JP2004251105A - Structure of underfloor part of double floor and its construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure imparting necessary rigidity and strength to a double floor when the double floor is constructed, and to improve its construction efficiency. <P>SOLUTION: The structure of an underfloor part of the double floor comprises a floor edge joist arranged on a periphery of a concrete slab floor occupied by an owner, a floor joist arranged inside the periphery of the concrete slab floor to place a floor underlaying material thereon. The necessary strength is imparted by connecting them at each of their adjacent parts to assemble them. Under the partition wall partitioning a habitable room, a shielding plate is mounted on the floor joist arranged by the intermediary of the floor underlaying material in a manner that the plate is erected along a longitudinal direction of the floor joist and from the concrete slab floor to the height which is within the height of the floor joist. When the floor underlaying material is laid under the bottom of the partition wall partitioning the habitable room, the floor underlaying material is cut or made to face the other floor underlaying material to have a gap so that vibrations of the habitable room may not be transmitted to the adjacent room via the floor underlaying material. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to a double-floor substructure of a reinforced concrete (including steel frame, steel-framed reinforced concrete) building, and a construction method thereof.

For buildings made of reinforced concrete (including steel frames and steel-framed reinforced concrete), support legs are placed on the concrete slab floor, and particle boards are placed on top of it, so that the floor is constructed as a double floor structure I do. In other words, when constructed in this way, floors with excellent sound insulation, which makes it difficult for daily sounds to be transmitted to the upper and lower floors, have a double floor with electrical wiring and piping for water supply and drainage. Is generally implemented. The double floor having such a structure may be constructed after erecting a partition wall that partitions a living room, or may be constructed by erecting a partition wall after laying a double floor. The present applicant discloses in Japanese Patent Application Laid-Open No. 2001-56222, a leather light receiving device and a construction or building member using the same as a means for efficiently constructing a floor joist to a reference height at a construction site on a concrete slab floor. The construction method is disclosed. In the floor leading method, Japanese Patent Application Laid-Open No. 2002-004550 discloses a double floor structure characterized by a wall supporting member that supports a partition wall. Japanese Patent Application Laid-Open No. 2002-235399 discloses such a double floor structure. A construction member used when constructing a heavy floor and a construction method using the same have been disclosed. Thereby, the sound insulation of the double floor is further improved, and a double floor with a uniform construction height can be provided. However, since this double floor is constructed with advanced technology, the construction cost increases. To improve this, it is necessary to improve the construction efficiency, reduce the cost, and further improve the rigidity of the floor. was there.
JP 2001-56222 A JP-A-2002-004550 JP-A-2002-235399

  When a double floor is constructed, the structure is such that the double floor has a desired rigidity and the construction efficiency of the construction is improved.

In order to achieve the above object, the double-floor subfloor structure is provided with a joist when disposed on an outer peripheral portion of a concrete slab floor occupied by an owner, and the concrete slab floor for placing a floor base material. And a floor joist disposed in the outer periphery of the floor joist; and a double-floor floor structure constructed with the above-mentioned joist and the floor joist, each of which is connected at an adjacent part to be assembled and assembled. In this way, they are self-supporting and have a predetermined strength. In addition, the floor joists are characterized in that they are constructed so as to correspond to the size or flexural strength of the floor base material and to make the intervals between the floor joists even. The edge joist and the floor joist are provided with a plurality of height adjusting means in a longitudinal direction thereof, and a nut fixed to a vertical through hole of the edge joist and the floor joist, and a bolt screwed into the nut It is characterized by having. The bolt is characterized in that an upper end thereof is provided with an engagement portion with which a driver is engaged, and a horizontal ring and / or an elastic base member provided at a lower end thereof. A shield plate is provided on the floor joist so as to be erected from the concrete slab floor within the height of the floor joist.
When the floor base material is laid at the bottom of the partition wall that partitions the living room, the floor base material is cut or opposed so that the vibration of the living room is not transmitted to the next room through the floor base material, and Is characterized by the following.

  The construction method of the double-floor underfloor structure is to arrange the joists when laid on the outer periphery of the concrete slab floor occupied by the owner and the inside of the outer perimeter of the concrete slab floor to place the floor base material. A floor joist to be installed, and a method of constructing a double floor to be constructed, wherein the edge joist and the floor joist are connected to each other at an adjacent part and assembled and constructed, and a floor base material is formed. It is characterized in that a partition wall for partitioning the living room after the installation is constructed. When constructing the floor joist, the method includes a level adjusting step of connecting and constructing the floor joist at the height of the edge joist.

  In the underfloor structure of the double floor according to the present invention, the joists to be constructed (edge joists and floor joists) are assembled by connecting adjacent portions, so that the joists become independent and fall down or the level is disturbed. This does not occur, and the rigidity of the floor is improved, so that problems such as irregularities in the fittings and floor noises do not occur. In addition, since the construction intervals of the floor joists are determined according to the floor base material and the construction is performed so that they are equal, there is no waste of the floor joists. Since the joist can be adjusted in height at the construction site, a uniform surface can be easily formed on the upper surface thereof. Since the elastic base member includes the elastic portion and the rigid portion, the elastic base member is firmly supported at a position where the floor base material supports a heavy object, and has a floor elasticity at a position where a person normally moves. The shielding plate attenuates the sound traveling under the floor. Further, in the case where the floor base material is cut or opposed to each other to form a gap, it becomes difficult for the vibration of the living room to be transmitted to the adjacent room.

  In the construction method of the double-floor underfloor structure, by connecting adjacent parts and assembling and constructing, the rigidity of the floor is improved, and the partition wall is installed under the floor joist. Since the construction is performed on the base material, the construction efficiency is improved, and the waste of the joist cut at the construction site is eliminated. In addition, the height of the floor joist on the side to be connected is easily determined by having a level adjustment step of connecting the height according to the height of the joist material (edge joist or floor joist) on the side to be connected. The construction efficiency can be improved.

  In order to provide the double floor with the desired rigidity, it was realized by connecting and connecting each of the edge joists and the floor joists at adjacent portions. Further, in order to improve the construction efficiency of the construction, the heights of the joist and the floor joist on the connecting side are adjusted according to the height of the joist or the floor joist on the connecting side.

  Embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1 or FIG. 5, the double-floor underfloor structure 1 of the present invention has a joist 2 a and a concrete joist when disposed on the outer peripheral portion of a concrete slab floor 8 partitioned by the owner. The floor joists 2b arranged in the outer peripheral portion of the slab floor 8 are connected and assembled. As shown in FIG. 5, the floor joists 2b are arranged at appropriate intervals on the concrete slab floor 8 according to the size of the particle board 6 (floor base material). In addition, the partition wall 5 that partitions the living room is erected so as to be placed in the longitudinal direction of the floor joist 2b via the particle board 6 (floor base material). That is, the floor joists 2b are arranged so as to correspond to the arrangement of the partition walls 5 and the size of the particle board 6, or to the bending strength of the particle board 6, and are connected to each other so as to obtain a desired floor rigidity. It is constructed.

  In order to improve the construction efficiency, the partition walls 5, 5a are placed on the particle board 6 and are erected after constructing a double floor. With this construction, the floor joist 2b can be constructed without being divided by the partition walls 5, 5a, and the labor and cutting time of the floor joist 2b at the construction site can be saved. The partition walls 5, 5a may be constructed in the longitudinal direction of the floor joists 2b, or may be constructed in the short direction of the floor joists 2b continuously arranged at predetermined intervals. In any case, The floor joists 2b have sufficient strength to support the partition walls 5, 5a.

  As shown in FIG. 2, the system joist 2 provided with a plurality of height adjusting means in the longitudinal direction of the prism-shaped joist 3 can be used for the edge joist 2a and the floor joist 2b. The system joist 2 is provided with a through hole 3g in the longitudinal direction of the joist material 3 as a height adjusting means, a nut 3a fixed in the through hole 3g, and a bolt 3b screwed to the nut 3a. The bolt 3b has an engaging portion 3e at the upper end and a horizontal ring 3c at the lower end. Thus, when the height of the system joist 2 is adjusted while the system joist 2 is placed on the concrete slab floor 8, the driver or the like is engaged with the engaging portion 3 e of the bolt 3 b and is rotated, whereby the system joist is rotated. Raise or lower 2 Further, when the elastic member cap 3d (elastic base member) is attached to the horizontal ring 3c, the system joist 2 has a cushioning property that slightly sinks against a load. That is, in a living room, the floor has a soft cushioning property at a place where a person walks.

  FIGS. 3A and 3B show connecting members 7 used when connecting the adjacent system joists 2, respectively, and show a mounting portion 9 having a horizontal plane and a vertical portion. The vertical portion 10 is provided. These connecting members 7 are provided with a plurality of through holes 7a. After fixing one system joist 2 with a nail or the like, the other system joist 2 is mounted on the mounting portion 9 to form a right angle. Or it can be fixed in series. Similarly, an adhesive may be applied to the mounting portion 9 (or a double-sided adhesive tape may be applied), and the two system joists 2 may be bonded and fixed. That is, (a) of FIG. 3 is used when the system joists 2 are connected at right angles at the corners as shown in (a) of FIG. 4, and (b) of FIG. As shown in FIG. 4 (b), this is used when the system joists 2 are connected in series. Such a connecting member 7 is used when connecting the system joist 2 whose horizontal level has already been determined and the adjacent system joist 2. However, the present invention is not limited to this, and may be implemented as appropriate, such as connecting the end of the other system joist 2 to the intermediate portion of one system joist 2.

FIG. 3C shows the receiving bracket 11 formed so that the bolt 11b is screwed into the threaded through hole 11a. As shown in FIG. 4C, the receiving metal fitting 11 is used by being applied to the bottom of the system joist 2, and is used as a temporary support for the system joist 2, or is used during construction. It is used for reinforcement.
The connecting member 7 and the receiving member 11 do not need to be made of metal having the through-hole 7a or the through-hole 11a. For example, a pair of system joists 2 may be made of a wooden plate material such as an adhesive, a nail, a screw, or the like. It may be fixed with. Further, the means for connecting the connecting portions of the pair of system joists 2 is not necessarily limited to using the connecting member 7. For example, using the particle board 6, the means for connecting the pair of system joists 2 is used. The system joists 2 may be connected by driving a nail or the like into the connecting portion of the system.

  In the double-floor underfloor structure 1 configured as described above, the system joists 2 are arranged on the concrete slab floor 8 together with the electric wiring and the plumbing pipes. It may not be linked. Further, when the system joists 2 are arranged so as to have a sufficient strength, some portions are not necessarily connected. However, when arranging the system joists 2, by connecting the adjacent system joists 2, it is easy to construct the system joists 2 with a uniform horizontal level, thereby improving the construction efficiency and improving the floor rigidity. I do. Therefore, it is preferable to connect the system joists 2 as much as possible and to construct the floor efficiently.

FIG. 6 shows that a partition wall 5 for partitioning a living room is supported on a floor joist 2b (system joist) via a particle board 6 (floor base material), and a shielding plate 15 is provided along a longitudinal direction of the floor joist 2b. It is shown that it is done. The shielding plate 15 is provided upright from the concrete slab floor 8 to the floor joist 2b. By providing the shielding plate 15 in this manner, the space between the particle board 6 and the concrete slab floor 8 is divided in units of living room, and the sound generated in one living room is hardly transmitted to another living room. The shielding plate 15 is not necessarily provided at the bottom of the partition wall 5 that partitions the living room, and is not required to be provided along the longitudinal direction of the floor joist 2b, but at any position of the floor joist 2b disposed in the living room area. May be provided to make sound more difficult to propagate.
As the double-floor underfloor structure 1 that makes it difficult for sound to propagate, a configuration in which a slight gap 14 is provided by disposing the particle boards 6 at the bottom of the partition wall 5 so as to face each other may be employed. By providing the gap 14, the vibration of the living room transmitted through the particle board 6 is not transmitted to the adjacent room.

  The construction method implemented in the double-floor underfloor structure 1 of the present invention (see FIG. 5) can greatly improve the construction efficiency as compared with other construction methods. In the construction procedure, the height of the joist 2a is first adjusted on the outer periphery of the concrete slab floor 8 so as to have a predetermined height, and the adjacent portions of the adjacent joist 2a are connected and executed. When the joist 2a thus constructed is fixed in height, the bottoms of the partition walls 5, 5a for sequentially dividing the living room and the particle board 6 (floor base material) are sequentially fitted to the height. The floor joists 2b are arranged adjacent to the bottom of the particle board 6 in accordance with the size of (2), and the adjacent portions of the adjacent floor joists 2b are connected (at a level adjustment stage).

  In another construction procedure, the level adjusting step for adjusting the floor joist 2b to the height level of the edge joist 2a uses a tension thread (not shown) provided by being stretched at a predetermined level. This is performed by bringing the upper surface of the floor joist 2b into contact with the tension yarn. In this case, the tension yarn is provided such that one is connected to the joist 2a and the other is hung over the other joist 2a or a level indicating pillar (not shown). Further, the level indicating pillar is set up vertically from the concrete slab floor 8 to the ceiling, and the construction height of the floor joist 2b is marked by a laser beam or the like.

  In FIG. 7, a long ruler 20 (long ruler) or the like is laid in place of the tension thread, and the upper surface of the floor joist 2 b is brought into contact with the bottom surface of the long ruler 20 (Y-Y in the figure). The gap between them is closed), and the construction height is determined. In this case, the construction heights of the left and right floor joists 2b (or the edge joists 2a) are determined by the above-described laser beam or the like. When the long ruler 20 is used as described above, the floor joist 2b whose construction height is not determined can be easily constructed between the floor joists 2b whose construction height is determined.

Table 1 shows implementation data on construction efficiency, which was implemented in a condominium with an exclusive area of 77, ² m ² , a double floor area of 68, and ¹ m ² .
In Table 1, 1, wall precedence method, when the partition wall 5 that partitions the living room is erected on the divided concrete slab floor, after the partition wall 5 is erected first, double floor construction (joist construction) And floor construction), and the floor pre-construction method (reinforcement under the wall) is to perform double floor construction (joist construction and floor construction) first, but reinforcing members such as support legs are provided under the wall. The floor pre-construction method (the present application) is a construction method based on the above-described construction procedure of the present invention.

  As shown in Table 1 above, the number of days required for construction is reduced by 60% (from 3.7 days to 1.5 days) as compared with the conventional construction method using conventional joists, 29% (2.1 to 1.5 days) of construction days could be reduced compared to the case of lower reinforcement. In the third, floor pre-construction method (the present application), since the same person performed the joist construction and the floor construction, it was difficult to classify them, and for convenience, the distribution was made at the same rate.

  As shown in Table 1 above, the reason why the construction efficiency is improved is that the level of the joist can be quickly obtained. That is, system joists (floor joists or edge joists) are long, and by connecting each system joist, it is integrated with the next system joist, whereby the next system joist is adjusted by the bolt, It depends on the height level. Also, by connecting the system joists in series, the connected system joists become long, but by adjusting the height at the left and right ends of the long system joists, It is because the adjustment of is easy. In other words, since there is no partition wall because of the floor leading method, the movement of the operator is easy and quick, but there is no need to cut the floor plate, The construction efficiency is improved because of the following reasons: the level can be adjusted, and the level can be adjusted with a long rule because there is no obstacle to the wall.

It is explanatory drawing for demonstrating the under-floor structure of a double floor. It is a perspective view of a system joist provided with a plurality of height adjusting means. (A), (b), (c) is a perspective view of a connecting member, respectively. (A), (b), (c) is an explanatory view each explaining the connection of the system joist using the connection member of FIG. 3, respectively. It is explanatory drawing explaining that a partition wall is constructed on a double floor. It is explanatory drawing explaining the lower structure of a partition wall. It is explanatory drawing explaining the level adjustment of a floor joist using a long rule.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Subfloor structure of a double floor 2 System joist 2a Edge joist 2b Floor joist 3 Jut 3a Nut 3b Bolt 5 Partition wall 6 Particle board (floor base material)
7 connecting member 8 concrete slab floor 14 gap 15 shielding plate 20 long rule

Claims (8)

  When installed on the outer peripheral portion of the concrete slab floor occupied by the owner, it is constructed with a joist, and a floor joist disposed inside the outer periphery of the concrete slab floor for placing flooring material. A double-floor floor structure, wherein the joist and the floor joist are self-supported by connecting and assembling them at adjacent portions adjacent to each other, and are provided with a predetermined strength. Underfloor structure of heavy floor.   2. The double floor joist according to claim 1, wherein the floor joists are constructed so as to correspond to the size or flexural strength of the floor base material so that the working intervals of the respective floor joists are equal. Floor substructure.   The edge joist and the floor joist are provided with a plurality of height adjusting means in a longitudinal direction thereof, and a nut fixed to a vertical through hole of the edge joist and the floor joist, and a bolt screwed into the nut The double-floor underfloor structure according to claim 1 or 2, further comprising:   The bolt according to any one of claims 1 to 3, wherein the bolt includes an engaging portion at the upper end of which the driver engages, and a horizontal ring and / or an elastic base member provided at the lower end. Subfloor structure with double floor.   The underfloor of a double floor according to any one of claims 1 to 4, wherein a shield plate is provided on the floor joist so as to be erected from the concrete slab floor within the height of the floor joist. Part structure.   When the floor base material is laid at the bottom of the partition wall that partitions the room, the floor base material is cut or opposed so that vibration of the living room is not transmitted to the next room via the floor base material, and The double-floor underfloor structure according to any one of claims 1 to 5, characterized in that:   When installed on the outer peripheral portion of the concrete slab floor occupied by the owner, it is constructed with a joist, and a floor joist disposed inside the outer periphery of the concrete slab floor for placing flooring material. A method of constructing a double floor, wherein the joist and the floor joist are connected and assembled at an adjacent part adjacent to each other, and a partition wall for separating a living room after arranging a floor covering material is constructed. A method of constructing a double-floor substructure below.   The lower floor of a double floor according to claim 7, further comprising a level adjustment step of connecting the floor joists at the height of the edge joists when constructing the floor joists. Construction method of the structure.

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