JP4881024B2 - Anti-vibration floor structure - Google Patents

Description

  The present invention relates to a vibration-proof floor structure.

Recently, particularly in apartment buildings such as condominiums, the sound of children jumping, dragging chairs, and sound generated from audio equipment and instruments impacts the floor and is radiated to downstairs rooms, causing noise and vibration. It is the cause of the problem.
Therefore, a technique for reducing the above-described floor impact sound by improving the floor structure is known. For example, a floating floor type anti-vibration floor structure is known in which a shock-absorbing rubber, glass wool, or other cushioning material is interposed between the concrete slab and the floor finishing material to absorb the floor impact sound. (See Patent Document 1).
JP-A 64-10868 (FIG. 4)

Here, the above-described floating floor type vibration-proof floor structure generally lays cushioning material, floor finishing material, etc. on the concrete slab, so that the height from the top surface of the concrete slab to the top surface of the floor finishing material is high. The length is about 65 to 80 mm. On the other hand, a so-called direct floor structure that does not lay cushioning material on the concrete slab is generally laid on the concrete slab directly from the upper surface of the concrete slab, so the floor finish material is laid directly on the concrete slab. The height up to the top surface is about 20-30 mm.
Therefore, in the same floor, when there is a floor adopting a floating floor type anti-vibration structure and a floor adopting a direct floor structure, a level difference of at least 35 mm is generated in the height of both floor surfaces. Such a step not only interferes with daily life, but can also be a barrier-free obstacle.
From this point of view, the present invention provides a vibration-isolating floor structure that does not cause a step even when there is a floor adopting a floating floor type vibration-proof floor structure and a floor adopting a direct floor structure on the same floor. It is an issue to provide.

Such invention object is a devised to solve the protruding, and the concrete slab, and a recess provided on the upper surface of the concrete slab, and a buffer material provided in the recess, downwardly from the lower surface of the concrete slab And the upper surface of the cushioning material has the same height as the upper surface of the concrete slab, and the lower surface of the end portion of the concrete slab is disposed on a wall or a column. The protruding portion protrudes below a portion where the lower surface of the end portion and the wall or the column contact each other.

  According to this invention, since the cushioning material is laid in the concave portion provided on the top surface of the concrete slab, the top surface height of the cushioning material and the height of the top surface of the concrete slab can be made substantially equal. In this case, it is possible to construct a vibration-proof floor structure in which no step is generated.

The concrete slab is preferably made of precast concrete, and an end portion of the concrete slab is preferably provided with a hole through which a rising line provided in the wall or column is inserted .

According to this invention, even if it provides a recessed part in concrete slab, the required thickness of concrete slab is securable by making the lower surface of concrete slab protrude. Moreover, even if the necessary thickness of the concrete slab is secured in this way, the floor height does not change. That is, if the thickness of the concrete slab, which is reduced by providing the recesses, is secured by increasing the thickness of the entire concrete slab, the floor height rises accordingly, and the floor height changes. Therefore, in order to make the height of the floor the same, it must be adjusted by shortening the walls, pillars and the like.
However, as in the present invention, the thickness of the concrete slab, which is reduced by providing the recesses, is secured by projecting to the lower surface of the concrete slab, so that the walls and pillars manufactured according to the normal floor height can be used as they are. can do.

  The concrete slab is preferably protruded downward so that the depth of the recess and the thickness of the protrusion are substantially equal.

Here, the depth of a recessed part means the length (height) from the upper surface of a concrete slab to the bottom face of a recessed part. Moreover, the thickness of a protrusion part means the perpendicular | vertical length from the lower surface of the edge part of a concrete slab to the lower surface of a protrusion part.
According to this invention, by making the thickness of the protrusion and the depth of the recess substantially the same, the minimum necessary thickness of the concrete slab can be secured, so that the economy and workability can be improved. it can.

  The concrete slab is provided with bending bars, and the bending bars are disposed at the end portion of the concrete slab and below the height position of the tip portion. It is desirable to include a central portion that is positioned and arranged below the concave portion, and an inclined portion that connects the tip portion and the central portion.

  According to this invention, since a reinforcing bar is arranged below the edge part and recessed part of a concrete slab, the required intensity | strength of a concrete slab can be obtained.

  According to the vibration-isolating floor structure according to the present invention, the height of the upper surface of the reinforced concrete slab and the height of the upper surface of the cushioning material can be made substantially equal. can do.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the description, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a perspective view showing an anti-vibration floor structure 1 according to the present embodiment. FIG. 2 is a perspective view showing the reinforced concrete slab 2 and the buffer material 3. 3 is a cross-sectional view in the direction of arrows AA in FIG. 4A and 4B are perspective views showing a construction example of the vibration-proof floor structure 1 according to the present embodiment, in which FIG. 4A is a diagram before construction and FIG. 4B is a diagram after construction. FIG. 5 is a cross-sectional view taken along the line BB in FIG. (In the description below, the vertical and horizontal directions follow the arrows in FIG. 1)

  As shown in FIGS. 1 and 2, the anti-vibration floor structure 1 according to the present embodiment includes a reinforced concrete slab 2 and a cushioning material 3 laid in a recess 4 provided substantially at the center of the reinforced concrete slab 2. In addition, the concrete slab which concerns on this invention uses the reinforced concrete slab 2 which arranged the reinforcing bar in this embodiment. Each configuration will be described in detail below.

As shown in FIGS. 2 and 3, the reinforced concrete slab 2 is a precast rectangular reinforced concrete plate in plan view. The reinforced concrete slab 2 has a recess 4 at the approximate center of the upper surface of the reinforced concrete slab 2 and protrudes downward at the approximate center of the lower surface. It has the protrusion part 7 which does. Joints F and F are provided at the left end of the reinforced concrete slab 2 in order to join with the other reinforced concrete slab 2. At the four corners of the reinforced concrete slab 2, holes H to be inserted into the rising bars G described later are formed. The reinforced concrete slab 2 in the present embodiment has, for example, a length of 4.6 m and a width of 4.0 m, and the end thickness r is 15 cm (see FIG. 3).
In the present embodiment, the reinforced concrete slab 2 has the above-described shape and size, but is not limited to this, and may have a circular shape in a plan view or a polygonal shape.

  In this embodiment, the recess 4 has, for example, a rectangular shape in plan view, and has a depth of p5 cm, a length of 4.2 m, and a width of 3.6 m (see FIG. 3). A buffer material 3 to be described later is laid in the recess 4.

The protrusion part 7 means the part protruded below from the lower surface 6 of the reinforced concrete slab 2 as shown in FIG. As shown in FIG. 3, the cross-sectional shape of the protruding portion 7 is a trapezoidal shape that becomes narrower as the distance from the reinforced concrete slab 2 increases. The thickness s of the protrusion 7 is 5 cm in the present embodiment, and is equal to the depth p of the recess 4.
Here, the protrusion part 7 is for ensuring the required thickness of the reinforced concrete slab 2 reduced by shape | molding the recessed part 4. As shown in FIG. Therefore, the protrusion 7 is formed immediately below the recess 4, and the shape of the protrusion 7 in plan view is formed to be larger than the shape of the recess 4 in plan view.

  In the present embodiment, the concave portion 4 and the protruding portion 7 having a rectangular shape in plan view are provided in the approximate center of the reinforced concrete slab 2. What is necessary is just to determine the magnitude | size of the part 7, a position, a shape, etc. The shapes of the recesses 4 and the protrusions 7 are substantially rectangular in plan view, but may be circular or polygonal in plan view, and the shapes of the recesses 4 and the protrusions 7 in plan view may be different.

  Moreover, in this embodiment, although the cross-sectional shape of the protrusion part 7 was made into the trapezoid shape which became so narrow that it left | separated from the reinforced concrete slab 2, it is not the meaning limited to this shape and is perpendicular | vertical from the lower surface of the reinforced concrete slab 2. You may make it protrude. Moreover, the recessed part 4 may be shape | molded in mortar shape and frustum shape, and the protrusion part 7 may be made to protrude in cross-sectional arc shape.

Next, a bar arrangement method for the reinforced concrete slab 2 will be described.
In the present embodiment, the reinforced concrete slab 2 is reinforced in order to prevent the bending bars 20 and 20 in the lateral direction, the linear auxiliary bars 21 and the bending bars 20 in the vertical direction from being lifted, as shown in FIG. The muscle 22 is arranged. The bending bars 20, 20 are composed of a tip 20x, an inclined part 20y, and a center 20z, and are arranged so that the upper side (upper bar) and the lower side (lower bar) of the reinforced concrete slab 2 are parallel to each other. . In the present embodiment, the bending muscles 20 are arranged at substantially equal intervals in the vertical direction for both the upper and lower muscles.

  As shown in FIG. 3, the front end portion 20 x refers to a portion that is arranged at the end portion of the reinforced concrete slab 2. The central portion 20z is a portion that is located below the height position of the distal end portion 20x and is arranged below the concave portion 4. The inclined portion 20y refers to a portion that is obliquely arranged to connect the tip portion 20x and the central portion 20z.

In the present embodiment, the reinforcing bars T are arranged as described above, but the present invention is not limited to this. For example, the bending reinforcing bars 20 may be arranged in the transverse direction and the longitudinal direction of the reinforced concrete slab 2. The number of the bent bars 20 is not limited. The reinforcement may be appropriately arranged in consideration of the size, shape, etc. of the anti-vibration floor structure 1.
In this embodiment, all the reinforcing bars T have a diameter D10.

Next, the shaping | molding method of the reinforced concrete slab 2 in this embodiment is demonstrated.
The reinforced concrete slab 2 in this embodiment has a precast reinforced concrete structure.
First, after forming the formwork of the reinforced concrete slab 2 using a plywood, the reinforcing bar T is arranged. The recess 4 is formed by boxing. Next, after placing and curing concrete, the reinforced concrete slab 2 is completed.

In addition, in this embodiment, what is necessary is just to use well-known cements, such as Portland cement and early strong Portland cement, for concrete. In addition, in this embodiment, the recess 4 is formed by unboxing. However, the present invention is not limited to this, and after the upper surface of the reinforced concrete slab is formed flat, the surface is cut to form the recess 4. May be.
In this embodiment, the reinforced concrete slab 2 is precast reinforced concrete in consideration of convenience and workability. However, the present invention is not limited to this, and it may be on-site.

Next, the buffer material 3 will be described.
In the present embodiment, the cushioning material 3 is composed of glass wool 3a and fiber-mixed gypsum plates 3b and 3c, as shown in FIG. The glass wool 3a has a density of about 96 kg / m ³ and a thickness of about 26 mm, and is laid uniformly in the recess 4. In order to flatten the surface, fiber-mixed gypsum plates 3b and 3c having a thickness of about 12 mm are laid on the glass wool 3a. Since the depth p of the recess 4 and the thickness q (see FIG. 2) of the buffer material 3 are both 50 mm, the height of the upper surface of the reinforced concrete slab 2 and the height of the buffer material 3 are substantially equal.

  In this embodiment, the glass wool 3a and the fiber-mixed gypsum plates 3b and 3c are used as the buffer material 3, but the present invention is not limited to this, and other materials may be used. For example, in addition to glass wool 3a, rock wool, polyethylene foam, polystyrene foam, rubber chips, wood chips, and the like may be used. Moreover, you may use a calcium-silicate board, a veneer board, etc. as a thing which makes the surface flat.

Next, the construction method of the vibration-proof floor structure 1 in this embodiment is demonstrated.
FIG. 4 is a diagram showing a construction method of the vibration-proof floor structure 1 in the present embodiment, where (a) shows before construction and (b) shows after construction. FIG. 5 is a cross-sectional view taken along the line BB in FIG.

As shown in FIG. 4A, rising bars G, G,... Are embedded on the upper surfaces of the reinforced concrete walls K, K,. On the upper surfaces of the walls K, K, K, a flat reinforced concrete slab 10 is installed.
Here, using a lifting means such as a crane (not shown), the vibration-proof floor structure 1 is lifted, the corresponding rising muscle G is inserted into the hole H formed in the vibration-proof floor structure 1, and the wall The anti-vibration floor structure 1 is installed on the upper surface of K. And both are couple | bonded by the coupling F provided in the flat reinforced concrete slab 10 and the vibration-isolation floor structure 1. FIG.
In addition, in this embodiment, although the above-mentioned construction method and construction order were employ | adopted, it is not limited to this.

According to the vibration-isolating floor structure 1 of the present embodiment, the thickness of the concave portion 4 of the reinforced concrete slab 2 and the thickness of the buffer material 3 are substantially equal, and therefore the height of the upper surface of the reinforced concrete slab 2 and the upper surface of the buffer material 3 Are substantially the same height. Thereby, as shown in FIG. 5, even if the flat reinforced concrete slab 10 and the anti-vibration floor structure 1 used in the direct floor structure are adopted on the same floor, there is no step in the height of the floor surface.
Further, the anti-vibration floor structure 1 is provided with a vibration-proof function only on a part of the same floor surface by providing the recess 4 on the upper surface of the reinforced concrete slab 2, and there is a step between the upper surface of the reinforced concrete slab 2 and the upper surface of the cushioning material 3. Therefore, it is possible to construct the vibration-isolating floor structure 1 in which no occurrence occurs. Therefore, for example, when the cushioning material 3 is laid only on the portion where the grand piano is placed, the anti-vibration floor structure 1 according to the use and economy of the building can be easily constructed.

Moreover, as shown in FIG. 3, since the protrusion part 7 is provided under the reinforced concrete slab 2, the required thickness of the reinforced concrete slab 2 reduced by forming the recessed part 4 can be ensured.
In addition, by providing the projecting portion 7 on the lower surface of the reinforced concrete slab 2, the floor height does not change even if the necessary thickness is ensured. It can be used as it is.

  Further, as shown in FIG. 3, by making the thickness of the concave portion 4 and the thickness of the protruding portion 7 substantially equal, it is possible to construct the vibration-proof floor structure 1 that is economically and structurally useless. .

  Moreover, since the reinforcing bar T is arranged below the end part of the reinforced concrete slab 2 and the recessed part 4 by using the bending bar 20 which consists of the front-end | tip part 20x, the inclination part 20y, and the center part 20z, it is the vibration-isolating floor. The structure 1 can obtain the required strength.

As mentioned above, although embodiment concerning this invention was described in detail with reference to drawings, this invention is not limited to this, In the range which does not deviate from the meaning of this invention, it can change suitably.

<Second embodiment>
For example, the anti-vibration floor structure according to the present invention may configure the same floor using a plurality of panels. FIG. 6 is a perspective view showing the second embodiment, where (a) shows before construction and (b) shows after construction. FIG. 7 is a cross-sectional view taken along the line CC in FIG.

  As shown to (a) and (b) of FIG. 6, the reinforced concrete slab 2 'is comprised from the panel 11a, the panel 11b, and the panel 11c which consist of reinforced concrete. The upper surfaces of the panels 11a and 11c are provided with recesses 4 'and 4' that are open upward, and one end surface of the recess 4 'is open to one side. Further, a concave portion 4 ′ opened upward is provided on the upper surface of the panel 11 b, and both end surfaces of the concave portion 4 ′ are open on both sides. Joints F, F... For joining the panels 11a, 11b, 11c are provided at the ends of the panels 11a, 11b, 11c. A flat reinforced concrete slab 10 is installed on the upper right side of the walls K, K, K, K surrounded by the four sides.

  Since panel 11a, 11b, 11c is substantially equal to the shape which divided the reinforced concrete slab 2 (refer FIG. 1) into 3 equal to the vertical direction, detailed description is abbreviate | omitted.

  As shown in FIG.6 and FIG.7, the construction method of 2nd embodiment inserts the panel 11a, 11b, 11c into the standing muscle G which is not shown in figure, and after installing in the wall K, joint reinforcement J, J ... Join. Next, the mortar M is filled in the joint groove N and is left until cured. Then, the shock-absorbing floor structure 11 is completed by laying the cushioning material 3 in the recess 4.

  In the second embodiment, the cushioning material 3 is laid after the mortar M is filled in the joint groove N. However, the construction method and the construction order are not limited, and for example, after the joint bar J is joined. The buffer material 3 may be laid, and the mortar M may be filled from an inlet (not shown) provided in advance. In addition, for example, when laying the buffer material 3, a part of the buffer material 3 is cut out, a portion corresponding to the joint F is opened, and the mortar M is filled and cured, and then formed into the shape of the joint F. You may construct so that it may cover with the buffer material 3 which was done. In addition, what is necessary is just to construct the joint F using a well-known technique.

As described above, according to the second embodiment, even if a plurality of panels 11a, 11b, and 11c are combined, the vibration-proofing in which the height of the upper surface of the reinforced concrete slab 2 ′ and the upper surface of the cushioning material 3 are substantially equal. The floor structure 11 can be constructed.
In the present embodiment, three panels are used, but this is not intended to limit the number of panels.

In the description of the embodiment, the construction method for installing the anti-vibration floor structures 1 and 11 on the upper surface of the wall K has been described. However, the present invention is not limited to this. You may install on a foundation etc. (not shown).
Further, in the description of the embodiment, the anti-vibration floor structure 1 is fixed by penetrating the rising muscle G and the hole H of the anti-vibration floor structure 1, but the present invention is not limited thereto. The surface to which K and the anti-vibration floor structures 1 and 11 are joined may be provided with unevenness, or the anti-vibration floor structures 1 and 11 may be simply placed on the wall K.

  In the description of the embodiment, the reinforced concrete slab 2 is precast reinforced concrete. However, the present invention is not limited to this, and the reinforced concrete slab 2 may be constructed on site.

  In the description of the embodiment, the reinforcing bars T arranged in the reinforced concrete slab 2 have the above-described number and diameter (see FIG. 3 and the like), but the present invention is not limited to this. That is, depending on the stress state of the reinforced concrete slab 2, the number of reinforcing bars T may be increased or decreased, and reinforcing bars T having other diameters may be used.

It is the perspective view which showed the vibration-proof floor structure which concerns on this embodiment. It is the perspective view which showed each structure of the vibration-proof floor structure which concerns on this embodiment. It is AA sectional drawing of FIG. It is the perspective view which showed the construction example of the vibration-proof floor structure which concerns on this embodiment, Comprising: (a) shows before construction, (b) shows after construction. It is BB sectional drawing of (b) of FIG. It is the perspective view which showed 2nd embodiment, Comprising: (a) is before construction, (b) shows after construction. It is CC sectional drawing of (b) of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Anti-vibration floor structure 2,2 'reinforced concrete slab 3 Cushioning material 4,4' recessed part 6 Lower surface of edge part 7 Protrusion part 10 Flat reinforced concrete slab 11 Anti-vibration floor structure 20 Folding reinforcement 20x Tip part 20y Inclined part 20z Center part p Depth of recess s Thickness of protrusion T Rebar

Claims (4)

Concrete slab ,
A recess provided on the upper surface of the concrete slab ;
A cushioning material provided in the recess ;
A projecting portion projecting downward from the lower surface of the concrete slab,
The upper surface of the cushioning material is the same height as the upper surface of the concrete slab,
The lower surface of the end of the concrete slab is disposed on a wall or column,
The anti-vibration floor structure characterized in that the protruding portion protrudes downward from a portion where the lower surface of the end portion and the wall or the column contact . The concrete slab is made of precast concrete,
The anti-vibration floor structure according to claim 1 , wherein a hole through which a rising line provided in the wall or column is inserted is provided at an end of the concrete slab. The concrete slab is
The anti-vibration floor structure according to claim 1 or 2, wherein the depth of the concave portion is substantially equal to the thickness of the protruding portion. The concrete slab is provided with bending bars,
This bend is
A tip portion arranged at an end portion of the concrete slab;
A central portion located below the height of the tip, and arranged below the recess;
The anti-vibration floor structure according to any one of claims 1 to 3 , further comprising an inclined portion connecting the tip portion and the central portion.

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