JP7441688B2 - Stainless steel sheet pile construction equipment and stainless steel sheet pile wall construction method - Google Patents

Stainless steel sheet pile construction equipment and stainless steel sheet pile wall construction method Download PDF

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JP7441688B2
JP7441688B2 JP2020042797A JP2020042797A JP7441688B2 JP 7441688 B2 JP7441688 B2 JP 7441688B2 JP 2020042797 A JP2020042797 A JP 2020042797A JP 2020042797 A JP2020042797 A JP 2020042797A JP 7441688 B2 JP7441688 B2 JP 7441688B2
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stainless steel
steel sheet
sheet pile
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rust
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JP2021143519A (en
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雄充 藤本
範寛 大高
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Nippon Steel Metal Products Co Ltd
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Description

本発明は、ステンレス鋼矢板の施工装置およびステンレス鋼矢板壁の施工方法に関する。 The present invention relates to a stainless steel sheet pile construction apparatus and a stainless steel sheet pile wall construction method.

従来、鋼矢板は普通鋼製であった。普通鋼製の鋼矢板を地中に打設する際に用いられる治具や施工方法は、種々提案されている。例えば特許文献1には、鋼矢板の表面に形成された腐食防止用の塗料や被膜などの損傷を防ぐために、表面がフラットな鋼板で鋼矢板を挟持する技術が記載されている。特許文献2には、杭圧入引抜機のドラムの接触による鋼矢板の変形を防止するために、鋼矢板のフランジの基部を内側から支持して変形を防止するための金属製のピースを設ける技術が記載されている。 Conventionally, steel sheet piles were made of ordinary steel. Various jigs and construction methods have been proposed for use in driving ordinary steel sheet piles into the ground. For example, Patent Document 1 describes a technique in which a steel sheet pile is held between flat steel plates in order to prevent damage to anti-corrosion paint or coating formed on the surface of the steel sheet pile. Patent Document 2 describes a technique in which a metal piece is provided to support the base of the flange of the steel sheet pile from the inside to prevent deformation, in order to prevent the steel sheet pile from being deformed due to contact with the drum of a pile press-in/extraction machine. is listed.

実開平1-79632号公報Utility Model Publication No. 1-79632 特開平11-350486号公報Japanese Patent Application Publication No. 11-350486

本発明者らは、上記の通り従来は普通鋼製であった鋼矢板を、ステンレス鋼製とする技術を開発した。鋼矢板をステンレス鋼製とすることによって、鋼矢板の腐食や表面錆を防止でき、耐久性および外観に優れた鋼矢板壁を構築することができる。 As mentioned above, the present inventors have developed a technique for making steel sheet piles, which were conventionally made from ordinary steel, from stainless steel. By making the steel sheet piles made of stainless steel, corrosion and surface rust of the steel sheet piles can be prevented, and a steel sheet pile wall with excellent durability and appearance can be constructed.

しかしながら、普通鋼などの防錆性のない金属を接触させてステンレス鋼矢板を挟持した場合、ステンレス鋼矢板の表面に錆が付着し、さらにその錆からステンレス鋼矢板自体にも腐食が発生する、もらい錆と呼ばれる現象が生じる。 However, if stainless steel sheet piles are sandwiched between metals that do not have rust prevention properties, such as ordinary steel, rust will adhere to the surface of the stainless steel sheet piles, and the rust will also cause corrosion to the stainless steel sheet piles themselves. A phenomenon called rust occurs.

上述したような従来の技術では、挟持部材の形状やピースの設置によって鋼矢板の表面塗膜の損傷や変形が防止されているものの、そのための挟持部材やピースの材質については鋼製、または金属製とされているため、上記のもらい錆を防止することはできない。 In the conventional technology described above, damage and deformation of the surface coating film of steel sheet piles are prevented by the shape of the clamping members and the installation of the pieces, but the materials of the clamping members and pieces for this purpose are made of steel or metal. Because it is made of aluminum, it is not possible to prevent the above-mentioned rust.

そこで、本発明は、ステンレス鋼矢板を地中に打設して鋼矢板壁を構築するにあたり、もらい錆を防止して耐久性や外観を維持することができるステンレス鋼矢板の施工装置およびステンレス鋼矢板壁の施工方法を提供することを目的とする。 Therefore, the present invention provides a construction device for stainless steel sheet piles that can prevent rust and maintain durability and appearance when constructing steel sheet pile walls by driving stainless steel sheet piles into the ground, and The purpose is to provide a construction method for sheet pile walls.

[1]ステンレス鋼矢板を挟持する挟持手段と、少なくともステンレス鋼矢板に接触する挟持手段の表面に配置され、防錆性を有する材料で形成された保護部材とを備える、ステンレス鋼矢板の施工装置。
[2]保護部材は、挟持手段の表面とステンレス鋼矢板との間に介挿される板状部材である、[1]に記載のステンレス鋼矢板の施工装置。
[3]保護部材は、ステンレス鋼で形成される、[1]または[2]に記載のステンレス鋼矢板の施工装置。
[4]挟持手段は、バイブロハンマのチャックである、[1]から[3]のいずれか1項に記載のステンレス鋼矢板の施工装置。
[5]防錆性を有する材料で形成された保護部材をステンレス鋼矢板に接触させながら、ステンレス鋼矢板を挟持する工程と挟持されたステンレス鋼矢板に鉛直方向の荷重を加えて地中に打設する工程とを含む、ステンレス鋼矢板壁の施工方法。
[6]ステンレス鋼矢板を挟持する工程は、ステンレス鋼矢板を挟持する挟持手段とステンレス鋼矢板との間に板状の保護部材を介挿する工程を含む、[5]に記載のステンレス鋼矢板壁の施工方法。
[1] A construction device for stainless steel sheet piles, comprising a clamping means for clamping the stainless steel sheet piles, and a protective member made of a rust-proof material and arranged on the surface of the clamping means that contacts at least the stainless steel sheet piles. .
[2] The stainless steel sheet pile construction apparatus according to [1], wherein the protection member is a plate-shaped member inserted between the surface of the clamping means and the stainless steel sheet pile.
[3] The stainless steel sheet pile construction apparatus according to [1] or [2], wherein the protection member is made of stainless steel.
[4] The stainless steel sheet pile construction apparatus according to any one of [1] to [3], wherein the clamping means is a vibrohammer chuck.
[5] The process of clamping the stainless steel sheet pile while bringing a protective member made of a rust-proof material into contact with the stainless steel sheet pile, and applying a vertical load to the clamped stainless steel sheet pile and driving it into the ground. A method of constructing a stainless steel sheet pile wall, including the process of installing a stainless steel sheet pile wall.
[6] The stainless steel sheet pile according to [5], wherein the step of clamping the stainless steel sheet pile includes a step of inserting a plate-shaped protection member between the clamping means that clamps the stainless steel sheet pile and the stainless steel sheet pile. How to construct a wall.

上記の構成によれば、防錆性を有する材料で形成された保護部材をステンレス鋼矢板に接触させて打設するため、打設時におけるステンレス鋼矢板のもらい錆を防止し、耐久性や外観を維持することができる。 According to the above configuration, since the protective member made of a rust-preventive material is placed in contact with the stainless steel sheet pile, it is possible to prevent the stainless steel sheet pile from becoming rusty during driving, thereby improving durability and appearance. can be maintained.

本発明の一実施形態に係るステンレス鋼矢板を用いた鋼矢板壁の施工装置の例を示す図である。It is a figure showing an example of the construction device of the steel sheet pile wall using the stainless steel sheet pile concerning one embodiment of the present invention. 図1に示すバイブロハンマの断面図である。FIG. 2 is a cross-sectional view of the vibrohammer shown in FIG. 1. FIG. 図1に示すバイブロハンマの断面図である。FIG. 2 is a cross-sectional view of the vibrohammer shown in FIG. 1. FIG. 変形例に係るバイブロハンマの断面図である。It is a sectional view of a vibro hammer concerning a modification. 変形例に係るバイブロハンマの断面図である。It is a sectional view of a vibro hammer concerning a modification.

以下に添付図面を参照しながら、本発明の好適な実施形態について詳細に説明する。なお、本明細書および図面において、実質的に同一の機能構成を有する構成要素については、同一の符号を付することにより重複説明を省略する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Note that, in this specification and the drawings, components having substantially the same functional configurations are designated by the same reference numerals and redundant explanation will be omitted.

図1は、本発明の一実施形態に係るステンレス鋼矢板を用いた鋼矢板壁の施工装置の例を示す図である。図示された例において、施工装置は、クレーン1によって地表から所定の高さに吊り上げられたバイブロハンマ2を含む。バイブロハンマ2は、チャック21でステンレス鋼矢板3を挟持し、チャック21に鉛直方向の振動荷重を加えることによってステンレス鋼矢板3を地中に打設する。 FIG. 1 is a diagram showing an example of a construction device for a steel sheet pile wall using stainless steel sheet piles according to an embodiment of the present invention. In the illustrated example, the construction device includes a vibrohammer 2 lifted from the ground to a predetermined height by a crane 1. The vibro hammer 2 clamps the stainless steel sheet pile 3 with a chuck 21 and applies a vertical vibration load to the chuck 21 to drive the stainless steel sheet pile 3 into the ground.

図2Aおよび図2Bは、図1に示すバイブロハンマの断面図である。図2Bは図2AのB-B線に沿った断面図であり、図2Aは図2BのA-A線に沿った断面図である。図示された例において、バイブロハンマ2は、チャック21と、シリンダ22と、フレーム23とを含む。チャック21およびシリンダ22はフレーム23によって支持され、シリンダ22を駆動させることによってチャック21の挟持面211,212の間にステンレス鋼矢板3を挟持することができる。挟持面211,212には鋼矢板との間での滑りを防止するために凹凸が形成されている。 2A and 2B are cross-sectional views of the vibrohammer shown in FIG. 1. 2B is a sectional view taken along line BB in FIG. 2A, and FIG. 2A is a sectional view taken along line AA in FIG. 2B. In the illustrated example, the vibrohammer 2 includes a chuck 21, a cylinder 22, and a frame 23. The chuck 21 and the cylinder 22 are supported by a frame 23, and by driving the cylinder 22, the stainless steel sheet pile 3 can be held between the holding surfaces 211, 212 of the chuck 21. The holding surfaces 211 and 212 are provided with unevenness to prevent slipping between them and the steel sheet piles.

上記のようなバイブロハンマ2において、チャック21は一般に普通鋼、すなわち炭素鋼で形成される。普通鋼で形成された挟持面211,212が直接的にステンレス鋼矢板3に接触すると、挟持面211,212に生じている錆がステンレス鋼矢板3の表面にも付着して外観を損ねるのに加え、錆が付着した部分で酸化被膜が機能せず、結果としてステンレス鋼矢板3自体にも腐食が発生する、もらい錆と呼ばれる現象が生じる。ステンレス鋼矢板3は、一般に耐久性や外観に優れていることを利点とするが、打設時に発生するもらい錆はこの利点を損ねる。 In the vibro hammer 2 as described above, the chuck 21 is generally made of ordinary steel, that is, carbon steel. If the clamping surfaces 211, 212 made of ordinary steel come into direct contact with the stainless steel sheet pile 3, the rust generated on the clamping surfaces 211, 212 will also adhere to the surface of the stainless steel sheet pile 3, damaging its appearance. In addition, the oxide film does not function in areas where rust has adhered, and as a result, corrosion occurs in the stainless steel sheet pile 3 itself, a phenomenon called scalloped rust. Stainless steel sheet piles 3 generally have the advantage of being excellent in durability and appearance, but the rust that occurs during pouring impairs these advantages.

そこで、本実施形態では、ステンレス鋼矢板3に接触するチャック21の挟持面211,212に保護部材としてステンレス鋼板41,42を配置する。チャック21がステンレス鋼板41,42を介してステンレス鋼矢板3を挟持することによって、普通鋼で形成された挟持面211,212に生じている錆がステンレス鋼板41,42には付着するもののステンレス鋼矢板3には付着せず、結果としてステンレス鋼矢板3のもらい錆を防止することができる。 Therefore, in this embodiment, stainless steel plates 41 and 42 are arranged as protective members on the clamping surfaces 211 and 212 of the chuck 21 that contact the stainless steel sheet pile 3. As the chuck 21 clamps the stainless steel sheet pile 3 via the stainless steel plates 41 and 42, the rust generated on the clamping surfaces 211 and 212 made of ordinary steel will adhere to the stainless steel plates 41 and 42, but the stainless steel It does not adhere to the sheet piles 3, and as a result, the stainless steel sheet piles 3 can be prevented from becoming rusty.

本実施形態では、ステンレス鋼矢板3を地中に打設して鋼矢板壁を形成するときに、ステンレス鋼板41,42をステンレス鋼矢板3に接触させながら、ステンレス鋼板41,42の外側からチャック21でステンレス鋼矢板3を挟持する。このとき、例えば人手でチャック21の挟持面211,212とステンレス鋼矢板3との間にステンレス鋼板41,42を介挿してもよい。あるいは、予め挟持面211,212にステンレス鋼板41,42を固定しておいてもよい。人手による場合は設備構成が単純化され、予め固定する場合は人手による工程を省略することができる。 In this embodiment, when driving the stainless steel sheet pile 3 into the ground to form a steel sheet pile wall, the stainless steel sheets 41 and 42 are held in contact with the stainless steel sheet pile 3 while being chucked from the outside of the stainless steel sheets 41 and 42. 21 clamps the stainless steel sheet pile 3. At this time, the stainless steel plates 41 and 42 may be manually inserted between the clamping surfaces 211 and 212 of the chuck 21 and the stainless steel sheet pile 3, for example. Alternatively, the stainless steel plates 41 and 42 may be fixed to the clamping surfaces 211 and 212 in advance. If it is done manually, the equipment configuration is simplified, and if it is fixed in advance, the manual process can be omitted.

図3Aおよび図3Bは、変形例に係るバイブロハンマの断面図である。図3Bは図3AのB-B線に沿った断面図であり、図3Aは図3BのA-A線に沿った断面図である。図示された例では、上記の例と異なり、ステンレス鋼板41A,42Aが、挟持面211,212に形成された凹凸に沿った形状を有し、ステンレス鋼板41A,42Aのステンレス鋼矢板3に接触する面にも凹凸が形成される。これによって、挟持面211,212とステンレス鋼板41A,42Aとも間、およびステンレス鋼板41A,42Aとステンレス鋼矢板3との間での滑りをより確実に防止することができる。 3A and 3B are cross-sectional views of a vibro hammer according to a modified example. 3B is a sectional view taken along line BB in FIG. 3A, and FIG. 3A is a sectional view taken along line AA in FIG. 3B. In the illustrated example, unlike the above example, the stainless steel plates 41A, 42A have shapes that follow the unevenness formed on the clamping surfaces 211, 212, and the stainless steel plates 41A, 42A contact the stainless steel sheet pile 3. Irregularities are also formed on the surface. This can more reliably prevent slipping between the clamping surfaces 211, 212 and the stainless steel plates 41A, 42A, and between the stainless steel plates 41A, 42A and the stainless steel sheet pile 3.

他の例では、ステンレス鋼板の挟持面211,212側の面を図3Aおよび図3Bの例と同様に挟持面211,212に形成された凹凸に沿った形状にし、ステンレス鋼矢板3側の面を図2Aおよび図2Bの例と同様に平坦にしてもよい。あるいは、ステンレス鋼板とステンレス鋼矢板3との間での滑りを防止しつつステンレス鋼矢板3の表面における圧痕を最小化するために、ステンレス鋼板のステンレス鋼矢板3側の面に挟持面211,212に形成された凹凸とは異なる凹凸を形成してもよい。 In another example, the surface of the stainless steel plate on the side of the clamping surfaces 211, 212 is shaped to follow the unevenness formed on the clamping surfaces 211, 212 as in the example of FIGS. 3A and 3B, and the surface of the stainless steel plate on the side of the stainless steel sheet pile 3 may be flattened as in the example of FIGS. 2A and 2B. Alternatively, in order to prevent slippage between the stainless steel plate and the stainless steel sheet pile 3 and to minimize indentations on the surface of the stainless steel sheet pile 3, clamping surfaces 211 and 212 are provided on the surface of the stainless steel plate on the stainless steel sheet pile 3 side. You may form unevenness different from the unevenness formed in .

上記の実施形態ではステンレス鋼矢板3の施工装置としてバイブロハンマ2、ステンレス鋼矢板を挟持する挟持手段としてチャック21を例示したが、チャックの形状は図示された例には限られず、公知のさまざまな形状とすることが可能である。チャックの形状にかかわらず、チャックの挟持面とステンレス鋼矢板との間にステンレス鋼板のような保護部材を介在させることによって、ステンレス鋼矢板のもらい錆を防止することができる。上述のように、保護部材は、チャックの挟持面に予め取り付けられていてもよいし、施工時に挟持面とステンレス鋼矢板との間に介挿されてもよい。あるいは、保護部材を挟持手段の一部に組み込んでもよい。また、バイブロハンマ以外の施工装置、例えば圧入機などを用いる場合にも、ステンレス鋼矢板を挟持する挟持手段のステンレス鋼矢板に接触する表面に保護部材を配置することによって、同様にもらい錆防止の効果が得られる。 In the above embodiment, the vibro hammer 2 is used as the construction device for the stainless steel sheet pile 3, and the chuck 21 is used as the clamping means for clamping the stainless steel sheet pile. However, the shape of the chuck is not limited to the illustrated example, and various known shapes can be used. It is possible to do so. Regardless of the shape of the chuck, by interposing a protective member such as a stainless steel plate between the clamping surface of the chuck and the stainless steel sheet pile, it is possible to prevent the stainless steel sheet pile from becoming rusty. As described above, the protective member may be attached to the clamping surface of the chuck in advance, or may be inserted between the clamping surface and the stainless steel sheet pile during construction. Alternatively, the protective member may be incorporated into a part of the clamping means. In addition, when using construction equipment other than a vibratory hammer, such as a press-in machine, the same effect of rust prevention can be achieved by arranging a protective member on the surface of the clamping means that contacts the stainless steel sheet pile. is obtained.

また、上記の実施形態では保護部材としてステンレス鋼板を例示したが、保護部材はこの例には限られず、防錆性を有する各種材料で形成された任意の形状の部材が利用可能である。例えば、保護部材は、樹脂材料や硬質のゴムで形成されてもよいし、シリコンや木材で形成されてもよい。また、保護部材は、ステンレス鋼矢板に接触する表面が防錆性を有していればよいため、例えば普通鋼の鋼板の表面にめっきや防錆性を有する材料の被覆が形成された物が保護部材として利用されてもよい。 Further, in the above embodiment, a stainless steel plate is used as an example of the protective member, but the protective member is not limited to this example, and members of any shape formed of various rust-proofing materials can be used. For example, the protective member may be made of a resin material or hard rubber, or may be made of silicone or wood. In addition, the protective member only needs to have rust-proofing properties on the surface that comes into contact with the stainless steel sheet piles, so for example, the surface of a common steel plate may be plated or coated with a material that has rust-proofing properties. It may also be used as a protection member.

以上、添付図面を参照しながら本発明の好適な実施形態について詳細に説明したが、本発明はかかる例に限定されない。本発明の属する技術の分野における通常の知識を有する者であれば、請求の範囲に記載された技術的思想の範疇内において、各種の変更例または修正例に想到し得ることは明らかであり、これらについても、当然に本発明の技術的範囲に属するものと了解される。 Although preferred embodiments of the present invention have been described above in detail with reference to the accompanying drawings, the present invention is not limited to such examples. It is clear that a person with ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. It is understood that these also fall within the technical scope of the present invention.

1…クレーン、2…バイブロハンマ、3…ステンレス鋼矢板、41,42,41A,42A…保護部材(ステンレス鋼板)、21…挟持手段(チャック)、211,212…挟持面。 DESCRIPTION OF SYMBOLS 1... Crane, 2... Vibro hammer, 3... Stainless steel sheet pile, 41, 42, 41A, 42A... Protection member (stainless steel plate), 21... Clamping means (chuck), 211, 212... Clamping surface.

Claims (5)

ステンレス鋼矢板を挟持する挟持手段と、
少なくとも前記ステンレス鋼矢板に接触する前記挟持手段の表面に配置され、防錆性を有する材料で形成された保護部材と
を備え
前記保護部材は、ステンレス鋼で形成される、ステンレス鋼矢板の施工装置。
A clamping means for clamping the stainless steel sheet pile;
a protective member disposed on the surface of the clamping means that contacts at least the stainless steel sheet pile and made of a material having rust prevention properties ,
In the stainless steel sheet pile construction device, the protection member is made of stainless steel .
前記保護部材は、前記挟持手段の表面と前記ステンレス鋼矢板との間に介挿される板状部材である、請求項1に記載のステンレス鋼矢板の施工装置。 The stainless steel sheet pile construction apparatus according to claim 1, wherein the protection member is a plate-shaped member inserted between the surface of the holding means and the stainless steel sheet pile. 前記挟持手段は、バイブロハンマのチャックである、請求項1または請求項に記載のステンレス鋼矢板の施工装置。 The stainless steel sheet pile construction apparatus according to claim 1 or 2 , wherein the clamping means is a chuck of a vibrohammer. 防錆性を有する材料で形成された保護部材をステンレス鋼矢板に接触させながら、前記ステンレス鋼矢板を挟持する工程と
前記挟持されたステンレス鋼矢板に鉛直方向の荷重を加えて地中に打設する工程と
を含み、
前記保護部材は、ステンレス鋼で形成される、ステンレス鋼矢板壁の施工方法。
A step of sandwiching the stainless steel sheet pile while bringing a protective member made of a rust-proof material into contact with the stainless steel sheet pile; and driving the pile into the ground by applying a vertical load to the sandwiched stainless steel sheet pile. and the step of
The method for constructing a stainless steel sheet pile wall , wherein the protection member is made of stainless steel .
前記ステンレス鋼矢板を挟持する工程は、前記ステンレス鋼矢板を挟持する挟持手段と前記ステンレス鋼矢板との間に板状の前記保護部材を介挿する工程を含む、請求項に記載のステンレス鋼矢板壁の施工方法。 The stainless steel sheet pile according to claim 4 , wherein the step of holding the stainless steel sheet pile includes a step of inserting the plate-shaped protection member between a holding means that holds the stainless steel sheet pile and the stainless steel sheet pile. Construction method of sheet pile wall.
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004263262A (en) 2003-03-03 2004-09-24 Sumitomo Metal Ind Ltd Steel material and marine steel structure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004263262A (en) 2003-03-03 2004-09-24 Sumitomo Metal Ind Ltd Steel material and marine steel structure

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