JPH0796804B2 - How to build a building - Google Patents

Description

TECHNICAL FIELD The present invention relates to a building construction method capable of rationalizing and shortening a floor skeleton construction construction by early securing upper floor work.

(Prior Art) Generally, in constructing a construction structure, it is possible to shorten the construction period by carrying out each process such as lifting machine work, reinforcing bar arrangement, form laying, concrete placing, etc. as efficiently as possible. Will be important above.

In conventional cast-in-place concrete work,
As shown in the figure, it is general that a specific structural body such as a wall, a pillar or a beam on the Nth floor and a floor on the N + 1th floor are simultaneously cast.

(Problems to be solved by the invention) However, as for the cast-in-place concrete, the next work cannot be carried out for that portion until the predetermined strength is exhibited after the casting, so in the above example, the floor on the N + 1 floor Immediately after placing concrete, it is not possible to use the floor as a work floor to perform work on the N + 1 floor walls, columns, beams, reinforcing bars, formwork, etc., which is the biggest obstacle to shortening the construction period. It was.

Therefore, a construction method has been proposed in which the floor is molded from a PC board (precast concrete board), and it is used as a work floor immediately by simply hoisting it at a predetermined position on the site.

However, in this construction method, conventionally, the pillars and beams on the lower floor had to be completed to a state where at least the upper floor PC floor could be supported.

However, when the pillars and beams have a cast-in-place RC structure (reinforced concrete structure), the lower floor is used as the working floor when the pillars and beams are reinforced and the formwork is performed at the construction site. It is necessary to work on a scaffold, etc., while working at a place, and since there are many upward working states, workability is poor and there is a safety problem.

Further, since the work is performed in a state where there is nothing on the upper floor, there is a drawback that the work is interrupted in case of rain.

In view of such a conventional problem, the present invention can secure an upper floor work floor at a construction site at an early stage regardless of which construction method is adopted, which can significantly improve work efficiency and safety. The purpose is to provide a construction method.

(Means for Solving Problems) In order to achieve the above-mentioned object, the method for constructing a building according to the present invention is such that a predetermined supporting work is installed on a lower floor constructed in advance, and the upper support is provided by the supporting work. The floor is supported, and the upper floor is constructed prior to the structural frames such as columns, beams, and walls of the lower floor, and then the lower floor and upper floor are used as working floors, and the columns and beams of the lower floor are used. It is characterized in that a structural body such as a wall is constructed.

(Examples) Hereinafter, preferred examples of the present invention will be described with reference to the drawings.

1 to 3 are conceptual views showing an embodiment of the present invention, and FIGS. 1 and 2 are process explanatory views and conceptual perspective views showing a method of constructing a building according to the present embodiment, respectively. is there.

Therefore, in the present embodiment, first, as shown in FIG. 1 (a), a predetermined supporting work 2 is installed on the lower floor 1 that is built in advance, and the upper support 3 is supported by the supporting work. do it,
The lower floor is constructed prior to the structural frame such as pillars 4, beams 5, walls (not shown) on the lower floor, and then the upper floor 3 is used as a working floor as shown in FIG. 1 (b). Pillars, beams 5, walls, and other structural frames, and then so-called partition walls, equipment, etc.
The next member (not shown) is attached.

In this embodiment, the floors 1 and 3 are both PC floorboards (precast concrete floorboards).
Immediately after the installation, the floor 3 can be used as a work floor to shift to the construction work on the lower floor.

As the supporting work 2, it is necessary to surely support the PC floor plate 3 which is a considerable weight without any other supporting member. Therefore, in this embodiment, a supporting jig as shown in FIG. 3 is used. is doing.

The support jig 2 includes four floor support parts 21 and each floor support part 21.
A pair of upper and lower frames 22 that tightly connect the
It is composed of 23 and.

The floor support portion 21 is composed of a so-called strong support known in the present embodiment, and is a support plate 21a disposed at the upper and lower ends.
The mounting plate 21b is screwed to the main body 21c, and the level can be adjusted by changing the screwing position.

Then, in supporting the upper floor PC floor plate 3, as shown in FIG. 2, first, a plurality of supporting jigs 2 are installed at predetermined positions on the lower floor 1 at predetermined intervals.

Next, each upper floor PC floor plate 3 is hoisted and moved from a stock position on the ground to a predetermined installation position by a lifting machine such as a crane, and is preliminarily positioned on each supporting jig 2 and sequentially mounted. Just go.

The support jig 2 can also be used as a simple scaffold at the time of attaching the secondary member in the previous period by providing a work table or the like on which the worker can ride in advance at the intermediate position. .

In addition, the PC floor boards 1, 3, ... On each floor are designed so that the unit PC boards 6 shown in FIG.
The plate 6 may be formed as a so-called semi-PC plate as shown in FIGS. 4 and 5.

That is, the half-PC board 6 is provided with at least one or more on-site joints 7 in the peripheral portion, and the completed floor portion having a predetermined thickness is formed in the other peripheral portion and the central portion 8. Yes,
After installation in place, the completed floor can be used immediately as a work floor, after which the on-site joint 7 and the adjacent on-site joint 7 of the other half-PC board 6 can be integrated by in-situ concrete or the like. It has become.

In this embodiment having such a configuration, by using the support jig 2, the upper floor 3 can be constructed before the pillars, beams, etc. on the lower floor can be constructed, and the upper floor 3 can be immediately worked. Since it will be used as a floor and will be put into preparations for building the pillars, beam walls, etc. on the lower floor, it will be possible to secure an upper floor work floor earlier than previously possible with the RC structure, which will increase work efficiency and further affect the weather. Since it does not receive it, the construction period can be greatly shortened.

As for the pillars, beams, walls, etc. of the lower floor, since the upper floor 3 is used as a working floor, it is possible to perform the pouring work of the cast-in-place concrete from the upper floor 3, so that the lower floor can be placed as in the conventional case. There is no need to separately perform complicated and dangerous scaffolding work on the floor 1, and the downward work from the upper floor 3 can be performed efficiently, safely and reliably.

In addition, the required number of support jigs 2 are prepared in advance for a plurality of layers, and before the construction work of the pillars, beams, walls, etc. on the lower floor, the above-mentioned upper floors are also arranged above. By arranging the upper floors 3 sequentially in the same manner and repeating this, it is possible to advance the temporary construction work of the floors for a plurality of layers. In this case, the columns and beams on each floor , Wall reinforcement,
It is possible to plan work such as formwork and concrete placement as completely separate processes, and it becomes possible to save labor on site by a more rational construction plan.

At this time, it goes without saying that the supporting jig 2 has a strength sufficient to safely support the weight of the upper body.

In addition, the supporting jig 2 can be disassembled and assembled, so that the supporting jig 2 that has become unnecessary in the lower layer can be diverted to the upper layer in sequence.

In addition, the above embodiment shows an example of a building having an RC structure with columns, beams and the like, and in such a case, a particularly remarkable effect can be exhibited, but the present invention is not limited to this, and the upper floor In addition to 3, in the case of the PC construction method where columns, beams, etc. are PC members, or SR
It is needless to say that it can be applied to the case of the C construction method and the like, and in this case as well, it is possible to obtain the operational effects according to the example of the RC structure.

Further, in the above-described embodiment, an example in which the support jig 2 having the above-described configuration is used as the support work has been described, but other suitable support work can be used, and the configuration is not limited.

Furthermore, the upper floor 3 is preferably a PC floorboard or a semi-PC floorboard from the viewpoint that it can be used as a work floor immediately after installation, but depending on the construction plan, it can also be a cast-in-place concrete floor, etc. It goes without saying that various modifications are possible without departing from the gist of the present invention.

(Effects of the Invention) The present invention is configured as described above, and a predetermined supporting work is installed on the lower floor constructed in advance, the upper floor is supported by the supporting work, and the upper floor is lowered. It is constructed before the structural frames such as columns, beams and walls on the floor, and then the lower floor and upper floor are used as working floors to construct the structural frames such as columns, beams and walls on the lower floor. This is because it is possible to secure the upper floor work floor early in any structure type building, thus rationalizing and improving the efficiency of site construction work and improving safety. It is a thing.

[Brief description of drawings]

FIG. 1 is a process explanatory view showing an embodiment of a construction method according to the present invention, FIG. 2 is a schematic perspective view showing an installation mode of an upper floor, and FIG. 3 shows a structure of a support jig as a support work. 4 is a schematic perspective view showing another embodiment of the floor according to the present invention, and FIG. 6 is a conceptual diagram showing a conventional construction method. 1 ... Lower floor, 2 ... Support work (support jig), 3 ... Upper floor, 4
… Pillars, 5… Beams, 6… Unit PC floorboards, 7… Site joints, 8…
Center.

Claims (2)

[Claims] 1. A structural frame such as a pillar, a beam or a wall of a lower floor, in which a predetermined supporting work is installed on a pre-constructed lower floor and the upper support is supported by the supporting work. A method for constructing a building, characterized in that the structure is constructed earlier, and then the lower floor and the upper floor are used as working floors to construct a structural body such as a pillar, a beam, and a wall on the lower floor. 2. The method for constructing a building according to claim 1, wherein the floor is formed of a precast concrete plate.