JP2019077918A - Burial form, burial method, and burial jig for electrode body - Google Patents

Abstract

To provide a burial method for electrode body capable of providing anticorrosive effect of a long term underground burial piping by preventing increase of grounding resistance in an electrode body for electrical protection, and a burial jig for electrode body.SOLUTION: An electrode body for electrical protection of underground burial piping is buried by penetrating the same through a concrete wall 23, in which an open hole 23a is formed in the concrete wall 23, the electrode body is housed in a casing part 17 in a burial jig 15 having a base end part 16, the casing part 17 connected detachably to the base end part 16 at a rear end, and an acute part 18 connected detachably to a front end of the casing part 17, pushing pressure is loaded on the base end part 16 to push the burial jig 15 into ground through the open hole 23a from an underground pit, and the base end part 16 and the casing part 17 are extracted at a state that the electrode body is positioned in the ground to leave the acute part 18 and the electrode body in the ground.SELECTED DRAWING: Figure 3

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an embedding form, an embedding method and an embedding jig for an electrode body for cathodic protection.

Concrete pit and soil / macrocell corrosion (hereinafter referred to as "C / S macrocell corrosion") that occurs on the soil side of a building penetration part, as one of the measures against corrosion, for electrical protection along underground piping from underground pits A method (hereinafter referred to as “electrode horizontal installation method”) is known which electrochemically corrodes C / S macro cell corrosion occurring in underground underground piping by installing the electrode body of
For example, in Patent Document 1 below, an electrode device for electrical protection having a sharp metallic cylindrical container as an outer surface is inserted into the ground and installed.

Patent No. 5940490 gazette

However, in the conventional horizontal electrode installation method as in Patent Document 1, the ground resistance rapidly rises at an early stage, and a defect as an anode may be confirmed.
In the electrode horizontal installation method as disclosed in Patent Document 1, a sharp metal tubular container is used to directly press-install the electrode device for cathodic protection in the horizontal direction of the soil with a hydraulic jack or the like. The body was housed and arranged. Therefore, an anodic reaction occurs only on the outer surface of the metallic cylindrical container at the initial stage of energization, and the metal oxide formed by electrolysis of the metallic cylindrical container serves as an insulating film to reduce the effective area of the anode, thereby reducing the grounding resistance. Was rising. In particular, in the environment where sufficient moisture did not exist, the rise in grounding resistance was remarkable.
As a result, it has not been easy to obtain the anticorrosion effect of underground underground piping for a long time.

  Therefore, in the present invention, the form of burying of the electrode body, the electrode body burying form capable of obtaining the anticorrosion effect of the underground underground pipe for a long period of time by preventing the rise of the ground resistance in the electrode body for electric protection And it aims at providing the embedding jig of an electrode object.

  In order to achieve the above object, the burying form of the electrode assembly according to the present invention is a burying form of the electrode assembly for electrical protection of underground buried piping which is disposed in the ground penetrating the concrete wall from the underground pit. It is characterized in that a backfill is filled between the soil and the inner wall surface of the soil. According to such an embedding form of the electrode body, the gap formed between the electrode body and the inner wall surface of the soil can be eliminated, and the degree of adhesion of the electrode body to the soil can be improved.

  In order to achieve the above object, the embedded form of the electrode assembly according to the present invention comprises filling the space between the electrode assembly, a water-permeable outer surface material containing the electrode assembly, the electrode assembly and the outer surface material Preferably, the electrode assembly is embedded in the form of an electrode complex having a backfill embedded therein, and a backfill may be filled between the outer surface material and the inner wall surface of the soil. According to such an embedding form of the electrode body, the gap formed between the electrode complex including the electrode body and the inner wall surface of the soil can be eliminated, and the degree of adhesion of the electrode complex to the soil can be improved.

  In order to achieve the above object, the method of burying an electrode assembly according to the present invention is characterized in that the concrete wall is an electrode assembly for the corrosion protection of underground underground piping disposed through the concrete wall from the underground pit to the ground. In the concrete wall, forming a through hole in the concrete wall, a base end portion, a casing portion releasably connected to the base end portion at a rear end, and the casing portion A jig preparing step for housing the electrode body in the casing portion of the embedding jig provided with the sharpened part detachably connected to the front end of the base body, and applying pressing pressure to the base end portion to carry out the underground pit The pushing step of pushing the embedding jig into the ground through the through hole, and in the state where the electrode body is positioned in the casing portion, the base end portion and the casing portion are pulled out and the pointed into the ground It is characterized by having a drawing step of leaving the parts and the electrode body.

According to the method of burying the electrode body of the present invention, in the jig preparation step, the electrode body is accommodated in the casing portion of the embedding jig provided with the base end portion, the casing portion, and the sharpened portion, and in the pressing step The tool is pushed into the ground. Therefore, the electrode body of a desired form can be inserted to a predetermined position in the ground without being damaged by the pressure from the soil, frictional force or the like.
Further, in the drawing step, the sharp end portion and the electrode body are left in the ground by pulling out the base end portion and the casing portion. Here, the electrode body can be left undisturbedly in the ground by not pulling out the sharpened portion disposed behind the electrode body. And by pulling out a casing part, it can expose and arrange | position so that the electrode body accommodated in the casing part can contact with soil directly enough.
Therefore, it is possible to arrange in a state where it can be in direct contact with the soil at a predetermined position in the ground without damaging the desired form of the electrode body, and the grounding resistance of the electrode body for cathodic protection at the initial stage of energization It is possible to provide a method of burying an electrode body capable of obtaining an anticorrosion effect of underground underground piping for a long time by preventing the rise of

  In the method of burying the electrode body according to the present invention, in the jig preparing step, the electrode body, a water-permeable outer surface material accommodating the electrode body, and the electrode body and the outer surface material are filled. An electrode complex having a backfill in which the electrode body is buried may be accommodated in the casing portion.

According to such a method of embedding the electrode body, the outer surface of the electrode complex disposed in the ground is deformable, and can be in intimate contact with the surrounding soil to widen the contact area. In addition, since the outer surface material has water permeability and the backfill is filled between the electrode body and the outer surface material, moisture in the ground can permeate the backfill, and the electrode body is surrounded There is no gap formed.
And even if the water-permeable outer surface material and the backfill are arranged around the electrode body as described above, they are damaged because they are housed in the casing of the embedding jig and pushed into the ground. It can be installed in the ground.

Further, in order to achieve the above object, the electrode body burying method according to the present invention comprises the electrode body for electrical protection of the underground underground pipe which is disposed in the ground through the concrete wall from the underground pit, In the method of penetrating and embedding a concrete wall, a through hole forming step of forming a through hole in the concrete wall, a base end portion, a casing portion releasably connected to the base end portion at the rear end, and A jig preparing step of preparing a buried jig provided with a sharpened part detachably connected to a front end of the casing part; loading pressure on the base end part and loading the buried jig from the underground pit through the through hole Placing the electrode body in the casing portion of the embedding jig pressed into the ground, positioning the electrode body in the casing portion, and State is characterized by having a drawing step of leaving the pointed portion, and the electrode body into the ground by pulling the proximal portion and the casing portion.
Such a method of burying the electrode body also makes it possible to place the electrode body at a predetermined position in the ground without damaging the electrode body of a desired form in a state where it can be in direct contact with the soil. It is possible to provide a method of burying an electrode body capable of obtaining an anticorrosion effect of underground underground piping for a long time by preventing an increase in ground resistance in the electrode body for cathodic protection.

In the method for embedding an electrode body according to the present invention, in the electrode body accommodation step, the electrode body, a water-permeable outer surface material accommodating the electrode body, and the electrode body and the outer surface material are filled. Preferably, an electrode assembly having a backfill in which the electrode body is buried is accommodated in the casing portion.
The outer surface of the electrode assembly disposed in the ground can be deformed by such a method of burying the electrode body, and it can be in intimate contact with the surrounding soil to widen the contact area. In addition, since the outer surface material has water permeability and the backfill is filled between the electrode body and the outer surface material, moisture in the ground can permeate the backfill, and the electrode body is surrounded There is no gap formed. And even if the water-permeable outer surface material and the backfill are arranged around the electrode body as described above, they are damaged because they are housed in the casing of the embedding jig and pushed into the ground. It can be installed in the ground.

In the method of embedding an electrode body according to the present invention, after the drawing step, a gap filling step of filling a gap filling backfill in the gap between the electrode body or the electrode complex and the inner wall surface of the soil is provided. May be
According to such a method for embedding the electrode body, backfill can be filled without gaps between the electrode body and the inner wall surface of the surrounding soil, and it is difficult for the electrode body to be in direct contact with the soil. It is easy to ensure the promoting effect of the electrode reaction by the fill.

  In order to achieve the above object, the embedding jig of the electrode assembly according to the present invention has a proximal end capable of axially applying a pressing force into the ground, and a rear end capable of axially disengaging from the proximal end. And a casing portion capable of accommodating the electrode body for preventing the corrosion in the inside, and axially releasably connected to the front end of the casing portion capable of transmitting the pressing pressure in the axial direction, And a pointed portion insertable into the ground.

According to the embedding jig of the electrode body of the present invention, the casing portion axially connected to the base end portion capable of axially applying the indentation pressure to the ground can accommodate the electrode body for corrosion prevention As well as being able to transmit the pressing pressure in the axial direction. In addition, a pointed portion connected to the front end of the casing portion can be inserted into the ground by pressing pressure. Therefore, the electrode body of a desired form can be inserted to a predetermined position in the ground without being damaged by the pressure from the soil, frictional force or the like.
Furthermore, the casing portion capable of accommodating the electrode body is axially releasable from the pointed portion connected to the front end, and is releasable from the proximal end portion connected at the rear end. Therefore, the base end portion and the casing portion can be pulled out in the axial direction in a state where the embedding jig is axially pushed into the ground and the electrode body is disposed at a predetermined position in the ground. The electrode body can be left behind.
As a result, it is possible to place the electrode body in a desired form in a position where it can be in direct contact with the soil without damaging the electrode body in a desired form, and to prevent an increase in grounding resistance in the electrode body for cathodic protection at the beginning of energization Thus, it is possible to provide an electrode assembly burying jig capable of obtaining an anticorrosion effect of underground underground piping for a long time.

  In the electrode body embedding jig of the present invention, the casing portion is filled between the electrode body, a water-permeable outer surface material accommodating the electrode body, the electrode body and the outer surface material. It may be able to accommodate an electrode complex having a backfill.

  According to the embedding jig of such an electrode body, the electrode body is accommodated in the outer surface material of the water base, and the backfill is filled between the electrode body and the outer surface material to bury the electrode body. As it can be accommodated in the casing part in the form of an electrode assembly, it can be arranged at a predetermined position in the ground without damaging the electrode assembly.

  According to the present invention, it is possible to prevent the rise of the ground resistance in the electrode body for cathodic protection at the initial stage of energization and thereby obtain the corrosion protection effect of the underground underground pipe for a long period of time. A method and an embedding jig for an electrode body can be provided.

It is an axial sectional view showing the electrode complex concerning the present invention. It is an axial sectional view of an embedding jig of an electrode body concerning the present invention. It is a side view of the pushing device of the electrode body concerning the present invention. It is a front view of the pressing device of the electrode body which concerns on this invention. It is a flowchart which shows the embedding process of the electrode body which concerns on this invention. It is sectional drawing which shows the state which embed | buried the electrode complex which concerns on this invention in the earth.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[Electrode complex]
In the present embodiment, the electrode body 11 is embedded near the concrete wall of the underground pit in the form of the electrode complex 10. The electrode assembly 10, as shown in FIG. 1, includes an electrode body 11, an outer surface material 12, and a backfill 13a.

  The electrode body 11 is an electrode body for electrolytic protection extending in the axial direction, and made of magnesium, zinc, aluminum various metals or alloys thereof or carbon, metal oxide coated titanium (MMO), platinum plated titanium, high boron iron or the like Become. The electrode body 11 may be a soluble electrode or an insoluble electrode.

The outer surface material 12 is preferably made of a flexible water-permeable cloth. The water-permeable cloth is formed into a sheet from a large number of fibers, and may be woven or non-woven. Further, the outer surface material 12 may be paperboard such as felt or paperboard for paperboard. Paperboard can gain flexibility by the penetration of water in the soil. Thus, the outer surface material 12 may be any material as long as it has water permeability.
It is preferable that the outer surface material 12 can hold the backfill 13a inside. The outer surface material 12 is preferably disposed on the entire outer surface of the electrode body 11, and may be formed, for example, in a bag shape. At this time, it is preferable that the outer surface material 12 have a strength enough to hold the electrode body 11 and the backfill 13a.

  The backfill 13a is made of, for example, bentonite, gypsum, mirabilite, etc. in the case of the soluble electrode body 11, and in the case of the insoluble electrode body 11, coke, graphite or the like may be used. The backfill 13 a is filled between the electrode body 11 and the outer surface material 12. The electrode body 11 is disposed in a state of being buried in the backfill 13a, and the electrode body 11 is not disposed on the surface. The backfill 13 a may be filled also on the outside of the outer surface material 12.

[Burying jig]
As shown in FIG. 2, the embedding jig 15 is made of a hard metal or the like, and has a base end portion 16, a casing portion 17, and a pointed portion 18.
The base end portion 16 is provided with a pressurized portion 16a capable of applying a pressing pressure from a pressing device 20 described later on one side in the axial direction, and a casing on the other side in the axial direction. A fitting projection 16b which can be fitted in the axial direction with the portion 17 and an abutting portion 16c with which the rear end of the casing 17 abuts in the axial direction are provided.

The casing portion 17 has a hollow portion 17a capable of accommodating the electrode assembly 10, and has an axially extending outer shape with a constant cross-sectional shape. The casing portion 17 may be made of, for example, a sturdy steel pipe or the like. Furthermore, if it is hard, it may be nonmetal. For example, rigid vinyl chloride, an acrylic resin, etc. are mentioned.
The rear end of the casing portion 17 is provided with an opening 17b to be fitted to the fitting convex portion 16b of the base end portion 16, and a flat rear end edge can be in contact with the contact portion 16c of the base end portion 16. The casing portion 17 and the proximal end portion 16 are connected in a detachable manner by relative movement in the axial direction.

The front end of the casing portion 17 is provided with an opening 17 c in which the pointed portion 18 is fitted, and the front end is configured to abut on the pointed portion 18.
The casing portion 17 has an axial compressive strength sufficiently larger than the pressing pressure applied to the proximal end portion 16 and can transmit the pressing pressure from the proximal end portion 16 to the pointed portion 18.
The embedding jig 15 of the present embodiment is configured to be able to connect a plurality of casing portions 17 along the axial direction. On the end side of each casing portion 17, a screwing portion 17d screwed and connected is provided. The screwing portion 17d may be a combination of a male screw and a female screw, or may be screwed through a joint or the like.

The pointed portion 18 is provided with a conical or pyramidal conical portion 18a which is tapered toward the front end. At the rear end side, a fitting projection 18b which can be fitted in the axial direction with the casing 17 and an abutting portion 18c with which the flat front end edge of the casing 17 abuts in the axial direction are provided. The pointed portion 18 and the casing portion 17 are connected in a detachable manner by relatively moving in the axial direction.
The pointed portion 18 can be inserted into the ground by the pressing force transmitted from the casing portion 17, and has an axial compressive strength sufficiently larger than the loaded pressing pressure.

[Pressing device]
As shown in FIGS. 3 and 4, the pushing device 20 is disposed in the underground pit, and is a device that pushes the embedding jig 15 into the ground through the through hole 23 a of the concrete wall 23 and inserts it.
The pushing device 20 has a rack 21 fixed to the floor of the underground pit and the concrete wall 23, and a hydraulic jack 22 fixed to the rack 21 and installed toward the concrete wall 23. The hydraulic jack 22 is provided with a pressing portion 22 a that locks the pressure receiving portion 16 a provided at the base end portion 16 of the embedding jig 15 and axially presses in the hydraulic direction.

[Burying method]
Next, a method of embedding the electrode body 11 of the embodiment in the ground by using the embedding jig 15 and the pushing device 20 as described above will be described with reference to FIG.
In this embodiment, the electrode assembly 10 as shown in FIG. 1 is prepared by performing the preparation step S1, the through hole forming step S2, the jig preparation step S3, the pressing step S4, the drawing step S5, and the gap filling step S6. Bury in.

First, in the preparation step S1, the reinforcing bar position is marked on the concrete wall 23 using a reinforcing bar explorer or the like.
In the through hole forming step S 2, coring is performed to form a through hole 23 a in the concrete wall 23. Furthermore, a leading hole is formed in the ground from the through hole 23a. The leading hole may be a hole having a cross-sectional shape smaller than the cross-sectional shape of the casing portion 17 of the embedding jig 15.
In this state, the pushing device 20 according to the size of the embedding jig 15 to be used is installed in the underground pit. The axis of the hydraulic jack 22 of the pushing device 20 is disposed in alignment with the axis of the through hole 23a and the leading hole.

In the jig preparation step S3, as shown in FIG. 2, first, the casing portion 17 is prepared in accordance with the length and the position of embedding of the electrode assembly 10 to be embedded. If necessary, a plurality of casing parts 17 may be screwed together by a screwing part 17d and connected to an appropriate length. The connection of the casing portion 17 may be entirely performed in the jig preparation step S3, but the next casing portion 17 may be connected while sequentially pushing the casing portion 17 on the tip end side in the pressing step described later.
Attach the pointed part 18 to the tip of the casing part 17, attach the base end 16 to be the jig for pushing in at the rear end on the other side, and connect the pointed part 18, the casing 17 and the base end 16 coaxially in the axial direction Connect along.
Then, the electrode assembly 10 including the electrode body 11 as shown in FIG. 1 is accommodated in the hollow portion of the casing portion 17.

In the pressing step S4, the sharpened portion 18 is faced to the through hole 23a of the concrete wall 23, and the embedding jig 15 is attached to the pressing device 20 as shown in FIG. 3 and FIG. At this time, the axis of the hydraulic jack 22 and the axis of the embedding jig 15 are aligned.
In this state, by applying pressing pressure to the base end portion 16 of the embedding jig 15 in the axial direction by the hydraulic jack 22 of the pushing device 20, the embedding jig 15 is passed from the underground pit through the through hole 23a from the sharpened portion 18 side. Push it into the ground. When the electrode assembly 10 is inserted to a deep position in the ground, the casing portion 17 may be inserted while being sequentially connected in the axial direction.
When the electrode assembly 10 has reached a predetermined position in the ground, the pressing process is ended.

In the drawing step S5, the base end portion 16 and the casing portion 17 are drawn from the embedding jig 15 in the axial direction using a hydraulic pipe drawing machine or the like. When a plurality of casing parts 17 are connected by screwing parts 17 d, the casing parts 17 are pulled out while disassembling one by one.
Thereby, as shown in FIG. 6, the sharp tip 18 and the electrode assembly 10 are left in the ground, and the base end 16 and the casing 17 are separated from the electrode assembly 10 and removed from the through hole 23a.

In the gap filling step S6, the gap filling backfill 13b is thereafter filled in the gap between the electrode assembly 10 and the inner wall surface of the soil to produce the space between the electrode composite 10 and the inner wall surface of the soil. Thus, the degree of adhesion of the electrode assembly 10 to the soil can be improved.
The gap filling backfill 13b may be the same as or different from the backfill 13a. Here, the one having a larger amount of water and higher fluidity than the backfill 13a is used.

  Thereafter, in the water blocking step S7, a water blocking material 25 composed of a pouring type self-swelling waterproofing agent and a flame retardant mortar is filled in the place where the concrete wall 23 is drilled. Further, the hole for drilling is subjected to water blocking treatment by the rubber packing 26 and the flange 27.

Thus, as shown in FIG. 6, the electrode assembly 10 can be buried in the ground near the underground buried pipe P.
Then, by electrically connecting the electrode body 11 of the electrode complex 10 disposed in the ground and the underground buried pipe P disposed in the ground through the concrete wall 23 with the lead wire 28 , The electric protection of the underground buried pipe P can be carried out.
In addition, in the case of the insoluble electrode body 11, by applying a predetermined voltage between the electrode body 11 and the underground underground pipe P, the electric corrosion protection of the underground underground pipe P can be performed.

  Further, in the case of the soluble electrode body 11, the electrode assembly 10 having the new electrode body 11 is prepared before the electrode body 11 is dissolved by continuing the electric protection of the underground buried pipe P, and the above-mentioned By performing such a process, the corrosion protection of the underground buried pipe P can be continued.

[Function effect]
The electrode assembly 10 used in the embodiment as described above includes the electrode assembly 11, the water-permeable outer surface material 12 containing the electrode assembly 11, and the electrode assembly 11 and the outer surface material 12. And a backfill 13a filled in between and buried in the electrode body 11.
Therefore, in the state where the electrode complex 10 is buried in the ground, water such as ground water which is an electrolyte solution can easily permeate the outer surface material 12 and can sufficiently penetrate the backfill 13a. As a result, it is possible to prevent the formation of the insulating coating of the metal oxide as in the case where the electrode body 11 is accommodated and disposed inside the metal cylindrical container.

  As a result, it is possible to prevent the reduction of the effective area of the anode by the insulating coating. In addition, when the water permeates into the backfill 13a filled between the electrode body 11 and the outer surface material 12, the actual anode area is increased. Therefore, the ground resistance can be reduced, the corrosion current can be conducted at a low voltage, and the problem that the ground resistance rises sharply at the initial stage of the current as in the prior art does not occur.

  According to the embedding jig 15 of the electrode body 11 of the present embodiment, the casing portion 17 axially connected to the base end portion 16 in which the pressing force into the ground can be loaded in the axial direction is an electrode for cathodic protection It is capable of accommodating an electrode assembly 10 comprising a body 11 and capable of transmitting an indentation pressure in the axial direction. Further, a pointed portion 18 connected to the front end of the casing portion 17 can be inserted into the ground by a pressing pressure. Therefore, the electrode body 11 of a desired form can be inserted to a predetermined position in the ground without being damaged by the pressure from the soil, the frictional force or the like.

  Furthermore, a casing portion 17 capable of containing the electrode assembly 10 including the electrode body 11 is axially separable from the pointed portion 18 connected to the front end, and axially formed with the proximal end 16 connected at the rear end. It is possible to leave. Therefore, the base end portion 16 and the casing portion 17 can be pulled out in the axial direction while the embedding jig 15 is axially pushed into the ground and the electrode assembly 10 is disposed at a predetermined position in the ground. The sharpened portion 18 and the electrode assembly 10 can be left in the inside.

And according to the embedding method of the electrode body 11 of this embodiment, since such an embedding jig is used, in jig preparation process S3 and pushing-in process S4, it receives damage from pressure, frictional force, etc. from soil. Instead, the electrode assembly 10 including the electrode body 11 of a desired form can be inserted to a predetermined position in the ground.
Further, in the drawing step S5, by pulling out the base end portion 16 and the casing portion 17, the electrode complex 10 provided with the sharpened portion 18 and the electrode body 11 can be left behind in the ground. The electrode assembly 10 can be naturally left in the ground without pulling out the sharpened portion 18. On the other hand, by pulling out the casing portion 17, the electrode complex 10 accommodated in the casing portion 17 can be exposed and disposed so as to be able to contact the soil sufficiently.

  Therefore, it is possible to arrange in a state in which it can be in direct contact with the soil directly at a predetermined position in the ground without damaging the electrode body 11 in a desired form (for example, the form of the electrode complex 10). It is possible to provide a method of burying the electrode body 11 capable of obtaining the anticorrosion effect of the underground buried pipe for a long time by preventing the rise of the ground resistance in the electrode body 11 for the cathodic protection.

  In the embedding method and the embedding jig 15 of the electrode body 11 of the present embodiment, the electrode body 11 is accommodated in the water-permeable outer surface material 12 in the jig preparation step S3, and the electrode body 11 and the outer surface material 12 are It can be accommodated in the casing portion 17 of the embedding jig 15 in the form of the electrode assembly 10 in a state in which the backfill 13a is filled and the electrode body 11 is buried.

Therefore, the outer surface of the electrode assembly 10 disposed in the ground is deformable, and can be in intimate contact with the surrounding soil to widen the contact area. Also, since the outer surface material 12 has water permeability and the backfill 13a is filled between the electrode body 11 and the outer surface material 12, moisture in the ground can permeate the backfill 13a, and the electrode No gap is formed around the body 11.
And, even if the water-permeable outer surface material 12 is used in this manner and the backfill 13a is filled around the electrode body 11, it is accommodated in the casing portion 17 of the embedding jig 15 and is underground It is not damaged as it is pushed into the

  In the method of burying the electrode body 11 of the present embodiment, the gap filling step S6 of filling the gap filling backfill 13b in the gap between the electrode assembly 10 including the electrode body 11 and the inner wall surface of the soil after the drawing step S5. As a result, the backfill 13b for gap filling can be filled without gaps between the electrode assembly 10 and the inner wall surface of the surrounding soil, resulting in a region where the electrode assembly 10 is in direct contact with the soil. It is difficult to secure the promoting effect of the electrode reaction by the backfill 13a.

As mentioned above, although one Embodiment was described about the embedding method and the embedding jig | tool 15 of the electrode body 11 by this invention, this invention is not limited to said embodiment, It changes suitably in the range which does not deviate from the meaning. It is possible.
For example, although the example which accommodated the electrode body 11 in the casing part 17 of the embedding | flush-mounting jig | tool 15 in the form of the electrode complex 10 and inserted it in the earth was demonstrated above, it does not specifically limit. For example, it can be accommodated in the form of the electrode body 11 alone in the casing portion 17 of the embedding jig 15 and disposed in the ground as in the embodiment. In that case, the gap filling backfill 13b may be filled between the electrode body 11 alone and the inner wall surface of the soil.

  Moreover, although the example which accommodates the electrode assembly 10 in the hollow part of the casing part 17 was demonstrated above in jig | tool preparatory process S3, it is not specifically limited. For example, the electrode assembly 10 is not accommodated in the hollow portion of the casing portion 17 in the jig preparation step S3, and is accommodated in the hollow portion of the casing portion 17 after the pushing step S4 and before the withdrawal step S5. It may be (electrode body accommodation process). Even with such a method, the electrode body 11 of a desired form can be inserted to a predetermined position in the ground without being damaged by the pressure from the soil, friction, or the like.

DESCRIPTION OF SYMBOLS 10 ... Electrode complex 11 ... Electrode body 12 ... Outer surface material 13a ... Backfill 13b ... Clearance filling backfill 15 ... Embedding jig 16 ... Base end part 16a ... Press-fit part 16b ... Fitting convex part 16c ... Contact Contact portion 17: Casing portion 17a: Hollow portion 17b, 17c: Opening 17d: Screwing portion 18: Sharp portion 18a: Conical portion 18b: Fitting convex portion 18c: Contact portion 20: Pushing device 21: Frame 22: Hydraulic pressure Jack 22a: Pressed portion 23: Concrete wall 23a: Through hole 25: Water blocking material 26: Rubber packing 27: Flange 28: Lead wire S1: Preparation step S2: Through hole forming step S3: Jig preparation step S4: Pushing step S5 ... Drawing-out process S6 ... Gap filling process S7 ... Water stopping process P ... Underground underground piping

Claims (10)

It is a form of embedding of an electrode body for electrical protection of underground underground piping which penetrates a concrete wall from an underground pit and is disposed in the ground,
A backfill is filled between the inner wall of the soil and
Embedding form of electrode body. An electrode composite comprising: the electrode body, a water-permeable outer surface material containing the electrode body, and a backfill filled between the electrode body and the outer surface material to embed the electrode body. Buried in form
A backfill is filled between the outer surface material and the inner wall surface of the soil,
The embedding form of the electrode body of Claim 1. In the method of burying the concrete wall through the concrete wall, the electrode body for electric protection of the underground underground pipe disposed in the ground penetrating the concrete wall from the underground pit is embedded,
A through hole forming step of forming a through hole in the concrete wall;
In the casing portion in the embedding jig provided with a proximal end portion, a casing portion releasably connected to the proximal end portion at the rear end, and a sharp portion releasably connected to the front end of the casing portion A jig preparation step for housing the electrode body;
A pressing step of applying pressing pressure to the base end portion and pressing the embedding jig from the underground pit through the through hole into the ground;
A drawing step of drawing the base end portion and the casing portion and leaving the sharpened portion and the electrode body in the ground, with the electrode body positioned in the casing portion;
A method of embedding an electrode body, comprising:   In the jig preparing step, the electrode body, a water-permeable outer surface material accommodating the electrode body, and a backfill which is filled between the electrode body and the outer surface material and the electrode body is buried. A method of embedding an electrode assembly according to claim 3, characterized in that the electrode assembly having the above is accommodated in the casing portion. In the method of burying the concrete wall through the concrete wall, the electrode body for electric protection of the underground underground pipe disposed in the ground penetrating the concrete wall from the underground pit is embedded,
A through hole forming step of forming a through hole in the concrete wall;
Jig preparation process for preparing a buried jig comprising a base end, a casing part releasably connected to the base end at the rear end, and a sharp part releasably connected to the front end of the casing part When,
A pressing step of applying pressing pressure to the base end portion and pressing the embedding jig from the underground pit through the through hole into the ground;
An electrode body accommodating step of accommodating the electrode body in the casing portion of the embedding jig pushed into the ground;
A drawing step of drawing the base end portion and the casing portion and leaving the sharpened portion and the electrode body in the ground, with the electrode body positioned in the casing portion;
A method of embedding an electrode body, comprising:   In the electrode body accommodation step, the electrode body, a water-permeable outer surface material accommodating the electrode body, and a backfill which is filled between the electrode body and the outer surface material and the electrode body is buried. A method of embedding an electrode assembly according to claim 5, characterized in that the electrode assembly having the above is accommodated in the casing portion.   The electrode according to claim 3 or 5, further comprising a gap filling step of filling a gap filling backfill in the gap between the electrode body and the inner wall surface of the soil after the drawing step. How to bury the body.   The method according to claim 4 or 6, further comprising a gap filling step of filling a gap filling backfill in a gap between the electrode complex and the inner wall surface of the soil after the drawing step. Method of embedding the electrode body. A proximal end capable of axially applying an indentation pressure to the ground;
A casing portion axially releasably connected to the base end portion at the rear end, capable of accommodating an electrode body for preventing corrosion inside, and capable of transmitting the pressing pressure in the axial direction;
An embedding jig for an electrode body, comprising: a tip portion axially connected to a front end of the casing portion so as to be detachable in the axial direction and capable of being inserted into the ground by the pressing pressure. The casing portion accommodates an electrode complex having the electrode body, a water-permeable outer surface material containing the electrode body, and a backfill filled between the electrode body and the outer surface material. The embedding jig of the electrode body according to claim 9, characterized in that it is possible.

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