JPH06122173A - High strength highly corrosion protective steel pipe sheet pile for riprap execution - Google Patents
High strength highly corrosion protective steel pipe sheet pile for riprap executionInfo
- Publication number
- JPH06122173A JPH06122173A JP27432692A JP27432692A JPH06122173A JP H06122173 A JPH06122173 A JP H06122173A JP 27432692 A JP27432692 A JP 27432692A JP 27432692 A JP27432692 A JP 27432692A JP H06122173 A JPH06122173 A JP H06122173A
- Authority
- JP
- Japan
- Prior art keywords
- coating layer
- steel pipe
- pipe sheet
- sheet pile
- protective coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Nozzles (AREA)
- Electrostatic Spraying Apparatus (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、海洋、港湾等で使用さ
れる重防食被覆鋼管矢板において水中及び空中にわたっ
て使用されるために防食機能を必要とし、鋼管矢板の施
工後に捨石施工を実施するために耐衝撃性を必要とする
重防食被覆鋼管矢板に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention requires an anticorrosion function for use in heavy anticorrosion coated steel pipe sheet piles used in the ocean, harbors, etc. over water and in the air, and carries out rubble construction after the construction of steel pipe sheet piles. Therefore, the present invention relates to a heavy-duty anticorrosion coated steel pipe sheet pile that requires impact resistance.
【０００２】[0002]
【従来の技術】海洋、港湾等で使用される鋼管矢板は、
厳しい使用環境にさらされ中でも干満帯の腐食は深刻な
問題である。そのため周知のようにポリオレフィン樹脂
もしくはポリウレタン樹脂の重防食被覆鋼材が広く使用
されるようになった。これらの重防食被覆鋼材は、防食
性のみならず流木等の衝撃にも十分耐えられるような機
械的性質を保有している。2. Description of the Related Art Steel pipe sheet piles used in the ocean, harbors, etc.
Corrosion of the tidal range is a serious problem even when exposed to severe usage environments. Therefore, as is well known, heavy-corrosion coated steel materials made of polyolefin resin or polyurethane resin have been widely used. These heavy anticorrosion coated steel materials have not only anticorrosion properties but also mechanical properties that can sufficiently withstand the impact of driftwood and the like.
【０００３】ところが、近年になって鋼管矢板の打設場
所によって護岸等の目的により打設後に直径２００ｍｍ
前後の捨石の施工が実施されるようになり、従来以上に
機械的作用条件の厳しい場所での使われ方が増えてきて
おり、従来の重防食被覆では防食被覆層が貫通する疵も
発生するなど、機械強度が不十分になってきている。そ
のため、このような用途に対しては、捨石施工前に鋼管
矢板に保護カバーをセットする必要があり、コスト面で
大きな問題であった。そこで本発明者等は被覆の機械強
度を向上させるために特開平０４−０７１８４２号公報
に防食被覆層の表面に植毛材を介在させ繊維強化プラス
チックを被覆して得られる強化プラスチック複合被覆鋼
材を提供している。In recent years, however, the diameter of the steel pipe sheet pile is 200 mm after it has been driven for the purpose of revetment or the like depending on the location.
Since the rubble before and after is now being used, it is being used more in places where mechanical action conditions are more severe than before, and in conventional heavy-duty anticorrosion coatings, flaws that penetrate the anticorrosion coating layer also occur. For example, the mechanical strength is becoming insufficient. Therefore, for such an application, it is necessary to set a protective cover on the steel pipe sheet pile before the rubble construction, which is a big problem in terms of cost. In order to improve the mechanical strength of the coating, the inventors of the present invention provide a reinforced plastic composite coated steel material obtained by coating a fiber reinforced plastic with a flocking material interposed on the surface of an anticorrosion coating layer in JP-A-04-071842. is doing.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記の
強化プラスチック複合被覆鋼材には、つぎのような問題
がある。However, the above reinforced plastic composite coated steel material has the following problems.
【０００５】まず防食被覆層がポリオレフィン樹脂の場
合、一般に押出被覆やシート貼付け等にて被覆するた
め、鋼管矢板のように複雑な形状物には被覆できない。
他方、防食被覆層が熱硬化性樹脂の場合には、鋼管矢板
への被覆は可能であるが、捨石施工のような厳しい衝撃
条件では必ずしも充分な耐久性はなく、捨石施工後に大
きく鋼面が露出するような疵は発生しないが、ピンホー
ル程度のものは発生する。First, when the anticorrosion coating layer is a polyolefin resin, it is generally coated by extrusion coating or sheet attachment, so that it cannot be coated on a complicated shape such as a steel pipe sheet pile.
On the other hand, when the anticorrosion coating layer is a thermosetting resin, it is possible to coat the steel pipe sheet pile, but it does not always have sufficient durability under severe impact conditions such as rubble stone construction, and a large steel surface after rubble stone construction. Exposed flaws do not occur, but pinhole-like defects do occur.
【０００６】上述のような問題に対し、本発明は防食被
覆層と保護被覆層との間に充分な密着力を与えると共に
保護被覆層に充分な耐衝撃性を保持させ、捨石施工の厳
しい衝撃条件に対し大きな損傷がないようにすると共
に、万一損傷しても剥落することなく少なくとも防食被
覆層は健全に保つようにすることにより、捨石施工に耐
えうる重防食被覆鋼管矢板を提供することを目的として
いる。In order to solve the above problems, the present invention provides a sufficient adhesion between the anticorrosion coating layer and the protective coating layer and allows the protective coating layer to retain sufficient impact resistance, so that the severe impact of rubble stone construction To provide a heavy anticorrosion coated steel pipe sheet pile that can withstand rubble construction by making sure that at least the anticorrosion coating layer does not fall off even if it is damaged and at least keeps the corrosion protection layer sound even if it is damaged. It is an object.
【０００７】[0007]
【課題を解決するための手段】すなわち本発明は、鋼管
矢板にグリットブラスト、サンドブラスト、ショットブ
ラスト等で除錆した鋼管矢板上に、有機系プライヤーの
下地処理層、膜厚２ｍｍ以上のポリウレタン樹脂による
防食被覆層、膜厚１．５ｍｍ以上のガラスフレーク入り
のビニルエステル、ポリエステルもしくはエポキシの保
護被覆層が順次形成され、且つ防食被覆層と保護被覆層
との界面に長さが１ｍｍ以上５ｍｍ以下の有機系繊維も
しくは無機系繊維の植毛材が介在されていることを特徴
とする捨石施工用高強度重防食被覆鋼管矢板である。Means for Solving the Problems That is, according to the present invention, a steel pipe sheet pile, which has been rust-proofed by grit blasting, sand blasting, shot blasting, etc. on a steel pipe sheet pile, is provided with an undercoating layer of organic pliers and a polyurethane resin having a thickness of 2 mm or more. An anticorrosion coating layer, a glass flake-containing vinyl ester, polyester or epoxy protective coating layer having a thickness of 1.5 mm or more is sequentially formed, and the length of the interface between the anticorrosion coating layer and the protective coating layer is 1 mm or more and 5 mm or less. A high-strength heavy-corrosion-coated steel pipe sheet pile for rubble construction, characterized by interposing a flocking material of organic fibers or inorganic fibers.
【０００８】以下に本発明における捨石施工用高強度重
防食被覆鋼管矢について具体的に説明する。The high-strength heavy-corrosion-coated steel pipe arrow for rubble stone construction according to the present invention will be specifically described below.
【０００９】本発明における捨石施工用高強度重防食被
覆鋼管矢の断面図を図１に示す。図において、１は鋼
材、２は下地処理層、３は防食被覆層、４は植毛材、５
は保護被覆層である。本発明の矢板を製造するに際して
は鋼材１の被覆面をショットブラスト、グリットブラス
ト、サンドブラストなどにより除錆した後、有機系プラ
イマーの下地処理層２を形成させる。下地処理層２が完
全に硬化後、その上に防食被覆層３を被覆する。防食被
覆層３は、従来より防食性能が高く評価され重防食被覆
鋼材に広く用いられているポリウレタン樹脂が良い。該
防食被覆層３が硬化する前に、無機系繊維もしくは有機
系繊維の植毛材４を静電植毛法やエアー吹きつけ等の方
法により、防食被覆層３に対しほぼ垂直に立てて付着さ
せる。防食被覆層３が完全に硬化後、保護被覆層５を被
覆する。以上、下地処理層２〜保護被覆層５まで全層共
吹き付けの方法により被覆あるいは植毛が可能であるた
め、鋼管矢板のような複雑な形状のものでも問題なく被
覆できる。FIG. 1 shows a cross-sectional view of a high-strength heavy-corrosion-coated steel pipe arrow for rubble stone construction according to the present invention. In the figure, 1 is a steel material, 2 is a base treatment layer, 3 is an anticorrosion coating layer, 4 is a flocked material, 5
Is a protective coating layer. In manufacturing the sheet pile of the present invention, the coated surface of the steel material 1 is rust-proofed by shot blasting, grit blasting, sand blasting or the like, and then the undercoating layer 2 of the organic primer is formed. After the undercoating layer 2 is completely cured, the anticorrosion coating layer 3 is coated thereon. The anticorrosion coating layer 3 is preferably made of a polyurethane resin which has been highly evaluated for its anticorrosion performance and is widely used in heavy-duty anticorrosion coated steel materials. Before the anticorrosion coating layer 3 is cured, a flocking material 4 made of inorganic fibers or organic fibers is made to stand substantially vertically to the anticorrosion coating layer 3 by a method such as electrostatic flocking or air blowing. After the anticorrosion coating layer 3 is completely cured, the protective coating layer 5 is coated. As described above, since coating or flocking can be performed by the method of co-spraying all layers from the base treatment layer 2 to the protective coating layer 5, even a complicated shape such as a steel pipe sheet pile can be coated without any problem.
【００１０】上記の下地処理層２としては、防食被覆層
３との密着性にすぐれたものであれば特に限定はない。
植毛材４は、防食被覆層３と保護被覆層５との接着に物
理的に寄与し鋼管矢板が捨石施工にて受ける衝撃により
万一保護被覆層５に割れが生じても剥落しないような密
着力を持つことが必要であるため、繊維の長さが１〜５
ｍｍの無機系繊維もしくは有機系繊維が適当である。繊
維が短かすぎると植毛材による物理的な密着力が充分に
得られず、また長すぎると防食被覆層３と保護被覆層５
との接触面積が小さくなり、その化学的な密着力が不充
分となる。また植毛材の散布量は、少なすぎても多すぎ
ても被覆層３と保護被覆層５との密着力が不十分となる
ため、植毛材の種類によっても異なるが、３〜５０ｇ／
ｍ2 が望ましい。保護被覆層５は厳しい捨石施工の厳し
い衝撃条件に耐えうる必要性からガラスフレーク入りの
ビニルエステル、ポリエステルもしくはエポキシが良
く、また保護被覆層５の膜厚は１．５ｍｍ以上が良い。
膜厚が薄いと、捨石施工時保護被覆層５の機械強度が不
充分となり、防食被覆層３まで大きく損傷することにな
る。また保護被覆層５は、保護被覆としての機能を失わ
ない範囲であれば、美観を保つために着色等を施しても
構わない。The base treatment layer 2 is not particularly limited as long as it has excellent adhesion to the anticorrosion coating layer 3.
The flocked material 4 physically contributes to the adhesion between the anticorrosion coating layer 3 and the protective coating layer 5 and adheres so that the protective coating layer 5 does not come off even if the protective coating layer 5 is cracked by the impact that the steel pipe sheet pile receives during the rubble construction. Since it is necessary to have strength, the fiber length is 1 to 5
mm inorganic or organic fibers are suitable. If the fibers are too short, the physical adhesion of the flocked material cannot be sufficiently obtained, and if the fibers are too long, the anticorrosion coating layer 3 and the protective coating layer 5 are provided.
The contact area with and becomes small, and its chemical adhesion becomes insufficient. Moreover, since the adhesion between the coating layer 3 and the protective coating layer 5 is insufficient if the amount of the flocked material is too small or too large, it varies depending on the type of the flocked material, but is 3 to 50 g /
m 2 is desirable. The protective coating layer 5 is preferably vinyl ester, polyester or epoxy containing glass flakes from the necessity of withstanding the severe impact conditions of severe rubble construction, and the thickness of the protective coating layer 5 is preferably 1.5 mm or more.
If the film thickness is thin, the mechanical strength of the protective coating layer 5 will be insufficient during the rubble application, and the anticorrosive coating layer 3 will be greatly damaged. The protective coating layer 5 may be colored in order to maintain its aesthetic appearance as long as it does not lose its function as a protective coating.
【００１１】[0011]
【実施例】以下、実施例により本発明を具体的に説明す
る。表１には実施例−１〜４及び比較例−１〜５の防食
被覆層、植毛材、保護被覆層及び捨石施工試験結果を示
す。実施例−１〜４は、鋼管（８１３ｍｍ×１２ｍｍ×
３ｍ）をグリットブラストにて除錆し、有機系プライマ
ーを塗布後防食被覆層としてポリウレタン樹脂を膜厚
２．０ｍｍにスプレー塗装した。防食被覆層塗装後２〜
５分後の防食被覆層が硬化する前に第１表に示す植毛材
を静電植毛法もしくはエアー吹きつけにて植毛した。そ
の後第１表に示す保護被覆層をそれぞれスプレー塗装し
た。また比較例−１は防食被覆層のポリウレタン樹脂の
みとし、比較例−２は防食被覆層のポリウレタン樹脂を
膜厚７．０ｍｍと厚くした。比較例−３は植毛材のない
場合、比較例−４は植毛材として本発明の範囲より長い
ものを用いた場合、比較例−５は保護被覆層の膜厚を薄
くした場合である。EXAMPLES The present invention will be specifically described below with reference to examples. Table 1 shows the results of the anticorrosion coating layer, the flocked material, the protective coating layer and the rubble application test of Examples-1 to 4 and Comparative Examples-1 to 5. Examples-1 to 4 are steel pipes (813 mm x 12 mm x
3 m) was rust-free by grit blasting, and after applying an organic primer, a polyurethane resin was spray-coated to a film thickness of 2.0 mm as an anticorrosion coating layer. 2 after coating the anticorrosion coating layer
Before the anticorrosive coating layer was cured after 5 minutes, the flocked materials shown in Table 1 were flocked by electrostatic flocking or air blowing. After that, each of the protective coating layers shown in Table 1 was spray coated. In Comparative Example-1, only the polyurethane resin of the anticorrosion coating layer was used, and in Comparative Example-2, the polyurethane resin of the anticorrosion coating layer was thickened to 7.0 mm. Comparative Example-3 is a case where no flocking material is used, Comparative Example-4 is a case where a flocking material longer than the range of the present invention is used, and Comparative Example-5 is a case where the thickness of the protective coating layer is thin.
【００１２】以上のようにして作製した被覆鋼管を横断
面角１２０°で縦割りに切断し、８００ｍｍ×１２ｍｍ
×１２ｍの鋼管矢板に取り付けて捨石施工を行う港湾部
に設置した。尚この時、被覆試験片のほぼ上半分が水面
上に、下半分が水面下になるようにした。以上のように
設置した後、１個平均役１０ｋｇの砕石を水面上より約
４ｍの高さから、３００Ｔｏｎ投下した。The coated steel pipe produced as described above is vertically cut at a cross section angle of 120 °, and 800 mm × 12 mm
It was attached to a steel pipe sheet pile of × 12m and installed in a harbor area where rubble construction is performed. At this time, almost the upper half of the coated test piece was above the water surface and the lower half was below the water surface. After the installation as described above, 300 Ton of crushed stone with an average role of 10 kg was dropped from a height of about 4 m above the water surface.
【００１３】捨石施工後、試験片を取り外し疵状況を調
査した。実施例では疵が１ｍｍ深さ以内の疵であるのに
対し、比較例−１，５ではピンホールが発生する鋼面の
露出疵が発生し、また比較例−２〜４では鋼面の露出疵
はないものの深い疵が発生しており、本発明の効果は顕
著である。After the rubble construction, the test piece was removed and the flaw condition was investigated. In the examples, the flaws are within 1 mm in depth, whereas in Comparative Examples-1 and 5, exposed flaws on the steel surface where pinholes occur are generated, and in Comparative Examples-2 to 4, the exposed steel surface is exposed. Although there are no flaws, deep flaws occur, and the effect of the present invention is remarkable.
【００１４】[0014]
【表１】 [Table 1]
【００１５】[0015]
【表２】 [Table 2]
【００１６】[0016]
【発明の効果】本発明により、防食被覆層３と保護被覆
層５との間に充分な密着力を有しかつ、保護被覆層５に
充分な耐衝撃性を保持した被膜が吹き付けにより被覆可
能となり、鋼管矢板のような複雑な形状にも適用するこ
とができかつ鋼管矢板の施工後に実施する捨石施工に対
し充分な耐衝撃性を保有する重防食被覆鋼管矢板を得る
ことができる。According to the present invention, a coating having sufficient adhesion between the anticorrosion coating layer 3 and the protective coating layer 5 and having sufficient impact resistance can be coated on the protective coating layer 5 by spraying. Therefore, it is possible to obtain a heavy-corrosion-coated steel pipe sheet pile that can be applied to a complicated shape such as a steel pipe sheet pile and that has a sufficient impact resistance against the rubble work performed after the construction of the steel pipe sheet pile.
【図１】本発明の捨石施工用高強度重防食被覆鋼管矢板
の被覆構成図。FIG. 1 is a coating configuration diagram of a high-strength heavy-corrosion-coated steel pipe sheet pile for construction of rubble stones of the present invention.
１…鋼管矢板 ２…下地処理層 ３…防食被覆層 ４…植毛材 ５…保護被覆層 1 ... Steel pipe sheet pile 2 ... Undercoating layer 3 ... Corrosion-proof coating layer 4 ... Flocking material 5 ... Protective coating layer
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ１６Ｌ 58/04 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI technical display area F16L 58/04
Claims (1)
マーの下地処理層、膜厚２ｍｍ以上のポリウレタン樹脂
の防食被覆層、膜厚１．５ｍｍ以上のガラスフレーク入
りのビニルエステル、ポリエステルもしくはエポキシの
保護被覆層が順次形成され、且つ防食被覆層と保護被覆
層との界面に長さが１ｍｍ以上５ｍｍ以下の有機系繊維
もしくは無機系繊維の植毛材が介在されていることを特
徴とする捨石施工用高強度重防食被覆鋼管矢板。1. A primer-treated layer of an organic primer, a corrosion-resistant coating layer of a polyurethane resin having a thickness of 2 mm or more, and a vinyl ester, polyester or epoxy containing glass flakes having a thickness of 1.5 mm or more on a steel pipe sheet pile that has been subjected to rust removal treatment. Protective coating layer is sequentially formed, and a flocked material of organic fiber or inorganic fiber having a length of 1 mm or more and 5 mm or less is interposed at the interface between the anticorrosion coating layer and the protective coating layer. High strength heavy anticorrosion coated steel pipe sheet pile for construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27432692A JPH06122173A (en) | 1992-10-13 | 1992-10-13 | High strength highly corrosion protective steel pipe sheet pile for riprap execution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27432692A JPH06122173A (en) | 1992-10-13 | 1992-10-13 | High strength highly corrosion protective steel pipe sheet pile for riprap execution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06122173A true JPH06122173A (en) | 1994-05-06 |
Family
ID=17540102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27432692A Pending JPH06122173A (en) | 1992-10-13 | 1992-10-13 | High strength highly corrosion protective steel pipe sheet pile for riprap execution |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06122173A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112831246A (en) * | 2021-01-05 | 2021-05-25 | 中国神华能源股份有限公司国华电力分公司 | Coal-fired power plant flue corrosion prevention material and coal-fired power plant flue corrosion prevention method |
-
1992
- 1992-10-13 JP JP27432692A patent/JPH06122173A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112831246A (en) * | 2021-01-05 | 2021-05-25 | 中国神华能源股份有限公司国华电力分公司 | Coal-fired power plant flue corrosion prevention material and coal-fired power plant flue corrosion prevention method |
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