JP2010011809A - Planting base, green space structure, and method for creating green space - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a planting base sufficiently receiving load such as the wheel pressure of vehicles or step pressure by walkers, easily set up and having enough moisture retention, allowing groundcover plants to sufficiently grow, and enabling securement of a broad greening area. <P>SOLUTION: The planting base 2 comprises a mixture soil layer 11 laid on an actual field ground G, and a plate-like member 21 made to be interposed between the mixture soil layer 11 and groundcover plants 3 planted on the mixture soil layer 11. The mixture soil layer 11 has hard granular bodies 12 in contact with one another to form clearances through which the roots of the groundcover plants 3 can be passed, and soil 13 charged in the clearances between respective hard granular bodies 12. The plate-like member 21 is provided with an opening 22 through which the root of the groundcover plants 3 can be passed. Such structure makes the roots of the groundcover plants 3 pass through the opening 22 of the plate-like member 21 and the soil 13 in the mixture soil layer 11 and reach the actual field ground G so as to supply water to the groundcover plants 3 from the actual field ground G. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides, for example, a planting base for growing a plant in a place where a predetermined load is applied from above, such as a parking lot or a sidewalk, a green space structure installed in the site, and a plant in the site It is related with the green space creation method of creating the green space covered with.

  In recent years, from the viewpoint of mitigating the heat island phenomenon and preventing global warming to reduce carbon dioxide emissions, greening of parking lots and sidewalks with vegetation such as turf grass has been actively carried out. Various techniques have been proposed in the past for protecting the geological plants planted on parking lots and sidewalks from loads such as automobile wheel pressure and pedestrian treading pressure.

  9 and 10 are diagrams for explaining the first prior art, and are cross-sectional views of a planting base on which a geological plant is planted. As shown in FIGS. 9 and 10, the planting bases 101 and 102 in the first conventional technique are laid and rolled with relatively fine crushed stones 105 having a particle size of, for example, several tens of millimeters or less on the local ground 104, A plurality of protective materials 111, 121 are arranged so as to spread in a plane, and soil 107 is laid between the protective materials 111, 121. Are planted.

  The protective material 111 shown in FIG. 9 is made of a synthetic resin having a plurality of substantially columnar support legs 112 and a base portion 113 that connects the support legs 112 in a standing state with a predetermined interval. A sheet-like member, a plurality of the sheet-like members arranged in a plane, joined together and placed on the crushed stone layer 105, and the top of the support leg 112 protrudes slightly above the geological plant 106. It is installed so as to be in the vertical position (see, for example, Patent Document 1).

  A protective material 121 shown in FIG. 10 includes a block member 122 such as a brick or concrete having a cubic shape, and the block member 122 is placed on the crushed stone layer 105 so as to spread in a plane at a predetermined interval. is doing. And the soil 107 is laid between each block member 122, and the geological plant 106 is planted on the soil 107, The height which the upper surface of the block member 122 protrudes a little upwards rather than the geological plant 106 It is installed so as to be in position.

  In the first prior art described above, when used in, for example, a parking lot or a sidewalk, loads such as automobile wheel pressure and pedestrian treading pressure are supported by the protective materials 111 and 121 and the crushed stone layer 105, The plant 106 is protected and the protection materials 111 and 121 are prevented from sinking.

  FIG. 11 is a diagram for explaining the second prior art, and is a cross-sectional view of the planting base 103 on which the local plant 106 is planted. As shown in FIG. 11, the planting base 103 in the second prior art is constructed by laying a continuous void hardening body 131 having a void portion continuous inside, such as porous concrete, on the local ground 104, A mixed soil layer 132 that spreads with a predetermined thickness is formed by placing mixed soil in which crushed stone and soil are mixed, and a ground plant 106 is planted on the mixed soil layer 132.

  In the second prior art described above, for example, when used in a parking lot or a sidewalk, a load such as a wheel pressure of a parked car or a pedestrian pressure is applied to the crushed stone of the mixed soil layer 132 and the continuous void hardening body 131. By supporting in this, the ground plant 106 is protected and the subsidence of the ground plant 106 is prevented. Then, the root of the geological plant 106 is inserted into the soil of the mixed soil layer 132 and the void portion of the continuous void hardened body 131 to ensure the growth of the root of the geological plant 106 (see, for example, Patent Document 2). ).

JP 2007-43978 A Japanese Patent Laid-Open No. 11-21898

  However, in the case of the first prior art, since the crushed stone layer 105 is interposed between the local ground 104 and the soil 107, the ground plant 106 has the root of the ground plant 106 below the crushed stone layer 105. It cannot be stretched and water cannot be taken from the local ground 104. Therefore, since the amount of water retained in the soil 107 is limited, it is necessary to regularly spray water at a high frequency, resulting in high costs. For example, when the thickness of the soil layer 107 is 100 millimeters and the water retention rate of the soil 107 is 30%, the water retention amount per square meter is 30 liters. When cultivating the geological plant 106 with a daily transpiration amount of 5 liters per square meter, watering is required once every 6 days.

  In particular, in the case of the prior art shown in FIG. 9, it is necessary to prepare a dedicated protective material 111, and the installation work becomes large. Therefore, there is a problem that the material cost and the construction cost are expensive.

  Further, in the case of the prior art shown in FIG. 10, since the lateral connection of the geological plant 106 is interrupted by the protective material 121, for example, when the geological plant 106 is turfgrass, there is a risk that the growth of the stems may be hindered. There is. Therefore, when a turfgrass in a certain place is killed, it cannot be recovered by the surrounding turfgrass, or the recovery is delayed. Moreover, when the protective material 121 is a block member, the area which can cultivate the geological plant 106 becomes narrow by that much, and it has the problem that a greening rate is low.

  And in the case of the 2nd prior art, since the intensity | strength of the continuous space | gap hardening body 131 needs to be ensured, the magnitude | size of the space | gap part and its quantity are restrict | limited, Furthermore, the soil with which a space | gap part is filled up Therefore, there is a problem that the water retention amount of the continuous void cured body 131 is small and it is necessary to spray water frequently.

  In addition, it is necessary to fill the voids of the continuous void cured body 131 with soil, and there is a problem that it takes time and labor to manufacture and install, resulting in high costs. Moreover, when a continuous void | hardened hardening body is comprised using porous concrete, there exists a problem that manufacture and disposal require an effort and cost.

  The present invention has been made in view of the above points, and the object of the present invention is to be able to receive a load from above such as a wheel pressure of an automobile or a pedaling pressure of a pedestrian and to be easily installed. The object of the present invention is to provide a planting base, a green space structure, and a green space creation method that has a sufficient amount of water retention, can sufficiently cultivate geological plants, and can secure a wide area of green space.

  The planting base of the present invention that solves the above problems is a planting base for growing a geophytic plant in a place where a load is applied from above, and abuts each other in a state of being laid on the local ground. A mixed soil layer having a hard granule forming a gap through which the roots of the geological plant can be inserted, and a soil filled in the gap between the hard granule, and planted on the mixed soil layer It is characterized by having a plate-like member having an opening that is interposed between the plant to be planted and the mixed soil layer, extends in a planar shape, and allows the root of the plant to be inserted.

  According to the planting base of the present invention, it is possible to pass through the opening of the plate-like member and the soil of the mixed soil layer so that the root of the geological plant can reach the local ground. Therefore, the roots of the local plant can be stretched deeply and widely, and water can be replenished from the local ground to the local plant. Accordingly, the amount of water retained is increased, and regular watering can be omitted, or the time interval of watering can be widened.

  The load applied from above the geological plant can be received and dispersed by the plate-like member and transmitted from the hard granular material of the mixed soil layer to the local ground. Therefore, sinking due to a load can be prevented, and solidification of the soil filled in the gaps between the hard granular bodies can be prevented. Therefore, for example, when used in a parking lot or a sidewalk, it is possible to protect the terrestrial plants from loads such as wheel pressures of automobiles and pedestrian pressures.

  A preferred embodiment of the planting base according to the present invention is characterized in that a soil layer is interposed between the mixed soil layer and the geological plant, and the plate member is buried in the soil layer. According to this, it is possible to create a planting base by laying soil with a plate-like member placed on the mixed soil layer to form a soil layer, and burying the plate-like member in the soil layer it can. Therefore, it is possible to easily create a planting base having a flat upper surface, and it is possible to easily plant a geological plant. And the water retention can be increased by the soil layer, the rooting of the local plant can be improved, and the local plant can be cultivated more actively.

  Moreover, in preferable embodiment of the planting base | substrate by this invention, you may comprise a plate-shaped member with either an expanded metal, a punching metal, and a grating. According to this, an existing general-purpose product can be used as it is for the plate-like member, and the material cost can be suppressed and construction can be performed at a lower cost than purchasing a dedicated product.

  Moreover, it is preferable that a hard granular material is a crushed stone and the particle size is a magnitude | size between 20 millimeters and 100 millimeters. And it is preferable that the quantity of the soil filled in the gap | interval between each hard granular material is the quantity of 1 to 1.2 times the volume of the said gap | interval. Moreover, turfgrass is mentioned as an example of a geophyte plant.

  According to the green space structure of the present invention, the green space structure is installed at a place where a load is applied from above, and is laid on the local ground, and abuts each other to pass through the roots of the geological plant. A mixed soil layer having hard granulates that form possible gaps and soil filled in the gaps between each hard granule, and a plant layer having geological plants planted on the mixed soil layers, It has a plate-like member that is interposed between the plant layer and the mixed soil layer, extends in a planar shape, and has an opening through which the root of the geological plant can be inserted.

  Further, according to the green space creation method of the present invention, in the green space creation method for creating a green space covered with geological plants in a place where a load is applied from above, the green ground is brought into contact with each other on the local ground. A step of laying a mixed soil having a hard granule forming a gap through which the root of the plant can be inserted and a soil filled in the gap between each hard granule to form a mixed soil layer; and A step of placing a plate-like member having an opening through which the root can be inserted so as to extend along the upper surface of the mixed soil layer, and laying the soil to a height position where the plate-like member is buried on the mixed soil layer. And a step of forming a soil layer and a step of planting a geological plant on the soil layer to form a plant layer.

  According to the present invention, it is possible to pass the gap between the opening of the plate-like member and the hard granular body so that the roots of the geological plants can reach the local ground, and to replenish moisture from the local ground to the geological plants. be able to. Therefore, regular watering can be omitted or the time interval of watering can be extended.

  The load applied from above the geological plant can be received and dispersed by the plate-like member and transmitted from the hard granular material of the mixed soil layer to the local ground. Therefore, sinking due to a load can be prevented, and solidification of the soil filled in the gaps between the hard granular bodies can be prevented. Therefore, for example, when used in a parking lot or a sidewalk, it is possible to protect the terrestrial plants from loads such as wheel pressures of automobiles and pedestrian pressures.

Next, embodiments of the present invention will be described below with reference to the drawings.
1 is a perspective view showing a green space structure 1 in a partial cross section, FIG. 2 is an enlarged cross-sectional view showing a portion I in FIG. 1, and FIG. 3 is a diagram for explaining the configuration of a plate-like member 21. .

  The green space structure 1 is a green parking lot and has a parking space for one car. As shown in FIG. 1, the green space structure 1 is composed of a planting base 2 formed on the local ground G, and a show plant 3 planted on the planting base 2.

  As shown in FIG. 2, the planting base 2 includes a mixed soil layer 11 and a plate-like member 21. The mixed soil layer 11 is obtained by spreading mixed soil on the local ground G with a predetermined thickness. The mixed soil is in contact with each other in a laid state to form a gap between which the roots of the geological plant 3 can be inserted, and the soil 13 filled in the gap between the hard granules 12 Consists of.

  The plate-like member 21 is installed between the mixed soil layer 11 and the geological plant 3 so as to extend in a planar shape. As shown in FIG. 1, the plate-like member 21 is placed on the mixed soil layer 11 so as to be positioned below the tire passage portion. And the soil layer 31 which lays the soil on the mixed soil layer 11 and the plate-shaped member is buried is formed, and the plant 3 is planted on the soil layer 31 to form the plant layer 41. .

  As shown in FIG. 2, the mixed soil layer 11 is obtained by spreading mixed soil obtained by mixing the hard granular bodies 12 and the soil 13 on the local ground G with a substantially constant thickness. The thickness of is preferably 50 millimeters or more, particularly preferably in the range of 50 millimeters to 200 millimeters. In this embodiment, it is spread with a thickness of about 100 millimeters.

  The hard granular material 12 is made of, for example, crushed stone, and has a size and a shape that form a gap through which the roots of the geological plant 3 can be inserted in a state where the hard granular material 12 is laid so as to contact each other. The strength of the hard granular body 12 only needs to be strong enough to prevent consolidation of the soil 13 when a load is applied from above.

  The size of the hard granular material 12 may be any size as long as it does not include a particle size of 10 millimeters or less, and preferably has a particle size of 20 millimeters to 100 millimeters. In the present embodiment, crushed stone having a particle size of 30 to 50 millimeters is used. When the size of the hard granular material 12 is 10 millimeters or less, the gap into which the soil 13 enters becomes small, which is not preferable.

  The soil 13 of the mixed soil layer 11 is filled with no gap between the hard granular bodies 12 laid so as to contact each other. The soil 13 may be anything that can maintain water retention, and may mix organic matter. The amount of the soil 13 is preferably about 1 to 1.2 times the volume of the gap formed between the hard granular bodies 12, and in this embodiment, the volume of the gap between the hard granular bodies 12 The same amount (1 time) is set.

  The amount of soil 13 is determined in consideration of mixing variation and soil 13 change. If the amount of the soil 13 is less than the volume of the gaps between the hard granular bodies 12, voids are formed in the mixed soil layer 11, and the mixed soil layer 11 is easily deformed by a load from above, which is not preferable. Moreover, when there is too much quantity of the soil 13, a load cannot be transmitted with the hard granular material 12, the soil 13 will be compacted more than necessary, and the ground plant 3 of the ground plant 3 by the lack of oxygen in the soil 13 or a drainage defect. It is not preferable because the growth is hindered and the ground plant 3 may die.

  The plate-like member 21 is installed at a place where the left and right tires of the automobile pass, which is a part where a load is applied. As shown in FIG. 1, the plate-like members 21 are installed parallel to each other with a distance that matches the distance between the left and right tires of the automobile.

  Each plate-like member 21 has a width that is wider than the tread surface of the tire T (see, for example, FIG. 3), and a length in the longitudinal direction of the parking space (see, for example, FIG. 1). In the embodiment, the width is set to 300 mm, the length is 1000 mm, and the thickness is 10 mm.

  As shown in FIG. 3A, the plate-like member 21 is provided with a plurality of openings 22 through which the roots of the geological plant 3 can enter and extend downward. The plate-like member 21 receives and disperses the load throughout the plate-like member 21, prevents local subsidence, and prevents the soil 13 filled between the hard granular bodies 12 from being compacted.

  As the plate-like member 21, existing general-purpose products such as expanded metal, punching metal, and grating can be used as they are. Therefore, the cost can be reduced and construction can be performed at a lower cost than purchasing a dedicated product.

  The plate-like member 21 may be made of a hard material capable of receiving a load. For example, it may be a resin material such as a hard plastic instead of a metal material. In the present embodiment, as shown in FIG. 3, an expanded metal 25 is interposed between a pair of metal rod-shaped members 23, 24, and both end portions in the width direction of the expanded metal 25 are each rod-shaped member 23, 24. It is comprised by welding and fixing to each.

  The plate-like member 21 having the above-described configuration can reduce the weight as compared with the plate member 21 made of punching metal or grating. Therefore, it is possible to facilitate construction work and prevent sinking due to its own weight.

  Further, when the distance between the pair of rod-like members 23 and 24 is made narrower than the tread surface of the tire T, the pair of rod-like members 23 and 24 can receive the wheel pressure load of the tire T. And since the wheel pressure load of the tire T is not added between a pair of rod-shaped members 23 and 24, this area | region can be ensured as a growth space of the geological plant 3. FIG.

  In addition, the installation place of the plate-shaped member 21 is not limited between the mixed soil layer 31 and the geological plant 3, and may be installed inside the mixed soil layer 31. Moreover, you may install not only in the place where the tire T passes the plate-shaped member 21, but in the parking lot whole surface where the geopark 3 is raised.

  The soil layer 31 is configured by laying soil on the mixed soil layer 11 so as to bury the plate-like member 21. In this embodiment, it is spread with a thickness of about 20 millimeters. The soil is not limited as long as the water retention can be maintained in the same manner as the soil 13 of the mixed soil layer 11, and organic matter may be mixed.

  By providing the soil layer 31, the planting base 2 having a flat upper surface can be easily created, and the geological plant 3 can be easily planted. Moreover, water retention can be improved and the rooting of the ground plant 3 can be made favorable. Therefore, it is possible to grow the geological plant 3 more actively.

  The ground performance plant 3 is planted over the entire parking space. In the present embodiment, the turfgrass 51 is used as the earth performance plant 3, but other plants may be used as long as they can withstand the load from above. The turfgrass 51 includes a stem 52 extending along the upper surface of the soil layer 31 and an upright stem 53 extending upward from the upper surface of the soil layer 31.

  According to the green space structure 1 having the above-described configuration, the root of the geological plant 3 can reach the local ground G through the opening 22 of the plate-like member 21 and the soil 13 of the mixed soil layer 11. Accordingly, the roots of the ground plant 3 can be stretched deeply and widely, and the ground plant 3 can be replenished with water from the local ground G. Accordingly, the amount of water retained is increased, and regular watering can be omitted, or the time interval of watering can be widened. Therefore, the geological plant 3 can be nurtured healthy without frequent watering.

  Then, the load of the automobile applied from above the geological plant 3 is received by the plate-like member 21, dispersed throughout the plate-like member 21, and transmitted from the hard granular material 12 of the mixed soil layer 11 to the local ground G. And can prevent sinking due to load. Therefore, wrinkles can be prevented from being formed in the portion through which the tire T passes. Moreover, consolidation of the soil 13 with which the gap | interval between each hard granular material 12 was filled can be prevented.

  And since the plate-shaped member 21 has the structure interposed between the mixed soil layer 11 and the ground plant 3, for example, when the ground plant 3 is the turf grass 51, the growth of the stem 52 is hindered. There is no. Therefore, when the turf grass 51 is damaged, it can be quickly recovered. In addition, the plate-like member 21 does not limit the planting area of the local plant 3, and a large green area can be secured. Further, since the plate-like member 21 is buried in the soil layer 31 and is not exposed to the outside, for example, when walking down after getting out of the automobile after parking, the foot does not get caught and good walking performance is obtained. be able to.

  FIG. 4 is a modification of the green space structure 1 described above, and corresponds to FIG. In the green space structure 1, the soil layer 31 is not essential, and the plate-like member 21 may be embedded in the mixed soil layer 11 as shown in FIG.

  FIG. 5 is still another modified example of the above-described green space structure 1, and corresponds to FIG. The installation place of the plate-like member 21 is not limited to the place through which the tire T passes, and may be installed so as to extend over the entire parking space, for example.

[Demonstration experiment]
Next, based on FIGS. 6 to 8, an outline and results of a demonstration experiment conducted by the inventors will be described. This experiment demonstrates the subsidence and damage of the terrestrial plant 3.

FIG. 6 is a cross-sectional view schematically showing the configuration of the parking lot used in the experiment, and FIG. 7 is a graph showing the measurement results of the depth of the cage.
As shown in FIG. 6, the experimental method is to prepare a parking lot in which a plate-like member 21 is installed only on one side of an automobile, and every week so that the operating rate of the parking lot is 30% to 50%. After parking, the depth of the ridge was measured after about 2 months. The thickness of the mixed soil layer was set to 100 mm, the thickness of the soil layer was set to 20 mm, and the thickness of the geological plant was set to about 40 mm.

  As a result of the experiment, as shown in FIG. 7, on the wheel side where the plate-like member 21 is not provided, the depth of the ridge is about 15 millimeters, whereas the wheel provided with the plate-like member 21. On the side, the depth of the ridge is about 7 millimeters for expanded metal and 8 millimeters for grating, and is a conventional point-like protective material (see, for example, protective material 111 in FIG. 9) or block member (eg, The depth of the wrinkles was almost the same as that using the protective material 121 in FIG.

  From the above experimental results, it is clear that the depth of the ridge can be suppressed by interposing the plate-like member 21 such as expanded metal or grating between the mixed soil layer 11 and the geological plant 3. became. This is because the plate-like member 21 receives and disperses the load from the tire T and transmits it to the local ground G from the hard granular material 12 of the mixed soil layer 11, preventing sinking due to the load, It can be concluded that this is because the consolidation of the soil 13 is prevented.

  FIG. 8 is a table showing the specific details of the damage of the ground plant 3 in the tire passing portion. As shown in FIG. 6, the experimental method prepared the parking lot which installed the plate-shaped member 21 only on the one-wheel side of a motor vehicle, parked the motor vehicle regularly, and measured the damage degree of the plant 3. The parking occupancy rate was 30% to 50%.

  As shown in FIG. 8, the experimental result shows that the green plant 1 with a mixed soil layer thickness of 200 mm, no peat moss, and 50% soil volume has little damage to the ground plant 3 due to the tire T. It was. In particular, it has been found that there is less damage to the terrestrial plant 3 than the conventional point-like protective material, and the present invention has an advantage.

  From the above experimental results, it became clear that the damage of turfgrass can be suppressed. It can be concluded that this is because the load from the tire T is received and dispersed by the plate-like member 21 and transmitted from the hard granular material 12 of the mixed soil layer 11 to the local ground G.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiment, and there are design changes and the like within a scope not departing from the gist of the present invention. They are also included in the present invention.

  For example, in the above-described embodiment, the case of a parking lot has been described as an example, but it can be sufficiently applied to a place where a load is repeatedly applied from above, such as a sidewalk where a pedestrian walks, Similar effects can be obtained. In particular, since there are no protrusions protruding upward from the geological plant 3 as compared with the prior art, the pedestrian's feet are not caught and good walking performance can be obtained.

The whole figure which shows the structure of the green space structure in this Embodiment partially in a cross section. Sectional drawing which expands and shows the I section of FIG. The figure explaining the structure of a plate-shaped member. Sectional drawing which shows the modification of this Embodiment. Sectional drawing which shows the further another modification of this Embodiment. Sectional drawing which shows typically the structure of the parking lot used for the test. The graph which shows the measurement result of the depth of a ridge. The table | surface which shows the damage specific of the lawn of the tire passage part. The figure explaining a prior art. The figure explaining a prior art. The figure explaining a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Green tract structure 2 Planting base 3 Ground plant 11 Mixed soil layer 12 Hard granular material 13 Soil 21 Plate-like member 22 Opening part 31 Soil layer 41 Plant layer 51 Turf grass 52 Bud stem 53 Upright stem

Claims (8)

It is a planting base for growing a geological plant in a place where a load is applied from above,
A hard granule that forms a gap through which the roots of the geophytes can be inserted in contact with each other in a state of being laid on the local ground, and soil that is filled in the gap between the hard granule Having a mixed soil layer,
A plate having an opening that is interposed between the geological plant planted on the mixed soil layer and the mixed soil layer, extends in a planar shape, and can be inserted through the root of the geological plant. Members,
A planting base characterized by having.   The planting base according to claim 1, wherein a soil layer is interposed between the mixed soil layer and the geological plant, and the plate member is buried in the soil layer.   The planting base according to claim 1, wherein the plate-like member is any one of expanded metal, punching metal, and grating.   The planting base according to any one of claims 1 to 3, wherein the hard granular material is crushed stone and has a particle size of 20 to 100 millimeters.   5. The amount of soil filled in the gaps between the hard particles is 1 to 1.2 times the volume of the gaps. 5. Planting base described in one.   The planting base according to any one of claims 1 to 5, wherein the geological plant is turfgrass. A green space structure installed in a place where a load is applied from above,
A mixed soil layer having hard granular material laid on the local ground and forming a gap between which the roots of the geological plant can be inserted in contact with each other and soil filled in the gap between the hard granular materials When,
A plant layer having a geological plant planted on the mixed soil layer;
A plate-like member having an opening that is interposed between the plant layer and the mixed soil layer, extends in a planar shape, and can be inserted through the roots of the geological plant;
The green space structure characterized by having. In the green space creation method of creating a green space covered with geological plants in a place where a load is applied from above,
On the local ground, a mixed soil having hard granules that form a gap that can be inserted through the roots of the geological plant in between, and soil that fills the gap between the hard granules Laying and forming a mixed soil layer;
Placing a plate-like member having an opening through which the root of the geological plant can be inserted so as to extend along the upper surface of the mixed soil layer;
Laying soil to a height position where the plate-like member is buried on the mixed soil layer, and forming a soil layer;
Planting the geological plant on the soil layer to form a plant layer;
A green space creation method characterized by including.

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