JPH05295719A - Planar body for reinforcing ground - Google Patents
Planar body for reinforcing groundInfo
- Publication number
- JPH05295719A JPH05295719A JP4102824A JP10282492A JPH05295719A JP H05295719 A JPH05295719 A JP H05295719A JP 4102824 A JP4102824 A JP 4102824A JP 10282492 A JP10282492 A JP 10282492A JP H05295719 A JPH05295719 A JP H05295719A
- Authority
- JP
- Japan
- Prior art keywords
- strip
- lattice
- soft
- resin
- ground
- 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.)
- Granted
Links
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Road Paving Structures (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、地盤補強用材料に関す
る。更に詳しくは、柔軟、かつ適度な剛性を有する上、
衝撃や砕石に対する高い耐久性と、良好な敷設性・敷均
性とを兼ね備え、盛土や軟弱地盤、路盤、路床、アスフ
ァルト舗装の補強用に好適な地盤補強用面状体に関する
ものである。FIELD OF THE INVENTION The present invention relates to a ground reinforcing material. More specifically, in addition to having flexibility and appropriate rigidity,
The present invention relates to a ground-reinforcing sheet material that has both high durability against impacts and crushed stones and good layability and spreadability and is suitable for reinforcing embankments, soft ground, roadbeds, roadbeds, and asphalt pavements.
【０００２】[0002]
【従来の技術】盛土に於ける円弧すべり崩壊の防止、軟
弱地盤、路盤、路床における不等沈下や轍掘れの防止、
またアスファルト舗装に於ける轍掘れや流動化・クラッ
ク防止等を目的とするいわゆる地盤補強材としては、こ
れまでにポリオレフィン系樹脂有孔シートを一軸または
二軸延伸したジオグリッド、ポリアミド、ポリエステ
ル、アラミド繊維などを編織成した網状体、前記網状体
を樹脂、ゴム等の材料で被覆した網状成形体などが知ら
れている。2. Description of the Related Art Prevention of circular arc slip collapse in embankment, prevention of uneven subsidence and ruts in soft ground, roadbed and roadbed,
Further, as a so-called ground reinforcement material for the purpose of preventing rubbing, fluidization and cracks in asphalt pavement, geogrid, polyamide, polyester, aramid obtained by uniaxially or biaxially stretching a polyolefin resin perforated sheet has been used so far. BACKGROUND ART A net-like body obtained by weaving fibers or the like, a net-like molded body obtained by coating the net-like body with a material such as resin or rubber, and the like are known.
【０００３】[0003]
【発明が解決すべき課題】しかしながら、有孔樹脂シー
トを延伸したジオグリッドは、強度が低い上に伸びが大
きく十分な補強効果が得られない。さらに硬いために砕
石を衝撃輪荷重に対する耐久性に乏しく割れ易い上、堅
いために敷設性が悪く、被敷設面とのなじみが悪いとい
う問題があった。また、マルチフィラメントを編織成し
た網状体は、角ばった砕石等の直接的衝撃によって損傷
を受け易いなどの問題があった。更にまた、ポリアミ
ド、ポリエステル、アラミド繊維などのマルチフィラメ
ントで編織成した網状体を樹脂、ゴム等で被覆した網状
成形体は編織成に伴う繊維強度の劣化と伸びの増加に加
え、角ばった砕石による衝撃でヤーンの構成単繊維が切
断しやすいという問題があり、いずれも十分に満足でき
るものはなかった。このため、柔軟かつ適度な剛性があ
るうえ、衝撃や砕石に対する耐久性と良好な敷設性、敷
均性を兼ね備えた地盤補強用材料の開発が望まれてい
た。However, the geogrid obtained by stretching the perforated resin sheet has a low strength, a large elongation, and a sufficient reinforcing effect cannot be obtained. Further, since it is hard, the crushed stone has poor durability against an impact wheel load and is easily cracked, and because it is hard, it has a problem of poor layability and poor compatibility with the laying surface. Further, the net-like body in which the multifilaments are woven and woven has a problem that it is easily damaged by a direct impact such as angular crushed stone. Furthermore, a reticulated molded body in which a reticulated body woven with a multifilament such as polyamide, polyester, or aramid fiber is covered with resin, rubber, etc. is not only deteriorated in fiber strength and increased in elongation due to the weaving, but also due to angular crushed stones. There is a problem that the constituent monofilament of the yarn is easily cut by the impact, and none of them are sufficiently satisfactory. Therefore, it has been desired to develop a ground reinforcement material that is flexible and has appropriate rigidity, and has durability against impact and crushed stone, and good layability and evenness.
【０００４】[0004]
【課題を解決するための手段】本発明者等は前記の問題
点を解決する為に、鋭意研究を行った結果、帯状体に埋
設する繊維を特定の繊維形態および特定の繊度、特定の
埋設本数とすることによってこれらの問題点が解決でき
ることを見い出し、本発明を完成するに至った。Means for Solving the Problems The inventors of the present invention have conducted extensive studies to solve the above-mentioned problems, and as a result, have found that the fibers to be embedded in the strip have a specific fiber form, a specific fineness, and a specific embedding. It has been found that these problems can be solved by setting the number of lines, and the present invention has been completed.
【０００５】すなわち、本発明の目的はＪＩＳ Ｋ６３
０１の硬度（Ｈｅ：ＪＩＳ Ａ）が４０度〜１００度の
範囲にある軟質樹脂中に繊維が埋設された帯状体が格子
状に組み合わされ、その格子交点部が固着一体化されて
なる地盤補強用面状体において、帯状体中における埋設
繊維がモノフィラメントであり、該モノフィラメントの
繊度が１０００ｄ〜４０００ｄ、埋設本数が３本〜８本
であることを特徴とする地盤補強用面状体によって達成
される。That is, the object of the present invention is JIS K63.
Ground reinforcement in which a band-shaped body in which fibers are embedded in a soft resin having a hardness of 01 (He: JIS A) in the range of 40 degrees to 100 degrees is combined in a lattice shape and the lattice intersections are fixedly integrated. In a sheet-like body for embedding, the embedded fiber in the belt-like body is a monofilament, the fineness of the monofilament is 1000 d to 4000 d, and the number of embedded pieces is 3 to 8 It
【０００６】図面にしたがって本発明の１例を説明す
る。図１において、１は複数本のモノフィラメントが並
列にほぼ一定間隔をおいて軟質樹脂中に埋設された帯状
体をタテ、ヨコ方向に直交して組織させた後、格子交点
部を高周波ウエルダー機にて融着一体化することによっ
て作製された面状体、２は帯状体、３はモノフィラメン
ト、４は軟質樹脂、５は交点部、６は面状体の開口部で
ある。An example of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a plurality of monofilaments arranged in parallel at substantially regular intervals and embedded in a soft resin to form a band-shaped body orthogonal to the vertical and horizontal directions, and then the grid intersection is applied to a high-frequency welder machine. And 2 are strips, 3 is a monofilament, 4 is a soft resin, 5 is an intersection point, and 6 is an opening of the sheet.
【０００７】本発明の地盤補強用面状体は、押し出し
ダイを用いて帯状体の長手方向に沿って繊維を軟質樹脂
中に押し出して帯状体を作製する工程と、該帯状体を
格子状に組み合わせてその格子交点部を高周波ウエルダ
ー機または超音波ウエルダー機を用いて溶着する工程と
によって得ることができる。本発明に用いる繊維はモノ
フィラメントであることが必要である。地盤補強用面状
体には敷設性と敷均性に加え、耐砕石衝撃への耐久性が
より強く望まれるが、マルチフィラメントで構成したも
のは、柔軟性はあるものの腰が弱すぎて敷設性に難があ
る。この問題を解決する為に、樹脂層を厚くするとグリ
ッドの厚みが厚くなりすぎて製品の長尺化が困難になる
上、コストの増加をも招くことになる。一方、モノフィ
ラメントで構成したものは柔軟性と適度な剛性をほどよ
く付与することが容易である上、角ばった砕石等による
損傷に対してもマルチフィラメントに比べて優れた耐久
性を示す。繊維としては耐水性に優れ、引っ張り弾性
率、引っ張り強力が高く、破断伸度が低く、耐クリープ
特性のよいものが好ましく、そのような繊維としてポリ
アセタール繊維、ポリエステル繊維、ポリアミド繊維な
どが好適である。The ground-reinforcing sheet material of the present invention comprises a step of producing fibers by extruding fibers into a soft resin along the longitudinal direction of the belt using an extrusion die, and forming the belt-like material in a lattice form. In combination, the lattice intersections can be obtained by welding using a high-frequency welder machine or an ultrasonic welder machine. The fibers used in the present invention must be monofilaments. In addition to layability and spreadability, ground reinforcement sheet is strongly desired to have durability against crushing stone impact, but the one composed of multifilament has flexibility but is too weak and laying is difficult. There is difficulty in sex. In order to solve this problem, if the resin layer is made thick, the grid becomes too thick, making it difficult to lengthen the product and increasing the cost. On the other hand, those composed of monofilaments are easy to impart flexibility and appropriate rigidity, and also show superior durability to multifilaments against damage caused by angular crushed stones. As the fiber, those having excellent water resistance, high tensile elastic modulus, high tensile strength, low elongation at break, and good creep resistance are preferable, and as such fibers, polyacetal fiber, polyester fiber, polyamide fiber and the like are preferable. ..
【０００８】本発明においては、モノフィラメントの繊
度は１０００ｄ〜４０００ｄが用いられる。好ましくは
１５００ｄ〜３５００ｄ、より好ましくは２０００ｄ〜
３０００ｄである。１０００ｄ未満では１本当りの強度
が小さいために設計強度を確保するには埋設本数を増さ
なければならず、帯状体の幅が広くなってその結果、開
口率（一格子単位中における空隙部の平面面積率をい
う）の低下を招いて被拘束物の拘束効果を減少させるこ
とになる。更にまた、砕石による衝撃耐久性が十分でな
い上、製造コストの増加につながる。また、４０００ｄ
を越えると帯状体が剛性になって敷設性、敷均性を損な
う上、被覆材との接触表面積が減少するため、静摩擦力
の低下を招き、帯状体としての一体性を欠いて土層引き
抜き抵抗が低下する。帯状体中のモノフィラメントの埋
設本数は３本〜８本が用いられる。好ましくは３本〜７
本、より好ましくは３本〜６本である。２本以下では設
計強度を確保しにくい上に、繊度アップで対応しようと
すれば太くなって剛直化するとともに、接触表面積の減
少で土層引き抜き抵抗の低下につながる。また、９本以
上では帯状体の幅が広くなって、被拘束物の拘束効果の
低減と砕石耐久性の不足、製造コストの増加を招く。In the present invention, the fineness of the monofilament is 1000d to 4000d. Preferably 1500d-3500d, more preferably 2000d-
It is 3000d. If it is less than 1000 d, the strength per wire is small, so the number of embedded wires must be increased to secure the design strength, and the width of the strip becomes wider, resulting in an aperture ratio (void in one lattice unit). (Which means the area ratio of the plane) is reduced and the restraining effect of the restrained object is reduced. Furthermore, the impact durability due to the crushed stone is not sufficient, and the manufacturing cost is increased. Also 4000d
Beyond the range, the strip becomes stiff, impairing the layability and spreadability, and the surface area in contact with the coating material decreases, leading to a decrease in static friction force and lacking the integrity of the strip to pull out the soil layer. The resistance decreases. The number of embedded monofilaments in the strip is 3 to 8. Preferably 3 to 7
The number is more preferably 3 to 6. If the number is 2 or less, it is difficult to secure design strength, and if it is attempted to increase the fineness, it will become thick and stiff, and the contact surface area will decrease, leading to a reduction in soil layer extraction resistance. Further, if the number is 9 or more, the width of the strip becomes wide, which leads to a reduction in the restraining effect of the restrained object, a lack of crushed stone durability, and an increase in manufacturing cost.
【０００９】本発明では、繊維の横断面形状は円形をは
じめ種々の形状が使用できるが、土圧伝達効率の向上と
ならびに帯状体の厚み増加を極力抑える観点から偏平状
もしくは楕円状とすることが好ましい。帯状体の横断面
におけるモノフィラメントの配置形態の例を図２の
（ａ）−（ｄ）に示すが、本発明はこれらに限定されな
い。In the present invention, various cross-sectional shapes such as a circular shape can be used for the fiber, but in view of improving the earth pressure transmission efficiency and suppressing the increase in the thickness of the strip as much as possible, the fiber should be flat or elliptical. Is preferred. Examples of the arrangement form of the monofilaments in the cross section of the strip are shown in FIGS. 2A to 2D, but the present invention is not limited to these.
【００１０】本発明において、帯状体は補強用のモノフ
ィラメントを軟質樹脂で被覆して構成されていることが
重要である。帯状体を格子状に組み合せた面状体の敷均
性を確保する上で被覆材は柔軟性を有していることが不
可欠であるため、軟質樹脂が用いられる。軟質樹脂とは
ＪＩＳ Ｋ６３０１の硬度（Ｈｓ：ＪＩＳ Ａ）が４０
度〜１００度の範囲にあるものをいう。In the present invention, it is important that the strip is formed by coating a reinforcing monofilament with a soft resin. A soft resin is used because it is essential that the covering material has flexibility in order to secure the flatness of the planar body obtained by combining the belt-shaped bodies in a lattice shape. A soft resin has a JIS K6301 hardness (Hs: JIS A) of 40.
It is in the range of 100 to 100 degrees.
【００１１】例えばゴム・ワックス・軟質ポリ塩化ビニ
ル・ポリ酢酸ビニル・変性ポリ酢酸ビニル・エチレン−
酢酸ビニル共重合体・ポリ塩化ビニリデン・塩化ビニル
−酢酸ビニル共重合体・塩化ビニル−塩化ビニリデン共
重合体・ポリウレタン・変性ポリウレタン・ポリビニル
アルコール・変性ポリビニルアルコールおよび変性ポリ
アミドの中から選ばれたものおよびこれらの組成物など
をあげることができる。これらのうち、エチレン−酢酸
ビニル共重合樹脂は極めて好ましい。その理由は、押し
出し成形のしやすさ、製品の適当な柔軟性、補強用のモ
ノフィラメントとの付着力の確保（これは土層中での耐
引き抜き性能を高める上で重要な要素性能となる）の面
から優れた総合性能が得られるためである。この場合、
エチレン−酢酸ビニル共重合樹脂における酢酸ビニルの
重量比率は補強用繊維との付着力を高める点から１０％
〜３０％のものが好ましい。For example, rubber, wax, soft polyvinyl chloride, polyvinyl acetate, modified polyvinyl acetate, ethylene-
Vinyl acetate copolymer, polyvinylidene chloride, vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinylidene chloride copolymer, polyurethane, modified polyurethane, polyvinyl alcohol, modified polyvinyl alcohol and modified polyamide, and These compositions etc. can be mentioned. Of these, ethylene-vinyl acetate copolymer resin is extremely preferable. The reason is that it is easy to extrude, has appropriate flexibility of the product, and secures the adhesive force with the monofilament for reinforcement (this is an important element performance for enhancing the pull-out resistance in the soil layer). This is because excellent overall performance can be obtained from the aspect. in this case,
The weight ratio of vinyl acetate in the ethylene-vinyl acetate copolymer resin is 10% from the viewpoint of enhancing the adhesive force with the reinforcing fiber.
It is preferably about 30%.
【００１２】軟質樹脂（被覆材）中に埋設されたモノフ
ィラメントを外部衝撃から保護する観点から、帯状体は
帯状体中に埋設されたモノフィラメントの厚み方向にモ
ノフィラメントの厚みと同程度又はそれ以上の厚みの樹
脂層で被覆されていることが好ましい。アスファルト舗
装補強用途には帯状体の表面が、レゾルシン−ホルムア
ルデヒド縮合物、レゾルシン−ホルムアルデヒド−ラテ
ックス熟成物、アスファルト、石油樹脂等のいわゆるア
スファルト密着性材料で被覆されていることが好まし
い。From the viewpoint of protecting the monofilament embedded in the soft resin (covering material) from external impact, the strip has a thickness in the thickness direction of the monofilament embedded in the strip that is equal to or greater than the thickness of the monofilament. It is preferably covered with the resin layer of. For the purpose of reinforcing asphalt pavement, the surface of the strip is preferably coated with a so-called asphalt adhesive material such as a resorcin-formaldehyde condensate, a resorcin-formaldehyde-latex aged product, asphalt and a petroleum resin.
【００１３】本発明の面状体の開口部の一辺の長さは１
０ｍｍ〜６０ｍｍの範囲にあるのが好ましい、より好ま
しくは２０ｍｍ〜５０ｍｍ、さらに好ましくは２５ｍｍ
〜４０ｍｍの範囲である。開口率（−格子単位中に占め
る空隙部の平面面積率をいう）は２０％〜８０％の範囲
が好ましい。より好ましくは土構造物用には３０％〜７
５％、アスファルト舗装用途には３０％〜７０％、さら
に好ましくは土構造物用には４０％〜７０％、アスファ
ルト舗装用途には４０％〜６０％である。The length of one side of the opening of the sheet according to the present invention is 1
It is preferably in the range of 0 mm to 60 mm, more preferably 20 mm to 50 mm, further preferably 25 mm.
The range is -40 mm. The aperture ratio (-refers to the plane area ratio of voids in the lattice unit) is preferably in the range of 20% to 80%. More preferably 30% to 7 for earth structures
5%, 30% to 70% for asphalt paving applications, more preferably 40% to 70% for soil structures, and 40% to 60% for asphalt paving applications.
【００１４】面状体の厚みは１ｍｍ〜６ｍｍの範囲にあ
るのが好ましく、より好ましくは１．５ｍｍ〜３ｍｍの
範囲である。面状体のタテ方向の引っ張り強度は２トン
／ｍ幅以上であることが好ましく、より好ましくは１０
トン／ｍ幅以上である。帯状体を用いて格子状構造体
（面状体）を得る方法としては、タテ方向とヨコ方向
に直交させて単純に積層する方法、タテ方向とヨコ方
向を組織させる方法等が用いられる。特に急勾配盛土補
強用途のように作用荷重の方向性が特定しにくい用途に
は後者の方が耐久性が高い。The thickness of the sheet is preferably in the range of 1 mm to 6 mm, more preferably 1.5 mm to 3 mm. The tensile strength of the sheet in the vertical direction is preferably 2 tons / m width or more, more preferably 10
Ton / m width or more. As a method for obtaining a lattice-shaped structure (planar body) using a band-shaped body, a method of simply stacking them in a direction orthogonal to the vertical direction and the horizontal direction, a method of organizing the vertical direction and the horizontal direction, and the like are used. In particular, the latter is more durable for applications where it is difficult to specify the directionality of the applied load, such as applications for reinforcing steep embankments.
【００１５】面状体の格子交点部を固着一体化する手段
としては、高周波あるいは超音波エネルギーによる内部
加熱タイプの熱融着法が、交点部固着強度、製品外観、
生産性、製造コストなどの点で極めて合理的な手段であ
る。以下に、実施例によって本発明を具体的に説明する
が、本発明はこれらの例によって何ら限定されるもので
はない。なお、以下の例において、ポリアセタール繊維
は特開昭６０−１８３１２２号公報記載の方法によって
作製した。As a means for fixing and integrating the lattice intersection points of the planar body, an internal heating type heat fusion method using high frequency or ultrasonic energy is used.
It is an extremely rational means in terms of productivity and manufacturing cost. The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. In the following examples, the polyacetal fiber was produced by the method described in JP-A-60-183122.
【００１６】[0016]
【実施例１〜９および比較例１〜４】円形横断面をも
ち、引っ張り強度が１３ｇ／ｄを示すポリアセタールの
モノフィラメント（５００ｄ〜５０００ｄ）を芯材とし
て、押し出しダイを用いて帯状体中の埋設本数を変化さ
せて、エチレン−酢酸ビニル共重合樹脂（旭化成工業
（株）、登録商標「サンテックエバ」、酢酸ビニル含有
重量比率１５％）で被覆して帯状体を作製した。この際
の被覆樹脂層の厚み（片面分の厚み）は芯材の直径が
０．５ｍｍ未満については−率に０．５ｍｍ、０．５ｍ
ｍ以上についてはそれぞれの芯材直径と同一とした。ま
た、隣接する芯材間の間隙は０．４ｍｍとなるように配
設した。次いで帯状体を芯間距離４０ｍｍ×４０ｍｍに
保って格子状に直交させて組織し、格子交点部を高周波
ウエルダー機を用いて融着一体化して図１に示すような
タテ・ヨコ方向の引っ張り強度が同一の面状体を作製し
た。供試面状体の構成を性能評価結果と共に表１に示
す。Examples 1 to 9 and Comparative Examples 1 to 4 Embedding in a band using an extrusion die using a polyacetal monofilament (500d to 5000d) having a circular cross section and a tensile strength of 13 g / d as a core material. The number was changed and coated with an ethylene-vinyl acetate copolymer resin (Asahi Kasei Kogyo Co., Ltd., registered trademark "Suntec EVA", vinyl acetate content weight ratio 15%) to prepare a band. At this time, the thickness of the coating resin layer (thickness for one surface) is 0.5 mm, 0.5 m in minus ratio when the diameter of the core material is less than 0.5 mm.
About m or more, it was made the same as each core material diameter. Further, the gap between the adjacent core materials was arranged to be 0.4 mm. Then, the band-shaped body is structured by orthogonally forming it in a lattice shape while maintaining a center-to-center distance of 40 mm × 40 mm, and the lattice intersections are fused and integrated by using a high-frequency welder to pull strength in the vertical and horizontal directions as shown in FIG. The same planar body was produced. Table 1 shows the configuration of the test piece together with the performance evaluation results.
【００１７】[0017]
【実施例１０、１１】円形横断面をもち、引っ張り強度
が１０ｇ／ｄを示すポリエステルモノフィラメント（３
０００ｄ）を芯材として用い、帯状体中の埋設本数を変
化させた以外は実施例１〜９・比較例１〜４と全く同様
の要領で、帯状体および面状体を作製した。Examples 10 and 11 Polyester monofilaments (3 having a circular cross section and a tensile strength of 10 g / d)
000d) was used as the core material and the number of embedded pieces in the strip was changed, and strips and sheets were prepared in exactly the same manner as in Examples 1-9 and Comparative Examples 1-4.
【００１８】供試面状体の構成を性能評価結果と共に表
１に示す。Table 1 shows the structure of the test piece together with the performance evaluation results.
【００１９】[0019]
【比較例５】引っ張り強度が９ｇ／ｄのポリエステル１
５００ｄマルチフィラメントを２本合わせ、５０Ｔ／Ｍ
の撚りをかけて作製した３０００ｄの合撚糸を、芯材と
して帯状体中に６本埋設した以外は実施例１〜１１・比
較例１〜４と全く同様の要領で帯状体および面状体を作
製した。Comparative Example 5 Polyester 1 having a tensile strength of 9 g / d
50T / M with two 500d multifilaments
In the same manner as in Examples 1 to 11 and Comparative Examples 1 to 4 except that six 3000d plied yarns produced by twisting the above were embedded in the belt as a core material. It was made.
【００２０】供試面状体の構成を性能評価結果と共に表
１に示す。 ＜引き抜きせん断試験＞本発明の面状体および比較の面
状体を土層中に埋設し、引き抜きせん断試験を行った。
試験槽内部に水平に敷設した面状体は幅３０ｃｍ、長さ
７０ｃｍとした。引き抜き方向は面状体のタテ方向とし
た。砂は豊浦標準砂を用いた。引き抜き速度は１ｍｍ／
ｍｉｎ、土圧は１ｋｇ・ｆ／ｃｍ2 とした。引き抜き抵
抗力の最大値を測定し、ｍ幅当りの引っ張り強度で除し
て強力利用率を求めた。試験結果を供試体の構成内容と
ともに表１に示す。Table 1 shows the structure of the test piece together with the performance evaluation results. <Pull-out shear test> The planar article of the present invention and the comparative planar article were embedded in a soil layer, and a pull-out shear test was conducted.
The planar body horizontally laid inside the test tank had a width of 30 cm and a length of 70 cm. The pull-out direction was the vertical direction of the planar body. The sand used was Toyoura standard sand. Extraction speed is 1 mm /
min and earth pressure was 1 kg · f / cm 2 . The maximum value of pull-out resistance was measured and divided by the tensile strength per m width to obtain a strong utilization factor. The test results are shown in Table 1 together with the constitutional contents of the specimen.
【００２１】（柔軟性と剛性の評価尺度） △： 柔軟 ○： 適度な剛性 ×： 剛直 結果が示すごとく、本発明の面状体は、比較例の面状体
に比べて引き抜き抵抗応力が高くなるため、急勾配盛土
など大きな引っ張り力が作用するような用途分野に対し
ても極めて高い適性を示すことが判った。 ＜柔軟性評価＞本発明の面状体を比較の面状体と対比し
てハンドリングによる評価をおこなった。結果が示すご
とく、本発明の面状体はいずれも柔軟かつ適度な剛性が
あるために取扱性がよく、施工面とのなじみも極めて良
いことが判った。比較の面状体は、柔らかすぎて取扱性
が不良であったり、反対に硬すぎて施工面とのなじみが
悪くなるなど改善すべき課題の多いことが判った。 ＜敷設性および敷設耐久性評価＞実施例６および実施例
８の面状体を、比較例２および比較例５の面状体と共
に、軟弱路盤上に敷設し、その時の敷設作業性および敷
設状態を調べた。さらに、面状体の上に砕石を８０ｃｍ
の高さに敷きつめて仮設道路を築造し、その上を重量１
００トンの重ダンプカーを２０回走行させて、道路の轍
掘れおよび試験後の面状体の残存強度保持率を調べた。(Evaluation Scale for Flexibility and Rigidity) Δ: Flexibility ◯: Moderate Rigidity ×: Rigidity As shown by the results, the planar body of the present invention has a higher pull-out resistance stress than the planar body of Comparative Example. Therefore, it was found to be extremely suitable even for application fields where a large tensile force acts such as a steep slope embankment. <Flexibility Evaluation> The planar article of the present invention was compared with the comparative planar article and evaluated by handling. As the results show, it was found that all of the sheet-like bodies of the present invention were flexible and had appropriate rigidity, so that they were easy to handle and were extremely compatible with the construction surface. It has been found that the comparative sheet has many problems to be solved, such as being too soft and poor in handleability, and conversely being too hard to be compatible with the construction surface. <Evaluation of Laying Property and Laying Durability> The sheet-like bodies of Examples 6 and 8 were laid together with the sheet-like bodies of Comparative Example 2 and Comparative Example 5 on a soft roadbed, and the laying workability and laying state at that time were laid. I checked. Furthermore, crushed stones 80 cm on the sheet
To build a temporary road with a weight of 1
A heavy duty dump truck of 00 tons was run 20 times, and the residual strength retention rate of the planar body after the road rut and the test was examined.
【００２２】その結果、本発明の面状体は敷設作業性が
よく、敷設状態も面状体のうねりがほとんどなく非常に
良好であった。道路の轍掘れも小さく重機械の走行にと
って好ましい状態であった。また、試験後の面状体を取
り出して残存強度を調べたところ殆んど劣化は認められ
なかった。これに対して比較例の面状体は、柔らかすぎ
て敷設作業性にやや難がある上、試験後の面状体に残存
強度の低下がみられた。As a result, the planar body of the present invention had a good laying workability, and the laid state was very good with almost no undulation of the planar body. The rut on the road was small and it was in a favorable condition for running heavy machinery. Further, when the sheet-like body after the test was taken out and the residual strength was examined, almost no deterioration was observed. On the other hand, the planar body of the comparative example was too soft and had some difficulty in laying workability, and the residual strength of the planar body after the test was decreased.
【００２３】[0023]
【表１】 [Table 1]
【００２４】[0024]
【発明の効果】本発明の面状体は、土中引き抜きに対す
る引き抜き抵抗応力が高い上、適度な剛性と柔軟性とを
有しているためにハンドリング性と敷均性が向上する。
また、本発明の面状体は、補強用繊維としてモノフィラ
メントを使用しているために角ばった砕石などの衝撃に
対しても高い耐久性を発揮する。EFFECTS OF THE INVENTION Since the sheet-like body of the present invention has a high pull-out resistance stress against pulling out into the soil and has appropriate rigidity and flexibility, the handleability and the flatness are improved.
Further, since the sheet-shaped body of the present invention uses the monofilament as the reinforcing fiber, it exhibits high durability against the impact of angular crushed stone.
【００２５】更に、本発明の面状体は使用している繊維
の強力を最大限に利用し得ると共に、編織成などの複雑
な工程を必要としないで製造できるので極めて短時間
で、容易に製造できる。Furthermore, the sheet-like article of the present invention can make the most of the strength of the fibers used and can be produced without requiring complicated steps such as knitting and weaving, so that it can be easily performed in an extremely short time. Can be manufactured.
【図面の簡単な説明】[Brief description of drawings]
【図１】図１は、本発明の面状体構造の概略図である。FIG. 1 is a schematic view of a sheet structure of the present invention.
【図２】図２は、本発明において、帯状体の横断面にお
けるモノフィラメントの配置形態の一例を示す模式図で
ある。FIG. 2 is a schematic view showing an example of arrangement form of monofilaments in a cross section of a strip in the present invention.
１ 本発明の面状体 ２ 帯状体 ３ モノフィラメント ４ 軟質樹脂 ５ 交点部 ６ 面状体の開口部 DESCRIPTION OF SYMBOLS 1 Planar body 2 of this invention 2 Band body 3 Monofilament 4 Soft resin 5 Intersection part 6 Opening part of planar body
Claims (1)
Ｓ Ａ）が４０度〜１００度の範囲にある軟質樹脂中に
繊維が埋設された帯状体が、格子状に組み合わされ、そ
の格子交点部が固着一体化されてなる地盤補強用面状体
において、帯状体中における埋設繊維がモノフィラメン
トであり、モノフィラメントの繊度が１０００ｄ〜４０
００ｄ、埋設本数が３本〜８本であることを特徴とする
地盤補強用面状体。1. The hardness of JIS K6301 (HS: JI
In a surface-reinforcing body for ground reinforcement, a band-shaped body having fibers embedded in a soft resin having a SA of 40 to 100 degrees is combined in a lattice shape and the lattice intersections are fixedly integrated. , The embedded fiber in the strip is a monofilament, and the monofilament has a fineness of 1000 d to 40
00d, the number of buried pieces is 3 to 8, and a ground reinforcement sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4102824A JP3061475B2 (en) | 1992-04-22 | 1992-04-22 | Ground reinforcement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4102824A JP3061475B2 (en) | 1992-04-22 | 1992-04-22 | Ground reinforcement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05295719A true JPH05295719A (en) | 1993-11-09 |
| JP3061475B2 JP3061475B2 (en) | 2000-07-10 |
Family
ID=14337774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4102824A Expired - Fee Related JP3061475B2 (en) | 1992-04-22 | 1992-04-22 | Ground reinforcement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3061475B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002302952A (en) * | 2001-04-05 | 2002-10-18 | Diatex Co Ltd | Sheet for reinforcement banking |
| JP2002371558A (en) * | 2001-06-18 | 2002-12-26 | Diatex Co Ltd | Civil engineering sheet |
-
1992
- 1992-04-22 JP JP4102824A patent/JP3061475B2/en not_active Expired - Fee Related
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 |
| JP2002371558A (en) * | 2001-06-18 | 2002-12-26 | Diatex Co Ltd | Civil engineering sheet |
| JP4511081B2 (en) * | 2001-06-18 | 2010-07-28 | ダイヤテックス株式会社 | Civil engineering sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3061475B2 (en) | 2000-07-10 |
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