JP3248437B2 - Waste disposal site and its construction method - Google Patents
Waste disposal site and its construction methodInfo
- Publication number
- JP3248437B2 JP3248437B2 JP28217796A JP28217796A JP3248437B2 JP 3248437 B2 JP3248437 B2 JP 3248437B2 JP 28217796 A JP28217796 A JP 28217796A JP 28217796 A JP28217796 A JP 28217796A JP 3248437 B2 JP3248437 B2 JP 3248437B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- water level
- waste
- wall
- connecting 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
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- Processing Of Solid Wastes (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、山間部などに構築
される内陸型の廃棄物処分場およびその構築工法に関
し、特に、その遮水性の改良技術に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inland waste disposal site constructed in a mountainous area or the like and a construction method thereof, and more particularly to a technique for improving the water shielding property.
【０００２】[0002]
【従来の技術】汚染土などの産業廃棄物や家庭廃棄物の
埋立て処分場として、内陸型の処分場が知られており、
この種の処分場には、山間の谷部を堰止めて遮水工を施
した凹部を形成し、この凹部内に廃棄物を投棄する方
式、あるいは、平地部を掘削して遮水工を施した凹部を
形成し、この凹部内に廃棄物を投棄する方式がある。2. Description of the Related Art Inland-type disposal sites are known as landfill sites for industrial waste and household waste such as contaminated soil.
In this type of disposal site, a valley in a mountain is dammed to form a water-impregnated recess, and waste is dumped in this recess, or a flat terrain is excavated, There is a method in which an applied concave portion is formed, and waste is dumped in the concave portion.
【０００３】このような方式の廃棄物処分場では、遮水
工としては、例えば、凹部の内面に合成ゴムや合成樹脂
製の遮水シートを敷設する方法や、鉄筋コンクリート製
の地中連続壁を不透水層まで構築する方法などが採用さ
れている。[0003] In such a waste disposal site, as a water shielding work, for example, a method of laying a synthetic rubber or synthetic resin water shielding sheet on the inner surface of the concave portion, or a method of forming a reinforced concrete underground continuous wall. A method of building up to an impermeable layer is adopted.
【０００４】ところが、このような従来の遮水工には、
以下に説明する技術的な課題があった。[0004] However, such conventional waterproofing works include:
There were technical issues described below.
【０００５】[0005]
【発明が解決しようとする課題】すなわち、従来の遮水
シートや地中連続壁の遮水性は、内部の汚染水の浸出を
完璧に止めることができず、極わずかづつではあるが、
汚染水が浸出し、周辺の地下水を汚染するという問題が
あった。That is, the conventional water barrier sheet and the water barrier of the underground continuous wall cannot completely stop the leaching of the contaminated water inside, and it is very little.
There is a problem that contaminated water seeps out and pollutes surrounding groundwater.
【０００６】このような汚染水の浸出は、外部の地下水
位が低下し、内部の水位よりも小さくなると、より一層
顕著になる。[0006] Such leaching of contaminated water becomes even more pronounced when the external groundwater level drops and becomes lower than the internal water level.
【０００７】本発明は、このような従来の問題点に鑑み
てなされたものであって、その目的とするところは、外
部の地下水位の変動にかかわらず、汚染水の浸出を防止
することができる廃棄物処分場およびその構築工法を提
供することにある。The present invention has been made in view of such a conventional problem, and an object of the present invention is to prevent leaching of contaminated water irrespective of external groundwater level fluctuation. It is to provide a waste disposal site that can be constructed and a construction method thereof.
【０００８】また、別の目的として、汚染水の浸出が容
易に検出することができる廃棄物処分場およびその構築
工法を提供することにある。Another object of the present invention is to provide a waste disposal site and a construction method for the same, which can easily detect leaching of contaminated water.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、下端が不透水層または遮水性の底版で閉
塞された遮水性の外連壁と、この外連壁の内側に間隔を
隔てて設けられた遮水性の内連壁と、前記内連壁の内側
を掘削した後に、その下端側を閉塞するように設けられ
た遮水性の底版とを備え、前記内連壁と底版とで隔成さ
れた凹所内に廃棄物を投棄する廃棄物処分場であって、
前記外および内連壁間の水位と前記廃棄物の水位とを検
出する水位センサを設置し、これらの水位センサの検出
値に基づいて前記外，内連壁間の水位が前記廃棄物の水
位よりも常時高くなるように給排水する制御装置を設け
た。また、本発明は、地上から所定の間隔を隔てて、水
平断面が閉塞された形状の遮水性外，内連壁を形成し、
前記内連壁の内部を掘削した後に、この内連壁の下端側
を閉塞するようにして遮水性の底版を形成し、前記内連
壁と底版とで隔成された凹所内に廃棄物を投棄する廃棄
物処分場であって、前記外連壁は、その下端が不透水層
に到達するように形成するか、または、内部を掘削した
後に底版を形成して、前記外連壁の下端側を遮水閉塞す
るようにし、前記外，内連壁間の水位が前記廃棄物の水
位よりも常時高くなるように給排水するようにした。こ
のように構成された廃棄物処分場およびその構築工法に
よれば、外，内連壁間の水位が廃棄物の水位よりも常時
高くなるように給排水するので、外部の地下水位が変動
したとしても、廃棄物からの汚染水が外連壁を介して、
外部に浸出することが防げる。また、外，内連壁間に給
排水している水を検査することにより、汚染水の浸出の
有無が簡単に判る。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a water-impermeable outer connecting wall whose lower end is closed by an impermeable layer or a water-proof bottom plate, and an inner wall of the outer connecting wall. A water-blocking inner wall provided at intervals, and after excavating the inside of the inner wall, a water-blocking bottom plate provided to close the lower end thereof, and the inner wall is A waste disposal site for dumping waste in a recess separated by a bottom plate,
A water level sensor for detecting a water level between the outer and inner walls and a water level of the waste is installed, and a water level between the outer and inner walls is set to a water level of the waste based on a detection value of these water level sensors. A control device for water supply and drainage is provided so that it is always higher than the water supply. In addition, the present invention, at a predetermined interval from the ground, to form a water-shielding outer and inner connecting walls having a closed horizontal cross section,
After excavating the inside of the inner wall, a water-blocking bottom slab is formed by closing the lower end side of the inner wall, and waste is placed in a recess separated by the inner wall and the bottom slab. A waste disposal site for dumping, wherein the outer wall is formed so that a lower end thereof reaches an impermeable layer, or a bottom plate is formed after excavating the inside, and a lower end of the outer wall is formed. The water supply and drainage were performed so that the water level between the outer and inner communication walls was always higher than the water level of the waste. According to the waste disposal site constructed in this way and its construction method, water is supplied and drained so that the water level between the outer and inner walls is always higher than the waste water level. Also, contaminated water from waste is passed through external walls,
Leaching to the outside can be prevented. Also, by inspecting the water supplied and drained between the outer and inner walls, it is easy to determine whether or not contaminated water has leached.
【００１０】[0010]
【発明の実施の形態】以下、本発明の好適な実施の形態
について、添付図面を参照にして詳細に説明する。図１
は、本発明にかかる廃棄物処分場の一実施例を示してい
る。同図に示す廃棄物処分場は、平地部に構築した内陸
型のものであって、外連壁１０と、内連壁１２とを有し
ている。Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG.
1 shows an embodiment of a waste disposal site according to the present invention. The waste disposal site shown in FIG. 1 is an inland type constructed on a flat ground, and has an outer connecting wall 10 and an inner connecting wall 12.
【００１１】外，内連壁１０，１２は、地中連続壁工法
により形成された鉄筋コンクリート製の遮水壁であり、
水平断面が閉塞された角形，円形，楕円形などに形成さ
れ、内連壁１２は、外連壁１０の内側に沿って、所定間
隔を隔てた同一形状に形成されている。The outer and inner connecting walls 10 and 12 are reinforced concrete impermeable walls formed by an underground continuous wall method.
The horizontal cross section is formed in a closed square, circular, oval or the like, and the inner connecting wall 12 is formed in the same shape along the inside of the outer connecting wall 10 at a predetermined interval.
【００１２】この実施例の場合には、外連壁１０は、地
盤１４中の不透水層１６に下端が到達する深度まで形成
されていて、遮水閉塞されている。一方、内連壁１２
は、不透水層１６の上方の透水層１８にその下端が位置
している。In the case of this embodiment, the outer connecting wall 10 is formed to a depth at which the lower end reaches the impermeable layer 16 in the ground 14, and is impermeable to water. On the other hand, the inner wall 12
Is located at the lower end of the water-permeable layer 18 above the water-impermeable layer 16.
【００１３】内連壁１２で囲撓された内部は、その下端
側まで根切り掘削され、掘削後に内連壁１２の下端側を
閉塞するようにして遮水性の底版２０が形成され、内連
壁１２と底版２０とで隔成された凹所２２内に廃棄物２
４が投棄される。The inside surrounded by the inner connecting wall 12 is excavated to the lower end thereof, and after excavation, a water-shielding bottom plate 20 is formed so as to close the lower end of the inner connecting wall 12. The waste 2 is placed in a recess 22 separated by the wall 12 and the bottom plate 20.
4 are discarded.
【００１４】外，内連壁１０，１２で囲まれた部分は、
所定深度まで掘削し、多孔質パイプ２６を設置して、透
水性の砕石やプラスチック屑を充填することにより埋め
戻されている。The portion surrounded by the outer and inner connecting walls 10 and 12 is
It is excavated to a predetermined depth, and a porous pipe 26 is installed, and is buried by filling with permeable crushed stone or plastic waste.
【００１５】なお、この場合、外，内連壁１０，１２で
囲まれた部分の全部を掘削することなく、パイプ２６の
設置用孔を掘削し、掘削した孔内にパイプ２６を設置し
て、その外周を埋め戻すようにしてもよい。In this case, the hole for installing the pipe 26 is excavated without excavating the entire portion surrounded by the outer and inner connecting walls 10 and 12, and the pipe 26 is installed in the excavated hole. The outer periphery may be backfilled.
【００１６】このような構造の廃棄物処分場では、外，
内連壁１０，１２間の水位が、廃棄物２４の水位よりも
常時高くなるように制御装置２８によりコントロールさ
れる。In a waste disposal site having such a structure,
The water level between the inner connecting walls 10 and 12 is controlled by the control device 28 so as to be always higher than the water level of the waste 24.
【００１７】制御装置２８には、外，内連壁１０，１２
間の水位を検出する第１水位センサ３０と、廃棄物２４
の水位を検出する第２水位センサ３２とが接続されてい
るとともに、パイプ２６に水を給排水する給水及び排水
ポンプ３４，３６が接続されている。The control device 28 includes outer and inner connecting walls 10 and 12.
A first water level sensor 30 for detecting a water level between
A second water level sensor 32 for detecting the water level is connected, and a water supply and drainage pump 34, 36 for supplying and discharging water to the pipe 26 is connected.
【００１８】制御装置２８で行われる具体的な制御は、
第１および第２水位センサ３０，３２の検出信号に基づ
いて、廃棄物２４の水位が外，内連壁１０，１２間より
も高い場合には、給水ポンプ３４を駆動して、パイプ２
６に水を供給して、外，内連壁１０，１２間の水位を上
昇させる。The specific control performed by the control device 28 is as follows.
Based on the detection signals of the first and second water level sensors 30 and 32, when the water level of the waste 24 is higher than that between the outer and inner communication walls 10 and 12, the water supply pump 34 is driven to
6 is supplied with water to raise the water level between the outer and inner connecting walls 10 and 12.
【００１９】また、外，内連壁１０，１２間の水位が、
廃棄物２４の水位よりも高いが、両者の水位に大きな差
がありすぎると、外，内連壁１０，１２間から内部に水
が侵入するので、このような場合には、排水ポンプ３６
を駆動して、外，内連壁１０，１２間から水を排出し
て、両者間の水位差を適正に保つことである。The water level between the outer and inner connecting walls 10 and 12 is
Although the water level is higher than the water level of the waste 24, if there is too much difference between the water levels, water will enter the interior from between the outer and inner connecting walls 10 and 12, and in such a case, the drain pump 36
Is driven to discharge water from between the outer and inner connecting walls 10 and 12 so as to maintain a proper water level difference between the two.
【００２０】外，内連壁１０，１２間の水位をこのよう
にコントロールすると、外部の地下水位の変動にかかわ
らず、外，内連壁１０，１２間側の水位が内部よりも高
くなり、圧力差の関係から、廃棄物２４側から汚染水が
外連壁１０の外側に浸出することを確実に防止すること
ができる。When the water level between the outer and inner connecting walls 10 and 12 is controlled in this way, the water level between the outer and inner connecting walls 10 and 12 becomes higher than the inside regardless of the fluctuation of the external groundwater level. Due to the pressure difference, it is possible to reliably prevent the contaminated water from leaking out of the outer connecting wall 10 from the waste 24 side.
【００２１】また、万一廃棄物２４側から汚染水が浸出
した場合にも、外，内連壁１０，１２間に給排水してい
る水を検査することにより、汚染水の浸出の有無が簡単
に判り、その後の対策を迅速に行える。In the event that contaminated water is leached from the waste 24 side, the presence or absence of leaching of the contaminated water can be easily determined by inspecting the water supplied and drained between the outer and inner connecting walls 10 and 12. The following measures can be taken quickly.
【００２２】次ぎに、上記構成の廃棄物処分場の構築工
法について、図２および図３に基づいて説明する。廃棄
物処分場の構築では、まず、図２に示すように、地盤１
４中に外および内連壁１０，１２が地中連続壁工法によ
り形成される。Next, a construction method of the waste disposal site having the above-described configuration will be described with reference to FIGS. In constructing a waste disposal site, first, as shown in Fig. 2,
In 4, outer and inner connecting walls 10 and 12 are formed by an underground continuous wall method.
【００２３】外および内連壁１０，１２は、いずれも遮
水性のものであって、矩形状の溝孔を掘削して、鉄筋篭
を建込み、コンクリートを打設して、これを硬化させる
ことで形成される。The outer and inner connecting walls 10 and 12 are both water-blocking, and are formed by excavating a rectangular slot, installing a reinforced cage, placing concrete, and hardening the concrete. It is formed by things.
【００２４】外および内連壁１０，１２は、水平断面が
閉止した形状に形成され、外連壁１０は、下端が地盤１
４中の不透水層１６に達する深度まで形成されるととも
に、内連壁１２は、下端が不透水層１６に到達すること
なく、その上方の透水層１８の深度まで形成される。The outer and inner connecting walls 10 and 12 are formed to have a closed horizontal cross section.
The inner wall 12 is formed to the depth of the water-permeable layer 18 above the lower wall without reaching the water-impermeable layer 16 at the lower end.
【００２５】外および内連壁１０，１２の形成が終了す
ると、図３に示すように、内連壁１２で囲撓された内部
の根切り掘削が、内連壁１２の下端側まで行われる。こ
の根切り掘削が終了すると、内連壁１２の下端側を閉塞
するようにして底版２０が形成される。When the formation of the outer and inner walls 10 and 12 is completed, as shown in FIG. 3, excavation of the inside surrounded by the inner wall 12 is performed to the lower end side of the inner wall 12. . When the root excavation is completed, the bottom slab 20 is formed so as to close the lower end side of the inner connecting wall 12.
【００２６】この底版２０は、遮水性のものであり、鉄
筋コンクリートで所定の厚みに形成される。内連壁１２
の内部の根切り掘削と同時ないしは底版２０の形成の終
了後に、外，内連壁１０，１２間の掘削が行われる。The bottom slab 20 is water-blocking and is made of reinforced concrete to a predetermined thickness. Inner wall 12
The excavation between the outer and inner connecting walls 10 and 12 is performed at the same time as the excavation of the inside of the inside or after the formation of the bottom plate 20 is completed.
【００２７】そして、外，内連壁１０，１２間の掘削が
所定深度まで行われると、外，内連壁１０，１２間に多
孔質パイプ２６を所定の間隔を隔てて複数設置する。パ
イプ２６の外側と孔壁間に透水性の砕石やプラスチック
屑を充填することにより埋め戻しが行われる。When the excavation between the outer and inner connecting walls 10 and 12 is performed to a predetermined depth, a plurality of porous pipes 26 are installed between the outer and inner connecting walls 10 and 12 at a predetermined interval. Backfilling is performed by filling a permeable crushed stone or plastic waste between the outside of the pipe 26 and the hole wall.
【００２８】廃棄物２４は、内連壁１２と底版２０で囲
撓された凹所２２内に順次投棄され、外，内連壁１０，
１２間に第１水位センサ３０を設置するとともに、凹所
２２内に第２水位センサ３２を設置し、外，内連壁１
０，１２間の水の水位が、廃棄物２４の水位よりも常時
高くなるようにパイプ２６を介して、給排水が行われ
る。The waste 24 is sequentially dumped into the recess 22 surrounded by the inner wall 12 and the bottom slab 20, and the outer and inner walls 10,
12, a first water level sensor 30 is installed in the recess 22, and a second water level sensor 32 is installed in the recess 22.
Water supply and drainage is performed via the pipe 26 so that the water level between 0 and 12 is always higher than the water level of the waste 24.
【００２９】さて、以上のように構成された廃棄物処分
場およびその構築工法によれば、外，内連壁１０，１２
間の水位が廃棄物２４の水位よりも常時高くなるように
給排水するので、外部の地下水位が変動したとしても、
廃棄物２４の汚染水が外連壁１０を通過して、外部に浸
出することを確実に防止することができる。According to the waste disposal site constructed as described above and the construction method thereof, the outer and inner connecting walls 10 and 12 are constructed.
Water is supplied and drained so that the water level is always higher than the water level of the waste 24, so even if the external groundwater level fluctuates,
It is possible to reliably prevent the contaminated water of the waste 24 from passing through the outer connecting wall 10 and leaching to the outside.
【００３０】また、外，内連壁１０，１２間に給排水し
ている水を検査することにより、汚染水の浸出の有無が
簡単に判る。Inspection of the water supplied and drained between the outer and inner connecting walls 10 and 12 makes it possible to easily determine whether or not contaminated water has leaked.
【００３１】図４および図５は、本発明にかかる廃棄物
処分場およびその構築工法の他の実施例を示しており、
上記実施例と同一若しくは相当する部分に同符号を付し
て、その説明を省略するとともに、以下にその特徴点に
ついてのみ説明する。FIGS. 4 and 5 show another embodiment of the waste disposal site and the construction method according to the present invention.
The same reference numerals are given to the same or corresponding parts as in the above embodiment, and the description thereof will be omitted, and only the characteristic points will be described below.
【００３２】同図に示した実施例は、地盤１４中の不透
水層の深度が非常に深く、外連壁１０の下端側を不透水
層まで形成することが困難な場合に採用される。The embodiment shown in FIG. 1 is employed when the depth of the water-impermeable layer in the ground 14 is very deep and it is difficult to form the lower end of the outer connecting wall 10 up to the water-impermeable layer.
【００３３】この実施例の廃棄物処分場では、長方形状
などに形成された外，内連壁１０，１２と、前述した実
施例の不透水層１８に相当する第１底版２０ａと、底版
２０に相当する第２底版２０ｂとを有している。In the waste disposal site of this embodiment, the outer and inner connecting walls 10, 12 formed in a rectangular shape or the like, the first bottom plate 20a corresponding to the water-impermeable layer 18 of the above-described embodiment, and the bottom plate 20 And a second bottom plate 20b.
【００３４】第１および第２底版２０ａ，２０ｂは、そ
れぞれ遮水性のものであり、第１底版２０ａは、外，内
連壁１０，１２の双方の下部側を遮水閉塞するように形
成されている。第２底版２０ｂは、第１底版２０ａの上
方にあって、内連壁１２の下部側を遮水閉塞するように
形成されている。The first and second bottom plates 20a and 20b are respectively water-blocking, and the first bottom plate 20a is formed so as to block and block both lower portions of the outer and inner connecting walls 10 and 12. ing. The second bottom plate 20b is formed above the first bottom plate 20a so as to block and block the lower side of the inner connecting wall 12.
【００３５】第１および第２底版２０ａ，２０ｂ間に
は、内連壁１２の長手方向に沿って２本の第１仕切り壁
３８が、等間隔で設けられていて、第１，第２底版２０
ａ，２０ｂ間の部分を３つのゾーンｉ〜ｉｉｉに区画し
ている。また、この第１仕切り壁３８の延長線上には、
外，内連壁１０，１２間に位置する第２仕切り壁４０が
設けられている。Between the first and second bottom plates 20a and 20b, two first partition walls 38 are provided at equal intervals along the longitudinal direction of the inner connecting wall 12, and the first and second bottom plates are provided. 20
The portion between a and 20b is partitioned into three zones i to iii. On the extension of the first partition wall 38,
A second partition wall 40 is provided between the outer and inner connecting walls 10 and 12.
【００３６】第２仕切り壁４０は、内連壁１２の短手方
向の両端にも設けられていて、外，内連壁１０，１２間
の領域は、仕切り壁４０により８つのゾーンｉｖ〜ｘｉ
に区画されている。The second partition wall 40 is also provided at both ends in the short direction of the inner connecting wall 12, and a region between the outer and inner connecting walls 10, 12 is divided into eight zones iv to xi by the partition wall 40.
Is divided into
【００３７】内連壁１２の短手方向には、複数の貫通孔
４２が設けられていて、この貫通孔４２により、ゾーン
ｉとゾーンｖｉおよびｘｉとが連通し、ゾーンｉｉとゾ
ーンｖｉｉおよびｘとが連通し、ゾーンｉｉｉとゾーン
ｖｉｉｉおよびｉｘとが連通している。A plurality of through-holes 42 are provided in the short direction of the inner connecting wall 12, and the through-holes 42 allow the zone i to communicate with the zones vi and xi, and the zone ii and the zones vii and x And the zones iii and viii and ix are in communication.
【００３８】この結果、内連壁１２の外周に形成された
凹状の部分がゾーンｉ，ｉｉ，ｉｉｉ，ｖｉ，ｖの５つ
の領域に区画されている。各ゾーンｉ，ｉｉ，ｉｉｉ，
ｖｉ，ｖは、仕切り壁４０を形成する前に掘削され、パ
イプ２６を設置して、パイプ２６の外側は、砕石などに
より埋め戻されている。As a result, the concave portion formed on the outer periphery of the inner connecting wall 12 is partitioned into five areas of zones i, ii, iii, vi, and v. Each zone i, ii, iii,
vi and v are excavated before forming the partition wall 40, the pipe 26 is installed, and the outside of the pipe 26 is backfilled with crushed stone or the like.
【００３９】この実施例の場合には、各ゾーンｉ，ｉ
ｉ，ｉｉｉ，ｖｉ，ｖにそれぞれ第１水位センサ３０が
設置されるとともに、各ゾーンｉ，ｉｉ，ｉｉｉ，ｖ
ｉ，ｖに給排水ポンプが設置され、廃棄物２４の水位を
検出する第２センサ３２を設置して、外，内連壁１０，
１２間に区画されたゾーンｉ，ｉｉ，ｉｉｉ，ｖｉ，ｖ
内の水位が、廃棄物２４の水位よりも常時高くなるよう
に、個別に制御される。In the case of this embodiment, each zone i, i
The first water level sensor 30 is installed in each of i, iii, vi, and v, and each zone i, ii, iii, v
A water supply / drain pump is installed at i and v, and a second sensor 32 for detecting the water level of the waste 24 is installed.
Zones i, ii, iii, vi, v partitioned between 12
Is controlled individually so that the water level in the inside is always higher than the water level of the waste 24.
【００４０】このように構成された廃棄物処分場におい
ても上記実施例と同等の作用効果が得られるとともに、
本実施例では、区画されたゾーンｉ，ｉｉ，ｉｉｉ，ｖ
ｉ，ｖの給排水を検査することにより、内連壁１２のど
の部分から汚染水が浸出しているかが判り、その後の補
修対策に役立てることができる。In the waste disposal site constructed as described above, the same operation and effect as those of the above embodiment can be obtained.
In this embodiment, the divided zones i, ii, iii, v
By inspecting the water supply and drainage of i and v, it is possible to know from which part of the inner communication wall 12 the contaminated water is leaching out, which can be used for subsequent repair measures.
【００４１】この実施例の廃棄物処分場を構築する際に
は、所定深度まで外，内連壁１０，１２を地中連続壁工
法で形成したのち後に、外，内連壁１０，１２間および
内連壁１２内を掘削し、第１底版２０ａおよび第１仕切
り壁３８，第２底版２０ｂの順に形成し、ゾーンｉ〜ｉ
ｉｉ内を掘削した後に、第２仕切り壁４０を形成して、
パイプ２６を設置して、その外側を砕石などにより埋め
戻せばよい。In constructing the waste disposal site of this embodiment, the outer and inner connecting walls 10 and 12 are formed to the predetermined depth by the underground continuous wall method, and then the outer and inner connecting walls 10 and 12 are connected to each other. And the inside wall 12 is excavated to form a first bottom plate 20a, a first partition wall 38, and a second bottom plate 20b in this order, and zones i to i are formed.
After excavating inside ii, the second partition wall 40 is formed,
The pipe 26 may be installed and the outside thereof may be backfilled with crushed stone or the like.
【００４２】そして、廃棄物２４を投棄した後に、外，
内連壁１０，１２間に区画されたゾーンｉ，ｉｉ，ｉｉ
ｉ，ｖｉ，ｖ内の水位が、廃棄物２４の水位よりも常時
高くなるように制御すると、不透水層が非常に深い場合
でも、外部に汚染水が浸出することがない処分場を構築
することができる。After dumping the waste 24,
Zones i, ii, ii partitioned between the inner walls 10, 12
If the water level in i, vi, and v is controlled to be always higher than the water level of the waste 24, a disposal site where contaminated water does not leach to the outside is constructed even when the water-impermeable layer is very deep. be able to.
【００４３】[0043]
【発明の効果】以上、実施例で詳細に説明したように、
本発明にかかる廃棄物処分場およびその構築工法によれ
ば、汚染水の外部浸出を確実に防止することができる。As described above in detail in the embodiments,
ADVANTAGE OF THE INVENTION According to the waste disposal site and its construction method concerning this invention, the outside leaching of contaminated water can be prevented reliably.
【図１】この発明にかかる廃棄物処分場の一実施例を示
す断面説明図である。FIG. 1 is an explanatory sectional view showing one embodiment of a waste disposal site according to the present invention.
【図２】図１に示した廃棄物処分場の構築工法における
最初の工程を示す断面図である。FIG. 2 is a cross-sectional view showing a first step in a construction method of the waste disposal site shown in FIG.
【図３】図２の工程に引き続いて行われる工程の断面図
である。FIG. 3 is a cross-sectional view of a step performed subsequent to the step of FIG. 2;
【図４】この発明にかかる廃棄物処分場の他の実施例を
示す上面図である。FIG. 4 is a top view showing another embodiment of the waste disposal site according to the present invention.
【図５】図４の断面図である。FIG. 5 is a sectional view of FIG. 4;
１０ 外連壁 １２ 内連壁 １４ 地盤 １６ 不透水層 ２０ 底版 ２０ａ 第１底版 ２０ｂ 第２底版 ２４ 廃棄物 ２６ パイプ ２８ 制御装置 ３０ 第１水位センサ ３２ 第２水位センサ ３６ 給水ポンプ ３８ 排水ポンプ Reference Signs List 10 outer connecting wall 12 inner connecting wall 14 ground 16 impervious layer 20 bottom plate 20a first bottom plate 20b second bottom plate 24 waste 26 pipe 28 control device 30 first water level sensor 32 second water level sensor 36 water supply pump 38 drainage pump
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小谷 克己 東京都千代田区神田司町２−３ 株式会 社大林組東京本社内 (56)参考文献 特開 平４−34120（ＪＰ，Ａ) 特開 平７−119170（ＪＰ，Ａ) 実開 平５−67640（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B09B 1/00 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Katsumi Kotani 2-3, Kandajicho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo head office (56) References JP-A-4-34120 (JP, A) JP-A-Hei 7-119170 (JP, A) Japanese Utility Model Hei 5-67640 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) B09B 1/00
Claims (2)
塞された遮水性の外連壁と、この外連壁の内側に間隔を
隔てて設けられた遮水性の内連壁と、前記内連壁の内側
を掘削した後に、その下端側を閉塞するように設けられ
た遮水性の底版とを備え、前記内連壁と底版とで隔成さ
れた凹所内に廃棄物を投棄する廃棄物処分場であって、 前記外および内連壁間の水位と前記廃棄物の水位とを検
出する水位センサを設置し、 これらの水位センサの検出値に基づいて前記外，内連壁
間の水位が前記廃棄物の水位よりも常時高くなるように
給排水する制御装置を設けたことを特徴とする廃棄物処
分場。1. A water-impervious outer connecting wall having a lower end closed by a water-impermeable layer or a water-shielding bottom slab, a water-permeable inner connecting wall provided at an interval inside the outer connecting wall, After excavating the inside of the inner wall, a water-blocking bottom plate provided so as to close the lower end thereof is disposed, and waste is dumped in a recess separated by the inner wall and the bottom plate. A waste disposal site, comprising a water level sensor for detecting a water level between the outer and inner communication walls and a water level of the waste; and a water level sensor for detecting the water level between the outer and inner communication walls based on a detection value of these water level sensors. A waste disposal site provided with a control device for supplying and discharging water so that the water level is always higher than the water level of the waste.
が閉塞された形状の遮水性外，内連壁を形成し、前記内
連壁の内部を掘削した後に、この内連壁の下端側を閉塞
するようにして遮水性の底版を形成し、前記内連壁と底
版とで隔成された凹所内に廃棄物を投棄する廃棄物処分
場であって、 前記外連壁は、その下端が不透水層に到達するように形
成するか、または、内部を掘削した後に底版を形成し
て、前記外連壁の下端側を遮水閉塞するようにし、前記
外，内連壁間の水位が前記廃棄物の水位よりも常時高く
なるように給排水することを特徴とする廃棄物処分場の
構築工法。2. A water-impermeable outer and inner connecting wall having a closed horizontal cross section formed at a predetermined distance from the ground, and after excavating the inside of the inner connecting wall, a lower end of the inner connecting wall is formed. A waste disposal site that forms a water-blocking bottom plate by closing the side and dumps waste into a recess separated by the inner connecting wall and the bottom plate, wherein the outer connecting wall is The lower end is formed so as to reach the water-impermeable layer, or a bottom plate is formed after excavating the inside, so that the lower end side of the outer connecting wall is blocked by water, and the outer and inner connecting walls are closed. A method for constructing a waste disposal site, wherein water is supplied and drained so that the water level is always higher than the water level of the waste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28217796A JP3248437B2 (en) | 1996-10-24 | 1996-10-24 | Waste disposal site and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28217796A JP3248437B2 (en) | 1996-10-24 | 1996-10-24 | Waste disposal site and its construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10118603A JPH10118603A (en) | 1998-05-12 |
| JP3248437B2 true JP3248437B2 (en) | 2002-01-21 |
Family
ID=17649097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28217796A Expired - Fee Related JP3248437B2 (en) | 1996-10-24 | 1996-10-24 | Waste disposal site and its construction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3248437B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3663945B2 (en) * | 1998-12-09 | 2005-06-22 | 株式会社大林組 | Construction method of waste disposal site |
| JP2003033759A (en) * | 2001-07-26 | 2003-02-04 | Kajima Corp | Contaminant spread prevention method using water retaining type underground wall |
| JP2004183364A (en) * | 2002-12-04 | 2004-07-02 | Port & Airport Research Institute | Underground continuous cut off wall structure in land |
-
1996
- 1996-10-24 JP JP28217796A patent/JP3248437B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10118603A (en) | 1998-05-12 |
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