KR102637708B1 - Vibration and noise insulation method of floor slab using underflooring for floor noise reduction - Google Patents

Abstract

The present invention applies a formwork for a joist slab to form a one-way or two-way joist structure, causes plate vibration in the concave space of the joist to eliminate low-frequency noise, and absorbs mid- and high-pitched sounds by using a sound-absorbing plate made of porous or porous material. We provide a construction method for a floor slab to reduce inter-floor noise using joists to reduce inter-floor noise by installing a sound-absorbing unit that can absorb vibration noise in the area and improve insulation performance depending on the materials used.
A method of constructing a floor slab for reducing inter-floor noise using joists according to a suitable embodiment of the present invention includes the steps of installing a formwork for the joist slab so that joists are formed on the entire lower surface of the construction layer; Placing rebar into the upper part of the form for the joist slab and then pouring concrete; After curing the concrete, dismantling and demolding the remaining members except the through bolts assembled in the joist slab form to form a concave joist groove in the lower part of the floor slab; It is characterized in that the construction includes the step of installing a sound-absorbing unit that is assembled with a through bolt in the joist groove of the floor slab and eliminates low-frequency noise and absorbs vibration noise in the mid- and high-pitched range.

Description

Construction method of floor slab for inter-floor noise reduction using joists {Vibration and noise insulation method of floor slab using underflooring for floor noise reduction}

The present invention relates to a method of constructing a slab for reducing inter-floor noise applied to the slab of an apartment complex where inter-floor noise is a problem. In particular, a formwork for a joist slab is applied to form a one-way or two-way joist structure and a concave space of the joist is formed. This relates to a method of constructing a floor slab for reducing inter-floor noise using joists that reduces inter-floor noise by installing a sound-absorbing unit that can reduce inter-floor noise and improves insulation performance depending on the materials used.

Noise between floors in apartment complexes is a factor that causes conflict between neighbors and is emerging as a major social problem that can lead to murder in the worst case. Interfloor noise reduction technologies that have been available to date mainly consist of technologies that reduce the amount of impact transmitted to the slab by installing interfloor noise prevention materials (such as rubber or EPS materials) on the top of the slab. However, inter-floor noise is vibration noise generated when the slab vibrates. Unless the impact is significantly reduced through inter-floor noise prevention materials, the effect of reducing inter-floor noise is low, and even a small amount of impact that can cause the slab to vibrate can cause inter-floor noise. there is. In particular, there are limits to preventing vibration noise in the low-frequency range, which is most unpleasant to people, with inter-floor noise prevention materials. Recently, when vibration in the low-frequency range occurs due to footsteps, etc., a sensor detects the magnitude of the vibration and installs a device at the bottom of the slab to reduce the vibration of the slab. A device has been developed to reduce inter-floor noise by vibration control. However, this device requires a continuous supply of electricity, and maintenance is difficult due to the burden of dismantling and repairing the ceiling if the device breaks down.

The technology behind the present invention is Korean Patent No. 10-0691518, which includes ‘ceiling-floor-mounted inter-floor noise reduction device using cantilever-type multi-tuned mass attenuator’ (Patent Document 1). This is a technology to reduce inter-floor noise caused by plate vibration of the slab using a cantilever-type multi-tuned mass attenuator. It is a method of installing a weight of 1 to 2% of the mass of the floor plate on the floor plate to have rigidity and damping. This is a method of actively controlling vibration noise generated from the lower part of the slab. However, this device requires continuous maintenance and has the problem of having to dismantle the ceiling when repairing a malfunction.

Another background technology that forms the background of the present invention is Korean Patent No. 10-1113485, 'Insulating Sound Absorbing Plate' (Patent Document 2). In the above background technology, an insulating sound-absorbing board is installed on the ceiling to block noise generated indoors from going outside and ensure insulation performance that prevents internal heat from leaking to the outside. However, the above background technology can only block noise and heat generated internally and cannot ensure performance against inter-floor noise and insulation performance coming from the outside.

Korean Patent No. 10-0691518 Korean Patent No. 10-1113485

The present invention applies a formwork for a joist slab to form a one-way or two-way joist structure, causes plate vibration in the concave space of the joist to eliminate low-frequency noise, and absorbs mid- and high-pitched sounds by using a sound-absorbing plate made of porous or porous material. The purpose is to provide a method of constructing a floor slab for reducing inter-floor noise using joists that can reduce inter-floor noise by installing a sound-absorbing unit that can absorb vibration noise in the area and improve insulation performance depending on the materials used. there is.

The construction method of a floor slab for reducing interfloor noise using joists according to a suitable embodiment of the present invention is,

Installing formwork for the joist slab so that the joist is formed on the entire lower surface area of the construction layer; Placing rebar into the upper part of the form for the joist slab and then pouring concrete; After curing the concrete, dismantling and demolding the remaining members except the through bolts assembled in the joist slab form to form a concave joist groove in the lower part of the floor slab; It is characterized in that the construction includes the step of installing a sound-absorbing unit that is assembled with a through bolt in the joist groove of the floor slab and eliminates low-frequency noise and absorbs vibration noise in the mid- and high-pitched range.

In addition, the formwork for the joist slab includes an upper cap having a constant unit length; A height-adjusting intermediate material installed between the upper cap and the lower base material for positioning to adjust the height of the floor slab; A lower base material for positioning that is coupled to the lower surface of the intermediate material for height adjustment; Penetrating bolts that integrate the formwork for the joist slab by inserting the upper cap, the intermediate material for height adjustment, and the lower base material for positioning; It is characterized by including a lower support material that supports the lower base material for positioning arranged in the direction of the joist from the lower part.

In addition, the sound-absorbing unit includes a vibrating plate that spans the joist groove and dissipates low-frequency noise due to impact load into plate vibration energy; A spacer for fixing the position of the vibrating sheet positioned on the bottom of the vibrating sheet to support the vibrating sheet in the joist groove; It is characterized by including; a sound-absorbing plate made of a porous or porous material that is located on the lower surface of the spacer for fixing the position of the vibrating sheet and is assembled by a through bolt to absorb vibration noise in the mid- and high-pitched range.

In addition, the joist groove formed in the floor slab is characterized in that it is formed in one direction or two directions.

Meanwhile, the vibration noise blocking structure of the floor slab for reducing inter-floor noise using joists according to the present invention has a joist groove concave in one or two directions formed on the lower surface of the floor slab, and one end of a through bolt along the joist groove. buried and installed; It is composed of a vibrating sheet that is inserted into the through bolt and dissipates low frequency noise due to impact load into plate vibration energy, a spacer for fixing the position of the vibrating sheet, and a sound-absorbing plate that absorbs vibration noise in the mid- and high-pitched ranges assembled at the lower part of the joist groove. It is characterized by

In addition, in the joist groove, between the lower surface of the floor slab and the vibrating sheet, and between the vibrating sheet and the sound-absorbing sheet, there is a space between the upper and lower plate vibrations to induce plate vibration of the vibrating sheet.

In addition, the sound-absorbing plate is characterized by being manufactured containing a porous or porous material that absorbs vibration noise in the mid- and high-pitched range.

According to the construction method of a floor slab for reducing inter-floor noise using joists of the present invention, a 1-way or 2-way joist structure with a concave joist groove at the bottom of the floor slab can be formed by applying formwork for a joist slab. In addition, the depth of the joist groove and the dance of the floor slab can be adjusted together by the intermediate material for height adjustment, thereby improving the bending rigidity of the floor slab.

In addition, when an impact load occurs on the floor slab, the vibrating plate installed in the concave space of the joist causes plate vibration by itself due to the surrounding space, thereby extinguishing low-frequency noise. In addition, sound-absorbing plates made of porous or porous materials can absorb vibration noise in the mid- and high-pitched range, thereby significantly reducing inter-floor noise. In addition, it has the additional advantage of improving the insulation performance of the floor slab depending on the material used for the sound-absorbing plate.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention along with the detailed description of the invention. Therefore, the present invention is limited to the matters described in the attached drawings. It should not be interpreted as limited.
Figure 1 is a cross-sectional view of a floor slab for reducing inter-floor noise using joists according to an embodiment of the present invention.
Vibration noise blocking structure and construction method
Figure 2 is a perspective view showing the process of installing a sound-absorbing unit in a state in which one-way joist grooves are arranged on the floor slab of Figure 1.
Figure 3 is a perspective view showing the process of installing a sound-absorbing unit in a state in which two-way joist grooves are arranged on the floor slab of Figure 1.
Figures 4a to 4d are construction flowcharts of floor slabs for reducing inter-floor noise using joists according to an embodiment of the present invention.
Figure 5 is an exploded perspective view of a formwork for a joist slab for having a one-way joist groove in a floor slab according to an embodiment of the present invention.
Figure 6 is a perspective view showing the construction process of the formwork for the joist slab shown in Figure 5.
Figure 7 is an exploded perspective view of a formwork for a joist slab for having a two-way joist groove in a floor slab according to another embodiment of the present invention.
Figure 8 is a perspective view showing the construction process of the formwork for the joist slab shown in Figure 7.
Figure 9 (A) is a diagram showing the transfer state of the impact load of a conventional floor slab, and (B) is a schematic diagram schematically showing the transfer state of the impact load of the floor slab for reducing inter-floor noise according to the present invention.

Below, the present invention will be described in detail with reference to embodiments shown in the attached drawings, but the presented embodiments are illustrative for a clear understanding of the present invention, and the present invention is not limited thereto.

First, as shown in Figures 1 to 3, the vibration noise blocking structure of the floor slab for reducing inter-floor noise using joists has a concave joist groove 102 formed on the lower surface of the floor slab 100 and is formed along the joist groove 102. One end of the through bolt (14) is installed buried.

Here, the joist groove 102 may be formed in one direction as shown in FIG. 2 or in two directions as shown in FIG. 3 . In the two-way case, the joist grooves 102 can be understood as a grid arrangement.

In addition, a sound-absorbing unit 30 is installed in the joist groove 102 to absorb low-frequency noise and vibration noise in the mid- and high-pitched range. That is, the vibrating sheet 31 is inserted into the through bolt 14 and dissipates low-frequency noise due to impact load into plate vibration energy, the spacer 32 for fixing the position of the vibrating sheet, and the vibration noise in the mid- and high-pitched range are absorbed. A sound-absorbing unit 30 made of a sound-absorbing plate 33 is sequentially assembled into the joist groove 102.

Here, between the lower surface of the floor slab 100 and the vibrating thin plate 31 in the joist groove 102, there is a constant plate vibration gap G1 to induce plate vibration of the vibrating thin plate 31. In addition, between the vibrating thin plate 31 and the sound-absorbing plate 33, there is a spacer G2 between the vibrating thin plate and the spacer 32 for fixing the position of the vibrating thin plate. The vibrating sheet 31 may be made of vinyl sheet, plastic sheet, metal sheet, etc. Therefore, when an impact load is generated on the floor slab 100, plate vibration is induced in the vibrating thin plate 31, thereby extinguishing low-frequency noise generated from the impact load.

In addition, the sound-absorbing plate 33 is preferably made of a porous or porous material that absorbs vibration noise in the mid- and high-pitched range. Here, the porous material may be mineral wool, polyester, polyurethane, lightweight foam concrete, etc., and the porous material may be plywood, MDF, or perforated metal plate.

In this way, in the vibration noise blocking structure of the floor slab for inter-floor noise reduction using joists, as shown in Figure 9 (B), when an impact load occurs on the floor slab, the vibrating sheet (31) is primarily installed in the concave joist groove (102) of the joist. ), plate vibration is induced by the surrounding space and the low-frequency noise is eliminated. Additionally, the sound-absorbing plate 33 made of a porous or porous material secondarily absorbs vibration noise in the mid- and high-pitched range, thereby significantly reducing inter-floor noise. Therefore, in the case of a general floor slab as shown in Figure 9 (A), the impact load is all transmitted to the wall, but as shown in Figure 9 (B) of the present invention, the impact load of the floor slab is transmitted to the vibrating thin plate 31 and the sound-absorbing plate 33. This reduces inter-floor noise and prevents it.

We explain the construction method to have a vibration noise blocking structure for floor slabs to reduce inter-floor noise using such joists.

First, as shown in Figure 4a, the form 10 for the joist slab is installed so that the joist is formed on the entire lower surface area of the construction layer.

The formwork 10 for the joist slab is installed between the upper cap 11 having a constant unit length as shown in Figures 5 and 7, and the upper cap 11 and the lower base material 13 for positioning to form a floor slab ( A height adjustment intermediate material 12 that adjusts the dance height (h) of 100), a position fixing lower base material 13 and an upper cap 11 coupled to the lower surface of the height adjustment intermediate material 12, and a height adjustment intermediate material ( 12), a through bolt (14) that inserts the lower base material (13) for position fixation and integrates the formwork (10) for the joist slab, and supports the lower base material (13) for position fixation arranged in the direction of the joist from the bottom. It is configured to include a lower support member (15). Of course, when constructing a one-way joist, a finish plate 17 may be additionally installed on the formwork 10 for the joist slab to prevent concrete from being filled into the joist groove 102 during concrete pouring.

Here, the height adjustment intermediate material 12 can adjust the dance height (h) of the floor slab 100, so that not only can the bending rigidity of the floor slab 100 be increased, but the joist groove 102 can be deepened, and the post-installation A large gap is created between the vibrating thin plate 31 and the sound absorption and dissipation amount due to the vibration of the vibrating thin plate 31 due to the floor impact load can be increased.

The lower support member 15 of the form 10 for the joist slab is supported through the yoke 4 and the brace 2.

Next, as shown in FIG. 4b, reinforcing bars 20 are placed in the upper part of the form 10 for the joist slab, and then concrete is poured.

Next, as shown in Figure 4c, after curing the concrete, the floor slab 100 is constructed by dismantling and demolding the remaining members except the through bolts 14 assembled in the formwork 10 for the joist slab. That is, the formwork for the joist slab (10) is disassembled in the order of the lower support material (15) excluding the through bolt (14), the lower base material for positioning (13), the intermediate material for height adjustment (12), and the upper cap (11). do.

Next, as shown in FIG. 4D, a sound-absorbing unit ( 30) Install.

As shown in Figures 2 and 3, the sound-absorbing unit 30 includes a vibrating sheet 31 that spans the joist groove 102 and dissipates low-frequency noise due to impact load into plate vibration energy, and is installed on the bottom of the vibrating sheet 31. A hollow spacer 32 for fixing the position of the vibrating sheet 31 is positioned to support the vibrating sheet 31 in the joist groove 102, and is located on the lower surface of the spacer 32 for fixing the position of the vibrating sheet, and at the same time, a through bolt ( 14) is assembled and installed in that order, the sound-absorbing plate 33 made of porous or porous material that absorbs vibration noise in the mid- and high-pitched range.

Therefore, a joist groove 102 that is concave in one direction as shown in FIG. 2 or two directions as shown in FIG. 3 is formed on the lower surface of the floor slab 100, and at the same time, one end of the through bolt 14 is buried along the joist groove 102. Construction is done.

In addition, a vibrating thin plate (31) that is inserted into the through bolt (14) to dissipate low-frequency noise due to impact load into plate vibration energy, a spacer (32) for fixing the position of the vibrating thin plate, and a spacer (32) that absorbs vibration noise in the mid- and high-pitched ranges. The sound-absorbing plate 33 is sequentially assembled to the lower part of the joist groove 102 on the floor slab 100 side.

Therefore, when an impact load occurs on the floor slab 100, the plate vibration gap (G1) and plate vibration occur between the lower part of the floor slab 100, the vibration sheet 31, and the vibration sheet 31 and the sound-absorbing plate 33. A lower gap (G2) exists, and as a result, the vibrating thin plate 31 dissipates low-frequency noise into plate vibration energy. In addition, the sound-absorbing plate 33 absorbs vibration noise in the mid- and high-pitched range, thereby maximizing the sound absorption efficiency of vibration noise.

According to the construction method of the floor slab for reducing inter-floor noise using the joist of the present invention, the joist is easily formed through the formwork 10 for the joist slab, and the joist is formed in the concave joist groove 102 of the joist formed thereby. By installing the sound-absorbing unit (30), we have a floor structure that effectively blocks vibration noise generated from the upper floor, so that the impact load is absorbed and dissipated through the joist through the vibration sheet (31) and sound-absorbing plate (33), thereby eliminating the noise generated in the wall. can be greatly reduced.

So far, the present invention has been described in detail with reference to the presented embodiments, but those skilled in the art can make various variations and modifications without departing from the technical spirit of the present invention with reference to the presented embodiments. will be. The present invention is not limited by such variations and modifications, but is limited by the claims appended below.

10: Formwork for joist slab
11: upper cap
12: Intermediate material for height adjustment
13: Lower base material
14: Through bolt
15: Lower support material
30: Sound absorption unit
31: Vibrating sheet
32: Spacer for position fixing
33: sound absorbing plate
100: Joist slab
102: Joist groove

Claims (7)

Installing the formwork 10 for the joist slab so that the joist is formed on the entire lower surface area of the construction layer;
placing reinforcing bars (20) in the upper part of the formwork (10) for the joist slab and then pouring concrete;
After curing the concrete, dismantling and demolding the remaining members except the through bolts 14 assembled in the joist slab form 10 to form a concave joist groove 102 in the lower part of the floor slab 100;
Including the step of installing a sound-absorbing unit 30, which is assembled with a through bolt 14 in the joist groove 102 of the floor slab 100 and eliminates low-frequency noise and absorbs vibration noise in the mid- and high-pitched range. It is constructed,
The formwork 10 for a joist slab includes an upper cap 11 having a constant unit length; A height-adjusting intermediate material (12) installed between the upper cap (11) and the lower base material (13) for position fixing to adjust the dance height (h) of the floor slab (100); A lower base material (13) for position fixing coupled to the lower surface of the intermediate material (12) for height adjustment; A through bolt (14) that integrates the formwork (10) for the joist slab by inserting the upper cap (11), the intermediate material (12) for height adjustment, and the lower base material (13) for positioning; A method of constructing a floor slab for reducing inter-floor noise using joists, comprising a lower support material (15) that supports the lower base material (13) for positioning arranged in the direction of the joists from the bottom. delete According to clause 1,
The sound absorption unit (30) is
A vibrating thin plate (31) that spans the joist groove (102) and dissipates low-frequency noise due to impact load into plate vibration energy;
A spacer 32 for fixing the position of the vibrating thin plate located on the bottom of the vibrating thin plate 31 to support the vibrating thin plate 31 in the joist groove 102;
A sound-absorbing plate (33) made of a porous or porous material that is located on the lower surface of the spacer (32) for fixing the position of the vibrating sheet and is assembled with a through bolt (14) to absorb vibration noise in the mid- and high-pitched range. A method of constructing a floor slab for reducing inter-floor noise using joists, characterized in that: According to clause 1,
A method of constructing a floor slab for reducing inter-floor noise using joists, wherein the joist grooves 102 formed in the floor slab 100 are formed in one direction or two directions. delete delete delete

Images