TW201302050A - A substrate board for water storage and drainage, and a green-making structure using the substrate board - Google Patents

Abstract

The invention provides a substrate board A for water storage and drainage, characterized by vertically disposing first supporting columns 31 and second supporting columns 32 in a recess portion 20 for water storage, wherein the water storage recess portion 20 is divided by surrounding walls 10 (11, 12) which serve as retaining and embankment walls, and the upper surface of the first supporting column 31 is equal to or higher than the supper surface of the surrounding walls 10, while the upper surface of the second supporting column 32 is lower than the supper surface of the surrounding walls 10. A planting soil G disposed on a water-absorbing flake B is in a state of a storing water W when entering into the recess portion 20 in the proximity of the second supporting column 32, and the storing water W is aspirated and sucked into the planting soil G by capillary attraction. In the proximity of the surrounding walls 10, the breathing action of hair roots will not be hindered because an air layer is formed between the water storage W and the water-absorbing flake B. Thereby, the storing water W in the recess portion 20 can be effectively aspired and sucked in when using a green-making structure C formed on a man-made ground base D of the substrate board A for water storage and drainage.

Description

Water storage drainage base plate and green structure using the same

The present invention relates to a water storage and drainage foundation plate suitable for use in roof greening and the like, and a green structure using the same.

In recent years, as a part of urban greening or as a heat island countermeasure, it is recommended to plant plants on the artificial foundation of the concrete structure such as the roof surface of an apartment building or an underground ceiling surface such as an underground parking lot and an underground storage tank. Carry out greening. However, it is difficult to ensure water storage and drainage properties in the artificial foundation of the concrete structure. Therefore, a water storage drainage base plate formed by using a foamed resin or the like is disposed on the artificial foundation, and the water-permeable sheet is partitioned thereon. Additional soil and planting blankets are used as green structures.

Patent Document 1 describes an example of a water storage and drainage base plate used for greening of such an artificial foundation. The water storage and drainage base plate is made of a foamed resin, and is a region of a concave inclined surface in a region partitioned by a peripheral wall functioning as a bank, and the region is made lower than the top surface of the peripheral wall. . Further, a plurality of concave holes are formed in the inclined surface, and water necessary for planting is accumulated in the concave holes. In the greening of the artificial foundation, the water storage and drainage base plate is covered on the artificial foundation, and after the water-permeable sheet such as a non-woven fabric is covered thereon, the soil is piled up.

Patent Document 2 discloses a water storage and drainage base plate formed of a foamed resin molded article or the like, the water storage and drainage base plate having a water storage recessed portion partitioned by a peripheral wall functioning as a bank; and a plurality of pillars Department It is erected in the recess for water storage. Here, the pillars are all equal in height and are the same as the aforementioned peripheral wall or higher than the aforementioned peripheral wall. In the case of the greening of the roof, in the same manner as the water-storage and drainage base plate described in the above-mentioned Patent Document 1, a plurality of sheets are spread over the artificial foundation, and a water-permeable sheet such as a non-woven fabric is placed thereon, and a passenger is formed thereon. Soil layer.

In the water storage and drainage base plate of the form described in the patent document 2, the pillar which is erected in the water storage recessed portion is substantially the same height as the peripheral wall which functions as a bank, and the height is compared with the circumference. The pillars of the high wall. Since the water permeable sheet disposed on the water storage and drainage base plate is supported by the tops of the pillars of different heights on the back side, it is possible to form a downwardly convex curved surface.

(previous technical literature) (Patent Literature)

[Patent Document 1]: Japanese Laid-Open Patent Publication No. Hei 6-225627

[Patent Document 2]: JP-A-2001-169665

[Patent Document 3]: JP-A-2008-212124

In the water-storage and drainage base plate of the shape described in the patent document 1, when a water-permeable sheet such as a nonwoven fabric is placed on the upper surface thereof, the entire surface of the water-permeable sheet is easily adhered to the concave inclined surface of the water storage and drainage base plate. It is difficult to form an air layer between the guest soil layer (or the planting blanket, etc.) and the water storage and drainage base plate. Therefore, the supply of oxygen to the root portion is insufficient to cause an unsuitable growth of the plant.

In the water-storage and drainage base plate of the shape described in the patent document 2, since the water-permeable sheet is supported by the top of a plurality of pillars having a high height which is erected in the water storage recess, it is easy to form on the back side of the water-permeable sheet. The space has the advantage of ensuring the gas permeability between the guest soil layer (or the planting blanket, etc.) and the water surface of the water stored in the water storage and drainage base plate. Thereby, oxygen supplied to the root can be ensured.

In the water-storage and drainage base plate of the shape described in Patent Document 3, since the water-permeable sheet is supported by the tops of the pillars of different heights from the back surface, it is possible to form a curved surface whose back surface is convex downward. Thereby, it is possible to prevent water from flowing directly down the downstream side of the back surface of the water permeable sheet, and as a result, the water can surely flow from the water permeable sheet to the water storage recess. Therefore, in the water storage recessed portion of the water storage and drainage base plate, a sufficient amount of water can be secured.

The present inventors made plants by laying such a water-storage drainage base plate on an artificial foundation and disposing a water-permeable sheet thereon, and arranging a planting blanket and a guest soil thereon to manufacture a green structure on an artificial foundation. Cultivation. In the course of the process, there is an experience of using the water storage and drainage base plate as described in Patent Document 2 or 3, by the top surface of the plurality of pillars which are provided in the water storage recess of the water storage and drainage base plate In the case of supporting the water-permeable sheet, it is possible to secure the water-storage and drainage base plate for supplying the space for the oxygen to the root portion on the back side of the water-permeable sheet, according to the type of the planting blanket and the guest soil placed on the water-permeable sheet. On the other hand, the water storage capacity of the water is insufficient, and the rainwater and the water to be sprayed fall in a short time to the water storage recess of the water storage drainage base plate, so that the water supply to the root of the plant in the planting blanket or the guest soil is insufficient.

In the water-storage and drainage base plate of the patent document 1, by making the whole surface of the back surface of the water-permeable sheet adhere to the water-storage and drainage base plate, it is possible to avoid insufficient moisture of the guest soil layer (or the planting blanket). However, as described above, it is difficult to form a space for supplying oxygen to the root portion between the guest soil layer (or the planting blanket, etc.) and the water storage and drainage base plate, and it is not suitable for the growth of the plant. Therefore, by using the water storage and drainage base plate of this form, it is impossible to obtain a solution that satisfies the above problems.

It is an object of the present invention to provide a suitable water storage drainage base plate for solving the aforementioned problems. Specifically, the first problem is to provide a water storage drainage base plate which is further improved, which is capable of securing a space for supplying oxygen to the roots of plants, and on the other hand, can be surely avoided in the guest soil layer (or Planting mats, etc.) may cause insufficient moisture. Further, the second object is to provide a green structure which can be greened on an artificial foundation by using the water storage and drainage base plate.

The water storage and drainage base plate of the present invention is provided with at least a water storage recess and a plurality of pillars, and a water storage drainage base plate disposed on the artificial foundation, wherein the water storage recess is partitioned by a peripheral wall functioning as a bank. The plurality of pillars are erected in the water storage recess; the plurality of pillars are composed of a plurality of first pillars and one and a plurality of second pillars, and the plurality of pillars have a top surface height The height of the top surface of the peripheral wall is the same or higher; and the height of the top surface of the one or more second pillars is lower than the height of the top surface of the peripheral wall.

Moreover, the green structure on the artificial foundation of the present invention has at least The following configuration is adopted: one or a plurality of water storage and drainage base plates of the present invention are disposed on the artificial foundation, and permeable to water is supported on the water storage and drainage base plate provided by the top surface of each of the pillars from below. A tablet is disposed on the water-permeable sheet.

In the water storage and drainage base plate of the present invention and the green structure on the artificial foundation using the water storage and drainage base plate, a water-permeable sheet such as a non-woven fabric is placed on the water storage and drainage base plate, and a heavy load is placed thereon. In the case of soil, the water permeable sheet is formed with a region on the back side supported by the top surface of the first pillar, and a back side in a region supported by the top surface of the second pillar. In the vicinity of the former region, a space, that is, an air layer, can be secured between the back surface of the water permeable sheet and the water surface of the water stored in the water storage recess. On the other hand, since the height of the second pillar in the vicinity of the latter region is lower than the height of the top surface of the peripheral wall which is a function of the bank, it is partially in a state of entering the water stored in the water storage recess. Therefore, the soil for planting (the guest soil or the planting blanket, etc.) on the water-permeable sheet in the region is directly supplied with the water stored in the water storage recess by capillary action. Moreover, the moisture also moves to other parts of the soil for planting by surface tension. As a result, the soil for planting can be sufficiently replenished, and it is not necessary to be affected by the physical properties of the soil for planting to ensure the required amount of water stored.

In the present invention, when the height of the top surface of the first pillar is higher than the top surface of the peripheral wall, the water surface of the water stored in the water storage recess can be more widely and surely secured. The space formed between them, that is, the air layer.

The top surface of the peripheral wall which functions as a dike may also be a non-flat surface, and it may form a notch part in a part. In the former case, the entire top surface becomes a flow surface, and the water surface of the water storage recess is limited by the height of the top surface. In the latter case, the bottom surface of the notch portion is flowed over the surface, and the water surface of the water storage recess portion is restricted by the height of the bottom surface of the notch portion. According to the amount of water flowing into the water storage and drainage base plate, even in the latter case, the entire top surface of the peripheral wall may flow over the surface.

When a water storage and drainage base plate having a shape in which a notch portion flows is formed in a part of the top surface of the peripheral wall, even if the height of the top surface of the first pillar is the same as the height of the top surface of the peripheral wall, the permeable sheet is By supporting the vicinity of the region on the back side by the top surface of the first pillar, it is possible to secure a required space, that is, an air layer. Further, in the case of the water storage and drainage base plate of this aspect, it is preferable that the height of the top surface of the second pillar is lower than the position of the bottom surface of the peripheral wall which is formed by a part of the top surface of the peripheral wall.

Further, the water storage and drainage base plate of the present invention may be formed by one water storage recess surrounded by the peripheral wall, or may be integrally formed by a plurality of water storage recesses surrounded by the peripheral wall.

In one aspect of the water storage and drainage base plate, part or all of the first pillars are erected along the peripheral wall, and the second pillars are erected on the inner side of the position where the first pillars are erected. In the recess for storing water. More preferably, the top surface of the first pillar is a slope that is inclined toward the second pillar.

In the water storage and drainage base plate of the above-described form, the back side of the water-permeable sheet to be placed can be slid from the peripheral wall portion toward the inner side (the second pillar side). Sloped surface. Therefore, it is possible to make the water stored on the planting soil side and the water in the planting soil more smooth in the water stored in the water storage recess. Moreover, as described in the above-mentioned Patent Document 3, it is also possible to prevent water from flowing down directly to the downstream side along the back surface of the water-permeable sheet and to improve water collection.

In one aspect of the water storage and drainage base plate, the top surface height is one or a plurality of third pillars between the top surface height of the first pillar and the top surface height of the second pillar. In this aspect, it is more preferable that the top surface of the third pillar is a slope that is inclined toward the second pillar. Since the water storage and drainage base plate of the above-described form can adjust the height of the water surface of the water-repellent sheet and the water surface of the water-storing recess in stages, it is possible to provide an appropriate gradient on the back surface of the water-permeable sheet, and it is possible to further effectively The water collecting effect to the water storage recess and the equal water suction effect.

In one form of the water storage and drainage base plate, a drainage groove for discharging water to be passed over the peripheral wall is formed on a top surface of a part or all of the peripheral wall. In a preferred aspect of the form, one or a plurality of drain holes penetrating through the back surface of the water storage and drainage base plate are formed in the drain. The water storage and drainage base plate of the above-described form is capable of smoothly guiding the water flowing over the water storage and drainage base plate to the back side of the water storage and drainage base plate. Therefore, in the green structure constructed using the water storage and drainage base plate of the above-described form, when there is a large amount of remaining water, such as when it is raining heavily, the remaining water can be quickly discharged to the back side of the water storage and drainage base plate. Thereby, soil loss for planting can be effectively prevented.

In one embodiment of the green structure of the present invention, a water-permeable sheet having rooting resistance is used as the water-permeable sheet. In addition, other forms of greening structure system lay a root-resistant piece on the artificial foundation, and above the root-resistant piece The aforementioned water storage drainage base plate is disposed on the surface. In the form of the greening structure system, the root of the planted plant reaches the water storage and drainage base plate beyond the water permeable sheet, and the root of the planted value can be prevented from reaching the artificial foundation.

In the present invention, the water-storage and drainage base plate is not limited, and from the viewpoints of lightness and heat insulation, it is preferable to use a resin molded article as a whole, particularly from the viewpoint of formability and strength. It is preferred to use a molded article of expanded polystyrene. However, when the artificial foundation to which the object is placed is not subjected to weight restrictions, it can be produced using non-foamed synthetic resin, metal, concrete, plaster, or the like.

In the present invention, the material of the water-permeable sheet is preferably a woven fabric, a non-woven fabric, a resin fiber web, a resin sheet having a plurality of pores, and a metal mesh, but it is preferably a non-woven fabric. . As described above, it is better to have a non-woven fabric which is resistant to roots or any means to make the roots of the plants pass.

The contents described in the specification and/or drawings of Japanese Patent Application No. 2011-127365, which is the priority of the present disclosure.

According to the present invention, it is possible to secure a space for supplying oxygen to the root of the plant, and at the same time, it is possible to surely avoid insufficient moisture which may occur in the soil layer for planting, and to obtain a further improved water storage and drainage base plate. Further, according to the green structure of the present invention, since oxygen is supplied to the root portion and appropriate water is supplied to the root portion of the planting soil, the cultivation of the plant is also good.

Hereinafter, the present invention will be described based on the embodiments. Fig. 1 and Fig. 2 show an embodiment of the water storage and drainage base plate of the present invention.

The water storage and drainage base plate A shown in Figs. 1 and 2 is an overall molded article of a foamed resin (e.g., expanded polystyrene), and has a side view of 10 to 200 cm and a thickness of about 1 to 10 cm. To form a substantially square plate. The basic structure of the water storage and drainage foundation plate A is provided with a peripheral wall 10 which functions as a dike; a water storage recess 20 which is partitioned by the peripheral wall 10; and a plurality of pillars 30 which are erected at This water storage recess 20 is inside. The peripheral wall 10 is composed of an outer peripheral wall 11 and an inner peripheral wall 12, wherein the outer peripheral wall 11 defines an outer edge of the water storage and drainage base plate A; and the inner peripheral wall 12 is orthogonal to each other and will be surrounded by the outer peripheral wall 11 The enclosed area is divided into a plurality of (illustrated as nine) segments. As a result, the water storage and drainage base plate A includes nine water storage recesses 20 which are partitioned into the substantially identical square by the outer peripheral wall 11 and the inner peripheral wall 12. The top surfaces of the peripheral wall 10 (the outer peripheral wall 11 and the inner peripheral wall 12) are flat surfaces and are all set to the same height.

In addition, a plurality of water storage and drainage base plates A may be formed by a plurality of water storage recessed portions 20, and one water storage and drainage base plate may be formed by one water storage recessed portion 20, and the water storage recessed portion 20 may be formed. It is only surrounded by the outer wall 11 which is defined by the outer edge. Further, each of the water storage recesses 20 may have a shape other than a square, and one of the water storage and drainage base plates may be formed by a plurality of water storage recesses 20 having different shapes.

In each of the water storage recesses 20, a plurality of pillars 30 are provided from the bottom surface. The pillar 30 is composed of a first pillar 31, a second pillar 32, and a third pillar 33, wherein the first pillar 31 is along the peripheral wall 10 (outer wall 11) And the inner wall 12) is erected, and the second pillar 32 is erected in a central portion of the water storage recess 20, and the third pillar is erected between the first pillar 31 and the second pillar 32. Area. In the water storage and drainage base plate A shown in the drawing, each of the water storage recesses 2 has 16 first pillars 31, eight third pillars 33, and one second pillar 32 standing vertically from the bottom surface.

As shown in the cross-sectional view of the bb line in Fig. 1(a), which is shown in Fig. 1(b), the top surface height of the first pillar 31 is higher than the height of the top surface of the peripheral wall 10, and the top of the second pillar 32 is The surface height is lower than the top surface height of the peripheral wall 10. Further, the height of the top surface of the third pillar 33 is set to be the height between the height of the top surface of the first pillar 31 and the height of the top surface of the second pillar 32. Further, in the illustrated example, the height of the top surface of the third pillar 33 is equal to the height of the top surface of the peripheral wall 10, but is not limited thereto. Further, in the present invention, the support 30 can basically achieve a desired object when a plurality of first pillars 31 and one or a plurality of second pillars 32 are provided, wherein the plurality of first pillars 31 are top surfaces. The height is the same as or higher than the height of the top surface of the peripheral wall 10, and the height of the top surface of the one or more second pillars 32 is lower than the height of the top surface of the peripheral wall 10, and the third pillar 33 can also be fully Omitted. The height of the top surface of the second pillar 32 is as described above, and is lower than the height of the top surface of the peripheral wall 10. As will be described later, according to the vegetation for the planting soil provided thereon, The amount of water may be appropriately set by suctioning the water stored in the water storage recess 20 .

In the peripheral wall 10, the width of the inner peripheral wall 12 is wider than that of the outer peripheral wall 11. Further, the center of the top surface of each inner peripheral wall 12 in the width direction is formed over the entire length of each inner peripheral wall 12 in the longitudinal direction to form a groove 13 for draining. Again, the The drain 13 also penetrates the outer peripheral wall 11 that intersects the inner peripheral wall 12. The protrusions 14 and 14 are provided on the outer sides of the two sides of the outer peripheral wall 11 , and the first segment 15 and the second segment 16 are formed on the upper surface of each of the protrusions 14 , wherein the first The segment portion 15 has the same width and depth as the drain groove 13, and the second segment portion 16 is outside the first segment portion 15 and lower than the first segment portion 15. A region 17 on the back side of the remaining two sides of the outer peripheral wall 11 is formed with a notch having a thickness equal to the thickness of the second segment portion 16 over the entire length.

The back surface of the water storage and drainage base plate A is formed with a desired number of legs 18 of equal height so as to avoid a position facing the peripheral wall 10 (the outer peripheral wall 11 and the inner peripheral wall 12). Further, an appropriate number of holes penetrating through the back surface are formed as the drain holes 19 in the first step portion 15 formed on the upper surface of each of the drain grooves 13 and the respective projecting portions 14.

Fig. 3 is a view showing a state in which a flexible water-permeable sheet B such as a non-woven fabric is placed on the above-described water-storage and drainage base plate A, and a state in which the cross-sectional position is shown in Fig. 1(b) is shown. When a load is applied to the entire surface of the upper surface of the water-permeable sheet B, the water-permeable sheet B is in a state in which the back surface side is supported by the top surface of the above-described pillar 30. In this example, the water-permeable sheet B supports the back side by three types of pillars having different heights, that is, the first pillar 31 having the highest height, the third pillar 33 having the middle height, and the second pillar 32 having the lowest height. Thereby, in each of the water storage recesses 20, the water-permeable sheet B is supported at the highest position along the region of the peripheral wall 10, and the support position is gradually lowered toward the center and supported by the second pillar 32. The area near the area becomes the lowest position. More specifically, in each of the water storage recesses 20, water permeability The sheet B is supported at the highest position in the area around the peripheral wall 10, and is supported at the lowest position at the center position.

Next, the green structure C on the artificial ground formed using an appropriate number of the above-described water storage and drainage base plates A will be described with reference to Fig. 4 . In the example shown in Fig. 4, the green structure C is formed on the roof building skeleton D having a slight inclination angle as an example of the artificial foundation. First of all, it is better to be covered on the roof building skeleton D, which is covered with a root-resistant sheet (mainly polyethylene sheet, vinyl chloride sheet, foamed polyethylene sheet, etc.) for protecting the roof waterproof layer from the root of the plant. E. At this time, the overlapping portion of the root-resistant sheet ensures a sufficient overlap distance, or is fixed by an adhesive tape or the like. The root-resistant sheet is fixed to the roof building skeleton D using an adhesive or an anchor.

On the upper surface, a plurality of sheets of the water storage and drainage base plate A are disposed in the longitudinal and lateral directions. The surrounding material is surrounded by the edge material F to surround the disposed water storage drainage base plate group A, and the respective edge materials F are fixed to the roof building skeleton D by appropriate means, and the water storage drainage base plate group A is stabilized. . Further, as described above, each of the water storage and drainage base plates A has the protruding portion 14 having the above-described configuration, and the second segment portion 16 is inserted below the notched region 17 of the adjacent water storage and drainage base plate A. In the arrangement, the drain groove 13 of the first stage portion 15 is formed at the joint portion of the water storage and drainage base plates A and A that are adjacently joined.

Above the disposed water storage and drainage base plate group A, a water permeable sheet B such as a non-woven fabric is spread. It is preferred to use a water permeable sheet having anti-root properties. Then, the soil for planting (the soil layer or the vegetation) is placed on the water-permeable sheet B. Carpets, etc.) G and plant H is planted by soil G for planting. It is preferable to lay a water-permeable sheet (polyester long-fiber nonwoven fabric or the like) (not shown) for preventing soil outflow on the soil G for planting and to fix it to each of the water storage and drainage base plates A.

In vegetative, water is planted from the soil G for vegetative use. In addition, water is supplied from a water supply pipe or the like installed in the upper position. Among the water that is watered or supplied, the water that has not been absorbed by the planting soil G is dropped into the water storage recess 20 of the water storage and drainage base plate A by the planting soil G, and the water W is stored in the water storage recess 20 . In general, the roof structure D of the artificial foundation is slightly inclined, and when the amount of water stored in the water storage recess 20 is increased, the peripheral wall 10 (the outer wall 11 and the inner wall 12) functioning as a dike flows. Flow out to the downstream side of the slope. In addition, it also flows in the horizontal direction. The water flowing through enters each of the drain grooves 13 formed on the top surface of the peripheral wall 10 (outer peripheral wall 11 and inner peripheral wall 12), and is then quickly discharged to the back side of the water storage and drainage base plate A through the drain hole 19. . The discharged water is drained to the outside of the roof building skeleton D through the space formed between the feet 18 on the back surface of each of the water storage and drainage base plates A.

As described above, by using the water storage and drainage base plate A of the present invention, the water permeable sheet B is attached to each of the water storage recesses 20, and is surrounded by the peripheral wall 10 (the outer peripheral wall 11 and the inner peripheral wall 12). The support is at the highest position and is supported at the lowest position at the central position. Further, the aforementioned highest position is higher than the top surface of the peripheral wall 10 (outer peripheral wall 11 and inner peripheral wall 12) which functions as a dike, and the lowest position is lower than the top surface of the peripheral wall 10. Therefore, even if the water storage W of each of the water storage recesses 20 is full or flows beyond the top surface of the peripheral wall 10 The space between the water surface and the back surface of the water-permeable sheet B is formed as a space. Further, as described above, since the lowest position of the water-permeable sheet B is often located lower than the top surface of the peripheral wall 10, in its region, the water-permeable sheet B and the soil G for planting are placed in contact with the storage. The state of the water. Therefore, the water W stored in the water storage recess 20 is directly sucked by the planting soil G by the capillary phenomenon. Further, the moisture is gradually moved to other parts of the soil G for planting by the surface tension. As a result, sufficient soil moisture can be supplied to the planting soil G without being affected by the physical properties of the planting soil G, and the required water retention amount can be secured. Therefore, the green structure C of the present invention can satisfactorily supply oxygen to the root and appropriate water supply to the root of the planting soil G, and can maintain an optimum environment for cultivating plants for a long period of time.

Further, as shown in the figure, by forming a concave curved surface as a whole, the lowest portion of the water-permeable sheet B is positioned at the central portion of the water storage recess 20, and the remaining water from the planting soil G can be surely dropped into the water storage. The recess 20 is used. In particular, when the third pillar 33 is provided as described above, the concave curved surface of the entire back surface of the water-permeable sheet B can be made smooth, and the curved surface shape can be adjusted to be optimum by adjusting the height of the third pillar 33. shape.

Fig. 5 is a view showing another form of the water storage and drainage base plate of the present invention. In the water storage and drainage base plate A1, only the top surfaces of the first pillars 31 and the third pillars 33 are directed toward the inclined surfaces 31a and 33a of the second pillars 32, and are different from the water storage and drainage base panel A shown in Fig. 1 . The other components are the same as those of the water storage and drainage base plate A, and the same reference numerals are attached thereto, and the description thereof is omitted. The water storage and drainage base plate A1 is capable of arranging the back side of the permeable sheet B from the circumference The wall portion 10 faces the inner side (the second pillar 32 side), and becomes a smoother inclined surface. Therefore, it is possible to more smoothly absorb the water absorption on the planting soil G side and the moisture in the planting soil in the water W stored in the water storage recess 20, and it is possible to more reliably prevent the water from flowing along the water-permeable sheet B. The back side flows directly to the downstream side, and the water collection to the water storage recess 20 is further improved.

Fig. 6 is a view showing a part of another form of the water storage drainage base plate of the present invention. The water storage and drainage base plate A2 is different from the above-described water storage and drainage base plates A and A1 in that a part of the peripheral wall 10 (the outer peripheral wall 11 and the inner peripheral wall 12) is formed with the flow gap portion 40. Further, the height of the top surface of the second pillar 32 is set to be lower than the bottom surface of the cutout portion 40. The height of the top surface of the first pillar 31 and the third pillar 33 is set to be equal to or higher than the height of the top surface of the peripheral wall 10, and may be any. In the illustrated example, the heights of the top surfaces of the first pillars 31 and the third pillars 33 are set to be the same height as the height of the top surface of the peripheral wall 10.

When the water storage and drainage base plate A2 is used, the water stored in the water storage recess 20 flows from the bottom surface portion of the flow-through notch portion 40. That is, the height of the water surface of the stored water in the flow-through notch portion 40 depends on the height of the bottom surface of the flow-through notch portion 40. However, in the water storage and drainage base plate A2, since the top surface height of the second pillar 32 is set to be lower than the bottom surface of the notch portion 40, the green structure using the water storage drainage base plate A2 is also used. It is possible to simultaneously satisfy the oxygen supply to the root and the appropriate water supply to the roots in the soil G for planting.

All publications, patents, and patent applications cited in this specification are hereby incorporated by reference in their entirety herein

10‧‧‧ week wall

11‧‧‧Outer wall

12‧‧‧ inner perimeter wall

13‧‧‧Drainage

14‧‧‧Protruding

15‧‧‧1

16‧‧‧Section 2

17‧‧‧ areas with gaps

18‧‧‧ feet

19‧‧‧Drainage holes

20‧‧‧Water storage recess

30‧‧‧ pillar

31‧‧‧1st pillar

32‧‧‧Second pillar

33‧‧‧3rd pillar

40‧‧‧Gap section

A, A1, A2‧‧‧ water storage drainage plate

B‧‧‧Water-permeable sheet

C‧‧‧Green structures on artificial foundations

D‧‧‧ as the roof of the artificial foundation

E‧‧‧Negan tablets

F‧‧‧Margin

G‧‧‧Study soil for planting (customer soil or planting blanket, etc.)

H‧‧‧Phytic plants

W‧‧‧Storage water

Fig. 1 is a perspective view (a) showing an embodiment of the water storage and drainage base plate of the present invention, a sectional view (b) of the bb line of Fig. 1 (3), and a first sectional view (b) of Fig. 1 (a). Section cc of the cc line (c).

Fig. 2 is a perspective view showing the water storage drainage base plate viewed from the back side.

Fig. 3 is a cross-sectional view showing a state in which a water permeable sheet is placed on the water storage and drainage base plate shown in Fig. 1.

Fig. 4 is a cross-sectional view showing a state in which the water storage and drainage base plate shown in Fig. 1 is placed on an artificial foundation as a green structure.

Fig. 5 is a view corresponding to Fig. 1(b) for explaining another embodiment of the water storage and drainage base plate of the present invention.

Fig. 6 is a partial view for explaining another form of the water storage and drainage base plate of the present invention.

10‧‧‧ week wall

11‧‧‧Outer wall

12‧‧‧ inner perimeter wall

13‧‧‧Drainage

14‧‧‧Protruding

17‧‧‧ areas with gaps

18‧‧‧ feet

20‧‧‧Water storage recess

30‧‧‧ pillar

31‧‧‧1st pillar

32‧‧‧Second pillar

33‧‧‧3rd pillar

A‧‧‧Water storage drainage plate

B‧‧‧Water-permeable sheet

C‧‧‧Green structures on artificial foundations

D‧‧‧ as the roof of the artificial foundation

E‧‧‧Negan tablets

F‧‧‧Margin

G‧‧‧Study soil for planting (customer soil or planting blanket, etc.)

H‧‧‧Phytic plants

W‧‧‧Storage water

Claims (10)

The water storage and drainage foundation plate is a water storage drainage base plate disposed on the artificial foundation with at least a water storage recess and a plurality of pillars, wherein the water storage recess is separated by a peripheral wall functioning as a dike; and the plural The root pillar is erected in the water storage recess; the plurality of pillars are composed of a plurality of first pillars and one or a plurality of second pillars, and the plurality of pillars have a top surface height and the aforementioned peripheral wall The top surface height is the same or higher; and the height of the top surface of the one or more second pillars is lower than the height of the top surface of the aforementioned peripheral wall. The water storage and drainage foundation plate according to claim 1, wherein part or all of the first pillars are erected along the peripheral wall, and the second pillar is erected than the first The position where the pillar is erected is located inside the recess for water storage. The water storage and drainage base plate according to claim 1 or 2, wherein the top surface of the first pillar is a slope inclined toward the second pillar. The water storage and drainage base plate according to any one of claims 1 to 3, wherein the top surface height is one between the height of the top surface of the first pillar and the height of the top surface of the second pillar or The third pillar of the plural. The water storage and drainage base plate according to Item 4, wherein the top surface of the third pillar is a slope inclined toward the second pillar. The water-storage drainage base plate according to any one of claims 1 to 5, wherein a part or all of the top surface of the peripheral wall is formed There is a drain to drain the water that is intended to pass over the perimeter wall. The water storage and drainage base plate according to claim 6, wherein the drainage groove is formed with one or a plurality of drainage holes penetrating through the back surface of the water storage and drainage base plate. A greening structure on an artificial foundation having at least one of the following structures: one or a plurality of water storage drainage base plates according to any one of claims 1 to 7 of the patent application, and On the disposed water storage and drainage base plate, a water permeable sheet is attached in a state of being supported from below by the top surface of each of the pillars, and planting soil is disposed on the water permeable sheet. The green structure according to claim 8, wherein a water-permeable sheet having rooting resistance is used as the water-permeable sheet. The green structure according to claim 8 or 9, wherein the root-resistant sheet is laid on the artificial foundation, and the water storage and drainage base plate is provided on the upper surface.