KR20070017873A - Mold assembly, composite crossbeam and construction method using the same - Google Patents

Abstract

The present invention includes a rectangular bottom having a length corresponding to the length of the beam structure to be constructed, and a pair of side walls integrally formed side by side on both sides of the floor, the space to be injected concrete by the floor and side walls Formwork body forming; A support member that contacts the bottom surface of the form body to support the form body; A fastening bolt having a screw end connected to the support member and the bottom of the form body in order to fix the support member to the formwork to protrude into the form inner space; It discloses a formwork assembly and a composite steel beam and a building construction method using the same; and a buried nut coupled to surround all of the screw end of the protruding fastening bolt.

Formwork, H-beam, beam

Description

Form assembly, composite crossbeam and construction method using the same

1 to 3 are cross-sectional views showing a slab structure according to the prior art.

4 is a cross-sectional view showing a schematic configuration of a formwork assembly according to a preferred embodiment of the present invention.

5 is a flow chart schematically showing a building construction method using a formwork assembly according to a preferred embodiment of the present invention.

6 is a view for explaining a state in which reinforcing bars are arranged in the H-beam in the building construction method according to a preferred embodiment of the present invention.

FIG. 7 is a schematic cross-sectional view taken along the line VII-VII ′ of FIG. 6.

8 is a view for explaining a state in which the formwork assembly is installed in the H-beam in the building construction method according to an embodiment of the present invention.

FIG. 9 is a schematic cross-sectional view taken along the line IX-IX 'of FIG. 8.

10 is a cross-sectional view showing an example of constructing a slab structure using a formwork assembly according to a preferred embodiment of the present invention.

TECHNICAL FIELD The present invention relates to a formwork assembly, and more particularly, to an improved formwork assembly that is easy to install and demould while simultaneously placing concrete. The present invention also relates to a composite steel beam employing the formwork assembly as described above and a building construction method using them.

In general, H-beams are widely used to support slabs, which are floors or ceilings of each floor of a building. That is, as shown in Figure 1, the H-shaped steel beam 12 and the slab 11 forms a slab structure (10).

On the other hand, the height of each floor of the building is the height of the interior space and the height of the slab structure (10). That is, as the height of the slab structure 10 is reduced, the height of each layer may be reduced. Therefore, even if the building of the same number of floors, as the height of the slab structure 10 is smaller, the height of the floor is smaller, the construction cost is reduced.

The height H of the slab structure 10 is obtained by adding the height H1 of the H-shaped steel beam 12 and the height H2 of the slab 11. When the height H1 of the H-shaped steel beam 12 or the height H2 of the slab 11 is reduced in order to reduce the height H of the slab structure 10, the supporting force or the bending resistance of the slab structure 10 becomes weak. There is a problem that affects the safety of the structure. Here, unexplained reference numeral 11a is a reinforcing bar reinforcement to the slab 11.

In addition, if the size of the H-beams 12 is reduced in order to reduce the height H of the slab structure 10, the cross-sectional area of the H-beams is also reduced, which is vulnerable to compressive and bending stresses acting in the longitudinal direction. There is a problem.

In order to solve this problem, as shown in FIG. 2, the deck plate 14 having the groove 14a corresponding to the upper flange 12a of the H-beam 12 is provided in the H-beam 12. After that, a method of manufacturing the slab structure 15 by pouring concrete has been proposed.

The slab structure 15 has an advantage that the height is reduced by the depth of the groove (14a). However, while the slab structure 15 is effective for the stress acting in the direction A perpendicular to the slab 13, the groove 14a is not effective for the stress acting in the direction B parallel to the slab 13. Since the thickness of the slab 13 is thin, there is a disadvantage that the shear stress and the bending stress are largely concentrated and also susceptible to the compressive force.

3 is a cross-sectional view showing a slab structure 19 including a cradle 16 welded to the web 12b of the H-shaped steel beam 12 and a deck plate 17 installed on the cradle 16. That is, the slab which welds the cradle 16 to the web 12b and installs the deck plate 17 on the cradle 16 to cast concrete so that a predetermined portion of the H-beam 12 is embedded in the concrete. It is a structure.

The slab structure 19 has an advantage that it is structurally safe compared to the slab structure of FIG. However, the process of welding the cradle 16 to the web 12b has to be additionally performed, and if the welding portions of the cradle 16 and the web 12b are not firm, there is a problem that seriously affects the safety of the structure. .

In addition, the slab structures are vulnerable to fire because the H-beam is exposed to the outside. That is, the high heat due to the fire is transmitted to the H-shaped steel as it may cause a problem that the H-shaped steel is deformed. To prevent this, the exposed H-beams must be treated with a separate fireproof coating.

On the other hand, in the conventional beam construction process, the H-beams forming the skeleton of the beam is installed, the formwork surrounding it is installed, the deck plate, etc. are mounted thereon, and then the beam and slab is poured. The formwork should serve to support the slab pour deck plate together with the formwork surrounding the H-shaped steel at the same time, so that the lower portion must be stably supported by a support such as a club. Therefore, the space under the formwork is filled with supporting structures such as clubbing, so it is difficult to secure a working space. In addition, because the structure of the formwork is complicated, it takes a lot of time and effort to install and dismantle it, there is a problem that the disassembled formwork can not be recycled again.

The present invention has been made in view of the above, it is to provide a formwork assembly that can be easily installed and dismantled, and can be installed without a support structure, such as clubs.

Still another object of the present invention is to provide a composite steel beam which can effectively reduce the height of the floor without affecting the safety of the structure by using the formwork assembly as described above.

Still another object of the present invention is to provide a method for constructing a building using the formwork assembly and the composite beam.

In order to achieve the above object, the formwork assembly according to the present invention includes a rectangular bottom having a length corresponding to the length of the beam structure to be constructed, and a pair of side walls integrally formed side by side on both sides of the bottom, A formwork body forming a space into which concrete is to be injected by the floor and the sidewalls; A support member that contacts the bottom surface of the form body to support the form body; A fastening bolt having a screw end connected to the support member and the bottom of the form body in order to fix the support member to the formwork to protrude into the form inner space; And a buried nut coupled to surround all of the screw ends of the protruding fastening bolts.

Here, the support member may be a steel pipe coupled to be spaced apart at a predetermined interval across the bottom surface of the form body in the transverse direction.

The apparatus further includes a deck plate support provided at an edge of the sidewall upper end of the form body.

Preferably, the deck plate support, the coupling portion coupled in contact with the upper edge of the formwork sidewall; And a support extending horizontally from the coupling portion.

More preferably, the deck plate support is fixed by a fastening bolt penetrating through the coupling hole and the side wall formed in the coupling portion, and a buried nut that surrounds the screw end of the fastening bolt to block contact with concrete.

More preferably, the support portion is formed with a coupling hole for engagement with the deck plate placed thereon.

The present invention may further include a lateral reinforcement member installed to connect and support the side walls of the form body.

Preferably, the lateral reinforcement member, both ends of the threaded reinforcing bar is fixed by a nut after passing through the side wall of the form body.

According to another aspect of the invention, (a) connecting the H-beam for beam construction to the section steel to be a pillar; (b) reinforcing the reinforcing bars constituting the beam around the H-beam; (c) a form body comprising a rectangular bottom having a length corresponding to the length of the beam and a pair of side walls integrally formed side by side on both sides of the bottom, and the form body in contact with the bottom surface of the form body; A supporting member for supporting the fastening bolt, the fastening bolt of the screw end of which is sequentially penetrated through the supporting member and the bottom of the formwork body to protrude into the form inner space to fix the supporting member to the formwork, and the screw of the protruding fastening bolt Suspending the formwork assembly to the H-shaped steel including a buried nut coupled to surround all of the ends; (d) mounting a deck plate over the formwork assembly; (e) injecting and curing concrete into the formwork assembly and the deck plate; And (f) releasing the formwork assembly by releasing the fastening bolts so that the embedding nut remains embedded in concrete and is provided with a building construction method.

Preferably, in the step (c), the form assembly is installed by a connecting member, one end of which is fixed to the buried nut and the other end of which is fixed to the lower flange of the H-beam.

Preferably, in step (c), the formwork assembly is installed such that the upper end of the side wall is located below the upper flange of the H-beam.

More preferably, the step (c) further comprises the step of connecting and supporting the side walls of the formwork body by a lateral reinforcing member.

Preferably, in step (d), the deck plate is mounted at an end thereof on the support of the deck plate support.

Preferably, the reinforcing steel reinforcement in the step (b) wraps the lower flange of the H-beams and both ends thereof are fixed at a predetermined interval along the longitudinal direction of the H-beams so that both ends of the H-beams abuts and fixed A plurality of installed stub bars; And a plurality of first tensile / compression bars arranged in the longitudinal direction of the H-beams on the stirrup reinforcing bars.

More preferably, the reinforcing bar is a plurality of mounting members whose one end is fixed to the upper edge of both sides of the stirrup reinforcement, the other end is formed to extend outward in both directions; And at least one second tensile / compression reinforcing bar fixed in the longitudinal direction to the mounting member.

According to the construction method of the present invention, the step (d) further includes the step of reinforcing the reinforcing bar in the area where the slab is formed.

Reinforcing bars are arranged in the area where the slab is formed, the support reinforcing bars are respectively provided on both sides of the H-shaped steel; And connecting bars installed across the H-beams to be adjacent to the supporting bars.

According to another aspect of the invention, the H-shaped steel consisting of an upper flange, a lower flange and a web connecting the upper and lower flanges with each other; Reinforcing bars arranged around the H-shaped steel; A rectangular floor having a length corresponding to the length of the beam structure to be constructed, and a pair of side walls integrally formed side by side on both sides of the floor, the formwork forming a space into which concrete is to be injected by the floor and the side walls; main body; A support member that contacts the bottom surface of the form body to support the form body; A fastening bolt having a screw end connected to the support member and the bottom of the form body in order to fix the support member to the formwork to protrude into the form inner space; A buried nut coupled to surround all of the screw ends of the protruding fastening bolts; And a connecting member having one end fixed to the buried nut and the other end fixed to the lower flange of the H-shaped steel to support the H-shaped steel.

Hereinafter, a formwork assembly according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

4 shows a formwork assembly according to a preferred embodiment of the present invention.

Referring to the drawings, the formwork assembly 100 of the present invention includes a rectangular formwork body in which concrete is poured therein. The form body is composed of a rectangular bottom 110 having a length corresponding to the length of the beam structure to be constructed, and a pair of side walls 120 and 130 integrally formed side by side on both sides of the floor 110, The floor 110 and the sidewalls 120 and 130 form a space in which the concrete is to be injected.

This form body is formed by winding or extruding glass fibers, carbon fibers, kevlar or mixed fibers or FRP fibers thereof, and may preferably be composed of a plurality of layers.

The formwork assembly 100 according to the present invention is to be placed in the concrete after being mounted in H-beams pre-installed at the time of construction of the beam structure. At this time, the formwork assembly 100 is provided with reinforcement means for supporting the formwork body so that the original form can be properly maintained without bending or damage.

The reinforcement means includes a plurality of support members 140 installed in the transverse direction on the bottom surface 110 of the form body. The support member 140 preferably has a steel pipe shape made of a metal material such as steel, and is arranged to be spaced apart at predetermined intervals across the bottom 110 of the formwork in a transverse direction as shown.

The support member 140 is fixed to the formwork by the fastening bolt 150, preferably, the support member 140 is formed with a through hole and the fastening bolt 150 is the through hole of the support member 140 and the form body Through the bottom 110 of the in turn, the screw end is protruded into the form interior space.

A buried nut 160 is fastened to the screw end of the protruding fastening bolt 150. The buried nut 160 is formed to cover all of the screw ends of the fastening bolts 150 and blocks the fastening bolts 150 from contact with concrete, thereby smoothly removing the fastening bolts 150 when dismantling the formwork. While the embedding nut 160 remains embedded in the concrete.

As will be described later, the buried nut 160 is a portion to be a bonding support for suspending the formwork assembly 100 of the present invention to the H-shaped steel. Thus, the distance D between adjacent buried nuts 160 preferably corresponds to the width of the lower flange of the H-beams (see W in FIG. 7).

The coupling number and position of the fastening bolt 150 and the buried nut 160 may be appropriately set in consideration of the size and size of the beam structure and the formwork to be constructed. Preferably, a packing tape (not shown) may be further attached between the buried nut 160 and the bottom 110 of the form body to prevent cement leakage.

In this embodiment, the support member 140 is illustrated as a continuous steel pipe across the bottom 110 of the formwork, but is not limited to this, each coupling point of the fastening bolt 150 and the buried nut 160, respectively It may also be a washer-type plate provided independently. Alternatively, although not shown in the drawings, the support member may be provided in the form of a continuous plate in surface contact with the bottom surface of the bottom 110 of the formwork body. Furthermore, it should be understood that the support member includes any means for supporting the formwork body in contact with the bottom 110 of the formwork.

According to the present invention, the deck plate support 170 is installed at the upper edge of the side walls 120 and 130 of the form body. The deck plate support 170 is for mounting the deck plate, etc. when installing the slab as described below.

The deck plate support 170 is preferably a coupling portion 171 coupled to be in contact with the upper edge of the side walls 120 and 130, and horizontally from the coupling portion 171, preferably both sides outward. And a support part 172 extending in the direction and supporting the deck plate mounted thereon. Preferably, in order to support the support part 172 more stably, an auxiliary coupling part 173 of a metal material may be further provided on the opposite side of the coupling part 171. More preferably, the auxiliary coupling portion 173 may have a continuous strip shape extending side by side along the upper edge portion of the side walls 120 and 130.

The coupling parts 171 and 173 may be coupled to the side walls 120 and 130 of the formwork body in various ways. Preferably, the coupling parts 171 and 173 form coupling holes in the coupling parts 171 and 173 as shown. It can be coupled to the formwork body by fastening the fastening bolt 180 and the like passing through the side wall. As described above, the fastening bolt 180 is coupled to the buried nut 181 to dismantle the formwork assembly after curing the concrete. Preferably, an adhesive resin 182 may be further applied between the coupling parts 171 and 173 to prevent leakage of concrete.

In addition, the support 172 is preferably formed with a coupling hole 172a to fasten a bolt or the like for coupling with the deck plate, as described below.

According to an embodiment of the present invention, a side reinforcing member 190 is further provided to connect and support the sidewalls 120 and 130 of the formwork body facing each other. Specifically, through-holes may be formed in the sidewalls 120 and 130, and a lateral reinforcing member 190 of a material such as rebar may be further installed therein. Threads are formed at both ends of the lateral reinforcement member 190, and both ends thereof are screwed by nuts 191 after being inserted through the through holes formed in the side walls 120 and 130 of the form body. Preferably, the lateral reinforcement member 190 is assembled when mounting the formwork assembly of the present invention to the H-shaped steel as described below.

Preferably, the reinforcing member between the side wall 120, 130 and the nut 191 so that the end of the lateral reinforcing member 190 can more firmly support the side wall (120, 130) of the form body. 192) can be intervened. The lateral reinforcing member 190 prevents the side wall 120, 130 of the formwork body from spreading out or collapsing due to the load of the concrete when placing concrete as described below.

Then, a method of constructing a building using a formwork assembly having the above configuration according to a preferred embodiment of the present invention will be described. 5 is a flowchart illustrating a building construction method according to a preferred embodiment of the present invention.

First, the H-shaped steel 20, which is a skeleton of a beam to be constructed, is installed between the section steels (200 in FIG. 6) installed at a position to be a pillar of a building (step S100). For example, the section steel 200 may be submerged on the ground at a position to be a pillar of a building, and then a portion of an upper portion of the section steel 200 may be exposed by carrying out a trench to a predetermined basement floor.

In general, the H-beam 20 is a web connecting the upper flange 21 and the lower flange 22 and the upper and lower flanges 21 and 22 arranged side by side as shown in FIG. 23).

According to the present invention, since the H-shaped steel 20 is constructed to be embedded in the slab concrete structure, it is not exposed to the outside, and thus does not require a separate fireproof coating treatment.

Specifically, as shown in FIG. 6, the support bracket 210 may be installed on one side of the shaped steel 200, and the end of the H shaped steel 20 may be fixed thereto. At this time, by inserting the fastening bolt 220 in the coupling hole formed at the end of the H-shaped steel 20 to be coupled to the bracket 210, the H-shaped steel 20 can be fixed stably.

Although the installation configuration for the H-shaped steel has been described in detail in the present embodiment, the present invention is not limited thereto, and it should be understood that the H-shaped steel may be connected by various other coupling methods including welding.

Subsequently, when the installation of the H-shaped steel 20 is completed, as shown in FIGS. 6 and 7, the reinforcing bars constituting the beam, that is, the reinforcing bars surrounding the H-shaped steel 20, are disposed (step S200).

In this embodiment, the reinforcing bar is a stub steel reinforcement 30 is installed at a predetermined interval along the longitudinal direction to surround at least a portion of the H-shaped steel 20, a plurality of tension / parallel to the H-shaped steel 20 Compression reinforcing bars 40 and 50.

The stirrup reinforcing bar 30 is closed to surround the lower flange 22 and both ends thereof are supported by being fixed by welding or the like by contacting both sides of the web 23 of the H-shaped steel 20.

The stirrup reinforcement 30 serves to evenly distribute the compressive force acting in the longitudinal direction of the H-shaped steel 20 over the cross section of the H-shaped steel 20, and to resist the shear force acting perpendicular to the cross-section.

The tension / compression bars 40 and 50 become supports that resist tensile and compressive stresses acting on the formwork assembly. Preferably, the first tension / compression rebar 40 is coupled to and supported by the stirrup reinforcement 30, preferably between the lower flange 22 of the H-shaped steel 20 and the stirrup reinforcement 30 in the longitudinal direction. Can be arranged.

In addition, the reinforcing bar may include a mounting member 35 installed on the top edge of the stirrup reinforcement (30). The mounting member 35 has a '-' shape, the one end (35a) is fixed or welded to the upper edge of both sides of the stirrup reinforcement 30, the other end (35b) is both sides of the beam Extend outwards; The mounting member 35 may be installed as a whole along the longitudinal direction or may be installed at a selective position as necessary.

According to the present embodiment, the extension portion 35b of the mounting member 35 is coupled to the second tension / compression reinforcement 50 is mounted, in this case the second tension / compression reinforcement 50 is the formwork assembly Since it is as far outward as possible from the center, it is possible to pass through the columnar steel 200 as shown in FIG.

Preferably, the second tension / compression rebar 50 may be configured to be located above or below the upper flange 21 of the H-beam 20. That is, the extension part 35b of the mounting member 35 may be located above or below the upper flange 21 of the H-shaped steel 20, and accordingly, the second tension / compression rebar 50 may also be located in the upper flange. It may be located above or below 21.

The tension / compression rebars 40 and 50 may be welded or secured by fastening means such as wires and such fastening means are not limited by embodiments of the present invention.

In addition, an auxiliary cap bar 45 may be further installed to stably couple the tension / compression rebar 50 mounted on the mounting member 35. The auxiliary cap bar 45 has a length corresponding to the distance between the tension / compression reinforcement bar 50 on both sides thereof is bent to surround the tension / compression reinforcement (50). Accordingly, both ends of the auxiliary cap bar 45 are disposed to surround the tension / compression bar 50, and then coupled to each other by a method such as welding or binding as described above. As an alternative, the end of the extension part 35b may be configured to be bent downward, for example, to enclose a portion of the outer circumferential surface of the tension / compression bar 50.

Although the configuration of the reinforcing bar is described in detail in the present embodiment, this is only an embodiment, and the present invention is not limited thereto, and it is obvious that an arrangement of various other bars may be employed.

When the reinforcement of the reinforcing bar is completed, the formwork assembly 100 according to the present invention is suspended from the H-shaped steel 20 as shown in FIGS. 8 and 9 (step S300). Preferably, the formwork assembly 100 is connected to the lower flange 22 of the H-shaped steel by the connecting member 60 to be suspended. That is, one end of the connecting member 60 is fixed to the embedding nut 160 installed on the bottom 110 of the formwork body by welding or the like, and the other end of the lower flange 22 of the H-shaped steel 20. It is fixed to cover the upper surface of both ends. In FIG. 8, in order to clearly show the coupling relationship between the buried nut 160 and the connecting member 60, they are shown in solid lines.

At this time, the upper end of the form side wall 120, 130 is positioned below the upper flange 21 of the H-shaped steel 20 to effectively reduce the height when building the slab as described below.

In a state in which the formwork assembly 100 is coupled to the H-shaped steel 20 in the same manner as described above, the buried nut 160 is supported by the connecting member 60, and the buried nut 160 is supported by a support member ( Since it is coupled with the fastening bolt 150 for coupling the 140, as a result the form body 100 can be supported by the support member 140 without sagging down. As described above, since the formwork assembly 100 of the present invention is supported on the H-shaped steel 20 by the connecting member 60, there is no need to install a separate supporting structure such as a copper bar at the bottom thereof, and thus the work space under the formwork Can be secured.

Furthermore, the horizontal reinforcement member 190 may be assembled to prevent the side walls 120 and 130 from opening or collapsing when the concrete is poured into the formwork. That is, the lateral reinforcing member 190 is inserted through the through hole formed in one side wall 120 of the form body, and the other end thereof is formed in the web 23 of the H-shaped steel 20 (see 23A in FIG. 6). After passing through the through hole formed in the other side wall 130. In this state, the nuts 191 are fastened to both ends of the lateral reinforcement member 190. Preferably, the reinforcing member 192 may be interposed between the side walls 120 and 130 and the nut 191 for a more firm coupling.

Although not shown in the drawings, a buried tube is installed to interconnect the through holes formed in the side walls 120 and 130 through the through holes 23 a formed in the web 23 of the H-beam 20. A horizontal reinforcing member such as reinforcing bars can be inserted therein and fixed at both ends thereof with a nut. In this case, the lateral reinforcing member can be removed after concrete pouring and curing.

As described above, when the installation of the formwork assembly 100 for the H-shaped steel 20 is completed, the deck plate 300 is mounted on the formwork assembly 100 as shown in FIG. 10 (step S400).

The deck plate 300 is typically made of steel and, as shown, its end is mounted on the deck plate support 170 at the top edge of the side walls 120 and 130 of the formwork body. Preferably, the deck plate 300 and the deck plate support 170 may be fastened to each other, for this purpose, as shown, the fastening bolt 185 is formed on the support 172 of the deck plate support 170 After passing through the through-holes formed in the coupling hole (172a) and the deck plate 300 in order is coupled to the buried nut (186). The embedding nut 186 is a nut that blocks the contact of the fastening bolt 185 to the concrete as described above, and is embedded in the concrete during the concrete pouring.

Next, with the installation of the deck plate 300, reinforcing bar is placed in the area where the slab is formed (step S500). According to the present embodiment, the reinforcing bars reinforcement to the slab preferably includes support reinforcing bars 310 installed on both sides of the H-shaped steel 20, and connecting reinforcing bars 320 installed across the H-shaped steel 20. do. Preferably, the connecting reinforcement 320 is installed to be adjacent to the support reinforcement 310, and serves to transfer the compressive force applied to the support reinforcement 310 on one side to the support reinforcement 310 on the other side. It is already known that stresses can be transferred between reinforcing bars when reinforcing bars embedded in concrete are approached within a predetermined distance from each other.

In addition, additional formwork 305 of FIG. 8 may be further installed to concrete at least a portion of the slab and column. More preferably, on the deck plate 300, metal lath (not shown) may be provided only for a part of the slab on both sides of the beam.

When the installation of the formwork assembly is completed as described above, as shown in Figure 10, the concrete is injected and cured in the beam, pillar and slab formation site (step S600). As concrete is poured, the embedding nuts 160, 181, 186 and the lateral reinforcement member 190 are also embedded in the concrete. At this time, the lateral reinforcement member 190 prevents the formwork assembly 100 is deformed laterally by the weight of the concrete.

As described above, when the metal lath (not shown) is provided only for a part of the slab on both sides of the beam, after the concrete is cured, the beam between the column and the column and the slab on both sides of the slab Only part is poured to form a so-called "T" shaped cross section. The remaining area in between will remain the area where the slab will later be poured. In addition, preferably, part of the basement outer wall together with the beam and the slab is poured at the same time. At this time, the deck plate 300 may be used as a permanent structure without being dismantled.

According to the present invention, when the concrete pouring of the beam is completed as described above, such a beam can withstand the earth pressure sufficiently, it is not necessary to install a separate construction, such as a conventional strut.

The above-described formwork installation and concrete pouring process are continuously performed to the basement floor, for example, when the concrete placement and curing to the bottom of the basement floor is completed, then the slab and the basement wall are constructed while moving up from the basement floor.

The construction method of the building according to the present invention can be applied in various ways, for example, construct the beam structure of the basement layer only on a part of the floor, not the entire floor, and after slaying the slab and the beam for the rest of the floor after the concrete is laid. You can also construct. At this time, the construction of the slab and the basement wall surface while going up from the bottom floor and proceed with the construction of the ground floor at the same time, it can be constructed in accordance with the so-called 'Up-Up method'.

As another alternative, after the beam and some slab construction of the ground floor is completed, the ground floor construction is performed simultaneously with the basement dig and the underground construction, so that it is also applicable to the so-called 'Top-Dopwn' method. Here, the ground floor beam and slab construction are performed in parallel while the underground floor trench and beam construction are in progress.

Such a construction method is possible because the construction of the beam by using the formwork assembly according to the present invention can sufficiently resist the earth pressure.

According to the building construction method using the formwork assembly of the present invention, after the concrete is cured, the formwork assembly 100 can be demolded and recycled again (step S700). That is, the fastening bolts 150, 180, and 185 are easily disconnected and dismantled because the contact with the concrete is blocked, and the embedding nuts 160, 181, and 186 are embedded in the cured concrete. Will remain.

When the nut and fastening bolts are loosened as above, the formwork assembly 100 is easily separated. Preferably, the disassembly ring (not shown) may be additionally installed on the outside of the formwork body to facilitate separation of the formwork assembly 100. More preferably, in order to further facilitate the demoulding of the formwork assembly 100, it is preferable to apply a release agent to at least a portion of the inner surface of the bottom 110 and the sidewalls 120 and 130 of the formwork body in advance before the concrete is placed. .

According to another aspect of the present invention, a composite steel beam is provided in which the formwork assembly is assembled to the H-beam. The configuration of the composite steel beam is the same as shown in FIG.

Composite steel beam of the present invention is composed of a formwork assembly 100 is coupled to the lower portion to support the H-shaped steel 20 and the H-shaped steel 20. That is, the formwork assembly 100 is not installed in the H-beams 20 during the building construction process, but is produced in a state in which the formwork assembly 100 is coupled to the H-beams 20 in advance.

The form assembly 100 is the same as described above. That is, the support member 140 is fixed to the formwork by the fastening bolt 150 and the buried nut 160.

In addition, one end of the connection member 60 is fixed to the embedding nut 160 of the formwork assembly by welding, and the other end is fixed to both ends of the lower flange 22 of the H-shaped steel 20 to formwork assembly 100 Is supported to surround the H-beams (20).

At this time, the upper end of the form side wall (120, 130) is to be positioned below the upper flange 21 of the H-shaped steel 20 as described above.

In addition, the reinforcing bars described in FIGS. 6 and 7 are disposed around the H-shaped steel 20.

When constructing a building using the composite steel beam of the present embodiment, both ends of the H-shaped steel 20 are connected to and fixed to the shaped steel 200 to be a pillar as shown in FIG. 8.

Then, the process of injecting concrete and injecting the deck plate 300 and the reinforcement for the slab is the same as in the above-described embodiment.

Although not shown in the drawings, the formwork assembly and the composite steel can be formed convexly curved upward along the longitudinal direction. That is, to prevent the shape beams from sagging downward due to the load received by the formwork during concrete placement, the shape of the form assembly and the composite steel beam of the present invention may be somewhat sag due to the weight of concrete. It is possible to maintain the horizontal state.

As described above, the formwork assembly and the construction method using the same according to the present invention has the following effects.

First, the formwork assembly of the present invention and the construction method using the same can effectively reduce the height of the floor without affecting the safety of the structure.

Second, the present invention makes it possible to effectively resist bending stress and compressive stress acting on the structure.

Third, according to the construction method of the present invention, there is no need to provide a separate fire-resistant coating on the H-beams.

Fourth, since the formwork assembly of the present invention is prepared in advance and can be easily installed on the H-shaped steel, construction is very easy, and after the curing of the concrete, the formwork can be easily demolded and recycled.

Claims (30)

A rectangular floor having a length corresponding to the length of the beam structure to be constructed, and a pair of side walls integrally formed side by side on both sides of the floor, the formwork forming a space into which concrete is to be injected by the floor and the side walls; main body; A support member that contacts the bottom surface of the form body to support the form body; A fastening bolt having a screw end connected to the support member and the bottom of the form body in order to fix the support member to the formwork to protrude into the form inner space; And Forming assembly comprising a; buried nut is coupled to surround all of the screw end of the protruding fastening bolt. The method of claim 1, The support member is a formwork assembly, characterized in that the steel pipe is coupled to be spaced apart at a predetermined interval across the bottom surface of the formwork in the transverse direction. The method of claim 1, Formwork assembly further comprises a deck plate support provided on the edge of the side wall of the formwork body. The method of claim 3, wherein The deck plate support, A coupling portion coupled in contact with an upper edge of the form side wall; And Formwork assembly comprising a support extending horizontally from the coupling portion. The method of claim 4, wherein The deck plate support, A fastening bolt penetrating the coupling hole formed in the coupling part and the side wall; Formwork assembly characterized in that the fastening by wrapping the nut end of the fastening bolt to block the contact with the concrete block. The method of claim 5, Formwork assembly, characterized in that the support is formed with a coupling hole for coupling with the deck plate placed thereon. The method according to any one of claims 1 to 6, Formwork assembly further comprises a side reinforcing member is installed to connect and support the side wall of the formwork body. The method of claim 7, wherein The lateral reinforcement member, Formwork assembly, characterized in that both ends of the threaded reinforcing bar is fixed by a nut after passing through the side wall of the formwork body. (a) connecting the H-beams for beam construction to the beams to be columns; (b) reinforcing the reinforcing bars constituting the beam around the H-beam; (c) a form body comprising a rectangular bottom having a length corresponding to the length of the beam and a pair of side walls integrally formed side by side on both sides of the bottom, and the form body in contact with the bottom surface of the form body; A supporting member for supporting the fastening bolt, the fastening bolt of the screw end of which is sequentially penetrated through the supporting member and the bottom of the formwork body to protrude into the form inner space to fix the supporting member to the formwork, and the screw of the protruding fastening bolt Suspending the formwork assembly to the H-shaped steel including a buried nut coupled to surround all of the ends; (d) mounting a deck plate over the formwork assembly; (e) injecting and curing concrete into the formwork assembly and the deck plate; And (f) releasing the formwork assembly by releasing the fastening bolts and at the same time leaving the buried nut to be embedded in concrete. The method of claim 9, In step (c), The form assembly is a building construction method characterized in that the one end is fixed to the buried nut and the other end is installed by a connecting member fixed to the lower flange of the H-beam. The method of claim 10, In step (c), The formwork assembly, the building construction method characterized in that the upper end of the side wall is installed below the upper flange of the H-beam. The method of claim 9, In step (c), The support member is a building construction method characterized in that the steel pipe is coupled to be spaced apart at a predetermined interval across the bottom surface of the form body in the transverse direction. The method of claim 9, Step (c) is, Building construction method further comprises the step of supporting by connecting the side wall of the formwork body by a lateral reinforcing member. The method of claim 9, The formwork assembly, A deck plate support having a coupling portion coupled to and in contact with an upper edge of the form body sidewall, and a support portion extending horizontally from the coupling portion, In step (d) The deck plate is a building construction method characterized in that the end is mounted on the support of the deck plate support. The method of claim 14, The deck plate support, A fastening bolt penetrating the coupling hole formed in the coupling part and the side wall; Building construction method characterized in that it is fixed to the upper edge of the side wall of the formwork body by a buried nut to block the contact with the concrete by wrapping the screw end of the fastening bolt. The method of claim 14, A coupling hole is formed in the support part and the deck plate, and a fastening bolt is coupled to the buried nut through the coupling hole of the support part and the deck plate. The method of claim 9, Reinforcing bar is reinforced in step (b), A plurality of stirrup bars installed at predetermined intervals along the longitudinal direction of the H-beams so as to surround the lower flanges of the H-beams and both ends thereof abut against both side surfaces of the web of the H-beams; And And a plurality of first tensile / compression bars arranged in the longitudinal direction of the H-beam to the stub steel. The method of claim 17, The rebar, A plurality of mounting members whose one end is fixed to upper edges of both sides of the stirrup reinforcement and the other end extends outward in both directions; And Building construction method comprising a; at least one or more second tension / compression reinforcement is fixed to the mounting member in the longitudinal direction. The method of claim 9, Step (d) is, Building construction method further comprising the step of reinforcing reinforcing bar in the area where the slab is formed. The method of claim 19, Reinforcing bars are reinforced in the area where the slab is formed, Support bars respectively installed on both sides of the H-beam; And And a connecting reinforcing bar installed across the H-beam to be adjacent to the supporting reinforcing bar. The method of claim 19, On the deck plate, the building construction method, characterized in that the metal glass is provided only for a part of the area of the slab on both sides of the beam. An H-beam consisting of an upper flange, a lower flange, and a web connecting the upper and lower flanges to each other; Reinforcing bars arranged around the H-shaped steel; A rectangular floor having a length corresponding to the length of the beam structure to be constructed, and a pair of side walls integrally formed side by side on both sides of the floor, the formwork forming a space into which concrete is to be injected by the floor and the side walls; main body; A support member that contacts the bottom surface of the form body to support the form body; A fastening bolt having a screw end connected to the support member and the bottom of the form body in order to fix the support member to the formwork to protrude into the form inner space; A buried nut coupled to surround all of the screw ends of the protruding fastening bolts; And And a connecting member having one end fixed to the buried nut and the other end fixed to the lower flange of the H-beam to support the H-beam. The method of claim 22, The support member is a composite steel beam, characterized in that the steel pipe coupled to be spaced apart at a predetermined interval across the bottom surface of the form body in the transverse direction. The method of claim 22, The composite steel beam further comprises a deck plate support provided at the upper edge of the side wall of the formwork body. The method of claim 24, The deck plate support, A coupling portion coupled in contact with an upper edge of the form side wall; And Composite steel beam comprising a support extending horizontally from the coupling portion. The method of claim 25, The deck plate support, A fastening bolt penetrating the coupling hole formed in the coupling part and the side wall; Composite steel beam characterized in that the fastening bolt is wrapped by a buried nut to block the contact with the concrete by wrapping the screw end of the bolt. The method of claim 26, The support portion is a composite steel beam, characterized in that the coupling hole is formed for coupling with the deck plate placed thereon. The method of claim 22, The rebar, A plurality of stirrup bars installed at predetermined intervals along the longitudinal direction of the H-beams so as to surround the lower flanges of the H-beams and both ends thereof abut against both side surfaces of the web of the H-beams; And And a plurality of first tensile / compression reinforcing bars arranged in the longitudinal direction of the H-shaped steel to the stirrup reinforcing bars. The method of claim 28, The rebar, A plurality of mounting members whose one end is fixed to upper edges of both sides of the stirrup reinforcement and the other end extends outward in both directions; And Composite steel beam comprising a; at least one or more second tension / compression reinforcing bars fixed to the mounting member in the longitudinal direction. The method according to any one of claims 22 to 29, wherein Composite steel beam further comprises a horizontal reinforcing member is installed to connect and support the side wall of the form body.

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