JP2011064020A - Steel sheet pile and steel sheet pile continuous wall - Google Patents
Steel sheet pile and steel sheet pile continuous wall Download PDFInfo
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- JP2011064020A JP2011064020A JP2009216400A JP2009216400A JP2011064020A JP 2011064020 A JP2011064020 A JP 2011064020A JP 2009216400 A JP2009216400 A JP 2009216400A JP 2009216400 A JP2009216400 A JP 2009216400A JP 2011064020 A JP2011064020 A JP 2011064020A
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- 239000010959 steel Substances 0.000 title claims abstract description 120
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- 210000000078 claw Anatomy 0.000 description 4
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- 229910052582 BN Inorganic materials 0.000 description 2
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- 239000011247 coating layer Substances 0.000 description 2
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- 229920006311 Urethane elastomer Polymers 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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Abstract
Description
本発明は、鋼矢板および鋼矢板連続壁に関し、特に電食が懸念される河川の堤防を補強する際に用いて好適なものに関する。 TECHNICAL FIELD The present invention relates to a steel sheet pile and a steel sheet pile continuous wall, and particularly relates to a steel sheet pile suitable for use in reinforcing a river dike where electric corrosion is a concern.
河川堤防は、後背地を河川の増水から守る機能を有しており、保持している機能以上に増水した場合、河川は氾濫し、後背地に甚大な被害を及ぼす。それゆえ、河川堤防はその機能維持のために、侵食、基盤漏水、地震などにたいして安全性を保有することが求められる。 The river embankment has a function to protect the hinterland from the increase of the river, and if the water increases more than the function it retains, the river will flood and cause serious damage to the hinterland. Therefore, river dikes are required to maintain safety against erosion, base water leakage, earthquakes, etc. in order to maintain their functions.
河川堤防および護岸の侵食被害として最も顕著なものは、基礎工前面の河床洗掘を伴って基礎工および法覆工が被災を受ける場合である。洗掘は、洪水時の流量の増加に応じて河床高が低下する現象で、要因としては川幅の変化、水路の湾曲、蛇行および砂州の発生などがあげられる。 The most prominent erosion damage on river dikes and revetments is when the foundation and law lining are damaged by the riverbed scouring in front of the foundation. Scouring is a phenomenon in which the riverbed height decreases as the flow rate increases during flooding. The causes include changes in river width, bends in waterways, meandering, and the occurrence of sandbars.
このような侵食被害の対策として、護岸基礎に鋼矢板を用いると、前面の河床洗掘が当初設定した最深河床高まで下がった場合でも、自立式構造の護岸として堤防侵食を保護できる。 As a countermeasure against such erosion damage, when steel sheet piles are used for the revetment foundation, even when the riverbed scouring on the front surface is lowered to the deepest riverbed height that was initially set, the levee erosion can be protected as a self-supporting structure.
基盤漏水とは、堤防直下に透水性の高い砂層またはレキ層がある場合、洪水時に浸透水が透水層を通り、堤内側法尻付近の抵抗の最も小さい場所を破って漏水が発生する現象である。 Basewater leakage is a phenomenon in which when there is a highly permeable sand layer or reki layer directly under a levee, the infiltrated water passes through the permeable layer during a flood and breaks through the place with the lowest resistance near the inner edge of the levee. is there.
漏水が発生すると法尻の崩れが始まり、それが拡大することにより堤防の崩壊が進み、水圧に耐えられない状態になると破堤にまで至る。このような基盤漏水の対策として、鋼矢板を不透水層１ｍ下まで打設し、止水壁を築造することで被害を防げる。 When water leaks, the hail begins to collapse, and when it expands, the embankment collapses, and when it becomes unable to withstand water pressure, it reaches the levee. As measures against such base water leakage, steel sheet piles can be placed up to 1m below the impermeable layer and a water barrier can be built to prevent damage.
液状化する地盤上にある河川堤防は、大規模地震が発生した際には沈下することが懸念されている。このような液状化対策としては、法肩に鋼矢板を打設する手法と法尻に鋼矢板を打設する手法が挙げられる。 There is a concern that river embankments on liquefied ground will sink when a large-scale earthquake occurs. Such liquefaction countermeasures include a method of placing a steel sheet pile on the shoulder and a method of placing a steel sheet pile on the butt.
前者の法肩タイプは、河川堤防の天端部の法肩に、それぞれ鋼矢板を打設し、タイロッド等で締め付けて二重鋼矢板締切とした鋼矢板芯壁堤を築造するものである。この構造は、洪水に対しても、液状化による地盤沈下発生に対しても堤防の高さを保持できることが特徴である。 In the former shoulder type, steel sheet pile core walls are built by placing steel sheet piles on the shoulders at the top of the river embankment and tightening them with tie rods. This structure is characterized by the ability to maintain the height of the dike against floods and land subsidence due to liquefaction.
後者の法尻タイプは、河川堤防の法尻に鋼矢板を打設し、盛土地盤もしくは盛土直下の地盤の側方流動を小さくし、不等沈下を防止する手法である。 The latter method is a method to prevent uneven settlement by placing steel sheet piles on the river levee to reduce the lateral flow of the embankment or directly under the embankment.
このように、河川堤防の機能維持のためには、堤防土中への鋼矢板の圧入による連続壁の築工は極めて有効な手段であり、種々の鋼矢板が開発提案されている。 Thus, in order to maintain the function of the river dike, the construction of a continuous wall by pressing a steel sheet pile into the dike soil is an extremely effective means, and various steel sheet piles have been developed and proposed.
例えば、図５は、ハット形鋼矢板１の断面形状の一例を示す図で、フランジ１２の外側先端部は突条部１３と爪部１４を有する嵌合部で、ウェブ１１から左右フランジ１２の先端部までで略ハット形状を成している。
For example, FIG. 5 is a diagram illustrating an example of a cross-sectional shape of the hat-shaped steel sheet pile 1, and the outer front end portion of the
鋼矢板は、耐食性向上のために、表面に各種の塗装や重防食処理が施されることが一般的である。また、塗装に代えて、鋼矢板の表面に、耐食性金属層やセラミックス層を形成することも提案されている。 Steel sheet piles are generally subjected to various coatings and heavy anticorrosion treatment on the surface in order to improve corrosion resistance. It has also been proposed to form a corrosion-resistant metal layer or ceramic layer on the surface of the steel sheet pile instead of painting.
特許文献１は、強度や耐久性に加えて美的特性を備えた美化装鋼矢板に関し、鋼矢板の少なくとも片面の一部が、セラミックスで被覆されており、このセラミックス被覆層は溶射により形成され素地に緊密強固に付着している。 Patent Document 1 relates to a beautified steel sheet pile having aesthetic characteristics in addition to strength and durability, and at least a part of one surface of the steel sheet pile is coated with ceramics, and the ceramic coating layer is formed by thermal spraying. It adheres tightly and firmly.
セラミックスの特徴として、長期間にわたって腐食しない、紫外線によって劣化しない、耐摩耗性、傷のつきにくさが挙げられ、衝撃に対して強いものも開発されていることが記載されている。そして、特許文献１では、セラミックスの被覆部位として、ウェブ部とフランジ部及び継ぎ手部の一部で母材金属がセラミックス層で被覆されている例が開示されている。 The characteristics of ceramics include that they do not corrode for a long period of time, are not deteriorated by ultraviolet rays, wear resistance, and are not easily scratched. Patent Document 1 discloses an example in which a base metal is covered with a ceramic layer at a part of a web portion, a flange portion, and a joint portion as a ceramic covering portion.
特許文献２は、美化装鋼矢板に関し、悪環境下で使用するものとして、鋼矢板の少なくとも片面の一部を耐食性金属層またはセラミックスで被覆し、強度や耐久性に加えて美的特性をも備えた鋼矢板が記載されている。
そして、被覆部位が、「赤錆の発生によって美観を損なう部分」、たとえば、「人目に触れる部分」を対象とし、実施例では、耐食性金属層が、「鋼矢板母材に緊密に付着し、ウェブとフランジ及び継ぎ手部の外側表面を被覆している」例が開示されている。 And the covering part is intended for “parts that lose aesthetics due to the occurrence of red rust”, for example, “parts that are touched by human eyes”. In the embodiment, the corrosion-resistant metal layer is adhered to the steel sheet pile base material closely, And the outer surface of the flange and the joint are covered.
特許文献３は、継ぎ手部防食性に優れた塗装鋼矢板に関し、防食を必要とする側の面及び継ぎ手部の嵌合面が、鋼矢板表面に化成処理層あるいはジンクリッチプライマー層を形成し、その上にエポキシ樹脂層を主成分とする防食塗装層を５０〜６００μｍの厚みで積層したことを特徴とする。
鋼矢板爪の嵌合部については打設時に爪同士が接触するため数ｍｍに及ぶ厚膜の重防食被覆を行うことができないところ、防食膜を嵌合面まで形成することにより、継ぎ手嵌合面における被覆端面からの剥離進展を抑制する。 As for the fitting part of the steel sheet pile claw, since the claws come into contact with each other at the time of placing, thick anti-corrosion coating of several millimeters cannot be performed. Suppression of peeling from the coating end face on the surface is suppressed.
ところで、堤防土中へ鋼矢板を圧入した場合、鋼矢板本体の長期耐久性が要求され、その場合、電食対策が必要とされる。通常、土壌抵抗が十分に高い場合には、土中における腐食は１ｍｍ／１００年程度であることが知られており、腐食代設計で十分対応できる。 By the way, when a steel sheet pile is press-fitted into the levee soil, long-term durability of the steel sheet pile main body is required, and in that case, countermeasures against electrolytic corrosion are required. Usually, when the soil resistance is sufficiently high, it is known that the corrosion in the soil is about 1 mm / 100 years, and the corrosion allowance design can sufficiently cope with it.
しかしながら、都市部では、電車や工場等から漏れ出す迷走電流によって鋼材が電食を起こす可能性があり、その場合には、鋼矢板に流入した迷走電流が鋼矢板から流れ出す部位において、大きく腐食する。 However, in urban areas, stray currents leaking from trains, factories, etc. may cause steel corrosion, and in that case, the stray current that flows into the steel sheet piles is greatly corroded at the part that flows out of the steel sheet piles. .
土中の鋼材の電食を防ぐ既存技術としては、塗装と電気防食が挙げられるが、鋼矢板の表面に塗装する場合は両面塗装する必要があり高コストであるばかりでなく、継ぎ手部近傍の形状が複雑であるため全面の塗装は困難である。 The existing technologies for preventing electric corrosion of steel in the soil include painting and anti-corrosion, but when painting on the surface of steel sheet piles, it is necessary to apply double-sided coating, which is not only expensive, but also near the joints. Since the shape is complicated, it is difficult to paint the entire surface.
また、土中に圧入する際、塗膜に鋼面に達する傷が発生する可能性があり、その場合そこを基点として腐食が進行する可能性があるだけでなく、傷部から流入した迷走電流が継ぎ手部を伝わって鋼矢板連続壁を流れ、被覆の施されていない金属面から流出して、連続壁の広い範囲で電食を起こす可能性がある。 In addition, when press-fitting into the soil, scratches that reach the steel surface may occur in the coating film, in which case not only corrosion may progress from that point but also stray current flowing from the scratched part May flow along the steel sheet pile continuous wall through the joint, flow out of the uncoated metal surface, and cause electrolytic corrosion over a wide area of the continuous wall.
一方、電気防食は電食を防ぐ有効な手段であるが、鋼矢板連続壁の場合は表面積が大きいため莫大な電流量が必要であり、流電陽極を用いた場合には取り替えコストが、外部電源方式を用いた場合には設備コストが高額になる。 On the other hand, galvanic protection is an effective means to prevent galvanic corrosion. However, a steel sheet pile continuous wall requires a large amount of current because of its large surface area. When the power supply method is used, the equipment cost becomes high.
なお、特許文献１，２には、鋼矢壁の電食現象に関しての記載は一切なく、開示されている鋼矢板も、例えば、特許文献１の実施例４に係る鋼矢板では、片面の全てがセラミックス層に覆われるわけではなく、護岸に用いられることを予想して最低水面のやや下方より上部のみをセラミックス層で被覆している。
In addition, in
また、特許文献３記載の発明に係る塗装鋼矢板は、隣接鋼矢板との電気的絶縁を確保して、迷走電流の伝播を抑制するものでなく、図示されている嵌合部は、全て、隣接鋼矢板同士が被覆層を介さずに直接接触している。
In addition, the coated steel sheet pile according to the invention described in
そこで、本発明は、上記課題を解決する鋼矢板および当該鋼矢板を用いた連続壁を提供することを目的とする。 Then, an object of this invention is to provide the continuous wall using the steel sheet pile which solves the said subject, and the said steel sheet pile.
本発明の課題は以下の手段で達成可能である。
１．外側両端に継ぎ手部を有する鋼矢板であって、前記継ぎ手部の少なくとも一方の継ぎ手部の嵌合面に電気的絶縁層を備えていることを特徴とする鋼矢板。
２．継ぎ手部以外の鋼矢板表面の一部または全面が電気的絶縁層で覆われていることを特徴とする１記載の鋼矢板。
３．１または２に記載の鋼矢板を土中に圧入して形成される鋼矢板連続壁。
The object of the present invention can be achieved by the following means.
1. A steel sheet pile having joint portions at both outer ends, wherein an electrically insulating layer is provided on a fitting surface of at least one joint portion of the joint portion.
2. 2. The steel sheet pile according to 1, wherein a part or the entire surface of the steel sheet pile other than the joint portion is covered with an electrically insulating layer.
A steel sheet pile continuous wall formed by press-fitting the steel sheet pile according to 3.1 or 2 into the soil.
本発明によれば、迷走電流が流れる都市部においても耐電食性に優れる鋼矢板が得られ、河川堤防の機能を長期間維持することが可能で産業上極めて有用である。 According to the present invention, a steel sheet pile having excellent electric corrosion resistance can be obtained even in an urban area where a stray current flows, and the function of a river bank can be maintained for a long period of time, which is extremely useful industrially.
本発明は、鋼矢板両端の継ぎ手部のうち、少なくとも片方の継ぎ手部の嵌合面を、電気的絶縁層で被覆することを特徴とする。以下、鋼矢板としてハット形鋼矢板を例とし、図を参照しつつ本発明を詳細に説明する。 The present invention is characterized in that, among the joint portions at both ends of the steel sheet pile, at least one of the joint portions is covered with an electrically insulating layer. Hereinafter, the present invention will be described in detail with reference to the drawings, taking a hat-shaped steel sheet pile as an example of the steel sheet pile.
図１は本発明を説明するためのハット形鋼矢板の断面形状を示し、鋼矢板連続壁において左右両端部に隣接するハット形鋼矢板と継ぎ手を形成するように、雄継ぎ手２と雌継ぎ手３を備える。図示したものは鋼矢板本体１の片面が樹脂４で被覆されているが、被覆されていないものであっても本発明の適用は可能である。図２は、雄継ぎ手２が樹脂４で被覆されている場合の一例を示すが、図1に示すように、雄継ぎ手２の樹脂４による被覆は省略してもよい。
FIG. 1 shows a cross-sectional shape of a hat-shaped steel sheet pile for explaining the present invention, and a
本発明は、隣接するハット形鋼矢板と継ぎ手を形成する際、電気的絶縁状態が得られるように雄継ぎ手２（または雌継ぎ手３）が、隣接する鋼矢板の雌継ぎ手（または雄継ぎ手）と嵌合する面（以下、嵌合面）を電気的絶縁層で被覆する。図３に、雄継ぎ手２の嵌合面に電気的絶縁層５を設けた状態を示す。
In the present invention, when forming a joint with an adjacent hat-shaped steel sheet pile, the male joint 2 (or female joint 3) is connected to the female joint (or male joint) of the adjacent steel sheet pile so that an electrically insulated state is obtained. A surface to be fitted (hereinafter referred to as a fitting surface) is covered with an electrically insulating layer. FIG. 3 shows a state where the electrical insulating
本発明において、雄継ぎ手２（または雌継ぎ手３）の嵌合面とは、該鋼矢板が隣接する鋼矢板と嵌合して設置された際に、該隣接する鋼矢板の雌継ぎ手（または雄継ぎ手）と対向する面で、すなわち、嵌合状態によっては隣接する鋼矢板とその一部が接触して電気的導通を生じうる面を指す。 In the present invention, the fitting surface of the male joint 2 (or female joint 3) is the female joint (or male joint) of the adjacent steel sheet pile when the steel sheet pile is fitted and installed with the adjacent steel sheet pile. The surface facing the joint), that is, the surface on which an adjacent steel sheet pile and a part thereof are in contact with each other depending on the fitted state, can cause electrical conduction.
例えば、爪の先端部や屈曲部の外側のように略凸状の部分の外表面は嵌合面であり、また、このほか、嵌合時にこれら略凸状の部分と対向する略凹状の部分の内表面も嵌合面の一例である。 For example, the outer surface of the substantially convex portion such as the outside of the tip or the bent portion of the nail is a fitting surface, and in addition, the substantially concave portion that faces the substantially convex portion during fitting. The inner surface is also an example of a fitting surface.
鋼矢板の継ぎ手部には、施工性を考慮してある程度の遊び（空間）が存在するため、継ぎ手部の嵌合面で、隣接する鋼矢板の継ぎ手部との接触箇所は一義的には決まらない。 Since there is some play (space) in the steel sheet pile joints in consideration of workability, the contact point between the joint parts of the adjacent steel sheet piles is not uniquely determined on the fitting surface of the joint part. Absent.
鋼矢板の継ぎ手部のうち嵌合面に電気的絶縁層を備えることにより、打設時において隣接する鋼矢板の継ぎ手部との嵌合状態がどうであっても、該隣接する鋼矢板との継ぎ手部において電気的絶縁状態を確保し、隣接する鋼矢板相互での通電を防止して、迷走電流の伝播を回避する。 By providing an electrically insulating layer on the fitting surface of the joint portion of the steel sheet pile, no matter what the fitting state with the joint portion of the adjacent steel sheet pile at the time of placing, An electrical insulation state is ensured in the joint portion, and energization between adjacent steel sheet piles is prevented, and propagation of stray current is avoided.
図３では樹脂４と電気的絶縁層５はコーナ部において不連続部を有するが、樹脂４として後述する電気的絶縁特性を備えた素材を用い、鋼矢板の片面を雄継ぎ手２（または雌継ぎ手３）の嵌合面から雌継ぎ手３（または雄継ぎ手２）の嵌合面まで不連続部を設けずに被覆してもよい。
In FIG. 3, the
図４に嵌合面に電気的絶縁層５を積層した雄継ぎ手２と、隣接する鋼矢板の雌継ぎ手３との嵌合状態を示す。雄継ぎ手２と雌継ぎ手３は電気的絶縁層５を介して嵌合し、それぞれの母材部は直接接触しないため隣接する鋼矢板間での電気的絶縁状態が達成される。
FIG. 4 shows a fitting state between the male joint 2 in which the electrical insulating
本発明によれば、仮に迷走電流が任意の鋼矢板に流入した場合でも、その迷走電流は継ぎ手部嵌合面を被覆する電気的絶縁層で遮断されるため、隣接した鋼矢板に流入せず、その結果、電食の被害を局部的な範囲に抑えることが可能である。 According to the present invention, even if a stray current flows into an arbitrary steel sheet pile, the stray current is interrupted by the electrical insulating layer covering the joint portion fitting surface, so that it does not flow into the adjacent steel sheet pile. As a result, it is possible to limit the damage of electric corrosion to a local range.
電食を防ぐためには、隣接する鋼矢板間の継ぎ手部において、電気的絶縁層５は一方の鋼矢板の雄継ぎ手２または他方の鋼矢板の雌継ぎ手３のいずれかの嵌合面に積層されていればよいので、一枚の鋼矢板における雄継ぎ手２または雌継ぎ手３のいずれかの嵌合面に電気的絶縁層５が積層されていれば良い。但し、鋼矢板の両端の継ぎ手部の嵌合面を電気的絶縁層で被覆すると、打設の際、隣接する鋼矢板の電気的絶縁層が損傷しても電気的絶縁が維持されて好ましい。
In order to prevent galvanic corrosion, the electrical insulating
また、継ぎ手部嵌合面を電気的絶縁層５で被覆するとともに、図１に示すようにウェブからフランジ先端の腕部までの鋼矢板本体１の片面を電気的絶縁層である樹脂４で被覆した鋼矢板は、継ぎ手部嵌合面のみを電気的絶縁層５で被覆した鋼矢板と比較すると迷走電流が鋼矢板に流入する確率が低減して好ましい。更に、鋼矢板の長手方向端面のうち、特に土中に埋設される側の端面に電気的絶縁層を設けておくと、土中への圧入後に、この端面からの迷走電流の流入を抑制することができる。
Further, the joint portion fitting surface is covered with an electrically insulating
本発明では、電気的絶縁層を形成する材質は鋼矢板の打ち込みの際に損傷が生じず、且つ耐久性に優れるものであれば良く、特に規定しない。絶縁層の種類としては、長期の耐久性や嵌合時および土中への圧入時の耐摩耗性の観点からセラミックス（導電性セラミックスを除く）が好ましく、より具体的には、チタニア、アルミナ、ジルコニア、炭化珪素、窒化珪素、窒化ホウ素等の単体あるいは混合物から成ることが好ましい。 In the present invention, the material for forming the electrical insulating layer is not particularly limited as long as it does not cause damage when the steel sheet pile is driven and is excellent in durability. As the type of the insulating layer, ceramics (excluding conductive ceramics) are preferable from the viewpoint of long-term durability and wear resistance during fitting and press-fitting into the soil, and more specifically, titania, alumina, It is preferably made of a simple substance or a mixture of zirconia, silicon carbide, silicon nitride, boron nitride or the like.
継ぎ手部嵌合面へのセラミックスの被覆・積層方法としては、溶射が挙げられる。また、溶射層の密着強度を高めるために、継ぎ手部嵌合面に予めブラスト処理を施して鋼材表面の汚れ、スケール、錆等を除去しても構わない。 Thermal spraying is an example of a method for coating and laminating ceramics on the joint portion fitting surface. Further, in order to increase the adhesion strength of the sprayed layer, the joint portion fitting surface may be pre-blasted to remove dirt, scale, rust, etc. on the steel material surface.
電気的絶縁層の膜厚は特に制限しないが、代表的な膜厚としては、５０μｍ〜５ｍｍ程度が挙げられる。５０μｍを大きく下回る場合には膜の欠陥や膜厚のばらつきに由来する不完全な電気的絶縁層が形成される可能性があるため好ましくなく、また、５ｍｍを大きく超える場合にはコスト的に高くつくだけでなく、鋼矢板同士の嵌合に支障が出る可能性があるため、好ましくない。 The thickness of the electrical insulating layer is not particularly limited, but a typical thickness is about 50 μm to 5 mm. If it is significantly less than 50 μm, an incomplete electrical insulating layer may be formed due to film defects or film thickness variations, and if it exceeds 5 mm, it is not preferable. This is not preferable because it may interfere with the fitting between the steel sheet piles.
また、鋼矢板表面に適用する樹脂の種類は特に限定しないが、土中への圧入時におこる土壌との摩擦に耐えられることが好ましく、例えば鋼矢板の重防食に用いられるポリエチレン被覆やウレタンエラストマー被覆が挙げられる。また、この樹脂被覆は、鋼矢板の片面あるいは両面のいずれでも構わない。 In addition, the type of resin applied to the steel sheet pile surface is not particularly limited, but it is preferable to withstand friction with the soil that occurs during press-fitting into the soil. For example, polyethylene coating or urethane elastomer coating used for heavy corrosion protection of steel sheet piles Is mentioned. Further, this resin coating may be on one side or both sides of the steel sheet pile.
なお、樹脂被膜に換えて、嵌合部の電気的絶縁層を形成するセラミックスを用いることは何等差し支えない。溶射して形成することが好ましく、セラミックスとして、導電性のものを除いた、チタニア、アルミナ、ジルコニア、炭化珪素、窒化珪素、窒化ホウ素の１種または２種以上が利用できる。 In place of the resin coating, it is possible to use ceramics that form the electrically insulating layer of the fitting portion. The ceramic is preferably formed by thermal spraying. As the ceramic, one or more of titania, alumina, zirconia, silicon carbide, silicon nitride, and boron nitride, excluding the conductive ones, can be used.
本発明が対象とする鋼矢板は、所謂Ｕ形鋼矢板、ハット形鋼矢板、Ｚ形鋼矢板あるいは直線鋼矢板等、いずれの形状でも良く、とくに限定せず、それらの材質も特に限定するものではないが、代表例として、ＪＩＳ Ａ５５２３記載のＳＹＷ２９５、ＳＹＷ３９５あるいはＪＩＳ Ａ５５２８記載のＳＹ２９５、ＳＹ３９５等が挙げられる。また、本発明は、上述した鋼矢板を用いた鋼矢板連続壁である。 The steel sheet pile targeted by the present invention may be any shape such as a so-called U-shaped steel sheet pile, hat-shaped steel sheet pile, Z-shaped steel sheet pile or straight steel sheet pile, and is not particularly limited. However, representative examples include SYW295 and SYW395 described in JIS A5523, SY295 and SY395 described in JIS A5528, and the like. Moreover, this invention is the steel sheet pile continuous wall using the steel sheet pile mentioned above.
１ ハット形鋼矢板（鋼矢板本体）
２ 雄継ぎ手
３ 雌継ぎ手
４ 樹脂
５ 電気的絶縁層
１１ ウェブ
１２ フランジ
１３ 突条部
１４ 爪部
1 Hat-shaped steel sheet pile (steel sheet pile body)
2 Male joint 3 Female joint 4
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6085921A (en) * | 1983-10-19 | 1985-05-15 | Nippon Steel Corp | Coating method of steel sheet pile |
| JPS615921A (en) * | 1984-06-21 | 1986-01-11 | Nippon Steel Corp | Coated steel sheet pile of corrosion resistance and manufacture thereof |
| JPH02121837A (en) * | 1988-10-31 | 1990-05-09 | Nkk Corp | Manufacture of plastic-coated steel sheet-pile |
| JPH02232415A (en) * | 1989-03-06 | 1990-09-14 | Nkk Corp | Decorated steel sheet pile |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6085921A (en) * | 1983-10-19 | 1985-05-15 | Nippon Steel Corp | Coating method of steel sheet pile |
| JPS615921A (en) * | 1984-06-21 | 1986-01-11 | Nippon Steel Corp | Coated steel sheet pile of corrosion resistance and manufacture thereof |
| JPH02121837A (en) * | 1988-10-31 | 1990-05-09 | Nkk Corp | Manufacture of plastic-coated steel sheet-pile |
| JPH02232415A (en) * | 1989-03-06 | 1990-09-14 | Nkk Corp | Decorated steel sheet pile |
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