JPH0723647B2 - Drain burying method for flat Deck slab - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial field of application) The present invention relates to a method for burying drainage drains in a slab such as a rooftop of a building or a balcony or balcony, and in particular, slab concrete is provided on the upper surface of a flat deck. The present invention relates to a method for burying drainage for drainage in a flat deck slab that has been cast.

(Prior Art) Conventionally, as for the slabs such as the roof of a building and a balcony or balcony, there are many corrugated deck slabs A in which slab concrete 2 is cast on the upper surface of the corrugated deck 1 as shown in FIG. In such a corrugated deck slab A, when various pipes, cables (not shown), etc. are provided in the slab, since the concave portion of the corrugated deck 1 can be used, the corrugated deck 1
The thickness H ₁ from the uppermost surface to the upper surface of the slab concrete 2 on the upper side was as small as about 75 mm.

Therefore, the drainage drain 3 is buried in the corrugated deck slab A as shown in the figure. In other words, a hole 1a is made at a desired location of the corrugated deck 1 at the construction site, and a mounting plate 4 with a mounting hole 4a is welded 4b on the upper side of the hole 1a so as to be overlaid.
The vertical gutter pipe connecting tubular portion 5a below the drain-shaped drain body 5 is fitted into the mounting hole 4a of the mounting plate 4 so as to be dropped from above. The drain body 5 is positioned by screwing fixing screws 6 into the anchor mounting portions 5b at three locations around the lower surface side of the drain body 5 so as to penetrate from below the corrugated deck 1 and the mounting plate 4 respectively. Fix it. In this state, a slab concrete 2 is cast on the corrugated deck 1 to a predetermined thickness by fitting a curing lid (not shown) on the drain body 5.

After the drain main body 5 is embedded and fixed in this way, the curing lid covering the drain main body 5 is removed to remove the drain main body 5
A sheet waterproof layer 7 for waterproofing the slab A is drawn in on the upper surface of the slab A, a waterproof layer retainer 8 which is a constituent member of the drainage drain 3 is placed on the sheet waterproof layer 7, and it is fastened and fixed by a retainer bolt 9 and a nut 10. Further, a strainer 11 which is also a constituent member of the drainage drain 3 is fitted thereon. Further, a vertical gutter pipe 12 is screwed into the vertical gutter pipe connecting tubular portion 5a below the drain body 5 from below. With the above, the burial construction of drainage drain 3 was completed.

(Problems to be solved by the invention) By the way, recently, in place of the above-mentioned corrugated deck 1,
The development of flat decks with high strength has progressed, and the number of buildings that use flat deck slabs made by placing slab concrete on the top surface of these flat decks has increased.

However, in such a flat deck slab, since the flat deck itself has a flat upper surface and does not have a recess unlike the corrugated deck, in order to provide various pipes, cables, etc. in the slab, the slab above the flat deck is placed above the flat deck slab. The thickness to the top surface of concrete must be at least about 130 mm. When the drainage drain 3 of the standard size used for the corrugated deck slab A is buried in such a place by the conventional method shown in FIG. 3, the height of the drain body 5 is insufficient, and the drain body 5 is slab. Problems such as not being deeply buried in the concrete and being unable to hold down the waterproof layer 7 occurred.

The present invention has been made in view of the above circumstances.For a flat deck slab in which slab concrete is thickly placed on the upper surface of the deck, the drain main body in which the drain drain height is insufficient can be easily and accurately adjusted in height. It is an object of the present invention to provide a method in which the upper surface of the drain body and the upper surface of the slab concrete can be buried so that the upper surfaces thereof are at the same height.

[Structure of Invention]

(Means and Actions for Solving Problems) The drainage drain burying method for a flat deck slab of the present invention is
In order to achieve the above purpose, a hole is made at a desired location of the flat deck on the construction site, and a deck reinforcing plate with a mounting hole is overlaid on the upper side by welding in place, while the mounting hole of the deck reinforcing plate is A height adjusting spacer that can receive the drain body from the lower side is fitted in advance at a factory or construction site, and the fitting depth of the spacer to the mounting hole of the deck reinforcing plate is adjusted to match the slab concrete and the top surface of the site. The spacer is welded and fixed to the deck reinforcing plate so that the drain body can be held at the same height, and in this state the spacer body is fitted and received from above and the upper end of the drain body is cured. A cover is fitted, and in this state, slab concrete is cast on the flat deck to embed and fix the drain main body.

With such a method, the drain main body, in which the height of the drainage drain is insufficient, can be accurately adjusted and arranged with respect to the flat deck slab in which the slab concrete is thickly placed on the upper surface of the deck. It becomes possible to bury the upper surface of the drain body and the upper surface of the slab concrete at the same height.

(Embodiment) An embodiment of the present invention will be described below with reference to FIG. In the figure, the same components as those shown in FIG. 3 are designated by the same reference numerals to simplify the description.

First, B in the figure shows a flat deck slab such as a rooftop of a building or a balcony / balcony, which is a flat deck 11 having a flat upper surface and a plurality of inverted T-shaped ribs 11a on the lower side, It consists of slab concrete 12 placed on the upper surface of this flat deck 11. The slab concrete 12
In order to provide various pipes, cables (not shown), etc. in the slab, it is cast so that the thickness H ₂ from the flat deck 11 to the upper surface is at least 130 mm or more.

When such a flat deck slab B is to be buried with a drainage drain 3 similar to the standard size of the corrugated deck slab A shown in FIG. 3, the drain main body of the drainage drain 3 is to be buried. The height dimension of 5 is considerably smaller than the thickness H ₂ of the slab concrete 12 in the flat deck slab B, and the drain main body 5 when simply buried as it is
However, there is a problem that it is deeply buried in the slab concrete 12.

Therefore, the drain main body 5 is appropriately height-adjusted and positioned so that such a problem does not occur, and the drain main body 5 and the slab concrete 12 upper surface are buried at the same height.

That is, first, a hole 11b is made at a desired position of the flat deck 11 of the flat deck slab B at the construction site. On the other hand, a cylindrical height adjusting spacer 13 having an appropriate length so that the upper end can be fitted to the stepped outer periphery of the vertical gutter pipe connecting tubular portion 5a at the bottom of the drain body 5, and a size such that the spacer 13 can be slidably fitted. A deck reinforcing plate (14) having a mounting hole (14a) formed in the center thereof is prepared in advance, and the spacer (13) is fitted into the mounting hole (14a) of the deck reinforcing plate (14). In that state, the height h ₁ from the deck reinforcing plate 14 to the upper end of the spacer 13 and the height h ₂ from the outer peripheral step surface of the drain main body 5 with which the upper end of the spacer 13 abuts to the upper end of the drain main body 5 The sum is equal to the thickness H ₂ of the slab concrete 12 cast on the upper surface of the flat deck 11 at the construction site, the fitting depth of the spacer 13 to the mounting hole 14a of the deck reinforcing plate 14 is adjusted, In the adjusted state, a spacer is attached to the deck reinforcing plate 14.
13 is welded 13a and fixed.

In this way, the deck reinforcing plate 14 with the spacers 13 welded in advance is carried to the construction site, and the lower part of the spacer 13 is inserted into the hole 11b of the flat deck 11 there, and the deck reinforcing plate 14 is placed on the upper surface of the flat deck 11. Then, the outer peripheral portion of the deck reinforcing plate 14 is directly welded 14b to the flat deck 11 and fixed in an overlapping manner. Then, the vertical gutter pipe connecting tubular portion 5a of the lower portion of the drain body 5 is fitted into the spacer 13 from above, and the drain body 5 is fitted into the spacer 13 with its upper end surface having a predetermined thickness H ₂ afterward. It is held at the same height as the upper surface of the slab concrete 12 that is to be cast.

In this state, the temporary fixing plate 15 is attached to the lower end of the spacer 13.
Further, the curing lid 16 is fitted on the upper end of the drain body 5, and the rubber tube 17 is fitted on the holding bolt 9 protruding upward. Then, through the center of the drain body 5, attach one fixing bolt 18 to the temporary fixing plate 15 and the curing lid.
16 and the lock nut 19 is screwed to the lower portion of the drain nut 5 via the washer 20 and the drain main body 5 is fixed by tightening the wing nut 21. In addition, if necessary at this time, the lower gutter connection tubular portion of the drain body 5
As shown by the imaginary line in the figure 5a, a screw pad for foam molding etc.
Press in 22 to prevent foreign matter from adhering. An anchor 23 bent in an L shape is screwed and fixed to each anchor attachment portion 5b on the outer periphery of the drain body 5.

This completes the preparation for embedding, and in this state, the slab concrete 12 is cast on the flat deck 11 to a predetermined thickness of H ₂ to fix the drain body 5 by embedding. After the drain main body 5 is embedded and fixed in this way, the wing nut 21 is loosened and the fixing bolt 18 is pulled out, the temporary fixing plate 15 at the lower end of the spacer 13 is removed, and the curing lid 16 and the rubber tube 17 at the upper end of the drain main body 5 are removed. Remove. Also, remove the screw pad 22. Although not shown thereafter, as in the conventional case shown in FIG. 3, a sheet waterproof layer 7 for waterproofing the slab A is drawn into the upper surface of the drain body 5, and the waterproof layer which is a constituent member of the drainage drain 3 is drawn thereon. The layer presser 8 is placed, and it is tightened and fixed by the presser bolt 9 and the nut 10. Further, a strainer 11 which is also a constituent member of the drainage drain 3 is fitted thereon.
Further, a vertical gutter pipe 12 is screwed into the vertical gutter pipe connecting tubular portion 5a of the lower portion of the drain body 5 through a spacer 13 from below. With the above, the burying construction of the drainage drain 3 is completed, and the flat deck slab B in which the slab concrete 12 is thickly placed is placed so that the upper surface of the drain main body 5 and the upper surface of the slab concrete have the same height. The drain body 5 can be embedded and fixed, and the above-mentioned problems can be eliminated. Further, the deck reinforcing plate 14 is overlaid on the flat deck 11 so as to be in close contact therewith, and is fixed to the flat deck 11 by welding. Therefore, the flat deck 11 is mechanically fixed by this deck reinforcing plate 14. There is an advantage that it can be reinforced to reliably prevent its deformation.

FIG. 2 shows another embodiment of the present invention. First, at the construction site, the deck reinforcing plate 14 is welded 14a to the upper surface of the flat deck 11 and fixed in an overlapping manner. After that, the height adjusting spacer 13 is fitted into the mounting hole 14a of the deck reinforcing plate 14, and the spacer 13 receives the drain body 5 in the same manner as described above, and the temporary fixing plate.
Tighten and fix 15 and the curing lid 16 with the fixing bolt 18, the lock nut 19 and the tightening wing nut 21. In that state, the positioning height of the drain body 5 is adjusted by the height adjuster 30 described later, that is, the fitting depth of the spacer 13 into the mounting hole 14a of the deck reinforcing plate 14 is adjusted, and finally the spacer is adjusted. 13 to deck reinforcement plate 14
It is a method of welding 13a to and then placing slab concrete 12.

Here, the height adjusting tool 30 is a height adjusting bolt 31 that is pre-screwed into each of the anchor mounting portions 5a at three locations around the lower surface side of the drain main body 5 and hangs down, and is screwed to the bolt 31 so as to be rotatable. And a high nut 32 with a pedestal, and before the spacer 13 is welded 13a to the deck reinforcing plate 14, the high nuts of the height adjusting tools 30 at three locations around the
By rotating 32, the height of the drain main body 5 is slab concrete 12 whose upper end surface is to be sunk to a thickness of H ₂ later.
Adjust to the same height as the top surface of. After this, the spacer 13 is welded 13a to the deck reinforcing plate 14.
In other words, this is a method that allows easy and appropriate height adjustment at the construction site. Also, the bolts 31 and high nuts of the height adjusting tools 30
32 will be buried in the slab concrete 12 as it is and will also serve as an anchor.

In each of the above-described embodiments, the temporary fixing plate 15 and the curing lid 16 at the upper end are fixed by the fixing bolts 18 at the lower end so that the drain body 5 fitted on the spacer 13 does not float when the slab concrete 12 is placed. Although the drain main body 5 is fixedly fixed to the spacer 13 by tightening, the present invention is not limited to this, and screw holes (not shown) are formed at a plurality of positions near the upper end of the spacer 13, and the screw holes are respectively provided outward. Alternatively, a pressing screw may be screwed to fix and fix the drain body 5. Other various changes may be made without departing from the scope of the present invention.

[Effect of device]

Since the present invention has been made as described above, the drain main body in which the height of the drainage for drainage is insufficient is easily and accurately adjusted and positioned with respect to the flat deck slab in which the slab concrete is thickly placed on the upper surface of the deck. As a result, it becomes possible to bury the drain main body upper surface and the slab concrete upper surface at the same height, and the drainage drain used for the corrugated deck slab can be directly buried in the flat deck slab without any problem. To be

[Brief description of drawings]

FIG. 1 is a partially sectional construction view showing an embodiment of the present invention, FIG. 2 is a partially sectional construction view showing another embodiment of the present invention, and FIG. 3 is a conventional example. It is a partially completed burying completed state figure. 3 ... Drainage drain, 5 ... Drain body, B ... Flat deck slab, 11 ... Flat deck, 11a ... Hole, 12 ... Slab concrete, 13 ... Height adjusting spacer, 14 ... Deck reinforcing plate, 14
a ... Mounting hole, 16 ... Curing lid.

Claims (1)

[Claims] 1. A construction method for burying drainage drains in a flat deck slab such as a rooftop or a veranda formed by casting slab concrete on the top surface of the flat deck, and forming holes at desired locations on the flat deck at the construction site. At the same time as opening the deck reinforcing plate with mounting holes on the upper side by welding in place, the mounting holes of the deck reinforcing plate have height adjustment spacers that can receive the drain body from the lower side in advance at a factory or the like. The spacer is deck reinforced so that the drain body can be held while the top surface is flush with the slab concrete at the site by adjusting the fitting depth of the spacer to the mounting hole of the deck reinforcing plate while mating at the site. Welded and fixed to the plate, and in this state, fit the drain body to the spacer from above and receive it, and fit the curing lid on the upper end of the drain body. In flat drainage drain embedding method into flat deck slabs, characterized in that by Da設 the concrete slab on the deck is embedded fixing the drain body.