JP2012086222A - Method for cleaning underground oil-contaminated soil - Google Patents

Method for cleaning underground oil-contaminated soil Download PDF

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JP2012086222A
JP2012086222A JP2012001357A JP2012001357A JP2012086222A JP 2012086222 A JP2012086222 A JP 2012086222A JP 2012001357 A JP2012001357 A JP 2012001357A JP 2012001357 A JP2012001357 A JP 2012001357A JP 2012086222 A JP2012086222 A JP 2012086222A
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oil
pipe
perforated pipe
hole
perforated
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JP5340427B2 (en
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Norio Watanabe
則雄 渡辺
Shuzo Torou
修三 土路生
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Kumagai Gumi Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a method for cleaning underground oil-contaminated soil, which can efficiently remove oil in an oil-contaminated part and clean the underground oil-contaminated soil.SOLUTION: An oil adsorption treatment pipe 3 having an outside bored pipe 12 having a hole 11 and an oil adsorbent 13 set on the peripheral surface of the outside bored pipe to cover the hole of the outside bored pipe is arranged in the underground oil-contaminated part 2 or in the vicinity of the oil-contaminated part. After the oil in the oil-contaminated part is adsorbed on the oil adsorbent by sucking the oil through the inside of the outside bored pipe, on the inside of the outside bored pipe, a pipe device 50A having a bored pipe 52 having a plurality of holes 51 and a plurality of connection pipes 53 which are connected respectively with the holes from the inside of the bored pipe through one end opening of the bored pipe is set in the inside of the outside bored pipe to be able to move in the direction along the axis of the outside bored pipe. Microorganisms decomposing the oil adsorbed by the oil adsorbent are supplied from the inside of the bored pipe 52 of the pipe device 50A to the oil adsorbent 13 through the holes 51 of the bored pipe 52 and the hole 11 of the outside bored pipe 12.

Description

本発明は、有孔管の外側における有孔管の各孔近辺への微生物の均等供給、有孔管の外側における有孔管の各孔近辺の均等吸引を可能とした管装置を用いた地中油汚染土壌の浄化方法に関する。   The present invention provides a ground using a pipe device that enables the uniform supply of microorganisms to the vicinity of each hole of the perforated pipe on the outside of the perforated pipe, and the uniform suction of the vicinity of each hole of the perforated pipe on the outside of the perforated pipe. The present invention relates to a method for purifying soil contaminated with medium oil.

管の内周面と外周面とに跨って貫通する孔を複数備えた有孔管を地盤中に設置し、有孔管の複数の孔を介して地盤中に薬液を注入することが知られている（例えば、特許文献１等参照）。また、地中油汚染土壌に油を分解する微生物を供給することによって地中油汚染土壌を浄化する方法が提案されている（例えば、特許文献２，３等参照）。   It is known to install a perforated pipe with a plurality of holes penetrating the inner and outer peripheral surfaces of the pipe in the ground and inject the chemical into the ground through the holes of the perforated pipe (See, for example, Patent Document 1). In addition, a method for purifying underground oil-contaminated soil by supplying microorganisms that decompose oil to underground oil-contaminated soil has been proposed (see, for example, Patent Documents 2 and 3).

特開平７−２９２６５４号公報JP-A-7-292654 特開平９−２７６８３７号公報Japanese Patent Laid-Open No. 9-276837 特開平９−２７６８４０号公報JP-A-9-276840

上記有孔管を用いて、地中油汚染土壌の油を吸引したり、地中油汚染土壌に微生物を供給することが考えられる。しかしながら、上記有孔管では、吸引装置のような吸引側や、微生物培養装置のような供給側から近い孔と遠い孔とが存在し、供給側や吸引側から近い孔を介した吸引力や供給力が、供給側や吸引側から遠い孔を介した吸引力や供給力よりも大きくなる。よって、有孔管の外側における各孔の近辺に微生物を均等に供給することや、有孔管の外側における各孔の近辺を均等に吸引することができない。また、有孔管の特定の孔のみを介した吸引や供給を行うこともできない。
本発明は、上記課題に鑑みてなされたもので、有孔管の外側における各孔の近辺に微生物を均等に供給できるとともに、有孔管の外側における各孔の近辺を均等に吸引でき、また、有孔管の特定の孔のみを介した吸引や供給を行うことも可能な管装置を用いて、油汚染部の油を効率的に除去でき、地中油汚染土壌を効率的に浄化できる地中油汚染土壌の浄化方法を提供する。 It is conceivable to use the perforated pipe to suck the oil from the underground oil-contaminated soil or supply microorganisms to the underground oil-contaminated soil. However, in the perforated tube, there are a suction side such as a suction device, a hole near and far from the supply side such as a microorganism culture device, and a suction force through a hole close to the supply side and the suction side The supply force is greater than the suction force or supply force through a hole far from the supply side or the suction side. Therefore, it is not possible to uniformly supply microorganisms to the vicinity of each hole on the outside of the perforated tube or to uniformly suck the vicinity of each hole on the outside of the perforated tube. In addition, suction and supply through only specific holes of the perforated tube cannot be performed.
The present invention has been made in view of the above problems, and can uniformly supply microorganisms to the vicinity of each hole on the outside of the perforated tube, and can uniformly suck the vicinity of each hole on the outside of the perforated tube. Using a pipe device that can perform suction and supply only through a specific hole in a perforated pipe, the oil in the oil-contaminated part can be removed efficiently, and the ground oil-contaminated soil can be efficiently purified A method for remediation of soil contaminated with medium oil is provided.

本発明の地中油汚染土壌の浄化方法は、管の内周面と外周面とに跨って貫通する孔を備えた外側有孔管と外側有孔管の孔を覆うように外側有孔管の外周面に設けられた油吸着材とを備えた油吸着処理管を地中の油汚染部又は油汚染部の近傍に設置し、油汚染部の油を外側有孔管内経由で吸引することによって油吸着材に油を吸着させた後に、外側有孔管の内側に、管の内周面と外周面とに跨って貫通する孔を複数備えた有孔管と当該有孔管の一方の端部開口を経由して当該有孔管の内側から複数の孔に個々に連結された複数の連結管とを備えた管装置を外側有孔管の軸に沿った方向に移動可能に設置して、油吸着材に吸着された油を分解する微生物を管装置の有孔管内から当該有孔管の孔及び外側有孔管の孔を通して油吸着材に供給したことを特徴とする。
本発明の地中油汚染土壌の浄化方法は、管の内周面と外周面とに跨って貫通する孔を備えた外側有孔管を地中の油汚染部又は油汚染部の近傍に設置し、外側有孔管の内側に油吸着材を設置した状態で油汚染部の油を外側有孔管内経由で吸引することによって油吸着材に油を吸着させた後に、油を吸着した油吸着材を地上に取り出し、その後、外側有孔管の内側に、管の内周面と外周面とに跨って貫通する孔を複数備えた有孔管と当該有孔管の一方の端部開口を経由して当該有孔管の内側から複数の孔に個々に連結された複数の連結管とを備えた管装置を外側有孔管の軸に沿った方向に移動可能に設置して、油を分解する微生物を管装置の有孔管経由で外側有孔管内に供給し、外側有孔管の孔を経由して外側有孔管の周囲に微生物を供給したことを特徴とする。
また、管装置は、有孔管の両端部の外周面にパッカーを備えたものを用いたことも特徴とする。
本発明の地中油汚染土壌の浄化方法によれば、有孔管の外側における各孔の近辺に微生物を均等に供給できるとともに、有孔管の外側における各孔の近辺を均等に吸引でき、また、有孔管の特定の孔のみを介した吸引や供給を行うことも可能な管装置を用いたので、油汚染部の油を効率的に除去でき、地中油汚染土壌を効率的に浄化できる。
また、有孔管の両端部の外周面にパッカーを備えたので、吸引箇所や供給箇所を任意に決めることができるようになる。 The method for purifying underground oil-contaminated soil according to the present invention includes an outer perforated pipe having a hole penetrating the inner peripheral surface and the outer peripheral surface of the pipe and an outer perforated pipe so as to cover the hole of the outer perforated pipe. By installing an oil adsorption treatment tube with an oil adsorbent provided on the outer peripheral surface in the vicinity of the underground oil-contaminated part or oil-contaminated part, and sucking the oil in the oil-contaminated part through the outer perforated pipe After adsorbing oil to the oil adsorbent, a perforated pipe having a plurality of holes penetrating the inner perimeter and outer perimeter of the pipe inside the outer perforated pipe and one end of the perforated pipe A pipe device provided with a plurality of connecting pipes individually connected to a plurality of holes from the inside of the perforated pipe through the opening of the part, and movably installed in a direction along the axis of the outer perforated pipe The microorganisms that decompose the oil adsorbed on the oil adsorbent were supplied from the inside of the perforated pipe of the pipe device to the oil adsorbent through the hole of the perforated pipe and the hole of the outer perforated pipe. And features.
In the method for purifying underground oil-contaminated soil according to the present invention, an outer perforated pipe having a hole penetrating the inner peripheral surface and the outer peripheral surface of the pipe is installed in the underground oil-contaminated part or in the vicinity of the oil-contaminated part. An oil adsorbent that adsorbs oil after the oil is adsorbed to the oil adsorbent by sucking the oil in the oil contaminated part via the inside of the outer perforated pipe with the oil adsorbent installed inside the outer perforated pipe And then, through the perforated pipe having a plurality of holes penetrating the inner peripheral surface and the outer peripheral surface of the pipe inside the outer perforated pipe and one end opening of the perforated pipe Then, a pipe device having a plurality of connecting pipes individually connected to a plurality of holes from the inside of the perforated pipe is installed so as to be movable in the direction along the axis of the outer perforated pipe, and the oil is decomposed. The microorganism to be supplied is supplied into the outer perforated pipe via the perforated pipe of the pipe device, and the microorganism is supplied around the outer perforated pipe via the hole of the outer perforated pipe. The features.
Further, the pipe device is also characterized in that a perforated pipe having a packer on the outer peripheral surface at both ends is used.
According to the method for purifying underground oil-contaminated soil of the present invention, microorganisms can be evenly supplied to the vicinity of each hole on the outside of the perforated pipe, and the vicinity of each hole on the outside of the perforated pipe can be uniformly sucked. Since the pipe device that can perform suction and supply only through a specific hole of the perforated pipe is used, the oil in the oil-contaminated part can be removed efficiently, and the underground oil-contaminated soil can be purified efficiently .
Further, since the outer peripheral surfaces of the both end portions of the perforated tube are provided with packers, the suction location and the supply location can be arbitrarily determined.

管装置を示し、（ａ）は側面図、（ｂ）は（ａ）のＡ−Ａ断面図（実施形態１）。A pipe apparatus is shown, (a) is a side view, (b) is AA sectional drawing of (a) (Embodiment 1). 管装置を示す側面図（実施形態１）。A side view showing a pipe device (embodiment 1). 浄化装置を示す図（実施形態１）。The figure which shows the purification apparatus (Embodiment 1). 浄化装置の油吸引時を説明した断面図（実施形態２）。Sectional drawing explaining the time of oil suction of a purification apparatus (Embodiment 2). 浄化装置の微生物供給時を説明した断面図（実施形態２）。Sectional drawing explaining the microorganisms supply time of a purification apparatus (Embodiment 2). 浄化装置を示す図（実施形態３）。The figure which shows the purification | cleaning apparatus (Embodiment 3). 浄化装置の油吸引時を説明した断面図（実施形態３）。Sectional drawing explaining the time of oil suction of a purification apparatus (Embodiment 3). 浄化装置の微生物供給時を説明した断面図（実施形態３）。Sectional drawing explaining the microorganisms supply time of a purification apparatus (Embodiment 3).

実施形態１
図１は本発明の実施形態１の浄化方法に使用可能な管装置を示し、図１（ａ）は管装置の外観を示し、図１（ｂ）は図１（ａ）のＡ−Ａ断面を示す。
図１に示すように、管装置５０は、管の内周面と外周面とに跨って貫通する孔５１を複数備えた有孔管５２と、有孔管５２の一方の端部開口５５を経由して有孔管５２の内側から複数の孔５１に個々に連結された複数の連結管５３とを備える。即ち、管装置５０は、有孔管５２の一方の端部開口５５を経由して有孔管５２の内側に延長した連結管５３の一端開口５４と有孔管５２の孔５１とが互いに連結され、連結管５３の他端開口５６が有孔管５２の一方の端部開口５５より有孔管５２の外側に延長されたことによって、連結管５３の他端開口５６と有孔管５２の外周面５７との間に、連結管５３の管路と有孔管５２の孔５１とで形成された通路６０が複数形成された構成である。通路６０を備えたことにより、連結管５３の他端開口５６と有孔管５２の外周面５７との間において、通路６０を介して、油、水、微生物、薬液などの物質を流通させることが可能となる。連結管５３の一端開口５４と有孔管５２の孔５１との連結構成は、例えば、連結管５３の一端開口５４が有孔管５２の内側から有孔管５２の孔５１内に挿入されて連結管５３の一端開口５４の外周面と孔５１の孔内壁面とが接着剤などで接着されたことによって互いに連結された構成とすればよい。有孔管５２の他方の端部５８は塞がれる。有孔管５２の一方の端部開口５５と導管５９の一方の端部開口とが接着剤などで互いに連結され、有孔管５２の複数の孔５１に個々に連結された複数の連結管５３の個々の他端開口５６が導管５９の内側を経由して供給側や吸引側に導かれ、複数の連結管５３の個々の他端開口５６が導管５９の他方の端部開口５８ａ（図３参照）より外側に突出して供給側や吸引側に接続される。即ち、有孔管５２の複数の孔５１に個々に連結された複数の連結管５３の他端開口５６が、吸引装置４（図３参照）のような吸引源、あるいは、微生物培養装置５（図３参照）のような供給源に接続される。 Embodiment 1
FIG. 1 shows a pipe device that can be used in the purification method of Embodiment 1 of the present invention, FIG. 1 (a) shows the appearance of the pipe device, and FIG. 1 (b) is a cross-sectional view taken along line AA in FIG. Indicates.
As shown in FIG. 1, the pipe device 50 includes a perforated pipe 52 provided with a plurality of holes 51 penetrating over an inner peripheral surface and an outer peripheral face of the pipe, and one end opening 55 of the perforated pipe 52. And a plurality of connecting pipes 53 individually connected to the plurality of holes 51 from the inside of the perforated pipe 52. That is, in the pipe device 50, the one end opening 54 of the connecting pipe 53 extending to the inside of the perforated pipe 52 via the one end opening 55 of the perforated pipe 52 and the hole 51 of the perforated pipe 52 are connected to each other. The other end opening 56 of the connecting pipe 53 is extended to the outside of the perforated pipe 52 from the one end opening 55 of the perforated pipe 52, whereby the other end opening 56 of the connecting pipe 53 and the perforated pipe 52 are connected. A plurality of passages 60 formed by the pipe line of the connecting pipe 53 and the hole 51 of the perforated pipe 52 are formed between the outer peripheral surface 57 and the outer peripheral surface 57. By providing the passage 60, substances such as oil, water, microorganisms, and chemicals are circulated through the passage 60 between the other end opening 56 of the connecting pipe 53 and the outer peripheral surface 57 of the perforated pipe 52. Is possible. The connection configuration of the one end opening 54 of the connecting pipe 53 and the hole 51 of the perforated pipe 52 is, for example, that the one end opening 54 of the connecting pipe 53 is inserted into the hole 51 of the perforated pipe 52 from the inside of the perforated pipe 52. What is necessary is just to set it as the structure mutually connected by adhere | attaching the outer peripheral surface of the one end opening 54 of the connection pipe 53, and the hole inner wall face of the hole 51 with an adhesive agent. The other end 58 of the perforated tube 52 is closed. One end opening 55 of the perforated pipe 52 and one end opening of the conduit 59 are connected to each other with an adhesive or the like, and a plurality of connecting pipes 53 are individually connected to the plurality of holes 51 of the perforated pipe 52. The other end openings 56 are guided to the supply side and the suction side via the inside of the conduit 59, and the other end openings 56 of the plurality of connecting pipes 53 are connected to the other end opening 58a of the conduit 59 (FIG. 3). (Refer to Fig. 1) and project to the outside and connected to the supply side and suction side. That is, the other end openings 56 of the plurality of connection pipes 53 individually connected to the plurality of holes 51 of the perforated pipe 52 are used as a suction source such as the suction apparatus 4 (see FIG. 3) or the microorganism culture apparatus 5 ( Connected to a source such as FIG.

当該管装置５０によれば、例えば、管装置５０の有孔管５２を地中汚染土壌に設置した場合、連結管５３を介した吸引により、有孔管５２の外側における各孔５１の近辺の地下水や油を均等に吸引できるようになる。また、連結管５３を介した供給により、有孔管５２の外側における各孔５１の近辺に微生物を均等に供給できるようになる。さらに、特定の連結管５３及び孔５１を介した吸引や供給を行うことも可能となる。尚、吸引装置４の吸引口２３や微生物培養装置５の注入口２４の数を連結管５３の数に対応した数だけ設けて複数の連結管５３による吸引や供給を同時に行ってもよいし、吸引装置４の１つの吸引口２３や微生物培養装置５の１つの注入口２４に連結管５３を１つずつ順番に付け替えていって１本の連結管５３毎に吸引や供給を行ってもよい。１本の連結管５３毎に吸引や供給を行う場合、吸引時間や供給時間を一定にすることで均等吸引や均等供給を行うことができる。
また、有孔管５２の複数の孔５１に個々に連結された複数の連結管５３を内側に収納して供給側や吸引側に導く導管５９を備えたので、管装置５０を地中に設置したり地中から取り出したりする際の連結管５３の損傷を防止できる。 According to the pipe device 50, for example, when the perforated pipe 52 of the pipe device 50 is installed in the underground contaminated soil, suction around the perforated pipe 52 near each hole 51 by suction through the connecting pipe 53. It becomes possible to suck groundwater and oil evenly. Further, the supply through the connecting pipe 53 enables the microorganisms to be supplied uniformly to the vicinity of the holes 51 outside the perforated pipe 52. Further, it is possible to perform suction and supply through a specific connecting pipe 53 and hole 51. The number of suction ports 23 of the suction device 4 and the number of injection ports 24 of the microorganism culturing device 5 may be provided in a number corresponding to the number of the connection pipes 53, and suction and supply by the plurality of connection pipes 53 may be performed simultaneously. The connection pipes 53 may be sequentially replaced one by one in the suction port 23 of the suction device 4 and one injection port 24 of the microorganism culture device 5, and suction or supply may be performed for each connection pipe 53. . When suction or supply is performed for each of the connecting pipes 53, uniform suction or uniform supply can be performed by keeping the suction time or supply time constant.
In addition, since a plurality of connecting pipes 53 individually connected to the plurality of holes 51 of the perforated pipe 52 are housed inside and led to the supply side or the suction side, the pipe 59 is installed in the ground. It is possible to prevent damage to the connecting pipe 53 when taking out or taking out from the ground.

図２に示すように、上記管装置５０における有孔管５２の両端部６１；６２の外周面にパッカー６３を備えた管装置５０Ａを構成してもよい。パッカー６３は、ゴムのような弾性体により浮輪のようなリング袋状に形成されたものであり、水のような流体を袋内に取り込んで膨らむ。尚、パッカー６３には、図外の流体取込口が設けられ、図外の流体供給管の一端開口と流体取込口とが繋がれ、流体供給管の他端開口とこの流体供給管に流体を供給する図外の流体供給装置の流体排出口とが繋がれる。   As shown in FIG. 2, a pipe device 50 </ b> A having a packer 63 on the outer peripheral surfaces of both end portions 61; 62 of the perforated pipe 52 in the pipe device 50 may be configured. The packer 63 is formed in a ring bag shape like a floating ring by an elastic body such as rubber, and takes in a fluid such as water into the bag and swells. The packer 63 is provided with a fluid intake port (not shown), one end opening of the fluid supply pipe (not shown) and the fluid intake port are connected, and the other end opening of the fluid supply tube and the fluid supply tube are connected to each other. A fluid discharge port of a fluid supply device (not shown) that supplies fluid is connected.

上記管装置５０Ａによれば、パッカー６３を備えたので、管装置５０Ａを図外の外側有孔管の内側に設けて使用したり、管装置５０Ａを地盤に形成した地盤孔内に挿入して使用する場合において、外側有孔管内や地盤孔内での管装置５０Ａの位置を任意に決めることができるようになり、外側有孔管内や地盤孔内での吸引箇所や供給箇所を任意に決めることができる。よって、吸引箇所や供給箇所を特定することによって、特定場所での集中吸引や特定場所への集中供給が可能となる。   According to the pipe device 50A, since the packer 63 is provided, the pipe device 50A is provided inside the outer perforated pipe (not shown), or the pipe device 50A is inserted into a ground hole formed in the ground. In use, the position of the pipe device 50A in the outer perforated pipe or the ground hole can be arbitrarily determined, and the suction point or the supply position in the outer perforated pipe or the ground hole is arbitrarily determined. be able to. Therefore, by specifying the suction location and the supply location, it is possible to perform concentrated suction at a specific location and concentrated supply to a specific location.

図３を参照し、上記管装置５０Ａを用いた地中油汚染土壌の浄化方法を説明する。地中油汚染土壌の浄化装置１は、機械工場のような建屋７下の地中８においてＡ重油や機械油などの油で汚染された油汚染部２の位置又は油汚染部２の近傍位置（以下、油汚染部２の位置又は油汚染部２の近傍位置を目標設置位置という）に設置される油吸着処理管３と、吸引装置４と、微生物培養装置５と、油吸着処理管３と吸引装置４や微生物培養装置５とを繋ぐ連結管６と、管装置５０Ａ（図２参照）とを備える。   With reference to FIG. 3, the purification method of underground oil-contaminated soil using the said pipe apparatus 50A is demonstrated. The underground oil-contaminated soil purification device 1 is a position of the oil-contaminated part 2 contaminated with oil such as A heavy oil or machine oil in the underground 8 under the building 7 such as a machine factory or in the vicinity of the oil-contaminated part 2 ( Hereinafter, the oil adsorption processing tube 3, the suction device 4, the microorganism culturing device 5, and the oil adsorption processing tube 3 installed at the position of the oil contamination unit 2 or the vicinity of the oil contamination unit 2 are referred to as target installation positions) A connecting tube 6 that connects the suction device 4 and the microorganism culture device 5 and a tube device 50A (see FIG. 2) are provided.

図４に示すように、油吸着処理管３は、管の内周面と外周面とに跨って貫通する孔１１を複数個備えた外側有孔管１２と、外側有孔管１２の孔１１を覆うように外側有孔管１２の外周面に設けられた油吸着材１３とを備える。油吸着材１３としては、親油性でかつ疎水性の物質を用いればよく、例えば、椴松（とどまつ）ファイバーを用いる。椴松ファイバーは、椴松の木屑を２００℃〜５００℃で焼いて糸状に形成されたものである。この椴松ファイバーが不織布などの多孔質材料により形成された被覆材としての袋１５内に入れられ、この椴松ファイバーを封入した袋１５が外側有孔管１２の孔１１を塞ぐように外側有孔管１２の外周面に巻き付けられたりして取り付けられることによって、油吸着材１３が外側有孔管１２の孔１１を塞ぐように外側有孔管１２の外周面に設けられる。袋１５は、油吸着処理管３が地中に形成された横孔２１内の目標設置位置に設置される場合に、油吸着材１３の損傷を防止するとともに、油汚染部２の油を通過させて油吸着材１３に吸着させる。油吸着材１３と袋１５とにより油吸着部７０が形成される。即ち、油吸着処理管３は、外側有孔管１２の外周面に外側有孔管１２の孔１１を覆うように油吸着部７０を備えた構成である。   As shown in FIG. 4, the oil adsorption processing tube 3 includes an outer perforated tube 12 having a plurality of holes 11 penetrating the inner peripheral surface and the outer peripheral surface of the tube, and a hole 11 of the outer perforated tube 12. And an oil adsorbent 13 provided on the outer peripheral surface of the outer perforated tube 12. As the oil adsorbing material 13, a lipophilic and hydrophobic substance may be used, and for example, a tomatsu fiber is used. Juniper fiber is a fiber formed by burning wood pine wood chips at 200 ° C to 500 ° C. This pine fiber is put in a bag 15 as a covering material formed of a porous material such as a nonwoven fabric, and the bag 15 enclosing the pine fiber is provided with an outer layer so as to block the hole 11 of the outer perforated tube 12. The oil adsorbing material 13 is provided on the outer peripheral surface of the outer perforated tube 12 so as to close the hole 11 of the outer perforated tube 12 by being wound around or attached to the outer peripheral surface of the perforated tube 12. The bag 15 prevents the oil adsorbent 13 from being damaged and passes the oil in the oil-contaminated part 2 when the oil adsorption processing pipe 3 is installed at a target installation position in the horizontal hole 21 formed in the ground. It is made to adsorb | suck to the oil adsorbent 13. An oil adsorbing portion 70 is formed by the oil adsorbing material 13 and the bag 15. That is, the oil adsorption processing tube 3 is configured to include the oil adsorption portion 70 on the outer peripheral surface of the outer perforated tube 12 so as to cover the hole 11 of the outer perforated tube 12.

連結管６は、外側有孔管１２と一体の管、あるいは、一端が外側有孔管１２の他端と繋がれる無孔管（管の内周面と外周面とに跨って貫通する孔が形成されていない管）により形成される。外側有孔管１２の一端２５は塞がれる。外側有孔管１２が地中に形成された横孔２１内を経由して目標設置位置に設置されるが、この際、連結管６としては、目標設置位置から横孔２１を経由して地上に届くまでの長さＸ（図示せず）以上のものを用いることによって、油吸着処理管３が目標設置位置に設置された場合に、連結管６の他端２２が横孔２１の始端口３０より地上に引き出される。   The connecting pipe 6 is a pipe integral with the outer perforated pipe 12 or a non-porous pipe whose one end is connected to the other end of the outer perforated pipe 12 (a hole penetrating over the inner and outer peripheral surfaces of the pipe). Formed by an unformed tube). One end 25 of the outer perforated tube 12 is closed. The outer perforated pipe 12 is installed at the target installation position via the inside of the horizontal hole 21 formed in the ground. At this time, the connecting pipe 6 is connected to the ground via the horizontal hole 21 from the target installation position. When the oil adsorption processing pipe 3 is installed at the target installation position, the other end 22 of the connecting pipe 6 is the starting end of the lateral hole 21 by using a pipe having a length X (not shown) or more until it reaches It is drawn to the ground from 30.

外側有孔管１２を目標設置位置に設置する方法について説明する。まず、先端に採取管を備えた図外のボーリング装置を用いてボーリング調査を行い、建屋７下の地中の油汚染部２の位置を確かめる。そして、図外の自由曲線掘削機を用いて目標設置位置を通過する横孔２１を形成する。自由曲線掘削機は、曲がり可能な鋼製中空ロッドと、ロッドの先端に設けられた掘削ビットと、ロッドの先端部に設けられた位置検出センサと、鋼製中空ロッドを前後動させたり回転させたりするための駆動装置とを備える。掘削ビットは、先端に、円柱体の一端が斜めに切り落とされたような楕円形面を備える。直線状に掘削する場合には、ロッドを回転させて掘削ビットで土砂を切削しながら進行する。曲線状に掘削する場合は、ロッドの回転を止めて、掘削ビットを土砂に押し当てることによって、掘削ビットが地山からの反力を受けて曲線状に推進する。掘削始点から自由曲線掘削機を用いて目標設置位置を通過して地上に突き抜ける横孔２１を形成した後に、地上に出た掘削ビットをリーマビットに付け替える。油吸着処理管３を備えた長さＸ以上の連結管６の他端２２をリーマビットの後部に取付け、リーマビットを横孔２１の終端口から横孔２１内に挿入して横孔２１の内壁を外側有孔管１２の径に合うようにリーマビットで切削しながらリーマビットを横孔２１の始端口３０まで戻す。以上により、横孔２１内の目標設置位置に油吸着処理管３が設置され、連結管６の他端２２が横孔２１の始端口３０より地上に引き出される。   A method for installing the outer perforated pipe 12 at the target installation position will be described. First, a boring survey is performed using a boring device (not shown) provided with a sampling tube at the tip, and the position of the oil-contaminated part 2 in the ground below the building 7 is confirmed. And the horizontal hole 21 which passes a target installation position using the free curve excavator outside a figure is formed. A free-curved excavator is a steel hollow rod that can be bent, a drilling bit provided at the tip of the rod, a position detection sensor provided at the tip of the rod, and a steel hollow rod that moves back and forth. And a driving device. The excavation bit has an elliptical surface such that one end of the cylindrical body is cut off obliquely at the tip. When excavating in a straight line, the rod is rotated and the excavation bit advances while cutting the earth and sand. When excavating in a curved line, the rotation of the rod is stopped and the excavation bit is pressed against the earth and sand, so that the excavation bit receives a reaction force from the natural ground and propels it into a curved line. After forming the horizontal hole 21 that passes through the target installation position and penetrates the ground using a free-curved excavator from the excavation start point, the excavation bit that has come out on the ground is replaced with a reamer bit. The other end 22 of the connecting pipe 6 having a length X or more provided with the oil adsorption processing pipe 3 is attached to the rear part of the reamer bit, and the reamer bit is inserted into the lateral hole 21 from the terminal end of the lateral hole 21 to thereby connect the inner wall of the lateral hole 21. The reamer bit is returned to the starting end 30 of the lateral hole 21 while cutting with the reamer bit so as to match the diameter of the outer perforated tube 12. As described above, the oil adsorption processing pipe 3 is installed at the target installation position in the horizontal hole 21, and the other end 22 of the connecting pipe 6 is pulled out from the start end 30 of the horizontal hole 21 to the ground.

浄化装置１を用いて地中油汚染土壌を浄化する方法を説明する。自由曲線掘削機により目標設置位置を通過する横孔２１が形成される。横孔２１内に挿入された油吸着処理管３が目標設置位置に設置された後に、地上に出された連結管６の他端２２と吸引装置４の吸引口２３とが互いに繋がれる。そして、吸引装置４が駆動して油吸着処理管３の外側有孔管１２内を吸引すると、油吸着処理管３の周囲の油汚染部２の油が地下水とともに孔１１の方向に吸引されて、地下水が油吸着材１３を通過して吸引装置４に吸引され、油が油吸着材１３に吸着される。   A method for purifying underground oil-contaminated soil using the purification device 1 will be described. A horizontal hole 21 passing through the target installation position is formed by the free curve excavator. After the oil adsorption processing tube 3 inserted into the horizontal hole 21 is installed at the target installation position, the other end 22 of the connecting tube 6 and the suction port 23 of the suction device 4 connected to each other are connected to each other. Then, when the suction device 4 is driven to suck the inside of the outer perforated pipe 12 of the oil adsorption processing pipe 3, the oil in the oil contaminated portion 2 around the oil adsorption processing pipe 3 is sucked in the direction of the hole 11 together with the groundwater. The groundwater passes through the oil adsorbent 13 and is sucked into the suction device 4, and the oil is adsorbed onto the oil adsorbent 13.

その後、連結管６の他端２２が吸引装置４の吸引口２３から外され、連結管６の他端２２の開口から管装置５０Ａが挿入されて管装置５０Ａの有孔管５２が外側有孔管１２の内側の任意の位置に止められる。この状態で図５に示すように流体供給装置及び流体供給管がパッカー６３内に流体を供給してパッカー６３が膨らむことによって、パッカー６３が有孔管５２の外周面と外側有孔管１２の内周面との間を塞ぐ。そして、有孔管５２の複数の孔５１に個々に連結された複数の連結管５３の他端開口５６と微生物培養装置５の注入口２４とが互いに繋がれ、微生物培養装置５において培養液で培養された微生物と培養液とが一緒に微生物培養装置５から連結管５３経由で外側有孔管１２内に供給される。これにより、微生物が外側有孔管１２の孔１１、袋１５を経由して油吸着材１３に付着し、油吸着材１３に付着した微生物が油吸着材１３に吸着された油を分解する。つまり、油汚染部２の油が吸引により油吸着材１３に集中して吸着され、微生物が外側有孔管１２の外周面に設置された油吸着材１３に孔１１を通して効率的に付着するので、油吸着材１３に付着した微生物が油吸着材１３に吸着された油を効率的に分解する。   Thereafter, the other end 22 of the connecting tube 6 is removed from the suction port 23 of the suction device 4, and the tube device 50A is inserted from the opening of the other end 22 of the connecting tube 6, so that the perforated tube 52 of the tube device 50A is an outer perforated hole. It can be stopped at any position inside the tube 12. In this state, as shown in FIG. 5, the fluid supply device and the fluid supply pipe supply fluid into the packer 63 and the packer 63 expands, so that the packer 63 has an outer peripheral surface of the perforated pipe 52 and the outer perforated pipe 12. Block between the inner periphery. The other end openings 56 of the plurality of connection pipes 53 individually connected to the plurality of holes 51 of the perforated pipe 52 and the injection port 24 of the microorganism culture apparatus 5 are connected to each other. The cultured microorganism and the culture solution are supplied together from the microorganism culture device 5 into the outer perforated tube 12 via the connecting tube 53. Thereby, microorganisms adhere to the oil adsorbing material 13 via the holes 11 and the bags 15 of the outer perforated tube 12, and the microorganisms adhering to the oil adsorbing material 13 decompose the oil adsorbed on the oil adsorbing material 13. That is, the oil in the oil-contaminated part 2 is concentrated and adsorbed on the oil adsorbing material 13 by suction, and microorganisms adhere efficiently to the oil adsorbing material 13 installed on the outer peripheral surface of the outer perforated tube 12 through the holes 11. The microorganisms adhering to the oil adsorbing material 13 efficiently decomposes the oil adsorbed on the oil adsorbing material 13.

その後、油汚染部２の油の残り具合をボーリング調査で調べ、油の残りが多ければ、さらに、吸引装置４により連結管６内及び外側有孔管１２内を吸引して外側有孔管１２内の水分を吸引するとともに油汚染部２の油分と地下水とを吸引して油吸着材１３に油を吸着させる。尚、微生物が外側有孔管１２内に供給された後の吸引装置４による吸引作業は、外側有孔管１２内に供給された微生物が油吸着材１３に付着して油吸着材１３の油を分解するのに必要な時間を待ってから行う。例えば、外側有孔管１２内に微生物が供給されてから１週間程度経過してから吸引作業を行う。吸引作業の後、上述と同じように、微生物を外側有孔管１２内に供給する。つまり、油汚染部２の油の残り具合を調べながら、吸引作業と微生物供給作業とを繰り返すことによって、油汚染部２の油を除去する。   Thereafter, the remaining amount of oil in the oil-contaminated part 2 is examined by a boring investigation. If there is a large amount of remaining oil, the inside of the connecting tube 6 and the outer perforated tube 12 is further sucked by the suction device 4 and the outer perforated tube 12 is sucked. The oil in the oil-contaminated part 2 and the groundwater are sucked and the oil adsorbing material 13 is made to adsorb the oil while sucking the water inside. Note that the suction operation by the suction device 4 after the microorganisms are supplied into the outer perforated pipe 12 is that the microorganisms supplied into the outer perforated pipe 12 adhere to the oil adsorbent 13 and the oil in the oil adsorbent 13 Wait for the time required to disassemble. For example, the suction operation is performed after about one week has passed since the microorganisms were supplied into the outer perforated tube 12. After the suction operation, the microorganisms are supplied into the outer perforated tube 12 as described above. That is, the oil in the oil-contaminated part 2 is removed by repeating the suction operation and the microorganism supply operation while examining the remaining amount of oil in the oil-contaminated part 2.

実施形態１によれば、外側有孔管１２の孔１１を塞ぐように外側有孔管１２の外周面に設けられた油吸着材１３を備えた油吸着処理管３を目標設置位置に設置し、油汚染部２の油を外側有孔管１２内から吸引することによって油吸着材１３に吸着させた後に、管装置５０Ａを用いて外側有孔管１２内に微生物を供給することによって油吸着材１３に吸着された油を微生物に分解させたので、油汚染部２の油を外側有孔管１２の外周面に設けた油吸着材１３に集中させることができ、そして油吸着材１３に集中させた油を微生物で分解させることによって油汚染部２の油を効率的に除去でき、地中油汚染土壌を効率的に浄化できる。また、油吸着材１３が袋１５で覆われたので、油吸着材１３の損傷を防止できる。また、管装置５０Ａを用いたので、微生物供給箇所を特定できるとともに、連結管５３を介した供給により、有孔管５２の外側における各孔５１の近辺に微生物を均等に供給できるようになり、パッカー６３とパッカー６３との間の空間内に微生物を均等に供給できる。   According to the first embodiment, the oil adsorption processing tube 3 including the oil adsorbing material 13 provided on the outer peripheral surface of the outer perforated tube 12 so as to close the hole 11 of the outer perforated tube 12 is installed at the target installation position. After the oil in the oil-contaminated part 2 is adsorbed to the oil adsorbing material 13 by sucking the oil from the outer perforated pipe 12, the oil is adsorbed by supplying microorganisms into the outer perforated pipe 12 using the pipe device 50A. Since the oil adsorbed on the material 13 is decomposed into microorganisms, the oil in the oil-contaminated part 2 can be concentrated on the oil adsorbing material 13 provided on the outer peripheral surface of the outer perforated tube 12. By decomposing concentrated oil with microorganisms, the oil in the oil-contaminated part 2 can be efficiently removed, and underground oil-contaminated soil can be efficiently purified. Moreover, since the oil adsorbent 13 is covered with the bag 15, damage to the oil adsorbent 13 can be prevented. In addition, since the pipe device 50A is used, the microorganism supply location can be specified, and the supply through the connecting pipe 53 enables the microorganisms to be supplied uniformly to the vicinity of the holes 51 outside the perforated pipe 52. Microorganisms can be evenly supplied into the space between the packer 63 and the packer 63.

実施形態２
実施形態１において、管装置５０Ａの有孔管５２を外側有孔管１２の内側の任意の位置に設置して、管装置５０Ａを用いた吸引作業を行った後に、続けて、管装置５０Ａを用いた微生物供給作業を行うようにしてもよい。
実施形態２によれば、管装置５０Ａを用いたことにより、吸引箇所を特定できるとともに、連結管５３を介した吸引により、有孔管５２の外側における各孔５１の近辺の地下水や油を均等に吸引できるようになる。 Embodiment 2
In the first embodiment, the perforated pipe 52 of the pipe device 50A is installed at an arbitrary position inside the outer perforated pipe 12, and after the suction operation using the pipe device 50A is performed, the pipe device 50A is continued. The used microorganism supply operation may be performed.
According to the second embodiment, by using the pipe device 50A, the suction location can be specified, and ground water and oil in the vicinity of each hole 51 on the outside of the perforated pipe 52 can be evenly distributed by suction through the connecting pipe 53. Can be sucked into.

実施形態３
図６;図７に示すように、外側有孔管１２の内側に油吸着部７５を備えた構成の油吸着処理管７６を目標設置位置に設置し、外側有孔管１２の外側の油汚染部２の油を油吸着部７５に吸着させた後に、油を吸着した油吸着部７５を外側有孔管１２の内側より取り出し、その後、図８に示すように、外側有孔管１２の内側に管装置５０Ａの有孔管５２を設置して外側有孔管１２内に微生物を供給するようにしてもよい。これにより、外側有孔管１２内に供給された微生物が孔１１を介して外側有孔管１２の外側の油汚染部２に供給されることになる。 Embodiment 3
6; As shown in FIG. 7, an oil adsorption treatment pipe 76 having an oil adsorption portion 75 inside the outer perforated pipe 12 is installed at the target installation position, and oil contamination outside the outer perforated pipe 12 is achieved. After the oil in the part 2 is adsorbed by the oil adsorbing part 75, the oil adsorbing part 75 that has adsorbed the oil is taken out from the inside of the outer perforated pipe 12, and then the inside of the outer perforated pipe 12 as shown in FIG. The perforated tube 52 of the tube device 50 </ b> A may be installed to supply microorganisms into the outer perforated tube 12. Thereby, the microorganisms supplied into the outer perforated pipe 12 are supplied to the oil-contaminated part 2 outside the outer perforated pipe 12 through the holes 11.

図７に示すように、油吸着部７５は、目標設置位置に設置された外側有孔管１２の孔１１を外側有孔管１２の内側から覆うように外側有孔管１２の内側に設置される。油吸着部７５は、上述した椴松ファイバーのような油吸着材１３と、被覆材としての例えば円筒状袋１６内に油吸着材１３が収納されて円柱形状に形成された油吸着体１７と、油吸着体１７の円柱の両端部に設けられた端部保持板１８；１９と、油吸着材回収具としての回収ワイヤー２０とを備える。そして、油吸着体１７を横孔２１内経由で油汚染部２の目標設置位置まで押し込むための油吸着体押し込み用棒状パイプ９を用いる。円筒状袋１６は不織布などの多孔質材料により形成された例えば一端閉塞他端開口の円筒状袋を用いる。この円筒状袋１６の他端開口から椴松ファイバーが他円筒状袋１６内に充填収納された後に他円筒状袋１６の他端開口が閉塞されて油吸着体１７が形成される。他方の端部保持板１９は、中央に回収ワイヤー２０の径よりも大きな径の貫通孔３１を備える。   As shown in FIG. 7, the oil adsorbing portion 75 is installed inside the outer perforated pipe 12 so as to cover the hole 11 of the outer perforated pipe 12 installed at the target installation position from the inside of the outer perforated pipe 12. The The oil adsorbing unit 75 includes the oil adsorbing material 13 such as the above-described Jinmatsu fiber, and the oil adsorbing body 17 in which the oil adsorbing material 13 is housed in, for example, a cylindrical bag 16 as a covering material and formed in a columnar shape. , End holding plates 18; 19 provided at both ends of the cylinder of the oil adsorbing body 17, and a collecting wire 20 as an oil adsorbing material collecting tool. Then, an oil adsorbent pushing rod-like pipe 9 for pushing the oil adsorbing body 17 to the target installation position of the oil contaminated part 2 via the horizontal hole 21 is used. As the cylindrical bag 16, for example, a cylindrical bag formed of a porous material such as a nonwoven fabric and having one end closed and the other end opened is used. After the pine fiber is filled and stored in the other cylindrical bag 16 from the other end opening of the cylindrical bag 16, the other end opening of the other cylindrical bag 16 is closed to form the oil adsorbing body 17. The other end holding plate 19 includes a through hole 31 having a diameter larger than the diameter of the recovery wire 20 at the center.

油吸着部７５の作り方の一例を以下に示す。回収ワイヤー２０の一端２４ａが他方の端部保持板１９の貫通孔３１に通された後に、回収ワイヤー２０の一端２４ａが油吸着体１７の他端から一端に向けて油吸着体１７の円柱中心に沿って油吸着体１７中に通される。油吸着体１７の一端より外に突出させた回収ワイヤー２０の一端２４ａと一方の端部保持板１８とが互いに連結される。油吸着体１７の他端と他方の端部保持板１９とが互いに連結される。以上の構成により、油吸着体１７を横孔２１内に設置された外側有孔管１２内に押し込んだ後に油吸着体押し込み用棒状パイプ９を回収ワイヤー２０の他端２５ａから回収ワイヤー２０に通して油吸着体押し込み用棒状パイプ９の一端２２ａを他方の端部保持板１９に突き当てて押して油吸着体１７を油汚染部２の目標設置位置まで押し込むことにより、油吸着体１７を油汚染部２の目標設置位置に設置できる。また、回収ワイヤー２０の他端２５ａ側を引っ張って油汚染部２の油を吸着した油吸着体１７を外側有孔管１２内から地上に引き上げることができる。この場合、油吸着体１７と端部保持板１８；１９と回収ワイヤー２０とが連結されているので、油吸着体１７が外側有孔管１２の内側に残らないように油吸着体１７を回収できる。また、油吸着体１７は、油吸着材１３が不織布のような多孔質材料により形成された円筒状袋１６内に収納されて形成されたので、油吸着体１７が外側有孔管１２内の目標設置位置に設置される場合や油吸着体１７が外側有孔管１２内から地上に引き出される場合に円筒状袋１６が油吸着材１３の損傷を防止するとともに、油汚染部２の油が円筒状袋１６を通過して油吸着材１３に吸着する。   An example of how to make the oil adsorbing portion 75 is shown below. After one end 24a of the recovery wire 20 is passed through the through hole 31 of the other end holding plate 19, the one end 24a of the recovery wire 20 is directed from the other end of the oil adsorber 17 toward the one end. Along the oil adsorbent 17. One end 24a of the recovery wire 20 protruded from one end of the oil adsorbing body 17 and one end holding plate 18 are connected to each other. The other end of the oil adsorbing body 17 and the other end holding plate 19 are connected to each other. With the above configuration, after the oil adsorber 17 is pushed into the outer perforated pipe 12 installed in the lateral hole 21, the oil adsorber pushing rod-shaped pipe 9 is passed through the collection wire 20 from the other end 25 a of the collection wire 20. Then, one end 22a of the rod 9 for pushing the oil adsorbing body is abutted against the other end holding plate 19 and pushed to push the oil adsorbing body 17 to the target installation position of the oil contaminating section 2, whereby the oil adsorbing body 17 is contaminated with oil. It can be installed at the target installation position of part 2. In addition, the oil adsorber 17 that has adsorbed the oil in the oil contaminated portion 2 by pulling the other end 25 a side of the recovery wire 20 can be pulled up from the inside of the outer perforated pipe 12 to the ground. In this case, since the oil adsorber 17, the end holding plate 18; 19 and the recovery wire 20 are connected, the oil adsorber 17 is recovered so that the oil adsorber 17 does not remain inside the outer perforated tube 12. it can. Further, the oil adsorbent 17 is formed by accommodating the oil adsorbent 13 in a cylindrical bag 16 formed of a porous material such as a nonwoven fabric, so that the oil adsorber 17 is contained in the outer perforated tube 12. The cylindrical bag 16 prevents the oil adsorbent 13 from being damaged when installed at the target installation position or when the oil adsorbing body 17 is pulled out from the outer perforated pipe 12 to the ground, and the oil in the oil contaminated part 2 It passes through the cylindrical bag 16 and is adsorbed by the oil adsorbent 13.

回収ワイヤー２０、油吸着体押し込み用棒状パイプ９、連結管６としては、目標設置位置から横孔２１を経由して地上に届くまでの長さＸ（図示せず）以上のものを用いる。これにより、外側有孔管１２や油吸着体１７が目標設置位置に設置された場合、油吸着体押し込み用棒状パイプ９の他端２７、連結管６の他端２８、回収ワイヤー２０の他端２５ａがそれぞれ横孔２１の始端口３０より地上に出る。そして、油吸着体押し込み用棒状パイプ９が地上に引き出されて取り除かれた後に、連結管６の他端２８と吸引装置４の吸引口２３とが互いに繋がれ、吸引装置４が連結管６及び油吸着体１７経由で外側有孔管１２の外側に位置する油汚染部２の油を地下水とともに吸引することによって、地下水が吸引装置４により吸引され、油が油吸着材１３に吸着されることになる。   As the recovery wire 20, the oil adsorbent pushing rod-like pipe 9, and the connecting pipe 6, those having a length X (not shown) or more from the target installation position to reach the ground via the horizontal hole 21 are used. Thereby, when the outer perforated pipe 12 and the oil adsorber 17 are installed at the target installation position, the other end 27 of the rod 9 for pushing the oil adsorbent, the other end 28 of the connecting pipe 6, and the other end of the recovery wire 20 25a exits from the start end 30 of the horizontal hole 21 to the ground. After the oil adsorber pushing rod-shaped pipe 9 is drawn out and removed, the other end 28 of the connection pipe 6 and the suction port 23 of the suction apparatus 4 are connected to each other, and the suction apparatus 4 is connected to the connection pipe 6 and By sucking the oil in the oil-contaminated part 2 located outside the outer perforated pipe 12 through the oil adsorber 17 together with the ground water, the ground water is sucked by the suction device 4 and the oil is adsorbed by the oil adsorbing material 13. become.

浄化装置１を用いて地中油汚染土壌を浄化する方法を説明する。自由曲線掘削機により目標設置位置を通過する横孔２１が形成される。横孔２１内に挿入された外側有孔管１２が目標設置位置に設置される。油吸着部７５が油吸着体１７側から連結管６の他端２８より外側有孔管１２内に挿入されて目標設置位置に設置される。油吸着体押し込み用棒状パイプ９が取り除かれた後、横孔２１の始端口３０より地上に引き出された連結管６の他端２８と吸引装置４の吸引口２３とが互いに繋がれる。そして、吸引装置４が駆動して吸引すると、油吸着体１７の外側に位置する油汚染部２の油が地下水とともに外側有孔管１２の孔１１の方向に吸引されて、地下水が孔１１、油吸着体１７、連結管６を通過して吸引装置４に吸引され、油が孔１１、油吸着体１７の円筒状袋１６を通過して油吸着材１３に吸着される。吸引作業が終了した後、回収ワイヤー２０を引っ張って、油吸着体１７を外側有孔管１２の内側から地上に引き出して、外側有孔管１２の内側から取り除く。   A method for purifying underground oil-contaminated soil using the purification device 1 will be described. A horizontal hole 21 passing through the target installation position is formed by the free curve excavator. The outer perforated tube 12 inserted into the lateral hole 21 is installed at the target installation position. The oil adsorbing part 75 is inserted into the outer perforated pipe 12 from the other end 28 of the connecting pipe 6 from the oil adsorbing body 17 side and installed at the target installation position. After the oil adsorber pushing rod pipe 9 is removed, the other end 28 of the connecting pipe 6 drawn out from the start end 30 of the lateral hole 21 and the suction port 23 of the suction device 4 are connected to each other. Then, when the suction device 4 is driven and sucked, the oil in the oil-contaminated part 2 located outside the oil adsorbing body 17 is sucked in the direction of the hole 11 of the outer perforated pipe 12 together with the ground water, so that the ground water is The oil adsorbing body 17 passes through the connecting pipe 6 and is sucked into the suction device 4, and the oil passes through the hole 11 and the cylindrical bag 16 of the oil adsorbing body 17 and is adsorbed by the oil adsorbing material 13. After the suction operation is finished, the recovery wire 20 is pulled, and the oil adsorbing body 17 is pulled out from the inside of the outer perforated pipe 12 to the ground and removed from the inside of the outer perforated pipe 12.

油吸着体１７を外側有孔管１２内から地上に引き出した後、外側有孔管１２の内側に管装置５０Ａの有孔管５２を設置し、管装置５０Ａを用いて外側有孔管１２内に微生物を供給する。微生物が内側有孔管５２の孔５１及び外側有孔管１２の孔１１を経由して外側有孔管１２の周囲に残存する油に付着して油を分解する。   After the oil adsorbing body 17 is pulled out from the outer perforated pipe 12 to the ground, the perforated pipe 52 of the pipe device 50A is installed inside the outer perforated pipe 12, and the inside of the outer perforated pipe 12 is used using the pipe device 50A. To supply microorganisms. Microorganisms adhere to the oil remaining around the outer perforated pipe 12 via the holes 51 of the inner perforated pipe 52 and the holes 11 of the outer perforated pipe 12, and decompose the oil.

実施形態３によれば、油汚染部２の油が拡散しているような場合でも、吸引装置４による吸引作業によって、油汚染部２の油を外側有孔管１２の内側に設けた油吸着材１３に集中的に吸着させることができるので、油汚染部２の油を効率的に除去できて、地中油汚染土壌を効率的に浄化できる。また、油吸着材１３が被覆材としての円筒状袋１６で覆われたので、油吸着材１３の損傷を防止できる。また、管装置５０Ａを用いたので、微生物供給箇所を特定できるとともに、連結管５３を介した供給により、有孔管５２の外側における各孔５１の近辺に微生物を均等に供給できるようになる。   According to the third embodiment, even when the oil in the oil-contaminated part 2 is diffusing, the oil adsorption in which the oil in the oil-contaminated part 2 is provided inside the outer perforated pipe 12 by the suction operation by the suction device 4. Since it can be made to adsorb | suck to the material 13 intensively, the oil of the oil pollution part 2 can be removed efficiently, and underground oil-contaminated soil can be purified efficiently. Further, since the oil adsorbing material 13 is covered with the cylindrical bag 16 as the covering material, the oil adsorbing material 13 can be prevented from being damaged. In addition, since the pipe device 50A is used, the microorganism supply location can be specified, and supply through the connecting pipe 53 enables the microorganisms to be supplied uniformly to the vicinity of the holes 51 outside the perforated pipe 52.

導管５９を備えない構成の管装置としてもよい。
上記各実施形態では管装置５０Ａを用いた地中油汚染土壌の浄化方法の例を説明したが、管装置５０を用いてもよい。
なお、横孔２１は、地中で掘り止められる孔でもよい。この場合、例えば、駆動軸の先端に設けた切削ビットで地中を掘削して横孔を形成し、途中で駆動軸と切削ビットとを分離して切削ビットを地中に残して駆動軸を引き戻してから、横孔２１内に油吸着処理管３を挿入して設置すればよい。
外側有孔管１２の孔１１を塞ぐように外側有孔管１２の外周面に油吸着材１３を巻き付けたりして取り付けた後に、この油吸着材１３の外面を覆うように、不織布などの多孔質材料により形成された被覆材を取り付けてもよい。 It is good also as a pipe | tube apparatus of the structure which is not provided with the conduit | pipe 59. FIG.
In each of the above embodiments, the example of the purification method of the underground oil-contaminated soil using the pipe device 50A has been described, but the pipe device 50 may be used.
The lateral hole 21 may be a hole that can be dug in the ground. In this case, for example, the ground is excavated by a cutting bit provided at the tip of the driving shaft to form a horizontal hole, and the driving shaft and the cutting bit are separated in the middle, and the cutting bit is left in the ground to drive the driving shaft. After pulling back, the oil adsorption processing tube 3 may be inserted and installed in the horizontal hole 21.
After attaching the oil adsorbing material 13 around the outer peripheral surface of the outer perforated tube 12 so as to close the hole 11 of the outer perforated tube 12, the porous material such as a nonwoven fabric is covered so as to cover the outer surface of the oil adsorbing material 13. You may attach the coating | covering material formed with the quality material.

１ 浄化装置、２ 油汚染部、３ 油吸着処理管、１１ 孔、
１２ 外側有孔管、１３ 油吸着材、５０；５０Ａ 管装置、５１ 孔、
５２ 有孔管、６３ パッカー。 1 purification device, 2 oil contamination section, 3 oil adsorption treatment tube, 11 holes,
12 outer perforated pipe, 13 oil adsorbent, 50; 50A pipe device, 51 holes,
52 perforated tubes, 63 packers.

Claims (3)

管の内周面と外周面とに跨って貫通する孔を備えた外側有孔管と外側有孔管の孔を覆うように外側有孔管の外周面に設けられた油吸着材とを備えた油吸着処理管を地中の油汚染部又は油汚染部の近傍に設置し、油汚染部の油を外側有孔管内経由で吸引することによって油吸着材に油を吸着させた後に、外側有孔管の内側に、管の内周面と外周面とに跨って貫通する孔を複数備えた有孔管と当該有孔管の一方の端部開口を経由して当該有孔管の内側から複数の孔に個々に連結された複数の連結管とを備えた管装置を外側有孔管の軸に沿った方向に移動可能に設置して、油吸着材に吸着された油を分解する微生物を管装置の有孔管内から当該有孔管の孔及び外側有孔管の孔を通して油吸着材に供給したことを特徴とする地中油汚染土壌の浄化方法。   An outer perforated tube having a hole penetrating the inner peripheral surface and the outer peripheral surface of the tube, and an oil adsorbent provided on the outer peripheral surface of the outer perforated tube so as to cover the hole of the outer perforated tube The oil adsorption treatment pipe is installed in the vicinity of the underground oil-contaminated part or the oil-contaminated part, and the oil adsorbent is adsorbed by sucking the oil in the oil-contaminated part through the outer perforated pipe, Inside the perforated pipe, the perforated pipe provided with a plurality of holes penetrating the inner peripheral surface and the outer peripheral surface of the pipe, and the inside of the perforated pipe via one end opening of the perforated pipe A pipe device having a plurality of connecting pipes individually connected to a plurality of holes is movably installed in a direction along the axis of the outer perforated pipe to decompose the oil adsorbed on the oil adsorbing material. A method for purifying soil contaminated with underground oil, characterized in that microorganisms are supplied from the inside of the perforated pipe of the pipe device to the oil adsorbent through the hole of the perforated pipe and the hole of the outer perforated pipe. 管の内周面と外周面とに跨って貫通する孔を備えた外側有孔管を地中の油汚染部又は油汚染部の近傍に設置し、外側有孔管の内側に油吸着材を設置した状態で油汚染部の油を外側有孔管内経由で吸引することによって油吸着材に油を吸着させた後に、油を吸着した油吸着材を地上に取り出し、その後、外側有孔管の内側に、管の内周面と外周面とに跨って貫通する孔を複数備えた有孔管と当該有孔管の一方の端部開口を経由して当該有孔管の内側から複数の孔に個々に連結された複数の連結管とを備えた管装置を外側有孔管の軸に沿った方向に移動可能に設置して、油を分解する微生物を管装置の有孔管経由で外側有孔管内に供給し、外側有孔管の孔を経由して外側有孔管の周囲に微生物を供給したことを特徴とする地中油汚染土壌の浄化方法。   Install an outer perforated pipe with a hole penetrating the inner and outer peripheral surfaces of the pipe in the vicinity of the underground oil-contaminated part or oil-contaminated part, and place an oil adsorbent inside the outer perforated pipe After the oil is adsorbed to the oil adsorbent by sucking the oil in the oil contaminated part through the outer perforated pipe in the installed state, the oil adsorbent adsorbing the oil is taken out to the ground, and then the outer perforated pipe A plurality of holes from the inside of the perforated pipe via a perforated pipe having a plurality of holes penetrating the inner peripheral surface and the outer peripheral surface of the pipe on the inner side and one end opening of the perforated pipe A pipe device having a plurality of connection pipes individually connected to each other is installed so as to be movable in the direction along the axis of the outer perforated pipe, and the microorganisms that decompose oil are placed outside through the perforated pipe of the pipe device. Purification of underground oil-contaminated soil, characterized in that it is supplied into a perforated pipe and microorganisms are supplied around the outer perforated pipe via the hole of the outer perforated pipe . 管装置は、有孔管の両端部の外周面にパッカーを備えたものを用いたことを特徴とする請求項１又は請求項２に記載の地中油汚染土壌の浄化方法。   3. The method for purifying underground oil-contaminated soil according to claim 1 or 2, wherein the pipe device is one having a packer on the outer peripheral surface of both ends of the perforated pipe.
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