KR101076407B1 - Doughnut type concrete former, biaxial hollow core slab using the concrete former and construction method thereof - Google Patents

Abstract

The present invention relates to a lightweight two-way hollow slab, a donut-shaped hollow forming body that can be advantageously used for the construction of the two-way hollow slab, and a preferred method of constructing the two-way hollow slab.

The donut-shaped hollow forming body according to the present invention is characterized in that the hollow portion of the circular cross section is formed in the center of the three-dimensional body and the edge is treated with a curved surface to have an overall donut-shaped shell.

Two-way hollow slab according to the present invention, the donut-like hollow forming body is spacingly arranged in a number of rows multiple rows; A slab lower reinforcement beneath the donut-shaped hollow body; Slab upper reinforcement is placed on the donut-shaped hollow body; The slab concrete which is poured into the thickness of the slab upper and lower reinforcement is embedded; comprising, the hollow-shaped body is installed to be constrained in the reinforcing cage or bound to the reinforcement spacer, the hollow forming body is slab upper and lower reinforcement Characterized in that it is disposed in the form of a matrix along the transverse and longitudinal direction between the embedded in the slab concrete.

Hollow, Donut, Hollow Slab, 2 Way, Cage

Description

Donut type concrete former, biaxial hollow core slab using the concrete former and construction method

The present invention relates to a lightweight two-way hollow slab, in which a hollow body is disposed in a matrix form along a transverse and longitudinal direction between upper and lower reinforcing slabs and embedded in slab concrete to exhibit two-way resistance characteristics. Specifically, the present invention relates to a donut-like hollow forming body which can be advantageously used in a two-way hollow slab, a two-way hollow slab using such a donut-like hollow forming body, and a preferred method of constructing the two-way hollow slab.

Hollow core slab (hollow core slab) is a slab having a hollow core (hollow core) in the center, exhibits excellent cross-sectional performance compared to its own weight and has the advantage of reducing the interlayer noise.

One of the slab systems currently used in buildings in terms of weight reduction of the slab weight is a one-way hollow core slab. Since most of the slabs of building structures such as apartment houses exhibit two-way behavior, it is difficult to directly apply one-way hollow slabs without design changes and additional costs. In order to solve this problem, a two-way hollow slab was developed by a bubble deck company in the Netherlands and a Cobiax company in Switzerland using a spherical or ellipsoidal plastic ball as a hollow body.

1 shows a conventional two-way hollow slab. As can be seen in the two-way hollow slab, the slab spheres exhibit two-way resistance characteristics as the ball-shaped hollow bodies are arranged in a large number of rows and embedded in the slab concrete. As shown in FIG. 1, the two-way hollow slab is integrally connected by a concrete part filled between the slab bottom in which the slab bottom reinforcement is embedded and the ball-shaped hollow forming body in which the slab upper reinforcement is embedded, thereby completing the slab sphere in two directions. Structure. Such a two-way hollow slab needs special attention to fix the position of the hollow body.

On the other hand, the hollow ratio by the shape and volume of the hollow body in the two-way hollow slab on the one hand determines the amount of concrete and self-weight reduction of the slab and on the other hand determines the structural performance of the slab spheres. In other words, the higher the hollow ratio, the smaller the amount of slab concrete, but the lower the structural strength of the slab. In particular, in the case of a two-way hollow slab, there is a concern that the hollow body is separated into a top and a bottom with a hollow body formed therebetween.

The present invention has been developed in order to solve the problem of lowering the structural performance due to the increase of the hollow ratio in the conventional two-way hollow slab and to improve the workability as follows.

First, it is intended to provide a hollow body that can construct a two-way hollow slab structurally stable while ensuring maximum hollow ratio.

Second, to provide a two-way hollow slab that can secure the construction quality according to the structural design by stably positioning the hollow forming body between the upper and lower reinforcing bar.

Third, to provide a method that can simplify the reinforcement of the slab reinforcement in the construction of the two-way hollow slab.

In order to solve the above technical problem, the present invention provides a donut-shaped hollow body, a two-way hollow slab, and a construction method thereof.

The donut-shaped hollow forming body according to the present invention is a member embedded in the concrete for the construction of the light weight concrete member, characterized in that the hollow portion is formed in the center having a donut-shaped shell as a whole.

Two-way hollow slab according to the present invention, the reinforcing cage consisting of the first and second side vent roots, the upper vent roots and the first and second stage butyl root; The donut-shaped hollow forming body which is installed in a state of being restrained inside the reinforcing cage by fitting grooves formed in each of the opposite sides facing each other and is arranged sparsely in a plurality of rows; A slab lower reinforcing bar under the reinforcing cage; Characterized in that it comprises a ;; slab concrete to be cured in the thickness of the slab upper and lower reinforcement is embedded.

Another two-way hollow slab according to the present invention comprises: a reinforcing cage consisting of first and second upper and lower horizontal muscles, first and second side tilt muscles, upper horizontal muscles, and first and second stage butt roots; The donut-shaped hollow forming body which is installed in a state of being restrained inside the reinforcing cage by fitting grooves formed on each of the opposite sides, and is spaced apart in a plurality of rows; A slab lower reinforcing bar under the reinforcing cage; Characterized in that it comprises a ;; slab concrete to be cured in the thickness of the slab upper and lower reinforcement is embedded.

Another two-way hollow slab according to the present invention, the donut-shaped hollow forming body spacingly arranged in a number of rows; A slab lower reinforcing bar reinforcement under the donut-shaped hollow forming body with a main bar and a reinforcement bar; A slab upper reinforcing bar reinforcement on the donut-shaped hollow forming body to the main and reinforcement; A reinforcing bar spacer disposed between the donut-shaped hollow former and the slab upper and lower reinforcing bars to be installed; Characterized in that it comprises a ;; slab concrete to be cured in the thickness of the slab upper and lower reinforcement is embedded.

Construction method of a two-way hollow slab according to the present invention, the step of reinforcing slab lower reinforcement; Disposing the reinforcing cage in the state where the donut-shaped hollow forming body is restrained on the slab lower reinforcing bars; Reinforcing the slab upper rebar on the reinforcing cage; It characterized in that it comprises a; step of curing the slab concrete.

According to the present invention, the following effects can be expected.

First, it is possible to construct a structurally stable hollow slab exhibiting two-way resistance characteristics. In particular, since the slab concrete is filled in the hollow part by using a donut-shaped hollow forming body having a hollow part in the center, the unity of the upper and lower parts of the slab spheres separated by the hollow forming part can be improved. Reinforced hollow slabs can be constructed.

Second, since the hollow body is embedded in the slab concrete while the hollow body is bound to the reinforcing cage or bound to the reinforcing bar spacer, the hollow body can be constructed as a hollow slab that ensures the construction quality while placing the hollow body in the center between the upper and lower bars of the slab. have. In particular, the reinforcing cage can be constructed as a structurally advantageous hollow slab because it acts to fix the position of the hollow forming body, but also acts as a shear reinforcing bar restrained by the slab concrete.

Third, the reinforcement of the slab reinforcement in the construction of the hollow slab can be simplified because the reinforcing bar of the slab upper and lower reinforcement to the reinforcing cage to the reinforcement spacer for fixing the position of the hollow forming body in advance.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

2 and 3 show a donut-shaped hollow body 100 according to the present invention. Hollow body member 100 is a member that is buried in the concrete to prevent the concrete is filled in the installation space to be completed as a lightweight concrete member. In other words, the hollow forming body 100 itself serves as a hollow core to impart light weight to the concrete member.

In particular, the present invention proposes a donut-shaped hollow body 100 having a hollow portion 110 formed at the center thereof and having a donut-shaped shell as a whole. In the present invention, the donut-shaped hollow body 100 has a hollow portion 110 having a circular cross section at the center of a three-dimensional body and is treated with a curved surface to have an overall donut-shaped outer shell.

In addition, in the present invention, the donut-shaped hollow body 100 may be formed as a hollow hollow portion 120 in a donut-shaped shell, and may also be provided in a structure in which two or more component pieces 100a and 100b are assembled. have. The cavity portion 120 serves to further add the lightness of the donut-shaped hollow body 100, and the assembly structure by the component angle pieces 100a and 100b overlaps each of the component pieces 100a and 100b. This makes it possible to minimize the volume during transportation. The cavity portion 120 may be filled with soundproof / dustproof materials such as insulation or rubber such as foamed styrofoam, and the donut-shaped hollow body 100 filled with heat insulation / soundproof / dustproof material is advantageously applied to a place where heat insulation or dustproofness is required. can do.

In FIG. 2 and FIG. 3, a donut-shaped hollow body 100 having a structure in which two component angle pieces 100a and 100b are assembled can be seen. In FIG. 2, two stepped angle pieces 100a and 100b correspond to each other. It is a structure that is assembled by fitting by 131a, 131b, Figure 3 is a structure in which the two angular pieces (100a, 100b) is assembled by engaging by the protrusions 132a and the locking 132b corresponding to each other. to be.

Meanwhile, in FIGS. 2 and 3, it can be seen that the fitting grooves 140a, 140b, and 140c are formed in the outer shell of the donut-shaped hollow body 100, and the fitting grooves 140a, 140b, and 140c are donut-shaped hollow bodies ( It is a configuration provided to restrain the 100 to the reinforcing cage 200 or to bind to the reinforcing spacer (300). In particular, in the donut-shaped hollow body 100 of FIG. 3, an X-shaped fitting groove 140a is formed at a side surface, and a straight fitting groove 140b and a trapezoidal fitting groove 140c are formed at upper and lower surfaces thereof. This can be confirmed, which is to universally use the donut-shaped hollow body 100 regardless of the type of the reinforcing cage 200 and the reinforcing spacer 300 proposed in the present invention.

The donut-shaped hollow forming body 100 according to the present invention may be made lighter than concrete in comparison with the same volume, and in consideration of the hollow forming body being installed in place of concrete, the hollow forming body is made of eco-friendly material instead of concrete that is difficult to recycle. desirable. For example, it is made of eco-friendly bioplastics such as biodegradable plastics or biomass plastics. Biomass plastic is a polymer that induces the reduction of the use of fossil resources by using renewable organic resources (PLA, natural fiber), and can be recognized to reduce CO 2 by the amount of biomass substitution. In addition, the hollow body can be made of plastic (PP, PE, etc.). In particular, the strength of the hollow body (tension and compression) can be increased by using reinforced plastics having glass fiber (GF) added up to about 40%. It can be increased by about 2-3 times.

Furthermore, in the present invention, a preferred hollow body for constructing a two-way hollow slab, the height (H) of the body is 120 ~ 150mm, the length (L1, L2) of the body is 90 ~ 270mm, the diameter of the study We suggest that it is 15-45mm. The height of the body considers the thickness of the hollow slab and the covering thickness of the slab upper and lower reinforcing bars, and the length of the body considers the hollow ratio of the slab (more than 30%), and the diameter of the hollow part is the filling of the slab concrete and the The hollow factor is taken into account.

4 illustrates a two-way hollow slab completed using the toroidal hollow body 100 of FIG. 2. As shown in the two-way hollow slab, the donut-shaped hollow forming body 100 is spaced in a plurality of rows between the slab upper and lower reinforcing bars 411, 412, 413, and 414 to be embedded in the slab concrete 420. Completed in form

In particular, as the hollow portion 110 of the donut-shaped hollow forming body is filled with concrete, the two-way hollow slab is structurally stable because concrete portions can be formed at regular intervals regardless of the size of the donut-shaped hollow forming body 100. Can be built. That is, the bottom of the slab in which the slab lower reinforcing bars 411 and 412 are embedded and the top of the slab in which the upper slab upper bars 413 and 414 are embedded are not only between the donut-shaped hollow bodies 100 but also the hollows of the donut-shaped hollow bodies. Stability of the entire hollow slab is reinforced because it is integrally connected by the concrete part filled in the portion (110). As a result of the analysis, as the hollow part 110 is filled with concrete, it is confirmed that the rigidity of the hollow slab is increased and sagging is reduced, and the fracture is delayed as the cracks of the concrete are dispersed by the curved surface treatment.

On the other hand, in the two-way hollow slab construction, the position fixing of the hollow body 100 is important, the present invention proposes a position fixing method by the reinforcing cage 200 and the position fixing method by the reinforcement spacer (300). 5 to 13 show the position fixing method by the reinforcing cage 200, Figures 14 and 15 show the position fixing method by the reinforcing spacer 300. The reinforcing cage 200 and the reinforcing spacer 300 are proposed as a structure for stably positioning the slab upper and lower reinforcing bars 411, 412, 413, and 414 by controlling the mobility of the hollow body 100.

5 to 13, the reinforcing cage 200 for fixing the position of the hollow forming body 100 is manufactured by assembling reinforcing bars (materials corresponding to reinforcing steel bars, etc.), and the hollow forming body 100 is formed therein. It has a structure to be restrained. After the reinforced cage 200 is embedded in the slab concrete 420 is also restrained by the slab concrete 420 serves to compensate for the problem of reducing the shear performance due to the cross-sectional loss caused by the hollow body (100).

5 to 7 are examples of the reinforcing cage 200 using a vent root properly. Reinforcing cage 200 of Figure 5 is the most basic form proposed to restrain one hollow forming body 100 therein, the reinforcing cage 200 of Figure 6 has two hollow forming body 100 therein In order to restrain the installation, the reinforced cage of FIG. 5 is extended to twice the length, and the reinforced cage 200 of FIG. 7 has the reinforced cage of FIG. 5 to restrain the four hollow bodies 100 therein. 200) is extended to four times the length. Of course, it can be extended to various lengths based on the reinforced cage 200 of FIG.

As shown in FIG. 5, the reinforcing cage 200 is formed by welding assembly of the first and second side vent roots 210 and 220, the upper vent root 230, and the first and second stage butt roots 241 and 242. It is composed. The first side vent muscle 210 is divided into a first inclined portion 211 and a first horizontal portion 212 extending from both sides of the first inclined portion, and is inclined to be arranged to constitute the first side. do. The second side vent muscle 220 is divided into a second inclined portion 221 and a second horizontal portion 222 connected to both sides of the second inclined portion 221 by bending the reinforcing bar, facing the first side vent root 210. While being inclined toward the first side vent muscle 210 while being arranged to constitute the second side, the second inclined portion 221 is positioned in a direction crossing with the first inclined portion 211 of the first side vent muscle. Is placed. The upper vent muscle 230 is also divided into a third inclined portion 231 and a third horizontal portion 232 connected to both sides of the third inclined portion 231, and the upper vent root 230 is disposed to face each other. The first and second side vent roots 210 and 220 are arranged horizontally on the upper part to form an upper surface, while each of the third horizontal parts 232 on both sides is arranged in the first and second sides of the first and second side vent roots. It is installed tightly with the horizontal portions 212 and 222. The first end butyl root 241 is installed to incline the first horizontal portion 212 of one end of the first side vent root 210 and the second horizontal portion 222 of one end of the second side vent root 220. do. The second end butyl root 242 is inclined to connect the first horizontal portion 212 of the other end of the first side vent root 210 and the second horizontal portion 222 of the other end of the second side vent root 220. Is installed.

Reinforcing cage 200 of Figures 6 and 7 is the form of the reinforcing cage of Figure 5 is extended, which is the first and second side vent (210, 220) and the upper vent (230) in the reinforcement trapezoidal shape It is realized by using a continuous bent. In other words, the reinforced cage of FIG. 6 is provided with two first, second, and third inclined portions 211, 221, and 231, respectively, and both ends thereof are ended with the first, second, and third horizontal portions 212, 222, and 232. When the first and second side vent roots 210 and 220 and the upper vent root 230 are provided, the reinforcing cage of FIG. 7 is first, second and third inclined portions 211, 221, and 231, respectively. In addition, the first and second side vent roots 210 and 220 and the upper vent root which are provided so that both ends are finished with the first, second and third horizontal parts 212, 222, and 232 are completed. Considering various conditions such as transportation and field work, the reinforcing cage 200 standard of FIG. 7 is suitable for application to a site.

As shown in FIGS. 5 to 7, the reinforcing cage 200 using the vent root has an overall appearance having a three-dimensional structure of a hexahedron, so that the self-supporting structure becomes self-supporting. That is, the first and second side vent roots 210 and 220 constitute both sides of the hexahedron, the upper vent root 230 constitutes the upper surface of the hexahedron, and the first and second stage butt roots 241 and 242. The front and rear surfaces of the hexahedron are formed, respectively, and the first and second horizontal parts 212 and 222 of the first and second side vent roots become support points to enable self-support. In particular, since the first and second side vent roots 210 and 220 are disposed to be inclined toward each other, the front and rear surfaces of the reinforced cage 200 are trapezoidal (Figs. 5 (b), 6 (b) and 7). (b)).

5 (c), 6 (c) and 7 (c), it can be seen that the donut-shaped hollow forming body 100 of FIG. 2 is restrained in the reinforced cage 200. In order for the hollow body 100 to be restrained and installed inside the reinforcing cage, the hollow body 100 should be provided such that fitting grooves 140a are formed on each of the opposite sides. Thus, when the hollow forming body 100 is inserted into the reinforcing cage 200, the first and second inclined parts 211 and 221 of the first and second side vents are inserted into the fitting groove 140a, thereby forming the hollow forming body ( 100 is constrained to the reinforcing cage 200. Once the hollow forming body 100 is constrained to the reinforcing cage 200, the hollow forming body 100 is inclined toward each other even though buoyancy is applied to the hollow forming body 100 during the slab concrete 420 pouring process. Injury (浮上) is suppressed while being caught by the first and second side vent roots 210 and 220, whereby the hollow body 100 is stably embedded in the slab concrete 420 at a predetermined position. Considering the construction state of the hollow forming body 100, when the plurality of hollow forming body 100 is restrained and installed in one reinforcing cage 200 as shown in Figs. 6 (c) and 7 The length of the first, second, and third horizontal parts 212, 222, and 232 positioned in the middle of the first and second side vent roots 210 and 220 and the upper vent root 230, respectively. You will be able to adjust the placement interval.

Meanwhile, the donut-shaped hollow body 100 of FIG. 2 is an example in which fitting grooves 140a of both sides are provided in the same manner as the first and second inclined portions 211 and 221 of the first and second side vents, respectively. The donut-shaped hollow body 100 of FIG. 3 is provided with an X-shape in which fitting grooves 140a at both sides of the donut-shaped hollow body 100 coincide with the arrangement state of the first and second inclined portions 211 and 221 of the first and second side vents. For example, the donut-shaped hollow body 100 of FIG. 3 is advantageous because there is no restriction in the installation direction. In other words, the donut-shaped hollow body 100 of FIG. 2 should be installed while matching the direction of the fitting groove 140a with the direction of the first and second inclined portions 211 and 221 of the first and second side vents. The donut-shaped hollow body 100 of FIG. 3 is limited in the installation direction because the shape of the first and second inclined portions 211 and 221 of the first and second side vents is shown in both fitting grooves 140a. There is no

8 and 9 show the process of constructing the two-way hollow slab and the completed two-way hollow slab using the reinforcing cage of FIG. 7, respectively. The method of the reinforcing cage 200 of FIGS. 5 and 6 is the same method. Is applied. The two-way hollow slab first crosses the main rod 411 and the reinforcement rod 412 with the slab lower reinforcing bars, and then the reinforcing cage 200 in the state where the donut-shaped hollow body 100 is constrained therein. It is disposed on the reinforcing bars (411, 412), and then cross-strengthening the reinforcement bar 413 and the main bar (414) with the slab upper reinforcement on the reinforcing bar cage 200 is constructed by the process of pouring the slab concrete 420 . At this time, the reinforcing cage 200 may be fixed to the slab lower reinforcing bars (411, 412) by binding with a binding line. On the other hand, the reinforcing cage 200 also serves as a spacer for maintaining a constant reinforcement position of the upper slab reinforcement (413, 414).

10 and 11 are examples of the reinforced cage 200 using the horizontal bar as an example, and include examples of the reinforced bars of the upper and lower bar slabs.

As shown in FIG. 10, the first and second upper and lower horizontal muscles 251, 252, 253, and 254, the first and second side tilt muscles 261 and 262, and the upper butt roots as shown in FIG. 263 and the first and second stage butt roots 241 and 242. The first and second lower horizontal muscles 251 and 252 are disposed parallel to each other, and the first and second upper horizontal muscles 253 and 254 are positioned above the first and second lower horizontal muscles 251 and 252. The first and second upper and lower horizontal roots 251, 252, 253, and 254 form a trapezoidal arrangement structure, in which the first and second upper and lower horizontal roots are arranged to be spaced apart from each other in a narrower width than the lower horizontal roots 251 and 252. The first side tilt muscles 261 are installed to obliquely connect the first upper and lower horizontal roots 251 and 253 along the length direction of the first upper and lower horizontal roots 251 and 253, and the neighboring members The inclination directions are reversed and spaced apart. The second side tilt root 262 is installed to incline the second upper and lower horizontal roots 252 and 254 to each other along the longitudinal direction of the second upper and lower horizontal roots 252 and 254, and the first side surface. The tilt roots 261 are disposed to be opposite to the inclined direction and disposed to alternate with the first side tilt roots 261 at opposite positions. The upper butyl root 263 is installed to connect the first and second upper horizontal roots 253 and 254 to be inclined with respect to each other along the longitudinal direction of the first and second upper horizontal roots 253 and 254, respectively. The first and second side tilt roots 261 and 262 are installed to connect with each other. The first short butt root 241 is installed to obliquely connect one end of the first upper horizontal root 253 and one end of the second lower horizontal root 252. The second end butyl root 242 is inclined to connect the other end of the first upper horizontal muscle 253 and the other end of the second lower horizontal muscle 252 or the other end of the second upper horizontal muscle 254 and the The first lower horizontal muscle 251 is installed to incline the other end. In the reinforced cage 200 of FIG. 10, the first and second upper and lower horizontal bars 251, 252, 253 and 254 are used as the backing bars 412 and 413 of the slab upper and lower bars.

Reinforcing cage 200 of Figure 10 can be seen that the overall appearance is similar to the reinforcing cage of Figures 5 to 7 described above. The first and second upper and lower horizontal roots 251, 252, 253 and 254 correspond to the first, second and third horizontal parts 212, 222 and 232 of the first and second side vent roots and the upper vent root, respectively. The first and second side tilt roots 261 and 263 correspond to the first and second inclined portions 211 and 221 of the first and second side vent roots, and the upper butt root 263 is the third slope of the upper vent root. This is because it has the same arrangement state as the unit 231. Accordingly, the hollow body 100 is restrained and installed in the same manner as the reinforced cage 200 of FIGS. 5 to 7 in the reinforced cage 200 of FIG. 10.

11 is an example in which the first and second upper and lower horizontal bars 251, 252, 253, and 254 are further welded and assembled to the reinforced cage of FIG. The first lower horizontal root 251 is installed to connect the first horizontal portion 212 located below the first side vent root 210 to each other, the second lower horizontal root 252 to the second side vent root The first horizontal portion 212 is installed to connect the second horizontal portion 222 located at the lower portion of the 220, and the upper portion of the first side vent root 210 with the first upper horizontal root 253. And the third horizontal part 232 positioned at one side of the upper vent root 230 to be connected to each other, and the upper part of the second side horizontal root 254 as the upper horizontal root 254. The second horizontal portion 222 positioned and the third horizontal portion 232 positioned on the other side of the upper vent root 230 are installed to be connected to each other. Since the first and second upper and lower horizontal muscles 251, 252, 253 and 254 are used as the back muscles 412 and 413 of the slab upper and lower rebars, the reinforced cage 200 of FIG. 11 is the reinforced cage of FIG. It can be seen that the back beams 412 and 413 of the slab upper and lower rebars are joined to the 200 in advance.

As shown in FIGS. 10 to 11, both ends of the first and second upper and lower horizontal muscles 251, 252, 253, and 254 extend horizontally more than other portions, while the one end of the reinforced cage 200 using the horizontal muscle extends. It is preferable to provide a bent form, which takes into account that the first, second upper and lower horizontal muscles 251, 252, 253, 254 overlap when the reinforcing cage 200 is continuously arranged in series.

12 and 13 illustrate a process of constructing a two-way hollow slab using the reinforcing cage 200 of FIG. 11 and a cross section of the completed two-way hollow slab. The reinforcing cage 200 of FIG. 10 is also applied in the same manner. do. Since the reinforcing cage 200 of FIG. 11 has a form in which the first and second upper and lower horizontal bars 251, 252, 253, and 254 are further provided in the reinforcing cage 200 of FIG. 7, the reinforcing cage 200 of FIG. 200), the step of reinforcing the reinforcement bars 412 and 413 in the slab upper and lower reinforcement process can be omitted.

14 to 15, the reinforcement spacer 200 for fixing the position of the hollow body is formed between the hollow body 100 and the hollow body 100 and the reinforcement bars 412 and 413 of the slab upper and lower bars. It has a structure which is attached to each of the reinforcing muscles (412, 413). Specifically, the reinforcing bar spacer is composed of a reinforcing bar piece 310 provided to weld or fit the back muscles 412 and 413; and a protruding protrusion 320 provided to fit the hollow forming body 100.

14 shows an example of rebar spacer 300 utilizing rebar. The rebar spacer 300 of FIG. 14 continuously provides bending of the reinforcing bar to provide the U-shaped protruding protrusion 320 in the center and horizontal reinforcing bar binding pieces 310 at both ends to provide the reinforcing bar binding piece 310 to the back muscle 412. And 413 for welding.

15 is an example of a reinforcement spacer 300 manufactured by plastic injection molding. Rebar spacer 300 of Figure 15 has been conventionally used conventionally, by providing a reinforcing bar binding piece 310 in the form of elasticity and by providing an elastic protrusion 320 in a trapezoidal form beneath the reinforcing bar binding piece ( It is used in such a manner that the power roots 412 and 413 are fitted to 310.

14 (b) and 15 (b), it can be seen that the donut-shaped hollow forming body 100 of FIG. 3 is bound to the reinforcing spacer 300. In order for the hollow body 100 to be installed on the reinforcing spacer 300, the hollow body 100 should be provided such that fitting grooves 140b and 140c are formed on the upper and lower surfaces thereof facing each other. 140b and 140c should have a shape corresponding to the protruding protrusion 320 of the reinforcing spacer. Thus, when the hollow forming body 100 is bound to the reinforcing spacer 300, the protrusions 320 are fitted into the fitting grooves 140b and 140c while the hollow forming body 100 is bound to the reinforcing spacer 300. Once the hollow forming body 100 is bound to the reinforcing spacer 300, even if buoyancy acts on the hollow forming body 100 in the slab concrete 420 pouring process, the hollow forming member 100 is reinforced reinforcing piece 310 of the reinforcing spacer. Flotation is suppressed by the weight of the upper reinforcement muscle 413 bound to the above, whereby the hollow body 100 is stably embedded in the slab concrete 420 at a predetermined position. Thus, the two-way hollow slab completed using the reinforcement spacer 300 is as shown in FIG.

The present invention has been described in detail above with reference to specific embodiments, but the embodiments are only for illustrating the present invention, and thus, the embodiments substituted, added, and modified within the scope without departing from the spirit of the present invention are also present. It will be said to belong to the protection scope of the invention.

1 shows a conventional two-way hollow slab.

2 and 3 illustrate a toroidal hollow body according to the present invention.

4 shows a two-way hollow slab completed using the toroidal hollow body of FIG. 2.

5 to 7 illustrate a state in which the donut-shaped hollow forming body of FIG. 2 is restrained and installed in the reinforcing cage using the vent muscle and the reinforcing cage thereof.

8 and 9 illustrate a process of constructing a two-way hollow slab using the reinforced cage of FIG. 7 and a cross section of the completed two-way hollow slab.

10 and 11 illustrate a state in which the donut-shaped hollow forming body of FIG. 2 is restrained and installed in the reinforcing cage using the horizontal bar and the reinforcing cage thereof.

12 and 13 illustrate a cross-section of a completed two-way hollow slab and a process of constructing a two-way hollow slab using the reinforcing cage of FIG. 11.

14 and 15 illustrate a state where the donut-shaped hollow forming body of FIG. 3 is installed using a reinforcing spacer and the reinforcing spacer.

FIG. 16 shows a cross section of a two-way hollow slab completed using the reinforcing bar spacer of FIG. 14.

<Description of the symbols for the main parts of the drawings>

100: (donut type) hollow body

100a, 100b: Each piece

110: hollow part

120: common part

140a, 140b, 140c: fitting groove

200: reinforced cage

210, 220: first and second side vent roots

230: Upper vent root

241 and 242: first and second stage butyl roots

251, 252, 253, 254: First and second upper and lower horizontal muscles

261, 262: first and second side tilt roots

263: upper butyl root

300: rebar spacer

310: Reinforcing Bar

320: protrusion

411, 412, 413, 414: slab rebar

420: slab concrete

Claims (12)

As a member embedded in the concrete for the construction of lightweight concrete members, Hollow-shaped hollow body 100, characterized in that the hollow portion 110 is formed in the center of the three-dimensional body with a circular cross-section is curved to have a donut-shaped outer shell. In claim 1, The hollow body is a donut-shaped hollow body (100), characterized in that formed in the hollow hollow portion 120 of the donut-shaped outer shell. 3. The method of claim 2, Donut-shaped hollow body 100, characterized in that the cavity 120 is filled with a heat insulating material or a dustproof material. 3. The method of claim 2, The hollow body is composed of a structure in which two or more constituent pieces (100a, 100b) are assembled, while each constituent piece is made of any one of reinforced plastics, biodegradable plastics, and biomass plastics containing glass fibers. Toroidal hollow forming body (100). The method according to any one of claims 1 to 4, The hollow body, the donut-shaped hollow body 100, characterized in that the height of the body is 120 ~ 150mm, the length of the body is 90 ~ 270mm, the diameter of the hollow portion is 15 ~ 45mm. Reinforcing cage 200 is manufactured by assembling the reinforcing bar; A donut-shaped hollow body 100 spaced apart in a plurality of rows in a state constrained inside the reinforcing cage 200; Slab lower reinforcing bars (411, 412) cross-reinforced by the main bar and the reinforcement bar below the reinforcing cage 200; Slab upper reinforcing bars (413, 414) cross-reinforced on the reinforcement cage 200 to the main and reinforcement; Consists of slab concrete 420, which is cured to the thickness that the upper and lower reinforcing slab (411, 412, 413, 414) is embedded; The reinforcing cage 200, The first side vent root 210 is bent to be divided into a first inclined portion 211 and a first horizontal portion 212 extending from both sides of the first inclined portion, and arranged to form a first side inclined. ; The reinforcing bar is divided into a second inclined portion 221 and a second horizontal portion 222 extending from both sides of the second inclined portion, and the first side vent root 210 facing the first side vent root 210. 2nd side vent root disposed so as to be inclined toward the side to form a second side surface while the second inclined portion 221 is disposed to cross the first inclined portion 211 of the first side vent root. 220; The rebar is bent and divided into a third inclined portion 231 and a third horizontal portion 232 extending from both sides of the third inclined portion, and the upper portion between the first and second side vents 210 and 220 disposed to face each other. An upper surface disposed horizontally to form a top surface, and each of the third horizontal portions 232 on both sides is tightly installed with the first and second horizontal portions 212 and 222 of the first and second side vents. Vent root 230; A first end butyl root 241 which obliquely connects the first horizontal portion 212 of one end of the first side vent root 210 and the second horizontal portion 222 of one end of the second side vent root 220; The second stage butt root 242 which obliquely connects the first horizontal portion 212 of the other end of the first side vent root 210 and the second horizontal portion 222 of the other end of the second side vent root 220 to the inclined portion. ); The toroidal hollow body 100, The first and second inclined portions (211, 221) of the first and second side vent muscles are formed on each of the opposite sides to be fitted with a fitting groove (140a), the insertion groove is inserted into the reinforcing cage 200 Two-way hollow slab, characterized in that it is restrained by fitting the first and second inclined portion (211, 221) of the first and second side vent root (140a). In claim 6, Each of the first and second side vent roots 210 and 220 and the upper vent root 230 of the reinforcing cage is continuously bent in a trapezoidal shape so that the first, second and third inclined portions 211, 221 and 231 are respectively. A plurality of the ends are provided and both ends are provided to end with the first, second, and third horizontal parts 212, 222, and 232. Two-way hollow slab, characterized in that a plurality of donut-shaped hollow body 100 is inserted into the reinforced cage 200 is constrained. Reinforcing cage 200 is manufactured by assembling the reinforcing bar; A donut-shaped hollow body 100 spaced apart in a plurality of rows in a state constrained inside the reinforcing cage 200; A slab lower reinforcing bar reinforcement with the main bar beneath the reinforcing cage 200; A slab upper reinforcing bar 414 which is disposed in the main bar in a direction parallel to the slab lower reinforcing bar on the reinforcing cage 200; Consists of slab concrete 420 to be cured to a thickness that the upper and lower reinforcing bars (411, 414) is embedded; The reinforcing cage 200, First and second lower horizontal muscles 251 and 252 disposed to be spaced apart from each other in parallel; First and second upper horizontal roots 253 and 254 disposed in parallel with one another at a narrower width than the first and second lower horizontal roots above the first and second lower horizontal roots; The first side tilt muscle 261 is installed to connect the first upper and lower horizontal muscles in an inclined direction along the length direction of the first upper and lower horizontal muscles, and the neighboring members are spaced apart while the inclined directions are reversed. ; A first side tilt in a position opposite to the inclined direction of the first side tilt root, which is installed to be inclined to connect the second upper and lower horizontal roots along the longitudinal direction of the second upper and lower horizontal roots A second side tilt muscle 262 disposed to be staggered with the muscle; Upper butt roots installed to connect the first and second upper horizontal roots in an inclined direction along the longitudinal direction of the first and second upper horizontal roots, and to be connected to the first and second side tilt roots facing each other. 263; A first end butyl root 241 connecting the one end of the first upper horizontal muscle and the one end of the second lower horizontal muscle to be inclined; A second end butt root that obliquely connects the other end of the first upper horizontal muscle and the other end of the second lower horizontal muscle or obliquely connects the other end of the second upper horizontal muscle and the other end of the first lower horizontal muscle The first and second upper and lower horizontal roots 251, 252, 253 and 254 are arranged in a direction crossing the slab upper and lower reinforcing bars 411 and 414. The toroidal hollow body 100, The first and second side tilt roots 261 and 262 are formed in the fitting grooves 140a into which the first and second side tilt roots 261 and 262 are fitted, respectively. The first and second side grooves are inserted into the reinforcing cage 200 and inserted into the fitting grooves 140a. A two-way hollow slab, characterized in that it is constrained as the two-sided tilt roots 261 and 262 are fitted. The method according to any one of claims 6 to 8, The donut-shaped hollow body 100 has a fitting groove 140a of the first and second inclined portions 211 and 221 or the first and second side tilt roots 261 of the first and second side vent roots of the reinforcing cage. , 262 is a two-way hollow slab, characterized in that formed in the X-shape matching the arrangement. A donut-shaped hollow body 100 spacingly arranged in a plurality of rows; Slab lower reinforcing bars (411, 412) which are placed under the donut-shaped hollow body (100) as the main and back muscles; Slab upper reinforcing bars (413, 414) which are placed on the donut-shaped hollow body (100) with the main and reinforcement bars; Reinforcing spacers (300) disposed between the donut-shaped hollow forming bodies (100) and the reinforcement bars (412, 413) of upper and lower reinforcing bars; The slab upper and lower reinforcing bars (411, 412, 413, 414) is a slab concrete pour is cured to a thickness that is embedded; The rebar spacer 300, It is composed of a reinforcing bar binding piece 310 provided to weld or fit fastening with the reinforcement muscles (412, 413); and a protrusion (320) provided to fit with the donut-shaped hollow body; The toroidal hollow body 100, The fitting grooves 140b and 140c are formed to face the upper and lower surfaces of the reinforcing spacers 320, and the protrusions 320 of the reinforcing spacers are fitted into the fitting grooves 140b and 140c. A two-way hollow slab, characterized in that it is restrained by the back muscle (412, 413) according to the load. A method of constructing a two-way hollow slab according to claim 6 or 7, Cross-reinforcing the main bar 411 and the back bar 412 with the slab lower rebar; Disposing the reinforcing cage 200 in the state where the donut-shaped hollow forming body 100 is restrained on the slab lower reinforcing bars; Cross-reinforcing the reinforcement bar 413 and the main bar 414 with the slab upper rebar on the reinforcing cage 200; Pouring and curing the slab concrete 420; Construction method of a two-way hollow slab comprising a. A method of constructing a two-way hollow slab according to claim 8, Reinforcing the main rod 411 with the slab lower reinforcing bars; Reinforcing cage 200 in a state where the donut-shaped hollow body 100 is restrained therein is disposed on the main bar 411 of the slab lower reinforcing bar, and the first and second lower horizontal bars 251 and 252 of the reinforcing cage are slab. Reinforcement to intersect with the main bar 411 of the lower reinforcing bar; Reinforcing the main bar 414 by the slab upper reinforcement on the reinforcing cage 200, the main bar 414 of the slab upper reinforcement so as to cross the first and second upper horizontal bars (253, 254) of the reinforcing cage; Pouring and curing the slab concrete 420; Construction method of a two-way hollow slab comprising a.

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