JP2007190482A - Apparatus and method for cleaning contaminated soil - Google Patents

Apparatus and method for cleaning contaminated soil Download PDF

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JP2007190482A
JP2007190482A JP2006010439A JP2006010439A JP2007190482A JP 2007190482 A JP2007190482 A JP 2007190482A JP 2006010439 A JP2006010439 A JP 2006010439A JP 2006010439 A JP2006010439 A JP 2006010439A JP 2007190482 A JP2007190482 A JP 2007190482A
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purification
outer cylinder
ground
soil
injection pipe
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JP4610013B2 (en
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Hisateru Okada
岡田久輝
Hiroshi Ito
伊藤浩
Takashi Yanagisawa
柳沢隆
Susumu Ito
伊藤晋
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Tokyu Construction Co Ltd
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Tokyu Construction Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus and a method for cleaning soil contaminated by a volatile organic compound in a series of processes. <P>SOLUTION: This apparatus consists of an outer cylinder having a hollow inside and agitator blades outside, and a solidifying agent injecting pipe inside the outer cylinder. A solidifying agent discharge opening is opened in the outer cylinder. The solidifying injecting pipe is housed inside the outer cylinder in a freely slidable manner. The solidifying agent discharge opening is opened in the solidifying injecting pipe. A ground is improved by simultaneously cleaning and solidifying the soil by using this cleaning apparatus. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、汚染土壌の浄化装置と浄化方法に関するものである。   The present invention relates to a purification apparatus and a purification method for contaminated soil.

揮発性有機化合物（ＶＯＣ）によって汚染された地盤を浄化するために、鉄粉と土とを攪拌、混合する方法が知られている。
その場合に一般に、鉄粉と水とを混合したスラリー状の混合液を地中に吐出し攪拌混合する方法によって行っている。
別の方法として、鉄粉とセメントとを同時に混合して地中に吐出し攪拌混合する方法も開発されている。

特開２００４−１５４７４４号公報。 In order to purify the ground contaminated with volatile organic compounds (VOC), a method of stirring and mixing iron powder and soil is known.
In that case, generally, it is carried out by a method of discharging and stirring and mixing a slurry-like mixed liquid in which iron powder and water are mixed.
As another method, a method in which iron powder and cement are mixed at the same time, discharged into the ground, and stirred and mixed has been developed.

JP 2004-154744 A.

鉄粉と水とを混合した液体を地中に吐出し攪拌混合するために、地盤内に多量の水が注入されて地盤の強度低下を引き起こす。
そのために、浄化する工程が終了後に、その工程とは別に、緩んだ地盤を改良する工程が必要であった。
また鉄粉と水とを混合してスラリー状にした混合液を地盤に直接注入する際に混合液は、鉄粉と水との比重が異なるために、そのままでは鉄粉が十分に地盤内に拡散せず、そのために特殊な分散剤を混入する必要があった。
鉄粉とセメントとを混合して地中に吐出し攪拌混合する方法では、セメントを地中に混入することで地盤がアルカリ性となり、そのために本来の目的である鉄粉の還元反応を阻害し、ＶＯＣ土壌の浄化を妨げる可能性がある。
In order to discharge and mix a mixture of iron powder and water into the ground, a large amount of water is injected into the ground, causing a decrease in strength of the ground.
Therefore, after the purification process is completed, a process for improving the loose ground is required separately from the process.
In addition, when directly injecting a mixture of iron powder and water into a slurry, the mixture has a different specific gravity between the iron powder and water. It did not diffuse and therefore it was necessary to incorporate a special dispersant.
In the method of mixing iron powder and cement, discharging to the ground and stirring and mixing, the ground becomes alkaline by mixing the cement into the ground, and therefore, the reduction reaction of the iron powder that is the original purpose is inhibited, May impede the cleanup of VOC soil.

上記のような課題を解決するために本発明の汚染土壌の浄化装置は、揮発性有機化合物によって汚染された土壌の土砂を攪拌する浄化装置であって、内部が中空で外部に攪拌翼を取付けた外筒と、外筒に開口した浄化材吐出口と、外筒内部にスライド自在に収納した固化材注入管と、固化材注入管に開口した固化材吐出口とより構成したオーガーを、重機のリーダーに取付けて構成した、汚染土壌の浄化装置を特徴とするものである。     In order to solve the above-mentioned problems, the contaminated soil purification apparatus of the present invention is a purification apparatus for agitating soil soil contaminated with volatile organic compounds, and has a hollow inside and a stirring blade attached outside. An auger made up of an outer cylinder, a purification material discharge port opened in the outer cylinder, a solidification material injection pipe slidably housed inside the outer cylinder, and a solidification material discharge port opened in the solidification material injection pipe It is characterized by a contaminated soil purification device that is attached to the reader.

また本発明の汚染土壌の浄化方法は、揮発性有機化合物によって汚染された土壌を浄化する方法であって、上記記載の汚染土壌の浄化装置を使用し、固化材注入管を外筒内部に収納した状態で、外筒を回転して地盤を攪拌してオーガーを地中に貫入し、次に外筒の浄化材吐出口から浄化材を吐出しながら、固化材注入管を地盤中に残した状態で、外筒のみを回転させて引き上げて、地中に浄化材混合土の柱を形成し、次に固化材注入管の固化材吐出口から固化材を吐出しながら浄化材混合土の柱の内部を引き上げて、地中に浄化材、固化材混合土の柱を形成して行う、汚染土壌の浄化方法を特徴とするものである。   The contaminated soil purification method of the present invention is a method for purifying soil contaminated with volatile organic compounds, and uses the contaminated soil purification apparatus described above, and stores the solidification material injection pipe inside the outer cylinder. In this state, the outer cylinder is rotated to stir the ground, and the auger penetrates into the ground. Next, while the purification material is discharged from the purification material discharge port of the outer cylinder, the solidification material injection pipe is left in the ground. In this state, only the outer cylinder is rotated and pulled up to form a column of the purification material mixed soil in the ground, and then the column of the purification material mixed soil while discharging the solidification material from the solidification material discharge port of the solidification material injection pipe. It is characterized by a method for purifying contaminated soil, which is performed by pulling up the inside of the soil and forming pillars of purification material and solidification material mixed soil in the ground.

また本発明の汚染土壌の浄化方法は、揮発性有機化合物によって汚染された土壌を浄化する方法であって、上記記載の汚染土壌の浄化装置を使用し、固化材注入管を外筒内部に収納した状態で、外筒を回転して地盤を攪拌してオーガーを地中に貫入し、次に外筒の浄化材吐出口から浄化材を吐出しながら、固化材注入管を地盤中に残した状態で、外筒のみを回転させて引き上げて、地中に浄化材混合土の柱を形成し、上記の工程を繰り返して複数本の浄化材混合土の柱を形成し、その後に、地盤中に残した固化材注入管の固化材吐出口から固化材を吐出しながら浄化材混合土の柱の内部を引き上げて、地中に浄化材、固化材混合土の柱を形成して行う、汚染土壌の浄化方法を特徴とするものである。
The contaminated soil purification method of the present invention is a method for purifying soil contaminated with volatile organic compounds, and uses the contaminated soil purification apparatus described above, and stores the solidification material injection pipe inside the outer cylinder. In this state, the outer cylinder is rotated to stir the ground, and the auger penetrates into the ground. Next, while the purification material is discharged from the purification material discharge port of the outer cylinder, the solidification material injection pipe is left in the ground. In the state, rotate only the outer cylinder and pull it up to form a column of purified material mixed soil in the ground, repeat the above process to form multiple purified material mixed soil columns, and then in the ground Contamination is performed by raising the inside of the column of the purification material mixed soil while discharging the solidification material from the solidification material discharge port of the remaining solidification material injection pipe, and forming the column of the purification material and the solidification material mixed soil in the ground It is characterized by a soil purification method.

本発明の汚染土壌の浄化装置と浄化方法は以上説明したようになるから次のような効果を得ることができる。
＜１＞ ＶＯＣで汚染された土壌を浄化するに際し、１台の装置で連続して行うことができる。そのために土壌の浄化とその後に地盤改良を行う従来の施工方法に比較して施工能率が向上し、工期を短縮でき、経済的である。
＜２＞ 浄化材を吐出し攪拌混合による土壌の浄化と、固化材の注入による地盤の固化とを連続した作業で行うことができるが、その場合に土の粒子の周囲を浄化材が取り囲んで浄化が進み、それらの隙間に固化材が侵入してゆくので固化が進むことになる。こうして浄化効果と固化効果を達成することができる。
Since the contaminated soil purification apparatus and purification method of the present invention are as described above, the following effects can be obtained.
<1> When purifying soil contaminated with VOC, it can be carried out continuously with one apparatus. Therefore, the construction efficiency is improved and the construction period can be shortened compared with the conventional construction method in which the soil is purified and then the ground is improved.
<2> Soil purification by discharging the purification material and stirring and mixing, and solidification of the ground by injection of the solidification material can be performed in a continuous operation. In that case, the purification material surrounds the soil particles. As the purification progresses and the solidifying material enters the gaps, the solidification proceeds. Thus, a purification effect and a solidification effect can be achieved.

以下図面を参照にしながら本発明の装置と方法の好適な実施の形態を詳細に説明する。   Preferred embodiments of the apparatus and method of the present invention will be described below in detail with reference to the drawings.

＜１＞ 対象地盤。
本発明の浄化装置と浄化方法が対象とする地盤は、揮発性有機化合物（ＶＯＣ）によって汚染された土壌である。 <1> Target ground.
The ground targeted by the purification apparatus and the purification method of the present invention is soil contaminated with volatile organic compounds (VOC).

＜２＞ オーガー。
本発明のオーガーＡは、攪拌翼１１を供えた外筒１と、その内部に摺動自在に収納した固化材注入管２によって構成する。
このように外筒１とその内部に収納した固化材注入管２より構成したオーガーＡを、図２に示すように重機本体Ｂの前面に立てたリーダーＣの上部に接続あるいは吊り下げ、リーダーＣに沿って昇降させる。
オーガーＡが回転する時の反力はリーダーＣに伝える。 <2> Auger.
The auger A of the present invention is constituted by an outer cylinder 1 provided with a stirring blade 11 and a solidifying material injection pipe 2 slidably accommodated therein.
As shown in FIG. 2, the auger A composed of the outer cylinder 1 and the solidification material injection pipe 2 housed in the outer cylinder 1 is connected to or suspended from the upper part of the leader C standing on the front surface of the heavy machine main body B as shown in FIG. Raise and lower along.
The reaction force when the auger A rotates is transmitted to the leader C.

＜３＞外筒１。
外筒１は、土壌浄化と固化を目的とした地盤改良のために地中へ挿入するのに足りる十分な長さを有し、その内部が中空の筒体である。
この外筒１の外部に攪拌翼１１を取付ける。
攪拌翼１１は、らせん状のもの、直線状のもの、など公知の構造の攪拌翼１１を利用することができる。
外筒１の先端付近、あるいは中間の位置には浄化材を吐出する浄化材吐出口１２を開口する。
浄化材としては、鉄粉などの金属還元材、または金属還元材を酸化したものを使用することができる。
この浄化材は粉体状、スラリー状、液体状などの状態で利用する。
そして外筒１の内部には、その中空部を通して浄化材を圧縮空気、あるいは圧縮水とともに圧送する通路を形成する。
圧縮水などとともに外筒１の内部の通路を圧送された浄化材は、先端付近に開口した浄化材吐出口１２から外部に吐出し攪拌混合される。 <3> Outer cylinder 1.
The outer cylinder 1 has a sufficient length to be inserted into the ground for soil improvement for the purpose of soil purification and solidification, and the inside thereof is a hollow cylinder.
A stirring blade 11 is attached to the outside of the outer cylinder 1.
As the stirring blade 11, a stirring blade 11 having a known structure such as a spiral shape or a linear shape can be used.
A purification material discharge port 12 for discharging the purification material is opened near the tip of the outer cylinder 1 or in the middle.
As the purification material, a metal reducing material such as iron powder or an oxidized metal reducing material can be used.
This purification material is used in the form of powder, slurry or liquid.
In the outer cylinder 1, a passage is formed through which the purification material is pumped together with compressed air or compressed water through the hollow portion.
The purifying material pumped through the passage inside the outer cylinder 1 together with the compressed water and the like is discharged to the outside from the purifying material discharge port 12 opened near the tip and mixed with stirring.

＜４＞固化材注入管２。
外筒の内部にはスライド自在に固化材注入管２を収納する。
固化材としては各種のセメント、すなわち、普通ポルトランドセメント、高炉セメント、セメント系固化材、低アルカリ性セメントなどを採用できる。
セメントのほかに、超微粒子セメント、シリカ微粒子、生石灰、石膏、水ガラスなどを使用できる。
本発明で使用する固化材は、上記のような材料を水やなんらかの溶剤で流動化させたスラリー状の流体である。
この固化材注入管２も中空の管体であり、内部には固化材を圧送する通路を形成してある。
固化材注入管２の先端付近には固化材吐出口２１を開口する。
固化材注入管２の内部の通路を圧送された固化材は、先端付近に開口した固化材吐出口２１から外部に吐出し地盤内に注入する。 <4> Solidification material injection tube 2.
The solidifying material injection tube 2 is accommodated in the outer cylinder so as to be slidable.
Various types of cement can be used as the solidifying material, that is, ordinary portland cement, blast furnace cement, cement-based solidifying material, low alkaline cement, and the like.
In addition to cement, ultra-fine cement, silica fine particles, quicklime, gypsum, water glass, etc. can be used.
The solidifying material used in the present invention is a slurry fluid obtained by fluidizing the above materials with water or some solvent.
This solidifying material injection tube 2 is also a hollow tube, and a passage for pumping the solidifying material is formed inside.
A solid material discharge port 21 is opened near the tip of the solid material injection pipe 2.
The solidified material pumped through the passage inside the solidified material injection pipe 2 is discharged to the outside from the solidified material discharge port 21 opened near the tip and injected into the ground.

＜５＞浄化方法。
次に上記の浄化装置を使用して行う汚染土壌の浄化方法について説明する。 <5> Purification method.
Next, the purification method of the contaminated soil performed using said purification apparatus is demonstrated.

＜６＞準備の状態。（図２）
対象地盤の上に重機本体Ｂを停止し、外筒１と固化材注入管２とを一体としたオーガーＡをリーダーＣに接続、あるいは吊り下げる。
その際に、固化材注入管２のほとんどは外筒１の内部に収納してある。 <6> Preparation state. (Figure 2)
The heavy machinery main body B is stopped on the target ground, and the auger A in which the outer cylinder 1 and the solidifying material injection pipe 2 are integrated is connected to or suspended from the leader C.
At that time, most of the solidifying material injection pipe 2 is accommodated in the outer cylinder 1.

＜７＞オーガーＡの貫入。（図３）
固化材注入管２を外筒１内部に収納した状態で、外筒１を回転して地盤を攪拌しながらオーガーＡを地中に貫入する。
その場合に削孔が目的ではないから、現地の土砂を地中で混合攪拌するだけである。 <7> Intrusion of auger A. (Figure 3)
In a state where the solidifying material injection pipe 2 is housed in the outer cylinder 1, the auger A penetrates into the ground while rotating the outer cylinder 1 and stirring the ground.
In that case, since drilling is not the purpose, the local earth and sand are simply mixed and stirred in the ground.

＜８＞外筒１の引き上げ。（図４）
次に外筒１を回転し周囲の土砂を攪拌しながら引き上げる。
外筒１の引き上げの際には、外筒１の浄化材吐出口１２から浄化材を周囲の混合土砂の層の内部に吐出しながら行う。
その結果、地中には浄化材混合土の柱が形成され、浄化材の還元作用によってＶＯＣの層は浄化される。
外筒１の引き上げの場合に、外筒１と固化材注入管２は摺動自在であるから、外筒１のみを引き上げ、その内部の固化材注入管２は地盤中に残しておく。
なお、図の実施例では浄化材の吐出を外筒１の引き上げ時にのみ行うように説明してあるが、外筒１の引き上げ時だけでなく、掘進してゆく際にも行うことができる。あるいは往復して行うことができる。
少なくとも、外筒１の引き上げ時に浄化材の吐出を行えば目的を達成することができる。 <8> Pull up the outer cylinder 1. (Fig. 4)
Next, the outer cylinder 1 is rotated and the surrounding earth and sand are pulled up while stirring.
When the outer cylinder 1 is pulled up, the purification material is discharged from the purification material discharge port 12 of the outer cylinder 1 into the surrounding layer of mixed earth and sand.
As a result, a column of the purification material mixed soil is formed in the ground, and the VOC layer is purified by the reducing action of the purification material.
When the outer cylinder 1 is pulled up, the outer cylinder 1 and the solidifying material injection pipe 2 are slidable. Therefore, only the outer cylinder 1 is pulled up and the solidifying material injection pipe 2 inside is left in the ground.
In the illustrated embodiment, the cleaning material is discharged only when the outer cylinder 1 is pulled up. However, the cleaning material can be discharged not only when the outer cylinder 1 is pulled up, but also when digging. Or it can carry out reciprocatingly.
The objective can be achieved at least if the purifying material is discharged when the outer cylinder 1 is pulled up.

＜９＞固化材注入管２の引き上げ。（図５）
浄化材混合土の柱が形成されたら、次に固化材注入管２を引き上げる。
その際に、固化材注入管２の固化材吐出口２１から固化材を吐出しながら引き上げる。
浄化材混合土の柱の内部を通して固化材注入管２を引き上げることによって、地中に浄化材と固化材混合土が混合した柱を形成することができる。
こうして図６に示すように外筒１、固化材注入管２の両方が地上に引き上げられるので、ＶＯＣの層は連続した一連の作業により、まず浄化材により浄化され、続いて固化材によって地盤改良される。 <9> Pulling up the solidifying material injection pipe 2. (Fig. 5)
When the column of the purification material mixed soil is formed, the solidification material injection pipe 2 is then pulled up.
At that time, the solidifying material is pulled up while being discharged from the solidifying material discharge port 21 of the solidifying material injection pipe 2.
By pulling up the solidification material injection pipe 2 through the inside of the column of the purification material mixed soil, a column in which the purification material and the solidification material mixed soil are mixed can be formed in the ground.
Thus, as shown in FIG. 6, since both the outer cylinder 1 and the solidification material injection pipe 2 are pulled up to the ground, the VOC layer is first purified by the purification material through a series of continuous operations, and then the ground is improved by the solidification material. Is done.

＜１０＞他の実施例（図７、８）
上記の実施例では、１箇所の処理を継続して行う方法であった。
しかし、外筒１と固化材注入管２とを分離可能としておき、固化材注入管２を地中に残したまま、外筒１を分離する工法を採用することもできる。
その場合には分離した外筒１に別の新たな固化材注入管２を取り付ける。
そして、別の場所で新たに浄化材を吐出しながら外筒１のみを引き上げて、地中に固化材注入管２を残したままの浄化材混合土の柱を形成する。
重機Ｂを移動しながら上記の工程を繰り返して、順次複数本の浄化材混合土の柱を形成してゆく。（図７）
その後に地中に残しておいた、固化材注入管２にボーリングマシンなどの一般の注入機を取付ける。
そしてこの注入機を使用して固化材注入管２の固化材吐出口２１から固化材を吐出しながら浄化材混合土の柱の内部を引き上げて、地中に浄化材、固化材混合土の柱を形成して行う。
このような施工順序を採用すると効率的な連続施工を行うことができる。
<10> Other embodiments (FIGS. 7 and 8)
In the above-described embodiment, the process is performed continuously at one place.
However, it is also possible to adopt a method in which the outer cylinder 1 and the solidification material injection pipe 2 are separable and the outer cylinder 1 is separated while the solidification material injection pipe 2 remains in the ground.
In that case, another new solidification material injection pipe 2 is attached to the separated outer cylinder 1.
Then, only the outer cylinder 1 is pulled up while discharging the purification material anew at another location to form a column of the purification material mixed soil with the solidification material injection pipe 2 left in the ground.
The above steps are repeated while moving the heavy machinery B, and a plurality of purification material mixed soil columns are sequentially formed. (Fig. 7)
Thereafter, a general injection machine such as a boring machine is attached to the solidification material injection pipe 2 left in the ground.
And using this injection machine, the inside of the column of the purification material mixed soil is pulled up while discharging the solidification material from the solidification material discharge port 21 of the solidification material injection pipe 2, and the column of the purification material and the solidification material mixed soil is underground. To form.
If such a construction sequence is employed, efficient continuous construction can be performed.

本発明の汚染土壌の浄化装置の先端部の説明図。Explanatory drawing of the front-end | tip part of the purification apparatus of the contaminated soil of this invention. 汚染土壌の浄化方法の施工順序の説明図。Explanatory drawing of the construction order of the purification method of contaminated soil. 汚染土壌の浄化方法の施工順序の説明図。Explanatory drawing of the construction order of the purification method of contaminated soil. 汚染土壌の浄化方法の施工順序の説明図。Explanatory drawing of the construction order of the purification method of contaminated soil. 汚染土壌の浄化方法の施工順序の説明図。Explanatory drawing of the construction order of the purification method of contaminated soil. 汚染土壌の浄化方法の施工順序の説明図。Explanatory drawing of the construction order of the purification method of contaminated soil. 他の実施例の説明図。Explanatory drawing of another Example. 他の実施例の説明図。Explanatory drawing of another Example.

符号の説明Explanation of symbols

Ａ：オーガー
Ｂ：重機本体
Ｃ：リーダー
１：外筒
１１：攪拌翼
１２：浄化材吐出口
２：固化材注入管
２１：固化材吐出口
A: Auger B: Heavy machinery main body C: Leader 1: Outer cylinder 11: Stirring blade 12: Purifying material discharge port 2: Solidified material injection pipe 21: Solidified material discharge port

Claims (3)

揮発性有機化合物によって汚染された土壌の土砂を攪拌する浄化装置であって、
内部が中空で外部に攪拌翼を取付けた外筒と、
外筒に開口した浄化材吐出口と、
外筒内部にスライド自在に収納した固化材注入管と、
固化材注入管に開口した固化材吐出口とより構成したオーガーを、
重機のリーダーに取付けて構成した、
汚染土壌の浄化装置。
A purification device for agitating soil soil contaminated with volatile organic compounds,
An outer cylinder that is hollow inside and has a stirring blade attached to the outside;
A purification material discharge port opened in the outer cylinder;
A solidifying material injection pipe slidably housed inside the outer cylinder;
An auger composed of a solidifying material discharge port opened in the solidifying material injection pipe,
Installed and configured on a heavy machinery leader,
Purification equipment for contaminated soil.
揮発性有機化合物によって汚染された土壌を浄化する方法であって、
請求項１記載の汚染土壌の浄化装置を使用し、
固化材注入管を外筒内部に収納した状態で、外筒を回転して地盤を攪拌してオーガーを地中に貫入し、
次に外筒の浄化材吐出口から浄化材を吐出しながら、固化材注入管を地盤中に残した状態で、
外筒のみを回転させて引き上げて、地中に浄化材混合土の柱を形成し、
次に固化材注入管の固化材吐出口から固化材を吐出しながら浄化材混合土の柱の内部を引き上げて、
地中に浄化材、固化材混合土の柱を形成して行う、
汚染土壌の浄化方法。
A method for purifying soil contaminated with volatile organic compounds,
Using the contaminated soil purification apparatus according to claim 1,
With the solidification material injection pipe stored inside the outer cylinder, the outer cylinder is rotated to stir the ground and penetrate the auger into the ground.
Next, while discharging the purification material from the purification material discharge port of the outer cylinder, leaving the solidification material injection pipe in the ground,
Rotate only the outer cylinder and pull it up to form a column of purification material mixed soil in the ground,
Next, while discharging the solidification material from the solidification material discharge port of the solidification material injection pipe, pull up the inside of the column of the purification material mixed soil,
It is performed by forming pillars of mixed soil with purification material and solidification material in the ground.
Purification method for contaminated soil.
揮発性有機化合物によって汚染された土壌を浄化する方法であって、
請求項１記載の汚染土壌の浄化装置を使用し、
固化材注入管を外筒内部に収納した状態で、外筒を回転して地盤を攪拌してオーガーを地中に貫入し、
次に外筒の浄化材吐出口から浄化材を吐出しながら、固化材注入管を地盤中に残した状態で、
外筒のみを回転させて引き上げて、地中に浄化材混合土の柱を形成し、
上記の工程を繰り返して複数本の浄化材混合土の柱を形成し、
その後に、地盤中に残した固化材注入管の固化材吐出口から固化材を吐出しながら浄化材混合土の柱の内部を引き上げて、
地中に浄化材、固化材混合土の柱を形成して行う、
汚染土壌の浄化方法。



A method for purifying soil contaminated with volatile organic compounds,
Using the contaminated soil purification apparatus according to claim 1,
With the solidification material injection pipe stored inside the outer cylinder, the outer cylinder is rotated to stir the ground and penetrate the auger into the ground.
Next, while discharging the purification material from the purification material discharge port of the outer cylinder, leaving the solidification material injection pipe in the ground,
Rotate only the outer cylinder and pull it up to form a column of purification material mixed soil in the ground,
Repeat the above steps to form multiple columns of mixed soil for purification material,
After that, while discharging the solidification material from the solidification material discharge port of the solidification material injection pipe left in the ground, pull up the inside of the column of the purification material mixed soil,
It is performed by forming pillars of mixed soil with purification material and solidification material in the ground.
Purification method for contaminated soil.



JP2006010439A 2006-01-18 2006-01-18 Contaminated soil purification device and purification method Active JP4610013B2 (en)

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CN104624632B (en) * 2015-01-26 2017-01-18 东南大学 Remediation method for hexavalent chromium polluted soil and underground water

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5249977A (en) * 1975-10-20 1977-04-21 Konoike Constr Ltd Treating method of sealing up polluted soil with hexa valent chromium by reduction
JP2001311140A (en) * 2000-05-01 2001-11-09 Chem Grouting Co Ltd Hazardous material treatment method
JP2004016986A (en) * 2002-06-19 2004-01-22 Eniwa Kensetsu Kk System for modifying polluted soil
JP2004160391A (en) * 2002-11-14 2004-06-10 Nobuhiko Furukawa Method of improving soil quality
JP2005230710A (en) * 2004-02-20 2005-09-02 Ohbayashi Corp In situ insolubilization control apparatus and method for contaminated soil

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5249977A (en) * 1975-10-20 1977-04-21 Konoike Constr Ltd Treating method of sealing up polluted soil with hexa valent chromium by reduction
JP2001311140A (en) * 2000-05-01 2001-11-09 Chem Grouting Co Ltd Hazardous material treatment method
JP2004016986A (en) * 2002-06-19 2004-01-22 Eniwa Kensetsu Kk System for modifying polluted soil
JP2004160391A (en) * 2002-11-14 2004-06-10 Nobuhiko Furukawa Method of improving soil quality
JP2005230710A (en) * 2004-02-20 2005-09-02 Ohbayashi Corp In situ insolubilization control apparatus and method for contaminated soil

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