KR20170069315A - PC slab with lightweight block and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a lightweight block-integrated rib PC slab and a method of manufacturing the same, which can be manufactured by a simple process by placing a lightweight block between adjacent ribs protruding to the lower portion of the upper plate. More particularly, The present invention relates to a lightweight block-integrated rib PC slab capable of exhibiting a sectional strength and minimizing an area to be sprayed, and a manufacturing method thereof.
The lightweight block-integrated rib PC slab of the present invention comprises: a top plate; A plurality of ribs formed at one side or both sides of the upper plate in a longitudinal direction so as to be spaced apart from each other by a predetermined distance; And a lightweight block provided between adjacent ribs and fixed by the locking part; .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a lightweight block-integrated rib PC slab and a manufacturing method thereof,

The present invention relates to a lightweight block-integrated rib PC slab and a method of manufacturing the same, which can be manufactured by a simple process by placing a lightweight block between adjacent ribs protruding to the lower portion of the upper plate. More particularly, The present invention relates to a lightweight block-integrated rib PC slab capable of exerting a sectional strength and minimizing an area to be sprayed, and a manufacturing method thereof.

Large structures such as logistics warehouses, freezing warehouses, large marts and other large scale structures must have a long span length and a large load and large slab dancing. However, as the slab dancing increases, the weight of the slab increases, resulting in an additional load burden.

Therefore, in order to improve this, a PC slab 1 having a rib formed at the lower part thereof such as the double-tee system (DTS) shown in Fig. 1 is used (Japanese Patent No. 10-1304335). The double-tee system is a PC slab having a double tee-shaped cross section, and has a small cross-section and can exhibit a large bending strength.

However, the double tee system is required to be sprayed on the bottom surface of the slab for heat insulation or refractory performance.

Alternatively, as shown in FIG. 2, a rib-plus system has been developed in which light weight material 13 is placed between adjacent ribs to increase the dancing and reduce the weight of the slab.

However, the PC slab 1 shown in Fig. 2 has a structure in which the lightweight material 13 is installed after the placement and curing of the bottom plate concrete as shown in Fig. 3 (a), and then the ribs and the top plate concrete And then putting it in the process. Therefore, since concrete is poured twice, there is a disadvantage that it is cumbersome to manufacture and takes a long time.

In addition, since the thickness of the upper plate on the light weight material 13 is thin, the weight of the poured concrete is small when the upper concrete is poured, so that the lightweight material can float by buoyancy. Therefore, a separate device must be installed to prevent the lightweight material from being injured.

In addition, since the lower tensile force of the slab is a burden of the lower tensile force and the upper compressive force of the concrete is borne by the concrete, there is a problem that the above-mentioned prior art in which the concrete area of the lower plate is widened has a structural efficiency deteriorating.

In order to solve the above-mentioned problems, the present invention provides a lightweight block-integrated rib PC slab capable of increasing the slab dancing and exhibiting a large sectional strength while reducing the weight of the slab and minimizing the area of lower spraying, and a manufacturing method thereof.

The present invention provides a lightweight block-integrated rib PC slab capable of completing the production of a PC slab excellent in sectional strength even by pouring concrete once, and a manufacturing method thereof.

The present invention provides a lightweight block-integrated rib PC slab and a method of manufacturing the same, which can prevent the light block located between adjacent ribs from being lifted when the concrete is poured.

According to a preferred embodiment of the present invention, A plurality of ribs formed at one side or both sides of the upper plate in a longitudinal direction so as to be spaced apart from each other by a predetermined distance; And a lightweight block provided between adjacent ribs and fixed by the locking part; The present invention provides a lightweight block-integrated rib PC slab.

According to another preferred embodiment of the present invention, there is provided a lightweight block-integrated rib PC slab wherein the latching portion is protruded from a lower side of a rib.

According to another preferred embodiment of the present invention, there is provided a lightweight block integrated rib PC slab, wherein the locking part is protruded or depressed on an intermediate side of the rib.

According to another preferred embodiment of the present invention, there is provided a lightweight block-integrated rib PC slab in which the latching portion is formed in a saw-tooth shape on a side surface of a rib.

According to another preferred embodiment of the present invention, there is provided a lightweight block-integrated rib PC slab, wherein the lightweight block is protruded downward from the ribs by a predetermined length.

According to another preferred embodiment of the present invention, the ribs are formed to be shorter than the top plate by a predetermined length, so that a step portion is formed at both ends of the rib PC-integrated type rib PC slab.

According to another aspect of the present invention, there is provided a lightweight block integrated type lightening device, characterized in that a protruding step is formed in a side lower portion of a rib positioned at the outermost side and an upper side surface of a top plate so that a concrete filling groove is formed between adjacent PC slabs Provide rib PC slabs.

According to another preferred embodiment of the present invention, there is provided a lightweight block-integrated rib PC slab, wherein leak-barrier walls are formed outside the longitudinally opposite ends of the outermost ribs.

According to another preferred embodiment of the present invention, both ends of the top plate are thickly formed.

According to another preferred embodiment of the present invention, there is provided a lightweight block-integrated rib PC slab, wherein a plurality of pocket portions are formed on a top surface of the thick end portion of the top plate.

According to another preferred embodiment of the present invention, there is provided a lightweight block-integrated rib PC slab wherein the lightweight block is EPS.

According to a preferred embodiment of the present invention, there is provided a method of manufacturing a mold, comprising the steps of: (a) preparing a mold having a plurality of auxiliary plates longitudinally fixed on a top surface of a floor mold, (b) installing a light block having a width larger than that of the assisting plate on each of the assisting plates; (c) placing reinforcing bars between the lightweight blocks and the top of the lightweight blocks; (d) casting the concrete between the lightweight blocks and the upper space of the lightweight block; And (e) demolding the form mold after concrete curing; The present invention provides a method of manufacturing a lightweight block-integrated rib PC slab.

The present invention has the following effects.

First, a light block is filled between adjacent ribs protruding to the lower portion of the upper plate. Therefore, it is possible to increase the slab dancing and to exert a large sectional strength while reducing the weight of the slab, and minimizing the protruding portion of the lower surface of the PC slab to minimize the area to be sprayed.

Second, it is possible to complete the production of PC slabs only by fixing the light block on the upper side of the formwork and then casting the concrete once. Therefore, it is easy to manufacture and shorten the production time, which is economical.

Third, since the thickness of the top plate on the upper part of the light block can be increased to increase the weight of the poured concrete, it is possible to naturally prevent the light block from floating due to the weight of the concrete.

Fourth, the ribs are formed at the bottom of the PC slabs to optimize the structural performance, minimize the weight of the slabs, and reduce the number of rungs at the time of construction, thus providing excellent workability and economical efficiency.

1 is a sectional view showing an embodiment of a conventional PC slab;
2 is a sectional view showing another embodiment of a conventional PC slab;
3 is a cross-sectional view showing a manufacturing procedure of the PC slab shown in Fig.
4 is a cross-sectional view of a lightweight block-integrated rib PC slab of the present invention.
5 is a cross-sectional view of a lightweight block-integrated rib PC slab of the present invention having a protruding locking portion.
6 is a cross-sectional view of a lightweight block-integrated rib PC slab of the present invention in which a depression latching portion is formed;
7 is a cross-sectional view of a lightweight block-integrated rib PC slab of the present invention in which a serration-shaped engagement portion is formed;
8 is a cross-sectional view of a lightweight block integral rib PC slab of the present invention having a light block protruding downward;
9 is a view showing a lightweight block-integrated rib PC slab of the present invention having a step portion formed therein;
10 is a sectional view of a lightweight block-integrated rib PC slab of the present invention in which a concrete filling groove is formed;
11 is a bottom perspective view of a light block integral type rib PC slab of the present invention in which a leakage preventing wall is formed;
12 is a perspective view of a lightweight block-integrated rib PC slab of the present invention in which a pocket portion is formed;
13 is a cross-sectional view showing the detail of joining of adjacent PC slabs;
Fig. 14 is a view showing a step-by-step process of a method of manufacturing a light block integral type rib PC slab of the present invention.

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

4 is a sectional view of a light block integral type rib PC slab of the present invention.

The lightweight block-integrated rib PC slab of the present invention comprises a top plate 11; A plurality of ribs 12 formed at one side or both sides of the upper plate 11 so as to be spaced apart from each other by a predetermined distance in the longitudinal direction and having latching portions 121 formed thereon; And a light block (13) provided between the adjacent ribs (12), the light block (13) being fixed by the latching part (121); .

The lightweight block-integrated rib PC slab of the present invention comprising the top plate 11, the rib 12 and the lightweight block 13 is manufactured in advance in a factory such as a factory,

The ribs 12 may be formed under the PC slab 1 to reduce the weight of the slab while optimizing the structural performance of the slab. Therefore, it is possible to minimize the number of runways during construction.

The engaging portion 121 of the rib 12 can be protruded or depressed.

As shown in FIG. 4, the latching part 121 may protrude from a lower side of the rib 12.

In this case, since the lightweight block 13 having a rectangular parallelepiped shape can be inserted into the upper portion of the locking portion 121, the lightweight lightweight block 13 can be used as it is, which is economical.

The light block 13 is for reducing the weight of the PC slab 1 and the light block 13 may be made of expanded polystyrene (EPS).

The lightweight block 13 may be made of synthetic resin, paper, wood or the like which can reduce the weight of the PC slab 1.

Especially, in a refrigeration warehouse requiring insulation, EPS (expanded polystyrene) is used as a lightweight block 13, and therefore it is not necessary to separately provide a heat insulating material between the ribs 12. That is, it is possible to provide a PC slab integrated with a heat insulating material.

As described above, in the present invention, since the ribs 12 protrude downward from the top plate 11 and the lightweight block 13 is filled between the adjacent ribs 12, the portion projecting to the lower surface of the PC slab 1 is minimized can do.

In addition, since only the lower portion of the rib 12 is provided with the adiabatic spray 18, the sprayed area can be minimized.

The lightweight block-integrated rib PC slab of the present invention can simultaneously form the top plate 11 and the rib 12 by fixing the lightweight block 13 on the upper surface of the mold and pouring the concrete once. Therefore, the production of the PC slab 1 is simple and the production time can be shortened.

Since the thickness of the upper plate 11 on the light block 13 can be increased, the weight of the poured concrete can be increased to naturally prevent the lightweight block 13 from being lifted.

9, 12, and the like, a fixing steel bar 16 such as a truss root can be exposed to the top plate 11 for integration with the topping concrete 3 placed in the field.

Although not shown in the drawing, the end fixing bar may be exposed at the end of the top plate 11 for forming a continuous end.

FIG. 5 is a sectional view of a lightweight block-integrated rib PC slab of the present invention on which a protruding locking portion is formed, and FIG. 6 is a sectional view of a lightweight block-integrated rib PC slab of the present invention on which a recess locking portion is formed.

The engaging portion 121 may protrude or sink into the intermediate side of the rib 12.

5 shows an engaging portion 121 protruding from the intermediate side of the rib 12, and FIG. 6 shows the engaging portion 121 formed on the intermediate side of the rib 12.

Since the lightweight block 13 is spread on the upper part of the locking part 121 protruding from the lower side of the rib 12 shown in FIG. 4, the gap between the rib 12 and the lightweight block 13 There is a step on the surface.

The step difference is not large, but the area to be sprayed by the step difference may increase.

Therefore, if the side surface of the lightweight block 13 is formed to engage with the engaging portion 121 formed on the intermediate side surface of the rib 12 as in the embodiment of FIG. 5 or 6, the lower surface of the lightweight block 13 and the lower surface of the rib 12 Levels can be matched. As a result, it is possible to improve the appearance and reduce the area of the adiabatic spray 18.

7 is a cross-sectional view of a lightweight block-integrated rib PC slab of the present invention in which a toothed latching portion is formed.

As shown in FIG. 7, the latching portion 121 may be formed in a saw-tooth shape on the side surface of the rib 12.

When the side surface of the light block 13 is machined to have a serrated shape so as to engage with the serrated engaging portion 121 formed on the side surface of the rib 12 and then the concrete is laid, Is engaged with the side surface of the rib 12.

Therefore, the lightweight block 13 can be firmly fixed.

8 is a cross-sectional view of a lightweight block integrated rib PC slab of the present invention provided with a light block protruding downward.

The light weight block 13 may be formed to be lower than the rib 12 in the case where the engaging portion 121 is protruded or depressed on the intermediate side surface of the rib 12 or in the form of saw tooth on the side surface of the rib 12 It can be configured to protrude a predetermined length.

8, when the adiabatic spray 18 is formed below the PC slab 1, the lower portion of the rib 12 between the adjacent light blocks 13 is sprayed so that the lower surface of the PC slab 1 It can be formed flat.

As a result, it is possible to improve the aesthetics and to minimize the sprayed area.

9 is a view showing a light block integral type rib PC slab of the present invention in which a step portion is formed.

9 (a) to 9 (b), the ribs 12 are formed to be shorter than the top plate 11 by a predetermined length so that the step portions 14 engaged with the beams 2 are formed at both ends Can be configured.

The step portion 14 is mounted to catch on the upper side of the beam 2. Therefore, since the rib 12 of the PC slab 1 is located on the side of the beam 2, it is possible to reduce the floor height.

The step portion 14 is formed at both ends of the PC slab 1.

10 is a sectional view of a lightweight block-integrated rib PC slab according to the present invention in which a concrete filling groove is formed.

As shown in FIG. 10, protrusions (not shown) are formed on the lower side of the ribs 12 located at the outermost portion and the upper side surfaces of the upper plate 11 so as to form the concrete filling grooves 15 between adjacent PC slabs 1 The jaws 111 and 122 can be formed.

After the plurality of PC slabs 1 are mounted on the upper portion of the beam 2, the topping concrete 3 is installed on the upper plate 11.

At this time, if the concrete filled in the concrete filling groove 15 is filled with concrete, it can serve as a shear key.

The protrusions 111 formed on the side surface of the top plate 11 are formed to be shorter than the protrusions 122 formed on the bottom of the side surface of the rib 12 so that the cast concrete filled in the concrete filling grooves 15 can be smoothly filled. desirable.

11 is a bottom perspective view of a light block integral type rib PC slab of the present invention in which a leakage preventing wall is formed.

As shown in FIG. 11, leakage preventing walls 123 may be formed on the outer sides of both ends in the longitudinal direction of the outermost ribs 12.

The topping concrete 3 placed in the field can leak into the space between the beam 2 and the rib 12 through the concrete filling groove 15, that is, the space under the step 14. Therefore, leakage-preventing walls 123 are formed on the outer sides of the outermost ribs 12 in the longitudinal direction to prevent leakage of the topping concrete 3.

The leakage preventing wall 123 is formed so as to protrude to the same length as the projecting step 122 formed on the lower side of the rib 12 and can be configured to abut the adjacent PC slab 1.

In addition, when the end of the PC slab 1 is formed as a continuous stage, the lower portion of the slab is subjected to a compressive force. The leakage preventing wall 123 reinforces the lower compression area at both ends of the PC slab 1, so that it is possible to reinforce the mortar.

Fig. 12 is a perspective view of a lightweight block-integrated rib PC slab of the present invention on which a pocket portion is formed, and Fig. 13 is a cross-sectional view showing details of joining of adjacent PC slabs.

As shown in FIGS. 12 and 13, both ends of the top plate 11 may be formed thick.

Both ends of the thicker reinforced top plate 11 serve to reinforce the end portions of the PC slab 1 having a large shearing force.

At this time, the thickness of the light block 13 is made thin at both end portions where the thickness of the top plate 11 is thick, and the thickness of the light block 13 is made thick at the central portion where the thickness of the top plate 11 is thin can do.

In addition, a plurality of pocket portions 112 may be formed on the upper end surface of the upper plate 11, which is thick.

Thus, when the PC slab 1 and the beam 2 are jointed, the top of the beam 2 and the inside of the pocket 112 are filled with the cast concrete so that the PC slab 1 and the beam 2 can be integrated. At this time, the front portion of the PC slab 1 may be reinforced by providing a reinforcing bar R for reinforcing the front portion connected to the upper portion of the beam 2 in the pocket portion 112. [

Fig. 14 is a view showing a step-by-step process of the method for manufacturing a light block integrated type rib PC slab of the present invention.

A method of manufacturing a lightweight block-integrated rib PC slab according to the present invention comprises the steps of: (a) preparing a formwork mold (4) having a plurality of support plates (42) fixed longitudinally on a top surface of a floor mold (41) ; (b) installing a light block (13) having a larger width than the assisting plate (42) on each of the assisting plates (42); (c) placing a reinforcing bar (R) between the light blocks (13) and on the light block (13); (d) placing the concrete (C) between the light blocks (13) and the space above the light blocks (13); And (e) demolding the mold (4) after concrete (C) curing; And a control unit.

14 (a) to 14 (e) show respective steps of a method of manufacturing a light block integrated type rib PC slab according to the present invention, and a PC slab 1 manufactured through FIGS. 14 (a) 4 is a PC slab 1 in which a locking part 121 is protruded from the bottom of the side surface of the rib 12 as shown in Fig.

Since the width of the light block 13 is larger than the width of the auxiliary plate 42 in the step (b), the latching part 121 is formed at both lower ends of the light block 13 when the die mold 4 is removed.

In the present invention, the PC slab 1 can be manufactured by placing the lightweight block 13 on the formwork mold 4 and completing the installation of the reinforcing bars R, and then placing and curing the concrete C once in the step (d) Therefore, the lightweight block-integrated rib PC slab 1 of the present invention can be manufactured by a simple process.

1: PC slab 11: Top plate
111: protruding jaw 112: pocket portion
12: rib 121:
122: protruding jaw 123: leak-proof wall
13: Lightweight block 14:
15: Concrete filling groove 16: Fixed reinforcing bar
18: Adiabatic spraying 2: Bo
3: Topping concrete 4: Formwork mold
41: floor mold 42:
C: Concrete R: Reinforced

Claims (12)

An upper plate 11;
A plurality of ribs 12 formed at one side or both sides of the upper plate 11 so as to be spaced apart from each other by a predetermined distance in the longitudinal direction and having latching portions 121 formed thereon; And
A light block 13 provided between the adjacent ribs 12 and fixed by the locking part 121; Wherein the slab-type rib PC-integrated slab-type rib PC slab comprises a plurality of slabs.
The method of claim 1,
Wherein the locking part (121) is protruded from a bottom of a side surface of the rib (12).
The method of claim 1,
Wherein the locking part (121) is protruded or depressed on an intermediate side surface of the rib (12).
The method of claim 1,
Wherein the locking part (121) is formed in a saw-tooth shape on a side surface of the rib (12).
4. The method according to claim 3 or 4,
Wherein the light block (13) is protruded from the rib (12) by a predetermined length below the rib (12).
The method of claim 1,
Wherein the ribs (12) are formed to be shorter than the top plate (11) by a predetermined length so that the step portions (14) engaged with the beams (2) are formed at both ends.
The method of claim 6,
Protrusions 111 and 122 are formed on the lower side of the rib 12 positioned at the outermost side and the upper side surface of the upper plate 11 so that the concrete filling grooves 15 are formed between the adjacent PC slabs 1 Wherein the lightweight block-integrated rib PC slabs are lightweight block-integrated rib PC slabs.
8. The method of claim 7,
And a leakage preventing wall (123) is formed outside the longitudinally opposite ends of the outermost rib (12).
The method of claim 1,
Wherein both end portions of the top plate (11) are thickly formed.
The method of claim 9,
Wherein a plurality of pocket portions (112) are formed on an upper end surface of the thick end portion of the top plate (11).
The method of claim 1,
Wherein the lightweight block (13) is an EPS.
(a) preparing a mold (4) having a plurality of auxiliary plates (42) fixed in the longitudinal direction on the upper surface of the floor mold (41) so as to be spaced apart from each other by a predetermined distance in the width direction;
(b) installing a light block (13) having a larger width than the assisting plate (42) on each of the assisting plates (42);
(c) placing a reinforcing bar (R) between the light blocks (13) and on the light block (13);
(d) placing the concrete (C) between the light blocks (13) and the space above the light blocks (13); And
(e) demolding the mold (4) after concrete (C) curing; Wherein the slab-based rib PC slab comprises a plurality of slabs.

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