JP5341406B2 - Purification well and purification method for contaminated soil. - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaning well and a cleaning method of contaminated soil, wherein contaminated soil is efficiently cleaned. <P>SOLUTION: A water pickup and injection well 130 which allows a chemical of facilitating the movement of a contaminant to permeate the contaminated soil 16 and can perform both of a pumping operation and an injection operation between an injection well 110 and a pumping well 120 is disposed and, thereby, even when an interval between the injection well 110 and the pumping well 120 is large, that is, an area to be cleaned is wide, the contaminant is efficiently removed from the contaminated soil. As the result, the contaminated soil is efficiently cleaned. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a purification well and a purification method for contaminated soil.

  There is known a purification method for purifying contaminated soil by injecting biostimulation agents and oxidants represented by hydrogen peroxide into contaminated soil and detoxifying them in situ.

  For example, Patent Document 1 proposes a method for purifying contaminated soil in which an air-water system in which air is dissolved at a pressure higher than the groundwater pressure is replaced with groundwater below the groundwater surface. Patent Document 2 proposes a contaminated soil purification system including a linear purification functional layer arranged so as not to interfere with a structure from obliquely above the soil to be purified.

Alternatively, Patent Document 3 proposes a purification method in which an injection well and a suction well are provided at an interval so that a heating fluid is injected from the injection well while a contaminant is sucked and collected from the suction well. .
JP 2001-193048 A JP 2005-185981 A JP 2004-243229 A

  Here, it takes time for the drug to diffuse throughout the contaminated soil, and as a result, it may take time for the drug and the pollutant to react and be rendered harmless. In addition, drug diffusion may be non-uniform and contaminants may not be sufficiently purified. As an example of these solutions, a configuration in which a plurality of wells are provided with a close interval is conceivable. However, such a configuration increases the purification cost. Therefore, it is required to efficiently purify contaminated soil.

  The present invention has been made to solve the above problems, and an object thereof is to efficiently purify contaminated soil.

The invention according to claim 1 is a purification well for pumping ground water containing pollutants whose movement has been promoted by the drug by allowing the drug to penetrate into the contaminated soil immediately under the existing building, and has an injection pipe and a pump pipe. And an injection operation for injecting a chemical that promotes the movement of the substance from the injection pipe to infiltrate the contaminated soil, and a pumping operation for pumping the groundwater containing the pollutant whose movement is promoted by the chemical from the pumping pipe . A pumping and injection well capable of performing both simultaneously, an injection well capable of performing at least the injection operation, and a pumping well provided apart from the injection well and capable of performing at least the pumping operation The injection well and the pumping well are provided on one side and the other side of the existing building, respectively, and one or a plurality of the pumping and injection wells are connected to the injection well and the pumping well. As will be disposed between the water well is provided as a slanted well formed obliquely contaminated soil immediately below the existing building from the outside of the existing building.

  In the first aspect of the present invention, the chemical is removed by injecting the chemical that promotes the movement of the pollutant to infiltrate the contaminated soil and pumping the ground water containing the pollutant whose movement is promoted by the chemical. Is done.

  And by providing a pumping and injection well, it becomes possible to perform both an injection | pouring operation and a pumping operation with one well, and contaminated soil is purified efficiently.

  For example, when two pumping and injection wells are provided, after injecting a drug from one side and pumping from the other side, this time injecting a drug from one side and pumping from the other side, this time injecting a drug from the other side. By pumping water from one side, it is possible to purify the pollutants more reliably and more efficiently than in the case where a plurality of wells are provided.

  Or, for example, it is possible to remove a wide range of pollutants by excavating and forming a pumping / injecting well from one side to the other, and performing the injection and pumping operations in order in one well. It is.

Moreover, the chemical | medical agent which accelerates | stimulates the movement of a pollutant is inject | poured and permeate | transmitted to contaminated soil, and a pollutant is removed by pumping the ground water containing the pollutant which the movement was promoted by the chemical | medical agent.

  Here, when there is only one pumping / injecting well, the chemical is injected from the injection well and infiltrated into the contaminated soil and pumped up from the adjacent pumping / injecting well, and the chemical is injected from this pumping / injecting well and contaminated. By infiltrating the soil and pumping from the pumping well, the pollutant is removed from the contaminated soil between the injection well and the pumping well.

  If there are multiple pumping and injection wells, inject the chemical from the injection well and infiltrate the contaminated soil, pump up the pumping and injection well adjacent to the injection well, and inject the chemical from this pumping and injection well. Infiltrate into contaminated soil. Further, water is pumped from a pumping / injecting well adjacent to the pumping / injecting well, and a chemical is injected to infiltrate the contaminated soil. And finally, by pumping up from the pumping well, the pollutant is removed from the contaminated soil between the injection well and the pumping well.

  In other words, groundwater containing pollutants whose movement has been promoted by the chemicals injected from the injection well or pumping / injecting well placed on one side and permeating into the contaminated soil, By pumping from the pumping well, pollutants are removed from the contaminated soil between the injection well and the pumping well.

  In this way, a pumping / injecting well capable of performing both the pumping work and the pouring work is provided between the pouring well and the pumping well, and the chemical that promotes the movement of the pollutant is infiltrated into the contaminated soil. Thus, even if the space between the injection well and the pumping well is wide, that is, the area to be purified is wide, the pollutant is efficiently removed from the contaminated soil. That is, the contaminated soil is efficiently purified.

Further, for example, as compared with the case where the pumping / injection well is a vertical well, purification can be performed over a wide range in the horizontal direction. Therefore, the pollutant is removed from the contaminated soil more efficiently. That is, the contaminated soil is more efficiently purified.

  In addition, since a pumping and injection well (diagonal well) can be provided directly under the existing building, the contaminated soil is efficiently purified even if the contaminated soil (contaminant) is directly under the existing building.

The invention according to claim 2 is the purification well according to claim 1 , wherein the pumping / injecting well is inserted into the pumping / injecting well in a contracted state, and then is expanded by injecting gas or liquid. The pumping section provided with the packer that closes and closes the inner wall surface of the pumping / injecting well so that the pumping section performs the pumping operation, and the injection is performed on the lower side of the pumping section. The packer portion is provided with movement resistance reducing means that abuts against the inner wall surface and reduces movement resistance in at least the axial direction of the packer portion.

In the invention according to claim 2 , the specific gravity is lighter than water by injecting the drug from the injection section at a position deeper than the pumping section, and pumping from the pumping section at a position shallower than the injection section, for example, The movement of pollutants such as mineral oil is effectively promoted, and as a result, the pollutants are more efficiently removed from the contaminated soil. That is, the contaminated soil is further effectively purified.

  Further, the packer part is smoothly inserted into the pumping / injecting well by the movement resistance reducing means, and after the purification work is completed, the packer part is smoothly pulled out from the pumping / injecting well.

  If the pumping / injecting well is a slanted well, it may be difficult to insert / pull without a moving resistance reducing means. Therefore, especially when the pumping / injecting well is a slanted well, the moving resistance reducing means Is preferably provided.

The invention according to claim 3 is the purification well according to claim 2, wherein the well is inserted into the pumping and injection well, and a peripheral wall is permeable to the strainer pipe, and the strainer pipe is inserted into the well. is connected to the packer, the packer tube to inject a liquid or gas to the packer is inserted into the strainer tube, the said pumping bore in pumping segment is opened lifting pipe is inserted into the strainer tube, said inlet leg injection hole has, said injection tube having an open.

In the invention according to claim 3 , the medicine is injected into the injection section through the injection pipe and penetrates into the contaminated soil, and the groundwater in the pumping section is pumped up through the pumping pipe. Thereby, it is also possible to perform the filling operation and the pumping operation simultaneously.

  Further, since the movement resistance reducing means abuts on the strainer tube, the movement of the packer portion is performed more smoothly. Moreover, the injection pipe and the pumping pipe are smoothly inserted into the pumping and injection well.

The invention according to claim 4 is the purification well according to claim 2 or claim 3 , wherein the packer of the packer part partitioning the pumping section is contracted, and the packer part is moved in the axial direction. The depth of the pumping section is adjusted according to the groundwater level.

The invention according to claim 4, in pumping operations, contaminants such as mineral oil specific gravity than water is effectively removed, contamination soil is purified.

  In addition, since the packer part moves smoothly in the axial direction by the movement reducing means, the depth of the pumping section is adjusted smoothly.

According to a fifth aspect of the present invention, in the purification well according to the third aspect , the pumping pipe is provided with a pumping pump at a tip portion thereof, and a depth of the pumping pump is adjusted according to a groundwater level.

In the invention according to claim 5 , in the pumping operation, contaminants such as mineral oil having a lighter specific gravity than water are effectively removed, and the contaminated soil is purified.

The invention according to claim 6 is the purification well according to any one of claims 2 to 5 , wherein the packer of the packer part partitioning the injection section is contracted, and the packer part is It is moved in the axial direction and the depth of the injection section is adjusted.

In invention of Claim 6 , the movement of a pollutant is accelerated | stimulated effectively by inject | pouring a chemical | medical agent aiming at the depth with the high density | concentration of a pollutant. In addition, since the packer part moves smoothly in the axial direction by the movement reducing means, the depth of the water injection section is adjusted smoothly.

A seventh aspect of the present invention is the purification well according to any one of the first to fifth aspects, wherein the drug includes at least one of an effervescent drug and a surfactant.

In the invention according to claim 7 , at least one of the foaming agent and the surfactant peels contaminants such as mineral oil from the soil particles, and mixes the contaminants (mineral oil and the like) with the ground water. As a result, the movement of the pollutant (mineral oil or the like) is effectively promoted, and the pollutant (mineral oil or the like) is efficiently removed from the contaminated soil. That is, the contaminated soil is efficiently purified.

The invention according to claim 8 purifies the contaminated soil using the purification well according to any one of claims 1 to 7 .

In the invention according to claim 8, by using the purification well according to any one of claims 1 to 7 , the groundwater containing the pollutant in which the chemical is infiltrated into the contaminated soil and the movement is promoted by the chemical. Since the contaminated soil is purified by pumping up water, the same action as in any one of claims 1 to 7 is achieved.

  According to the purification well according to the first aspect, it is possible to remove pollutants over a wide range with a small number of wells, and as a result, the contaminated soil is efficiently purified.

According to purifying wells according to claim 2, can be pulled out together can be inserted smoothly packer unit in pumping and injection wells, after clean-up is finished, smooth packer section from pumping and injection wells.

According to the purification well of the third aspect , the medicine is injected into the injection section through the injection pipe and penetrates into the contaminated soil, and the groundwater in the pumping section is pumped up through the pumping pipe.

According to the purification well according to claim 4 , by smoothly adjusting the depth of the pumped section according to the groundwater level, contaminants such as mineral oil having a lighter specific gravity than water are effectively removed, The soil can be purified.

According to the purification well according to claim 5 , by adjusting the depth of the pump according to the groundwater level, contaminants such as mineral oil having a lighter specific gravity than water are effectively removed, and the contaminated soil is removed. It can be purified efficiently.

According to the purification well of the sixth aspect , it is possible to effectively promote the movement of the pollutant by injecting the drug aiming at the depth of the high concentration of the pollutant.

According to the purification well according to claim 7 , at least one of the foaming agent and the surfactant is mixed with mineral oil or the like in the ground water by separating the mineral oil or the like in the contaminated soil from the soil particles, and as a result, It can effectively promote the movement of mineral oil and the like, and can efficiently remove pollutants and purify contaminated soil.

According to the method for purifying contaminated soil according to claim 8, it is possible to both remove high-concentration pollutants existing in a specific location or remove pollutants diffused over a wide area. It can be purified efficiently.

  The purification apparatus provided with the purification well of 1st embodiment of this invention is demonstrated using FIGS.

  FIG. 1 is a perspective view schematically showing a configuration of a purification device 10 including a purification well 100 of the first embodiment. As shown in FIG. 1, the purification device 10 removes and purifies contaminants (details will be described later) from the contaminated soil 16 including directly under the existing building 12. The contaminated soil 16 is used to mean the soil in which the purification well 100 is installed, and the pollutant does not exist over the entire contaminated soil. For the sake of convenience, in this description, the left diagonally lower surface of the existing building 12 in FIG. 1 is the front surface 12A, the opposite side is the rear surface 12B, the diagonally upper left surface is the side surface 12C, and the opposite side is the side surface 12D.

  The purification well 100 of this embodiment is composed of three wells: an injection well 110, a pumping well 120, and a pumping / injecting well (oblique well) 130.

  The contaminated soil 16 on the front surface 12A side of the existing building 12 is provided with an injection well 110 formed by excavation in the vertical direction. Further, the contaminated soil 16 on the rear surface 12B side of the existing building 12 is provided with a pumping well 120 formed by excavation in the vertical direction. Further, a pumping and injection well 130 formed by excavating obliquely downward from the contaminated soil 16 on the side surface 12C side of the existing building 12 toward the contaminated soil 16 immediately below the existing building 12 is provided. That is, the injection well 110 and the pumping well 120 are vertical wells, and the pumping / injection well 130 is an oblique well.

  In the following description, “axial direction” refers to the axial direction of each well. That is, the vertical direction of the injection well 110 and the pumping well 120 is the axial direction, and the pumping / injection well 130 is the axial direction in the oblique direction.

  On the side surface 12C side of the existing building 12 (near the opening of the pumping / injecting well 130), the drug equipment 20 having an injection pump for storing the drug and injecting the drug, and the groundwater containing the pollutant are pumped up. In addition, a wastewater treatment facility 30 including a separation tank 32 for separating contaminants and groundwater, a groundwater storage tank 34 for storing separated groundwater, and the like is provided. Details of the drug will be described later.

  An injection pipe 118 (see FIG. 2, details will be described later) of the injection well 110 and an injection pipe 360 (see FIG. 2, details will be described later) of the pumping and injection well 130 are connected to the medicine facility 20. The separation tank 32 of the wastewater treatment facility 30 includes a pumping pipe 128 of the pumping well 120 (see FIG. 2, details will be described later) and a pumping pipe 330 of the pumping and injection well 130 (see FIG. 2, details will be described later). It is connected.

  In addition, the groundwater tank 32 of the wastewater treatment facility 30 and the chemical facility 20 are connected, and the groundwater from which the pollutants are removed is mixed with the chemical.

  FIG. 2 is a vertical cross-sectional view schematically showing the purification well 100 in the contaminated soil, that is, the injection well 110, the pumping and injection well 130, and the pumping well 120. The pumping / injecting well 130 is a slanted well as described above, but is shown vertically in FIG. 2 for easy understanding. In addition, other figures are also shown vertically.

  Next, the pumping and injection well 130 will be described with reference to FIGS.

  FIG. 3 is a vertical cross-sectional view showing a schematic configuration of the pumped and injected well 130. FIG. 4 is a front view showing the packer device 200 to be inserted into the pumping and injection well. In FIG. 3, the packer device 200 is not a cross-sectional view but is illustrated in the same manner as the front view of FIG. 4.

  As shown in FIGS. 3 and 4, in the pumping and injection well 130, a strainer pipe 250 having a diameter smaller than that of the excavation hole 131 is inserted into the excavation hole 131 excavated by boring or the like. The strainer tube 250 is inserted for the purpose of preventing intrusion of earth and sand from the surrounding ground. For example, the strainer tube 250 has a structure in which a large number of holes such as slits and circles are formed in a peripheral wall so as to allow liquid permeation. Yes.

  On the outside of the strainer tube 250 (the gap between the excavation hole 131 and the strainer tube 250), the water blocking layers 50 and the filter layers 52 are alternately formed. The water blocking layer 50 is made of bentonite, mortar, or the like, and prevents permeation of liquids such as chemicals and groundwater. On the other hand, the filter layer 52 is composed of gravel, bean gravel, silica sand, sand, and the like, and allows groundwater containing chemicals and contaminants to pass therethrough. The inner wall surface 250 </ b> A of the strainer pipe 250 serves as the inner wall surface of the pumping and injection well 130.

  3 and FIG. 4 (for example, FIG. 2), the strainer tube 250, the water blocking layer 50, and the filter layer 52 are not shown.

  Further, the interval between the water blocking layers 50 corresponds to the interval between packer portions 210, 220, 230, and 240 described later. Further, the axial length of the water blocking layer 50 is formed to be shorter than the axial lengths of the packer portions 210, 220, 230, and 240.

  As shown in FIG. 4, the packer device 200 is inserted into the pumped and injected well 130 (strainer pipe 250). The packer device 200 includes packer units 210, 220, 230, 240, packer tubes 310, 320, a pumping tube 330, and an injection tube 360 as main components, and these are integrally configured.

  The packer units 210, 220, 230, and 240 are arranged at intervals in the axial direction.

  The pumping pipe 330 penetrates the packer part 210 and is joined to a casing part (not shown) constituting the packer part 210 and disk parts 214 and 216 described later by welding or the like (see also FIG. 5). The front end 332 of the pumping pipe 330 is provided so as to be positioned between the packer unit 210 and the packer unit 220. In addition, a plurality of pumping holes 334 are formed in the tip portion 332.

  The injection tube 360 penetrates the packer portions 210, 220, and 230, and includes a casing portion (not shown) that constitutes the packer portions 210, 220, and 230 and disk portions 214, 216, 224, 226, 234, which will be described later. 236 is joined by welding or the like. The distal end portion 362 of the injection tube 360 is provided so as to be positioned between the packer portion 230 and the packer portion 240. A plurality of injection holes 364 are formed in the distal end portion 362.

  The circumferential surface of each cylindrical packer part 210, 220, 230, 240 is composed of packers 212, 222, 232, 242 made of an elastic material such as rubber that expands and contracts. The packers 212, 222, 232, 242 are connected to packer tubes 310, 320 that send liquid or gas for expanding the packers 212, 222, 232, 242.

  In the packer tube 310, the upper packer tube 310A is connected to the packer 212 of the packer unit 210, and the lower packer tube 310B is connected to the packer 212 of the packer unit 210 and the packer 222 of the packer unit 220. Therefore, by sending liquid or gas from the packer tube 310 (upper packer tube 310A) and applying pressure, the packer 212 of the packer unit 210 and the packer 222 of the packer unit 220 expand (see FIG. 3), and the liquid or gas is supplied. By pulling out, the pressure decreases and the packer 212 and the packer 222 contract (see FIG. 4, see also FIGS. 6A and 6B).

  The packer tube 320 is connected to the packer 232 of the packer unit 230 after the upper packer tube 320A passes through the packer units 210 and 220, and the lower packer tube 310B is connected to the packer 232 of the packer unit 230 and the packer 242 of the packer unit 240. It is connected to the. Then, by supplying liquid or gas from the packer tube 320 (upper packer tube 320A) and applying pressure, the packer 232 of the packer unit 230 and the packer 242 of the packer unit 240 expand (see FIG. 3), and the liquid or gas is supplied. By pulling out, the packer 232 and the packer 242) whose pressure decreases are contracted (see FIG. 4, and also see FIGS. 6A and 6B).

  It should be noted that a dedicated packer tube is connected to each of the packers 212, 222, 232, and 242 of the packer units 210, 220, 230, and 240, and the packers 212, 222, 232, and 242 are individually expanded and contracted. It is good also as a structure which can be performed. With such a configuration, the packers 212, 222, 232, and 242 can be expanded and contracted more reliably.

  Although not shown, the packer portions 210, 220, 230, and 240 are axially elongated inside (specifically, inside the packers 212, 222, 232, and 242 constituting the peripheral surface of the packer portion). A configuration having a hollow tube arranged in the direction, in other words, a configuration in which the upper and lower disk portions 214 are connected by a hollow tube and a portion corresponding to the hollow tube is opened, It is good also as a structure through which the pumping pipe 330, the injection pipe 360, etc. pass.

  In FIG. 2 and the like, the packer tubes 310 and 320 are omitted for easy understanding. Further, the packer sections 210, 220, 230, and 240 have a configuration in which the pumping pipe 330, the injection pipe 360, the packer pipes 310 and 320, etc. are joined and fixed (held).

  Next, the packer units 210, 220, 230, and 240 will be described with reference to FIGS. Since the basic configuration of each packer unit 210, 220, 230, 240 is the same, the packer unit 210 will be described as a representative.

  FIG. 5 is a perspective view schematically showing the packer unit 210. 6A is a front view of the packer unit 210 in a state where the packer 212 has expanded, and FIG. 6B is a front view of the packer unit 210 in a contracted state. FIG. 7A is an enlarged view of a portion A of FIG. 6A (a disk portion 214 of the packer portion 210 (details will be described later)), and FIG. It is sectional drawing along a BB line (direction orthogonal to an axial direction).

  As shown in FIGS. 5 and 6, the packer part 210 is provided with disk parts 214 and 216 at the upper end part and the lower end part. The packer 212 described above is provided between the disc portion 214 and the disc portion 216. As described above, the liquid or gas is supplied from the packer tube 310 (upper packer tube 310A) and the pressure is applied, whereby the packer 212 of the packer unit 210 expands (see FIG. 6A), and the liquid or gas is extracted. Then, the pressure decreases and the packer 212 contracts (see FIG. 6B).

  Balls (balls) 260 as a plurality of rotating bodies are exposed from the peripheral walls 214A and 216A of the disk portions 214 and 216 at predetermined intervals in the circumferential direction. The ball 260 as the rotating body is used as a movement resistance reducing unit.

  As shown in FIG. 7, the disk portion 214 has recesses 213 formed at intervals in the circumferential direction. A hole 215 is formed at the bottom of the recess 213. A ball 260 is disposed in the hole 215, and a fitting portion 262 in which a hole 263 smaller than the diameter of the ball 260 is formed is fitted and joined to the recess 213. Note that in the cross-sectional view of FIG. 7B, the hatching indicating the cross section of the ball 260 is omitted (only the ball 260 is an external view).

  With such a configuration, the ball 260 is exposed without dropping from the disc portion 214, and the ball 260 is rotatable. The exposed ball 260 is much larger than the slit or hole formed in the strainer tube 250.

  7B, the outer shape K of the disc part 214 including the exposed ball 260 is the outermost part of the packer part 210 when the packer 212 is contracted. Further, the diameter of the outer shape K is slightly smaller than the diameter of the strainer tube 250. Note that the disc portion 216 has the same configuration and will not be described.

  Then, as shown in FIG. 4, the packer device 200 is inserted into the strainer tube 250. At this time, the packers 212, 222, 232, and 242 of the packer units 210, 220, 230, and 240 are inserted in a contracted state (see also FIG. 6B). Further, at the time of insertion (movement in the axial direction), the ball 260 as a rotating body comes into contact with the inner wall surface 250A of the strainer tube 250 and rotates, thereby reducing the movement resistance. At this time, since the exposed ball 260 is much larger than the slit or hole formed in the strainer tube 250 as described above, the ball 260 does not fit into the slit or hole.

  When the packer device 200 is inserted to a predetermined depth, the packers 212, 222, 232, and 242 are inflated to close and close to the inner wall surface 250 </ b> A of the pumping and injection well 130 (strainer tube 250). Thereby, the pumping and injection well 130 is partitioned by the packer portions 210, 220, 230, and 240, and the pumping section 132 and the injection section 134 are formed.

  Further, the tip portion 332 in which the pumping hole 334 is formed is positioned in the pumping section 132, and the tip portion 362 in which the injection hole 364 is formed is positioned in the injection section 134.

  Moreover, it arrange | positions so that the packer part 210,220,230,240 may be located inside the water stop layer 50. FIG.

  Next, the injection well 110 and the pumping well 120 will be described. The injection well 110 and the pumping well 120 are substantially the same as the pumping / injecting well 130 except for the difference between the oblique well and the vertical well and the difference in the packer device. That is, it is the same structure as the conventional well. Therefore, detailed description is omitted. Although omitted in FIG. 2, the strainer pipe 250 is also inserted into the injection well 110 and the pumping well 120, and the water stop layer 50 and the filter layer 52 are alternately formed outside the strainer pipe 250. ing. Similarly, the water blocking layer 50 is formed at a position corresponding to the packer portion.

  As shown in FIG. 2, a packer device 111 having packer portions 112 and 114 including packers 113 and 115 and an injection tube 118 as main components is inserted into the injection well 110.

  The injection well 110 is partitioned by packer portions 112 and 114 in which the packers 113 and 115 are expanded, so that an injection section 116 is formed. The packer portions 112 and 114 have the same configuration as the above-described packer portion 210 (see FIGS. 5 to 7) except that the disk portions 214 and 215 are not included.

  An injection tube 118 having an injection hole 117 formed at the tip portion 119 is inserted into the injection well 110. The injection tube 118 penetrates the packer portion 112 and is joined to a housing portion (not shown) of the packer portion 112 by welding or the like. The tip portion 119 in which the injection hole 117 is formed is located in the injection section 116.

  In addition, a packer tube (not shown) is connected to each of the packer portions 112 and 114 to send a liquid or gas for expanding and contracting the packers 113 and 115.

  A packer device 121 having a packer unit 122 including a packer 123 and a pumping pipe 128 as main components is inserted into the pumping well 120.

  The pumping well 120 is partitioned by a packer portion 122 in which the packer 123 is expanded, so that a pumping section 126 is formed. The packer unit 122 has the same configuration as the above-described packer unit 210 (see FIGS. 5 to 7) except that the disk units 214 and 215 are not included.

  In the pumping well 120, a pumping pipe 128 having a pumping hole 127 formed in the tip portion 129 is inserted. The water pumping pipe 128 penetrates the packer part 122 and is joined to a housing part (not shown) of the packer part 122 by welding or the like. A tip portion 129 in which the pumping hole 127 is formed is located in the vicinity of the upper portion of the pumping section 126.

  Next, functions and effects of the present embodiment will be described.

  As shown in FIGS. 3 and 4, when the packer device 200 is inserted into the pumped and injected well 130 (the strainer tube 250), the packers 212, 222, 232, and 242 are inserted in a contracted state. At that time, the exposed ball 260 abuts on the inner wall surface 250 </ b> A of the strainer tube 250 and rotates to reduce the axial movement resistance. Thereby, even if it is an oblique well, the packer apparatus 200 can be inserted smoothly.

  At this time, the rubber packers 212, 222, 232, and 242 do not come into contact with the inner wall surface 250A and are rubbed and are not damaged or used. Similarly, the injection pipe 330 and the pumping pipe 360 are also in contact with the inner wall surface 250A, and can be smoothly inserted without being damaged or gripped.

  Moreover, when the purification work of the contaminated soil 16 to be described later is completed and the packer device 200 is pulled out, it can be pulled out smoothly in the same manner.

  Further, since the ball 260 similarly reduces the resistance not only in the axial direction but also around the axis, the ball 260 can be inserted and pulled out more smoothly.

  Further, when adjusting the depth of the pumping section 132 (the depth of the tip 332 of the pumping pipe 330) and the depth of the injection section 134, which will be described later, the movement can be performed smoothly.

  Next, purification of the contaminated soil 16 (removal of contaminants) will be described. In the following explanation, the main pollutant to be purified is mineral oil. The drug is a drug in which an effervescent drug and a surfactant are mixed.

  As shown in FIG. 2A, the drug is injected into the injection section 116 from the injection tube 118 of the injection well 110. The drug injected into the injection section 116 passes through the strainer tube 250 (see FIG. 3) and the filter layer 52 (see FIG. 3) and penetrates into the contaminated soil 16. The infiltrated drug reacts with the pollutant, thereby promoting the movement of the pollutant.

  Specifically, contaminants are separated from soil particles in the soil and solubilized in groundwater by the emulsifying action of the surfactant in the drug. In addition, the pollutant is peeled off from the soil particles in the soil also by the foamed foaming agent. As a result, the pollutant is mixed or dissolved in the groundwater, and the movement of the pollutant in the contaminated soil is promoted. In addition, the chemical | medical agent containing only any one of a foaming chemical | medical agent and surfactant may be sufficient.

  Further, when the packer device 111 is inserted, the drug is injected into the injection section 116 in accordance with the depth of the high concentration of the pollutant, so that the pollutant and the drug react and the movement of the pollutant is promoted more effectively. The Even after the insertion, the packers 113 and 115 are contracted to move the entire packer device 111 in the axial direction (up and down), and the injection section 116 is injected with the concentration of the pollutant at a high depth. May be.

  Simultaneously with the injection operation, the contaminants are removed by pumping the groundwater containing the contaminants that have reacted with the chemicals and promoted movement from the pumping pipe 330 of the pumping / injection well 130. At this time, in this embodiment, the pollutant is mineral oil and has a specific gravity lighter than that of water (groundwater). Therefore, the pollutant moves and gathers near the groundwater level. Therefore, the entire packer device 200 is moved in the axial direction (up and down) in a state where the packer is contracted (see FIG. 6B), and the depth of the pumping section 132 (the tip 332 of the pumping pipe 330) is brought close to the groundwater level W. Together, the pollutants are efficiently removed.

  In addition, the range to which it moves to an axial direction is performed in the range which the water stop layer 50 is not exposed. At this time, the ball 260 is in contact with the inner wall surface 250A, so that the packer device 200 is smoothly moved in the axial direction.

  The groundwater containing the polluted pumped water is separated in the separation tank 32 of the wastewater treatment facility 30 and sent to the groundwater storage tank 34 for storage. And when inject | pouring a chemical | medical agent, ground water is returned in contaminated soil by mixing this purified ground water.

  Next, as shown in FIG. 2 (B), the medicine is injected into the injection section 134 from the injection pipe 360 of the pumped and injected well 130. The drug injected into the injection section 134 passes through the strainer tube 250 (see FIG. 3) and the filter layer 52 (see FIG. 3) and penetrates into the contaminated soil 16. Movement is facilitated by the permeated drug reacting with contaminants. At this time, the entire packer device 200 is moved in the axial direction (up and down), and the medicine is injected in the injection section 134 according to the depth of the high concentration of the contaminant. In addition, the range to which it moves to an axial direction is performed in the range which the water stop layer 50 is not exposed. At this time, the ball 260 is in contact with the inner wall surface 250A, so that the packer device 200 is smoothly moved in the axial direction.

  At the same time, the pollutant is removed from the pumping pipe 128 of the pumping well 120 by pumping the groundwater containing the pollutant that has reacted with the chemical and promoted movement. At this time, similarly, the entire packer device 121 is moved (up and down) in the axial direction, and the vicinity of the lower surface of the packer unit 122 is adjusted to the vicinity of the groundwater level W, so that the pollutants are efficiently removed.

  Then, the groundwater containing the pumped pollutant is separated from the groundwater in the separation tank 32 of the wastewater treatment facility 30 and sent to the groundwater storage tank 34 for storage. And when inject | pouring a chemical | medical agent, groundwater is returned in soil by mixing similarly purified groundwater.

  Thus, the pumping / injecting well capable of infiltrating the contaminated soil 16 with the chemical that promotes the movement of the pollutant and performing both the pumping work and the pouring work between the pouring well 110 and the pumping well 120. By providing 130, even if the space between the injection well 110 and the pumping well 120 is wide, that is, the area to be purified is wide, the pollutant is efficiently removed from the contaminated soil. That is, the contaminated soil is efficiently purified.

  Moreover, since the pumping / injecting well 130 is an oblique well formed obliquely in the contaminated soil, it can be purified over a wide range in the horizontal direction compared to a vertical well. Therefore, the pollutant is removed from the contaminated soil more efficiently. That is, the contaminated soil is more efficiently purified.

  Further, a pumping / injecting well 130 can be provided directly under the existing building 12. Therefore, even if the contaminated soil (contaminant) is directly under the existing building 12, the contaminated soil is efficiently purified. In other words, even if the existing building 12 is large and the space between the injection well 110 and the pumping well 120 is wide, the contaminated soil is efficiently purified.

  Here, in the above description, as shown in FIG. 2A, the drug reacts with the drug from the pumping pipe 330 of the pumping / injecting well 130 and moves while the drug is injected into the injection section 116 from the injection pipe 118 of the injection well 110. The groundwater containing the promoted pollutant is pumped to remove the pollutant, and then, as shown in FIG. 2 (B), the drug is injected into the injection section 134 from the injection pipe 360 of the pumping and injection well 130. Contaminants are removed by pumping groundwater containing pollutants that have reacted with chemicals and promoted movement from the pumping pipe 128 of the pumping well 120. That is, the pumping operation and the injection operation in the pumping / injection well 130 are performed separately in order.

  However, as shown in FIG. 10, these may be performed simultaneously. That is, while injecting the drug from the injection pipe 118 of the injection well 110 into the injection section 116, the groundwater containing the pollutant that has reacted with the drug and promoted movement is pumped from the pumping pipe 330 of the pumping and injection well 130, and at the same time. While injecting the drug from the injection pipe 360 of the pumping / injection well 110 into the injection section 134, the groundwater containing the pollutant that has reacted with the drug and promoted movement may be pumped from the pumping pipe 1280 of the pumping well 120. That is, in other words, the pumping work and the pouring work in the pumping and pouring well 130 are performed simultaneously.

  Thus, by performing the pumping operation and the pouring operation at the same time, contaminants can be removed from the contaminated soil 16 in a shorter time. In other words, the contaminated soil 16 can be purified more efficiently.

  Moreover, in the said embodiment, although the pumping and injection well 130 was an oblique well, a vertical well may be sufficient. In this case, a well cannot be dug directly under the existing building 12.

  Moreover, in the said embodiment, although the purification well 100 was comprised from the three wells of the injection well 110, the pumping well 120, and the pumping and injection well 130, it is not limited to this (refer FIG. 2).

  For example, as shown in FIG. 11, it may be a purification well 105 composed of four wells: an injection well 110, a pumping well 120, a pumping / well 130A, and a pumping / injecting well 130B.

  In the case of such a configuration, the chemical is injected from the injection well 110 and infiltrated into the contaminated soil to be pumped from the pumping and injection well 130A adjacent to the injection well 110, and the drug is injected from the pumping and injection well. Infiltrate into contaminated soil. Further, water is pumped from the pumping / injecting well 130B adjacent to the pumping / injecting well 130A, and a chemical is injected to infiltrate the contaminated soil. And finally, by pumping up from the pumping well 120, the pollutant is removed from the contaminated soil 16 between the injection well 110 and the pumping well 120.

  In addition, it is sufficient that the injection well can perform at least an injection operation, and the pumping well only needs to perform at least a pumping operation. Therefore, it may be a purification well in which one or both of the injection well 110 and the pumping well 120 is a well having the same configuration as the pumping / injecting well 130 (a well into which the packer device 200 (see FIG. 4) is inserted). . That is, the structure provided with two or three pumping and injection wells which can perform both an injection | pouring operation | work and a pumping operation | work may be sufficient.

  Further, the purification well may be composed of two or more wells, and one or more of them may be a pumping and injection well capable of performing both an injection operation and a pumping operation.

  Here, for example, when two pumping / injection wells are provided, the drug may be injected from one side and pumped from the other side, and then the drug may be injected from the other side and pumped from the other side. By doing in this way, the removal of the pollutants is more reliably performed and more efficiently purified as compared with the configuration in which a plurality of wells are provided.

  Or, for example, it is possible to remove pollutants over a wide area by excavating and forming a pumping and injection well sequentially from one side to the other side, and then performing the injection and pumping operations sequentially in the pumping and injection well. It is.

  The purification well may be composed of four or more wells, or may be composed of two wells. That is, the purification well is composed of two or more wells, and one or more of them may be a pumping and injection well capable of performing both an injection operation and a pumping operation.

  Further, in the above embodiment, the disk portion having the ball 260 (rotating body) as the movement resistance reducing means for reducing the movement resistance of at least the axial direction of the packer portion is the packer portion of the packer device 200 of the pumping and injection well 130. Although provided in 210, 220, 230, 240, it is not limited to this. You may provide in the packer part 112 of the packer apparatus 111 of the injection well 110, and the packer part 122 of the packer apparatus 121 of the pumping well 120.

  Next, a modified example of the disk portion having the movement resistance reducing means of another example will be described.

  First, the disc part 314 of a 1st modification is demonstrated using FIG. 8A is a partially enlarged view in which a main part of the disk portion 314 is enlarged, and FIG. 8B is a cross section taken along line BB (a direction orthogonal to the axial direction) of FIG. FIG.

  As shown in FIG. 8, recesses 313 are formed in the circumferential wall 314 </ b> A of the disk portion 314 with a gap in the circumferential direction. A fitting portion 372 in which a hemispherical (mountain-shaped) convex portion 370 is formed is fitted and joined to the concave portion 313. Therefore, a plurality of hemispherical (mountain-shaped) convex portions 370 protrude from the peripheral wall 314A of the disc portion 314 at predetermined intervals in the circumferential direction.

  Note that the fitting portion 372 in which the convex portion 370 is formed is preferably made of a material having better sliding properties than the peripheral wall 314A of the disc portion 314, for example, a fluororesin.

  With such a configuration, the apex portion of the convex portion 370 as the movement resistance reducing means abuts on the inner wall surface 250A of the strainer tube 250, so that the resistance of rotation of the packer portion in the axial direction and the axial direction is reduced. Reduced.

  Next, the disc portion 414 of the second modification will be described with reference to FIG. 9A is a partially enlarged view in which a main part of the disc portion 414 is enlarged, and FIG. 9B is a cross-sectional view taken along line BB (axial direction) of FIG. Therefore, the vertical direction in FIG. 9B is the axial direction.

  As shown in FIG. 9, recesses 413 are formed in the peripheral wall 414 </ b> A of the disc portion 414 with a gap in the circumferential direction. A wheel holding member 462 in which a rotating shaft 461 of the wheel 460 is rotatable is fitted and joined to the recess 413. A hole 415 is formed on the bottom surface of the recess 413 so that the wheel 460 does not interfere.

  A rotation shaft 461 of the wheel 460 is set to a direction orthogonal to the axial direction. Therefore, the wheel 460 rotates in the axial direction.

  With such a configuration, the wheel 460 (rotating body) as the movement resistance reducing means abuts on the inner wall surface 250A of the strainer tube 250 and rotates, so that the movement resistance in the axial direction of the packer portion is reduced. .

  In the present embodiment, as shown in FIG. 4, in the packer device 200, the intervals between the packer units 210, 220, 230, and 240 are fixed, but the intervals between the packer units 210, 220, 230, and 240 are variable. The configuration may be (adjustable). Therefore, a modified example of the packer device in which the intervals between the packer units 210, 220, 230, and 240 are variable (adjustable) will be described next.

  FIG. 14 is a perspective view showing a packer unit 210 of a packer device 700 according to a modification. FIG. 15 is a front view schematically showing a main part of a packer device 700 according to a modification. In FIG. 15, illustration of the packer tubes 310 and 320 and the injection tube 360 is omitted.

  As shown in FIGS. 14 and 15, the pumping pipe 630 has a flange 632 at the tip. As shown in FIG. 15, an adjustment pumping pipe 629 having flanges 632 at both ends is disposed between the upper pumping pipe 630 and the lower pumping pipe 630, and the flange parts 632 are joined to each other (for example, Bolted). In other words, the upper and lower pumping pipes 630 are connected by the adjusting pumping pipe 629. The pumping pipe 630 and the adjusting pumping pipe 629 are affected by negative pressure, and are made of a material having high rigidity, for example, a metal pipe such as steel, cast iron, or aluminum.

  There are different types of adjustment pumping pipes 629 that are different in overall length and can be replaced. Further, the rod 600 described later (precisely, the adjustment rod 620) is also of a different type and can be replaced. Therefore, the interval between the packer portions 210 and 220 can be changed (adjusted) by exchanging the adjustment pumping pipe 629 and the adjustment rod 620.

  The rod 600 includes a connecting rod 610 and an adjusting rod 620. As shown in FIG. 14, the packer portion 220 is provided with a connecting rod 610 extending in the axial direction from the disk portions 224 and 226. Similarly, the packer part 210 is provided with a connecting rod 610 extending in the axial direction from the disk part 216 (see FIG. 15). A male screw portion 602 is formed at the distal ends of the connecting rod 610 and the adjusting rod 620. There are different types of adjustment rods 620 having different overall lengths.

  Then, as shown in order in (1) to (3) of FIG. 16, an adjustment rod 620 is disposed between one connecting rod 610 and the other connecting rod 610, and the male thread portion 602 of the connecting rod 610 By screwing the high nut 650 into the male thread portion 602 of the adjustment rod 620, the packer portions 210 and 220 are connected (as described above, the packer portion 210, the connection rod 610, the adjustment rod 620, the connection rod 610). As a result, the entire rod 600 is variable (adjustable).

  As described above, the adjustment rod 620 is of a type having a different overall length, and can be adjusted to the interval between the packer portions 210 and 220 according to the length of the adjustment pumping pipe 629. Furthermore, the overall length of the rod 600 can be finely adjusted by adjusting the screwing allowance between the male screw portion 602 and the high nut 650. In this manner, the interval between the packer units 210 and 220 can be adjusted.

  Although not shown, the packer portions 230 and 240 are also provided with the same rod 600, and the interval between the packer portions 220, 230, and 240 can be adjusted by changing the length of the adjustment rod 630. .

  In the present embodiment, three rods 600 are provided, but the present invention is not limited to this. One or more rods 600 are sufficient. Further, the steel rod 600 described above may be a single member, and the member corresponding to the other rod 600 may be a steel wire or the like.

  Further, the connecting rod 610 and the adjusting rod 620 may be connected by a member other than the high nut 650. For example, as shown in FIG. 17A, the connecting rod 610 and the adjusting rod 620 may be connected by a sleeve tube 660.

  In the sleeve tube 660, female screw holes 662 are formed in the peripheral wall 660 </ b> A at intervals in the axial direction (four female screw holes 662 are formed in this embodiment).

  As shown in FIG. 17B, the shaft centers of the connecting rod 610 and the adjusting rod 630 are made to coincide with each other in a state where the sleeve tube 660 is inserted through the adjusting rod 620 in advance. As shown in FIG. 17C, in this state, the sleeve tube 660 is slid in the axial direction to be inserted through both the connecting rod 610 and the adjusting rod 620. Then, the connecting rod 610 and the adjusting rod 620 are connected by screwing and tightening a bolt 661 into each female screw hole 662 of the sleeve tube 660 (see FIG. 17A). Note that the total length can be finely adjusted by adjusting the insertion allowance in which the connecting rod 610 and the adjusting rod 630 are inserted into the sleeve tube 660.

  On the other hand, the packer tubes 310 and 320 and the injection tube 360 are flexible and elastic materials, for example, rubber or synthetic resin hoses. The total length of each is set slightly longer than the expected interval between the packer portions 210, 220, 230, and 240. Therefore, even if the interval between the packer portions 210, 220, 230, and 240 is changed (adjusted), it follows by bending. The packer tubes 310 and 320 and the injection tube 360 are preferably bellows because they are more easily bent. The entire tube (hose) may have a bellows shape or may have a partially bellows shape. Alternatively, only a part of the packer tubes 310 and 320 and the injection tube 360 may be composed of a hose made of a flexible and stretchable material (made of rubber or synthetic resin).

  Also, like the pumping pipe 630, the packer pipe, the injection pipe, and the rod also have a flange at the tip, and the total length can be changed by replacing the packer pipe, injection pipe, and rod with different lengths. It may be.

  This modification is an example of a configuration in which the intervals between the packer units 210, 220, 230, and 240 can be changed (adjustable), and is not limited to such a configuration. Any configuration may be used as long as the interval between the packer units 210, 220, 230, and 240 is variable (adjustable).

  Thus, by making the intervals between the packer units 210, 220, 230, and 240 variable (adjustable), the optimal intervals and positions of the packer units 210, 220, 230, and 240 can be obtained. Even in the same purification site, depending on the location of the well (for example, in the pumping / injecting well 130A and the pumping / injecting well 13B shown in FIG. 11), the optimal interval and position of the packer portions 210, 220, 230, 240 However, it is possible to easily cope with such a configuration.

  In addition, as shown in FIG. 15, the structure which connects the flanges 632 of the upper and lower pumping pipes 630 may be sufficient instead of the structure which connects between the upper and lower pumping pipes 630 by the adjustment pumping pipe 629. In this case, the pumping pipe 630 is of a type that is different in overall length from the joint portion (root portion) to the disc portion to the flange 632 and can be replaced. And the space | interval of the packer parts 210 and 220 can be changed (adjusted) by exchanging for the pumping pipe 630 of different full length, and joining pumping pipes.

  Next, the purification well according to the second embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to a member similarly to 1st embodiment, and the overlapping description is abbreviate | omitted.

  FIG. 12 is a diagram schematically showing the purification well 107 of the second embodiment. In the present embodiment, the purification well 107 is composed of three wells: an injection well 110, a pumping well 520, and a pumping and injection well (oblique well) 530. As in the first embodiment, the pumping and injection well 530 is an oblique well, but is shown vertically in FIG.

  The packer device 510 includes the packer units 230 and 240 and the injection tube 360 as main components, and these are integrally configured.

  The injection tube 360 penetrates the packer portion 230 and is joined to a housing portion (not shown) and the disc portions 234 and 236 constituting the packer portion 230 by welding or the like. The distal end portion 362 of the injection tube 360 is provided so as to be positioned between the packer portion 230 and the packer portion 240. A plurality of injection holes 364 are formed in the distal end portion 362.

  Thereby, the pumping / injecting well 530 is partitioned by the packer portions 230 and 240, and the pumping section 532 (actually, the section from the packer section 230 to the groundwater level W) and the injection section 134 are formed.

  A pumping pipe 536 to which a pumping pump 538 having a pumping hole 539 is attached is inserted. The pump 538 is inserted so as to be located slightly below the groundwater level W.

  Similarly, in the pumping well 520, a pumping pipe 526 to which a pumping pump 528 in which a pumping hole 529 is formed is attached is inserted so that the pumping pump 528 is located slightly below the groundwater level W.

  Next, functions and effects of the present embodiment will be described.

  The drug is injected into the injection section 116 from the injection tube 118 of the injection well 110. The drug injected into the injection section 116 penetrates into the contaminated soil 16. Movement is facilitated by the permeated drug reacting with contaminants.

  At the same time, from the pumping pump 538 attached to the pumping pipe 536 of the pumping / injecting well 530, the pollutant is removed by pumping up the groundwater containing the pollutant that has reacted with the chemical and promoted movement. At this time, in this embodiment, the pollutant is mineral oil and has a specific gravity lighter than that of water (groundwater), so that the pollutant moves and gathers near the groundwater level. By moving the pump 538 in the axial direction (up and down) and adjusting it to the vicinity of the groundwater level W, pollutants are efficiently removed.

  In addition, the medicine is injected into the injection section 134 from the injection pipe 360 of the pumping and injection well 530. The drug injected into the injection section 134 penetrates into the contaminated soil 16. Movement is facilitated by the permeated drug reacting with contaminants. At this time, the entire packer device 510 is moved (up and down) in the axial direction, and the medicine is injected in the injection section 134 according to the depth of the high concentration of the contaminant.

  At the same time, from the pumping pump 528 attached to the pumping pipe 526 of the pumping well 520, the pollutant is removed by pumping the groundwater containing the pollutant that has reacted with the chemicals and promoted movement. At this time, pollutants are efficiently removed by moving the pumping pump 528 in the axial direction and adjusting it to the vicinity of the groundwater level W.

  In this embodiment, similarly to the first embodiment, the pumping work and the pouring work in the pumping / injecting well 530 may be performed separately or sequentially.

  Moreover, the purification well comprised from four wells may be sufficient, or the purification well comprised from two wells may be sufficient. That is, the purification well is composed of two or more wells, and one or more of them may be a pumping and injection well capable of performing both an injection operation and a pumping operation.

  Further, similarly to the modified example of the first embodiment (see FIGS. 14 to 17), the rod 600 is provided in the packer portions 230 and 240, and the packer portion 230, A configuration in which the interval 240 can be adjusted may be adopted.

  Next, the drug will be described in detail.

  Examples of the surfactant include an anionic (anionic) surfactant or a nonionic surfactant having an HLB value of 7 to 18, such as polyoxyethylene alkyl ether.

  In addition, as effervescent drugs, hydrogen peroxide generators that dissociate into hydrogen peroxide and generate oxygen when dissolved in water (peracetate, alkaline earth metal sulfate perhydrogen load, uric acid hydrogen peroxide adduct, Amino acid hydrogen peroxide over-adduct, melanin hydrogen peroxide adduct, amino acid hydrogen peroxide adduct) and hydrogen peroxide.

  The pollutant is not specified as mineral oil. For example, volatile organic chlorine compounds and heavy metals can be removed from contaminated soil by the same device (purification well) and purification method, and the contaminated soil can be purified.

  Moreover, the chemical | medical agent used is selected according to a contaminant. For example, in addition to the surfactant and foaming agent described above, an oxidizing agent, a metal-based reducing agent, a microbial agent, nutrient salts, and the like can be given.

  In short, any agent that reacts with the pollutants in the contaminated soil and promotes the movement of the pollutants by mixing or dissolving the pollutants in the ground water, for example, may be used.

  Note that the table in FIG. 13 shows an example of combinations of contaminants (substances to be removed) and chemicals to be used.

  The packer devices 111, 121, 200, 510, and 700, and the pumping pipes 526 and 536 with the pumps 528 and 538 attached to the tip end are inserted and pulled out or the depth adjustment is performed by the packer devices 111, 121, 200, and 510. 700, an existing axial movement device (not shown) capable of moving the pumping pipes 526 and 536 in the axial direction, for example, a winch, a crane, or the like. Further, it may be performed manually.

It is a section perspective view showing a purification device provided with a purification well concerning a first embodiment of the present invention. While showing typically the purification well which concerns on 1st embodiment of this invention, (A) is explanatory drawing explaining a mode that inject | pours a chemical | medical agent from an injection well, and pumps up from a pumping and injection well, (B) is It is an explanation for explaining a state in which a drug is injected from a pumping and injection well and pumped from the pumping well. It is sectional drawing which shows the pumping and injection well of the purification well which concerns on 1st embodiment of this invention. It is a front view which shows the packer apparatus inserted in the pumping and injection well of the purification well which concerns on 1st embodiment of this invention. It is a perspective view which shows the packer part of the packer apparatus inserted in the pumping and injection well of the purification apparatus which concerns on 1st embodiment of this invention. (A) is a figure which shows the state which the packer part of the packer apparatus of the pumping and injection well of the purification well which concerns on 1st embodiment of this invention expanded, (B) is a figure of the state which the packer part contracted. . (A) is the elements on larger scale which expanded the A section of Drawing 6 (A), and (B) is a sectional view which met the BB line of (A). (A) is the elements on larger scale which expanded the principal part (part corresponding to Drawing 7 (A)) of the disk part of the first modification, and (B) is along the BB line of (A). FIG. (A) is the elements on larger scale which expanded the principal part (part corresponding to FIG. 7 (A)) of the disc part of a 2nd modification, (B) is along the BB line of (A). FIG. It is explanatory drawing explaining a mode that a pumping operation | work and an injection | pouring operation | work are simultaneously performed in a pumping / injection well. It is a figure which shows typically the other example of the purification well which concerns on 1st embodiment of this invention. It is a figure which shows typically the purification well which concerns on 2nd embodiment of this invention. It is a table | surface which shows the example of a combination of a pollutant and a use chemical | medical agent. It is a perspective view which shows the packer part of the packer apparatus of a modification. It is a front view which shows typically the principal part of the packer apparatus of a modification. It is explanatory drawing explaining the connection of an adjustment rod and a connection rod to (1)-(3) in order. (A) is a perspective view which shows the other example of the connection part of an adjustment rod and a connection rod, (B) and (C) are explanatory drawings explaining connection of an adjustment rod and a connection rod in order.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Purification well 105 Purification well 107 Purification well 110 Injection well 120 Pumping well 130 Pumping and injection well 130A Pumping and injection well 130B Pumping and injection well 210 Packer part 212 Packer 220 Packer part 222 Packer 230 Packer part 232 Packer 240 Packer part 242 Packer 250 Strainer tube 250A Inner wall 260 Ball (Moving resistance reduction means)
330 Pumping pipe 334 Pumping hole 360 Injection pipe 364 Injection hole 370 Convex part (movement resistance reduction means)
460 wheels (moving resistance reduction means)
520 Pumping well 530 Pumping and injection well 536 Pumping pipe 538 Pumping pump 630 Pumping pipe

Claims (8)

A purification well that pumps groundwater containing pollutants that have been infiltrated into the contaminated soil directly under the existing building and promoted by the agents,
Have an injection tube and the pumping tube, the injection job to infiltrate an agent for promoting the transfer of material to the contaminated soil by injecting from the injection pipe, the riser pipe ground water containing contaminants moved by the drug is promoted a pumping operation of pumping from a pumping and injection wells that both can be carried out simultaneously,
An injection well capable of performing at least the injection operation;
A pumping well provided apart from the injection well and capable of performing at least the pumping operation;
Have
The injection well and the pumping well are respectively provided on one side and the other side across the existing building,
One or a plurality of the pumping and injection wells are formed obliquely in the contaminated soil immediately below the existing building from the outside of the existing building so as to be disposed between the injection well and the pumping well. A purification well provided as an oblique well. The pumping / injecting well is provided with a packer that is inserted into the pumping / injecting well in a contracted state, and then closes tightly on the inner wall surface of the pumping / injecting well by injecting or inflating a gas or liquid Divided into a pumping section for performing the pumping work and a pouring section for performing the pouring work provided below the pumping section by a plurality of packer parts,
The purification well according to claim 1, wherein the packer part is provided with a movement resistance reducing means that abuts against an inner wall surface and reduces a movement resistance of at least the axial direction of the packer part. A strainer pipe inserted into the pumping / injecting well and having a peripheral wall permeable,
A packer tube inserted into the strainer tube, connected to the packer of the packer portion, and injecting liquid or gas into the packer;
Is inserted into the strainer tube, and the pumping tube pumping hole is open to the pumping section,
Is inserted into the strainer tube, said injection tube injection hole in the injection section is an opening,
The purification well according to claim 2 having   The packer of the packer part partitioning the pumping section is contracted, the packer part is moved in the axial direction, and the depth of the pumping section is adjusted according to the groundwater level. The purification well described.   The purification well according to claim 3, wherein the pumping pipe is provided with a pumping pump at a tip portion thereof, and a depth of the pumping pump is adjusted according to a groundwater level.   The packer of the packer part partitioning the injection section is contracted, the packer part is moved in the axial direction, and the depth of the injection section is adjusted. The purification well described.   The said chemical | medical agent is a purification well of any one of Claims 1-6 containing at least one of a foaming chemical | medical agent and surfactant.   The purification method of the contaminated soil using the purification well of any one of Claims 1-7.

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