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JP7310557B2 - Impermeable wall and revetment wall - Google Patents
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JP7310557B2 - Impermeable wall and revetment wall - Google Patents

Impermeable wall and revetment wall Download PDF

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JP7310557B2
JP7310557B2 JP2019204589A JP2019204589A JP7310557B2 JP 7310557 B2 JP7310557 B2 JP 7310557B2 JP 2019204589 A JP2019204589 A JP 2019204589A JP 2019204589 A JP2019204589 A JP 2019204589A JP 7310557 B2 JP7310557 B2 JP 7310557B2
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water
impermeable
wall
waterproof
cartridge
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JP2021075935A (en
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龍平 長野
英夫 杉本
潔司 十河
健司 大西
良太 日野
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Obayashi Corp
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Description

本発明は、洪水対策や氾濫対策のために設置する遮水壁及び護岸壁に関する。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to impermeable walls and revetment walls installed for countermeasures against flooding and flooding.

台風や豪雨による河川の洪水対策や湖、池の氾濫対策としては、排水設備を有したコンクリート製の遮水壁を事前に設置しておくか、予報によって被害が危惧される場合に、遮水パネル(例えば、特許文献1参照)、土嚢、吸水性土嚢(例えば、特許文献2参照)等を設置していた。 As a countermeasure against flooding of rivers and lakes and ponds due to typhoons and heavy rains, impermeable walls made of concrete with drainage facilities should be installed in advance, or impermeable panels should be installed when forecasts indicate that damage is likely to occur. (See Patent Document 1, for example), sandbags, water-absorbing sandbags (see Patent Document 2, for example), and the like.

特開2014-37726号公報JP 2014-37726 A 特開2019-52427号公報JP 2019-52427 A

しかしながら、コンクリート製の遮水壁の設置は、景観を悪化させると共に、遮水壁によって通常時においても生物の往来が遮られるため、生態系に悪影響を与えてしまう。また、洪水などの有事の際に遮水パネル、土嚢、吸水性土嚢を設置することは、危険を伴う重労働であった。すなわち、事前に土を詰めたり、水を吸水させたりした重い土嚢を悪天候の中で所定の場所に運んで設置しなければならなかった。 However, the installation of impermeable walls made of concrete deteriorates the landscape and adversely affects the ecosystem because the impermeable walls block the traffic of organisms even in normal times. In addition, installing impermeable panels, sandbags, and absorbent sandbags in emergencies such as flooding was dangerous and hard work. That is, heavy sandbags filled with soil or soaked with water in advance had to be transported to a predetermined location in bad weather and installed.

本発明は、このような状況に鑑みてなされたものであり、上述の課題を解消し、景観及び生態系を保全できる遮水壁及び護岸壁を提供することにある。 SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object of the present invention is to provide an impermeable wall and a revetment wall that can solve the above-described problems and preserve landscapes and ecosystems.

本発明の遮水壁は、設置方向を横切る遮水方向に間隔をおいて配置された一対の蛇篭部と、一対の前記蛇篭部の間に装着される遮水カートリッジとを具備し、前記遮水カートリッジは、前記遮水方向の側面に開口が形成された箱状の筐体を有し、前記筐体内には、水を含むことによって膨張する複数の水膨潤部材が間隔をおいて配置され、前記水膨潤部材が膨潤前には、前記遮水方向に貫通する間隙が存在し、前記水膨潤部材が膨張後には、前記遮水方向に貫通する前記間隙が閉ざされることを特徴とする。
さらに、本発明の遮水壁において、前記遮水カートリッジは、上方及び下方からの前記筐体内への水の浸入を防止する防水部を備えても良い。
また、本発明の護岸壁は、蛇篭を段積して構築された護岸壁であって、上述の遮水壁が最上段に構築されていることを特徴とする
A water impermeable wall of the present invention comprises a pair of gabion sections spaced apart in a water impermeable direction that traverses an installation direction, and a water impermeable cartridge mounted between the pair of gabion sections. The water cartridge has a box-shaped housing with an opening formed on a side surface in the waterproof direction, and a plurality of water-swelling members that expand when containing water are arranged at intervals in the housing. A gap penetrating in the impervious direction exists before the water swelling member is swollen, and the gap penetrating in the impervious direction is closed after the water swelling member is swollen.
Further, in the impermeable wall of the present invention, the impermeable cartridge may include a waterproof section that prevents water from entering the housing from above and below.
Further, the revetment wall of the present invention is a revetment wall constructed by stacking gabions in stages, and is characterized in that the above impermeable wall is constructed on the uppermost stage.

本発明によれば、蛇篭部による景観保全と、遮水方向に貫通する間隙による環境保全と、地盤の変状に追随したり水圧に耐える機能とを確保した状態で、越水に備える遮水壁を設置できるという効果を奏する。 According to the present invention, the gabion part protects the scenery, the environment is protected by the gap that penetrates in the impermeable direction, and the function to follow the deformation of the ground and withstand the water pressure is secured, and the impermeable water impermeable to prepare for overflow. The effect that a wall can be installed is produced.

本発明に係る遮水壁の構成例を示す斜視図である。1 is a perspective view showing a configuration example of a water impermeable wall according to the present invention; FIG. 図1に示す遮水壁の分解斜視図である。FIG. 2 is an exploded perspective view of the impermeable wall shown in FIG. 1; 図2に示す遮水カートリッジ内の構成例を示す斜視図である。FIG. 3 is a perspective view showing a configuration example inside the waterproof cartridge shown in FIG. 2 ; 図3に示す水膨潤部材の膨潤前の状態を示す図である。4 is a diagram showing a state before swelling of the water-swellable member shown in FIG. 3; FIG. 図3に示す水膨潤部材の膨潤後の状態を示す図である。4 is a diagram showing a state after swelling of the water-swellable member shown in FIG. 3; FIG. 図3に示す水膨潤部材の他の構成例を示す図である。4 is a diagram showing another configuration example of the water-swollen member shown in FIG. 3; FIG. 図3に示す水膨潤部材の他の構成例を示す図である。4 is a diagram showing another configuration example of the water-swollen member shown in FIG. 3; FIG.

次に、本発明を実施するための形態(以下、単に「実施形態」という)を、図面を参照して具体的に説明する。 Next, modes for carrying out the present invention (hereinafter simply referred to as "embodiments") will be specifically described with reference to the drawings.

本実施形態の遮水壁1は、図1を参照すると、河川、湖沼池等からの越水対策として、岸辺に護岸壁100として構築された蛇篭10の上部に段積によって設置される。換言すると、蛇篭10を段積して構築された護岸壁100の最上段に、遮水壁1が構築されている。 Referring to FIG. 1, the impermeable wall 1 of this embodiment is installed in steps above a gabion 10 constructed as a revetment wall 100 on the shore as a countermeasure against overtopping from rivers, lakes and ponds. In other words, the impermeable wall 1 is constructed on the uppermost step of the revetment wall 100 constructed by stacking the gabions 10 .

蛇篭10は、竹材や鉄線で編んだ篭本体の内部に栗石や解体ガラ等の充填物を充填したものである。複数の蛇篭10を岸辺に沿って横に並べると共に、上下に複数段段積することにより、護岸壁100が構築される。蛇篭10を用いた護岸壁100は、非常に強固で通水性に勝れ、充填物間に生物の良好な生育環境が確保されるという利点を有する。 The gabion 10 is made by filling the inside of the gabion body woven with bamboo material or iron wire with a filling such as cobble stone or dismantled debris. A revetment wall 100 is constructed by arranging a plurality of gabions 10 horizontally along the shore and stacking them vertically in a plurality of stages. The revetment wall 100 using the gabion 10 has the advantage that it is very strong, has excellent water permeability, and ensures a favorable growing environment for organisms between the fillings.

遮水壁1は、図2を参照すると、一対の蛇篭部2と、一対のガイド板3と、遮水カートリッジ4とを備えている。 The impermeable wall 1 comprises a pair of gabion sections 2, a pair of guide plates 3, and a impermeable cartridge 4, as shown in FIG.

蛇篭部2は、蛇篭10と同様に、竹材や鉄線で編んだ篭本体の内部に栗石や解体ガラ等の充填物を充填したものであり、一対の蛇篭部2が、遮水壁1の設置方向を横切る遮水方向に間隔をおいて配置される。これにより、蛇篭10と遮水壁1の蛇篭部2とが連なって一体感が創出され、優れた景観を演出することができる。 Like the gabion 10, the gabion 2 is made by filling the inside of the gabion main body woven with bamboo material or iron wire with a filling such as cobble stone or dismantled waste. are spaced apart in the impervious direction transverse to the direction. As a result, the gabion 10 and the gabion part 2 of the impermeable wall 1 are connected to create a sense of unity, and an excellent landscape can be produced.

ガイド板3は、複数の開口31が形成された合成樹脂製の板状部材であり、一対のガイド板3が一対の蛇篭部2の対向面にそれぞれ取り付けられている。これにより、一対のガイド板3は、遮水方向に間隔をおいて配置され、一対のガイド板3で挟まれた間隙が遮水カートリッジ4を装着する装着部となる。 The guide plate 3 is a synthetic resin plate-like member having a plurality of openings 31 formed therein. As a result, the pair of guide plates 3 are arranged with a gap in the waterproof direction, and the gap sandwiched between the pair of guide plates 3 serves as a mounting portion for mounting the waterproof cartridge 4 .

遮水カートリッジ4は、装着時にガイド板3と対向する両側面に、ガイド板3の開口31と連通する開口41がそれぞれ形成されている箱状の筐体40を有している。なお、ガイド板3及び遮水カートリッジ4の開口41の形状や数は任意であり、ガイド板3の開口31と遮水カートリッジ4とで開口41の形状や数を一致させる必要もない。 The waterproof cartridge 4 has a box-shaped housing 40 in which openings 41 communicating with the openings 31 of the guide plate 3 are formed on both side surfaces facing the guide plate 3 when mounted. The shape and number of the openings 41 of the guide plate 3 and the waterproof cartridge 4 are arbitrary, and the shapes and numbers of the openings 41 of the guide plate 3 and the waterproof cartridge 4 do not need to match.

筐体40の内部には、図3を参照すると、複数の水膨潤部材5が間隔をおいて配置されている。水膨潤部材5は、水を含むことによって所定の倍率で膨張する部材である。水膨潤部材5としては、吸収性ポリマー、高吸水性樹脂、高分子吸収体などと呼称される吸水性を有する吸水性高分子材料や、水膨潤ゴム、モンモリロナイトを主成分鉱物とするベントナイト等を用いることができる。 Inside the housing 40, referring to FIG. 3, a plurality of water swelling members 5 are arranged at intervals. The water-swellable member 5 is a member that expands at a predetermined magnification when it contains water. As the water-swelling member 5, a water-absorbing high-molecular material having water-absorbing properties called an absorbent polymer, a super-absorbent resin, a high-molecular absorbent, or the like, a water-swelling rubber, or a bentonite containing montmorillonite as a main component mineral, or the like is used. can be used.

遮水カートリッジ4において、上面と上面に連なる側面の所定範囲と、下面と下面に連なる側面の所定範囲とには、防水加工が施され、上方及び下方から筐体40内への水(雨水等)の浸入を防止する防水部として機能する。なお、遮水カートリッジ4の上面側と下面側とをそれぞれ覆う防水カバーを防水部として設けても良い。 In the waterproof cartridge 4, a predetermined range of the upper surface and the side surface connecting to the upper surface and a predetermined range of the lower surface and the side surface connecting to the lower surface are waterproofed to prevent water (rainwater, etc.) from entering the housing 40 from above and below. ) function as a waterproof part to prevent the intrusion of In addition, a waterproof cover may be provided as a waterproof section to cover the upper surface side and the lower surface side of the waterproof cartridge 4, respectively.

本実施形態の水膨潤部材5は、図3を参照すると、板状に構成され、格子状の支持部材6の頂点に、遮水方向から見て千鳥状に配置されている。図3に示す例では、2台の支持部材6を用いることで、水膨潤部材5が遮水方向に3層で配置されている。 Referring to FIG. 3, the water-swollen members 5 of the present embodiment are plate-shaped and arranged in a zigzag manner at the vertices of the lattice-shaped support member 6 when viewed from the impervious direction. In the example shown in FIG. 3, by using two supporting members 6, the water swelling members 5 are arranged in three layers in the impervious direction.

図4は、水膨潤部材5に水が含まれていない膨潤前の状態が示されている。図4において、(a)は遮水方向から遮水カートリッジ4を見た図であり、(b)は(a)に示すX-X断面図であり、(c)は(a)に示すY-Y断面図である。図4に示すように、水膨潤部材5が膨潤前の状態では、遮水カートリッジ4には、側面に形成された開口41を介して遮水方向に貫通する間隙が存在する。 FIG. 4 shows a pre-swelling state in which the water-swellable member 5 does not contain water. In FIG. 4, (a) is a view of the impervious cartridge 4 as seen from the impermeable direction, (b) is a cross-sectional view along the line XX shown in (a), and (c) is a Y -Y sectional view. As shown in FIG. 4, before the water-swelling member 5 is swollen, the water-impervious cartridge 4 has a gap penetrating in the water-impervious direction through the opening 41 formed on the side surface.

従って、通常時には、蛇篭部2の充填物の間隙を生息場所とする生物が遮水カートリッジ4を通って遮水方向に行き来することができるため、生態系が保全される。 Therefore, normally, organisms living in the gaps of the filling of the gabion part 2 can come and go through the impermeable cartridge 4 in the impermeable direction, thus preserving the ecosystem.

図5は、水膨潤部材5に水が含まれている膨潤後の状態が示されている。図5において、(a)は遮水方向から遮水カートリッジ4を見た図であり、(b)は(a)に示すX-X断面図であり、(c)は(a)に示すY-Y断面図である。図5に示すように、水膨潤部材5が膨潤後の状態では、膨潤した遮水カートリッジ4によって遮水方向に貫通する間隙が閉ざされ、遮水カートリッジ4が遮水壁として機能する。なお、遮水カートリッジ4は、一対の蛇篭部2の間に配置されているため、強度も確保される。 FIG. 5 shows the state after swelling in which water is contained in the water swelling member 5 . In FIG. 5, (a) is a view of the water impermeable cartridge 4 viewed from the water impermeable direction, (b) is an XX cross-sectional view shown in (a), and (c) is a Y shown in (a). -Y sectional view. As shown in FIG. 5, after the water-swollen member 5 is swollen, the gap penetrating in the water-impervious direction is closed by the swollen water-impervious cartridge 4, and the water-impervious cartridge 4 functions as a water-impermeable wall. Since the waterproof cartridge 4 is arranged between the pair of gabion portions 2, its strength is also ensured.

従って、河川、湖沼池等からの越水が発生し、蛇篭部2及びガイド板3を介して遮水カートリッジ4の筐体40内に水が侵入すると、水膨潤部材5が膨潤し、遮水カートリッジ4が遮水壁として機能する。例えば、遮水壁1を池の周囲に設置した場合、越水の発生によって、遮水カートリッジ4が遮水壁として機能し、池の貯水量を増加させることができる。 Therefore, when water overflows from rivers, lakes and ponds, etc., and water enters the housing 40 of the impermeable cartridge 4 via the gabion part 2 and the guide plate 3, the water swelling member 5 swells and impermeable. The cartridge 4 functions as a waterproof wall. For example, when the impermeable wall 1 is installed around a pond, the impermeable cartridge 4 functions as an impermeable wall when water overflows, and the amount of water stored in the pond can be increased.

膨潤前の通常時に遮水方向に貫通する間隙が存在し、膨張後に遮水方向に貫通する間隙が閉ざされるのであれば、水膨潤部材5の形状や数、配置方法は、任意である。 The shape, number, and arrangement of the water-swollen members 5 are arbitrary as long as there is a gap penetrating in the impervious direction normally before swelling, and the gap penetrating in the impervious direction is closed after expansion.

図6に示すように、水膨潤部材5に代えて、円筒状の水膨潤部材5aを用いても良い。水膨潤部材5aとしては、例えば、立体網目形状のポリプロピレン等の合成樹脂を筒状に成型した基材に吸水性高分子材料を配合(吹付けやノリで付着させる)したものを用いることができる。図6において、(a)は水膨潤部材5aの構成例を示す斜視図であり、(b)は水膨潤部材5aの膨潤前の状態を示す図であり、(c)は水膨潤部材5aの膨潤後の状態を示す図である。 As shown in FIG. 6, instead of the water swelling member 5, a cylindrical water swelling member 5a may be used. As the water-swollen member 5a, for example, a material obtained by blending (adhering by spraying or gluing) a water-absorbing polymer material to a base material obtained by molding synthetic resin such as polypropylene having a three-dimensional mesh shape into a cylindrical shape can be used. . In FIG. 6, (a) is a perspective view showing a configuration example of the water-swelling member 5a, (b) is a view showing the state before swelling of the water-swelling member 5a, and (c) is a view showing the water-swelling member 5a. It is a figure which shows the state after swelling.

また、図7に示すように、水膨潤部材5に代えて、吸水性高分子材料を収納する不織布7で構成された水膨潤部材5bを用いても良い。水膨潤部材5bとしては、例えば、吸水性高分子材料を収納する複数の収納部71と複数の開口72とが形成された2枚の不織布7を、収納部71に吸水性高分子材料を収納した状態で貼り合わせた構成を採用することができる。図7において、(a)は水膨潤部材5bの膨潤前の状態を示す図であり、(b)は水膨潤部材5bの膨潤後の状態を示す図である。 Further, as shown in FIG. 7, instead of the water-swellable member 5, a water-swellable member 5b composed of a non-woven fabric 7 containing a water-absorbing polymer material may be used. As the water-swollen member 5b, for example, two nonwoven fabrics 7 having a plurality of storage portions 71 for storing the water-absorbing polymer material and a plurality of openings 72 are formed. It is possible to employ a configuration in which the substrates are bonded together in a state where they are bonded together. In FIG. 7, (a) is a diagram showing the state before the water swelling member 5b is swollen, and (b) is a diagram showing the state after the swelling of the water swelling member 5b.

本実施形態では、遮水壁1を護岸壁100として構築された蛇篭10の上部に設置した例について説明したが、遮水壁1は、敷地内の所定エリアを囲むように設置しても一定の効果が得られる。この場合、雨を一時貯留する貯留池として、遮水壁1で囲んだ所定エリアを用いることができる。敷地内での一時貯留量が増えたことで、桝や雨水貯留槽等に急激に流入する雨量が減少する。その結果、貯留槽等の許容貯水容量が増加し、想定以上の豪雨に対応することができる。 In the present embodiment, an example in which the impermeable wall 1 is installed above the gabion 10 constructed as the revetment wall 100 has been described. effect is obtained. In this case, a predetermined area surrounded by impermeable wall 1 can be used as a reservoir for temporarily storing rain. Due to the increase in the amount of temporary storage on the site, the amount of rain that suddenly flows into the basin, rainwater storage tank, etc. will decrease. As a result, the allowable water storage capacity of the storage tank, etc., is increased, making it possible to cope with heavy rainfall that exceeds expectations.

以上説明したように、本実施形態は、設置方向を横切る遮水方向に間隔をおいて配置された一対の蛇篭部2と、一対の蛇篭部2の間に装着される遮水カートリッジ4とを具備し、遮水カートリッジ4は、遮水方向の側面に開口41が形成された箱状の筐体40を有し、筐体40内には、水を含むことによって膨張する複数の水膨潤部材5が間隔をおいて配置され、水膨潤部材5が膨潤前には、遮水方向に貫通する間隙が存在し、水膨潤部材5が膨張後には、遮水方向に貫通する間隙が閉ざされる。
この構成により、蛇篭部2による景観保全と、遮水方向に貫通する間隙による環境保全と、地盤の変状に追随したり水圧に耐える機能とを確保した状態で、越水に備える遮水壁を設置できる。従って、豪雨予報が発表された際、遮水板や土嚢を設置する必要がなく、遮水壁1を豪雨時の対応として事前に設置しておくことで付加価値を加えることができる。
さらに、膨潤した水膨張部材5は、晴天などの乾燥状態が継続すると自動的に収縮する。その後、次の降雨時にも膨潤することができるため、一定期間は繰り返し利用が可能になる。
As described above, in the present embodiment, a pair of gabions 2 arranged with a gap in the impervious direction crossing the installation direction, and the impermeable cartridge 4 mounted between the pair of gabions 2 The waterproof cartridge 4 has a box-shaped housing 40 with an opening 41 formed on the side surface in the waterproof direction. Before the water-swollen member 5 swells, there is a gap penetrating in the water-impervious direction, and after the water-swollen member 5 expands, the gap penetrating in the water-impervious direction is closed.
With this configuration, the impermeable wall is prepared for overtopping while ensuring landscape preservation by the gabion part 2, environmental preservation by the gap penetrating in the impermeable direction, and the function of following the deformation of the ground and withstanding the water pressure. can be installed. Therefore, when a heavy rain forecast is announced, there is no need to install impermeable plates or sandbags, and the impermeable wall 1 can be installed in advance as a countermeasure against heavy rain, adding value.
Further, the swollen water-expansion member 5 automatically shrinks when dry conditions such as fine weather continue. After that, it can swell even when it rains next time, so it can be used repeatedly for a certain period of time.

さらに、本実施形態において、遮水カートリッジ4は、上方及び下方からの筐体40内への水の浸入を防止する防水部を備えている。
この構成により、越水に備えて事前に遮水壁1を設置しておいても、雨水や地面からの湿気による水膨潤部材5の膨潤を防止することができ、いつ発生するかわからない越水にう容易に対応することができる。
Furthermore, in this embodiment, the water-impermeable cartridge 4 includes a waterproof section that prevents water from entering the housing 40 from above and below.
With this configuration, even if the impermeable wall 1 is installed in advance for the overflow, the water swelling member 5 can be prevented from swelling due to rainwater or humidity from the ground, and the overflow can occur at any time. You can easily deal with it.

さらに、本実施形態は、蛇篭10を段積して構築された護岸壁100であって、遮水壁1が最上段に構築されている。
この構成により、蛇篭10と遮水壁1の蛇篭部2とが連なって一体感が創出され、優れた景観を演出することができる。
Further, in this embodiment, the revetment wall 100 is constructed by stacking gabions 10 in stages, and the impermeable wall 1 is constructed on the uppermost stage.
With this configuration, the gabion 10 and the gabion part 2 of the impermeable wall 1 are connected to create a sense of unity, and an excellent landscape can be produced.

以上、実施形態をもとに本発明を説明した。この実施形態は例示であり、それらの各構成要素の組み合わせ等にいろいろな変形例が可能なこと、またそうした変形例も本発明の範囲にあることは当業者に理解されるところである。 The present invention has been described above based on the embodiments. It should be understood by those skilled in the art that this embodiment is an example, and that various modifications can be made to the combination of each component, etc., and that such modifications are also within the scope of the present invention.

1 遮水壁
2 蛇篭部
3 ガイド板
4 遮水カートリッジ
5、5a、5b 水膨潤部材
6 支持部材
7 不織布
10 蛇篭
31 開口
40 筐体
41 開口
43 不織布
71 収納部
72 開口
100 護岸壁
Reference Signs List 1 impermeable wall 2 gabion portion 3 guide plate 4 impervious cartridges 5, 5a, 5b water swelling member 6 support member 7 nonwoven fabric 10 gabion 31 opening 40 housing 41 opening 43 nonwoven fabric 71 storage portion 72 opening 100 revetment wall

Claims (3)

設置方向を横切る遮水方向に間隔をおいて配置された一対の蛇篭部と、
一対の前記蛇篭部の間に装着される遮水カートリッジとを具備し、
前記遮水カートリッジは、前記遮水方向の側面に開口が形成された箱状の筐体を有し、
前記筐体内には、水を含むことによって膨張する複数の水膨潤部材が間隔をおいて配置され、前記水膨潤部材が膨潤前には、前記遮水方向に貫通する間隙が存在し、前記水膨潤部材が膨張後には、前記遮水方向に貫通する前記間隙が閉ざされることを特徴とする遮水壁。
a pair of gabions spaced apart in a water impermeable direction that traverses the installation direction;
and a waterproof cartridge mounted between the pair of gabions,
The waterproof cartridge has a box-shaped housing with an opening formed on a side surface in the waterproof direction,
A plurality of water-swellable members that swell when containing water are arranged at intervals in the housing, and before the water-swellable members swell, there are gaps penetrating in the water-impervious direction. A water impermeable wall, wherein the gap penetrating in the water impermeable direction is closed after the swelling member expands.
前記遮水カートリッジは、上方及び下方からの前記筐体内への水の浸入を防止する防水部を具備することを特徴とする請求項1記載の遮水壁。 2. The impermeable wall according to claim 1, wherein the impermeable cartridge comprises a waterproof section for preventing water from entering the housing from above and below. 蛇篭を段積して構築された護岸壁であって、
請求項1又は2記載の遮水壁が最上段に構築されていることを特徴とする護岸壁。
A revetment wall constructed by stacking gabions,
A revetment wall, wherein the impermeable wall according to claim 1 or 2 is constructed on the uppermost stage.
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