JPH04222733A - Construction of building with suspended floor - Google Patents

Abstract

PURPOSE:To rationalize the building construction, by constructing a building suspending and supporting a multi-layer floors by the uppermost structure from the uppermost story to lower stories in turn around the core part, after the core part and the uppermost structure has completely constructed. CONSTITUTION:The uppermost structure 3 is constructed on the core part 1 and necessary numbers of center hole type lift up jack 9 are placed thereon. Next, a suspending columns 4 having the length of the full height to the highest level are hung from the structure 3. Next, after the floor 2m of the uppermost story is assembled on the lowermost story and it is attached to the lower end of step rod 10 of a jack 9, the jack 9 is lifted up by one story height to joint the next floor of lower story. And this process is repeated to construct the floors of whole stories. And then the floor 2m is jointed with the structure 3 and further the floors of respective stories are connected to the core part 1 and the columns 4. In this way, it becomes unnecessary to install temporary columns under the suspending columns, to arrange piles or the like, to carry out removal works, and to reinforce the suspending columns.

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 building with a suspended floor structure.

0002

[Prior Art] For example, as shown in FIG. 15(d),
It has a core part 1 in the center that can handle seismic force and wind pressure, and multi-layer floors 2a, 2b, 2c...2n arranged around the core part 1 are placed in a state in which they protrude laterally above the core part 1. Buildings with suspended floor structures, suspended and supported by top structures 3, such as roof trusses, may already be known. This building has floors 2a, 2b, 2c on the outer periphery of the core part 1...
2n is suspended from the uppermost structure 3 via the hanging column 4. Therefore, the lower part of the hanging column 4, that is, the hanging floor 2a on the lowest floor or the column on the basement floor directly below it (supporting the vertical load) There is an advantage in that a wide space can be formed around the outer periphery of the core part 1 by eliminating the pillars used for the purpose. On the other hand, because it is a suspended floor structure, there would be problems if it were constructed using the conventional construction method (laminated construction method), which is constructed by stacking the floors one by one from the lower floors to the upper floors, just like in a normal building. many.

That is, when constructing a building with a suspended floor structure using conventional construction methods, as shown in FIGS. , even if the core part 1 and the suspended floors 2a, 2b, 2c are built up from bottom to top, or alternatively,
As shown by the imaginary line in FIG. 15(b), after the core part 1 and the top structure 3 are constructed in advance, the suspended floor 2a,
Even if only 2b and 2c are constructed by stacking them from the bottom to the top, there are temporary columns 5 to support the vertical load during construction and the load of the temporary columns 5 at the lower position of the hanging columns 4. It is necessary to install temporary foundation piles 6 to convey the information to the ground.

[0004] In addition, in the case of hanging columns 4, contrary to ordinary columns, the higher the load is applied to the upper floors, and the higher the load is on the lower floors.
Since the load is smaller, the wall thickness of the steel frame for columns can be made thinner for lower floors.However, when constructed using conventional construction methods, as mentioned above, during construction bears the vertical load (compressive force), so even on the lower floor,
Reinforcing measures such as increasing the thickness of the steel frames for the columns are required, which impedes the structural characteristics of the suspended floor structure.

Moreover, as shown in FIGS. 15(c) and 15(d), in the final stage when all the floors 2a, 2b, 2c...2n are constructed and connected to the top structure 3, temporary columns 5 are installed. Since it is removed, a tensile force will be applied to the hanging pillars 4, which were previously under compressive force, and the floors 2a, 2b, 2c...2n will be deformed due to the rapid elongation of the hanging pillars 4, and will be restrained. It is inevitable that cracks will occur in the concrete that has been removed. In addition, 7 in the figure is a pillar of the core part 1, and 8 is a foundation pile directly under the pillar 7 of the core part 1.

[0006]

[Problems to be Solved by the Invention] The present invention has been made with the above points in mind, and its purpose is to provide a construction method that can take advantage of the structural characteristics of a suspended floor structure. It's about doing.

[0007]

[Means for Solving the Problems] The technical means taken by the present invention to solve the above problems are as follows. That is, a feature of the present invention is a suspended floor in which a multilayer floor arranged around a core part is suspended and supported by a top structure provided above the core part in a state that juts out laterally. In constructing a structural building, after constructing a core part and a top structure, multiple floors are built around the core part sequentially from the top floor to the bottom floor and above the top structure. The idea is to construct it while supporting it by suspending it.

[0008] As a concrete construction procedure for constructing a multi-layered floor around the core part, sequentially from the top floor to the bottom floor and suspended and supported by the top structure, As in each example described later, the top floor is constructed at a low position, and the top floor is suspended and supported from the top structure via a lift-up jack installed on the top structure. Then, the floor is raised a predetermined distance using the lift-up jack and the floor on the lower floor is added. After building the entire floor by repeating this process, the floor on the top floor is connected to the top structure, and the floors on each floor are Using a method of connecting the floor to the core part and a stage that can be raised and lowered using the core part as a guide, each floor of each floor can be constructed on the stage, connected to the top structure or core part, and the preceding upper floor. It is possible to adopt the method of adding patches to the floor. Furthermore, in the latter method, the stage is first lowered to a low position to construct the floor, and then the stage is raised to join the floor of the preceding upper floor, and the other method is to raise the stage to a predetermined position in advance. There is a method in which a floor for each floor is constructed on a stage that has been moved, and the stage is lowered a predetermined distance each time it is added to the floor of the preceding upper floor.

[0009]

[Operation] According to the above structure, after constructing the core part and the top structure in advance, the multi-layered floors are suspended from the top floor to the bottom floor in sequence and by the top structure. Since it is constructed while being supported downward, there is no need to install temporary columns or temporary foundation piles below the hanging columns, or to remove the temporary columns at the final stage, and there is no need to reinforce the hanging columns on the lower floor. do not have.

0010

Embodiment FIGS. 1 and 2 show an example of a building with a suspended floor structure constructed by the construction method of the present invention. This building is a regular building in the lower floors and a suspended floor structure in the upper floors. That is, the high-rise part has a core part 1 in the center that can handle earthquake force and wind pressure, and a multilayer floor 2 arranged around the core part 1.
a, 2b, 2c, . 4 is a hanging column, and the core portion 1 has a column 7 that bears a vertical load, but the column located inside the core portion 1 is omitted in the drawing.

The above building was constructed as follows. That is, as shown in FIG. 3(a), after the core part 1 and the top structure 3 are constructed in advance using the conventional construction method of stacking up from the lower floor to the upper floor, the top structure 3 is is a center hole type lift up jack 9
A required number of pillars are installed, and hanging pillars 4 having a length spanning the entire length of the high-rise section are suspended from the top structure 3. A hanging fitting 11 is attached to the lower end of the step rod 10 inserted into the lift-up jack 9.

After that, as shown in FIG. 3(b), by working on the standard floor (the lowest floor of the high-rise section), the floor 2 of the top floor
Attach n to the hanging bracket 11, and lift up the jack 9.
Start lifting up. As a result, the step rod 10 is pulled up, so that the top floor 2n is suspended and supported by the top structure 3 via the lift-up jack 9. Then, use the lift up jack 9 to lift the floor 2n.
Raise the floor by a predetermined distance (one layer), add the floor on the lower floor using PC steel rods, etc., and repeat this process one after another.
As shown in FIG. 4(a), when the entire floor has been lifted up to about 1/2, the number of lift-up jacks 9 is increased, and the floor is lifted up a predetermined distance (one layer) at a time. Repeat adding pieces. The step rod 10, which is pulled up above the lift-up jack 9 during lift-up, is separated from its joint portion and removed.

After constructing all the floors 2a, 2b, 2c, . , the floors 2a, 2b, 2c, . . . 2n of each floor are connected to the hanging columns 4 and the core part 1, and in this state, the lift-up jacks 9 are removed to create a building with a suspended floor structure as shown in FIG.

[0014] In the above embodiment, prior to lifting up the suspended floor, the suspension columns 4 having a length spanning the entire length of the high-rise section are installed.
However, as shown in Figure 5, hanging pillars 4 with the length of one floor are installed in series on the floor of each floor, and the hanging pillars 4 are added at the same time as the floor is added. You can do it like this.

FIGS. 6-8 show another embodiment of the invention. This embodiment uses a stage 12 that is configured to be able to rise and fall using the core part 1 as a guide.
The structure is characterized in that the floors of each floor are constructed on the stage 12 that has been lowered to the stage 12, and the floors are connected to the top structure 3 and the core section 1, and are added to the floors of the preceding upper floors.

This embodiment will be explained in more detail as follows. That is, as shown in FIG. 6, after the core part 1 and the uppermost structure 3 are constructed in advance, a stage 12 that can be raised and lowered using the core part 1 as a guide is provided around the core part 1, and the uppermost part The structure 3 is provided with a winch 13 for raising and lowering the stage 12.

[0017] To construct the top floor 2n on the stage 12 lowered to the standard floor (lowest floor of the high-rise section) and connect this floor 2n and the floor 2n to the top structure 3 and the core part 1. The stage 12, which is equipped with members 14 such as connecting fittings and additional hanging columns, is hoisted up by a winch 13 and placed on the floor 2n.
is connected to the top structure 3 and the core part 1. 13a is a suspension wire of the winch 13.

After that, the stage 12 is lowered to its original position, the lower floor (second floor from the top) is constructed on the stage 12, and then the stage 12 is raised to a predetermined position.
The floor is added and connected to the core part 1, and the same steps are repeated as shown in FIG. 7 to construct a building with a suspended floor structure.

According to this embodiment, since the suspended floor is suspended and supported from the uppermost structure 3 layer by layer starting from the uppermost floor, compared to the above-mentioned construction method using the lift-up jack 9, the core part 1 and the strength of the top structure 3 can be effectively utilized.

FIG. 9 shows another embodiment of the invention. In this embodiment, the floors of each floor are constructed in advance on a stage 12 that has been raised to a predetermined position, and the uppermost structure 3 and the core part 1 are constructed.
The stage 12 is connected to the previous floor, added to the previous floor, etc., and each time the stage 12 is added to the previous floor on the upper floor, the stage 12 is lowered one layer at a time. The other configurations are the same as the embodiments shown in FIGS. 6 to 8.

FIGS. 10 to 13 show another embodiment of the present invention. This embodiment includes, as the stage 12, an upper stage 12a and a lower stage 12b that can be connected to the core part 1, and a hydraulic jack 12c provided between these upper and lower stages 12a and 12b, and has an inchworm-like raising and lowering operation. In other words, when ascending, with the lower stage 12b connected to the core part 1, the hydraulic jack 12c
Lift the upper stage 12a, then lift the upper stage 1
2a is connected to the core part 1, and with the lower stage 12b and the core part 1 disconnected, the hydraulic jack 12c is used to
When the lower lower stage 12b is raised and lowered, a device configured to perform the opposite operation to the above is used to construct the floors of each floor on the stage 12 lowered to the standard floor (lowest floor of the high-rise section). It is characterized in that it connects to the top structure 3 and core part 1 and connects to the floor of the preceding upper floor.

This embodiment will be explained in more detail as follows. That is, as shown in FIGS. 10 and 11, the core part 1 is
Construction work will be carried out on the structure of the building. 16 is a climbing tower crane for steel frame erection. Then, the uppermost structure 3 is constructed on top of the core part 1. When erecting the steel frame of the top structure 3 using the tower crane 16, the stage 12 should be raised to the top floor and used as a scaffold for erecting the steel frame, as shown in FIG. is desirable.

When the construction of the core section 1 and the top structure 3 is completed, the stage 12 is lowered to the standard floor (the lowest floor of the high-rise section), and the top floor 2n is placed on the upper stage 12a.
The stage 12, which is equipped with the floor 2n and members 14 such as connecting fittings and additional hanging columns for connecting the floor 2n to the top structure 3 and the core part 1, is connected to the upper stage 12a and the lower stage 12a. The stage 12b is raised to a predetermined position by an inchworm-like action, and the floor 2n is connected to the uppermost structure 3 and the core part 1.

After that, the stage 12 is lowered to its original position, the lower floor (second floor from the top) is constructed on the stage 12, and then the stage 12 is raised to a predetermined position.
The floors are added and connected to the core part 1, and the same steps are repeated to construct a building with a suspended floor structure.

According to this embodiment, on the stage 12,
Since the suspension wire 13a of the winch 13 is not present, it is easy to load and unload materials from the stage 12, and no opening for passing the suspension wire remains as a result of damaged construction.
It has good workability and shortens the construction period.

FIG. 14 shows another embodiment of the invention. In this embodiment, the stage 12 is raised to a predetermined position in advance.
Then, construct the floor of each floor, connect it to the top structure 3 and core part 1, add to the previous floor, etc., and each time you add to the floor of the previous upper floor, the stage 12 is
It is unique in that it descends layer by layer. The other configurations are the same as the embodiments shown in FIGS. 10 to 13.

[0027]

[Effects of the Invention] The present invention has the above-mentioned structure, and after constructing the core part and the uppermost structure in advance, the multilayer floor is constructed sequentially from the uppermost floor to the lowermost floor. Since the structure is constructed while being suspended and supported by the upper structure, there is no need to install temporary columns or temporary foundation piles below the suspension columns, or to remove the temporary columns at the final stage. There is no need to reinforce it. Therefore, construction that takes advantage of the structural characteristics of a suspended floor structure is possible.

[Brief explanation of the drawing]

FIG. 1 is a schematic longitudinal sectional front view of a building with a suspended floor structure.

FIG. 2 is a schematic plan view of a building with a suspended floor structure.

FIG. 3 is an explanatory diagram of a construction method showing a first embodiment of the present invention.

FIG. 4 is an explanatory diagram of a construction method following the process of FIG. 3;

FIG. 5 is an explanatory diagram of a construction method showing a second embodiment of the present invention.

FIG. 6 is an explanatory diagram of a construction method showing a third embodiment of the present invention.

7 is an explanatory diagram of a construction method following the process of FIG. 6. FIG.

8 is a schematic plan view of main parts in FIG. 6. FIG.

FIG. 9 is an explanatory diagram of a construction method showing a third embodiment of the present invention.

FIG. 10 is an explanatory diagram of a construction method showing a fourth embodiment of the present invention.

11 is a schematic plan view of main parts in FIG. 10. FIG.

FIG. 12 is an explanatory diagram of a construction method following the process of FIG. 10.

FIG. 13 is an explanatory diagram of a construction method following the process of FIG. 12.

FIG. 14 is an explanatory diagram of a construction method showing a fifth embodiment of the present invention.

FIG. 15 is a diagram illustrating problems when constructing a building with a suspended floor structure using conventional construction methods.

[Explanation of symbols]

1 Core part 2a, 2b, 2c...2n floor 3 Top structure

Claims (1)

[Claims] [Claim 1] A multilayer floor arranged around a core part,
In constructing a building with a suspended floor structure that is suspended and supported by a top structure provided above the core part in a state that juts out laterally, after constructing the core part and the top structure, A building with a suspended floor structure, characterized in that a multi-layered floor is built around the core part sequentially from the top floor to the bottom floor while being suspended and supported by the top structure. Construction method.