JP2018091075A - Anticorrosive construction structure of sheet pile cover, and anticorrosive construction method - Google Patents

Anticorrosive construction structure of sheet pile cover, and anticorrosive construction method Download PDF

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JP2018091075A
JP2018091075A JP2016236344A JP2016236344A JP2018091075A JP 2018091075 A JP2018091075 A JP 2018091075A JP 2016236344 A JP2016236344 A JP 2016236344A JP 2016236344 A JP2016236344 A JP 2016236344A JP 2018091075 A JP2018091075 A JP 2018091075A
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layer
gap
sealing material
anticorrosion
corrosion
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JP6792435B2 (en
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周 池田
Shu Ikeda
周 池田
義行 川瀬
Yoshiyuki Kawase
義行 川瀬
圭史 落部
Keishi Ochibe
圭史 落部
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Nippon Steel Anti Corrosion Co Ltd
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Nippon Steel and Sumikin Anti Corrosion Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an anticorrosive construction method which can achieve long-term durability by having a high salt-proof property for a long period and by a cut-off of ultraviolet radiation.SOLUTION: The anticorrosive construction method prevents corrosion by forming an anticorrosive layer 7, which includes an antirust layer, a plastic layer and protective layer on the lateral surface of a supporting part 5 in a marine structure 1, which has an upper concrete structure 3 and the supporting part that supports it from the underside. The anticorrosive construction method comprises an anticorrosive layer forming step to form the anticorrosion layer 7 on the lateral surface of the supporting part 5 so that a gap 9 is formed between the underside of the upper concrete structure 3 and the top surface of the anticorrosion layer 7, a press fit step to cause a sealant 11 to reach the lateral surface of the supporting part 5 by press fit of the sealant 11 to the gap 9, and a covering step to install a cover member 13 that closes the entrance of the gap 9.SELECTED DRAWING: Figure 1

Description

本発明は、防食施工構造体および防食施工方法に関する。   The present invention relates to an anticorrosion construction structure and an anticorrosion construction method.

海洋構造物の防食施工構造体および防食施工方法として、従来、いくつかの構造体および方法が提案されている。
例えば特許文献1には、被防食体の表面に防食層を配設し、該防食層の上に保護カバーを取り付ける鋼構造物の被覆防食方法において、前記防食層を、吸水性高分子の含有量が異なるペースト状ウレタン系樹脂の硬化層からなる内層及び表層から構成される2層構造であって、前記内層が前記表層より吸水性高分子を多く含有する防食層とし、該2層構造の防食層を前記保護カバーと一体化して被防食体に取り付けることを特徴とする鋼構造物の被覆防食方法が記載されている。また、ここで前記保護カバーの上下端部にエポキシ樹脂系のシールをすることが好ましい旨が記載されている。
Conventionally, several structures and methods have been proposed as an anticorrosion construction structure and an anticorrosion construction method for offshore structures.
For example, Patent Document 1 discloses a steel structure covering anticorrosion method in which an anticorrosion layer is provided on the surface of an anticorrosive body, and a protective cover is attached on the anticorrosion layer. A two-layer structure composed of an inner layer and a surface layer composed of a cured layer of a paste-like urethane resin having different amounts, wherein the inner layer is an anticorrosion layer containing more water-absorbing polymer than the surface layer, and the two-layer structure A method for coating corrosion protection of a steel structure is described in which a corrosion protection layer is integrated with the protective cover and attached to a body to be protected. In addition, it is described that it is preferable to seal the upper and lower ends of the protective cover with an epoxy resin.

特許第5888743号公報Japanese Patent No. 5888743

例えば特許文献1に記載のように保護カバーの上下端部にエポキシ樹脂系のシールをすることで、短期間においては当該部位を止水構造とすることは可能である。
しかし、シールの施工者の技能によってはシールの密着が不十分または不均一になり、波による保護カバーへの継続的な応力の付与によってシールの剥離、剥落や割れを生じることがあった。また、シール材に塩分が浸透し密着力が低下する場合があった。さらに、紫外線の影響でシールが劣化して密着度が低下した結果、同様にシール材が剥離する場合があった。シール材の剥離、剥落及び割れにより、防錆材の流出、当該部の局部的な腐食を生じる。このため場合により保護カバーの耐用年数に達していないにもかかわらず、補修が必要となる。
For example, as described in Patent Document 1, the upper and lower ends of the protective cover are sealed with an epoxy resin, so that the part can be made to have a water-stopping structure in a short period of time.
However, depending on the skill of the seal installer, the seal may be insufficiently or non-uniformly adhered, and continuous application of stress to the protective cover by waves may cause peeling, peeling or cracking of the seal. In addition, salt may permeate into the sealing material and adhesion may be reduced. Further, as a result of the deterioration of the seal due to the influence of ultraviolet rays and the decrease in the degree of adhesion, the sealing material may peel off in the same manner. The seal material is peeled off, peeled off and cracked, and the rust preventive material flows out and local corrosion occurs. For this reason, repair is necessary even if the service life of the protective cover has not been reached.

本発明は上記のような課題を解決することを目的とする。すなわち、本発明の目的は、長期にわたって遮塩性が高く、紫外線が遮断されていることと、シール材への応力の伝達を防止することで、長期耐久性を達成することができる防食施工構造体および防食施工方法を提供することである。   An object of the present invention is to solve the above problems. That is, the object of the present invention is to provide a corrosion-proof construction structure that can achieve long-term durability by preventing salt from being transmitted over a long period of time, blocking ultraviolet rays, and transmitting stress to the sealing material. It is to provide a body and anticorrosion construction method.

本発明者は鋭意検討し、上記課題を解決する防食施工構造体および防食施工方法を見出して本発明を完成させた。
本発明の防食施工構造体は、
上部コンクリート構造物およびそれを下面から支える支持部を有する海洋構造物における前記支持部の側面に配置される、防錆層、プラスチック層および保護層を含む防食層を含む防食施工構造体であって、
前記上部コンクリート構造物の下面と前記防食層の上面との間の隙間に配置され、前記シール材を前記支持部の側面にまで到達している圧入体と、
前記隙間の入口を塞ぎ前記シール材への応力の伝達を防止するカバー部材と、
を有する防食施工構造体である。
The inventor has intensively studied and found an anticorrosion construction structure and an anticorrosion construction method that solve the above-mentioned problems, and completed the present invention.
The anticorrosion construction structure of the present invention is
An anti-corrosion construction structure including an anti-corrosion layer including a rust prevention layer, a plastic layer, and a protection layer disposed on a side surface of the upper concrete structure and an offshore structure having a support portion that supports the upper concrete structure from the lower surface. ,
A press-fit body arranged in a gap between the lower surface of the upper concrete structure and the upper surface of the anticorrosion layer, and reaching the sealing material to the side surface of the support portion;
A cover member that closes the entrance of the gap and prevents transmission of stress to the sealing material;
It is the anticorrosion construction structure which has.

また、本発明の防食施工方法は、
上部コンクリート構造物およびそれを下面から支える支持部を有する海洋構造物における前記支持部の側面に、防錆層、プラスチック層および保護層を含む防食層を形成して防食する防食施工方法であって、
前記上部コンクリート構造物の下面と前記防食層の上面との間に隙間が形成されるように、前記支持部の側面に前記防食層を形成する防食層形成工程と、
前記隙間へシール材を圧入して、前記シール材を前記支持部の側面にまで到達させる圧入工程と、
前記隙間の入口を塞ぎ前記シール材への応力の伝達を防止するカバー部材を設置するカバー工程と、
を備える、防食施工方法である。
In addition, the anticorrosion construction method of the present invention,
An anti-corrosion method for forming an anti-corrosion layer including an anti-rust layer, a plastic layer, and a protective layer on a side surface of an upper concrete structure and an offshore structure having a support portion that supports the upper concrete structure from the lower surface. ,
An anti-corrosion layer forming step of forming the anti-corrosion layer on the side surface of the support portion so that a gap is formed between the lower surface of the upper concrete structure and the upper surface of the anti-corrosion layer;
A press-fitting step of press-fitting a sealing material into the gap and causing the sealing material to reach the side surface of the support;
A cover step of installing a cover member that closes the entrance of the gap and prevents transmission of stress to the sealing material;
It is the anticorrosion construction method provided with.

以下において、単に「本発明」と記した場合、「本発明の防食施工構造体」および「本発明の防食成功方法」のいずれをも意味するものとする。   In the following, when simply described as “the present invention”, it means both “the anticorrosion construction structure of the present invention” and “the anticorrosion success method of the present invention”.

本発明によれば、長期にわたって遮塩性が高く、紫外線が遮断されていることと、波により発生した応力がシール材に伝達しないことで、長期耐久性を達成することができる防食施工構造体および防食施工方法を提供することができる。   According to the present invention, the anticorrosion construction structure is capable of achieving long-term durability by being highly salt-blocking over a long period of time and blocking ultraviolet rays and not transmitting stress generated by waves to the sealing material. And an anticorrosion construction method can be provided.

本発明の防食施工構造体および防食施工方法の一態様を説明するための概略断面図である。It is a schematic sectional drawing for demonstrating the one aspect | mode of the anticorrosion construction structure and the anticorrosion construction method of this invention. 本発明の防食施工構造体および防食施工方法の別の一態様を説明するための概略断面図である。It is a schematic sectional drawing for demonstrating another one aspect | mode of the anticorrosion construction structure and anticorrosion construction method of this invention.

本発明について説明する。
本発明において海洋構造物とは、海洋環境にさらされている構造物を意味し、上部コンクリート構造物およびそれを下面から支える支持部を有するものである。このような海洋構造物としては、
例えば、橋梁、桟橋、防波堤、護岸、岸壁が挙げられる。
例えば海洋構造物が橋梁である場合、上部コンクリート構造物は橋梁における道路等の部分に相当し、支持部は橋脚(鋼管杭等)に相当する。
また、例えば海洋構造物が防波堤である場合、上部コンクリート構造物は防波堤における道路等の部分に相当し、支持部は護岸鋼矢板または護岸鋼管矢板等に相当する。
The present invention will be described.
In the present invention, the marine structure means a structure exposed to the marine environment, and has an upper concrete structure and a support portion that supports the upper concrete structure from the lower surface. As such an offshore structure,
Examples include bridges, piers, breakwaters, revetments, and quay walls.
For example, when the offshore structure is a bridge, the upper concrete structure corresponds to a portion of the bridge such as a road, and the support portion corresponds to a pier (such as a steel pipe pile).
For example, when the offshore structure is a breakwater, the upper concrete structure corresponds to a portion of a road or the like on the breakwater, and the support portion corresponds to a revetment steel sheet pile or a revetment steel pipe sheet pile.

本発明について、海洋構造物が橋梁である場合を挙げ、図1を用いて説明する。図1は橋梁の概略図である。   The present invention will be described with reference to FIG. 1 by citing a case where the offshore structure is a bridge. FIG. 1 is a schematic view of a bridge.

図1(a)において、海洋構造物としての橋梁1は、上部コンクリート構造物としての道路部3と、支持部としての鋼管杭5とを有している。鋼管杭5は道路部3の下面3A側から、道路部3を支えている。   In FIG. 1A, a bridge 1 as an offshore structure has a road portion 3 as an upper concrete structure and a steel pipe pile 5 as a support portion. The steel pipe pile 5 supports the road portion 3 from the lower surface 3A side of the road portion 3.

<防食層形成工程>
本発明では、このような橋梁1における鋼管杭5の側面に、防錆層、プラスチック層および保護層を含む防食層を形成して防食する。ここで、図1(b)に示すように道路部3の下面3Aと、防食層7の上面7Aとの間に、隙間9が形成されるように鋼管杭5の側面に防食層7を形成する。
<Anti-corrosion layer forming step>
In the present invention, an anticorrosion layer including a rust prevention layer, a plastic layer, and a protection layer is formed on the side surface of the steel pipe pile 5 in the bridge 1 to prevent corrosion. Here, as shown in FIG. 1 (b), the anticorrosion layer 7 is formed on the side surface of the steel pipe pile 5 so that a gap 9 is formed between the lower surface 3A of the road portion 3 and the upper surface 7A of the anticorrosion layer 7. To do.

隙間の幅(図1(b)においてXで表している)は特に限定されないが、1〜100mm程度であることが好ましく、5〜50mm程度であることがより好ましく、10〜20mm程度であることがさらに好ましい。なお、道路部3の下面3Aは塩分等の影響で凹凸であることが多い。このような場合、隙間の幅(X)は鋼管杭5の中心軸に平行な方向における、道路部3の下面3Aと、防食層7の上面7Aとの最短距離を意味するものとする。   The width of the gap (represented by X in FIG. 1B) is not particularly limited, but is preferably about 1 to 100 mm, more preferably about 5 to 50 mm, and about 10 to 20 mm. Is more preferable. The lower surface 3A of the road portion 3 is often uneven due to the influence of salt or the like. In such a case, the width (X) of the gap means the shortest distance between the lower surface 3A of the road portion 3 and the upper surface 7A of the anticorrosion layer 7 in the direction parallel to the central axis of the steel pipe pile 5.

鋼管杭5の側面に形成する防食層について説明する。
防食層は、内側(すなわち鋼管杭5の表面)から外側へ向かって順に、防錆層、プラスチック層および保護層を形成して得ることができる。ここで防錆層とプラスチック層との間に遮水層をさらに形成してもよい。
The anticorrosion layer formed on the side surface of the steel pipe pile 5 will be described.
The anticorrosion layer can be obtained by forming a rust prevention layer, a plastic layer, and a protective layer in order from the inside (ie, the surface of the steel pipe pile 5) to the outside. Here, a water shielding layer may be further formed between the rust prevention layer and the plastic layer.

防錆層は、鋼管杭5(支持部)の外面に密着するように形成する。
防錆層は、特に限定されず、例えば、従来公知のものを用いることができる。例えば、市販の防錆剤(ペトロラタム、酸化重合樹脂、エポキシ樹脂など)を含浸した帯状の布を用いることができ、これを鋼管杭5(支持部)の外周面に巻き付けることで防錆層を形成することができる。また、例えば、ペトロラタムシートの表面にペトロラタムペーストを塗り、ペトロラタムペーストが内側になるように、ペトロラタムシートを鋼管杭5(支持部)の表面に張り付けることで防錆層を形成することもできる。
A rust prevention layer is formed so that it may adhere to the outer surface of steel pipe pile 5 (support part).
The antirust layer is not particularly limited, and for example, a conventionally known layer can be used. For example, a strip-shaped cloth impregnated with a commercially available rust preventive agent (such as petrolatum, an oxidative polymerization resin, or an epoxy resin) can be used, and the rust preventive layer is formed by winding this around the outer peripheral surface of the steel pipe pile 5 (support portion). Can be formed. In addition, for example, a rust-preventing layer can be formed by applying a petrolatum paste to the surface of the petrolatum sheet and sticking the petrolatum sheet to the surface of the steel pipe pile 5 (support portion) so that the petrolatum paste is inside.

防錆層の形成に先だって、例えば、鋼管杭5(支持部)の表面付着物を除去し、スクレーパやワイヤブラシ、機械ブラシ、グラインダーのような手工具および動力工具(例えば、オートジゼル、エアーグラインダー、サンドブラスト)等で素地調整することが好ましい。   Prior to the formation of the anticorrosive layer, for example, surface deposits on the steel pipe pile 5 (supporting portion) are removed, and hand tools and power tools such as scrapers, wire brushes, mechanical brushes and grinders (for example, auto giselle, air grinders) , Sand blasting) or the like.

遮水層は、例えば、プラスチックシートを防錆層の外周面に密着するように巻きつけて形成する。この遮水層により、防錆層と海水との接触が抑制される。   The water shielding layer is formed by, for example, winding a plastic sheet so as to be in close contact with the outer peripheral surface of the rust prevention layer. By this water shielding layer, contact between the rust preventing layer and seawater is suppressed.

プラスチック層は、防錆層または遮水層の外周側に形成する。
プラスチック層は、発泡プラスチック層であることが好ましい。例えば三次元の方向に連通した多数の孔を有する市販の発泡ポリエチレンからなる発泡プラスチックを用いることができる。
プラスチックからなる帯状のシートを防錆層または遮水層の外周側に巻き付けることによって、プラスチック層を形成することができる。
The plastic layer is formed on the outer peripheral side of the rust prevention layer or the water shielding layer.
The plastic layer is preferably a foamed plastic layer. For example, a foamed plastic made of commercially available foamed polyethylene having a large number of holes communicating in a three-dimensional direction can be used.
A plastic layer can be formed by winding a belt-shaped sheet made of plastic around the outer periphery of the rust-proof layer or water-proof layer.

保護層は、プラスチック層の外周側に形成する。
保護層として用いる薄板は、耐食性金属からなることが好ましい。耐食性金属の種類は特に限定されない。例えば、耐食性金属として、チタン、チタン合金、ステンレスが挙げられ、チタンまたはチタン合金であることが好ましい。これ以外にも、薄板として、FRP、PE(ポリエチレン)を用いることができる。
保護層に用いられる薄板の板厚も特に限定されないが0.3〜3.0mmが好ましい。軽量であり施工時の取扱いが容易だからである。
薄板の周方向の長さも特に限定されないが1,000〜3,000mmが好ましい。
また、薄板は周方向や鋼管杭の縦方向に2以上を接合したものであってもよい。
The protective layer is formed on the outer peripheral side of the plastic layer.
The thin plate used as the protective layer is preferably made of a corrosion-resistant metal. The kind of corrosion-resistant metal is not particularly limited. For example, titanium, a titanium alloy, and stainless steel are mentioned as a corrosion-resistant metal, and it is preferable that it is titanium or a titanium alloy. In addition, FRP and PE (polyethylene) can be used as the thin plate.
The thickness of the thin plate used for the protective layer is not particularly limited, but is preferably 0.3 to 3.0 mm. This is because it is lightweight and easy to handle during construction.
The length of the thin plate in the circumferential direction is not particularly limited, but is preferably 1,000 to 3,000 mm.
Moreover, the thin plate may be obtained by joining two or more in the circumferential direction or the longitudinal direction of the steel pipe pile.

<圧入工程>
本発明では、図1(b)に示した隙間9へシール材11を圧入する。シール材11は、図1(c)に示すように鋼管杭5の側面5Aにまで到達させる。なお、図1(c)は、右側に記された隙間9のみシール材11を圧入し、左側の記された隙間9には未だシール材11を圧入していない図である。
シール材11を鋼管杭5の側面5Aに到達させることで、シール材11を隙間9へ充填することができる。
その結果、特に防錆層と鋼管杭5(支持部)との間への塩分の侵入を防ぎ防錆層の流出を防ぐことができる。
<Press-fit process>
In the present invention, the sealing material 11 is press-fitted into the gap 9 shown in FIG. The sealing material 11 reaches the side surface 5A of the steel pipe pile 5 as shown in FIG. FIG. 1C is a view in which the sealing material 11 is press-fitted only into the gap 9 shown on the right side, and the sealing material 11 is not yet press-fitted into the gap 9 shown on the left side.
By allowing the sealing material 11 to reach the side surface 5 </ b> A of the steel pipe pile 5, the sealing material 11 can be filled into the gap 9.
As a result, it is possible to prevent the entry of salt between the rust prevention layer and the steel pipe pile 5 (support portion), and to prevent the rust prevention layer from flowing out.

シール材は特に限定されないが、例えば弾性エポキシ系のパテ材などを用いることができる。他にもシリコン、変性シリコン、アクリル系シーリング材を用いることができる。   The sealing material is not particularly limited, and for example, an elastic epoxy-based putty material or the like can be used. In addition, silicon, modified silicon, and an acrylic sealant can be used.

<カバー工程>
本発明では、隙間9へシール材11を圧入した後、図1(d)に示すように、隙間9の入口を塞ぐカバー部材13を設置する。また、カバー部材13を設置することで、波浪等による応力がシール材11に伝達されることを防止し、さらに保護層の変形を抑制することで、その結果シール材11の剥離、剥落、割れを防止することが出来る。カバー部材13を取り付けない場合、シール材11は波浪等による応力を直接受け、各面からはがれてしまう可能性が相対的に高まる。
<Cover process>
In the present invention, after the sealing material 11 is press-fitted into the gap 9, a cover member 13 that closes the inlet of the gap 9 is installed as shown in FIG. Further, by installing the cover member 13, stress due to waves and the like is prevented from being transmitted to the sealing material 11, and further, the deformation of the protective layer is suppressed, and as a result, the sealing material 11 is peeled off, peeled off, and cracked. Can be prevented. When the cover member 13 is not attached, the sealing material 11 is directly subjected to stress due to waves or the like, and the possibility of peeling off from each surface is relatively increased.

カバー部材13の形状は特に限定されず、例えば図1(d)に示すような板状のものであってよい。大きさ等も特に限定されない。   The shape of the cover member 13 is not particularly limited, and may be, for example, a plate shape as shown in FIG. The size and the like are not particularly limited.

カバー部材13の材質は特に限定されず、例えば保護層と同じ材質のものを用いることができる。   The material of the cover member 13 is not particularly limited, and for example, the same material as the protective layer can be used.

カバー部材13は、防食層7の最表面(通常は保護層)に付けるが、その方法は特に限定されない。例えば、防食層7の最表面が保護層であり、その保護層が金属からなり、さらにカバー部材13も金属からなる場合は、保護層へカバー部材13を溶接して付けることができる。また、予め保護層の表面にスタッドボルトを付けておき、カバー部材13にも予め長孔を開けておき、長孔をスタッドボルトへ通してナットで締め付けることで、双方を結合することができる。保護層およびカバー部材がプラスチック(FRP等)の場合も同様に、ボルトとナットを用いて双方を結合することができる。   The cover member 13 is attached to the outermost surface (usually a protective layer) of the anticorrosion layer 7, but the method is not particularly limited. For example, when the outermost surface of the anticorrosion layer 7 is a protective layer, the protective layer is made of metal, and the cover member 13 is also made of metal, the cover member 13 can be welded to the protective layer. Moreover, a stud bolt is previously attached to the surface of the protective layer, a long hole is opened in the cover member 13 in advance, and the long hole is passed through the stud bolt and tightened with a nut, whereby both can be coupled. Similarly, when the protective layer and the cover member are made of plastic (FRP or the like), both can be coupled using bolts and nuts.

上記のような本発明は、長期にわたって遮塩性が高く、紫外線が遮断されていること、波により発生した応力がシール材に伝達しないことで、長期耐久性を達成することができる防食施工構成とその方法である。さらに保護層の変形を抑制することで、その結果シール材11の剥離、剥落、割れを防止することが出来る。カバー部材13を取り付けない場合、シール材11は波浪等による応力を直接受け、各面からはがれてしまう可能性が相対的に高まる。   The present invention as described above has a high anti-salt property over a long period of time, and the anti-corrosion construction configuration that can achieve long-term durability by preventing ultraviolet rays from being shielded and transmitting stress generated by waves to the sealing material. And how. Further, by suppressing the deformation of the protective layer, it is possible to prevent the sealing material 11 from peeling off, peeling off or cracking. When the cover member 13 is not attached, the sealing material 11 is directly subjected to stress due to waves or the like, and the possibility of peeling off from each surface is relatively increased.

図1(d)は、上記のようにして形成された本発明の防食施工構造体の一例を示している。   FIG.1 (d) has shown an example of the anticorrosion construction structure of this invention formed as mentioned above.

次に、海洋構造物が護岸である場合を挙げ、本発明の防食施工方法について図2を用いて説明する。図2は護岸の概略断面図である。   Next, the case where an offshore structure is a revetment is mentioned and the anticorrosion construction method of this invention is demonstrated using FIG. FIG. 2 is a schematic sectional view of the revetment.

図2(a)において、海洋構造物としての護岸1は、上部コンクリート構造物としての道路部3と、支持部としての鋼矢板5とを有している。鋼矢板5は道路部3の下面3A側から、道路部3を支えている。なお、鋼矢板は鋼管矢板であってもよい。   In Fig.2 (a), the revetment 1 as an offshore structure has the road part 3 as an upper concrete structure, and the steel sheet pile 5 as a support part. The steel sheet pile 5 supports the road portion 3 from the lower surface 3A side of the road portion 3. The steel sheet pile may be a steel pipe sheet pile.

<防食層形成工程>
本発明では、このような護岸1における鋼矢板5の側面に、防錆層、プラスチック層および保護層を含む防食層を形成して防食する。ここで、図2(b)に示すように道路部3の下面3Aと、防食層7の上面7Aとの間に、隙間9が形成されるように鋼矢板5の側面に防食層7を形成する。
<Anti-corrosion layer forming step>
In the present invention, an anticorrosion layer including a rust prevention layer, a plastic layer and a protection layer is formed on the side surface of the steel sheet pile 5 in such a revetment 1 to prevent corrosion. Here, as shown in FIG. 2 (b), the anticorrosion layer 7 is formed on the side surface of the steel sheet pile 5 so that a gap 9 is formed between the lower surface 3A of the road portion 3 and the upper surface 7A of the anticorrosion layer 7. To do.

隙間の幅(図2(b)においてXで表している)は特に限定されず、前述の橋梁の場合(図1を用いた説明の場合)と同様であってよい。
鋼矢板5の側面に形成する防食層、遮水層、プラスチック層および保護層についても、前述の橋梁の場合(図1を用いた説明の場合)と同様であってよい。
The width of the gap (represented by X in FIG. 2B) is not particularly limited, and may be the same as in the case of the bridge described above (in the case of the description using FIG. 1).
The anticorrosion layer, the water shielding layer, the plastic layer, and the protective layer formed on the side surface of the steel sheet pile 5 may also be the same as in the case of the above-described bridge (in the case of the description using FIG. 1).

<圧入工程>
本発明では、図2(b)に示した隙間9へシール材11を圧入する。シール材11は、図2(c)に示すように鋼管杭5の側面5Aにまで到達させる。
シール材11を鋼矢板5の側面5Aに到達させることで、シール材11を隙間9へ充填することができる。この効果については、前述の橋梁の場合と同様である。
シール材の種類についても、前述の橋梁の場合と同様であってよい。
<Press-fit process>
In the present invention, the sealing material 11 is press-fitted into the gap 9 shown in FIG. The sealing material 11 reaches the side surface 5A of the steel pipe pile 5 as shown in FIG.
By causing the sealing material 11 to reach the side surface 5 </ b> A of the steel sheet pile 5, the sealing material 11 can be filled into the gap 9. About this effect, it is the same as that of the case of the above-mentioned bridge.
The type of the sealing material may be the same as in the case of the bridge described above.

<カバー工程>
本発明では、隙間9へシール材11を圧入した後、図2(d)に示すように、隙間9の入口を塞ぐカバー部材13を設置する。
<Cover process>
In the present invention, after the sealing material 11 is press-fitted into the gap 9, a cover member 13 that closes the inlet of the gap 9 is installed as shown in FIG.

カバー部材13の形状、大きさ、材質、設置方法等については、前述の橋梁の場合と同様であってよい。   The shape, size, material, installation method, and the like of the cover member 13 may be the same as in the case of the bridge described above.

防錆対象となる鋼矢板や鋼管矢板に防錆層、プラスチック層および保護層を形成する場合、鋼矢板や鋼管矢板にスタッドボルトを付け、そのスタッドボルトに、予め穴を形成した防錆層、プラスチック層および保護層を通し、ナットを締めて保護層を形成する場合があるが、カバー部材にも穴を開けておき、防錆層、プラスチック層および保護層とともにカバー部材の穴にもスタッドボルトを通し、ナットで締めつけることで、カバー部材を設置することもできる。   When forming a rust prevention layer, a plastic layer and a protection layer on a steel sheet pile or steel pipe sheet pile that is subject to rust prevention, a stud bolt is attached to the steel sheet pile or steel pipe sheet pile, and a rust prevention layer in which a hole has been previously formed in the stud bolt, A protective layer may be formed by passing a plastic layer and a protective layer and tightening a nut, but a hole is also made in the cover member, and a stud bolt is also installed in the hole of the cover member together with the anticorrosive layer, the plastic layer and the protective layer. The cover member can also be installed by tightening with a nut.

上記のような本発明は、長期にわたって遮塩性が高く、紫外線が遮断されていることで、長期耐久性を達成することができる防食施工方法である。   The present invention as described above is an anticorrosion construction method capable of achieving long-term durability by having high salt-shielding properties over a long period of time and blocking ultraviolet rays.

図2(d)は、上記のようにして形成された本発明の防食施工構造体の一例を示している。   FIG.2 (d) has shown an example of the anticorrosion construction structure of this invention formed as mentioned above.

1 海洋構造物(橋梁、護岸)
3 上部コンクリート構造物(道路部)
3A 上部コンクリート構造物の下面
5 支持部(鋼管杭、鋼矢板)
5A 支持部の表面
7 防食層
7A 防食層の上面
9 隙間
11 シール材
13 カバー部材
X 隙間の幅
1 offshore structure (bridge, revetment)
3 Upper concrete structure (road part)
3A Lower surface of upper concrete structure 5 Supporting part (steel pipe pile, steel sheet pile)
5A Surface of support portion 7 Anticorrosion layer 7A Upper surface of anticorrosion layer 9 Gap 11 Seal material 13 Cover member X Gap width

Claims (2)

上部コンクリート構造物およびそれを下面から支える支持部を有する海洋構造物における前記支持部の側面に配置される、防錆層、プラスチック層および保護層を含む防食層を含む防食施工構造体であって、
前記上部コンクリート構造物の下面と前記防食層の上面との間の隙間に配置され、前記シール材を前記支持部の側面にまで到達している圧入体と、
前記隙間の入口を塞ぎ前記シール材への応力の伝達を防止するカバー部材と、
を有する防食施工構造体。
An anti-corrosion construction structure including an anti-corrosion layer including a rust prevention layer, a plastic layer, and a protection layer disposed on a side surface of the upper concrete structure and an offshore structure having a support portion that supports the upper concrete structure from the lower surface. ,
A press-fit body arranged in a gap between the lower surface of the upper concrete structure and the upper surface of the anticorrosion layer, and reaching the sealing material to the side surface of the support portion;
A cover member that closes the entrance of the gap and prevents transmission of stress to the sealing material;
Corrosion-proof construction structure.
上部コンクリート構造物およびそれを下面から支える支持部を有する海洋構造物における前記支持部の側面に、防錆層、プラスチック層および保護層を含む防食層を形成して防食する防食施工方法であって、
前記上部コンクリート構造物の下面と前記防食層の上面との間に隙間が形成されるように、前記支持部の側面に前記防食層を形成する防食層形成工程と、
前記隙間へシール材を圧入して、前記シール材を前記支持部の側面にまで到達させる圧入工程と、
前記隙間の入口を塞ぎ前記シール材への応力の伝達を防止するカバー部材を設置するカバー工程と、
を備える、防食施工方法。
An anti-corrosion method for forming an anti-corrosion layer including an anti-rust layer, a plastic layer, and a protective layer on a side surface of an upper concrete structure and an offshore structure having a support portion that supports the upper concrete structure from the lower surface. ,
An anti-corrosion layer forming step of forming the anti-corrosion layer on the side surface of the support portion so that a gap is formed between the lower surface of the upper concrete structure and the upper surface of the anti-corrosion layer;
A press-fitting step of press-fitting a sealing material into the gap and causing the sealing material to reach the side surface of the support;
A cover step of installing a cover member that closes the entrance of the gap and prevents transmission of stress to the sealing material;
An anticorrosion construction method comprising:
JP2016236344A 2016-12-06 2016-12-06 Anti-corrosion construction structure and anti-corrosion construction method for sheet pile cover Active JP6792435B2 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07268894A (en) * 1994-04-04 1995-10-17 Nippon Steel Corp Connection structure of metal-coated corrosion protective member
KR200344120Y1 (en) * 2003-12-02 2004-03-09 주식회사 우성 Covering structure of the sea jettypile
JP2005113472A (en) * 2003-10-07 2005-04-28 Nippon Corrosion Engineering Co Ltd Protective cover installing structure of columnar body
JP2013119704A (en) * 2011-12-06 2013-06-17 Nippon Steel & Sumikin Anti-Corrosion Co Ltd Corrosion protection work method for steel pipe pile

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07268894A (en) * 1994-04-04 1995-10-17 Nippon Steel Corp Connection structure of metal-coated corrosion protective member
JP2005113472A (en) * 2003-10-07 2005-04-28 Nippon Corrosion Engineering Co Ltd Protective cover installing structure of columnar body
KR200344120Y1 (en) * 2003-12-02 2004-03-09 주식회사 우성 Covering structure of the sea jettypile
JP2013119704A (en) * 2011-12-06 2013-06-17 Nippon Steel & Sumikin Anti-Corrosion Co Ltd Corrosion protection work method for steel pipe pile

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