JP5764909B2 - Steel sheet pile and steel sheet pile wall formed by the steel sheet pile - Google Patents

Steel sheet pile and steel sheet pile wall formed by the steel sheet pile Download PDF

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JP5764909B2
JP5764909B2 JP2010241618A JP2010241618A JP5764909B2 JP 5764909 B2 JP5764909 B2 JP 5764909B2 JP 2010241618 A JP2010241618 A JP 2010241618A JP 2010241618 A JP2010241618 A JP 2010241618A JP 5764909 B2 JP5764909 B2 JP 5764909B2
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steel sheet
sheet pile
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JP2012092589A (en
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恩田　邦彦
邦彦 恩田
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JFE Steel Corp
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Priority to KR1020137010578A priority patent/KR101631739B1/en
Priority to CN201180052144.6A priority patent/CN103180516B/en
Priority to SG2013026059A priority patent/SG189307A1/en
Priority to PCT/JP2011/075234 priority patent/WO2012057359A1/en
Priority to TW100139281A priority patent/TW201229361A/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/02—Sheet piles or sheet pile bulkheads
    • E02D5/03—Prefabricated parts, e.g. composite sheet piles
    • E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/02—Sheet piles or sheet pile bulkheads
    • E02D5/03—Prefabricated parts, e.g. composite sheet piles
    • E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
    • E02D5/06—Fitted piles or other elements specially adapted for closing gaps between two sheet piles or between two walls of sheet piles

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  • Chemical & Material Sciences (AREA)
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  • Mining & Mineral Resources (AREA)
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Description

本発明は、鋼矢板及び該鋼矢板によって形成された鋼矢板壁に関する。   The present invention relates to a steel sheet pile and a steel sheet pile wall formed by the steel sheet pile.

一般的なＵ形鋼矢板は、両端部に嵌合継手部を有している。このようなＵ形鋼矢板は、嵌合継手部を連結させながら一枚ずつ打設して、鋼矢板壁を形成する。この場合、鋼矢板壁に荷重が作用した場合に嵌合継手部のずれにより中立軸が変化し、断面剛性や断面耐力が低下することが知られている。   A general U-shaped steel sheet pile has fitting joints at both ends. Such U-shaped steel sheet piles are placed one by one while connecting the fitting joints to form a steel sheet pile wall. In this case, it is known that when a load is applied to the steel sheet pile wall, the neutral shaft changes due to the displacement of the fitting joint portion, and the cross-sectional rigidity and the cross-sectional yield strength decrease.

これを改善する手法として、予め２枚の鋼矢板を嵌合してかしめまたは溶接などで連結固定して２枚一組からなる１ユニットとして打設する方法がある。
この場合において、従来のＵ形鋼矢板を用いた場合、継手部を連結するために、鋼矢板長手方向の端部から挿入しなければならず、作業がスムーズではないため製造効率の低下やコスト負担増などに繋がることがあった。 As a technique for improving this, there is a method in which two steel sheet piles are fitted in advance and connected and fixed by caulking or welding, and placed as one unit consisting of two sheets.
In this case, when a conventional U-shaped steel sheet pile is used, it must be inserted from the end of the steel sheet pile in the longitudinal direction in order to connect the joints, and the work is not smooth, resulting in a decrease in production efficiency and cost. It may lead to an increase in burden.

これを改善する方法として、特許文献１では、「ウェブ部とその両端に配置されるフランジ部を有するＵ形鋼矢板であって、一方のフランジ部のみに他の鋼矢板と連結するための嵌合用継手を有し、他方のフランジ部には嵌合用継手を有せず、且つ、前記嵌合用継手を有しないフランジ部の先端部が、ウェブ部とフランジ部が交わる角部から、前記の嵌合継手を有するフランジ部の嵌合継手中心部を通りウェブ部と平行する直線上に配置され、又は当該直線を跨いで配置されることを特徴とする鋼矢板。」が提案されている。   As a method for improving this, in Patent Document 1, “a U-shaped steel sheet pile having a web portion and flange portions arranged at both ends thereof, and fitting for connecting only one flange portion to another steel sheet pile. The other flange portion does not have a fitting joint, and the front end portion of the flange portion without the fitting joint starts from the corner where the web portion and the flange portion intersect. A steel sheet pile characterized by being arranged on a straight line passing through the center of the fitting joint of the flange part having the joint joint and parallel to the web part or straddling the straight line has been proposed.

特開２００８−１２１２７９号公報JP 2008-121279 A

特許文献１に記載の鋼矢板では、嵌合用継手はフランジの先端にウェブと平行になるように屈曲されて形成され、他方、嵌合用継手を有しない側は、フランジ部が屈曲されることなく途中で切断されたような形状となっている。
したがって、嵌合用継手を有している側とそうでない側とで、長さや角度が異なっており、左右の非対称性が強くなっている。
このような形状の鋼矢板を圧延にて製造しようとすると、圧延成形過程において、両継手部に作用する圧下力が異なるため、矢板形状全体の反りや曲がり等の不具合が発生する可能性が高い。
したがって、このような形状の鋼矢板では、圧延によって形成することが非常に困難であり、形成方法が限定されてしまうという問題がある。 In the steel sheet pile described in Patent Document 1, the fitting joint is formed to be bent at the tip of the flange so as to be parallel to the web, while the flange portion is not bent on the side having no fitting joint. It has a shape that is cut off halfway.
Therefore, the length and the angle are different between the side having the fitting joint and the side not having the fitting joint, and the left-right asymmetry is strong.
When trying to manufacture a steel sheet pile having such a shape by rolling, the rolling force applied to both joint portions is different in the rolling forming process, so there is a high possibility of problems such as warping and bending of the entire sheet pile shape. .
Therefore, the steel sheet pile having such a shape is very difficult to form by rolling, and there is a problem that the forming method is limited.

また、２枚の鋼矢板を連結する際、嵌合用継手を有しないフランジ部を重ね合せるようにして２枚の鋼矢板を仮組みし、水平に設置した状態で、重ね合わせた部位をかしめや接着剤等で連結固定することになる。
この場合、連結固定方向がウェブ部と平行な直線（水平方向）に対して斜めになることから、かしめを行う載荷方向や接着を行う際の圧加方向を斜めしなければならず、斜めの状態で載荷したり接着をしたりするための工夫が必要となり、製造難度が著しく増大することが懸念される。 In addition, when two steel sheet piles are connected, the two steel sheet piles are temporarily assembled so that the flanges that do not have fitting joints are overlapped, and the overlapped portions are caulked in a state of being horizontally installed. It is connected and fixed with an adhesive or the like.
In this case, since the connecting and fixing direction is inclined with respect to a straight line (horizontal direction) parallel to the web portion, the loading direction in which caulking is performed and the pressing direction in performing bonding must be inclined. It is necessary to devise for loading or bonding in a state, and there is a concern that the manufacturing difficulty will increase significantly.

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、圧延成形による製造に適しており、２枚を連結する連結作業が容易にできる鋼矢板及び該鋼矢板によって形成された鋼矢板壁を得ることを目的としている。   The present invention has been made to solve such a problem, and is suitable for manufacturing by rolling and forming a steel sheet pile that can easily connect two sheets and a steel sheet pile wall formed by the steel sheet pile. The purpose is to get.

（１）本発明に係る鋼矢板は、ウェブ部と、該ウェブ部の両端にフランジ部を有し、圧延によって製造されたＵ形鋼矢板であって、一方のフランジ部の先端に形成された嵌合継手部と、
他方のフランジ部の先端に形成されて、隣接するＵ形鋼矢板と連結するための接合部とを備え、該接合部は、前記フランジ部の先端をウェブ部に平行な方向に屈曲して前記ウェブ部に平行な方向に延びる平板形状からなり、前記接合部における前記ウェブ部に直交する方向の位置が前記嵌合継手部の高さの範囲内に設定され、かつ前記接合部におけるフランジ側の面が隣接するＵ形鋼矢板の接合部と当接する面となっていることを特徴とするものである。
(1) A steel sheet pile according to the present invention is a U-shaped steel sheet pile having a web portion and flange portions at both ends of the web portion, manufactured by rolling, and formed at the tip of one flange portion. A mating joint,
Formed at the front end of the other flange portion, and provided with a joint portion for connecting to an adjacent U-shaped steel sheet pile, the joint portion bending the front end of the flange portion in a direction parallel to the web portion, and It consists of a flat plate shape extending in a direction parallel to the web part, the position in the direction perpendicular to the web part in the joint part is set within the range of the height of the fitting joint part , and on the flange side in the joint part The surface is a surface that comes into contact with a joint portion of adjacent U-shaped steel sheet piles .

（２）また、上記（１）に記載のものにおいて、前記接合部のフランジ側の面が、前記の嵌合継手部の中心部を通りウェブ部と平行する直線上に配置されていることを特徴とするものである。 (2) Moreover, in the thing as described in said (1), the surface by the side of the flange of the said joint part is arrange | positioned on the straight line which passes along the center part of the said fitting joint part, and is parallel to a web part. It is a feature.

（３）また、上記（１）又は（２）に記載のものにおいて、前記接合部におけるフランジ側の面に、凹凸部を設けたことを特徴とするものである。 (3) Further, in the above-described (1) or (2), an uneven portion is provided on the flange-side surface of the joint portion.

（４）本発明に係る鋼矢板壁は、上記（１）乃至（３）のいずれかに記載の鋼矢板２枚を、前記接合部におけるフランジ側面を当接させるように重ね合わせて連結し、該連結したものを地中に打設することによって形成したことを特徴とするものである。 ( 4 ) The steel sheet pile wall according to the present invention is formed by overlapping and connecting two steel sheet piles according to any one of (1) to ( 3 ) so as to contact the flange side surfaces at the joint portion, It is characterized by being formed by driving the connected objects into the ground.

本発明に係る鋼矢板は、一方のフランジ部の先端に形成された嵌合継手部と、他方のフランジ部の先端に形成されて、隣接するＵ形鋼矢板と連結するための接合部とを備え、該接合部は、前記フランジ部の先端をウェブ部に平行な方向に屈曲して前記ウェブ部に平行な方向に延びる平板形状からなり、前記接合部における前記ウェブ部に直交する方向の位置が前記嵌合継手部の高さの範囲内に設定されているので、左右対称断面に近づくことから、圧延成形した場合において、圧延成形過程において、両継手部で圧下力が均一となり、矢板形状全体の反り、曲がり等の不具合の発生を著しく低減できるので、圧延成形によって製造するのに好適である。
また、２枚の鋼矢板の接合部を重ね合わせて接合するに際して、かしめを行う載荷方向や接着を行う際の圧加方向がウェブ部と平行する直線（水平方向）に対して直交方向になることから、連結固定作業が容易となる。 The steel sheet pile according to the present invention includes a fitting joint portion formed at the tip of one flange portion, and a joint portion formed at the tip of the other flange portion for connecting to an adjacent U-shaped steel sheet pile. The joint portion has a flat plate shape that extends in a direction parallel to the web portion by bending the tip of the flange portion in a direction parallel to the web portion, and a position in a direction perpendicular to the web portion at the joint portion. Is set within the range of the height of the fitting joint, so that it approaches a bilaterally symmetric cross section, so in the case of rolling forming, in the rolling forming process, the rolling force becomes uniform at both joints, and the sheet pile shape Since the occurrence of problems such as overall warping and bending can be remarkably reduced, it is suitable for manufacturing by rolling.
In addition, when the joining portions of the two steel sheet piles are overlapped and joined, the loading direction for caulking and the pressing direction for adhering are orthogonal to the straight line (horizontal direction) parallel to the web portion. Therefore, the connecting and fixing work is facilitated.

本発明の一実施の形態に係る鋼矢板の断面形状を示す説明図である。It is explanatory drawing which shows the cross-sectional shape of the steel sheet pile which concerns on one embodiment of this invention. 本発明の一実施の形態に係る鋼矢板を２枚連結する際の態様の説明図である。It is explanatory drawing of the aspect at the time of connecting two steel sheet piles which concern on one embodiment of this invention. 本発明の一実施の形態に係る鋼矢板の接合部の詳細説明図である。It is detailed explanatory drawing of the junction part of the steel sheet pile which concerns on one embodiment of this invention. 本発明の一実施の形態に係る鋼矢板の接合部の他の態様の詳細説明図である。It is detail explanatory drawing of the other aspect of the junction part of the steel sheet pile which concerns on one embodiment of this invention. 本発明の一実施の形態に係る鋼矢板の接合部の他の態様の詳細説明図である。It is detail explanatory drawing of the other aspect of the junction part of the steel sheet pile which concerns on one embodiment of this invention.

本実施の形態に係る鋼矢板１は、ウェブ部３と、該ウェブ部３の両端にフランジ部５を有するＵ形鋼矢板であって、一方のフランジ部５の先端に形成された嵌合継手部７と、他方のフランジ部５の先端に形成されて、他のＵ形鋼矢板と接合するための平板形状の接合部９とを備えてなるものである。
以下、各部を詳細に説明する。 A steel sheet pile 1 according to the present embodiment is a U-shaped steel sheet pile having a web portion 3 and flange portions 5 at both ends of the web portion 3, and a fitting joint formed at the tip of one flange portion 5. A portion 7 and a flat joint portion 9 formed at the tip of the other flange portion 5 for joining with another U-shaped steel sheet pile are provided.
Hereinafter, each part will be described in detail.

＜嵌合継手部＞
嵌合継手部７は、図１に示すように、フランジ部５の先端がウェブ部３に平行で、外方向に屈曲され、さらに先端部に爪部７ａを有するラルゼン型の嵌合継手部である。
なお、図１に示したものはラルゼン型の嵌合継手部であるが、本発明の鋼矢板１の嵌合継手部７はこれに限られるものではなく、例えばラカワナ型などがある。
なお、図１において、嵌合継手部７の幅をＸで、嵌合継手部７の高さをＹで、さらに嵌合継手部７の中心をＰで示している。 <Mating joint part>
As shown in FIG. 1, the fitting joint portion 7 is a Larsen type fitting joint portion in which the tip of the flange portion 5 is parallel to the web portion 3, is bent outward, and further has a claw portion 7 a at the tip portion. is there.
1 shows a Larsen type fitting joint, but the fitting joint 7 of the steel sheet pile 1 of the present invention is not limited to this, and there is, for example, a Lakawana type.
In FIG. 1, the width of the fitting joint portion 7 is indicated by X, the height of the fitting joint portion 7 is indicated by Y, and the center of the fitting joint portion 7 is indicated by P.

＜接合部＞
接合部９は、フランジ部５の先端をウェブ部３に平行で外方向に屈曲して前記ウェブ部３に平行な方向に延びる平板形状に形成した部位である。
接合部９は、図１に示すように、接合部９におけるフランジ側面９ａが、嵌合継手部７の中心部Ｐを通りウェブ部３と平行する直線１１上になるように設定されている。
接合部９をこのように設定することで、左右の対称性が高くなり、圧延によって製造するのに適した形状となる。
また、接合部９を上記のように設定することで、図２に示すように、２枚の鋼矢板１を、接合部９におけるフランジ側面９ａ同士を当接させるように重ね合わせて接合したとき（図２に示すように２枚の鋼矢板１を接合したものを「組合せ鋼矢板」という）に、前記直線１１に対して線対称となり、２枚の連結された鋼矢板１の打設がやり易いという効果もある。 <Joint part>
The joint portion 9 is a portion formed in a flat plate shape extending in a direction parallel to the web portion 3 by bending the front end of the flange portion 5 in parallel to the web portion 3 and outward.
As shown in FIG. 1, the joint portion 9 is set so that the flange side surface 9 a of the joint portion 9 is on a straight line 11 that passes through the center portion P of the fitting joint portion 7 and is parallel to the web portion 3.
By setting the joint portion 9 in this way, the left-right symmetry increases, and the shape is suitable for manufacturing by rolling.
Moreover, when the joining part 9 is set as described above, as shown in FIG. 2, when the two steel sheet piles 1 are overlapped and joined so that the flange side surfaces 9 a in the joining part 9 are brought into contact with each other. (A combination of two steel sheet piles 1 as shown in FIG. 2 is referred to as a “combined steel sheet pile”). The two steel sheet piles 1 connected to each other are symmetrical with respect to the straight line 11. There is also an effect that it is easy to do.

なお、接合部９を嵌合継手部７の位置に対してどのような配置とするかに関し、上記の例では、フランジ側面９ａが、嵌合継手部７の中心部Ｐを通りウェブ部３と平行する直線１１上になるようにしたが、本発明はこれに限られず、接合部９におけるフランジ側面９ａの位置が、嵌合継手部７の高さＹの範囲内になるように配置すればよい。接合部９におけるフランジ側面９ａの位置が、嵌合継手部７の高さＹの範囲内になるとは、より詳細に説明すると、図１に示す断面において、嵌合継手部７の上下面に接し、ウェブ部３に平行な２直線を接合部９側に延長したときにその２本の延長線の間にフランジ側面９ａが配置されるという意味である。
このような配置であれば、圧延での製造や、２枚の鋼矢板１を連結したものの打設における施工性は許容できる範囲となる。 In addition, regarding the arrangement of the joint portion 9 with respect to the position of the fitting joint portion 7, in the above example, the flange side surface 9 a passes through the center portion P of the fitting joint portion 7 and the web portion 3. However, the present invention is not limited to this, and if the flange side surface 9a in the joint portion 9 is positioned so that it is within the range of the height Y of the fitting joint portion 7. Good. More specifically, the position of the flange side surface 9a in the joint portion 9 is within the range of the height Y of the fitting joint portion 7. In the cross section shown in FIG. This means that when two straight lines parallel to the web part 3 are extended to the joint part 9 side, the flange side face 9a is arranged between the two extension lines.
If it is such arrangement | positioning, the workability | operativity in manufacture by rolling and casting of what connected the two steel sheet piles 1 will be an acceptable range.

また、接合部９の幅Ｗは、嵌合継手部７の幅Ｘに対して、0.5Ｘ〜1.5Ｘにするのが好ましく、0.8Ｘ〜1.2Ｘにするのがより好ましい。
接合部９の幅Ｗを上記の範囲にするのは、鋼矢板１の左右のバランスをとりつつ、かつ連結を確実に行い、かつ無駄な鋼重を増やさないためである。
接合部９の幅Ｗが0.5Ｘ未満であると、２枚の鋼矢板１の接合を確実に行なうのが難しくなり、また圧延製造時において左右のバランスが崩れ、製造上の不具合が生じる。
他方、接合部９の幅Ｗが1.5Ｘを越えると、左右のバランスが崩れ、製造上の不具合が生じやすくなる恐れがある。また、連結部は２枚の鋼矢板１を連結した壁体の中心にあるため鋼矢板壁断面に作用する曲げモーメントに対しては寄与しないので、接合部９の幅Ｗの長さが長くなることは単位長さあたりの耐力、剛性が低下することになり、好ましくない。 Further, the width W of the joint portion 9 is preferably 0.5X to 1.5X, and more preferably 0.8X to 1.2X, with respect to the width X of the fitting joint portion 7.
The reason why the width W of the joint portion 9 is in the above range is that the left and right balance of the steel sheet pile 1 is balanced, the connection is reliably performed, and unnecessary steel weight is not increased.
If the width W of the joint portion 9 is less than 0.5X, it becomes difficult to reliably join the two steel sheet piles 1, and the right and left balance is lost during rolling production, resulting in manufacturing problems.
On the other hand, if the width W of the joint portion 9 exceeds 1.5X, the right and left balance is lost, and there is a risk that manufacturing defects are likely to occur. In addition, since the connecting portion is at the center of the wall body connecting the two steel sheet piles 1, it does not contribute to the bending moment acting on the steel sheet pile wall cross section, so the length of the width W of the joint portion 9 is increased. This is not preferable because the yield strength and rigidity per unit length are lowered.

接合部９におけるフランジ側面９ａには、図３に示すような、位置決め用の凸部１３、凹部１５を設けるようにするのが好ましい。
図３に示すような凹凸部を設けることで、位置決めが容易になるという効果に加えて、かしめ（圧加）た際、連結固定をより強固に行えるという効果が期待できる。
２枚の鋼矢板１を連結するに際して、接合部９をかしめ（圧加）により連結固定する場合は、凸部１３の高さを、相手側の凹部１５の深さよりも高く設定するのが好ましい。このようにすることで、かしめによる連結を強固にすることができる。
なお、位置決め用の凹凸部は、図４、図５に示すような、段形状であってもよい。なお、図４に示す鋼矢板１の接合部９が図５に示す鋼矢板１の接合部９に接合されるようになっており、図４の鋼矢板１における接合部９の凸部１３の位置に図５の鋼矢板１における接合部９の凹部１５が配置され、図４の鋼矢板１の凹部１５の位置に図５の鋼矢板１における接合部９の凸部１３が配置されるという関係になっている。 It is preferable that the flange side surface 9a of the joint portion 9 is provided with a positioning convex portion 13 and a concave portion 15 as shown in FIG.
By providing the concavo-convex portion as shown in FIG. 3, in addition to the effect of facilitating positioning, it is possible to expect an effect that the coupling and fixing can be performed more firmly when caulking (pressing).
When the two steel sheet piles 1 are connected, when the joint 9 is connected and fixed by caulking (pressing), the height of the convex portion 13 is preferably set higher than the depth of the concave portion 15 on the other side. . By doing in this way, the connection by caulking can be strengthened.
Note that the positioning irregularities may have a step shape as shown in FIGS. In addition, the junction part 9 of the steel sheet pile 1 shown in FIG. 4 is joined to the junction part 9 of the steel sheet pile 1 shown in FIG. 5, and the convex part 13 of the junction part 9 in the steel sheet pile 1 of FIG. The concave portion 15 of the joining portion 9 in the steel sheet pile 1 in FIG. 5 is arranged at the position, and the convex portion 13 of the joining portion 9 in the steel sheet pile 1 in FIG. 5 is arranged at the position of the concave portion 15 in the steel sheet pile 1 in FIG. It has become a relationship.

上記のように構成された鋼矢板１は、圧延による成形によって形成するのに好適な形状である。
つまり、図１に示すような断面形状とすることにより、両フランジ先端部の長さ、および角度が同程度となり、左右対称断面に近づくことから、圧延成形過程において、両継手部での圧下力が均一に近くなり、矢板形状全体の反り、曲がり等の不具合の発生を著しく低減できる。
また、両側に嵌合継手部７を有する従来の鋼矢板１は圧延設備で製造されるが、本実施の形態の鋼矢板１であれば、このような従来の鋼矢板１の製造に使用される既存の鋼矢板用圧延設備を流用することで製造でき、製造コストを軽減できる。 The steel sheet pile 1 configured as described above has a shape suitable for being formed by forming by rolling.
That is, by making the cross-sectional shape as shown in FIG. 1, the length and angle of both flange front ends become approximately the same, approaching a left-right symmetric cross section, and therefore, the rolling force at both joints in the rolling process. Becomes nearly uniform, and the occurrence of problems such as warping and bending of the entire sheet pile shape can be significantly reduced.
Moreover, although the conventional steel sheet pile 1 which has the fitting joint part 7 on both sides is manufactured with a rolling installation, if it is the steel sheet pile 1 of this Embodiment, it will be used for manufacture of such a conventional steel sheet pile 1. Can be manufactured by diverting existing steel sheet pile rolling equipment, and manufacturing costs can be reduced.

上記のように構成された鋼矢板１は、図２に示すように、２枚の鋼矢板１を、接合部９におけるフランジ側面９ａ同士を重ねるように当接させて連結する。連結に際しては、接合部９を重ね合わせて２枚の鋼矢板１を仮組みし、水平に設置した状態において、かしめや接着剤等で連結固定を行う。このとき、かしめを行う載荷方向や接着を行う際の圧加方向がウェブ部３と平行する直線１１（水平方向）に対して垂直となることから、連結固定作業が容易となる。
なお、鋼矢板１を２枚連結固定する際は鋼矢板全長にわたってかしめてもよいし、たとえば1ｍピッチあるいは３ｍピッチなど飛ばしてかしめてもよく、連結部に生じるせん断力に応じて適宜決めればよい。 As shown in FIG. 2, the steel sheet pile 1 configured as described above connects the two steel sheet piles 1 so that the flange side surfaces 9 a in the joint portion 9 overlap each other. At the time of connection, two steel sheet piles 1 are temporarily assembled by superimposing the joint portions 9, and are connected and fixed with caulking, an adhesive, or the like in a state where they are horizontally installed. At this time, the loading direction for caulking and the pressurizing direction for adhering are perpendicular to the straight line 11 (horizontal direction) parallel to the web portion 3, thus facilitating connection and fixing.
In addition, when two steel sheet piles 1 are connected and fixed, they may be caulked over the entire length of the steel sheet pile, or may be caulked by flying, for example, 1 m pitch or 3 m pitch. .

連結された２枚の鋼矢板１からなる組合せ鋼矢板をバイブロハンマー等によって地中に打設する。
図２に示すように、連結部は、ウェブ部３と平行な方向に延出していることから、特許文献１のように全体の幅が短くなることはないので、別の部材を用いて増幅する必要もない。
組合せ鋼矢板が打設されると、その隣には、嵌合継手部７を嵌合させるようにして別の組合せ鋼矢板を打設し、これを連続して行うことで鋼矢板壁を形成する。 A combined steel sheet pile composed of two connected steel sheet piles 1 is placed in the ground by a vibro hammer or the like.
As shown in FIG. 2, since the connecting portion extends in a direction parallel to the web portion 3, the entire width is not shortened as in Patent Document 1, and is amplified using another member. There is no need to do.
When the combined steel sheet pile is driven, another combined steel sheet pile is driven next to the fitting joint 7 so as to be fitted, and a steel sheet pile wall is formed by performing this continuously. To do.

なお、上記の実施の形態では、接合部９の連結固定方法として、かしめと接着剤による方法を示したが、接合部９に予めボルト穴を設け、ボルト接合するようにしてもよい。
なお、本発明のＵ形鋼矢板は、その基本形体となる鋼矢板１の高さや幅が特に限定されることなく、従来の種々の形体のものと同様の基本形体のものに適用できる。 In the above-described embodiment, a method using caulking and an adhesive is shown as a method for connecting and fixing the joint portion 9. However, a bolt hole may be provided in the joint portion 9 in advance and bolted.
In addition, the U-shaped steel sheet pile of this invention is applicable to the thing of the basic form similar to the thing of the conventional various forms, without specifically limiting the height and width of the steel sheet pile 1 used as the basic form.

１ 鋼矢板
３ ウェブ部
５ フランジ部
７ 嵌合継手部
７ａ 爪部
９ 接合部
９ａ フランジ側面
１１ 直線
１３ 凸部
１５ 凹部 DESCRIPTION OF SYMBOLS 1 Steel sheet pile 3 Web part 5 Flange part 7 Fitting joint part 7a Claw part 9 Joint part 9a Flange side surface 11 Straight line 13 Convex part 15 Concave part

Claims (4)

ウェブ部と、該ウェブ部の両端にフランジ部を有し、圧延によって製造されたＵ形鋼矢板であって、
一方のフランジ部の先端に形成された嵌合継手部と、
他方のフランジ部の先端に形成されて、隣接するＵ形鋼矢板と連結するための接合部とを備え、
該接合部は、前記フランジ部の先端をウェブ部に平行な方向に屈曲して前記ウェブ部に平行な方向に延びる平板形状からなり、前記接合部における前記ウェブ部に直交する方向の位置が前記嵌合継手部の高さの範囲内に設定され、かつ前記接合部におけるフランジ側の面が隣接するＵ形鋼矢板の接合部と当接する面となっていることを特徴とする鋼矢板。 A U-shaped steel sheet pile manufactured by rolling , having a flange portion at both ends of the web portion and the web portion,
A fitting joint formed at the tip of one flange,
It is formed at the tip of the other flange part, and includes a joint part for connecting to an adjacent U-shaped steel sheet pile,
The joint portion has a flat plate shape that is bent in a direction parallel to the web portion by bending a tip of the flange portion, and a position of the joint portion in a direction perpendicular to the web portion is the position of the joint portion. A steel sheet pile, which is set within a height range of a fitting joint portion , and a surface on a flange side of the joint portion is a surface that comes into contact with a joint portion of an adjacent U-shaped steel sheet pile. 前記接合部のフランジ側の面が、前記の嵌合継手部の中心部を通りウェブ部と平行する直線上に配置されていることを特徴とする請求項１記載の鋼矢板。   2. The steel sheet pile according to claim 1, wherein a flange-side surface of the joint portion is disposed on a straight line that passes through the center portion of the fitting joint portion and is parallel to the web portion. 前記接合部におけるフランジ側の面に、凹凸部を設けたことを特徴とする請求項１又は２記載の鋼矢板。   The steel sheet pile according to claim 1 or 2, wherein an uneven portion is provided on a flange-side surface of the joint portion. 請求項１乃至３のいずれかに記載の鋼矢板２枚を、前記接合部におけるフランジ側面を当接させるように重ね合わせて連結し、該連結したものを地中に打設することによって形成したことを特徴とする鋼矢板壁。
The two steel sheet piles according to any one of claims 1 to 3 are connected to each other so as to abut on the flange side surface in the joint portion, and formed by placing the connected ones in the ground. A steel sheet pile wall characterized by that.
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