JPS58204215A - Ground improver - Google Patents
Ground improverInfo
- Publication number
- JPS58204215A JPS58204215A JP8622682A JP8622682A JPS58204215A JP S58204215 A JPS58204215 A JP S58204215A JP 8622682 A JP8622682 A JP 8622682A JP 8622682 A JP8622682 A JP 8622682A JP S58204215 A JPS58204215 A JP S58204215A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- ground
- shaft
- stirring blade
- blade
- 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
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
- E02D3/126—Consolidating by placing solidifying or pore-filling substances in the soil and mixing by rotating blades
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は軟弱地盤の改良装置に関し、より詳しくは主と
して、中間層にのみ軟弱地盤が存在する場合の地盤改良
装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an apparatus for improving soft ground, and more particularly relates to an apparatus for improving soft ground mainly when soft ground exists only in the intermediate layer.
例えば、地層がその上層からＡ層、Ｂ層。 For example, the upper strata are A layer and B layer.
０層、の如く形成され、中間のＢ層のみがピート層等の
軟弱層である場合１地表面の地盤法下等の問題が生ずる
。従来、このような軟弱層を改良するには次のようにし
て行っていた。その第１の方法としてはポーリング機械
により地盤を掘削し軟弱層８まで掘削孔７を第１図の如
く穿設する。そして、該掘削孔７に押通されたフィーダ
ー管６にセメントミルクや薬液等のグラウト剤を供給し
、該フィーダー管６の先端からそのグラウト剤を吐出す
ると共に、フィーダー管６を軟弱層Ｂの下層から順次引
き上げる。すると、Ａ層及び軟弱層８層内にほぼ柱状の
固結体９又はパイルが形成される。而してＡ層は固結体
９を介し、支持層である０層に支持されることになる。0 layer, and only the intermediate B layer is a soft layer such as a peat layer, problems such as under the soil law of the ground surface will occur. Conventionally, such a soft layer has been improved in the following manner. The first method is to excavate the ground using a poling machine and drill a hole 7 up to the soft layer 8 as shown in FIG. Then, a grouting agent such as cement milk or a chemical solution is supplied to the feeder tube 6 pushed through the excavated hole 7, and the grouting agent is discharged from the tip of the feeder tube 6. Raise the floor one by one from the bottom. Then, substantially columnar solid bodies 9 or piles are formed within the A layer and the eight soft layers. Thus, the A layer is supported by the support layer 0 layer via the solid body 9.
又、他の従来型の地盤改良方法としては、第２図の如く
先ず掘削機械により掘削孔７を軟弱層Ｂの上部まで穿設
する（第２図（ａ））、次に、第２図（ｂ）に示す従来
型地盤改良装置ｌＯを掘削孔７に挿入し、該装置ｌＯの
油圧モータ１１分駆動する。そして、二つのシャツ）１
を回転駆動し、その先端に取付けられた固定型の攪拌翼
２を回転させる。それと共に、該装置ｌＯの下端部を軟
弱ＢＢに進入させ、支持層Ｃまで到達させる。次に、第
２図（０）の如くフィーダーｗ６からセメントミルク等
のグラウト剤を注入し、該装置ｌＯを漸次上方へ移動す
る。In addition, as shown in Fig. 2, another conventional ground improvement method involves first drilling an excavation hole 7 to the top of the soft layer B using an excavating machine (Fig. 2 (a)), and then The conventional soil improvement device IO shown in (b) is inserted into the excavation hole 7, and the hydraulic motor of the device IO is driven for 11 minutes. And two shirts)1
is driven to rotate, and a fixed stirring blade 2 attached to its tip is rotated. At the same time, the lower end of the device IO enters the soft BB and reaches the support layer C. Next, as shown in FIG. 2(0), a grouting agent such as cement milk is injected from the feeder w6, and the apparatus IO is gradually moved upward.
すると、第２図（ｄ）の如く柱状の固結体又はパイルが
支持層であるＣ層上に形成される。Then, as shown in FIG. 2(d), columnar solids or piles are formed on the support layer C layer.
しかしながら、第１図及び第２図に示す如き、従来方法
による地盤改良においては、次の如き欠点を有していた
。第１の方法においては、フィーダー管６の吐出圧のみ
により固結体９を形成させるため、地中においてどの程
度の固結体９が形成されたのか不明であり、地盤改良の
信頼性に欠けていた。又、第２のへ方法による場合には
、攪拌翼を挿入する必要から、そのｆｌｋ半径に等しい
比較的大なる掘削孔７を穿設する必要がある。ところが
、軟弱層Ｂの上層にあるＡ層が比較的硬い地盤である場
合には、その横断面の大なる掘削孔７を穿設する事が困
難であり、その穿設に多くの作業時間を要していた。さ
らに、比較的硬い地盤であるＡ層に穿設された掘削孔７
にも固結体９を形成する必要があるから、その分だけク
ラウド剤をよけいに要していた。However, the conventional ground improvement method as shown in FIGS. 1 and 2 has the following drawbacks. In the first method, since the solids 9 are formed only by the discharge pressure of the feeder pipe 6, it is unclear how much solids 9 have been formed underground, and the reliability of ground improvement is lacking. was. Further, in the case of the second method, since it is necessary to insert a stirring blade, it is necessary to drill a relatively large excavation hole 7 whose radius is equal to the flk radius. However, if layer A, which is located above soft layer B, is relatively hard ground, it is difficult to drill a bore hole 7 with a large cross section, and it takes a lot of work time to drill the hole. It was necessary. Furthermore, drilling hole 7 was drilled in layer A, which is relatively hard ground.
Since it is also necessary to form a solid body 9, an additional amount of clouding agent is required.
そこで本発明は以上の欠点を取り除き、地盤改良作業を
容易迅速に行い得る装置を提供する事な目的とする。Therefore, it is an object of the present invention to eliminate the above-mentioned drawbacks and to provide an apparatus that can perform soil improvement work easily and quickly.
本発明は、昇降自在な回転駆動用のシャフトｌを有する
。そして、該シャフトｌの先端部又は中間部に攪拌翼２
を取付ける。さらに、該攪拌翼２に開翼機構４を設け、
該攪拌翼２の突出端部３が前記シャフト１の軸線に対し
て近接及び離反自在となるようにする。さらに、地盤改
良剤供給用のフィーダー管６の開口５を攪拌翼２の近傍
又は攪拌翼自体に導びくものである。従って、本装置の
攪拌翼２は開閉自在に構成されているので１その攪拌翼
２を閉として比較的小なるＡ層の掘削孔７に挿入するこ
とができる０そして、軟弱層である８層に達したら、攪
拌翼２を開翼し軟弱層である８層にのみ比較的大なる固
結体９を形成することができる０そのため１比較的硬い
地層であるＡ層には比較的小なる掘削孔７を穿設すれば
充分であるから、地盤改良を容易迅速に行い得るもので
ある。The present invention has a rotary drive shaft l that can be raised and lowered. A stirring blade 2 is attached to the tip or middle part of the shaft l.
Install. Further, the stirring blade 2 is provided with a blade opening mechanism 4,
The protruding end portion 3 of the stirring blade 2 is made to be able to move toward and away from the axis of the shaft 1. Furthermore, the opening 5 of the feeder pipe 6 for supplying the ground improvement agent is led to the vicinity of the stirring blade 2 or to the stirring blade itself. Therefore, since the stirring blade 2 of this device is configured to be openable and closable, it can be inserted into the relatively small excavation hole 7 of layer A with the stirring blade 2 closed. When reaching 1, the stirring blades 2 are opened to form relatively large solids 9 only in the soft layer 8. Therefore, 1 relatively small solids 9 can be formed in the relatively hard layer A. Since it is sufficient to drill the excavation hole 7, ground improvement can be carried out easily and quickly.
次に、図面に基づいて本発明の実施例につき詳細に説明
する。Next, embodiments of the present invention will be described in detail based on the drawings.
第３図〜第５図は本発明の装置の第１実施例を示し、第
３図はその縦断立面図、第４図はその側面図、第５図は
第３図のＡ−Ａ線断面図である。同装置はシャ７）１と
攪拌翼２と開翼機ｍＡびフィーダー管６を具備する。3 to 5 show a first embodiment of the device of the present invention, FIG. 3 is a longitudinal sectional elevation view thereof, FIG. 4 is a side view thereof, and FIG. 5 is a line taken along line A-A in FIG. 3. FIG. The apparatus is equipped with a shaft 7) 1, stirring blades 2, an open blade machine mA, and a feeder pipe 6.
そして、シャ７）１は中空体からなり、その上端外周面
にネジ部１２が螺刻されている。それと共に、シャフト
１の両側面の中間部から下端部にかけて欠切部１３を形
成する０さらに、シャ７）１の先端には掘削用のピッ）
１４が着脱自在に嵌着し得るものとしている０又、攪拌
翼２はシャツ）ｌの欠切部１３に夫々設けられた一対の
リンク機構からなり、それらのリンク機構がパンタグラ
フ状に屈伸し得るように構成されている。即ち、各リン
ク機構は第１部材２ａの一端と、第２部材２ｂの一端と
がピン１６により枢着されると共に、第１部材２ａの下
端がシャフト１の下端にビン１６により枢着される。そ
れと共に、第２部材２ｂの他端が第４図及び第５図の如
く連結棒１５にビン１６乙介して枢着される。その連結
棒１５はフィーダー管６の下端に枢着されている。そし
て、そのフィーダー管６は中空なシャフトｌ内に上下移
動可能に挿通されている。そのフィーダー管６が下方に
移動すると、その下端に枢着された連結棒１５がシャフ
ト１の割溝１７ （第５図）内を下降し、攪拌翼２は第
３図実線の状態から鎖線の如く開翼される。而して、本
実施例の閉翼機構４はフィーダー管６と連結棒１５と第
１部材２ａ、第２部材２ｂ及びそれらを連結するピン１
６により構成されている０なお、フィーダー管６の上端
には鋼管１８が着脱自在に螺着され、該鋼管１８に図示
しない地盤改良剤圧送装置が連通接続されると共に、該
鋼管１８が上下移動自在に支持される。又、フィーダー
管６の下端はシャ７）１の両欠切部１３に夫々開口５を
形成する。さらに、シャフト１の上端は鋼管１９に着脱
自在に螺着され、該鋼管１９が図示しないポーリング機
械のスクリュースピンドル等にチャック等を介して着脱
自在に接続されている。以上のように、第１実施例の装
置は極めて単純な構成からなる。そして特に本装置の閉
翼機構４がリンク機構からな、るため、故障のない操作
性の良い装置となり得る。The shaft 7) 1 is made of a hollow body, and a threaded portion 12 is threaded on the outer circumferential surface of the upper end thereof. At the same time, a notch 13 is formed on both sides of the shaft 1 from the middle to the lower end.Furthermore, at the tip of the shaft 7) there is a pit for drilling.
In addition, the stirring blades 2 consist of a pair of link mechanisms respectively provided in the cutout portions 13 of the shirt l, and these link mechanisms can be bent and extended in a pantograph shape. It is configured as follows. That is, in each link mechanism, one end of the first member 2a and one end of the second member 2b are pivotally connected by a pin 16, and the lower end of the first member 2a is pivotally connected to the lower end of the shaft 1 by a pin 16. . At the same time, the other end of the second member 2b is pivotally attached to the connecting rod 15 via a pin 16 as shown in FIGS. 4 and 5. The connecting rod 15 is pivotally connected to the lower end of the feeder tube 6. The feeder tube 6 is inserted into a hollow shaft 1 so as to be movable up and down. When the feeder pipe 6 moves downward, the connecting rod 15 pivotally attached to its lower end moves down within the groove 17 (Fig. 5) of the shaft 1, and the stirring blade 2 changes from the state shown by the solid line in Fig. 3 to the state shown by the chain line in Fig. 3. The wings are opened like this. Thus, the blade closing mechanism 4 of this embodiment includes the feeder pipe 6, the connecting rod 15, the first member 2a, the second member 2b, and the pin 1 that connects them.
A steel pipe 18 is removably screwed onto the upper end of the feeder pipe 6, and a ground improvement agent pumping device (not shown) is connected to the steel pipe 18, and the steel pipe 18 is moved up and down. freely supported. Further, the lower end of the feeder tube 6 has openings 5 formed in both cutout portions 13 of the shaft 7) 1, respectively. Further, the upper end of the shaft 1 is removably screwed onto a steel pipe 19, and the steel pipe 19 is removably connected to a screw spindle or the like of a polling machine (not shown) via a chuck or the like. As described above, the device of the first embodiment has an extremely simple configuration. In particular, since the wing-closing mechanism 4 of this device is composed of a link mechanism, the device can be trouble-free and easy to operate.
次に、本発明の前記第１実施例の作用につき説明する。 Next, the operation of the first embodiment of the present invention will be explained.
先ず、本装置を鋼管１８．１９を介し１図示しないポー
リング機械及び地盤改良剤圧送装置に接続する。それと
共に、シャツ）１の下端に掘削用のビット１４を取付け
る。そして、フィーダー管６を実線の如く位置させると
共に、攪拌ｍ２を実線の如く閉とする。このような状態
でポーリング機械の図示しないスクリュースピンドルを
回転させてビット１４により下方へ進出させる。そして
、第１図における比較的硬い地盤であるＡ層に掘削孔７
を穿設しさらに、ビット１４の先端を軟弱な地層である
８層の下端まで到達させる。次に、フィーダー管６を下
降させて攪拌翼２を＠線の如く開翼させる。次に、攪拌
翼２を開翼させた状態でシャフトｌを回転させると共に
、フィーダー管６の開口５から地盤改良剤であるセメン
トミルクあるいはそれと他の薬液（グラウト剤）を軟弱
層内に圧送する。このとき、シャツ）１は前記掘削時の
場合とは逆方向に回転され、該シャツ）１は上方へ移動
される。すると、軟弱層内にはフィーダー管６から地盤
改良剤が供給されて、該地盤改良剤が攪拌翼２により攪
拌される。そして、軟弱層内にはその下端から上端にか
けて第１２図に示す如きほぼ柱状の固結体９が確実に形
成される。そして支持層である０層と比較的硬い地盤で
あるＡ層との間に該固結体９が位置し、地盤Ａ層は支持
層Ｃに支持されることになる０次に、攪拌翼２がＡ層に
達したら、フィーダー管６を上昇させて該攪拌翼２を鎖
線の状態から実線の状態に位置させる。そして、シャツ
）１を抜き取れば地盤改良作業を完了し得る。First, this device is connected via steel pipes 18 and 19 to a polling machine and a ground improvement agent pumping device (not shown). At the same time, a drilling bit 14 is attached to the lower end of the shirt 1. Then, the feeder pipe 6 is positioned as shown by the solid line, and the agitation m2 is closed as shown by the solid line. In this state, the screw spindle (not shown) of the polling machine is rotated to cause the bit 14 to advance downward. Then, 7 holes were drilled into layer A, which is relatively hard ground in Figure 1.
Further, the tip of the bit 14 is made to reach the lower end of the 8th layer, which is a soft stratum. Next, the feeder tube 6 is lowered and the stirring blades 2 are opened as shown by the @ line. Next, the shaft l is rotated with the stirring blades 2 opened, and cement milk as a ground improvement agent or other chemical solution (grout agent) is pumped into the soft layer from the opening 5 of the feeder pipe 6. . At this time, the shirt 1 is rotated in the opposite direction to that during excavation, and the shirt 1 is moved upward. Then, the soil improving agent is supplied into the soft layer from the feeder pipe 6, and the soil improving agent is stirred by the stirring blades 2. A substantially columnar solid body 9 as shown in FIG. 12 is reliably formed within the soft layer from its lower end to its upper end. The solid body 9 is located between the support layer 0 layer and the relatively hard ground layer A, and the ground layer A is supported by the support layer C. When it reaches layer A, the feeder tube 6 is raised to move the stirring blade 2 from the chain line to the solid line. Then, by removing Shirt 1, the ground improvement work can be completed.
第６図〜第８図は本発明の第２実施例を示す。そして第
２実施例が前記第１実施例と異る点は、攪拌Ｒ２の閉翼
機構４である。同実施例では攪拌翼２の第２部材２ｂが
ロッド２０の下端に枢着され、該ロッド２０の上端がシ
ャフト１の上端部に着脱自在に接続される。そして掘削
孔７に該攪拌翼２その他を挿入するには第８図の如く該
攪拌翼２を閉とする。そして該攪拌翼２が軟弱層Ｂの下
端に達したら、ロッド２０の上端を第７＠の如くポーリ
ング機械２２の基台２１に固定する。次に、シャツ）１
を上昇し、攪拌翼２を第６図の状態にする。6 to 8 show a second embodiment of the present invention. The second embodiment differs from the first embodiment in the closing blade mechanism 4 of stirring R2. In this embodiment, the second member 2b of the stirring blade 2 is pivotally attached to the lower end of a rod 20, and the upper end of the rod 20 is detachably connected to the upper end of the shaft 1. To insert the stirring blade 2 and the like into the excavated hole 7, the stirring blade 2 is closed as shown in FIG. When the stirring blade 2 reaches the lower end of the soft layer B, the upper end of the rod 20 is fixed to the base 21 of the polling machine 22 as shown in the seventh @. Next, shirt) 1
is raised, and the stirring blade 2 is brought into the state shown in FIG.
次に、ロッド２０の上端を基台２１から取り外し、第６
図の如くシャ７）１に連結する。そして図示しない地盤
改良剤圧送装置からセメントミルク等を供給し、シャフ
ト！企回転させながら上昇させるものである。Next, the upper end of the rod 20 is removed from the base 21, and the sixth
Connect to the shaft 7) 1 as shown in the figure. Then, cement milk, etc. is supplied from a ground improvement agent pumping device (not shown), and the shaft! It is intended to be raised while rotating.
次に、第９図、第１０図は本発明の装置の閉翼機構４の
第３実施例である。同実施例においては攪拌翼２の一端
にウオーム歯車２３が固着されると共に、その軸心がビ
ン１６を介し、シャ７）１下端部に枢着される。そして
、シャツ）１の下端に取付けたウオーム２４と前記ウオ
ーム歯車２３とが噛合する。そして、シャツ）１内に挿
通されたウオーム回転軸２５を回転することにより、攪
拌翼２を開閉し得るものである。Next, FIGS. 9 and 10 show a third embodiment of the blade closing mechanism 4 of the apparatus of the present invention. In this embodiment, a worm gear 23 is fixed to one end of the stirring blade 2, and its axis is pivotally connected to the lower end of the shaft 7) 1 via a bottle 16. Then, the worm 24 attached to the lower end of the shirt 1 and the worm gear 23 mesh with each other. By rotating the worm rotating shaft 25 inserted into the shirt 1, the stirring blades 2 can be opened and closed.
次に、第１１図は本発明の装置の開翼機構４の第４実施
例を示す。同実施例においては、攪拌翼２がその一端で
シャフト１の下端に枢着され、シャフトｌの回転に伴う
遠心力によってのみ攪拌翼２が鎖線の状態から実線の状
態に開翼するものである。Next, FIG. 11 shows a fourth embodiment of the blade opening mechanism 4 of the device of the present invention. In this embodiment, one end of the stirring blade 2 is pivotally attached to the lower end of the shaft 1, and the stirring blade 2 is opened from the state shown by the chain line to the state shown by the solid line only by the centrifugal force accompanying the rotation of the shaft 1. .
なお、本発明は上記実施例に限定されるものでは勿論な
く、本発明の技術思想を逸脱しない範囲において、適宜
応用改変し得る。例えば、攪拌翼２は本実施例において
は回転シャフト１の先端部に設けたが、その攪拌翼２を
シャフト！の中間部に設けることもできる。It should be noted that the present invention is of course not limited to the above-mentioned embodiments, and may be appropriately modified without departing from the technical idea of the present invention. For example, in this embodiment, the stirring blade 2 is provided at the tip of the rotating shaft 1, but the stirring blade 2 is attached to the shaft! It can also be provided in the middle of the
又、本実施例においてはフィーダー管６の開口５が攪拌
翼２の上部近傍に導ひかれているが、該攪拌翼２の下部
近傍に導ひいても、あるいは攪拌翼自体に設けてもよい
。又、攪拌翼２の形状も適宜変更し得ると共に、該攪拌
翼２の開翼機構４又は攪拌翼自体に弾性体を介装するこ
とにより、攪拌翼２に無理な力が加った場合に、該攪拌
翼２の損傷を防止し得るように構成してもよい。Further, in this embodiment, the opening 5 of the feeder tube 6 is guided near the top of the stirring blade 2, but it may be guided near the bottom of the stirring blade 2, or may be provided in the stirring blade itself. In addition, the shape of the stirring blade 2 can be changed as appropriate, and by interposing an elastic body in the blade opening mechanism 4 of the stirring blade 2 or the stirring blade itself, it is possible to prevent the stirring blade 2 from being subjected to excessive force. , the stirring blade 2 may be configured to be prevented from being damaged.
本発明の装置は以上のような構成からなり、次の効果を
有する。The device of the present invention has the above configuration and has the following effects.
本装置の攪拌翼２はシャ７）１に開閉自在に取付けられ
ているから、比較的硬い地層を通過するときには、それ
を閉とし、軟弱層に達したらその攪拌翼２を開翼して該
軟弱層内に地盤改良剤を供給しつつ、それを攪拌し、そ
の軟弱層の地盤を比較的広範囲に改良し得る。そして、
比較的硬い地層には比較的小なる掘削孔７のみを穿設す
れば足りるから、地盤改良作業が容易迅速に行い得る。The stirring blade 2 of this device is attached to the shaft 7) 1 so that it can be opened and closed, so when passing through a relatively hard stratum, it is closed, and when it reaches a soft layer, the stirring blade 2 is opened. By supplying the soil improvement agent into the soft layer and stirring it, the soil in the soft layer can be improved over a relatively wide range. and,
Since it is sufficient to drill only a relatively small excavation hole 7 in a relatively hard stratum, ground improvement work can be carried out easily and quickly.
それと共に、本装置により形成した固結体９は、比較的
硬い地層である第１２図の如きＡ層の下部を支持層Ｃに
支持させることができ、Ａ層の地盤法下等を確実に防止
し得る効果がある。即ち、本装置により形成された直結
体９の上端及び下端をＡ層の下面及び０層の上面にほぼ
接続し得るものである。さらに、本装置によれば、比較
的硬い地盤であるＡ層には比較的小なる掘削孔７を穿設
すればよいから、該掘削孔７に充填すべきグラウト剤等
の量を小とし、全体として従来に比べ、グラウト剤の使
用量を減少させ得る効果がある。さらには、本掘削孔７
は比較的小であるから、そこにグラウト剤を充填する必
要がない場合が多い。At the same time, the consolidated body 9 formed by this device can support the lower part of layer A, which is a relatively hard stratum, as shown in FIG. There is a preventive effect. That is, the upper and lower ends of the direct connection body 9 formed by the present device can be approximately connected to the lower surface of layer A and the upper surface of layer 0. Furthermore, according to this device, since it is only necessary to drill a relatively small excavation hole 7 in layer A, which is a relatively hard ground, the amount of grouting agent etc. to be filled into the excavation hole 7 can be reduced. Overall, there is an effect that the amount of grouting agent used can be reduced compared to the conventional method. Furthermore, this drilling hole 7
Because they are relatively small, there is often no need to fill them with grout.
なお、本装置は地盤沈下の用途のみに用いられることな
く、他の用途例えば止水工事、地すべり防止等に用いる
こともできる。さらに本装置は主として中間層に軟弱地
盤が存在する場合に用いられるが、それに限ることなく
、地表面まで軟弱地盤が存在する場合にも用いてもよい
。Note that this device is not only used for ground subsidence purposes, but can also be used for other purposes such as water stoppage work and landslide prevention. Furthermore, although this device is mainly used when soft ground exists in the intermediate layer, it is not limited thereto, and may also be used when soft ground exists up to the ground surface.
第１図及び第２図は従来の装置による地盤改良工法を示
す縦断面図、第３図は本装置の第１実施例の縦断立面図
、第４図は同右側面図、第５図は第３図のＡ−Ａ線断面
図、第６図は本装置の第２実施例の立面図、第７図は同
実施例の開翼機構４を開閉する除の説明図１第８＠は攪
拌翼２を閉とした状態を示す、第９図は本装置の開翼機
構４の第３実施例を示す縦断面図１第１０図は第９図の
Ｂ−Ｂ線断面図１第１！図は本装置の開翼機構４の第４
実施例、第１２図は本装置により軟弱層Ｂ層に形成され
た固結体９である。
！・・・シャフト、２・・・攪拌翼、２ａ・・・第１部
材、２ｂ・・・第２部材、３・・・突出端部、４・・・
開翼機構、５・・・開口、６・・・フィーダー管、７・
・・掘削孔、８・・・パイプ、９・・・固結体、ｌｏ・
・・従来型地盤改良装置、１１・・・油圧モータ、！２
・・・ネジ部、！３・・・欠切部、１４・・・ピッ）
、１５−・・連結棒、１６・・・ビン、１７・・・割溝
、１８．１９・・・鋼管、２０・・・ロッド、２１・・
・基台、２２・・・ボウリング機械、２３・・・ウオー
ム歯車、２４・・・ウオーム、２５・・・ウオーム回転
軸。
代理人 弁理士窪 １）卓 美
第１１図
第１２図Figures 1 and 2 are vertical sectional views showing the ground improvement method using conventional equipment, Figure 3 is a vertical sectional elevation view of the first embodiment of this equipment, Figure 4 is a right side view of the same, and Figure 5. is a sectional view taken along the line A-A in FIG. 3, FIG. 6 is an elevational view of the second embodiment of this device, and FIG. ＠ shows the state in which the stirring blade 2 is closed. FIG. 9 is a vertical cross-sectional view showing the third embodiment of the blade opening mechanism 4 of this device. FIG. 10 is a cross-sectional view taken along the line B-B in FIG. 9. 1st! The figure shows the fourth part of the blade opening mechanism 4 of this device.
Example FIG. 12 shows a solid body 9 formed in the soft layer B by this apparatus. ! ...shaft, 2... stirring blade, 2a... first member, 2b... second member, 3... projecting end, 4...
Wing opening mechanism, 5... Opening, 6... Feeder pipe, 7.
・・Drilling hole, 8・Pipe, 9・Solid body, lo・
・・Conventional ground improvement device, 11...Hydraulic motor,! 2
...Screw part! 3... cutout, 14... beep)
, 15-... Connecting rod, 16... Bin, 17... Division groove, 18.19... Steel pipe, 20... Rod, 21...
- Base, 22... Bowling machine, 23... Worm gear, 24... Worm, 25... Worm rotation axis. Agent Patent Attorney Kubo 1) Takumi Figure 11 Figure 12
Claims (1)
１）の先端部又は中間部に取付けられた攪拌ｍ＠と、該
攪拌翼（２）の突出端部＠）が前記シャフト１）の軸線
に対して近接及び離反自在となるように該攪拌翼■に設
けた閉翼機構（４）と、攪拌翼２）の近傍又は攪拌翼？
）自体に開口５）が導かれた地盤改良剤供給用のフィー
ダー管向と、を具備する地盤改良装置。A rotary drive shaft a) that can be raised and lowered and 1.
The stirring blade (1) is attached to the tip or intermediate part of the stirring blade (2) so that the protruding end @) of the stirring blade (2) can move toward and away from the axis of the shaft 1). Closed blade mechanism (4) provided in ■ and the vicinity of stirring blade 2) or stirring blade?
) a feeder pipe for supplying a soil improvement agent, into which an opening 5) is guided;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8622682A JPS58204215A (en) | 1982-05-20 | 1982-05-20 | Ground improver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8622682A JPS58204215A (en) | 1982-05-20 | 1982-05-20 | Ground improver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58204215A true JPS58204215A (en) | 1983-11-28 |
Family
ID=13880870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8622682A Pending JPS58204215A (en) | 1982-05-20 | 1982-05-20 | Ground improver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58204215A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60148917A (en) * | 1984-01-12 | 1985-08-06 | Tenotsukusu:Kk | Blade spreading device for agitating blades for ground improving device |
| BE1016355A3 (en) * | 2003-07-24 | 2006-09-05 | Keller Grundbau Gmbh | |
| US20150086277A1 (en) * | 2013-09-25 | 2015-03-26 | William E HODGE | Method and apparatus for volume reduction of fine particulate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5181410A (en) * | 1975-01-13 | 1976-07-16 | Yasuo Abe | JIBANNOJIZENKAIRYOHOHOTO SONOSOCHI |
| JPS5242508B2 (en) * | 1972-09-26 | 1977-10-25 | ||
| JPS5427211A (en) * | 1977-08-02 | 1979-03-01 | Japan National Railway | Method of construction of improving line ground |
-
1982
- 1982-05-20 JP JP8622682A patent/JPS58204215A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5242508B2 (en) * | 1972-09-26 | 1977-10-25 | ||
| JPS5181410A (en) * | 1975-01-13 | 1976-07-16 | Yasuo Abe | JIBANNOJIZENKAIRYOHOHOTO SONOSOCHI |
| JPS5427211A (en) * | 1977-08-02 | 1979-03-01 | Japan National Railway | Method of construction of improving line ground |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60148917A (en) * | 1984-01-12 | 1985-08-06 | Tenotsukusu:Kk | Blade spreading device for agitating blades for ground improving device |
| JPH0419331B2 (en) * | 1984-01-12 | 1992-03-30 | Tenotsukusu Kk | |
| BE1016355A3 (en) * | 2003-07-24 | 2006-09-05 | Keller Grundbau Gmbh | |
| US20150086277A1 (en) * | 2013-09-25 | 2015-03-26 | William E HODGE | Method and apparatus for volume reduction of fine particulate |
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