JP2002084889A - Water-retaining pad for greening rooftop and vegetation base and industrial method for greening rooftop - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water-retaining pad which can suitably be used for an industrial method for greening a rooftop and can simplify the structure of a water retaining and draining layer, to provide a vegetation base using the pad, and to provide an industrial method for greening the rooftop. SOLUTION: This plate-like, water-retaining pad 6 used for an industrial method for greening the rooftop 1 of a building, characterized by comprising the solidified product of fibers with a foamed polyurethane and compression- molding longitudinal and latitudinal grooves a, b on the back side of the pad. The vegetation base for greening the rooftop, characterized by laying a root- resistant sheet 5 on the water-proof treated portion 4 of the rooftop 1, setting the water-retaining pad 6 onto the root resistant sheet 5, applying a vegetation base material 8 to the water-retaining pad 6 to form a vegetation base 9, and then allowing plants to vegetate in the vegetation base 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water retention pad for rooftop greening in a building, a vegetation base and a greening method using the pad.

[0002]

2. Description of the Related Art For example, in office buildings and condominiums, prefabricated houses, tile-roofed houses, and tin-roofed houses, in order to insulate solar heat in summer, the roof of the roof or the attic of a room on the top floor. However, there is a considerable temperature difference between the room on the rooftop exposed to the sun and the room on the lower floor, especially in a tin-roofed house.

Therefore, in recent years, the rooftop of a building has been waterproofed, and a vegetation base has been formed in the waterproofing portion. Vegetation such as cut grass, rolled turf, lawns, flowers, shrubs, and the like have been formed on the vegetation base. Go and do greening to give your eyes peace,
The vegetation base is used as thermal insulation, and the water is sprayed to surpass the heat.

[0004] When greening the roof, it is extremely important to provide the vegetation base with appropriate water retention and drainage properties. Therefore, conventionally, as shown in FIG. After waterproofing with asphalt, a waterproof protective sheet 23 is
And a panel 25 for accommodating, for example, a perlite 24 for water retention is placed on the sheet 23.

The permeable mat 26 and the permeable sheet 2 are provided to prevent the roots of the vegetation from flowing while having water permeability.
7 is laid, a vegetation base material 28 is constructed on the sheet 27, and vegetation is performed on a vegetation base 29 formed by these 23 to 28.

The above-mentioned panel 25 is a pearlite 24.
A storage section 30, a groove 31 for partitioning the storage section 30,
This is a synthetic resin molded product provided with a groove 32 for communicating the accommodating portion 30 with the groove 31 and a panel joint 33 having a locking structure, and a through hole is formed in the groove bottom plate.

[0007]

Since the vegetation base 29 according to the above configuration has appropriate water retention and drainage of surplus water, a favorable growth environment for the introduced plants can be obtained. However, as the structure of the water retention / drainage layer,
In addition to the complicated and high-cost panel 25 having a complicated shape, the waterproof protection sheet 23, the water-permeable mat 26, and the water-permeable sheet 27 have a complicated four-layer stacked structure, so that the construction cost is very high, and However, there is a problem in that a large amount of construction time is required.

Further, the labor for supplying the perlite 24 to the large number of storage portions 30 formed on the panel 25 becomes enormous, and the panel 25 is broken by stepping on the panel 25 during this supply. Therefore, careful work is required, which also leads to an increase in the construction time, and furthermore, the panel 2 is taken into consideration in consideration of a damaged surface.
In addition to the fact that the shape of the panel 25 is complicated, it is very difficult to cut the panel 25 into an arbitrary shape because the shape of the panel 25 is complicated. There was also a problem in this respect.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and has as its object to provide a water retention pad which can simplify the structure of a water retention / drainage layer, and to use the pad to reduce cost. Another object of the present invention is to provide a vegetation base that can be reconstructed in a short time and in a short time, and a rooftop greening method capable of greening at a low cost with simple labor.

[0010]

That is, the water retention pad used for rooftop greening according to the present invention is made of a solidified fiber and polyurethane foam, and is formed by compressing vertical and horizontal grooves on the back surface. (Claim 1).

[0011] The water retention pad having the above-mentioned structure is compressed and formed with a solidified fiber and foamed polyurethane, so that it exhibits a high root resistance function (a function of preventing the passage of vegetation roots). In addition, since the pad contains fibers, it has both water retention and water permeability functions, and furthermore, the vertical and horizontal grooves on the back of the pad form drainage channels for excess water that has passed through the pad, ADVANTAGE OF THE INVENTION According to this invention, the water retention / drainage layer of a vegetation base can be comprised only by one water retention pad.

Also, since the whole structure is simply formed into a plate shape, the water retention pad can be obtained at low cost, and can be cut into an arbitrary shape by a cutter or the like. Easily possible, and
There is no worry about damage if you step on it.

At the time of rooftop greening, a root-resistant sheet is laid on the waterproofing part of the roof, and the water retention pad having the above configuration is installed on the root-resistant sheet, while a vegetation base material is installed on the water retention pad. In this case (claim 2), a vegetation base for rooftop greening can be created in a short time.

That is, in contrast to the conventional means in which the water retention / drainage layer has a four-layered structure, the present invention only uses the root-resistant sheet and the water retention pad constituting the water retention / drainage layer. Substrate construction time is greatly reduced.

In addition to the simplification of the water retention / drainage layer, the water retention pad is inexpensive, and the water retention pad is hardly damaged even if it is stepped on. A significant reduction is achieved.

Here, since the water retention pad exhibits a high root resistance function, it is not particularly necessary to lay a root resistance sheet, but the root resistance sheet is provided in consideration of safety. According to the present invention, a vegetation base having a favorable growth environment for the introduced plant can be obtained by using the water retention pad having both appropriate water retention and air permeability.

As a rooftop greening method, the above-mentioned vegetation base is formed on a rooftop, and vegetation sheets such as cut turf and roll turf, vegetation sheets on which plant seeds are adhered, and vegetation bases are transplanted to the vegetation base. Plant seeds sown on a vegetation base,
By performing vegetation with at least one of the plant seeds previously mixed with the vegetation base (claim 3), greening and insulation on a rooftop using the vegetation base as a heat insulating material are achieved at the same time as greening of the eyes.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show the procedure of implementing the greening method on the rooftop 1 of a building.

When implementing the greening method, first, as shown in FIG. 1, the curb 2 is divided so as to separate the green area from the promenade.
Are placed on the rooftop 1 with a good design appearance.

The roof 1 made of slab concrete
Although the waterproof layer 3 is originally applied to the green area, the waterproof layer 3 in the green area surrounded by the curb 2 is subjected to waterproof treatment by, for example, painting of asphalt 4 or applying a waterproof sheet. is there.

Next, as shown in FIG. 2, a 1.3 mm-thick synthetic resin root-resistant sheet (for example, vinyl chloride or non-vulcanized rubber) is provided so as to cover the curb 2 and the waterproofing section 4. 5) is laid.

Next, as shown in FIG. 3, water retention pads 6 are installed so as to stand up along the inside of the curb 2 and to cover the root-resistant sheet 5, and adjacent water retention pads are provided. 6, 6 are joined to each other with an adhesive tape 7,
Since the butt joints t of the water retention pads 6 and 6 are sealed, and then the root-resistant sheet 5 covered over the curb 2 is folded back to the water retention pad 6 installed along the inside of the curb 2. is there.

At this time, the water retention pad 6 is not raised along the inside of the curb 2 and the water retention pad 6 is
Alternatively, the ends may be cut so as to conform to the above arrangement, and the water retention pad 6 may be laid only on the root-resistant sheet 5.

The means of butt joining of the water retention pad 6 is not limited to the above-mentioned adhesive tape 7, but a notch such as unevenness is formed at the joint end of the water retention pad 6, and this notch is formed. Means such as joining chips,
Further, it is possible to make a change such as adding a joint using an adhesive tape to the joint portion formed by the notch.

As the water retention pad 6, at least one of fiberized synthetic resin products such as PET bottles, fibers of cutting waste, and fibers obtained from cloth such as collected clothes is selected. Then, the fibers are solidified by foamed polyurethane and compression-molded into a plate shape so as to form vertical and horizontal grooves a and b on the back surface (the installation surface on the root-resistant sheet 5) as shown in FIG. Consisting of

More specifically, a solidified product of the fiber and the foamed polyurethane is introduced into a press machine, and the length A is set to 10 mm.
00mm, width B is 1000mm, thickness T is about 20
mm water retention pad 6 is compression-molded, and at the time of this compression molding, nine grooves a are vertically A
Direction, and three grooves b are formed in the horizontal B direction at a pitch of 300 mm, so that the specific gravity of the whole becomes about 0.15 to 0.5.

The depth of each of the grooves a and b is about 10 mm, the side wall c of the groove a is formed with a 45-degree inclined surface, and the side wall d of the groove b is formed almost vertically with a draft. However, this is an example of molding, and the dimensions A, B, and T, the groove pitch, the groove depth, and the groove shape are arbitrarily set.

Next, as shown in FIG. 4, a vegetation base material 8 is constructed on the water retention pad 6 so as to fill up the folded portion of the root-resistant sheet 5 to form a vegetation base 9 for rooftop greening. Then, as shown in FIG.
Then, vegetation such as transplanting of flower seedlings or cutting of lawn grass is performed to complete the greening method of the rooftop 1.

According to the above-mentioned greening method, the water retention pad 6 used for forming the vegetation base 9 has not only a high root resistance function but also a water retention function and a water permeability function, and Since the vertical and horizontal grooves a and b on the back surface of the pad form a drainage channel for surplus water that has passed through the pad 6, a water retention / drainage layer having excellent root resistance can be obtained simply by installing a single water retention pad 6. Be composed.

The water retention pad 6 has a simple plate-like structure made of recycled fiber material or cutting waste fiber, and can be obtained at low cost. Because the water retention / drainage layer is simplified as described above, the vegetation base 9 can be formed in a short time under the improvement of workability and the drastic reduction of construction cost. .

Further, since the water retention pad 6 can be easily cut into an arbitrary shape by a cutter or the like, even if the curb 2 is arranged in a complicated shape in design, it can be cut along the shape. The construction of all the pads 6 can be easily performed in a short time.

The fibers used for the water retention pad 6 are as follows:
The use of fibers made from recycled materials such as PET bottles has the advantage of helping to prevent pollution, but it goes without saying that it is not limited to such fibers.

Here, as the vegetation base material 8, appropriate water retention and ventilation are provided so that the weight per unit volume is reduced and the decrease in the thickness of the vegetation base 9 over time is reduced. In order to obtain a vegetation base 9 having a good growth environment for the introduced plant by combining the properties with the vegetation, and having sufficient fertilizing power and exhibiting flame retardant properties, pumice or calcined pearlite 65 to 85% by volume of the porous inorganic material, and 35 to 1 of the vegetable organic material such as peat moss and bark compost.
And a mixture of 5% by volume.
In order to further improve the quality of the growing environment of the introduced plant and to further reduce the weight of the vegetation base material 8, 70 to 8 of the porous inorganic material can be used.
It is preferable to mix 0% by volume and 30 to 20% by volume of the vegetable organic material.

From this, in this embodiment, 35.3% by volume of pumice (bora earth), 35.5% by volume of calcined perlite (pearlite), and 11.8% by volume of peat moss
A mixture of 11.8% by volume of bark compost and 5.9% by volume of incinerated ash for acid correction is used. Since it is lightweight, there is an advantage that the vegetation base 9 with a small load burden can be constructed on the roof 1.

However, the above mixing ratio is a preferable example, and the mixing ratio can be arbitrarily changed, and when the mixing ratio is arbitrarily changed, the specific gravity at the time of wetness is 0.5 to 0.5.
It is desirable to set it to about 0.8.

In the above-described embodiment, vegetation such as transplanting of seedlings of flowers and turfing of cut turf is performed for greening, but instead or in addition to this, for example, Polyvinyl alcohol is used as a vegetation sheet in which plant seeds are sandwiched between corrosive materials such as water-soluble paper and cotton wool, along with fertilizers and soil amendments, and corrosive materials that enable germination and growth of plant seeds. A vegetation sheet or the like in which plant seeds are adhered and held together with a fertilizer or a soil improving material via a water-soluble paste such as the above is installed on the upper surface of the vegetation base 9, or the plant seeds are sown on the vegetation base 9, The plant seeds are contained in the vegetation base material 8, and the vegetation base material 8 is used to create a vegetation base 9 or to transplant a shrub seedling or an adult tree to introduce vegetation. Is also good.

[0037]

As described above, according to the first aspect of the present invention, it is easy to cut into an arbitrary shape, it is hard to break, and the structure of the water retention / drainage layer can be simplified. The water retention pad has a high root resistance and is provided at low cost.

According to the second aspect of the present invention, there is provided a vegetation base capable of greatly shortening the creation time, improving workability, and greatly reducing the construction cost.
According to the invention described above, a greening method is provided in which rooftop greening is achieved in a short time and at low cost.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the arrangement of curbs and the situation of waterproofing in a rooftop greening method.

FIG. 2 is an explanatory diagram showing a laying state of a root-resistant sheet.

FIG. 3 is an explanatory diagram showing the installation state of a water retention pad.

FIG. 4 is an explanatory diagram showing a state of creation of a vegetation base by construction of a vegetation base material.

FIG. 5 is an explanatory diagram showing a state of rooftop greening due to the construction of vegetation.

FIG. 6 is a perspective view of the water retention pad as viewed from the back side.

FIG. 7 is a configuration diagram of a conventional vegetation base.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rooftop, 4 ... Waterproof treatment part, 5 ... Root-resistant sheet, 6 ... Water retention pad, 7 ... Adhesive tape, 8 ... Vegetation base material, 9 ... Vegetation base, t ... Joint.

Claims (3)

[Claims] 1. A plate-like water retention pad used for a rooftop greening method for a building, comprising a solidified product of fiber and polyurethane foam, and having a vertical and horizontal groove formed on a back surface by compression molding. Water retention pad for rooftop greening. 2. A vegetation base for rooftop greening, wherein a root-resistant sheet is laid on a waterproof treatment part on the roof, and the water-retaining pad according to claim 1 is installed on the root-resistant sheet. A vegetation base for rooftop greening characterized by being constructed with a vegetation base material on top. 3. The vegetation base according to claim 2 is constructed on a rooftop, and the vegetation base is transplanted to a turf such as cut turf or roll turf, a vegetation sheet having plant seeds adhered thereto, and a vegetation base. A planting method using a plant to be planted, a plant seed sowed on a vegetation base, and at least one of plant seeds previously mixed on the vegetation base.