JP3035139B2 - Floor slab construction method for multi-story buildings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a floor slab of a multi-story building.

[0002]

2. Description of the Related Art In recent years, the construction of floor slabs of multi-story buildings, whether they are low-rise or middle-rise or high-rise, first constructs the floor slab on the first floor, and then performs steelwork on the upper floor. Next, there is a tendency to take measures to prevent rainfall by laying a deck plate for a roof slab, and thereafter to take measures to sequentially build a floor slab from the second floor up.

[0003] By the way, after the above-mentioned steel frame construction, the skeleton construction materials and the finishing construction materials and equipment are carried into the work site on each floor, for example, of the skeleton construction materials and finishing construction materials and materials unloaded from the transport vehicle. Bulk heavy construction materials are lifted with a jib crane installed on the roof using the temporary lifting openings formed in the floor slab, and materials and equipment for finishing work are used for temporary lifts and It is common to lift by an elevator, and after lifting, transport these horizontally to a work site by using a forklift or human power.

[0004]

However, the above-mentioned lifting plan has the following problems. The transport distance in the horizontal direction after unloading from the transport vehicle becomes very long, and a large amount of labor is required. The larger the floor area, the more the jib crane and the number of temporary lifts and elevators need to be installed, and the larger the number of temporary openings, so the timing of closing the openings adversely affects the finishing process. In addition, the cost of safety measures against crash disasters is also high. It requires many operators for lifting equipment such as jib cranes and lifts, and detailed operation plans for these,
In addition, disruptions in the operation plan due to emergency lifting may lead to disruptions in the construction process. It takes a lot of time and effort to transfer materials and equipment to the lifting equipment and to switch the horizontal transfer from the lifting equipment.

[0005] As a means for solving such a problem, at the time of constructing a floor slab of each floor, an opening for passing a vehicle is formed in the floor slab, and an H-shaped steel, an I-shaped steel or the like is formed over the upper and lower openings. The first step is to construct a ramp for running the vehicle using heavy temporary materials such as steel and coated steel sheets, and to transport transport vehicles loaded with building construction materials and materials for finishing work directly to the work sites on each floor. ,Conceivable.

However, when the lifting plan is actually examined, the above-mentioned solution requires a lot of heavy temporary materials for the installation of the slope, and requires a great deal of labor to install and dismantle the slope. It takes a long time, and after removing the slope with heavy temporary materials, carrying in the materials for permanent construction to close the opening,
It has been found that new problems arise in both the construction cost and the construction period, such as the necessity of many openings closing work such as reinforcement arrangement and concrete placement.

Accordingly, the present invention provides both a construction cost and a construction period in which the above-mentioned new problem can be avoided while fully utilizing the advantage of installing a vehicle running slope in a building under construction. The present invention proposes a superior floor slab construction method for multi-story buildings.

[0008]

The technical measures taken by the present invention to achieve the above object are as follows. That is, the floor slab construction method of a multi-story building according to the present invention comprises the steps of: converting a small slab constituting a part of the floor slab into a remaining floor slab such that an opening for vehicle passage is formed at a construction site of the small slab. Separately, and provided diagonally over the upper and lower openings to form a slope for vehicle travel, and when the slope is no longer needed, a small slab constituting the slope is structured around a predetermined opening. It is characterized in that it is connected to a steel frame and concrete is poured into the space around the small slab to complete the floor slab.

In carrying out the above method, a small slab prepared in advance may be suspended and installed diagonally, but a beam steel frame for the small slab is obliquely attached to a predetermined position of the structural steel frame. It is desirable to form a concrete slab by providing a concrete formwork in this beam steel frame, and by arranging reinforcing bars and concrete laying in the formwork.

[0010]

[Function] According to the above construction method, a transport vehicle loaded with building construction materials and finishing equipment can be directly passed through the slope to the work site on each floor, so that the lifting work can be efficiently performed. It can be carried out. Moreover,
Using the structural material for the main construction, that is, when a small slab that originally constitutes a floor slab is constructed diagonally, a slope for vehicle traveling is formed, and when the slope is no longer necessary,
Since the floor slab is constructed by closing the opening for vehicle passage with the small slabs constituting this slope and casting concrete in the space around the small slab, when the slope is made of heavy temporary materials, Such problems can be avoided.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a building in the middle of construction. Specifically, an underground structure 1 is constructed, and a floor slab 2 for the first floor is provided above the underground structure 1.
2 and 3, as shown in FIGS. 2 and 3, a column steel frame 4, a large beam steel frame 5, and a small beam steel frame 6 are erected along with the column 3 of the underground structure 1 to the roof, and first, a roof slab is formed. 7, or a deck plate for the roof slab 7 is laid, and thereafter, a floor slab 8 is constructed on the girder steel frame 5 or the small beam steel frame 6 of each floor. Reference numeral 9 denotes an S or SRC column.

As shown in FIGS. 2 and 3, a floor slab 8 excluding the first floor has a large beam steel 5 erected over a column steel 4 erected at a predetermined interval, and a large beam steel framing in different directions. As shown in FIGS. 4, 6, and 7, a concrete driving form 10 composed of a deck plate is laid over the upper surface of the small beam steel frame 6 erected between 5, 5 and slab reinforcement is provided (not shown). It is constructed by casting concrete to bury the slab reinforcement.

When constructing the floor slab 8, FIG.
As shown in FIGS. 3 and 4, for example, the first to fourth small slabs 8a to 8d in a range extending over 1 span × 4 spans of the column steel frame 4 (a range corresponding to the hatched zone A in FIG. 2) are formed. The small slabs 8a to 8d are formed separately from the remaining floor slabs 8e in a state where the openings 12 for vehicle passage are formed in the construction locations of the small slabs 8a to 8d. And attached to the column steel frame 4 for the remaining floor slab 8e,
A metal crossing plate 22 that fills a gap is provided between each of the small floor slabs 8e and the remaining floor slabs 8e and between the small slabs, thereby forming a slope S for running the vehicle.

Although not shown, handrails for disaster prevention are erected around the left and right spaces on the left and right sides of the small slabs 8a to 8d, respectively, and a disaster prevention net is provided to cover the space above the handrails. And take safety measures.

The first and third small slabs 8a and 8c on the lower side and the middle part of the slope are further provided on both outer sides of the two small beam steel members 6 extending over the large beam steel members 5 and 5 around the opening portion 12, respectively. 5 and 6, a concrete driving form 13 made of a deck plate is provided at an intermediate portion in the longitudinal direction across the steel beams 6, and the concrete driving form 13 is provided. Weir plate 14 around
And slab reinforcement (not shown) is provided, and concrete is cast to bury the slab reinforcement.

As for the second and fourth small slabs 8b and 8d, as understood with reference to FIG.
A further steel beam 6 is added between the small beam steel members 6 extending over the large beam steel members 5 and 5 to be erected, and a concrete driving formwork 15 composed of a deck plate is provided over these small beam steel members 6. In addition, a weir plate 16 is erected around the periphery of the concrete driving formwork 13, slab reinforcement (not shown) is provided, and concrete is cast so as to bury the slab reinforcement. .

Since the steel beam 5 at the top of the slope is used for the construction of the fourth small slab 8d, the open beam end of the floor slab connected to the inclined upper end of the fourth small slab 8d has Is provided with another small beam steel frame 5a.
Then, the weir plate 17 is erected on the girder steel frame 5 around the opening 12 including this, the slab arrangement is performed, and concrete is cast, so that the remaining floor slab 8 is formed.
e.

When the first small slab 8a is constructed, FIG.
As shown in FIG. 7, both ends of the small beam steel frame 6, which is originally connected to the gusset plate 18 attached to the large beam steel structure 5 around the opening 12, stand on the large beam steel structure 5 around the lower opening 12. At the time of constructing the third small slab 8c, as shown in FIG. 6, both ends of the third temporary slab 8c are to be constructed when the third temporary slab 8c is constructed. The temporary member 20 suspended from the girder steel frame 5 around the opening 12 is connected with a predetermined slope angle, and concrete is poured in this state.

In constructing the second and fourth small slabs 8b and 8d, as can be understood with reference to FIG. 4, an erecting member 21 similar to the above-mentioned temporary rising member 19 or hanging temporary member 20 is used. The ends of the large beam steel structure 5 are connected to the column steel structure 4 so that the small beam steel structure 6 has a predetermined slope angle, and concrete is cast in this state.

As apparent from FIG. 1, the first floor and the second floor are designed to have a higher height than the other floors, and the angle of the slope S is the same as the other floors. In order to set the slope angle, the slopes S for vehicle traveling on the first and second floors are provided with triangular metal slope bodies 23, respectively.

As is clear with reference to FIGS. 3 to 6, a metal protection plate 24 is provided on the upper surface of each of the small slabs 8a to 8d so that a running flaw caused by the transport vehicle is not formed on the slab surface. Provided. However, with respect to the upper-level slope S, the protection plate 24 may be provided only for the lower-level slope S because the traveling frequency of the transport vehicle is low and a traveling flaw is not easily formed.

As described above, the slope S for running the vehicle over the floor slabs 8 on the upper and lower floors is formed in the building under construction, so that the transport vehicle enters the work site where the cargo is required, and Unloading can be performed at a position, for example, when a load is transferred to a jib crane or an elevator and re-transported horizontally, a dramatic reduction in time and labor can be achieved. .
Also, compared to jib cranes and elevators, there is less waiting time for lifting, so the space required for unloading on the first floor can be reduced.

In addition, it is possible to reduce the number of lifting equipment corresponding to the lifting capacity by the slope S, and the number of jib cranes, lifts, and elevators installed reduces the dangerous work of disassembly and assembly. In addition, since the number of temporary openings for lifting is reduced, the danger area of a crash disaster is reduced, so that the cost for safety measures can be reduced.

In particular, if the equipment to be provided on each floor is also lifted by using the above-described vehicle running slope S, the equipment and equipment may be replaced with trees so as not to be damaged during transshipment. Compared to packaging in a frame, transshipment is not required, so this can be done simply by curing and sealing.Thus, simplification of packaging materials greatly reduces industrial waste. Is also achieved.

When the construction of the building progresses and the slope S for running the vehicle is used up, as shown in FIG.
The small slabs 8a to 8d constituting the slope S are sequentially lifted from the upper floor to a predetermined opening portion 12, and are raised around the opening portion 12 to form a steel frame (column steel frame 4) for column and beam construction.
5) and the small slab 8a
Concrete is poured into the space around 8d to complete the floor slab 8.

At this time, first, the handrail for safety measures, the net, and the metal slope body 23 are removed.
Since the bridge plate 22 and the protection plate 24 are removed, and the first and third small slabs 8a and 8c are constructed mainly with the small beam steel members 6, the suspension stiffness may be weak. If necessary, the traverser frame 25 is temporarily connected over the small beam steel frame 6 as shown in FIGS.

Then, the small slabs 8a and 8c are hung on the predetermined openings 12 by hooking the crane hooks 26 on the hook plates 27 connected to the frame 25, and as shown in FIGS. 5 and 7, respectively. Small beam steel frame 6
Is connected to the girder steel frame 5 via the gusset plate 18.

As for the second and fourth small slabs 8b and 8d, crane hooks are hooked on hook plates (not shown) connected to the left and right small beam steel frames 6, and the small slabs 8b and 8d are fixed to predetermined positions. And the ends of the girder steel frames 5 are connected to the column steel frames 4, respectively.

Then, as shown in FIG. 7, taking the third small slab 8c as an example, a concrete driving form 27 is provided in the space around each of the small slabs 8a to 8d, and slab reinforcement (not shown) is constructed. The floor slab 8 is constructed by casting concrete and closing the opening 12 for passing the vehicle.

That is, the vehicle running slope S suitable for lifting the frame members and the materials and equipment is constructed by using a part of the floor slab 8 itself. The floor slab 8 is constructed by directly lifting the small slabs 8a to 8d of the part, and carrying in the heavy temporary material such as a case in which a heavy temporary material such as a steel material or a covered steel plate constitutes a slope for running the vehicle. There is no need to dismantle and dismantle, and the tedious work to finally close the opening for running the vehicle is also simplified, and coupled with the reduction in lifting equipment, the construction cost and construction period are significantly reduced. Becomes possible.

In the above-mentioned embodiment, the small slabs 8a to 8d constituting a part of the floor slab 8 are inclined toward the lower floor to form the slope S for running the vehicle, and the slope S is unnecessary. At this point, the small slabs 8a to 8d are lifted to construct the floor slab 8, but the present invention is not limited to this procedure.

That is, for the uppermost floor slab 8, it is necessary to close the vehicle running opening 12 formed in the uppermost floor slab 8, but the small slabs 8a to 8d are inclined toward the upper floor. It is also possible to configure the slope S and take a procedure of lowering the small slabs 8a to 8d and constructing the floor slab 8 when the slope S becomes unnecessary.

The small slabs 8a to 8d are manufactured at a construction site. The small slabs 8a to 8d are manufactured in advance near a construction site or at a factory, and the small slabs 8a to 8d are transported to the construction site to be sloped. The configuration of S may be taken.

[0034]

As described above, according to the method for constructing a floor slab of a multi-layer building according to the present invention, a slope for vehicle traveling is constituted by utilizing a part of the floor slab, thereby mounting the vehicle on a transport vehicle. It is possible to carry the cargo to an arbitrary place on a predetermined floor in a short time without reloading the cargo, thereby making it possible to reduce the unloading space required on the first floor. In addition, the reduction of other lifting equipment is achieved, thereby reducing the dangerous work of disassembly and assembly and the temporary opening for lifting, thereby reducing the cost of safety measures.

When the vehicle running slope has been used up, the small slab constituting the slope is positioned at a predetermined opening, and concrete is poured into a space around the small slab to thereby obtain a predetermined slope. Since a floor slab is constructed, there are problems such as the case where a slope is composed of heavy temporary materials such as steel materials and covered steel plates. It takes a lot of time and effort to dismantle and remove, and after removing the slope with heavy temporary materials, many openings such as carrying in construction materials to close the openings, arranging reinforcement and placing concrete. It is possible to avoid problems such as the necessity of closing work, which is very advantageous in terms of both construction cost and construction period.

[Brief description of the drawings]

FIG. 1 is a schematic vertical sectional side view of a building under construction provided with a vehicle running slope.

FIG. 2 is a layout plan view of a column steel frame, a large beam steel frame, and a small beam steel frame on a certain floor.

FIG. 3 is a plan view of a vehicle running slope viewed through an opening;

FIG. 4 is a schematic side view showing a erected state of a slope.

FIG. 5 is an explanatory view of erection of a first small slab.

FIG. 6 is an explanatory view of erection of a third small slab.

FIG. 7 is a cross-sectional view showing a connection state of a third small slab to a predetermined opening.

FIG. 8 is a schematic longitudinal sectional side view of a building showing a state in which a floor slab is being completed with a used slope positioned from an upper floor side to an opening.

[Explanation of symbols]

8: Floor slab, 8a to 8d: Small slab, 8e: Remaining floor slab, 12: Opening, 27: Concrete driving form, S: Slope for running the vehicle.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroshi Hamori 4-1-1-13 Honcho, Chuo-ku, Osaka City Inside Takenaka Corporation, Osaka Main Store (72) Kosaku Chiba 4-1-1, Honcho, Chuo-ku, Osaka-shi No. 13 Inside Takenaka Corporation, Osaka Main Store (72) Inventor Tatsumi Ifuku 4-1-1, Honmachi, Chuo-ku, Osaka City Inside Takenaka Corporation, Osaka Main Store (72) Inventor Ken Yamanaka, Honmachi, Chuo-ku, Osaka 4-1-1-13 Takenaka Corporation Osaka Main Store (72) Inventor Yoshihiko Kubo 4-1-1-13 Honmachi Chuo-ku Osaka-shi Takenaka Corporation Osaka Main Store (58) Field surveyed (Int.Cl . ^7, DB name) E04G 21/14

Claims (2)

(57) [Claims] Claims: 1. A small slab constituting a part of a floor slab,
The small slab is provided separately from the remaining floor slab so that an opening for vehicle passage is formed at the construction location of the small slab, and is provided obliquely over the upper and lower openings to form a slope for vehicle traveling, When it is no longer necessary, replace the small slabs constituting this slope with structural steel around the predetermined opening and connect them, and then cast concrete in the space around the small slab to complete the floor slab. Characterized by the floor slab construction method of multi-story buildings. 2. A steel beam for a small slab is obliquely attached to a predetermined portion of the structural steel frame, a concrete driving form is provided on the beam steel, and reinforcement and concrete are placed in the form. The floor slab construction method of a multilayer building according to claim 1, wherein the small slab is manufactured.