WO2009011516A2

WO2009011516A2 - Form with reinforcing bars, non-support form system and non-support construction method using the same

Info

Publication number: WO2009011516A2
Application number: PCT/KR2008/004065
Authority: WO
Inventors: Beom Jun Kim; Hyoung Ryeol Kim; Jun Yi; Gun Sac Kim; Waon Ho Yi
Original assignee: Beom Jun Kim; Hyoung Ryeol Kim; Jun Yi; Gun Sac Kim; Waon Ho Yi
Priority date: 2007-07-13
Filing date: 2008-07-10
Publication date: 2009-01-22
Also published as: WO2009011516A3; KR100875488B1

Abstract

Disclosed therein are a prefabricated form with reinforcing bars, in which tie bars perpendicularly joined to main bars are utilized as connectors for connection with a building frame form, which will be removed after concrete is poured, a non-support form system for allowing construction of beams or slabs without installing floor posts by using the prefabricated form with the reinforcing bars, and a non-support reinforced concrete construction method, which simplifies the general construction process since the floor posts are not installed. The non-support form system is to construct reinforced concrete beams or reinforced concrete slabs without using floor posts, and includes: a prefabricated form; and a temporary supporter suspensibly fixed beneath a building frame form of the prefabricated form.

Description

FORM WITH REINFORCING BARS, NON-SUPPORT FORM SYSTEM AND NON-SUPPORT CONSTRUCTION METHOD USING THE SAME

Technical Field

[1] The present invention relates to a prefabricated form with reinforcing bars, and a non-support form system and a non-support construction method using the same. More particularly, the present invention relates to a prefabricated form with reinforcing bars, in which tie bars perpendicularly joined to main bars are utilized as connectors for connection with a building frame form, which will be removed after concrete is poured, a non-support form system for allowing construction of beams or slabs without installing floor posts by using the prefabricated form with the reinforcing bars, and a non-support reinforced concrete construction method, which simplifies the general construction process since the floor posts are not installed. Background Art

[2] A reinforced concrete structure is a structure that reinforcing bars and concrete are integrated with each other, and is the most universal structure. A reinforce concrete construction is performed in a method comprising the steps of arranging reinforcing bars, installing a form, and pouring concrete. The reinforcing bars must be installed at uniform arrangement intervals and with uniform covering depth, and the form must be installed in such a way as not to be transformed by pouring pressure of concrete. However, such installations require various binding iron goods, such as spacers, form ties, and so on. The binding iron goods have several problems in that they must be installed in different work from the arrangement of the reinforcing bars since the binding iron goods are additional subsidiary materials different from the reinforcing bars and installation work is complicated since they have many components. Moreover, the binding iron goods have another problem in that the number of installation places is increased to sufficiently bind the forms since the binding iron goods are not materials to directly show a resisting force.

[3] In the meantime, in the reinforced concrete structure, in order to construct horizontal members as beams and slabs, floor posts must be installed. That is, the horizontal members are constructed through the steps of installing the forms in a state where it is supported by the floor posts, pouring and curing concrete, and removing the forms and the floor posts. However, the floor posts are very complicated in the installation work since workers have to inspect a supported state while directly adjusting the height thereof on the spot separately from the installation of the forms. Furthermore, since the floor posts can be removed after concrete is sufficiently cured, there is a limitation in working space on a floor where the floor posts are installed. Particularly, a multistory building is constructed in such a way that the workers carry construction materials, which were used on a lower floor, to a higher floor, but in this instance, it causes inconvenience in carrying the construction materials since members of the floor posts are big in size. As described above, the process to install the floor posts lowers a construction efficiency of the reinforced concrete construction.

[4] In order to solve the problem of the method of constructing the horizontal members using the floor posts, a prefabricated form with reinforcing bars, which were embedded in the horizontal members, was proposed, and hence, the prefabricated form with the reinforcing bars could support concrete self- weight and pouring pressure of without using any floor posts. Particularly, in case of a slab, a truss deck, in which reinforcing bars were assembled on an iron board, was proposed. However, the reinforcing bars of the conventional prefabricated form were designed in such a way that self- weight and pouring pressure of concrete while concrete is poured are considered larger than a resisting force required by a real concrete body, and hence, the conventional prefabricated form with the reinforcing bars has a problem in that an arrangement design of the reinforcing bars embedded in the concrete body, for instance, exceeds the resisting force required by the real concrete body because lattice bars are essentially arranged. Such a problem causes inconvenience in production for arrangement of the lattice bars and use of unnecessary materials. Particularly, truss decks for construction of slabs are permanently installed on a building without removing iron plates, and hence, they require rust-proofing and fireproof covering and cause an increase of construction costs since it is difficult to recycle steel plate forms. Disclosure of Invention Technical Problem

[5] Accordingly, the present invention has been made in an effort to solve the above- mentioned problems occurring in the prior arts.

[6] It is an object of the present invention to provide a prefabricated form, in which a building frame form removed after concrete is poured and reinforcing bars embedded in concrete are prefabricated, and in which tie bars perpendicularly joined to main bars are utilized as connectors for connection with the building frame form.

[7] Another object of the present invention is to provide a non-support form system for allowing construction of beams or slabs without using floor posts since a temporary supporter is mounted beneath the prefabricated form with the reinforcing bars.

[8] A further object of the present invention is to provide a non-support construction method, which simplifies a construction process using the non-support form system. Technical Solution

[9] To achieve the above objects, the present invention provides a prefabricated form with reinforcing bars, in which a building frame form removed after concrete is poured and reinforcing bars embedded in concrete are prefabricated to construct reinforced concrete frames of columns, beams, slabs and wall bodies, comprising: a building frame form having through holes formed in faces thereof; main bars arranged on one side of the building frame form 110 in a multistage in such a way as to be parallel with the building frame form, the main bars having a covering depth; tie bars each having a diameter larger than the through holes of the building frame form and a female screw hole formed at an end thereof, each of the tie bars being vertically arranged and abutting against the building frame form in such a way that the female screw hole corresponds to the through hole of the building frame form, each of the tie bars being perpendicularly joined to the main bars of the multistage; and tie bolts each fastened to the female screw hole of each of the tie bars on the other side of the building frame form after passing through the through hole of the building frame form, each of the tie bolts being mounted to support the building frame form.

[10] Furthermore, the present invention provides a non-support form system for constructing reinforced concrete beams or reinforced concrete slabs without using floor posts, comprising: a prefabricated form with reinforcing bars having a building frame form for constructing beams or slabs and main bars located inside or on the building frame form; and a temporary supporter suspensibly fixed beneath the building frame form of the prefabricated form, the temporary supporter being shorter than a main bars arrangement direction length of the prefabricated form and located at a central portion of the prefabricated form in such a way that both end parts of the prefabricated form protrude from the temporary supporter, wherein the prefabricated form is divided into the central part that the tie bolts are fastened to the tie bars after passing through the through holes of the building frame form, and the both end parts that support bars are arranged in such a way as to abut against the building frame form or protrude from the building frame form in a state where the support bars are perpendicularly joined to the main bars of the multistage, and wherein the temporary supporter is suspensibly fixed beneath the building frame form of the prefabricated form by a tie bolt located at the central part of the prefabricated form.

[11] Moreover, the present invention provides a method of constructing beams or slabs using reinforced concrete, comprising the steps of: (A) installing framed forms or precast frames for constructing columns or beams; (B) installing the non-support form system in such a way as to put support bars of both end parts of the prefabricated form on upper faces of the framed forms or the precast frames while putting the both end parts of the prefabricated form on upper faces of the framed forms or the precast frames; (C) pouring and curing concrete inside the framed forms or on the precast frames and on the building frame form of the prefabricated form in the non-support form system; and (D) Removing the framed forms and releasing the tie bolts of the prefabricated form in the non-support form system to thereby disassemble the building frame form of the prefabricated form with the reinforcing bars and the temporary supporter. Brief Description of the Drawings

[12] FIGS. 1 to 3 illustrate various embodiments of a prefabricated form with reinforcing bars according to the present invention, wherein FIG. 1 illustrates a prefabricated form with reinforcing bars for construction of columns and wall bodies, FIG. 2 illustrates a prefabricated form with reinforcing bars for construction of beams, and FIG. 3 illustrates a prefabricated form with reinforcing bars for construction of slabs.

[13] FIGS. 4 and 5 respectively illustrate the whole and a part of a non-support form system according to a preferred embodiment of the present invention.

[14] FIG. 6 illustrates a non-support form system according to another preferred embodiment of the present invention.

[15] FIGS. 7 and 8 respectively illustrate a non- support construction method using the non-support form system of FIG. 4 and using the non-support form system of FIG. 6.

[16] FIG. 9 illustrates a flow of stress for supporting concrete self- weight and pouring pressure in the non-support construction method.

[17] <Explanation of essential reference numerals in drawings>

[18] 100: prefabricated form with reinforcing bars

[19] 110: building frame form 120: main bar

[20] 130: distribution bar 140: tie bar

[21] 145: support bar

[22] 146: reinforcement bar [23] 150: tie bolt 200: temporary supporter

[24] 220: ¹^ -shaped connection plate

[25] C: central part of form with reinforcing bars

[26] E: both end parts of form with reinforcing bars

[27] F: framed form P: precast frame

Mode for the Invention

[28] Reference will be now made in detail to the preferred embodiment of the present invention with reference to the attached drawings.

[29]

[30] 1. Form with reinforcing bars

[31] FIGS. 1 to 3 illustrate various embodiments of a prefabricated form with reinforcing bars according to the present invention, wherein FIG. 1 illustrates a prefabricated form with reinforcing bars for construction of columns and wall bodies, FIG. 2 illustrates a prefabricated form with reinforcing bars for construction of beams, and FIG. 3 illustrates a prefabricated form with reinforcing bars for construction of slabs. In the prefabricated form 100 with reinforcing bars according to the present invention, a building frame form 110, which will be removed after concrete is poured, and reinforcing bars embedded in concrete are prefabricated to construct reinforced concrete frames of columns, beams, slabs and wall bodies. In the prefabricated form 100 with reinforcing bars, tie bars 140 perpendicularly joined to main bars 120 are utilized as connectors for connection with the building frame form 110.

[32] In detail, the prefabricated form 100 with reinforcing bars includes: a building frame form 110 having through holes 111 formed in faces thereof; main bars 120 arranged on one side of the building frame form 110 in a multistage in such a way as to be parallel with the building frame form 110 and having a covering depth; tie bars 140 each having a diameter larger than the through holes 111 of the building frame form and a female screw hole 141 formed at an end thereof, each of the tie bars 140 being vertically arranged and abutting against the building frame form 110 in such a way that the female screw hole 141 corresponds to the through hole 111 of the building frame form, each of the tie bars 140 being perpendicularly joined to the main bars 120 of the multistage; and tie bolts 150 each fastened to the female screw hole 141 of each of the tie bars on the other side of the building frame form 110 after passing through the through hole 111 of the building frame form, each of the tie bolts 150 being mounted to support the building frame form. Here, the tie bars 140 are manufactured by utilizing hoop bars, shear bars, and horizontal bars, which were arranged together with the main bars 120 when column bars, beam bars, slab bars and wall bars are arranged. Each of the tie bars 140 has the female screw hole 141 formed at an end of a general reinforcing bar in such a way that the tie bolt 150 can be fastened thereto.

[33] As described above, the present invention is characterized in that the tie bars 140 are used as connectors for tying the bars to the building frame form 110 by properly changing the reinforcing bars (hoop bars, horizontal bars, and shear bars), which were generally arranged during a process of arranging reinforcing bars, into the tie bars 140. As a result, when concrete is poured, concrete self- weight and pouring pressure applied to the building frame form 110 are finally supported by the main bars 120 through the tie bars 140. Accordingly, since only the tie bolts 150 are needed as tie iron goods to fix an installed state of the building frame form 110, the prefabricated form with reinforcing bars gets simple in structure and assembly of the building frame form and the reinforcing bars are simplified. Furthermore, since the tie bars 140 directly show a resisting force together with the main bars 120, the tie bars 140 can be tied to the building frame form more effectively and it causes a reduction of the number of installation places of the tie bars 140. As described above, in the present invention, the tie bars 140 are utilized as spacers for ensuring the covering depth of the main bars 120 and form ties for fixing a position of the building frame form 110.

[34] The prefabricated form 100 with the reinforcing bars according to the present invention further includes a protective cap 160 for covering an end of each of the tie bars, on which the female screw hole 141 is formed, in a state where the female screw hole 141 is exposed to the outside (See FIGS. 1 and 3). The protective cap 160 is provided to prevent corrosion of the tie bars 140 by preventing exposure of the ends of the tie bars 140 to the surface of a building frame completed when the building frame form 110 is removed after concrete is poured and cured. It is preferable that the protective cap is made of a plastic material.

[35] In addition, in the prefabricated form 100 with the reinforcing bars according to the present invention, each of the tie bolts 150 for tying the tie bars 140 to the building frame form 110 includes: a socket set screw 151 fastened to the female screw hole 141 of the tie bar after passing through the through hole 111 of the building frame form on the other side of the building frame form; and a nut 152 fastened to the socket set screw 151 on the other side of the building frame form 110 for supporting the building frame form 110 (See FIGS. 1 and 3). Since each of the tie bolts 150 can perfectly contact the building frame form 110 with the tie bar 140 and the nut 152 through a firm tightening of the nut 152 when the tie bar 140 and the socket set screw 151 are joined with each other in a state where the building frame form 110 is interposed between the tie bar 140 and the socket set screw 151, if there is a vibration during a lifting process of the prefabricated form 100 with the reinforcing bars or a concrete pouring process, it is restricted that the tie bolt 150 (including the socket set screw and the nut) is released and the tied state of the building frame form 110 and the tie bars 140 is removed.

[36] FIG. 1 illustrates the prefabricated form 100 with reinforcing bars for constructing columns and wall bodies, wherein FIG. l(a) shows an example of the prefabricated form with the reinforcing bars for constructing the columns, in which hoop bars surrounding the main bars 120 are transformed into the tie bars 140, and FIG. l(b) shows an example of the prefabricated form with the reinforcing bars for constructing the wall bodies, in which the horizontal bars for connecting the wall body main bars 120 (vertical bars) arranged in two lows are transformed into the tie bars 140. That is, as shown in FIG. l(a), in stead of the hoop bars surrounding the entire of the column main bars 120, the tie bars 140 are arranged at the location, in such a way as to abut against the column building frame form 110, which has both ends facing each other, while surrounding only a part of the column main bars 120. Alternatively, as shown in FIG. l(b), the tie bars 140 are arranged at the location, where the horizontal bars are arranged, in such a way as to abut against the wall body building frame form 110, which has both ends facing each other, while connecting the wall body main bars 120. Accordingly, the tie bars 140 can serve as tie iron goods (spacers, form ties, and so on) and as the hoop bars or the horizontal bars.

[37] FIG. 2 illustrates a prefabricated form 100 with reinforcing bars for constructing beams, which is completed by tightly connecting both sides of the beam building frame form 110, which are arranged oppositely to each other, using the tie bars 140. In this instance, it is preferable that the tie bars 140 are joined to beam lower bars 122 or hoop bars 124 to thereby ensure stability.

[38] FIG. 3 illustrates a prefabricated form 100 with reinforcing bars for constructing slabs, in which slab main bars 120 are constructed into two stages of upper bars 121 and lower bars 122 and the tie bars 140 are vertically connected and joined to the upper bars 121 and the lower bars 122 of the two stages. The main bars 120 of the two stages are arranged on the building frame form 110 in multiple lines in a state where they are prefabricated with the tie bars 140. It is preferable that distribution bars 130 are additionally arranged in such a way as to cross the main bars 120 since it may be difficult that only the one-way main bars 120 disperse stress. The distribution bars 130 are prefabricated bars including upper and lower bars 131 and 132 and web bars 133 for connecting and joining the upper and lower bars 131 and 132 with each other, and can be easily arranged when they are inserted and cross between the upper and lower bars 121 and 122 of the main bars 120 arranged in multiple lines. Moreover, in the prefabricated form with the reinforcing bars for constructing the slabs, while the tie bars 140 serve as shear bars, according to circumstances, if additional shear bars are needed, shear bars 123 for connecting only the upper and lower bars 121 and 122 of the main bars without regarding to the tie bars 140 can be provided. In FIG. 3(b), the shear bars 123 of the main bars and the web bars 133 of the distribution bars are straight bars. In case of the prefabricated form with the reinforcing bars completed by the above components, since it is difficult to sufficiently support concrete self- weight and pouring pressure, floor posts or temporary supporters, which will be described later, are needed on the spot. In FIG. 3(c), the shear bars 123 of the main bars and the web bars 133 of the distribution bars are lattice bars. In case of the prefabricated form with the reinforcing bars completed by the above components, since it is sufficient to support concrete self-weight and pouring pressure, there is no need to additionally mount the floor posts or temporary supporters.

[39]

[40] 2. Non-support form system

[41] FIGS. 4 to 6 illustrate a non-support form system according to the present invention, in which the non-support form system includes a prefabricated form 100 with reinforcing bars and a temporary supporter 200 for constructing beams or slabs. FIGS. 4 to 6 illustrate only the non-support form system for constructing the slabs, but it is natural that a non-support form system for constructing beams can be easily completed if a bar arrangement method of the building frame form is changed in such a manner as to conform to construction of the beams since the beams have the same horizontal members as the slabs.

[42] The prefabricated form 100 with the reinforcing bars for constructing the beams or slabs can be completed through the steps of preparing a beam or slab building frame form and arranging the main bars 120 inside or on the building frame form 110. As shown in FIG. 2, the prefabricated form 100 with the reinforcing bars for constructing the beams is completed in such a way as to arrange the beam main bars 120 and the tie bars 140 inside the beam building frame form 110. As shown in FIG. 3, the prefabricated form 100 with the reinforcing bars for constructing the slabs can be completed through the steps of arranging the slab main bars 120 into two stages of the upper and lower bars 121 and 122, connecting and joining the upper and lower bars 121 and 122 of the two stages with the tie bars 140, and tying the tie bars 140 and the slab building frame form 110 with the tie bolts 150. Of course, the distribution bars 130 can be provided to the prefabricated form 100 for constructing the slabs in such a way as to cross the main bars 120.

[43] In the meantime, the form 100 with the reinforcing bars to complete the non-support form system for constructing the beams or the slabs is divided into a central part (C) where the tie bolts 150 are fastened to the tie bars 140 after passing through the through holes 111 of the building frame form and both end parts (E) where support bars 145 are arranged in such a way as to abut on the form 110 or in such a way as to protrude from the form 110 in a state where the support bars 145 are perpendicularly joined to the main bars 120 of the multistage. Since both end parts (E) of the prefabricated form with the reinforcing bars are lifted on upper faces of framed forms (F) (column forms or beam forms) or precast frames (P) (precast columns or precast beams), it is necessary that there are no projections, such as tie bolts 150, on the bottoms of the both end parts of the building frame form 110 (See FIGS. 7 and 8), and hence, not the tie bars 140 but the support bars 145 are provided at the both end parts (E) of the prefabricated form 100 with the reinforcing bars. Since the tie bolts 150 are not fastened to the support bars 145, the building frame form 110 may not be located (See FIG. 6) or the through hole 111 of the building frame form may be omitted (See FIG. 4) on both end parts (E) of the prefabricated form 100. Additionally, the support bars 145 may not have the female screw holes 141 differently from the tie bars 140.

[44] Furthermore, in the present invention, since the prefabricated form 100 with the reinforcing bars is supported only by the temporary supporter 200 without any floor posts, there may occur a droop by self- weight and pouring pressure of concrete during a process of pouring concrete, and hence, it is preferable that the prefabricated form 100 with the reinforcing bars is convexly bent in advance to thereby sufficiently cope with the droop when concrete is poured.

[45] The temporary supporter 200 is fixed beneath the building frame form 110 in such a way as to be suspended. The temporary supporter 200 is shorter than a main bars arrangement direction length of the prefabricated form with the reinforcing bars and located at the central part (C) of the prefabricated form with the reinforcing bars in such a way as that the both end parts (E) of the prefabricated form project outwardly from the temporary supporter 200. Particularly, the temporary supporter 200 is fixed and suspended beneath the building frame form 110 of the prefabricated form at the central part (C) of the prefabricated form with the reinforcing bars via the tie bolts 150. Accordingly, when concrete is poured, self-weight and pouring pressure of concrete applied to the building frame form 110 is dispersed and transferred to the main bars 120 and the temporary supporter 200 through the tie bars 140 to thereby support not only the main bars 120 but also the temporary supporter 200, whereby an amount of reinforcing bars embedded in the real building frame can be optimized since arrangement of the main bars 120 can be designed according to a resisting force necessary for the building frame without regard to the concrete pouring pressure. That is, as shown in FIG. 2(b) or 3(b), even though the prefabricated form 100 with the reinforcing bars is a form that the lattice bars are not arranged, the non-support form system can be realized. As described above, since the present invention can complete the non-support form system using the form with the reinforcing bars, in which the lattice bars are not arranged, the present invention can reduce the amount of reinforcing bars embedded in the building frame by applying the main bars 120 and the distribution bars 130, which are more simple in manufacture than prior arts, and reduce construction material costs. Since the temporary supporter 200 is repeatedly used as temporary materials, it is not directly related with the construction material costs. [46] In the meantime, the concrete self- weight and pouring pressure dispersed to the main bars 120 and the temporary supporter 200 are transferred to both end parts of the main bars 120 and the temporary supporter 200. Since the temporary supporter 200 is arranged only at the central part (C) of the prefabricated form with the reinforcing bars, a load transferred to the both end parts of the temporary supporter 200 is also finally transferred to the both end parts (E) of the prefabricated form with the reinforcing bars (See FIG. 9). Accordingly, if the both end parts (E) of the prefabricated form with the reinforcing bars are mounted on stable support points (the framed forms or the precast frames), only the prefabricated form 100 with the reinforcing bars and the temporary supporter 200 without using the floor posts can support concrete self- weight and pouring pressure. However, since the temporary supporter 200 is not arranged and only the support bars 145 are arranged beneath the both end parts (E) of the prefabricated form while the load is finally transferred to the both end parts (E) of the prefabricated form, the both end parts (E) of the prefabricated form with the reinforcing bars are structurally instable, and hence, it is preferable that the both end parts (E) of the prefabricated form with the reinforcing bars must be reinforced by arranging additional reinforcement bars. FIGS. 4 to 6 illustrate an example that reinforcement bars 146 for connecting the tie bars 140 and the support bars 145 are mounted additionally and distribution bars 130 are arranged for reinforcement. In this instance, the distribution bars 130 includes upper and lower bars and web bars of a straight bar shape as shown in FIGS. 4(b) and 6(b), or includes upper and lower bars and web bars of a lattice bar shape as shown in FIGS. 4(c) and 6(c). Considering that the both end parts (E) of the prefabricated form with the reinforcing bars, which are joint parts between the prefabricated form with the reinforcing bars and the columns or the beams, are weak to a shear, the prefabricated form shown in FIGS. 4(c) and 6(c) is more preferable.

[47] FIGS. 4 and 5 show an example that prefabricated bars are used as the temporary supporter 200. The temporary supporter 200 includes two upper bars 211, one lower bar 212, and lattice bars 213 for connecting and joining the upper bars 211 and the lower bar 212 in a continuous waveform at both sides thereof. In this instance, the temporary supporter 200 further includes end plates 215 mounted at both longitudinal end portions thereof in such a way that ends of the two upper bars and the one lower bar are joined to the end plates 215. The end plates 215 serve to concentrate stress dispersed to the upper and lower bars 211 and 212.

[48] The prefabricated bar type temporary supporter 200 can be suspensibly fixed beneath the building frame form 110 of the prefabricated form with the reinforcing bars when a τ= -shaped connection plate 220 is mounted in such a way as to simultaneously surround the two upper bars 211 and the tie bolts 150 of the prefabricated form with the reinforcing bars are fastened to the tie bars 140 after passing through the τ= -shaped connection plate 220 from the bottom. Particularly, the temporary supporter 200 may be understood as a temporary material that the lattice bar, which were generally arranged on the building frame form and permanently embedded in the building frame, is arranged beneath the building frame form 110 without being embedded in the building frame.

[49] FIG. 6 shows an example that an H-shaped steel beam is used as the temporary supporter 200. The H-shaped steel beam type temporary supporter 200 can be suspensibly fixed beneath the building frame form 110 of the prefabricated form with the reinforcing bars when the tie bolts 150 of the prefabricated form with the reinforcing bars are fastened to the tie bars 140 after passing through an upper flange 230 of the H-shaped steel beam from the bottom. Such an installation method can be applied when steel materials of different kinds (channels, angles, and so on) having upper flanges using the temporary supporter 200 are adopted.

[50] [51] 3. Non-support reinforced concrete construction method

[52] FIGS. 7 and 8 respectively illustrate a non-support reinforced concrete construction method according to the present invention, respectively showing installed states of the non-support form system of FIG. 4 and the non-support form system of FIG. 6, and FIG. 9 illustrates a flow of stress for supporting concrete self- weight and pouring pressure in the non-support construction method. FIGS. 7 and 8 show the non-support reinforced concrete construction method for constructing slabs in detail, and the non- support reinforced concrete construction method according to the present invention can be also applied to construction of beams in the same way as the construction of the slabs. That is, the framed forms(F) and the precast frames (P) of FIGS. 7 and 8 may be taken as column forms and precast columns and the non-support form system may be taken as non-support beam form system. The non-support reinforced concrete construction method will be described by steps as follows.

[53]

[54] (A) Step of installing framed forms or precast frames

[55] Install the framed forms (F) for constructing columns or beams if a construction plan is established by a wet construction work, or install columns or beams using the precast frames (P) manufactured with steel frames or PCs if the construction plan is established by a dry construction work. FIGS. 7 and 8 respectively illustrate an example that the beam forms are installed using the framed forms (F) and an example that the steel beams are installed using the precast frames (P).

[56]

[57] (B) Step of installing non-support form system

[58] Put the both end parts (E) of the prefabricated form with the reinforcing bars on the upper feces of the framed forms (F) or the precast frames (P) after preparing the non- support form system. In this instance, the support bars 145 of the both end parts of the prefabricated form with the reinforcing bars must be located on the upper feces of the framed forms (F) or the precast frames (P), so that the framed forms (F) or the precast frames (P) can serve as stable support points of the non-support form system. That is, as shown in FIG. 9, when the loads (concrete self-weight and pouring pressure) of the non-support form system are finally transferred to the both end parts (E) of the prefabricated form with the reinforcing bars, the framed forms (F) or the precast frames (P) support the form with the reinforcing bars.

[59] Of course, in a state where the framed forms (F) are installed, the non-support form system adopts the form with the reinforcing bars, which has the building frame form 110 located at both end parts (E) thereof. In a state where the precast frames (P) are installed, the non-support form system adopts the prefabricated form with the reinforcing bars, which does not have the building frame form 110 located at both end parts (E) thereof.

[60]

[61] (C) Step of pouring concrete

[62] Pour and cure concrete inside the framed forms (F) or on the precast frames (P) and on the building frame form 110 in the non- support form system.

[63]

[64] (D) Step of removing form

[65] Remove the framed forms (F), and release the tie bolts 150 in the non-support form system to thereby disassemble the building frame form 110 and the temporary supporter 200 of the prefabricated form with the reinforcing bars, whereby concrete beams or concrete slabs can be completed without using the floor posts. The disassembled materials (the framed forms, and the building frame form and the temporary supporter of the prefabricated form with the reinforcing bars in the non-support form system) can be used continuously.

[66]

[67] While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It is to be appreciated that those skilled in the art can change or modify the embodiments without departing from the scope and spirit of the present invention.

[68]

Industrial Applicability

[69] As described above, the present invention provides the following effects.

[70] First, the present invention can greatly simplify components used as tie materials, reduce subsidiary material costs, and simplify an assembling work of the reinforcing bars and the building frame form since the tie bars perpendicularly joined to the main bars are utilized as connectors for connection with the building frame form, which is removed after concrete is poured.

[71] Second, the present invention can construct concrete beams and slabs without using the floor posts since the form system is completed in such a way that the temporary supporter is installed beneath the prefabricated form with the reinforcing bars to thereby increase a load-bearing force. Particularly, since the form system can disperse concrete self- weight and pouring pressure to the building frame bars located on the building frame form and to the temporary supporter located beneath the building frame form, the present invention can optimize an amount of the reinforcing bars embedded in the real building frame and reduce construction material costs since the arrangement of the reinforcing bars can be designed according to the necessary resisting force of the building frame.

[72] Third, the present invention can improve construction efficiency since the floor posts are not used and perform the construction rapidly since a space beneath the slab can be utilized as a working space even during the process of curing concrete.

Claims

[1] A prefabricated form with reinforcing bars, in which a building frame form (110) removed after concrete is poured and reinforcing bars embedded in concrete are prefabricated to construct reinforced concrete frames of columns, beams, slabs and wall bodies, the prefabricated form with reinforcing bars comprising: a building frame form (110) having through holes (111) formed in faces thereof; main bars (120) arranged on one side of the building frame form (110) in a multistage in such a way as to be parallel with the building frame form (110), the main bars (120) having a covering depth; tie bars (140) each having a diameter larger than the through holes (111) of the building frame form and a female screw hole (141) formed at an end thereof each of the tie bars (140) being vertically arranged and abutting against the building frame form (110) in such a way that the female screw hole (141) corresponds to the through hole (111) of the building frame form, each of the tie bars (140) being perpendicularly joined to the main bars (120) of the multistage; and tie bolts (150) each fastened to the female screw hole 141 of each of the tie bars on the other side of the building frame form (110) after passing through the through hole (111) of the building frame form, each of the tie bolts (150) being mounted to support the building frame form.

[2] The prefabricated form with the reinforcing bars according to claim 1, further comprising: a protective cap (160) for covering an end of each of the tie bars, on which the female screw hole (141) of the tie bar is formed, in a state where the female screw hole (141) is exposed to the outside.

[3] The prefabricated form with the reinforcing bars according to claim 1, wherein each of the tie bolts 150 includes: a socket set screw (151) fastened to the female screw hole (141) of each of the tie bars after passing through the through hole (111) of the building frame form on the other side of the building frame form; and a nut (152) fastened to the socket set screw (151) on the other side of the building frame form (110) for supporting the building frame form (110).

[4] The prefabricated form with the reinforcing bars according to one of claims 1 to

3, wherein the building frame form (110) is a building frame form for con- structing slabs, wherein each of the main bars (120) comprises an upper bar (121) and a lower bar (122) arranged in two stages, and the upper and lower bars (121; 122) of the two stages are arranged in multiple lines in a state where they are connected and joined by the tie bars (140), and wherein distribution bars (130) are arranged in such a way as to g) between the upper and lower bars (121; 122) of the main bars arranged in the multiple lines, the distribution bars (130) comprising upper and lower bars (131; 132) and web bars (133) for connecting and joining the upper and lower bars.

[5] A non-support form system for constructing reinforced concrete beams or reinforced concrete slabs without using floor posts, the non-support form system comprising: a prefabricated form (100) with reinforcing bars according to claim 1, the prefabricated form (100) having a building frame form (110) for constructing beams or slabs and main bars (120) located inside or on the building frame form (110); and a temporary supporter (200) suspensibly fixed beneath the building frame form (110) of the prefabricated form, the temporary supporter (200) being shorter than a main bars arrangement direction length of the prefabricated form and located at a central portion (C) of the prefabricated form in such a way that both end parts (E) of the prefabricated form protrude from the temporary supporter (200), wherein the prefabricated form (100) is divided into the central part (C) that the tie bolts (150) are fastened to the tie bars (140) after passing through the through holes (111) of the building frame form, and the both end parts (E) that support bars (145) are arranged in such a way as to abut against the building frame form (110) or protrude from the building frame form (110) in a state where the support bars (145) are perpendicularly joined to the main bars (120) of the multistage, and wherein the temporary supporter (200) is suspensibly fixed beneath the building frame form (110) of the prefabricated form by a tie bolt (150) located at the central part (C) of the prefabricated form.

[6] The non-support form system according to claim 5, wherein the prefabricated form (100) further comprises reinforcement bars (146) for connecting the tie bars (140) and the support bars (145) to the both end parts (E).

[7] The non-support form system according to claim 5, wherein the temporary supporter (200) comprises: two upper bars (211), one lower bar (212), and a lattice bar (213) for connecting and joining the upper bars (211) and the lower bar (212) in a continuous waveform at both sides thereof and wherein a τ= -shaped connection plate (220) is mounted in such a way as to simultaneously surround the two upper bars (211), and then, the tie bolts (150) of the prefabricated form are fastened to the tie bars (140) of the prefabricated form after passing through the τ= -shaped connection plate (220), so that the temporary supporter (200) can be suspensibly fixed beneath the building frame form (110) of the prefabricated form with the reinforcing bars.

[8] The non-support form system according to claim 7, wherein the temporary supporter (200) further comprises end plates (215) mounted at both longitudinal end portions thereof in such a way that ends of the two upper bars and the one lower bar are joined to the end plates 215.

[9] The non-support form system according to claim 5, wherein the temporary supporter (200) is made of a steel material having an upper flange (230), and wherein the tie bolts (150) of the prefabricated form are fastened to the tie bars (140) of the prefabricated form after passing through the upper flange (230) of the steel material, so that the temporary supporter (200) can be suspensibly fixed beneath the building frame form (110) of the prefabricated form with the reinforcing bars.

[10] A method of constructing beams or slabs using reinforced concrete, the method comprising the steps of:

(A) installing framed forms (F) or precast frames (P) for constructing columns or beams;

(B) installing the non-support form system according to one of claims 5 to 9 in such a way as to put support bars (145) of both end parts (E) of the prefabricated form on upper faces of the framed forms (F) or the precast frames (P) while putting the both end parts (E) of the prefabricated form on upper faces of the framed forms (F) or the precast frames (P);

(C) pouring and curing concrete inside the framed forms (F) or on the precast frames (P) and on the building frame form (110) of the prefabricated form in the non-support form system; and

(D) removing the framed forms (F) and releasing the tie bolts (150) of the prefabricated form in the non-support form system to thereby disassemble the building frame form (110) of the prefabricated form with the reinforcing bars and the temporary supporter (200).