JP2940867B1 - Water seal type impermeable wall and its function management method - Google Patents
Water seal type impermeable wall and its function management methodInfo
- Publication number
- JP2940867B1 JP2940867B1 JP16046198A JP16046198A JP2940867B1 JP 2940867 B1 JP2940867 B1 JP 2940867B1 JP 16046198 A JP16046198 A JP 16046198A JP 16046198 A JP16046198 A JP 16046198A JP 2940867 B1 JP2940867 B1 JP 2940867B1
- Authority
- JP
- Japan
- Prior art keywords
- water
- area side
- filled
- impermeable
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
Abstract
【要約】
【課題】確実に汚染物質の流出または汚染地下水の拡散
を防止するとともに、経年的に汚染領域の浄化を図る。
【解決手段】地上から不透水地層６に至る深度に亘って
形成された掘削溝Ｋに対して、汚染領域側の溝壁面に沿
って低透水膜２を設置するとともに、汚染防止領域側の
溝壁面に沿って不透水膜４を設置し、これら低透水膜２
と不透水膜４とによって挟まされた空間内に砂、砂利、
砕石等の透水性材料を充填し、少なくとも汚染領域側よ
りも高水位に管理される水張り透水層３を形成する。An object of the present invention is to surely prevent outflow of pollutants or diffusion of contaminated groundwater and purify a polluted area over time. A low water permeable membrane (2) is installed along a groove wall on a polluted area side in an excavation groove (K) formed over a depth from the ground to an impermeable stratum (6), and a groove on a pollution prevention area side. An impermeable membrane 4 is installed along the wall surface,
Sand, gravel, and the like in the space sandwiched by
A water-permeable material such as crushed stone is filled to form a water-filled water-permeable layer 3 that is managed at a higher water level than at least the contaminated area side.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、廃棄物処理場など
からの汚染物質の流出や汚染地下水の拡散を防止すると
ともに、汚染、汚水域の水質浄化を図るための水封式遮
水壁およびその機能管理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water seal type water impervious wall for preventing outflow of contaminants from a waste disposal site and the like and diffusion of contaminated groundwater, and for purifying water quality of contaminated and contaminated water areas. It relates to the function management method.
【０００２】[0002]
【従来の技術】近年、産業の発達に伴い環境問題が深刻
化しつつある。特に、産業廃棄物処理場から流出する汚
染物質、たとえば水銀、カドニウム、クロムなどの重金
属類や、有機塩素系溶剤や農薬などの有機汚染物質、ト
リクロロエチレン、ダイオキシンなどの高毒性有機塩素
化合物が生活領域または田畑に流出して土壌が汚染され
るなどの問題が表面化している。2. Description of the Related Art In recent years, environmental problems have become more serious with the development of industry. In particular, pollutants discharged from industrial waste treatment plants, such as heavy metals such as mercury, cadmium, and chromium, organic pollutants such as organic chlorinated solvents and pesticides, and highly toxic organic chlorine compounds such as trichlorethylene and dioxin are used in the living area. Or problems such as runoff into fields and soil contamination have surfaced.
【０００３】これらの汚染物質の流出や土壌汚染などを
防止するための対策としては、従来より地盤中に遮水壁
などを構築することが行われてきた。具体的には、深層
混合処理工法による遮水壁、ＲＣ連続壁工法による遮水
壁およびスラリーウォール遮水壁などがある。[0003] As a countermeasure to prevent the outflow of these contaminants and soil contamination, it has heretofore been practiced to construct a water impervious wall or the like in the ground. Specifically, there are a water impermeable wall formed by a deep mixing treatment method, a water impermeable wall formed by an RC continuous wall method, and a slurry wall impermeable wall.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、先ず第
１の深層混合処理による遮水壁は、攪拌羽根を有する混
合機を用いて固化材を加えながら土と原位置にて混合
し、両者の化学的硬化作用によって壁体を構築するもの
であるが、深度が深くなるにつれて地盤固化体同士のラ
ップが不完全となる可能性があり、地盤の深さ方向に亘
って完全な遮水壁を構築することが困難であるなどの問
題がある。However, first, the impermeable wall formed by the first deep mixing process is mixed in situ with the soil while adding a solidifying material by using a mixer having stirring blades, and the two are chemically mixed. Although the wall is constructed by the objective hardening action, the wrapping between the solidified bodies may become incomplete as the depth increases, and a complete impermeable wall is constructed in the depth direction of the ground There is a problem that it is difficult to do.
【０００５】第２のＲＣ連続壁による遮水壁は、バケッ
ト式または多軸回転式の掘削機により溝を掘削し、この
溝内に鉄筋籠を建て込むとと共に、コンクリートを流し
込んでＲＣ壁体を構築するものであり、上記深層混合処
理による遮水壁に比べれば均質な遮水壁を構築すること
が可能となる。しかしながら、ＲＣ壁体に地震などによ
ってクラックが生じた場合には、そこから汚染物質が流
出することになるとともに、クラックの補修が実質的に
困難であるなどの問題がある。また、残土、廃泥水の処
理費が嵩みコスト高になるとともに、重機類を多用する
ため作業足場スペースが必要となるなどの問題もある。[0005] The water impervious wall by the second RC continuous wall is formed by excavating a groove with a bucket type or multi-axis rotary type excavator, placing a reinforcing cage in the groove, and pouring concrete into the RC wall. It is possible to construct a more uniform impermeable wall compared to the impermeable wall formed by the deep mixing process. However, when a crack occurs in the RC wall due to an earthquake or the like, there is a problem that contaminants flow out therefrom and repair of the crack is substantially difficult. In addition, there are problems that the cost of treating the residual soil and waste mud increases and the cost increases, and that a heavy use of heavy equipment requires a work scaffold space.
【０００６】次いで、第３のスラリーウォール遮水壁
は、バケット式や多軸回転式掘削機により溝を掘削する
際に用いられるセメント−ベントナイト系自硬性安定液
と粘性土との混合体を壁体とするものであり、ローコス
トで遮水壁の構築が可能となるが、施工深度に限界があ
るなどの問題を有する。Next, the third slurry wall impervious wall is made of a mixture of a cement-bentonite-based self-hardening stabilizer and a viscous soil used when excavating a trench with a bucket type or multi-axial rotary excavator. Although it is possible to construct a water impervious wall at low cost, there is a problem that the construction depth is limited.
【０００７】これら３種類の遮水壁工法はそれぞれ得失
を有するが、根本的には各工法とも単に汚染物質の流出
をブロックするに止まるものであり、汚染物質の除去お
よび水質浄化を図ることはできない。Although these three types of impermeable wall construction methods have their respective advantages and disadvantages, each construction method basically only blocks outflow of pollutants, and it is difficult to remove contaminants and purify water. Can not.
【０００８】そこで、本発明の主たる課題は、確実に汚
染物質の流出または汚染地下水の拡散を防止するととも
に、経年的に汚染または汚水領域の浄化が図れるように
すること、および低コストで施工が可能であるととも
に、地震などの影響を受けることなく、長期的に流出防
止・拡散防止機能を維持し得るなどの利点を有する遮水
壁及びその機能管理方法を提供することにある。Accordingly, a main object of the present invention is to prevent the outflow of contaminants or the diffusion of contaminated groundwater, to make it possible to purify polluted or contaminated areas over time, and to carry out construction at low cost. It is an object of the present invention to provide a water impermeable wall and a method for managing the function of the water impermeable wall, which is possible and has an advantage of being able to maintain the outflow prevention / diffusion prevention function for a long time without being affected by an earthquake or the like.
【０００９】[0009]
【課題を解決するための手段】前記課題を解決するため
の本発明に係る第１の水封式遮水壁は、地上から不透水
地層に至る深度に亘って形成された掘削溝に対し、汚染
領域側の溝壁面に沿って低透水膜を設置するとともに、
汚染防止領域側の溝壁面に沿って不透水膜を設置し、こ
れら低透水膜と不透水膜とによって挟まされた空間内に
砂、砂利、砕石等の透水性材料を充填し、少なくとも汚
染領域側よりも高水位に保持される水張り透水層を形成
したことを特徴とするものである。A first water-sealed impermeable wall according to the present invention for solving the above-mentioned problems is provided in a digging groove formed over a depth from the ground to an impermeable stratum. Along with installing a low water permeable membrane along the groove wall on the contaminated area side,
A water-impermeable membrane is installed along the groove wall on the side of the pollution prevention area, and the space sandwiched between the low-water-permeable membrane and the water-impermeable membrane is filled with a water-permeable material such as sand, gravel, crushed stone, etc. A water-filled permeable layer that is maintained at a higher water level than the side is formed.
【００１０】次いで、第２の水封式遮水壁は、地上から
不透水地層に至る深度に亘って形成された掘削溝に対
し、汚染領域側の溝壁面に沿って低透水膜を設置すると
ともに、汚染防止領域側の溝壁面に沿って少なくとも前
記汚染領域側に設置された低透水膜よりも相対的に透水
率の低い膜を設置し、これらの膜に挟まれた空間内に
砂、砂利、砕石等の透水性材料を充填し、少なくとも汚
染領域側よりも高水位に保持される水張り透水層を形成
したことを特徴とするものである。[0010] Next, the second water-sealed type impermeable wall is provided with a low water-permeable film along a groove wall on the side of the contaminated area with respect to the excavation groove formed over the depth from the ground to the impermeable stratum. Along with the groove wall on the pollution prevention area side, install a membrane having a relatively low permeability than at least the low water permeability membrane installed on the pollution area side, sand in a space sandwiched by these membranes, It is characterized by forming a water-filled water-permeable layer filled with a water-permeable material such as gravel or crushed stone, which is maintained at a higher water level than at least the contaminated area side.
【００１１】また、前記水封式遮水壁によって汚染領域
から汚染防止領域への汚染物質の流出・拡散を防止する
とともに、汚染領域の水質浄化を図るための機能管理方
法は、前記水張り透水壁層に水位観測井戸を設けるとと
もに、前記汚染領域側に水位観測井戸並びに揚水施設を
設け、前記水張り透水層および汚染領域側の水位計測に
基づき、汚染領域側の地下水を随時汲み上げる一方、水
張り透水層に対して随時清水または汚染領域から汲み上
げた汚染水を浄化した浄化水を供給することによって、
常時、水張り透水層側の水位を汚染領域側の地下水位よ
りも高く保持するように管理することを特徴とする。Further, the function management method for preventing outflow and diffusion of contaminants from the contaminated area to the contaminated prevention area by the water seal type impermeable wall and purifying the water quality of the contaminated area is characterized in that the water-filled water-permeable wall comprises: A water level observation well is provided in the layer, a water level observation well and a pumping facility are provided on the contaminated area side, and the groundwater on the contaminated area side is pumped as needed based on the water level measurement on the contaminated area and the contaminated area side. By supplying fresh water or purified water purified from contaminated water pumped from contaminated areas as needed.
It is characterized in that the water level on the water-filled permeable layer side is always maintained higher than the groundwater level on the polluted area side.
【００１２】[0012]
【発明の実施の形態】以下、本発明の実施の形態につい
て図面を参照しながら詳述する。図１は本発明に係る水
封式遮水壁１の設置構造例を示したものであり、図２は
その要部拡大図である。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an example of an installation structure of a water-sealing type impermeable wall 1 according to the present invention, and FIG. 2 is an enlarged view of a main part thereof.
【００１３】図１においては、水封式遮水壁１が設置さ
れた位置よりも図面左方側が汚染領域であり、図面右方
が汚染防止領域である場合を想定しており、地上より所
定の深さまでは砂層等よりなる透水地層５が存在し、そ
の下側に粘性土等からなる不透水層６が存在するものと
する。In FIG. 1, it is assumed that the left side of the drawing is a pollution area and the right side of the drawing is a pollution prevention area from the position where the water-sealing type impermeable wall 1 is installed. It is assumed that a water permeable formation 5 made of a sand layer or the like exists at a depth of, and an impermeable layer 6 made of a viscous soil or the like exists below the water permeable formation 5.
【００１４】本水封式遮水壁１は、懸垂式クラムシェル
またはロッド式クラムシェル等のバケット式掘削機、ま
たは垂直多軸式または水平多軸式掘削機等の任意の掘削
機を用いて前記不透水層６に至る深度まで掘削された溝
Ｋ内に対して、汚染領域側の溝壁面に沿って低透水膜２
を設置する一方、汚染防止領域側の溝壁面に沿って不透
水膜４を設置し、これら低透水膜と不透水膜４とに挟ま
れた溝空間内に、砂、砂利、砕石等の透水性材料を充填
する。この透水性材料の充填部には清水等を供給し、少
なくとも前記汚染領域の地下水位よりも高水位に保持さ
れる水張り透水層３を形成する。The water seal type impermeable wall 1 is formed by using a bucket type excavator such as a suspended clamshell or a rod type clamshell, or an arbitrary excavator such as a vertical multi-axis type or a horizontal multi-axis type excavator. The inside of the groove K excavated to the depth of the water-impermeable layer 6, along the groove wall on the side of the contaminated region, the low water-permeable membrane 2.
On the other hand, the water-impermeable membrane 4 is installed along the groove wall surface on the side of the pollution prevention area, and water, such as sand, gravel, and crushed stone, is placed in the groove space between the low water-permeable membrane and the water-impermeable membrane 4. Filling with a conductive material. Fresh water or the like is supplied to the filling portion of the water-permeable material to form a water-filled water-permeable layer 3 that is maintained at least at a water level higher than the groundwater level of the contaminated area.
【００１５】前記低透水膜２としては、たとえばポリ塩
化ビニル樹脂、ポリエチレン樹脂、ポリプロピレン樹
脂、ポリウレタン樹脂、エチレンプロピレンゴム、クロ
ロプレンゴム等の合成樹脂または合成ゴムを発泡させて
微細な連続気泡を形成したシートや、ポリプロピレンま
たはポリエステル等による織布または不織布シートなど
を用いることができる。また、前記不透水膜４として
は、前記の合成樹脂または合成ゴムシートを原シートの
ままで用いることができる。The low water-permeable membrane 2 is formed by foaming synthetic resin or synthetic rubber such as polyvinyl chloride resin, polyethylene resin, polypropylene resin, polyurethane resin, ethylene propylene rubber, chloroprene rubber or the like to form fine open cells. A sheet, a woven or nonwoven sheet of polypropylene or polyester, or the like can be used. Further, as the water-impermeable membrane 4, the above-mentioned synthetic resin or synthetic rubber sheet can be used as it is as the original sheet.
【００１６】一方、前記水張り透水層３および汚染領域
側にはそれぞれ少なくとも１以上の水位観測井戸７，８
が設けられ、それぞれの側における水位が常時、観測さ
れるようになっている。On the other hand, at least one or more water level observation wells 7, 8 are provided on the water-filled permeable layer 3 and the contaminated area side, respectively.
Are provided, and the water level on each side is always observed.
【００１７】また、水張り透水層３には清水を供給する
ために長手方向に沿って適宜の間隔で注水孔が形成され
た清水供給管１０が挿入設置され、一方汚染領域側には
地下水を汲み上げるために長手方向に沿って適宜の間隔
で吸水孔が形成された吸水管１２を揚水井戸１１中に挿
入するとともに、前記吸水管１２に対し地上に置かれた
ポンプまたは吸水管１２の下端および／または中間に設
置された水中ポンプ（図示せず）、あるいは真空揚水設
備等の適宜の揚水手段を設けた揚水施設９を設置し、汚
染領域から均等に地下水を汲み上げできるようにしてい
る。なお、前記水張り透水層３に設けられた水位観測井
戸７中に清水供給管１０を挿入するようにしても良い
し、また汚染領域側において水位観測井戸８中に吸水管
１２を挿入し、水位観測井戸８と揚水井戸１１とを兼用
するようにしてもよい。In order to supply fresh water to the water-filled permeable layer 3, fresh water supply pipes 10 having water injection holes formed at appropriate intervals along the longitudinal direction are inserted and installed, while groundwater is pumped to the contaminated area side. For this purpose, a water absorption pipe 12 having water absorption holes formed at appropriate intervals along the longitudinal direction is inserted into the pumping well 11, and a lower end of the pump or the water absorption pipe 12 placed on the ground with respect to the water absorption pipe 12 and / or Alternatively, a submersible pump (not shown) installed in the middle or a pumping facility 9 provided with appropriate pumping means such as a vacuum pumping facility is installed so that groundwater can be pumped evenly from the contaminated area. The freshwater supply pipe 10 may be inserted into the water level observation well 7 provided in the water-filled water-permeable layer 3, or the water absorption pipe 12 may be inserted into the water level observation well 8 on the polluted area side. The observation well 8 and the pumping well 11 may also be used.
【００１８】上記水封式遮水壁１においては、水張り透
水層３および汚染側領域の水位計測に基づき、図示され
ない清水供給設備より清水が前記水張り透水層３に対し
て適時供給されるとともに、汚染領域側の地下水が適時
汲み上げられることによって、水張り透水層３の水位が
汚染領域側の水位よりも常に高く保持される。両者の水
位差Δｈは、概ね１〜１．５ｍ程度に管理される。In the water-sealed type impermeable wall 1, based on the water level measurement of the water-filled permeable layer 3 and the contaminated side area, fresh water is supplied to the water-filled permeable layer 3 from a not-shown fresh water supply facility at the appropriate time. By pumping the groundwater on the polluted area side in a timely manner, the water level of the water-filled permeable layer 3 is always kept higher than the water level on the polluted area side. The water level difference Δh between the two is controlled to approximately 1 to 1.5 m.
【００１９】以上のように、水張り透水層３と汚染領域
側との水位が相対水位差をもって管理されることによっ
て、水張り透水層３に供給された清水は低透水層２をゆ
っくりと透過し、汚染領域側に向けて常時少しずつ流れ
出すため、汚染領域側の汚染物質が水封式遮水壁１を越
えて汚染防止領域に流出・拡散することが無くなる。ま
た、汚染領域側の地下水が適時汲み上げられるととも
に、前記水張り透水層３側から常時清水が流入し続ける
ため、経年の後、汚染領域内の汚染物質が除去されると
ともに、汚染領域側の水質が自然に浄化されるようにな
る。As described above, by controlling the water level between the water-filled permeable layer 3 and the contaminated area side with a relative water level difference, the fresh water supplied to the water-filled permeable layer 3 slowly permeates through the low permeable layer 2, Since the water gradually flows out gradually toward the contaminated area, contaminants on the contaminated area do not flow out and diffuse into the pollution prevention area beyond the water seal type impermeable wall 1. In addition, the groundwater on the polluted area side is pumped up in a timely manner, and fresh water always flows from the water-filled permeable layer 3 side, so that after a long time, pollutants in the polluted area are removed and the water quality on the polluted area side is reduced. It becomes naturally purified.
【００２０】なお、汚染領域から汲み上げられた地下水
は、水銀、カドニウム、クロムなどの重金属類や、有機
塩素系溶剤や農薬などの有機汚染物質、トリクロロエチ
レン、ダイオキシンなどの高毒性有機塩素化合物の除去
処理がなされた後、放流処理または前記水張り透水層３
に供給される清水（浄化水）として利用される。The groundwater pumped from the contaminated area is treated to remove heavy metals such as mercury, cadmium and chromium, organic pollutants such as organic chlorinated solvents and pesticides, and highly toxic organic chlorine compounds such as trichloroethylene and dioxin. After that, the water is discharged or the water-filled permeable layer 3
It is used as fresh water (purified water) supplied to
【００２１】ところで、上記例では掘削溝壁の汚染防止
領域側の壁面に対して不透水膜４を設置したが、水張り
透水層３に清水が供給される限り、汚染防止領域側にあ
る程度の清水は流出してもかまわない。したがって、前
記不透水膜４に代えて、少なくとも前記汚染領域側に設
置された低透水膜２よりも相対的に透水率の低い膜を設
置するようにしてもよい。両膜の透水率の関係が上記関
係にあれば、水張り透水層３内に供給される清水は、そ
の一部が汚染防止領域へ流出するとしても、その多くは
汚染領域側に流出し、汚染領域側に向かう地下水流れが
生成されるため、汚染領域側の汚染物質がこの流れに逆
らって汚染防止領域に流出・拡散することはない。In the above example, the water-impermeable membrane 4 is installed on the wall of the excavation trench wall on the side of the pollution prevention area. However, as long as fresh water is supplied to the water-filled water-permeable layer 3, a certain amount of fresh water is located on the pollution prevention area side. Can be spilled. Therefore, instead of the water-impermeable membrane 4, a membrane having a relatively lower water permeability than the low-water-permeable membrane 2 provided at least on the contaminated region side may be provided. If the relationship between the water permeability of the two membranes is as described above, most of the fresh water supplied into the water-filled permeable layer 3 flows out to the pollution prevention area even if a part of the fresh water flows out to the pollution prevention area. Since the groundwater flow toward the area is generated, the contaminants on the side of the contaminated area do not flow out and diffuse into the pollution prevention area against this flow.
【００２２】[0022]
【発明の効果】以上詳説のとおり、本発明によれば、確
実に汚染物質の流出または汚染地下水の拡散を防止する
とともに、経年的に汚染または汚水領域の浄化が図れる
ようになる。また、両側壁に設置される膜以外は砂、砂
利等の透水性材料を充填するだけでよいため、低コスト
で施工が可能であるとともに、地震などの影響を受ける
ことなく、長期的に流出防止・拡散防止機能を維持し得
るなど、種々の利点がもたらされるものとなる。As described above, according to the present invention, the outflow of pollutants or the diffusion of polluted groundwater can be reliably prevented, and the polluted or polluted water area can be purified over time. In addition, since it is only necessary to fill the permeable material such as sand and gravel except for the membranes installed on both side walls, construction is possible at low cost, and the spill can be carried out for a long time without being affected by earthquakes. Various advantages are provided, for example, the prevention and diffusion prevention function can be maintained.
【図１】本発明に係る水封式遮水壁１の設置例を示した
概略構造図である。FIG. 1 is a schematic structural diagram showing an installation example of a water-sealed type impermeable wall 1 according to the present invention.
【図２】その要部拡大図である。FIG. 2 is an enlarged view of a main part thereof.
１…水封式遮水壁、２…低透水膜、３…水張り透水層、
４…不透水膜、５…透水地層、６…不透水地層、７・８
…水位観測井戸、９…揚水設備、１０…清水供給管、１
１…揚水井戸、１２…吸水管、Ｋ…掘削溝1 ... water seal type impermeable wall, 2 ... low permeable membrane, 3 ... water-filled permeable layer,
4 ... water-impermeable membrane, 5 ... water-permeable formation, 6 ... water-impermeable formation, 7.8
... water level observation well, 9 ... pumping equipment, 10 ... fresh water supply pipe, 1
1 ... pumping well, 12 ... water intake pipe, K ... excavation trench
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平10−128267（ＪＰ，Ａ) 特開 平７−88454（ＪＰ，Ａ) 特開 平10−165916（ＪＰ，Ａ) 特開 平10−118603（ＪＰ，Ａ) 特開 平９−47737（ＪＰ，Ａ) 特開 昭61−1722（ＪＰ，Ａ) 特開 平２−164936（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) B09B 1/00 E02D 31/02 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-10-128267 (JP, A) JP-A-7-88454 (JP, A) JP-A-10-165916 (JP, A) JP-A-10-108 118603 (JP, A) JP-A-9-47737 (JP, A) JP-A-61-1722 (JP, A) JP-A-2-164936 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) B09B 1/00 E02D 31/02
Claims (3)
成された掘削溝に対し、汚染領域側の溝壁面に沿って低
透水膜を設置するとともに、汚染防止領域側の溝壁面に
沿って不透水膜を設置し、これら低透水膜と不透水膜と
によって挟まされた空間内に砂、砂利、砕石等の透水性
材料を充填し、少なくとも汚染領域側よりも高水位に保
持される水張り透水層を形成したことを特徴とする水封
式遮水壁。An excavation trench formed over a depth extending from the ground to an impermeable stratum is provided with a low water permeable membrane along a groove wall on a contamination area side and along a groove wall on a pollution prevention area side. A water-permeable material such as sand, gravel, and crushed stone is filled in a space sandwiched between the low-water-permeable membrane and the water-impermeable membrane, and is kept at a higher water level than at least the contaminated area side. A water-sealed type impermeable wall characterized by forming a water-filled permeable layer.
成された掘削溝に対し、汚染領域側の溝壁面に沿って低
透水膜を設置するとともに、汚染防止領域側の溝壁面に
沿って少なくとも前記汚染領域側に設置された低透水膜
よりも相対的に透水率の低い膜を設置し、これらの膜に
挟まれた空間内に砂、砂利、砕石等の透水性材料を充填
し、少なくとも汚染領域側よりも高水位に保持される水
張り透水層を形成したことを特徴とする水封式遮水壁。2. A low water permeable membrane is installed along a groove wall on a contamination area side for an excavation groove formed over a depth from the ground to an impermeable formation, and along a groove wall on a pollution prevention area side. At least a membrane having a relatively low permeability than the low-permeable membrane installed at least on the contaminated area side is installed, and a space interposed between these membranes is filled with a water-permeable material such as sand, gravel, crushed stone and the like. A water-sealed impermeable wall, wherein a water-filled permeable layer that is maintained at a higher water level than at least the contamination area side is formed.
って汚染領域から汚染防止領域への汚染物質の流出・拡
散を防止するとともに、汚染領域の水質浄化を図るため
の機能管理方法であって、 前記水張り透水層に水位観測井戸を設けるとともに、前
記汚染領域側に水位観測井戸並びに揚水施設を設け、 前記水張り透水層および汚染領域側の水位計測に基づ
き、汚染領域側の地下水を随時汲み上げる一方、水張り
透水層に対して随時清水または汚染領域から汲み上げた
汚染水を浄化した浄化水を供給することによって、常
時、水張り透水層側の水位を汚染領域側の地下水位より
も高く保持するように管理することを特徴とする水封式
遮水壁の機能管理方法。3. A function management method for preventing outflow and diffusion of pollutants from a polluted area to a pollution-prevented area by the water-sealed impermeable wall according to claim 1 or 2, and for purifying water quality of the polluted area. A water level observation well is provided in the water-filled permeable layer, and a water level observation well and a pumping facility are provided on the contaminated area side.Based on the water level measurement of the water-filled permeable layer and the contaminated area side, groundwater on the contaminated area side is provided. While constantly pumping water, the freshwater or purified water purified from contaminated water is supplied to the water-filled permeable layer to keep the water level of the water-filled permeable layer higher than the groundwater level of the polluted area at all times. A method for managing the function of a water-sealed impermeable wall, characterized in that it is managed in such a way that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16046198A JP2940867B1 (en) | 1998-06-09 | 1998-06-09 | Water seal type impermeable wall and its function management method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16046198A JP2940867B1 (en) | 1998-06-09 | 1998-06-09 | Water seal type impermeable wall and its function management method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2940867B1 true JP2940867B1 (en) | 1999-08-25 |
| JPH11347511A JPH11347511A (en) | 1999-12-21 |
Family
ID=15715451
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16046198A Expired - Fee Related JP2940867B1 (en) | 1998-06-09 | 1998-06-09 | Water seal type impermeable wall and its function management method |
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| Country | Link |
|---|---|
| JP (1) | JP2940867B1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003033759A (en) * | 2001-07-26 | 2003-02-04 | Kajima Corp | Contaminant spread prevention method using water retaining type underground wall |
| JP4544399B2 (en) * | 2004-03-25 | 2010-09-15 | 株式会社日立プラントテクノロジー | Soil purification method and system |
| JP5628014B2 (en) * | 2010-12-03 | 2014-11-19 | みらい建設工業株式会社 | Impermeable wall structure |
| JP6884527B2 (en) * | 2016-08-10 | 2021-06-09 | 株式会社長谷工コーポレーション | Cast-in-place pile method |
| CN110042871B (en) * | 2019-04-24 | 2020-11-20 | 内蒙古大雁矿业集团有限责任公司 | Anti-seepage film laying device and method |
-
1998
- 1998-06-09 JP JP16046198A patent/JP2940867B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11347511A (en) | 1999-12-21 |
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