JP3861962B2 - Straight steel sheet pile - Google Patents

Straight steel sheet pile Download PDF

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Publication number
JP3861962B2
JP3861962B2 JP12935199A JP12935199A JP3861962B2 JP 3861962 B2 JP3861962 B2 JP 3861962B2 JP 12935199 A JP12935199 A JP 12935199A JP 12935199 A JP12935199 A JP 12935199A JP 3861962 B2 JP3861962 B2 JP 3861962B2
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Japan
Prior art keywords
steel sheet
sheet pile
web
joint
linear
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JP12935199A
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JP2000319871A (en
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隆徳 奥井
啓徳 三浦
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JFE Steel Corp
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JFE Steel Corp
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【０００１】
【発明の属する技術分野】
本発明は、直線型鋼矢板に関し、とくに、Ｈ形鋼と溶接結合して連壁用のＨ形複合鋼矢板を構成するのに適した直線型鋼矢板に関する。
【０００２】
【従来の技術】
一般に、鋼矢板にはＵ型、Ｚ型、直線型のものがあり、土木工事の連壁構築に際しては、これらの鋼矢板を継いで打設する。
また、耐力の高い地中壁に適したものとして、これらを組み合わせて継いだ型式や、直線型鋼矢板に鋼板やＨ形鋼を溶接した型式が知られている。
【０００３】
Ｕ型やＺ型の鋼矢板を打設して構築した連壁は、図10にＵ型の例を示すように、壁面に凹凸が生じ、水路側壁に使用した場合には流れによどみを生じる。また、建造物の外壁に使用した場合には美観を損ねたり土地にデッドスペースが生じる等の問題がある。
一方、直線型鋼矢板を打設して構築した場合には上記のような欠点がないことから、近年では鋼板やＨ形鋼と溶接したうえで使用されることが多くなり、これに用いられる直線型鋼矢板の形状や製造方法に関する技術がいくつか提案されている。
【０００４】
例えば、特開平８−100422号公報には、ウエブ部の両端に非対称ラルゼン形継手部を設けてなる直線形鋼矢板において、上記継手部の一方が、ウエブ部の一端における打設壁背面側に屈曲形成したフランジ部の延在位置に鍵型爪を設けて構成されており、これと係合する他方の継手部は、ウエブ部他端の打設面と面一に形成された鍵型爪から係合間隔をおいた打設壁背面側に爪外れ防止用の抜止め突条を突設して構成されており、かつ前記ウエブ部の打設背面側の略中央には連結用溶接突条を形成したことを特徴とするＨ形鋼矢板用の直線型鋼矢板が開示されている。
【０００５】
また、例えば、特開昭62−133209号公報には、Ｈ形鋼の一端に溶接してＨ形複合鋼矢板を構成するための部材として、ウエブ両端に接手部（＝継手部）を形成した直線型鋼矢板が開示されている。
【０００６】
【発明が解決しようとする課題】
前記特開平８−100422号公報開示の直線型鋼矢板は、打設背面同士を接続板で溶接した所謂Ｈ形鋼矢板として使用するためにウエブ部の打設背面側の略中央に連結用溶接突条を有するものであり、構築後の壁面が完全な平面になるように工夫されているものの、接続板を連結用溶接突条に溶接する場合、接続板の位置決め、固定等の溶接段取りに手間取るし、溶接変形が生じやすいという欠点がある。
【０００７】
また、前記特開昭62−133209号公報開示の直線型鋼矢板は、Ｈ形鋼の片側フランジ両端を直接矢板ウエブ面に溶接しているので位置決めが容易ではなく、さらに、たとえば、図11のようにＨ形鋼のフランジが若干でも変形している場合には溶接が困難となるという欠点がある。
本発明は、このような従来技術の欠点に鑑み、Ｈ形鋼との溶接結合をする際に位置決めが容易でかつＨ形鋼のフランジが若干変形していても問題なく溶接できる直線型鋼矢板を提供することを目的とする。
【０００８】
【課題を解決するための手段】
本発明は、以下の請求項１〜６に記載される直線型鋼矢板である。
〔請求項１〕 Ｈ形鋼と溶接結合して連壁用のＨ形複合鋼矢板を構成するのに用いる、幅方向中央部分にウエブ部、左右両端部分に継手部を有する直線型鋼矢板において、継手部が左右対称形であり、ウエブ部と継手部の間にウエブ両面側に突起した突起部を、左右の突起部の間隔を前記Ｈ形鋼のフランジ幅に適合させて設けたことを特徴とする直線型鋼矢板。
〔請求項２〕 前記突起部は、突起部のウエブ面とのなす角度を 90 °超とした形状であることを特徴とする請求項１に記載の直線型鋼矢板。
〔請求項３〕 前記突起部は、突起部のウエブ面とのなす角度を 90 °とし、さらに開先を設けた形状であることを特徴とする請求項１に記載の直線型鋼矢板。
【０００９】
〔請求項４〕 幅方向中央部分にウエブ部、左右両端部分に継手部を有する直線型鋼矢板において、継手部が左右対称形であり、ウエブ部と継手部の間にウエブ両面側に突起した突起部を設け、さらにウエブ部両面に複数の突条を設けたことを特徴とする直線型鋼矢板。
〔請求項５〕 幅方向中央部分にウエブ部、左右両端部分に継手部を有する直線型鋼矢板において、継手部が左右対称形であり、ウエブ部と継手部の間にウエブ両面側に突起した突起部を設け、さらにウエブ部両端部分の厚みが中央部分の厚みよりも大きいものとしたことを特徴とする直線型鋼矢板。
〔請求項６〕 前記直線型鋼矢板が、熱間の孔型圧延法により製造されてなることを特徴とする請求項１〜５のいずれかに記載の直線型鋼矢板。
【００１０】
【発明の実施の形態】
図１（ａ）、（ｂ）、（ｃ）はそれぞれ本発明請求項１、４、５に係る直線型鋼矢板の断面図を示すものである。図１（ａ）の本発明請求項１に係る直線型鋼矢板は、Ｈ形鋼と溶接結合して連壁用のＨ形複合鋼矢板を構成するのに用いる、幅方向中央部分にウエブ部２、左右両端部分に継手部３を有する直線型鋼矢板において、継手部３が左右対称形であり、ウエブ部と継手部の間にウエブ両面側に突起した突起部４を、左右の突起部４の間隔をＨ形鋼５のフランジ幅に適合させて設けたことを特徴とする直線型鋼矢板であり、両端部分の継手部３の形状が左右対称形（ウエブ部２の中央に対して面対称）としたので、後述のように孔型圧延で製造する場合に孔型ロールの形成が容易で、かつ圧延時の変形等の発生のおそれがなく容易に圧延できる。
【００１１】
また、ウエブ部２と継手部３の間にウエブ両面側に突起した突起部４を、左右の突起部４の間隔をＨ形鋼５のフランジ幅に適合させて設けているので、破線で示すようにＨ形鋼５をウエブのどちらの面側にも容易に位置合わせできる。なお突起部４の形状は、図２（ａ）に示すように、ウエブ面とのなす角度αが90°超（本発明請求項２に対応）であれば、Ｈ形鋼５との溶接時の開先として使用できるし、図２（ｂ）に示すようにαを90°とし、開先４Ａを設ける形状（本発明請求項３に対応）に圧延してもよく、新たな開先機械加工は不要である。
【００１２】
図１（ｂ）の本発明請求項４に係る直線型鋼矢板は、図１（ａ）の鋼矢板のウエブ部２の両面の両端側に突条２Ａを設けたものである。これによって破線で示すようにＨ形鋼５のフランジが若干変形していても容易に確実な溶接が可能となる。
図１（ｃ）の本発明請求項５に係る直線型鋼矢板は、図１（ａ）の鋼矢板のウエブ部２の厚みを、両端部分で大きく中央部分で小さくしたものである。これによって破線で示すようにＨ形鋼５のフランジが若干変形していても容易に確実な溶接が可能となる。
【００１３】
なお、ウエブ部２の厚みを変化させる場合、Ｈ形鋼５のフランジの変形を吸収し、確実な溶接ができれば、図３にその断面のいくつかの例を示すように曲線形状であっても直線形状であっても、また両者の組合せ形状であってもよい。
図４は、本発明請求項４に係る鋼矢板の一例を用いて形成されたＨ形複合鋼矢板の幅方向連結構造を示す断面図である。同図において、１は本発明鋼矢板、２はウエブ部、２Ａは突条、３は継手部、４は突起部、５はＨ形鋼である。本発明鋼矢板１では、ウエブ両面側に突起した突起部４を設けているので、表裏を反転させてＨ形鋼５と溶接したＨ形複合鋼矢板を順次結合して幅方向に連結できる。なお、左右の突起部４の間隔をＨ形鋼５のフランジ幅Ｗに適合させておくことにより、両突起部４間にＨ形鋼５のフランジを嵌合するだけで容易に溶接位置決めを行うことができ、また、溶接作業中の位置ずれを生じることもない。
【００１４】
また、本発明鋼矢板を用いたＨ形複合鋼矢板は、図５に示すように、本発明鋼矢板１とＨ形鋼５とを長手方向の両端が相補的にはみ出す形に結合して形成するのが好ましい。これにより、Ｈ形複合鋼矢板を２枚以上継いで打設する際に、先に打設された複合鋼矢板の一端側のはみ出し部Ｒ２が、後から打設される複合鋼矢板の他端側のはみ出し部Ｒ１を案内できるため、継ぎ合わせのための現場溶接が容易化すると共に変形も生じにくくなる。
【００１５】
本発明鋼矢板は熱間の孔型圧延法により製造するのが好ましい（本発明請求項６に対応）。熱間の孔型圧延法によれば、左右対称形の鋼矢板の圧延製造が行いやすく、ウエブ部と継手部の間への突起部形成も容易に行うことができるからである。
図６、７、８はそれぞれ本発明請求項１、４、５に係る鋼矢板の製造に好適な孔型圧延法の一例を示す工程図である。図６、７、８において、3Cは圧延途中品ないしは製品の継手部３に形成された爪であり、図１と同一または相当部材には同じ符号を付し説明を省略する。
【００１６】
工程は（ａ）⇒（ｂ）⇒‥‥⇒（ｇ）の順に進行する。（ａ）は圧延前の素材鋼片の断面形状を示す。この素材は鋳片でもあるいは鋳片を圧延したものでもよい。（ｂ）〜（ｃ）ではブレークダウンミルによりウエブ部、突起部、継手部となる部位への粗形付けが行われる。（ｄ）〜（ｇ）では孔型ミルにより幅方向各部位の厚み出し（ｄ，ｅ）、ウエブ部２の断面形状の調整（ｅ）、継手部３の爪３Ｃの形状調整（ｆ）、突起部４と爪３Ｃの角度調整（ｇ）が行われる。なお、請求項１、２、３に係る本発明鋼矢板を製造する場合には、目的とするウエブ部２の断面形状に応じて、（ｅ）の工程で用いる孔型ミルにおいて、それぞれ図６、７、８に示すような断面形状の孔型ロールを使い分ければよく、（ｅ）の上工程および下工程の孔型ロールは同じものでよい。いずれのミルも左右対称形の孔型ロールを上下（当然ながら上下では孔型形状は相違する）に配置して構成されている。なお、素材鋼片加熱温度は1200〜1280℃程度とし、圧延は750 ℃程度で完了する。
【００１７】
図９は、本発明鋼矢板の圧延製造に好適な設備列の一例を示す平面模式図であり、このような設備列を採用することにより、加熱炉FCE で図６〜８における（ａ）の素材鋼片を加熱し、ブレークダウンミルBDで同（ｂ）〜（ｃ）の圧延、第１中間孔型ミルS1で同（ｄ）〜（ｅ）の圧延、第２中間孔型ミルS2で同（ｆ）の圧延、仕上孔型ミルSFで同（ｇ）の圧延を順次、効率よく行うことができる。
【００１８】
【実施例】
図９に示した設備列を用い、図７（ａ）〜（ｇ）に示した工程により公称幅Ｗ１＝500mm の本発明請求項４に係る鋼矢板を製造しこれを用い、図４に示した形態で、ウエブ高さ400mm 、フランジ幅Ｗ＝400mm のＨ形鋼と溶接結合してＨ形複合鋼矢板を形成する作業工程を、50溶接機会について、突起部をもたずかつウエブ部に突条をもたない従来の直線型鋼矢板（従来鋼矢板）を用いた場合と比較したところ、溶接位置決め作業時間が従来の60％にまで短縮し、かつ、従来鋼矢板では５溶接機会に１度の割合で発生していた溶接作業中の位置ずれによる組立形状不具合が、本発明鋼矢板では全く発生しなかった。また若干フランジが変形したＨ形鋼との溶接も容易に実施できた。
【００１９】
【発明の効果】
かくして本発明によれば、Ｈ形鋼との溶接位置決め作業に時間を要さず、溶接作業中の位置ずれもなく、若干変形したフランジを有するＨ形鋼とも容易に確実に溶接できるという優れた効果を奏する。
【図面の簡単な説明】
【図１】 本発明鋼矢板の例を示す断面図である。
【図２】 本発明鋼矢板の突起部の形状を示す断面図である。
【図３】 本発明請求項５に係る鋼矢板のウエブ部の厚み変化の例を示す断面図である。
【図４】 本発明鋼矢板の一例を用いて形成されたＨ形複合鋼矢板の幅方向連結構造を示す断面図である。
【図５】 本発明鋼矢板とＨ形鋼との好ましい結合形態を示す平面図である。
【図６】 本発明請求項１に係る鋼矢板の製造に好適な孔型圧延法の一例を示す工程図である。
【図７】 本発明請求項４に係る鋼矢板の製造に好適な孔型圧延法の一例を示す工程図である。
【図８】 本発明請求項５に係る鋼矢板の製造に好適な孔型圧延法の一例を示す工程図である。
【図９】 本発明鋼矢板の圧延製造に好適な設備列の一例を示す平面模式図である。
【図10】 Ｕ型鋼矢板による連壁を例示する断面図である。
【図11】 従来型鋼矢板とＨ形鋼を溶接する場合の問題点の例を示す図である。
【符号の説明】
１ 本発明鋼矢板
２ ウエブ部
２Ａ 突条
３ 継手部
３Ｃ 爪
４ 突起部
４Ａ 開先
５ Ｈ形鋼
６ 直線型鋼矢板（従来）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a linear steel sheet pile, and more particularly to a linear steel sheet pile suitable for constituting an H-shaped composite steel sheet pile for continuous walls by welding with an H-shaped steel.
[0002]
[Prior art]
In general, there are steel sheet piles of U type, Z type, and straight type, and these steel sheet piles are placed in succession when building a continuous wall for civil engineering work.
Moreover, as a model suitable for the underground wall having high yield strength, a model in which these are combined and a model in which a steel plate or H-shaped steel is welded to a linear steel sheet pile are known.
[0003]
As shown in the example of the U shape in Fig. 10, the wall that is constructed by placing U-shaped and Z-shaped steel sheet piles has irregularities on the wall surface, and when used on the side wall of the waterway, it causes stagnation in the flow. . In addition, when used on the outer wall of a building, there are problems such as loss of aesthetics and dead space on the land.
On the other hand, when it is constructed by placing a straight steel sheet pile, there is no such drawback as described above, so in recent years it is often used after welding with a steel plate or H-shaped steel. Several techniques related to the shape and manufacturing method of the steel sheet pile have been proposed.
[0004]
For example, in Japanese Patent Laid-Open No. 8-100422, in a linear steel sheet pile in which asymmetrical Larzen joints are provided at both ends of a web part, one of the joints is placed on the rear side of the casting wall at one end of the web part. A key-type claw is formed by providing a key-type claw at an extended position of the bent flange part, and the other joint part engaged with the flange is formed flush with the placement surface of the other end of the web part. And a protruding protrusion for preventing the claw from coming off on the back side of the casting wall spaced from the engagement space, and a connecting welding projection at the approximate center of the web part on the back side of the casting wall. A straight steel sheet pile for an H-shaped steel sheet pile characterized by forming a strip is disclosed.
[0005]
Further, for example, in Japanese Patent Application Laid-Open No. 62-133209, joint portions (= joint portions) are formed at both ends of a web as a member for constituting an H-shaped composite steel sheet pile by welding to one end of an H-shaped steel. A straight steel sheet pile is disclosed.
[0006]
[Problems to be solved by the invention]
The linear steel sheet pile disclosed in Japanese Patent Application Laid-Open No. Hei 8-100422 is a welding weld projection for connection at a substantially center on the rear side of the web portion for use as a so-called H-shaped steel sheet pile in which the rear surfaces are welded with a connecting plate. Although it has strips and is devised so that the wall surface after construction is completely flat, when welding the connection plate to the welding welding ridge, it takes time for welding setup such as positioning and fixing of the connection plate However, there is a drawback that welding deformation easily occurs.
[0007]
Further, the linear steel sheet pile disclosed in Japanese Patent Laid-Open No. 62-133209 is not easy to position because both ends of one side flange of H-shaped steel are directly welded to the sheet pile web surface. Further, for example, as shown in FIG. In addition, there is a drawback that welding is difficult when the flange of the H-shaped steel is slightly deformed.
In view of the disadvantages of the prior art, the present invention provides a linear steel sheet pile that can be easily positioned when welded to an H-section steel and can be welded without problems even if the flange of the H-section steel is slightly deformed. The purpose is to provide.
[0008]
[Means for Solving the Problems]
The present invention is a linear steel sheet pile described in claims 1 to 6 below.
[Claim 1] In a linear steel sheet pile having a web portion at a center portion in the width direction and joint portions at both right and left end portions, which are used to form an H-shaped composite steel sheet pile for continuous walls by welding with an H shape steel , The joint part is symmetrical, and a protrusion part protruding on both sides of the web is provided between the web part and the joint part so that the distance between the left and right protrusion parts is adapted to the flange width of the H-shaped steel. A linear steel sheet pile.
[Claim 2] The linear steel sheet pile according to claim 1, wherein the protrusion has a shape in which an angle formed with the web surface of the protrusion exceeds 90 °.
[Claim 3] The linear steel sheet pile according to claim 1, wherein the protrusion has a shape in which an angle formed with the web surface of the protrusion is 90 ° and a groove is provided.
[0009]
[Claim 4 ] In a linear steel sheet pile having a web portion at the center portion in the width direction and joint portions at both left and right end portions, the joint portions are symmetrical, and the projections projecting on both sides of the web between the web portion and the joint portions A linear steel sheet pile characterized by providing a portion and further providing a plurality of protrusions on both sides of the web portion.
[Claim 5 ] In a linear steel sheet pile having a web portion at the center in the width direction and joint portions at both left and right end portions, the joint portions are symmetrical, and the projections projecting on both sides of the web between the web portion and the joint portions the section provided, linear steel sheet pile, characterized by further the thickness of the web portion opposite end portions was made larger than the thickness of the central portion.
[Claim 6] The linear steel sheet pile according to any one of claims 1 to 5, wherein the linear steel sheet pile is manufactured by hot perforation rolling.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
1 (a), 1 (b), and 1 (c) show cross-sectional views of linear steel sheet piles according to claims 1, 4 and 5 of the present invention, respectively. The linear steel sheet pile according to claim 1 of the present invention shown in FIG. 1 (a) is used to construct an H-shaped composite steel sheet pile for connecting walls by welding with an H-shaped steel, and a web portion 2 at the center in the width direction. In the linear steel sheet pile having the joint portions 3 at both left and right end portions, the joint portion 3 has a left-right symmetric shape, and the projection portions 4 projecting on both sides of the web between the web portion and the joint portion are connected to the left and right projection portions 4. It is a linear steel sheet pile characterized in that the interval is adapted to the flange width of the H-section steel 5 , and the shape of the joint portion 3 at both end portions is symmetrical (plane symmetry with respect to the center of the web portion 2). Therefore, as will be described later, when manufacturing by hole rolling, a hole roll can be easily formed, and rolling can be easily performed without the possibility of deformation during rolling.
[0011]
Moreover, since the protrusion part 4 protruded on the both sides of the web is provided between the web part 2 and the joint part 3 so that the distance between the left and right protrusion parts 4 is adapted to the flange width of the H-shaped steel 5, it is indicated by a broken line. Thus, the H-section steel 5 can be easily positioned on either side of the web. As shown in FIG. 2A, the shape of the protrusion 4 is such that when the angle α formed with the web surface exceeds 90 ° (corresponding to claim 2 of the present invention ), the projection 4 is welded to the H- section steel 5. As shown in FIG. 2 (b), it may be rolled into a shape (corresponding to claim 3 of the present invention) where α is 90 ° and provided with a groove 4A. No processing is necessary.
[0012]
The linear steel sheet pile according to claim 4 of the present invention in FIG. 1 (b) is provided with protrusions 2A on both end sides of both surfaces of the web portion 2 of the steel sheet pile in FIG. 1 (a). As a result, as shown by the broken line, even if the flange of the H-section steel 5 is slightly deformed, reliable welding can be easily performed.
The linear steel sheet pile according to claim 5 of the present invention in FIG. 1 (c) is obtained by reducing the thickness of the web portion 2 of the steel sheet pile in FIG. 1 (a) at both end portions and at the central portion. As a result, as shown by the broken line, even if the flange of the H-section steel 5 is slightly deformed, reliable welding can be easily performed.
[0013]
In addition, when changing the thickness of the web part 2, if the deformation of the flange of the H-section steel 5 is absorbed and reliable welding can be performed, even if it has a curved shape as shown in some examples of its cross section in FIG. It may be a linear shape or a combination of both.
Figure 4 is a sectional view showing a widthwise connection structure of H-shaped composite sheet pile formed by using an example of a steel sheet pile according to the present invention according to claim 4. In the figure, 1 is a steel sheet pile of the present invention, 2 is a web portion, 2A is a protrusion, 3 is a joint portion, 4 is a projection portion, and 5 is an H-shaped steel. In the steel sheet pile 1 of the present invention, since the protrusions 4 are provided on both sides of the web, the H-shaped steel sheet piles that are welded to the H-section steel 5 by reversing the front and back can be sequentially connected in the width direction. By aligning the distance between the left and right projections 4 with the flange width W of the H-section steel 5, welding positioning can be easily performed simply by fitting the flange of the H-section steel 5 between the projections 4. In addition, there is no misalignment during the welding operation.
[0014]
In addition, as shown in FIG. 5, an H-shaped composite steel sheet pile using the steel sheet pile of the present invention is formed by joining the steel sheet pile 1 of the present invention and the H-shaped steel 5 in a form in which both ends in the longitudinal direction protrude complementarily. It is preferable to do this. Thus, when two or more H-shaped composite steel sheet piles are to be cast, the protruding portion R2 on one end side of the composite steel sheet pile previously cast is the other end of the composite steel sheet pile to be cast later. Since the protruding portion R1 on the side can be guided, field welding for joining is facilitated and deformation is less likely to occur.
[0015]
The steel sheet pile of the present invention is preferably manufactured by hot piercing rolling (corresponding to claim 6 of the present invention) . This is because according to the hot hole rolling method, it is easy to roll and manufacture a symmetrical steel sheet pile, and it is also possible to easily form a protrusion between the web portion and the joint portion.
6, 7, and 8 are process diagrams showing an example of a hole rolling method suitable for manufacturing steel sheet piles according to claims 1, 4 , and 5 of the present invention, respectively. 6, 7, and 8, reference numeral 3 </ b> C denotes a claw formed in the rolling intermediate product or the joint portion 3 of the product, and the same or corresponding members as in FIG.
[0016]
The process proceeds in the order of (a)->(b)-> ... (g). (A) shows the cross-sectional shape of the raw steel piece before rolling. This material may be a slab or a rolled slab. In (b) to (c), rough forming is performed on the parts that become the web part, the protrusion part, and the joint part by the breakdown mill. In (d) to (g), the thickness of each part in the width direction (d, e) is adjusted by a hole mill, adjustment of the cross-sectional shape of the web part 2 (e), adjustment of the shape of the claw 3C of the joint part 3 (f), Angle adjustment (g) between the protrusion 4 and the claw 3C is performed. In addition, when manufacturing the steel sheet pile of this invention which concerns on Claims 1, 2, and 3, according to the cross-sectional shape of the target web part 2, in the hole type mill used at the process of (e), FIG. 7 and 8 may be used properly, and the upper and lower process roll rolls in (e) may be the same. Each of the mills is configured by arranging symmetrical hole-type rolls on the upper and lower sides (of course, the hole shape is different on the upper and lower sides). The material billet heating temperature is about 1200 to 1280 ° C, and the rolling is completed at about 750 ° C.
[0017]
FIG. 9 is a schematic plan view showing an example of an equipment row suitable for rolling production of the steel sheet pile of the present invention. By adopting such an equipment row, the heating furnace FCE is used as shown in (a) of FIGS. The raw steel slab is heated and rolled in the breakdown mill BD (b) to (c), in the first intermediate hole mill S1 (d) to (e), and in the second intermediate hole mill S2. The rolling of the same (f) and the rolling of the same (g) can be performed sequentially and efficiently by the finishing hole mill SF.
[0018]
【Example】
Using the equipment row shown in FIG. 9, a steel sheet pile according to claim 4 of the present invention having a nominal width W1 = 500 mm is manufactured by the steps shown in FIGS. The work process of forming an H-shaped composite steel sheet pile by welding with an H-shaped steel with a web height of 400 mm and a flange width of W = 400 mm in the form of 50 mm welding opportunities without a protrusion and on the web. Compared with the case of using a conventional straight steel sheet pile without a ridge (conventional steel sheet pile), the welding positioning work time is reduced to 60% of the conventional one, and with the conventional steel sheet pile, 5 welding opportunities are required. The assembly shape defect due to the misalignment during the welding operation that occurred at the rate of the degree did not occur at all in the steel sheet pile of the present invention. Also, welding with an H-shaped steel with a slightly deformed flange could be easily performed.
[0019]
【The invention's effect】
Thus, according to the present invention, there is no need for time for welding positioning work with the H-shaped steel, there is no position shift during the welding work, and it is possible to easily and reliably weld the H-shaped steel having a slightly deformed flange. There is an effect.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an example of a steel sheet pile of the present invention.
FIG. 2 is a cross-sectional view showing the shape of the protrusion of the steel sheet pile of the present invention.
FIG. 3 is a cross-sectional view showing an example of a change in thickness of a web portion of a steel sheet pile according to claim 5 of the present invention.
FIG. 4 is a cross-sectional view showing a connecting structure in the width direction of an H-shaped composite steel sheet pile formed using an example of the steel sheet pile of the present invention.
FIG. 5 is a plan view showing a preferred coupling form of the steel sheet pile of the present invention and an H-section steel.
FIG. 6 is a process chart showing an example of a perforated rolling method suitable for manufacturing a steel sheet pile according to claim 1 of the present invention.
FIG. 7 is a process diagram showing an example of a perforated rolling method suitable for manufacturing a steel sheet pile according to claim 4 of the present invention.
FIG. 8 is a process diagram showing an example of a perforated rolling method suitable for manufacturing a steel sheet pile according to claim 5 of the present invention.
FIG. 9 is a schematic plan view showing an example of an equipment row suitable for rolling production of the steel sheet pile of the present invention.
FIG. 10 is a cross-sectional view illustrating a continuous wall made of U-shaped steel sheet piles.
FIG. 11 is a diagram showing an example of a problem when welding a conventional steel sheet pile and an H-shaped steel.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Invention steel sheet pile 2 Web part 2A Projection 3 Joint part 3C Claw 4 Protrusion part 4A Groove 5 H-section steel 6 Linear steel sheet pile (conventional)

Claims (6)

Ｈ形鋼と溶接結合して連壁用のＨ形複合鋼矢板を構成するのに用いる、幅方向中央部分にウエブ部、左右両端部分に継手部を有する直線型鋼矢板において、継手部が左右対称形であり、ウエブ部と継手部の間にウエブ両面側に突起した突起部を、左右の突起部の間隔を前記Ｈ形鋼のフランジ幅に適合させて設けたことを特徴とする直線型鋼矢板。 In a straight steel sheet pile having a web portion at the center in the width direction and joint portions at both left and right end portions, which are used to form an H-shaped composite steel sheet pile for continuous walls by welding with the H- section steel, the joint portions are symmetrical A linear steel sheet pile having a shape and having protrusions projecting on both sides of the web between the web part and the joint part so that the distance between the left and right projections is adapted to the flange width of the H-shaped steel. . 前記突起部は、突起部のウエブ面とのなす角度をThe protrusion is at an angle with the web surface of the protrusion. 9090 °超とした形状であることを特徴とする請求項１に記載の直線型鋼矢板。The linear steel sheet pile according to claim 1, wherein the linear steel sheet pile has a shape exceeding 0 °. 前記突起部は、突起部のウエブ面とのなす角度をThe protrusion is at an angle with the web surface of the protrusion. 9090 °とし、さらに開先を設けた形状であることを特徴とする請求項１に記載の直線型鋼矢板。The linear steel sheet pile according to claim 1, wherein the linear steel sheet pile has a shape with a groove and a groove. 幅方向中央部分にウエブ部、左右両端部分に継手部を有する直線型鋼矢板において、継手部が左右対称形であり、ウエブ部と継手部の間にウエブ両面側に突起した突起部を設け、さらにウエブ部両面に複数の突条を設けたことを特徴とする直線型鋼矢板。 In a linear steel sheet pile having a web portion at the center in the width direction and joint portions at both left and right end portions, the joint portion is bilaterally symmetric, and a protruding portion protruding on both sides of the web is provided between the web portion and the joint portion. A linear steel sheet pile characterized by providing a plurality of protrusions on both sides of the web portion. 幅方向中央部分にウエブ部、左右両端部分に継手部を有する直線型鋼矢板において、継手部が左右対称形であり、ウエブ部と継手部の間にウエブ両面側に突起した突起部を設け、さらにウエブ部両端部分の厚みが中央部分の厚みよりも大きいものとしたことを特徴とする直線型鋼矢板。 In a linear steel sheet pile having a web portion at the center in the width direction and joint portions at both left and right end portions, the joint portion is bilaterally symmetric, and a protruding portion protruding on both sides of the web is provided between the web portion and the joint portion. A linear steel sheet pile characterized in that the thickness of both end portions of the web portion is larger than the thickness of the central portion. 前記直線型鋼矢板が、熱間の孔型圧延法により製造されてなることを特徴とする請求項１〜５のいずれかに記載の直線型鋼矢板。The linear steel sheet pile according to any one of claims 1 to 5, wherein the linear steel sheet pile is manufactured by hot perforation rolling.
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