JP4564155B2 - Parachute type anchor and foundation construction method using the same - Google Patents

Parachute type anchor and foundation construction method using the same Download PDF

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JP4564155B2
JP4564155B2 JP2000312839A JP2000312839A JP4564155B2 JP 4564155 B2 JP4564155 B2 JP 4564155B2 JP 2000312839 A JP2000312839 A JP 2000312839A JP 2000312839 A JP2000312839 A JP 2000312839A JP 4564155 B2 JP4564155 B2 JP 4564155B2
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sheet pile
parachute
steel pipe
anchor
press
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JP2002121735A (en
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保宏 藤田
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保宏 藤田
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Description

【0001】
【発明の属する技術分野】
本発明はパラシュート式アンカー及びそれを用いた基礎構築方法に関し、さらに詳しくは、敷設した土中で広く大きく開くパラシュート式アンカー及びそれを用いた基礎構築方法に関する。
【0002】
【従来の技術】
日本の平野部は、軟弱地層特有の軟土等の水分を多く含む土質の腐食土層、湿地、泥炭層、粘土層、沈泥層、関東ローム層等々あり、これらは日本のみならず世界中に分布している。拡大傾向にある、軟弱地盤上の建築物、構造物の基礎工事、施工工事等は最も難工事で、軟弱地盤用の土木建築施工工事では、大別すると次のような方法がある。まず、土質、土壌改良、表層改良等であるが、ベタ基礎等の基礎作りには大量に出る泥水、残土処理が必要となり、近年、産廃問題、環境問題が起きている。又、基礎支持杭等の打設工法であるが、この打撃工法は騒音や振動等の環境問題が発生するため、都市部や近郊においては採用が不可能となっている。又、このように、あらゆる土木基礎施工技術を駆使しても、軟弱地盤上に新築する住宅等は、年数の経過とともに、不等沈下等の原因で壁にひびが入ったり、窓等のサッシに隙間が出来たり、又、建具等の開閉の不都合が生じる等、欠陥住宅が増え続けている。
【0003】
【発明が解決しようとする課題】
従前の軟弱地盤上の建築物、構造物の基礎工事では、軟弱地盤の特殊な土質を相手に土木技術を駆使し、多種多様の工法で施工している。一般には、大量に打設するコンクリートパイル等の打撃杭を採用している現場が多い。時間の経過とともに打設杭も安定しなかったり揺らいだり、杭の自重で沈下する等、工事完了後に不都合な問題が起きかねない。
【0004】
そこで、本発明は、従前のような欠点や不都合を改善し、安全で安心できる、居住性の高い基礎を実現するためのパラシュート式アンカー及びそれを用いた基礎構築方法を提供しようとするものである。
また、残土は少なく、産廃、環境問題に触れることもなく、工事中の騒音、振動等の公害も出さず、又、工期短縮で安定した積荷力は、従前のいかなる基礎の積荷力に劣らないパラシュート式アンカー及びそれを用いた基礎構築方法を提供しようとするものである。具体的には、一本の棒状に組み立てられたアンカーを地中に敷設し、地中で広く大きくパラシュートのごとく開放することにより軟弱地盤の特殊な土質に対応、鋼材で出来た頑丈で堅牢なパラシュート式アンカー及びそれを用いた基礎構築方法を提供しようとするものである。
【0005】
【課題を解決するための手段】
上記の目的を達成するため請求項1に記載の本発明は、上端側にネジ山が設けられたネジ山付き主柱鋼管内部にスライド鋼管をその末端がネジ山付き主柱鋼管の先端から突出するように配置し、突出したスライド鋼管の末端に矢板蝶番受台を固定し、そして、石突に固定した主軸突起パイプの上端をスライド鋼管内に位置するように配置すると共に、矢板蝶番受台の周囲に先端が鋭角とされた複数枚の矢板を放射状に揺動可能に装着し、ネジ山付き主柱鋼管と矢板の表面を矢板の揺動を阻害しないように輪環棒で連結すると共に石突と矢板の裏面を矢板の揺動を阻害しないように支持板で連結して構成され、矢板を折り畳んで棒状とした状態で土中に敷設し、そして、スライド鋼管を押し込むことにより矢板が輪環棒と支持板に支持されながら矢板蝶番受台との取り付け部を支点として揺動することにより放射状に開いて土中に打ち込まれるようにされたことを特徴とするパラシュート式アンカーを提供する。
【0006】
上記の目的を達成するため請求項2に記載の本発明は、請求項1に記載のパラシュート式アンカーにおいて、蝶番受台を中心に放射状に装着した複数枚の矢板と矢板との間に折り畳み式の土圧ヨロイ板を取り付けると共に、支持板と支持板との間にも折り畳み式の下部土圧ヨロイ板を取り付け、使用時には土圧ヨロイ板及び下部土圧ヨロイ板を折り畳んで棒状とした状態で土中へ敷設し、矢板が開いたときにはそれに伴って土圧ヨロイ板及び下部土圧ヨロイ板が開くようにしたことを特徴とする。
【0007】
上記の目的を達成するため請求項3に記載の本発明は、請求項1又は2に記載のパラシュート式アンカーにおいて、石突の周囲に主軸突起パイプを介して注入したセメントミルクを排出する複数の排出口を設け、主軸突起パイプから注入されたセメントミルクを複数の排出口から排出することによりセメント施工可能に構成されたことを特徴とする。
【0008】
上記の目的を達成するため請求項4に記載の本発明は、請求項1から3のいずれか1項に記載のパラシュート式アンカーにおいて、輪環棒の矢板の表面への取り付け位置及び支持板の矢板裏面への取り付け位置を矢板の先端近傍とすることにより矢板の開放時にかかる土圧力を分散するようにしたことを特徴とする。
【0009】
上記の目的を達成するため請求項5に記載の本発明は、請求項1から4のいずれか1項に記載のパラシュート式アンカーを用いた基礎構築方法において、パラシュート式アンカーを敷設する縦穴を掘り、縦穴に棒状とされたパラシュート式アンカーをネジ山付き主柱鋼管の一部を地上に残した状態で敷設する工程と、角頭部分に回転を与えることによりスライド鋼管を静かにかつ強力に押し込む圧入棒を備えた太ネジ圧入開放装置をネジ山付き主柱鋼管のネジ山に取り付け、角頭部分に回転を与えることにより圧入棒でスライド鋼管を押し込み、それによって複数の矢板を開くと共に、矢板と矢板との間に折り畳まれていた土圧ヨロイ板及び支持板と支持板との間に折り畳まれていた下部土圧ヨロイ板を開く工程とを含み構成されてなる。
【0010】
上記の目的を達成するため請求項6に記載の本発明は、請求項5に記載のパラシュート式アンカーを用いた基礎構築方法において、太ネジ圧入開放装置が、油圧によって圧入棒を可動させる油圧ジャッキ圧入開放装置であり、油圧によって圧入棒を押し下げ、それによってスライド鋼管を静かにかつ強力に押し込むようにしたことを特徴とする。
【0011】
上記の目的を達成するため請求項7に記載の本発明は、請求項5又は6に記載のパラシュート式アンカーを用いた基礎構築方法において、土中に敷設したパラシュート式アンカーの矢板を開放した後、太ネジ圧入開放装置又は油圧ジャッキ圧入開放装置を外し、ネジ山付き主柱鋼管の上部からセメントミルクを圧入し、主軸突起パイプを介して石突の周囲に設けた排出より排出させることによりさらにコンクリートで固めることを特徴とする。
【0012】
上記の目的を達成するため請求項8に記載の本発明は、請求項5から7のいずれか1項に記載のパラシュート式アンカーを用いた基礎構築方法において、さらに、ネジ山付き主柱鋼管に構築物の土台として利用する基礎構築安定板を固定する工程をさらに備えてなることを特徴とする。
【0013】
本発明のパラシュート式アンカー及びそれを用いた基礎構築方法では、地下に敷設する前のパラシュート式アンカーは、一本の棒状に組み立てられた形状をなし、これを広げると大きな、鋼材で出来た厚く幅広の複数枚の矢板が放射状に設けられる。また、矢板と矢板の間に折り畳み式の土圧ヨロイ板が取り付けられている。さらに、矢板を裏側から支持板で補強すると共に、支持板にも矢板と同様の下部土圧ヨロイ板が装着されている。この土圧ヨロイ板及び下部土圧ヨロイ板が矢板と矢板との間及び支持板と支持板との空間を無くし、水分の多い軟土の中で土圧密度、摩擦抵抗を最大限に利用することで構造物の自重に耐えられる基礎を構築する
【0014】
【発明の実施の形態】
以下、本発明に係るパラシュート式アンカー及びそれを用いた基礎構築方法について図面を参照しつつ説明する。図1は本発明に係るパラシュート式アンカーの一実施形態の組立完成側面図である。
【0015】
図示されたパラシュート式アンカーは、ネジ山付き主柱鋼管1の中に太さ違いのスライド鋼管挿入され、このスライド鋼管2に固定した矢板蝶番受台の円周には複数枚の矢板4が放射状に矢板蝶番受台3との取り付け部を支点として揺動可能に装着されている。また、それぞれの矢板を裏側から補強する支持板14矢板の揺動を阻害しないように取り付けられており、それとは反対側の支持板14の一方は、主軸突起パイプ9と連結されたの石突の円周部分に放射状に取り付けられ手いる。矢板4と矢板4と間には蝶番によって折り畳み可能な土圧ヨロイ板16が取り付けられていると共に支持板14と支持板14との間にも同様に下部土圧ヨロイ板17が設けられている。矢板の先端部は土壌に刺さりやすい鋭角な形状で、パラシュート式アンカーを構成する鋼材は、錆等に強い処理、又は素材を使用することが好ましい
【0016】
ネジ山付き主柱鋼管の末端の円周に矢板と同数の輪環を溶接する。矢板4の先端部の近い場所にも矢板輪環を溶接し、互いの輪環5、6の間に、輪環棒7を矢板の揺動を阻害しないように橋渡し装着する。
【0017】
次に、ネジ山付き主柱鋼管1に太ネジ圧入開放装置18又は油圧ジャッキ圧入開放装置21等のいずれかの装置のネジ山同士を噛み合わせ装着する。後は圧入棒20によってスライド鋼管に強力な加重を加えていくと、スライド鋼管が下にさがり始ると同時に、複数枚の矢板及び土圧ヨロイ板16が放射状に開放し始る。その時にネジ山付き主柱鋼管末端部と矢板に橋渡しした輪環棒7によって矢板が開放時にかかる強力な土圧を分散する。矢板の開放とともに、折り畳まれていた土圧ヨロイ板16及び支持板14との間の下部土圧ヨロイ板17も広がる。同時に主軸突起パイプ9がスライド鋼管内に挿入し終わると、鋼管全体の安定感が増加する。また、広く大きく開放したパラシュートアンカー基礎構築後に、ネジ山付き主柱鋼管に装着した太ネジ圧入開放装置18、又は油圧ジャッキ圧入開放装置21を外し、ネジ山付き主柱鋼管からセメントミルクを圧入する圧入するセメントミルクは主軸突起パイプ9の注入口を通り、石突の円周に設けた排出口11より排出される。これによりパラシュート式アンカーをコンクリートで固めることができ頑丈で堅牢な基礎を構築することができる。また、セメントの圧入施工が終了した後、ネジ山付き主柱鋼管に基礎構築安定板22を装着することで構築物の土台として使用するこのように、軟弱地盤の地下に敷設したパラシュートアンカーは広く大きく開放した矢板4が支持地盤をなし、最大級の土圧摩擦抵抗を受けることで、いかなる積荷重にも耐え、安定した基礎等の居住性を持ち、又、地震等にも強い、パラシュート式アンカー及びそれを用いた基礎構築方法を提供することができる。
【0018】
次に、本発明に係るパラシュート式アンカーの動作を説明しつつ本発明に係るパラシュート式アンカーを用いた基礎構築方法について説明する。本発明に係るパラシュート式アンカーは、複数の矢板4と、矢板4と矢板4の間に配置された土圧ヨロイ板16及び支持板14と支持板14の間に配置された下部土圧ヨロイ板がそれぞれ蝶番で折り畳まれて棒状に形成されおり、この棒状のパラシュート式アンカーを予め垂直に掘られた縦穴に敷設する。そして、ネジ山付き主柱鋼管のネジ山に太ネジ圧入開放装置18又は油圧ジャッキ圧入開放装置21のいずれかを取り付け、ネジ山付き主柱鋼管内のスライドの上部を圧入棒20で加圧していくと、スライド鋼管2に固定している矢板蝶番受台が下に押し込まれ、軟弱地層で矢板及びそれに付随する機構が静かに、かつ強力に複数枚の矢板を外側に向け開放し始める。ネジ山付き主柱鋼管と矢板との間に輪環棒介在させることで、矢板にかかる強力な土圧を分散し、又矢板4と矢板4との間に折り畳まれていた土圧ヨロイ板16が開放され、同様に支持板14と支持板14との間に折り畳まれていた下部土圧ヨロイ板17も開放され、最後に広く大きなパラシュート状のアンカーを開放させる。そして、ネジ山付き主柱鋼管に取り付けた太ネジ圧入開放装置18又は油圧ジャッキ圧入開放装置21を外した後に、ネジ山付き主柱鋼管1から主軸突起パイプ9を介してセメントミルクを圧入するとセメントミルクは石突8の周囲に形成された複数の排出口11から排出されてセメントで固められる。敷設した地下のアンカーをセメントで固めることで、頑丈で堅牢な基礎を構築することができる。また、このパラシュート式アンカーを用いた基礎構築方法では、従前の工法で公害とされている騒音や振動が全く出ないのが特徴である。
【0019】
【実施例】
次に、本発明に係るパラシュート式アンカー及びそれを用いた基礎構築方法の一実施例を図面に基づいて説明する。図1は本発明に係るパラシュート式アンカーの一実施例の組立完成側面図である。図示されたネジ山付き主柱鋼管1に太さ違いのスライド鋼管2が挿入されている。そして、スライド鋼管の末端には矢板蝶番受台が固定されている。矢板蝶番受台を中心に複数枚の矢板が放射状に装着されている。尚、矢板の背高は山形形状で幅広で厚い鋼材が使用され、先端は土に刺さりやすいように鋭角になっている。ネジ山付き主柱鋼管の末端に矢板と同数の輪環溶接により取り付けられている。また、矢板の先端部にも矢板輪環6が溶接により取り付けられている。この上下の輪環5、6に輪環棒7が矢板の揺動を阻害しないように橋渡しされるようにして取り付けられている。石突8と連結された主軸突起パイプはセメントミルクの10注入口となっており、石突8の側面には円周方向に沿って数カ所に11の排出口が設けられている。また、石突の側面には石突蝶番12が溶接により取り付けられていると共に、矢板の先端部裏側にも矢板裏蝶番13が溶接により取り付けられており、石突蝶番12と矢板裏蝶番13との間を支持板14で矢板の揺動を阻害しないように連結することにより矢板4の補強を行なっている。15は吊り金具である。
【0020】
図2に示すように、パラシュート式アンカーは、矢板を折り畳んで棒状に形成されている。ここで、図3は矢板4と矢板4の間の土圧ヨロイ板16が折り畳みから開放された状態を示している。また、図4は支持板14と支持板14の間の下部土圧ヨロイ板17が折り畳みから開放された状態を示している。図5はネジ山付き主柱鋼管1のネジ山に、上端に形成された角頭19と圧入棒20を備えた太ネジ圧入開放装置18を装着した状態を示している。図6はネジ山付き主柱鋼管1に油圧ジャッキ圧入開放装置21を装着した状態を示している。図7は基礎構築安定板22が示されており、ネジ山付き主柱鋼管1のネジ部に基礎構築安定板22を固定することにより構築物の土台として使用するものである。
【0021】
【発明の効果】
本発明に係るパラシュート式アンカー及びそれを用いた基礎構築方法によりれば、浅い地下に小さな穴を垂直に開けて棒形状のパラシュート式アンカーを敷設し、その後、専用の圧入開放装置でアンカーとなる複数枚の矢板土圧ヨロイ板16及び下部土圧ヨロイ板17が地下で広く大きく開いてパラシュートアンカーの基礎構築が完成されるように構成されているので、以下に記載するような効果を奏する。すなわち、公害となる振動・騒音もなく残土も少ない。また、最後にセメントミルク等の圧入によりパラシュート式アンカーを補強するので頑丈で堅牢な基礎を構築することが可能となる。さらに、本発明に係るパラシュート式アンカー及びそれを用いた基礎構築方法によりれば、パラシュート式アンカーで軟弱地盤の内部において土圧密度・摩擦抵抗を最大限に受けることで、あらゆる構造体の自重に耐え、凍結深度、不等沈下、地震に強く、敷設本数は少なく、工期短縮、作業動員削減、経費削減が可能な基礎の構築を行なうことができるという効果がある。
【図面の簡単な説明】
【図1】 本発明に係るパラシュート式アンカーの一実施例の組立完成側面図である。
【図2】 図1のパラシュート式アンカーの断面図である。
【図3】 図1のパラシュート式アンカーの開放平面図である。
【図4】 図1のパラシュート式アンカーの開放裏面図である。
【図5】 太ネジ圧入開放装置の断面図である。
【図6】 油圧ジャッキ圧入開放装置である。
【図7】 基礎構築安定板の斜図である。
【符号の説明】
1 ネジ山付き主柱鋼管
2 スライド鋼管
3 矢板蝶番受台
4 矢板
5 輪環
6 矢板輪環
7 輪環棒
8 石突
9 主軸突起パイプ
10 注入口
11 排出口
12 石突蝶番
13 矢板裏蝶番
14 支持板
15 吊り金具
16 土圧ヨロイ板
17 下部土圧ヨロイ板
18 太ネジ圧入開放装置
19 角頭
20 圧入棒
21 油圧ジャッキ圧入開放装置
22 基礎構築安定板
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a parachute anchor and a foundation construction method using the parachute anchor, and more particularly to a parachute anchor widely opened in a laid soil and a foundation construction method using the same.
[0002]
[Prior art]
The plains in Japan are soiled corrosive soil layers that contain a lot of moisture, such as soft soil peculiar to soft soils, wetlands, peat layers, clay layers, silt layers, Kanto loam layers, etc. Is distributed. Buildings on soft ground, the foundation work of construction, construction work, etc., which are on an expanding trend, are the most difficult constructions. In civil engineering construction work for soft ground, there are the following methods. First of all, soil quality, soil improvement, surface layer improvement, etc. However, in order to make a foundation such as a solid foundation, a large amount of muddy water and residual soil must be treated. In recent years, industrial waste problems and environmental problems have occurred. In addition, although it is a foundation construction method such as foundation support piles, this impact construction method causes environmental problems such as noise and vibration, so it cannot be adopted in urban areas and suburbs. In addition, even if all civil engineering foundation construction technologies are used in this way, new houses built on soft ground will crack over the walls due to unequal subsidence, etc. over the years, and sashes such as windows. The number of defective houses continues to increase due to gaps in the doors and the inconvenience of opening and closing the fittings.
[0003]
[Problems to be solved by the invention]
In the past, the foundation work of buildings and structures on soft ground is carried out by a wide variety of construction methods, using civil engineering techniques against the special soil quality of soft ground. In general, many sites employ striking piles such as concrete piles that are placed in large quantities. Over time, the pile piles may not be stable or swing, and the pile may sink due to its own weight.
[0004]
Therefore, the present invention is intended to provide a parachute anchor for realizing a foundation with high comfortability, which can improve the conventional drawbacks and disadvantages, and can be safe and secure, and a foundation construction method using the same. is there.
In addition, there is little remaining soil, no contact with industrial waste, environmental problems, no pollution such as noise and vibration during construction, and stable loading force due to shortened construction period is not inferior to the loading force of any previous foundation It is intended to provide a parachute anchor and a foundation construction method using the same. Specifically, the anchor assembled to a single rod-like laid in the ground, corresponding to the special soil of soft ground by opening as widely large parachute in the ground, rugged and robust made of steel It is intended to provide a simple parachute anchor and a foundation construction method using the same .
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention as set forth in claim 1 is characterized in that a slide steel pipe is provided inside a threaded main column steel pipe having a thread on the upper end side, and the end projects from the tip of the threaded main column steel pipe. The sheet pile hinge pedestal is fixed to the end of the projecting slide steel pipe, and the upper end of the main shaft projection pipe fixed to the stone bump is positioned in the slide steel pipe. A plurality of sheet piles with sharp edges at the periphery are mounted so as to be able to swing radially, and the threaded main column steel pipe and the surface of the sheet pile are connected with a ring rod so as not to disturb the sheet pile swing and The back of the sheet pile is connected with a support plate so as not to disturb the swing of the sheet pile, and the sheet pile is laid in the soil in a rod-like state by folding the sheet pile, and the sheet pile is circulated by pushing the slide steel pipe Although supported by the rod and the support plate Providing parachute anchor, characterized in that it is to be driven into soil open radially by swing fulcrum attachment portion of the sheet pile hinge pedestal.
[0006]
In order to achieve the above object, the present invention according to claim 2 is a parachute anchor according to claim 1, wherein the parachute anchor is foldable between a plurality of sheet piles radially attached around a hinge base. At the same time, attach a folding lower earth pressure plate, between the support plate and the support plate, and fold the earth pressure plate and the lower earth pressure plate in a rod shape when in use. When the sheet pile is laid in the soil and the sheet pile is opened, the earth pressure plate and the lower earth plate are opened accordingly.
[0007]
In order to achieve the above object, the present invention according to claim 3 is the parachute anchor according to claim 1 or 2, wherein a plurality of drains for discharging cement milk injected through the main shaft projection pipe around the stone bumps are provided. It is characterized in that it is configured to be able to perform cement work by providing an outlet and discharging cement milk injected from the main shaft projection pipe through a plurality of discharge ports.
[0008]
In order to achieve the above object, the present invention according to claim 4 is the parachute anchor according to any one of claims 1 to 3, wherein the attachment position of the ring rod to the surface of the sheet pile and the support plate It is characterized in that the earth pressure applied when the sheet pile is opened is dispersed by setting the attachment position to the back face of the sheet pile near the tip of the sheet pile.
[0009]
In order to achieve the above object, the present invention according to claim 5 digs a vertical hole for laying the parachute anchor in the foundation construction method using the parachute anchor according to any one of claims 1 to 4. The process of laying a parachute-type anchor in the form of a rod in the vertical hole while leaving a part of the threaded main column steel pipe on the ground, and pushing the slide steel pipe quietly and strongly by applying rotation to the square head part A thick screw press-release device with a press-fit rod is attached to the thread of the main column steel pipe with a thread, and the slide steel pipe is pushed with the press-fit rod by giving rotation to the square head part, thereby opening a plurality of sheet piles. And a step of opening the lower earth pressure alloy plate folded between the support plate and the support plate.
[0010]
In order to achieve the above object, according to a sixth aspect of the present invention, in the foundation construction method using the parachute type anchor according to the fifth aspect, the thick screw press-releasing device is a hydraulic jack in which the press-fitting rod is moved by hydraulic pressure. The press-fitting release device is characterized in that the press-fitting rod is pushed down by hydraulic pressure, and thereby the slide steel pipe is pushed in gently and strongly.
[0011]
In order to achieve the above object, the present invention according to claim 7 is the method for constructing a foundation using the parachute anchor according to claim 5 or 6, wherein the sheet pile of the parachute anchor laid in the soil is opened. , Remove the thick screw press-fitting release device or hydraulic jack press-release device, press the cement milk from the upper part of the threaded main column steel pipe, and discharge it from the discharge provided around the stone bump through the spindle projection pipe. It is characterized by solidifying with.
[0012]
In order to achieve the above object, the present invention described in claim 8 provides a foundation construction method using the parachute anchor according to any one of claims 5 to 7, further comprising a threaded main column steel pipe. The method further comprises a step of fixing a foundation construction stabilizing plate used as a foundation of the structure.
[0013]
In the parachute anchor of the present invention and the foundation construction method using the parachute anchor , the parachute anchor before laying underground has a shape assembled in a single rod shape, and when it is widened, it is thick and made of steel. A plurality of wide sheet piles are provided radially. A foldable earth pressure armor plate is attached between the sheet piles. Further, the sheet pile is reinforced with a support plate from the back side , and a lower earth pressure alloy plate similar to the sheet pile is mounted on the support plate . This earth pressure plate and lower earth plate remove the space between the sheet piles and the sheet piles, and make the maximum use of the earth pressure density and friction resistance in soft soil with a lot of moisture. In this way, a foundation that can withstand the weight of the structure is constructed .
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a parachute anchor according to the present invention and a foundation construction method using the same will be described with reference to the drawings. FIG. 1 is an assembled side view of an embodiment of a parachute anchor according to the present invention.
[0015]
In the illustrated parachute anchor, a slide steel pipe 2 of different thickness is inserted into a threaded main column steel pipe 1 , and a plurality of sheet piles are arranged around the circumference of a sheet pile hinge receiving base 3 fixed to the slide steel pipe 2. 4 is mounted so as to be swingable radially with an attachment portion with the sheet pile hinge cradle 3 as a fulcrum . Also, a support plate 14 that reinforces each sheet pile 4 from the back side is attached so as not to disturb the swing of the sheet pile , and one of the support plates 14 on the opposite side is connected to the main shaft projection pipe 9 . It is attached to the circumferential part of the stone bump 8 in a radial manner. Between the sheet pile 4 and the sheet pile 4, an earth pressure alloy plate 16 foldable by a hinge is attached, and a lower earth pressure alloy plate 17 is similarly provided between the support plate 14 and the support plate 14. . It is preferable that the tip of the sheet pile 4 has an acute shape that is easy to pierce the soil, and the steel material constituting the parachute anchor uses a treatment resistant to rust or the like.
[0016]
The same number of ring rings 5 as the sheet piles 4 are welded to the circumference of the end of the threaded main column steel pipe 1 . A sheet pile ring 6 is also welded to a place near the tip of the sheet pile 4, and a ring rod 7 is bridged between the ring rings 5 and 6 so as not to disturb the swing of the sheet pile .
[0017]
Next, the threads of either the thick screw press-fitting release device 18 or the hydraulic jack press-fitting release device 21 are engaged with each other and attached to the threaded main column steel pipe 1. After the gradually added a strong weight to slide the steel pipe 2 by press-fitting rod 20, and at the same time slide the steel pipe 2 is Ru because started rising is below, a plurality of sheet piles 4 and earth pressure armor plate 16 is opened radially beginning to The At that time, the strong earth pressure applied when the sheet pile 4 is opened is dispersed by the ring rod 7 bridged between the end of the threaded main column steel pipe 1 and the sheet pile 4 . Along with the opening of the sheet pile 4 , the lower earth pressure armor plate 17 between the earth pressure armor plate 16 and the support plate 14 that have been folded spreads. At the same time, when the main shaft projection pipe 9 has been inserted into the slide steel pipe 2 , the stability of the entire steel pipe increases. Also, wide large foundation after construction to open the parachute anchor, thick screw press-opening device 18 is attached to the threaded main pillar steel pipe 1, or remove the hydraulic jacks press-opening device 21, cement from the threaded main pole steel pipe 1 Press in milk . The cement milk to be press-fitted passes through the injection port of the main shaft projection pipe 9 and is discharged from the discharge port 11 provided on the circumference of the stone projection 8 . As a result, the parachute anchor can be hardened with concrete, and a sturdy and solid foundation can be constructed. Moreover , after the press-fitting construction of cement is completed, the foundation construction stabilizing plate 22 is attached to the threaded main column steel pipe 1 to be used as the foundation of the structure . Thus, parachute anchor was laid in the basement of soft ground widely increased the open sheet pile 4 forms the supporting ground, by receiving the largest earth pressure frictional resistance, withstand any product loads, a stable foundation, etc. It is possible to provide a parachute anchor and a foundation construction method using the parachute anchor that have the habit of living and are resistant to earthquakes .
[0018]
Next, the foundation construction method using the parachute anchor according to the present invention will be described while explaining the operation of the parachute anchor according to the present invention. The parachute anchor according to the present invention includes a plurality of sheet piles 4, an earth pressure armor plate 16 disposed between the sheet piles 4 and 4 , and a lower earth pressure armor plate disposed between the support plate 14 and the support plate 14. Are each folded in a hinge and formed into a rod shape, and this rod-like parachute anchor is laid in a vertical hole dug in advance vertically . Then, attaching one of the screws in the threaded main pillar steel pipe 1 of the thread diameter screw press-opening device 18 or hydraulic jacks press-opening device 21, press-rod upper slide steel pipe 2 in the threaded primary post steel pipe 1 When the pressure is increased at 20 , the sheet pile hinge pedestal 3 fixed to the slide steel pipe 2 is pushed down, and the sheet pile 4 and the mechanism accompanying it are softly and quietly and firmly attached to the plurality of sheet piles 4 . Begin to open outward. By interposing the HanawaTamaki rod 7 between the threaded primary posts steel pipe 1 and the sheet pile 4 to distribute powerful earth pressure according to the sheet pile 4, also it has been folded between the sheet piles 4 and sheet pile 4 soil pressure armor plate 16 is opened, it is open also lower soil pressure armor plate 17 which has been folded between the same support plate 14 and the support plate 14, finally Ru is widely opened a large parachute-like anchor. Then, after removing the threaded primary posts attached to the steel pipe 1 diameter screw press-opening device 18 or hydraulic jacks press-opening device 21, press-fitting the cement milk through the main shaft protruding pipe 9 from the threaded main pole steel pipe 1 The cement milk is discharged from a plurality of discharge ports 11 formed around the stone bump 8 and hardened with cement . An anchor portion of the laid underground by solidifying the cement, it is possible to build a robust foundation rugged. In addition , this foundation construction method using a parachute anchor is characterized in that no noise or vibration, which is regarded as pollution by conventional construction methods , is produced.
[0019]
【Example】
Next, an embodiment of a parachute anchor according to the present invention and a foundation construction method using the same will be described with reference to the drawings. FIG. 1 is an assembled side view of an embodiment of a parachute anchor according to the present invention. A slide steel pipe 2 having a different thickness is inserted into the threaded main column steel pipe 1 shown in the figure . A sheet pile hinge base 3 is fixed to the end of the slide steel pipe 2 . A plurality of sheet piles 4 about the sheet pile hinge cradle 3 Ru Tei is mounted radially. The height of the sheet pile 4 is a chevron shape, and a wide and thick steel material is used . The tip of the sheet pile 4 has an acute angle so that it can be easily stuck in the soil. The same number of ring rings 5 as the sheet piles 4 are attached to the ends of the threaded main column steel pipe 1 by welding. A sheet pile ring 6 is also attached to the tip of the sheet pile 4 by welding. An annular rod 7 is attached to the upper and lower annular rings 5 and 6 so as to be bridged so as not to disturb the swing of the sheet pile . Spindle projecting pipe 9 connected with the ferrule 8 has a 10 inlet cement milk, the side of the ferrule 8 11 outlet in several places along the circumferential direction are eclipsed set. A stone bump hinge 12 is attached to the side surface of the stone bump 8 by welding, and a sheet pile hinge 13 is also attached to the back side of the tip of the sheet pile 4 by welding, so that the stone bump hinge 12 and the sheet pile hinge 13 are The sheet pile 4 is reinforced by connecting the gaps with the support plate 14 so as not to disturb the swing of the sheet pile . Reference numeral 15 denotes a hanging metal fitting.
[0020]
As shown in FIG. 2, the parachute anchor is formed in a rod shape by folding the sheet pile 4 . Here, FIG. 3 shows a state in which the earth pressure armor plate 16 between the sheet pile 4 and the sheet pile 4 is released from folding . FIG. 4 shows a state in which the lower earth pressure end plate 17 between the support plate 14 and the support plate 14 is released from folding. FIG. 5 shows a state in which a thick screw press-fitting release device 18 having a square head 19 and a press-fitting rod 20 formed at the upper end is mounted on the screw thread of the main pillar steel pipe 1 with a screw thread. FIG. 6 shows a state in which a hydraulic jack press-fitting release device 21 is attached to the threaded main column steel pipe 1. FIG. 7 shows a foundation construction stabilizing plate 22, which is used as a foundation of a structure by fixing the foundation construction stabilizing plate 22 to a threaded portion of a threaded main column steel pipe 1.
[0021]
【The invention's effect】
According to the parachute anchor and the foundation construction method using the parachute anchor according to the present invention, a small hole is vertically drilled in a shallow basement, and a bar-shaped parachute anchor is laid, and then the anchor is formed by a dedicated press-fitting and releasing device. since basic construction of parachute anchor plurality of sheet piles 4 and earth pressure armor plate 16 and the lower earth pressure armor plate 17 is have wide large open underground is configured to complete, effects as described below Play. In other words , there is no pollution, no noise , and little residual soil . In addition , since the parachute anchor is reinforced by press-fitting cement milk or the like, it is possible to construct a strong and robust foundation. Furthermore, according to the parachute anchor and the foundation construction method using the parachute anchor according to the present invention, the parachute anchor receives the maximum earth pressure density and frictional resistance inside the soft ground, thereby reducing the weight of any structure. It has the effect of being able to build a foundation capable of enduring, freezing depth, unequal subsidence, earthquake resistance, few installations, shortening the work period, reducing work mobilization, and reducing costs .
[Brief description of the drawings]
FIG. 1 is an assembled side view of an embodiment of a parachute anchor according to the present invention.
FIG. 2 is a cross-sectional view of the parachute anchor of FIG.
3 is an open plan view of the parachute anchor of FIG . 1. FIG.
4 is an open back view of the parachute anchor of FIG . 1. FIG.
FIG. 5 is a cross-sectional view of a thick screw press-fitting release device.
FIG. 6 is a hydraulic jack press-fitting release device.
7 is a perspective view of basic construction stabilizer.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Threaded main pillar steel pipe 2 Slide steel pipe 3 Sheet pile hinge base 4 Sheet pile 5 Ring 6 Sheet pile ring 7 Ring ring 8 Stone bump 9 Spindle projection pipe 10 Inlet 11 Discharge port 12 Stone bump hinge 13 Back plate hinge 14 Support plate 15 Suspension metal fitting 16 Earth pressure plate 17 Lower earth pressure plate 18 Thick screw press release device 19 Square head 20 Press rod 21 Hydraulic jack press release device 22 Foundation construction stabilization plate

Claims (8)

上端側にネジ山が設けられたネジ山付き主柱鋼管内部にスライド鋼管をその末端が前記ネジ山付き主柱鋼管の先端から突出するように配置し、突出した前記スライド鋼管の末端に矢板蝶番受台を固定し、そして、石突に固定した主軸突起パイプの上端を前記スライド鋼管内に位置するように配置すると共に、前記矢板蝶番受台の周囲に先端が鋭角とされた複数枚の矢板を放射状に揺動可能に装着し、前記ネジ山付き主柱鋼管と前記矢板の表面を当該矢板の揺動を阻害しないように輪環棒で連結すると共に前記石突と矢板の裏面を当該矢板の揺動を阻害しないように支持板で連結して構成され、前記矢板を折り畳んで棒状とした状態で土中に敷設し、そして、前記スライド鋼管を押し込むことにより前記矢板が前記輪環棒と前記支持板に支持されながら前記矢板蝶番受台との取り付け部を支点として揺動することにより放射状に開いて土中に打ち込まれるようにされたことを特徴とするパラシュート式アンカー。A slide steel pipe is arranged inside a threaded main column steel pipe with a thread on the upper end side so that its end protrudes from the tip of the threaded main column steel pipe, and a sheet pile hinge is placed at the end of the protruding slide steel pipe The pedestal is fixed, and the upper ends of the main shaft projection pipes fixed to the stone bumps are arranged so as to be positioned in the slide steel pipe, and a plurality of sheet piles having sharp edges at the periphery of the sheet pile hinge pedestal are provided. It is mounted so that it can be swung radially, and the threaded main column steel pipe and the surface of the sheet pile are connected with a ring rod so as not to disturb the rocking of the sheet pile, and the back of the sheet pile and the sheet pile is swung. It is constructed by connecting with a support plate so as not to hinder the movement, and is laid in the soil in a state where the sheet pile is folded into a rod shape, and then the sheet pile is pushed into the slide steel pipe so that the sheet pile is supported with the ring rod Supported by the plate Parachute anchor, characterized in that it is to be driven into soil open radially by swinging the mounting portion with the sheet pile hinge receiving base as a fulcrum while. 請求項1に記載のパラシュート式アンカーにおいて、The parachute anchor according to claim 1,
前記蝶番受台を中心に放射状に装着した複数枚の矢板と矢板との間に折り畳み式の土圧ヨロイ板を取り付けると共に、前記支持板と支持板との間にも折り畳み式の下部土圧ヨロイ板を取り付け、使用時には前記土圧ヨロイ板及び下部土圧ヨロイ板を折り畳んで棒状とした状態で土中へ敷設し、前記矢板が開いたときにはそれに伴って前記土圧ヨロイ板及び下部土圧ヨロイ板が開くようにしたことを特徴とするパラシュート式アンカー。  A foldable earth pressure armor plate is attached between a plurality of sheet piles radially mounted around the hinge cradle, and a foldable lower earth pressure armor also between the support plate and the support plate. At the time of use, the earth pressure plate and the lower earth pressure plate are folded in a rod shape and laid in the soil, and when the sheet pile is opened, the earth pressure plate and the lower earth pressure plate are A parachute anchor characterized in that the plate opens.
請求項1又は2に記載のパラシュート式アンカーにおいて、In the parachute type anchor according to claim 1 or 2,
前記石突の周囲に前記主軸突起パイプを介して注入したセメントミルクを排出する複数の排出口を設け、前記主軸突起パイプから注入されたセメントミルクを前記複数の排出口から排出することによりセメント施工可能に構成されたことを特徴とするパラシュート式アンカー。  A plurality of discharge ports for discharging cement milk injected through the main shaft projection pipe are provided around the stone protrusion, and cement construction is possible by discharging the cement milk injected from the main shaft protrusion pipe from the plurality of discharge ports. A parachute anchor characterized by being configured as described above.
請求項1から3のいずれか1項に記載のパラシュート式アンカーにおいて、The parachute anchor according to any one of claims 1 to 3,
前記輪環棒の矢板の表面への取り付け位置及び前記支持板の矢板裏面への取り付け位置を当該矢板の先端近傍とすることにより矢板の開放時にかかる土圧力を分散するようにしたことを特徴とするパラシュート式アンカー。  The earth pressure applied when the sheet pile is opened is dispersed by setting the attachment position of the ring rod to the surface of the sheet pile and the attachment position of the support plate to the back face of the sheet pile near the tip of the sheet pile. Parachute-type anchor.
請求項1から4のいずれか1項に記載のパラシュート式アンカーを用いた基礎構築方法において、In the foundation construction method using the parachute type anchor according to any one of claims 1 to 4,
前記パラシュート式アンカーを敷設する縦穴を掘り、当該縦穴に棒状とされた前記パラシュート式アンカーを前記ネジ山付き主柱鋼管の一部を地上に残した状態で敷設する工程と、  Digging a vertical hole for laying the parachute anchor, and laying the parachute anchor in the vertical hole in a state of leaving a part of the threaded main column steel pipe on the ground; and
角頭部分に回転を与えることにより前記スライド鋼管を静かにかつ強力に押し込む圧入棒を備えた太ネジ圧入開放装置を前記ネジ山付き主柱鋼管のネジ山に取り付け、前記角頭部分に回転を与えることにより前記圧入棒で前記スライド鋼管を押し込み、それによって複数の前記矢板を開くと共に、矢板と矢板との間に折り畳まれていた土圧ヨロイ板及び支持板と支持板との間に折り畳まれていた下部土圧ヨロイ板を開く工程と、  A thick screw press-release device with a press-fit rod that pushes the slide steel pipe gently and strongly by applying rotation to the square head part is attached to the thread of the threaded main column steel pipe, and the square head part is rotated. By pushing the slide steel pipe with the press-fitting rod, a plurality of the sheet piles are opened, and the earth pressure alloy plate and the support plate and the support plate folded between the sheet pile and the sheet pile are folded. The process of opening the lower earth pressure yoroi plate,
を含み構成されてなるパラシュート式アンカーを用いた基礎構築方法。  The foundation construction method using the parachute type | formula anchor comprised including.
請求項5に記載のパラシュート式アンカーを用いた基礎構築方法において、In the foundation construction method using the parachute anchor according to claim 5,
前記太ネジ圧入開放装置が、油圧によって前記圧入棒を可動させる油圧ジャッキ圧入開放装置であり、油圧によって前記圧入棒を押し下げ、それによって前記スライド鋼管を静かにかつ強力に押し込むようにしたことを特徴とするパラシュート式アンカーを用いた基礎構築方法。  The thick screw press-fitting release device is a hydraulic jack press-fitting release device that moves the press-fitting rod by hydraulic pressure, and presses down the press-fitting rod by hydraulic pressure, thereby pushing the slide steel pipe quietly and strongly. A foundation construction method using parachute anchors.
請求項5又は6に記載のパラシュート式アンカーを用いた基礎構築方法において、In the foundation construction method using the parachute anchor according to claim 5 or 6,
土中に敷設したパラシュート式アンカーの前記矢板を開放した後、前記太ネジ圧入開放装置又は油圧ジャッキ圧入開放装置を外し、前記ネジ山付き主柱鋼管の上部からセメントミルクを圧入し、主軸突起パイプを介して前記石突の周囲に設けた前記排出より排出させることによりさらにコンクリートで固めることを特徴とするパラシュート式アンカーを用いた基礎構築方法。  After releasing the sheet pile of the parachute anchor laid in the soil, remove the thick screw press-fitting release device or hydraulic jack press-fitting release device, press the cement milk from the upper part of the threaded main column steel pipe, The foundation construction method using the parachute type anchor characterized by further solidifying with concrete by making it discharge from the said discharge | emission provided in the circumference | surroundings of the said stone protrusion through.
請求項5から7のいずれか1項に記載のパラシュート式アンカーを用いた基礎構築方法において、In the foundation construction method using the parachute type anchor according to any one of claims 5 to 7,
さらに、前記ネジ山付き主柱鋼管に構築物の土台として利用する基礎構築安定板を固定する工程をさらに備えてなることを特徴とするパラシュート式アンカーを用いた基礎構築方法。  Furthermore, the foundation construction method using the parachute type | formula characterized by further including the process of fixing the foundation construction stabilizer used as a foundation of a structure to the said main pillar steel pipe with a thread.
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