JP5500903B2 - Retaining wall and how to construct a retaining wall - Google Patents
Retaining wall and how to construct a retaining wall Download PDFInfo
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Description
本発明は、道路周辺、公園、運動場、宅地等の切土又は盛土等の法面や、河川、湖沼、用水等の水辺の堤防等の法面等の各種法面における土砂の崩落を防止する箱型擁壁に関するものである。 The present invention prevents the collapse of earth and sand on various slopes such as slopes such as cuts or embankments of roads, parks, playgrounds, residential areas, etc., and slopes of riversides, lakes, watersides, etc. It relates to a box-type retaining wall.
以前より箱型擁壁と呼ばれる擁壁がよく知られている。箱型擁壁とは、底のない箱状のコンクリートブロック（以下、「箱型ブロック」という。）に栗石、砕石、鉱滓などの粗粒状充填材を充填したもの（以下、箱型ブロックに充填材を充填したものを「箱型構造体」という。）を横方向（擁壁の施工延長方向）に並べながら階段状に積み上げて構築された擁壁である。 Retaining walls called box-type retaining walls are well known. A box-type retaining wall is a box-shaped concrete block with no bottom (hereinafter referred to as a “box-type block”) filled with coarse granular filler such as chestnut, crushed stone, or slag (hereinafter referred to as a box-type block). This is a retaining wall constructed by stacking materials in a staircase while arranging them in a horizontal direction (the direction in which the retaining wall is extended).
箱型擁壁に用いられる箱型ブロックは、中が空洞であり１つ１つが軽いため、従来利用されているコンクリートブロック（大型ブロック、間知ブロックなど）と比較して施工が容易である。また上下左右に設置された箱型構造体同士はセメントやモルタルなどで一体化させるような接合を行なわず、金具などの接合材を用いない柔な構造であるために、コンクリートブロック擁壁などの一体型の剛な擁壁のように背後からの土圧による壁面への応力集中が起きることがなく、地震などに強いという特性がある。 Since the box-type block used for the box-type retaining wall is hollow inside and light one by one, it is easy to construct as compared with conventionally used concrete blocks (large block, knowledge block, etc.). In addition, the box-type structures installed on the top, bottom, left and right do not perform joints such as cement or mortar, and do not use joint materials such as metal fittings. Unlike an integrated rigid retaining wall, there is no stress concentration on the wall surface due to earth pressure from behind, and it is resistant to earthquakes.
一方、箱型擁壁は、大雨や湧水、鉄砲水などの不測の事態が起きた際に箱型擁壁の基礎を構成する粗粒状基礎材が動き、基礎が変位する恐れがあった。この基礎の変位という問題に対して、特許文献１では、最下段の箱型構造体の下にジオグリッドで粗粒状基礎材を巻き込んだ基礎（以下、「ジオグリッド籠基礎」という。）を設けることを提案している。 On the other hand, in the case of a box-type retaining wall, when an unexpected situation such as heavy rain, spring water, flash flood, etc. occurs, the coarse granular foundation material that forms the foundation of the box-type retaining wall may move and the foundation may be displaced. With respect to the problem of the displacement of the foundation, in Patent Document 1, a foundation (hereinafter, referred to as “geogrid ridge foundation”) in which a coarse granular foundation material is wound with a geogrid is provided below the lowermost box-type structure. Propose that.
ジオグリッド籠基礎を用いると、箱型擁壁の基礎変位の防止工としてある程度の効果があった。しかし、ジオグリッド籠基礎を設置するには、現場において粗粒状基礎材をジオグリッドで巻き込む工程やジオグリッド同士の結束作業などを手作業で行わなければならず手間がかかる。また、粗粒材をジオグリッドで巻き込む作業には、ジオグリッド籠基礎の敷設幅と同程度の幅の作業ヤードを用意しなければならず、ジオグリッド籠基礎の設置幅以上の余掘りが必要である。 The use of Geogrid 籠 foundation had a certain effect as a work to prevent the foundation displacement of the box-type retaining wall. However, in order to install the geogrid dredging foundation, it is necessary to manually perform the process of winding the coarse granular base material with the geogrid and bundling work between the geogrids at the site. In addition, in order to wind coarse particles with geogrid, a work yard with a width that is about the same as the width of the geogrid 用意 foundation must be prepared, and more than the installation width of the geogrid 籠 foundation is required. It is.
一方、ジオグリッド籠基礎は、ジオグリッドで外周から粗粒系基礎材を巻き込むことにより粗粒系基礎材を拘束し、せん断力抵抗力を軽減できるという効果があった。しかし、箱型擁壁の擁壁高を高くすればするほど粗粒基礎材にかかるせん断力が大きくなり、ジオグリッドによる外周からの粗粒基礎材への拘束力だけでは十分にそのせん断力に対して抵抗できない恐れがあった。従って、本技術分野においては、より大きなせん断力に対抗できる箱型擁壁の基礎を開発することが要請されていた。 On the other hand, the Geogrid 籠 foundation has the effect of restraining the coarse grain base material by entraining the coarse grain base material from the outer periphery with the Geogrid and reducing the shear force resistance. However, the higher the retaining wall height of the box-type retaining wall, the greater the shearing force applied to the coarse-grained foundation material. There was a fear that he could not resist. Therefore, in this technical field, it has been required to develop a box-type retaining wall foundation capable of resisting a greater shear force.
以上より、本発明の第１の目的は、従来よりも簡単にかつ広い作業ヤード必要とせずに施工できる箱型擁壁の基礎及びその施工方法を提供することである。また第２の目的は、大きなせん断力に対抗できる安定した箱型擁壁の基礎及びその施工方法を提供することである。 As described above, the first object of the present invention is to provide a box-type retaining wall foundation that can be constructed more easily and without the need for a wider work yard, and a construction method therefor. A second object is to provide a stable box-type retaining wall foundation capable of resisting a large shear force and a construction method thereof.
本発明は、前記課題を解決するため、以下の手段を採用した。
すなわち本発明は、箱型擁壁基礎の床付け面にジオグリッドを敷設し、さらにその上にハニカム状立体補強材を展帳し粗粒系基礎材を充填したハニカム構造体を設置すること（以下、「ハニカム基礎」という。）をその要旨とする。
The present invention employs the following means in order to solve the above problems.
That is, the present invention is to install a geogrid on the flooring surface of a box-type retaining wall foundation, and further install a honeycomb structure filled with a coarse-grained foundation material on which a honeycomb-like three-dimensional reinforcing material is extended ( The gist is hereinafter referred to as “honeycomb foundation”.
請求項１記載の発明は、
起立した表面板と、該表面板より奥へ離間して起立した控板と、該表面板の左右方向途中部と該控板の左右方向途中部とを連結する繋ぎ板とを含む箱型ブロックを、
前記表面板と控板との間の空所に粗粒状材料を充填しつつ、左右に並べるとともに上下に複数段に積んで構築される擁壁において、
最下段の前記箱型ブロックの下に、多数のセルからなるハニカム構造をしたハニカム状立体補強材に粗粒状材料を充填したハニカム構造体からなる基礎を設け、
かつ、前記最下段箱型ブロックとハニカム構造体との間にジオグリッドを敷設せず、
かつ、前記ハニカム構造体の下にジオグリッドを具備することを特徴とする擁壁である。
The invention described in claim 1
A box-type block including an upstanding surface plate, a holding plate that stands up away from the surface plate, and a connecting plate that connects a middle portion in the left-right direction of the surface plate and a middle portion in the left-right direction of the holding plate The
In the retaining wall constructed by filling the space between the face plate and the holding plate with the coarse granular material , arranged in the left and right and stacked in multiple stages up and down,
Under the lowermost box-shaped block, a foundation made of a honeycomb structure in which a honeycomb-shaped three-dimensional reinforcing material having a honeycomb structure consisting of a large number of cells is filled with a coarse granular material is provided,
And without laying a geogrid between the lowermost box block and the honeycomb structure,
And it is a retaining wall characterized by comprising a geogrid under the said honeycomb structure .
ハニカム構造体は、上載される箱型擁壁の荷重に起因するせん断力をハニカム構造体が構成する各セルの拘束効果によって均等に分散させ、ハニカム基礎の横方向への変位を抑える効果を奏す。また、該ハニカム構造体の下に敷設されたジオグリッドは、ジオグリッドに付与される平面方向への引っ張り力に起因するハンモック効果により下地盤への力の伝達を均一にする。 The honeycomb structure has the effect of suppressing the lateral displacement of the honeycomb foundation by evenly distributing the shear force caused by the load of the box-type retaining wall mounted thereon by the restraining effect of each cell constituting the honeycomb structure. . In addition, the geogrid laid under the honeycomb structure makes the transmission of force to the base plate uniform due to the hammock effect caused by the tensile force in the planar direction applied to the geogrid.
請求項２記載の発明は、
起立した表面板と、該表面板より奥へ離間して起立した控板と、該表面板の左右方向途中部と該控板の左右方向途中部とを連結する繋ぎ板とを含む箱型ブロックを、
前記表面板と控板との間の空所に粗粒状材料を充填しつつ、左右に並べるとともに上下に複数段に積んで構築される擁壁の基礎構築方法であって、
擁壁基礎の床付範囲にジオグリッドを設置する工程と、
該ジオグリッドの上に多数のセルからなるハニカム構造をしたハニカム状立体補強材を展帳して設置する工程と、
該ハニカム状立体補強材に粗粒状材料を充填してハニカム構造体を作製する工程と、
前記ハニカム構造体の上にジオグリッドを敷設しないで前記擁壁を構築する工程と、からなる擁壁の基礎構築方法である。
The invention according to claim 2
A box-type block including an upstanding surface plate, a holding plate that stands up away from the surface plate, and a connecting plate that connects a middle portion in the left-right direction of the surface plate and a middle portion in the left-right direction of the holding plate The
It is a foundation construction method of a retaining wall that is constructed by filling the space between the surface plate and the holding plate with a coarse granular material and arranging them in the left and right and stacking up and down in a plurality of stages.
Installing a geogrid in the flooring area of the retaining wall foundation;
A step of installing and installing a honeycomb-shaped three-dimensional reinforcing material having a honeycomb structure composed of a large number of cells on the geogrid;
Filling the honeycomb-shaped three-dimensional reinforcing material with a coarse granular material to produce a honeycomb structure; and
A method for constructing a retaining wall, comprising the step of constructing the retaining wall without laying a geogrid on the honeycomb structure .
本発明を利用することにより、従来のジオグリッド籠基礎よりも簡単にかつ作業ヤードのための余掘りの必要のない箱型擁壁の基礎を施工することができる。本発明のせん断力に対してより強い抵抗を持つ箱型擁壁の基礎を用いることで、より安定な箱型擁壁を構築できる。 By utilizing the present invention, it is possible to construct a foundation for a box-type retaining wall that is simpler than a conventional geogrid fence foundation and does not require extra digging for a work yard. A more stable box-type retaining wall can be constructed by using the foundation of the box-type retaining wall having a stronger resistance to the shearing force of the present invention.
以下、本発明の実施形態について図面を用いて説明する。なお、本実施形態は、本発明を実施するための一形態に過ぎず、本発明は本実施形態によって限定されるものではなく、本発明の要旨を逸脱しない範囲で種々の変更実施の形態が可能である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that this embodiment is merely an embodiment for carrying out the present invention, and the present invention is not limited by this embodiment, and various modified embodiments can be made without departing from the gist of the present invention. Is possible.
本発明は、
起立した表面板と、該表面板より奥へ離間して起立した控板と、該表面板の左右方向途中部と該控板の左右方向途中部とを連結する繋ぎ板とを含む箱型ブロックを、
前記表面板と控板との間の空所に粗粒状材料を充填しつつ、左右に並べるとともに上下に複数段に積んで構築される擁壁において、
最下段の前記箱型ブロックの下に、多数のセルからなるハニカム構造をしたハニカム状立体補強材に粗粒状材料を充填したハニカム構造体からなる基礎を設け、
かつ、前記最下段箱型ブロックとハニカム構造体との間にジオグリッドを敷設せず、
かつ、前記ハニカム構造体の下にジオグリッドを具備することを特徴とする擁壁である。
The present invention
A box-type block including an upstanding surface plate, a holding plate that stands up away from the surface plate, and a connecting plate that connects a middle portion in the left-right direction of the surface plate and a middle portion in the left-right direction of the holding plate The
In the retaining wall constructed by filling the space between the face plate and the holding plate with the coarse granular material , arranged in the left and right and stacked in multiple stages up and down,
Under the lowermost box-shaped block, a foundation made of a honeycomb structure in which a honeycomb-shaped three-dimensional reinforcing material having a honeycomb structure consisting of a large number of cells is filled with a coarse granular material is provided,
And without laying a geogrid between the lowermost box block and the honeycomb structure,
And it is a retaining wall characterized by comprising a geogrid under the said honeycomb structure .
図１は、本発明に用いる箱型ブロックの斜視図である。図２は、本発明に用いる箱型ブロックの三面図である。 FIG. 1 is a perspective view of a box-type block used in the present invention. FIG. 2 is a three-sided view of a box-type block used in the present invention.
箱型ブロックは、擁壁の壁面部を構成する表面板１、表面板と相対する位置にある控え板２、表面板１と控え板２とを繋ぐ２枚の繋ぎ板３から構成される。控え板２の高さは表面板１の半分程度である。表面板１と控え板２と２枚の繋ぎ板３に囲まれる部分は内空部４があり、内空部４は筒状で上下に貫通している。箱型ブロックは、設置したい位置に静置後、内空部４、側空部５を含む箱型ブロックの表面板の背面に充填材を充填して箱型構造体を形成する。 The box block is composed of a surface plate 1 constituting a wall surface portion of the retaining wall, a retaining plate 2 at a position facing the surface plate, and two connecting plates 3 that connect the surface plate 1 and the retaining plate 2. The height of the backing plate 2 is about half that of the surface plate 1. A portion surrounded by the surface plate 1, the retainer plate 2, and the two connecting plates 3 has an inner space portion 4, and the inner space portion 4 is cylindrical and penetrates vertically. The box-type block is left at a position where it is desired to be installed, and a box-type structure is formed by filling the back of the surface plate of the box-type block including the inner space 4 and the side space 5 with a filler.
前記の箱型構造体の上に、小段を設けながら新たな箱型ブロックを載置する。設置された新たな箱型ブロックに前述と同様、充填材を充填する。このような作業を繰り返しながら、箱型構造体を積み重ねることで階段状の擁壁を構築する。擁壁の施工延長に応じて、箱型ブロックは施工延長方向に一列に配置されて擁壁が構築される。 A new box-shaped block is placed on the box-shaped structure while providing small steps. A new box-shaped block is filled with a filler as described above. While repeating such operations, step-shaped retaining walls are constructed by stacking box-shaped structures. According to the construction extension of the retaining wall, the box blocks are arranged in a row in the construction extension direction to construct the retaining wall.
箱型ブロックに充填される充填材は、排水性のよい粗粒状材料が好適である。粗粒状材料としては単粒度砕石、栗石、コンクリートガラなどが挙げられる。 The filler filled in the box block is preferably a coarse granular material with good drainage. Examples of the coarse granular material include single grain crushed stone, chestnut stone, and concrete glass.
図３は、本発明に用いるハニカム状立体補強材の展張前の斜視図である。ハニカム状立体補強材は、板状や網状の高分子材料からなるストリップ材をハニカム構造にしたジオシンセティックで、このハニカム状立体補強材に充填材を充填してハニカム構造体を構築する。 FIG. 3 is a perspective view of the honeycomb-shaped three-dimensional reinforcing material used in the present invention before expansion. The honeycomb-shaped three-dimensional reinforcing material is a geosynthetic in which a strip material made of a plate-like or net-like polymer material has a honeycomb structure, and this honeycomb-shaped three-dimensional reinforcing material is filled with a filler to construct a honeycomb structure.
ハニカム状立体補強材６は、複数枚の高密度ポリエチレンのストリップ材７を一定間隔の結合部位９にて結合したものである。このハニカム状立体補強材６は展張方向１０に展張してハニカム状のセル構造を形成する。 The honeycomb-shaped three-dimensional reinforcing material 6 is obtained by bonding a plurality of high-density polyethylene strip materials 7 at bonding sites 9 at regular intervals. The honeycomb-shaped three-dimensional reinforcing material 6 is stretched in the stretching direction 10 to form a honeycomb-shaped cell structure.
ハニカム状立体補強材６のストリップ材７には排水性を向上させるために孔８を設ける。孔の大きさや形状はどのようなものでもよいが、特に大きさが１ｃｍ程度の円形のものがよい。さらに孔の数は多い方が良いが、多すぎるとストリップ材の強度が低下するため、ストリップ材の面積の４０％を越えない程度の数がよい。また孔の配置は直列でも千鳥配置でもよい。 Holes 8 are provided in the strip material 7 of the honeycomb-shaped three-dimensional reinforcing material 6 in order to improve drainage. The hole may have any size or shape, but a circular shape having a size of about 1 cm is particularly preferable. Furthermore, it is better that the number of holes is large, but if the number is too large, the strength of the strip material is lowered, so that the number should not exceed 40% of the area of the strip material. Further, the holes may be arranged in series or in a staggered manner.
図４は、本発明に用いるハニカム状立体補強材を展張した際の斜視図である。ハニカム状立体補強材６を展張すると、ハニカム状のセル１１が形成される。セル１１内に充填材１２を充填して締め固めを行うと、剛性のあるハニカム構造体１３が形成される。 FIG. 4 is a perspective view when the honeycomb-shaped three-dimensional reinforcing material used in the present invention is stretched. When the honeycomb-shaped three-dimensional reinforcing material 6 is stretched, honeycomb-shaped cells 11 are formed. When the cells 11 are filled with the filler 12 and compacted, a rigid honeycomb structure 13 is formed.
ハニカム状立体補強材に充填される充填材は、排水性のよい粗粒状材料が好適である。粗粒状材料としては単粒度砕石、栗石、コンクリートガラなどが挙げられる。 The filler filled in the honeycomb three-dimensional reinforcing material is preferably a coarse granular material with good drainage. Examples of the coarse granular material include single grain crushed stone, chestnut stone, and concrete glass.
本発明に使用するジオグリッドは、ジオテキスタイルの一種であり、引張抵抗性のある構成要素が連結した規則的な格子構造からなるシート状のもので、主に高分子材料からなる製品である。 The geogrid used in the present invention is a kind of geotextile, and is a sheet-like product having a regular lattice structure in which constituent elements having tensile resistance are connected, and is a product mainly made of a polymer material.
とりわけ好適なジオグリッドとしては、高剛性、高強度で、耐候性、耐水性、耐薬品性、軽量性、施工性等に優れたものがよい。このような観点から、延伸処理を施されたプラスチック製網状体の使用が好ましく、とりわけカーボンブラックなどの充填剤を配合したポリエチレンやポリプロピレンなどのポリオレフィンから孔開きシートを作製し、これを一軸又は二軸に延伸して製造される網状体を使用するのが好ましい。 Particularly suitable geogrids are those having high rigidity, high strength, and excellent weather resistance, water resistance, chemical resistance, light weight, workability, and the like. From such a point of view, it is preferable to use a stretched plastic network. Particularly, a perforated sheet is produced from a polyolefin such as polyethylene or polypropylene containing a filler such as carbon black, and this is uniaxial or biaxial. It is preferable to use a network produced by stretching on the shaft.
以下、本発明のハニカム基礎を具備した箱型擁壁の設置手順の一例を、順を追って説明する。 Hereinafter, an example of the installation procedure of the box-type retaining wall provided with the honeycomb foundation of the present invention will be described step by step.
まず箱型擁壁の設置個所の床付け面を設ける。床付け面は、設置するハニカム構造体の高さ分と箱型擁壁の根入れ分の深さを加味した深さに、箱型擁壁の施工延長分、設ける。本実施形態では、根入れを設けない場合の例を示す。 First, a flooring surface is provided at the location where the box-type retaining wall is installed. The flooring surface is provided for the extension of the box-type retaining wall to a depth that takes into account the height of the honeycomb structure to be installed and the depth of the box-type retaining wall. In this embodiment, an example in the case of not providing a rooting is shown.
図５は、本発明の箱型擁壁の基礎部分にジオグリッドを設置する際の斜視図である。図５のように、前記床付け面にジオグリッド１３を施工延長２０の範囲に敷設する。 FIG. 5 is a perspective view when a geogrid is installed on the foundation portion of the box-type retaining wall of the present invention. As shown in FIG. 5, the geogrid 13 is laid in the range of the construction extension 20 on the flooring surface.
図６は、本発明のジオグリッドの上にハニカム状立体補強材を展帳しながら設置する際の斜視図である。図６のように、前記の床付け面に設置したジオグリッドの上にハニカム状立体補強材６を展張して設置する。設置したハニカム状立体補強材に充填材を充填してハニカム構造体を構築する。 FIG. 6 is a perspective view when the honeycomb-shaped three-dimensional reinforcing material is installed on the geogrid of the present invention while extending. As shown in FIG. 6, the honeycomb-shaped three-dimensional reinforcing material 6 is extended and installed on the geogrid installed on the flooring surface. A honeycomb structure is constructed by filling the installed honeycomb three-dimensional reinforcing material with a filler.
図７は、本発明のハニカム構造体の上に箱型ブロックを設置した際の斜視図である。前記のように設置されたハニカム構造体１４の上に、箱型ブロック１５を設置する。箱型ブロックはハニカム構造体と同様に、擁壁の施工延長分だけ施工延長方向２０に一列に並べて設置する。 FIG. 7 is a perspective view when a box-type block is installed on the honeycomb structure of the present invention. A box block 15 is placed on the honeycomb structure 14 placed as described above. Similarly to the honeycomb structure, the box blocks are arranged in a line in the construction extension direction 20 by the construction extension of the retaining wall.
図８は、本発明の箱型擁壁の１段目の箱型ブロックを設置後、２段目の箱型ブロックを設置する際の斜視図である。１段目の箱型ブロックを設置後、１段目の箱型ブロック及び箱型ブロックの地山側に充填材を充填し、１段目を構築する。さらに、1段目を構築後に、２段目を構成する箱型ブロックを設置する。このような工程を計画擁壁高まで繰り返して、箱型擁壁を構築する。 FIG. 8 is a perspective view when the second-stage box block is installed after the first-stage box block of the box-type retaining wall of the present invention is installed. After installing the first-stage box-type block, the first-stage box-type block and the ground side of the box-type block are filled with a filler, and the first-stage box-type block is constructed. In addition, after building the first stage, the box-type block that constitutes the second stage will be installed. A box-type retaining wall is constructed by repeating such processes up to the planned retaining wall height.
図９は、本発明の箱型擁壁が完成した際の断面図である。 FIG. 9 is a cross-sectional view when the box-type retaining wall of the present invention is completed.
図１０は本発明のハニカム基礎を用いた場合、床付け位置にハニカム状立体補強材を設置する際の断面図である。図１１は、従来のジオグリッド籠基礎を用いた場合、床付け位置にジオグリッドを設置する際の断面図である。 FIG. 10 is a cross-sectional view when the honeycomb-shaped three-dimensional reinforcing material is installed at the flooring position when the honeycomb foundation of the present invention is used. FIG. 11 is a cross-sectional view when a geogrid is installed at a flooring position when a conventional geogrid fence foundation is used.
本発明のハニカム基礎の場合には、図１０のように、ハニカム状立体補強材１４を上から展帳しながらはめ込むだけであるため、ハニカム基礎を敷設する範囲だけ掘削すれば良く、現場の施工負担を軽減できる。一方、従来のジオグリッド籠基礎の場合には、図１１のように、ジオグリッド１３を床付け面に設置した後に、該床付け面に粗粒状基礎材を投入し、該粗粒状基礎材を該ジオグリッド１３でくるむ作業を現場にて行わなければならないため、現場での施工負担が大きく、また敷設範囲の他に作業ヤードを確保しなければならない。 In the case of the honeycomb foundation of the present invention, as shown in FIG. 10, since the honeycomb-shaped three-dimensional reinforcing material 14 is only inserted while being expanded from the top, it is only necessary to excavate the area where the honeycomb foundation is laid, The burden can be reduced. On the other hand, in the case of a conventional geogrid culvert foundation, as shown in FIG. 11, after the geogrid 13 is installed on the flooring surface, the coarse granular foundation material is thrown into the flooring surface, Since the work of wrapping with the geogrid 13 must be performed at the site, the construction burden on the site is large, and a work yard must be secured in addition to the laying range.
図１２は、本発明のハニカム基礎を用いた場合、ハニカム基礎内での荷重分散を模式的に示した断面図である。図１３は、従来のジオグリッド籠基礎を用いた場合、ジオグリッド籠基礎内での荷重分散を模式的に示した断面図である。 FIG. 12 is a cross-sectional view schematically showing load distribution in the honeycomb foundation when the honeycomb foundation of the present invention is used. FIG. 13 is a cross-sectional view schematically showing the load distribution in the geogrid fence foundation when a conventional geogrid fence foundation is used.
本発明のハニカム基礎の場合には、図１２のように、箱型擁壁の荷重がハニカム構造体を構成する各セルの拘束効果によってせん断力を均等に分散することができ、横方向への変位を抑えることができる。さらに、該ハニカム構造体の下に敷設されたジオグリッドによるハンモック効果で、下地盤への力の伝達を均一にすることができ、より安定性の高い基礎となりうる。 In the case of the honeycomb base of the present invention, as shown in FIG. 12, the load of the box-type retaining wall can uniformly distribute the shearing force by the restraining effect of each cell constituting the honeycomb structure, Displacement can be suppressed. Furthermore, the hammock effect by the geogrid laid under the honeycomb structure can make force transmission to the base plate uniform, and can be a more stable basis.
一方、従来のジオグリッド籠基礎の場合には、ある程度の拘束効果とハンモック効果は期待できるが、ハニカム基礎ほどの安定性は見込めない。 On the other hand, in the case of the conventional geogrid foundation, a certain degree of restraint effect and hammock effect can be expected, but the stability as the honeycomb foundation cannot be expected.
本発明のハニカム構造体と箱型構造体からなる箱型擁壁を利用することで、従来に比較して簡単に安定性のよい擁壁を構築できる。 By using the box-type retaining wall comprising the honeycomb structure and the box-shaped structure of the present invention, it is possible to easily construct a retaining wall having better stability than conventional ones.
１ 表面板
２ 控え板
３ 繁ぎ板
４ 内空部
５ 側空部
６ ハニカム状立体補強材
７ ストリップ材
８ 孔
９ 結合部位
１０ 展張方向
１１ セル
１２ 充填材
１３ ジオグリッド
１４ ハニカム構造体
１５ 箱型ブロック
２０ 施工延長方向
DESCRIPTION OF SYMBOLS 1 Surface plate 2 Retaining plate 3 Spreading plate 4 Inner space portion 5 Side space portion 6 Honeycomb solid reinforcing material 7 Strip material 8 Hole 9 Bonding part 10 Stretching direction 11 Cell 12 Filler 13 Geogrid 14 Honeycomb structure 15 Box type Block 20 Construction extension direction
Claims (2)
前記表面板と控板との間の空所に粗粒状材料を充填しつつ、左右に並べるとともに上下に複数段に積んで構築される擁壁において、
最下段の前記箱型ブロックの下に、多数のセルからなるハニカム構造をしたハニカム状立体補強材に粗粒状材料を充填したハニカム構造体からなる基礎を設け、
かつ、前記最下段箱型ブロックとハニカム構造体との間にジオグリッドを敷設せず、
かつ、前記ハニカム構造体の下にジオグリッドを具備することを特徴とする擁壁。 A box-type block including an upstanding surface plate, a holding plate that stands up away from the surface plate, and a connecting plate that connects a middle portion in the left-right direction of the surface plate and a middle portion in the left-right direction of the holding plate The
In the retaining wall constructed by filling the space between the face plate and the holding plate with the coarse granular material , arranged in the left and right and stacked in multiple stages up and down,
Under the lowermost box-shaped block, a foundation made of a honeycomb structure in which a honeycomb-shaped three-dimensional reinforcing material having a honeycomb structure consisting of a large number of cells is filled with a coarse granular material is provided,
And without laying a geogrid between the lowermost box block and the honeycomb structure,
A retaining wall comprising a geogrid under the honeycomb structure .
前記表面板と控板との間の空所に粗粒状材料を充填しつつ、左右に並べるとともに上下に複数段に積んで構築される擁壁の基礎構築方法であって、
擁壁基礎の床付範囲にジオグリッドを設置する工程と、
該ジオグリッドの上に多数のセルからなるハニカム構造をしたハニカム状立体補強材を展帳して設置する工程と、
該ハニカム状立体補強材に粗粒状材料を充填してハニカム構造体を作製する工程と、
前記ハニカム構造体の上にジオグリッドを敷設しないで前記擁壁を構築する工程と、からなる擁壁の基礎構築方法。 A box-type block including an upstanding surface plate, a holding plate that stands up away from the surface plate, and a connecting plate that connects a middle portion in the left-right direction of the surface plate and a middle portion in the left-right direction of the holding plate The
It is a foundation construction method of a retaining wall that is constructed by filling the space between the surface plate and the holding plate with a coarse granular material and arranging them in the left and right and stacking up and down in a plurality of stages.
Installing a geogrid in the flooring area of the retaining wall foundation;
A step of installing and installing a honeycomb-shaped three-dimensional reinforcing material having a honeycomb structure composed of a large number of cells on the geogrid;
Filling the honeycomb-shaped three-dimensional reinforcing material with a coarse granular material to produce a honeycomb structure; and
A retaining wall foundation construction method comprising: constructing the retaining wall without laying a geogrid on the honeycomb structure .
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| KR101870086B1 (en) * | 2017-09-25 | 2018-06-21 | 주식회사 지오셀코리아 | slope construction method using geo cell |
| CN114277632B (en) * | 2021-11-29 | 2022-12-20 | 中铁第六勘察设计院集团有限公司 | Roadbed structure based on waste plastic bucket and construction method |
| CN114457818A (en) * | 2022-02-16 | 2022-05-10 | 哈尔滨工业大学 | Construction method of double-wall retaining wall-injection type vacuum anchor cable cooperative slope protection system |
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