JPH0612029Y2 - Cover sheet for reclaimed seawall - Google Patents
Cover sheet for reclaimed seawallInfo
- Publication number
- JPH0612029Y2 JPH0612029Y2 JP1988138276U JP13827688U JPH0612029Y2 JP H0612029 Y2 JPH0612029 Y2 JP H0612029Y2 JP 1988138276 U JP1988138276 U JP 1988138276U JP 13827688 U JP13827688 U JP 13827688U JP H0612029 Y2 JPH0612029 Y2 JP H0612029Y2
- Authority
- JP
- Japan
- Prior art keywords
- landfill
- seawall
- sheet body
- cover sheet
- sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 230000035699 permeability Effects 0.000 claims description 4
- 239000004576 sand Substances 0.000 description 8
- 239000013535 sea water Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Description
【考案の詳細な説明】 ［産業上の利用分野］ 本考案は海岸などに埋立護岸を築造する際に埋立側の法
面に敷設される埋立護岸用被覆シートに関するものであ
る。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a cover sheet for a landfill seawall, which is laid on the slope on the landfill side when a landfill seawall is constructed on a shore or the like.
［従来の技術］ 従来、海岸等を埋立てる際に、第４図に示すように埋立
地域に沿って海上などにコンクリートブロックやケーソ
ンからなる護岸壁1aを構築し、その埋立地域Ａ側に裏込
用の土砂を投入して裏込礫層2aを形成して埋立護岸3aを
構築する方法が採られており、その際に、潮流や波浪な
どによる埋立護岸3aの崩壊、或いは裏込礫層2aや埋立土
砂の流失などを防ぐ目的で裏込礫層2aに非透水性の被覆
シート4aを敷設することが行なわれている。[Prior Art] Conventionally, when reclaiming a coast, etc., a revetment wall 1a composed of concrete blocks and caisson was constructed along the landfill area along the landfill area as shown in Fig. 4, and a backside was constructed on the side of the landfill area A. The method of constructing the landfill revetment 3a by forming the backfill gravel layer 2a by inputting the earth and sand for burying, the collapse of the landfill revetment 3a due to tidal current or waves, or the backfill gravel layer is adopted at that time. A non-water-permeable cover sheet 4a is laid on the backfill gravel layer 2a for the purpose of preventing the 2a and the landfill soil from being washed away.
そして、海側の水位が潮の満干により最低水位(L.W.L)
から最高水位(H.W.L)に変化すると海水が護岸壁1aや裏
込礫層2aの隙間を通って被覆シート4aの裏面に作用し、
隣接する被覆シート4aの互いに重なり合った端部の隙間
から埋立側Ｂに流出することにより、或いは波浪によっ
て海水が埋立護岸3aを越えて浸入することで埋立側Ｂの
水位が上昇する。Then, the water level on the sea side is the lowest water level (LWL) due to the full tide.
From the maximum water level (HWL), seawater acts on the back surface of the covering sheet 4a through the gaps between the seawall 1a and the backfill gravel layer 2a,
The water level on the landfill side B rises by flowing out to the landfill side B from the gap between the overlapping end portions of the adjacent cover sheets 4a or by seawater entering the landfill revetment 3a by waves.
そして、埋立側Ｂに流入した海水が被覆シート4aを裏込
礫層2aに押付けるため隣接する被覆シート4aの重なり合
った端部が互いに密接して海水が海側Ａに戻ることがで
きず埋立側Ｂに残留することとなる。従って、干潮によ
り海側Ａの水位が低くなったときに埋立側Ｂに残留する
海水の水圧が埋立護岸3aに作用し崩落させる虞れがあ
る。殊に潮の満干による水位差の大きな場所ではこの水
圧が大きく、また埋立側Ｂに水を多量に含む埋立土砂5a
を投入した直後はこれらの水圧と土圧とが加わって更に
大きな圧力が埋立護岸3aに作用することとなる。Then, since the seawater that has flowed into the landfill side B presses the covering sheet 4a against the backfill gravel layer 2a, the overlapping ends of the adjacent covering sheets 4a are in close contact with each other and the seawater cannot return to the seaside A, so that the landfill is completed. It will remain on side B. Therefore, when the water level on the sea side A becomes low due to low tide, the water pressure of the seawater remaining on the landfill side B may act on the landfill revetment 3a and cause it to collapse. Especially in places where the water level difference is large due to the ebb and flow of the tide, this water pressure is large, and the landfill sand 5a that contains a large amount of water on the landfill side B
Immediately after the injection of the water, these water pressures and earth pressures are applied, and a larger pressure acts on the landfill seawall 3a.
そこで、例えば特公昭47-43565号公報に提示されている
ように、非透水性を有するシート体の適所に透窓を形成
するとともにその透窓を透水性を有する閉止材で覆った
ものが開発されている。Therefore, as disclosed in, for example, Japanese Examined Patent Publication No. 47-43565, there has been developed a sheet body having a water impermeable sheet body in which a permeable window is formed at an appropriate position and the permeable window is covered with a water permeable closing material. Has been done.
この埋立護岸用被覆シートによれば、埋立護岸3aを通過
して埋立側Ｂへ流入した海水が海側Ａの水位の低下に伴
って透水性を有する閉止材で覆われた透窓を介して海側
へ流出し、海側と埋立側との水位差を解消して埋立護岸
3aの崩壊を防止することができるものである。According to this cover sheet for landfill revetment, the seawater that has passed through the landfill revetment 3a and has flowed into the landfill side B is passed through the transparent window covered with a closing material having water permeability as the water level on the sea side A decreases. Runoff to the sea side, eliminating the water level difference between the sea side and the landfill side, and reclaimed seawall
It is possible to prevent the collapse of 3a.
［考案が解決しようとする課題］ ところが、被覆シート4aが敷設される裏込礫層2aの表面
は凹凸に富んでいて被覆シート4aがなじみにくいととも
に、投入した埋立土砂5aの重量により被覆シート4aが引
張られて破断するおそれがあり、そのために被覆シート
4aを例えばポリ塩化ビニルなどの合成樹脂で作った非透
水性ならびに延伸性を有するシート体により形成し、埋
立土砂5aの重量に応じて被覆シート4aを延伸させること
により破断を防止している。[Problems to be solved by the invention] However, the surface of the backfill gravel layer 2a on which the cover sheet 4a is laid is rich in unevenness, and the cover sheet 4a is difficult to fit in, and the weight of the landfill soil 5a put into the cover sheet 4a May be pulled and broken, which is why the cover sheet
4a is formed of a sheet body made of a synthetic resin such as polyvinyl chloride and having water impermeability and stretchability, and the cover sheet 4a is stretched according to the weight of the landfill sand 5a to prevent breakage.
従って、被覆シート4aの延伸に伴って透窓も上下方向へ
引伸ばされることになるが、透窓に配置された布帛、不
織布などの透水性を有する材料による作られた閉止板は
延伸性を有していないため引き裂かれることとなり、そ
のため、透窓に大きな隙間が形成され埋立土砂5aが大量
に流出するという問題点がある。Therefore, the permeable window is also stretched in the vertical direction as the covering sheet 4a is stretched, but the closing plate made of a material having water permeability such as cloth or nonwoven fabric arranged in the permeable window has a stretchability. Since it does not have it, it will be torn, which causes a problem that a large gap is formed in the transparent window and a large amount of the landfill sand 5a flows out.
本考案はかかる課題を解決するためになされたものであ
って、埋立側の水位が上昇しても埋立護岸が崩れる心配
がないとともに、埋立土砂が流出することのない埋立護
岸用被覆シートを提供することを目的とする。The present invention has been made in order to solve such a problem, and provides a cover sheet for a landfill revetment that does not cause the landfill revetment to collapse even if the water level on the landfill side rises and prevents the landfill sand from flowing out. The purpose is to do.
［課題を解決するための手段］ 本考案は、非透水性ならびに延伸性を有するシート体に
より形成されて埋立護岸の埋立側の法面に敷設される埋
立護岸用被覆シートにおいて、前記シート体は埋立護岸
に敷設した際に海面の最高水位と最低水位との間に位置
する部分に透窓が設けられており、前記シート体の最大
延伸時における透窓の延伸方向長さよりも長く且つ透水
性を有する閉止板が前記透窓を覆って前記シート体に上
端縁を止着して付設されている構成を以て前記課題を解
決するための手段とした。[Means for Solving the Problem] The present invention provides a cover sheet for a landfill seawall, which is formed by a sheet body having water impermeability and stretchability and is laid on the slope of the landfill side of the landfill seawall, wherein the sheet body is When laid on a reclaimed seawall, a permeable window is provided in the part located between the highest water level and the lowest water level of the sea surface, and the permeable window is longer than the length in the stretching direction of the permeable window at the time of maximum stretching of the sheet body. The closing plate having the above is provided so as to cover the through window and is attached to the sheet body by fixing the upper end edge to the sheet body.
［作用］ 埋立護岸を通過して埋立側へ流入した海水は海側の水位
の低下に伴って透水性を有する閉止板で覆われた透窓を
介して海側へ流出し、海側と埋立側との水位差を解消す
る。[Operation] Seawater that has flowed through the reclaimed seawall to the landfill side flows out to the sea side through the transparent window covered with a water-permeable closing plate as the water level on the sea side decreases, and the sea side and landfill. The water level difference with the side is eliminated.
また、予め閉止板をシート体の最大延伸時における透窓
の延伸方向長さよりも長く形成したことで埋立土砂の重
量によりシート体が延伸しても閉止板は破損することな
くせず、透窓を覆って埋立土砂を流出させない。Further, since the closing plate is formed longer than the length in the extending direction of the permeable window at the time of maximum stretching of the sheet body, even if the sheet body is stretched due to the weight of the landfill sand, the closing plate will not be damaged and the permeable window Cover it to prevent the landfill from flowing out.
［実施例］ 次に本考案の実施例を図面を基いて説明する。[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings.
第１図乃至第３図は本考案の一実施例を示すもので、埋
立護岸用被覆シート１は長さ２〜10mm、幅１〜７ｍ、長
さ２〜20ｍ程度の例えばポリ塩化ビニルからなり非透水
性ならびに延伸性を有するシート体２の埋立護岸に敷設
した際に海面の最高水位(L.W.L)と最低水位(H.W.L)との
間に位置する部分に一辺20〜30cm程度の方形の透窓３が
複数個形成されている。また、シート体２の裏面に帆
布、不織布などの透水性を有するが、延伸性を有してい
ない材質により形成された閉止板４が取付けられてい
る。1 to 3 show an embodiment of the present invention, in which a cover sheet 1 for landfill protection is made of, for example, polyvinyl chloride having a length of 2 to 10 mm, a width of 1 to 7 m, and a length of 2 to 20 m. A rectangular transparent window with a side length of 20 to 30 cm at the part between the highest water level (LWL) and the lowest water level (HWL) of the sea surface when laid on a reclaimed seawall of sheet body 2 that is water impermeable and stretchable. A plurality of 3 are formed. Further, a closing plate 4 formed of a material having water permeability, such as canvas or non-woven fabric, but having no stretchability, is attached to the back surface of the sheet body 2.
閉止板４はシート体２が最も延伸したときの透窓３の延
伸方向長さよりも長い長方形に形成されており、上方な
らびに下方の端縁５，６が透窓３の上方ならびに下方の
端縁７，８に沿って縫着などの適宜の手段により下方に
弛みを有して止着されている。The closing plate 4 is formed in a rectangular shape longer than the length in the extending direction of the transparent window 3 when the sheet body 2 is stretched most, and the upper and lower edges 5 and 6 are the upper and lower edges of the transparent window 3. Along the lines 7 and 8, they are fastened with slack down by an appropriate means such as sewing.
このように構成された埋立護岸用被覆シート１は従来の
ものと同様に使用され、第１図に示すように例えばコン
クリートブロックからなる護岸壁９の埋立側に裏込礫層
10を設けて構築された埋立護岸11の天端面13から法面12
の全体および海底に亘ってそれらの全長を被覆するよう
に敷設すればよい。The cover sheet 1 for reclaimed seawall thus configured is used in the same manner as the conventional one, and as shown in FIG. 1, for example, a backfill gravel layer is provided on the reclaimed side of the revetment wall 9 made of a concrete block.
From the top surface 13 to the slope 12 of the reclaimed seawall 11 constructed with 10
It may be laid so as to cover their entire length and the entire seabed.
本考案の埋立護岸用被覆シート１を敷設すると、埋立護
岸11を通過し或いは越えて埋立側Ｂへ侵入した海水は海
側Ａの水位の低下に伴って透水性を有する閉止板４で覆
われた透窓３を介して海側Ａへ流出し水位差を解消する
ので埋立側Ｂの水圧により埋立護岸11が崩落することが
ない。When the cover sheet 1 for landfill revetment of the present invention is laid, the seawater that has passed through the landfill bank 11 or has entered the landfill side B is covered with the water-permeable closing plate 4 as the water level on the sea side A decreases. Since the water flows out to the sea side A through the transparent window 3 and the water level difference is eliminated, the landfill revetment 11 is not collapsed by the water pressure on the landfill side B.
また、埋立側Ｂへ埋立土砂が投入されるとその重量によ
り第３図に示すようにシート体２が延伸して透窓４が上
下方向へ拡開するが、閉止板４は弛みがあるため引張ら
れて破断するということがなく、広げられて破損せず、
透窓４を覆って隙間を生じないので埋立土砂が流出し、
更には、埋立護岸11が損傷することもない。Further, when the landfill soil is thrown into the landfill side B, the weight of the landfill material causes the sheet body 2 to stretch and the through window 4 to expand in the vertical direction as shown in FIG. 3, but the closing plate 4 has slack. It will not be pulled and broken, it will be expanded and not damaged,
Since the transparent window 4 is covered and no gap is created, landfill sand flows out,
Further, the landfill seawall 11 is not damaged.
尚、本実施例では閉止板４の上下端縁５，６を透窓３の
上下端縁７，８に沿って下方に弛みを有して止着されて
いる構成としたため、被覆シート１を埋立護岸11へ敷設
する際に閉止板４が捲れて透窓３を露出させるることが
ないが、閉止板４は広げた状態で上端縁５だけをシート
体２に止着する構成であってもよい。また、透孔４は方
形に形成されているが例えば円形、菱形など他の形状で
あってもよいことは勿論である。In this embodiment, since the upper and lower edges 5 and 6 of the closing plate 4 are fixed to the through window 3 along the upper and lower edges 7 and 8 with a downward slack, the cover sheet 1 is Although the closing plate 4 does not curl to expose the transparent window 3 when it is laid on the reclaimed seawall 11, the closing plate 4 is unfolded and only the upper edge 5 is fixed to the sheet body 2. Good. Further, although the through hole 4 is formed in a square shape, it is needless to say that the through hole 4 may have another shape such as a circle or a rhombus.
［考案の効果］ 本考案である埋立護岸用被覆シートは、潮の満干などに
よる海側と埋立側との水位差を解消し、護岸の崩落を防
止することができるばかりか、殊に埋立土砂が投入され
たときその重量によりシート体が延伸して透窓が上下方
向へ拡開しても閉止板で常に覆われるため土砂を流出さ
せることがない。また、構成も複雑でなく敷設作業の障
害となることもない。[Effects of the Invention] The cover sheet for landfill revetment of the present invention can not only prevent the collapse of the revetment by eliminating the water level difference between the sea side and the landfill side due to the ebb and flow of the tide, but especially the landfill sand. When the sheet is thrown in, the sheet body is stretched due to the weight of the sheet and even if the permeable window is expanded in the vertical direction, it is always covered with the closing plate, so that the sediment does not flow out. Moreover, the structure is not complicated and does not hinder the laying work.
第１図は本考案の一実施例を示す斜視部分図、第２図お
よび第３図は異なる状態における第１図のII−II線に沿
う拡大断面図、第４図は従来例を示す説明図である。 １……被覆シート、２……シート体、３……透窓、 ４……閉止板、。FIG. 1 is a perspective partial view showing an embodiment of the present invention, FIGS. 2 and 3 are enlarged sectional views taken along the line II-II of FIG. 1 in different states, and FIG. 4 is an explanation showing a conventional example. It is a figure. 1 ... Covering sheet, 2 ... Sheet body, 3 ... Through window, 4 ... Closure plate.
Claims (1)
(2)により形成されて埋立護岸の埋立側の法面に敷設さ
れる埋立護岸用被覆シートにおいて、前記シート体(2)
は埋立護岸に敷設した際に海面の最高水位と最低水位と
の間に位置する部分に透窓(3)が設けられており、前記
シート体(2)の最大延伸時における透窓(3)の延伸方向長
さよりも長く且つ透水性を有する閉止板(4)が前記透窓
(3)を覆って前記シート体(2)に上端縁を止着して付設さ
れていることを特徴とする埋立護岸用被覆シート。1. A sheet body having water impermeability and stretchability.
(2) In the cover sheet for landfill seawall formed by (2) and laid on the slope on the landfill side of the landfill seawall, the sheet body (2)
Is a transparent window (3) is provided in a portion located between the highest water level and the lowest water level of the sea surface when laid on a reclaimed seawall, and the transparent window (3) at the maximum extension of the sheet body (2). The closing plate (4) having a water permeability longer than the length of the permeable window
A cover sheet for a landfill seawall, which is attached to the sheet body (2) by covering the (3) and fixing the upper edge thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988138276U JPH0612029Y2 (en) | 1988-10-24 | 1988-10-24 | Cover sheet for reclaimed seawall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988138276U JPH0612029Y2 (en) | 1988-10-24 | 1988-10-24 | Cover sheet for reclaimed seawall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0258033U JPH0258033U (en) | 1990-04-26 |
| JPH0612029Y2 true JPH0612029Y2 (en) | 1994-03-30 |
Family
ID=31400466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988138276U Expired - Lifetime JPH0612029Y2 (en) | 1988-10-24 | 1988-10-24 | Cover sheet for reclaimed seawall |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0612029Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5946646B2 (en) * | 2012-01-27 | 2016-07-06 | 五洋建設株式会社 | Mound covering method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6140422U (en) * | 1984-08-10 | 1986-03-14 | 山水産業株式会社 | Covering sheet for embankment body |
| JPH067047Y2 (en) * | 1986-05-09 | 1994-02-23 | 山水産業株式会社 | Cover sheet for reclaimed seawall |
-
1988
- 1988-10-24 JP JP1988138276U patent/JPH0612029Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0258033U (en) | 1990-04-26 |
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