JP7239096B2 - Floor construction method - Google Patents

Description

The present invention relates to a floor construction method.

Wood floor slabs whose upper surfaces are coated with fireproofing by precast concrete plates, finishes, or the like are known (see, for example, Patent Documents 1 and 2).

JP 2017-078307 A JP 2017-025524 A

By the way, it is conceivable that a self-leveling material, concrete, or the like is poured over the upper surfaces of a plurality of wooden floor slabs at the site, and the upper surfaces of the wooden floor slabs are coated with the self-leveling material, concrete, or the like for fireproofing.

However, in the above case, it is necessary to temporarily install and remove the formwork, so there is a possibility that the construction will take time and effort.

SUMMARY OF THE INVENTION In view of the above facts, an object of the present invention is to improve workability when fireproof coating is applied to the upper surfaces of a plurality of wooden floor slabs on site.

In the floor construction method according to claim 1, a floor member having a wooden floor slab and a first fireproof coating material covering the upper surface of the wooden floor slab, leaving at least the ends thereof, is arranged so that the ends are adjacent to each other. a floor member installation step of installing a plurality of floor members, a second fireproof covering material is poured between the adjacent first fireproof covering materials, and the upper surfaces of the adjacent ends are fireproofly covered with the second fireproof covering material and

According to the floor construction method of claim 1, the floor member installation step and the fireproof coating step are provided. In the floor member installation step, a plurality of floor members each having a wooden floor slab and a first fireproof coating material covering the upper surface of the wooden floor slab except at least the ends are installed with the ends thereof adjacent to each other.

In the fire-resistant coating step, the second fire-resistant coating material is poured between the adjacent first fire-resistant coating materials, and the upper surfaces of the adjacent end portions are fire-resistant-coated with the second fire-resistant coating material. At this time, the first fireproof covering material functions as a formwork for the second fireproof covering material. Therefore, temporary installation and removal work of the formwork can be reduced. Therefore, workability is improved.

In the floor construction method according to claim 2, in the floor construction method according to claim 1, in the fireproof coating step, after the upper surfaces of the adjacent ends are joined with a joining member, the upper surfaces are joined to the second Cover with fireproof coating material.

According to the floor construction method according to claim 2, in the fireproof coating step, after joining the upper surfaces of the ends of the adjacent wooden floor slabs with the joining member, the second fireproof coating material is poured over the upper surfaces of these wood floor slabs to provide the fireproof coating. do. As a result, the upper surfaces of the ends of the adjacent wooden floor slabs and the joining members are fireproof coated with the second fireproof coating material. Therefore, the fireproof performance of the floor member is improved.

The floor construction method according to claim 3 is the floor construction method according to claim 1 or claim 2, wherein the wooden floor slab is engaged with the first fireproof covering material in the in-plane direction of the wooden floor slab. A mating detent is provided.

According to the floor construction method of claim 3, the wooden floor slab is provided with the anti-slip portion. The anti-slip portion engages with the first fireproof covering material in the in-plane direction of the wooden floor slab. This suppresses displacement of the first fireproof covering material with respect to the wooden floor slab.

The floor construction method according to claim 4 is the floor construction method according to any one of claims 1 to 3, wherein the first fireproof covering material and the second fireproof covering material are self-leveling materials. be.

According to the floor construction method of claim 4, the first fireproof covering material and the second fireproof covering material are self-leveling materials.

Here, the self-leveling material has high fluidity. Therefore, a smooth surface can be easily formed by pouring the self-leveling materials as the first fireproof covering material and the second fireproof covering material on the upper surface of the wooden floor slab. Therefore, the workability of the first fireproof covering material and the second fireproof covering material is improved.

As described above, according to the floor construction method according to the present invention, it is possible to improve workability when the upper surfaces of a plurality of wooden floor slabs are covered with a fireproof coating on site.

1 is a plan view showing a floor constructed by a floor construction method according to an embodiment; FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1; FIG. FIG. 3 is a cross-sectional view corresponding to FIG. 2 showing a state before the ends of adjacent wooden floor slabs are joined together via a joining plate; It is the perspective view which looked at the floor member shown by FIG. 3 from the diagonal upper side. FIG. 5 is a vertical cross-sectional view showing a floor member to which a modified example of the floor construction method according to one embodiment is applied; FIG. 5 is a vertical cross-sectional view showing a floor member to which a modified example of the floor construction method according to one embodiment is applied; FIG. 5 is a vertical cross-sectional view showing a floor member to which a modified example of the floor construction method according to one embodiment is applied;

Hereinafter, a floor construction method according to one embodiment will be described with reference to the drawings.

FIG. 1 shows a floor 10 constructed by the floor construction method according to this embodiment. The floor 10 is constructed over a pair of beams 12 . A pair of beams 12 are arranged facing each other in a predetermined direction. The pair of beams 12 are made of wood, steel, reinforced concrete, or steel reinforced concrete.

The floor 10 includes a plurality of floor members 20, a joint plate 40 that joins the ends of the adjacent floor members 20, and a second cement system that coats the ends of the adjacent floor members 20 and the joint plate 40 with a fireproof coating. and a refractory coating 60 .

The first cementitious fireproof coating material 50 is an example of the first fireproof coating material, and the second cementitious fireproof coating material 60 is an example of the second fireproof coating material.

The floor member 20 has a wooden floor slab 22 and a first cementitious fireproof covering material 50 . The wooden floor slab 22 is made of, for example, CLT (Cross Laminated Timber), LVL (Laminated Veneer Lumber), laminated wood, plywood, solid wood, or other wooden surface materials.

Further, the wooden floor slab 22 is formed in a rectangular shape in plan view. This wooden floor slab 22 is laid over the pair of beams 12 . More specifically, the wooden floor slab 22 is arranged with its longitudinal direction facing the pair of beams 12 , and both ends in the longitudinal direction are joined while being placed on the pair of beams 12 . ing.

A plurality of wooden floor slabs 22 are arranged adjacent to each other in the width direction. In other words, the wooden floor slabs 22 are arranged side by side in the longitudinal direction of the pair of beams 12 . The ends 22E of the adjacent wooden floor slabs 22 are spline-joined via a joint plate 40. As shown in FIG.

Specifically, as shown in FIGS. 2 and 3, grooves 30 are formed in upper surfaces 22U1 of ends (joint ends) 22E of adjacent wooden floor slabs 22. As shown in FIG. The groove portion 30 is formed over the end portions 22E of the wooden floor slabs 22 adjacent to each other. Further, the groove portion 30 is formed to have a U-shaped cross section (C-shaped cross section) that opens the upper surface 22U1 of the wooden floor slab 22 . The groove portion 30 has a bottom surface 30L and a pair of inner side surfaces 30S. Further, the groove portion 30 extends from one end side to the other end side of the end portion 22E of the wooden floor slab 22 .

The groove portion 30 is formed by combining cutout portions 32 formed at the end portions 22E of the adjacent wooden floor slabs 22. As shown in FIG. As shown in FIG. 4, the notch 32 is formed along the edge 22E of each wooden floor slab 22. As shown in FIG. The notch 32 is formed in an L-shaped cross section that opens the upper surface 22U1 and the end surface 22T of the wooden floor slab 22. As shown in FIG.

As shown in FIG. 2 , a joining plate 40 is fitted in the groove portion 30 . As with the wooden floor slabs 22, the joint plate 40 is made of a wooden surface material such as CLT, LVL, laminated lumber, plywood, or solid wood. Also, the joining plate 40 is formed in a rectangular shape along the groove portion 30 . The width of the joining plate 40 is substantially the same as the groove width of the groove portion 30 . Thereby, the joining plate 40 is fitted in the groove portion 30 .

The thickness of the joining plate 40 is substantially the same as the depth of the groove portion 30 . As a result, when the joint plate 40 is fitted in the groove 30, the upper surface 40U of the joint plate 40 and the upper surface 22U1 of the wooden floor slab 22 are substantially flush with each other. The joint plates 40 are fixed to the ends 22E of the adjacent wooden floor slabs 22 with screws 42, respectively. A plurality of screws 42 are provided at intervals in the longitudinal direction of the joining plate 40 . Through this joint plate 40, the end portions 22E of the adjacent wooden floor slabs 22 are jointed so as to be able to transmit shear force.

The joining plate 40 may be joined to the wooden floor slab 22 not only with the screws 42 but also with an adhesive or the like. Moreover, the upper surface 40U of the joint plate 40 is not limited to being substantially flush with the upper surface 22U1 of the wooden floor slab 22, and may be arranged above or below the upper surface 22U1 of the wooden floor slab 22. Also, the joint plate 40 is an example of a joint member.

As shown in FIG. 3, the upper surface 22U of the wooden floor slab 22 is covered with the first cementitious fireproof covering material 50 except for the edge 22E. In other words, the upper surface 22U2 of the wooden floor slab 22 other than the end 22E is coated with the first cementitious fireproof coating material 50 for fireproofing.

The first cementitious refractory covering material 50 is formed of cement-containing self-leveling material, concrete, grout, mortar, or the like. This first cementitious fireproof covering material 50 is provided integrally with the upper surface 22U2 of the wooden floor slab 22 in a factory or the like, for example.

Specifically, first, a formwork (not shown) surrounding the upper surface 22U2 of the wooden floor slab 22 is temporarily installed. Next, a pre-cured self-leveling material or the like is poured into the mold and cured. After that, the formwork is removed. As a result, the first cementitious fireproof coating material 50 that coats the upper surface 22U2 of the wooden floor slab 22 with a fireproof coating is formed.

Separately from the wooden floor slab 22, the first cementitious fireproof covering material 50 is formed in a plate-like hardened state, and the first cementitious fireproof covering material 50 is superimposed on the upper surface 22U2 of the wooden floor slab 22. They may be joined with an adhesive or the like.

As shown in FIG. 2, the ends 22E of the adjacent wooden floor slabs 22 and the joint plate 40 are covered with a second cementitious fireproof covering material 60 for fireproofing. The second cementitious fireproof covering material 60 is formed of self-leveling material containing cement, concrete, grout, mortar, or the like, like the first cementitious fireproof covering material 50 .

The second cementitious fireproof coating material 60 is formed by pouring a pre-cured self-leveling material or the like between the end surfaces 50T of the adjacent first cementitious fireproof coating materials 50 and curing the material. At this time, the openings on both ends in the longitudinal direction of the first cementitious fireproof coating material 50 adjacent to each other are appropriately closed with a mold (not shown) or the like.

In this embodiment, the second cementitious fire-resistant coating material 60 and the first cementitious fire-resistant coating material 50 are made of the same type of cementitious fire-resistant coating material. However, the second cementitious refractory coating 60 and the first cementitious refractory coating 50 may be formed by different cementitious refractory coatings.

(Floor construction method)
Next, an example of the floor construction method according to this embodiment will be described.

(Floor member installation process)
First, the floor member installation process will be described. In the floor member installation step, a plurality of floor members 20 are respectively installed on the pair of beams 12 (see FIG. 1) and arranged in the longitudinal direction of the pair of beams 12 without gaps. A plurality of floor members 20 are installed adjacent to each other in the longitudinal direction of the pair of beams 12 .

More specifically, as shown in FIG. 3, a plurality of floor members 20 are installed with the ends 22E of the wooden floor slabs 22 adjacent to each other. Then, the end surfaces 22T of the adjacent wooden floor slabs 22 are brought into contact with each other. At this time, the notches 32 formed at the ends 22E of the adjacent wooden floor slabs 22 are combined to form the grooves 30. As shown in FIG.

(Fireproof coating process)
Next, the fireproof coating process will be described. In the fireproof coating process, first, the end portions 22E of the adjacent wooden floor slabs 22 are joined together via the joining plate 40 . Specifically, the joining plate 40 is fitted into the groove 30 formed over the end portions 22E of the adjacent wooden floor slabs 22 . In this state, the joint plates 40 are fixed to the ends 22E of the adjacent wooden floor slabs 22 with a plurality of screws 42, respectively. As a result, the ends 22E of the adjacent wooden floor slabs 22 are joined via the joining plate 40. As shown in FIG.

Next, between the end faces 50T of the adjacent first cementitious fireproof coating materials 50, the second cementitious fireproof coating material 60 before hardening is poured and hardened. At this time, the openings on both ends in the longitudinal direction of the first cementitious fireproof coating material 50 adjacent to each other are appropriately closed with a mold (not shown) or the like. As a result, the upper surface 22U1 of the end portion 22E of the adjacent wooden floor slab 22 and the upper surface 40U of the joint plate 40 are covered with the second cement-based fireproof covering material 60 for fireproofing.

(effect)
Next, the effects of this embodiment will be described.

As described above, the floor construction method according to the present embodiment includes the floor member installation process and the fireproof coating process. In the floor member installation step, the plurality of floor members 20 are installed with the end portions 22E of the wooden floor slabs 22 adjacent to each other.

Next, in the fireproof covering step, the upper surfaces 22U1 of the end portions 22E of the adjacent wooden floor slabs 22 are joined via the joining plate 40. As shown in FIG. In this state, the second cementitious fireproof coating material 60 before curing is poured between the end faces 50T of the adjacent first cementitious fireproof coating materials 50 and cured. As a result, the upper surfaces 22U1 of the ends 22E of the adjacent wooden floor slabs 22 and the upper surface 40U of the joint plate 40 are covered with the second cement-based fireproof covering material 60 for fireproofing.

Here, in this embodiment, the upper surface 22U2 of the wooden floor slab 22 other than the end portion 22E is previously coated with the first cement-based fireproof coating material 50 in a factory or the like. This narrows the construction range of the second cementitious refractory coating material 60 at the site. Therefore, the workability of the second cementitious fireproof covering material 60 is improved.

The first cementitious refractory coating 50 also functions as a formwork for the second cementitious refractory coating 60 . Therefore, temporary installation and removal work of the formwork for the second cementitious fireproof covering material 60 can be reduced. Therefore, the workability of the second cementitious fireproof covering material 60 is further improved.

As described above, according to the floor construction method according to the present embodiment, it is possible to improve workability when the upper surfaces 22U (upper surfaces 22U1) of the plurality of wooden floor slabs 22 are covered with a fireproof coating at the site.

In addition, at the site, by coating the upper surfaces 22U1 of the ends 22E of the adjacent wooden floor slabs 22 with the second cement-based fireproof covering material 60, the gap (joint) between the ends 22E of the adjacent wooden floor slabs 22 is formed. can be blocked by a second cementitious refractory coating 60 . Therefore, the fire resistance of the wooden floor slab 22 is improved.

Furthermore, the upper surface 22U (upper surface 22U2) of the wooden floor slab 22 is provided with a first cementitious fireproof covering material 50 in a factory or the like, leaving the end portion 22E. Therefore, the upper surfaces 22U1 of the end portions 22E of the adjacent wooden floor slabs 22 can be joined via the joining plate 40 at the site. In addition, the upper surface 40U of the joint plate 40 can be fire-resistant coated with the second cement-based fire-resistant coating material 60 . Therefore, the fire resistance of the wooden floor slab 22 is further improved.

Moreover, by using the self-leveling material for the second cementitious fireproof covering material 60, the workability of the second cementitious fireproof covering material 60 is improved. Specifically, the self-leveling material has high fluidity. Therefore, by using a self-leveling material for the second cementitious refractory coating material 60, a smooth surface can be easily formed on site. Therefore, the workability of the second cementitious fireproof covering material 60 is improved.

Further, by using the self-leveling material for the first cementitious fireproof coating material 50, the manufacturability of the floor member 20 is also improved. Furthermore, by using the same type of cementitious fire-resistant coating material for the first cementitious fire-resistant coating material 50 and the second cementitious fire-resistant coating material 60, the first cementitious fire-resistant coating material 50 and the second cementitious fire-resistant coating material 60 It is possible to improve integrity and design.

(Modification)
Next, a modification of the above embodiment will be described.

In the modification shown in FIG. 5, the wooden floor slab 22 is provided with a plurality of screws 70 as anti-slip portions. A plurality of screws 70 are driven into the wooden floor slab 22 from above the first cement-based fireproof covering material 50 . The first cement-based fireproof covering material 50 is fixed to the upper surface 22U2 of the wooden floor slab 22 by these screws 70 . A plurality of screws 70 are engaged with the first cementitious fireproof covering material 50 in the in-plane direction of the wooden floor slab 22 . As a result, displacement of the first cementitious fireproof coating material 50 with respect to the wooden floor slab 22 is suppressed.

Next, in the modification shown in FIG. 6, a plurality of recesses 80 are formed in the upper surface 22U2 of the wooden floor slab 22 as anti-slip portions. The plurality of recesses 80 are formed in a U-shaped cross section (C-shaped cross section) that opens the upper surface 22U2 of the wooden floor slab 22 . Moreover, the plurality of recesses 80 are formed in the shape of grooves extending in a predetermined direction of the wooden floor slab 22 . A first cementitious fireproof covering material 50 is provided on the upper surface 22U2 of the wooden floor slab 22 formed in the plurality of recesses 80 in this manner.

The first cementitious fireproof covering material 50 is formed, for example, by pouring uncured cementitious fireproofing material onto the upper surface 22U2 of the wooden floor slab 22 and curing the cementitious fireproof covering material. A plurality of protrusions 82 to be fitted into the plurality of recesses 80 are formed on the lower surface of the first cementitious refractory coating material 50 . These protrusions 82 and the plurality of recesses 80 are engaged in the in-plane direction of the wooden floor slab 22 . As a result, displacement of the first cementitious fireproof coating material 50 with respect to the wooden floor slab 22 is suppressed.

Next, in the modification shown in FIG. 7, the upper surface 22U2 of the wooden floor slab 22 is provided with the first cementitious fireproof covering material 50 via the concrete 90. As shown in FIG. In other words, on the upper surface 22U2 of the wooden floor slab 22, the concrete 90 and the first cementitious fireproof covering material 50 are laminated. As a result, the fire resistance of the wooden floor slab 22 is enhanced. Furthermore, the concrete 90 increases the weight of the wooden floor slab 22 . As a result, vibration of the wooden floor slab 22 is reduced.

In the modified example shown in FIG. 7, the first cementitious fireproof covering material 50 is provided on the wooden floor slab 22 with concrete 90 interposed therebetween. However, the concrete 90 may be provided on the wooden floor slab 22 via the first cementitious fireproof covering material 50 .

Further, in the above embodiment, the upper surfaces 22U1 of the end portions 22E of the adjacent wooden floor slabs 22 are joined via the joining plate 40. As shown in FIG. However, the bottom surfaces or side surfaces (side end surfaces) of the ends 22E of the adjacent wooden floor slabs 22 may be joined via a joining member such as the joining plate 40 or the like.

Further, in the above embodiment, the joining member is the joining plate 40 . However, the joining member may be, for example, joining hardware, an adhesive, or the like. Furthermore, the end portions 22E of adjacent wooden floor slabs 22 do not necessarily have to be joined.

Further, in the above-described embodiment, the plurality of wooden floor slabs 22 are installed side by side in the lateral direction. However, a plurality of wooden floor slabs 22 may be installed side by side in the longitudinal direction. In this case, the upper surface of the wooden floor slab 22 is coated with the first cementitious fireproof covering material 50, for example, leaving the longitudinal ends of the wooden floor slab 22. As shown in FIG.

Also, a plurality of wooden floor slabs 22 may be installed side by side in the lateral direction and the longitudinal direction. In this case, the upper surface of the wooden floor slab 22 is coated with the first cementitious fireproof covering material 50, for example, leaving the ends of the wooden floor 22 in the lateral direction and the longitudinal direction thereof.

Further, in the above-described embodiment, the upper surface 22U2 of the wooden floor slab 22 is entirely covered with the first cementitious fireproof coating material 50 for fireproofing. However, the upper surface 22U2 of the wooden floor slab 22 may have a region that is not partially covered with the first cementitious fireproof covering material 50 for fireproofing.

Moreover, in the above-described embodiment, the first cement-based fire-resistant coating material 50 is used as the first fire-resistant coating material. However, the first refractory cladding may also be a refractory board such as, for example, a gypsum board or a calcium silicate board.

Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and one embodiment and various modifications may be used in combination as appropriate. It goes without saying that various aspects can be implemented without departing from the scope.

20 floor member 22 wooden floor slab 22E end (end of adjacent wooden floor slab)
22U upper surface (upper surface of wooden floor slab)
22U1 upper surface (upper surface between ends of adjacent wooden floor slabs)
40 joining plate (joining member)
50 First cement-based fireproof coating material (First-series fireproof coating material)
60 Second cementitious fireproof coating material (Secondary fireproof coating material)
70 screw (anti-slip portion)
80 recess (anti-slip portion)

Claims (4)

a floor member installing step of installing a plurality of floor members each having a wooden floor slab and a first fireproof coating material covering the upper surface of the wooden floor slab except at least the end portions thereof, the end portions being adjacent to each other;
A fireproof coating step of flowing a second fireproof coating material between the adjacent first fireproof coating materials and coating the upper surfaces of the adjacent ends with the second fireproof coating material;
floor construction method. In the fireproof coating step, after joining the upper surfaces of the adjacent ends with a joining member, fireproof coating is applied to the upper surfaces with the second fireproof coating material.
The floor construction method according to claim 1. The wooden floor slab is provided with an anti-slip portion that engages with the first fireproof covering material in the in-plane direction of the wooden floor slab.
The floor construction method according to claim 1 or 2. The first refractory coating and the second refractory coating are self-leveling materials,
The floor construction method according to any one of claims 1 to 3.

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