JPH10102468A - Flat drainage material - Google Patents

Abstract

(57) [Abstract] [Problem] As a planar drainage material to be laid on the bottom of a roof garden of a building, there is no restriction on the orientation at the time of laying, and even if sediment etc. accumulates locally inside, a drainage interruption part occurs That can maintain a good drainage guiding function over a long period of time. SOLUTION: A water-permeable filter sheet 3 is stretched and integrated with a water-impermeable sheet-like base material 1A provided with a large number of projections 2 on at least one side thereof in contact with the tops of the projections 2 ... .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is directed to laying on the bottom of an embankment portion of a garden installed on a building frame such as the roof of a building or indoors, on the bottom surface and slope of a landfill for reclaiming industrial waste and garbage. The present invention relates to a plate-shaped or sheet-shaped planar drainage material which performs a drainage guiding function.

[0002]

2. Description of the Related Art Generally, in a roof garden of a building or a garden in a building, vegetation is planted on a concrete skeleton by embankment. If excess water due to watering or rainfall stays, root rot of the vegetation occurs. And there is a concern that water may enter the concrete body. Therefore, in order to prevent these, it is necessary to efficiently extract excess water from the bottom of the embankment portion and guide it to a required drainage portion.

Conventionally, as shown in FIG. 6, a nonwoven fabric 12 is provided on both sides or one side of a sheet-like base material 10 made of a rigid synthetic resin molded body having a large number of parallel grooves 11 formed on the front and back surfaces. A flat drainage material with a structure attached is used. By laying such a flat drainage material at the bottom of the embankment portion of the garden, water oozing out from the bottom of the embankment passes through the nonwoven fabric 12 and flows into the grooves 11. It leads to the drainage section.

[0004]

However, in the above-mentioned conventional flat drainage material, since the drainage is performed through the linear grooves 11, it is necessary to lay the grooves 11 in a direction in which the grooves 11 are inclined downward toward the drainage portion. In addition, there are large restrictions on the arrangement, and fine particles of the soil flowing into the groove 11 together with the water through the eyes of the nonwoven fabric are deposited, and breakage of the nonwoven fabric caused by invasion of the roots of plants and digging of stones at the time of embankment. Part to groove 11
If earth or sand gets into the inside of the trench 11 and it is clogged at one point, the trench 11 cannot be drained, and the water that has accumulated halfway overflows. There was a drawback that the function was significantly reduced.

In view of the above-mentioned circumstances, the present invention provides a planar drainage material that is laid on the bottom of a roof garden of a building or the like to perform a drainage guiding function, without any restrictions on the orientation at the time of laying, and locally inside. It is an object of the present invention to provide a material that does not generate a drainage interruption part even when soil and the like accumulate and can maintain a good drainage guiding function for a long period of time.

[0006]

In order to achieve the above object, a flat drainage material according to claim 1 of the present invention is provided on a water-impermeable sheet-like substrate having a large number of projections on at least one side. And a structure in which a water-permeable filter sheet is stretched and integrated over the tops of the projections.
Thus, in this planar drainage material, water that has passed through the water-permeable filter sheet flows into the space between the sheet-shaped substrate and the water-permeable filter sheet, but this space is not divided over the entire sheet-shaped substrate. Since the drainage channel is formed, the flow of water in that direction is not impeded regardless of the direction of the gradient to the drainage portion, and thus there is no restriction on the direction in laying the flat drainage material, and Even if sediment accumulates in the area, there will be no drainage interruption.

According to a second aspect of the present invention, in the flat drainage material of the first aspect, the water-impermeable sheet-like base material is made of a hard synthetic resin, and the water-permeable filter sheet is made of a synthetic fiber nonwoven fabric. doing. Therefore, with this flat drainage material, the filter sheet can be set tough and the projections that support it have rigidity, so the load bearing strength is sufficient to support the weight of earth and sand placed on it and secure the internal space. Is obtained, and the whole can be handled as a panel due to the rigidity of the sheet-like base material. Further, in manufacturing the flat drainage material, the nonwoven fabric can be easily fixed to the top of each projection of the sheet-like base material by heat fusion.

According to the third aspect of the present invention, the first or second aspect is provided.
In the planar drainage material, since the side edge of the water-permeable filter sheet is fixed to the side edge of the sheet-shaped base material, earth and sand may flow from the side edge into the internal space. Therefore, the excellent drainage induction action can be stably maintained for a longer period.

According to a fourth aspect of the present invention, in the flat drainage material according to any one of the first to third aspects, the projection of the sheet-like base material has a pin-like shape having a large-diameter head at a tip end. As a result, the bearing area of the water-permeable filter sheet by the projections increases, and the load resistance of the filter sheet improves accordingly.

[0010]

1 to 4 show a single-sided filter type flat drainage material A according to an embodiment of the present invention. The flat drainage material A is stretched over a water-impermeable sheet base 1A having a large number of projections 2 projecting at regular and horizontal intervals on one side, and a top 2a of the projections 2. Left and right side edges 3a, 3a of the filter sheet 3 are fixed to the side edges 1a of the sheet-like base material 1A (see FIG. 3), and the sheet base material is formed. 1A and the filter sheet 3, the flat drainage material 1
A drainage space 4 communicating with the entirety of A is configured. Thus, each projection 2 of the sheet substrate 1A is formed in a pin shape having a large diameter head 2a.

The sheet substrate 1A is made of a thermoplastic synthetic resin such as polypropylene, polyethylene, polyvinyl chloride, thermoplastic synthetic rubber or the like. Generally, a flat sheet is formed into a roll with holes under heating. After forming the projections 2... Corresponding to the holes of the roll on one side of the sheet by applying pressure, the projections 2.
Is manufactured by a method in which a top portion is pressed and crushed to form a large diameter head 2a at the tip of each projection 2. Thus, by forming the sheet substrate 1 from a hard resin material, the projections 2 are provided with rigidity for supporting the weight of the earth and sand or the like placed on the water-permeable filter sheet 3 to secure the space 4. In addition to this, the flat drainage material A becomes easy to handle as a panel.

The water-permeable filter sheet 3 may be any sheet having a filter function of removing solid particles such as earth and sand and permeating a liquid such as water. Examples of such a sheet include nonwoven fabrics, nets, woven fabrics, and glass cloths. Although a water-permeable material such as polypropylene or polyester can be used, a nonwoven fabric of synthetic fibers such as polypropylene and polyester is particularly preferable. In other words, by using a nonwoven fabric of synthetic fibers, it is possible to easily impart toughness and good water permeability that bear the load-bearing strength against the weight of the earth and sand and the like placed thereon,
When producing the flat drainage material A, the projections 2 of the sheet-like base material 1A are fixed to the tops 2a, and the side edges 3a, 3a.
Can be easily fixed to the side edge portion 1a of the sheet-like base material 1 by means of heat fusion such as high-frequency heating, ultrasonic heating, and thermocompression bonding. In the case of other water-permeable materials, an adhesive is used for the above-mentioned fastening.

The flat drainage material 1A having the above-described configuration is laid on the bottom of a bank embankment of a garden installed on a building frame such as the roof of a building or indoors, with the water-permeable filter sheet 3 facing upward, Lay along the bottom and slope of the landfill for waste and garbage. In the latter landfill, the bottom and the slope are generally covered with a waterproof sheet made of rubber, polyvinyl chloride, polyethylene or the like, but the flat drainage material A may be laid on the waterproof sheet. After the above laying, earth and sand and landfill deposits will be placed on the stretched surface of the water-permeable filter sheet 3 and the weight thereof will be loaded on the stretched surface. Of the filter sheet 3 and the sheet-like substrate 1 are not easily broken or depressed.
The space 4 between the space A and the space A is sufficiently secured.

Thus, the water oozing through the earth and sand or the landfill sediment (sewage in the landfill for landfill) passes through the water-permeable filter sheet 3 and flows into the space 4 for drainage. Since the sheet-shaped base material 1A communicates without a break throughout the entire base material 1A, it flows along the slope of the upper surface of the sheet-shaped base material 1A, that is, the slope of the laying surface that is set in advance to be lower toward the drainage portion. It flows into the drainage part from the edge of the flat drainage material 1A. Therefore, this flat drainage material A
There is no restriction on the orientation when laying, and even if sediment or the like can locally accumulate in the space 4 for some reason, the water simply flows around the accumulating point and does not cause a drainage impervious part. Has little effect on functionality.

Since the side edges 3a, 3a of the water-permeable filter sheet 3 are adhered to the side edges 1a of the sheet-like base material 1A at the left and right side edges of the flat drainage material A, The flow of earth and sand into the space 4 from above is prevented.
When laying a plurality of flat drainage materials A, as shown in FIG. 4, the side edges of the adjacent flat drainage materials A, A should be abutted, and the abutting portion should be sealed with a sealing material 5. Thereby, a continuous impermeable layer can be formed on the surface of the concrete skeleton 6, etc., so that reliable drainage can be performed in a state where the laying surface of the concrete skeleton 6, etc. is completely prevented from getting wet. In addition, if it is laid on the seepage control sheet in the landfill for landfills such as industrial waste and garbage, it will help to protect the seepage control sheet.

FIG. 5 shows a double-sided filter type flat drainage material B according to a second embodiment of the present invention. This flat drainage material B
In this example, a large number of projections 2... Similar to those of the sheet base 1A of the first embodiment are integrally provided on the front and back surfaces of the water-impermeable sheet base 1B at regular intervals in the vertical and horizontal directions. On the front and back of the substrate 1B, the same water-permeable filter sheets 3 and 3 as those of the first embodiment are respectively provided with the tops 2a of the projections 2 having a large diameter.
The drainage spaces 4a and 4b are provided so as to be stretched therebetween, and communicate with the entire surface of the planar drainage material 1B on both sides of the sheet base 1B. Although not shown, at the left and right side edges of the flat drainage material, the front and back filter sheets 3 and 3 are respectively adhered to the side edges of the sheet-like substrate 1B as in the first embodiment. You.

The two-sided filter-type flat drainage material B is similar to the one-sided filter-type flat drainage material A of the first embodiment, and is used to fill the bottom of the embankment of a garden installed on a building frame.
By laying on the bottom and slope of the landfill depression, the same drainage guiding action as described above can be exerted through the upper drainage space 4a. However, since the drainage space 4b is also formed on the lower surface side of the sheet base 1B, for example, in the case of application to the above-mentioned landfill, if it is laid directly on the ground without passing through a waterproof sheet, it will As a result, water seeping out from the ground side enters the lower drainage space 4a through the water-permeable filter sheet 3, and is guided to a predetermined drainage section such as a drainage basin or a wastewater basin through this space 4a. Further, in addition to being laid at the bottom of the earth and sand or the sediment as described above, for example, the water leaking from the ground on both sides is interposed in a state of being erected on an embankment portion such as a development ground, so that the drainage spaces 4a, 4 It is also possible to function as a vertical drainage channel which receives each of them in 4b and drains downward.

The flat drainage material of the present invention is not limited to the configuration of the flat drainage materials A and B of the above embodiment. For example, it is necessary to consider the inflow of soil and the like from the side depending on the installation condition. If there is no, the side edges on both sides of the water-permeable filter sheet 3 may have a structure that is not adhered to the side edges of the sheet-like substrate. Further, the water-permeable filter sheet 3 has a size such that the periphery thereof protrudes outward from the peripheral edge of the sheet-shaped base material, and the protruding portion is folded toward the back surface side of the sheet-shaped base material except for the side facing the drainage portion, It is also possible to prevent the inflow of earth and sand from the side. On the other hand, the height and thickness of the projections 3 of the sheet-like substrate, the arrangement interval, the arrangement configuration, the shape of the head 3a, the thickness and the strength of the water-permeable filter sheet 3, and the like depend on the required load resistance and application conditions. Various settings can be made.

[0019]

According to the first aspect of the present invention, as a flat drainage material laid on the bottom of a roof garden or the like to perform a drainage guiding function, the drainage material is projected from the surface of a water-impermeable sheet-like base material. A water-permeable filter sheet is stretched between the tops of a large number of projections, and the space between the sheet base material and the filter sheet is a drainage space communicating with the entirety. Therefore, even if sediment or the like accumulates locally, there is provided a drainage blocking part which can maintain a good drainage guiding function for a long period of time.

According to the second aspect of the present invention, the flat drainage material has a panel shape which is easy to handle as a whole, and can set a large load-bearing strength, and has a water-permeable property with respect to a sheet-like base material during its production. What can provide a filter sheet easily by heat fusion is provided.

According to the third aspect of the present invention, since the side edge of the water-permeable filter sheet is fixed to the side edge of the sheet-like base material as the above-mentioned flat drainage material, earth and sand or the like is attached to the side edge. Without draining into the internal space from above, so that excellent drainage guiding action can be stably maintained for a longer period of time.

According to the fourth aspect of the present invention, as the flat drainage material, the projection of the sheet-like base material has a large-diameter head at the tip, and the head increases the bearing area of the water-permeable filter sheet. Therefore, a filter sheet having excellent load resistance is provided.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a flat drainage material according to a first embodiment of the present invention.

FIG. 2 is a partially broken plan view of the flat drainage material.

FIG. 3 is a longitudinal sectional view showing a configuration example of both side edges of the same flat drainage material.

FIG. 4 is a longitudinal sectional view of a main part showing a laid state of the flat drainage material.

FIG. 5 is a longitudinal sectional view of a flat drainage material according to a second embodiment of the present invention.

FIG. 6 is a longitudinal sectional view showing an example of a conventional flat drainage material.

[Explanation of symbols]

 A, B ... plane drainage material 1A, 1B ... sheet-like base material 1a ... side edge 2 ... projection 2a ... head 3 ... water-permeable filter sheet 3a ... side Edge 4,4a, 4b ・ ・ ・ Drainage space

Claims (4)

[Claims] 1. A planar drainage material in which a water-permeable filter sheet is stretched and integrated with a water-impermeable sheet-like substrate having a large number of projections on at least one side thereof in contact with the tops of the projections. 2. The flat drainage material according to claim 1, wherein the water-impermeable sheet-like substrate is made of a hard synthetic resin, and the water-permeable filter sheet is made of a nonwoven fabric of synthetic fibers. 3. The flat drainage material according to claim 1, wherein a side edge of the water-permeable filter sheet is fixed to a side edge of the sheet-like substrate. 4. The flat drainage material according to claim 1, wherein the projections of the sheet-shaped base material are pin-shaped having a large-diameter head at a tip.