JP6094787B2 - Underground irrigation member and underground irrigation system using the same - Google Patents

Underground irrigation member and underground irrigation system using the same Download PDF

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JP6094787B2
JP6094787B2 JP2012117276A JP2012117276A JP6094787B2 JP 6094787 B2 JP6094787 B2 JP 6094787B2 JP 2012117276 A JP2012117276 A JP 2012117276A JP 2012117276 A JP2012117276 A JP 2012117276A JP 6094787 B2 JP6094787 B2 JP 6094787B2
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water
permeable
underground irrigation
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JP2013243936A (en
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小野寺 恒雄
恒雄 小野寺
信二 島田
信二 島田
邦彦 岡田
邦彦 岡田
英和 佐々木
英和 佐々木
平尾 和弘
和弘 平尾
謙一郎 今久保
謙一郎 今久保
嘉彦 中西
嘉彦 中西
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National Agriculture and Food Research Organization
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この発明は地下灌漑用部材およびそれを用いた地下灌漑システムに関し、特にたとえば、地下から水を供給して土壌の水分量を適切に保つ地下灌漑システムに用いられる、地下灌漑用部材およびそれを用いた地下灌漑システムに関する。   The present invention relates to an underground irrigation member and an underground irrigation system using the same, and in particular, for example, an underground irrigation member used in an underground irrigation system that supplies water from the underground to keep the moisture content of the soil appropriate. Was related to underground irrigation system.

従来、畑地などの灌水には、地表に這わせた孔あきホースやスプリンクラ等を用いて、地表面から土壌に水を供給する地表灌水が一般的に用いられている。ここで、地表灌水によって土壌に供給された水は、土壌表面や植物表面も潤すことになるが、これらの水の多くは表面蒸発してしまうだけであるので、水の無駄遣いが生じる。また、土壌のぬかるみによって作業に支障が出たり、泥跳ねや土壌表面におけるクラスト(土膜)形成などの不具合を招いたりしてしまう。さらに、ハウス栽培の場合には、土壌表面から蒸発した水分によってハウス内の湿度が過剰に高くなり、植物の病気発生の原因となる場合もある。   Conventionally, surface irrigation for supplying water from the ground surface to the soil using a perforated hose or a sprinkler or the like laid on the ground surface is generally used for irrigation of fields and the like. Here, the water supplied to the soil by surface irrigation also moistens the soil surface and the plant surface, but since most of these waters only evaporate, the water is wasted. In addition, the mud of the soil may hinder the work, and may cause problems such as mud splashing and crust (soil film) formation on the soil surface. Further, in the case of house cultivation, the moisture in the house is excessively increased by moisture evaporated from the soil surface, which may cause plant diseases.

これに対して、地下から水を供給する地下灌漑では、供給した水が土壌表面から蒸発することがほとんど無いので、水の無駄遣いを低減でき、水資源を効率的に利用できる。また、土壌がぬかるんだり、ハウス内の湿度が過度に上昇したりする等の地表灌水に起因する不具合も生じない。このため、近年では、各種の地下灌漑システムが提案されている。   On the other hand, in underground irrigation in which water is supplied from the underground, the supplied water hardly evaporates from the soil surface, so that waste of water can be reduced and water resources can be used efficiently. Moreover, the malfunction resulting from surface irrigation, such as the soil becoming muddy or the humidity in the house rising excessively, does not occur. For this reason, various underground irrigation systems have been proposed in recent years.

たとえば、特許文献1には、従来の地下灌漑システムが開示される。この地下灌漑システムでは、上側開口の容器状に形成された遮水部材を耕作地などの地中に埋設し、遮水部材の内部に水を供給して重力水状態の土壌部を形成する。そして、重力水状態の土壌部から毛細管現象によって植物根圏の土壌に水を供給するようにしている。一例として、上側に開口を設けた横管状(横長の容器状)の遮水部材が用いられ、この遮水部材内には、その端部まで適切に水を供給するための水路(通水空間)を形成する有孔管や導水部などの給水部材が配設される。
特開2010−29072号公報 [A01G 25/00]
For example, Patent Document 1 discloses a conventional underground irrigation system. In this underground irrigation system, a water-impervious member formed in a container shape with an upper opening is embedded in a ground such as a cultivated land, and water is supplied to the inside of the water-impervious member to form a soil portion in a gravity water state. And it is made to supply water to the soil of a plant rhizosphere by the capillary phenomenon from the soil part of a gravity water state. As an example, a horizontal tubular (horizontally long container-shaped) water shielding member having an opening on the upper side is used, and a water channel (water flow space) for supplying water appropriately to the end of the water shielding member. A water supply member such as a perforated pipe or a water guide section is provided.
JP 2010-29072 A [A01G 25/00]

しかしながら、特許文献1の技術では、遮水部材と有孔管とが別体であったり、遮水部材に導水部が一体化される場合でも、導水部の下端部に長手方向に延びる間隙が形成されたりしているため、植物の根が伸びた際には、有孔管や導水部の周囲に根が回り込んで巻き付く状態となってしまう場合がある。有孔管や導水部に根が巻き付いた状態で、耕運機などを用いて耕作地を耕すと、巻き付いた根ごと有孔管や導水部が引き抜かれてしまい、地下灌漑システムが損傷してしまう恐れがある。   However, in the technique of Patent Document 1, even when the water-impervious member and the perforated pipe are separate bodies or the water guide part is integrated with the water-impervious member, a gap extending in the longitudinal direction is formed at the lower end of the water guide part. In some cases, when the roots of the plant extend, the roots may wrap around the perforated pipe or the water guide portion. If the cultivated land is cultivated using a cultivator or the like with the roots wrapped around the perforated pipe or the water conveyance section, the perforated pipe or the water conveyance section may be pulled out with the wound roots and the underground irrigation system may be damaged. There is.

それゆえに、この発明の主たる目的は、新規な、地下灌漑用部材およびそれを用いた地下灌漑システムを提供することである。   Therefore, a main object of the present invention is to provide a novel underground irrigation member and an underground irrigation system using the same.

この発明の他の目的は、根の巻き付きを防止できる、地下灌漑用部材およびそれを用いた地下灌漑システムを提供することである。   Another object of the present invention is to provide an underground irrigation member and an underground irrigation system using the same, which can prevent the winding of a root.

この発明のさらに他の目的は、施工を簡略化できる、地下灌漑用部材およびそれを用いた地下灌漑システムを提供することである。   Still another object of the present invention is to provide an underground irrigation member and an underground irrigation system using the same, which can simplify the construction.

この発明は、上記の課題を解決するために、以下の構成を採用した。なお、括弧内の参照符号および補足説明などは、本発明の理解を助けるために後述する実施の形態との対応関係を示したものであって、この発明を何ら限定するものではない。   The present invention employs the following configuration in order to solve the above problems. Note that reference numerals in parentheses and supplementary explanations indicate correspondence with embodiments described later in order to help understanding of the present invention, and do not limit the present invention.

第1の発明は、地中に埋設されて使用される地下灌漑用部材であって、遮水性を有し、上側開口の溝状に埋設される遮水部、透水性を有し、両側縁部が遮水部と一体化されて、遮水部の内面側に長手方向に延びる通水空間を形成する透水部、および透水部内に設けられ、通水空間の閉塞を防止する空間保持部を備え、遮水部、透水部および空間保持部は、予め一体化されており、透水部は、遮水部内の当該透水部よりも下側の空間に一定の厚みの土の層が形成されるように、遮水部の側面に一体化されている、地下灌漑用部材である。 1st invention is the member for underground irrigation used by being embed | buried in the ground, has a water-impervious part, has a water-impervious part embedded in a groove shape of an upper opening, has water permeability, and has both side edges A water-permeable part that is integrated with the water-impervious part to form a water-permeable space extending in the longitudinal direction on the inner surface side of the water-impervious part, and a space holding part that is provided in the water-permeable part and prevents the water-permeable space from being blocked. The water-impervious part, the water-permeable part, and the space holding part are integrated in advance, and the water-permeable part is formed with a soil layer having a certain thickness in a space below the water-permeable part in the water-impervious part. Thus, it is the member for underground irrigation integrated with the side surface of the water-impervious portion .

第1の発明では、地下灌漑用部材(10,100)は、地下から水を供給して土壌の水分量を適切に保つ地下灌漑システム(50,104)に用いられる部材であり、地中に埋設されて使用される。地下灌漑用部材は、遮水部(12)および透水部(14)を含む。遮水部は、土壌に供給する水を地中で保持しておくための遮水性を有する部分であり、上側開口の溝状に埋設される。透水部は、遮水部内への水の供給および遮水部内の余剰水の排水を行う通水空間(26)を遮水部の内面側に形成するための部分であり、その両側縁部が遮水部と一体化されている。透水部は、透水性を有する、つまり水が無加圧で通過する微細な孔を有している。また、透水部の内部には、空間保持部(16)が設けられる。実施例では、平板状の基部(34)に対して複数の突起部(36)が形成されたエンボスシート(32)が空間保持部として用いられる。この場合、突起部が内側から透水部を支持することにより、土圧などによる通水空間の閉塞が防止される。さらに、透水部は、遮水部内の透水部(通水空間)よりも下側の空間に一定の厚みの土の層が形成されるように、遮水部の側面に一体化されている。 In the first invention, the underground irrigation member (10, 100) is a member used in the underground irrigation system (50, 104) for supplying water from the underground to keep the moisture content of the soil appropriately. Used buried. The member for underground irrigation includes a water shielding part (12) and a water permeable part (14). The water-impervious portion is a portion having a water-impervious property for keeping water supplied to the soil in the ground, and is embedded in a groove shape of the upper opening. The water permeable portion is a portion for forming a water flow space (26) for supplying water into the water shielding portion and discharging excess water in the water shielding portion on the inner surface side of the water shielding portion, It is integrated with the water shielding part. The water permeable part has water permeability, that is, has fine holes through which water passes without pressure. Moreover, a space holding part (16) is provided inside the water permeable part. In the embodiment, an embossed sheet (32) in which a plurality of protrusions (36) are formed on a flat base (34) is used as a space holding part. In this case, since the protrusions support the water permeable portion from the inside, blockage of the water flow space due to earth pressure or the like is prevented. Further, the water permeable portion is integrated with the side surface of the water shielding portion so that a soil layer having a certain thickness is formed in a space below the water permeable portion (water passage space) in the water shielding portion.

このような地下灌漑用部材を用いた地下灌漑システムでは、透水部内(通水空間)を通って遮水部内に供給された水が、保水土壌部(54,106)を形成する。そして、保水土壌部に保持した水を毛細管現象によって上側の土壌に浸透させることにより、植物の根圏(作土層)を適切な水分量に保つ。   In the underground irrigation system using such a member for underground irrigation, the water supplied into the impermeable portion through the permeable portion (water passage space) forms the water retaining soil portion (54, 106). And the rhizosphere (soil-forming layer) of a plant is kept at an appropriate amount of water by allowing water retained in the water-retaining soil part to permeate the upper soil by capillary action.

ここで、生育した植物の根(70)が保水土壌部および透水部の位置まで伸びてきた場合でも、透水部の両側縁部が遮水部と一体化されているので、透水部の周方向への根の伸長は、遮水部によって阻止される。このため、透水部の周囲に根が回り込んで互いに絡まり合う状態となることが防止される。   Here, even when the root (70) of the grown plant extends to the position of the water retaining soil part and the water permeable part, both side edges of the water permeable part are integrated with the water shielding part, so the circumferential direction of the water permeable part The extension of the root to is prevented by the water shielding part. For this reason, it is prevented that the roots wrap around the water-permeable portion and become intertwined with each other.

の発明によれば、通水空間を形成する透水部に対する根の巻き付きを防止できるので、耕運時や植物の収穫時などに、巻き付いた根ごと地下灌漑用部材が引き抜かれて地下灌漑システムが破損してしまうことを防止できる。また、遮水部と通水空間を形成する透水部とが予め一体的に形成されるので、遮水部材と有孔管とを別々に施工する場合と比較して、施工手間が簡略化される。さらに、部材コストも低減できる。さらにまた、地下灌漑用部材を傾斜させて埋設しても、水を一時的に保持する保水土壌部が遮水部内に適切に形成される。 According to the first invention, it is possible to prevent the wrapping of the root to the water permeable portion forming the water passage space, so that the underground irrigation member is pulled out together with the wound root when cultivating or when the plant is harvested. The system can be prevented from being damaged. In addition, since the water-impervious part and the water-permeable part forming the water passage space are integrally formed in advance, the construction labor is simplified compared to the case where the water-impervious member and the perforated pipe are separately constructed. The Furthermore, member costs can be reduced. Furthermore, even if the underground irrigation member is inclined and buried, a water retaining soil portion that temporarily holds water is appropriately formed in the impermeable portion.

の発明は、地中に埋設されて使用される地下灌漑用部材であって、遮水性を有し、上側開口の溝状に埋設される遮水部、透水性を有し、両側縁部が遮水部と一体化されて、遮水部の内面側に長手方向に延びる通水空間を形成する透水部、および透水部内に設けられ、通水空間の閉塞を防止する空間保持部を備え、遮水部、透水部および空間保持部は、予め一体化されており、透水部は、遮水部内の当該透水部よりも下側の空間に一定の厚みの土の層が形成されるように、当該遮水部に形成された底上げ部の上面に一体化されている、地下灌漑用部材である。 The second invention is a member for underground irrigation that is buried and used in the ground, has a water-impervious portion, has a water-impervious portion embedded in a groove shape of the upper opening, has water permeability, and has both side edges. A water-permeable part that is integrated with the water-impervious part to form a water-permeable space extending in the longitudinal direction on the inner surface side of the water-impervious part, and a space holding part that is provided in the water-permeable part and prevents the water-permeable space from being blocked. The water-impervious part, the water-permeable part, and the space holding part are integrated in advance, and the water-permeable part is formed with a soil layer having a certain thickness in a space below the water-permeable part in the water-impervious part. Thus, it is the member for underground irrigation integrated with the upper surface of the bottom raising part formed in the said water-impervious part.

の発明によれば、第1の発明と同様に、通水空間を形成する透水部に対する根の巻き付きを防止できるので、耕運時や植物の収穫時などに、巻き付いた根ごと地下灌漑用部材が引き抜かれて地下灌漑システムが破損してしまうことを防止できる。また、遮水部と通水空間を形成する透水部とが予め一体的に形成されるので、遮水部材と有孔管とを別々に施工する場合と比較して、施工手間が簡略化される。さらに、部材コストも低減できる。さらにまた、地下灌漑用部材を傾斜させて埋設しても、水を一時的に保持する保水土壌部が遮水部内に適切に形成される。 According to the second invention, similar to the first invention, it is possible to prevent the winding of the roots for the permeability portion which forms a water passing space, such as during harvest tillage during and plants, each wound roots subirrigation It is possible to prevent the underground irrigation system from being damaged by pulling out the construction material. In addition, since the water-impervious part and the water-permeable part forming the water passage space are integrally formed in advance, the construction labor is simplified compared to the case where the water-impervious member and the perforated pipe are separately constructed. The Furthermore, member costs can be reduced. Furthermore, even if the underground irrigation member is inclined and buried, a water retaining soil portion that temporarily holds water is appropriately formed in the impermeable portion.

の発明は、地中に埋設されて使用される地下灌漑用部材であって、遮水性および可撓性を有するシート状に形成される遮水部、透水性および可撓性を有し、両側縁部が遮水部と一体化されて、遮水部の一方面に長手方向に延びる通水空間を形成する透水部、および可撓性を有し、透水部内に設けられて、通水空間の閉塞を防止する空間保持部を備え、遮水部、透水部および空間保持部は、予め一体化されており、地下灌漑用部材は、施工前はロール状に巻回されて保持され、耕作地への施工時において、ロール状態から引き出されて、一方面が内面側となるように、遮水部が上側開口の溝状に変形されて埋設される、地下灌漑用部材である。 A third invention is a member for underground irrigation that is used by being buried in the ground, and has a water shielding portion formed in a sheet shape having water shielding properties and flexibility, water permeability and flexibility. The side edges are integrated with the water-impervious part, and the water-permeable part that forms a water passage space extending in the longitudinal direction on one surface of the water-impervious part, and has flexibility, is provided in the water-permeable part, It is equipped with a space holding part that prevents blockage of the water space, and the water shielding part, the water permeable part, and the space holding part are integrated in advance, and the member for underground irrigation is wound and held in a roll before construction. In the construction on the cultivated land, it is a member for underground irrigation in which the water shielding portion is deformed and embedded in the groove shape of the upper opening so that the one surface becomes the inner surface side when pulled out from the roll state.

の発明では、地下灌漑用部材(10,100)は、地下から水を供給して土壌の水分量を適切に保つ地下灌漑システム(50,104)に用いられる部材であり、地中に埋設されて使用される。地下灌漑用部材は、遮水部(12)および透水部(14)を含む。遮水部は、土壌に供給する水を地中で保持しておくための遮水性を有する部分であり、製造工場においては、たとえば平らなシート状に形成される。そして、施工現場において、上側開口の溝形に折り曲げて埋設することにより、土圧によってその形状を保持する。一方、透水部は、遮水部内への水の供給および遮水部内の余剰水の排水を行う通水空間(26)を遮水部の内面側に形成するための部分であり、その両側縁部が遮水部と一体化されている。透水部は、透水性を有する、つまり水が無加圧で通過する微細な孔を有している。また、透水部の内部には、空間保持部(16)が設けられる。実施例では、平板状の基部(34)に対して複数の突起部(36)が形成されたエンボスシート(32)が空間保持部として用いられる。この場合、突起部が内側から透水部を支持することにより、土圧などによる通水空間の閉塞が防止される。このような地下灌漑用部材の全体、つまり遮水部、透水部および空間保持部のそれぞれが可撓性を有するように形成され、地下灌漑用部材は、施工前はロール状に巻回されて保持される。そして、施工時にロール状態から引き出されて埋設される。 In the third invention, the underground irrigation member (10, 100) is a member used in the underground irrigation system (50, 104) for supplying water from the underground to keep the moisture content of the soil appropriately. Used buried. The member for underground irrigation includes a water shielding part (12) and a water permeable part (14). The water-impervious portion is a portion having a water-impervious property for holding water supplied to the soil in the ground, and is formed, for example, in a flat sheet shape in the manufacturing factory. And in the construction site, the shape is held by earth pressure by bending and embedding in the groove shape of the upper opening. On the other hand, the water permeable portion is a portion for forming a water passing space (26) for supplying water into the water shielding portion and discharging surplus water in the water shielding portion on the inner surface side of the water shielding portion, The part is integrated with the water shielding part. The water permeable part has water permeability, that is, has fine holes through which water passes without pressure. Moreover, a space holding part (16) is provided inside the water permeable part. In the embodiment, an embossed sheet (32) in which a plurality of protrusions (36) are formed on a flat base (34) is used as a space holding part. In this case, since the protrusions support the water permeable portion from the inside, blockage of the water flow space due to earth pressure or the like is prevented. The whole of the underground irrigation member, that is, each of the water shielding portion, the water permeable portion, and the space holding portion is formed to have flexibility, and the underground irrigation member is wound into a roll before construction. Retained. And it pulls out from a roll state at the time of construction, and is embed | buried.

の発明によれば、遮水部が可撓性を有するシート状に形成され、また、透水部および空間保持部も可撓性を有するので、ドラム等に対して地下灌漑用部材をロール状に巻き付けることが容易となり、地下灌漑用部材の搬送および保管などが容易となる。 According to the third invention, since the water shielding portion is formed in a flexible sheet shape, and the water permeable portion and the space holding portion are also flexible, the member for underground irrigation is rolled against the drum or the like. It becomes easy to wrap it in a shape, and it becomes easy to transport and store the member for underground irrigation.

また、第1の発明と同様に、通水空間を形成する透水部に対する根の巻き付きを防止できるので、耕運時や植物の収穫時などに、巻き付いた根ごと地下灌漑用部材が引き抜かれて地下灌漑システムが破損してしまうことを防止できる。さらに、遮水部と通水空間を形成する透水部とが予め一体的に形成されるので、遮水部材と有孔管とを別々に施工する場合と比較して、施工手間が簡略化され、部材コストも低減できる。   In addition, as in the first aspect of the invention, it is possible to prevent the wrapping of the roots around the water permeable portion forming the water flow space, so that the members for underground irrigation are pulled out together with the wound roots when cultivating or when harvesting plants. It can prevent the underground irrigation system from being damaged. Furthermore, since the water-impervious part and the water-permeable part forming the water passage space are integrally formed in advance, the construction labor is simplified compared to the case where the water-impervious member and the perforated pipe are separately constructed. Moreover, member cost can also be reduced.

の発明は、第1ないし第のいずれかの発明に従属し、複数の透水部を備える。
の発明では、遮水部(12)が形成する溝内には、複数の透水部が設けられる。たとえば、遮水部の側板(22)のそれぞれに対して、透水部が設けられる。
A fourth invention is dependent on any one of the first to third inventions, and includes a plurality of water permeable portions.
In 4th invention, a some water-permeable part is provided in the groove | channel which a water-impervious part (12) forms. For example, a water permeable part is provided for each of the side plates (22) of the water shielding part.

の発明によれば、複数の透水部を遮水部に設けておく、つまり予備の透水部を有することによって、1つの透水部が灌水部や集水部として機能しなくなってしまった場合でも、代わりに他の透水部を利用することができる。したがって、地下灌漑用部材の寿命を延ばすことができる。 According to the fourth invention, when a plurality of water-permeable portions are provided in the water-impervious portion, that is, by having a spare water-permeable portion, one water-permeable portion has stopped functioning as a irrigation portion or a water collection portion. However, other water permeable parts can be used instead. Therefore, the lifetime of the underground irrigation member can be extended.

の発明は、第1ないし第のいずれかの発明に従属し、透水部は、布製である。 A fifth invention is dependent on any one of the first to fourth inventions, and the water permeable portion is made of cloth.

の発明では、透水部(14)は、不織布および織布などの布によって形成される。 In 5th invention, a water-permeable part (14) is formed with cloths, such as a nonwoven fabric and a woven fabric.

の発明は、第1ないし第のいずれかの発明に従属し、透水部は、防根性を有する。 A sixth invention is dependent on any one of the first to fifth inventions, and the water-permeable portion has root-proofing properties.

の発明では、透水部(14)は、透水性を有すると共に、防根性も有している。つまり、水は無加圧で通過するが植物の根よりは小さい微細な孔を有している。 In the sixth invention, the water permeable portion (14) has water permeability and also has root prevention properties. That is, water passes through without pressure but has fine pores smaller than the roots of the plant.

の発明によれば、通水空間を形成する透水部が防根性を有するので、根による透水部の孔の詰まりが防止され、透水部から遮水部内への水の供給を適切に行うことができる。 According to the sixth invention, the water-permeable portion forming the water-permeable space has a root-proofing property, so clogging of the hole of the water-permeable portion by the root is prevented, and water is appropriately supplied from the water-permeable portion into the water-impervious portion. be able to.

の発明は、第1ないし第のいずれかの発明に係る地下灌漑用部材を用いて、土壌に対して地下から水を供給する地下灌漑システムであって、地中に埋設される地下灌漑用部材、および地下灌漑用部材の透水部と接続され、透水部の通水空間に対して水を供給する給水部材を備える、地下灌漑システムである。 A seventh invention is an underground irrigation system that supplies water from the underground to the soil using the underground irrigation member according to any one of the first to sixth inventions, and is an underground buried in the ground An underground irrigation system including a water supply member connected to an irrigation member and a water permeable portion of the underground irrigation member and supplying water to a water flow space of the water permeable portion.

の発明では、地下灌漑システム(50)は、地下灌漑用部材(10)および給水部材(58,60)を備え、地下から水を供給して土壌の水分量を適切に保つ。地下灌漑用部材は、遮水部(12)および透水部(14)を含み、地中に埋設されて使用される。遮水部は、土壌に供給する水を地中で保持しておくための遮水性を有する部分であり、上側開口の溝状に形成される。透水部は、遮水部内への水の供給および遮水部内の余剰水の排水を行う通水空間(26)を遮水部の内面側に形成するための部分であり、その両側縁部が遮水部と一体化されている。透水部は、透水性を有する、つまり水が無加圧で通過する微細な孔を有している。また、透水部の内部には、空間保持部(16)が設けられる。そして、給水部材は、地下灌漑用部材の透水部と接続され、通水空間に対して水を供給する。 In the seventh invention, the underground irrigation system (50) includes the underground irrigation member (10) and the water supply member (58, 60), and supplies water from the underground to keep the moisture content of the soil appropriately. The underground irrigation member includes a water-impervious portion (12) and a water-permeable portion (14), and is used by being buried in the ground. The water-impervious portion is a portion having a water-impervious property for keeping water supplied to the soil in the ground, and is formed in a groove shape of the upper opening. The water permeable portion is a portion for forming a water flow space (26) for supplying water into the water shielding portion and discharging excess water in the water shielding portion on the inner surface side of the water shielding portion, It is integrated with the water shielding part. The water permeable part has water permeability, that is, has fine holes through which water passes without pressure. Moreover, a space holding part (16) is provided inside the water permeable part. The water supply member is connected to the water permeable portion of the underground irrigation member, and supplies water to the water flow space.

このような地下灌漑システムでは、透水部内(通水空間)を通って遮水部内に供給された水が、保水土壌部(54)を形成する。そして、保水土壌部に保持した水を毛細管現象によって上側の土壌に浸透させることにより、植物の根圏(作土層)を適切な水分量に保つ。   In such an underground irrigation system, the water supplied into the impermeable portion through the water permeable portion (water passage space) forms the water retaining soil portion (54). And the rhizosphere (soil-forming layer) of a plant is kept at an appropriate amount of water by allowing water retained in the water-retaining soil part to permeate the upper soil by capillary action.

ここで、生育した植物の根(70)が保水土壌部および透水部の位置まで伸びてきても、地下灌漑用部材では、通水空間を形成する透水部の両側縁部が遮水部と一体化されているので、透水部の周方向への根の伸長は、遮水部によって阻止される。このため、透水部の周囲に根が回り込んで互いに絡まり合う状態となることが防止される。   Here, even if the root (70) of the grown plant extends to the position of the water retaining soil part and the water permeable part, in the underground irrigation member, both side edges of the water permeable part forming the water passing space are integrated with the water shielding part. Therefore, the extension of the root in the circumferential direction of the water permeable portion is prevented by the water shielding portion. For this reason, it is prevented that the roots wrap around the water-permeable portion and become intertwined with each other.

の発明によれば、通水空間を形成する透水部に対する根の巻き付きを防止できるので、耕運時や植物の収穫時などに、巻き付いた根ごと地下灌漑用部材が引き抜かれて地下灌漑システムが破損してしまうことを防止できる。また、遮水部と通水空間を形成する透水部とが予め一体的に形成されるので、遮水部材と有孔管とを別々に施工する場合と比較して、施工手間が簡略化され、部材コストも低減できる。 According to the seventh aspect of the invention, it is possible to prevent the wrapping of the root to the water permeable portion forming the water passage space, so that the underground irrigation member is pulled out together with the wound root when cultivating or harvesting the plant. The system can be prevented from being damaged. In addition, since the water-impervious part and the water-permeable part forming the water passage space are integrally formed in advance, the construction labor is simplified compared to the case where the water-impervious member and the perforated pipe are separately constructed. Moreover, member cost can also be reduced.

の発明は、第1ないし第のいずれかの発明に係る地下灌漑用部材を用いて、土壌に対して地下から水を供給する地下灌漑システムであって、地中に水平に埋設される地下灌漑用部材、地下灌漑用部材の透水部と接続され、透水部の通水空間に対して水を供給する給水部材、および地下灌漑用部材の遮水部内の重力水の水位を所定水位に保つ水位管理器を備える、地下灌漑システムである。 An eighth invention is an underground irrigation system for supplying water from the underground to the soil using the underground irrigation member according to any one of the first to sixth inventions, and is embedded horizontally in the ground. Underground irrigation members, water supply members that are connected to the permeable parts of the underground irrigation members and supply water to the water passing space of the permeable parts, and the gravitational water level in the water shielding parts of the underground irrigation members is a predetermined water level. It is an underground irrigation system with a water level controller that keeps the water level.

の発明では、地下灌漑システム(104)は、地下灌漑用部材(100)、給水部材(58,60)および水位管理器(108)を備え、地下から水を供給して土壌の水分量を適切に保つ。地下灌漑用部材は、遮水部(12)および透水部(14)を含み、地中に水平(略水平を含む)に埋設されて使用される。遮水部は、土壌に供給する水を地中で保持しておくための遮水性を有する部分であり、上側開口の溝状に形成される。透水部は、遮水部内への水の供給および遮水部内の余剰水の排水を行う通水空間(26)を遮水部の内面側に形成するための部分であり、その両側縁部が遮水部と一体化されている。透水部は、透水性を有する、つまり水が無加圧で通過する微細な孔を有している。また、透水部の内部には、空間保持部(16)が設けられる。そして、給水部材は、地下灌漑用部材の透水部と接続され、通水空間に対して水を供給する。水位管理器は、実施例では、第1配水管(58)に設けられ、第1配水管から透水部内への水の供給を調整する。 In the eighth invention, an underground irrigation system (104) includes an underground irrigation member (100), a water supply member (58, 60), and a water level controller (108), and supplies water from the underground to provide a moisture content of the soil. Keep it appropriate. The underground irrigation member includes a water-impervious portion (12) and a water-permeable portion (14), and is used by being buried horizontally (including substantially horizontal) in the ground. The water-impervious portion is a portion having a water-impervious property for keeping water supplied to the soil in the ground, and is formed in a groove shape of the upper opening. The water permeable portion is a portion for forming a water flow space (26) for supplying water into the water shielding portion and discharging excess water in the water shielding portion on the inner surface side of the water shielding portion, It is integrated with the water shielding part. The water permeable part has water permeability, that is, has fine holes through which water passes without pressure. Moreover, a space holding part (16) is provided inside the water permeable part. The water supply member is connected to the water permeable portion of the underground irrigation member, and supplies water to the water flow space. In the embodiment, the water level controller is provided in the first water distribution pipe (58), and adjusts the supply of water from the first water distribution pipe into the water permeable portion.

このような地下灌漑システムでは、透水部内(通水空間)を通って遮水部内に供給された水が、遮水部内に重力水状態の保水土壌部(106)を形成し、この保水土壌部の水位(114)は水位管理器によって一定に保たれる。そして、保水土壌部に保持した水を毛細管現象によって上側の土壌に浸透させることにより、植物の根圏(作土層)を適切な水分量に保つ。   In such an underground irrigation system, the water supplied into the impermeable portion through the water permeable portion (water passage space) forms a gravitational water-retaining soil portion (106) in the impermeable portion, and this retained soil portion The water level (114) is kept constant by the water level controller. And the rhizosphere (soil-forming layer) of a plant is kept at an appropriate amount of water by allowing water retained in the water-retaining soil part to permeate the upper soil by capillary action.

の発明によれば、第の発明と同様に、通水空間を形成する透水部に対する根の巻き付きを防止できるので、耕運時や植物の収穫時などに、巻き付いた根ごと地下灌漑用部材が引き抜かれて地下灌漑システムが破損してしまうことを防止できる。また、遮水部と通水空間を形成する透水部とが予め一体的に形成されるので、遮水部材と有孔管とを別々に施工する場合と比較して、施工手間が簡略化され、部材コストも低減できる。 According to the eighth invention, similarly to the seventh invention, it is possible to prevent the wrapping of the root to the water permeable portion forming the water passage space. It is possible to prevent the underground irrigation system from being damaged by pulling out the construction material. In addition, since the water-impervious part and the water-permeable part forming the water passage space are integrally formed in advance, the construction labor is simplified compared to the case where the water-impervious member and the perforated pipe are separately constructed. Moreover, member cost can also be reduced.

この発明によれば、通水空間を形成する透水部に対する根の巻き付きを防止できるので、耕運時や植物の収穫時などに、巻き付いた根ごと地下灌漑用部材が引き抜かれて地下灌漑システムが破損してしまうことを防止できる。   According to the present invention, it is possible to prevent the wrapping of the root to the water permeable portion forming the water passing space, so that the underground irrigation system is pulled out together with the wound root when cultivating or harvesting the plant. It can be prevented from being damaged.

また、遮水部と通水空間を形成する透水部とが予め一体的に形成されるので、遮水部材と有孔管とを別々に施工する場合と比較して、施工手間が簡略化される。また、部材コストも低減できる。   In addition, since the water-impervious part and the water-permeable part forming the water passage space are integrally formed in advance, the construction labor is simplified compared to the case where the water-impervious member and the perforated pipe are separately constructed. The Moreover, member cost can also be reduced.

この発明の上述の目的、その他の目的、特徴および利点は、図面を参照して行う後述の実施例の詳細な説明から一層明らかとなろう。   The above object, other objects, features, and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

この発明の地下灌漑用部材の一実施例の外観を示す図解図である。It is an illustration figure which shows the external appearance of one Example of the member for underground irrigation of this invention. 図1の地下灌漑用部材を横方向に切断した断面を示す断面図である。It is sectional drawing which shows the cross section which cut | disconnected the member for underground irrigation of FIG. 1 to the horizontal direction. 図1の地下灌漑用部材が備える空間保持部の一例を示す図解図である。It is an illustration figure which shows an example of the space holding part with which the member for underground irrigation of FIG. 1 is provided. 図1の地下灌漑用部材の形成方法の一例を説明するための図解図であり、(A)は製造時における地下灌漑用部材の断面を示し、(B)は施工時における地下灌漑用部材の断面を示す。It is an illustration for demonstrating an example of the formation method of the member for underground irrigation of FIG. 1, (A) shows the cross section of the member for underground irrigation at the time of manufacture, (B) shows the member for underground irrigation at the time of construction A cross section is shown. 図1の地下灌漑用部材を用いた地下灌漑システムの一例を示す概略平面図である。It is a schematic plan view which shows an example of an underground irrigation system using the member for underground irrigation of FIG. 図1の地下灌漑用部材を用いた地下灌漑システムの一例を示す概略側面図である。It is a schematic side view which shows an example of an underground irrigation system using the member for underground irrigation of FIG. 図1の地下灌漑用部材を用いた地下灌漑システムの一例を示す概略断面図である。It is a schematic sectional drawing which shows an example of an underground irrigation system using the member for underground irrigation of FIG. 植物の根が地下灌漑用部材の位置まで伸びてきたときの様子を示す図解図である。It is an illustration figure which shows a mode when the root of a plant has extended to the position of the member for underground irrigation. 地下灌漑用部材を埋設した地中に障害物があったときの様子を示す図解図である。It is an illustration figure which shows a mode when there is an obstruction in the ground where the member for underground irrigation was buried. この発明の地下灌漑用部材の他の実施例を示す断面図である。It is sectional drawing which shows the other Example of the member for underground irrigation of this invention. この発明の地下灌漑用部材のさらに他の実施例を示す断面図である。It is sectional drawing which shows the further another Example of the member for underground irrigation of this invention. この発明の地下灌漑用部材のさらに他の実施例を示す断面図である。It is sectional drawing which shows the further another Example of the member for underground irrigation of this invention. この発明の地下灌漑用部材のさらに他の実施例を示す断面図である。It is sectional drawing which shows the further another Example of the member for underground irrigation of this invention. この発明の地下灌漑用部材のさらに他の実施例を示す断面図である。It is sectional drawing which shows the further another Example of the member for underground irrigation of this invention. この発明の地下灌漑用部材のさらに他の実施例を示す断面図であり、(A)は地下灌漑用部材を横方向に切断した断面を示し、(B)は地下灌漑用部材を長手方向に切断した断面を示す。It is sectional drawing which shows the further another Example of the member for underground irrigation of this invention, (A) shows the cross section which cut | disconnected the member for underground irrigation in the horizontal direction, (B) shows the member for underground irrigation in the longitudinal direction A cut section is shown. この発明の地下灌漑用部材のさらに他の実施例を示す断面図である。It is sectional drawing which shows the further another Example of the member for underground irrigation of this invention. この発明の地下灌漑用部材のさらに他の実施例を示す断面図である。It is sectional drawing which shows the further another Example of the member for underground irrigation of this invention. 図17に示す地下灌漑用部材を用いた地下灌漑システムの一例を示す概略側面図である。It is a schematic side view which shows an example of the underground irrigation system using the member for underground irrigation shown in FIG.

図1−図3を参照して、この発明の一実施例である地下灌漑用部材(以下、単に「部材」と言う。)10は、地下から水を供給して土壌の水分量を適切に保つ地下灌漑システムに用いられる部材である。部材10は、遮水部12および透水部14を含み、地中に埋設されて使用される。   1 to 3, an underground irrigation member (hereinafter simply referred to as “member”) 10 according to an embodiment of the present invention supplies water from underground to appropriately control the moisture content of soil. It is a member used for maintaining underground irrigation systems. The member 10 includes a water-impervious portion 12 and a water-permeable portion 14, and is used by being buried in the ground.

遮水部12は、土壌に供給する水を地中で保持しておくための遮水性を有する部分であり、ポリ塩化ビニル、ポリプロピレンおよびポリエチレン等の合成樹脂などによって、上側開口の溝状に形成される。この実施例では、遮水部12は、可撓性を有する長尺の遮水シートによって、矩形平板状の底板20と、底板20の両側端からやや外側に傾斜して立ち上がる側板22とを有する細長い溝状に形成される。遮水部12の大きさは、地下灌漑システムの規模(耕作地の面積)や栽培する植物の種類などに応じて適宜設定されるが、その長さは、たとえば数m−数百mである。また、遮水部12の幅は、たとえば、下端側(底板20)で120mmであり、その上端側(開口24)で300mmである。また、遮水部12の高さ(側板22の高さ或いは溝の深さ)は、たとえば150mmである。   The water-impervious portion 12 is a portion having a water-impervious property for keeping water supplied to the soil in the ground, and is formed in a groove shape of the upper opening by a synthetic resin such as polyvinyl chloride, polypropylene and polyethylene. Is done. In this embodiment, the water-impervious portion 12 includes a rectangular flat plate-shaped bottom plate 20 and a side plate 22 that rises slightly outward from both side ends of the bottom plate 20 by a long, water-resistant sheet having flexibility. It is formed in an elongated groove shape. Although the magnitude | size of the water-impervious part 12 is suitably set according to the scale (area of cultivated land) of an underground irrigation system, the kind of plant to grow, etc., the length is several m-several hundred m, for example. . Moreover, the width | variety of the water-impervious part 12 is 120 mm at the lower end side (bottom plate 20), for example, and is 300 mm at the upper end side (opening 24). Further, the height of the water shielding portion 12 (the height of the side plate 22 or the depth of the groove) is, for example, 150 mm.

透水部14は、遮水部12内への水の供給および遮水部12内の余剰水の排水を行う通水空間26を遮水部12の内面側に形成するための部分であり、ポリエステル、ポリプロピレンおよびポリエチレン等の合成樹脂などによって、遮水部12の内面に対して一体的に形成される。透水部14は、防根性および透水性を有する、つまり植物の根よりは小さい(根が入り込むことはできない)が水は無加圧で通過する微細な孔を有している。この実施例では、可撓性を有する長尺の防根透水シートの両側縁部を遮水部12の側板22の内面側上部に融着または接着することによって、両側縁部28が遮水部12と一体化された、遮水部12の長手方向の全長に亘って延びる断面円弧状の透水部14を形成している。透水部14の下端は、遮水部12の底面(内面側最下面)30よりも、たとえば50−100mm高い位置に設けられる。なお、防根透水シートとしては、不織布や織布などの布製の市販品(たとえば、東洋紡スペシャルティズトレーディング株式会社製の防根透水シートBKS0812や、ユニチカ株式会社製の防根用透水性不織布−ラブシート20704FLDなど)を利用可能である。   The water permeable part 14 is a part for forming a water flow space 26 for supplying water into the water shielding part 12 and draining excess water in the water shielding part 12 on the inner surface side of the water shielding part 12. The inner surface of the water shielding portion 12 is integrally formed with a synthetic resin such as polypropylene and polyethylene. The water permeable portion 14 has root prevention and water permeability, that is, smaller than the root of the plant (the root cannot enter), but has fine holes through which water passes without pressure. In this embodiment, both side edges 28 of the long root-proof water-permeable sheet having flexibility are fused or bonded to the upper part on the inner surface side of the side plate 22 of the water-shielding part 12 so that the both-side edges 28 become the water-shielding part. A water-permeable portion 14 having an arc-shaped cross section extending over the entire length in the longitudinal direction of the water-impervious portion 12 is formed. The lower end of the water permeable portion 14 is provided at a position higher by 50-100 mm, for example, than the bottom surface (inner surface side lowermost surface) 30 of the water shielding portion 12. In addition, as the water-proof permeable sheet, commercially available products made of cloth such as non-woven fabric and woven fabric (for example, water-proof permeable sheet BKS0812 manufactured by Toyobo Specialty Trading Co., Ltd., and water-proof non-woven fabric for root-proof manufactured by Unitika Co., Ltd.) Sheet 20704FLD) can be used.

また、透水部14の内部、つまり通水空間26には、透水部14の形状を保持して通水空間26の閉塞を防止するための空間保持部16が設けられる。この実施例では、透水部14内に挿通したエンボスシート32を空間保持部16として用いている。図3に示すように、エンボスシート32は、ポリ塩化ビニル、ポリプロピレンおよびポリエチレン等の合成樹脂などによって形成され、可撓性を有する平板状の基部34に対して複数の突起部36が形成された形状を有している。エンボスシート32は、可撓性は有するが、突起部36が土圧などの外力に耐え得る強度を有するものである。   In addition, a space holding portion 16 for holding the shape of the water permeable portion 14 and preventing the water permeable space 26 from being blocked is provided in the water permeable portion 14, that is, in the water permeable space 26. In this embodiment, the embossed sheet 32 inserted into the water permeable portion 14 is used as the space holding portion 16. As shown in FIG. 3, the embossed sheet 32 is formed of synthetic resin such as polyvinyl chloride, polypropylene, and polyethylene, and a plurality of protrusions 36 are formed on a flat base 34 having flexibility. It has a shape. The embossed sheet 32 is flexible, but has a strength that allows the protrusion 36 to withstand external force such as earth pressure.

ただし、空間保持部16は、土圧などの外力による通水空間26の閉塞を防止することができるものであれば特に限定されない。たとえば、捲縮をつけた合成樹脂製の繊維を透水部14内に充填するようにし、この繊維を空間保持部16として利用するようにしてもよいし、管壁に複数の貫通孔が形成された合成樹脂製の有孔管、或いはスプリング(コイル)状のものを透水部14内に挿通するようにし、この有孔管やスプリング状のものを空間保持部16として利用するようにしてもよい。また、遮水部12自体にエンボス加工を施して、透水部14内に突出する突起部を形成し、この突起部を空間保持部16として利用するようにしてもよい。さらに、透水部14自体に土圧などの外力に耐え得る強度を持たせ、自身でその形状を保持できるように防根保持部14を形成することもできる。この場合は、空間保持部16を必ずしも設ける必要はない。   However, the space holding part 16 is not particularly limited as long as it can prevent the water flow space 26 from being blocked by an external force such as earth pressure. For example, a crimped synthetic resin fiber may be filled in the water permeable portion 14 and used as the space holding portion 16, or a plurality of through holes may be formed in the tube wall. Alternatively, a perforated tube made of synthetic resin or a spring (coil) shape may be inserted into the water permeable portion 14, and the perforated tube or spring shape may be used as the space holding portion 16. . Further, the water shielding portion 12 itself may be embossed to form a protruding portion that protrudes into the water permeable portion 14, and this protruding portion may be used as the space holding portion 16. Furthermore, the root-proof holding part 14 can be formed so that the water-permeable part 14 itself has a strength capable of withstanding an external force such as earth pressure and the shape can be held by itself. In this case, the space holding part 16 is not necessarily provided.

また、この実施例では、遮水部12、透水部14および空間保持部16のそれぞれが可撓性を有するように形成されているが、可撓性は必ずしも有する必要はない。ただし、部材10の各部分12,14,16が可撓性を有する、つまり部材10が可撓性を有することにより、ドラム等に対して巻き付けることが可能となるので、長尺部材としての供給が可能となる。したがって、たとえば広い耕作地に部材10を適用する場合にも、部材10同士を施工現場で接続して長尺化する必要がなくなるので、施工手間を簡略化できる。   In this embodiment, each of the water-impervious portion 12, the water-permeable portion 14, and the space holding portion 16 is formed to have flexibility. However, the flexibility is not necessarily required. However, since the portions 12, 14, and 16 of the member 10 are flexible, that is, the member 10 is flexible, the member 10 can be wound around a drum or the like. Is possible. Therefore, for example, even when the member 10 is applied to a wide cultivated land, it is not necessary to connect the members 10 to each other at the construction site and make the length of the member 10 longer.

また、遮水部12は、予め溝形の形状を保持できるように形成することもできるが、耕作地への施工時に、遮水部12を上側開口の溝状に変形して埋設するようにすることもできる。たとえば、製造工場においては、図4(A)に示すように遮水部12を平らなシート状に形成しておく。そして、施工現場において、遮水部12の外面形状に沿う溝を耕作地に掘削した後、その耕作地の溝に対して、図4(B)に示すように遮水部12を上側開口の溝形に折り曲げて埋設することにより、土圧によって遮水部12の所望形状を保持するようにしてもよい。このことは、後述の他の実施例の部材10,100においても同様である。遮水部12を平らなシート状に形成する場合には、ドラム等に対して部材10をロール状に巻回して保持することが容易となり、施工時にロール状態から引き出して埋設するようにすればよいので、部材10の搬送および保管などが容易となる。   Moreover, although the water-impervious part 12 can also be formed so that the shape of the groove shape can be held in advance, the water-impervious part 12 is deformed and embedded in the groove shape of the upper opening at the time of construction on the cultivated land. You can also For example, in a manufacturing factory, the water shielding portion 12 is formed in a flat sheet shape as shown in FIG. And in a construction site, after excavating the groove | channel along the outer surface shape of the water-impervious part 12 to a cultivated land, as shown in FIG.4 (B), the water-impermeable part 12 of an upper opening is shown with respect to the groove | channel of the cultivated land. You may make it hold | maintain the desired shape of the water-impervious part 12 by earth pressure by bending and embedding in a groove shape. The same applies to the members 10 and 100 of other embodiments described later. In the case of forming the water-impervious portion 12 in a flat sheet shape, it becomes easy to wind and hold the member 10 around a drum or the like, and if it is drawn out from the roll state during construction, it is embedded. Therefore, the member 10 can be easily transported and stored.

このような部材10は、上述のように地下灌漑システムに用いられる。以下、図5−7を参照して、部材10を用いた地下灌漑システムの一例である地下灌漑システム50について説明する。   Such a member 10 is used in an underground irrigation system as described above. Hereinafter, with reference to FIGS. 5-7, the underground irrigation system 50 which is an example of the underground irrigation system using the member 10 is demonstrated.

図5−7に示すように、地下灌漑システム50は、傾斜を有する耕作地(傾斜地)52に適用されて、地下から水を供給して土壌中の水分を植物の生育にとって適切な状態に保つシステムであり、地中に埋設される部材10を含む。詳細は後述するが、地下灌漑システム50では、通水空間26を通って遮水部12内に供給された水が、毛管水状態または重力水状態の保水土壌部54を遮水部12内に形成する。そして、保水土壌部54に保持した水を毛細管現象によって上側の土壌に浸透させることにより、植物の根圏(作土層)を適切な水分量に保つ。   As shown in FIG. 5-7, the underground irrigation system 50 is applied to a cultivated land (inclined land) 52 having an inclination, and supplies water from the underground to keep moisture in the soil in an appropriate state for growing the plant. The system includes a member 10 embedded in the ground. Although details will be described later, in the underground irrigation system 50, the water supplied into the impermeable portion 12 through the water passage space 26 causes the water retaining soil portion 54 in the capillary water state or the gravity water state to enter the impermeable portion 12. Form. And the rhizosphere (soil-forming layer) of a plant is kept at an appropriate amount of water by allowing the water retained in the water retaining soil part 54 to permeate the upper soil by capillary action.

部材10は、耕作地52の傾斜に沿って畝立てされた畝56ごとに、その長手方向が植物の根圏に沿うように地中に傾斜して埋設され、遮水部12の内部には、土が充填される。なお、図5では、耕作地52に4つの部材10を等間隔に並べて配置しているが、これは単なる例示であり、部材10の配置個数や配置態様などは、耕作地52の広さ等に応じて適宜変更され得る。また、部材10を畝56ごとに配置する必要もなく、複数の畝56がある耕作地52では、2−3本の畝56に1つの割合で部材10を配置してもよい。たとえば、隣り合う部材10同士の間隔は、500−2000mmが好ましく、部材10の上端から地表面までの距離(埋設深さ)は、100mm−800mmが好ましい。   The member 10 is embedded in the ground so that the longitudinal direction thereof is along the root zone of the plant for each ridge 56 erected along the inclination of the cultivated land 52. The soil is filled. In FIG. 5, the four members 10 are arranged at equal intervals on the cultivated land 52, but this is merely an example, and the number and arrangement of the members 10 are the size of the cultivated land 52, etc. It can be appropriately changed depending on Moreover, it is not necessary to arrange | position the member 10 for every ridge 56, and in the cultivation land 52 with several ridges 56, you may arrange | position the member 10 in the ratio of one to 2-3 ridges 56. FIG. For example, the distance between the adjacent members 10 is preferably 500 to 2000 mm, and the distance (embedding depth) from the upper end of the member 10 to the ground surface is preferably 100 mm to 800 mm.

部材10の透水部14の上流側端部は、第1配水管58を介して、部材10よりも傾斜上側に配置された給水源に接続される。また、遮水部12の上流側端部は、板状の封止部材(図示せず)等によって適宜封止される。第1配水管58は、給水源から供給された水を透水部14まで送る管路であり、複数の直管、可撓管および継手などを適宜連結して形成される。給水源は、耕作地52に供給するための水を貯留する給水タンク60を含む。給水タンク60は、たとえば地上に設置され、農業用水配管などと接続されて、農業用水配管などから送られてくる水をその内部に水を貯留する。つまり、この地下灌漑システム50では、第1配水管58および給水タンク60が通水空間26に対して水を供給する給水部材として機能する。   The upstream end portion of the water permeable portion 14 of the member 10 is connected to a water supply source disposed on the inclined upper side of the member 10 via the first water distribution pipe 58. Further, the upstream end portion of the water shielding portion 12 is appropriately sealed with a plate-like sealing member (not shown) or the like. The 1st water distribution pipe 58 is a pipe line which sends the water supplied from the water supply source to the water permeable part 14, and is formed by connecting a some straight pipe, a flexible pipe, a coupling, etc. suitably. The water supply source includes a water supply tank 60 that stores water to be supplied to the cultivated land 52. The water supply tank 60 is installed on the ground, for example, is connected to an agricultural water pipe or the like, and stores the water sent from the agricultural water pipe or the like in the water. That is, in the underground irrigation system 50, the first water distribution pipe 58 and the water supply tank 60 function as a water supply member that supplies water to the water flow space 26.

一方、透水部14の下流側端部は、第2配水管62を介して、部材10よりも傾斜下側に配置された貯水タンク64に接続される。また、遮水部12の下流側端部は、板状の封止部材(図示せず)等によって適宜封止される。第2配水管62は、透水部14から送られてきた余剰水を貯水タンク64まで送る管路であり、複数の直管、可撓管および継手などを適宜連結して形成される。貯水タンク64は、たとえば地中に設置され、第2配水管62から送られてくる余剰水をその内部に貯留する。   On the other hand, the downstream end portion of the water permeable portion 14 is connected to a water storage tank 64 disposed below the member 10 via the second water distribution pipe 62. Further, the downstream end portion of the water shielding portion 12 is appropriately sealed with a plate-shaped sealing member (not shown) or the like. The 2nd water distribution pipe 62 is a pipe line which sends the surplus water sent from the water permeable part 14 to the water storage tank 64, and is formed by connecting a some straight pipe, a flexible pipe, a coupling, etc. suitably. The water storage tank 64 is installed in the ground, for example, and stores excess water sent from the second water distribution pipe 62 therein.

図示は省略するが、貯水タンク64内に貯水した水は、適宜再利用することが可能である。たとえば、ソーラー型循環ポンプなどを設けて、貯水タンク64内の水を給水タンク60に戻すようにしたり、作業員がタンクローリー車等で貯水タンク64内の水を運搬して、給水タンク60に戻すようにしたりすることによって、再利用するとよい。また、たとえば、耕作地52よりも傾斜下側の耕作地に適用した別の地下灌漑システムの給水タンクに対して貯水タンク64を接続し、貯水タンク64内の水を別システムの給水に再利用することもできる。このように貯水タンク64内の水を再利用することで、水の無駄使いを低減できる。   Although illustration is omitted, the water stored in the water storage tank 64 can be reused as appropriate. For example, a solar circulation pump or the like is provided so that the water in the water storage tank 64 is returned to the water supply tank 60, or the worker carries the water in the water storage tank 64 by a tank lorry vehicle and returns it to the water supply tank 60. It is good to reuse by doing so. In addition, for example, a water storage tank 64 is connected to a water supply tank of another underground irrigation system applied to a cultivated land lower than the cultivated land 52, and the water in the water storage tank 64 is reused for water supply of another system. You can also By reusing the water in the water storage tank 64 in this way, wasteful use of water can be reduced.

このような地下灌漑システム50では、灌漑時には、第1配水管58などに設けられたバルブを手動で開け閉めすることによって、給水タンク60に貯留された水が第1配水管58を介して透水部14内に供給される。ただし、電磁弁やタイマ等を利用して、所定の時間帯に自動的に水が供給されるようにしてもよいし、栽培作物の生理的状況や環境状況をモニタリングして水分を補給するようにしてもよい。また、給水タンク60からの取水量を適宜調整して、水が常時供給されるようにしてもよい。   In such an underground irrigation system 50, at the time of irrigation, a valve provided in the first water distribution pipe 58 and the like is manually opened and closed, so that water stored in the water supply tank 60 is permeated through the first water distribution pipe 58. It is supplied into the section 14. However, water may be automatically supplied at a predetermined time using a solenoid valve, timer, etc., or the physiological condition and environmental condition of the cultivated crop may be monitored to replenish water. It may be. Further, the amount of water taken from the water supply tank 60 may be adjusted as appropriate so that water is constantly supplied.

第1配水管58から透水部14(通水空間26)内に流れ込んだ水は、透水部14の上流側部分から順に、透水部14に形成される微細な孔を通って遮水部12内に供給される。また、上流側部分で遮水部12内に供給されなかった水は、透水部14内を通って下流側に順次搬送されて、搬送先の透水部14の微細な孔から遮水部12内に順次供給される。さらに、遮水部12内に供給されずに透水部14の下流側端部まで到達した水は、余剰水として排水され、第2配水管62を介して貯水タンク64に貯留される。   The water that has flowed into the water permeable portion 14 (water flow space 26) from the first water distribution pipe 58 passes through the minute holes formed in the water permeable portion 14 in order from the upstream side portion of the water permeable portion 14 and enters the water shielding portion 12. To be supplied. Further, the water that has not been supplied into the impermeable portion 12 at the upstream side portion is sequentially conveyed downstream through the water permeable portion 14, and the inside of the impermeable portion 12 through the fine holes of the water permeable portion 14 at the transport destination. Are sequentially supplied. Furthermore, the water that has reached the downstream end of the permeable portion 14 without being supplied into the impermeable portion 12 is drained as surplus water and stored in the water storage tank 64 via the second water distribution pipe 62.

一方、透水部14から遮水部12内に供給された水は、主として重力水となって遮水部12内の土中を下方に移動していくが、遮水部12によってその移動を阻止されて、重力水または毛管水として遮水部12内に留まる。これにより、遮水部12内に、重力水状態または毛管水状態の保水土壌部54が形成される。その後、保水土壌部54の水は、その上側の土壌に毛細管現象によって徐々に浸透していき、植物の根圏(作土層)に毛管水状態の土壌部66を形成する。   On the other hand, the water supplied from the water permeable part 14 into the water shielding part 12 mainly becomes gravity water and moves downward in the soil in the water shielding part 12, but the water shielding part 12 prevents the movement. Thus, the water stays in the impermeable portion 12 as gravity water or capillary water. As a result, a water retaining soil portion 54 in a gravity water state or a capillary water state is formed in the water shielding portion 12. Thereafter, the water in the water retaining soil portion 54 gradually permeates into the upper soil by a capillary phenomenon, thereby forming a soil portion 66 in a capillary water state in the root zone (soil formation layer) of the plant.

なお、透水部14内の水は、遮水部12内に上流側から順次供給されるが、透水部14内の通水空間26は、遮水部12内の土中の空隙よりも通水抵抗が小さいため、水の一部は透水部14内を通って適切に下流側にも搬送される。また、保水土壌部54の水位68が遮水部12内の水位に達すると、透水部14内から遮水部12内への水の移動は止まるので、定常状態においては、保水土壌部54の水位68は、透水部14内の水位とほぼ同じ一定の水位に保たれる。すなわち、給水タンク60からの給水が行われているときには、保水土壌部54の水位、つまり遮水部12内で保持される水の量は、遮水部12の全長に亘ってほぼ一定に保たれるので、その上側の土壌(土壌部66)の毛管水の量も一定に保たれる。   The water in the water permeable part 14 is sequentially supplied from the upstream side into the water impermeable part 12, but the water flow space 26 in the water permeable part 14 is more water permeable than the voids in the soil in the water impermeable part 12. Since the resistance is small, a part of the water is appropriately transported to the downstream side through the water permeable portion 14. In addition, when the water level 68 of the water retaining soil part 54 reaches the water level in the impermeable part 12, the movement of water from the water permeable part 14 into the impermeable part 12 stops, so that in the steady state, The water level 68 is maintained at a constant water level that is substantially the same as the water level in the water permeable portion 14. That is, when water is supplied from the water supply tank 60, the water level of the water retaining soil portion 54, that is, the amount of water held in the water shielding portion 12 is kept substantially constant over the entire length of the water shielding portion 12. Therefore, the amount of capillary water in the upper soil (soil portion 66) is also kept constant.

また、部材10は傾斜させて埋設されるので、保水土壌部54の水は、遮水部12内を徐々に下流側に移動することになるが、この移動速度は、土の抵抗があるため遅い。このため、給水タンク60からの給水の停止後も、保水土壌部54の水は、遮水部12内に一定時間保持され、その間に上側の土壌に毛管水として吸い上げられる。したがって、上側の土壌部66の毛管水の量は、給水の停止後も長時間に亘って一定に保たれる。なお、遮水部12内を下流側に移動する水により、下流側部分で保水土壌部54の水位が通水空間26の下端の位置よりも高くなった場合は、遮水部12内から透水部14内に水が移動する。透水部14内に移動した水は、余剰水として貯水タンク64に運ばれて貯留されるので、水の無駄使いは発生しない。   In addition, since the member 10 is embedded in an inclined state, the water in the water retaining soil portion 54 gradually moves downstream in the water shielding portion 12, but this moving speed is due to soil resistance. slow. For this reason, even after the water supply from the water supply tank 60 is stopped, the water in the water retaining soil portion 54 is retained in the water shielding portion 12 for a certain period of time, and is sucked up into the upper soil as capillary water. Therefore, the amount of capillary water in the upper soil portion 66 is kept constant for a long time after the water supply is stopped. In addition, when the water level of the water retaining soil part 54 becomes higher than the position of the lower end of the water flow space 26 in the downstream part due to the water moving downstream in the water shielding part 12, the water permeability from the inside of the water shielding part 12. Water moves into the section 14. Since the water that has moved into the water permeable portion 14 is transported and stored in the water storage tank 64 as surplus water, there is no wasteful use of water.

上述のように、地下灌漑システム50では、土壌に供給する水を遮水部12内で保持しておき、そこから毛細管現象によって上側の土壌に供給するようにしている。そして、遮水部12内で保持される水の量は、その全長に亘ってほぼ一定に保たれるので、上側の土壌に対する水の供給が一部に偏ることなく、植物の根圏に対して略均等に灌水できる。また、水位管理器を用いる必要がないので、システムが簡略化され、コストも削減できる。   As described above, in the underground irrigation system 50, the water to be supplied to the soil is held in the water-impervious portion 12, and is supplied from there to the upper soil by capillary action. And since the quantity of the water hold | maintained in the water-impervious part 12 is maintained substantially constant over the full length, supply of the water with respect to an upper soil is not biased to a part, with respect to the root zone of a plant Can be evenly irrigated. Further, since it is not necessary to use a water level controller, the system is simplified and the cost can be reduced.

また、地下灌漑システム50では、降雨時には、地中に浸透した雨水が遮水部12によって受け止められ、遮水部12内に貯留される。そして、遮水部12内の水位が通水空間26の下端を超えると、遮水部12内の水は、透水部14の微細な孔を通って透水部14内に流入する。透水部14内に流入した水は、透水部14内を通って余剰水として排水され、第2配水管62を介して貯水タンク64に貯留される。つまり、透水部14内の通水空間26は、土壌に供給する水を遮水部12の全長に亘って搬送する給水路として用いられると共に、土壌または遮水部12内に発生した余剰水を集めて排水する排水路として用いられる。換言すれば、部材10は、地中から土壌に対して水を供給する灌水部材として機能すると共に、雨水を集水する集水部材としても機能すると言える。地下灌漑システム50によれば、雨水を集水して再利用することもできるので、水資源を効率的に利用できる。   Further, in the underground irrigation system 50, rainwater that has penetrated into the ground is received by the impermeable portion 12 and stored in the impermeable portion 12 during rainfall. And if the water level in the water-impervious part 12 exceeds the lower end of the water-permeable space 26, the water in the water-impervious part 12 flows into the water-permeable part 14 through the fine holes of the water-permeable part 14. The water that has flowed into the water permeable portion 14 passes through the water permeable portion 14 and is drained as surplus water, and is stored in the water storage tank 64 via the second water distribution pipe 62. That is, the water flow space 26 in the water permeable portion 14 is used as a water supply channel for transporting water supplied to the soil over the entire length of the water shielding portion 12, and excess water generated in the soil or the water shielding portion 12. Used as a drainage channel to collect and drain. In other words, it can be said that the member 10 functions as an irrigation member that supplies water to the soil from the ground and also functions as a water collecting member that collects rainwater. According to the underground irrigation system 50, rainwater can be collected and reused, so that water resources can be used efficiently.

ここで、このような地下灌漑システム50を用いて植物を栽培すると、植物の根圏の土壌の水分量が適切に保たれるので、植物は大きく成長する。図8に示すように、植物の根70は、水分が豊富に存在する場所を目指して伸びる傾向にあるので、生育した植物の根70が保水土壌部54および透水部14の位置まで伸びてくる場合がある。このような場合でも、部材10では、通水空間26を形成する透水部14の両側縁部28が遮水部12と一体化されている、つまり透水部14の周囲に回り込む経路の一部が遮水部12によって分断されているので、透水部14の周方向への根70の伸長は、遮水部12によって阻止される。このため、透水部14(通水空間26)の全周に根が回り込んで互いに絡まり合う状態となることがない。また、部材10では、透水部14が防根機能を有するので、根による透水部14の孔の詰まりも生じない。   Here, when a plant is cultivated using such an underground irrigation system 50, the water content of the soil in the rhizosphere of the plant is appropriately maintained, so that the plant grows greatly. As shown in FIG. 8, the plant root 70 tends to extend toward a place where water is abundant, so the grown plant root 70 extends to the position of the water retaining soil portion 54 and the water permeable portion 14. There is a case. Even in such a case, in the member 10, both side edge portions 28 of the water permeable portion 14 forming the water passage space 26 are integrated with the water shielding portion 12, that is, a part of the path that goes around the water permeable portion 14 is partly formed. Since it is divided by the water-impervious portion 12, the extension of the root 70 in the circumferential direction of the water-permeable portion 14 is prevented by the water-impervious portion 12. For this reason, a root does not wrap around the perimeter of the water permeable part 14 (water flow space 26), and it will not be in a state where it mutually tangles. Moreover, in the member 10, since the water permeable part 14 has a root prevention function, the hole of the water permeable part 14 by the root does not clog.

この実施例の部材10によれば、通水空間26を形成する遮水部12が透水部14の周方向への根の伸長を阻止する機能を発揮するので、透水部14に対する根の巻き付きを防止できる。したがって、耕運時や植物の収穫時などに、巻き付いた根ごと部材10が引き抜かれて、地下灌漑システム50が破損してしまうことを防止できる。また、透水部14が防根機能を有するので、根による透水部14の孔の詰まりが防止され、透水部14から遮水部12内への水の供給を適切に行うことができる。   According to the member 10 of this embodiment, the water-impervious portion 12 that forms the water-permeable space 26 exerts a function of preventing the root from extending in the circumferential direction of the water-permeable portion 14. Can be prevented. Therefore, it is possible to prevent the underground irrigation system 50 from being damaged by pulling out the wound root and the member 10 when cultivating or harvesting a plant. Moreover, since the water permeable part 14 has a root prevention function, clogging of the hole of the water permeable part 14 by a root is prevented, and the water supply from the water permeable part 14 into the water shielding part 12 can be performed appropriately.

また、部材10では、遮水部12と通水空間26を形成する透水部14とが一体的に形成されるので、遮水部材と有孔管とを別々に施工する従来の地下灌漑システムと比較して、施工手間が簡略化される。また、部材コストも低減できる。   Further, in the member 10, since the water-impervious portion 12 and the water-permeable portion 14 forming the water flow space 26 are integrally formed, the conventional underground irrigation system in which the water-impervious member and the perforated pipe are separately constructed and In comparison, the construction labor is simplified. Moreover, member cost can also be reduced.

さらに、部材10では、可撓性を有する遮水シートによって遮水部12を形成し、透水部14を遮水部12の内面側上部に設けている。このため、図9に示すように、耕作地の土中の一部に岩盤72や埋設管74などの障害物がある場合でも、透水部14に影響を与えることなく遮水部12が変形するだけで障害物を回避でき、透水部14の架空設置が可能となる。したがって、透水部14(通水空間26)を一定の勾配で配置することが容易となる。また、深掘削による障害物の取り除き等の地盤改良が不要となる。   Further, in the member 10, the water shielding portion 12 is formed by a flexible water shielding sheet, and the water permeable portion 14 is provided on the inner surface side upper portion of the water shielding portion 12. For this reason, as shown in FIG. 9, even when there is an obstacle such as the rock 72 or the buried pipe 74 in a part of the soil of the cultivated land, the water shielding portion 12 is deformed without affecting the water permeable portion 14. Obstacles can be avoided only by this, and the water-permeable part 14 can be installed overhead. Therefore, it becomes easy to arrange the water permeable part 14 (water flow space 26) with a fixed gradient. In addition, ground improvement such as removal of obstacles by deep excavation becomes unnecessary.

なお、上述の地下灌漑システム50では、その長手方向が耕作地52の傾斜に沿うように部材10を埋設しているが、これに限定されない。たとえば、その長手方向が耕作地52の傾斜方向からずれるように部材10を配置してもよいし、耕作地52の勾配よりも大きいまたは小さい勾配で傾斜させて部材10を埋設するようにしてもよい。また、部材10は、基本的には耕作地52の地中に所定勾配で傾斜させて埋設されるが、水平(略水平を含む)に埋設することもできる。つまり、耕作地52の傾斜に直交する方向に沿って部材10を水平に埋設することもできるし、傾斜地ではなく、平坦な耕作地(水平地)に適用される地下灌漑システムに部材10を用いることもできる。   In addition, in the above-mentioned underground irrigation system 50, although the member 10 is embed | buried so that the longitudinal direction may follow the inclination of the cultivated land 52, it is not limited to this. For example, the member 10 may be arranged such that the longitudinal direction thereof deviates from the inclination direction of the cultivated land 52, or the member 10 may be embedded while being inclined with a gradient larger or smaller than the gradient of the cultivated land 52. Good. In addition, the member 10 is basically embedded in the ground of the cultivated land 52 with a predetermined gradient, but can also be embedded horizontally (including substantially horizontal). That is, the member 10 can be embedded horizontally along a direction orthogonal to the inclination of the cultivated land 52, and the member 10 is used for an underground irrigation system applied to a flat cultivated land (horizontal land) instead of an inclined land. You can also

また、部材10は、基本的には直線状に配置されるが、蛇行するように配置してもよい。さらに、耕作地52全体に万遍なく部材10を配置することによって、耕作地52の作土層全体を毛管水状態の土壌部66とすることもできるし、耕作地52の一部の範囲に部材10を配置することによって、耕作地52の作土層の一部の範囲のみ、つまり耕作者が望む範囲のみを毛管水状態の土壌部66とすることもできる。   The member 10 is basically arranged in a straight line, but may be arranged to meander. Furthermore, by disposing the member 10 uniformly throughout the cultivated land 52, the entire soil layer of the cultivated land 52 can be used as a soil portion 66 in a capillary water state, or within a part of the cultivated land 52. By disposing the member 10, only a partial range of the soil layer of the cultivated land 52, that is, only a range desired by the cultivator can be set as the soil portion 66 in the capillary water state.

また、上述の地下灌漑システム50では、遮水部12内に土を充填するようにしたが、遮水部12内、好ましくは透水部14の下端よりも下側の空間には、土よりも保水性の高い材料を充填するようにしてもよい。土よりも保水性の高い材料としては、たとえば、ポリアクリル酸ナトリウムなどの高吸水性高分子からなる汎用の保水材や、そのような保水材と土とを混合した混合物を用いるとよい。このように、遮水部12内に土よりも保水性の高い材料を充填することにより、部材10を傾斜させて設置しても、保水土壌部54の水の下流方向への移動がより遅くなる。したがって、遮水部12内で保持される水の量がその全長に亘ってほぼ一定に保たれ、上側の土壌部66に対する水の供給が一部に偏ることなく、植物の根圏に対してより均等に灌水できる。   Moreover, in the above-mentioned underground irrigation system 50, soil is filled in the water-impervious portion 12, but in the water-impervious portion 12, preferably in a space below the lower end of the water-permeable portion 14, than the soil. You may make it fill with a material with high water retention. As a material having higher water retention than soil, for example, a general-purpose water retention material composed of a highly water-absorbing polymer such as sodium polyacrylate or a mixture of such a water retention material and soil may be used. Thus, even if the member 10 is inclined and installed by filling the water-impervious portion 12 with a material having higher water retention capacity than the soil, the movement of the water retention soil portion 54 in the downstream direction of water is slower. Become. Therefore, the amount of water retained in the water-impervious portion 12 is kept substantially constant over the entire length, and the supply of water to the upper soil portion 66 is not partially biased with respect to the root zone of the plant. Water can be evenly distributed.

また、遮水部12内に充填する材料を、下層から順に、礫層、砂層、およびシルト層を形成するというように複層状態にして、上側の土壌に対して毛管水が移動し易いようにすることもできる。   Further, the material to be filled in the water-impervious portion 12 is made into a multi-layer state such that a gravel layer, a sand layer, and a silt layer are formed in order from the lower layer so that the capillary water can easily move with respect to the upper soil. It can also be.

また、上述の地下灌漑システム50では、土壌に水のみを供給するようにしているが、たとえば給水タンク60内の水に肥料を溶かして、水とともに肥料を部材10から土壌(作物)に供給するようにしてもよい。   In the above-described underground irrigation system 50, only water is supplied to the soil. For example, fertilizer is dissolved in water in the water supply tank 60, and the fertilizer is supplied to the soil (crop) from the member 10 together with water. You may do it.

さらに、上述の地下灌漑システム50では、部材10の上流側に給水タンク60を設け、下流側に貯水タンク64を設けるようにしたが、給水タンク60および貯水タンク64は、必ずしも設ける必要はない。たとえば、給水タンク60を設けることなく、農業用配水管などに第1配水管58を直接接続するようにしてもよい。   Further, in the above-described underground irrigation system 50, the water supply tank 60 is provided on the upstream side of the member 10, and the water storage tank 64 is provided on the downstream side. However, the water supply tank 60 and the water storage tank 64 are not necessarily provided. For example, the first water distribution pipe 58 may be directly connected to an agricultural water distribution pipe or the like without providing the water supply tank 60.

また、貯水タンク64の代わりに、部材10の下流側にため池などを形成しておき、このため池を貯水部として利用してもよい。さらに、貯水タンク64やため池などの貯水部を設けることなく、透水部14の下流側端部を排水管に接続し、この排水管を介して下水処理施設などへ余剰水を排出するようにしてもよい。また、第2配水管62や貯水タンク64を設けることなく、透水部14の下流側端部から土壌に余剰水を排水し、そのまま余剰水を地下深くに浸透させるようにしてもよい。余剰水を排水する場合には、水資源を有効利用できるという効果は小さくなるが、部材コストや維持管理コストなどのコストを削減できる。   Further, instead of the water storage tank 64, a pond or the like may be formed on the downstream side of the member 10, and the pond may be used as a water storage section. Further, without providing a water storage section such as a water storage tank 64 or a reservoir, the downstream end of the water permeable section 14 is connected to a drain pipe, and excess water is discharged to a sewage treatment facility or the like through the drain pipe. Also good. Moreover, without providing the 2nd water distribution pipe 62 or the water storage tank 64, you may make it permeate | transmit deep water as it is by draining surplus water to the soil from the downstream end part of the water permeable part 14. When surplus water is drained, the effect that water resources can be used effectively is reduced, but costs such as member costs and maintenance costs can be reduced.

続いて、各図を適宜参照して、この発明の他の実施例について説明する。なお、上述の実施例と同様の部分については、同じ参照番号を用い、その説明を省略或いは簡略化する。   Subsequently, another embodiment of the present invention will be described with reference to each drawing as appropriate. The same reference numerals are used for the same parts as in the above-described embodiment, and the description thereof is omitted or simplified.

上述の実施例では、側板22がやや外側に傾斜して立ち上がる断面台形状に遮水部12を形成しているが、これに限定される必要はない。遮水部12は、上側開口の溝状に形成され、地中で水を保持できる形状であれば、適宜の形状を適用可能である。たとえば、側板22が底板20から垂直に立ち上がる断面矩形状に遮水部12を形成することもできるし、遮水部12を半円筒状に形成することもできる。ただし、遮水部12の上側の開口24の幅を広げるようにすれば、その分だけ土壌に浸み込んだ雨水の集水能力が増すので、水資源をより効率的に利用することが可能になる。   In the above-described embodiment, the water shielding portion 12 is formed in a trapezoidal shape in which the side plate 22 rises slightly inclined outward, but it is not necessary to be limited to this. As long as the water-impervious portion 12 is formed in a groove shape of the upper opening and can hold water in the ground, an appropriate shape can be applied. For example, the water shielding part 12 can be formed in a rectangular cross section in which the side plate 22 rises vertically from the bottom plate 20, or the water shielding part 12 can be formed in a semi-cylindrical shape. However, if the width of the opening 24 on the upper side of the water-impervious portion 12 is widened, the ability to collect rainwater soaked in the soil will increase, so water resources can be used more efficiently. become.

また、透水部14の微細な孔は、基本的には透水部14の全面に万遍なく一様に形成されるものであるが、必ずしもこれに限定される必要はなく、たとえば、長手方向の一定間隔ごと、または不規則的に微細な孔が形成されない範囲があってもよい。   In addition, the fine holes of the water permeable portion 14 are basically uniformly formed on the entire surface of the water permeable portion 14, but are not necessarily limited thereto. There may be a range where fine holes are not formed at regular intervals or irregularly.

また、上述の実施例では、透水部14を遮水部12の側板22の内面側上部に設けているが、これに限定されず、透水部12の位置は、遮水部12の内面側であれば任意に変更可能である。さらに、透水部14の形状は、通水空間26を形成できる形状であれば、特に限定されない。   Moreover, in the above-mentioned Example, although the water permeable part 14 is provided in the inner surface side upper part of the side plate 22 of the water shielding part 12, it is not limited to this, The position of the water permeable part 12 is the inner surface side of the water shielding part 12 Any change is possible. Furthermore, if the shape of the water permeable part 14 is a shape which can form the water flow space 26, it will not be specifically limited.

たとえば、図10に示すように、透水部14を遮水部12の側板22の内面側最上部よりも低い位置に設けることもできる。   For example, as shown in FIG. 10, the water permeable part 14 can be provided at a position lower than the uppermost part on the inner surface side of the side plate 22 of the water shielding part 12.

また、たとえば、図11に示すように、遮水部12の底板20の中央部に対して断面台形状の底上げ部76を形成し、その底上げ部76の上面(つまり遮水部12の内面)に透水部14を設けることもできる。なお、図11に示す実施例の場合には、底上げ部76の両側に2つの土壌部54が形成されることになる。   Further, for example, as shown in FIG. 11, a bottom raised portion 76 having a trapezoidal cross section is formed with respect to the central portion of the bottom plate 20 of the water shielding portion 12, and the upper surface of the bottom raised portion 76 (that is, the inner surface of the water shielding portion 12). The water permeable part 14 can also be provided. In the case of the embodiment shown in FIG. 11, two soil portions 54 are formed on both sides of the bottom raised portion 76.

また、たとえば、図12に示すように、遮水部12の側板22上部に対して外側に突出する溝部78を形成し、その溝部78を覆うように透水部14を設けることもできる。この場合にも、遮水部12の内面と一体に設けられた透水部14が通水空間26を形成している。   Further, for example, as shown in FIG. 12, a groove portion 78 protruding outward with respect to the upper portion of the side plate 22 of the water shielding portion 12 can be formed, and the water permeable portion 14 can be provided so as to cover the groove portion 78. Also in this case, the water permeable portion 14 provided integrally with the inner surface of the water shielding portion 12 forms a water passage space 26.

さらに、上述の実施例では、遮水部12に対して1つの透水部14(通水空間26)を設けているが、これに限定されず、遮水部12に対して複数の透水部14を設けることもできる。たとえば、図13に示すように、遮水部12の側板22のそれぞれに透水部14を設けることもできる。また、図示は省略するが、図11に示す実施例のような遮水部12の場合には、底上げ部76に透水部14を設けると共に、側板22のそれぞれに透水部14を設けるようにしてもよい。このように複数の透水部14を設ける場合には、たとえば、第1配水管58は、1つの透水部14に接続される。そして、供給される水に含まれる不純物や土壌中の泥成分などが原因となって、通水空間26や透水部14の微細な孔が詰まる等してしまい、使用中の透水部14が灌水部や集水部として機能しなくなってしまったときに、第1配水管58を残りの透水部14に接続し直すようにするとよい。このように、複数の透水部14を遮水部12に設けておく、つまり予備の透水部14を有することによって、部材10の寿命を延ばすことができる。   Furthermore, in the above-mentioned Example, although the one water permeable part 14 (water-permeable space 26) is provided with respect to the water impermeable part 12, it is not limited to this, The some water permeable part 14 with respect to the water impermeable part 12 is provided. Can also be provided. For example, as shown in FIG. 13, a water permeable portion 14 may be provided on each of the side plates 22 of the water shielding portion 12. Although not shown, in the case of the water shielding part 12 as in the embodiment shown in FIG. 11, the water permeable part 14 is provided in the bottom raised part 76 and the water permeable part 14 is provided in each of the side plates 22. Also good. Thus, when providing the some water permeable part 14, the 1st water distribution pipe 58 is connected to the one water permeable part 14, for example. Then, due to impurities contained in the supplied water, mud components in the soil, and the like, the fine holes in the water flow space 26 and the water permeable portion 14 are clogged, and the water permeable portion 14 in use is irrigated. The first water distribution pipe 58 may be reconnected to the remaining water permeable part 14 when it no longer functions as a water collecting part or a water collecting part. In this way, the life of the member 10 can be extended by providing the plurality of water permeable portions 14 in the water shielding portion 12, that is, by having the spare water permeable portions 14.

また、図14に示すように、遮水部12の側縁部に鍔部80を設けるようにしてもよい。鍔部80は、合成樹脂などの遮水性を有する材質によって形成され、遮水部12の全長に亘るように側板22の上端から鍔状に外側に延びる。遮水部12(土壌部54)内の水は、その上側の土壌に毛細管現象によって吸い上げられて、遮水部12の上部およびその周辺の土壌へと浸透していくが、遮水部12に鍔部80を設けておくことによって、鍔部80がその下方の土壌への毛管水の浸透を遮断する。つまり、下方に向かって浸透していく毛管水の量を低減させるので、毛管水は横方向ないし上方向に浸透していくことになる。これによって、使用する水の量を低減させつつ、横方向に広範囲に広がる毛管水状態の土壌部66を形成することができるようになる。また、降雨時には、鍔部80が地中に浸透した雨水を受け止めて遮水部12内に導くこともできるので、雨水をより効率的に集水することが可能になる。   Moreover, as shown in FIG. 14, you may make it provide the collar part 80 in the side edge part of the water-impervious part 12. As shown in FIG. The flange 80 is formed of a material having a water shielding property such as a synthetic resin, and extends outward from the upper end of the side plate 22 in a bowl shape so as to extend over the entire length of the water shielding portion 12. The water in the water-impervious portion 12 (soil portion 54) is sucked up by the capillarity to the upper soil and permeates into the upper portion of the water-impervious portion 12 and the surrounding soil. By providing the ridge portion 80, the ridge portion 80 blocks the penetration of capillary water into the soil below it. That is, since the amount of capillary water penetrating downward is reduced, the capillary water penetrates laterally or upward. As a result, it is possible to form the soil portion 66 in a capillary water state that spreads widely in the lateral direction while reducing the amount of water to be used. In addition, at the time of rainfall, the rainwater 80 permeates into the ground and can be guided into the water shielding portion 12, so that rainwater can be collected more efficiently.

さらに、図15に示すように、遮水部12には、遮水部12の内面側底部の空間を区画する複数の仕切部82を設けるようにしてもよい。仕切部82は、たとえば、合成樹脂などの遮水性を有する材質によって形成され、遮水部12の長手方向の所定間隔ごとに、遮水部12の内面から突出する平板状に形成される。隣り合う仕切部82の間隔は、耕作地52の勾配に応じて適宜設定されるが、たとえば1mとされ、その高さは、たとえば透水部14の下端位置までの高さとされる。このような仕切部82を設けることにより、保水土壌部54の水の下流方向への移動がより抑制されるので、遮水部12内で保持される水の量がその全長に亘ってほぼ一定に保たれる。したがって、上側の土壌部66に対する水の供給が一部に偏ることなく、植物の根圏に対してより均等に灌水できる。なお、仕切部82は、必ずしも遮水部12の内面から突出させるように形成する必要はなく、たとえば、遮水部12の長手方向の所定間隔ごとに、遮水部12の底板20および側板22下部を上側に湾曲させて仕切部82を形成することもできる。   Further, as shown in FIG. 15, the water shielding portion 12 may be provided with a plurality of partition portions 82 that partition the space on the inner surface side bottom portion of the water shielding portion 12. The partition part 82 is formed of, for example, a material having water shielding properties such as synthetic resin, and is formed in a flat plate shape protruding from the inner surface of the water shielding part 12 at every predetermined interval in the longitudinal direction of the water shielding part 12. Although the space | interval of the adjacent partition part 82 is suitably set according to the gradient of the cultivated land 52, it is 1 m, for example, and the height is made into the height to the lower end position of the water permeable part 14, for example. By providing such a partition part 82, the movement of the water retaining soil part 54 in the downstream direction of water is further suppressed, so that the amount of water retained in the water shielding part 12 is substantially constant over its entire length. To be kept. Therefore, the water supply to the upper soil portion 66 can be evenly irrigated with respect to the rhizosphere of the plant without being partially biased. In addition, the partition part 82 does not necessarily need to be formed so as to protrude from the inner surface of the water shielding part 12. For example, the bottom plate 20 and the side plate 22 of the water shielding part 12 are provided at predetermined intervals in the longitudinal direction of the water shielding part 12. The partition part 82 can also be formed by curving the lower part upward.

また、図16に示すように、遮水部12を上側開口の複数の溝を有するように形成し、それら溝のそれぞれに透水部14を設けるようにすることもできる。つまり、上側開口の溝状とは、1つの溝を有するものに限定されるものではなく、複数の溝を有するものも含まれる。たとえば、遮水部12は、幅方向に凹凸を繰り返す波形状に形成される。この場合、遮水部12の溝(凹部)のそれぞれに、保水土壌部54が形成されることになる。もちろん、図1および図10−15に示した部材10の遮水部12の側縁部同士を適宜連結して1つの部材10とすることもできる。   Moreover, as shown in FIG. 16, the water-impervious portion 12 may be formed to have a plurality of grooves in the upper opening, and a water-permeable portion 14 may be provided in each of the grooves. That is, the groove shape of the upper opening is not limited to one having a single groove, but includes one having a plurality of grooves. For example, the water-impervious portion 12 is formed in a wave shape that repeats unevenness in the width direction. In this case, the water retaining soil portion 54 is formed in each groove (concave portion) of the water shielding portion 12. Of course, the side edge parts of the water-impervious portion 12 of the member 10 shown in FIG. 1 and FIG.

なお、上述の各実施例では、透水部14を遮水部12の側板22の内面側上部や底板20の底上げ部76などに設けている。つまり、遮水部12の底面(内面側の最下面)より高い位置に透水部14を設けている。これは、遮水部12内の透水部14(通水空間26)より下側の空間に一定の厚みの土の層を形成するためである。これによって、部材10を傾斜させて埋設しても、水を一時的に保持する保水土壌部54が遮水部12内に適切に形成される。   In each of the above-described embodiments, the water permeable portion 14 is provided on the inner surface side upper portion of the side plate 22 of the water shielding portion 12, the bottom raised portion 76 of the bottom plate 20, or the like. That is, the water permeable portion 14 is provided at a position higher than the bottom surface (the bottom surface on the inner surface side) of the water shielding portion 12. This is because a soil layer having a certain thickness is formed in a space below the water permeable portion 14 (water flow space 26) in the water shielding portion 12. Thereby, even if the member 10 is inclined and embedded, the water retaining soil portion 54 that temporarily holds water is appropriately formed in the water shielding portion 12.

しかし、図17に示す部材100のように、水平(略水平を含む)に埋設されるものであれば、遮水部12の底面(底板22の上面)に対して透水部14を設けることもできる。   However, as long as it is embedded horizontally (including substantially horizontal) as in the member 100 shown in FIG. 17, the water permeable portion 14 may be provided on the bottom surface of the water shielding portion 12 (the upper surface of the bottom plate 22). it can.

このような部材100は、図18に示すように、たとえば平坦な耕作地(水平地)102に適用される地下灌漑システム104に用いられる。この地下灌漑システム104では、通水空間26を通って遮水部12内に供給された水が、重力水状態の保水土壌部106を遮水部12内に形成する。そして、保水土壌部106に保持した水を毛細管現象によって上側の土壌に浸透させることにより、植物の根圏を適切な水分量に保つ。   As shown in FIG. 18, such a member 100 is used in an underground irrigation system 104 applied to, for example, a flat cultivated land (horizontal land) 102. In the underground irrigation system 104, the water supplied into the impermeable portion 12 through the water flow space 26 forms a water retaining soil portion 106 in a gravitational water state in the impermeable portion 12. And the rhizosphere of a plant is maintained by the appropriate moisture content by making the water hold | maintained in the water-retaining soil part 106 permeate | transmit the upper soil by capillary action.

具体的には、部材100は、たとえば、その長手方向が植物の根圏に沿うように地中に水平に埋設され、遮水部12の内部には、土が充填される。部材10の透水部14の上流側端部は、第1配水管58を介して、地上に配置された給水タンク60に接続される。また、遮水部12の上流側端部と、遮水部12および透水部14の下流側端部とは、板状の封止部材(図示せず)等によって適宜封止される。   Specifically, for example, the member 100 is horizontally embedded in the ground so that the longitudinal direction thereof is along the plant rhizosphere, and the interior of the water shielding portion 12 is filled with soil. The upstream end of the water permeable portion 14 of the member 10 is connected to a water supply tank 60 disposed on the ground via a first water distribution pipe 58. Further, the upstream end portion of the water shielding portion 12 and the downstream end portions of the water shielding portion 12 and the water permeable portion 14 are appropriately sealed by a plate-like sealing member (not shown) or the like.

さらに、第1配水管58には、遮水部12内に形成される保水土壌部106の水位を調整するための水位管理器108が設けられる。水位管理器108は、貯水機能を有する縦管110、および縦管110の内部に収容される管理器本体112を含み、縦管108内の水位に応じて水の供給を調整するものである。この地下灌漑システム104では、水位管理器108は、第1配水管58から透水部14内への水の供給を調整することによって、遮水部12内に形成される重力水状態の保水土壌部106の水位114を一定に保つ。水位管理器108としては、公知の水位管理器を適宜使用することができ、たとえば、管理器本体112として、本願出願人が先に出願した特開2008−240934号において提案したものを好適に用いることができる。   Further, the first water distribution pipe 58 is provided with a water level manager 108 for adjusting the water level of the water retaining soil portion 106 formed in the water shielding portion 12. The water level management unit 108 includes a vertical pipe 110 having a water storage function and a management unit main body 112 accommodated in the vertical pipe 110, and adjusts the supply of water according to the water level in the vertical pipe 108. In this underground irrigation system 104, the water level manager 108 adjusts the supply of water from the first water distribution pipe 58 into the water permeable part 14, so that the water retaining soil part in the gravity water state formed in the water shielding part 12. The water level 114 of 106 is kept constant. As the water level controller 108, a known water level controller can be used as appropriate. For example, as the manager body 112, the one proposed in Japanese Patent Application Laid-Open No. 2008-240934 filed earlier by the applicant of the present application is preferably used. be able to.

このような地下灌漑システム104では、灌漑時には、第1配水管58などに設けられたバルブは常に開状態とされる。給水タンク60から第1配水管58を介して透水部14(通水空間26)内に流れ込んだ水は、透水部14内を通って下流側に順次搬送されると共に、透水部14に形成される微細な孔を通って遮水部12内に供給される。遮水部12内に供給された水は、その内部の土中に浸透していき、重力水となって遮水部12内に留まり、重力水状態の保水土壌部106を形成する。この保水土壌部106の重力水の水位114、すなわち遮水部12内の重力水の水位は、水位管理器108の縦管110内の水位と連動しており、縦管110内の水位が所定の水位設定値になると、第1配水管58から透水部14内への給水が停止される。また、遮水部12内の水が上層の土壌に吸い上げられて、重力水の水位114が低下すると、その分だけ第1配水管58から透水部14内への給水が行われる。つまり、遮水部12内の重力水の水位114は、水位管理器108によって、その全長に亘って一定に保たれる。保水土壌部106(遮水部12)に保持された水は、その上側の土壌に毛細管現象によって徐々に浸透していき、植物の根圏(作土層)に毛管水状態の土壌部66を形成する。   In such an underground irrigation system 104, valves provided in the first water distribution pipe 58 and the like are always opened during irrigation. The water that has flowed from the water supply tank 60 into the water permeable portion 14 (water passage space 26) through the first water distribution pipe 58 is sequentially conveyed downstream through the water permeable portion 14 and is formed in the water permeable portion 14. Then, the water is supplied into the water shielding portion 12 through the fine holes. The water supplied into the water-impervious portion 12 penetrates into the soil inside the water-impervious portion 12, becomes gravity water, stays in the water-impervious portion 12, and forms the water retaining soil portion 106 in the state of gravity water. The gravitational water level 114 in the water retaining soil part 106, that is, the gravitational water level in the impermeable part 12 is linked to the water level in the vertical pipe 110 of the water level controller 108, and the water level in the vertical pipe 110 is predetermined. When the water level setting value is reached, water supply from the first water distribution pipe 58 into the water permeable portion 14 is stopped. Moreover, when the water in the impermeable portion 12 is sucked up by the upper soil and the water level 114 of the gravitational water is lowered, water is supplied from the first water distribution pipe 58 into the permeable portion 14 correspondingly. That is, the water level 114 of the gravitational water in the impermeable portion 12 is kept constant over the entire length by the water level manager 108. The water retained in the water-retaining soil part 106 (water-impervious part 12) gradually permeates into the upper soil by capillarity, and the capillary part water-soil part 66 is introduced into the root zone (soil formation layer) of the plant. Form.

図17に示す部材100においても、図1に示す部材10と同様に、通水空間26を形成する遮水部12が透水部14の周方向への根の伸長を阻止する機能を発揮するので、透水部14に対する根の絡まりを防止できる。したがって、耕運時や植物の収穫時などに、絡まった根ごと部材100が引き抜かれて、地下灌漑システム104が破損してしまうことを防止できる。また、透水部14が防根機能を有するので、透水部14の根による詰まりが防止され、透水部14から遮水部12内への水の供給を適切に行うことができる。また、遮水部12と通水空間26を形成する透水部14とが一体的に形成されるので、施工手間が簡略化され、部材コストも低減できる。   In the member 100 shown in FIG. 17 as well, as the member 10 shown in FIG. 1, the water-impervious portion 12 forming the water passage space 26 exhibits a function of preventing the root of the water-permeable portion 14 from extending in the circumferential direction. The root entanglement with respect to the water permeable part 14 can be prevented. Therefore, it is possible to prevent the underground irrigation system 104 from being damaged by pulling out the entangled root member 100 when cultivating or harvesting a plant. Moreover, since the water permeable part 14 has a root prevention function, clogging by the root of the water permeable part 14 is prevented, and water can be appropriately supplied from the water permeable part 14 into the water shielding part 12. Moreover, since the water-permeable part 12 and the water-permeable part 14 which forms the water flow space 26 are integrally formed, construction labor is simplified and member cost can also be reduced.

なお、上述の各実施例では、透水部14は、防根性および透水性を有する、つまり植物の根よりは小さいが水は無加圧で通過する微細な孔を有するように形成しているが、透水部14は、少なくとも透水性を有していればよく、防根性を必ずしも有する必要はない。   In each of the above-described embodiments, the water permeable portion 14 has root prevention and water permeability, that is, is formed so as to have fine holes that are smaller than the roots of the plant but pass water without pressure. The water permeable portion 14 only needs to have at least water permeability, and does not necessarily have root-proofing properties.

また、上で挙げた寸法や配置態様などに関する具体的数値は、いずれも単なる一例であり、製品の仕様および適用する耕作地の面積、土壌成分および気候条件などに応じて、適宜変更可能である。   In addition, the specific numerical values related to the dimensions and arrangement modes mentioned above are merely examples, and can be appropriately changed according to product specifications, the area of cultivated land to be applied, soil components, climatic conditions, and the like. .

10,100 …地下灌漑用部材
12 …遮水部
14 …透水部
16 …空間保持部
26 …通水空間
50,104 …地下灌漑システム
54,106 …保水土壌部
58,60 …給水部材(第1配水管,給水タンク)
108 …水位管理器
DESCRIPTION OF SYMBOLS 10,100 ... Subsurface irrigation member 12 ... Water-impervious part 14 ... Permeable part 16 ... Space holding part 26 ... Water flow space 50, 104 ... Underground irrigation system 54, 106 ... Water-retaining soil part 58, 60 ... Water supply member (1st Water pipe, water supply tank)
108… Water level controller

Claims (8)

地中に埋設されて使用される地下灌漑用部材であって、
遮水性を有し、上側開口の溝状に埋設される遮水部、
透水性を有し、両側縁部が前記遮水部と一体化されて、前記遮水部の内面側に長手方向に延びる通水空間を形成する透水部、および
前記透水部内に設けられ、前記通水空間の閉塞を防止する空間保持部を備え、
前記遮水部、前記透水部および前記空間保持部は、予め一体化されており、
前記透水部は、前記遮水部内の当該透水部よりも下側の空間に一定の厚みの土の層が形成されるように、前記遮水部の側面に一体化されている、地下灌漑用部材。
It is a member for underground irrigation that is used buried in the ground,
A water-impervious portion having water-impervious properties and embedded in a groove shape of the upper opening,
Having water permeability, both side edges are integrated with the water-impervious part, forming a water-permeable space extending in the longitudinal direction on the inner surface side of the water-impervious part, and provided in the water-permeable part, It has a space holding part that prevents blockage of the water flow space,
The water shielding part, the water permeable part and the space holding part are integrated in advance,
The water permeable portion is integrated with a side surface of the water shielding portion so as to form a soil layer having a certain thickness in a space below the water permeable portion in the water shielding portion. Element.
地中に埋設されて使用される地下灌漑用部材であって、
遮水性を有し、上側開口の溝状に埋設される遮水部、
透水性を有し、両側縁部が前記遮水部と一体化されて、前記遮水部の内面側に長手方向に延びる通水空間を形成する透水部、および
前記透水部内に設けられ、前記通水空間の閉塞を防止する空間保持部を備え、
前記遮水部、前記透水部および前記空間保持部は、予め一体化されており、
前記透水部は、前記遮水部内の当該透水部よりも下側の空間に一定の厚みの土の層が形成されるように、当該遮水部に形成された底上げ部の上面に一体化されている、地下灌漑用部材。
It is a member for underground irrigation that is used buried in the ground,
A water-impervious portion having water-impervious properties and embedded in a groove shape of the upper opening,
Having water permeability, both side edges are integrated with the water-impervious part, forming a water-permeable space extending in the longitudinal direction on the inner surface side of the water-impervious part, and provided in the water-permeable part, It has a space holding part that prevents blockage of the water flow space,
The water shielding part, the water permeable part and the space holding part are integrated in advance,
The water permeable portion is integrated with an upper surface of a bottom raising portion formed in the water shielding portion so that a soil layer having a certain thickness is formed in a space below the water permeable portion in the water shielding portion. The material for underground irrigation.
地中に埋設されて使用される地下灌漑用部材であって、
遮水性および可撓性を有するシート状に形成される遮水部、
透水性および可撓性を有し、両側縁部が前記遮水部と一体化されて、前記遮水部の一方面に長手方向に延びる通水空間を形成する透水部、および
可撓性を有し、前記透水部内に設けられて、前記通水空間の閉塞を防止する空間保持部を備え、
前記遮水部、前記透水部および前記空間保持部は、予め一体化されており、
前記地下灌漑用部材は、施工前はロール状に巻回されて保持され、耕作地への施工時において、ロール状態から引き出されて、前記一方面が内面側となるように、前記遮水部が上側開口の溝状に変形されて埋設される、地下灌漑用部材。
It is a member for underground irrigation that is used buried in the ground,
A water shielding part formed into a sheet shape having water shielding and flexibility;
A water permeable portion having water permeability and flexibility, and having both side edge portions integrated with the water shielding portion to form a water passage space extending in a longitudinal direction on one surface of the water shielding portion; And having a space holding portion provided in the water permeable portion to prevent the water passage space from being blocked,
The water shielding part, the water permeable part and the space holding part are integrated in advance,
The underground irrigation member is wound and held in a roll shape before construction, and is drawn out from the roll state during construction on the cultivated land so that the one surface becomes the inner surface side. A member for underground irrigation, which is embedded in the shape of a groove in the upper opening.
複数の前記透水部を備える、請求項1ないしのいずれかに記載の地下灌漑用部材。 The member for underground irrigation in any one of Claim 1 thru | or 3 provided with the said some water permeable part. 前記透水部は、布製である、請求項1ないしのいずれかに記載の地下灌漑用部材。 The member for underground irrigation according to any one of claims 1 to 4 , wherein the water permeable portion is made of cloth. 前記透水部は、防根性を有する、請求項1ないしのいずれかに記載の地下灌漑用部材。 The member for underground irrigation according to any one of claims 1 to 5 , wherein the water permeable portion has root-proofing properties. 請求項1ないしのいずれかに記載の地下灌漑用部材を用いて、土壌に対して地下から水を供給する地下灌漑システムであって、
地中に埋設される前記地下灌漑用部材、および
前記地下灌漑用部材の透水部と接続され、前記透水部の通水空間に対して水を供給する給水部材を備える、地下灌漑システム。
With subirrigation member according to any one of claims 1 to 6, a underground irrigation systems for supplying water from underground against soil,
An underground irrigation system comprising: the underground irrigation member embedded in the ground; and a water supply member that is connected to the water permeable portion of the underground irrigation member and supplies water to the water permeable space of the water permeable portion.
請求項1ないしのいずれかに記載の地下灌漑用部材を用いて、土壌に対して地下から水を供給する地下灌漑システムであって、
地中に水平に埋設される前記地下灌漑用部材、
前記地下灌漑用部材の透水部と接続され、前記透水部の通水空間に対して水を供給する給水部材、および
前記地下灌漑用部材の遮水部内の重力水の水位を所定水位に保つ水位管理器を備える、地下灌漑システム。
With subirrigation member according to any one of claims 1 to 6, a underground irrigation systems for supplying water from underground against soil,
The underground irrigation member buried horizontally in the ground,
A water supply member that is connected to the water permeable portion of the underground irrigation member and supplies water to the water passing space of the water permeable portion, and a water level that keeps the level of gravity water in the water shielding portion of the underground irrigation member at a predetermined water level Underground irrigation system with a manager.
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