JP2004211426A - Connecting member for slope face reinforcing unit, banking reinforcing structure and banking reinforcing construction method using this connecting member - Google Patents

Connecting member for slope face reinforcing unit, banking reinforcing structure and banking reinforcing construction method using this connecting member Download PDF

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Publication number
JP2004211426A
JP2004211426A JP2003000213A JP2003000213A JP2004211426A JP 2004211426 A JP2004211426 A JP 2004211426A JP 2003000213 A JP2003000213 A JP 2003000213A JP 2003000213 A JP2003000213 A JP 2003000213A JP 2004211426 A JP2004211426 A JP 2004211426A
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Japan
Prior art keywords
reinforcing
embankment
slope
connecting member
unit
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JP2003000213A
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Japanese (ja)
Inventor
Masamichi Amano
正道 天野
Takayuki Hamashima
高之 浜島
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Bridgestone Corp
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Bridgestone Corp
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Priority to JP2003000213A priority Critical patent/JP2004211426A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a connecting member for a slope face reinforcing unit, a banking reinforcing structure and a banking reinforcing construction method using this connecting member for surely excluding the possibility of slipping-out of a banking reinforcing member with a simple structure. <P>SOLUTION: This connecting member 1 mutually connects slope face reinforcing units 2 and 3 arranged on a face of slope of banking and the banking reinforcing member 6 buried in the banking, and is composed of a hooking part 1C with the slope face reinforcing units 2 and 3, a connecting part 1D with the banking reinforcing member 6 and a body part 1E between the parts. The hooking part 1C is formed in the shape of extending in the upward direction of the slope face reinforcing units 2 and 3, and the connecting part 1D is formed in the shape of allowing the tip to reach up to the body part 1E by being folded back in the upward direction. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、盛土の形状を保つために盛土法面に設置される法面補強ユニットの連結部材、それを用いた盛土補強構造及び盛土補強工法に関するものである。
【0002】
【従来の技術】
従来から、盛土の崩壊を防ぐために、各種の盛土補強構造が採用されている。特に、法面補強ユニットを配置して法面の形状を維持する盛土補強構造は、盛土の安定と法面の緑化及び保護を一体化することができるので、近年、数多く採用されている。すなわち、図5に示すように、エキスパンドメタル等からなる法面補強ユニット12と、ジオテキスタイルと呼ばれる盛土補強部材16によって盛土を補強するのである。そして、法面補強ユニット12と盛土補強部材16との連結には、図6に示すような連結部材11を使用し、山形又は半円形に折れ曲がった接続部11Dで固定していた(例えば、特許文献1参照。)。
【0003】
【特許文献1】
特開2001−11865号公報 (第4頁、図4)
【0004】
【発明が解決しようとする課題】
しかしながら、図6(A)及び図6(B)に示す山形の接続部11Dでは、盛土補強部材16が抜け出さないように、盛土補強部材16の上面と接続部11Dの山形の内面とでできた隙間に、必ず連結棒17を差し込まなければならない。一方、図6(C)及び図6(D)に示す半円形の接続部11Dでは、連結棒は不要となるが、土圧等によって盛土補強部材16が強く引っ張られた場合、接続部11Dの半円形が開いて直線的になり、盛土補強部材16が抜け出しやすくなるという可能性があった。
【0005】
そこで本発明は、簡単な構造で、盛土補強部材の抜け出しの可能性を確実に排除することができる法面補強ユニット用連結部材、それを用いた盛土補強構造及び盛土補強工法を提供することを目的とするものである。
【0006】
【課題を解決するための手段】
本発明は、以上の課題を解決するためになされたものであって、その要旨は、法面補強ユニットとの引掛部と、盛土補強部材との接続部と、その間の本体部とからなり、引掛部が、法面補強ユニットの上方向に伸びる形状となっており、接続部が、上方向に折り返されて先端が本体部まで達する形状となっている法面補強ユニット用連結部材に係るものであり、好ましくは、複数の縦棒の一端をそれぞれL字状に折り曲げて引掛部とすると共に、他端をそれぞれ円状に折り曲げて接続部とし、隣り合う本体部同士を横棒で固定した法面補強ユニット用連結部材に係るものである。
【0007】
又、上記の連結部材と、側面視がL字状の法面補強ユニットと、法面補強ユニットのL字状の縦辺部と底辺部との間を連結し補強するテンションバーと、網目状の盛土補強部材とからなり、法面補強ユニットの縦辺部の開口部に連結部材の本体部が挿入され、連結部材の接続部に盛土補強部材の網目が挿入されている盛土補強構造に係るものであり、好ましくは、連結部材の接続部が、法面補強ユニットとテンションバーとで構成される三角形の内側に位置する盛土補強構造に係るものである。なお、連結部材の接続部に挿入された盛土補強部材の網目の上面と、接続部の内面とでできた隙間には、連結棒が差し込まれていてもよい。
【0008】
更に、上記の連結部材を用いた盛土補強工法であって、下段となる法面補強ユニットの内側に、上端の開口部を残して土砂を盛った後、上段となる法面補強ユニットの下端の開口部を、下段の法面補強ユニットの内側で、かつ、開口部同士を一致させて設置し、続いて、内側から連結部材の引掛部を両開口部に挿入して上下の法面補強ユニットを連結することで、順次法面補強ユニットを重ね合わせて盛土を構築する盛土補強工法に係るものである。
【0009】
【発明の実施の形態】
本発明において、連結部材は、盛土の法面に設置される法面補強ユニットと、盛土内に埋設される盛土補強部材とを相互に連結するためのものである。ここで法面補強ユニットとは、盛土の形状を保つために盛土の法面に設置され、上下左右に連結されて盛土を補強するものである。又、盛土補強部材とは、盛土自体の補強のために敷設され、盛土中に埋設される網目状の合成樹脂からなるものである。
【0010】
連結部材としては、例えば、複数の縦棒の一端をそれぞれL字状に折り曲げて引掛部とする。又、他端をそれぞれ上方向に円状に折り曲げて、先端が本体部まで達するようにして接続部とする。更に、複数の縦棒の隣り合う本体部同士を横棒で固定して一組とする。そして、上下の法面補強ユニットは、その内側から連結部材の引掛部を開口部に挿入して連結するのである。すなわち、法面補強ユニットの法面部は一般に網部材から構成されるので、上下端を含めて複数の開口部を有している。そこで、上段となる法面補強ユニットの下端の開口部と、下段となる法面補強ユニットの上端の開口部とを一致させて一つの開口部とし、この開口部に連結部材の引掛部を斜めにして(L字状の縦辺部の実質的な高さを低くして)挿入した後、元の状態に戻してやれば、引掛部は開口部から抜けなくなり、上下の法面補強ユニットが連結されるのである。
【0011】
尚、引掛部は縦棒の一端を上方に折り曲げるだけでなく、別部材の溶接、回動可能とした接続、打ち抜き等によって側面視がL字状となされ、かつ、全体を斜めにしたり、L字状の縦辺部を折り畳んだり等することによって、法面補強ユニットの開口部に挿入可能となされたものであればよい。又、引掛部は開口部の開口ピッチに一対一に、或いは数個おきに合致させて複数設ける。
【0012】
一方、連結部材の他端は盛土補強部材との接続部となされている。接続部の形状は、上方向に折り返されて先端が本体部まで達している形状(例えば円状)とする。そして、盛土補強部材の網目を上方から接続部に挿入し、折り返された先端に網目を引っ掛けることによって、盛土補強部材を抜けないように接続するのである。従って、本発明の連結部材によれば、土圧等によって盛土補強部材が強く引っ張られた場合、接続部の折り返しをきつくする方向(円状ならばその直径を小さくする方向)に引張力が作用するので、接続部の折り返しが開くことはなく、盛土補強部材の抜け出しの可能性が確実に排除される。
【0013】
尚、折り返された先端は盛土補強部材が引っ掛かればよく、必ずしも本体部と接触していなくてもよい。又、法面補強ユニットと盛土補強部材との連結を一層確実なものとし、盛土補強部材が連結部材の接続部の上からも抜けないようにするため、盛土補強部材の網目の上面と接続部の内面とでできた隙間に、連結棒を差し込むこともできる。
【0014】
又、本発明の連結部材を使用することによって、簡単に盛土補強構造を構築することができる。すなわち、側面視がL字状の法面補強ユニットを上記した通り上下に連結すると共に、盛土補強部材を接続し、法面補強ユニットのL字状の縦辺部と底辺部との間をテンションバーで連結するのである。ここで、テンションバーを使用するのは、テンションバーによって法面補強ユニットが全体として側面視で三角形を形成することになり、土圧等に対して強度的に優れたものとなるからである。但し、連結部材の接続部は、法面補強ユニットとテンションバーとで構成される三角形の内側に位置させることが好ましい。特別な工夫をすることなく、連結部材の接続部とテンションバーとの干渉が防止できるからである。
【0015】
ここで、法面補強ユニットとしては、各種の網部材を使用することができる。すなわち、メッキ又は樹脂コーティング等を行なって製造された溶接金網、線材の交差部分をねじり合わせ状に接続することにより構成した亀甲金網、ひし形金網、その他エキスパンドメタル等の金網類、又はグレーチング等の各種格子部材であるが、中でも、エキスパンドメタルを折り曲げて側面視をL字状としたものを使用することが好ましい。簡単に自立させることができ、強度的にも優れた法面補強ユニットを経済的に得ることができるからである。この場合、連結部材が挿入される開口部は、上端又は下端に位置する網目となる。
【0016】
尚、網目によっては法面補強ユニット自体で法面を緑化することも可能であるが、網目が大きい場合やより迅速に緑化したい場合には、内側に植生シートを配設してやればよい。この場合、植生シートは法面補強ユニットの網目より目の細かいものとすることで、盛土の安定と法面の緑化及び保護を一体化する。又、法面補強ユニットの内側には不織布等からなる盛土保持部材を設置することが好ましい。
【0017】
次に、上記した連結部材を用いた盛土補強工法について説明する。まず、法面補強ユニットのL字状の底辺部を使って法面補強ユニットを自立させ、法面補強ユニットの内側に概略25cmから30cm毎に土を積層し、振動ローラ等で転圧して最下段の法面補強ユニットを設置する。この時、法面補強ユニットの上端の開口部だけ残して土を積層しておく。
【0018】
続いて、最下段の法面補強ユニットの内側であって、積層した土の上に、上段の法面補強ユニットを自立させる。この時、上下の法面補強ユニットの開口部を一致させておく。そして、開口部の内側から連結部材の引掛部を挿入して引っ掛け、上下の法面補強ユニットを連結する。その後、連結部材の接続部に盛土補強部材を固定し、連結部材の引掛部に緩みが生じないように盛土補強部材を引っ張っておく。最後に、上段の法面補強ユニットの内側及び盛土補強部材の上に土を積層し、上記と同様の方法を繰り返すことによって補強された盛土を構築するのである。
【0019】
【実施例】
以下、本発明の好ましい実施の形態の具体例を図面に基づいて説明する。図1は、本発明の法面補強ユニット用連結部材の一例を示す斜視図である。図1に示すように、連結部材1は、縦棒1Aと横棒1Bとを交差させて溶接したものであって、縦棒1Aの一端を上方に折り曲げて引掛部1Cとし、引掛部1Cと本体部1Eとの間で側面視がL字状となされている。又、引掛部1Cは図示しない法面補強ユニットの開口部に挿入可能なものとなっており、縦棒1Aの間隔は、法面補強ユニットの開口部に一対一に対応した寸法となっている。一方、縦棒1Aの他端は、上方向に折り返されて先端が本体部1Eまで達しており、円状に折り曲げられた接続部1Dとなっている。
【0020】
図2及び図3は、図1に示す実施例の連結部材1を用いて下段の法面補強ユニット2と上段の法面補強ユニット3とを連結する方法を示す断面図である。図2において、まず、エキスパンドメタルを折り曲げて側面視がL字状となるようにした下段の法面補強ユニット2を地盤4上に自立させる。同時に、側面視がS字状のテンションバー5を法面補強ユニット2のL字状の縦辺部と底辺部との間にそれぞれ引っ掛けて補強とする。尚、テンションバー5は、法面補強ユニット2の幅方向に2m間隔で3〜4本取り付けておく。
【0021】
次に、法面補強ユニット2の内側に、上端の開口部2Aを残して盛土する(便宜上、盛土は図示しない)。その後、盛土上に同様に法面補強ユニット3を自立させる。この時、法面補強ユニット2の開口部2Aと法面補強ユニット3の開口部3Aとが一致するようにしておく。尚、テンションバー5も上記と同様に取り付けておく。
【0022】
続いて、連結部材1を傾けて、引掛部1Cの実質高さHを開口部2A及び3Aの開口幅Wよりも低くしておき、矢印のように挿入する。挿入後の状態は、図3に示す通りである。すなわち、連結部材1を水平に戻せば、引掛部1Cの先端が開口部2A及び3Aに引っ掛かり、法面補強部材2と法面補強部材3とが連結される。
【0023】
又、図3において、連結部材1の接続部1Dには盛土補強部材6の一端が固定されている。一方、盛土補強部材6の他端は盛土上に図示しないアンカーで固定されている。従って、連結部材1の引掛部1Cの上端は開口部2Aの上部に当接した状態となり、法面補強部材2及び法面補強部材3は引掛部1Cと盛土との間で強固に固定され、連結されるのである(但し、図3では便宜上、引掛部1C、法面補強ユニット2、法面補強ユニット3の間を当接させていない)。
【0024】
図4は、図1に示す実施例の連結部材1に、網目状の合成樹脂製の盛土補強部材6を固定した状態を示す側面図及び上面図である。すなわち、図4(A)及び図4(B)に示すように、連結部材1の接続部1Dに盛土補強部材6の網目6Aをかぶせて嵌め込んで固定する。すると、網目6Aが円状の接続部1Dの先端側に引っ掛かるようになる。この状態で、盛土補強部材6が土圧等によって引っ張られると、円状の接続部1Dの直径を小さくする方向に引張力が作用する。従って、接続部1Dの折り返しが開いてしまうことはなく、盛土補強部材6が抜け出るようなことはない。又、図4(C)及び図4(D)に示すように、盛土補強部材6の網目6Aの上面と連結部材1の接続部1Dの内面とでできた隙間に連結棒7を差し込んで、盛土補強部材6が接続部1Dの上から抜けないようにすることもできる。
【0025】
尚、法面補強ユニットとしては、エキスパンドメタルの他に、線径φ6mmの金属丸棒を所定の位置にセットして全体を格子状に溶接し、メッキ又は樹脂コーティングを行なって製造された溶接金網、線径が4.0mmで網目が100mm(横方向の対角線長さは160mm)のひし形金網、線径が4.0mmや3.2mmで網目が80mmや100mmの亀甲金網等を使用することもできる。
【0026】
又、盛土補強部材としては、ポリエステル糸を格子状に組み合わせて特殊合成樹脂をコーティングしたネット型シート等が使用できる。ネット型シートは網目構造のため、軟弱地盤や盛土とのなじみもよく、又、上下の土砂が適度に混合して大きな摩擦抵抗を発揮できるものである。更に、強度が高く軽量で耐候性を併せ持つものであるため、省力化、省コスト化が可能であり、盛土補強工事に最適なものである。
【0027】
【発明の効果】
以上説明したように、本発明の法面補強ユニット用連結部材は、法面補強ユニットとの引掛部と、盛土補強部材との接続部と、その間の本体部とからなり、引掛部が、法面補強ユニットの上方向に伸びる形状となっており、接続部が、上方向に折り返されて先端が本体部まで達する形状となっているので、簡単な構造で、盛土補強部材の抜け出しの可能性を確実に排除することができる。又、本発明の法面補強ユニット用連結部材を使用することにより、施工が簡単で信頼性に特に優れた盛土補強構造及び盛土補強工法とすることができる。
【図面の簡単な説明】
【図1】図1は、本発明の法面補強ユニット用連結部材の一例を示す斜視図である。
【図2】図2は、図1に示す実施例の連結部材を使用して上下の法面補強ユニットを連結する方法を示す断面図である。
【図3】図3は、図1に示す実施例の連結部材を使用して上下の法面補強ユニットを連結した状態を示す断面図である。
【図4】図4は、図1に示す実施例の連結部材に盛土補強部材を接続した状態を示す側面図及び上面図である。
【図5】図5は、盛土補強構造の例を示す斜視図である。
【図6】図6は、従来の法面補強ユニット用連結部材を示す斜視図である。
【符号の説明】
1‥連結部材
1A‥縦棒
1B‥横棒
1C‥引掛部
1D‥接続部
1E‥本体部
2‥下段の法面補強ユニット
2A‥開口部
3‥上段の法面補強ユニット
3A‥開口部
4‥地盤
5‥テンションバー
6‥盛土補強部材
6A‥網目
7‥連結棒
11‥連結部材
11D‥接続部
12‥法面補強ユニット
16‥盛土補強部材
16A‥網目
17‥連結棒
H‥引掛部の実質高さ
W‥開口幅
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a connection member of a slope reinforcing unit installed on an embankment slope to maintain the shape of the embankment, an embankment reinforcement structure using the same, and an embankment reinforcement method.
[0002]
[Prior art]
Conventionally, various embankment reinforcement structures have been employed to prevent embankment collapse. In particular, an embankment reinforcement structure in which a slope reinforcement unit is arranged to maintain the shape of the slope has been adopted in recent years, since the stability of the embankment and the greening and protection of the slope can be integrated. That is, as shown in FIG. 5, the embankment is reinforced by a slope reinforcing unit 12 made of expanded metal or the like and an embankment reinforcing member 16 called geotextile. For connecting the slope reinforcing unit 12 and the embankment reinforcing member 16, a connecting member 11 as shown in FIG. 6 is used, and is fixed at a connecting portion 11 </ b> D bent in a mountain shape or a semicircle (for example, see Patent Reference 1).
[0003]
[Patent Document 1]
JP 2001-11865 A (page 4, FIG. 4)
[0004]
[Problems to be solved by the invention]
However, in the chevron connection part 11D shown in FIGS. 6A and 6B, the upper surface of the embankment reinforcement member 16 and the chevron inner surface of the connection part 11D are formed so that the embankment reinforcement member 16 does not come off. The connecting rod 17 must be inserted into the gap. On the other hand, in the semicircular connecting portion 11D shown in FIGS. 6C and 6D, the connecting rod is unnecessary, but when the embankment reinforcing member 16 is strongly pulled by the earth pressure or the like, the connecting portion 11D is There was a possibility that the semicircle opened and became linear, and the embankment reinforcing member 16 could easily come off.
[0005]
Therefore, the present invention provides a connecting member for a slope reinforcing unit that can reliably eliminate the possibility of the embankment reinforcing member coming out with a simple structure, an embankment reinforcing structure using the connecting member, and an embankment reinforcing method. It is the purpose.
[0006]
[Means for Solving the Problems]
The present invention has been made to solve the above problems, the gist of which is a hook portion with a slope reinforcing unit, a connecting portion with an embankment reinforcing member, and a main body portion therebetween, The hooking portion has a shape extending in the upward direction of the slope reinforcing unit, and the connecting portion has a shape in which the connecting portion is folded upward and has a tip reaching the main body portion. Preferably, one end of each of the plurality of vertical bars is bent into an L shape to form a hook portion, and the other ends are each bent into a circular shape to form a connection portion, and adjacent main body portions are fixed to each other by a horizontal bar. The present invention relates to a connecting member for a slope reinforcing unit.
[0007]
Also, the connection member, a slope reinforcing unit having an L-shape in side view, a tension bar for connecting and reinforcing an L-shaped vertical side portion and a bottom side portion of the slope reinforcing unit, and a mesh shape. The embankment reinforcing member according to the embankment reinforcing structure, wherein the body of the connecting member is inserted into the opening of the vertical side of the slope reinforcing unit, and the mesh of the embankment reinforcing member is inserted into the connecting portion of the connecting member. Preferably, the present invention relates to an embankment reinforcing structure in which a connecting portion of a connecting member is located inside a triangle formed by a slope reinforcing unit and a tension bar. A connecting rod may be inserted into a gap formed between the upper surface of the mesh of the embankment reinforcing member inserted into the connecting portion of the connecting member and the inner surface of the connecting portion.
[0008]
Furthermore, in the embankment reinforcement method using the above-described connecting member, after filling the earth and sand with the opening at the upper end left inside the lower slope reinforcement unit to be the lower stage, the lower end of the slope reinforcement unit to be the upper stage. The openings are installed inside the lower slope reinforcement unit, and the openings are aligned with each other. Subsequently, the hooks of the connecting member are inserted into both the openings from the inside, and the upper and lower slope reinforcement units are inserted. The present invention relates to an embankment reinforcing method for constructing an embankment by sequentially connecting slope-reinforcement units.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
In the present invention, the connecting member interconnects the slope reinforcing unit installed on the slope of the embankment and the embankment reinforcing member embedded in the embankment. Here, the slope reinforcing unit is installed on the slope of the embankment to maintain the shape of the embankment, and is connected vertically and horizontally to reinforce the embankment. The embankment reinforcing member is laid to reinforce the embankment itself, and is made of a net-like synthetic resin embedded in the embankment.
[0010]
As the connecting member, for example, one end of each of the plurality of vertical bars is bent into an L shape to form a hook. Further, the other ends are each bent upward in a circular shape so that the front ends reach the main body to form connection portions. Furthermore, the adjacent main body portions of the plurality of vertical bars are fixed to each other with a horizontal bar to form a set. The upper and lower slope reinforcing units are connected by inserting the hooks of the connecting members into the openings from the inside. That is, since the slope portion of the slope reinforcing unit is generally made of a net member, it has a plurality of openings including upper and lower ends. Therefore, the opening at the lower end of the slope reinforcing unit at the upper stage and the opening at the upper end of the slope reinforcing unit at the lower stage are matched to form one opening, and the hook of the connecting member is obliquely inserted into this opening. After inserting (reducing the substantial height of the L-shaped vertical side) and returning it to its original state, the hook will not fall out of the opening and the upper and lower slope reinforcement units will be connected. It is done.
[0011]
In addition, the hook portion not only bends one end of the vertical bar upward, but also has an L-shape in side view due to welding of another member, rotatable connection, punching, etc. Any shape may be used as long as it can be inserted into the opening of the slope reinforcing unit by folding or folding the vertical side of the character. Further, a plurality of hook portions are provided in one-to-one correspondence with the opening pitch of the opening portions or at intervals of several.
[0012]
On the other hand, the other end of the connecting member serves as a connection portion with the embankment reinforcing member. The shape of the connection portion is a shape (for example, a circular shape) that is folded upward and has a tip reaching the main body portion. Then, the mesh of the embankment reinforcing member is inserted into the connecting portion from above, and the mesh is hooked on the folded back end, so that the embankment reinforcing member is connected so as not to come off. Therefore, according to the connecting member of the present invention, when the embankment reinforcing member is strongly pulled by the earth pressure or the like, the pulling force acts in the direction in which the connection portion is folded back (in the case of a circular shape, the direction in which the diameter is reduced). Therefore, the folded portion of the connection portion does not open, and the possibility of the embankment reinforcing member falling out is reliably eliminated.
[0013]
Note that the folded back end may be hooked by the embankment reinforcing member, and does not necessarily have to be in contact with the main body. Also, in order to further secure the connection between the slope reinforcing unit and the embankment reinforcing member and prevent the embankment reinforcing member from coming off from above the connecting portion of the connecting member, the upper surface of the mesh of the embankment reinforcing member and the connecting portion are connected. The connecting rod can also be inserted into the gap formed between the inner surface of the connecting rod.
[0014]
In addition, by using the connecting member of the present invention, an embankment reinforcing structure can be easily constructed. That is, the slope reinforcing unit having an L-shape in side view is vertically connected as described above, and the embankment reinforcing member is connected, and tension is applied between the L-shaped vertical side portion and the bottom side portion of the slope reinforcing unit. They are connected by bars. Here, the reason why the tension bar is used is that the slope side reinforcing unit as a whole forms a triangle in a side view due to the tension bar, and is excellent in strength against earth pressure and the like. However, it is preferable that the connecting portion of the connecting member is located inside a triangle formed by the slope reinforcing unit and the tension bar. This is because interference between the connecting portion of the connecting member and the tension bar can be prevented without special measures.
[0015]
Here, various net members can be used as the slope reinforcing unit. In other words, welded metal nets manufactured by plating or resin coating, etc., turtle shell wire nets, rhombic wire nets, wire meshes such as expanded metal, etc. formed by connecting the intersections of wire rods in a twisted manner, or various types of gratings etc. Among the lattice members, among them, it is preferable to use an expanded metal that is bent to have an L shape in side view. This is because it is possible to easily stand alone and economically obtain a slope reinforcing unit excellent in strength. In this case, the opening into which the connecting member is inserted is a mesh located at the upper end or the lower end.
[0016]
Depending on the mesh, the slope can be greened by the slope reinforcing unit itself. However, when the mesh is large or when it is desired to green more quickly, a vegetation sheet may be provided inside. In this case, by making the vegetation sheet finer than the mesh of the slope reinforcing unit, stability of the embankment and greening and protection of the slope are integrated. In addition, it is preferable to install an embankment holding member made of a nonwoven fabric or the like inside the slope reinforcing unit.
[0017]
Next, an embankment reinforcing method using the above-described connecting member will be described. First, the slope reinforcing unit is made to stand by itself using the L-shaped bottom of the slope reinforcing unit, and soil is laminated approximately every 25 cm to 30 cm inside the slope reinforcing unit, and the soil is rolled by a vibrating roller or the like. The lower slope reinforcement unit will be installed. At this time, the soil is laminated while leaving only the opening at the upper end of the slope reinforcing unit.
[0018]
Subsequently, the upper-side slope reinforcement unit is allowed to stand on the laminated soil inside the lowermost slope-side reinforcement unit. At this time, the openings of the upper and lower slope reinforcement units are aligned. Then, the hook of the connecting member is inserted and hooked from the inside of the opening, and the upper and lower slope reinforcing units are connected. Thereafter, the embankment reinforcing member is fixed to the connection portion of the connecting member, and the embankment reinforcing member is pulled so that the hook portion of the connecting member does not loosen. Finally, the soil is laminated on the inside of the upper-side slope reinforcing unit and on the embankment reinforcing member, and the reinforced embankment is constructed by repeating the same method as described above.
[0019]
【Example】
Hereinafter, specific examples of preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an example of a connecting member for a slope reinforcing unit of the present invention. As shown in FIG. 1, the connecting member 1 is formed by welding a vertical bar 1A and a horizontal bar 1B so as to intersect with each other. One end of the vertical bar 1A is bent upward to form a hook portion 1C. The side view is L-shaped between the main body 1E. The hook 1C can be inserted into the opening of the slope reinforcing unit (not shown), and the interval between the vertical bars 1A is one-to-one corresponding to the opening of the slope reinforcing unit. . On the other hand, the other end of the vertical bar 1A is folded upward and its tip reaches the main body 1E to form a connecting portion 1D bent in a circular shape.
[0020]
FIGS. 2 and 3 are cross-sectional views showing a method of connecting the lower sloping unit 2 and the upper sloping unit 3 using the connecting member 1 of the embodiment shown in FIG. In FIG. 2, first, a lower-side slope reinforcing unit 2 in which an expanded metal is bent so as to have an L-shape in side view is self-supported on the ground 4. At the same time, the S-shaped tension bar 5 in side view is hooked between the L-shaped vertical side portion and the bottom side portion of the slope reinforcing unit 2 for reinforcement. It should be noted that three or four tension bars 5 are attached at intervals of 2 m in the width direction of the slope reinforcing unit 2.
[0021]
Next, the embankment is filled inside the slope reinforcing unit 2 while leaving the upper end opening 2A (for convenience, the embankment is not shown). After that, the slope reinforcing unit 3 is similarly made to stand on the embankment. At this time, the opening 2A of the slope reinforcing unit 2 and the opening 3A of the slope reinforcing unit 3 are matched. Note that the tension bar 5 is attached in the same manner as described above.
[0022]
Subsequently, the connecting member 1 is inclined so that the substantial height H of the hook portion 1C is lower than the opening width W of the openings 2A and 3A, and inserted as shown by the arrow. The state after insertion is as shown in FIG. That is, when the connecting member 1 is returned horizontally, the tip of the hook portion 1C is hooked on the openings 2A and 3A, and the slope reinforcing member 2 and the slope reinforcing member 3 are connected.
[0023]
In FIG. 3, one end of the embankment reinforcing member 6 is fixed to the connecting portion 1D of the connecting member 1. On the other hand, the other end of the embankment reinforcing member 6 is fixed on the embankment with an anchor (not shown). Therefore, the upper end of the hook 1C of the connecting member 1 comes into contact with the upper part of the opening 2A, and the slope reinforcing member 2 and the slope reinforcing member 3 are firmly fixed between the hook 1C and the embankment, They are connected (however, in FIG. 3, for convenience, the hook portion 1C, the slope reinforcing unit 2, and the slope reinforcing unit 3 are not abutted).
[0024]
FIG. 4 is a side view and a top view showing a state in which a mesh-like synthetic resin embankment reinforcing member 6 is fixed to the connecting member 1 of the embodiment shown in FIG. That is, as shown in FIGS. 4A and 4B, the mesh 6A of the embankment reinforcing member 6 is fitted over the connecting portion 1D of the connecting member 1 and fixed. Then, the mesh 6A is hooked on the distal end side of the circular connection portion 1D. In this state, when the embankment reinforcing member 6 is pulled by earth pressure or the like, a tensile force acts in a direction to reduce the diameter of the circular connection portion 1D. Therefore, the folded portion of the connection portion 1D does not open, and the embankment reinforcing member 6 does not come off. As shown in FIGS. 4C and 4D, the connecting rod 7 is inserted into a gap formed between the upper surface of the mesh 6A of the embankment reinforcing member 6 and the inner surface of the connecting portion 1D of the connecting member 1. The embankment reinforcing member 6 can also be prevented from falling off from above the connection portion 1D.
[0025]
In addition, as the slope reinforcement unit, in addition to the expanded metal, a metal round bar having a wire diameter of 6 mm is set at a predetermined position, the whole is welded in a grid shape, and a welding wire mesh manufactured by performing plating or resin coating. A diamond wire mesh having a wire diameter of 4.0 mm and a mesh of 100 mm (diagonal length in the horizontal direction is 160 mm), a wire mesh of a wire diameter of 4.0 mm or 3.2 mm, and a mesh of 80 mm or 100 mm may be used. it can.
[0026]
Further, as the embankment reinforcing member, a net-type sheet or the like coated with a special synthetic resin by combining polyester yarns in a lattice shape can be used. The net-type sheet has a mesh structure, so that it can be easily blended with soft ground or embankment, and can exhibit large frictional resistance by mixing the upper and lower earth and sand appropriately. Furthermore, since it has high strength, is lightweight and has weather resistance, it can save labor and cost, and is most suitable for embankment reinforcement work.
[0027]
【The invention's effect】
As described above, the connecting member for a slope reinforcing unit of the present invention includes a hook portion with the slope reinforcing unit, a connecting portion with the embankment reinforcing member, and a main body portion therebetween. The shape of the surface reinforcement unit extends in the upward direction, and the connection part is folded upward and the tip reaches the main body, making it possible to pull out the embankment reinforcement member with a simple structure. Can be reliably eliminated. In addition, by using the connecting member for a slope reinforcing unit of the present invention, an embankment reinforcing structure and an embankment reinforcing method which are simple in construction and particularly excellent in reliability can be provided.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of a connecting member for a slope reinforcing unit of the present invention.
FIG. 2 is a sectional view showing a method of connecting upper and lower slope reinforcement units using the connecting member of the embodiment shown in FIG. 1;
FIG. 3 is a cross-sectional view showing a state where upper and lower slope reinforcing units are connected using the connecting member of the embodiment shown in FIG. 1;
FIG. 4 is a side view and a top view showing a state where an embankment reinforcing member is connected to the connecting member of the embodiment shown in FIG. 1;
FIG. 5 is a perspective view showing an example of an embankment reinforcing structure.
FIG. 6 is a perspective view showing a conventional connecting member for a slope reinforcing unit.
[Explanation of symbols]
1 {Connecting Member 1A} Vertical Bar 1B {Horizontal Bar 1C} Hook 1D {Connector 1E} Body 2} Lower Slope Reinforcing Unit 2A {Opening 3} Upper Slope Reinforcing Unit 3A {Opening 4} Ground 5 ‥ tension bar 6 ‥ embankment reinforcing member 6 A ‥ mesh 7 ‥ connecting rod 11 ‥ connecting member 11 D ‥ connecting portion 12 ‥ slope reinforcing unit 16 ‥ embankment reinforcing member 16 A ‥ mesh 17 ‥ connecting rod H 実 質 substantial height of hook portion W W opening width

Claims (6)

盛土の法面に設置される法面補強ユニット(2,3)と、盛土内に埋設される盛土補強部材(6)とを相互に連結するための連結部材(1)であって、法面補強ユニット(2,3)との引掛部(1C)と、盛土補強部材(6)との接続部(1D)と、その間の本体部(1E)とからなり、引掛部(1C)が、法面補強ユニット(2,3)の上方向に伸びる形状となっており、接続部(1D)が、上方向に折り返されて先端が本体部(1E)まで達する形状となっていることを特徴とする法面補強ユニット用連結部材。A connecting member (1) for interconnecting a slope reinforcing unit (2, 3) installed on a slope of an embankment and an embankment reinforcing member (6) embedded in the embankment, the slope being a slope. A hook portion (1C) with the reinforcing units (2, 3), a connection portion (1D) with the embankment reinforcing member (6), and a main body portion (1E) therebetween, and the hook portion (1C) The surface reinforcing unit (2, 3) has a shape extending upward, and the connecting portion (1D) is folded upward and has a shape whose tip reaches the main body portion (1E). Connecting member for slope reinforcement unit. 複数の縦棒(1A)の一端をそれぞれL字状に折り曲げて引掛部(1C)とすると共に、他端をそれぞれ円状に折り曲げて接続部(1D)とし、隣り合う本体部(1E)同士を横棒(1B)で固定したことを特徴とする請求項1に記載の法面補強ユニット用連結部材。One end of each of the plurality of vertical bars (1A) is bent into an L-shape to form a hook portion (1C), and the other ends are each bent into a circular shape to form a connection portion (1D), and adjacent main body portions (1E) are connected to each other. The connecting member for a side surface reinforcing unit according to claim 1, wherein is fixed by a horizontal bar (1B). 請求項1又は2に記載の連結部材(1)と、側面視がL字状の法面補強ユニット(2,3)と、法面補強ユニット(2,3)のL字状の縦辺部と底辺部との間を連結し補強するテンションバー(5)と、網目状の盛土補強部材(6)とからなり、法面補強ユニット(2,3)の縦辺部の開口部(2A,3A)に連結部材の本体部(1E)が挿入され、連結部材の接続部(1D)に盛土補強部材(6)の網目(6A)が挿入されていることを特徴とする盛土補強構造。The connecting member (1) according to claim 1 or 2, a side surface reinforcing unit (2, 3) having an L-shaped side view, and an L-shaped vertical side portion of the side surface reinforcing unit (2, 3). Bar (5) which connects and reinforces between the base and the bottom, and a mesh-like embankment reinforcing member (6), and has openings (2A, 3A) The embankment reinforcing structure wherein the main body (1E) of the connecting member is inserted into the connecting member, and the mesh (6A) of the embankment reinforcing member (6) is inserted into the connecting portion (1D) of the connecting member. 連結部材の接続部(1D)が、法面補強ユニット(2,3)とテンションバー(5)とで構成される三角形の内側に位置することを特徴とする請求項3に記載の盛土補強構造。The embankment reinforcing structure according to claim 3, wherein the connecting portion (1D) of the connecting member is located inside a triangle formed by the slope reinforcing units (2, 3) and the tension bar (5). . 連結部材の接続部(1D)に挿入された盛土補強部材(6)の網目(6A)の上面と、接続部(1D)の内面とでできた隙間に、連結棒(7)が差し込まれていることを特徴とする請求項3又は4に記載の盛土補強構造。The connecting rod (7) is inserted into a gap formed between the upper surface of the mesh (6A) of the embankment reinforcing member (6) inserted into the connecting portion (1D) of the connecting member and the inner surface of the connecting portion (1D). The embankment reinforcing structure according to claim 3 or 4, wherein the embankment reinforcing structure is provided. 請求項1又は2に記載の連結部材(1)を用いた盛土補強工法であって、下段となる法面補強ユニット(2)の内側に、上端の開口部(2A)を残して土砂を盛った後、上段となる法面補強ユニット(3)の下端の開口部(3A)を、下段の法面補強ユニット(2)の内側で、かつ、開口部(2A,3A)同士を一致させて設置し、続いて、内側から連結部材(1)の引掛部(1C)を両開口部(2A,3A)に挿入して上下の法面補強ユニット(2,3)を連結することで、順次法面補強ユニット(2,3)を重ね合わせて盛土を構築することを特徴とする盛土補強工法。An embankment reinforcing method using the connecting member (1) according to claim 1 or 2, wherein earth and sand are piled up inside a lower surface slope reinforcing unit (2), leaving an opening (2A) at an upper end. After that, the opening (3A) at the lower end of the upper side slope reinforcing unit (3) is aligned with the opening (2A, 3A) inside the lower side slope reinforcing unit (2). It installs, and subsequently, the hook part (1C) of the connection member (1) is inserted into both opening parts (2A, 3A) from the inside, and the upper and lower slope-reinforcement units (2, 3) are connected. An embankment reinforcement method characterized by constructing an embankment by stacking the slope reinforcement units (2, 3).
JP2003000213A 2003-01-06 2003-01-06 Connecting member for slope face reinforcing unit, banking reinforcing structure and banking reinforcing construction method using this connecting member Pending JP2004211426A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009174280A (en) * 2008-01-28 2009-08-06 Hajime Matsuoka Earth retaining structure and construction method of earth retaining structure
JP2015036480A (en) * 2013-08-12 2015-02-23 太陽工業株式会社 Box-shaped sandbag, box-shaped sandbag set, and method for constructing structure by using box-shaped sandbag

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009174280A (en) * 2008-01-28 2009-08-06 Hajime Matsuoka Earth retaining structure and construction method of earth retaining structure
JP2015036480A (en) * 2013-08-12 2015-02-23 太陽工業株式会社 Box-shaped sandbag, box-shaped sandbag set, and method for constructing structure by using box-shaped sandbag

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