JP5040011B2 - Water retention mat for vegetation and structure of vegetation board using the same - Google Patents

Water retention mat for vegetation and structure of vegetation board using the same Download PDF

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JP5040011B2
JP5040011B2 JP2005271536A JP2005271536A JP5040011B2 JP 5040011 B2 JP5040011 B2 JP 5040011B2 JP 2005271536 A JP2005271536 A JP 2005271536A JP 2005271536 A JP2005271536 A JP 2005271536A JP 5040011 B2 JP5040011 B2 JP 5040011B2
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water
vegetation
expansion
absorbing
mat
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JP2007082409A (en
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宏之 桝井
昇司 平尾
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東拓工業株式会社
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この発明は、芝生その他の植物を植生した植生層の裏面側に敷き込まれる植生用保水マット及びこれを使用した植生地盤の構造に関するものである。   TECHNICAL FIELD The present invention relates to a vegetation water retention mat laid on the back side of a vegetation layer on which lawns and other plants have been vegetated, and a structure of a vegetation board using the vegetation retention board.
芝生や花壇等に植えた植物への水遣りは、面倒で手間のかかる作業であり、特に夏の渇水時などにおいては、暑くて大変な作業となり、また水源の確保が必要で、水の使用量も多くなって維持コストも嵩むといった問題がある。   Watering plants planted on lawns, flower beds, etc. is a cumbersome and time-consuming task, especially in the case of drought in summer, which is a hot and difficult task, and it is necessary to secure a water source. However, there is a problem that the maintenance cost increases.
そこで、芝生等を植生した植生層の裏面側に保水層を設けて、水遣り作業等を軽減するといった試みがなされている。(例えば、特許文献1参照。)   Therefore, an attempt has been made to reduce the watering work by providing a water retention layer on the back side of the vegetation layer on which lawn or the like is vegetated. (For example, see Patent Document 1)
この種の保水層に用いられる保水材料としては、培養土等の土壌材、不織布、スポンジ等が挙げられるが、いずれも吸水能力が十分ではなく、依然として水遣り作業が必要となることが多く、水遣り作業の頻度を大幅に軽減するには至らなかった。   Examples of the water retention material used for this type of water retention layer include soil materials such as culture soil, non-woven fabrics, sponges, etc., all of which have insufficient water absorption capacity and still require watering work. The frequency of work has not been greatly reduced.
近年では、自重の数百倍もの水を吸収し、保持する能力を有する吸水性ポリマーが研究開発されて、植生用の保水材料としても利用されるようになってきている。
特開2000−4679号公報
In recent years, a water-absorbing polymer having the ability to absorb and retain water several hundred times its own weight has been researched and developed and used as a water retention material for vegetation.
JP 2000-4679 A
しかしながら、上記のような吸水性ポリマーを備えた保水層を、芝生等を植生した植生層の裏面側に単に敷き込んだ場合、吸水性ポリマーが水を吸って膨張する空間がないため、保水量が制限されたり、また吸水性ポリマーが膨張したとしても、その膨張圧によって植生層が押し上げられて、芝生面(地表面)が要所要所で盛り上がって凹凸を生じるといった問題があった。   However, when the water retention layer provided with the water-absorbing polymer as described above is simply laid on the back side of the vegetation layer on which lawn or the like is vegetated, there is no space for the water-absorbing polymer to absorb water and expand, However, even if the water-absorbing polymer expands, the vegetation layer is pushed up by the expansion pressure, and there is a problem that the lawn surface (the ground surface) rises up at the necessary place to cause unevenness.
この発明は、上記従来の欠点を解決するためになされたものであって、その目的は、吸水性及び保水性に優れた吸水性ポリマー等の吸水膨張体を使用して、水遣り作業の大幅な軽減及び節水を図りながら、しかも吸水膨張体の吸水時の膨張による地表面への悪影響を防止することができる植生用保水マット及びこれを使用した植生地盤の構造を提供することである。   The present invention has been made in order to solve the above-described conventional drawbacks, and its purpose is to use a water-absorbing expander such as a water-absorbing polymer excellent in water absorption and water retention to greatly reduce watering work. It is intended to provide a water retention mat for vegetation and a structure of a vegetation board using the same, capable of reducing and saving water while preventing an adverse effect on the ground surface due to expansion of the water absorbing expansion body during water absorption.
上記課題を解決するため、この発明の植生用保水マット1は、水を吸収して膨張する吸水性ポリマーを主素材とする不織布からなる吸水膨張体4と、その吸水膨張体4の膨張部分が入り込む膨張吸収空間Sを形成する保形体5とが積層され、芝生その他の植物を植生した植生層30とその下側の土壌層31との間に、前記吸水膨張体4が上側、前記保形体5が下側となるように敷き込まれるものであって、前記保形体5は、複数の樹脂製の波状部材11・・を同一平面上に間隔をあけて並設してなり、それら波状部材11・・の凹部15・・及び波状部材11・・間の隙間が前記膨張吸収空間Sとされていることを特徴とする。 In order to solve the above problems, a vegetation retention mat 1 of the present invention includes a water absorbent expansion body 4 made of a nonwoven fabric mainly composed of a water absorbent polymer that absorbs water and expands, and an expansion portion of the water absorption expansion body 4. The shape-retaining body 5 that forms the expansion absorption space S to enter is laminated, and the water-absorbing expansion body 4 is located between the vegetation layer 30 in which lawns and other plants are vegetated and the soil layer 31 below the vegetation layer 30. 5. The shape retaining body 5 is formed by arranging a plurality of resin-like corrugated members 11... On the same plane in parallel with each other, and these corrugated members 5 are laid on the same plane. 11. The space between the concave portions 15 of the corrugated members 15 and the corrugated members 11 is formed as the expansion absorption space S.
具体的に、前記吸水膨張体4には、感温吸排水性樹脂10が混入されている。 Specifically, wherein the hygroscopic expansion member 4, the temperature-sensitive intake aqueous resin 10 are mixed.
さらに、一対の透水シート体3、3を備え、これら透水シート体3、3間に前記吸水膨張体4及び保形体5が挟み込まれている。   Furthermore, a pair of water-permeable sheet bodies 3 and 3 are provided, and the water-absorbing and expanding body 4 and the shape retaining body 5 are sandwiched between the water-permeable sheet bodies 3 and 3.
また、前記保形体5の一部を覆うようにして前記吸水膨張体4を配置することで、マット1全面において保水領域20と排水領域21、21が形成されている。   Further, by arranging the water absorbing and expanding body 4 so as to cover a part of the shape retaining body 5, a water retaining area 20 and drainage areas 21 and 21 are formed on the entire surface of the mat 1.
さらにまた、前記保形体5の略全面を覆うようにして前記吸水膨張体4を配置することで、マット1略全面に亘って保水領域20が形成されている。   Furthermore, the water retention area 20 is formed over the substantially entire surface of the mat 1 by disposing the water absorbing / expanding body 4 so as to cover substantially the entire surface of the shape retaining body 5.
さらに、上記のマット1は、例えば湾曲させたり屈曲させたりすることが可能な可撓性を有している。   Further, the mat 1 has flexibility that can be bent or bent, for example.
さらに、この発明の植生地盤の構造は、上記構成の植生用保水マット1を、芝生その他の植物を植生した植生層30とその下側の土壌層31との間に敷き込んでなることを特徴とする。 Furthermore, the structure of the vegetation board according to the present invention is characterized in that the vegetation water retention mat 1 having the above-described configuration is laid between a vegetation layer 30 on which lawns and other plants are vegetated and a lower soil layer 31. And
この発明の植生用保水マットを植生層とその下側の土壌層との間に敷き込んだ植生地盤においては、降雨によって植生層からマットへ雨水が浸透して、吸水性ポリマーを主素材とする不織布からなる吸水膨張体が雨水を吸収して膨張しても、その膨張部分が保形体の膨張吸収空間に入り込んで、マットの全体形状は、吸水膨張体の雨水吸収前とほぼ同じでほとんど変化しない。このため、吸水膨張体が膨張しても、植生層を押し上げることがなく、地表面には吸水膨張体の膨張に伴う凹凸が生じることがない。 In the vegetation board in which the water retention mat for vegetation according to the present invention is laid between the vegetation layer and the lower soil layer , rainwater permeates from the vegetation layer to the mat due to rain, and the water-absorbing polymer is the main material. Even if the water-absorbing expansion body made of non-woven fabric absorbs rainwater and expands, the expanded portion enters the expansion absorption space of the shape retention body, and the overall shape of the mat is almost the same as before the water absorption expansion body absorbs rainwater. do not do. For this reason, even if a water absorption expansion body expand | swells, a vegetation layer is not pushed up and the unevenness | corrugation accompanying expansion | swelling of a water absorption expansion body does not arise in the ground surface.
従って、吸水性及び保水性に優れた吸水膨張体を使用して、水遣り作業の大幅な軽減及び節水を図りながら、地表面への悪影響を防止することができる。 Therefore, it is possible to prevent adverse effects on the ground surface while significantly reducing watering work and saving water by using a water-absorbing expander excellent in water absorption and water retention.
また、吸水膨張体に感温吸排水性樹脂を混入させることで、地温が低いときには水を吸収して保持し、地温が高くなると水を自動的に排出させることができ、これによって植生層の植物に対して効率の良い水供給が可能となり、また植物の根腐れ等も防止することができる。   In addition, by mixing the temperature-absorbing and drainage resin into the water-absorbing expansion body, water can be absorbed and retained when the ground temperature is low, and water can be automatically discharged when the ground temperature is high. Efficient water supply to the plant is possible, and root decay of the plant can be prevented.
さらに、複数の樹脂製の波状部材を同一平面上に間隔をあけて並設して保形体を構成することで、保形体の構造を簡単にして、マットの製造工程の簡略化を図ることができる。しかも、波状部材によって耐圧扁平強度を高めることができ、植生層によってマットが押し潰されることなく、膨張吸収空間を長期に亘って安定して確保して、信頼性の向上を図ることができる。   Furthermore, by forming a shape retaining body by arranging a plurality of resin wave-shaped members side by side on the same plane, the structure of the shape retaining body can be simplified and the mat manufacturing process can be simplified. it can. Moreover, the pressure-resistant flat strength can be increased by the wavy member, and the expansion absorption space can be secured stably over a long period of time without the mat being crushed by the vegetation layer, thereby improving the reliability.
また、透水シート体間に吸水膨張体及び保形体を挟み込んでいるので、マット内部への雨水の浸透を許容しながら、吸水膨張体の膨張吸収空間への土や小石等の異物の入り込みをなくすことができる。これによって、膨張吸収空間を長期に亘って安定して確保して、信頼性の向上を図ることができる。   Moreover, since the water-absorbing expansion body and the shape-retaining body are sandwiched between the water-permeable sheet bodies, entry of foreign matter such as soil and pebbles into the expansion absorption space of the water-absorbing expansion body is eliminated while allowing rainwater to penetrate into the mat. be able to. As a result, the expansion absorption space can be secured stably over a long period of time, and the reliability can be improved.
さらに、マット全面において保水領域と排水領域を形成することで、例えば梅雨時期等において大量に降雨があった際には、排水領域を通じて余剰分の雨水を植生地盤から速やかに排出させることができ、植生層の植物の根腐れ等を防止することができる。   Furthermore, by forming a water retention area and a drainage area on the entire surface of the mat, when there is a large amount of rain during the rainy season, for example, excess rainwater can be quickly discharged from the vegetation board through the drainage area. It can prevent root rot of plants in the vegetation layer.
さらにまた、マット略全面に亘って保水領域を形成することで、マットの保水能力を高めることができ、特に渇水が頻繁に起こり得る植生地盤への適用に有効である。   Furthermore, by forming a water retention area over the entire surface of the mat, the water retention capacity of the mat can be increased, and it is particularly effective for application to a vegetation board where drought can occur frequently.
また、マットが可撓性を有していると、例えば工場出荷の際等にはマットをコイル状に巻いて梱包することができ、また現場においては植生地盤の形状等に追従させた柔軟な敷き込みが可能となるといったように、マットの取り扱いが容易になる。   In addition, if the mat has flexibility, it can be wound in a coil shape and packed, for example, at the time of shipment from the factory. The mat can be handled easily so that it can be laid.
次に、この発明の実施の形態について、図面を参照しつつ詳細に説明する。図1は、この発明の一実施形態に係る植生用保水マットの分解斜視図、図2は植生用保水マットの斜視図である。   Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an exploded perspective view of a water retention mat for vegetation according to an embodiment of the present invention, and FIG. 2 is a perspective view of the water retention mat for vegetation.
植生用保水マット1は、図1及び図2に示すように、一対の透水シート体3、3と、水を吸収して膨張する吸水膨張体4と、マット1の耐圧扁平強度を維持する保形体5とを備えている。そして、吸水膨張体4と保形体5とが積層された状態で、一対の透水シート体3、3によって挟み込まれている。   As shown in FIG. 1 and FIG. 2, the vegetation water retention mat 1 includes a pair of water permeable sheet bodies 3 and 3, a water absorbent expansion body 4 that absorbs and expands water, and a pressure retaining flatness strength of the mat 1. And a shape 5. And it is inserted | pinched by a pair of water-permeable sheet bodies 3 and 3 in the state in which the water absorption expansion body 4 and the shape-retaining body 5 were laminated | stacked.
透水シート体3は、図3に示すように、縦テープ状素材6・・と、横テープ状素材7・・とを平織りにて織り合わせて、多数の水透過孔8・・を有する例えば15〜20メッシュのネット状に形成されている。テープ状素材6、7・・としては、ポリエチレン、ポリプロピレン、ポリアミド等の延伸処理を施した抗張力を有する熱可塑性合成樹脂等を使用することができる。   As shown in FIG. 3, the water-permeable sheet body 3 has a large number of water-permeable holes 8..., For example, by weaving vertical tape-shaped materials 6. It is formed in a net shape of ˜20 mesh. As the tape-like materials 6, 7,..., Thermoplastic synthetic resins having tensile strength such as polyethylene, polypropylene, polyamide, etc., which have been subjected to stretching treatment, can be used.
吸水膨張体4は、例えば吸水性及び保水性に優れた高吸水性ポリマーを主素材とする帯状の不織布からなり、自重の数百倍もの水を吸収して膨張し、その吸収した水を保持する能力を有している。高吸水性ポリマーは、イオン性を有する基をもった水溶性の電解質ポリマーに、軽度の架橋結合を導入した3次元網目構造のものであり、例えばポリビニルアルコール系、アクリル系、ポリエーテル系等の合成高分子類、或いは、デンプン系、セルロース系等の天然高分子類を原料とするものが用いられている。   The water-absorbing expansion body 4 is made of a strip-shaped nonwoven fabric mainly composed of a highly water-absorbing polymer having excellent water absorption and water retention, and absorbs and absorbs water several hundred times its own weight, and retains the absorbed water. Have the ability to The superabsorbent polymer has a three-dimensional network structure in which a mild cross-linking bond is introduced into a water-soluble electrolyte polymer having an ionic group, such as polyvinyl alcohol, acrylic, and polyether. Synthetic polymers, or starches, celluloses and other natural polymers are used as raw materials.
そして、この吸水膨張体4には、感温吸排水性樹脂10が混入されている。この感温吸排水性樹脂10は、温度が低いときに水を樹脂中に吸収して、温度が上昇して感温点に達すると水を排出するもので、例えば商品名「サーモゲル」として市販されているものが用いられている。なお、この感温吸排水性樹脂10は、必ずしも吸水膨張体4に混入させる必要はないが、混入させることによって、植物の育成により有効な吸排水機能を発揮させることができる。   The water-absorbing expansion body 4 is mixed with a temperature-sensitive water-absorbing and draining resin 10. This temperature-absorbing and draining resin 10 absorbs water into the resin when the temperature is low, and discharges water when the temperature rises and reaches the temperature-sensitive point. For example, it is commercially available under the trade name “Thermogel”. What is being used is used. In addition, although it is not always necessary to mix this temperature-sensitive water-absorbing and draining resin 10 into the water-absorbing expansion body 4, it is possible to exhibit an effective water-absorbing and draining function by growing plants.
保形体5は、図1及び図4に示すように、複数の樹脂製の波状部材11・・を同一平面上に間隔をあけて並設することによって構成され、吸水膨張体4の下側に配置されている。波状部材11は、所定ピッチに配設される上横辺部12・・と、所定ピッチに配設される下横辺部13・・と、上横辺部12と下横辺部13とを連結する縦辺部14・・とからなり、上方に開口する凹部15・・と、下方に開口する凹部16・・とが長手方向に沿って交互に配置されている。なお、この波状部材11は、例えばポリエチレン、ポリプロピレン等の熱可塑性樹脂を素材として押出成形等にて形成されている。   As shown in FIGS. 1 and 4, the shape-retaining body 5 is configured by arranging a plurality of resin-like corrugated members 11... Has been placed. The corrugated member 11 includes an upper horizontal side portion 12 arranged at a predetermined pitch, a lower horizontal side portion 13 arranged at a predetermined pitch, an upper horizontal side portion 12 and a lower horizontal side portion 13. Consists of connecting vertical side portions 14..., Recesses 15... Opened upward and recesses 16 .. opening downward are alternately arranged along the longitudinal direction. The corrugated member 11 is formed by extrusion molding or the like using a thermoplastic resin such as polyethylene or polypropylene as a material.
この保形体5においては、植生層30等の重圧に耐え得る耐圧扁平強度を有している。すなわち、重圧に対する圧潰を防ぐために、波状部材11の肉厚寸法T(図4参照)に対する幅寸法W(図1参照)、波のピッチP(図4参照)が釣り合っていることが必要で、肉厚寸法Tを薄くした場合や波のピッチPを大きくすれば耐圧強度が低下する。また、肉厚寸法Tを厚くすればコスト高となる。このため、使用する材質によって相違するが、例えば、ポリエチレン樹脂等を使用した場合には、各波状部材11の肉厚寸法Tを0.5〜1.5mm程度、幅寸法Wを5〜20mm程度、波のピッチPを5〜20mm程度、波の高さHを10mm程度とするのが好ましい。   The shape retaining body 5 has a flattening strength that can withstand the heavy pressure of the vegetation layer 30 and the like. That is, in order to prevent crushing due to heavy pressure, it is necessary that the width dimension W (see FIG. 1) and the wave pitch P (see FIG. 4) are balanced with respect to the thickness T (see FIG. 4) of the corrugated member 11. When the wall thickness dimension T is reduced or the wave pitch P is increased, the pressure resistance decreases. Further, if the thickness T is increased, the cost is increased. For this reason, although it changes with materials used, for example, when polyethylene resin etc. are used, the thickness dimension T of each corrugated member 11 is about 0.5-1.5 mm, and the width dimension W is about 5-20 mm. The wave pitch P is preferably about 5 to 20 mm, and the wave height H is preferably about 10 mm.
そして、この保形体5の各波状部材11・・の凹部15・・及び波状部材11・・間の隙間によって、膨張吸収空間Sが構成されており、この膨張吸収空間Sに、吸水時の吸水膨張体4における膨張部分が入り込むようになっている。   And the expansion absorption space S is comprised by the clearance gap between each wavelike member 11 ... of this shape-retaining body 5 ..., and the wavelike member 11, ..., The water absorption at the time of water absorption is comprised in this expansion absorption space S The expansion part in the expansion body 4 enters.
次に、上記植生用保水マット1の製造方法を説明する。まず、多数の波状部材11・・を同一平面上に間隔をあけて互いに平行に配列して保形体5を構成し、この保形体5を一方の透水シート体3の上に載置して、両者の接触部分を融着固定する。   Next, a method for manufacturing the vegetation water retention mat 1 will be described. First, a large number of undulating members 11... Are arranged in parallel to each other at intervals on the same plane to form a shape retaining body 5, and this shape retaining body 5 is placed on one water-permeable sheet body 3, Both contact portions are fusion-fixed.
続いて、保形体5の上に吸水膨張体4を載置するとともに、この吸水膨張体4を覆うように他方の透水シート体3を載置する。このとき、吸水膨張体4は、図1及び図2に示すように、その幅方向の寸法が透水シート体3、3や保形体5の幅方向の寸法よりも小さく設定されており、保形体5の幅方向中央部を覆うようにして長手方向に連続して配置されている。   Subsequently, the water absorbent expansion body 4 is placed on the shape retaining body 5 and the other water permeable sheet body 3 is placed so as to cover the water absorbent expansion body 4. At this time, as shown in FIGS. 1 and 2, the water-absorbing expansion body 4 is set such that the dimension in the width direction is smaller than the dimension in the width direction of the water-permeable sheet bodies 3 and 3 and the shape retaining body 5. 5 is continuously arranged in the longitudinal direction so as to cover the center portion in the width direction.
そして、保形体5の両端部と他方の透水シート体3の両端部の接触部分、さらに場合によっては透水シート体3、3の両端部同士を融着固定することで、内部に吸水膨張体4が収納された上記の植生用保水マット1を形成することができる。なお、上記植生用保水マット1は長尺体として製造され、現場の状況等に応じて所定寸法に切断されて使用されるようになっている。   And the water absorbing / expanding body 4 is internally fixed by fusing and fixing the contact portions of both ends of the shape retaining body 5 and both ends of the other water-permeable sheet body 3 and, in some cases, both ends of the water-permeable sheet bodies 3 and 3. The above-mentioned water retention mat 1 for vegetation can be formed. The vegetation water retention mat 1 is manufactured as an elongated body, and is used after being cut into a predetermined dimension according to the situation at the site.
この植生用保水マット1においては、保形体5の中央部を覆うようにして吸水膨張体4が配置されているので、図2に示すように、マット1全面において、その中央部に保水領域20が形成され、その両端部に吸水膨張体4が存在しない排水領域21、21が形成されている。   In the water retention mat 1 for vegetation, the water absorbing / expanding body 4 is disposed so as to cover the center portion of the shape retaining body 5, and therefore, as shown in FIG. Are formed, and drainage regions 21 and 21 where the water-absorbing expansion body 4 does not exist are formed at both ends thereof.
なお、吸水膨張体4は、必ずしも保形体5の中央部を覆うように配置する必要はなく、例えば図6に示すように、保形体5の略全面を覆うようにして配置しても良い。この場合、マット1の略全面に亘って保水領域20が形成され、保水性を高めることができる。さらに、複数の吸水膨張体4・・を所定の間隔をあけて配置することで、排水領域21・・を増やして、排水性を高めるようにしても良い。   The water absorbing / expanding body 4 does not necessarily need to be disposed so as to cover the central portion of the shape retaining body 5, and may be disposed so as to cover substantially the entire surface of the shape retaining body 5, for example, as shown in FIG. 6. In this case, the water retention area | region 20 is formed over the substantially whole surface of the mat 1, and water retention can be improved. Furthermore, by disposing a plurality of water-absorbing expansion bodies 4... At a predetermined interval, the drainage area 21...
また、この植生用保水マット1では、保形体5が間隔をあけて配置した複数の波状部材11・・にて構成されているので、湾曲させたり屈曲させたりすることが可能な可撓性を有し、これによって例えば工場出荷の際等にはコイル状に巻いて梱包することができ、また現場においては植生地盤の形状等に追従させた柔軟な敷き込みが可能となっている。   Moreover, in this water retention mat 1 for vegetation, since the shape-retaining body 5 is composed of a plurality of corrugated members 11 arranged at intervals, flexibility that can be bent or bent is provided. Thus, for example, at the time of factory shipment, it can be wound in a coil shape and packed, and on the site, flexible laying that follows the shape of the vegetation board or the like is possible.
図7は、上記の植生用保水マット1を使用した植生地盤の構造を示しており、植生用保水マット1は、芝生やその他の植物を植生した植生層30の裏面側に敷き込まれている。図中31は、土壌層を示している。なお、この敷き込みに際しては、植生層30の下面全面を覆うように複数のマット1・・を隙間なく配置したり、或いは、植生層30における植物の配置等に対応させて複数のマット1・・を要所要所に配置しても良い。   FIG. 7 shows the structure of a vegetation board using the vegetation retention mat 1 described above, and the vegetation retention mat 1 is laid on the back side of the vegetation layer 30 on which vegetation is planted. . In the figure, 31 indicates a soil layer. When laying, the plurality of mats 1... Are arranged without gaps so as to cover the entire lower surface of the vegetation layer 30, or the plurality of mats 1. -May be placed where necessary.
このようにマット1・・を敷き込んだ植生地盤においては、降雨によって植生層30からマット1へ雨水が浸透すると、その吸水膨張体4が雨水を吸収して膨張し、その雨水を保持する。また、吸水膨張体4に混入した感温吸排水性樹脂10も、雨水を吸収して保持する。このとき、図5に示すように、吸水膨張体4の膨張分が保形体5の膨張吸収空間Sに入り込むので、マット1の全体形状は、吸水膨張体4の雨水吸収前とほぼ同じでほとんど変化しない。このため、吸水膨張体4が膨張しても、植生層30を押し上げることがなく、地表面には吸水膨張体4の膨張に伴う凹凸が生じることはない。   In the vegetation board in which the mats 1 and so on are laid in this manner, when rainwater permeates from the vegetation layer 30 to the mat 1 due to rain, the water absorbing expansion body 4 absorbs rainwater and expands to hold the rainwater. Moreover, the temperature-sensitive water-absorbing resin 10 mixed in the water-absorbing expansion body 4 also absorbs and holds rainwater. At this time, as shown in FIG. 5, since the expansion of the water absorbent expansion body 4 enters the expansion absorption space S of the shape retaining body 5, the overall shape of the mat 1 is almost the same as before the water absorption expansion body 4 absorbs rainwater. It does not change. For this reason, even if the water absorption expansion body 4 expand | swells, the vegetation layer 30 is not pushed up and the unevenness | corrugation accompanying expansion | swelling of the water absorption expansion body 4 does not arise in the ground surface.
そして、昼間の高温時や夏の渇水時等において、植生層30が乾燥してくると、吸水膨張体4や感温吸排水性樹脂10において保持していた雨水が徐々に放散されて、植生層30へ生育に十分な量の水分が供給される。このように、本来であれば土壌層31に浸透する雨水を蓄えて有効利用することで、面倒な水遣り作業の頻度を大幅に減らすことができ、また水の使用量を減らして維持コストの低減を図ることができる。   When the vegetation layer 30 dries at high temperatures during the daytime or during drought in the summer, the rainwater retained in the water-absorbing expander 4 and the temperature-sensitive water-absorbing resin 10 is gradually diffused, and the vegetation is vegetated. A sufficient amount of moisture is supplied to the layer 30 for growth. Thus, by storing rainwater that normally penetrates the soil layer 31 and effectively using it, the frequency of troublesome watering operations can be greatly reduced, and the amount of water used can be reduced to reduce maintenance costs. Can be achieved.
一方、大量に雨が降って地下水位が上昇した場合には、植生用保水マット1の排水領域21、21を通じて余剰分の雨水を植生地盤から速やかに排出するので、植生層30の根腐れ等を防止することができる。   On the other hand, when a large amount of rain falls and the groundwater level rises, excess rainwater is quickly discharged from the vegetation board through the drainage areas 21 and 21 of the vegetation retention mat 1, so that the vegetation layer 30 is rooted, etc. Can be prevented.
以上にこの発明の具体的な実施の形態について説明したが、この発明は上記形態に限定されるものではなく、この発明の範囲内で種々変更して実施することができる。透水シート体3、3としては、例えば透水性を有する防根シートを用いるようにしても良い。また、上側の透水シート体3に対して透水性を有する防根シートを重ね合わせるようにしても良い。このように防根シートを用いることで、植生層30における芝生等の根が吸水膨張体4へ侵入するのを防止することができ、根腐れ等を防止することができる。また、これら透水シート体3、3や保形体5の材質としても、融着性等を考慮して種々選択することができる。さらに、マット1を形成する場合、透水シート体3、3と保形体5と吸水膨張体4とを熱融着にて一体化したが、各部材の材質等を考慮して、例えば接着剤による接着等の他の固定手段を用いても良い。接着剤等を使用すれば、透水シート体3、3と吸水膨張体4との接合も可能である。 Although specific embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. As the water permeable sheet bodies 3, 3, for example, a root-proof sheet having water permeability may be used. Further, a root-proof sheet having water permeability may be superposed on the upper water-permeable sheet body 3. By using the root-proof sheet in this way, it is possible to prevent roots such as lawn in the vegetation layer 30 from entering the water-absorbing expanded body 4, and root rot and the like can be prevented. Further, the water permeable sheet bodies 3 and 3 and the shape retaining body 5 can be variously selected in consideration of the fusing property and the like. Further, when the mat 1 is formed, the water-permeable sheet bodies 3 and 3, the shape retaining body 5, and the water absorbing / expanding body 4 are integrated by heat fusion. Other fixing means such as adhesion may be used. If an adhesive agent etc. are used, joining of the water-permeable sheet bodies 3 and 3 and the water absorption expansion body 4 is also possible.
この発明の一実施形態に係る植生用保水マットの分解斜視図である。It is a disassembled perspective view of the water retention mat for vegetation concerning one embodiment of this invention. 同じくその斜視図である。It is the perspective view similarly. 透水シート体の平面図である。It is a top view of a water-permeable sheet body. 植生用保水マットの縦断面図である。It is a longitudinal cross-sectional view of the water retention mat for vegetation. 植生用保水マットの吸水時の縦断面図である。It is a longitudinal cross-sectional view at the time of water absorption of the water retention mat for vegetation. 他の実施形態に係る植生用保水マットの斜視図である。It is a perspective view of the water retention mat for vegetation concerning other embodiments. 植生用保水マットを使用した植生地盤の構造の縦断面図である。It is a longitudinal cross-sectional view of the structure of the vegetation board using the water retention mat for vegetation.
符号の説明Explanation of symbols
1・・植生用保水マット、3・・透水シート体、4・・吸水膨張体、5・・保形体、10・・感温吸排水性樹脂、11・・波状部材、15・・凹部、20・・保水領域、21・・排水領域、30・・植生層、S・・膨張吸収空間   1 .... Water retention mat for vegetation, 3 .... Water-permeable sheet body, 4 .... Water-absorbing expansion body, 5 .... Shape-holding body, 10 .... Temperature-sensitive water-absorbing resin, 11 .... Wavy member, 15 .... Recess, 20・ ・ Water retention area, 21 ・ ・ Drainage area, 30 ・ ・ Vegetation layer, S ・ ・ Expansion absorption space

Claims (7)

  1. 水を吸収して膨張する吸水性ポリマーを主素材とする不織布からなる吸水膨張体(4)と、その吸水膨張体(4)の膨張部分が入り込む膨張吸収空間(S)を形成する保形体(5)とが積層され、芝生その他の植物を植生した植生層(30)とその下側の土壌層(31)との間に、前記吸水膨張体(4)が上側、前記保形体(5)が下側となるように敷き込まれる植生用保水マット(1)であって、前記保形体(5)は、複数の樹脂製の波状部材(11・・)を同一平面上に間隔をあけて並設してなり、それら波状部材(11・・)の凹部(15・・)及び波状部材(11・・)間の隙間が前記膨張吸収空間(S)とされていることを特徴とする植生用保水マット。 A water-absorbing expansion body (4) made of a nonwoven fabric mainly composed of a water-absorbing polymer that absorbs water and expands, and a shape-retaining body (S) that forms an expansion absorption space (S) into which an expansion portion of the water-absorbing expansion body (4) enters. 5) are stacked, and between the vegetation layer (30) in which lawn and other plants are vegetated and the lower soil layer (31), the water-absorbing expansion body (4) is on the upper side, and the shape-retaining body (5) Is a vegetation water retention mat (1) that is laid down on the lower side, and the shape retaining body (5) has a plurality of resin corrugated members (11...) Spaced apart on the same plane. Vegetation characterized in that the gaps between the concave portions (15...) And the corrugated members (11...) Of the corrugated members (11...) Are formed as the expansion absorption space (S). Water retention mat.
  2. 前記吸水膨張体(4)には、感温吸排水性樹脂(10)が混入されている請求項1記載の植生用保水マット。 The water retention mat for vegetation according to claim 1, wherein a temperature-sensitive water-absorbing resin (10) is mixed in the water-absorbing expanded body (4).
  3. 一対の透水シート体(3)(3)を備え、これら透水シート体(3)(3)間に前記吸水膨張体(4)及び保形体(5)が挟み込まれている請求項1又は2記載の植生用保水マット。 A pair of permeable sheet body (3) (3), these permeable sheet body (3) (3) The hygroscopic expansion member between (4) and claim 1 or 2 wherein the coercive form (5) is interposed Vegetation water retention mat.
  4. 前記保形体(5)の一部を覆うようにして前記吸水膨張体(4)を配置することで、マット(1)全面において保水領域(20)と排水領域(21)(21)が形成されている請求項1から3のいずれかに記載の植生用保水マット。 By disposing the water absorbing and expanding body (4) so as to cover a part of the shape retaining body (5), a water retaining area (20) and drainage areas (21) and (21) are formed on the entire surface of the mat (1). The vegetation retention mat according to any one of claims 1 to 3 .
  5. 前記保形体(5)の略全面を覆うようにして前記吸水膨張体(4)を配置することで、マット(1)略全面に亘って保水領域(20)が形成されている請求項1から3のいずれかに記載の植生用保水マット。 A substantially Placing the hygroscopic expansion body so as to cover the entire surface (4), mat (1) according to claim 1, water retention area (20) is formed over substantially the entire surface of the retaining feature (5) The water retention mat for vegetation according to any one of 3 above .
  6. 可撓性を有する請求項1から5のいずれかに記載の植生用保水マット。 The water retention mat for vegetation according to any one of claims 1 to 5, which has flexibility.
  7. 請求項1から6のいずれかに記載の植生用保水マット(1)を、芝生その他の植物を植生した植生層(30)とその下側の土壌層(31)との間に敷き込んでなることを特徴とする植生地盤の構造。 The water retention mat (1) for vegetation according to any one of claims 1 to 6 is laid between a vegetation layer (30) on which turf and other plants are vegetated and a lower soil layer (31). The structure of the vegetation board characterized by this.
JP2005271536A 2005-09-20 2005-09-20 Water retention mat for vegetation and structure of vegetation board using the same Expired - Fee Related JP5040011B2 (en)

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