JPS6257770B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method for raising the height of a concrete slab, which is extremely easy to perform, and is particularly suitable for raising the height of a concrete slab when it is necessary to adjust the floor height on the same floor due to the design. We are trying to provide a construction method suitable for construction.

Conventionally, in raising construction where the floor height is adjusted, especially on the same floor, if concrete is poured according to the desired floor height, if the raised amount is large, the height of the raised part will depend on the thickness of the concrete. Since the weight would be too large, lightweight embedding materials such as expanded polystyrene moldings and cardboard boxes were embedded in the raised part to reduce the amount of concrete.
Attempts have been made to reduce the overall weight of the raised area, but it is cumbersome and inefficient to securely fix the embedding material to match the amount of raised area applied to the concrete slab. Stacking multiple layers of filling materials increases the overall height, which has the disadvantage of tending to lack overall stability. For this reason, there has been a demand for the development of a construction method that can simply and reliably fix the embedded material according to the amount of elevation.

Therefore, in order to satisfy the above-mentioned needs, the present invention attempts to provide a concrete slab raising construction method using a very simple method that is far more efficient than conventional construction. An embedded material consisting of an object is placed on a concrete floor plate to which a locking tool has been fixed in advance, a holding member is placed on the embedded material, and a connecting member is used to connect the holding member and the above-mentioned locking tool. The feature is that after connecting and fixing the embedded material, concrete is poured onto the concrete floor plate.

Next, an embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a locking tool, which has a substantially conical base 10 and a shaft 11 extending from the upper part. A threaded portion 12 is formed (see especially FIG. 2). The above-mentioned locking tool 1 is
It is placed in advance on the formwork A for concrete pouring, and is temporarily secured by nailing or the like so that it does not move (see Fig. 1).

Then, after appropriately arranging reinforcement (not shown), concrete is poured to form the concrete floor plate 3. In the above manner, the locking tool 1 is embedded and fixed with its upper portion exposed (see FIG. 3).

Then, an embedding material 2 made of a lightweight solid material, for example a synthetic resin foam, preferably a polystyrene foam, is placed on the concrete floor plate 3. At this time, the embedding material 2 is placed between the rows of the locking tools 1.
The embedding material 2 may be either a solid body or a hollow body, but it is most convenient to use a split type that can be stacked in multiple stages, since the height can be freely selected.

Then, a short flat plate-shaped holding member 4 is placed between the adjacent embedded materials 2 and 2 so as to face the fixture 1 that has been fixed in advance, and a long bolt is attached to the holding member 4. Insert the connecting member 5 in the shape of
The tip thereof is screwed into the threaded part 12 of the locking tool 1 to connect the holding member 4 and the locking tool 1, and the embedded material 2 is pressed down and fixed to the concrete floor board 3 (see FIG. 4). Next, after appropriately arranging reinforcement (not shown), an upper layer of concrete c for floor height adjustment is placed on the concrete floor plate 3, thereby forming a raised concrete slab S (see Fig. 5). ).

Various types of fasteners 1 can be used as the fasteners 1 that are fixed to the concrete floor plate 3 in advance, such as those that are approximately L-shaped and have a threaded portion 12' at the tip (see Fig. 6), or those that are approximately Ω-shaped. The connecting member 5' can be hooked onto the hooked part (see Fig. 7), and the connecting member 5' can be hooked onto the head with a ring-shaped nail. 5' hook (8th
For the latter two, the locking tool 1 is inserted before the poured concrete for forming the concrete floor plate 3 completely hardens.
It is fixed when the concrete hardens, and the embedded material 2 is held down by a nut N on the top of the connecting member 5'.
Just screw it in.

On the other hand, there is also an implementation in which the locking tool 1 is fixed after the fact to a pre-formed concrete floor plate. In this case, a hole 31 is made in the concrete floor plate 3, and the locking tool 1 is driven into the hole 31 and fixed. The fixing method is to use a wedge to spread out the driving part and press it against the wall of the hole, and fix it using frictional force (see Figure 9), or to fix it by pouring adhesive into the hole. (not shown) can be adopted.

In addition to the short plate-shaped holding member 4 described above, it may also be a long piece such as a bar or angle that holds down multiple rows of buried materials in series. In particular, as shown in FIG. If a welded member is used and the presser member 4 is provided floating above the embedded material 2, the presser member 4 can be used as it is as a spacer, and reinforcing reinforcement can be easily arranged (see FIG. 11).

Furthermore, as the concrete floor plate 3, in addition to being cast on-site, a PC board can also be used.

On the other hand, as a plurality of embedding materials 2 to be stacked, each of the embedding materials 2 has unevenness 2 that fits into each other when stacked.
By forming fitting portions in the form of 1 and 22, it is possible to prevent misalignment of each other, making the work of fixing the embedded material even easier and achieving stronger fixation (see Figures 12 to 22). (See Figure 15). Further, as the embedding material 2, water-resistant cardboard can also be used.

Further, as the connecting member 5, in addition to the illustrated bolt-like member, iron wire, wire, etc. can also be used.

According to the construction method according to the invention as described above,
On the concrete floor plate 3 to which the locking tools have been fixed in advance,
The embedding material 2 made of lightweight solid material is placed, and the embedding material 2
After arranging the holding member 4 on top and fixing the embedded material 2 by connecting the holding member 4 and the locking tool 1 with the connecting member 5, an upper layer of concrete for floor height adjustment is placed on the concrete floor plate 3. Since this is a construction method in which C is cast, the work of fixing the embedded material 2 to the concrete floor plate 3 can be carried out very easily and efficiently using the above-mentioned locking tool 1 and connecting member 5, etc. Embedment material 2 can also be firmly installed during concrete pouring.
will not shift or float,
With good anchorage, reliable burial construction can be achieved.

In particular, it is possible to fix the connecting member 5 in accordance with the height of the buried material 2 by adjusting the screwing amount of the connecting member 5, and more secure fixing can be achieved.
If various lengths are used, the embedding material 2
It is an extremely convenient construction method, as it is easy to fix according to the height of the roof, and can easily accommodate a wide variety of raised heights.

Therefore, it is possible to provide a suitable construction method that can greatly contribute to shortening the construction period and reducing costs of raising construction, and can be applied to raising the floorboards of bridges as well as buildings such as apartment complexes, general buildings and warehouses. become.

[Brief explanation of the drawing]

The figures illustrate embodiments of the present invention, and FIG. 1 is a perspective view showing the construction in progress, FIG. 2 is a sectional view of the locking tool, and FIGS. 3 and 4 are perspective views showing the construction in progress. Figure 5 is a sectional view showing the completed construction, Figures 6~
FIG. 9 is a sectional view of a modified example, FIG. 10 is a perspective view showing a modified example of the pressing member, and FIG. 11 is a sectional view of the modified example.
Fig. 12 is a perspective view showing an example of changing the embedding material;
The figure is a cross-sectional view of the previous figure when in use, FIG. 14 is a perspective view showing another modification of the embedding material, and FIG. 15 is a cross-sectional view of the previous figure when in use. 1... Locking tool, 2... Embedded material, 3... Concrete floor board, 4... Holding member, 5, 5'... Connection member, A... Formwork for concrete pouring.

Claims (1)

[Scope of Claims] 1. An embedding material made of a lightweight solid material is placed on a concrete floor plate to which a locking tool has been fixed in advance, and a holding member is placed on the embedding material, and a connecting member is attached to the embedding material. A concrete slab raising construction method characterized by connecting a holding member and the above-mentioned locking tool to fix the embedded material, and then pouring concrete onto a concrete floor plate. 2. The concrete slab according to claim 1, wherein the locking device that is pre-fixed to the concrete floor plate is temporarily fixed onto the concrete pouring formwork and then embedded and fixed by pouring concrete. Raised construction method. 3. Concrete slab raising construction according to claim 1 above, wherein the locking device that is pre-fixed to the concrete floor plate is inserted and fixed into the concrete before the poured concrete completely hardens. Law. 4. The method for raising the height of a concrete slab according to claim 1, wherein the fasteners that are fixed in advance to the concrete floor plate are embedded and fixed in the perforations of the formed concrete floor plate. 5. The concrete slab raising construction method according to claim 1, wherein the embedding material is made of a synthetic resin foam. 6. The method for raising the height of a concrete slab according to claim 1, which uses a plurality of stacked embedding materials. 7. The concrete slab raising construction method according to claim 1, wherein the locking tool is a substantially conical base with an extending shaft having a threaded portion at the upper end. 8. The concrete slab raising construction method according to claim 1, wherein the locking tool is L-shaped and has a threaded portion at the upper end. 9. The method for raising the height of a concrete slab according to claim 1, in which the locking tool is approximately Ω-shaped. 10. The method for raising the height of a concrete slab according to claim 1, wherein the locking tool is a nail with a ring-shaped head. 11. The method for raising the height of a concrete slab according to claim 1, in which the locking tool is a wedge whose driving part expands. 12. The concrete slab raising construction method according to claim 1, wherein the locking tool is fixed with an adhesive at the perforation.