JP2017179526A - Corrosion suppression structure of concrete structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a corrosion suppression structure of a concrete structure capable of performing construction from the floor plate underside, in a corrosion suppression method by a galvanic anode method, arranging a proper amount of anode to a reinforcement, and mounting or replacing easily a galvanic anode.SOLUTION: A corrosion suppression structure includes anode installation holes 3, 3, etc., opened on a surface 1a on the separated side from a corrosion suppression steel material 2 of a concrete part 1, a filling body 4 fitted into the anode installation hole 3, and a galvanic anode 5 buried in the filling body 4. The galvanic anode 5 is inserted into the deep side of the anode installation hole 3, and a current is supplied to the corrosion suppression steel material 2 by utilizing a potential difference between the galvanic anode 5 and the corrosion suppression steel material 2, to thereby suppress corrosion of a reinforced concrete floor plate 1.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a corrosion-inhibiting structure for a concrete structure in which steel materials such as reinforced concrete floor slabs and box girders that constitute elevated roads, bridges, etc., and reinforcing bars such as box culverts embedded in the ground are embedded.

  For example, it has a thick concrete part in which steel materials such as reinforcing bars are embedded, such as a reinforced concrete floor slab that forms an elevated road or a bridge, a web part of a concrete box girder, and a box culvert that forms an underground structure. In concrete structures, internal steel materials may corrode due to the neutralization of concrete, the salt content of the concrete material, the incoming salt content from the outside and the effects of antifreezing materials (salt damage), leading to deterioration of the concrete structure. is there.

  Conventionally, as a countermeasure against corrosion of steel materials such as rebars, there is known a method of suppressing corrosion of steel materials such as rebars (hereinafter referred to as corrosion-inhibited steel materials) by supplying current to the steel materials. Depending on the supply method, it is roughly divided into an external power supply method and a galvanic anode method.

  In the external power supply system, an insoluble anode made of titanium or the like is installed on the concrete surface or inside the concrete, a DC power supply device is connected between the insoluble anode and the reinforcing bar that forms the cathode, and current is supplied to the reinforcing bar from the insoluble anode. However, since the amount of current can be adjusted and the long-term anticorrosion property is excellent, it has been conventionally used in the anticorrosion method for reinforced concrete structures.

  However, this type of anticorrosion construction method using an external power supply system requires an external power supply device, a control device for the external power supply device, and the like, and thus has a problem that the equipment cost is high and the maintenance management cost increases.

  On the other hand, in the galvanic anode type, a galvanic anode made of zinc, aluminum or the like having a lower oxidation-reduction potential than the corrosion-inhibited steel material is installed on the concrete surface, and the potential difference between the galvanic anode and the reinforcing bar is set. It is used to supply current to the reinforcing bars, and the amount of current generated is small, but it can be expected to have a sufficient anti-corrosion effect, and does not require an external power supply, etc., and its installation and maintenance costs are low. Therefore, it is desired to apply this method to the various concrete structures such as concrete floor slabs, concrete box girders, and box culverts.

  On the other hand, the corrosion prevention structure of a concrete structure is classified into a planar anode method, a linear anode method, and a dotted anode method depending on the arrangement of the anode with respect to the concrete portion in which the corrosion-inhibiting steel material is embedded.

  In the planar anode method, the anode material formed in the form of a sheet or net is laid on the surface of the concrete part. In the linear anode method, a plurality of grooves are formed on the surface of the concrete part, and the grooves are linear. The anode material is embedded.

  In addition, in the point anode method, a plurality of holes are provided in concrete according to the amount of reinforcing bars, and after inserting the anode there, the hole is backfilled with cement-based mortar and the anode is installed in the concrete. (For example, refer to Patent Document 1).

Japanese translation of PCT publication No. 8-511581

  However, in the construction of this type of concrete structure corrosion-inhibiting structure, depending on the structure of the concrete structure or the usage situation, the galvanic anode is applied to the concrete part where the corrosion-inhibiting steel material such as reinforcing bars is embedded. The direction in which the installation work can be performed may be limited.

  For example, in the case of concrete floor slabs, when facilities such as elevated roads and bridges are shared, it is difficult to install from the top surface of the floor slab, so the anode installation work is restricted to the bottom side of the floor slab. .

  For concrete box girders, it is necessary to provide scaffolding when working from the outside of the box part, especially the web part. In that case, the cost of installing the scaffolding is high, and the box girder position is high. As a result, various problems such as the influence of wind and rain, the need to newly install anchor materials for the installation of the scaffolding, etc. arise, and depending on the location, the installation of the scaffolding itself may be difficult. In some cases, the installation work is restricted from the inside of the box that can be constructed without using a scaffold.

  Further, in a box culvert or the like buried in the ground, the anode installation work is naturally limited from the inner surface side.

  In such a case, in the conventional galvanic anode type corrosion inhibition structure, the galvanic anode must be installed on the surface side where the concrete part can be constructed or buried at a position closer to the surface. However, if it is arranged on the opposite side of the current flowing anode in the concrete section, there is a possibility that sufficient corrosion protection effect for the corrosion-inhibiting steel material may not be obtained because the distance between the current-generating anode and the corrosion-inhibiting steel material is large. .

  On the other hand, when the point anode method is adopted in the galvanic anode method, it is necessary to install a large number of anodes in order to secure the necessary amount of current. There was a problem that a great deal of labor was required for the return.

  In addition, in the conventional corrosion-inhibiting structure using the point-like anode method, when a metal material such as a reinforcing bar different from the corrosion-inhibiting steel material is embedded in the concrete part, the current flowing from the anode is given priority over the other metal material. There is a possibility that the corrosion-suppressed steel material to be supplied is not sufficiently supplied.

  Furthermore, in the conventional structure, since the anode embedding grooves and holes are backfilled with cement-based mortar, etc., when the galvanic anode is consumed, the concrete must be cut to remove the galvanic anode, There was also a problem that it was difficult to replace the electric anode.

  Therefore, in view of such a conventional problem, the present invention can be applied from the surface side away from the corrosion-inhibiting steel material in the corrosion-inhibiting method by the galvanic anode method, and is applicable to the corrosion-inhibiting steel material. The object is to provide a corrosion-inhibiting structure for a concrete structure in which an appropriate amount of anode can be arranged and the galvanic anode can be easily attached and replaced.

  The feature of the invention according to claim 1 for solving the conventional problems as described above and achieving the intended purpose is to provide a concrete structure having a thick concrete portion in which a corrosion-resistant steel material is embedded. In the corrosion-inhibiting structure of a concrete structure, wherein a current is supplied to the corrosion-inhibiting steel material using a potential difference between the galvanic anode installed in the concrete part and the corrosion-inhibiting steel material, Opening on the surface of the part away from the corrosion-inhibiting steel material and reaching the vicinity of the corrosion-inhibiting steel material, a filling body fitted in the anode installation hole, and embedded in the filling body A corrosion-suppressing structure for a concrete structure, wherein the galvanic anode is inserted to the back side of the anode installation hole.

  The feature of the invention described in claim 2 includes, in addition to the configuration of claim 1, an anode core material that supports the galvanic anode, and an anchor member embedded in a bottom portion on the back side of the anode installation hole, The anode core is provided with a screw portion that is screwed with the anchor member, and the galvanic anode and the filler are detachably fixed to the concrete portion.

  A feature of the invention described in claim 3 is that, in addition to the configuration of claim 1 or 2, an insulating covering made of an insulator is provided in the anode installation hole and outside the galvanic anode.

  According to a fourth aspect of the present invention, in addition to the structure of any one of the first to third aspects, a sealing body that is fitted to the front opening of the anode installation hole and seals the front opening is provided. It is in preparation.

  As described above, the corrosion-inhibiting structure for a concrete structure according to the present invention is a concrete structure having a thick concrete portion in which a corrosion-inhibiting steel material is embedded, and is a galvanic current installed in the concrete portion. In the corrosion suppression structure of a concrete structure configured to supply a current to the corrosion-inhibited steel using the potential difference between the anode and the corrosion-inhibited steel, the concrete portion on the side away from the corrosion-inhibited steel An anode installation hole that opens to the surface and reaches the vicinity of the corrosion-inhibiting steel material, a filler that fits into the anode installation hole, and the galvanic anode that is embedded in the filler. Even if the anode installation work direction with respect to the concrete part is restricted by the insertion of the electroanode to the back side of the anode installation hole, the galvanic anode is arranged in a dotted manner. Can.

  Further, in the present invention, an anode core material that supports the galvanic anode and an anchor member embedded in a bottom portion on the back side of the anode installation hole are provided, and are screwed into the anode core material with the anchor member. A screw part is provided, and the galvanic anode and the filler are detachably fixed to the concrete part, so that the galvanic anode and the filler can be easily attached to and removed from the reinforced concrete floor slab. Work can be performed efficiently.

  Furthermore, in the present invention, by providing an insulating coating made of an insulator inside the anode installation hole and outside the galvanic anode, the concrete portion is closer to the opening side of the anode installation hole than the corrosion-resistant steel. Even when another metal material different from the corrosion-resistant steel material is embedded, it is possible to eliminate the influence of the other metal material and supply current to the corrosion-resistant steel material.

  Further, in the present invention, the filling body is impregnated with an electrolyte solution, so that the electrolyte solution can be supplied uniformly to the flowing electrode, the electrode potential can be stabilized, and the local part of the flowing electrode can be stabilized. Can be prevented, and long life can be maintained.

  Furthermore, in the present invention, it is possible to support the filling body and prevent liquid leakage by including a sealing body that is fitted in the front opening of the anode installation hole and seals the front opening. Can do.

It is sectional drawing which shows an example of the corrosion suppression structure of the concrete structure which concerns on this invention. FIG. 2 is an enlarged longitudinal sectional view of a portion where an galvanic anode is installed in FIG. FIG. 3 is a perspective view showing a galvanic anode in FIG. 2. It is sectional drawing which shows another example of the corrosion suppression structure of the concrete structure based on this invention. It is sectional drawing which shows another example of the corrosion suppression structure of the concrete structure which concerns on this invention. It is sectional drawing which shows a further example of the corrosion suppression structure of the concrete structure which concerns on this invention. (A)-(e) is sectional drawing which shows the installation procedure of an electromotive anode.

  Next, the 1st embodiment of the corrosion control structure of the concrete structure based on this invention is demonstrated based on the Example shown in FIGS. 1-3.

  In the present embodiment, a reinforced concrete floor slab 1 which is a concrete structure will be described as an example. The reinforced concrete floor slab 1 constitutes a concrete part having a thickness in the vertical direction, and is spaced from the lower surface of the floor slab. Reinforcing bars 2 and 2 which are corrosion-resistant steel materials are disposed at the upper position, that is, on the upper side of the floor slab.

  As shown in FIGS. 1 and 2, the corrosion-inhibiting structure of the concrete structure is separated from the lower surface of the reinforced concrete floor slab 1 that forms a thick concrete part, that is, the corrosion-inhibiting steel materials 2 and 2 in the concrete part. .., A plurality of anode installation holes 3, 3... Opened in the surface 1 a on the other side, a filler 4 fitted in the anode installation holes 3, 3. The anode 5 is inserted to the back of the anode installation hole 3, and the anode 5 is connected to the corrosion-inhibiting steel materials 2, 2,... Corrosion of the corrosion-inhibiting steel materials 2, 2 ... by supplying current to the anti-corrosion steel materials 2, 2 ... using the potential difference between the galvanic anode 5 and the corrosion-inhibiting steel materials 2, 2 ... Is supposed to suppress.

  Further, in this corrosion prevention structure for a concrete structure, the galvanic anode 5, the filler 4 and the fixture 6 are integrated to form an anode unit 8, and the anode unit 8 is connected to the anode installation holes 3, 3. It can be removed.

  The anode installation holes 3, 3... Are opened in the lower surface 1 a of the reinforced concrete floor slab 1 and are formed in a cylindrical hole shape with the upper end closed, and the anode installation holes 3, 3. Based on the amount and arrangement of the corrosion-inhibiting steel materials 2, 2... To be subject to corrosion inhibition, they are arranged at a desired distance from each other, and the depth reaches the vicinity of the corrosion-inhibiting steel materials 2, 2. It is formed to a depth.

  An anchor hole 9 is drilled in a concentric communication arrangement at the upper bottom of the anode installation holes 3, 3..., That is, the bottom bottom, and an anchor member 10 such as a cut anchor is embedded in the anchor hole 9.

  The anchor member 10 is provided with a female screw portion (not shown) opened to the anode installation holes 3, 3,..., And a male screw 11b at the tip of the anode core member 11 to be described later is screwed together. 5 can be fixed detachably.

  Further, a sealing body 12 is fitted into the lower surface opening of the anode installation holes 3, 3,... So that the lower surface opening can be sealed.

  This sealing body 12 is formed in a thin plate shape having a certain thickness with a water-impermeable elastic material such as a rubber material, and its outer peripheral surface is fitted into the inner edge of the lower surface opening of the anode installation holes 3, 3. The opening is sealed.

  The sealed body 12 has a through hole 12a in the center, and an anode core 11 to be described later passes through the through hole 12a so that it can be fixed to the reinforced concrete floor slab 1 by the fixture 6 together with the galvanic anode 5. It has become.

  As shown in FIG. 3, the galvanic anode 5 has a plurality of plate-like anode members 13, 13... And the anode members 13, 13. The anode member 11 is supported, and the anode members 13, 13... Are electrically connected via the anode core member 11.

  The anode members 13, 13... Are formed in a thin disk shape having a certain thickness with a metal such as zinc having a low oxidation-reduction potential with respect to the corrosion-inhibiting steel materials 2, 2. It has a connecting hole 13a formed with an internal thread (not shown) on the inner periphery.

  Then, the internal thread formed in the connection hole 13a of each anode member 13, 13 ... and the external thread 11b formed on the outer periphery of the anode core material 11 are screwed together, and the anode core material 11 is connected to each anode. The anode members 13, 13... Face each other at desired positions of the anode core material 11 at intervals from each other by passing through the members 13, 13. It is fixed in the state. In the present embodiment, the example in which the anode core 11 and the anode members 13 and 13 are screwed together has been described. However, the anode core member 11 and the anode members 13 and 13 may be fixed in an electrically conductive state by welding or the like.

  The anode core material 11 is formed of a conductive metal material, and has a rod-shaped main body portion 11a, a male screw 11b formed on the outer periphery of the main body portion 11a, and an outward direction supported by the other end of the main body portion 11a. The bolt head portion 11c projecting over is formed into a bolt shape, and the distal end portion of the male screw 11b constitutes an anchor engaging portion.

  Then, by screwing the male screw 11b at the tip of the anode core material 11 into the anchor member 10, the electroplating anode 5 is entirely inserted into the anode installation hole 3 and fixed to the reinforced concrete floor slab 1, The bolt head 11c is fixed to the lower surface of the sealing body 12, and the anode unit 8 is also fixed.

  In the figure, reference numeral 14 denotes a metal washer, and reference numeral 15 denotes a connection terminal connected to the lead wire 7. The connection terminal 15 is interposed between the washer 14 and the bolt head 11c, and the anode core. The material 11 is tightened, and the connection terminal 15 is sandwiched between the washer 14 and the bolt head 11c.

  The other end of the lead wire 7 is connected to the connection box 16, and is connected to the corrosion-resistant steel materials 2, 2.

  The filler 4 is formed of a porous member having water retention properties such as a phenol resin continuous foam, and an electrolyte solution is impregnated and held therein. In addition, the porous member which comprises the filling body 4 becomes easy to attach or detach with respect to the anode installation hole 3 by using a thing with low adhesiveness with respect to concrete.

  The filling body 4 includes plate-shaped plate-shaped filling portions 17, 17... Stacked between the anode members 13, 13. Are formed by assembling the plate-type filling portions 17, 17... And the coating filling portion 18.

  The covering filling portion 18 is formed in a bottomed cylindrical shape whose outer diameter is substantially the same as or slightly larger than the inner diameter of the anode installation holes 3, 3..., And a plate between the anode members 13, 13. The galvanic anode 5 in a state where the mold filling portions 17, 17... Are stacked is fitted.

  The plate-shaped filling portions 17, 17... Are formed by a porous member in the shape of a thin disk that is substantially the same shape as the anode members 13, 13. And the outer peripheral surface is fitted into the inner hole 18 a of the covering filling portion 18 so as to be integrated with the covering filling portion 18.

  As the electrolyte solution impregnated in the filler 4, for example, an aqueous lithium nitrite solution adjusted to pH 8 to 10 or an aqueous lithium hydroxide solution adjusted to pH 12 to 14 can be used. It is insoluble in the electrolyte solution.

  In addition, the aspect of the corrosion-inhibiting structure for concrete structures according to the present invention is not limited to the above-described example of the reinforced concrete floor slab 1. For example, the concrete box girder 20, the box culvert 30 embedded in the ground, and the like. It can also be applied to other concrete structures. In addition, the same structure as the above-mentioned Example is demonstrated and attached | subjected, and the description is abbreviate | omitted suitably.

  As shown in FIG. 4, the concrete box girder 20 has a pair of flat upper floor slab 21, lower floor slab 22 arranged at a distance from upper and lower slabs 21, and a pair of upper and lower floor slabs 21 and 22. A box portion surrounded by the upper floor slab 21, the lower floor slab 22 and the webs 23, 23 is formed.

  The upper floor slab 21, the lower floor slab 22, and the web 23 are thick concrete parts, respectively, and corrosion-resistant steel materials 2, 2,... It is installed.

  In the corrosion-inhibiting structure of the concrete box girder 20, when the corrosion of the lower floor slab 22 and the webs 23 and 23 portions which are concrete parts is to be suppressed, the inner surface of the box part, that is, the corrosion-inhibiting steel material 2 of the concrete part. 2... Are opened in the surfaces 22 a and 23 a on the side away from 2... And a plurality of anode installation holes 3 and 3. It is provided with a filler 4 to be fitted and a fluid-electric anode 5 embedded in the filler 4 so that the fluid-current anode 5 can be inserted from the inside of the box part to the back side of the anode installation hole 3. .

  This type of concrete box girder 20 is mainly used for large-scale structures, and it is difficult to renew the concrete bridge girder even if corrosion occurs. Re-repair may be required.

  In such a case, in the present invention, since the anode can be installed from the inside of the box portion, there is no need to install a scaffold, and the operation can be performed at low cost.

  As shown in FIG. 5, the box culvert 30 is formed in a rectangular cylindrical shape by the top plate portion 31, the bottom plate portion 32, and the side wall portions 33, 33, and the top plate portion, the bottom plate portion, and the both side wall portions are thick. Consists of a concrete part.

  And on the outside of each concrete part, corrosion-inhibiting steel materials 2, 2..., Such as reinforcing bars and PC steel materials, are arranged.

  In the corrosion-inhibiting structure of the box culvert 30, when the corrosion of the top plate portion 31, the bottom plate portion 32 and the side wall portions 33, 33 that are concrete portions is suppressed, the inner side surface thereof, that is, the corrosion-inhibiting steel material 2 of the concrete portion. , 2 are opened in the surfaces 31a, 32a, 33a on the side away from the steel plate 2 and fitted in a plurality of anode installation holes 3, 3. By including the filler 4 to be combined and the galvanic anode 5 embedded in the filler 4, it can be applied even in a state where it is embedded in the ground.

  The concrete structure corrosion inhibiting structure according to the present invention is provided with an insulating covering 40 made of an insulating material inside the anode installation hole 3 and outside the galvanic anode 4, as shown in FIG. It may be.

  As described above, by providing the insulating covering 40 made of an insulator outside the galvanic anode 4, the other portion is provided on the opening side of the anode installation hole 3 in the concrete portion 1 than the corrosion-resistant steel materials 2, 2. Even when the metal materials 41 and 41 are buried, the current can be reliably supplied to the corrosion-inhibited steel materials 2 and 2 without being affected by the other metal materials 41 and 41, and high corrosion is caused. A suppression effect can be secured.

  Next, the construction procedure of the corrosion inhibiting structure for the concrete structure will be described with reference to FIG. In this embodiment, the reinforced concrete floor slab 1 is described as an example, but the same applies to the construction of the concrete box girder 20 and the box culvert 30 described above.

  First, referring to the design drawing of the concrete part (here, reinforced concrete floor slab 1) that is subject to corrosion inhibition, the amount of corrosion-inhibited steel materials 2, 2 ... in the concrete part (reinforced concrete floor slab 1) and The arrangement is grasped, and the interval between the anode installation holes 3, 3... Is determined based on the corrosion-inhibiting steel materials 2, 2.

  Further, as advance preparation, the anode unit 8 is assembled by assembling the filler 4, the galvanic anode 5, the fixture 6 and the sealing body 12.

  Next, based on the above determination, anode installation holes 3, 3... Are formed at predetermined positions from the lower surface side of the reinforced concrete floor slab 1, that is, the surface of the concrete portion away from the corrosion-resistant steel. The anode installation holes 3, 3... Are formed by drilling to a depth reaching the vicinity of the corrosion-inhibiting steel materials 2 and 2 by an existing method using a drilling machine. ... A small-diameter anchor installation hole is drilled in the upper bottom surface, and an anchor member 10 such as a cut anchor is inserted into the anchor hole 9 and fixed.

  Next, after the anode installation holes 3, 3... Are formed, the anode unit 8 that has already been assembled is inserted into the anode installation holes 3, 3. ... The anode core 11 is tightened while being fitted therein, and the male screw 11 b at the tip of the anode core 11 is screwed into the anchor member 10.

  Thus, as the anode core 11 is screwed into the anchor member 10, the entire anode unit 8 is fitted into the anode installation holes 3, 3... The galvanic anode 5 is fixed to the concrete portion at the position where it is inserted to the side, the bolt head 11c is fixed to the lower surface of the sealing body 12, and the sealing body 12 is opened to the lower surface of the anode installation holes 3, 3,. Fix in a state fitted to

  Further, when the connecting terminal 15 is sandwiched between the washer 14 and the bolt head 11 c by tightening the bolt, the galvanic anode 5 is connected to the lead wire 7, and other than the lead wire 7 connected to the connecting terminal 15. The end is connected to the connection box 16.

  The above process is repeated for each anode installation hole 3, 3,.

  On the other hand, in order to replace the consumed galvanic anode 5, when the bolt of the anode core 11 is rotated in the loosening direction, the anode core 11 is moved downward by the jacking action by the screw structure, and accordingly, The anode members 13, 13 ... integrated with the anode core 11 and the plate-shaped filling portions 17, 17 ... sandwiched between the anode members 13, 13 ... move downward, and the anode The unit 8 is pushed out from the anode installation holes 3, 3.

  At that time, the coating filling portion 18 may remain in the anode installation holes 3, 3,..., In this case, the anode installation holes 3, 3,. Remove from ..

  At that time, since the galvanic anode 5 and the plate-type filling portions 17, 17... Are already removed from the covering-type filling portion 18, and the inside is hollow, it can be easily removed.

  Then, after the inside of the anode installation holes 3, 3 ... is cleaned, the replacement is completed by installing the anode unit 8 in the anode installation holes 3, 3 ... according to the above-described procedure shown in FIG.

  In the corrosion suppression structure of the concrete structure configured as described above, the galvanic anode 5 can be configured in a dotted manner in the galvanic anode method, and the corrosion-inhibited steel material 2 that is a corrosion suppression target. The galvanic anode 5 can be easily attached and detached from the surface of the concrete part on the side away from 2.

  Even in such a case, since the galvanic anode 5 is arranged so as to reach a position close to the corrosion-inhibiting steel materials 2, 2..., Such as the reinforcing bars on the upper surface side of the reinforced concrete floor slab 1, it is efficient. Corrosion of the corrosion-resistant steel materials 2 and 2 can be suppressed.

  In the above-described embodiment, an example in which the anode unit 8 in which the galvanic anode 5 is embedded in the filler 4 is used and the anode unit 8 is inserted into the anode installation hole 3 has been described. May be configured such that after the galvanic anode 5 is installed in the anode installation holes 3, 3..., The gap 4 is filled with the filler 4. Even in such a case, the galvanic anode 5 and the filler 4 can be easily removed from the anode installation holes 3, 3... By the jack function of the screw structure of the anchor member 10 and the anode core material 11.

DESCRIPTION OF SYMBOLS 1 Reinforced concrete floor slab 2 Corrosion suppression steel material 3 Anode installation hole 4 Packing body 5 Current-feeding anode 6 Fixture 7 Lead wire 8 Anode unit 9 Anchor hole 10 Anchor member 11 Anode core material 12 Sealed body 13 Anode member 14 Washer 15 Connection terminal 16 Connection box 17 Plate filling part 18 Cover filling part

Claims (4)

Corrosion-inhibiting steel material in a concrete structure having a thick concrete part in which corrosion-inhibiting steel material is embedded, and utilizing the potential difference between the galvanic anode installed in the concrete part and the corrosion-inhibiting steel material In the structure for inhibiting corrosion of concrete structures that are designed to supply current to the
An anode installation hole that opens on the surface of the concrete portion away from the corrosion-inhibited steel material and reaches the vicinity of the corrosion-inhibited steel material, a filler that fits into the anode installation hole, and the filled body A corrosion-inhibiting structure for a reinforced concrete structure, characterized in that the galvanic anode embedded in the anode is inserted into the anode installation hole.   An anode core material that supports the galvanic anode, and an anchor member embedded in a bottom portion on the back side of the anode installation hole, and a screw portion that is screwed into the anchor member on the anode core material, The corrosion-inhibiting structure for a concrete structure according to claim 1, wherein the galvanic anode and the filler are detachably fixed to the concrete portion.   The corrosion-inhibiting structure for a concrete structure according to claim 1 or 2, further comprising an insulating coating made of an insulator in the anode installation hole and outside the galvanic anode.   The corrosion-inhibiting structure for a concrete structure according to any one of claims 1 to 3, further comprising a sealing body that is fitted in a front opening of the anode installation hole and seals the front opening.

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