JP4191070B2 - Repair method for concrete foundation block - Google Patents

Description

  The present invention relates to a method for repairing a concrete foundation block constituting a foundation portion of a steel tower such as a power transmission line.

  As disclosed in, for example, Patent Document 1 below, a foundation portion of a steel tower such as a power transmission line is constructed by excavating the ground, standing a steel tower member constituting the steel tower in the excavation hole, and placing concrete there It is formed by. The concrete foundation block constituting the foundation portion of the steel tower is formed in a block shape so as to protrude to a place higher than the ground, and a steel tower member is extended from the upper surface thereof. For example, as shown in FIG. 1, in the concrete foundation block 10, cracks (cracks) 12 may occur due to drying shrinkage of concrete or vibration of a steel tower. In addition, a gap may be generated between the concrete portion and the steel tower member 30. When cracks 12 and gaps are generated in the concrete foundation block 10 in this way, rainwater enters from the cracks and the steel tower member 30 is rusted and corroded.

Thus, when the crack 12 etc. arise in the concrete foundation block 10, although repair will be performed, the repair construction method is shown in FIGS. First, most of the concrete foundation block 10 (the upper part of the block) 81 in which the crack 12 is generated is picked up to expose the rusting part 32 of the steel tower member 30 (FIG. 27). And the rust preventive material 83 is apply | coated to the rusting part 32 (FIG. 28), the hanging surface (upper surface) 85 of the remaining block lower part is cleaned, and the primer 87 for concrete is apply | coated there (FIG. 29). Then, resin concrete 89 is placed on the upper part of the block using a mold (FIG. 30), and the joint between the steel tower member 30 and the resin concrete 89 is caulked to complete the repair (FIG. 31).
JP-A-10-317391

  In the conventional repair method described above, most of the concrete foundation block is removed, and concrete is placed in the place where it is removed. Therefore, it is difficult to shorten the repair work period. Yes. In particular, when repairing with resin concrete, it takes two to three days of construction work, and during that time, it is necessary to take protective measures so that the repaired part is not exposed to wind and rain. In addition, the cost of repair work is increased due to an increase in the amount of material transport accompanying the lifting work, the form installation work and the removal work, and the generation of industrial waste.

  In addition, even if cracks occur in the concrete, depending on the cracking situation, the steel tower members may not have rusted. In such a case, it is very wasteful to remove most of the concrete foundation block. It has become.

  Therefore, the present invention has been made in view of such points, and an object of the present invention is to enable repair of a concrete foundation block by a low-cost and simple method and to shorten the work period.

  In order to achieve the above-mentioned object, the present invention includes the above-mentioned cracked portion on the premise of a method for repairing a cracked portion of a concrete foundation block fixed to the ground and provided with tower members constituting the tower. A pretreatment process for applying a primer to the block surface and a tape application process for applying an anticorrosion tape to the block surface are included.

  In the present invention, for example, when rust is not generated on the steel tower member and the cracked state of the block is not so severe, the primer is applied with the cracked part left as it is, and the cracked part is then removed. Since the anticorrosion tape is only applied to the block surface so as to cover, the concrete foundation block can be repaired very easily. In addition, even if it is not possible to put a filler because the crack width is small, it is possible to block the crack by sticking the tape, so that the steel tower member rusts or progresses rust. It can be suppressed easily and reliably. In addition, because it is configured to apply anticorrosion tape, even if the cracking of concrete may progress in the future, this anticorrosion tape can follow the progress of cracking and so on, so it is far more durable than the configuration where anticorrosive coating is applied Can be improved. In addition, this repair method does not remove most of the blocks including cracked parts as in the past, so repairs can be made without the hassle of transporting the materials necessary for repair work, and the repair work period is reduced. Can be shortened.

  Further, before the tape application step, a rust prevention treatment step of applying a primer having a rust prevention effect to a predetermined portion of the steel tower member near the block surface is included, and in the tape application step, the primer is a primer in the pretreatment step. If the anticorrosive tape is applied to the surface of the block to which the coating is applied and the predetermined part of the tower member to which the primer has been applied in the rust prevention treatment step, rusting and corrosion of the tower member can be effectively suppressed. Can do.

  Further, the repair method includes a cutting step of scraping the periphery of a steel tower member including at least a part of the cracked portion so as to form a recess before the pretreatment step, and a block for filling the recess with a filler. A restoration step, and the pretreatment step may be configured to apply a primer including the surface of the filler filled in the block restoration step.

  In this repair method, the concrete around the tower member is scraped off to an appropriate size, so that the rust generation status can be easily confirmed, and when the tower member is rusted. The rust removal of the steel tower member can be easily performed. That is, in this repair method, unlike the conventional repair method, unlike the structure in which most of the concrete foundation block is suspended, it is configured to scrape only a small part around the steel tower member. This is effective when only checking

  And in this repair method, since concrete is scraped off so that a hollow may be formed, if a filling material is filled into this hollow, a concrete foundation block can be easily restored. For this reason, it is not necessary to install a large formwork when checking the state of occurrence of rust and restoring the block in the rust removal work, and as a result, it is possible to avoid the troublesome repair work. Therefore, not only the transportation of materials accompanying the formwork and installation work becomes unnecessary, but also the disposal cost of these materials can be reduced, so that the repair cost can be reduced.

  Further, the repair method includes a rust prevention treatment step of applying a rust preventive primer to the steel tower member including a portion exposed as a result of shaving a part of the block in the shaving step, and in the tape application step If the anticorrosion tape is applied to the block surface coated with the primer in the pretreatment step and the predetermined part of the tower member coated with the primer in the rust prevention treatment step, rusting and corrosion of the tower member Can be effectively suppressed.

  Moreover, if the anticorrosion tape affixed on the block at the tape application step includes a finishing step of applying a top coat material, the anticorrosion tape itself can be protected and durability can be improved.

  The anticorrosion tape is made by impregnating a porous base material with a rust prevention compound and forming a film on the surface by oxidative polymerization and having a structure having excellent flexibility. The anticorrosion effect can be exhibited effectively.

  As described above, according to the present invention, since the concrete foundation block is repaired by applying an anticorrosion tape to the surface of the block so as to include cracked portions, in addition to being able to repair by a simple operation, In addition, unnecessary work such as hanging concrete more than necessary can be eliminated and the construction period can be shortened, and the cost required for repair work can be reduced.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  The present embodiment relates to a method for repairing a concrete foundation block (hereinafter simply referred to as a foundation block) for erecting a steel tower (not shown) such as a transmission line. As shown in FIG. 1, the foundation block 10 is fixed to an excavation hole excavating the ground 20, and its upper end protrudes above the ground, and the upper end is formed in a block shape, for example, a rectangular parallelepiped shape. Has been. And the steel tower member 30 which comprises a steel tower is extended toward diagonally upward from the upper surface 10a of the foundation block 10. As shown in FIG. For example, four foundation blocks 10 are provided as the foundation of the steel tower.

  In order to erect the steel tower member 30, first, the ground 20 is excavated at four points which are the apexes of the square to form excavation holes, and the steel tower member 30 is erect in each of these excavation holes. At this time, the steel tower member 30 is installed at a predetermined angle. Then, after installing a frame mold (not shown) in a rectangular tube shape so as to surround the steel tower member 30, the concrete block is poured into the foundation block 10 with the upper end projecting upward from the ground. can do.

  In the foundation block 10 in which the steel tower member 30 is erected in this way, cracks 12 occur as shown in FIG. The crack 12 is generated when the steel tower vibrates due to an external force or the concrete is dried and contracted. For example, the crack 12 is outward along the block upper surface 10a from the boundary between the steel tower member 30 and the concrete part. Occurs so as to extend toward.

  A method for repairing the crack 12 of the foundation block 10 will be described. First, as shown in FIG.2 and FIG.3, a part of concrete which comprises the upper surface 10a of the foundation block 10 is scraped off (scraping process). In this cutting process, a portion of the concrete surrounding the steel tower member 30 is cut into a mortar shape, whereby a recess 14 is formed on the upper surface 10a of the foundation block 10. At this time, a part of the concrete is scraped off so that at least a part of the cracked part is included. And when rust has generate | occur | produced in the steel tower member 30, concrete is scraped off until all this rusting part 32 is exposed. Next, rust removal of the steel tower member 30 is performed (rust removal process). Note that the step of scraping off a part of the concrete may be omitted depending on the situation of the crack 12 of the foundation block 10.

  Next, as shown in FIG. 4, the primer 35 which has a rust prevention effect is apply | coated to the rusting part 32 of the steel tower member 30, and its periphery (rust prevention process process). In this rust prevention treatment process, the primer 35 is applied over the exposed portion including the rusting portion 32 of the steel tower member 30 by scraping the concrete from the portion located above the foundation block 10. As the primer 35, a primer containing mineral spirit as a main component can be used, and specific examples thereof include Nitharmak (registered trademark) XG-P (manufactured by Nitto Denko Corporation). .

  Next, as shown in FIG. 5, the filling material 16 is filled into the recess 14 on the upper surface 10 a of the basic block 10 (block restoration step). In this block restoration process, the foundation block 10 is restored to a rectangular parallelepiped shape by filling the depressions 14 formed around the steel tower member 30. At this time, when the gap of the crack 12 is large with respect to the crack 12 which remains as it is after part of the concrete is scraped off, the filler 16 may be filled in the gap. As the filler 16, for example, a filler or clay having aluminum hydroxide as a main component can be used, and as a specific one, for example, Nitharmak (registered trademark) XG-M (manufactured by Nitto Denko Corporation) can be used. Can be mentioned.

  Next, as shown in FIG. 6, the primer 18 is apply | coated to the surface of the basic block 10 as a pre-processing of the site | part which sticks the anticorrosion tape 40 mentioned later (pre-processing process). The adhesion of the anticorrosion tape 40 can be improved by applying the primer 18. In this pretreatment step, the primer 18 is applied to the upper surface 10a and the side surface 10b of the block 10 so that all the 12 cracks of the basic block 10 are included. As the primer 18, for example, a primer having a PMA polymer as a main component can be used, and specific examples thereof include, for example, Nito Primer (registered trademark, manufactured by Nitto Denko Corporation).

  Next, as shown in FIG. 7, the anticorrosion tape 40 is affixed on the foundation block 10 on which the pretreatment has been performed and the steel tower member 30 on which the rust prevention treatment has been performed (tape affixing step). Details of how to apply the anticorrosion tape 40 will be described later. As the anticorrosion tape 40, a known one (for example, see JP-A-10-44320) can be used. For example, a porous substrate is impregnated with a rust prevention compound, and a film is formed on the surface by oxidation polymerization. It is possible to use a material that is excellent in flexibility. As the porous base material, non-woven fabrics, woven fabrics, felts, and the like made of plastic fibers such as polyester fibers, polyprene fibers, and polyamide fibers can be used. As the rust preventive compound, those obtained by kneading a rust preventive, a drying oil, a high viscosity lubricating oil, an inorganic filler, and various additives can be used. Moreover, it is also possible to use the anticorrosion tape 40 having vegetable oil as a main component. Specific examples of the anticorrosion tape 40 include Nitharmak (registered trademark) XG (manufactured by Nitto Denko Corporation).

  Next, as shown in FIG. 8, a top coat material 42 is applied to the anticorrosion tape 40 (finishing step). By applying the top coat 42, the anticorrosion and weather resistance of the anticorrosion tape 40 can be increased, and coloring can be performed after drying. A series of repairs are completed by applying the top coat 42. As the top coating material 42, for example, a material having an acrylic polymer as a main component can be used. Specific examples thereof include Nitharmak (registered trademark) XG-T, XG-T (LW) (both Nitto). Manufactured by Denko Co., Ltd.).

  Here, a specific method of applying the anticorrosion tape 40 will be described with reference to FIGS. First, as shown in FIGS. 9 and 10, the anticorrosion tape 40 is attached to the side surface 10 b of the foundation block 10. At this time, the anticorrosive tape 40 is polymerized and bonded two layers at a time by shifting the anticorrosive tape 40 for about one turn by an amount corresponding to half of the tape width and sequentially attaching the anticorrosive tape 40 while overlapping each other. Like that. Further, by shifting the anticorrosion tape 40 from below to above, the anticorrosion tape 40 is affixed to the outside of the anticorrosion tape 40 positioned below the anticorrosion tape 40, and rainwater or the like is difficult to enter.

  And as shown in FIG. 11, about the anticorrosion tape 40 located in the upper end in the side surface 10b of the foundation block 10, after bending the part which protruded from the side surface 10b of the foundation block 10, and scrubbing by hand, on the block upper surface 10a paste.

  Then, as shown in FIG. 12, the anticorrosion tape 40 is affixed on the upper surface 10a of the basic block 10. At this time, the anticorrosion tape 40 is affixed from one end of the upper surface 10a to the entire other end so that the anticorrosion tape 40 is spanned between the side surfaces 10b, 10b facing each other. Then, the anticorrosion tape 40 is attached so as to be substantially parallel and overlap each other while being sequentially shifted by approximately half of the tape width from the end of the upper surface 10a toward the center. The anticorrosion tape 40 at the end of the upper surface 10a is attached to the side surface 10b while the portion protruding from the upper surface 10a is bent and scrubbed by hand. On the other hand, the upper surface 10a of the base block 10 is generally formed in a convex shape in which the standing portion of the tower member 30 is slightly raised, so that the anticorrosion tape 40 is moved from the end of the upper surface 10a to the central portion. By sticking while sequentially shifting toward the bottom, the anticorrosion tape 40 on the center side is attached on the upper side of the anticorrosion tape 40 on the outer side, and rainwater or the like is difficult to enter. In addition, the anticorrosion tape 40 is folded and attached to the steel tower member 30 at the part of the contact with the steel tower member 30, and is attached with a scissors by hand each time.

  If the anticorrosion tape 40 is affixed to the whole upper surface 10a of the base block 10, this time, the anticorrosion tape 40 will be affixed in the direction orthogonal to this anticorrosion tape 40 as shown in FIG. And as shown in FIG. 14, if there exists a part in which the anticorrosion tape 40 is not affixed in the lower end part of the tower member 30 which protrudes from the upper surface 10a of the basic block 10, the anticorrosion tape 40 will also be affixed also to the part.

  And finally, as shown in FIG. 15, the anticorrosion tape 40 is affixed on the predetermined range of the steel tower member 30. The anticorrosion tape 40 is attached while being sequentially shifted from the bottom to the top so as to wrap each half of the tape width. Thereby, since the anticorrosion tape 40 located on the upper side is affixed to the outside of the anticorrosion tape 40 located on the lower side, rainwater and the like are less likely to enter.

  As described above, according to the repair method of the foundation block 10 according to the present embodiment, for example, when the rust is not generated in the steel tower member 30 and the crack condition of the foundation block 10 is not so severe, the crack is generated. Since the primer 35 is applied with the 12 portions left as they are, and the anticorrosion tape 40 is simply applied to the block surface so as to cover the 12 cracks, the basic block 10 can be repaired very easily. . Moreover, since the crack 12 can be plugged by sticking the anticorrosion tape 40 even if the filler 16 cannot be put in because the gap width of the crack 12 is small, the steel tower member 30 is rusted. Or it can suppress easily and reliably that rust advances. Further, since the anticorrosion tape 40 is applied, the anticorrosion tape 40 can follow the progress of the crack 12 even if the concrete crack 12 may progress in the future. Durability can be improved. Furthermore, in this repair method, since most of the blocks including 12 cracks are not picked up as in the past, the repair can be performed without taking the trouble of transporting materials necessary for the formwork installation work. Repair period can be shortened.

  Therefore, in addition to being able to repair by simple work, unnecessary work such as hanging concrete more than necessary can be eliminated and the work period can be shortened, and the cost required for repair work can be reduced.

  Moreover, in this embodiment, when it is necessary to confirm whether or not rust has occurred, the concrete around the steel tower member 30 is scraped off so that a depression 14 of an appropriate size is formed in the foundation block 10. Therefore, it is possible to easily check the occurrence of rust. Further, when rust is generated in the steel tower member 30, it is possible to easily remove rust by scraping the concrete around the steel tower member 30 so that the rusting portion 32 is exposed. And in this repair method, since it is set as the structure which scrapes off concrete so that the dent 14 may be formed, the foundation block 10 can be decompress | restored only by filling the dent 14 with the filler 16. For this reason, when restoring the foundation block 10 in the confirmation of the state of occurrence of rust or in rust removal work, it is possible to avoid installing a large formwork. Therefore, not only does the conveyance of the material associated with the formwork and its installation work become unnecessary, but also the disposal cost of these materials can be reduced, so that the repair cost can be reduced.

  Moreover, in this embodiment, since the primer 35 which has a rust prevention effect is apply | coated to the steel tower member 30 vicinity of the block upper surface 10a, the rusting and corrosion of the steel tower member 30 can be suppressed.

  Moreover, in this embodiment, since the top-coat material 42 is apply | coated to the anticorrosion tape 40, the anticorrosion tape 40 itself can be protected and durability can be improved.

  Further, in this embodiment, the anticorrosive tape 40 is composed of a porous base material impregnated with a rust preventive compound and a film formed on the surface by oxidative polymerization and having excellent flexibility. Therefore, intrusion of rainwater or the like into 12 cracks of the foundation block 10 can be reliably suppressed by a simple method.

  In the present embodiment, the upper surface 10a of the foundation block 10 is scraped to form the recess 14. However, the present invention is not limited to this. For example, when the cracking condition of the foundation block 10 is not so severe. The primer 18 may be applied to the foundation block 10 without removing a part of the concrete, and the anticorrosion tape 40 may be attached thereto. In this case, the anticorrosion tape 40 may be affixed only to the concrete surface, or may be affixed to both the steel tower member 30 and the concrete surface.

  Moreover, you may affix the anticorrosion tape 40 only on the upper surface 10a, without affixing on the side surface 10b of the foundation block 10. FIG. Even in this way, rainwater or the like can be prevented from entering from 12 cracks.

  Further, when the concrete around the steel tower member 30 is scraped off so as to form a recess 14 of an appropriate size, if rusting cannot be confirmed, the rust prevention treatment of the steel tower member 30 is omitted. It can also be configured.

  Here, the reference example of the repair method using the anticorrosion tape 40 is demonstrated. As shown in FIG. 16, concrete may be laid over the entire surface of the site serving as the foundation of the steel tower. This is called soil concrete 50. The soil concrete 50 is placed, for example, on the entire site including the four foundation blocks 40. In the soil concrete 50, cracks 52 may occur due to drying shrinkage or the like. Weeds may grow through the places. There has been no suitable repair method for repairing the cracks 52 of the soil concrete 50 as described above, and only 52 of the cracks were weeded as shown in FIG.

  Therefore, a repair method using the anticorrosion tape 40 is effective. First, after weeding, 52 fillers are filled with a filler. This may be performed when the gap width of the crack 52 is about 5 mm or more. When the gap width is narrower than this, it is not always necessary to fill the filler. And as shown in FIG. 18, the primer 18 is apply | coated to the surface of the soil concrete 50 so that 52 places of cracks may be included, and the anticorrosion tape 40 is affixed on this application part (FIG. 19). In order to apply the anticorrosion tape 40, it is effective that the anticorrosion tape 40 is in close contact with the concrete if it is applied by hand with an appropriate stroke. Then, the top coating material 42 is not applied to the anticorrosion tape 40 (FIG. 20), and the repair work is completed. Thus, according to the repair method using the anticorrosion tape 40, the soil concrete 50 can be repaired by a simple method and in a short time.

  Still another reference example will be described. As shown in FIGS. 21 and 22, the ground around the steel tower site 60 where the steel tower is erected may be higher than the steel tower site 60 due to creation or the like. If such a situation is left unattended, rainwater or the like accumulates in the steel tower site 60, which is not preferable. Therefore, the steel tower site 60 is backfilled to the same height as the surrounding ground. 21 indicates the ground 65 after backfilling.

  Conventionally, in this case, as shown in FIG. 23, prior to backfilling, to prevent the steel tower member 30 from being corroded, the raising concrete 62 is further placed in a block shape above the foundation block 10. . By doing so, the raising concrete 62 can be protruded from the ground 65 after backfilling (FIG. 24), and corrosion of the steel tower member 30 can be prevented.

  However, in the conventional method, a large formwork or the like is required for placing the raising concrete 62, and the construction period is several days. Therefore, as shown in FIG. 25, if the anticorrosion tape 40 is attached to the foundation block 10 and the steel tower member 30 in the same manner as in the above embodiment, the operation can be completed easily and in a short time. In this method, as shown in FIG. 26, it is necessary to wrap the anticorrosion tape 40 up to a portion higher than the height of the ground 65 to be backfilled. Also by this method, the corrosion prevention effect of the steel tower member 30 can be obtained similarly to the above method. 25 and 26 show a state in which the ground 65 is backfilled with the anticorrosion tape 40 applied for convenience, but it is desirable to apply a top coat material to the anticorrosion tape 40.

It is a perspective view which shows the basic block in which the crack generate | occur | produced. In the repair method which concerns on embodiment of this invention, it is a figure equivalent to FIG. 1 which shows the state by which a part of upper surface of the foundation block was shaved off. In the said repair method, it is sectional drawing which shows the state by which a part of upper surface of the basic block was scraped off. FIG. 2 is a view corresponding to FIG. 1 showing a state in which a primer is applied to a steel tower member in the repair method. FIG. 2 is a view corresponding to FIG. 1 showing a state in which a recess is filled with a filler in the repair method. FIG. 2 is a view corresponding to FIG. 1 showing a state where a primer is applied to concrete in the repair method. FIG. 2 is a view corresponding to FIG. 1 showing a state where an anticorrosion tape is stuck in the repair method. FIG. 2 is a view corresponding to FIG. 1 showing a state in which a top coat material is applied to the anticorrosion tape in the repair method. In the tape sticking process of the said repair method, it is a figure equivalent to FIG. 1 which shows the state which stuck the anticorrosion tape only for 1 round on the block side surface. In the tape sticking process of the said repair method, it is a figure equivalent to FIG. In the tape sticking process of the said repair method, it is the FIG. 1 equivalent figure which shows the state which stuck the anticorrosion tape to the upper part of a block side surface. FIG. 2 is a view corresponding to FIG. 1 showing a state in which an anticorrosion tape is stuck on the upper surface of the block in the tape sticking step of the repair method. In the tape sticking process of the said repair method, it is the FIG. 1 equivalent figure which shows the state which stuck the anticorrosion tape in the direction orthogonal to the tape sticking direction of the block upper surface in FIG. It is the FIG. 1 equivalent view which shows the state which affixed the anticorrosion tape to the lower end part of the steel tower member in the tape sticking process of the said repair method. In the tape sticking process of the said repair method, it is a figure equivalent to FIG. 1 which shows the state stuck, wrapping an anticorrosion tape on a steel tower member. It is a perspective view which shows roughly the state in which the weed grew in the crack part of soil concrete. FIG. 17 is a view corresponding to FIG. 16 illustrating a state in which weeds at cracked portions have been removed. It is the FIG. 16 equivalent view which shows the state which applied the primer to the soil concrete including a crack location. FIG. 17 is a view corresponding to FIG. 16 showing a state in which an anticorrosion tape has been applied to the primer application portion. FIG. 17 is a view corresponding to FIG. 16 showing a state where a top coat material is applied to the anticorrosion tape. It is a perspective view which shows the whole steel tower site schematically. It is the A section enlarged view of FIG. It is FIG. 22 equivalent view which shows the state which raised the foundation block with the concrete for raising. FIG. 23 is a view corresponding to FIG. 22, illustrating a state in which the steel tower site is backfilled in a raised state. It is FIG. 22 equivalent view which shows the state which affixed the anticorrosion tape to the foundation block and the steel tower member. It is the FIG. 22 equivalent figure which shows the state by which the steel tower site was backfilled in the state where the anticorrosion tape was stuck. In the conventional repair method of a foundation block, it is a perspective view which shows the state which removed the block upper part. It is the FIG. 27 equivalent view which shows the state which performed the rust prevention process of the steel tower member in the said repair method. FIG. 28 is a view corresponding to FIG. 27 showing a state where a primer is applied to the hanging surface of the concrete lower part in the repair method. FIG. 28 is a view corresponding to FIG. 27 showing a state in which resin concrete is placed in the repair method. FIG. 28 is a view corresponding to FIG. 27 illustrating a state where caulking is performed on a joint portion between a steel tower member and concrete in the repair method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Concrete foundation block 10a Upper surface 10b Side surface 12 Crack 14 Depression 16 Filler 18 Primer 30 Steel tower member 35 Primer 40 Anticorrosion tape 42 Top coating material

Claims (6)

A method of repairing a cracked portion of a concrete foundation block fixed to a ground and provided with a tower member constituting a tower,
A pretreatment step of applying a primer to the block surface including the cracked portion;
A method for repairing a concrete foundation block including a tape application step of applying an anticorrosion tape to the block surface. Before the tape application step, a rust prevention treatment step of applying a rust preventive primer to a predetermined part of the steel tower member near the block surface is included,
2. The concrete according to claim 1, wherein in the tape applying step, the anticorrosive tape is applied to the block surface to which the primer has been applied in the pretreatment step and the predetermined portion of the steel tower member to which the primer has been applied in the antirust treatment step. How to repair the basic block. Before the pretreatment step,
A scraping step of scraping off the periphery of a steel tower member including at least a part of the cracked portion so as to form a recess,
A block restoration step of filling the depression with a filler,
The said pre-processing process is a repair method of the concrete foundation block of Claim 1 which applies a primer including the surface of the filler with which the said block restoration process was filled. Including a rust prevention treatment step of applying a rust preventive primer to the steel tower member including a portion exposed as a result of shaving off a part of the block in the shaving step,
4. The concrete according to claim 3, wherein, in the tape applying step, the anticorrosive tape is applied to the block surface to which the primer has been applied in the pretreatment step and the predetermined portion of the steel tower member to which the primer has been applied in the antirust treatment step. How to repair the basic block.   The repair method of the concrete foundation block of any one of Claim 1 to 4 including the finishing process of apply | coating a top coat material to the anticorrosion tape stuck to the block at the said tape sticking process.   6. The anticorrosive tape according to claim 1, wherein the anticorrosive tape is formed by impregnating a porous substrate with a rust preventive compound and forming a film on the surface by oxidative polymerization and having excellent flexibility. Repair method for concrete foundation block according to item 1.

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