JPH07259334A - Bearing structure of form panel used for self-elevation type form device - Google Patents

Abstract

PURPOSE:To improve the efficiency of operation by movably hanging a form device being connected by bolts through the rear brackets of form panels and having a timbering, a bench, etc., on a rear and assembling and disassembling the form panels. CONSTITUTION:Brackets 22a, 22b are mounted on joint surfaces with adjacent panels on the rears of a plurality of form panels 15 disposed along the sectional shape of a concrete structure, and joined mutually by bolts and nuts. A form device 7 with a timbering 16, a working frame 20, an elevation jack 24, etc., is suspended movably on the rears of the assembled form panels 15 in the vertical direction. Main reinforcements 5, hoops 6, etc., are arranged, the form device is surrounded by the form panels 15 and concrete is placed, and the form panels 15 in solidified sections are disassembled gradually while removing clamping bolts on a lower bench 20c with successive upward construction. Accordingly, concrete can be placed continuously efficiently even in a high structure such as a pier.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support structure for a form panel used in a self-elevating form device suitable for constructing a concrete structure such as a high pier.

[0002]

2. Description of the Related Art A sliding formwork method has been developed as a method of continuously constructing a concrete structure of this type. The sliding formwork device used in this construction method includes a formwork arranged along the sectional shape of a structure, a support device outside the formwork for supporting the formwork, and a structure fixed to the support device. It is known that a main bar or guide rod buried in an object is provided with a lifting jack that lifts by taking a reaction force.

Once the formwork device is set, the concrete jack is driven into the formwork by driving the ascending jack to raise the formwork in sequence, whereby the concrete structure is moved upward. It can be constructed continuously, and a concrete structure can be constructed in a short time as compared with a work method in which work cycles of pouring concrete and assembling, dismantling, and reassembling formwork are repeated.

[0004]

However, in the sliding formwork device used in such a conventional construction method,
Since the mold rises while it is in contact with the surface of the concrete before the strength of the concrete is sufficiently expressed, there is a risk that the surface of the concrete will become uneven in color due to scratches and rust, and the form will be Since the formwork is raised while cutting the adhesion to the concrete in a state of being in contact with the entire outer surface, the sliding resistance is large and the capacity of the jack needs to be set large, so that it is necessary to enlarge the entire apparatus. .

In order to solve the above problems, the present applicant has
We have developed a self-elevating formwork device that separates the formwork panel and the supporting work and raises the entire device including the supporting work while leaving the formwork panel on the concrete pouring surface.

However, since the conventional formwork has the formwork panel (shroud) and the supporting structure integrated, it is possible to use such a conventional formwork in the formwork apparatus developed by the present applicant. There is a demand for a simple support structure that does not reduce the advantages of the sliding formwork method that does not require assembly, disassembly, and reassembly of the formwork.

The present invention has been made to solve the above problems, and an object of the invention is to provide a self-elevating formwork apparatus which raises the entire apparatus including supporting work while leaving the formwork panel on the concrete placing surface. Easy to assemble and dismantle formwork panels used,
An object is to provide a simple support structure that can be reassembled.

[0008]

In order to achieve the above object, the present invention is directed to a plurality of formwork panels arranged along the cross-sectional shape of a concrete structure to be constructed, and the back and forth of the formwork panels to the upper and lower sides. A plurality of supports that slide relative to each other,
A support structure for a formwork panel used in a self-elevating formwork device, which comprises a work platform that is fixedly supported by the support work and is raised, and is adjacent to the rear side of both side edges of the formwork panel. Brackets that are in mutual contact between the form panels are provided in the vertical direction, while the brackets are in positions where they are in contact with each other between the upper and lower mold panels and do not interfere with the supporting work on the rear side of the upper and lower edges. Are intermittently provided, and brackets that are brought into contact with each other are fastened with bolts and nuts.

[0009]

In the structure for supporting the form panel having the above structure, the form panel can be easily assembled by simply abutting the upper, lower, left and right brackets and fastening the bolts and nuts. Since the upper and lower brackets are intermittently provided at positions where they do not interfere with the supporting work, they do not interfere with relative sliding between the form panel and the supporting work, and do not hinder the lifting operation of the entire formwork apparatus. At the time of concrete pouring, each formwork panel is supported by the shoring and counteracts the pouring pressure.

On the other hand, the existing mold on the lower side can be easily demolded by removing the bolts and nuts after it is separated from the supporting work as the whole apparatus moves upward.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows the overall configuration when the formwork apparatus according to the present invention is applied to the construction of a high pier, and FIG.
FIG.

In the high pier 1 in the figure, for example, four hollow steel pipes 3 are erected on a foundation 2 constructed above the ground, and a number of main reinforcements 5 are arranged around the hollow steel pipe 3 and
Further, the PC strands 6 forming the horizontal streaks are wound around the outer periphery thereof, and concrete C is placed inside the area surrounded by the self-elevating formwork device 7, so that the concrete C is sequentially built upward.

An H-shaped steel material 8 is installed on the top of the hollow steel pipe 3 in a state of being combined in a cross girder shape.
A large number of PC steel wires 9 hanging from the shaped steel material 8 and receiving the reaction force
Suspended by. Further, a concrete pump truck or the like is arranged on the ground portion, and the hose 12 is extended to supply the concrete to the concrete pouring position.

The formwork device 7 includes a plurality of formwork panels 15 arranged along the cross-sectional shape of the high pier 1, and a formwork panel 15
A plurality of supports 16 which are in contact with the back side of the support and are slidably supported in the vertical direction, a middle stage work platform 20b in which the back side of the support system 16 is fixedly supported by welding or the like, and an upper stage work platform arranged above and below it. 20 a and a work platform 20 in which a lower stage work platform 20 c is integrated.

As shown in FIG. 3, the formwork panel 15 includes a large number of linear formwork panels 14a arranged in straight parts of a concrete structure and a curved formwork panel 14b arranged in corners. The linear panel 14a is made of a FRP plate having a length of 60 cm and a width of 146 cm, and each form panel 14b is made of a bent veneer plywood having a length of 60 cm. The size and weight are so small that they can be easily handled by hand. A bracket 22a made of an angle member is provided along the vertical direction on the outer side of each lateral joint edge, and a bolt and nut (not shown) is attached in a state where the brackets 22a of the adjacent formwork panels are brought into contact with each other. By fastening, the horizontal form panel 14a, 14a or 14a, 14b is joined.

Further, a bracket 22b is provided at the vertical joining edge portion at a position avoiding the sliding contact portion of the supporter 16, and the brackets 22b of the adjacent formwork panels are brought into contact with each other to form a bolt. The upper and lower formwork panels 14a (or 14b) are joined by fastening the nuts.

Although the number of the mold panel panels 14a and 14b is drawn to be an appropriate number in the figure, it is set to an appropriate number depending on the sectional size of the structure and the curvature of the corners.

Each support 16 is made of a substantially rectangular hollow steel material and has a height dimension of about three form panel.
Further, as shown in an enlarged view of a part of FIG. 2, a sliding material sheet 23 such as Hymoler (trade name) is attached to the sliding contact surface of the support work 16 with the form panel 15, and the form device is used. The sliding resistance with the formwork panel 15 at the time of ascending 7 is reduced. The support 16 may be a hollow steel material having a substantially circular cross section or a rectangular or circular solid steel material, as a matter of course.

A lifting jack 24 is arranged on the upper work platform 20a, and a work carriage 25 for feeding out the PC strands 6 is also arranged on the work rack 20a.

The middle stage work platform 20b is a work platform for assembly, and a worker waiting there winds the PC strand 6 fed from the work vehicle 25 around the outer periphery of the main bar 5 and fixes it. After the winding is completed, the form panel 15 is built.

The lower work platform 20c is a work platform for disassembling the form panel, and the form panels 14a and 14b removed by a worker standing by here are returned to the work platform 20 again to It is diverted to the construction of the frame panel 15.

As shown in FIG. 2, the lifting jack 24 inserts the respective PC steel wires 9 to support the entire formwork apparatus 7 in a suspended state and simultaneously drives the lifting jacks 24 at the same time. As a result, the reaction force is applied to the PC steel wire 9 to raise the work platform 20 and the supporters 16 in a worm-like manner.

Next, a work procedure for constructing high piers by pouring concrete by using the above-described formwork apparatus 7 will be described.

First, a new form panel 15 is built on the existing form panel 15. The formwork panel 15 can be easily built by simply abutting the upper, lower, left and right brackets 22a, 22b and fastening the bolts and nuts.

By driving the lifting jack 24 after the construction of the formwork panel 15 is completed, the supporting work 16 moves up while slidingly contacting the rear surface of the new formwork panel 15, and the supporting work 16 is replaced by the new formwork panel 15. Then, the driving of the lifting jack 24 is stopped. Since the upper and lower brackets 22b are intermittently provided at positions where they do not interfere with the supporting structure 16, the upper and lower brackets 22b do not interfere with relative sliding between the formwork panel 15 and the supporting structure 16 and hinder the lifting operation of the entire formwork apparatus. There is no such thing. In addition, the formwork panel 15 on the surface of the concrete
Is left and the formwork panel 15 does not rub the surface of the concrete, so that the surface finish of the concrete can be improved.

Next, concrete C is poured into the mold through the concrete hose 12. The placing pressure of the concrete is received by the work platform 20 through the form panel 15 and a large number of supporters 16 that are in contact with the back surface of the form panel 15.

In parallel with this concrete C placing work, the existing work form panel 15 is dismantled and removed on the lower work platform 21, and the removed formwork panels 14a and 14b are lifted on the work platform 20. It is diverted to the assembly work of the new formwork panel 15. The formwork panel 15 can be easily disassembled by removing the bolts and nuts. The concrete structure constructed according to the present invention is not limited to the rectangular shape and may be a wall-shaped one.

[0028]

As described above in detail with reference to the embodiments, in the supporting structure for the form panel used in the self-elevating form device according to the present invention, the upper, lower, left and right brackets are butted to each other and are joined with bolts and nuts. The mold is completed by simply doing this, and the upper and lower brackets are provided at positions that do not hinder the sliding of the support work, so it does not hinder the lifting operation of the entire formwork device, and the lifting operation can be performed smoothly. You can Further, when pouring concrete, a large number of supporting works abut against the outer periphery of the form frame constituted by each form panel to counter the pouring pressure, so that the strength can be maintained sufficiently.

The existing formwork on the lower side is in a state of being separated from the supporting work as the whole apparatus is lifted, and the structure frame can be removed from the formwork body by disassembling it into each formwork panel simply by removing the bolts and nuts. Since each of the above mold panels can be reused for the next mold building, there is an advantage that there is no need to replenish them from the outside.

[Brief description of drawings]

FIG. 1 is an overall explanatory diagram in the case where the present invention is applied to construction of a high pier.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is an exploded perspective view showing an arrangement of formwork panels according to the present invention.

[Explanation of symbols]

 1 Takadashi (concrete structure) 5 Main bar 7 Formwork device 9 PC steel wire (reaction force receiving) 14a, 14b Formwork panel 15 Formwork panel 16 Support work 20 Work platform 22a, 22b Bracket 24 Climbing jack C Concrete

Claims (1)

[Claims] 1. A plurality of formwork panels arranged along the cross-sectional shape of a concrete structure to be constructed, a plurality of support works that relatively slide vertically on the back surface of the formwork panel, and the support works. A support structure for a formwork panel used in a self-elevating formwork device that includes a work platform that is fixedly supported and lifted, wherein adjacent formwork panels are provided on the rear sides of both side edges of the formwork panel. While vertically providing brackets that abut each other, the brackets are intermittently placed on the rear side of the upper and lower edges at positions where they abut each other between the upper and lower formwork panels and do not interfere with the supporting work. A support structure for a form panel used in a self-elevating form device, characterized in that brackets that are abutted against each other are fastened with bolts and nuts.