JPH0443524B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> This invention sequentially places concrete in multiple levels while automatically moving the formwork up.
This relates to self-lifting formwork equipment for constructing high-rise structures such as dams.

<Conventional technology> Conventionally, as formwork for pouring concrete for dams, etc., there is a type of formwork in which the lower part of the formwork support frame is fixed to the existing concrete layer below with Siebolds, and the formwork is installed on the concrete pouring surface. .

<Problems to be Solved by the Invention> However, with such conventional formwork equipment, it is necessary to bring a small crane to the site and use it to install and peel off the formwork, which requires a skilled worker to carry out the work. In addition to requiring workability,
There were many problems in terms of safety and economy.

This invention solves the above-mentioned problems, and aims to provide a self-lifting formwork device that can perform operations such as lifting and peeling of formwork with simple operations, safely and at low cost. .

<Means for Solving the Problems> A self-lifting formwork apparatus according to the present invention includes a medium formwork attached to a plurality of formwork support frames and one side formwork each sandwiching the medium formwork from both sides, A beam material that swingably supports the formwork support frame of the medium formwork is provided on the upper part of the medium formwork and the side formwork, and between both ends of this beam material and the side formwork, the medium formwork and The structure is such that a jack for alternately raising the side formwork is attached, and a Siebold can be attached to and removed from each of the above-mentioned formwork support frames.

<Function> The formwork support frame according to the present invention fixes the Siebold tip, which is attached to the frame so as to be freely removable and removable, to an anchor bolt buried in the concrete placement part, and after the concrete hardens, the formwork support frame of the medium formwork is attached. After removing the Siebold inserted into the frame, extend the jacks on the side formwork,
The medium formwork connected to the beam material is automatically raised, and at the predetermined raised position, a Siebold is inserted into the formwork support frame of the medium formwork to pour concrete, and the Siebold is placed in the concrete pouring area. Bury the anchor bolt at the tip. After the concrete hardens, the Siebold inserted into the formwork support frame of the side formwork is removed, the jacks are contracted, the side formwork is raised to the position of the middle formwork, and the side formwork is raised to the position of the middle formwork. Concrete is poured inside the frame, a Siebold is inserted into the formwork support frame, and the tip of the Siebold is buried in the concrete. In this way, the middle formwork and the side formwork are raised alternately and act to perform concrete pouring of the dam.

<Embodiment of the Invention> An embodiment of the invention will be described below with reference to the drawings. In Fig. 1, 1 is a medium formwork, 2 is a pair of side formworks that are slidably arranged side by side on both sides so as to sandwich this formwork, and 3 is a plurality of formworks that constitute each of these formworks 1 and 2. A plurality of crosspieces 5, 6 that integrally fix the board 4
A plurality of formwork support frames are respectively attached to the middle formwork 1 and the side formwork 2 via the crossbars 3, and 7 is screwed into the upper and lower parts of each formwork support frame 5, 6 so as to be freely insertable and removable. Siebolds (dummy bolts) are fixed with nuts 8, and 9 is a wheel axle that is attached to the middle of each formwork support frame 5, 6 so that it can move in and out, and a wheel 10 is attached to the end of this on the concrete pouring side. There is. Reference numeral 11 denotes a support jack that is attached to the lower part of each formwork support frame 5, 6 so as to be freely removable and comes into contact with the concrete pouring surface together with each formwork 11, 2. Reference numeral 12 denotes a face plate protruding from the concrete joint surfaces of the middle formwork 1 and the side formwork 2, and has a groove shape as shown in FIGS. 2 to 4.

13 is an H provided above each of the formworks 1 and 2 above.
The upper end of the formwork support frame 5 of the medium formwork 1 is swung by a pin 15 as shown in FIG. It is pivoted for free movement. Note that this beam member 13 is provided with a large number of through holes 16 for weight reduction and the like.

A cylinder portion 17a, which is one end of the jack 17, is fixed to the center of each side formwork 2 via bolts or crossbars 3, and is further attached to an erection rod 18 installed between the pair of formwork support frames 6, 6. It is also fixed with bolts etc. 17b is the piston part of the jack 17, and the protruding piece 19 connected thereto is the third piston part.
As shown in the figure, it is connected to a bracket 20 protruding from the lower surface of the beam 13 by a bolt 21. Although not shown in Fig. 1, the second
As shown in the drawings and FIG. 4, a scaffold attachment member 22 for attaching a work scaffold is connected to all or part of the formwork support frames 5, 6 via attachment rods 23.

Reference numeral 24 denotes a fixed frame attached to the side of the side formwork 1 that is in contact with the middle formwork 2, and 25 denotes a punching frame that is in contact with this. Both of these frames are arranged on the inclined surface 26 of each other as shown in FIG. I am in contact with. 27 is the punching frame 2
This threaded rod 27 is rotatably attached to the nut 28 attached to the fixed frame 24.
are screwed together. Therefore, by rotating the threaded rod 27, the punching frame 25 can be raised diagonally upward relative to the fixed frame 24, that is, in a direction away from the side edge of the medium frame 1.

On the other hand, as shown in FIG.
The head of bolt 30 screwed into 9 is in contact with
The nut 31 that adjusts this contact pressure is the bolt 3.
It is screwed to 0.

The self-lifting formwork device having such a configuration is installed in the concrete pouring area at the bottom of the dam in the state shown in FIG. The Siebolds 7 are inserted into each of the formwork support frames 5 and 6 before and after this. At this time, the tip of the Siebold 7 is buried in concrete. After this concrete has hardened, the Siebold 7 screwed into the formwork support frame 5 is extracted from the concrete, the wheel axle 9 is protruded, and the wheel 10 is brought into contact with the concrete pouring surface P as shown in FIG. , the support jack 11 can be further retracted. In this way, the formwork support frame 5 is tilted about the pin 15 in the direction of arrow Q in FIG.
peels off from the concrete surface. Also, before and after this peeling operation, the threaded rod 27 shown in FIG. 5 is rotated to raise the punching frame 25 obliquely upward relative to the fixed frame 24. For this reason, this punching frame 2
5 and the side edge of the medium form frame 1 is released and the sliding friction is eliminated, so that the medium form frame 1 can be easily moved.

Next, the medium frame 1 is rotated further in the peeling direction, and the pair of jacks 17 are activated. As a result, the piston part 17b extends upward with respect to the cylinder part 17a, and the middle formwork 1 moves upward in a substantially parallel manner via the formwork support frame 5 connected to the beam material 13, as shown in FIG. Keep it in the state shown.
In such a state, the wheel axle 9 of the formwork support frame 5 of the medium formwork 1 is retracted, and the medium formwork 1 is
It is rotated about the pin 15 in the opposite direction to the above, returned to a predetermined angle, concrete is poured inside the pin 15, and the tip of the Siebold 7 is made to protrude into the concrete before and after this. In this way, when this concrete hardens,
From now on, the Siebold 7 that has passed through the formwork support frame 6 of the side formwork 2 will be removed, the same wheel axle (not shown) as above will be protruded, the support jack 11 will be retracted, and the side formwork 2 will be poured into concrete. It peels off from the surface P.

Next, in this state, the jack 17 is operated to contract the piston portion 17b from the state shown in FIG. 8 to the state shown in FIG. 1. Therefore, the side formwork 2 becomes free with respect to the concrete pouring surface P.
is lifted upward via the beam 13. next,
Concrete is poured inside this side formwork 2, and one end of the Siebold 7 inserted into the formwork support frame 6 on the side formwork 2 is buried in the concrete. When this concrete has solidified in this way, the Siebold 7 on the formwork support frame 5 of the medium formwork 1 is pulled out again, and the medium formwork 1 is raised relative to the side formwork 2 by the same operation as described above. , pouring concrete. In this way, the dam wall is constructed by sequentially and alternately pushing up the middle formwork 1 and the side formwork 2. In addition, each of the formworks 1 and 2 is subjected to an outward pressing force due to concrete pouring, and a bending force is applied particularly to the Siebold 7 in the center and lower part, as shown in FIG. By pressing the heads of the bolts 30 of the mounting plate 29 attached to the formwork support frame 6 to these Siebolds 7,
To prevent the Siebold 7 from bending, each formwork 1,
2 can be prevented from occurring.
In this way, the concrete pouring surface can be made uniform over the entire area.

<Effects of the Invention> As described above, according to the present invention, the middle formwork and the side formwork are connected to the jack via the beams provided on the upper part of the middle formwork, and the formwork supporting frame is integrated with each formwork. Since the Siebold can be attached and removed freely, the middle formwork and side formwork can be automatically raised alternately along the concrete pouring surface with simple work, which is an advantage not found in conventional equipment. This has the effect that it can be obtained.

[Brief explanation of drawings]

FIG. 1 is a front view of a self-lifting formwork apparatus according to the present invention, FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1, FIG. 3 is a cross-sectional view taken along line B-B in FIG. 1, and FIG. is a sectional view taken along the line C-C in Fig. 1, Fig. 5 is a cross-sectional view showing the punched frame structure at the end of the side formwork, Fig. 6 is a side view showing Siebold's bending prevention structure, and Fig. 7 is the middle formwork. FIG. 8 is a side view showing how the medium formwork has peeled off from the concrete placement surface, and FIG. 1... Medium formwork, 2... Side formwork, 5, 6... Formwork support frame, 7... Siebold, 13... Beam material, 17... Jacket.

Claims (1)

[Claims] 1. A medium formwork attached to a plurality of formwork support frames, and one side formwork each sandwiching the medium formwork from both sides,
A beam material located above the medium formwork and the side formwork to support the formwork support frame of the medium formwork, and the medium formwork installed between both sides of the beam material and the side formwork. Jackets for alternately raising the side formwork,
A self-lifting formwork device comprising a Siebold that is removably attached to each of the above formwork support frames.