JPH08319614A - Chemical injection device - Google Patents
Chemical injection deviceInfo
- Publication number
- JPH08319614A JPH08319614A JP12641395A JP12641395A JPH08319614A JP H08319614 A JPH08319614 A JP H08319614A JP 12641395 A JP12641395 A JP 12641395A JP 12641395 A JP12641395 A JP 12641395A JP H08319614 A JPH08319614 A JP H08319614A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- rod
- injection pipe
- injection
- 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.)
- Granted
Links
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は薬液注入装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chemical injection device.
【０００２】[0002]
【従来技術とその問題点】本出願人は先に特公平６−８
５２９号公報にみられるように、地盤内に所定深度まで
貫入した挿入管の側壁より噴射管を進退させる形式の薬
液注入装置を提案した。この薬液注入装置によれば、一
回の施工によって挿入管と同心の円の軌跡上で連続化さ
れた複数個の球状部よりなる拡大された地盤改良部を形
成でき、施工能率を向上できる。2. Description of the Related Art The applicant of the present invention has previously proposed Japanese Patent Publication 6-8.
As disclosed in Japanese Patent No. 529, there has been proposed a chemical injection device of a type in which an injection pipe is advanced and retracted from a side wall of an insertion pipe that penetrates into the ground to a predetermined depth. According to this chemical liquid injector, it is possible to form an enlarged ground improvement portion composed of a plurality of spherical portions that are continuous on the locus of a circle that is concentric with the insertion tube by a single construction, and it is possible to improve construction efficiency.
【０００３】ところが上記薬液注入装置においては、噴
射管として可撓性管を使用するような構成になっている
ので、噴射管が地盤内への進出時に固い地層に突き当た
るとその可撓性により向きを変えてしまう虞れがあり、
方向性があまりよくなく、施工の信頼性の面で一抹の不
安があった。However, in the above-mentioned chemical liquid injector, since a flexible pipe is used as the injection pipe, when the injection pipe hits a solid stratum when advancing into the ground, it is oriented by its flexibility. May change the
The direction was not so good, and there was some concern about the reliability of the construction.
【０００４】本発明はこのような先発明の問題点を一掃
することを目的としてなされたものである。The present invention has been made for the purpose of eliminating such problems of the prior invention.
【０００５】[0005]
【問題点を解決するための手段】本発明は、改良対象の
地盤内に所定深度まで貫入されるケーシングパイプ、上
記ケーシングパイプ内に上下動可能に挿入支持された上
下動操作用ロッド、上記ロッドの下端に一体に接続され
た曲げ加工可能な剛性噴射管、及び上記ケーシングパイ
プ内の下部に固定設置された管ベンダーを備え、上記噴
射管は、上記ロッド操作による下動時には、上記管ベン
ダーにより縦方向から横方向への曲げ加工を受けながら
上記ケーシングパイプの側壁の出入口を通り地盤内に向
け進出し、上記ロッド操作による上動時には、上記管ベ
ンダーにより横方向から縦方向への曲げ加工を受けなが
らケーシングパイプ内に退去する構成とされている、こ
とを特徴とする薬液注入装置に係る。DISCLOSURE OF THE INVENTION The present invention is directed to a casing pipe that penetrates into the ground to be improved to a predetermined depth, a vertically moving rod inserted and supported in the casing pipe so as to be vertically movable, and the rod. A bendable rigid injection pipe integrally connected to the lower end of the casing pipe, and a pipe bender fixedly installed in the lower part of the casing pipe, and the injection pipe is moved by the pipe bender when moving downward by the rod operation. While undergoing bending from the vertical direction to the horizontal direction, it advances toward the ground through the entrance and exit of the side wall of the casing pipe, and when moving upward by the rod operation, bends from the horizontal direction to the vertical direction by the pipe bender. The present invention relates to the chemical liquid injector, which is configured to retreat into the casing pipe while receiving the chemical liquid.
【０００６】[0006]
【実施例】以下に本発明の一実施例を添附図面にもとづ
き説明すると次の通りである。An embodiment of the present invention will be described below with reference to the accompanying drawings.
【０００７】本発明薬液注入装置は、図１，２に概略的
に示す全体図から明らかなようにケーシングパイプ１、
上下動操作用ロッド２、剛性噴射管３及び管ベンダー４
を構成要素として備えている。The chemical liquid injector of the present invention has a casing pipe 1, as is apparent from the overall views schematically shown in FIGS.
Vertical movement operation rod 2, rigid injection pipe 3, and pipe bender 4
Is provided as a component.
【０００８】ケーシングパイプ１は改良対象の地盤ａ内
に所定深度まで貫入が可能であり、この貫入は、地盤ａ
に予め形成の削孔内への貫入であってもあるいはケーシ
ングパイプ１自身の削孔案内で貫入するようにしてもよ
い。The casing pipe 1 is capable of penetrating into the ground a to be improved up to a predetermined depth.
In addition, it may be inserted into a preliminarily formed hole, or may be penetrated by the hole guide of the casing pipe 1 itself.
【０００９】図１，２には後者の場合が示され、ケーシ
ングパイプ１には、削孔のための付属装置、例えば公知
の削孔用ロッドと同様に、先端ビット１ａ、回転付与機
構１ｂ、削孔水供給導管１ｃ、スイベル１ｄ及び逆止弁
１ｅが備えられている。The latter case is shown in FIGS. 1 and 2, in which the casing pipe 1 has a tip bit 1a, a rotation imparting mechanism 1b, similar to an accessory device for drilling, for example, a known drilling rod. A drilling water supply conduit 1c, a swivel 1d, and a check valve 1e are provided.
【００１０】上下動操作用ロッド２は、ケーシングパイ
プ１内に好ましくは同心状に挿入され、この挿入状態に
おいて、上記パイプ１内に固設の支持部材５により支持
されている。支持部材５には、削孔水の通孔５ａが形成
されている。The vertical movement operation rod 2 is preferably concentrically inserted into the casing pipe 1 and, in this inserted state, is supported by a fixed support member 5 in the pipe 1. A through hole 5a for drilling water is formed in the support member 5.
【００１１】上記ロッド２は地上部において上下駆動装
置（図示せず）の適用により所定の許容巾で、上下方向
に移動操作できるようになっている。The rod 2 can be moved and moved in the vertical direction with a predetermined allowable width by applying a vertical drive device (not shown) on the ground.
【００１２】上記ロッド２は薬液供給用として利用で
き、薬液としてゲルタイムの比較的長いものを用いる場
合は単管が、また比較的短いものを用いる場合は、Ａ，
Ｂ２液の個別供給が可能な２重管が用いられる。図１，
２では後者の２重管構成（図３参照）のものが示され、
内外管２ａ，２ｂにそれぞれＡ，Ｂ２液の供給ホース６
ａ，６ｂが取付けられている。The rod 2 can be used for supplying a chemical liquid, and a single pipe is used when a chemical liquid having a relatively long gel time is used and A, when a chemical liquid having a relatively short gel time is used.
A double pipe capable of individually supplying the B2 solution is used. Figure 1
2 shows the latter double tube configuration (see FIG. 3),
Supply hoses 6 for A and B2 liquids to the inner and outer pipes 2a and 2b, respectively.
a and 6b are attached.
【００１３】またロッド２は下端に接続の剛性噴射管３
を管ベンダー４内に強制的に押し込み曲げ加工するため
に高強度を有していることが必要であり、例えば鋼製の
ものが用いられる。The rod 2 has a rigid injection pipe 3 connected to the lower end.
It is necessary to have high strength in order to forcibly press and bend into the pipe bender 4, and for example, one made of steel is used.
【００１４】本発明において、噴射管３としては、地盤
内進出時の方向性をよくするために特に剛性のものが用
いられる。In the present invention, as the injection pipe 3, a particularly rigid one is used in order to improve the directionality when advancing into the ground.
【００１５】剛性噴射管３は一回の施工で少なくとも２
０〜３０回程度の曲げ加工を受けるので、繰返しの曲げ
加工に耐え得るような材質のものを用いることが必要で
あり、例えば冷間引抜鋼管、ステンレス管などの鋼製の
ものが用いられる。The rigid injection pipe 3 has at least two pipes in one construction.
Since it is bent about 0 to 30 times, it is necessary to use a material that can withstand repeated bending. For example, a cold drawn steel pipe, a stainless steel pipe, or the like is used.
【００１６】鋼製の噴射管３は少なくとも５０回程度の
曲げ加工に耐え得ることができる。その他、銅，銅合金
など繰返しの曲げ加工が可能な金属製のものを用い得
る。The steel injection pipe 3 can withstand bending of at least 50 times. In addition, a metal such as copper or copper alloy that can be repeatedly bent can be used.
【００１７】上記噴射管３は通常は１本の噴射通路を備
えていればよいが、特に瞬結タイプの薬液を用いる場合
には、Ａ，Ｂ２液を噴射口まで個別に送ることのでき
る、例えば２重管構成のものを用いることが適当であ
る。The above-mentioned injection pipe 3 usually has only one injection passage. However, when using a quick-injection type chemical liquid, A and B2 liquids can be individually sent to the injection port. For example, it is suitable to use a double tube structure.
【００１８】また噴射管３は図１即ち、ケーシングパイ
プ１内への退去状態を基準にして、上部がロッド２と同
軸の直線部３Ａ、また下部が所定の曲率で湾曲する曲線
３Ｂから構成され、曲線部３Ｂの下端部はケーシングパ
イプ１の側壁の出入口７内にフリーに挿入されている。
出入口７の通路７ａは、曲線部３Ｂと略々同じ曲率で曲
がっている。The injection pipe 3 is composed of a straight line portion 3A coaxial with the rod 2 and a curved line 3B having a predetermined curvature at the lower portion, with reference to FIG. The lower end of the curved portion 3B is freely inserted into the inlet / outlet 7 of the side wall of the casing pipe 1.
The passage 7a of the doorway 7 is bent with substantially the same curvature as the curved portion 3B.
【００１９】管ベンダー４は、噴射管３をその上下動作
につれ曲げ加工するためのものであり、図１，２ではケ
ーシングパイプ１内に多段設置された左右の加工ロール
４ａ，４ａから構成した場合が示されている。The pipe bender 4 is for bending the injection pipe 3 as it moves up and down, and in FIGS. 1 and 2, it is composed of left and right processing rolls 4a, 4a arranged in multiple stages in the casing pipe 1. It is shown.
【００２０】左右の加工ロール４ａ，４ａは図４に示す
ようにその周溝４ａ1 ，４ａ1 において噴射管３を左右
両側から挟さむように、噴射管３の直線部３Ａから曲線
部３Ｂにかけて多段設置されている。この多段設置状態
において、各段の加工ロール４ａの回転中心上を通る２
本の延長線Ｌ1 ，Ｌ2 は図５に示すように噴射管３の中
心軸線Ｌ3 と平行している。As shown in FIG. 4, the left and right processing rolls 4a, 4a are multi-staged from the straight portion 3A to the curved portion 3B of the injection pipe 3 so as to sandwich the injection pipe 3 from the left and right sides in the circumferential grooves 4a 1 , 4a 1 . is set up. In this multi-stage installation state, 2 which passes over the rotation center of the processing roll 4a of each stage
The extension lines L 1 and L 2 of the book are parallel to the central axis L 3 of the injection pipe 3 as shown in FIG.
【００２１】本発明装置を用いて薬注を実施するに際し
ては、図１に示すようにロッド２を上動位置に保持した
状態、即ち噴射管３の先端部をケーシングパイプ１の側
壁の出入口７内に退去させた状態で、ケーシングパイプ
１をロッド２とともに、上記パイプ１の削孔案内のもと
に改良対象の地盤ａ内に所定深度まで貫入する。When carrying out the chemical injection using the apparatus of the present invention, as shown in FIG. 1, the rod 2 is held in the upward movement position, that is, the tip of the injection pipe 3 is connected to the inlet / outlet 7 of the side wall of the casing pipe 1. In a state where the casing pipe 1 is moved inward, the casing pipe 1 and the rod 2 are penetrated into the ground a to be improved up to a predetermined depth based on the drilling guide of the pipe 1.
【００２２】ケーシングパイプ１及びロッド２が所定深
度に達した後は、該パイプ１の貫入を停止し、次いで図
２に示すようにロッド２を上下駆動手段例えばジャッキ
（図示せず）の適用下に上動位置から下方に向け押し下
げると、ロッド２の下端に接続している噴射管３は該ロ
ッド３の押し下げにつれ下動し、下動中管ベンダー４を
構成している各段の加工ロール４ａ，４ａ間を通過し曲
げ加工を受け向きを縦方向から横方向に変えながらケー
シングパイプ１の側壁の出入口７を通り地盤ａ内に進出
して行く。After the casing pipe 1 and the rod 2 reach a predetermined depth, the penetration of the pipe 1 is stopped, and then the rod 2 is moved up and down as shown in FIG. 2 by applying a vertical driving means such as a jack (not shown). When pushed downward from the upward movement position, the injection pipe 3 connected to the lower end of the rod 2 moves downward as the rod 3 is pushed down, and the processing rolls of each stage constituting the downward moving pipe bender 4 are formed. While passing through between 4a and 4a, the bending process is changed from the vertical direction to the horizontal direction, and goes through the entrance / exit 7 of the side wall of the casing pipe 1 to advance into the ground a.
【００２３】噴射管３は例えば鋼製であり剛性を有して
いるので、地盤ａ内への進出中、仮に硬い地層に突き当
ることがあっても該地層中を向きを変えることなしに突
き進んで行くことができる。Since the injection pipe 3 is made of, for example, steel and has rigidity, even if it hits a hard formation during the advance into the ground a, the injection pipe 3 advances without changing its direction in the formation. You can go by.
【００２４】ロッド２の押し下げにより、噴射管３を地
盤ａ内に進出させた後は、ロッド２の中空部から送られ
てくる薬液を噴射管３を通じ地盤ａ内に注入することに
より、該噴射管３の先端噴口３ａを中心としてその付近
に地盤改良部Ａを形成できる。After the injection pipe 3 is advanced into the ground a by pushing down the rod 2, the chemical liquid sent from the hollow portion of the rod 2 is injected into the ground a through the injection pipe 3 to inject the liquid. A ground improvement portion A can be formed around the tip injection port 3a of the pipe 3 in the vicinity thereof.
【００２５】地盤改良部Ａを形成した後は、ロッド２の
中空部及び噴射管３内に非固結性液剤例えば削孔水を供
給し、洗浄再生する。この洗浄再生はゲルタイムの長い
薬液を用いる場合は省略できる。ロッド２及び噴射管３
の洗浄再生を終えた後は、ロッド２を上下駆動装置例え
ばジャッキの適用により図１の上動位置に復帰させる。
ロッド２の上動につれ、噴射管３は管ベンダー４内を下
端から上方に向け通過し、この通過中、横方向から縦方
向に曲げ加工を受け、図１に示す退去状態に復帰するこ
とができる。After forming the ground improvement portion A, a non-consolidating liquid agent such as drilling water is supplied into the hollow portion of the rod 2 and the injection pipe 3 to wash and regenerate. This washing regeneration can be omitted when a chemical solution having a long gel time is used. Rod 2 and injection pipe 3
After the cleaning and regeneration of (1) is completed, the rod 2 is returned to the upper moving position in FIG.
As the rod 2 moves upward, the injection pipe 3 passes through the pipe bender 4 from the lower end upward, and during this passage, the injection pipe 3 may be bent from the horizontal direction to the vertical direction to return to the retracted state shown in FIG. it can.
【００２６】図１の状態に復帰させた後は、ケーシング
パイプ１及びロッド２を回転付与機構１ｂの作動をして
例えば９０°回転し、この位置で再び先と同じ要領で薬
注を行い、以下同様にトータルで４回薬注を行うことに
より、ケーシングパイプ１の周りに３６０°全範囲に亘
って地盤改良部を形成できる。After returning to the state shown in FIG. 1, the casing pipe 1 and the rod 2 are rotated by, for example, 90 ° by operating the rotation imparting mechanism 1b, and chemical injection is performed again at this position in the same manner as above. Similarly, by performing the chemical injection four times in total, the ground improvement portion can be formed around the casing pipe 1 over the entire 360 ° range.
【００２７】同一平面内における薬注を終えた後は、ケ
ーシングパイプ１及びロッド２をステップアップしつつ
薬注を繰返すことにより、地盤改良部を上下方向に連続
させることができる。After finishing the chemical injection in the same plane, by repeating the chemical injection while stepping up the casing pipe 1 and the rod 2, the ground improvement part can be made continuous in the vertical direction.
【００２８】本発明において、噴射管３は必ずしもシン
グルタイプである必要はなく、図６に示すようにダブル
タイプであってもよい。この場合、加工ロール４ａとし
てもダブルタイプのものが用いられる。In the present invention, the injection pipe 3 does not necessarily have to be a single type, but may be a double type as shown in FIG. In this case, a double type roll is also used as the processing roll 4a.
【００２９】[0029]
【発明の効果】本発明によれば、剛性の噴射管を用い、
該噴射管を管ベンダーによる曲げ加工により、ケーシン
グパイプの側壁から進退させるような構成にしたので、
噴射管の地盤内進出時における方向性がよくなり施工の
信頼性を向上できる。According to the present invention, a rigid injection pipe is used,
Since the injection pipe is bent by a pipe bender so as to move back and forth from the side wall of the casing pipe,
The directionality of the injection pipe when it advances into the ground is improved and the reliability of construction can be improved.
【図１】本発明の１実施例を示す噴射管退去状態の一部
縦断面図である。FIG. 1 is a partial vertical cross-sectional view showing a state in which an injection pipe has withdrawn according to an embodiment of the present invention.
【図２】同、噴射管進出状態の一部縦断面図である。FIG. 2 is a partial vertical cross-sectional view of the injection pipe advancing state.
【図３】２重管構成の中空ロッドの断面図である。FIG. 3 is a cross-sectional view of a hollow rod having a double pipe structure.
【図４】加工ロールの説明図である。FIG. 4 is an explanatory diagram of a processing roll.
【図５】管ベンダーの拡大図である。FIG. 5 is an enlarged view of a tube bender.
【図６】ダブルタイプの噴射管を加工ロールとともに示
す説明図である。FIG. 6 is an explanatory view showing a double type injection pipe together with a processing roll.
１ ケーシングパイプ ２ ロッド ３ 噴射管 ４ 管ベンダー ５ 支持部材 ６ａ 供給ホース ６ｂ 供給ホース ７ 出入口 1 Casing Pipe 2 Rod 3 Injection Pipe 4 Pipe Bender 5 Supporting Member 6a Supply Hose 6b Supply Hose 7 Doorway
Claims (4)
れるケーシングパイプ、 上記ケーシングパイプ内に上下動可能に挿入支持された
上下動操作用ロッド、 上記ロッドの下端に一体に接続された曲げ加工可能な剛
性噴射管、及び上記ケーシングパイプ内の下部に固定設
置された管ベンダーを備え、 上記噴射管は、上記ロッド操作による下動時には、上記
管ベンダーにより縦方向から横方向への曲げ加工を受け
ながら上記ケーシングパイプの側壁の出入口を通り地盤
内に向け進出し、上記ロッド操作による上動時には、上
記管ベンダーにより横方向から縦方向への曲げ加工を受
けながらケーシングパイプ内に退去する構成とされてい
る、ことを特徴とする薬液注入装置。1. A casing pipe that penetrates into a ground to be improved to a predetermined depth, a vertically moving operation rod inserted and supported in the casing pipe so as to be vertically movable, and a bend integrally connected to a lower end of the rod. It is equipped with a workable rigid injection pipe and a pipe bender fixedly installed in the lower part of the casing pipe. The injection pipe bends from the vertical direction to the horizontal direction by the pipe bender when moving downward by the rod operation. While advancing into the ground through the entrance and exit of the side wall of the casing pipe, when moving upward by the rod operation, the pipe bender is retracted into the casing pipe while being bent from the horizontal direction to the vertical direction. It is said that the chemical liquid injector.
中空部を通じ噴射管に対しゲルタイムの比較的長い薬液
が供給されることを特徴とする請求項１記載の薬液注入
装置。2. The chemical liquid injector according to claim 1, wherein the rod is hollow, and the chemical liquid having a relatively long gel time is supplied to the injection pipe through the hollow portion of the rod.
管を通じ上記噴射管に対しゲルタイムの比較的短かい薬
液のＡ，Ｂ２液が個別に供給されることを特徴とする請
求項１記載の薬液注入装置。3. The rod has a double-tube structure, and the A and B2 liquids of the chemical liquid having a relatively short gel time are individually supplied to the injection pipe through the double pipe. 1. The chemical liquid injector according to 1.
態を基準にして、該噴射管は上部がロッドと同軸の直線
部また下部が所定の曲率で湾曲する曲線部であり、該噴
射管３の上部の直線部と下部の曲線部の左右両側には、
それぞれ加工ロールが、該ロールの周溝において噴射管
を左右両側から挟さむように上下に多段的に設置され、
かつこの設置状態において各段の加工ロールの回転中心
上を通る左右２本の延長線が噴射管の中心軸線と平行
し、之等多段設置の加工ロールから管ベンダーが構成さ
れていることを特徴とする請求項１記載の薬液注入装
置。4. The injection pipe 3 has an upper portion which is a straight portion coaxial with a rod and a lower portion which is a curved portion which is curved with a predetermined curvature, with reference to a state where the injection pipe is withdrawn into the casing pipe. On the left and right sides of the upper straight part and the lower curved part,
Each of the processing rolls is installed in a multi-stage vertically so as to sandwich the injection pipe from the left and right sides in the circumferential groove of the roll,
Also, in this installed state, the two left and right extension lines that pass on the center of rotation of the processing rolls of each stage are parallel to the central axis of the injection pipe, and the pipe bender is composed of the processing rolls that are installed in multiple stages. The chemical injection device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12641395A JP3661039B2 (en) | 1995-05-25 | 1995-05-25 | Chemical injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12641395A JP3661039B2 (en) | 1995-05-25 | 1995-05-25 | Chemical injection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08319614A true JPH08319614A (en) | 1996-12-03 |
| JP3661039B2 JP3661039B2 (en) | 2005-06-15 |
Family
ID=14934557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12641395A Expired - Lifetime JP3661039B2 (en) | 1995-05-25 | 1995-05-25 | Chemical injection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3661039B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100975398B1 (en) * | 2008-03-04 | 2010-08-11 | (주)동운엔지니어링 | Casing head for spiral grouting in steel pipe |
| KR20200024998A (en) * | 2018-08-29 | 2020-03-10 | 최영 | Grouting material injecting system of the weak soil foundation and grouting method using thereof |
-
1995
- 1995-05-25 JP JP12641395A patent/JP3661039B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100975398B1 (en) * | 2008-03-04 | 2010-08-11 | (주)동운엔지니어링 | Casing head for spiral grouting in steel pipe |
| KR20200024998A (en) * | 2018-08-29 | 2020-03-10 | 최영 | Grouting material injecting system of the weak soil foundation and grouting method using thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3661039B2 (en) | 2005-06-15 |
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