JP4378048B2 - Pressure receiving frame for ground anchor - Google Patents

Pressure receiving frame for ground anchor Download PDF

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JP4378048B2
JP4378048B2 JP2000385915A JP2000385915A JP4378048B2 JP 4378048 B2 JP4378048 B2 JP 4378048B2 JP 2000385915 A JP2000385915 A JP 2000385915A JP 2000385915 A JP2000385915 A JP 2000385915A JP 4378048 B2 JP4378048 B2 JP 4378048B2
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直哉 小田
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株式会社アルファービジョン
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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工法に用いられるグラウンドアンカー用受圧フレームに関する。
【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、所定形状の型枠を使用して設置現場でコンクリートを打設してアンカー台座を製作し利用する工法が用いられるようになっている。その一例として、特許登録第２６９９００９号公報に記載されるものがあり、これを図５に示す。図５は従来のグラウンドアンカー台座施工法に基づくアンカー台座の一部切欠斜視図である。
【０００５】
前記図５に示す従来のグラウンドアンカー台座施工法は、アンカー引張部材１０の地表露出部となっている地盤５０上に、地盤５０側を可撓性・透水性を有するシート材とした型枠１１０を設置し、型枠１１０内にセメントミルク等の硬化材１１２を圧入し、これを硬化させてアンカー台座１００を形成し、この完成したアンカー台座１００にアンカー引張部材１０を固定するものである。
【０００６】
前記型枠１１０は、略十字状の平面形状を有し、且つ地盤５０側が開放した略箱状体で形成され、硬化材１１２が充填される袋体１１１を前記シート材として組合わせて配設される構成である。この型枠１１０設置後、型枠１１０内部の袋体１１１内にセメントミルク等の硬化材１１２を充填して硬化させることで、所定の強度を有するアンカー台座１００となる。
【０００７】
この従来のグラウンドアンカー台座施工法では、アンカー施工現場でアンカー台座１００を構築でき、施工箇所の制限が解消される。また、型枠１１０の地盤５０側に位置する袋体１１１が地盤５０表面の不陸に対応して接地形状を変化させるため、地盤５０に対する押圧力の偏在が生じず、安定した地盤保持が行える。
【０００８】
また近年、別の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も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６に示す。図６は従来のグラウンドアンカー用受圧フレームの平面図及び横断面図である。
前記図６に示す従来の受圧フレーム２００は、貫通状態の中心孔２０１ａを有する略箱状体のコア部２０１と、このコア部２０１同様中空の略箱状体で形成され、コア部２０１に対し十字状に配置されてコア部２０１と一体に固定される四つのアーム部２０２と、コア部２０１及びアーム部２０２の地盤表面寄り側に一体に固着される略方形状の底板２０３とを備える構成である。
【０００９】
前記した構成の受圧フレーム２００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。
【００１０】
【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台座及び受圧フレームは以上のように構成されており、従来前者の場合、型枠１１０を硬化材硬化後そのまま残す場合においても、型枠１１０は強度部材としては働かないため、アンカー台座１００に加わる力は全て硬化材と鋼線等の補強材で負担することとなり、所定の強度を確保するにはアンカー台座１００に一定以上の大きさが必要となって、このアンカー台座１００をなす硬化材が大量に必要となると共に、養生（硬化）に時間がかかるという課題を有していた。
【００１１】
また、アンカー台座１００自体は現場で形成され、運搬及び設置の必要はないものの、型枠１１０が現場以外で製造された場合、型枠１１０は比較的大型の一体成形物であるため、人手による運搬及び設置は行えず、運搬用の作業機械が必要となる。このため、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型枠１１０を設置してアンカー台座１００を成型するのが著しく困難であるという課題を有していた。この他、型枠１１０をコンクリート等で施工現場にて製造する場合もあるが、型枠製造のためにさらに型枠が必要となるなど、コスト高になることに加え、型枠の分の養生期間が加わることとなり、工事期間が一層長期化してしまうという課題を有していた。
【００１２】
一方、従来後者の場合、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２００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。
【００１３】
さらに、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、アンカー台座及び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、従来のアンカー台座及び受圧フレームでは、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。
【００１４】
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の接地面積を確保し、確実な地盤の保持を可能とした上で、軽量化が図れ且つ分割状態からの組立が容易な簡略構造として、現場への搬入を容易にして設置条件の緩和と共にアンカー工事全体での手間とコストの低減が図れるグラウンドアンカー用受圧フレームを提供することを目的とする。
【００１５】
【課題を解決するための手段】
本発明に係るグラウンドアンカー用受圧フレームは、貫通状態の中心孔を有するコア部と、前記コア部周囲に配置される複数の押圧部とを少なくとも備え、地盤中に一端部が固定され且つ他端部が地上に延出しているアンカー引張部材で地盤表面に支持されるグラウンドアンカー用受圧フレームにおいて、前記押圧部が、中心部に地面直角方向へ貫通する開放部分を有する略枠状体で形成され、前記押圧部の対向する内側面に所定の拘束用部材端部をそれぞれ固定して内側面間に拘束用部材を一体に架設し、当該拘束用部材上側に前記開放部分を残し、前記コア部が、周側面に前記押圧部側部を取付可能な部分を複数有する略箱状体で形成されてなり、前記押圧部の開放部分における前記拘束用部材より地盤表面寄りの位置に配設され、必要に応じて所定の膨張限界又は周囲の拘束用部材及び地盤表面に達するまで膨張すると共に、膨張後の形状を維持する所定の膨張体を備え、
前記押圧部を周囲に一体に取付けられたコア部が、前記アンカー引張部材の地上部分と一体化されるものである。
【００１６】
このように本発明においては、略箱状体のコア部に対し複数の略枠状の押圧部を取付けて一体化し、各押圧部中心の開放部分に収納している所定の膨張体を膨張させて地盤表面に密着させ、この状態でアンカー引張部材とコア部を固定して地盤を保持させることにより、軽量で簡略な構造ながら適度な設置面積を有する押圧部で地盤の保持面積を十分確保し、且つ膨張した膨張体が地盤表面の不陸部分にも密着して押圧力を与えられ、確実に地盤を保持できると共に、コア部と押圧部とを組立てて一体化する場所をアンカー工事の現場など任意に選んで組立てることができ、コア部と各押圧部とを分割状態で搬入でき、各部材を人手でも搬入可能となって従来施工が難しかった状況でも施工可能となり、様々な箇所に適用できる。また、アンカー引張部材の緊張力をコア部及び押圧部で受け、膨張体には地面直角方向への押圧力以外は加わらないことから、不陸に対応可能である状態を確保しつつ、膨張体をフレーム強度と関わりなく必要最小限の量のみ配設でき、軽量化とコストダウンが図れる。さらに、押圧部の残りの開放部分に所定の充填材を入れて重量を増加させ、押圧力を一層高めることができ、特に充填材として土を入れた場合にはこの土部分に植物を植えて施工箇所の緑化も図れる。
【００１７】
また、本発明に係るグラウンドアンカー用受圧フレームは、貫通状態の中心孔を有するコア部と、前記コア部周囲に配置される複数の押圧部とを少なくとも備え、地盤中に一端部が固定され且つ他端部が地上に延出しているアンカー引張部材で地盤表面に支持されるグラウンドアンカー用受圧フレームにおいて、前記押圧部が、中心部に地面直角方向へ貫通する開放部分を有する略枠状体で形成され、 前記押圧部の対向する内側面に所定の拘束用部材端部をそれぞれ固定して内側面間に拘束用部材を一体に架設し、当該拘束用部材上側に前記開放部分を残し、前記コア部が、前記各押圧部を側面同士で略環状に連結して生じる中央の略筒状部分からなり、前記押圧部の開放部分における前記拘束用部材より地盤表面寄りの位置に配設され、必要に応じて所定の膨張限界又は周囲の拘束用部材及び地盤表面に達するまで膨張すると共に、膨張後の形状を維持する所定の膨張体を備え、 前記押圧部を一体に連結して組立てられてなるコア部が、前記アンカー引張部材の地上露出部分と一体化されるものである。
【００１８】
このように本発明においては、複数の略枠状の押圧部同士を略環状に連結して中央の略筒状部分をコア部となし、各押圧部の開放部分に収納している所定の膨張体を膨張させて地盤表面に密着させ、この状態でアンカー引張部材とコア部を固定して地盤を保持させることにより、軽量で簡略な構造ながら適度な設置面積を有する押圧部で地盤の保持面積を十分確保し、且つ膨張した膨張体が地盤表面の不陸部分にも密着して押圧力を与えられ、確実に地盤を保持できると共に、押圧部を組立てて一体化する場所をアンカー工事の現場など任意に選んで組立てることができ、各押圧部を個別に搬入でき、各部材を人手でも搬入可能となって従来施工が難しかった状況でも施工可能となり、様々な箇所に適用できる。また、アンカー引張部材の緊張力を押圧部で受け、膨張体には地面直角方向への押圧力以外は加わらないことから、不陸に対応可能である状態を確保しつつ、膨張体をフレーム強度と関わりなく必要最小限の量のみ配設でき、軽量化とコストダウンが図れる。さらに、コア部として押圧部の一部を使用することで別部材を用いる必要がなく、部品点数を減らして搬入性の向上と施工の低コスト化が図れる。
【００１９】
また、本発明に係るグラウンドアンカー用受圧フレームは必要に応じて、前記押圧部が、同じ前記コア部周囲に配置される他の押圧部と隣接する位置の側面に、前記隣接する他の押圧部を一体に連結可能とされてなるものである。
このように本発明においては、コア部周囲に配置される押圧部を隣接する他の押圧部に固定可能とし、コア部周囲の各押圧部同士を連結して一体化することにより、押圧部を人手で搬入可能な重量を実現する強度としても、隣接する押圧部同士の連結で強度を著しく向上させられると共に、押圧部で負担可能な地盤の押圧力を増加させられ、確実に地盤を押圧できる。
【００２０】
また、本発明に係るグラウンドアンカー用受圧フレームは必要に応じて、前記押圧部の外周側に、同じコア部に隣接しない別の押圧部を追加して配設して一体に連結するものである。
このように本発明においては、押圧部の外側面に別の押圧部の外側面を取付可能として、押圧部同士を連結可能とすることにより、押圧部を人手で搬入可能な重量を実現する強度としても、押圧部の外側に別の押圧部を取付け、押圧部同士を連結することで強度を向上させられると共に、押圧面積も効果的に増加させられ、確実に地盤を押圧できる。
【００２１】
また、本発明に係るグラウンドアンカー用受圧フレームは必要に応じて、前記膨張体が、可撓性を有する略袋状体の充填用袋で形成され、前記押圧部の拘束用部材と地盤表面との間に配設された状態の前記充填用袋内に所定の硬化材を所定量充填して充填用袋を膨張させ、充填後に硬化材を硬化させるものである。
このように本発明においては、膨張体として充填用袋が地盤表面と押圧部の拘束用部材間に配設され、硬化材の充填で柔軟な充填用袋を膨張させて地盤の不陸にも細かく対応させて地盤表面に密着させ、膨張後硬化材の硬化で形状を維持する充填用袋を介してアンカー引張部材の緊張力を地盤に押圧力として与えられることにより、地盤の不陸の有無に拘らず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共に、充填用袋への硬化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。
【００２２】
【発明の実施の形態】
以下、本発明の一実施の形態を図１及び図２に基づいて説明する。図１は本実施形態に係るグラウンドアンカー用受圧フレームの斜視図及び地盤保持状態断面図、図２は本実施形態に係るグラウンドアンカー用受圧フレームの組立工程説明図である。
【００２３】
前記各図において本実施形態に係る受圧フレーム１は、貫通状態の中心孔２ａを有する鋼板製中空略箱状体のコア部２と、このコア部２の各側面に固定されてコア部２を中心に対称配置される略枠状の四つの押圧部３と、各押圧部３の地盤表面寄り側に一体に配設される膨張体としての充填用袋４とを備える構成である。
【００２４】
前記コア部２は、平面形状が方形となる中空の略箱状体で形成され、各側面を前記押圧部３側部の取付部分とされると共に、上下面に貫通孔をそれぞれ形成され、この上下の貫通孔及び略箱状体内部をアンカー引張部材１０の地上露出部分が通る中心孔２ａとされる構成である。なお、コア部２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。このコア部２内には設置後必要に応じて所定の充填材を充填することもできる。
【００２５】
前記押圧部３は、中心部に地盤５０垂直方向へ貫通する開放部分を有し、且つ平面形状が八角形となる鋼板製枠状体で形成され、前記開放部分に面する内側面間に拘束用部材３ａを一体に架設されてなる構成である。前記拘束用部材３ａは、所定の強度を有する略板状体であり、端縁部を押圧部３の内側面にそれぞれ固定される。なお、この拘束用部材３ａには多数の孔（図示を省略）が形成されており、拘束用部材３ａに透水性及び通気性を与えている。
【００２６】
前記充填用袋４は、グラウト等の硬化材を充填される丈夫な可撓性素材製の中空袋状体で形成され、押圧部３の開放部分における拘束用部材３ａと地盤５０表面との間に収納配設され、内部に硬化材を所定量充填されて所定の膨張状態まで膨張し、最終的に硬化材の硬化で膨張状態を維持する構成である。この充填用袋４が膨張すると、押圧部３の拘束用部材３ａと接触して各拘束用部材３ａに地盤５０表面から離れる方向への動きを拘束されつつ、逆の地盤５０表面側に向かって膨張して地盤５０表面に密着する仕組みである。
【００２７】
次に、前記構成に基づく受圧フレームの構築動作及び定着後の荷重伝達状態について説明する。まず、アンカー引張部材１０が一端部を地盤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施工現場に対し、コア部２、押圧部３、及び充填用袋４をそれぞれ個別に搬入する。そして、あらかじめ充填用袋４を押圧部３の開放部分における拘束用部材３ａ下側に収納し、押圧部３と一体化しておく。この後、コア部２を、アンカー引張部材１０の地上露出部分がコア部２の中心孔２ａに通る状態としつつ、地盤５０のアンカー引張部材１０打設箇所にそれぞれ載置する。
【００２８】
また、押圧部３をその開放部分の充填用袋４が地盤５０表面寄りとなる向きでコア部２に隣接する位置に載置し、押圧部３側部をコア部２各側面にボルト止めや溶接等で一体に固定し（図２参照）、さらに隣接する押圧部３同士もボルト止めや溶接等で一体に固定して、アンカー引張部材１０打設箇所で受圧フレーム１としての組立完成状態とする。この際、必要に応じて所定の充填材をコア部２内部に充填し、充填材を硬化させてコア部２の重量及び強度を増加させることもできる。
【００２９】
この後、外部から充填用袋４に所定の硬化材を充填して膨張させ、押圧部３の拘束用部材３ａと地盤５０との間隙を埋め、膨張状態のまま硬化材を硬化させる。この硬化材の硬化後、コア部２をアンカー引張部材１０の地上露出部分と定着させると、受圧フレーム１全体を地盤５０に固定した状態となり、地盤５０への設置完了となる（図１（Ｂ）参照）。
【００３０】
さらに、必要に応じて、押圧部３の開放している拘束用部材３ａ上側の領域に土等を入れ、さらにこの土部分に植物を植えて施工箇所の緑化を図ることもでき、重量の増加により押圧力も一層高められる。
続いて、この本実施の形態に係る受圧フレーム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コア部２において、アンカー引張部材１０の緊張力が、コア部２上面を経て側面部に地盤５０表面側に向う圧縮応力として伝達される。
【００３１】
コア部２の側面部に伝達された圧縮応力は、側面部の外側に固定されている押圧部３に地盤５０表面側に向う力として伝わる。こうして各押圧部３に伝わった地盤表面側に向う力が、最終的に押圧部３内側の拘束用部材３ａを介して、硬化した充填用袋４に伝わり、充填用袋４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。
【００３２】
このように、本実施の形態に係る受圧フレームにおいては、アンカー引張部材１０に定着されるコア部２の周囲に枠状の押圧部３を配設し、この押圧部３の中心位置に充填用袋４を配設して、充填材の充填による膨張で充填用袋４を地盤５０表面に密着させ、アンカー引張部材１０からの力を充填用袋４を介して地盤５０に押圧力として与えることから、各押圧部３及び充填用袋４で地盤５０の保持面積を十分確保し、且つ、可撓性材料製の充填用袋４が地盤５０表面に密着して地盤５０の不陸部分にも適切に押圧力を伝えられ、確実に地盤５０を保持できる。また、必要な各部材を分割状態でアンカー工事の現場に搬入でき、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。
【００３３】
なお、前記実施の形態に係る受圧フレームにおいては、コア部２の周囲に押圧部３を取付けて一組の受圧フレーム１とする構成としているが、これに限らず、図３に示すように、押圧部３の外周側に同じコア部２に隣接しない別の押圧部３０を追加して配設して一体に連結する構成とすることもでき、地盤５０の押圧面積を受圧フレーム１外側に拡張できると共に、押圧部同士を連結することで強度も向上させられ、確実に地盤５０を押圧保持できる。
【００３４】
また、前記実施の形態に係る受圧フレームにおいて、コア部２は中空の略箱状体で形成され、各側面に押圧部３側部を取付けられて一組の受圧フレーム１とされる構成としているが、これに限らず、複数の押圧部３が側面同士で略環状に連結されて生じる中央の略筒状部分をコア部２となし、コア部として押圧部３に荷重を伝達する略箱状体等の別部材を用いない構成とすることもでき、特に、図４に示すように、押圧部３として溶接用の開先となる隙間を設けた略枠状体を用い、各押圧部３同士を各隙間位置での溶接で互いに連結する構成とする場合、確実に地盤５０を押圧保持できる状態はそのままに、連結のための溶接箇所を必要最小限に留めることができ、コア部となる別部材を省略できることと合わせて、組立能率を向上させられると共にさらなるコストダウンが図れる。さらに、押圧部３各側面にボルトを通す貫通孔３ｂをあらかじめ形成しておき、必要に応じて隣接する押圧部３同士をボルト止めで固定することもでき、押圧部３同士の連結強度をより一層向上させて地盤５０の保持力を高められる。
【００３５】
また、前記実施の形態に係る受圧フレームにおいては、押圧部３を八角形平面形状の枠状体とする構成としているが、これに限らず、押圧部３として四角や三角形等の多角形、また円形の平面形状など、板状体が連続して枠形状をなし、コア部２及び／又は他の押圧部３と密着可能となる略枠状体を用いる構成とすることもでき、前記同様に簡略な構造で地面直角方向に高い強度を実現可能となる。さらに、押圧部３をなす略枠状部分の高さ方向寸法についても、一つの押圧部３で全て一致させる構成に限らず、地面の傾斜等に対応させて押圧部３の略枠状部分の各位置で高さ方向寸法を異ならせる構成としてもかまわない。
【００３６】
また、前記実施の形態に係る受圧フレームにおいては、コア部２の平面形状を矩形状とし、このコア部２に四つの押圧部３を固定する構成としているが、これに限らず、コア部２を平面形状が四角形以外の多角形や円形となる略箱状体とし、且つコア部２の側面に対応する所定数の押圧部３をコア部２を中心とする対称配置でそれぞれコア部２に固定する構成とすることもできる。
【００３７】
また、前記実施の形態に係る受圧フレームにおいては、コア部２や押圧部３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、軽量で強度の高いＦＲＰ製や軽量コンクリート製とすることもできる。加えて、充填用袋４が可撓性を有する素材で形成される構成としているが、この他、充填用袋４が可撓性と共に透水性を有する素材で形成され、内部に充填される硬化材のうち液分が外部に所定の割合でしみ出す構成とすることもでき、硬化材の液分が地盤５０に浸透して硬化し、充填用袋４と地盤５０との密着をより強力にすることとなり、確実に地盤５０を保持できる。
【００３８】
さらに、前記実施の形態に係る受圧フレームにおいては、押圧部３内側の拘束用部材３ａを略板状体とする構成としているが、これに限らず、拘束用部材３ａとして、鋼線や、軽く引張強度の高い炭素繊維、アラミド繊維等からなる線状体を用い、これら線状体両端部を対向する押圧部３の内側面にそれぞれ固定して押圧部３内に所定の緊張状態で複数本架設する構成とすることもできる。また、線状体の他にも、軽量で丈夫なシート体や棒状体を用いてもよい。
【００３９】
【発明の効果】
以上のように本発明によれば、略箱状体のコア部に対し複数の略枠状の押圧部を取付けて一体化し、各押圧部中心の開放部分に収納している所定の膨張体を膨張させて地盤表面に密着させ、この状態でアンカー引張部材とコア部を固定して地盤を保持させることにより、軽量で簡略な構造ながら適度な設置面積を有する押圧部で地盤の保持面積を十分確保し、且つ膨張した膨張体が地盤表面の不陸部分にも密着して押圧力を与えられ、確実に地盤を保持できると共に、コア部と押圧部とを組立てて一体化する場所をアンカー工事の現場など任意に選んで組立てることができ、コア部と各押圧部とを分割状態で搬入でき、各部材を人手でも搬入可能となって従来施工が難しかった状況でも施工可能となり、様々な箇所に適用できるという効果を奏する。また、アンカー引張部材の緊張力をコア部及び押圧部で受け、膨張体には地面直角方向への押圧力以外は加わらないことから、不陸に対応可能である状態を確保しつつ、膨張体をフレーム強度と関わりなく必要最小限の量のみ配設でき、軽量化とコストダウンが図れるという効果を有する。さらに、押圧部の残りの開放部分に所定の充填材を入れて重量を増加させ、押圧力を一層高めることができ、特に充填材として土を入れた場合にはこの土部分に植物を植えて施工箇所の緑化も図れるという効果を有する。
【００４０】
また、本発明によれば、複数の略枠状の押圧部同士を略環状に連結して中央の略筒状部分をコア部となし、各押圧部の開放部分に収納している所定の膨張体を膨張させて地盤表面に密着させ、この状態でアンカー引張部材とコア部を固定して地盤を保持させることにより、軽量で簡略な構造ながら適度な設置面積を有する押圧部で地盤の保持面積を十分確保し、且つ膨張した膨張体が地盤表面の不陸部分にも密着して押圧力を与えられ、確実に地盤を保持できると共に、押圧部を組立てて一体化する場所をアンカー工事の現場など任意に選んで組立てることができ、各押圧部を個別に搬入でき、各部材を人手でも搬入可能となって従来施工が難しかった状況でも施工可能となり、様々な箇所に適用できるという効果を有する。さらに、アンカー引張部材の緊張力を押圧部で受け、膨張体には地面直角方向への押圧力以外は加わらないことから、不陸に対応可能である状態を確保しつつ、膨張体をフレーム強度と関わりなく必要最小限の量のみ配設でき、軽量化とコストダウンが図れるという効果を有する。加えて、コア部として押圧部の一部を使用することで別部材を用いる必要がなく、部品点数を減らして搬入性の向上と施工の低コスト化が図れるという効果を有する。
【００４１】
また、本発明によれば、コア部に取付けられた押圧部を隣接する他の押圧部に固定可能とし、コア部周囲の各押圧部同士を連結して一体化することにより、押圧部を人手で搬入可能な重量を実現する強度としても、隣接する押圧部同士の連結で強度を著しく向上させられると共に、押圧部で負担可能な地盤の押圧力を増加させられ、確実に地盤を押圧できるという効果を有する。
【００４２】
また、本発明によれば、押圧部の外側面に別の押圧部の外側面を取付可能として、押圧部同士を連結可能とすることにより、押圧部を人手で搬入可能な重量を実現する強度としても、押圧部の外側に別の押圧部を取付け、押圧部同士を連結することで強度を向上させられると共に、押圧面積も効果的に増加させられ、確実に地盤を押圧できるという効果を有する。
【００４３】
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部の拘束用部材間に配設され、硬化材の充填で柔軟な充填用袋を膨張させて地盤の不陸にも細かく対応させて地盤表面に密着させ、膨張後硬化材の硬化で形状を維持する充填用袋を介してアンカー引張部材の緊張力を地盤に押圧力として与えられることにより、地盤の不陸の有無に拘らず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共に、充填用袋への硬化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。
【図面の簡単な説明】
【図１】本発明の一実施の形態に係るグラウンドアンカー用受圧フレームの斜視図及び地盤保持状態断面図である。
【図２】本発明の一実施の形態に係るグラウンドアンカー用受圧フレームの組立工程説明図である。
【図３】本発明の他の実施形態に係るグラウンドアンカー用受圧フレームの押圧部追加取付状態説明図である。
【図４】本発明の別の他実施形態に係るグラウンドアンカー用受圧フレームの斜視図及び地盤保持状態断面図である。
【図５】従来のグラウンドアンカー台座施工法に基づくアンカー台座の一部切欠斜視図である。
【図６】従来のグラウンドアンカー用受圧フレームの平面図及び横断面図である。
【符号の説明】
１、２００ 受圧フレーム
２、２０１ コア部
２ａ、２０１ａ 中心孔
３、３０ 押圧部
３ａ 拘束用部材
３ｂ 貫通孔
４ 充填用袋
１０ アンカー引張部材
５０ 地盤
１００ アンカー台座
１１０ 型枠
１１１ 袋体
１１２ 硬化材
２０２ アーム部
２０３ 底板[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pressure receiving frame for ground anchor used in a ground anchor method.
[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 is further installed on the ground surface, the anchor tension member is fixed to the anchor pedestal integrally with the anchor tension member in a tensioned state 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 these problems, in recent years, a construction method has been used in which concrete is cast on an installation site using a mold having a predetermined shape to produce and use an anchor base. As an example, there is one described in Japanese Patent Registration No. 2699209, which is shown in FIG. FIG. 5 is a partially cutaway perspective view of an anchor pedestal based on a conventional ground anchor pedestal construction method.
[0005]
In the conventional ground anchor pedestal construction method shown in FIG. 5, a mold 110 is formed on the ground 50 serving as a ground exposed portion of the anchor tension member 10 and the ground 50 side is a sheet material having flexibility and water permeability. , A hardened material 112 such as cement milk is press-fitted into the mold 110, and is cured to form the anchor base 100, and the anchor tension member 10 is fixed to the completed anchor base 100.
[0006]
The mold 110 has a substantially cross-shaped planar shape and is formed of a substantially box-shaped body that is open on the ground 50 side, and a bag body 111 filled with a curing material 112 is disposed in combination as the sheet material. It is the composition which is done. After this mold 110 is installed, the anchor base 100 having a predetermined strength is obtained by filling the bag body 111 inside the mold 110 with a curing material 112 such as cement milk and curing it.
[0007]
In this conventional ground anchor pedestal construction method, the anchor pedestal 100 can be constructed at the anchor construction site, and the restriction on the construction location is eliminated. Further, since the bag body 111 located on the ground 50 side of the formwork 110 changes the ground contact shape corresponding to the unevenness of the surface of the ground 50, the uneven distribution of the pressing force with respect to the ground 50 does not occur, and stable ground holding can be performed. .
[0008]
In recent years, a pressure receiving frame in which steel plates are combined in a box shape instead of concrete has been used as another anchor base. As an example, there is one described in Design Registration No. 1058390, which is shown in FIG. FIG. 6 is a plan view and a cross-sectional view of a conventional pressure receiving frame for ground anchor.
The conventional pressure receiving frame 200 shown in FIG. 6 is formed of a substantially box-shaped core portion 201 having a center hole 201a in a penetrating state and a hollow substantially box-shaped body similar to the core portion 201. A configuration including four arm portions 202 arranged in a cross shape and fixed integrally with the core portion 201, and a substantially rectangular bottom plate 203 integrally fixed to the ground surface side of the core portion 201 and the arm portion 202. It is.
[0009]
The pressure receiving frame 200 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.
[0010]
[Problems to be solved by the invention]
The conventional ground anchor pedestal and pressure receiving frame are configured as described above. In the former case, the mold 110 does not work as a strength member even when the mold 110 is left as it is after curing the curing material. The force applied to the anchor pedestal 100 is borne entirely by a hardener and a reinforcing material such as steel wire. To secure a predetermined strength, the anchor pedestal 100 needs to have a certain size or larger. In addition, a large amount of curing material is required, and curing (curing) takes time.
[0011]
Further, although the anchor base 100 itself is formed at the site and does not need to be transported and installed, when the mold 110 is manufactured outside the site, since the mold 110 is a relatively large integral molded product, It cannot be transported and installed, and requires a work machine for transport. For this reason, it has a problem that it is extremely difficult to form the anchor pedestal 100 by installing the mold 110 at a construction site where the working conditions cannot be reached by the work machine. In addition, there is a case where the formwork 110 is manufactured at a construction site with concrete or the like, but in addition to cost increase such as the need for a formwork for manufacturing the formwork, the curing of the part of the formwork The period was added, and there was a problem that the construction period would be further prolonged.
[0012]
On the other hand, in the latter case, although it is not a concrete anchor pedestal, it is heavy, cannot be divided into large shapes, and cannot be assembled on site, so it can be transported and installed without using a truck or crane. Therefore, there is a problem that it is extremely difficult to install the pressure-receiving frame 200 on the slope at a construction site where the working conditions are severe so that the work machine cannot reach.
[0013]
Furthermore, 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 becomes smaller than the conventional, the anchor The pedestal and pressure-receiving frame are required to be lighter and easier to carry, but the conventional anchor pedestal and pressure-receiving frame are larger and larger than necessary, are difficult to handle, and are too large for the applicable ground. However, it has a problem that it is difficult to use in reality.
[0014]
The present invention has been made in order to solve the above-described problems. The ground contact area of the portion for holding the ground is ensured, and the ground can be securely held, and the weight can be reduced and the assembly from the divided state can be performed. An object of the present invention is to provide a pressure receiving frame for a ground anchor that can be easily brought into the field as a simple structure, eases installation conditions, and reduces the labor and cost of the entire anchor work.
[0015]
[Means for Solving the Problems]
  The pressure receiving frame for ground anchor according to the present invention includes at least a core portion having a center hole in a penetrating state and a plurality of pressing portions arranged around the core portion, one end portion being fixed in the ground and the other end In the pressure receiving frame for ground anchor supported on the ground surface by an anchor tension member whose portion extends to the ground, the pressing portion is formed of a substantially frame-like body having an open portion penetrating in the direction perpendicular to the ground at the center. ,A predetermined restraining member end is fixed to each of the opposing inner side surfaces of the pressing portion.Constraining members are integrally installed between the inner surfacesAnd leaving the open part above the restraining member,The core part is formed of a substantially box-like body having a plurality of parts to which the pressing part side part can be attached on the peripheral side surface, and is disposed at a position closer to the ground surface than the restraining member in the open part of the pressing part. Installed, as required, with specified expansion limit or ambientRestraining member and ground surfaceAnd a predetermined inflating body for maintaining the shape after the expansion,
  The core portion integrally attached to the periphery of the pressing portion is integrated with the ground portion of the anchor tension member.Is.
[0016]
As described above, in the present invention, a plurality of substantially frame-shaped pressing portions are attached to and integrated with the core portion of the substantially box-shaped body, and the predetermined expansion body stored in the open portion at the center of each pressing portion is expanded. In this state, the anchor tension member and the core part are fixed and the ground is held to secure the ground holding area with a pressing part that has a moderate installation area with a light and simple structure. In addition, the expanded body is in close contact with the non-land portion of the ground surface and is given a pressing force, so that the ground can be securely held, and the place where the core portion and the pressing portion are assembled and integrated is the site of anchor construction. The core part and each pressing part can be carried in a divided state, and each member can be carried in by hand, making it possible to work even in situations where conventional construction was difficult and applicable to various places it can. Further, since the tension of the anchor tension member is received by the core portion and the pressing portion, and the expansion body is not subjected to any pressing force other than the pressing force in the direction perpendicular to the ground surface, the expansion body is secured while being able to cope with unevenness. Can be installed in a minimum amount regardless of the frame strength, which can reduce weight and cost. In addition, a predetermined filler can be added to the remaining open portion of the pressing portion to increase the weight, and the pressing force can be further increased. In particular, when soil is added as a filler, a plant is planted in this soil portion. Greening of construction sites can also be achieved.
[0017]
  The ground anchor pressure receiving frame according to the present invention includes at least a core portion having a center hole in a penetrating state and a plurality of pressing portions arranged around the core portion, and one end portion is fixed in the ground. In the pressure receiving frame for ground anchor supported on the ground surface by an anchor tension member whose other end extends to the ground, the pressing portion is a substantially frame-like body having an open portion penetrating in the direction perpendicular to the ground at the center. Formed,A predetermined restraining member end is fixed to each of the opposing inner side surfaces of the pressing portion.Constraining members are integrally installed between the inner surfacesAnd leaving the open part above the restraining member,The core portion is formed of a substantially cylindrical portion at the center formed by connecting the respective pressing portions in a substantially ring shape between side surfaces, and is disposed at a position closer to the ground surface than the restraining member in the open portion of the pressing portion. , Prescribed expansion limit or ambient as requiredRestraining member and ground surfaceAnd a predetermined inflating body that maintains the shape after expansion.,  The core part assembled by integrally connecting the pressing parts is integrated with the ground exposed part of the anchor tension member.Is.
[0018]
As described above, in the present invention, a plurality of substantially frame-shaped pressing portions are connected in a substantially annular shape, the central substantially cylindrical portion is formed as a core portion, and a predetermined expansion accommodated in an open portion of each pressing portion. The body is inflated and brought into close contact with the ground surface. In this state, the anchor tension member and the core portion are fixed to hold the ground, thereby holding the ground with a pressing portion having an appropriate installation area with a light and simple structure. In addition, the expanded body is in close contact with the uneven part of the ground surface and is given a pressing force, so that the ground can be held securely and the place where the pressing part is assembled and integrated is the site of anchor construction. It can be arbitrarily selected and assembled, each pressing part can be carried in individually, each member can be carried in manually, and it can be constructed even in a situation where conventional construction is difficult, and can be applied to various places. In addition, the tension of the anchor tension member is received by the pressing part, and the expansion body is not subjected to any pressing force other than the pressing force in the direction perpendicular to the ground surface. Regardless of this, only the minimum required amount can be installed, reducing weight and cost. Furthermore, it is not necessary to use another member by using a part of the pressing portion as the core portion, and the number of parts can be reduced to improve the carry-in performance and reduce the construction cost.
[0019]
Moreover, the pressure receiving frame for ground anchors according to the present invention may include the other pressing portion adjacent to the side surface at a position where the pressing portion is adjacent to another pressing portion disposed around the same core portion, as necessary. Can be connected together.
As described above, in the present invention, the pressing portion disposed around the core portion can be fixed to the other pressing portions adjacent to each other, and the pressing portions around the core portion are connected and integrated to form a pressing portion. As strength to realize the weight that can be carried manually, the strength can be remarkably improved by connecting adjacent pressing portions, and the pressing force of the ground that can be borne by the pressing portion can be increased, so that the ground can be pressed reliably. .
[0020]
  Moreover, the pressure receiving frame for ground anchors according to the present invention is provided with the pressing portion as necessary.A separate pressing part not adjacent to the same core part is additionally provided on the outer peripheral side of the two and connected together.Is.
  As described above, in the present invention, the outer surface of the pressing portion can be attached to the outer surface of another pressing portion, and the pressing portions can be connected to each other, thereby achieving a strength capable of manually loading the pressing portion. Even if it attaches another press part on the outer side of a press part and connects press parts, strength can be improved and a press area can also be increased effectively and it can press a ground reliably.
[0021]
In the ground anchor pressure receiving frame according to the present invention, if necessary, the inflatable body is formed of a substantially bag-like filling bag having flexibility, and the restraining member of the pressing portion and the ground surface A predetermined amount of a predetermined curing material is filled in the filling bag in a state of being disposed between the two to expand the filling bag, and the curing material is cured after filling.
In this way, in the present invention, the filling bag is disposed as an inflating body between the ground surface and the restraining member of the pressing portion, and the flexible filling bag is inflated by filling with the curing material to prevent the ground from being uneven. Presence or absence of unevenness of the ground by applying the tension of the anchor tension member as a pressing force to the ground through a filling bag that closely contacts the ground surface and maintains the shape by hardening of the hardened material after expansion Regardless of this, the pressing force can be properly transmitted to the ground, and the ground can be reliably held, and the filling work of the curing material into the filling bag is relatively easy, and the efficiency of the whole work can be improved and the cost can be reduced.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a ground anchor pressure receiving frame and a ground holding sectional view according to the present embodiment, and FIG. 2 is an explanatory diagram of an assembly process of the ground anchor pressure receiving frame according to the present embodiment.
[0023]
In each of the drawings, a pressure receiving frame 1 according to the present embodiment includes a core portion 2 of a steel plate-like hollow substantially box-like body having a center hole 2a in a penetrating state, and the core portion 2 fixed to each side surface of the core portion 2. It is a structure provided with four substantially frame-shaped pressing parts 3 symmetrically arranged at the center, and a filling bag 4 as an inflating body that is integrally disposed near the ground surface side of each pressing part 3.
[0024]
The core portion 2 is formed of a hollow, substantially box-like body having a square planar shape, each side surface is an attachment portion of the pressing portion 3 side, and through holes are respectively formed on the upper and lower surfaces. In this configuration, the upper and lower through holes and the substantially box-shaped body are formed as a central hole 2a through which the ground exposed portion of the anchor tension member 10 passes. In addition, the core part 2 is made into a lightweight structure that can be carried by hand, and can be easily carried into the site and has excellent workability. The core 2 can be filled with a predetermined filler as necessary after installation.
[0025]
The pressing portion 3 has an open portion that penetrates in the vertical direction of the ground 50 in the center, and is formed of a steel plate frame that has an octagonal planar shape, and is constrained between inner surfaces facing the open portion. This is a structure in which the member 3a is constructed integrally. The restraining member 3 a is a substantially plate-like body having a predetermined strength, and the end edge portion is fixed to the inner side surface of the pressing portion 3. The restraining member 3a is formed with a large number of holes (not shown) and imparts water permeability and air permeability to the restraining member 3a.
[0026]
The filling bag 4 is formed of a hollow bag-like body made of a strong flexible material that is filled with a hardening material such as grout, and between the restraining member 3a and the ground 50 surface at the open portion of the pressing portion 3. The hardened material is housed in a predetermined amount and expanded to a predetermined expanded state, and finally the expanded state is maintained by curing of the hardened material. When the filling bag 4 is inflated, it comes into contact with the restraining member 3a of the pressing portion 3 and the restraining member 3a restrains the movement in the direction away from the surface of the ground 50, while facing the reverse ground 50 surface side. It is a mechanism that expands and adheres to the surface of the ground 50.
[0027]
Next, the construction operation of the pressure receiving frame based on the above configuration and the load transmission state after fixing will be described. First, with respect to the construction site where the anchor tension member 10 is disposed with one end fixed in the ground 50 and the other end exposed to the ground, the core portion 2, the pressing portion 3, and the filling bag 4. Are carried in individually. Then, the filling bag 4 is stored in advance under the restraining member 3 a in the open portion of the pressing portion 3 and integrated with the pressing portion 3. Thereafter, the core portion 2 is placed on the anchor tension member 10 placement site of the ground 50 while the ground exposed portion of the anchor tension member 10 passes through the center hole 2a of the core portion 2.
[0028]
Further, the pressing part 3 is placed at a position adjacent to the core part 2 in such a direction that the filling bag 4 of the open part is closer to the surface of the ground 50, and the pressing part 3 side is bolted to each side of the core part 2. It is fixed integrally by welding or the like (see FIG. 2), and the adjacent pressing portions 3 are also fixed together by bolting, welding or the like, and the assembled state as the pressure receiving frame 1 at the place where the anchor tension member 10 is placed To do. At this time, if necessary, a predetermined filler can be filled into the core portion 2 and the filler can be cured to increase the weight and strength of the core portion 2.
[0029]
Thereafter, the filling bag 4 is filled with a predetermined curing material from the outside and expanded, the gap between the restraining member 3a of the pressing portion 3 and the ground 50 is filled, and the curing material is cured in the expanded state. When the core portion 2 is fixed to the ground exposed portion of the anchor tension member 10 after the hardening material is cured, the entire pressure receiving frame 1 is fixed to the ground 50, and the installation on the ground 50 is completed (FIG. 1 (B )reference).
[0030]
Furthermore, if necessary, soil or the like can be put in the upper region of the restraining member 3a where the pressing portion 3 is open, and a plant can be planted in this soil portion to increase the weight of the construction site. This further increases the pressing force.
Next, the load transmission state in the pressure receiving frame according to this embodiment will be described. In the core portion 2 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 compressed toward the ground 50 surface side toward the side surface via the upper surface of the core portion 2. It is transmitted as stress.
[0031]
The compressive stress transmitted to the side surface portion of the core portion 2 is transmitted to the pressing portion 3 fixed to the outside of the side surface portion as a force directed toward the surface side of the ground 50. Thus, the force transmitted to each pressing portion 3 toward the ground surface side is finally transmitted to the cured filling bag 4 via the restraining member 3a inside the pressing portion 3, and the ground 50 is transferred from the lower surface of the filling bag 4 to the ground 50. As a pressing force, the ground 50 can be held.
[0032]
As described above, in the pressure receiving frame according to the present embodiment, the frame-shaped pressing portion 3 is disposed around the core portion 2 fixed to the anchor pulling member 10, and filling is performed at the center position of the pressing portion 3. The bag 4 is disposed, the filling bag 4 is brought into close contact with the surface of the ground 50 by the expansion of the filling material, and the force from the anchor tension member 10 is applied as a pressing force to the ground 50 through the filling bag 4. Thus, the holding area of the ground 50 is sufficiently ensured by the pressing portions 3 and the filling bags 4, and the filling bag 4 made of a flexible material is in close contact with the surface of the ground 50, and also on the unlanded portion of the ground 50. An appropriate pressing force can be transmitted and the ground 50 can be reliably held. In addition, each necessary member can be carried into the anchor construction site in a divided state, and can be carried in manually, so that it can be constructed even in a situation where conventional construction is difficult, and can be applied to various construction sites.
[0033]
In the pressure receiving frame according to the embodiment, the pressing portion 3 is attached to the periphery of the core portion 2 to form a set of pressure receiving frames 1. However, the present invention is not limited to this, as shown in FIG. Another pressing portion 30 that is not adjacent to the same core portion 2 may be added to the outer peripheral side of the pressing portion 3 so as to be integrally connected, and the pressing area of the ground 50 is extended to the outside of the pressure receiving frame 1. In addition, the strength can be improved by connecting the pressing portions, and the ground 50 can be reliably pressed and held.
[0034]
In the pressure receiving frame according to the above-described embodiment, the core portion 2 is formed as a hollow, substantially box-like body, and the pressing portion 3 side portion is attached to each side surface to form a set of pressure receiving frames 1. However, the present invention is not limited to this, and a substantially cylindrical portion at the center formed by connecting a plurality of pressing portions 3 in a substantially annular manner at the side surfaces is formed as a core portion 2, and a substantially box shape that transmits a load to the pressing portion 3 as a core portion. A separate member such as a body may be used. In particular, as shown in FIG. 4, as the pressing portion 3, a substantially frame-like body provided with a gap serving as a groove for welding is used, and each pressing portion 3. When it is set as the structure which mutually connects by welding in each clearance gap position, the welding location for a connection can be kept to the minimum necessary, and the core 50 can be kept, leaving the state which can hold the ground 50 reliably. Combined with the fact that separate parts can be omitted, the assembly efficiency can be improved. Further cost reductions along with the can be achieved. Furthermore, the through-hole 3b which lets a volt | bolt pass in each side of the press part 3 can be formed beforehand, and the adjacent press parts 3 can also be fixed with a volt | bolt as needed, and the connection strength of press part 3 is made more. The holding power of the ground 50 can be increased further.
[0035]
In the pressure receiving frame according to the embodiment, the pressing portion 3 is configured as an octagonal planar frame. However, the pressing portion 3 is not limited thereto, and the pressing portion 3 is a polygon such as a square or a triangle. A plate-like body can continuously form a frame shape such as a circular planar shape, and a substantially frame-like body that can be in close contact with the core portion 2 and / or another pressing portion 3 can be used. It is possible to achieve high strength in the direction perpendicular to the ground with a simple structure. Furthermore, the height direction dimension of the substantially frame-shaped portion that forms the pressing portion 3 is not limited to the configuration in which all of the pressing portions 3 coincide with each other, and the substantially frame-shaped portion of the pressing portion 3 corresponds to the inclination of the ground or the like. A configuration in which the height direction dimension is different at each position may be adopted.
[0036]
Further, in the pressure receiving frame according to the above-described embodiment, the planar shape of the core portion 2 is rectangular, and the four pressing portions 3 are fixed to the core portion 2. Is a substantially box-like body whose planar shape is a polygon or circle other than a quadrangle, and a predetermined number of pressing portions 3 corresponding to the side surfaces of the core portion 2 are symmetrically arranged on the core portion 2 respectively. It can also be set as the structure fixed.
[0037]
Further, in the pressure receiving frame according to the above embodiment, the core part 2 and the pressing part 3 are all made of a steel plate, but the invention is not limited to this. You can also In addition, the filling bag 4 is made of a flexible material, but in addition, the filling bag 4 is made of a flexible and water-permeable material and is filled inside. It can also be set as the structure which a liquid component oozes out outside in the predetermined | prescribed ratio among materials, and the liquid component of a hardening | curing material osmose | permeates the ground 50 and hardens | cures, and adhesion between the filling bag 4 and the ground 50 is strengthened Therefore, the ground 50 can be securely held.
[0038]
Furthermore, in the pressure receiving frame according to the embodiment, the restraining member 3a inside the pressing portion 3 is configured to be a substantially plate-like body. However, the present invention is not limited to this, and the restraining member 3a may be a steel wire or lightly. A linear body made of carbon fiber, aramid fiber or the like having high tensile strength is used, and both ends of the linear body are respectively fixed to the inner side surfaces of the pressing portion 3 facing each other, and a plurality of wires are formed in a predetermined tension state in the pressing portion 3. It can also be set as the structure to construct. In addition to the linear body, a lightweight and strong sheet body or rod-shaped body may be used.
[0039]
【The invention's effect】
As described above, according to the present invention, a plurality of substantially frame-like pressing portions are attached to and integrated with the core portion of the substantially box-shaped body, and the predetermined inflating body stored in the open portion at the center of each pressing portion is provided. By inflating and intimately adhering to the ground surface, the anchor tension member and the core part are fixed and the ground is held in this state, so that the pressing area with an appropriate installation area is sufficient with a lightweight and simple structure. Secured and inflated expansion body is also in close contact with the uneven part of the ground surface and given pressing force, it can hold the ground securely and anchor work where the core part and pressing part are assembled and integrated The core part and each pressing part can be carried in a divided state, and each member can be carried in manually, making it possible to construct even in situations where conventional construction was difficult, and various places The effect that can be applied to To. In addition, since the tension force of the anchor tension member is received by the core portion and the pressing portion, and the expansion body is not subjected to a pressing force other than the pressing force in the direction perpendicular to the ground, Can be disposed only in a minimum amount irrespective of the frame strength, and it has the effect of reducing weight and cost. Furthermore, a predetermined filler can be added to the remaining open portion of the pressing portion to increase the weight, and the pressing force can be further increased. In particular, when soil is added as a filler, a plant is planted in this soil portion. It has the effect of greening construction sites.
[0040]
In addition, according to the present invention, a plurality of substantially frame-shaped pressing portions are connected in a substantially annular shape, the central substantially cylindrical portion is formed as a core portion, and the predetermined expansion accommodated in the open portion of each pressing portion The body is inflated and brought into close contact with the ground surface. In this state, the anchor tension member and the core portion are fixed to hold the ground, thereby holding the ground with a pressing portion having an appropriate installation area with a light and simple structure. In addition, the expanded body is in close contact with the uneven part of the ground surface and is given a pressing force, so that the ground can be held securely and the place where the pressing part is assembled and integrated is the site of anchor construction. It can be arbitrarily selected and assembled, each pressing part can be carried in individually, each member can be carried in manually, it can be constructed even in situations where conventional construction was difficult, and it has the effect that it can be applied to various places . In addition, the tension of the anchor tension member is received by the pressing part, and no pressure is applied to the expandable body in the direction perpendicular to the ground surface. Regardless of this, only the minimum necessary amount can be provided, and the effect is that weight reduction and cost reduction can be achieved. In addition, it is not necessary to use a separate member by using a part of the pressing portion as the core portion, and there is an effect that the number of parts can be reduced to improve carryability and reduce the construction cost.
[0041]
Further, according to the present invention, the pressing portion attached to the core portion can be fixed to another pressing portion adjacent to the pressing portion, and the pressing portions around the core portion are connected and integrated to form a manual operation. As the strength that realizes the weight that can be carried in, the strength can be significantly improved by connecting adjacent pressing parts, the pressing force of the ground that can be borne by the pressing part can be increased, and the ground can be reliably pressed Has an effect.
[0042]
In addition, according to the present invention, the outer surface of the pressing portion can be attached to the outer surface of another pressing portion, and the pressing portions can be connected to each other, thereby realizing a weight capable of manually loading the pressing portion. However, it is possible to improve the strength by attaching another pressing portion to the outside of the pressing portion and connecting the pressing portions to each other, and the pressing area can be effectively increased, so that the ground can be reliably pressed. .
[0043]
Further, according to the present invention, a filling bag is disposed as an inflating body between the ground surface and the restraining member of the pressing portion, and the flexible filling bag is inflated by filling with a hardener, so that the ground can be uneven. Presence of unevenness of the ground by applying the tension of the anchor tension member as a pressing force to the ground through a filling bag that closely contacts the ground surface and maintains the shape by hardening of the hardened material after expansion. Regardless of the effect, the pressure can be properly transmitted to the ground, the ground can be held securely, the work of filling the filling bag with the hardener is relatively easy, and the efficiency of the whole work can be improved and the cost can be reduced. Have
[Brief description of the drawings]
FIG. 1 is a perspective view and a ground holding state sectional view of a pressure receiving frame for ground anchor according to an embodiment of the present invention.
FIG. 2 is an assembly process explanatory diagram of a ground anchor pressure receiving frame according to an embodiment of the present invention.
FIG. 3 is an explanatory diagram of an additional attachment state of a pressing portion of a pressure receiving frame for ground anchor according to another embodiment of the present invention.
FIG. 4 is a perspective view and a ground holding state sectional view of a pressure receiving frame for ground anchor according to another embodiment of the present invention.
FIG. 5 is a partially cutaway perspective view of an anchor pedestal based on a conventional ground anchor pedestal construction method.
FIG. 6 is a plan view and a cross-sectional view of a conventional pressure receiving frame for a ground anchor.
[Explanation of symbols]
1,200 pressure receiving frame
2, 201 Core part
2a, 201a Center hole
3, 30 Pressing part
3a Restraint member
3b Through hole
4 Filling bags
10 Anchor tension member
50 ground
100 Anchor base
110 formwork
111 bags
112 Curing material
202 Arm
203 Bottom plate

Claims (5)

貫通状態の中心孔を有するコア部と、前記コア部周囲に配置される複数の押圧部とを少なくとも備え、地盤中に一端部が固定され且つ他端部が地上に延出しているアンカー引張部材で地盤表面に支持されるグラウンドアンカー用受圧フレームにおいて、
前記押圧部が、中心部に地面直角方向へ貫通する開放部分を有する略枠状体で形成され、
前記押圧部の対向する内側面に所定の拘束用部材端部をそれぞれ固定して内側面間に拘束用部材を一体に架設し、当該拘束用部材上側に前記開放部分を残し、
前記コア部が、周側面に前記押圧部側部を取付可能な部分を複数有する略箱状体で形成されてなり、
前記押圧部の開放部分における前記拘束用部材より地盤表面寄りの位置に配設され、必要に応じて所定の膨張限界又は周囲の拘束用部材及び地盤表面に達するまで膨張すると共に、膨張後の形状を維持する所定の膨張体を備え、
前記押圧部を周囲に一体に取付けられたコア部が、前記アンカー引張部材の地上部分と一体化されることを
特徴とするグラウンドアンカー用受圧フレーム。An anchor tension member having at least a core portion having a center hole in a penetrating state and a plurality of pressing portions arranged around the core portion, one end portion being fixed in the ground and the other end portion extending to the ground In the pressure receiving frame for ground anchor supported on the ground surface at
The pressing part is formed of a substantially frame-like body having an open part penetrating in the direction perpendicular to the ground at the center part,
A predetermined restraining member end is fixed to each of the opposing inner side surfaces of the pressing portion, and a restraining member is integrally constructed between the inner side surfaces , leaving the open portion on the restraining member upper side,
The core part is formed of a substantially box-like body having a plurality of parts to which the pressing part side part can be attached on the peripheral side surface,
It is disposed at a position closer to the ground surface than the restraining member in the open portion of the pressing portion, and expands until reaching a predetermined expansion limit or the surrounding restraining member and the ground surface as necessary, and the shape after the expansion A predetermined inflatable body for maintaining
A pressure receiving frame for a ground anchor , wherein a core portion integrally attached around the pressing portion is integrated with a ground portion of the anchor tension member . 貫通状態の中心孔を有するコア部と、前記コア部周囲に配置される複数の押圧部とを少なくとも備え、地盤中に一端部が固定され且つ他端部が地上に延出しているアンカー引張部材で地盤表面に支持されるグラウンドアンカー用受圧フレームにおいて、
前記押圧部が、中心部に地面直角方向へ貫通する開放部分を有する略枠状体で形成され、
前記押圧部の対向する内側面に所定の拘束用部材端部をそれぞれ固定して内側面間に拘束用部材を一体に架設し、当該拘束用部材上側に前記開放部分を残し、
前記コア部が、前記各押圧部を側面同士で略環状に連結して生じる中央の略筒状部分からなり、
前記押圧部の開放部分における前記拘束用部材より地盤表面寄りの位置に配設され、必要に応じて所定の膨張限界又は周囲の拘束用部材及び地盤表面に達するまで膨張すると共に、膨張後の形状を維持する所定の膨張体を備え、
前記押圧部を一体に連結して組立てられてなるコア部が、前記アンカー引張部材の地上露出部分と一体化されることを
特徴とするグラウンドアンカー用受圧フレーム。An anchor tension member having at least a core portion having a center hole in a penetrating state and a plurality of pressing portions arranged around the core portion, one end portion being fixed in the ground and the other end portion extending to the ground In the pressure receiving frame for ground anchor supported on the ground surface at
The pressing part is formed of a substantially frame-like body having an open part penetrating in the direction perpendicular to the ground at the center part,
A predetermined restraining member end is fixed to each of the opposing inner side surfaces of the pressing portion, and a restraining member is integrally constructed between the inner side surfaces , leaving the open portion on the restraining member upper side,
The core portion is composed of a substantially cylindrical portion at the center formed by connecting the respective pressing portions in a substantially ring shape between the side surfaces,
It is disposed at a position closer to the ground surface than the restraining member in the open portion of the pressing portion, and expands until reaching a predetermined expansion limit or the surrounding restraining member and the ground surface as necessary, and the shape after the expansion comprising a predetermined expansion body to maintain,
A pressure receiving frame for a ground anchor , wherein a core portion assembled by integrally connecting the pressing portions is integrated with a ground exposed portion of the anchor tension member . 前記請求項１に記載のグラウンドアンカー用受圧フレームにおいて、
前記押圧部が、同じ前記コア部周囲に配置される他の押圧部と隣接する位置の側面に、前記隣接する他の押圧部を一体に連結可能とされてなることを
特徴とするグラウンドアンカー用受圧フレーム。In the pressure receiving frame for ground anchor according to claim 1,
For the ground anchor, wherein the pressing portion can be integrally connected to the side surface at a position adjacent to another pressing portion arranged around the same core portion. Pressure receiving frame. 前記請求項１ないし３のいずれかに記載のグラウンドアンカー用受圧フレームにおいて、
前記押圧部の外周側に、同じコア部に隣接しない別の押圧部を追加して配設して一体に連結することを
特徴とするグラウンドアンカー用受圧フレーム。In the pressure receiving frame for ground anchor according to any one of claims 1 to 3,
A pressure receiving frame for a ground anchor, wherein another pressing portion that is not adjacent to the same core portion is additionally arranged on the outer peripheral side of the pressing portion and connected together . 前記請求項１ないし４のいずれかに記載のグラウンドアンカー用受圧フレームにおいて、
前記膨張体が、可撓性を有する略袋状体の充填用袋で形成され、
前記押圧部の拘束用部材と地盤表面との間に配設された状態の前記充填用袋内に所定の硬化材を所定量充填して充填用袋を膨張させ、充填後に硬化材を硬化させることを
特徴とするグラウンドアンカー用受圧フレーム。In the pressure receiving frame for ground anchors according to any one of claims 1 to 4,
The inflatable body is formed of a substantially bag-like filling bag having flexibility,
A predetermined amount of the curing material is filled in the filling bag in a state of being disposed between the restraining member of the pressing portion and the ground surface, the filling bag is inflated, and the curing material is cured after filling. A pressure receiving frame for a ground anchor characterized by that.
JP2000385915A 2000-12-19 2000-12-19 Pressure receiving frame for ground anchor Expired - Fee Related JP4378048B2 (en)

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Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6040500A (en) * 1983-08-11 1985-03-02 旭化成株式会社 Anchor bolt
JP3351663B2 (en) * 1995-08-30 2002-12-03 新技術工営株式会社 Anchor anchoring pedestal used for slope stabilization method
JP3683029B2 (en) * 1996-04-08 2005-08-17 株式会社クボタ Pressure plate for anchor method
JP3455812B2 (en) * 1997-05-08 2003-10-14 高麗夫 三輪 Ground reinforcement method
JP3113634B2 (en) * 1998-07-13 2000-12-04 黒沢建設株式会社 Slope protection block
JP2000129684A (en) * 1998-10-22 2000-05-09 Nippon Steel Corp Slope face press frame structure, framework structure, and slope face reinforcing method

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