JP5655431B2 - Steel sheet pile structure, steel sheet pile - Google Patents
Steel sheet pile structure, steel sheet pile Download PDFInfo
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- JP5655431B2 JP5655431B2 JP2010190216A JP2010190216A JP5655431B2 JP 5655431 B2 JP5655431 B2 JP 5655431B2 JP 2010190216 A JP2010190216 A JP 2010190216A JP 2010190216 A JP2010190216 A JP 2010190216A JP 5655431 B2 JP5655431 B2 JP 5655431B2
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- 229910000831 Steel Inorganic materials 0.000 title claims description 143
- 239000010959 steel Substances 0.000 title claims description 143
- 238000000576 coating method Methods 0.000 claims description 45
- 239000011248 coating agent Substances 0.000 claims description 43
- 238000005260 corrosion Methods 0.000 claims description 20
- 238000003780 insertion Methods 0.000 claims description 18
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- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
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- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
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- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 229920006311 Urethane elastomer Polymers 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000002436 steel type Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
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- 238000005098 hot rolling Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000011527 polyurethane coating Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
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- 229910052720 vanadium Inorganic materials 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Description
本発明は、河川や海洋などの厳しい腐食環境で使用される鋼矢板構造物及び該鋼矢板構造物を形成する鋼矢板に関する。 The present invention relates to a steel sheet pile structure used in severe corrosive environments such as rivers and oceans, and a steel sheet pile forming the steel sheet pile structure.
海洋などの厳しい腐食環境にさらされる港湾鋼構造物の部材としてポリウレタンやポリエチレンなどの重防食被覆を施した鋼矢板が用いられている。
重防食被覆鋼矢板は主にＵ形鋼矢板が用いられてきたが、近年幅広で工期短縮が可能なハット形鋼矢板についても重防食被覆が検討されている。
また、鋼矢板には断面がＺ形状のものがあり、今後海外を中心に使用が増えることが考えられているが、その防食方法についてはほとんど検討されていない。
Steel sheet piles with heavy anti-corrosion coatings such as polyurethane and polyethylene are used as members of harbor steel structures exposed to severe corrosive environments such as the ocean.
Although U-shaped steel sheet piles have been mainly used as the heavy-duty-coated steel sheet piles, heavy-duty anti-corrosion coatings have also been studied for hat-shaped steel sheet piles that are wide and capable of shortening the work period.
Further, some steel sheet piles have a Z-shaped cross section, and it is considered that the use will increase mainly overseas, but the anticorrosion method has hardly been studied.
鋼矢板への重防食被覆は飛沫、干満部に晒される表面に工場などで施されるが、継手近傍は重防食被覆が行われない。重防食被覆鋼矢板の腐食はこの継手近傍にある被覆端部から被覆剥離をともなって発生する。この被覆端部の剥離を抑制することで重防食被覆鋼矢板の腐食は大幅に抑制されるため、この被覆端部からの剥離抑制のための検討がいくつかなされてきた。 A heavy anticorrosion coating on steel sheet piles is applied to the surface exposed to splashes and tidal parts at a factory or the like, but a heavy anticorrosion coating is not performed near the joint. Corrosion of the heavy anticorrosion coated steel sheet pile occurs with the peeling of the coating from the coated end near the joint. Since the corrosion of the heavy anticorrosion coated steel sheet pile is greatly suppressed by suppressing the peeling of the coated end, some studies have been made to suppress the peeling from the coated end.
例えば、特許文献１ではボルトとナットにより継手部をカバーで覆い、その中に充填材を充填する方法が提案されている。
また、特許文献２では継手部にあらかじめフック金具を固定して、そこにカバーを取り付けその中に充填材を充填する方法が提案されている。
また、特許文献３では継手部にそってべースプレートを固定し、そのベースプレートとカバーをスポット溶接し、その中に充填材を充填する方法が提案されている。
また、特許文献４では継手部にあらかじめＬ型金具を固定しておき、そこにカバーをとりつけ、継手部とカバー間に充填材を充填する方法が提案されている。
For example, Patent Document 1 proposes a method in which a joint portion is covered with a cover with bolts and nuts, and a filler is filled therein.
Patent Document 2 proposes a method in which a hook metal fitting is fixed to a joint portion in advance, a cover is attached thereto, and a filler is filled therein.
Patent Document 3 proposes a method in which a base plate is fixed along a joint portion, the base plate and a cover are spot welded, and a filler is filled therein.
Patent Document 4 proposes a method in which an L-shaped bracket is fixed to a joint portion in advance, a cover is attached thereto, and a filler is filled between the joint portion and the cover.
特許文献１乃至４に開示されたものは、継手部にカバーを設置する点で共通しており、そのカバーの固定方法がそれぞれ異なっている。特許文献１はボルトとナットで固定するものであり、特許文献２はフック金具を用いて固定するものであり、特許文献３は予め固定したベースプレートにスポット溶接で固定するものであり、特許文献４は予め固定したＬ型金具を用いて固定するものである。 Those disclosed in Patent Documents 1 to 4 are common in that a cover is installed at the joint, and the fixing method of the cover is different. Patent Document 1 is fixed with bolts and nuts, Patent Document 2 is fixed with a hook metal fitting, Patent Document 3 is fixed to a previously fixed base plate by spot welding, Patent Document 4 Is fixed using an L-shaped metal fitting fixed in advance.
特許文献１乃至４の方法はいずれもカバー設置の工程が複雑であり、カバー設置に手間がかかるという問題がある。
また、特許文献１乃至４はいずれもハット形鋼矢板に関するものであり、ハット形鋼矢板以外のもの、例えばＺ形鋼矢板については何らの検討もされていない。
In any of the methods of Patent Documents 1 to 4, the cover installation process is complicated, and there is a problem that it takes time to install the cover.
Patent Documents 1 to 4 all relate to hat-shaped steel sheet piles, and nothing is examined about things other than hat-shaped steel sheet piles, for example, Z-shaped steel sheet piles.
本発明はかかる課題を解決するためになされたものであり、カバー設置の工程が単純で施工性に優れると共に防食性にも優れた鋼矢板構造物及び該鋼矢板構造物を形成する鋼矢板を提供することを目的としている。 The present invention has been made in order to solve such problems, and a steel sheet pile structure that has a simple cover installation process and excellent workability and also has excellent corrosion resistance and a steel sheet pile structure that forms the steel sheet pile structure. It is intended to provide.
（１）本発明に係る鋼矢板構造物は、一方の面に重防食被覆が施されると共に両端に継手部を有する鋼矢板を連結して形成される鋼矢板構造物であって、連結された継手部同士の間に形成されて前記重防食被覆が施された面側に溝状に開口する溝状開口部と、該溝状開口部を形成する前記継手部に形成された係止部と、前記溝状開口部に挿入されると共に前記係止部に係止する挿入片部と、隣り合う鋼矢板の前記重防食被覆に跨るように前記継手部の連結部をカバーするカバー部とを有するカバー体とを備えてなることを特徴とするものである。
(1) A steel sheet pile structure according to the present invention is a steel sheet pile structure formed by connecting a steel sheet pile having a joint portion at both ends while being provided with a heavy anticorrosion coating on one surface. A groove-shaped opening formed in a groove shape on the surface side formed between the joint portions and provided with the heavy anticorrosion coating, and a locking portion formed in the joint portion forming the groove-shaped opening If, when inserted into the groove-shaped opening and both the insertion piece portion for locking with the locking portion, the cover covering the connecting portion of the joint portion so as to extend in the heavy duty coating adjacent steel sheet pile section And a cover body having the above.
（２）上記（１）に記載のものにおいて、前記継手部の連結部におけるカバー体と継手部との隙間に充填材を充填したことを特徴とするものである。 (2) In the device according to (1), a filler is filled in a gap between the cover body and the joint portion in the joint portion of the joint portion.
（３）本発明に係る鋼矢板は、一方の面に重防食被覆が施されると共に両端に継手部を有する鋼矢板を連結して形成される鋼矢板構造物であって、連結された継手部同士の間に形成されて前記重防食被覆が施された面側に溝状に開口する溝状開口部と、該溝状開口部に挿入される挿入片部を有し、隣り合う鋼矢板の前記重防食被覆に跨るように前記継手部の連結部をカバーするカバー体とを備えてなる鋼矢板構造物を形成する鋼矢板であって、
前記両端部の継手部の開口の向きを逆向きにすると共に、一方の継手部を開口の幅が他方の継手部の開口の幅よりも大きく設定した大継手部とし、他方の継手部を開口の幅が前記大継手部よりも小さい小継手部とし、前記大継手部に小継手部を連結したときに両者間に溝状開口部が形成されるようにしたことを特徴とするものである。
(3) A steel sheet pile according to the present invention is a steel sheet pile structure formed by connecting a steel sheet pile having a joint portion at both ends with a heavy anticorrosion coating on one surface, and a connected joint Steel sheet piles adjacent to each other having a groove-shaped opening formed in a groove shape on the surface side formed between the portions and provided with the heavy anticorrosion coating, and an insertion piece portion inserted into the groove-shaped opening A steel sheet pile forming a steel sheet pile structure comprising a cover body that covers the coupling portion of the joint portion so as to straddle the heavy anti-corrosion coating ,
The direction of the opening of the joint portion at both ends is reversed, and one joint portion is a large joint portion whose opening width is set larger than the width of the opening of the other joint portion, and the other joint portion is opened. The small joint portion is smaller than the large joint portion, and when the small joint portion is connected to the large joint portion, a groove-shaped opening is formed between the two. .
（４）また、上記（３）に記載のものにおいて、前記鋼矢板は、ウェブと、その両端に形成されたフランジと、各フランジの端部に逆向きに開口する継手部を備えてなるＺ形鋼矢板であることを特徴とするものである。 (4) Moreover, in the above-described (3), the steel sheet pile includes a web, flanges formed at both ends thereof, and a joint portion that opens in the opposite direction at the end of each flange. It is a shape steel sheet pile.
（５）また、上記（３）に記載のものにおいて、前記鋼矢板は断面がハット形のハット形鋼矢板であることを特徴とするものである。 (5) Moreover, in the thing as described in said (3), the said steel sheet pile is a hat-shaped steel sheet pile with a hat-shaped cross section.
（６）また、一方の面に重防食被覆が施されると共に両端に継手部を有する鋼矢板を連結して形成される鋼矢板構造物であって、連結された継手部同士の間に形成されて前記重防食被覆が施された面側に溝状に開口する溝状開口部と、該溝状開口部に挿入される挿入片部を有し、隣り合う鋼矢板の前記重防食被覆に跨るように前記継手部の連結部をカバーするカバー体とを備えてなる鋼矢板構造物を形成する鋼矢板であって、
該鋼矢板は、ウェブと、その両端に形成されたフランジと、各フランジの端部に同じ向きに開口する継手部を備えてなる一対のＺ形鋼矢板であり、
該一対のＺ形鋼矢板の一方は開口の幅が小さい小継手部を両端に備えてなり、開口側と反対側の面に重防食被覆が施され、他方のＺ形鋼矢板は開口の幅が大きい大継手部を両端に備えてなり、開口側の面に重防食被覆が施されていることを特徴とするものである。
(6) Moreover, it is a steel sheet pile structure formed by connecting a steel sheet pile having a joint portion on both ends and having a heavy anti-corrosion coating on one surface, and formed between the connected joint portions. A groove-like opening that opens in the shape of a groove on the surface side where the heavy-duty-proof coating is applied, and an insertion piece that is inserted into the groove-like opening, and the heavy-duty anti-corrosion coating of adjacent steel sheet piles A steel sheet pile that forms a steel sheet pile structure comprising a cover body that covers the coupling portion of the joint portion so as to straddle ,
The steel sheet pile is a pair of Z-shaped steel sheet piles comprising a web, flanges formed at both ends thereof, and joint portions opening in the same direction at the end portions of the respective flanges,
One of the pair of Z-shaped steel sheet piles is provided with a small joint portion having a small opening width at both ends, a heavy anti-corrosion coating is applied to the surface opposite to the opening side, and the other Z-shaped steel sheet pile has an opening width. Large joint portions are provided at both ends, and a heavy anticorrosion coating is provided on the opening side surface.
（７）また、上記（３）乃至（６）のいずれかに記載の鋼矢板であって、重防食被覆がされた面が平坦に形成されていることを特徴とするものである。 (7) Moreover, it is a steel sheet pile as described in any one of said (3) thru | or (6), Comprising: The surface by which heavy anti-corrosion coating was carried out is formed flat.
本発明の鋼矢板構造物においては、隣接する鋼矢板の連結された継手部同士の間に形成されて前記重防食被覆が施された面側に溝状に開口する溝状開口部と、該溝状開口部を形成する前記継手部に形成された係止部と、前記溝状開口部に挿入されると共に前記係止部に係止する挿入片部と、隣り合う鋼矢板の前記重防食被覆に跨るように前記継手部の連結部をカバーするカバー部とを有するカバー体とを備えてなるので、鋼矢板を打設後、溝状開口部にカバー体の挿入片部を挿入するという簡易な処理を施すことによって防食性に優れた鋼矢板構造物を得ることができる。 In steel sheet pile structure of the present invention, a groove-shaped opening which opens into a groove shape is formed the heavy anticorrosive coating is applied the surface side between the concatenated joint portions of the adjacent steel sheet pile, the said joint portion engaging portion formed in forming the groove-shaped opening, the load of the when inserted into the groove-shaped opening and both the locking portions for locking the insertion piece portion, adjacent steel sheet pile Since it has a cover body having a cover portion that covers the coupling portion of the joint portion so as to straddle the anticorrosion coating, after inserting the steel sheet pile, the insertion piece portion of the cover body is inserted into the groove-shaped opening portion The steel sheet pile structure excellent in corrosion resistance can be obtained by performing the simple process of.
［実施の形態１］
以下、本発明の実施の形態を、図面を用いて説明する。
本実施の形態に係る鋼矢板構造物１は、図１、図２に示すように、一方の面に重防食被覆３が施されると共に両端に継手部５を有する鋼矢板７を連結して形成される鋼矢板構造物１であって、隣接する鋼矢板７の連結された継手部５同士の間に形成されて前記重防食被覆３が施された面側に溝状に開口する溝状開口部９と、隣り合う鋼矢板７の前記重防食被覆３に跨るように前記継手部５の連結部をカバーするカバー体１１とを備えてなるものである。
また、連結された継手とカバー体１１との隙間には継手部５の防食のための充填材１３が充填されている（図２参照）。
以下、各構成を詳細に説明する。
[Embodiment 1]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The steel sheet pile structure 1 according to the present embodiment includes a steel sheet pile 7 having a heavy anticorrosion coating 3 on one surface and joint portions 5 at both ends as shown in FIGS. It is the steel sheet pile structure 1 formed, Comprising: The groove shape which is formed between the joint parts 5 with which the adjacent steel sheet piles 7 were connected, and opens in groove shape on the surface side where the said heavy-duty coating 3 was given. An opening 9 and a cover body 11 that covers the connecting portion of the joint portion 5 so as to straddle the heavy anticorrosion coating 3 of the adjacent steel sheet piles 7 are provided.
In addition, a gap between the coupled joint and the cover body 11 is filled with a filler 13 for preventing corrosion of the joint portion 5 (see FIG. 2).
Hereinafter, each configuration will be described in detail.
＜重防食被覆＞
本実施の形態において鋼矢板７に施される重防食被覆３はその種類や形態を特に限定するものではないが、その一例を示すと、腐食環境に晒される表面にポリウレタンやポリエチレンなどの防食樹脂層をポリウレタンやエポキシなどの接着剤層の上に２〜５ｍｍ程度の厚さで被覆したものが挙げられる。
重防食は、例えば海側に配置される面における飛沫、干満帯に相当する部位に施工される。
<Heavy anti-corrosion coating>
In the present embodiment, the heavy anticorrosion coating 3 applied to the steel sheet pile 7 is not particularly limited in its type or form, but an example thereof is an anticorrosion resin such as polyurethane or polyethylene on the surface exposed to the corrosive environment. The layer is coated on an adhesive layer such as polyurethane or epoxy with a thickness of about 2 to 5 mm.
Heavy anticorrosion is applied, for example, to a portion corresponding to splashes and tidal zones on the surface arranged on the sea side.
＜鋼矢板＞
本実施の形態に係る鋼矢板７は、図３に示すように、互いに連結される一対の第１Ｚ形鋼矢板１５と第２Ｚ形鋼矢板１７を備えている。
図３における図中左側の第１Ｚ形鋼矢板１５（図３（ａ）参照）は、断面において、図中右斜めに傾斜するウェブ１９と、該ウェブ１９の図中上側端部に連続して右方向に延出するように形成された上フランジ２１と、ウェブ１９の下側端部に連続して左方向に延出するように形成された下フランジ２３とを備えている。そして、上フランジ２１の端部には小継手部５ａが形成され、下フランジ２３の端部には大継手部５ｂが形成されている。
小継手部５ａは、図４（ａ）に示すように、図中下方に開口する凹溝２９と、凹溝２９の先端側に形成された鉤状部３１と、凹溝２９の基部側に形成された図中下方向に出っ張る凸状部３３を備えている。小継手部５ａにおける開口側と反対の面は平坦になっており、この平坦になった面における小継手部５ａの先端から距離ａ（３０ｍｍ以内程度）を除く部分に重防食被覆３が施されている（図４参照）。
<Steel sheet pile>
As shown in FIG. 3, the steel sheet pile 7 according to the present embodiment includes a pair of first Z-shaped steel sheet piles 15 and second Z-shaped steel sheet piles 17 that are connected to each other.
The first Z-shaped steel sheet pile 15 (see FIG. 3A) on the left side in FIG. 3 is continuous with the web 19 inclined obliquely to the right in the figure and the upper end of the web 19 in the figure in the cross section. An upper flange 21 formed so as to extend rightward and a lower flange 23 formed so as to extend leftward continuously from the lower end portion of the web 19 are provided. A small joint portion 5 a is formed at the end of the upper flange 21, and a large joint portion 5 b is formed at the end of the lower flange 23.
As shown in FIG. 4A, the small joint portion 5 a includes a concave groove 29 that opens downward in the drawing, a hook-shaped portion 31 formed on the distal end side of the concave groove 29, and a base side of the concave groove 29. The formed convex part 33 protrudes in the downward direction in the figure. The surface opposite to the opening side of the small joint portion 5a is flat, and a heavy anti-corrosion coating 3 is applied to a portion excluding the distance a (about 30 mm or less) from the tip of the small joint portion 5a on the flat surface. (See FIG. 4).
大継手部５ｂは、図４（ｂ）に示すように、小継手部５ａよりも幅広で図中上方に開口する凹溝３５と、凹溝３５の先端側の鉤状部３７と、凹溝３５の基端側で凹溝３５側に出っ張る係止片部３９を備えている。大継手部５ｂにおける開口側の面は平坦になっており、この平坦になった面に図４（ｂ）に示すように、フランジ端部から距離ｂ（３０ｍｍ以内程度）を除く部分に重防食被覆３が施されている。 As shown in FIG. 4 (b), the large joint portion 5b has a groove 35 wider than the small joint portion 5a and opened upward in the figure, a flange-like portion 37 on the tip side of the groove 35, and a groove An engagement piece 39 is provided on the base end side of the groove 35 so as to protrude toward the concave groove 35. The surface on the opening side of the large joint portion 5b is flat, and as shown in FIG. 4 (b) on this flat surface, the portion other than the distance b (about 30 mm or less) from the flange end is heavily anticorrosive. A coating 3 is applied.
図３における中右側の第２Ｚ形鋼矢板１７（図３（ｂ）参照）は、断面において、図中左斜めに傾斜するウェブ４１と、該ウェブ４１の図中上側端部に連続して左方向に延出するように形成された上フランジ４３と、ウェブ４１の下側端部に連続して右方向に延出するように形成された下フランジ４５とを備えている。そして、上フランジ４３の端部には大継手部５ｂが形成され、下フランジ４５の端部には小継手部５ａが形成されている。大継手部５ｂと小継手部５ａの形状は第１Ｚ形鋼矢板１５のものと同様である。
また、第２Ｚ形鋼矢板１７は、第１Ｚ形鋼矢板１５と同様に、大継手部５ｂの開口する側の面に重防食が施されている。
本実施の形態の鋼矢板構造物１は、図２に示すように、隣接する第１Ｚ形鋼矢板１５と第２Ｚ形鋼矢板１７における小継手部５ａと大継手部５ｂが連結され、連結状態で溝状に延びる溝状開口部９（図１参照）が形成される。
3, the second Z-shaped steel sheet pile 17 on the right side of the middle (see FIG. 3B) has a web 41 that is inclined obliquely to the left in the drawing and a left side that is continuous with the upper end of the web 41 in the drawing. An upper flange 43 formed so as to extend in the direction and a lower flange 45 formed so as to extend rightward continuously from the lower end portion of the web 41 are provided. A large joint portion 5 b is formed at the end of the upper flange 43, and a small joint portion 5 a is formed at the end of the lower flange 45. The shapes of the large joint portion 5 b and the small joint portion 5 a are the same as those of the first Z-shaped steel sheet pile 15.
Further, the second Z-shaped steel sheet pile 17 is subjected to heavy anticorrosion on the surface of the large joint portion 5b where the large joint portion 5b is opened, like the first Z-shaped steel sheet pile 15.
As shown in FIG. 2, the steel sheet pile structure 1 of the present embodiment is connected to the small joint portion 5 a and the large joint portion 5 b in the adjacent first Z-shaped steel sheet pile 15 and second Z-shaped steel sheet pile 17. Thus, a groove-shaped opening 9 (see FIG. 1) extending in a groove shape is formed.
上記の説明から分かるように、第１Ｚ形鋼矢板１５、第２Ｚ形鋼矢板１７共に、傾斜するウェブと、ウェブの両端に互いに逆方向に延出するように設けられたフランジとを備え、各フランジの先端に互いに逆方向に開口を有する継手部５を備えている点で共通している。 As can be seen from the above description, each of the first Z-shaped steel sheet pile 15 and the second Z-shaped steel sheet pile 17 includes an inclined web, and flanges provided so as to extend in opposite directions at both ends of the web. This is common in that a joint portion 5 having openings in opposite directions is provided at the tip of the flange.
Ｚ形鋼矢板の製造方法は特に限定されるものではないが、その一例を挙げれば鋼スラブや鋼ブルームを熱間加工することにより製造される。なお、継手部形状の加工は冷間加工によってなされてもよい。
また、Ｚ形鋼矢板は、その鋼種について特に限定するものではないが、普通鋼もしくはＣ、Ｓｉ、Ｍｎ、Ｐ、Ｓなどを制御したものや、Ｃｕ、Ｃｒ、Ｎｉ、Ｍｏ、Ｗ、Ｓｎ、Ｎｂ、Ｓｂ，Ｖ、Ａｌ等の元素を添加した合金鋼などを用いることが出来る。
Although the manufacturing method of a Z-shaped steel sheet pile is not specifically limited, If the example is given, it will manufacture by hot-working a steel slab and a steel bloom. The joint portion shape may be processed by cold working.
Further, the Z-shaped steel sheet pile is not particularly limited with respect to its steel type, but it is possible to control ordinary steel or C, Si, Mn, P, S, etc., Cu, Cr, Ni, Mo, W, Sn, An alloy steel to which elements such as Nb, Sb, V, and Al are added can be used.
＜カバー体＞
カバー体１１は、継手部５の連結部をカバーするものであり、その材質は樹脂、ゴムなどの弾性を有するものが好ましい。樹脂としてはポリエチレン樹脂、ポリプロピレン樹脂、ポリ塩化ビニル樹脂などが強度、耐候性を持たせる点で好ましい。ゴムとしてはウレタンゴムやシリコーンゴムなどが強度、耐候性を持たせる点で好ましい。
カバー体１１は、図５に示されるように、溝状開口部９に挿入される挿入片部４７と、隣り合う矢板の重防食被覆３に跨るように継手部５の連結部をカバーするカバー部４９とを備えている。カバー部４９は長手方向に連続する形状であるが、挿入片部４７は所定の長さのものが断続的に連続するように形成されている。
<Cover body>
The cover body 11 covers the connection part of the joint part 5, and the material thereof preferably has elasticity such as resin or rubber. As the resin, polyethylene resin, polypropylene resin, polyvinyl chloride resin and the like are preferable in terms of imparting strength and weather resistance. As the rubber, urethane rubber, silicone rubber and the like are preferable in terms of imparting strength and weather resistance.
As shown in FIG. 5, the cover body 11 covers a connecting portion of the joint portion 5 so as to straddle the insertion piece portion 47 inserted into the groove-shaped opening 9 and the heavy anticorrosion coating 3 of the adjacent sheet pile. Part 49. The cover portion 49 has a shape that is continuous in the longitudinal direction, but the insertion piece portion 47 is formed such that a predetermined length is intermittently continuous.
カバー体１１におけるカバー部４９の幅は、継手部５近傍の被覆のない部分を覆うため、１００〜２００ｍｍ程度に設定するのが好ましい。また、カバー部４９の厚みは強度を持たせるため１〜５ｍｍ程度にするのが好ましい。
挿入片部４７は、図５に示されるように、端部に係止部５１を有している。係止部５１は、図３に示すように、挿入片部４７を溝状開口部９に挿入したときに、大継手の係止片部３９に係止する。なお、挿入片部４７の長さは、使用する鋼矢板７に合わせるものとする。
The width of the cover portion 49 in the cover body 11 is preferably set to about 100 to 200 mm in order to cover the uncovered portion near the joint portion 5. Further, the thickness of the cover portion 49 is preferably about 1 to 5 mm in order to give strength.
The insertion piece part 47 has the latching | locking part 51 in the edge part, as FIG. 5 shows. As shown in FIG. 3, the locking portion 51 is locked to the locking piece portion 39 of the large joint when the insertion piece portion 47 is inserted into the groove-shaped opening 9. In addition, the length of the insertion piece part 47 shall be matched with the steel sheet pile 7 to be used.
カバー体１１におけるカバー部４９は、図５に示すように、断面が上に凸の円弧状になっており、弾性によって円弧が多少開くようになっている。カバー部４９の両端下面の位置から係止部５１の上端面までの距離をｄ、カバー部４９における撓み代（両端下面の位置から挿入片部４７が設けられている中心部の位置の高さ方向の距離）をｅとし（図５参照）、大継手部５ｂにおける重防食被覆３が施された部位の厚みをｃとすると、カバー部４９におけるｄ及びｅを、ｄ＜ｃ＜ｅとなるように設定するのが好ましい。このように設定することで、カバー部４９がその弾性により重防食被覆表面に密着し、効率よく充填材１３を充填することが出来る。 As shown in FIG. 5, the cover portion 49 in the cover body 11 has an arc shape with a cross section projecting upward, and the arc is slightly opened by elasticity. The distance from the position of the lower surface of both ends of the cover portion 49 to the upper end surface of the locking portion 51 is d, the bending allowance in the cover portion 49 (the height of the position of the central portion where the insertion piece portion 47 is provided from the position of the lower surface of both ends) If the distance of the direction) is e (see FIG. 5) and the thickness of the portion of the large joint portion 5b on which the heavy anticorrosion coating 3 is applied is c, d and e in the cover portion 49 are d <c <e. It is preferable to set as follows. By setting in this way, the cover part 49 adheres to the heavy anticorrosion coating surface due to its elasticity, and the filler 13 can be efficiently filled.
＜充填材＞
充填材１３は、連結された継手部５とカバー体１１との隙間に充填されるものであり、特にその材料を限定するものではないが、水中硬化性のポリウレタン樹脂、エポキシ樹脂、モルタルなどを用いることが出来る。また、充填材１３はその強度によりカバー体１１を固定する機能も有する。
<Filler>
The filler 13 is filled in the gap between the connected joint portion 5 and the cover body 11, and the material is not particularly limited, but an underwater curable polyurethane resin, epoxy resin, mortar, or the like is used. Can be used. The filler 13 also has a function of fixing the cover body 11 by its strength.
次に、上記のような鋼矢板構造物１の施工方法を説明する。
鋼矢板７は、一枚ずつバイブロハンマーによって隣接する継手部５を連結しながら地中に打設する。鋼矢板７を打設した後、カバー体１１を設置する。カバー体１１の設置方法は、係止部５１が係止片部３９に係止するようにして、溝状開口部９の上端側からカバー体１１の挿入片部４７を挿入してスライドさせるようにしてもよいし、鋼矢板７の表面側から挿入片部４７を溝状開口部９に押し込むようにしてもよい。
カバー体１１を設置した後、継手部５とカバー体１１の隙間に充填材１３を充填することで継手部５の防食を行う。充填材１３の注入はチューブを用いて行うのが好ましい。つまり、カバー体１１のすき間にチューブを挿入し、下部から順に充填していくことでより隙間なく充填することが可能である。
Next, the construction method of the above steel sheet pile structure 1 is demonstrated.
The steel sheet piles 7 are driven into the ground one by one while connecting adjacent joint portions 5 with a vibro hammer. After placing the steel sheet pile 7, the cover body 11 is installed. The cover body 11 is installed such that the locking portion 51 is locked to the locking piece portion 39 so that the insertion piece portion 47 of the cover body 11 is inserted and slid from the upper end side of the groove-shaped opening 9. Alternatively, the insertion piece 47 may be pushed into the groove-shaped opening 9 from the surface side of the steel sheet pile 7.
After the cover body 11 is installed, the joint portion 5 is anticorrosive by filling the gap 13 between the joint portion 5 and the cover body 11 with the filler 13. The filling material 13 is preferably injected using a tube. In other words, it is possible to fill without gaps by inserting a tube into the gap of the cover body 11 and filling in order from the bottom.
以上のように、本実施の形態の鋼矢板構造物１によれば、継手部５の連結部へのカバー体１１の設置がカバー体１１の挿入片部４７を溝状開口部９に挿入するだけで可能となり、カバー体１１の設置工程が工具なしで行うことが可能となり、従来例に比較して施工性に優れている。 As described above, according to the steel sheet pile structure 1 of the present embodiment, the installation of the cover body 11 to the connection portion of the joint portion 5 inserts the insertion piece portion 47 of the cover body 11 into the groove-shaped opening 9. It becomes possible only by this, and it becomes possible to perform the installation process of the cover body 11 without a tool, and it is excellent in workability compared with the conventional example.
なお、上記の実施の形態においては鋼矢板７の例として、図３に示したＺ形鋼矢板を示したが、本発明の鋼矢板７はこれに限られるものではない。例えば、ウェブ１９とフランジ２１、２３の成す角度、ウェブ４１とフランジ４３、４５の成す角度については、図３に示したものに限定されず、例えば図６に示すように、これらの角度がより直角に近いものであってもよい。 In addition, in said embodiment, although the Z-shaped steel sheet pile shown in FIG. 3 was shown as an example of the steel sheet pile 7, the steel sheet pile 7 of this invention is not restricted to this. For example, the angle formed by the web 19 and the flanges 21 and 23 and the angle formed by the web 41 and the flanges 43 and 45 are not limited to those shown in FIG. 3. For example, as shown in FIG. It may be close to a right angle.
また、上記の実施の形態におけるＺ形鋼矢板の継手部５は一方が小継手部５ａで他方が大継手部５ｂであったが、本発明の鋼矢板７はこれに限られるものではなく、図７、図８に示すように、一対のＺ形鋼矢板のうちの一方は、図７（ａ）又は図８（ａ）に示すように、開口の幅が大きい大継手部５ｂを両端に備えてなり、開口側の面に重防食被覆３が施されており、他方は、図７（ｂ）又は図８（ｂ）に示すように、開口の幅が小さい小継手部５ａを両端に備えてなり、開口側と反対側の面に重防食被覆３が施されているようなものであってもよい。なお、図７において、図３と同一部分、相当する部分には同一の符号が付してある。 Moreover, although the joint part 5 of the Z-shaped steel sheet pile in the above embodiment was one of the small joint part 5a and the other was the large joint part 5b, the steel sheet pile 7 of the present invention is not limited to this, As shown in FIGS. 7 and 8, one of the pair of Z-shaped steel sheet piles has a large joint portion 5b having a large opening at both ends, as shown in FIG. 7 (a) or FIG. 8 (a). A heavy anti-corrosion coating 3 is applied to the surface on the opening side, and the other is, as shown in FIG. 7 (b) or FIG. 8 (b), a small joint portion 5a having a small opening width at both ends. It may be provided and a heavy anticorrosion coating 3 may be provided on the surface opposite to the opening side. In FIG. 7, the same parts as those in FIG.
また、上記の実施の形態においては、鋼矢板７の例として、図３、図６、図７、図８に示したＺ形鋼矢板を示したが、本発明はこれに限られるものではなく、図９、図１０に示すように、両側のフランジの一方に大継手部５ｂを有し、他方に小継手部５ａを有し、大継手部５ｂと小継手部５ａの開口の向きが逆向きで、かつ大継手の開口側の面に重防食被覆３が施されたハット形鋼矢板５３のようなものを含む。 Moreover, in said embodiment, although the Z-shaped steel sheet pile shown in FIG.3, FIG.6, FIG.7, FIG. 8 was shown as an example of the steel sheet pile 7, this invention is not limited to this. 9 and FIG. 10, the large joint portion 5b is provided on one of the flanges on both sides, the small joint portion 5a is provided on the other side, and the opening directions of the large joint portion 5b and the small joint portion 5a are reversed. It includes a hat-shaped steel sheet pile 53 that is oriented and has a heavy anticorrosion coating 3 on the opening side surface of the large joint.
以下に実施の形態１の実施例を示す。 Examples of the first embodiment are shown below.
本実施例のＺ形鋼矢板は、鋼種ＳＹ２９５で、厚み２５０ｍｍ×幅７００ｍｍ、長さ５０００ｍｍの連続鋳造ブルームを用いて、熱間圧延で製造したものである。
圧延時の素材ウェブ温度を、粗圧延機で１０５０〜１２５０℃、中間圧延機で９００〜１０５０℃、仕上げ圧延機で７００〜８５０℃として圧延を行った。前記３台の圧延機は従来の鋼矢板製造に用いる孔型を有するロールからなる圧延機である。その結果、何らのトラブルなく製品の鋼矢板が安定して製造できた。製品のサイズは、ウェブ部厚み１６．０ｍｍ、有効幅６３０ｍｍ、フランジ部厚み９．０ｍｍ、有効高さ４３０ｍｍである。
The Z-shaped steel sheet pile of this example is a steel type SY295, which is manufactured by hot rolling using a continuous casting bloom having a thickness of 250 mm, a width of 700 mm, and a length of 5000 mm.
Rolling was performed at a raw material web temperature during rolling of 1050 to 1250 ° C. with a rough rolling mill, 900 to 1050 ° C. with an intermediate rolling mill, and 700 to 850 ° C. with a finishing rolling mill. The three rolling mills are rolling mills composed of rolls having a hole shape used in conventional steel sheet pile manufacturing. As a result, the product steel sheet pile could be stably manufactured without any trouble. The product has a web portion thickness of 16.0 mm, an effective width of 630 mm, a flange portion thickness of 9.0 mm, and an effective height of 430 mm.
Ｚ形鋼矢板表面における飛沫、干満帯に相当する部位４ｍに、重防食被覆３として３ｍｍ厚さのポリウレタン被覆を行った。継手近傍の被覆のない部分（図４参照）はaが２０ｍｍ、ｂが５ｍｍであった。 A polyurethane coating having a thickness of 3 mm was applied as a heavy anticorrosion coating 3 to a portion 4 m corresponding to the splash and tidal zone on the surface of the Z-shaped steel sheet pile. In the uncovered portion in the vicinity of the joint (see FIG. 4), a was 20 mm and b was 5 mm.
重防食被覆３を施したＺ形鋼矢板を海浜部に継手部５を連結させながら打設した。打設後、長さ４ｍのカバー体１１を継手部５の溝状開口部９に設置した。設置したカバー体１１は、ウレタンゴム製のものであり、カバー部４９の幅が１２０ｍｍで、厚さ３ｍｍの係止部５１を有するものである。設置方法は、カバー体１１を溝状開口部９の上端側からスライドさせる方法を用いた。
その後、カバー体１１と継手部５間の空隙に上部からチューブを挿入し、止水剤として水中硬化型エポキシ樹脂を充填した。
A Z-shaped steel sheet pile with a heavy anticorrosion coating 3 was placed while connecting the joint 5 to the beach. After the placement, a cover body 11 having a length of 4 m was installed in the groove-shaped opening 9 of the joint portion 5. The installed cover body 11 is made of urethane rubber, and has a cover portion 49 having a width of 120 mm and a locking portion 51 having a thickness of 3 mm. As the installation method, a method of sliding the cover body 11 from the upper end side of the groove-shaped opening 9 was used.
Thereafter, a tube was inserted into the gap between the cover body 11 and the joint part 5 from above and filled with an underwater curable epoxy resin as a water-stopping agent.
比較例として前記Ｚ形鋼矢板打設後、防食カバー取り付けと止水剤充填を行わない部位を同時に設置した。 As a comparative example, after the Z-shaped steel sheet pile was placed, a part where the anticorrosion cover was attached and the waterproofing agent was not filled was installed simultaneously.
施工１年後に外観観察を行った。
本実施例の防食カバーを取り付けた継手部５は全く腐食せず錆の発生がみられず良好な状態を保っていた。一方、防食カバーを取り付けなかった継手部５は腐食し、錆が発生していた。
このことから、本発明の効果が実証された。
The appearance was observed one year after the construction.
The joint part 5 to which the anticorrosion cover of this example was attached was not corroded at all and no rust was observed, and the good condition was maintained. On the other hand, the joint part 5 to which the anticorrosion cover was not attached was corroded and rust was generated.
From this, the effect of the present invention was proved.
１ 鋼矢板構造
３ 重防食被覆
５ 継手部
５ａ 小継手部
５ｂ 大継手部
７ 鋼矢板
９ 溝状開口部
１１ カバー体
１３ 充填材
１５ 第１Ｚ形鋼矢板
１７ 第２Ｚ形鋼矢板
１９ ウェブ（第１Ｚ形鋼矢板）
２１ 上フランジ（第１Ｚ形鋼矢板）
２３ 下フランジ（第１Ｚ形鋼矢板）
２９ 凹溝（小継手部）
３１ 鉤状部（小継手部）
３３ 凸状部
３５ 凹溝（大継手部）
３７ 鉤状部（大継手部）
３９ 係止片部
４１ ウェブ（第２Ｚ形鋼矢板）
４３ 上フランジ（第２Ｚ形鋼矢板）
４５ 下フランジ（第２Ｚ形鋼矢板）
４７ 挿入片部
４９ カバー部
５１ 係止部
５３ ハット形鋼矢板
DESCRIPTION OF SYMBOLS 1 Steel sheet pile structure 3 Heavy anti-corrosion coating 5 Joint part 5a Small joint part 5b Large joint part 7 Steel sheet pile 9 Groove-shaped opening part 11 Cover body 13 Filler 15 1Z-shaped steel sheet pile 17 2Z-shaped steel sheet pile 19 Web (1st Z Steel sheet pile)
21 Upper flange (1st Z-shaped steel sheet pile)
23 Lower flange (1st Z-shaped steel sheet pile)
29 Groove (small joint)
31 bowl-shaped part (small joint part)
33 Convex part 35 Concave groove (large joint part)
37 bowl-shaped part (large joint part)
39 Locking piece 41 Web (second Z-shaped steel sheet pile)
43 Upper flange (2nd Z-shaped steel sheet pile)
45 Lower flange (2nd Z-shaped steel sheet pile)
47 Insertion part 49 Cover part 51 Locking part 53 Hat-shaped steel sheet pile
Claims (7)
連結された継手部同士の間に形成されて前記重防食被覆が施された面側に溝状に開口する溝状開口部と、
該溝状開口部を形成する前記継手部に形成された係止部と、
前記溝状開口部に挿入されると共に前記係止部に係止する挿入片部と、隣り合う鋼矢板の前記重防食被覆に跨るように前記継手部の連結部をカバーするカバー部とを有するカバー体とを備えてなることを特徴とする鋼矢板構造物。 A steel sheet pile structure formed by connecting a steel sheet pile having a joint portion at both ends while being provided with a heavy anti-corrosion coating on one surface,
A groove-shaped opening formed in a groove shape on the surface side formed between the connected joint portions and provided with the heavy anticorrosion coating;
A locking portion formed in the joint portion forming the groove-shaped opening;
An insertion piece portion for locking together the locking portion is inserted into the groove-shaped opening, and a cover portion that covers the connecting portion of the joint portion so as to extend in the heavy duty coating adjacent steel sheet pile A steel sheet pile structure comprising: a cover body having a structure.
前記両端部の継手部の開口の向きを逆向きにすると共に、一方の継手部を開口の幅が他方の継手部の開口の幅よりも大きく設定した大継手部とし、他方の継手部を開口の幅が前記大継手部よりも小さい小継手部とし、前記大継手部に小継手部を連結したときに両者間に溝状開口部が形成されるようにしたことを特徴とする鋼矢板。 It is a steel sheet pile structure formed by connecting a steel sheet pile having a heavy anti-corrosion coating on one surface and having joint portions at both ends, and is formed between the connected joint portions, The joint has a groove-like opening that opens in the shape of a groove on the coated surface side, and an insertion piece that is inserted into the groove-like opening, and extends over the heavy anticorrosion coating of adjacent steel sheet piles. A steel sheet pile forming a steel sheet pile structure comprising a cover body that covers the connecting portion of the parts ,
The direction of the opening of the joint portion at both ends is reversed, and one joint portion is a large joint portion whose opening width is set larger than the width of the opening of the other joint portion, and the other joint portion is opened. A steel sheet pile, wherein a small joint portion is smaller than the large joint portion, and a groove-shaped opening is formed between the small joint portion when the small joint portion is connected to the large joint portion.
該鋼矢板は、ウェブと、その両端に形成されたフランジと、各フランジの端部に同じ向きに開口する継手部を備えてなる一対のＺ形鋼矢板であり、
該一対のＺ形鋼矢板の一方は開口の幅が小さい小継手部を両端に備えてなり、開口側と反対側の面に重防食被覆が施され、他方のＺ形鋼矢板は開口の幅が大きい大継手部を両端に備えてなり、開口側の面に重防食被覆が施されていることを特徴とする鋼矢板。 It is a steel sheet pile structure formed by connecting a steel sheet pile having a heavy anti-corrosion coating on one surface and having joint portions at both ends, and is formed between the connected joint portions, The joint has a groove-like opening that opens in the shape of a groove on the coated surface side, and an insertion piece that is inserted into the groove-like opening, and extends over the heavy anticorrosion coating of adjacent steel sheet piles. A steel sheet pile forming a steel sheet pile structure comprising a cover body that covers the connecting portion of the parts ,
The steel sheet pile is a pair of Z-shaped steel sheet piles comprising a web, flanges formed at both ends thereof, and joint portions opening in the same direction at the end portions of the respective flanges,
One of the pair of Z-shaped steel sheet piles is provided with a small joint portion having a small opening width at both ends, a heavy anti-corrosion coating is applied to the surface opposite to the opening side, and the other Z-shaped steel sheet pile has an opening width. A steel sheet pile characterized by comprising large joints at both ends and a heavy anticorrosion coating on the opening side surface.
The steel sheet pile according to any one of claims 3 to 6, wherein the surface coated with the heavy anticorrosion coating is formed flat.
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