JP2000120262A - Scaffolding apparatus for constructing reinforced concrete wall body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve efficiency in execution of work. SOLUTION: A scaffolding apparatus 13 has an inside work scaffolding 13a and an outside work scaffolding 13b which are paired and to be installed by fixing at both sides of existing wall bodies 10n-1. The scaffolding 13a is equipped with a base plate 130a, working floors 131a-136a for a plurality of stories starting from the first story and reaching the sixth story, and a plurality of vertical poles 137a, 138a. The first story working floor 131a is installed by fixing at the base plate 130a, intersecting at a right angle approximately at the center on the side, and the vertical poles 137a and 138a are erected on the first story working floor 131a. The second story working floor 132a and the third story working floor 133a are fixed, only by spanning the vertical poles 137a and 138a. Upper story working floors 134a-136a for the fourth story and upward are placed at positions higher than a form 12 and are constructed in collapsible structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffold used in a method for constructing a reinforced concrete wall.

[0002]

2. Description of the Related Art There are various methods for constructing a reinforced concrete wall using a formwork. For example, when constructing a relatively high barrier such as a dike, the reinforced concrete wall is required. Scaffolding equipment used for frames and various operations,
There is known a jump-up method in which a wall is moved upward every time one lot is built.

[0003] However, the scaffolding device used in the conventional jump-up method has the following technical problems.

[0004]

That is, in the jump-up method, when one lot of the wall is constructed, the mold is removed from the mold and the adhered concrete is removed, the mounting work of the embedded metal fittings, and the mold are removed. An operation of applying a release agent or the like is performed, and the mold is installed again.

However, in the scaffolding device used in the conventional jump-up method, no consideration has been given to performing such a work. Therefore, every time one lot is constructed, the formwork is moved to the outside of the scaffolding device. To the designated work yard to carry out such work.
Re-installation was troublesome and time-consuming, which was one of the causes of a decrease in work efficiency.

SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a scaffolding device for a method of constructing a reinforced concrete wall which improves work efficiency. is there.

[0007]

In order to achieve the above object, according to the present invention, a pair of molds are provided opposite to each other at a predetermined interval on both sides of a bar-arranged portion. In the scaffolding device used for the construction method of the reinforced concrete wall body which repeats the step of placing concrete in between sequentially and constructs the reinforced concrete wall body upward from the ground side,
It is arranged on both sides of the reinforced concrete wall to be constructed, is connected to each other by a connecting rod penetrating the wall, is supported by the reinforced concrete wall, and has a height capable of performing the work of two lots. Equipped with an external work platform,
A lower floor work floor capable of supporting the detached formwork in an upright state on the inner and outer work scaffolds; and a foldable upper floor work floor located at a position higher than the height of the formwork. And a passage space was formed at one end of each of these working floors.
According to the scaffolding device for the construction method of the reinforced concrete wall constructed as described above, since the inner and outer working scaffolds have a height capable of constructing two lots, the concrete is cured on the lower floor side. During the operation, the connecting work of the sheath tube for reinforcing arrangement can be performed on the upper floor side. Further, since the inner and outer working scaffolds have a lower working floor which can support the detached formwork in an upright state, the formwork can be supported on the lower working floor without carrying the formwork out of the scaffolding device. Thus, it is possible to carry out the work of removing the adhered concrete, the work of mounting the embedded metal fittings, and the work of applying the mold release agent. Further, the upper working floor located at a position higher than the height of the formwork of the inner and outer working scaffolds is foldable, so that the workfloor is not obstructed by being folded up. By expanding the folded portion, it is possible to easily perform bar arrangement work and the like. In addition, since the passage space is provided at one end of each of the upper and lower working floors, safety is improved. The inner and outer working scaffolds can be suspended and moved upward along the existing reinforced concrete wall while the formwork is independently supported, and can be sequentially supported by the upper reinforced concrete wall. According to this configuration, the inside and outside work scaffolds are moved upward using the curing time of the concrete cast between the formwork, so that the construction efficiency is improved. The formwork can be independently supported by a plurality of separators penetrating the reinforced concrete wall to be constructed. According to this configuration, the formwork can be stably and independently supported by the separator that has been frequently used. The inner and outer working scaffolds can support the connecting rod by inserting the connecting rod into a through hole of the existing reinforced concrete wall from which the separator has been removed. According to this configuration, the through hole from which the separator has been removed can be effectively used.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 to FIG. 11 show an embodiment of a scaffolding device for a reinforced concrete wall construction method according to the present invention.

The method of constructing a wall shown in FIG. 1 is applied when forming a side wall of a ground tank, and when constructing a wall 10 of a side wall, a reinforcing bar 11 is provided. A basic configuration is such that a pair of molds 12 are opposed to each other at predetermined intervals on both sides of the formed portion, and a process of placing high-fluid concrete between the molds 12 is sequentially repeated.

That is, in the method of constructing the reinforced concrete wall 10 of the present invention, the wall 10 having a height corresponding to the length of the formwork 12 is constructed while being sequentially connected upward from the ground side.

FIGS. 1 to 4 show the n-th lot wall 10
_The procedure for constructing _n is shown in order. In the construction procedure shown in these figures, the existing reinforced concrete walls up to the (n-1) -th lot (hereinafter abbreviated as existing walls) 1
0 _{n -1} , for example, the first and second lots are relatively low in height, so that the formwork 12 is supported using a temporary support such as a commonly used bitty to support the wall 10. Is constructed.

Further, in the case of this embodiment, the wall 10 having a horizontal cross section of a circle, an ellipse, or the like is constructed.
Are installed in an annular shape so as to surround the outer circumference of the wall body 10 in accordance with these shapes, and FIGS. 1 to 4 show a part thereof.

When constructing the wall body 10 _n of the n-th lot, first, as shown in FIG. 1, the scaffold device 13 according to the present invention is installed. As shown in detail in FIG. 10, the scaffolding device 13 has a pair of inner and outer working scaffolds 13a and 13b fixedly installed on both sides of the existing wall body 10n _-1 .

Each of the work scaffolds 13a and 13b includes base plates 130a and 130b, and work floors 131a to 136a and 131b to 136b for a plurality of floors from the first floor to the sixth floor.
A plurality of vertical columns 137a, 138a, 137b, 138b
And

Incidentally, reference numerals 139a and 139b in FIG.
Are members connected and fixed between the upper ends of the base plates 130a and 130b and the vertical columns 138a and 138b, and the connecting members 139a and 139b are provided in a predetermined direction in a direction orthogonal to the paper surface. A plurality of molds are arranged at intervals and are also used to support the removed mold 12.

Each base plate 130a, 130b has
The first-floor work floors 131a and 131b are fixed so as to be substantially perpendicular to the center of the side surface.
Vertical columns 137a, 138a, 137 on 1a, 131b
b, 138b are erected.

The second and third floor working floors 132a, 133
a, 132b, 133b are vertical columns 137a, 138a,
It is fixed only between 137b and 138b. Upper floor working floors 134a to 136a, 134b to 4th floor or higher
36b is located higher than the height of the mold frame 12 and is foldable.

FIG. 11 shows a folded configuration of the present embodiment. The upper working floors 132a, 133a,
Each of 132b and 133b includes a fixed floor plate A, a hinged-bonded folded floor plate B, a fixed girder C, and a telescopic girder D built in the fixed girder C.

A plurality of fixed girders C are arranged substantially in parallel, have a hollow rectangular cross-section, and extendable girders D having a similar cross-section are slidably inserted.

When the folding floor plate B is folded and placed on the fixed floor plate A, and the telescopic girder D is accommodated in the fixed girder C, the working floors 134a to 136a and 134b to 136
b falls slightly out of the width between the vertical columns 137a, 138a, 137b and 138b, and when the telescopic girder D is extended and the folding plate B is extended, each work floor 13
4a to 136a and 134b to 136b extend so as to approach the side of the wall body 10 _n to be constructed.

The scaffolding device 13 configured as described above has a height corresponding to two lots of the wall body 10 _n to be constructed, and the inner and outer working scaffolds 13 a and 13 b are connected to the existing wall body 10 _{n. -1} in contact with both sides of the existing wall 1
Inserting the connecting rod 15 into the through-hole formed when the separator 14 used for forming 0 _n-1 is removed,
By fixing with bolts and nuts, the existing wall 10
_{Make n-1} detachably supported.

When the scaffolding device 13 is installed, the vertical columns 137a, 138a, 137 of the inner and outer working scaffolds 13a, 13b are provided.
b, 138b is a dedicated passage space, and vertical columns 138
The space between a, 138b and the wall 10 _n to be constructed is a working space.

At this time, the formwork 12 used for constructing the wall body 10 _n is supported upright on the inner and outer work platforms 13a and 13b. When the installation of the scaffolding device 13 is completed, as shown in FIG. 2, the formwork 12 is opposed to both side portions of the reinforcing bar 11 assembled so as to protrude upward from the upper end of the existing wall body 10 _n-1. Will be installed.

In this case, a pair of facing formwork 12
Self-support when placing high-fluidity concrete. The pair of molds 12 of the present embodiment have the same configuration, and details of one of them are shown in FIGS.

The mold 12 shown in FIG.
2a, a horizontal fluttering material 12b, and a vertical fluttering material 12c. The form plate 12a is a flat metal plate, and a plurality of horizontal flutter members 12b are fixed on the back side in parallel at predetermined intervals in the vertical direction.

The vertical fluttering member 12c is arranged parallel to the horizontal fluttering member 12b at a predetermined interval so as to be orthogonal to the horizontal fluttering member 12b, and is fixed to the horizontal fluttering member 12b. Formwork plate 1
2a, horizontal and vertical fluttering materials 12b, 1 arranged in a lattice
A plurality of insertion holes 12d through which separators 14 to be described later are inserted are provided at predetermined intervals in the up, down, left, and right directions.

The insertion holes 12d are provided so that the positions of the pair of form frames 12 which are opposed to each other coincide with each other.

The four vertical fluttering members 12c, which are arranged near the widthwise ends of the form plate 12a, are extended downward, and the extended portions are vertically extended. The formed frame receiving bracket 16 is fixed so as to be sandwiched between the extended portions.

FIG. 9 shows details of the form receiving bracket 16. The form receiving bracket 16 shown in the figure includes a main body 16a having a concave cross section, and a mounting plate 16b wider than the main body 16a fixed to the upper end of the main body 16a.

A plate 16c of a predetermined length is fixed on both side surfaces on the upper end side of the main body 16a.
The portion where 6c is fixed is sandwiched between the vertical flutter members 12c. The mounting plate 16b is detachably fixed to the lower horizontal flap member 12b of the mold frame 12 by a bolt nut 16d.

A through hole 16e and a long bolt 16 screwed to a nut are provided on the longitudinal central axis of the main body 16a.
f and a long hole 16g are coaxially provided at a predetermined interval in the vertical direction.

The through-holes 16e and the long holes 16g are used for inserting connecting rods into the through-holes 18 formed by removing the separator 14 from the existing wall body 10 _n-1 , respectively. It is provided so as to correspond to the installation position of the separator 14.

The long holes 16g are vertically long to facilitate alignment between the mold receiving brackets 16 provided on the pair of molds 12, respectively. When the long bolt 16f is screwed in, the tip of the long bolt 16f is attached to the existing wall 1
0 _n-1 is abutted against the side surface, and by adjusting the screwing amount, it is possible to adjust the verticality of the formwork 12 that is opposed to the side.

The mold 12 configured as described above is used in FIG.
As shown in an enlarged manner to 0, the upper end of the existing wall body 10 _n-1 is installed so as to be sandwiched between the lower sides of the pair of form plates 12a, and separates 14 are inserted into the respective insertion holes 12d.
Is inserted, and the bolts and nuts are attached to tighten the form plates 12a.

Prior to the fastening operation by the separator 14, the form receiving bracket 16 is inserted into the through-hole 18 from which the separator 14 formed in the existing wall is removed, by the connecting rod (substantially, the scaffolding device 13). (Same as the one used for installation).

In this case, the long holes 16f adjust the through holes 12d between the facing form plates 12a so as to coincide with each other, and the long holes 16f also adjust the verticality of each form plate 12a. adjust.

By the above operation, the formwork 12 is fixed to the scaffolding device 1.
3, when it is self-supported in a state separated from the mold 3, high-fluidity concrete is poured between the molds 12 as shown in FIG.
A lot wall _n is formed. When the strength of the poured high-fluidity concrete is developed, the reinforcing bar 11 for the (n + 1) th lot is provided on the upper end side of 10 _n .

When performing the work of the reinforcing bars 11, the upper working floors 134a to 136a and 134b to 13f or more on the fourth floor or higher.
6b, the workable floor 134a
To 136a and 134b to 136b so as to be close to each other.

When the reinforcing bars 11 are completed, as shown in FIG. 4, the connecting rods attached to the separator 14 and the mold receiving bracket 16 are removed, the mold 12 is released, and the separated mold is removed. The frame 12 is supported by the scaffolding device 13.

The formwork 12 is connected to the inner and outer working scaffolds 13a, 13b.
In order to support the lower end of the formwork 12 on the connecting members 139a and 139b,
2a, 133a, 132b, and 133b are brought into contact with and supported by the ends thereof, and the mold 12 is set in an upright state.

A mobile worktable 50 is installed and used for the work of removing the adhered concrete, the work of attaching the embedding metal fittings, and the work of applying the mold release agent. When such operations are completed, the movable worktable 50 sequentially moves to a part where the mold is to be removed.

Next, in the case of this embodiment, the scaffold device 13
Because There is provided a height corresponding to two lots of the wall 10 _n, by supporting the scaffold 13 as the wall 10 _n-1, the construction of the n + 1 Lot wall 10 n _{+ 1} is performed .

As shown in FIG. 5, the wall body 10 _{n + 1} was constructed by mounting the formwork 12 on both sides of the reinforcing bar 11 for the (n + 1) th lot and mounting the formwork 12 on the separator 14 and the formwork bracket 16. This is supported by the connecting rod by itself, and high-fluidity concrete is cast between the formwork 12.

In this case, the formwork 12 is suspended by a crane or the like (not shown) and is moved upward. In this movement, the upper and lower working floors (4) of the inner and outer working scaffolds 13a and 13b are moved.
134a to 136a and 134b to 136b
Each is performed by folding.

When the placement of the high fluidity concrete is completed,
As shown in FIG.
a, 13b are detached from the wall body 10 _n-1 , and the inner and outer working scaffolds 13 a, 13 b are separated from the wall body 10 _n by a crane or the like.
And is supported by the newly formed wall body 10 _n of the n-th lot.

Movement of the inside and outside work scaffolds 13a and 13b
During the re-installation, the formwork 12 is _nLet them support themselves
deep. The support state of the inner and outer working scaffolds 13a and 13b
The elephant wall only rose by one lot,
Specifically, it is the same as the state shown in FIG.

When the support after the hanging movement of the inner and outer working scaffolds 13a and 13b is completed, as shown in FIG.
The connecting rods 11 for the lot are formed. Thereafter, the steps shown in FIG. 4 to FIG. 7 are sequentially repeated, whereby a predetermined reinforced concrete wall 10 is constructed.

Now, according to the scaffolding device 13 used for the construction method of the reinforced concrete wall 10 as described above,
Since the inner and outer working scaffolds 13a and 13b have a height capable of constructing two lots, the sheath for the reinforcing bars 11 is provided on the upper floor while the concrete is cured on the lower floor. Connection of pipes can be performed.

The inner and outer working scaffolds 13a, 13b
Lower floor working floors (1st to 3rd floors) 131a to 133a and 131b to 133 capable of supporting the detached formwork 12 in an upright state.
b, so that the formwork 12 is not carried out of the scaffolding device 13 and the work floors 131a to 133a,
In steps 1b to 133b, it is possible to perform, for example, an operation for removing adhered concrete, an operation for mounting an embedding metal fitting, and an operation for applying a mold release agent.

Further, the upper working floor (4) at a position higher than the height of the formwork 12 of the inner and outer working scaffolds 13a, 13b.
Floors-6th floor) 134a-136a, 134b-136b
Is foldable, so that it does not become an obstacle when the formwork 12 is lifted to the upper side by being folded, and the arrangement of the folded portion can be easily performed by expanding the folded portion.

The upper and lower working floors 131a to 131a
Since a dedicated passage space is provided at one end of 6a, 131b to 136b, safety is also improved.

Further, in the case of the present embodiment, the inner and outer working scaffolds 13a and 13b are suspended and moved upward along the existing reinforced concrete wall 10 while the formwork 12 is independently supported. Since the upper and lower reinforced concrete walls 10 are successively supported, the inside and outside work scaffolds 13a and 13b are utilized by utilizing the curing time of the concrete cast between the formwork 12 and the like.
Is moved upward, so that construction efficiency is improved.

In the case of this embodiment, the mold 12 is
Since the plurality of separators 14 penetrating the reinforced concrete wall body 10 to be constructed are self-supported, the formwork 12 can be stably supported by the conventionally used separators 14 stably.

In this embodiment, the inner and outer working scaffolds 13a and 13b support the connecting rod 15 by inserting the connecting rod 15 into the through hole of the existing reinforced concrete wall 10 from which the separator 14 has been removed. The through hole from which 14 has been removed can be used effectively.

[0055]

As described above in detail in the embodiments,
ADVANTAGE OF THE INVENTION According to the scaffolding apparatus for the construction method of a reinforced concrete wall body concerning this invention, since the crane work of a formwork performed during re-installation after demolding is performed on a working scaffold, work efficiency improves.

[Brief description of the drawings]

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory view of the first steps of a reinforced concrete wall construction method using a scaffolding device according to the present invention.

FIG. 2 is an explanatory view of a step performed subsequent to the step of FIG. 1;

FIG. 3 is an explanatory view of a step performed subsequent to the step of FIG. 2;

FIG. 4 is an explanatory view of a step performed subsequent to the step of FIG. 3;

FIG. 5 is an explanatory view of a step performed subsequent to the step of FIG. 4;

FIG. 6 is an explanatory view of a step performed subsequent to the step of FIG. 5;

FIG. 7 is an explanatory diagram of a step performed subsequent to the step of FIG. 6;

FIG. 8 is a plan view and a side view of a form used in the method of constructing a reinforced concrete wall using the scaffolding device according to the present invention.

9A and 9B are a plan view and a side view of a mold receiving bracket fixed to the mold shown in FIG.

FIG. 10 is an enlarged view of FIG. 2;

FIG. 11 is an enlarged explanatory view of a main part of FIG. 10;

[Explanation of symbols]

10, 10 _n wall 10 _n-1 existing reinforced concrete wall 11 Reinforcing 12 Formwork 14 separator 13 scaffold 13a in the working scaffold 130a base plate 131a, 132a, 133a under floor (first floor to 3 floor) working floor 134a, 135a, 136a Upper floor (fourth to sixth floor) work floor 137a, 138a Vertical column 13b Outside work scaffold 130b Base plate 131b, 132b, 133b Lower floor (first floor to third floor) work floor 134b, 135b, 136b Upper floor ( 4th to 6th floor) Working floor 137b, 138b Vertical column

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Minoru Okudachi 4-33 Kitahama Higashi, Chuo-ku, Osaka-shi, Osaka Inside the Obayashi Corporation head office (72) Inventor Shuji Hata 4-33 Kitahama-higashi, Chuo-ku, Osaka-shi, Osaka (72) Inventor Eiji Omura 3-6-1 Kitakyuhouji-cho, Chuo-ku, Osaka-shi, Osaka Prefecture Inside Konoike-gumi Osaka Main Store (72) Inventor Takenobu Nishizaki, Hirano-cho, Chuo-ku, Osaka, Osaka 4-1-2, Osaka Gas Co., Ltd. F-term (reference) 2E177 FA05 FB01

Claims (4)

[Claims] 1. A step of arranging a pair of formwork opposite to each other at a predetermined interval on both sides of a portion where a reinforcement is provided, and sequentially casting concrete between the formwork, thereby sequentially reinforcing a reinforced concrete wall body. A scaffolding device used for a method of constructing a reinforced concrete wall that is constructed from the ground side upwards, disposed on both sides of the reinforced concrete wall to be constructed, and connected to each other by a connecting rod penetrating the wall. An inner and an outer working scaffold supported by the reinforced concrete wall and having a height capable of performing work for two lots; and the detached formwork can be supported in an upright state on the inner and outer working scaffolds. A lower working floor, and a foldable upper working floor at a position higher than the height of the formwork, and a passage space is formed at one end of these working floors. Rebar Build method of construction scaffolding apparatus of Nkurito wall. 2. The inner and outer working scaffolds are suspended and moved upward along an existing reinforced concrete wall while the formwork is independently supported, and are sequentially supported by an upper reinforced concrete wall. The scaffolding device according to claim 1, characterized in that: 3. The scaffolding device according to claim 1, wherein the formwork is independently supported by a plurality of separators penetrating the reinforced concrete wall to be constructed. 4. The reinforced concrete wall according to claim 3, wherein said inner and outer working scaffolds insert and support said connecting rods in through holes of said existing reinforced concrete wall from which said separator has been removed. Scaffolding equipment for construction method.