JPS637421A - Construction of soil structure - Google Patents

Construction of soil structure

Info

Publication number
JPS637421A
JPS637421A JP14962186A JP14962186A JPS637421A JP S637421 A JPS637421 A JP S637421A JP 14962186 A JP14962186 A JP 14962186A JP 14962186 A JP14962186 A JP 14962186A JP S637421 A JPS637421 A JP S637421A
Authority
JP
Japan
Prior art keywords
geotextile
soil
block
earth
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
Application number
JP14962186A
Other languages
Japanese (ja)
Other versions
JPH0321686B2 (en
Inventor
Shunsuke Shimada
俊介 島田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyokado Engineering Co Ltd
Original Assignee
Kyokado Engineering Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kyokado Engineering Co Ltd filed Critical Kyokado Engineering Co Ltd
Priority to JP14962186A priority Critical patent/JPS637421A/en
Publication of JPS637421A publication Critical patent/JPS637421A/en
Publication of JPH0321686B2 publication Critical patent/JPH0321686B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)

Abstract

PURPOSE:To construct a strong soil structure having excellent workability by a method in which, geotextiles having an expandible synthetic resin block on their ends are laid on the ground, and soil is spread over the textiles and compacted in a repeating manner. CONSTITUTION:A water-permeable geotextile 1 of polyethylene sheet is laid on the ground A, an expanded styrol block 2 is placed on the geotextile 1, and one end of the geotextile 1 is folded into the block 2. Soil 3 is spread over the block 2 and compacted to form a soil layer 4. These processes are repeated, and the soil layers 4 are laminated in such a way as to extend the ends of the geotextiles 1 in lapped formed in vertical or slant directions to construct the soil structure D. The soil structure D which can be stably and strongly constructed even on soft ground can thus be obtained.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は盛土や擁壁等の土構造物の構築方法に係り、
特に施工性に優れ、かつ軟弱な地盤上でも安定で強固に
構築し得る土構造物の構築方法に関する。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for constructing earth structures such as embankments and retaining walls.
In particular, the present invention relates to a method for constructing an earth structure that has excellent workability and can be constructed stably and firmly even on soft ground.

〔従来の技術〕[Conventional technology]

盛土や擁壁等の土構造物の構築方法として、従来、次の
方法が知らている。
The following methods are conventionally known as methods for constructing earthen structures such as embankments and retaining walls.

(A)ジオテキスタイルを敷設し、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
側の一端を折り曲げ、この中に土砂をつつみ込んで土層
を形成し、この工程を繰り返しながら前記土層を積み重
ねて土構造物を構築する方法。
(A) A geotextile is laid, earth and sand is poured out on top of it, compacted, and one end of the free end of the geotextile is bent, and earth and sand is stuffed into it to form a soil layer, and this process is repeated while A method of building earth structures by stacking soil layers.

この方法はジオテキスタイルが土層と一体化してひき抜
けにくく、したがって、摩擦力の小さな粘性土にも使用
できる利点を利用したものである。
This method utilizes the advantage that geotextile is integrated with the soil layer and is difficult to pull out, so it can be used even on cohesive soil with low frictional force.

(B)前記(A)の土構造物の自由端側に適宜の壁面部
材を連結して壁面部材の有する土構造物を構築する方法
(B) A method of constructing an earth structure included in the wall member by connecting an appropriate wall member to the free end side of the earth structure of (A) above.

(C)発泡スチロール等の発泡性合成樹脂ブロックを積
み上げて盛土を構築する方法。
(C) A method of building an embankment by piling up foamable synthetic resin blocks such as styrofoam.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

しかしながら、前述の公知技術において、(A)の方法
はジオテキスタイルの自由端側の一端を折り曲げてこの
中に土砂をつつみ込みながら積み重ねるため、作業が非
常に困難であって施工性に劣り、また、ジオテキスタイ
ルそのものが変形しやすいため、擁壁のような大きな土
構造物を正確な形状に構築することが不可能である。
However, in the above-mentioned known technology, method (A) involves bending one free end of the geotextile and stacking it while encasing earth and sand, which makes the work extremely difficult and has poor workability. The geotextile itself is easily deformed, making it impossible to construct large earthen structures such as retaining walls into precise shapes.

また、(B)の方法は土砂として粘性土を用いる場合、
土構造物の圧縮が大きくなり、このため壁面部材との連
結部に圧力集中が起こって破壊されやすく、せっかくの
ジオテキスタイルの粘性土への適用性を発揮できな(な
る。
In addition, in method (B), when clayey soil is used as the earth and sand,
The compression of the earth structure increases, and as a result, pressure concentrates at the joints with the wall members, making them more likely to break, making it impossible for geotextiles to demonstrate their applicability to clayey soil.

さらに(C)の方法は発泡性合成樹脂ブロックが軽量な
ため地震に゛よって容易に崩壊してしまい、また、水よ
り軽いため地下水面下では浮き上がってしまい、その実
用性には極めて問題がある。
Furthermore, in method (C), the foamed synthetic resin block is lightweight, so it easily collapses in an earthquake, and since it is lighter than water, it floats under the groundwater table, making it extremely impractical. .

本発明の目的は施工性に優れ、かつ破壊しにくい強固な
土構造物を形成し得、前述の公知技術に存する欠点を改
良した土構造物の構築方法を提供することにある。
An object of the present invention is to provide a method for constructing an earth structure that can form a strong earth structure that has excellent workability and is difficult to destroy, and that improves the drawbacks of the above-mentioned known techniques.

〔問題点を解決するための手段〕[Means for solving problems]

前述の目的を達成するため、本発明によれば、端部に発
泡性合成樹脂ブロックが保持されたジオテキスタイルを
前記ブロックの保持された部分が自由端側に位置するよ
うに地盤上に敷設し、この上に土砂をまき出し、転圧し
て土層を形成し、この工程を繰り返して前記土層を積み
重ねることを特徴とする。
In order to achieve the above-mentioned object, according to the present invention, a geotextile having a foamable synthetic resin block held at its end is laid on the ground such that the portion where the block is held is located on the free end side, The method is characterized by sprinkling earth and sand on top of this, rolling it to form a soil layer, and repeating this process to stack the soil layers.

前述のジオテキスタイルは合成樹脂製の皐ソト、グリツ
ド、不織布、織布、シートあるいはこれらの複合材料で
ある。
The geotextile mentioned above is a synthetic resin fiber, grid, nonwoven fabric, woven fabric, sheet, or a composite material thereof.

また、発泡性合成樹脂ブロックは発泡スチロールブロッ
ク等、荷重により圧縮可能なブロックである。発泡スチ
ロールブロックとしては例えば、密度が20に+r/r
r+、圧縮強度が5%変形時に1 k+r r/cnl
程度のものが最適である。
Further, the foamable synthetic resin block is a block that can be compressed under load, such as a foamed polystyrene block. For example, as a styrofoam block, the density is 20+r/r
r+, compressive strength is 1 k+r r/cnl at 5% deformation
A moderate amount is best.

本発明ではまず、前述のジオテキスタイルを地盤上に敷
設する。この際、前記ジオテキスタイルの端部には発泡
性合成樹脂ブロックが保持される。
In the present invention, first, the above-mentioned geotextile is laid on the ground. At this time, a foamable synthetic resin block is held at the end of the geotextile.

また、このジオテキスタイルはブロックの保持された部
分が自由端側に位置するように敷設される。
Moreover, this geotextile is laid so that the retained part of the block is located on the free end side.

これを添付図面を用いて以下のとおりに詳述する。This will be explained in detail below using the accompanying drawings.

第1図および第2図はジオテキスタイルの端部への発泡
性合成樹脂ブロックの保持態様を示した断面図であって
、Aは地盤である。地盤A上に例えばポリエチレンシー
トからなる透水性のジオテキスタイル1を敷設し、かつ
この上に中1.0m、厚さ0.5m、長さ3.0mの発
泡スチロールブロック2を載置し、次いで第1図示のよ
うにジオテキスタイルlの一端1aを折り返して発泡ス
チロールブロック2を内部につつみ込み、その後この上
に土砂3をまき出し、転圧して土層4を形成する。この
とき発泡スチロールブロック2の保持された部分はジオ
テキスタイル1の端部Bとなる。また、この端部Bの一
面Cは後述のとおり、得られる土構造物の自由端となる
。なお、発泡スチロール2は第2図示のようにジオテキ
スタイル1上に土砂3をまき出し、転圧した後にジオテ
キスタイルlの一端1aを土砂3の上に折り返して保持
されてもかまわない。
1 and 2 are cross-sectional views showing how a foamable synthetic resin block is held at the end of a geotextile, and A is the ground. A water-permeable geotextile 1 made of, for example, a polyethylene sheet is laid on the ground A, and a Styrofoam block 2 with a diameter of 1.0 m, a thickness of 0.5 m, and a length of 3.0 m is placed on top of this. As shown in the figure, one end 1a of the geotextile 1 is folded back and a styrene foam block 2 is wrapped inside, and then earth and sand 3 is poured out on top of the block 2 and is compacted to form a soil layer 4. At this time, the portion where the expanded polystyrene block 2 is held becomes the end portion B of the geotextile 1. Moreover, one side C of this end B becomes a free end of the obtained earth structure as described later. Note that the styrofoam 2 may be held by sprinkling earth and sand 3 onto the geotextile 1 and rolling it, and then folding one end 1a of the geotextile 1 over the earth and sand 3, as shown in the second figure.

次いで、前述の工程を繰り返して土層を積み重ね、本発
明にかかる土構造物を構築する。第3図および第4図は
本発明により構築された土構造物の一例を示した断面図
である。第3図において、発泡スチロール2の保持され
ているジオテキスタイル1の端部Bが垂直方向に重なり
合って伸長するように土層4を積み重ね、土構造物りが
構築される。したがって、この場合、各土層4.4・・
4の自由端C,C・・も垂直方向に伸長し、土構造物り
の壁面Eを形成する。なお、図示しないが、壁面Eを紫
外線等から保護するために、壁面E上にさらにコンクリ
ート等からなる他の防護壁を形成してもかまわない。
Next, the above-described steps are repeated to stack the soil layers to construct the soil structure according to the present invention. FIGS. 3 and 4 are cross-sectional views showing an example of an earth structure constructed according to the present invention. In FIG. 3, an earth structure is constructed by stacking soil layers 4 such that the end portions B of the geotextile 1 holding the Styrofoam 2 are vertically overlapping and extending. Therefore, in this case, each soil layer 4.4...
The free ends C, C, etc. of 4 also extend in the vertical direction and form the wall surface E of the earth structure. Although not shown, another protective wall made of concrete or the like may be further formed on the wall E in order to protect the wall E from ultraviolet rays or the like.

なお、本発明では第4図示のように発泡スチロール2の
保持されているジオテキスタイルlの端部Bが斜め上方
向に伸長するように土層4を積み重ね、土構造物りを構
築することもできる。この場合、各土層4.4・・4の
自由端C,,C・・Cを保護するために、この上に芝生
等の草類5を(直生ずることもできる。
In addition, in the present invention, it is also possible to construct an earth structure by stacking the soil layers 4 so that the end portion B of the geotextile l holding the expanded polystyrene 2 extends diagonally upward as shown in the fourth figure. In this case, in order to protect the free ends C, .

〔作用〕[Effect]

(1)ジオテキスタイルの端部に発泡性合成樹脂ブロッ
クが保持されており、このブロックの作用により土構造
物の自由端側の形状が正確に保たれる。このブロックが
存在しなければ、前述従来の技術(A)のように土構造
物を正確な形状に構築することが不可能となる。
(1) A foamable synthetic resin block is held at the end of the geotextile, and the shape of the free end of the earth structure is maintained accurately by the action of this block. If this block does not exist, it becomes impossible to construct an earth structure in an accurate shape as in the conventional technique (A) described above.

(2)発泡性合成樹脂ブロックがジオテキスタイルでつ
つみ込まれるように保持されるため、極めて強固に構築
される。したがって、前述従来の技術(B)のように壁
面部材との連結部が破壊されることがない。
(2) Since the foamable synthetic resin block is surrounded and held by geotextile, it is extremely strong. Therefore, unlike the prior art (B) mentioned above, the connecting portion with the wall member is not destroyed.

(3)発泡性合成樹脂ブロックが可撓性を有し、かつ圧
縮性があり、しかもジオテキスタイルでつつまれるよう
にして保持されるので、圧縮に順応して自由に変形し、
このため特別な応力集中が作用せず、破壊しにりく、か
つ−体上された土構造物が構築される。
(3) Since the foamable synthetic resin block is flexible and compressible, and is held in a manner surrounded by geotextile, it can freely deform to adapt to compression.
For this reason, no special stress concentration acts, and an earth structure that is difficult to break and is easily constructed can be constructed.

(4)ブロックが従来のように剛性の場合には変形しに
くいため、第5図示のようにすべり面はlOaの位置と
なるが、本発明では可撓性を有する発泡性合成樹脂ブロ
ックを用いるため、すべり面が10の位置になる。した
がって、ブロック背部のジオテキスタイル1の長さしは
剛性ブロックの場合より短くてすむ、また、ジオテキス
タイル1は第5図示のように、固定領域(ロ)まで敷設
されればよく、これによりゆるみ領域(イ)の部分はジ
オテキスタイルのL′の部分で固定されることになり、
前述ブロックは地震や地下水等により崩壊される心配が
なく、土構造物全体と一体化される。
(4) If the block is rigid like in the past, it is difficult to deform, so the sliding surface is at a position of lOa as shown in Figure 5, but in the present invention, a flexible foamable synthetic resin block is used. Therefore, the slip plane is at position 10. Therefore, the length of the geotextile 1 on the back of the block can be shorter than in the case of a rigid block, and the geotextile 1 only needs to be laid down to the fixed area (b), as shown in Figure 5, so that the loose area ( The part a) will be fixed with the L′ part of the geotextile,
There is no fear that the aforementioned blocks will collapse due to earthquakes, groundwater, etc., and are integrated into the entire earth structure.

(5)第6図のように本発明による土構造物りはこの重
量体により背面土圧(ハ)に抵抗する土留効果を呈する
。また、従来の土構造物では第6図のように土留前面部
の地盤圧力Pが極めて大きく、このため地盤支持力の大
きな基礎地盤にしか適用されなかったが、本発明では軽
量かつ可撓性のある発泡性合成樹脂ブロックを用いるた
め、土構造物りの前部の地盤圧力はP′であって小さく
なり、軟弱な基礎地盤上にも適用し得る。
(5) As shown in FIG. 6, the earth structure beam according to the present invention exhibits an earth retaining effect that resists back earth pressure (c) due to the heavy body. In addition, in conventional earth structures, the ground pressure P at the front of the earth retaining area is extremely large as shown in Figure 6, and for this reason, it was only applicable to foundations with a large ground bearing capacity.However, the present invention is lightweight and flexible. Since a foamable synthetic resin block is used, the ground pressure at the front of the earth structure is P', which is small, and it can be applied even on soft foundation ground.

(6)本発明にかかる土構造物は自由端に外装として壁
面パネルを設置する場合、土構造物と外装とを別々に独
立して施工し得るので構造上の破壊が起こらず、作業性
も簡単である。したがって、外装は単に美観上の効果、
あるいは紫外線による劣化の防止効果があればよい。
(6) When a wall panel is installed as an exterior on the free end of the earth structure according to the present invention, the earth structure and the exterior can be constructed separately and independently, so structural damage does not occur and workability is improved. It's easy. Therefore, the exterior is simply an aesthetic effect,
Alternatively, it is sufficient if it has the effect of preventing deterioration caused by ultraviolet rays.

〔発明の効果〕〔Effect of the invention〕

以上のとおり、本発明は端部に発泡性合成樹脂ブロック
の保持されたジオテキスタイルを補強材として用い、こ
れを地盤に敷設し、土砂をまき出し、転圧して土層を形
成し、この土層を積み重ねるので、前述のとおり施工性
に優れ、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。
As described above, the present invention uses a geotextile with foamable synthetic resin blocks held at its ends as a reinforcing material, lays it on the ground, spreads out earth and sand, and forms a soil layer by rolling. As mentioned above, it is possible to build a strong earth structure that has excellent construction properties and is difficult to destroy.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図および第2図はそれぞれ本発明にかかる土層の具
体例を示し、第3図および第4図はそれぞれ本発明によ
って構築される土構造物の具体例を示し、第5図はすべ
り面等を表わした説明図であり、第6図は本発明土構造
物の荷重状態を表わした説明図である。 1・・・ジオテキスタイル、  2・・・発泡スチロー
ル、3・・・土砂、   4・・・土層、    A・
・・地盤、B・・・端部、  C・・・自由端、  D
・・・土構造物、E・・・壁面 特許出願人 強化土エンジニャリング株式会社箋a目
FIGS. 1 and 2 each show a specific example of the soil layer according to the present invention, FIGS. 3 and 4 each show a specific example of the soil structure constructed according to the present invention, and FIG. FIG. 6 is an explanatory diagram showing the surface etc., and FIG. 6 is an explanatory diagram showing the load state of the earth structure of the present invention. 1... Geotextile, 2... Styrofoam, 3... Sediment, 4... Soil layer, A.
...Ground, B...End, C...Free end, D
...Earth structure, E...Wall patent applicant Reinforced Earth Engineering Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 端部に発泡性合成樹脂ブロックが保持されたジオテキス
タイルを前記ブロックの保持された部分が自由端側に位
置するように地盤上に敷設し、この上に土砂をまき出し
、転圧して土層を形成し、この工程を繰り返して前記土
層を積み重ねることを特徴とする土構造物の構築方法。
A geotextile with a foamable synthetic resin block held at the end is laid on the ground so that the part where the block is held is located on the free end side, and earth and sand are spread on top of this and compacted to form a soil layer. A method for constructing an earth structure, characterized in that the soil layers are stacked by repeating this step.
JP14962186A 1986-06-27 1986-06-27 Construction of soil structure Granted JPS637421A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14962186A JPS637421A (en) 1986-06-27 1986-06-27 Construction of soil structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14962186A JPS637421A (en) 1986-06-27 1986-06-27 Construction of soil structure

Publications (2)

Publication Number Publication Date
JPS637421A true JPS637421A (en) 1988-01-13
JPH0321686B2 JPH0321686B2 (en) 1991-03-25

Family

ID=15479219

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14962186A Granted JPS637421A (en) 1986-06-27 1986-06-27 Construction of soil structure

Country Status (1)

Country Link
JP (1) JPS637421A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02167926A (en) * 1988-12-20 1990-06-28 Taisei Corp Vibration-proof structure for banking
KR100232428B1 (en) * 1991-07-03 1999-12-01 알레산드로 마카페리 Method of and an element for the production of structures for containing areas of ground
KR100889257B1 (en) * 2008-05-08 2009-03-17 주식회사 제일엔지니어링 Precast concrete facing panel using greening of retaining panel's front
KR100929861B1 (en) 2009-06-17 2009-12-04 허원석 Method for constructing a reinforcement structure for a perforated slope using a crank shaped anchor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02167926A (en) * 1988-12-20 1990-06-28 Taisei Corp Vibration-proof structure for banking
KR100232428B1 (en) * 1991-07-03 1999-12-01 알레산드로 마카페리 Method of and an element for the production of structures for containing areas of ground
KR100889257B1 (en) * 2008-05-08 2009-03-17 주식회사 제일엔지니어링 Precast concrete facing panel using greening of retaining panel's front
KR100929861B1 (en) 2009-06-17 2009-12-04 허원석 Method for constructing a reinforcement structure for a perforated slope using a crank shaped anchor

Also Published As

Publication number Publication date
JPH0321686B2 (en) 1991-03-25

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