JP6155845B2 - Anticorrosion steel, standing structure and sacrificial steel - Google Patents

Description

  The present invention relates to an anti-corrosion steel material, a standing structure, and a sacrificial steel plate provided at a boundary between a front surface side and a rear surface side in a water structure such as a harbor steel structure, a land structure such as a retaining wall and a retaining wall.

  Conventionally, an anticorrosion panel structure using a base material made of a steel sheet bonded to the surface of a steel sheet pile constituting an offshore structure and an offshore structure using the anticorrosion panel structure have been proposed. For example, an anticorrosion panel structure as disclosed in Patent Document 1 has been proposed.

  The anticorrosion panel structure disclosed in Patent Document 1 is intended to prevent corrosion of steel sheet piles in sea areas such as harbors by actively joining a steel sheet to a predetermined part of the steel sheet piles and actively providing a corrosion allowance. A steel sheet having predetermined dimensions (length, width, thickness) is welded to a steel sheet pile.

  Specifically, the anticorrosion panel structure disclosed in Patent Document 1 has a titanium plate or a titanium alloy plate welded to the surface of the substrate by the MIG welding method in a state in which the peripheral portion of the substrate made of a steel plate is left. It has been joined. At this time, the anticorrosion panel structure disclosed in Patent Document 1 is based on the fact that the peripheral portion of the base material made of a steel plate is welded and joined on the surface of the steel sheet pile constituting the marine structure at the construction site. A material, a titanium plate, and a titanium alloy plate will corrode instead of a steel sheet pile.

JP 2004-160481 A

  However, in the anticorrosion panel structure disclosed in Patent Document 1, the end surfaces of the steel plate, the titanium plate, and the titanium alloy plate are formed at right angles to the surface of the steel sheet pile (corrosion protected surface). The end face of the steel sheet and the surface of the steel sheet pile (corroded surface) are joined by fillet welding.

  At this time, since the end face of the steel plate is formed at a right angle, the anticorrosion panel structure disclosed in Patent Document 1 is provided in a state where the fillet welded portion is exposed. For this reason, in the anticorrosion panel structure disclosed in Patent Document 1, the fillet welded portion is exposed, so that the steel plate is detached from the steel sheet pile by the progress of the corrosion of the fillet welded portion. There was a problem that it might be separated.

  In addition, the anticorrosion panel structure disclosed in Patent Document 1 can prevent the corrosion of the fillet welded portion by covering the fillet welded portion with the anticorrosive material. However, the anticorrosion material may be worn out or peeled off due to external factors such as collision of flots in the water area, abrasion, etc., and the corrosion protection of the fillet welded part will be insufficient. was there.

  Furthermore, the anticorrosion panel structure disclosed in Patent Document 1 has a leg length corresponding to a large plate thickness of the steel plate when a steel plate having a large plate thickness is welded and joined according to the assumed progress rate of corrosion. Since fillet welding is performed, there is a problem in that there is a possibility that the welding amount increases and the welding cost increases, or the welding heat supplied from the surface of the steel sheet pile increases and the steel sheet pile deforms.

  Therefore, the present invention has been devised in view of the above-described problems, and the purpose thereof is to suppress an increase in the leg length of the welded portion accompanying an increase in the thickness of the sacrificial steel plate, An object of the present invention is to provide a corrosion-resistant steel material, a standing structure, and a sacrificial steel plate that can suppress the progress of corrosion at a welded portion.

A corrosion-resistant steel material according to a first aspect of the present invention is a corrosion-resistant steel material provided at a boundary separating a first region on the front side and a second region on the back side , the steel member and a predetermined axial direction of the steel member. A sacrificial steel plate attached in the range of, the sacrificial steel plate at the side edge so that the outer side surface opposite to the inner side surface is larger than the inner side surface attached to the steel member. A mounting portion is formed between an inner surface and the outer surface, and a substantially wedge-shaped gap in an acute angle with respect to the surface of the steel member is formed in the mounting portion, and at least the mounting portion The steel member is welded so that a welded portion does not protrude in the left-right direction or the up-down direction from the substantially wedge-shaped gap at an edge boundary with a part of the inner surface.

  The anticorrosive steel material of the second invention is characterized in that, in the first invention, a steel sheet pile, a steel pipe sheet pile or a steel pipe pile is used as the steel member.

  The anticorrosive steel material according to a third aspect of the present invention is characterized in that, in the first aspect or the second aspect, the attachment portion is formed in a tapered shape that inclines stepwise or continuously from the inner surface to the outer surface. To do.

  According to a fourth aspect of the present invention, in the corrosion-resistant steel material according to any one of the first to third aspects, the attachment portion is formed with either one or both of a concave portion and a convex portion from the inner side surface to the outer side surface. Features.

  According to a fifth aspect of the present invention, there is provided the anticorrosion steel material according to any one of the first to fourth aspects, wherein the attachment portion is provided with an anticorrosion material so as to cover at least a welded portion welded to the steel member. And

  According to a sixth aspect of the present invention, there is provided the anticorrosive steel material according to the fifth aspect, wherein the anticorrosive material is provided with the anticorrosive material locking member so that the anticorrosive material locking member fixed by means such as welding is involved. Features.

  According to a seventh aspect of the present invention, there is provided the anticorrosion steel material according to any one of the first to sixth aspects, wherein the sacrificial steel plate has the attachment portion formed on one or both of a left edge and a right edge, and the attachment portion. The steel member is intermittently or continuously welded at an edge boundary with the inner surface.

  According to an eighth aspect of the present invention, there is provided the corrosion-resistant steel material according to any one of the first to seventh aspects, wherein the sacrificial steel plate has the attachment portion formed on one or both of an upper edge and a lower edge, and the attachment. The steel member is intermittently or continuously welded at an edge boundary with the inner surface of the part.

  According to a ninth aspect of the present invention, there is provided the corrosion-resistant steel material according to any one of the first to eighth aspects, wherein the sacrificial steel plate is provided with a corrosion-proof layer between the steel member and the inner side surface.

  According to a tenth aspect of the present invention, in the ninth aspect of the invention, the sacrificial steel sheet is provided with the anticorrosion layer so as to be along the side edge.

The standing structure of the eleventh invention is a standing structure provided at a boundary separating the first region on the front side and the second region on the back side, and a plurality of steel members and the steel members A plurality of steel members, the lower part in the axial direction being driven on the ground, and the upper part in the axial direction at the boundary between the front side and the rear side. The sacrificial steel plate is provided with a side edge between the inner side surface and the outer side surface so that the outer side surface opposite to the inner side surface is larger than the inner side surface attached to the steel member. A mounting portion is formed in between, and a substantially wedge-shaped gap in an acute angle with respect to the surface of the steel member is formed in the mounting portion, and at least a part of the inner surface of the mounting portion in the edge boundary, welded part from the gap of the substantially wedge-shaped in the lateral direction or vertical direction does not protrude Sea urchin, characterized in that it is welded to the steel member.

  The standing structure of the twelfth invention is characterized in that, in the eleventh invention, the steel member is a steel sheet pile, a steel pipe sheet pile or a steel pipe pile.

  The standing structure according to a thirteenth aspect is that, in the eleventh aspect or the twelfth aspect, at least a part of the plurality of steel members is placed in a state where the sacrificial steel plate is welded in advance and the lower portion in the axial direction is grounded. In addition, the upper portion in the axial direction is provided at the boundary between the front side and the back side.

  The standing structure of the fourteenth invention is the eleventh or twelfth invention, wherein at least a part of the plurality of steel members has an axial lower portion placed on the ground and an axial upper portion on the front side. The sacrificial steel plate is welded in a state of being provided at the boundary between the rear surface side and the rear surface side.

  The standing structure according to a fifteenth aspect is the fourteenth aspect, wherein the plurality of steel members are formed with joint portions at either one or both of the left end portion and the right end portion, and the sacrificial steel plates are adjacent to each other. The plurality of steel members are welded to the plurality of steel members so as to straddle the joint portions of the plurality of steel members.

The sacrificial steel plate of the sixteenth invention is a sacrificial steel plate attached to a steel member having a standing structure provided at a boundary separating the first region on the front side and the second region on the back side. An attachment portion is formed between the inner side surface and the outer side surface at a side edge so that the outer side surface opposite to the inner side surface is larger than the inner side surface to be attached. A substantially wedge-shaped gap in an acute angle with respect to the surface is formed in the mounting portion, and at the edge boundary with the inner surface of at least a part of the mounting portion, the left and right sides of the substantially wedge-shaped gap It welds to the said steel member so that a welding site | part may not protrude in a direction or an up-down direction .

  The sacrificial steel plate according to a seventeenth aspect of the present invention is characterized in that, in the sixteenth aspect, the attachment portion is formed in a tapered shape that inclines stepwise or continuously from the inner surface to the outer surface.

  The sacrificial steel plate according to an eighteenth aspect of the present invention is characterized in that, in the sixteenth aspect or the seventeenth aspect, the attachment portion is formed with either one or both of a concave portion and a convex portion from the inner side surface to the outer side surface. .

  According to the first to tenth inventions, the attachment portion is formed at the side edge of the sacrificial steel plate so that the outer side surface is larger than the inner side surface of the sacrificial steel plate. The part is in a deepened state, and the welded part is not exposed. At this time, according to the first invention to the tenth invention, the welded part can be protected by the outer surface of the sacrificial steel plate, and it is possible to prevent the drifting object or the like in the water area from colliding with the welded part, scratching, or the like. This makes it possible to prevent the sacrificial steel plate from being detached from the steel member.

  In particular, according to the first to third inventions, it is not necessary to increase the leg length of the welded part, it is possible not only to suppress an increase in welding amount, and to reduce the welding cost. The increase in welding heat supplied from the welding site to the surface of the steel member can be suppressed, and deformation of the steel member can be prevented.

  In particular, according to the fourth and fifth aspects of the invention, one or both of a concave portion and a convex portion are formed on the mounting portion of the sacrificial steel plate from the inner side surface to the outer side surface of the sacrificial steel plate, thereby covering the welding site. Since the anticorrosive material provided in this way has improved strength in the shear direction, the anticorrosive material is firmly fixed to the mounting part, and the anticorrosive material collides with drifting objects etc. in the water area. Even if it exists, it becomes possible to prevent detachment | desorption from the attachment part of an anticorrosion material.

  In particular, according to the fifth invention, the anticorrosive material provided so as to cover the welded portion is also in a state of being recessed in a substantially wedge-shaped gap at the attachment portion of the sacrificial steel plate, and the anticorrosive material is not exposed. Thus, the anticorrosive material is protected on the outer surface of the sacrificial steel plate. At this time, according to the fifth invention, it is possible to prevent the anti-corrosion material from colliding and rubbing in the water, etc., and to prevent the anti-corrosion material from being worn and peeled off. It is possible to prevent the sacrificial steel plate from being detached from the steel member.

  In particular, according to the sixth invention, the anticorrosion material is reinforced by the anticorrosion material locking member, and it is possible to enhance the effect of preventing the anticorrosion material from peeling off and falling off.

  In particular, according to the seventh and eighth inventions, the sacrificial steel plate is welded by intermittently or continuously welding the attachment portions of the sacrificial steel plate to the surface of the steel member at the four corners of the side edge of the sacrificial steel plate. It is possible to suppress an increase in the proportion of the welded portion with respect to the side edge of the steel, and it is possible not only to reduce the welding cost but also to increase the welding heat supplied from the welded portion to the surface of the steel member. It is possible to suppress the deformation of the steel member.

  In particular, according to the ninth and tenth inventions, the anticorrosion layer is provided between the surface of the steel member and the inner surface of the sacrificial steel plate, so that the anticorrosion material is dropped due to an unexpected situation. However, the anticorrosion layer can be made to function as a safety allowance when it takes time to start repairing the location where the anticorrosion material is dropped, and the surface of the steel sheet pile can be protected from corrosion by the anticorrosion layer.

  According to the eleventh to fifteenth inventions, the attachment portion is formed at the side edge of the sacrificial steel plate so that the outer side surface is larger than the inner side surface of the sacrificial steel plate. It becomes possible to protect the welded part on the outer surface of the sacrificial steel sheet, and to prevent the drifting material etc. in the water from colliding with the welded part and scratching the welded part. It is possible to prevent detachment from the manufactured member.

  According to the eleventh to fifteenth inventions, it is not necessary to increase the leg length of the welded portion even when the thickness of the sacrificial steel plate is increased in accordance with the assumed corrosion progress rate or the like. It is possible to suppress an increase in the welding amount and not only to reduce the welding cost, but also to suppress an increase in welding heat supplied from the welding site to the surface of the steel member, It becomes possible to prevent deformation of the steel member.

  In particular, according to the thirteenth invention, since the sacrificial steel plate is provided in a state of being welded to the steel member in advance, the sacrificial steel plate can be stabilized to the steel member without requiring welding of the attachment portion of the sacrificial steel plate by field work. And can be fixed.

  In particular, according to the fourteenth invention, since the sacrificial steel plate is welded in the field while a plurality of steel members are provided at the boundary between the front side and the back side, the steel material is severely corroded in the ocean and at the port. It becomes possible to easily fix the sacrificial steel plate by retrofitting to a concentrated corrosion site or a site where the bottom sediment (sand, gravel, etc.) moves sharply.

  In particular, according to the fifteenth invention, the sacrificial steel plate is welded to the plurality of steel members so as to straddle the joint portions of the plurality of adjacent steel members so as to cover the joint portions of the steel members. Since the sacrificial steel plate is provided, the joint portion of the steel member can be protected from the corrosion of the steel material in the ocean and the harbor and the abrasion due to the movement of the bottom sediment (sand, gravel, etc.).

  According to the sixteenth to eighteenth inventions, a steel plate having a predetermined plate thickness can be used as necessary, and the plate thickness of the steel plate can be partially increased. , The thickness of the sacrificial steel plate can be increased as necessary at sites where the corrosion of steel materials is severe in the ocean and at harbors, and where the bottom sediment (sand, gravel, etc.) is moving rapidly. It becomes possible to arbitrarily improve the corrosion resistance of the manufactured member.

  According to the sixteenth to eighteenth inventions, the sacrificial steel plate can be fixed to the steel member without using an organic material or the like. Even if the bottom sediment (sand, gravel, etc.) collides, it is possible to prevent the sacrificial steel plate from being broken and damaged, so that the steel member can be reliably protected by the sacrificial steel plate. Become.

It is a perspective view which shows the standing structure to which this invention is applied. It is a perspective view which shows 1st Embodiment of the anticorrosion steel material to which this invention is applied. It is a perspective view which shows 1st Embodiment of the sacrificial steel plate to which this invention is applied. (A) is a top view which shows 1st Embodiment of the sacrificial steel plate to which this invention is applied, (b) is the front view. (A) is a side view which shows the attaching part formed over the full length in the left side edge and right side edge of the sacrificial steel plate to which this invention is applied, (b) was formed in the part. It is a side view which shows an attaching part. (A) is a side view which shows the attaching part formed over the full length in the upper edge and lower edge of the sacrificial steel plate to which this invention is applied, (b) is formed in the part. It is a side view which shows the attachment part. (A) is an enlarged view which shows the attachment part of the sacrificial steel plate to which this invention is applied, (b) is an enlarged view which shows the 1st modification, (c) is the 2nd modification. It is an enlarged view shown. (A) is an enlarged view which shows the 3rd modification of the attachment part of the sacrificial steel plate to which this invention is applied, (b) is an enlarged view which shows the 4th modification, (c) It is an enlarged view which shows a 5th modification. (A) is a top view which shows 1st Embodiment of the anti-corrosion steel material to which this invention is applied, (b) is the front view. (A) is an enlarged plan view which shows the attachment part of the sacrificial steel plate in the anticorrosion steel material to which this invention is applied, (b) is the enlarged front view. (A) is a front view which shows the anticorrosion layer provided along the side edge of the sacrificial steel plate in the anticorrosion steel material to which this invention is applied, (b) is covering the whole inner surface of the sacrificial steel plate. It is a front view which shows the anticorrosion layer provided. It is a front view which shows 1st Embodiment of the standing structure to which this invention is applied. It is a side view which shows 1st Embodiment of the standing structure to which this invention is applied. (A) is a top view which shows 1st Embodiment of the standing structure to which this invention is applied, (b) is a top view which shows the 1st modification of the sacrificial steel plate, (c), It is a top view which shows the 2nd modification of the sacrificial steel plate. (A) is a side view which shows the state by which the sacrificial steel plate was welded to the front side of the steel member in the standing structure to which this invention was applied, (b) was the sacrificial steel plate welded to the back side. It is a side view which shows a state. (A) is a side view which shows the state by which the sacrificial steel plate was welded to the front side of the steel member embedded in the upper concrete in the standing structure to which this invention is applied, (b) is the back side. It is a side view which shows the state by which the sacrificial steel plate was welded. It is a side view which shows the state by which the standing structure to which this invention was applied was used for the tie rod type steel sheet pile wall. It is an enlarged plan view which shows the state by which the sacrificial steel plate was welded so that the joint part of the steel sheet pile in the standing structure to which this invention was applied was straddled. It is an enlarged plan view which shows the other state to which the sacrificial steel plate was welded so that the joint part of the steel sheet pile in the standing structure to which this invention was applied was straddled. It is an enlarged plan view which shows the welding site | part in 1st Embodiment of the corrosion-resistant steel materials to which this invention is applied. It is an enlarged plan view which shows the welding site | part of the modification of the attachment part of the sacrificial steel plate in the corrosion-proof steel material to which this invention is applied. It is a perspective view which shows the state by which the sacrificial steel plate was attached to the steel pipe sheet pile in 2nd Embodiment of the corrosion-resistant steel material to which this invention is applied. It is a perspective view which shows the state by which the sacrificial steel plate was attached to the steel pipe pile in 2nd Embodiment of the corrosion-resistant steel materials to which this invention is applied. It is a perspective view which shows the other state by which the sacrificial steel plate was attached to the steel pipe pile in 2nd Embodiment of the corrosion-resistant steel material to which this invention is applied. (A) is a top view which shows the state by which the sacrificial steel plate was attached to the steel pipe sheet pile in 2nd Embodiment of the corrosion-resistant steel material to which this invention is applied, (b) is the front view. (A) is a top view which shows the state by which the sacrificial steel plate was attached to the steel pipe pile in 2nd Embodiment of the corrosion-resistant steel material to which this invention is applied, (b) is the front view. (A) is a top view which shows the other state by which the sacrificial steel plate was attached to the steel pipe pile in 2nd Embodiment of the corrosion-resistant steel material to which this invention is applied, (b) is the front view. (A) is a front view which shows the state by which the steel pipe sheet pile was used for the steel members in 2nd Embodiment of the standing structure to which this invention is applied, (b) is the side view. (A) is a front view which shows the state by which the steel pipe pile was used for the steel members in 2nd Embodiment of the standing structure to which this invention is applied, (b) is the side view. (A) is a front view which shows the other state by which the steel pipe pile was used for the steel members in 2nd Embodiment of the standing structure to which this invention is applied, (b) is the side view. It is an enlarged plan view which shows the state by which the sacrificial steel plate was welded so that the joint part of the steel pipe sheet pile in the standing structure to which this invention was applied was straddled. It is an enlarged plan view which shows the other state to which the sacrificial steel plate was welded so that the joint part of the steel pipe sheet pile in the standing structure to which this invention was applied was straddled. It is an enlarged plan view which shows the welding site | part in 2nd Embodiment of the corrosion-resistant steel materials to which this invention is applied. (A) is an enlarged plan view which shows the member for an anticorrosion material latching of the attachment part of the sacrificial steel plate in the anticorrosion steel material to which this invention is applied, (b) is the enlarged front view.

  Hereinafter, the form for implementing the sacrificial steel plate 1, the corrosion-resistant steel material 2, and the standing structure 3 to which this invention is applied is demonstrated in detail, referring drawings.

  As shown in FIG. 1, the standing structure 3 to which the present invention is applied is mainly a water area structure such as a harbor steel structure, a land structure such as a retaining wall, a retaining wall, and the like. B is provided at the boundary with B. In the standing structure 3 to which the present invention is applied, a steel sheet pile 5, a steel pipe sheet pile 6, a steel pipe pile 7 or the like is placed on the water bottom ground 90, and a plurality of steel sheet piles 5 or steel pipe sheet piles 6 are provided. By arranging them, the wall structure is formed. The steel sheet pile 5, the steel pipe sheet pile 6, or the steel pipe pile 7 or the like is not limited to this, and can be embedded in the water bottom ground 90 or can be erected on the footing concrete.

  The anticorrosion steel material 2 to which the present invention is applied is provided at the boundary between the front side A and the back side B in the first embodiment. As shown in FIG. 2, a steel member using a steel sheet pile 5 is used. 4 and a sacrificial steel plate 1 attached in a predetermined range in the axial direction Y of the steel sheet pile 5.

  As shown in FIG. 3, the sacrificial steel plate 1 to which the present invention is applied is a substantially flat steel plate as shown in FIG. 3. The outer side surface 12 and the side edges 13 on the top, bottom, left and right.

  The sacrificial steel plate 1 to which the present invention is applied includes at least part of the upper edge 13a, the lower edge 13b, the left edge 13c, and the right edge 13d of the side edge 13, as shown in FIG. An attachment portion 14 is formed between the inner surface 11 and the outer surface 12 so that the outer surface 12 is larger than the outer surface 12.

  As shown in FIG. 5 (a), the sacrificial steel plate 1 to which the present invention is applied has a mounting portion 14 over the entire length at one or both of the left side edge 13c and the right side edge 13d of the side edge 13. It is formed. Moreover, the sacrificial steel plate 1 to which the present invention is applied, as shown in FIG. 5 (b), the attachment portion 14 is formed only in part at one or both of the left edge 13c and the right edge 13d. Also good.

  As shown in FIG. 6A, the sacrificial steel plate 1 to which the present invention is applied has a mounting portion 14 extending over the entire length at one or both of the upper edge 13 a and the lower edge 13 b of the side edge 13. May be formed. Further, as shown in FIG. 6 (b), the sacrificial steel plate 1 to which the present invention is applied has the attachment portion 14 formed only in a part at one or both of the upper edge 13a and the lower edge 13b. May be.

  As shown in FIG. 7A, the attachment portion 14 is formed in a tapered shape that continuously inclines from the inner surface 11 to the outer surface 12. Moreover, as shown in FIG.7 (b), the attaching part 14 may be formed in the taper shape in the 1st modification, in which the angle which inclines from the inner surface 11 to the outer surface 12 is changed in steps. Good. Furthermore, as shown in FIG. 7C, the attachment portion 14 may be formed in a tapered shape that is curved and inclined from the inner surface 11 to the outer surface 12 in the second modification.

  As shown in FIG. 8A, the mounting portion 14 is formed with a concave portion 14a from the inner side surface 11 to the outer side surface 12 as a result of blasting or the like performed on the side edge 13. The Moreover, as shown in FIG.8 (b), as for the attaching part 14, the convex part 14b may be formed in the side edge 13 in the 4th modification. Furthermore, as shown in FIG. 8C, the attachment portion 14 may be formed with both the concave portion 14a and the convex portion 14b in the fifth modification.

  As shown in FIG. 9A, the anticorrosion steel material 2 to which the present invention is applied has an attachment portion 14 formed on the side edge 13 of the sacrificial steel plate 1 and at least a part of the inner surface 11 of the attachment portion 14. The sacrificial steel plate 1 is welded to the surface 41 of the steel sheet pile 5 at the edge boundary 15.

  At this time, as shown in FIG. 9B, the anticorrosion steel material 2 to which the present invention is applied is a mounting portion 14 formed on at least a part of the side edge 13 of the sacrificial steel plate 1, and the surface 41 of the steel sheet pile 5. The sacrificial steel plate 1 is welded intermittently or continuously. For example, the sacrificial steel plate 1 is welded at the four corners or the middle portion of the left edge 13c and the right edge 13d of the side edge 13 of the sacrificial steel plate 1. It is good also as what is fixed.

  Moreover, the anticorrosion steel material 2 to which the present invention is applied has a welded portion 8 welded to the steel sheet pile 5 in a state where the sacrificial steel plate 1 is welded to the surface 41 of the steel sheet pile 5 as shown in FIG. An epoxy putty material or the like is attached to the attachment portion 14 of the sacrificial steel plate 1 so as to cover, and the anticorrosion material 81 is provided. As this epoxy-based putty material, an underwater curing putty or the like that is hardened in close contact with the steel surface even in the water 91 is used.

  At this time, as shown in FIG. 10 (b), the anticorrosive steel material 2 to which the present invention is applied is only the welded portion 8 where the attachment portion 14 of the side edge 13 of the sacrificial steel plate 1 is welded to the surface 41 of the steel sheet pile 5. Instead, the anticorrosion material 81 may be provided so as to cover the side edge 13 of the sacrificial steel plate 1 over the entire length.

  Furthermore, the anticorrosion steel material 2 to which the present invention is applied includes the surface 41 of the steel sheet pile 5 and the sacrificial steel plate 1 with the sacrificial steel plate 1 welded to the surface 41 of the steel sheet pile 5 as shown in FIG. An anticorrosion layer 82 is provided between the inner side surface 11 and an anticorrosion solvent such as a cyanoacrylate instantaneous adhesive.

  At this time, the anticorrosion steel material 2 to which the present invention is applied is the attachment portion 14 of the sacrificial steel plate 1 with the sacrificial steel plate 1 fixed to the steel sheet pile 5 as shown in FIGS. Is injected between a surface 41 of the steel sheet pile 5 and the inner side surface 11 of the sacrificial steel plate 1 from a portion where the steel sheet is not welded. An anticorrosion layer 82 is provided along the edge 13. The anticorrosion layer 82 is not limited to this, and as shown in FIGS. 10A and 11B, the sacrificial steel plate 1 is provided between the surface 41 of the steel sheet pile 5 and the inner side surface 11 of the sacrificial steel plate 1. It may be provided over the entire side surface 11.

  In the first embodiment, the standing structure 3 to which the present invention is applied includes a plurality of steel sheet piles 5 and a sacrificial steel plate 1 attached to the steel sheet piles 5 in a predetermined range in the axial direction Y, as shown in FIG. Prepare. As shown in FIG. 13, the plurality of steel sheet piles 5 have a lower portion 4 a in the axial direction Y placed or embedded in the bottom ground 90, and an upper portion 4 b in the axial direction Y is formed between the front side A and the rear side B. It will be provided at the boundary.

  For example, as shown in FIG. 14, the steel sheet pile 5 is a hat type provided with a flange 52, a pair of webs 53, a pair of arm portions 54, and a pair of joint portions 45. The steel sheet pile 5 is not limited to this, and a U-shaped one or the like may be used. The pair of webs 53 are continuously provided by being inclined from both sides of the flange 52 in the width direction X of the steel sheet pile 5. The pair of arm portions 54 are continuously provided from the respective webs 53 so as to be substantially parallel to the flange 52. The pair of joint portions 45 are formed at the left end portion and the right end portion of the steel sheet pile 5 continuously from each arm portion 54. The plurality of steel sheet piles 5 are connected in the width direction X of the steel sheet pile 5 by fitting the other joint portion 45 to one joint portion 45 of the plurality of adjacent steel sheet piles 5.

  The steel sheet pile 5 is fixed by welding the sacrificial steel plate 1 to the flange 52 as shown in FIG. In the first modification, the steel sheet pile 5 is fixed by welding a substantially flat sacrificial steel plate 1 to each of the flange 52 and the web 53, as shown in FIG. 14 (b). Furthermore, as shown in FIG. 14 (c), the steel sheet pile 5 uses the sacrificial steel plate 1 in which the bent portion 16 is formed, and the sacrificial steel plate 1 continues from the flange 52 to the web 53. And may be fixed.

  As shown in FIG. 13, the standing structure 3 to which the present invention is applied has a plurality of steel sheet piles 5 and a front side A in a state where the sacrificial steel plate 1 is pre-welded to at least a part of the plurality of steel sheet piles 5. Provided at the boundary with the back side B. The standing structure 3 to which the present invention is applied is not limited thereto, and a plurality of steel sheet piles 5 are provided at the boundary between the front side A and the back side B, and at least a part of the plurality of steel sheet piles 5 The sacrificial steel plate 1 may be welded on site.

  In the standing structure 3 to which the present invention is applied, the sacrificial steel plate 1 is welded and fixed to a predetermined range L in the axial direction Y of the steel sheet pile 5. This predetermined range L is determined by the structural design (calculation) and the installation environment (deterioration environment, corrosive environment, drift sand / sand flow environment, drift material environment, etc.), for example, a range covering a region where a large bending moment acts, The effective range for suppressing the displacement of the steel sheet pile 5 is determined. Further, the predetermined range L may be determined as a range that covers the vicinity of the tidal zone where intensive corrosion may occur in a standard marine environment. Further, the predetermined range L may be determined as a range that covers up to a predetermined depth with respect to the underwater ground 90, for example, when scouring due to the influence of waves and river flows is considered.

  As shown in FIG. 15A, the standing structure 3 to which the present invention is applied has a sacrificial steel plate 1 on the front side A of the steel sheet pile 5 from the bottom ground 90 to the water 91 in the self-supporting steel sheet pile wall. It may be welded and fixed. Further, the standing structure 3 to which the present invention is applied has the sacrificial steel plate 1 on the back side B of the steel sheet pile 5 between the self-supporting steel sheet pile wall and the backfill 92 as shown in FIG. It may be welded and fixed. Thereby, the standing structure 3 to which the present invention is applied can prevent the steel sheet pile 5 from being worn by the sand or the like on the back side B when the sand or the like moves strongly on the bottom ground 90.

  In the standing structure 3 to which the present invention is applied, the upper portion 4 b of the steel sheet pile 5 in the axial direction Y may be embedded in the upper concrete 93 as shown in FIG. At this time, in the standing structure 3 to which the present invention is applied, the sacrificial steel plate 1 is continuously attached to the front side A of the steel sheet pile 5 from the bottom ground 90 to the underwater 91 and the upper concrete 93. In the standing structure 3 to which the present invention is applied, the sacrificial steel plate 1 is continuously attached to the back side B of the steel sheet pile 5 from the bottom bottom ground 90 to the underwater 91 and the upper concrete 93 as shown in FIG. May be.

  As shown in FIG. 17, the standing structure 3 to which the present invention is applied may be used for a tie rod type (canceling type) steel sheet pile wall. Are connected by a tie rod 95 interposing a receiving beam and a support plate. At this time, as shown in FIGS. 18 and 19, the standing structure 3 to which the present invention is applied has the steel sheet pile 5 in a state where a plurality of steel sheet piles 5 are provided at the boundary between the front side A and the back side B. The joint portion 45 is disposed on the front side A of the flange 52 of the steel plate, and the sacrificial steel plate 1 is welded to the plurality of steel sheet piles 5 by field work so as to straddle the joint portions 45 of the plurality of adjacent steel sheet piles 5.

  The sacrificial steel plate 1 to which the present invention is applied includes a clad steel plate in which a metal having high corrosion resistance and wear resistance such as titanium and stainless steel is used on the front side A, and hot-dip plating and electroplating are applied to the front side A of the steel plate. The plated plated steel sheet may be used to improve the corrosion resistance and wear resistance of the sacrificial steel sheet 1. At this time, the sacrificial steel plate 1 to which the present invention is applied is a means such as an anti-corrosion method as a countermeasure against corrosion due to the contact of different metals at the interface between the steel plate and titanium, stainless steel or the like, or at the interface between the steel plate and hot dipping, electroplating, etc. It is possible to prevent the sacrificial steel plate 1 from being corroded due to a potential difference between different metals.

  As the sacrificial steel plate 1 to which the present invention is applied, a steel plate having a predetermined thickness can be used as needed, and the thickness of the steel plate can be partially increased. As a result, the sacrificial steel plate 1 to which the present invention is applied, as shown in FIG. 15, in the axial direction Y of the steel sheet pile 5, the corrosive corrosion site where the steel material is severely corroded in the ocean and the harbor, and the bottom sediment (sand, The thickness of the sacrificial steel plate 1 can be increased as necessary at a site where the movement of sand and gravel is intense, and the corrosion resistance performance of the steel sheet pile 5 can be arbitrarily improved.

  The sacrificial steel plate 1 to which the present invention is applied can fix the sacrificial steel plate 1 to the steel sheet pile 5 without using an organic material or the like. Even if the bottom sediment (sand, gravel, etc.) collides, the sacrificial steel plate 1 can be prevented from cracking and being damaged, so that the steel sheet pile 5 can be reliably protected by the sacrificial steel plate 1. It becomes possible.

  The anticorrosion steel material 2 to which the present invention is applied is attached to the side edge 13 of the sacrificial steel plate 1 so that the outer surface 12 is larger than the inner surface 11 of the sacrificial steel plate 1 as shown in FIG. Since the portion 14 is formed, the substantially wedge-shaped gap G is formed in a state where the attachment portion 14 of the sacrificial steel plate 1 is at an acute angle with respect to the surface 41 of the steel sheet pile 5. At this time, in the corrosion-resistant steel material 2 to which the present invention is applied, the welded portion 8 is recessed in the substantially wedge-shaped gap G at the attachment portion 14 of the sacrificial steel plate 1, and the welded portion 8 is not exposed. The welded portion 8 can be protected by the outer surface 12 of the sacrificial steel plate 1.

  As a result, the anticorrosion steel material 2 to which the present invention is applied can protect the welded portion 8 with the outer surface 12 of the sacrificial steel plate 1, and prevent the drifting material or the like in the water area from colliding with the welded portion 8 and scratching. This makes it possible to prevent the sacrificial steel plate 1 from being detached from the steel sheet pile 5.

  Further, in the anticorrosive steel material 2 to which the present invention is applied, the anticorrosive material 81 provided so as to cover the welded portion 8 is also recessed in the substantially wedge-shaped gap G at the attachment portion 14 of the sacrificial steel plate 1. It is assumed that 81 is not exposed, and the anticorrosion material 81 is protected by the outer surface 12 of the sacrificial steel plate 1.

  Thereby, the anticorrosive steel material 2 to which the present invention is applied can prevent the anticorrosive material 81 from colliding with the drifting material in the water area, rubbing, etc., and prevent the anticorrosive material 81 from being worn and peeled. The weld site 8 is protected by the anticorrosive material 81, and the detachment of the sacrificial steel plate 1 from the steel sheet pile 5 can be prevented.

  Furthermore, as shown in FIG. 20B, the anticorrosion steel material 2 to which the present invention is applied is sacrificed even when the thickness of the sacrificial steel plate 1 is increased according to the assumed progress rate of corrosion. Since the welded part 8 is provided in the substantially wedge-shaped gap G at the attachment portion 14 of the steel plate 1 and the welded part 8 is protected by the anticorrosive material 81, it is necessary to increase the leg length W of the welded part 8. It will not be.

  Thereby, the anticorrosion steel material 2 to which the present invention is applied does not need to increase the leg length W of the welded part 8, can suppress an increase in welding amount, and can only reduce the welding cost. In addition, an increase in welding heat supplied from the welding site 8 to the surface 41 of the steel sheet pile 5 can be suppressed, and deformation of the steel sheet pile 5 can be prevented.

  As shown in FIG. 9, the anticorrosive steel material 2 to which the present invention is applied is welded to the surface 41 of the steel sheet pile 5 at the four corners and the middle portion of the side edge 13 of the sacrificial steel plate 1. Thus, the sacrificial steel plate 1 is fixed to the steel sheet pile 5. Thereby, the anticorrosion steel material 2 to which the present invention is applied can suppress an increase in the proportion of the welded portion 8 with respect to the side edge 13 of the sacrificial steel plate 1 and can reduce the welding cost. The increase in the welding heat supplied from the welding site 8 to the surface 41 of the steel sheet pile 5 can be suppressed, and the deformation of the steel sheet pile 5 can be prevented.

  The anticorrosion steel material 2 to which the present invention is applied is, as shown in FIG. 21, from the inner side surface 11 to the outer side surface 12 of the sacrificial steel plate 1, any one of a plurality of concave portions 14 a and convex portions 14 b on the mounting portion 14 of the sacrificial steel plate 1. Alternatively, by forming both, the strength in the shear direction S of the anticorrosive material 81 provided so as to cover the welded portion 8 is improved. Thereby, the anticorrosion steel material 2 to which the present invention is applied is the one in which the anticorrosion material 81 is firmly fixed to the mounting portion 14 by improving the strength of the anticorrosion material 81 in the shear direction S. Even when a drifting object or the like collides, it is possible to prevent the anticorrosive material 81 from being detached from the attachment portion 14.

  As shown in FIG. 10A, the anticorrosion steel material 2 to which the present invention is applied is provided with an anticorrosion layer 82 between the surface 41 of the steel sheet pile 5 and the inner surface 11 of the sacrificial steel sheet 1. Even when seawater or the like enters between the surface 41 of the steel plate 5 and the inner surface 11 of the sacrificial steel plate 1, it is possible to prevent the corrosion from proceeding from the surface 41 of the steel sheet pile 5. Thereby, even if the anticorrosion steel material 2 to which the present invention is applied is a case where the anticorrosion material 81 is dropped due to an unexpected situation, as a safety fee when it takes time to start repairing the dropped portion of the anticorrosion material 81. The anticorrosion layer 82 can function, and the anticorrosion layer 82 can protect the surface 41 of the steel sheet pile 5 from corrosion.

  Since the standing structure 3 to which the present invention is applied is provided in a state where the sacrificial steel plate 1 is welded in advance as shown in FIGS. 12 and 13, it is necessary to weld the attachment portion 14 of the sacrificial steel plate 1 by field work. Without it, it becomes possible to stably fix the sacrificial steel plate 1 to the steel sheet pile 5. When the sacrificial steel plate 1 is welded in a field operation in a state where a plurality of steel sheet piles 5 are provided at the boundary between the front side A and the back side B, the standing structure 3 to which the present invention is applied is Thus, it becomes possible to easily fix the sacrificial steel plate 1 to a concentrated corrosion site where the steel material is severely corroded or a site where the bottom sediment (sand, gravel, etc.) is drastically moved.

  As shown in FIGS. 18 and 19, the standing structure 3 to which the present invention is applied has a plurality of adjacent steels when the joint portion 45 is disposed on the front side A of the flanges 52 of the plurality of steel sheet piles 5. The sacrificial steel plate 1 is welded to the plurality of steel sheet piles 5 so as to straddle the joint portion 45 of the sheet pile 5. Thereby, in the standing structure 3 to which the present invention is applied, since the sacrificial steel plate 1 is provided so as to cover the joint portion 45 of the steel sheet pile 5, corrosion of the steel material in the ocean and the harbor, bottom sediment (sand, It is possible to protect the joint portion 45 of the steel sheet pile 5 from wear due to movement of sand and gravel.

  Next, a second embodiment of the anticorrosion steel material 2 to which the present invention is applied will be described. In addition, about the component same as the component mentioned above, the description below is abbreviate | omitted by attaching | subjecting the same code | symbol.

  In the second embodiment, as shown in FIGS. 22, 23, and 24, the anticorrosion steel material 2 to which the present invention is applied is a steel member 4 in which the steel pipe sheet pile 6 or the steel pipe pile 7 is used, and the steel pipe sheet pile 6 or And a sacrificial steel plate 1 attached in a predetermined range in the axial direction Y of the steel pipe pile 7.

  In the second embodiment, the sacrificial steel plate 1 to which the present invention is applied is used by curving a substantially flat steel plate as shown in FIGS. 25, 26, and 27 and attached to the steel pipe sheet pile 6 or the steel pipe pile 7. An inner side surface 11, an outer side surface 12 opposite to the inner side surface 11, and upper and lower side edges 13.

  The sacrificial steel plate 1 to which the present invention is applied has at least a part of the upper side edge 13 a, the lower side edge 13 b, the left side edge 13 c and the right side edge 13 d of the side edge 13, which is on the outer side surface 12 rather than the inner side surface 11. A mounting portion 14 is formed between the inner side surface 11 and the outer side surface 12 so as to be larger. The attachment portion 14 may be formed in a tapered shape that inclines stepwise or continuously from the inner side surface 11 to the outer side surface 12, and either one or both of the concave portion 14a and the convex portion 14b may be formed.

  As shown in FIG. 25, the anticorrosion steel material 2 to which the present invention is applied is a left end edge 13 c and a right end edge 13 d of the sacrificial steel plate 1 on the surface 41 of the steel pipe sheet pile 6, and the attachment portion 14 is a joint portion of the steel pipe sheet pile 6. 45, and is welded at an edge boundary 15 with at least a part of the inner surface 11 of the mounting portion 14. Moreover, as shown in FIG. 26, the anticorrosive steel material 2 to which the present invention is applied has a left edge 13 c and a right edge 13 d of the sacrificial steel plate 1 on the surface 41 of the steel pipe pile 7. It is welded at the edge boundary 15. Furthermore, as shown in FIG. 27, the anticorrosive steel material 2 to which the present invention is applied has the upper end edge 13 a and the lower end edge 13 b of the sacrificial steel plate 1 on the surface 41 of the steel pipe pile 7, and the attachment portion 14 is the inner surface 11. May be welded at the edge boundary 15.

  At this time, the anticorrosion steel material 2 to which the present invention is applied is formed on at least a part of the side edge 13 of the sacrificial steel plate 1 as shown in FIGS. 25 (b), 26 (b), and 27 (b). The mounting portion 14 is welded to the surface 41 of the steel pipe sheet pile 6 or the steel pipe pile 7, and the upper edge 13a, the lower edge 13b, the left edge 13c, and the right edge of the side edge 13 of the sacrificial steel plate 1. The sacrificial steel plate 1 is fixed to the steel pipe sheet pile 6 or the steel pipe pile 7 at the four corners and the middle part of the edge 13d.

  In the second embodiment, the upright structure 3 to which the present invention is applied has a plurality of steel pipe sheet piles 6 or steel pipe piles 7 and a steel pipe sheet pile 6 or steel pipe pile 7 with a shaft as shown in FIGS. And a sacrificial steel plate 1 attached in a predetermined range in the direction Y. The plurality of steel pipe sheet piles 6 or the steel pipe piles 7 are formed such that the lower portion 4a in the axial direction Y is driven into the bottom bottom ground 90, and the upper portion 4b in the axial direction Y is provided at the boundary. It will be provided at the boundary.

  In the standing structure 3 to which the present invention is applied, the plurality of steel pipe sheet piles 6 or the steel pipe piles 7 are front side A in a state where the sacrificial steel plate 1 is welded to at least a part of the plurality of steel pipe sheet piles 6 or the steel pipe piles 7 in advance. And the rear side B. The standing structure 3 to which the present invention is applied is not limited thereto, and a plurality of steel pipe sheet piles 6 or steel pipe piles 7 or steel pipe piles 7 are provided at the boundary between the front side A and the back side B. The sacrificial steel plate 1 may be welded to at least a part of the pile 7 by field work.

  As shown in FIGS. 31 and 32, the standing structure 3 to which the present invention is applied has a plurality of adjacent steel pipe sheet piles in a state where the plurality of steel pipe sheet piles 6 are provided at the boundary between the front side A and the back side B. 6, the sacrificial steel plate 1 may be welded to the plurality of steel pipe sheet piles 6 in the field work. Thereby, in the standing structure 3 to which the present invention is applied, since the sacrificial steel plate 1 is provided so as to cover the joint portion 45 of the steel pipe sheet pile 6, corrosion of the steel material in the ocean and the harbor, bottom sediment (sand, It is possible to protect the joint portion 45 of the steel pipe sheet pile 6 from wear due to movement of sand and gravel.

  In the second embodiment, the sacrificial steel plate 1 to which the present invention is applied has a concentrated corrosion site where the steel material is severely corroded in the ocean and the harbor in the axial direction Y of the steel pipe sheet pile 6 or the steel pipe pile 7, and the bottom sediment (sand, The thickness of the sacrificial steel plate 1 can be increased as necessary at a site where the movement of sand and gravel is intense, and the corrosion resistance performance of the steel pipe sheet pile 6 or the steel pipe pile 7 can be arbitrarily improved.

  As shown in FIG. 33, the anticorrosion steel material 2 to which the present invention is applied has a side edge of the sacrificial steel plate 1 so that the outer side surface 12 is larger than the inner side surface 11 of the sacrificial steel plate 1 as shown in FIG. Since the attachment portion 14 is formed at 13, a substantially wedge-shaped gap G is formed at the attachment portion 14 of the sacrificial steel plate 1. At this time, the anticorrosion steel material 2 to which the present invention is applied can protect the welded portion 8 with the outer surface 12 of the sacrificial steel plate 1, and prevent the drifting material or the like in the water area from colliding with the welded portion 8 and scratching. It becomes possible to do. In the anticorrosion steel material 2 to which the present invention is applied, the anticorrosion material 81 provided so as to cover the welded portion 8 is also protected by the outer side surface 12 of the sacrificial steel plate 1, so that the anticorrosion material 81 is worn and peeled off. It is possible to prevent the welded portion 8 from being protected by the anticorrosive material 81 and to prevent the sacrificial steel plate 1 from being detached from the steel pipe sheet pile 6 or the steel pipe pile 7.

  The anticorrosive steel material 2 to which the present invention is applied is the attachment portion 14 of the sacrificial steel plate 1 in the second embodiment, even when the thickness of the sacrificial steel plate 1 is increased according to the assumed progress rate of corrosion. Thus, since the welded part 8 is provided in the substantially wedge-shaped gap G and the welded part 8 is protected by the anticorrosive material 81, it is not necessary to increase the leg length W of the welded part 8. Thereby, the anticorrosion steel material 2 to which the present invention is applied does not need to increase the leg length W of the welded part 8, can suppress an increase in welding amount, and can only reduce the welding cost. In addition, an increase in welding heat supplied from the welded portion 8 to the surface 41 of the steel pipe sheet pile 6 or the steel pipe pile 7 can be suppressed, and deformation of the steel pipe sheet pile 6 or the steel pipe pile 7 can be prevented.

  In the second embodiment, the anticorrosion steel material 2 to which the present invention is applied is the four corners or the middle part of the side edge 13 of the sacrificial steel plate 1, and the attachment portion 14 of the sacrificial steel plate 1 is the surface 41 of the steel pipe sheet pile 6 or the steel pipe pile 7. As a result, the sacrificial steel plate 1 is fixed to the steel pipe sheet pile 6 or the steel pipe pile 7. Thereby, the anticorrosion steel material 2 to which the present invention is applied can suppress an increase in the proportion of the welded portion 8 with respect to the side edge 13 of the sacrificial steel plate 1 and can reduce the welding cost. The increase in welding heat supplied from the welded part 8 to the surface 41 of the steel pipe sheet pile 6 or the steel pipe pile 7 can be suppressed, and the deformation of the steel pipe sheet pile 6 or the steel pipe pile 7 can be prevented.

  As mentioned above, although the example of embodiment of this invention was demonstrated in detail, all the embodiment mentioned above showed only the example of actualization in implementing this invention, and these are the technical aspects of this invention. The range should not be construed as limiting.

  For example, as shown in FIG. 34 (a), the anticorrosion steel material 2 to which the present invention is applied is formed by bending a corrosion prevention material locking member 83 such as a round bar and fixing it to the welded portion 8, and this anticorrosion material locking member. It is also possible to provide the anticorrosion material 81 on the attachment portion 14 of the sacrificial steel plate 1 so as to involve 83. Further, the anticorrosion material locking member 83 may be directly fixed to the sacrificial steel plate 1 or the anticorrosion steel material 2 by means such as welding. At this time, as shown in FIG. 34 (b), the anticorrosive steel material 2 to which the present invention is applied has the effect that the anticorrosive material 81 is reinforced by the anticorrosive material locking member 83 and the anticorrosive material 81 is prevented from peeling off and falling off. It becomes possible to raise.

1: Sacrificial steel plate 11: Inner side surface 12: Outer side surface 13: Side edge 13a: Upper side edge 13b: Lower side edge 13c: Left side edge 13d: Right side edge 14: Mounting portion 14a: Concave portion 14b: Convex portion 15 : Edge boundary 16: Bending part 2: Anticorrosive steel material 3: Standing structure 4: Steel member 4a: Lower part 4b: Upper part 41: Surface 45: Joint part 5: Steel sheet pile 52: Flange 53: Web 54: Arm part 6 : Steel pipe sheet pile 7: Steel pipe pile 8: Welded part 81: Anticorrosive material 82: Anticorrosive layer 83: Anticorrosive material locking member 90: Underwater ground 91: Underwater 92: Back buried 93: Upper concrete 94: Back construction 95: Tie rod A: front side B: back side G: gap L: predetermined range S: shear direction W: leg length X: width direction Y: axial direction

Claims (18)

A corrosion-resistant steel material provided at a boundary separating the first region on the front side and the second region on the back side ,
A steel member, and a sacrificial steel plate attached in a predetermined range in the axial direction of the steel member,
The sacrificial steel plate is attached between the inner side surface and the outer side surface at the side edge so that the outer side surface opposite to the inner side surface is larger than the inner side surface attached to the steel member. And a substantially wedge-shaped gap in a state of being acute with respect to the surface of the steel member is formed in the mounting portion, and an edge boundary with at least a part of the inner surface of the mounting portion Thus, the corrosion-resistant steel material is welded to the steel member so that the welded portion does not protrude in the left-right direction or the up-down direction from the substantially wedge-shaped gap . A steel sheet pile, a steel pipe sheet pile, or a steel pipe pile is used for the steel member. The anticorrosion steel material according to claim 1, wherein the attachment portion is formed in a tapered shape that inclines stepwise or continuously from the inner side surface to the outer side surface. The anticorrosion steel material according to any one of claims 1 to 3, wherein the attachment portion has one or both of a concave portion and a convex portion formed from the inner side surface to the outer side surface. The anticorrosion steel material according to any one of claims 1 to 4, wherein the attachment portion is provided with an anticorrosion material so as to cover at least a welded portion welded to the steel member. The anticorrosive steel material according to claim 5, wherein the anticorrosive material is provided with the anticorrosive material locking member such that the anticorrosive material locking member fixed by means such as welding is rolled up. The sacrificial steel plate has the attachment portion formed on one or both of a left edge and a right edge, and is intermittently or continuously connected to the steel member at an edge boundary with the inner surface of the attachment portion. The anticorrosion steel material according to any one of claims 1 to 6, wherein the anticorrosion steel material is welded. The sacrificial steel plate has the attachment portion formed on one or both of the upper edge and the lower edge, and is intermittent or continuous with the steel member at the edge boundary with the inner surface of the attachment portion. The anticorrosion steel material according to any one of claims 1 to 7, wherein the anticorrosion steel material is welded. The anticorrosive steel material according to any one of claims 1 to 8, wherein the sacrificial steel plate is provided with an anticorrosion layer between the steel member and the inner surface. The corrosion-resistant steel material according to claim 9, wherein the sacrificial steel plate is provided with the anti-corrosion layer along the side edge. A standing structure provided at a boundary separating the first area on the front side and the second area on the back side ;
A plurality of steel members, and a sacrificial steel plate attached to the steel members in a predetermined range in the axial direction,
The plurality of steel members are provided with a lower portion in the axial direction on the ground, and an upper portion in the axial direction is provided at a boundary between the front side and the rear side, and the sacrificial steel plate is attached to the steel member. A mounting portion is formed between the inner side surface and the outer side surface at the side edge so that the outer side surface opposite to the inner side surface is larger than the inner side surface, and is formed on the surface of the steel member. A substantially wedge-shaped gap having an acute angle with respect to the inner surface is formed in the mounting portion, and at the edge boundary with the inner surface of at least a part of the mounting portion, the left or right direction from the substantially wedge-shaped gap or A standing structure characterized by being welded to the steel member so that the welded portion does not protrude in the vertical direction . The standing structure according to claim 11, wherein the steel member is a steel sheet pile, a steel pipe sheet pile, or a steel pipe pile. At least a part of the plurality of steel members is in a state where the sacrificial steel plate is pre-welded, the lower part in the axial direction is driven on the ground, and the upper part in the axial direction is at the boundary between the front side and the back side The standing structure according to claim 11 or 12, wherein the standing structure is provided. At least some of the plurality of steel members are welded to the sacrificial steel plate in a state where the lower part in the axial direction is placed on the ground and the upper part in the axial direction is provided at the boundary between the front side and the back side. The standing structure according to claim 11 or 12, wherein: The plurality of steel members are formed with joint portions on either one or both of the left end portion and the right end portion,
The upright structure according to claim 14, wherein the sacrificial steel plate is welded to the plurality of steel members so as to straddle the joint portions of the plurality of adjacent steel members. A sacrificial steel plate attached to a steel member of a corrosion-resistant steel material provided at a boundary separating the first region on the front side and the second region on the back side ,
An attachment portion is formed between the inner surface and the outer surface at the side edge so that the outer surface opposite to the inner surface is larger than the inner surface attached to the steel member, A substantially wedge-shaped gap having an acute angle with respect to the surface of the steel member is formed in the mounting portion, and the substantially wedge-shaped gap is formed at an edge boundary with the inner surface of at least a part of the mounting portion. A sacrificial steel plate that is welded to the steel member so that the welded portion does not protrude in the left-right direction or the up-down direction from the gap . The sacrificial steel plate according to claim 16, wherein the attachment portion is formed in a tapered shape that inclines stepwise or continuously from the inner side surface to the outer side surface. The sacrificial steel sheet according to claim 16 or 17, wherein the attachment portion has one or both of a concave portion and a convex portion formed from the inner side surface to the outer side surface.

Images