorboard 5 is carried out simultaneously on the upper floor (for example, the second floor). After the formwork S4, concrete placing S5 is performed, and slab reinforcement S23 is provided on the upper floor, and a half P of the upper floor (for example, the third floor) is further provided.
The suspension S31 of the C floor panel 5 is simultaneously performed.

As described above, by laying the half PC floorboards 5 at an early stage, simultaneous construction with the upper floor can be carried out at an early stage, and the waiting time can be shortened. The construction period will also be reduced. That is,
As shown in FIG. 1, for example, the construction period L1 from the steel frame construction S1 on the first floor to the concrete placing S25 on the upper floor is shorter than the construction period L3 in the conventional example, as shown in FIG. .

Further, since the half PC floorboard 5 can be laid at an early stage, building materials such as slab reinforcing bars can be removed from the half PC floor plate.
The temporary placement on the C floor plate 5 becomes possible, and the work efficiency is also improved. In addition, the horizontal curing net between the layers can be removed at an early stage. By laying the half PC floor panel 5 at an early stage, it is possible to prevent scattering of sparks of welding and the like.

In the second embodiment of the present invention, as shown in FIG. 5, after the steel frame construction S1 and the work S2 for laying the half PC floorboard 5 are completed, the slab reinforcement S3a and the beam formwork of the floor are used. The construction S3b is performed simultaneously, and the steel beams 4 on the upper floor
Is also carried out at the same time.

According to the method of the second embodiment, the work of one floor is reduced to four steps, and the half PC floorboards 5 can be laid by the receiving angles without waiting for the work of the beam formwork. Since the work can be carried out early, the construction period L2 from the steel frame construction S1 to the concrete placement S24 on the upper floor is the same as in the first embodiment.
In this case, the construction period L1 is further shortened.

[0021]

As described above, the SR according to the present invention is
The construction method of the C-structure is to provide a receiving angle for placing a half-PC floor plate on a steel beam to construct a steel frame, and then immediately lay a half-PC floor plate through the receiving angle,
Since it is a construction method in which the beam formwork is performed afterwards, it is possible to lay the half PC floorboard first after the beam formwork by the receiving angle, and the waiting time of the steel beams on the upper floor is shortened, This has an excellent effect that the construction period is shortened. In addition, by laying half PC floorboards early, not only can slab reinforcement and construction materials be temporarily placed on half PC floorboards at an early stage, but also horizontal curing nets between layers can be removed at an early stage. This has an excellent effect of reducing material costs.

After the half PC floorboard is laid, by simultaneously performing the slab arrangement, the beam formwork construction, and the installation work of the steel beam on the upper floor, the overall construction period is greatly reduced. It has the effect that it has.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing the procedure and steps of an SRC construction method according to the present invention.

FIG. 2 shows a method for constructing an SRC structure according to the present invention;
It is a top view in the state where the half PC floorboard was laid.

FIG. 3 is a diagram showing a construction method of an SRC structure according to the present invention;
It is the front view (A) which shows a mode that the half PC floorboard is supported by the receiving angle provided in the steel beam, and the side view (B) in the state which stood upright on the steel beam.

FIG. 4 is a diagram showing a construction method of an SRC structure according to the present invention;
It is explanatory drawing which shows the support state of the load of a half PC floorboard.

FIG. 5 is an explanatory view showing a procedure and steps of an SRC construction method according to a second embodiment of the present invention.

FIG. 6 is an explanatory view showing procedures and steps in an SRC construction method according to a conventional example.

[Explanation of symbols]

1 steel beam, 2 receiving angle, 2a receiving base member, 2
b L-shaped angle, 4 steel beam, 4a stud, 5
Half PC floorboard, 5a opening, LI, L2, L3
Construction period.

Continued on the front page (72) Inventor Takeshi Kaei 2-13-12 Shirogane, Chuo-ku, Fukuoka Toda Construction Co., Ltd. Kyushu Branch (72) Inventor Rikuyasu Kono 1-1-11-15 Kitako, Nishi-ku, Yokohama Toda Construction Co., Ltd. Company Yokohama Branch

Claims (2)

[Claims] 1. A steel beam is provided with a receiving angle for placing a half-PC floor plate, and a steel frame is constructed. Thereafter, a half-PC floor plate is immediately laid through the receiving angle, and then a beam formwork is performed. A method of constructing an SRC structure. 2. The SRC structure according to claim 1, wherein after the half-PC floorboard is laid, the slab reinforcement, the beam formwork construction, and the steel beam mounting work on the upper floor are simultaneously performed. How to build.