JP3863630B2 - Penetration structure - Google Patents

Penetration structure Download PDF

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Publication number
JP3863630B2
JP3863630B2 JP12381997A JP12381997A JP3863630B2 JP 3863630 B2 JP3863630 B2 JP 3863630B2 JP 12381997 A JP12381997 A JP 12381997A JP 12381997 A JP12381997 A JP 12381997A JP 3863630 B2 JP3863630 B2 JP 3863630B2
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Japan
Prior art keywords
water
crushed
permeation
rare earth
crushed stone
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JP12381997A
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Japanese (ja)
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JPH10311082A (en
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哲保 柴田
不二夫 仙波
照一 西崎
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Hanex Co Ltd
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Hanex Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、地表に降った雨水等を集めて流通させると共に貯留させ、この流通,貯留過程で水が地中に浸透する際に該水に溶け込んだ重金属イオンを吸着固定し得るようにした浸透構造に関するものである。
【0002】
【従来の技術】
地表、例えば道路や公園或いは宅地に降った雨水等を側溝に集め、ますを介して流通管からなる管路を流通させると共に貯留管に貯留させ、この水をます,各管から地中に浸透させようにしたシステムがある。このシステムでは、降水時に於ける河川の一時的な増水を軽減することが出来、且つ地下水を涵養することが出来る。
【0003】
上記浸透システムは、流通管,貯留管共に周囲に浸透孔を形成した浸透管を用い、この浸透管の周囲に所定の厚さで砕石エレメントを敷設すると共に該砕石エレメントをシートエレメントで包んで構成され、浸透管内に流通或いは貯留する水が浸透孔,砕石エレメント及びシートエレメントを通して地中に浸透し得るように構成されている。特に、砕石エレメントがシートエレメントに包まれるために、砕石エレメントの間に周囲の土砂が侵入することがなく、良好な浸透作用を維持することが出来る。
【0004】
一方、道路の表面には各種の排気ガスや大気に混入した重金属の微粉末が存在している。このため、雨天時には、前記重金属が雨水に溶け込み或いは懸濁し、この雨水が地中に浸透することになる。
【0005】
【発明が解決しようとする課題】
上記水の浸透システムでは、雨水に溶け込み或いは懸濁した重金属は地中に浸透し、長い期間を経て土壌を汚染する虞がある。このため、雨水が浸透する過程で重金属を分離しておくことが好ましい。
【0006】
本発明の目的は、雨水に溶け込んだ重金属を吸着固定しておくことが出来る浸透構造を提供することにある。
【0007】
【課題を解決するための手段】
上記課題を解決するために本発明に係る浸透構造は、流通する水又は貯留した水を地中に浸透させる機能を有する土中構造物の周囲を透水性を有し且つ水酸イオンを発生させる微量放射性希土類鉱石を破砕した破砕体又は微量放射性希土類鉱石を破砕した粉末をセラミックス原料に混合させて焼成した焼成体或いは該焼成体を破砕した破砕体を含んだ透水性シートで覆ったことを特徴とするものである。
【0008】
上記浸透構造では、流通する水や貯留した水を浸透させる機能を持った浸透管や浸透井等の土中構造物の周囲に、透水性を有し且つ水酸イオンを発生させる微量放射性希土類鉱石を破砕した破砕体又は微量放射性希土類鉱石を破砕した粉末をセラミックス原料に混合させて焼成した焼成体或いは該焼成体を破砕した破砕体を含んだ透水性シートで覆ったので、土中構造物から流出した水が透水性シートに含まれた微量放射性希土類鉱石と接触すると水酸イオンが発生し、この水酸イオンによって水に溶け込み或いは懸濁した重金属のイオンを吸着して固定することが出来る。また地表を流れた水に有機物が存在する場合であっても、前記水酸イオンが吸着固定することが出来る。
【0009】
また他の浸透構造は、流通する水又は貯留した水を地中に浸透させる機能を有する土中構造物の周囲に砕石層を敷設し、前記砕石層の周囲を透水性を有し且つ水酸イオンを発生させる微量放射性希土類鉱石を破砕した破砕体又は微量放射性希土類鉱石を破砕した粉末をセラミックス原料に混合させて焼成した焼成体或いは該焼成体を破砕した破砕体を含んだ透水性シートで覆ったことを特徴とするものである。
【0010】
上記浸透構造では、土中構造物内を流通した水は該構造物から流出して砕石層を通り、透水性シートを通って地中に浸透する。重金属が溶け込み或いは懸濁した水が透水性シートに含まれた微量放射性希土類鉱石と接触すると水酸イオンが発生し、この水酸イオンによって水に溶け込み或いは懸濁した重金属のイオンを吸着して固定することが出来る。また透水性シートの周囲にある地山の土砂は該シートによって砕石層側に侵入することが防止され、砕石層が目詰まりをおこすことがない。
【0011】
またセラミックス原料としては、磁器原料のみならず、陶器原料及び汚泥焼却灰をも含むことが好ましい。このような原料に微量放射性希土類鉱石の粉末を混合させることで、多様な焼成体を製造することが出来る。
【0012】
【発明の実施の形態】
以下、上記浸透構造の好ましい実施形態について図を用いて説明する。図1は浸透構造の概略構成を説明する模式図、図2は浸透管を縦型に配置して構成した浸透井と横型に配置した浸透管との接合部の構造を説明する図、図3は浸透管部分の構造を説明する断面図、図4は浸透管を透水性シートで覆った状態を示す断面図である。
【0013】
浸透構造は、地表に降った雨水等を地中に埋設した土中構造物となる浸透管1に流通させて該管1と同様に土中構造物となる浸透井2に集め、浸透管1内を流通する過程で或いは浸透井2から地中に流出し得るように構成されている。本実施例に於いて、浸透管1及び浸透井2の周囲には砕石からなる砕石層3が敷設され、該砕石層3の周囲を透水性を有し且つ水酸イオンを発生させる天然トリウムや天然ウランを含む微量放射性希土類鉱石を破砕した破砕体又は微量放射性希土類鉱石を破砕した粉末をセラミックス原料に混合させて焼成した焼成体或いは該焼成体を破砕した破砕体を含んだ透水性シート4で覆っている。
【0014】
上記の如く浸透管1及び浸透井2の周囲に砕石層3を敷設することによって、前記浸透管1,浸透井2から砕石層3に流出した水が該砕石層3を通って透水性シート4と接触して水酸イオンが発生し、この水酸イオンが水に溶け込み或いは懸濁した重金属のイオンを吸着して固定することが可能である。
【0015】
また砕石層3では砕石の間に空隙が形成されるため、地山を構成する土砂が前記空隙に侵入した場合地表面が沈下することがある。このため、砕石層3を透水性シート5で覆うことで、浸透管1及び浸透井2から流出して砕石層3を通過した水を濾過すると共に砕石層3に地山の土砂が侵入することを防止し、これにより地盤沈下を防止している。
【0016】
浸透管1は側溝5に所定の間隔を持って配置したます6及びマンホール状の浸透井2を相互に接続し得るように埋設されている。従って、地表に降った雨水等は、側溝5からます6を通って浸透管1内を流通し、浸透井2に貯留される。そして浸透管1を流通する過程で、及び浸透井2に貯留された状態で地中に流出し或いは浸出する。
【0017】
浸透管1はヒューム管よりなり、周壁の所定位置に複数の浸透孔1aが形成されている。また浸透孔1aには合成樹脂繊維からなるマットエレメント(図示せず)が挿入され、フィルター枠7によって保持されている。従って、浸透管1内を流通する水は浸透孔1aを通って外部に流出し、このとき、マットエレメントによって濾過される。
【0018】
浸透井2は、基本的な構成は下水道管路に於けるマンホールと同様に、コンクリート管からなる円筒管8,斜壁管9,蓋10等によって構成されている。特に、円筒管8は下水道管路のマンホールと比較して底版11がより深い位置に設置されており、充分な量の水を貯留させることが可能なように構成されている。
【0019】
浸透井2を構成する円筒管8は浸透管1と同一の機能を有するものであり、周壁の所定位置には複数の浸透孔8aが形成されると共に該浸透孔8aにはマットエレメントが挿入されフィルター枠7によって保持されている。
【0020】
透水性シート4は透水性を有し、水と接触してマイナスイオンを発生する微量放射性希土類鉱石を破砕した破砕体又は微量放射性希土類鉱石を破砕した粉末をセラミックス原料に混合させて焼成した焼成体或いは該焼成体を破砕した破砕体を含んでいる。
【0021】
このような透水性シート4としては、微量放射性希土類鉱石を適度なサイズに破砕した破砕体,微量放射性希土類鉱石を破砕した粉末をセラミックス原料に混合させこの混合材料を適度なサイズに成形して焼成した焼成体或いは該焼成体を破砕した破砕体を付着(接着)させた繊維を織って製造した織布状のシート、或いは発泡性合成樹脂の原料に微量放射性希土類鉱石の粉末を混合させ、この混合材料を発泡させてシート状に成形した多孔質の透水性を有するシート等によって構成されている。
【0022】
上記透水性シート4では、水を自由に通過させることが可能であり、且つ砕石層3を覆ったとき土砂の侵入を阻止することが可能である。また透水性シート4が水没すると、微量放射性希土類鉱石から放射される放射線の作用によって水が水素のプラスイオンと水酸イオンのマイナスイオンに分解し、更に、水酸イオンは水中に存在する重金属のイオンを吸着して固定することが可能である。
【0023】
次に、上記浸透構造を実現する工法について簡単に説明する。本浸透構造では、浸透管1,浸透井2の周囲に砕石層3を敷設し、この砕石層3を透水性シート4で覆って構成されている。
【0024】
即ち、浸透管1の埋設経路に沿って所定深さで掘削すると共に予め設定された浸透井2の位置を所定深さに掘削する。掘削底を転圧して透水性シート4を敷きつめる。次いで、透水性シート4上に砕石を35cm〜60cmの厚さに敷きつめて転圧して砕石層3を形成し、その後、浸透管1を接続しつつ敷設する。浸透井2に対応する位置では転圧した砕石層3の上に底版11,円筒管8,斜壁管9を順に積み上げ、所定の円筒管8に浸透管1を接続する。
【0025】
その後、浸透管1,浸透井2の両側及び上部に砕石を35cm〜60cmの厚さに敷設して転圧することで砕石層3を構成し、更に、透水性シート4を巻き込むようにして砕石層3の上部を覆い、埋め戻しを行うことにより、浸透構造が完成する。
【0026】
上記の如く構成された浸透構造では、地表に降った雨水であって重金属が溶け込み懸濁してイオン化した水は、側溝5,ます6を通って浸透管1内を流通し、浸透井2に貯留する。
【0027】
特に、浸透管1の内部を流通する水のレベルが浸透孔1aより高くなったとき、水は浸透孔1aを通って流出し砕石層3を通過して透水性シート4に接触する。また水が浸透井2に貯留したとき、水は貯留レベルに応じて底版12,円筒管8の浸透孔8aから流出し、砕石層3を通過して透水性シート4に接触する。
【0028】
透水性シート4に触れた水はイオン化が促進し、多量のマイナスイオンが生成される。そして生成されたマイナスイオンは、水中に存在する重金属イオンを吸着して固定し、更に、新たなマイナスイオンが生成される。この反応は浸透管1及び浸透井2から水が流出している間継続し、重金属イオンが除去された水が地中に浸透する。従って、土壌を重金属で汚染する虞がない。
【0029】
また砕石層3を透水性シート4によって覆うことによって、該透水性シート4がスクリーンの機能を発揮して周囲にある土砂の砕石層3に対する侵入が阻止され、常に良好な浸透性能を保持することが可能であり、且つ地盤の沈下を防止することが可能である。
【0030】
前述の実施例では、土中構造物となる浸透管1及び浸透井2の周囲に砕石層3を敷設し、この砕石層3の周囲を透水性シート4で覆うように構成したが、この構成にのみ限定するものではなく、図4に示すように、浸透管1(浸透井2)の周囲を直接透水性シート4で覆っても良い。この場合、浸透管1の外表面と透水性シート4の間に適度な空隙を形成することが好ましい。
【0031】
【発明の効果】
以上詳細に説明したように本発明に係る浸透構造では、流通する水又は貯留した水を地中に浸透させる機能を有する土中構造物である浸透管及び浸透井の周囲を透水性を有し且つマイナスイオンである水酸イオンを発生させる微量放射性希土類鉱石を破砕した破砕体又は微量放射性希土類鉱石を破砕した粉末をセラミックス原料に混合させて焼成した焼成体或いは該焼成体を破砕した破砕体を含んだ透水性シートで覆ったので、地表に降った雨水に重金属が溶け込んでいるような場合であっても、水酸イオンが溶け込んだ重金属を吸着して固定することが出来る。このため、水が浸透した土壌を汚染する虞がない。
【0032】
また浸透管及び浸透井の周囲に砕石層を敷設し、この砕石層を透水性を有し且つマイナスイオンである水酸イオンを発生させるを発生させる微量放射性希土類鉱石を破砕した破砕体又は微量放射性希土類鉱石を破砕した粉末をセラミックス原料に混合させて焼成した焼成体或いは該焼成体を破砕した破砕体を含んだ透水性シートで覆った場合であっても、水酸イオンが溶け込んだ重金属を吸着して固定することが出来る。このため、水が浸透した土壌を汚染する虞がない。
【0033】
またセラミックス原料として磁器原料,陶器原料,汚泥焼却灰を用いることで多様な焼成体を製造することが出来る。
【図面の簡単な説明】
【図1】浸透構造の概略構成を説明する模式図である。
【図2】浸透管を縦型に配置して構成した浸透井と横型に配置した浸透管との接合部の構造を説明する図である。
【図3】浸透管部分の構造を説明する断面図である。
【図4】浸透管を透水性シートで覆った状態を示す断面図である。
【符号の説明】
1 浸透管
1a,8a 浸透孔
2 浸透井
3 砕石層
4 透水性シート
5 側溝
6 ます
7 フィルター枠
8 円筒管
9 斜壁管
10 蓋
11 底版
[0001]
BACKGROUND OF THE INVENTION
The present invention collects and circulates rainwater and the like that has fallen on the surface of the earth and stores them, and when the water permeates into the ground during this circulation and storage process, the heavy metal ions dissolved in the water can be adsorbed and fixed. Concerning structure.
[0002]
[Prior art]
Rainwater that has fallen on the ground surface, such as roads, parks, or residential land, is collected in the ditches, and the pipes made of distribution pipes are circulated through the troughs and stored in the storage pipes. This water is permeated into the ground from each pipe. There is a system to let you. With this system, it is possible to reduce the temporary increase of rivers during precipitation and to recharge groundwater.
[0003]
The permeation system uses a permeation pipe in which a permeation hole is formed in both the circulation pipe and the storage pipe, and a crushed stone element is laid around the permeation pipe with a predetermined thickness and the crushed stone element is wrapped with a sheet element. In addition, the water flowing or stored in the permeation pipe is configured to be able to permeate into the ground through the permeation hole, the crushed stone element, and the sheet element. In particular, since the crushed stone element is wrapped in the sheet element, the surrounding earth and sand do not enter between the crushed stone elements, and a good infiltration action can be maintained.
[0004]
On the other hand, various exhaust gases and fine powders of heavy metals mixed in the atmosphere exist on the surface of the road. For this reason, when it rains, the heavy metal dissolves or suspends in the rainwater, and the rainwater penetrates into the ground.
[0005]
[Problems to be solved by the invention]
In the above water infiltration system, heavy metals dissolved or suspended in rainwater may infiltrate into the ground and contaminate the soil after a long period of time. For this reason, it is preferable to separate heavy metals in the process of rainwater infiltration.
[0006]
An object of the present invention is to provide a penetration structure capable of adsorbing and fixing heavy metals dissolved in rainwater.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the infiltration structure according to the present invention has water permeability around the underground structure having a function of infiltrating the circulating water or stored water into the ground and generates hydroxide ions. A crushed body obtained by crushing a minute amount of radioactive rare earth ore, or a powder obtained by crushing a minute amount of radioactive rare earth ore, mixed with a ceramic raw material, and fired or covered with a water-permeable sheet containing the crushed material obtained by crushing the fired body. It is what.
[0008]
In the above infiltration structure, a minute amount of radioactive rare earth ore that has water permeability and generates hydroxide ions around soil structures such as infiltration pipes and infiltration wells that have the function of infiltrating the circulating water and stored water. Since it was covered with a fired body obtained by mixing a crushed crushed body or a powder obtained by pulverizing a minute amount of radioactive rare earth ore into a ceramic raw material, or a fired body including the crushed body obtained by pulverizing the fired body, When the outflowed water comes into contact with a minute amount of radioactive rare earth ore contained in the water-permeable sheet, hydroxide ions are generated, and heavy metal ions dissolved or suspended in the water can be adsorbed and fixed by the hydroxide ions. Further, even when organic substances are present in the water flowing on the ground surface, the hydroxide ions can be adsorbed and fixed.
[0009]
In another infiltration structure, a crushed stone layer is laid around an underground structure having a function of infiltrating circulating water or stored water into the ground. Covered with a crushed body obtained by crushing a minute amount of radioactive rare earth ore that generates ions, or a fired body obtained by mixing a powder obtained by crushing a minute amount of radioactive rare earth ore with a ceramic raw material, or a permeable sheet containing a crushed body obtained by crushing the fired body. It is characterized by that.
[0010]
In the infiltration structure, water flowing through the structure in the soil flows out from the structure, passes through the crushed stone layer, and penetrates into the ground through the water-permeable sheet. When water in which heavy metal is dissolved or suspended comes into contact with a minute amount of radioactive rare earth ore contained in the water-permeable sheet, hydroxide ions are generated, and the ions of heavy metal dissolved or suspended in water are adsorbed and fixed by the hydroxide ions. I can do it. Moreover, the earth and sand of the natural ground around the water-permeable sheet is prevented from entering the crushed stone layer by the sheet, and the crushed stone layer is not clogged.
[0011]
The ceramic raw material preferably contains not only porcelain raw materials but also ceramic raw materials and sludge incinerated ash. Various fired bodies can be manufactured by mixing such raw materials with a powder of a trace amount of radioactive rare earth ore.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the permeation structure will be described with reference to the drawings. FIG. 1 is a schematic diagram for explaining a schematic configuration of an osmotic structure, FIG. 2 is a diagram for explaining a structure of a joint portion between an osmotic well formed by arranging osmotic tubes vertically and an osmotic tube arranged horizontally. FIG. 4 is a cross-sectional view illustrating the structure of the permeation tube portion, and FIG. 4 is a cross-sectional view illustrating a state where the permeation tube is covered with a water-permeable sheet.
[0013]
The infiltration structure is made to circulate rainwater and the like that have fallen on the ground surface through an infiltration pipe 1 that is an underground structure buried in the ground, and collects it in an infiltration well 2 that is an underground structure in the same manner as the pipe 1. It is constituted so that it can flow out into the ground from the seepage well 2 in the process of circulating inside. In this embodiment, a crushed stone layer 3 made of crushed stone is laid around the permeation tube 1 and the permeation well 2, and natural thorium that has water permeability and generates hydroxide ions around the crushed stone layer 3. In a permeable sheet 4 including a crushed body obtained by crushing a minute amount of radioactive rare earth ore containing natural uranium, a fired body obtained by mixing a powder obtained by crushing a minute amount of radioactive rare earth ore with a ceramic raw material, or a crushed body obtained by crushing the fired body Covering.
[0014]
By laying the crushed stone layer 3 around the permeation pipe 1 and the permeation well 2 as described above, water flowing out from the permeation pipe 1 and the permeation well 2 to the crushed stone layer 3 passes through the crushed stone layer 3 and the water permeable sheet 4. Hydroxide ions are generated upon contact with the metal ions, and it is possible to adsorb and fix heavy metal ions dissolved or suspended in water.
[0015]
Moreover, in the crushed stone layer 3, since a space | gap is formed between crushed stones, when the earth and sand which comprise a natural ground penetrate | invade into the said space | gap, the ground surface may sink. For this reason, by covering the crushed stone layer 3 with the water permeable sheet 5, the water flowing out of the permeation pipe 1 and the seepage well 2 and passing through the crushed stone layer 3 is filtered, and earth and sand of the natural ground invade the crushed stone layer 3. This prevents land subsidence.
[0016]
The permeation tube 1 is embedded so that the first and second manhole-shaped perforation wells 2 disposed at a predetermined interval in the side groove 5 can be connected to each other. Accordingly, rainwater or the like that has fallen on the ground surface passes through the side grooves 5 through 6 and flows through the permeation pipe 1 and is stored in the permeation well 2. Then, in the process of flowing through the permeation pipe 1 and in the state of being stored in the permeation well 2, it flows out or leaches into the ground.
[0017]
The permeation tube 1 is formed of a fume tube, and a plurality of permeation holes 1a are formed at predetermined positions on the peripheral wall. A mat element (not shown) made of synthetic resin fiber is inserted into the permeation hole 1 a and is held by the filter frame 7. Accordingly, the water flowing through the permeation pipe 1 flows out through the permeation hole 1a and is filtered by the mat element at this time.
[0018]
The basic structure of the seepage well 2 is composed of a cylindrical pipe 8 made of a concrete pipe, a slanted wall pipe 9, a lid 10 and the like, like a manhole in a sewer pipe. In particular, the cylindrical pipe 8 has a bottom plate 11 installed at a deeper position than a manhole in a sewer pipe, and is configured to be able to store a sufficient amount of water.
[0019]
The cylindrical tube 8 constituting the permeation well 2 has the same function as the permeation tube 1, and a plurality of permeation holes 8a are formed at predetermined positions on the peripheral wall, and a mat element is inserted into the permeation hole 8a. It is held by the filter frame 7.
[0020]
The water-permeable sheet 4 has water permeability and is a fired body obtained by pulverizing a minute amount of radioactive rare earth ore that generates negative ions upon contact with water, or by mixing a powder obtained by pulverizing a minute amount of radioactive rare earth ore with a ceramic raw material. Alternatively, a crushed body obtained by crushing the fired body is included.
[0021]
As such a water-permeable sheet 4, a crushed body obtained by crushing a minute amount of radioactive rare earth ore or a powder obtained by crushing a minute amount of radioactive rare earth ore is mixed with a ceramic raw material, and the mixed material is formed into a suitable size and fired. A small amount of radioactive rare earth ore powder is mixed into a woven fabric sheet produced by weaving (adhering) the baked body or a crushed body obtained by crushing the baked body, or a foamable synthetic resin raw material. It is composed of a porous water-permeable sheet or the like formed by foaming the mixed material into a sheet shape.
[0022]
In the water-permeable sheet 4, it is possible to allow water to freely pass through and to prevent intrusion of earth and sand when the crushed stone layer 3 is covered. When the water-permeable sheet 4 is submerged, water is decomposed into positive ions of hydrogen and negative ions of hydroxide ions by the action of radiation radiated from a minute amount of radioactive rare earth ore. Further, the hydroxide ions are heavy metals present in the water. It is possible to adsorb and fix ions.
[0023]
Next, a method for realizing the above penetration structure will be briefly described. In this permeation structure, a crushed stone layer 3 is laid around the permeation tube 1 and the permeation well 2, and the crushed stone layer 3 is covered with a water-permeable sheet 4.
[0024]
That is, excavation is performed at a predetermined depth along the embedding path of the permeation tube 1 and a preset position of the permeation well 2 is excavated to a predetermined depth. The permeable sheet 4 is spread by rolling the excavated bottom. Next, the crushed stone is spread on the water-permeable sheet 4 to a thickness of 35 cm to 60 cm and rolled to form the crushed stone layer 3, and then laid while connecting the permeation tube 1. At the position corresponding to the seepage well 2, a bottom plate 11, a cylindrical tube 8, and a slanted wall tube 9 are sequentially stacked on the crushed stone layer 3, and the seepage tube 1 is connected to a predetermined cylindrical tube 8.
[0025]
After that, crushed stone is laid on both sides and upper part of the permeation tube 1 and osmosis well 2 to form a crushed stone layer 3 by rolling and pulverizing the crushed stone layer 3 so that the water-permeable sheet 4 is further wound. The upper part of 3 is covered and backfilled to complete the infiltration structure.
[0026]
In the seepage structure configured as described above, rainwater that has fallen on the ground surface, which is ionized by the dissolution and suspension of heavy metals, flows through the permeation pipe 1 through the side grooves 5 and 6, and is stored in the seepage well 2. To do.
[0027]
In particular, when the level of water flowing through the inside of the permeation pipe 1 becomes higher than that of the permeation hole 1a, the water flows out through the permeation hole 1a, passes through the crushed stone layer 3, and contacts the water-permeable sheet 4. When water is stored in the seepage well 2, the water flows out from the bottom plate 12 and the through hole 8 a of the cylindrical tube 8 according to the storage level, passes through the crushed stone layer 3, and comes into contact with the water permeable sheet 4.
[0028]
The water touching the water permeable sheet 4 promotes ionization, and a large amount of negative ions is generated. And the produced | generated negative ion adsorbs and fixes the heavy metal ion which exists in water, and also a new negative ion is produced | generated. This reaction continues while water flows out of the permeation tube 1 and the permeation well 2, and the water from which heavy metal ions have been removed permeates into the ground. Therefore, there is no risk of soil contamination with heavy metals.
[0029]
Moreover, by covering the crushed stone layer 3 with the water permeable sheet 4, the water permeable sheet 4 exhibits the function of a screen, and the penetration of the surrounding earth and sand into the crushed stone layer 3 is prevented, and always maintains good permeation performance. And subsidence of the ground can be prevented.
[0030]
In the above-described embodiment, the crushed stone layer 3 is laid around the permeation pipe 1 and the permeation well 2 that are the structures in the soil, and the perimeter of the crushed stone layer 3 is covered with the water permeable sheet 4. The permeation pipe 1 (permeation well 2) may be directly covered with a water permeable sheet 4 as shown in FIG. In this case, it is preferable to form an appropriate gap between the outer surface of the permeation tube 1 and the water permeable sheet 4.
[0031]
【The invention's effect】
As described in detail above, the infiltration structure according to the present invention has permeability around the infiltration pipe and the infiltration well, which is an underground structure having a function of infiltrating the circulating water or the stored water into the ground. In addition, a crushed body obtained by crushing a minute amount of radioactive rare earth ore that generates hydroxide ions that are negative ions, a fired body obtained by mixing a powder obtained by crushing a minute amount of radioactive rare earth ore with a ceramic raw material, or a crushed body obtained by crushing the fired body Since it is covered with the water-permeable sheet, the heavy metal in which the hydroxide ions are dissolved can be adsorbed and fixed even if the heavy metal is dissolved in the rainwater that has fallen on the ground surface. For this reason, there is no possibility of contaminating the soil into which water has permeated.
[0032]
In addition, a crushed stone layer is laid around the permeation pipe and the well, and this crushed stone layer is crushed by pulverizing a small amount of radioactive rare earth ore that has water permeability and generates hydroxide ions that are negative ions. Adsorbs heavy metals in which hydroxide ions are dissolved even when covered with a baked product obtained by mixing powders obtained by pulverizing rare earth ore with ceramic raw materials or a permeable product containing crushed products obtained by crushing the baked product And can be fixed. For this reason, there is no possibility of contaminating the soil into which water has permeated.
[0033]
Various ceramics can be manufactured by using porcelain materials, ceramic materials, and sludge incineration ash as ceramic materials.
[Brief description of the drawings]
FIG. 1 is a schematic diagram illustrating a schematic configuration of a permeation structure.
FIG. 2 is a diagram for explaining the structure of a joint portion between an infiltration well formed by arranging an osmotic tube vertically and an osmotic tube arranged horizontally.
FIG. 3 is a cross-sectional view illustrating the structure of a permeation tube portion.
FIG. 4 is a cross-sectional view showing a state in which a permeation tube is covered with a water permeable sheet.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Permeation pipe 1a, 8a Permeation hole 2 Permeation well 3 Crushed stone layer 4 Water-permeable sheet 5 Side groove 6 Mass 7 Filter frame 8 Cylindrical pipe 9 Slanted wall pipe
10 lid
11 Bottom plate

Claims (3)

流通する水又は貯留した水を地中に浸透させる機能を有する土中構造物の周囲を透水性を有し且つ水酸イオンを発生させる微量放射性希土類鉱石を破砕した破砕体又は微量放射性希土類鉱石を破砕した粉末をセラミックス原料に混合させて焼成した焼成体或いは該焼成体を破砕した破砕体を含んだ透水性シートで覆ったことを特徴とする浸透構造。  A crushed body or a minute amount of radioactive rare earth ore obtained by crushing a minute amount of radioactive rare earth ore that has water permeability and generates hydroxide ions around a structure in the soil that has the function of infiltrating the circulating or stored water into the ground. An osmotic structure characterized in that a pulverized powder is mixed with a ceramic raw material and fired or covered with a water-permeable sheet containing a crushed material obtained by pulverizing the fired body. 流通する水又は貯留した水を地中に浸透させる機能を有する土中構造物の周囲に砕石層を敷設し、前記砕石層の周囲を透水性を有し且つ水酸イオンを発生させる微量放射性希土類鉱石を破砕した破砕体又は微量放射性希土類鉱石を破砕した粉末をセラミックス原料に混合させて焼成した焼成体或いは該焼成体を破砕した破砕体を含んだ透水性シートで覆ったことを特徴とする浸透構造。  A trace amount of radioactive rare earth, in which a crushed stone layer is laid around an underground structure having a function of infiltrating circulating or stored water into the ground, and the crushed stone layer has water permeability and generates hydroxide ions. Penetration characterized by covering a crushed body obtained by pulverizing an ore or a powder obtained by pulverizing a minute amount of radioactive rare earth ore with a ceramic raw material or a baked body including the crushed body obtained by pulverizing the fired body Construction. 前記セラミックス原料が磁器原料及び陶器原料並びに汚泥焼却灰を含むことを特徴とする請求項1又は2に記載した浸透構造。  The infiltration structure according to claim 1 or 2, wherein the ceramic raw material includes porcelain raw material, ceramic raw material, and sludge incineration ash.
JP12381997A 1997-05-14 1997-05-14 Penetration structure Expired - Fee Related JP3863630B2 (en)

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