JPH058078B2 - - Google Patents
Info
- Publication number
- JPH058078B2 JPH058078B2 JP60091380A JP9138085A JPH058078B2 JP H058078 B2 JPH058078 B2 JP H058078B2 JP 60091380 A JP60091380 A JP 60091380A JP 9138085 A JP9138085 A JP 9138085A JP H058078 B2 JPH058078 B2 JP H058078B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- soil
- target soil
- treatment agent
- pipe
- 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
- 239000002689 soil Substances 0.000 claims description 66
- 239000003795 chemical substances by application Substances 0.000 claims description 52
- 238000011282 treatment Methods 0.000 claims description 44
- 239000007924 injection Substances 0.000 claims description 30
- 238000002347 injection Methods 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 11
- 238000011065 in-situ storage Methods 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 5
- 239000000383 hazardous chemical Substances 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 231100001261 hazardous Toxicity 0.000 claims 1
- 238000010276 construction Methods 0.000 description 12
- 238000005086 pumping Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000003756 stirring Methods 0.000 description 7
- 238000011221 initial treatment Methods 0.000 description 6
- 229910001385 heavy metal Inorganic materials 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- -1 conventionally Inorganic materials 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000001784 detoxification Methods 0.000 description 1
- VDQVEACBQKUUSU-UHFFFAOYSA-M disodium;sulfanide Chemical compound [Na+].[Na+].[SH-] VDQVEACBQKUUSU-UHFFFAOYSA-M 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Processing Of Solid Wastes (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、重金属類、その他有害物質によつて
汚染された土壌を原位置に於いてそれに適応する
処理剤を土砂中に噴射し、該処理剤を対象土壌と
攪拌混合して、有害物質を不溶化する有害物質汚
染土壌の原位置処理工法に関するものである。Detailed Description of the Invention (Field of Industrial Application) The present invention is a method of treating soil contaminated with heavy metals and other harmful substances by injecting a treatment agent suitable for the soil into the soil in situ. This invention relates to an in-situ treatment method for soil contaminated with hazardous substances, in which a treatment agent is stirred and mixed with the target soil to insolubilize the hazardous substances.
（従来の技術）
重金属類の有害物質によつて汚染された土壌の
無害化処理を行なう場合、従来一般に汚染土壌周
辺の地下水の移動防止及び土留のために、その周
辺に鋼矢板等を打設してその内部をバツクホウ等
で掘削し、地面に仮り置きした土砂に処理剤を散
布した後バツクホウ等で混合攪拌している。そし
て、発生する地下水を揚水し、水処理装置によつ
て水中の重金属を不溶化沈殿させ、水質基準に合
致した水を外部へ放流していた。(Prior art) When detoxifying soil contaminated with hazardous substances such as heavy metals, conventionally, steel sheet piles, etc., were driven around the contaminated soil in order to prevent the movement of groundwater around the contaminated soil and to retain the earth. Then, the inside is excavated with a backhoe, etc., and the treatment agent is sprinkled on the earth and sand temporarily placed on the ground, and then mixed and stirred with a backhoe or the like. The generated groundwater was then pumped up, heavy metals in the water were insolubilized and precipitated using water treatment equipment, and water that met water quality standards was discharged to the outside.
（発明が解決しようとする問題点）
しかしながら前記従来の工法では、汚染土壌周
辺に対する鋼矢板の打設、支保工設置、水処理装
置等多くの資材が必要で手数がかかり、また掘削
土砂類の仮置場（混合ヤード）等、広い作業用面
積が要求され、然も工期が長く経費がかかるとい
う問題点があつた。(Problems to be Solved by the Invention) However, the conventional construction method described above requires many materials such as driving steel sheet piles around contaminated soil, installing shoring, and water treatment equipment, and is time-consuming. The problem was that a large working area was required, such as a temporary storage area (mixed yard), and the construction period was long and the cost was high.
（問題点を解決するための手段）
本発明は、有害物質により汚染された土壌の無
害化処理を行うに当たり、単一流路または複数流
路を有する中空管の先端にビツトを取付けると共
に、前記中空管の先端近傍に単一または複数の噴
射口を設けて形成された圧送管をボーリング機械
に取付けて圧送管自体で穿孔して対象土壌に達せ
しめ、または予めボーリング機械でボーリングロ
ツドを介して穿孔した孔を利用して対象土壌まで
圧送管を挿入せしめ、然る後圧送管の前進または
後退時に処理剤を粉体またはスラリー状あるいは
溶液状で対象土壌に噴射口より噴射し、該噴射圧
により対象土壌を切削、弛緩せしめると共に、前
記処理剤の噴射圧により、該処理剤と前記切削、
弛緩せしめた対象土壌とを攪拌混合させるという
手段を採用することにより、上記問題点を解決し
た。(Means for Solving the Problems) The present invention provides a method for detoxifying soil contaminated with harmful substances by attaching a bit to the tip of a hollow tube having a single flow path or multiple flow paths, and A pressure feed pipe formed by providing a single or multiple injection ports near the tip of a hollow pipe is attached to a boring machine and the pressure pipe itself is used to drill holes to reach the target soil, or a boring rod is pre-installed with a boring machine. A pressure-feeding pipe is inserted into the target soil using a hole drilled through the hole, and then, when the pressure-feeding pipe advances or retreats, a treatment agent is injected into the target soil in the form of a powder, slurry, or solution from an injection port. The injection pressure cuts and loosens the target soil, and the injection pressure of the treatment agent removes the treatment agent and the cutting,
The above problem was solved by adopting a method of stirring and mixing the loosened target soil.
（作用）
上記工法より成る本発明工法の作用は次の通り
である。(Function) The function of the construction method of the present invention comprising the above construction method is as follows.
対象土壌に対して、ボーリング機械に取付けた
圧送管自体で穿孔し、または予め穿孔した孔に圧
送管を挿入し、圧送管の前進または後退時に圧送
管に設けられた噴射口より、処理剤を粉体または
スラリー状あるいは溶液状で対象土壌に噴射し、
該噴射圧により対象土壌を切削、弛緩せしめると
共に、前記処理剤の噴射圧により、該処理剤と前
記切削、弛緩せしめた対象土壌とを攪拌混合する
ことにより原位置に於いて汚染土壌中の有害物質
を不溶化する。 The target soil is drilled with the pressure feed pipe itself attached to a boring machine, or the pressure feed pipe is inserted into a pre-drilled hole, and the treatment agent is applied from the injection port provided in the pressure feed pipe as the pressure feed pipe advances or retreats. Inject it into the target soil in powder, slurry or solution form,
The injection pressure cuts and loosens the target soil, and the injection pressure of the treatment agent stirs and mixes the treatment agent with the cut and loosened target soil, thereby eliminating harmful substances in the contaminated soil in situ. Insolubilize substances.
（実施例）
本発明工法の実施例を図に就いて詳細に説明す
るに、本発明工法は汚染土壌の無害化処理をなす
対象土壌に圧送管１を圧入してこれに送給された
処理剤を噴射口２より対象土壌に噴射して、これ
と攪拌混合して有害物質を不溶化するものである
が、前記圧送管１は単一の処理剤を圧送する単一
流路を有する圧送管１ａと、複数の処理剤を夫々
の流路により同時に、または別々に圧送する複数
流路を有する圧送管１ｂとに分けられる。(Example) An example of the method of the present invention will be described in detail with reference to the drawings.The method of the present invention is a method in which a pressure feed pipe 1 is press-fitted into the soil to be treated to detoxify contaminated soil. The agent is injected into the target soil from the injection port 2 and stirred and mixed with the soil to insolubilize harmful substances. and a pressure-feeding pipe 1b having a plurality of channels for pumping a plurality of processing agents simultaneously or separately through respective channels.
単一流路を有する圧送管１を使用する工法を第
１実施例として説明すると、先ず処理剤を対象土
壌に圧送する圧送管１ａは、第２図に示すように
単一の流路となる中空部３を有する中空管４の先
端に土壌の穿孔が可能なるようにビツト５を取付
け、且つ中空管４の先端近傍の周壁に１個または
複数個の噴射口２ａを設けると共に、ビツト５と
噴射口２ａの間の中空管４の内周壁に穿孔水を通
過せしめる小孔６を穿設したスプール保持板７を
固定し、且つ該スプール保持板７の上部中央に突
設された突起８に押しばね９の下端部を嵌挿固定
し、更に中空管４の内周壁に摺接して前記噴射口
２ａを遮蔽する環状周壁１０を有し、且該環状周
壁１０の下方部に段部１１を設けて小径の環状突
起１２を垂設して形成されたスプール１３の環状
突起１２に押しばね９の上方部を固定してスプー
ル１３に上方への弾発力を付与せしめて構成され
ている。 To explain the construction method using a pressure feed pipe 1 having a single flow path as a first embodiment, first, the pressure feed pipe 1a that pressure feeds the treatment agent to the target soil is a hollow pipe that forms a single flow path as shown in Fig. 2. A bit 5 is attached to the tip of the hollow tube 4 having the section 3 so as to be able to perforate the soil, and one or more injection ports 2a are provided on the peripheral wall near the tip of the hollow tube 4. A spool holding plate 7 having a small hole 6 formed therein through which water passes is fixed to the inner peripheral wall of the hollow tube 4 between the injection port 2a and the injection port 2a, and a protrusion protruding from the center of the upper part of the spool holding plate 7. The lower end of the push spring 9 is fitted into and fixed to the hollow tube 4, and further has an annular circumferential wall 10 that slides into contact with the inner circumferential wall of the hollow tube 4 to shield the injection port 2a, and a step is provided at the lower part of the annular circumferential wall 10. The upper part of the push spring 9 is fixed to the annular protrusion 12 of the spool 13, which is formed by providing a portion 11 and a small-diameter annular protrusion 12 hanging therefrom, thereby imparting an upward elastic force to the spool 13. ing.
上記のように構成された圧送管１ａをボーリン
グ機械１４の保持部１５に軸支し、且つ圧送管１
ａの上端にスイベル１６の一端を連結すると共
に、該スイベル１６の他端に処理剤を送給するホ
ースまたはパイプ１７の一端を連結し、且該ホー
スまたはパイプ１７の他端は粉体またはスラリー
状あるいは溶液状の処理剤を圧送管１ａへ圧送す
べく圧送ポツトまたは高圧ポンプ等の圧送手段１
８に連結されており、更に圧送手段１８を処理剤
を貯蔵した処理剤タンク１９に連結して、第１実
施例に使用される処理装置を構成する。 The pressure feed pipe 1a configured as described above is pivotally supported on the holding part 15 of the boring machine 14, and the pressure feed pipe 1a is
One end of a swivel 16 is connected to the upper end of a, and one end of a hose or pipe 17 for feeding a processing agent is connected to the other end of the swivel 16. A pressure-feeding means 1 such as a pressure-feeding pot or a high-pressure pump is used to forcefully feed a processing agent in the form of a liquid or a solution to the pressure-feeding pipe 1a.
8, and the pressure feeding means 18 is further connected to a processing agent tank 19 storing a processing agent to constitute the processing apparatus used in the first embodiment.
上記のように構成された処理装置を使用する本
発明工法の第１実施例について説明すると、先ず
第１図に示すように化学工場跡地または鉱山地帯
等の汚染土壌の無害化処理をなす対象土壌の地面
上に処理装置を配置し、次ぎにホースまたはパイ
プ１７を通して給水しながら穿孔水を中空管４、
スプール１３の環状周壁１０内、環状突起１２
内、小孔６を経てビツト５部分へ送り、圧送管１
ａをボーリング機械１４により回転しながら前進
させて、対象土壌の処理を施す計画深度まで穿孔
する。そして、第３図に示すように圧送管１ａを
後退させながら、或いは前進、後退を繰返しなが
ら処理剤を圧送手段１８を介してホースまたはパ
イプ１７を通し送給量を増して圧送管１ａの中空
部３及びスプール１３に圧送すると、中空部３の
内圧が上昇し、処理剤がスプール１３を押圧し、
遂にはその押圧力により押しばね９に抗してスプ
ール１３が中空管４の内壁面に摺接しながら下降
し、それにより噴射口２ａが開口して、これより
処理剤を周囲の対象土壌に対して略水平状態で噴
射して、該噴射圧を利用して前記対象土壌を切
削、弛緩せしめると共に、前記処理剤の噴射圧に
より、該処理剤と前記切削、弛緩せしめた対象土
壌とを攪拌混合せしめて対象土壌中の重金属類を
不溶化するのである。 To explain the first embodiment of the construction method of the present invention using the processing equipment configured as described above, first, as shown in Fig. 1, the target soil to be treated to detoxify contaminated soil such as a former chemical factory site or a mining area. The treatment equipment is placed on the ground of
Inside the annular peripheral wall 10 of the spool 13, annular protrusion 12
The inside is fed to the bit 5 part through the small hole 6, and the pressure feed pipe 1
A is moved forward while rotating by the boring machine 14, and a hole is bored to the planned depth at which the target soil is to be treated. Then, as shown in FIG. 3, the processing agent is passed through the hose or pipe 17 through the pressure-feeding means 18 while retracting the pressure-feeding tube 1a, or by repeatedly moving forward and backward, increasing the amount of the treatment agent being fed into the hollow of the pressure-feeding tube 1a. When the processing agent is pumped to the section 3 and the spool 13, the internal pressure of the hollow section 3 increases, and the processing agent presses the spool 13,
Finally, due to the pressing force, the spool 13 descends against the push spring 9 while slidingly contacting the inner wall surface of the hollow tube 4, thereby opening the injection port 2a and spraying the treatment agent into the surrounding target soil. The treatment agent is sprayed in a substantially horizontal state, and the injection pressure is used to cut and loosen the target soil, and the injection pressure of the treatment agent stirs the treatment agent and the cut and loosened target soil. By mixing, the heavy metals in the target soil are insolubilized.
なお、強度増加や、止水等を目的とする地盤改
良技術の分野では噴射とは、高圧噴射を意味し、
低圧で噴射する場合は吐出という言葉を用いるも
のが一般的である。そして、高圧噴射は高いエネ
ルギーを持つ高速の液体流または粉体流により土
壌を切削、破砕、あるいは崩落、弛緩せしめるこ
とを目的としており、次いで、あるいはそれと同
時に硬化性材料（固結材）を注入、または攪拌混
合して、土を硬化安定化させることを最終目的と
するものであり、本願発明にいう噴射も前記同様
高圧噴射を意味している。 In addition, in the field of ground improvement technology for the purpose of increasing strength or stopping water, injection refers to high-pressure injection.
When injecting at low pressure, the term "discharge" is generally used. The purpose of high-pressure jetting is to cut, crush, collapse, or loosen the soil with a high-energy, high-velocity liquid or powder stream, and then, or at the same time, inject a hardening material (consolidation material). The final purpose is to harden and stabilize the soil by stirring or mixing, and the injection referred to in the present invention also means high-pressure injection as described above.
前記処理剤の噴射による対象土壌との攪拌混合
によつて、処理剤が対象土壌中に一様に放出され
て、バツクホウで攪拌混合されたものと同等また
は同等以上の効果がある。更に、処理剤の対象土
壌への噴射を第４図に示すように圧送管１ａをボ
ーリング機械１４により回転後退させながら、或
いは前進、後退を繰返しながら下部より上部へと
有害物質を順次不溶化させる。この場合、噴射口
２ａより噴射された処理剤が対象土壌と攪拌混合
される範囲は、その直径が30〜100cm程度である
ために、広範囲の土壌に対しては第５図に示すよ
うに数個所に亘つて順次作業を行なうようにす
る。 By agitating and mixing the treatment agent with the target soil by spraying it, the treatment agent is uniformly released into the target soil, and the effect is equal to or greater than that obtained by stirring and mixing with a backhoe. Furthermore, as shown in FIG. 4, the treatment agent is injected onto the target soil while the pressure feeding pipe 1a is rotated and retracted by the boring machine 14, or by repeating forward and backward movement, in order to sequentially insolubilize harmful substances from the lower part to the upper part. In this case, the area where the treatment agent injected from the injection port 2a is stirred and mixed with the target soil has a diameter of about 30 to 100 cm, so for a wide range of soil, there are several Try to work on each part in sequence.
なお、上記のものは圧送管１ａにビツト５とい
う穿孔手段を備えさせて、１本の圧送管１ａに穿
孔と処理剤の圧送という機能を持たせているが、
ボーリング機械１４でボーリングロツドを介して
予め計画深度まで穿孔し、然る後前記圧送管１ａ
をボーリング機械１４に装着して挿入し、圧送管
１ａの前進或いは後退時に於いて処理剤を対象土
壌に噴射攪拌してもよい。 In addition, in the above-mentioned method, the pressure feed pipe 1a is equipped with a perforation means called bit 5, so that one pressure feed pipe 1a has the functions of perforation and pressure feeding of the processing agent.
A boring machine 14 drills a hole to a planned depth via a boring rod, and then the pressure feeding pipe 1a is
may be installed and inserted into the boring machine 14, and the treatment agent may be injected and stirred into the target soil when the pressure feed pipe 1a moves forward or backward.
次ぎに、複数流路を有する圧送管１を使用する
工法を第２実施例として説明すると、先ず複数の
処理剤を同時に、または別々に対象土壌に圧送す
る圧送管１ｂは、第７図に示すように前記単一流
路を有する圧送管１ａと同一機能を外管２０の先
端に備えさせて下部圧送部２１を形成し、且該下
部圧送部２１のスプール１３より上方の外管２０
の周壁に噴射口２ｂを設け、更に外管２０に底壁
２２を有する１つの流路となる内管２３を嵌挿し
て、前記噴射口２ｂと同一面の内管２３の周壁に
透孔２４を穿設し、且該透孔２４と噴射口２ｂと
を連結管２５で連結すると共に、底壁２２に押し
ばね２６の下端部を固定し、更に内管２３の内周
壁に摺接して前記透孔２４を遮蔽する遮蔽体２７
の下部に小径の突起２８を垂設して形成された内
管用スプール２９の突起２８に押しばね２６の上
端部を嵌挿固定して内管用スプール２９に上方へ
の弾発力を付与せしめて上部圧送部３０を形成す
ることにより構成されている。なお、第７図に於
いては２個の噴射口２ａ，２ｂを有するが、想像
線で示すように上部圧送部３０の内管２３内に更
に内管２３ａを嵌挿してこの内管２３ａ内に上部
圧送部３０と同一構成の上部圧送部３０ａを装置
して行くことによつて上部圧送部を複数個有する
圧送管１ｂを設けることができる。 Next, a construction method using a pressure feed pipe 1 having multiple flow paths will be described as a second embodiment. First, a pressure feed pipe 1b that pressure feeds a plurality of treatment agents to the target soil simultaneously or separately is shown in FIG. As shown in FIG.
An injection port 2b is provided on the peripheral wall of the outer tube 20, and an inner tube 23 having a bottom wall 22 and forming one flow path is fitted into the outer tube 20, and a through hole 24 is formed in the peripheral wall of the inner tube 23 on the same surface as the injection port 2b. The through hole 24 and the injection port 2b are connected to each other by a connecting pipe 25, and the lower end of a pressure spring 26 is fixed to the bottom wall 22. A shielding body 27 that shields the through hole 24
The upper end of the push spring 26 is fitted and fixed into the projection 28 of the inner pipe spool 29, which is formed by vertically disposing a small diameter projection 28 at the lower part of the inner pipe spool 29, thereby imparting an upward elastic force to the inner pipe spool 29. It is configured by forming an upper pumping section 30. Although there are two injection ports 2a and 2b in FIG. 7, an inner tube 23a is further fitted into the inner tube 23 of the upper pressure feeding section 30 as shown by the imaginary line. By installing an upper pressure-feeding section 30a having the same configuration as the upper pressure-feeding section 30, it is possible to provide a pressure-feeding pipe 1b having a plurality of upper pressure-feeding sections.
上記のように構成された圧送管１ｂをボーリン
グ機械１４の保持部１５に軸支し、且圧送管１ｂ
の上端に二液圧送用のスイベル１６の一端を連結
すると共に、該スイベル１６の他端に外管２０及
び内管２３に夫々別個の処理剤を送給する２本の
ホースまたはパイプ１７の一端を上記スイベル１
６に連結し、且つ該各ホースまたはパイプ１７の
他端は粉体またはスラリー状あるいは溶液状の処
理剤を圧送管１ｂへ圧送すべく各圧送手段１８に
連結され、更に各圧送手段１８を各処理剤タンク
１９に連結して第２実施例に使用する処理装置を
構成する。 The pressure feed pipe 1b configured as described above is pivotally supported on the holding part 15 of the boring machine 14, and the pressure feed pipe 1b
One end of two hoses or pipes 17 is connected to the upper end of a swivel 16 for pressure feeding two liquids, and the other end of the swivel 16 is connected to one end of two hoses or pipes 17 for feeding separate processing agents to the outer tube 20 and the inner tube 23, respectively. The above swivel 1
6, and the other end of each hose or pipe 17 is connected to each pumping means 18 for pumping powder, slurry or solution treatment agent to the pumping pipe 1b, and further connects each pumping means 18 to each pumping means 1b. It is connected to the processing agent tank 19 to constitute a processing device used in the second embodiment.
上記のように構成された処理装置を使用する本
発明工法の第２実施例について説明すると、先ず
第６図に示すように化学工場跡地または鉱山地帯
等の汚染土壌の無害化処理をなす対象土壌の地面
上に処理装置を配置し、次ぎに第１実施例と同様
に下部圧送部２１より穿孔水を送り、圧送管１ｂ
をボーリング機械１４により前進させて、対象土
壌の処理を施す計画深度まで穿孔する。そして、
第１実施例と同様に圧送管１ｂを後退させなが
ら、或いは前進の後後退しながら、各処理剤を各
圧送手段１８を介して各ホースまたはパイプ１７
及び夫々の流路である外管２０、内管２３を通し
て圧送管１ｂの上部圧送部３０及び下部圧送部２
１に夫々同時に、または夫々個別に圧送する。上
部圧送部３０の内管２３へ圧送した処理剤は内管
用スプール２９を押圧し、遂にはその押圧力によ
り押しばね２６に抗して内管用スプール２９が内
管２３の内壁面に摺接して下降し、それにより透
孔２４が開口して、これより処理剤を噴射口２ｂ
を介して周囲の対象土壌に対して略水平状態で噴
射して、対象土壌と処理剤とを攪拌混合し、更に
下部圧送部２１からも前記第１実施例で説明した
ように噴射口２ａより処理剤が噴射され、対象土
壌と処理剤とを攪拌混合して対象土壌中の重金属
類を不溶化するのである。その他の作用は前記第
１実施例に述べたものと同一である。 To explain the second embodiment of the construction method of the present invention using the treatment equipment configured as described above, first, as shown in Fig. 6, the target soil is subjected to detoxification treatment of contaminated soil such as a former chemical factory site or a mining area. Next, as in the first embodiment, drilling water is sent from the lower pressure feeding section 21 to the pressure feeding pipe 1b.
is advanced by the boring machine 14, and the hole is bored to the planned depth for treatment of the target soil. and,
As in the first embodiment, each treatment agent is delivered to each hose or pipe 17 through each pressure-feeding means 18 while moving the pressure-feeding pipe 1b backward, or while moving forward and then retreating.
The upper pressure-feeding section 30 and the lower pressure-feeding section 2 of the pressure-feeding pipe 1b are passed through the outer tube 20 and inner tube 23, which are the respective flow paths.
1 simultaneously or individually. The processing agent force-fed to the inner tube 23 of the upper pressure-feeding section 30 presses the inner tube spool 29, and finally, due to the pressing force, the inner tube spool 29 slides against the inner wall surface of the inner tube 23 against the pressing spring 26. As a result, the through hole 24 opens and the processing agent is sprayed from the injection port 2b.
The treatment agent is injected into the surrounding target soil in a substantially horizontal state through the agitator to stir and mix the target soil and the treatment agent. A treatment agent is injected, and the target soil and treatment agent are stirred and mixed to insolubilize the heavy metals in the target soil. Other functions are the same as those described in the first embodiment.
この第２実施例が有効である例を示すと、水銀
（Hg）のように硫化ソーダ（Na2Ｓ）による一次
処理のみでは錯体を形成して再溶出し易い汚染物
質の場合、硫酸第１鉄（FeSO4）のように二次処
理剤を一次処理後加える必要がある。 To give an example in which this second embodiment is effective, in the case of a pollutant such as mercury (Hg), which forms a complex and is easily re-eluted by primary treatment with sodium sulfide (Na 2 S), sulfuric acid A secondary treatment agent such as iron (FeSO 4 ) must be added after the primary treatment.
次に、溶出水銀の不溶化処理の化学反応面での
処理過程を示す。 Next, the chemical reaction process for insolubilizing eluted mercury will be described.
Hg2+＋S2-→HgS 硫化ソーダを過剰量添加すると、 HgS＋S2-→HgS2- 2（錯体） となる。 Hg 2+ +S 2- →HgS When an excessive amount of sodium sulfide is added, HgS+S 2- →HgS 2- 2 (complex) is formed.
HgS2- 2＋Fe2+→HgS＋FeS
すなわち、一次処理、二次処理を圧送管１ｂの
後退時に同時に行う場合、上部圧送部３０より一
次処理剤を、下部圧送部２１より二次処理剤を
夫々噴射する。また、土壌条件が例えば軟弱な場
合圧送管１ｂの前進時に一次処理を、後退時に二
次処理を行うことも可能で、前記圧送管１ａによ
つて前進と後退の切り換え時に一次処理剤と二次
処理剤を切り換えることによつて対処するか、或
いは圧送管１ｂを用いて下部圧送管２１より一次
処理剤を後退時に、上部圧送部３０より二次処理
剤を圧送する。 HgS 2- 2 +Fe 2+ →HgS+FeS In other words, when primary treatment and secondary treatment are performed simultaneously when the pressure feeding pipe 1b is retreated, the primary treatment agent is injected from the upper pressure feeding section 30 and the secondary treatment agent is injected from the lower pressure feeding section 21, respectively. do. In addition, if the soil condition is soft, for example, it is possible to perform primary treatment when the pressure feed pipe 1b moves forward, and perform secondary treatment when it retreats. This can be dealt with by switching the processing agent, or the secondary processing agent is pumped from the upper pumping section 30 when the primary processing agent is retreated from the lower pumping pipe 21 using the pumping pipe 1b.
更には、土壌条件が、例えば比較的硬い砂質土
壌等に於いては対象土壌の最深部まで穿孔し、圧
送管１ｂを後退しながら一次処理をなし、最浅部
に達したときに二次処理剤を圧送管１ｂを前進し
ながら圧送することが推奨される。 Furthermore, if the soil conditions are relatively hard, such as sandy soil, the hole is drilled to the deepest part of the target soil, the primary treatment is performed while retreating through the pressure feed pipe 1b, and the secondary treatment is performed when the shallowest part is reached. It is recommended to force-feed the processing agent while moving it forward through the pressure-feeding pipe 1b.
また更に、第８図は対象土壌が比較的深度の深
い場所にある場合についての本発明工法の第３実
施例を示すものである。以下第３実施例について
説明すると、対象土壌が地表より深い場所にある
場合は、特に限定する必要はないが、好ましくは
直径が３〜5m位の作業用立坑３１を夫々所定間
隔、例えば60m間隔で２個計画深度まで掘削し、
且該各作業用立坑３１の底面上に夫々前記第１、
第２実施例の処理装置のいずれかを設置し、圧送
管１を前記第１、第２実施例の場合とは異なり横
方向に位置せしめて、夫々対面する作業用立坑３
１へ両方向から穿孔して行き、両者の中間部分で
突き合せるようにし、然る後前記第１、第２実施
例の場合と同様の作業により有害物質の無害化処
理をなすのである。 Furthermore, FIG. 8 shows a third embodiment of the construction method of the present invention in a case where the target soil is located at a relatively deep location. The third embodiment will be described below. When the target soil is located deep below the ground surface, the working shafts 31 preferably have a diameter of about 3 to 5 m and are arranged at predetermined intervals, for example, at intervals of 60 m, although there is no particular limitation. excavate two holes to the planned depth,
Further, on the bottom surface of each working shaft 31, the first,
One of the processing apparatuses of the second embodiment is installed, and the pressure feed pipe 1 is positioned laterally unlike in the first and second embodiments, and the working shafts 3 face each other.
1 from both directions, and the two are brought into abutment at the middle portion, and then the harmful substances are rendered harmless by the same operation as in the first and second embodiments.
（発明の効果）
以上のように、本発明工法によれば汚染土壌の
無害化処理に当り、対象土壌の土砂を掘削移動さ
せることなく、原位置に於いてボーリング機械に
軸支された圧送管に設けられた噴射口より所定範
囲の対象土壌に処理剤を噴射し、対象土壌と攪拌
混合するだけで有害物質を不溶化することができ
るので、従来のように多くの資材や手数を要せ
ず、然も工期を短縮することができると共に、工
費も節減することができ、また作業用面積がほと
んど必要でない等、優れた効果を奏するものであ
る。(Effects of the Invention) As described above, according to the method of the present invention, when detoxifying contaminated soil, a pressure feed pipe supported by a boring machine in situ can be used without excavating and moving the earth and sand in the target soil. Harmful substances can be insolubilized by simply injecting the treatment agent onto the target soil in a predetermined range from the injection port installed in the machine and stirring and mixing it with the target soil, so there is no need for many materials or labor as in the past. However, the construction period can be shortened, construction costs can also be reduced, and almost no working area is required, resulting in excellent effects.
第１図は本発明工法の第１実施例に使用する処
理装置の概略図、第２図は同第１実施例に使用す
る単一流路を有する圧送管の縦断面図、第３図乃
至第５図は同第１実施例の工程を説明する説明
図、第６図は本発明工法の第２実施例の使用する
処理装置の概略説明図、第７図は同第２実施例に
使用する複数流路を有する圧送管の縦断面図、第
８図は本発明工法の第３実施例を示す概略説明図
である。
図中、１，１ａ，１ｂは圧送管、２，２ａ，２
ｂは噴射口、４は中空管、５はビツト、１４はボ
ーリング機械である。
Fig. 1 is a schematic diagram of the processing equipment used in the first embodiment of the method of the present invention, Fig. 2 is a longitudinal sectional view of a pressure feed pipe having a single flow path used in the first embodiment, and Figs. Figure 5 is an explanatory diagram explaining the steps of the first embodiment, Figure 6 is a schematic diagram of the processing equipment used in the second embodiment of the method of the present invention, and Figure 7 is used in the second embodiment. FIG. 8 is a longitudinal sectional view of a pressure feeding pipe having a plurality of channels, and is a schematic explanatory diagram showing a third embodiment of the construction method of the present invention. In the figure, 1, 1a, 1b are pressure feeding pipes, 2, 2a, 2
b is an injection port, 4 is a hollow tube, 5 is a bit, and 14 is a boring machine.
Claims (1)
を行うに当たり、単一流路または複数流路を有す
る中空管の先端にビツトを取付けると共に、前記
中空管の先端近傍に単一または複数の噴射口を設
けて形成された圧送管をボーリング機械に取付け
て圧送管自体で穿孔して対象土壌に達せしめ、ま
たは予めボーリング機械でボーリングロツドを介
して穿孔した孔を利用して対象土壌まで圧送管を
挿入せしめ、然る後圧送管の前進または後退時に
処理剤を粉体またはスラリー状あるいは溶液状で
対象土壌に噴射口より噴射し、該噴射圧により対
象土壌を切削、弛緩せしめると共に、前記処理剤
の噴射圧により、該処理剤と前記切削、弛緩せし
めた対象土壌とを攪拌混合させることによつて原
位置において有害物質を不溶化することを特徴と
する有害物質汚染土壌の原位置処理工法。1. When detoxifying soil contaminated with harmful substances, a bit is attached to the tip of a hollow tube having a single flow path or multiple flow paths, and a single or multiple jets are installed near the tip of the hollow tube. The pressure feed pipe formed with a mouth is attached to a boring machine and the pressure feed pipe itself makes a hole to reach the target soil, or the hole drilled in advance by the boring machine via a boring rod is used to force feed to the target soil. After inserting the pipe, when the pressure feeding pipe advances or retreats, a treatment agent is injected into the target soil in powder, slurry or solution form from the injection port, and the target soil is cut and loosened by the injection pressure, and the A method for in-situ treatment of hazardous substance-contaminated soil, characterized in that hazardous substances are insolubilized in situ by agitating and mixing the treatment agent and the cut and loosened target soil using the injection pressure of the treatment agent. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60091380A JPS61249587A (en) | 1985-04-27 | 1985-04-27 | Treatment of harmful substance-contaminated soil at home position |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60091380A JPS61249587A (en) | 1985-04-27 | 1985-04-27 | Treatment of harmful substance-contaminated soil at home position |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61249587A JPS61249587A (en) | 1986-11-06 |
| JPH058078B2 true JPH058078B2 (en) | 1993-02-01 |
Family
ID=14024762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60091380A Granted JPS61249587A (en) | 1985-04-27 | 1985-04-27 | Treatment of harmful substance-contaminated soil at home position |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61249587A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009114685A (en) * | 2007-11-05 | 2009-05-28 | Eiji Imai | Underground buried object floatation preventing method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH105737A (en) * | 1996-06-26 | 1998-01-13 | Taisei Corp | Method for execution of soil remediation and device therefor |
| JP4530824B2 (en) * | 2004-12-03 | 2010-08-25 | 株式会社間組 | Soil purification agent and soil purification method |
| JP4726635B2 (en) * | 2006-01-18 | 2011-07-20 | 東邦瓦斯株式会社 | Sparging well and soil purification system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5716852A (en) * | 1980-07-02 | 1982-01-28 | Kuraray Co Ltd | Nitrile derivative, its preparation, and fibrosis suppressing agent containing the same |
-
1985
- 1985-04-27 JP JP60091380A patent/JPS61249587A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5716852A (en) * | 1980-07-02 | 1982-01-28 | Kuraray Co Ltd | Nitrile derivative, its preparation, and fibrosis suppressing agent containing the same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009114685A (en) * | 2007-11-05 | 2009-05-28 | Eiji Imai | Underground buried object floatation preventing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61249587A (en) | 1986-11-06 |
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