KR101763162B1 - The interference cushioning device between cross beam and form for pre-stressed concrete girder - Google Patents
The interference cushioning device between cross beam and form for pre-stressed concrete girder Download PDFInfo
- Publication number
- KR101763162B1 KR101763162B1 KR1020150170560A KR20150170560A KR101763162B1 KR 101763162 B1 KR101763162 B1 KR 101763162B1 KR 1020150170560 A KR1020150170560 A KR 1020150170560A KR 20150170560 A KR20150170560 A KR 20150170560A KR 101763162 B1 KR101763162 B1 KR 101763162B1
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- South Korea
- Prior art keywords
- steel
- block
- psc girder
- interference
- formwork
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/04—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for lintels, beams, or transoms to be encased separately; Special tying or clamping means therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
- E04C3/26—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members prestressed
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties
Abstract
The present invention relates to a device for mitigating interference between a steel formwork for a PSC girder and a crossbeam, which can not only guide and support the PC steel before and after the concrete is poured, but also reduce the interference between the formwork and the PC steel will be.
For this purpose, the present invention relates to a device for mitigating interference between a steel formwork for a PSC girder and a crossbeam, comprising: a steel formwork for a PSC girder and a steel formwork for a PC, A plurality of block out holes forming a spacing space for alleviating interference between steel materials, detachably assembled or separated in each of the block out holes, assembled in each of the block out holes, A number of block-out brackets for guiding and supporting PC steels in each block outhole while covering and securing spacing for separating the steel formwork for PSC girders and PC steels apart from each block-out hole when the formwork is demolded , It is possible to reduce the interference between the PC steel and the formwork when the steel formwork is dismantled, so that the PSC girder is easy and convenient It can be prepared and be able to improve the durability of the mold.
Description
BACKGROUND OF THE
Generally, a girder is also called a beam. It is an upper structure that supports the upper slab of a bridge by being placed between a pier and a bridge between bridges or overpasses. It is composed of an upper flange and an I- A prestressed concrete (PSC) material made of a body of a cross section and usually manufactured in a state in which a tension material is formed therein is used.
PSC is a compressive stress applied to compensate tensile stress in concrete. By fixing PC steel (PC steel wire, PC bar steel, etc.) to concrete while tensioning it, it has a disadvantage of reinforced concrete structure And the use of PS steel has been actively developed and various construction methods have been developed so that the construction of the PSC structure is widely performed.
The PSC girder is prefabricated at the site adjacent to the site of the factory or the bridge, and the first tenon is tensed and then transported to the site. The PSC girder is mounted on a temporary support installed on the top of the pier using a crane.
Since the mold for PSC girder is very expensive equipment made of steel, once manufactured mold is reused continuously, the production cost of PSC girder can be reduced as the number of reuse is increased. Therefore, efficient construction of PSC girder formwork And recycling management are considered to be very important.
However, since the PSC girder is susceptible to tensile stress and PC steels of longitudinal beams and transverse beams are embedded therein, through holes for penetrating PC steels must be formed in steel formwork for PSC girders. However, Hole is an obstacle to the recycling of the steel formwork for the PSC girder. Therefore, in order to recycle the steel formwork for the PSC girder, it is necessary to fill up the existing through holes existing in the steel formwork according to the position of the PC steels of the existing PSC girder, And the new through-holes are formed again according to the position of the steel materials.
However, in order to recycle the steel formwork for the PSC girder, filling the existing through hole and forming the through hole again at the new position according to the position of the new PC steels finally caused the durability of the form to deteriorate.
Conventionally, in order to prevent the durability of the steel formwork for the PSC girder from being lowered due to the reinforcing bar interference, the
However, this conventional method can reduce the interference of the reinforcing bars at the time of installing the
In this connection, Korean Patent Registration No. 10-1321388 (registered on Oct. 17, 2013) discloses a method of manufacturing a prestressed concrete girder for a prestressed concrete girder which is easy to manufacture a prestressed concrete girder by dismountably attaching a detachable bracket to a steel formwork body, Is known.
According to
However, in the above-described known technique, a plurality of coupling bolts are used separately when the attachment / detachment bracket is installed or disassembled into the steel mold body. Therefore, it is troublesome to tighten or loosen the coupling bolts, It is necessary to fasten the detachment bracket to the steel mold body by tightening the engaging bolt from the outside of the detachment bracket in a state in which a separate flat support for supporting the PC steel is inserted inside the fixing piece formed at the center of the detachment bracket, The disassembly bracket must be detached from the steel mold body by disengaging the engaging bolt after the disassembly member is detached from the fixing piece portion at the center of the disassembly bracket first, and thus the operation is very troublesome and inconvenient.
Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for guiding and supporting PC steels before and after concrete pouring, The block-out bracket is detachably attached to the steel formwork for the PSC girder, thereby making it possible to easily and conveniently manufacture the PSC girder by reducing the interference between the PC steel and the formwork when the steel formwork is dismantled and the prestressed concrete And an apparatus for mitigating interference between a steel beam for a girder and a cross beam.
According to an aspect of the present invention, there is provided an apparatus for mitigating interference between a steel formwork for a PSC girder and a cross beam, the apparatus comprising: a steel frame for a PSC girder, A plurality of block out holes forming a spacing space for relieving interference between the steel formwork for the PSC girder and the PC steel, and a plurality of block out holes, which are detachably assembled or separated from the respective block out holes, It is designed to guide and support the PC steel in each block out hole while covering each block out hole before and after pouring. It is separated from each block out hole at the time of form demolition to mitigate the interference between steel formwork for PSC girder and PC steel. Interference between a steel formwork for a PSC girder and a crossbeam, including a plurality of blockout brackets securing spacing spaces Cosmetic chiyida.
In the apparatus for mitigating interference between a steel formwork for a PSC girder and a cross beam according to an embodiment of the present invention, each block out bracket has a shape and size corresponding to each block out hole of a steel formwork for a PSC girder, A block-out closing portion formed at the center of the body of the bracket so as to cover the block-out hole, a horizontal flange portion formed horizontally at the edge of the block-out closing portion and formed as a single structure so as to have a height difference from the block- And a plurality of PC steel through holes formed at a central portion of the out-closing portion and capable of inserting and disassembling the PC steels through the rubber packing members, respectively.
According to the present invention, a block-out is formed in a steel formwork for a PSC girder and a block-out bracket is detachably provided in the block-out area, so that the block-out space can be simply It is possible to cover and support the PC steel in place and to secure sufficient space for separation between the steel formwork for the PSC girder and the PC steel through the detachment of the block-out bracket when the formwork is demolded, It is possible to easily and conveniently manufacture the PSC girder by reducing the interference between the PC steel and the formwork when the steel formwork is dismantled, and the durability of the formwork can be improved.
1 is a cross-sectional view illustrating a conventional cross beam support apparatus for a steel formwork for a PSC girder.
2 is a cross-sectional view of an interference mitigation apparatus between a steel formwork for a PSC girder and a cross beam according to an embodiment of the present invention.
3 (a) to 3 (d) are front views showing a modification of the block-out bracket of FIG.
FIG. 4 is a front view illustrating a state in which each block-out bracket variant of FIG. 3 is installed in a steel mold for a PSC girder.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the overall structure and operation of an apparatus for mitigating interference between a steel formwork for a PSC girder and a cross beam according to the present invention will be described in detail with reference to the accompanying drawings.
It is to be understood that the words or words used in the present specification and claims are not to be construed in a conventional or dictionary sense and that the inventor can properly define the concept of a term in order to describe its invention in the best possible way And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention. Therefore, it should be understood that the embodiments described herein and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and that various equivalents and modifications may be substituted for them at the time of the present application shall.
2 is a cross-sectional view of a device for mitigating interference between a steel formwork for a PSC girder and a cross beam according to an embodiment of the present invention. Figs. 3 (a) to 3 (d) And FIG. 4 is a front view illustrating a state in which each block-out bracket variant of FIG. 3 is installed on a steel mold for a PSC girder. As illustrated in FIGS. 2 and 3 (a) to 3 (d) A plurality of block out
A plurality of block-out
The plurality of block out
The block-out
The
The plurality of PC steel through
The block out
The detailed operation of the apparatus for reducing the interference between the steel formwork for the PSC girder and the cross beam according to the present invention will be described as follows.
First, a plurality of block-out
Next, the block-out
When the assembly is performed, the
In this assembled state, each of the block-out
Finally, at the time of form demolding, the cylindrical
Accordingly, the present invention can easily cover the block-out area of the mold for the PSC girder which is formed for placing the PC steel in the cross direction on the PSC girder, but can also fix the PC steel material before the concrete is poured, It is possible to securely hold both ends of the steel material and to secure sufficient space to mitigate the interference between the formwork and the PC steel in case of deformation of the formwork. Therefore, the interference between the PC steel material and the formwork can be relieved during the steel formwork disassembly, Can be easily and conveniently manufactured and the durability of the form can be improved.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Modification is possible. Accordingly, it is intended that the scope of the invention be defined by the claims appended hereto, and that all equivalent or equivalent variations thereof fall within the scope of the present invention.
10: Steel mold for PSC girder 11: Block-out hole
12: bolt connecting hole 20: PC steel
30:
100: Block-out bracket 110: Block-out-
120:
121: bolt assembler 130: PC steel through hole
Claims (6)
The PSC girder is provided at a predetermined distance from the steel mold for the PSC girder for the placement of the PC steel 20 in the cross direction of the PSC girder and the interference between the steel mold for the PSC girder 10 and the PC steel 20 A plurality of block-out holes 11 forming a spacing space for the plurality of block-out holes 11;
The block out holes 11 are detachably assembled to or separated from the respective block out holes 11 and are assembled in the respective block out holes 11 to cover the respective block out holes 11 before and after the concrete is inserted, The PC steel member 20 is guided and supported in a predetermined position in the block 11 and is separated from each block out hole 11 when the form is demolded so as to reduce the interference between the steel mold 10 for the PSC girder and the PC steel 20. [ And a plurality of block-out brackets (100) for securing a spacing space,
The block-out bracket (100)
The block-out holes 11 are formed in a shape corresponding to the respective block-out holes 11 of the steel mold for a PSC girder 10 and are formed in the central portion of the bracket so as to cover each of the block- (110);
A horizontal flange part 120 horizontally provided at an edge of the block-out closure part 110 and having a height difference from the block-out closure part 110; And
A plurality of PC steel through holes 130 formed at a central portion of the blockout closing portion 110 and capable of inserting and disassembling the rubber packing member 30 and the PC steel 20,
The block-out bracket (100)
An end portion 120a having a height difference between the block-out closing portion 110 and the horizontal flange portion 120 is inserted into or detached from each block-out hole 11 of the steel mold for a PSC girder 10, (10) for the PSC girder. The apparatus for mitigating interference between a steel formwork for a prestressed concrete girder and a cross beam.
A plurality of bolt assemblies 121 for coupling at least two bolts are formed in the horizontal flange portion 120 and the bolt assembly holes 121 are formed around the respective block out holes 11 of the steel mold for a PSC girder Is formed with a bolt coupling hole (12) corresponding to the bolt hole (12) and is assembled or separated with the steel mold for a PSC girder (10) by bolt connection through the bolt fitting hole (121) An apparatus for interference mitigation between a steel form for a prestressed concrete girder and a cross beam.
And is formed along the periphery of the block-out closure part (110) so as to be entirely formed around the periphery of the block-out closure part (110).
And the PC steel member (20) is inserted and disassembled through the rubber packing member (30). The apparatus for mitigating interference between a steel formwork for a prestressed concrete girder and a cross beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150170560A KR101763162B1 (en) | 2015-12-02 | 2015-12-02 | The interference cushioning device between cross beam and form for pre-stressed concrete girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150170560A KR101763162B1 (en) | 2015-12-02 | 2015-12-02 | The interference cushioning device between cross beam and form for pre-stressed concrete girder |
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| Publication Number | Publication Date |
|---|---|
| KR20170064734A KR20170064734A (en) | 2017-06-12 |
| KR101763162B1 true KR101763162B1 (en) | 2017-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020150170560A KR101763162B1 (en) | 2015-12-02 | 2015-12-02 | The interference cushioning device between cross beam and form for pre-stressed concrete girder |
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| CN109469232A (en) * | 2018-11-07 | 2019-03-15 | 中建四局第建筑工程有限公司 | A kind of method for obligating and device of the floor reserved steel bar for climbing formwork for construction |
| CN114775450B (en) * | 2022-06-20 | 2022-09-09 | 山西临汾市政工程集团股份有限公司 | Building auxiliary template for steel box girder |
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