JPH11269864A - Stirring device-attached excavator - Google Patents
Stirring device-attached excavatorInfo
- Publication number
- JPH11269864A JPH11269864A JP7820898A JP7820898A JPH11269864A JP H11269864 A JPH11269864 A JP H11269864A JP 7820898 A JP7820898 A JP 7820898A JP 7820898 A JP7820898 A JP 7820898A JP H11269864 A JPH11269864 A JP H11269864A
- Authority
- JP
- Japan
- Prior art keywords
- wall
- screw blade
- pipe
- drilling
- rod
- 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.)
- Granted
Links
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、地盤を柱状に掘削
すると共に、掘削土をセメントミルクと攪拌混合して、
ソイルセメントを充填した状態の掘削孔を形成する攪拌
装置付掘削装置に関するもので、特に掘削土とセメント
ミルクの良好な混合状態が得られる攪拌装置付掘削装置
に関する。BACKGROUND OF THE INVENTION The present invention relates to a method for digging a ground into a column shape and stirring and mixing excavated soil with cement milk.
The present invention relates to an excavator with a stirrer that forms an excavation hole filled with soil cement, and more particularly to an excavator with a stirrer capable of obtaining a good mixing state of excavated soil and cement milk.
【０００２】[0002]
【従来の技術】従来、ソイルセメントを充填した状態の
掘削孔を形成する攪拌装置付掘削装置としては、掘削土
をセメントミルクと混合攪拌するために、停止翼と攪拌
翼を備えたものが知られている。2. Description of the Related Art Conventionally, as a drilling device with a stirring device for forming a drilled hole filled with soil cement, there is known a drilling device having a stop blade and a stirring blade for mixing and stirring excavated soil with cement milk. Have been.
【０００３】例えば特公昭５８−２９３７４号公報に
は、掘削翼と攪拌翼が取り付けられた掘削軸に、掘削翼
と攪拌翼の間および／または攪拌翼と攪拌翼の間に位置
し、掘削翼による掘削径より大きな径の共まわり防止翼
を、ボスを介して回転自在に装着した攪拌装置付掘削装
置が開示されている。[0003] For example, Japanese Patent Publication No. 58-29374 discloses that an excavating blade, which is located between an excavating blade and an agitating blade and / or between an agitating blade and an agitating blade, is mounted on an excavating shaft to which the excavating blade and the agitating blade are attached. There is disclosed a drilling device with a stirrer in which a co-rotation prevention blade having a diameter larger than the drilling diameter by the above is rotatably mounted via a boss.
【０００４】上記攪拌装置付掘削装置は、共まわり防止
翼を掘削孔壁に食い込ませて係止し、掘削軸を共まわり
防止翼に対して空転させることで共まわり防止翼を停止
させておき、掘削軸と共に回転する攪拌翼と共まわりし
ようとする掘削土の塊をこの停止している共まわり防止
翼で押さえ、掘削土の共まわりによるセメントミルクと
の混合不良を防止しようとするものである。In the above-described excavator with a stirring device, the co-rotation prevention blades are stopped by cutting into the wall of the drilling hole and locked, and the excavation shaft idles with respect to the co-rotation prevention blades. It is intended to hold the lump of excavated soil that is about to rotate with the stirring blade rotating with the excavation axis with the stopped anti-rotation wings to prevent poor mixing with the cement milk due to the co-rotation of the excavated soil. is there.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記従
来の攪拌装置付掘削装置の場合、攪拌翼による攪拌領域
が、攪拌翼が回転移動して掘削土を水平方向に剪断する
円形領域に限られ、広い範囲の掘削土を流動させて攪拌
することができない。つまり、攪拌翼が位置する領域の
掘削土を輪切り状に剪断攪拌するにすぎないもので、高
い攪拌効率が得にくい問題がある。また、共まわり防止
翼が掘削孔壁に食い込んだ状態で掘削軸が上げ下げされ
ることになるので、掘削孔壁が共まわり防止翼で掻き崩
されやすいという問題もある。However, in the case of the above-mentioned conventional excavator with a stirring device, the stirring region of the stirring blade is limited to a circular region where the stirring blade rotates and shears the excavated soil in the horizontal direction. A wide range of excavated soil cannot be flowed and stirred. In other words, the excavated soil in the region where the stirring blades are located is merely sheared and stirred in a ring shape, and there is a problem that it is difficult to obtain high stirring efficiency. Further, since the excavation axis is raised and lowered in a state where the co-rotation prevention wings bite into the borehole wall, there is a problem that the drilling hole walls are easily scraped by the co-rotation prevention wings.
【０００６】本発明は、上記従来の問題点にかんがみて
なされたもので、攪拌装置付掘削装置において、掘削孔
壁を保護しつつ掘削土の攪拌効率を向上させることを目
的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to improve the efficiency of excavated soil while protecting a wall of an excavation hole in an excavator with an agitator.
【０００７】[0007]
【課題を解決するための手段】このために本発明は、正
逆回転可能な掘削ロッドを中心にして囲んで、掘削され
る掘削孔とほぼ外径で、内周にスクリュ羽根を有する造
壁管が設けられており、掘削ロッドの周囲には、造壁管
内周のスクリュ羽根の内側で掘削ロッドと共に回転可能
なスクリュ羽根が設けられており、しかも掘削ロッドが
正回転される時には造壁管が共に回転し、掘削ロッドが
逆回転される時には掘削ロッドと造壁管が回転自在とな
る攪拌装置を有することを特徴とする攪拌装置付掘削装
置を提供するものである。SUMMARY OF THE INVENTION For this purpose, the present invention relates to a wall-forming structure which surrounds a drilling rod which can be rotated forward and reversely, has a substantially outer diameter with a drilling hole to be drilled, and has a screw blade on an inner periphery. A pipe is provided, and around the drilling rod, a screw blade rotatable with the drilling rod is provided inside the screw blade on the inner wall of the wall-forming pipe, and when the drilling rod is normally rotated, the wall-forming pipe is provided. The present invention provides a drilling device with a stirring device, characterized in that the drilling device has a stirring device that rotates together with the drilling rod so that the drilling rod and the wall pipe can rotate freely when the drilling rod rotates in the reverse direction.
【０００８】[0008]
【発明の実施の形態】図１〜図４に基づいて、本発明に
係る攪拌装置付掘削装置の一例を説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of an excavator with a stirrer according to the present invention will be described with reference to FIGS.
【０００９】図１は掘削ロッド１の先端部分の分解状態
を示し、図２は組み立て状態を示す。掘削ロッド１は正
・逆回転可能なもので、本体部２とヘッド部３に分割さ
れている。掘削ロッド１のヘッド部３は、本体部２に対
して着脱可能なもので、本例においては、その連結部４
を本体部２に差し込んで固定されるものとなっている。
掘削ロッド１は、本体部２とヘッド部３を一連一体とし
たものでもよいが、掘削時に損傷しやすいヘッド部３の
保守や交換を行いやすくする上で、本体部２に対してヘ
ッド部３を着脱可能としておくことが好ましい。また、
掘削ロッド１の本体部２とヘッド部３には、各々中心部
を軸方向に貫通して、掘削孔にセメントミルクを注入す
るための注入路５（図２参照）が形成されているもので
ある。FIG. 1 shows an exploded state of a tip portion of a drill rod 1, and FIG. 2 shows an assembled state. The excavating rod 1 is rotatable forward and backward, and is divided into a main body 2 and a head 3. The head portion 3 of the drilling rod 1 is detachable from the main body portion 2, and in this example, the connecting portion 4
Is inserted into the main body 2 and fixed.
The drilling rod 1 may be one in which the main body 2 and the head 3 are integrated in a series, but in order to facilitate maintenance and replacement of the head 3 that is easily damaged during excavation, the head 3 Is preferably detachable. Also,
The body part 2 and the head part 3 of the drilling rod 1 are each formed with an injection passage 5 (see FIG. 2) for axially penetrating the central part thereof and injecting the cement milk into the drilling hole. is there.
【００１０】掘削ロッド１のヘッド部３は、先端に掘削
刃６を有するもので、その先端側周囲には２条のスクリ
ュ羽根７が設けられている。この２条のスクリュ羽根７
は、それぞれ下部側（ヘッド部３の先端側）の張出幅
（ヘッド部３の外面からスクリュ羽根７の外周縁までの
間隔）が広く、上部側（ヘッド部３の後端側）に向かっ
て徐々に張出幅が狭くなった形状となっている。なお、
８は前記注入路５（図２参照）への石等の侵入を防止す
るための保護バーである。The head portion 3 of the drilling rod 1 has a drilling blade 6 at the tip, and two screw blades 7 are provided around the tip side. These two screw blades 7
Each has a large overhang width (a distance from an outer surface of the head portion 3 to an outer peripheral edge of the screw blade 7) on a lower side (a front end side of the head portion 3) and is directed toward an upper side (a rear end side of the head portion 3). The overhang width is gradually narrowed. In addition,
Reference numeral 8 denotes a protection bar for preventing stones or the like from entering the injection path 5 (see FIG. 2).
【００１１】スクリュ羽根７は、掘削刃６で掘削した掘
削土を上方へ移動させる役割の他、後述するように、掘
削土を攪拌する役割をもなすものである。このスクリュ
羽根７は、１条でもよいが、上記のように２条のスクリ
ュ羽根７を設けておくと、掘削土をより攪拌しやすく、
しかも掘削時に掘削ロッド１に加わる負荷を分散させて
掘削ロッド１を垂直に保持しやすくなるので好ましい。
また、スクリュ羽根７は３条以上とすることもできる。The screw blade 7 serves not only to move the excavated soil excavated by the excavating blade 6 upward but also to agitate the excavated soil as described later. This screw blade 7 may be a single screw. However, if two screw blades 7 are provided as described above, the excavated soil can be more easily stirred,
In addition, the load applied to the excavating rod 1 during excavation is dispersed, so that the excavating rod 1 is easily held vertically, which is preferable.
Further, the screw blade 7 may have three or more threads.
【００１２】造壁管９は、掘削ロッド１を中心にして囲
んで位置するもので、掘削刃６により掘削される掘削孔
の直径とほぼ等しい外径を有し、その内周には２条のス
クリュ羽根１０が設けられている。また、造壁管９の上
部側中心部には内管１１が設けられている。この内管１
１は、スクリュ羽根１０の造壁管９の上部側が、造壁管
９と内管１１とに亘って取り付けられていることによ
り、造壁管９に一体に保持されている。The wall pipe 9 is positioned so as to surround the drill rod 1 and has an outer diameter substantially equal to the diameter of the drill hole drilled by the drill blade 6, and has a double-walled inner circumference. Screw blade 10 is provided. Further, an inner pipe 11 is provided at a central portion on the upper side of the wall pipe 9. This inner tube 1
1 is integrally held by the wall pipe 9 because the upper side of the wall pipe 9 of the screw blade 10 is attached over the wall pipe 9 and the inner pipe 11.
【００１３】造壁管９は、掘削ロッド１のヘッド部３
が、その鍔部１２が内管１１の下端面に当接する位置ま
で下方から内管１１に差し込まれて本体部２に接続さ
れ、これによって内管１１を回転自在に貫通することに
なる掘削ロッド１に保持されるものである。また、掘削
ロッド１の本体部２の先端部には、上下方向にスライド
可能で、内蔵されたスプリング（図示されていない）に
よって下方に付勢されたスライドリング１３が設けられ
ている。スライドリング１３には直角三角形状の係合溝
１４が形成されている。この係合溝１４は、掘削ロッド
１の本体部２にヘッド部３を連結した時に、内管１１の
上端部に突出した直角三角形状の係合突出部１５と嵌り
合うものとなっている。この係合溝１４と係合突出部１
５は、掘削ロッド１が正回転する時に係合状態となり、
掘削ロッド１が逆回転すると、スライドリング１３を下
方への付勢力に逆らって上方にスライドさせつつ斜面同
士が滑り合ってすり抜けることができるものである。The wall pipe 9 is provided with the head 3 of the drill rod 1.
However, the drilling rod is inserted into the inner pipe 11 from below and connected to the main body 2 until the flange 12 comes into contact with the lower end surface of the inner pipe 11, whereby the drilling rod rotatably penetrates the inner pipe 11. 1 is held. A slide ring 13 slidable in the vertical direction and urged downward by a built-in spring (not shown) is provided at the tip of the main body 2 of the excavating rod 1. The slide ring 13 is formed with a right triangular engagement groove 14. When the head 3 is connected to the main body 2 of the drilling rod 1, the engagement groove 14 is fitted with a right triangle-shaped engagement projection 15 projecting from the upper end of the inner tube 11. The engagement groove 14 and the engagement protrusion 1
5 is engaged when the drilling rod 1 rotates forward,
When the excavating rod 1 rotates in the reverse direction, the slopes can slide and slip through each other while sliding the slide ring 13 upward against the downward urging force.
【００１４】スクリュ羽根１０が２条となっているの
は、前記スクリュ羽根７が２条であることに合わせたも
ので、スクリュ羽根７が１条の場合にはそれに合わせて
１条とし、前記スクリュ羽根７が３条以上である場合に
はそれに合わせて３条以上とすることが好ましい。ま
た、スクリュ羽根１０は、造壁管９の上部側は造壁管９
と内管１１とに亘って設けられているものであるが、造
壁管９の下部側は、前記スクリュ羽根７とは反対に、下
部側の張出幅（造壁管９内面からスクリュ羽根１０の内
周縁までの間隔）が狭く、上部側に向かって徐々に張出
幅が広くなっている。The reason why the number of the screw blades 10 is two is that the number of the screw blades 7 is two. If the number of the screw blades 7 is one, the number is one. When the number of screw blades 7 is three or more, it is preferable that the number is three or more. Further, the screw blade 10 has an upper part of the wall pipe 9 on the wall wall 9.
And the inner pipe 11, the lower side of the wall pipe 9 is opposite to the screw blade 7, and the lower side has an overhang width (from the inner surface of the wall pipe 9 to the screw blade). 10 is narrower), and the overhang width gradually increases toward the upper side.
【００１５】前記スクリュ羽根７は、内管１１から下方
に突出する掘削ロッド１のヘッド部３部分に取り付けら
れているもので、スクリュ羽根１０の造壁管９の下部側
と対応する位置に位置されるものである。このスクリュ
羽根７は、スクリュ羽根７が下部から上部に向かって張
出幅が漸減し、造壁管９下部側のスクリュ羽根１０が下
部から上部に向かって張出幅が漸増していることによ
り、スクリュ羽根１０の造壁管９下部側の内側で掘削ロ
ッド１と共に回転可能なものとなっている。つまり、掘
削ロッド１（ヘッド部３）の周囲に設けられたスクリュ
羽根７と、スクリュ羽根１０の造壁管９下部側とは、相
互にすり抜けて回転可能な形状となっている。The screw blade 7 is attached to a portion of the head portion 3 of the excavating rod 1 projecting downward from the inner pipe 11, and is located at a position corresponding to the lower side of the wall-forming tube 9 of the screw blade 10. Is what is done. The screw blade 7 has a screw blade 7 whose protrusion width gradually decreases from the lower part to the upper part, and the screw blade 10 on the lower part of the wall-forming tube 9 gradually increases the protrusion width from the lower part to the upper part. The screw blade 10 is rotatable together with the excavating rod 1 inside the lower part of the wall pipe 9. In other words, the screw blade 7 provided around the excavating rod 1 (head portion 3) and the lower part of the wall-forming tube 9 of the screw blade 10 are mutually rotatable.
【００１６】上記掘削ロッド１（ヘッド部３）の周囲に
設けられたスクリュ羽根７と、スクリュ羽根１０の造壁
管９下部側とについてさらに説明すると、本例における
スクリュ羽根７とスクリュ羽根１０の下部側は、特に図
２に示されるように、一枚のスクリュ羽根を、相互にす
り抜けながら回転可能な外周側（スクリュ羽根１０の造
壁管９下部側）と内周側（スクリュ羽根７）に分割した
形状をなしているものである。スクリュ羽根７とスクリ
ュ羽根１０の造壁管９下部側とは、一枚のスクリュ羽根
を同心円状に二枚に分割した形状とすることもできる
が、本例のように、外周側と内周側の各スクリュ羽根
７，９の張出幅を周方向に変化させて分割した形状とす
ると、後述するように、攪拌できる範囲が広がることか
ら好ましい。また、本例のようにスクリュ羽根７，９の
張出幅を漸減または漸増させる分割の他、波線状に分割
することでも、スクリュ羽根７．９の張出幅を周方向に
変化させることができる。The screw blades 7 provided around the excavating rod 1 (head portion 3) and the lower part of the wall pipe 9 of the screw blades 10 will be further described. As shown in FIG. 2 in particular, the lower side includes an outer peripheral side (the lower side of the wall-forming tube 9 of the screw blade 10) and an inner peripheral side (the screw blade 7) that can rotate while passing through one screw blade. The shape is divided into two. The screw blade 7 and the lower part of the wall pipe 9 of the screw blade 10 may be formed by concentrically dividing one screw blade into two pieces. However, as in this example, the outer circumference and the inner circumference are different. It is preferable that the width of each of the screw blades 7 and 9 on the side is changed in the circumferential direction so as to be divided, as described later, because the range in which stirring can be performed is widened. In addition to the division in which the overhang width of the screw blades 7 and 9 is gradually reduced or gradually increased as in this example, the overhang width of the screw blade 7.9 can be changed in the circumferential direction by dividing it in a wavy line. it can.
【００１７】次に、図３および図４に基づいて、図１お
よび図２で説明した装置の作動状態について説明する。Next, an operation state of the apparatus described with reference to FIGS. 1 and 2 will be described with reference to FIGS.
【００１８】まず、図３に示されるように、スクリュ羽
根７とスクリュ羽根１０の造壁管９下部側とが合わさっ
た状態で掘削ロッド１を正回転させ、係合溝１４と係合
突出部１５の係合によって、造壁管９を掘削ロッド１と
共に回転させながら、掘削刃６によって必要な深さの掘
削孔を掘削する。造壁管９は、その外径が掘削刃６によ
って掘削される掘削孔の径とほぼ等しいことから、掘削
孔に嵌り合った状態で回転し、掘削孔壁１６を均しつつ
前進することになる。また、スクリュ羽根７，９は、掘
削面付近から掘削土を上部へ移動させて掘削を助ける役
割をなすが、スクリュ羽根７とスクリュ羽根１０の造壁
管９下部側とが合わさった状態で、両者間の隙間は小さ
いもので済むことから、この掘削土の搬送作用も妨げら
れることがない。First, as shown in FIG. 3, the excavating rod 1 is rotated forward in a state where the screw blade 7 and the lower part of the wall-forming tube 9 of the screw blade 10 are engaged with each other, so that the engagement groove 14 and the engagement protrusion are formed. By the engagement of 15, the drilling hole 6 is drilled by the drilling blade 6 while rotating the wall pipe 9 together with the drilling rod 1. Since the outer diameter of the wall pipe 9 is substantially equal to the diameter of the drill hole drilled by the drill blade 6, the wall pipe 9 rotates while fitting into the drill hole and moves forward while leveling the drill hole wall 16. Become. The screw blades 7 and 9 move the excavated soil upward from the vicinity of the excavation surface and assist in excavation. However, when the screw blade 7 and the lower part of the wall pipe 9 of the screw blade 10 are fitted together, Since only a small gap is required between the two, the conveying action of the excavated soil is not hindered.
【００１９】必要な深さの掘削孔を形成した後、掘削ロ
ッド１を逆回転させつつ、注入路５（図２参照）からセ
メントミルクを掘削孔内に注入する。掘削ロッド１が逆
回転すると、造壁管９が掘削孔に嵌り込んで回転抵抗が
加わっていることから、係合溝１４と係合突出部１５
が、スライドリング１３を上方にスライドさせつつ互い
にすり抜け、造壁管９の回転が押えられた状態で掘削ロ
ッド１のみが逆回転する。従って、掘削ロッド１のスク
リュ羽根７の周囲に掘削土の塊がまとわり付いていたと
しても、回転が押えられている造壁管９内周のスクリュ
羽根１０に当たることにより、スクリュ羽根７と共まわ
りしてしまうことが防止される。また、掘削ロッド１を
逆回転させた時の造壁管９の回転防止は、上記のよう
に、造壁管９の外周面と掘削孔壁１６間の接触抵抗によ
るものであるので、掘削孔壁１６を傷付けて崩壊させる
心配がない。After the drilling hole having a required depth is formed, cement milk is injected into the drilling hole from the injection passage 5 (see FIG. 2) while the drilling rod 1 is rotated in the reverse direction. When the excavation rod 1 rotates in the reverse direction, the wall 9 is fitted into the excavation hole and rotation resistance is applied.
However, the slide ring 13 slides upward while slipping through each other, and only the excavating rod 1 rotates in the reverse direction in a state where the rotation of the wall-forming tube 9 is suppressed. Therefore, even if a lump of excavated soil is stuck around the screw blade 7 of the excavating rod 1, the screw blade 7 is brought into contact with the screw blade 10 on the inner periphery of the wall-forming pipe 9 whose rotation is suppressed. It is possible to prevent co-rotation. In addition, the rotation prevention of the wall pipe 9 when the drill rod 1 is reversely rotated is based on the contact resistance between the outer peripheral surface of the wall pipe 9 and the wall 16 of the drill hole as described above. There is no worry that the wall 16 will be damaged and collapsed.
【００２０】ところで、図３と、図３の状態から掘削ロ
ッド１を９０度逆回転させた状態の図４とから分かるよ
うに、造壁管９の回転が押えられた状態で掘削ロッド１
が逆回転されると、停止している造壁管９内周のスクリ
ュ羽根１０と、掘削ロッド１と共に回転するスクリュ羽
根７とによって、掘削土が上下に剪断されつつ攪拌され
ることになる。従って、上下に広い層の掘削土を流動化
させて攪拌することができる。特に本例のように、スク
リュ羽根７，１０の張出幅が周方向に変化していると、
切削土の剪断位置が平面方向に経時的に変化することに
なり、上下方向のみならず横方向の攪拌を図ることもで
きる。By the way, as can be seen from FIG. 3 and FIG. 4 in which the excavating rod 1 is rotated 90 degrees in reverse from the state in FIG.
Is reversely rotated, the excavated soil is agitated while being sheared up and down by the screw blade 10 on the inner periphery of the wall-forming tube 9 that is stopped and the screw blade 7 that rotates together with the excavating rod 1. Therefore, it is possible to fluidize and stir the excavated soil in a wide layer vertically. In particular, as in this example, when the overhang width of the screw blades 7 and 10 changes in the circumferential direction,
Since the shearing position of the cutting soil changes with time in the plane direction, the stirring can be performed not only in the vertical direction but also in the horizontal direction.
【００２１】このようにして切削土を攪拌してセメント
ミルクと合わせてソイルセメント化しつつ、徐々に掘削
ロッド１および造壁管９を引き上げる。この掘削ロッド
１の引き上げに際して、逆回転しているスクリュ羽根７
は、掘削ロッド１および造壁管９と共に持ち上げられよ
うとするソイルセメントを押し戻す働きをなすものでも
ある。この押し戻し力を高めるためには、掘削ロッド１
の本体部２の下端付近に、スクリュ羽根７，９と同じ捻
じれ方向のスクリュ羽根（図示されていない）を設けて
もよい。The drilling rod 1 and the wall-forming tube 9 are gradually pulled up while the cutting soil is stirred and combined with the cement milk to form soil cement. When the drill rod 1 is pulled up, the screw blade 7 rotating in the reverse direction is rotated.
Also serves to push back the soil cement that is about to be lifted with the drill rod 1 and the wall pipe 9. In order to increase this pushing back force, the drill rod 1
A screw blade (not shown) having the same twisting direction as the screw blades 7 and 9 may be provided near the lower end of the main body 2.
【００２２】なお、ソイルセメントで満たされた掘削孔
を形成した後は、そのままソイルセメントを硬化させて
地盤強化を図ってもよいが、さらに杭を沈設した後にソ
イルセメントを硬化させると、一層強固な地盤強化を図
ることができる。After the excavation hole filled with the soil cement is formed, the soil cement may be hardened as it is to strengthen the ground. However, if the soil cement is hardened after the pile is further laid, the soil cement is further strengthened. It is possible to strengthen the ground.
【００２３】[0023]
【発明の効果】本発明は、以上説明した通りのものであ
り、次の効果を奏するものである。The present invention is as described above, and has the following effects.
【００２４】（１）停止している造壁管９内周のスクリ
ュ羽根１０と、掘削ロッド１と共に回転するスクリュ羽
根７とによって、掘削土を上下に剪断しつつ攪拌するこ
とができ、上下に広い層の掘削土を流動化させて攪拌で
きるので、掘削土の攪拌効率かよい。(1) The screw blades 10 on the inner periphery of the wall-forming tube 9 that are stopped and the screw blades 7 that rotate together with the excavating rod 1 can agitate the excavated soil while shearing it up and down. Since the excavated soil in a wide layer can be fluidized and stirred, the excavated soil can be efficiently stirred.
【００２５】（２）掘削ロッド１を逆回転させた時の造
壁管９の回転防止は、造壁管９の外周面と掘削孔壁１６
間の接触抵抗によるので、掘削孔壁１６を傷付けて崩壊
させる心配がない。従って、掘削孔壁１６の崩壊によ
り、掘削土とセメントミルクの混合不良を生じたり、杭
の沈設を行う場合に杭が挿入しにくくなったりすること
がない。(2) The rotation of the wall pipe 9 when the drill rod 1 is rotated in the reverse direction is prevented by the outer peripheral surface of the wall pipe 9 and the wall 16 of the drill hole.
Because of the contact resistance between them, there is no risk of damaging and collapsing the borehole wall 16. Therefore, the collapse of the excavation hole wall 16 does not cause poor mixing of the excavated soil and the cement milk, and does not make it difficult to insert the pile when the pile is laid.
【図１】本発明に係る攪拌装置付掘削装置の一例におけ
る掘削ロッドの先端部分の分解状態を示す図である。FIG. 1 is a diagram showing a disassembled state of a tip portion of a drilling rod in an example of a drilling device with a stirring device according to the present invention.
【図２】図１に示される掘削ロッドの先端部分の組み立
て状態を示す図である。FIG. 2 is a view showing an assembled state of a distal end portion of the excavating rod shown in FIG.
【図３】図１および図２に示される攪拌装置付掘削装置
の作動状態の説明図である。FIG. 3 is an explanatory diagram of an operation state of the excavator with a stirring device shown in FIGS. 1 and 2;
【図４】図３の状態から掘削ロッドを９０度逆回転させ
た状態を示す図である。FIG. 4 is a view showing a state in which the excavating rod is reversely rotated by 90 degrees from the state shown in FIG. 3;
１ 掘削ロッド ２ 掘削ロッドの本体部 ３ 掘削ロッドのヘッド部 ４ 連結部 ５ 注入路 ６ 掘削刃 ７ スクリュ羽根（掘削ロッド側） ８ 保護バー ９ 造壁管 １０ スクリュ羽根（造壁管側） １１ 内管 １２ 鍔部 １３ スライドリング １４ 係合溝 １５ 係合突出部 １６ 掘削孔壁 DESCRIPTION OF SYMBOLS 1 Drilling rod 2 Drilling rod main body 3 Drilling rod head 4 Connecting part 5 Injection path 6 Drilling blade 7 Screw blade (Drilling rod side) 8 Protection bar 9 Wall pipe 10 Screw blade (wall pipe side) 11 Inside Pipe 12 Flange 13 Slide ring 14 Engagement groove 15 Engagement protrusion 16 Drilling hole wall
Claims (4)
囲んで、掘削される掘削孔とほぼ等しい外径で、内周に
スクリュ羽根を有する造壁管が設けられており、掘削ロ
ッドの周囲には、造壁管内周のスクリュ羽根の内側で掘
削ロッドと共に回転可能なスクリュ羽根が設けられてお
り、しかも掘削ロッドが正回転される時には造壁管が共
に回転し、掘削ロッドが逆回転される時には掘削ロッド
と造壁管が回転自在となる攪拌装置を有することを特徴
とする攪拌装置付掘削装置。A wall pipe having an outer diameter substantially equal to a drilled hole to be drilled and having a screw blade on an inner periphery is provided around a drill rod which can be rotated forward and backward. Around the wall, there are screw blades that can rotate together with the drilling rod inside the screw blade on the inner wall of the wall pipe, and when the drill rod is rotated forward, the wall pipe rotates together and the drill rod rotates in reverse. A drilling device with a stirring device, characterized in that the drilling device has a stirring device that enables the drilling rod and the wall pipe to rotate freely when the drilling is performed.
が、造壁管内周の上部側のスクリュ羽根が造壁管と内管
とに亘って取り付けられていることによって造壁管に一
体に保持されており、この内管を掘削ロッドが回転自在
に貫通していると共に、内管から造壁管の下部側内に突
出した掘削ロッドの周囲に、造壁管内周の下部側のスク
リュ羽根の内側で回転可能なスクリュ羽根が設けられて
いることを特徴とする請求項１の攪拌装置付掘削装置。2. An inner pipe located at a central portion on an upper side of a wall pipe, wherein a screw blade on an upper side of an inner periphery of the wall pipe is attached across the wall pipe and the inner pipe. The drilling rod is rotatably penetrated through the inner pipe, and the lower side of the inner wall of the wall pipe is formed around the drill rod protruding from the inner pipe into the lower side of the wall pipe. The excavator with a stirring device according to claim 1, further comprising a screw blade rotatable inside said screw blade.
ロッドのスクリュ羽根と対応する位置にある造壁管のス
クリュ羽根とが、一枚のスクリュ羽根を、相互にすり抜
けながら回転可能な外周側と内周側に分割した形状であ
ることを特徴とする請求項１または２の攪拌装置付掘削
装置。3. A screw blade of a drilling rod and a screw blade of a wall-walled tube at a position corresponding to the screw blade of the drilling rod are rotatable while slipping through one screw blade with each other. The excavator with a stirring device according to claim 1 or 2, wherein the excavator has a shape divided on an inner peripheral side.
の各スクリュ羽根の張出幅を周方向に変化させて分割し
た形状であることを特徴とする請求項３の攪拌装置付掘
削装置。4. A stirrer according to claim 3, wherein one screw blade is divided by changing the overhang width of each screw blade on the outer peripheral side and the inner peripheral side in the circumferential direction. Drilling rig.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07820898A JP3648045B2 (en) | 1998-03-26 | 1998-03-26 | Excavator with agitator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07820898A JP3648045B2 (en) | 1998-03-26 | 1998-03-26 | Excavator with agitator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11269864A true JPH11269864A (en) | 1999-10-05 |
| JP3648045B2 JP3648045B2 (en) | 2005-05-18 |
Family
ID=13655631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07820898A Expired - Fee Related JP3648045B2 (en) | 1998-03-26 | 1998-03-26 | Excavator with agitator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3648045B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006307628A (en) * | 2005-03-31 | 2006-11-09 | Tenox Corp | Column replacing construction method and replacing column |
| JP2017106187A (en) * | 2015-12-08 | 2017-06-15 | 株式会社トーヨーアサノ | Rotary cap, precast pile burying device, and pile foundation structure construction method |
-
1998
- 1998-03-26 JP JP07820898A patent/JP3648045B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006307628A (en) * | 2005-03-31 | 2006-11-09 | Tenox Corp | Column replacing construction method and replacing column |
| JP2017106187A (en) * | 2015-12-08 | 2017-06-15 | 株式会社トーヨーアサノ | Rotary cap, precast pile burying device, and pile foundation structure construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3648045B2 (en) | 2005-05-18 |
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