JP2005113464A - Design method of joint part of steel sheet pile for impervious wall and joint part structure of steel sheet pile for impervious wall using this design method - Google Patents
Design method of joint part of steel sheet pile for impervious wall and joint part structure of steel sheet pile for impervious wall using this design method Download PDFInfo
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Abstract
Description
本発明は、遮水壁用鋼矢板の継手部に関し、特に廃棄物最終処分場や汚染土壌等から流出する汚染水の拡散防止を目的とする遮水鋼矢板の継手構造に関する。 The present invention relates to a joint portion of a steel sheet pile for a water shielding wall, and particularly relates to a joint structure of a water shield steel sheet pile for the purpose of preventing diffusion of contaminated water flowing out from a waste final disposal site or contaminated soil.
廃棄物最終処分場の遮水壁として鋼矢板を用いる場合がある。この場合、鋼矢板の継手部に事前に水膨潤性止水材を塗布後、鋼矢板を地盤中に打設する。水中や土中の水分と反応して膨張した水膨潤性止水材が、互いに対向する継手間の隙間を埋めることにより、継手部からの漏水を防止する(特許文献1〜3参照)。 A steel sheet pile may be used as a water-impervious wall at the final disposal site. In this case, the steel sheet pile is placed in the ground after applying a water-swellable water stop material in advance to the joint portion of the steel sheet pile. The water-swellable water-stopping material that expands by reacting with water in water or soil fills the gaps between the joints facing each other, thereby preventing water leakage from the joints (see Patent Documents 1 to 3).
水膨潤性止水材としては種々の材料が提案されているが、特許文献4に示される、5〜10倍程度に膨潤する湿気硬化型の特殊ポリウレタン樹脂を用いるのが実用化されて広く普及している。
Various materials have been proposed as water-swellable water-stopping materials, but the use of a moisture-curing special polyurethane resin that swells about 5 to 10 times as shown in
しかしながら鋼矢板の打設時に、周辺地盤や嵌合する継手との摩擦により水膨潤性止水材の一部が剥離し、遮水性能に悪影響を及ぼすことがある。継手部同士の接触による水膨潤性止水材の剥離を防止する手段として、継手の嵌合部の軸長方向に凹条溝を穿設し、この凹条溝に水膨潤性止水材を充填する方法(特許文献5参照)や、間隔保持用突起体を設ける方法(特許文献6参照)、雄雌非同一断面形状にして止水材装着用の空隙を確保する方法(特許文献7参照)が考案されている。 However, at the time of placing the steel sheet pile, a part of the water-swellable water-stopping material may be peeled off due to friction with the surrounding ground and the fitting to be fitted, which may adversely affect the water shielding performance. As a means for preventing the separation of the water-swelling waterproofing material due to contact between the joints, a groove groove is drilled in the axial direction of the fitting part of the joint, and a water-swellable water-stopping material is provided in the groove groove. A method of filling (refer to Patent Document 5), a method of providing a spacing holding projection (refer to Patent Document 6), a method of ensuring a gap for mounting a water-stopping material in a male and female non-identical cross-sectional shape (refer to Patent Document 7) ) Has been devised.
一般に鋼矢板の継手部は、地盤への打設時の作業性を考慮して嵌合させたときに隙間が発生するように作られている。上記の水膨潤性止水材による継手部の漏水防止方法では、止水材の体積膨張によりその隙間を充填して水路の形成を防止している。従来の設計方法の考え方は、水を通さない水膨潤性止水材が隙間内にみっちり充填されればよいという考え方、すなわち塗布された水膨潤性止水材の体積と隙間の体積との比が水膨潤性止水材の体積膨張率よりも小さければ隙間が塞がれるという考え方にしたがって塗布量を決定していた。 In general, the joint portion of the steel sheet pile is made so that a gap is generated when it is fitted in consideration of workability at the time of placing on the ground. In the water leakage prevention method for the joint portion using the water-swellable water-stopping material, the gap is filled by the volume expansion of the water-stopping material to prevent the formation of a water channel. The conventional design method is based on the idea that a water-swellable water-proof material that does not allow water to pass through should be filled in the gap, that is, the ratio between the volume of the applied water-swellable water-proof material and the volume of the gap. The coating amount was determined according to the idea that the gap was closed if the volume expansion coefficient of the water-swellable water-stopping material was smaller.
しかし、鋼矢板の継手間の隙間量は一定ではない。U型鋼矢板の場合、中立状態の場合では2〜5mm程度の隙間が発生する一方、隣接する鋼矢板の嵌合状態が最も圧縮側になると継手部内に10mm前後の隙間が発生し、逆に引張り側になると止水材が塗布される継手部の底部が対向する継手部と接触する。継手間に10mm前後の隙間が発生すると、水膨潤性止水材が継手内の隙間を完全に充填できない場合があり、また水膨潤性止水材の膨張圧が遮水壁両面の水圧差よりも小さいために変形して水路が形成され、これにより継手部から漏水することがあった。 However, the amount of gap between the steel sheet pile joints is not constant. In the case of a U-shaped steel sheet pile, a gap of about 2 to 5 mm is generated in the neutral state. On the other hand, when the adjacent steel sheet pile is in the most compression side, a gap of about 10 mm is generated in the joint portion. When it comes to the side, the bottom part of the joint part to which the water blocking material is applied comes into contact with the opposing joint part. If a gap of about 10 mm is generated between the joints, the water-swellable water-stopping material may not be able to completely fill the gaps in the joint, and the expansion pressure of the water-swellable water-stopping material may be due to the water pressure difference between both surfaces of the impermeable walls. Therefore, the water channel was deformed to form a water channel, which could cause water leakage from the joint.
そこで本発明は、遮水壁用鋼矢板の嵌合状態によらず、確実に継手部の止水性能を確保できる遮水壁用鋼矢板の継手部の設計方法及び継手部の構造を提供することを目的とする。 Therefore, the present invention provides a design method for a joint portion of a steel sheet pile for a water shielding wall and a structure of the joint portion that can reliably ensure the water stop performance of the joint portion regardless of the fitting state of the steel sheet pile for a water shielding wall. For the purpose.
上記課題を解決するために、本発明者は、膨潤後の水膨潤性止水材と継手部との接触面での接触応力が、作用水圧よりも大きければ漏れないという原理を適用し、継手間に最大隙間が生じても、水膨潤性止水材の接触応力が鋼矢板の両側での水圧差を上回るように、継手部間の最大隙間、水膨潤性止水材の厚さ及び材質を設計した。 In order to solve the above problem, the present inventor applied the principle that the contact stress at the contact surface between the swollen water-swelling water-stopping material and the joint portion does not leak if the contact stress is greater than the working water pressure. The maximum gap between joints, the thickness and material of the water-swellable water stop material so that the contact stress of the water-swellable water stop material exceeds the water pressure difference on both sides of the steel sheet pile even if there is a maximum gap between them Designed.
すなわち請求項1の発明は、鋼矢板の互いに対向する継手部間に水膨潤性止水材を拘束させる遮水壁用鋼矢板の継手部の設計方法において、鋼矢板の嵌合状態によって継手部間に最大隙間が生じたときにも、継手部と水膨潤後の水膨潤性止水材の接触応力が鋼矢板の両側での水圧差を上回るように、継手部間の最大隙間、水膨潤性止水材の厚さ及び材質を設計することを特徴とする。 That is, the invention according to claim 1 is a method for designing a joint portion of a steel sheet pile for a water shielding wall in which a water-swellable water-stopping material is constrained between joint portions of steel sheet piles facing each other. The maximum gap between the joints and the water swelling so that the contact stress between the joint and the water-swellable water-stopping material after water swelling exceeds the water pressure difference on both sides of the steel sheet pile even when there is a maximum gap between them. It is characterized by designing the thickness and material of the water-resistant waterproof material.
請求項2の発明は、請求項1の遮水壁用鋼矢板の継手部の設計方法において、所定の厚さ及び材質の水膨潤性止水材を用いた場合における、継手部間の隙間と、継手部と水膨潤後の水膨潤性止水材との接触応力との関係を予め求め、この関係に基づいて、継手間の最大隙間、止水材の厚さ及び材質を設計することを特徴とする。
The invention of
請求項3の発明は、請求項1又は2に記載の遮水壁用鋼矢板の継手部の設計方法において、継手部の一方に水膨潤性止水材が収容される窪みを設けることにより、継手部の他方と水膨潤前の水膨潤性との隙間を増加させ、且つ水膨潤性止水材の厚さを増加させたことを特徴とする。
The invention of
請求項4の発明は、請求項3に記載の遮水壁用鋼矢板の継手部の設計方法において、水膨潤前の水膨潤性止水材の断面形状は、直径が8〜18mmの実質的な円形状に設定され、水膨潤前の水膨潤性止水材の継手部の一方からの突出量は1〜2mmに設定されることを特徴とする。
Invention of
請求項5の発明は、鋼矢板の互いに対向する継手部間に水膨潤性止水材を拘束させる遮水壁用鋼矢板の継手部構造において、鋼矢板の嵌合状態によって継手部間に最大隙間が生じたときにも、継手部と水膨潤後の水膨潤性止水材の接触応力が鋼矢板の両側での水圧差を上回ることを特徴とする。
The invention according to
請求項6の発明は、請求項5に記載の遮水壁用鋼矢板の継手部構造において、互いに対向する継手部の一方に水膨潤性止水材が収容される窪みが形成されることを特徴とする。
The invention according to
請求項7の発明は、請求項6に記載の遮水壁用鋼矢板の継手部構造において、水膨潤前の水膨潤性止水材の断面形状は、直径が8〜18mmの実質的な円形状に設定され、前記継手部の一方からの水膨潤前の水膨潤性止水材の突出量は1〜2mmに設定されることを特徴とする。
The invention according to
請求項1の発明によれば、遮水壁用鋼矢板の嵌合状態によらず、確実に継手部の止水性を確保できる。 According to the first aspect of the present invention, the water stoppage of the joint portion can be reliably ensured regardless of the fitting state of the steel sheet pile for the water shielding wall.
請求項2の発明によれば、継手部間の隙間と接触応力との関係をあらかじめ求めておくことで、継手部間の最大隙間、水膨潤性止水材の設計が容易になる。
According to the invention of
一般に水膨潤性止水材の厚さを増加させた方が、継手の許容隙間量が大きくなり(詳しくは後述する)、鋼矢板の製造や地盤への打設時の施工性において有利になる。しかし、膨潤前の止水材の厚さが大きいと、地盤への打設時に継手部の嵌合抵抗が増加したり、対向する継手部や地盤との摩擦により、水膨潤性止水材が剥離する。このため請求項3の発明では、継手部に水膨潤性止水材が収容される窪みを設けて水膨潤性止水材の大部分を収容することにより、止水材を保護しつつ厚さを確保した。
In general, increasing the thickness of the water-swellable water-stopping material increases the allowable clearance of the joint (details will be described later), which is advantageous in terms of workability when manufacturing steel sheet piles and placing on the ground. . However, if the thickness of the water-stopping material before swelling is large, the fitting resistance of the joint part increases when it is placed on the ground, or the water-swellable water-stopping material is caused by friction with the opposing joint part or the ground. Peel off. For this reason, in invention of
請求項4の発明によれば、水膨潤性止水材の突出量が1〜2mmに設定されるので、地盤への打設時に継手部の嵌合抵抗が増加したり、対向する継手部や地盤との摩擦により、水膨潤性止水材が剥離したりするおそれがない。また、水膨潤性止水材の直径が8mm以下になると止水が困難になり、18mm以上になると鋼矢板を製造することが困難になる。
According to invention of
また本発明は請求項5〜7に記載されるように、遮水壁用鋼矢板の継手部構造の発明として構成されてもよい。 Moreover, this invention may be comprised as invention of the joint part structure of the steel sheet pile for water-impervious walls as described in Claims 5-7.
以下添付図面を参照しつつ本発明の遮水壁用鋼矢板の継手部の設計方法の一実施形態を説明する。 Hereinafter, an embodiment of a method for designing a joint portion of a steel sheet pile for a water shielding wall according to the present invention will be described with reference to the accompanying drawings.
最初に断面視で継手部の内面側に水膨潤性止水材(以下止水材という)が充填される窪みが形成されるU型の鋼矢板を設計する例について説明する。図1はこのような窪みが形成される鋼矢板を示す。この鋼矢板は、断面視で、水平なウェブ1と、その幅方向両端を同じ向きに傾斜させたフランジ部2と、該フランジ部2の先端に設けられた爪状の継手部3(所謂ラルゼン継手)を備える。継手部3の爪底部の内面側には止水材を収容する窪み4が熱間圧延で形成される。
First, an example of designing a U-shaped steel sheet pile in which a recess filled with a water-swellable water-stopping material (hereinafter referred to as a water-stopping material) is formed on the inner surface side of the joint portion in a cross-sectional view will be described. FIG. 1 shows a steel sheet pile in which such a depression is formed. This steel sheet pile includes a horizontal web 1 in a cross-sectional view, a
図2は嵌合させた一対の継手部の断面図を示す。継手部3の窪み4には断面円形状の止水材6(水膨張性弾性ゴムシール材)の大部分が収容される。互いに対向する鋼矢板の継手部3,3は、地盤への打設時の作業性を考慮して嵌合させたときに、一方の継手部3の爪底部内面と、他方の継手部3の爪先端部5の外面との間に隙間が発生するように作られている。U型の鋼矢板の場合、図2(A)に示される中立状態の場合では、2〜5mm程度の隙間量gnが発生する。一方、図2(B)に示されるように、隣接する鋼矢板の嵌合状態が最も圧縮側になると継手部3,3内に10mm前後の隙間が発生する。嵌合状態が最も圧縮側になったときに継手部3,3間に生じる隙間を最大隙間量gmaxと定義する。
FIG. 2 shows a cross-sectional view of the pair of joint portions fitted. The
図3に示されるように、止水材6が水膨潤後、継手部間の隙間が最大になったときに漏水が発生しないためには、止水材6と継手部との接触応力が鋼矢板の両側の水圧差(止水材に作用する作用水圧Pw)を上回ることが必要である。逆にいえば、水圧差が接触応力σを上回ってしまうと止水材6が変形して水が漏れることになる。この止水の原理を本発明の設計方法に適用する。
As shown in FIG. 3, in order for water leakage not to occur when the gap between the joints becomes maximum after the
以下具体的な設計方法について説明する。まず、所定の厚さ及び材質の水膨潤性止水材を用いた場合における、継手部間の隙間と、継手部と水膨潤後の水膨潤性止水材との接触応力との関係を求める。この実施形態では、止水材の接触応力を評価するため、継手部の窪みを模した試験体を製作し、水膨張性弾性ゴムシール材からなる止水材を2週間水に浸し、水膨潤させた状態で隙間量と反力との関係を測定した。止水材の断面は円形(この場合円の直径が厚さに相当する)である。隙間量に応じて接触面積が変化するため、各荷重段階において止水材両端部における接触長をも計測している。図4は試験装置の概要図を示す。 A specific design method will be described below. First, the relationship between the gap between the joints and the contact stress between the joint and the water-swellable water-swelled material after water swelling when a water-swellable water-proof material of a predetermined thickness and material is used is obtained. . In this embodiment, in order to evaluate the contact stress of the water-stopping material, a test body simulating the depression of the joint is manufactured, and the water-stopping material made of a water-expandable elastic rubber seal material is immersed in water for 2 weeks to swell the water. In this state, the relationship between the gap amount and the reaction force was measured. The cross-section of the water blocking material is circular (in this case, the diameter of the circle corresponds to the thickness). Since the contact area changes according to the gap amount, the contact lengths at both ends of the water stop material are also measured at each load stage. FIG. 4 shows a schematic diagram of the test apparatus.
図5は、継手部の窪みに断面円形の止水材を収容した場合の、継手間の隙間量と止水材の接触応力との関係をプロットしたものである。止水材の直径が8mm以下になると止水が困難になり、18mm以上になると鋼矢板を製造することが困難になる。このため止水材の直径は8mm、12mm、18mmの3種類を用意した。対応する窪みの内径はそれぞれ8mm、12mm、17mmとしている。またそれぞれの径の試験体において、窪みの開口幅を内径と同じ寸法にしたものと、内径よりわずかに狭くした2タイプで試験を行った。窪みの深さもパラメータとして考えられるが、製造可能な深さの範囲内で止水材の突出量hが1〜2mm程度(図2参照)になるように決定した。この突出量は、継手部の嵌合状態が中立のときに水膨張していない止水材が対向する継手部に接触しないように決めている。図5には窪みの開口幅を内径と同じ寸法としたタイプの隙間量と接触応力との関係を示す。図5には示されていないが、開口幅の影響は隙間量が2mm以下と小さい場合を除き、比較的影響は少なかった。この図5によれば、一般に隙間量が大きくなれば止水材に発生する接触応力が大きくなるのがわかる。 FIG. 5 plots the relationship between the amount of clearance between joints and the contact stress of the water stop material when a water stop material having a circular cross section is accommodated in the recess of the joint portion. When the water-stopping material has a diameter of 8 mm or less, water-stopping becomes difficult. When the diameter of the water-stopping material is 18 mm or more, it is difficult to manufacture a steel sheet pile. For this reason, the diameter of a water stop material prepared three types, 8 mm, 12 mm, and 18 mm. The inner diameters of the corresponding recesses are 8 mm, 12 mm, and 17 mm, respectively. Moreover, the test body of each diameter was tested by the type which made the opening width of the hollow the same dimension as an internal diameter, and two types slightly narrower than the internal diameter. Although the depth of the dent is also considered as a parameter, the depth h of the water-stopping material is determined to be about 1 to 2 mm (see FIG. 2) within the range of the depth that can be manufactured. The amount of protrusion is determined so that the water stop material that is not water-expanded does not contact the opposing joint when the fitting state of the joint is neutral. FIG. 5 shows the relationship between the contact stress and the gap amount of the type in which the opening width of the depression is the same as the inner diameter. Although not shown in FIG. 5, the effect of the opening width was relatively small except when the gap amount was as small as 2 mm or less. According to FIG. 5, it can be seen that, generally, the contact stress generated in the waterstop material increases as the gap amount increases.
次に、継手部と水膨潤後の水膨潤性止水材の接触応力が鋼矢板の両側での水圧差を上回るように、継手部間の最大隙間、水膨潤性止水材の直径を求める。目標とする止水圧を例えば0.2MPa(20mの水頭差の相当)とすると、接触応力が止水圧を上回るために必要な最大許容隙間量が求まる。このときゴムシール材径と最大許容隙間量の関係をプロットしたところ、図6に示されるような関係が得られる。この図6から鋼矢板の両側での水圧差が0.2MPaの条件で止水可能な隙間量の最大値と止水材の直径との関係が得られる。以上の方法により、継手の嵌合状態によらず、所定の水圧差で漏水が発生しない止水材の直径と継手の隙間量の最大値の関係が得られる。なお、求められた最大許容隙間量以下の鋼矢板を使用すればよいことになるが、鋼矢板の最大許容隙間量を調整する場合、継手部の爪部先端の折り曲げ角度を変化させてもよいし、継手部の厚みを厚くしてもよい。 Next, the maximum gap between the joints and the diameter of the water-swellable water-stopping material are determined so that the contact stress between the joint and the water-swellable water-stopping material after water swelling exceeds the water pressure difference on both sides of the steel sheet pile. . If the target water stop pressure is 0.2 MPa (corresponding to a water head difference of 20 m), for example, the maximum allowable gap amount required for the contact stress to exceed the water stop pressure is obtained. At this time, when the relationship between the rubber seal material diameter and the maximum allowable gap amount is plotted, the relationship as shown in FIG. 6 is obtained. From FIG. 6, the relationship between the maximum value of the gap amount that can be stopped when the water pressure difference between both sides of the steel sheet pile is 0.2 MPa and the diameter of the water stop material is obtained. By the above method, the relationship between the diameter of the water-stopping material that does not cause water leakage due to a predetermined water pressure difference and the maximum value of the gap amount of the joint is obtained regardless of the fitting state of the joint. In addition, it is only necessary to use a steel sheet pile having a maximum allowable gap amount or less, but when adjusting the maximum allowable gap amount of the steel sheet pile, the bending angle of the joint claw tip may be changed. However, the thickness of the joint portion may be increased.
また図6に示されるように、止水材の直径を大きくした方が、継手の許容隙間量が大きくなり、鋼矢板の製造や地盤への打設時の施工性において有利である。しかし、水膨潤前の止水材の体積が大きい場合、地盤への打設時に継手部の嵌合抵抗が増加したり、対向する継手部や地盤との摩擦により止水材が剥離・損傷したりする。そこで図2に示されるように、継手部3の一部に窪み4を設け、止水材6の大部分を収容する。これにより、継手部3の他方と水膨潤前の止水材6との隙間を増加させ、且つ止水材6の厚さを増加させる。
Also, as shown in FIG. 6, increasing the diameter of the water stop material increases the allowable clearance of the joint, which is advantageous in terms of workability when manufacturing steel sheet piles and placing on the ground. However, when the volume of the water-stopping material before water swelling is large, the fitting resistance of the joint part increases when placing on the ground, or the water-stopping material peels and damages due to friction with the opposing joint part or the ground. Or Therefore, as shown in FIG. 2, a
次に断面視で継手部の爪底部の内面側に窪みが形成されないU型の鋼矢板を設計する例について説明する。U型の鋼矢板自体は上記図1に示される鋼矢板と同じ構造であるが、継手部に窪みが形成されていない点が異なる。図7は窪みが形成されていない鋼矢板の継手部が嵌合した状態を示す。一方の継手部3の爪底部内面と、他方の継手部3の爪先端部5の外面との間に隙間が空けられている。隣接する鋼矢板の嵌合状態が最も圧縮側になると継手部3,3内に10mm前後の隙間が発生する。継手部3の爪底部内面側には、体積膨脹率が5倍程度の湿気硬化型の特殊ポリウレタン樹脂製の止水材7が塗布される。
Next, an example of designing a U-shaped steel sheet pile in which no recess is formed on the inner surface side of the claw bottom portion of the joint portion in a cross-sectional view will be described. The U-shaped steel sheet pile itself has the same structure as that of the steel sheet pile shown in FIG. 1 except that a recess is not formed in the joint portion. FIG. 7 shows a state in which a joint portion of a steel sheet pile in which no depression is formed is fitted. A gap is formed between the inner surface of the claw bottom portion of one
図8はこの止水材を塗布した場合の、継手部の隙間量と止水材の接触応力の関係をプロットしたものである。この図8によれば、隙間量が大きくなれば止水材に発生する接触応力が小さくなるのがわかる。また隙間量が同じであれば、止水材の塗布厚が大きいほど接触応力は大きくなる。 FIG. 8 is a plot of the relationship between the joint clearance and the contact stress of the water stop material when this water stop material is applied. According to FIG. 8, it can be seen that the contact stress generated in the water-stopping material decreases as the gap amount increases. If the gap amount is the same, the contact stress increases as the coating thickness of the water-stopping material increases.
この図から止水材の接触応力が0.2MPaになる許容隙間量を読み取り、止水材の塗布厚さを横軸としてプロットしたのが図9である。この図9から継手部の両側での水圧差が例えば0.2MPaの条件で止水可能な許容隙間量の最大値と止水材の塗布厚との関係が得られる。 FIG. 9 is a graph in which the allowable gap amount at which the contact stress of the waterstop material becomes 0.2 MPa is read from this figure and the coating thickness of the waterstop material is plotted on the horizontal axis. From FIG. 9, the relationship between the maximum value of the allowable gap amount that can be stopped when the water pressure difference between both sides of the joint portion is 0.2 MPa, for example, and the coating thickness of the water blocking material is obtained.
なお上記実施形態では、ラルゼン継手を有する鋼矢板を用いた例で説明したが、本発明では、ラルゼン継手を有する鋼矢板に限られることなく、直線型継手を有する鋼矢板を用いてもよい。 In addition, although the said embodiment demonstrated by the example using the steel sheet pile which has a Larsen joint, in this invention, you may use the steel sheet pile which has not only a steel sheet pile which has a Larsen joint but a linear joint.
3…継手部
6,7…止水材
gn…隙間量
gmax…最大隙間量
Pw…作用水圧(水圧差)
σ…接触応力
3 ...
σ ... Contact stress
Claims (7)
鋼矢板の嵌合状態によって継手部間に最大隙間が生じたときにも、継手部と水膨潤後の水膨潤性止水材の接触応力が鋼矢板の両側での水圧差を上回るように、継手部間の最大隙間、水膨潤性止水材の厚さ及び材質を設計することを特徴とする遮水壁用鋼矢板の継手部の設計方法。 In the design method of the joint portion of the steel sheet pile for the water-impervious wall that restrains the water-swellable waterproofing material between the joint portions facing each other of the steel sheet pile,
Even when the maximum gap is generated between the joints due to the fitting state of the steel sheet pile, so that the contact stress between the joint part and the water-swellable water stop material after water swelling exceeds the water pressure difference on both sides of the steel sheet pile, A design method for a joint portion of a steel sheet pile for a water shielding wall, wherein the maximum gap between the joint portions, the thickness and the material of the water-swellable waterproofing material are designed.
鋼矢板の嵌合状態によって継手部間に最大隙間が生じたときにも、継手部と水膨潤後の水膨潤性止水材の接触応力が鋼矢板の両側での水圧差を上回ることを特徴とする遮水壁用鋼矢板の継手部構造。 In the joint part structure of the steel sheet pile for the impermeable wall that restrains the water-swellable water-stopping material between the joint parts facing each other of the steel sheet pile,
The contact stress between the joint and the water-swellable water-swelling material after water swelling exceeds the water pressure difference on both sides of the steel sheet pile even when the maximum gap is generated between the joints due to the fitting state of the steel sheet piles. The joint part structure of the steel sheet pile for impermeable walls.
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2010084369A (en) * | 2008-09-30 | 2010-04-15 | Electric Power Dev Co Ltd | Pouring management device of steel sheet pile and pouring management method therefor |
JP2015175214A (en) * | 2014-03-18 | 2015-10-05 | 新日鐵住金株式会社 | Water conduction quantity control member |
WO2020149269A1 (en) * | 2019-01-18 | 2020-07-23 | 日本化学塗料株式会社 | Curable water-swelling waterstop material, waterstop steel sheet pile, waterstop steel sheet pile production method, and water-stopping method |
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2003
- 2003-10-06 JP JP2003347468A patent/JP2005113464A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2010084369A (en) * | 2008-09-30 | 2010-04-15 | Electric Power Dev Co Ltd | Pouring management device of steel sheet pile and pouring management method therefor |
JP2015175214A (en) * | 2014-03-18 | 2015-10-05 | 新日鐵住金株式会社 | Water conduction quantity control member |
WO2020149269A1 (en) * | 2019-01-18 | 2020-07-23 | 日本化学塗料株式会社 | Curable water-swelling waterstop material, waterstop steel sheet pile, waterstop steel sheet pile production method, and water-stopping method |
JPWO2020149269A1 (en) * | 2019-01-18 | 2021-10-14 | 日本化学塗料株式会社 | Curable water expansion water stop material, water stop steel sheet pile, water stop steel sheet pile manufacturing method and water stop method |
EP3926097A4 (en) * | 2019-01-18 | 2022-10-12 | Nippon Chemical Paint Co., Ltd. | Curable water-swelling waterstop material, waterstop steel sheet pile, waterstop steel sheet pile production method, and water-stopping method |
JP7264509B2 (en) | 2019-01-18 | 2023-04-25 | 日本化学塗料株式会社 | Water-swelling water-stopping material hardening, water-stopping steel sheet pile, water-stopping steel sheet pile manufacturing method, and water-stopping construction method |
US12043739B2 (en) | 2019-01-18 | 2024-07-23 | Nippon Chemical Paint Co., Ltd. | Curable water-swelling waterstop material, waterstop steel sheet pile, waterstop steel sheet pile production method, and water-stopping method |
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