JPH0236726B2 - TOSUISEISHIITO - Google Patents
TOSUISEISHIITOInfo
- Publication number
- JPH0236726B2 JPH0236726B2 JP668882A JP668882A JPH0236726B2 JP H0236726 B2 JPH0236726 B2 JP H0236726B2 JP 668882 A JP668882 A JP 668882A JP 668882 A JP668882 A JP 668882A JP H0236726 B2 JPH0236726 B2 JP H0236726B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- independent
- permeable sheet
- sheet
- protrusions
- 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
- 239000000463 material Substances 0.000 description 18
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000002994 raw material Substances 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 239000004745 nonwoven fabric Substances 0.000 description 4
- -1 polypropylene Polymers 0.000 description 4
- 230000035699 permeability Effects 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 241000218645 Cedrus Species 0.000 description 1
- 235000009852 Cucurbita pepo Nutrition 0.000 description 1
- 241000219104 Cucurbitaceae Species 0.000 description 1
- 241000218691 Cupressaceae Species 0.000 description 1
- 244000061176 Nicotiana tabacum Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000012773 agricultural material Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/122—Flexible prefabricated covering elements, e.g. mats, strips
- E02B3/126—Flexible prefabricated covering elements, e.g. mats, strips mainly consisting of bituminous material or synthetic resins
Description
【発明の詳細な説明】
この発明は主に土木工事における排水材あるい
は土の補強材等に使用される透水性シートに関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water-permeable sheet mainly used as a drainage material or soil reinforcement material in civil engineering works.
土地の保全、基礎地盤の強化などの土木工事に
おいて排水は重要な要素の１つである。たとえ
ば、護岸や提防、擁壁等は背面から排水する必要
があるが、その排水と共に土砂が流失するのを防
ぐために吸出し防止工法が行なわれる。また、埋
立地等地耐力を増すために排水マツトを布設する
軟弱地盤安定工法が行なわれる。その他法面崩壊
防止、洗堀防止、トンネルの裏面排水、暗渠排水
などどれも排水によつて土地の保全と基礎地盤の
強化をはかる排水工法がある。 Drainage is one of the important elements in civil engineering works such as land conservation and foundation reinforcement. For example, it is necessary to drain water from the back of seawalls, bulwarks, retaining walls, etc., but in order to prevent earth and sand from being washed away with the drainage, anti-sucking construction methods are used. Additionally, in order to increase the bearing capacity of reclaimed land, etc., a method of stabilizing soft ground is carried out by laying drainage pine. There are other drainage methods such as slope collapse prevention, scouring prevention, backside drainage of tunnels, and culvert drainage, all of which use drainage to preserve land and strengthen the foundation.
従来、このような排水工法において種々の排水
材が用いられてきた。例えば、粗朶、砂、杉葉、
桧葉、木材、玉石等の天然資材は古くより用いら
れてきたものである。しかしながら、最近はこの
ような天然資材が故渇し、しかも資材運搬の経費
も高騰するようになつて天然資材に替るべき工場
生産された材料が用いられるようになつてきた。
工場生産された土木用の排水材としてはシート状
のものとして、例えば、ポリプロピレン繊維ある
いは塩化ビニリデン繊維等の合成繊維からなる不
織布のシート、あるいはプラスチツクのエンボス
シートと不織布との組合せよりなる積層シートな
どがある。 Conventionally, various drainage materials have been used in such drainage construction methods. For example, coarse wood, sand, cedar leaves,
Natural materials such as cypress leaves, wood, and cobblestone have been used since ancient times. However, in recent years, such natural materials have become depleted, and the cost of transporting materials has also increased, so factory-produced materials have come to be used instead of natural materials.
Factory-produced drainage materials for civil engineering are in sheet form, such as nonwoven sheets made of synthetic fibers such as polypropylene fibers or vinylidene chloride fibers, or laminated sheets made of a combination of embossed plastic sheets and nonwoven fabrics. There is.
ところで従来のシートは比較的柔軟で可撓性が
大きく、土砂とともに流失したり、陥没したりし
て用をなさなくなる等の恐れがあり、また比較的
透孔が小さく、目詰りを生ずる恐れのあるものが
みられる。 By the way, conventional sheets are relatively soft and flexible, and there is a risk that they will be washed away with earth and sand or collapse, rendering them useless.Also, the perforations are relatively small, and there is a risk of clogging. I can see something.
本発明は、これらの従来のシート状排水材に替
えてもしくは併せて使用されるべき適度の剛性と
可撓性を有するとともにより良い透水性をもつた
シート状材料を提供するものである。 The present invention provides a sheet-like material that has appropriate rigidity and flexibility, and has better water permeability, to be used instead of or in addition to these conventional sheet-like drainage materials.
即ち、本発明は表裏交互に窪んで形成される多
数の独立突起を有するシートであつて、このシー
トが多数の貫通孔を有している透水性シートであ
る。 That is, the present invention is a water-permeable sheet having a large number of independent protrusions formed in depressions alternately on the front and back sides, and this sheet has a large number of through holes.
以下図面により本発明を詳細に説明する。 The present invention will be explained in detail below with reference to the drawings.
第１図は本発明の透水性シート１の一例の一部
を示す斜視図であり、表裏交互に窪んで形成され
る多数の独立突起２を有している。独立突起２は
透水性シート１において表裏交互に窪み、窪むこ
とによつて反対側へは突起しているのであるが、
この窪み及び突起は必ずしも第１図に示すように
規則的である必要はなく不規則であつてもよい。
要は、一定の面積の中で実質的に表裏交互性を有
し透水性シート１に厚み方向の嵩高性を付与でき
ればよい。従つて、独立突起２が表裏のどちらか
に極端に片寄つて存在しないのがよい。又、多数
の独立突起２は、第１図のように互いにびつしり
と接近していてもよいし、間隔を置いて形成され
ていてもよい。更に、透水性シート１の表裏にバ
ランスのとれた剛性と可撓性を付与するには表裏
への窪みの深さ、即ち、独立突起２の高さは均一
に同じであるのが好ましい。 FIG. 1 is a perspective view showing a part of an example of a water-permeable sheet 1 of the present invention, which has a large number of independent protrusions 2 formed by depressions alternately on the front and back sides. The independent protrusions 2 are recessed alternately on the front and back sides of the water-permeable sheet 1, and by recessing, they protrude to the opposite side.
The depressions and protrusions do not necessarily have to be regular as shown in FIG. 1, but may be irregular.
In short, it is sufficient that the water-permeable sheet 1 can have substantially alternating front and back surfaces within a certain area and can be given bulkiness in the thickness direction. Therefore, it is preferable that the independent protrusions 2 are not extremely biased towards either the front or the back. Further, the large number of independent protrusions 2 may be formed closely adjacent to each other as shown in FIG. 1, or may be formed at intervals. Furthermore, in order to impart well-balanced rigidity and flexibility to the front and back sides of the water-permeable sheet 1, it is preferable that the depth of the depressions on the front and back sides, that is, the height of the independent protrusions 2, be uniformly the same.
一方、独立突起２の高さａと底部の最大寸法径
ｂとの比が２対１よりも小であるのが好ましい。
とりわけ１対１前後のどちらかと言えばズングリ
型の形状をした突起であることがより好ましい。
その理由は、後述する成形に際して独立突起２の
側部は他の部分に比して厚みが薄くなることと貫
通孔３が成形前に比して拡大されるため、独立突
起２が上下方向からの圧縮力に対して脆弱になる
からである。 On the other hand, it is preferable that the ratio between the height a of the independent protrusion 2 and the maximum diameter b of the bottom is smaller than 2:1.
In particular, it is more preferable that the protrusions be approximately one-to-one and have a rather zigzag-like shape.
The reason for this is that during molding, which will be described later, the side part of the independent protrusion 2 becomes thinner than other parts, and the through hole 3 is enlarged compared to before molding. This is because it becomes vulnerable to the compressive force of.
第２図は、第１図の透水性シート１の１部拡大
端面図であるが、前記の独立突起２の高さａは５
〜20mm、底部の径ｂは10〜30mm程度の寸法であ
る。またこの独立突起２は略截頭錐形でその上部
は実質的に平坦でありかつ高さは均一であるのが
この透水性シート１の使用に際して便利である。
例えば、他のシート状材料と積層して用いる際に
接着がし易いという利点がある。しかしながら、
前記寸法は用途によつて変更しうるものであり、
また独立突起２の形状はこれに拘わらず他の形状
であつてもよい。例えば、半円球の形状に窪んで
なる独立突起２は後述する成形に際して側部のみ
でなく全体に均一に引き延ばされる傾向にあるの
で、強度的に弱点が少くなるという利点がある。
その他独立突起２の上部が円形、正方形、長方
形、星形等であつてもよい。 FIG. 2 is a partially enlarged end view of the water-permeable sheet 1 shown in FIG. 1, and the height a of the independent projections 2 is 5.
~20mm, and the diameter b of the bottom is approximately 10~30mm. Furthermore, it is convenient for the use of the water-permeable sheet 1 that the independent protrusions 2 have a substantially truncated conical shape and have substantially flat upper portions and uniform heights.
For example, it has the advantage of being easy to bond when used in a laminated manner with other sheet-like materials. however,
The above dimensions can be changed depending on the application,
Moreover, the shape of the independent protrusion 2 may be other shapes regardless of this. For example, the independent protrusion 2 recessed in the shape of a semicircle tends to be uniformly stretched not only on the sides but also on the whole during molding, which will be described later, so there is an advantage that weak points in terms of strength are reduced.
In addition, the upper part of the independent protrusion 2 may be circular, square, rectangular, star-shaped, or the like.
個々の独立突起２は一面から見れば突び出てお
り他面から見ると窪んでいる。また、この独立突
起２は個々に独立しており、独立突起間には略水
平に連結している部分４を残すこともある。この
独立というのは波板のように突起が連続している
形状、換言すれば畦状ではないことを意味する。 Each independent protrusion 2 protrudes when viewed from one side and is depressed when viewed from the other side. Further, the independent protrusions 2 are each independent, and a portion 4 connected approximately horizontally may remain between the independent protrusions. This independence means that the protrusions are continuous like a corrugated sheet, in other words, it is not ridge-like.
貫通孔３は透水性シート１の表裏に貫通してお
り、独立突起２の上部、側部および底部にも存在
する。このように設けられた多数の貫通孔３によ
つて透水性シート１には表裏および前後左右すな
わち水平方向にいずれの方向へも透水性が付与さ
れる。 The through holes 3 pass through the front and back sides of the water-permeable sheet 1, and are also present at the top, side, and bottom of the independent projections 2. The large number of through-holes 3 provided in this manner impart water permeability to the water-permeable sheet 1 in all directions, front and back, front and back, right and left, that is, in the horizontal direction.
本発明に用いられるシートの素材としては、硬
質で熱成形可能なプラスチツクであればなんでも
よいが、例えば、硬質ポリ塩化ビニル、ポリスチ
レン、ポリエチレン（HDPE）、ポリプロピレン、
ポリカーボネート、ポリ塩化ビニリデン、ナイロ
ン、ポリエステルなどが使用される。具体的に
は、これらの素材のプラスチツクネツト、剛性の
ある不織布、多数の孔を穿けたプラスチツクシー
トが原材料シートとして用いられる。 The material of the sheet used in the present invention may be any hard, thermoformable plastic, such as hard polyvinyl chloride, polystyrene, polyethylene (HDPE), polypropylene,
Polycarbonate, polyvinylidene chloride, nylon, polyester, etc. are used. Specifically, plastic nets made of these materials, rigid nonwoven fabrics, and plastic sheets with a large number of holes are used as the raw material sheet.
その他冷延可能な金属板、例えば、鋼板、アル
ミニウム板に多数の孔を穿けたパンチドメタルあ
るいはメタルラスが使用できる。さらに金属線に
よる網も原材料シートとして用いることができ
る。 Other metal plates that can be cold-rolled, such as steel plates, punched metals with a large number of holes in an aluminum plate, or metal laths can be used. Furthermore, a mesh made of metal wires can also be used as the raw material sheet.
本発明の透水性シート１を製造する方法を以下
に説明する。第３図に示すような多数の貫通孔６
を有するプラスチツクのシート５をまずプラスチ
ツクの軟化点以上に加熱する。次に、鈍い先端、
例えば四角形あるいは丸形の先端を有する金属棒
の多数を長方形あるいは正方形に一定間かくをお
いて配列した２つの金属棒配列群の中間に前記の
加熱されたシート５を置く。 The method for manufacturing the water-permeable sheet 1 of the present invention will be explained below. A large number of through holes 6 as shown in FIG.
The sheet 5 of plastic having the following properties is first heated above the softening point of the plastic. Then the blunt tip,
For example, the heated sheet 5 is placed between two groups of metal rods in which a large number of metal rods having rectangular or round tips are arranged at regular intervals in a rectangular or square shape.
次に、この金属棒配列群を互い違いに咬み合わ
せることによつて第１図に示すような多数の独立
突起２を有しかつ多数の貫通孔３を有する透水性
シート１を得る。 Next, by interlocking these metal rod array groups in an alternating manner, a water permeable sheet 1 having a large number of independent protrusions 2 and a large number of through holes 3 as shown in FIG. 1 is obtained.
金属を素材とする原材料シートからも上記と同
様の方法で加工ができるが、この場合には加熱は
不用である。 A raw material sheet made of metal can also be processed in the same manner as above, but in this case heating is not necessary.
成形法から理解できるように、成形時に引き延
ばされるのは独立突起２の側部であり、底部や頂
部はあまり引き延ばされない。したがつて前記の
ように独立突起２の高さａと底部径ｂの最大寸法
との比があまり大きすぎると側部が切れたり極端
に弱くなる危険性がある。用いるシート５の厚み
や貫通孔６の大きさ、数にもよるが、前記の比は
２：１より小さいことが望ましいのはこのような
理由による。 As can be understood from the molding method, it is the side portions of the independent protrusions 2 that are stretched during molding, and the bottom and top portions are not stretched so much. Therefore, as described above, if the ratio between the height a of the independent protrusion 2 and the maximum dimension of the bottom diameter b is too large, there is a risk that the side portions may be cut or become extremely weak. Although it depends on the thickness of the sheet 5 used and the size and number of through holes 6, it is for this reason that the ratio is preferably smaller than 2:1.
第４図は第３図のシート５のＡ−Ａ断面図、第
５図は同じくＢ−Ｂ断面図である。このシート５
はネツトと呼ぶこともできるが、ネツト交叉部で
は肉厚になつており、これは第１図の本発明の成
形品に剛性を与えるのに役だつ。 FIG. 4 is a sectional view taken along the line AA of the sheet 5 shown in FIG. 3, and FIG. 5 is a sectional view taken along the line BB. This sheet 5
Although it can be called a net, it is thicker at the intersection of the net, which helps provide rigidity to the molded article of the present invention shown in FIG.
第６図は、理解を容易にするために第３図から
貫通孔５を省略したシートを前記の方法によつて
成形した形即ち、第１図から貫通孔３を省略した
姿を示すものであり、第７図はその断面を示し、
第８図はその成形前の原材料シートの斜視図であ
る。 FIG. 6 shows a sheet formed by the method described above, with the through holes 5 omitted from FIG. Yes, and Figure 7 shows its cross section.
FIG. 8 is a perspective view of the raw material sheet before forming.
本発明の透水性シートは上記のような表裏交互
に窪んで形成される多数の独立突起を有するので
片面だけの突起に較べて２倍の嵩高性を有する。
このことは、本発明の透水性シートに表裏にバラ
ンスのとれた適度の剛性と可撓性を付与し、かつ
略水平に連結している部分を残している場合には
伸びが小さくしかも前後左右及び上下に十分な透
水性を付与する。従つて、これを土木用の排水
材、即ちマツトとして有利に使用することができ
る。例えば、法面に敷設して客土をした場合に、
本発明の透水性シートの表面側の独立突起部が客
土の流れ出し防止の役を果し、また裏面側の独立
突起部が法面に喰込んでマツトのずれが防止され
る。更に独立突起の頂点を客土の厚さを測る基準
とすることができる。 Since the water-permeable sheet of the present invention has a large number of independent protrusions which are recessed alternately on the front and back sides as described above, it has twice the bulkiness as compared to protrusions on only one side.
This means that if the water-permeable sheet of the present invention is given appropriate rigidity and flexibility that are well-balanced on the front and back sides, and a portion that is connected approximately horizontally is left, the elongation will be small, and and provide sufficient water permeability to the top and bottom. Therefore, it can be advantageously used as a drainage material for civil engineering, that is, as a mat. For example, when laying soil on a slope,
The independent protrusions on the front side of the water-permeable sheet of the present invention serve to prevent soil from flowing out, and the independent protrusions on the back side bite into the slope to prevent the mat from shifting. Furthermore, the apex of the independent protrusion can be used as a reference for measuring the thickness of the soil.
本発明の透水性シートは単独で用いても良いが
使用場所、使用目的によつて他の透水性材料、例
えば、織布、編布、ネツトあるいは不織布と積層
あるいは組合せて用いることもできる。例えば、
本発明の透水性シートの表及び裏の両面に平坦な
プラスチツクネツトを補強材として配し、全体を
不織布のフイルターで包んだものが排水材として
使用される。この場合フイルター間に比較的空隙
の大きい排水路が構成されることになる。 The water-permeable sheet of the present invention may be used alone, but depending on the location and purpose of use, it may be laminated or used in combination with other water-permeable materials, such as woven fabrics, knitted fabrics, nets, or non-woven fabrics. for example,
The water-permeable sheet of the present invention is used as a drainage material by disposing flat plastic nets as reinforcing materials on both the front and back sides and wrapping the entire sheet with a non-woven filter. In this case, a drainage channel with a relatively large gap is formed between the filters.
また、本発明の透水性シートを盛土等の土中に
埋設することによつて土を補強することもでき
る。 Furthermore, the water-permeable sheet of the present invention can be buried in soil such as embankment to reinforce the soil.
本発明の透水性シートは、土地の保全、基礎地
盤の強化など土木工事における排水材として使用
できるとともに、たばこなどの採葉農作物、うり
などの採果農作物の周囲にスペーサーとして設置
して農作物が直接地面に接しないようにするよう
な農業資材としても応用が可能である。更に、平
坦なネツトと積層して乾燥用すの子（簀の子）、
押し入れ防湿マツトとして使用することもでき
る。その他、比較的厚手の不織布、織布と組合せ
てゴルフ場の芝の保温材、テニスコートの保温材
などむしろの代替品としても使用できる。 The water-permeable sheet of the present invention can be used as a drainage material in civil engineering works such as land conservation and foundation reinforcement, and can also be installed as a spacer around leaf crops such as tobacco and fruit crops such as gourds. It can also be used as an agricultural material that does not come into direct contact with the ground. In addition, there is a drying screen that is layered with a flat net for drying.
It can also be used as a moisture-proof mat. In addition, in combination with relatively thick non-woven fabrics or woven fabrics, it can be used as a heat insulator for golf course grass, a heat insulator for tennis courts, and other alternative products.
更に透水性人工芝生の裏面に積層することによ
り排水性能が付与された人工芝生を得ることがで
きる。 Furthermore, by laminating it on the back side of a water-permeable artificial lawn, an artificial lawn with drainage performance can be obtained.
第１図は、本発明の透水性シートの一部を示す
斜視図であり、第２図はその一部拡大端面図であ
る。第３図は本発明の透水性シートを成形するた
めの原料シートであり、第４図、第５図はそれぞ
れＡ−Ａ及びＢ−Ｂ断面図である。第６図は、第
１図から貫通孔を省略した図であり、第７図はそ
の断面図であり、第８図はその成形前の原料シー
トの斜視図である。
１……透水性シート、２……独立突起、３……
貫通孔。
FIG. 1 is a perspective view showing a part of the water-permeable sheet of the present invention, and FIG. 2 is a partially enlarged end view thereof. FIG. 3 shows a raw material sheet for forming the water-permeable sheet of the present invention, and FIGS. 4 and 5 are sectional views taken along line A-A and line B-B, respectively. 6 is a diagram with the through holes omitted from FIG. 1, FIG. 7 is a sectional view thereof, and FIG. 8 is a perspective view of the raw material sheet before forming. 1...Water permeable sheet, 2...Independent protrusion, 3...
Through hole.
Claims (1)
を有するシートであつて、このシートの独立突起
部に多数の貫通孔を有していることを特徴とする
透水性シート。 ２ 独立突起の高さと底部の最大寸法との比が
２：１よりも小である特許請求の範囲第１項記載
の透水性シート。 ３ 独立突起の上部が平坦である特許請求の範囲
第１項記載の透水性シート。 ４ 独立突起が截頭錐形または半円球の形状であ
る特許請求の範囲第１項記載の透水性シート。 ５ 多数の独立突起の高さが表裏均一である特許
請求の範囲第１項記載の透水性シート。 ６ 貫通孔が独立突起の上部、側部および底部に
存する特許請求の範囲第１項記載の透水性シー
ト。[Scope of Claims] 1. A water-permeable sheet having a large number of independent protrusions formed by alternating depressions on the front and back sides, the sheet having a large number of through holes in the independent protrusions. . 2. The water-permeable sheet according to claim 1, wherein the ratio between the height of the independent protrusions and the maximum dimension of the bottom portion is smaller than 2:1. 3. The water-permeable sheet according to claim 1, wherein the independent protrusions have flat upper portions. 4. The water-permeable sheet according to claim 1, wherein the independent projections have a truncated pyramid shape or a semicircular shape. 5. The water-permeable sheet according to claim 1, wherein the height of the large number of independent protrusions is uniform on both sides. 6. The water-permeable sheet according to claim 1, wherein the through holes are present at the top, side, and bottom of the independent protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP668882A JPH0236726B2 (en) | 1982-01-18 | 1982-01-18 | TOSUISEISHIITO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP668882A JPH0236726B2 (en) | 1982-01-18 | 1982-01-18 | TOSUISEISHIITO |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58123914A JPS58123914A (en) | 1983-07-23 |
| JPH0236726B2 true JPH0236726B2 (en) | 1990-08-20 |
Family
ID=11645289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP668882A Expired - Lifetime JPH0236726B2 (en) | 1982-01-18 | 1982-01-18 | TOSUISEISHIITO |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0236726B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4749306A (en) * | 1986-09-05 | 1988-06-07 | Leucadia, Inc. | Formed corrugated plastic net for drainage applications |
| AU6853587A (en) * | 1986-09-05 | 1988-03-10 | Leucadia, Inc. | Plastic matting for erosion control and revegetation |
| CN103397614A (en) * | 2013-07-02 | 2013-11-20 | 沈阳农业大学 | Stone cage check dam used for mountainous area erosion gully control |
| CN107558451B (en) * | 2017-09-26 | 2019-08-20 | 界首市英琪养殖专业合作社 | A kind of drainage waterlogging prevention device based on sesame plantation |
-
1982
- 1982-01-18 JP JP668882A patent/JPH0236726B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58123914A (en) | 1983-07-23 |
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