KR-102960957-B1 - Bracket Support Device and Early Formwork Removal Method for Slab Formwork Structure Using the Same

KR102960957B1KR 102960957 B1KR102960957 B1KR 102960957B1KR-102960957-B1

Abstract

The present invention relates to a method for early demolding of lower support members in a slab formwork structure comprising a plate, a joist member arranged horizontally below the plate, a yoke member arranged in a direction orthogonal to the lower part of the joist member, and a main support connected to the lower part of the yoke member to support a load from the ground, comprising: a step of confirming that concrete poured into the slab formwork structure has reached a preset early strength (S100); a step of connecting one or more truss brackets and sub-supports to the main support when the poured concrete has reached the preset early strength (S200); a step of distributing the slab load by adjusting the height of the sub-support so that the sub-support supports the plate at a position spaced apart from the main support (S300); and a step of lowering the main support from a normal support height to release the slab load applied to the main support and gradually transfer it to the sub-support (S400). The present invention relates to a method for early demolding of a slab formwork structure using a bracket support device, characterized by comprising the step (S500) of dismantling and demolding the yoke member supported and installed by the main support and the joist member supported by the yoke member; wherein, after the step S500, the height of the main support is readjusted and retained as a filler support during the curing period of the slab concrete.

Inventors

김재성
김영웅

Assignees

(주)대의엔지니어링

Dates

Publication Date: 20260507
Application Date: 20250807

Claims (16)

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A method for early demolding of lower support members in a slab formwork structure comprising a plate, a joist member arranged horizontally below the plate, a yoke member arranged in a direction perpendicular to the lower part of the joist member, and a main support coupled to the lower part of the yoke member to support a load from the ground, wherein A step (S100) of confirming that the concrete poured into the above-mentioned slab formwork structure reaches a preset early strength; When the poured concrete reaches a preset early strength, a step (S200) of connecting one or more truss brackets connected to a selected side of the main support and sub-supports connected vertically to the truss brackets and supporting a slab formwork at a position spaced apart from the main support; A step (S300) of distributing the slab load by adjusting the height of the sub-support so that the sub-support supports the plate at a position spaced apart from the main support; A step (S400) of lowering the main support from the normal support height to release the slab load applied to the main support and gradually transferring it to the sub-support; and The method includes the step (S500) of dismantling and demolding the yoke member supported and installed by the main support and the joist member supported by the yoke member; After the above S500 step, A method for early demolding of a slab formwork structure using a bracket support device, further comprising the step of readjusting the height of the main support and retaining it as a filler support during the curing period of the slab concrete.
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In Paragraph 8, After the above S500 step, A method for early demolding of a slab formwork structure using a bracket support device, characterized by dismantling and separating one or more sub-supports coupled to the main support and retaining the main support as a filler support during the curing period of the slab concrete.
In Paragraph 8, The above truss bracket is, A method for early demolding of a slab formwork structure using a bracket support device characterized by having two brackets provided and each being coupled to a symmetrical one side and the other side of the main support.
In Paragraph 8, The above main support is, Fastening rails protruding at regular intervals along the perimeter are provided, The above truss bracket is, A method for early demolding of a slab formwork structure using a bracket support device, characterized by comprising: a body having a truss structure; two or more fasteners installed spaced apart along a vertical direction on one side of the body and coupled so as to be detachably connected at a selected height of the fastening rail; and a mounting member provided on the other side of the body to which a sub-support is coupled so as to allow height adjustment of the sub-support.
In Paragraph 12, The above fastener is, A method for early demolding of a slab formwork structure using a bracket support device, characterized by comprising: a first clamp member fixedly installed on one side of the body and having a first bent end bent inwardly at an end facing the fastening rail; a second clamp member pin-coupled to the first clamp member and rotated, having a second bent end bent inwardly at an end facing the fastening rail and facing the first bent end; and a control bar that controls the rotation of the second clamp member to adjust the gap with the first clamp member.
In Paragraph 12, The above sub-support is, It includes a support tube having a cylindrical tube shape and having adjustment holes formed through it at regular intervals along the longitudinal direction, and a support plate coupled to the upper part of the support tube and in surface contact with the bottom surface of the slab formwork. The above mounting bracket is, A method for early demolding of a slab formwork structure using a bracket support device, characterized by comprising: a receiving tube in which the support tube is inserted and received and a fixing hole is formed through it, so that one of the adjustment holes of the inserted support tube is exposed through the fixing hole; and a fixing pin that is fastened to pass through the space between the fixing hole of the receiving tube and the adjustment hole of the support tube to fix the height of the inserted support tube.
In Paragraph 14, The above receiving tube is, An adjustment section of a certain length is provided along the longitudinal direction, screw threads are formed on the outer surface of the adjustment section, and within the adjustment section, the fixing hole is cut vertically to have an elongated hole shape. The above mounting bracket is, A method for early demolding of a slab formwork structure using a bracket support device, characterized by further including a mounting nut that is fastened to the threads of the receiving tube and moves up and down in the adjustment section through rotation, and supports and mounts both ends of a fixing pin exposed in the fixing hole to adjust the height of the supporting tube in the adjustment section using a screw jack method.
In Paragraph 14, The above main support and sub-support are, A method for early demolding of a slab formwork structure using a bracket support device, characterized by further including a receiving head that accommodates a horizontal member having a square timber structure and is selectively coupled to the upper part.

Description

Bracket Support Device and Early Formwork Removal Method for Slab Formwork Structure Using the Same The present invention relates to a bracket support device configured to enable early demolding of lower support members of a slab formwork structure, such as joists or yoke members, before securing the compressive strength of the slab concrete according to standard specifications, and a method for early demolding of a slab formwork structure using the same. A general slab formwork method mainly applies a method in which formwork panels such as plywood are supported by joists made of square timbers, round steel pipes, or square steel pipes, and then supported again by yoke members made of square timbers, while the lower part of the yoke members is supported by multiple supports (also called 'shoring') so that the slab load is transferred to the lower part. In this slab formwork method, the support is retained for a long period until the slab concrete approaches the design strength. However, the longer the removal of the support is delayed, the more subsequent processes such as burying pipes and electrical wiring or interior finishing are delayed, which prolongs the overall construction period. Additionally, as the support materials remain tied up on site, rental and storage costs also increase. Accordingly, conventionally, when constructing slabs, the slab formwork is supported using only some supports under conditions that satisfy design standards, and the remaining supports are removed and reused. In other words, under conditions that satisfy concrete design standards, it is acceptable to support the slab with only a few supports without slab formwork; however, conventionally, since there is no way to remove the lower support members of the slab formwork while leaving the supports in place, a small number of supports are used without removing the slab formwork. Meanwhile, there have also been attempts to distribute the load by installing additional auxiliary beams (yokes) or trusses on top of the supports to facilitate the early demolding process for slab formwork. However, since the yoke and truss are installed across the bottom of the slab, dismantling itself is cumbersome, and there is a problem that local deflection may occur, especially because the load in the center of the slab is still concentrated on the main support. FIG. 1 is a perspective view showing an apparatus of the present invention. FIG. 2 is a perspective view showing a truss bracket and a sub-support according to an embodiment of the present invention. FIG. 3 is a perspective view showing a fastener of a sub-support according to one embodiment of the present invention. FIG. 4 is a drawing showing a height adjustment method of a mounting member of a sub-support according to an embodiment of the present invention. FIGS. 5a to 5f are process-by-process drawings for explaining the method of the present invention. In describing the present invention, terms and words used in this specification and claims must be interpreted in a meaning and concept consistent with the technical spirit of the invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention. Preferred embodiments of the present invention will be described below with reference to the drawings. Referring to FIG. 1, the device of the present invention may include a main support (10), a truss bracket (20) coupled to the main support (10), and a sub-support (30) coupled to the truss bracket (20) and performing a support function in place of the main support (10) during the early demolding process of the slab formwork. The above main support (10) can support the load until the concrete poured for the construction of the slab hardens and has sufficient strength. For example, the above main support (10) is vertically connected to the lower part of the yoke member (3), which is a horizontal member constituting the slab formwork, and can support the load of the slab formwork as well as the concrete poured into the formwork. The above main support (10) may have a structure that allows for length adjustment so as to flexibly respond to changes in floor height. The above main support (10) may have a conventional multi-support structure as shown in FIG. 1, and may have two or more unit modules connected and extended in a vertical direction through bolt fastening, etc., so that the length is adjusted, or it may have a double tube structure consisting of an outer tube and an inner tube inserted and received inside the outer tube, and the insertion position of the inner tube is adjusted and fixed by a fixing device so that the total length is variable. The above truss bracket (20) can be detachably coupled to a selected side of the main support (10). The above truss bracket (20) is configured to connect the sub-support (30) described below to the main support (10), and can have a truss structure capable of stably distributing and