JP3923449B2 - Retaining wall block - Google Patents

Description

【０１５５】
【数２】

すなわち、滑動安全率Ｆｓが、例えば、１．５と同等ないしはそれよりも大きくなるように滑動抵抗力Ｆｒを設定することにより、擁壁ブロックの前後幅を極力抑える（短幅に形成する）ことができると共に、滑動安全率Ｆｓを適正に確保することができる。
【０１５６】
なお、滑動安全率Fsは、一般的には1.5であるが、現場の諸条件等により変動する場合は、その値に準ずる。また、摩擦係数μは、例えば、0.600として計算することができる。
【０１５７】
〔第３実施例としての段積み工法〕
第３実施例としての段積み工法は、図３２に示すように、曲線施工の場合に、滑動安全率Fsが前記「数１」の関係を満足しない段位の擁壁ブロックＡは、滑動防止片２を具備する擁壁ブロックＡを採用して、単数の擁壁ブロックＡ毎に左右方向に所定の間隔を開けて不連続状態に敷設すると共に、上段の擁壁ブロックＡは下段の擁壁ブロックＡの直上方位置に載置し、滑動安全率Fsが前記「数１」の関係を満足する段位の擁壁ブロックＡは、各段毎に左右方向に連続させて敷設するようにしている。
【０１５８】
このようにして、滑動安全率Fsが上記の関係を満足しない段位、例えば、一段目と二段目についてだけ、滑動防止片２を設けた擁壁ブロックＡを単数毎に段積み（いわゆる、イモ積み）して、同滑動防止片２により滑動安全率Fsを適正に確保すると共に、単数毎に左右方向にあらかじめ設定した間隔を開けて不連続状態に敷設することにより、一段目と二段目の曲率半径の違いに基づく左右方向のずれを調整することができる。
【０１５９】
そして、滑動安全率Fsが上記の関係を満足する段位、例えば、三段目以降については、滑動防止片２を設けていない擁壁ブロックＡを、下段の擁壁ブロックＡの位置とは関係なく、各段毎に左右方向に連続させて敷設することができる。
【０１６０】
そのため、左右方向の間隔設定を行うことなく、楽に敷設作業を行うことができると共に、擁壁構築時間を大幅に短縮させることができる。
【０１６１】
なお、滑動安全率Fsが上記の関係を満足する段位についても、必要に応じて滑動防止片２を設けた擁壁ブロックを敷設することができる。
【０１６２】
〔第４実施例としての段積み工法〕
第４実施例としての段積み工法は、図３３に示すように、曲線施工の場合に、滑動安全率Fsが前記「数１」の関係を満足しない段位の擁壁ブロックＡは、滑動防止片２を具備する擁壁ブロックＡを採用して、連続敷設許容範囲内の複数（本実施例では三個）の擁壁ブロックＡを左右方向に連続させて敷設することにより複数擁壁ブロック組Gaを形成すると共に、左右方向に隣接する複数擁壁ブロック組Ga,Ga同士の間には所定の間隔を開けて不連続状態となし、上段の擁壁ブロックＡは下段の擁壁ブロックＡの上方位置に載置し、滑動安全率Fsが前記「数１」の関係を満足する段位の擁壁ブロックＡは左右方向に連続させて敷設するようにしている。
【０１６３】
このようにして、滑動安全率Fsが上記の関係を満足しない段位、例えば、一段目と二段目についてだけ、滑動防止片２を設けた擁壁ブロックＡを、曲線施工の曲率半径に応じて、連続敷設許容範囲内の複数の擁壁ブロックＡを左右方向に連続させて敷設することにより複数擁壁ブロック組Gaを形成すると共に、左右方向に隣接する複数擁壁ブロック組Ga,Ga同士の間にはあらかじめ設定した間隔を開けて不連続状態となして、各複数擁壁ブロック組Ga,Ga毎に段積みして、滑動防止片２により滑動安全率Fsを適正に確保すると共に、各複数擁壁ブロック組Ga毎に左右方向にあらかじめ設定した間隔を開けて不連続状態に敷設することにより、一段目と二段目の曲率半径の違いに基づく左右方向のずれを調整することができる。
【０１６４】
この際、複数擁壁ブロック組Gaを形成する擁壁ブロックＡの連続数は、曲線施工における曲率半径に応じて、すなわち、曲率半径が小さい場合には、擁壁ブロックＡの連続数を少なく設定し、また、曲率半径が大きい場合には、擁壁ブロックＡの連続数は多く設定することができ、かかる擁壁ブロックＡの連続数に応じて各複数擁壁ブロック組Ga,Ga同士の左右方向の間隔をあらかじめ設定することができるため、滑動安全率Fsが上記の関係を満足しない段位の擁壁ブロックＡの敷設作業を非常に楽に行うことができる。
【０１６５】
そして、滑動安全率Fsが上記の関係を満足する段位、例えば、三段目以降については、滑動防止片２を設けていない擁壁ブロックＡを、下段の擁壁ブロックＡの位置とは関係なく、各段毎に左右方向に連続させて敷設することができる。
【０１６６】
そのため、左右方向の間隔設定を行うことなく、楽に敷設作業を行うことができると共に、擁壁構築時間を大幅に短縮させることができる。
【０１６７】
なお、滑動安全率Fsが上記の関係を満足する段位についても、必要に応じて滑動防止片２を設けた擁壁ブロックＡを敷設することができる。
【０１６８】
〔第５実施例としての段積み工法〕
第５実施例としての段積み工法は、図３４に示すように、曲線施工の場合に、滑動安全率Fsが前記「数１」の関係を満足しない段位の擁壁ブロックは、左右方向に位置調節自在の滑動防止片２を具備する擁壁ブロックＡを採用して、左右方向に連続させて敷設するようにしている。
【０１６９】
このようにして、滑動安全率Fsが前記「数１」の関係を満足しない段位、例えば、一段目と二段目についてだけ、滑動防止片２を設けた擁壁ブロックＡを左右方向に連続させて敷設して、各滑動防止片２により滑動安全率Fsを適正に確保することができる。
【０１７０】
この際、滑動防止片２は、左右方向位置決め体８を介して左右方向に位置調節自在に配置することができるため、左右方向に位置ずれしたブロック本体１の上段の列を適宜位置決めした後に、各滑動防止片２を左右方向に適宜位置調節して所要の位置に配置することにより、上段に段積みしたブロック本体１の滑動を確実に防止することができる。
【０１７１】
そして、滑動安全率Fsが上記の関係を満足する段位、例えば、三段目以降については、滑動防止片２を設けていない擁壁ブロックＡを、下段の擁壁ブロックＡの位置とは関係なく、各段毎に左右方向に連続させて敷設することができる。
【０１７２】
そのため、左右方向の間隔設定を行うことなく、楽に敷設作業を行うことができると共に、擁壁構築時間を大幅に短縮させることができる。
【０１７３】
なお、滑動安全率Fsが上記の関係を満足する段位についても、必要に応じて滑動防止片２を設けた擁壁ブロックＡを敷設することができる。
【０１７４】
〔第６実施例としての擁壁ブロック〕
図３５は、第６実施例としての基礎ブロックＢと魚巣用の擁壁ブロックA1と植生用の擁壁ブロックA2とにより構築した護岸擁壁Ｙを示しており、同護岸擁壁Ｙは、河床K1の地盤中に基礎ブロックＢと複数段（本実施例では二段）の魚巣用の擁壁ブロックA1を根入れブロックとして段積みし、さらにその上の河川K2中に複数段（本実施例では二段）の魚巣用の擁壁ブロックA1を段積みし、さらにその上に複数段（本実施例では五段）の植生用の擁壁ブロックA2を段積みして構築している。
【０１７５】
そして、基礎ブロックＢ内と魚巣用の擁壁ブロックA1内には、例えば、50mm〜150mmの栗石を胴込め材Ｄとして充填すると共に、これらのブロックB,A1の背後に同じ栗石を裏込め材Ｕとして充填し、また、植生用の擁壁ブロックA2内には、例えば、0.01mm〜50mmの砕石を胴込め材Ｄとして充填すると共に、同擁壁ブロックA2の背後に同じ砕石を裏込め材Ｕとして充填している。
【０１７６】
ここで、魚巣用の擁壁ブロックA1と植生用の擁壁ブロックA2は、図３６及び図３７にも示すように、それぞれ前記した第１実施例としての擁壁ブロックＡと基本的構造を同じくしており、ブロック本体１の左右側前部の天端面に略鉛直方向に伸延する差込孔11,11を形成して、各差込孔11,11中に滑動防止片2,2（図２５参照）と吊上用連結片41,41（図３８参照）のいずれかの下部を選択的に差し込み可能としている。
【０１７７】
このようにして、ブロック本体１の左右側前部の天端面に形成した差込孔11,11中に、滑動防止片2,2の下部を差し込んで、同滑動防止片2,2を天端面より上方へ突出させ、同滑動防止片2,2にブロック本体１の直上方に段積みするブロック本体１の前面下部を当接させることにより、上段のブロック本体１の前方への滑動を防止することができる。
【０１７８】
そして、滑動防止片2,2により上段に段積みしたブロック本体１の滑動を防止することにより、下段のブロック本体１に前記滑動抵抗力Frを付加することができる。
【０１７９】
また、ブロック本体１の左右側前部の天端面に形成した差込孔11,11中に、吊上用連結片41,41の下部を差し込んで、同吊上用連結片41,41を天端面より上方へ突出させ、同吊上用連結片41,41を吊上用ワイヤ等を介して吊上作業機に連結することにより、同吊上作業機にて擁壁ブロックA1,A2を容易に吊り上げることができる。
【０１８０】
ここで、吊上用連結片41は、図３８に示すように、連結本片41aの上端部にリング状連結片41bを形成すると共に、連結本片41aの下端部に係止片41cを形成して、同係止片41cを差込孔11中に係止させる一方、リング状連結片41bに吊上用ワイヤ等を連結するようにしている。
【０１８１】
従って、擁壁ブロックA1,A2を吊上用連結片41を介して吊上作業機により吊り上げて段積みすることにより、擁壁構築作業を効率良く行うことができる。
【０１８２】
また、魚巣用の擁壁ブロックA1は、下段のブロック本体１の前壁３と、上段に段積みしたブロック本体１の前壁３との間に位置する下段のブロック本体１の左・右側壁5,6間に、左右方向に伸延する四角形板状の胴込め材流出防止体42を介設している。46は、川岸K3の土が裏込め材Ｕ側に吸い出されるのを防止するための吸出防止マットである。
【０１８３】
このようにして、下段のブロック本体１の前壁３と、上段に段積みしたブロック本体１の前壁３との間に位置する下段のブロック本体１の左・右側壁5,6間に、胴込め材流出防止体42を介設することにより、下段のブロック本体１の上面開口部43の前後幅W4を短幅化することができて、かかる下段のブロック本体内に充填した胴込め材Ｄが上面開口部43から洗掘されて外部へ流出されるのを防止することができる。
【０１８４】
ここで、胴込め材Ｄは、擁壁構造体の一部を構成しているが、かかる胴込め材Ｄの洗掘・流出を、胴込め材流出防止体42を介設するだけで、簡単にかつ確実に防止することができて、護岸擁壁Ｙの強度を良好に確保することができる。
【０１８５】
また、かかる擁壁ブロックA1を段積みして護岸擁壁Ｙを構築した際には、水面下に位置するブロック本体１内に、上面開口部43を通して魚等が出入りすることができ、同魚等がブロック本体１内に充填した胴込め材Ｄの間隙中に卵を産み付ける等して、魚巣ブロックとしても機能させることができる。
【０１８６】
また、植生用の擁壁ブロックA2は、左・右側壁5,6の前部間に、左右方向に伸延する四角形板状の客土仕切体44（第２実施例としての擁壁ブロックＡの支持体７に相当する）を介設して、同客土仕切体44と前壁３と左・右側壁5,6とにより客土充填空間S1を形成し、同客土充填空間S1の底部に透水性を有する客土吸出防止シート24を張設すると共に、同客土吸出防止シート24の後部24aは、客土仕切体44の下方位置まで伸延させると共に、同客土仕切体44の背面に沿わせて上方へ伸延させている。
【０１８７】
このようにして、客土充填空間S1の底部に透水性を有する客土吸出防止シート24を張設することにより、ブロック本体１内に充填した胴込め材Ｄと、客土充填空間S1内に充填した客土Ｇとの間を、客土吸出防止シート24により仕切ることができる。
【０１８８】
従って、客土吸出防止シート24により粒径の小さい客土Ｇが、粒径の大きい胴込め材Ｄ側に吸い出される（流入する）のを防止することができる。
【０１８９】
この際、客土吸出防止シート24は、透水性を有するため、客土充填空間S1内に充填した客土Ｇの排水性を適度に確保することができて、植物の生育（植生）環境を良好に確保することができ、植生ブロックとして機能させることができる。
【０１９０】
また、かかる擁壁ブロックA1,A2を段積みして護岸擁壁Ｙを構築した際に、増水により客土充填空間S1内の客土Ｇが洗掘された場合にも、客土吸出防止シート24が胴込め材Ｄの上面を覆って、擁壁構造体の一部を構成する胴込め材Ｄが洗掘・流出されるのを防止することができる。
【０１９１】
ここで、下段のブロック本体１内に充填した胴込め材Ｄが洗掘・流出されると、その直上方に段積みした上・下面開口のブロック本体１内の胴込め材Ｄが、下段のブロック本体１内に落下し、さらに、その落下した胴込め材Ｄも洗掘・流出されると、最終的に上方に段積みした上・下面開口の全てのブロック本体１内の胴込め材Ｄが洗掘・流出されるという結果に至ることも考えられ、その場合には、護岸擁壁Yが崩壊するおそれもあるが、本実施例では、前記したように擁壁構造体の一部を構成する胴込め材Ｄが洗掘・流出されるのを防止することができるため、護岸擁壁Ｙの強度を良好に確保することができる。
【０１９２】
そして、客土吸出防止シート24の後部24aは、客土仕切体44の下方位置まで伸延させると共に、同客土仕切体44の背面に沿わせて上方へ伸延させているため、同客土吸出防止シート24の後部24aを客土仕切体44により上方から押圧して固定すると共に、同客土仕切体44の背後に充填した胴込め材Ｄにより押圧して固定することができて、同客土吸出防止シート24の前記胴込め材流出防止機能と客土吸い出し防止機能を良好に確保することができる。
【０１９３】
さらには、前壁３と客土仕切体44との間には、前後方向に伸延する四角形板状のシート押さえ体45を介設して、同シート押さえ体45により客土吸出防止シート24を上方から押さえるようにしている。
【０１９４】
ここで、客土仕切体44の前面には、上方と前方が開口する複数（本実施例では３個）の押さえ体受け用凹部44a,44a,44aを左右方向に間隔を開けて形成し、各押さえ体受け用凹部44a,44a,44aに各シート押さえ体45,45,45の後端部を嵌合させて配置しており、各シート押さえ体45は、客土仕切体44の背後に充填される胴込め材Ｄにより加圧されて、同客土仕切体44と前壁３との間で挟圧された状態で固定される。
【０１９５】
このようにして、客土仕切体44と前壁３との間で挟圧された状態で固定されたシート押さえ体45により、客土吸出防止シート24を上方から押さえることができて、同客土吸出防止シート24を張設状態に安定保持させることができ、その結果、客土吸出防止シート24による胴込め材流出防止機能と客土吸い出し防止機能とをより一層良好に確保することができる。
【０１９６】
また、客土仕切体44と胴込め材流出防止体42は、同一形状に形成して共通化している。
【０１９７】
このようにして、客土仕切体44と胴込め材流出防止体42を共通化することにより、施工性を向上させることができると共に、客土仕切体44と胴込め材流出防止体42の製造コストを低減させることができる。
【０１９８】
次に、基礎ブロックＢと魚巣用の擁壁ブロックA1と植生用の擁壁ブロックA2について、それぞれ図３９〜図４１を参照しながら具体的に説明する。
【０１９９】
すなわち、基礎ブロックＢは、図３９に示すように、第１実施例の基礎ブロックＢと基本的構造を同じくしており、ブロック本体20を前・後壁47,48と左・右側壁49,50とから上・下面開口の筒状に形成し、左・右側壁49,50の前部外側面に、左右間隔保持片としての接合部51,52を外側方へ膨出させかつ上下方向に伸延させて形成している。ここで、図３９の(a)は平面図、(b)は背面図、(c)は左側面図、(d)は右側面図、及び、(e)は断面側面図である。
【０２００】
そして、左側の接合部51には、上下方向に伸延しかつ断面半円弧状の接合用凹条部51aを形成する一方、右側の接合部52には、上下方向に伸延しかつ断面半円弧状の接合用突条部52aを形成している。
【０２０１】
また、ブロック本体20の前後左右側の四つの隅部には、それぞれ内方へ膨出する膨出部53,53,54,54を形成して、左右側前部と左側後部の膨出部53,53,54の近傍の天端面に略垂直下方向に伸延する差込孔11,11,11を形成し、左側前部の差込孔11中に滑動防止片２（図２４参照）の下部を差し込み可能とし、また、右側前部の差込孔11中に滑動防止片2と吊上用連結片41（図３８参照）のいずれかの下部を選択的に差し込み可能とし、また、左側後部の差込孔11中に吊上用連結片41の下部を差し込み可能としている。
【０２０２】
さらに、基礎ブロックＢの前後重心位置Gxと上下重心位置Gyとが交差する左・右側壁49,50上の交差部ないしはその近傍に、左右方向に略水平に伸延するブロック反転用支点凹部55,55を形成している。
【０２０３】
このようにして、基礎ブロックＢのブロック本体20を脱型する際には、型枠（図示せず）の上面部を取り外すと共に、左右側面部を外側方へ回動させて傾斜姿勢となし、同状態にて、左右側のブロック反転用支点凹部55,55中に反転用支軸（図示せず）をそれぞれ挿通し、両反転用支軸を介してブロック本体20を吊上装置（図示せず）により吊り上げることにより、型枠からブロック本体20を容易に取り出すことができる。
【０２０４】
そして、型枠内にて上下逆さ状態に成形したブロック本体20は、脱型時に吊り上げた状態にて、左右の反転用支軸を中心に人力により上下反転させ、その後、吊上装置により所定の載置場所に載置することができる。
【０２０５】
この際、ブロック反転用支点凹部55,55は、ブロック本体20の前後重心位置Gxと上下重心位置Gyとが交差する左・右側壁49,50上の交差部に、左右方向に略水平に伸延させて形成しているため、同ブロック本体20を吊上装置により吊り上げる作業を円滑に行うことができると共に、人力により上下反転させる作業を楽にかつ円滑に行うことができる。
【０２０６】
魚巣用の擁壁ブロックA1は、図４０に示すように、第１実施例としての擁壁ブロックＡと基本的構造を同じくしているが、左・右側壁5,6の後側上部を段付き凹状に形成すると共に、後部に後部重量軽減用開口部56,57を形成して、側面視にて左右の接合部9,10内に、前後重心位置Gxと上下重心位置Gyとが交差する交差部を配置し、同交差部ないしはその近傍に左右方向に略水平に伸延するブロック反転用支点凹部17,18を形成している点で異なる。ここで、図４０の(a)は平面図、(b)は背面図、(c)は左側面図、(d)は右側面図、及び、(e)は断面側面図である。
【０２０７】
そして、接合部9,10の前後幅W1は、
W2／２≧Ｗ１≧H1×Ｎ×0.1
の関係を満足するようにしている。ここで、W2はブロック本体１の前後幅、H1は前壁３の高さ、Ｎは法勾配（分）である。
【０２０８】
このようにして、魚巣用の擁壁ブロックA1のブロック本体１を脱型する際には、型枠（図示せず）の上面部を取り外すと共に、左右側面部を外側方へ回動させて傾斜姿勢となし、同状態にて、左右側のブロック反転用支点凹部17,18中に反転用支軸（図示せず）をそれぞれ挿通し、両反転用支軸を介してブロック本体１を吊上装置（図示せず）により吊り上げることにより、型枠からブロック本体１を容易に取り出すことができる。
【０２０９】
そして、型枠内にて上下逆さ状態に成形したブロック本体１は、脱型時に吊り上げた状態にて、左右の反転用支軸を中心に人力により上下反転させ、その後、吊上装置により所定の載置場所に載置することができる。
【０２１０】
この際、ブロック反転用支点凹部17,18は、ブロック本体１の前後重心位置Gxと上下重心位置Gyとが交差する接合部9,10上の交差部ないしはその近傍に、左右方向に略水平に伸延させて形成しているため、同ブロック本体１を吊上装置により吊り上げる作業を円滑に行うことができると共に、人力により上下反転させる作業を楽にかつ円滑に行うことができる。
【０２１１】
しかも、接合部9,10上に形成したブロック反転用支点凹部17,18中に反転用支軸を挿通するようにしているため、型枠の左右側面部を外側方へ回動させて傾斜姿勢となした状態でブロック本体1を吊り上げることができ、型枠の左右側面部を外側方へ90度近く回動させる必要性がないことから、後続の型枠組立作業、さらには、ブロック本体１の製造作業の能率を向上させることができる。
【０２１２】
また、ブロック反転用支点凹部17,18の周囲は、前壁３と直交する鉛直面となる凹部面58,59を形成している。
【０２１３】
しかも、ブロック本体１の左・右側壁5,6の内面に、それぞれ上方と内側方が開口する流出防止体受け用凹部5f,6fを形成して、図３５及び図３６に示すように、両流出防止体受け用凹部5f,6fに前記した胴込め材流出防止体42の左右側端部を嵌合させることにより、同胴込め材流出防止体42を下段のブロック本体１の前壁３と、上段に段積みしたブロック本体１の前壁３との間に位置させて横架状に介設している。
【０２１４】
ここで、下段のブロック本体１の前壁３と胴込め材流出防止体42との間隔、ないしは、同胴込め材流出防止体42と上段のブロック本体１の前壁３との間隔は、少なくともブロック本体１内に充填された胴込め材Ｄの最大粒径よりも小さくなるように設定して、同胴込め材Ｄの洗掘・流出を防止することができるようにしている。
【０２１５】
さらには、前壁３の左右側部には、それぞれ魚等出入り用開口部60,60を形成して、各魚等出入り用開口部60,60を通してブロック本体１内に魚等が出入りすることができるようにして、擁壁ブロックA1が魚巣ブロックとして機能するようにしている。
【０２１６】
植生用の擁壁ブロックA2は、図４１に示すように、基本的構造を前記した魚巣用の擁壁ブロックA1と同じくしているが、ブロック本体１の左・右側壁5,6の内面に、流出防止体受け用凹部5f,6fに代えてそれぞれ上方と内側方が開口する仕切体受け用凹部5g,6gを形成し、また、前壁３には魚等出入り用開口部60,60を形成していない点において異なる。ここで、図４１の(a)は平面図、(b)は背面図、(c)は左側面図、(d)は右側面図、及び、(e)は断面側面図である。
【０２１７】
そして、左・右側壁5,6の内面に形成した仕切体受け用凹部5g,6gには、前記した客土仕切体44（第２実施例としての擁壁ブロックＡの支持体７に相当する）の左右側端部を嵌合させることにより、横架状に介設している。
【０２１８】
また、図３５及び図３６に示すように、上段のブロック本体1は、その前壁３が下段のブロック本体１に設けた客土仕切体44の直上方位置に配置されるようにしている。
【０２１９】
ここで、上段のブロック本体1は、その前壁３が下段のブロック本体１に設けた客土仕切体44よりも前方位置ないしは後方位置に位置するように配置することもできるが、その前壁３と客土仕切体44との間隔は、少なくともブロック本体１内に充填された胴込め材Ｄの最大粒径よりも小さくなるように設定して、上・下段のブロック本体1,1内に充填された胴込め材Ｄが洗掘・流出されることがないようにしている。
【０２２０】
なお、植生用の擁壁ブロックA2も、前記した魚巣用の擁壁ブロックA1と同様に、ブロック本体1を型枠により成形すると共に、脱型することができる。
【０２２１】
図４２は、客土吸出防止シート24の後端部24aの配設位置の変容例であり、同後端部24aは、客土仕切体44の下方位置に配置して、同客土仕切体44により客土吸出防止シート24の後端部24aを上方から押圧して固定するようにしている。
【０２２２】
そして、客土吸出防止シート24の前端部24bは、前壁３の背面（後面）に沿わせて上方へ伸延させて、同前端部24bに客土Ｇの土圧が作用するようにして、客土吸出防止シート24が後方へ引張されて位置ずれするのを防止している。
【０２２３】
図４３は、客土吸出防止シート24の後端部24aの配設位置のもう一つの変容例であり、同後端部24aは、客土仕切体44よりも後方位置まで略水平に伸延させて、同後端部24aを胴込め材Ｄにより上下方向から挟圧して固定するようにしている。
【０２２４】
そして、客土吸出防止シート24の前端部24bは、前壁３の背面（後面）に沿わせて上方へ伸延させて、同前端部24bに客土Ｇの土圧が作用するようにして、客土吸出防止シート24が後方へ位置ずれするのを防止している。
【０２２５】
また、図３５〜図３７に示す客土吸出防止シート24においても、前端部24bを、前壁３の背面（後面）に沿わせて上方へ伸延させて、同前端部24bに客土Ｇの土圧が作用するようにして、客土吸出防止シート24が後方へ位置ずれするのを防止することもできる。
【０２２６】
なお、本実施例において使用する滑動防止片２としては、図４、図２４又は図２５に示すいずれかの形態のものを適宜選択して使用することができる。
【０２２７】
また、本実施例では、上・下面開口のブロック本体１について説明してきたが、上面開口で有底（下面が開口していない）のブロック本体１についても適用することができ、この場合も胴込め材Ｄの洗掘・流出を確実に防止することができる。
【０２３４】
【発明の効果】
（１）請求項１記載の本発明では、前・後壁と左・右側壁とから少なくとも上面開口に形成したブロック本体を具備する擁壁ブロックにおいて、左・右側壁の前部間に客土仕切体を介設して、同客土仕切体と前壁と左・右側壁とにより客土充填空間を形成し、同客土充填空間の底部に透水性を有する客土吸出防止シートを張設すると共に、同客土吸出防止シートの後部は、客土仕切体の下方位置まで伸延させ、前壁と客土仕切体との間にはシート押さえ体を介設して、同シート押さえ体により客土吸出防止シートを上方から押さえるようにしている。
【０２３５】
このようにして、客土吸出防止シートをシート押さえ体により上方から押さえることにより、同客土吸出防止シートを張設状態に安定保持させることができて、同客土吸出防止シートによる胴込め材流出防止機能と客土吸い出し防止機能とをより一層良好に確保することができる。
すなわち、客土吸い出し防止機能としては、客土吸出防止シートにより粒径の小さい客土が、粒径の大きい胴込め材側に吸い出される（流入する）のを防止することができる。
この際、客土吸出防止シートは、透水性を有するため、客土充填空間内に充填した客土の排水性を適度に確保することができて、植物の生育（植生）環境を良好に確保することができ、植生ブロックとして機能させることができる。
また、胴込め材流出防止機能としては、擁壁ブロックを段積みして護岸擁壁を構築した際に、増水により客土充填空間内の客土が洗掘された場合にも、客土吸出防止シートが胴込め材の上面を覆って、擁壁構造体の一部を構成する胴込め材が洗掘されるのを防止することができる。その結果、護岸擁壁の強度を良好に確保することができる。
【０２３６】
（２）請求項２記載の本発明では、前・後壁と左・右側壁とから少なくとも上面開口に形成したブロック本体を段積みした擁壁構造において、下段のブロック本体の前壁と、上段に段積みしたブロック本体の前壁との間に位置する下段のブロック本体の左・右側壁間に、胴込め材流出防止体を介設している。
【０２３７】
このようにして、下段のブロック本体の前壁と、上段に段積みしたブロック本体の前壁との間に位置する下段のブロック本体の左・右側壁間に、胴込め材流出防止体を介設することにより、下段のブロック本体の上面開口部の前後幅を短幅化することができて、かかる下段のブロック本体内に充填した胴込め材が上面開口部から洗掘されて外部へ流出されるのを防止することができる。
【０２３８】
ここで、胴込め材は、擁壁構造体の一部を構成しているが、かかる胴込め材の洗掘・流出を、胴込め材流出防止体を介設するだけで、簡単にかつ確実に防止することができて、護岸擁壁の強度を良好に確保することができる。
【０２３９】
また、かかる擁壁ブロックを段積みして護岸擁壁を構築した際には、水面下に位置するブロック本体内に、上面開口部を通して魚等が出入りすることができ、同魚等がブロック本体内に充填した胴込め材の間隙中に卵を産み付ける等して、魚巣ブロックとしても機能させることができる。
【０２４０】
ここで、かかる擁壁ブロックでは、胴込め材流出防止体を設けることにより、胴込め材の洗掘・流出を防止すると共に、ブロック本体内に積極的に魚巣用の空間を形成することができて、魚巣ブロックとしての機能を良好に確保することができる。
【図面の簡単な説明】
【図１】本発明に係る第１実施例としての擁壁ブロックを段積みして構築した擁壁の断面側面図（直線施工）。
【図２】本発明に係る第１実施例としての擁壁ブロックを段積みして構築した擁壁の断面側面図（曲線施工）。
【図３】同擁壁ブロックの平面図。
【図４】同擁壁ブロックの断面側面説明図。
【図５】鉛直荷重受け片上に荷重として作用する裏込め材の説明図。
【図６】直線状に段積み配置した擁壁ブロックの説明図。
【図７】前方へ凸状に湾曲させて段積み配置した擁壁ブロックの説明図。
【図８】後方へ凸状に湾曲させて段積み配置した擁壁ブロックの説明図。
【図９】本発明に係る第２実施例としての擁壁ブロックを段積みして構築した擁壁の断面側面図。
【図１０】同擁壁ブロックの左側面図。
【図１１】同擁壁ブロックの右側面図。
【図１２】同擁壁ブロックの断面側面説明図。
【図１３】ブロック本体の平面図。
【図１４】ブロック本体の背面図。
【図１５】擁壁ブロックの平面説明図。
【図１６】擁壁ブロックの背面説明図。
【図１７】支持体の平面図。
【図１８】同支持体の背面図。
【図１９】図１８のI-I線断面図。
【図２０】図１８のII-II線断面図。
【図２１】図１８のIII-III線断面図。
【図２２】擁壁ブロック段積み状態の断面側面説明図。
【図２３】滑動防止片の斜視説明図。
【図２４】他実施例としての滑動防止片の斜視図。
【図２５】もう一つの他の実施例としての滑動防止片の斜視図。
【図２６】擁壁ブロックの平面説明図。
【図２７】リフト挿通部の説明図。
【図２８】接合部の説明図。
【図２９】接合部の説明図。
【図３０】変容例としてのブロック本体の平面説明図。
【図３１】第２実施例としての段積み工法の平面説明図。
【図３２】第３実施例としての段積み工法の平面説明図。
【図３３】第４実施例としての段積み工法の平面説明図。
【図３４】第５実施例としての段積み工法の平面説明図。
【図３５】第６実施例としての擁壁ブロックを段積みして構築した護岸擁壁の断面側面図。
【図３６】同護岸擁壁の部分拡大断面側面図。
【図３７】同護岸擁壁の部分拡大平面図。
【図３８】吊上用連結片の正面図。
【図３９】基礎ブロックの説明図。
【図４０】魚巣用の擁壁ブロックの説明図。
【図４１】植生用の擁壁ブロックの説明図。
【図４２】客土吸出防止シートの変容例を示す断面側面図。
【図４３】同客土吸出防止シートのもう一つの変容例を示す断面側面図。
【符号の説明】
Ａ 擁壁ブロック
Ｙ 擁壁
１ ブロック本体
２ 滑動防止片[0001]
BACKGROUND OF THE INVENTION
  The present invention is a retaining wall block.And retaining wall structureAbout.
[0002]
[Prior art]
Conventionally, as one form of retaining wall block, it has a block body formed in the upper and lower openings from the front and rear walls and the left and right walls, and the left and right walls have a stepped concave shape on the upper rear side. A stepped portion is formed between the front top end surface and the rear top end surface, and a partition plate is disposed on the stepped portion, and a land filling space is formed by the partition plate, the front wall, and the left and right side walls. In addition, there is one in which a bottom plate is arranged at the bottom of the customer soil filling space (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
JP-A-8-120893
[0004]
[Problems to be solved by the invention]
However, in the retaining wall block described above, since the bottom plate is arranged at the bottom of the customer soil filling space, it is possible to prevent the customer soil from being sucked out (flowed out) to the loading material side filled below. However, there is a problem that the drainage of the soil is worse and the plant does not grow on the soil.
[0005]
In addition, when a revetment retaining wall is constructed using the retaining wall block described above, the infill material that forms part of the retaining wall structure filled in the retaining wall block must be scoured and discharged. As a result, the strength of the revetment retaining wall cannot be maintained.
[0006]
[Means for Solving the Problems]
  Therefore, in the present invention,In a retaining wall block with a block body formed at least on the top surface from the front and rear walls and the left and right walls, a customer soil partition is provided between the front parts of the left and right walls, The body, the front wall, and the left and right walls form a soil filling space, and a permeable soil suction prevention sheet is stretched at the bottom of the soil filling space, and the rear portion of the soil suction prevention sheet. Is extended to the lower position of the customer partition,A sheet pressing body is interposed between the front wall and the customer soil partition body, and the customer soil suction prevention sheet is pressed from above by the sheet pressing body.HoldingA wall block is provided.
[0007]
  The present invention also provides a block main body formed at least on the upper surface opening from the front and rear walls and the left and right walls.Stacked retaining wall structureIn the above, the body material leakage prevention body is interposed between the left and right side walls of the lower block body located between the front wall of the lower block body and the front wall of the block body stacked in the upper stage. Retaining wall featuringConstructionAlso has features.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
[0012]
That is, the retaining wall block according to the present invention includes a block body formed at least on the upper surface opening from the front / rear wall and the left / right side wall, and a guest soil partition between the front parts of the left / right side wall. A customer soil filling space is formed by the customer soil partitioning body, the front wall, and the left and right walls, and a water permeable soil suction prevention sheet is stretched at the bottom of the customer soil filling space. The rear part of the customer soil suction prevention sheet is extended to a position below the customer soil partition.
[0013]
In addition, a sheet pressing body is interposed between the front wall and the customer soil partition, and the customer soil suction preventing sheet is pressed from above by the sheet pressing body.
[0014]
In addition, an inflow prevention material is inserted between the left and right side walls of the lower block body located between the front wall of the lower block body and the front wall of the block body stacked in the upper stage. Yes.
[0015]
And the customer soil partition and the trunking material outflow prevention body are formed in the same shape and shared.
[0016]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0017]
[Retaining wall block as the first embodiment]
A shown in FIGS. 1 to 5 is a retaining wall block as a first embodiment according to the present invention, and the retaining wall block A is attached to the block body 1 and the block body 1 so as to protrude upward. The prevention piece 2 is provided.
[0018]
As shown in FIGS. 1 to 5, the block main body 1 is formed in a cylindrical shape having upper and lower surface openings from the front and rear walls 3 and 4 and the left and right walls 5 and 6. A support body 7 extending in the left-right direction is laid between the middle portions of the left and right walls 5 and 6, and a plurality of (two in this embodiment) are provided between the support body 7 and the front wall 3 of the block body 1. ) Are positioned so as to be movable in the left-right direction.
[0019]
The left and right side walls 5 and 6 are formed in a stepped concave shape at the rear upper part, and the front half parts 5a and 6a are formed at the same height as the front wall 3, while the rear half parts 5b and 6b are the same as the rear wall 4. The rear wall 4 is formed to be approximately half the height of the front wall 3, and the front top end faces 5d, 6d of the front half portions 5a, 6a and the rear top end face 5e of the rear half portions 5b, 6b are formed. , 6e is formed.
[0020]
In this way, the block body 1 is made compact and lightweight.
[0021]
Moreover, on the outer surfaces of the front half portions 5a, 6a of the left and right walls 5, 6, the joint portions 9, 10 as the left and right spacing holding pieces are bulged outwardly and extended in the vertical direction. The left joining portion 9 is formed with a joining groove 9a extending in the vertical direction and having a semicircular cross section, and tapered surfaces 9b and 9c are formed on the front and rear sides of the joining groove 9a, respectively. On the other hand, the right joining portion 10 is formed with joining ridges 10a extending in the vertical direction and having a semicircular cross section, and tapered surfaces 10b, 10c on the front and rear sides of the joining ridges 10a, respectively. Is forming.
[0022]
In this way, the plurality of block bodies 1, 1 can be arranged in a connected state on substantially the same straight line extending in the left-right direction, as shown in FIG. The joining ridge 10a and the joining recess 9a of the right block body 1 are fitted.
[0023]
As shown in FIG. 7, the plurality of block bodies 1, 1 can be arranged in a circular arc shape that curves forward and can be connected in the left-right direction. Since the rear tapered surfaces 9c and 10c are formed in 1, the radius of curvature can be set small until both the tapered surfaces 9c and 10c come into contact with each other, so that the block main bodies 1 and 1 do not interfere with each other. Curve construction can be performed.
[0024]
Further, as shown in FIG. 8, the plurality of block bodies 1, 1 can be arranged in a circular arc shape that curves backward and can be connected in the left-right direction. Since the front taper surfaces 9b and 10b are formed in 1, the radius of curvature can be set small until both the taper surfaces 9b and 10b come into contact with each other. Construction can be performed.
[0025]
Further, as shown in FIG. 3, the front top end faces 5d, 6d of the left and right walls 5, 6 and the top end faces 9d, 10d of the joints 9, 10 are substantially flush with the top end face 3c of the front wall 3. The block upper surfaces 13 and 14 are formed, and the upper block main body 1 is placed on the block upper surfaces 13 and 14.
[0026]
Also, at least one of the front top end surfaces 5d, 6d of the left and right walls 5, 6 and the top end surfaces 9d, 10d of the joints 9, 10 is substantially flush with the top end surface 3c of the front wall 3. The block mounting surfaces 13 and 14 can also be formed.
[0027]
Insertion holes 11 and 11 are formed in the top end surfaces 9d and 10d of the left and right joints 9 and 10, respectively, and rod-like anti-skid pieces 2 extending vertically in the insertion holes 11 and 11, respectively. 2 by inserting the lower part of 2 and projecting upward from the top end faces 9d and 10d of both joints 9 and 10 so that the front of the block body 1 is stacked just above the block body 1 by the anti-sliding pieces 2 and 2 To prevent sliding. The insertion hole 11 can also be used as a connection hole when the block body 1 is lifted.
[0028]
Further, as shown in FIGS. 3 and 4, support receiving recesses 5c and 6c are formed on the inner side surfaces of the front half portions 5a and 6a of the left and right walls 5 and 6 so as to face each other in the left-right direction. Each of the support receiving recesses 5c and 6c is formed in a stepped recess shape in which the upper side, the inner side, and the rear side are opened.
[0029]
A support 7 extending in the left-right direction is detachably mounted between the support-receiving recesses 5c, 6c facing in the left-right direction, and the support 7 has left and right end portions for receiving each support. The recesses 5c and 6c are fitted, and the support body receiving recesses 5c and 6c regulate the forward and downward movement of the support body 7.
[0030]
The support receiving recesses 5c and 6c may be restricted not only forward and downward, but also backward movement.
[0031]
In addition, the support 7 is formed in a rectangular shape in cross section and forms a stepped concave rear receiving portion 7a extending in the left-right direction at the upper part of the front surface, while the rear surface upper part of the front wall 3 of the block body 1 is A stepped concave front receiving portion 3a extending in the direction is formed so as to face the stepped concave rear receiving portion 7a in the front-rear direction, and a left-right positioning body between the stepped concave front and rear receiving portions 3a, 7a. 8 and 8 are slidably mounted in the left-right direction so that the position can be adjusted in the left-right direction.
[0032]
Here, a front soil filling space S1 is formed by the front wall 3, left and right side walls 5, 6 of the block body 1 and the support body 7, and as shown in FIGS. 1 and 2, the same soil filling space S1 is formed. By filling the soil for vegetation G inside, a plant (not shown) can be vegetated on the soil G.
[0033]
The left-right direction positioning body 8 is formed in a substantially U-shaped cross section from a bottom plate 8a extending in the front-rear direction and side walls 8b, 8b formed by rising upward from the left and right side edges of the bottom plate 8a. A fixing material filling space S2 in which the upper surface and the front and rear surfaces are open is formed.
[0034]
Then, the fixing material filling space S2 is filled with a fixing material K such as mortar, and the rod-shaped anti-skid piece 2 extending in the vertical direction by the fixing material K is fixed to protrude upward.
[0035]
At this time, the anti-sliding piece 2 is arranged and fixed at an arbitrary position in the front-rear and left-right directions in the fixing material filling space S2 so as to be adjustable, and stacked on the block main body 1 just above the block main body 1. The sliding prevention piece 2 can prevent the sliding to the front.
[0036]
Further, as shown in FIGS. 1 to 5, a vertical load receiving piece 12 that receives a vertical load from the backfilling material U is integrally projected on the rear wall 4 of the block body 1.
[0037]
That is, the vertical load receiving piece 12 protrudes rearward from the lower rear portion of the rear wall 4 of the block body 1, and the vertical load receiving surface 12a is formed on the upper surface, and the rear projecting width of the vertical load receiving surface 12a The width w is formed to be about 2.0 times the vertical width h of the vertical load receiving piece 12 or shorter than that.
[0038]
Moreover, the vertical load receiving piece 12 has a rear surface 12b formed on an inclined surface substantially along the cut surface Jk of the natural ground J of the retaining wall construction site.
[0039]
In this way, as shown in FIGS. 1, 2 and 5, the upper rear ends of the rear walls 4, 4, 4 of the block bodies 1, 1, 1 stacked on the vertical load receiving piece 12 are arranged. From the backfill material U located between the upper imaginary line F1 to be connected and the lower imaginary line F2 to connect the upper rear ends of the vertical load receiving pieces 12, 12, 12 of the stacked block bodies 1,1,1 The back-filling material U is also placed on the lower block body 1 as a load of the block body 1, so that the back-filling material U on the vertical load receiving piece 12 is also slid. It can be calculated (counted) by being incorporated into the vertical load in the safety factor expression, and the sliding safety factor of the block body 1 can be efficiently increased.
[0040]
At this time, although the vertical load from the backfilling material U acts on the vertical load receiving surface 12a of the vertical load receiving piece 12, the vertical load receiving piece 12 is vertical due to the bending moment due to mechanical design. The bending and tensile stress of the load receiving piece 12 is sufficient for the bending and tensile allowable stress of concrete only. Therefore, the block main body can be manufactured easily and inexpensively without the need for reinforcing bars.
[0041]
Moreover, although the vertical load receiving piece 12 protrudes rearward from the rear wall 4 of the block main body 1, the rear face of the vertical load receiving piece 12 is substantially along the cut surface Jk. The cutting amount of the surface Jk can be reduced as much as possible, the sliding safety factor can be ensured appropriately, and the construction cost can be reduced.
[0042]
Further, B shown in FIGS. 1 and 2 is a basic block, and the basic block B includes a block main body 20 and a slide preventing piece 2 attached to the block main body 20 so as to protrude upward. The structure is the same as that of the block main body 1 of the retaining wall block A described above, but the height of the block main body 20 is approximately half the height of the block main body 1, and the front and rear width of the block main body 20 is the front and rear of the block main body 1. It differs in that it is formed slightly wider than the width. 21 is a front wall and 22 is a rear wall.
[0043]
Next, the stacking method as the first embodiment when the retaining wall Y is constructed by the retaining wall block A configured as described above will be described.
[0044]
[For straight construction]
(1) When linearly constructing the retaining wall Y in the left-right direction, the block body 20 of the foundation block B is laid linearly in the left-right direction as shown in FIGS.
[0045]
(2) The block body 20 is filled with a waist material D such as chestnut.
[0046]
(3) Insert the lower portions of the anti-sliding pieces 2 and 2 into the insertion holes 11 and 11 formed in the left and right side walls of the block main body 20, and attach the anti-skid pieces 2 and 2 to the left and right side walls of the block main body 20. It protrudes upward from the top end face.
[0047]
(4) On the block body 20, the block body 1 of the retaining wall block A is laid in a straight line in the left-right direction to form the first block row L1.
[0048]
At this time, each block body 1 places the front wall 3 on the left and right side walls, and the rear wall 4 on the rear wall 22 and the left and right side walls of the block body 20. The lower part of the front surface is brought into contact with the anti-skid pieces 2 and 2 projecting from the left and right walls of the block body 20 from the rear.
[0049]
(5) In each block main body 1, put inboard material D such as chestnut and further backfill material U to the height of the rear half parts 5 b and 6 b of the left and right side walls 5 and 6.
[0050]
(6) The body material D and the back material U are rolled by a rolling device (not shown).
[0051]
At this time, the left and right side walls 5 and 6 of the block main body 1 are in a state in which the rear half portions 5b and 6b are cut out to approximately half the height of the front half portions 5a and 6a. A space communicating in the left-right direction is formed on the upper surface of the backfilling material D and further the backfilling material U, and the operator can easily move the compaction device laterally through the space, so that the compaction work can be performed efficiently. It can be carried out.
[0052]
Even when the block main body 1 is enlarged, the operator can easily enter and exit the block main body 1 from the rear half of the left and right side walls 5 and 6.
[0053]
(7) The upper half upper part of each block main body 1 and the upper half of the upper half of each block main body 1 are filled with the body filling material D and further the back filling material U.
[0054]
(8) Insert the lower part of the anti-sliding pieces 2 and 2 into the insertion holes 11 and 11 formed in the left and right side walls 5 and 6 of the block main body 1, and connect the anti-skid pieces 2 and 2 to the left of the block main body 1. -It protrudes upward from the top end surface of the right side walls 5 and 6.
[0055]
(9) On the block body 1, separate block bodies 1 are laid in a straight line in the left-right direction to form a second block row L2.
[0056]
At this time, each block main body 1 places the front wall 3 on the left and right side walls 5 and 6 and the rear wall 4 on the backfill material U. The sliding prevention pieces 2 and 2 projecting from the left and right walls 5 and 6 of the main body 1 are brought into contact with the rear side.
[0057]
(10) Put the body material D such as chestnuts and the back material U into each block body 1 to the height of the rear half parts 5b and 6b of the left and right side walls 5 and 6.
[0058]
(11) The body-filling material D and the back-filling material U are rolled by a rolling device (not shown).
[0059]
(12) The upper half upper part of each block main body 1 and the upper half upper half space of each block main body 1 are filled with the body filling material D and further the back filling material U.
[0060]
(13) Insert the lower portions of the anti-skid pieces 2 and 2 into the insertion holes 11 and 11 formed in the left and right side walls 5 and 6 of the block main body 1, and attach the anti-skid pieces 2 and 2 to the left of the block main body 1. -It protrudes upward from the top end surface of the right side walls 5 and 6.
[0061]
(14) On the block body 1, separate block bodies 1 are laid in a straight line in the left-right direction to form a third block row L3.
[0062]
At this time, each block body 1 places the front wall 3 on the support 7 and the left and right side walls 5 and 6, and the rear wall 4 on the backfill material U. The lower part is brought into contact with the anti-skid pieces 2 and 2 projecting from the left and right walls 5 and 6 of the block body 1 from the rear.
[0063]
(15) The body material D such as chestnut and the back material U are inserted into each block body 1 to the lower end position of the support receiving recesses 5c and 6c.
[0064]
(16) A support body 7 is installed between a pair of left and right support body receiving recesses 5c, 6c, and the front side partitioned by the support body 7 is used as a customer soil filling space S1, and the customer soil is placed in the customer soil filling space S1. While filling G, the space on the rear side of the support 7 is filled with the body filling material D and further the back filling material U. 24 is an anti-soil evacuation sheet, and the anti-soil evacuation sheet 24 prevents the invasion of the terrestrial soil G into the containment material D. When it is washed out, the inflatable material D is prevented from being sucked out (outflowed) out of the block main body 1 by flowing river water.
[0065]
(17) The above operations (13) to (16) are repeated up to the required number of steps.
[0066]
In this way, the retaining wall Y can be linearly constructed, and the sliding prevention force 2 is applied to the lower block main body 1 by preventing the block main body 1 stacked in the upper stage by the anti-sliding piece 2. be able to. N is a rooting part formed by rooting soil up to the middle part of the second block row L2.
[0067]
In the present embodiment, the front wall 3 of the upper block body 1 is brought into contact with the anti-skid piece 2 in a state in which the anti-skid piece 2 is projected in advance on the left and right side walls 5 and 6. However, it is also possible to position the upper block body 1 first, and then to project the anti-sliding piece 2 on the left and right side walls 5 and 6 after that.
[0068]
[Curve construction]
(1) When laying the retaining wall Y in the left-right direction and curving in a convex shape forward (convex backward), as shown in FIGS. 2 and 7 (FIG. 8), the foundation block The B block body 20 is laid in a curved shape protruding forward (convex backward) according to conditions such as topography.
[0069]
(2) A body material D such as chestnut is placed in the block main body 20 to the lower end position of a support receiving recess (not shown), and is rolled by a rolling device (not shown).
[0070]
(3) The support body 7 is installed between a pair of left and right support body receiving recesses, the back space partitioned by the support body 7 is filled with the body material D, and the pressure is reduced by a rolling device.
[0071]
(4) Between the stepped concave rear receiving portion 7a formed on the support 7 and the stepped concave front receiving portion 3a formed on the upper rear surface of the front wall 3 of the block body 1 of the retaining wall block A, The direction positioning bodies 8 and 8 are slidably mounted in the left-right direction and temporarily placed.
[0072]
(5) On the block main body 20, the block main body 1 is curved in a forward convex shape (convex rearward) and laid, and each block main body 1 is positioned at a required position, and the first block row L1 Form.
[0073]
At this time, the row of block bodies 20 laid adjacent to each other in the left-right direction and the first block row L1 of the block body 1 laid next to each other in the left-right direction in a stacked state on each row Since the curvature radii of the rows are different from each other, the upper row is slightly displaced in the left-right direction with respect to the lower row, and as the row becomes longer, the lower surfaces of the left and right side portions of the upper block main body 1 become lower. In some cases, the block main body 20 may not be placed on two places on the top end surface of the left and right side walls.
[0074]
However, in such a case, in this embodiment, since the support body 7 is installed between the pair of left and right support body receiving recesses of the block body 20, the left and right sides of the upper block body 1 are supported by the support body 7. Any lower surface of the side portion can be reliably supported.
[0075]
Moreover, an operator can also work on the support body 7 as needed, and work efficiency can be improved.
[0076]
(6) The body material D such as chestnut and the back material U are inserted into each block body 1 up to the lower end position of the support receiving recesses 5c and 6c, and are rolled by a rolling device (not shown).
[0077]
At this time, the left and right side walls 5 and 6 of the block main body 1 are in a state in which the rear half portions 5b and 6b are cut out to approximately half the height of the front half portions 5a and 6a. A space communicating in the left-right direction is formed on the upper surface of the backfilling material D and further the backfilling material U, and the operator can easily move the compaction device laterally through the space, so that the compaction work can be performed efficiently. It can be carried out.
[0078]
Even when the block main body 1 is enlarged, the operator can easily enter and exit the block main body 1 from the rear half of the left and right side walls 5 and 6.
[0079]
(7) A support body 7 is installed between a pair of left and right support body receiving recesses 5c, 6c, and the back side material U and the backfill material U are filled in the rear space partitioned by the support body 7. Compressed by a rolling device.
[0080]
(8) Between the stepped concave rear receiving portion 7a formed on the support 7 and the stepped concave front receiving portion 3a formed on the upper rear surface of the front wall 3 of the block body 1, the left and right positioning bodies 8, 8 Is slidably mounted in the left-right direction and temporarily placed.
[0081]
(9) On the block main body 1, separate block main bodies 1 are laid in a curved shape protruding forward (convex backward), and each block main body 1 is positioned at a required position, A block row L2 is formed.
[0082]
At this time, the block row L1 of the block body 1 laid adjacently in the left-right direction and the second block row L2 of the block body 1 laid adjacently in the left-right direction in a stacked state on the block row L1 Since the curvature radii of the rows are different for each row, the upper row is slightly displaced in the left-right direction with respect to the lower row, and as the row becomes longer, the lower surfaces of the left and right side portions of the upper block body 1 are increased. However, there may be a problem that the block main body 1 in the lower tier does not rest on two places on the top end surface of the left and right side walls.
[0083]
However, in such a case, in this embodiment, since the support body 7 is constructed between the pair of left and right support body receiving recesses 5c, 6c of the block body 1, the upper block body is supported by the support body 7. Any one of the lower surfaces of the left and right side portions can be reliably supported.
[0084]
Moreover, an operator can also work on the support body 7 as needed, and work efficiency can be improved.
[0085]
(10) A body material D such as chestnut stone and further a back material U are placed in each block body 1 to the lower end position of the support receiving recesses 5c, 6c, and rolled by a rolling device (not shown).
[0086]
(11) A support body 7 is installed between a pair of left and right support body receiving recesses 5c, 6c, and the back side material U and the backfill material U are filled in the rear space partitioned by the support body 7. Compressed by a rolling device.
[0087]
(12) Between the stepped concave rear receiving portion 7a formed on the support 7 and the stepped concave front receiving portion 3a formed on the upper rear surface of the front wall 3 of the block body 1, the left and right positioning bodies 8, 8 Is slidably mounted in the left-right direction and temporarily placed.
[0088]
(13) On the block main body 1, separate block main bodies 1 are curved in a forward convex shape (convex rearward), and each block main body 1 is positioned at a required position. A block row L3 is formed.
[0089]
(14) In each block main body 1, a waist-filling material D such as chestnut and further a back-filling material U are put to the lower end positions of the support receiving recesses 5 c and 6 c and rolled by a rolling device (not shown).
[0090]
(15) A support body 7 is installed between a pair of left and right support body receiving recesses 5c, 6c, and the back side material U and the backfill material U are filled in the rear space partitioned by the support body 7. Compressed by a rolling device.
[0091]
(16) The front side partitioned by the support body 7 is used as the main soil filling space S1, and the main soil G is filled in the main soil filling space S1.
[0092]
(17) The above operations (13) to (16) are repeated up to the required number of steps.
[0093]
(18) The body material D is filled in the space on the side of the temporarily placed left and right positioning bodies 8 and 8, and the left and right positioning bodies 8 and 8 are positioned.
[0094]
At this time, since the left and right direction positioning bodies 8 and 8 are slidably installed in the left and right direction, the left and right direction positioning bodies 8 and 8 are placed at the required positions, that is, the anti-sliding piece 2 is attached to the front wall 3. It can be positioned and positioned at a position suitable for contacting the lower part of the front surface.
[0095]
(19) The right and left positioning bodies 8 and 8 are filled with the fixing materials K and K, respectively, and the lower portions of the anti-sliding pieces 2 and 2 are adjusted in the fixing materials K and K in the front-rear direction and / or the left-right direction. While positioning upwardly and fixing by fixing the fixing material K, the anti-sliding pieces 2 and 2 are brought into contact with the lower front portion of the front wall 3 of each block body 1 stacked immediately above.
[0096]
The positioning work of the left and right side positioning bodies 8 and 8 and the positioning work of the anti-sliding pieces 2 and 2 are performed by positioning the block row immediately above and placing it in each block body 1 forming the block row. D Furthermore, it can be performed immediately after the backfill material U is filled.
[0097]
In this way, the curved construction of the retaining wall Y convex forward (convex backward) can be performed, and by preventing the block body 1 stacked in the upper stage by the anti-sliding piece 2, the lower stage A sliding resistance force can be applied to the block main body 1.
[0098]
[Retaining wall block as the second embodiment]
9 to 16 show a retaining wall block A as a second embodiment, and the retaining wall block A has the same basic structure as the retaining wall block A as the first embodiment described above. However, the left and right side walls 5 and 6 are formed with lift insertion holes 15,15,16,16 and block reversal fulcrum recesses 17,18 as lift insertion portions so that they do not interfere with each other. 9 and 10 are greatly different in that they are formed in a stepped concave shape.
[0099]
That is, as shown in FIGS. 9 to 12 and FIG. 27 (a), a pair of front and rear lift insertion holes 15, 15, 16, 16 are formed in the left and right walls 5, 6 respectively. As shown in FIG. 27 (a), the front and rear lift insertion holes 15, 15, 16, and 16 are arranged so as to be positioned in front and rear of the front and rear center-of-gravity line C of the retaining wall block A, respectively. The left and right lift insertion holes 15 and 16 are aligned in the left-right direction, and at least opened to a size that allows a lift fork of a forklift (not shown) as a lift device to be inserted. Yes.
[0100]
In this way, the lift fork of the forklift is passed through the lift insertion holes 15, 15, 16, 16 from the side of the retaining wall block A, and the retaining wall block A is moved up and down by the lift fork in the same state. The stock in a factory etc. and the retaining wall block A at the time of shipment can be easily loaded and unloaded.
[0101]
At this time, the front and rear lift insertion holes 15, 15, 16, and 16 are arranged so as to be positioned in front and rear of the front and rear center-of-gravity line C of the retaining wall block A, respectively. The stability at the time of raising and lowering the block A can be ensured satisfactorily, and loading and unloading can be performed reliably.
[0102]
Moreover, the lift insertion holes 15, 15, 16, 16 are formed in such a size that a part of the casing material D filled in the block body 1 protrudes outward, so that the inside of the block body 1 The trunking material D and the backfilling material U filled outside the block main body 1 interfere with each other, and the sliding resistance in the front-rear direction of the block main body 1 can be increased.
[0103]
Furthermore, the weight of the block body 1 can be reduced by reducing the manufacturing cost by forming the lift insertion holes 15, 15, 16, 16 as large as possible while ensuring the strength of the block body 1. Simplification of construction can be achieved.
[0104]
Further, as shown in FIGS. 10 to 12, left and right side walls 5 and 6 are formed with block reversal fulcrum recesses 17 and 18, respectively. It is arranged on the front and rear center-of-gravity line C of A or in the vicinity thereof.
[0105]
In this way, a pair of left and right fulcrum pins (shown in the figure) in which the block body 1 formed with the top and bottom (upper and lower sides) turned upside down in a mold (not shown) is inserted into both block reversal fulcrum recesses 17 and 18. (Not shown) can be easily reversed.
[0106]
Moreover, both block reversal fulcrum recesses 17 and 18 can also be used as connection holes when the block body 1 is lifted.
[0107]
In the retaining wall block A according to the present embodiment, as shown in FIGS. 10 and 11, the front lift insertion holes 15 and 16 and the block reversal fulcrum recesses 17 and 18 are formed as described above. Therefore, stepped recesses 9e, 10e for opening through holes and stepped recesses 9f, 10f for opening fulcrum recesses are formed at the center lower part and rear part of the joints 9, 10, respectively.
[0108]
That is, the stepped recesses 9e and 10e for opening the insertion holes are arranged so that the central lower part of the joints 9 and 10 is aligned with the front edge portions 15a and 16a and the upper edge portions 15b and 16b of the front lift insertion holes 15 and 16. By cutting out like a bowl, a stepped recess is formed, and the sides of the front lift insertion holes 15 and 16 are opened.
[0109]
The stepped recesses 9f, 10f for opening the fulcrum recesses are stepped by cutting the rear center part of the joints 9, 10 in a hook shape immediately before and immediately above the block reversal fulcrum recesses 17, 18. A recess is formed to open the sides of the block inversion fulcrum recesses 17 and 18.
[0110]
In addition, the lower joint portion 9a of the joining concave portion 9a is extended to the position just above the insertion hole opening stepped concave portion 9e, while the right joining portion 10 has the joining convex portion 10a. The lower end is extended to a position immediately above the stepped recess 10e for opening the insertion hole.
[0111]
In this way, the side of the front lifting insertion holes 15 and 16 and the side of the stepped recesses 9f and 10f for opening the fulcrum recesses are secured while the function as the left and right spacing holding pieces by the joints 9 and 10 is well secured. The stepped recesses 9e and 10e for opening the insertion holes and the stepped recesses 9f and 10f for opening the fulcrum recesses are formed so that the opening can be opened respectively. The function of the stepped recesses 9f and 10f can be ensured satisfactorily, and the weight of the block main body 1 can be reduced from this point as well, so that the manufacturing cost can be reduced and the construction can be simplified.
[0112]
Further, in the retaining wall block A according to the present embodiment as well, as in the retaining wall block A according to the first embodiment, the support body 7 is formed in a vertically long cross section as shown in FIGS. A stepped concave rear receiving portion 7a extending in the left-right direction is formed on the front upper portion, while a stepped concave front receiving portion 3a extending in the left-right direction is formed on the rear surface upper portion of the front wall 3 of the block body 1 as described above. The left and right positioning bodies 8 and 8 are slidably mounted in the left and right direction between the concave front and rear receiving portions 3a and 7a. , The position can be adjusted in the left-right direction.
[0113]
And since the right-and-left direction positioning bodies 8 and 8 are interposed between the front wall 3 of the block body 1 and the support body 7, when the pressure by the waist material D acts on the support body 7 from the back In addition, the support 7 is reinforced so that it can resist such pressure.
[0114]
Here, as shown in FIGS. 22 and 23, the left-right positioning body 8 is formed in a block shape having a quadrangular section extending in the front-rear direction, and the rear surface is substantially vertical on the upper surface of the left-right positioning body 8. The protruding strip is integrally formed, and the protruding strip is formed as the anti-sliding strip 2.
[0115]
When a gap is formed between the rear surface 2a of the anti-sliding piece 2 and the front lower portion of the front wall 3 of the block body 1 stacked in the upper stage, a filler m such as mortar is filled in the gap. It is solidified to prevent the block main body 1 placed on the upper stage by the anti-sliding piece 2 through the filler m from sliding forward.
[0116]
Further, as shown in FIGS. 9 and 24, the anti-sliding piece 2 to be inserted into the insertion hole 11 formed on the top end face of the joints 9 and 10 is extended in the vertical direction so that the lower part is inserted into the insertion hole 11. It is formed from a rod-like support piece 2b formed so as to be able to be inserted into the wall, and a front wall abutting plate-like piece 2c attached to the upper part of the rod-like support piece 2b in an intersecting manner.
[0117]
In this way, the front wall abutting plate-like piece 2c of the anti-sliding piece 2 is brought into contact with the front wall 3 of the block body 1 placed on the upper stage, and the front wall abutting plate-like piece 2c is brought into contact with the front wall 3 The front lower part of the wall 3 is received by the surface.
[0118]
At this time, if the front lower portion of the front wall 3 of the block body 1 is in contact with the front wall contact plate-like piece 2c, the block body 1 may be displaced in the left-right direction.
[0119]
FIG. 25 shows a non-sliding piece 2 as another embodiment. A hexagonal front wall abutting piece 2d in plan view is provided on the upper part of the rod-like support piece 2b, and the front wall abutting piece 2d is provided. Six side surfaces 2e are formed around the periphery.
[0120]
In this way, the front lower portion of the front wall 3 of the block body 1 placed on the upper surface is formed by any one of the six side surfaces 2e formed around the front wall contact piece 2d. I try to receive it.
[0121]
In a stable calculation, even when the anti-sliding piece 2 is not required, there is a risk of sliding forward of the block body 1 when the backfilling material U such as embankment or the rolling material D is rolled. If the sliding prevention piece 2 is appropriately used to prevent the sliding, it can function effectively for compaction by rolling of the backfilling material U, the trunking material D, and the like.
[0122]
In addition, a plurality (four in this embodiment) of rear engagement recesses 7b are formed on the front surface of the support body 7 at intervals in the left-right direction, and each rear engagement recess 7b is stepped. The concave rear side receiving portion 7a communicates downward to form a concave shape.
[0123]
On the other hand, on the upper rear surface of the front wall 3 of the block body 1, a plurality (four in this embodiment) of front engagement recesses 3b are spaced in the left-right direction, and the rear engagement recesses 7b are arranged in the front-rear direction. Each of the front engaging recesses 3b is formed in a concave shape so as to communicate with the lower side of the stepped concave front receiving part 3a.
[0124]
In this way, the sheet presser 30 formed by extending in the front-rear direction is disposed between the front and rear engaging recesses 3b, 7b facing in the front-rear direction, and the soil is prevented from being sucked out by the sheet presser 30. The sheet 24 is pressed from above so that the same soil suction prevention sheet 24 does not turn up.
[0125]
Here, the customer soil suction prevention sheet 24 is stretched over the customer soil filling space S1 and a space formed behind the customer soil filling space S1 via the support 7, and the customer soil suction prevention sheet 24 is provided. The portion located in 24 of the soil filling space S1 is pressed from above by the sheet presser 30 described above, while the portion located in the space formed via the support body 7 behind the soil filling space S1 Is pushed from above by the stuffing material D to securely fix the soil suction prevention sheet 24.
[0126]
Further, as shown in FIGS. 13 to 16 and FIG. 26, engagement concave portions 31 and 32 opened upward and inward are formed on the inner surfaces of the top end portions of the front half portions 5a and 6a of the left and right walls 5 and 6, respectively. Are formed at intervals of a certain distance in the front-rear direction, and between the engaging recesses 31, 32 facing in the left-right direction, a rod-shaped body-in-place (Kuriishi) outflow prevention piece extending in the left-right direction 33 is horizontally mounted from above, and the engaging recesses 31 and 32 are filled with a solidifying material such as mortar, so that the above-mentioned body material (Kuriishi) outflow prevention piece 33 is fixed to the block body 1 integrally. To be able to.
[0127]
In this way, when a river revetment is constructed by the retaining wall block A, the stagnation material (Kuriishi) outflow prevention piece 33 is horizontally placed between the engaging recesses 31 and 32 facing in the left-right direction, and the block By integrating with the main body 1, it is possible to prevent the casing material D filled in the horizontal block main body 1 from being discharged by flowing river water.
[0128]
FIGS. 27 (b) to (d) show examples of transformation of the lift insertion holes 15 and 16 shown in FIG. 27 (a). In FIG. 27 (b), the front and rear lift insertion holes 15 and 16 are shown. One horizontally long lift insertion hole 34 is formed by integrally communicating 16. In FIG. 27 (c), lift engaging recesses 35, 36 that are upwardly protruding at the lower ends of the left and right walls 5, 6 are respectively positioned in front and rear of the longitudinal center line C of the retaining wall block A. Are arranged and formed. In FIG. 27 (d), the front and rear lift engaging recesses 35 and 36 are integrally communicated to form one horizontally long lift engaging recess 37.
[0129]
Further, as shown in FIG. 28, the joint portions 9 and 10 as the left and right spacing holding pieces are formed to bulge outward at the positions of the left and right end surfaces of the front wall 3 and extend in the vertical direction. The front top end surfaces 5d, 6d of the left and right walls 5, 6 and the top end surfaces 9d, 10d of the joints 9, 10 are formed substantially flush with the top end surface 3c of the front wall 3, On the top end surfaces 5d, 6d, 9d, and 10d, block mounting surfaces 13 and 14 are formed.
[0130]
Here, at least one of the front top end faces 5d, 6d of the left and right walls 5, 6 and the top end faces 9d, 10d of the joints 9, 10 is substantially flush with the top end face 3c of the front wall 3. The block mounting surfaces 13 and 14 can be formed entirely or partially.
[0131]
In FIG. 28 and FIG. 29, P is an upper mounting position of the front surface of the front wall 3 when the upper retaining wall block A is mounted, and the upper top end surface of the upper mounting position P and the left and right walls 5, 6 The width formed between the rear ends of 5d and 6d is the front-rear width Wa of the block mounting surface. W1 is the front-rear width of the joints 9, 10, W2 is the front-rear width of the block body 1, W3 is the front-rear width of the rear wall 4, H1 is the height of the front wall 3, and H2 is the height of the rear wall 4.
[0132]
The front-rear width Wx from the front end of the top end surface 3c of the front wall 3 to the rear end of the front top end surfaces 5d, 6d of the left and right side walls 5, 6 is
W2−W1 ≧ Wx ≧ H1 × N × 0.1 + Wa
N: Legal gradient (min)
To satisfy the relationship.
[0133]
In this way, the front and rear widths Wx from the front end of the top end surface 3c of the front wall 3 to the rear end of the front top end surfaces 5d and 6d of the left and right side walls 5 and 6 are formed to the minimum necessary. Since a step is formed between the end surfaces 5d and 6d and the rear top end surfaces 5e and 6e, the retaining wall block A itself can be reduced in weight and the front and rear widths of the block mounting surfaces 13 and 14 can be secured. The upper retaining wall block A placed on the block upper surfaces 13 and 14 can be reliably and stably supported.
[0134]
Moreover, since the joints 9 and 10 are formed at the positions of the left and right end surfaces of the front wall 3 so as to bulge outward and vertically extend, The spacing between the side walls of the retaining wall blocks A and A adjacent in the direction can be kept constant, and also when performing curved construction, the retaining wall blocks A and A adjacent in the left and right direction are It can be arranged with an angle to the position where the end abuts, and can be sufficiently adapted to curve construction with a small curvature radius.
[0135]
Further, a bonding recess 9a extending in the vertical direction is formed at the outer end of either one of the left and right joints 9, and the joint recess is extended in the vertical direction at the outer end of the other joint 10. It is also possible to form the joining ridge 10a to be fitted and connected to 9a.
[0136]
The height H2 of the rear wall 4 is
H1 × 0.25 ≦ H2 ≦ H1 × 0.9
To satisfy the relationship.
[0137]
In this manner, the rolling material D filled in the block body 1 can be efficiently and reliably rolled, and workability can be improved.
[0138]
The height H2 of the rear wall 4 is preferably set to H2 = H1 × 0.5 in terms of temporary product stacking and truck transportation.
[0139]
Further, the block reversal fulcrum recesses 17 and 18 or the block reversal fulcrum through holes 38 shown in FIG. 28 are provided between the front top end surfaces 5d and 6d and the rear top end surfaces 5e and 6e of the left and right side walls 5 and 6, respectively. It forms in the front position rather than the inclined surfaces 5f and 6f to be formed. W4 is the front-rear width between the block inverting fulcrum through hole 38 and the rear end of the inclined surface 5f.
[0140]
In this way, the block main body 1 can be smoothly reversed with the block reversal fulcrum recesses 17, 18 or the block reversal fulcrum through holes 38 as fulcrums, and the block reversal fulcrum recesses 17, 18 or block reversal. The block main body 1 is lifted in a stable posture using the fulcrum through hole 38 for use.
[0141]
In addition, as shown in FIG. 29, the joint portions 9 and 10 as the left and right spacing holding pieces are outside at a position straddling the left and right end surfaces of the front wall 3 and the front outer surfaces of the left and right walls 5 and 6. It can be formed by bulging out and extending vertically, and the front top end surfaces 5d, 6d of the left and right side walls 5, 6 and the top end surfaces 9d, 10d of the joints 9, 10 3 are formed so as to be substantially flush with the top end surface 3c of the block 3, and the block mounting surfaces 13, 14 are formed on these top end surfaces 5d, 6d, 9d, 10d.
[0142]
Here, at least one of the front top end faces 5d, 6d of the left and right walls 5, 6 and the top end faces 9d, 10d of the joints 9, 10 is substantially flush with the top end face 3c of the front wall 3. The block mounting surfaces 13 and 14 can be formed entirely or partially.
[0143]
The front-rear width Wx from the front end of the top end surface 3c of the front wall 3 to the rear end of the front top end surfaces 5d, 6d of the left and right side walls 5, 6 is
W2−W1 ≧ Wx ≧ H1 × N × 0.1 + Wa
N: Legal gradient (min)
To satisfy the relationship.
[0144]
In this way, the front and rear widths Wx from the front end of the top end surface 3c of the front wall 3 to the rear end of the front top end surfaces 5d and 6d of the left and right side walls 5 and 6 are formed to the minimum necessary. Since a step is formed between the end surfaces 5d and 6d and the rear top end surfaces 5e and 6e, the retaining wall block A itself can be reduced in weight, and the front and rear width Wa of the block mounting surfaces 13 and 14 can be secured. Thus, the upper retaining wall block A placed on the upper mounting surfaces 13, 14 can be reliably and stably supported.
[0145]
Moreover, the joints 9 and 10 are formed to bulge outward and extend in the vertical direction at a position straddling the left and right end surfaces of the front wall 3 and the front outer surfaces of the left and right walls 5 and 6. Therefore, it is possible to ensure a constant spacing between the side walls of the retaining wall block A adjacent in the left-right direction via both joints 9 and 10, and also in the left-right direction when performing curved construction. The retaining wall blocks A, A can be arranged at an angle to the position where the rear end of the side wall abuts, and can be sufficiently adapted to curve construction with a small curvature radius.
[0146]
Furthermore, the joints 9 and 10 are bulged outward and extended in the vertical direction at a position straddling the left and right end surfaces of the front wall 3 and the front outer surfaces of the left and right walls 5 and 6. Since it forms, the concave part 9a for joining extended in an up-down direction is formed in the outer end of either one of right and left joining parts 9, and it is extended in the up-down direction at the outer end of the other joining part 10, and the above-mentioned It is possible to easily form the protruding protrusion 10a that fits and connects to the bonding recess 9a.
[0147]
Further, as shown in FIG. 30, the insertion holes 11 for inserting the anti-slip pieces 2 are formed on the top end surface 9 d of the joint portion 9, the front top end surface 5 d of the left side wall 5, and the inner side surface of the left side wall 5. It can be provided on at least one of the top end surfaces 40a of the block upper portion 40, and any one can be appropriately selected according to the degree of displacement in the left-right direction of the block body 1 placed on the upper stage.
[0148]
Although not shown in FIG. 30, in the same manner as described above, the insertion hole 11 for inserting the anti-sliding piece 2 includes the top end face 10d of the joint 10 and the front top end face 6d of the right wall 6 and the right side. It can be provided on at least one of the top end surfaces 40a of the block upper portion 40 formed on the inner side surface of the wall 6, and either one according to the horizontal displacement of the block main body 1 placed on the upper stage. Can be appropriately selected.
[0149]
Moreover, the stacking method when constructing the retaining wall Y by the retaining wall block A as the second embodiment configured as described above is the construction of the retaining wall Y by the retaining wall block A as the first embodiment described above. This can be performed in the same manner as the stacking method as the first embodiment.
[0150]
Next, the stacking method as 2nd Example-5th Example of the retaining wall block A which concerns on this invention is demonstrated, referring FIGS. 31-34.
[0151]
[Stacking method as the second embodiment]
First, here will be described the problem of the stacking method of the retaining wall block A in the case of curved construction. In the retaining wall Y where the curved construction is necessary, the lower stage of the block body 1 laid adjacently in the left-right direction. And the upper row of the block body 1 laid adjacently in the left-right direction in a stacked state on the upper row, the curvature radius of the row is different for each row, so the upper row is lower than the lower row. As the row is displaced little by little in the left-right direction and the row becomes longer, the lower side of the left and right sides of the upper block body are placed on the top end surfaces of the left and right side walls of the lower block body. The problem of disappearing occurs.
[0152]
Therefore, in the stacking method as the second embodiment, as shown in FIG. 31, the lowermost stage (first stage) in advance so that the block body 1 placed on the uppermost stage is laid in a continuous state in the left-right direction. The distance t between block bodies 1 and 1 laid in₁, Spacing t between block bodies 1 and 1 laid in the second stage₂.... Interval t between block bodies 1 and 1 laid on the lowermost level of the uppermost level_n-1Is calculated by reverse calculation, and a so-called potato stacking method is employed in which the upper block body 1 is placed immediately above each block body 1.
[0153]
Further, the retaining wall block A having a sliding safety factor Fs that does not satisfy the relationship of the following “Equation 1” employs the retaining wall block having the above-described anti-sliding piece 2, whereby the following “Equation 2”. To satisfy the relationship.
[0154]
[Expression 1]

[0155]
[Expression 2]

  That is, by setting the sliding resistance force Fr so that the sliding safety factor Fs is equal to or larger than 1.5, for example, the front-rear width of the retaining wall block is suppressed as much as possible (formed to a short width). And the sliding safety factor Fs can be appropriately secured.
[0156]
Note that the sliding safety factor Fs is generally 1.5, but if it fluctuates due to various conditions at the site, it follows that value. Further, the friction coefficient μ can be calculated as 0.600, for example.
[0157]
[Stacking method as the third embodiment]
As shown in FIG. 32, the stacking method according to the third embodiment is such that, in the case of curved construction, the retaining wall block A at the level where the sliding safety factor Fs does not satisfy the relationship of the “Equation 1” is The retaining wall block A having 2 is laid in a discontinuous state with a predetermined spacing in the left-right direction for each retaining wall block A, and the upper retaining wall block A is the lower retaining wall block A The stepped retaining wall block A placed at a position directly above A and satisfying the relationship of the above-mentioned “Equation 1” in the sliding safety factor Fs is laid continuously in the left-right direction for each step.
[0158]
In this manner, the retaining wall blocks A provided with the anti-sliding pieces 2 are stacked one by one at a level where the sliding safety factor Fs does not satisfy the above relationship, for example, only at the first and second levels (so-called immo 1st and 2nd stages by stacking and securing the sliding safety factor Fs appropriately by the anti-sliding piece 2 and laying in a discontinuous state with a predetermined interval left and right for each unit. It is possible to adjust the shift in the left-right direction based on the difference in curvature radius.
[0159]
For the steps where the sliding safety factor Fs satisfies the above relationship, for example, the third and subsequent steps, the retaining wall block A not provided with the sliding prevention piece 2 is not related to the position of the lower retaining wall block A. In addition, each stage can be laid continuously in the left-right direction.
[0160]
Therefore, it is possible to easily perform the laying work without setting the space in the left-right direction, and it is possible to significantly reduce the retaining wall construction time.
[0161]
It should be noted that a retaining wall block provided with the anti-sliding piece 2 can be laid as needed for the step where the sliding safety factor Fs satisfies the above relationship.
[0162]
[Stacking method as the fourth embodiment]
As shown in FIG. 33, the stacking method as the fourth embodiment is a step of preventing slipping in a stepped wall block A in which the sliding safety factor Fs does not satisfy the relationship of “Equation 1” in the case of curved construction. By adopting the retaining wall block A having 2 and laying a plurality (three in this embodiment) retaining wall blocks A within the continuous laying allowable range in the left-right direction, the plurality of retaining wall block groups Ga And a plurality of retaining wall block groups Ga, Ga adjacent to each other in the left-right direction are separated from each other by a predetermined interval, and the upper retaining wall block A is located above the lower retaining wall block A. The retaining wall block A in a step position, which is placed at the position and satisfies the relationship of the above-mentioned “Equation 1” with the sliding safety factor Fs, is laid continuously in the left-right direction.
[0163]
In this way, the retaining wall block A provided with the anti-sliding piece 2 only in the steps where the sliding safety factor Fs does not satisfy the above-described relationship, for example, only in the first and second steps, according to the curvature radius of the curved construction. A plurality of retaining wall block sets Ga within the continuous laying allowable range are continuously laid in the left-right direction to form a plurality of retaining wall block sets Ga, and between the plurality of retaining wall block groups Ga, Ga adjacent in the left-right direction. In the meantime, a predetermined interval is provided between the retaining wall blocks Ga and Ga to form a discontinuous state, and the sliding safety piece F is appropriately secured by the sliding prevention piece 2. By laying in a discontinuous state with a predetermined interval in the left-right direction for each of the multiple retaining wall block sets Ga, it is possible to adjust the shift in the left-right direction based on the difference in curvature radius between the first step and the second step. .
[0164]
At this time, the continuous number of the retaining wall blocks A forming the plurality of retaining wall block sets Ga is set according to the curvature radius in the curve construction, that is, when the curvature radius is small, the continuous number of the retaining wall blocks A is set to be small. In addition, when the radius of curvature is large, the number of continuous retaining wall blocks A can be set to be large, and depending on the number of consecutive retaining wall blocks A, the plurality of retaining wall block groups Ga, Ga Since the direction interval can be set in advance, the laying operation of the retaining wall block A at the step where the sliding safety factor Fs does not satisfy the above relationship can be performed very easily.
[0165]
For the steps where the sliding safety factor Fs satisfies the above relationship, for example, the third and subsequent steps, the retaining wall block A not provided with the sliding prevention piece 2 is not related to the position of the lower retaining wall block A. In addition, each stage can be laid continuously in the left-right direction.
[0166]
Therefore, it is possible to easily perform the laying work without setting the space in the left-right direction, and it is possible to significantly reduce the retaining wall construction time.
[0167]
It should be noted that the retaining wall block A provided with the anti-sliding piece 2 can be laid as needed even for the step where the sliding safety factor Fs satisfies the above relationship.
[0168]
[Stacking method as the fifth embodiment]
As shown in FIG. 34, the stacked construction method as the fifth embodiment is such that, in the case of curved construction, the stepped retaining wall block whose sliding safety factor Fs does not satisfy the relationship of the above-mentioned “Equation 1” is positioned in the left-right direction. A retaining wall block A having an adjustable anti-sliding piece 2 is employed so as to be laid continuously in the left-right direction.
[0169]
In this way, the retaining wall block A provided with the anti-sliding piece 2 is made to continue in the left-right direction only at the level where the sliding safety factor Fs does not satisfy the relationship of “Equation 1”, for example, only at the first level and the second level. The sliding safety factor Fs can be appropriately ensured by the anti-sliding pieces 2.
[0170]
At this time, since the anti-sliding piece 2 can be arranged so that the position can be adjusted in the left-right direction via the left-right direction positioning body 8, after appropriately positioning the upper row of the block body 1 displaced in the left-right direction, By appropriately adjusting the position of each anti-sliding piece 2 in the left-right direction and arranging it at a required position, it is possible to reliably prevent the block main body 1 stacked in the upper stage from sliding.
[0171]
For the steps where the sliding safety factor Fs satisfies the above relationship, for example, the third and subsequent steps, the retaining wall block A not provided with the sliding prevention piece 2 is not related to the position of the lower retaining wall block A. In addition, each stage can be laid continuously in the left-right direction.
[0172]
Therefore, it is possible to easily perform the laying work without setting the space in the left-right direction, and it is possible to significantly reduce the retaining wall construction time.
[0173]
It should be noted that the retaining wall block A provided with the anti-sliding piece 2 can be laid as needed even for the step where the sliding safety factor Fs satisfies the above relationship.
[0174]
[Retaining wall block as the sixth embodiment]
FIG. 35 shows a revetment retaining wall Y constructed by a foundation block B, a fish nest retaining wall block A1 and a vegetation retaining wall block A2 as a sixth embodiment. The base block B and the multi-stage (two-stage in this example) fish nest retaining wall block A1 are stacked as rooting blocks in the ground of the river bed K1, and then the multi-stage (main In the embodiment, the retaining wall block A1 for the fish nest is stacked, and further, the retaining wall block A2 for vegetation is stacked on top of it (5 stages in this embodiment). Yes.
[0175]
The base block B and the retaining wall block A1 for the fish nest are filled with, for example, 50 mm to 150 mm chestnut as a material D, and the same chestnut is placed behind these blocks B and A1. Filled as material U, and inside the retaining wall block A2 for vegetation, for example, 0.01 to 50 mm of crushed stone is filled as the indwelling material D, and the same crushed stone is backed behind the retaining wall block A2. The material U is filled.
[0176]
Here, the retaining wall block A1 for the fish nest and the retaining wall block A2 for the vegetation are basically the same as the retaining wall block A as the first embodiment, as shown in FIGS. Similarly, insertion holes 11 and 11 extending in a substantially vertical direction are formed on the top end surfaces of the front left and right sides of the block body 1, and the anti-slip pieces 2 and 2 ( 25) and any one of the lower connection pieces 41, 41 (see FIG. 38) can be selectively inserted.
[0177]
In this way, the lower portions of the anti-sliding pieces 2 and 2 are inserted into the insertion holes 11 and 11 formed in the top end surface of the front left and right sides of the block body 1, and the anti-sliding pieces 2 and 2 are attached to the top end surface. The upper block main body 1 is prevented from sliding forward by projecting further upward and bringing the lower part of the block main body 1 to be stacked just above the block main body 1 into contact with the anti-skid pieces 2 and 2. be able to.
[0178]
Then, the sliding resistance force Fr can be applied to the lower block main body 1 by preventing the block main body 1 stacked in the upper stage by the anti-sliding pieces 2 and 2.
[0179]
In addition, by inserting the lower portions of the lifting connection pieces 41 and 41 into the insertion holes 11 and 11 formed on the top end surfaces of the front left and right sides of the block body 1, the lifting connection pieces 41 and 41 are The retaining wall blocks A1 and A2 can be easily mounted on the lifting work machine by projecting upward from the end face and connecting the lifting connection pieces 41 and 41 to the lifting work machine via a lifting wire or the like. Can be suspended.
[0180]
Here, as shown in FIG. 38, the lifting connecting piece 41 forms a ring-shaped connecting piece 41b at the upper end portion of the connecting book piece 41a and also forms a locking piece 41c at the lower end portion of the connecting book piece 41a. Then, while the locking piece 41c is locked in the insertion hole 11, a lifting wire or the like is connected to the ring-shaped connecting piece 41b.
[0181]
Therefore, the retaining wall construction work can be efficiently performed by lifting and retaining the retaining wall blocks A1 and A2 by the lifting work machine via the lifting connection piece 41.
[0182]
In addition, the retaining wall block A1 for the fish nest is provided on the left and right sides of the lower block body 1 located between the front wall 3 of the lower block body 1 and the front wall 3 of the block body 1 stacked on the upper stage. Between the walls 5 and 6, a quadrangular plate-like body material outflow prevention body 42 extending in the left-right direction is interposed. 46 is a suction prevention mat for preventing the soil of the riverbank K3 from being sucked out to the backfill material U side.
[0183]
In this way, between the left and right side walls 5 and 6 of the lower block body 1 located between the front wall 3 of the lower block body 1 and the front wall 3 of the block body 1 stacked in the upper stage, By interposing the body-flowing material outflow prevention body 42, the front-rear width W4 of the upper surface opening 43 of the lower block body 1 can be shortened, and the body material filled in the lower block body. It is possible to prevent D from being scoured from the upper surface opening 43 and flowing out to the outside.
[0184]
Here, the casing material D constitutes a part of the retaining wall structure, but the scouring and outflow of the casing material D can be easily performed only by providing the casing material outflow prevention body 42. Therefore, the strength of the revetment retaining wall Y can be ensured satisfactorily.
[0185]
When the retaining wall block A1 is stacked and the revetment retaining wall Y is constructed, fish and the like can enter and exit through the upper surface opening 43 in the block body 1 located below the water surface. Etc. can be made to function as a fish nest block, for example, by laying eggs in the gaps of the encasement material D filled in the block body 1.
[0186]
Also, the retaining wall block A2 for vegetation is a rectangular plate-shaped guest soil partition body 44 extending in the left-right direction between the front portions of the left and right walls 5 and 6 (of the retaining wall block A as the second embodiment). The equivalent soil partition 44, the front wall 3, and the left and right walls 5 and 6 form a soil filling space S1, and the bottom of the soil filling space S1. And the rear part 24a of the customer soil suction prevention sheet 24 is extended to a position below the customer soil partition body 44 and the rear surface of the customer soil partition body 44. It is extended upward along the line.
[0187]
In this way, by laying the permeation-preventing soil suction prevention sheet 24 at the bottom of the soil filling space S1, the body material D filled in the block body 1 and the soil filling space S1 are filled. It can be separated from the filled soil G by the soil suction prevention sheet 24.
[0188]
Accordingly, the customer soil suction prevention sheet 24 can prevent the customer soil G having a small particle size from being sucked (inflowed) into the trunk material D having a large particle size.
[0189]
At this time, since the soil absorption prevention sheet 24 has water permeability, the drainage of the soil G filled in the soil filling space S1 can be appropriately secured, and the plant growth (vegetation) environment can be ensured. It can be secured well and can function as a vegetation block.
[0190]
Also, when the revetment retaining wall Y is constructed by stacking these retaining wall blocks A1 and A2, and the soil G in the soil filling space S1 is scoured due to increased water, the soil spill prevention sheet It is possible to prevent the scouring / outflowing of the stuffing material D that constitutes a part of the retaining wall structure by covering the upper surface of the stuffing material D.
[0191]
Here, when the loading material D filled in the lower block main body 1 is scoured and discharged, the loading material D in the block main body 1 with the upper and lower surface openings stacked immediately above the lower loading main body 1 becomes the lower loading block D. When falling into the block main body 1 and the fallen casing material D is also scoured and discharged, the casing material D in all the block main bodies 1 of the upper and lower surface openings finally stacked upwards In this case, the revetment retaining wall Y may collapse, but in this embodiment, as described above, a part of the retaining wall structure is removed. Since it is possible to prevent scouring and outflow of the trunk material D that constitutes, the strength of the revetment retaining wall Y can be ensured satisfactorily.
[0192]
Further, the rear portion 24a of the soil removal sucking sheet 24 is extended to a position below the customer soil partition 44, and is extended upward along the back surface of the customer soil partition 44, so that the soil suction The rear part 24a of the prevention sheet 24 is pressed and fixed from above by the customer soil partition body 44, and can be pressed and fixed by the loading material D filled behind the customer soil partition body 44. It is possible to satisfactorily ensure the function to prevent the outflow of the intruding material and the function to prevent the soil from being sucked out by the soil sucking prevention sheet 24.
[0193]
Further, a rectangular plate-shaped sheet pressing body 45 extending in the front-rear direction is interposed between the front wall 3 and the customer soil partition body 44, and the customer soil suction prevention sheet 24 is attached by the sheet pressing body 45. I try to hold it from above.
[0194]
Here, a plurality of (three in this embodiment) pressing body receiving recesses 44a, 44a, 44a that open upward and forward are formed on the front surface of the customer soil partition body 44 at intervals in the left-right direction. The rear ends of the sheet pressing bodies 45, 45, 45 are fitted in the respective pressing body receiving recesses 44a, 44a, 44a, and each sheet pressing body 45 is located behind the customer soil partition body 44. It is pressed by the filling material D to be filled and fixed in a state of being pinched between the guest soil partition 44 and the front wall 3.
[0195]
In this way, the soil suction prevention sheet 24 can be pressed from above by the sheet pressing body 45 fixed in a state of being sandwiched between the customer partition wall 44 and the front wall 3, so that the customer can The soil suction prevention sheet 24 can be stably held in the stretched state, and as a result, the function to prevent the outflow of the encasement material and the function to prevent the suction of the soil from the soil can be secured even better. .
[0196]
Moreover, the customer soil partition body 44 and the trunking material outflow prevention body 42 are formed in the same shape and shared.
[0197]
In this way, by making the main soil partition body 44 and the trunking material outflow prevention body 42 in common, the workability can be improved, and the production of the main soil partition body 44 and the trunking material outflow prevention body 42 can be improved. Cost can be reduced.
[0198]
Next, the basic block B, the retaining wall block A1 for fish nest, and the retaining wall block A2 for vegetation will be specifically described with reference to FIGS.
[0199]
That is, as shown in FIG. 39, the basic block B has the same basic structure as the basic block B of the first embodiment, and the block body 20 includes front and rear walls 47, 48 and left and right side walls 49, 50 and 50 are formed in a cylindrical shape with upper and lower openings, and joints 51 and 52 as left and right spacing retaining pieces are bulged outwardly on the front outer surface of the left and right side walls 49 and 50 and vertically. It is formed by stretching. 39A is a plan view, FIG. 39B is a rear view, FIG. 39C is a left side view, FIG. 39D is a right side view, and FIG. 39E is a sectional side view.
[0200]
The left joint 51 is formed with a concave recess 51a extending in the vertical direction and having a semicircular cross section, while the right joint 52 is extending in the vertical direction and having a semicircular cross section. The joining protrusion 52a is formed.
[0201]
In addition, bulging portions 53, 53, 54, 54 that bulge inward are formed at the four corners on the front, rear, left, and right sides of the block body 20, respectively, so that the bulging portions on the left and right front portions and the left rear portion are formed. Insertion holes 11, 11 and 11 are formed in the top end face near 53, 53 and 54, extending substantially vertically downward, and the anti-slip piece 2 (see FIG. 24) is inserted into the insertion hole 11 on the left front part. The lower part can be inserted, and the lower part of either the anti-sliding piece 2 or the suspension connecting piece 41 (see FIG. 38) can be selectively inserted into the insertion hole 11 in the right front part. The lower portion of the lifting connection piece 41 can be inserted into the rear insertion hole 11.
[0202]
Further, a block reversal fulcrum recess 55 extending substantially horizontally in the left-right direction at or near the intersection on the left and right side walls 49, 50 where the front-rear center of gravity position Gx and the vertical center-of-gravity position Gy intersect. 55 is formed.
[0203]
In this way, when removing the block body 20 of the basic block B, the upper surface of the mold (not shown) is removed and the left and right side surfaces are rotated outward to form an inclined posture. In the same state, reversing support shafts (not shown) are respectively inserted into the left and right block reversing fulcrum recesses 55, 55, and the block body 20 is lifted via the reversing support shafts (not shown). The block body 20 can be easily taken out from the mold.
[0204]
Then, the block body 20 molded upside down in the mold is turned upside down by human power around the left and right reversing support shafts while being lifted at the time of demolding. It can be mounted on the mounting place.
[0205]
At this time, the block reversal fulcrum recesses 55, 55 extend substantially horizontally in the left-right direction at the intersections on the left and right side walls 49, 50 where the longitudinal center of gravity position Gx and the vertical center of gravity position Gy of the block body 20 intersect. Therefore, the work of lifting the block main body 20 by the lifting device can be performed smoothly, and the work of turning the block main body upside down by human power can be performed easily and smoothly.
[0206]
As shown in FIG. 40, the retaining wall block A1 for the fish nest has the same basic structure as the retaining wall block A as the first embodiment. In addition to forming a stepped concave shape, rear weight reduction openings 56 and 57 are formed at the rear, and the front and rear center of gravity position Gx and the top and bottom center of gravity position Gy intersect in the left and right joints 9 and 10 in a side view. This is different in that block intersection fulcrum recesses 17 and 18 extending substantially horizontally in the left-right direction are formed at or near the intersection. 40A is a plan view, FIG. 40B is a rear view, FIG. 40C is a left side view, FIG. 40D is a right side view, and FIG. 40E is a sectional side view.
[0207]
And the front-rear width W1 of the joints 9, 10 is
W2 / 2 ≧ W1 ≧ H1 × N × 0.1
To satisfy the relationship. Here, W2 is the front-rear width of the block body 1, H1 is the height of the front wall 3, and N is the normal gradient (minutes).
[0208]
In this way, when removing the block body 1 of the retaining wall block A1 for the fish nest, the upper surface of the mold (not shown) is removed and the left and right side surfaces are rotated outward. In the same state, the reversing support shaft (not shown) is inserted into the left and right block reversing fulcrum recesses 18 and 18 and the block body 1 is suspended via both reversing support shafts. The block body 1 can be easily taken out of the mold by lifting it with an upper device (not shown).
[0209]
And the block main body 1 shape | molded in the upside down state in the mold is turned upside down by human power around the left and right reversing support shafts in a state of being lifted at the time of demolding. It can be mounted on the mounting place.
[0210]
At this time, the block reversal fulcrum recesses 17 and 18 are arranged substantially horizontally in the left-right direction at or near the intersections 9 and 10 where the longitudinal center-of-gravity position Gx and the vertical gravity center position Gy of the block body 1 intersect. Since it is formed by extending, it is possible to smoothly perform the operation of lifting the block main body 1 by the lifting device, and it is possible to easily and smoothly perform the operation of turning it upside down by human power.
[0211]
Moreover, since the reversing support shafts are inserted into the block reversing fulcrum recesses 17 and 18 formed on the joints 9 and 10, the left and right side surfaces of the mold frame are rotated outward to incline. In this state, the block body 1 can be lifted, and there is no need to rotate the left and right side surfaces of the mold frame outward by nearly 90 degrees. The efficiency of manufacturing work can be improved.
[0212]
In addition, around the block reversal fulcrum recesses 17 and 18, recess surfaces 58 and 59 that are perpendicular surfaces orthogonal to the front wall 3 are formed.
[0213]
In addition, on the inner surfaces of the left and right side walls 5 and 6 of the block main body 1, the outflow prevention body receiving recesses 5f and 6f that open upward and inward are formed, respectively. As shown in FIGS. By fitting the left and right end portions of the above-described inflowing material outflow prevention body 42 into the outflow prevention body receiving recesses 5f and 6f, the inflowing material outflow prevention body 42 is connected to the front wall 3 of the lower block main body 1. And it is located between the front wall 3 of the block main body 1 piled up on the upper stage, and is interposed in the horizontal form.
[0214]
Here, the distance between the front wall 3 of the lower block body 1 and the encasement material outflow prevention body 42, or the interval between the encasement material outflow prevention body 42 and the front wall 3 of the upper block body 1 is at least. It is set so as to be smaller than the maximum particle size of the casing material D filled in the block main body 1 so that scouring and outflow of the casing material D can be prevented.
[0215]
Furthermore, fish entry / exit openings 60, 60 are formed on the left and right sides of the front wall 3, respectively, and fish etc. enter / exit into the block body 1 through the fish entry / exit openings 60, 60. The retaining wall block A1 functions as a fish nest block.
[0216]
As shown in FIG. 41, the retaining wall block A2 for vegetation has the same basic structure as the retaining wall block A1 for fish nest described above, but the inner surfaces of the left and right walls 5 and 6 of the block body 1 Further, instead of the outflow prevention body receiving recesses 5f and 6f, partition body receiving recesses 5g and 6g that open upward and inward, respectively, are formed. It differs in that it does not form. 41A is a plan view, FIG. 41B is a rear view, FIG. 41C is a left side view, FIG. 41D is a right side view, and FIG. 41E is a sectional side view.
[0217]
The partition receiving recesses 5g and 6g formed on the inner surfaces of the left and right walls 5 and 6 correspond to the above-mentioned customer soil partition 44 (corresponding to the support 7 of the retaining wall block A as the second embodiment). ) Are fitted in a horizontal form by fitting the left and right side end portions.
[0218]
Further, as shown in FIGS. 35 and 36, the upper block main body 1 is arranged such that the front wall 3 is positioned immediately above the customer soil partition 44 provided on the lower block main body 1.
[0219]
Here, the upper block main body 1 can be arranged so that the front wall 3 is located in a front position or a rear position relative to the customer soil partition 44 provided in the lower block main body 1. 3 is set to be smaller than the maximum particle size of the encasement material D filled in the block main body 1 so that it is in the upper and lower block main bodies 1, 1. The filled body material D is prevented from being scoured and discharged.
[0220]
The retaining wall block A2 for vegetation can be removed from the block body 1 by molding with the mold frame, similarly to the retaining wall block A1 for fish nest.
[0221]
FIG. 42 is an example of a change in the arrangement position of the rear end portion 24a of the customer soil suction prevention sheet 24. The rear end portion 24a is arranged below the customer soil partition body 44, and 44, the rear end 24a of the land for preventing soil suction 24 is pressed and fixed from above.
[0222]
And the front end part 24b of the customer soil suction prevention sheet 24 extends upward along the back surface (rear surface) of the front wall 3 so that the earth pressure of the customer soil G acts on the front end part 24b, It prevents the customer soil suction prevention sheet 24 from being pulled rearward and displaced.
[0223]
FIG. 43 is another example of a change in the arrangement position of the rear end portion 24a of the soil-absorbing prevention sheet 24. The rear-end portion 24a is extended substantially horizontally to the rear position from the customer-soil partition body 44. Thus, the rear end portion 24a is clamped and fixed from above and below by the waist material D.
[0224]
And the front end part 24b of the customer soil suction prevention sheet 24 extends upward along the back surface (rear surface) of the front wall 3 so that the earth pressure of the customer soil G acts on the front end part 24b, The customer soil suction prevention sheet 24 is prevented from being displaced rearward.
[0225]
35 to 37, the front end 24b is extended upward along the back surface (rear surface) of the front wall 3 so that the front end 24b It is also possible to prevent the soil soil suction prevention sheet 24 from being displaced rearward by applying earth pressure.
[0226]
In addition, as the anti-slip | skid piece 2 used in a present Example, the thing of any form shown in FIG.4, FIG.24 or FIG.25 can be selected suitably, and can be used.
[0227]
In the present embodiment, the block main body 1 having upper and lower surface openings has been described. However, the present invention can also be applied to a block main body 1 having an upper surface opening and a bottom (the lower surface is not open). The scouring and outflow of the filling material D can be reliably prevented.
[0234]
【The invention's effect】
  (1) In the present invention described in claim 1,In a retaining wall block with a block body formed at least on the top surface from the front and rear walls and the left and right walls, a customer soil partition is provided between the front parts of the left and right walls, The body, the front wall, and the left and right walls form a soil filling space, and a permeable soil suction prevention sheet is stretched at the bottom of the soil filling space, and the rear portion of the soil suction prevention sheet. Is extended to the lower position of the customer partition,A sheet pressing body is interposed between the front wall and the customer soil partition body, and the customer soil suction prevention sheet is pressed from above by the sheet pressing body.
[0235]
  In this way, the customer soil suction prevention sheet can be stably held in the stretched state by pressing the customer soil suction prevention sheet from above with the sheet pressing body, and the encasement material by the customer soil suction prevention sheet The outflow prevention function and the customer soil suction prevention function can be ensured even better.
  In other words, the customer soil sucking prevention function can prevent the customer soil having a small particle size from being sucked (inflowed) to the loading material side having a large particle size by the customer soil sucking prevention sheet.
  At this time, the soil evacuation sheet has water permeability, so that the drainage of the soil filled in the soil filling space can be ensured appropriately, and the plant growth (vegetation) environment is secured well. Can function as a vegetation block.
  In addition, as a function to prevent spillage of the intrusion material, when building up a revetment retaining wall by stacking retaining wall blocks, even if the soil in the soil filling space is scoured due to increased water, The prevention sheet covers the upper surface of the casing material, and the casing material constituting a part of the retaining wall structure can be prevented from being scoured. As a result, the strength of the revetment retaining wall can be secured satisfactorily.
[0236]
  (2Claim2In the described invention, the block main body formed at least on the upper surface opening from the front and rear walls and the left and right walls is provided.Stacked retaining wall structureIn the lower block body and the left and right walls of the lower block body located between the front wall of the block body stacked on the upper stage, Yes.
[0237]
In this way, the trunk material leakage prevention body is interposed between the left and right walls of the lower block body located between the front wall of the lower block body and the front wall of the block body stacked in the upper stage. By installing, the front and rear width of the upper surface opening of the lower block body can be shortened, and the filling material filled in the lower block body is scoured from the upper surface opening and flows out to the outside Can be prevented.
[0238]
Here, the casing material constitutes a part of the retaining wall structure, but the scouring / spilling of the casing material can be easily and reliably performed simply by inserting the casing material leakage prevention body. Therefore, the strength of the revetment retaining wall can be secured satisfactorily.
[0239]
In addition, when building a revetment retaining wall by stacking such retaining wall blocks, fish and the like can enter and exit through the upper surface opening in the block body located below the water surface. It can also function as a fish nest block by, for example, laying eggs in the gap between the filling materials filled therein.
[0240]
Here, in such a retaining wall block, it is possible to prevent the scouring / spilling out of the trunking material by providing the trunking material outflow prevention body, and to actively form a space for the fish nest in the block body. It is possible to secure a good function as a fish nest block.
[Brief description of the drawings]
FIG. 1 is a cross-sectional side view (straight line construction) of a retaining wall constructed by stacking retaining wall blocks as a first embodiment according to the present invention.
FIG. 2 is a sectional side view (curve construction) of a retaining wall constructed by stacking retaining wall blocks as a first embodiment according to the present invention.
FIG. 3 is a plan view of the retaining wall block.
FIG. 4 is a sectional side view of the retaining wall block.
FIG. 5 is an explanatory diagram of a backfilling material that acts as a load on a vertical load receiving piece.
FIG. 6 is an explanatory diagram of retaining wall blocks arranged in a straight line.
FIG. 7 is an explanatory view of a retaining wall block that is bent in a convex shape forward and arranged in a stacked manner.
FIG. 8 is an explanatory view of a retaining wall block that is bent in a convex shape rearward and arranged in a stacked manner.
FIG. 9 is a sectional side view of a retaining wall constructed by stacking retaining wall blocks as a second embodiment according to the present invention.
FIG. 10 is a left side view of the retaining wall block.
FIG. 11 is a right side view of the retaining wall block.
FIG. 12 is a sectional side view of the retaining wall block.
FIG. 13 is a plan view of the block main body.
FIG. 14 is a rear view of the block main body.
FIG. 15 is an explanatory plan view of a retaining wall block.
FIG. 16 is a rear view of the retaining wall block.
FIG. 17 is a plan view of a support.
FIG. 18 is a rear view of the support.
19 is a cross-sectional view taken along the line II of FIG.
20 is a cross-sectional view taken along line II-II in FIG.
21 is a sectional view taken along line III-III in FIG.
FIG. 22 is a cross-sectional side explanatory view of the retaining wall block stacked state.
FIG. 23 is a perspective explanatory view of a slip prevention piece.
FIG. 24 is a perspective view of a slide preventing piece as another embodiment.
FIG. 25 is a perspective view of an anti-skid piece as another embodiment.
FIG. 26 is an explanatory plan view of a retaining wall block.
FIG. 27 is an explanatory diagram of a lift insertion part.
FIG. 28 is an explanatory diagram of a joint portion.
FIG. 29 is an explanatory diagram of a joint portion.
FIG. 30 is an explanatory plan view of a block main body as a modification example;
FIG. 31 is an explanatory plan view of a stacking method as a second embodiment.
FIG. 32 is an explanatory plan view of a stacking method as a third embodiment.
FIG. 33 is an explanatory plan view of a stacking method as a fourth embodiment.
FIG. 34 is an explanatory plan view of a stacking method as a fifth embodiment.
FIG. 35 is a cross-sectional side view of a revetment retaining wall constructed by stacking retaining wall blocks as a sixth embodiment.
FIG. 36 is a partially enlarged cross-sectional side view of the revetment retaining wall.
FIG. 37 is a partially enlarged plan view of the revetment retaining wall.
FIG. 38 is a front view of a lifting connection piece.
FIG. 39 is an explanatory diagram of a basic block.
FIG. 40 is an explanatory diagram of a retaining wall block for a fish nest.
FIG. 41 is an explanatory diagram of a retaining wall block for vegetation.
FIG. 42 is a cross-sectional side view showing a modified example of a guest soil suction prevention sheet.
FIG. 43 is a cross-sectional side view showing another modified example of the customer soil suction prevention sheet.
[Explanation of symbols]
A Retaining wall block
Y retaining wall
1 block body
2 Anti-slip piece

Claims (2)

In the retaining wall block having a block body formed at least on the upper surface opening from the front / rear wall and the left / right wall,
A guest soil partition is interposed between the front part of the left and right walls, and the customer soil filling space is formed by the customer soil partition, the front wall, and the left and right walls, at the bottom of the customer soil filling space. While stretching the customer soil suction prevention sheet having water permeability, the rear part of the customer soil suction prevention sheet is extended to the lower position of the customer soil partition,
And interposed the sheet pressing member is provided between the front wall and the soil dressing partition member, retaining wall blocks, characterized in that it has to hold the soil dressing wicking prevention sheet from above by the sheet retainer member. In the retaining wall structure in which the block bodies formed at least on the upper surface opening from the front and rear walls and the left and right walls are stacked .
A body discharge prevention body is interposed between the left and right side walls of the lower block body located between the front wall of the lower block body and the front wall of the block body stacked on the upper stage. Retaining wall structure .

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