JPH0475978B2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention relates to a formwork method applied to the construction of buildings with reinforced concrete structures, and more specifically to a slip form method in which the formwork is raised continuously with jacks and scaffolding. This invention relates to a formwork construction method that incorporates the advantages of the jump form construction method, which integrates formwork, and equipment for the method.

<<Prior Art>> Typical construction methods for reinforced concrete high-rise tower structures include the slip form method and the jump form method.

The slip form construction method starts from a height of 1.2 meters.
This construction method, in which concrete is poured continuously while a 1.5-meter formwork is pushed up with jacks, produces a high-quality concrete structure with no pouring joints, and the construction period is short. However, since the formwork rubs up on the surface of very young concrete, the concrete surface becomes rough, and the rods are easily buckled because the reaction force of the jack for raising the yoke is applied to the rods embedded in the concrete. Therefore, in order to set the rod diameter to a safe thickness that will not cause buckling, and to ensure sufficient concrete cover thickness, it is believed that a minimum wall thickness of 200 mm is the limit.

On the other hand, the jump form construction method incorporates a lifting mechanism into a large formwork with scaffolding, which eliminates the need for full-scale scaffolding, which is more advantageous for high-rise structures.
In addition to the complicated lifting mechanism, it was necessary to wait until the frame, which took on the reaction force, was strong enough to support these large formworks.

<<Problems to be Solved by the Invention>> The present invention has been made in view of the above circumstances, and its purpose is to incorporate the advantages of the slip form construction method and the jump form construction method, and to solve the problems that are considered impossible with the slip form construction method. The aim is to make it possible to construct complex shapes that had previously been constructed in a time comparable to that of the slipform construction method.

<<Means for Solving the Problems>> In order to achieve the above object, the formwork construction method and device of the present invention support opposing slipform formworks by a yoke via a camber, and provide a jump to the yoke. The formwork for the jump form is suspended, then cocrete is cast between each formwork, and after a predetermined period of time for the formwork to remain, the formwork for the jump form is removed from the mold, and the formwork for the jump form is used in the next process. Concrete is poured into the formwork for the slip form continuously while assembling reinforcing bars at points corresponding to the formwork installation position, and the yoke is gradually raised along the rod, so that the yoke is placed in the formwork for the jump form. When the jump form has moved upward to the position corresponding to the next process, pouring concrete into the form for the slip form and raising the yoke is stopped, and the form for the jump form is installed at the position for the next process, and concrete is poured into it. Waiting for a predetermined mold retention period to elapse, and then demolding the jump form mold,
Next, while the yoke is raised along the rod, concrete is continuously poured into the formwork for the slipform until the yoke reaches the position where the formwork for the next jumpform is installed, and then the concrete is poured into the formwork for the slipform, and then the concrete is poured into the formwork for the slipform. It is characterized by repeating the process of installing formwork, and its equipment consists of a rod whose lower part is buried in the concrete previously poured, and a jack that is supported by the rod and raised along the rod. The present invention is characterized by comprising a yoke provided with the yoke, a formwork for the slip form supported by the yoke, a jump-up form hanging material suspended from the yoke, and a formwork for the jump form that can be freely engaged and detached from the hanging material. It is.

《Operation》 The thicker parts of the concrete structure are constructed using the slip form method, and the thinner parts, such as partition walls, are constructed using the jump form construction method.The jump form formwork and its scaffolding are suspended from the yoke. It's getting better.

Therefore, there is no need to take a reaction force to a thin part such as a partition wall, and it is sufficient to wait for the formwork to remain for a period long enough to be removed.

<<Example>> Hereinafter, the formwork construction method and its apparatus of the present invention will be described with reference to the drawings. The figure is for illustrative purposes only. In the figure, the outer wall of the building is a core wall 1 with a thickness of 250 to 400 mm, and the interior is partitioned by partition walls 2 with a wall thickness of about 120 mm. It is classified.

The top of the yoke 3, which has a gate-shaped longitudinal section, is constructed of a lattice rigid truss, and a flooring material is installed on top of this to form a working floor 4. A concrete bucket for unloading concrete and a tower (not shown) extend above the work floor 4 and are located.

The yoke legs 5 of the yoke 3 are arranged so as to sandwich the core wall 1 from the inside and outside, and a slide jack 6 is attached to the vertical midway part of the yoke legs 5. It is fitted into the slide jack 6. That is, the yoke 3 is supported by a rod 7 via a slide jack 6 attached to a yoke leg 5.

A slip form frame 8 is fixed to the yoke leg 5 via a camber 9. The other jump form frame 10 is fixed inside a jump form hanging material 11 which is pivotally suspended from the top of the yoke 3 in correspondence with the installation position of the partition wall 2.

The lower end of the jump-up form hanging material 11 is longer downward than the jump-up form form 10;
A caster 12 is provided inside the lower end of the caster 12 in contact with the wall surface of the partition wall 2 which has been previously cast and the formwork 10 has been removed.

Further, the yoke 3 is provided with a core wall suspended scaffold 14 suspended along the inside and outside of the core wall 1 and a partition wall suspended scaffold 15 suspended along the inside and outside of the partition wall 2.

Therefore, each formwork 8, 10 and scaffolding 14,
15 rises integrally with the yoke 3.

In Fig. 1, concrete is poured into the formwork 10 for the jump form, and the concrete is being waited for the elapse of the formwork retention period.When this period has elapsed, the formwork 10 for the jump form is poured into the formwork 10 as shown by the white arrow in the figure. Expand outward and remove the mold. The top of the jump-up formwork hanging material 11 is pivotally supported on the top of the yoke 3, so the jump form formwork 10 can be removed from the jump-up formwork hanging material 11 using this pivot shaft 16 as the rotation axis. This is done by moving in unison in the direction of demolding.

Next, as shown by the arrow in Fig. 2, the partition wall reinforcing bars 17
As the yoke 3 is gradually slid up with a slide jack 6 while assembling the core wall reinforcing bars 18, concrete is continuously poured into the formwork 8 for the slip form. At that time, as the yoke 3 rises, the jump-up formwork hanging material 1
1 also rises, so formwork 10 for jump form
When the concrete placement position for the next partition wall is reached, the concrete placement work into the slipform formwork 8 and the sliding up of the yoke 3 are stopped, and the jump-up formwork hanging material 11 is moved into the jumpform formwork 8. Push it back to the set position of frame 10. Then, concrete is poured into the formwork 10 for the jump form, and after the formwork period has elapsed, it is removed from the form, and the work moves on to sliding the yoke 3 up. By repeating these steps, the core wall 1 and partition wall 2 are successively constructed upward.

The casters 12 keep the jump-up formwork hanging member 11 in a stable position when the yoke 3 slides up. Further, the lateral pressure during concrete pouring when concrete for the partition wall is poured into the formwork 10 for the jump-up form is borne by the separator.

<<Effects>> As described in detail above, according to the formwork construction method and its device of the present invention, the scaffolding is suspended on the yoke for the slipform construction method, and the formwork for the jumpform construction is also suspended. As for the jump form part, it is possible to construct complex shapes and thin walls without the need for replacing the formwork or raising it. In addition, the rising reaction force of the jump form formwork is not absorbed by the wall that is previously cast using the jump form construction method, so the curing period is simply waiting for the formwork to remain long enough to allow it to be removed. It is faster than the speed.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram for explaining the present method and its apparatus, and FIG. 2 is an explanatory diagram showing a state in which the jump form mold is removed from the mold. 1... Core wall, 2... Partition wall, 3... Yoke, 4... Work floor, 5... Yoke legs, 6... Slide jack, 7... Rod, 8... Formwork for slip form, 9... camber, 10... formwork for jump form, 11... jump up formwork hanging material, 12... caster, 14... core wall suspension scaffolding, 15... partition wall scaffolding, 16... pivot shaft,
17...Partition wall reinforcing bars, 18...Core wall reinforcing bars.

Claims (1)

[Claims] 1. Opposing formwork for slipforms is supported by a yoke via a camber, and formwork for jumpform is suspended from the yoke, and then concrete is poured between each of the formworks. Wait for the predetermined formwork retention period to elapse, remove the jump form formwork, and assemble the reinforcing bars at the locations corresponding to the jump form formwork installation positions in the next process, and move the yoke along the rod. Continuously pour concrete into the formwork for the slipform while gradually raising it, and when the yoke moves upward to the position corresponding to the next process of the formwork for the jumpform, pour the concrete into the formwork for the slipform and Stopping the rising of the yoke, installing the formwork for the jump form at the next process position, pouring concrete into it, waiting for a predetermined retention period of the formwork to elapse, and removing the formwork for the jump form; Next, while raising the yoke along the rod, concrete is continuously poured into the slip form form until the yoke reaches the position where the next jump form form is installed, and then the concrete is poured into the slip form form again. A formwork construction method characterized by repeating the process of installing formwork. 2. A rod whose lower part is buried in pre-placed concrete, a yoke supported by the rod and equipped with a jack for rising along the rod, and a formwork for a slipform supported by the yoke. A formwork device comprising: a jump-up formwork hanging material suspended from the yoke; and a jump form formwork that can be freely engaged and detached from the suspension material.