JP4386229B2

JP4386229B2 - Ground holding structure

Info

Publication number: JP4386229B2
Application number: JP2000330606A
Authority: JP
Inventors: 孝行阿比留
Original assignee: 新技術工営株式会社
Priority date: 2000-10-30
Filing date: 2000-10-30
Publication date: 2009-12-16
Anticipated expiration: 2020-10-30
Also published as: JP2002138482A

Description

【０００１】
【発明の属する技術分野】
本発明は、グラウンドアンカーを用いる地盤保持構造に関する。
【０００２】
【従来の技術】
造成した法面もしくは斜面に対し、地盤崩壊による地滑りの発生等を防ぐために、グラウンドアンカーで地盤を安定化する工事が従来から広く行われてきた。
従来のグラウンドアンカー設置の一般的な工法は、鋼線等からなるアンカー引張部材を地盤中に挿入してその一端部を地盤中に固定する一方、アンカー引張部材他端側を地上に露出させた状態とし、さらにコンクリート製のアンカー台座を地盤表面に設置した後、前記アンカー引張部材を所定の張力が得られるまで緊張した状態でその地上露出部分をアンカー台座に一体に固定するというものであり、アンカー引張部材の張力をアンカー台座から地盤に伝えるようにして地盤を安定に保持する仕組みとなっている。
【０００３】
しかし、従来のグラウンドアンカー設置工事で用いたアンカー台座はコンクリート製であるため、重量が非常に重く、大型トラックや大型クレーン等の重機を用いなければ運搬や設置が行えず、大型重機の入りきれない狭い工事現場では法面上方までアンカー台座を持上げて設置することができなくなるという問題を有していた。
【０００４】
こうした問題を解決するために、近年、アンカー台座として、コンクリート製の代りに鋼板を箱形に組合わせた受圧フレームが利用されるようになっている。その一例として、意匠登録第１０５８３９０号公報に記載されるものがあり、これを図７及び図８に示す。図７は従来の受圧フレームの平面図、図８は従来の受圧フレームの横断面図である。
【０００５】
前記各図に示す従来の受圧フレーム１００は、貫通状態の中心孔１０１ａを有する略箱状体のコア部１０１と、このコア部１０１同様中空の略箱状体で形成され、コア部１０１に対し十字状に配置されてコア部１０１と一体に固定される四つのアーム部１０２と、コア部１０１及びアーム部１０２の地盤表面寄り側に一体に固着される略方形状の底板１０３とを備える構成である。
【０００６】
前記した構成の受圧フレーム１００は、十分な強度を有しながらコンクリート製に比べて軽量であり、狭い工事現場に入るような小型重機でも設置作業が行え、設置箇所の制限が解消される。また、設置後、必要に応じて内部の中空部分にコンクリート等の充填材を充填してより強度や地盤保持力を増すこともできる。
【０００７】
【発明が解決しようとする課題】
従来のグラウンドアンカー用受圧フレームは以上のように構成されていることから、コンクリート製のアンカー台座程ではないものの、重量が重く、形状も大きく分割できない上、現場での組立もできないために、トラックやクレーン等を用いなければ運搬や設置が行えず、作業機械が到達できないような作業条件の厳しい工事現場では法面に受圧フレームを設置するのが著しく困難であるという課題を有していた。
【０００８】
また、近年、こうしたグラウンドアンカーを地盤保持力がもっと小さくて済むような法面箇所における地盤保持にも適用することが提案されており、この場合、地盤保持力が従来より小さくなっても、受圧フレームにはより軽量で搬入しやすいことが求められているが、従来の受圧フレームでは、大きさ及び重量が必要以上に大きく、取扱いにくい上、適用する地盤に対して過大な強度を有しており、その分コスト高になってしまい、現実には使用しにくいという課題を有していた。
【０００９】
さらに、従来のグラウンドアンカーでは、原則として、アンカー引張部材と一体化されたアンカー台座や受圧フレームの接地部分のみで地盤を保持しており、地盤によっては、単位面積当りの受圧フレームで保持される面積の割合が小さいと地盤保持が不十分になる場合もあることから、単純に受圧フレームの大きさを大きくしたり、アンカー引張部材及び受圧フレームの設置数を増やしたりして、受圧フレームで保持される面積割合の増加を図ることが一般的に行われていたが、受圧フレームの大型化は作業を行いにくくし、アンカー工事全体の能率が低下すると共に、受圧フレームの設置数増加も、工事期間の長期化を招き、工事全体のコストを増大させるという課題を有していた。
【００１０】
本発明は前記課題を解決するためになされたもので、地盤を保持する部分を複数に分散させた構造として、地盤の保持面積を十分確保しながら、各保持部分の軽量化を可能とし、現場への搬入を容易にして設置条件を緩和すると共に、工事全体での手間とコストの低減も図れる地盤保持構造を提供することを目的とする。
【００１１】
【課題を解決するための手段】
本発明に係る地盤保持構造は、地盤中に一端部を固定されているアンカー引張部材の他端側地上露出部分に対し、一体に固定された状態で地盤表面に設置される受圧フレームを少なくとも備え、当該受圧フレームで地盤表面を押圧して地盤を保持する地盤保持構造において、前記受圧フレームがアンカー引張部材と一体化された状態で地盤に所定間隔で複数配置され、前記各受圧フレームにそれぞれ端部を固定されて対向する受圧フレーム間に張り渡される一又は複数本の略線状の緊張材と、当該緊張材と接触して少なくとも緊張材に地盤表面から離れる方向への動きを所定範囲内に拘束された状態で各受圧フレーム間の地盤表面に一又は複数配設され、地盤表面側に向けた一端面が開放し且つ内部に所定の収納空間を有する略箱状体を地盤表面側に有してなる押圧用フレームと、前記押圧用フレームの収納空間に収納されて押圧用フレームと地盤表面との間に配設され、所定体積まで膨張可能である所定の膨張体とを備え、当該膨張体が、可撓性を有する略袋状体の充填用袋で形成され、前記押圧用フレームと地盤表面との間に配設された前記充填用袋内に所定の充填材を地盤の不陸状態に合せた所定の膨張状態まで充填して、充填用袋を地盤表面に接地密着させて硬化させる一方、前記押圧用フレームを前記緊張材と共に地盤表面から離れる向きに所定距離移動させて緊張材を緊張させ、緊張材に緊張力の地盤表面側方向成分を発生させるものである。
【００１２】
このように本発明においては、地盤表面に所定間隔で配設された複数の受圧フレーム間に緊張材を張り渡し、この緊張材の中間位置に押圧用フレーム及び膨張体を組合わせて配設し、膨張体の膨張で受圧フレーム間の緊張材を緊張させ、緊張材下側の押圧用フレームや膨張体を介して地盤に押圧力を与えることにより、受圧フレーム配設位置に加えて各受圧フレーム間の各押圧用フレーム配設位置でも地盤を保持できることとなり、小型の受圧フレームを用いても地盤の保持面積を十分確保して確実に地盤を保持でき、必要な各部材を人手で搬入可能として従来施工が難しかった状況でも施工可能となり、様々な工事箇所に適用できると共に、地盤の凹んだ部分にも押圧用フレームで押圧力を与えて保持可能であり、地盤の不陸への追随性にも優れ、地盤の保持だけでなく地盤の崩壊を抑えるためのプレストレスも積極的に導入できる。加えて、アンカー引張部材の張力を抑えて受圧フレームの強度及び地盤保持力を弱めた場合でも、また、アンカー引張部材及び受圧フレームの設置数を低減した場合でも、受圧フレームと緊張材及び押圧用フレームを組合わせることで十分な地盤保持が行え、経済性に優れた地盤保持が可能となる。
【００１３】
また、膨張体として充填用袋が地盤表面と押圧用フレーム間に配設され、充填用袋への充填材の充填で受圧フレーム間の緊張材を緊張させ、押圧用フレームや充填用袋を介して地盤に押圧力を与えることにより、充填用袋への充填量の調整で容易に緊張材の緊張状態、すなわち押圧用フレーム位置での押圧力の調整が行え、各受圧フレーム間各位置における地盤保持状態を最適化できると共に、充填材を充填される柔軟な充填用袋が地盤表面に密着して地盤の不陸に細かく対応することとなり、押圧力を適切に地盤に伝えられ、確実に地盤を保持できる。加えて、充填用袋への充填材の充填作業は比較的容易であり、作業全体の能率向上とコストダウンも図れる。
【００１４】
また、略箱状体が緊張材と地盤表面との間に配設され、内部の収納空間に収納した膨張体を介して地盤表面に緊張材の緊張力を押圧力として伝えることにより、簡略な構造で効果的に地盤を押圧でき、搬入しやすいと共に、コストダウンが図れる。
【００１５】
また、本発明に係る地盤保持構造は必要に応じて、前記押圧用フレームが、前記略箱状体の上側に複数のリンク部材を組合わせたリンク機構を有し、地盤表面への配設状態における各リンク部材の相対位置関係の調整で地盤垂直方向寸法を変更可能とされてなり、地盤垂直方向寸法を変えて緊張材の緊張状態を調整するものである。
【００１６】
このように本発明においては、押圧用フレームが複数のリンク部材の組合わせで地盤垂直方向寸法を調整可能に形成され、緊張材と地盤表面との間への配設状態で押圧用フレームの地盤垂直方向寸法を調整して緊張材の緊張状態を変化させられることにより、緊張材の緊張力に基づく地盤への押圧力を調整できることとなり、膨張体の膨張状態調整と合わせて地盤の押圧状態を最適な状態に調整できる。
【００１７】
また、本発明に係る地盤保持構造は必要に応じて、前記押圧用フレームと緊張材との間における一又は複数の所定箇所に配設され、当該所定箇所における押圧用フレームと緊張材の相互間の圧力状態を検知する所定の圧力検知手段と、前記押圧用フレームの所定リンク部材間に配設され、前記圧力検知手段で検知された押圧用フレームと緊張材間の圧力状態に応じて押圧用フレームをなす前記各リンク部材の相対位置関係を変化させる所定の寸法調整手段とを備えるものである。
【００１８】
このように本発明においては、押圧用フレームと緊張材との間の圧力状態を検知する圧力検知手段が配設されると共に、圧力検知手段の検知結果に基づいて押圧用フレームの各リンク部材の相対位置関係を変化させる寸法調整手段が配設され、押圧用フレームと緊張材間の圧力変化に応じて寸法調整手段が押圧用フレームの各リンク部材の相対位置関係を変化させ、押圧用フレームの地盤垂直方向寸法を調整することにより、押圧用フレーム配設位置における地盤の状態が変化して緊張材の緊張力が変化すると、これに伴って押圧用フレームの地盤垂直方向寸法が自動調整されて緊張材の緊張状態を所定範囲内に維持できることとなり、地盤の変化に対応して緊張力に基づく地盤への押圧力を常に最適な状態に人手を経ずに調整でき、保守の手間をかけずに長期にわたり安全に地盤を保持できる。
【００１９】
また、本発明に係る地盤保持構造は必要に応じて、前記押圧用フレームと緊張材との間における一又は複数の所定箇所に配設され、当該所定箇所における押圧用フレームと緊張材の相互間の圧力状態を検知し、取得した情報を外部の管理手段に送信する所定の圧力検知手段と、前記押圧用フレームの所定リンク部材間に配設され、前記管理手段からの遠隔操作に基づいて押圧用フレームをなす前記各リンク部材の相対位置関係を変化させる所定の寸法調整手段とを備えるものである。
【００２０】
このように本発明においては、押圧用フレームと緊張材との間の圧力状態を検知して外部の管理手段に送信する圧力検知手段が配設されると共に、管理手段からの遠隔操作に基づいて押圧用フレームの各リンク部材の相対位置関係を変化させる寸法調整手段が配設され、押圧用フレームと緊張材間の圧力変化に応じて寸法調整手段が押圧用フレームの各リンク部材の相対位置関係を変化させ、押圧用フレームの地盤垂直方向寸法を調整することにより、押圧用フレーム配設位置における地盤の状態が変化して緊張材の緊張力が変化すると、これに伴って押圧用フレームの地盤垂直方向寸法が自動調整されて緊張材の緊張状態を所定範囲内に維持できることとなり、地盤の変化に対応して緊張力に基づく地盤への押圧力を常に最適な状態に人手を経ずに調整でき、保守の手間をかけずに長期にわたり安全に地盤を保持できる。
【００２１】
また、本発明に係る地盤保持構造は必要に応じて、前記押圧用フレームの配置位置を各受圧フレーム間に張り渡される複数の緊張材が交差する地点とするものである。
このように本発明においては、押圧用フレームを複数の緊張材の交差する位置に配設し、各膨張体を膨張させて複数の緊張材をまとめて緊張させることにより、押圧用フレームに複数の緊張材の緊張力に基づく地盤側への大きな力を発生させられることとなり、押圧用フレームから膨張体を介して強い押圧力を地盤に与えられ、確実に地盤を押圧保持できる。
【００２２】
また、本発明に係る地盤保持構造は必要に応じて、前記受圧フレームが、所定の多角形平面形状の略箱状体で形成され、地盤表面への設置後に内部へ所定の充填材を充填され、且つ当該充填材を硬化させられるものである。
このように本発明においては、受圧フレームが略箱状体とされ、地盤表面への設置後に受圧フレーム内部へ充填材を充填して、受圧フレームの重量及び強度を高めることにより、緊張材端部を固定する受圧フレームの強度を高めて緊張材により大きな緊張力を発生させることができ、地盤への押圧力をさらに高めて地盤保持の信頼性を高められる。
【００２３】
【発明の実施の形態】
（本発明の第１の実施形態）
以下、本発明の第１の実施形態を図１ないし図３に基づいて説明する。図１は本実施形態に係る地盤保持構造の平面図及び要部側面図、図２は本実施形態に係る地盤保持構造における受圧フレーム及び押圧用フレームの斜視図、図３は本実施形態に係る地盤保持構造におけるワイヤ緊張前状態及びワイヤ緊張状態説明図である。
【００２４】
前記各図において本実施形態に係る地盤保持構造は、地盤５０に固定されているアンカー引張部材１０の地上露出部分と一体に固定された状態で地盤５０表面に所定間隔で複数配設される略箱状体の受圧フレーム１１と、この各受圧フレーム１１にそれぞれ端部を固定されて受圧フレーム１１間に複数本張り渡される緊張材としてのワイヤ１２と、これらワイヤ１２と接触して各ワイヤ１２に地盤５０表面から離れる方向への動きを所定範囲内に拘束された状態で各受圧フレーム１１間の地盤５０表面に複数配設され、地盤５０表面側に開放する所定の収納空間を有してなる押圧用フレーム１３と、この押圧用フレーム１３と地盤５０表面との間に配設される膨張体としての充填用袋１４とを備える構成である。
【００２５】
前記受圧フレーム１１は、平面形状が略六角形となる中空の鋼板製略箱状体で形成され、この略箱状体の内部には所定の筒体がその両端を略箱状体上下面にそれぞれ固定されて配設されると共に、略箱状体上下面に筒体内部に連通する貫通孔がそれぞれ穿設されてなり、この上下の貫通孔及び筒体内部をアンカー引張部材１０の一部が通る中心孔１１ａとされてなる構成である（図２（Ａ）参照）。
【００２６】
この受圧フレーム１１は、一端部を地盤５０中に固定されると共に他端側を地上に露出させて配設されているアンカー引張部材１０に対し、アンカー引張部材１０の他端側地上露出部分を中心孔１１ａに通した状態として地盤５０表面に配設され、内部に所定の充填材を充填・硬化させた後、中心孔１１ａを通ったアンカー引張部材１０の他端部と一体化されて地盤５０表面に固定される仕組みである。なお、受圧フレーム１１は充填材を充填する以前の状態では人手で持運びが可能な軽量構造とされ、現場への搬入も容易に行えて作業性に優れる。
【００２７】
前記ワイヤ１２は、所定の引張強度を有する鋼線であり、両端部を対向する受圧フレーム１１の側面にそれぞれ固定され、受圧フレーム１１間に所定の緊張状態で張り渡される構成である。このワイヤ１２端部の受圧フレーム１１側面における固定位置は、受圧フレーム１１間に張り渡されるワイヤ１２の数やワイヤ１２に加わる荷重（緊張力）に応じて変更可能となっている。そして、ワイヤ１２端部の固定方法は、ボルト止めやくさび挿入、溶接等で受圧フレーム１１側面に固定される他、受圧フレーム１１内で硬化する充填材との一体化によっても固定される。
【００２８】
前記押圧用フレーム１３は、一端面が開放し且つ内部に前記収納空間を有する鋼板製略箱状体で形成され、開放端側を地盤表面側に向けてワイヤ１２の中間位置と地盤５０表面との間に配設される構成である。押圧用フレーム１３の上部には、ワイヤ１２を係合させるワイヤ保持溝１３ａが複数条形成され、押圧用フレーム１３をワイヤ１２と地盤５０表面との間から外れないように拘束できる仕組みである（図２（Ｂ）参照）。
【００２９】
前記充填用袋１４は、所定の充填材を充填される中空袋状体で形成され、押圧用フレーム１３内の収納空間に収納されて押圧用フレーム１３と地盤５０表面との間に配設され、内部に充填材を所定量充填されて所定の膨張状態まで膨張し、最終的に硬化して膨張状態を維持する構成である。この充填用袋１４が膨張すると、押圧用フレーム１３をワイヤ１２と共に地盤５０表面から離れる向きに移動させてワイヤ１２を緊張させ、ワイヤ１２に緊張力の地盤表面側方向成分を発生させる仕組みである。
【００３０】
次に、前記構成に基づく地盤保持構造の設置及び設置後の荷重伝達状態について説明する。まず、受圧フレーム１１、ワイヤ１２、押圧用フレーム１３、及び充填用袋１４を、それぞれ別々に現場に搬入する。そして、あらかじめ充填用袋１４を押圧用フレーム１３の収納空間に収納し、押圧用フレーム１３と一体化しておく。この後、受圧フレーム１１を、アンカー引張部材１０の地上露出部分が受圧フレーム１１の中心孔１１ａに通る状態として、アンカー引張部材１０打設箇所にそれぞれ載置する。
【００３１】
また、押圧用フレーム１３を地盤表面における各受圧フレーム１１間の所定位置に載置し、この押圧用フレーム１３上のワイヤ保持溝１３ａにワイヤ１２中間位置を係合させた状態でワイヤ１２の両端部を受圧フレーム１１各側面に固定する。
この後、所定の充填材充填で受圧フレーム１１内部を埋めた後、受圧フレーム１１をアンカー引張部材１０と定着させて受圧フレーム１１を地盤５０に固定する。
【００３２】
さらに、受圧フレーム１１内部が硬化した後、充填用袋１４に所定の充填材を充填して膨張させ、押圧用フレーム１３と地盤５０との間隙を調整し、ワイヤ１２における緊張力を増大させ、ワイヤ１２の緊張力の地盤表面側方向成分を押圧用フレーム１３及び充填用袋１４から押圧力として地盤５０へ伝達可能とすれば、地盤５０への設置完了となる（図３（Ｂ）参照）。
【００３３】
続いて、この本実施の形態に係る地盤保持構造における荷重伝達状態について説明する。地盤５０表面への定着状態で、アンカー引張部材１０に一体に固定されている受圧フレーム１１において、アンカー引張部材１０の緊張力が、受圧フレーム１１上面を経て地盤表面側に向う力として伝達され、最終的に受圧フレーム１１の下面から地盤５０へ押圧力として加わり、地盤５０を保持可能となる。
【００３４】
また、ワイヤ１２に生じている緊張力のうち、地盤表面側方向成分が、ワイヤ１２の地盤寄りに配置されている押圧用フレーム１３に地盤表面側に向う力として伝わる。こうして押圧用フレーム１３に伝わった地盤表面側に向う力が、膨張状態の充填用袋１４に伝わり、さらに充填用袋１４の下面から地盤５０表面に押圧力として加わり、こうして地盤５０表面を押圧して地盤５０を保持する。
【００３５】
このように、本実施の形態に係る地盤保持構造においては、地盤５０表面に所定間隔で配設された複数の受圧フレーム１１間にワイヤ１２を張り渡し、このワイヤ１２の中間位置に略箱状の押圧用フレーム１３及び充填用袋１４を配設し、充填材の充填による充填用袋１４の膨張で受圧フレーム１１間のワイヤ１２を緊張させ、ワイヤ１２下側の押圧用フレーム１３や充填用袋１４を介して地盤５０に押圧力を与えられることから、受圧フレーム１１配設位置に加えて各押圧用フレーム１３配設位置でも地盤５０を保持できることとなり、小型の受圧フレーム１１を用いても地盤５０の保持面積を十分確保して確実に地盤５０を保持でき、必要な各部材を人手で搬入可能な大きさとして従来施工が難しかった状況でも施工可能となり、様々な工事箇所に適用できると共に、地盤５０の凹んだ部分にもワイヤ１２、押圧用フレーム１３及び充填用袋１４で押圧力を与えて保持可能であり、地盤５０の不陸への追随性にも優れ、地盤５０の保持だけでなく地盤５０の崩壊を抑えるためのプレストレスも積極的に導入できる。また、充填用袋１４への充填材充填量の調整で容易に押圧用フレーム１３位置での押圧力調整が行え、各受圧フレーム１１間の各位置における地盤保持状態を最適化できると共に、可撓性材料製の充填用袋１４が充填材の充填で地盤５０表面に密着して地盤５０の細かい不陸にも対応することとなり、押圧力を適切に地盤５０に伝えられる。
【００３６】
なお、前記第１の実施形態に係る地盤保持構造においては、各受圧フレーム１１間に押圧用フレーム１３を一つ配設する構成としているが、これに限らず、各受圧フレーム１１間の複数箇所に押圧用フレーム１３をそれぞれ配設する構成とすることもでき、各受圧フレーム１１間の地盤５０を複数箇所で押圧して保持できる。
【００３７】
（本発明の第２の実施形態）
本発明の第２の実施形態を図４ないし図６に基づいて説明する。図４は本実施形態に係る地盤保持構造の平面図、図５は本実施形態に係る地盤保持構造における押圧用フレームの平面図及び側面図、図６は本実施形態に係る地盤保持構造における地盤変化によるワイヤ弛緩状態及びワイヤ再緊張状態説明図である。
【００３８】
前記各図において本実施形態に係る地盤保持構造は、前記第１の実施形態同様、受圧フレーム２１と、ワイヤ２２と、押圧用フレーム２３と、充填用袋２４とを備える一方、異なる点として、押圧用フレーム２３が、複数のリンク部材を組合わせたリンク機構を有する略台状体で形成され、各リンク部材の相対位置関係の調整で地盤垂直方向寸法を変更可能とされて受圧フレーム２１間のワイヤ２２が複数本交差する位置に配置されてなり、さらに、押圧用フレーム２３と各ワイヤ２２との間に配設されて押圧用フレーム２３とワイヤ２２の相互間の圧力状態を検知する圧力検知手段（図示を省略）と、この圧力検知手段で検知された押圧用フレーム２３とワイヤ２２間の圧力状態に応じて押圧用フレーム２３をなす各リンク部材の相対位置関係を変化させる寸法調整手段２５とを備える構成を有するものである。
【００３９】
前記受圧フレーム２１は、前記第１の実施形態と同様、平面形状が略六角形となる中空の鋼板製略箱状体で形成され、この略箱状体の中心に中心孔（図示を省略）を備える構成である。受圧フレーム２１の地盤表面への配設パターンは、前記第１の実施形態と異なり、受圧フレーム２１がない位置でワイヤ２２の交差部分が生じる配置となっている。
【００４０】
前記ワイヤ２２は、前記第１の実施形態と同様の鋼線であり、両端部を対向する受圧フレーム２１の側面にそれぞれ固定されて受圧フレーム２１間に張り渡される構成である。ただし、受圧フレーム２１間に張り渡されるワイヤ２２は、受圧フレーム２１の配設パターン変更に伴い、各受圧フレーム２１間の地盤表面上で複数本交差した状態となる。
【００４１】
前記押圧用フレーム２３は、複数のリンク部材の組合わせで略パンタグラフ状のリンク機構をなし、且つ地盤表面側に充填用袋２４の収納部分を有する略台状体として形成され、受圧フレーム２１間の複数ワイヤ２２が交差する箇所で各ワイヤ２２と地盤５０表面との間に配置され、各リンク部材の相対位置関係の調整で地盤垂直方向寸法を変更可能とされてなる構成である。押圧用フレーム２３の上部には、ワイヤ２２を係合させるワイヤ保持部２３ａが複数形成され、押圧用フレーム２３をワイヤ２２と地盤５０表面との間から外れないように拘束できる仕組みである。また、このワイヤ保持部２３ａにおける各ワイヤ２２との接触位置には、押圧用フレーム２３とワイヤ２２の相互間の圧力状態を検知する前記圧力検知手段が配設される。
【００４２】
前記充填用袋２４は、前記第１の実施形態同様、所定の充填材を充填される中空袋状体で形成され、押圧用フレーム２３と地盤５０表面との間に配設され、内部に充填材を所定量充填されて所定の膨張状態まで膨張し、最終的に硬化して膨張状態を維持する構成である。この充填用袋２４の充填量を調整して、押圧用フレーム２３の地盤５０への設置状態における押圧用フレーム２３と地盤５０表面との間隔を適宜設定できる仕組みである。
【００４３】
前記寸法調整手段２５は、押圧用フレーム２３の所定のリンク部材間に配設され、前記圧力検知手段から出力された押圧用フレーム２３とワイヤ２２間の圧力状態についての情報を受け、この圧力状態の変化に応じて押圧用フレーム２３をなす前記各リンク部材の相対位置関係を変化させ、押圧用フレーム２３の地盤垂直方向寸法を自動的に調整する構成である。
【００４４】
次に、前記構成に基づく地盤保持構造の設置及び設置後の荷重伝達状態について説明する。まず、受圧フレーム２１、ワイヤ２２、押圧用フレーム２３、及び充填用袋２４を、それぞれ別々に現場に搬入する。そして、あらかじめ充填用袋２４を押圧用フレーム２３の収納空間に収納し、押圧用フレーム２３と一体化しておく。この後、受圧フレーム２１を、アンカー引張部材１０の地上露出部分が受圧フレーム２１の中心孔に通る状態として、アンカー引張部材１０打設箇所にそれぞれ載置する。
【００４５】
また、押圧用フレーム２３を地盤表面における各受圧フレーム２１間の各ワイヤ２２が交差する所定位置に載置し、この押圧用フレーム２３上のワイヤ保持部２３ａに各ワイヤ２２をそれぞれ係合させた状態でワイヤ２２の両端部を受圧フレーム２１各側面に固定する。
この後、所定の充填材充填で受圧フレーム２１内部を埋めた後、受圧フレーム２１をアンカー引張部材１０と定着させて受圧フレーム２１を地盤５０に固定する。
【００４６】
さらに、受圧フレーム２１内部が硬化した後、充填用袋２４に所定の充填材を充填して膨張させ、地盤の不陸状態に合わせて膨張状態を調整し、地盤５０に対し適切な接地状態とすると共に、押圧用フレーム２３と地盤５０との間隙を調整し、ワイヤ２２における緊張力を増大させ、ワイヤ２２の緊張力の地盤表面側方向成分を押圧用フレーム２３及び充填用袋２４から押圧力として地盤５０へ伝達できる状態とすれば、地盤５０への設置完了となる。
【００４７】
続いて、この本実施の形態に係る地盤保持構造における荷重伝達状態について説明する。地盤５０表面への定着状態で、アンカー引張部材１０に一体に固定されている受圧フレーム２１において、アンカー引張部材１０の緊張力が、受圧フレーム２１上面を経て地盤表面側に向う力として伝達され、最終的に受圧フレーム２１の下面から地盤５０へ押圧力として加わり、地盤５０を保持可能となる。
【００４８】
また、ワイヤ２２に生じている緊張力のうち、地盤表面側方向成分が、ワイヤ２２の地盤寄りに配置されている押圧用フレーム２３に地盤表面側に向う力として伝わる。こうして押圧用フレーム２３に伝わった地盤表面側に向う力が、膨張状態の充填用袋２４に伝わり、さらに充填用袋２４の下面から地盤５０表面に押圧力として加わり、地盤５０を保持する。
【００４９】
地盤に生じた変化で、ワイヤ２２に生じている緊張力が変化すると（図６（Ａ）参照）、ワイヤ２２と押圧用フレーム２３との間の圧力変化をワイヤ保持部２３ａの圧力検知手段（図示を省略）が検知し、圧力変化の情報を寸法調整手段２５に出力する。寸法調整手段２５は圧力変化に応じて押圧用フレーム２３の各リンク部材の相対位置関係を変化させ、押圧用フレーム２３の地盤垂直方向寸法を自動的に調整し、ワイヤ２２の緊張力をあらかじめ設定された範囲内に維持する（図６（Ｂ）参照）こととなり、地盤５０の変化に確実に対応できる。
【００５０】
このように、本実施の形態に係る地盤保持構造においては、押圧用フレーム２３が複数のリンク部材の組合わせで地盤垂直方向寸法を調整可能に形成されると共に、押圧用フレーム２３とワイヤ２２との間の圧力状態を検知する圧力検知手段が配設され、さらにこの圧力検知手段の検知結果に基づいて押圧用フレーム２３の各リンク部材の相対位置関係を変化させる寸法調整手段２５が配設され、押圧用フレーム２３とワイヤ２２間の圧力変化に応じて寸法調整手段２５が押圧用フレーム２３の各リンク部材の相対位置関係を変化させ、押圧用フレーム２３の地盤垂直方向寸法を調整してワイヤ２２の緊張状態を変化させられることから、押圧用フレーム２３配設位置における地盤５０の状態が変化してワイヤ２２の緊張力が変化すると、これに伴って押圧用フレーム２３の地盤垂直方向寸法が自動調整されてワイヤ２２の緊張状態を所定範囲内に維持できることとなり、地盤５０の変化に対応してワイヤ２２の緊張力に基づく地盤５０への押圧力を常に最適な状態に人手を経ずに調整でき、保守の手間をかけずに長期にわたり安全に地盤５０を保持できる。また、押圧用フレーム２３を複数のワイヤ２２の交差する位置に配設し、各充填用袋２４を膨張させて複数のワイヤ２２をまとめて緊張させることから、押圧用フレーム２３に複数のワイヤ２２の緊張力に基づく地盤５０側への大きな力を発生させられることとなり、押圧用フレーム２３から充填用袋２４を介して強い押圧力を地盤５０に与えられ、確実に地盤５０を押圧保持できる。
【００５１】
なお、前記第２の実施形態に係る地盤保持構造においては、圧力検知手段で得られた押圧用フレーム２３とワイヤ２２との間の圧力状態に関する情報は直接寸法調整手段２５に出力され、寸法調整手段が得られた情報に基づいて押圧用フレーム２３の各リンク部材の相対位置関係を変化させる構成としているが、これに限らず、圧力検知手段が、押圧用フレーム２３とワイヤ２２との間の圧力状態を検知して外部の管理手段に送信すると共に、寸法調整手段２５が、管理手段からの遠隔操作に基づいて押圧用フレーム２３の各リンク部材の相対位置関係を変化させ、押圧用フレーム２３の地盤垂直方向寸法を調整する構成とすることもでき、前記第２の実施形態同様、地盤の状態変化で緊張材の緊張力が変化しても、押圧用フレームの地盤垂直方向寸法が自動調整されて緊張材の緊張状態を所定範囲内に維持できることとなり、緊張力に基づく地盤への押圧力を常に最適な状態に人手を経ずに調整でき、保守の手間をかけずに長期にわたり安全に地盤を保持できる。
【００５２】
また、前記第１及び第２の各実施の形態に係る地盤保持構造においては、受圧フレーム１１、２１の平面形状を六角形とする構成としているが、これに限らず、四角形や三角形など他の多角形形状、あるいは円形など、所定長さ連続する平面又は曲面部分が外側面に位置してワイヤ１２、２２端部を固定可能となる形状の部材を用いる構成とすることもでき、地盤５０への配設パターンに応じた適切な形状を選択できる。また、ワイヤ１２、２２の配置も前記構成に限らず、受圧フレーム１１、２１の一又は複数の側面のみにワイヤ１２、２２端部を固定し、全ての側面にワイヤ２２を固定しない構成とすることもできる。
【００５３】
また、前記第１及び第２の各実施の形態に係る地盤保持構造においては、受圧フレーム１１、２１、押圧用フレーム１３などをいずれも鋼板製とする構成としているが、これに限らず、他の金属材料を用いたり、軽量で強度の高いＦＲＰ製、あるいはセラミック・ガラス・コンクリート製としたりすることもできる。ワイヤ１２、２２についても、いずれも鋼線とする構成としているが、これに限らず、軽量で引張強度の高い炭素繊維やアラミド繊維等の単線又は撚り線とすることもできる。さらに、膨張体として内部に充填材を充填されることで膨張する充填用袋１４、２４を用いているが、これに限らず、水や薬剤等を作用させると所定の大きさに膨張する素材等を用いることもできる。
【００５４】
また、前記第１及び第２の各実施の形態に係る地盤保持構造において、受圧フレーム１１、２１は、人手で持運び可能な程度に軽量であり、内部に充填材を入れて硬化させた状態で所定の強度を得る構成としているが、これに限らず、受圧フレーム１１、２１を当初から高い強度を有する構成とすることもでき、受圧フレーム１１、２１設置後、受圧フレーム１１、２１内部に充填材を入れて硬化させる（養生する）期間を省略してアンカー引張部材１０と一体化できると共に、続いて受圧フレーム１１、２１間の押圧用フレーム１３、２３位置での充填用袋１４、２４に対する充填材の充填及び硬化の作業をすぐに行うことができ、施工期間の短縮が図れる。
【００５５】
また、前記第１及び第２の各実施の形態に係る地盤保持構造においては、各受圧フレーム１１、２１間に独立したワイヤ１２、２２を配設し、両端を各受圧フレーム１１、２１に固定する構成としているが、一本のワイヤ１２、２２が受圧フレーム１１、２１を貫通して二つ以上の受圧フレーム１１、２１間にわたって張り渡される構成とすることもできる。
【００５６】
【発明の効果】
以上のように本発明によれば、地盤表面に所定間隔で配設された複数の受圧フレーム間に緊張材を張り渡し、この緊張材の中間位置に押圧用フレーム及び膨張体を組合わせて配設し、膨張体の膨張で受圧フレーム間の緊張材を緊張させ、緊張材下側の押圧用フレームや膨張体を介して地盤に押圧力を与えることにより、受圧フレーム配設位置に加えて各受圧フレーム間の各押圧用フレーム配設位置でも地盤を保持できることとなり、小型の受圧フレームを用いても地盤の保持面積を十分確保して確実に地盤を保持でき、必要な各部材を人手で搬入可能として従来施工が難しかった状況でも施工可能となり、様々な工事箇所に適用できると共に、地盤の凹んだ部分にも押圧用フレームで押圧力を与えて保持可能であり、地盤の不陸への追随性にも優れ、地盤の保持だけでなく地盤の崩壊を抑えるためのプレストレスも積極的に導入できるという効果を奏する。加えて、アンカー引張部材の張力を抑えて受圧フレームの強度及び地盤保持力を弱めた場合でも、また、アンカー引張部材及び受圧フレームの設置数を低減した場合でも、受圧フレームと緊張材及び押圧用フレームを組合わせることで十分な地盤保持が行え、経済性に優れた地盤保持が可能となる。
【００５７】
また、本発明によれば、膨張体として充填用袋が地盤表面と押圧用フレーム間に配設され、充填用袋への充填材の充填で受圧フレーム間の緊張材を緊張させ、押圧用フレームや充填用袋を介して地盤に押圧力を与えることにより、充填用袋への充填量の調整で容易に緊張材の緊張状態、すなわち押圧用フレーム位置での押圧力の調整が行え、各受圧フレーム間各位置における地盤保持状態を最適化できると共に、充填材を充填される柔軟な充填用袋が地盤表面に密着して地盤の不陸に細かく対応することとなり、押圧力を適切に地盤に伝えられ、確実に地盤を保持できるという効果を有する。加えて、充填用袋への充填材の充填作業は比較的容易であり、作業全体の能率向上とコストダウンも図れるという効果を有する。
【００５８】
また、本発明によれば、押圧用フレームとして略箱状体が緊張材と地盤表面との間に配設され、内部の収納空間に収納した膨張体を介して地盤表面に緊張材の緊張力を押圧力として伝えることにより、簡略な構造で効果的に地盤を押圧でき、搬入しやすいと共に、コストダウンが図れるという効果を有する。
また、本発明によれば、押圧用フレームが複数のリンク部材の組合わせで地盤垂直方向寸法を調整可能に形成され、緊張材と地盤表面との間への配設状態で押圧用フレームの地盤垂直方向寸法を調整して緊張材の緊張状態を変化させられることにより、緊張材の緊張力に基づく地盤への押圧力を調整できることとなり、膨張体の膨張状態調整と合わせて地盤の押圧状態を最適な状態に調整できるという効果を有する。
【００５９】
また、本発明によれば、押圧用フレームと緊張材との間の圧力状態を検知する圧力検知手段が配設されると共に、圧力検知手段の検知結果に基づいて押圧用フレームの各リンク部材の相対位置関係を変化させる寸法調整手段が配設され、押圧用フレームと緊張材間の圧力変化に応じて寸法調整手段が押圧用フレームの各リンク部材の相対位置関係を変化させ、押圧用フレームの地盤垂直方向寸法を調整することにより、押圧用フレーム配設位置における地盤の状態が変化して緊張材の緊張力が変化すると、これに伴って押圧用フレームの地盤垂直方向寸法が自動調整されて緊張材の緊張状態を所定範囲内に維持できることとなり、地盤の変化に対応して緊張力に基づく地盤への押圧力を常に最適な状態に人手を経ずに調整でき、保守の手間をかけずに長期にわたり安全に地盤を保持できるという効果を有する。
【００６０】
また、本発明によれば、押圧用フレームと緊張材との間の圧力状態を検知して外部の管理手段に送信する圧力検知手段が配設されると共に、管理手段からの遠隔操作に基づいて押圧用フレームの各リンク部材の相対位置関係を変化させる寸法調整手段が配設され、押圧用フレームと緊張材間の圧力変化に応じて寸法調整手段が押圧用フレームの各リンク部材の相対位置関係を変化させ、押圧用フレームの地盤垂直方向寸法を調整することにより、押圧用フレーム配設位置における地盤の状態が変化して緊張材の緊張力が変化すると、これに伴って押圧用フレームの地盤垂直方向寸法が自動調整されて緊張材の緊張状態を所定範囲内に維持できることとなり、地盤の変化に対応して緊張力に基づく地盤への押圧力を常に最適な状態に人手を経ずに調整でき、保守の手間をかけずに長期にわたり安全に地盤を保持できるという効果を有する。
【００６１】
また、本発明によれば、押圧用フレームを複数の緊張材の交差する位置に配設し、各膨張体を膨張させて複数の緊張材をまとめて緊張させることにより、押圧用フレームに複数の緊張材の緊張力に基づく地盤側への大きな力を発生させられることとなり、押圧用フレームから膨張体を介して強い押圧力を地盤に与えられ、確実に地盤を押圧保持できるという効果を有する。
【００６２】
また、本発明によれば、受圧フレームが略箱状体とされ、地盤表面への設置後に受圧フレーム内部へ充填材を充填して、受圧フレームの重量及び強度を高めることにより、緊張材端部を固定する受圧フレームの強度を高めて緊張材により大きな緊張力を発生させることができ、地盤への押圧力をさらに高めて地盤保持の信頼性を高められるという効果を有する。
【図面の簡単な説明】
【図１】本発明の第１の実施形態に係る地盤保持構造の平面図及び要部側面図である。
【図２】本発明の第１の実施形態に係る地盤保持構造における受圧フレーム及び押圧用フレームの斜視図である。
【図３】本発明の第１の実施形態に係る地盤保持構造におけるワイヤ緊張前状態及びワイヤ緊張状態説明図である。
【図４】本発明の第２の実施形態に係る地盤保持構造の平面図である。
【図５】本発明の第２の実施形態に係る地盤保持構造における押圧用フレームの平面図及び側面図である。
【図６】本発明の第２の実施形態に係る地盤保持構造における地盤変化によるワイヤ弛緩状態及びワイヤ再緊張状態説明図である。
【図７】従来の受圧フレームの平面図である。
【図８】従来の受圧フレームの横断面図である。
【符号の説明】
１０アンカー引張部材
１１、２１受圧フレーム
１１ａ、１０１ａ中心孔
１２、２２ワイヤ
１３、２３押圧用フレーム
１３ａワイヤ保持溝
１４、２４充填用袋
２３ａワイヤ保持部
２５寸法調整手段
５０地盤
１０１コア部
１０２アーム部
１０３底板[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ground holding structure using a ground anchor.
[0002]
[Prior art]
In order to prevent the occurrence of landslides due to ground collapse, etc., on the slopes or slopes that have been created, construction has been widely performed to stabilize the ground with ground anchors.
The conventional method of installing a ground anchor is to insert an anchor tension member made of steel wire or the like into the ground and fix one end of the anchor in the ground, while exposing the other end of the anchor tension member to the ground. After the concrete pedestal pedestal is installed on the ground surface, the anchor tension member is fixed to the anchor pedestal integrally with the anchor tensioned member until a predetermined tension is obtained. It is a mechanism for stably holding the ground by transmitting the tension of the anchor tension member from the anchor base to the ground.
[0003]
However, because the anchor pedestal used in the conventional ground anchor installation work is made of concrete, it is very heavy and can only be transported and installed without using heavy equipment such as large trucks and large cranes. There was a problem that it was impossible to lift and install the anchor pedestal up to the top of the slope at a narrow construction site.
[0004]
In order to solve such a problem, a pressure receiving frame in which steel plates are combined in a box shape instead of concrete has recently been used as an anchor base. One example is described in Design Registration No. 1058390, which is shown in FIGS. FIG. 7 is a plan view of a conventional pressure receiving frame, and FIG. 8 is a cross-sectional view of the conventional pressure receiving frame.
[0005]
The conventional pressure receiving frame 100 shown in each of the drawings is formed of a substantially box-shaped core portion 101 having a through-hole center hole 101 a and a hollow substantially box-shaped body similar to the core portion 101. A configuration including four arm portions 102 arranged in a cross shape and fixed integrally with the core portion 101, and a substantially square bottom plate 103 fixed integrally to the core portion 101 and the ground surface side of the arm portion 102. It is.
[0006]
The pressure receiving frame 100 having the above-described structure is lighter than concrete while having sufficient strength, and can be installed even with a small heavy machine that enters a narrow construction site, thereby eliminating the restriction on the installation location. In addition, after installation, if necessary, the inner hollow portion can be filled with a filler such as concrete to further increase the strength and the ground holding force.
[0007]
[Problems to be solved by the invention]
Since the conventional ground anchor pressure receiving frame is constructed as described above, it is not as large as a concrete anchor pedestal, but it is heavy, cannot be divided into large shapes, and cannot be assembled on site. It is difficult to install a pressure receiving frame on the slope at a construction site where the working conditions cannot be reached because the work machine cannot be reached without using a crane or a crane.
[0008]
In recent years, it has been proposed to apply such a ground anchor to the ground holding at a slope where the ground holding force is smaller. In this case, even if the ground holding force is smaller than the conventional, The frame is required to be lighter and easier to carry in, but the conventional pressure receiving frame is larger than necessary and heavy in weight, is difficult to handle, and has excessive strength against the applied ground. As a result, the cost is increased, and it is difficult to use in reality.
[0009]
Furthermore, in the conventional ground anchor, as a general rule, the ground is held only by the anchor pedestal integrated with the anchor tension member and the ground contact portion of the pressure receiving frame, and depending on the ground, it is held by the pressure receiving frame per unit area. If the area ratio is small, the ground retention may be insufficient, so simply hold the pressure receiving frame by increasing the size of the pressure receiving frame or increasing the number of anchor tension members and pressure receiving frames installed. In general, the ratio of the area to be used was increased, but the larger size of the pressure receiving frame made it difficult to work, the efficiency of the entire anchor work decreased, and the number of pressure receiving frames installed increased. There was a problem that the length of the period was prolonged and the cost of the entire construction was increased.
[0010]
The present invention has been made in order to solve the above problems, and has a structure in which a portion for holding the ground is dispersed into a plurality of parts, while ensuring a sufficient holding area for the ground, enabling the weight of each holding portion to be reduced. The purpose of the present invention is to provide a ground holding structure that can be easily brought into the building, ease the installation conditions, and reduce the labor and cost of the entire construction.
[0011]
[Means for Solving the Problems]
The ground holding structure according to the present invention includes at least a pressure receiving frame installed on the surface of the ground in a state of being fixed integrally with the ground exposed portion of the other end side of the anchor tension member whose one end is fixed in the ground. In the ground holding structure for holding the ground by pressing the ground surface with the pressure receiving frame, a plurality of the pressure receiving frames are arranged at predetermined intervals on the ground in a state of being integrated with the anchor pulling member, One or a plurality of substantially linear tension members that are stretched between opposing pressure receiving frames that are fixed to each other, and at least the tension material that moves in a direction away from the ground surface in contact with the tension material within a predetermined range One or more disposed on the ground surface between each pressure receiving frame in a state of being restrained by A substantially box-shaped body having one end face toward the ground surface side open and a predetermined storage space inside. Ground surface side Have A pressing frame, and a predetermined expansion body that is stored in the storage space of the pressing frame and is disposed between the pressing frame and the ground surface, and is expandable to a predetermined volume, The inflatable body is formed of a substantially bag-like filling bag having flexibility, and a predetermined filler is placed in the grounding bag disposed between the pressing frame and the ground surface. While filling to a predetermined inflated state that matches the inland state, the filling bag is brought into close contact with the ground surface and cured. The pressing frame is moved together with the tendon material by a predetermined distance in a direction away from the ground surface to tension the tendon material, and the tendon material generates a ground surface side direction component of the tension force.
[0012]
As described above, in the present invention, a tension material is stretched between a plurality of pressure receiving frames disposed at predetermined intervals on the ground surface, and a pressing frame and an expansion body are combined and disposed at an intermediate position of the tension material. Each of the pressure receiving frames in addition to the position of the pressure receiving frame is provided by tensioning the tension material between the pressure receiving frames by the expansion of the expansion body and applying a pressing force to the ground via the pressing frame or the expansion body below the tension material. It is possible to hold the ground even at the position of each pressing frame in between, and even with a small pressure receiving frame, it is possible to secure the ground by securing a sufficient holding area of the ground and make it possible to carry in each necessary member manually It can be applied even in situations where it was difficult to perform conventional construction, and can be applied to various construction sites, and it can also be held by applying pressing force to the recessed part of the ground with a pressing frame, making it possible to follow the unevenness of the ground Excellent, pre-stress for suppressing the collapse of the ground as well as retention of the ground can be actively introduced. In addition, even if the tension of the anchor tension member is suppressed to weaken the strength of the pressure receiving frame and the ground holding force, or even if the number of anchor tension members and pressure receiving frames is reduced, the pressure receiving frame, the tension material, and the pressing By combining the frames, it is possible to maintain sufficient ground, and it is possible to maintain the ground with excellent economic efficiency.
[0013]
In addition, a filling bag is disposed as an inflating body between the ground surface and the pressing frame, and the tension material between the pressure receiving frames is tensioned by filling the filling bag with the filling material, and the filling bag is interposed between the pressing frame and the filling bag. By applying a pressing force to the ground, the tension of the tension material can be easily adjusted by adjusting the filling amount in the filling bag, that is, the pressing force can be adjusted at the position of the pressing frame. The holding state can be optimized, and the flexible filling bag filled with the filler closely contacts the ground surface to respond finely to the unevenness of the ground, so that the pressing force can be properly transmitted to the ground and surely the ground Can be held. In addition, the filling operation of the filling material into the filling bag is relatively easy, and the efficiency of the entire operation can be improved and the cost can be reduced.
[0014]
In addition, a substantially box-shaped body is arranged between the tension material and the ground surface, and the tension force of the tension material is transmitted as a pressing force to the ground surface via the expansion body stored in the internal storage space. The structure can effectively press the ground, making it easy to carry in and reducing costs.
[0015]
In addition, the ground holding structure according to the present invention, if necessary, the pressing frame, On the upper side of the substantially box-shaped body Has a link mechanism that combines multiple link members. And The ground vertical dimension can be changed by adjusting the relative positional relationship of each link member in the arrangement state on the ground surface, and the tension state of the tendon is adjusted by changing the ground vertical dimension.
[0016]
Thus, in the present invention, the pressing frame is formed so that the vertical dimension of the ground can be adjusted by a combination of a plurality of link members, and the ground of the pressing frame is disposed between the tension material and the ground surface. By adjusting the vertical dimension and changing the tension state of the tendon material, the pressing force to the ground based on the tension force of the tendon material can be adjusted, and the pressing state of the ground can be adjusted together with the expansion state adjustment of the expansion body. It can be adjusted to the optimum state.
[0017]
Further, the ground holding structure according to the present invention is disposed at one or a plurality of predetermined positions between the pressing frame and the tension material, as necessary, and between the pressing frame and the tension material at the predetermined position. A predetermined pressure detecting means for detecting the pressure state of the pressure frame and a predetermined link member of the pressing frame, and for pressing according to the pressure state between the pressing frame and the tension material detected by the pressure detecting means. And a predetermined dimension adjusting means for changing a relative positional relationship between the link members forming the frame.
[0018]
As described above, in the present invention, the pressure detecting means for detecting the pressure state between the pressing frame and the tendon is disposed, and the link members of the pressing frame are determined based on the detection result of the pressure detecting means. A dimension adjusting means for changing the relative positional relationship is provided, and the dimension adjusting means changes the relative positional relationship of each link member of the pressing frame in accordance with a pressure change between the pressing frame and the tension member, By adjusting the ground vertical dimension, if the ground state at the pressing frame placement position changes and the tension of the tendon changes, the ground vertical dimension of the pressing frame is automatically adjusted accordingly. The tension state of the tension material can be maintained within the predetermined range, and the pressing force on the ground based on the tension force can be adjusted to the optimum state without manual intervention in response to changes in the ground. During it can be held safely soil for a long time without the.
[0019]
Further, the ground holding structure according to the present invention is disposed at one or a plurality of predetermined positions between the pressing frame and the tension material, as necessary, and between the pressing frame and the tension material at the predetermined position. Is arranged between a predetermined pressure detecting means for detecting the pressure state and transmitting the acquired information to an external management means and a predetermined link member of the pressing frame, and is pressed based on a remote operation from the management means. And a predetermined dimension adjusting means for changing the relative positional relationship between the link members forming the working frame.
[0020]
As described above, in the present invention, the pressure detection means for detecting the pressure state between the pressing frame and the tendon and transmitting it to the external management means is provided, and based on the remote operation from the management means. A dimension adjusting means for changing the relative positional relationship between the link members of the pressing frame is provided, and the dimension adjusting means is arranged to change the relative positional relationship between the link members of the pressing frame according to a pressure change between the pressing frame and the tension member. By changing the vertical direction dimension of the ground for the pressing frame, the ground state at the position where the pressing frame is disposed changes, and the tension of the tension material changes accordingly. The vertical dimension is automatically adjusted to maintain the tension state of the tendon within the specified range, and the pressing force to the ground based on the tension force is always kept in an optimal state corresponding to the change of the ground. It can be adjusted without undergoing safely can hold soil for a long time without the hassle of maintenance.
[0021]
In the ground holding structure according to the present invention, if necessary, the arrangement position of the pressing frame is set as a point where a plurality of tendons stretched between the pressure receiving frames intersect.
As described above, in the present invention, the pressing frame is disposed at a position where the plurality of tension members intersect, and each expansion body is inflated to collectively tension the plurality of tension members. A large force to the ground side based on the tension force of the tension material can be generated, and a strong pressing force is applied to the ground from the pressing frame via the expanding body, so that the ground can be surely pressed and held.
[0022]
In the ground holding structure according to the present invention, if necessary, the pressure receiving frame is formed of a substantially box-shaped body having a predetermined polygonal planar shape, and a predetermined filler is filled in the interior after installation on the ground surface. And the said filler can be hardened.
As described above, in the present invention, the pressure receiving frame has a substantially box-like body, and after the installation on the ground surface, the pressure receiving frame is filled with the filler, thereby increasing the weight and strength of the pressure receiving frame, thereby the end of the tension material It is possible to increase the strength of the pressure receiving frame for fixing the belt and to generate a large tension force with the tension material, and further increase the pressing force to the ground to increase the reliability of the ground holding.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment of the present invention)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view and a side view of a main part of a ground holding structure according to this embodiment, FIG. 2 is a perspective view of a pressure receiving frame and a pressing frame in the ground holding structure according to this embodiment, and FIG. 3 is according to this embodiment. It is a wire tension state explanatory drawing in a ground maintenance structure.
[0024]
In each of the drawings, a plurality of ground holding structures according to the present embodiment are arranged at predetermined intervals on the surface of the ground 50 in a state of being fixed integrally with the ground exposed portion of the anchor tension member 10 fixed to the ground 50. A box-shaped pressure receiving frame 11, a wire 12 as a tension member having an end fixed to each pressure receiving frame 11 and stretched between the pressure receiving frames 11, and each wire 12 in contact with the wires 12 In the state where the movement in the direction away from the surface of the ground 50 is constrained within a predetermined range, a plurality of the ground receiving surfaces 11 between the pressure receiving frames 11 are arranged on the surface of the ground 50 and a predetermined storage space is opened on the surface of the ground 50. And a filling bag 14 as an inflating body disposed between the pressing frame 13 and the ground 50 surface.
[0025]
The pressure receiving frame 11 is formed of a hollow steel plate-like substantially box-shaped body having a substantially hexagonal plane shape, and a predetermined cylinder is formed inside the substantially box-shaped body at both upper and lower surfaces of the box-shaped body. Each of the through holes communicating with the inside of the cylindrical body is formed in the upper and lower surfaces of the substantially box-like body, and the upper and lower through holes and the inside of the cylindrical body are part of the anchor tension member 10. The center hole 11a passes through (see FIG. 2A).
[0026]
The pressure receiving frame 11 has a ground exposed portion on the other end side of the anchor tension member 10 with respect to the anchor tension member 10 which is fixed at one end in the ground 50 and is exposed with the other end exposed to the ground. It is disposed on the surface of the ground 50 in a state of passing through the center hole 11a, filled with a predetermined filler inside, and then integrated with the other end of the anchor pulling member 10 that has passed through the center hole 11a. 50 is a mechanism fixed to the surface. In addition, the pressure receiving frame 11 has a light-weight structure that can be carried manually by a person before filling with the filler, and can be easily carried into the site and has excellent workability.
[0027]
Each of the wires 12 is a steel wire having a predetermined tensile strength, and has both ends fixed to the side surfaces of the pressure receiving frame 11 facing each other and stretched between the pressure receiving frames 11 in a predetermined tension state. The fixing position of the end portion of the wire 12 on the side surface of the pressure receiving frame 11 can be changed according to the number of wires 12 stretched between the pressure receiving frames 11 and the load (tension force) applied to the wires 12. The fixing method of the end of the wire 12 is not only fixed to the side surface of the pressure receiving frame 11 by bolting, wedge insertion, welding, or the like, but also by integration with a filler that hardens in the pressure receiving frame 11.
[0028]
The pressing frame 13 is formed of a substantially steel plate box-shaped body having one end face open and having the storage space therein, and the intermediate position of the wire 12 and the ground 50 surface with the open end side facing the ground surface side. It is the structure arrange | positioned between. A plurality of wire holding grooves 13a for engaging the wire 12 are formed on the upper portion of the pressing frame 13, and the pressing frame 13 can be restrained so as not to come off between the wire 12 and the ground 50 surface ( (See FIG. 2B).
[0029]
The filling bag 14 is formed of a hollow bag-like body filled with a predetermined filler, and is stored in a storage space in the pressing frame 13 and is disposed between the pressing frame 13 and the ground 50 surface. The inside is filled with a predetermined amount of filler, expands to a predetermined expanded state, and finally cures to maintain the expanded state. When the filling bag 14 is inflated, the pressing frame 13 is moved together with the wire 12 in a direction away from the surface of the ground 50 to tension the wire 12, and the wire 12 generates a ground surface side direction component of tension. .
[0030]
Next, installation of the ground holding structure based on the above configuration and a load transmission state after installation will be described. First, the pressure receiving frame 11, the wire 12, the pressing frame 13, and the filling bag 14 are separately carried into the site. Then, the filling bag 14 is stored in advance in the storage space of the pressing frame 13 and integrated with the pressing frame 13. Thereafter, the pressure receiving frame 11 is placed on the anchor tension member 10 placement site in a state where the ground exposed portion of the anchor tension member 10 passes through the center hole 11a of the pressure receiving frame 11.
[0031]
Further, the pressing frame 13 is placed at a predetermined position between the pressure receiving frames 11 on the ground surface, and both ends of the wire 12 are engaged with the wire holding groove 13a on the pressing frame 13 at the intermediate position of the wire 12. The part is fixed to each side surface of the pressure receiving frame 11.
Thereafter, after filling the pressure receiving frame 11 with a predetermined filling material, the pressure receiving frame 11 is fixed to the anchor tension member 10 and the pressure receiving frame 11 is fixed to the ground 50.
[0032]
Further, after the inside of the pressure receiving frame 11 is cured, the filling bag 14 is filled with a predetermined filler and inflated, the gap between the pressing frame 13 and the ground 50 is adjusted, and the tension in the wire 12 is increased. If the ground surface side direction component of the tension of the wire 12 can be transmitted from the pressing frame 13 and the filling bag 14 to the ground 50 as a pressing force, the installation on the ground 50 is completed (see FIG. 3B). .
[0033]
Next, the load transmission state in the ground holding structure according to this embodiment will be described. In the pressure receiving frame 11 that is integrally fixed to the anchor tension member 10 in a fixed state on the surface of the ground 50, the tension of the anchor tension member 10 is transmitted as a force toward the ground surface side through the upper surface of the pressure receiving frame 11, Finally, a pressing force is applied from the lower surface of the pressure receiving frame 11 to the ground 50 so that the ground 50 can be held.
[0034]
Further, among the tension force generated in the wire 12, the ground surface side direction component is transmitted to the pressing frame 13 disposed near the ground of the wire 12 as a force directed toward the ground surface side. The force directed to the ground surface side transmitted to the pressing frame 13 is transmitted to the filling bag 14 in an inflated state and further applied as a pressing force from the lower surface of the filling bag 14 to the surface of the ground 50, thus pressing the surface of the ground 50. Hold the ground 50.
[0035]
Thus, in the ground holding structure according to the present embodiment, the wire 12 is stretched between the plurality of pressure receiving frames 11 arranged on the surface of the ground 50 at a predetermined interval, and a substantially box-like shape is provided at an intermediate position of the wire 12. The pressing frame 13 and the filling bag 14 are disposed, and the wire 12 between the pressure receiving frames 11 is tensioned by the expansion of the filling bag 14 due to the filling of the filling material. Since the pressing force is applied to the ground 50 via the bag 14, the ground 50 can be held not only at the position of the pressure receiving frame 11 but also at the position of the pressing frame 13, even if the small pressure receiving frame 11 is used. It is possible to secure the ground 50 by securing a sufficient holding area of the ground 50, and it can be constructed even in situations where it was difficult to perform conventional construction as each member required can be carried in manually. It can be applied to various places, and can be held by applying a pressing force to the recessed portion of the ground 50 with the wire 12, the pressing frame 13 and the filling bag 14, and the ground 50 is excellent in following the unevenness. In addition to preserving the ground 50, prestress for suppressing the collapse of the ground 50 can be positively introduced. In addition, by adjusting the filling amount of the filling bag 14, the pressing force can be easily adjusted at the position of the pressing frame 13, the ground holding state at each position between the pressure receiving frames 11 can be optimized, and flexible The filling bag 14 made of a functional material is in close contact with the surface of the ground 50 due to the filling of the filler, and copes with fine unevenness of the ground 50, so that the pressing force can be appropriately transmitted to the ground 50.
[0036]
In the ground holding structure according to the first embodiment, a single pressing frame 13 is disposed between the pressure receiving frames 11. However, the configuration is not limited to this, and a plurality of positions between the pressure receiving frames 11 are provided. Further, the pressing frame 13 can be provided respectively, and the ground 50 between the pressure receiving frames 11 can be pressed and held at a plurality of locations.
[0037]
(Second embodiment of the present invention)
A second embodiment of the present invention will be described with reference to FIGS. 4 is a plan view of the ground holding structure according to the present embodiment, FIG. 5 is a plan view and a side view of the pressing frame in the ground holding structure according to the present embodiment, and FIG. 6 is a ground in the ground holding structure according to the present embodiment. It is explanatory drawing of the wire relaxation state and wire re-tension state by a change.
[0038]
In each of the drawings, the ground holding structure according to the present embodiment includes a pressure receiving frame 21, a wire 22, a pressing frame 23, and a filling bag 24, as in the first embodiment. The pressing frame 23 is formed of a substantially trapezoidal body having a link mechanism in which a plurality of link members are combined, and the vertical dimension of the ground can be changed by adjusting the relative positional relationship between the link members. The wire 22 is arranged at a position where a plurality of wires 22 cross each other, and is further disposed between the pressing frame 23 and each wire 22 to detect the pressure state between the pressing frame 23 and the wire 22. The relative position of each link member forming the pressing frame 23 according to the pressure state between the detection frame (not shown) and the pressure frame 23 and the wire 22 detected by the pressure detection unit And it has a configuration and a size adjustment means 25 for varying the engagement.
[0039]
As in the first embodiment, the pressure receiving frame 21 is formed of a hollow steel plate-like substantially box-like body whose planar shape is substantially hexagonal, and a center hole (not shown) at the center of the substantially box-like body. It is the structure provided with. Unlike the first embodiment, the arrangement pattern of the pressure receiving frame 21 on the ground surface is an arrangement in which a crossing portion of the wires 22 is generated at a position where the pressure receiving frame 21 is not present.
[0040]
The wire 22 is the same steel wire as in the first embodiment, and is configured such that both ends are fixed to the side surfaces of the pressure receiving frame 21 facing each other and stretched between the pressure receiving frames 21. However, a plurality of wires 22 that are stretched between the pressure receiving frames 21 intersect each other on the ground surface between the pressure receiving frames 21 in accordance with the change in the arrangement pattern of the pressure receiving frames 21.
[0041]
The pressing frame 23 forms a substantially pantograph-like link mechanism by combining a plurality of link members, and is formed as a substantially trapezoidal body having a storage portion for the filling bag 24 on the ground surface side. The plurality of wires 22 are arranged between the wires 22 and the surface of the ground 50 at the intersections, and the ground vertical dimension can be changed by adjusting the relative positional relationship of the link members. A plurality of wire holding portions 23 a for engaging the wires 22 are formed on the upper portion of the pressing frame 23, and the pressing frame 23 can be restrained so as not to come off between the wires 22 and the ground surface 50. Further, the pressure detecting means for detecting the pressure state between the pressing frame 23 and the wire 22 is disposed at the contact position of the wire holding portion 23 a with each wire 22.
[0042]
As in the first embodiment, the filling bag 24 is formed of a hollow bag-like body filled with a predetermined filler, and is disposed between the pressing frame 23 and the surface of the ground 50 and filled inside. The material is filled with a predetermined amount, expands to a predetermined expansion state, and finally hardens to maintain the expansion state. By adjusting the filling amount of the filling bag 24, the distance between the pressing frame 23 and the ground 50 surface when the pressing frame 23 is installed on the ground 50 can be set as appropriate.
[0043]
The dimension adjusting means 25 is disposed between predetermined link members of the pressing frame 23, receives information on the pressure state between the pressing frame 23 and the wire 22 output from the pressure detecting means, and receives the pressure state. The relative positional relationship between the link members forming the pressing frame 23 is changed in accordance with the change in the vertical direction, and the ground vertical direction dimension of the pressing frame 23 is automatically adjusted.
[0044]
Next, installation of the ground holding structure based on the above configuration and a load transmission state after installation will be described. First, the pressure receiving frame 21, the wire 22, the pressing frame 23, and the filling bag 24 are individually carried into the site. Then, the filling bag 24 is stored in advance in the storage space of the pressing frame 23 and integrated with the pressing frame 23. Thereafter, the pressure receiving frame 21 is placed on the anchor tension member 10 placement site, with the ground exposed portion of the anchor tension member 10 passing through the center hole of the pressure receiving frame 21.
[0045]
The pressing frame 23 is placed at a predetermined position on the ground surface where the wires 22 between the pressure receiving frames 21 intersect, and the wires 22 are engaged with the wire holding portions 23a on the pressing frame 23, respectively. In this state, both ends of the wire 22 are fixed to each side surface of the pressure receiving frame 21.
Thereafter, after filling the pressure receiving frame 21 with a predetermined filling material, the pressure receiving frame 21 is fixed to the anchor tension member 10 to fix the pressure receiving frame 21 to the ground 50.
[0046]
Further, after the inside of the pressure receiving frame 21 is cured, the filling bag 24 is filled with a predetermined filling material and inflated, and the inflated state is adjusted in accordance with the non-landing state of the ground. In addition, the gap between the pressing frame 23 and the ground 50 is adjusted to increase the tension in the wire 22, and the ground surface side direction component of the tension of the wire 22 is pressed from the pressing frame 23 and the filling bag 24. If it can be transmitted to the ground 50, the installation on the ground 50 is completed.
[0047]
Next, the load transmission state in the ground holding structure according to this embodiment will be described. In the pressure receiving frame 21 that is fixed to the anchor tension member 10 in a fixed state on the surface of the ground 50, the tension force of the anchor tension member 10 is transmitted as a force toward the ground surface side via the upper surface of the pressure receiving frame 21, Finally, a pressing force is applied from the lower surface of the pressure receiving frame 21 to the ground 50 so that the ground 50 can be held.
[0048]
Further, among the tension force generated in the wire 22, the ground surface side direction component is transmitted to the pressing frame 23 disposed near the ground of the wire 22 as a force directed toward the ground surface side. Thus, the force transmitted to the ground surface side transmitted to the pressing frame 23 is transmitted to the inflated filling bag 24 and further applied as a pressing force from the lower surface of the filling bag 24 to the surface of the ground 50 to hold the ground 50.
[0049]
When the tension generated in the wire 22 changes due to a change in the ground (see FIG. 6A), the pressure change between the wire 22 and the pressing frame 23 is detected by the pressure detection means ( (Not shown) is detected, and pressure change information is output to the dimension adjusting means 25. The dimension adjusting means 25 changes the relative positional relationship of each link member of the pressing frame 23 according to the pressure change, automatically adjusts the vertical dimension of the ground of the pressing frame 23, and sets the tension of the wire 22 in advance. Therefore, the change in the ground 50 can be reliably handled.
[0050]
Thus, in the ground holding structure according to the present embodiment, the pressing frame 23 is formed so that the vertical dimension of the ground can be adjusted by a combination of a plurality of link members, and the pressing frame 23 and the wire 22 Pressure detecting means for detecting the pressure state between the pressure detecting means and a dimension adjusting means 25 for changing the relative positional relationship between the link members of the pressing frame 23 based on the detection result of the pressure detecting means. The dimension adjusting means 25 changes the relative positional relationship of each link member of the pressing frame 23 in accordance with the pressure change between the pressing frame 23 and the wire 22 and adjusts the vertical dimension of the pressing frame 23 in the ground direction. Since the tension state of the wire 22 is changed and the tension of the wire 22 is changed by changing the state of the ground 50 at the position where the pressing frame 23 is disposed. Accordingly, the ground vertical dimension of the pressing frame 23 is automatically adjusted so that the tension state of the wire 22 can be maintained within a predetermined range, and the ground 50 is applied to the ground 50 based on the tension of the wire 22 corresponding to the change of the ground 50. The pressing force can always be adjusted to an optimal state without human intervention, and the ground 50 can be safely held over a long period of time without requiring maintenance. In addition, since the pressing frame 23 is disposed at a position where the plurality of wires 22 intersect, and each of the filling bags 24 is inflated to tension the plurality of wires 22 together, the plurality of wires 22 are attached to the pressing frame 23. Thus, a large force toward the ground 50 side based on the tension force is generated, and a strong pressing force is applied to the ground 50 from the pressing frame 23 via the filling bag 24, so that the ground 50 can be reliably pressed and held.
[0051]
In the ground holding structure according to the second embodiment, the information regarding the pressure state between the pressing frame 23 and the wire 22 obtained by the pressure detection unit is directly output to the dimension adjustment unit 25, and the dimension adjustment is performed. The relative positional relationship of each link member of the pressing frame 23 is changed based on the information obtained by the means. However, the present invention is not limited to this, and the pressure detecting means is provided between the pressing frame 23 and the wire 22. The pressure state is detected and transmitted to the external management means, and the dimension adjustment means 25 changes the relative positional relationship of the link members of the pressing frame 23 based on the remote operation from the management means, and the pressing frame 23. It is also possible to adjust the vertical direction dimension of the ground of the pressing frame even if the tension of the tension material changes due to the change in the state of the ground, as in the second embodiment. Directional dimensions are automatically adjusted to maintain the tension state of the tendon within the specified range, and the pressing force to the ground based on the tension can be adjusted to the optimum state without human intervention at all times. It is possible to keep the ground safely for a long time.
[0052]
Moreover, in the ground holding structure according to each of the first and second embodiments, the planar shape of the pressure receiving frames 11 and 21 is a hexagonal shape. It is also possible to use a member having a shape such as a polygonal shape or a circular shape such as a circular shape or a curved surface portion that is continuous on a predetermined length so that the ends of the wires 12 and 22 can be fixed. An appropriate shape can be selected according to the arrangement pattern. Further, the arrangement of the wires 12 and 22 is not limited to the above configuration, and the ends of the wires 12 and 22 are fixed only to one or a plurality of side surfaces of the pressure receiving frames 11 and 21 and the wires 22 are not fixed to all side surfaces. You can also.
[0053]
Moreover, in the ground holding structure according to each of the first and second embodiments, the pressure receiving frames 11 and 21 and the pressing frame 13 are all made of a steel plate. These metal materials can be used, or they can be made of lightweight and high strength FRP, or ceramic, glass, or concrete. Each of the wires 12 and 22 is configured to be a steel wire, but is not limited thereto, and may be a single wire or a stranded wire such as a carbon fiber or an aramid fiber that is lightweight and has high tensile strength. Furthermore, although the filling bags 14 and 24 which expand | swell by being filled with a filler as an expansion | swelling body are used, it is not restricted to this, The material which expand | swells to predetermined magnitude | size when water, a chemical | medical agent, etc. act Etc. can also be used.
[0054]
Further, in the ground holding structure according to each of the first and second embodiments, the pressure receiving frames 11 and 21 are light enough to be carried by hand, and are hardened with a filler inside. However, the present invention is not limited to this, and the pressure receiving frames 11 and 21 can be configured to have a high strength from the beginning. After the pressure receiving frames 11 and 21 are installed, It can be integrated with the anchor pulling member 10 by omitting the period of curing (curing) by filling the filler, and subsequently the filling bags 14 and 24 at the positions of the pressure frames 13 and 23 between the pressure receiving frames 11 and 21. The filling and curing operations for the filler can be performed immediately, and the construction period can be shortened.
[0055]
In the ground holding structure according to each of the first and second embodiments, independent wires 12 and 22 are disposed between the pressure receiving frames 11 and 21, and both ends are fixed to the pressure receiving frames 11 and 21. However, it is also possible to adopt a configuration in which one wire 12, 22 passes through the pressure receiving frames 11, 21 and extends between two or more pressure receiving frames 11, 21.
[0056]
【The invention's effect】
As described above, according to the present invention, a tension material is stretched between a plurality of pressure receiving frames arranged at predetermined intervals on the ground surface, and a pressing frame and an expansion body are combined and disposed at an intermediate position of the tension material. The tension material between the pressure receiving frames is tensioned by the expansion of the expansion body, and by applying a pressing force to the ground via the pressing frame and the expansion body below the tension material, It is possible to hold the ground even at the position of each pressing frame between the pressure receiving frames. Even if a small pressure receiving frame is used, the ground can be held securely and the ground can be securely held. It can be applied even in situations where it was difficult to perform conventional construction, and can be applied to various construction locations. In addition, it can be held by applying pressure to the recessed part of the ground with a pressing frame. To sex Excellent, there is an effect that pre-stress can be actively introduced in order to suppress the collapse of the ground not only retain the ground. In addition, even if the tension of the anchor tension member is suppressed to weaken the strength of the pressure receiving frame and the ground holding force, or even if the number of anchor tension members and pressure receiving frames is reduced, the pressure receiving frame, the tension material, and the pressing By combining the frames, it is possible to maintain sufficient ground, and it is possible to maintain the ground with excellent economic efficiency.
[0057]
Further, according to the present invention, the filling bag is disposed as an inflating body between the ground surface and the pressing frame, and the tensioning material between the pressure receiving frames is tensioned by filling the filling bag with the filling material. By applying a pressing force to the ground via the filling bag, it is possible to easily adjust the tension of the tension material by adjusting the filling amount to the filling bag, that is, the pressing force at the position of the pressing frame. The ground holding state at each position between the frames can be optimized, and the flexible filling bag filled with the filler closely adheres to the ground surface to respond finely to the unevenness of the ground, so that the pressing force is appropriately adjusted to the ground It is transmitted and has the effect that the ground can be securely held. In addition, the filling operation of the filling material into the filling bag is relatively easy, and the efficiency of the entire operation can be improved and the cost can be reduced.
[0058]
Further, according to the present invention, a substantially box-like body is disposed between the tension material and the ground surface as a pressing frame, and the tension force of the tension material is applied to the ground surface via the expansion body stored in the internal storage space. By transmitting as a pressing force, the ground can be effectively pressed with a simple structure, and it is easy to carry in, and the cost can be reduced.
Further, according to the present invention, the pressing frame is formed such that the vertical dimension of the ground can be adjusted by a combination of a plurality of link members, and the ground of the pressing frame is disposed between the tension material and the ground surface. By adjusting the vertical dimension and changing the tension state of the tendon material, the pressing force to the ground based on the tension force of the tendon material can be adjusted, and the pressing state of the ground can be adjusted together with the expansion state adjustment of the expansion body. It has the effect that it can be adjusted to an optimal state.
[0059]
Further, according to the present invention, the pressure detecting means for detecting the pressure state between the pressing frame and the tendon is provided, and the link members of the pressing frame are detected based on the detection result of the pressure detecting means. A dimension adjusting means for changing the relative positional relationship is provided, and the dimension adjusting means changes the relative positional relationship of each link member of the pressing frame in accordance with a pressure change between the pressing frame and the tension member, By adjusting the ground vertical dimension, if the ground state at the pressing frame placement position changes and the tension of the tendon changes, the ground vertical dimension of the pressing frame is automatically adjusted accordingly. The tension state of the tension material can be maintained within the specified range, and the pressing force to the ground based on the tension force can be adjusted to the optimum state without manual intervention in response to changes in the ground. An effect that can safely hold the soil over a long term Inability.
[0060]
Further, according to the present invention, the pressure detection means for detecting the pressure state between the pressing frame and the tendon and transmitting it to the external management means is provided, and based on the remote operation from the management means. A dimension adjusting means for changing the relative positional relationship between the link members of the pressing frame is provided, and the dimension adjusting means is arranged to change the relative positional relationship between the link members of the pressing frame according to a pressure change between the pressing frame and the tension member. By changing the vertical direction dimension of the ground for the pressing frame, the ground state at the position where the pressing frame is disposed changes, and the tension of the tension material changes accordingly. The vertical dimension is automatically adjusted so that the tension of the tension material can be maintained within the specified range, and the pressing force to the ground based on the tension force is always kept in an optimal state in response to changes in the ground without human intervention. It can be adjusted, an effect that can safely hold the soil for a long time without the hassle of maintenance.
[0061]
Further, according to the present invention, the pressing frame is disposed at a position where the plurality of tension members intersect, and the plurality of tension members are inflated by tensioning each of the inflating bodies, whereby the plurality of tension members are collectively tensioned. A large force to the ground side based on the tension force of the tension material is generated, and a strong pressing force is applied to the ground from the pressing frame via the expansion body, and the ground can be reliably pressed and held.
[0062]
Further, according to the present invention, the pressure receiving frame has a substantially box-like body, and after the installation on the ground surface, the pressure receiving frame is filled with the filler, thereby increasing the weight and strength of the pressure receiving frame, thereby the end of the tension material It is possible to increase the strength of the pressure receiving frame for fixing the belt and generate a large tension force by the tension material, and to further increase the pressing force to the ground and to improve the reliability of the ground holding.
[Brief description of the drawings]
FIG. 1 is a plan view and a main part side view of a ground holding structure according to a first embodiment of the present invention.
FIG. 2 is a perspective view of a pressure receiving frame and a pressing frame in the ground holding structure according to the first embodiment of the present invention.
FIG. 3 is an explanatory diagram of a state before wire tension and a wire tension state in the ground holding structure according to the first embodiment of the present invention.
FIG. 4 is a plan view of a ground holding structure according to a second embodiment of the present invention.
FIGS. 5A and 5B are a plan view and a side view of a pressing frame in a ground holding structure according to a second embodiment of the present invention. FIGS.
FIG. 6 is an explanatory diagram of a wire relaxed state and a wire re-tensioned state due to ground change in the ground holding structure according to the second embodiment of the present invention.
FIG. 7 is a plan view of a conventional pressure receiving frame.
FIG. 8 is a cross-sectional view of a conventional pressure receiving frame.
[Explanation of symbols]
10 Anchor tension member
11, 21 Pressure receiving frame
11a, 101a Center hole
12, 22 wires
13, 23 Pressing frame
13a Wire holding groove
14, 24 Filling bag
23a Wire holding part
25 Dimensional adjustment means
50 ground
101 Core part
102 Arm
103 Bottom plate

Claims

At least a pressure receiving frame installed on the ground surface in a state of being integrally fixed to the ground exposed portion of the other end side of the anchor tension member whose one end is fixed in the ground, and presses the ground surface with the pressure receiving frame In the ground holding structure to hold the ground,
A plurality of the pressure receiving frames are arranged at predetermined intervals on the ground in a state where the pressure receiving frames are integrated with the anchor tension member,
One or a plurality of substantially linear tension members stretched between the pressure receiving frames facing each other with the end portions fixed to the pressure receiving frames;
One or more are arranged on the ground surface between the pressure receiving frames in a state in which the movement in the direction away from the ground surface at least by the tendon is in contact with the tendon, and is directed to the ground surface side. a pressing frame made therein and one end face opens the substantially box-shaped body having a predetermined receiving space possess the ground surface,
A predetermined expansion body that is accommodated in the storage space of the pressing frame and disposed between the pressing frame and the ground surface, and is capable of expanding to a predetermined volume;
The inflatable body is formed of a substantially bag-like filling bag having flexibility,
The filling bag disposed between the pressing frame and the ground surface is filled with a predetermined filler to a predetermined inflated state in accordance with the non-landing state of the ground, and the filling bag is placed on the ground surface. While making the ground contact and curing , the pressing frame is moved together with the tendon material by a predetermined distance in a direction away from the ground surface to tension the tendon material, and the tendon material generates a ground surface side direction component of the tension force. A characteristic ground holding structure.

In the ground holding structure according to claim 1,
The pressing frame has a link mechanism in which a plurality of link members are combined on the upper side of the substantially box-shaped body, and the vertical direction dimension of the ground can be adjusted by adjusting the relative positional relationship of each link member in the arrangement state on the ground surface. The ground retaining structure is characterized in that the tension of the tension material is adjusted by changing the vertical dimension of the ground.

In the ground holding structure according to claim 2 ,
A predetermined pressure detecting means disposed at one or a plurality of predetermined positions between the pressing frame and the tension material, and detecting a pressure state between the pressing frame and the tension material at the predetermined position;
The relative positional relationship between the link members constituting the pressing frame is changed according to the pressure state between the pressing frame and the tension member, which is disposed between the predetermined link members of the pressing frame and detected by the pressure detecting means. And a predetermined dimension adjusting means .

In the ground holding structure according to claim 2 ,
It is disposed at one or a plurality of predetermined locations between the pressing frame and the tendon material, detects the pressure state between the pressing frame and the tendon material at the predetermined location, and acquires the acquired information as external management means Predetermined pressure sensing means for transmitting to
A predetermined dimensional adjusting unit disposed between the predetermined link members of the pressing frame and configured to change a relative positional relationship between the link members forming the pressing frame based on a remote operation from the management unit. A characteristic ground holding structure.

In the ground holding structure according to any one of claims 1 to 4 ,
An arrangement position of the pressing frame is a point where a plurality of tendons stretched between the pressure receiving frames intersect each other .

In the ground holding structure according to any one of claims 1 to 5 ,
The ground is characterized in that the pressure receiving frame is formed of a substantially box-shaped body having a predetermined polygonal planar shape, is filled with a predetermined filler inside after being installed on the ground surface, and the filler is cured. Retaining structure.