JP2015081435A - Retaining wall construction member and construction method thereof - Google Patents

Retaining wall construction member and construction method thereof Download PDF

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JP2015081435A
JP2015081435A JP2013219511A JP2013219511A JP2015081435A JP 2015081435 A JP2015081435 A JP 2015081435A JP 2013219511 A JP2013219511 A JP 2013219511A JP 2013219511 A JP2013219511 A JP 2013219511A JP 2015081435 A JP2015081435 A JP 2015081435A
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steel
sheet pile
steel sheet
joint
shape
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篤史 加藤
Atsushi Kato
篤史 加藤
裕章 中山
Hiroaki Nakayama
裕章 中山
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Nippon Steel Corp
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Nippon Steel and Sumitomo Metal Corp
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PROBLEM TO BE SOLVED: To prevent reduction in workability and separation of a joint by competition of a fitting joint caused by deformation of a steel member and a steel sheet pile, and reduce a material cost and a construction cost by using a single member being circulated in a market, when constructing a retaining wall.SOLUTION: A retaining wall constitution member includes a steel member 2 and a steel sheet pile 3 connected to constitute a retaining wall. (i) A plate bent in a shape steel, a plate shape or a polygonal shape is fixed to a flange 2b or a web 2a of the steel member 2, to form a space 7 capable of storing a joint 5 of the steel sheet pile 3. (ii) The steel member 2 and the steel sheet pile 3 are connected without fitting of the joints by inserting the joint 5 into the space 7 while installing the steel sheet pile 3.

Description

本発明は、鋼部材、例えば、H形状鋼部材と鋼矢板を、継手の嵌合を必要としないで接続して、擁壁を構成する部材と、擁壁の構築方法に関する。   The present invention relates to a member constituting a retaining wall by connecting a steel member, for example, an H-shaped steel member and a steel sheet pile without requiring fitting of a joint, and a method for constructing a retaining wall.

従来から、土木・建築分野において、護岸、岸壁、防波堤、砂防ダム、掘削土留壁などに、所要形状の鋼部材と鋼矢板を接続して構築した擁壁が使用されている。   Conventionally, in the civil engineering / architecture field, retaining walls constructed by connecting steel members and steel sheet piles of the required shape to revetments, quay walls, breakwaters, sabo dams, excavation retaining walls, and the like have been used.

図1に、擁壁の一態様を示す(非特許文献1、参照)。図1に示す擁壁は、コネクター1をフランジに固着したH形鋼2(親杭)を先に打設し、その後、H形鋼2の間に、1枚又は複数枚の鋼矢板3を、コネクター1に鋼矢板の継手を嵌合させて打設して構築されている。なお、図1に示す擁壁は、鋼矢板を打設した側を水側にして使用する。   FIG. 1 shows an embodiment of a retaining wall (see Non-Patent Document 1). The retaining wall shown in FIG. 1 has an H-section steel 2 (master pile) with a connector 1 fixed to a flange first, and then one or more steel sheet piles 3 between the H-section steel 2. The connector 1 is constructed by fitting and fitting a steel sheet pile joint. In addition, the retaining wall shown in FIG. 1 is used with the side on which the steel sheet pile is placed placed on the water side.

図1に示す擁壁においては、止水性がよく、擁壁として安定性があり、防食が必要な場合、防食処理が容易である。   In the retaining wall shown in FIG. 1, the water blocking property is good, the retaining wall is stable, and when the corrosion prevention is necessary, the corrosion prevention treatment is easy.

しかし、先行打設するH形状鋼部材の深度方向及び/又は壁体方向における打設精度が悪かったり、後行打設する鋼矢板自身に曲がり、反りが発生すると、継手遊間では吸収し難い施工誤差が発生するため、後行打設する鋼矢板3の継手とコネクター1のせりなどで施工速度が低下するだけでなく、鋼矢板3を所定深度まで打ち込めない高止まりが発生する。   However, if the precision of the H-shaped steel member to be placed in advance is poor in the depth direction and / or the wall direction, or if the steel sheet pile to be subsequently placed is bent and warped, it is difficult to absorb in the joint space. Since an error occurs, not only the construction speed decreases due to the joint of the steel sheet pile 3 and the connector 1 to be placed later, but also a high stop where the steel sheet pile 3 cannot be driven to a predetermined depth occurs.

最悪の場合、局部的に応力が高くなり、鋼矢板3の継手がコネクター1から離脱する。また、コネクター1が高価であるので、材料費が上昇する。   In the worst case, the stress is locally increased, and the joint of the steel sheet pile 3 is detached from the connector 1. Further, since the connector 1 is expensive, the material cost increases.

図2に、擁壁の別の態様を示す(特許文献1、参照)。図2に示す擁壁は、鋼矢板3のフランジ3aに、スリット4aを入れた鋼管4を溶接などで取り付け、鋼管4の内部に、鋼矢板3の継手5を入れ込んで構築されている。   FIG. 2 shows another aspect of the retaining wall (see Patent Document 1). The retaining wall shown in FIG. 2 is constructed by attaching a steel pipe 4 having a slit 4 a to a flange 3 a of a steel sheet pile 3 by welding or the like, and inserting a joint 5 of the steel sheet pile 3 inside the steel pipe 4.

図2に示す擁壁においては、鋼矢板の継手を嵌合させる必要がなく、また、施工誤差を容易に吸収できる。また、鋼矢板の防食範囲を減らすことができる。   In the retaining wall shown in FIG. 2, it is not necessary to fit a steel sheet pile joint, and construction errors can be easily absorbed. Moreover, the corrosion prevention range of a steel sheet pile can be reduced.

しかし、図2に示す擁壁においては、鋼矢板のウェブと鋼管の接合はフレア溶接となるので、溶接部に欠陥が発生し易い。また、曲面を有し角の無い鋼管は、角を有した形鋼に比べて、周方向へ力が作用した時の変形に対する抵抗が小さくなる。   However, in the retaining wall shown in FIG. 2, since the joining of the steel sheet pile web and the steel pipe is flared, defects are likely to occur in the welded portion. In addition, a steel pipe having a curved surface and no corners is less resistant to deformation when a force is applied in the circumferential direction than a section steel having corners.

よって、鋼矢板の施工時の振幅や、鋼矢板の変形により、鋼管の周方向に力が作用すると、鋼矢板との溶接部を支点として鋼管が変形することとなるが、同じ力が作用した場合でも、形鋼を使用した時に比べてスリットの開きが大きくなり、継手が抜け易くなる。さらに、壁体方向の接続部で使用する場合には、必要となる鋼管の本数が増え、材料費及び加工費が増大する。   Therefore, when the force acts in the circumferential direction of the steel pipe due to the amplitude at the time of construction of the steel sheet pile and the deformation of the steel sheet pile, the steel pipe will be deformed with the welded portion with the steel sheet pile as a fulcrum, but the same force was applied. Even in this case, the opening of the slit becomes larger than when the shape steel is used, and the joint is easily removed. Furthermore, when using it in the connection part of a wall body direction, the number of required steel pipes increases and material cost and processing cost increase.

以上説明したように、所要形状の鋼部材と鋼矢板を接続して擁壁を構築する際、又は、鋼矢板を接続して擁壁を構築する際、打設時における鋼部材や鋼矢板の地中での変形が嵌合継手のせりを発生させ、施工性を低下させる。   As explained above, when building a retaining wall by connecting a steel member of a required shape and a steel sheet pile, or when constructing a retaining wall by connecting a steel sheet pile, the steel member or steel sheet pile at the time of placing Deformation in the ground causes the fitting joint to slip, reducing workability.

特許第4231429号公報Japanese Patent No. 4231429

「Steel Foundation Solutions for Projects, Steel Sheet Piling, General Catalogue 2011」(Arcelor Mittal)`` Steel Foundation Solutions for Projects, Steel Sheet Piling, General Catalog 2011 '' (Arcelor Mittal)

鋼矢板の地中での変形について説明する。図3に、鋼矢板の変形態様を示す。図3(a)に、鋼矢板の変形機構を示し、図3(b)に、変形前後の鋼矢板を示す。   The deformation of the steel sheet pile in the ground will be described. In FIG. 3, the deformation | transformation aspect of a steel sheet pile is shown. FIG. 3A shows a deformation mechanism of the steel sheet pile, and FIG. 3B shows the steel sheet pile before and after the deformation.

鋼矢板を土中に打設していくと、鋼矢板の凹部(ウェブとフランジに囲まれた部分)には、周辺地盤よりも高い拘束圧が発生する閉塞領域が形成され、鋼矢板に大きな水平土圧が作用するようになる(図3(a)、参照)。   When steel sheet piles are placed in the soil, a confined area where higher restraint pressure is generated than the surrounding ground is formed in the recesses of the steel sheet piles (portions surrounded by the web and flange). Horizontal earth pressure is applied (see FIG. 3A).

この閉塞領域に作用する水平土圧が、打設時の鋼矢板の変形要因となる。水平土圧は、打設深度が深くなるのに伴い大きくなるので、鋼矢板の変形は下端に向かって大きくなっていき、鋼矢板全幅も拡がる傾向にある(図3(b)、参照)。   The horizontal earth pressure acting on this closed area becomes a deformation factor of the steel sheet pile at the time of placing. Since the horizontal earth pressure increases as the driving depth increases, the deformation of the steel sheet pile tends to increase toward the lower end, and the entire width of the steel sheet pile tends to increase (see FIG. 3B).

鋼矢板の壁体直交方向への変形量や全幅の拡がり量は、鋼矢板の継手の遊間で吸収することになるが、変形量が大きいと、継手同士がせるので、鋼矢板の高止まりや、継手の離脱が発生する。   The amount of deformation of the steel sheet pile in the direction orthogonal to the wall body and the amount of expansion of the full width will be absorbed by the play between the joints of the steel sheet pile. , Joint disengagement occurs.

本発明は、(i)擁壁構築時、鋼部材や鋼矢板の変形を原因とした継手のせりによる施工性の低下や、継手の離脱を防止するとともに、(ii)市場に流通している単一部材を用いて、材料費と工事費を低減することを課題とし、該課題を解決する擁壁構成部材と、擁壁の構築方法を提供することを目的とする。   The present invention (i) prevents the deterioration of workability due to the fitting of the joint caused by deformation of the steel member and the steel sheet pile during construction of the retaining wall and prevents the joint from being detached, and (ii) is distributed in the market. An object is to reduce the material cost and the construction cost by using a single member, and an object is to provide a retaining wall constituent member that solves the problem and a method for constructing the retaining wall.

本発明者らは、上記課題を解決する手法について鋭意検討した。その結果、鋼部材のフランジ又はウェブに、形鋼、板状、又は、多角形状に折り曲げたプレートを溶接で固定して、鋼部材のフランジ及び/又はウェブと、形鋼、板状、又は、多角形状に折り曲げたプレートにより鋼矢板の継手を収容する空間を形成し、かつ、該継手が打設時及び共用時に該空間から離脱しなければ、鋼部材及び鋼矢板が地中で変形しても、施工性の低下や継手の離脱なく壁体を形成できることを見いだした。   The present inventors diligently studied a method for solving the above problems. As a result, the flange or web of the steel member is fixed by welding with a plate bent into a shape, plate or polygonal shape, and the flange and / or web of the steel member and the shape steel, plate or If a space for accommodating a steel sheet pile joint is formed by a plate folded in a polygonal shape, and the joint does not leave from the space during placement and sharing, the steel member and the steel sheet pile will deform in the ground. However, it was found that the wall can be formed without lowering the workability and detaching the joint.

上記鋼矢板の継手を収容する空間は、(1)鋼部材のフランジ及び/又はウェブの面、(2)形鋼、板状、又は、多角形状に折り曲げたプレートの内面、及び、(3)形鋼、板状、又は、多角形状に折り曲げたプレートの固定していない端部から鋼部材のフランジの面に下ろした垂線の3要素で構成される空間である。本発明において、該空間は重要な機能を有するので、後で、空間の定義を図面に基づいて説明する。   The space for housing the steel sheet pile joint is (1) the surface of the flange and / or web of the steel member, (2) the inner surface of the plate bent into a section, plate, or polygon, and (3) It is a space composed of three elements, which are perpendicular to a flange surface of a steel member from an unfixed end of a plate bent into a shape steel, a plate shape, or a polygonal shape. Since the space has an important function in the present invention, the definition of the space will be described later with reference to the drawings.

本発明は、上記知見に基づいてなされたもので、その要旨は以下のとおりである。   This invention was made | formed based on the said knowledge, and the summary is as follows.

(1)鋼部材と鋼矢板を接続して擁壁を構成する部材において、
(i)鋼部材のフランジ又はウェブに、形鋼、板状、又は、多角形状に折り曲げたプレートを固定して、鋼矢板の継手を収容し得る空間を形成し、
(ii)上記空間の内部に、鋼矢板を打設しながら継手を入れ込むことで、継手同士の嵌合なしに鋼部材と鋼矢板を接続する
ことを特徴とする擁壁構成部材。
(1) In a member constituting a retaining wall by connecting a steel member and a steel sheet pile,
(I) A plate that is bent in a shape steel, a plate shape, or a polygonal shape is fixed to a flange or web of a steel member to form a space that can accommodate a steel sheet pile joint,
(Ii) A retaining wall constituting member characterized in that a steel member and a steel sheet pile are connected without fitting between the joints by inserting the joint into the space while placing the steel sheet pile.

(2)前記鋼部材がH形状鋼部材であることを特徴とする前記(1)に記載の擁壁構成部材。   (2) The retaining wall constituting member according to (1), wherein the steel member is an H-shaped steel member.

(3)前記形鋼、板状、又は、多角形状に折り曲げたプレートを、鋼部材のフランジ又はウェブの面から角度をつけて固定したことを特徴とする前記(1)又は(2)に記載の擁壁構成部材。   (3) The plate according to (1) or (2), wherein the plate bent in the shape steel, plate shape, or polygonal shape is fixed at an angle from the surface of the flange or web of the steel member. Retaining wall component.

(4)前記形鋼、板状、又は、多角形状に折り曲げたプレートの固定していない外端部が、鋼部材のフランジ端から引いた板厚方向の垂線より、鋼部材フランジ側におさまることを特徴とする前記(1)〜(3)のいずれかに記載の擁壁構成部材。   (4) The unfixed outer end of the plate bent in the shape steel, plate shape or polygonal shape fits on the steel member flange side from the perpendicular in the plate thickness direction drawn from the flange end of the steel member. The retaining wall constituting member according to any one of the above (1) to (3).

(5)前記形鋼が、H形鋼、溝形鋼、山形鋼のいずれかであることを特徴とする前記(1)〜(4)のいずれかに記載の擁壁構成部材。   (5) The retaining wall constituting member according to any one of (1) to (4), wherein the shape steel is any one of H-shaped steel, groove-shaped steel, and angle steel.

(6)鋼矢板のアーム下面、又は、継手の下面の壁体直交方向への投影面が、鋼部材フランジ上面と重なる範囲を持つように、前記形鋼、板状、又は、多角形状に折り曲げたプレートの固定していない端部と鋼部材フランジとの離間距離を設定したことを特徴とする前記(1)〜(5)のいずれかに記載の擁壁構成部材。   (6) The steel sheet pile arm lower surface or the joint lower surface is bent into the shape steel, plate shape, or polygonal shape so that the projected surface in the direction perpendicular to the wall body overlaps the steel member flange upper surface. The retaining wall constituting member according to any one of (1) to (5), wherein a separation distance between an unfixed end of the plate and the steel member flange is set.

(7)前記形鋼又はプレートを固定した鋼部材のフランジの端部に、鋼矢板の継手が前記空間から離脱するのを防止する離脱防止材を設けたことを特徴とする前記(1)〜(6)に記載の擁壁構成部材。   (7) The above described (1) to (1), wherein a separation preventing material for preventing the joint of the steel sheet pile from separating from the space is provided at an end of the flange of the steel member to which the shape steel or the plate is fixed. The retaining wall constituting member according to (6).

(8)前記鋼矢板の継手に、該継手が前記空間から離脱するのを防止する突起を設けたことを特徴とする前記(1)〜(7)に記載の擁壁構成部材。   (8) The retaining wall constituting member according to any one of (1) to (7), wherein a protrusion for preventing the joint from separating from the space is provided on the joint of the steel sheet pile.

(9)前記鋼部材のフランジ又はウェブと、固定した形鋼又はプレートで形成する空間の内部にモルタルを詰めたことを特徴とする前記(1)〜(8)のいずれかに記載の擁壁構成部材。   (9) The retaining wall according to any one of (1) to (8), wherein a mortar is filled in a space formed by a flange or web of the steel member and a fixed shape steel or plate. Constituent member.

(10)鋼部材と鋼矢板を接続して擁壁を構築する方法において、
(i)鋼部材のフランジ又はウェブに、形鋼、板状、又は、多角形状に折り曲げたプレートを固定して、鋼矢板の継手を収容し得る空間を形成し、
(ii)上記空間の内部に、鋼矢板を打設しながら継手を入れ込むことで、継手同士の嵌合なしに鋼部材と鋼矢板を接続する
ことを特徴とする擁壁の構築方法。
(10) In the method of constructing a retaining wall by connecting a steel member and a steel sheet pile,
(I) A plate that is bent in a shape steel, a plate shape, or a polygonal shape is fixed to a flange or web of a steel member to form a space that can accommodate a steel sheet pile joint,
(Ii) A method for constructing a retaining wall, wherein a steel member and a steel sheet pile are connected to each other without fitting between the joints by inserting the joint into the space while placing the steel sheet pile.

本発明によれば、鋼部材のフランジ又はウェブに、形鋼、板状、又は、多角形状に折り曲げたプレートを固定して形成した空間内で、鋼矢板の継手が自由に動くものの、空間内から継手が離脱しないので、鋼部材や鋼矢板の打設精度が悪くても、継手のせりや高止まりを発生させずに擁壁を構築することができる。   According to the present invention, the steel sheet pile joint moves freely in a space formed by fixing a steel member flange or web to a plate bent in a shape steel, plate shape, or polygonal shape. Therefore, the retaining wall can be constructed without causing the joint to be pulled up or stopped at a high level even if the precision of placing the steel member or the steel sheet pile is poor.

また、上記空間内から継手が離脱しないので、鋼矢板のアーム下面、又は、継手の下面の壁体直交方向への投影面が、鋼部材のフランジ上面と重なる範囲を持つことになり、鋼矢板の壁体直交方向の凹側向きに水平土圧が作用した際には、鋼矢板のアーム下面、又は、継手の下面の壁体直交方向への投影面が、鋼部材のフランジ上面と接触する。   In addition, since the joint does not leave from the space, the bottom surface of the steel sheet pile arm or the projection surface of the bottom surface of the joint in the direction perpendicular to the wall body has a range that overlaps the top surface of the flange of the steel member. When horizontal earth pressure is applied in the direction perpendicular to the wall in the direction perpendicular to the wall, the lower surface of the arm of the steel sheet pile or the projection surface of the lower surface of the joint in the direction perpendicular to the wall contacts the upper surface of the flange of the steel member. .

それ故、鋼矢板に作用する水平土圧は、上記接触面を通じて鋼部材に伝達されて、鋼部材が、鋼矢板に作用する水平土圧を負担する接続構造となるので、継手同士が嵌合していなくとも、接続部は、接続部としての機能を果たすことになる。   Therefore, the horizontal earth pressure acting on the steel sheet pile is transmitted to the steel member through the contact surface, and the steel member has a connection structure that bears the horizontal earth pressure acting on the steel sheet pile. Even if it does not do, a connection part will fulfill | perform the function as a connection part.

さらに、形鋼又はプレートは入手し易い部材であり、そのまま、鋼部材のフランジ又はウェブに溶接で固定して所要の空間を形成できるので、加工の手間が省け、材料費及び加工費を低減することができる。   Furthermore, the shape steel or the plate is an easily available member, and can be fixed to the flange or web of the steel member by welding as it is to form a required space, so that the labor of processing is saved and the material cost and the processing cost are reduced. be able to.

擁壁の一態様を示す図である。It is a figure which shows the one aspect | mode of a retaining wall. 擁壁の別の態様を示す図である。It is a figure which shows another aspect of a retaining wall. 鋼矢板の変形態様を示す図である。(a)は、鋼矢板の変形機構を示し、(b)は、変形前後の鋼矢板を示す。It is a figure which shows the deformation | transformation aspect of a steel sheet pile. (A) shows the deformation | transformation mechanism of a steel sheet pile, (b) shows the steel sheet pile before and behind a deformation | transformation. H形状鋼部材と鋼矢板を接続した擁壁の一部の態様を示す図である。It is a figure which shows the one part aspect of the retaining wall which connected the H-shaped steel member and the steel sheet pile. 鋼部材に形成する、鋼矢板の継手を収容する空間の定義を示す図である。(a)は、溝形鋼で空間を形成する場合を示し、(b)は、プレートで空間を形成する場合を示す。It is a figure which shows the definition of the space which accommodates the coupling of the steel sheet pile formed in a steel member. (A) shows the case where a space is formed with channel steel, and (b) shows the case where a space is formed with a plate. H形状鋼部材と鋼矢板の接続態様を示す図である。(a)は、溝形鋼を、H形状鋼部材のフランジに固定して空間を形成し、H形状鋼部材と鋼矢板を接続する場合を示し、(b)は、リップ付溝形鋼を、H形状鋼部材のフランジに固定して空間を形成し、H形状鋼部材と鋼矢板を接続する場合を示し、(c)は、山形鋼を、H形状鋼部材のフランジに固定して空間を形成し、H形状鋼部材と鋼矢板を接続する場合を示す。It is a figure which shows the connection aspect of an H-shaped steel member and a steel sheet pile. (A) shows the case where the grooved steel is fixed to the flange of the H-shaped steel member to form a space, and the H-shaped steel member and the steel sheet pile are connected. (B) shows the grooved steel with a lip. The case where the space is formed by fixing to the flange of the H-shaped steel member and the H-shaped steel member and the steel sheet pile are connected is shown. (C) is the space by fixing the angle steel to the flange of the H-shaped steel member. The case where H is formed and an H-shaped steel member and a steel sheet pile are connected is shown. H形状鋼部材と鋼矢板の別の接続態様を示す図である。(a)は、山形鋼を、H形状鋼部材のウェブに固定して空間を形成し、H形状鋼部材と鋼矢板を接続する場合を示し、(b)は、溝形鋼を、H形状鋼部材のウェブに固定して空間を形成し、H形状鋼部材と鋼矢板を接続する場合を示し、(c)は、プレートを、H形状鋼部材のウェブに固定して空間を形成し、H形状鋼部材と鋼矢板を接続する場合を示す。It is a figure which shows another connection aspect of an H-shaped steel member and a steel sheet pile. (A) shows the case where angle steel is fixed to the web of an H-shaped steel member to form a space, and the H-shaped steel member and the steel sheet pile are connected, and (b) shows the grooved steel in the H-shape. The case where the space is formed by fixing to the web of the steel member and the H-shaped steel member and the steel sheet pile are connected is shown, and (c) is a method of fixing the plate to the web of the H-shaped steel member to form the space, The case where an H-shaped steel member and a steel sheet pile are connected is shown. 鋼矢板継手の空間内からの離脱を防止し、鋼矢板のアーム下面、又は、継手の下面の壁体直交方向への投影面が、鋼部材のフランジ上面と重なる範囲を持つような、形鋼、板状、又は、多角形状に折り曲げたプレートの固定していない端部と、鋼部材のフランジとの離間距離を示す図である。(a)及び(b)は、継手が、鋼矢板のアーム下面より飛び出ない場合を示し、(c)及び(d)は、継手が、鋼矢板のアーム下面より飛び出す場合を示す。A steel plate that prevents the steel sheet pile joint from coming out of the space and has a range in which the lower surface of the arm of the steel sheet pile or the projection surface of the lower surface of the joint in the direction perpendicular to the wall overlaps the upper surface of the flange of the steel member. It is a figure which shows the separation distance of the edge part which has not fixed the plate bent in plate shape or polygonal shape, and the flange of a steel member. (A) And (b) shows the case where a joint does not protrude from the arm lower surface of a steel sheet pile, and (c) and (d) shows the case where a joint protrudes from the arm lower surface of a steel sheet pile. 鋼矢板のアームの下面の壁体直交方向への投影面が、鋼部材のフランジの上面と重なる範囲を持つ態様を示す図である。It is a figure which shows the aspect which has the range with which the projection surface to the wall body orthogonal direction of the lower surface of the arm of a steel sheet pile overlaps with the upper surface of the flange of a steel member. 鋼矢板の継手の下面の壁体直交方向への投影面が、鋼部材のフランジの上面と重なる範囲を持つ態様を示す図である。It is a figure which shows the aspect which has the range with which the projection surface to the wall body orthogonal direction of the lower surface of the joint of a steel sheet pile overlaps with the upper surface of the flange of a steel member. H形状鋼部材と鋼矢板の別の接続態様を示す図である。(a)は、山形鋼の一方の端部が鋼矢板の継手の凹部に入り込むように、他方の端部をH形状鋼部材のウェブの下端に溶接で固定して、H形状鋼部材と鋼矢板を接続する場合を示し、(b)は、半割の溝形鋼の一方の端部が鋼矢板の継手の凹部に入り込むように、他方の端部(半割で形成された端部)をH形状鋼部材のウェブの下端に溶接で固定して、H形状鋼部材と鋼矢板を接続する場合を示す。It is a figure which shows another connection aspect of an H-shaped steel member and a steel sheet pile. (A) Fixes the other end to the lower end of the web of the H-shaped steel member by welding so that one end of the angle steel enters the recess of the joint of the steel sheet pile. The case where a sheet pile is connected is shown, (b) is the other end part (end part formed in half) so that one end part of a half-cut channel steel may enter into the recessed part of the joint of a steel sheet pile. Is fixed to the lower end of the web of the H-shaped steel member by welding, and the H-shaped steel member and the steel sheet pile are connected. 鋼矢板の継手が、鋼部材のフランジと形鋼で形成される空間から離脱し難くする態様を示す図である。(a)は、鋼矢板の一方の継手を上記空間から離脱し難くする態様を示し、(b)は、鋼矢板の他方の継手を上記空間から離脱し難くする態様を示す。It is a figure which shows the aspect which the coupling of a steel sheet pile makes it difficult to detach | leave from the space formed with the flange and shape steel of a steel member. (A) shows the aspect which makes it difficult to detach | leave one joint of a steel sheet pile from the said space, (b) shows the aspect which makes it difficult to detach | leave the other joint of a steel sheet pile from the said space. 鋼矢板の継手が、鋼部材のフランジと形鋼で形成される空間から離脱し難くする別の態様を示す図である。It is a figure which shows another aspect which the coupling of a steel sheet pile makes it difficult to detach | leave from the space formed with the flange and shape steel of a steel member. 鋼矢板の継手が離脱し難い空間の位置態様を示す図である。It is a figure which shows the position aspect of the space where the coupling of a steel sheet pile is hard to detach | leave. 共用時、擁壁に作用する土圧と水圧の関係を示す図である。It is a figure which shows the relationship between the earth pressure and water pressure which act on a retaining wall at the time of sharing. 仮設時、擁壁に作用する土圧と水圧の関係を示す図である。It is a figure which shows the relationship between the earth pressure and water pressure which act on a retaining wall at the time of temporary installation.

本発明について、図面に基づいて説明する。   The present invention will be described with reference to the drawings.

本発明の擁壁構成部材(以下「本発明部材」ということがある。)は、鋼部材と鋼矢板を接続して擁壁を構成する部材において、
(i)鋼部材のフランジ又はウェブに、形鋼、板状、又は、多角形状に折り曲げたプレートを固定して、鋼矢板の継手を収容し得る空間を形成し、
(ii)上記空間の内部に、鋼矢板を打設しながら継手を入れ込むことで、継手同士の嵌合なしに鋼部材と鋼矢板を接続する
ことを特徴とする。
The retaining wall constituting member of the present invention (hereinafter sometimes referred to as “the present invention member”) is a member that constitutes a retaining wall by connecting a steel member and a steel sheet pile.
(I) A plate that is bent in a shape steel, a plate shape, or a polygonal shape is fixed to a flange or web of a steel member to form a space that can accommodate a steel sheet pile joint,
(Ii) It is characterized in that the steel member and the steel sheet pile are connected without fitting between the joints by inserting the joint into the space while placing the steel sheet pile.

また、本発明の擁壁の構築方法(以下「本発明方法」ということがある。)は、鋼部材と鋼矢板を接続して擁壁を構築する方法において、
(i)鋼部材のフランジ又はウェブに、形鋼、板状、又は、多角形状に折り曲げたプレートを固定して、鋼矢板の継手を収容し得る空間を形成し、
(ii)上記空間の内部に、鋼矢板を打設しながら継手を入れ込むことで、継手同士の嵌合なしに鋼部材と鋼矢板を接続する
ことを特徴とする。
The retaining wall construction method of the present invention (hereinafter sometimes referred to as “the present invention method”) is a method of constructing a retaining wall by connecting a steel member and a steel sheet pile.
(I) A plate that is bent in a shape steel, a plate shape, or a polygonal shape is fixed to a flange or web of a steel member to form a space that can accommodate a steel sheet pile joint,
(Ii) It is characterized in that the steel member and the steel sheet pile are connected without fitting between the joints by inserting the joint into the space while placing the steel sheet pile.

図4に、H形状鋼部材と鋼矢板を接続した擁壁の一部の態様を示す。H形状鋼部材のフランジ2bに、ウェブ2aに近接する位置で溝形鋼6の一方の端部が、フランジ又はウェブの面から角度をつけて溶接で固定され、フランジ2bと溝形鋼6で、鋼矢板3の継手5を収容する空間7が形成されている。   In FIG. 4, the one part aspect of the retaining wall which connected the H-shaped steel member and the steel sheet pile is shown. One end of the channel steel 6 is fixed to the flange 2b of the H-shaped steel member at a position close to the web 2a by welding at an angle from the surface of the flange or web, and the flange 2b and the channel steel 6 A space 7 for accommodating the joint 5 of the steel sheet pile 3 is formed.

本発明部材において、上記空間は重要な機能を有するので、ここで、空間の定義を、図面に基づいて説明する。   In the member of the present invention, since the space has an important function, the definition of the space will be described with reference to the drawings.

図5に、鋼部材に形成する空間の定義を示す。図5(a)に、溝形鋼で空間を形成する場合を示し、図5(b)に、プレートで空間を形成する場合を示す。   FIG. 5 shows the definition of the space formed in the steel member. FIG. 5A shows a case where a space is formed with channel steel, and FIG. 5B shows a case where a space is formed with a plate.

溝形鋼6又はプレート12で形成され、鋼矢板の継手を収容する空間7は、(1)鋼部材のフランジ2b及び/又はウェブ2aの面7a、(2)形鋼、板状、又は、多角形状に折り曲げたプレートの内面7b、及び、(3)形鋼、板状、又は、多角形状に折り曲げたプレートの固定していない端部から鋼部材のフランジの面に下ろした垂線7cの3要素で構成される空間である。   The space 7 formed by the grooved steel 6 or the plate 12 and accommodating the joint of the steel sheet pile is (1) the flange 2b of the steel member and / or the surface 7a of the web 2a, (2) the steel, plate, or The inner surface 7b of the plate bent into a polygonal shape, and (3) 3 of a perpendicular line 7c lowered from the non-fixed end of the steel plate, plate shape, or plate bent into a polygonal shape to the surface of the flange of the steel member A space composed of elements.

空間7の大きさは、少なくとも継手5を収容し得る大きさとする。溝形鋼6のサイズを大きくすると、鋼矢板が打設時に大きく変形しても、その変形量を上記空間内で吸収できるが、溝形鋼の断面積が大きくなるため、鋼部材の打設抵抗が増し、施工性が低下する。よって、溝形鋼のサイズは、継手のサイズ毎に適切に判断する。なお、擁壁を水際に沿って構築する場合、鋼矢板3で形成される凹側が水側となる。   The size of the space 7 is set to a size that can accommodate at least the joint 5. When the size of the channel steel 6 is increased, even if the steel sheet pile is greatly deformed at the time of placing, the amount of deformation can be absorbed in the space, but the cross-sectional area of the channel steel increases, so that the steel member is placed. Resistance increases and workability decreases. Therefore, the size of the channel steel is appropriately determined for each joint size. In addition, when constructing a retaining wall along the waterside, the concave side formed by the steel sheet pile 3 is the water side.

図6に、H形状鋼部材と鋼矢板の接続態様を示す。図6(a)に、溝形鋼を、H形状鋼部材のフランジに固定して空間を形成し、H形状鋼部材と鋼矢板を接続する場合を示し、図6(b)に、リップ付溝形鋼を、H形状鋼部材のフランジに固定して空間を形成し、H形状鋼部材と鋼矢板を接続する場合を示す。図6(c)に、山形鋼を、H形状鋼部材のフランジに固定して空間を形成し、H形状鋼部材と鋼矢板を接続する場合を示す。   In FIG. 6, the connection aspect of an H-shaped steel member and a steel sheet pile is shown. Fig. 6 (a) shows the case where the grooved steel is fixed to the flange of the H-shaped steel member to form a space, and the H-shaped steel member and the steel sheet pile are connected. Fig. 6 (b) shows a case with a lip. A case is shown in which the grooved steel is fixed to the flange of the H-shaped steel member to form a space, and the H-shaped steel member and the steel sheet pile are connected. FIG. 6C shows a case where the angle steel is fixed to the flange of the H-shaped steel member to form a space, and the H-shaped steel member and the steel sheet pile are connected.

図6(a)に示す接続態様は、図4に示す接続態様の拡大で、溝形鋼の一方の端部を、フランジ2bに、H形状鋼部材2のフランジ2b又はウェブ2aの面から角度をつけて溶接で固定して、鋼矢板3の継手5を収容する空間7を形成している。   The connection mode shown in FIG. 6 (a) is an enlargement of the connection mode shown in FIG. 4. One end of the channel steel is angled from the surface of the flange 2b of the H-shaped steel member 2 or the web 2a to the flange 2b. And is fixed by welding to form a space 7 for accommodating the joint 5 of the steel sheet pile 3.

図6(b)に示す接続態様では、溝形鋼の替わりにリップ付溝形鋼9を用いて、鋼矢板3の継手5を収容する空間7を形成している。   In the connection mode shown in FIG. 6 (b), a space 7 for accommodating the joint 5 of the steel sheet pile 3 is formed using a grooved steel 9 with a lip instead of the grooved steel.

図6(c)の接続態様では、山形鋼10の一方の端部を、フランジ2bに、H形状鋼部材2のフランジ2b又はウェブ2aの面から角度をつけて溶接で固定して、鋼矢板3の継手5を収容する空間7を形成している。   6 (c), one end of the angle steel 10 is fixed to the flange 2b by welding at an angle from the surface of the flange 2b or the web 2a of the H-shaped steel member 2, and a steel sheet pile. A space 7 for accommodating the three joints 5 is formed.

図7に、H形状鋼部材と鋼矢板の別の接続態様を示す。図7(a)に、山形鋼を、H形状鋼部材のウェブに固定して空間を形成し、H形状鋼部材と鋼矢板を接続する場合を示し、図7(b)に、溝形鋼を、H形状鋼部材のウェブに固定して、鋼矢板3の継手5を収容する空間を形成し、H形状鋼部材と鋼矢板を接続する場合を示し、図7(c)に、プレートを、H形状鋼部材のウェブに固定して空間を形成し、H形状鋼部材と鋼矢板を接続する場合を示す。   In FIG. 7, another connection aspect of an H-shaped steel member and a steel sheet pile is shown. Fig. 7 (a) shows a case where the angle steel is fixed to the web of the H-shaped steel member to form a space, and the H-shaped steel member and the steel sheet pile are connected. Fig. 7 (b) shows the channel steel. Is fixed to the web of the H-shaped steel member, a space for accommodating the joint 5 of the steel sheet pile 3 is formed, and the case where the H-shaped steel member and the steel sheet pile are connected is shown. FIG. The case where it fixes to the web of a H-shaped steel member, a space is formed, and a H-shaped steel member and a steel sheet pile are connected is shown.

図7(a)に示す接続態様では、山形鋼10の一方の端部を、H形状鋼部材2のウェブ2aに溶接8で固定して、鋼矢板3の継手5を収容する空間7を形成している。図7(b)に示す接続態様では、溝形鋼6の一方の辺を、H形状鋼部材2のウェブ2aに溶接8で固定して、鋼矢板3の継手5を収容する空間を形成している。   In the connection mode shown in FIG. 7A, one end of the angle steel 10 is fixed to the web 2 a of the H-shaped steel member 2 by welding 8 to form a space 7 for accommodating the joint 5 of the steel sheet pile 3. doing. In the connection mode shown in FIG. 7 (b), one side of the channel steel 6 is fixed to the web 2 a of the H-shaped steel member 2 by welding 8 to form a space for accommodating the joint 5 of the steel sheet pile 3. ing.

図7(c)に示す接続態様では、プレート12を、H形状鋼部材2のウェブ2aに溶接8で固定して、鋼矢板3の継手5を収容する空間を形成している。   In the connection mode shown in FIG. 7 (c), the plate 12 is fixed to the web 2 a of the H-shaped steel member 2 by welding 8 to form a space for accommodating the joint 5 of the steel sheet pile 3.

以上、図面に基づいて説明したように、H形状鋼部材のフランジ又はウェブに、単一部材の形鋼又はプレートを溶接で固定して、形鋼又はプレートとH形状鋼部材のフランジで、鋼矢板の継手を収容する空間を形成し、該空間に、鋼矢板を打設しながら鋼矢板の継手を入れ込んで、継手同士の嵌合なしにH形状鋼部材と鋼矢板を接続する。この接続を繰り返して擁壁を構築する。   As described above with reference to the drawings, a steel member or plate of a single member is fixed to the flange or web of the H-shaped steel member by welding, and the steel of the steel plate or the flange of the plate and the H-shaped steel member is used. A space for accommodating the sheet pile joint is formed, and the steel sheet pile joint is inserted into the space while placing the steel sheet pile, and the H-shaped steel member and the steel sheet pile are connected without fitting the joints. Repeat this connection to build a retaining wall.

剛性が大きい鋼部材(親杭)と剛性が小さい鋼部材(鋼矢板)を接続して構築した擁壁においては、剛性の大きい鋼部材(親杭)に土圧が集中し、剛性が小さい鋼部材には、アーチ効果により大きな土圧が作用しない。H形状鋼部材(親杭)と鋼矢板を組み合わせた擁壁構造では、親杭となるH形状鋼部材に土圧が集中し、鋼矢板には大きな土圧が作用せず、鋼矢板は、主に、土塊が崩れ落ちるのを防ぐ役割を担うことになる。   In a retaining wall constructed by connecting a steel member with high rigidity (parent pile) and a steel member with low rigidity (steel sheet pile), earth pressure concentrates on the steel member with high rigidity (parent pile), and steel with low rigidity A large earth pressure does not act on the member due to the arch effect. In the retaining wall structure that combines H-shaped steel members (parent piles) and steel sheet piles, earth pressure concentrates on the H-shaped steel members that become the parent piles, and large earth pressure does not act on the steel sheet piles. Mainly it will play a role in preventing the clot from collapsing.

なお、鋼矢板に作用する土圧は、鋼矢板の継手やアームなどとH形状鋼部材との接触面から、H形状鋼部材に伝達されるので、鋼矢板の継手が嵌合していなくても、擁壁としての機能を発揮する。   In addition, since the earth pressure acting on the steel sheet pile is transmitted to the H-shaped steel member from the contact surface between the steel sheet pile joint or arm and the H-shaped steel member, the steel sheet pile joint is not fitted. It also functions as a retaining wall.

それ故、鋼矢板の継手を、必ずしも嵌合させる必要はなく、鋼矢板の継手は、形鋼又はプレートとH形状鋼部材のフランジで形成される空間内で自由に動くことができるので、壁体の接続部は、H形状鋼部材の施工時に発生するH形状鋼部材の変形や、鋼矢板の打設時に発生する鋼矢板の変形(施工誤差)に対して柔軟に対応することができる。   Therefore, it is not always necessary to fit the steel sheet pile joint, and the steel sheet pile joint can move freely in the space formed by the section steel or the plate and the flange of the H-shaped steel member. The connecting portion of the body can flexibly cope with the deformation of the H-shaped steel member generated at the time of construction of the H-shaped steel member and the deformation (construction error) of the steel sheet pile generated at the time of placing the steel sheet pile.

本発明部材においては、鋼矢板の継手を収容する空間を、市場に流通する形鋼又はプレートに加工を施すことなく、H形状鋼部材のフランジ又はウェブに溶接で固定すればよいので、少ない材料費及び加工費で、H形状鋼部材と鋼矢板の接続部を形成することができる。   In the member of the present invention, the space for housing the steel sheet pile joint may be fixed to the flange or web of the H-shaped steel member by welding without processing the shape steel or plate distributed in the market. The connecting portion between the H-shaped steel member and the steel sheet pile can be formed with cost and processing cost.

H形状鋼部材のフランジ又はウェブに形鋼を溶接する場合、溶接は、可能な限り、形鋼の全長に亘って連続して又は断続して行うのが好ましいが、形鋼内部など、狭い空間内で溶接を行う必要がある場合は、上端及び/又は下端から手の届く範囲で溶接すればよい。ただし、形鋼及びプレートの最下端部は、施工時の抵抗で剥がれ易いので、必ず回し溶接を行う必要がある。   When welding a shape steel to a flange or web of an H-shaped steel member, it is preferable that the welding be performed continuously or intermittently over the entire length of the shape steel as much as possible. When it is necessary to perform welding within the upper limit, the welding may be performed within the reach of the upper end and / or the lower end. However, the bottom end of the shape steel and the plate is easy to peel off due to the resistance during construction, so it is necessary to perform welding by turning.

図8に、鋼矢板継手の空間内からの離脱を防止し、鋼矢板のアーム下面、又は、継手の下面の壁体直交方向への投影面が、鋼部材のフランジ上面と重なる範囲を持つような、形鋼、板状、又は、多角形状に折り曲げたプレートの固定していない端部と、鋼部材のフランジとの離間距離を示す。   In FIG. 8, the steel sheet pile joint is prevented from detaching from the space, and the projection surface of the steel sheet pile arm lower surface or the lower surface of the joint in the direction orthogonal to the wall body overlaps the upper surface of the flange of the steel member. The distance between the unfixed end portion of the plate bent into a shape steel, plate shape or polygonal shape and the flange of the steel member is shown.

離間距離は、形鋼、板状、又は、多角形状に折り曲げたプレートの固定していない端部から、鋼部材のフランジの上面に垂線を下ろしたときの最小距離をいう。図8(a)及び(b)に、継手が、鋼矢板のアーム下面より飛び出ない場合を示し、図8(c)及び(d)に、継手が、鋼矢板のアーム下面より飛び出す場合を示す。   The separation distance refers to the minimum distance when a perpendicular is dropped from the unfixed end of the plate bent into a shape steel, plate shape, or polygonal shape to the upper surface of the flange of the steel member. 8A and 8B show the case where the joint does not jump out from the lower surface of the steel sheet pile arm, and FIGS. 8C and 8D show the case where the joint jumps out from the lower arm surface of the steel sheet pile. .

鋼矢板の継手5が鋼矢板のアーム下面5a'より飛び出ない場合、鋼部材のフランジ(図8(a)及び(b)中の「2b」、参照)と、形鋼、板状、又は、多角形状に折り曲げたプレートの端部6aとの離間距離a(図8(a)及び(b)中の「a」、参照)は、下記式で設定される。   When the steel sheet pile joint 5 does not protrude from the arm lower surface 5a ′ of the steel sheet pile, the steel member flange (see “2b” in FIGS. 8 (a) and (b)) and the shape steel, plate shape, or A separation distance a (see “a” in FIGS. 8A and 8B) with respect to the end 6 a of the plate bent into a polygonal shape is set by the following equation.

t<a<hmax
t:アーム板厚
hmax:継手の最大高さ
離間距離aを上記式で設定することにより、継手5が空間7内に収まり、鋼矢板のアーム下面5a'、又は、継手の下面の壁体直交方向への投影面が、鋼部材のフランジの上面2b'と重なる範囲を持つようになる。
t <a <hmax
t: arm plate thickness hmax: maximum height of joint By setting the separation distance a by the above formula, the joint 5 is accommodated in the space 7, and the arm lower surface 5a 'of the steel sheet pile or the wall orthogonal to the lower surface of the joint The projection surface in the direction has a range that overlaps with the upper surface 2b ′ of the flange of the steel member.

図9に、鋼矢板のアームの下面の壁体直交方向への投影面が、鋼部材のフランジの上面と重なる範囲を持つ態様を示す。即ち、鋼矢板のアーム下面5a'の壁体直交方向への投影面7dが、鋼部材のフランジ2bの上面と重なる範囲7eを持つ。その結果、鋼矢板に作用する壁体直交方向の凹側向きの水平荷重は、投影面7dが重なる範囲7eが接触部となって、鋼矢板から鋼部材に伝達される。   FIG. 9 shows an aspect in which the projection surface of the lower surface of the arm of the steel sheet pile in the direction perpendicular to the wall body overlaps the upper surface of the flange of the steel member. That is, the projection surface 7d of the steel sheet pile arm lower surface 5a ′ in the direction perpendicular to the wall body has a range 7e overlapping with the upper surface of the flange 2b of the steel member. As a result, the horizontal load directed to the concave side in the direction orthogonal to the wall body acting on the steel sheet pile is transmitted from the steel sheet pile to the steel member, with the area 7e where the projection surface 7d overlaps as a contact portion.

この伝達により、鋼部材が、鋼矢板に作用する水平土圧を受けることになるので、接続部は、接続部としての機能を維持することができる。   Since the steel member receives the horizontal earth pressure acting on the steel sheet pile by this transmission, the connecting portion can maintain the function as the connecting portion.

また、継手5が壁体方向に動いた際には、形鋼、板状、又は、多角形状に折り曲げたプレートの固定していない端部6aが、鋼矢板の継手5と接触点を持つので、形鋼、板状、又は、多角形状に折り曲げたプレートが変形しない限り、継手5の壁体方向への抜け出しを防止することができる。   Further, when the joint 5 moves in the direction of the wall body, the unfixed end portion 6a of the plate bent into the shape steel, the plate shape, or the polygonal shape has a contact point with the joint 5 of the steel sheet pile. As long as the plate bent into a shape steel, a plate shape, or a polygonal shape is not deformed, the joint 5 can be prevented from coming out in the direction of the wall.

離間距離aは、空間内からの継手の抜け出しを防止するためには、なるべく小さくしたほうがよいが、鋼部材の製造許容差の範囲で適切に設定すればよい。   The separation distance a is preferably as small as possible in order to prevent the joint from coming out of the space, but may be set appropriately within the range of the manufacturing tolerance of the steel member.

鋼矢板の継手が、鋼矢板のアーム下面より飛び出す場合、鋼部材のフランジ(図8(c)及び(d)中の「2b」、参照)と、形鋼、板状、又は、多角形状に折り曲げたプレートの端部との離間距離a'は、下記式で設定される。   When the steel sheet pile joint protrudes from the lower surface of the steel sheet pile arm, the steel member flange (refer to “2b” in FIGS. 8C and 8D) and the shape steel, plate, or polygonal shape A separation distance a ′ from the end of the bent plate is set by the following equation.

h<a'<hmax
h:アーム上面までの継手の高さ
hmax:継手の最大高さ
鋼矢板の継手が、鋼矢板のアーム下面より飛び出す場合、離間距離a'を上記式に基づいて設定することで、継手の下面の壁体直交方向への投影面が、鋼部材のフランジの上面と重なる範囲を持つようになり、壁体方向への継手の抜け出しも防止できる。
h <a '<hmax
h: Height of the joint up to the upper surface of the arm hmax: Maximum height of the joint When the joint of the steel sheet pile protrudes from the lower surface of the arm of the steel sheet pile, the separation distance a ′ is set based on the above formula, so that the lower surface of the joint The projection surface in the direction orthogonal to the wall body has a range that overlaps with the upper surface of the flange of the steel member, so that the joint can be prevented from coming out in the wall body direction.

図10に、鋼矢板の継手の下面の壁体直交方向への投影面が、鋼部材のフランジの上面と重なる範囲を持つ態様を示す。即ち、鋼矢板の継手下面5'の壁体直交方向への投影面7dが、鋼部材のフランジ上面2b'と重なる範囲7eを持つ。   In FIG. 10, the aspect which has the range with which the projection surface to the wall body orthogonal direction of the lower surface of the joint of a steel sheet pile overlaps with the upper surface of the flange of a steel member is shown. That is, the projection surface 7d of the joint lower surface 5 ′ of the steel sheet pile in the direction orthogonal to the wall body has a range 7e that overlaps the flange upper surface 2b ′ of the steel member.

その結果、鋼矢板に作用する壁体方向の荷重は、投影面7dと重なる範囲7eの接触部で受けることになるので、継手の壁体方向への抜け出しを阻止することができる。即ち、接続部は、接続部としての機能を維持することができる。   As a result, the load in the wall direction acting on the steel sheet pile is received by the contact portion in the range 7e overlapping with the projection surface 7d, so that the joint can be prevented from coming out in the wall direction. That is, the connection unit can maintain the function as the connection unit.

図11に、H形状鋼部材と鋼矢板の別の接続態様を示す図である。図11(a)に、山形鋼10の一方の端部が鋼矢板3の継手5の凹部に入り込むように、他方の端部をH形状鋼部材2のウェブ2aの下端に溶接8で固定して、H形状鋼部材2と鋼矢板3を接続する場合を示す。   In FIG. 11, it is a figure which shows another connection aspect of an H-shaped steel member and a steel sheet pile. In FIG. 11A, the other end is fixed to the lower end of the web 2 a of the H-shaped steel member 2 by welding 8 so that one end of the angle steel 10 enters the recess of the joint 5 of the steel sheet pile 3. And the case where the H-shaped steel member 2 and the steel sheet pile 3 are connected is shown.

また、図11(b)に、半割の溝形鋼6の一方の端部が鋼矢板3の継手5の凹部に入り込むように、他方の端部(半割で形成された端部)をH形状鋼部材2のウェブ2aの下端に溶接で固定して、H形状鋼部材2と鋼矢板3を接続する場合を示す。   Moreover, in FIG.11 (b), the other edge part (edge part formed in half) is inserted so that one edge part of the half-cut channel steel 6 may enter into the recessed part of the coupling 5 of the steel sheet pile 3. As shown in FIG. The case where it fixes to the lower end of the web 2a of the H-shaped steel member 2 by welding and the H-shaped steel member 2 and the steel sheet pile 3 are connected is shown.

図11(a)に示す接続態様では、山形鋼10の一方の端部が鋼矢板3の継手5の凹部に入り込むように、他方の端部をH形状鋼部材2のウェブ2aの下端に溶接8で固定しているので、鋼矢板3の継手5は、山形鋼10とフランジ2bで形成される空間7から離脱し難い。   In the connection mode shown in FIG. 11A, the other end is welded to the lower end of the web 2 a of the H-shaped steel member 2 so that one end of the angle steel 10 enters the recess of the joint 5 of the steel sheet pile 3. 8, the joint 5 of the steel sheet pile 3 is difficult to separate from the space 7 formed by the angle steel 10 and the flange 2b.

図11(b)に示す接続態様では、図8(a)に示す接続態様と同様に、半割の溝形鋼6の一方の端部が鋼矢板3の継手5の凹部に入り込むように、他方の端部(半割で形成された端部)をH形状鋼部材2のウェブ2aの下端に溶接で固定しているので、鋼矢板3の継手5は、溝形鋼6とフランジ2bで形成される空間7から離脱し難い。   In the connection mode shown in FIG. 11 (b), as in the connection mode shown in FIG. 8 (a), one end of the half-grooved steel 6 enters the recess of the joint 5 of the steel sheet pile 3. Since the other end (the end formed in half) is fixed to the lower end of the web 2a of the H-shaped steel member 2 by welding, the joint 5 of the steel sheet pile 3 is formed by the channel steel 6 and the flange 2b. It is difficult to leave the formed space 7.

図12に、鋼矢板の継手が壁体方向に動いた際に、接触点を増やし、鋼部材のフランジと形鋼で形成される空間から離脱し難くする態様を示す。図12(a)に、鋼矢板の一方の継手を上記空間から離脱し難くする態様を示し、図12(b)に、鋼矢板の他方の継手を上記空間から離脱し難くする態様を示す。   FIG. 12 shows a mode in which, when the steel sheet pile joint moves in the direction of the wall body, the contact point is increased to make it difficult to separate from the space formed by the flange of the steel member and the shape steel. FIG. 12 (a) shows an aspect in which one joint of the steel sheet pile is difficult to be detached from the space, and FIG. 12 (b) shows an aspect in which the other joint of the steel sheet pile is difficult to separate from the space.

図12(a)及び図12(b)に示すように、鋼部材のフランジ2bには、空間7を形成する溝形鋼6の一方の端部6a(鋼部材のフランジ2bと開口部を形成する端部)の下方に継手離脱防止材13が配置されている。   As shown in FIGS. 12 (a) and 12 (b), the flange 2b of the steel member is formed with one end 6a (the flange 2b of the steel member and an opening) of the grooved steel 6 forming the space 7. The joint detachment preventing member 13 is disposed below the end portion).

離脱防止材を設置することで、壁体方向に継手が動いた際に、空間内から継手が離脱しようとするのに抵抗する接触点が増える。壁体方向に作用する力が、形鋼と離脱防止材に分散されることで、形鋼に発生する応力が低減されるので、形鋼が変形することによる離間距離の開きが発生し難くなる。   By installing the disengagement prevention material, when the joint moves in the direction of the wall body, the number of contact points that resist the joint trying to disengage from the space increases. Since the force acting in the direction of the wall is distributed between the shape steel and the anti-separation material, the stress generated in the shape steel is reduced, so that it is difficult for the separation distance to open due to deformation of the shape steel. .

よって、離脱防止材がない場合に比べて継手が抜け難い構造となる。特に、鋼矢板のアーム下面から継手が飛び出す場合の鋼矢板の継手に対して有効となる。   Therefore, it becomes a structure in which the joint is hard to come off compared to the case where there is no separation preventing material. In particular, this is effective for a steel sheet pile joint when the joint protrudes from the lower surface of the arm of the steel sheet pile.

形鋼、板状、又は、多角形状に折り曲げたプレートの端部と、離脱防止材との離間距離a''は、下記式で設定される。   The separation distance a ″ between the end portion of the plate bent into a shape steel, a plate shape, or a polygonal shape and the separation preventing material is set by the following equation.

t<a''<h’
t:アーム板厚
h’:アーム下面から継手上部端までの距離
離間距離a''は、鋼矢板のアーム5aが入る間隔を確保するためにアーム5aの板厚以上とし、継手5が壁体方向に動いたときに、形鋼、板状、又は、多角形状に折り曲げたプレートの固定していない端部6aと継手5とが確実に接触する高さに抑える。
t <a ''<h'
t: arm plate thickness h ′: distance from the arm lower surface to the joint upper end The separation distance a ″ is equal to or greater than the plate thickness of the arm 5a in order to secure a space for the steel sheet pile arm 5a to enter. When it moves in the direction, it is suppressed to a height at which the unfixed end portion 6a and the joint 5 of the plate bent into a shape, plate, or polygon are in contact with each other.

図13に、鋼矢板の継手が、鋼部材のフランジと形鋼で形成される空間から離脱し難くする別の態様を示す。鋼部材のフランジ2bとリップ付溝形鋼9で空間7が形成されている場合で、鋼矢板の継手5とアーム5aの連結部に突起14が形成されている。突起14と溝形鋼9のリップ部9aとの引っ掛かりで、継手5の空間7からの離脱を防止する。   FIG. 13 shows another aspect in which the steel sheet pile joint is difficult to separate from the space formed by the flange of the steel member and the shape steel. In the case where the space 7 is formed by the flange 2b of the steel member and the grooved steel 9 with the lip, the projection 14 is formed at the connecting portion between the joint 5 of the steel sheet pile and the arm 5a. By the catch between the protrusion 14 and the lip portion 9 a of the channel steel 9, the joint 5 is prevented from being detached from the space 7.

突起14を、壁体直交方向に、継手高さを増すように設置することで、形鋼、板状、又は、多角形状に折り曲げたプレートの固定していない端部と接触できる長さを確保できるので、より継手が空間内から離脱し難くなる。   By installing the protrusion 14 in the direction orthogonal to the wall body so as to increase the height of the joint, a length that allows contact with the unfixed end of the plate bent into a steel plate, plate shape, or polygonal shape is secured. This makes it more difficult for the joint to be detached from the space.

リップ付溝形鋼とリップなし溝形鋼を、鋼部材のフランジに対して同角度で取り付けた場合、リップの長さがある分、リップ付溝形鋼のほうが、離間距離を小さくすることができる。また、リップ突起との引っ掛かりも期待できるので、リップを付けた形鋼やプレートを使用するのが好ましい。   When the lip channel steel and the lipless channel steel are mounted at the same angle with respect to the flange of the steel member, the distance between the lip channel steel and the lip channel steel can be reduced because of the length of the lip. it can. In addition, since it can be expected to be caught with the lip protrusion, it is preferable to use a shape steel or plate with a lip attached.

さらに、継手離脱防止材13を併用すると、継手が壁体方向に抜け出そうとするのに抵抗する接触点が増えるので、継手の離脱をより効果的に防止することができる。   Furthermore, when the joint disengagement preventing material 13 is used in combination, the contact point that resists the joint trying to escape in the direction of the wall body increases, so that the disengagement of the joint can be more effectively prevented.

図14に、鋼矢板のアーム下面、又は、継手の下面の壁体直交方向への投影面が、鋼部材フランジ上面と重なる範囲を持つような、形鋼、板状、又は、多角形状に折り曲げたプレートの位置態様を示す。   In FIG. 14, the bottom surface of the arm of the steel sheet pile or the projection surface of the bottom surface of the joint in the direction perpendicular to the wall body is folded into a shape steel, a plate shape, or a polygonal shape so as to overlap the upper surface of the steel member flange. The position of the plate is shown.

図14に示す空間は、溝形鋼6で形成する空間7であるが、溝形鋼6の固定していない端部6aが、鋼部材のフランジ2bの端から引いた板厚方向の垂線2cより、ウェブ側(図示なし)に収まるように、溝形鋼6の一方の端部6bが鋼部材のフランジ2bに固定されている。   The space shown in FIG. 14 is a space 7 formed by the channel steel 6, but the end 6a where the channel steel 6 is not fixed is a perpendicular 2c in the thickness direction drawn from the end of the flange 2b of the steel member. Thus, one end 6b of the channel steel 6 is fixed to the flange 2b of the steel member so as to fit on the web side (not shown).

このように空間を形成することで、鋼矢板の壁体直交方向の凹側向きに水平荷重が作用した場合に、鋼矢板のアーム下面、又は、継手の下面と、鋼部材のフランジ上面2b'が接触部6cを持つようになる。鋼矢板に作用する上記水平荷重は、この接触部6cを通じて鋼部材に伝達されるので、鋼矢板に予期せぬ水平荷重が作用しても、接続部は、接続部としての機能を果たし、壁体構造は維持される。   By forming a space in this way, when a horizontal load is applied toward the concave side in the direction perpendicular to the wall of the steel sheet pile, the lower surface of the arm of the steel sheet pile or the lower surface of the joint, and the upper surface 2b ′ of the flange of the steel member Has a contact portion 6c. Since the horizontal load acting on the steel sheet pile is transmitted to the steel member through this contact portion 6c, even if an unexpected horizontal load acts on the steel sheet pile, the connection portion functions as a connection portion, and the wall Body structure is maintained.

また、継手5が壁体方向に動いた際には、形鋼、板状、又は、多角形状に折り曲げたプレートの固定していない端部6aが、鋼矢板の継手5と接触点を持つようになるので、形鋼、板状、又は、多角形状に折り曲げたプレートが変形しない限り、壁体方向への継手5の抜け出しを防止することができる。   Further, when the joint 5 moves in the direction of the wall body, the unfixed end portion 6a of the plate bent into the shape steel, the plate shape, or the polygonal shape has a contact point with the joint 5 of the steel sheet pile. Therefore, as long as the plate bent in the shape steel, plate shape, or polygonal shape is not deformed, it is possible to prevent the joint 5 from coming out in the direction of the wall body.

形鋼又はプレートと鋼部材のフランジで形成される空間を活用して、止水性の確認や環境影響物質の調査を行うことができる。   By utilizing the space formed by the shape steel or the plate and the flange of the steel member, it is possible to check the water stoppage and investigate the environmental impact substances.

擁壁に止水性が求められる場合は、上記空間の内部に、止水材(例えば、モルタル、膨張性止水材等)を充填して、擁壁全体の止水性を確保する。   When the retaining wall is required to be water-tight, the space is filled with a water-stopping material (for example, mortar, inflatable water-stopping material, etc.) to ensure water-stopping of the entire retaining wall.

ここで、本発明構築方法で構築した擁壁に作用する土圧と水圧の関係について説明する。図15に、共用時、擁壁に作用する土圧と水圧の関係を示し、図16に、仮設時、擁壁に作用する土圧と水圧の関係を示す。   Here, the relationship between the earth pressure acting on the retaining wall constructed by the construction method of the present invention and the water pressure will be described. FIG. 15 shows the relationship between earth pressure and water pressure acting on the retaining wall at the time of common use, and FIG. 16 shows the relationship between earth pressure and water pressure acting on the retaining wall at the time of temporary installation.

図15に示すように、共用時には、水圧に対して土圧のほうが大きいため、鋼矢板3の移動方向は海側に限定される(下に向く矢印、参照)。掘削土留めやタイロッド取り付けなどの仮設利用時には、図16に示すように、表層土の掘削により作用する土圧が減少するので、場合によっては、水圧のほうが大きくなり、鋼矢板は、陸側に鋼矢板が移動することもある。   As shown in FIG. 15, since the earth pressure is larger than the water pressure at the time of sharing, the moving direction of the steel sheet pile 3 is limited to the sea side (refer to the arrow pointing downward). At the time of temporary use such as excavation earth retaining or tie rod attachment, as shown in Fig. 16, the earth pressure acting by excavation of the surface soil decreases, so in some cases the water pressure becomes larger, and the steel sheet pile is on the land side. Steel sheet piles may move.

擁壁としての機能を充分に発揮させるため、鋼矢板の継手は、確実に、形鋼又はプレートと鋼部材のフランジで形成される空間内に収まる必要がある。   In order to fully exhibit the function as the retaining wall, the steel sheet pile joint needs to be surely fit in the space formed by the shape steel or the plate and the flange of the steel member.

次に、本発明の実施例について説明するが、実施例での条件は、本発明の実施可能性及び効果を確認するために採用した一条件例であり、本発明は、この一条件例に限定されるものではない。本発明は、本発明の要旨を逸脱せず、本発明の目的を達成する限りにおいて、種々の条件を採用し得るものである。   Next, examples of the present invention will be described. The conditions in the examples are one example of conditions used for confirming the feasibility and effects of the present invention, and the present invention is based on this one example of conditions. It is not limited. The present invention can adopt various conditions as long as the object of the present invention is achieved without departing from the gist of the present invention.

(実施例)
H形状鋼部材としてH形鋼(親杭)を用い、図6(a)に示すように、H形鋼のフランジの両側に溝形鋼を溶接して固定し、ハット形鋼矢板の継手を収容できる空間を、フランジの領域内に収まるように形成した。
(Example)
Using H-shaped steel (parent pile) as the H-shaped steel member, as shown in Fig. 6 (a), the groove-shaped steel is welded and fixed to both sides of the flange of the H-shaped steel, and the joint of the hat-shaped steel sheet pile is The space that can be accommodated was formed to fit within the area of the flange.

試験ヤードにて親杭を所定の間隔をおいて打設し、親杭の間に、ハット形鋼矢板を打設した。ハット形鋼矢板の打設時、継手と溝形鋼とのせりやハット形鋼矢板の高止まりは発生せず、また、継手が上記空間から離脱することもなかった。同時に実施した既往のコネクターで継手を嵌合させた場合と比較すると、継手のせりがないため、施工時間を短縮することができた。   In the test yard, the parent pile was driven at a predetermined interval, and a hat-shaped steel sheet pile was driven between the parent piles. At the time of placing the hat-shaped steel sheet pile, the joint and the groove-shaped steel did not occur, and the hat-shaped steel sheet pile did not stop at a high level, and the joint did not leave the space. Compared with the case where the joint was fitted with the existing connector that was performed at the same time, the construction time could be shortened because there was no joint slip.

前述したように、本発明によれば、鋼部材のフランジ又はウェブに形鋼又はプレートを固定して形成した空間内で、鋼矢板の継手が自由に動くものの、離脱しないので、鋼部材や鋼矢板の打設精度が悪くても、継手のせりや高止まりを発生させずに擁壁を構築することができる。   As described above, according to the present invention, the steel sheet pile joint moves freely in the space formed by fixing the shape steel or the plate to the flange or web of the steel member, but does not detach, so the steel member or steel Even if the sheet pile placement accuracy is poor, it is possible to construct the retaining wall without causing a joint or a high stop.

また、形鋼又はプレートは入手し易い部材であり、そのまま鋼部材のフランジ又はウェブに溶接で固定して所要の空間を形成できるので、加工の手間が省け、材料費及び加工費を低減できる。よって、本発明は、土木・建築産業において、利用可能性が高いものである。   In addition, the shape steel or the plate is an easily available member, and can be fixed to the flange or web of the steel member by welding as it is to form a required space, so that the labor of processing can be saved and the material cost and processing cost can be reduced. Therefore, the present invention has high applicability in the civil engineering and construction industries.

1 コネクター
2 H形状鋼部材
2a ウェブ
2b フランジ
2b' フランジ上面
2c 垂線
3 鋼矢板
3a フランジ
4 鋼管
4a スリット
5 継手
5' 継手下面
5a アーム
5a' アーム下面
6 溝形鋼
6a、6b 端部
6c 接触部
7 空間
7a 鋼部材のフランジ及び/又はウェブの面
7b 形鋼、板状、又は、多角形状に折り曲げたプレートの内面
7c 形鋼、板状、又は、多角形状に折り曲げたプレートの固定していない端部から鋼部材のフランジの面に下ろした垂線
7d 壁体直交方向への投影面
7e 投影面と重なる範囲
8 溶接
9 リップ付溝形鋼
9a リップ部
10 山形鋼
11 半割れ鋼管
12 プレート
13 継手離脱防止材
14 突起
a、a' 離間距離
a'' 離脱防止材との離間距離
t アーム板厚
h アーム上面までの継手高さ
h’ アーム下面から継手上部端までの距離
hmax 継手の最大高さ
DESCRIPTION OF SYMBOLS 1 Connector 2 H-shaped steel member 2a Web 2b Flange 2b 'Flange upper surface 2c Perpendicular 3 Steel sheet pile 3a Flange 4 Steel pipe 4a Slit 5 Joint 5' Joint lower surface 5a Arm 5a 'Arm lower surface 6 Channel steel 6a, 6b End 6c Contact part 7 Space 7a Flange of steel member and / or surface of web 7b Inner surface of plate bent in shape steel, plate shape or polygonal shape 7c Unfixed plate bent in shape steel, plate shape or polygonal shape Vertical line descending from the end to the flange surface of the steel member 7d Projection surface in the direction perpendicular to the wall 7e Range overlapping the projection surface 8 Welding 9 Grooved steel with lip 9a Lip part 10 Angle steel 11 Half cracked steel pipe 12 Plate 13 Joint Detachment prevention material 14 Protrusion a, a 'Separation distance a''Separation distance from separation prevention material t Arm plate thickness h Joint height to arm upper surface h' Maximum height of the distance hmax joint from over arm lower surface to the joint upper end

Claims (10)

鋼部材と鋼矢板を接続して擁壁を構成する部材において、
(i)鋼部材のフランジ又はウェブに、形鋼、板状、又は、多角形状に折り曲げたプレートを固定して、鋼矢板の継手を収容し得る空間を形成し、
(ii)上記空間の内部に、鋼矢板を打設しながら継手を入れ込むことで、継手同士の嵌合なしに鋼部材と鋼矢板を接続する
ことを特徴とする擁壁構成部材。
In the member that constitutes the retaining wall by connecting the steel member and the steel sheet pile,
(I) A plate that is bent in a shape steel, a plate shape, or a polygonal shape is fixed to a flange or web of a steel member to form a space that can accommodate a steel sheet pile joint,
(Ii) A retaining wall constituting member characterized in that a steel member and a steel sheet pile are connected without fitting between the joints by inserting the joint into the space while placing the steel sheet pile.
前記鋼部材がH形状鋼部材であることを特徴とする請求項1に記載の擁壁構成部材。   The retaining wall constituting member according to claim 1, wherein the steel member is an H-shaped steel member. 前記形鋼、板状、又は、多角形状に折り曲げたプレートを、鋼部材のフランジ又はウェブの面から角度をつけて固定したことを特徴とする請求項1又は2に記載の擁壁構成部材。   The retaining wall constituting member according to claim 1 or 2, wherein the plate bent in the shape steel, plate shape, or polygonal shape is fixed at an angle from the surface of the flange or web of the steel member. 前記形鋼、板状、又は、多角形状に折り曲げたプレートの固定していない外端部が、鋼部材のフランジ端から引いた板厚方向の垂線より、鋼部材のフランジ側に収まることを特徴とする請求項1〜3のいずれか1項に記載の擁壁構成部材。   The non-fixed outer end portion of the plate bent in the shape steel, plate shape, or polygonal shape fits on the flange side of the steel member from the perpendicular in the plate thickness direction drawn from the flange end of the steel member. The retaining wall constituting member according to any one of claims 1 to 3. 前記形鋼が、H形鋼、溝形鋼、山形鋼のいずれかであることを特徴とする請求項1〜4のいずれか1項に記載の擁壁構成部材。   The retaining wall constituting member according to any one of claims 1 to 4, wherein the shape steel is any one of an H-shaped steel, a grooved steel, and an angle steel. 鋼矢板のアーム下面、又は、継手の下面の壁体直交方向への投影面が、鋼部材のフランジ上面と重なる範囲を持つように、前記形鋼、板状、又は、多角形状に折り曲げたプレートの固定していない端部と鋼部材フランジとの離間距離を設定したことを特徴とする請求項1〜5のいずれか1項に記載の擁壁構成部材。   Plate bent in the shape steel, plate shape, or polygonal shape so that the projection surface of the lower surface of the arm of the steel sheet pile or the lower surface of the joint in the direction perpendicular to the wall body overlaps the upper surface of the flange of the steel member The retaining wall constituting member according to any one of claims 1 to 5, wherein a separation distance between the end portion of the steel member and the steel member flange is set. 前記形鋼又はプレートを固定した鋼部材のフランジの端部に、鋼矢板の継手が前記空間から離脱するのを防止する離脱防止材を設けたことを特徴とする請求項1〜6のいずれか1項に記載の擁壁構成部材。   The separation prevention material which prevents that the joint of a steel sheet pile leaves | separates from the said space was provided in the edge part of the flange of the steel member which fixed the said shape steel or plate. The retaining wall constituent member according to Item 1. 前記鋼矢板の継手に、該継手が前記空間から離脱するのを防止する突起を設けたことを特徴とする請求項1〜7のいずれか1項に記載の擁壁構成部材。   The retaining wall constituting member according to any one of claims 1 to 7, wherein a protrusion for preventing the joint from being separated from the space is provided on the joint of the steel sheet pile. 前記鋼部材のフランジ又はウェブと、固定した形鋼又はプレートで形成する空間の内部にモルタルを詰めたことを特徴とする請求項1〜8のいずれか1項に記載の擁壁構成部材。   The retaining wall constituting member according to any one of claims 1 to 8, wherein mortar is packed in a space formed by a flange or web of the steel member and a fixed shape steel or plate. 鋼部材と鋼矢板を接続して擁壁を構築する方法において、
(i)鋼部材のフランジ又はウェブに、形鋼、板状、又は、多角形状に折り曲げたプレートを固定して、鋼矢板の継手を収容し得る空間を形成し、
(ii)上記空間の内部に、鋼矢板を打設しながら継手を入れ込むことで、継手同士の嵌合なしに鋼部材と鋼矢板を接続する
ことを特徴とする擁壁の構築方法。
In the method of building a retaining wall by connecting a steel member and a steel sheet pile,
(I) A plate that is bent in a shape steel, a plate shape, or a polygonal shape is fixed to a flange or web of a steel member to form a space that can accommodate a steel sheet pile joint,
(Ii) A method for constructing a retaining wall, wherein a steel member and a steel sheet pile are connected to each other without fitting between the joints by inserting the joint into the space while placing the steel sheet pile.
JP2013219511A 2013-10-22 2013-10-22 Retaining wall construction member and construction method thereof Pending JP2015081435A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016198342A (en) * 2015-04-13 2016-12-01 京楽産業.株式会社 Game machine
JP2016198343A (en) * 2015-04-13 2016-12-01 京楽産業.株式会社 Game machine

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JPS537905A (en) * 1976-07-08 1978-01-24 Tekken Constr Co Ware of joining steel sheet pile and method of connecting steel sheet pile
JPH0941364A (en) * 1995-05-23 1997-02-10 Nippon Steel Corp Fitting joint structure having high strength and high rigidity
JP2005256571A (en) * 2004-03-15 2005-09-22 Fukuda Corp Continuous wall body and its construction method
JP2009263873A (en) * 2008-04-22 2009-11-12 Nippon Steel Corp Member for continuous underground wall, continuous underground wall, and method of constructing continuous underground wall

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS537905A (en) * 1976-07-08 1978-01-24 Tekken Constr Co Ware of joining steel sheet pile and method of connecting steel sheet pile
JPH0941364A (en) * 1995-05-23 1997-02-10 Nippon Steel Corp Fitting joint structure having high strength and high rigidity
JP2005256571A (en) * 2004-03-15 2005-09-22 Fukuda Corp Continuous wall body and its construction method
JP2009263873A (en) * 2008-04-22 2009-11-12 Nippon Steel Corp Member for continuous underground wall, continuous underground wall, and method of constructing continuous underground wall

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016198342A (en) * 2015-04-13 2016-12-01 京楽産業.株式会社 Game machine
JP2016198343A (en) * 2015-04-13 2016-12-01 京楽産業.株式会社 Game machine

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