JPH03287977A - Form method and form device - Google Patents

Abstract

PURPOSE:To enhance the working efficiency by providing a beam form having a U-shaped section and posts with screw jacks provided with sleeper seats on the upper ends of them on a truss of the upper part of a beam form shoring into which expansion posts are incorporated. CONSTITUTION:A beam form 19 having a U-shaped section connecting beam side forms 19a to a beam bottom form 19b with a hinge is provided on a truss 18 of the upper part of a beam form shoring 11 into which support type expansion posts 12 are incorporated. Posts 22 with screw jacks provided with sleeper seats 23 on the upper ends of the beam form shoring 11 are provided between rising sections 14a of a horizontal beam 14 and the beam side forms 19a. After that, the ends of a PC plate 30 are mounted on the upper ends of the beam side forms 19a through sealants 31 or battens 32, and they are borne with the posts 22 through a sleeper 33.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a formwork construction method for constructing beams and floors of buildings with reinforced concrete structures, and a formwork apparatus used therein.

[Conventional technology]

Conventionally, when constructing a beam for a reinforced concrete rigid frame structure, the beam reinforcing bars are often assembled first and a beam formwork is constructed to surround the outer periphery.

This is because the beam formwork that is generally used is one in which the beam bottom formwork is supported by shoring and the beam side formwork is tied together with separators.According to this, after the beam formwork is formed, the separator Because the reinforcing bar cages protrude, it is impossible to drop the reinforcing bar cages into the formwork, and it is time-consuming to tie the separators together, making it even more difficult to tie the separators together after placing the reinforcing bar cages This is due to problems such as the difficulty in dismantling the formwork.

Therefore, the applicant first proposed a beam formwork device as shown in FIG. 5 as Utility Model Application No. 178452/1982 (Kokoku Publication No. 19069/1981), and obtained the rights thereto.

This is built over the tops of a pair of telescopic supports 1, consisting of a temporary beam 2 with a horizontal U-shaped receiving part 5, and a beam bottom formwork 6 attached to the bottom 3 of the receiving part 5. The beam side formwork 7 is pivotally attached to both sides of the beam bottom formwork 6 using hinges or the like.

A telescopic fastener such as a turnbuckle 8 is provided between the upper part of the beam side formwork 7 and the side part of the receiving part 5, and the floor formwork 9 will be installed.

An auxiliary iron plate 10 is placed over the beam side formwork 7 and the floor formwork 9.

First, the column 1 is set in a contracted state below the beam construction position, and the turnbuckle 8 is operated to set the beam side formwork 7 in a predetermined position.

Next, the support column 1 is extended and the formwork device is set at a predetermined height.

Next, the auxiliary iron plate 10 is attached and the beam side formwork 7 and floor formwork 9 are attached.
Close the gaps between the two, then arrange reinforcing bars, and pour concrete for the floor and beams.

After the concrete has hardened, the turnbuckle 8 is operated to open the beam-side formwork 7 for peeling off, and the pillars 1 are lowered and the formwork device is lowered to the bottom of the beam to be moved and replaced.

In this way, according to the beam formwork apparatus shown in FIG. 5, the beam bottom formwork 6 and the beam side formwork 7 are restrained from the outside by the bottom of the receiving part 5 and the turnbuckle 8, so that the separator This eliminates the need for fastening, and even after the formwork is installed, reinforcing bar cages for beam reinforcement can be easily inserted into the formwork, and the formwork can be easily assembled and demolded.

[Problem to be solved by the invention]

By the way, in the formwork device shown in FIG.
The temporary beam 2 that forms the support column 1 and the temporary beam 2 take up a considerable width, and although it is possible to separate the support column 1 and the temporary beam 2 and replace them, it is difficult to move them as a unit because the entire structure becomes large.

In this way, if the temporary beam 2 is not wide enough, the upper end of the beam side formwork 7 on which the auxiliary steel plate 10 rests will be subject to a large load from floor reinforcement and concrete pouring, and both sides of the beam bottom formwork 6 will be There is a risk that the beam-side formwork 7 to which it is pivoted may tilt.

Such an inclination of the beam side formwork 7 not only deteriorates the construction accuracy of the beam itself, but also creates a gap between the auxiliary iron plate 10 and the upper end of the beam side formwork 7, from which concrete may leak.

The purpose of the present invention is to eliminate the disadvantages of the conventional example, to use a beam formwork with a U-shaped cross section in which the beam side formwork and the beam bottom formwork are hinged, and to attach a PC board or formwork to the upper end of the beam side formwork. Even when placing the end of the board, try to avoid applying loads to the beam side formwork as much as possible.
Another object of the present invention is to provide a formwork construction method and a formwork device that can improve workability by providing a wide working space on the sides of the beam formwork support.

[Means to solve the problem]

In order to achieve the above object, the present invention has a beam formwork with a U-shaped cross section in which the beam side formwork and the beam bottom formwork are hingedly connected on the upper truss of a beam formwork shoring structure incorporating support type telescopic columns. Install the frame and a support made of screw jacks with a large support at the upper end side by side, and attach the end of the PC board or formwork board to the upper end of the beam side formwork with a sealant or a crosspiece as necessary. The gist of this method is to place the support on the pillars, and then support the vicinity of the support with the pillars via a large support set in a large support, and after arranging the reinforcement, pour concrete for the beam and floor.

[Function] According to the present invention, the PC board or formwork board is supported near its end by a support made of a screw jack with a large support, so this support takes most of the load, and the beam side mold No large load is applied to the top of the frame.

Furthermore, since the supports are provided on the upper truss of the beam formwork alongside the beam formwork, both can be set at the same time, resulting in labor-saving work.

Furthermore, because of the presence of the pillars, there is no need to erect supports for supporting the PC boards or formwork boards in the immediate vicinity of the beam form shoring, and a large work space can be secured.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

First, the formwork device B used in the construction method of the present invention will be explained.

FIG. 1 is an overall side view showing an example of the formwork device 801, and FIG.
The figure is a side view of the main parts of the same as above, and numeral 11 in the figure is a beam form support incorporating a support type telescopic column 12.

This beam form support ■1 is constructed by arranging beam materials 13 and 13 parallel to the beam A to be constructed with a width slightly larger than the width of the beam A. The temporary support is beam material 1
3.13, the horizontal beams 14 are assembled at appropriate intervals below the beam members 13.13.

This horizontal beam 14 has a horizontal U-shape in which the left and right ends of the temporary support are slightly overhanging outside the intersection with the beam members 13.13, and the overhanging ends are raised at right angles to form a raised portion 14a. be.

The telescopic column 12 is composed of an upper column 12a that is an outer tube, a lower column 12b that is a slide pipe inserted into the upper column 12b, and a jack base 12c that is inserted into the lower end of the upper column 12a. The upper end of the support is connected to the beam 13 and the horizontal beam 14, and the lower end of the temporary support is connected to the lower beam 15 parallel to the beam 13 and the lower cross member 16 parallel to the horizontal beam 14, and as appropriate. 17.17'
The temporary support was placed between the beam 13 and the lower beam 15, or between the horizontal beam 14 and the lower horizontal beam 16, and the upper part of the beam form support ■1 was made into a light truss 18.

Reference numeral 19 in the figure is a beam formwork with a U-shaped cross section in which a beam side formwork 19a and a beam bottom formwork 19b are hinged together, using a metal form commonly used as formwork, and the beam bottom formwork 19b is used as a horizontal beam. 1
4, it is installed inside the horizontal beam 14.

As shown in FIG. 3, this beam formwork 19 includes beam side formwork 19a
and a face plate 20 made of a steel plate that is continuous inside the beam bottom formwork 19b.
Although the corner 19c is connected by the face plate 20 to form the hinge connection, it is also possible to use a normal hinge to form the hinge connection.

A retractable fastener such as a turnbuckle 21 is hung between the rising portion 14a of the horizontal beam 14 and the beam side formwork 19a,
In addition, on the upper surface of the beam formwork support 11, temporary supports 22 are attached to the horizontal beam 1 using screw jacks at appropriate intervals on the beam material 13.
4 is raised parallel to the raised part 14a and the beam side formwork 19a, and a large underwriter 23 is attached to the tip thereof.

Next, a construction method of the present invention using such a formwork device will be explained.

First, the column reinforcing bars are zigointed, a column formwork is set around the outer periphery, and column concrete is poured by pumping or packet casting to the bottom end of the beam of the column formwork to construct the column part.

Then, the formwork device B of the present invention is set between the pillars.

Next, a thin PC board 30 for synthetic flooring is laid, but this P
When laying CC32O, as shown in Figs. 1 and 2, its end is placed on the upper end of the beam side formwork 19a with a sealing material 31 and crosspieces 32 interposed as necessary, and the vicinity thereof is placed on the upper end of the beam side formwork 19a, and the vicinity thereof is placed on the upper end of the beam side formwork 19a. This is done by supporting the pillar 22 via a large support 33 set in a large support 23.

Further, other parts of the thin PC board 30 for synthetic flooring are supported by appropriately erecting supports.

From now on, this PCC32O can be used as a work scaffold.

Although not shown, prefabricated beam reinforcing bars are set inside the upper opening of the beam formwork 19 having a U-shaped cross section.

Then, after arranging the floor equipment embedded piping and arranging reinforcement on the floor on the thin PC board 30 for the synthetic floor, the beam/floor and panel zone concrete 41 are poured.

After the concrete 41 hardens, the turnbuckle 2
1 to open the beam-side formwork 19a for peeling and removal, lower the support 12, lower the formwork device B to the bottom of the beam, and move and replace it.

In addition, the formwork assembly WB is moved by replacing the jack base 12c with casters 38, but in order to move the demolded formwork apparatus to another floor, the new path 39 and the overhanging stage 40 are used as shown in FIG. The formwork device is moved to this overhanging stage 40, lifted up by a crane, and stored on another floor.

〔Effect of the invention〕

As described above, the formwork construction method and formwork apparatus of the present invention use a beam formwork with a U-shaped cross section in which the beam side formwork and the beam bottom formwork are hinged, and the upper end of the beam side formwork is Even when placing plates or formwork plate ends, it is important to avoid applying loads to the beam side formwork as much as possible, and to improve work efficiency by leaving a large work space on the side of the beam formwork support. It is possible.

[Brief explanation of drawings]

Fig. 1 is an overall side view showing an embodiment of the formwork construction method and formwork apparatus of the present invention, Fig. 2 is a side view of the main parts of the same, and Fig. 3 is a vertical sectional side view of the main parts of the beam formwork. , FIG. 4 is a side view when the formwork is replaced, and FIG. 5 is a side view showing a conventional example. 1...-Column 3...Bottom part 5...Receiving part 7...Beam side formwork 9...Floor formwork 11-...Beam formwork support 12a...Upper column 2... Temporary beam 4... Side part 6... Beam bottom formwork 8... Turnbuckle 10... Auxiliary iron plate 12... Support column 12b... Lower column 12c... Jacket base 14... Horizontal beam I5--Lower beam material 17, 17'...Brace 19--Beam form 19b...Beam bottom form 20--Face plate 22...Strut 30--PC board 31-- Sealing material 33...Oihiki 39...New road 41...Concrete 13...Temporary support is beam material 14a...Rising part 16...Lower horizontal member 18...Truss 19a...・Beam side formwork 19c... Corner 21... Turnbuckle 23... Large undercarriage 32... Pier 38... Caster 40... Overhanging stage

Claims (2)

[Claims] (1) A beam formwork with a U-shaped cross section in which the beam side formwork and the beam bottom formwork are hinged together on the upper truss of a beam formwork shoring system incorporating support type telescopic columns, and a large support at the upper end. Place the PC board or formwork board on the upper end of the beam side formwork with a sealing material or a crosspiece as necessary, and place the PC board or formwork board on the upper end of the beam side formwork with a sealing material or a crosspiece as necessary. A formwork construction method characterized by supporting the above-mentioned pillars via the set tensioners, and placing beams and floor concrete after reinforcing. (2) On the upper truss of the beam form shoring incorporating support type telescopic columns, the beam side formwork and the beam bottom formwork are hinged together, and the beam formwork has a U-shaped cross section, and a large support is placed on the upper end. A formwork device characterized by having screw jack supports installed side by side.