JP2015175181A - Steel member having protective layer and foundation structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steel member having a protective layer and a foundation structure in which the steel member can be protected simply and reliably by a lining steel plate such that an abutment area between the steel member and the lining steel sheet is greatly secured to thereby improve the integrity between the steel member and the lining steel sheet.SOLUTION: A steel member 1 has a protective layer provided in the boundary between a front side A and a rear side B. The steel member 1 having the protective layer applying the present invention includes a steel member 2 using a steel sheet pile of a substantially hat-shaped section or a substantially U-shaped section, and a lining steel sheet 3 mounted to a predetermined range in the shaft core direction Y of the steel member 2. The lining steel sheet 3 forms a mounting surface 10 planarly mounted to the steel member 2 and fixed to the steel member 2 in the front side A for resisting corrosion, abrasion or collision force of the steel member 2.

Description

  TECHNICAL FIELD The present invention relates to a steel member having a protective layer provided at a boundary between a front side and a back side, and a foundation structure, such as a water structure such as a harbor steel structure, a retaining wall, a retaining wall, and the like. .

  Conventionally, an anticorrosion panel structure using a base material made of a steel sheet joined 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. The material, the titanium plate, and the titanium alloy plate protect the steel sheet pile from corrosion.

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-mentioned problems, and the object of the present invention is to easily attach a lining steel plate to a steel member and to reliably protect the steel member with the lining steel plate. An object of the present invention is to provide a steel member and a substructure having a protective layer that can be used.

  The steel member having a protective layer of the first invention is a steel member having a protective layer provided at the boundary between the front side and the back side, and a steel sheet pile having a substantially hat-shaped cross section or a substantially U-shaped cross section is used. A steel member and a lining steel plate attached in a predetermined range in the axial direction of the steel member, and the lining steel plate is a front side for resisting corrosion, wear or collision force of the steel member Then, an attachment surface that is attached to the steel member in a planar shape is formed and fixed to the steel member.

  The steel member having the protective layer of the second invention is characterized in that, in the first invention, the lining steel plate is a steel sheet pile obtained by cutting a joint portion of a steel sheet pile having substantially the same cross-sectional shape as the steel member. To do.

  A steel member having a protective layer according to a third aspect of the present invention is the first aspect, wherein the lining steel plate has a flange portion and a web portion having substantially the same cross-sectional shape as the steel member, or substantially the same cross-sectional shape as the steel member. A steel sheet that is hot-rolled so as to have a flange portion, a web portion, and an arm portion is used.

  A steel member having a protective layer according to a fourth aspect of the present invention is the first aspect, wherein the lining steel plate has a flange portion and a web portion having substantially the same cross-sectional shape as the steel member, or substantially the same cross-sectional shape as the steel member. A steel plate that is pressed so as to have a flange portion, a web portion, and an arm portion is used.

  A steel member having a protective layer according to a fifth aspect of the present invention is the first invention, wherein the lining steel plate has a flange portion and a web portion having substantially the same cross-sectional shape as the steel member, or substantially the same cross-sectional shape as the steel member. A plurality of flat steel plates assembled and welded so as to have a flange portion, a web portion and an arm portion are used.

  The steel member having a protective layer according to a sixth aspect of the present invention is the steel member according to any one of the first to fifth aspects, wherein the lining steel plate has an outer surface opposite to the inner surface than an inner surface attached to the steel member. A side end surface is formed between the inner side surface and the outer side surface so that is larger, and welded to the steel member at at least a part of a boundary portion between the side end surface and the inner side surface. It is characterized by being.

  A steel member having a protective layer according to a seventh invention is characterized in that, in the sixth invention, the side end face is formed in a tapered shape that slopes stepwise or continuously from the inner face to the outer face. And

  The steel member having a protective layer according to an eighth aspect of the present invention is the sixth aspect or the seventh aspect, wherein the side end surface is formed with one or both of a concave portion and a convex portion from the inner side surface to the outer side surface. It is characterized by that.

  The steel member having a protective layer according to a ninth aspect of the present invention is the steel member according to any one of the sixth to eighth aspects, wherein the side end surface covers at least a welded portion welded to the steel member, and the anticorrosive material is provided. It is provided.

  A steel member having a protective layer according to a tenth aspect of the present invention is the steel member according to the ninth aspect, wherein the side end face is provided with the anticorrosive material such that the anticorrosive material locking member fixed by means such as welding is involved. Features.

  The steel member having a protective layer according to an eleventh aspect of the invention is any one of the sixth aspect to the tenth aspect, wherein the lining steel plate has the side end face formed on one or both of the left end and the right end. The steel member is welded intermittently or continuously.

  The steel member having a protective layer according to a twelfth aspect of the invention is any one of the sixth to eleventh aspects of the invention, wherein the lining steel plate has the side end face formed on either one or both of the upper end and the lower end. The steel member is welded intermittently or continuously.

  The steel member having a protective layer according to a thirteenth aspect of the present invention is the steel member according to any one of the sixth to twelfth aspects, wherein the lining steel plate is coated with anticorrosion or coating on one or both of the inner side surface and the outer side surface. An anticorrosive layer is provided.

  The steel member having a protective layer according to a fourteenth aspect of the present invention is the steel member according to any one of the first to thirteenth aspects of the present invention, wherein the lining steel plate has a time-curable material in a gap formed by being separated from the steel member. It is filled.

  A steel member having a protective layer according to a fifteenth aspect of the present invention is the steel member according to any one of the first to fourteenth aspects, wherein the lining steel plate is formed between the steel member and the lining steel plate by corrosion, wear or collision force. An identification sheet for visually recognizing the formed hole is provided.

  A steel member having a protective layer according to a sixteenth aspect of the present invention is the steel member according to the fifteenth aspect, wherein the identification sheet is formed of a time-curable material filled in a gap formed by separating the steel member and the lining steel plate. It is provided on either one or both of the front side and the back side.

  A foundation structure according to a seventeenth aspect of the invention is a foundation structure provided at the boundary between the front side and the back side, and a steel member using a steel sheet pile having a substantially hat-shaped cross section or a substantially U-shaped cross section, and the steel Lined steel plate attached to a predetermined range in the axial direction of the steel member, the steel member has a lower part in the axial direction standing on the ground, and the upper part in the axial direction is on the front side and the rear side The lining steel plate is formed on the front side for resisting corrosion, wear or collision force of the steel member, forming a mounting surface to be attached to the steel member in a plane shape, It is fixed to the steel member.

  According to the first invention to the sixteenth invention, the lining steel plate can be easily attached to the steel member on the front side for resisting corrosion, wear or collision force of the steel member, and the steel member can be reliably secured with the lining steel plate. It becomes possible to protect.

  In particular, according to the second invention, from the hat-shaped steel sheet pile, a pair of joint portions can be cut by cutting or the like to produce a lining steel plate having substantially the same cross-sectional shape as the steel member. Therefore, it is possible to manufacture a lining steel plate easily and at low cost only by performing a simple cutting process or the like without the need for separately manufacturing a steel sheet pile or the like.

  In particular, according to the sixth aspect of the present invention, the welded portion and the anticorrosive material are not exposed due to being recessed in the substantially wedge-shaped gap, or the amount of exposure is extremely reduced, so that the welded portion or As protection for the anticorrosive material, it is possible to prevent the lining steel plate from being detached from the steel member. Further, according to the sixth aspect of the invention, it is possible to reduce the welding cost because it is possible to suppress an increase in the welding amount without requiring an increase in the leg length of the welding location. An increase in welding heat supplied to the steel member can be suppressed, and deformation of the steel member due to welding heat can be prevented.

  In particular, according to the eighth invention, one or both of the concave portion and the convex portion are formed on the side end surface of the lining steel plate, and the adhesion between the anticorrosive material and the side end surface is improved, so that the anticorrosive material is the side end surface. Even when a drifting object or the like in the water collides with the anticorrosive material, it is possible to prevent the anticorrosive material from being detached from the side end face.

  In particular, according to the ninth invention, the anticorrosion material is provided between the lining steel plate and the steel member so that the anticorrosion material engagement member is wound around the side end surface of the lining steel plate. By integrating with the member, it becomes possible to prevent the anticorrosive material from peeling off and falling off.

  In particular, according to the fourteenth invention, a gap portion is formed between the lining steel plate and the steel member, and this gap portion is filled with the time-curable material, so that the time-curable material filled in the gap portion. Thus, corrosion and wear of the steel member can be prevented, and the bending rigidity and torsional rigidity of the steel member and the lining steel plate can be improved. Furthermore, according to the fourteenth aspect of the invention, even when a hole is opened in the lining steel plate due to corrosion or the like, the time-curable material exhibits a protective effect, so that damage to the steel member can be reduced.

  In particular, according to the seventeenth aspect, since the lining steel plate is provided by welding in advance, it is possible to easily fix the lining steel plate to the steel member without requiring welding of the side end surface of the lining steel plate in field work. It becomes possible. According to the fifteenth aspect of the present invention, when a lining steel plate is welded in a field operation in a state where a plurality of steel members are provided at the boundary between the front side and the back side, the steel material is corroded in the ocean and the harbor. It is possible to fix the lining steel plate intensively by retrofitting only to a site where intense concentrated corrosion or a movement of the bottom sediment (sand, gravel, etc.) is severe.

It is a perspective view which shows the foundation structure to which this invention is applied. It is a perspective view which shows the steel member which has a protective layer to which this invention is applied. (A) is a top view which shows the steel member of 1st Embodiment of the steel member which has a protective layer to which this invention is applied, (b) is the front view. (A) is a top view which shows the lining steel plate of 1st Embodiment of the steel member which has a protective layer to which this invention is applied, (b) is the front view. (A) is a top view which shows lining steel plates, such as a steel sheet pile, in 1st Embodiment of the steel member which has a protective layer to which this invention is applied, (b) is the front view. (A) is a top view which shows the lining steel plate of several substantially flat plate steel plate in 1st Embodiment of the steel member which has a protective layer to which this invention is applied, (b) is the front view. is there. (A) is a top view which shows the lining steel plate of the substantially flat flat steel plate and the bent flat steel plate in 1st Embodiment of the steel member which has a protective layer to which this invention is applied, (b) It is a front view. It is a side view which shows the side end surface formed in the full length or a part in the left end part and right end part of the lining steel plate of the steel member which has a protective layer to which this invention is applied. It is a side view which shows the side end surface formed in the full length or a part in the upper end part and lower end part of the lining steel plate of the steel member which has a protective layer to which this invention is applied. It is an enlarged plan view which shows the side end surface of the lining steel plate of the steel member which has a protective layer to which this invention is applied. It is an enlarged plan view which shows the recessed part and convex part which were formed in the side end surface of the lining steel plate of the steel member which has a protective layer to which this invention is applied. (A) is an enlarged plan view which shows the welding location of the steel member which has a protective layer to which this invention is applied, (b) is the enlarged front view. (A) is an enlarged plan view which shows the corrosion protection material of the steel member which has a protective layer to which this invention is applied, (b) is the enlarged front view. (A) is an enlarged plan view which shows the anticorrosion material locking member of the steel member which has a protective layer to which this invention is applied, (b) is the enlarged front view. (A) is a top view which shows the anticorrosion layer provided in the inner surface of the lining steel plate of the steel member which has a protective layer to which this invention is applied, (b) is the anticorrosion layer provided in the outer surface. FIG. It is an enlarged plan view of the joint part which shows the anticorrosion layer provided in the inner surface of the lining steel plate of the steel member which has a protective layer to which this invention is applied. It is an enlarged plan view of the joint part which shows the anticorrosion layer provided in the outer surface of the lining steel plate of the steel member which has a protective layer to which this invention is applied. It is a front view which shows the anticorrosion layer provided in the lining steel plate of the steel member which has a protective layer to which this invention is applied. It is a top view which shows the clearance gap formed in the steel member which has a protective layer to which this invention is applied, and a time-hardenable material. It is a top view which shows the clearance gap formed by interposing a rod member in the steel member which has a protective layer to which this invention is applied, and a time-hardening material. It is a top view which shows lining steel plates, such as a steel sheet pile, in 2nd Embodiment of the steel members which have a protective layer to which this invention is applied. It is a top view which shows the lining steel plate of several flat steel plates in 2nd Embodiment of the steel member which has a protective layer to which this invention is applied. It is a top view which shows the modification of lining steel plates, such as a steel sheet pile, in 2nd Embodiment of the steel member which has a protective layer to which this invention is applied. It is a top view which shows the lining steel plate of a pair of division | segmentation steel plate of the steel members which have a protective layer to which this invention is applied. It is a side view which shows the foundation structure to which this invention is applied. (A) is a side view which shows what the lining steel plate extended to the upper concrete by the foundation structure to which this invention is applied, (b) is a side view which shows a tie rod type steel sheet pile wall. It is an enlarged plan view which shows the substantially wedge-shaped gap | interval of the steel member which has a protective layer to which this invention is applied. It is an enlarged plan view which shows the anticorrosion material which improved the intensity | strength of the shear direction with the steel member which has a protective layer to which this invention is applied. (A) is an enlarged plan view which shows the state by which the identification sheet was provided with the steel member which has a protective layer to which this invention is applied, (b) is the enlarged front view. It is an enlarged plan view which shows the state by which the identification sheet | seat was provided in any one or both of the front side of a time-hardening material and a back side by the steel member which has a protective layer to which this invention is applied.

  Hereinafter, the form for implementing the steel member 1 and the foundation structure 8 which have a protective layer to which this invention is applied is demonstrated in detail, referring drawings.

  As shown in FIG. 1, the foundation structure 8 to which the present invention is applied is mainly an aquatic 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. The foundation structure 8 to which the present invention is applied is a structure in which a hat-shaped steel sheet pile 6 or a U-shaped steel sheet pile 7 or the like is placed on a water bottom ground 80 and is erected, and a plurality of hat-shaped steel sheet piles 6 or U-shaped By arranging the steel sheet piles 7, a wall structure is constructed. The plurality of hat-shaped steel sheet piles 6 or the U-shaped steel sheet piles 7 are not limited to this, and can be embedded in the water bottom ground 80 or standing on the footing concrete.

  First, a first embodiment of a steel member 1 having a protective layer to which the present invention is applied will be described. The steel member 1 having a protective layer to which the present invention is applied is provided at the boundary between the front side A and the back side B, and as shown in FIG. The steel member 2 in which the steel sheet pile of this was used, and the lining steel plate 3 attached to the predetermined range by the axial direction Y of the steel member 2 are provided.

  As shown in FIG. 3, the steel member 2 uses a hat-shaped steel sheet pile 6 having a substantially hat-shaped cross section. The steel member 2 of the hat-shaped steel sheet pile 6 includes a flange portion 61, a pair of web portions 62, a pair of arm portions 63, and a pair of joint portions 64. The pair of web portions 62 are continuously provided by being inclined from both ends of the flange portion 61 in the width direction X of the hat-shaped steel sheet pile 6. The pair of arm portions 63 are provided continuously from each of the pair of web portions 62 so as to be substantially parallel to the flange portion 61. The pair of joint portions 64 are provided continuously from one end of each of the pair of arm portions 63. When the hat-shaped steel sheet pile 6 is constructed by connecting a plurality of steel members 2 in the width direction X to construct a wall structure, the one joint portion 64 of the adjacent hat-shaped steel sheet pile 6 is connected to the other joint portion 64. Is to be fitted.

  When the lining steel plate 3 is attached to the steel member 2 of the hat-shaped steel sheet pile 6, a steel sheet pile having substantially the same cross-sectional shape as the steel member 2 is used as shown in FIGS. For example, when a hat-shaped steel sheet pile 40 having substantially the same cross-sectional shape as that of the steel member 2 is used, the pair of joint portions 44 are cut from the hat-shaped steel sheet pile 40 having substantially the same cross-sectional shape. It is cut out and includes a flange portion 41, a pair of web portions 42, and a pair of arm portions 43. In addition, the lining steel plate 3 is not limited to this, and the flange portion 41, the pair of web portions 42, and the pair of arm portions 43 so as to have substantially the same cross-sectional shape as the steel member 2 of the hat-shaped steel sheet pile 6. A steel sheet that has been hot-rolled or pressed may be used.

  The lining steel plate 3 has substantially the same cross-sectional shape as the steel member 2 of the hat-shaped steel sheet pile 6, and a flat steel plate 45 assembled and welded is used as shown in FIGS. A pair of web portions 42 and a pair of arm portions 43 may be provided. At this time, as shown in FIG. 6, the lining steel plate 3 may be assembled and welded by combining a plurality of substantially flat plate-like steel plates 45 and welding each other. As shown in FIG. Assembling and welding may be performed by combining a flat steel plate 45 and a flat steel plate 45 that has been bent or the like and welding them together. The lining steel plate 3 is attached to the steel member 2 by separating a plurality of flat steel plates 45 from each other. However, the lining steel plate 3 is not limited to this and is attached to the steel member 2 by connecting a plurality of flat steel plates 45 to each other. Also good.

  As shown in FIGS. 5, 6, and 7, the lining steel plate 3 includes an inner surface 31 attached to the steel member 2, an outer surface 32 opposite to the inner surface 31, an upper end portion 36, a lower end portion 37, A side end portion 35 including a left end portion 38 and a right end portion 39. The lining steel plate 3 is at least a part of the upper end portion 36, the lower end portion 37, the left end portion 38 and the right end portion 39 so that the outer side surface 32 is larger than the inner side surface 31 as shown in FIGS. In addition, a side end surface 33 is formed between the inner surface 31 and the outer surface 32.

  As shown in FIG. 8A, the lining steel plate 3 has a side end face 33 extending over the entire length of the side end portion 35 at one or both of the left end portion 38 and the right end portion 39. The lining steel plate 3 is not limited to this, and as shown in FIG. 8B, the side end face 33 may be formed only in part at one or both of the left end portion 38 and the right end portion 39. As shown in FIG. 9A, the lining steel plate 3 has a side end surface 33 formed over the entire length of the side end portion 35 at one or both of the upper end portion 36 and the lower end portion 37. The lining steel plate 3 is not limited to this, and as shown in FIG. 9B, the side end face 33 may be formed only in part at one or both of the upper end portion 36 and the lower end portion 37.

  As shown in FIG. 10A, the side end surface 33 is formed in a tapered shape that is continuously inclined from the inner surface 31 to the outer surface 32 of the lining steel plate 3. The side end face 33 is not limited to this, and as shown in FIG. 10B, the angle of inclination is gradually changed from the inner side surface 31 to the outer side surface 32 of the lining steel plate 3, and the taper is gradually inclined. It may be formed in a shape. Further, the side end face 33 is not limited to this, and may be formed in a tapered shape that inclines stepwise by being combined with a curved face as shown in FIG.

  As shown in FIG. 11A, the side end surface 33 is subjected to blasting or the like on the side end portion 35, thereby forming a plurality of concave portions 33 a from the inner side surface 31 to the outer side surface 32. The side end face 33 is not limited to this, and a plurality of protruding protrusions 33b may be formed from the inner side surface 31 to the outer side surface 32 as shown in FIG. Further, the side end face 33 is not limited to this, and as shown in FIG. 11C, both the concave portion 33a and the convex portion 33b may be formed.

  A steel member 1 having a protective layer to which the present invention is applied has a lining on the front side A for resisting corrosion, wear or impact force of the steel member 2 as shown in FIGS. The steel plate 3 is fixed to the steel member 2 by welding or the like. The steel member 1 having a protective layer to which the present invention is applied forms an attachment surface 10 that is attached to the steel member 2 in a planar shape, and the lining steel plate 3 is fixed to the steel member 2. The steel member 1 having a protective layer to which the present invention is applied has a side end surface 33 formed on one or both of the left end portion 38 and the right end portion 39, and one of the upper end portion 36 and the lower end portion 37. Or the side end surface 33 is formed in both.

  As shown in FIG. 12A, the steel member 1 having a protective layer to which the present invention is applied has at least a part of the boundary portion 34 between the inner side surface 31 and the side end surface 33, and the lining steel plate 3 is a steel member. 2 is welded. At this time, as shown in FIG. 12B, the lining steel plate 3 is intermittently or continuously welded in the width direction X or the axial direction Y at a part or all of the boundary portion 34 of the side end surface 33. To be fixed. At this time, the lining steel plate 3 is welded and fixed to the steel member 2 at, for example, the four corners and the intermediate portion of the side end portion 35 of the lining steel plate 3.

  As shown in FIG. 13A, the side surface 33 of the lining steel plate 3 is welded to the steel member 2 so as to cover the welded portion 11 welded to the steel member 2. An anticorrosive material 12 such as an epoxy-based putty material is provided between the steel member 2. On the side end surface 33 of the lining steel plate 3, as shown in FIG. 13B, not only the welded portion 11 welded to the steel member 2 but also the entire length of the side end portion 35 between the steel member 2. An anticorrosive material 12 may be provided over the entire area. As the epoxy type putty material, an underwater hardening putty or the like that hardens in close contact with the steel surface even in seawater or the like is used.

  As shown in FIG. 14A, the anticorrosive material locking member 14 such as a round bar fixed to the welded portion 11 is bent on the side end surface 33 of the lining steel plate 3 by means of welding or the like. The anticorrosion material 12 may be provided between the steel member 2 so as to involve the member 14. In addition, the anticorrosion material locking member 14 may be directly fixed to the steel member 2 or the lining steel plate 3 by means such as welding. As shown in FIG. 14 (b), the steel member 1 having a protective layer to which the present invention is applied has the anticorrosive material 12 integrated with the anticorrosive material locking member 14 inside, thereby peeling the anticorrosive material 12, It is possible to prevent the dropout.

  As shown in FIG. 15, the lining steel plate 3 is provided with an anticorrosion layer 15 on which one of the inner side surface 31 and the outer side surface 32 is coated, as shown in FIG. For example, the lining steel sheet 3 is provided with an anticorrosion layer 15 by infiltrating an anticorrosion solvent such as a cyanoacrylate-based instant adhesive when coated anticorrosion is applied, and when coated, the anticorrosion is applied. The anticorrosion layer 15 is provided by applying paint or the like.

  When the anticorrosion layer 15 is provided on the inner side surface 31 of the lining steel plate 3, the steel member 2 and the lining steel plate 3 are attached to the front side A of the steel member 2 as shown in FIG. An anticorrosive solvent or the like is injected from a portion not welded to the steel member 2 between the inner surface 31 and the inner surface 31. As shown in FIG. 16A, the anticorrosion layer 15 is provided so as to reach the joint portion 64 outside the fitting portion of the joint portion 64 of the steel member 2, and FIG. As shown in FIG. 3, the arm portion 63 is provided on the inner side of the fitting portion 64 of the steel member 2 before the joint portion 64.

  When the anticorrosion layer 15 is provided on the outer side surface 32, the lining steel plate 3 is attached to the front side A of the steel member 2 as shown in FIG. Covered with an anticorrosion layer 15. As shown in FIG. 17, the anticorrosion layer 15 is provided so as to cover the anticorrosion material 12 provided on the side end face 33. As shown in FIG. 17A, the anticorrosion layer 15 is provided so as to reach the joint portion 64 outside the fitting portion of the joint portion 64 of the steel member 2, and FIG. As shown in FIG. 3, the arm portion 63 is provided on the inner side of the fitting portion 64 of the steel member 2 before the joint portion 64.

  As shown in FIG. 18A, the lining steel plate 3 is provided with the anticorrosion layer 15 along the side end portion 35. The anticorrosion layer 15 is not limited to this, and may be provided over the entire surface of the lining steel plate 3 as shown in FIG.

  As shown in FIG. 19, the lining steel plate 3 forms an attachment surface 10 that is attached to the steel member 2 in a planar shape, and is fixed to the steel member 2 by welding or the like. As shown in FIG. 19A, the lining steel plate 3 is attached to the steel member 2 in a planar shape by bringing the web portion 42 of the lining steel plate 3 into contact with the web portion 62 of the steel member 2. A mounting surface 10 is formed. At this time, the lining steel plate 3 is provided with a gap between the flange portion 41 of the lining steel plate 3 and the flange portion 61 of the steel member 2, and the gap portion 16 separated from the steel member 2 in the depth direction Z. May be formed.

  As shown in FIG. 19B, the lining steel plate 3 is attached to the steel member 2 in a planar shape by bringing the flange portion 41 of the lining steel plate 3 into contact with the flange portion 61 of the steel member 2. A mounting surface 10 is formed. At this time, the lining steel plate 3 is provided with a gap between the web portion 42 of the lining steel plate 3 and the web portion 62 of the steel member 2, and the gap portion 16 separated from the steel member 2 is formed. Also good. When the anticorrosion layer 15 is provided on the inner side surface 31 of the lining steel plate 3, the attachment surface 10 attached to the steel member 2 is formed in contact with the anticorrosion layer 15 in a planar shape.

  As shown in FIG. 20, the lining steel plate 3 may have a bar member 18 such as a reinforcing bar interposed between the arm portion 43 of the lining steel plate 3 and the arm portion 63 of the steel member 2. At this time, the lining steel plate 3 is a state in which the gap member 16 is formed between the arm portion 43 of the lining steel plate 3 and the arm portion 63 of the steel member 2, and the bar member 18 such as a reinforcing bar is the arm of the lining steel plate 3. It attaches to the arm part 63 and the arm part 63 of the steel member 2 by welding or the like, and the welded part 11 is covered with the anticorrosive material 12.

  In the lining steel plate 3, the time-hardening material 17 is filled in a gap portion 16 that is formed apart from the steel member 2. The time-curable material 17 is filled over the entire length of the lining steel plate 3 or is filled only in a necessary range. The time-curable material 17 is, for example, a cement-based time-curable filler (cement milk, concrete, mortar, resin mortar, etc.), a polymer resin-based filler (epoxy resin, urethane resin, etc.), or a soil-based filler (soil). Cement, etc.) or historical fillers (asphalt, etc.) are used. Further, the time-curable material 17 may be mixed with a fiber material such as glass fiber, a steel fiber, or the like, if necessary.

  Next, a second embodiment of the steel member 1 having a protective layer 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. As shown in FIG. 21, a steel member 1 having a protective layer to which the present invention is applied includes a steel member 2 using a steel sheet pile having a substantially U-shaped cross section and a steel member 2 in the second embodiment. And a lining steel plate 3 to be attached.

  The steel member 2 uses a U-shaped steel sheet pile 7 having a substantially U-shaped cross section. The steel member 2 of the U-shaped steel sheet pile 7 includes a flange portion 71, a pair of web portions 72, and a pair of joint portions 74. The pair of web portions 72 are continuously inclined from both ends of the flange portion 71 in the width direction X of the U-shaped steel sheet pile 7, and the pair of joint portions 74 are continuous from one end of each of the pair of web portions 72. Provided. When the U-shaped steel sheet pile 7 connects a plurality of steel members 2 in the width direction X to construct a wall structure, the U-shaped steel sheet pile 7 is connected to one joint portion 74 of the adjacent U-shaped steel sheet pile 7 with the other joint portion 74. Is to be fitted.

  When the lining steel plate 3 is attached to the steel member 2 of the U-shaped steel sheet pile 7, a steel sheet pile having substantially the same cross-sectional shape as the steel member 2 is used. As the lining steel plate 3, a hot-rolled or pressed steel plate is used, and a flange portion 51 and a pair of web portions 52 are formed. The lining steel plate 3 is not limited to this, and a U-shaped steel sheet pile 50 having substantially the same cross-sectional shape as that of the steel member 2 is used. May be cut off by cutting or the like to include the flange portion 51 and the pair of web portions 52.

  As shown in FIG. 22, the lining steel plate 3 has substantially the same cross-sectional shape as the steel member 2 of the U-shaped steel sheet pile 7. The web unit 52 may be provided. At this time, as shown in FIG. 22 (a), the lining steel plate 3 may be assembled and welded by combining a plurality of substantially flat plate steel plates 55 and welding each other, as shown in FIG. 22 (b). As shown, assembly welding may be performed by combining a substantially flat flat steel plate 55 and a flat steel plate 55 that has been bent and the like and welding them together. The lining steel plate 3 is attached to the steel member 2 by separating a plurality of flat steel plates 55 from each other, but is not limited thereto, and may be attached to the steel member 2 by connecting a plurality of flat steel plates 55 to each other. .

  In the lining steel plate 3, a side end surface 33 is formed between the inner side surface 31 and the outer side surface 32 so that the outer side surface 32 is larger than the inner side surface 31. As shown in FIGS. 21A and 22A, the lining steel plate 3 is formed on the outside of the groove portion formed by the flange portion 71 and the pair of web portions 72 of the U-shaped steel sheet pile 7. It is attached to the front side A. Moreover, as shown in FIG.21 (b) and FIG.22 (b), the lining steel plate 3 is steel inside the groove part formed by the flange part 71 of a U-shaped steel sheet pile 7, and a pair of web part 72. As shown in FIG. It is attached to the front side A of the member 2.

  The lining steel plate 3 is not limited to this, and as shown in FIG. 23 (a), in the gap between the inner surface 31 of the lining steel plate 3 and the bent portion of the web portion 72 of the steel member 2 of the U-shaped steel sheet pile 7. A welding spot 11 may be provided. Moreover, as shown in FIG.23 (b), the lining steel plate 3 is the inner side surface 31 of the lining steel plate 3, and the bending location which continues to the joint part 74 from the web part 72 of the steel member 2 of the U-shaped steel sheet pile 7. The welding location 11 may be provided in the gap. This welded portion 11 is covered with the anticorrosive material 12.

  A steel member 1 having a protective layer to which the present invention is applied is a front side A for resisting corrosion, wear or collision force of the steel member 2, and the lining steel plate 3 is fixed to the steel member 2 by welding or the like. The The lining steel plate 3 forms an attachment surface 10 that is attached to the steel member 2 in a planar shape, and is fixed to the steel member 2 by welding or the like. In the second embodiment, the steel member 1 having the protective layer to which the present invention is applied can be provided with the gap 16 and the anticorrosion layer 15 as in the first embodiment. When the anticorrosion layer 15 is provided on the inner side surface 31 of the lining steel plate 3, the attachment surface 10 is formed in contact with the anticorrosion layer 15 in a planar shape.

  In the lining steel plate 3, the web surface 52 of the lining steel plate 3 and the web portion 72 of the steel member 2 are brought into contact with each other, whereby the attachment surface 10 attached to the steel member 2 in a planar shape is formed. At this time, the lining steel plate 3 is provided with a gap between the flange portion 51 of the lining steel plate 3 and the flange portion 71 of the steel member 2, and the gap portion 16 separated from the steel member 2 is formed. Also good.

  The lining steel plate 3 may have the mounting surface 10 attached to the steel member 2 in a planar shape by bringing the flange portion 51 of the lining steel plate 3 into contact with the flange portion 71 of the steel member 2. At this time, in the lining steel plate 3, a gap is provided between the web portion 52 of the lining steel plate 3 and the web portion 72 of the steel member 2, and the gap portion 16 separated from the steel member 2 is formed. It will be good. In the lining steel plate 3, the time-curable material 17 may be filled in the gap 16 formed away from the steel member 2 over the entire length of the lining steel plate 3 or only in a necessary range.

  When the anticorrosion layer 15 is provided on the inner side surface 31, the lining steel plate 3 is attached to the front side A of the steel member 2 between the steel member 2 and the inner side surface 31 of the lining steel plate 3. An anticorrosive solvent or the like is injected from a portion that is not welded to the member 2. The anticorrosion layer 15 is provided up to the web portion 72 in front of the joint portion 74 inside the fitting portion 74 of the steel member 2 and outside the fitting portion of the joint portion 74 of the steel member 2. It is provided so as to reach part 74.

  When the anticorrosion layer 15 is provided on the outer side surface 32 of the lining steel plate 3, the outer side surface 32 of the lining steel plate 3 is covered with the anticorrosion layer 15 while being attached to the front side A of the steel member 2. The anticorrosion layer 15 is provided so as to cover the anticorrosion material 12 provided on the side end face 33, and the web portion 72 in front of the joint portion 74 on the inner side of the fitting portion 74 of the steel member 2. And provided so as to reach the joint portion 74 outside the fitting portion of the joint portion 74 of the steel member 2.

  The base structure 8 to which the present invention is applied uses the steel member 1 having a protective layer to which one or both of the first and second embodiments are applied.

  The foundation structure 8 to which the present invention is applied is provided at the boundary between the front side A and the back side B. As shown in FIG. 25, a hat-shaped steel sheet pile 6 or a U-shaped steel sheet pile 7 is used. The steel member 2 and the lining steel plate 3 attached in a predetermined range in the axial direction Y of the steel member 2 are provided. The steel member 2 has a lower part 2a in the axial direction Y placed in the water bottom ground 80 or embedded and standing on the ground, and an upper part 2b in the axial direction Y has front side A and rear side B. It is provided at the boundary.

  The foundation structure 8 to which the present invention is applied has the steel member 2 at the boundary between the front side A and the back side B with the lining steel plate 3 pre-welded to at least a part of the plurality of steel members 2. Provided. The foundation structure 8 to which the present invention is applied is not limited thereto, and at least a part of the plurality of steel members 2 in a state where the plurality of steel members 2 are provided at the boundary between the front side A and the back side B. In addition, the lining steel plate 3 may be welded on site.

  In the foundation structure 8 to which the present invention is applied, the lining steel plate 3 is welded and fixed to a predetermined range L in the axial direction Y of the steel member 2. This predetermined range L is determined by the structural design (calculation) and the installation environment (deterioration environment, corrosive environment, sand drift / sand flow environment, drift material environment, etc.). The range to be covered and the range effective to suppress the displacement of the steel member 2 are 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 water bottom ground 80, for example, when scouring due to the influence of waves and river flows is considered.

  In the substructure 8 to which the present invention is applied, the lining steel plate 3 is welded and fixed to the front side A of the steel member 2 at the seawater surface 81. As shown in FIG. 26 (a), the foundation structure 8 to which the present invention is applied has a self-standing steel sheet pile wall in which the upper end in the axial direction Y of the lining steel plate 3 is embedded in the upper concrete 82 and the lining steel plate 3 The lower end of the bottom may be embedded in the water bottom ground 80. At this time, in the foundation structure 8 to which the present invention is applied, the lining steel plate 3 is continuously attached to the front side A of the steel member 2 from the bottom ground 80 to the seawater surface 81 and the upper concrete 82. As shown in FIG. 26 (b), the foundation structure 8 to which the present invention is applied has the tie rod 84 and the upper portion 2b of the steel member 2 connected by a tie rod 84 to construct a tie rod type steel sheet pile wall. May be.

  The lining steel plate 3 is a clad steel plate in which a corrosion-resistant and wear-resistant metal such as titanium or stainless steel is used on the front side A, or a plated steel plate in which the front side A of the steel plate is hot-plated or electroplated. It may be used to improve the corrosion resistance and wear resistance of the lining steel plate 3. The lining steel plate 3 is subjected to means such as anti-corrosion as a countermeasure against corrosion due to contact with different metals at the interface between the steel plate and titanium, stainless steel, etc. or between the steel plate and hot dipping, electroplating, etc. It becomes possible to prevent corrosion of the lining steel plate 3 due to the above.

  As shown in FIGS. 6, 7, 22, and 24, the lining steel plate 3 includes a pair of flat steel plates 45 (55) having a predetermined steel plate thickness and a pair separated at a substantially central portion of the steel member 2. The divided steel plates 46 (56) and the like can be used properly as needed. As a result, the lining steel plate 3 can be adjusted to the thickness of the lining steel plate 3 as required in the intensive corrosion site where the steel material is severely corroded in the ocean or at the harbor, or in the site where the bottom sediment (sand, gravel, etc.) is drastically moved. Thus, the corrosion resistance of the steel member 2 can be arbitrarily improved.

  Since the lining steel plate 3 can fix the lining steel plate 3 to the steel member 2 without using an organic material or the like, when a large drifting object collides with the waves at the ocean or at the port, the bottom sediment ( Even when sand, gravel, etc.) collide, it is possible to reliably protect the steel member 2 with the lining steel plate 3 by preventing the lining steel plate 3 from being broken and damaged.

  As shown in FIG. 25, the foundation structure 8 to which the present invention is applied is preliminarily welded and provided with the lining steel plate 3, so that it is not necessary to weld the side end face 33 of the lining steel plate 3 in the field work. The steel plate 3 can be easily fixed to the steel member 2. The foundation structure 8 to which the present invention is applied is a state where a plurality of steel members 2 are provided at the boundary between the front side A and the back side B, and when the lining steel plate 3 is welded on site, It is possible to fix the lining steel plate 3 intensively by retrofitting only in a concentrated corrosion site where the steel material is severely corroded in a harbor or a site where the bottom sediment (sand, gravel, etc.) is severely moved.

  As shown in FIG. 4, a steel member 1 having a protective layer to which the present invention is applied is obtained by cutting a pair of joint portions 44 from a hat-shaped steel sheet pile 40 of a lining steel plate 3 by cutting or the like. A lining steel plate 3 having substantially the same cross-sectional shape as 2 can be produced. As a result, the steel member 1 having a protective layer to which the present invention is applied does not need to separately manufacture a steel sheet pile for the lining steel plate 3, and can be easily and simply performed by a simple cutting process or the like. The lining steel plate 3 can be manufactured at low cost.

  In the steel member 1 having a protective layer to which the present invention is applied, a gap portion 16 is formed between the lining steel plate 3 and the steel member 2 as shown in FIG. Material 17 is filled. Thereby, the steel member 1 having the protective layer to which the present invention is applied can prevent the steel member 2 from being corroded or worn by the time-curable material 17 filled in the gap portion 16. It becomes possible to improve the bending rigidity and torsional rigidity of the steel member 2 and the lining steel plate 3. Furthermore, the steel member 1 having a protective layer to which the present invention is applied has a protective effect even when the lining steel plate 3 is perforated due to corrosion or the like. Damage can be reduced.

  A steel member 1 having a protective layer to which the present invention is applied has a front side A for resisting corrosion, abrasion or impact force of the steel member 2 as shown in FIGS. 5 to 7 and 19 to 24. Thus, the attachment surface 10 is formed, and the lining steel plate 3 is attached to the steel member 2 in a planar shape. Thereby, since the steel member 1 having a protective layer to which the present invention is applied can secure a large contact area between the steel member 2 and the lining steel plate 3 at the mounting surface 10, the lining steel plate 3 is cracked. Even if it is damaged, the steel member 2 can be reliably protected by the lining steel plate 3 while preventing the lining steel plate 3 from falling off the steel member 2.

  As shown in FIG. 27, the steel member 1 having a protective layer to which the present invention is applied has a side end face 33 on the lining steel plate 3 such that the outer side surface 32 is larger than the inner side surface 31 of the lining steel plate 3. Therefore, the substantially wedge-shaped gap G is formed in a state where the side end surface 33 of the lining steel plate 3 is at an acute angle with respect to the steel member 2. At this time, the steel member 1 having the protective layer to which the present invention is applied is not exposed at the side end face 33 of the lining steel plate 3 because the welded portion 11 is recessed in the substantially wedge-shaped gap G. Thus, the welded portion 11 can be protected by the outer side surface 32 of the lining steel plate 3.

  Since the steel member 1 having a protective layer to which the present invention is applied can protect the welded portion 11 with the outer surface 32 of the lining steel plate 3 as shown in FIG. It is possible to prevent the drifting material or the like from colliding and rubbing, and to prevent the lining steel plate 3 from being detached from the steel member 2.

  In the steel member 1 having a protective layer to which the present invention is applied, the anticorrosive material 12 provided so as to cover the welded portion 11 is also recessed in the substantially wedge-shaped gap G on the side end surface 33 of the lining steel plate 3. Thus, the anticorrosion material 12 is protected by the outer side surface 32 of the lining steel plate 3 because it is not exposed or the exposure amount is extremely reduced. At this time, the steel member 1 having the protective layer to which the present invention is applied can prevent the anti-corrosion material 12 from colliding with the anti-corrosion material 12 and rubbing, thereby preventing the corrosion-proof material 12 from being worn out and separated. Thus, the welded portion 11 is protected by the anticorrosive material 12, and the detachment of the lining steel plate 3 from the steel member 2 can be prevented.

  The steel member 1 having a protective layer to which the present invention is applied is a case where the thickness of the lining steel plate 3 is increased according to the corrosion progress rate of the lining steel plate 3 as shown in FIG. In addition, since the welded portion 11 is provided in a substantially wedge-shaped gap G on the side end surface 33 of the lining steel plate 3 and the welded portion 11 is protected by the anticorrosive material 12, the leg length W of the welded portion 11 is increased. There is no need to make it bigger. As a result, the steel member 1 having a protective layer to which the present invention is applied does not require an increase in the leg length W of the welded portion 11 and can suppress an increase in welding amount, thereby reducing welding costs. It becomes possible not only to make it possible, but also to suppress an increase in welding heat supplied from the welding location 11 to the steel member 2 and prevent deformation of the steel member 2 due to welding heat.

  In the steel member 1 having a protective layer to which the present invention is applied, the side end surface 33 of the lining steel plate 3 is intermittently welded to the steel member 2 at the four corners and the middle portion of the side end portion 35 of the lining steel plate 3. Thus, an increase in the proportion of the welded portion 11 to the side end portion 35 of the lining steel plate 3 can be suppressed, and not only the welding cost can be reduced, but also the steel member 2 is changed from the welded portion 11. It is possible to prevent the steel member 2 from being deformed by the welding heat by suppressing an increase in the supplied welding heat.

  As shown in FIG. 28, the steel member 1 having a protective layer to which the present invention is applied has a plurality of concave portions 33a and convex portions on the side end surface 33 of the lining steel plate 3 from the inner side surface 31 to the outer side surface 32 of the lining steel plate 3. By forming either one or both of 33b, the strength in the shear direction S of the anticorrosive material 12 provided so as to cover the welded portion 11 is improved. Thereby, the steel member 1 having the protective layer to which the present invention is applied has the anticorrosive material 12 firmly fixed to the side end surface 33 by improving the adhesion between the anticorrosive material 12 and the side end surface 33. Even when a drifting object or the like in the water collides with the anticorrosive material 12, it is possible to prevent the anticorrosive material 12 from being detached from the side end face 33.

  As shown in FIG. 29, the lining steel plate 3 has an identification sheet 19 for visually recognizing the hole 3 a formed in the lining steel plate 3 by corrosion, wear, or collision force between the steel member 2 and the lining steel plate 3. May be provided. At this time, as shown in FIG. 30, the lining steel plate 3 is either one of the front side A and the back side B of the time-hardening material 17 filled in the gap 16 formed to be separated from the steel member 2. Or the identification sheet 19 can also be provided in both. As the identification sheet 19, a polyethylene sheet having a color different from that of the lining steel plate 3 and having a conspicuous color such as yellow or red is used. Thereby, the steel member 1 having the protective layer to which the present invention is applied can visually recognize the identification sheet 19 before the steel member 2 when the hole 3a such as a crack is formed in the lining steel plate 3. Therefore, it is possible to discover the hole 3a at an early stage and confirm the deterioration state of the time-curable material 17 to quickly perform repair work or the like.

  The steel member 1 having a protective layer to which the present invention is applied is provided with the anticorrosion layer 15 between the steel member 2 and the inner side surface 31 of the lining steel plate 3 as shown in FIG. Even when seawater or the like enters between the steel member 2 and the inner side surface 31 of the lining steel plate 3, it is possible to prevent the progress of corrosion from the surface of the steel member 2. As a result, the steel member 1 having the protective layer to which the present invention is applied requires time to start repairing the dropped portion of the anticorrosive material 12 even when the anticorrosive material 12 is dropped due to an unexpected situation. Since the anticorrosion layer 15 can function as a safety allowance, it is possible to protect the surface of the steel member 2 from corrosion by the anticorrosion layer 15.

  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.

1: Steel member 10 having a protective layer: Mounting surface 11: Welded portion 12: Anticorrosive material 14: Anticorrosive material locking member 15: Anticorrosive layer 16: Gap 17: Temporarily curable material 18: Bar member 19: Identification sheet 2: Steel member 2a: Lower part 2b: Upper part 3: Lining steel plate 31: Inner side surface 32: Outer side surface 33: Side end surface 33a: Concave portion 33b: Convex portion 34: Boundary portion 35: Side end portion 36: Upper end portion 37: Lower end Part 38: Left end part 39: Right end part 40: Hat-shaped steel sheet pile (lining steel sheet)
41: Flange part 42: Web part 43: Arm part 44: Joint part 45: Flat steel plate 46: Split steel plate 50: U-shaped steel sheet pile (lining steel plate)
51: Flange part 52: Web part 55: Flat steel plate 56: Split steel plate 6: Hat-shaped steel sheet pile (steel member)
61: Flange part 62: Web part 63: Arm part 64: Joint part 7: U-shaped steel sheet pile (steel member)
71: Flange part 72: Web part 74: Joint part 8: Foundation structure 80: Submarine ground 81: Sea surface 82: Upper concrete 83: Preliminary work 84: Tie rod A: Front side B: Back side X: Width direction Y: Axial axis direction Z: Depth direction

Claims (17)

A steel member having a protective layer provided at the boundary between the front side and the back side,
A steel member in which a steel sheet pile having a substantially hat-shaped cross section or a substantially U-shaped cross section is used, and a lining steel plate attached to a predetermined range in the axial direction of the steel member,
The lining steel plate is fixed to the steel member by forming a mounting surface that is attached to the steel member in a planar shape on the front side for resisting corrosion, wear or collision force of the steel member. A steel member having a protective layer characterized by the above. The steel member having a protective layer according to claim 1, wherein a steel sheet pile obtained by cutting a joint portion of a steel sheet pile having substantially the same cross-sectional shape as the steel member is used as the lining steel plate. The lining steel plate was hot-rolled so as to have a flange portion and a web portion having substantially the same cross-sectional shape as the steel member, or a flange portion, a web portion and an arm portion having substantially the same cross-sectional shape as the steel member. A steel member having a protective layer according to claim 1, wherein a steel plate is used. The lining steel plate is a steel plate that is pressed so as to have a flange portion and a web portion having substantially the same cross-sectional shape as the steel member, or a flange portion, web portion, and arm portion having substantially the same cross-sectional shape as the steel member. The steel member having a protective layer according to claim 1, wherein: The lining steel plate is assembled and welded so as to have a flange portion and a web portion having substantially the same cross-sectional shape as the steel member, or a flange portion, a web portion and an arm portion having substantially the same cross-sectional shape as the steel member. A steel member having a protective layer according to claim 1, wherein a flat steel plate is used. In the lining steel plate, a side end surface is formed between the inner side surface and the outer side surface so that an outer side surface opposite to the inner side surface is larger than an inner side surface attached to the steel member. The steel having a protective layer according to any one of claims 1 to 5, wherein the steel member is welded to the steel member at at least a part of a boundary portion between the side end surface and the inner side surface. Made parts. The steel member having a protective layer according to claim 6, wherein the side end surface is formed in a tapered shape that inclines stepwise or continuously from the inner surface to the outer surface. The steel member having a protective layer according to claim 6 or 7, wherein the side end surface is formed with one or both of a concave portion and a convex portion from the inner side surface to the outer side surface. The steel having a protective layer according to any one of claims 6 to 8, wherein the side end surface is provided with an anticorrosive material so as to cover at least a welded portion welded to the steel member. Made parts. The steel member having a protective layer according to claim 9, wherein the anticorrosive material is provided on the side end surface so as to enclose an anticorrosive material locking member fixed by means such as welding. The said lining steel plate has the said side end surface formed in any one or both of a left end part and a right end part, and is welded to the said steel member intermittently or continuously. A steel member having the protective layer according to any one of the above. The said lining steel plate has the said side end surface formed in any one or both of an upper end part and a lower end part, and is welded to the said steel member intermittently or continuously. A steel member having the protective layer according to any one of the above. The said lining steel plate is provided with the anti-corrosion layer by which coating | coated anti-corrosion or the coating was given to any one or both of the said inner surface and the said outer surface. The one of Claims 6-12 characterized by the above-mentioned. Steel member with a protective layer. The lining steel plate has a protective layer according to any one of claims 1 to 13, wherein a gap portion formed apart from the steel member is filled with a time-curable material. Steel member. The identification sheet for visually recognizing the hole formed in the said lining steel plate by corrosion, abrasion, or a collision force between the said steel member and the said lining steel plate is provided. A steel member having the protective layer according to any one of claims. The identification sheet is provided on one or both of the front side and the back side of a time-curable material filled in a gap formed by separating the steel member and the lining steel plate. A steel member having the protective layer according to claim 15. A foundation structure provided at the boundary between the front side and the back side,
A steel member in which a steel sheet pile having a substantially hat-shaped cross section or a substantially U-shaped cross section is used, and a lining steel plate attached to a predetermined range in the axial direction of the steel member,
The steel member has a lower portion in the axial direction standing on the ground, and an upper portion in the axial direction is provided at the boundary between the front side and the back side,
The lining steel plate is fixed to the steel member by forming a mounting surface that is attached to the steel member in a planar shape on the front side for resisting corrosion, wear or collision force of the steel member. A basic structure characterized by

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