JP3771522B2 - Roof greening method - Google Patents

Roof greening method Download PDF

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JP3771522B2
JP3771522B2 JP2002212659A JP2002212659A JP3771522B2 JP 3771522 B2 JP3771522 B2 JP 3771522B2 JP 2002212659 A JP2002212659 A JP 2002212659A JP 2002212659 A JP2002212659 A JP 2002212659A JP 3771522 B2 JP3771522 B2 JP 3771522B2
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roof
vegetation
sheet
power generation
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JP2004049139A (en
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廉 山田
雅文 大島
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ロンタイ株式会社
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/24Structural elements or technologies for improving thermal insulation
    • Y02A30/254Roof garden systems; Roof coverings with high solar reflectance
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00Integration of renewable energy sources in buildings
    • Y02B10/10Photovoltaic [PV]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B80/00Architectural or constructional elements improving the thermal performance of buildings
    • Y02B80/32Roof garden systems
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

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  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
  • Photovoltaic Devices (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、建物の屋根、特に傾斜した屋根を緑化するための屋根緑化方法に関する。
【0002】
【従来の技術】
屋根緑化(屋上緑化)は、夏場は太陽熱を遮断して建物内部の温度上昇を抑えて冷房に要するエネルギを削減し、冬場は建物内部から逃げる熱を抑えて暖房に要するエネルギを削減する。しかし、屋根緑化を含む屋根荷重が増加すると、建物の構造強度を高める必要が生じる。そのため、屋根緑化に使用する土壌として、近年、黒土などの自然土壌に無機・有機系土壌改良材を混入した改良土壌、または軽量資材を主成分とした人工軽量土壌などの軽量土壌が利用されている。
【0003】
【発明が解決しようとする課題】
しかし、軽量土壌は、軽量であるために、風によって飛散し易い。そのために、施工に当たっては風の強い日は避けなければならないとか、施工時には軽量土壌に水分を含ませて飛散し難くするといった工夫が必要である。また、傾斜屋根では土壌の滑落を防止するために、屋根に滑り止め用アンカーを打ち込むなどの措置を講じなければならず、屋根にかかる負担や作業に要する負担が大きくなるという新たな問題が生じている。さらに、建物にかかる負担を軽減するという目的から厚い植生基盤を確保することが難しいことに加え、地表のように地下から水が供給される状況でないので、植物が乾燥害の影響を受けやすく、また潅水の手間もかかるという問題がある。
【0004】
【課題を解決するための手段】
このような問題を解消するために、本発明は新たな屋根緑化方法を提供するもので、その屋根緑化方法は、
屋根の傾斜角度よりも大きな安息角を有する無機質系土壌改良材を分解性のシートからなる筒に充填して複数の植生筒体を用意する工程と、
用意された複数の植生筒体を、該植生筒体の長手方向を屋根の傾斜方向と直交する方向に向けて、屋根上に配置して植生基盤を形成する工程と、
匍匐性植物の種子を保持した種子シートとネットを重ねて一体化した植生シートを、植生基盤上に配置する工程と、
植生シートを植生基盤に固定する工程からなるものである。
【0005】
また、本発明の他の形態の屋上緑化方法は、ネットの上に所定の間隔をあけて太陽発電パネルを配置する工程と、上記太陽発電パネルで発電した電力を用いて揚水ポンプを駆動し、植生基盤及び植生シートに水を注ぐ工程とを備えたものである。
【0006】
【発明の実施の形態】
(1)屋根緑化材:
図1は、建物10と、この建物10の傾斜屋根11に屋根緑化材12を施工している状況を示す図である。建物10は、居住用の建屋であってもよいし、工場・事務所などの産業用建屋であってもよい。屋根緑化材12は、図2に示すように、建物10の屋根11上に敷設される防根シート13と、この防根シート13の上に敷き詰められる植生筒体14と、敷き詰められた複数の植生筒体14を覆う種子シート15と、この種子シート15を覆うネット16からなる。
【0007】
(2)防根シート:
防根シート13としては、市販されている種々の防根シートが好適に利用できる。なお、この防根シート13は、必ずしも必要なものでなく、屋根11の材料によっては不要である。
【0008】
(3)植生筒体:
植生筒体14は、所定の大きさの筒状袋17に、植生基盤となる基盤材18を充填したものである。筒状袋17は、分解性のシートを所定の大きさの筒(例えば、施工後の長さが500mm、幅が200mm、厚さが50mmとなる筒)に加工したものである。なお、筒状袋17の長さは、基盤材18を充填後に適当な長さに切断してもよい。分解性シートとしては、例えば、通常の紙、ピートモスなどの土壌改良材を含む植生シート、不織布が利用できる。また、分解性シートに熱接着性の樹脂を含むものが好適に利用でき、この場合、分解性シートを加熱接着することで筒状袋17を得ることもできるし、筒状袋17に基盤材18を充填した後に該筒状袋17の縁を加熱して封止することもできる。筒状袋17は、分解性シートに熱接着性の樹脂を含むか否かに拘わらず、基盤材18を充填後に長手方向両端部を糸19で縫合してもよい。さらに、図3に示すように、複数の植生筒体14を並列に配置し、それぞれの両端を糸19で縫合して簾状に組み合わせてもよい。
【0009】
筒状袋17に充填される基盤材18は、屋根11の傾斜角度θよりも大きな安息角φを有する無機質系土壌改良材が好適に利用される。この無機質土壌改良材としては例えばバーミキュライト、ゼオライトなどの公知のものが利用でき、これらの土壌改良材は植生植物の種類に好適なものが選択される。当然、複数の土壌改良材を混合して用いてもよい。また、屋根緑化の場合は建物に加わる荷重を最小限に止めるために、基盤材18の湿潤比重を0.6〜1.0に抑えることが望ましいが、バーミキュライトはその湿潤比重が約0.6であることから、特に好適な材料であるといえる。
【0010】
基盤材18の安息角φは例えば注入法により測定される。この注入法は、一定の高さに配置された漏斗から試料を落下させて円錐状の堆積層を形成し、この円錐状堆積層の底円の直径と高さから算出するもので、以下の式によって定義される安息角θが与えられる。

Figure 0003771522
【0011】
複数の土壌改良材について注入法で測定された安息角を以下の表に示す。
Figure 0003771522
【0012】
(4)種子シート:
種子シート15は、2枚のシート基材20の間に短草系の匍匐性植物種子21と肥料22を挟んで一体化したものである。シート基材20としては、分解性シートが好適に利用でき、例えば通常の紙、土壌改良材をシート状に加工した種子シート、不織布が好適に利用できる。また、シート基材20には熱可塑性の樹脂を混入するのが好ましい。この場合、2枚のシート基材20を加熱して接着できる。また、種子シート15とネット16を加熱して接着することもできる。
【0013】
短草系の匍匐性植物としては、例えばケンタッキーブルーグラス、バミューダグラス、ノシバの他に、ハーブ類のクリーピングタイム、バナナミント、ペニーロイヤル、など草高が低いものが好適に利用できる。短草系の匍匐性植物が好ましく利用できる理由は、この植物はネットと絡み合うために該ネットと植生基盤との密着性が高まること、また根の長さが短いことから基盤厚の確保し難い状況にあっても充分に植物が生育できる環境を提供できるからである。また、匍匐性植物に属する、マメ科植物であるホワイトクローバは、土壌微生物である根粒菌を接種すれば、その菌が根に侵入して窒素固定の作用が発揮されるので、養分が不足し易い環境でも植物に必要な養分を与えることができるという効果が得られる。
【0014】
(5)ネット:
ネット16には、熱可塑性を有する合成樹脂(例えば、ポリエチレン、ポリプロピレン)・生分解性プラスチック・天然繊維(例えば、ジュート)からなる糸又はその糸を撚り合わせた紐を編成したものが利用できる。このネット16は、予め種子シート15と接着剤又は加熱若しくはステープラ等の機械的連結具によって一体化して植生シート23としておくことが好ましい。
【0015】
(6)施工方法:
まず、施工対象となる屋根11を清掃後、この屋根11の上に防根シート13を敷く。このとき、防根シート13は建物10の傾斜方向又はこれと直交する方向に隙間なく敷設され、必要であれば適当な接着剤を用いて屋根11に固定される。次に、複数の植生筒体14を、それらの長手方向を屋根11の傾斜方向と直交する方向に向けて、隙間なく配置する。続いて、敷設された植生筒体14の上に種子シート15とネット16を一体化した植生シート23を敷設し、適当な留め具(金属リング24)を、植生筒体14の縫合糸19とネット16に引っ掻けて、植生筒体14と植生シート23を一体化する。一体化された植生筒体14等は、適宜方法によって屋根11に固定される。例えば、図5に示すように棟25の両側に傾斜屋根11を有する建物10の場合、左右の傾斜屋根11に棟25を超えて連続的にネット16を配置し、これにより両側の植生筒体14等を重量的にバランスさせて安定させることができる。また、片側だけの傾斜屋根11の場合、ネット16の上端部、必要であれば左右および下端部を屋根11に接着剤等で固定した止め具に引っ掻けて、植生シート23を固定する。
【0016】
これに代えて、適当な留め具を用いて植生筒体14・種子シート15・ネット16を予め一体化して帯状体を形成しておき、この帯状体を屋根11の上に敷設してもよい。さらに、一体化されていない植生筒体14・種子シート15・ネット16を屋根11の上に順次重ね、その後、これらを適当な留め具で一体的に連結してもよい。
【0017】
(7)屋根植生:
このようにして屋根11上に敷設された屋根緑化材12によれば、植生筒体14に充填された基盤材18の安息角φは屋根11の傾斜角θよりも大きいため、この屋根11の上に安定して保たれる。また、施工後に植生筒体14が分解して基盤材18を拘束するものが無くなっても、基盤材18は屋根11の上に安定して留まる。一方、自然の降雨によってもたらされた水は植生筒体14中の基盤材18及び保水材に吸収されて保持される。また、種子シート15に保持された肥料22が降雨によって溶解すると、その溶解した肥料は基盤材18に保持される。そして、基盤材18に保持された水と肥料は、植物に好適な生育環境を提供する。
【0018】
一方、種子シート15に保持された植物種子21から成長した植物の根は、基盤材18に侵入し、この基盤材18に安定して保持される。また、匍匐性植物の茎は、基盤材18の表面を周囲に広がってネット16に絡み、ネット16と植生筒体14とを一体化する。そのために、屋根11の上に安定した緑化帯が形成される。
【0019】
(8)自動注水装置:
以上に説明した屋上緑化には、緑化帯に安定して水を供給するために、図6に示す自動注水装置30を付設することが好ましい。この自動注水装置30は、発電設備31と、この発電設備31で発電された電力を利用した揚水・散水設備32を有する。発電設備31は、図7に示すように、太陽発電パネル33と、この太陽発電パネル33を屋根11の上に支持する架台(屋根馬)34を有し、架台34は屋根11に固定されたワイヤ35によって所定の位置に保持される。揚水・散水設備32は、屋根11に沿ってその下端まで流れ着いた水を回収する樋36と、この樋36に回収された水を蓄えておく貯水タンク37と、屋根11の棟25に沿ってほぼ水平に配置されて固定された注水(散水)管38と、太陽発電パネル33で得られた電力を利用して貯水タンク37の水を注水管38まで揚水するポンプ39を備えている。そして、ワイヤ35は、図6に示すように、一端が注水管38に連結され、図8に示すように、他端が屋根11の先端部の裏側に取り付けた支線止め40に連結される。
【0020】
このような構成を備えた自動注水装置30によれば、貯水タンク37に蓄えられた水は、太陽発電パネル33で発電された電力によって駆動するポンプ39によって注水管38に揚水され、屋根11の棟25の位置からその下流側にある緑化帯に供給される。また、緑化帯を流れた出た水は樋36に回収されて、貯水タンク37に再び戻される。なお、図示しないが、貯水タンク37には適当な水位計と該水位計で計測された水位が所定レベル以下に下がったときに自動的に水を注水する注水器が設けてあり、これにより貯水タンク37内のレベルが一定に保たれる。
【0021】
この自動注水装置30において、特に、太陽発電パネル33は、この太陽発電パネル33の下にも植物が繁茂できるように、屋根11から適当な間隔(好ましくは、約30cm)をあけて保持されている。そのため、太陽発電パネル33を緑化の無い屋根に固定した場合には屋根からの照り返しによって太陽発電パネルが熱的ダメージを受けるが、太陽発電パネル33の下に植物を繁茂させることで該太陽発電パネル33の裏には断熱空間が形成されるので、太陽発電パネル33の耐久性が向上するという効果が得られる。
【0022】
【発明の効果】
以上の説明から明らかなように、本発明に係る屋根緑化方法では、屋根上に設置する植生筒体には、屋根の傾斜角度よりも大きな安息角を有する無機質系土壌改良材を充填している。したがって、植生筒体が分解した後も、特に植生基盤の滑落防止措置を講じなくても、土壌改良材からなる植生基盤を安定して維持することができる。また、太陽発電パネルで発電された電力を用いて屋根に揚水するので、屋根緑化の維持管理コストが軽減される。
【図面の簡単な説明】
【図1】 建物とその傾斜屋根に屋上緑化を施工している状況を示す斜視図。
【図2】 屋根緑化材の断面図。
【図3】 植生筒体を屋根上に配置した状態を示す斜視図。
【図4】 図2の屋根緑化材から種子が発芽・発根した状態を示す断面図。
【図5】 屋根の両側に対称に屋根緑化材を配置した例を示す正面図。
【図6】 自動注水装置を備えた屋根緑化を示す斜視図。
【図7】 屋根に設置された発電設備の側面図。
【図8】 ワイヤの端部を屋根の支線止めに連結した状態を示す断面図。
【符号の説明】
10:建物
11:傾斜屋根
12:屋根緑化材
13:防根シート
14:植生筒体
15:種子シート
16:ネット
17:筒状袋
18:基盤材
19:糸
20:シート基材
21:種子
22:肥料
23:植生シート
24:金属リング
25:棟
30:自動注水装置
31:発電設備
32:揚水・散水設備
33:太陽発電パネル
34:架台
35:ワイヤ
36:樋
37:貯水タンク
38:注水管
39:揚水ポンプ
40:支線止め[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a roof greening method for greening a roof of a building, particularly an inclined roof.
[0002]
[Prior art]
Roof greening (rooftop greening) cuts off solar heat in summer and suppresses the temperature rise inside the building to reduce the energy required for cooling. In winter, it reduces heat escaping from the building and reduces the energy required for heating. However, when the roof load including roof greening increases, it becomes necessary to increase the structural strength of the building. Therefore, as soil used for roof greening, in recent years, light soil such as natural soil such as black soil mixed with inorganic / organic soil improver, or artificial light soil mainly composed of lightweight materials has been used. Yes.
[0003]
[Problems to be solved by the invention]
However, since light soil is lightweight, it is easily scattered by wind. For this purpose, it is necessary to avoid windy days during construction, and it is necessary to devise methods such as adding moisture to lightweight soil to make it difficult to scatter during construction. In addition, in order to prevent soil from sliding down on sloped roofs, it is necessary to take measures such as driving anti-slip anchors onto the roof, which creates a new problem of increasing the burden on the roof and the work required. ing. In addition, it is difficult to secure a thick vegetation base for the purpose of reducing the burden on the building, and since water is not supplied from the ground like the ground surface, plants are susceptible to drought damage, In addition, there is a problem that it takes time and effort for irrigation.
[0004]
[Means for Solving the Problems]
In order to solve such problems, the present invention provides a new roof greening method, the roof greening method,
A step of preparing a plurality of vegetation cylinders by filling a cylinder made of a degradable sheet with an inorganic soil improvement material having a repose angle larger than the inclination angle of the roof;
Arranging a plurality of prepared vegetation cylinders on the roof with the longitudinal direction of the vegetation cylinders oriented in a direction perpendicular to the inclination direction of the roof, and forming a vegetation base;
Arranging a seed sheet holding a dwarf plant seed and a vegetation sheet integrated with a net on a vegetation base;
It consists of the process of fixing the vegetation sheet to the vegetation base.
[0005]
Moreover, the rooftop greening method according to another aspect of the present invention includes a step of arranging the solar power generation panel with a predetermined interval on the net, and driving the pump using the power generated by the solar power generation panel, And a process of pouring water on the vegetation base and the vegetation sheet.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
(1) Roof greening material:
FIG. 1 is a diagram illustrating a situation where a roof greening material 12 is being constructed on a building 10 and an inclined roof 11 of the building 10. The building 10 may be a residential building or an industrial building such as a factory or office. As shown in FIG. 2, the roof greening material 12 includes a root prevention sheet 13 laid on the roof 11 of the building 10, a vegetation cylinder 14 spread on the root prevention sheet 13, and a plurality of spread It consists of a seed sheet 15 covering the vegetation cylinder 14 and a net 16 covering the seed sheet 15.
[0007]
(2) Root prevention sheet:
As the root prevention sheet 13, various commercially available root prevention sheets can be suitably used. In addition, this root prevention sheet 13 is not necessarily required, and is unnecessary depending on the material of the roof 11.
[0008]
(3) Vegetation tube:
The vegetation cylinder 14 is obtained by filling a cylindrical bag 17 having a predetermined size with a base material 18 serving as a vegetation base. The cylindrical bag 17 is obtained by processing a degradable sheet into a cylinder of a predetermined size (for example, a cylinder having a length after construction of 500 mm, a width of 200 mm, and a thickness of 50 mm). The cylindrical bag 17 may be cut to an appropriate length after filling the base material 18. As the degradable sheet, for example, normal paper, a vegetation sheet containing a soil improving material such as peat moss, or a non-woven fabric can be used. Moreover, what contains a heat-adhesive resin in a decomposable sheet can be used suitably. In this case, the cylindrical bag 17 can be obtained by heat-bonding the decomposable sheet, and the base material is attached to the cylindrical bag 17. After filling 18, the edge of the cylindrical bag 17 can be heated and sealed. Regardless of whether or not the decomposable sheet contains a heat-adhesive resin, the cylindrical bag 17 may be sewn with both ends in the longitudinal direction with the thread 19 after filling the base material 18. Furthermore, as shown in FIG. 3, a plurality of vegetation cylinders 14 may be arranged in parallel, and both ends may be sewn together with a thread 19 and combined in a hook shape.
[0009]
As the base material 18 filled in the cylindrical bag 17, an inorganic soil improvement material having a repose angle φ larger than the inclination angle θ of the roof 11 is preferably used. As this inorganic soil improving material, known materials such as vermiculite and zeolite can be used, and those suitable for the type of vegetation are selected. Of course, a plurality of soil conditioners may be mixed and used. Further, in the case of roof greening, it is desirable to suppress the wet specific gravity of the base material 18 to 0.6 to 1.0 in order to minimize the load applied to the building, but vermiculite has a wet specific gravity of about 0.6. Therefore, it can be said that it is a particularly suitable material.
[0010]
The angle of repose φ of the base material 18 is measured by, for example, an injection method. In this injection method, a sample is dropped from a funnel placed at a constant height to form a conical sedimentary layer, and is calculated from the diameter and height of the bottom circle of the conical sedimentary layer. The angle of repose θ defined by the equation is given.
Figure 0003771522
[0011]
The angle of repose measured by the injection method for a plurality of soil amendments is shown in the following table.
Figure 0003771522
[0012]
(4) Seed sheet:
The seed sheet 15 is obtained by integrating a short grass-type fertile plant seed 21 and a fertilizer 22 between two sheet base materials 20. As the sheet substrate 20, a degradable sheet can be suitably used. For example, normal paper, a seed sheet obtained by processing a soil improvement material into a sheet shape, and a nonwoven fabric can be suitably used. Moreover, it is preferable to mix a thermoplastic resin into the sheet base material 20. In this case, the two sheet base materials 20 can be heated and bonded. Further, the seed sheet 15 and the net 16 can be heated and bonded.
[0013]
As short-weed dwarf plants, for example, in addition to Kentucky bluegrass, Bermudagrass, and wild buckwheat, plants with low plant height such as herbal creeping time, banana mint, and penny royal can be suitably used. The reason why the short plant dwarf plant can be preferably used is that the plant is intertwined with the net, so that the adhesion between the net and the vegetation base is increased, and since the root length is short, it is difficult to secure the base thickness. This is because it is possible to provide an environment in which plants can sufficiently grow even under circumstances. White clover, a leguminous plant belonging to the dwarf plant, inoculates with root nodule bacteria, which are soil microorganisms, and the fungus invades the roots and exerts a nitrogen-fixing action. Even in an easy environment, the plant can provide the necessary nutrients.
[0014]
(5) Net:
The net 16 may be a yarn made of a synthetic resin having thermoplasticity (for example, polyethylene or polypropylene), a biodegradable plastic, or a natural fiber (for example, jute) or a knitted string formed by twisting the yarns. The net 16 is preferably integrated in advance with the seed sheet 15 by an adhesive or a mechanical connector such as a heating or stapler to form a vegetation sheet 23.
[0015]
(6) Construction method:
First, after cleaning the roof 11 to be constructed, a root-proof sheet 13 is laid on the roof 11. At this time, the root-preventing sheet 13 is laid without a gap in the inclination direction of the building 10 or in a direction orthogonal thereto, and is fixed to the roof 11 using an appropriate adhesive if necessary. Next, the plurality of vegetation cylinders 14 are arranged without gaps with their longitudinal directions oriented in a direction orthogonal to the inclination direction of the roof 11. Subsequently, a vegetation sheet 23 in which the seed sheet 15 and the net 16 are integrated is laid on the laid vegetation cylinder 14, and an appropriate fastener (metal ring 24) is attached to the suture thread 19 of the vegetation cylinder 14. The vegetation cylinder 14 and the vegetation sheet 23 are integrated by scratching the net 16. The integrated vegetation cylinder 14 and the like are fixed to the roof 11 by an appropriate method. For example, as shown in FIG. 5, in the case of the building 10 having the inclined roofs 11 on both sides of the ridge 25, the nets 16 are continuously arranged on the left and right inclined roofs 11 beyond the ridge 25, thereby vegetation cylinders on both sides. 14 and so forth can be balanced and stabilized. In the case of the inclined roof 11 only on one side, the vegetation sheet 23 is fixed by scratching the upper end portion of the net 16, and if necessary, the right and left and lower end portions with a stopper fixed to the roof 11 with an adhesive or the like.
[0016]
Instead of this, the vegetation cylinder 14, the seed sheet 15, and the net 16 may be integrated in advance using an appropriate fastener to form a band, and the band may be laid on the roof 11. . Further, the vegetation cylinder 14, the seed sheet 15, and the net 16 that are not integrated may be sequentially stacked on the roof 11, and then these may be integrally connected with an appropriate fastener.
[0017]
(7) Roof vegetation:
In this way, according to the roof greening material 12 laid on the roof 11, the repose angle φ of the base material 18 filled in the vegetation cylinder 14 is larger than the inclination angle θ of the roof 11. Keeps stable on top. Moreover, even if the vegetation cylinder 14 is disassembled after construction and there is no longer any thing that restrains the base material 18, the base material 18 remains stably on the roof 11. On the other hand, the water brought about by the natural rainfall is absorbed and held by the base material 18 and the water retaining material in the vegetation cylinder 14. Further, when the fertilizer 22 held on the seed sheet 15 is dissolved by the rain, the dissolved fertilizer is held on the base material 18. And the water and fertilizer hold | maintained at the base material 18 provide the suitable growth environment for a plant.
[0018]
On the other hand, plant roots grown from the plant seeds 21 held on the seed sheet 15 enter the base material 18 and are stably held by the base material 18. In addition, the stem of the dwarf plant spreads around the surface of the base material 18 around the net 16 and integrates the net 16 and the vegetation cylinder 14. Therefore, a stable greening zone is formed on the roof 11.
[0019]
(8) Automatic water injection device:
In order to stably supply water to the greening zone, it is preferable to attach the automatic water injection device 30 shown in FIG. The automatic water injection device 30 includes a power generation facility 31 and a pumping / sprinkling facility 32 that uses electric power generated by the power generation facility 31. As shown in FIG. 7, the power generation facility 31 includes a solar power generation panel 33 and a mount (roof horse) 34 that supports the solar power generation panel 33 on the roof 11, and the mount 34 is fixed to the roof 11. A predetermined position is held by the wire 35. The pumping / sprinkling facility 32 is provided along a ridge 36 for collecting water that has flowed along the roof 11 to the lower end thereof, a water storage tank 37 for storing the water collected in the ridge 36, and a ridge 25 of the roof 11. A water injection (sprinkling) pipe 38 arranged almost horizontally and a pump 39 for pumping water from the water storage tank 37 to the water injection pipe 38 by using electric power obtained by the solar power generation panel 33 are provided. As shown in FIG. 6, one end of the wire 35 is connected to the water injection pipe 38, and the other end is connected to a branch line stopper 40 attached to the back side of the front end portion of the roof 11 as shown in FIG. 8.
[0020]
According to the automatic water injection device 30 having such a configuration, the water stored in the water storage tank 37 is pumped to the water injection pipe 38 by the pump 39 driven by the electric power generated by the solar power generation panel 33, and It is supplied from the position of the ridge 25 to the greening zone on the downstream side. In addition, the water that has flowed out of the greening zone is collected in the jar 36 and returned to the water storage tank 37 again. Although not shown, the water storage tank 37 is provided with an appropriate water level meter and a water injector that automatically injects water when the water level measured by the water level meter falls below a predetermined level. The level in the tank 37 is kept constant.
[0021]
In this automatic water injection apparatus 30, in particular, the solar power generation panel 33 is held at an appropriate interval (preferably about 30 cm) from the roof 11 so that plants can also grow under the solar power generation panel 33. Yes. Therefore, when the solar power generation panel 33 is fixed to a roof without greening, the solar power generation panel is thermally damaged by reflection from the roof, but the solar power generation panel is caused by growing plants under the solar power generation panel 33. Since a heat insulating space is formed on the back side of 33, the effect of improving the durability of the solar power generation panel 33 is obtained.
[0022]
【The invention's effect】
As is clear from the above description, in the roof greening method according to the present invention, the vegetation cylinder installed on the roof is filled with an inorganic soil conditioner having a repose angle larger than the inclination angle of the roof. . Therefore, even after the vegetation cylinder is disassembled, the vegetation base made of the soil improvement material can be stably maintained without taking any measures for preventing the vegetation base from sliding down. In addition, since the roof is pumped using the electric power generated by the solar power generation panel, the maintenance management cost of roof greening is reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state where rooftop greening is being constructed on a building and its inclined roof.
FIG. 2 is a cross-sectional view of a roof greening material.
FIG. 3 is a perspective view showing a state where a vegetation cylinder is arranged on a roof.
4 is a cross-sectional view showing a state in which seeds have germinated and rooted from the roof greening material of FIG. 2;
FIG. 5 is a front view showing an example in which roof greening materials are arranged symmetrically on both sides of the roof.
FIG. 6 is a perspective view showing roof greening provided with an automatic water injection device.
FIG. 7 is a side view of a power generation facility installed on a roof.
FIG. 8 is a cross-sectional view showing a state in which an end of a wire is connected to a roof branch line stopper.
[Explanation of symbols]
10: Building 11: Inclined roof 12: Roof greening material 13: Root prevention sheet 14: Vegetation cylinder 15: Seed sheet 16: Net 17: Cylindrical bag 18: Base material 19: Yarn 20: Sheet base material 21: Seed 22 : Fertilizer 23: Vegetation sheet 24: Metal ring 25: Building 30: Automatic water injection device 31: Power generation equipment 32: Pumping and sprinkling equipment 33: Solar power generation panel 34: Mount 35: Wire 36: 樋 37: Water storage tank 38: Water injection pipe 39: Pumping pump 40: Stop branch line

Claims (2)

傾斜屋根を緑化する屋根緑化方法であって、
屋根の傾斜角度よりも大きな安息角を有する無機質系土壌改良材を分解性のシートからなる筒に充填して複数の植生筒体を用意する工程と、
用意された複数の植生筒体を、該植生筒体の長手方向を屋根の傾斜方向と直交する方向に向けて、屋根上に配置して植生基盤を形成する工程と、
匍匐性植物の種子を保持した種子シートとネットを重ねて一体化した植生シートを、植生基盤上に配置する工程と、
植生シートを植生基盤に固定する工程とを備えたことを特徴とする屋根緑化方法。
A roof greening method for greening an inclined roof,
A step of preparing a plurality of vegetation cylinders by filling a cylinder made of a degradable sheet with an inorganic soil improvement material having a repose angle larger than the inclination angle of the roof;
Arranging a plurality of prepared vegetation cylinders on the roof with the longitudinal direction of the vegetation cylinders oriented in a direction perpendicular to the inclination direction of the roof, and forming a vegetation base;
Arranging a seed sheet holding a dwarf plant seed and a vegetation sheet integrated with a net on a vegetation base;
A roof greening method comprising a step of fixing a vegetation sheet to a vegetation base.
ネットの上に所定の間隔をあけて太陽発電パネルを配置する工程と、上記太陽発電パネルで発電した電力を用いて揚水ポンプを駆動し、植生基盤及び植生シートに水を注ぐ工程とを備えたことを特徴とする請求項1に記載の屋根緑化方法。A step of placing solar power generation panels on the net with a predetermined interval, and a step of driving a pump using the power generated by the solar power generation panel and pouring water onto the vegetation base and the vegetation sheet. The roof greening method according to claim 1.
JP2002212659A 2002-07-22 2002-07-22 Roof greening method Expired - Fee Related JP3771522B2 (en)

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EP1617008B1 (en) 2003-04-23 2017-02-15 Kaneka Corporation Complex system of vegetation and solar cell
JP4866032B2 (en) * 2005-07-22 2012-02-01 大成建設株式会社 Tree planting structure
JP2007143412A (en) * 2005-11-24 2007-06-14 Kowa Seiki Kk Greening apparatus and method for greening ground
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JP5440980B2 (en) * 2010-01-28 2014-03-12 信 成井 Building surface greening method
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