JP5155822B2 - Stop sheet pile - Google Patents

Stop sheet pile Download PDF

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JP5155822B2
JP5155822B2 JP2008285004A JP2008285004A JP5155822B2 JP 5155822 B2 JP5155822 B2 JP 5155822B2 JP 2008285004 A JP2008285004 A JP 2008285004A JP 2008285004 A JP2008285004 A JP 2008285004A JP 5155822 B2 JP5155822 B2 JP 5155822B2
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water
joint
stop
sheet pile
water stop
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JP2010112054A (en
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北村　　精男
田内　　宏明
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GIKEN LTD.
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Description

本発明は、止水用矢板に係り、複数繋ぎ合わせることで止水壁を構築する止水用矢板に関する。   The present invention relates to a sheet pile for water stop, and relates to a sheet pile for water stop that constructs a water stop wall by connecting a plurality of sheets.

従来、繋ぎ合わせた鋼矢板の止水性を高める方法として、止水材を鋼矢板の継手部分に設ける技術がある。
例えば、鋼矢板を地中に埋設する前に、液状の止水剤を予め鋼矢板の継手部分に塗布して固化させることによって、止水材を形成する手法が知られている。
また、継手を繋ぎ合わせて鋼矢板を地中に埋設した後、その継手間に形成される空隙に液状の止水剤を注入して固化させることによって、止水材を形成する手法が知られている（例えば、特許文献１参照。）。
特開２００７−２９７８０６号公報 Conventionally, there exists a technique which provides a water stop material in the joint part of a steel sheet pile as a method of raising the water stop of the joined steel sheet pile.
For example, before embedding a steel sheet pile in the ground, a method of forming a water stop material by applying a liquid water stop agent to a joint portion of the steel sheet pile in advance and solidifying is known.
Also, a technique for forming a water-stopping material is known by connecting a joint and embedding a steel sheet pile in the ground, and then injecting a liquid water-stop agent into the gap formed between the joints and solidifying it. (For example, refer to Patent Document 1).
JP 2007-297806 A

しかしながら、上記従来技術の場合、図１１（ａ）（ｂ）に示すように、鋼矢板を地中に埋設する際に、継手同士が接触することにより、互いの継手に設けられた止水材５５を削り落としてしまい、その止水材５５の一部が脱落してしまうことで、十分な止水性能を発揮できないことがある問題があった。
また、上記特許文献１の場合、地下水流によって液状の止水剤が流出してしまい、十分な止水材を形成できず、必要な止水性能が得られないことがある問題があった。
更に、液状の止水剤を鋼矢板の全長に亘って均一に塗布したり注入したりすることは不慣れな作業者にとって困難な作業であり、形成される止水材の形状などに不具合が生じてしまうことがあった。 However, in the case of the above prior art, as shown in FIGS. 11 (a) and 11 (b), when the steel sheet pile is embedded in the ground, the joints come into contact with each other, so that the water-stopping material provided in the mutual joints. There is a problem that the water stop performance may not be sufficiently exhibited because the water stop material 55 is scraped off and a part of the water stop material 55 falls off.
Moreover, in the case of the above-mentioned Patent Document 1, there is a problem that a liquid water-stopping agent flows out due to a groundwater flow, a sufficient water-stopping material cannot be formed, and a required water-stopping performance cannot be obtained.
Furthermore, it is difficult for an unskilled worker to uniformly apply or inject a liquid waterproofing agent over the entire length of the steel sheet pile, resulting in problems with the shape of the waterproofing material formed. There was a case.

本発明の目的は、良好な止水性能を発揮することができる止水用矢板を提供することである。   The objective of this invention is providing the sheet pile for water stop which can exhibit favorable water stop performance.

以上の課題を解決するため、請求項１に記載の発明は、
一対の継手を有する止水用矢板であって、
少なくとも一方の継手に、膨張性を有する止水材が備えられ、
前記止水材は、当該止水用矢板同士の継手が互いに嵌め合わされる際に、対向するそれぞれの継手の内面と外面との間の空隙が最も小さくなる嵌合状態における前記空隙に収まるように、前記継手の内面または外面に備えられており、
前記止水材は、当該止水材が備えられた継手と嵌合する継手に当接する弾性変形可能な突起部を備えていることを特徴とする。 In order to solve the above problems, the invention described in claim 1
A sheet pile for water stop having a pair of joints,
At least one of the joints is provided with a water-stopping material having expandability,
When the joint of the water-stop sheet piles is fitted to each other, the water-stopping material is accommodated in the gap in the fitting state in which the gap between the inner surface and the outer surface of each opposing joint is minimized. , Provided on the inner or outer surface of the joint ,
The water-stopping material includes an elastically deformable protrusion that abuts on a joint fitted with a joint provided with the water-stopping material .

請求項２に記載の発明は、請求項１に記載の止水用矢板において、
前記突起部は、前記止水用矢板に対して作用する水の加圧方向に逆らう向きに突出していることを特徴とする。 The invention according to claim 2 is the sheet pile for water stop according to claim 1,
The protrusion protrudes in a direction opposite to the pressurizing direction of water acting on the water stop sheet pile .

請求項３に記載の発明は、請求項１又は２に記載の止水用矢板において、
前記止水材が吸水して膨張することで、一方の継手の内面と他方の継手の外面に密着することを特徴とする。 The invention according to claim 3 is the sheet pile for water stop according to claim 1 or 2 ,
When the water blocking material absorbs water and expands, the inner surface of one joint and the outer surface of the other joint are in close contact with each other.

請求項４に記載の発明は、請求項１又は２に記載の止水用矢板において、
前記止水材の少なくとも一部に膨張材を備え、その膨張材が膨張することで前記止水材自体が膨張して一方の継手の内面と他方の継手の外面に密着することを特徴とする。 The invention according to claim 4 is the sheet pile for water stop according to claim 1 or 2 ,
An expansion material is provided in at least a part of the water stop material, and the expansion material expands so that the water stop material itself expands and closely contacts the inner surface of one joint and the outer surface of the other joint. .

本発明によれば、止水用矢板は、少なくとも一方の継手に膨張性を有する止水材が備えられており、特に、その止水材は、止水用矢板同士の継手が互いに嵌め合わされる際に、対向するそれぞれの継手の内面と外面との間において最小となる空隙に収まるように備えられているので、止水用矢板の一方の継手と他方の継手とを嵌合する際に、一方の継手に備えられた止水材に、他方の継手が接触することはないので、その止水材が損傷してしまうことはない。
そのため、連設された止水用矢板を繋ぐ継手同士の間には、所定の止水材が配設されているので、その止水材が設計通りに膨張することで、継手間の隙間を確実に埋めることが可能となり、止水用矢板が良好な止水性能を発揮することができる。 According to the present invention, the water-stop sheet pile is provided with an expandable water-stop material in at least one joint, and in particular, the water-stop sheet is fitted with a joint between the water-stop sheet piles. At that time, since it is provided to fit in the smallest gap between the inner surface and the outer surface of each opposing joint, when fitting one joint and the other joint of the water-stop sheet pile, Since the other joint does not come into contact with the water stop material provided in one joint, the water stop material is not damaged.
Therefore, since a predetermined water-stopping material is disposed between the joints that connect the water-stop sheet piles provided in series, the water-stopping material expands as designed so that the gap between the joints is reduced. It becomes possible to bury reliably, and the sheet pile for water stop can show the favorable water stop performance.

以下、図面を参照して、本発明に係る止水用矢板の実施形態について詳細に説明する。   Hereinafter, with reference to drawings, the embodiment of the sheet pile for water stop concerning the present invention is described in detail.

（実施形態１）
止水用矢板１０は、図１から図３に示すように、例えば、ハット型の鋼矢板であって、その矢板本体３の両側に第１の継手１と第２の継手２がそれぞれ設けられている。
第１の継手１は、第２の継手２の内面２１に嵌入する嵌入部１ａと、第２の継手２の嵌入部２ａが嵌入される凹状の内面１１を有しており、また、第２の継手２は、第１の継手１の内面１１に嵌入する嵌入部２ａと、第１の継手１の嵌入部１ａが嵌入される凹状の内面２１を有している。
そして、鉤状の第１の継手１と第２の継手２が互いに嵌め合わされて、止水用矢板１０同士が連結されるようになっている。 (Embodiment 1)
As shown in FIGS. 1 to 3, the water-stop sheet pile 10 is, for example, a hat-type steel sheet pile, and a first joint 1 and a second joint 2 are provided on both sides of the sheet pile body 3, respectively. ing.
The first joint 1 has a fitting portion 1a that fits into the inner surface 21 of the second joint 2, a concave inner surface 11 into which the fitting portion 2a of the second joint 2 is fitted, and the second fitting 2a. The joint 2 has a fitting portion 2a that fits into the inner surface 11 of the first joint 1 and a concave inner surface 21 into which the fitting portion 1a of the first joint 1 is fitted.
And the flange-like 1st coupling 1 and the 2nd coupling 2 are mutually fitted, and the sheet piles 10 for water stop are connected.

第２の継手２には、図２（ａ）（ｂ）に示すように、吸水膨張性を有する止水材５が備えられている。
止水材５は、例えば、高吸水ポリマーとゴムの複合材である水膨張ゴムからなり、水を吸収した際の膨張率は、例えば、２〜１０倍程度のものを任意に選定できるようになっている。
この止水材５は、後述する空隙Ｓの形状に応じて成形された部材であり、両面テープや接着剤などによって第２の継手２の内面２１に貼付されている。
そして、止水材５は、一方の止水用矢板１０の継手１と、他方の止水用矢板１０の継手２が互いに嵌め合わされる際に、対向する第１の継手１における凸状の外面１２と、第２の継手２における凹状の内面２１との間の空隙Ｓが最も小さくなる嵌合状態におけるその空隙Ｓに収まるように、第２の継手２の内面２１に備えられている。 As shown in FIGS. 2 (a) and 2 (b), the second joint 2 is provided with a water stop material 5 having water absorbability and expandability.
The water stop material 5 is made of, for example, a water-expandable rubber that is a composite material of a highly water-absorbing polymer and rubber, and an expansion coefficient when absorbing water can be arbitrarily selected, for example, about 2 to 10 times. It has become.
The water blocking material 5 is a member formed according to the shape of the gap S described later, and is affixed to the inner surface 21 of the second joint 2 with a double-sided tape, an adhesive, or the like.
And when the joint 1 of the water-stop sheet pile 10 and the joint 2 of the other water-stop sheet pile 10 are mutually fitted, the water stop material 5 is the convex outer surface in the 1st joint 1 which opposes. 12 and the inner surface 21 of the second joint 2 so that the space S between the inner surface 21 and the concave inner surface 21 of the second joint 2 is within the smallest gap S in the fitted state.

具体的には、図２（ａ）に示すように、第１の継手１の嵌入部１ａの先端が、第２の継手２の内面２１に当接しつつ、第１の継手１の外面１２が、第２の継手の内面２２の開口部分に当接して嵌合する状態において、空隙Ｓに収まるサイズの止水材５が、第１の継手１の外面１２との間に隙間を形成するように、第２の継手２の内面２１に貼付されて備えられている。
特に、図２（ｂ）に示すように、第１の継手１の外面１２と、第２の継手２の内面２１との間の空隙Ｓが最も小さくなる嵌合状態である、第１の継手１の外面１２が、第２の継手の内面２１の開口部分に当接しつつ、第２の継手２の外面２２が、第１の継手の内面１１の開口部分に当接し、更に、第１の継手１の嵌入部１ａの先端が、第２の継手２の内面２１に当接しつつ、第２の継手２の嵌入部２ａの先端が、第１の継手１の内面１１に当接して嵌合する状態において、その最小となった空隙Ｓに収まるサイズの止水材５が、第１の継手１の外面１２との間に隙間を形成するように、第２の継手２の内面２１に貼付されて備えられている。
このような配置に止水材５が備えられているので、第１の継手１と第２の継手２とが嵌合する際に、第１の継手１が止水材５に接触することはなく、止水材５が損傷することがない。 Specifically, as shown in FIG. 2A, the outer surface 12 of the first joint 1 is in contact with the tip of the fitting portion 1a of the first joint 1 in contact with the inner surface 21 of the second joint 2. In the state of being in contact with and fitting to the opening portion of the inner surface 22 of the second joint, the water blocking material 5 having a size that fits in the gap S forms a gap with the outer surface 12 of the first joint 1. The second joint 2 is attached to the inner surface 21 of the second joint 2.
In particular, as shown in FIG. 2 (b), the first joint is in a fitting state in which the gap S between the outer surface 12 of the first joint 1 and the inner surface 21 of the second joint 2 is minimized. The outer surface 22 of the second joint 2 is in contact with the opening portion of the inner surface 11 of the first joint, while the outer surface 12 of the first joint is in contact with the opening portion of the inner surface 21 of the second joint. The tip of the fitting portion 1a of the joint 1 is in contact with the inner surface 21 of the second joint 2, while the tip of the fitting portion 2a of the second joint 2 is in contact with the inner surface 11 of the first joint 1. In such a state, the water blocking material 5 having a size that can be accommodated in the smallest gap S is attached to the inner surface 21 of the second joint 2 so as to form a gap with the outer surface 12 of the first joint 1. Have been provided.
Since the water stop material 5 is provided in such an arrangement, when the first joint 1 and the second joint 2 are fitted, the first joint 1 is in contact with the water stop material 5. In addition, the water blocking material 5 is not damaged.

このように、第２の継手２に備えられた止水材５に、第１の継手１が接触することはないので、図３（ａ）に示すように、先に地中に埋設された止水用矢板１０の第１の継手１に、第２の継手２を嵌合させて次の止水用矢板１０を地中に埋設する際に、止水材５が損傷することはない。
また、第１の継手１と第２の継手２とが嵌合した連結部分における第１の継手１と第２の継手２の間隙は、止水材５の厚みよりも狭いので、止水材５が第１の継手１と第２の継手２の間から抜け出てしまうことはない。 Thus, since the 1st coupling 1 does not contact the water stop material 5 with which the 2nd coupling 2 was equipped, as shown to Fig.3 (a), it was embed | buried previously in the ground. When the second joint 2 is fitted to the first joint 1 of the water stop sheet pile 10 and the next water stop sheet pile 10 is buried in the ground, the water stop material 5 is not damaged.
In addition, since the gap between the first joint 1 and the second joint 2 in the connecting portion where the first joint 1 and the second joint 2 are fitted is narrower than the thickness of the water-stopping material 5, the water-stopping material 5 does not come out from between the first joint 1 and the second joint 2.

そして、図３（ｂ）に示すように、地中に埋設された止水用矢板１０の連結部分である第１の継手１と第２の継手２の間に、地下水などが浸入すると、止水材５がその水を吸収して膨張することで、その止水材５が第２の継手２の内面２１と第１の継手１の外面１２に密着して、第１の継手１と第２の継手２との間の隙間を埋めるようになる。
こうして膨張した止水材５によって、第１の継手１と第２の継手２との間の隙間が埋められることで、その第１の継手１と第２の継手２の間を水が通過できなくなるので、この止水用矢板１０は、高い止水性能を有するといえる。
特に、第２の継手２の内面２１に止水材５が備えられることによって、第１の継手の内面１１の開口部分と第２の継手２の外面２２との間から浸入する地下水が、継手同士の接触部分に妨げられるなどして、止水材５に到達するまでに時間や経路が余分にかかることになり、その地下水の浸入を遅らせることができるので、より優れた止水性能を有するようになっている。
なお、膨張した止水材５が、第１の継手１と第２の継手２とに圧接することで、第１の継手１と第２の継手２との連結がより強固になる。 And as shown in FIG.3 (b), if groundwater etc. infiltrate between the 1st coupling 1 and the 2nd coupling 2 which are the connection parts of the water-stop sheet pile 10 embed | buried in the ground, it will stop. When the water material 5 absorbs the water and expands, the water blocking material 5 comes into close contact with the inner surface 21 of the second joint 2 and the outer surface 12 of the first joint 1, and the first joint 1 and the first joint 1 The gap between the two joints 2 is filled.
The water stop material 5 thus expanded fills the gap between the first joint 1 and the second joint 2 so that water can pass between the first joint 1 and the second joint 2. Since it disappears, it can be said that this sheet pile 10 for water stop has high water stop performance.
In particular, when the water stop material 5 is provided on the inner surface 21 of the second joint 2, groundwater that enters from between the opening portion of the inner surface 11 of the first joint and the outer surface 22 of the second joint 2 is allowed to enter the joint. Because it is obstructed by the contact portion between each other, it takes extra time and route to reach the water stop material 5, and the infiltration of the groundwater can be delayed, so it has better water stop performance It is like that.
In addition, the expanded water stop material 5 press-contacts with the 1st coupling 1 and the 2nd coupling 2, and the connection with the 1st coupling 1 and the 2nd coupling 2 becomes stronger.

そして、例えば、図４に示すように、各止水用矢板１０の第１の継手１と第２の継手２を嵌合させて、複数の止水用矢板１０を繋ぎ合わせて連設することで止水壁１００を構築すれば、止水壁１００の一方の壁面に向かう水を他方の壁面側に通過させないように遮断することができ、その他方の壁面側（図４における止水壁１００に囲われた内側の空間）を防水された環境に維持することが可能になる。   And, for example, as shown in FIG. 4, the first joint 1 and the second joint 2 of each water stop sheet pile 10 are fitted, and a plurality of water stop sheet piles 10 are connected and connected. If the water blocking wall 100 is constructed in this way, it is possible to block the water traveling toward one wall surface of the water blocking wall 100 from passing through to the other wall surface side, and the other wall surface side (water blocking wall 100 in FIG. 4). It is possible to maintain the inner space surrounded by the water-resistant environment.

以上のように、止水用矢板１０において、第１の継手１と第２の継手２とを嵌合する際に、第２の継手２に備えられた止水材５に、第１の継手１が接触することはないので、継手同士を嵌合させて止水用矢板１０を連設する際に、止水材５が損傷してしまうことはない。
つまり、連設された止水用矢板１０を繋ぐ第１の継手１と第２の継手２の間には、損傷や欠損のない所定の止水材５が配設されているので、その止水材５が設計通りに吸水膨張することで、第１の継手１と第２の継手２との間の隙間を確実に埋めることができ、止水用矢板１０が良好な止水性能を発揮することが可能になる。 As described above, when fitting the first joint 1 and the second joint 2 in the water-stop sheet pile 10, the first joint is attached to the water-stopping material 5 provided in the second joint 2. Since 1 does not contact, when the joints are fitted and the water-stop sheet pile 10 is continuously provided, the water-stop material 5 is not damaged.
That is, since the predetermined water-stop material 5 without damage and a defect | deletion is arrange | positioned between the 1st coupling 1 and the 2nd joint 2 which connect the continuous sheet pile 10 for water stop, the stop Since the water material 5 absorbs and expands as designed, the gap between the first joint 1 and the second joint 2 can be reliably filled, and the water-stop sheet pile 10 exhibits good water-stopping performance. It becomes possible to do.

特に、この止水用矢板１０は、第１の継手１と第２の継手２が互いに嵌め合わされる際に、第２の継手２の内面２１と第１の継手１の外面１２との間の空隙Ｓが最も小さくなる嵌合状態におけるその空隙Ｓの形状に応じて成形した止水材５を、その継手部分に配設することにより得られるので、各種矢板における様々な形状の継手においてもその継手間の空隙の形状に対応する止水材を成形して所定位置に配設することによって、良好な止水性能を発揮することが可能な止水用矢板とすることができる。
例えば、図１０に示す従来の止水用矢板９０における継手８０の内面８１には、止水材８５を配設するための溝部８１ａが設けられているが、このような特殊な形状の継手８０を形成することなく、任意の矢板や継手に本発明を適用することによって、良好な止水性能を発揮することができる止水用矢板１０が得られる。
つまり、本発明に係る止水用矢板１０は、汎用性に優れた止水用矢板であるといえる。 In particular, when the first joint 1 and the second joint 2 are fitted together, the water-stop sheet pile 10 is provided between the inner surface 21 of the second joint 2 and the outer surface 12 of the first joint 1. Since the water-stopping material 5 molded according to the shape of the gap S in the fitting state in which the gap S is the smallest is obtained by disposing it in the joint portion, the joints of various shapes in various sheet piles can also be obtained. By forming a water stop material corresponding to the shape of the gap between the joints and disposing it at a predetermined position, it is possible to provide a water stop sheet pile capable of exhibiting good water stop performance.
For example, the inner surface 81 of the joint 80 in the conventional water-stop sheet pile 90 shown in FIG. 10 is provided with a groove portion 81a for disposing the water-stopping material 85. The joint 80 having such a special shape is provided. By applying the present invention to an optional sheet pile or joint without forming the water sheet pile 10 can be obtained that can exhibit good water stop performance.
That is, it can be said that the water-stop sheet pile 10 according to the present invention is a water-stop sheet pile excellent in versatility.

なお、止水材５は、第２の継手２の内面２１に備えられていることに限らず、例えば、図５（ａ）に示すように、止水材５が第２の継手２の外面２２に備えられていてもよい。
また、図５（ｂ）に示すように、止水材５は、第１の継手１の内面１１に備えられていてもよく、また、図５（ｃ）に示すように、止水材５は、第１の継手１の外面１２に備えられていてもよい。 The water blocking material 5 is not limited to being provided on the inner surface 21 of the second joint 2. For example, as shown in FIG. 5A, the water blocking material 5 is an outer surface of the second joint 2. 22 may be provided.
Moreover, as shown in FIG.5 (b), the water stop material 5 may be provided in the inner surface 11 of the 1st coupling 1, and as shown in FIG.5 (c), the water stop material 5 is provided. May be provided on the outer surface 12 of the first joint 1.

また、止水材は、止水材５のように、その全体が膨張する水膨張ゴムのみで形成されていることに限らず、止水材の少なくとも一部に水膨張ゴムが組み込まれていればよい。
例えば、図６（ａ）に示すように、第一の膨張材である強制膨張材５１を第二の膨張材である水膨張ゴム材５２で覆った止水材５ａであってもよい。なお、強制膨張材５１は、吸水膨張とは異なる原理で反応、膨張する材料である。このような止水材５ａであれば、２種の膨張材の膨張によって、止水材５ａを継手に密着させることができ、継手間の隙間を埋めることができる。
また、図６（ｂ）に示すように、第一の膨張材である強制膨張材５１を第二の膨張材である水膨張ゴム材５２で挟み込んだ止水材５ｂであってもよい。このような止水材５ｂであっても、止水材５ｂを継手に密着させることができ、継手間の隙間を埋めることができる。
また、図６（ｃ）に示すように、第一の膨張材である強制膨張材５１を球状の粒としたものを、第二の膨張材である水膨張ゴム材５２に練り込んでなる止水材５ｃであってもよい。このような止水材５ｃであっても、止水材５ｃを継手に密着させることができ、継手間の隙間を埋めることができる。 Further, the water-stopping material is not limited to being formed only from the water-expandable rubber that expands as in the case of the water-stopping material 5, and the water-expanding rubber is incorporated in at least a part of the water-stopping material. That's fine.
For example, as shown to Fig.6 (a), the water stop material 5a which covered the forced expansion material 51 which is a 1st expansion material with the water expansion rubber material 52 which is a 2nd expansion material may be sufficient. The forced expansion material 51 is a material that reacts and expands based on a principle different from water absorption expansion. If it is such a water stop material 5a, the water stop material 5a can be closely_contact | adhered to a coupling | joint by expansion | swelling of 2 types of expansion materials, and the clearance gap between joints can be filled.
Moreover, as shown in FIG.6 (b), the water stop material 5b which pinched | interposed the forced expansion material 51 which is a 1st expansion material with the water expansion rubber material 52 which is a 2nd expansion material may be sufficient. Even if it is such a water stop material 5b, the water stop material 5b can be stuck to a joint, and the crevice between joints can be filled up.
Further, as shown in FIG. 6 (c), a spherical expansion of the forced expansion material 51, which is the first expansion material, is kneaded into the water expansion rubber material 52, which is the second expansion material. The water material 5c may be sufficient. Even if it is such a water stop material 5c, the water stop material 5c can be stuck to a joint, and the crevice between joints can be filled up.

なお、止水材を異なる作用で膨張する２種類の膨張材で構成することに限らず、３種類以上複数種の膨張材によって構成するようにしてもよい。   In addition, you may make it comprise not only with 2 types of expansion | swelling materials which expand | swell a water stop material by a different effect | action but with 3 types or more of multiple types of expansion | swelling materials.

（実施形態２）
次に、本発明に係る止水用矢板の実施形態２について説明する。なお、実施形態１と同一部分には同一符号を付し、異なる部分についてのみ説明する。 (Embodiment 2)
Next, Embodiment 2 of the sheet pile for water stop which concerns on this invention is demonstrated. In addition, the same code | symbol is attached | subjected to the same part as Embodiment 1, and only a different part is demonstrated.

止水用矢板３０は、図７（ａ）（ｂ）に示すように、第２の継手２に止水材６を備えている。
止水材６は、第２の継手２の内面２１に貼付される止水材本体６１と、第２の継手２の嵌合対象である第１の継手１の外面１２に向けて突出する突起部６２を備えている。
この止水材６は、水膨張ゴムからなり、止水材本体６１と突起部６２とは一体に成形されている。 As shown in FIGS. 7A and 7B, the water-stop sheet pile 30 includes a water-stop material 6 in the second joint 2.
The waterstop material 6 is a protrusion that protrudes toward the outer surface 12 of the first joint 1, which is a fitting target of the second joint 2, and the waterstop material body 61 attached to the inner surface 21 of the second joint 2. A portion 62 is provided.
The water blocking material 6 is made of a water expansion rubber, and the water blocking material main body 61 and the protrusion 62 are integrally formed.

止水材本体６１は、対向する第２の継手２の内面２１と第１の継手１の外面１２との間の空隙Ｓが最も小さくなる嵌合状態におけるその空隙Ｓに収まる形状を有している。
突起部６２は、図７（ａ）に示すように、止水材本体６１の表面から***して突出する形状を有しており、第１の継手１に対して当接可能になっている。この突起部６２は、図７（ｂ）に示すように、弾性変形可能であって、第１の継手１に当接することで傾倒するように変形し、第２の継手２の内面２１と第１の継手１の外面１２との間に収まるようになっている。
つまり、止水材６は、その突起部６２が弾性変形することによって、第２の継手２の内面２１と第１の継手１の外面１２との間の空隙Ｓに収まるようになっている。 The water blocking material main body 61 has a shape that fits in the gap S in the fitting state where the gap S between the inner surface 21 of the second joint 2 and the outer surface 12 of the first joint 1 facing each other is the smallest. Yes.
As shown in FIG. 7A, the protruding portion 62 has a shape protruding from the surface of the water blocking material main body 61 so as to be able to come into contact with the first joint 1. . As shown in FIG. 7B, the protrusion 62 can be elastically deformed, and is deformed so as to be tilted by coming into contact with the first joint 1. It fits between the outer surface 12 of one joint 1.
That is, the water blocking material 6 is accommodated in the space S between the inner surface 21 of the second joint 2 and the outer surface 12 of the first joint 1 by the elastic deformation of the protrusion 62.

そして、図７（ｂ）に示すように、先に地中に埋設された止水用矢板３０の第１の継手１に、第２の継手２を嵌合させて次の止水用矢板３０を地中に埋設する際に、第１の継手１の外面１２に接触した止水材６の突起部６２は、その外面１２に倣って撓むことで当接するようになっている。
なお、第２の継手２に備えられた止水材本体６１に、第１の継手１が接触することはないので、その止水材本体６１が損傷することはない。 And as shown in FIG.7 (b), the 2nd coupling 2 is made to fit in the 1st coupling 1 of the sheet pile 30 for water stop previously embed | buried in the ground, and the next sheet pile 30 for water stop is set. Is embedded in the ground, the protruding portion 62 of the water blocking material 6 that has contacted the outer surface 12 of the first joint 1 comes into contact with the outer surface 12 by bending along the outer surface 12.
In addition, since the 1st coupling 1 does not contact the water stop material main body 61 with which the 2nd coupling 2 was equipped, the water stop material main body 61 is not damaged.

こうして既設の止水用矢板３０に対して新たな止水用矢板３０を連結させて埋設する施工を行う際に、第２の継手２に備えらた止水材６の突起部６２が第１の継手１に当接するので、その施工中に第１の継手１と第２の継手２との嵌合が完了した部分から、直ちに止水効果を発揮するようになる。   Thus, when the construction for connecting and embedding a new water-stop sheet pile 30 to the existing water-stop sheet pile 30 is performed, the projection 62 of the water-stop material 6 provided in the second joint 2 is the first. Therefore, the water stop effect is immediately exerted from the portion where the fitting of the first joint 1 and the second joint 2 is completed during the construction.

そして、地中に埋設された止水用矢板３０の連結部分である第１の継手１と第２の継手２の間に、地下水などが浸入すると、止水材６がその水を吸収して膨張し、その止水材６が第２の継手２の内面２１と第１の継手１の外面１２に密着して、第１の継手１と第２の継手２との間の隙間を埋める。
特に、止水材本体６１は、損傷や欠損しておらず、その止水材６の止水材本体６１が設計通りに吸水膨張することで、第１の継手１と第２の継手２との間の隙間を確実に埋めることができるので、止水用矢板３０が良好な止水性能を発揮することが可能になる。
このように、止水材本体６１と突起部６２を有する止水材６であれば、より好適な止水性能を発揮することができる。 And if groundwater infiltrates between the 1st joint 1 and the 2nd joint 2 which are the connection parts of the water stop sheet pile 30 embed | buried in the ground, the water stop material 6 will absorb the water. The water-stopping material 6 is in close contact with the inner surface 21 of the second joint 2 and the outer surface 12 of the first joint 1 to fill the gap between the first joint 1 and the second joint 2.
In particular, the water-stop material body 61 is not damaged or missing, and the water-stop material body 61 of the water-stop material 6 absorbs and expands as designed, so that the first joint 1 and the second joint 2 Therefore, it is possible for the sheet pile for water stop 30 to exhibit good water stop performance.
Thus, if it is the water stop material 6 which has the water stop material main body 61 and the projection part 62, more suitable water stop performance can be exhibited.

なお、止水材は、止水材６のように、突起部６２が一つであることに限らず、複数の突起部を有していてもよい。
例えば、図８（ａ）に示すように、止水材本体６１に、比較的大きな突起部６２ａと、その突起部６２ａを挟んで設けられた比較的小さな突起部６２ｂ、６２ｂを備える止水材６ａであってもよい。
また、図８（ｂ）に示すように、止水材本体６１に、先端部が平坦な中央側突起部６２ｃと、両側突起部６２ｄ、６２ｄを備える止水材６ｂであってもよい。
このような止水材６ａ、６ｂであっても、対向する第２の継手２の外面２２に突起部を当接させることができるとともに、その吸水膨張によって継手間の隙間を埋めることができる。 In addition, the water stop material is not limited to one protrusion 62 as in the water stop material 6 and may have a plurality of protrusions.
For example, as shown in FIG. 8A, a water-stopping material provided with a relatively large protrusion 62a and relatively small protrusions 62b and 62b provided on the water-stopper main body 61 with the protrusion 62a interposed therebetween. It may be 6a.
Moreover, as shown in FIG.8 (b), the water stop material 6b provided in the water stop material main body 61 with the center side projection part 62c with a flat front-end | tip part and both side projection parts 62d and 62d may be sufficient.
Even with such water-stopping materials 6a and 6b, the protrusion can be brought into contact with the outer surface 22 of the opposing second joint 2, and the gap between the joints can be filled by the water absorption expansion.

（実施形態３）
次に、本発明に係る止水用矢板の実施形態３について説明する。なお、実施形態１と同一部分には同一符号を付し、異なる部分についてのみ説明する。 (Embodiment 3)
Next, Embodiment 3 of the sheet pile for water stop which concerns on this invention is demonstrated. In addition, the same code | symbol is attached | subjected to the same part as Embodiment 1, and only a different part is demonstrated.

止水用矢板４０は、図９に示すように、第２の継手２に止水材６ｃを備えている。
止水材６ｃは、第２の継手２の内面２１に貼付される止水材本体６１と、第２の継手２の嵌合対象である第１の継手１の外面１２に向けて突出する２つの突起部６２ｅ、６２ｅを備えている。 As shown in FIG. 9, the water-stop sheet pile 40 includes a water-stop material 6 c in the second joint 2.
The water blocking material 6 c protrudes 2 toward the outer surface 12 of the first joint 1, which is a fitting target of the second joint 2, and the water blocking material main body 61 attached to the inner surface 21 of the second joint 2. Two protrusions 62e, 62e are provided.

この止水材６ｃは、水膨張ゴムからなり、止水材本体６１と突起部６２ｅとは一体に成形されている。
特に、突起部６２ｅは、図９に示すように、止水材６ｃが第２の継手２に備えられた状態で、止水用矢板４０に対して作用する水の加圧方向に逆らう向きに突出して立設するように形成されている。
この突起部６２ｅが、水の加圧方向（水圧）に逆らう向きに突出していることで、既設の止水用矢板４０に対して新たな止水用矢板４０を連結させて埋設する施工を行う際に、その止水用矢板４０に地下水流などの水圧が作用するような場合でも、突起部６２ｅは、水圧に抗して立設した状態を維持して、突起部６２ｅが第１の継手１の外面１２に対してより確実に当接するようになっている。 The water blocking material 6c is made of water expansion rubber, and the water blocking material main body 61 and the protrusion 62e are integrally formed.
In particular, as shown in FIG. 9, the protrusion 62 e is in a direction opposite to the pressurizing direction of water acting on the water-stop sheet pile 40 in a state where the water-stop material 6 c is provided in the second joint 2. It is formed so as to protrude and stand.
The projecting portion 62e protrudes in a direction opposite to the water pressurization direction (water pressure), so that a new water stop sheet pile 40 is connected to the existing water stop sheet pile 40 to embed. At this time, even when a water pressure such as a groundwater flow acts on the water stop sheet pile 40, the protrusion 62e maintains a standing state against the water pressure, and the protrusion 62e is the first joint. 1 is more reliably brought into contact with the outer surface 12.

このように、止水用矢板４０は、当該止水用矢板４０に作用する水圧に抗して、立設した状態を維持可能な向きに突出する突起部６２ｅを有する止水材６ｃを備えているので、第１の継手１と第２の継手２の嵌合が完了した部分において、より確実に止水効果を発揮することができる。   Thus, the water stop sheet pile 40 is provided with the water stop material 6c which has the projection part 62e which protrudes in the direction which can maintain the standing state against the water pressure which acts on the said water stop sheet pile 40 concerned. Therefore, the water stop effect can be more reliably exhibited in the portion where the fitting of the first joint 1 and the second joint 2 is completed.

なお、以上の実施の形態において、止水用矢板をハット型の鋼矢板として説明したが、本発明はこれに限定されるものではなく、他の矢板の継手や止水材に本発明を適用してもよい。   In the above embodiment, the water-stop sheet pile has been described as a hat-type steel sheet pile, but the present invention is not limited to this, and the present invention is applied to other sheet pile joints and water-stop materials. May be.

また、以上の実施の形態において、止水用矢板の一方の継手に止水材を備える構成を例に説明したが、本発明はこれに限定されるものではなく、例えば、第１の継手１の内面１１と第２の継手２の内面２１にそれぞれ止水材を備えてもよく、また、第１の継手１の内面１１と第１の継手１の外面１２、第１の継手１の外面１２と第２の継手２の外面２２、第２の継手２の内面２１と第２の継手２の外面２２に、それぞれ止水材を備えるようにしてもよい。
止水用矢板の２箇所に止水材を備えることによれば、より一層止水効果を高めることができ、また、止水用矢板の１箇所に止水材を備えることによれば、止水材のコスト低減と止水材を貼付する作業時間の短縮に関するメリットが得られる。 Moreover, in the above embodiment, although the structure provided with a water stop material in one joint of the sheet pile for water stop was demonstrated to the example, this invention is not limited to this, For example, the 1st joint 1 The inner surface 11 of the first joint 1 and the inner surface 21 of the second joint 2 may be provided with water-stopping materials, respectively, the inner surface 11 of the first joint 1, the outer surface 12 of the first joint 1, and the outer surface of the first joint 1. 12 and the outer surface 22 of the second joint 2, the inner surface 21 of the second joint 2, and the outer surface 22 of the second joint 2 may each be provided with a water stop material.
By providing the water stop material at two locations of the water stop sheet pile, the water stop effect can be further enhanced, and by providing the water stop material at one location of the water stop sheet pile, Benefits can be obtained regarding cost reduction of water material and shortening of work time for applying water stop material.

また、その他、具体的な細部構造等についても適宜に変更可能であることは勿論である。   In addition, it is needless to say that other specific detailed structures can be appropriately changed.

本発明に係る止水用矢板の端面を示す上面図である。It is a top view which shows the end surface of the sheet pile for water stop which concerns on this invention. 止水用矢板の第１の継手と第２の継手の嵌合状態を示す説明図（ａ）（ｂ）である。It is explanatory drawing (a) (b) which shows the fitting state of the 1st coupling and 2nd coupling of a sheet pile for water stop. 止水用矢板の第１の継手と第２の継手とが嵌合した状態を示し、止水材が吸水する前の状態（ａ）と、止水材が吸水膨張した状態（ｂ）を示す説明図である。The state (a) before the water-stopping material absorbs water and the state (b) where the water-stopping material absorbs and expands are shown. It is explanatory drawing. 止水用矢板が連設されてなる止水壁の一例を示す上面図である。It is a top view which shows an example of the water stop wall by which the sheet pile for water stop is provided in a row. 止水材の配設パターンを示す説明図（ａ）（ｂ）（ｃ）である。It is explanatory drawing (a) (b) (c) which shows the arrangement | positioning pattern of a water stop material. 止水材の変形例を示す説明図（ａ）（ｂ）（ｃ）である。It is explanatory drawing (a) (b) (c) which shows the modification of a water stop material. 本発明の実施形態２における止水用矢板と止水材を示し、継手の嵌合前（ａ）と、継手の嵌合後（ｂ）示す説明図である。It is explanatory drawing which shows the sheet pile for water stop in Embodiment 2 of this invention, and a water stop material, and shows (a) after fitting of a joint, and (b) after fitting of a joint. 止水材の変形例を示す説明図（ａ）（ｂ）である。It is explanatory drawing (a) (b) which shows the modification of a water stop material. 本発明の実施形態３における止水用矢板と止水材を示す説明図である。It is explanatory drawing which shows the sheet pile for water stop in Embodiment 3 of this invention, and a water stop material. 従来の止水用矢板の継手を示す説明図である。It is explanatory drawing which shows the coupling of the conventional sheet pile for water stop. 従来の止水用矢板の継手の嵌合状態を示す説明図（ａ）（ｂ）である。It is explanatory drawing (a) (b) which shows the fitting state of the coupling of the conventional sheet pile for water stop.

符号の説明Explanation of symbols

１ 第１の継手
１ａ 嵌入部
１１ 内面
１２ 外面
２ 第２の継手
２ａ 嵌入部
２１ 内面
２２ 外面
３ 矢板本体
５ 止水材
５ａ、５ｂ 止水材
５１ 強制膨張材
５２ 水膨張ゴム材
６ 止水材
６１ 止水材本体
６２ 突起部
６ａ、６ｂ 止水材
６２ａ、６２ｂ、６２ｃ、６２ｄ 突起部
６ｃ 止水材
６２ｅ 突起部
１０ 止水用矢板
３０ 止水用矢板
４０ 止水用矢板
１００ 止水壁
Ｓ 空隙 DESCRIPTION OF SYMBOLS 1 1st coupling 1a Insertion part 11 Inner surface 12 Outer surface 2 2nd coupling 2a Insertion part 21 Inner surface 22 Outer surface 3 Sheet pile main body 5 Water stop material 5a, 5b Water stop material 51 Forced expansion material 52 Water expansion rubber material 6 Water stop material 61 Water-stopping material body 62 Protruding part 6a, 6b Water-stopping material 62a, 62b, 62c, 62d Protruding part 6c Water-stopping material 62e Protruding part 10 Water-stop sheet pile 30 Water-stop sheet pile 40 Water-stop sheet pile 100 Water-stop wall S Gap

Claims (4)

一対の継手を有する止水用矢板であって、
少なくとも一方の継手に、膨張性を有する止水材が備えられ、
前記止水材は、当該止水用矢板同士の継手が互いに嵌め合わされる際に、対向するそれぞれの継手の内面と外面との間の空隙が最も小さくなる嵌合状態における前記空隙に収まるように、前記継手の内面または外面に備えられており、
前記止水材は、当該止水材が備えられた継手と嵌合する継手に当接する弾性変形可能な突起部を備えていることを特徴とする止水用矢板。 A sheet pile for water stop having a pair of joints,
At least one of the joints is provided with a water-stopping material having expandability,
When the joint of the water-stop sheet piles is fitted to each other, the water-stopping material is accommodated in the gap in the fitting state in which the gap between the inner surface and the outer surface of each opposing joint is minimized. , Provided on the inner or outer surface of the joint ,
The water- stop sheet pile is characterized in that the water-stop material includes an elastically deformable protrusion that abuts a joint fitted with the joint provided with the water-stop material . 前記突起部は、前記止水用矢板に対して作用する水の加圧方向に逆らう向きに突出していることを特徴とする請求項１に記載の止水用矢板。 2. The water-stop sheet pile according to claim 1, wherein the protrusion protrudes in a direction opposite to a pressurizing direction of water acting on the water- stop sheet pile. 前記止水材が吸水して膨張することで、一方の継手の内面と他方の継手の外面に密着することを特徴とする請求項１又は２に記載の止水用矢板。 The water stop sheet pile according to claim 1 or 2 , wherein the water stop material absorbs water and expands, thereby closely contacting an inner surface of one joint and an outer surface of the other joint . 前記止水材の少なくとも一部に膨張材を備え、その膨張材が膨張することで前記止水材自体が膨張して一方の継手の内面と他方の継手の外面に密着することを特徴とする請求項１又は２に記載の止水用矢板。 An expansion material is provided in at least a part of the water stop material, and the expansion material expands so that the water stop material itself expands and closely contacts the inner surface of one joint and the outer surface of the other joint. The sheet pile for water stop of Claim 1 or 2 .
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JPH076179Y2 (en) * 1990-04-07 1995-02-15 新日本製鐵株式会社 Steel sheet pile
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JP4340018B2 (en) * 2001-03-28 2009-10-07 新日本製鐵株式会社 Joint water stop structure of straight steel sheet pile and steel sheet pile continuous wall
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