JP4172564B2 - How to build tower structures - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for constructing a tower structure such as a chimney.
[0002]
[Problems to be solved by the invention]
As a method for constructing a tower-like structure such as a chimney, a jump form method and a slip form method are known. However, the conventional method has the following problems.
First, when construction of the uppermost part of the frame is completed, the external scaffold for construction will be removed. Therefore, a finishing stage and a repair stage must be newly installed around the outside of the housing.
[0003]
Second, a top stage is installed at the top of the chassis during the chassis construction work. On the other hand, the internal space of the frame is used to hang unitized reinforcing bars, precast outer wall panels, and the like using a lifting machine installed on the top stage. However, the mounting position of such unit rebars and precast plates and the top stage framework (main frame) may overlap vertically. In other words, the frame of the top stage often interferes with the unit rebar and precast plate (precisely the suspension wire) that is suspended. Under such circumstances, of course, a great deal of labor is required for construction.
[0004]
Therefore, the problem to be solved by the present invention is to provide a method for constructing a tower-like structure that does not require a new finishing stage or a repairing stage to be installed on the outer periphery after the construction of the housing is completed. It is. Moreover, the problem to be solved by the present invention is to provide a method for constructing a tower-like structure that can suspend a unit rebar, a precast plate, or the like at a predetermined position without interfering with the framework of the top stage. .
[0005]
[Means for Solving the Problems]
This challenge is
For the tower-like structure in the middle of construction,
An outer stage portion that is around the housing and can be moved up and down with respect to the housing, and a top stage portion that is mounted on an upper end of the outer stage portion and is rotatable with respect to the outer stage portion,
Installed a work stage device comprising an internal stage part suspended from the top stage part so as not to rotate following the rotation of the top stage part inside the housing.
Thereafter, using the work stage device, the remaining part of the housing is constructed, and after the construction of the housing is completed, the top stage portion and the internal stage portion are removed, and the external stage portion is The problem is solved by a method for constructing a tower-like structure characterized by performing the finishing operation and / or repairing operation of the housing while being lowered.
[0006]
That is, in the method for constructing a tower structure according to the present invention, after completion of the construction of the tower structure, the outer stage section is lowered and the outer stage section is used as it is to finish and / or repair the chassis. Work to be done. Therefore, it is not necessary to newly install a finishing stage or a repairing stage around the outer periphery of the housing after the construction of the housing is completed, and a significant labor saving can be achieved as compared with the conventional construction method.
[0007]
Further, in the method for constructing a tower structure according to the present invention, as a work stage device installed in the tower of the tower structure, the top stage part can be rotated with respect to the external stage part, and the inner stage part is provided with the top stage part. What was comprised so that it might not rotate following the rotation of a stage part was used. Therefore, when suspending a unit rebar, a precast plate, or the like, the top stage portion can be appropriately rotated so that the frame does not interfere with the unit rebar, the precast plate (precisely a suspension wire), or the like. In other words, the unit rebar, the precast plate, etc. can be suspended at a predetermined position without interfering with the frame of the top stage portion.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 is a schematic cross-sectional view showing a state where the work stage apparatus is installed, FIG. 2 is a schematic plan view showing the state where the work stage apparatus is also installed, and FIG. 3 is an enlarged cross-sectional view of an internal stage portion holding portion in the work stage apparatus. FIG. 4 is a schematic cross-sectional view showing a state immediately before the tower of the tower-like structure is completed, and FIG. 5 is a schematic cross-sectional view showing a state where the top stage part and the internal stage part are removed.
[0009]
The tower-like structure construction method according to the present embodiment (hereinafter referred to as the present construction method) is performed using a work stage apparatus having a special structure. Therefore, the structure of this work stage device that plays an important role in the implementation of this construction method will be described in detail.
As can be seen from FIG. 1 and FIG. 2, the work stage device is installed on the frame B of the tower structure of the reinforced concrete structure that is being constructed, that is, constructed to a certain height. However, to be precise, this work stage device is supported by a column of a lifting jack described later.
[0010]
This work stage apparatus includes an external stage unit 1, a top stage unit 2, and an internal stage unit 3 as basic components.
Among these, the external stage part 1 is provided in the outer periphery of the housing (space which the housing to be constructed will occupy) B so as to surround it. The external stage unit 1 is a three-stage type. That is, the external stage portion 1 generally includes a vertical portion 1a and a horizontal portion 1b, but in the present embodiment, the horizontal portion 1b is provided in three upper and lower stages.
[0011]
The external stage unit 1 includes a peripheral curing net 4 and an annular horizontal curing frame 5. In addition, a lifting jack 6 is attached to the lowermost horizontal portion 1b of the external stage portion 1. Further, a support column 7 extending vertically from the ground passes through the lifting jack 6. And the raising / lowering jack 6 and the support | pillar 7 support the external stage part 1 jointly, and raise / lower it with respect to the housing | casing B as needed. In the present embodiment, a total of four elevating means composed of the elevating jack 6 and the column 7 are arranged at intervals of 90 °. However, the struts 7 are appropriately added as the construction of the housing B progresses. Further, a retaining material (not shown) for preventing buckling of the column 7 is disposed between the already constructed portion of the housing B and the column 7 at a predetermined interval.
[0012]
On the other hand, the top stage portion 2 is placed on the upper end of the vertical portion 1a of the external stage portion 1 so as to cover the housing B in a plane. More specifically, the upper end side of the vertical portion 1a of the external stage portion 1 is a ring-shaped rail, and this rail is engaged with a roller (not shown) provided on the lower surface side of the top stage portion 2. (Point P in FIG. 2). Further, a driving means (not shown) is connected to the roller, and as a result, the top stage portion 2 can rotate with respect to the external stage portion 1 (after the rotation is completed, the roller is attached to the rail). Fixed against).
[0013]
Note that the top stage portion 2 used here has a substantially cross-shaped framework as a main structure, and the roller connected to the driving means is provided at the end of the framework. Further, a lifting machine 8 is pivotably installed at the center of the substantially cross-shaped frame. Further, the top stage portion 2 may be provided with a roof for adapting to all weather conditions (however, in this case, the roof is provided with a hatch for taking in materials). Incidentally, what is shown in FIG. 1 is a situation where the lifting machine 8 lifts the unit rebar M.
[0014]
The internal stage portion 3 that constitutes the work stage apparatus together with the external stage portion 1 and the top stage portion 2 is provided inside a housing B (a space that the constructed housing will occupy). The internal stage unit 3 is also a three-stage type. That is, the internal stage portion 3 is generally composed of a vertical portion 3a and a horizontal portion 3b, but in the present embodiment, the horizontal portion 3b is provided in three upper and lower stages. The internal stage unit 3 is provided with a hoist crane 9, a concrete distributor 10, and the like.
[0015]
More specifically, the internal stage unit 3 is suspended from the top stage unit 2 so as not to rotate following the rotation of the top stage unit 2. More specifically, as can be seen from FIG. 3 which shows an enlarged holding portion (point Q in FIG. 2) of the internal stage portion 3, a ring-shaped rail 11 is provided on the lower surface of the top stage portion 2. . On the other hand, a roller 12 is attached to the upper end of the vertical portion 3 a of the internal stage portion 3, and this roller 12 is housed in the groove 11 a of the rail 11. As a result, although the internal stage unit 3 moves up and down together with the external stage unit 1, it does not rotate with the top stage unit 2 (the roller 12 is fixed to the rail 11 after completion of the rotation).
[0016]
In order to prevent the internal stage unit 3 from rotating together with the top stage unit 2 when the top stage unit 2 is rotated, a predetermined interval between the already constructed portion of the housing B and the internal stage unit 3 is provided. Retaining materials 13 are arranged at intervals. However, you may make it support the internal stage part 3 by the raising / lowering means different from the raising / lowering means which supports the said external stage part 1. FIG.
[0017]
In addition, the external stage portion 1 and the internal stage portion 3 are used to support the outer mold frame 14a and the inner mold frame 14b facing each other. In particular, the outer mold 14a is supported by the second horizontal portion 1b of the external stage portion 1 so that the horizontal position can be adjusted (used when the cross-sectional dimension of the housing B changes). On the other hand, the inner mold 14 b is also supported by the second horizontal portion 3 b of the inner stage portion 3. Between the outer mold 14a and the inner mold 14b thus installed, a unit rebar M suspended by the lifting machine 8 is disposed. Then, concrete is placed using the concrete distributor 10. By the way, as the outer mold 14a and the inner mold 14b, here, steel plates were used to enable diversion.
[0018]
A lifting device 15 for personnel is installed below the internal stage unit 3. In addition, an elevating staircase 3 c is provided below the internal stage portion 3. Personnel who perform work on the work stage device board the work stage device from the lift device 15 via the lift staircase 3c.
Now, the construction of the tower-like structure using the work stage device having the above-described configuration is performed as follows.
[0019]
That is, after the work stage device is installed as described above for the housing B constructed to a certain height, the remaining portion of the housing B is constructed using the work stage device. More specifically, for example, in the lowermost horizontal portions 1b and 3b of the outer stage portion 1 and the inner stage portion 3, the molds 14a and 14b are assembled. On the other hand, in the middle (second stage) horizontal parts 1b and 3b, before and after the work in the lowermost stage, rebar assembly (bar arrangement) and concrete placement into the formwork are carried out. Further, on the scaffold 5a integrated with the horizontal curing frame 5, a primary finishing operation and a curing operation are newly performed on the outer peripheral portion of the newly constructed frame.
[0020]
Next, when the work in each stage is completed, especially when the placed concrete is hardened, the work stage apparatus is raised by one stage. That is, the lowermost horizontal portions 1b and 3b are positioned at the height where the middle horizontal portions 1b and 3b existed, or the middle horizontal portions 1b and 3b are the uppermost horizontal portions 1b and 3b. The work stage device is raised so that it is positioned at the height where the head was. In this case, needless to say, the lifting jack 6 supported by the support column 7 is used.
[0021]
Now, when the work stage device is raised by one stage in this way, the construction work of the chassis B is carried out in the same manner as before. In addition, when suspending the unit rebar M and the precast plate (not shown), if necessary, the top stage unit 2 is appropriately rotated to perform the operation.
Thereafter, the construction work for the remaining part of the chassis B may be repeated while raising the work stage device step by step. Incidentally, the state immediately before the construction of the chassis B is completed is as shown in FIG.
[0022]
Next, after the building of the tower-shaped structure frame B is completed, first, the top stage unit 2 (and the lifting machine 8) and the internal stage unit 3 are disassembled and removed (see FIG. 5).
When this is completed, the finishing operation and the repairing operation of the outer peripheral surface of the housing B are subsequently performed while the remaining external stage portion 1 is lowered stepwise. Also in this case, for the lowering of the external stage unit 1, an elevating means comprising an elevating jack 6 and a column 7 is used.
[0023]
If the external stage unit 1 is lowered to the ground, it is dismantled and removed. Thereby, the building construction of the tower-like structure is almost completed.
As described above, in the present construction method, after the completion of the building B of the tower-like structure, the external stage unit 1 is lowered and the external stage unit 1 is used as it is to finish and repair the frame B. To do. Therefore, after completion of the construction of the chassis B, it is not necessary to newly install a finishing stage or a repairing stage around the outer periphery of the housing B, so that significant labor saving can be achieved as compared with the conventional construction method.
[0024]
Further, in this construction method, as the work stage device installed in the tower B of the tower-like structure, the top stage part 2 can be rotated with respect to the external stage part 1, and the internal stage part 3 is the top stage part 2. What was comprised so that it might not rotate following the rotation of this was used. Therefore, when suspending a unit rebar, a precast plate, etc., the top stage part 2 can be appropriately rotated so that the framework does not interfere with the unit rebar, the precast plate (especially its suspension wire), or the like. That is, it is possible to suspend a unit rebar, a precast plate, or the like at a predetermined position without interfering with the framework of the top stage portion 2.
[0025]
In the present embodiment, a case where a tower-like structure having a circular cross section, that is, a chimney is constructed is described as an example. However, the present invention can be applied to the construction of a tower-like structure having a rectangular cross section or an irregular cross section, and the construction object is not limited to that of the above embodiment.
[0026]
【The invention's effect】
According to the method for constructing a tower-like structure of the present invention, after completion of construction of the tower-like structure housing, a finishing stage and a repair stage need not be newly installed around the outer periphery thereof. Moreover, a unit rebar, a precast plate, etc. can be suspended in a predetermined position without interfering with the framework of the top stage part.
[Brief description of the drawings]
1 is a schematic cross-sectional view showing a state in which a work stage device is installed. FIG. 2 is a schematic plan view showing a state in which a work stage device is installed. FIG. 3 is an enlarged cross-sectional view of an internal stage holding portion in the work stage device. FIG. 4 is a schematic cross-sectional view showing a state immediately before the tower structure is completed. FIG. 5 is a schematic cross-sectional view showing a state in which the top stage part and the internal stage part are removed.
B Tower Structure 1 External Stage 1a Vertical Stage 1b External Stage Horizontal 2 External Stage 2 Top Stage 3 Internal Stage 3a Vertical 3b Internal Stage 3b Horizontal Stage 4 External Curing Net 5 Horizontal Curing Frame 6 Elevating Jack 7 Strut 8 Lifting Machine 9 Hoist Crane 10 Concrete Distributor 11 Rail 12 Roller 13 Retaining Material 14a Outer Form 14b Inner Form 15 Lifting Device for Persons M Unit Rebar

Claims (1)

For the tower-like structure in the middle of construction,
(A) an external stage portion around the housing and capable of moving up and down with respect to the housing;
(B) a top stage unit mounted on the upper end of the external stage unit and rotatable with respect to the external stage unit;
(C) Install a work stage device comprising an internal stage part suspended from the top stage part so as not to rotate following the rotation of the top stage part inside the housing,
Thereafter, using the work stage device, the remaining part of the housing is constructed, and after the construction of the housing is completed, the top stage portion and the internal stage portion are removed, and the external stage portion is A method for constructing a tower-like structure, comprising performing a finishing operation and / or a repair operation of the casing while being lowered.

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