JP2004316397A - Ground improvement method and ground improvement device - Google Patents

Ground improvement method and ground improvement device Download PDF

Info

Publication number
JP2004316397A
JP2004316397A JP2003147011A JP2003147011A JP2004316397A JP 2004316397 A JP2004316397 A JP 2004316397A JP 2003147011 A JP2003147011 A JP 2003147011A JP 2003147011 A JP2003147011 A JP 2003147011A JP 2004316397 A JP2004316397 A JP 2004316397A
Authority
JP
Japan
Prior art keywords
wall
predetermined
original ground
pressure jet
ground
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003147011A
Other languages
Japanese (ja)
Inventor
Shiro Nakajima
志朗 中嶋
Hiroko Matsumoto
浩子 松本
Takuya Matsumoto
卓也 松本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEWTECH KENKYUSHA KK
Original Assignee
NEWTECH KENKYUSHA KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEWTECH KENKYUSHA KK filed Critical NEWTECH KENKYUSHA KK
Priority to JP2003147011A priority Critical patent/JP2004316397A/en
Publication of JP2004316397A publication Critical patent/JP2004316397A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method for efficiently creating an arbitrary polygonal or polygonal continuous wall improvement area in a plane in a ground improvement method using a water high pressure jet liquid containing a hardener liquid or a hardener. <P>SOLUTION: The ground improvement method inserts a rod 1 having a plurality of nozzles 3 arranged toward a prescribed direction on the edge part into an object ground 5, and operates and manages a flying distance and a direction of the high pressure jet liquid jetted from each nozzle by performing constant position stop and/or arbitrary angle rotation and/or pulling and inserting while simultaneously jetting the water high pressure jet liquid containing the hardener liquid or the hardener of prescribed pressure from prescribed diameter nozzles of a plurality of prescribed parts. Thereby the trace of the high pressure jet liquid of a previously created original ground wall improved body 10 is not obstructed at a jet position of an original ground wall improved body created hereafter, and the trace of the high pressure jet liquid of the original ground wall improved body 10 created before and after forms a focus point and/or joins or intersects to create the original ground wall improved body 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、軟弱地盤の安定、地山支保、トンネル支保工、構築物の基礎、構築物の基礎補強、液状化防止、遮水用地中壁、地下水湧水防止などを目的として用いられる硬化剤液または硬化剤を含む水の高圧ジェット液を用いた地盤改良工法と地盤改良装置に関するものである。
【0002】
【従来の技術】
硬化剤液または硬化剤を含む水の高圧ジェット液を用いた従来の技術は、一本のロッドの一箇所乃至は二箇所から硬化剤を含む水の高圧ジェット液を常時同一の圧力、ノズル径及び流量で回転しながら噴射するだけであった。このため、改良体の個々の形状は、平面視で円形又は半円形又は扇形に限られており、壁状の改良域を造成するにも、径の小さい円形又は半円形又は扇形の造成体を多数重複連接造成する方法しかなく、非常に不経済で、仕様の面からも困難であった。そこで、本出願人は特許第1946033号で四角状改良体の造成工法を開発し、環境への影響低減、コスト低下等の効果が見込まれる壁状・四角状の改良体の造成が可能となり、さらに格子状の壁状改良域の造成については経済的に行えるようになったものの、硬化剤液または硬化剤を含む水の高圧ジェット液を用いて六角形や三角形、平行四辺形など任意の平面が多角形状の壁状改良域を造成する方法、および更にこれら壁状改良域を利用して在来土をブロック状に封じ込めることにより重力ブロック或いは耐圧ブロックとしての利用をはかる技術はなく、困難であった。
【0003】
【特許文献1】
特公平06−080247号公報
【0004】
【発明が解決しようとする課題】
正三角形や正六角形の連続した壁状域は、周囲からの力に対する応力体として非常に優れている。例えば正六角形連続状壁状域(ハニカム状)は、現在航空機や工業製品の中で広く活用されている。利点としては中空でありながら高い強度が得られるため、軽量化が図れ、さらに原材料の低減にもつながる点などがある。この考えは地盤の中でも有効であり、省資源、自然保護の上からもさらに有効なものと考えられるが、硬化剤液または硬化剤を含む水の高圧ジェット液を用いた従来の技術による円形又は半円形又は扇形の改良体では、さらには本出願人の特許第1946033号の四角状改良体の造成によっても、格子状以外の、六角形や三角形、平行四辺形など任意形状の平面が多角形状の壁状改良域を造成するには、仕様面での不具合、さらにはコストと材料の面で無駄が多く非常に困難であった。そのため、対象地盤を開削することなく対象地盤中を改良できる硬化剤液または硬化剤を含む水の高圧ジェット液を用いた地盤改良工法においても、任意の平面が多角形の壁状改良域または平面が多角形連続状の壁状改良域を効率よく造成できる工法が待ち望まれており、さらに、多角形の壁状改良域または平面が多角形連続状の壁状改良域を重力ブロックあるいは耐圧ブロックとして利用をはかる技術も、在来土を活かす環境に優しい技術という面からも、待ち望まれている。
【0005】
【課題を解決するための手段】
そこで、本発明は、上記の事情に鑑み、新しい地盤改良工法として、平面が多角形の壁状改良域または平面が多角形連続状の壁状改良域を造成すべく、先端部に所定方向に向かって配置された複数個のノズルを有するロッドを対象地盤に挿入し、複数個のノズルのうち所定複数箇所の所定径のノズルより所定圧力の硬化剤液または硬化剤を含む水の高圧ジェット液を同時に噴射しながら定位置停止および/または任意角度回転および/または引き抜くか挿入することで、各ノズルより噴射される該高圧ジェット液の飛距離と方向を操作管理して所定の位置に所定の形状の原地盤壁状改良体を造成する工法にあって、先に造成した原地盤壁状改良体の高圧ジェット液の軌跡が以後造成する原地盤壁状改良体の噴射位置に支障となることなく、前後に造成する原地盤壁状改良体の高圧ジェット液の軌跡が焦点を結ぶかおよび/または接合或いは交叉させて複数の原地盤壁状改良体を造成することで、平面が多角形の壁状改良域または平面が多角形連続状の壁状改良域を造成することを特徴とする地盤改良工法とした。
【0006】
また、本発明は、先端部に所定方向に向かって配置された複数個のノズルを有するロッドを対象地盤に挿入し、複数個のノズルのうち所定複数箇所の所定径のノズルより所定圧力の硬化剤液または硬化剤を含む水の高圧ジェット液を同時に噴射しながら定位置停止および/または任意角度回転および/または引き抜くか挿入することで、各ノズルより噴射される該高圧ジェット液の飛距離と方向を操作管理して所定の位置に所定の形状の原地盤壁状改良体を造成する工法にあって、先に造成した原地盤壁状改良体の高圧ジェット液の軌跡が以後造成する原地盤壁状改良体の噴射位置に支障となることなく、前後に造成する原地盤壁状改良体の高圧ジェット液の軌跡が焦点を結ぶかおよび/または接合或いは交叉させて複数の原地盤壁状改良体を造成し、さらに原地盤壁状改良体の所定箇所において原地盤壁状改良体と直交する水平板状隔壁を一体造成することで、所定箇所の原地盤に隔壁を設けた平面が多角形の壁状改良域または所定箇所の原地盤に隔壁を設けた平面が多角形連続状の壁状改良域を造成することを特徴とする地盤改良工法とした。
【0007】
さらにまた、本発明は、先端部に所定方向に向かって配置された複数個のノズルを有するロッドを対象地盤に挿入し、複数個のノズルのうち所定複数箇所の所定径のノズルより所定圧力の硬化剤液または硬化剤を含む水の高圧ジェット液を同時に噴射しながら定位置停止および/または任意角度回転および/または引き抜くか挿入することで、各ノズルより噴射される該高圧ジェット液の飛距離と方向を操作管理して所定の位置に所定の形状の原地盤壁状改良体を造成する工法にあって、先に造成した原地盤壁状改良体の高圧ジェット液の軌跡が以後造成する原地盤壁状改良体の噴射位置に支障となることなく、前後に造成する原地盤壁状改良体の高圧ジェット液の軌跡が焦点を結ぶかおよび/または接合或いは交叉させて複数の原地盤壁状改良体を造成し、さらに原地盤壁状改良体の所定箇所において原地盤壁状改良体と直交する水平板状隔壁を一体造成することで、所定箇所の原地盤の周囲に隔壁を設けた重力ブロックもしくは耐圧ブロックとしての平面が多角形の壁状改良域または平面が多角形連続状の壁状改良域を造成することを特徴とする地盤改良工法とした。
【0008】
また、本発明は、ロッドを地中に挿入する手段と、ロッドの先端部の複数箇所のノズルより硬化剤液または硬化剤を含む水の高圧ジェット液を同時に噴射しながら定位置停止および/または任意角度回転および/または引き抜くか挿入する手段とよりなり、平面が多角形の壁状改良域または平面が多角形連続状の壁状改良域を造成する地盤改良装置とした。
【0009】
【発明の実施の態様】
本発明を、添付する図面に示す具体的な実施例に基づいて、以下詳細に説明する。
【0010】
本発明に用いるロッドの先端には、複数個のノズルを有している。またノズルは、ロッドに対して水平に設置することもあれば、垂直方向や斜め方向に設置することもある。ノズルの径・形状及び噴射方向及び噴射圧力はそれぞれ所定または任意に設定するため、同一ロッド上のノズルは、径と圧力はすべて同一である必要はなく、個別に設定できる。
【0011】
図1にノズル3を3個配したロッド1と図2にノズル3を4個配したロッド1を示した。ここでロッド1の断面形状は円形または角形いずれでもよく、ノズル3は同時に全てを使用してもよいし、任意箇所のみを使用してもよい。また、ノズル3は同一ロッド上で個別に径が設定できる。ロッド1の内部には1本乃至は数本の硬化剤通路が各ノズルにつながっており、硬化剤を含む水を200〜600kgf/cm程度の高圧ジェット液として地中に噴射する。なお、硬化剤を含む水単独のみの噴射の他、繊維状硬化材を含む水を単独で噴射したり、硬化剤を含む水または繊維状硬化材を含む水を圧縮空気と合わせて噴射することもある。またノズル3はロッド1の先端部に装着するロッド先端装着ブロック2に設けて、ロッド先端装着ブロック2を必要個数装着して使用してもよい。
【0012】
図3には径2.8mmのノズル3を3個を内角120°で均等に配置したロッド先端装着ブロック2を2ヶ先端に装着したロッド1の例を示した。ロッド1の内部には1本乃至は数本の硬化剤通路があり、ロッド先端装着ブロック2の各ノズル3につながっており、硬化剤を含む水を200〜600kgf/cm程度の高圧ジェット液として地中に噴射する。なお、硬化剤を含む水単独のみの噴射の他、繊維状硬化材を含む水を単独で噴射したり、硬化剤を含む水または繊維状硬化材を含む水を圧縮空気と合わせて噴射することもある。図3のロッド1を使用した場合、図4のような外側に向かって内角60°の均等な配置の硬化剤液または硬化剤を含む水の高圧ジェット液の軌跡4となる。
【0013】
図1で示したロッド1を使用して、六角形の壁状改良域11および六角形連続状の壁状改良域12を造成する方法について説明する。
【0014】
図5に示すように、対象地盤5にボーリングマシンあるいはアースオーガなどの適宜手段により、ロッド1を所定深度まで挿入する。
【0015】
続いて、ロッド1の硬化剤通路を経た高圧のセメントミルク等の硬化剤を含む水もしくは繊維状硬化材を含む高圧ジェット液をノズル3より噴射すると、図6のような高圧ジェット液の軌跡4ができる。この高圧ジェットの軌跡のノズルから先端部までの長さは、通常の砂質土地盤中で噴射圧力400kgf/cmで1秒間噴射した場合、ノズル径が1.8mmの場合で0.5mから1.5m程度、ノズル径が2.8mmの場合で1m〜2m程度、ノズル径が3.8mmの場合で2m〜4mとされているが、それに準じたものとなる。
【0016】
次に、ロッド1を1ステップ当たり2〜5cm程度上昇させながら、高圧ジェット液の噴射を行い、所定の高さまでロッド1を引き抜くと、図7のような原地盤壁状改良体10が造成できる。また、各ステップ位置で、ロッドを所定角度回転し、所定の高さまでロッド1を引き抜くと、図8のような原地盤壁状改良体10が造成できる。これは壁厚が必要となる場合有効である。
【0017】
図7の原地盤壁状改良体10に隣接する箇所に、先に造成した原地盤壁状改良体10の高圧ジェット液の軌跡4が以後造成する原地盤壁状改良体の噴射位置に支障となることなく、前後に造成する原地盤壁状改良体10の高圧ジェット液の軌跡4が焦点を結ぶかおよび/または接合或いは交叉させて複数の原地盤壁状改良体10を二本造成して、平面が六角形の壁状改良域11を造成した例を図9に示した。この平面が六角形の壁状改良域11の隣接する箇所に、同様に原地盤壁状改良体10を所定本数造成すると、図10のような六角形連続状の壁状改良域12が造成できる。
【0018】
また図2に示したロッド1を使用して原地盤壁状改良体10を所定本数造成した場合、図11のような平面が四角形連続状の壁状改良域13が造成できる。壁間距離を短くしたい場合は、図12のように原地盤壁状改良体10を任意に配置して平面が四角形連続状の壁状改良域13を造成することで対応できる。
【0019】
また図3に示したロッドを使用して、原地盤壁状改良体10を所定本数造成した場合、図13のような平面が平行四辺形連続状の壁状改良域14が造成できる。
【0020】
次に、図1と図3に示したロッドを使用して、平面が正三角形連続状の壁状改良域15を造成する方法を説明する。
【0021】
図1のロッドを用いて、図9、図10のような平面が六角形の壁状改良域11もしくは平面が六角形連続状の壁状改良域12を造成し、次に、図3のロッド1を図14のように平面が六角形の壁状改良域11もしくは平面が六角形連続状の壁状改良域12の中央部に挿入し、1ステップ当たり2〜5cm程度上昇させながら、高圧ジェット液の噴射を行い、所定の高さまでロッド1を引き抜くと、図15のような、平面が正三角形連続状の壁状改良域13が造成できる。このとき、先に造成した平面が六角形の壁状改良域11もしくは平面が六角形連続状の壁状改良域12の硬化状況に留意し、かつ各々の原地盤壁状改良体10の高圧ジェット液の軌跡4が以後造成する原地盤壁状改良体10の噴射位置に支障となることなく、前後に造成する原地盤壁状改良体10の高圧ジェット液の軌跡4が焦点を結ぶかおよび/または接合或いは交叉するように、施工の順番を決定する必要がある。
【0022】
図16では、図10の六角形連続状の壁状改良域12において、所定の箇所に水平板状隔壁16を一体造成することで、所定箇所の原地盤に隔壁を設けた平面が六角形連続状の壁状改良域12を造成した例を示す。この平面が六角形連続状の壁状改良域12は止水性を有している。ここでは、平面が六角形連続状の壁状改良域12における例を示したが、六角形に限らず、どの多角形においても水平板状隔壁16を所定の箇所に一体造成することができる。
【0023】
図17では、四角形連続状の壁状改良域13において、両端に水平板状隔壁16を一体造成することで、所定箇所の原地盤の周囲に隔壁を設けて重力ブロックもしくは耐圧ブロックとしての平面が四角形連続状の壁状改良域13を造成した例を示した。この重力ブロックもしくは耐圧ブロックは、内部に原地盤を包合して利用することを特徴としている。ここでは、平面が四角形連続状の壁状改良域13における例を示したが、四角形に限らず、どの多角形においても水平板状隔壁16を所定の箇所に一体造成して重力ブロックもしくは耐圧ブロックとして利用することができる。
【0024】
なお、本発明は、垂直方向に限らず、図18のように水平方向、また斜め方向にも利用することができる。さらには管理装置7を用いて、噴射圧力、噴射角度、噴射時間、噴射方向、引上げ速度、深度、造成角度、スラリー距離等を一元的に管理することもできる。
【0025】
【発明の効果】
本発明は、先端部に所定方向に向かって配置された複数個のノズルを有するロッドを対象地盤に挿入し、複数個のノズルのうち所定複数箇所の所定径のノズルより所定圧力の硬化剤液または硬化剤を含む水の高圧ジェット液を同時に噴射しながら定位置停止および/または任意角度回転および/または引き抜くか挿入することで、各ノズルより噴射される該高圧ジェット液の飛距離と方向を操作管理して所定の位置に所定の形状の原地盤壁状改良体を造成する工法にあって、先に造成した原地盤壁状改良体の高圧ジェット液の軌跡が以後造成する原地盤壁状改良体の噴射位置に支障となることなく、前後に造成する原地盤壁状改良体の高圧ジェット液の軌跡が焦点を結ぶかおよび/または接合或いは交叉させて複数の原地盤壁状改良体を造成することで、平面が多角形の壁状改良域または平面が多角形連続状の壁状改良域を造成することを特徴とする地盤改良工法であるので、新しい地盤改良技術として、平面が多角形の壁状改良域または平面が多角形連続状の壁状改良域を造成することができる。
【0026】
本発明は、具体的には、先端部に所定方向に向かって配置された複数個のノズルを有するロッドを対象地盤に挿入し、複数個のノズルのうち所定複数箇所の所定径のノズルより所定圧力の硬化剤液または硬化剤を含む水の高圧ジェット液を同時に噴射しながら定位置停止および/または任意角度回転および/または引き抜くか挿入することで、各ノズルより噴射される該高圧ジェット液の飛距離と方向を操作管理して所定の位置に所定の形状の原地盤壁状改良体を造成する工法にあって、先に造成した原地盤壁状改良体の高圧ジェット液の軌跡が以後造成する原地盤壁状改良体の噴射位置に支障となることなく、前後に造成する原地盤壁状改良体の高圧ジェット液の軌跡が焦点を結ぶかおよび/または接合或いは交叉させて複数の原地盤壁状改良体を造成し、さらに原地盤壁状改良体の所定箇所において原地盤壁状改良体と直交する水平板状隔壁を一体造成することで、所定箇所の原地盤に隔壁を設けた平面が多角形の壁状改良域または所定箇所の原地盤に隔壁を設けた平面が多角形連続状の壁状改良域を造成することを特徴とする地盤改良工法とした。
【0027】
本発明は、具体的には、先端部に所定方向に向かって配置された複数個のノズルを有するロッドを対象地盤に挿入し、複数個のノズルのうち所定複数箇所の所定径のノズルより所定圧力の硬化剤液または硬化剤を含む水の高圧ジェット液を同時に噴射しながら定位置停止および/または任意角度回転および/または引き抜くか挿入することで、各ノズルより噴射される該高圧ジェット液の飛距離と方向を操作管理して所定の位置に所定の形状の原地盤壁状改良体を造成する工法にあって、先に造成した原地盤壁状改良体の高圧ジェット液の軌跡が以後造成する原地盤壁状改良体の噴射位置に支障となることなく、前後に造成する原地盤壁状改良体の高圧ジェット液の軌跡が焦点を結ぶかおよび/または接合或いは交叉させて複数の原地盤壁状改良体を造成し、さらに原地盤壁状改良体の所定箇所において原地盤壁状改良体と直交する水平板状隔壁を一体造成することで、所定箇所の原地盤の周囲に隔壁を設けた重力ブロックもしくは耐圧ブロックとしての平面が多角形の壁状改良域または平面が多角形連続状の壁状改良域を造成することを特徴とする地盤改良工法とした。
【0028】
また、本発明は、対応した施工する手段を備えた地盤改良装置とすべく、ロッドを地中に挿入する手段と、ロッドの先端部の複数箇所のノズルより硬化剤液または硬化剤を含む水の高圧ジェット液を同時に噴射しながら定位置停止および/または任意角度回転および/または引き抜くか挿入する手段とよりなり、平面が所定多角形の壁状改良域または平面が所定多角形連続状の壁状改良域を造成する地盤改良装置とした。
【図面の簡単な説明】
【図1】本発明の実施例で、ノズルを3個配したロッドの斜視図である。
【図2】本発明の実施例で、ノズルを4個配したロッドの斜視図である。
【図3】本発明の実施例で、ノズルを3個配したロッド先端装着ブロックを2ヶ装着したロッドの斜視図である。
【図4】図3のロッドを使用した状態の平面図である。
【図5】本発明の造成マシンにより、ロッドを地盤に挿入した状態の正面図である。
【図6】図1のロッドを使用した状態の平面図である。
【図7】図1のロッドを使用して造成した原地盤壁状改良体の斜視図である。
【図8】図1のロッドを使用して造成した原地盤壁状改良体の斜視図である。
【図9】図1のロッドを使用して造成した平面が六角形の壁状改良域の平面図である。
【図10】図1のロッドを使用して造成した平面が六角形連続状の壁状改良域の平面図である。
【図11】図2のロッドを使用して造成した平面が四角形連続状の壁状改良域の平面図である。
【図12】図2のロッドを使用して造成した平面が四角形連続状の壁状改良域の平面図である。
【図13】図3のロッドを使用して造成した平面が平行四辺形連続状の壁状改良域の平面図である。
【図14】図3のロッドを所定地盤の所定箇所に挿入して使用した状態の斜視図である。
【図15】図1及び図3のロッドを使用して造成した平面が正三角形連続状の壁状改良域の平面図である
【図16】所定の箇所に水平板状隔壁を設けた平面が六角形連続状の壁状改良域の斜視図である。
【図17】所定の箇所に水平板状隔壁を設けて重力ブロックもしくは耐圧ブロックとした平面が四角形連続状の壁状改良域の断面図である。
【図18】本発明を水平方向に実施した状態の斜視図である。
【符号の説明】
1…ロッド
2…ロッド先端装着ブロック
3…ノズル
4…高圧ジェット液の軌跡
5…対象地盤
6…造成マシン
7…管理装置
10…原地盤壁状改良体
11…平面が六角形の壁状改良域
12…平面が六角形連続状の壁状改良域
13…平面が四角形連続状の壁状改良域
14…平面が平行四辺形連続状の壁状改良域
15…平面が正三角形連続状の壁状改良域
16…水平板状隔壁
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is a hardener liquid used for the purpose of stabilization of soft ground, ground support, tunnel support, foundation of a structure, reinforcement of a foundation of a structure, prevention of liquefaction, underground wall for impermeable, prevention of groundwater springing, etc. The present invention relates to a ground improvement method and a ground improvement device using a high-pressure jet liquid of water containing a curing agent.
[0002]
[Prior art]
The conventional technology using a hardener liquid or a high-pressure jet liquid of water containing a hardener is a technique in which a high-pressure jet liquid of water containing a hardener is constantly applied from one or two places of one rod to the same pressure and nozzle diameter. And only sprayed while rotating at the flow rate. For this reason, the individual shape of the improved body is limited to a circle, a semicircle, or a sector in a plan view. There was only a method of creating multiple overlapping connections, which was extremely uneconomical and difficult in terms of specifications. Therefore, the present applicant has developed a method for forming a square-shaped improved body in Patent No. 1946033, and it is possible to form a wall-shaped / square-shaped improved body that is expected to have an effect of reducing the effect on the environment and reducing costs, Furthermore, although the creation of a grid-like wall-shaped improvement area can be performed economically, any plane such as a hexagon, triangle, or parallelogram can be formed using a high-pressure jet liquid of a hardener or water containing a hardener. However, there is no technique for creating a polygonal wall-shaped improvement area, and there is no technique for using the wall-shaped improvement area to confine the conventional soil in a block shape to use it as a gravity block or a pressure-resistant block. there were.
[0003]
[Patent Document 1]
Japanese Patent Publication No. 06-080247
[Problems to be solved by the invention]
The continuous wall-like area of an equilateral triangle or an equilateral hexagon is very excellent as a stress body against a force from the surroundings. For example, a regular hexagonal continuous wall-like area (honeycomb-like area) is currently widely used in aircraft and industrial products. The advantage is that high strength can be obtained while being hollow, so that the weight can be reduced and the raw materials can be reduced. This idea is also effective in the ground and is considered to be even more effective from the viewpoint of resource saving and natural protection, but it is considered that the conventional technology using a high-pressure jet liquid of hardener liquid or water containing a hardener has In a semicircular or fan-shaped improved body, even by forming a square-shaped improved body of the applicant's Patent No. 1946033, any plane other than a lattice, such as a hexagon, a triangle, or a parallelogram, can be formed into a polygonal plane. In order to create a wall-shaped improvement area, it was very difficult to use the system in terms of specifications, as well as waste in terms of cost and material. Therefore, even in the ground improvement method using a hardening agent liquid or a high-pressure jet liquid of water containing a hardening agent that can improve the inside of the target ground without digging the target ground, any plane is a polygonal wall-shaped improvement area or plane. There is a long-awaited need for a construction method that can efficiently create a polygonal continuous wall-shaped improvement area, and furthermore, a polygonal wall-like improvement area or a plane-continuous polygonal wall-like improvement area as a gravity block or pressure-resistant block. There is a long-awaited need for technologies that can be used as well as environmentally friendly technologies that make use of native soil.
[0005]
[Means for Solving the Problems]
In view of the above circumstances, the present invention provides a new ground improvement method, in which a flat surface is formed in a predetermined direction at a tip portion in order to form a polygonal wall-shaped improvement region or a polygonal continuous wall-like improvement region. A rod having a plurality of nozzles arranged toward the target ground is inserted into the target ground, and a high-pressure jet liquid of a hardener liquid or a hardener containing a hardener at a predetermined pressure from nozzles of a predetermined diameter at a plurality of predetermined nozzles among the plurality of nozzles. By simultaneously stopping and / or rotating and / or withdrawing / inserting an arbitrary angle while ejecting the high-pressure jet liquid, the flight distance and direction of the high-pressure jet liquid ejected from each nozzle are managed and controlled to a predetermined position. The trajectory of the high-pressure jet liquid of the previously created original ground wall improvement body in the construction method of the original ground wall improvement body that interferes with the injection position of the original ground wall improvement body created thereafter Not before The trajectory of the high-pressure jet liquid of the original ground wall improvement body to be formed at the spot is focused and / or joined or crossed to form a plurality of original ground wall improvement bodies, so that the planar wall shape is improved. The ground improvement method is characterized in that the area or plane is a polygonal continuous wall-shaped improvement area.
[0006]
Further, according to the present invention, a rod having a plurality of nozzles arranged in a predetermined direction at a distal end portion is inserted into a target ground, and a predetermined pressure of a plurality of nozzles among a plurality of nozzles is cured at a predetermined pressure. Stopping at a fixed position and / or rotating and / or pulling out or inserting an arbitrary angle while simultaneously ejecting a high-pressure jet liquid containing a liquid agent or a curing agent, the flying distance of the high-pressure jet liquid ejected from each nozzle and In the construction method in which the direction is managed and the original ground wall-like improved body of a predetermined shape is formed at a predetermined position, the trajectory of the high-pressure jet liquid of the previously created original ground wall-like improved body is formed thereafter. The trajectory of the high-pressure jet liquid of the original ground wall-shaped improvement body formed before and after without interfering with the injection position of the wall-like improvement body is focused and / or joined or crossed to form a plurality of original ground wall improvements. body By forming a horizontal plate-shaped partition wall orthogonal to the original ground wall-shaped improved body at a predetermined location of the original ground wall-shaped improved body, and further forming the partition wall on the original ground at the predetermined location, the flat surface is a polygonal wall. The ground improvement method is characterized by forming a wall-shaped improvement area in which a wall provided with partition walls in the shape improvement area or a predetermined portion of the original ground has a polygonal continuous shape.
[0007]
Still further, according to the present invention, a rod having a plurality of nozzles arranged in a predetermined direction at a distal end portion is inserted into a target ground, and a predetermined pressure is applied to a plurality of nozzles having a predetermined diameter at a plurality of nozzles. The flight distance of the high-pressure jet liquid ejected from each nozzle by stopping at a fixed position and / or rotating and / or pulling out or inserting an arbitrary angle while simultaneously injecting a high-pressure jet liquid of a curing agent liquid or water containing a curing agent. In the method of operating and controlling the direction and forming the original ground wall-like improved body of a predetermined shape at a predetermined position, the trajectory of the high-pressure jet liquid of the previously formed original ground wall-like improved body is formed thereafter. The trajectory of the high-pressure jet liquid of the original ground wall-shaped improvement body formed before and after focusing on and / or joining or intersecting the plurality of original ground wall forms without disturbing the injection position of the ground wall-shaped improvement body By forming a good body, and further integrally forming a horizontal plate-shaped partition wall orthogonal to the original ground wall-shaped improved body at a predetermined location of the original ground wall-shaped improved body, a gravity is provided around the original ground at the predetermined location. The ground improvement method is characterized in that a block or a pressure-resistant block has a polygonal wall-shaped improvement area or a continuous polygonal wall-like improvement area.
[0008]
The present invention also provides a means for inserting a rod into the ground, and a fixed-position stop and / or while simultaneously jetting a high-pressure jet liquid of water containing a hardener or a hardener from a plurality of nozzles at the tip of the rod. A ground improvement device comprising a means for rotating at an arbitrary angle and / or withdrawing or inserting, and forming a wall-shaped improvement area having a polygonal flat surface or a continuous wall-shaped improvement area having a polygonal continuous shape.
[0009]
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present invention will be described in detail below based on specific embodiments shown in the accompanying drawings.
[0010]
The tip of the rod used in the present invention has a plurality of nozzles. The nozzle may be installed horizontally with respect to the rod, or may be installed vertically or obliquely. Since the diameter and shape of the nozzle, the injection direction, and the injection pressure are each set to a predetermined or arbitrary value, the nozzles on the same rod do not need to have the same diameter and pressure, but can be set individually.
[0011]
FIG. 1 shows a rod 1 provided with three nozzles 3 and FIG. 2 shows a rod 1 provided with four nozzles 3. Here, the cross-sectional shape of the rod 1 may be either circular or square, and all the nozzles 3 may be used at the same time, or only arbitrary portions may be used. The diameter of the nozzle 3 can be set individually on the same rod. One or several hardener passages are connected to each nozzle inside the rod 1, and water containing a hardener is jetted into the ground as a high-pressure jet liquid of about 200 to 600 kgf / cm 2 . In addition to spraying only water containing a curing agent alone, spraying water containing a fibrous curing material alone, or spraying water containing a curing agent or water containing a fibrous curing material together with compressed air There is also. Further, the nozzle 3 may be provided on a rod tip mounting block 2 mounted on the tip of the rod 1, and the required number of rod tip mounting blocks 2 may be mounted and used.
[0012]
FIG. 3 shows an example of a rod 1 in which two rod tip mounting blocks 2 each having three nozzles 3 having a diameter of 2.8 mm uniformly arranged at an inner angle of 120 ° are mounted at two tip ends. One or several hardener passages are provided inside the rod 1 and are connected to the respective nozzles 3 of the rod tip mounting block 2. The high-pressure jet liquid containing the hardener containing 200 to 600 kgf / cm 2 is used. Injected into the ground as. In addition to spraying only water containing a curing agent alone, spraying water containing a fibrous curing material alone, or spraying water containing a curing agent or water containing a fibrous curing material together with compressed air There is also. When the rod 1 of FIG. 3 is used, the trajectory 4 of the hardener liquid or the high-pressure jet liquid of the water containing the hardener is evenly arranged at an inner angle of 60 ° toward the outside as shown in FIG.
[0013]
A method of forming the hexagonal wall-shaped improved area 11 and the hexagonal continuous wall-shaped improved area 12 using the rod 1 shown in FIG. 1 will be described.
[0014]
As shown in FIG. 5, the rod 1 is inserted into the target ground 5 to a predetermined depth by a boring machine or an appropriate means such as an earth auger.
[0015]
Subsequently, when water or a high-pressure jet liquid containing a fibrous hardener such as high-pressure cement milk that has passed through the hardener passage of the rod 1 is jetted from the nozzle 3, a locus 4 of the high-pressure jet liquid as shown in FIG. Can be. The length of the trajectory of the high-pressure jet from the nozzle to the tip portion is 0.5 m when the nozzle diameter is 1.8 mm when the jet pressure is 400 kgf / cm 2 for 1 second in a normal sandy ground. It is about 1.5 m, about 1 m to 2 m when the nozzle diameter is 2.8 mm, and 2 m to 4 m when the nozzle diameter is 3.8 mm.
[0016]
Next, while the rod 1 is raised by about 2 to 5 cm per step, high-pressure jet liquid is injected, and the rod 1 is pulled out to a predetermined height, the original ground wall-shaped improved body 10 as shown in FIG. 7 can be formed. . Further, when the rod is rotated at a predetermined angle at each step position and the rod 1 is pulled out to a predetermined height, an original ground wall-like improved body 10 as shown in FIG. 8 can be formed. This is effective when a wall thickness is required.
[0017]
At a location adjacent to the ground improvement body 10 in FIG. 7, the trajectory 4 of the high-pressure jet liquid of the improvement ground body 10 previously formed hinders the injection position of the improvement ground improvement body wall to be formed thereafter. Without forming, the trajectory 4 of the high-pressure jet liquid of the original ground wall improvement body 10 formed before and after focuses and / or joins or intersects to form two original ground wall improvement bodies 10. FIG. 9 shows an example in which a wall-shaped improvement area 11 having a hexagonal flat surface is formed. When a predetermined number of original ground wall-like improved bodies 10 are similarly formed at a location where this plane is adjacent to the hexagonal wall-shaped improved area 11, a hexagonal continuous wall-shaped improved area 12 as shown in FIG. 10 can be formed. .
[0018]
When a predetermined number of original ground wall-like improved bodies 10 are formed using the rods 1 shown in FIG. 2, a wall-shaped improved area 13 having a continuous rectangular plane as shown in FIG. 11 can be formed. When it is desired to reduce the distance between the walls, the original ground wall-like improved body 10 can be arbitrarily arranged as shown in FIG. 12 to form a wall-shaped improved area 13 having a continuous rectangular plane.
[0019]
When a predetermined number of original ground wall-like improved bodies 10 are formed using the rods shown in FIG. 3, a wall-shaped improved area 14 in which the plane is a continuous parallelogram as shown in FIG. 13 can be formed.
[0020]
Next, a description will be given of a method of forming the wall-shaped improved area 15 having a continuous regular triangular shape using the rods shown in FIGS.
[0021]
Using the rod of FIG. 1, a wall-shaped improved area 11 having a hexagonal flat surface or a continuous wall-shaped improved area 12 having a hexagonal continuous surface as shown in FIGS. 9 and 10 is formed. 14 is inserted into the central part of the wall-shaped improvement area 11 having a hexagonal flat surface or the continuous wall-shaped improvement area 12 having a hexagonal continuous shape as shown in FIG. When the liquid is sprayed and the rod 1 is pulled out to a predetermined height, a wall-shaped improvement area 13 having a regular triangular continuous plane as shown in FIG. 15 can be formed. At this time, attention should be paid to the hardening state of the previously formed wall-shaped improvement area 11 having a hexagonal flat surface or the continuous wall-shaped improvement area 12 having a hexagonal continuous shape. The trajectory 4 of the high-pressure jet liquid of the original ground wall-shaped improvement body 10 formed before and after focuses on the trajectory 4 of the liquid without hindering the injection position of the original ground wall-shaped improvement body 10 to be formed thereafter and / or Alternatively, it is necessary to determine the order of construction so as to join or cross.
[0022]
In FIG. 16, in the hexagonal continuous wall-shaped improvement area 12 shown in FIG. 10, a horizontal plate-shaped partition wall 16 is integrally formed at a predetermined location, so that a plane provided with a partition wall on a predetermined location of the original ground has a hexagonal continuous shape. An example in which a wall-shaped improved area 12 is formed is shown. The wall-shaped improvement area 12 having a continuous hexagonal flat surface has a waterproof property. Here, an example is shown in the wall-shaped improvement area 12 in which the plane is a hexagonal continuous shape, but the horizontal plate-like partition 16 can be integrally formed at a predetermined position in any polygon, not limited to the hexagon.
[0023]
In FIG. 17, in the rectangular continuous wall-shaped improvement area 13, horizontal plate-shaped partitions 16 are integrally formed at both ends, so that a partition is provided around the original ground at a predetermined location, and a plane as a gravity block or a pressure-resistant block is formed. An example in which a quadrangular continuous wall-shaped improvement area 13 is formed is shown. The gravity block or the pressure-resistant block is characterized in that the original ground is enclosed therein for use. Here, an example is shown in the wall-shaped improvement area 13 in which the plane is a quadrangular continuous shape. However, the present invention is not limited to the quadrangular shape. Can be used as
[0024]
The present invention can be used not only in the vertical direction but also in the horizontal direction and the oblique direction as shown in FIG. Furthermore, using the management device 7, the injection pressure, the injection angle, the injection time, the injection direction, the pulling speed, the depth, the forming angle, the slurry distance, and the like can be managed in a unified manner.
[0025]
【The invention's effect】
According to the present invention, a rod having a plurality of nozzles arranged in a predetermined direction at a distal end thereof is inserted into a target ground, and a hardener liquid having a predetermined pressure is supplied from a plurality of nozzles having a predetermined diameter at a predetermined plurality of nozzles. Alternatively, while simultaneously jetting a high-pressure jet liquid of water containing a curing agent, stopping at a fixed position and / or rotating and / or pulling out or inserting an arbitrary angle, the flight distance and direction of the high-pressure jet liquid jetted from each nozzle can be changed. In the method of operation-management to create an original ground wall-like improved body of a predetermined shape at a predetermined position, the trajectory of the high-pressure jet liquid of the previously created original ground wall-like improved body is used to form the original ground wall-shaped body. Without hindering the injection position of the improved body, the trajectory of the high-pressure jet liquid of the original ground wall-like improved body formed before and after focuses and / or joins or intersects to form a plurality of original ground wall-like improved bodies. Creation This is a ground improvement method characterized by creating a wall-shaped improvement area where the plane is a polygon or a continuous wall-shaped improvement area where the plane is a polygon. The wall-shaped improvement area or the plane-shaped wall-shaped improvement area having a continuous polygonal shape can be formed.
[0026]
Specifically, the present invention inserts a rod having a plurality of nozzles arranged in a predetermined direction at a distal end portion into a target ground, and a predetermined number of nozzles having a predetermined diameter from a plurality of nozzles among a plurality of nozzles. Stopping at a fixed position and / or rotating and / or pulling out or inserting an arbitrary angle while simultaneously injecting a high-pressure jet liquid or a high-pressure jet liquid of water containing a hardener, the high-pressure jet liquid injected from each nozzle is In the construction method of creating an original ground wall-like improved body of a predetermined shape at a predetermined position by controlling the flight distance and direction, the trajectory of the high-pressure jet liquid of the previously created original ground wall-like improved body is created later. The trajectory of the high-pressure jet liquid of the original ground wall-shaped improvement body formed before and after focusing on and / or joining or intersecting the plurality of original grounds without interfering with the injection position of the original ground wall-like improved body Wall shape By forming a good body, and further forming a horizontal plate-shaped partition wall orthogonal to the original ground wall improvement body at a predetermined location of the original ground wall improvement body, there are many flat A ground improvement method is characterized in that a square wall-like improvement area or a plane provided with a partition wall on a predetermined place of the original ground forms a polygonal continuous wall-like improvement area.
[0027]
Specifically, the present invention inserts a rod having a plurality of nozzles arranged in a predetermined direction at a distal end portion into a target ground, and a predetermined number of nozzles having a predetermined diameter from a plurality of nozzles among a plurality of nozzles. Stopping at a fixed position and / or rotating and / or pulling out or inserting an arbitrary angle while simultaneously injecting a high-pressure jet liquid or a high-pressure jet liquid of water containing a hardener, the high-pressure jet liquid injected from each nozzle is In the construction method of creating an original ground wall-like improved body of a predetermined shape at a predetermined position by controlling the flight distance and direction, the trajectory of the high-pressure jet liquid of the previously created original ground wall-like improved body is created later. The trajectory of the high-pressure jet liquid of the original ground wall-shaped improvement body formed before and after focusing on and / or joining or intersecting the plurality of original grounds without interfering with the injection position of the original ground wall-like improved body Wall shape By forming a good body, and further integrally forming a horizontal plate-shaped partition wall orthogonal to the original ground wall-shaped improved body at a predetermined location of the original ground wall-shaped improved body, a gravity is provided around the original ground at the predetermined location. The ground improvement method is characterized in that a block or a pressure-resistant block has a polygonal wall-shaped improvement area or a continuous polygonal wall-like improvement area.
[0028]
In addition, the present invention provides a soil improvement device having a corresponding construction means, a means for inserting a rod into the ground, and a water containing a curing agent liquid or a curing agent from a plurality of nozzles at the tip of the rod. Means for stopping at a fixed position and / or rotating and / or withdrawing or inserting at an arbitrary angle while simultaneously jetting a high-pressure jet liquid, wherein the plane has a predetermined polygonal wall-shaped improvement area or the plane has a predetermined polygonal continuous wall. A ground improvement device that creates a shape improvement area.
[Brief description of the drawings]
FIG. 1 is a perspective view of a rod having three nozzles according to an embodiment of the present invention.
FIG. 2 is a perspective view of a rod having four nozzles according to the embodiment of the present invention.
FIG. 3 is a perspective view of a rod on which two rod tip mounting blocks each having three nozzles are mounted according to the embodiment of the present invention.
FIG. 4 is a plan view showing a state where the rod of FIG. 3 is used.
FIG. 5 is a front view of a state in which a rod is inserted into the ground by the forming machine of the present invention.
FIG. 6 is a plan view showing a state where the rod of FIG. 1 is used.
FIG. 7 is a perspective view of an original ground wall-like improved body formed using the rod of FIG. 1;
FIG. 8 is a perspective view of an original ground wall-like improved body formed using the rod of FIG. 1;
FIG. 9 is a plan view of a wall-shaped improvement area having a hexagonal flat surface created by using the rod of FIG. 1;
FIG. 10 is a plan view of a wall-shaped improvement area having a hexagonal continuous plane formed by using the rod of FIG. 1;
FIG. 11 is a plan view of a wall-shaped improvement area in which a plane formed using the rod of FIG. 2 has a rectangular continuous shape.
FIG. 12 is a plan view of a wall-shaped improvement area in which a plane formed by using the rod of FIG. 2 has a continuous rectangular shape.
FIG. 13 is a plan view of a wall-shaped improvement area in which a plane formed by using the rod of FIG. 3 has a parallelogram continuous shape.
14 is a perspective view showing a state where the rod of FIG. 3 is used by being inserted into a predetermined location on a predetermined ground.
FIG. 15 is a plan view of a wall-shaped improvement area in which a plane formed by using the rods of FIGS. 1 and 3 is an equilateral triangle continuous shape. FIG. 16 is a plan view in which a horizontal plate-shaped partition wall is provided at a predetermined position. It is a perspective view of a hexagonal continuous wall-shaped improvement area.
FIG. 17 is a cross-sectional view of a wall-shaped improved area in which a horizontal plate-shaped partition wall is provided at a predetermined position to form a gravity block or a pressure-resistant block, and the plane is a continuous rectangle.
FIG. 18 is a perspective view showing a state where the present invention is implemented in a horizontal direction.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Rod 2 ... Rod tip mounting block 3 ... Nozzle 4 ... High-pressure jet liquid trajectory 5 ... Target ground 6 ... Creation machine 7 ... Management device 10 ... Original ground wall-shaped improved body 11 ... Plane-shaped hexagonal wall-shaped improved area 12: Improved wall-shaped area having a hexagonal continuous plane 13 ... Improved wall-shaped area having a continuous rectangular plane 14 ... Improved wall-shaped area having a continuous rectangular parallelepiped 15: Wall-shaped area having an equilateral triangular continuous shape Improved area 16: Horizontal plate-shaped partition

Claims (4)

先端部に所定方向に向かって配置された複数個のノズルを有するロッドを対象地盤に挿入し、複数個のノズルのうち所定複数箇所の所定径のノズルより所定圧力の硬化剤液または硬化剤を含む水の高圧ジェット液を同時に噴射しながら定位置停止および/または任意角度回転および/または引き抜くか挿入することで、各ノズルより噴射される該高圧ジェット液の飛距離と方向を操作管理して所定の位置に所定の形状の原地盤壁状改良体を造成する工法にあって、先に造成した原地盤壁状改良体の高圧ジェット液の軌跡が以後造成する原地盤壁状改良体の噴射位置に支障となることなく、前後に造成する原地盤壁状改良体の高圧ジェット液の軌跡が焦点を結ぶかおよび/または接合或いは交叉させて複数の原地盤壁状改良体を造成することで、平面が多角形の壁状改良域または平面が多角形連続状の壁状改良域を造成することを特徴とする地盤改良工法。A rod having a plurality of nozzles arranged in a predetermined direction at a distal end portion is inserted into the target ground, and a hardener liquid or a hardener having a predetermined pressure is supplied from a plurality of nozzles having a predetermined diameter at a predetermined plurality of nozzles. By stopping and / or rotating and / or pulling out or inserting an arbitrary angle while simultaneously jetting the high-pressure jet liquid containing water, the flight distance and direction of the high-pressure jet liquid jetted from each nozzle are operated and controlled. In the method of forming the original ground wall improved body of a predetermined shape at a predetermined position, the trajectory of the high-pressure jet liquid of the previously formed original ground wall improved body is injected by the original ground wall improved body formed thereafter. The trajectory of the high-pressure jet liquid of the original ground wall improvement body formed before and after without obstructing the position focuses and / or joins or intersects to form a plurality of original ground wall improvement bodies. Ground improvement method that plane wall state improving area or plane polygons, characterized in that construct a wall-like improvement zone polygonal continuous shape. 先端部に所定方向に向かって配置された複数個のノズルを有するロッドを対象地盤に挿入し、複数個のノズルのうち所定複数箇所の所定径のノズルより所定圧力の硬化剤液または硬化剤を含む水の高圧ジェット液を同時に噴射しながら定位置停止および/または任意角度回転および/または引き抜くか挿入することで、各ノズルより噴射される該高圧ジェット液の飛距離と方向を操作管理して所定の位置に所定の形状の原地盤壁状改良体を造成する工法にあって、先に造成した原地盤壁状改良体の高圧ジェット液の軌跡が以後造成する原地盤壁状改良体の噴射位置に支障となることなく、前後に造成する原地盤壁状改良体の高圧ジェット液の軌跡が焦点を結ぶかおよび/または接合或いは交叉させて複数の原地盤壁状改良体を造成し、さらに原地盤壁状改良体の所定箇所において原地盤壁状改良体と直交する水平板状隔壁を一体造成することで、所定箇所の原地盤に隔壁を設けた平面が多角形の壁状改良域または所定箇所の原地盤に隔壁を設けた平面が多角形連続状の壁状改良域を造成することを特徴とする地盤改良工法。A rod having a plurality of nozzles arranged in a predetermined direction at a distal end portion is inserted into the target ground, and a hardener liquid or a hardener having a predetermined pressure is supplied from a plurality of nozzles having a predetermined diameter at a predetermined plurality of nozzles. By stopping and / or rotating and / or pulling out or inserting an arbitrary angle while simultaneously jetting the high-pressure jet liquid containing water, the flight distance and direction of the high-pressure jet liquid jetted from each nozzle are operated and controlled. In the method of forming the original ground wall improved body of a predetermined shape at a predetermined position, the trajectory of the high-pressure jet liquid of the previously formed original ground wall improved body is injected by the original ground wall improved body formed thereafter. Without hindering the position, the trajectory of the high-pressure jet liquid of the original ground wall-like improved body formed before and after focuses and / or joins or intersects to form a plurality of original ground wall-like improved bodies, By integrally forming a horizontal plate-like partition wall orthogonal to the original ground wall-like improvement body at a predetermined location of the ground wall-like improvement body, the plane provided with the partition wall on the original ground at the predetermined location has a polygonal wall-like improvement area or a predetermined area. A ground improvement method characterized in that a flat surface provided with a partition on the original ground at a location forms a continuous wall-shaped improvement area having a polygonal shape. 先端部に所定方向に向かって配置された複数個のノズルを有するロッドを対象地盤に挿入し、複数個のノズルのうち所定複数箇所の所定径のノズルより所定圧力の硬化剤液または硬化剤を含む水の高圧ジェット液を同時に噴射しながら定位置停止および/または任意角度回転および/または引き抜くか挿入することで、各ノズルより噴射される該高圧ジェット液の飛距離と方向を操作管理して所定の位置に所定の形状の原地盤壁状改良体を造成する工法にあって、先に造成した原地盤壁状改良体の高圧ジェット液の軌跡が以後造成する原地盤壁状改良体の噴射位置に支障となることなく、前後に造成する原地盤壁状改良体の高圧ジェット液の軌跡が焦点を結ぶかおよび/または接合或いは交叉させて複数の原地盤壁状改良体を造成し、さらに原地盤壁状改良体の所定箇所において原地盤壁状改良体と直交する水平板状隔壁を一体造成することで、所定箇所の原地盤の周囲に隔壁を設けた重力ブロックもしくは耐圧ブロックとしての平面が多角形の壁状改良域または平面が多角形連続状の壁状改良域を造成することを特徴とする地盤改良工法。A rod having a plurality of nozzles arranged in a predetermined direction at a distal end portion is inserted into the target ground, and a hardener liquid or a hardener having a predetermined pressure is supplied from a plurality of nozzles having a predetermined diameter at a predetermined plurality of nozzles. By stopping and / or rotating and / or pulling out or inserting an arbitrary angle while simultaneously jetting the high-pressure jet liquid containing water, the flight distance and direction of the high-pressure jet liquid jetted from each nozzle are operated and controlled. In the method of forming the original ground wall improved body of a predetermined shape at a predetermined position, the trajectory of the high-pressure jet liquid of the previously formed original ground wall improved body is injected by the original ground wall improved body formed thereafter. Without hindering the position, the trajectory of the high-pressure jet liquid of the original ground wall-like improved body formed before and after focuses and / or joins or intersects to form a plurality of original ground wall-like improved bodies, By integrally forming a horizontal plate-like partition wall orthogonal to the original ground wall-like improved body at a predetermined place of the ground wall-like improved body, a plane as a gravity block or a pressure-resistant block having a partition wall around the original ground at the predetermined place is formed. A ground improvement method characterized by forming a polygonal wall-shaped improvement area or a polygonal continuous wall-shaped improvement area. ロッドを地中に挿入する手段と、ロッドの先端部の複数箇所のノズルより硬化剤液または硬化剤を含む水の高圧ジェット液を同時に噴射しながら定位置停止および/または任意角度回転および/または引き抜くか挿入する手段とよりなり、平面が所定多角形の壁状改良域または平面が所定多角形連続状の壁状改良域を造成する地盤改良装置であって、請求項1,2および3に対応した施工する手段を備えた地盤改良装置。A means for inserting the rod into the ground, and a fixed-position stop and / or rotation at an arbitrary angle and / or while simultaneously jetting a high-pressure jet liquid of water containing a hardener or a hardener from a plurality of nozzles at the tip of the rod. A ground improvement device comprising a means for pulling out or inserting and forming a wall-shaped improvement area having a predetermined polygonal plane or a continuous wall-shaped improvement area having a predetermined polygonal continuous plane. Ground improvement equipment with corresponding construction means.
JP2003147011A 2003-04-17 2003-04-17 Ground improvement method and ground improvement device Pending JP2004316397A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003147011A JP2004316397A (en) 2003-04-17 2003-04-17 Ground improvement method and ground improvement device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003147011A JP2004316397A (en) 2003-04-17 2003-04-17 Ground improvement method and ground improvement device

Publications (1)

Publication Number Publication Date
JP2004316397A true JP2004316397A (en) 2004-11-11

Family

ID=33475348

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003147011A Pending JP2004316397A (en) 2003-04-17 2003-04-17 Ground improvement method and ground improvement device

Country Status (1)

Country Link
JP (1) JP2004316397A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006249847A (en) * 2005-03-14 2006-09-21 Nit:Kk Grouting method for ground hardener and its device
JP2007211542A (en) * 2006-02-13 2007-08-23 Mitsubishi Heavy Ind Ltd Antiseismic structure of quaywall, and its construction method and device
JP2009041262A (en) * 2007-08-09 2009-02-26 Hazama Corp Method of designing radial improvement body for use in soil improving method
JP2009281017A (en) * 2008-05-21 2009-12-03 Asahi Kasei Construction Materials Co Ltd Spiral rod
JP4785100B1 (en) * 2010-11-30 2011-10-05 浩子 松本 Improved body construction method
JP2014173275A (en) * 2013-03-07 2014-09-22 Hiroko Matsumoto Improvement body establishment method
JP2015187352A (en) * 2014-03-27 2015-10-29 株式会社不動テトラ Ground improvement method by high pressure injection agitation method, and special head used for ground improvement method
JP2016056650A (en) * 2014-09-12 2016-04-21 株式会社テノックス Device and method for manufacturing hydraulic solidification material liquid-substituted column, and hydraulic solidification material liquid-substituted column
JP2022046385A (en) * 2020-09-10 2022-03-23 株式会社日東テクノ・グループ Ground improvement method and ground improvement body by honeycomb structure

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006249847A (en) * 2005-03-14 2006-09-21 Nit:Kk Grouting method for ground hardener and its device
JP2007211542A (en) * 2006-02-13 2007-08-23 Mitsubishi Heavy Ind Ltd Antiseismic structure of quaywall, and its construction method and device
JP2009041262A (en) * 2007-08-09 2009-02-26 Hazama Corp Method of designing radial improvement body for use in soil improving method
JP2009281017A (en) * 2008-05-21 2009-12-03 Asahi Kasei Construction Materials Co Ltd Spiral rod
JP2012132293A (en) * 2010-11-30 2012-07-12 Hiroko Matsumoto Improvement body creation method
WO2012073687A1 (en) * 2010-11-30 2012-06-07 Matsumoto Hiroko Improvement body creating method
JP4785100B1 (en) * 2010-11-30 2011-10-05 浩子 松本 Improved body construction method
CN103221614A (en) * 2010-11-30 2013-07-24 松本浩子 Improvement body creating method
CN103221614B (en) * 2010-11-30 2014-10-15 松本浩子 Improvement body creating method
JP2014173275A (en) * 2013-03-07 2014-09-22 Hiroko Matsumoto Improvement body establishment method
JP2015187352A (en) * 2014-03-27 2015-10-29 株式会社不動テトラ Ground improvement method by high pressure injection agitation method, and special head used for ground improvement method
JP2016056650A (en) * 2014-09-12 2016-04-21 株式会社テノックス Device and method for manufacturing hydraulic solidification material liquid-substituted column, and hydraulic solidification material liquid-substituted column
JP2022046385A (en) * 2020-09-10 2022-03-23 株式会社日東テクノ・グループ Ground improvement method and ground improvement body by honeycomb structure

Similar Documents

Publication Publication Date Title
JP2009280966A (en) Steel pipe pile and construction method therefor
JP2004316397A (en) Ground improvement method and ground improvement device
JP3550392B2 (en) Ground improvement method and ground improvement equipment
JP2016075040A (en) Ground improvement method
JP5717148B2 (en) Underground consolidated body construction method
KR20200001852U (en) Improved, reinforced pile, pier, footing, caisson, foundation and its supporting building, facility, bridge, structure
JP5558280B2 (en) High-pressure jet stirring method
JP4437718B2 (en) Improved body construction method and improved body construction equipment
JP2008069549A (en) Equipment and construction method for creating underground consolidation body
JP6183742B2 (en) Improved body construction method
CN108057716A (en) A kind of high-pressure rotary-spray soil remediation drill bit
JPH1018283A (en) Reclamation method of wall-state improvement body
JP5457588B1 (en) Improvement area creation method
JP4313773B2 (en) Ground hardening material injection method and its equipment
JP2014169535A (en) Improvement area formation method
JP2000290991A (en) Soil improvement method
JP2013036213A (en) Ground division improvement method
KR20080066902A (en) Hardening layer construction method and device therefor
JP4515317B2 (en) Consolidation production method and apparatus
JP6672016B2 (en) Ground improvement method under the existing structure
JP5782601B2 (en) Improved body construction method
JP5929226B2 (en) Quadrilateral block improvement body construction method
JP3231427B2 (en) Solidifying agent jet nozzle and solidifying agent injection method
JP6203101B2 (en) Ground improvement method by high-pressure jet stirring method and special head used in this ground improvement method
JP3887557B2 (en) Ground improvement method and its monitoring mechanism