JP5106799B2 - Green shade greening structure and green shade greening method - Google Patents

Description

  The present invention relates to a green shade structure that provides green shade by being constructed on an artificial ground, and a green shade greening method.

  Since concrete surfaces such as artificial ground, rooftops, and pedestrian bridges reflect direct sunlight, walking in the hot summer is particularly difficult. Therefore, greening the artificial ground and rooftops prevents direct sunlight and reduces the heat island phenomenon that has become a problem in urban areas in recent years.

  In particular, if a tree that provides green shade is used for greening, direct sunlight is blocked, so that it is protected from heat stroke and the like. Moreover, the discomfort that solar radiation gives to the human body is reduced by the transpiration from the pores behind the leaves of the tree.

  Such a tree providing green shade is a large tree (Takagi) that has a large root on the ground. However, if a thick soil layer for growing large trees on the rooftop or the like is provided, the limit on the load acting on the building will be exceeded.

  Therefore, spread the soil for planting on the foundation structure for planting to form a thin planting base, and place a root pot of a tree plant on this so that it will not fall over Fixing a tree-based plant to a thin planting base body makes it possible to make a green shade using a large tree on a rooftop or the like while solving the problem of building load (see Patent Document 1).

  Generally, the root growth range of a tree plant is proportional to the projected area of the crown. For this reason, in order to obtain the minimum necessary shade, it is necessary to grow the roots of the tree-based plant in a region corresponding to the projected area of the crown.

However, in patent document 1, since the root pot of a tree-type plant is only mounted on the soil for planting, the water | moisture content in the soil for planting will evaporate. For this reason, even if the roots of the tree-based plant extend into the planting soil, the roots wither because the planting soil is dry. That is, since the roots of tree-based plants do not grow, the tree-based plants do not grow into large trees that provide green shade.
JP-A-2005-185109

  In view of the above facts, an object of the present invention is to grow tree roots in an area corresponding to the projected area of a tree crown on an artificial ground with a load limit and to provide green shade by the tree.

The green shade structure of the invention of the first aspect is provided with a planting part provided on an artificial ground and planted with a root pot of a tree, and provided around the planting part, and the root of the tree is thinner than the planting part. A soil layer that is provided between the ground layer and the artificial ground, and a heat insulating layer that is provided above the ground layer and prevents evaporation of moisture in the ground layer. And a drainage layer.

According to the invention of the first aspect, the planting part where the root pot of the tree is planted is provided on the artificial ground, and the soil layer where the root of the tree is stretched is provided around the planting part. . This allows the tree roots to grow over a wide area so that the tree crown grows large enough to provide green shade.

  Moreover, the heat insulation layer provided at the upper part of the soil layer prevents the evaporation of water in the soil layer, and the excess water in the soil layer is drained by the drainage layer provided at the lower part of the soil layer. The In this way, by sandwiching the upper and lower parts of the soil layer between the heat insulation layer and the drainage layer, respectively, the customer soil layer is not directly exposed to sunlight, and at the same time, the customer soil layer does not directly contact the artificial ground, Heat is less likely to enter the soil layer, and drying of the soil layer is prevented. In other words, moisture necessary for the growth of tree roots is secured in the soil layer.

  Moreover, since the excess water of the customer soil layer flows to the ground through the drainage layer, the moisture requirement in the customer soil layer is appropriately maintained, and the root rot of the tree is not caused.

The green shade structure of the invention of the second aspect is characterized in that a drainage layer is provided between the artificial ground and the planting part.

According to the invention of the second aspect , the drainage layer is provided between the artificial ground and the planting part. Thereby, it becomes difficult for the heat of the artificial ground to invade the root pot of the tree planted in the planting part, and drying of the root pot is prevented.

The green and shade greening structure of the invention of the third aspect is characterized in that a water retaining part for retaining water is formed in the drainage layer.

According to the invention of the third aspect , the drainage layer is provided with the water retention part, and the water is retained by the water retention part. As a result, surplus water in the soil layer is retained in the water retention unit, and the moisture retained in the water retention unit is supplied to the soil layer as needed (for example, when to dry). No irrigation is required.

The green and shade greening structure of the invention of the fourth aspect is characterized in that the heat insulating layer is provided with water passage holes through which water passes through the customer soil layer.

According to the fourth aspect of the invention, the heat insulating layer is provided with water passage holes, and water from rain or irrigation is supplied to the soil layer through the water passage holes.

The green and shade greening structure of the fifth aspect of the invention is characterized in that a support member that supports the heat insulating layer and keeps the thickness of the customer soil layer constant is embedded in the customer soil layer.

According to the fifth aspect of the invention, the thickness of the soil layer is kept constant by embedding the support member that supports the heat insulating layer in the soil layer. As a result, even if a person gets on the heat insulation layer, for example, even if a force is applied from above the heat insulation layer, the customer soil layer will not be consolidated and thinned. No fear of damaging tree roots. Moreover, the thickness of the soil layer does not change partially and unevenness does not occur.

The green-greening structure according to the sixth aspect of the invention is characterized in that the support member is formed with a plurality of openings through which the roots of the tree are entangled.

According to the sixth aspect of the invention, a plurality of openings are formed in the support member, and the roots of the trees stretched on the soil layer are entangled with the openings. Thereby, even if a tree receives a strong wind, since a root does not lift, the fall of a tree can be prevented.

The green and shade greening structure of the seventh aspect of the invention is characterized in that a sheet material that prevents the outflow of the customer soil is provided between the customer soil layer and the drainage layer.

According to the seventh aspect of the invention, by providing the sheet material between the soil layer and the drainage layer, outflow of the soil is prevented. Moreover, since the root of the tree is prevented from entering the drainage layer, the artificial ground is not damaged by the root of the tree.

The green and shade greening structure of the eighth aspect of the invention is characterized in that a walking board is laid on the heat insulation layer.

According to the eighth aspect of the invention, by laying the walking board on the upper part of the heat insulating layer, the upper part of the heat insulating layer is stabilized and it becomes easy to walk. Further, when walking on a walking board, the roots of the trees are less likely to receive treading pressure, so that the roots of the trees can grow sufficiently.

The green shade greening structure of the invention of the ninth aspect is characterized in that the walking board is made of water permeable concrete.

According to the ninth aspect of the invention, since the walking board is made of water-permeable concrete, rainwater permeates the walking board and penetrates into the soil layer, so that the water cannot be accumulated on the walking board.

The green and shade greening structure of the invention of the tenth aspect is characterized in that irrigation means for sending water to a water passage hole formed in the heat insulating layer is provided at the joint of the walking board.

According to the tenth aspect of the invention, the irrigation means is provided at the joint of the walking board, and water is sent from the irrigation means to the hole formed in the heat insulating layer. Thereby, since water is supplied to the customer soil layer provided under the heat insulation layer, it is not necessary to irrigate from the outside in a period of low rainfall.

The green shade planting method of the invention of the eleventh aspect includes the first step of providing a drainage layer having a drainage function on the artificial ground, and the planting part for planting a root pot of a tree on the drainage layer, A second step of providing a soil layer in which the roots of the trees are stretched around the planting part; and a third fixing for providing a heat insulating layer on the soil layer to prevent evaporation of moisture in the soil layer; And a fourth step of planting a root pot of the tree in the planting part.

According to the eleventh aspect of the present invention, a drainage layer having a drainage function is provided on the artificial ground, and on this drainage layer, a soil layer in which the roots of the trees are stretched while leaving a planting part for planting a root pot of the tree. Is provided around the planting part. And the heat insulation layer which can permeate | transmit water and prevents evaporation of the water | moisture content in a customer soil layer is provided on a customer soil layer. As described above, since the constituent members are sequentially provided on the artificial ground, the work is not complicated.

Green area greening method of the invention of the twelfth aspect, prior to the second step, a step of installing the supporting member supports the heat insulating layer for holding the thickness of the soil dressing layer constant over the drainage layer It is characterized by having.

According to the invention of the twelfth aspect, before the second step, a support member for supporting the heat insulating layer, by providing on the drainage layer, it can be prevented consolidation of soil dressing layer.

Green area greening method of the invention of the thirteenth aspect, after the first step is characterized by including a step of laying the sheet material to prevent the outflow of soil dressing on the drainage layer.

According to the thirteenth aspect, after the first step, laying a sheet member on top of the drainage layer, providing a soil dressing layer thereon. This makes it difficult for the soil to flow out.

The green shade planting method of the invention of the fourteenth aspect is characterized by having a step of laying a walking board above the heat insulating layer.

According to the fourteenth aspect of the present invention, it becomes easy to walk by laying the walking board on the heat insulating layer.

The green shade planting method according to the fifteenth aspect of the invention is characterized in that irrigation means that is formed in the heat insulating layer and sends water to the water passage hole is provided at the joint of the walking board.

According to the invention of the fifteenth aspect , by providing the irrigation means at the joint of the walking board, water is supplied from the irrigation means to the customer soil layer provided under the heat insulating layer. There is no need to irrigate from the outside.

  Since the present invention is configured as described above, the root of the tree grows in an area corresponding to the projected area of the canopy on the artificial ground having a load limit, and the shade from the tree is provided.

  Next, the green and shade greening structure 10 according to the embodiment of the present invention will be described.

  As shown in FIG. 1 and FIG. 8, the green and shade greening structure 10 is composed of a water retention / drainage plate 18, a soil layer 38, and a heat insulation plate 40 constructed on the artificial ground 12, and the rooting layer 14. It is comprised with the tree 16 planted by the planting part 17 provided in the layer 14. FIG.

  As shown in FIG. 2, the neat layer 14 has a water retention / drainage plate 18 made of an epoxy resin installed on the artificial ground 12. The water retention and drainage plate 18 is rectangular, and a plurality of rectangular recesses 20 are formed on the surface at predetermined intervals. In this recess 20, excess water that has permeated into the soil 36 (see FIG. 5) of the soil layer 38 described later is stored. And the water stored in the recessed part 20 is supplied to the customer land 36 as needed (when the customer soil 36 dries).

  In addition, through holes 22 are formed in the water retention / drainage plate 18 at predetermined intervals, and water that cannot be stored in the recesses 20 flows to the artificial ground 12 through the through holes 22. Thereby, since water is not stored more than necessary on the water retention / drainage plate 18 (in the recess 20), the amount of water in the customer soil 36 does not increase to cause root rot.

  Grooves 24 are formed in a grid pattern on the back surface of the water retention / drainage plate 18 at predetermined intervals. Thus, when the water retention / drainage plate 18 is placed on the artificial ground 12, a gap is formed between the artificial ground 12 and the water retention / drainage plate 18, and the water that has flowed into the artificial ground 12 from the through hole 22 passes through this gap. It passes through the artificial ground 12 and flows into a drain (not shown).

  In addition, in this embodiment, in order to improve the adhesiveness with the root-resistant sheet | seat 26 mentioned later, it demonstrated by the structure which uses the water retention drainage plate 18 which consists of an epoxy resin, However, The material of the water retention drainage plate 18 is not necessarily an epoxy resin. It is not limited, and EPS (foamed styrene) or the like may be used.

  Moreover, in this embodiment, although the water retention drainage plate 18 was formed with the epoxy resin which does not have water permeability, you may use the water retention drainage layer comprised by the water retention layer and the drainage layer.

  Furthermore, although the lattice-shaped grooves 24 are formed on the back surface of the water retention / drainage plate 18, the grooves provided on the back surface of the water retention / drainage plate 18 do not necessarily have a lattice shape. If the water that has flowed onto the artificial ground 12 through the through hole 22 can flow on the artificial ground 12 without being blocked between the groove and the artificial ground 12, the shape of the groove Is not limited.

  A root-resistant sheet 26 is laid on the water retention / drainage plate 18. The root-resistant sheet 26 is adhered to the water retention / drainage plate 18 with an adhesive, and the root-resistant sheet 26 prevents the outflow of the customer soil 36 of the customer soil layer 38 to be described later. Further, by providing the root-resistant sheet 26, the customer soil 36 enters the through hole 22, the through hole 22 is clogged, or the customer soil 36 enters the recess 20, thereby impairing the water storage function of the recess 20. To prevent. Furthermore, the root-resistant sheet 26 prevents the roots of the trees 16 from entering the water retention / drainage plate 18 installed under the root-resistant sheets 26, so that the artificial ground 12 is damaged by the roots of the trees 16. There is no. Note that the root-resistant sheet 26 has water permeability, and excess moisture in the soil 36 passes through the root-resistant sheet 26 and flows into the lower water retention drainage plate 18.

  On the root-resistant sheet 26, a customer soil layer 38 is provided. The customer soil layer 38 includes a vinyl chloride pallet 28 and customer soil 36 (see FIG. 5) spread between the pallets 28. In FIG. 2, the customer land 36 is omitted.

  The pallet 28 includes a rectangular bottom plate 30, column portions 32 erected from five corners and the center of the bottom plate 30, and a long plate-shaped connection plate 34 that connects the upper ends of the column portions 32. ing. A plurality of openings 30A and 34A are formed in the bottom plate 30 and the connecting plate 34, respectively, to reduce the weight of the entire pallet 28, and the root of the tree 16 (see FIG. 8) is entangled with the pallet 28. It has become easy.

  As the soil soil 36 (see FIG. 5) spread between the pallets 28, artificial soil in which organic soil and inorganic soil are mixed, or artificial soil such as pearlite perlite is used. Thereby, the water retention of the soil layer 38 is ensured and the weight can be reduced. Moreover, since the land 36 is not reduced by rainfall or irrigation over a long period of time, there is no need for maintenance.

  A heat insulating plate 40 made of an epoxy resin is provided on the customer soil layer 38. As a result, the customer soil layer 38 is sandwiched between the water retention / drainage plate 18 and the heat insulating plate 40 described above, so that the heat in the customer soil layer 38 is less likely to be dissipated, and the customer soil layer 38 has a tree 16. At a temperature suitable for root growth.

  Four quadrangular pyramid-shaped concave portions 42 are formed on the upper surface of the heat insulating plate 40. A water passage hole 44 is formed at the center of the concave portion 42, and water irrigated from a water hose 52 described later gathers in the vicinity of the water passage hole 44 along the inclined surface of the concave portion 42 and passes through the water passage hole 44. It flows into the customer soil layer 38.

  In the present embodiment, the structure using the heat insulating plate 40 made of epoxy resin has been described. However, the material forming the heat insulating plate 40 is an epoxy resin as long as it is difficult to dissipate the heat in the customer soil layer 38. For example, EPS (foamed styrene) may be used.

  In addition, although four quadrangular pyramid-shaped recesses 20 are formed on the upper surface of the heat insulating plate 40, a water passage hole 44 is formed in correspondence with the irrigation hole 51 of the irrigation hose 52. If it is a recessed part which has the inclination for guide | inducing water to 44, the shape and number of a recessed part are not limited to the said form.

  On the heat insulating plate 40, a water permeable concrete 46 is provided. A sealing material 48 is applied to the lower surface of the water permeable concrete 46, and is in close contact with the outer peripheral edge of the heat insulating plate 40 to prevent the customer soil 36 located under the water permeable concrete 46 from being dried.

  Moreover, the semicircular recessed part 50 is formed in the end surface of the water-permeable concrete 46, and when the water-permeable concrete 46 is arranged in parallel, the irrigation hose 52 is inserted in the recessed part 50. As a result, the irrigation hose 52 is held between the permeable concrete 46.

  The irrigation hose 52 has an irrigation hole 51, and the irrigation hose 52 is arranged such that the irrigation hole 51 faces the water passage hole 44 of the heat insulating plate 40. As a result, the water irrigated from the irrigation hose 52 flows along the inclined surface of the recess 42 of the heat insulating plate 40 and flows into the soil layer 38 below the heat insulating plate 40 from the water passage hole 44.

  A water supply device (not shown) for supplying water to the irrigation hose 52 starts water supply when the amount of water in the soil 36 detected by the moisture sensor installed in the soil 36 is below a predetermined value, Water is irrigated from the irrigation hose 52 to keep the moisture of the soil 36 at a desired value.

For example, when the soil layer 38 is formed using a pearlite pearlite having a void of 82% and an effective moisture of 20% so as to have a thickness of 5 cm, the effective soil layer has an effective moisture of 10 liter / m ^2. It becomes. Therefore, in the summer, water is irrigated from the irrigation hose 52 so as to satisfy the moisture requirement of the tree 16 (see FIG. 8). In the case of a tree 16 made of a high tree such as zelkova, it requires 11 liters / m ² of water per day at a temperature of 30 ° C., so it does not dry beyond the water tension pf 3.2 at the initial wilting point of the tree 16 As described above, irrigation from the irrigation hose 52 is managed by the moisture sensor.

  In this way, by managing the irrigation from the irrigation hose 52 according to the amount of water in the soil 36 according to the season and the type of the tree 16, the soil 36 is dried when there is rainfall over a long period of time. Irrigation is not performed when it is not necessary to absorb water to the land 36, such as in difficult high humidity seasons, leading to water saving. In addition, since the water content in the soil 36 is always maintained, there is no risk of causing root decay or withering of the tree 16.

  In the present embodiment, the irrigation amount is controlled by receiving a signal from a moisture sensor provided in the customer soil 36. However, regardless of the moisture amount in the customer soil 36, the irrigation hose is provided at predetermined intervals by timer control. Irrigation may be performed from 52.

  Next, a green shade greening method for forming the green shade greening structure 10 having the above configuration on the artificial ground will be described.

  As shown in FIG. 3, first, a plurality of water retention and drainage plates 18 are laid on the artificial ground 12. As shown in FIG. 2, the water retention / drainage plate 18 has a rectangular shape, and a plurality of the water retention / drainage plates 18 are spread in an area where construction is necessary.

  Then, as shown in FIG. 4, the root-resistant sheet 26 is stuck on the water retention / drainage plate 18 with an adhesive. At this time, one root-resistant sheet 26 is stuck so as to straddle the plurality of water retention / drainage plates 18. A plurality of root-resistant sheets 26 cut to substantially the same size as the water retention / drainage plate 18 may be aligned and pasted.

  Next, as shown in FIG. 5, a plurality of pallets 28 are laid on the root-resistant sheet 26, and the customer soil 36 is introduced to form a customer soil layer 38. At this time, a space is provided in which a root pot of the tree 16 to be planted in a later step can be inserted (in the drawing, this space is provided at the right end).

  Next, as shown in FIG. 6, the heat insulating plate 40 is disposed on the soil layer 38. Then, as shown in FIG. 7, the water-permeable concrete 46 is laid while sandwiching the irrigation hose 52. At this time, it arrange | positions so that the edge part of the water-permeable concrete 46 may be located on the water flow hole 44 of the heat insulation plate 40. FIG. Accordingly, the irrigation hose 52 is disposed above the water passage hole 44.

  And the wall board 54 is attached to the wall surface of the heat insulation plate 40 exposed to the planting part 17 side and the water-permeable concrete 46, as shown in FIG. In the vicinity of the end portion of the surface of the wall plate 54, a convex portion 54 </ b> A protrudes, and this convex portion 54 </ b> A is fixed to a concave portion 46 </ b> A formed at the end portion of the bottom surface of the water-permeable concrete 46. Thereby, the wall board 54 is pinched | interposed between the water-permeable concrete 46 and the heat insulation plate 40, and the planting part 17 surrounding the root pot 16A of the tree 16 is formed.

  Then, the soil is put into the planting part 17 and a root pot 16A of the tree 16 is embedded. As the tree 16, a tree that can provide green shade, such as zelkova, plane tree, sendan, and pinewood, is used.

  Next, the effect | action of the green shade greening structure 10 which concerns on embodiment of this invention is demonstrated.

  On the artificial ground 12, a rooting layer 14 composed of a water retention / drainage plate 18, a guest soil layer 38 and a heat insulating plate 40, which is thinner than the root pot 16 </ b> A of the tree 16, is provided, and planted in the rooting layer 14. A portion 17 is provided, and a root pot 16 </ b> A of the tree 16 is planted in the planting portion 17.

  The root extending from the root pot 16A of the tree 16 is allowed to invade the soil layer 38 of the Nebari layer 14, and the root of the tree 16 grows over a wide area, so that the crown of the tree 16 provides shade. To grow large enough.

  Moreover, the heat insulation plate 40 is provided in the upper part of the customer soil layer 38 which comprises the Nebari layer 14, and direct sunlight does not hit the customer soil 36. FIG. Further, a water retention / drainage plate 18 is provided below the customer soil layer 38 so that the customer soil 36 does not directly contact the artificial ground 12. In other words, the customer soil 36 is sandwiched between the heat insulating plate 40 and the water retention / drainage plate 18 and is maintained so that the internal temperature change does not increase, and is difficult to dry. For this reason, the inside of the soil layer 38 becomes an environment suitable for the growth of the roots of the trees 16.

  Further, by providing the pallet 28 in the customer soil layer 38, a person walks on the Nebari layer 14 or sits on a bench 56 placed on the Nebari layer 14 to exert force from above. Even if applied, the soil layer 38 is not consolidated and thinned, so that the root of the tree 16 is not damaged. Moreover, the thickness of the customer soil layer 38 is partially changed, so that unevenness is not generated.

  In addition, by providing the water-permeable concrete 46 on the pallet 28, the upper part of the root tension layer 14 is stabilized and it becomes easy to walk. In addition, when walking on the permeable concrete 46, the roots of the trees 16 are less likely to receive the treading pressure, so that the roots can grow sufficiently.

  Furthermore, if the root of the tree 16 spreads in the soil layer 38 over a wide area and is entangled with the pallet 28, even if the tree 16 receives a strong wind, the root is difficult to lift and the tree 16 does not collapse.

  In the present embodiment, the pallet 28 is provided as a support member that keeps the thickness of the soil layer 38 constant. However, as shown in FIG. May be used that is fastened with a screw 60. At this time, if a plurality of holes 58A are formed in the C channel 58, the roots of the trees 16 (see FIG. 8) are entangled with the holes 58A.

It is a side view of the green shade greening structure concerning this embodiment. It is a disassembled perspective view of the green shade greening structure which concerns on this embodiment. It is side surface sectional drawing which shows the 1st process of the green shade greening construction method which concerns on this embodiment. It is side surface sectional drawing which shows the 2nd process of the green shade greening construction method which concerns on this embodiment. It is side surface sectional drawing which shows the 2nd process of the green shade greening construction method which concerns on this embodiment. It is side surface sectional drawing which shows the 3rd process of the green shade greening construction method which concerns on this embodiment. It is side surface sectional drawing which shows the 4th process of the green shade greening method which concerns on this embodiment. It is side surface sectional drawing which shows the 5th process of the green shade greening method which concerns on this embodiment. It is a fragmentary perspective view of the support member in other forms.

Explanation of symbols

10 Green shade greening structure 12 Artificial ground 14 Nebari layer 16 Tree 16A Root pot 18 Water retention drainage plate (drainage layer)
20 Concave part (water retention part)
26 Root resistant sheet (sheet material)
28 pallets (customer soil layer, support member)
36 Customer Land (Customer Land Group)
38 Customer soil layer 40 Thermal insulation plate 44 Water passage hole 46 Water permeable concrete 52 Watering hose (watering means)
58 channels (customer soil layer, support member)
62 Planting Department

Claims (8)

A planting part on the artificial ground where the root pots of trees are planted,
Provided around the planting part, and a soil layer where the roots of the trees stretch in a thin layer from the planting part,
A heat insulating plate provided on an upper surface of the soil layer, and preventing evaporation of moisture in the soil layer;
The soil dressing layer and the suppressing heat radiation Rutotomoni heat of the該客soil layer sandwich insulation plate and the soil dressing layer is provided between the artificial ground, and water retention drainage plate having a draining function,
A green shade greening structure characterized by comprising: The water retention drainage plate is formed with a water retention part that retains water, and the heat insulation plate is provided with a water passage hole that allows water to pass through the guest soil layer. Green shade greening structure. A support member that supports the heat insulating plate and keeps the thickness of the customer soil layer constant is embedded in the customer soil layer, and the support member has a plurality of openings through which the tree roots are entangled. The green shade greening structure of Claim 1 or 2 characterized by these. The green and shade greening structure according to any one of claims 1 to 3, wherein a sheet material that prevents outflow of the soil is provided between the soil layer and the water retention drainage plate. . On the upper part of the heat insulating plate , a walking board is laid, the walking board is made of permeable concrete, and irrigation means for sending water to a water passage hole formed in the heat insulating plate at the joint of the walking board The green and shade greening structure according to any one of claims 1 to 4, wherein: A first step of providing a water retention and drainage plate having a drainage function on the artificial ground;
Leaving a planting part for planting a root pot of a tree on the water retention drainage plate , and providing a soil layer on which a tree root is stretched around the planting part;
A third heat insulation plate is provided on the top surface of the soil layer to prevent evaporation of moisture in the soil layer and to suppress heat dissipation in the soil layer with the water retention drainage plate and the soil layer interposed therebetween. And the process of
A fourth step of planting a root pot of a tree in the planting part;
Before the second step, a step of installing a support member that supports the heat insulating plate and keeps the thickness of the guest soil layer constant on the water retention drainage plate ;
A green shade greening method characterized by comprising: The green shade planting method according to claim 6, further comprising a step of laying a sheet material for preventing outflow of customer soil on the water retention / drainage plate after the first step. A step of laying a walking board on top of the heat insulating plate ;
Green area greening method according to claim 6 or 7, characterized in that the seam of the walking plate is provided with a watering means for sending water into the insulation plate formed water passing holes.

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