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JP2009270326A - Construction device and construction method of soil cement column - Google Patents

Construction device and construction method of soil cement column Download PDF

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JP2009270326A
JP2009270326A JP2008121159A JP2008121159A JP2009270326A JP 2009270326 A JP2009270326 A JP 2009270326A JP 2008121159 A JP2008121159 A JP 2008121159A JP 2008121159 A JP2008121159 A JP 2008121159A JP 2009270326 A JP2009270326 A JP 2009270326A
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diameter
cylindrical tube
soil cement
slit
excavation
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Takashi Amagai
雨甲斐隆
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CHIYODA SOILTECH Inc
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CHIYODA SOILTECH Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To prevent a solidifying material for constructing a soil cement column from overflowing onto the ground. <P>SOLUTION: An excavation shaft 1 is rotated to rotate an excavation blade 2 positioned at a lower end part and to allow the excavation shaft 1 to break into the ground, and the solidifying material 15 is poured through a solidifying material filling port 6. A cylindrical pipe 4 positioned around an outer periphery of the excavation shaft 1 is propelled, and the natural ground is pushed aside toward the outer periphery by a tapered part whose diameter gradually becomes larger upward from the lower end. The solidifying material 15 is poured to fill the part from where the natural ground is pushed away. A slit 41 is formed in the cylindrical pipe 4 in the excavation direction in a separable manner in right and left directions. The diameter of the cylindrical pipe 4 is changed by repeatedly increasing and decreasing the width of the slit 41 serving as a border. When the diameter of the cylindrical pipe 4 is increased, the natural soil is pushed away toward the outer periphery, and when it is reduced, the cylindrical pipe 4 is propelled. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、ソイルセメント柱を構築する装置と、その構築方法に関するものである。   The present invention relates to an apparatus for constructing a soil cement pillar and a construction method thereof.

特開平7−138937号公報に記載されたようなソイルセメント柱の構築装置が知られている。
構築装置は、動力によって回転する掘削軸の下端に地盤を掘削するための掘削翼を有しており、この掘削翼によって地盤に削孔を掘削し、掘削軸の先端からミルク状凝固材を吐出しながら掘削進行していく。
掘削翼の上方に配した攪拌翼によって、凝固材と掘削した土砂を攪拌して、ソイルセメント柱を構築していくものである。
An apparatus for constructing a soil cement column as described in JP-A-7-138937 is known.
The construction device has a drilling blade for excavating the ground at the lower end of a drilling shaft that is rotated by power. This drilling blade drills a hole in the ground and discharges milk-like solidified material from the tip of the drilling shaft. The excavation progresses while.
The soil cement pillar is constructed by stirring the solidified material and the excavated earth and sand with the stirring blade disposed above the drilling blade.

前記した従来のソイルセメント柱の構築方法にあっては、次のような問題点がある。
<1> ソイルセメント柱は、オーガー軸の先端から凝固材を加圧して吐出し、土と攪拌して地中に形成される。その際に凝固材は加圧状態にあるから、この凝固材混りの原土が地上に押し上げられる現象を避けられなかった。
つまりは、凝固材(セメントミルク)注入体積分、おおよそ改良体積の約25〜18%ほど注入するので、その分、地上にミルク混じりの土が盛り上がって残土となるものである。
<2> こうして地上に吹き出した凝固材の混じった残土は地表面に残土の山となって盛り上がる。この残土の山は改良に使われずに無駄になるだけでなく、ダンプトラック数台分の廃棄物となり、運搬、残土処理が必要となり、工期が長くなり、余分な費用が嵩むという不経済なものであった。
特開平7−138937号公報
The above-described conventional method for constructing a soil cement pillar has the following problems.
<1> The soil cement column is formed in the ground by pressurizing and discharging the solidified material from the tip of the auger shaft and stirring the soil. At that time, since the solidified material is in a pressurized state, the phenomenon that the raw soil mixed with the solidified material is pushed up to the ground cannot be avoided.
In other words, about 25 to 18% of the volume of solidified material (cement milk) injected, approximately the improved volume is injected, and accordingly, the soil mixed with milk rises and becomes the remaining soil.
<2> The remaining soil mixed with the solidified material thus blown to the ground rises as a pile of remaining soil on the ground surface. This pile of leftover soil is not used for improvement and is wasted, but it becomes waste for several dump trucks, which requires transportation and waste disposal, which requires a longer construction period and extra costs. Met.
JP 7-138937 A

解決しようとする課題は、地中に注入した凝固材分の凝固材と土砂とを混練した土が地表面に押し上げられることである。   The problem to be solved is that the soil obtained by kneading the solidified material for the solidified material injected into the ground and the earth and sand is pushed up to the ground surface.

本発明にかかるソイルセメント柱の構築装置は、
動力によって回転する掘削軸の下端部に、凝固材注入口と掘削翼とを備えるソイルセメント柱の構築装置であって、
掘削翼よりも上方に、下端の直径よりも直径が徐々に大きくなり、少なくとも一部が下端よりも大きな径となった円筒管を配し、
前記円筒管には掘削方向に向って、その左右両側に離隔可能にスリットを形成し、
当該スリットの幅が拡大と縮小を繰り返す。
本発明にかかる他のソイルセメント柱の構築装置は、
動力によって回転する掘削軸の下端部に、凝固材注入口と掘削翼とを備えるソイルセメント柱の構築装置であって、
前記掘削軸とは別個に、動力によって回転するとともに、偏心カムを有する揺動シャフトを配し、
掘削翼よりも上方に、下端の直径よりも直径が徐々に大きくなり、少なくとも一部が下端よりも大きな径となった円筒管を配し、
円筒管には掘削方向の左右に離隔可能にスリットを形成し、
前記円筒管のスリットの左右いずれか一方側端に、前記偏心カムの周りを囲む揺動リングを設け、
前記円筒管のスリットの左右いずれかの他方側端に、揺動シャフトを通してなる。
本発明にかかる他のソイルセメント柱の構築装置は、
円筒管の下端の径は、掘削翼の回転直径とほぼ同じであって、
その上方の少なくとも一部がそれよりも大きな直径を有している。
本発明にかかるソイルセメント柱の構築方法は、
上記したソイルセメント柱の構築装置を使用した構築方法であって、
掘削翼によって掘削した削孔の径を、円筒管の徐々に径が大きくなるテーパ部分によって拡大しながら、土砂を外側へ押しやり、
土砂を押しのけた分の凝固材と混練された流動土を充填していき、
円筒管の直径が拡大・縮小を繰り返すことで、円筒管を進行するものである。
An apparatus for constructing a soil cement pillar according to the present invention is as follows.
An apparatus for constructing a soil cement column including a solidified material injection port and a drilling blade at a lower end portion of a drilling shaft rotated by power,
Above the excavating blade, arrange a cylindrical tube whose diameter is gradually larger than the diameter of the lower end and at least part of which is larger than the lower end,
A slit is formed in the cylindrical tube so as to be separable on both right and left sides in the excavation direction,
The slit width repeats expansion and reduction.
Another soil cement pillar construction device according to the present invention is:
An apparatus for constructing a soil cement column including a solidified material injection port and a drilling blade at a lower end portion of a drilling shaft rotated by power,
Separately from the excavation shaft, it is rotated by power, and an oscillating shaft having an eccentric cam is arranged,
Above the excavating blade, arrange a cylindrical tube whose diameter is gradually larger than the diameter of the lower end and at least part of which is larger than the lower end,
A slit is formed in the cylindrical tube so that it can be separated to the left and right in the excavation direction.
A swing ring surrounding the eccentric cam is provided on either the left or right side end of the slit of the cylindrical tube,
An oscillating shaft is passed through either the left or right other end of the slit of the cylindrical tube.
Another soil cement pillar construction device according to the present invention is:
The diameter of the lower end of the cylindrical tube is almost the same as the rotating diameter of the excavating blade,
At least a portion above it has a larger diameter.
The construction method of the soil cement pillar according to the present invention is as follows.
A construction method using the soil cement pillar construction device described above,
While expanding the diameter of the hole drilled by the excavating blade by the taper part where the diameter gradually increases,
Filled with the solidified material and kneaded fluid soil that pushed away the earth and sand,
The cylindrical tube progresses as the diameter of the cylindrical tube repeatedly expands and contracts.

本発明のソイルセメント柱の構築装置と構築方法は以上説明したようになるから次のような効果を得ることができる。
<a> 掘削していない堅い土砂を、下端よりも上方の一部の径が大きい円筒管によって外周方向に押しのけるもので、その押しのけた分に凝固材を注入するものである。これによって、大きな圧力での注入の必要はなく、凝固材が掘削軸を伝って上昇するようなことが生じない。
<b>円筒管は、上方の一部が下端よりも大きな径を有するだけでなく、スリットを境に、そのスリットの幅が拡大と縮小を繰り返すため、土砂を外周に押しのけた後、縮小したとき掘削進行方向に移動し易くなり、掘削の進行の大きな抵抗とならない。
<c> このように凝固材は高い圧力で加圧されていないから、掘削軸を伝わって地上へ吐出してしまうことがなく、設計量通りの全量の凝固材を地中に注入することができる。
<d> このように凝固材は地表へ溢れないから、凝固材を100%活用でき産業廃棄物も発生せず、土の体積に対する凝固材の比率が高くなり、強固なソイルセメント柱を構築することができる。
<e> 凝固材は地表へ溢れず地表に凝固材混じりの残土の山が形成されることがないから、その積み込み、搬出の手間が不要であり、廃棄物を廃棄する費用も発生せず、経済的な施工が可能である。
<f> 凝固材が地表へ上昇してこないから、地表面が泥水で汚れることがなく、整然とした、良好な環境の現場を維持することができる。
Since the soil cement pillar construction apparatus and construction method of the present invention are as described above, the following effects can be obtained.
<a> Hard soil that has not been excavated is pushed away in the outer peripheral direction by a cylindrical tube having a part of the diameter larger than the lower end, and a solidified material is injected into the pushed away portion. This eliminates the need for high pressure injection and prevents the solidified material from rising along the drilling shaft.
<B> The cylindrical tube not only has a larger diameter at the upper part than the lower end, but also the width of the slit repeatedly expands and contracts with the slit as a boundary. Sometimes it becomes easy to move in the direction of excavation and does not become a great resistance to the progress of excavation.
<C> Since the solidified material is not pressurized at a high pressure in this way, the solidified material is not discharged to the ground through the excavation shaft, and the entire amount of the solidified material as designed can be injected into the ground. it can.
<D> Since the solidified material does not overflow to the ground surface in this way, the solidified material can be used 100%, no industrial waste is generated, the ratio of the solidified material to the volume of the soil is increased, and a solid soil cement column is constructed. be able to.
<E> Since the solidified material does not overflow to the ground surface, and no pile of solid soil mixed with the solidified material is formed on the ground surface, there is no need for loading and unloading, and no waste disposal costs are incurred. Economical construction is possible.
<F> Since the solidified material does not rise to the ground surface, the ground surface is not contaminated with muddy water, and an orderly and favorable environment can be maintained.

<1>装置全体の構成
本発明の装置は、回転軸となる掘削軸1と、掘削軸1に回転を与えるモーター16と、掘削軸1の下端に取付けたビットを備えた掘削翼2、掘削翼2の上方に取付けられた外周方向に張り出るとともに、先端部分が着脱自在の攪拌翼3・3、掘削軸1の外周を囲むように配された円筒管4、掘削軸1の内部に配置した凝固材注入路の開口部である掘削軸1の下端の注入口6より構成する。
<1> Overall Configuration of the Apparatus The apparatus of the present invention includes a drilling shaft 1 serving as a rotating shaft, a motor 16 that rotates the drilling shaft 1, a drilling blade 2 that includes a bit attached to the lower end of the drilling shaft 1, and drilling Arranged inside the excavation shaft 1, the stirring blades 3 and 3 which are attached to the upper part of the blade 2 and project in the outer peripheral direction, the tip portion being detachable, the cylindrical tube 4 arranged so as to surround the outer periphery of the excavation shaft 1 It is comprised from the inlet 6 of the lower end of the excavation shaft 1 which is the opening part of the solidified material injection path.

<2>円筒管
下端の掘削翼2の上に、掘削軸1の外周に位置する円筒管4が取り付けてある。
円筒管4の高さは、攪拌翼3.3の高さと同じ程度の高さである。
円筒管4は、その最下端の直径D1が、掘削軸1の回転直径とほぼ同じである。
その最下端から、上方に行くにつれて徐々に直径が大きくなって、つまりは下端から上方にかけて直径が大きくなるテーパ状となっている。
最も大きな直径D2の部分がテーパ状部分の上方にあり、その上は、徐々に直径が小さくなるようテーパ状に形成されている。
円筒管4は、モーター16の周囲に配された環状のリング12から伸びた支持柱13・13によって支持されている。
円筒管4は、掘削方向に対して、その左右両側へ離隔可能にスリット41が形成されている。
つまりは、図で示すスリット41を境に、スリット41の右側部分44と左側部分45が近接離隔可能となって、円筒管4の直径が拡大したり、縮小したりする。
<2> Cylindrical tube The cylindrical tube 4 located on the outer periphery of the excavation shaft 1 is attached on the excavation blade 2 at the lower end.
The height of the cylindrical tube 4 is about the same as the height of the stirring blade 3.3.
The cylindrical tube 4 has a lowermost diameter D1 that is substantially the same as the rotational diameter of the excavation shaft 1.
From the lowermost end, the diameter gradually increases as it goes upward, that is, the diameter increases from the lower end to the upper side.
The portion having the largest diameter D2 is above the tapered portion, and the portion having the largest diameter D2 is tapered so that the diameter gradually decreases.
The cylindrical tube 4 is supported by support columns 13 and 13 extending from an annular ring 12 arranged around the motor 16.
The cylindrical tube 4 is formed with slits 41 so as to be separable to the left and right sides of the excavation direction.
In other words, the right portion 44 and the left portion 45 of the slit 41 can be separated from each other with the slit 41 shown in the figure as a boundary, and the diameter of the cylindrical tube 4 is increased or decreased.

<3>揺動シャフトとカムシャフト
地上に位置するリング12にはモーター7が設けられており、モーター7の下方に伸びた揺動シャフト8が回転する。
揺動シャフト8の下端には、カムシャフト9がユニバーサルジョイント10によって連結されている。
カムシャフト9の外周には、当該カムシャフト9の軸線とは軸線がズレている偏心カム11が、上下に適宜間隔離れて複数個取付られている。
これら偏心カム11の周囲を囲み、偏心カム11の偏心回転を許容する環状の揺動リング42が、円筒管4のスリット41の右側部分44から突設してある。
円筒管4のスリット41の左側部分45からは、カムシャフト9の外周を囲み、カムシャフト9の回転を許容する環状の摺接リング43が複数個突設してある。
<3> Oscillating shaft and camshaft The ring 12 located on the ground is provided with a motor 7, and an oscillating shaft 8 extending below the motor 7 rotates.
A camshaft 9 is connected to the lower end of the swing shaft 8 by a universal joint 10.
A plurality of eccentric cams 11 are attached to the outer periphery of the camshaft 9 at an appropriate distance from each other in the vertical direction.
An annular rocking ring 42 that surrounds the eccentric cam 11 and allows the eccentric cam 11 to rotate eccentrically projects from the right side portion 44 of the slit 41 of the cylindrical tube 4.
From the left side portion 45 of the slit 41 of the cylindrical tube 4, a plurality of annular sliding contact rings 43 are provided so as to surround the outer periphery of the cam shaft 9 and allow the cam shaft 9 to rotate.

続いて、上記で説明した装置を用いてソイルセメント柱を構築する方法について説明する。
<4>削孔の掘削
掘削軸1をモーターで回転して、掘削軸1の回転で下端の掘削翼2を回転させ、それに取付けられているビットによって地盤を掘削して、地中に削孔14を形成する。
Subsequently, a method for constructing a soil cement pillar using the apparatus described above will be described.
<4> Drilling of drilling hole The drilling shaft 1 is rotated by a motor, the drilling shaft 1 is rotated to rotate the drilling blade 2 at the lower end, the ground is excavated by a bit attached thereto, and the hole is drilled in the ground. 14 is formed.

<5>凝固材の注入
掘削翼2による掘削と同時に、掘削軸1の先端の注入口6から凝固材15を、削孔14の中に注入する。
実施例では、凝固材15としてセメントミルクを使用している。
掘削した土砂と凝固材15を、攪拌翼3でかき混ぜ、攪拌する。
円筒管4を進行して、徐々に直径が大きくなったテーパ状の側面によって掘削していない原土を、外周方向へ押しのける。
このようにして、掘削しない原土を円筒管4によって外周方向へ押しのけ、より大きな径の掘削孔14を形成することになる。
原土砂を外側へ押しやった分、凝固材15と攪拌された土が、大きな圧力をかける必要なく、掘削孔14の中に充填されることとなる。
<5> Injection of solidified material Simultaneously with the excavation by the excavating blade 2, the solidified material 15 is injected into the hole 14 from the injection port 6 at the tip of the excavation shaft 1.
In the embodiment, cement milk is used as the solidifying material 15.
The excavated earth and sand and the solidified material 15 are stirred with the stirring blade 3 and stirred.
Advancing through the cylindrical tube 4, the raw soil that has not been excavated is pushed away in the outer circumferential direction by the tapered side surface gradually increasing in diameter.
In this way, the unexcavated raw earth is pushed away by the cylindrical tube 4 in the outer peripheral direction, and the excavation hole 14 having a larger diameter is formed.
As the raw earth and sand are pushed outward, the solidified material 15 and the agitated soil are filled into the excavation hole 14 without the need to apply a large pressure.

<6>凝固材の注入量
本発明では、注入する凝固材(セメントミルク)15量を、円筒管4のテーパ状部分によって拡径しただけの、つまりは直径D2から直径D1を引いた体積分となるよう、予め計算で求めた量をするシステムを採用している。
従って、注入量が、円筒管4によって拡径した体積と同じだけであるから、従来のように凝固材15と掘削土が混ざった土砂が掘削軸1を伝わって地表面にあふれ出したり、軟弱な地層を伝って予定外の方向へ侵入したり、凝固材15の混合した残土の山が盛り上がるというようなことが生じない。
特に、掘削軸1周辺の地表へ盛り上がった土砂の廃棄量の多さが問題となっている現在、そのような現象が生じない本発明の経済的効果は大きい。
<6> Injection amount of solidified material In the present invention, the volume of solidified material (cement milk) 15 to be injected is simply expanded by the tapered portion of the cylindrical tube 4, that is, the volume D1 minus the diameter D1. In order to satisfy the above, a system for calculating the amount obtained in advance is adopted.
Therefore, since the injection amount is only the same as the volume expanded by the cylindrical tube 4, the soil mixed with the solidified material 15 and the excavated soil flows along the excavation shaft 1 and overflows to the ground surface as in the prior art. Therefore, it does not occur that it travels through unscheduled formations in an unplanned direction or the pile of the remaining soil mixed with the solidified material 15 rises.
In particular, the present invention in which such a phenomenon does not occur has a great economic effect at present when there is a problem of a large amount of earth and sand discarded on the ground surface around the excavation shaft 1.

<7>円筒管の拡大・縮小
掘削開始と平行して、モーター7によって揺動シャフト8を回転すると、カムシャフト9も回転し、それに取付けた偏心カム11も、揺動リング42内で偏心して回転する。
偏心カム11が偏心して回転することにより、揺動リング42もカムシャフト9に対して偏心して回転する。
揺動リング42が偏心動することにより、円筒管4のスリット41の右側部分44も前後左右動を行いスリット41の幅が大きくなったり小さくなったりし、結果的に円筒管4の直径が拡大したり、縮小したりすることになる。
円筒管4の直径が拡大することによって、原土を外周方向へしっかりと押しのける。
円筒管4の直径が縮小するときに、周辺土砂の抵抗が弱まり、常時下方に押されている円筒管4は徐々に進行する。
<7> Expansion / reduction of cylindrical tube When the swing shaft 8 is rotated by the motor 7 in parallel with the start of excavation, the cam shaft 9 is also rotated, and the eccentric cam 11 attached thereto is also eccentric in the swing ring 42. Rotate.
As the eccentric cam 11 rotates eccentrically, the swing ring 42 also rotates eccentrically with respect to the camshaft 9.
As the oscillating ring 42 moves eccentrically, the right side portion 44 of the slit 41 of the cylindrical tube 4 also moves back and forth and left and right, and the width of the slit 41 increases or decreases, resulting in an increase in the diameter of the cylindrical tube 4. Will be reduced or reduced.
By expanding the diameter of the cylindrical tube 4, the raw soil is pushed firmly in the outer circumferential direction.
When the diameter of the cylindrical tube 4 is reduced, the resistance of the surrounding soil is weakened, and the cylindrical tube 4 that is always pushed downward gradually advances.

<8>凝固材の攪拌
攪拌翼3・3によって、凝固材15と掘削土が混ざった土砂を更に攪拌して、掘削孔の中に凝固材15と掘削土が均一に分散し、それらが硬化することでソイルセメント柱が形成される。
<8> Agitation of the solidified material The earth and sand mixed with the solidified material 15 and the excavated soil are further agitated by the stirring blades 3 and 3, and the solidified material 15 and the excavated soil are uniformly dispersed in the excavation hole, and they are hardened. By doing so, a soil cement pillar is formed.

<9>掘削軸の引き抜き
予定の掘削が終了したら、掘削軸1を削孔14から引き抜く。
引き抜きには、通常、掘削とは反対方向に回転しながら引き抜く。
このとき、引き抜きながら凝固材15を注入口6から注入しながら引き抜くこともある。
<9> Pulling out the excavation shaft When the planned excavation is completed, the excavation shaft 1 is pulled out from the hole 14.
In order to pull out, it is usually pulled out while rotating in the opposite direction to the excavation.
At this time, the solidified material 15 may be extracted while being injected from the injection port 6 while being extracted.

以上の実施例では、円筒管4に一つのスリット41を設けたが、スリットはふたつ以上設けることも可能であるし、そのうちの一つのスリットは、カムを使用しないで、蝶番のようにヒンジ結合して、他方のスリットの幅が大きくなったり小さくなったりするのを許容する構造としてもよい。   In the above embodiment, one slit 41 is provided in the cylindrical tube 4. However, two or more slits can be provided, and one of the slits can be hinged like a hinge without using a cam. And it is good also as a structure which accept | permits that the width | variety of the other slit becomes large or becomes small.

ソイルセメント柱の構築装置の実施例の斜視図Perspective view of an embodiment of a soil cement pillar construction device 装置の側面図Side view of the device 円筒管の要部の斜視図Perspective view of main part of cylindrical tube 円筒管の要部の横断面Cross section of main part of cylindrical tube

符号の説明Explanation of symbols

1:掘削軸
2:掘削翼
3:攪拌翼
4:円筒管
6:注入口
7:モーター
9:カムシャフト
10:ユニバーサルジョイント
11:偏心カム
12:リング
13:支持柱
14:削孔
15:凝固材
41:スリット
42:揺動リング
43:摺接リング
44:右側部分
45:左側部分
1: Excavation shaft 2: Excavation blade 3: Stirring blade 4: Cylindrical tube 6: Injection port 7: Motor 9: Cam shaft 10: Universal joint 11: Eccentric cam 12: Ring 13: Support column 14: Drilling hole 15: Solidified material 41: Slit 42: Swing ring 43: Sliding contact ring 44: Right side portion 45: Left side portion

Claims (4)

動力によって回転する掘削軸の下端部に、凝固材注入口と掘削翼とを備えるソイルセメント柱の構築装置であって、
掘削翼よりも上方に、下端の直径よりも直径が徐々に大きくなり、少なくとも一部が下端よりも大きな径となった円筒管を配し、
前記円筒管には掘削方向に向って、その左右両側に離隔可能に少なくとも一つのスリットを形成し、
当該スリットの幅が拡大と縮小を繰り返す、
ソイルセメント柱の構築装置。
An apparatus for constructing a soil cement column including a solidified material injection port and a drilling blade at a lower end portion of a drilling shaft rotated by power,
Above the excavating blade, arrange a cylindrical tube whose diameter is gradually larger than the diameter of the lower end and at least part of which is larger than the lower end,
At least one slit is formed in the cylindrical tube so as to be separable on both the left and right sides in the excavation direction,
The width of the slit repeats expansion and reduction,
Equipment for building soil cement pillars.
動力によって回転する掘削軸の下端部に、凝固材注入口と掘削翼とを備えるソイルセメント柱の構築装置であって、
前記掘削軸とは別個に、動力によって回転するとともに、偏心カムを有する揺動シャフトを配し、
掘削翼よりも上方に、下端の直径よりも直径が徐々に大きくなり、少なくとも一部が下端よりも大きな径となった円筒管を配し、
円筒管には掘削方向の左右に離隔可能に少なくとも一つのスリットを形成し、
前記円筒管のスリットの左右いずれか一方側端に、前記偏心カムの周りを囲む揺動リングを設け、
前記円筒管のスリットの左右いずれかの他方側端に、揺動シャフトを通してなる、
ソイルセメント柱の構築装置。
An apparatus for constructing a soil cement column including a solidified material injection port and a drilling blade at a lower end portion of a drilling shaft rotated by power,
Separately from the excavation shaft, it is rotated by power, and an oscillating shaft having an eccentric cam is arranged,
Above the excavating blade, arrange a cylindrical tube whose diameter is gradually larger than the diameter of the lower end and at least part of which is larger than the lower end,
At least one slit is formed in the cylindrical tube so that it can be separated to the left and right in the excavation direction,
A swing ring surrounding the eccentric cam is provided on either the left or right side end of the slit of the cylindrical tube,
A rocking shaft is passed through the other side of the left or right side of the slit of the cylindrical tube.
Equipment for building soil cement pillars.
円筒管の下端の径は、掘削翼の回転直径とほぼ同じであって、
その上方の少なくとも一部がそれよりも大きな直径を有する、
請求項1又は2にかかるソイルセメント柱の構築装置。
The diameter of the lower end of the cylindrical tube is almost the same as the rotating diameter of the excavating blade,
At least a portion above it has a larger diameter,
The apparatus for constructing a soil cement pillar according to claim 1 or 2.
請求項1乃至は3のいずれか1項にかかるソイルセメント柱の構築装置を使用した構築方法であって、
掘削翼によって掘削した削孔の径を、円筒管の徐々に径が大きくなるテーパ部分によって拡大しながら、土砂を外側へ押しやり、
土砂を押しのけた分の凝固材と混練された流動土を充填していき、
円筒管の直径が拡大・縮小を繰り返すことで、円筒管を進行する、
ソイルセメント柱の構築方法。
A construction method using the soil cement pillar construction device according to any one of claims 1 to 3,
While expanding the diameter of the hole drilled by the excavating blade by the taper part where the diameter gradually increases,
Filled with the solidified material and kneaded fluid soil that pushed away the earth and sand,
Advances the cylindrical tube by repeatedly expanding and reducing the diameter of the cylindrical tube.
Construction method of soil cement pillar.
JP2008121159A 2008-05-07 2008-05-07 Construction device and construction method of soil cement column Pending JP2009270326A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008121159A JP2009270326A (en) 2008-05-07 2008-05-07 Construction device and construction method of soil cement column

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008121159A JP2009270326A (en) 2008-05-07 2008-05-07 Construction device and construction method of soil cement column

Publications (1)

Publication Number Publication Date
JP2009270326A true JP2009270326A (en) 2009-11-19

Family

ID=41437127

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008121159A Pending JP2009270326A (en) 2008-05-07 2008-05-07 Construction device and construction method of soil cement column

Country Status (1)

Country Link
JP (1) JP2009270326A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104762960A (en) * 2015-04-12 2015-07-08 刘玉秋 Torque-balanced mixing and drilling machine
JP2019132043A (en) * 2018-01-31 2019-08-08 昌尚 橋本 Ground improvement device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104762960A (en) * 2015-04-12 2015-07-08 刘玉秋 Torque-balanced mixing and drilling machine
JP2019132043A (en) * 2018-01-31 2019-08-08 昌尚 橋本 Ground improvement device

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