JP3918548B2 - Retaining wall for vertical embankment method - Google Patents

Retaining wall for vertical embankment method Download PDF

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Publication number
JP3918548B2
JP3918548B2 JP2001391996A JP2001391996A JP3918548B2 JP 3918548 B2 JP3918548 B2 JP 3918548B2 JP 2001391996 A JP2001391996 A JP 2001391996A JP 2001391996 A JP2001391996 A JP 2001391996A JP 3918548 B2 JP3918548 B2 JP 3918548B2
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Prior art keywords
embankment
retaining
retaining wall
steel material
plate
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JP2003184110A (en
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賀寿男 市川
邦彦 浜井
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Obayashi Corp
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Obayashi Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、鉛直盛土工法に用いられる擁壁に関する。
【0002】
【従来の技術】
擁壁を用いた鉛直盛土工法の一つに、テールアルメ工法や、多数アンカー式補強土壁工法がある。これらの工法は、予め構築された擁壁の背面と地山との間に鉄筋などの複数のアンカー体を水平に配置し、これを覆った状態に盛土を施し、締め固める手順を下部から順に繰返すことにより、最終的に計画断面まで仕上げる工法である。
【0003】
また、特願平10−25855号公報には、擁壁としてコンクリート製ブロック体を用い、このブロック体の組立てと背面における盛土の施工工程、および盛土とブロック体との間にソイルセメントなどの固化性盛土層を充填し、転圧する工程を下部から順に計画断面まで繰返すとともに、前記固化性盛土層内にブロックの背面に連結したアンカーを配置することで一体化を図った工法が開示されている。
【0004】
【発明が解決しようとする課題】
しかしながら、前者の工法では、盛土材料が「粗粒の良質材」に限定され、「粘性土」等のような盛土材として不適とされている材料を用いた場合には、盛土体としての安定性確保が難かった。
また、後者の工法では、壁面の転圧時の安定上、壁材としてのブロックの一個当りの重量を重くしなければ、転圧時土圧により擁壁としての安定性に問題を生ずる。このため、設置などに際して揚重機等を必要とするため、取扱作業性が悪かった。
また、壁材を順次上に継足すために、親杭を必要とし、杭を継いで行くなどの手間がかかっていた。
【0005】
本発明は以上の課題を解決するもので、その目的は、材厚が薄くても、盛土転圧時の土圧に対する耐久性が高く、自立安定性を得られるようにし、さらには建て込みに当っては親杭を不要とした鉛直盛土工法用擁壁を提供するものである。
【0006】
【課題を解決するための手段】
前記目的を達成するため、本発明の擁壁は、盛土表層を構成する所定高さの鉛直擁壁を構築する工程と、擁壁背面に所定間隔をおいてセメント安定処理土からなる盛土を施工するとともに、前記擁壁に向けて盛土内に第一のアンカー筋を水平に埋設する工程と、該第一のアンカー筋の盛土層からの突出端と前記擁壁背面に接続され盛土側に向けて突出する第二のアンカー筋とをジョイントする工程と、前記盛土の養生後に前記盛土と擁壁背面との間に形成された隙間をセメント安定処理土からなる盛土により埋め戻す工程とを所定高さに至るまで繰返す鉛直盛土工法に用いられる擁壁であって、
前記擁壁は、中央を前記盛土側に向けてアーチ状に湾曲膨出させた土留板と、横方向に隣合う土留板の端部に配置されて土留板を抑える抑え鋼材とからなり、前記第二のアンカー筋の擁壁接続端を前記抑え鋼材に締結することで、該抑え鋼材を介して隣合う土留板間を連結するとともに、土留板を自立状態に保持するものであり、前記抑え鋼材は土留板端部に配置される断面T字形ないしはL字形を二つ合わせてT字形としたウェブ及びフランジを有する鋼材であって、この抑え鋼材のウェブに開口された連結孔に前記第二のアンカー筋端部に形成されたフックボルト部を通し、ナットを締結するものであり、前記抑え鋼材は、前記土留板の端部が前記ウェブと前記フランジの付け根位置に配置されることで前記土留板を抑えることを特徴とするものである。
【0007】
したがって、本発明によれば、盛土転圧時の土圧によって発生する擁壁の曲げモーメントが平板に比べて非常に小さくなり、これにより擁壁の材厚を薄くすることができる。また、土留板を抑える前記抑え鋼材は土留板端部に配置される断面T字形ないしはL字形を二つ合わせてT字形としたウェブを有する鋼材であって、このアンカー鋼材のウェブに開口された連結孔に前記第二のアンカー筋端部に形成されたフックボルト部を通し、ナットを締結するものであることにより、土留板間の連結と同時に、アンカー筋に対する接合を同時に行うことができる。
【0008】
また、本発明において、前記土留板は高靱性セメントボードから構成されていることにより、材料面からの耐久性も向上できる
【0010】
さらに、本発明では、上下の土留板の中央部背面にまたがって平板状の連結プレートを配置し、両土留板および連結プレートに開口された連結孔にボルトを挿通し、ナットで締結することで、上下の土留板同士を連結するものであることにより、上下の土留板間の結合も強固に行うことができ、これによって親杭が不要となり、親杭の建て込みや継ぎ作業の手間が省略できる。
【0011】
【発明の実施の形態】
以下、本発明の好ましい実施の形態につき、添付図面を参照して詳細に説明する。図1、2は本実施形態にかかる擁壁およびその接合構造を示している。図において、擁壁1は、縦横に配列される複数の土留板2と、横方向にとなり合う土留板2間に介在されて土留板2を抑える抑え鋼材3と、縦方向に配列される土留板2同士を連結する連結プレート4とから構成されている。
【0012】
土留板2は、高靱性セメントボードからなるプレキャスト成形体であって、一回分の盛土高さを考慮してその高さは実寸法で450mm、幅884mm、厚み9mmとしてあるとともに、その中央が幅方向両側から93mm湾曲膨出したアーチ形湾曲形状となっており、この膨出部分を後述する盛土側に向けて配置することによって、土圧により発生する曲げモーメントを平板に比べて非常に小さくでき、その分厚みを小さくして面積を大きく取ることができるようにしている。
【0013】
前記抑え鋼材3は、断面L字形をなす一対の鋼材をT字形に組合わせ、そのウェブ3aの上下位置に開口された連結孔にボルト5を挿通し、ナット6により結合してT字形に組立てたものであって、各土留板2の端部をフランジ3bとウェブ3aの付け根位置に配置することで、土留板2間を抑える鋼材となる。 そして、ウェブ3aの中央には同じく連結孔が開口され、これにL字形に形成されたフックボルト部7を差し込み、反対側をナット6で連結している。
フックボルト部7は、第二のアンカー筋8の先端部をL字形に折曲げて形成したものである。
【0014】
この第二のアンカー筋8の後端部はターンバックル9を介して後述する盛土側に水平状態に埋設された第一のアンカー筋10の先端に緊結され、これによって、抑え鋼材3とともに各土留板2をその接合位置で自立状態に保持する。
【0015】
また、各土留板2の中央部上下には連結孔が開口され、上部側土留板2を下部側土留板2上に設置した状態で連結プレート4を孔位置に合わせて配置し、ボルト5およびナット6により連結プレート4を上下の土留板2をまたがって固定することで、上下の土留板2間を連結するようになっている。
【0016】
次に、以上の構成の擁壁1を用いた盛土の施工手順を図3、4を用いて説明する。まず、図3(a)に示すように、擁壁位置を所定量掘削し、砕石11および基礎12を設置し、その上に第一段目の擁壁1を設置する。このとき各土留板2は抑え鋼材3を介して横一列に配列しておき、また第二のアンカー筋8も抑え鋼材3に連結しておく。
【0017】
以上の作業完了後、盛土作業を行う。盛土作業は、土留板2の高さの略半分の高さである2cm厚みに土砂を撒き出し、次いで敷き均しを行い、ローラで転圧締固めを行う。このとき、擁壁1に近い位置では盛土材料にセメントを混合した安定処理土14を用い、これに引続く位置では一般土砂15を用いる。安定処理土14の盛土範囲は、第一のアンカー筋10の長さ以上の範囲とする。また、安定処理土14の先端部は擁壁1に接することがないように所定間隔離し、かつある程度の法勾配をもって盛土する。
【0018】
次いで、(b)に示すように、第一のアンカー筋10を盛土上に水平設置し、その先端を前記ターンバックル9を介して第二のアンカー筋8に接続する。
【0019】
その後は、(c)に示すように第一段目の擁壁1と同じ高さまで、安定処理土14および一般土砂15の撒き出しと転圧締固めを行い、一日の作業を終了する。この状態で、各土留板2はアンカー筋8,10により自立状態が保持される。
【0020】
二日目は、(d)に示すように、まず第二段目の擁壁1を第一段目の擁壁1上に設置し、前記連結プレート4を介して上下の擁壁1間を連結する。その後は、第一段目と同様に、例えば25cm厚みで安定処理土14および一般土砂15の撒き出し、敷き均しおよび転圧締固めを行う。
【0021】
このとき、安定処理土14は第一段目の擁壁1の背面を埋設し、第二段目に対しては一段目施工時と同様に、所定距離離間すべく盛土作業を行う。これによって第一段目の擁壁1には土圧が加わるが、翌日までの養生期間で第一段目の安定処理土14は固化し、かつアンカー筋8,9のアンカー効果によって第一段目の擁壁1は土圧に抗して自立性を保つ。
【0022】
その後(e)に示すように、第一段目と同じく第一のアンカー筋10を盛土上に水平設置して第二のアンカー筋8に接続し、(f)に示すごとく、残りの安定処理土14および一般土砂15の撒き出しと転圧締固めを行い、二日目の作業を終了する。
【0023】
以後は同様な要領により計画高さまで擁壁1の設置および連結と、盛土作業およびアンカー筋8,10の接続を繰返すことにより、図4に示すごとく擁壁1を盛土表層とする鉛直盛土を完成する。なお、図示の例では10段まであるから、10日間かけて高さ4m50cmの鉛直盛土が造成されることになる。
【0024】
以上の構成において、各土留板2に加わる土圧は、安定処理土中のセメントが固化するまでの期間であり、その大きさは盛土高さに関係なくほぼ一定となる。
なお、前記実施形態では、抑え鋼材3として断面L字形の鋼材を二つ合わせてT字形としたが、当初からT字形鋼材を使用すれば、締結用のボルトナットを省略できる。
【0027】
【発明の効果】
以上の説明により明らかなように、本発明の鉛直盛土工法用擁壁によれば、材厚が薄くても転圧時の土圧に対する耐久性が高く、自立安定性を得られるようにし、さらには建て込みに当っては親杭を不要とすることができる。
【図面の簡単な説明】
【図1】 本発明の第一実施形態による擁壁およびその組立構造を示す分解斜視図である。
【図2】 (a),(b)は同土留板の横方向接合位置における上下部、および中央部断面図である。
【図3】 (a)〜(f)は同擁壁を用いた鉛直盛土工法の施工手順を示す説明用断面図である。
【図4】 同盛土の完成状態を示す説明用断面図である
【符号の説明】
1 擁壁
2,20 土留板
3 抑え鋼材
4 連結プレート
5 ボルト
6 ナット
7 フックボルト部
8 第二のアンカー筋
9 ターンバックル
10 第一のアンカー筋
14 安定処理土
15 一般土砂
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a retaining wall used in a vertical embankment method.
[0002]
[Prior art]
One of the vertical embankment methods using retaining walls is the tail arme method and the multi-anchor type reinforced earth method. In these construction methods, a plurality of anchors such as reinforcing bars are placed horizontally between the back of the retaining wall that has been built in advance and the ground, and the embedding is performed in a state of covering this, and the procedure of compaction is performed in order from the bottom. It is a method of finishing to the planned cross section by repeating.
[0003]
In Japanese Patent Application No. 10-25855, a concrete block body is used as a retaining wall. The assembly of the block body and the embedding process on the back surface, and solidification of soil cement or the like between the embankment and the block body A method of filling the characteristic embankment layer and repeating the rolling process from the bottom to the planned cross section in order and integrating the anchoring structure connected to the back of the block in the solidification embankment layer is disclosed. .
[0004]
[Problems to be solved by the invention]
However, in the former construction method, the embankment material is limited to “coarse-grained high-quality material”, and when a material that is not suitable as a embankment material such as “viscous soil” is used, the embedding material is stable. It was difficult to secure the sex.
Moreover, in the latter construction method, if the weight per block as a wall material is not increased in terms of stability at the time of rolling the wall surface, a problem arises in stability as a retaining wall due to earth pressure at the time of rolling. For this reason, a lifting machine or the like is required for installation and the handling workability is poor.
In addition, in order to sequentially add the wall material upward, a parent pile was required, and it took time and effort to continue the pile.
[0005]
The present invention solves the above problems, and its purpose is to have high durability against earth pressure at the time of embankment rolling even when the material thickness is thin, and to obtain self-supporting stability. In this case, the retaining wall for vertical embankment method that does not require a parent pile is provided.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the retaining wall of the present invention is constructed by constructing a vertical retaining wall of a predetermined height constituting the embankment surface layer, and embankment made of cement-stabilized soil at a predetermined interval on the rear surface of the retaining wall. And horizontally embedding a first anchor bar in the embankment toward the retaining wall, and connecting the projecting end of the first anchor bar from the embankment layer and the back surface of the retaining wall toward the embankment side. And a step of filling the gap formed between the embankment and the back of the retaining wall with the embankment made of cement-stabilized soil after the embankment is cured. It is a retaining wall used in the vertical embankment method that repeats until
The retaining wall is composed of a retaining plate that is curved and bulged in an arch shape with the center facing the embankment side, and a restraining steel material that is disposed at the end of the retaining plate adjacent in the lateral direction to suppress the retaining plate, By fastening the retaining wall connecting end of the second anchor bar to the restraining steel material, the adjacent retaining plates are connected via the restraining steel material, and the retaining plate is held in a self-supporting state. The steel material is a steel material having a T-shaped web and a flange formed by combining two T-shaped or L-shaped cross sections arranged at the end of the retaining plate, and the second hole is formed in the connecting hole opened in the web of the restrained steel material. through a hook bolt portion formed on the anchor Sujitan of state, and are not fastening a nut, the restraining steel, by the end of the earth retaining plate is arranged at the base position of the flange and the web and wherein Rukoto suppress the earth retaining plate Is shall.
[0007]
Therefore, according to the present invention, the bending moment of the retaining wall generated by the earth pressure at the time of embankment rolling is significantly smaller than that of the flat plate, whereby the thickness of the retaining wall can be reduced. Further, the restraining steel material for restraining the retaining plate is a steel material having a T-shaped web formed by combining two T-shaped or L-shaped cross sections arranged at the end of the retaining plate, and opened to the web of the anchor steel material. By passing the hook bolt portion formed at the end of the second anchor bar through the connecting hole and fastening the nut, the anchor bars can be joined simultaneously with the connection between the retaining plates.
[0008]
Moreover, in this invention, the durability from the material surface can also be improved because the said retaining plate is comprised from the tough cement board .
[0010]
Furthermore, in the present invention, a flat plate-like connecting plate is arranged across the back of the center part of the upper and lower earth retaining plates, bolts are inserted into the connecting holes opened in both the earth retaining plates and the connecting plate, and tightened with nuts. By connecting the upper and lower earth retaining plates, the upper and lower earth retaining plates can be firmly connected, which eliminates the need for parent piles and eliminates the need for construction and joint work. it can.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Figure 2 shows a retaining wall and the junction structure according to the present implementation embodiment. In the figure, a retaining wall 1 includes a plurality of retaining plates 2 arranged vertically and horizontally, a restraining steel material 3 interposed between the retaining plates 2 that cross each other in the transverse direction, and a retaining member arranged in the longitudinal direction. It is comprised from the connection plate 4 which connects board 2 mutually.
[0012]
The earth retaining plate 2 is a precast molded body made of a high toughness cement board. The height is 450 mm, the width is 884 mm, the thickness is 9 mm in consideration of the height of one embankment, and the center is the width. It has an arch-shaped curved shape that bulges 93 mm from both sides in the direction. By arranging this bulged part toward the embankment side, which will be described later, the bending moment generated by earth pressure can be made much smaller than that of a flat plate. Accordingly, the thickness can be reduced to increase the area.
[0013]
The restraining steel material 3 is composed of a pair of steel materials having an L-shaped cross section in a T shape, and bolts 5 are inserted into connecting holes opened at the upper and lower positions of the web 3a and are joined by nuts 6 to be assembled into a T shape. Therefore, by arranging the end portion of each earth retaining plate 2 at the base position of the flange 3b and the web 3a, a steel material that suppresses the space between the earth retaining plates 2 is obtained. And the connecting hole is similarly opened in the center of the web 3a, the hook bolt part 7 formed in the L-shape is inserted in this, and the opposite side is connected with the nut 6. FIG.
The hook bolt portion 7 is formed by bending the distal end portion of the second anchor bar 8 into an L shape.
[0014]
The rear end portion of the second anchor bar 8 is fastened to the tip of a first anchor bar 10 embedded in a horizontal state on the embankment side, which will be described later, via a turn buckle 9. The plate 2 is held in a self-supporting state at the joining position.
[0015]
In addition, a connecting hole is opened above and below the center portion of each earth retaining plate 2, and the connecting plate 4 is arranged in accordance with the hole position with the upper side earth retaining plate 2 installed on the lower side earth retaining plate 2. The upper and lower earth retaining plates 2 are connected by fixing the connecting plate 4 across the upper and lower earth retaining plates 2 with the nut 6.
[0016]
Next, an embankment construction procedure using the retaining wall 1 having the above configuration will be described with reference to FIGS. First, as shown in FIG. 3A, a predetermined amount of the retaining wall position is excavated, the crushed stone 11 and the foundation 12 are installed, and the first stage retaining wall 1 is installed thereon. At this time, the earth retaining plates 2 are arranged in a horizontal row through the restraining steel material 3, and the second anchor bars 8 are also connected to the restraining steel material 3.
[0017]
After the above work is completed, embankment work is performed. Embankment work, out sprinkled sand to 2 cm thickness is the height of approximately half the height of earth retaining plate 2, and then subjected to leveling flooring, performs rolling pressing compaction at low la. At this time, the stabilized soil 14 in which cement is mixed with the embankment material is used at a position close to the retaining wall 1, and the general earth and sand 15 is used at a position subsequent to this. The embankment range of the stable treated soil 14 is set to a range equal to or longer than the length of the first anchor muscle 10. Further, the tip of the stabilized soil 14 is separated by a predetermined distance so as not to contact the retaining wall 1 and is filled with a certain gradient.
[0018]
Next, as shown in (b), the first anchor bar 10 is horizontally installed on the embankment, and its tip is connected to the second anchor bar 8 via the turnbuckle 9.
[0019]
After that, as shown in (c), the stabilized soil 14 and the general earth and sand 15 are squeezed out and compacted and compacted to the same height as the retaining wall 1 of the first stage, and the work of one day is completed. In this state, each earth retaining plate 2 is maintained in a self-supporting state by the anchor bars 8 and 10.
[0020]
On the second day, as shown in (d), first, the second stage retaining wall 1 is first installed on the first stage retaining wall 1, and the space between the upper and lower retaining walls 1 is interposed via the connecting plate 4. Link. After that, as in the first stage, for example, the stabilized soil 14 and the general earth and sand 15 are spread out with a thickness of 25 cm, spread and compacted.
[0021]
At this time, the stabilized soil 14 embeds the back surface of the first-stage retaining wall 1, and performs a banking operation on the second stage so as to be separated by a predetermined distance as in the first-stage construction. As a result, earth pressure is applied to the first-stage retaining wall 1, but the first-stage stable treated soil 14 is solidified during the curing period until the next day, and the anchor effect of the anchor bars 8 and 9 causes the first stage The retaining wall 1 of the eye maintains independence against the earth pressure.
[0022]
Thereafter, as shown in (e), the first anchor bar 10 is horizontally installed on the embankment and connected to the second anchor bar 8 as in the first stage, and the remaining stabilization treatment is performed as shown in (f). The soil 14 and the general earth and sand 15 are squeezed out and compacted, and the work on the second day is completed.
[0023]
After that, by repeating the installation and connection of the retaining wall 1 up to the planned height, the embankment work, and the connection of the anchor bars 8 and 10 in the same manner, the vertical embankment with the retaining wall 1 as the embankment surface as shown in FIG. 4 is completed. To do. In the illustrated example, since there are up to 10 stages, a vertical embankment with a height of 4 m and 50 cm is created over 10 days.
[0024]
In the above configuration, the earth pressure applied to each earth retaining plate 2 is a period until the cement in the stabilized soil is solidified, and the size thereof is substantially constant regardless of the embankment height.
In addition, in the said embodiment, although the steel material of a cross-sectional L shape was put together as the restraining steel material 3 and it was set as the T shape, if the T shape steel material is used from the beginning, the bolt nut for fastening can be abbreviate | omitted.
[0027]
【The invention's effect】
As is clear from the above description, according to the retaining wall for vertical embankment method of the present invention, even if the material thickness is thin, durability against earth pressure at the time of rolling is high, so that self-supporting stability can be obtained. Can eliminate the need for parent piles.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a retaining wall and an assembly structure thereof according to a first embodiment of the present invention.
FIGS. 2A and 2B are cross-sectional views of the upper and lower parts and the center part of the earth retaining plate at the lateral joining position.
FIGS. 3A to 3F are cross-sectional views for explaining a construction procedure of a vertical embankment method using the retaining wall.
FIG. 4 is an explanatory sectional view showing a completed state of the bank .
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Retaining wall 2,20 Earth retaining plate 3 Retaining steel material 4 Connection plate 5 Bolt 6 Nut 7 Hook bolt part 8 Second anchor bar 9 Turnbuckle 10 First anchor bar 14 Stabilized soil 15 General earth and sand

Claims (3)

盛土表層を構成する所定高さの鉛直擁壁を構築する工程と、擁壁背面に所定間隔をおいてセメント安定処理土からなる盛土を施工するとともに、前記擁壁に向けて盛土内に第一のアンカー筋を水平に埋設する工程と、該第一のアンカー筋の盛土層からの突出端と前記擁壁背面に接続され盛土側に向けて突出する第二のアンカー筋とをジョイントする工程と、前記盛土の養生後に前記盛土と擁壁背面との間に形成された隙間をセメント安定処理土からなる盛土により埋め戻す工程とを所定高さに至るまで繰返す鉛直盛土工法に用いられる擁壁であって、
前記擁壁は、中央を前記盛土側に向けてアーチ状に湾曲膨出させた土留板と、横方向に隣合う土留板の端部に配置されて土留板を抑える抑え鋼材とからなり、前記第二のアンカー筋の擁壁接続端を前記抑え鋼材に締結することで、該抑え鋼材を介して隣合う土留板間を連結するとともに、土留板を自立状態に保持するものであり、
前記抑え鋼材は土留板端部に配置される断面T字形ないしはL字形を二つ合わせてT字形としたウェブ及びフランジを有する鋼材であって、この抑え鋼材のウェブに開口された連結孔に前記第二のアンカー筋端部に形成されたフックボルト部を通し、ナットを締結するものであり、
前記抑え鋼材は、前記土留板の端部が前記ウェブと前記フランジの付け根位置に配置されることで前記土留板を抑えることを特徴とする鉛直盛土工法用擁壁。
A step of constructing a vertical retaining wall of a predetermined height that constitutes the embankment surface layer, and a embankment made of cement-stabilized soil with a predetermined interval on the back surface of the retaining wall, and first in the embankment toward the retaining wall A step of horizontally burying the anchor bars, and a step of connecting the projecting end of the first anchor bars from the embankment layer and the second anchor bars connected to the back surface of the retaining wall and projecting toward the embankment side; A retaining wall used in a vertical embankment method that repeats the process of filling the gap formed between the embankment and the back of the retaining wall with the embankment made of cement-stabilized soil up to a predetermined height after curing the embankment There,
The retaining wall is composed of a retaining plate that is curved and bulged in an arch shape with the center facing the embankment side, and a restraining steel material that is disposed at the end of the retaining plate adjacent in the lateral direction to suppress the retaining plate, By fastening the retaining wall connecting end of the second anchor bar to the restraining steel material, the adjacent retaining plates are connected through the restraining steel material, and the retaining plate is held in a self-supporting state,
The holding steel material is a steel material having a T-shaped web and a flange formed by combining two T-shaped or L-shaped cross sections disposed at the end of the retaining plate, and the connecting hole opened in the web of the holding steel material through a hook bolt portion formed on the second anchor Sujitan unit state, and are not to fasten the nut,
The suppressed steel, the earth retaining plate vertical fill method for a retaining wall, characterized in Rukoto suppress the earth retaining plate at the end portion is arranged at the base position of the flange and the web.
前記土留板は高靱性セメントボードから構成されていることを特徴とする請求項1に記載の鉛直盛土工法用擁壁。  The retaining wall for a vertical embankment method according to claim 1, wherein the earth retaining plate is composed of a tough cement board. 上下の土留板の中央部背面にまたがって平板状の連結プレートを配置し、両土留板および連結プレートに開口された連結孔にボルトを挿通し、ナットで締結することで、上下の土留板同士を連結するものであることを特徴とする請求項1又は2に記載の鉛直盛土工法用擁壁。Place a flat connecting plate across the back of the center of the upper and lower earth retaining plates, insert bolts into the connection holes opened in both earth retaining plates and the connecting plate, and fasten with nuts. The retaining wall for a vertical embankment method according to claim 1 , wherein the retaining walls are connected to each other.
JP2001391996A 2001-12-25 2001-12-25 Retaining wall for vertical embankment method Expired - Fee Related JP3918548B2 (en)

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