JPH09273152A - Surface material for fill and earth structure - Google Patents
Surface material for fill and earth structureInfo
- Publication number
- JPH09273152A JPH09273152A JP10862896A JP10862896A JPH09273152A JP H09273152 A JPH09273152 A JP H09273152A JP 10862896 A JP10862896 A JP 10862896A JP 10862896 A JP10862896 A JP 10862896A JP H09273152 A JPH09273152 A JP H09273152A
- Authority
- JP
- Japan
- Prior art keywords
- geosynthetic
- bag
- shaped
- surface material
- embankment
- 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.)
- Withdrawn
Links
Landscapes
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は盛土や擁壁等の土構
造物を構築するための、施工性に優れ、排水性に優れた
盛土表面材及び土構造物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embankment surface material and an earth structure for constructing earth structures such as embankments and retaining walls, which are excellent in workability and drainage.
【０００２】[0002]
【従来の技術】盛土や擁壁等の土構造物の構築方法とし
ては、従来、次の如き方法が知られている。 （Ａ）ジオテキスタイルを敷設し、ジオテキスタイルの
端部に土砂を入れた土嚢を置きこの上に土砂をまき出
し、転圧するとともに前記ジオテキスタイルの自由端側
の端を折り曲げ、土嚢を包み込むことにより盛土表面を
形成し、土層を形成し、この工程をくり返しながら土層
を積み重ねて土構造物を構築する方法。2. Description of the Related Art The following methods are conventionally known as methods for constructing earth structures such as embankments and retaining walls. (A) Laying a geotextile, placing a sandbag containing sand at the end of the geotextile, spreading the sand on top of this, rolling the compaction, bending the free-end side end of the geotextile, and wrapping the sandbag to wrap the embankment surface Forming, forming a soil layer, and repeating this process to build up a soil structure by stacking soil layers.
【０００３】（Ｂ）上記方法を改善した方法として特公
平３ー２１６８６号公報には、盛土の先端部に、発泡合
成樹脂製ブロックを保持したジオテキスタイルを地盤上
に敷設し、土層を積み重ねた土構造物の構築方法が開示
されている。 （Ｃ）さらに排水面を改良した方法として特開平７ー２
５２８４１号公報には、盛土の先端部に、発泡合成樹脂
ブロックと透水性発泡合成樹脂製の排水層からなる擁壁
ブロックを備えた盛土を積み重ねた補強土構造物が開示
されている。(B) As a method of improving the above method, Japanese Patent Publication No. 3-21686 discloses that a geotextile having a foam synthetic resin block is laid on the ground at the tip of the embankment and the soil layers are stacked. A method of constructing a soil structure is disclosed. (C) As a method of further improving the drainage surface, JP-A-7-2
Japanese Patent No. 52841 discloses a reinforced soil structure in which an embankment is stacked at a tip portion of the embankment, the retaining wall block including a foam synthetic resin block and a water-permeable foam synthetic resin drainage layer.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、土砂を
入れた土嚢を作りこれを設置する（Ａ）の方法は、小型
の土嚢を多数作る手間及び作った多数の重い土嚢を運搬
し、正しく盛土することや擁壁表面に敷設することに多
くの時間と労力を必要とし、非常に施工性が悪いという
問題があった。However, in the method (A) of making a sandbag containing sand and installing it, it takes time and labor to make a large number of small sandbags and transports a large number of heavy sandbags to properly fill the soil. It took a lot of time and effort to lay it on the surface of the retaining wall, and there was a problem that the workability was very poor.
【０００５】また、（Ｂ）の方法では発泡合成樹脂ブロ
ックは透水性がないので、その背後に雨水などの地下水
が溜まると、水圧や浮力により擁壁が不安定になった
り、ブロックは一定の形状を有するので、設置する地面
の凹凸に追随し難く地面との間に大きな隙間が空いた
り、また実際の施工時に左右上下の連結部の隙間を埋め
ることが困難な場合が多々ある。しかもブロック状発泡
合成樹脂は製造コストが高いため通常発泡粒子より高価
であるという問題があった。さらに、（Ｃ）の方法にお
いては、発泡合成樹脂ブロックの側面および底面に発泡
スチロールビーズよりなる排水層を設置した構造となっ
ているが、ビーズ層は動き易く、また、発泡ビーズは風
で飛び易く施工し難いという問題があつた。本発明は上
記した種々の問題点を解決するものである。Further, in the method (B), since the foamed synthetic resin block has no water permeability, if groundwater such as rainwater accumulates behind it, the retaining wall becomes unstable due to water pressure or buoyancy, and the block is fixed. Since it has a shape, it is often difficult to follow the unevenness of the ground to be installed, so that there is a large gap between the ground and the ground, and in many cases it is difficult to fill the gap between the left, right, upper, and lower connecting portions during actual construction. Moreover, the block-shaped foamed synthetic resin has a problem that it is more expensive than the foamed particles because of its high manufacturing cost. Further, in the method (C), a drainage layer made of expanded polystyrene beads is installed on the side surface and the bottom surface of the expanded synthetic resin block, but the bead layer is easy to move and the expanded beads are easily blown by the wind. There was a problem that it was difficult to construct. The present invention solves the above-mentioned various problems.
【０００６】[0006]
【問題を解決するための手段】本発明は、発泡粒子を充
填したジオシンセティック袋を端部に連結した帯状のジ
オシンセティックからなる補強盛土表面材、に係わるも
のである。更に、本発明における補強盛土表面材は、発
泡粒子がポリスチレン系発泡粒子であるもの、また、発
泡粒子が充填された状態での５％圧縮強度が０．０５〜
３．０ｋｇｆ／ｃｍ2 の発泡粒子であるもの、更には、
発泡粒子がほぼＳ字状の断面を持つ発泡粒子である補強
盛土表面材、に係わるものである。DISCLOSURE OF THE INVENTION The present invention relates to a reinforced embankment surface material composed of a band-shaped geosynthetic in which a geosynthetic bag filled with foamed particles is connected at its ends. Further, in the reinforced embankment surface material of the present invention, the expanded particles are polystyrene-based expanded particles, and the 5% compressive strength in a state in which the expanded particles are filled is 0.05 to.
What is 3.0 kgf / cm 2 expanded particles, and further,
The present invention relates to a reinforced embankment surface material in which foamed particles are foamed particles having a substantially S-shaped cross section.
【０００７】また本発明は、発泡粒子を充填したジオシ
ンセティックの袋を端部に連結した帯状のジオシンセテ
ィックからなる補強盛土表面材が敷設された土層を積み
重ねて形成した土構造物、に係わるものである。本発明
を図面を用いて説明する。図１は、本発明における補強
盛土表面材の一例の一部断面斜視図を示す。符号１は帯
状ジオシンセティック、２はジオシンセティック製発泡
粒子袋、３は発泡粒子を示す。また、図２は本発明の図
１に示す補強盛土表面材を用いた土構造物の例を示す。
４はジオグリッド、５は転圧された土、６は地盤を示
す。Further, the present invention relates to a soil structure formed by stacking soil layers on which a reinforced embankment surface material made of a band-shaped geosynthetic, in which a geosynthetic bag filled with foamed particles is connected at the ends, is laid. It is a thing. The present invention will be described with reference to the drawings. FIG. 1 shows a partial cross-sectional perspective view of an example of a reinforced embankment surface material according to the present invention. Reference numeral 1 is a band-shaped geosynthetic, 2 is a foam bag made of geosynthetic foam particles, and 3 is a foam particle. 2 shows an example of a soil structure using the reinforced embankment surface material shown in FIG. 1 of the present invention.
4 is a geogrid, 5 is the compacted soil, and 6 is the ground.
【０００８】本発明の補強盛土表面材で補強された土構
造物においては、以下に述べる作用により、優れた施工
性、土形状保形性、補強性、および排水性が達成され
る。 （１）帯状ジオシンセティックの端部に発泡粒子を充填
したジオシンセティック製の袋が連結されており、この
袋の保形作用により土構造物の法面または壁面側の形状
が正確に保たれる。 （２）発泡粒子を充填したジオシンセティック製の袋は
可撓性を有し、かつ圧縮性があり、しかもジオシンセテ
ィックで包まれているため、圧縮に対し柔軟に変形し、
集中応力が作用せず、破壊し難く、かつ一体化された土
構造物が構築される。In the soil structure reinforced by the reinforced embankment surface material of the present invention, excellent workability, soil shape retention, reinforcement and drainage are achieved by the following actions. (1) A geosynthetic bag filled with expanded particles is connected to the end of the band-shaped geosynthetic, and the shape-retaining action of this bag maintains the shape of the slope or wall of the earth structure accurately. . (2) The geosynthetic bag filled with the foamed particles has flexibility and is compressible, and since it is wrapped with geosynthetic, it deforms flexibly when compressed,
An integrated earth structure is constructed that does not act on concentrated stress, is not easily destroyed, and is integrated.
【０００９】（３）端部に発泡粒子を充填したジオシン
セティックの袋を連結した帯状のジオシンセティックは
端部の袋を盛土および擁壁表面にしっかりと保持すると
ともに、敷設されている土の補強材となり、盛土および
擁壁を崩壊し難くする。 （４）発泡粒子を充填したジオシンセティックの袋は袋
の中で発泡粒子が適度に移動するので、地盤に設置後、
地盤に合わせて変形するため、凹凸のある地盤になじみ
隙間無く敷設できる。(3) A band-shaped geosynthetic in which a geosynthetic bag filled with foamed particles is connected to the end of the band, the end bag is firmly held on the embankment and the retaining wall surface, and the laid soil is reinforced. It becomes a material and makes it difficult for the embankment and retaining wall to collapse. (4) In a geosynthetic bag filled with foamed particles, the foamed particles move appropriately inside the bag, so after installation on the ground,
Since it deforms according to the ground, it can be laid without any gaps as it fits into uneven ground.
【００１０】（５）袋内に充填された発泡粒子間には空
隙が形成され、袋の材料であるジオシィンセティックに
は透水性があるので、全体として補強材が透水性を持っ
ている。従って、本発明の補強盛土盛土表面材で補強さ
れた土構造物においては、雨水等の地下水が土中に溜ま
っても排水され、補強構造が不安定にならない。また、
発泡粒子は袋詰めされているので、施工時に発泡粒子が
風で飛んだり、埋設時に発泡粒子が流動したりすること
はない。(5) Since voids are formed between the foam particles filled in the bag, and the geosynthetic material of the bag has water permeability, the reinforcing material as a whole has water permeability. . Therefore, in the earth structure reinforced by the reinforced embankment embankment surface material of the present invention, even if groundwater such as rainwater accumulates in the soil, it is drained and the reinforcement structure does not become unstable. Also,
Since the foamed particles are packed in a bag, the foamed particles do not fly by the wind at the time of construction and the foamed particles do not flow at the time of burying.
【００１１】（６）発泡粒子はバラ状のまま袋に充填さ
れるので、発泡粒子をブロック状に加熱成形する工程が
なく、コストは低減できる。前述の先行技術文献である
特公平３−２１６８６号公報では合成樹脂製のネット、
グリッド、不織布、織布、シートあるいはこれらの複合
材料をジオテキスタイルと称しているが、本発明のジオ
シンセティックとは、該ジオテキスタイル、及び人工芝
を含めた土木などの用途に用いられる繊維材料・高分子
材料の総称であり、その内特に透水性の材料が好まし
い。袋材および連結する帯状ジオシンセティックは同一
であっても異なった種類であっても良い。袋材としては
適度な強度があり、発泡粒子を洩らさず充填できるもの
が好ましい。(6) Since the expanded particles are filled in the bag in a loose shape, there is no step of heat-molding the expanded particles into a block shape, and the cost can be reduced. In Japanese Patent Publication No. 3-21686, which is the above-mentioned prior art document, a net made of synthetic resin,
A grid, a non-woven fabric, a woven fabric, a sheet or a composite material thereof is referred to as a geotextile, and the geosynthetic of the present invention is a fiber material / polymer used for applications such as the geotextile and civil engineering including artificial turf. It is a general term for materials, and among them, water-permeable materials are particularly preferable. The bag material and the band-shaped geosynthetics to be connected may be the same type or different types. It is preferable that the bag material has suitable strength and can be filled with the foamed particles without leaking.
【００１２】袋体の形状は、円又は楕円状の断面を持つ
筒状の物が作りやすく好ましいが、矩形や台形状でも問
題ない。大きさは特に限定するものではないが、作業性
と経済性から長さは３０cm〜１０ｍ、幅３０ｃｍ〜２
ｍ、高さ２０ｃｍ〜１ｍの範囲のものが作りやすくかつ
施工性もよく、経済的である。連結する帯状のジオシン
セティックは土構造物の中に埋め込まれ、端部の発泡粒
子を充填したジオシンセティックの袋を盛土および擁壁
の表面にしっかりと固定する必要から適度な強度を有
し、土との摩擦抵抗が大きいものを使用し、ネット、グ
リッド、不織布、織布、シート及びこれらの複合材等を
用いることができる。As for the shape of the bag, it is preferable to make a tubular product having a circular or elliptical cross section, but it is possible to use a rectangular or trapezoidal shape. The size is not particularly limited, but the length is 30 cm to 10 m and the width is 30 cm to 2 for workability and economy.
m, height of 20 cm to 1 m is easy to make, has good workability, and is economical. The band-shaped geosynthetic to be connected is embedded in the earth structure and has a moderate strength because it is necessary to firmly fix the geosynthetic bag filled with the foam particles at the end to the surface of the embankment and the retaining wall. It is possible to use a material having a large frictional resistance with respect to a net, a grid, a non-woven fabric, a woven fabric, a sheet, a composite material thereof, or the like.
【００１３】発泡粒子としては、ポリスチレン系発泡粒
子、ポリエチレン発泡粒子、ポリプロピレン発泡粒子、
塩化ビニル発泡粒子、塩化ビニリデン発泡粒子等の合成
樹脂発泡粒子が挙げられ、土の中での耐腐食性、軽量性
の点から、これらの合成樹脂製発泡粒子が適している。
特に、圧縮強度、物理的性質、経済性の面からポリスチ
レン系発泡粒子が適している。発泡粒子の形状は球形で
も非球形でも良く、図９に示すような種々の形状が挙げ
られる。球形とは異なった形、例えば眼鏡型、星形、ポ
テトチップ型、ボーン型、Ｓ字型、Ｌ字型、Ｙ字型等が
袋体内での発泡粒子の移動が適度に制限されるため、袋
体の変形が適度に制限され施工性がよいので好ましい。
特にＳ字型のようなフック形状を持つものが更に好まし
い。The expanded particles include polystyrene expanded particles, polyethylene expanded particles, polypropylene expanded particles,
Examples thereof include synthetic resin foamed particles such as vinyl chloride foamed particles and vinylidene chloride foamed particles. From the viewpoints of corrosion resistance in soil and lightness, these synthetic resin foamed particles are suitable.
In particular, polystyrene-based expanded particles are suitable in terms of compressive strength, physical properties, and economy. The shape of the foamed particles may be spherical or non-spherical, and various shapes as shown in FIG. 9 may be mentioned. Since a shape different from a spherical shape, such as a spectacle shape, a star shape, a potato chip shape, a bone shape, an S shape, an L shape, a Y shape, etc., is appropriately restricted in the movement of the foamed particles in the bag, Deformation of the bag is appropriately limited and workability is good, which is preferable.
Particularly, those having a hook shape such as S-shape are more preferable.
【００１４】発泡粒子の大きさは特に規定されないが最
大径が３ｍｍ〜２００ｍｍの範囲のものが好ましく、更
に好ましくは７ｍｍ〜１００ｍｍの範囲である。図９に
最大径（Ｌ）の測定例を示す。発泡粒子は、充填された
状態での５％圧縮強度が０．０５〜３．０ｋｇｆ／ｃｍ
2 の発泡粒子である。０．０５ｋｇｆ／ｃｍ2 より弱い
場合は施工時に変形し、盛土表面材として役に立たな
い。また、３．０ｋｇｆ／ｃｍ2 を越える場合は施工時
の地盤とのなじみが低下する。圧縮強度の測定はＪＩＳ
Ｚ−０２３４に準ずる。The size of the expanded beads is not particularly limited, but the maximum diameter is preferably in the range of 3 mm to 200 mm, more preferably 7 mm to 100 mm. FIG. 9 shows an example of measuring the maximum diameter (L). The expanded particles have a 5% compressive strength of 0.05 to 3.0 kgf / cm in a filled state.
2 are expanded particles. If it is less than 0.05 kgf / cm 2 , it will be deformed during construction and will not be useful as a surface material for embankment. If it exceeds 3.0 kgf / cm 2 , the compatibility with the ground during construction will be reduced. Measurement of compressive strength is based on JIS
According to Z-0234.
【００１５】また、袋体に連結する帯状のジオシンセテ
ィックは図１、図５に示す様に１枚でも、図３に示す様
に複数枚でもよい。ジオシンセティックの袋を盛土およ
び擁壁の表面にしつかりと固定する必要から帯状のジオ
シンセティックの長さ（ｄ）は３０cm以上好ましくは５
０cm以上必要である。また、更に長くして土構造物の補
強材の機能を合わせ持たせることもできる。帯状のジオ
シンセティックを他の帯状補強材と縫製、連結金具など
で連結することができ、又は単純に一部を重ね合わして
摩擦抵抗により接合することもできる。発泡粒子を充填
したジオシンセティック袋と帯状のジオシンセティック
との連結方法は、通常ミシンによる縫製、接着剤、接着
テープやマジックテープによる接着、鳩目などの金具を
介した連結などが用いられるが、図７、図８における様
に発泡粒子を充填したジオシンセティック袋を帯状のジ
オシンセティックにて巻く方法も連結方法として用いる
ことができる。Further, the band-shaped geosynthetic connected to the bag may be a single piece as shown in FIGS. 1 and 5 or a plurality of pieces as shown in FIG. The length (d) of the band-shaped geosynthetic is 30 cm or more, preferably 5 because it is necessary to fix the geosynthetic bag firmly on the surface of the embankment and the retaining wall.
0 cm or more is required. Further, it can be made longer to have the function of a reinforcing material for the earth structure. The strip-shaped geosynthetic can be connected to another strip-shaped reinforcing member by sewing, a connecting metal fitting, or the like, or they can be simply overlapped and joined by friction resistance. As a method of connecting the geosynthetic bag filled with foamed particles and the band-shaped geosynthetic, sewing with a sewing machine, adhesion with an adhesive, adhesive tape or Velcro, connection with metal fittings such as eyelets, etc. are usually used. A method of winding a geosynthetic bag filled with foamed particles with a band-shaped geosynthetic as shown in FIGS. 7 and 8 can also be used as a connecting method.
【００１６】[0016]
（実施例１）図１はこの発明に係わる盛土表面材の一実
施例を示す。袋の材質はスパンボンド不織布（旭化成工
業製「ポシブルＡＫー２００」；商品名）であり、内部
にＳ字形状の３０倍（３０倍とは３０ｃｃ／ｇをい
う。）発泡ポリスチレン粒子（旭化成工業製「アスパッ
クサラサラ」；商品名）を充填した大きさが長さ（ｃ）
３ｍ、幅（ａ）５０ｃｍ、高さ（ｂ）３０ｃｍの袋体の
端部に長さ（ｄ）１ｍの袋体と同一の帯状のスパンボン
ド不織布を縫製にて連結したものである。（ａ），
（ｂ），（ｃ）は袋体の奥行き（幅）、縦（高さ）、横
（長さ）の寸法を示し、以下各図において同様に用い
る。本実施例に用いた発泡粒子は最大径が３２ｍｍであ
り、発泡粒子の５％圧縮強度は０．１５ｋｇｆ／ｃｍ2
である。(Embodiment 1) FIG. 1 shows an embodiment of an embankment surface material according to the present invention. The material of the bag is spunbonded non-woven fabric (“Posible AK-200” manufactured by Asahi Kasei Kogyo; trade name), and has 30 times the S-shaped inside (30 times means 30 cc / g.) Expanded polystyrene particles (Asahi Kasei Corporation). Made by "Aspac Sara Sara"; product name) filled in length (c)
The same band-shaped spunbonded non-woven fabric as the bag having a length (d) of 1 m was connected to the end of the bag having a length of 3 m, a width (a) of 50 cm, and a height (b) of 30 cm by sewing. (A),
(B) and (c) show the depth (width), length (height), and width (length) dimensions of the bag body, which will be used in the same manner in the respective drawings. The expanded particles used in this example have a maximum diameter of 32 mm, and the expanded particles have a 5% compressive strength of 0.15 kgf / cm 2.
It is.
【００１７】図２は、図１を用いて造られた本発明にお
ける盛土構造物の実施例を示す。図１の盛土表面材を盛
土先端部に発泡粒子袋がくる様に地盤上６に敷設し、帯
状のスパンボンド１を盛土内部に向かって地盤の上に延
ばし、その上に盛土補強用のジオグリッド（旭化成工業
製「パワーグリッドＰ９０００」；商品名））４を敷設
し、その上に土５をまき出し、折り曲げたジオグリッド
の端部をまき出した土の中に埋め３０ｃｍの厚さに土を
転圧し第１層を形成する。次に転圧した第１層の上に、
更に第１層の形成時と同様に、図１の盛土表面材を敷設
し、帯状のスパンボンドを第１層の上に延ばした後、そ
の上に盛土補強用のジオグリッドを敷設し、その上に土
をまき出し、折り曲げたジオグリッドの端部をまき出し
た土の中に埋め、３０ｃｍの厚さに転圧後、第２層を形
成する。この操作を繰り返し、勾配５分、３０層、高さ
９ｍの盛土を構築した。FIG. 2 shows an embodiment of the embankment structure according to the present invention produced by using FIG. The embankment surface material of Fig. 1 is laid on the ground 6 so that the foamed particle bag comes to the tip of the embankment, and the strip-shaped spunbond 1 is extended toward the inside of the embankment on the ground, and the geological material for embankment reinforcement is placed on it. A grid (“Power Grid P9000” manufactured by Asahi Kasei Co., Ltd .; trade name) 4 is laid, and soil 5 is laid on top of it, and the end of the bent geogrid is buried in the soil laid out to a thickness of 30 cm. The soil is compacted to form the first layer. Next, on the first layer that was compacted,
Further, as in the case of forming the first layer, the embankment surface material of FIG. 1 is laid, the band-shaped spunbond is extended onto the first layer, and then a geogrid for embankment reinforcement is laid on the first layer. Soil is sprinkled on the top, the end of the bent geogrid is buried in the spoiled soil, and after rolling to a thickness of 30 cm, the second layer is formed. This operation was repeated to construct an embankment with a gradient of 5 minutes, 30 layers and a height of 9 m.
【００１８】（実施例２）図３はこの発明に係わる盛土
表面材の一実施例を示す。袋２の材質はポリエステルの
織布（旭化成工業製「パブリックシート＃２００」；商
品名）であり、内部にＳ字形状の２５倍発泡ポリスチレ
ン粒子（旭化成工業製「アスパックサラサラ」；商品
名）３を充填した大きさが長さ（ｃ）２ｍ、幅（ａ）４
０ｃｍ、高さ（ｄ）２５ｃｍの袋体の端部に１ｍと５ｍ
の２枚の帯状の高強力ポリエステル糸で補強したスパン
ボンド不織布（旭化成工業製「ポシブルＡＣー３０
０」；商品名）１を縫製にて袋に連結したものである。
発泡粒子は最大径が３０ｍｍであり、発泡粒子の５％圧
縮強度は０．１７ｋｇｆ／ｃｍ2 である。(Embodiment 2) FIG. 3 shows an embodiment of the embankment surface material according to the present invention. The material of the bag 2 is a polyester woven fabric (“Public Sheet # 200” manufactured by Asahi Kasei Kogyo; trade name), and S-shaped 25-fold expanded polystyrene particles (“Aspac Sara Sara” manufactured by Asahi Kasei Kogyo; trade name) 3 The size filled with is length (c) 2m, width (a) 4
1 cm and 5 m at the end of the bag with 0 cm and height (d) 25 cm
Spunbonded non-woven fabric reinforced with two belt-shaped high-strength polyester yarns (“Possible AC-30” manufactured by Asahi Kasei Corporation)
0 "; product name) 1 is connected to the bag by sewing.
The expanded particles have a maximum diameter of 30 mm, and the expanded particles have a 5% compressive strength of 0.17 kgf / cm 2 .
【００１９】図４は、図３の補強盛土表面材を用いて造
られた本発明における盛土構造物の実施例を示す。図３
の盛土表面材を盛土先端部に発泡粒子袋２がくるように
地盤上６に敷設し、５ｍの帯状の補強スパンボンド１を
盛土内部に向かい地盤の上に延ばし、その上に土５をま
きだし、２５ｃｍの厚さに転圧後、転厚した土５の上に
１ｍの帯状の補強スパンボンド１を敷設し、第１層を形
成する。次いで、第１層の上に図３の盛土表面材を盛土
先端部に発泡粒子袋２がくるように敷設し、５ｍの帯状
の補強スパンボンド１を盛土内部に向かい地盤の上に延
ばし、その上に土５をまきだし、２５ｃｍの厚さに転圧
後、１ｍ帯状の補強スパンボンド１の上に延ばし、その
上に土５をまきだし、２５ｃｍの厚さに転圧し、第２層
を形成した。この操作を繰り返し、２０層、高さ５ｍの
擁壁を構築した。FIG. 4 shows an embodiment of the embankment structure according to the present invention made by using the reinforced embankment surface material of FIG. FIG.
The embankment surface material is laid on the ground 6 so that the foamed particle bag 2 is located at the tip of the embankment, and a 5 m strip-shaped reinforced spunbond 1 is extended toward the inside of the embankment and spread on the ground, and the soil 5 is spread on it. However, after rolling to a thickness of 25 cm, a 1 m strip-shaped reinforcing spunbond 1 is laid on the rolled soil 5 to form a first layer. Next, the embankment surface material of FIG. 3 is laid on the first layer so that the foamed particle bag 2 is located at the tip of the embankment, and a 5 m strip-shaped reinforcing spunbond 1 is extended toward the inside of the embankment and extends onto the ground. Soil 5 is spread on the top, and after rolling to a thickness of 25 cm, it is spread over the 1 m strip-shaped reinforcing spunbond 1, and soil 5 is spread on it, and it is rolled to a thickness of 25 cm, and the second layer is applied. Formed. By repeating this operation, a retaining wall having 20 layers and a height of 5 m was constructed.
【００２０】（実施例３）図５は本発明における盛土表
面材の一実施例を示す。袋の材質は不織布であり、内部
に平均直径６ｍｍの球状の発泡ポリスチレン５０倍発泡
粒子３を充填した大きさが長さ（ｃ）３ｍ、幅（ａ）７
０ｃｍ、高さ（ｂ）５０ｃｍの袋体２の端部に２ｍのス
パンボンド不織布をマジックテープにて連結したもので
ある。図６は、図５の盛土表面材を用いて造られた本発
明における盛土構造物の実施例を示す。図５の盛土表面
材を地盤上６に置き、２ｍの帯状のスパンボンド１を地
盤６の上に延ばした後、その上に土をまきだし、５０ｃ
ｍの厚さに転圧し第１層を形成する。次に、第１層の上
に、更に、図５の盛土表面材を第１層形成時と同様に敷
設後、帯状の不織布１を延ばしその上に土をまき出し転
圧し、第２層を形成する。この操作を繰り返し、勾配１
割２分、８層、高さ４ｍの盛土を構築した。(Embodiment 3) FIG. 5 shows an embodiment of the embankment surface material according to the present invention. The material of the bag is a non-woven fabric, and the size in which spherical expanded polystyrene 50 times expanded particles 3 having an average diameter of 6 mm are filled inside has a length (c) of 3 m and a width (a) of 7.
A bag 2 having a height of 0 cm and a height (b) of 50 cm is connected to a spunbonded non-woven fabric of 2 m with a velcro tape. FIG. 6 shows an embodiment of the embankment structure according to the present invention made by using the embankment surface material of FIG. The embankment surface material of FIG. 5 is placed on the ground 6, a 2 m strip-shaped spunbond 1 is extended on the ground 6, and then soil is spread on the ground 50 c.
The first layer is formed by rolling to a thickness of m. Next, after further laying the embankment surface material of FIG. 5 on the first layer in the same manner as when forming the first layer, the strip-shaped nonwoven fabric 1 is extended, and the soil is sprinkled and rolled onto the second layer to form the second layer. Form. Repeat this operation to
Divided into 2 minutes, 8 layers, 4m high embankment was constructed.
【００２１】（実施例４）図７は本発明における盛土表
面材の一実施例を示す。袋２の材質は孔の開いたポリエ
チレンフイルムであり、内部に発泡ポリスチレン（旭化
成工業製「アスパックサラサラ」；商品名）３０倍発泡
粒子を充填し、大きさが長さ（ｃ）３ｍ、幅（ａ）５０
ｃｍ、高さ（ｂ）４０ｃｍの袋体２を６ｍのスパンボン
ド不織布１にて巻くことにより連結したものである。(Embodiment 4) FIG. 7 shows an embodiment of the embankment surface material according to the present invention. The material of the bag 2 is a polyethylene film with holes, and is filled with 30 times expanded polystyrene (Asa Kasei Kogyo's "Aspack Sara Sara"; trade name) expanded particles, and the size is 3 m in length (c) and width ( a) 50
The bag 2 having a height of 40 cm and a height of 40 cm is connected by winding a spunbonded nonwoven fabric 1 having a length of 6 m.
【００２２】図８は図７を用いて構築された本発明に係
わる盛土構造物の実施例を示す。盛土先端部に発泡粒子
袋がくるように図７の盛土表面材を地盤上６に置き、帯
状のスパンボンド１を３ｍ盛土内部に向かい地盤の上に
延ばし、発泡粒子袋を残りの帯状のスパンボンドにて巻
込み、その上に土５をまき出し、４０ｃｍの厚さに転圧
し、第１層を形成する。次に、第１層の上に、更に図７
の盛土表面材を第１層形成時と同様に敷設し、帯状のス
パンボンド不織布１を延ばし、発泡粒子袋を帯状のスパ
ンボンドにて巻込み、その上に土をまき出し転圧し第２
層を形成する。この操作を繰り返し、１２層、高さ４．
８ｍの擁壁を構築した。FIG. 8 shows an embodiment of the embankment structure according to the present invention constructed using FIG. Place the embankment surface material shown in Fig. 7 on the ground 6 so that the foamed particle bag is located at the tip of the embankment, extend the band-shaped spunbond 1 toward the inside of the embankment for 3 m, and extend it on the ground, and leave the foamed particle bag in the remaining band-shaped span. It is wound up with a bond, and the soil 5 is sprinkled on it and rolled to a thickness of 40 cm to form a first layer. Then, on top of the first layer, a further FIG.
The embankment surface material is laid in the same manner as in the formation of the first layer, the strip-shaped spunbonded nonwoven fabric 1 is extended, the expanded particle bag is rolled up with the strip-shaped spunbond, and the soil is sprinkled onto it to roll it.
Form a layer. Repeat this operation, 12 layers, height 4.
Built an 8m retaining wall.
【００２３】[0023]
【発明の効果】端部に発泡粒子を充填したジオシンセテ
ィック袋を連結した帯状のジオシンセティックからなる
盛土表面材を提供し、該盛土表面材を用いることによ
り、排水性及び施工性に優れ、土構造物の法面あるいは
壁面保形性が良く、地盤になじみやすく、かつ破壊しに
くい強固な土構造物を構築することができる。EFFECTS OF THE INVENTION Provided is an embankment surface material composed of a band-shaped geosynthetic material in which a geosynthetic bag filled with foamed particles is connected to an end portion, and by using the embankment surface material, excellent drainage property and workability can be obtained. It is possible to construct a strong earth structure that has a good slope or wall shape retention of the structure, is easily adapted to the ground, and is not easily destroyed.
【図１】本発明に係る軽量盛土表面材の一具体例を一部
切欠断面図で示す。FIG. 1 is a partially cutaway sectional view showing a specific example of a lightweight embankment surface material according to the present invention.
【図２】本発明により構築される土構造物の具体例を概
略断面図で示す。FIG. 2 is a schematic sectional view showing a specific example of an earth structure constructed according to the present invention.
【図３】本発明に係る軽量盛土表面材の一具体例を一部
切欠断面図で示す。FIG. 3 is a partially cutaway sectional view showing a specific example of the lightweight embankment surface material according to the present invention.
【図４】本発明により構築される土構造物の具体例を概
略断面図で示す。FIG. 4 is a schematic sectional view showing a specific example of an earth structure constructed according to the present invention.
【図５】本発明に係る軽量盛土表面材の一具体例を一部
切欠断面図で示す。FIG. 5 is a partially cutaway sectional view showing a specific example of the lightweight embankment surface material according to the present invention.
【図６】本発明により構築される土構造物の具体例を概
略断面図で示す。FIG. 6 is a schematic sectional view showing a specific example of an earth structure constructed according to the present invention.
【図７】本発明に係る軽量盛土表面材の一具体例を一部
切欠断面図で示す。FIG. 7 is a partially cutaway sectional view showing a specific example of the lightweight embankment surface material according to the present invention.
【図８】本発明により構築される土構造物の具体例を概
略断面図で示す。FIG. 8 is a schematic sectional view showing a specific example of an earth structure constructed according to the present invention.
【図９】本発明において使用される発泡粒子の具体的形
状例、および発泡粒子の最大径を示す。FIG. 9 shows a specific shape example of the expanded beads used in the present invention and the maximum diameter of the expanded beads.
１ 帯状ジオシンセティック ２ ジオシンセティック製発泡粒子袋 ３ 発泡粒子 ４ ジオグリッド ５ 土 ６ 地盤 ７ 発泡粒子の形状例 ７ａ：球型 ７ｂ：Ｓ字状型 ７ｃ：眼鏡型 ７ｄ：星形 ７ｅ：ポテトチィプ型 ７ｆ：ボーン型 ７ｇ：傘型 ７ｈ：Ｌ字型 ７ｉ：Ｙ字型 1 Band-shaped geosynthetic 2 Foamed particle bag made of geosynthetic 3 Foamed particle 4 Geogrid 5 Soil 6 Ground 7 Shape example of foamed particle 7a: Spherical shape 7b: S-shaped shape 7c: Eyeglass type 7d: Star shape 7e: Potato chip type 7f : Bone type 7g: Umbrella type 7h: L type 7i: Y type
───────────────────────────────────────────────────── フロントページの続き (72)発明者 赤井 智幸 大阪府高槻市日吉台六番町58番37号 (72)発明者 松本 哲 大阪府大阪狭山市狭山５−2213−６（１− 302) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomoyuki Akai 58-37 Hiyoshidai Rokubancho, Takatsuki City, Osaka Prefecture (72) Inventor Satoshi Matsumoto 5-2213-6 (1-202) Sayama City, Osaka Prefecture Osaka Prefecture
Claims (5)
袋を端部に連結した帯状のジオシンセティックからなる
補強盛土表面材。1. A reinforced embankment surface material made of a band-shaped geosynthetic in which a geosynthetic bag filled with expanded particles is connected to an end thereof.
る請求項１記載の補強盛土表面材。2. The reinforced embankment surface material according to claim 1, wherein the expanded particles are polystyrene-based expanded particles.
強度が０．０５〜３．０ｋｇｆ／ｃｍ2 の発泡粒子であ
る請求項１記載の補強盛土表面材。3. The reinforced embankment surface material according to claim 1, which is a foamed particle having a 5% compressive strength of 0.05 to 3.0 kgf / cm 2 in a state of being filled with the foamed particle.
粒子である請求項１項記載の補強盛土表面材。4. The reinforced embankment surface material according to claim 1, wherein the expanded particles are expanded particles having a substantially S-shaped cross section.
袋を端部に連結した帯状のジオシンセティックからなる
補強盛土表面材が敷設された土層を積み重ねて形成した
土構造物。5. A soil structure formed by stacking soil layers on which a reinforced embankment surface material made of a band-shaped geosynthetic in which a geosynthetic bag filled with foamed particles is connected at its end is stacked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10862896A JPH09273152A (en) | 1996-04-05 | 1996-04-05 | Surface material for fill and earth structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10862896A JPH09273152A (en) | 1996-04-05 | 1996-04-05 | Surface material for fill and earth structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09273152A true JPH09273152A (en) | 1997-10-21 |
Family
ID=14489621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10862896A Withdrawn JPH09273152A (en) | 1996-04-05 | 1996-04-05 | Surface material for fill and earth structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09273152A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002302952A (en) * | 2001-04-05 | 2002-10-18 | Diatex Co Ltd | Sheet for reinforcement banking |
| JP2006028796A (en) * | 2004-07-13 | 2006-02-02 | Narasaki Sangyo Co Ltd | Uneven step elimination structure of road |
| US20120020745A1 (en) * | 2010-07-23 | 2012-01-26 | Miller Stanley Mark | Tubular sock module with integrated geogrid extensions for constructing stabilized-earth walls and slopes |
-
1996
- 1996-04-05 JP JP10862896A patent/JPH09273152A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002302952A (en) * | 2001-04-05 | 2002-10-18 | Diatex Co Ltd | Sheet for reinforcement banking |
| JP2006028796A (en) * | 2004-07-13 | 2006-02-02 | Narasaki Sangyo Co Ltd | Uneven step elimination structure of road |
| JP4506316B2 (en) * | 2004-07-13 | 2010-07-21 | ナラサキ産業株式会社 | Road leveling structure |
| US20120020745A1 (en) * | 2010-07-23 | 2012-01-26 | Miller Stanley Mark | Tubular sock module with integrated geogrid extensions for constructing stabilized-earth walls and slopes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20030701 |