JP3535437B2 - Well structure and well structure row for contaminated soil purification, and contaminated soil purification method using the same - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a structure for purifying contaminated soil for purifying groundwater and gas (air) contained in contaminated soil polluted by pollutants, and a contaminated soil purification method using the same. Belongs to the technical field related to.

[0002]

2. Description of the Related Art As a technique for purifying groundwater in contaminated soil, as shown in FIG. 13 , a well structure 1 for contaminated soil purification is inserted into a ground 2 near a contaminated soil area, and a well void 3 is formed in the ground. Small hole 11 of well structure 1 for forming and purifying contaminated soil
It is widely practiced to pump up groundwater 4 that has flowed into the well cavity 3 from a well by a pumping pump 5 and purify it with a purification treatment device 6 installed on the ground. The groundwater 4 purified by the purification device 6 is generally discharged to sewage or a river.

Conventionally, as a well structure for cleaning contaminated soil used in this technique, for example, Japanese Patent Laid-Open No. 9-22836 is known.
The one described in Japanese Patent Publication No. 2 is known.

This conventional well structure for purifying contaminated soil is
The small hole 11 into which the groundwater 4 flows is formed in a square tubular pile body that is opened only on one surface, and the small hole 11 is driven adjacent to the upstream side of the groundwater flow to form a water blocking wall. It is a thing.

According to this conventional well structure for purifying contaminated soil, outflow of contaminated groundwater from the constructed water blocking wall to the downstream side is reliably prevented.

[0006]

However, in the purification of the contaminated soil using the above-mentioned well structure for purifying the contaminated soil, by constructing the water blocking wall, the natural flow of groundwater is blocked or the flow rate is changed. However, there is a problem that it affects the natural environment in terms of hydraulics.

Further, in the conventional well structure for purifying contaminated soil, since it is composed of a square tubular pile body, a gap is likely to be formed by driving it adjacently, and the water blocking performance of the water blocking wall is low. There is a problem. Further, since it is designed and manufactured exclusively for the well structure for cleaning the contaminated soil, the manufacturing cost increases.

The present invention has been made in view of the above problems, and focuses on adding a well void for purifying sewage soil to the sheet pile, and a water blocking wall can be easily provided by the connecting function of the sheet piles. A first object is to provide a contaminated soil purification structure including a sheet pile or a sheet pile array configured as described above.

A second object of the present invention is to provide a method for cleaning contaminated soil using the structure for cleaning contaminated soil according to the present invention.

[0010]

In order to solve the above-mentioned first problem, a well structure and a well structure row for purifying contaminated soil according to the present invention employ the following means.

That is, the well structure according to claim 1 is a tubular body which is buried in the ground in the vicinity of a contaminated soil area to form a vertically long well void and which has a communication structure with the outside. , A well structure provided with a connecting functional member which is extended from the side surface of the tubular body and can be watertightly connected to another structure.
The tubular body is connected to the sheet by fixing the abutting plate to the convex wall plate of the sheet pile.
It is formed by closing the lower end with the binding function member,
As a structure, there is a communication hole in at least one of the convex wall plate and the contact plate.
A partition plate is fixed to the convex wall plate of the sheet pile and the contact plate.
Wells are divided into multiple voids, and groundwater is stored in one divided room.
The inflow chamber is formed, and the groundwater discharge chamber is formed in the other room.
Lies in the fact that. The well structure is preferably formed to have a vertically long dimension sufficient to form a well void in the ground in a vertically elongated shape.

[0012] Further , as described in claim 3, the contaminated soil
It is buried in the ground near the area to form a vertically long well void.
In addition, the well cavity has a cylindrical body with a structure for communicating with the outside.
And it is watertight from other structures overhanging from the side of this tubular body.
Is a well structure including a connecting functional member that can be connected to
The tubular body has a connecting function by fixing the plate to the convex wall plate of the sheet pile.
It is formed by closing the lower end between the member and the communication structure.
And at least one of the convex wall plate and the contact plate has a communication hole.
The contact plate is provided with a cylindrical chamber, and the contact with the concave wall plate part of the sheet pile is performed.
At the same time the well gap is divided into multiple sections due to the fixation of the plates
-Shaped chamber is formed, and the groundwater inflow chamber is formed in one partitioned room.
And the groundwater discharge chamber is formed in another room.
To collect.

According to these means of claim 1 and claim 3 , when the well structure is buried in the ground, a vertically long well void is formed in the tubular body, and the well void has an inflow function / pumping function as a communication structure. -A water blocking wall can be formed by obtaining one of the drainage functions and further water-tightly connecting to another structure through the connecting function member on the side surface. Also, using the sheet pile
A water blocking wall consisting of connecting functional members on both sides.
Water-stopping performance of In addition, the existing product of sheet pile
Manufacturing costs will not increase with use. In addition, partition on this plate
By providing a plate or a cylindrical chamber,
Distribution of groundwater is divided. At that time, the groundwater inflow chamber
And a discharge chamber are formed.

Further, as described in claim 2, a cylindrical body which is buried in the ground near the contaminated soil area to form a vertically long well void and which has a communication structure to the outside, The connecting function member that is extended from the side surface of the tubular body and is watertightly connectable to another structure, and the tubular body and the connecting function member that project downward from the lower end of the tubular body and are driven into the ground. Well with driving shoe for guiding inside
The structure is a cylindrical body and the plate is fixed to the convex wall plate of the sheet pile.
The lower end is closed between the connecting function member and
As a communication structure, at least one of the convex wall plate and the contact plate
A communication hole is provided, and a partition plate is provided between the convex wall plate of the sheet pile and the corresponding plate.
A well-separated room that is divided into multiple well voids
Groundwater inflow chamber is formed in the other, groundwater discharge chamber is formed in the other room
It is characterized by being .

Further , as described in claim 4, contaminated soil
It is buried in the ground near the area to form a vertically long well void.
In addition, the well cavity has a cylindrical body with a communication structure to the outside.
And it is watertight from other structures overhanging from the side of this tubular body.
And a connecting function member that can be connected to the lower end of the tubular body.
Connected to the cylindrical body by projecting inward and driving
Well with a driving shoe that guides the material into the ground
The structure is a cylindrical body and the plate is fixed to the convex wall plate of the sheet pile.
The lower end is closed between the connecting function member and
As a communication structure, at least one of the convex wall plate and the contact plate
A communication hole is provided, a cylindrical chamber is provided on the plate, and
The well plate is divided into multiple well cavities by fixing the plate to the concave wall plate.
At the same time, a cylindrical chamber is formed,
A sewage inflow chamber is formed, and a groundwater discharge chamber is formed in another room.
It is characterized by

According to the means of claims 2 and 4, these are embedded by being driven into the ground by using the driving shoe as a guide, thereby forming a well void , and
Other structures can be connected in a watertight manner via the connecting function member.

Further, as described in claim 5 , the connecting function member is a meshing piece integrally extended from both sides of the cylindrical body.

With this means, it is possible to achieve water-tight connection by obtaining mutual meshing by the meshing pieces and improve the water-sealing performance of the water-sealing wall.

Further, as described in claim 6 , a filter is attached to the communication hole, or as described in claim 7 , the communication hole is a filter. In that case, as described in claim 8 , the driving protector is projected outside the lower part of the communication hole of at least one of the concave wall plate portion and the contact plate.

In this means, the filter prevents the intrusion of earth and sand into the well cavity . At the time of driving, the driving protection body protects the communication structure part.

Further, in order to solve the above-mentioned first problem, the well structure row for purifying contaminated soil according to the present invention employs the following means.

That is, as described in claim 9 , claim 1
Or well structure for any of the contaminated soil purification to 8 wherein is watertight link the linking function member to each other, or similar to the well structure for any of the contaminated soil purification according to claim 1-8, wherein A combination of watertightly connecting with a sheet pile having various connecting function members is selected, and the selected combination is buried in the ground near the contaminated soil area to form one or more well voids in a row. Especially.

According to this means, the water blocking walls are formed in which the well structures are watertightly connected to each other and the well voids are continuously arranged via the connecting structural members. Further, the well structure and the sheet pile are watertightly connected to each other to form a water blocking wall having a row of sheet piles having well voids .

Further, as described in claim 10 , the connecting function member of the well structure for cleaning contaminated soil according to any one of claims 1 to 8 is combined with another structure which is watertightly connected. , One or more well voids are lined up in the ground near the contaminated soil area.

According to this means, the well structure and the other structure are watertightly connected to each other, and the water blocking wall is formed between the well structure and the other structure around the well cavity .

Further, in order to solve the above-mentioned second problem, the method for purifying contaminated soil according to the present invention employs the following means.

[0027] That is, as described in claim 11, claim
The well structure rows for purifying contaminated soil according to 9 or 10 are installed at least on the upstream side and the downstream side of groundwater in the contaminated soil area, and the contaminated groundwater flowing into the well cavity on the downstream side is purified to upstream. It is to return to the well cavity on the side and inject it into the contaminated soil area to form a purified circulating water system.

In this means, the purified circulating water system from the downstream side to the upstream side is established by utilizing the well voids of the well structure row.

Further, as described in claim 12 , uncontaminated groundwater flowing into the well cavity on the upstream side from outside the contaminated soil area is discharged to the outside of the contaminated soil area via the bypass passage and the well cavity on the downstream side. It is characterized by flowing.

In this means, by ensuring the flow of uncontaminated groundwater separately from the flow of contaminated purified water, the natural flow of groundwater is blocked or the flow rate is changed by the construction of the water blocking wall. To prevent it from affecting the natural hydraulic environment.

Further, as described in claim 13 , the well structure row for purifying contaminated soil according to claim 9 or 10 ,
It is buried in the ground near the contaminated soil area to form a well void,
Installed to enclose the contaminated soil area in an airtight manner and airtightly close the plane surrounded by the well structure rows to form a purified circulating air system that injects uncontaminated air and sucks up the contaminated air. Especially.

By this means, the closed circulation space of the well structure row is utilized to establish a purified circulating air system for exchanging contaminated air with uncontaminated air.

Furthermore, as described in claim 14 ,
It is characterized in that uncontaminated air is injected from the side surface of the well structure row or the ground surface of the closed area, and the polluted air is sucked up through the well voids of the well structure row in which no air is injected.

By this means, the purified circulating air system is established by utilizing the well voids of the well structure row.

[0035]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, well structure for contaminated soil remediation according to the present invention, connected by well structure column in the well structure, contaminated soil remediation method using the well structure column, as well as their The embodiment will be described with reference to FIGS. 1 to 12 .

FIG. 1, FIG. 2 shows an embodiment of a well structure for contaminated soil remediation according to the present invention (1),
A well structure applied to a sheet pile is shown.

In this embodiment, a vertically long sheet pile 12 is used as the well structure 1 for purifying contaminated soil.
Further, engaging pieces 12a and 12b are provided in a vertically long shape on both sides as a connecting function member. The meshing pieces 12a and 12b may have a structure capable of meshing, and have curved shapes that are opposite to each other as illustrated.

A trapezoidal convex wall plate portion 12c is formed between the meshing pieces 12a and 12b of the sheet pile 12 so as to increase the earth pressure resistance and prevent bending at the time of driving. The plate 13 is fixed to the lower bottom of the trapezoid of the convex wall plate portion 12c of the sheet pile 12 by welding or the like in a vertically long shape.
A tubular body is formed in a vertically long shape by c and the contact plate 13. The contact plate 13 is preferably a flat plate as shown. Therefore, a well gap 3 having a trapezoidal cross section is formed between the convex wall plate portion 12c of the sheet pile 12 and the contact plate 13.
Although not shown, a trapezoidal plate or a curved plate protruding in a direction away from the convex wall plate portion 12c may be welded instead of the flat plate, and in this case, a wide well gap can be formed.

At the lower part of the convex wall plate portion 12c of the sheet pile 12, a large number of small holes 11 are opened as communication holes communicating with the well cavity 3. The small hole 11 can be covered with a filter 15 made of a punching plate, a mesh or the like. The filter 15 is formed by welding or the like to form the convex wall plate portion 1 of the sheet pile 12.
It is fixed to 2c.

Further, between the lower end portion of the convex wall plate portion 12c of the sheet pile 12 and the lower end portion of the abutting plate 13, the lower end of the tubular body is projected downward to be driven into the tubular body and the engagement piece 12 is formed.
A driving shoe 14 for guiding the a and 12b into the ground is fixed. The driving shoe 14 closes the well cavity 3 by being fixed to the lower end of the tubular body. Preferably, it is formed in an acute angle shape or a wedge shape so that it can easily penetrate into the ground.

According to this embodiment, by utilizing the steel sheet pile 12 which is an existing product used in civil engineering,
Since it can be manufactured by a simple work such as fixing the contact plate 13 or opening the small holes 11, the manufacturing cost becomes low.

Further, by engaging or meshing the meshing pieces 12a, 12b of the sheet pile 12 when driving adjacently, it is possible to enhance the water-sealing performance of the water-sealing wall constituted. With respect to the structure of the meshing pieces 12a and 12b of the sheet pile 12, since the existing products are not changed, the watertightness and airtightness proved in civil engineering work can be obtained as they are.

Further, the sheet pile 12 to be next driven is provided on the upper ends of the meshing pieces 12a and 12b in which the sheet pile 12 is previously driven.
When the lower ends of the meshing pieces 12a, 12b are meshed with each other, the driven meshing pieces 12a, 12b can function as a guide to drive the next sheet pile 12, thus facilitating the installation of a well structure for cleaning contaminated soil. Can be realized accurately.

Further, in this embodiment, the filter 1
Since 5 prevents the infiltration of sediment into the well cavity 3, the well cavity 3 will not be filled with sediment.

[0045] Figures 3 and 4 show an embodiment of a well structure for contaminated soil remediation according to the present invention (2).

In this embodiment, a partition plate 16 is fixed between the projecting wall plate portion 12c of the sheet pile 12 and the contact plate 13 of the above-mentioned embodiment (1) to divide the well void 3 into two. is doing. The partition plate 16 is fixed to the contact plate 13 in advance as shown in the figure, or, although not shown, the convex wall plate part 12 is previously shown.
You may stick to c. In addition, as a communication structure, the convex wall plate portion 12 is provided in one well void 3a partitioned by the partition plate 16.
The small hole 11 is communicated with c, and the small hole 11 is communicated with the contact plate 13 in the other well cavity 3b.

According to this embodiment, one well void 3a can be formed in the groundwater inflow chamber, the other well void 3b can be formed in the groundwater discharge chamber, and can have both a pumping function and a draining function. Therefore, for example, when the purification treatment device 6 shown in FIG. 11 is used, the groundwater 4 purified by the purification treatment device 6 is formed outside the water blocking wall (outside the non-contaminated area).
It can be used for flushing to.

[0048] Figure 5 shows an embodiment of a well structure for contaminated soil remediation according to the present invention (3).

In this embodiment, when the partition plate 16 is fixed between the projecting wall plate portion 12c of the sheet pile 12 and the contact plate 13 of the above-mentioned embodiment (2) to divide the well gap 3. In addition, the small hole 11 communicates with both the convex wall plate portions 12c.

According to this embodiment, one of the divided well cavities 3a is used for pumping up the contaminated groundwater 4 as described above, and the other well cavities 3b are purified by the purification treatment device 6. It can also be used for returning the groundwater 4. Even if such a use is performed, the distribution of the groundwater 4 is divided by the partition plate 16, so that the contaminated groundwater 4 and the purified groundwater 4 do not mix inside the well void 3.

[0051] Figure 6 shows an embodiment of a well structure for contaminated soil remediation according to the present invention (4).

In this embodiment, instead of the partition plate 16, a filter material 17 for purifying contaminated groundwater 4 is used, and the well void 3 is defined by this filter material 17.
A purifying agent tank is used as the filter material 17. In addition,
The small holes 11 are the same as those in the embodiment (2).

According to this embodiment, the polluted groundwater 4 can be naturally purified by passing it through the purifying agent tank 17 without pumping the polluted groundwater 4 by the pumping pump 5.

[0054] Figure 7, Figure 8 shows an embodiment of a well structure for contaminated soil remediation according to the present invention (5).

In this embodiment, the contact plate 13 is provided with a cylindrical chamber 18 in a vertically long shape.
By fixing to the convex wall plate portion 12c of No. 2, the well void 3
And a cylindrical chamber 18 are formed at the same time. In this case, if the water blocking plate 19 is provided in the chamber 18 as shown in the drawing, even if there is a dimensional tolerance in the longitudinal direction, this can be absorbed and the division can be accurately performed. In addition, as the communication structure, one well void 3 partitioned by the chamber 18 and the water stop plate 19 is used.
The small hole 11 is communicated with the convex wall plate portion 12c at a, and the small hole 11 is communicated with the contact plate 13 at the other well cavity 3b.
Small holes 11 are provided on the left and right sides of the chamber 18.

Further, in this embodiment, the concave wall plate portion 1
2c, a driving protector 2 on the outside of the lower part of the communication hole 11 of the contact plate 13
0 is projected. The driving protector 20 has a wedge shape facing downward, and the amount of protrusion may be such that there is no inconvenience such as peeling off of 15 during driving. When manufacturing,
It is fixed to the convex wall plate portion 12c or the convex wall plate portion 12c
It is realized by bending the outer side. It is desirable to add the driving protector 20 to the bottom of various communication structures.

According to this embodiment, by filling the cylindrical chamber 18 with various purifying agents, a desired purifying chamber can be formed and the inflowing groundwater can be purified in the desired purifying chamber. . In the cylindrical chamber 18, an adsorbent,
It is possible to select and fill a microbial treatment agent or a mixture thereof. Furthermore, it is possible to add or replace a purifying agent or the like to the cylindrical chamber 18 as the water quality of the groundwater changes.

[0058] Figure 9 shows an embodiment of a well structure train for contaminated soil remediation according to the present invention (1), the minimum unit as well structure example.

In this embodiment, the well structure 1 for purifying contaminated soil shown in the embodiment (2) is provided with the interlocking pieces 12 with each other.
The well structure example 1A in which the a and the 12b are meshed with each other is formed in a watertight manner. Furthermore, the above-mentioned well structure example 1
A well structure example 1B in which the sheet pile 12 is watertightly connected to the sheet pile 12 by meshing the sheet pile 12 with the meshing pieces 12a and 12b is configured.

According to this embodiment, arbitrary well structures 1 can be selected and water-tightly connected, and well structure examples 1A and 1B having desired well functions can be formed. Further, since the well structures 1 can be water-tightly connected to each other, the well void 3 can be connected to the meshing pieces 12a, 12b.
It is possible to form the water blocking walls that are arranged at intervals and continuously through the water blocking wall. Furthermore, the sheet pile 12 can be selected and watertightly connected to the well structure 1, and it becomes possible to form a water blocking wall having a row of sheet piles centering on the well cavity .

[0061] Figure 10 shows an embodiment of a well structure train for contaminated soil remediation according to the present invention (2).

In this embodiment, the well structure 1 for cleaning the contaminated soil is provided with the other structure 21 by the interlocking pieces 12a, 1 with each other.
The water-tightly coupled well structure example 1N is configured by meshing 2b. As the other structure 21, any structure may be used as long as it has an embeddable structure and at the same time has a connecting function member that can be meshed with the meshing pieces 12a and 12b, and may have, for example, a curved surface portion as illustrated.

According to this embodiment, another structure 21
Depending on the selection, there is an advantage that a combination according to the application such as securing a distance of the water blocking wall can be performed.

[0064] Figure 11 shows an embodiment of a contaminated soil remediation method according to the present invention (1).

[0065] In this embodiment, polluted soil purification well structure 1 is installed so as to surround the contaminated soil zone A square. The well structure rows 1A and 1B for cleaning the contaminated soil are installed at least in a part of the upstream side and a part of the downstream side of the flow of the groundwater 4 in the contaminated soil area A. For the other surrounding parts, a normal sheet pile 12 for civil engineering work can be used.

[0066] upstream well structure 1 for contaminated soil remediation the downstream, water pumps 5 are connected through a purification apparatus 6. That is, the well cavity 3 of the downstream well structure 1
The contaminated groundwater 4 that has flowed into the a is pumped by the pumping pump 5 from the well cavity 3b of the well structure 1 on the downstream side, purified by the purification treatment device 6, and returned to the well structure 1 on the upstream side. It has become. The purified groundwater 4 returned to the upstream well structure 1 flows into the contaminated soil area A.

The well structure 1 for purifying the contaminated soil on the upstream side and the downstream side is connected via another pumping pump 7.
That is, the uncontaminated groundwater 4 that has flowed into the well cavity 3 of the upstream well structure 1 from outside the contaminated soil area A.
Is pumped from the well cavity 3 of the upstream well structure 1 by the pumping pump 7 and returned to the downstream well structure 1. The uncontaminated groundwater 4 returned to the well structure 1 flows downstream outside the contaminated soil area A.

According to this embodiment, the contaminated soil area A
The polluted groundwater 4 in the area is circulated and purified in the polluted soil area A. Therefore, contaminated groundwater 4
Is surely purified. Further, the uncontaminated groundwater 4 outside the contaminated soil area A is flowed from the upstream to the downstream by the bypass passage configured so as to avoid the contaminated soil area A. Therefore, the natural flow of the groundwater 4 is not blocked or the flow rate is not changed, and the natural environment in terms of hydraulics is not affected.

[0069] Figure 12 shows an embodiment of a contaminated soil remediation method according to the present invention (2).

This embodiment is intended for an unsaturated body when the groundwater level is sufficiently low, and is a well structure 1 for cleaning contaminated soil so as to hermetically surround the contaminated soil area A.
Is installed. A plane surrounded by the well structure 1 for cleaning contaminated soil is airtightly closed by a cover plate 8 and a supply device 9 for supplying air 40 made of uncontaminated outside air is connected. Also,
Another well structure 1 for cleaning the contaminated soil (not specified to the above-described one according to the present invention) is provided in the contaminated soil area A by penetrating the cover plate 8 and connecting the blower 10 and the purification treatment device 30.

According to this embodiment, by utilizing the closed space of the well structure row, it is possible to establish a purified circulating air system for exchanging polluted air with uncontaminated air. The well cavity 3 of FIG.

In the above-described embodiment, the description has been given on the premise that the engaging pieces 12a and 12b are used as the connecting function members, but the invention is not limited to this. The connecting function member may be implemented in a shape other than the curved shape as long as it is watertightly meshed over the vertically long shape. Further, although the small hole 11 is illustrated and described as the communication structure in the above-described embodiment, the invention is not limited to this. Although not shown, a large hole can be provided in addition to or instead of the small hole 11 and can be selected according to the degree of pollution purification. further,
In the above-described embodiment, the well void 3 and the tubular body are illustrated and described on the assumption that they are substantially trapezoidal.
Other shapes such as those described in 040 can also be adopted, and will be selected according to the conditions such as the pumping function and the drainage function.

The embodiments described above do not hinder the combination of the embodiments.

[0074]

As described above, the well structure for purifying contaminated soil according to claim 1 of the present invention is buried in the ground in the vicinity of the contaminated soil area to form a vertically long well void and to form a well void. Can be composed of a tubular body having a structure for communicating with the outside, and a connecting functional member which is extended from the side surface of the tubular body and can be watertightly connected to another structural body. A watertight connection in a direction can be obtained to form a water blocking wall, and the water blocking performance can be improved while imparting a well function.

In particular, the use of sheet piles, which is an existing product, does not increase the manufacturing cost, and water-tight connection with existing sheet piles can be made possible. In addition, the well cavity is divided,
Can be formed in the groundwater inflow chamber and the other in the groundwater discharge chamber
It has a pumping function and a draining function.
It

Next, the well structure for purifying contaminated soil according to claim 2 of the present invention has the effect of claim 1, and
With the driving shoe, the construction work can be performed by driving like the existing sheet pile, and the construction of the water blocking wall by the well structure can be simplified.

Furthermore, in the well structure row for purifying contaminated soil according to claim 9 of the present invention, a continuous water blocking wall can be formed by arbitrarily combining well structures having a desired well function. At that time, if the connection function members of the well structure are the same, the combination with the sheet pile can be selected.Therefore, the well voids in the well structure row and the simple water blocking wall can be selected according to the flow direction of groundwater and the degree of pollution. And can be combined.

Furthermore, the well structure row for purifying contaminated soil according to claim 10 of the present invention is composed of a well structure having a desired well function and another structure by connecting the connecting function members. A water blocking wall can be formed, and a versatile combination can be performed.

Furthermore, in the method for purifying contaminated soil according to the eleventh aspect of the present invention, the purification circulating water system from the downstream side to the upstream side can be established by utilizing the well voids of the well structure row. As a result, it is possible to prevent the natural flow of groundwater from being blocked or the flow rate of the groundwater to be changed by the construction of the water blocking wall, and to prevent the natural environment in terms of hydraulics from being affected.

Furthermore, the method for purifying contaminated soil according to a thirteenth aspect of the present invention establishes a purifying circulation air system for exchanging contaminated air with uncontaminated air by utilizing the closed space of the well structure row. It is possible to prevent leakage of polluted air.

[Brief description of drawings]

FIG. 1 is a partially cut perspective view showing an embodiment (1) of a well structure for cleaning contaminated soil according to the present invention.

FIG. 2 is an enlarged cross-sectional view of FIG.

FIG. 3 is a perspective view of essential parts showing an embodiment (2) of a well structure for purifying contaminated soil according to the present invention.

FIG. 4 is an enlarged cross-sectional view of FIG.

FIG. 5 is an enlarged cross-sectional view showing an embodiment (3) of a well structure for cleaning contaminated soil according to the present invention.

FIG. 6 is an enlarged cross-sectional view showing an embodiment (4) of a well structure for purifying contaminated soil according to the present invention.

FIG. 7 is an exploded perspective view of essential parts showing an embodiment (5) of a well structure for purifying contaminated soil according to the present invention.

8 is an enlarged cross-sectional view of FIG.

FIG. 9 is a cross-sectional view showing an embodiment (1) of an example of a well structure for cleaning contaminated soil according to the present invention.

FIG. 10 is a cross-sectional view showing an embodiment (2) of an example of a well structure for cleaning contaminated soil according to the present invention.

FIG. 11 is a schematic view showing an embodiment (1) of the method for purifying contaminated soil according to the present invention.

FIG. 12 is a schematic view showing an embodiment (2) of the method for purifying contaminated soil according to the present invention.

FIG. 13 is a cross-sectional view showing a general purification technique for contaminated groundwater.

[Explanation of symbols]

1 Well structure for cleaning contaminated soil 1A, 1B, 1N Example of well structure for purification of contaminated soil 11 small holes 12 sheet pile 12a, 12b meshing piece 12c Convex wall plate 13 current plate 14 Shoe for driving 15 filters 16 partition boards 17 Filter material 18 Cylindrical chamber 20 Drive protector 21 Other structures 3, 3a, 3b Well void 40 air 4 groundwater 5 pumping pump 6 Purification processing equipment A contaminated soil area

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Claims (14)

(57) [Claims] 1. A tubular body which is buried in the ground near a contaminated soil area to form a vertically long well void and which has a structure for communicating with the outside in the well void, and which extends from the side surface of the tubular body. A well structure for purifying contaminated soil, comprising a connecting function member capable of being watertightly connected to another structure , wherein the tubular body is
Fix the plate to the convex wall plate of the sheet pile and connect it with the connecting functional member.
Formed by closing the lower end, it has a convex wall plate as a communication structure.
Communication holes are provided in at least one of
A partition plate is fixed to the convex wall plate and the contact plate to form multiple well voids.
The groundwater inflow chamber is formed in one of the divided rooms.
A well structure for purification of contaminated soil, in which a groundwater discharge chamber is formed in another room . 2. A cylindrical body which is buried in the ground in the vicinity of a contaminated soil area to form a vertically long well void and which has a communication structure to the outside in the well void, and overhangs from the side surface of the tubular body. A connection function member that can be watertightly connected to another structure,
Met well structure for contaminated soil remediation and a driving shoe for guiding the tubular member and the connecting function member by implantation protrudes downward from the lower end of the tubular body into the ground
The tubular body has a connecting function by fixing the plate to the convex wall plate of the sheet pile.
It is formed by closing the lower end between the member and the communication structure.
And at least one of the convex wall plate and the contact plate has a communication hole.
The partition plate is fixed to the convex wall plate part of the sheet pile and the contact plate.
Groundwater inflow chamber in one divided room
A pollutant is formed and a groundwater discharge chamber is formed in another room
Well structure for soil purification . 3. Vertically embedded in the ground near the contaminated soil area.
While forming a long well cavity,
A cylindrical body with a communication structure and the side surface of this cylindrical body
And a connecting function member that can be watertightly connected to other structures
A well structure for purifying contaminated soil, which has a tubular body
Fix the plate to the convex wall plate of the sheet pile and connect it with the connecting functional member.
Formed by closing the lower end, it has a convex wall plate as a communication structure.
Communication holes are provided on at least one of the
A cylindrical chamber is provided for fixing the contact plate to the concave wall plate of the sheet pile.
The well chamber is divided into a plurality of well voids, and at the same time a cylindrical chamber is formed.
The groundwater inflow chamber is formed in one of the divided rooms
Well for cleaning contaminated soil with groundwater discharge chamber
Door structure . 4. Vertically embedded in the ground near the contaminated soil area.
A long well void is formed and
A cylindrical body with a communication structure and the side surface of this cylindrical body
A connection function member that can be watertightly connected to another structure,
It projects downward from the lower end of the cylindrical body and is used for driving.
Driving that guides the tubular body and the connecting function member into the ground
It is a well structure for purifying contaminated soil, which is equipped with
The tubular body has a connecting function by fixing the plate to the convex wall plate of the sheet pile.
It is formed by closing the lower end between the member and the communication structure.
And at least one of the convex wall plate and the contact plate has a communication hole.
The contact plate is provided with a cylindrical chamber, and the contact with the concave wall plate part of the sheet pile
At the same time the well gap is divided into multiple sections due to the fixation of the plates
-Shaped chamber is formed, and the groundwater inflow chamber is formed in one partitioned room.
Contaminated soil that has been formed and has a groundwater discharge chamber formed in another room
Well structure for purification. 5. The well structure for purifying polluted soil according to claim 1, wherein the connecting functional member is a meshing piece integrally extended from both sides of the tubular body. Well structure for soil purification. 6. The well structure for purifying contaminated soil according to claim 1, wherein a filter is attached to the communication hole. 7. The well structure for purifying contaminated soil according to claim 1, wherein the communication hole is a filter. 8. The well structure for purifying contaminated soil according to claim 6 or 7 , wherein the driving protector is projected outside the lower part of the communication hole of at least one of the concave wall plate portion and the contact plate. A well structure for cleaning contaminated soil. 9. claims 1-8 either well structure for contaminated soil remediation is watertight link the linking function member to each other according or claim 1 or contaminated soil 8, wherein A combination of water-tightly connecting the purification well structure and a sheet pile having the same connecting function member is selected, and the selected combination is buried in the ground near the contaminated soil area and 1 or A well structure row for cleaning contaminated soil in which multiple well voids are arranged. 10. A well-function connecting member for cleaning a contaminated soil according to any one of claims 1 to 8 is combined with another structure that is watertightly connected, and the well is connected to the ground near the contaminated soil area. A well structure row for purifying contaminated soil in which one or a plurality of well cavities are buried and lined up. 11. The well structure row for contaminated soil purification according to claim 9 or 10 is installed at least on the upstream side and the downstream side of groundwater in the contaminated soil area, and the contaminated soil flows into the well cavity on the downstream side. A method for purifying contaminated soil, in which groundwater is purified and returned to the well cavity on the upstream side and injected into the contaminated soil area to form a purification circulating water system. 12. The method for purifying contaminated soil according to claim 11 , wherein uncontaminated groundwater that has flowed into the well void on the upstream side from outside the contaminated soil region passes through the bypass passage and the well void on the downstream side. A method for purifying contaminated soil, characterized by flowing out. 13. The well structure row for contaminated soil purification according to claim 9 or 10 is buried in the ground near a contaminated soil area to form a well void, and the well structure row is installed so as to hermetically surround the contaminated soil area. A method for purifying polluted soil, which comprises a purifying circulating air system that airtightly closes a plane surrounded by a row of well structure bodies and sucks polluted air by injecting uncontaminated air. 14. The contaminated soil purification method according to claim 13 , wherein uncontaminated air is injected from the side surface of the well structure row or the ground surface of the closed area, and the well is not injected into the well structure row. A method for cleaning polluted soil, which comprises sucking polluted air through a void.