JP3060333B2 - Construction method of building frame - 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 building frame such as a reinforced concrete high-rise building.

[0002]

2. Description of the Related Art Conventionally, in order to construct a skeleton of a reinforced concrete building, a rebar is assembled, a formwork is assembled,
Finally, the procedure of placing concrete is adopted. In this method, rebar assembling, formwork assembling, and concrete casting are a series of continuous operations, and the labor and time required for removing the molds and the like are inevitably required, further reducing labor and shortening time. Can not. Further, in the method of constructing a beam or a floor slab at a predetermined location for each floor, a large amount of support is required to construct the beam or the floor slab. A small transport is required to convert this large amount of shoring work to the upper floor, but the beams and floor slabs that have already been constructed shield the upper surface and must be transported around by detour. Furthermore, much labor and time are required. Therefore, in recent years, a so-called lift slab method has been put to practical use. In this lift slab method, only the pillars are built in advance, precast concrete floor slabs are manufactured on the ground, they are stacked for the number of floors, and they are lifted and fixed on the floor position on each floor. Is how to build.

[0003]

However, in this lift slab method, since the pillars are constructed in advance, work at high places is increased, which is unstable and dangerous, and requires much labor. . In particular, the construction of pillars requires a lot of labor and time because a formwork is installed, reinforcement is provided, and concrete is cast. Then, the structural stability of the column against horizontal force becomes a problem. In addition, the work of suspending and installing each material such as prefabricated floor slabs and formwork and reinforcing bars required for construction of columns to a predetermined floor is usually performed.
Since the work is carried out using lifting equipment such as tower cranes, the labor involved in transporting these materials is excessive, easily affected by wind, making work difficult or causing damage to the materials. In addition, the safety of the work of installing the lifting equipment at a high place becomes a problem.

[0004] The present invention effectively solves the above-mentioned problems in the conventional lift slab method, reduces work at a high place, saves labor and ensures safety, improves the stability of columns, and conveys material. It is an object of the present invention to provide a construction method of a building skeleton which can reduce the labor required for the construction and improve the safety of material transport work.

[0005]

According to the method for constructing a building frame of the present invention, after a column is constructed, a floor slab of an immediately upper floor is assembled at a column base of the column, and the floor slab is raised along the column. It is a construction method of a building skeleton in which pillars and floors are sequentially constructed for each floor by repeatedly repeating an operation of fixing the pillars to the column caps, and the constructed columns are raised by taking a reaction force from the columns. Install a work stage, assemble the floor slab below the work stage, connect it to the work stage, lift the work slab by raising the work stage, and move it to a fixed position. It is characterized by leading.

[0006]

According to the construction method of the building frame of the present invention, the column on the upper floor is sequentially constructed on the column on which the work stage is attached, and the building frame is raised, so that the high columns are installed at once. It is not necessary to reduce the labor, improve the work safety, and improve the structural stability against the horizontal force of the column. Then, the work stage can be used as a scaffold when the pillar on the immediately upper floor is constructed, and the work stage can be used as a roof when assembling the floor. Since these columns and floors are sequentially constructed for each floor, lifting equipment such as a tower crane can be unnecessary. In addition, since the work stage rises by taking a reaction force from the pillar, the floor slab can be easily raised.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of a method for constructing a building frame according to the present invention will be described with reference to FIGS. FIG.
The construction frame is being constructed by the construction method according to the present invention. 1 is a pillar, 2 is a floor, and 3 is a work stage. The work stage 3 is installed on the column capital of the fixed floor 2 and is vertically attached to the constructed column 1. The work stage 3 includes upper and lower frames 4.5 opposing each other up and down, moving means 6 attached to the upper and lower frames 4.5, and upper and lower frames for lifting materials 7a by wires 7b. Hoist 7 ・
8 is provided. The upper frame 4 and the lower frame 5
Each is temporarily fixed to the column 1 by the temporary receiving member 9.

The work stage 3 is shown in FIGS.
As shown in (b), the temporary receiving member 9 is attached to the column base of the first floor column 1a, the lower frame 5 is placed on the temporary receiving member 9, and the lower frame 5 is temporarily attached to the first floor column 1a. Fix it.
Then, air is introduced into the sealed space 11 surrounded by the upper and lower frames 4 and 5 and the flexible film 10 by, for example, a compressor. Figure 2 with the introduction of air
As shown in (b), the inside of the sealed space 11 is pressurized,
The sealed space 11 expands, and the upper frame 4 rises along the column 1. At this time, the flexible film 10 is stretched between the upper and lower frames 4.5.

After the upper frame 4 has been raised to a predetermined height, the upper frame 4 is temporarily fixed by a temporary receiving member 9. The temporary receiving member 9 is detachably attached to, for example, the pillar 1a, and the temporary receiving member 9 supports the lower surface of the upper frame 4 so that the upper frame 4
Is prevented from falling. From this state, air is discharged from the sealed space 11 surrounded by the upper and lower frames 4 and 5 and the flexible film 10. Since the upper frame 4 is temporarily fixed first, the lower frame 5 rises along the column 1a with the discharge of air. In this way, as shown in FIG. 5, the raised lower frame 5 is temporarily fixed to the column 1 by the temporary receiving member 9.

Here, the work stage 3 may be made of another material such as an iron plate made of reinforced concrete and having deformation-resistant rigidity. A temporary floor slab that can be dismantled may be used. The outer dimensions of the work stage 3 are designed to be larger than the outer dimensions of the building, and the upper and lower hoists 7 used for attaching the outer wall courtesy around the outer periphery of the work stage 3 and supplying the material of each floor are provided.・ 8 are provided. The upper hoist 7 is arranged so that the material 7a reaches above the upper frame 4.

On the other hand, as shown in FIG. 2, a moving means 6 attached to the upper and lower frames 4.5 is movable between the upper and lower frames 4.5 as shown in FIG.
For example, the upper and lower frames 4 and 5 are connected in an airtight state by a flexible film 10 connected to the entire periphery of the upper and lower frames 4 and 5. The flexible film 10 is made of rubber, soft plastic, or the like, and has a ring shape having a height substantially equal to the height of one building. The joining between the upper and lower frames 4.5 and the flexible membrane 10 is performed by joining a channel to the peripheral edge of the upper and lower frames 4.5.
An airbag is attached to the end of the flexible film 10, and the airbag is fitted into a channel.
At this time, the flexible film 10 is placed on the ground in a bent state without maintaining a constant shape.

On the other hand, the floor slab 2a is connected to the lower frame 5 by a connecting member 13 made of, for example, a chain. Here, the floor slab 2a refers to a concrete structure formed into a plate shape by, for example, providing beams and casting concrete, and is manufactured by a method such as casting in place.
The floor slab 2a is formed with a hole through which the column 1 can be penetrated.

The upper frame 4 of the work stage 3
On top of this, a roof for protecting this building from an open-air environment such as rainfall during the construction period may be temporarily constructed. By providing this roof, even if bad weather is encountered during the construction period, work can be performed, process planning can be advanced,
In particular, it is possible to continuously perform a process such as placing concrete.

A method of constructing such a building frame will be described with reference to FIGS. In the construction method of this building frame, as shown in FIG. 3, a plurality of pillars 1a on the first floor are constructed perpendicularly to the ground 14. As shown in FIG. 4, a work stage 3 is attached to the pillars of the pillars 1a on the first floor. As shown in FIG. 5, the work stage 3 is raised to the column cap of the column 1a on the first floor.

Next, as shown in FIG. 6, the material is pulled up by the lower hoist 8 on the column base of the column 1a on the first floor to form the second floor slab 2a which can be moved up and down. Meanwhile, pillar 1 on the first floor
The material 7a is pulled up by the wire 7b with the upper hoist 7 of the work stage 3 temporarily fixed above the upper part a of the work stage 3, and as shown in FIG. On the first floor of the first floor
Construct b.

Then, as shown in FIG. 8, the second floor slab 2a formed on the column base of the first floor column 1a is connected to the lower frame 5 of the work stage 3 as shown in FIG.
Connected by 3. The second floor slab 2a connected to the work stage 3 is raised along the first floor column 1a by raising the work stage 3 along the second floor column 1b. As shown in FIG. 9, the raised floor slab 2a is
It is fixed, for example, by welding above the first floor pillar 1a. Then, as shown in FIG. 10, the connecting member 13 is removed from the work stage 3 and the fixed floor slab 2a, and the connection state between the work stage 3 and the floor slab 2a is released. From the above,
The construction of the pillar 1b on the second floor and the floor 2 on the second floor is completed.

Then, above the second floor pillar 1b, FIG.
As shown in FIG. 1, while forming the floor slab 2b of the third floor,
The third floor pillar 1c is constructed, and the work stage 3 and the third floor floor slab 2b are connected. Then, while raising the work stage 3, the floor slab 2b on the third floor is raised, and the pillar 1 on the second floor is raised.
By fixing the floor slab 2b on the third floor above b and removing the connecting member 13, the pillar 1c on the third floor and the floor 2 on the third floor are formed. A high-rise building is formed by sequentially repeating the steps below.

In such a method of constructing a building frame, the upper stage slab 2 is formed by the work stage 3, and the column 1 on the upper floor is fixed on the column 1 to which the work stage 3 is fixed. The work stage 3 is raised along the pillars 1, and the pillars 1 are further constructed sequentially, so that the building frame is raised. For this reason, the work stage 3 can be used as a scaffold when the pillar 1 on the immediately upper floor is constructed, and it is not necessary to install a high pillar 1 in advance, thereby reducing labor and improving work safety. Since the pillar 1 for one floor is constructed, the structural stability against the horizontal force of the pillar 1 can be improved. Further, since the material 7a is transported by the upper and lower hoists 7, 8 attached to the work stage 3, the lifting equipment such as a tower crane is not used, so that the labor required for transporting the material 7a is reduced. It is possible to improve the safety of the carrying work of 7a, eliminate the work of installing the lifting equipment at a high place, and improve the safety of the work. And, when forming the floor slab 2,
The work stage 3 can be used as a roof. Furthermore, since the pillars 1 on the upper floor are formed on the work stage 3 and the floor slabs 2 are formed repeatedly, the rebar assembly, the formwork assembly, and the concrete casting can be performed at the same time, and the number of supports is reduced. Thus, the labor and time required for the operation can be reduced, and the stability of the operation can be improved. Then, the work stage 3 is raised by the moving means 6, so that the floor slab 2 can be easily raised, and the workability can be further improved.

In the first embodiment, the flexible film 11 and the compressor are used as the moving means 6 of the work stage 3 as shown in FIG. 2, but as shown in FIG. The moving means 6, for example, a vertically extensible jack 20 may be attached to the lower frames 4 and 5. In this case, the upper frame 4 is raised along the column 1 by extending the arm portion 21 of the jack 20, and the raised upper frame 4 is temporarily fixed to the column 1 by the temporary receiving member 9. By contracting the part 21, the work stage 3 is raised.

[0020]

As is apparent from the above description, according to the construction method of the building frame of the present invention, the floor for the floor directly above the floor is formed by the work stage, and the column on which the work stage is fixed is formed. A pillar on the upper floor is constructed above, and a work stage is raised on the pillar, and the pillars are further constructed one after another, so that the building frame is raised. This eliminates the need to install tall columns in advance, reducing labor and improving work safety, as well as building one-story columns, improving structural stability against horizontal forces. Can be done. In addition, since materials are transported by the work stage, lifting equipment such as a tower crane is not used, so the labor required for material transportation is reduced, the safety of material transportation work is improved, and lifting equipment is installed. Eliminating the work of setting up at high places can improve the safety of work. In forming the floor slab, the work stage can be used as a roof. Furthermore, since columns are formed on the work stage and floor slabs are repeatedly formed, rebar assembling, formwork assembling, and concrete placing can be performed simultaneously, thereby reducing the number of shoring works. Work and work time can be reduced, and work stability can be improved. Then, since the work stage is raised by the moving means, it is possible to easily raise the floor slab and to further improve workability.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of a construction method of a building skeleton according to the present invention.

FIG. 2 is a side view showing a work stage raising process;
(A) is a side view showing a state before the expansion and contraction of the work stage of FIG. 1, (B) is a side view showing an expanded state of the work stage of FIG. 1, and (C) is a work stage of FIG. It is a side view which shows the state after shrinking.

FIG. 3 is a side view showing the first-floor pillar of FIG. 1 constructed.

FIG. 4 is a side view in which a work stage is attached to a first floor pillar of FIG. 3;

FIG. 5 is a side view after the work stage of FIG. 4 is raised.

FIG. 6 is a side view in which a moving floor is formed below the work stage of FIG. 5;

FIG. 7 is a side view when a second-floor pillar is constructed on the first-floor pillar in FIG. 6;

8 is a side view in which a moving floor is connected to the work stage of FIG. 7;

9 is a side view after the work stage and the movable floor in FIG. 8 have been raised.

FIG. 10 is a side view when the raised moving floor of FIG. 9 is fixed.

11 is a side view in which the moving floor of FIG. 10 is formed, pillars are constructed, and the working stage and the moving floor are connected.

FIGS. 12A and 12B show a second embodiment of the method of constructing a building frame according to the present invention, wherein FIG. 12A is a side view showing a state before the work stage is raised, and FIG. (C) is a side view showing a state after the lower frame is moved.

[Explanation of symbols]

 Reference Signs List 1 pillar 1a pillar on first floor 1b pillar on second floor 1c pillar on third floor 2 floor 2a floor slab on second floor 2b floor slab on third floor 3 work stage 6 transportation means

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hiroshi Kurita 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (56) References JP-A-3-103572 (JP, A) JP-A Heisei 3-81434 (JP, A) JP-A-3-59266 (JP, A) JP-A-2-70845 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04B 1/35 E04G 21/14

Claims (1)

(57) [Claims] After the column is constructed, by repeating the operation of assembling the floor slab directly above the column at the column base of the column and raising the floor slab along the column and fixing it to the column capital, A method for constructing a building frame in which pillars and floors are sequentially constructed for each floor, wherein a work stage that rises by taking a reaction force from the pillar is installed on the constructed pillar, and a work stage is provided below the work stage. The method of constructing a building frame according to any one of claims 1 to 3, wherein the floor slab is assembled, connected to a work stage, and the work stage is lifted to lift the floor slab to a fixed position.