JPH1037409A - Water-proof method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method wherein a waterproof sheet is uniformly press- fitted on a bed slab without bend in a press plate and dislocation is not produced on the waterproof sheet. SOLUTION: The waterproof method lays a number of waterproof sheets 2 on the bed slab 1 of a building in rows, at the time the edge part of the two adjacent waterproof sheets 2 are overlapped, a steel plate-made band press plate 6 is overlapped on the peripheral part and the overlapped part, concrete screws 4 are driven at prescribed intervals in the longitudinal direction of the press plate 6, and the waterproof sheet 2 is fixed on the bed slab 1. The press plate 6 on which projections 6a having same height are integrally formed along both the side edges of one face as the press plate 6 is used by directing the projections 6a downward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for waterproofing a roof or a roof of a building.

[0002]

2. Description of the Related Art As a waterproofing method for a roof or a roof of a concrete building, as shown in FIG.
A large number of waterproof sheets 2 made of synthetic resin or rubber are laid side by side, and the edges of two adjacent waterproof sheets 2 are overlapped at that time, and a strip-shaped holding plate made of steel is arranged along the peripheral portion and the overlapping portion. 3 in the longitudinal direction of the holding plate 3
A method is known in which concrete screws 4 are driven at intervals of 500 mm to fix the waterproof sheet 2 to the base slab 1.
The concrete screw 4 has an anchor 5 that is opened after driving.

However, since the pressing plate 3 is a flat band-shaped flat bar having a thickness of 0.5 to 2.0 mm, only the portion in contact with the head of the concrete screw 4 is strongly pressed. Part floats up due to bending,
For this reason, there has been a problem that the waterproof sheet 2 is displaced and the screw holes of the waterproof sheet 2 are widened by tension, and tears are generated around the screw holes. Further, in particular, when the surface of the base slab 1 has irregularities, the irregularities cannot be absorbed by the thickness and deformation of the waterproof sheet 2, so that it is difficult to fix the waterproof sheet 2 uniformly.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a waterproofing method in which a waterproof sheet can be uniformly pressed on an underlayer slab without causing bending of a pressing plate, and no displacement occurs in the waterproof sheet. Another object of the present invention is to provide a waterproofing method capable of uniformly fixing the waterproof sheet by absorbing the unevenness when the unevenness exists in the base slab.

[0005]

According to the waterproofing method of the present invention, a large number of waterproof sheets are laid side by side on a foundation slab of a building, and at that time, the edges of two adjacent waterproof sheets are overlapped. In the waterproofing method in which a strip-shaped pressing plate made of a steel plate is overlapped on the peripheral portion and the overlapping portion, concrete screws are driven at predetermined intervals in the length direction of the pressing plate, and the waterproof sheet is fixed to the foundation slab. A pressing plate in which ridges having the same height are integrally formed along both side edges on one side is used with the ridges facing downward.

The pressing plate used in the present invention is made of a steel plate having a thickness of 0.5 to 2.0 mm as in the prior art, and has a width of 10 to 50 mm.
It is a strip-shaped one. However, on one side, ridges having the same height are formed along both side edges by bending a strip or any other method. The preferred height of the ridge depends on the width of the holding plate, but is set to about 0.5 to 5.0 mm. If the height of the ridge is too low, there is no effect as a ridge.

In the present invention, since the above-mentioned holding plate is used, its bending rigidity is improved, and when a large number of concrete screws are driven into the holding plate overlaid on the waterproof sheet on the foundation slab at a predetermined interval and fixed, Even if the pressing plate slightly bends in the middle of the width direction, it does not bend at each part along the ridge, and the portion of the waterproof sheet that comes into contact with the ridge is uniformly pressed to the base slab. Therefore, the waterproof sheet is not displaced, and the screw hole of the waterproof sheet is not widened to cause tearing.

[0008] A foamed rubber sheet can be laminated on the back surface of the waterproof sheet. In this case, even if there are irregularities on the surface of the base slab, the irregularities are absorbed by the foamed rubber sheet on the back surface. Enables uniform fixation. However, the thickness of the foamed rubber sheet is preferably 0.5 to 3.0 mm. If the thickness is less than 0.5 mm, the effect of absorbing unevenness cannot be obtained because the thickness is too small. Is too thick to be firmly held down due to its flexibility.

Further, a double-sided adhesive tape made of a natural curable rubber can be interposed between the waterproof sheet and the pressing plate and between the overlapping portions of the waterproof sheets. In this case, by the natural hardening of the double-sided pressure-sensitive adhesive tape after the construction, the frictional force between the front and back surfaces of the double-sided pressure-sensitive adhesive tape increases, and the displacement between the holding plate and the waterproof sheet and between the overlapping portions of the waterproof sheets are more unlikely to occur. Become. In addition, examples of the natural curable rubber include ethylene propylene diene rubber, chlorosulfonated polyethylene, and butyl rubber. The thickness of the double-sided pressure-sensitive adhesive tape is preferably 0.3 to 2 mm, and the width is preferably 10 to 50 mm.

The waterproof sheet used in the present invention is the same as the conventional waterproof sheet, and is a resin sheet made of polyvinyl chloride or other synthetic resin, a rubber sheet made of rubber such as natural rubber or synthetic rubber, and a rubber sheet made of such rubber. And a reinforced rubber sheet or the like reinforced with a fiber such as a woven or knitted fabric.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 In FIG. 1, reference numeral 1 denotes a base slab on the roof of a building, and reference numeral 2 denotes a rubber waterproof sheet. The waterproof sheet 2 is reinforced with a synthetic fiber fabric, and has a thickness of 0.5 to 2 mm and a width of 1.0 to 2.0.
m and a length of 3.0 to 8.0 m, and two adjacent sheets are laid so as to overlap with a width of 50 to 200 mm. A strip-shaped pressing plate 6 is placed along the peripheral edge and the overlapping portion of the waterproof sheet 2.
Concrete screws 4 are driven into the waterproof sheet 2 and the base slab 1 at intervals of 50 to 500 mm, and the anchors 5 are spread to fix the waterproof sheet 2.

As shown in FIG. 2 (a), the pressing plate 6 has a width of 10 to 5 mm and is made of a steel plate having a thickness of 0.5 to 2.0 mm.
0 mm strip, height 0.5 along both sides
A ridge 6a of about 5 mm is formed downward by bending, and a screw hole 6b is provided between the left and right ridges 6a at 50 to 500 mm.
Drilled at mm intervals. Therefore, the rigidity of the holding plate 6 is greatly improved as compared with the case where the ridge 6a is not provided,
When the waterproof sheet 2 is fixed to the base slab 1 by driving the concrete screw 4 from the screw hole 6b, the portion of the waterproof sheet 2 pressed by the ridge 6a is strongly and uniformly pressed to the base slab 1, and therefore, The displacement of the waterproof sheet 2 is prevented, and no tearing occurs.

The holding plate 6 shown in FIG.
The ridge 6a is formed by bending both side edges of the flat bar at a right angle, but the cross-sectional shape of the ridge 6a can be arbitrarily deformed. For example, as shown in (b), a channel steel can be formed by extrusion, and the ridge 6c can be formed in a triangular cross section. Further, as shown in (c), both side edges of the flat bar may be bent downward by 180 degrees to form the ridge 6d. Further, as shown in (d), both side edges of the flat bar may be curved in a U-shaped convex downward to form the ridge 6e. Furthermore, the intermediate portion between the left and right ridges is not limited to being flat, and an upwardly convex arch-shaped intermediate portion 6f may be formed as shown in FIG.

Embodiment 2 As shown in FIG. 3, a foamed rubber sheet 2a having a thickness of 0.5 to 3.0 mm is laminated in advance on the back surface of the same rubber waterproof sheet 2 as in Embodiment 1 above. 2
The waterproof sheet 2 is laid with the a facing downward. Otherwise, as in the first embodiment, the holding plate 6 is overlaid, and the concrete sheet 4 is driven in to fix the waterproof sheet 2 to the base slab 1. In the second embodiment, since the foamed rubber sheet 2a absorbs irregularities on the surface of the base slab 1, the followability of the waterproof sheet 2 to the base slab 1 is improved, and even if the base slab has some irregularities, it can be uniformly fixed. It becomes possible, and the displacement of the waterproof sheet 2 is further reduced. Note that, as in the first embodiment, the pressing plate 6 can be replaced with one shown in FIG. 2 or another.

Third Embodiment As shown in FIG. 4, the same rubber waterproof sheet 2 as in the first embodiment is laid, a pressing plate 6 is placed on a peripheral portion and an overlapping portion of the adjacent waterproof sheet 2, and concrete screws 4 are attached. The waterproof sheet 2 is fixed to the base slab 1 by driving. However, in the third embodiment, a thickness of 0.3 to 2.0 mm made of a natural curable rubber such as ethylene propylene diene rubber or chlorosulfonated polyethylene is provided below the pressing plate 6 and the overlapping portion of the waterproof sheet 2. Width 10-20
mm double-sided adhesive tape 7 is sandwiched. In the third embodiment, until the double-sided adhesive tape 7 is hardened, the adhesiveness prevents the waterproof sheet 2 from being shifted with respect to the holding plate 6 and the offset between the waterproof sheets 2 in the overlapping portion. After the hardening of the waterproof sheet 7, the displacement of the waterproof sheet 2 with respect to the pressing plate 6 and the displacement between the waterproof sheets 2 of the overlapping portion are prevented by the frictional force of the front and back surfaces. Note that the holding plate 6 can be replaced with that shown in FIG.

Embodiment 4 In the embodiment 2 shown in FIG. 3, between the lower surface of the presser plate 6 and the foamed rubber sheet 2a on the lower surface of the upper waterproof sheet 2 and the upper surface of the lower waterproof sheet 2 at the overlapping portion of the waterproof sheet 2. The waterproof sheet 2 described above is laid while sandwiching the double-sided adhesive tape 7 of the third embodiment, and is fixed with the holding plate 6 and the concrete screw 4. In the fourth embodiment, the surface unevenness of the base slab 1 can be absorbed, and the frictional force at the insertion portion of the double-sided adhesive tape 7 increases, so that the displacement of the waterproof sheet 2 at the fixed portion is further reduced. In addition,
The holding plate 6 can be replaced with that shown in FIG.

[0017]

As described above, the first aspect of the present invention provides
Since the holding plate is provided with ridges on both side edges, its bending rigidity is improved, and the part of the waterproof sheet that contacts the ridge is pressed uniformly to the base slab, so the waterproof sheet is displaced To prevent the screw holes from spreading and leading to tearing.

The invention described in claim 2 is the same as the invention described in claim 1.
In the described invention, a foamed rubber sheet having a thickness of 0.5 to 3.0 mm is preliminarily laminated on the back surface of the waterproof sheet, so that the surface unevenness of the base slab is absorbed by the foamed rubber sheet, and therefore, the waterproof sheet is uniformly fixed. Becomes easier.

Further, the invention described in claim 3 is the first invention.
In the invention described in the item (2), since a double-sided adhesive tape made of a natural curable rubber is interposed between the waterproof sheet and the pressing plate and between the overlapping portions of the waterproof sheets, the displacement of the waterproof sheet is more reliably prevented. be able to.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment.

FIG. 2 is a cross-sectional view showing a modification of the holding plate.

FIG. 3 is a sectional view of a second embodiment.

FIG. 4 is a sectional view of a third embodiment.

FIG. 5 is a sectional view of a conventional example.

[Explanation of symbols]

 1: Base slab 2: Waterproof sheet 2a: Foam rubber sheet 4: Concrete screw 5: Openable / closable anchor 6: Holding plate 6a, 6c, 6d, 6e: Ridge 6b: Screw hole 6f: Arch-shaped intermediate part 7: Natural Double-sided adhesive tape made of curable rubber

Claims (3)

[Claims] 1. A large number of waterproof sheets are laid side by side on a foundation slab of a building, and at this time, edges of two adjacent waterproof sheets are overlapped, and a strip plate made of a steel plate is formed on a peripheral portion and an overlapping portion thereof. In the waterproofing method in which the holding plates are stacked and concrete screws are driven at predetermined intervals in the length direction of the holding plates to fix the waterproof sheet to the base slab, the holding plates have the same height along both side edges on one side. A waterproofing method, characterized in that a press plate integrally formed with a ridge is used with the ridges facing downward. 2. A waterproof sheet having a thickness of 0.5 to 0.5 mm on the back surface.
2. The waterproofing method according to claim 1, wherein a laminated rubber sheet having a thickness of 3.0 mm is used. 3. The waterproofing method according to claim 1, wherein a double-sided pressure-sensitive adhesive tape made of a natural curable rubber is interposed between the waterproof sheet and the pressing plate and between overlapping portions of the waterproof sheets.