JP6470511B2 - Corrosion protection method for steel columns with coating layer and existing steel columns - Google Patents

Corrosion protection method for steel columns with coating layer and existing steel columns Download PDF

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JP6470511B2
JP6470511B2 JP2014129769A JP2014129769A JP6470511B2 JP 6470511 B2 JP6470511 B2 JP 6470511B2 JP 2014129769 A JP2014129769 A JP 2014129769A JP 2014129769 A JP2014129769 A JP 2014129769A JP 6470511 B2 JP6470511 B2 JP 6470511B2
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JP2016008433A (en
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義行 川瀬
義行 川瀬
伊澤　寛之
寛之 伊澤
沙紀 森本
沙紀 森本
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日鉄住金防蝕株式会社
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本発明は被覆層付き鋼製柱および既設鋼製柱の防食施工方法に関する。   The present invention relates to a steel column with a coating layer and a corrosion prevention method for existing steel columns.

照明柱、標識柱、および電柱等のような、屋外で土中やコンクリート中等に埋設された鋼製柱では、その埋設されている地表の地際部において腐食が生じる場合がある。このような鋼製柱の地際部における防食技術として、従来から、例えば特許文献１に記載のものが提案されている。   Steel pillars such as lighting poles, sign poles, and power poles that are buried outdoors in soil or concrete may corrode at the underground part of the buried surface. Conventionally, for example, a technique described in Patent Document 1 has been proposed as an anticorrosion technique at the ground part of such a steel column.

例えば、特許文献１には、防食被覆を有する鋼製柱であって、該鋼製柱と埋設用充填材が接する界面上端部の大気側及び充填材側の少なくとも５０ｍｍの鋼製柱外側部分に、アンモニウムイオンを含む水溶液に対する耐久性に優れた耐食材からなる被覆層を有することを特徴とする埋設地際部の腐食防御性を有する鋼製柱が記載されている。   For example, Patent Document 1 discloses a steel column having an anti-corrosion coating, on the air side at the upper end of the interface where the steel column and the filling material for contact are in contact, and at least 50 mm of the steel column outside portion on the filler side. In addition, a steel column having a corrosion protection property at a buried underground portion is described, which has a coating layer made of a corrosion-resistant material excellent in durability against an aqueous solution containing ammonium ions.

特開２００６−１３２１２８号公報JP 2006-132128 A

しかしながら、特許文献１に記載の鋼製柱では、その地際部における防食能が十分でない。そこで、本発明は、地際部において防食性に優れる被覆層付き鋼製柱を提供することを目的とする。また、既設鋼製柱における地際部を高度に防食施工することができる防食施工方法を提供することを目的とする。   However, the steel pillar described in Patent Document 1 does not have sufficient anticorrosive ability at the border. Then, an object of this invention is to provide the steel pillar with a coating layer which is excellent in corrosion resistance in a subterranean part. Moreover, it aims at providing the anti-corrosion construction method which can carry out the anti-corrosion construction to the ground part in the existing steel pillar highly.

本発明者は鋭意検討し、上記課題を解決する方法を見出して本発明を完成させた。
本発明は次の（１）〜（４）である。
（１）地際部に防食加工が施された被覆層付き鋼製柱であって、鋼製柱の地際部の主面に防食層、接着層および耐食性金属層をこの順に有し、さらに前記耐食性金属層の上下両端面の各々を覆う２つの端部シールを有し、前記防食層の主面の表面粗度（Ｒａ）は１０μｍ以下であり、前記端部シールは前記鋼製柱とは付着せずに、前記防食層の主面および前記耐食性金属層の主面に付着していて、その付着部分は、前記鋼製柱の長手方向において、各々３０ｍｍ以上である、被覆層付き鋼製柱。
（２）前記防食層は前記地際部に付着していて、その付着部分は前記鋼製柱の長手方向において５００ｍｍ以上であり、前記耐食性金属層は前記接着層を介して前記防食層と付着していて、その付着部分のうち地表部は、前記鋼製柱の長手方向において５０ｍｍ以上であり、その付着部分における前記地表部以外の部分である埋設部は、前記鋼製柱の長手方向において１００ｍｍ以上である、上記（１）に記載の被覆層付き鋼製柱。
（３）地際部に被覆層を形成して防食する既設鋼製柱の防食施工方法であって、前記地際部の表面に、主面の表面粗度（Ｒａ）が１０μｍ以下である防食層を形成し、さらにその表面に接着層を介して耐食性金属層を形成する被覆工程と、前記耐食性金属層の上下両端面の各々を覆う２つの端部シールを、前記既設鋼製柱とは付着せずに、前記防食層の主面および前記耐食性金属層の主面に付着し、その付着部分が、前記既設鋼製柱の長手方向において各々３０ｍｍ以上となるように付着する端部シール工程と、を備える既設鋼製柱の防食施工方法。
（４）前記防食層は前記地際部に付着していて、その付着部分は前記既設鋼製柱の長手方向において５００ｍｍ以上であり、前記耐食性金属層は前記接着層を介して前記防食層と付着していて、その付着部分のうち地表部は、前記既設鋼製柱の長手方向において５０ｍｍ以上であり、その付着部分における前記地表部以外の部分である埋設部は、前記既設鋼製柱の長手方向において１００ｍｍ以上である、上記（３）に記載の既設鋼製柱の防食施工方法。 The inventor diligently studied and found a method for solving the above-mentioned problems, and completed the present invention.
The present invention includes the following (1) to (4).
(1) A steel column with a coating layer whose anticorrosion processing is applied to the ground part, and having a corrosion prevention layer, an adhesive layer and a corrosion-resistant metal layer in this order on the main surface of the ground part of the steel column, It has two end seals covering each of the upper and lower end faces of the corrosion-resistant metal layer, the surface roughness (Ra) of the main surface of the anticorrosion layer is 10 μm or less, and the end seals are made of the steel pillars Are attached to the main surface of the anticorrosion layer and the main surface of the corrosion-resistant metal layer, and the attached portions are each 30 mm or more in the longitudinal direction of the steel column. Made of pillars.
(2) The anticorrosion layer is attached to the submerged portion, and the attached portion is 500 mm or more in the longitudinal direction of the steel column, and the corrosion-resistant metal layer is attached to the anticorrosion layer via the adhesive layer. And the surface part of the adhering part is 50 mm or more in the longitudinal direction of the steel pillar, and the buried part which is a part other than the earth part in the adhering part is in the longitudinal direction of the steel pillar. The steel column with a coating layer according to (1), which is 100 mm or more.
(3) An anti-corrosion method for an existing steel column that prevents corrosion by forming a coating layer on the ground part, and the surface roughness (Ra) of the main surface is 10 μm or less on the surface of the ground part. Forming a layer and forming a corrosion-resistant metal layer on the surface of the corrosion-resistant metal layer via an adhesive layer; and two end seals covering each of the upper and lower end surfaces of the corrosion-resistant metal layer, An end seal step in which the main surface of the anticorrosion layer and the main surface of the corrosion-resistant metal layer are attached without being attached, and the attached portions are attached so as to be 30 mm or more in the longitudinal direction of the existing steel column. And an anti-corrosion construction method for existing steel columns.
(4) The anticorrosion layer is attached to the submerged portion, the adhering portion is 500 mm or more in the longitudinal direction of the existing steel column, and the corrosion-resistant metal layer is connected to the anticorrosion layer via the adhesive layer. The surface portion of the attached portion is 50 mm or more in the longitudinal direction of the existing steel column, and the embedded portion other than the surface portion in the attached portion is the portion of the existing steel column. The anticorrosion construction method for an existing steel column according to (3), which is 100 mm or more in the longitudinal direction.

本発明によれば、本発明は、地際部において防食性に優れる被覆層付き鋼製柱を提供することができる。また、既設鋼製柱における地際部を高度に防食施工することができる防食施工方法を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, this invention can provide the steel pillar with a coating layer which is excellent in corrosion resistance in a subterranean part. Moreover, the anticorrosion construction method which can carry out highly anticorrosion construction of the underground part in the existing steel pillar can be provided.

図１は、本発明の被覆層付き鋼製柱の好適態様を説明するための概略断面図である。FIG. 1 is a schematic cross-sectional view for explaining a preferred embodiment of a steel column with a covering layer according to the present invention.

本発明について説明する。
本発明は、地際部に防食加工が施された被覆層付き鋼製柱であって、鋼製柱の地際部の主面に防食層、接着層および耐食性金属層をこの順に有し、さらに前記耐食性金属層の上下両端面の各々を覆う２つの端部シールを有し、前記防食層の主面の表面粗度（Ｒａ）は１０μｍ以下であり、前記端部シールは前記鋼製柱とは付着せずに、前記防食層の主面および前記耐食性金属層の主面に付着していて、その付着部分は、前記鋼製柱の長手方向において、各々３０ｍｍ以上である、被覆層付き鋼製柱である。
このような鋼製柱を、以下では「本発明の被覆層付き鋼製柱」ともいう。 The present invention will be described.
The present invention is a steel column with a coating layer subjected to anticorrosion processing on the ground part, and has a corrosion prevention layer, an adhesive layer and a corrosion-resistant metal layer in this order on the main surface of the ground part of the steel column, Furthermore, it has two end seals covering each of the upper and lower end faces of the corrosion-resistant metal layer, the surface roughness (Ra) of the main surface of the anticorrosion layer is 10 μm or less, and the end seal is made of the steel column With a coating layer, which adheres to the main surface of the anticorrosion layer and the main surface of the corrosion-resistant metal layer, and each adhering portion is 30 mm or more in the longitudinal direction of the steel column. It is a steel pillar.
Hereinafter, such a steel column is also referred to as “a steel column with a coating layer according to the present invention”.

また、本発明は、地際部に被覆層を形成して防食する既設鋼製柱の防食施工方法であって、前記地際部の表面に、主面の表面粗度（Ｒａ）が１０μｍ以下である防食層を形成し、さらにその表面に接着層を介して耐食性金属層を形成する被覆工程と、前記耐食性金属層の上下両端面の各々を覆う２つの端部シールを、前記既設鋼製柱とは付着せずに、前記防食層の主面および前記耐食性金属層の主面に付着し、その付着部分が、前記既設鋼製柱の長手方向において各々３０ｍｍ以上となるように付着する端部シール工程と、を備える既設鋼製柱の防食施工方法である。
このような防食施工方法を、以下では「本発明の方法」ともいう。 Further, the present invention is a method for preventing corrosion of an existing steel column that forms a coating layer on the ground part to prevent corrosion, and the surface roughness (Ra) of the main surface is 10 μm or less on the surface of the ground part. A coating step of forming a corrosion-resistant layer and further forming a corrosion-resistant metal layer on its surface via an adhesive layer, and two end seals covering each of the upper and lower end surfaces of the corrosion-resistant metal layer are made of the existing steel The end which adheres to the main surface of the anticorrosion layer and the main surface of the corrosion-resistant metal layer without adhering to the column, and the adhering part is 30 mm or more in the longitudinal direction of the existing steel column. An anti-corrosion construction method for an existing steel column comprising a partial sealing step.
Such an anticorrosion construction method is hereinafter also referred to as “the method of the present invention”.

以下において、単に「本発明」と記した場合、本発明の被覆層付き鋼製柱および本発明の方法の両方を意味するものとする。   In the following, the simple description of “the present invention” means both the steel column with a coating layer of the present invention and the method of the present invention.

本発明について、図１を用いて説明する。図１は、本発明の被覆層付き鋼製柱の好適態様を説明するための概略断面図である。なお、通常、被覆層は、鋼製柱の地際部における全外周を被覆するように形成するが、図１では、その一部分のみを記している。
図１において被覆層付き鋼製柱１は、その地際部に被覆層１０を有する。この被覆層１０は、鋼製柱２０の地際部における主面に形成されていて、防食層３、接着層５、耐食性金属層７および端部シール１２ａ、１２ｂを含む。また、防食層３、接着層５および耐食性金属層７はこの順で配置されている。また、端部シール１２ａ、１２ｂは、耐食性金属層７の上下両端面７１、７２の各々を覆う。さらに、図１の被覆層１０は、地表部と埋設部とに分けられる。ここで、地表部とは、土またはコンクリート等の地表１４を境とした地上側の部分を指し、埋設部とは、地表１４を境とした地下側の部分、すなわち土中またはコンクリート中等に埋設された部分を指す。 The present invention will be described with reference to FIG. FIG. 1 is a schematic cross-sectional view for explaining a preferred embodiment of a steel column with a covering layer according to the present invention. In general, the coating layer is formed so as to cover the entire outer periphery of the steel pillar at the bottom, but only a part of the coating layer is shown in FIG.
In FIG. 1, the steel column 1 with a covering layer has a covering layer 10 on the ground part. The covering layer 10 is formed on the main surface of the ground portion of the steel column 20 and includes the anticorrosion layer 3, the adhesive layer 5, the corrosion-resistant metal layer 7, and end seals 12a and 12b. Further, the anticorrosion layer 3, the adhesive layer 5, and the corrosion-resistant metal layer 7 are arranged in this order. The end seals 12a and 12b cover the upper and lower end surfaces 71 and 72 of the corrosion-resistant metal layer 7, respectively. Furthermore, the coating layer 10 in FIG. 1 is divided into a ground surface portion and a buried portion. Here, the surface portion refers to a portion on the ground side with the ground surface 14 as a boundary such as soil or concrete, and the buried portion refers to a portion on the underground side with the ground surface 14 as a boundary, that is, buried in the soil or concrete. Refers to the part that was made.

防食層３について説明する。
防食層３は、鋼製柱２０の地際部における主面（表面）に塗料を塗布し、塗膜を付着させることで形成することができる。防食層３の塗膜形成に用いられる塗料として、例えば、タールエポキシ樹脂塗料、ポリエステル樹脂塗料、ポリエチレン樹脂塗料、塩化ビニル系樹脂塗料等が挙げられる。本発明では、タールエポキシ樹脂塗料を用いることが好ましい。防食層３と端部シール（１２ａ、１２ｂ）との接着性がより向上し、より高い防食性が得られるからである。 The anticorrosion layer 3 will be described.
The anticorrosion layer 3 can be formed by applying a paint to the main surface (surface) of the steel pillar 20 at the ground portion and attaching the coating film. Examples of the paint used for forming the coating film of the anticorrosion layer 3 include tar epoxy resin paint, polyester resin paint, polyethylene resin paint, vinyl chloride resin paint, and the like. In the present invention, it is preferable to use a tar epoxy resin paint. This is because the adhesion between the anticorrosion layer 3 and the end seals (12a, 12b) is further improved, and higher anticorrosion properties are obtained.

鋼製柱２０の地際部に防食層３は付着しているが、その付着部分は、鋼製柱２０の長手方向において、５００ｍｍ以上であることが好ましい。すなわち、図１においてＬａで示す長さが５００ｍｍ以上であることが好ましい。また、防食層３の付着部分のうち地表部は、鋼製柱２０の長手方向において（すなわち図１においてＬａ1で示す長さが）、５０〜４５０ｍｍであることが好ましく、８０〜４００ｍｍであることがより好ましく、８０〜３５０ｍｍであることがより好ましく、８０〜３００ｍｍであることがさらに好ましい。さらに、防食層３の付着部分のうち埋設部は、鋼製柱２０の長手方向において（すなわち図１においてＬａ2で示す長さが）、１５０〜４７０ｍｍであることが好ましく、１５０〜４５０ｍｍであることがより好ましく、１５０〜４２０ｍｍであることがより好ましく、１５０〜３００ｍｍであることがさらに好ましい。防食層３の各部分の長さがこのような範囲となるように、上記で挙げた塗料を、鋼製柱２０の地際部における主面（表面）に塗布することが好ましい。 Although the anticorrosion layer 3 adheres to the ground portion of the steel column 20, the adhesion portion is preferably 500 mm or more in the longitudinal direction of the steel column 20. That is, the length indicated by La in FIG. 1 is preferably 500 mm or more. Further, the surface portion of the attachment portion of the anti-corrosion layer 3, in the longitudinal direction of the steel post 20 (i.e. the length indicated by La 1 in FIG. 1) is preferably 50 to 450 mm, is 80~400mm It is more preferable, it is more preferable that it is 80-350 mm, and it is further more preferable that it is 80-300 mm. Further, the embedded portion of the adhesion portion of the anticorrosive layer 3 is preferably 150 to 470 mm, and more preferably 150 to 450 mm, in the longitudinal direction of the steel column 20 (that is, the length indicated by La 2 in FIG. 1). Is more preferable, it is more preferable that it is 150-420 mm, and it is further more preferable that it is 150-300 mm. It is preferable to apply the above-described coating material to the main surface (surface) of the underground portion of the steel column 20 so that the length of each part of the anticorrosion layer 3 falls within such a range.

防食層３の主面の表面粗度（Ｒａ）は１０μｍ以下である。防食層３の主面がこのような表面粗度（Ｒａ）であると、防食層３と端部シール（１２ａ、１２ｂ）との接着性が向上するため、高い防食性を得ることができる。また、防食層３の主面の表面粗度（Ｒａ）は７μｍ以下であることが好ましく、５μｍ以下であることがより好ましく、２μｍ以下であることがさらに好ましい。
なお、上記の表面粗度（Ｒａ）は、ＪＩＳ Ｂ ０６０１：２０１３（触針式表面粗さ測定機を使用）に規定される中心線平均粗さの値を意味する。 The surface roughness (Ra) of the main surface of the anticorrosion layer 3 is 10 μm or less. When the main surface of the anticorrosion layer 3 has such a surface roughness (Ra), the adhesion between the anticorrosion layer 3 and the end seals (12a, 12b) is improved, so that high anticorrosion properties can be obtained. The surface roughness (Ra) of the main surface of the anticorrosion layer 3 is preferably 7 μm or less, more preferably 5 μm or less, and even more preferably 2 μm or less.
In addition, said surface roughness (Ra) means the value of centerline average roughness prescribed | regulated to JISB0601: 2013 (uses a stylus type surface roughness measuring machine).

接着層５について説明する。
接着層５は、防食層３と耐食性金属層７とを強固に接着させるものである。このような接着層５の形成に、例えば、ブチルゴム系粘着剤、エポキシ樹脂系接着剤、ウレタン樹脂系接着剤、アクリル樹脂系粘着剤等を用いることができる。また、このような粘着剤により形成された粘着面を有するブチルゴム基材または発泡ポリエチレン基材の両面粘着シール材等を用いることもできる。
本発明の方法では、アクリル樹脂系粘着剤により形成された粘着面を有するブチルゴム基材の両面粘着シール材を用いることが好ましい。より優れた作業性を得ることができるからである。 The adhesive layer 5 will be described.
The adhesive layer 5 is for firmly bonding the anticorrosion layer 3 and the corrosion-resistant metal layer 7 together. For the formation of the adhesive layer 5, for example, a butyl rubber adhesive, an epoxy resin adhesive, a urethane resin adhesive, an acrylic resin adhesive, or the like can be used. Moreover, a double-sided pressure-sensitive adhesive sealing material such as a butyl rubber base material or a foamed polyethylene base material having an adhesive surface formed of such an adhesive can also be used.
In the method of the present invention, it is preferable to use a double-sided adhesive sealing material of a butyl rubber base material having an adhesive surface formed by an acrylic resin adhesive. This is because better workability can be obtained.

接着層５は、防食層３の主面に、上記の接着剤または両面粘着シール材を付着させて形成される態様であってもよいし、耐食性金属層７の一方主面に、上記の接着剤または両面粘着シール材を予め付着させて形成される態様であってもよい。   The adhesive layer 5 may be formed by adhering the adhesive or the double-sided pressure-sensitive adhesive material to the main surface of the anticorrosion layer 3, or the adhesive layer 5 may be bonded to the main surface of the corrosion-resistant metal layer 7. The mode formed by making an agent or a double-sided adhesive sealing material adhere in advance may be sufficient.

耐食性金属層７について説明する。
耐食性金属層７は、接着層５を介して、防食層３の主面にシート状の耐食性金属を付着させることで形成することができる。この耐食性金属は、耐食性を有する金属であれば特に限定されず、例えば、チタン、チタン合金、ニッケル合金、高耐食ステンレス鋼、金、銀、白金等が挙げられる。本発明では、チタン、チタン合金、または高耐食ステンレス鋼を用いることが好ましく、チタンまたはチタン合金を用いることがより好ましい。本発明の被覆層付き鋼製柱の製造および本発明の方法における作業性がより向上するからである。 The corrosion resistant metal layer 7 will be described.
The corrosion-resistant metal layer 7 can be formed by attaching a sheet-like corrosion-resistant metal to the main surface of the anticorrosion layer 3 through the adhesive layer 5. The corrosion-resistant metal is not particularly limited as long as it is a metal having corrosion resistance, and examples thereof include titanium, titanium alloy, nickel alloy, high corrosion-resistant stainless steel, gold, silver, and platinum. In the present invention, it is preferable to use titanium, a titanium alloy, or high corrosion resistance stainless steel, and more preferably titanium or a titanium alloy. This is because the workability in the production of the steel column with a covering layer of the present invention and the method of the present invention is further improved.

耐食性金属層７は接着層５を介して防食層３の主面に付着しているが、鋼製柱２０の長手方向におけるその付着部分の全長（すなわち図１においてＬｂで示す長さ）は、１５０ｍｍ以上であることが好ましく、２５０ｍｍ以上であることがより好ましく、３５０ｍｍ以上であることがさらに好ましい。また、耐食性金属層７の付着部分のうち地表部は、鋼製柱２０の長手方向において（すなわち図１においてＬｂ1で示す長さが）、５０ｍｍ以上であることが好ましく、１００ｍｍ以上であることがより好ましい。また、耐食性金属層７の付着部分における埋設部は、鋼製柱２０の長手方向において（すなわち図１においてＬｂ2で示す長さが）、１００ｍｍ以上であることが好ましく、２００ｍｍ以上であることがより好ましく、２５０ｍｍ以上であることがさらに好ましい。斜め勾配になっている地面に鋼製柱を埋設した場合や、鋼製柱を埋設したコンクリートにひび割れが生じた場合、鋼製柱の埋設部における表面の露出をより効果的に防止することで、より高い防食性が得られるからである。 Although the corrosion-resistant metal layer 7 is attached to the main surface of the anticorrosion layer 3 through the adhesive layer 5, the total length of the attached portion in the longitudinal direction of the steel column 20 (that is, the length indicated by Lb in FIG. 1) is: It is preferably 150 mm or more, more preferably 250 mm or more, and further preferably 350 mm or more. Moreover, it is preferable that a ground surface part among the adhesion parts of the corrosion-resistant metal layer 7 is 50 mm or more in the longitudinal direction of the steel column 20 (that is, the length indicated by Lb 1 in FIG. 1), and is 100 mm or more. Is more preferable. Further, the buried portion in the adhesion portion of the corrosion-resistant metal layer 7 is preferably 100 mm or more, and 200 mm or more in the longitudinal direction of the steel column 20 (that is, the length indicated by Lb 2 in FIG. 1). More preferably, it is 250 mm or more. When steel pillars are buried in the sloped ground or when cracks occur in concrete with steel pillars embedded, it is possible to more effectively prevent the exposure of the surface of the steel pillar buried parts. This is because higher anticorrosion properties can be obtained.

耐食性金属層７の厚さは０．３ｍｍ以下であることが好ましく、０．２ｍｍ以下であることがより好ましく、０．１ｍｍ以下であることがさらに好ましい。   The thickness of the corrosion-resistant metal layer 7 is preferably 0.3 mm or less, more preferably 0.2 mm or less, and further preferably 0.1 mm or less.

また、耐食性金属層７および接着層５の厚さの合計は、１．５ｍｍ以下であることが好ましく、１．２ｍｍ以下であることがより好ましく、１．０ｍｍ以下であることがさらに好ましい。耐食性金属層７および接着層５の厚さにより生じた段差の上に、雨水等の水がより溜まりにくいようにするためである。   Further, the total thickness of the corrosion-resistant metal layer 7 and the adhesive layer 5 is preferably 1.5 mm or less, more preferably 1.2 mm or less, and further preferably 1.0 mm or less. This is because water such as rainwater is more unlikely to accumulate on the step formed by the thickness of the corrosion-resistant metal layer 7 and the adhesive layer 5.

端部シール（１２ａ、１２ｂ）について説明する。
端部シール１２ａ、１２ｂは、耐食性金属層７の上下両端面７１、７２の各々を覆い、防食層３の主面および耐食性金属層７の主面に付着する。これにより、防食層３と接着層５との間、または接着層５と耐食性金属層７との間へ雨水等の水が浸入することを防ぐことができる。端部シール１２ａ、１２ｂは、防食層３の主面および耐食性金属層７の主面に対する付着能を有するものであれば、特に限定されない。本発明では、粘着面が自己融着型のブチルゴム系粘着剤により形成されたポリエチレン基材の粘着シール材を用いることが好ましい。より高い防食性および耐候性が得られるからである。 The end seals (12a, 12b) will be described.
The end seals 12 a and 12 b cover the upper and lower end surfaces 71 and 72 of the corrosion-resistant metal layer 7 and adhere to the main surface of the corrosion-resistant layer 3 and the main surface of the corrosion-resistant metal layer 7. Thereby, it is possible to prevent water such as rainwater from entering between the anticorrosion layer 3 and the adhesive layer 5 or between the adhesive layer 5 and the corrosion-resistant metal layer 7. The end seals 12 a and 12 b are not particularly limited as long as they have adhesion ability to the main surface of the anticorrosion layer 3 and the main surface of the corrosion-resistant metal layer 7. In the present invention, it is preferable to use a polyethylene-based adhesive sealing material whose adhesive surface is formed of a self-bonding butyl rubber adhesive. This is because higher corrosion resistance and weather resistance can be obtained.

端部シール１２ａ、１２ｂは、耐食性金属層７の上下両端面７１、７２の各々を覆い、さらに防食層３の主面および耐食性金属層７の主面に延びている。防食層３の主面における端部シール１２ａ、１２ｂの各々の付着部分は、鋼製柱２０の長手方向において（すなわち図１においてＬｃ1、Ｌｃ4で示す各々の長さが）、３０ｍｍ以上であり、５０ｍｍ以上であることが好ましい。また、７０ｍｍ以下であることが好ましい。また、耐食性金属層７の主面における端部シール１２ａ、１２ｂの各々の付着部分は、鋼製柱２０の長手方向において（すなわち図１においてＬｃ2、Ｌｃ3で示す各々の長さが）、３０ｍｍ以上であり、５０ｍｍ以上であることが好ましい。また、７０ｍｍ以下であることが好ましい。端部シール１２ａ、１２ｂの付着部分は、防食層３の主面を越えて、鋼製柱２０の主面に至らない。 The end seals 12 a and 12 b cover the upper and lower end surfaces 71 and 72 of the corrosion-resistant metal layer 7, and further extend to the main surface of the corrosion-resistant layer 3 and the main surface of the corrosion-resistant metal layer 7. The adhesion portions of the end seals 12a and 12b on the main surface of the anticorrosion layer 3 are 30 mm or more in the longitudinal direction of the steel column 20 (that is, the lengths indicated by Lc 1 and Lc 4 in FIG. 1). Yes, it is preferably 50 mm or more. Moreover, it is preferable that it is 70 mm or less. Further, the attached portions of the end seals 12a and 12b on the main surface of the corrosion-resistant metal layer 7 are in the longitudinal direction of the steel column 20 (that is, the lengths indicated by Lc 2 and Lc 3 in FIG. 1), It is 30 mm or more, and preferably 50 mm or more. Moreover, it is preferable that it is 70 mm or less. Adhered portions of the end seals 12 a and 12 b do not reach the main surface of the steel column 20 beyond the main surface of the anticorrosion layer 3.

鋼製柱２０について説明する。
鋼製柱２０は、鋼製のものであれば特に限定されない。鋼製柱２０として、例えば、普通鋼、ステンレス鋼、合金鋼等が挙げられる。また、鋼製柱２０は、表面処理したものであってもよい。例えば、鋼製柱２０の表面に亜鉛メッキの皮膜を形成したもの等が挙げられる。 The steel pillar 20 will be described.
The steel pillar 20 is not particularly limited as long as it is made of steel. Examples of the steel column 20 include ordinary steel, stainless steel, and alloy steel. Further, the steel column 20 may be surface-treated. For example, what formed the surface of the steel pillar 20 on the surface of the zinc plating is mentioned.

鋼製柱２０の形状は特に限定されない。例えば、角形鋼管、山形鋼、Ｈ形鋼、溝形鋼、鋼管の径を順に変化させたテーパーポール鋼管等が挙げられる。   The shape of the steel column 20 is not particularly limited. For example, a rectangular steel pipe, an angle steel, an H-shaped steel, a grooved steel, and a tapered pole steel pipe in which the diameter of the steel pipe is changed in order.

鋼製柱２０は、土、コンクリート、アスファルト等に埋設して用いるものであれば、その用途は特に限定されない。例えば、電柱、照明柱、標識柱、カーブミラー支柱、階段手摺り支柱、無線アンテナ柱、鉄塔、基礎工事における支柱等が挙げられる。
本発明の被覆層付き鋼製柱は、このような鋼製柱を新設する際に用いることができる。 The use of the steel pillar 20 is not particularly limited as long as it is embedded in soil, concrete, asphalt or the like. For example, a power pole, an illumination pole, a sign pole, a curved mirror post, a stair railing post, a radio antenna post, a steel tower, a post in foundation work, and the like.
The steel column with a covering layer of the present invention can be used when newly installing such a steel column.

次に、本発明の方法について説明する。
本発明の方法における既設鋼製柱は、図１を用いて説明した鋼製柱２０であって、既に土中やコンクリート中等に埋設されたものを指す。本発明の方法では、既設鋼製柱周辺の土またはコンクリートを掘削し、既設鋼製柱の地際部を露出させて、防食施工を行う。 Next, the method of the present invention will be described.
The existing steel column in the method of the present invention refers to the steel column 20 described with reference to FIG. 1 and already embedded in the soil or concrete. In the method of the present invention, soil or concrete around an existing steel column is excavated, and the ground portion of the existing steel column is exposed to perform anticorrosion construction.

本発明の方法が備える被覆工程は、既設鋼製柱の地際部の表面に、主面の表面粗度（Ｒａ）が１０μｍ以下である防食層を形成し、さらにその表面に接着層を介して耐食性金属層を形成する工程である。この被覆工程は、図１を用いて説明した防食層３、接着層５および耐食性金属層７を、前記既設鋼製柱の地際部に形成することで行うことができる。
また、本発明の方法が備える被覆工程において、防食層３は地際部に付着していて、その付着部分は、前記既設鋼製柱の長手方向において（すなわち図１においてＬａで示す長さが）、５００ｍｍ以上であることが好ましい。また、耐食性金属層７は接着層５を介して防食層３と付着していて、その付着部分のうち地表部は前記既設鋼製柱の長手方向において（すなわち図１においてＬｂ1で示す長さが）５０ｍｍ以上であることが好ましい。さらに、耐食性金属層７の付着部分における地表部以外の部分である埋設部は前記既設鋼製柱の長手方向において（すなわち図１においてＬｂ2で示す長さが）１００ｍｍ以上であることが好ましい。 The covering step provided by the method of the present invention comprises forming an anticorrosion layer having a surface roughness (Ra) of 10 μm or less on the surface of the ground part of an existing steel column, and further interposing an adhesive layer on the surface. And forming a corrosion-resistant metal layer. This covering step can be performed by forming the anticorrosion layer 3, the adhesive layer 5 and the corrosion-resistant metal layer 7 described with reference to FIG. 1 on the ground part of the existing steel column.
Further, in the covering step provided by the method of the present invention, the anticorrosion layer 3 is attached to the ground part, and the attached part has a length indicated by La in the longitudinal direction of the existing steel column (that is, La in FIG. 1). ), Preferably 500 mm or more. Further, the corrosion-resistant metal layer 7 is attached to the anticorrosion layer 3 through the adhesive layer 5, and the ground surface portion of the attached portion is the length indicated by Lb 1 in the longitudinal direction of the existing steel column (ie, Lb 1 in FIG. 1). Is preferably 50 mm or more. Furthermore, it is preferable that the buried portion which is a portion other than the ground surface portion in the adhesion portion of the corrosion-resistant metal layer 7 is 100 mm or more in the longitudinal direction of the existing steel column (that is, the length indicated by Lb 2 in FIG. 1).

本発明の方法が備える端部シール工程は、被覆工程を行った後の前記既設鋼製柱において、耐食性金属層の上下両端面の各々を覆う２つの端部シールを、前記既設鋼製柱とは付着せずに、防食層の主面および耐食性金属層の主面に付着し、その付着部分が、前記既設鋼製柱の長手方向において各々３０ｍｍ以上となるように付着する工程である。この端部シール工程は、図１を用いて説明した端部シール１２ａ、１２ｂを、防食層３の主面および耐食性金属層７の主面に付着することで行うことができる。   The end sealing step provided by the method of the present invention is the existing steel column after the covering step, wherein two end seals covering each of the upper and lower end surfaces of the corrosion-resistant metal layer are replaced with the existing steel column. Is a step of adhering to the main surface of the anticorrosion layer and the main surface of the corrosion-resistant metal layer without adhering so that the adhering portions are 30 mm or more in the longitudinal direction of the existing steel pillar. This end sealing step can be performed by attaching the end seals 12 a and 12 b described with reference to FIG. 1 to the main surface of the anticorrosion layer 3 and the main surface of the corrosion-resistant metal layer 7.

１ 被覆層付き鋼製柱
３ 防食層
５ 接着層
７ 耐食性金属層
１０ 被覆層
１２ａ、１２ｂ 端部シール
１４ 地表
２０ 鋼製柱
７１、７２ 耐食性金属層７の端面
Ｌａ 防食層３の付着部分の長さ
Ｌａ1 防食層３の付着部分における地表部の長さ
Ｌａ2 防食層３の付着部分における埋設部の長さ
Ｌｂ 耐食性金属層７の付着部分の長さ
Ｌｂ1 耐食性金属層７の付着部分における地表部の長さ
Ｌｂ2 耐食性金属層７の付着部分における埋設部の長さ
Ｌｃ1 防食層３の主面における端部シール１２ａの付着部分の長さ
Ｌｃ2 耐食性金属層７の主面における端部シール１２ａの付着部分の長さ
Ｌｃ3 耐食性金属層７の主面における端部シール１２ｂの付着部分の長さ
Ｌｃ4 防食層３の主面における端部シール１２ｂの付着部分の長さ DESCRIPTION OF SYMBOLS 1 Steel pillar 3 with a coating layer Corrosion prevention layer 5 Adhesion layer 7 Corrosion resistance metal layer 10 Cover layer 12a, 12b End seal 14 Ground surface 20 Steel pillar 71, 72 End surface La of the corrosion resistance metal layer 7 The length of the adhesion part of the corrosion protection layer 3 in length Lb 1 corrosion attachment portion of the metal layer 7 of the length Lb attachment portion of the corrosion resistant metal layer 7 of the embedded portion of the length La 2 attachment portions of the anti-corrosion layer 3 of the surface portion of the attaching portion of the La 1 anticorrosion layer 3 The length Lb of the ground surface portion 2 The length Lc 2 of the embedded portion in the adhesion portion of the corrosion-resistant metal layer 7 The length Lc 2 of the adhesion portion of the end seal 12a in the main surface of the anti-corrosion layer 3 The edge in the main surface of the corrosion-resistant metal layer 7 the length of the length Lc 3 corrosion length Lc 4 attachment portion of the end seal 12b in the major surface of the anti-corrosion layer 3 attachment portion of the end seal 12b in the major surface of the metal layer 7 of the attachment portion of the part seals 12a

Claims (4)

地際部に防食加工が施された被覆層付き鋼製柱であって、
鋼製柱の地際部の主面に防食層、接着層および耐食性金属層をこの順に有し、さらに前記耐食性金属層の上下両端面の各々を覆う２つの端部シールを有し、前記端部シールは粘着面が自己融着型のブチルゴム系粘着剤により形成されたポリエチレン基材の粘着シール材からなり、前記端部シールの一方は地表部に、もう一方は埋設部にあり、
前記防食層の主面の表面粗度（Ｒａ）は１０μｍ以下であり、
前記接着層および前記耐食性金属層の厚さの合計が１．５ｍｍ以下であり、
前記端部シールは前記鋼製柱とは付着せずに、前記防食層の主面および前記耐食性金属層の主面に付着していて、その付着部分は、前記鋼製柱の長手方向において、各々３０ｍｍ以上であり、地表部にある前記端部シールは地表に接していない、被覆層付き鋼製柱。 It is a steel column with a coating layer that has been subjected to anticorrosion processing on the ground part,
Anticorrosion layer on the main surface of Chisai portion of the steel pillar, adhesive layer and has a corrosion-resistant metal layer in this order, has two end seals which cover the respective upper and lower end surfaces of the corrosion-resistant metal layer, said end The part seal is made of a polyethylene-based adhesive seal material whose adhesive surface is formed of a self-bonding butyl rubber adhesive , one of the end seals is on the ground surface, and the other is in the buried part,
The surface roughness (Ra) of the main surface of the anticorrosion layer is 10 μm or less,
The total thickness of the adhesive layer and the corrosion-resistant metal layer is 1.5 mm or less,
The end seal is not attached to the steel column, but is attached to the main surface of the anticorrosion layer and the main surface of the corrosion-resistant metal layer, and the attached portion is in the longitudinal direction of the steel column, Steel columns with a coating layer, each of which is 30 mm or more, and the end seals on the ground surface are not in contact with the ground surface. 前記防食層は前記地際部に付着していて、その付着部分は前記鋼製柱の長手方向において５００ｍｍ以上であり、
前記耐食性金属層は前記接着層を介して前記防食層と付着していて、その付着部分のうち地表部は、前記鋼製柱の長手方向において５０ｍｍ以上であり、その付着部分における前記地表部以外の部分である埋設部は、前記鋼製柱の長手方向において１００ｍｍ以上である、請求項１に記載の被覆層付き鋼製柱。 The anticorrosion layer is attached to the ground part, and the attached part is 500 mm or more in the longitudinal direction of the steel pillar,
The corrosion-resistant metal layer is attached to the anti-corrosion layer through the adhesive layer, and the ground surface portion of the adhered portion is 50 mm or more in the longitudinal direction of the steel column, and other than the ground surface portion in the adhered portion. 2. The steel column with a covering layer according to claim 1, wherein the embedded portion which is a portion of the steel column is 100 mm or more in a longitudinal direction of the steel column. 地際部に被覆層を形成して防食する既設鋼製柱の防食施工方法であって、
前記地際部の表面に、主面の表面粗度（Ｒａ）が１０μｍ以下である防食層を形成し、さらにその表面に接着層を介して前記接着層との厚さの合計が１．５ｍｍ以下である耐食性金属層を形成する被覆工程と、
前記耐食性金属層の上下両端面の各々を覆う２つの端部シールを、前記端部シールの一方は地表部に、もう一方は埋設部において、前記既設鋼製柱とは付着せずに、前記防食層の主面および前記耐食性金属層の主面に付着し、その付着部分が、前記既設鋼製柱の長手方向において各々３０ｍｍ以上となるように付着し、前記地表部の端部シールは地表に接しないようにする端部シール工程と、を備える既設鋼製柱の防食施工方法。 It is an anti-corrosion construction method for existing steel pillars that forms a coating layer on the ground and prevents corrosion,
An anticorrosion layer having a main surface with a surface roughness (Ra) of 10 μm or less is formed on the surface of the ground portion, and the total thickness of the adhesion layer and the adhesive layer is 1.5 mm on the surface. A coating process for forming a corrosion-resistant metal layer which is:
Two end seals covering each of the upper and lower end surfaces of the corrosion-resistant metal layer, one of the end seals is on the ground surface, and the other is an embedded portion without adhering to the existing steel pillar, Adhering to the main surface of the anticorrosion layer and the main surface of the corrosion-resistant metal layer, the adhering part is attached to be 30 mm or more in the longitudinal direction of the existing steel column, and the end seal of the surface part is the surface of the earth. An anti-corrosion construction method for an existing steel column, comprising: an end sealing step for preventing contact with the steel. 前記防食層は前記地際部に付着していて、その付着部分は前記既設鋼製柱の長手方向において５００ｍｍ以上であり、
前記耐食性金属層は前記接着層を介して前記防食層と付着していて、その付着部分のうち地表部は、前記既設鋼製柱の長手方向において５０ｍｍ以上であり、その付着部分における前記地表部以外の部分である埋設部は、前記既設鋼製柱の長手方向において１００ｍｍ以上である、請求項３に記載の既設鋼製柱の防食施工方法。 The anticorrosion layer is attached to the ground part, and the attached part is 500 mm or more in the longitudinal direction of the existing steel column,
The corrosion-resistant metal layer is attached to the anticorrosion layer via the adhesive layer, and a ground surface portion of the attached portion is 50 mm or more in the longitudinal direction of the existing steel column, and the surface portion in the attached portion is The method for preventing corrosion of an existing steel column according to claim 3, wherein the buried portion which is a part other than 100 mm is 100 mm or more in the longitudinal direction of the existing steel column.
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JP4992915B2 (en) * 2008-10-02 2012-08-08 泰夫 柿崎 A method of fixing the support by applying anticorrosion treatment and a cylindrical sleeve used for anticorrosion treatment
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