JP2010063409A - Rooftop greening structure - Google Patents

Rooftop greening structure Download PDF

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JP2010063409A
JP2010063409A JP2008232714A JP2008232714A JP2010063409A JP 2010063409 A JP2010063409 A JP 2010063409A JP 2008232714 A JP2008232714 A JP 2008232714A JP 2008232714 A JP2008232714 A JP 2008232714A JP 2010063409 A JP2010063409 A JP 2010063409A
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shells
oyster
rooftop greening
vegetation base
oyster shells
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JP5146915B2 (en
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Nobuo Abe
信夫 阿部
Hideki Igarashi
秀樹 五十嵐
Naoto Kato
直人 加藤
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HONMA ZOEN KK
HONMAGUMI KK
Honma Corp
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HONMA ZOEN KK
HONMAGUMI KK
Honma Corp
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/02—Receptacles, e.g. flower-pots or boxes; Glasses for cultivating flowers
    • A01G9/033—Flat containers for turf, lawn or the like, e.g. for covering roofs
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
    • A01G24/10—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material
    • A01G24/12—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material containing soil minerals
    • A01G24/15—Calcined rock, e.g. perlite, vermiculite or clay aggregates

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rooftop greening structure having high water retentivity and high fertilizer retentivity, and further having a function to neutralize acid rain. <P>SOLUTION: The rooftop greening structure is such that a vegetation base is disposed on a rooftop, wherein the vegetation base 5 is produced by mixing pulverized oyster shells with pearlite as a submaterial. The specific surface area of the oyster shell is enlarged by pulverizing the porous oyster shells to improve water retentivity and the fertilizer retentivity. The rooftop greening structure is suitable as a rooftop greening vegetation base because the oyster shells are effectively recycled without wasting the oyster shells massively generated in the marine product industry and the oyster shells are light in weight. Although pulverization of the oyster shells has fear of causing bad influence on plant roots when a person gets on the shells for maintenance because the shells are formed each into an angulated shape having corner parts when pulverizing the oyster shells, the corner parts prevent bad influence due to the corner parts by addition of the submaterial. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、屋上緑化構造に関する。   The present invention relates to a rooftop greening structure.

従来、この種のものとして、屋上のコンクリート地の表面に防根シートを敷設し、その上に排水層として排水性基盤材を敷設し、この排水性基盤材の上にセパレータを設け、さらにその上に培土層としてシラス培土を盛土した屋上緑化設備などが提案されている（例えば、特許文献１）。
特開２００４−２０１６３２号公報 Conventionally, as this type, a root-proof sheet is laid on the surface of the concrete surface of the roof, a drainage base material is laid as a drainage layer thereon, a separator is provided on the drainage base material, and the A rooftop greening facility or the like embanked with shirasu soil as a cultivating layer has been proposed (for example, Patent Document 1).
JP 2004-201632 A

上記屋上緑化設備は、軽量で、排水性を備えたものとなるが、維持管理を考慮すると、保水能力と施肥保留能力の高いものが好ましい。また、屋上では酸性雨に晒される虞があるから、酸性雨を中和させる機能が得られれば、商品価値の高いものとなる。   The rooftop greening facility is lightweight and has drainage, but considering maintenance, it is preferable to have a high water retention capacity and fertilization retention capacity. Moreover, since there is a possibility of being exposed to acid rain on the rooftop, if a function of neutralizing acid rain is obtained, the commercial value is high.

そこで、本発明は、保水能力と施肥保留能力が高く、さらに酸性雨を中和させる機能を備えた屋上緑化構造を提供することを目的とする。   Therefore, an object of the present invention is to provide a rooftop greening structure having a high water retention capacity and fertilization retention capacity and a function of neutralizing acid rain.

請求項１の発明は、屋上に植生基盤を設けた屋上緑化構造において、前記植生基盤に粉砕した貝殻を混合したものである。   The invention of claim 1 is a roof greening structure in which a vegetation base is provided on the roof, and the crushed shell is mixed with the vegetation base.

請求項２の発明は、前記貝殻がカキ殻である。   In the invention of claim 2, the shell is an oyster shell.

請求項３の発明は、前記植生基盤に副材料を混合したものである。   According to a third aspect of the present invention, a secondary material is mixed with the vegetation base.

請求項４の発明は、前記カキ殻が５ｍｍ以下に粉砕されたものである。   According to a fourth aspect of the present invention, the oyster shell is pulverized to 5 mm or less.

請求項５の発明は、前記植生基盤の単位面積当たりの重量が６０kg/ｍ2以下である。 According to a fifth aspect of the present invention, the weight per unit area of the vegetation base is 60 kg / m 2 or less.

請求項１の構成によれば、粉砕した貝殻を用いることにより、軽量化が可能となると共に、貝殻の比表面積を増大させ、保水能力と施肥保留能力を向上することができる。また、混合した貝殻により、酸性雨を中和する機能を備えたものになる。   According to the structure of Claim 1, while using a ground shell, weight reduction is attained, the specific surface area of a shell is increased, and water retention capability and fertilization retention capability can be improved. Moreover, the mixed shell makes it possible to neutralize acid rain.

また、請求項２の構成によれば、多孔質なカキ殻を粉砕することにより、カキ殻の比表面積を増大させ、保水能力と施肥保留能力を向上する。そして、水産業で大量発生しているカキ殻を廃棄処分することなく、有効にリサイクルすることができ、また、カキ殻は軽量であるから、屋上緑化の植生基盤として好ましい。   Moreover, according to the structure of Claim 2, the specific surface area of an oyster shell is increased by grind | pulverizing a porous oyster shell, and the water retention capability and fertilization retention capability are improved. The oyster shells generated in large quantities in the fishery industry can be effectively recycled without being disposed of, and the oyster shells are light in weight, which is preferable as a vegetation base for rooftop greening.

また、請求項３の構成によれば、カキ殻を粉砕すると、角部を有する角張る形状となるため、維持管理などで人が載った場合、植物の根に悪影響を与える虞があるが、副材料を混合することにより角部による悪影響を防止することができる。   In addition, according to the configuration of claim 3, when oyster shell is crushed, it becomes an angular shape with a corner, so when a person is placed in maintenance and the like, there is a risk of adversely affecting the roots of the plant, Adverse effects due to the corners can be prevented by mixing the auxiliary material.

また、請求項４の構成によれば、５ミリ以下に粉砕することにより、砂と同様な大きさとなる。   Moreover, according to the structure of Claim 4, it becomes the magnitude | size similar to sand by grind | pulverizing to 5 mm or less.

また、請求項５の構成によれば、軽量な屋上緑化構造となる。   Moreover, according to the structure of Claim 5, it becomes a lightweight rooftop greening structure.

本発明における好適な実施の形態について、添付図面を参照しながら詳細に説明する。なお、以下に説明する実施の形態は、特許請求の範囲に記載された本発明の内容を限定するものではない。また、以下に説明される構成の全てが、本発明の必須要件であるとは限らない。各実施例では、従来とは異なる新規な屋上緑化構造を採用することにより、従来にない機能を付加した屋上緑化構造が得られ、その屋上緑化構造を夫々記述する。   Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, by adopting a new rooftop greening structure different from the conventional one, a rooftop greening structure with an unprecedented function is obtained, and the rooftop greening structure is described respectively.

以下、本発明の実施形態を添付図面を参照して説明する。図１〜図４は、本発明の実施例１を示し、同図に示すように、屋上緑化構造１は、屋上のコンクリート地２の表面に耐根シート３を敷設し、この耐根シート３の上に保護マット４，４を複数枚（２枚）敷設し、この保護マット４の上に、植生基盤５を設けてなる。一例として、耐根シート３と２枚の保護マット４，４を合わせた厚さが９.４ｍｍ、植物基盤５の厚さが５４ｍｍである。そして、その植物基盤５の上に野芝や高麗芝などの芝６を植える。尚、図中６Ａは芝６の根部分であり、土が付着している。   Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show Example 1 of the present invention. As shown in FIG. 1, the roof tree planting structure 1 has a root-resistant sheet 3 laid on the surface of a concrete surface 2 on the roof. A plurality of (two) protective mats 4, 4 are laid on the vegetation base, and a vegetation base 5 is provided on the protective mat 4. As an example, the total thickness of the root-resistant sheet 3 and the two protective mats 4 and 4 is 9.4 mm, and the thickness of the plant base 5 is 54 mm. Then, a grass 6 such as a wild grass or a Korean grass is planted on the plant base 5. In addition, 6A in a figure is a root part of the grass 6, and the soil has adhered.

前記植生基盤５は、粉砕したカキ殻と副材料たるパーライトとを混合してなり、カキ殻を５ｍｍ以下に粉砕し、下記の表１に示す粒度分布のものを用いた。   The vegetation base 5 was formed by mixing pulverized oyster shells and pearlite as a secondary material, pulverizing oyster shells to 5 mm or less, and having a particle size distribution shown in Table 1 below.

Figure 2010063409
上記のように、０．０７５ｍｍを通過しない割合が６．５重量％であり、これより大きな残りの９３．５重量％が砂分と対応する大きさとなる。したがって、粉砕したカキ殻は、５ｍｍを超えたものを含まず、５ｍｍ以下、０．０７５ｍｍ以上の割合が９３．５重量％以上とすることが好ましい。
Figure 2010063409
 As described above, the ratio of not passing 0.075 mm is 6.5% by weight, and the remaining 93.5% by weight larger than this is the size corresponding to the sand content. Accordingly, the crushed oyster shell does not include those exceeding 5 mm, and the ratio of 5 mm or less and 0.075 mm or more is preferably 93.5 wt% or more.

また、粉砕したカキ殻とパーライトとの配合比は、土性図などからカキ殻の上限を８５重量％以下とした。芝の生育にとって支障とならず、適切な配合になるように大・中・小の粒径が適切に分布したバランスが取れた配合になるように、粉砕したカキ殻とパーライトとを下記の表２に示す配合比とした。   Further, the blending ratio of the crushed oyster shell and pearlite was set so that the upper limit of the oyster shell was 85% by weight or less based on the soil map. The table below shows crushed oyster shells and pearlite so that they have a well-balanced formulation with appropriate distribution of large, medium, and small particle sizes so that they do not hinder turf growth. The blending ratio shown in FIG.

Figure 2010063409
この場合、カキ殻とパーライトとの配合比は、芝や草花の生育にとって、７０：３０〜８５：１５が好ましい。
Figure 2010063409
 In this case, the mixing ratio of oyster shell and pearlite is preferably 70:30 to 85:15 for the growth of turf and flowers.

保水性に関する実験を下記の要領で行った。尚、以下の実験などでは植物基盤５は、５ｍｍ以下に粉砕したカキ殻とパーライトとを８５：１５で混合したものを用いた。保護マット４を敷いた容器（縦×横：２６７ｍｍ×３８５ｍｍ）に、粉砕したカキ殻とパーライトとを混合した植生基盤５のサンプルを形成し、厚さは３７ｍｍとした。そのサンプルを２４時間水に浸した。この後、容器を２５度傾け、容器底部の排水穴から水が出なくなった時点を飽和重量として重量を測定した。次に、そのサンプルを乾燥炉に入れて乾燥し、適宜重量を測定し、重量変化がなくなった時点を絶乾温度として重量を測定した。これら測定結果から、保水量は、飽和重量から絶乾重量を引いた値であり、測定結果は飽和重量３１１１．７ｇ、絶乾重量１３７３．４ｇであり、保水量は１７３８．３ｇであった。サンプルの保水率は１２７％であり、１ｍ2当りの保水量は２１．２リットルとなった。一般土壌の有効水分量と最低基盤厚を基に、その保水量が１ｍ2当り１６リットル必要とするのに対し、これを上回る保水量を確保することができた。 The water retention experiment was conducted as follows. In the following experiments and the like, the plant substrate 5 was prepared by mixing oyster shells pulverized to 5 mm or less and pearlite at 85:15. A sample of the vegetation base 5 in which the crushed oyster shell and pearlite were mixed was formed in a container (length × width: 267 mm × 385 mm) on which the protective mat 4 was laid, and the thickness was 37 mm. The sample was immersed in water for 24 hours. Thereafter, the container was tilted by 25 degrees, and the weight was measured with the saturated weight as the point in time when water no longer came out from the drain hole at the bottom of the container. Next, the sample was put in a drying oven and dried, and the weight was measured as appropriate. The weight was measured with the time when the weight change disappeared as the absolutely dry temperature. From these measurement results, the water retention amount was a value obtained by subtracting the absolute dry weight from the saturated weight, the measurement results were a saturated weight of 311.7 g, an absolute dry weight of 1373.4 g, and a water retention amount of 1738.3 g. The water retention rate of the sample was 127%, and the water retention amount per 1 m 2 was 21.2 liters. Based on the effective moisture content of the general soil and the minimum base thickness, the water retention amount required 16 liters per 1 m 2 , whereas the water retention amount exceeding this was ensured.

一般的に屋上緑化基盤として使用される軽量土壌と、前記植生基盤５との耐乾燥性について比較実験を行った。保護マット４を敷いた２つの容器（縦×横：２６７ｍｍ×３８５ｍｍ）を用意し、一方の容器に、粉砕したカキ殻とパーライトとを混合した植生基盤５のサンプルを形成し、厚さは３７ｍｍとした。比較用として、他方の容器に、一般的な屋上緑化材として用いられる軽量土壌を入れたサンプルを形成し、同様に厚さは３７ｍｍとし、保水性を比較した。実験は、サンプルを乾燥炉で絶乾状態にした後に１４３ミリリットルの同量の水を入れ、１２時間置いてから、３０°Ｃの乾燥炉に入れて時間毎のサンプル重量を測定して蒸発量を算出した。   A comparative experiment was conducted on drought resistance between a light soil generally used as a rooftop greening base and the vegetation base 5. Prepare two containers (length x width: 267 mm x 385 mm) with a protective mat 4, and form a sample of the vegetation base 5 in which one of the crushed oyster shells and perlite is mixed, and the thickness is 37 mm. It was. For comparison, a sample in which lightweight soil used as a general rooftop greening material was placed in the other container was formed. Similarly, the thickness was 37 mm and water retention was compared. In the experiment, after the sample was completely dried in a drying furnace, 143 ml of the same amount of water was added and left for 12 hours. Then, the sample was placed in a drying furnace at 30 ° C., and the amount of evaporation was measured by measuring the weight of the sample every hour. Was calculated.

その結果を図２に示す。これにより、植物基盤５が軽量土壌より保水性・耐乾燥性が高いことが分かる。   The result is shown in FIG. Thereby, it turns out that the plant base 5 has higher water retention and drought resistance than light soil.

耐乾燥性確認実験として、植物基盤５を飽和状態にし、真夏日を想定した３０°Ｃの乾燥炉に入れ、適宜重量を測定し、夏季晴天時の耐乾燥性に対する確認実験を実施した。測定の結果、乾燥状態になるまで約９日間を要した。この実験から、夏期の散水頻度は１回／週程度まで省力化できると考えられる。   As a drought resistance confirmation experiment, the plant base 5 was saturated, placed in a 30 ° C. drying oven assuming a midsummer day, and the weight was measured appropriately, and a confirmation experiment for drought resistance during summer sunny weather was performed. As a result of the measurement, it took about 9 days to become dry. From this experiment, it is considered that the watering frequency in summer can be reduced to about once / week.

また、２つの屋上緑化構造１，１を近接して配置し、それら屋上緑化構造１，１の一方を「フィールド１」、他方を「フィールド２」として、図３のグラフの縦軸に水分量を示し、横軸は測定日である。尚、この屋上緑化構造１では、植生基盤５の上に芝６を植えている。フィールド１では２日に１回散水したのに対し、フィールド２においては５日間程度散水を行わなかったが、水分量に大きな差は出なかった。また、観察の結果、生育状態に大きな違いはなく、室内実験での乾燥性の結果と同様に１週間程度無散水でも生育は可能であることが確認できた。また、温度上昇の抑制効果については、気温３４．３°Ｃでコンクリート地２は５１．５°Ｃ間で上昇したが、芝６の表面温度は４０．１°Ｃであった。これは芝の蒸散効果による温度低下であり、ヒートアイランド現象を抑制する効果が得られた。また、同時に植生基盤５の下の温度は３０．５°Ｃであり、コンクリート地２に比べて２０°Ｃ以上も低く、且つ一日中、３０°Ｃ前後に安定していた。これは芝と植生基盤５とによる断熱効果によるものであり、省エネルギー効果が確認できた。   In addition, two rooftop greening structures 1 and 1 are arranged close to each other, one of the rooftop greening structures 1 and 1 is “field 1” and the other is “field 2”, and the vertical axis of the graph of FIG. The horizontal axis represents the measurement date. In this rooftop greening structure 1, turf 6 is planted on vegetation base 5. Water was sprayed once every two days in field 1, whereas water was not sprayed for about 5 days in field 2, but there was no significant difference in water content. As a result of observation, it was confirmed that there was no significant difference in the growth state, and that it was possible to grow even with non-watering for about one week, similarly to the result of the drying property in the laboratory experiment. Moreover, about the inhibitory effect of a temperature rise, although the concrete temperature 2 rose between 51.5 degreeC by the temperature of 34.3 degreeC, the surface temperature of the turf 6 was 40.1 degreeC. This was a temperature drop due to the transpiration effect of the turf, and the effect of suppressing the heat island phenomenon was obtained. At the same time, the temperature under the vegetation base 5 was 30.5 ° C., which was lower than 20 ° C. compared to the concrete ground 2 and was stable at around 30 ° C. throughout the day. This was due to the heat insulation effect of the turf and the vegetation base 5, and an energy saving effect was confirmed.

次に、酸性雨に対する効果を確認する実験を行った。ネット状の袋に入れたカキ殻を、水槽に入れ、ｐＨ（水素イオン濃度）４．７５の酸性水を水槽に満たし、ポンプにより酸性水を循環させ、時間毎のｐＨを測定した。この結果を図４に示す。結果として、３０分程度で酸性水が弱酸性まで中和された。   Next, an experiment was conducted to confirm the effect on acid rain. Oyster shells placed in a net-like bag were placed in a water tank, filled with acidic water having a pH (hydrogen ion concentration) of 4.75, the acidic water was circulated by a pump, and the pH for each hour was measured. The result is shown in FIG. As a result, acidic water was neutralized to weak acidity in about 30 minutes.

また、前記フィールド１及びフィールド２を用いた屋外実験では、ｐＨ５．５３の降雨が植生基盤５を通過することにより、ｐＨ６．６２に中和されることが確認できた。   Moreover, in the outdoor experiment using the said field 1 and the field 2, it was confirmed that the rainfall of pH 5.53 is neutralized to pH 6.62 by passing through the vegetation base 5.

尚、副材料には、パーライト以外に、所定の保水性と貝殻角部の緩衝作用が得られるものであれば、バーミキュライト，バーク，木質チップ，粉砕した軽石、ピートやミズゴケなどを用いることができる。   In addition to the pearlite, vermiculite, bark, wood chips, crushed pumice, peat, sphagnum, etc. can be used as the secondary material as long as the predetermined water retention and buffering action of the shell corner can be obtained. .

また、カキ殻以外に各種の貝殻を用いることができる。尚、リサイクル性を考慮した場合、代表的な貝殻には、カキ殻とホタテ貝殻が上げられるが、屋上緑化としては、荷重の制限条件から両者を比較する。   Various shells other than the oyster shells can be used. In consideration of recyclability, oyster shells and scallop shells can be raised as typical shells, but for rooftop greening, both are compared based on load limiting conditions.

Figure 2010063409
上記表３に示すように、カキ殻の最大粒径５ｍｍに対し、ホタテ貝殻は最大７５ｍｍであるが、粒径が小さくなると、密度が増して単位体積重量が増加する。最大粒径が小さくても、カキ殻の単位体積重量はホタテ殻より軽量であるから、同粒径の場合、さらにカキ殻が軽量となる。
Figure 2010063409
 As shown in Table 3 above, scallop shells have a maximum particle size of 75 mm, whereas oyster shells have a maximum particle size of 5 mm. However, as the particle size decreases, the density increases and the unit volume weight increases. Even if the maximum particle size is small, the unit volume weight of the oyster shell is lighter than that of the scallop shell.

このように本実施例では、請求項１に対応して、屋上に植生基盤を設けた屋上緑化構造において、植生基盤５に粉砕した貝殻を混合したから、粉砕した貝殻を用いることにより、軽量化が可能となると共に、貝殻の比表面積を増大させ、保水能力と施肥保留能力を向上することができる。また、混合した貝殻により、酸性雨を中和する機能を備えたものになる。   As described above, in this embodiment, in accordance with claim 1, in the roof tree planting structure in which the vegetation base is provided on the roof, the crushed shell is mixed with the vegetation base 5, so that the weight is reduced by using the crushed shell. In addition, the specific surface area of the shell can be increased and the water retention capacity and fertilization retention capacity can be improved. Moreover, the mixed shell makes it possible to neutralize acid rain.

また、このように本実施例では、請求項２に対応して、貝殻がカキ殻であるから、多孔質なカキ殻を粉砕することにより、カキ殻の比表面積を増大させ、保水能力と施肥保留能力を向上する。そして、水産業で大量発生しているカキ殻を廃棄処分することなく、有効にリサイクルすることができ、また、カキ殻は軽量であるから、屋上緑化の植生基盤として好ましい。   In this way, in this embodiment, the shell is an oyster shell corresponding to claim 2, so that the specific surface area of the oyster shell is increased by pulverizing the porous oyster shell, so that the water retention capacity and fertilizer application are increased. Improve holding capacity. The oyster shells generated in large quantities in the fishery industry can be effectively recycled without being disposed of, and the oyster shells are light in weight, which is preferable as a vegetation base for rooftop greening.

また、このように本実施例では、請求項３に対応して、植生基盤５に副材料たるパーライトを混合したから、カキ殻を粉砕すると、角部を有する角張る形状となるため、維持管理などで人が載った場合、植物の根に悪影響を与える虞があるが、副材料を混合することにより角部による悪影響を防止することができる。   In this way, in this embodiment, corresponding to claim 3, since pearlite, which is a secondary material, is mixed with the vegetation base 5, when the oyster shell is crushed, the vegetation shell has an angular shape with corners, so that it is maintained and managed. When a person is placed on the plant, there is a risk of adversely affecting the roots of the plant. However, the adverse effects due to the corners can be prevented by mixing the auxiliary materials.

また、このように本実施例では、請求項４に対応して、カキ殻が５ｍｍ以下に粉砕されたものであるから、５ミリ以下に粉砕することにより、砂と同様な大きさとなる。   In this way, in this example, the oyster shell was pulverized to 5 mm or less in correspondence with the fourth aspect, so that it becomes the same size as sand by pulverizing to 5 mm or less.

また、このように本実施例では、請求項５に対応して、植生基盤５の単位面積当たりの重量が６０kg/ｍ2以下であるから、軽量な屋上緑化構造となる。 In this way, in this embodiment, corresponding to claim 5, the weight per unit area of the vegetation base 5 is 60 kg / m 2 or less, so that a light rooftop greening structure is obtained.

また、実施例上の効果として、粉砕したカキ殻を単体１００％の配合ではなく、パーライトなどを副材料として配合することにより、パーライトなどの副材料は非常に軽量で多孔質な特徴から芝の根腐れ防止や補完的な保水を確保できる。そして、パーライトなどの副材料は軽量であり、施工においては、飛散防止等の対策が必要であるが、粉砕したカキ殻と混合することにより馴染みがよく飛散せずに施工が可能となる。また、カキ殻を粉砕したため、粒径が角張っていることから、維持管理で人が載った場合、芝の根が切れる懸念があるが、丸みを帯びたパーライトなどの副材料と混合することにより、根が切れる懸念が解消される。また、植生基盤５の保水量が１ｍ2当り１６リットル以上であるから、芝や草花に必要な保水量を確保することができる。また、カキ殻を洗浄し、乾燥した後、粉砕したから、衛生的に優れたものとなる。 In addition, as an effect on the embodiment, pulverized oyster shell is not blended with 100% alone, but pearlite is blended as a subsidiary material, so that the subsidiary material such as pearlite is very lightweight and has a porous feature. Prevent root rot and ensure complementary water retention. The auxiliary material such as pearlite is lightweight, and it is necessary to take measures such as prevention of scattering in the construction. However, by mixing with the crushed oyster shell, the construction can be performed without being scattered well. In addition, because the oyster shell is crushed, the particle size is square, so there is a concern that the grass roots may be cut if a person is placed on maintenance, but by mixing with a secondary material such as rounded pearlite , The fear of cutting roots is resolved. Moreover, since the water retention amount of the vegetation base 5 is 16 liters or more per 1 m 2 , the water retention amount necessary for turf and flowers can be ensured. Further, since the oyster shell is washed, dried and pulverized, it is excellent in hygiene.

なお、本発明は、前記実施例に限定されるものではなく、種々の変形実施が可能である。例えば、アサリ、シジミ、ホタテ、ハマグリ、サザエ等種々の貝殻を用いることができる。   In addition, this invention is not limited to the said Example, A various deformation | transformation implementation is possible. For example, various shells such as clams, swordfish, scallops, clams, and turban shells can be used.

本発明の実施例１を示す全体断面図である。It is a whole sectional view showing Example 1 of the present invention. 同上、保水性の比較実験のグラフ図である。It is a graph figure of the comparative experiment of water retention same as the above. 同上、屋外における水分量の変化を示すグラフ図である。It is a graph which shows the change of the moisture content outdoors same as the above. 同上、酸性雨中和効果を説明するグラフ図である。It is a graph explaining the acid rain neutralization effect same as the above.

符号の説明Explanation of symbols

１ 屋上緑化構造
５ 植物基盤
６ 芝 1 Rooftop greening structure 5 Plant base 6 Turf

Claims (5)

屋上に植生基盤を設けた屋上緑化構造において、前記植生基盤に粉砕した貝殻を混合したことを特徴とする屋上緑化構造。 A rooftop greening structure in which a vegetation base is provided on a rooftop, and a crushed shell is mixed with the vegetation base. 前記貝殻がカキ殻であることを特徴とする請求項１記載の屋上緑化構造。 The roof tree planting structure according to claim 1, wherein the shell is an oyster shell. 前記植生基盤に副材料を混合したことを特徴とする請求項２記載の屋上緑化構造。 The rooftop greening structure according to claim 2, wherein a subsidiary material is mixed in the vegetation base. 前記カキ殻が５ｍｍ以下に粉砕されたものであることを特徴とする請求項２又は３記載の屋上緑化構造。 The roof greening structure according to claim 2 or 3, wherein the oyster shell is pulverized to 5 mm or less. 前記植生基盤の単位面積当たりの重量が６０kg/ｍ2以下であることを特徴とする請求項４記載の屋上緑化構造。 The rooftop greening structure according to claim 4, wherein the weight per unit area of the vegetation base is 60 kg / m 2 or less.
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Citations (4)

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Publication number Priority date Publication date Assignee Title
JPH1056877A (en) * 1996-08-16 1998-03-03 Toko Kensetsu Kk Base material for growing plants and slope greening method
JP2002360068A (en) * 2001-06-06 2002-12-17 Toho Kogyo Kk Growing bed for horticulture
JP2005042526A (en) * 2003-07-25 2005-02-17 Kazutoshi Igarashi Method for utilizing hardly rotting plant material for urban planting and warming countermeasure
JP2006006254A (en) * 2004-06-29 2006-01-12 Mie Prefecture Soil improving material and seedling compost

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1056877A (en) * 1996-08-16 1998-03-03 Toko Kensetsu Kk Base material for growing plants and slope greening method
JP2002360068A (en) * 2001-06-06 2002-12-17 Toho Kogyo Kk Growing bed for horticulture
JP2005042526A (en) * 2003-07-25 2005-02-17 Kazutoshi Igarashi Method for utilizing hardly rotting plant material for urban planting and warming countermeasure
JP2006006254A (en) * 2004-06-29 2006-01-12 Mie Prefecture Soil improving material and seedling compost

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