JP2010138686A - Electrode for electric protection and method for burying the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrode having a configuration easily burying the electrode and having an excellent workability when the electrode is buried for carrying out an electric protection method to a concrete structure and not disturbing filling in a grouting or the like and a method for burying the electrode. <P>SOLUTION: The electrode for the electric protection is buried for carrying out the electric protection method to the concrete structure. In the electrode for the electric protection, a band-shaped body is bent and formed in the cross direction so that a length in the cross direction is shrunk by an elastic deformation. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electrode for anticorrosion of a concrete structure and a method for embedding the electrode.

2. Description of the Related Art Conventionally, an anticorrosion method is known as a method for reinforcing steel bars in concrete structures. The cathodic protection method is to prevent corrosion of reinforcing bars by embedding an anticorrosive electrode made of titanium or the like on the surface of a concrete structure and energizing with the cathodic protection electrode as an anode and the reinforcing bar as a cathode. .
Usually, as the anode of the anticorrosion electrode, a long electrode formed in the shape of a rod or a strip is used, and this long electrode is installed inside a groove provided in a concrete structure. The electrode is embedded in the concrete structure by filling it with plastering or grouting.

However, when the groove for embedding the electrode is open sideways or downward, that is, when it is intended to embed the electrode in a concrete surface such as a ceiling or wall, the electrode is removed from the groove until grout is injected. There is a problem that workability is poor because it is necessary to temporarily fix the electrode inside the groove so as not to fall. In particular, when an electrode is installed on an inaccessible concrete surface that requires a scaffold, an aerial work vehicle or the like, such a problem becomes even more remarkable.

In addition, a method of temporarily fixing the electrode inside the groove by using some kind of stopper is conceivable, but the stopper installed inside the groove hinders grout injection and the like, and the inside of the groove is poorly filled (void). There is a risk of causing.

Therefore, in view of the problems of the prior art as described above, when embedding an electrode for applying an anticorrosion method to a concrete structure, the present invention is easy to embed the electrode and has excellent workability. An object of the present invention is to provide an electrode for electrode protection that does not interfere with grout injection and the like, and to provide a method for burying an electrode for electrode protection excellent in workability and in filling properties.

The present invention is an electrode for an anticorrosion embedded in order to apply an anticorrosion method to a concrete structure, and is formed by bending a band-like body in the width direction so that the length in the width direction can be contracted by elastic deformation. An electrode for cathodic protection is provided.
As a preferable form of the electrode for cathodic protection according to the present invention, one having a substantially V-shaped or substantially U-shaped cross-section in the width direction can be mentioned.

According to the electrode for electrode protection according to the present invention, when the electrode for electrode protection is installed inside a groove formed in a concrete structure, the electrode itself can be elastically deformed to reduce the length in the width direction. Therefore, a frictional force is generated between the inner surface of the groove by the elastic force (repulsive force) of the electrode itself, and the electrode can be held inside the groove without using a stopper or the like.

Moreover, the electrode for cathodic protection according to the present invention is preferably such that the strip is formed in an expanded metal shape, and the stretching direction when the strip is formed in an expanded metal shape is the longitudinal direction of the strip. It shall be comprised so that it may become.
If the belt-like body is formed in an expanded metal shape and the stretching direction at that time is configured to be the longitudinal direction of the belt, it becomes easy to roll the long electrode into a coil shape and handleability In addition, it becomes difficult to bend in the width direction, and when inserted into the groove, the groove and the electrode are rubbed firmly to fix the electrode more securely inside the groove. Is possible.

In addition, the electrode for cathodic protection according to the present invention is preferably formed in a central portion in the width direction such that a curved portion having a substantially V-shaped or substantially arc-shaped cross section in the width direction protrudes outward. It shall be.
By using an electrode for cathodic protection formed so that a curved section having a substantially V-shaped cross section or a substantially arc-shaped cross section protrudes outward at the center in the width direction, the substantially V-shaped or The electrode is easily guided to the inside of the groove through the tip of the substantially arc-shaped curved portion, and the embedding operation of the electrode for corrosion protection is further facilitated.

Further, the present invention is a method of embedding an electrode for an anticorrosion so as to apply an anticorrosion method to a concrete structure, and as the electrode for an anticorrosion, the length in the width direction can be contracted by elastic deformation. While using the electrode for electrocorrosion formed by curving a band-like body in the width direction, forming a groove narrower than the width of the electrode for anticorrosion in the concrete structure, the electrode for anticorrosion is arranged in the width direction. A method for embedding an electrode for anticorrosion is provided, wherein the electrode is inserted into the groove while being contracted.

  According to the method for installing an electrode for electro-corrosion according to the present invention, the electrode for anti-corrosion is used in which the strip is curved in the width direction so that the length in the width direction can be contracted by elastic deformation, and concrete is used. By inserting the electrode for anticorrosion into the narrow groove formed in the structure while being contracted in the width direction, the elastic force (repulsive force) between the electrode itself and the groove inner surface is used. Thus, there is an effect that the frictional force is generated and the electrode can be prevented from falling off without using a stopper or the like.

  In addition, since the electrode is curved in the width direction, the depth of the groove formed in the concrete structure can be reduced as compared with the case where a flat electrode that is not curved is used. There is an effect that the reinforcing bars in the structure can be prevented from being exposed and the electrodes and the reinforcing bars coming into contact with each other. Further, as described above, by forming the electrode in a shape curved in the width direction, there is an effect that the depth of the groove can be reduced and the thickness of the mortar filled on the electrode can be sufficiently secured.

  Further, the present invention is a method of embedding an electrode for an anticorrosion so as to apply an anticorrosion method to a concrete structure, and as the electrode for an anticorrosion, the length in the width direction can be contracted by elastic deformation. An electrode for cathodic protection formed with a band-shaped body curved in the width direction is used, and a groove narrower than the electrode for cathodic protection is formed in the concrete structure, and a grout material is formed inside the groove. A part of the electrode is inserted into the groove while shrinking the electrode for electrode protection in the width direction, and the rest of the grout material is inserted into the groove. An electrode embedding method is provided.

  According to the method for installing the electrode for anticorrosion according to the present invention, as described above, a frictional force is generated between the inner surface of the groove by the elastic force (repulsive force) of the electrode itself, and the electrode can be used without using a stopper or the like. The electrode can be prevented from falling off, and at the same time, the grout material is placed before and after the insertion of the electrode, so that the grout material can be filled very well. In other words, a part of the grout material is placed inside the groove, and the electrode for anticorrosion is inserted into the groove while shrinking in the width direction from above, so that the grout material previously placed can be obtained. Since the electrodes are pushed into the back and corners of the groove, the filling property in the groove is further enhanced.

Moreover, this invention provides the embedding method of the said electrode for cathodic protection which the said strip | belt shaped object is formed in the expanded metal form. If the strip constituting the electrode is formed in an expanded metal shape, the electrode has a large number of mesh-like through holes, so that the grout material can move through the through holes. . Therefore, for example, as described above, a part of the grout material is placed inside the groove, and when the electrode for anticorrosion is inserted into the groove while being contracted in the width direction, it is placed first. When the amount of the grout material is large, the grout material moves to the opposite side of the electrode through the through hole, so that the electrode can be easily inserted to a predetermined depth.
In addition, when the grout material is filled after the electrode is inserted to the back of the groove, the grout material spreads to the lower side of the electrode, and the filling property is improved.

  Furthermore, the present invention provides the electric protection device using a pressing jig provided with a pressing portion for pressing the electrode for electrode protection into the inside of the groove and a restricting portion for restricting the reaching distance of the pressing portion to the inside of the groove. An edible electrode is inserted into a groove, and the bottom of the groove and the electrode for anticorrosion are installed separately from each other.

  According to such a method, even if the reinforcing bar of the concrete structure is exposed when the groove is formed by arranging the bottom of the groove and the electrode for anticorrosion apart from each other, A short circuit between the reinforcing bar and the electrode for anticorrosion can be prevented. Moreover, since a space is formed between the bottom of the groove and the electrode for anticorrosion by installing the bottom of the groove and the electrode for anticorrosion, grout materials such as mortar and cement paste are used. It becomes easy to flow and the filling property becomes good.

  As described above, according to the electrode for anticorrosion and the embedding method thereof according to the present invention, it becomes easy to embed an electrode for applying an anticorrosion method to a concrete structure, and the workability is greatly improved, and the grout material It is difficult to prevent injection and has an effect of improving the filling property.

(A) is the perspective view which showed a part of one Embodiment of the electrode for cathodic protection based on this invention, (b) is the sectional drawing, (c) is the side view. The schematic sectional drawing which showed one Embodiment of the installation method of the electrode for cathodic protection which concerns on this invention. Sectional drawing which showed other embodiment of the electrode for cathodic protection based on this invention. (A) The front view which showed the roller 5 which is an example of the pushing jig | tool used when installing an electrode. (B) A side view of the roller 5. Schematic which showed the process which installs the electrode 1 for anticorrosion in the bottom of a groove | channel using the roller 5 shown in FIG. (A) The front view which showed roller 5 'which is another example of the pushing jig | tool used when installing an electrode. (B) The side view of this roller 5 '. Schematic which showed the process which installs the electrode 1 for cathodic protection in the bottom of a groove | channel using roller 5 'shown in FIG. 6 in one Embodiment of the embedding method of the electrode for cathodic protection. Sectional drawing which shows the state by which the electrode for cathodic protection was embed | buried in the groove | channel formed in the concrete structure. Sectional drawing which showed the outline | summary for every process about other embodiment of the embedding method of the electrode for cathodic protection.

Hereinafter, the electrode for anticorrosion according to the present invention and the installation method thereof will be described in detail with reference to the drawings.
FIG. 1 is a schematic view showing an embodiment of an electrode for cathodic protection according to the present invention. As shown in FIG. 1, the electrode 1 for anticorrosion according to the present embodiment is composed of a long band-shaped metal body having a mesh, and the metal body has a shape curved in the width direction (short direction). ing. Specifically, the electrode 1 is processed into an expanded metal shape, and each hole constituting the mesh is stretched when processed into an expanded metal shape as shown in FIG. It has a rhombus shape that is sometimes formed.

Moreover, the electrode 1 for anticorrosion of this embodiment is comprised so that the longitudinal direction of this electrode may become the extending | stretching direction of the metal body at the time of processing into an expanded metal shape. The metal body processed into an expanded metal shape has a characteristic that it is relatively easy to bend with respect to the stretching direction at the time of manufacture, and is relatively difficult to bend in a direction orthogonal to the stretching direction. Therefore, by configuring the stretching direction to be the longitudinal direction, the longitudinal direction becomes relatively excellent in flexibility. For example, a long electrode is wound in a coil shape, stored, transported, and installed. Thus, the handleability of the electrode for anticorrosion can be improved.
Also, since the direction perpendicular to the stretching direction is the width direction, the groove and the electrode are rubbed firmly after being inserted into the groove while shrinking the length in the width direction (that is, the electrode width). Thus, the electrode can be more reliably fixed inside the groove.

  The expanded metal shape refers to the expanded metal shape defined in JIS G 3351 or a shape similar thereto.

  As shown in FIG. 1B, the electrode 1 for cathodic protection according to the present embodiment is configured in a curved state so that the cross section in the width direction (short direction) is substantially U-shaped. Specifically, a curved portion 11 that is curved in an arc shape at the center in the short direction and protrudes downward, and a pair of side wall portions 12 and 12 that extend linearly upward from both sides of the curved portion. It consists of and.

  With the electrode 1 for anticorrosion having such a configuration, the arcuate curved portion 11 is further curved by applying a compressive force from both sides in the width direction, and as a result, the pair of side wall portions 12 and 12 are inclined inward. In order to deform so that the length in the width direction contracts, it can be installed while being pushed into a groove narrower than the width of the electrode. And since the electrode 1 inserted in the inside of a groove | channel will be in the state shrunk in the width direction by elastic deformation, the side surface of a groove | channel is pressed with the restoring force. Specifically, the side walls of the electrode for anticorrosion press the side surface of the groove, and the electrode for anticorrosion is held inside the groove by a frictional force generated between the electrode and the groove.

  The material of the electrode for anticorrosion according to the present invention is not particularly limited, and as described above, any electrode material that can be elastically deformed in a curved state can be used. Specifically, platinum-plated titanium electrodes, high silicon cast iron electrodes, graphite electrodes, ferrite electrodes, metal oxide electrodes, or the like can be used.

  In addition, the dimensions of the electrode for cathodic protection can be appropriately determined depending on the condition of the concrete structure on which the cathodic protection method is implemented, the conditions for the cathodic protection method being implemented, and the like. Specifically, the length in the width direction is several mm to several cm, the length in the longitudinal direction is several cm to several m, and the height is several mm to several cm. .

Next, an embodiment of the method for embedding the electrode for anticorrosion according to the present invention will be described by taking as an example the case where the electrode for anticorrosion 1 of the above embodiment is used.
FIG. 2 is a schematic view showing a method for installing an electrode for cathodic protection according to the embodiment. As shown in FIG. 2, first, a groove 3 narrower than the width of the electrode 1 for cathodic protection is formed in the concrete structure 2. Specifically, it is preferable to form a groove having a width of about 0.8 to 0.9 times the width of the electrode for cathodic protection. For example, if the width of the electrode for cathodic protection is 10 mm, The width of the groove is preferably 8 to 9 mm.
The groove 3 can be formed using, for example, a concrete cutter, and a plurality of grooves 3 can be formed as necessary.

  Further, the depth of the groove 3 is not particularly limited, and the electrode 1 is accommodated in the electrode by containing the electrode 1 for anticorrosion as described above and filled with a grout material such as mortar or cement paste. Any depth can be used as long as 3 can be embedded. In particular, from the viewpoint of sufficiently securing the thickness of the grout material and more reliably embedding the electrode 1, it is preferable that the depth be about 5 to 15 mm larger than the height of the electrode 1.

After the groove having such dimensions is formed, the electrode 1 having the above structure is inserted into the groove 3 as shown in FIGS. When inserting, the electrodes 1 are sequentially inserted along the longitudinal direction while elastically deforming the electrode 1 in the width direction and contracting the length in the width direction. As a means for inserting the electrode 1, there are a method of pushing in by hand, a method of pushing in the electrode through a pushing jig, and the like.
As the pushing jig, for example, as shown in FIG. 4, a wheel 5a having a width that can be inserted inside the electrode 1 curved in a U-shape (that is, between the side wall portion 12 and the side wall portion 12), A roller 5 having a handle 5b can be used. By using the roller 5, as shown in FIG. 5, the electrode 1 is placed on the top of the groove 3, the wheel 5a is inserted inside the electrode 1 and pressed against the bottom of the groove 3, By moving in the longitudinal direction of the groove, the electrode 1 can be sequentially installed on the bottom of the groove 3.

  Moreover, since the electrode 1 for cathodic protection according to the present embodiment includes an arc-shaped curved portion 11 that protrudes downward at the center in the width direction, the curved portion 11 is used when inserted into the groove. Since the electrode 1 is sequentially guided into the groove 3, even when the electrode 1 is pressed with a relatively strong force, the electrode 1 is not easily detached from the groove 3, and the insertion operation is easy.

  As shown in FIG. 2C, the inserted electrode 1 is housed inside the groove 3 in a state of being elastically deformed and contracted in the short direction, that is, the side walls 12 and 12 are sandwiched from both sides of the groove 3. It will be in the state.

After that, as shown in FIG. 2D, the grout material 4 is filled into the groove 3. In this embodiment, since the electrode 1 for cathodic protection is formed in a U shape in the cross section in the short direction, the grout material 4 to be filled is quickly filled into the inside of the U shape electrode 1. The Rukoto.
Moreover, according to the electrode 1 for cathodic protection according to the present embodiment, the electrode 1 is formed with a mesh, so that the injected grout material 4 can be quickly transferred to the back side of the electrode 1 through the mesh. Thus, the entire groove 3 is easily filled with the grout material 4.

  In addition, although the said embodiment demonstrated the electrode for cathodic protection whose cross-sectional shape of a transversal direction is U shape, this invention is not limited to such a cross-sectional shape, For example, Fig.3 (a ), As shown in FIG. 3 (b), as shown in FIG. 3 (b), or as shown in FIG. 3 (c). There may be.

Moreover, in the said embodiment, although the case where the expanded metal-like metal body was bent was demonstrated as an example, this invention is not limited to such a structure, What was comprised using arbitrary metal bodies Can be used.
As an example of the metal body, a punching metal-like metal body, any other metal mesh-like metal body can be used, and a metal flat plate can also be used.

  Moreover, even if it is a case where an expanded metal-like metal body is employ | adopted, it is not limited to the case where a longitudinal direction is made into an extending direction, What uses the width direction as an extending direction can also be used. When the width direction is the extending direction, the electrode is easily deformed in the width direction, so that there is an effect that the electrode can be easily inserted into the groove.

  Further, in the embedding method of the above embodiment, the case where the electrode for anticorrosion is installed at the bottom of the groove has been described. However, as another embodiment of the embedding method according to the present invention, the electrode for anticorrosion is used as the bottom of the groove. There can be mentioned a method of installing them apart. In this case, it is preferable to use a pushing jig provided with a pushing portion for pushing the electrode for cathodic protection into the groove and a restricting portion for restricting the reaching distance of the pushing portion into the groove.

Specifically, as the pushing jig, by reducing the diameter of the wheel 5a of the roller 5 shown in FIG. 4 above, the wheel 5a functions as the pushing portion, and the pivoting portion pivotally supports the wheel 5a. The thing which made 5c function as the said control part can be mentioned.
As another type of pushing jig, for example, as shown in FIG. 6, a narrow central portion 5 d that functions as a pushing portion that comes into contact with the electrode 1 for the anticorrosion and pushes the electrode 1 into the groove 3. And a roller 5 ′ having a wheel 5a having a wide side portion 5e that limits the distance that the central portion 5d can reach the inside of the groove 3 by being formed wider than the width of the groove 3 You can also

When the electrode 1 for anticorrosion is inserted into the groove 3 by using the roller 5 'having such a configuration, for example, as shown in FIG. Accordingly, the electrode 1 for cathodic protection can be installed in a state where it is floated from the bottom of the groove 3.
By installing the electrode 1 for anticorrosion in such a state, a sufficient space is formed between the bottom of the groove 3 and the electrode 1 for anticorrosion. The grout material 4 to be flowed easily flows between the electrode 1 and the bottom of the groove, and the filling state of the groove 3 is improved as shown in FIG. Further, even when the reinforcing bar in the concrete structure 2 is exposed when the groove 3 is formed in the concrete structure 2 using a concrete cutter or the like, as shown in FIG. There is an effect that the anticorrosion electrode is sufficiently insulated and short circuit can be prevented.

  In addition, the method of embedding the electrode for anticorrosion according to the present invention includes forming a groove narrower than the width of the electrode for anticorrosion having the above-described structure in a concrete structure, and forming a grout material inside the groove. The electrode may be inserted into the groove while being deformed in the width direction, and the remaining portion of the grout material may be driven into the groove.

  Specifically, for example, as shown in FIG. 9, an amount of grout material 4 having a depth of about ½ from the bottom of the groove 3 formed in the concrete structure 2 is previously placed (FIG. 9). (A)) Then, using the roller 5 ′ having the above-described configuration, the electrode 1 for anticorrosion is installed near the center of the groove in the depth direction (FIG. 9B), and the grout material 4 is again placed from above. By doing so, you may make it embed | buy the electrode 1 for anticorrosion.

  In this case, when installing the electrode 1 for the anticorrosion, it is preferable to install the electrode 1 while pressing the grout material 4 previously placed through the electrode 1 for the anticorrosion. By doing so, the grout material 4 can be filled densely without generating a gap to the corner of the groove 3.

  Further, if the electrode 1 for cathodic protection is formed by bending an expanded metal-like metal body as described above, the electrode 1 has a large number of through holes, so that it was previously placed. When the amount of the grouting material 4 is large, a part of the grouting material 4 overflows to the upper side of the electrode 1 through the through-hole, so that it does not hinder the installation of the electrode 1. Since the grout material 4 is filled to the inside, the adhesion between the electrode 1 for anticorrosion and the grout material 4 is improved, and there is an effect that the electrical conductivity with the concrete structure is further improved.

1, 1 'Electrodes for anticorrosion 2 Concrete structure 3 Groove 4 Grout material 5, 5' Pushing jig (roller) for electrode installation
6 Grout injection jig 11 Bent part 12 Side wall part

Claims (8)

  An electrode for an anticorrosion that is embedded in order to apply an anticorrosion method to a concrete structure, and that the belt-like body is formed to be curved in the width direction so that the length in the width direction can be contracted by elastic deformation. An electrode for cathodic protection.   The electrode for cathodic protection according to claim 1, wherein the cross-sectional shape in the width direction is substantially V-shaped or substantially U-shaped.   The band-shaped body is formed in an expanded metal shape, and the stretching direction when formed in an expanded metal shape is configured to be the longitudinal direction of the band-shaped body. The electrode for cathodic protection according to 2.   The width direction center part is formed so that the curved part of width direction cross-sectional shape may be protruded toward the outward in the substantially V shape or a substantially circular arc shape. The electrode for anticorrosion as described in 2. A method of embedding an electrode for anticorrosion to apply an anticorrosion method to a concrete structure,
As the electrode for cathodic protection, an electrode for cathodic protection in which a band-like body is curved in the width direction so that the length in the width direction can be contracted by elastic deformation is used. Form a groove narrower than the width of the electrode,
A method of embedding an electrode for an anticorrosion, wherein the electrode for an anticorrosion is inserted into the groove while being contracted in the width direction. A method of embedding an electrode for anticorrosion to apply an anticorrosion method to a concrete structure,
As the electrode for cathodic protection, an electrode for cathodic protection in which a band-like body is curved in the width direction so that the length in the width direction can be contracted by elastic deformation is used. Forming a groove narrower than the width of the electrode, placing a part of the grout material inside the groove, inserting the electrode for anticorrosion into the groove while deforming in the width direction, A method of embedding an electrode for cathodic protection, wherein the remainder of the grout material is cast in a groove.   The method for embedding an electrode for cathodic protection according to claim 5 or 6, wherein the belt-like body is formed in an expanded metal shape.   The electrode for anticorrosion is inserted into the groove by using a pressing jig provided with a pushing portion for pushing the electrode for cathodic protection into the groove, and a restricting portion for restricting the reach of the pushing portion to the inside of the groove. 8. The method for embedding an electrode for anticorrosion according to any one of claims 5 to 7, wherein the electrode is inserted into the electrode, and the bottom of the groove and the electrode for anticorrosion are set apart from each other.

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