JP3121174B2 - Rainwater storage type planting ground - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rainwater storage type planting ground which can be installed on a rooftop of a building, for example, to prevent urban flooding and to perform greening with plants without watering.

[0002]

2. Description of the Related Art In recent years, as urbanization has progressed due to the spread of sewerage and the use of concrete paving around facilities such as roads and houses, the time required for rainwater to reach peaks in rivers has been shortened, and urban river flooding has occurred frequently. The new urban flood is becoming a social problem.

As a measure for preventing urban flooding, a method is used in which the rooftop of a building is greened with lawns, trees, flowers and the like to impregnate the soil provided on the rooftop of the building with rainwater, thereby suppressing runoff of rainwater. Is believed to be effective.

[0004] However, in this case, the outflow of rainwater is suppressed only by an amount that can be impregnated into the soil disposed on the roof of the building.

By the way, the present inventor has set up a water storage tank under a medium for planting trees, flowers and the like, and when a predetermined amount or more of rainwater has fallen, the water is stored in the water storage tank and, if necessary, stored in the water storage tank. A non-irrigated planter capable of raising and supplying water from a water storage tank to a culture medium has been filed as Japanese Patent Application No. 3-181218.

Therefore, the inventor of the present invention can effectively suppress rainwater outflow and green the roof of a building without irrigation by arranging the non-irrigation type planter in a large size. I thought.

[0007]

However, in order to make the non-irrigation type planter large enough to be installed on the roof of a building, facilities for holding the ground on a water storage tank are required. However, when a plate is used, there is a problem that the cost increases.

[0008] Further, when a predetermined amount of rain falls, water is excessive if water is simply supplied to lawns, trees, flowers and the like planted on the ground while the rainwater is entirely stored in a water storage tank. There was also a problem.

The present invention has been made in view of the above problems, and an object of the present invention is to provide, for example, a method of installing a plurality of buildings on the rooftop of a building to suppress runoff of rainwater by using an adjacent gap to prevent urban flooding. An object of the present invention is to provide a rainwater storage type planting ground with a main object of preventing the occurrence of rainwater.

[0010]

In order to achieve the above object, a rainwater storage type planting ground according to the present invention is provided outdoors with a housing having an open upper end, and a bottomed bottom in the housing. Each water tank filled with porous gravel material, and the ground between the upper part of each water tank and the adjacent water tank and the ground that is provided in and above the water tank and passes through each water tank when a predetermined amount or more of rainwater falls. A water supply limiting sheet having an opening ratio of 0.1 to 10% provided between each water storage tank and the ground; and a water level of each water storage tank disposed in a gap between adjacent water storage tanks, the water level being below the ground of the gap. Drainage means for gradually discharging rainwater to the outside of the housing through the ground when rising from the end face.

[0011] In a preferred embodiment of the present invention,
In claim 1, the lower end surface of the ground provided in the gap is disposed at a position lower than the upper end surface of the water storage tank.

Further, in a preferred aspect of the present invention, in claim 2, the ground is held by a holding plate through which water can pass.

[0013]

The ground on which the plants are planted is integrally held on a plurality of water tanks filled with porous gravel material, a gap between adjacent water tanks, and above the gap.

When it rains, rainwater seeps into the ground. Rainwater moistens the ground, but when it rains more than the amount that can be impregnated into the ground, the rainwater passes through the ground and is mostly impregnated with the porous gravel material in the water tank. It will be stored.
Part of the rainwater is drained from the ground in the gap.

The rainwater stored in the water storage tank rises due to the capillary force of the porous gravel material and is supplied to the ground. At this time, since a water supply limiting sheet having an opening ratio of 0.1 to 10% is provided between the water storage tank and the ground, the rainwater supplied to the ground is raised by the capillary force of the porous gravel material and supplied to the ground. The amount of water is adjusted, and the amount of water is supplied according to the evapotranspiration of the ground and plants, thereby preventing oversupply.

Since the drainage means is provided, when the water level in the water storage tank rises above the lower end surface of the ground in the adjacent gap, rainwater is gradually discharged out of the housing through the ground in the gap.

[0017]

The present invention will be described below in detail with reference to examples. FIG. 1 is a partially cutaway perspective view showing an embodiment of a rainwater storage type planting ground according to the present invention, and FIG.
FIG. 2 is a sectional view taken along line I.

A rainwater storage type planting ground 1 comprises a housing 2 which is installed outdoors and has an open upper end, and a water storage tank 3 which is provided at the lower part of the housing 2 with a bottom and is filled with a porous gravel material 6. And a ground 4 provided above the water storage tank 3 and passed through the water storage tank 3 when a predetermined amount or more of rain falls, and an aperture ratio of 0.1 to 0.1 between the water storage tank 3 and the ground 4.
A 10% water supply restriction sheet 11 is provided. Then, on the ground 4, a plant 8 such as a lawn, a tree, a flower, etc.
Are being planted.

The housing 2 can accommodate the water storage tank 3 and the ground 4, and may be any one that can be installed on the roof of a building, for example. Therefore, its size is preferably determined according to the place where it is installed, concrete, synthetic resin,
Pottery, metal, etc. can be used.

The water storage tank 3 is filled with a porous gravel material 6 such as pumice or perlite. Since the water tank 3 is filled with the porous gravel material 6, the ground 4 can be used without using a facility for holding the ground 4 such as a plate on the water tank 3.
And the water 7 stored in the water storage tank 3 can be raised by capillary force and supplied to the ground 4. In addition, the water storage tank 3 can be one or a combination of two or more as required. Therefore, the size may be determined according to the installation location or the size of the housing 2.
It is preferably about 5 cm. Further, when the amount of water 7 in the water storage tank 3 is insufficient due to, for example, a small amount of rainfall or a small capacity of the water storage tank 3, water other than rainwater, for example, tap water, is supplied. You can also.

The porous gravel material 6 allows the ground 4 to be disposed directly on the water reservoir 3 without hindering the water storage capacity of the water reservoir 3 and allows the water 7 to rise by capillary force. Is preferably filled. Therefore, the particle size of the porous gravelly material 6 is preferably about 0.5 mm to 10 cm.

As the ground 4, ordinary soil can be used, but it is more preferable to use porous granular artificial soil. The porous granular artificial soil is, for example, a substance having a high basic exchange capacity, a substance having a high water retention capacity, and a porous substance containing all or a part of the warming fertilizer, and is lightweight and has a water retention capacity. It is high, has excellent fertilizing power, has good water permeability and air permeability, and does not hinder root elongation. As the artificial soil having such characteristics, for example, “Super Lisole” (trade name, manufactured by Createrra Co., Ltd.) or the like can be used.

It is preferable that a water supply limiting sheet 11 having an opening ratio of 0.1 to 10% is formed between the water storage tank 3 and the ground 4 by, for example, forming a hole 11a. . By arranging the water supply restriction sheet 11, the supply amount of the water 7 in the water storage tank 3, which has risen in the porous gravelly material 6 by the capillary force, to the ground 4, is restricted.
In addition, it is possible to supply only the water 7 in an amount corresponding to the evapotranspiration of the plant 8, and it is possible to prevent the root 8 of the plant 8 from being rotten.

As the water supply restriction sheet 11, for example, a synthetic resin sheet or the like can be used. In this embodiment, holes 11a,
Are provided at predetermined intervals. However, the present invention is not limited to this method. For example, a method of laying strip-shaped sheets at predetermined intervals may be employed.

It is preferable that a water permeable sheet 12 is provided between the water storage tank 3 and the ground 4 so as to overlap the water supply limiting sheet 11. The water-permeable sheet 12 is made of, for example, a nonwoven fabric, which allows water to pass through but does not pass through the roots of the plant 8. The fact that the water-permeable sheet 12 does not pass through the roots of the plant 8 means that the roots extend into the water tank 3 and suck up the water 7 in the water tank 3 excessively, or the roots that have extended into the water tank 3 die and the water tank 3 To prevent the water 7 from rotting. In addition, the method for preventing the elongation of the root of the plant 8 into the water tank 3 is not limited to the arrangement of the water-permeable sheet 12, and for example, a method of distributing a substance containing a biologically active substance trifluralin that inhibits the elongation of the root of the plant 8 is applied. The method of setting up is also adopted.

With the mechanism described above, the rainwater storage type planting ground 1 stores rainwater in the water storage tank 3 and restricts the water 7 raised in the porous gravelly material 6 by capillary force as necessary. The plant 8 can be grown without supplying water to the ground 4 while adjusting the supply amount by the use sheet 11, but the water 7 stored in the water storage tank 3 is gradually discharged out of the housing 2. If the drainage means 5 is provided, when a predetermined amount or more of rain falls, water is temporarily stored in the water storage tank 3 and the drainage means 5 is provided.
Can be drained gradually.

In this embodiment, the drainage means 5 is provided with two or more water storage tanks 3 at predetermined intervals, and in the so-called gap between the adjacent water storage tanks 3, 3, the upper end face of the water storage tank 3 is provided. A holding plate 13 having a large number of holes or a net-like water-permeable structure is disposed at a position lower than a predetermined distance, for example, about 50 mm, and the lower end surface of the ground 4 a on the holding plate 13 So that it is lower than the end face. With this arrangement, when the water level of the water 7 in the water storage tank 3 becomes higher than the lower end surface position of the ground 4 a on the holding plate 13, the water 7 once rises into the ground 4, The water is gradually drained to the drain 14 through the holding plate 13 through the ground 4 a on the holding plate 13 at a low position.

That is, the height H of the water tank 3 and the water tank 3
The difference from the height h from the bottom to the holding plate 13 is, for example, 50
mm, the water surface height of the water 7 in the water storage tank 3 does not exceed h, and the water storage tank 3 can keep a margin of 50 mm, and then receives the water in the water storage tank 3 even if a large amount of rain falls. It is possible to suppress the outflow at the peak time and gradually drain the water.

The drainage means 5 is not limited to this method, but may be any mechanism such as providing a drainage amount adjusting valve or the like, which can store rainfall that has fallen by a predetermined amount or more and gradually drain it.

The rainwater storage type planting ground 1 is disposed outdoors, for example, on the roof of a building. If a large number of the rainwater storage type planting grounds 1 are provided, even if a predetermined amount of rain falls,
The time required for rainwater to reach the peak of the river is prolonged, thereby preventing urban river inundation and preventing urban flooding. In addition, the roof of the building can be greened without irrigation.

[0031]

As described above, the rainwater storage type planting ground of the present invention has a plurality of water storage tanks disposed under the ground, and when a predetermined amount or more of rain falls, the rainwater Can be stored in a water tank, and if necessary, drainage means can be provided using the ground in the gap between adjacent water tanks so that drainage can be gradually drained. This will prevent urban river flooding and prevent urban flooding.

In particular, since the drainage means is configured to allow rainwater to pass through the ground in the gap between the adjacent water tanks, when the water level in the water tank rises above the lower end surface of the ground disposed in the gap between the adjacent water tanks. The drainage speed can be buffered by the ground, and can be gradually discharged out of the housing.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing one embodiment of a rainwater storage type planting ground according to the present invention.

FIG. 2 is a sectional view taken along line II in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rainwater storage type planting ground 2 Hazing 3 Water storage tank 4 Ground 5 Drainage means 6 Porous gravel material 7 Water 8 Plant 11 Water supply restriction sheet 12 Water permeable sheet

Claims (3)

(57) [Claims] 1. A housing which is installed outdoors and has an open upper end, respective water storage tanks provided at the lower part of the housing with a bottom and filled with porous gravel material, and an upper part of each water storage tank adjacent to the water storage tank A ground provided in the gap between the water tanks and the upper part thereof and passing through each water tank when a predetermined amount or more of rainwater falls, and an opening ratio of 0.1 to 10% provided between each water tank and the ground.
Water supply limiting sheet and drainage disposed in a gap between adjacent water tanks and gradually draining rainwater out of the housing through the ground when the water level of each water tank rises above the lower end surface of the ground in the gap. And a rainwater storage type planting ground. 2. The rainwater storage planting ground according to claim 1, wherein a lower end surface of the ground provided in the gap is disposed at a position lower than an upper end surface of the water storage tank. 3. The rainwater storage type planting ground according to claim 2, wherein said ground is held by a holding plate through which water can pass.